JPH0218773Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is installed on a vehicle equipped with a working machine such as a crane, an excavator, or a lift device.
This invention relates to an outrigger device that extends outward from a vehicle to stably support the vehicle when a working machine is in use.

This type of outrigger device is shown in Figures 1 and 2.
It is configured as shown in the figure. That is, the outrigger device A includes an overhanging device 4 consisting of an outer cylinder 2 with a hollow rectangular cross section that is suspended horizontally on the frame 1 of the vehicle, an inner cylinder 3 with a hollow rectangular cross section that is telescopically fitted into the outer cylinder 2, and A jacking outer cylinder 5 is attached to the tip of the inner cylinder 3 of the extending device 4, and a swinging fulcrum 6 is attached to the lower end.
The jack outer cylinder 5 has a leg plate 7 attached through the
A hydraulic cylinder (not shown) is telescopically inserted into the
The hydraulic jack 9 is comprised of a jack inner cylinder 8 that is driven to expand and contract by a hydraulic jack 9. In the conventional outrigger device, when the vehicle 1 is jacked up, the leg plate 7 of the jacking device 9
The jacking outer cylinder 5 of the jacking device 9 is attached to the tip of the inner cylinder 3 of the jacking device 4 so that the swinging fulcrum 6 is located vertically below the telescopic axis P of the jacking device 4 (FIG. 2).

However, in the conventional outrigger device configured as described above, due to the backlash in the twisting direction that exists between the outer cylinder 2 and the inner cylinder 3 of the extending device 4, when the vehicle is jacked up, the vehicle is The drawback is that it swings in the - direction. By minimizing the play in the twisting direction between the outer cylinder 2 and the inner cylinder 3 of the tensioning device 4, it is possible to prevent the vehicle from swinging in the longitudinal direction when jacking up. Not only is it impossible to prevent this, but it also causes an increase in costs.

The present invention aims to provide a new outrigger device that eliminates the drawbacks of the conventional outrigger devices as described above, and is designed so that the supporting force of the jacking device generates a twisting force on the extending device when the vehicle is jacked up. This is intended to completely prevent the vehicle 1 from swinging in the longitudinal direction during jack-up.

An embodiment of the jacking device of the present invention will be described in detail below with reference to FIG. 3 and subsequent figures. The configuration of the outrigger device according to the present invention differs from the conventional outrigger device described in FIGS. 1 and 2 in the attachment structure of the inner cylinder 3 of the extending device 4 and the jack outer cylinder of the hydraulic jack 9. Since the other structures are the same, in the following description, the structural description and symbols explained in FIGS. Only the structural part will be explained.

In FIGS. 3 and 4, the outer cylinder 5 of the hydraulic jacking device 9 is configured such that the swinging fulcrum 6 of the leg plate 7 is spaced apart from the telescopic axis P of the extending device 4 by l in the traveling direction of the vehicle in plan view. It is fixedly disposed at the tip of the inner cylinder 3 of the extending device 4.

Next, the effect will be explained. When the inner cylinder 3 is appropriately extended from the outer cylinder 2 of the extending device 4 and the hydraulic jack device 9 is extended to jack up the vehicle, the hydraulic jack device 9 supports the weight of the vehicle. As shown in FIG. 4, this supporting force F is transmitted from the swinging fulcrum 6 of the hydraulic jacking device 9 to the ground via the leg plate 7. , are separated by l in the direction of travel of the vehicle in plan view, so
A twisting force of F×l is generated in the stretching device 4.
As a result, the inner tube 3 of the extending device 4 is twisted within the outer tube 2, as shown in FIG. 4. Consider a case where a force is applied to the vehicle in the longitudinal direction (in the E-L direction in FIG. 3) in this state. First, when a force is applied in the direction B, the inner cylinder 3 of the tensioner 4 is sufficiently twisted with respect to the outer cylinder 4, so there is a gap between the outer cylinder 2 and the inner cylinder 3 that cannot be used to shake the vehicle in the direction B. There are no rattles to move it. Therefore, the vehicle is prevented from swinging in the direction B. Further, when a force in the A direction is applied, the twisting force acting on the extending device 4 is resisted, and the swinging of the vehicle in the A direction is prevented.

Incidentally, in the case where the outrigger device according to the present invention is installed with the outer cylinder 2 of the extending device 4 horizontally suspended in the front position of the vehicle, the swing fulcrum 6 of the leg plate 7 of the hydraulic jacking device 9 in plan view If the outer cylinder 2 of the extending device 4 is installed so as to be spaced forward from the telescopic axis of the extending device 4, and the outer cylinder 2 of the extending device 4 is installed horizontally at the rear end of the vehicle, the hydraulic jack device 9 The swinging fulcrum 6 of the leg plate 7 of
It is preferable that the extension device 4 is provided so as to be spaced apart from the expansion/contraction axis of the extension device 4.

In the above embodiment, when attaching the leg plate 7 to the lower end of the jacking inner cylinder 8 of the jacking device 9,
Although the leg plate 7 is attached via the swinging fulcrum 6, the leg plate 7 may of course be fixedly attached to the lower end of the jack inner cylinder 8. If the jacking outer cylinder 5 of the hydraulic jacking device 9 is attached to the tip of the inner cylinder 3 of the extending device 4 so that the positional relationship in plan view is spaced apart in the front-rear direction of the axle, the same effect as described above can be obtained.

As described above, the present invention provides for attaching the jacking outer cylinder of the hydraulic jacking device to the tip of the inner cylinder of the extending device so that the positional relationship in plan view between the leg plate of the hydraulic jacking device and the telescopic axis of the extending device is spaced apart in the longitudinal direction of the vehicle. Since it is installed, the supporting force of the hydraulic jack generates a twisting force on the extending device, which prevents the vehicle from swinging back and forth due to the play in the twisting direction that exists between the outer cylinder and the inner cylinder of the extending device. Although it has a simple structure, it can completely prevent the vehicle from moving forward and backward when the vehicle is jacked up, and its practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional outrigger device, FIG. 2 is a sectional view taken along line XX in FIG. 1, FIG. 3 is an explanatory diagram of the outrigger device of the present invention, and FIG.
It is an explanatory view of a -Y cross-sectional view.

Claims (1)

[Scope of utility model registration request] an extending device consisting of an outer cylinder with a hollow polygonal cross section that is suspended horizontally on a vehicle; an inner cylinder that is telescopically fitted into the outer cylinder and has the same hollow polygonal cross section as the outer cylinder; An outrigger device comprising a hydraulic jack device consisting of an attached jack outer cylinder and a jack inner cylinder that is telescopically fitted into the jack outer cylinder via a hydraulic cylinder and has a leg plate swingably attached to its lower end, The jacking outer cylinder of the hydraulic jacking device is attached to the tip of the inner cylinder of the extending device so that the positional relationship in plan view between the swinging fulcrum of the leg plate of the hydraulic jacking device and the telescopic axis of the extending device is spaced apart in the longitudinal direction of the vehicle. An outrigger device characterized by: