JPH025802A - Connecting device of agricultural working machine - Google Patents

Abstract

PURPOSE:To make ready to connect any agricultural working machine without especially set in forwardly inclined attitude by extending top link and automatically projecting stopping part in upper part of quick coupler to the side of agricultural working machine. CONSTITUTION:A top link 3 of three-points link mechanism has connecting body 4 at base end part and inner shaft 23 forming hollow receiving part 25 opened to outside at the top end part. Next, outer shaft 26, pierced by the inner shaft 23 freely movable to forward and back in the axial direction and having connecting body 29 at outer end part, is provided. Then, a revolving body 33, pivoted by the outer shaft 26 in freely revolving state and having engaging part 36 freely capable of engaging with or removing from stopping part 43 in link main body 20, is provided. A spring 46 reinforcing the outer shaft 26 to outside is installed in the hollow receiving part 25 of the inner shaft 23.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a 1N working machine coupling device, and relates to a device for coupling a farm working machine to an agricultural tractor in an automatic fishing manner.

(Prior Art) Conventionally, this divine agricultural machine coupling device includes, for example,
A quick coupler is connected to and suspended from the three-point link mechanism of the tractor, that is, the top link and the left and right lower links, while the agricultural machine is installed on a stand and tilted forward and downward at a predetermined angle, and the top of the quick coupler is At the same time, the above-mentioned three-point link mechanism is used to rotate the quick coupler upward to hook up the agricultural machine and pull it toward the tractor, and then Connection method for connecting the lower left and right connecting parts of the agricultural machine to the locking parts at the lower left and right of the coupler (Problem to be solved by the invention) According to the above-mentioned conventional connection system, the agricultural machine can be connected by metand. It takes a lot of trouble to make the patient lean forward, and
Some agricultural machines cannot have a stand attached to them, and therefore cannot be tilted forward.

It is also possible to manually put the agricultural machine in a forward leaning position without using a stand, but converting an extremely heavy agricultural machine to such a position is extremely difficult and troublesome work. .

Therefore, the present invention was made in view of these points,
When connecting agricultural machinery, the upper link of the quick coupler is extended to allow the upper locking part of the quick coupler to automatically protrude toward the agricultural machinery, and after connecting agricultural machinery, the extended top link is automatically extended. It retracts and allows the agricultural implement to be set in a working position, which makes it easy to attach to the quick coupler without using a stand, or without having to place any agricultural implement that cannot use a stand, especially in a forward leaning position. The object of the present invention is to provide an agricultural machine coupling device that can be coupled.

[Structure of the invention]

(Means for Solving the Problems) A farm working machine coupling device of the present invention connects a three-point coupling part of a farm working machine to a three-point link mechanism of a tractor via a quick coupler. I
The 1-twin printer of II structure includes a link body having a connecting body at the base end, an inner shaft at the distal end, and a hollow accommodating portion opened outward in the inner shaft, and the link body having the above-mentioned an outer shaft that is fitted into the inner shaft so as to be able to move forward and backward in the axial direction and has a connecting body at its outer end; The rotating body includes an engaging portion that engages with the rotating body, and a spring that is housed in a hollow housing portion of the inner shaft and urges the outer shaft outward.

(Function) The agricultural machine coupling device of the present invention couples a quick coupler to a three-point link mechanism of a tractor, rotates a rotating body in a top link of the three-point link mechanism, and connects this engaging portion to a link body. When the outer shaft is released from the locking part to release the lock between the link body and the outer shaft, the outer shaft is projected outward in the axial direction along the inner shaft by the restoring force of the spring, and the extended top link engages the quick coupler. The quick coupler is rotated and tilted rearward about the connecting portion with the left and right lower links of the three-point linkage mechanism, and the locking portion at the top of this quick coupler is projected toward the farm '4Jn side.

Next, when the three-point linkage mechanism of the tractor is rotated upward, the quick coupler moves in an upward arc, causing its upper locking portion to first be securely locked to the upper coupling portion of the agricultural implement, and this upper locking While the agricultural machine is lifted up through the upper coupling part by rotating upward, the agricultural machine is pulled forward toward the tractor side around the upper coupling part that is engaged with the engagement part, and the quick coupler The left and right lower joints of the agricultural machine are automatically secured and locked to the left and right lower locking parts of the agricultural machine.

Next, the three-point linkage mechanism of the tractor is rotated downward, and the quick coupler is also rotated downward, but as the quick coupler descends, the outer shaft is pushed against the quick coupler by 1+v against the spring. While compressing this spring, it is contracted inward in the axial direction along the inner shaft, and finally the engaging part of the rotating body is again locked to the locking part of the link body, and therefore, this contracted top link is the working length and the top of the quick coupler is supported.

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

In the figure, reference numeral 1 denotes a tractor, and a connecting frame 2 is fixed to the upper rear end of the tractor 1, and a connecting body 4 at the base end of a top link 3 is attached to the connecting frame 2 through a connecting pin 5 for vertical self-rotation. VJ is freely connected, and connection pieces 6 are provided protruding from both lower sides of the rear end of the one herak 1, and the base ends of the left and right lower links 7 are connected to the left and right connection pieces 6 via connection pins 8 to rotate in the vertical direction. The left and right lower links 7 and the 1
A three-point link mechanism 9 is constituted by the heb link 3. The base end of a lift arm 11 is rotatably mounted on the rear end of the tractor 1 via a lift shaft 10 in the vertical direction, and the base end of the lift arm 11 is rotatably mounted on the rear end of the tractor 1 via a support shaft 12. A lower end portion of a freely pivoted lift rod 13 is rotatably pivoted midway through the lower link 7 via a support @14.

Next, the top link 3 includes a nut rest 18 having a first threaded rod 15, a second threaded rod 16, and a handle 17 which is screwed and connected to these threaded rods 15 and 16 so as to be adjustable in the axial direction. The first threaded rod 15 of the link body 20 has a link body 20 consisting of a turnbuckle 19.
A lock nut 22 having a handle 21 is screwed into the first threaded rod 15 so that the lock nut 22 can move forward and backward, and a connecting body 4 having an insertion hole 4a through which the connecting pin 5 is inserted is integrally connected to the base end of the first threaded rod 15. An inner shaft 23 having a polygonal cross section is integrally connected to the tip of the second threaded rod 16 in the axial direction, and a stopper 24 is integrally provided in the shape of a flange on the outer periphery of the tip of the inner shaft 23. At the same time, a hollow accommodating part 25 in the shape of a hollow cylinder with an outward opening is bored in the center of the inner shaft 23 in the axial direction. Further, an outer shaft 26 having a polygonal cross-section and a hollow shape is fitted into the outer side of the inner shaft 23 so as to be able to move freely in the axial direction, and the stoppers 24 of the inner shaft 23 are disposed above and below the vicinity of the proximal end of the outer shaft 26.
A stopper 27 is fixed to the outer shaft 26, and a connecting body 29 having an insertion hole 28 is fixed to the distal end of the outer shaft 26. A locking portion 30 for the opening surface of the portion 25 is formed.

Further, support shafts 32 are provided to protrude outward from left and right side plate portions 31 at the base end of the outer shaft 26, and left and right side plates 34 of a rotating body 33 are formed on the left and right support shafts 32 to have a U-shaped cross section. The base end portion of the rotating body 33 is rotatably supported in the vertical direction, and a cam 35 inclined toward the base end side is formed at the lower end of the left and right side plates 34 of this rotating body 33. Engagement recesses 36 are formed as engagement portions in the left and right side plates 34 in the vicinity of the lower end and open downward.

Further, a notch recess 38 is formed at the base end of a top plate 37 that connects the upper ends of the left and right side plates 34 of the rotating body 33, and a notch recess 38 is formed at one side of the tip of the top plate 37 in the axial direction. A handle 39 extending from above is fixed, and a support rod 40 projects outward in the left-right direction from the M% portion of the handle 39, and a support rod projects outward in the left-right direction from the middle lower part of the outer shaft 26. A coil spring 42 is stretched between the rotating body 33 and the coil spring 41.
are biased to rotate downward about left and right support shafts 32.

Further, a locking rod 43 serving as a locking portion is protruded from the base end of the inner shaft 23 in a direction orthogonal to the inner shaft 23, and the left and right projections of the rotating body 33 correspond to the left and right protruding portions of the locking rod 43. The engagement recess 36 is removably engaged with the rotation J of the rotating body 33, and the outer shaft 26 is inserted from one end of the engagement rod 43.
A guide rod 45 in the shape of a lug is fixed integrally with the guide rod 45, which extends obliquely from one side to the upper part and has a guide 44 protruding from the upper part in a direction perpendicular to the outer shaft 26, and is rotated upward by the guide 44. The rotating body 33 is guided to rotate downward. Furthermore, a roll spring 46 is provided in the hollow housing portion 25 of the inner shaft 23.
is housed, and the inner end of this coil spring 46 is engaged with a locking wall 47 in the hollow housing part 25,
The outer end of this coil spring 46 is locked to the locking portion 30 of the outer shaft 26. By this coil spring 46, the outer shirts 1 to 26 are
1 so as to always protrude outward from the inner shaft 23.
lI=t 4313.

Reference numeral 48 denotes a quick coupler, and this quick coupler 48 has a connecting frame 49 formed by bending a vibrator material into a substantially mountain shape. The left and right connecting plates 50 are fixed to each other and extend in the front-rear direction, and four engagement parts 51 that open rearward are formed at 11% of the left and right connecting plates 50. lower pin 52
protrudes outward horizontally. Further, a lock arm 54 is rotatably attached to a pin 53 protruding from the upper front end of the left and right connecting plates 50.
A locking protrusion 5 protruding into the engagement recess 51 at the rear end of 4.
A downwardly inclined guide surface 56 is formed on the outer edge of the locking protrusion 55, and the left and right lock arms 5
A handle 57 is fixed to the front pane of 4. Further, a support shaft 58 is protruded from the upper part of the left and right connecting plates 50, and one end of a spring 59, such as a helical spring, is wound around the support shaft 58 and is locked to the bottle 53. The ring is locked to the rear end of the lock arm 54, and each lock arm 54 is urged to rotate around the pin 53 by the spring 59, so that the locking protrusion 55 is always kept in the engagement recess 51. It is becoming more prominent. In addition, 60 is the lock arm 54 from s1 to stub.
It is. Furthermore, a pair of connecting plates 61 are fixed to the tops of the four connecting frames facing each other at a predetermined interval, and mounting holes 62 are formed facing each other at the front and rear of the upper portions of the pair of connecting plates 61. ing. Further, a hook 63 as a locking portion is fixed to the lower end of the pair of connection plates 61 and the top of the connection frame 49.
A locking recess 64 is formed approximately at the upper middle portion, and a guide surface 65 is formed at the rear upper edge of the locking recess 64 so as to be inclined rearward and upward. Furthermore, support arms 66 are fixed to the inner portions of both lower sides of the connection frame 49;
The left and right bolts 6 are connected between the tips of the left and right support arms 66.
A connecting body 68 is supported so as to be able to swing vertically and horizontally through a hollow cylindrical sliding WU 70 in a hollow cylindrical support tube 69 having the bolts 67 on the left and right sides.
is fitted to be slidable in the axial direction through the guide and the guide groove, and the hollow spline shaft cylinder of one universal joint 72 of the power transmission @ 71 is inserted into this sliding cylinder 70 and rotated back and forth via a bearing. The guide port of a spline hole 73, which is movably supported by a plurality of splines formed in the axial direction of the inner wall of the spline shaft cylinder, is opened at the rear end, and the support cylinder 69 and the sliding cylinder 70 are A coil spring is interposed between them. Thus, the one universal joint 72 is fixed to the outer end of the outer cylinder 74, and the inner cylinder 7 can move forward and backward in the outer cylinder 74 only in the axial direction.
5 is inserted, and the other universal joint 76 is connected to the outer end of this inner cylinder 75. The one universal joint 72, the outer cylinder 74, and the inner cylinder 75
The power transmission shaft 71 is constituted by the other universal joins 1 to 76.

Further, reference numeral 77 denotes an agricultural machine, and this agricultural machine 77 has a chain case 79 and a bracket (not shown) attached to opposite ends of a main frame 78 extending in the left-right direction, and the chain case 79 and the bracket A rotary work body 80 is rotatably provided between the lower G BIS, a cover unit 81 covering the upper part of the rotary work body 80 is fixed between the chain case 79 and the bracket, and the rear end of this cover unit 81 is fixed between the chain case 79 and the bracket. A ground leveling body 82 is provided in the section so as to be rotatable in the vertical direction. A mission case 84 containing a transmission 83 is provided in the middle of the main frame 78, and an input @85 consisting of a spline shaft of the mission 83 is rotatably protruded forward. The connecting body 68 is spline-fitted from the guide port into the female brine hole 73 of the spline shaft cylinder from the axial direction. Further, a mast 86 projects forward from the top of the mission case 84, and an upper engagement pin 87 serving as a connecting portion that releasably engages the hook 63 is horizontally suspended between the tip ends of the mast 86. . Further, lower arms 88 are projected forward from both sides of the main frame 78, and lower engagement bins serving as connecting portions are removably engaged with the tips of the left and right lower arms 88 in the left and right engagement recesses 51. 89 is horizontally projected outward.

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

The left and right lower bins 52 of the connecting frame 49 are rotatably connected to the tips of the left and right lower links 7 of the tractor 1, and the connecting body 2 at the tip of the top link 3 of the tractor 1
9 is rotatably connected to the mounting hole 62 at a selected position in the connection plate 61 of the connection frame 49 via a connection pin 90. Further, a spline shaft 92 at the other universal joint 76 of the power transmission shaft 71 is spline-fitted to the power output shaft 91 of the tractor 1 . This results in
A quick coupler 48 is connected and supported by a three-point link mechanism of the tractor 1, and a power transmission shaft 71 is connected between a power take-off shaft 91 of the tractor 1 and the quick coupler 48.

Next, the rotating body 33 in the top link 3 of the three-point link mechanism 9 is rotated clockwise in FIG. When removed to unlock the inner shaft 23 and outer shaft 26 of the link body 20, the outer shaft 26 is attached to the coil spring 46.
The restoring force pushes the inner shaft 23 outward in the axial direction, and as the top link 3 extends, the power transmission shaft 71 is extended as the outer cylinder 74 is pulled out from the inner cylinder 75. Then, the extended top link 3 causes the quick coupler 48 to rotate and tilt backward in the clockwise direction in FIG. 1 about the lower pins 52 of the left and right lower links 7.
The hook 63 on the upper part of 8 is projected toward the agricultural machine 77 side.

Further, as described above, when the outer shaft 26 is projected outward, the rotating body 33 pulled up on the outer shaft 26 engages with the guide 44 of the guide rod 45 and is prevented from moving outward. At the same time, the rotating body 33 is rotated downwardly in the counterclockwise direction in FIG. It is resiliently supported by a spring 42.

Next, the tractor 1 is moved backward toward the agricultural machine 77 placed at the rear of the tractor 1, and the hook 63 at the top of the quick coupler 48 connected and supported by the three-point link mechanism 9 is attached to the top of the mast 86 for the agricultural work 1177. When facing the engagement bin 87, the tractor 1 stops moving backward.

When the rift 1-arm 11 of the tractor 1 is rotated upward, the quick coupler 48 is connected via the three-point linkage mechanism 9.
is rotated upward in an arcuate motion, and the guide surface 65 of the hook 63 on the top of the quick coupler 48 first engages the top engagement pin 87 on the top of the agricultural work 15377, and the top engagement pin 87 is engaged and locked in the locking recess 64 of the hook 63 from the guide surface 56, and the agricultural machine 77 is hooked upward through the upper engagement bin 87 by the upward rotation of the hook 63. Upper engagement bin 8 locked to this hook 63
This agricultural work m77 is drawn to the front of the tractor 1 side with 7 as the center, and the left and right connecting plates 5 of the quick coupler 48
The left and right lower engagement pins 89 of the agricultural working machine 77 are automatically engaged and locked in the engagement recess 51 at 0, and one of the universal joints 72 suspended from the connection frame 49 of the quick coupler 48. The input shaft 85 of the agricultural work Ia 77 is inserted into the spline hole 73 of the spline shaft cylinder of the connecting body 68.
are automatically spline-fitted from the guide hole.

When the left and right lower engagement pins 89 are engaged and locked in the engagement recesses 51 of the left and right connecting plates 50, the left and right lower engaging pins 89 are engaged with the guide surfaces 56 of the locking protrusions 55 of the lock arms 54 of the left and right connecting plates 51. The lower engaging pins 89 of the left and right lower stop pins 89 push the locking protrusion 55, so that the lock arm 54 is moved around the pin 58 by the spring 5.
9 in the counterclockwise direction in FIG. It is rotated back to the center in the clockwise direction in Figure 1,
The locking protrusion 55 engages with the rear part (5) of the lower engagement pin 89 so as to close the engagement recess 51. Also, the input shaft 85 is spline-fitted into the connecting body 68 of the one universal joint 72. In this case, if the axes of the spline hole 73 of the spline shaft cylinder of the connecting body 68 and the input shaft 85 do not match, the tip of the input shaft 85 will be inserted into the guide port of the connecting body 68, and the connecting body The body 68 swings vertically and horizontally and is automatically aligned with each other, so that the input shaft 85 is automatically spline-fitted into the spline hole 73 of the spline shaft cylinder.

In this way, the four-point connecting portion on the agricultural machine 77 side is automatically connected to the four-point connecting portion on the quick coupler 48 side.

Next, the three-point link of the 1heractor 1 rotates 1M9 downward and the quick coupler 48 is rotated downward, but as the quick coupler 48 descends, the outer shaft 26 is pushed by the quick coupler 48. While compressing the coil spring 46 against the coil spring 46, move inward along the inner shaft 23 in the 1M direction P! The ribs are contracted.

Then, the left and right cams 35 of the rotary body 33 of the outer shaft 26 abut against the locking rod 43, and the left and right cams 35 resist the coil spring 42 and press the locking rod 4.
3 and the rotating body 33 rotates around the support shaft 32.
The left and right cams 35 are rotated clockwise in the figure, and the left and right cams 35 are connected to the locking rod 4.
3 and the left and right engaging recesses 36 reach the position of the locking rod 43, the rotating body 33 is rotated counterclockwise in FIG. 2 by the restoring force of the coil spring 43, and the locking rod is 4
3, the left and right engaging recesses 36 are automatically fitted and locked.

Therefore, the quick coupler 48 is rotated counterclockwise in FIG. This supports the upper part of the quick coupler 48.

As the tractor 1 advances, the agricultural machine 77 is towed and advanced via the quick coupler 48, and the ΩJ force from the assistance extraction shaft 91 of the tractor 1 is transferred to the mission 83 via the power transmission shaft 71 and the input shaft 85. A rotary work body 80, which is interlocked with the mission 83 via the output shaft in the main frame 78 and an interlocking medium in the chain case 79, is rotated by the rotary work body 80. Top work is done.

〔Effect of the invention〕

According to the present invention, the outer shaft is fitted into the inner shaft of the link body via a spring so as to be freely retractable and the rotary body that locks the retreated position of the outer shaft is rotatably provided to form a telescopic top link. By configuring this, when connecting the agricultural machine, the top link can be extended and the upper locking part of the quick coupler can automatically protrude towards the agricultural machine, and after connecting the agricultural machine, the extended top link can be can be automatically retracted to ensure that the agricultural machine is in the working position.
Therefore, any agricultural working machine that cannot use a stand can be easily connected to the quick coupler without using a stand to support the agricultural working machine, and without having to particularly install it in a forward leaning position.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention. Figure 1 is a side view of a tractor connected to a working machine, Figure 2 is an enlarged side view of the top link, and Figure 3 is a partially cutaway view of the same. Plan view,
FIG. 4 is a sectional view taken along line a-a in FIG. 2. DESCRIPTION OF SYMBOLS 1... Tractor, 3... 1~lap link, 9... Three-point link mechanism, 4.29... Connecting body, 20... Link body, 23... Inner shaft, 25... Hollow storage part, 2
6... Outer shaft, 33... Rotating body, 36... Engaging portion, 43... Locking portion, 46... Spring, 48...
Quick coupler, 77...IUf'lE industry, 87,
89...Three-point connection part.

Claims (1)

[Claims] (1) In an agricultural machine coupling device that connects a three-point coupling part of an agricultural machine to a three-point linkage mechanism of a tractor via a quick coupler, the top link of the three-point linkage mechanism has a coupling body at its base end, and a link body having an inner shaft at its tip and forming a hollow housing portion opening outward in the inner shaft; an outer shaft having a connecting body; a rotating body rotatably supported by the outer shaft and having an engaging part that removably engages with a locking part of the link body; and a hollow part of the inner shaft. An agricultural machine coupling device comprising: a spring accommodated in a housing portion and urging the outer shaft outward.