JPS6224292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a greasing device for a box hoisting mechanism in a dump truck.

Conventionally, as a mechanism for raising and lowering the cargo box of a dump truck, for example, as shown in FIG. A lift arm 4 whose one end is pivotally supported on the subframe 2, a tension bar 5 rotatably supported by the other end of the lift arm 4, and a Some cylinders 6 for raising and lowering the cargo box 3 are provided, and the other ends of these cylinders are rotatably attached to the main girder 7 on the lower surface of the cargo box 3.

The lifting cylinder 6 is located at the center of the vehicle body in the left-right direction, and is used to tilt the cargo box 3 with respect to the subframe 2 as shown by the imaginary line in the figure. It is located on the left and right side of the cylinder 6,
It constitutes a link mechanism that allows the push-up operation to be performed smoothly.

In addition, wooden supports 8 are mounted and fixed on the left and right ends of the sub-frame 2 to provide a buffer between the main girder 7 and the sub-frame 2 when the cargo box 3 is lowered to a horizontal state. It is.

In the above-mentioned cargo box hoisting mechanism, when supplying lubricating oil such as grease to the tip shaft supports 5a and 5b of the tension bar 5, the worker tilts the cargo box 3 as shown and then lifts it onto the subframe 2. Grease is applied directly with a grease gun, etc.

However, if another worker accidentally operates the lifting mechanism and lowers the cargo box while working on the bottom surface of the cargo box, the worker may be at risk, which is a serious drawback in terms of human life.

The present invention has been made to solve the above-mentioned problems, and allows the worker to refuel safely from the ground on the vehicle side without having to be under the cargo box and be exposed to danger. It is an object of the present invention to provide a greasing device for a cargo box hoisting mechanism in a dump truck that can perform the following operations.

The feature is that a part of the tension bar is provided with a greasing port mounting base, and a part of the buffer bracket corresponding to this greasing port mounting base is provided with a notch, and both ends of the tension bar are connected to each other. Connect the greasing pipe connected to the shaft support of the lift arm and the lower surface of the cargo box to the greasing port attached to the greasing port mounting base, and when the cargo box is in a horizontal position on the vehicle body, The present invention provides a greasing device for a cargo box raising/lowering mechanism that can remotely supply grease to a desired shaft support from a notch in a receiving tree.

The present invention will be described in detail below based on examples thereof.

FIG. 2 shows an embodiment of the greasing device for the cargo box hoisting mechanism in the dump truck of the present invention. Lift arms 4 whose one end is pivotally supported on the sub-frame 2 are located on the left and right sides of the undulating cylinder 6 mounted on the center line in the left-right direction of the vehicle body, and a tension bar 5 and the undulating cylinder 6 are attached to the other end. It is rotatably supported, and each other end thereof is rotatably attached to the main girder 7 on the lower surface of the cargo box 3, as shown in FIG.

The shaft supports 5a and 5b of the tension bar 5 have a greasing part 10 as shown in FIG. An extended greasing pipe 11 for supplying grease and the like is connected. The greasing port 12 is, for example, a grease nipple or the like, and the greasing port mounting base 1 is fixed to the lower surface of, for example, a U-shaped bracket 13 with its tip directed toward the outside of the vehicle body.
4 and is secured to the tension bar 5 with bolts 16 together with another bracket 15 as shown in FIGS. 4 and 5.

If there are two or more locations that require greasing, a plurality of greasing ports 12 may be provided on one greasing port mounting base 14 as shown in FIGS. 2 and 3.

On the other hand, the tension bar 5 is located in the middle of the buffer support 8 mounted and fixed on the subframe 2.
is substantially horizontal as shown in FIG.
7 is provided.

Since the present invention is configured as described above, it is possible to remotely refuel from the vehicle side in the following manner.

First, with the cargo box 3 in a horizontal position as shown in Fig. 2, a worker stands on the side of the car holding a grease gun, and attaches the buffer support between the sub-frame 2 and the main girder 7 as shown in Fig. 4. A grease gun is inserted through the notch 17 of 8, and grease is injected through the greasing port 12.

Grease is supplied to the greasing section 10 of the shaft support 5a or 5b through a greasing pipe 11 arranged along the tension bar 5.

Therefore, the greasing work can be carried out safely and remotely from the ground on the vehicle side, without the operator being exposed to danger on the vehicle body under the cargo box 3.

As described in detail above, the present invention provides a greasing port mounting base in a part of the tension bar and a notch part in a part of the buffer bracket corresponding to the greasing port mounting base, so that the tension bar Since the greasing pipe connected to the tip of the lift arm and the shaft support of the lower surface of the cargo box is connected to the greasing port attached to the greasing port mounting base, the cargo box is in a horizontal state on the vehicle body. At this time, a grease gun can be inserted from the notch of the buffer receiver on the ground on the vehicle side to remotely and safely supply grease to the shaft support of the tension bar.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a box hoisting mechanism in a conventional dump truck, FIG. 2 is a diagram of the incorporation of a greasing device in the box hoisting mechanism in a dump truck of the present invention, and FIG. 3 is an arrow indicated by the - line in FIG. FIG. 4 is a view taken along the - line in FIG. 3, and FIG. 5 is a view taken along the - line in FIG. 3... Loading box, 4... Lift arm, 5... Tension bar, 5a, 5b... Axial support, 6... Luffing cylinder, 8... Buffer bracket, 11... Greasing pipe, 12... Greasing port, 14... Greasing port mounting stand,
17...Notch part.

Claims (1)

[Claims] 1. A lift arm rotatably supported between a vehicle body and a tiltable cargo box mounted thereon, and a cargo box installed between the lift arm and the cargo box. In a dump truck having a cargo box hoisting mechanism having a hoisting cylinder and a tension bar, and buffer supports mounted and fixed on the left and right sides of the vehicle body, a greasing port mounting stand is provided on a part of the tension bar, and this A notch is provided in a part of the buffer bracket corresponding to the greasing port mounting base, and the greasing pipe connected to the shaft support of both ends of the tension bar and the lift arm and the bottom surface of the cargo box is connected to the greasing port mounting base. It is connected to the greasing port attached to the greasing port mounting base, and when the cargo box is in a horizontal position on the vehicle body, remotely feeds the oil from the notch of the buffer support tree to the shaft support of the tension bar on the vehicle side. A lubrication device for a cargo box hoisting mechanism in a dump truck, characterized by being able to lubricate.