US 2750204 A
Description (OCR text may contain errors)
June 12, 1956 w. R. OHRMANN SIDE BRACE FOR HYDRAULIC STACKERS 2 Sheets-Sheet 1 Fil ed March 5, 1954 IN V EN TOR. WILL/A M 'R. OHIINAAW fund M June 12, 1956 w. R. OHRMANN SIDE BRACE FOR HYDRAULIC STACKERS 2 Sheets-Sheet 2 Filed March 5, 1954 A RNE T United States Patent SIDE BRACE FOR HYDRAULIC STACKERS William R. Ohrmann, Drummond, Mont.
Application March 5, 1954, Serial No. 414,476
1 Claim. (Cl. 280-150) This invention relates to stacking machines and more particularly to means for stabilizing the same.
The principal object of the present invention is to provide wing structures upon the opposite sides of a conventional hydraulic stacker, which while permitting free movement of the stacker, when in the act of collecting a load, can be regidified when the act of elevating the load on to a stack is to be effected, and this to the end that the stacker will be prevented from tipping toward one side or the other, which frequently occurs now without such stabilizing means.
Another important object of the invention is to provide stabilizing means of the character stated for stackers, which is of simple construction and not susceptible to the ready development of defects.
Another object of the invention is to provide stabilizing means for stackers, which is positive acting and not susceptible to the ready development of defects.
These and various other objects and advantages of the invention will become apparent to the reader of the following description.
In the drawings:
Figure 1 is a front elevational view of a stacker and associated tractor, equipped with the present invention, parts of which are shown in elevation and parts in section.
Figure 2 is a fragmentary top plan view showing a portion of the stacker frame and tractor in conjunction with the present invention.
Figure 3 is a fragmentary perspective view showing the structure of the present invention at one side of the stacker.
Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral generally refers to a tractor for effecting movement of a stacker and in the drawings numeral 11 generally refers to the stacker frame.
The tractor 10 has side chassis members 12, 12 while the stacker has horizontal side frame members 13, 13 and a super frame 14 having a horizontal top member 15 supported by vertical side members 16, 16.
The tractor 10 is of the usual construction and has a hitch 16 between the rear end thereof and the tractor chassis.
In carrying out the present invention two wing stabilizing units 17, 17 are employed. Each of these units consists of an arm 18, the inner end of which pivotally connects to a clevis 19 and this clevis 19 in turn is supported by a vertical pin 20 carried by a bracket 9 secured to the stacker frame 11, as suggested in Figures 1 and 2.
Numeral 21 denotes a stabilizer Wheel which is mounted Within a fork 22 having an upstanding pintle 23, this pintle extending upwardly through a bearing 24 at the outer end of the arm 18. The forward side of the arm 18 has a lug 25 projecting therefrom and overlapping this lug is a yoke 26 through which a pin 27 is disposed for pivotally connecting the yoke 26 to the lug 25. The yoke 26 has an elongated shank 28 formed with a plurality of openings 29 therein at the forward portion thereof and this apertured portion of the shank 28 extends telescopically within an elongated barrel 30. A pin or cotter-key 31 can be disposed through an opening in the rear end of this barrel 3,0 and through the desired opening 29 of the shank 28.
' The forwardend of the barrel 39 has an opening there: in to receive a pin or bolt 32 which extends not only through the opening in the barrel but also through openings in a yoke 33 and this yoke is provided with a stub shaft 34 operating within a bearing or opening in the corresponding side member 12 of the tractor chassis. In other words this assembly made up of the parts 30, 32, 33 and 34 make up a universal coupler.
As is understood, these side stabilizing units 17 are hydraulically controlled and in this connection a hydraulic fluid reservoir 35 is suitably secured as at 36 to the super frame member 15 of the stacker frame 11.
A cylinder 37 provided with a valve plunger 38 therein, depends from the reservoir 35 and is in communication therewith. Numeral 39 denotes a filler head for the reservoir 35.
Numeral 40 denotes a hand lever which has a pivotal connection 41 with the valve plunger 38 and is connected at one end by a pivot 42, with a lug at the lower end of the cylinder 37. These parts are arranged so that when the lever 48 is pushed upwardly at its free end, the valve plunger 38 will be moved upwardly so as to close off a pair of outlets 43, 44 from which extends flexible conduits 45, 46 respectively. Any desired means may be employed for securing the conduits 45, 46 to the super structure of the stacker frame 11.
The super frame 11 at each side thereof has a clevis 47 in which is swingably mounted on a horizontal plane, a yoke 48 which embraces and is pivotally secured to a lug 49, as at 50 and this lug projects from a hydraulic cylinder 51 in which a piston 52 is operable. Extending from the piston 52 and through a packing 53 is a rod 54 which pivotally connects as at 55 to a lug at the juncture of the arm 18 with the stabilizer wheel bearing 24.
It can now be seen, that normally the lever 40 is in the lowered position shown in Figure 1 and this is desired when the tractor is pushing the stacker along afield for the collection of whatever material is to be loaded.
When the rake loaded with material has been brought to the stack, the present invention is brought into play. Prior to this, the stabilizing wheels 21 are free to raise and lower as a machine travels over unlevel terrain, due to the ability of the fluid in the system to move back and forth. For instance Figure 1 shows one of the stabilizer wheels higher than the other and of course this means that some of the fluid from the corresponding hydraulic cylinder 51 has been displaced and has moved into the reservoir 35.
However, when the stack has been reached, it is desired to fix the stabilizing wheels 21 upon the ground and this is accomplished by moving the lever 40 (see Figure 1) upwardly to close off the outlets 43, 44 and thus the sta bilizing wheels are hydraulically locked upon the ground, so that when the rake is elevated for the placement of the loaded material upon a stack, no tipping toward one side or the other of the machine will occur.
While the foregoing description sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.
Having described the invention what is claimed as new is:
Stabilizing means for stackers including a stacking machine, side stabilizing units mounted to the machine, each of said units including an arm having its inner end pivotally connected to the machine, a stabilizing wheel car 3 ried by the outer end of each arm and hydraulic means the valve cylinder, said valve being operative to close 0E between the arms for permitting free action of the arms, the outlets and maintain the fluid in the conduits intact to or hydraulically locking the arms in fixed ground engagprevent any action of the arms and stabilizing wheels. ing position to prevent tilting of the machine when a load is being lifted, said hydraulic means between the arms 5 References Cited 111 the file of fills 19 consisting of a hydraulic cylinder for each of the arms, a UNITED STATES PA hydraulic line extending from each of the cylinders, a valve cylinder to which the conduits connect, a valve elek23 i: g3 ment 1n the cylinder, manual means for operating the 2,663,266 Baldwin Dec 22, 1953 valve element, a fluid reservoir in communication with 10