JPH0712555U - Control equipment for construction machinery - Google Patents

Abstract

(57) [Abstract] [Purpose] When adjusting the tilt of the control box in the conventional control device, the driver holds the control box by hand while unlocking the mechanical lock by pressing the knob with fingers. Had to be done manually. The control box was quite large, and it was especially troublesome to return the control box to the rear end flip-up position when getting off. This problem is solved. [Structure] In the control device of the present invention, an electric motor with a reduction gear is fixedly arranged on a fixed portion of the vehicle body behind the driver's seat, and left and right driven shafts are rotatably arranged.
The driven shaft is driven by the electric motor, and the left and right levers are fixed to the driven shaft, and the tip ends of the left and right levers and the respective one ends of the left and right control boxes are connected via links. And configured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work control device installed near a driver's seat of a construction machine such as a hydraulic excavator or a work vehicle.

[0002]

[Prior art]

 FIG. 5 is a perspective view of an essential part showing the inside of a cab of a hydraulic excavator (not shown) equipped with a conventional control device. In the figure, 1 is a floor board of a driver's cab, 2 is a driver's seat, 3 L and 3 R are control boxes provided on the left and right sides of the driver's seat 2, 4 L and 4 R are for work provided on control boxes 3 L and 3 R, respectively This is the operation lever. FIG. 6 is a side view of a notched main portion showing the control bockle 3L in FIG. In the figure, 5 is a bracket fixed to the floor plate 1, 6 is a push-type knob, 7 is a mechanical lock tool, and 8 is a push-pull cable.

In the conventional control device, as shown in FIGS. 5 and 6, the control box 3 L (3 L of the left and right control boxes 3 L and 3 R will be described as a typical example) is a bracket fixed to the floor plate 1. It is attached so as to be tiltable in the front-back direction with respect to 5. An arm 9 is provided below the control box 3L integrally with the control box 3L, and a mechanical lock 7 is provided between the arm 9 and a bracket 10 standing on the floor plate. On the other hand, the knob 6 is provided above the control box (3L) near the operation lever 4L. Then, the knob 6 and the mechanical lock 7 are connected by a push bar 11 and a push-pull cable 8 to form a structure.

Next, the tilt adjustment of the control box 3L will be described. When the knob 6 is pushed, the pushing force acts on the mechanical lock 7 through the push bar 11 and the push-pull cable 8, and the locking operation of the mechanical lock 7 is released. Therefore, if the knob 6 is kept pressed, the control box 3L can be manually tilted within the range of the angle α from the rear end flip-up position B. When the driver tilts the control box 3L to the desired position angle and removes the finger from the knob 6, the knob 6 returns to its original position and the mechanical lock 7 is in the locked state. The position angle can be fixed.

[0005]

[Problems to be solved by the device]

 In the prior art control device, when adjusting the tilt of the control box, the driver must manually hold the control box while manually holding the knob while manually unlocking the mechanical lock. There wasn't. The control box is quite large, and the operation of returning the control box to the rear end flip-up position when getting off was troublesome and labor-intensive. It is conceivable that the control box can be tilted hydraulically, but since hydraulic equipment and hydraulic piping must be placed in that hydraulic circuit, it required a considerable amount of space, a complicated structure, and was expensive to manufacture. The present invention aims to solve the above problems.

[0006]

[Means for Solving the Problems]

 In the control device of the present invention, a control box equipped with an operating lever for a working machine is tiltable in the front-rear direction. A control box is attached to the horizontal axis of the frame in the left-right direction so as to be rotatable in the front-rear direction, and an electric motor with a reduction gear is fixed to the fixed part of the vehicle body behind the driver's seat. A driven shaft in the horizontal direction is rotatably arranged so that the driven shaft can be driven by the electric motor, and left and right levers are fixed to the driven shaft. By connecting each end of the left and right control boxes via a link and operating the electric motor by a switch operation, the control box is centered on the horizontal axis. It was to be dynamic adjustment.

[0007]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an essential part of the control device of the present invention as seen obliquely from the rear. In the figure, 12 is a floor plate inside the driver's cab, 13 is an underframe that is provided below the driver's seat (the driver's seat is not shown in FIG. 1), and is fixed to the floor plate 12, and 14 is an underframe. Horizontal shafts fixed to the left and right with respect to 13 are horizontal control shafts, 15L and 15R are a pair of left and right control boxes mounted to the horizontal shaft 14 so as to be rotatable in the front-rear direction, and 16L and 16R are control boxes. 15L and 15R operation levers, 17 is an electric motor fixed to the floor plate 12 with a speed reducer, 18 is a drive shaft of the electric motor 17, 19 is a drive lever fitted to the drive shaft 18, and 20 is a transmission. Links 21 are driven shafts, 22 are transmission link connecting levers fixed to the driven shaft 21, 23L and 23R are levers fixed to the left and right sides of the driven shaft 21, 24L and 24R are left and right links, and 25L and 2L. Left and right bearings R is supporting the driven shaft 21 is fixed relative to the floor plate 12, 26, 27, 28, 29 is a pin that is pivotally secured to the respective consolidation unit. FIG. 2 is a front view of the main part viewed from A of FIG. In the figure, 30 (shown by a virtual line) is a driver's seat. FIG. 3 is a side view of the main part viewed from B of FIG. FIG. 4 is a side view in which the control boxes 15L and 15R in FIG. 3 are operated in a rear end flip-up angle state.

Next, the configuration of the control device of the present invention will be described with reference to FIGS. In the present invention, the control boxes 15L and 15R (the control boxes 15L and 15R are paired on the left and right sides) on the horizontal horizontal shaft 14 provided on the underframe 13 under the driver's seat (30) on the upper surface of the floor plate (12). For convenience of explanation, the control boxes 15L and 15R are hereinafter simply referred to as the control box 15L) and are attached so as to be rotatable in the front-rear direction. An electric motor 17 with a reduction gear (not shown) is fixedly arranged on the floor plate 12 behind the driver's seat (30), and left and right driven shafts 21 in the horizontal direction are rotatably arranged. The driven shaft 21 is driven by the electric motor 17 via the transmission link 20, and the left and right levers 23L and 23R are fixed to the driven shaft 21, and the tip portions of the left and right levers 23L and 23R are respectively The left and right control boxes 15L (15R) are connected to the rear portions on the inner surface side via links 24L and 24R, respectively, and a switch (not shown) is operated to operate the electric motor 17, thereby causing the control box 15L to move to the above water. The tilt is adjusted about the flat shaft 14.

Next, the operation of the control device of the present invention will be described. When tilting the control box 15L to a desired position angle, for example, when tilting the control box 15L shown in FIG. 3 rearward from the front end working position b, the electric motor 17 is rotated by a switch operation. Since the drive lever 19 rotates in the counterclockwise direction (the direction of arrow D in FIG. 3) at a low speed in the figure, the transmission link 20 attached to the tip of the drive lever 19 is moved forward. Then, the transmission link 20 rotates the transmission link connecting lever 22 of the driven shaft 21 forward, and at the same time, the driven shaft 21 rotates counterclockwise in the drawing. Since the lever 23L (23R) fixed to the driven shaft 21 rotates in the direction of arrow E, the link 24L (24R) descends. The position of the pin 29, which connects the upper end of the link 24L and the rear part on the inner surface side of the control box 15L, moves downward along a locus of radius R about the axis of the horizontal shaft 14. Therefore, the control box 15L can be tilted rearward about the horizontal axis 14. Then, as shown in FIG. 4, when the drive lever 19 is rotated by the angle θ, the control box 15L reaches the rear end flip-up position C and is fixed, so that the driver can get off the vehicle without any trouble. it can. Next, when it is desired to tilt the control box 15L forward, the electric motor 17 is rotated clockwise in the figure by a switch operation. Since the drive lever 19 rotates in the clockwise direction contrary to the case of the backward tilting operation, the control box 15L can be tilted forward. As described above, the control box 15L can be adjusted to a desired position angle within the angle range (angle range of the angle β shown in FIGS. 3 and 4) extending from the front end working position B to the rear end flipping position C. it can.

In the embodiment of the present invention, the transmission link 20 is used as a means for rotating the driven shaft 21 by the electric motor 17, but the drive shaft 18 of the electric motor 17 is not limited to the link, and the pinion member ( (Not shown) and a wheel member (not shown) may be attached to the driven shaft to transmit power by a gear, a chain, a belt, or the like.

[0011]

[Effect of device]

 In the prior art control device, when adjusting the tilt of the control box, the driver must manually hold the control box while manually holding the knob while manually unlocking the mechanical lock. There wasn't. The control box is quite large, and the operation of returning the control box to the rear end flip-up position when getting off was troublesome and labor-intensive. However, in the control device of the present invention, a control box is rotatably attached in the front-rear direction to the horizontal axis provided in the underframe of the driver's seat, and the deceleration is applied to the fixed part of the vehicle body behind the driver's seat. The electric motor with a machine is fixedly arranged, and the left and right horizontal driven shafts are rotatably arranged so that the driven shaft can be driven by the electric motor. Was fixed, and the tip of each of the left and right levers was connected to one end of each of the left and right control boxes via a link. Thereby, the control box can be tilted and adjusted to a desired angle by operating the electric motor by a switch operation. The tediousness of the driver holding the control box by hand and tilting it manually as in the prior art is eliminated. At the same time, the labor required for tilting the control box can be reduced. This is convenient because it saves labor for the rear end of the control box to flip up and to return to the front end position.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a control device of the present invention as seen obliquely from the rear.

FIG. 2 is a front view of a main part viewed from A of FIG.

FIG. 3 is a side view of a main part viewed from B of FIG.

FIG. 4 is a side view of the control box in FIG. 3 operated in a rear end flip-up angle state.

FIG. 5 is a perspective view of a main part of a conventional control device.

FIG. 6 is a side view of a main part of a notch showing a control box in FIG.

[Explanation of symbols]

 1,12 Floor plate 2,30 Driver's seat 3L, 3R, 15L, 15R Control box 4L, 4R, 16L, 16R Work control lever 13 Underframe 14 Horizontal shaft 17 Electric motor 18 Drive shaft 19 Drive lever 20 Transmission link 21 Driven shaft 22 Transmission Link Connecting Lever 23L, 23R Lever 24L, 24R Link

Claims (1)

[Scope of utility model registration request] 1. A control box equipped with an operating lever for a working machine is provided on a lower frame of a driver's seat in a control device for a construction machine provided near the driver's seat so that the tilt can be adjusted in the front-rear direction. A control box is attached to the horizontal axis in the left-right direction so that it can rotate in the front-rear direction, and an electric motor with a reducer is fixed to the fixed part of the vehicle body behind the driver's seat. It is rotatably arranged so that the driven shaft can be driven by the electric motor, and the left and right levers are fixedly mounted on the driven shaft. The control box is connected to each other via a link, and the electric motor is operated by a switch to adjust the tilt of the control box about the horizontal axis. A control device for a construction machine characterized by the above.