JPH0622172U - Hydraulic lifting operation device for agricultural tractor - Google Patents

Abstract

(57) [Summary] [Purpose] To smoothly operate the hydraulic lifting operation device. [Structure] An agricultural tractor in which a rotary device (8-1) is connected to the rear part of the machine body and which can be vertically moved up and down by a hydraulic lifting device (8). In the vertical operation of the hydraulic lifting device (8) and a PTO shaft (19)
An operation switch (17) for simultaneously performing ON / OFF operation of the driver is provided at the foot portion (18) of the driver.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operating device for an agricultural tractor to which a rotary working machine is connected.

[0002]

[Prior art]

 Conventionally, the operating part of an agricultural tractor has a steering handle at the front position, an auxiliary shift lever at the left side of the driver's seat, and a hydraulic lifting operation lever and a main shift lever at the right side. It is provided. In addition, the main clutch pedal is provided on the left side of the driver's feet, and the brake pedal is provided on the right side.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional type, when performing rotary work with an agricultural tractor, at the same time as operating the steering handle with the left and right hands, at the same time as operating the main shift with the right hand in the headland, the hydraulic lifting operation lever is also operated. It was necessary to rotate the machine while operating it to raise the rotary working machine, and the operation was complicated and an accident was likely to occur.

[0004]

[Means for Solving the Problems]

 Therefore, in the present invention, in the agricultural tractor in which a rotary device is connected to the rear part of the machine body and which can be moved up and down by a hydraulic lifting device, an operator operates an operating switch for simultaneously operating the hydraulic lifting device up and down and turning the PTO shaft on and off. It is intended to provide a hydraulic lifting / lowering operation device for an agricultural tractor, which is provided at the foot portion of the.

[0005]

【Example】

 An embodiment of the present invention will be specifically described with reference to the drawings. 1 is a machine body of an agricultural tractor, and an engine 2 is mounted on a front portion of the machine body 1 and a main clutch device 3 is provided. Reference numeral 4 is a hood that covers the upper portion of the engine 2, and 5 is a front wheel.

Further, 6 is a transmission case provided in the rear part of the machine body 1, 7 is a hydraulic cylinder, 8 is a hydraulic lifting device for vertically moving the rotary device 8-1, and 9 is a lift arm. 10 is a rear wheel, 11 is a driving section, and a steering steering wheel 13 is attached to a dashboard 12.

Reference numeral 14 is a main speed change lever provided at the right side position of the driver's seat 15, and 16 is a manual hydraulic lift lever provided at a rear upper position of the main speed change lever 14.

Reference numeral 17 denotes an operation switch provided on the foot 18 of the driver. The operation switch 17 is configured so that the hydraulic lifting device 8 and the PTO shaft 19 can be turned on and off at the same time. There is. Reference numeral 20 denotes a changeover switch for changing the ON / OFF operation of the operation switch 17 and the PTO shaft 19 side between the linked state and the non-linked state.

Reference numeral 21 is a clutch pedal provided on the step 22 on the left foot side of the driver, and 23 is a brake pedal provided on the step 24 on the right foot side of the driver, which includes the left brake pedal 23-1 and the right brake pedal 23. -2.

The present invention is configured as described above. Therefore, when a rotary work is performed by an agricultural tractor, the rotary device 8-1 is grounded while the rotary device 8-1 is grounded in a straight part in the field.

Then, when the machine body reaches the headland, the driver operates the operation switch 17 with his toes to operate the hydraulic lifting device 8 to rotate the lift arm 9 upward. As a result, the rotary device 8-1 rises, and at the same time, the PTO shaft 19 stops.

Then, when the steering wheel 13 for steering is operated to turn the machine body to be in a straight traveling state, the operation switch 17 is operated. As a result, the hydraulic lifting device 8 is activated to lower the lift arm 9, and at the same time, the PTO shaft 19 is turned.

Therefore, the rotary device 8-1 allows the machine body to move straight while plowing a field scene.

When the operation switch 17 and the PTO shaft 19 are not to be interlocked with each other, the changeover switch 20 is turned off.

As described above, according to the above-described embodiment, the up / down operation of the hydraulic lifting device 8 of the agricultural tractor and the on / off operation of the PTO shaft 19 are simultaneously performed by the operation switch 17, and the operation switch 17 is operated by the driver. Since it is provided at the foot portion 18 of the vehicle, the driver can direct his left and right hands only to the steering wheel operation when turning the aircraft, so the operation of the aircraft can be performed accurately and stably. It is a thing. Moreover, since the operation is simple, the tractor work as a whole can be efficiently performed without accidentally making an erroneous operation.

Further, when the interlocking of the on / off operation of the operation switch 17 and the PTO shaft 19 is stopped, the changeover switch 20 can be turned off.

Further, FIG. 4 shows another embodiment, which is an improvement of a near side accelerator lever for adjusting the rotation of the engine.

In the figure, reference numeral 40 denotes a hand side accelerator lever, which connects an accelerator rod 41 in the vertical direction in the dashboard. Reference numeral 42 denotes a stopper fixed to the lower side of the accelerator lever 40, and the stopper 42 is configured to come into contact with a disc-shaped eccentric cam 43 provided on the upper surface of the operation panel. Then, the maximum rotation of the engine can be restricted by rotating the eccentric cam 43 to change its position.

Further, as a regulation method, the regulation arm 44 may be fixed to the intermediate portion of the accelerator rod 41 and the tip of the adjustment screw 45 may be brought into contact with the regulation arm 44.

The lower end of the accelerator rod 41 is connected to the foot accelerator, and a lateral pin 46 may be fixed to the accelerator rod 41 at a position near the foot step and regulated by an adjusting screw 47.

[0021]

[Effect of device]

 According to the present invention, the up / down operation of the hydraulic lifting device of the agricultural tractor and the on / off operation of the PTO shaft are simultaneously performed by the operation switch, and the operation switch is provided at the foot of the driver. Since the left and right hands can be directed only to the steering wheel operation when turning the aircraft, the aircraft can be operated accurately and stably. Moreover, since the operation is simple, the tractor work as a whole can be efficiently performed without accidentally performing an erroneous operation.

[Brief description of drawings]

FIG. 1 is an overall side view of an agricultural tractor.

FIG. 2 is a side view of the main part of the present invention.

FIG. 3 is a perspective view of the same.

FIG. 4 is a perspective view showing another embodiment.

[Explanation of symbols]

 3 Hydraulic lifting device 8-1 Rotary device 17 Operation switch 18 Foot 19 PTO shaft

Claims (1)

[Scope of utility model registration request] 1. An agricultural tractor in which a rotary device (8-1) is connected to the rear part of the machine body and can be vertically moved up and down by a hydraulic lifting device (8).
A hydraulic lifting operation device for an agricultural tractor, wherein an operation switch (17) for simultaneously performing an on / off operation of (19) is provided at a foot portion (18) of a driver.