JPS6317857Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is characterized in that the bearing used in the joint etc. has a double structure consisting of a low elasticity member and a high elasticity member.

Conventionally, in bearings applied to ball studs, etc., a low elasticity member such as a plastic material is integrally molded into the bearing material, and when the bearing is press-fitted into a socket, the elastic force generated creates operating resistance in the ball stud. However, unless the accuracy of the bearing and the bearing press-fit part is improved, the elastic force generated in the bearing after press-fitting will have a large error, and the operating resistance of the ball stud may be too high or too low, making it difficult to find an appropriate operating resistance. I couldn't get anything.

In the present invention, as the low elasticity member used for the sliding surface of the stud, a low elasticity member with high durability (wear resistance), such as polyamide resin, polyacetal resin, reinforced plastic, reinforced plastic material containing glass wool, etc. is used. The high elasticity member that completely surrounds the outside of the low elasticity member 5 is made of a material with particularly high elasticity, such as urethane or rubber. With this configuration, even if the bearing is strongly press-fitted into the socket, the high elasticity member does not As a result, the internal pressure escapes through the upper opening, and the elastic force is also reduced.Therefore, even without increasing the accuracy of the bearing and the bearing press-fitting part as much as in the past, the ball stud can maintain stable operating resistance after press-fitting.

That is, the present invention takes advantage of the respective features of the low-elasticity member and the high-elasticity member and compensates for the drawbacks of each, and the characteristics are shown in FIG.

In Figure 5, the vertical axis represents the operating torque of the ball stud, and the horizontal axis represents the bearing press-fitting allowance (adjusted by the amount of crimping).The ball stud operating torque when the bearing press-fitting allowance is within a certain tolerance. FIG. 3 is a diagram showing differences in tolerance.

In other words, if the bearing press-fit allowance is within a certain tolerance a, the bearing using the conventional low elasticity member will be 5th
Since the curve shown in the figure is drawn, the tolerance a' of the operating torque of the ball stud is large and adjustment is difficult. A bearing using a highly elastic member is shown in FIG. 5, but cannot be used because the elastic force and operating torque are too low. The device of the present invention (see FIG. 5) serves an intermediate function between them, and has only the advantages of both.

Furthermore, since a highly wear-resistant material is used for the sliding surface of the stud, wear of the sliding surface is reduced and stable operating resistance of the stud can be obtained. Further, in the bearing press-fitting work, there is no need to worry about the bearing falling down when press-fitting it into the socket, making press-fitting simple and easy to manufacture. Furthermore, it goes without saying that durability can be further improved by forming oil grooves in the low elasticity member portion of the stud sliding surface. Furthermore, the presence of the highly elastic member of the bearing of the present invention allows it to be used in devices that utilize torsional action, such as idler arms of automobiles.

Fig. 1 shows an embodiment of the present invention, in which 1 is a socket, 2 is a mounting part with other parts, 3 is a drawing caulking part, 4 is a stud, 5 is a low elasticity member, and 6 is a high elasticity member. The sliding part with the spherical part 4' at the tip is received by a low elasticity member 5, and the high elasticity member 6 is arranged to completely wrap the outside of the low elasticity member 5, and this double molded structure bearing is inserted into a socket. After the stud is press-fitted into the socket 1, the bearing press-fit opening of the socket 1 is narrowed and caulked to provide operating resistance to the stud.

A double-molded bearing may be formed by molding the inner and outer parts separately, or may be formed by a single molding machine.

FIG. 2 shows a case where the stud end is shaft-shaped, and is similar to FIG. 1 in that the bearing portion is constructed by double molding of a low elasticity member 5 and a high elasticity member 6 that completely surrounds the outside thereof.

FIG. 3 shows a state in which a low elasticity member 5 and a high elasticity member 6 are provided with a concave and convex fitting portion to increase the fixing area between the two. The concavo-convex fitting portion can be arbitrarily formed into a dotted shape, a linear shape, or an annular shape.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of an embodiment of the present invention, FIGS. 2 and 3 are sectional views of main parts of other embodiments of the present invention, FIG. 4 is a sectional view of a comparative part of a conventional example, and FIG. The figure is a bearing press-fitting allowance-stud operating torque curve diagram. 1...Socket, 3...Aperture caulking part, 4...
Stud, 5...Low elasticity member, 6...High elasticity member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a socket that has a bearing press-fit opening, a bearing mounting part, and a mounting part for other parts, a low elasticity member is used on the sliding surface of the stud, and the outer surface of the low elasticity member is A double molded bearing having a highly elastic member fixedly arranged so as to completely enclose it is press-fitted into the socket, and the bearing press-fit opening of the socket is squeezed and caulked to generate operating resistance in the stud. Double molded bearings such as joints. (2) A double molded bearing such as a joint according to claim 1 of the utility model registration claim, wherein the stud end is spherical and the bearing has a spherical bore. (3) A double molded bearing such as a joint according to claim 1 of the utility model registration claim, wherein the stud end is shaft-shaped and the bearing inner cavity is also cylindrical. (4) Double joints, etc. as set forth in any one of claims 1 to 3 of the claims for utility model registration, in which the bonding surfaces of the low-elasticity member and the high-elasticity member are made uneven, etc. to increase the bonding area. Molded bearing.