JPH11115832A - Spare tire carrier device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability of a fastening part at the time of off-road traveling by pinching a main pipe with a pair of spacers having a projecting and a recessed parts corresponding to a nearly cross sectional outline of the main pipe between the main pipe and a carrier bracket, and mechanically fastening them with a bolt and a nut. SOLUTION: A main pipe 3 and a carrier bracket 5 are fastened to each other by pinching them from over and lower with a spacer having a recessed part corresponding to the cross section of the main pipe, and inserting the main pipe 3 into a U-shaped fitting part provided in the carrier bracket 5, and passing a bolt through holes previously provided in a carrier bracket fitting part, the spacer and the main pipe 3, and fastening the bolt with a nut. The spacer and the main pipe 3 are held by the surface pressure to be generated by the axial force at the time of fastening the bolt. In order to securely fix them, a fine clearance is provided between two spacers for plastic deformation by the axial force at the time of fastening so as to prevent the rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier device for detachably supporting a spare tire on an outer surface of a rear door of an automobile.

[0002]

2. Description of the Related Art The structure of a spare tire carrier of this type is disclosed in, for example, Japanese Utility Model Laid-Open No. 3-24484 and Japanese Utility Model Laid-Open No.
No. 104486 is disclosed. It is composed of a main pipe whose terminal is rotatably supported in a horizontal direction on a hinge portion provided at the rear portion of the vehicle, and a carrier bracket for detachably supporting a spare tire.

In this case, a vertical pipe is welded to a bent main pipe and a carrier bracket is welded to the vertical pipe, or a carrier bracket is directly welded to the main pipe.

[0004]

However, a vehicle to which the spare tire carrier device is mounted is generally premised on off-road traveling, and therefore, a large impact is repeatedly applied when traveling on a rough road. . Therefore, although strength is required to withstand the stress, in the case of the conventional structure, stress concentrates on the welded portion.

[0005] Further, generally used welding is arc welding, and since the welded portion is exposed to a high temperature, the strength of the heat-affected zone is lower than that of the base metal. Therefore, there has been a technical problem in which the periphery of the weld is destroyed first.

Accordingly, an object of the present invention is to provide an inexpensive spare tire carrier device that can sufficiently withstand durability against off-road running.

The technical means taken to solve the above-mentioned technical problem is that, when the carrier bracket is connected to the main pipe, a pair of upper and lower concave shapes matching the general cross-sectional outer shape of the main pipe are provided between the main pipe and the carrier bracket. Is mechanically fastened with bolts and nuts or the like.

The above technical means works as follows.
At the part where the carrier bracket is connected to the main pipe, it is sandwiched by a pair of upper and lower concave spacers that match the cross-sectional shape of the main pipe, and the contact surface is increased by mechanically fastening with bolts, nuts, etc. Such a force can be dispersed. This allows
The critical load for breaking can be increased.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 shows a rear portion of a vehicle equipped with a spare tire carrier device. The spare tire carrier device 2 is mounted on the rear part 1 of the vehicle. The spare tire carrier device 2 includes a main pipe 3 and a hinge device 4 for fixing the carrier bracket 5 and the carrier frame 3 to the vehicle so as to be rotatable with respect to the vehicle.

The spare tire 10 is fixed to the carrier bracket 5. As shown in FIG. 3, the fastening portion between the main pipe 3 and the carrier bracket 5 sandwiches the main pipe 3 from above and below with a spacer 6 having a concave shape corresponding to the cross section of the main pipe, and 5a, 5b provided on the carrier bracket 5. The bolts 7 are inserted into the U-shaped mounting portions, and the bolts 7 are passed through holes provided in the carrier bracket mounting portions 5 a and 5 b, the spacer 6, and the main pipe 3 in advance, and tightened with the nuts 8.

The spacer 6 and the main pipe 3 are
It is held at the surface pressure generated by the axial force at the time of bolt tightening.

In order to securely fix, as shown in FIG.
A small gap x is provided between the two spacers 6,
It is plastically deformed by the axial force at the time of bolt tightening to prevent rotation.

As another example, as shown in FIG. 6, there is a method in which an adhesive is applied between the spacer 6 and the main pipe 3 and fixed. The main pipe 3 and the spacer 6
When an aluminum material is used, it is also possible to heat cure the adhesive simultaneously by artificial aging.

As another example, as shown in FIG. 7, if an aluminum extruded material is used for the main pipe 3, an oval pipe material can be easily manufactured. In this case, a special rotation stopper as in the above two examples is not required.

[0015]

As described above, according to the present invention,
By increasing the strength of the mounting part of the main pipe and carrier bracket, which has been the most neck in terms of strength,
The main pipe itself can be minimized to ensure rigidity.

Therefore, the weight of the spare tire carrier device can be reduced, and the running resistance on bad roads can be improved.

[Brief description of the drawings]

FIG. 1 shows the right half of the rear part of a vehicle equipped with the spare tire carrier device of the present invention.

FIG. 2 shows the entirety of a spare tire carrier device.

FIG. 3 shows an AA cross section of FIG.

FIG. 4 is a perspective view showing the mounting member shown in FIG. 3;

FIG. 5

FIG. 6

FIG. 7 shows an example of fixing the main pipe and the tire carrier.

FIG. 8 shows a conventional example.

[Explanation of symbols]

 1 ···· Vehicle rear part 2 ···· Spare tire carrier device 3 ···· Main pipe 3a ··· Vertical pipe 4 ··· Hinge Device 5 ···· Carrier bracket 5a, 5b ··· Carrier bracket mounting part 6 ···· Spacer 7 ···· Bolt 8 ····· Nut 9 ·・ ・ ・ ・ ・ ・ Washer 10 ・ ・ ・ ・ ・ ・ Spare tire

Claims (1)

[Claims] 1. A spare tire carrier device for detachably holding a spare tire on an outer surface of a rear door of an automobile, wherein a carrier bracket is attached to a main pipe via a spacer having a concave shape conforming to an outer shape of the main pipe. A spare tire carrier device which is mechanically fastened.