JPH0775481B2 - Agricultural work machine connection device - Google Patents

Description

Description: [Object of the Invention] (Field of Industrial Application) The present invention relates to a farm work machine connecting device, and more particularly to a machine for connecting a farm work machine to an agricultural tractor.

(Prior Art) Conventionally, as this type of agricultural machine coupling device, for example,
There is a three-point suspension mechanism of a tractor that connects an agricultural work machine through a quick coupler.As a quick coupler in this case, for example, a connecting plate having engaging recesses in the left and right parts is fixed, A lock arm for lower pin locking is pivotally mounted on the left and right connecting plates with respect to the engaging recess, and a lock pin for locking and unlocking the rotation of the lock arm is provided on the left and right lock arms. There is a structure.

(Problems to be Solved by the Invention) In the above-mentioned structure, since the left and right lock arms need to be operated separately on the left and right, the operation is troublesome, and the left and right lock arms need to be operated when the lower pin is locked and when the lower pin is locked. It requires a complicated operation that must be performed each time when releasing, and therefore there are many inconveniences in the handling operation.

Therefore, the present invention has been made in view of such a problem, and enables the left and right lock arms to be simultaneously rotated, and the left and right lock arms can be rotated only when the lock is released to facilitate locking. Therefore, it is an object of the present invention to provide an agricultural work machine connecting device which can be easily released and can be easily handled.

[Structure of Invention]

(Means for Solving the Problems) The agricultural work machine connecting device of the invention of claim 1 is an agricultural work machine connecting device for connecting an agricultural work machine to a tractor via a quick coupler, wherein the quick couplers are provided on left and right portions of the connection frame. A connecting plate which is provided with a rear opening engaging recess in the rear part, and a passive plate which is provided in the lower part of the left and right connecting plates so as to be rotatable in the vertical direction via a support shaft and which projects into the engaging recess at the rear side. A rotation locking plate having a protrusion and a hook for locking the lower pin of the agricultural work machine engaged in the engagement recess, and vertically rotatable via a support shaft on the upper part of the left and right connecting plates. A lock arm that is provided on the lower part of the front side and has locking portions at the front and rear portions that lock the rotation locking plate in stages, and the locking portions of the lock arms that are attached to the support shafts of the left and right lock arms are always On the rotation locking plate side It is provided with a biasing spring and a handle which is interlocked with the left and right lock arms and which simultaneously rotates the left and right lock arms when the left and right lower pins are unlocked.

According to a second aspect of the present invention, there is provided the agricultural machine coupling apparatus according to the first aspect, wherein the left and right rotary locking plates are connected to the front and rear portions of the front upper portion when the locking portions of the front and rear portions of the lock arm are connected to the lower pin. An engagement portion that engages when the lower pin is locked is formed.

According to a third aspect of the present invention, there is provided the agricultural work machine connecting device according to the first or second aspect, wherein one extension portion of the left and right springs attached to the support shaft of the lock arm is locked to the lock arm, and the other one of the left and right springs is attached to the lock arm. The extension portion extends rearward and upward through the support shaft of the rotation locking plate, and a bent portion for engaging and disengaging the locking pin of the lock arm is formed at the upper end portion thereof.

(Operation) In the agricultural work machine connecting device according to the invention of claim 1, the left and right lower pins of the agricultural work machine enter into the engaging recesses of the left and right connecting plates, and the left and right lower pins cause the passive projections of the left and right rotary engaging plates to be tractors. When pushed toward the front part on the left side, the left and right rotation locking plates are rotated upwards around the support shaft against the spring and the hooks of the left and right rotation locking plates are also rotated. Are engaged with the left and right lower pins that have deeply entered the engaging recess. Also, with the rotation of the left and right rotation locking plates,
The left and right lock arms are rotated downward about the support shaft by the restoring force of the springs, and the locking portions of the left and right lock arms are engaged with the engaging portions of the left and right rotation locking plates that engage the hooks with the lower pins. Engaged. Therefore, the left and right lower pins are automatically engaged in the left and right engaging recesses, and the left and right lower pins are automatically locked by the left and right rotary locking plates and the lock arms.

Next, to unlock the left and right lower pins,
When the handle is operated, the left and right lock arms that are interlocked with the handle are simultaneously turned upward around the support shaft against the spring, and the locking portions of the left and right lock arms are rotated by the left and right rotation locking plates. The lock of the rotation locking plate is released by being disengaged from the engaging portion.

Then, in this state, by advancing the tractor, the left and right lower pins of the agricultural work machine are separated from the engaging recesses in the left and right connecting plates of the quick coupler, but at this time, when the left and right connecting plates are advanced, The left and right lower pins are separated from the inside of the engagement recess, and the left and right lower pins push the hooks of the left and right rotary locking plates to rotate the left and right rotary locking plates downward about the spindle. When moved, this hook disengages from the left and right lower pins, and the left and right lower pins are unlocked. When the left and right lower pins are disengaged from the left and right engaging recesses, the return force of the spring causes the left and right lock arms to rotate downward about the support shaft,
The rotation locking plate rotated downward is locked by the locking portion, and the passive projection of the rotation locking plate is locked in a state of protruding into the engaging concave portion to connect the next lower pin. Prepare

Further, in the agricultural working machine coupling device according to the invention of claim 2, since the front and rear portions of the front upper portions of the left and right rotary locking plates are formed with the engaging portions with which the front and rear locking portions of the lock arm are engaged. By the mutual engagement and locking, the left and right rotary locking plates are surely positioned when the lower pin is connected and when the lower pin is locked, and the lower pin is reliably connected and the lower pin is locked.

Further, in the agricultural working machine coupling device according to the third aspect of the present invention, the respective lock arms are biased by the left and right springs with respect to the rotation locking plate, and the rotation locking plate is surely held at the desired setting position by the lock arms. The locking pin of the lock arm is locked when it is locked and is rotated upward by the bent portion of the other extension of the left and right springs.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

1 to 3, reference numeral 1 denotes a quick coupler, which has a connecting frame 2 formed by bending a pipe material into a substantially mountain shape, and extends below the connecting frame 2. The connecting plates 3 are fixed to the lower end portions on both sides so as to face each other. The left and right connecting plates 3 are extended in the front-rear direction, and engaging recesses 4 that open rearward are formed at the rear ends of the left and right connecting plates 3, and the lower pins 5 are outwardly provided at the lower front ends of the left and right connecting plates 3. Is projected horizontally toward.

A rotation locking plate 7 is rotatably mounted on the lower rear portion of the outer side of the left and right connecting plates 3 via a support shaft 6 so as to be vertically rotatable. A substantially semi-circular engagement recess 8 is formed in the portion facing the engagement recess 4, and a passive projection 9 protruding into the engagement recess 4 is formed on the top of the engagement recess 8. At the same time, a hook 10 having a hook shape is formed in the lower portion of the locking recess 8. Further, an engaging projection 11 as an engaging portion and an engaging step portion 12 as an engaging portion are provided in series at the front and rear portions of the front upper portion of the left and right rotary engaging plates 7.

Further, a lock arm 14 is rotatably pivoted in the vertical direction through a support shaft 13 and an insertion hole 13a into which the support shaft 13 is inserted, on the upper rear side of the outer side portions of the left and right connecting plates 3 to lock the left and right locks. The engaging stepped portion 12 is provided on the front and rear portions of the lower front side of the arm 14.
Locking protrusion 15 as the locking portion that engages and disengages with the engaging protrusion
A locking step portion 16 as a locking portion for engaging and disengaging the 11 is continuously provided, and a locking pin 17 is projected in the vicinity of the rear end of the left and right lock arms 14. Further, a spring 18 is wound around the left and right support shafts 13 on which the left and right lock arms 14 are pivoted, and one extension portion 19 of the spring 18 is locked to the front upper portion of each lock arm 14. The other extension portion 20 of the spring 18 is folded back rearward and upward through the support shaft 6 to which the rotation locking plate 7 is attached to form a substantially U-shape, and the folded free rod portion 21 is It extends upward so as to block an intermediate portion of the engaging recessed portion 4, and the locking pin is provided at an upper end portion thereof.
A substantially semicircular bent portion 22 and a linear folded portion 23 that are removably engaged with the 17 are formed. The left and right springs 18 urge the left and right lock arms 14 to rotate downward about the support shaft 13, and the locking step portion 16 causes the left and right rotation locking plates 7 to engage with the engaging projections 11. It is elastically engaged so that it is engaged from above.

Next, a pair of connecting plates 24 are fixed to each other on the top of the connecting frame 2 at predetermined intervals, and mounting holes 25 are formed in front and rear portions of the upper portions of the pair of connecting plates 24. In addition, this pair of connecting plates 24
An engaging concave portion 26 that opens upward is formed in the upper part of the rear end.

Further, an insertion hole 27 is formed in the lower rear portion of the pair of connecting plates 24 so as to face each other, and one shaft rod portion 29 of the hanging metal fitting 28 formed in a U-shape is formed in the pair of insertion holes 27. The suspension metal fitting 28 is rotatably inserted, and the other shaft rod portion 30 is rotatably inserted into the insertion hole 33 of the pipe-shaped bearing body 32 of the interlocking rod 31. The shaft rods 29, 30 on both sides of the hanging metal fitting 28 are formed so as to face each other and are bent in parallel to the front and rear parts.
A washer 35 in the form of a narrow flat plate is inserted and locked to the base end portions of 9,30 through insertion holes 34 in the front and rear portions through which they are inserted, and insertion holes 27 for the shaft rod portions 29, 30 in the front and rear portions. A stop pin 37 is inserted and locked through a washer 36 at the protruding end protruding from 33.

Further, the interlocking rod 31 is formed in a substantially mountain shape, and the bearing body 32 is fixed to the lower portion of the horizontal portion 38 at the top thereof, and the handle 39 is integrally projected on the upper portion of the horizontal portion 38. There is. Also, the connecting pieces at the lower left and right ends of this interlocking rod 31
The front ends of the left and right lock arms 14 are rotatably mounted on the shaft 40 via a support shaft 41.

Next, the connecting rod 42 and the left and right supporting plates on the connecting rod 42 are provided between the rear upper portions of the left and right connecting plates 3 of the connecting frame 2.
A hollow cylindrical connecting body 44 is rotatably supported via 43, and one universal joint 46 of a power transmission shaft 45, which is expandable and contractible only in the axial direction, is spline-fitted in the front side portion of the connecting body 44. The power transmission shaft 45 is connected to the power transmission shaft 45, and the other universal joint 47 of the power transmission shaft 45 is connected to a power extraction shaft of a tractor described later.

Further, 48 is an agricultural work machine. In this agricultural work machine 48, a chain case 50 and a bracket (not shown) are attached to opposite ends of a main frame 49 extending in the left-right direction, and the chain case 50 and the bracket are attached. A rotary working body 51 is rotatably provided between the lower ends of the rotary working body 51, and a cover body 52 covering the upper part of the rotary working body 51 is fixed between the chain case 50 and the bracket. Leveled ground 53
Is rotatably provided in the vertical direction. Also, the main frame 49
Mission case 54 with a built-in mission 53 in the middle of
Is provided, the input shaft 55 of the mission 53 is rotatably projected forward, and the input shaft 55 is connected to the connecting body 44.
The rear side portion is spline-fitted from the axial direction to be connected. In addition, a pair of masts arranged side by side at a predetermined distance from the upper part of the mission case 56.
56 is projected, and an engagement pin 57 which is engageably supported in the engagement recess 26 so as to be engageable and disengageable is horizontally provided between the tip ends of the pair of masts 56. Further, lower arms 58 project forward from both sides of the main frame 49, and lower pins 59, which are releasably engaged and supported in the left and right engaging recesses 4, are provided at the front ends of the left and right lower arms 58. Is projected horizontally.

Further, 60 is a tractor, and lower links 62 are rotatably pivoted in the vertical direction on both left and right sides of the rear part of the tractor body 61, and a lift rod 63 pivotally mounted in the middle of the left and right lower links 62 is the tractor body. A lift mechanism 64 of 61 rotatably pivotally mounts, and a top link 65 that is adjustable in expansion and contraction is vertically rotatably pivotally mounted on the upper rear end of the tractor body 61. A power take-off shaft (PTO shaft) 66 composed of a spline shaft is rotatably projected at the lower end of the end.

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

The tips of the left and right lower links 62 of the tractor 60 are rotatably connected to the left and right lower pins 5 of the connecting frame 2, and the tips of the top links 65 of the tractor 60 are connected to the connecting plate 24 of the connecting frame 2 at selected positions. Mounting hole 25
Is rotatably connected via a connecting pin. As a result, the quick coupler 1 is connected and suspended to the three-point suspension mechanism of the tractor 60.

A power transmission shaft in which the power take-off shaft 66 of the tractor 60 is connected to the quick coupler 1 and one universal joint 46 is connected.
The other universal joint 47 of 45 is connected by spline fitting.

Next, when the lift mechanism 64 of the tractor 60 is actuated and the three-point link mechanism is rotated upward, the quick coupler 1 is rotated upward by an arc motion and the engaging recess 26 in the upper portion of the quick coupler 1 is first rotated. The engaging pin 57 of 48 is engaged with and supported by the engaging pin 57, and the quick coupler 1 is continuously rotated upward, whereby the engaging concave portion 26 causes the agricultural work machine 48 to move upward via the engaging pin 57. The agricultural working machine 48 is moved forward on the side of the tractor 60 with the engagement pin 57 locked in the engagement recess 26 as a center, and the engagement recesses 4 in the left and right connecting plates 3 of the quick coupler 1 are moved. Farm work machine in
The left and right lower pins 59 of 48 are automatically engaged and locked.

That is, the left and right lower pins 59 enter the engaging recesses 4 of the left and right connecting plates 3, and the left and right lower pins 59 push the passive projections 9 of the left and right rotary locking plates 7 toward the front part on the tractor 60 side. When it is moved, the left and right rotation locking plates 7
2 is rotated in the counterclockwise direction against the spring 18 and the left and right lower pins 59 cause the free rods 21 of the left and right springs 18 to be compressed and rotated. The hooks 10 of the plate 7 are engaged with the rear parts of the left and right lower pins 59 that have deeply entered the engaging recesses 4. As a result, the left and right lower pins 59 are rotatably held in the front-rear direction by the engaging recesses 4 of the connecting plate 3 and the engaging recesses 8 of the left and right rotary engaging plates 7 facing the engaging recesses 4, and the spring 18 is also provided.
The folded-back portion 23 is pressed against the locking pin 17. Further, as the left and right rotary locking plates 7 rotate counterclockwise, the engaging protrusions 11 of the left and right rotary locking plates 7 disengage from the locking step 16 at the rear of the left and right lock arms 14, The hook 10 engages with the lower pin 59, and the left and right lock arms 14 are rotated counterclockwise in FIG. 2 about the support shaft 13 by the restoring force of the spring 18, and the locking protrusions of the left and right lock arms 14 are rotated. 15 is engaged in the engagement step portion 12 of the rotation locking plate 7. As a result, the left and right rotary locking plates 7 are automatically locked by the left and right lock arms 14. Therefore, the left and right lower pins 59 are automatically engaged in the engagement recesses 4 of the left and right connecting plates 3, and the left and right lower pins 59 are automatically moved by the left and right rotary locking plates 7 and the left and right lock arms 14. Locked.

Also, when the left and right lower pins 59 of the quick coupler 1 are automatically engaged and locked, the quick coupler 1 is almost at the same time.
The input shaft 55 of the agricultural work machine 48 is automatically spline-fitted into the rear side portion of the connecting body 44 suspended from the connecting frame 2.

In this way, the four-point connecting portion on the agricultural machine 48 side is automatically connected to the four-point connecting portion on the quick coupler 1 side.

Then, as the tractor 60 advances, the agricultural work machine 48 is towed through the quick coupler 1, and the power from the power takeoff shaft 66 of the tractor 60 is transmitted to the mission 53 via the power transmission shaft 45 and the input shaft 55. The rotary work body 51 is rotated by the mission 53 via the output shaft in the main frame 49 and the interlocking medium in the chain case 50, and the rotary work body 51 performs soil work.

Next, when unlocking the left and right lower pins 59,
As shown in FIG. 1 and FIG. 5, when the handle 39 is lifted up, the left and right lock arms 14 resist the spring 18 via the interlocking rod 31 interlocked with the handle 39 to move the handle 39 to the center around the support shaft 13. Fig. 5 Rotated clockwise, the left and right lock arms 14
The locking projection 15 on the front part of the
When the left and right lock arms 14 are unlocked, the left and right rotary locking plates 7 are unlocked, and the left and right locking pins 17 are engaged in the bent portions 22 of the left and right springs 18, and The lock arm 14 is locked.

Then, in this state, by advancing the tractor 60, the left and right lower pins 59 of the agricultural work machine 48 are separated from the engaging recesses 4 in the left and right connecting plates 3 of the quick coupler 1, but at this time, the left and right connecting plates When 3 is advanced, the left and right lower pins 59 are separated from the inside of the engaging recessed portion 4, and the left and right lower pins 59 push the hooks of the left and right turning locking plates 7 to move the left and right turning members. Stop plate 7 is spindle 6
The hook 10 is pivoted downward about the center of the hook 10 to disengage from the left and right lower pins 59, and the left and right lower pins 59 are unlocked. Further, when the left and right lower pins 59 are disengaged from the left and right engaging recesses 4, the weight of the handle 39 and the interlocking rod 31 and the spring.
Due to the restoring force of 18, the left and right locking pins 17 are bent at the left and right 22
The left and right lock arms 14 are rotated counterclockwise in FIG.
The locking step portion 16 at the rear of 14 is locked from above by the engaging projections 11 of the left and right rotary locking plates 7 which are rotated clockwise in FIG. Passive protrusions 9 connect left and right connecting plates 3
Is locked in a state of protruding into the engaging recess 4 of
The free rods 21 of the left and right springs 18 are returned so as to interrupt the middle of the left and right engaging recesses 4. Therefore, the left and right lower pins 59 are separated from the engaging recesses 4 of the left and right connecting plates 3, and the left and right rotation locking plates 7, the left and right lock arms 14, and the springs 18 are returned to the state shown in FIG. Prepare for the next connection of the lower pin 59.

Further, as described above, the left and right lock arms 14 are vertically rotated about the support shaft 13, and the handle 39 is vertically rotated via the interlocking rod 31, but at this time, the interlocking rod 31 is pivoted. Since it is suspended by the pair of connecting plates 24 via the freely suspending metal fitting 28, the left and right lock arms 14 can be smoothly locked and unlocked by the left and right lock arms 14. In addition, by using a common washer 35 at the base end portions of the shaft rods 29, 30 before and after the suspension fitting 28, the assembling workability is easy and the pair of connecting plates 24 and the bearing body 32 are The lifting metal fitting 28 is smoothly rotated up and down.

〔The invention's effect〕

According to the invention of claim 1, the engaging recesses for engaging the lower pins are formed at the rear side portions of the left and right connecting plates, and the lower parts of the left and right connecting plates project into the engaging recesses and are pushed by the lower pins. A rotary locking plate having a hook for locking the passive projection and the lower pin is rotatably provided, and the set positions of the left and right rotary locking plates are locked and unlocked on the upper portions of the left and right connecting plates. Since the lock arm is rotatably biased by springs, the left and right lower pins that are pushed into the engaging recesses of the left and right connecting plates by pushing the passive protrusions of the left and right rotating locking plates It can be securely locked by the hooks of the rotary locking plate of, and the left and right rotary locking plates can be securely locked by the left and right lock arms. Therefore, the quick coupler and the agricultural work machine are With one touch It is possible to lock dynamically linked. In addition, since the left and right lock arms are linked to a common handle, the left and right lock arms that lock the rotation of the left and right rotation locking plates by operating this handle are simultaneously rotated and locked. The locks on the plates can be released simultaneously on the left and right, which allows the left and right lower pins to be easily separated from the left and right connecting plates, and therefore the handle can be operated only when the left and right lower pins are unlocked. It is possible to provide a farm work machine connecting device that is easy to handle and easy to handle.

According to the second aspect of the present invention, when the left and right lower pins are connected, the passive protrusions of the left and right rotary locking plates can be reliably projected into the engaging recesses in preparation for pushing by the lower pins. When the lower pin is locked, the left and right rotary locking plates engaged with the lower pin can be reliably locked.

According to the invention of claim 3, the left and right lock arms are always urged toward the left and right rotary locking plates by the left and right springs to reliably hold the relative position of the lock arm and the rotary locking plate. Further, the lock arm in which the rotation locking plate is unlocked by the bent portions of the left and right springs can be held elastically.

[Brief description of drawings]

1 shows an embodiment of the present invention. FIG. 1 is a side view showing a state in which an agricultural work machine is connected to a tractor via an agricultural work machine connecting device, and FIG. 2 is an enlarged side view of the same agricultural work machine connecting device.
FIG. 3 is a rear view of one side of the same, FIG. 4 is a perspective view of left and right lock arm interlocking mechanisms, and FIGS. 5 and 6 are explanatory side views showing an operating state of the agricultural machine coupling device. 1 ... Quick coupler, 2 ... Connection frame, 3 ...
Connection plate, 4 ... Engagement recess, 6,13 ... Support shaft, 7 ... Rotation locking plate, 9 ... Passive protrusion, 10 ... Hook, 11, 12 ... Engagement part, 14 ... Lock arm, 15, 16 …… Locking part, 17 …… Locking pin, 18 …… Spring, 22 …… Bending part, 39 …… Handle.

Claims (3)

[Claims] 1. A farming machine coupling device for coupling a farming machine to a tractor via a quick coupler, wherein the quick couplers are provided on left and right portions of a coupling frame, and a coupling plate having a rear opening engaging recessed portion. The agricultural work machine provided in the lower part of the left and right connecting plates so as to be rotatable in the vertical direction via a support shaft, has a passive protrusion projecting into the engaging recess at the rear side, and is engaged in the engaging recess. And a rotation locking plate having a hook for locking the lower pin, and a rotation locking plate provided on the upper part of the left and right connecting plates so as to be rotatable in the vertical direction via a support shaft, and the rotation locking plate is stepwise engaged with the lower part on the front side. A lock arm having front and rear locking portions for stopping, a spring attached to the support shafts of the left and right lock arms to constantly urge the locking portion of the lock arm toward the rotation locking plate, Linked to the lock arm of Is agricultural machine connected apparatus characterized by comprising a handle at the same time turning operation the left and right lock arm when the lock release of the left and right Roapin. 2. The right and left rotary locking plates are formed with engaging portions at front and rear portions of a front upper portion, with which the front and rear locking portions of the lock arm are engaged when the lower pin is connected and when the lower pin is locked. The agricultural working machine connecting device according to claim 1, wherein 3. The left and right springs attached to the support shaft of the lock arm have one extension part locked to the lock arm,
The other extension portion is extended rearward and upward via a support shaft of the rotary locking plate, and a bent portion for engaging and disengaging the locking pin of the lock arm is formed at an upper end portion thereof. The agricultural machine coupling device according to claim 1.