JPS6226948B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides four or more driving wheels on each of the left and right sides of the vehicle body, arranged in the longitudinal direction of the vehicle body, and
This invention relates to a transport vehicle in which left and right wheel groups can be independently driven and stopped.

Transport vehicles with the above configuration have high propulsion performance on wetlands and rough terrain because they run on multiple wheels, but generally all wheels are installed in fixed positions and the height of the loading platform is Because small-diameter wheels are used for this purpose, the tip of the Problems sometimes occurred, such as the wheels being unable to ride on the ridges, or, as shown in Figure 6, all the front and middle wheels lifting up, resulting in insufficient thrust. In addition, when the vehicle rides up the ridges, there is a problem in that the impact of hitting the ridges is generated, resulting in poor riding comfort.

As a means to deal with such problems, it is possible to support all the wheels via an elastic suspension mechanism so that they can be raised and lowered independently. There is a drawback that the front and rear tilting posture changes, and if the height of the loading platform is low from the ground due to the loaded load, if there is a convexity on the road surface between the left and right wheels, the lower abdomen of the vehicle may be rubbed, or When going over ridges, the wheels rose and scraped the lower abdomen of the car body, which was lower relative to the ground, making it unsuitable for practical use.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a transport vehicle that can smoothly cross over ridges, etc., and that can maintain a constant body posture during normal travel and travel stably. do.

Next, embodiments of the present invention will be described based on the drawings.

An engine 3, a transmission 4 interlocked with the engine 3, and a control unit 5 are arranged in parallel in the left-right direction of the vehicle on the front side of a traveling device 2 in which four wheels 1 on each side are arranged in the front-rear direction of the vehicle body. At the same time, a dump truck 6 is mounted on the rear side of the truck to form a multi-wheeled truck.

The traveling device 2 is constructed by connecting a pair of left and right main frames 7, 7 at their front ends with a case 8 in a transmission mechanism, and by connecting their rear ends with a horizontal frame 9. A vehicle body 10 on which the loading platform 6 is placed is formed, and wheel installation members 11 are provided at intervals in the front-rear direction of the main frames 7, 7 and protrude outward from the sides of the frames, and have front and rear ends. As shown in FIG. 3, two vertical supports 27, 27 connected to the wheel mounting case 12a are attached to the members 11a corresponding to the wheels 1a so as to be able to move up and down independently. Compression springs 13 for allowing the wheels 1 to rise against the downward biasing force are interposed between the members 11 to elastically support the wheels 1a at the front end and the rear end so that they can be raised and lowered independently. Elastic suspension mechanism 2
It consists of 8... Further, wheel mounting cases 12 are fixed to the construction members 11 corresponding to the other wheels 1 through brackets 29.

As shown in FIGS. 2 and 3, the traveling gear transmission mechanism 14 includes left and right steering clutches 15, 15 on the transmission output gear 4a of the transmission 4 linked to the engine output shaft. Steering operation mechanism 1
The input gears 16a of 6 are engaged, and the steering operation mechanism 16 is installed inside the case 8, and the left and right steering output shafts 17, 17 are installed on the left and right main frames 7, 7, and the output shafts 17 Driven shafts 18 whose axes are parallel to each other are rotatably installed on each of the left and right main frames 7, 7 with a space apart in the longitudinal direction of the vehicle body.
A chain sprocket 20 for winding the transmission chain 19 is fixed to each of the parts.

A gear 22a is connected to the axle 21 of the wheel 1.
A gear type reduction mechanism 22 consisting of a small diameter gear 22b meshing with the small diameter gear shaft 23 is installed inside the wheel case 12, and the small diameter gear shaft 23 and the shafts 17, 18 are connected to each other.
... are interlocked and connected to their connecting portions by a transmission shaft 25 via universal joints 24, 24,
In addition, a dust-proof bellows 26 is provided on the transmission part, so that the left and right wheel groups can be integrally driven, and the left and right wheel groups can be independently driven and stopped to perform left-right steering. There is.

Furthermore, as shown in Fig. 4, the suspension mechanism 2
The same transmission structure is used for the fixed position wheels 1 that are not supported by the wheels 8.

According to the above configuration, when riding on the ridge 30 as shown in FIG. The vehicle climbs over the vehicle smoothly, and the wheel 1a at the rear end and the fixed wheel 1 in front of it are also in contact with the ground, so the vehicle can climb over the vehicle reliably without causing a lack of thrust. Furthermore, during normal running on flat ground, the two front and middle wheels 1, 1 are in stable contact with the ground, so that the height of the loading platform 6 and the tilted posture of the aircraft body are kept constant regardless of the load on the loading platform 6.

As explained above, according to the present invention, the wheels at the front and rear ends are driven via a transmission mechanism equipped with a universal joint, and are independently suspended by an elastic suspension mechanism, so that the wheels do not ride on raised parts such as ridges. In addition to being able to do this smoothly and reliably, the impact of riding over the aircraft can be alleviated, and moreover, during normal running, the aircraft is supported by a plurality of fixed wheels midway between the front and rear, allowing it to travel stably.

Furthermore, since the front wheels are driving wheels, compared to, for example, a case where the front wheels are non-driving wheels, when going over a ridge, the front wheel is pressed against the ridge by the rear driving wheel, causing the ridge to collapse. In other words, since the front wheels are the driving wheels, even if the front wheels are pushed against the ridges by the rear driving wheels, they can drive and rotate themselves, so they will use their propulsion to overcome the ridges. This prevents the vehicle from collapsing over the ridges, and thanks to the fact that the front wheels are the driving wheels and is supported by an elastic suspension mechanism, the vehicle can go over the ridges smoothly.

[Brief explanation of the drawing]

The drawings show an embodiment of the transport vehicle according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a plan view of the traveling transmission structure, and Fig. 3 is a sectional view taken along the line - in Fig. 2.
4 is a cross-sectional view taken along the line -- in FIG. 2, FIG. 5 is a schematic side view of the main parts showing the operating state, and FIG. 6 is a side view showing the operating state of the conventional structure. 1, 1a...Wheel, 28...Elastic suspension mechanism.

Claims (1)

[Claims] 1 4 or more drive wheels 1..., 1 on each of the left and right sides of the vehicle body
... are arranged in the longitudinal direction of the vehicle body, and the left and right wheel groups 1..., 1... are configured to be able to be driven and stopped independently, and in each of the left and right wheel groups 1..., the front end and The power transmission system for the rear end wheels 1a is equipped with a universal joint 24, and a traveling gear transmission mechanism 14 is provided, which transmits driving force regardless of changes in the vertical position of the front and rear wheels 1a with respect to the vehicle body. At the same time, the wheels 1a at the front and rear ends are supported by an elastic suspension mechanism 28 so that they can be raised and lowered independently, and the other wheels 1 located between the front and rear are fixed in position. A transport vehicle characterized by certain things.