JP2558226Y2 - Rolling bearing device for suspension - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension rolling bearing device provided on a swing support portion of a swing arm of a motorcycle, for example.

[0002]

2. Description of the Related Art Conventionally, a swing support portion of a swing arm of a motorcycle is provided at an end of the swing arm as disclosed in Japanese Utility Model Laid-Open No. 57-57191 and Japanese Patent Laid-Open No. 64-56289. A large number of needle rollers are interposed in the annular gap between the inner circumference of the formed cylinder and the outer circumference of the support shaft, and a seal device is attached to the end of the cylinder of the swing arm so as to sandwich this needle roller from both ends. I have.

[0003]

In the above-mentioned conventional example, since the needle roller and the sealing device are separate bodies, the assembling and disassembling operations on the motorcycle maker side become complicated, and the outer peripheral surface of the support shaft is reduced. Since it is used as the raceway surface of the needle roller, there is a problem that the outer peripheral surface of the support shaft needs to be finished with high precision and high hardness, which increases the cost.

Further, since the needle roller is housed densely in a limited annular space, it is considered that the amount of grease sealed is small, and the lubricating state deteriorates in a relatively short period of time. It is pointed out that peeling and indentation are likely to occur.

The present invention has been made in view of such circumstances, and has as its object to simplify the assembling and disassembling operations, reduce the manufacturing cost of the mounting partner, and improve the lubricity.

[0006]

In order to achieve the above object, the present invention provides a suspension rolling bearing device interposed between a swing support portion of a swing arm of a motorcycle and a support shaft. The configuration is as follows.

[0007] The rolling bearing device for suspension of the present invention comprises: a shell-shaped outer ring having radially inward flanges at both axial ends; a cage held by the shell-shaped outer ring;
A plurality of cylindrical rolling elements rotatably held in pockets formed at several places on the circumference of the retainer, and provided between each of the axial ends of the retainer and the flanges on both ends of the shell-shaped outer ring. Seal device, and an inner ring body with which the cylindrical rolling element is in rolling contact with, and the inner ring body is press-fitted to the outer periphery of an inner cylinder made of a thick-walled forged steel material, and the outer peripheral surface is cylindrically rolled. It is characterized in that it comprises a raceway surface of a moving body and an outer cylinder made of a thin steel material subjected to hardening treatment.

[0008]

[Operation] In other words, since the unit is formed as a structure with inner and outer rings and a seal, it is easy to handle. Further, since the support shaft of the swing arm is not used as the raceway surface of the cylindrical rolling element as in the related art, it is not necessary to make the outer peripheral surface of the support shaft the raceway surface of the cylindrical rolling body. Further, since the cylindrical rolling elements are held by the retainer, a large grease-filled space is formed between the cylindrical rolling elements adjacent in the circumferential direction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. In the drawing, reference numeral 1 denotes a cylindrical portion formed at the end of the swing arm, 2 denotes a support shaft, and 3 denotes a rolling bearing device interposed between the inner periphery of the cylindrical portion 1 and the outer periphery of the support shaft 2.

The rolling bearing device 3 includes a shell-shaped outer ring 4 having radially inward flanges 4a, 4a at both ends in the axial direction.
And a retainer 5 held inseparably by the shell-shaped outer ring 4.
A plurality of needle rollers 6 (cylindrical rolling elements) rotatably held in rectangular pockets 5a formed at several places around the circumference of the retainer 5; both ends of the retainer 5 and the shell-shaped outer ring 4 And sealing devices 7 and 7 provided between the flanges 4a and 4a at both ends of the roller, and an inner ring body 8 with which the needle roller 6 is in rolling contact.

The sealing device 7 is formed by attaching an elastic member 7b such as rubber which comes into contact with the outer peripheral surface of the inner ring body 8 to a core metal ring 7a whose upper half section is substantially L-shaped. A bifurcated lip (reference number omitted) is formed on the inner periphery of the elastic member 7b, and a hardening treatment (such as carburizing or induction hardening) is performed on the core metal ring 7a.

The inner race body 8 is made of a thick forged steel material (S45C or the like), and is press-fitted to the outer periphery thereof so that the outer peripheral surface becomes the raceway surface of the needle roller 6 and a hardening process such as quenching is performed. The outer cylinder 10 made of a thin steel material (such as SPB2S) is used in combination. A radially outward flange 9a is provided at one axial end of the inner cylinder 9, and a radially inward flange 10a is provided at one axial end of the outer cylinder 10.
Are integrally formed. The inner cylinder 9 is
Inexpensive forged products without special hardening treatment on the outer surface,
The outer cylinder 10 is manufactured by a press device as shown in FIGS. 2A to 2C in one continuous operation from drawing to punching, whereby the inner ring body 8 is manufactured. Costs have been reduced. That is, by forming the inner race body 8 by combining the inner cylinder 9 and the outer cylinder 10 as described above, the cost can be reduced as compared with the case of using a single inner race, and the outer race can be replaced even when it is replaced due to wear over time. The replacement of only the cylinder 10 is completed. FIG.
In the figure, 11 is a receiving die, 12 is a drawing punch, and 13 is a punch.

As described above, in the present embodiment, the inner and outer rings 8, 4
, The sealing device 7 has a sealed structure, the outer peripheral surface of the support shaft 2 is not the raceway surface of the needle roller 6, and a large grease enclosing space is provided by using the retainer 5. There are features.

The radially outward flange 9a of the inner cylinder 9 of the inner race 8 is used as a fixing piece to, for example, a chassis of a motorcycle, and the radially inward flange 10a of the outer cylinder 10 is as shown in the figure. The nut 14 is used as a washer.

[0016]

[Effects of the Invention] As described above, in the present invention, since the rolling bearing device is unitized as a structure with inner and outer rings and seals to make it easier to handle, assembling the swing arm of the motorcycle with the swing support portion.・ Disassembly work can be performed easily. In addition, since the support shaft of the swing arm does not have the raceway of the cylindrical rolling element as in the related art and has a structure having an inner ring, the trouble of making the outer peripheral surface of the support shaft the raceway surface of the cylindrical rolling element is unnecessary. Thus, it is possible to contribute to a reduction in the manufacturing cost of the mounting partner. Furthermore, since a large space is secured between the cylindrical rolling elements by using a type in which the cylindrical rolling elements are held by the retainer, the amount of grease can be increased, and the lubricating state can be maintained well over a long period of time. become. In addition, the inner ring
A flank that abuts the end of the swing arm at one end of the tube
The bearing device allows the bearing device to
It can be easily positioned and fixed at the flange.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rolling bearing device according to an embodiment of the present invention.

FIG. 2 is a manufacturing process diagram of an outer cylinder of an inner ring body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cylindrical part of a swing arm 2 Support shaft 3 Rolling bearing device 4 Shell-shaped outer ring 5 Cage 6 Needle roller 7 Sealing device 8 Inner ring 9 Inner cylinder inner cylinder 10 Inner cylinder outer cylinder

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Showa 57-57191 (JP, U) Japanese Utility Model Showa 64-24728 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A suspension rolling bearing device interposed between a swing instruction portion of a swing arm of a motorcycle and a support shaft, the shell-shaped outer ring having radially inward flanges at both axial ends. And a retainer held by the shell-shaped outer ring; a plurality of cylindrical rolling elements rotatably held in pockets formed at several locations around the circumference of the retainer; comprising a sealing device provided respectively between each of the both end sides of the flange of the outer ring, the inner ring member in rolling contact said cylindrical rolling elements, and the inner ring body, Sui to Do Ri from one end forged material of the thick
An inner cylinder formed with a flange that abuts against an end surface of the cylindrical portion of the rolling arm, and an outer cylinder made of a thin steel material which is press-fitted to the outer periphery and whose outer peripheral surface is a raceway surface of a cylindrical rolling element and subjected to hardening treatment. A rolling bearing device for a suspension, comprising: