JPH0324402Y2 - - Google Patents

Description

[Detailed description of the invention] "Purpose of the invention" This invention relates to the invention of a wheel for an assembly type vehicle.
A vehicle wheel constructed of an assembled structure has a good appearance, reduces the buildup of mud, etc., makes the braking mechanism work effectively, contributes to safe driving, and is stable and strong. It is possible to form a completely assembled state.

(Industrial application field) Assembly type vehicle wheels.

(Prior Art) It has been generally known that a vehicle wheel has an assembly structure in which a disk portion and inner and outer rim portions are manufactured separately, and these members are assembled to form a wheel disk. That is, by adopting such an assembly structure, it is possible to easily manufacture each part, and it is possible to employ a three-dimensional wheel disk that secures the required strength relationship relatively easily by using a cast body. By the way, in the case of such an assembly type, it is necessary to tighten bolts and nuts in order to assemble each member, and in this case, the bolts and nuts used are at least rectangular ones that are generally used for nuts. There is.

Furthermore, Japanese Utility Model Application Publication No. 57-19211 proposes making the nuts and bolts heads semispherical and having a box spanner fitting groove recessed therein.

Further, Japanese Patent Publication No. 53-22321 describes the provision of a cap flange whose outer end face is dish-shaped on the head of a bolt (shank) for fastening members of a vehicle wheel.

(Problems to be Solved by the Invention) In the above-mentioned conventional nut using the conventional square nuts, many of the square nuts have corners protruding from the disk surface, which makes it easy for mud etc. to stick and harden when the vehicle is running. It is not easy to clean, and the plating is peeled off and damaged by wiping for cleaning, making it impossible to maintain a desirable appearance.
Furthermore, such an angular nut is undesirable from the viewpoint of safe driving of a vehicle, since it becomes an obstruction at the rim base, which is important when a brake or the like is pressed against the rim, and prevents the braking mechanism from working properly.

In the above-mentioned Utility Model Publication No. 57-19211, the box spanner fitting groove for tightening operation has to be greatly recessed in the outer end surface of the nut and bolt, so this is not suitable for vehicle wheels. When used in the assembly of box spanners, mud and other substances tend to adhere to and harden in the box spanner fitting grooves.

In addition, as shown in the figure, the product of Japanese Patent Publication No. 53-22321 adopts a square nut similar to the conventional one, and the same problems as those of the conventional ones mentioned above remain with respect to this square nut. do not have.

"Structure of the invention" (Means for solving the problem) The present invention was devised after repeated studies in view of the above-mentioned circumstances. The proximal end of the rim member is joined to the formed joint seat and tightened with a bolt, in which a rectangular recess is formed in the center of the circular head of the bolt, and the bolt head is attached to the joint seat. A fitting hole is formed to receive the bolt, and a conical surface is formed on the outer end surface of the nut that is screwed and tightened with this bolt, and a stepped part that fits into the fitting hole of the rim member is integrally formed. This project proposes an assembly-type vehicle wheel with distinctive features.

(Function) By forming a rectangular recess in the circular head of the bolt, the bolt can be screwed into the nut and tightened by rotating the bolt in the circular head.

By forming a fitting hole for receiving the head of the bolt in the joint seat of the disk member, the protrusion of the bolt head from the joint seat is greatly reduced or eliminated.

By making the outer end surface of the nut a conical surface,
The amount of nut protrusion at the base of the rim member is reduced, no corners are left in this area, the adhesion of mud etc. is reduced and cleaning is facilitated, and the pressure contact of the brake etc. against the base of the rim member is prevented. Reduce. By integrally forming the step part that fits into the fitting hole of the rim member on the nut, the gap between the nut and the rim member is reduced to form a stable and strong assembly relationship, and the rim member The frictional resistance between the bolt and the nut is increased to facilitate threading and tightening of the bolt.

(Example) To explain a specific embodiment of the present invention shown in the attached drawings, a disk member 1, an inner rim member 2, and an outer rim member 3 are manufactured separately, and the joints formed on the disk member 1 are seat 4
The process of joining the proximal ends of the rim members 2 and 3 to each other and tightening them with the bolts 5 is similar to the conventional method described above, but in the present invention, the head 5a of the bolt 5 is A rectangular recess 15 for operation is formed, and a fitting hole 14 for receiving the head 5a is formed in the joint seat 4, and a nut 6 that is screwed onto such a bolt 5 and tightened is formed on the outer end surface. The nut 6 is provided with a fitting hole 20 in the inner rim portion 2.
A stepped portion 6b that is fitted inside is integrally formed at the bottom.

According to the present invention as described above, the rim member and the disc member are formed separately, and the proximal end of the rim member is joined to the joint seat formed on the disc part and tightened with a bolt, so that each Although it is clear that the parts can be manufactured easily,
A rectangular recess 15 for rotational operation is formed in the circular head 5a of the bolt 5, and the head 5a is accommodated in a fitting hole 14 formed in the joint seat 4 of the disk member 1. Since the bolt head 5a is a type of bolt, a protruding corner is not formed on the bolt head 5a, and on the other hand, the nut 6 that is screwed onto and tightened with the bolt 5 has an outer end surface formed into a conical surface 16. Therefore, the amount of the nut protruding from the proximal surface of the rim member is small, and there is no corner formed in this area, which reduces the possibility of mud and dirt adhering to and solidifying in this area, and also improves cleanliness. Not only does it have the advantage of being easy to wipe and less damage to the plating layer, but it also eliminates the angular protrusion on the base end of the rim as described above. The nut 6 has a stepped portion 6 that fits into the fitting hole 20 of the rim member.
b is integrally formed, there is little gap left between the nut 6 and the rim member, and a stable assembly relationship can be formed, and the relationship between the nut 6 and the rim member when the bolt 5 is screwed in is It has the effect of increasing the frictional resistance between the screws and achieving smooth screw tightening, and is a highly effective device in practical terms.

[Brief explanation of the drawing]

The drawings show embodiments of the invention,
FIG. 2 is a sectional view showing a tightening assembly portion between a vehicle wheel, a rim member, and a disc member according to the present invention. However, in this drawing, 1 is a disk member,
2 is an inner rim member, 3 is an outer rim member, 4 is a joint seat, 5 is a bolt, 6 is a nut, 6b is a step thereof,
14 is a fitting hole, 15 is a rectangular recess, 16 is a dish-shaped outer surface, and 20 is a fitting hole.

Claims (1)

[Scope of utility model registration request] A rim member and a disk member are formed separately, and the proximal end of the rim member is joined to a joint seat formed on the disk member and tightened with a bolt, in which a bolt is attached to the center of the circular head of the bolt. A rectangular recess is formed, and a fitting hole for receiving the bolt head is formed in the joint seat, and a conical surface is formed on the outer end surface of the nut to be screwed and tightened with the bolt, and a rim member is fitted therein. A prefabricated vehicle wheel characterized by integrally forming a stepped portion that fits into a hole.