JPH0316410Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an agricultural machine coupling device, and more particularly, to a device used for coupling various types of working machines to a suspension mechanism of a tractor.

[Conventional technology]

Conventionally, in this type of agricultural machine coupling device, for example, a coupling frame is formed into a mountain shape, and a lower link of a tractor and a lower arm of a working machine are attached to the lower end of an extending portion extending downward on both sides of the coupling frame. A connecting portion for connecting is provided, a pair of mounting plates are fixed to the top of the connecting frame facing each other, and a connecting hole for connecting the top link of the tractor is formed in the upper part of the pair of mounting plates;
There is a structure in which a guide plate is protruded from the rear of the pair of mounting plates, and a connecting rod for connecting the top arm of the working machine is integrally suspended between the pair of guide plates.

[Problem that the invention attempts to solve]

The conventional structure described above requires a guide plate formed on the top of the connecting frame via a pair of mounting plates and a connecting rod horizontally suspended between the opposing guide plates, resulting in a large number of parts and a complicated structure. Moreover, there are problems such as increased costs.

Therefore, the present invention was created in view of the above points, and it is possible to connect the working machine to the connecting frame without using the pair of guide plates and the connecting rod,
The purpose is to simplify the overall structure and to be able to provide it at low cost.

[Means for solving problems]

The present invention is a connecting frame that is interposed between a tractor and a working machine and connects them to each other. A connecting shaft is provided to connect the lower arm of the working machine, and a linear connecting locking part is formed at the top of the connecting shaft to directly connect and locking the top arm of the working machine, and the top link of the tractor is connected to this connecting locking part. A connecting member is provided for connection.

[Operation] By having the present invention configured as described above, the connecting member of the connecting frame is connected to the top link of the tractor, and the connecting portion of the connecting frame is connected to the lower link of the tractor via the lower pin. Thereby, the connection frame is connected and suspended on the three-point suspension mechanism of the tractor. Then, by the three-point suspension mechanism, when the connecting frame is brought into contact with the tips of the top arm and lower arm of the working machine and raised, the connecting shaft of the connecting frame is inserted into the hitch fitting of the lower arm, and the connecting shaft of the top arm is The connection locking portions at the top of the connection frame are simultaneously engaged and locked in the hitch fittings. Thereby, the working machine is connected to the tractor via the connection frame.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes a connecting frame formed by bending a rod-like member with a rectangular cross section into a substantially mountain shape. A substantially triangular connecting plate 3 is vertically and integrally attached to the lower end of the section 2, and lower links B as a suspension mechanism for the tractor A are detachably connected to the front parts of the connecting plates 3 on both sides. A lower pin 4 serving as a connecting portion is installed horizontally in the lateral direction. Further, a connecting shaft 7 for removably connecting an inverted U-shaped lower hitch fitting 6 protruding from the front side of the working machine 5 is attached horizontally to the rear portions of the connecting plates 3 on both sides. .
Further, an inverted U-shaped upper hitch fitting 8 is provided on the top of the connection frame 1 and protrudes from the front part of the work machine 5.
A linear connecting locking part 9 is formed horizontally to removably connect the connecting member 1.
0 is mounted so as to be movable in the axial direction. The connecting member 10 is composed of a connecting fitting 12 having a planar H shape with a spacing plate 11 in the middle, and a pair of clamping tools 13 for the connecting fitting 12. An engagement recess 15 that engages with the connection locking portion 9 in the connection plate portion 14
Screw holes 16 are formed above and below this engagement recess 15, and a plurality of screw holes 16 are formed for connecting the top links C of the tractor A to the upper and lower sides of the opposing thin plate-like portion 17 on the opposite side to the connecting plate portion 14. Mounting hole 1
8 are formed, and the pair of clamping tools 13 that abut the connecting plate portion 14 have an engaging recess 19 that engages with the connecting locking portion 9, and an engaging recess 19 that communicates with the screw hole 16 above and below the engaging recess 19. A communicating hole 20 is formed. The connecting fitting 12 is fitted into the front side of the connecting locking part 9 through the engaging recess 15, and the pair of clamping tools 13 are fitted into the engaging recess 19 of the connecting fitting 12.
The bolts 22 are fitted into the rear side of the connecting and locking part 9 through the screw holes 20 and 16 of the pair of clamping tools 13 through the washers 21, and thereby the connecting members 10 is attached to the connecting locking portion 9 in a state in which rotation is prevented by their mutual cross-sectional shapes, and the upper hitch fitting 8 is fitted and locked in the connecting locking portion 9 between the connecting plate portions 14. It is becoming more and more common.

Next, the lower hitch fittings 6 on both sides are fixed to the tips of lower arms 23 that protrude forward from the lower sides on both sides of the working machine 5. The lower hitch fittings 6 on both sides are formed into a substantially inverted U-shape with their lower surfaces open, and hold the connecting shaft 7 in a curved continuous portion between the front piece 24 and the rear piece 25. At the same time, an engagement guide piece 27 is integrally provided below the rear piece 25 and extends downwardly from the lower edge of the front piece 24. A vertically long guide hole 28 is bored in the upper part of the guide piece 27. Further, a mounting rod 30 is horizontally suspended between the lower arm 23 and the mounting pieces 29 protruding from the upper part of the lower hitch fittings 6 on both sides, and a release lever 31 is rotatably mounted on the mounting rod 30. A lock arm 32 formed in a substantially C-shape is integrally formed at the lower part of this release lever 31, and an arc-shaped locking part 33 at the lower end of this lock arm 32 is inserted from the guide hole 28 into the opening of the holding part 26. The release lever 31 is removably engaged with a stopper 34 attached to the mounting piece 29. Further, the coil spring 35 wound around the mounting rod 30 is locked at one end to the release lever 31 and at the other end to the lower arm 23.
5, the lock arm 32 is always energized,
The locking portion 33 projects from the guide hole 28 into the opening of the holding portion 26 and locks the connecting shaft 7 inserted into the holding portion 26 from below. Further, the lower links B on both sides are pivoted up and down in an arc around a pivot point by a hydraulic drive mechanism of the trunk.

The upper hit fitting 8 is fixed to the tip of a top arm 36 that projects forward from the upper center of the working machine 5. The upper hitch fitting 8 is formed into a substantially inverted U-shape with its lower side open, and holds the connection locking portion 9 in a curved continuous portion between the front piece 37 and the rear piece 38. Holding part 3
9 is formed, and an engagement guide piece 40 is integrally provided below the rear piece 38 and extends long downward from the lower edge of the front end piece 37.

Next, the working machine 5 is provided with a transmission 41, and an input shaft 42 of the transmission 41 is rotatably protruded forward. The transmission 41 is provided in the middle of a main body frame 43 of the working machine 5, and a chain case 44 and an upper part of a bracket are integrally fixed to both ends of the main body frame 43. A rotary work body 45 is rotatably supported between the lower ends via its tilling shaft 46. The rotary work body 45 also connects the transmission shaft and chain case 4 to the transmission 41.
They are interlocked and connected via interlocking media such as chains in 4. In addition, in the figure, 47 is a cover body that covers the upper part of the rotary work body 45, and 48 is a flat plate that is provided to be vertically movable.

In this structure, the lower pins 4 at both lower sides of the connecting frame 1 are rotatably connected to the lower links B on both sides of the tractor A, and the connecting members at the upper part of the connecting frame 1 are connected to the top links C of the tractor A. The mounting holes 18 at selected positions in 10 are rotatably connected via a connecting pin. As a result, the connecting frame 1 is connected to the tractor's 3
Connected to a point suspension mechanism.

Next, when the tractor is driven backwards with the connecting frame 1 lowered by the three-point suspension mechanism in correspondence with the upper hitch fitting 8 and the lower hitch fitting 6 of the working machine 5, the connecting shafts on both sides of the connecting frame 1 are lowered. 7 comes into contact with the engagement guide piece 27 of the lower hitch fitting 6 of the working machine 5, and the connection locking part 9 at the top of the connecting frame 1 contacts the upper hitch fitting 8 of the working machine 5.
The connecting shaft 7 and the connecting locking part 9 of the connecting frame 1 are disposed in contact with the engagement guide piece 40 of the connecting frame 1 or in the lower part of the upper hitch fitting 8 and the lower hitch fitting 6. Then, operate the hydraulic drive mechanism of the tractor,
When the top link C and the lower links B on both sides are rotated upward about the rotation fulcrum provided on the tractor side, the connection frame 1 connected to the tip thereof is raised in an arc shape, and the connection shafts at the bottom of both sides are raised. 7 is guided by the engagement guide piece 27 and holds its holding portion 26
At the same time, the connection locking part 9 at the top of the connection frame 1 is guided by the engagement guide piece 40 and engaged in the holding part 39 thereof. At this time, the lock arms 3 are held elastically in the lower hitch metal fittings 6 on both sides.
The second locking portion 33 is protruded so as to be freely retractable.
The connecting shaft 7 rises while pushing back the locking portion 33 due to its pulling force, so after the connecting shaft 7 passes, the locking portion 33 automatically rotates back to its original position due to the restoring force and is held. It protrudes from the lower part of the connecting shaft 7 located in the section 26 and locks it. Further, an input shaft 42 is connected to the power mounting shaft portion of the tractor A via a power transmission shaft.

Then, the work equipment 5 is towed by the tractor A, and the input shaft 43 is rotated in conjunction with the power transmission shaft connected to the power output shaft of the tractor A, and rotary work is performed by the transmission 41 via the interlocking medium. The body 45 is driven to rotate. As a result, the field is tilled and crushed by the rotary work unit 45.

Next, if the work implement 5 is to be connected to the tractor A in a deviated manner due to reasons such as working conditions in the field, loosen each bolt 22 of the connecting member 10 and tighten the connecting locking part 9. Clamped connecting fittings 12
The strong connection between the and the clamping tool 13 is released, the connecting member 10 is moved to a desired position in the width direction of the connecting locking part 9, and each bolt 22 is strongly tightened again. As a result, the connecting member 10 is moved and fixed to a desired position, and the connecting locking portion 9 and the engaging recesses 15 and 19 that sandwich the connecting locking portion 9 are formed with a square cross section and are not circular in cross section. This does not rotate around the axis. After the connecting member 10 has been moved, the upper hitch fitting 8 is engaged and locked to the connecting locking portion 9 between the connecting plate portions 14 or the connecting locking portion 9 on one side of the connecting member 10 as described above. be able to.

Next, in the embodiment described above, the connection frame 1 is formed of a rod-shaped member having a rectangular cross section. However, the connection frame 1 is not limited to this.
As shown in the figure, a connection consisting of a pair of mounting plates 50 formed by bending a round bar member with a circular cross section into a mountain shape and facing a connection locking portion 9 formed at the top of the connection frame 1. The members 10 are fixed together, and mounting holes 52 are formed above and below the connecting pieces 51 on the front side of the pair of mounting plates 50, and a guide piece is expanded outward at the rear upper part of the pair of mounting plates 50. 53, and the upper hitch fitting 8 may be directly engaged and locked in the connection locking portion 9 between the pair of mounting plates 50.

[Effect of idea]

According to the present invention, since the connecting locking part is formed at the top of the connecting frame, the top arm of the working machine can be directly connected to this connecting locking part.
To omit the conventional connecting rod for connecting the top arm to the connecting frame and the mounting member for horizontally mounting this connecting rod, and to simplify the overall structure by reducing the number of these parts. This allows it to be provided at a low cost.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a side view of the agricultural machine and the coupling device connected, Fig. 2 is an exploded perspective view of the above coupling device, and Fig. 3 is the top arm connected state. FIG. 4 is a plan view showing the moving state of the connecting member, and FIG. 5 is a perspective view of a connecting device showing another embodiment. DESCRIPTION OF SYMBOLS 1... Connection frame, 4... Connection part, 5... Work equipment, 7... Connection shaft, 9... Connection locking part, 10...
...Connecting member, 23...Lower arm, 36...Top arm, B...Lower link, C...Top link.

Claims (1)

[Claims for Utility Model Registration] (1) A connecting frame that is interposed between a tractor and a working machine and connects them to each other, the connecting frame is formed into a substantially mountain shape, and the lower portions of both sides of the connecting frame are provided with the parts of the tractor. A connecting portion connecting the lower link and a connecting shaft connecting the lower arm of the working machine are provided, and a linear connecting locking portion that directly connects and locks the top arm of the working machine is formed at the top of the connecting shaft, and this connecting locking portion is provided. An agricultural machine coupling device characterized in that a coupling member for coupling the top link of the tractor is provided at the section. (2) The agricultural machine connection according to claim 1 of the utility model registration claim, wherein the connection member is connected to the connection frame having a rectangular cross-section connection locking part so as to be movable in the axial direction. Device.