JPH07172781A - Jack device for automobile - Google Patents

Abstract

PURPOSE:To make a jack have stability to the full in dispensing with its setup spot in a car room by adding its function to a spare tire carrier. CONSTITUTION:A case 2 is installed on a base 1 of a spare tire carrier. In addition, a worm 3, a worm gear 4 and a lifting shaft 5 are all built-in an inner part of this case 2. A wheel support part 6 is installed in a tip part of this lifting shaft 5. With the worm 3 rotated in an A direction, the worm gear 4 rotates in a B direction. The lifting shaft 5 moves in a C direction by rotation of the worm gear 4, and thereby the wheel support part 6 is displaced to some extent. The case 1 is used as a jack base, and the wheel support part 6 is used as a jack's body grounding part. Therefore, the spare tire carrier filfills its function as a jack.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jack device for an automobile, which is an improved spare tire carrier for mounting an automobile spare tire to the outside of a vehicle.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a spare tire is mounted on a vehicle by a base of a spare tire carrier 11.
A disc-shaped wheel support 13 is provided on the wheel 12, and the wheel 14 is mounted on the wheel support 13.

Further, as shown in FIG. 8, the jack has a shape similar to that of a pantograph, and is folded and mounted in a vehicle compartment with a storage space secured. The method of mounting the jack inside the vehicle has the following drawbacks. First, in order to consider the storability in the passenger compartment, it is necessary to make the base portion 14 and the vehicle body grounding portion 15 small and to fold the whole body small. However, if the base part 14 and the vehicle body grounding part 15 are made too small, or if the small folded jack is extended greatly, it will lack stability. Therefore, in order to balance the two, it was sometimes necessary to make the jack larger at the expense of the space inside the vehicle.

[0004]

In the method of storing the jack in the vehicle compartment as described above, it is difficult to balance the contradictory factors of the stability of the jack and the sacrifice of the interior space. In addition, the spare tire carrier has only the function of mounting the tire.

The present invention has been made in view of the above problems, and by adding a structure that can be used as a jack to a spare tire carrier, it is possible to eliminate the need for a jack installation place in the vehicle compartment and to use it as a jack. A jack device for an automobile having a structure having sufficient stability.

[0006]

Means for Solving the Problems According to the present invention for solving the above-mentioned problems, a base and a wheel support portion of a spare tire carrier for holding a spare tire outside a vehicle compartment are provided so as to be spaced apart from each other. It is a thing.

Further, the wheel supporting portion is used as a vehicle body grounding portion of the jack, and the wheel supporting portion is provided with a vehicle body supporting claw.

[0008]

By providing the base of the spare tire carrier and the wheel support so as to be spaced apart from each other, the spare tire carrier has a jack function. Further, since the wheel support portion, which is a component of the tire carrier, is used as the vehicle body grounding portion of the jack, the vehicle body supporting claw having a sufficient size can be provided on the grounding portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 3 is an overall view of a spare tire carrier. The internal structure will be described with reference to FIGS. A case 2 is provided on a base 1 of the spare tire carrier. Inside the case 2, a worm 3, a worm gear 4 and a lifting shaft 5 are built.
The worm 3 is axially supported by the case 2 and meshes with the worm gear 4.

The worm gear 4 is supported by the case so as not to move in the left-right direction in FIG. The inner cylindrical portion of the worm gear 4 is provided with a thread groove, which meshes with the thread groove provided on the elevating shaft 5. A wheel support portion 6 is provided at the tip of the lifting shaft 5. The wheel support portion 6 is provided with an embedded bolt 7 for wheel support and a vehicle body support claw 8 that functions when used as a jack. Further, a stopper 5a is provided at the rear end of the lifting shaft 5 to prevent the lifting shaft 5 from coming off. Furthermore, the lifting shaft 5
Is provided with a key groove 5b, and rotation is prevented by a key 2a fixed to the case.

The apparatus thus constructed operates as a jack by the following operation. The crank rod 8 is inserted into the worm 3 and the worm 3 is rotated in the A direction. The worm gear 4 meshing with the worm 3 rotates in the B direction. Movement of the elevating shaft 5 in the rotational direction is restricted by the key 2a. The thread groove of the inner cylinder of the worm gear 4 meshes with the thread groove of the lifting shaft 5. Therefore,
The lifting shaft 5 moves in the C direction by the rotation of the worm gear 4,
The wheel support 6 provided at the tip of the lifting shaft 5 is shown in FIG.
Displace as shown in (b).

As shown in FIG. 4, the base 1 is usually fixed to a rear gate of a car or the like, and the spare tire is fixed to the wheel supporting portion 6 to function as a spare tire carrier. However, as shown in FIG. 5, when the base 1 is used as the base of the jack and the wheel support portion 6 is used as the vehicle body grounding portion of the jack, the spare tire carrier functions as a jack by adding the above operation. .
At this time, it is fixed to the vehicle body by the vehicle body supporting claws 8 provided on the wheel supporting portion 6.

With the above construction, the spare tire carrier has a jack function, and it is not necessary to store the jack in the vehicle compartment. or,
Since the wheel supporting portion, which is a component of the tire carrier, serves as the vehicle body grounding portion of the jack, the vehicle body supporting claw having a sufficient size can be provided on the grounding portion.

Next, a second embodiment of the present invention will be described with reference to FIG. The difference of this embodiment from the first embodiment is that in this embodiment, the operation of the lifting shaft 5 is performed using the bevel gears 9 and 10. In other parts, the same parts as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

The bevel gear 9 is pivotally supported on the case 2. The bevel gear 10 is supported by the case 2 so as not to move in the left-right direction in FIG.

In the case of this embodiment, the crank bar 8 is inserted into the bevel gear 9, and the bevel gear 9 is moved by the crank bar 8
Rotate in the direction. Bevel gear that meshes with bevel gear 9
10 rotates in the E direction. The movement of the elevating shaft 5 in the rotational direction is restricted by the key 2a, and the groove of the inner cylindrical portion of the bevel gear 10 meshes with the thread groove of the elevating shaft 5, so that the bevel gear 10 rotates in the C direction. Therefore, the wheel support portion 6 provided at the tip of the elevating shaft 5 makes the same displacement as that shown in FIG.

The second embodiment thus constructed can also obtain the same effects as the first embodiment.

[0018]

As described above, the present invention has the following effects. Since the jack also serves as a tire carrier outside the vehicle compartment, it is not necessary to provide a jack storage space inside the vehicle compartment.

It is not necessary to design the size of the jack in consideration of the storability of the jack in the vehicle compartment.

Further, since the wheel support portion, which is a component of the tire carrier, is used as the vehicle body grounding portion of the jack, and the vehicle body supporting claw of a sufficient size is provided at the grounding portion, the vehicle body may be displaced during jacking up. Without, it can be stably supported.

Since the base of the tire carrier can be used as it is as the base of the jack, it becomes a base of sufficient size, and the grounding place is not selected.

Further, since the rigidity of the constituent members can be set higher than that of a jack having a shape similar to a pantograph, it can be used in a heavy vehicle.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of essential parts of a tire carrier showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line-in FIG. 1 (b).

FIG. 3 is an overall view of a tire carrier showing a first embodiment of the present invention.

FIG. 4 is a diagram showing a state in which the tire carrier according to the first embodiment of the present invention is mounted on a vehicle body.

FIG. 5 is a state diagram when the tire carrier according to the first embodiment of the present invention is used as a jack.

FIG. 6 is a schematic sectional view showing an essential part of a tire carrier according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram of a conventional tire carrier.

FIG. 8 is a schematic diagram of a conventional jack.

[Explanation of symbols]

 1 base 6 wheel support 8 car body support claws

Claims (2)

[Claims] 1. A jack device for an automobile, characterized in that a base and a wheel support portion of a spare tire carrier for holding a spare tire outside a vehicle compartment are provided so as to be spaced apart and approachable. 2. The jack device for an automobile according to claim 1, wherein the wheel supporting portion of the spare tire carrier is provided with a claw for supporting the vehicle body.