JPH04169364A - Jack device for stabilizing vehicle - Google Patents

Abstract

PURPOSE:To compactly fold and store a jack device by reciprocating an inner case in an outer case as a screw bar is rotated, and rotating the outer case below a vehicle while a gear system serves as a fulcrum. CONSTITUTION:When a jack device 42 stably stabilizing a target vehicle 30 in the delivered state is to be folded and stored, a rotating means 27 is manually rotated, a worm wheel 25 is rotated via a worm gear 26, a screw bar 17 is rotated via bevel gears 23, 22, and an inner case 11 screwed in it is slid in the retracting direction into an outer case 14. A driving bar 36 is pressed and slid by the energizing force of a ground panel 13 toward the inner case 11, a rotary lever 31 is rotated, a driven bar 40 is folded and bent, the sliding of the inner case 11 in the retracting direction is continued, then the outer case 14 is stored in the horizontal state below the target vehicle 30.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention is applicable to trailer-1 vehicles such as communication satellite tracking vehicles, broadcasting vehicles, medical X-ray vehicles, and product display vehicles. This invention relates to a jacking device for stabilizing a vehicle, which allows the vehicle to stand still stably without rocking.

Conventional technology Traditionally, there have been efforts to make trailers separated from tractors independent, and to stably stop vehicles such as communication satellite tracking vehicles, broadcasting vehicles, medical X-ray vehicles, and product display vehicles. A jacking device was installed on the underside, and by extending the ground plane of this jacking device to the ground surface, it was possible to make the vehicle self-supporting and stable.

However, this conventional jacking device is
As in the publication described in No. 47227, a cylinder with a long stroke is fixed in the vertical direction, and a special telescopic tube is formed in addition to this cylinder.

This makes the structure extremely complicated, and the cylinder and telescopic tube protrude significantly from the underside of the vehicle even when the jacking device is not in use, making it impossible to store it compactly. In addition, a large installation space was required to install the jacking device, and when the vehicle was running, there was a risk of the vehicle getting caught on something protruding from the ground.

In other jacking devices using different methods, as shown in Fig. 4, the cylinder (2) cannot be stored compactly in the lower part of the vehicle (1), and the cylinder (2) installed on the underside of the vehicle (1) is ) is fixed to the upper surface of the loading platform (3) in a protruding state. Therefore, in such a method, it is time-consuming to install the jacking device (4), and the protrusion toward the loading platform (3) becomes an obstacle when loading cargo, etc.
This not only reduces the loading capacity and is uneconomical, but also has the drawback of poor workability.

Furthermore, this conventional jacking device requires a pressurizing device for the fluid supplied to the cylinder and a power source such as a battery to operate the pressurizing device, making the structure complicated and expensive. In addition, this jacking device requires a power source such as a battery, so it cannot be installed on some trailers and other vehicles that are not equipped with a power source.
Installation was limited to vehicles and had a narrow scope of application.

Problems to be Solved by the Invention The present invention attempts to solve the above-mentioned problems, and the present invention aims to solve the above-mentioned problems. To construct a jacking device that can be folded and stored compactly when not in use. Therefore, there is no need for the jacking device to protrude excessively from the underside of the vehicle, and the target vehicle can be stably brought to a standstill while enabling safe travel and ensuring sufficient loading space. Furthermore, by eliminating the need for a power source such as a battery, it can be installed in any vehicle, thereby expanding the range of vehicle applications.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a grounding plate to the ground surface at the tip of the inner case, and forms a screw rod that is screwed into the inner case in the axial direction. This inner case is slidably inserted into the outer case, and the screw rod is connected to the rotating means via a gear mechanism,
The inner case is formed to be slidable within the outer case by the screw rod rotated by the rotation means, and a rotary lever is pivotally supported by a fixed shaft on the side of the outer case, and the rotary lever is are provided protruding from both sides in the axial direction of the outer case, a driving rod is pivotally supported by a driving shaft at one end of the rotary lever, and the driving rod is pivotally supported so as to be movable forward and backward according to the sliding direction of the inner case, The other end of the rotary lever is supported by a driven shaft on a driven rod, and this driven rod is supported by a supporting shaft on a target vehicle located on the axial side of the outer case.As the screw rod rotates, the inner The case is movable back and forth within the outer case, and the outer case is formed to be rotatable around a gear mechanism on the underside of the target vehicle.

Function Since the present invention is configured as described above, it can be installed on the underside of a target vehicle such as a trailer, a communication satellite tracking vehicle, a broadcasting vehicle, a medical X-ray vehicle, or a product display vehicle, to keep the vehicle stably stationary. To fold and store the jacking device in the extended state, first turn the turning means by hand or the like, and then insert the screw rod connected to the turning means via a gear mechanism against the inner case. Rotate in the direction of screwing.

Due to this rotation, the inner case into which the screw rod is screwed,
It slides in the outer case in the contraction direction, and operates the grounding plate provided at the tip of the inner case in the retraction direction.

In the direction in which the grounding plate is moved in, a main moving rod that is pivotally supported so as to be movable back and forth is located, and the driving rod is pressed and slid by the biasing force of the grounding plate toward the outer case.

By this pressing and sliding movement of the driving rod, the driving rod, which is pivotally supported on the rotating lever by the driving shaft, rotates the rotating lever on the side surface of the outer case using the fixed shaft as a fulcrum.

To rotate this rotary lever around the fixed shaft, the driven rod, which is located in a straight line on the extension of the rotary lever, is folded and bent using the driven shaft as the fulcrum, and the gear mechanism is used as the fulcrum to rotate the fixed shaft in a circular arc. and a movement that causes the driven wheel to draw an arc using the spindle as a fulcrum. Therefore, the distance between the fixed shaft provided in the outer case and the support shaft of the target vehicle is narrowed. If the inner case continues to slide in the contraction direction, the outer case will further rotate using the gear mechanism as a fulcrum, and the outer case can be stored horizontally in the lower part of the target vehicle. In addition, this storage state is
Even if the rotational force applied to the rotating means is stopped, the gear mechanism interposed between the rotating means and the screw rod makes it possible to reliably stop the rotation of the screw rod, allowing the inner case to move freely. There is no possibility of the outer case being stretched or accidentally rotating.

In addition, in order to operate the jacking device in the stored state, contrary to the above, rotate the rotating means in the opposite direction and rotate the screw rod in the direction to unscrew it from the inner case. Slide the inner case in the extension direction, and let out the grounding plate at the tip of the inner case. By this operation of extending the ground contact plate, the biasing force in the contraction direction by the ground contact plate is released from the main driving rod. When the biasing force from this ground contact plate is released, the rotating lever connected to the driving rod will
It can be rotated around a fixed axis. The outer case, which is stored horizontally on the underside of the target vehicle, rotates in the direction of gravity using the gear mechanism as a fulcrum, and is suspended from the underside of the vehicle. In this hanging state of the outer case, the rotating lever and the driven rod connecting the fixed shaft and the supporting shaft are expanded to the maximum using the driven shaft as the fulcrum, and the outer case is stopped at a position perpendicular to the ground surface. do. Furthermore, even when the outer case is positioned vertically, the rotating means continues to rotate.
As the inner case continues to slide in the direction of extension due to the rotation of the screw rod, the inner case descends on the ground plane and presses this ground plane against the ground surface to stably hold the target vehicle. .

In this way, by configuring the jacking device installed at the bottom of the target vehicle so that it can be folded compactly and stored, the outer case does not protrude excessively from the underside of the vehicle. It is possible to ensure the stability of the target vehicle while ensuring safe driving and sufficient loading space. Since it can be operated manually, it does not require a power source such as a battery, and can be installed in any vehicle that does not have these means.

Embodiment Below, one embodiment of the present invention will be described with reference to the drawings.
1) is a hollow inner case formed of a square pipe, and has a grounding plate (13) at the tip thereof that connects to the ground surface (12). In addition, an outer case (14) that is inserted through the inner case (11) is formed by a square pipe that is slightly larger than the inner case (11), and the inner case (14) is inserted into the inner case (14).
1) The rotation can be stopped. A gear case (15) is connected to the base end of the outer case (14), and the screw rod (17) is rotated by a bearing (16) provided at the connection with the gear case (15). It is pivoted so that it can move.

This screw rod (17) is screwed into a screw groove (18) provided in the inner case (11), and by rotation of this screw rod (I7), the inner case (11) is inserted into the outer case (
14). Also, screw rod (17)
A screw end (20) is provided at the tip of the screw to prevent separation from the threaded groove (18).

Further, this screw rod (17) is connected to a gear mechanism (21). This gear mechanism (21) forms a pair of bevel gears (22) and (23) in a gear case (15), and one bevel gear (22) has a main shaft that passes through the side surface of the gear case (15). (24)
A worm wheel (25) is connected to one bevel gear (23) via this main shaft (24). Then, a worm gear (26) that fits with this worm wheel (25) is provided, and this worm gear (25) is fitted with a worm gear (26).
6) to a rotating means (27) such as a knob, the screw rod (17) can be rotated.

Further, a main shaft (24) of the gear mechanism (21) and a fixing pin (28) provided on the axial extension line of this main shaft (24).
and the fixing bracket (4) fixed to the underside of the target vehicle (30).
4), the outer case (1
4) is rotatable on the underside of the target vehicle (30).

Further, a rotary lever (31) is supported by a fixed shaft (32) on the side surface of the outer case (14).

This rotating lever (31) forms one protruding piece (33) and the other protruding piece (34) that protrude from both sides of the outer case (14) in the axial direction. This protruding piece (33)
is formed shorter than the other protruding piece (34), and this one protruding piece (33) is pivotally supported by the main drive shaft (35) on one end of the main drive rod (36), and the other part of the main drive rod (36) the edge,
A guide (3) fixed to the outer peripheral surface of the outer case (14)
7), and pivotally supports the driving rod (36) so that it can move forward and backward.

Further, the negative end of the other protruding piece (34) located on the opposite side of the fixed shaft (32) from the one protruding piece (33) is pivotally supported on the driven rod (40) by the driven shaft (38). .

Then connect one end of this driven rod (40) to the outer case (
The inner case (11) is supported by a support shaft (41) on the target vehicle (30) located on the axial side of the inner case (14).
) is formed to be rotatable about the main shaft (24) on the lower surface of the target vehicle (30) as the outer case (14) moves forward and backward.

In addition, in this embodiment, the jacking devices (42) (42) attached to the left and right lower surfaces of the target vehicle (30) are connected to the connecting shaft (42) (42) that connects the worm gears (26) (26).
3), the left and right jacking devices 11F (/12) (42) are connected by one rotation means (27).
can be operated simultaneously.

In the configuration as described above, the target vehicle (such as a communications satellite tracking vehicle, a broadcasting vehicle, a medical X-ray vehicle, a product display vehicle, etc.)
In order to fold and store the jacking device f (42) (42) installed on the fixing bracket (44) on the lower surface of 30) and keeping the target vehicle (30) stably stationary in the extended state,
First, the rotating means (27) is rotated by hand or the like.

When the rotation means (27) is rotated, the worm wheel (25) is rotated via the worm gear (26) connected to the rotation means (27). rotates the other bevel gear (23) via the main shaft (24). Also, since this bevel gear (23) rotates one bevel gear (22), the screw rod (17) connected to this one bevel gear (22) is rotated in the direction of screwing into the inner case (11). move.

Due to this rotation, the inner case (11) into which the screw rod (17) is screwed slides in the retracting direction within the outer case (14), and the grounding plate ( 13) in the retracting direction. The outer case (
The main drive rod (36), which is supported by the guide (37) of 14) so as to be movable and retractable, is positioned, and the main drive rod (36) is pressed and slid by the biasing force of the grounding plate (13) toward the inner case (11). let

This sliding of the main drive rod (36) causes the rotation lever (31
) is the outer case (14) with the fixed shaft (32) as the fulcrum.
) rotates on the side. And this rotating lever (31)
The fixed shaft (32) is the fulcrum and rotation is performed using the rotation lever (3
The driven rod (40) located in a straight line on the extension of the main shaft (2) is folded and bent using the driven shaft (38) as a fulcrum.
4) to make the fixed shaft (32) draw an arc using the supporting shaft (41) as a fulcrum, and to make the driven shaft (38) draw an arc using the support shaft (41) as a fulcrum. Therefore, the distance between the fixed shaft (32) provided on the outer case (14) and the support shaft (41) of the target vehicle (30) is narrowed.

If the inner case (11) continues to slide in the feeding direction, the inner case (11) will rotate around the main shaft (24) and the outer case (14) will be placed under the target vehicle (30). Can be stored horizontally. This stored state can be achieved by stopping the rotation of the screw rod (17) that operates the inner case (11).
1) will not extend out without permission or the outer case (14) will not rotate inadvertently.

Also, contrary to the above, the jacking device (42
) in the opposite direction to the above.
When the screw rod (17) is screwed out from the inner case (11), the outer case (14)
The inner case (11), which is in a drawn-in state, is slid in the drawing-out direction, and the grounding plate (13) at the tip of the inner case (11) is drawn out.

By this operation of extending the grounding plate (13), the main drive rod (36
) is released from the urging force in the drawing-in direction by the grounding plate (13). When the biasing force from the ground contact plate (13) is released, the rotary lever (31) connected to the main drive rod (36) becomes rotatable about the fixed shaft (32). The outer case (14), which was stored horizontally on the lower surface of the target vehicle (30), rotates in the direction of gravity about the main shaft (24) as a fulcrum, and is suspended from the lower surface of the target vehicle (30).

When the outer case (14) is in a suspended state, the rotary lever (31) connecting the fixed shaft (32) and the support shaft (41)
) and the driven rod (40) are expanded to the maximum using the driven shaft (38) as a fulcrum, and the inner case (11) is placed on the ground surface (12).
Stop at a position perpendicular to . Furthermore, even when the outer case (14) is positioned vertically, the inner case (11) continues to slide in the feeding direction, so the inner case (11) is placed on the ground plane (13). The target vehicle (30) can be stably stopped by lowering the ground plane (13) and pressing it against the ground surface (12).

Effects of the Invention Since the present invention is configured as described above, when storing a jacking device installed in the lower part of the target vehicle,
Since the jacking device can be folded compactly and stored, it will not come into contact with any protrusions on the ground while driving. It is possible to obtain reliable stability.

In addition, since it can be operated manually, it does not require a power source, hydraulic system, etc. for a vehicle or sotery, and can be installed in any vehicle that does not have these means.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view, FIG. 2 is an enlarged partially cutaway side view, FIG. 3 is a front view showing the state installed in a vehicle, and FIG. 4 is a front view. FIG. 2 is a side view showing a conventional example. (11)・Inner case (12)・・・・Ground surface (13)・・・・Ground plate (14)・Outer case (17)・・・Screw rod (21)・・・Gear mechanism (27)...Rotating means (30)...Target vehicle (31)...Rotating lever (32)...Fixed shaft (35)...Main shaft (26) )... Main drive rod (38)... Driven shaft (40)... Driven rod (41)... Support shaft

Claims (1)

[Claims] (1) A grounding plate to the ground surface is provided at the tip of the inner case, a screw rod is formed that is screwed into the inner case in the axial direction, and the inner case is slidably inserted into the outer case, and the screw rod is screwed into the outer case. The rod is connected to a rotation means via a gear mechanism, and the inner case is formed to be slidable within the outer case by the screw rod rotated by the rotation means. A rotary lever is pivotally supported by a fixed shaft, this rotary lever is provided protruding from both sides of the outer case in the axial direction, a main drive rod is pivotally supported at one end of this rotary lever by a main drive shaft, and this drive lever is
It is pivoted so that it can move forward and backward depending on the sliding direction of the inner case, and the other end of the rotating lever is pivoted on a driven shaft with a driven shaft.
By supporting this driven rod with a spindle on the target vehicle at a side position in the axial direction of the outer case, the inner case can move forward and backward within the outer case as the screw rod rotates, and the outer case can also be attached to the target vehicle. A jack device for stopping a vehicle, characterized in that the lower surface of the vehicle is rotatable using a gear mechanism as a fulcrum.