JPH062011Y2 - Mudguard mounting structure - Google Patents

Description

[Detailed Description of the Invention] a. Field of Industrial Application The present invention relates to improvement of bolt holes for mounting resin molded parts.

b. Conventional Technology and Its Problems Resin molded parts are widely used in automobiles and the like, and various resin molded parts are also used in, for example, the so-called saddle type four-wheeled vehicle 1 shown in FIG. As a specific example, the mudguard 2 is made of a resin molded component, and the mudguard 2 is attached to the lower end portion of the front fender 3 by a plurality of bolts 4.

By the way, the mudguard 2 may receive an impact force in the direction of the arrow a in FIG. 3 due to a collision with an obstacle such as a stone on the road. In this case, the mounting surface of the mudguard 2 may be parallel to the traveling direction of the vehicle. Unnecessary force is likely to be applied to the upper fixed part of the attached part. More specifically, when an impact force in the direction of arrow a acts on the mudguard 2 in FIG. 4, the mudguard is inserted through an insertion hole of the bolt 4 formed in the mudguard 2 (in FIG. 3, hidden from the front fender 3 and the bolt 4 and not visible). 2 Cracks 5 are easily formed toward the upper edge 2a.

It is considered that the reason why the crack 5 is likely to occur is that stress is concentrated around the insertion hole of the bolt 4.

The present invention has been devised to effectively solve the above-mentioned problems, and its purpose is to reduce stress concentration around the mounting bolt holes in a resin molded part having relatively weak strength. This is to prevent damage to the resin molded parts.

c. Means for Solving Problems In order to solve the above-mentioned problems, the present invention provides a resin mudguard mounting structure in which bolts are inserted in the vehicle width direction and fastened to the vehicle body. A slit is formed which opens in the radial direction of the hole and at the upper edge of the mudguard.

d. Action In the mounting bolt hole configured as described above, since the bolt hole is opened at the slit part, the elasticity around the bolt hole is enhanced, and therefore even if an unreasonable force is applied to the periphery of the bolt hole, it is excessive. Does not cause stress concentration.

e. Embodiment An embodiment in which the present invention is applied to a mounting bolt hole of a mudguard of a saddle type four-wheeled vehicle will be described below with reference to the drawings.

As shown in FIGS. 1 and 2, in the present invention, slits 7 are respectively communicated with two bolt holes 6 formed at the upper end of the mudguard 2. The slit 7 extends to the upper edge 2a of the mudguard 2 and is opened there, so that the elasticity in the arrow direction in FIG. 1 around the bolt hole 6 is enhanced. The width of the slit 7 is preferably 1/2 to 1/3 of the diameter of the bolt hole 6. As shown in FIG. 2, the other bolt hole 8 of the mudguard 2 is a conventional bolt hole because it is relatively hard to crack.

In the bolt hole 6 configured as described above, when an impact force in the direction of arrow a in FIG. 1 acts on the mudguard 2, stress is generated around the bolt hole 6. However, since the bolt hole 6 is opened at the slit 7, a relatively large elasticity is generated around the bolt hole 6, so that the stress concentration around the bolt hole 6 is relaxed and the occurrence of cracks is prevented. be able to.

f. Effect of the Invention As described above, in the present invention, since the slit is made to communicate with the mounting bolt hole of the mudguard, the elasticity around the bolt hole can be enhanced, and therefore the impact force acts on the resin molded part. Also, stress concentration around the bolt holes can be relieved, and thus damage such as cracking around the bolt holes can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a side view of the upper end of a mudguard showing an embodiment of the present invention, FIG. 2 is an exploded perspective view of the mudguard, FIG. 3 is a side view of a conventional saddle-ride type four-wheel vehicle, and FIG. FIG. 4 is an enlarged side view of the upper end of the mudguard of FIG. 3. 2 ... Mudguard, 3 ... Front fender, 4 ... Bolt, 6 ... Bolt hole, 7 ... Slit.

Claims (1)

[Scope of utility model registration request] 1. A mounting structure for a resin mudguard in which a bolt is inserted in the width direction of a vehicle and fastened to a vehicle body,
A mudguard mounting structure, wherein a slit is formed in the bolt hole of the mudguard in the radial direction of the hole and at the upper edge of the mudguard.