JPH01317857A - Truck base general purpose car - Google Patents

Abstract

PURPOSE:To improve practicability by fitting the necessary work device unit to the frame of a base body truck capable of a high speed traveling and arranging the telescopic front and rear legs to whose lower end a wheel or clawler capable of a crawling rotation is fitted. CONSTITUTION:The work device units of a back hoe, load cutter, snow removing rotary, etc., for instance, are made installable on the frame of a base body truck 1 and the wheel 6 borne at the lower end of a pair of the right and left front and rear legs 4, 5 besides front and rear wheels 2, 3 is also provided. The respective leg 4, 5 fixes a hydraulic cylinder 8 respectively in the vertical direction at the specified positions of four places of the frame 7 of the truck 1 and is composed by fitting a rod 9 expandably in the vertical direction to the lower part of the respective hydraulic cylinder 8. The wheel 6 is then earthed by extending each leg, 4, 5 and the traveling state at extremely low speed is made to obtain by turning each wheel 6 by a hydraulic motor 10 in the state of floating from a surface ground the wheels 2, 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a truck-based general-purpose vehicle, and more particularly to a truck-based general-purpose vehicle in which a truck is equipped with hydraulically movable wheels or crawlers.

[Conventional technology and issues]

There are many wheel-type urban civil engineering vehicles, but they move slowly and cause traffic congestion, which poses a problem.

In addition, an example of a vehicle with a working equipment unit attached to the base truck is a truck backhoe, but for road cutters, snow removal rotary, etc. that require very low speeds during work, trucks have sufficient traction power. Cannot be used because very low speed cannot be obtained.

Furthermore, since the trunk has a suspension such as a spring, when a load is applied to the work machine, the work machine becomes unstable, resulting in problems such as poor cutting accuracy.

[Means to solve the problem]

The present invention aims to solve the above-mentioned problems by providing a truck-based general-purpose vehicle having the following structure.

That is, the truck-based general-purpose vehicle according to the present invention is a truck-based general-purpose vehicle in which a desired working equipment unit can be attached to the frame of a mother truck, and in addition to the front wheels and rear wheels of the mother truck, a pair of left and right front legs are provided. It has a pair of left and right rear legs, each of which can extend and retract vertically or diagonally, and a wheel or crawler can be hydraulically driven at each end of the front and rear legs. The front and rear legs are extended, the respective wheels or crawlers are grounded, the mother truck is lifted up, and then the truck can be driven by its hydraulically driveable wheels or crawlers. It is characterized by this.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a truck-based general-purpose vehicle according to the present invention will be described below with reference to FIGS. 1 to 5.

FIG. 1 is an overall side view of an embodiment of a truck-based general-purpose vehicle according to the present invention, and the truck-based general-purpose vehicle has a desired working equipment unit such as a backhoe, road cutter, snow removal rotary, etc. on the frame of a base truck 1. It can be installed.

As shown in FIG. 1, the 1-Rack base general-purpose vehicle has, in addition to the front wheels 2 and rear wheels 3 of the base truck 1, a pair of left and right front legs 4 and a pair of left and right rear legs 5, Wheels 6 are attached to the lower ends of the front legs 4 and the rear legs 5, respectively. As shown in FIG. 2, each of the front legs 4 and the rear legs 5 has hydraulic cylinders 8 vertically fixed at four predetermined positions on the frame 7 of the mother truck, and rods 9 are provided below the hydraulic cylinders 8. is attached so that it can expand and contract in the vertical direction.

A wheel 6 directly connected to a hydraulic motor 10 is attached to the lower end of the front leg 4 and the rear leg 5 via a bracket 11, respectively, as shown in FIG. Since the wheel 6 is attached to the frame 7 of the truck via a hydraulic cylinder 8, a rod 9, a bracket 11, and a hydraulic motor 10, it is completely unaffected by suspensions such as springs of the truck.

An example of a drive system for the hydraulic motor 10 directly connected to the wheel 6 is one based on the hydraulic system diagram shown in FIG. 3 or FIG. 4.

In the hydraulic system diagram shown in Fig. 3, a power takeoff device (PTO) 13 is attached to a truck engine 12,
When the hydraulic pump 14 attached to the O13 is operated, the hydraulic pressure from the hydraulic pump 14 reaches each hydraulic motor 10 via the valve 15, and the wheel 6 directly connected to the hydraulic motor 10 is driven. ing.

Reference numeral 16 denotes a main transmission, which is used when the vehicle travels using the front wheels 2 and rear wheels 3.

In addition, in the hydraulic system diagram shown in FIG. 4, a separate engine 17 is installed instead of the truck engine 12 as the hydraulic pump engine, and the hydraulic pump 14 attached to the separate engine 17 is operated. , hydraulic pressure from the hydraulic pump 14 is supplied to each hydraulic motor 1 via a valve 15.
0, and the wheel 6 directly connected to the hydraulic motor 10 is driven.

In the above-described embodiment, the front #14 and the rear #5 are shown as being able to expand and contract in the vertical direction, but they can also be made to expand and contract in the diagonal direction.

When attempting to run the mother truck 1 using the wheels 6 at the lower ends of the front legs 4 and rear legs 5 without using the front wheels 2 and rear wheels 3, do as follows.

First, when the rods 9 of the hydraulic cylinders 8 of the front legs 4 and the rear legs 5 are extended and the respective wheels 6 are brought into contact with the ground, the front wheels 2 and the rear wheels 3 of the mother truck 1 are lifted off the ground.

If the wheel 6 is then driven by the hydraulic motor 10 in this state, a very low speed can be obtained.

In the embodiment shown in FIGS. 1 to 4, a wheel 6 is attached to the lower end of the front leg 4 and the rear leg 5, respectively, but as in the modified example shown in FIG. A crawler 18 can also be installed instead of the wheel 6.

〔Effect of the invention〕

Since the truck-based general-purpose vehicle according to the present invention is configured as described above, it can travel at high speed using the front and rear wheels of the truck during normal movement, and when a very low speed is required during work. Traveling at a very low speed suitable for the work is the turning part, and when traveling by hydraulic drive of wheels or crawlers attached to the front and rear legs, stable traveling is possible regardless of the truck's suspension and good work accuracy is achieved. Obtainable.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of an embodiment of a truck-based general-purpose vehicle according to the present invention, FIG. 2 is a diagrammatic cross-sectional view showing the structure of the front and rear legs of the truck-based general-purpose vehicle of FIG. 1, and FIG. Fig. 1 is a hydraulic system diagram for the hydraulic drive wheels of the truck-based general-purpose vehicle; Fig. 4 is a hydraulic system diagram of a modified example of Fig. 3; and Fig. 5 is an overall side view of a modified example of the truck-based general-purpose vehicle of Fig. 1. It is a diagram. 1 ... Mother truck 2 ... Front wheel 3 ... Rear wheel 4 - Front leg 5 ... Rear leg 6 ... Wheel 7 ... Frame 8 ... Hydraulic cylinder 9 ... Rod 10 ... Hydraulic motor 11 ... Bracket 12 ... Truck engine 13 ... Power extraction device? (PTO)1
4... Hydraulic pump 15... Pulp 16... Main mission 17... Separate engine 18... Crawler agent Patent attorney Isao Fujimoto Agent Patent attorney Takeo Goto Figure 1 Figure 3 b b

Claims (1)

[Claims] A truck-based general-purpose vehicle capable of attaching a desired working equipment unit to the frame of a mother truck, which includes a pair of left and right front legs and a pair of left and right rear legs in addition to the front wheels and rear wheels of the mother truck; The front legs and the rear legs can be extended and contracted vertically or diagonally, and wheels or crawlers are mounted on the lower ends of the front legs and the rear legs so that they can be driven hydraulically, thereby extending the front legs and the rear legs. A truck-based general-purpose vehicle, characterized in that the truck-based general-purpose vehicle is adapted to be able to travel by the hydraulically driveable wheels or crawlers after each of the wheels or crawlers are grounded and the base truck is lifted off the ground.