JPS6332465Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a ball joint covering (dust cover).

As a conventional dust cover, there is one shown in FIG. 1, for example.

In Fig. 1, 1 is a ball stud, 2 is a socket, and 3 is a dust cover.At the fitting part of the dust cover 3 to the socket 2, in Fig.
In the figure, the one using an O-ring 5 is shown.

In any case, with such conventional dust covers, a dust cover attachment part was provided in the socket as shown in Figure 1, and a dust cover made of rubber or the like was attached to this attachment part. Since no consideration was given to the effect of external forces, there was a problem in that the area near where the dust cover was attached to the socket could be damaged by flying stones due to flying stones.

The present invention was developed by focusing on these conventional problems, and includes a large number of vertically-shaped rib-like protrusions placed at small intervals around the entire circumference near the attachment point of the dust cover to the socket (inner or outer periphery). The above-mentioned problem is solved by protruding evenly over the entire length and decreasing the height of the rib-like protrusions as the distance from the mounting portion increases.

FIG. 2 is a diagram showing an embodiment of the present invention.

FIG. 2A is an external view, B and C are cross-sectional views of the mounting portion corresponding to FIGS.

As shown in FIG. 2A, the dust cover 10, which is made of a flexible member, has a vertically elongated rib-shaped protrusion 13 on the outside near the attachment part 12 to the socket 11.
A large number of reinforcing parts are evenly provided at small intervals over the entire circumference.

As shown in FIG. 2 (b) and (c), the rib-like protrusion 13 is configured such that the height b is high on the side of the mounting part 12 and becomes lower as shown in a as the distance from it increases (a<
b) As a result, the height or thickness of the rib-like protrusion 13 is increased in the vicinity of the attachment part 12 of the dust cover 10, which is most likely to cause cracks if it contacts the outer periphery near the upper end of the socket 11 and is hit by a stepping stone or the like from the outside. In addition to sufficiently absorbing the impact of flying stones, etc., the height of the upper part of the rib-like protrusion 13 is lowered so that the elastic deformation of the dust cover 10 that follows the rocking movement of the ball stud is minimized. I try not to cause any trouble.

The rib-like protrusion 13 may have a simple vertically elongated shape with a narrow width as shown in FIG. Alternatively, as shown in FIG. 2E, a vertical groove may be formed in the center of the rib-like protrusion 13, the thickness of which is slightly thicker than that of the portion other than the protrusion.

FIG. 3 shows another embodiment.

In this embodiment, a large number of vertically elongated rib-like protrusions 13 are equally provided at small intervals around the entire circumference on the inside near the attachment part 12 of the dust cover 10, as in the case of FIG. It is the same as Figure 2.
Portions corresponding to those in FIG. 2 are designated by the same reference numerals.

As described above, according to the present invention, vertically elongated rib-like protrusions are formed on the outside or inside of the vicinity of the attachment part of the dust cover to the socket, protruding evenly over the entire circumference at small intervals, and the rib-like protrusions are The height of the rib-shaped protrusion is high in the part near the mounting part, which is most likely to cause cracks and tears due to stepping stones etc. The rib-shaped protrusion absorbs external forces caused by stepping stones, etc. to prevent cracks and tears, and the height of the upper part of the rib-shaped protrusion away from the mounting part is lowered to prevent the ball stud from swinging. This is extremely effective because it prevents the followability of the dust cover from being affected.

In addition, in the present invention, the longitudinally shaped rib-like protrusions are formed discontinuously with small intervals, so the strength against repeated bending loads of the part in contact with the outer periphery near the upper edge of the socket is significantly improved, and the dust cover is Not only can durability be greatly improved, but even if a slight crack occurs in the small interval, the rib-like protrusion prevents the crack from progressing in the circumferential direction.
This eliminates the risk of the internal grease rapidly leaking out and rendering it inoperable, and the structure is simple and easy to form, and together with the low cost, it can bring about great practical effects.

[Brief explanation of the drawing]

Figures 1A and 1B are longitudinal sectional views of examples of conventional ball joint devices, Figures 2A, 2B, C, 2, and 3E are examples of the covering body of the present invention, and A is an external view; B and C are longitudinal cross-sectional views of the main parts, D and E are cross-sectional views of the projections, and FIGS. 3A and B are longitudinal cross-sectional views of the main parts of other embodiments of the present invention. It is. 10...Dust cover, 11...Socket, 1
2... Attachment portion, 13... Rib-shaped protrusion, 14...
Reinforcement part, 15...O ring.

Claims (1)

[Claims for Utility Model Registration] (1) Flexibility in which two members are connected so that they can be displaced from each other, and the fitting portions at both ends are fitted to each of the members so as to cover the connected portions. In a covering body having a downward fitting part (attachment part)
1. A covering comprising a reinforcing part formed on the outside or inside of the vicinity thereof, in which a large number of vertically elongated rib-like protrusions that become lower as the distance from the attachment part protrudes evenly over the entire circumference at small intervals. (2) The utility model registration claim 1 is characterized in that the rib-like protrusion has a longitudinal recess formed in the center thereof, the thickness of which is slightly thicker than that of the small interval portion. Covering as described.