JPS6310651Y2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to a coupling device for coupling an agricultural machine such as a tiller to a tractor.

(2) Prior art and its problems Conventionally, in a tilling and crushing machine, for example, a working machine that performs plowing work, lower link arms on both sides of the working machine are generally connected to lower links on both sides of a tractor via lower link pins. Additionally, the input shaft of the working machine is connected to the output shaft of the tractor via a universal joint. Then, while towing the work equipment with a tractor,
The rotary work body of the work machine is driven in conjunction with the rotary work unit to plow the field.

When performing raking work at the edge of a ridge, if the edge of the ridge is higher than the other areas, the wheels on the ridge side of the tractor traveling in this area will cause the tractor to move inward as a whole. At the same time, the working machine also tilts in the same direction via the lower link and lower link arm, and therefore,
There is a drawback that the rotary work body pushes the cultivated soil toward the ridge and pushes the soil higher at the edge of the ridge.

(3) Purpose of the invention The present invention independently adjusts the lateral inclination of the agricultural machine when it is connected to the tractor or before it is connected to the tractor, prevents the agricultural machine from constantly following the lateral inclination of the tractor, and improves the working conditions. The purpose is to enable agricultural work to be carried out in an appropriate working posture according to the situation.

(4) Structure of the invention The coupling device for agricultural machinery of the invention consists of a connecting frame in which left and right lower link pins are provided at the bottom of both sides to connect the left and right lower links of the tractor, and a connecting frame that protrudes forward from the left and right sides of the agricultural machinery. A guide plate is fixed to the tip of the lower link arm and has a communication hole. a hitch mounting plate having a plurality of locking holes selectively communicated with the communication holes, and having a hitch metal fitting provided at the tip portion for removably connecting and locking the left and right lower link pins; The guide plate is provided with a stopper which is movably provided on the guide plate and which is inserted into one of the locking holes and the communication hole communicating with the locking hole to lock the two together, and a handle which moves the stopper forward and backward. .

(5) Example of the invention Next, an example of the invention shown in the attached drawings will be described.

1 to 3, reference numeral 1 denotes a tractor, and a top link 2 is attached to the rear upper part of the tractor 1 so as to be rotatable in the vertical direction, and lower links 3 are installed on both sides of the rear lower part. It is mounted so that it can rotate in any direction.

4 is a connecting frame 4 formed in a gate shape.
A connecting piece 6 is placed on the horizontal rod portion 5 of this connecting frame 4.
are erected in a parallel manner facing each other, and a connecting portion 7 is formed between the upper end portions of the opposing connecting pieces 6 to connect the rear end portion of the top link 2 in a detachable and rotatable manner. The opposing connecting pieces 6 are supported by a support rod 8 in the middle. Further, projecting pieces 9 are provided in parallel to each other at the rear of the horizontal rod portion 5 of the connecting frame 4, and a horizontal rod-shaped connecting pin 10 is fixed between the rear ends of the projecting pieces 9. There is. Further, lower link pins 12 are provided on the outside of the lower part of the vertical rod portions 11 on both sides of the connection frame 4 to protrude substantially horizontally, and connect the rear end portions of the lower links 3 at their outer ends in a detachable and rotatable manner. , and disk-shaped flanges 13 are fixed to the inner ends of the lower link pins 12 on both sides thereof.

Reference numeral 14 denotes a tilling and crushing machine as an agricultural work machine, and this tilling and soil crushing machine 14 is equipped with a transmission 17 with an input shaft 16 protruding forward in the middle part of a machine frame 15.
Lower link arms 18 are provided on both sides of the machine frame 15 to protrude forward. Further, horizontally long guide plates 19, which are formed to gradually become wider toward the front, are fixed to the tips of the lower link arms 18 on both sides by bolts and nuts 20, and are attached to the upper and lower edges of the guide plates 19 on both sides. A stopper piece 21 is bent outward. Further, the rear end of a hitch mounting plate 23 disposed inside the guide plate 19 is attached to a horizontal shaft 22 to which the guide plates 19 on both sides and the tips of the lower link arms 18 are fixed, so that the hitch mounting plate 23 can rotate freely in the vertical direction. A plurality of locking holes 25 are drilled in the upper and lower middle of the mounting plate 23, and the locking holes 25 communicate with the communication holes 24 drilled in the tip of the guide plate 19. A hitch metal fitting 26 to which the lower link pin 12 is detachably connected is fixed to the lower link pin 12. The hit metal fittings 26 on both sides are formed into an approximately inverted U shape with the lower side open, and a holding portion 29 that holds the lower link pin 12 in a curved joint between the front piece 27 and the rear piece 28. An engagement guide portion 30 is integrally formed below the rear piece 28 and extends downward from the lower edge of the front piece 27. A guide hole 31 that is long in the direction is bored. Further, a mounting rod 33 is horizontally suspended between the mounting pieces 32 protruding from the upper part of the hitch fittings 26 on both sides and the hitch mounting plate 23, and a release lever 34 is rotatably mounted on the mounting rod 32. An arcuate locking portion 36 at the lower end of a C-shaped lock arm 35 integrally formed at the bottom of the release lever 34 projects freely into the opening 37 of the holding portion 29 from the guide hole 31. One end 38 _a of the coil spring 38 provided and wound around the mounting rod 33 is attached to the release lever 34 .
The other end _38b is the locking portion 3 of the hitch mounting plate 23.
9 respectively. The lock arm 35 is always energized by the coil spring 38, and the locking portion 36 protrudes from the guide hole 31 into the opening 37 of the holding portion 29.
The inner lower link pin 12 is locked from below. Next, mounting pieces 40 are horizontally protruded from the upper ends of the guide plates 19 on both sides, and a handle 42 is rotatable in the left-right direction between the opposing mounting pieces 40 via a horizontal shaft 41. Pivotally supported,
A rod-shaped stopper 43 fixed to the lower end of the handle 42 connects the guide hole 45 of the support frame 44 fixed to the guide plate 19 to the communication hole 24 of the guide plate 19.
The stopper 43 is inserted into a selected one of the locking holes 25 of the hitch mounting plate 23 so as to be able to move forward and backward. It is inserted through and energized so as to protrude outward.

Further, a top mast 47 is provided on the transmission 17 provided in the machine frame 15 so as to protrude forward, and the top mast 47 has a top end attached to the connecting frame 4.
An upper hitch fitting 48 is fixedly attached to the connecting pin 10 in a detachable manner. This hit fitting 48 is formed into a substantially inverted U-shape with its lower side open, and a holding portion 4 that holds the connecting pin 10 in a curved connecting portion between a front piece 49 and a rear piece 50.
8 _a is formed, and the rear piece 50
An engagement guide piece 51 is integrally formed below the front piece 49 and extends downward from the lower end edge of the front piece 49. The top mast 47 and the lower link arms 18 on both sides are maintained at a distance by stays 52.

Furthermore, a rotary work body 55 is constructed by providing a large number of tilling claws 54 radially protruding in the axial direction between the lower ends of a chain case 53 and a bracket (not shown) attached to both ends of the machine frame 15. The rotary work body 55 is rotatably mounted on a shaft, and is driven in conjunction with the transmission 17 via an interlocking medium (not shown).
In the figure, 56 is a cover body that covers the upper part of the rotary work body 55, and 57 is rotatably attached to the cover body 56, and a mounting piece 58, a vertically movable rod 59, and a spring 60 are attached to the machine frame 15.
It is a leveling plate that is supported through the .

In the device configured in this way, the handle 42 is rotated about the horizontal shaft 41, the stopper 43 is pulled out from the locking hole 25 against the spring 46, and the hitch mounting plate 23 is moved to the horizontal shaft 22.
As shown in FIG. 3, for example, as shown in FIG. , stopper 43
is pushed out by the restoring force of the spring 46 and automatically inserted into the selected upper locking hole 25, so that the hitch mounting plates 23 on both sides are fixed in a predetermined position and the hitch mounting plate 23 is The hitch fitting 26 at the tip of the plate 23 is set at a predetermined position. Next, the tractor 1 is
When the tractor 1 is moved backward, the connecting pin 10 of the connecting frame 4 connected to the top link 2 of the tractor 1 and the lower links 3 on both sides comes into contact with the engagement guide piece 51 of the rear piece 50 of the hit fitting 48 on the upper part of the tiller 14. At the same time, the lower link pins 12 on both sides of the connecting frame 4 abut and engage with the engagement guide portions 30 of the hit fittings 26 on both sides of the tiller 14. When the connecting frame 4 is pulled up together with the three-point suspension mechanism by the hydraulic drive of the tractor 1, the lower link pins 12 on both sides come into contact with the locking portions 36 of the lock arms 35, and due to the lifting force, The lock arm 35 is rotated counterclockwise in FIG. 3 against the coil spring 38, so that the locking portion 36 is pushed out of the guide hole 31 and inserted into the holding portion 29 of the hit fitting 26. Further, the lower link pins 12 on both sides are inserted into the holding part 29, and the lock arm 35 is rotated back clockwise by the restoring force of the coil spring 38, so that the locking part 36 is moved from the guide hole 31 to the lock arm 35. It protrudes into the opening 37 and prevents the lower link pin 12 from coming off. At the same time, the connecting pin 10 is similarly inserted into the upper holding portion _48a of the hitch fitting 48. Further, one end of a universal joint (none of which is shown) is connected to the output shaft of the tractor 1, and the other end is connected to the input shaft 16 of a transmission 17 provided on the tiller 14. In this way, the tiller 14 is connected to the tractor 1. Next, when the tractor 1 is driven to tow the tiller 14 and the input shaft 16 is driven in conjunction with the output of the tractor 1, the rotary work body 55 is driven in conjunction with the transmission 17 and the interlocking medium. The rotary work body 55 advances the field while plowing and crushing the soil or plowing the field.

When plowing or plowing the edge of a ridge, if the edge of the ridge of the field is raised higher than other parts, the wheels _1a on the ridge side of the tractor 1 move to the higher part. As the tractor runs over the ridge, the entire tractor 1 tilts inward on the opposite side of the ridge. Further, the tiller and crusher 14 also follows this and tilts in the same direction. In such a case, one handle 42 located on the inside opposite to the ridge side is rotated about the horizontal shaft 41 and the stopper 43 is pulled out from the locking hole 25 against the spring 46. At the same time, lift the hitch mounting plate 23 using the horizontal shaft 22 as a fulcrum,
For example, when the handle 42 is released with the locking hole 25 at the bottom of the hitch mounting plate 23 aligned with the communication hole 24 of the guide plate 19, the stopper 43 is pushed out by the restoring force of the spring 46 and is selected. It is automatically inserted into the lower locking hole 25. As a result, the inner hitch fittings 26 on the opposite side to the ridge side are set at a higher position than the outer hitch fittings 26 on the ridge side. are corrected horizontally without following it and set to be connected, or corrected to a state slightly inclined to the outside of the ridge side and set to be connected. In this state, the tractor 1 is running to tow the tiller 14, and the rotary work body 5 is also moved by the tractor 1.
By interlocking and driving the rotary working body 55, the field on the ridge side is moved forward while being tilled and crushed or raked. Then, the raised soil at the edge of the ridge is reliably pushed back to the inside on the opposite side from the ridge side while being tilled and crushed soil or plowed, and the area at the edge of the ridge is reliably leveled by the leveling plate 57. . In this way, the handle 42 can be rotated depending on the working conditions in the field, and the stopper 43 can be rotated.
By selectively engaging and disengaging one of the locking holes 25 of the vertically movable hit metal fittings 26, the vertical position of both or one of the hit metal fittings 26 can be adjusted and set, and the It is possible to carry out plowing, crushing or puddling work to bring the soil into an appropriate state and level it.

In this embodiment, the hitch mounting plate 23 has two locking holes 25 in the upper and lower directions; however, the present invention is not limited to this, and more holes may be provided in the vertical direction.
As a result, the adjustment range of the vertical position of the hit metal fitting 26 can be widened and set appropriately, and the working conditions in the field can be adequately coped with.

(6) Effects of the invention According to the invention, the hitch mounting plate having the hitch metal fitting is moved up and down about the horizontal axis to make one of its locking holes communicate with the communication hole of the guide plate. By inserting the stopper that is moved forward and backward by the handle into the communication hole and the locking hole and locking them together, the height position of the hitch metal fitting can be easily adjusted and set.
Depending on the working conditions in the field, the agricultural implement can be independently adjusted to tilt laterally, for example, while connected to the tractor or before being connected to the tractor, so that the implement can always follow the horizontal inclination of the tractor. This allows agricultural work to be performed in an appropriate working posture according to the working conditions, and therefore, agricultural work can be performed appropriately not only on flat land but also on sloped land and along raised ridges.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention. Figure 1 is a side view of a tractor connected to an agricultural machine;
This figure is a perspective view of the above-mentioned coupling device, and FIG. 3 is a perspective view of the position adjustment mechanism of the above-mentioned hitch fitting. 1...Tractor, 3...Lower link, 4...Connection frame, 12...Lower link pin, 14...
Agricultural machine, 18...Lower link arm, 19...
Guide plate, 22...horizontal axis, 23...hitchi mounting plate,
24... Communication hole, 25... Locking hole, 62... Hit fitting, 42... Handle, 43... Stopper.

Claims (1)

[Scope of claim for utility model registration] A connection frame in which left and right lower link pins are provided at the bottom of both sides to connect the left and right lower links of a tractor, and fixed to the tips of lower link arms that protrude forward from the left and right sides of an agricultural machine. a guide plate having a communicating hole; a guide plate disposed along the guide plate, the proximal end of which is pivotally movable up and down via the horizontal axis of the guide plate, and a guide plate that is selectively movable up and down with respect to the communicating hole; a hitch mounting plate having a plurality of locking holes communicating with the left and right guide plates, and having hitch fittings provided at the tips thereof to connect and lock the left and right lower link pins in a detachable manner; A stopper that is inserted into one of the locking holes and the communication hole that communicates with the communication hole to lock the two together; and a handle that moves the stopper forward and backward. Device.