JPH0821266A - Engine control device for running working machine - Google Patents

Abstract

PURPOSE:To perform control of an engine even during a work at a slope and to perform proper and safe operation of a working machine, such as elevation and the bucket of a front loader. CONSTITUTION:Formation of a running working machine, such as tractor, is such that a running machine body 1 is provided with a working machine B, such as a front loader, operated by a hydraulic device driven by an engine 3, a control lever 8 to control operation of the working machine B is arranged in the vicinity of a running handle 4a, and a control lever 9 for operation by hands and a control lever 9a for operation by feet to control rotation of an engine 3 are provided. The control lever 8 for the working machine B is provided with a control member 9b which is linked to the governing member of an engine and regulates rotation of the engine 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine control device for a traveling working machine for operating a working machine such as a front loader mounted on a traveling working machine such as a tractor.

[0002]

2. Description of the Related Art Conventionally, a working machine such as a cultivator is provided at a rear part of a machine body of an agricultural tractor so that it can be moved up and down, and a working machine such as a front loader can be moved up and down at a central part of the machine body through a hydraulic device such as a hydraulic cylinder. Is attached to. A control lever for manual operation and a control lever for foot movement are installed near the driving handle in the driver's seat so that the engine can be operated by either hand or foot, and the engine rotation can be adjusted by these control levers. At the same time, by operating the operating lever for operating the hydraulic cylinder, the front lever is moved up and down, and the bucket portion is rotated.

[0003]

However, according to the conventional device, the control operation of the engine at the time of the work of the front loader is carried out by holding the traveling handle with the left hand, and the right hand is operated by the front operation lever. Since it is necessary to operate the foot pedal frequently, the right foot is used to operate the foot pedal as a control lever for moving the foot.

On the other hand, in the case of sloping ground work, the left foot is on the running clutch while the right foot is on the brake pedal to operate the vehicle.
The engine could not be controlled, and the lifting and lowering of the front loader and the rotating operation of the bucket could not be performed at an appropriate speed, which not only made the work inefficient, but also involved danger. SUMMARY OF THE INVENTION It is an object of the present invention to provide an engine control device for a traveling work machine that can solve the problems of the above conventional device.

[0005]

In order to solve the above problems, the present invention provides a traveling machine body 1 with a working machine B such as a front loader which is driven by an engine 3 and operated by a hydraulic system, and a traveling handle 4a. An operating lever 8 for operating the working machine B is provided in the vicinity of
In a traveling work machine such as a tractor having a manual control lever 9 for operating the rotation of the engine and a foot control lever 9a, the operation lever 8 of the work machine B is connected to the speed governing member 3a of the engine 3 of the engine 3. It is characterized in that an operation member 9b for adjusting rotation is provided.

[0006]

[Operation] When the traveling machine body 1 is stopped on a sloping ground and the working machine B such as the front loader is operated, the working machine B is operated by the operation lever 8 and the operation installed on the operation lever without releasing the hand. The engine 3 is operated by operating the member 9b.
The rotation of can be adjusted, and desired work can be performed safely and appropriately.

[0007]

Embodiments of the present invention will be described with reference to the drawings.
A shows a tractor in which an engine 3 is mounted in front of a traveling body 1 having front wheels 2 and rear wheels 2a, and a driver's seat 4 is provided at a rear portion of the traveling body 1, and B shows a mounting support frame 5 at a central portion of the body 1. It is a front loader (working machine) detachably attached via a base. A base portion of a frame 6 thereof is supported by the attachment support frame 5 by a pivot shaft 5a, and a middle portion thereof can be rotated up and down by expansion and contraction of an elevator cylinder 7. Supported by. The frame 6 is provided with a bucket 6a rotatably operated by a rotating cylinder 7a around a pivot shaft 6b.

Each cylinder 7, 7 of the front loader B
a is a pressure oil device of a hydraulic pump (not shown) that is directly connected to the engine 3 and a reciprocating expansion / contraction movement by switching a hydraulic circuit through a switching valve 8a with an operating lever 8 via a conduit 8b. Thus, the front loader B can be brought into a desired work posture. Reference numeral 9 denotes an engine 3 provided so as to project rightward from the handle 4a of the driver's seat 4 on the hand side.
9a is a control lever for moving a foot, which is installed below the handle 4a at the foot. And both control levers 9 and 9 above
a is connected to a link arm 3c attached to the end of a rod 3b extending rearward from the speed governing member 3a of the engine 3 through a link 10 and a wire 10a provided at the base of each a, Separately, the engine speed is controlled to be adjustable.

9b shown in FIG. 3A is the operation lever 8
It is a control lever (control knob) attached to the grip of the control lever. This control lever 9b is shown in FIG.
As shown in (B), a switch system is used, the contacts are switched by the switching operation, and the motor 3d connected to the speed control member 3a is rotated in the forward and reverse directions, so that the pushing member 3 is moved.
It is configured so that the rotation of the engine 3 can be adjusted to a desired speed by reciprocating e.

A brake pedal 11 is provided on the lower right side of the foot of the steering wheel 4a in front of the driver's seat 4, and a clutch pedal (not shown) is provided on the other side. Next, the operation of the front loader B by the tractor A configured as described above will be described. A) When the bucket 6a is moved up and down and rotated on a flat ground, the handle 4a is grasped with the left hand to operate the movement of the body 1, the operation lever 8 is extended and retracted with the right hand, and the control lever 9a is operated with the left foot. The pressing operation allows the rotation of the engine 3 to be freely adjusted as desired according to the situation such as the work load.

(B) However, when the front loader B is operated by pressing the brake with the right foot to brake or stop the machine body 1 as in a sloping ground, the control lever 9a cannot be operated with the right foot. Therefore, by operating the control lever 9b (knob) with the finger while operating the operation lever 8 with the right hand, the engine 3
The work speed of the front loader B can be appropriately adjusted by adjusting the rotation of the work loader B to perform the work of the work implement B on a sloping ground or the like favorably and safely and efficiently. Further, the body 1 can be adjusted to a normal proper speed when the brake is released.

As a control lever to be mounted on the operating lever 8, a hand accelerator type grip lever 9c is provided at the grip portion of the operating lever 8 as shown in FIG. 4, and a link arm of the engine 3 is provided through a wire 9d. 3c
Alternatively, the speed control member 3a can be operated by being connected to.

[0013]

The engine control device for a traveling work machine according to the present invention includes a working machine B such as a front loader operated by a hydraulic system driven by the engine 3 on the traveling machine body 1,
An operation lever 8 for operating the working machine B is provided in the vicinity of the traveling handle 4a, and traveling work such as a tractor having a manual control lever 9 for operating the rotation of the engine 3 and a foot control lever 9a. In the machine, the operating lever 8 of the working machine B is provided with an operating member 9b which is linked to the speed governing member 3a of the engine and adjusts the rotation of the engine 3.

Therefore, when the work machine B such as the front loader is operated by braking or stopping the machine body 1, the rotation of the engine 3 can be adjusted by the control lever 9b provided on the operation lever 8 which controls the work machine B. Therefore, it is possible to easily and satisfactorily perform highly safe work while reliably braking the machine body 1 on a sloping ground or the like.

[Brief description of drawings]

FIG. 1 is a side view showing a tractor equipped with a front loader as an example of a working machine.

FIG. 2 is a side view showing a main part of the engine.

FIG. 3 (A) is a schematic side view showing a configuration of an operation lever. (B) It is a circuit diagram of an operation lever.

FIG. 4 is a side view showing another embodiment of the operating lever.

[Explanation of symbols]

1 traveling machine body 3 engine 4a handle (traveling handle) 8 operating lever 8a switching valve A tractor (traveling work machine) B front loader (working machine)

Claims (1)

[Claims] 1. A traveling machine body 1 is provided with a working machine B such as a front loader operated by a hydraulic device driven by an engine 3, and an operating lever 8 for operating the working machine B is provided near a traveling handle 4a. In a traveling work machine such as a tractor that is provided with a manual control lever 9 for operating the rotation of the engine 3 and a foot control lever 9a, the operating lever 8 of the work machine B is attached to the operating lever 8 of the engine.
An engine control device for a traveling work machine, which is provided with an operating member 9b that is connected to the control member 9b to adjust the rotation of the engine 3.