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Publication numberUS2576298 A
Publication typeGrant
Publication dateNov 27, 1951
Filing dateMar 31, 1949
Priority dateMar 31, 1949
Publication numberUS 2576298 A, US 2576298A, US-A-2576298, US2576298 A, US2576298A
InventorsJoseph S Kessler
Original AssigneeTri Clover Machine Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Shaft keying and locking construction
US 2576298 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Nov. 27, 1951 J. 5. KESSLER 27,576,298-

-- SHAFT'KEYING AND LOCKING CONSTRUCTION Filed March 51, 1949 IN VEN TOR.

y A. m

Patented Nov. 27, 1951 SHAFT KEYING AND LOCKING CONSTRUCTION Joseph S. Kessler, Kenosha, Wis, :assignor to Tizi- GloverzMalchine (1a., Kenosha, Wis., @a corporation-cf Wisconsin Application March 31, 1949, Serial No. 84301 I This invention relates to improvements in shaft keying and locking constructions.

There are many applications wherein it desired to removably fix a member, such as animpeller, gear, or the like, onto a driving shaft. Heretofore it has been customary to key the impeller :or like member to the shaft. This .served to prevent rotation of the member on the shaft, but it did not alone prevent relative axial movement. As a'result, it has been customary to utilize additional meanssuch as a cotter pin or nut.

'-In certain equipment, such as that used .in the food industry, it is of utmost'importance that the use :of inaccessible "irregularities such as holes, screw threads, corners, grooves and the like, which might form a lodging place for food particles, be minimized. It is also important that this type of equipment be designed :for quick and easy disassembly and cleaning.

With the above in mind, it is a general object of the invention to provide a novel construction for simultaneously keying an impeller or the like to a .shaft and for locking said impeller against axial movement. A further object of the invention is to provide a construction of the class described which :permits an impeller. or the like to be .readily and quickly mounted on or removed from a shaft.

Another object of the invention is to provide an improved construction of the class described having a keying and locking member which is formed with a key portion and with a resilient snapring portion, the last-mentioned of which may be manually snapped into or out of operative position when the key portion is in place, said snap ring portionserving to prevent displacement of said keying portion, as well as to prevent displacement of the impeller.

A further object of the invention is to provide a construction of the class described which is easily cleaned and which a has no inaccessible corners, holes or screw threads in which food .partic-les may collect.

A further object of the invention is to provide a construction of the class described which is simple in construction, strong and reliable, and easy to manufacture.

With the above and other objects in view, 'the invention consists of the improved. keying and locking means, and :all of its parts and combinations, as set forth in the claims, and all equivalents thereof.

9 Claims. (Cl. 2.87-53-) In the drawing accompanying and :forming a the invention, and wherein the'isam'e reference characters indicate the same in all :of the views: .Fig. 1 is a fragmentary side viewof an impeller showing "it keyed and locked-onto a s'haftby means of one form of "improved keying andlocking member, parts being broken away; Fig. 2 is a fragmentaryendview taken approximately along the line 2-2 of Fi'g'. i, the not and dash lines illustrating the keying -and locking member in a releasedposition; 7 Fig. his a perspective viewof the improvedkeying and locking rnemberof Figs. '1' and 2 s'ho'virl'l alone;

Fig. 4 is a perspective view 'of :a modified form of improved keying and locking member; and

Fig. 5 is a fragmentary "end view similar to Fig. 2 but showing the modifiedform of keying and locking member in both locking and released position.

Referring more particularly to the drawing;

the numeral '5 indicates-a shaft which amayhavean end portion 6 of reduced diameter :toro'rm a shoulder 1. The numeral sindicates an impeller or other device having a hub =9 formed-with 'a smooth, unthrea-ded bore H) which is of substantially the same diameter as the portion 6 of the shaft 5. The impeller B is positioned on the por' tion t of the shaft 5 with one end of the in abutment with theshoul-d'er 'l.

The portion 8 of the shaft 5 is-formed with a jacent the outer face-of the hub 9, is formedwith.

a circumferential groove 13, which may communicate. with the groove H. If desired, the groove It may extend completely around the shaft 5, but satisfactory results have been obtained with a groove is which terminates at about the point M shown in Fig. 2. This point is .located -.substantially more than 180 from the groove M in a counterclockwise direction (as viewedinFig.2). I

.An improved keying and locking member 18 is formed with a cylindrical stem or key portion l5 having a diameter substantially equal to the diameter ofthe cylindrical cavity formed by the registering grooves H and 12. The member 48 is also preferably formed with integral lock ing clip or snap ring M5- having sprin-g-l-ike qualihub -9 ties and which is connected to one end of the key 15. The clip It extends in a plane substantially at a right angle to the axis of the shaft and the key I5 and is substantially c-shaped as shown. The clip I6 has a radius of curvature preferably equal to or smaller than that of the groove l3. At its free end the clip I6 is formed with a handle portion H.

To install the keying and locking member IS, the grooves II and I2 of the shaft 5 and the hub 9 respectively are positioned in registration, and the cylindrical key I5 is slidably inserted into the cylindrical cavity formed by said grooves with the clip I6 thereof in the dot and dash line position of Fig. 2. After the key I5 has been inserted sufficiently far to bring the clip I6 into the same plane as the peripheral groove I3 on the shaft 5, the clip I6 is swung toward the shaft 5 and into the groove I3. During such movement the clip I6 swings about the key I5 as a pivot. Since the radius of curvature of the clip I6 is equal to or smaller than that of the groove I3 it will be spread apart slightly as it is snapped into the position on the shaft 5, which is shown in' Fig; 2. This snapping action holds the member I 4 in operative position and prevents its dis placement.

When the improved keying and locking device isin the operative position shown in Figs. 1 and 2, it effectively prevents rotation of the hub 9 relative to the shaft 5, and it also efiectively'prevents axial movement of the hub 9 relative to said shaft. The latter is true because when the clip I Ii is seated in the groove I3, it abuts the outer face of the hub 9 and prevents outward movement thereof.

'To remove the keying and locking member I8 from its operative position it is only necessary to snap the clip I6 off of the shaft 5 by grasping the handle I! of said clip and swinging it to the V-shaped retaining clip also having spring-like qualities and which is connected to one end portion of a key I5. The clip I6 extends in a plane substantially at a right angle to the axes of the shaft 5 and the key I5, and has a substantially straight leg I9 and a leg 20 which is formed with an arcuate portion 2I. preferably has a radius of curvature substantially equal to that of the groove I3. At its free end the clip I6 is formed with a handle portion H.

The looped portion 22 formed at the juncture of legs I9 and 20 provides the tensioning required to urge said legs toward each other when said legs are forced outwardly, as for example when the clip I8 is in installed position on the shaft 5. When the clip I8 is removed from the shaft the legs I9 and 20 are preferably disposed at a smaller angularity than when said clip is in looking position on the shaft.

When the member I8 is in keying and locking position, the arcuate portion 2| of the clip I6 engages a portion of the groove I3 diametrically opposite from the grooves II and I2. The installation and removal of the modified form of keying and locking member I8 is substantially the same as that of the member I8. Fig. 5 shows The arcuate portion 2| the member. I8 in keying and locking position, and the dot and dash lines in said figure show the clip I6 swung free of the shaft 5 and in position to permit withdrawal of the key I5.

It is apparent that the invention provides a simple construction for positively fixing an element, such as an impeller, to a shaft. The improved construction is especially well adapted for use in the food industry because it does not require the use of any screw threading either onthe shaft or on the element fixed thereto. In addition, the improved construction eliminates inaccessible sharp corners and holes in which food particles may collect. All of the grooves in the improved construction are smooth, rounded, and easily cleaned, and the improved keying and lockingmember I4 is also of a shape which simplifies the cleaning operation.

Various changes and modifications may be made without departing from the spirit of the invention, and all of such changes are contemplated, as may come within the scope of the claims. I

What I claim is: I 1. In combination, a shaft formed with a key' way; an element having a bore within which said shaft is positioned, said element having a complementary keyway formed inlsaid bore, said shaft being formed with a circumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member having a stem forming a key rotatably and removably positioned in said complementary keyways and having an elongated snap portion connected at one extremity to said stem, said snap portion being positioned in said circumferential groove adjacent the end portion of said bored element, said latter portion being swingable upon rotation of said stem to a position out of said groove and away from said shaft to permit removal of said stem from said keyways.

2. In combination, a shaft formed with a substantially semi-cylindrical keyway; an element having a bore within which said shaft is positioned, said element having a complementary substantially semi-cylindrical keyway formed in said bore and said shaft being formed with a circumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member formed with a substantially cylindrical keying portion removably positioned in said complementary keyways and having an elongated shaft embracing portion connected to one extremity to said keying portion and removably positioned in said circumferential groove adjacent the end portion of said bored element.

3. In combination, a shaft formed with a keyway; an element having a bore within which said shaft is positioned, said element havin a complementary keyway formed in said bore and said shaft being formed with a circumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member formed with a keying portion removably positioned in said complementary keyways and having a c-shaped snap-ring portion connected at one extremity to said keying portion and removably positioned in said circumferential groove adjacent the end portion of said bored element.

4. In combination, a shaft formed with a keyway; an element having a bore within which said shaft is positioned, said element having a complementary keyway formed in said bore and said shaft being formed with a circumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member formed with a keying portion rotatably and removably positioned in said complementary keyways and having a G-shaped snap-ring portion fixed at one extremity to said keying portion and removably positioned in said circumferential groove adjacent the end portion of said bored element, said C-shaped snap-ring portion being swingable out of said groove and away from said shaft upon rotation of said keying portion.

5. In combination, a shaft formed at one end with a substantially semi-cylindrical keyway and with a circumferentially extending groove; shoulder means on said shaft spaced inwardly from said end thereof; an element having a bore within which said shaft is positioned with said shoulder means in abutment with one end of said element and with the circumferentially extending groove outwardly of and adjacent the other end of said element, said element having a complementary substantially semi-cylindrical keyway formed in said bore; and a keying and locking member formed with a substantially cylindrical keying portion removably positioned in said complementary keyways and having a snap-ring portion,

fixed at one extremity to said keying portion and removably positioned in said circumferential groove in embracing relationship with respect to said shaft and in abutment with the adjacent end portion of said bored element, whereby said element is locked against both rotative and axial movement relative to said shaft.

6. In combination, a shaft formed with a keyway; an element having a bore within which said shaft is positioned, said element having a complementary keyway formed in said bore and said shaft being formed with a ciroumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member formed with a keying portion removably positioned in said complementary keyways and having a V-shaped retaining clip, having the extremity of one of its legs connected to said keying portion said clip having an arcuate portion removably positioned in said circumferential groove diametrically opposite said shaft keyway.

7. In combination, a shaft formed with a keyway; an element having a bore within which said shaft is positioned, said element having a complementary keyway formed in said bore and said shaft being formed with a circumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member formed with a keying portion removably positioned in said complementary keyways and having a V-shaped retaining clip, said clip having a substantially straight first leg connected at its extremity to said keying portion and having a second leg formed with an arcuate portion,

said arcuate portion being removably positioned v in said circumferential groove in abutment with the end portion of said bored element. I

8. In combination, a shaft formed with a keyway; an element having a bore within which said shaft is positioned, said element having a complementary keyway formed in said bore and said shaft being formed with a circumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member formed with a keying portion removably positioned in said complementary keyways and having a V-shaped retaining clip, said clip having a substantially straight first leg fixed at the extremity thereof to said keying portion and having a second leg formed with an arcuate portion having a radius of curvature substantially equal to that of the circumferential groove, said arcuate portion being removably positioned in said circumferential groove diametrically opposite said shaft keyway and in abutment with the adjacent end portion of the bored element.

9. In combination, a shaft formed with a keyway; an element having a bore within which said shaft is positioned, said element having a complementary keyway formed in said bore and said shaft being formed with a circumferentially extending groove outwardly of and adjacent one end of said element; and a keying and locking member formed with a keying portion removably positioned in said complementary keyways and having a V-shaped retaining clip, said clip having a substantially straight first leg fixed at its extremity to said keying portion and having a second leg formed with an arcuate portion having a radius of curvature substantially equal to that of the circumferential groove, said arcuate portion being removably positioned in said circumferential groove diametrically opposite said shaft keyway and in abutment with the adjacent end portion of the bored element, the angular relationship of the first and second legs of said clip when removed from the shaft being normally equal to or less than the angular relationship of said legs when said clip is in locking position on said shaft.

JOSEPH S. KESSLER.

REFERENCES SITE!) The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,017,371 Beck Feb. 13, 1912 FOREIGN PATENTS Number Country Date 1,204 Great Britain Jan. 16, 1914

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1017371 *Jul 6, 1911Feb 13, 1912Larkin BeckLock-nut.
GB191401204A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2643139 *Mar 22, 1951Jun 23, 1953Airtron IncQuickly operable conduit clamp
US2803416 *Jun 4, 1954Aug 20, 1957Gen ElectricResilient mounting
US2873128 *Jun 25, 1954Feb 10, 1959Fafnir Bearing CoLocking means for securing a bearing to a shaft
US3235953 *Jan 18, 1965Feb 22, 1966Chrysler CorpMethod of assembling steering gear
US3752514 *Sep 11, 1970Aug 14, 1973Atlas Copco AbSocket retaining means
US4325467 *Nov 3, 1980Apr 20, 1982Shimano Industrial Company LimitedBicycle which facilitates wheel removal
Classifications
U.S. Classification403/247, 411/516, 29/453, 411/928, 411/939
International ClassificationF16B21/12, F16B2/24, F16B21/18
Cooperative ClassificationF16B2/248, Y10S411/928, F16B21/186, Y10S411/939, F16B21/12
European ClassificationF16B21/12, F16B2/24C, F16B21/18C