US2672994A - Hydraulic implement control unit - Google Patents

Description

1954 A. J. WERNER ET AL HYDRAULIC IMPLEMENT CONTROL UNIT 4 Sheets Sheet 1 Filed March 10, 1950 Snnefxtor; w; xw A, wxla/vae 8 Axe/ aw ,1. wiewe March 3, 1954 A. J. WERNER ETAL 2,672,994 HYDRAULIC IMPLEMENT CONTROL UNIT Filed March 10, 1950 4 Sheets-Sheet 2 attorney March 23, 1954 J WERNER ET AL 2,572,994

HYDRAULIC IMPLEMENT CONTROL UNIT Filed March 10, 1950 4 Sheets-Sheet 3 Gttornegs Mam}! 1954 A. J. WERNER ET AL HYDRAULIC IMPLEMENT CONTROL UNIT 4 Sheets-Sheet 4 M/fl Filed March 10, 1950 attorneys thereon provides a means for rigidly mounting the frameto the front part of the tractor. The laterally spaced bolt holes 21 in the bracket facilitate the secure and rigid mounting of the frame. An additional U-shaped tubular member 29 bows over the top of the tractor hood, and is reinforced in this position by the braces 30 which brace the members 29 from the arched elements 22 of the A-frames.

The respective members 24, 25 and 29 provide spaced supports for, and are further braced by, the laterally spaced curved angle members 3| which extend in front of the tractor for protection of the tractor engine and radiator and to mount the hydraulic cylinder as shown in the embodiments of Figs. 9, l and 11.

The base frame 2| is further provided with angle brackets or shoes 32 at the rear ends of the arched tubular members 22 for the purpose of mounting the base frame at spaced points on the rear axle of the tractor. The rear shoes or brackets 32 are connected by the tie rod 28, as best shown in Fig. 17, which adds strength to the frame and does not interfere with the application of the frame to the tractor as the frame is lowered thereupon by means of a crane or the like.

The base frame provides a pivotal mount for a dipper stick, indicated generally in its different embodiments as 33 in Figs. 3 to 6. For this purpose, the A-frames 2| are cross connected at their apices by a tube 36 which has an internal bearing surface 51 for rock shaft 58.

A simple form of dipper stick having a manual trip control for manipulation of a working implement is shown in Figs. 3 and 4. The dipper stick frame comprises longitudinally extending spaced tubular levers 34 which are pivotally connected at their front ends to the implement, such as the material handling bucket 35, and at their rear ends to the base frame. Each dipper stick lever is of cantilever construction, having a central upstanding strut at 340, a shorter strut at 34!, and a tension rod 342 (Fig; 3). Specifically different struts are shown at 343 (Fig. 4) and 344; (Fig.

The levers 34 are provided with paired arms which may conveniently comprise downwardly arched tubular members 31 welded at spaced points to the respective levers 34, and which receive the thrust of the pistons of the paired hydraulic cylinders 33 and transmit such thrust to the dipper stick, desirably at approximately the location of the strut 340; The hydraulic cylinders 38 are pivoted on the pins M to the base frame mounting brackets 32. The dipper stick 53 is hydraulically lifted about its pivotal connection with the base frame member 36 when these cylinders are supplied with pressure by a hydraulic system to be described.

As best shown in Fig. 1, the interconnecting arched tubular members 22, the connective memaers 23, and the U - shaped members 25 and 29 of the base frame are hollow so as to provide a reservoir for the hydraulic fluid used to actuate the cylinders Dependent upon the type of tractor used, the pumping equipment supplied with the base frame, the fluid from the base frame reservoir is forced under control of a suitable valve, such as that shown at 46 in Fig. 1, into the respective hydraulic cylinders 38 either from a pump 42, mounted on the angle members 31 of the base frame as shown in Fig. 1, or a pump 43 mounted directly on the tractor 2!) as shown in Fig.3. a

Inthe embodiment of Fig. 1, the pump 42 its intake connected to the reservoir through has the line 44 and its outlet connected through line 45 to the valve 46 where the lines 41 and 4B branch to connections with the hydraulic cylinders 38. In the embodiment of Fig. 3, the pump 43 is connected through line 52 to a control valve 53 and thence to the hydraulic cylinders through lines 54.

As best shown in Figs. 10 and 11, the pump 42 mounted upon the base frame is actuated by a tractor engine crank shaft extension 55. The arrangement shown in Fig. 3 utilizes the pump 43 which is part of standard equipment supplied with the tractor for auxiliary power purposes.

Interchangeability between a variety of dipper sticks is accomplished by means of the novel pivotal mounting of the dipper sticks upon the base frame. As best shown in Figs. 2 and 4, the dipper stick is provided at the rear ends of the arms with sockets 55 which when properly positioned upon the base frame are aligned with the axial bearing bore 51 of the base frame cross member 35. A pivot pin or rock shaft 58 is removably disposed in bore 51 and has its respective ends projecting into the respective arm sockets 55 of the dipper stick. The shaft 58 is clamped to turn with the sockets 56, and is also held against axial displacement, by means of the set screws 5! in the collars or sockets 55 of the dipper stick. Release of the set screws 6! permits the shaft 53 to be removed completely to permit interchange of dipper sticks.

A variety of different types of dipper sticks are illustrated in Figs. 3, 4, 5 and 6. In Figs. 3 and 4, the dipper stick 33 is supplied with a manually operable release catch 53, which engages an aperture in the pivoted implement 35 to normally hold the implement rigid with the dipper stick and release the implement to dump its contents when desired.

The manual implement release per se is understood to be old in the art. Catch 63 is connected to a link 64 which is pivoted at one end to a fixed bracket 55 and its other end to a control rod 66. A hand lever 61 positioned within the operators reach controls reciprocating movement of the rod 66 to effectuate manual release of the catch 63.

The novel features of the invention directed to power lift apparatus disposed at the working end of the dipper stick are best illustrated in Figs. 5 to 15. In this apparatus, accurately controlled power for manipulating the implement independently of dipper stick movement respecting the tractor may be remotely applied by the operator. For this purpose, the dipper stick 33 is provided with a forward cross member 10 (see Fig. 5) which is welded or otherwise rigidly secured between the levers 34. A second cross member 11 is disposed relatively rearwardly of the cross member 15. Cross member 1| is supported somewhat above the level of the cross member 15 and the arms 34 at the top of struts 12.

Hydraulic power means comprising a hydraulic cylinder 15 including an extensible piston rod 14 is pivotally connected at 15 to the center of the cross member 1|. The piston rod 14 is thus disposed for extension past the front cross member 13 and may, in certain embodiments of the invention, be connected directly to the various implements as shown in Figs. 12, 13, 14 and 15.

Hydraulic pressure may be applied or released from either end of the cylinder through the lines 11 and 19 which connect with the source of hydraulic liquid through independent control valve eaeeie a erall the} re nd. he hive-tal y eenneet d through P. 4 t a 1 8.83 h-ie s: in him Piveielly eennee si ie hem-element e pin I 2 an I 2| is pivoted directly to the piston II2 to receive ietien-Jh reirem.-.

As, best shown in Fig, L6, the pivotal conneclion, between: theimplemenfl 35 and the paired levers 34 ,comprises-at each, lever a pivot pin I26 4 V aee a cetteeie v I Y- ,aee rlerth oh: The e ti a em amsa m u i e n members 4773. and H Whlh; at h? eemel te e d q the ee i eet hea th ee i f (time-er sti ke ers y: eee ihe the lieepeetive em sn aileer 1 A ri r, n errm d1; vda sie "lined I stea -he nds: e1 the arms MY .1 a c hteeeeeu element QhQQQPQQEfifiQ-With e eh o her end i u ie; yi-ieder eie e i e u in stiff nin the dip-per stick and third erinr 9 ahl o at iff entl to adapt it to other dermeantias- I purposes For-ea pie, when added downpres- .s s eenet uet en' nreviel s a e re e nrlrisi sure: on a beehfill lad -v 5 desired, he hi sting-fer hfi; el lihs fil' 5.- A SHE/SW5: draulio cylinderltl may be connected atone end at r ,he from itherr er dx e s on: r Wi t f ontal amber .3 of the b s frame fi nd draw l i. the, n etenred I4 a e abe h dlerhe t its e h re s to tnerims mente conn vaifious stress members, in his mfl hfilr eee-u- .tion tothabase frame includes a fixed pivot I32, ratesman pii ati ne r the imp men ma be e and the connection t the blade I includes a Ieetedrwithamihimum-ei l st motion, irot. lain Ino atien or back nuanc Several applications of; the hydraulic power forward or backward-thrust n; theblade is trans: meehi t9 the $031191 various implements are iei e item-the-treeter al ne a li e defined. by ustrated lZt' h 15. In Fig. 12, th efopyplanar arms 34 In the particular ara crane arm 85, which is pivoted at 81 to the dipfangemnt just describg d the pespgctive pivots perstiels ever 3 a is een ee dih eugh the li I32 and I34 are mutually offset from the, line of 86 to the piston rod 74. In Fig. 13, a scraper Q a ,r(- d i sH 5Qd afi gppgsite gides of t blade 88, which is pivoted to the dipper stick on v 1 pla n m leyerqsj 34 121 m1 34; dismsodbethe riail is ted; b plvet pins e low t plane and pivot- I3; is disposed the? time Iii E15? manure bucket abo e the-l ver-pla a Qeneeeuentlr, when fluid 3ii h h1il2 V0td 9h Dihhfl'tQ- -Penst ek pressure is app y fidyto thaextensi-ble parts of the hginngcted'thmggb the high? H den he,weiehtleithetraetor may b t ail r red":- I F g,15xtheferkl t flt ehis eive11 'fromtnctractorwheelatothe base frame et d n.- h pins 91, to he ipp r is een- Mihuallr: n-

ere f tit set e e eieran t2? toward he nd; a th it s s r 4 r thence te he-w r inaeds tenet thebl neei d; throu h. the rivers 3. br t at; an tie. Lamp-mann r, max mum downward. pres- CIOSS member t0 the piston rod 14. Various o pivoted positions which the implement may be bei'e aai]y app1j ed made to assume y hydraulic manipulation are 4 The general inclination of the blade I35 may illustrated in dotted lines in Figs. 14 and 15. b varied by means of th adjustam link I38 Completely de a b e hydraulic Dower means and I39, which are provided with a plurality of and mounting unit or pac y be pulhhased registering apertures I42 and with interchangeby a user and attached to a dipper stick not iniable connecting bolts M3, tially provided with implement power control A Somewhat similar arrangement i shown i means. In this manner, d pp r Sticks Originally Fig. 11 where a roller I44 is pivotally mounted pp With manual p release e as upon the levers 34 of the dipper stick 33 and is shown in Figs. 3 and 4, maybe i exp provided with paired brackets I45 for pivotal provided with front end P f AS best connection at I46 to the piston rod I41 of hyshown m e 6 a d 7, e umtary detachable 5 draulic cylinder I48. The cylinder is pivotally appa a includes an arched erees member I connected at I49 to the frontal members 3| of having its e ds provided With clamp Plates the base frame ZI. As in the case of the back 05 r a y clamped t0 the 34 of fill blade attachment, the respective pivotal conper St c y bolts the The Intel nections I45 and I49 are oppositely ofiset from m d t D p f the P member 60 the lever arms 34 of the dipper stick so as to inis provided Wit a plvotal mountmg on fixed sure the development of downwardly thrust upon bracket II 0, thus providing a pivotal connection the roller to the extent of t weight of t for the hydraulic cylinder I09. The cylinder pistractor t 0I1 is D 'F by h hydrauhc fluld From the foregoing description, taken in conllneS and h provide for fiu1d pres nection with the accompanying drawings, it is sure in either direction. The fixed pivot I 08 of seen that We have made novel provisions for a t hydraulic cylinder is reinforced by reds I hydraulic power means at the forward end of a co ec ed t the bracket d which tractor dipper stick attachment so as to permit ally diverse therefrom to a fixed connection with remotely n- 11 a manipulation of an 1 the paired brackets H a s ar p ment pivoted thereto. The various features of vided with clamp plates II 8 and bolts II9 to rethe invention wherein the hydraulic means may leasably secure the brackets II! to the levers 34 be embodied as a permanent unitary part of the forwardly of the cross member I 03, dipper stick, or as a completely detachable unit Linkage means for transmitting power from to be added at the users option, have been the piston II2 to the implement 35 desira- [5 pointed out. The provision of the third cylinder w et i "Aerbeeteh wn i R se-e end t e ent parts as a separate applicable unit is particularly desirable to permit progress gradually from a relatively inexpensive manually operated dipper stick to a more costly power equipped frame. The interchangeable pivotal connection between the base frame and the dipper stick is further provided to facilitate this and other interchanges of dipper stick frames.

The specific provisions for mounting and alternate disposition of the third or forward cylinder of the hydraulic power means respecting the implement and the dipper stick or the base frame will increase its range of use. When said cylinder is connected to the dipper stick, it is useful for independent manipulation of the supported implement throughout the course of movement of the dipper stick respecting the base frame. When the hydraulic cylinder is connected to the base frame, it is useful primarily as a means for transferring the weight of the tractor to the implement. In both positions, the particular positions of the braces and the cantilever construction of the dipper stick have been found to contribute maximum strength and adaptability.

As compared with other dipper stick attachments for tractors, the arrangement whereby dipper sticks of various types are freely interchangeable on the mounting frame has also been found to be of unusual service. Moreover, the connection between the rear ends of the mounting frame holds the various parts in accurate alignment during shipment and use.

We claim:

1. In a tractor attachment comprising a base frame applicable to a tracton'a boom pivotally attached to the base frame and comprising truss structure including laterally spaced boom arms having upwardly extending strut parts and tension rod parts above the arms immediately supported on the struts and connected with the arms at longitudinally spaced points, an implement mounted on the ends of said arms and having a movable element, and means detachably mounted on the boom arms for the operation of the element, said means comprising a support having a leg portion constituting a clamp member engaged with the truss structure of one of said arms and provided with a cooperating clamp member engaged oppositely with said truss structure of the same arm, and means for drawing the said clamp members together upon the intervening truss structure, an actuator on the support in operative motion transmitting connection with the said implement element, and means for operating the actuator, said clamp members engaging diiferent parts of said truss structure at spaced points for the secure positioning of said actuator on the boom during operation of said implement element.

2. The device of claim 1 in which said support further include means laterally spanning the boom and having like leg and clamp members engaged with the arm and truss structure at the opposite side of the boom.

3. Ihe device of claim 2 in which said actuator comprises a rock shaft mounted for oscillation on said support and having a power receiving arm, in further combination with a second support having detachable clamp connection with the boom arms, and a ram mounted on the support having an operating rod connected with the power receiving arm, and means connecting said implement element and said rock shaft.

ARNOLD J. WERNER.

ADOLPH A. WAGNER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,451,101 Leschinsky Oct. 12, 1948 2,482,612 Drott et al Sept. 20, 1949 2,495,143 Simmonds Jan. 17, 1950 2,517,582 Lull Aug. 8, 1950 2,530A14 Wells Nov. 21, 1950 2,619,244 smith Nov. 25, 1952

Images