JPH08339234A - Traveling pedal device for construction machine - Google Patents

Abstract

PURPOSE: To secure a foot space for an operator and to improve the operability and workability of the pedal device. CONSTITUTION: A pedal main body 12 of a traveling pedal device 8 is provided with a 1st rail 14. A remote control valve mechanism 13 is provided with a 2nd rail 17, so that the rail 17 is engaged with the rail 14 and can freely move back and forth. At the same time, time rail 14 is provided with a lock lever 18 and a lock pawl. Then the rail 17 is provided with a lock groove. In such a constitution, a lock means can lock the movement of the rail 14 to the rail 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling pedal device for construction machines such as hydraulic excavators.

[0002]

BACKGROUND OF THE INVENTION Generally,
Construction equipment such as hydraulic excavators has been devised in various ways to make it easier for the operator to work.One such thing is to configure the driver's seat so that it can be moved back and forth. It is designed so that the position can be adjusted back and forth according to the body size difference of the operator and deep digging-shallow digging work. Even if the driver's seat is moved and adjusted in the front-rear direction, it may be difficult to adjust the travel pedal arranged in front of the driver's seat and the operator's stepping position to the optimum state, resulting in poor workability. When the driver's seat position is moved forward to secure a good deep field of view, especially when performing deep digging work, when the running pedal position approaches the driver's seat moved forward and the foot space becomes narrow. Therefore, workability is not always good.

[0003]

SUMMARY OF THE INVENTION The present invention was devised with the object of providing a traveling pedal device in a construction machine capable of eliminating these problems in view of the above-mentioned circumstances. One aspect of the present invention is to construct a hydraulic excavator or the like provided in front of a driver's seat with a traveling pedal device configured by using a remote control valve that performs switching control of a traveling control hydraulic valve based on depression of a pedal body. In the machine, the pedal body is provided so as to be movable in the front-rear direction via a movement adjusting mechanism. A second invention is a hydraulic excavator or the like provided with a traveling pedal device configured in front of a driver's seat using a remote control valve that controls switching of a traveling control hydraulic valve based on depression of a pedal body. In the construction machine, the traveling pedal device is provided so as to be movable in the front-rear direction via a movement adjusting mechanism.

With this construction, the present invention secures a wider foot space for the operator and facilitates the setting of the optimum operating position.

[0005]

Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a hydraulic excavator, which is a crawler-type lower traveling body 2, an upper revolving body 3 rotatably supported on an upper portion of the lower traveling body 2,
A boom 4 and an arm 5 projecting from the front end of the upper swing body 3
Each of these parts is hydraulically actuated by the power of an engine (not shown) mounted on the rear part of the upper revolving superstructure 3, and these basic structures are Is also the same as before.

Reference numeral 6 denotes a cab that covers the driver's seat 1a of the hydraulic excavator 1 and an operating space. Inside the cab 6,
Left and right traveling levers 7R, 7L and traveling pedal device 8 for performing traveling operation of the lower traveling body 2, left and right control levers 9R, 9L for performing pivoting operation of the upper swinging body 3, boom 4, and arm 5. Although various operating devices such as the monitor panel 11 are provided in addition to various hydraulic operating tools such as the above, the present invention is implemented in the traveling pedal device 8 and will be described in detail below.

The traveling pedal device 8 provided in front of the driver's seat 1a includes a pedal rubber 12a and a pedal frame 1.
The pedal main body 12 is made of a member such as 2b and is depressed forward and backward, and the remote control valve mechanism 13 is provided with a travel control hydraulic valve which is switch-controlled based on the depression of the pedal main body 12. However, the first rail 14 is fixed to the lower surface of the pedal frame 12b. On the other hand, in the remote control valve mechanism 13, the mounting bracket (upper lid) 13b integrally fixed to the valve casing 15 is bolted to the cab floor 1.
6, the movable member 13d is swingably supported on the upper surface of the mounting bracket 13b via a laterally-oriented support shaft 13c. A second rail 17 engaged with the first rail 14 such that the first rail 14 is movable in the front-rear direction is integrally attached to the upper surface of the movable member 13d, whereby the pedal main body 12 has a remote control valve mechanism 13. The front and rear movements are adjustable while the front and rear can be depressed.

Reference numeral 18 denotes a lock lever. The lock lever 18 is pivotally supported by a support portion 14a provided on the first rail 14 so as to be swingable in an axial direction.
A lock claw 18a is integrally provided at the base end of the.
When the lock lever 18 is operated to the release position, the lock claw 18a that penetrates the first rail 14 and faces the second rail 17 side is formed with the locking groove 1 formed in the second rail 17.
7a, the pedal body 12 can be moved back and forth. However, when the pedal body 12 is operated to the lock position, the lock claw 18a is locked in an arbitrary locking groove 17a and the pedal body 12 is moved.
The forward and backward movement of the is set to be locked. still,
In the figure, 19 is a valve spool of the remote control valve mechanism 13, 20 is a push rod that is connected to the front / rear step of the pedal body 12 and appears and disappears, and 21 is the push rod 2.
Reference numeral 0 is a return ammunition, and 22 is a valve spool 19 ammunition.

In the embodiment of the present invention constructed as described above, for example, when performing deep digging work, when the driver's seat 1a is moved forward to secure the front view, the operator's foot space becomes narrow. In this case, if necessary, with the lock lever 18 in the release posture,
Move the pedal body 12 forward and backward to adjust the lock lever 18
Should be in a locked position, and by doing so, it is possible to perform deep digging work in a state where the foot space is wide. Moreover, the pedal body 12 can be locked at an appropriate position by setting the lock lever 18 in the lock posture, and does not move inadvertently back and forth.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but in the above-mentioned embodiment, the pedal body 12 is moved back and forth with respect to the remote control valve mechanism 13, but the remote The control valve mechanism 13 can also be configured to move and adjust.
That is, in the second embodiment shown in FIGS. 6 and 7, the mounting brackets 13b of the left and right traveling pedal devices 8 are integrally fixed to the movable plate 23 and the movable plate 2
The first rail 14 provided on the No. 3 is attached to the second rail 17 provided on the cab floor 16 so as to be movable in the front-rear direction. In addition to the advantage that the left and right traveling pedal devices 8 can be moved and adjusted at the same time, the remote control valve mechanism 13 moves integrally with the pedal body 12, so that the pedal operation feeling of the pedal body 12 can be adjusted forward and backward. Even if it does not change, there is also an advantage. Of course, in the case where the traveling pedal device of the second embodiment is adjusted to move forward and backward, the left and right ones may be individually moved.

[0011]

In summary, since the present invention is constructed as described above, the foot space is narrowed by moving the driver's seat forward in order to secure a front view when performing deep digging work or the like. In this case, it may be necessary to move and adjust the pedal body forward according to the operator's foot position, which allows work to be performed with a more appropriate foot space corresponding to the work situation and the physique of the operator. Operability and workability are further improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a hydraulic excavator.

FIG. 2 is a perspective view of a cab.

FIG. 3 is a partial cross-sectional side view of a traveling pedal device.

FIG. 4 is a front view of a traveling pedal device.

FIG. 5 is an explanatory cross-sectional view of essential parts showing a locking means of the traveling pedal device.

FIG. 6 is a side view showing a second embodiment.

FIG. 7 is a front view showing a second embodiment.

[Explanation of symbols]

 8 Travel Pedal Device 12 Pedal Main Body 13 Remote Control Valve Mechanism 13b Mounting Bracket 13c Spindle 13d Movable Member 14 First Rail 17 Second Rail 17a Locking Groove 18 Lock Lever 18a Lock Claw

Claims (6)

[Claims] 1. A construction of a hydraulic excavator or the like provided in front of a driver's seat with a traveling pedal device configured by using a remote control valve for performing switching control of a traveling control hydraulic valve based on depression of a pedal body. In the machine, a travel pedal device in a construction machine, wherein the pedal body is provided so as to be movable in the front-rear direction via a movement adjusting mechanism. 2. The running machine according to claim 1, wherein the remote control valve is fixed to the machine body side, and the movement adjusting mechanism is provided between the pedal body and the remote control valve mechanism. Pedal device. 3. The movement adjusting mechanism according to claim 2, wherein the first rail provided on the pedal body and the second rail provided on the remote control valve mechanism so as to be movably engaged with the first rail. A traveling pedal device in a construction machine, comprising: a locking means capable of locking the movement of the first rail with respect to the second rail. 4. A hydraulic excavator or the like provided with a traveling pedal device configured in front of a driver's seat using a remote control valve for performing switching control of a traveling control hydraulic valve based on depression of a pedal body. In the machine, the traveling pedal device in a construction machine, wherein the traveling pedal device is provided so as to be movable in the front-rear direction via a movement adjusting mechanism. 5. The movement adjusting mechanism according to claim 4, wherein the movement adjusting mechanism includes a first rail provided on the body main body side and a second rail provided on the traveling pedal device so as to be movably engaged with the first rail. A traveling pedal device in a construction machine, comprising: a locking means capable of locking the movement of the first rail with respect to the second rail. 6. The traveling pedal device for a construction machine according to claim 5, wherein the second rail is provided on a support member to which the left and right traveling pedal devices are integrally attached.