JPS6211681Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a wheel used for two-wheeled vehicles, etc., which is lightweight and easy to mold, has strength that can withstand pressure from all directions, and has a hub and spokes as its constituent members. The purpose is to provide a product that improves work efficiency when assembling plates, rims, etc. as one piece.

Conventional wheels used for two-wheeled vehicles such as motorcycles have a hub that forms a damper storage area, a brake storage area, a wheel bearing area, etc., and a ring-shaped rim around which a tire is attached. They were constructed by being elastically connected using elastic wires. However, this elastic wire requires complicated and troublesome work to assemble and is extremely inefficient, so flat spoke plates have come to be used as a substitute for the elastic wire.

However, such spoke plates are heavy and there are concerns about their mechanical strength, so it has been considered that the spoke plates can be integrated with the rim and part of the hub, but this method is not suitable for wheels. Although strength is ensured, there are disadvantages in forming precision, and pressing requires double effort.

Therefore, it is desirable to mold the spoke plate itself as a single unit as long as it is lightweight and strong, but if the spoke plate is made into a single unit, there will be concerns especially about the strength of the assembly with the hub. However, there was a problem with the mechanical strength of the wheel as a whole.

A serious problem with this type of spoke plate alone is that it is extremely difficult to accurately center the hub when welding and fixing the spoke plate and the rim.

This is because there is no reference point for centering both the spoke plate and the rim, and the rim itself is not necessarily a perfect circle. For this reason, conventional wheels of this type require other assembly equipment to hold the rim in a perfect circle, and equipment to set and center the mutual relationship between the hub and spoke plates at a constant position. The work was also extremely difficult and troublesome.

Therefore, the wheel according to the present invention can be easily molded while ensuring the desired strength, and the wheel can be easily and accurately assembled (particularly centering). Examples thereof will be described below with reference to the drawings.

The wheel according to the present invention is constructed by fixing a rim 3 to the outer circumferential end of a spoke plate 2 in which a hub 1 is fitted and welded to the center.

First, the hub 1 has a substantially cylindrical shape, and a cylindrical bearing case 6 serving as a vehicle bearing is passed through a hole bored in the bottom plate part 5 of a cylindrical brake drum case 4 at a coaxial position. The brake drum case 4 and the bearing case 6 are fixed together by welding or the like, and in order to securely assemble the brake drum case 4 and the bearing case 6, a ring plate-shaped retainer 7 is attached to the inner peripheral end of the bearing case. 6 and the outer periphery of the retainer 7 is fixed to the inner surface of the bottom plate 5 for reinforcement. The rim 3 was ring-shaped, with the inner circumferential surface of the central portion bulging and curved in the radial direction, and a tire (not shown) was mounted on the outer circumference, and the spoke plates 2 were connected to the hub 1 and the rim. intervening between 3 and
It constitutes the wheel to which the tire is attached.

A steel spoke plate 2 in the shape of a flat plate formed by press punching has an appropriate number of spokes formed at the outer peripheral end of a hub assembly part 9 having a hub fitting hole 8 in the center into which the above-mentioned hub 1 is fitted. In the embodiment, three spoke plate portions 10 are arranged radially at equal central angles, and a portion fixed to the inner circumferential surface of the rim 3 is provided at the tip of the spoke plate portion 10. Furthermore, window holes 11 of a desired size are bored in the spoke plate portion 10, thereby making the spoke plate 2 lightweight.

In addition, by punching and forming the window hole 11,
Two leg portions 10a are formed on the spoke plate portion 10, and both leg portions 10a are connected to the rim 3.
The rim 3 is formed so as to support the rim 3 diagonally, with the tips approaching each other with the diameter center line as the center, so that the rim 3 is easily elastically deformed and serves as a type of cushion to ensure a comfortable ride for the vehicle. There is.

A reinforcing edge 12 is formed on the outer peripheral edge of the spoke plate 2 having such a structure by bending the outer peripheral end of the spoke plate 2 over the entire circumference. The 12 parts of the reinforced edge are
Contact portion 1 whose outer circumferential surface is fixed to the inner circumferential surface of the rim 3
2a, and the reinforcing edge 12 portion located on the outer periphery of the hub assembly portion 9 is attached to the assembly portion 1 which will be described later.
It has become 2b.

The distal end edge of the abutting portion 12a abuts against an inner circumferential end curved surface formed in a radially bulging and curved manner on the inner circumferential surface of the central portion of the rim 3, thereby setting the centering position of the rim 3. A curved positioning edge 13a is provided protrudingly. This positioning edge 13a is located at the contact portion 12.
It may be provided in a protrusion-like manner from the tip edge of the contact portion 12a, or may be provided in a protrusion-like manner along the tip edge of the contact portion 12a.

If the strength of the spoke plate 2 as a whole is increased by bending the edge 13 outward over the entire circumference at the tip of the reinforcing edge 12, one part of the edge 13 By using the positioning edge 13a as the positioning edge 13a, it can also serve as a forming operation for the positioning edge 13a.

Further, a flange portion 14 is bent and formed on the outer peripheral end of the spoke plate 2 along the insertion hole 8 .

Then, the hub 1 is inserted into the fitting hole 8 of the spoke plate 2, and the outer peripheral surface of the hub 1 and the edge of the fitting hole 8 are fixed by welding or the like, and the inner peripheral surface side end of the rim 3 is attached to the spoke plate 2. The hub 1, the spoke plates 2, and the rim 3 are assembled together until the curved surface portion hits the positioning edge 13a, and at that position, the abutment portion 12a and the rim 3 are fixed by welding or the like. In order to further secure the adhesion between the hub 1 and the spoke plate 2 and to ensure the strength of the spoke plate 2, the adhesion is reinforced via a reinforcing plate 15.

That is, the hub 1 and the spoke plates 2 are fixed in a stable posture by the flange 14 as will be described later, but the flange 14 is also attached at a predetermined location on the outer circumferential surface of the hub 1 with an appropriate distance between them. A ring-shaped reinforcing plate 15 is fixed to the reinforcing plate 1.
5 is fixed to the tip of the ring piece-shaped reinforcing engagement part 12b located on the outer periphery of the hub assembly part 9 of the spoke plate 2.

In other words, in the embodiments shown in FIGS. 1 and 2, the reinforcing plate 1 has a flange 16 bent at the base end.
At the tip of the reinforcing plate 15, which is also bent, there is a flange 1, which is also bent.
7 is molded, and the reinforcing plate 15 is attached to the rim 1.
The inner circumferential surface of the flange 16 is welded to the outer circumferential surface of the hub 1 by being tightly fitted to the outer periphery, and the flange 17 is tightly fitted and welded into the reinforcing flange attachment part 12b.

Furthermore, in the embodiments shown in FIGS. 4 and 5, the reinforcing plate 15 described above has only the flange 15 formed at the base end, and the flange 16 is attached to a predetermined position on the outer periphery of the hub 1 by welding or the like. It is fixed and the tip end is fixed to the end face of the reinforcing joint part 12b of the spoke plate 2 fitted into the hub 1, reinforcing the assembly of the hub 1 and the spoke plate 2 and the strength of the spoke plate 2 itself.

The wheel according to the present invention has the configuration as described above.

Therefore, first, the reinforcing edge 12 is located at the peripheral end of the spoke plate 2 and has a substantially L-shaped cross section to function as a reinforcing rib of the spoke plate 2. The structure has sufficient resistance to external forces along the When the spoke plate 2 is fitted into the rim 3, the outer circumferential surface of the abutment part 12a at the tip of the spoke plate part 10 comes into surface contact with the inner circumferential surface of the rim 3, making welding work easier and preventing wobbling. Since there are no rims, adhesion can be ensured, and the spoke plates 2 firmly support the rim 3.

Furthermore, when assembling the spoke plate 2 to the rim 3, when the spoke plate 2 is inserted into the rim 3 from a predetermined direction, a positioning edge 13a is formed on the inner peripheral surface side end of the rim 3.
The spoke plates 2 and the rim 3 can be assembled easily and accurately.

Furthermore, since the reinforcing plate 15 is arranged when the hub 1 and the spoke plate 2 are fixed together, the hub 1
and the spoke plate 2 are assembled more securely,
Moreover, it can firmly withstand the external force that the wheel receives, especially from the axial direction. Moreover, the reinforcement plate 15
is formed into a ring plate shape and is tightly fitted and welded to the outer periphery of the brake drum case 4 of the hub 1, so especially in the embodiments shown in FIGS. 1 and 2, the drum case is There are various advantages such as almost no chattering phenomenon caused by the drum case 4, making it easier to dissipate the heat generated during braking, and furthermore preventing deformation of the drum case 4 in the case of an internal expansion type brake. .

Regarding the reinforcement support for this reinforcing plate 15, the embodiments shown in FIGS. 1 and 2 are better than those shown in FIGS.
Compared to the embodiment shown in FIG. 5, the mutual posture is more stable and more effective from the point of view of fitting into the reinforcing joint part 12b, but the press forming accuracy is lower than that of the latter embodiment. would be required and the process would be time-consuming.

Note that the edge 1 is bent and formed on the outer periphery of the reinforcing edge 10.
1 serves as a reinforcing rib of the above-mentioned reinforcing edge 10, and also facilitates molding of the positioning edge 11a.

Also, the flange 14 bent and formed on the inner circumference of the spoke plate 2 functions as a reinforcing rib for the hub assembly portion 9 of the spoke plate 2, similar to the edge 13 described above, and connects the spoke plate 2 to the hub 1. When fitted into the hub 1, it makes surface contact with the outer peripheral surface of the hub 1, making welding work easier.
Also, since there is no wobbling, it is possible to ensure firmness.

Therefore, in the wheel according to the present invention, the individual parts can be easily formed by press processing, it is easy to achieve precision, and it can be manufactured at low cost, and centering when assembling the hub, spoke plates, rim, etc. is extremely easy. This invention improves work efficiency because it can achieve this, and because the rim and spoke plates are properly centered, the left and right balance of the wheel is ensured, adding stability to mechanical strength. It is excellent and effective.

[Brief explanation of the drawing]

Fig. 1 is a front view of the present invention, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 shows another embodiment. The front view and FIG. 5 are cross-sectional views taken along the - line in FIG. 4. 1...Hub, 2...Spoke plate, 3...Rim,
9...Hub assembly part, 10...Spoke plate, 12...
...Reinforcement edge, 13a... Positioning edge, 15... Reinforcement plate.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A wheel with a rim 3 fixed to the outer peripheral edge of a spoke plate 2 in which a hub 1 is fitted in the center, and a hub assembly having a hub insertion hole 8 in the center. Part 9
A spoke plate 2 configured by radially connecting a plurality of spoke plate parts 10 at equal central angles on the outer peripheral edge of the spoke plate 2.
A bent and rising reinforcing edge 12 is continuously provided around the entire circumference of the outer circumferential edge of the rim 3, and a portion of the reinforcing edge 12 located at the tip of the spoke plate portion 10 is fixed to the inner circumferential surface of the rim 3. In addition to forming a contact portion 12a, a positioning edge portion 13a that is curved in accordance with the curvature of the inner peripheral surface side end of the rim 3 is provided protruding from the tip edge of the contact portion 12a, and furthermore, a positioning edge portion 13a is provided at a predetermined location on the outer circumference of the hub 1. A wheel formed by fixing a ring plate-shaped reinforcing plate 15 that is fitted and fixed to the tip of a ring-shaped reinforcing fitting part 12b located on the outer periphery of the hub assembly part 9 of the spoke plate 2. (2) The wheel according to claim (1) for registration of a utility model, in which the tip of the reinforcing plate 15 is bent and molded so as to fit tightly into the reinforcing fitting part 12b.