JPS63177704A - Hitch apparatus of agricultural working machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an agricultural machine coupling device, and more particularly, to an improved coupling mechanism for a tractor that connects and tows agricultural machines.

(Conventional Technique #i) Conventionally, the coupling mechanism of a tractor that connects agricultural machinery includes, for example, lower links on both sides that are rotatably supported in the downward direction at the rear of both sides of the tractor, and lower links on the upper side of the tractor. A three-point link mechanism is known that includes a top link rotatably supported in the vertical direction at the rear.

In addition, brackets 1~ that protrude rearward are installed on the lower links on both sides of the tractor and on the upper rear part of the tractor.
A special two-point link mechanism is known which is constituted by a short one-to-two link that is pivotally supported by the underground rotatable motor 9.

Then, for example, a rotary work machine is connected to the three-point linkage mechanism or the special three-point linkage mechanism, and a universal joint is established between the power take-off shaft of the tractor and the input shaft of the transmission of the rotary work machine. The power transmission shafts are connected, and the rotary bamboo leaf machine is towed by a tractor, and the rotary is rotated by the power of the tractor.

(Problem to be Solved by the Invention) According to the configuration of the three-point link mechanism described above, when the lift leg of the rotary work machine is increased, that is, when the tilling claw of the rotary is raised high above the ground, the lower link and the top Since the movement with the link is different, there will be a large angle difference between the bending angles of the 1-Nibar truss joints at both ends of the power transmission shaft, which may cause abnormal noise during power transmission and make the rotation uneven. Therefore, the desired riff hfB-
There is a problem that it may not be possible to secure the

Further, according to the configuration of the above-mentioned special three-point linkage mechanism, although the desired amount of glue 71 can be obtained, the posture of the rotary work machine changes greatly during work. When performing work that combines plowing and soil cultivation, changing the tilling depth of the rotary will greatly change the working depth of the soil cultivator, making it difficult to obtain the appropriate soil cultivation.
There is a problem in that the fling operation becomes difficult and therefore a slight 1) depth adjustment of the rotary requires a large readjustment of the tiller.

Therefore, the present invention was made in view of this point.
It is an object of the present invention to provide an agricultural work crosspiece connecting device which can prevent the occurrence of aliases, secure a desired ground clearance at a sufficient height of 71 to 70 degrees, and is made more flexible by minimizing changes in the attitude of agricultural work equipment. That is.

[Structure of the invention]

(Means for Solving the Problems) The agricultural work crosspiece coupling device of the present invention includes lower links on both sides that are pivotably supported on both rear sides of a tractor so as to be able to freely rotate up and down, and that connect an agricultural work machine to the distal end of the tractor. A top link is provided at the upper rear part of the frame so as to be rotatable in the vertical direction, and the top link connects the agricultural machine to the distal end thereof, and the top link is centered around the central axis of rotation of the att part and the central axis of rotation of the intermediate part. It is composed of a first link and a second link that are rotated upward in stages, and the second link is normally restricted from rotating and is placed on an extension of the first link. In both cases, the lock is released by restricting the upward rotation of the first link, and the upward rotation is restricted independently around the central rotation axis of the intermediate portion.

(For fl) The agricultural work crosspiece connection device of the present invention is capable of connecting agricultural machines to the tips of the lower links on both sides of the tractor and the tips of the second link in the top link. Connect the power transmission shaft between the input shafts of the machine via a universal joint. In this case, the second link in the top link is locked in a state extending along the extension line of the first link, so that the tip of the second link and the tips of the lower links on both sides The agricultural machine is held in a constant working posture by this, and soil action is performed in this set soil action attitude.

Next, the lower links on both sides are rotated upwardly around the support shaft on the tractor side, and the first link in the top link is rotated upwardly around the central axis of rotation at its base end, and is placed at a predetermined position. When it is rotated upward to the point above, the A rotation is restricted.

Then, when the lower links on both sides are rotated further up,
The lock of the second link in the top link is released, and this second link becomes freely rotatable independently from the first link around the central rotation axis of the middle part, and continues to rotate upward and R. be done. Therefore, the agricultural machine is provided with a necessary and sufficient lift amount, and a desired ground clearance is secured.

(Examples) Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In the figure, reference numeral 1 indicates a tractor equipped with a rotatable vehicle 2, and this tractor 1 has a main body 3 with support @ 4, 4 provided at the rear of both sides, and base ends of lower links 5° 5 on both the left and right sides. The lower links 5, 5 on both sides are freely pivoted, and the lower links 5, 5 on both sides are
The tractor 1 is connected to a lifting rod (not shown) for vertical movement by the hydraulic drive mechanism of the tractor 1. A connecting frame 6 is fixed to the upper rear part of the main body 3, and one end of a pair of brackets h7.7 facing the connecting frame 6 is fixed by a plurality of removable poles 1 to 8. Bracket 7.7
A plate-shaped stopper 9 tilted rearward and upward is fixed between the soil parts of C.

Further, an insertion hole 10. is provided in the lower part of one end of the pair of brackets 7.7 and in the vicinity of the FIB of the connection frame 6 to which it corresponds.
10 are formed in communication with each other, and the rotation center @11 is removably inserted into the insertion hole 10.10.
．． Mounting holes 12 and 12, through which the bolts of the plurality of poles 1 to 8 are inserted, are formed in the upper part of the bolt 10, facing each other vertically.

Moreover, the bracket 7 of -λ1 is attached to the rotation center axis 11.
The proximal ends of the tube links 1 to 13 interposed between the tubes 7 are pivotally supported so as to be rotatable in the vertical direction. This single link 13 is composed of a first link 14 and a second link 15. The first link 14 is a pair of links extending in parallel through a guide plate 16 interposed and fixed between the intermediate portions and a stopper plate 17 as a stopper interposed and fixed between the tip vicinity portions. An insertion hole 19.19 is formed at the base end of the pair of link pieces 18.18, through which the rotation center shaft 11 is rotatably inserted.・Pair link piece 18.1
Communication holes 20 and 20 are formed opposite to each other at the tip of 8,
Furthermore, mounting holes 22.22 having opposing mounting holes 21.22 are provided protruding from the substantially mountainous portions of the pair of link pieces 18.18.

Further, the second link 15 has a mounting hole 23 communicating with the mounting hole 21.21 in the middle part, a connecting hole 24 as a connecting part in the tip part, and a connecting hole 24 in the base. An arcuate engagement edge 25 is formed at the end.The second link 15 is connected to the first link 14.
It is interposed between the pair of link pieces 18 and 18, and the rotation center of the intermediate part is located in the communication hole 20 and the attachment hole 23, respectively.
It is inserted inside 26B26.

As a result, the second link 15 is provided to be vertically rotatable independently of the first link 14 about the rotation center axis 26, and the upper edge group 27 near the base end thereof
is locked to the lower part of the stopper plate 17 and is extended rearward on the extension line of the first link 14 in a state where downward rotation is restricted.

In addition, the pair of links 1 in the first link 14 are
A lock/release means 29 is provided between the opposing mounting holes 21 and 21 of 8.18 via a support shaft 28. This locking/releasing means 29 has a lock arm 31 which is rotatably mounted on the support shaft 28 through an insertion hole 30, and has an arm portion 32 of one side of the lock arm 31. A locking portion 33 that removably locks the engagement edge 25 of the second link 15 is formed at the tip, and this lock arm 31
The lower end of the retractable rod 35 is rotatably connected to the other arm portion 34 via a connecting pin 38 inserted into each communication hole 36,37.
A large-diameter head 4 is inserted into the guide hole 39 of No. 6 so as to be freely advanced and retractable, and at the upper end of this 3z retractable rod 35 is engaged with and disengaged from the stopper 9.
0 is formed, and a coil spring 41 is wound around the reciprocating rod 35 between the large diameter head 40 and the guide plate 16. The coil spring 41 constantly urges the advancing/retracting rod 35 in the axial direction, and the lock arm 31 rotates around the support shaft 28.
The engagement edge 25 of the second link 15 is locked by the locking part 33 on one arm 32 of the second link 1.
5 is integrally supported in a state extending rearward on an extension line of the first link 14.

Further, 42 is a rotary working machine as an agricultural working machine, and this rotary working machine 42 has a main frame 4 extending in the left and right direction.
The upper ends of a chain case 44 and a bracket (not shown) are fixed to opposite ends of the chain case 44 and the bracket, and a rotary 47 consisting of a tilling shaft 45 and a plurality of tilling claws 46 is installed between the chain case 44 and the lower end of the bracket. is provided inside the rotation. Further, a mission case 49 is provided in the middle of the main frame 43, from which the input @ 4B is rotatably protruded forward, and the tilling shaft 45 of the rotary 47 is connected to the output shaft of the mission 49 and the chain case 44 to the mission case 49. They are interlocked and connected via an interlocking medium such as an inner chain.

In addition, lower arms 50° and 50° are provided at the front portions of both sides of the main frame 43.
are provided in parallel in a protruding manner, and a lower pin 51.51 is provided at the distal end of the lower arm 50.50 to connect the distal end of the lower link 5.5 to the rotating automatic plate.

Further, a top mast 52 is protruded from the upper front part of the transmission 49 of the main frame 43, and the connecting hole 24 of the second link 15 of the top link 13 is connected to the tip of the top mast 52 via a connecting pin 53. A connecting portion 54 is formed, and the top mast 52 and the left and right lower arms 50.50 are connected by a stay 55. In addition,
In the figure, reference numeral 56 denotes a cover integrally covering the upper part of the rotary 47, and 57 a grounding plate resiliently supported at the rear end of the cover integral 56 so as to be rotatable in the vertical direction.

Next, the operation of the above configuration will be explained.

1-Make the tips of the lower links 5 and 5 on both sides of Rakuta 1 rotary! It connects to the left and right lower pins 51 and 51 of I42, and also connects to the second
Connect the connecting portion 54 of the mast 52 to the connecting hole 24 at the tip of the link 15 of the rotary working machine 42 with the connecting pin 53
Connect via.

Further, a power transmission shaft is connected between the power output shaft 58 of the tractor 1 and the input shaft 48 of the rotary working machine 42 via a universal joint (not shown).

In this case, the second link 15 in the top link 13
is the lock arm 31 and slot 1 of the lock/release 1 stage 29.
- By being locked and integrated in a state extending on the extension line of the first link 14 by the tube plate 17, the tips of the lower links 5, 5 on both sides, such as the tip of the second link 15. As a result, the rotary work t142 is held in a certain working posture, and the rotary 47 of the rotary work machine 42 plows in this set attitude toward the soil.

That is, while the rotary work machine 42 is towed by the tractor 1, the power take-off shaft 58 of the tractor 1 is
The mission 49 is activated by the power input to the input shaft 48 from
The rotary 47 is plowed through the output shaft and the interlocking medium, but even if the rotary L rotary work machine 42 is adjusted slightly in the vertical direction during work, the left and right lower links 5, 5
Also, due to the integrated top link 13, the front-to-back posture of the rotary and work implement 42 does not change significantly, and therefore, the rotary 47 plows in the set soil-action posture.

Next, when the hydraulic drive mechanism of the tractor 1 is driven and the lifting rod connected to it is lifted up, for example when changing direction or going over a ridge, the left and right lower links 5.5 act as supports for the tractor 1. 14.4, and the first link 14 of the links 1 to 13 rotates around the rotation center axis 11 at its base end.
When the upper edge of the first link 14 is rotated upwardly around the bracket 7.
Therefore, the upward rotation of the first link 14 about the rotation center axis 11 is restricted and stopped. Further, almost at the same time when the upper edge of the first link 14 is locked with the stopper 9, the lock/release means 2
The large-diameter head 40 of the advancing/retracting rod 35 of No. 9 is locked with the stopper 9, and the advancing/retracting rod 35 is gradually pushed against the coil spring 41, and the lock arm 31 pivoted thereon is attached to the support shaft 28. The locking portion 33 on one arm portion 32 of the lock arm 31 is rotated around the
is disengaged from the engagement edge 25 of the second link 15, the lock of the second link 15 is released, and the second link 15 becomes free to rotate upward. Then, when the left and right lower links 5°5 are further rotated upward about the support shafts 4, 4, the second link 1 in the top link 13
5 is continuously rotated upwardly, independently from the first link 14, around the central rotation axis 26 in the intermediate portion. in this case,
The rotation fulcrum of the second link 15 in the top link 13, that is, the rotation center @26 is located at the rear of the rotation fulcrum of the left and right lower links 5, 5, that is, the support shafts 4, 4, and the rotation radius of each is Therefore, the rotary work machine 42 has a lifting rotation using the left and right lower links 5.5 and a second link 15 using the top link 13.
The rotary 47 can be pulled up to the necessary amount of lift without significantly changing its posture by pulling forward and rotating, and the rotary 47 can obtain a large ground clearance necessary for changing direction or crossing ridges.

In addition, at this time, a large angle difference occurs in the bending angle of phase U in India at both ends of the power transmission shaft that connects the power take-off shaft 58 of 1 to 1 and the input shaft 48 of the rotary work machine 42. Therefore, no abnormal noise is generated during power transmission, and therefore, the rotary machine can be sufficiently improved to 71 to 100 mph without abnormal noise as a problem.

〔Effect of the invention〕

According to the present invention, the top link configured by connecting the first link and the second link can be moved upwardly and rotationally in stages by moving the fulcrum in the upward rotational stage. It is possible to reliably prevent the generation of abnormal noises related to the lift-up of the farm equipment, ensure the desired ground clearance with a sufficient lift amount, and reduce changes in the attitude of the agricultural machine. It is possible to provide an agricultural connection device with excellent workability and operability.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and Fig. 1 is a side view showing a state in which the tractor and the agricultural machine are connected by a coupling device for agricultural work, and Fig. 2 is the same. 3 is a side view of the same, FIG. 4 is a side view showing the operating state of the top link, and FIG. 5 is an exploded perspective view of the same. 1. Tractor, 4. Support shaft, 5. Lower link, 7.
・Bracket, 9, 17・・Stopper, 11, 26・
- Rotation center axis, 13...Top link, 14...First link, 15...Second link, 29...Lock/release means, 42...Agricultural machine.

Claims (3)

[Claims] (1) Lower links on both sides that are rotatably supported in the vertical direction at the rear of both sides of the tractor and connect the agricultural machine to the tip, and lower links on both sides that are rotatably supported in the upper rear of the tractor and connected to the agricultural machine at the tip. Equipped with a top link that connects the machine,
The above-mentioned top link is composed of a first link and a second link that are rotated upward in a stepwise manner around a rotation center axis of the base end portion and a rotation center axis of the intermediate portion. The link is normally restricted from rotating and is locked on an extension of the first link, and is unlocked by restricting the upward rotation of the first link and becomes independent around the center axis of rotation in the middle section. A farming machine coupling device characterized in that it is provided so as to be able to move up and rotate freely. (2) The first link of the top link has a stopper that limits the downward rotation of the second link, and locks this second link on an extension of the first link and releases this lock. 2. The agricultural machine coupling device according to claim 1, further comprising locking and releasing means for locking and releasing the device. (3) The first link of the top link is restricted in its upward rotation by a stopper provided through a bracket on the upper rear part of the tractor, and the locking/releasing means is actuated by this stopper. 3. The agricultural machine coupling device according to claim 1 or 2, wherein