JPS5838332B2 - Dump direction control device for 3-way dump truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dumping direction control device for a three-turn dump truck, which allows a cargo box to be dumped in a desired direction rearward or either side from a remote location.

Conventionally, the hinge structure of this type of three-turn dump truck was
As shown in Fig. 8 and Fig. 8, a spherical male body 02 provided on the vehicle frame side is fitted into a hemispherical female body 01 provided on the cargo box side, and is roughly used to control the dumping direction. This is accomplished by inserting a locking pin 03 into the lower part of the female body 01, which prevents the male body 02 from coming off, so that it can be inserted and removed.

By the way, with the above structure, if the user wants to dump the cargo box in the desired direction on one of both sides, he has to crawl under the bottom of the cargo box and pull out each locking pin each time. Furthermore, when traveling, it is necessary to crawl to the bottom of the cargo box to check whether the locking pin is inserted correctly, which poses a very troublesome operation problem.

In view of the above-mentioned problems, the present invention is designed to allow the engagement and disengagement of the locking pin and the male body to be controlled from an easily accessible remote location such as the operator's cab. This makes it easy to confirm this.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the figure, 1 is the car frame, 2 is the cargo box mounted on the car frame 1, and 3
, 3/, 3// are a plurality of universal hinge parts that removably connect the cargo box 2 and the vehicle frame 1, and 4 is the hinge part 3 interposed approximately in the center between the vehicle frame 1 and the cargo box 2. , 3/, 3
//, 3/// shows a hydraulic cylinder capable of dumping the cargo box 2 in a desired direction, either backward or on both sides.

The universal hinge portion 3, 3', 3'',
3/// have the same structure, so one of the monge parts 3
To explain this with reference to FIGS. 2 and 3, the hinge portion 3 includes a spherical male body 5 provided laterally projecting on the vehicle frame 1, and a spherical male body 5 that is fixed to the lower surface of the cargo box 2 in opposition to the male body 5. , a generally hemispherical female body 6 with the opening facing downward; and a cross section rotatably provided on the thick walled part of the outer lower part of the female body 6 to control fitting and disengagement between the female body 6 and the male body 5. It is composed of a circular locking pin 7.

The locking pin 1 has a substantially central portion exposed inside the female body 6, and an arcuate notch 8 formed at a radius smaller than the radius of the spherical male body 5 on one side of the central portion. When the notched recess 8 of the locking bottle γ faces the spherical surface of the male body 5 as shown by the solid line in FIGS. 2 and 3, the male body 5 fitted in the female body 6 is Can be removed and locking pin 1
When the circular surface of the locking pin γ is opposed to the spherical surface of the male body 5 by rotating approximately 90 degrees, the locking pin γ is rotated approximately 90 degrees.
and the lower surface of the male body 5 are engaged, and this engagement point is located on a line connecting the center of the locking pin 7 and the center of the male body 5. The male body 5 fitted into the female body 6 is prevented from slipping out.

A rotating piece 11 is fixed to the end of the locking pin 1 so that the locking pin 1 can be rotated by an operating lever 9 or 10, which will be described later.

Next, each '-universal hinge part 3, 3', 3'',
The operation system for rotating the respective locking pins l, γ', γ", γ" of 3" will be explained with reference to FIG. 12
, 13 are rotatably provided. This torque shaft 12
, 13 have arms 14, 14' and rod 1.
5 and 15' are connected to the respective operating levers 9 and 10, and arm 16 and 16' rods 1 are connected to the front and rear parts of one of the torque shafts 12.
A rotating piece 11 fixed to the locking pin γ on one front side and a rotating piece fixed to the locking pin γ'' on the other rear side via transmission members such as γ, 11' and bell racks 18, 18'. 1
1'', and at the rear and front portions of the other torque shaft 13 are rotating pieces 11' fixed to a locking pin γ' on one rear side and a rotating piece 11' fixed to a locking pin γ'' on the other front side. It is connected to the rotating piece 11'' via a transmission member similar to that described above.

The relationship between the universal hinge parts 3 and 3'' is such that when one is in an engaged state, the other is in a detachable state, and the relationship with the universal hinges s3' and 3'' is the same as described above.

The present invention has the above structure, and if you want to dump the cargo box 2 rearward, if you tilt the operating lever 9 to the A side and the operating lever 10 to the D side, the front universal hinge part 3
, 3" are rotated as shown in FIGS. 2 and 3, and the male body 5 , 5". The female bodies 6, 6" and the male bodies 5, 5" are in a removable state, respectively, and the rear universal hinge part 3/
, 3/l/ are rotated so that the circular surfaces of the locking pins 7', 7'' are opposed to the spherical surfaces of the male body 5'5'', respectively. Therefore, the female body 6', 6"' and the male body 5
', 5''' are in an engaged state.

If the hydraulic cylinder 4 is extended in this state, the cargo box 2 will be dumped rearward around the rear universal hinge parts 3', 3'''.

Next, when dumping the cargo box 2 to one side, move the operating lever 10 to the D side and then move the operating lever 9 to the B side, and the locking pins 3'' and 3 are rotated in the same manner as described above. Move the universal hinge on one side, 3//, 31
7/ is in the engaged state, and the unipersal hinge parts 3 and 3' on the other side are in the detachable state, so when the hydraulic cylinder 4 is extended in this state, the cargo box 2 is moved as shown in FIG. can be dumped to the side.

Furthermore, move the operating lever 9 to the A side, and move the operating lever 10 to the C side.
When tilted to the side, the cargo box 2 can be dumped to the side in the opposite direction to that shown in FIG.

When driving, make it possible to dump backwards.

In the above embodiment, the cutout recess 8 was formed on one side of the locking bottle γ. As shown in FIGS. 5 and 6, a cam-shaped engagement convex portion 19 is formed approximately at the center of the locking pin γ, which is rotatable. The female body 6 and the male body 5 can be engaged and disengaged from each other.

Also, instead of operating levers 9 and 10, hydraulic cylinders are used to control each locking bottle. , 7', ? ",T" may be rotated.

As described above, the present invention operates each locking pin of the universal hinge portion from a remote location. Integration of the hinge part. This made it possible to control withdrawal. Control operations in the dump direction are now extremely easy. Furthermore, the structure of the present invention makes it possible to operate multiple locking bins at the same time. Furthermore, by checking the switching position of the operating lever, etc., it is possible to immediately check whether the hinge part is currently in the engaged or disengageable state, which is very convenient.

Since the locking pin and the male body are directly engaged and the engagement point is located on the line connecting the center point of the locking pin and the center point of the male body, there is no rotation of the locking pin. This eliminates the need for a stopper to stop the locking pin from rotating.

[Brief explanation of the drawing]

Fig. 1 is a rear view of a three-turn dump truck equipped with the device of the present invention, Fig. 2 is a sectional view of the universal hinge, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is an operation diagram. , 5 and 6 are cross-sectional views of the hinge portion showing other embodiments of the present invention. FIG. 6 shows a sectional view taken along line BB in FIG. 5. FIGS. 1 and 8 show conventional hinge structures, and FIG. 8 shows a cross section. In the figure, 1 is a vehicle frame, 2 is a cargo box, 5 is a male body, 6 is a female body, and γ is a locking bin. 8 is a recess. 11 is a rotating piece. 19 indicates a convex portion.

Claims (1)

[Claims] 1. In a three-turn dump truck comprising a plurality of releasably removable universal hinge parts, a spherical male body provided on the vehicle frame side and a substantially hemispherical female body provided on the cargo box side, the female body side A locking pin having a concave or convex portion is rotatably provided at approximately the center of the lower part, and the locking pin is connected to an operating section via a transmission member as appropriate, so that the locking pin can be engaged by operating the operating section. Rotating the bottle so that the male body and the locking pin can be freely engaged and detached, and when the male body and the locking pin are engaged, this engagement point connects the center of the male body and the center of the locking pin. A dump direction control device for a three-turn dump truck located on a line.