JPH067960Y2 - Accelerator device for mobile agricultural machinery - Google Patents

Description

TECHNICAL FIELD The present invention relates to an accelerator device of a mobile agricultural machine.

2. Description of the Related Art Conventionally, as a structure of an accelerator device in a walking type mobile agricultural machine, as shown in FIG. 6, a handle 2 of a mobile agricultural machine 1 is used.
In general, an accelerator lever 3 is provided on the vehicle, and the accelerator lever 3 and a rotation speed control lever (not shown) for controlling the rotation speed of the engine are connected via a wire 4. The accelerator lever 3 is attached to a position apart from the grip portion 5 of the handle 2.

Problems to be Solved by the Invention When changing the engine speed, the accelerator lever 3 must be operated with one hand removed from the grip portion 5 of the handle 2. For this reason, there is a risk that the mobile agricultural machine 1 may sway or fall when the accelerator lever 3 is operated in a sloping land or a field having a raised shape.

Further, there is a drawback that the operation of the accelerator lever 3 becomes heavy depending on the attachment state of the accelerator lever 3 and the wire 4.

Means for Solving the Problem In a walking type mobile agricultural machine, a rotation speed control lever for controlling the rotation speed of an engine and a drive unit for driving the rotation speed control lever are provided, and a switch operation unit for operating the drive unit is provided. Is provided in the vicinity of the grip portion of the handle, and while the pressing state of the switch operating section is being continued, the driving section is operated to increase or decrease the engine speed to release the pressing state, and then the release position is set. A manual operation position with a shallow push-down position for maintaining the engine rotation speed and automatic operation with a deep push-down position for operating the drive unit so as to raise or lower the engine rotation speed to the maximum rotation speed or idling rotation speed by one pressing Position and provided.

A drive unit is provided to drive the engine speed control lever.
By operating the drive unit by operating the switch operating unit to adjust the engine speed, the engine speed can be easily adjusted with a small operating force. The switch operating part can be operated without releasing the hand from the handle gripping part, so that there is no risk of the mobile agricultural machine wobbling or falling when operating the switch operating part. The stability of the work can be improved by using the switch operation part and the automatic operation position that operates the drive part to raise and lower the engine speed to the maximum speed or the idling speed by pressing once is provided in the switch operation part. As a result, the engine speed can be increased to the maximum speed or lowered to the idling speed even when the switch operating part is released. It is to be possible, continuously switch operation unit to improve operability to become unnecessary to continue to manually operated and is capable to further improve the safety of the work.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 to 5. The same parts as those described in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted. First, the engine 7 is mounted on the front portion of the chassis 6 of the mobile agricultural machine 1, and the mission case 8 is fixed on the rear portion of the chassis 6. A handle 2 including a main handle 9 and a pipe handle 10 is attached to an upper portion of the mission case 8, and a pair of left and right grips 5 are provided at a rear end portion of the pipe handle 10. A control box 12 accommodating a control circuit unit 11 is attached to the pipe handle 10, and a servo motor 13 as a drive unit is connected to the control circuit unit 11. The servomotor 13 is connected to a throttle lever 14 which is a rotation speed control lever of the engine 7.

Next, the switch handle 15 is attached to the pipe handle 10 in the vicinity of the grip 5. The switch operating unit 15 has an up switch 16 and a down switch 17, and is connected to the control circuit unit 11. Further, the switches 16 and 17 are
As shown in FIG. 3, the push-down position has a shallow manual operation position and the push-down position has a deep automatic operation position. Further, the power output unit 18 of the engine 7 is connected to the control circuit unit 11.

In such a configuration, when the switch operating unit 15 is operated while the engine 7 is in the operating state, the switch operating unit 15
Outputs a throttle position command signal to the control circuit unit 11, and the control circuit unit 11 outputs an operation command signal to the servo motor 13 based on the throttle position command signal. When the servo motor 13 rotates, the throttle lever 14 rotates, the fuel injection amount is increased or decreased, and the rotation speed of the engine 7 is increased or decreased. When operating the switch operating unit 15, the operator can operate the switch operating unit 15 while holding the grip portion 5, so that the switch operating unit 15 can be operated even in the case of work on a sloping ground or a raised field. There is no risk of the mobile agricultural machine 1 wobbling or falling due to the operation.

Next, a specific operation for increasing the engine speed will be described. When the up switch 16 of the switch operating unit 15 is pressed, the servo motor 13 rotates counterclockwise by the work command signal from the control circuit unit 11, and the throttle lever 14 rotates counterclockwise (direction of arrow A). . As a result, the fuel injection amount increases and the engine speed increases.

When the up switch 16 is pushed down to the manual operation position shallowly, the servo motor 13 continues to rotate and the engine speed continues to increase.
When the finger is released from, the up switch 16 returns to the original position, the rotation of the servo motor 13 is stopped, and the engine speed at that time is maintained. Also, when the up switch 16 is pushed deep down to the automatic operation position,
When the up switch 16 is locked in the automatic operation position, the rotation of the servo motor 13 continues even if the operator releases the up switch 16, and the rotation of the servo motor 13 is reached when the engine speed reaches the maximum. When is stopped, the engine speed is maintained at the maximum speed.

Next, a specific operation for lowering the engine speed will be described. When the down switch 17 of the switch operating unit 15 is pressed, the servo motor 13 rotates clockwise by the operation command signal from the control circuit unit 11, and the throttle lever 14 rotates clockwise (direction of arrow B). As a result, the fuel injection amount decreases and the engine speed decreases.

When the down switch 17 is pushed down to the manual operation position shallowly, the servo motor 13 continues to rotate and the engine speed continues to decrease.
When the pressed state is released, the rotation of the servomotor 13 is stopped and the engine speed at that time is maintained. Further, when the down switch 17 is deeply pushed down to the automatic operation position, the down switch 17 is locked at the automatic operation position, and the rotation of the servo motor 13 continues even if the operator removes the finger from the down switch 17. The rotation of the servo motor 13 is stopped when the engine speed reaches the minimum, and the engine speed is maintained in the idling state.

In the present embodiment, the power output unit 18 of the engine 7 is used as the power source of the control circuit unit 11 and the servo motor 13, but a battery may be used.

As described above, the present invention provides a walking type mobile agricultural machine with a rotation speed control lever for controlling the rotation speed of an engine and a drive unit for driving the rotation speed control lever, and operates the drive unit. A switch operating portion is provided in the vicinity of the grip portion of the handle, and while the switch operating portion is kept in the pressed state, the drive portion is operated to increase or decrease the rotation speed of the engine to release the pressed state. A push-down position for maintaining the engine speed at the release position and a push-down position for operating the drive unit so as to raise or lower the engine speed to the maximum speed or the idling speed by pressing once Since a deep automatic operation position is provided, a drive unit for driving the engine speed control lever is provided, and this drive unit is operated by operating the switch operation unit. By adjusting the engine speed, the engine speed can be easily adjusted with a small operating force. In addition, the switch operating part is provided close to the handle grip, so that the handle grip It is possible to operate the switch operation unit without removing the hand from the switch, and therefore, it is possible to improve the safety of work by eliminating the risk of the mobile agricultural machine wobbling or falling when operating the switch operation unit. , The switch operating part has an automatic operating position that activates the drive unit to raise or lower the engine speed to the maximum speed or idling speed by pressing once, so even if you release your hand from the switch operating unit. The engine speed can be raised to the maximum speed or lowered to the idling speed, and the switch operating part can be operated manually continuously. And it improves the operability because the unnecessary continues, and those having an effect such as can be further improved work safety.

[Brief description of drawings]

1 to 5 show an embodiment of the present invention. FIG. 1 is a side view showing a mounting state of a switch operating portion, and FIG.
FIG. 4 is a wiring system diagram, FIG. 3 is a side view showing a state where the switch operating portion is operated to a manual operation position and an automatic operation position, and FIG.
The figure shows a side view of the throttle lever and servomotor.
FIG. 5 is a side view showing the entire mobile agricultural machine, and FIG. 6 is a plan view showing a conventional example. 1 ... Mobile agricultural machine, 2 ... Handle, 5 ... Gripping part, 7 ...
… Engine, 13 …… Drive section, 14 …… Rotation speed control lever, 15 …… Switch operation section

Claims (1)

[Scope of utility model registration request] 1. A walking type mobile agricultural machine is provided with a rotation speed control lever for controlling a rotation speed of an engine and a drive unit for driving the rotation speed control lever, and a switch operation unit for operating the drive unit is provided on a handle. The engine is provided near the grip portion, and when the switch operating portion is kept pressed, the drive portion is operated to increase / decrease the rotation speed of the engine to release the pressed state. There are a manual operation position where the push-down position that maintains the rotation speed of the engine is shallow and an automatic operation position where the push-down position that operates the drive unit is deep so that the engine speed is raised or lowered to the maximum rotation speed or the idling rotation speed by one pressing. An accelerator device for a mobile agricultural machine characterized by being provided.