JPS604472A - Mounting structure for spare tire - Google Patents

Abstract

PURPOSE:To prevent deformation of a fuel tank due to the spare tire when impact force is applied to a vehicle by a method wherein a bolt, whose knob is separated from the shaft section thereof when a pulling force stronger than a given value is applied, is used to attach the spare tire to a trunk chamber. CONSTITUTION:The spare tire 5 is accommodated in a recess 3 formed at the bottom of the trunk chamber 2 at the rear part of the vehicle 1. The bolt 8 is penetrated through one of the mounting holes 7 for attaching the tire to an axle hub, which are formed on the wheel of the spare tire 5, while the tire 5 is fixed to the body of the vehicle by screwing the bolt 8 into a nut 9 provided in the recess 3. The bolt 8 is formed by a shaft 10 and the knob 11 so that the knob 11 is pulled out of the shaft 10 when a predetermined pulling force is applied to the knob 11. According to this method, the fixing of the spare tire 5 by the bolt 8 is released when the impact force F is applied to the vehicle 1. Accordingly, the deformation of the fuel tank 4 due to the spare tire 5 may be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spare tire mounting structure within the trunk of a vehicle.

Spare tires are generally stored in the trunk of a vehicle. For example, a recess is formed in the bottom of the trunk to accommodate the tire, the tire is inserted into the recess, and a bolt is passed through a bolt insertion hole formed in the wheel to secure it to the vehicle body. In this way, the spare tire will not vibrate or jump up in the trunk room while driving, but if a strong impact force is applied from the rear of the vehicle, such as in a rear-end collision, the spare tire will not vibrate or jump up. acts as a reinforcing material for the bottom of the trunk, so the bottom of the trunk does not deform, and the impact force is directly transmitted to the fuel tank in front of the trunk, potentially deforming the fuel tank.

In other words, the installation structure of the Avey Tire allows the spare tire to be securely fixed in the trunk without wobbling during normal driving, and also allows the spare tire to be securely fixed in the trunk when a large impact force is applied from the rear. It is preferable that the impact force be absorbed by the deformation of the trunk room without acting as a reinforcing material. The present invention has been made to achieve this object, and a feature of the present invention is that when a bolt for fixing a spare tire is applied, the knob of the bolt is fixed to the shaft of the bolt when a pulling force of more than a predetermined value is applied. The spare tire is made free by using a tire that can be separated from the tire by an impact force exceeding a predetermined value.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view of the rear part of a vehicle to which the mounting structure according to the present invention is applied, and FIG. 2 is a perspective view showing the inside of a trunk room.

A trunk room 2 is provided at the rear of the vehicle 1, a circular recess 3 is formed at the bottom of the trunk room 2, and a fuel tank 4 is supported at the lower part of the vehicle body in front of the recess 3. A spare tire 5 is housed in the recess 3, and by screwing the spare into a nut 9 provided approximately in the center of the recess 3, the spare tire 5 is fixed to the vehicle body. Ru.

As shown in FIG. 3, the bolt 8 consists of a steel shaft 10 and a resin knob 11, and a male thread 12 is carved in the tip half of the shaft 10, as shown in FIG. As shown in FIG. 5, a knurled portion 13 is formed, and a rib 14 is formed around the knob 11 for manual attachment and removal, and an opening is formed in the center of the lower surface as shown in FIG. A hole 15 is formed in which the knurled portion 1 is inserted.
By inserting 3, it becomes bolt 8. In addition, when fitting the knurling part 13 into the hole 15 of the knob 11, the shaft part 1
The knob 11 and the knurling part 13 are welded by heating the knurled part 0 or by heating the fitting part after fitting, and the knob 11 is heated, for example, from 9 to 100 to 140.
The knob 11 is made to be pulled out from the shaft portion 13 when a pulling force of Kq is applied.

In the above, an impact force F acts from the rear of the vehicle 1 as shown in FIG. As a result, the knob 11 is pulled out from the shaft portion 10, and as a result, the spare tire 5 becomes free and pops out from the four portions 3, as shown by the imaginary line in the figure. Therefore, the luggage compartment 2 absorbs the impact force and the spare
Deformation of the fuel tank 4 due to the tires can be avoided.

Note that the above is an example of the implementation of the present invention, and in the illustrated example, the knurled portion 13 is
is formed, and the knob 11 is externally fitted and welded to this knurled portion 13. However, a rib may be provided on the shaft portion 10 and the rib and the knob may be welded. Furthermore, the knob and the shaft portion may be integrated. A part of the shaft may be formed into a small diameter part, and the small diameter part may be broken by applying a predetermined impact force. In short, it is sufficient that the bolt shaft and the knob separate when a predetermined impact force is applied.

As is clear from the above description, according to the present invention, the spare tire can be securely held without rattling during normal driving without any changes to the structure of the conventional trunk compartment, and moreover, in the event of a rear-end collision. When a large impact force is applied from the rear of the vehicle, the spare tire is immediately freed, the impact force is absorbed by the trunk compartment, and the fuel tank in the front of the trunk compartment is prevented from deforming. Demonstrate.

[Brief explanation of the drawing]

Fig. 1 is a side view of the rear of a vehicle to which the spare tire mounting structure according to the present invention is applied, Fig. 2 is a perspective view of the interior of the trunk, Fig. 3 is an overall view of the bolt, and Fig. 4 shows the bolt shaft. The figure shown, FIG. 5, is a bottom view of the knob. In the drawings, 5 is a spare tire, 8 is a bolt, 10 is a bolt shaft, 11 is a knob, and 13 is a knurled portion. Patent Applicant Honda Motor Co., Ltd. Agent Patent Attorney 2) Part 1 Patent Attorney Kuni Ohashi Intention Patent Attorney Yu Koyama

Claims (2)

[Claims] (1) A frame attachment structure for a spare tire, characterized in that the spare tire is mounted in the trunk room at the rear of the vehicle using a bolt that separates the knob from the shaft when a certain amount of pulling force is applied. (2) The spare tire mounting structure according to claim 1, wherein the knob is made of resin and is externally welded to a knurled portion formed at one end of the bolt shaft. .