JPS629071B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lubricating device for a box lifting mechanism in a dump truck, which allows the shaft support of the box lifting mechanism to be lubricated from a remote location.

Generally, in a dump truck, a cargo box lifting mechanism is installed between the chassis frame and the cargo box, which is composed of a lift arm, a tension bar, and a hydraulic cylinder. ing.

By the way, when the box lifting mechanism is in operation, the shaft support between the lift arm and the hydraulic cylinder rotates relative to each other, resulting in significant wear.To prevent this, the shaft support must be periodically lubricated. There is.

The conventional greasing method is to first operate the box lifting mechanism to tilt the cargo box to a predetermined angle, and in this state, the operator enters between the cargo box and the chassis frame and lubricates the shaft support directly with a grease gun. are doing.

However, if another worker accidentally activates the box lifting mechanism and lowers the box during the work, there is a risk of personal injury.

The present invention solves the above problem, and examples of the present invention will be described below.

In FIG. 1, 1 is a chassis frame, 2 is a subframe, and 3 is a cargo box mounted on the subframe 2, which is pivotably supported 4 on the rear end of the subframe 2 so as to be tiltable backwards. In the traveling posture in which the main girder 5 of the cargo box 3 is in a horizontal state, the lower surface of the main girder 5 of the cargo box 3 is joined to the upper surface of the buffer bracket 6 provided on the upper surface of the subframe 2. Reference numeral 7 denotes a cargo box lifting mechanism interposed between the front of the subframe 2 and the front of the cargo box 3. This cargo box lifting mechanism 7 is composed of a triangular lift arm 8, a tension bar 9, and a hydraulic cylinder 10. One corner of the arm 8 is pivotally supported 11 on the subframe 2, and the tension bar 9 has one end pivotally supported 11 on the other corner of the lift arm 8.
2, and the other end is pivoted 13 to the packing box 3. The hydraulic cylinder 10 has one end connected to the lift arm 8.
The other end is pivoted 14 to the remaining corner of the box 3, and the other end is pivoted 15 to the cargo box 3, and the tension bar 9 and hydraulic cylinder 1 are
It is installed so that it intersects with 0 when viewed from the side.

Next, the main parts of the present invention will be explained. Reference numeral 16 indicates a square-shaped greasing port mounting base that is fixed to the side surface of the lift arm 8 and whose tip portion projects horizontally outward. is attached so as to correspond to the partial notch 17 of the buffer support 6 when the packing box 3 is in a running position with it horizontally fixed on the upper surface of the buffer support 6, and the tip of the mounting base 16 is attached to the support. It matches the outer surface of tree 6.

A greasing port 18 such as a grease nipple is attached to the front end surface of the mounting base 16 so as to face the side of the chassis frame 1.
Greasing pipe 20 provided along the side of lift arm 8
It also communicates with the greasing section 22 of the shaft support 14 via a guide hole 21 in the shaft support 14 .

In the present invention, with the above configuration, when the cargo box 3 is now in the running position, the greasing port mounting base 16 is attached to the buffer bracket 6.
The greasing port 18 is exposed on the side surface corresponding to the notch 17 .

In the above state, when the worker stands on the side of the car and injects grease into the greasing port 18 with a grease gun, the grease passes through the guide hole 19, the grease pipe 20 along the lift arm 8, and the guide hole 21, and then reaches the lift arm 8 and the hydraulic pressure. It is supplied to the greasing section 22 of the shaft support 14 with the cylinder 10.

Therefore, the operator can safely perform greasing work without entering the underside of the cargo box 3.

As described above, the present invention provides a notch in a part of the buffer bracket, a greasing port mounting base in a part of the lift arm, and a greasing port mounting base in a traveling position where the cargo box is horizontal. Since it is made to correspond to the notch of the buffer bracket, it is possible to safely supply grease to the greasing section.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a dump truck, Fig. 2 is a cross-sectional view showing a cargo box lifting mechanism equipped with a greasing device of the present invention, Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 2, and Fig. 4 is a cross-sectional view of a dump truck. FIG. 5 is a partial side view showing the greasing port mount, and FIG. 5 is a sectional view taken along line BB in FIG. 2. 1 is a chassis frame, 3 is a loading box, 6 is a buffer bracket, 7 is a loading box lifting mechanism, 8 is a lift arm, 10
14 is a hydraulic cylinder, 14 is a shaft support, 16 is a greasing port mounting base, 17 is a notch, and 18 is a greasing port.

Claims (1)

[Claims] 1. A cargo box lifting mechanism consisting of at least a lift arm and a hydraulic cylinder that operates the lift arm is interposed between the chassis frame and the cargo box tiltably mounted on the chassis frame, and the chassis frame side In a dump truck that is provided with a buffer bracket to which the lower surface of the cargo box is connected to the upper surface, a cutout is provided in a part of the buffer bracket, and a greasing port mounting base is provided in a part of the lift arm. At the same time, the greasing port of this mounting base and the shaft support of the lift arm and the hydraulic cylinder are connected by a greasing pipe, and when the cargo box is horizontally fixed on the upper surface of the chassis frame, the greasing port is connected to the shaft portion of the lift arm and the hydraulic cylinder. A greasing device for a cargo box lifting mechanism in a dump truck, the opening of which is adapted to correspond to the notch of the buffer support.