JPS621782Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a dump truck in which three or more drive wheels are arranged in the left and right wheel drive chain cases, arranged in the longitudinal direction and positioned laterally outward. The present invention relates to vehicles, and specifically relates to an improvement in the arrangement structure of a locking device for a tilt plate for dumping on a loading platform.

Conventionally, when installing the above-mentioned locking device, the working end of the locking device, which fixes or releases the tilting plate in conjunction with the dumping operation of the loading platform, faces the lower swinging end of the tilting plate at the rear of the loading platform, and the working end The interlocking part of the locking device is attached to a pair of left and right wheel drive chain cases arranged in the longitudinal direction of the vehicle body.
In plan view, the locking device was placed on the left and right sides and in a direction along the left and right sides, but since the locking device is now located between the chain case and the drive wheel located on the side and outside of the chain case, Dump trucks are often used in poor driving conditions such as on soft ground, so
There is a drawback that mud, sand, grass stalks, etc. thrown up by the drive wheels adhere to or get caught in the interlocking parts of the locking device, causing malfunction of the locking device.

The purpose of the present invention is to prevent malfunctions of the locking device due to adhesion or encroachment of dirt, grass stems, etc. by simply changing the arrangement of the locking device, in view of the above-mentioned conventional situation. .

A feature of the present invention is that the locking device for the dump swing plate of the loading platform is arranged inside the left and right wheel drive chain cases when viewed from above.

The functions and effects of the characteristic configuration of the present invention are as follows. In other words, by placing the locking device inside the pair of chain cases, the chain case itself, which is long in the longitudinal direction of the vehicle body, prevents dirt and grass stalks thrown up by the drive wheels from reaching the locking device. This has made it possible to prevent malfunctions of the locking device due to the adhesion or encroachment of dirt and grass stems, and to ensure the secure fixing and unfixing of the tilt plate during the dumping operation of the loading platform. It has become possible to improve the efficiency of transport and dump operations by eliminating the time required to remove soil and grass stems that have adhered to or become lodged in the equipment.

Embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in FIG. 1, a vehicle body equipped with a multi-wheeled traveling device 1 and a loading platform 3 are installed so that they can be freely driven and oscillated around a horizontal axis at the rear of the vehicle body by means of a hydraulic cylinder 4. , is installed in the control section 5 on one side of the control section, and an engine 5 and a transmission case 7 are arranged in the longitudinal direction at the center of the left and right sides of the vehicle body on one side of the control section, thereby providing a transport vehicle capable of dumping operation. It is configured.

The traveling device 1 includes a pair of left and right chain cases 8a and 8b disposed below the loading platform 3 in the longitudinal direction of the vehicle body, arranged in the longitudinal direction and positioned laterally outward. The four tire wheels 9 are mounted on the shaft, and the chain case 8
A chain-type interlocking mechanism, which is installed inside the wheels 9 and 8b and is interlockingly connected to each wheel 9, is interlockingly connected to the engine 6 via a pair of left and right steering clutches and a gear transmission in the transmission case 7. The vehicle body is configured to be steered by driving all the wheels 9 integrally or by driving each of the left and right wheels separately.

To configure the loading platform 3, among the side plates provided around the periphery of the bottom plate 10 on which the load is placed, the side plates 11a on both sides of the loading platform 3 are swingable to open/close and fixed around the horizontal axis on the lower end side thereof. The side plates 11b connected to the bottom plate 10 and located on the front end side of the loading platform 3 are inclined toward the front of the vehicle body over the entire width thereof,
In a state where the loading capacity of the loading platform 3 is increased, the bottom plate 10 is erected, and the side plate located at the rear end of the loading platform 3 is used as a tilt plate 11C that can swing open and close around the horizontal axis on the upper end side. 10 is pivotally connected to pillars 12 erected at both left and right ends of the rear side, and as the loading platform 3 moves to dump, its own weight causes the tilt plate 11C to
The tilt plate 11C is oscillated to open and close to release loose cargo such as earth and sand to the rear of the vehicle body, and when the dumping operation of the loading platform 3 is completed, the tilting plate 11C is automatically locked by the tilting plate 11C locking device 13 provided on the underside of the loading platform 3. It is configured to be fixed in the closed position.

The locking device 13 includes a hook 14 that engages with a pin 21 provided at the lower end of the tilt plate 11C when the tilt plate 11C is in the closed position, as shown in FIG.
A roller 16 is attached to one end of a support bracket 15 that is swingably supported at the lower part of the rear end of the loading platform 3 and protrudes from the lower surface of the bottom plate 10 at a location in front of the vehicle body than the pivot connection portion of the loading platform 3 to the vehicle body. L with attached
The mold arm 17 is swingably supported at its bent portion, and the hook 14 and the other end of the L-shaped arm 17 are interlocked and connected by a buffer rod 19 equipped with a spring 18, and the loading platform 3 and the buffer rod are connected together. A spring 20 is provided between the loading platform 3 and the loading platform 3 to constantly bias the hook 14 toward the disengagement side with the pin 21.
In the seating position of the vehicle, the spring 2
The urging force of the spring 20 is maintained so as to maintain the engaged state of the hook 14 and the pin 21 against the zero force, and to release the contact between the roller 16 and the stopper 22 as the loading platform 3 is dumped. By hook 14
is detached from the pin 21, and is configured to allow the swing plate 11C to swing open and close due to its own weight,
As shown in FIGS. 2 and 4, a pair of locking devices 13 are disposed inside and along a pair of chain cases 8a and 8b disposed in the front-rear direction of the vehicle body in plan view. Lock device 1 locks mud and grass stems thrown up from below by 9.
3 is prevented by using chain cases 8a and 8b, and malfunction of the locking device 13 due to adhesion of mud or grass stalks is avoided.

Next, another embodiment will be described in detail.

To construct the locking device 13 for fixing the tilt plate 11C, various types of locking devices can be applied in terms of conventional technology and mechanics, and its structure can be modified in various ways.

The dump truck according to the present invention can be applied to various dump trucks equipped with a pair of left and right chain cases provided with three or more drive wheels.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the dump truck according to the present invention, and FIG. 1 is an overall side view of the dump truck, FIG. 2 is a partially cutaway plan view of the loading platform, and FIG. The line sectional view and FIG. 4 are rear views of the dump truck. 8a, 8b...Chain case, 9...Wheel,
11C...Movement plate, 13...Lock device.

Claims (1)

[Scope of utility model registration request] Left and right wheel drive chain cases 8a, 8
b, a dump truck is provided with three or more drive wheels 9 arranged in the longitudinal direction and positioned laterally outward, and the dump truck tilt plate 1 of the loading platform
A dump truck characterized in that a 1C locking device 13 is disposed inside the chain cases 8a, 8b in plan view.