JP7231337B2 - Agricultural machinery connector - Google Patents

Description

TECHNICAL FIELD The present invention relates to a connector for connecting an agricultural implement and a traveling vehicle.

As described in Patent Document 1 below, a structure for connecting a towed agricultural implement to a traveling vehicle is such that a coupling provided on the agricultural implement is coupled to a coupling hitch of the traveling vehicle, and a A structure is known that connects a universal joint shaft so as to span an output portion of a traveling vehicle and an input portion of an agricultural implement.

The above-described connection structure enables the agricultural working machine to be towed by the traveling vehicle, and allows the power of the traveling vehicle to be transmitted as the power of the agricultural working machine.

Japanese Patent Application Laid-Open No. 2007-209211

In the connection structure described above, the connection tool and the universal joint shaft are bent in the vertical direction to follow the vertical movement of the connected traveling vehicle and agricultural implement traveling on an uneven surface. The bending absorbs the force acting on the connector and the universal joint shaft due to the vertical movement of the traveling vehicle and the agricultural implement, thereby preventing breakage of the connector and the universal joint shaft.

However, the size of the unevenness in and around the field where agricultural work is performed varies. When the connector and the universal joint shaft are greatly bent, the connector, the universal joint shaft, and the output shaft come into contact with each other.

Due to the problems described above, there is currently a demand for the development of a connector that can prevent contact between the connector and the universal joint shaft and the output shaft regardless of the size of the farm field or the unevenness around the field.

The means adopted by the present invention to solve the above-mentioned problems is a coupling device 1 for connecting a traveling vehicle and an agricultural working machine and for towing the agricultural working machine with the traveling vehicle, The connector 1 includes a first connecting portion 10 on the side of the traveling vehicle and a second connecting portion 20 on the side of the agricultural implement. A bifurcated expanding connecting rod 10B that is expanded along the axial direction of the axle SH of the traveling vehicle and has a space S secured inside thereof, and the connecting tool 1 is provided with the expanding connecting rod 10B . In the space S , a universal joint shaft AB1 connected so as to extend over the output portion B1 of the traveling vehicle and the input portion A1 of the agricultural implement is positioned, and the left rod portion 10BL and the right rod portion 10BR of the expansion connecting rod 10B are located. 2. The connector for agricultural machinery is characterized in that it is arranged at a position not overlapping with the universal joint shaft AB1 in the vertical direction.

It is preferable that the first connecting portion and the second connecting portion are rotatably supported via a support shaft having an axis perpendicular to the axial direction of the axle.

The expansion connecting rod has a right rod portion and a left rod portion, and the right rod portion and the left rod portion are formed so as to be symmetrical about a center line parallel to the traveling direction of the vehicle. It is preferable that

FIG. 2 is a plan view of a traveling vehicle and an agricultural working machine that are connected using the connecting device for the agricultural working machine according to the first embodiment of the present invention; 2 is a side view of FIG. 1; FIG. 1 is a plan view of a connector for an agricultural work machine according to a first embodiment of the present invention; FIG. 4 is a side view of FIG. 3; FIG.

A connector 1 for an agricultural work machine A according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG.

The agricultural implement A exemplified below is a tow-type square baler, which is connected to a traveling vehicle B via a connector 1 to be towed, and the power of the traveling vehicle B is supplied via a PTO (Power Take Off). It uses the transmitted power to pick up crops in the field, chop them, and shape them into square bales.

1 and 2, the axial direction of the axle SH of the traveling vehicle B is referred to as left and right, the traveling vehicle B side is referred to as the front, the agricultural implement A side is referred to as the rear, and the direction perpendicular to the front-rear direction is referred to as the up and down direction. .

The farm work machine A is not limited to the square baler illustrated, but is connected to and towed by the traveling vehicle B, and the power of the traveling vehicle B is transmitted by a power transmission means such as a PTO, and operated by the transmitted power. including.

As shown in FIGS. 1 to 4, the connector 1 connects the agricultural implement A and the traveling vehicle B in series along the traveling direction (the direction indicated by the arrow in FIG. 1). It has a first connecting portion 10 that is pivotally supported, and a second connecting portion 20 that is pivotally supported by the agricultural implement A. As shown in FIG.

As shown in FIGS. 1 and 2, the connector 1 is arranged directly below a universal joint shaft AB1 connected to extend over the output portion B1 of the traveling vehicle B and the input portion A1 of the agricultural work machine A. By pivotally supporting the connecting portion 10 to the traveling vehicle B and pivoting the second connecting portion 20 to the agricultural working machine A, the agricultural working machine A and the traveling vehicle B are connected.

The first connecting portion 10 and the second connecting portion 20 are rotatably connected to each other in the horizontal direction via a support shaft 30 having a vertical axis.

The first connecting portion 10 is vertically rotatably supported with respect to the traveling vehicle B via a connecting shaft 10A having an axis in the lateral direction, and the second connecting portion 20 is vertically rotatable with respect to the agricultural implement A. is rotatably supported in the left-right direction via a connecting shaft 20A having an axis of .

As shown in FIGS. 1 and 3, the first connecting portion 10 includes a semicircular expanding connecting rod 10B that is expanded forward in a plan view. A connecting shaft 10A is pivotally supported on each of the front end portions, and a pivot plate 31 for pivotally supporting a supporting shaft 30 is provided behind the expansion connecting rod 10B.

The expansion connecting rod 10B is formed so as to be bilaterally symmetrical between the left and right rod portions 10BL and 10BR with the center line CL extending in the front-rear direction as an axis of symmetry. A space S is secured between 10BR.

A shaft support hole 31A for supporting the support shaft 30 is formed in the shaft support plate 31, and the shaft support hole 31A is arranged on the center line CL.

The connecting shaft 10A has a left-right axis at the front end of a connecting body 10C which is rotatably supported around a left-right axis at the ends of the left and right rods 10BL and 10BR. It is fixed so as to protrude in the direction.

2 and 4, the second connection part 20 includes a support rod 20B connected to the first connection part 10 and a support rod fixed to the front end of the support rod 20B to support the support shaft 30. It has a plate 32 and a connecting shaft 20A provided at the rear end.

By inserting the support shaft 30 into the shaft support hole 31A, the second connection portion 20 is connected to the first connection portion 10 so as to be rotatable in the left-right direction about the support shaft 30 as the center of rotation.

Contact surface portions 31B and 31C that come into contact with each other when the first connecting portion 10 and the second connecting portion 20 rotate left and right are provided on the left and right of the shaft support plate 31 and the left and right of the support plate 32, The limit of left-right rotation of the first connecting portion 10A and the second connecting portion 20 is defined at the position where the contact surface portions 31B and 31C are in contact with each other.

As shown in FIGS. 1 and 2, the connecting device 1 rotatably supports the connecting shaft 10A with respect to the rear portion of the traveling vehicle B, and the connecting shaft 20A with respect to the front portion of the agricultural implement A. By rotatably supporting the agricultural implement A and the traveling vehicle B, the agricultural implement A and the traveling vehicle B can be connected.

In the connecting device 1, the connecting member 10C rotates with respect to the expanding connecting rod 10B and the connecting shaft 10A rotates with respect to the traveling vehicle B, thereby rotating the expanding connecting rod 10B and the connecting member 10C. It is designed to bend in the vertical direction.

That is, when the agricultural work machine A and the traveling vehicle B, which are connected to each other, get over the unevenness in the upper and lower sides while traveling, the connecting tool 1 is bent up and down, so that the agricultural working machine A and the traveling vehicle B travel along the unevenness. Therefore, it is possible to reduce the impact caused by vertical movement during running.

In addition, as shown in FIG. 1, the connecting device 1 is configured so that the first connecting portion 10 and the second connecting portion 20 move left and right with the support shaft 30 as the center of rotation in accordance with the direction change/direction change of the traveling vehicle B. It rotates in the direction and bends at the support shaft 30, and rotates in the left-right direction about the rotation center of the connecting shaft 20A with respect to the agricultural work machine A, so that the agricultural work machine A can smoothly change the direction of the traveling vehicle B. can be followed.

In the connected state of the connector 1, as shown in FIG. 1, the expansion connecting rod 10B is opened in the left-right direction in plan view, the universal joint axis AB1 is positioned in the space S, and the left and right rod portions 10BL and 10BR are positioned. are positioned so as not to overlap in the vertical direction with respect to the universal joint axis AB1.

That is, in the connecting state of the connecting device 1, the universal joint axis AB1 is positioned above the space S of the expansion connecting rod 10B, so even if the connecting device 1 is greatly bent due to large unevenness, the universal joint of the connecting device 1 can be It is possible to prevent contact with the shaft AB1 and the output portion B1.

Therefore, the connector 1 can prevent contact with the universal joint shaft AB1 and the output portion B1 regardless of the size of the unevenness in the field where the farm work is performed or the circumference of the field. It is possible to prevent troubles such as failure and breakage of the portion B1.

The planar shape of the expanding connecting rod 10B of the connecting tool 1 is not limited to the illustrated shape, and may be a bifurcated shape expanding in the left-right direction (not shown).

Further, the planar shape of the expanding connecting rod 10B of the connecting device 1 is not limited to a planar shape symmetrical about the center line CL parallel to the running direction of the traveling vehicle B as illustrated (not shown). figure).

Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments, and changes in design, etc., without departing from the gist of the present invention. is included in the present invention.

In addition, each of the above-described embodiments can be combined by diverting each other's techniques unless there is a particular contradiction or problem in the purpose, configuration, or the like.

A: Agricultural machine B: Traveling vehicle
AB1: Universal joint shaft
1: Connecting tool 10: First connecting part 20: Second connecting part 30: Support shaft 10A: Connection shaft 10B: Expansion connection rod
10BL: left handle
10BR: right rod
10C: connecting body 20A: connecting shaft SH: axle CL: center line (symmetry axis)
S: space

Claims (3)

A connecting tool for an agricultural working machine for connecting a traveling vehicle and an agricultural working machine and for towing the agricultural working machine with the traveling vehicle,
The connecting device includes a first connecting portion on the traveling vehicle side and a second connecting portion on the agricultural implement side,
the first connecting portion is a bifurcated expanding connecting rod that is expanded along the axial direction of the axle of the traveling vehicle with the traveling vehicle side as an open side and has a space secured inside ;
with
In the connecting device, a universal joint shaft connected so as to extend over the output portion of the traveling vehicle and the input portion of the agricultural implement is positioned in the space of the expanding connecting rod, and the left rod portion of the expanding connecting rod is positioned. A connector for an agricultural implement, wherein a right rod portion is arranged at a position not overlapping the universal joint shaft in the vertical direction.
The first connecting portion and the second connecting portion are rotatably supported via a support shaft having an axis perpendicular to an axial direction of the axle in a vertical direction. The connector for agricultural machinery according to claim 1. The expansion connecting rod has a right rod portion and a left rod portion, and the right rod portion and the left rod portion are formed so as to be symmetrical about a center line parallel to the traveling direction of the vehicle. 3. The connector for agricultural machinery according to claim 1 or 2, wherein:

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