JP2584931Y2 - Travel lever device for construction machinery - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling lever device with a pedal, which is mainly provided in construction machines such as hydraulic excavators and working vehicles.

[0002]

2. Description of the Related Art FIG. 9 is a perspective view of a main part showing the inside of a cab 1 for a hydraulic excavator (not shown). In the figure,
2 is a cab of the cab 1, 3 is a floor plate, 4 is a driver's seat, 5L and 5R are left and right working operation levers, 6 is a traveling lever device, 7L and 7R are left and right traveling levers of the traveling lever device 6, 8L and 8R is a pedal fixed to the travel levers 7L and 7R, respectively, and 9L and 9R are left and right footrests.
FIG. 10 is a partially cutaway side view of the traveling lever device 6. Since the traveling lever device 6 is configured to be symmetrical, the left traveling lever 7L will be described. FIG.
At 0, 10 is a lever base end bracket of the traveling lever 7L, 8L is a pedal, 11 is a traveling hydraulic remote control valve, 12
Is a boot covering the vicinity of the fulcrum portion 0 of the hydraulic remote control valve 11.

[0003] In the traveling lever device 6 of the prior art, the traveling levers 7L and 7R for manual operation are connected to a pedal 8 for depressing operation.
L and 8R are fixedly attached. Thus, the driver can move by moving his or her hands or operating the traveling levers 7L, 7R or 8L, 8R.

[0004]

In the traveling lever device of the prior art, the traveling lever is moved forward by depressing a front portion of a pedal fixed to a lever base end fitting of the traveling lever.
In addition, the reverse is performed by depressing the rear portion of the pedal. For this reason, the side view of the pedal is formed in a V-shape. Was. Ergonomically, it is better to perform the forward stepping operation while stabilizing the heel of the foot, but this has not been possible. An object of the present invention is to provide a traveling lever device that can solve the above-described problems.

[0005]

In the traveling lever device according to the present invention, a front pedal is mounted on a lever base end fitting, and a rear pedal is rotated in the front-rear direction about the base shaft with respect to the lever base end fitting. A knob that can be movably mounted and that can be pressed on the upper surface of the front pedal is provided.A slot is formed in the base shaft of the rear pedal, and when the knob is not pressed, it is connected via the bar and link of the knob. By setting the hook portion of the link to the slot portion so as to lock the rear pedal so that the rear pedal can be depressed, and pressing the knob when the front pedal is depressed, the link is hooked to the slot portion. The rear part is disengaged to release the locked state of the rear pedal. Further, a spring member acting on the lever base end fitting and the rear pedal is provided on the base shaft so as to urge the rear end side of the rear pedal against the lever base end fitting by lifting the rear end side about the base shaft.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing the structure of the traveling lever device 13 of the present invention. The traveling lever device 1
Since 3 is symmetrical, the left portion will be described as a representative. In FIG. 1, 14L is a left traveling lever, 15 is a lever base bracket of the traveling lever, 16 is a front pedal, 17 is a rear pedal, 18 is a base shaft of a rear pedal 17, and 19 is an upper surface of the front pedal 16. Knob provided on the 20
Is the bar of the knob 19, 21 is the first link, 22 is the pivot pin of the first link 21, 23 is the second link, 24 is the pivot pin of the second link 23, and 25 is the hook of the link 23. , 26 is a slot formed in the base shaft 18, 27 is a hydraulic remote control valve, 28 is a boot, and 29 and 30 are spring members, respectively.

FIG. 2 is a diagram viewed from AA in FIG.
FIG. 3 is a perspective view of the knob 19. FIG. 4 is a perspective view of the first link 21. FIG. 5 is a perspective view of the second link 23. FIG. 6 is a perspective view of the rear pedal 17.
FIG. 7 is a side view showing a state when the front pedal 16 of the traveling lever device 13 in FIG. 1 is depressed.

Next, the traveling lever device 1 according to the first aspect of the present invention.
3 will be described with reference to FIGS. In the present invention, a front pedal 16 is attached to a lever base end fitting 15, and a rear pedal 17 is attached to the lever base end fitting 15 so as to be rotatable in the front-rear direction about a base shaft 18 thereof. A knob 19 that can be pressed is provided on the upper surface of the pedal 16, and a slot 26 is formed in the base shaft 18 of the rear pedal 17. When the knob 19 is not pressed, the bar 20 of the knob 19
The first pedal 21 and the second link 23 are set so that the hook 25 of the link 23 is fitted into the slot 26 so as to lock the rear pedal 17 so that the rear pedal 17 can be depressed. By pressing the knob 19 during the stepping-in operation, the hook 25 of the link 23 with respect to the slot 26 is released, and the locked state of the rear pedal 17 is released.

Next, the operation of the traveling lever device 13 of the present invention will be described. First, when the knob 19 is not pressed, the knob 19 protrudes from the upper surface of the front pedal 16 by a dimension h (shown in FIG. 1) by the spring force of the built-in spring member 29. And the hook 25 of the second link 23
Is fitted in the slot 26 of the base shaft 18. In this state, since the rear pedal 17 is locked with respect to the lever base end fitting 15, the hydraulic shovel (not shown) can be moved backward by depressing only the rear pedal 17. Next, when the front pedal 16 is depressed, the knob 19 is also depressed in the direction of arrow A as shown in FIG. The bar 20 of the knob 19 moves in the direction of arrow B, and the tip of the bar 20 is moved to one end a of the first link 21.
push. The link 21 rotates counterclockwise (in the direction of arrow C) in the figure around the pivot pin 22 and the other end b
Pushes one end C of the second link 23. The link 23 rotates clockwise (in the direction of arrow d) about the pivot pin 24 against the spring force of the spring member 30. Since the hook 25 of the link 23 is detached from the slot 26 of the base shaft 18, the rear pedal 17 is moved about the rear shaft 1 around the base shaft 18.
7, the rear end side descends in the direction of arrow E. Therefore, when the depressing operation of the front pedal 16 is performed, the rear pedal 17
Since the rear end of the pedal descends, the rear part of the pedal does not push up the heel of the foot unlike the related art, and a stable and normal forward depressing operation can be performed.

When the excavator travels, the front pedal 16 is often used for forward travel, and when the excavator travels backward, the rear pedal 17 is hardly used. When the vehicle is moving backward, it is necessary to visually check the rear side. Therefore, the traveling lever 14L is manually operated. However, although the operation frequency of the rear pedal 17 is low, the driver must depress the rear pedal 17 with his / her feet when performing other driving operations with both hands. At this time, the rear end of the rear pedal 17 whose rear end is inclined downward is rotated so as to be lifted upward. Built-in spring 30
Since the hook portion 25 of the link 23 is urged in the direction of the base shaft 18 by the spring force, the hook portion 25 can be easily fitted into the slot 26. Therefore, the rear pedal 17 can be locked with respect to the lever base end fitting 15, and the rear pedal 17 can be depressed.

FIG. 8 is a plan view, partially cut away, of a traveling lever device 13 'according to a second embodiment of the present invention. In the figure, components using the same components as the traveling lever device 13 of claim 1 are given the same reference numerals. This claim 2
In the traveling lever device 13 ', the lever base end fitting 15'
The lever base end fitting 1 is provided so that the rear end side of the rear pedal 17 'is flipped up and biased about the base shaft 18'.
Spring member 3 acting over 5 'and rear pedal 17'
1 is provided on the base shaft 18 '. When the knob 19 is pressed during the depression operation of the front pedal 16, the rear pedal 17 ′ is released from the locked state, but is thereafter supported by the spring member 31. Then, when the operation of the front pedal 16 is returned to neutral, the rear pedal is automatically flipped up and rotated by the urging force of the spring member 31. Rear pedal 1
The link 2 is inserted into the slot 26 formed on the base shaft 18 'of 7'.
3 and the rear pedal 17 'is automatically returned to the locked state, so that the rear pedal 17' can be depressed whenever necessary and the vehicle can be moved backward.

[0012]

According to the traveling lever device of the prior art, since the side view of the pedal is formed in a V-shape, when the front part of the pedal is depressed by the front part of the foot, the rear part of the pedal pushes the heel of the foot. I started to raise my feet and my legs were tired. Ergonomically, it is better to perform the forward stepping operation while stabilizing the heel of the foot, but this has not been possible. However, in the traveling lever device of the present invention, the front pedal is attached to the lever base end fitting, and the rear pedal is attached to the lever base end fitting so as to be rotatable in the front-rear direction about its base axis. A knob that can be pressed is provided on the upper surface of the pedal, and a slot is formed in the base shaft of the rear pedal, so that when the knob is not pressed, the rear pedal is locked to the lever base end fitting, and the front The locked state of the rear pedal is released by pressing the knob when the pedal is depressed. Accordingly, when the front pedal is depressed, the rear end of the rear pedal descends, so that the rear of the pedal does not push up the heel of the foot as in the related art, and a stable normal front depressing operation is performed. be able to. That is, the traveling lever device of the present invention is ergonomically rational and can reduce foot fatigue during pedal operation. Also, in the traveling lever device in which the rear end of the rear pedal is flipped up and urged against the lever base end fitting, when the operation of the front pedal is returned to neutral, the rear pedal is automatically biased by the urging force of the spring member. A flip-up rotation is performed. That is, the rear pedal automatically returns to the locked state,
This is convenient because you can depress the rear pedal whenever necessary to move backward.

[Brief description of the drawings]

FIG. 1 is a side view showing a structure of a traveling lever device according to a first embodiment of the present invention;

FIG. 2 is a diagram viewed from AA in FIG. 1;

FIG. 3 is a perspective view of a knob in FIG.

FIG. 4 is a perspective view of a first link in FIG. 1;

FIG. 5 is a perspective view of a second link in FIG. 1;

FIG. 6 is a perspective view of a rear pedal in FIG. 1;

FIG. 7 is a side view showing a state when a front pedal of the traveling lever device in FIG. 1 is depressed.

FIG. 8 is a partially cutaway plan view of a main part of the traveling lever device according to a second embodiment of the present invention;

FIG. 9 is a perspective view of a main part showing the inside of a cab for a hydraulic shovel.

FIG. 10 is a partially cutaway side view of the traveling lever device of the prior art.

[Explanation of symbols]

 6,13,13 'Traveling lever device 7L, 7R, 14L Traveling lever 10,15,15' Lever base end fitting 16 Front pedal 17,17 'Rear pedal 18,18' Base shaft 19 Knob 20 Bar 21,23 Link 25 Hook part 26 Slot part 29,30,31 Spring member

Claims (2)

(57) [Scope of request for utility model registration] 1. A traveling lever device for a construction machine in which a pedal for a stepping operation is provided on a traveling lever for manual operation, wherein a front pedal is attached to a lever base end fitting, and a rear part is attached to the lever base end fitting. The pedal is mounted rotatably in the front-rear direction around its base shaft, a knob that can be pressed is provided on the upper surface of the front pedal, and a slot is formed in the base shaft of the rear pedal, and the knob is not pressed. Sometimes, via the bar and link of the knob, the hook of the link is fitted into the slot to lock the rear pedal so that it can be depressed, and the knob is pressed when the front pedal is depressed. By doing so, the hook portion of the link with respect to the slot portion is released,
A travel lever device for a construction machine, wherein the locked state of a rear pedal is released. 2. The travel lever device for a construction machine according to claim 1, wherein the rear end portion of the rear pedal and the rear portion of the rear pedal are urged upwardly about the base shaft against the lever base end portion. A travel lever device for a construction machine, wherein a spring member acting over a pedal is provided on a base shaft.