JPH052025Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to an agricultural machine coupling device, and relates to a device that is interposed between a tractor and an agricultural machine and connects them to each other.

(Prior Art) Conventionally, as this type of agricultural machine coupling device, for example, as described in Japanese Utility Model Application Publication No. 60-62205, a top link of a tractor is attached to the top of a coupling frame formed in a mountain shape. A structure is adopted in which a pair of connecting plates are fixed and erected together.

(Problems to be solved by the invention) According to the structure described in the above-mentioned publication, the pair of connecting plates connecting the top links are fixed to the top of the connecting frame. In some cases, it may not be possible to obtain the required amount of lift by simply raising and rotating the left and right lower links of the tractor, and for example, if the agricultural machine such as a frel mower is towed on a slope while maintaining a constant posture. However, there are problems such as the fact that agricultural machinery may not be able to adapt to changes in the slope of the land.

Therefore, the present invention was developed in view of these points, and it is designed to provide the necessary lift amount for agricultural machinery at the connection part of the toppling link, and also to enable agricultural work that fully responds to changes in working conditions such as on sloped land. The object of the present invention is to provide an agricultural machine coupling device that can perform the following operations.

[Structure of the idea]

(Means for Solving the Problems) The agricultural machine coupling device of the present invention connects a mountain-shaped coupling frame to a three-point suspension mechanism of a tractor, and connects a farm machine to this coupling frame. A top link connector for connecting the top link of the tractor is provided on the top of the connection frame so as to be rotatable and fixed at a set position.

(Function) The agricultural machine coupling device of the present invention rotates the top link coupling tool relative to the top of the coupling frame depending on the working conditions in the field or the relationship between the farm machine and the tractor that pulls it. Set to a free state or a locked state where the setting position is fixed. The tips of the top links of the tractor are rotatably connected to the top link connector, and the tips of the left and right lower links of the tractor are rotatably connected to the left and right lower connecting portions of the connection frame. Thereby, the connection frame is connected and suspended to the top link and lower link of the tractor.

Next, when the top link and left and right lower links of the tractor are rotated upward, the upper connecting portion and the left and right lower connecting portions of the connecting frame are engaged and connected to the respective connecting portions of the agricultural machine. Thereby, the agricultural machine is connected to the three-point suspension mechanism of the tractor via the connection frame in a state in which a predetermined lift amount can be obtained or in a state in which it can respond to changes in working conditions.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

1 to 4, reference numeral 1 denotes a connecting frame made of rod-shaped material or the like and formed into a substantially mountain shape, and a bracket 3 is attached to a horizontal portion 2 with a circular cross section formed at the top of the connecting frame 1. It is fixed. This bracket 3 has a pair of substantially fan-shaped mounting plates 4, 4 that are integrally provided on the left and right sides of the horizontal portion 2, and a pair of substantially fan-shaped mounting plates 4, 4 are provided near the upper ends of the pair of mounting plates 4, 4. A plurality of locking holes 5, 5 are formed facing each other at predetermined intervals in the front-rear direction, and a front stopper is provided between the front and rear ends of the pair of mounting plates 4, 4, respectively. 6 and a rear stopper 7 are formed, and connecting plates 8, 8 are integrally expanded and protruded rearward from the rear end lower part of the pair of mounting plates 4, 4. , 8 near the rear ends thereof, an upper connecting rod 9 is integrally suspended horizontally.

Further, the horizontal portion 2 at the top of the connection frame 1
A top link connector 10 is attached to the bracket 3 so as to be rotatable in the front and rear directions.
This top link connector 10 has the horizontal portion 2
It has a cylindrical body 11 which is rotatably engaged with the cylindrical body 11, and on the upper part of this cylindrical body 11, connecting plates 12, 12, which have an inverted L shape when viewed from the side, face each other at a predetermined interval and are integrally formed. A spacer 12a is interposed between the pair of connecting plates 12, 12, and the pair of connecting plates 1
A plurality of mounting holes 13, 13 are formed facing each other in the front and rear of the upper end portions of the upper ends of the 2, 12, and the upper and lower parts of the vertical portions, respectively, and the pair of connecting plates 12, 1
In the vicinity of the lower end of the bracket 2, there are communication holes 14, 1 that communicate with the locking holes 5, 5 of the mounting plates 4, 4 of the bracket 3.
4 are formed facing each other, and a removable stopper pin 15 is inserted into a selected one of the communicating holes 14, 14 and the locking holes 5, 5. Further, mounting plates 16, 16 are integrally fixed to the left and right lower ends of the connection frame 1,
Lower connecting rods 17, 17 are horizontally fixed to the lower ends of the left and right mounting plates 16, 16. Lower link connecting portions 18, 18 are formed at both ends of the left and right lower connecting rods 17, 17, and working machine connecting portions 19, 19 are formed at the intermediate portions.
are formed, and single guide edges 20, 20 are formed on the upper and rear edges of the left and right mounting plates 16, 16 so as to be inclined inward.

Further, reference numeral 21 denotes an agricultural machine, and a case body 25 containing a built-in transmission 24 having an input shaft 23 is provided in the middle of the main frame 22 of this agricultural machine 21, and a mast 26 is erected on the upper part of the case body 25. An inverted U-shaped upper hit fitting 27 with an open lower surface and detachably connected to the upper connecting rod 9 is fixed to the upper end of the mast 26. Further, connecting arms 28, 28 are protruded toward the front lower part on both left and right sides of the main frame 22,
Lower hitch fittings 29, 29 are attached to the tips of the left and right connecting arms 28, 28. The left and right lower hitch fittings 29, 29 have inverted U-shaped locking fittings 30, 30 that are fixed to the tips of the connecting arms 28, 28 and open at the bottom. C-shaped lock arms 31, 31 are rotatably supported via support shafts 32, 32 on the upper side of the lock arms 30, and the locking portions 33, 33 at the tips of the lock arms 31, Ingredients 30, 30
The lock arms 31, 31 are inserted into vertical guide grooves 35, 35 formed in the rear pieces 34, 34 so as to be able to move forward and backward, and the lock arms 31, 31 are fitted with coil springs 36, 36 wound around the support shafts 32, 32. The locking portions 33, 33 are always engaged with the guide long grooves 35,
35 into the locking tools 30, 30. Further, a chain case 37 and a bracket (not shown) are connected to both left and right ends of the main frame 22 facing each other.
7 and the lower end of the bracket.
The rotary work body 38 is rotatably connected to the transmission 24 via a moving medium such as an output shaft in the main frame 22 and an endless chain in the chain case 37.
A cover body 39 covering the upper part of the rotary work body 38 is fixed between the chain case 37 and the bracket, and a grounding plate 40 is elastically supported at the rear end of the cover body 39 so as to be movable up and down.

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

Depending on the working conditions in the field or the relationship between the agricultural machine and the tractor that pulls it,
The top link connector 10 is set in a free state or a locked state with respect to the bracket 3 of the connection frame 1. That is, the top link connector 10
When the top link connector 10 is placed in the bracket 3 in a free state in the longitudinal direction with respect to the horizontal portion 2 of the connecting frame 1, the stopper pin 15 is not used, and when the top link connector 10 is set in a locked state at a predetermined position. For the communication holes 14, 14 of the top link connector 10 in the state of being arranged in a longitudinally inclined or vertical manner and the locking holes 5, 5 at selected positions among the locking holes 5, 5 of the bracket 3. The stopper pin 15 is inserted through the stopper pin 15, and a locking pin 15a is inserted into the protruding end of the stopper pin 15 from a direction perpendicular thereto to prevent it from coming out. This results in
The top link connector 10 is locked against rotation to the bracket 3 via a stopper pin 15.

Next, the tip of the top link B of the tractor A is rotatably connected to the mounting holes 13, 13 at predetermined positions of the top link connector 10 via a connecting pin, and the left and right lower connecting rods of the connecting frame 1 are connected. Lower link connecting portion 18 in 17, 17,
18, left and right lower links C, C of the tractor A
The tips of the two are rotatably connected. As a result, the connecting frame 1 is connected to the top link B and lower links C and C of the tractor A, and suspended in a predetermined position.

Next, the tractor A is moved backward toward the agricultural machine 21, and the upper connecting rod 9 of the connecting frame 1 is attached to the lower part of the upper hitch fitting 27, and the left and right lower connecting rods 17, 17 are attached to the left and right lower hitch fittings 29, Tractor A at the lower part of 29.
stop retreating. Then, when the top link B and the left and right lower links C, C of the tractor A are rotated upward by the lift mechanism of the tractor A, the upper connecting rod 9 is engaged in the upper hitch fitting 27, and the left and right lower The work equipment connecting parts 19, 19 of the connecting rods 17, 17 are connected to the left and right lower hitch fittings 29, 2.
9. These left and right lower connecting rods 17,
17, the work equipment connecting portions 19, 1
9 is the locking part 33, 33 of the lock arm 31, 31
When the lock arm 31,
31 is rotated outward against the coil springs 36, 36, and the working machine connecting parts 19, 19 are connected to the locking part 3.
3, 33, the lock arms 31, 33 are moved by the return force of the coil springs 36,
31 is rotated back, and its locking portions 33, 33 are automatically projected again from inside the guide long grooves 35, 35 into the locking tools 30, 30, and the work machine is connected by the locking portions 33, 33. The parts 19, 19 are prevented from coming off.
Thereby, the agricultural machine 21 is connected to the three-point suspension mechanism of the tractor A via the connection frame 1 in a state where a predetermined lift amount is obtained. Further, a universal joint is interlocked between the power output shaft of the tractor A and the input shaft 23 of the agricultural machine 21 to connect a power transmission shaft having both ends. As the agricultural machine 21 is towed by the tractor A, the rotary work body 38 is rotated by the power input from the power output shaft of the tractor A to the input shaft 23, and thereby the rotary work A predetermined operation is performed using the body 38.

Next, another embodiment of the present invention will be described based on FIG.

In this embodiment, the explanation of the parts common to the previous embodiment will be omitted, and the different parts will be explained.Locking holes 41, 41 are provided at one side of the left and right mounting plates 4, 4 of the bracket 3. A guide piece 43 having a shape having guide holes 42 communicating with the locking hole 41 at a predetermined interval is fixed to one of the mounting plates 4 formed opposite to each other and having one of the locking holes 41, A small-diameter shaft portion 45 of a stopper pin 44 is inserted into the guide piece 43 from the locking hole 41 into the communication holes 14, 14 of the top link connector 10 so as to be freely retractable.
As a result, the guide hole 42 of the guide piece 43 is inserted between the large-diameter stopper pin 44 and the large diameter stopper pin 44 when the pin is pulled out.
A step portion 46 is formed to prevent it from coming off.
Further, a protrusion 47 is horizontally protruded from the other side of the one mounting plate 4, and a support shaft 4 is attached to the tip of the protrusion 47.
A base end portion of a handle 49 is rotatably attached to the base end of the handle 49 via a support shaft 50, and a distal end portion of a small diameter shaft portion 45 of the stopper pin 44 is rotatably attached to the middle of the handle 49 via a support shaft 50. A coil spring 51 is stretched between the base end side of the handle 49 and the one mounting plate 4. Further, the lower end of the top link connector 10 is pivotally attached to a rotation center shaft 52 that is horizontally suspended between the lower ends of the left and right mounting plates 4, 4 of the bracket 3 so as to be rotatable in the front and rear directions.

With this structure, when the top link connector 10 is to be freed within the bracket 3, when the handle 49 is rotated outward about the support shaft 48 against the coil spring 51, The stopper pin 44 is removed from the communication holes 14, 14 and the locking hole 41 of the top link connector 10, and the top link connector 10 is removed from the bracket 3.
It becomes freely rotatable about the rotation center axis 52 within the center. In this case, the handle 49 is locked by a locking means (not shown) with the stopper pin 44 pulled out. In addition, when the top link connector 10 is set in a locked state at a predetermined position, the communication hole 14 of the top link connector 10 in a state where the top link connector 10 is arranged in a longitudinally inclined manner or vertically,
14 into the locking hole 41 by operating the handle 49. This results in
The top link connector 10 is locked against rotation to the bracket 3 via a stopper pin 44.

[Effect of idea]

According to the present invention, since the top link connector is rotatably provided at the top of the connection frame and can be fixed at a set position, it is possible to easily obtain the necessary lift amount for the agricultural machine at the top link connection of the tractor. It is also possible to provide a highly versatile agricultural machine coupling device that can perform agricultural work that fully corresponds to changes in working conditions such as on sloped land, and can therefore perform a wide range of agricultural work.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a side view showing a state in which a farm work machine is connected to a tractor using a farm work machine coupling device, Fig. 2 is an exploded perspective view of the same, and Fig. 3 is an exploded perspective view of the same. Figure 1 is a sectional view taken along line a to a, Figure 4 is a side view showing the top link connector in a free state, and Figure 5 is a perspective view of the locking mechanism of the top link connector showing another embodiment. be. 1...Connection frame, 2...Horizontal part at the top,
3... Bracket, 9... Upper connecting rod, 10...
Top link connector, 15, 44...stopper pin, 17...lower connecting rod, 21...agricultural machine,
27... Upper hitch fitting, 29... Lower hitch fitting, A... Tractor, B... Top link, C...
...Lower link.

Claims (1)

[Claims for Utility Model Registration] (1) In an agricultural machine coupling device for coupling a mountain-shaped coupling frame to a three-point suspension mechanism of a tractor and for coupling an agricultural machine to the coupling frame, the top of the coupling frame is provided with the An agricultural machine coupling device characterized in that a top link coupling device for coupling a top link of a tractor is rotatably provided and fixed at a set position. (2) The top link connector is mounted in a bracket provided at the top of the connection frame so as to be rotatable in the front and back direction and fixed in a set position with a stopper pin that can be inserted and removed. An agricultural machine coupling device according to claim 1 of the patent registration claim.