JP3532022B2 - Work machine coupling device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work machine connecting device.

[0002]

2. Description of the Related Art Conventionally, there is no publicly known publication, but as shown in FIG. 9, a mounting mechanism having a top link, a lower link and the like is provided at a front portion or a rear portion of an agricultural tractor, and the mounting mechanism has an upper engaging portion. And a lower engaging portion, an intermediate connecting member is attached, and a working machine side upper engaging portion with which the upper engaging portion engages and a working machine side lower engaging portion with which the lower engaging portion engages. And a work machine side mounting member having a base part rotatably mounted on the work machine base part side, and the work machine side mounting member is tilted and erected between the upper end of the work machine side mounting member and the work machine. Is provided with a gap adjusting device A that can be brought into a state, and the gap adjusting device A is a slide member on which one side member C having a lock shaft B provided on the working machine side and the lock shaft B provided on the working machine side mounting member move. In the structure constituted by the other side member E having the moving groove D, the sliding A locking groove F is connected to the groove D in a key shape, and a C-shaped displacement metal fitting G for displacing the lock shaft B between the sliding groove D and the locking groove F is attached to the other side member E. The displacement fitting G is provided with a handle I for pivoting the displacement fitting G, and a spring J for urging the fitting G so that the lock shaft B is positioned in the locking groove F. Work implement coupling devices are known.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The known example is a spring J
Since the displacement metal fitting G is biased so that the lock shaft B is located in the lock groove F, the operation of the handle I is heavy,
There is a problem in operability. Further, since the lock shaft B simply moves in the sliding groove D, there is a problem that the movement is not smooth.

[0004]

It is an object of the present invention to reduce the operation load, improve the operability, and smooth the operation.

[0005]

According to the present invention, a mounting mechanism 1 having a top link 3 and a lower link 4 is provided at a front portion or a rear portion of an agricultural tractor, and the mounting mechanism 1 has an upper portion on a main body side. An intermediate coupling member 5 having an engaging portion 7 and a main body side lower engaging portion 8 is attached, and the work machine side upper engaging portion 11 and the main body side lower portion with which the main body side upper engaging portion 7 engages. Working machine side attachment member 1 having a working machine side lower engaging section 12 with which the engaging section 8 engages
No. 0 base is rotatably attached to the base side of the working machine 2, and the working machine side mounting member 10 is tilted and erected between the upper end of the working machine side mounting member 10 and the working machine 2. A gap adjusting device 15 is provided, and the gap adjusting device 15 has one side member 20 having a lock shaft 28 provided on one side of the working machine side mounting member 10 or the working machine 2 and the working machine side mounting member. 10 or the sliding groove 2 provided on the other side of the working machine 2 for moving the lock shaft 28.
5, the one side member 20 and the other side member 22 are slidably inserted into each other, and the center of the lock shaft 28 moves in the sliding groove 25. A regular circular locking groove 26 whose center is located on the line is communicated, the lock shaft 28 is rotatably attached to the one-side member 20, and the lock shaft 28 is slidable in the sliding groove 25. A handle 32 that forms a lock surface 30 that abuts the shaft 29 and the inner peripheral surface of the locking groove 26 and that rotates the lock shaft 28 is provided, and the handle 32 has a pair of legs 33.
Formed in a shape, the lock shaft 28 is movable in the axial direction
And one of the leg portions 33 and the one side
The other leg is attached to the lock shaft 28 between the side surfaces of the member 20.
A spring 37 for abutting 33 on the side surface of the one-side member 20.
One side member 20 on the side on which the other leg 33 is wound
Is a working machine connecting device having a protrusion 38 on its side surface. The present invention is a working machine connecting device in which at least one of the one side member 20 and the other side member 22 is formed in a square tube shape.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
Is a mounting mechanism for mounting various working machines 2 provided on the rear or front of the agricultural tractor, and the specific configuration of the mounting mechanism 1 is not a requirement, and its tip may be raised or lowered.
It is composed of one top link 3 and two lower links 4, etc., and the lower link 4 is vertically rotatable by a hydraulic device provided at the rear part of the agricultural tractor.

The top link 3 and the lower link 4
When the work implement 2 is attached to the tip of the work implement 2
An intermediate connecting member 5 is provided between the mounting mechanism 1 and the mounting mechanism 1. That is, since the mounting mechanism 1 is different for each manufacturer, the intermediate connecting member 5 is different from the mounting mechanism 1 that is different.
The work machine 2 can be mounted with the interposition of. Therefore, the intermediate connecting member 5 is provided with a plurality of mounting holes 6 and the like at positions corresponding to the mounting mechanisms 1 of the respective companies, but may have the main body side upper engaging portion 7 and the main body side lower engaging portion 8. Other configurations are not a requirement.

[0008] Thus, wherein the working machine 2 side, providing the working machine side mounting member 10 for mounting the intermediate connecting member 5.
Although not shown, the working machine side mounting member 10 is formed by combining shaft members in a triangular shape in a front view, and the main body side upper engaging portion 7 engages with the upper part of the working machine side mounting member 10. A side upper engagement portion 11 is provided, and a work machine side lower engagement portion 12 with which the main body side lower engagement portion 8 engages is provided at a lower portion of the work machine side attachment member 10. The working machine side lower engaging portion 12 is formed by a shaft member, and the lower side engaging portion 12 is the working machine side mounting member 10.
It also serves as a mounting shaft for rotatably mounting the lower part of the working machine 2 to this, but this point is not a requirement either, and the working machine side mounting member 10 is rotatably mounted, and the main body side lower engaging portion 8 It suffices if there is a working machine side lower engaging portion 12 with which Further, in the embodiment, the main body side upper engaging portion 7 and the main body side lower engaging portion 8 are in the engagement groove shape, and the working machine side lower engaging portion 12 and the working machine side upper engaging portion 11 are in the axial shape. Although formed, the configuration may be reversed.

A space adjusting device 15 is provided between the upper part of the working machine side mounting member 10 and the working machine 2. The interval adjusting device 15 is provided when the work implement 2 is mounted on the tractor.
The working machine side mounting member 10 to expand the gap between the upper and the working machine side attachment member 10 and the working machine 2 is rotated to the mounting mechanism 1 side in the inclined state, your body side upper engaging portion 7 by this Yo
So that the main body side lower engaging portion 8 and the main body side lower engaging portion 8 easily engage with the working machine upper side engaging portion 11 and the working machine side lower engaging portion 12 , respectively.
And, also, the working machine 2 of the post-mounting working machine 2 and the working machine side attachment member working machine side attachment member 1 a gap between the upper narrow to 10
The work posture of the working machine 2 is made proper by making 0 stand up.

At a position above the base of the working machine 2 , a space adjusting device is provided.
The horizontal cylindrical portion 16 of the mount 15 is rotatably attached by the one-side pin 17, and the base portion of the screw shaft 18 in the front-rear direction is fixed to the horizontal cylindrical portion 16, and the screw shaft 18 has a screw hole.
The front and rear cylindrical portions 19 are fixed to the one side member 20 by screwing them in and out freely. Therefore, the base portion of the one side member 20 is rotatably attached to the working machine 2 side by the one side pin 17. Reference numeral 21 is a stopper nut for fixing the screw shaft 18 in and out. The one-side member 20 is formed in a tubular shape, the distal end side of the other-side member 22 is slidably inserted into the one-side member 20, and the base of the other-side member 22 is on the other side above the working machine-side mounting member 10. The side pin 23 rotatably pivotally mounts. 24 is the other pin 2 formed on the other member 22
It is an insertion hole through which 3 is inserted.

The other side member 22 is formed with a sliding groove 25 which is long in the sliding direction and a locking groove 26 which is wider than the sliding groove 25 and communicates with the end of the sliding groove 25. An insertion hole 27 that can overlap the locking groove 26 is formed on the tip side of the one-side member 20, and a left and right lock shaft 28 is inserted into the overlapped insertion hole 27 and locking groove 26. The lock shaft 28 has a sliding shaft portion 29 having the same diameter as the locking groove 26 but a part thereof is cut out in parallel with the generatrix direction to have the same width (same thickness) as the sliding groove 25 in the middle portion. Both end surfaces of the sliding shaft portion 29 are formed into arcuate lock surfaces 30 that are in sliding contact with the inner circumference of the lock groove 26. That is, the relationship between the sliding groove 25 and the locking groove 26 is arranged such that the center of the locking groove 26 is located on the line along which the center of the lock shaft 28 moves, and the sliding groove 25 and the locking groove 26 are communicated with each other. When the sliding shaft portion 29 of 28 slides in the sliding groove 25 and rotates in the locking groove 26, the locking surface 30 abuts the inner peripheral surface of the locking groove 26, and the sliding shaft portion 29 moves. The one side member 20 and the other side member 22 are locked so as not to return to the sliding groove 25.

Fitting holes 31 are formed at both ends of the lock shaft 28, and a pair of leg portions 33 of a U-shaped handle 32 are fitted into the fitting holes 31 and fixed by pins 34. The lock shaft 28 is provided movably in the axial direction, and the leg portion 33
One of the leg portions 33 and the one side surface 3 of the one side member 20
A spring 37 that causes the other leg portion 33 to abut on the other side surface 36 of the one side member 20 is wound around the lock shaft 28 between 5 and the other side surface 36 has a protrusion that restricts the rotation of the leg portion 33. 38 is provided. As described above, the interval adjusting device 15 is configured by the one-side member 20, the other-side member 22, and the lock shaft 28, and the handle 32 or the spring for urging the lock shaft 28 to the locked state is not necessary, and the handle 32 is operated. Lighten. 39 is a rear plate of the working machine 2, 40 is a side plate, 41 is a sled,
Reference numeral 42 denotes a blade used for removing snow, etc., and the working machine 2 of this embodiment is called a leveling carrier by those skilled in the art.

[0011]

[Operation] Next, the operation will be described. The intermediate connecting member 5 is attached to the mounting mechanism 1 provided on the agricultural tractor. The base portion of the working machine side mounting member 10 is rotatably mounted on the working machine 2 by the working machine side lower engaging portion 12, and the upper part of the working machine side mounting member 10 and the working machine 2 are connected by a gap adjusting device 15. To do. That is, the horizontal cylindrical portion 16 of the interval adjusting device 15 is pivotally attached to the working machine 2 by the one-side pin 17, and the base portion of the other-side member 22 is pivotally attached to the upper part of the working-machine-side mounting member 10 by the other-side pin 23. Next, when the handle 32 is erected, the lock shaft 28 rotates in the insertion hole 27 of the one side member 20, and the sliding shaft portion 29 of the lock shaft 28 rotates in the locking groove 26 of the other side member 22. Since the sliding shaft portion 29 of the lock shaft 28 is slidable in the sliding groove 25, the other side member 22 extends with respect to the one side member 20.

When the other side member 22 extends with respect to the one side member 20, the working machine side mounting member 10 rotates about the working machine side lower engaging portion 12 toward the mounting mechanism 1 side. Therefore, the work machine side upper engaging portion 11 of the work machine side mounting member 10
That is, the working-machine-side lower-side engaging portion 12 is displaced to the front and rear in a side view. And the tower in agricultural tractor in this state, the mounting mechanism 1 is pivoted downward by operating the hydraulic system of the agricultural tractor, body
When the height of the side upper engaging portion 7 is set to a position slightly lower than the working machine side upper engaging portion 11 and the rear side is retracted as it is, the main body side upper engaging portion 7 does not engage with the working machine side upper engaging portion 11, but is lowered. Go to position. In this state, when the hydraulic device is operated to move the mounting mechanism 1 upward, the main body side upper engaging portion 7 engages with the working machine side upper engaging portion 11 from below.

When the main body side upper engaging portion 7 is engaged with the work implement side upper engaging portion 11, the work implement side lower engaging portion 12 and the main body side
Since there is a predetermined gap between the lower engagement portion 8 and the lower engagement portion 8, when the mounting mechanism 1 moves the intermediate coupling member 5 upward, the working machine side mounting member 10 and the working machine 2 are separated. The work machine side upper engaging portion 11 is rotated, the work machine side lower engaging portion 12 engages with the main body side lower engaging portion 8, and the intermediate connecting member 5 and the work machine side attaching member 10 are connected. Is completed. That is,
Since the body side upper engaging portion 7 and the body-side lower engaging portion 8 is set to engage the working machine side lower engaging portion 12 and the respective working machine side upper engaging portion 11, the body side upper Engagement part 7 and body side
The interval between the lower engaging portion 8 and the interval between the working machine side upper engaging portion 11 and the working machine side lower engaging portion 12 are the same, and the working machine side mounting member 1
When 0 rotates around the working machine side upper engaging portion 11, the working machine side lower engaging portion 12 engages with the main body side lower engaging portion 8,
It is locked by an arbitrary locking mechanism provided on the side lower engaging portion 8 side. In this case, when the work implement side upper engagement portion 11 and the work implement side lower engagement portion 12 are positioned in the vertical state, the main body side upper engagement portion 7 is engaged with the work implement side upper engagement portion 11. Although it is troublesome to perform, since the space adjusting device 15 is extended and the working machine side upper engaging portion 11 and the working machine side lower engaging portion 12 are displaced forward and backward, the intermediate coupling member 5 and the working machine side mounting are attached. It facilitates the connection of the members 10.

When the connection between the intermediate connecting member 5 and the working machine side mounting member 10 is completed, the mounting mechanism 1 lowers the intermediate connecting member 5, and the tip of the working machine 2 comes into contact with the ground. The one-side pin 17 of the working machine 2 rotates around the working machine side lower engaging portion 12 toward the working machine side mounting member 10. Therefore, the gap between the one-side pin 17 and the other-side pin 23 becomes narrower, so that the sliding shaft portion 29 of the lock shaft 28 provided on the one-side member 20 of the gap adjusting device 15 is used for sliding the other-side member 22. By sliding in the groove 25, the sliding shaft portion 29 reaches the locking groove 26 of the other member 22. When the handle 32 is rotated in this state, the lock shaft 28 rotates in the lock groove 26, the lock surface 30 contacts the inner peripheral surface of the lock groove 26, and the other side member 22 and the one side member 20. Lock and. When the lock shaft 28 is locked, the leg portion 33 of the handle 32 rides over the protrusion 38 and the lock shaft 28 is biased toward the side opposite to the protrusion 38 by the spring 37, so that the handle 32 is securely fixed.

In this case, the spring 37 does not act in the rotation direction of the lock shaft 28, and the handle 32 is rotated only by the contact resistance between the insertion hole 27 and the inner peripheral surface of the lock groove 26 and the lock surface 30. Very easy to operate and improve operability. Further, the elasticity of the spring 37 does not need to be so strong, and even if the handle 32 and the spring 37 are made thin, the strength is not affected, so that the weight can be reduced. One side member 20
Since the other-side member 22 is slidably inserted into the sliding member, the one-side member 20 and the other-side member 22 serve as mutual guide members, and the sliding shaft portion 29 of the lock shaft 28 in the sliding groove 25 is provided.
Ensure the movement of. Then, when the space adjusting device 15 is locked in the contracted state, the working machine side mounting member 10 stands up and puts the working machine 2 in a working state. In this state, the screw shaft 18 moves in and out of the one side member 20. Then, the inclination of the work machine 2 with respect to the mounting mechanism 1 can be adjusted.

[0016]

According to the present invention, a mounting mechanism 1 having a top link 3 and a lower link 4 is provided at the front or rear of an agricultural tractor, and the mounting mechanism 1 has a main body side upper engaging portion 7 and a main body side lower portion. > The intermediate connecting member 5 having the engaging portion 8 is attached to the main body.
Work machine side upper engagement portion 11 with which the side upper engagement portion 7 engages and work machine side lower engagement portion 1 with which the main body side lower engagement portion 8 engages
And a base portion of a working machine side mounting member 10 having a base plate 2 and a working machine side mounting member 10.
Between the upper end of the work machine 2 and the working machine 2 , there is provided an interval adjusting device 15 that can make the working machine side mounting member 10 in an inclined state and an upright state.
Alternatively, the one side member 20 having the lock shaft 28 provided on one side of the working machine 2 and the working machine side mounting member 1
0 or the other side member 22 having a sliding groove 25 for moving the lock shaft 28 provided on the other side of the working machine 2, the one side member 2
0 and the other side member 22 are slidably inserted into each other, and the sliding groove 25 communicates with a regular circular locking groove 26 whose center is located on a line along which the center of the lock shaft 28 moves. The lock shaft 28 is rotatably attached to the one-side member 20, and the lock shaft 28 comes into contact with the sliding shaft portion 29 that can move in the sliding groove 25 and the inner peripheral surface of the locking groove 26. 30 together with the lock shaft 2
A handle 32 for rotating 8 is provided, and the handle 3
2 is formed in a U shape having a pair of legs 33,
The hook shaft 28 is movably provided in the axial direction, and
Between one of the leg portions 33 and the side surface of the one side member 20
The lock shaft 28 is provided with the other leg portion 33 on the one side member.
The spring 37 that abuts against the side surface of 20 is wound, and the other leg is
The protrusion 38 is provided on the side surface of the one-side member 20 on the side where the
Since the working machine coupling device is provided , when the lock shaft 28 is rotated in the locking groove 26, the locking surface 30
Comes into contact with the inner peripheral surface of the locking groove 26 to lock the other side member 22 and the one side member 20, and the handle 32 is inserted into the insertion hole 2
Since it can be rotated only by the contact resistance between the inner peripheral surface of 7 and the lock groove 26 and the lock surface 30, it can be operated very lightly,
This has the effect of improving operability . Also, an effect that it restricts the rotation of the handle 32. According to the present invention, the one-side member 20 and the other-side member 22 are working machine connecting devices in which at least one of them is formed in a square tube shape. It serves as a guide member, and has an effect of reliably moving the sliding shaft portion 29 of the lock shaft 28 in the sliding groove 25.

[Brief description of drawings]

FIG. 1 is a side view of a mounting mechanism and a working machine.

FIG. 2 is an exploded perspective view of the distance adjusting device.

FIG. 3 is a sectional view of the same.

FIG. 4 is a side view of the work machine in a mounted state.

FIG. 5 is a side view of the work machine in a mounted state.

FIG. 6 is a side view of the work machine in a mounted state.

FIG. 7 is a vertical sectional side view of the gap adjusting device in a locked state.

FIG. 8 is a vertical sectional side view of the gap adjusting device in a sliding state.

FIG. 9 is a vertical cross-sectional side view of a main part of a known gap adjusting device.

[Explanation of symbols]

1 ... Mounting mechanism, 2 ... Working machine, 3 ... Top link, 4 ... Lower link, 5 ... Intermediate connecting member, 6 ... Mounting hole, 7 ... Main body
Side upper engaging part, 8 ... main body side lower engaging part, 10 ... working machine side attaching member, 11 ... working machine side upper engaging part, 12 ... working machine side lower engaging part, 15 ... interval adjusting device, 16 ... Horizontal cylindrical portion, 1
7 ... One side pin, 18 ... Screw shaft, 19 ... Front and rear cylindrical portion, 2
0 ... One side member, 21 ... Nut, 22 ... Other side member, 2
3 ... pin on the other side, 24 ... insertion hole, 25 ... sliding groove, 26
... Lock groove, 27 ... Insertion hole, 28 ... Lock shaft, 29 ...
Sliding shaft portion, 30 ... Lock surface, 31 ... Fitting hole, 32 ... Handle, 33 ... Leg portion, 34 ... Pin, 35 ... One side surface, 36
... Other side surface, 37 ... Spring, 38 ... Protrusion, 39 ... Working machine 2
Rear plate, 40 ... Side plate, 41 ... Blade used for snow removal, A
... Interval adjustment device, B ... Lock shaft, C ... One side member, D ...
Sliding groove, E ... Other member, F ... Key-shaped locking groove, G
… Displacement fittings, H… Axis, I… Handle, J… Spring.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Junichi Kanzaki, 44, Hiraide Industrial Park, Utsunomiya City, Tochigi Prefecture 3 at Suzutec Co., Ltd. (72) Hiroshi Akizawa, 44, 3 Hiraide Industrial Park, Utsunomiya City, Tochigi Prefecture Suzutec Co., Ltd. (72) Inventor Kenji Kuroda 44, 3 Hiraide Industrial Park, Utsunomiya City, Tochigi Prefecture Suzutec Co., Ltd. (56) References Actual Development 5-15703 (JP, U) Actual Development Sho 53-42903 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A01B 59/043

Claims (2)

(57) [Claims] 1. A mounting mechanism 1 having a top link 3 and a lower link 4 is provided at a front portion or a rear portion of an agricultural tractor,
Attach the intermediate connecting member 5 having a body-side upper engaging portion 7 and the body-side lower engaging portion 8 to said mounting mechanism 1, the body side upper
Wherein the a working machine side upper engaging portion 11 which parts engaging portion 7 is engaged
A base portion of a work machine side mounting member 10 having a work machine side lower engagement portion 12 with which the body side lower engagement portion 8 engages is rotatably mounted on the base side of the work machine 2, and the work machine side mounting member is provided. Between the upper end of 10 and the working machine 2 , the working machine side mounting member 10 is provided.
Is provided with a space adjusting device 15 that can be tilted and upright, and the space adjusting device 15 is provided on either side of the working machine side mounting member 10 or the working machine 2
One side member 20 having the number 8 and the working machine side mounting member 10
Alternatively, the other side member 2 having the sliding groove 25 in which the lock shaft 28 provided on the other side of the working machine 2 moves
2 and the one side member 20.
And the other-side member 22 are slidably inserted into each other, and the sliding groove 25 is communicated with a regular circular locking groove 26 whose center is located on a line along which the center of the lock shaft 28 moves. The shaft 28 is rotatably attached to the one-side member 20, and the lock shaft 28 has a sliding shaft portion 29 that can move in the sliding groove 25 and a lock surface 30 that comes into contact with the inner peripheral surfaces of the locking groove 26. And the lock shaft 2
A handle 32 for rotating 8 is provided, and the handle 3
2 is formed in a U shape having a pair of legs 33,
The hook shaft 28 is movably provided in the axial direction, and
Between one of the leg portions 33 and the side surface of the one side member 20
The lock shaft 28 is provided with the other leg portion 33 on the one side member.
The spring 37 that abuts against the side surface of 20 is wound, and the other leg is
A protrusion 38 is provided on the side surface of the one side member 20 on the side where the 33 is provided.
The work machine connection device provided . 2. The one side member 20 according to claim 1.
At least one of the other side member 22 and the other side member 22 is a work machine connecting device formed in a rectangular tube shape.