KR20170107696A - Linkage Apparatus for Agricultural Vehicle - Google Patents

Abstract

The present invention comprises: a shifting connection unit operated by movement of a shifting pedal unit to control a continuously variable hydraulic transmission installed in an agricultural work vehicle; a pump connection unit coupled to a pump lever to control an injection pump installed in the agricultural work vehicle; and a linkage unit connecting the shifting connection unit and the pump connection unit to be moved with the pump lever together in accordance with movement of the shifting pedal unit. The present invention prevents a state where rpm of an engine is unnecessarily increased.

Description

Linkage Apparatus for Agricultural Vehicle {

The present invention relates to an interlocking device for an agricultural work vehicle for interlocking a transmission and an injection pump of an agricultural working vehicle.

Agricultural working vehicles are used to cultivate the crops needed for human life by using land. For example, Combine, Tractor and so on correspond to agricultural working vehicles. The combine is to perform the task of taking the crops such as rice, barley, wheat, The tractor performs the work necessary to grow the crop using the traction force.

These agricultural working vehicles include a hydraulic static transmission (HST), and an injection pump.

The hydraulic stepless transmission is for controlling the running speed of the agricultural working vehicle. In order to control the hydraulic stepless transmission, the agricultural work vehicle is equipped with a speed change pedal. The operator can control the hydraulic speed limiter by adjusting the degree of depression of the shift pedal portion, thereby adjusting the running speed of the agricultural work vehicle.

The injection pump is for controlling the revolutions per minute (RPM) of the engine provided in the agricultural working vehicle. In order to control the injection pump, the agricultural working vehicle is provided with a hand lever. The operator adjusts the degree of movement of the hand lever so as to control the injection pump to adjust the revolutions per minute of the engine provided in the agricultural working vehicle.

Here, the agricultural working vehicle according to the prior art is implemented such that the hydraulic CVT and the injection pump are controlled individually. Accordingly, when the operator accelerates the agricultural work vehicle, the worker operates the agricultural work vehicle in such a manner that the revolutions per minute of the engine is increased by operating the hand lever in parallel with the stepping on the speed change pedal portion. On the other hand, when the worker decelerates or stops the agricultural work vehicle, it is general that the hand lever is not operated separately, although it reduces the degree of depression of the shift pedal portion or stepping on the shift pedal portion.

Therefore, even when the vehicle is decelerating or stopping, the conventional agricultural work vehicle is maintained in an increased state as the engine revolutions per minute is accelerated. Thus, the noise problem and the fuel consumption amount unnecessarily increased .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an interlocking device for an agricultural work vehicle that can prevent unnecessary rotation of the engine from being maintained at an increased speed per minute.

In order to solve the above problems, the present invention can include the following configuration.

The interlocking device for an agricultural work vehicle according to the present invention includes a speed change connection portion that operates in accordance with movement of a speed change pedal portion for controlling a hydraulic continuously variable transmission installed in an agricultural work vehicle; A pump connection portion coupled to a pump lever for controlling an injection pump installed in the agricultural working vehicle; And an interlocking portion that connects the transmission connection portion and the pump connection portion such that the pump lever moves together as the transmission pedal portion moves.

According to the present invention, the following effects can be achieved.

The present invention is implemented so as to reduce the revolutions per minute of the engine even if the operator does not operate the hand lever when the running speed for the agricultural working vehicle is decreased so that unnecessary revolutions per minute of the engine are prevented from being maintained in an increased state, Not only can contribute to improving the fuel efficiency of the working vehicle, but also can improve the convenience of the workplace driving the agricultural working vehicle.

1 is a schematic block diagram of an interlocking device for an agricultural working vehicle according to the present invention;
2 is a schematic perspective view showing a state in which the linking device of the agricultural working vehicle according to the present invention is coupled to the hydraulic CVT and the injection pump.
3 is a schematic perspective view of the transmission connection portion in the interlock device of the agricultural working vehicle according to the present invention.
FIGS. 4 to 6 are schematic side views for explaining the operating relationship between the rotary member and the interlocking portion in the interlocking device of the agricultural working vehicle according to the present invention
FIG. 7 is a schematic perspective view showing a state in which the transmission connection portion is coupled to the hydraulic CVT in the interlocking apparatus for an agricultural work vehicle according to the present invention. FIG.
8 to 10 are schematic side views for explaining the operating relationship of the speed change pedal portion, the speed change connection portion, and the interlocking portion in the interlocking device of the agricultural working vehicle according to the present invention
11 is a schematic exploded side view of a cam member and a pressing member in a linking device for an agricultural working vehicle according to the present invention
Fig. 12 is a schematic perspective view of a shift connecting portion provided with a fixing member and an elastic member in a linking device for an agricultural working vehicle according to the present invention; Fig.
13 is a schematic perspective view showing a state in which the pump connecting portion is coupled to the injection pump in the interlocking device of the agricultural working vehicle according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an interlocking apparatus for agricultural work vehicles according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the interlocking device 1 of the agricultural work vehicle according to the present invention is provided in an agricultural work vehicle (not shown) such as a tractor, a combine or the like. The agricultural working vehicle includes a HST (Hydro Static Transmission) 100 (shown in FIG. 1) and an injection pump 200 (shown in FIG. 1). The hydraulic CVT 100 is for controlling the running speed of the agricultural work vehicle. The injection pump 200 is for controlling the revolutions per minute (RPM) of the engine (not shown) provided in the agricultural working vehicle. The agricultural working vehicle includes a speed change pedal portion 110 for controlling the speed change pedal portion 110 and a pump lever 210 for controlling the injection pump 200.

The interlocking device 1 of the agricultural work vehicle according to the present invention is arranged such that the running speed of the agricultural working vehicle using the hydraulic CVT 100 and the number of revolutions per minute of the engine using the injection pump 200 are adjusted do. To this end, the interlocking device 1 of the agricultural work vehicle according to the present invention includes a speed change connection portion 2 that operates as the speed change pedal portion 110 moves, a pump connection portion 3 coupled to the pump lever 210, And an interlocking portion 4 for connecting the speed change connection portion 2 and the pump connection portion 3 with each other.

The transmission connection portion 2 moves the interlocking portion 4 while operating as the speed change pedal portion 110 moves. The linkage portion 4 moves the pump connection portion 3 while moving according to the operation of the speed change connection portion 2. The pump connecting part 3 moves the pump lever 210 while moving as the interlocking part 4 moves.

Accordingly, the interlocking device 1 of the agricultural work vehicle according to the present invention is realized such that the pump lever 210 is interlocked and moved together as the speed change pedal part 110 moves. For example, when the speed change pedal section 110 is moved so as to reduce the running speed for the agricultural working vehicle, the interlocking apparatus 1 of the agricultural working vehicle according to the present invention controls the speed of the pump lever (210).

Therefore, the interlocking device 1 of the agricultural work vehicle according to the present invention can reduce the revolutions per minute of the engine even if the operator does not operate the hand lever when the running speed for the agricultural work vehicle is reduced. Accordingly, the interlocking device 1 of the agricultural work vehicle according to the present invention is unnecessarily implemented to prevent the revolutions per minute of the engine from being maintained in an increased state, thereby unnecessarily maintaining the revolutions per minute of the engine in an increased state It is possible to solve the noise problem and the increase of the fuel consumption. Therefore, the interlocking device 1 of the agricultural working vehicle according to the present invention not only can contribute to improving the fuel consumption for the agricultural working vehicle, but also can improve the convenience for the workplace operating the agricultural working vehicle.

Hereinafter, the speed change connection portion 2, the pump connection portion 3, and the interlocking portion 4 will be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 to 3, the transmission connection portion 2 is for moving the interlocking portion 4 as the transmission pedal portion 110 moves. The transmission connection portion 2 can move the interlocking portion 4 while operating as the speed change pedal portion 110 moves. The shift pedal portion 110 may be moved by an operator aboard the agricultural work vehicle. When the operator accelerates the agricultural working vehicle, the operator can step on and shift the transmission pedal portion 110. When the operator decelerates the agricultural work vehicle, the operator can move the transmission pedal portion 110 by releasing the foot from the speed change pedal portion 110 or reducing the pressing force on the speed change pedal portion 110. The transmission pedal portion 110 may be installed at a position where the operator can step on the driver's seat of the agricultural work vehicle. The transmission connection portion 2 may be coupled to the hydraulic CVT 100. The transmission connection portion 2 may be coupled to a vehicle body (not shown) of the agricultural working vehicle.

Referring to Figs. 1 to 6, the transmission connection portion 2 may include a rotating member 21 (shown in Fig. 3).

The rotary member 21 is for moving the interlocking portion 4 while rotating as the speed change pedal portion 110 moves. The rotary member 21 may be rotatably coupled to the hydraulic CVT 100. The rotary member 21 may be rotatably coupled to the vehicle body. The rotary member 21 can rotate about the rotary shaft 21a (shown in FIG. 4) as the speed change pedal unit 110 moves. The interlocking portion 4 is coupled to the rotary member 21 at a position spaced apart from the rotary shaft 21a. Accordingly, the rotary member 21 can move the interlocking portion 4 while rotating about the rotary shaft 21a as the transmission pedal portion 110 moves.

For example, as shown in FIG. 4, in a state where the interlocking portion 4 is engaged with the rotary member 21 at a position spaced from the rotary shaft 21a, the rotary member 21 Can rotate about the rotary shaft 21a in the first rotation direction (R1 arrow direction) to pull the interlocking portion 4 and move it. In this case, as the operator steps on the speed change pedal portion 110 to increase the running speed with respect to the agricultural working vehicle, the rotating member 21 rotates about the rotation axis 21a in the first rotation direction R1 The arrow direction). The interlocking portion 4 is pulled and moved by the rotary member 21 as the rotary member 21 rotates in the first rotation direction R1 direction so that the number of revolutions per minute The pump lever 210 (shown in FIG. 1) can be moved.

6, the rotary member 21 is rotated in the second rotation direction (R2 arrow direction) opposite to the first rotation direction (R1 arrow direction) about the rotation axis 21a , The interlocking part (4) can be pushed and moved. In this case, as the operator reduces the speed at which the operator steps off the transmission pedal portion 110 or steps on the transmission pedal portion 110 to reduce the running speed for the agricultural working vehicle, Can rotate in the second rotation direction (arrow R2 direction) around the rotation shaft 21a. The interlocking portion 4 is pushed by the rotary member 21 as the rotary member 21 rotates in the second rotation direction R2 direction, The pump lever 210 (shown in Fig. 1) can be moved.

7 to 11, the transmission connection portion 2 may include a cam member 22 and a pressing member 23.

The cam member 22 is adapted to move as the speed change pedal unit 110 moves. The cam member 22 may be coupled to the coupling arm 111 of the transmission pedal portion 110. The cam member 22 may be fixedly coupled to the coupling arm 111 to move together as the coupling arm 111 moves. The connecting arm 111 can move as the forward pedal 112 and the reverse pedal 113 of the transmission pedal portion 110 rotate. The forward pedal 112 is for advancing the agricultural work vehicle. The reverse pedal 113 is for reversing the agricultural working vehicle. The forward pedal 112 and the reverse pedal 113 are connected to each other through gears and can rotate in directions opposite to each other. The connecting arm 111 moves in the first direction (the direction of the arrow FD) and the second direction (the direction of the arrow SD) as the forward pedal 112 and the reverse pedal 113 rotate, Is moved in the first direction (FD arrow direction) and the second direction (SD arrow direction).

For example, as shown in FIG. 9, when the operator steps on the forward pedal 112 and rotates in the first rotational direction (arrow R1 direction) to increase the traveling speed at which the agricultural working vehicle is advanced, 111 move in the first direction (FD arrow direction) while moving the cam member 22 in the first direction (FD arrow direction). In this case, the reverse pedal 113 may be rotated in the second rotation direction (arrow R2 direction) through a gear connected to the forward pedal 112.

For example, as shown in FIG. 10, when the operator steps on the reverse pedal 113 and rotates in the first rotation direction (arrow R1 direction) to increase the traveling speed at which the agricultural working vehicle is moved backward, (SD arrow direction) while moving the cam member 22 in the second direction (SD arrow direction). In this case, the forward pedal 112 may be rotated in the second rotation direction (arrow R2 direction) through a gear connected to the reverse pedal 113. [

The forward pedal 112 is connected to the reverse pedal 113 via the gear at the upper side of the reverse pedal 113. However, when the reverse pedal 113 is positioned above the forward pedal 112 And may be connected to the forward pedal 112 via a gear. In this case, the connection arm 111 may be coupled to the reverse pedal 113.

The cam member 22 may include a cam groove 221 (shown in FIG. 10) and a cam protrusion 222.

The cam groove 221 is for the pressing member 23 to be inserted. The cam groove 221 may be recessed at a predetermined depth from one surface of the cam member 22 facing the pressing member 23. When the pressing member 23 is inserted into the cam groove 221, the rotating member 21 can rotate in the second rotating direction (the direction of the arrow R2).

The cam protrusion 222 is for pressing the pressing member 23. The cam protrusion 222 is formed to protrude from one surface of the cam member 22. The cam protrusion 222 may protrude from one side of the cam member 22 toward the rotary member 21. As the cam member 22 moves in the first direction (FD arrow direction) and the second direction (SD arrow direction) by the connecting arm 111, the cam protrusion 222 is moved in the first direction FD arrow direction) and the second direction (SD arrow direction).

The cam member 22 may include a plurality of the cam protrusions 222. The cam protrusions 222 may be disposed on both sides with respect to the cam groove 221. The cam protrusions 222 may be formed symmetrically with respect to the cam groove 221. Accordingly, when the cam member 22 is moved in the first direction (FD arrow direction) and the second direction (SD arrow direction) by the connecting arm 111, the cam protrusions 222 are moved in the first direction The pressing member 23 can be pressed while moving in one direction (FD arrow direction) and in the second direction (SD arrow direction).

The pressing member 23 is for rotating the rotating member 21. The pressing member 23 may be coupled to the rotating member 21 so as to be positioned below the cam member 22. The pressing member 23 may be coupled to the rotary member 21 at a position spaced apart from the rotary shaft 21a of the rotary member 21. [ Accordingly, the pressing member 23 can rotate the rotary member 21 about the rotary shaft 21a as the pressing member 23 is pressed by the cam protrusion 222. When the cam member 22 moves as the speed change pedal unit 110 moves and the cam protrusion 222 presses the pressing member 23, the rotating member 21 rotates the rotation shaft 21a (Arrow R1 direction) in the first rotation direction. When the cam member 22 moves and the pressing member 23 is inserted into the cam groove 221 as the speed change pedal unit 110 moves, the rotating member 21 rotates about the rotation axis 21a In the second rotation direction (the arrow R2 direction).

8, when the forward pedal 112 and the reverse pedal 113 are both in the neutral position, the cam member 22 is moved in a direction in which the pressing member 23 is in contact with the cam groove 221 It can be positioned at the position where it is inserted. In this case, both the forward pedal 112 and the backward pedal 113 are not stepped on by the operator. The pressing member 23 can be inserted into the cam groove 221 between the cam protrusions 221. [ The pressing member 23 can be inserted into the cam groove 221 as the rotating member 21 rotates in the second rotational direction (arrow R2 direction).

For example, as shown in FIG. 9, when the operator steps on the forward pedal 112 to rotate in the first rotation direction (arrow R1 direction) to increase the traveling speed for advancing the agricultural working vehicle, 222 can move in the first direction (FD arrow direction) to press the pressing member 23 as the connecting arm 111 moves in the first direction (FD arrow direction). As the pressing member 23 is pressed against the cam protrusion 222, the rotary member 21 rotates about the rotary shaft 21a in the first rotation direction (arrow R1 direction) 4) can be pulled and moved. Accordingly, the interlocking portion 4 can move the pump lever 210 (shown in FIG. 1) so as to increase the revolutions per minute for the engine.

For example, as shown in FIG. 10, when the operator steps on the reverse pedal 113 and rotates in the first rotation direction (arrow R1 direction) to increase the traveling speed at which the agricultural working vehicle is reversed, 222 can move in the second direction (SD arrow direction) as the connecting arm 111 moves in the second direction (SD arrow direction) to press the pressing member 23. As the pressing member 23 is pressed against the cam protrusion 222, the rotary member 21 rotates about the rotary shaft 21a in the first rotation direction (arrow R1 direction) 4) can be pulled and moved. Accordingly, the interlocking portion 4 can move the pump lever 210 (shown in FIG. 1) so as to increase the revolutions per minute for the engine.

Referring to FIG. 11, the pressing member 23 may be formed such that the contact surface 221 connected to the cam member 22 has a curved surface. The cam protrusion 222 may be formed such that the cam surface 222a facing the pressing member 23 is curved. Accordingly, the linking device 1 of the agricultural work vehicle according to the present invention is configured such that the cam member 22 moves in the first direction (FD arrow direction) and the second direction (SD arrow direction) 23, the abrasion that occurs in the cam member 22 and the urging member 23 due to friction can be reduced. Therefore, the interlocking device 1 of the agricultural working vehicle according to the present invention not only can reduce the maintenance cost by extending the replacement period for the cam member 22 and the pressing member 23, The operating rate of the vehicle can be improved.

When the cam member 22 includes two cam protrusions 222, the cam surface 222a of the cam protrusion 222 located on the side of the cam groove 221 in the first direction (arrow direction of FD) A curved surface can be formed so as to project further toward the pressing member 23 toward the first direction (FD arrow direction). The cam surface 222a of the cam protrusion 222 located on the side of the cam groove 221 in the second direction (SD arrow direction) projects further toward the pressing member 23 toward the second direction (SD arrow direction) So that a curved surface can be formed. The cam surfaces 222a may be formed symmetrically with respect to the cam groove 221.

The pressing member 23 may be rotatably coupled to the rotary member 21. [ Accordingly, when the cam member 22 moves in the first direction (FD arrow direction) and in the second direction (SD arrow direction), the urging member 23 is urged in a direction Can be rotated. Therefore, the interlocking device 1 of the agricultural working vehicle according to the present invention can further reduce the abrasion that occurs in the cam member 22 and the urging member 23 by friction, The replacement period for the pressing member 23 can be further extended.

The pressing member 23 may be formed in a disc shape as a whole, but is not limited thereto. The pressing member 23 may be pressed by the cam member 22 to rotate the rotating member 21 about the rotating shaft 21a But may be formed in other forms.

7 to 12, the transmission connection portion 2 may include a fixing member 24 (shown in Fig. 12) and an elastic member 25 (shown in Fig. 12).

The fixing member 24 is for supporting the elastic member 25. The fixing member 24 may be fixedly coupled to the hydraulic CVT 100. [ The fixing member 24 may be fixedly coupled to the vehicle body. When the rotary member 21 rotates about the rotary shaft 21a, the fixing member 24 is held in a fixed state without rotating or moving.

The elastic member 25 has an elastic force. The elastic member 25 is coupled to the fixing member 24 and the rotary member 21, respectively. One side of the elastic member 25 may be coupled to the fixing member 24. And the other side of the elastic member 25 may be coupled to the rotary member 21. [ The elastic member 25 may provide an elastic force for rotating the rotary member 21 in the second rotation direction (arrow R2 direction). In this case, the elastic member 25 may be compressed on the basis of one side coupled to the fixing member 24 to rotate the rotary member 21 in the second rotation direction (the direction of the arrow R2). Specifically, it is as follows.

First, when the operator presses the forward pedal 112 or the reverse pedal 113 to rotate in the first rotational direction (R1 direction) to increase the running speed of the agricultural work vehicle, the rotational member 21 Causes the elastic member 25 to be pulled while rotating in the first rotational direction (R1 direction) as the pressing member 23 is pressed by the cam member 22. In this case, the elastic member 25 is stretched and has a restoring force.

Next, when the worker releases his / her foot from the forward pedal 112 and the reverse pedal 113 to rotate or decelerate the agricultural work vehicle in the second rotation direction (R2 direction), the rotation member 21 can rotate in the second rotation direction (arrow R2 direction) as the elastic member 25 is compressed by the restoring force. In this case, the pressing member 23 can be moved to be inserted into the cam groove 221 by the restoring force provided from the elastic member 25. [

The elastic member 25 and the urging member 23 may be coupled to the rotary member 21 at different positions with reference to the rotary shaft 21a of the rotary member 21. [ In this case, the pressing member 23 is coupled to one side of the rotating member 21, and the elastic member 25 can be coupled to the other side of the rotating member 21. The rotary shaft 21a of the rotary member 21 may be positioned between one side of the pressing member 23 and the other side of the elastic member 25. Thus, when the pressing member 23 is pressed by the cam member 22, one side of the rotating member 21 rotates about the rotating shaft 21a in the first rotating direction (R1 direction) And the other side of the rotary member 21 can be pulled by pulling the elastic member 25 while rotating in the first rotation direction (R1 arrow direction) about the rotary shaft 21a. When the pressing member 23 is not pressed by the cam member 22, the other side of the rotating member 21 is pulled as the elastic member 25 is compressed by the restoring force, And one side of the rotating member 21 rotates in the second rotational direction (R1 arrow direction) about the rotational axis 21a while the pressing member 23 rotates in the second rotational direction (R2 arrow direction) Can be inserted into the cam groove 221. The elastic member 25 may be a spring.

Referring to FIGS. 1 and 13, the pump connection part 3 is for moving the pump lever 210 for controlling the injection pump 200. The pump connection part 3 may be coupled to the pump lever 210 coupled to the injection pump 200. The pump connecting part 3 can be pulled and moved as the driven linkage part 4 is pulled by the speed change linkage part 2 and pulled by the linkage part 4 to move the pump lever part 210 . In this case, the injection pump 200 may be controlled to increase the revolutions per minute for the engine. The pump connecting portion 3 can push the pump lever 210 as it moves by being pushed by the linkage portion 3 when the linkage portion 4 is pushed by the speed change connection portion 2. In this case, the injection pump 200 may be controlled to reduce the number of revolutions per minute for the engine.

The pump connecting part 3 may include an elastic mechanism (not shown) for pulling the interlocking part 4. [ In this case, if the interlocking portion 4 is pulled by the speed change connecting portion 2, the elastic mechanism of the pump connecting portion 3 can be pulled. When the transmission connecting portion 2 removes the pulling force of the interlocking portion 4, the resilient mechanism of the pump connecting portion 3 can pull the interlocking portion 4 with a restoring force. The elastic mechanism may be coupled to the pump lever 210. In this case, when the linkage portion 4 is pulled by the transmission linkage portion 2, the elastic mechanism can be pulled as the pump lever 210 moves. When the transmission linkage 2 removes the pulling force of the linkage portion 4, the elastic mechanism pulls the pump lever 210 with a restoring force to move the pump linkage portion 3 and the linkage portion 4 It can be pulled and moved. The elastic mechanism may be a spring.

Referring to FIGS. 1 to 13, the linkage portion 4 is for connecting the speed change connection portion 2 and the pump connection portion 3. The linkage unit 4 may connect the speed change connection unit 2 and the pump connection unit 3 so that the pump lever 210 moves together as the speed change pedal unit 110 moves. Therefore, the interlocking device 1 of the agricultural work vehicle according to the present invention is implemented so that, when the running speed for the agricultural work vehicle is reduced, the number of revolutions per minute of the engine can be reduced even if the operator does not operate the hand lever. Accordingly, the interlocking device 1 of the agricultural work vehicle according to the present invention can be prevented from unnecessarily maintaining the revolutions per minute of the engine in an increased state, thereby contributing to the improvement of the fuel economy of the agricultural work vehicle. As well as the convenience for the worksite in which the agricultural work vehicle is operated.

One side of the interlocking part 4 may be coupled to the speed change connection part 2 and the other side may be coupled to the pump connection part 3. The interlocking portion 4 may be a cable but is not limited thereto and may be a cable other than a cable as long as it can transmit operation force transmitted through the speed change connection portion 2 to the pump connection portion 3 .

The interlocking portion 4 may be coupled to the rotary member 21 of the transmission connection portion 2. Accordingly, the direction of movement of the interlocking portion 4 is changed according to the rotation direction in which the rotation member 21 rotates about the rotation axis 21a, so that the direction in which the pump lever 210 is moved can be changed have. Specifically, it is as follows.

First, when the operator steps on the forward pedal 112 and rotates in the first rotational direction (arrow R1 direction) to increase the traveling speed at which the agricultural working vehicle is advanced, the cam member 22 is moved to the connecting arm 111) moves in the first direction (FD arrow direction) as it moves in the first direction (FD arrow direction), and the cam protrusion 222 presses the pressing member 23. Accordingly, the rotary member 21 can be moved by pulling the interlocking portion 4 while rotating in the first rotation direction (R1 arrow direction) about the rotation axis 21a. As the driven linkage 4 is pulled and moved by the rotating member 21, the pump linkage 3 is pulled and moved so that the pump lever 210 can be moved to increase the revolutions per minute for the engine have.

In this state, when the forward pedal 112 is rotated in the second rotational direction (the direction of the arrow R2) and is located at the neutral position as the operator steps on the forward pedal 112, Moves in the second direction (SD arrow direction) as the connection arm 111 moves in the second direction (SD arrow direction), and the pressing member 23 is inserted into the cam groove 221. Accordingly, the rotating member 21 can be moved in the second rotating direction (arrow R2 direction) about the rotating shaft 21a while pushing the interlocking portion 4. The pump lever 210 can be moved such that the rotation speed per minute increases with respect to the engine by pushing and moving the pump connection portion 3 as the linkage portion 4 is pushed and moved by the rotation member 21 . In this case, the pump lever 210 is moved by the restoring force provided by the elastic mechanism as the rotating member 21 removes the force pulled by the interlocking portion 4, .

Next, when the operator steps on the reverse pedal 113 and rotates in the first rotation direction (arrow R1 direction) to increase the traveling speed at which the agricultural working vehicle is moved backward, the cam member 22 rotates 111) move in the second direction (SD arrow direction) as the cam member 222 moves in the second direction (SD arrow direction), the cam protrusion 222 presses the pressing member 23. Accordingly, the rotary member 21 can be moved by pulling the interlocking portion 4 while rotating in the first rotation direction (R1 arrow direction) about the rotation axis 21a. As the driven linkage 4 is pulled and moved by the rotating member 21, the pump linkage 3 is pulled and moved so that the pump lever 210 can be moved to increase the revolutions per minute for the engine have.

In this state, when the operator turns his / her foot from the backward pedal 113 and the backward pedal 113 rotates in the second rotational direction (the direction of the arrow R2) and is located at the neutral position, (FD arrow direction) as the connecting arm 111 moves in the first direction (FD arrow direction), and the pressing member 23 is inserted into the cam groove 221. Accordingly, the rotating member 21 can be moved in the second rotating direction (arrow R2 direction) about the rotating shaft 21a while pushing the interlocking portion 4. The pump lever 210 can be moved such that the rotation speed per minute increases with respect to the engine by pushing and moving the pump connection portion 3 as the linkage portion 4 is pushed and moved by the rotation member 21 . In this case, the pump lever 210 is moved by the restoring force provided by the elastic mechanism as the rotating member 21 removes the force pulled by the interlocking portion 4, .

Referring to FIG. 12, the interlocking portion 4 can be guided and moved by the fixing member 24. In this case, the fixing member 24 may include a guide member 241 for guiding the movement of the interlocking portion 24. The interlocking portion 4 may be inserted into the guide member 241 so as to protrude from the guide member 241 and be coupled to the rotary member 21. [ Accordingly, even if the rotation member 21 rotates about the rotation shaft 21a, the linkage 4 can be guided by the guide member 241 and move linearly.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

1: Interlocking device of agricultural working vehicle 2:
3: pump connection part 4:
21: rotating member 22: cam member
23: pressing member 24: fixing member
25: Elastic member 100: Hydraulic stepless transmission
110: Transmission pedal unit 111: Connection arm
112: forward pedal 113: reverse pedal
200: pump connection part 210: pump lever
221: cam groove 222: cam member
231: contact surface 241: guide member

Claims (9)

A speed change connection portion (2) that operates as the speed change pedal portion (110) for controlling the hydraulic CVS (100) installed in the agricultural work vehicle moves;
A pump connection portion (3) coupled to a pump lever (210) for controlling an injection pump (200) installed in the agricultural working vehicle; And
And an interlocking part (4) for connecting the speed change connection part (2) and the pump connection part (3) so that the pump lever (210) moves together as the speed change pedal part (110) Device. The method according to claim 1,
The transmission connection portion 2 includes a rotary member 21 that rotates about a rotary shaft 21a as the transmission pedal portion 110 moves,
The interlocking portion 4 is coupled to the rotary member 21 at a position spaced apart from the rotary shaft 21a,
The direction of movement of the linkage part 4 is changed according to the rotation direction of the rotation member 21 rotating about the rotation axis 21a so that the direction in which the pump lever 210 is moved is changed. Interlocking devices for agricultural working vehicles. 3. The method of claim 2,
The rotating member (21) rotates in a first rotation direction when the traveling speed for the agricultural working vehicle increases, and a second rotation direction opposite to the first rotating direction when the traveling speed for the agricultural working vehicle decreases Lt; / RTI >
The linkage unit 4 moves the pump lever 210 so that the revolutions per minute (RPM) of the engine of the agricultural working vehicle increases when the rotary member 21 rotates in the first rotation direction, Wherein the pump lever (210) is moved so that the number of revolutions per minute for the engine decreases when the rotary member (21) rotates in the second rotation direction. 3. The method of claim 2,
The transmission connection portion 2 includes a cam member 22 that moves as the transmission pedal portion 110 moves and a pressing member 23 coupled to the rotary member 21 at a position spaced apart from the rotary shaft 21a ),
The cam member 22 includes a cam groove 221 for inserting the pressing member 23 and a cam protrusion 222 for pressing the pressing member 23,
When the cam member 22 moves as the speed change pedal unit 110 moves and the cam protrusion 222 presses the pressing member 23, the rotating shaft 21 rotates about the center of the rotating shaft 21a, When the cam member 22 moves and the pressing member 23 is inserted into the cam groove 221 as the speed change pedal unit 110 moves, the rotation shaft 21a is rotated in the first rotation direction, Is rotated in a second rotation direction, which is opposite to the first rotation direction, with respect to the center. The method according to claim 3 or 4,
The transmission connection portion (2) includes a fixing member (24) coupled to the agricultural working vehicle and an elastic member (25) having an elastic force,
The elastic member 25 is coupled to each of the fixing member 24 and the rotary member 21 to provide an elastic force for rotating the rotary member 21 in the second rotation direction, , And the rotation member (21) is rotated in the second rotation direction. 5. The method of claim 4,
The cam protrusion 222 is formed so that the cam surface 222a facing the pressing member 23 is curved,
Wherein the pressing member includes a contact surface that contacts the cam member and has a curved surface and is rotatably coupled to the rotating member. 5. The method of claim 4,
The cam member 22 includes a plurality of the cam protrusions 222,
Wherein the cam protrusions (222) are disposed on both sides with respect to the cam groove (221), and are formed symmetrically with respect to the cam groove (221). 6. The method of claim 5,
The pressing member 23 is coupled to one side of the rotary member 21,
The elastic member 25 is coupled to the other side of the rotary member 21,
Wherein the rotary member is rotated around a rotary shaft disposed between one side of the pressing member and the other side of the elastic member, . 6. The method of claim 5,
The fixing member 24 includes a guide member 241 for guiding the movement of the interlocking portion 4,
Wherein the interlocking portion is inserted into the guide member so as to protrude from the guide member and is coupled to the rotary member.

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