JPS5855931B2 - Control device for hinge part in 3-turn dump truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a hinge part in a three-turn dump truck, which allows a cargo box to be dumped in a desired direction behind or on either side from a driver's cab located remotely. It is something.

Conventionally, the hinge structure of this type of three-turn dump truck was
As shown in the figure and FIG. 8, it is constructed by fitting a spherical male body 02 provided on the vehicle frame side into a hemispherical female body 01 provided on the cargo box side. This is done by inserting a locking pin 03 into the lower part of the female body 01 to prevent the male body 02 from being removed.

By the way, with the above structure, if you want to dump the cargo box in a desired direction, either backward or on both sides, it is necessary to crawl under the bottom of the cargo box and pull out each locking pin each time. When driving, it is necessary to crawl to the bottom of the cargo box to check whether the locking pin is inserted correctly, which is extremely troublesome to operate.

In view of the above-mentioned problems, the present invention is designed to enable locking to be controlled from a remote operator's cab and to easily confirm the locking.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In the figure, 1 is the vehicle frame, 2 is the cargo box mounted on the vehicle frame 1, and 3
, 3', 3", 3"' connect and detach the cargo box 2 and the vehicle frame 1, and the front and rear, left and right portions are provided with Lareta universal hinge parts, and 4 is the approximately central portion between the vehicle frame 1 and the cargo box 2. The hinge portions 3, 3' are interposed therein.

3", 3"' indicates a hydraulic cylinder capable of dumping the cargo box 2 in a desired direction, either rearward or on both sides.

Since the hinge parts 3, 3', 3", and 3' have the same structure, one hinge part 3 will be explained with reference to FIGS. 2 and 3. The hinge part 3 is installed horizontally on the vehicle frame 1. A spherical male body 6 protrudes from the end of the front support member 5, which is fixed to the lower surface of the packing box 2 opposite to the male body 6, and has a substantially hemispherical inner and outer surface with an opening facing downward. It is composed of a female body 7 and a female body 2.

Reference numeral 8 in FIGS. 2 and 3 indicates a locking pin that can be moved forward and backward by a guide tube 9 fixed to the side end of the support member 5, and the engaging portion at the tip of the locking pin 8 extends laterally. When the locking pin 8 and the female body 7 are engaged, the male body can be inserted into the female body 7 and engaged with the shoulder 10 on the upper outer surface of the female body 7. Female body 1 will not be overtaken for 6,
Further, when the locking pin 8 and the female body γ are disengaged, the female body 7 is designed to be pulled out from the male body 6 fitted into the female body 7.

The other hinge parts 3', 3", 3"' are also provided with locking holes 78', 8", 8"' similar to those described above.
In particular, the rear locking pins 8〃, 8〃' are a pair of locking portions 8"S, 8"R and 8"' whose tips face sideways and backwards, as shown in FIGS. 4 and 5. The locking portions 8"S, 8"R and 8"'S are formed.

8"'R is female body γ//, shoulder 10' of 7//l,
10"', and when side dumping the cargo box 2, the locking portions 8"S or 8" extending laterally can be engaged with each other.
``S'' prevents the hinge portion 3'' or 3'' from coming off, and when the cargo box 2 is dumped backward, the locking portions 8''R and 8'' extend rearward.
"'R prevents the hinge parts 3", 3"' from coming off.

Next, each universal hinge part 3, 3', 3''.

The operation system for advancing and retracting the respective locking pins 8, 8', 8'', and 8'' of 3"' will be explained with reference to FIG. Front bell cranks 11 and 12 are provided, and a pair of left and right rear bell cranks 13 and 14, which are rotatable in a horizontal plane, are provided at the rear of the vehicle frame 1, as described above.

One swing arm 11' of the front bell cranks 11, 12
, 12' and one of the swinging arms 13', 14' of the rear bell cranks 13, 14 are connected by transmission rods 15, 16, so that the bell cranks 11.13 and 12.14 rotate in synchronization, respectively. It is now possible to do so.

the other swing arm 11 of the front bell cranks 11, 12;
12 is a left and right cross rod 17 extending in both sides.
17' to the front locking pin 8°8' and the other swinging arm 13" of the rear bell crank 13.14,
14" is an inner cross rod 19 with left and right swinging arms 18°18' that are rotatably supported in the horizontal plane.
, 19' and outer cross rods 20, 20' to the rear locking pin 8'' 8771 as before.

Reference numerals 21 and 22 indicate operating levers that are installed in the driver's cab 23 and can be switched to two positions A, B, C, and D, respectively. One of the swinging arms 11', 1 of the front bell cranks 11, 12 is connected via wires 24 and 25.
2' respectively.

If you now move the operating levers 21 and 22 to positions B and C,
The left and right pair of rear locking pins 8", 8' are female bodies 7", 7
The front locking pins 8, 8' are engaged with the shoulders 10'' and 10'' of the female body 7.γ', and the cargo box 2 is thereby dumped rearward. can be done.

In addition, the operating lever 21 is switched to the B position and the operating lever 22 is switched to the D position, or the operating lever 21 is switched to the A position.
When the operating lever 22 is switched to the C position, the front and rear hinge parts 3, 3' or 3', 3'' are locked, and the other hinge parts 3/, 3/
/I or 3,3'' is in a detachable state, thereby allowing the cargo box 2 to be dumped to the desired side.

With the above configuration, if the present invention is to dump the cargo box 2 backward, the operating lever 21 is moved to the B side, and the operating lever 22 is moved to the B side.
When the locking pins 8 and 8' of the front hinge parts 3 and 3' are moved toward the C side, the locking pins 8 and 8' of the front hinge parts 3 and 3' retreat inward as shown by the two-dot chain lines in Fig. 6 and 6' are in a removable state, while the rear hinge parts 3'' and 3
The locking pins 8'', 8'' of the locking pins 8'', 8'' move outward as shown by solid lines in FIGS. "'S, 8"R, 8"'R is female body 1"
, 7"', the female bodies 7", γ"' and the male bodies 6", 6"' 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 hinge portions 3'', 3''.

By the way, even if the cargo box 2 is tilted due to the above-mentioned operation, the hinge portions 3'', 3'' are held by the rearward locking portions 8'R, 8''.
“′ does not leave diagonally upward.

Next, when dumping the cargo box 2 to one side, move the operating lever 21 to the A side while keeping the operating lever 22 to the C side, and the left locking pins 8' and 8'' At the same time, the locking pins 8, 8'' on the right side move outward, and the hinge parts 3, 3 on one side are in an engaged state, and the hinge parts 31, 3//I on the other side are in a detachable state. Therefore, if the hydraulic cylinder 4 is extended in this state, the cargo box 2 can be dumped to the side as shown in FIG.

Furthermore, by tilting the operating lever 21 to the B side and the operating lever 22 to the D 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.

As described above, the present invention provides universal hinge parts having a spherical male body on the car frame side and an inner and outer hemispherical female body on the cargo box side at the front, rear, left and right positions, and furthermore provides a guide on the car frame side close to each hinge part. The cylinder is fixed, and the front left and right guide cylinders are provided with locking pins having locking portions extending laterally so as to be movable back and forth,
The rear left and right guide cylinders are provided with locking pins having locking portions extending laterally and rearward so that they can move forward and backward, and by selectively engaging the plurality of locking pins with the outer surface of the female body, the locking pins can be moved sideways or backwards. Since it can be dumped backwards, the structure is very simple and the operation is easy, and there is no need to crawl to the bottom of the cargo box and remove the locking pin as in the conventional case.

[Brief explanation of the drawing]

Figure 1 is a rear view of a three-turn dump truck equipped with the device of the present invention, Figure 2 is a rear sectional view of the front hinge, Figure 3 is a plan sectional view of Figure 2, and Figure 4 is the rear hinge. 5 is a plan sectional view of FIG. 4, FIG. 6 is an operation system diagram of the hinge section, FIGS. 7 and 8 show the conventional hinge structure, and FIG.
The figure is a side view, and FIG. 8 is a rear unloading view. In the figure, 1 is the vehicle frame, 2 is the cargo box, 3 is the hinge part, and 6
is a male body, γ is a female body, 8 is a locking pin, and 9 is a guide tube.

Claims (1)

[Claims] 1. A spherical male body on the vehicle frame side and a roughly hemispherical female body on the cargo box side with the opening facing downward, allowing the body to be freely engaged and detached.1ff
The outer surface of the female body of each hinge part is approximately hemispherical, and a guide is provided on the vehicle frame side adjacent to each hinge part. The cylinders are fixed, and locking pins having locking portions extending laterally are provided on the left and right front guide cylinders so as to be movable laterally. A locking pin having a locking portion extending toward the rear and a locking portion extending rearward is provided so as to be movable laterally, and the locking pin is advanced by an operating portion provided on the vehicle frame side. A control device for a hinge part in a three-turn dump truck, in which a locking part engages with an outer surface of a female body.