JPH0672181A - Accelerator pedal depression angle regulating device - Google Patents

Abstract

PURPOSE:To prevent noise caused by the increase of engine speed during construction work late at night by regulating the depression angle of the accelerator pedal of a construction machine. CONSTITUTION:A bell crank arm 25 connected to an accelerator pedal 22 is fixedly provided with a stopper bolt 34 and a locking piece 35 which are regulating members. A taper member 38 sliding toward the regulating members is then provided, and a taper part 38b is formed in such a way as to be gradually thinned toward the regulating members.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accelerator pedal depression angle regulating device, and more particularly to a regulating device for a working vehicle such as a construction machine so that the accelerator pedal cannot be depressed beyond a predetermined angle.

[0002]

2. Description of the Related Art Generally, a traveling vehicle such as an automobile is provided with an accelerator pedal, and an arm member is connected to the accelerator pedal to connect an accelerator wire.
By depressing the accelerator pedal, the accelerator wire is pulled through the arm member, and the engine speed increases. Further, when the depression of the accelerator pedal is stopped, the accelerator wire is pulled back by the urging force of the return spring or the like, the engine speed is reduced, and the accelerator pedal also returns to its original position via the arm member.

As for construction machinery, construction work is often carried out at midnight, and the noise of construction work at midnight in an artificially dense area adversely affects the surrounding environment. There is.

[0004]

As described above, since the noise of construction work has become a problem recently, it is necessary to minimize the engine speed of the construction machine in the construction work at midnight. However, during the work, the operator is so enthusiastic about the work that he or she depresses the accelerator pedal too much to cause the engine to rotate at a high speed and generate a lot of noise.

Therefore, there is a technical problem to be solved in order to prevent the engine speed from increasing more than necessary by restricting the depression angle of the accelerator pedal during construction work at midnight. Aims to solve this problem.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned object, and provides an accelerator pedal device in which an accelerator wire is connected to an arm member connected to an accelerator pedal so that the accelerator pedal device can be pushed and pulled freely. In this case, a regulating member is fixedly provided on the arm member, and a taper member that slides toward the regulating member and gradually becomes thinner toward the regulating member is provided in the vicinity thereof, and the taper member is a wire cable or the like. The present invention provides an accelerator pedal depression angle regulation device configured to slide on and off to and from a regulation member.

[0007]

The arm member is rotated in response to the depression operation of the accelerator pedal, the accelerator wire is pulled, and the engine speed increases. A restricting member is fixed to the arm member, and a taper member is provided close to the restricting member. Then, when the operator slides the taper member toward the regulating member with a wire cable or the like and brings the tapering surface of the taper member into contact with the regulating member when the arm member rotates, the rotation of the arm member is prevented. The movement stops, and the accelerator pedal depression operation is restricted.

Therefore, the contact position between the taper member and the regulating member changes depending on the sliding amount of the taper member, and the rotation of the arm member can be stopped at an arbitrary position. That is, the accelerator pedal depression angle can be regulated to an arbitrary angle, and by setting the accelerator pedal depression angle to a small value during the construction work at midnight, the engine does not rise to high rotation more than necessary, and engine noise is reduced. Can be prevented.

[0009]

An embodiment of the present invention will be described in detail below with reference to the drawings. 1 and 2 are overall views of a wheel loader as an example of a construction machine, and include a front vehicle section 13 including a construction machine such as a bucket 11 and an arm 12, and an engine section (not shown) such as an engine and a hydraulic device. ), And a rear vehicle section 16 on which the driver's seat 14 and the operation mechanism 15 are mounted.
A bracket 17 is provided at the center rear part of the front vehicle part 13, and a connecting part 18 is provided so as to project at the center front part of the rear vehicle part 16,
The front vehicle part 13 and the rear vehicle part 16 are connected by pin-connecting the bracket 17 and the connecting part 18. Also, the rear vehicle section 1
The hydraulic cylinder 19 is projected forward from the side of the connecting portion 18 of 6, and the piston rod 19a of the hydraulic cylinder 19 is connected to the side of the bracket 17 of the front vehicle portion 13.

In the wheel loader, the operator operates the operation mechanism 15 to operate the arm 12 and the bucket 11.
Steering mechanism 2 while operating construction machines such as
Operate 0 to turn the front vehicle section 13 to the left and right. For example,
When the operator operates the steering mechanism 20 in the leftward direction, the piston rod of the hydraulic cylinder 19 contracts due to the operation of the hydraulic device, and the front vehicle portion 13 with respect to the rear vehicle portion 16 is contracted.
Is centered around the pin connecting part of the bracket 17 and the connecting part 18,
It rotates counterclockwise in FIG. Therefore, the wheel loader turns left. Also, the rear vehicle section 16
An accelerator pedal 22 is provided on the floor 21 of, and if the operator depresses the accelerator pedal 22,
The wheel loader moves forward or backward.

FIG. 3 shows an embodiment of a depression angle regulating device for the accelerator pedal 22. The accelerator pedal 22 is pivotally attached to a fixture 23 of the floor 21. In the figure, the solid line shows the (A) position when the accelerator pedal 22 is not depressed, and the accelerator pedal 2 is
The lower end of the connecting rod 24 pivotally attached to the rear surface of 2 is connected to one end 25a of the bell crank arm 25, and the inner wire 26 is attached to the other end 25b of the bell crank arm 25.
The fixtures 27 are connected by pins 28. Furthermore,
Outer wire 29 that covers the inner wire 26
Is extended rearward (leftward in FIG. 3 is a rearward direction) to form an accelerator wire, and a front end portion of the outer wire 29 is fastened to a bracket 31 by nuts 30 and 30.

The bell crank arm 25 rotates about a shaft 32, but an arm 33 is fixedly mounted on the other end 25b side, and a stopper bolt 34 is screwed to the arm 33 and the stopper bolt 34 is also provided. To the left and right (Fig. 3
The locking member 35 having a long cylindrical shape is fixed to the regulating member in the direction of the depth of the paper). The height of the locking piece 35 of the stopper bolt 34 is fixed to a predetermined height by the screwing depth of the stopper bolt 34 and the fastening nut 36.
Incidentally, the shape of the locking piece 35 is not limited to the cylindrical shape, but it is needless to say that it may be another shape.

Here, a slide guide 37 having a substantially U-shape when viewed from the front is extended to the bracket 31, and a taper member 38 is loosely fitted in the slide guide 37 so as to be slidable in the front-rear direction. The rear part 3 of this taper member 38
A wire cable 39 is connected to 8a, and by pushing and pulling the wire cable 39, the taper member 38 slides back and forth in the slide guide 37, and the stopper bolt 34 and the locking piece 3 serving as a restricting member.
It is configured so as to be able to come into contact with and detach from the 5.

In the state shown in FIG. 3, the taper member 38 is located rearward, and when the accelerator pedal 22 is fully depressed to the position (B), as shown by the chain double-dashed line, the connecting rod 24 One end 25a of the bell crank arm is pressed downward via the pin, and the bell crank arm 25 rotates about the pin 32 in the clockwise direction in the figure. Therefore,
The inner wire 26 is pulled forward through the attachment 27 connected to the other end 25b of the bell crank arm by the pin 28, and the rotation of the engine (not shown) rises. That is, the accelerator pedal 22 is fully depressed and the engine is fully opened. At that time, the stopper bolt 34 and the locking piece 35 rotate together with the arm 33, but since the taper member 38 is located at the rear side, the locking piece 35 does not contact the tapered portion 38b and the bell crank arm 25 Does not hinder the rotation of the.

Here, when the wheel loader is operated in an artificially dense area at midnight, the depression angle of the accelerator pedal 22 is restricted to the position (C) shown in FIG. 3 in order to minimize the engine noise. . To this end, by operating a lever or the like provided in the driver's seat, the wire cable 39 is pushed to advance the taper member 38.

FIG. 4 shows the taper member 38 advanced along the inside of the slide guide 37.
Since 8b is moved forward, when the locking piece 37, which is a regulating member, rotates clockwise, it comes into contact with the tapered portion 38b, and the stopper bolt 34 and the arm 33 are locked. Therefore, the rotation of the bell crank arm 25 is stopped, and the depression of the accelerator pedal 22 is restricted at the position (C) of FIG. That is, the pulling of the inner wire 26 for the accelerator pedal is stopped at the position shown in FIG. 4, and the rotation of the engine is restricted so as not to rise any more.

Thus, even if the operator unintentionally depresses the accelerator pedal 22 hard during work, the operator will not be stepped beyond the position (C) in FIG. 3, and the engine rotation will be suppressed to a low rotation to carry out construction work at midnight. It is possible to prevent the generation of noise.
The regulating position of the accelerator pedal depression angle can be finely adjusted by the stopper bolt 34 and the fixing nut 36 as described above.

FIG. 5 shows another embodiment.
The accelerator pedal 22 is pivotally attached to the fixture 23 of the floor 21, and the lower end portion of the connecting rod 24 pivotally attached to the rear surface thereof is connected to one end portion 40a of the bell crank arm 40 pivotally attached to the lower surface of the floor 21. . The bell crank arm 4
Reference numeral 0 is rotatable about a shaft 41, and a fitting 43 of an accelerator wire 42 is connected to the other end 40b of the bell crank arm 40. By depressing the accelerator pedal 22, 0 of the accelerator wire 42 is connected. The inner wire is formed so as to be pulled.

A plate 44 is fixed to the other end 40b side of the bell crank arm, and is a substantially fan-shaped plate 4 rotatable about a shaft 45 provided on the lower surface side of the floor 21.
6 between the tip portion 46a of the rod 6 and the plate 44
Connect at 7. Further, a slide member 49 having a bulging portion 48 at the tip is provided on the lower surface of the floor 21, and is supported by a wire cable 50 so as to be slidable back and forth.

Here, when the depression angle of the accelerator pedal 22 is regulated, the wire cable 50 is pulled by the operation of a lever or the like provided in the driver's seat, and the slide member 49 and the expanded portion 48 are shown by the chain double-dashed line. To the rear (Fig. 5
To the left). When that happens, accelerator pedal 2
When stepping on 2, the bell crank arm 40 rotates about the shaft 41 in the counterclockwise direction in the figure. And rod 47
Is pulled and the plate 46 rotates counterclockwise about the shaft 45, and the upper side 46b of the plate 46 contacts the expanded portion 48 of the slide member 49 as shown by the chain double-dashed line in the figure.
Therefore, the rotation of the bell crank arm 40 is stopped, and the accelerator pedal 22 is restricted from being depressed at the position indicated by the chain double-dashed line in the figure, and cannot be further depressed. Thus, it is possible to obtain the same effect as that of the device having the configuration shown in FIGS. 3 and 4.

The present invention can be modified in various ways without departing from the spirit of the present invention, and it goes without saying that the present invention extends to such modifications.

[0022]

The present invention, as described in detail in the above embodiment,
An operator operates a lever or the like in the driver's seat to push or pull the wire cable and slide the taper member. If the taper member is slid so as to come close to the regulating member, the regulating member connected to the accelerator pedal contacts the taper member while rotating by the depression of the accelerator pedal, and the depression angle of the accelerator pedal is kept at a fixed position. Can be regulated.

Therefore, in the construction work in the artificially dense area at midnight, the depression angle of the accelerator pedal can be regulated by a very simple operation, and the generation of engine noise due to excessive depression of the accelerator pedal can be prevented.

[Brief description of drawings]

FIG. 1 is a side view showing an entire wheel loader as an example of a construction machine.

FIG. 2 is a plan view showing the entire wheel loader.

FIG. 3 is a side view showing an embodiment of an accelerator pedal depression angle regulation device.

FIG. 4 is a side view of essential parts showing an operating state of the accelerator pedal depression angle regulation device.

FIG. 5 is a side view showing another embodiment of the accelerator pedal depression angle regulation device.

[Explanation of symbols]

 22 accelerator pedal 24 connecting rod 25 bell crank arm 26 inner wire 29 outer wire 34 stopper bolt 35 locking piece 37 slide guide 38 taper member 38b taper portion

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kenji Eda 3-12-4 Gion, Asanan-ku, Hiroshima-shi, Hiroshima Prefecture Yutani Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1. An accelerator pedal device in which an accelerator wire is connected to an arm member connected to an accelerator pedal so as to be able to push and pull freely, wherein a restricting member is fixedly mounted on the arm member and is directed toward the restricting member. An accelerator pedal characterized in that a taper member that slides and gradually thins toward the regulating member is provided in the vicinity, and the taper member is slid by a wire cable or the like so as to be able to come into contact with and separate from the regulating member. Stepping angle regulation device.