JPS6271705A - Wheel for motorcycle or the like - Google Patents

Abstract

PURPOSE:To improve the commodity performance by forming a bolt head receiving part in circular conical form onto a rim and forming a female screw and a positioning recessed part at the top edge of the spoke of a spider and fastening these parts by bolts, in a two-piece wheel. CONSTITUTION:A bolt head part receiving part 7 is formed onto a rim 2. A recessed part 10 for receiving and positioning the bolt receiving part 7 of the rim 2 and a female screw 9 screwed with a bolt 4 are formed at the top edge of the spoke 6 of a spider 3. With such constitution, the rim 2 and the spider 3 align the receiving part 7 and the positioning recessed part 10, which are tightened by screwing the bolts 4 into the female screw 9. With such constitution, the predominance of two-piece wheel is maintained, and external appearance can be improved.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wheel used for example in a motorcycle, and particularly relates to an assembly structure of a rim and a spider in which a hub and spokes are integrally formed. This is related.

[Conventional technology]

For motorcycles and the like, there are various wheels with a so-called two-piece structure in which a rim and a spider are formed separately and assembled by bolting or the like. These two
Conventionally, in the case of piece wheels, when joining the two, a flange for attaching the spider is projected from the inner circumferential side of the rim, and the tip of the rim on the spider is aligned with this, and then both are attached to the surface of the wheel. It was designed to be assembled by tightening bolts so as to penetrate from the side.

(Problems to be Solved by the Invention) As a result of this configuration, the bolts for assembly were conventionally visible from the side of the wheel, resulting in poor appearance and, in turn, impeding FIB to some extent on its marketability. It was affecting me.

The present invention was made in view of these drawbacks,
This is an attempt to develop a wheel that has the same aesthetic effect as a so-called cast wheel with a one-piece structure while adding the cost advantages of a two-piece wheel.

[Means for solving problems]

That is, the assembly structure of a wheel for a motorcycle or the like according to the present invention consists of a rim and a spider, and the rim has a bolt head receiving part in which the rim is conically recessed in the axle direction, and a bolt head receiving part in the center of the receiving part. an opening bolt hole is formed, while a female thread into which a tightening bolt is screwed is formed at the tip of the spoke of the spider, and four positioning parts for receiving the protrusion of the head receiving part around the female thread;
This invention is characterized in that the rim and spider are fixed to each other by bolts passing through bolt holes in the rim, thereby achieving the above object.

〔Example〕

The present invention will be specifically described below based on illustrated embodiments. Reference numeral 1 indicates a wheel, and this embodiment is suitable for use in a relatively small-diameter scooter type motorcycle or the like. For example, this wheel 1 is constructed by integrally assembling a rim 2 formed by pressing and curling a steel plate, and a spider 3 formed by casting cast iron or light alloy using bolts 4. The spider 3 is a member in which a hub 5 and spokes 6 are integrally formed, and the hub 5 and spokes 6 do not have to be completely integrally cast, and the hub 5 and spokes 6 may be separate pieces. may also be assembled into one piece.

The assembly structure of the spider 3 and the rim 2 will be described in more detail below. First, the rim 2 is provided with bolt head receiving portions 7 at about three locations around the rim 2, as an example. As shown in FIGS. 2 and 3, the bolt head receiving portion 7 is an example of the rim 2, and is formed by forming a concave concave shape from the center toward the axle axis, and the tip side thereof A bolt hole 8 is formed through which the bolt 4 passes. In actual manufacturing, the receiving portion 7 is formed by, for example, punching the rim 2 and spider 3 in a temporarily assembled state. On the other hand, the corresponding spokes 6 of the spider 3 are provided with female threads 9 at their tips, that is, at the portions where they meet the rim 2, and are further provided with female threads 9.
A slightly flat tapered positioning portion 10 is formed at the tip of the spoke around the rim 2 to accommodate the protrusion of the receiving portion 7 on the rim 2.

In order to assemble the rim 2 and the Suba Tider 3 having such a configuration, first, the spider 3 is positioned at a predetermined position on the rim 2, which is formed in an annular shape, and then the spider 3 is press-fitted. The receiving portion 7 is formed into a recess using a punch, and the deformed projecting portion is formed so as to fit into the positioning recess 10 in the spoke 6. Thereafter, the bolt 4 is passed through the bolt hole 8 from the tire side of the rim 2, screwed into the female thread 9 of the spoke 6, and tightened.

Incidentally, the head of this bolt 4 is of a so-called rotating type, and has a contact surface shape that approximately matches the receiving portion 7 in the rim 2. Of course, in order to prevent this contact surface from galling with the rim 2, appropriate measures are taken, such as coating it with a somewhat flexible material or interposing a washer or the like.

〔Effect of the invention〕

As described above, the present invention maintains the advantages of a two-piece wheel in which the rim and spider are formed separately and assembled together, but has an excellent appearance that is almost equivalent to an integrally cast wheel. It is possible to obtain a product with good appearance and high marketability.

[Brief explanation of drawings]

FIG. 1 is a front view of a wheel to which the present invention is applied, FIG. 2 is a cross-sectional view taken along the line ■--■, and FIG. 3 is an enlarged cross-sectional view of the assembly portion. 1...Wheel 2...Rim 3...Spider 4...Bolt 5...Hub 6...
Spoke 7...Reception part 8...Bolt hole
9...Female thread 10...Positioning recess

Claims (1)

[Claims] 1. Consisting of a rim and a spider, the rim has a conically recessed bolt head receiving portion with the rim facing the axle direction, and a bolt hole opening in the center of the receiving portion; The tip of the spoke is formed with a female thread into which a tightening bolt is screwed, and a positioning recess for receiving the protrusion of the head receiving part around the female thread, and the rim and the spider are connected to each other by a bolt passing through a bolt hole in the rim. A wheel of a motorcycle, etc., characterized by being fixed.