JPH01285469A - Truck-base general purpose vehicle - Google Patents

Abstract

PURPOSE:To make a truck travelable in a state of having it floated by installing each wheel in a symmetrical pair of front legs and rear legs installed in a car body, aside from front and rear wheels of the truck, and making these front and rear wheels foldable each at need. CONSTITUTION:A parent truck 1 has a symmetrical pair of front legs 4 and rear legs 5 in addition to front wheels 2 and rear wheels 3, and each wheel 6 is attached to respective lower ends of these front and rear legs 4 and 5. A cylinder builtup body 9 is attached to each bracket 8 clamped to four spots of a frame 7 in almost parallel with this frame 7, and each of front legs 4 and rear legs 5 is pivotally attached to a tip of a rod 10 of the cylinder builtup body 9. Each wheel 6 can be made to go up or down by expanding or contracting this cylinder builtup body 9.

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 provided with hydraulically driven 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 trucks have suspensions such as springs, when a load is applied to the working machine, the working 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, the front legs and the rear legs are respectively foldable in the front and back or left and right lateral directions, and wheels or crawlers are respectively mounted on the lower ends of the front legs and the rear legs so as to be hydraulically drivable. The front and rear legs are thereby extended and each of the wheels or crawlers are brought into contact with the ground so that the mother truck can be lifted up and then be driven by its hydraulically driveable wheels or crawlers. That is.

〔Example〕

Embodiments of a truck-based general-purpose vehicle according to the present invention will be described below with reference to FIGS. 1 to 9.

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

As shown in FIG. 1, the truck-based general-purpose vehicle has, in addition to front wheels 2 and rear wheels 3 of a 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 rear g15, respectively. In addition, as shown in FIG. 2, the front leg 4 and the rear #5 have cylinder assemblies 9 attached almost parallel to the frame 7 to brackets 8 fixed at four predetermined positions on the frame 7 of the mother truck. A front leg 4 or a rear leg 5 is attached to the tip of a rod 10 of the assembly 9 so that the front leg 4 or the rear leg 5 can be folded and driven forward or backward using a support shaft 11 fixed to the frame 7 as a fulcrum, respectively.

A wheel 6 directly connected to a hydraulic motor 12 is attached to the lower ends of the front leg 4 and the rear leg 5, respectively, as shown in FIGS. 2 and 3. Since the wheel 6 is attached to the frame 7 of the truck via a support shaft 10, front legs 4 or rear legs 5, and a hydraulic motor 12, it is completely unaffected by suspensions such as springs of the truck.

An example of a drive system for the hydraulic motor 12 directly connected to the wheel 6 is one based on the hydraulic system diagram shown in FIG. 4 or FIG. 5.

The hydraulic system diagram shown in Figure 4 is a power extraction device for the truck engine 13! (PTO) 14 is installed, PT
When the hydraulic pump 15 attached to the O14 is operated, the hydraulic pressure from the hydraulic pump 15 reaches each hydraulic motor 12 via the pulp 16, and the wheel 6 directly connected to the hydraulic motor 12 is driven. ing.

Reference numeral 17 denotes a main transmission, which is used when the vehicle travels using the front wheels 2 and rear wheels 3.

Also, in the hydraulic system diagram shown in FIG. 5, a separate engine 18 is installed instead of the truck engine 13 as the hydraulic pump engine, and the hydraulic pump 15 attached to the separate engine 18 is operated. , hydraulic pressure from the hydraulic pump 15 is supplied to each hydraulic motor 1 via a valve 16.
2, the wheel 6 directly connected to the hydraulic motor 12 is driven.

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 10 of the hydraulic cylinder assemblies 9 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 12 in this state, a very low speed can be obtained.

FIG. 6 shows an overall side view of a second embodiment of a truck-based general-purpose vehicle according to the present invention, in which front legs 21 and rear legs 22 are attached so as to be foldable in left and right directions. As shown in FIGS. 7 and 8, arms 23 are fixed to four predetermined positions 1 on the frame 7 of the mother truck so as to project laterally, and the front legs 21 A wheel 6 directly connected to a hydraulic motor 12 is attached to the bent lower ends of the front leg 21 and the rear leg 22. Cylinder assemblies 25 are connected in a link-like manner between the arm 23 and the front legs 21 and rear legs 22, respectively, and the front legs 21 and the rear legs 22 are moved horizontally to the left and right with respect to the mother truck 1 by the operation of the cylinder assemblies 25 by hydraulic pressure. It is designed to be folded in the direction. This embodiment is the same as the first embodiment except that the front legs and the rear legs are folded laterally.

In the embodiments shown in FIGS. 1 to 8, wheels 6 are attached to the lower ends of the front and rear legs, respectively, but as in the modified example shown in FIG. A crawler 26 can also be installed instead.

〔Effect of the invention〕

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

[Brief explanation of the drawing]

1 is an overall side view of a first embodiment of a general-purpose truck-based type according to the present invention; FIG. 2 is a diagrammatic side view showing the structure of the front and rear legs of the general-purpose truck-based type of FIG. 1; The figure is a diagrammatic sectional view of Figure 2, Figure 4 is a hydraulic system diagram for the truck-based general-purpose hydraulic drive wheel of Figure 1, Figure 5 is a hydraulic system diagram of a modification of Figure 4, and Figure 6 is a hydraulic system diagram of a modified example of Figure 4. The figure is an overall side view of a second embodiment of the truck-based general-purpose type according to the present invention, FIG. 7 is a diagrammatic side view showing the structure of the front and rear legs of the truck-based general-purpose type of FIG. 6, and FIG. FIG. 7 is a diagrammatic sectional view, and FIG. 9 is an overall side view of a modification of the general-purpose truck base type shown in FIG. 1 or FIG. 6. [Explanation of symbols] 1 ... Mother truck 2 ... Front wheel 3 ... Rear wheel 4 ... Front leg 5 ... Rear leg 6 ... Wheel 7 ... Frame 8 ... Bracket 9 ... Cylinder assembly 10 ... Rod 11 ... Support shaft 12 ... Hydraulic motor 13 ... Truck engine 14 ... Power takeoff device (PTO) 15 ...
- Hydraulic pump 16... Valve 17... Main mission 18... Separate engine 21... Front leg 22... Rear leg 23... Arm 24... Support shaft 25... Cylinder assembly 26 ... Crawler agent Patent attorney Isao Fujimoto Agent Patent attorney Takeo Goto Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

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 are foldable in the front and back or left and right lateral directions, and wheels or crawlers are mounted on the lower ends of the front and rear legs so that they can be driven hydraulically, thereby folding the front and 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 driven wheels or crawlers after the base truck is lifted by extending each of the wheels or crawlers to the ground.