JPH0647345B2 - Mobile farm work machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a mobile agricultural work machine configured by mounting a working device on a traveling vehicle body such as a seedling planting machine, which is suitable for turning at the shore. This is intended to improve operability.

[Conventional technology]

Wheels that are rotated by the power of a prime mover are provided on a traveling vehicle body, and a working device mounted on the running car body is also driven by the prime mover, so that a mobile farm work machine moves forward to perform agricultural work.

[Problems to be Solved by the Invention]

If the mobile agricultural machine approaches the breeze during the work, the machine will turn (U-turn) and turn in the forward direction. At the time of this turning, the operation of the work device is stopped, and the rotation speed of the wheels is lowered to ensure work safety. Then, when this turning is completed, the driving of the work device is restarted, but at the beginning of the restart, the operator confirms whether or not the mobile agricultural work machine is in the proper position with respect to the outward path, and is in the improper position. Then, operate the steering device to correct the position. During the confirmation and correction, if the mobile farm work machine is moving forward at a high speed, an improper state for the forward path of the mobile farm work machine occurs for a long time. That is, it is preferable that the mobile farm work machine moves forward at high speed during the work, but it is desirable that the speed is low during turning and at the beginning of the turning operation.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a power transmission from the prime mover 5 to the working device 2 while providing a rotation speed of the wheels 9 that rotate by receiving the power of the prime mover 5 and a transmission 35 that shifts between high speed and low speed. A work clutch 3 for connecting and disconnecting the work clutch 3 is provided, and when the work clutch 3 is turned on or off, the speed change device 35 shifts from high speed to low speed, but the work clutch 3 is turned on or off. In this case, the transmission 35 is a mobile agricultural working machine characterized by being provided with a connecting mechanism configured so as not to shift.

[Action effect]

According to the present invention, when the power transmitted from the prime mover 5 to the work device 2 by the work clutch 3 is cut off, the rotation of the wheels 9 automatically changes from high speed to low speed. The operation of the device 2 can be stopped and the forward speed can be slowed by a single operation, and the mobile agricultural work machine can be safely and easily turned (U-turn).
Can be made. After the turning is completed, even if the disengaged power is connected by the work clutch 3, the wheel 9 is maintained in the low speed state, so that the vehicle travels to the forward path in the low vehicle speed state. You can check the position and easily modify it if necessary.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 1 and FIG. 2, the seedling planting device 2 which is one of the working devices 2 is attached to the rear part of the traveling vehicle body 1 to form one seedling planting device of a mobile agricultural device.

A pair of transmission cases 11 and 11 extend rearward from both sides of the front part of the traveling vehicle body 1 also serving as a transmission case, and wheels 9 and 9 at the lower ends thereof are attached by axles 10 and 10. Prime mover 5
Is provided in the front part of the traveling vehicle body 1, the power of which is transmitted to the above-mentioned wheels 9 via a transmission 35 which will be described later, and the rotation of the wheels 9 causes the mobile agricultural work machine to move forward. The seedling planting device 2 is provided with an inclined rear height and is moved back and forth to the left and right. It is composed of the seedling planting rods 14 and 14 which are transplanted to the mud soil. A work clutch 3 (not shown) is provided in the power transmission path between the transmission 35 and the seedling planting device 2, and when the planting clutch lever 22 is turned clockwise (Fig. 1), the transmitted power is cut off and the anti clutch When turned clockwise, the disconnected power is connected.
Then, receiving this power, the above-mentioned seedling stand 13 and seedling planting rod 1
4 and 14 are activated to perform seedling planting work.

A hydraulic cylinder 7 is attached to the center of the traveling vehicle body 1, a piston rod 8 extends rearward from this, and the oil discharged from the pump 26 passes through the control valve 6 to the hydraulic cylinder 7.
The piston rod 8 comes in and goes out of the front chamber or the rear chamber. The arms 18, 18 extend upward from the front ends of the transmission cases 11, 11 and both ends of the horizontal rod 36 attached to the rear end of the piston rod 8 and the respective arms 1.
The upper ends of 8, 18 are connected by rods 19, 19, and when the piston rod 8 is retracted, the transmission cases 11, 11 rotate around the shaft 12 at the front end thereof, and the wheels 9, 9 at the rear end move up and down. It is designed to move. A float 15 is arranged on the lower abdomen of the traveling vehicle body 1, a rear end portion of the traveling vehicle body 1 is rotatably attached to the traveling vehicle body 1 by a support shaft 16, and its front portion and the control valve 6 are connected by a connecting rod 17. Float 15 has spindle 16
This control valve 6 switches the oil passage between the pump 26 and the hydraulic cylinder 7 when it is swung around.

As shown in FIG. 3, a transmission device by the belt 20 is provided between the output shaft 37 of the prime mover 5 and the input shaft 38 of the pump 26, and the pump 26 is driven by the prime mover 5. .

The transmission 35 is configured as follows. That is,
The adjusting wheel 2a is fixed to the output shaft 37 and the adjusting wheel 21b provided on the input shaft 27 protruding from the traveling vehicle body 1
1 is wrapped around to form a low speed transmission path. The adjusting belt 39 is wound around the adjusting wheel 39a fixed to the output shaft 37 and the adjusting wheel 39b fixed to the input shaft 27 to form a high-speed transmission path. Therefore, the adjustment wheels 39a, 3 on the adjustment band 39 side
9b has a larger diameter on the output shaft 37 side than the adjusting wheel 21a on the adjusting band 21 side, and a smaller diameter on the input shaft 27 side than the adjusting wheel 21b on the adjusting band 21 side. The belt 39 is loosely wound around the respective wheels 39a and 39b, and when the tension roller 24 is pressed and stretched, the rotation of the output shaft 37 is transmitted to the input shaft 27, but the tension roller 24 is lowered. Then, when the tension is loosened, the adjusting wheel 39a and the adjusting band 39 idle so that the rotation of the output shaft 37 does not reach the input shaft 27. Also, the input shaft 27
A ratchet 29 is provided between the belt 21 and the wheel 21b of the belt 21, and when the belt 39 is loose, the rotation of the output shaft 37 reaches the input shaft 27 at the belt 21, and when the belt 39 is stretched,
The rotation of the input shaft 27 reaches the input shaft 27 in the band 39, and the input shaft 27 rotates faster than the adjusting wheel 21b and spins idle.

As shown in FIG. 1, a handle 40 extends rearward from the rear end of the traveling vehicle body 1 under the seedling mounting table 13, and the operating device 4 is provided at the rear end thereof. As shown in FIG. 3, the operating device 4 is composed of a pair of a planting clutch lever 22 and a high speed lever 28 which are rotatably attached to a horizontal shaft 23. The planted clutch lever 22 is configured as described above, and when the high speed lever 28 rotates counterclockwise in FIGS. 1 and 3, the wire 25 is pulled and the tension roller 24 is raised. , When the band 39 is stretched and rotated clockwise, the wire 25 loosens and the tension roller 2
It is designed such that 4 is lowered and the band 39 is loosened. further,
When the arm 30 fixed to the high speed lever 28 extends below the planted clutch lever 22 (Fig. 3) and the planted clutch lever 22 is rotated clockwise to cut off the transmission power by the work clutch 3, the planted clutch lever 22 is released. The middle portion of the lever 22 pushes down the arm 30 and pushes and rotates the high speed lever 28 in the same direction, the wire 25 loosens, and the tension roller 24 loosens the band 39. That is, when the operation of the planting clutch lever 22 is stopped and the operation of the seedling planting device 2 is stopped, the rotation of the output shaft 37 automatically shifts from the band 39 side of the high speed path to the band 21 side of the low speed outward path, and the wheels 9 and 9 rotate at low speed. When the work clutch 3 operates the planted clutch lever 22 in the state where the power transmission is cut off as described above, when the work clutch 3 is operated in the counterclockwise direction, the wire is pulled and the power transmission that the work clutch 3 has been disconnected until now is transmitted. To resume.
At this time, the high-speed lever 28 remains at that position and does not rotate counterclockwise, so that it does not automatically return to high-speed transmission. As described above, when the working clutch 3 is turned on or off by the arm 30 that connects the planted clutch lever 22 and the high speed lever 28, the transmission 35 is shifted from high speed to low speed, but the work clutch 3 is turned off. Even if the transmission is turned on, the transmission 35 has a connection mechanism that does not change the speed.

In addition, as shown in FIG.
It can be attached to the high-speed lever 28 so that it can be rotated around the end, and the above-mentioned interlocking can be released.
When the planted clutch lever 22 is sandwiched by the small arm 32 that does not project beyond the tip of the arm 30, as shown in FIG. 5, the respective levers 22 and 28 are independent,
As shown in FIG. 7, the levers 22 and 28 are linked to each other in a reciprocating manner, and as shown in FIG. 6, the levers 22 and 28 are linked to the high-speed lever 28 only when the planted clutch lever 22 is operated to the cut side. be able to.

[Brief description of drawings]

FIG. 1 is a side view of a mobile farm work machine to which the invention is applied, and FIG.
The drawing is a plan view of a part thereof, FIG. 3 is an enlarged perspective view of the part, and FIG. 4 is a perspective view of a part showing another embodiment.
FIGS. 6, 6 and 7 are plan views showing the operating state. [Explanation of reference symbols] 2 ... work device, 3 ... work clutch 5 ... motor, 9 ... wheels 35 ... transmission device

Claims (1)

[Claims] Claim: What is claimed is: 1. A transmission 35 for changing the rotational speed of a wheel 9 which rotates by receiving the power of a prime mover 5 between a high speed and a low speed, and a work clutch 3 for connecting and disconnecting the power from the prime mover 5 to the work device 2. The transmission 35 and the work clutch 3 are provided such that when the work clutch 3 is turned on or off, the speed changer 35 shifts from high speed to low speed. Is a mobile agricultural work machine characterized by being provided with a connecting mechanism configured so as not to shift.