CA1295160C - Quick change spindle adapter for tool holder - Google Patents
Quick change spindle adapter for tool holderInfo
- Publication number
- CA1295160C CA1295160C CA000582872A CA582872A CA1295160C CA 1295160 C CA1295160 C CA 1295160C CA 000582872 A CA000582872 A CA 000582872A CA 582872 A CA582872 A CA 582872A CA 1295160 C CA1295160 C CA 1295160C
- Authority
- CA
- Canada
- Prior art keywords
- spindle
- tool holder
- sleeve
- adaptor
- nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
- B23B31/02—Chucks
- B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
- B23B31/113—Retention by bayonet connection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/15—Threaded grip
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/16—Longitudinal screw clamp
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/17—Socket type
- Y10T279/17931—Screw threaded
- Y10T279/17941—Nut lock
- Y10T279/17948—Threaded sleeve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T279/00—Chucks or sockets
- Y10T279/34—Accessory or component
- Y10T279/3406—Adapter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/94—Tool-support
- Y10T408/95—Tool-support with tool-retaining means
- Y10T408/957—Tool adapter
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/309352—Cutter spindle or spindle support
- Y10T409/309408—Cutter spindle or spindle support with cutter holder
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/30952—Milling with cutter holder
Abstract
ABSTRACT OF THE DISCLOSURE
A quick change spindle adaptor for a power driven spindle having an axial bore and a tool holder having a shank axially projected into the spindle. A
sleeve is secured upon the spindle and an outer shell is rotatably mounted upon the sleeve and retained thereon and includes a nut. A conical recess within the inner bore surface at the forward end of the spindle defines An axial bearing and receives a centering cone on the tool holder for maintaining an axial self alignment of the tool holder and spindle. Spaced threaded segments upon the tool holder are threadedly engaged by the nut for axially anchoring the tool holder upon the spindle and for biasing the centering cone into engagement with the spindle bearing.
A quick change spindle adaptor for a power driven spindle having an axial bore and a tool holder having a shank axially projected into the spindle. A
sleeve is secured upon the spindle and an outer shell is rotatably mounted upon the sleeve and retained thereon and includes a nut. A conical recess within the inner bore surface at the forward end of the spindle defines An axial bearing and receives a centering cone on the tool holder for maintaining an axial self alignment of the tool holder and spindle. Spaced threaded segments upon the tool holder are threadedly engaged by the nut for axially anchoring the tool holder upon the spindle and for biasing the centering cone into engagement with the spindle bearing.
Description
60,199-065 QUICK_C~ANGE ~pINDLE-~D~pToR-FoR-T-Q-Q-L-~oLDER
The present invention relates to over spindle adaptors ror quick change tooling on high volume multiple spindle machine tools.
The present application is co-pellding with applicatioll serial number 943,825 filed December 29, 1986 of ApplicanL's Assignee, entitled QUICK CHANGE SPINDLE ADAPTOR FOR TOOL HOLDER now U.S. Patent No.
4,710,079 dated December 1, 1987.
Previously, in the use of over the spindle adaptors for quic~
change tool holders such as set forth in the co-pending application there was employed a retractable spring biased sleeve mounted upon a bodv on a spindle havlng an internal taper engaging a series of balls moun.ed within the body extending from its opposite sides for operative reta;ning engagement with a tapered collar on the tool holder for operatlvely retaining the tool holder within and upon the spindle. In working w;th aluminum parts, the cuttings often got into and piled up within the ~)aLI
assemblies and related parts.
With increased usage of alwnin~un cascines and the borin~ o such castings with certain types of multiple spindle tools, the tcols employecl are approxlmately one-third the length of the tools prev~cusly used on multipLe spindle clrill heads or on single spindLe applications There is a need for an hllproved quick change spinclle ;~dal)t-)r wherein ball bearings are not needed to eEfectively ancho~ the tool bolder within and upon the spindle and to axially bias the tool l1OICILer a~d the tool mounted thereon into the spindle.
60,199-065 An important feature of the present invention i8 to prov:i.de an improved quick change spindle adaptor for a tool holder assembly, whereill the ball bearings have been omitted and replaced by a EasLening nut rotatably mounted and anchored upon the quick change spindle adaptor assembly for cooperative registry with a threaded means upon the tool holder. Such threaded means is operatively received and threadedly engaged by the nut upon the adaptor so as to axially secure the tool holder upon the spindle with the tool holder shank projected into the spindle bore and self-centered therein.
As an important feature the power rotated spi.ndle includes an axial bore and at its forward end is adapted to receive the tool holder. A conical recess is formed within the inner bore surface at the forward end of the spindle defi.ning a conical bearing adapted to receive a centering cone upon and around the tool holder. The centering cone is arranged forwardly of the tool holder shank and is in snug axial registry with said bearing Eor maintaining an axial self-alignment oE the tool holder and spindle.
~ 6 still another feature a nut is rotatably mounted an(l anchored upon a sleeve secured to the spindle for lim:ited rotary adjustment and adapted to threadedLy receive the corresponding threaded member upon the tool holder Eorwardly oE the centerlng cone thereon Eor axially anchorillg the tool holder UpOIl the spi.ndle and Eor bia~ing tlle centering cone into continuous inward engagemetlt within the splndle bearing .
~ s still another feature, a sleeve is mounted upon ~he spindle and secured thereto and over the sleeve is rotatably mounted an outer shell retained thereon against longitudinal movement and .ncludi.ng 60,199-065 ~ ~ ~
a forwardly arranged lnternally threadecl nut adapLed to threadedly engage a corresponding threaded member UpOII the tool holder for c~ially ancllorirlg the tool holder upon the spindle.
As another eature the internally threaded nut upon the outer shell includes a pair of 180 related axial windows or interruptions in the threads adapted to cooperatively receive a pair of opposed 180 related threaded segments 1Ipon the tool holder whereby a limited angular rotation of the nut relative to the threaded segments is adaptecl .o axially anchor the tool holder upon the spindle and at the same time blas the centering cone into continuouæ inward engagement and nesting within the conical spindle bearing.
As still another feature, mounted upon the tool holder is an annular chip guard of a flexible material such as rubber having at one end an annular sleeve snugly engaging the tool holder and at its outer periphery a tapered flange in wiping and sealing registry with the nut on the outer shell for excluding chips, debris and lubricants from the interior of the nut, adaptor and the spindle.
As a further Eeature, an additlonal flexLble boot of rubber or equivalent material ls snugly mo~mted around the outer shell alld extends axially over exposed portLons oE ttle sleeve UpOII the spindle a~ld includes a radlal apertured flallge at one end in seallng reglstry with the spindle for excludinK chips, debris, and lubricants from the interior of the quick change adaptor, spindle and nut assembly.
As an important feature oE the present invention the threaded means by which the adaptor is anchored to a tool holder may be empll~yed to other tool holders mounting a tool and having an elongated shank 60 9 199-065 ~ 6~
projected lnto the bore of a power rotated spindle and keyed thereto, and wherein independent means are employed or centering the tool holder witl respect to the spindle.
These and other objects and features wilL be seen Erom the Eollowing specification and claims in conjunction wlth the appended drawings.
Figure 1 is an Longitudinal section of a quick change tool holder with the tool mounted therein and fragmentarily shown.
Figure 2 is a left end elevational view thereof.
Figure 3 is a fragmentary longitudinal section of the quick change spindle adaptor and splndle with the tool holder of Figure 1 on a reduced scale, assembled therein.
Figure ~ i9 a left end view thereoE.
Figure 5 ls a frngmentary longitudinal section of the present over the spindle adaptor, with the spindle having a conical bear-ng and partly broken away and sectioned.
Figure 6 is a similar view wlth the present over the sp;ndLe adaptor mounted upon an elongated sleeve over the spLndle, w;th the conical bearillg omitted.
Figure 7 is a side elevational view of the threaded shaft of a tool holder, fragmentarily shown, of general construction, having threaded segments adapted for use with the present over the spindLe quick change adaptor shown in Figure 6, on an increased scale.
~ t~ .ri~D
60~199-~65 Figure 3 i5 an end view thereof.
It will be understood that the above drawings illustrate mexely preferred embodiments of the invention, and that o~her embodimellts are contemplated within the scope of the claims hereafter set forth.
Referring to the drawings the present quick change spindle adaptor 11 for a tool holder assembly, Figure 3, is used in conjunctioll with the power rotated spindle 13, fragmentarily sllown, adapted fcr connection to a power rotated multiple spindle drill head 15 of a machine tool schematically shown. The present quick change spindle adaptor may be used upon a single power driven spindle, but in most systems i9 employed in conjunction with high volume multiple spindle machine tools.
Spindle 13 has a forward end of reduced diameter and a longitudinal bore 19 adapted to receive tool holder 49, Figure 1. Said spindle has a longitudinal keyway 21 therein adapted to receive a Woodruff Key 59 or other key normally mountecl upon the tool holder.
The syindle 13 sometimes referred to as having a forward e~
includes a conical recess 23 within its inner bore surface at its forwarcl erld deEining a conical bearln~. The conical recess 23 OpellS Eorwa-dly and outwarclly. The lncluded allgLe beLween opposite sides oE the conical bearing, Figure 3, is 50, approximately, in the illustrative embodiment.
Sleeve 25 is mo~mted over spindle 13 at its forwarcl end alld i6 secured in position by the radial set screw 27. Said set screw extends through a radial ayerture 29 in sleeve 25 and is threaded at 31 into spindle 13, Figures 3 and 5.
60,lg9-065 In the modlfication shown in Figure 6, the set screw 27' has a button head adapted to operatively engage the normally convex thrust washer 30 within sleeve 25 and bearing against spindle 13. The l~utton head is held in compression to more firmly retain said sleeve.
A pair oE annular grooves 33 are formed within sleeve 25 adapted to receive locking rings 35 and 37, Figures 3 and 6. Amlular outer shell 39 is rotatively positioned upon sleeve 25 and i-ncludes an internal annular flange 4l in engagement with said sleeve. Said flange upon its opposite sides is retainingly engaged by the lock rings or snap rings 35 and 37. This provides a means of rotatably mounting the ouler shell 39 upon sleeve 25 and restraining said sleeve against relative longitudinal movements.
The forward end of the outer shell 39 terminates in the nut 43 which is interiorally threaded at 45 throughout 360, with the exception of a paLr of 180 axial windows 47 therein Figure 4.
The present tool holder assembly is generally indicated at 49, Figures l and 3~ sometimes reEerred to as a true tapered collet chuck holder assembly for supportlvely mounting the tool T which may be a drill, a reamer or a counter boring tool, fragmentarily shown :in Figure :L. The tool holder afi6embly includes annular body 5l intermediate its ends upon which are arranged a pair oE opposed l80 related thread segments 53, Figures l and 2. Thread segments 53 are adapted Eor registry wLthil1 nut windows ~7 and with the interior threads 45 of nut 43, Figure 3. In such assembly as the tool holder 49 is assembled luto the bore of spindle 13 the corresponding opposed thread segments 53 are axially projected into and through the axial windows l!7 in nut 43 whlcl is a part of outer shell 39.
60,199-~65 ~2~
Tool holder 49 includes elongatecl cylindrical shank 55 which extends to one end thereof and is adapted for a slidtng projection into the forward end of the corresponding bore 19 of the spindle. Annular centering cone 57 is formed upon the tool holder forwardly of shank 55 and adjacent the annular body 51 and thread segments 53. The centering cone surfaces define and includecl angle of 50, approximately, corresponding to the included angle between the corresponding opposed walls of conical recess 23 formed in the forward end of syindle 13.
Centering cone 57 is complimental to conical recess 23 and adapted ~or cooperative SIlUg nesting and axial assembly thereinto, Figure 3.
In the basic assembly using the conical bearing surface 23 and the centering cone 57, said cone is designed to seat solidly against the spindle face. The independent movement of the lock in cone 57 permits proper clamping on the center line of the spindle utilizing the present quick change spindle adaptor and including the nut 43.
The positive drive assembly 63 is threaded into the bore 61 and is adapted to operatively engage the tang 71 upon the inner encl oF
tool T for a driving relation therebetween. By lon~itudinally adjustillg the yositive drive assembly 63 relative to bore 61 the extension oE tool T from the outer end oE the tool holder may be ad~uste~d.
The bocly extenaion 65 of the tool holder 49 is exteriorally threaded. There is mountecl thereon a con~entional threaded nose piece 67 which mounts a conventional split collet assembly 69 adapted to clxially grip the tool T, frag~tentarily shown which may be a drlll, a counter boring tool, a reamer or other tool. Such tool is normally arranged UpOII
the longitudinal axis of tool holder 49 and secured thereitl upon the 60,199-065 tightening of nose piece 67 in an conventional malmer. Its descrLption is not repeated herein.
As shown in Figure 3, a chip guard 73 of flexible material such as rubber includes an annular mount sleeve 75 which surrounds the tool holder body extension 65. Portions of the chip guard extend radially outward and terminate in the tapered amlular flange 77 in operative wiping and seaLing engagement with the outer shell and nut assembly 39. The chip guard serves to exclude chips, debris and lubricants from the interior of the nut assembly, spindle and spindle adaptor.
The protective boot 79 of cylindrical shape, Figure 5, is mounted around outer shell 39 and is constructed of Elexible material such as rubber. The boot extends over an exposed portion of sleeve 25 and includes radial wall 81 apertured to cooperatively register witll the forward end of spindle 13. Boot 79 protectively seals and encloses outer shell 39, sleeve 25 and the spindle to exclude chips, debris and lubricant from the interior of the quick change adaptor, from the nut assembly and from the spindle.
In the modification shown in FLgures 7 and 8 there i.9 ShOW!I a tool holder shaft 83 of general construction wh;ch -is exterioralLJr threaded at 85 over which a nut 87, lllternally thrended at 8~, is threaded, and secured as by a set screw 27 and includes a pair of L8~
related thread segments 91 adapted for use in conjunctioll with tlle adaptor assembly of Figure 6.
The quick change spindle adaptor, sho~l in Figure fi, i5 substantially the same as above described with respect to Figure 5 e~cept that the sleeve 25 has been elongated. The spindle element L3 receiYing 60,199-065 sleeve 25 is longer. There is the longitudillal ~ore 19 axially oE
spindle 13 to receive a tool holder~ There is no centering cone as shown at 23 in Figure 5. The spindle adaptor assembly 39, 25 shown in Fi~ure 6 may be used with other types of tool holders which have different means for effecting an alignment between the tool holder and the spindle.
All that is required is that the tool holder shank 83 in Figures 7 and 8 is exteriorly threaded at 85 to receive the nut 87 having the threaded bore 89, secured in position upon the shaft 83 by set screw 27. The adaptor assembly including outer shell 39 and nut 43, 45 retained on sleeve 25 cooperatively receives the pair of opposed thread segments 91 upon nut 87 in the same manner as above described relative to Figures 3, 4 and 5. Here also the corresponding thread segments 91 are initially assembled axially into the corresponding windows 47 of the nut 43 UpOIl the quick change adaptor outer shell 39 and thereafter the nut 45 is rotated a limited distance as for example up to 90 more or less, or such sufficient angle as to fixedly anchor the tool holder to the spindle.
This is effective for securing the tool holder and in axial alignment within and upon the power rotated spindle.
With the present quLck change spindle adaptor challges i~l tooling wilL take Eive (5) seconds as compared to standard methods taking upon to two (2) mLnutes.
The present invention relates to over spindle adaptors ror quick change tooling on high volume multiple spindle machine tools.
The present application is co-pellding with applicatioll serial number 943,825 filed December 29, 1986 of ApplicanL's Assignee, entitled QUICK CHANGE SPINDLE ADAPTOR FOR TOOL HOLDER now U.S. Patent No.
4,710,079 dated December 1, 1987.
Previously, in the use of over the spindle adaptors for quic~
change tool holders such as set forth in the co-pending application there was employed a retractable spring biased sleeve mounted upon a bodv on a spindle havlng an internal taper engaging a series of balls moun.ed within the body extending from its opposite sides for operative reta;ning engagement with a tapered collar on the tool holder for operatlvely retaining the tool holder within and upon the spindle. In working w;th aluminum parts, the cuttings often got into and piled up within the ~)aLI
assemblies and related parts.
With increased usage of alwnin~un cascines and the borin~ o such castings with certain types of multiple spindle tools, the tcols employecl are approxlmately one-third the length of the tools prev~cusly used on multipLe spindle clrill heads or on single spindLe applications There is a need for an hllproved quick change spinclle ;~dal)t-)r wherein ball bearings are not needed to eEfectively ancho~ the tool bolder within and upon the spindle and to axially bias the tool l1OICILer a~d the tool mounted thereon into the spindle.
60,199-065 An important feature of the present invention i8 to prov:i.de an improved quick change spindle adaptor for a tool holder assembly, whereill the ball bearings have been omitted and replaced by a EasLening nut rotatably mounted and anchored upon the quick change spindle adaptor assembly for cooperative registry with a threaded means upon the tool holder. Such threaded means is operatively received and threadedly engaged by the nut upon the adaptor so as to axially secure the tool holder upon the spindle with the tool holder shank projected into the spindle bore and self-centered therein.
As an important feature the power rotated spi.ndle includes an axial bore and at its forward end is adapted to receive the tool holder. A conical recess is formed within the inner bore surface at the forward end of the spindle defi.ning a conical bearing adapted to receive a centering cone upon and around the tool holder. The centering cone is arranged forwardly of the tool holder shank and is in snug axial registry with said bearing Eor maintaining an axial self-alignment oE the tool holder and spindle.
~ 6 still another feature a nut is rotatably mounted an(l anchored upon a sleeve secured to the spindle for lim:ited rotary adjustment and adapted to threadedLy receive the corresponding threaded member upon the tool holder Eorwardly oE the centerlng cone thereon Eor axially anchorillg the tool holder UpOIl the spi.ndle and Eor bia~ing tlle centering cone into continuous inward engagemetlt within the splndle bearing .
~ s still another feature, a sleeve is mounted upon ~he spindle and secured thereto and over the sleeve is rotatably mounted an outer shell retained thereon against longitudinal movement and .ncludi.ng 60,199-065 ~ ~ ~
a forwardly arranged lnternally threadecl nut adapLed to threadedly engage a corresponding threaded member UpOII the tool holder for c~ially ancllorirlg the tool holder upon the spindle.
As another eature the internally threaded nut upon the outer shell includes a pair of 180 related axial windows or interruptions in the threads adapted to cooperatively receive a pair of opposed 180 related threaded segments 1Ipon the tool holder whereby a limited angular rotation of the nut relative to the threaded segments is adaptecl .o axially anchor the tool holder upon the spindle and at the same time blas the centering cone into continuouæ inward engagement and nesting within the conical spindle bearing.
As still another feature, mounted upon the tool holder is an annular chip guard of a flexible material such as rubber having at one end an annular sleeve snugly engaging the tool holder and at its outer periphery a tapered flange in wiping and sealing registry with the nut on the outer shell for excluding chips, debris and lubricants from the interior of the nut, adaptor and the spindle.
As a further Eeature, an additlonal flexLble boot of rubber or equivalent material ls snugly mo~mted around the outer shell alld extends axially over exposed portLons oE ttle sleeve UpOII the spindle a~ld includes a radlal apertured flallge at one end in seallng reglstry with the spindle for excludinK chips, debris, and lubricants from the interior of the quick change adaptor, spindle and nut assembly.
As an important feature oE the present invention the threaded means by which the adaptor is anchored to a tool holder may be empll~yed to other tool holders mounting a tool and having an elongated shank 60 9 199-065 ~ 6~
projected lnto the bore of a power rotated spindle and keyed thereto, and wherein independent means are employed or centering the tool holder witl respect to the spindle.
These and other objects and features wilL be seen Erom the Eollowing specification and claims in conjunction wlth the appended drawings.
Figure 1 is an Longitudinal section of a quick change tool holder with the tool mounted therein and fragmentarily shown.
Figure 2 is a left end elevational view thereof.
Figure 3 is a fragmentary longitudinal section of the quick change spindle adaptor and splndle with the tool holder of Figure 1 on a reduced scale, assembled therein.
Figure ~ i9 a left end view thereoE.
Figure 5 ls a frngmentary longitudinal section of the present over the spindle adaptor, with the spindle having a conical bear-ng and partly broken away and sectioned.
Figure 6 is a similar view wlth the present over the sp;ndLe adaptor mounted upon an elongated sleeve over the spLndle, w;th the conical bearillg omitted.
Figure 7 is a side elevational view of the threaded shaft of a tool holder, fragmentarily shown, of general construction, having threaded segments adapted for use with the present over the spindLe quick change adaptor shown in Figure 6, on an increased scale.
~ t~ .ri~D
60~199-~65 Figure 3 i5 an end view thereof.
It will be understood that the above drawings illustrate mexely preferred embodiments of the invention, and that o~her embodimellts are contemplated within the scope of the claims hereafter set forth.
Referring to the drawings the present quick change spindle adaptor 11 for a tool holder assembly, Figure 3, is used in conjunctioll with the power rotated spindle 13, fragmentarily sllown, adapted fcr connection to a power rotated multiple spindle drill head 15 of a machine tool schematically shown. The present quick change spindle adaptor may be used upon a single power driven spindle, but in most systems i9 employed in conjunction with high volume multiple spindle machine tools.
Spindle 13 has a forward end of reduced diameter and a longitudinal bore 19 adapted to receive tool holder 49, Figure 1. Said spindle has a longitudinal keyway 21 therein adapted to receive a Woodruff Key 59 or other key normally mountecl upon the tool holder.
The syindle 13 sometimes referred to as having a forward e~
includes a conical recess 23 within its inner bore surface at its forwarcl erld deEining a conical bearln~. The conical recess 23 OpellS Eorwa-dly and outwarclly. The lncluded allgLe beLween opposite sides oE the conical bearing, Figure 3, is 50, approximately, in the illustrative embodiment.
Sleeve 25 is mo~mted over spindle 13 at its forwarcl end alld i6 secured in position by the radial set screw 27. Said set screw extends through a radial ayerture 29 in sleeve 25 and is threaded at 31 into spindle 13, Figures 3 and 5.
60,lg9-065 In the modlfication shown in Figure 6, the set screw 27' has a button head adapted to operatively engage the normally convex thrust washer 30 within sleeve 25 and bearing against spindle 13. The l~utton head is held in compression to more firmly retain said sleeve.
A pair oE annular grooves 33 are formed within sleeve 25 adapted to receive locking rings 35 and 37, Figures 3 and 6. Amlular outer shell 39 is rotatively positioned upon sleeve 25 and i-ncludes an internal annular flange 4l in engagement with said sleeve. Said flange upon its opposite sides is retainingly engaged by the lock rings or snap rings 35 and 37. This provides a means of rotatably mounting the ouler shell 39 upon sleeve 25 and restraining said sleeve against relative longitudinal movements.
The forward end of the outer shell 39 terminates in the nut 43 which is interiorally threaded at 45 throughout 360, with the exception of a paLr of 180 axial windows 47 therein Figure 4.
The present tool holder assembly is generally indicated at 49, Figures l and 3~ sometimes reEerred to as a true tapered collet chuck holder assembly for supportlvely mounting the tool T which may be a drill, a reamer or a counter boring tool, fragmentarily shown :in Figure :L. The tool holder afi6embly includes annular body 5l intermediate its ends upon which are arranged a pair oE opposed l80 related thread segments 53, Figures l and 2. Thread segments 53 are adapted Eor registry wLthil1 nut windows ~7 and with the interior threads 45 of nut 43, Figure 3. In such assembly as the tool holder 49 is assembled luto the bore of spindle 13 the corresponding opposed thread segments 53 are axially projected into and through the axial windows l!7 in nut 43 whlcl is a part of outer shell 39.
60,199-~65 ~2~
Tool holder 49 includes elongatecl cylindrical shank 55 which extends to one end thereof and is adapted for a slidtng projection into the forward end of the corresponding bore 19 of the spindle. Annular centering cone 57 is formed upon the tool holder forwardly of shank 55 and adjacent the annular body 51 and thread segments 53. The centering cone surfaces define and includecl angle of 50, approximately, corresponding to the included angle between the corresponding opposed walls of conical recess 23 formed in the forward end of syindle 13.
Centering cone 57 is complimental to conical recess 23 and adapted ~or cooperative SIlUg nesting and axial assembly thereinto, Figure 3.
In the basic assembly using the conical bearing surface 23 and the centering cone 57, said cone is designed to seat solidly against the spindle face. The independent movement of the lock in cone 57 permits proper clamping on the center line of the spindle utilizing the present quick change spindle adaptor and including the nut 43.
The positive drive assembly 63 is threaded into the bore 61 and is adapted to operatively engage the tang 71 upon the inner encl oF
tool T for a driving relation therebetween. By lon~itudinally adjustillg the yositive drive assembly 63 relative to bore 61 the extension oE tool T from the outer end oE the tool holder may be ad~uste~d.
The bocly extenaion 65 of the tool holder 49 is exteriorally threaded. There is mountecl thereon a con~entional threaded nose piece 67 which mounts a conventional split collet assembly 69 adapted to clxially grip the tool T, frag~tentarily shown which may be a drlll, a counter boring tool, a reamer or other tool. Such tool is normally arranged UpOII
the longitudinal axis of tool holder 49 and secured thereitl upon the 60,199-065 tightening of nose piece 67 in an conventional malmer. Its descrLption is not repeated herein.
As shown in Figure 3, a chip guard 73 of flexible material such as rubber includes an annular mount sleeve 75 which surrounds the tool holder body extension 65. Portions of the chip guard extend radially outward and terminate in the tapered amlular flange 77 in operative wiping and seaLing engagement with the outer shell and nut assembly 39. The chip guard serves to exclude chips, debris and lubricants from the interior of the nut assembly, spindle and spindle adaptor.
The protective boot 79 of cylindrical shape, Figure 5, is mounted around outer shell 39 and is constructed of Elexible material such as rubber. The boot extends over an exposed portion of sleeve 25 and includes radial wall 81 apertured to cooperatively register witll the forward end of spindle 13. Boot 79 protectively seals and encloses outer shell 39, sleeve 25 and the spindle to exclude chips, debris and lubricant from the interior of the quick change adaptor, from the nut assembly and from the spindle.
In the modification shown in FLgures 7 and 8 there i.9 ShOW!I a tool holder shaft 83 of general construction wh;ch -is exterioralLJr threaded at 85 over which a nut 87, lllternally thrended at 8~, is threaded, and secured as by a set screw 27 and includes a pair of L8~
related thread segments 91 adapted for use in conjunctioll with tlle adaptor assembly of Figure 6.
The quick change spindle adaptor, sho~l in Figure fi, i5 substantially the same as above described with respect to Figure 5 e~cept that the sleeve 25 has been elongated. The spindle element L3 receiYing 60,199-065 sleeve 25 is longer. There is the longitudillal ~ore 19 axially oE
spindle 13 to receive a tool holder~ There is no centering cone as shown at 23 in Figure 5. The spindle adaptor assembly 39, 25 shown in Fi~ure 6 may be used with other types of tool holders which have different means for effecting an alignment between the tool holder and the spindle.
All that is required is that the tool holder shank 83 in Figures 7 and 8 is exteriorly threaded at 85 to receive the nut 87 having the threaded bore 89, secured in position upon the shaft 83 by set screw 27. The adaptor assembly including outer shell 39 and nut 43, 45 retained on sleeve 25 cooperatively receives the pair of opposed thread segments 91 upon nut 87 in the same manner as above described relative to Figures 3, 4 and 5. Here also the corresponding thread segments 91 are initially assembled axially into the corresponding windows 47 of the nut 43 UpOIl the quick change adaptor outer shell 39 and thereafter the nut 45 is rotated a limited distance as for example up to 90 more or less, or such sufficient angle as to fixedly anchor the tool holder to the spindle.
This is effective for securing the tool holder and in axial alignment within and upon the power rotated spindle.
With the present quLck change spindle adaptor challges i~l tooling wilL take Eive (5) seconds as compared to standard methods taking upon to two (2) mLnutes.
Claims (21)
1. A tool holder and quick change spindle adaptor for a power driven spindle having an axial bore and a forward end;
a tool holder having a shank at its inner end axially projected into and keyed to said spindle;
a sleeve mounted upon the spindle;
means to secure the sleeve on the spindle;
an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an interiorly threaded nut upon said shell arranged forwardly of said spindle;
a conical recess within the inner bore surface at the forward end of said spindle defining an axial bearing;
a centering cone on and around said tool holder intermediate its ends and forwardly of said shank in snug operative and axial registry with said axial bearing for maintaining an axial self alignment of said tool holder and spindle; and threaded means upon said tool holder forwardly of said centering cone, threadedly engaged by said nut for axially anchoring said tool holder upon said spindle and for biasing said centering cone into continuous inward engagement and nesting within said spindle bearing.
a tool holder having a shank at its inner end axially projected into and keyed to said spindle;
a sleeve mounted upon the spindle;
means to secure the sleeve on the spindle;
an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an interiorly threaded nut upon said shell arranged forwardly of said spindle;
a conical recess within the inner bore surface at the forward end of said spindle defining an axial bearing;
a centering cone on and around said tool holder intermediate its ends and forwardly of said shank in snug operative and axial registry with said axial bearing for maintaining an axial self alignment of said tool holder and spindle; and threaded means upon said tool holder forwardly of said centering cone, threadedly engaged by said nut for axially anchoring said tool holder upon said spindle and for biasing said centering cone into continuous inward engagement and nesting within said spindle bearing.
2. In a spindle adaptor and tool holder assembly including a power rotated spindle having a bore and a forward end adapted to receive a tool holder, a sleeve mounted upon the spindle, means to secure the sleeve on the spindle, the tool holder assembly including a tool holder mounting a tool and having a shank at its inner end slidably projected into the spindle bore and keyed to said spindle;
the improvement comprising a conical recess within the inner bore surface at the forward end of said spindle defining a conical bearing;
a centering cone upon and around said tool holder forwardly of said shank, in snug and axial registry with said bearing, maintaining an axial self-alignment of said tool holder and spindle;
an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an internally threaded nut upon said shell arranged forwardly of said spindle; and threaded means upon said tool holder forwardly of said centering cone threadedly engaged by said nut for axially anchoring said tool holder upon said spindle and for biasing said centering cone into continuous inward engagement and nesting within said spindle bearing.
the improvement comprising a conical recess within the inner bore surface at the forward end of said spindle defining a conical bearing;
a centering cone upon and around said tool holder forwardly of said shank, in snug and axial registry with said bearing, maintaining an axial self-alignment of said tool holder and spindle;
an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an internally threaded nut upon said shell arranged forwardly of said spindle; and threaded means upon said tool holder forwardly of said centering cone threadedly engaged by said nut for axially anchoring said tool holder upon said spindle and for biasing said centering cone into continuous inward engagement and nesting within said spindle bearing.
3. In the quick change spindle adaptor of claim 1, the securing means for said sleeve including a radial set screw extending through said sleeve and threaded into said spindle.
4. In the quick change spindle adaptor of claim 3, there being a radial bore in said outer shell for access to said set screw.
5. In the quick change spindle adaptor of claim 1, the retaining means for said outer shell including a pair of spaced snap rings anchored within annular channels in said sleeve retainingly engaging inner and outer portions of said outer shell.
6. In the quick change spindle adaptor of claim 1, said outer shell having an internal annular mount flange bearing against said sleeve;
the retaining means for said shell including a pair of spaced snap rings anchored within annular channels in said sleeve retainingly engaging opposite sides of said mount flange.
the retaining means for said shell including a pair of spaced snap rings anchored within annular channels in said sleeve retainingly engaging opposite sides of said mount flange.
7. In the quick change spindle adaptor of claim 1, said threaded means including an annular body upon said tool holder forwardly of said centering cone; and a pair of threaded segments upon said body spaced apart by 180 degrees threadedly received by said nut.
8. In the quick change spindle adaptor of claim 7, said nut having a pair of axial windows spaced apart by 180 degrees to axially receive said threaded segments.
9. In the quick change spindle adaptor of claim 1, an annular chip guard of flexible material having a sleeve mounted upon and surrounding said tool holder and including an enlarged tapered annular flange engaging said nut for excluding chips, debris and lubricants from the interior of said nut, adaptor and spindle.
10. In the quick change spindle adaptor of claim 1, and an annular boot of flexible material mounted over said outer shell and over said sleeve and having an annular flange engaging said spindle for excluding chips, debris and lubricants from the interior of said nut, adaptor and spindle.
11. In the spindle adaptor of claim 2, the securing means for said sleeve including a radial set screw extending through said sleeve and threaded into said spindle.
12. In the spindle adaptor of claim 2, there being a radial bore in said outer shell for access to said set screw.
13. In the spindle adaptor of claim 2, the retaining means for said shell including a pair of spaced snap rings anchored within annular channels in said sleeve retainingly engaging inner and outer portions of said shell.
14. In the spindle adaptor of claim 2, said outer shell having an internal annular mount flange bearing against said sleeve;
the retaining means for said shell including a pair of spaced snap rings anchored within annular channels in said sleeve retainingly engaging opposite sides of said mount flange.
the retaining means for said shell including a pair of spaced snap rings anchored within annular channels in said sleeve retainingly engaging opposite sides of said mount flange.
15. In the spindle adaptor of claim 2, said threaded means including an annular body upon said tool holder forwardly of said centering cone; and a pair of threaded segments upon said body spaced apart by 180 degrees threadedly received by said nut.
16. In the spindle adaptor of claim 15, said nut having a pair of axial windows spaced apart by 180 degrees to axially receive said threaded segments.
17. In the spindle adaptor of claim 2, an annular chip guard of flexible material having a sleeve mounted upon and surrounding said tool holder and including an enlarged tapered annular flange engaging said nut for excluding chips, debris and lubricants from the interior of said nut, adaptor and spindle.
18. In the quick change spindle adaptor of claim 2, and an annular boot of flexible material mounted over said outer shell and over said sleeve and having an annular flange engaging said spindle for excluding chips, debris and lubricants from the interior of said nut, adaptor and spindle,
19. A tool holder and quick change spindle adaptor for a power driven spindle having an axial bore and a forward end;
a tool holder having a shank at its inner end axially projected into and keyed to said spindle;
a sleeve mounted upon the spindle;
means to secure the sleeve on the spindle;
an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an interiorly threaded nut upon said shell arranged forwardly of said spindle;
cooperating means on said spindle and tool holder for maintaining an axial self alignment of said tool holder and spindle; and threaded means upon said tool holder threaded engaged by said nut on rotation thereof for axially anchoring said tool holder upon said spindle.
a tool holder having a shank at its inner end axially projected into and keyed to said spindle;
a sleeve mounted upon the spindle;
means to secure the sleeve on the spindle;
an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an interiorly threaded nut upon said shell arranged forwardly of said spindle;
cooperating means on said spindle and tool holder for maintaining an axial self alignment of said tool holder and spindle; and threaded means upon said tool holder threaded engaged by said nut on rotation thereof for axially anchoring said tool holder upon said spindle.
20. In the spindle adaptor of claim 3, said set screw having a button head; and a normally convex washer within said sleeve bearing against said spindle and receiving said button head in compression.
21. In a spindle adaptor and tool holder assembly including a power rotated spindle having a bore and a forward end adapted to receive a tool holder, and a sleeve mounted upon the spindle and means to secure the sleeve on the spindle;
the tool holder assembly including a tool holder mounting a tool and having a shank at its inner end slidably projected into the spindle bore and keyed to said spindle;
cooperating means on said spindle and tool holder for maintaining an axial self alignment of said tool holder and spindle;
the improvement comprising an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an internally threaded nut upon said shell arranged forwardly of said spindle; and threaded means upon said tool holder engaged by said nut for axially anchoring said tool holder upon said spindle.
the tool holder assembly including a tool holder mounting a tool and having a shank at its inner end slidably projected into the spindle bore and keyed to said spindle;
cooperating means on said spindle and tool holder for maintaining an axial self alignment of said tool holder and spindle;
the improvement comprising an outer shell rotatably mounted upon said sleeve;
means to retain the shell against longitudinal movement;
an internally threaded nut upon said shell arranged forwardly of said spindle; and threaded means upon said tool holder engaged by said nut for axially anchoring said tool holder upon said spindle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/124,035 | 1987-11-23 | ||
| US07/124,035 US4834596A (en) | 1987-11-23 | 1987-11-23 | Quick change spindle adaptor for tool holder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1295160C true CA1295160C (en) | 1992-02-04 |
Family
ID=22412377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000582872A Expired - Lifetime CA1295160C (en) | 1987-11-23 | 1988-11-10 | Quick change spindle adapter for tool holder |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4834596A (en) |
| CA (1) | CA1295160C (en) |
| DE (1) | DE3839738A1 (en) |
| GB (1) | GB2212744B (en) |
Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3902874A1 (en) * | 1989-02-01 | 1990-08-09 | Fein C & E | ADAPTER FOR ATTACHING AN ADDITIONAL TOOL |
| US5032043A (en) * | 1990-06-28 | 1991-07-16 | T. M. Smith Tool International Corporation | Spindle adapter for tool holder with tool adjustment control |
| DE9015155U1 (en) * | 1990-11-03 | 1991-01-31 | Trumpf Gruesch Ag, Gruesch, Ch | |
| ES2067364B1 (en) * | 1992-06-02 | 1997-02-16 | Margareto Juan Fernandez | FIXING SYSTEM OF KNIFE HOLDER IN TUPI MACHINES AND MOLDING MACHINES FOR THE WORK OF WOOD. |
| US5372465A (en) * | 1993-04-20 | 1994-12-13 | T. M. Smith Tool International Corp. | Quick change spindle adaptor for tool holder |
| IL106697A (en) * | 1993-08-15 | 1996-10-16 | Iscar Ltd | Cutting insert with integral clamping means |
| US5607269A (en) * | 1995-11-21 | 1997-03-04 | Osteotech, Inc. | Bone milling apparatus |
| US5704738A (en) * | 1996-05-17 | 1998-01-06 | Sugino; Shigeru | Tool attachment assembly |
| GB9718312D0 (en) | 1997-08-30 | 1997-11-05 | Black & Decker Inc | Power tool |
| US6551037B2 (en) * | 1997-12-12 | 2003-04-22 | Black & Decker Inc. | Removable chuck |
| US6550786B2 (en) * | 1997-12-12 | 2003-04-22 | Black & Decker Inc. | Removable chuck |
| DE19810911A1 (en) * | 1998-03-13 | 1999-09-16 | Hilti Ag | Drilling tool |
| US6270086B1 (en) | 1998-08-13 | 2001-08-07 | Don R. Lloyd | Collet actuator for tool holder |
| DE19907026A1 (en) * | 1999-02-19 | 2000-08-24 | Komet Stahlhalter Werkzeug | Device for detachably connecting tool to machine spindle includes tensioning mechanism with operating nut screwed onto externally threaded connecting sleeve and converting axial movement to radial movement of tension element |
| CH695357A5 (en) * | 2002-01-29 | 2006-04-13 | Wasag Tool Ag | Arrangement for releasable attachment of a rotatable tool to a drive spindle. |
| US6939213B2 (en) * | 2002-03-25 | 2005-09-06 | Lhr Technologies, Inc. | Quick change adaptor for rotary machines |
| AT413420B (en) * | 2002-06-07 | 2006-02-15 | Techmo Entw & Vertriebs Gmbh | METHOD AND ARRANGEMENT FOR BREAKING CONNECTING AND RELEASING COMPOUND ELEMENTS |
| US7144355B2 (en) * | 2002-07-03 | 2006-12-05 | Toshiba Kikai Kabushiki Kaisha | Tool replacement method and nut driver for machine tools |
| US6811364B2 (en) | 2002-09-23 | 2004-11-02 | Ken Kelzer | Quick connecting threaded coupler |
| US20060088393A1 (en) * | 2004-10-26 | 2006-04-27 | Cooper Vincent P | Extended sleeve removable chuck |
| US8172642B2 (en) | 2008-08-20 | 2012-05-08 | Black & Decker Inc. | Multi-sander |
| US8292150B2 (en) | 2010-11-02 | 2012-10-23 | Tyco Healthcare Group Lp | Adapter for powered surgical devices |
| DE102011078376A1 (en) * | 2011-06-30 | 2013-01-03 | Robert Bosch Gmbh | Handle device, in particular for hand tools |
| US9421682B2 (en) | 2011-07-18 | 2016-08-23 | Black & Decker Inc. | Multi-head power tool with reverse lock-out capability |
| US9138811B2 (en) * | 2011-08-09 | 2015-09-22 | Daniel S. Freilich | Method and apparatus for lathe tool alignment |
| US9956677B2 (en) | 2013-05-08 | 2018-05-01 | Black & Decker Inc. | Power tool with interchangeable power heads |
| US10086424B2 (en) | 2015-10-07 | 2018-10-02 | Admc Holding, Llc | Helix tool locking system |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US869507A (en) * | 1907-10-29 | Alexander J Mcallister | Drill-chuck. | |
| US329545A (en) * | 1885-11-03 | Rock-drill | ||
| GB128003A (en) * | 1918-06-13 | 1919-06-13 | Alfred Herbert | Improvements in or relating to Arbors for Milling-tools or other Cutting-tools. |
| SE127976C1 (en) * | 1944-10-30 | 1950-04-11 | Tool holder for turret and support lathes etc. | |
| US2693965A (en) * | 1948-10-28 | 1954-11-09 | James W Briney | Adjustable coupling |
| US3112117A (en) * | 1960-11-08 | 1963-11-26 | Bridgeport Machines | Geared-key operated jawless quick release chuck |
| US3512793A (en) * | 1967-07-11 | 1970-05-19 | Donald W Botimer | Quick change tool holder |
| DE2243904A1 (en) * | 1972-09-07 | 1974-03-14 | Philipp Zorn | DUST PROTECTION DEVICE FOR DRILLING CHUCK |
| JPS5822613A (en) * | 1981-07-23 | 1983-02-10 | Toshiba Tungaloy Co Ltd | Cutting tool for boring |
| JPS5930635A (en) * | 1982-08-06 | 1984-02-18 | Yamazaki Mazak Corp | Tool holding mechanism |
| US4710079A (en) * | 1985-06-11 | 1987-12-01 | T. M. Smith Tool International Corp. | Quick change spindle adapter for tool holder |
| US4669933A (en) * | 1985-09-06 | 1987-06-02 | Leonard Dye | Chuck for rotary metal cutting tool |
| US4722645A (en) * | 1986-11-28 | 1988-02-02 | No-Ma Engineering Incorporated | Rotatable spindle and tool holding adapter |
-
1987
- 1987-11-23 US US07/124,035 patent/US4834596A/en not_active Expired - Lifetime
-
1988
- 1988-11-10 CA CA000582872A patent/CA1295160C/en not_active Expired - Lifetime
- 1988-11-16 GB GB8826744A patent/GB2212744B/en not_active Expired - Lifetime
- 1988-11-22 DE DE3839738A patent/DE3839738A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| US4834596A (en) | 1989-05-30 |
| DE3839738A1 (en) | 1989-06-01 |
| GB2212744B (en) | 1992-02-19 |
| GB8826744D0 (en) | 1988-12-21 |
| GB2212744A (en) | 1989-08-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |