JPH0110973Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a mounting structure for a posture detection device of a ground-based working machine that is attached to a traveling machine body so that it can be driven up and down and tilted left and right.

The purpose of this invention is to provide a mounting structure for a posture detecting device of a ground-based work machine, in which the posture detecting device is not easily affected by vibration and can be easily installed and readjusted.

In order to achieve this object, this invention provides a bracket 9 having a mounting base 7 at the rear of the top mast 5 of the ground work machine 3, which is attached to the traveling machine body 1 so as to be capable of being driven up and down and tilted left and right.
On the mounting base 7, an attitude detection device 11 which detects the left and right inclination of the ground work machine 3 and issues an attitude control command is supported on both left and right sides thereof so that the vertical position can be adjusted separately.

Hereinafter, one embodiment of this invention will be described in detail based on the accompanying drawings.

As shown in FIG. 1, at the rear of the traveling aircraft 1,
The ground working machine 3 is supported by a top link 13 and left and right lower links 15 pivotally connected to the traveling body 1 by left and right pins 2. top link 13
is pivotally attached to the top link mast 15 of the ground work machine 3. Above the left and right lower links 15, left and right lift arms 17 are supported via a lift shaft 19 so as to be movable up and down with respect to the traveling body 1. Between the lift arm 17 and the lower link 15, left and right lift rods 21a and 21b are provided in the vertical direction, which are pivotally connected to both. Therefore, if the lift arm 17 is moved up and down by a hydraulic device (not shown), the ground work machine 3 is moved through the top link mast 13 and the lower link 15.
can be raised and lowered. Said left and right lift rods 21
A telescopic mechanism 23 is interposed in one of the lift rods 21a and 21b. This telescopic mechanism 23 is composed of a hydraulic cylinder device, and by switching a switching valve 25 connected between a hydraulic supply/discharge device (not shown) and the telescopic mechanism 23, the length of the lift rod 21a can be contracted. The ground working machine 3 can be tilted left and right with respect to the traveling body 1. Note that it is desirable to use a ball joint for the pivoting portion between the rear portions of the left and right lower links 15 and the ground work equipment 3.

A bracket 9 is attached to the rear of the top mast 5 of the ground work machine 3. This bracket 9, as shown in FIGS. 2 and 3,
It is formed of a plate-like member and has a substantially horizontal mounting base 7 with its longitudinal direction oriented left and right. Both left and right ends of the mounting base 7 are formed with left and right side walls 9a that rise substantially vertically. Left and right side wall portions 9a
The upper part of the top link mast 5 is formed to be inclined in the longitudinal direction of the top link mast 5, and is formed to gradually approach the width direction of the top link mast 5. A support portion 9b is formed along the widthwise outer side of the top link mast 5 at the upper end of the left and right side wall portions 9a close to the top link mast 5, and the support portion 9b is connected to the fastener 26.
It is removably fastened to the top link mast 5 via. An engaging piece 9c is provided at the edge of the support portion 9b to engage with the edge of the top link mast 5 to stabilize the fixation of the bracket 9.

A plate-shaped base member 27 with downwardly sloped front and rear edges is mounted on the mounting base 7. The base member 27 is attached to bolts 29 that pass through the mounting base 27 and the base member 27 from below as shown in FIG.
7 is fixed by tightening a fixing nut 31 from above. The left and right bolts 29 support the left and right sides of the posture detection device 11 so that their vertical positions can be adjusted separately. That is, the attitude detection device 1
1 is provided with a mounting plate 33 extending to the left and right sides, and the left and right mounting plates 33 are loosely fitted to the left and right bolts 29. The left and right mounting plates 33 are fixed by horizontal adjustment nuts 35 screwed into bolts 29 at the top and bottom of the mounting plate 33. Posture detection device 11
For example, a bubble switch consists of a glass tube filled with water with air bubbles trapped in it, and the presence or absence of the air bubbles is detected by the amount of light transmitted from the left and right light sources to short-circuit either the left or right contact. ,
Each contact is electrically connected to the switching valve 25.
Therefore, the attitude detection device 11 detects the left and right inclination of the ground work machine 3 and issues an attitude control command.

Next, the bracket 9 can be attached or detached by removing or tightening the fastener 26. To horizontally adjust the posture detection device 11, loosen the left or right horizontal adjustment nut 35, move the left or right side of the mounting plate 33 up and down separately, and then tighten the horizontal adjustment nut 35 when the posture detection device 11 is horizontal. to fix the mounting plate 33.

For attitude control, when the ground work machine 3 along with the traveling body 1 tends to move to the left, for example, the left contact of the attitude detection device 11 is short-circuited, and a control command is issued to the switching valve 25. The switching valve 25 is switched from the neutral position, and the telescopic mechanism 2 is connected to the hydraulic supply/discharge device (not shown).
Hydraulic oil is supplied to the contraction side of 3, and the expansion and contraction mechanism 23,
In other words, the lift rod 21a is retracted and the ground work machine 3 is maintained in a substantially horizontal position. Similarly, when the ground work equipment 3 is about to tilt to the right, the lift rod 21a is extended to maintain a substantially horizontal attitude.

Although the ground work equipment 3 vibrates during such work, the top link mast 5 is a place where there is relatively little vibration, and the attitude detection device 11 is not affected by the vibration much, and malfunctions are unlikely to occur. few. Further, even if stones or the like are scattered during work, the posture detection device 11 is protected by the side wall portion 9a and is less likely to be damaged.

According to the configuration of this invention, the attitude detection device is supported by the bracket provided at the rear of the toplink mast, so the toplink mast is a part of the ground work machine that experiences less vibration. Malfunctions are less likely to occur.
Since the rear part of the toplink mast is located relatively high in the ground work machine and is exposed, it is possible to easily attach the bracket. Since the left and right sides of the posture detection device are supported on the mounting base of the bracket, which is located in such an easy-to-install location, so that the vertical position can be adjusted separately, it is possible to readjust the horizontal adjustment of the posture detection device relatively easily. be.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a mounting structure for a posture detection device of a ground-based work machine according to an embodiment of the invention, Fig. 2 is an enlarged perspective view, and Fig. 3 is a perspective view showing a horizontal adjustment mechanism of the posture detection device. be. DESCRIPTION OF SYMBOLS 1... Traveling body, 3... Ground work machine, 5... Top link mast, 7... Mounting base, 9... Bracket, 11... Attitude detection device.

Claims (1)

[Scope of utility model registration request] A bracket having a mounting base is provided at the rear of the top mast of the ground work equipment which is attached to the traveling body so that it can be driven up and down and can be driven to tilt left and right, and the mounting base detects the left and right tilt of the ground work equipment to control the attitude. A mounting structure for a posture detection device for a ground-based work machine, characterized in that the posture detection device that issues a command is supported on both left and right sides so that the vertical position can be adjusted separately.