JPH0545521Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a mounting structure for a wheel cap attached to a disc wheel of an automobile.

[Conventional technology]

Conventionally, a cap that covers a hub hole and an annular plate that covers a hub bolt mounting hole provided around the hub hole have been known for disc wheels of automobile wheels, and both are used for decoration of disc wheels. It is installed to cover hub holes etc.

In a disc wheel equipped with such a cap and an annular plate, the attachment means is to fit the annular plate into an annular recess provided around the hub hole, and then fit the annular plate into the cylindrical portion protruding from the hub hole. A structure in which a cap is screwed together and an annular plate is pressed and fixed by the lower end surface of the cap is widely used.

[The problem that the idea attempts to solve]

However, with such a cap mounting structure, the cap must be rotated several times to tighten the cap onto the threaded portion protruding from the hub hole, which not only takes time but also weakens the tightening force. This may result in incomplete cap installation.

Furthermore, the heat generated by the disc wheel during running is transmitted to the screw tube and the cap, and the difference in thermal expansion coefficients between the two may cause the cap to become loose, or the cap may become unscrewed due to vibrations during running. There were problems such as the annular plate coming off unexpectedly and being lost.

The object of the present invention is to provide a wheel cap mounting structure that solves these problems.

[Means to solve the problem]

In order to achieve the above object, the wheel cap mounting structure of the present invention has an opening of a hub hole 2 of a disc wheel 1 having a hub hole 2 formed in the center, as shown in the drawings corresponding to the embodiments. A cap mounting cylindrical portion 5 is provided protrudingly at the end, and an annular recess 3 is provided on the surface of the disc wheel 1 around the cylindrical portion 5, and an annular plate 10 is fitted into the annular recess 3.
In the wheel cap mounting structure in which a wheel cap is fixed by a cap 7 attached to a cylindrical part 5, an engaging circumferential groove part 13 is provided on the lower side of the outer circumferential surface of the cylindrical part 5, and the engaging circumferential groove part 13 is connected to the engaging circumferential groove part 13 from the upper surface. A plurality of communicating longitudinal guide grooves 14, 14, 14 are provided, and the guide longitudinal grooves 14 are provided at a plurality of locations on the inner peripheral surface of the cap 7.
A spring washer 11 is provided between the upper surface of the annular plate 10 fitted in the annular recess 3 and the lower end surface of the cap 7. It is characterized by intervening.

[Effect]

After fitting the annular plate 10 into the annular recess 3 of the disc wheel 1 and placing the spring washer 11 on the upper part of the inner periphery, the cap 7 is fitted into the guide vertical groove 14 provided on the outer periphery of the cap mounting cylindrical part 5. The cap 7 is attached to the cylindrical part 5 by aligning the protrusion 9 protruding from the inner peripheral surface of the cap 7.
the lower surface of the cap 7 with the spring washer 11
bring it into contact with.

If the cap 7 is further pushed forward from this state against the elasticity of the spring washer 11, the protrusion 9 of the cap 7 passes through the guide vertical groove 14 and reaches the engagement circumferential groove 13, pushing the cap 7 in the circumferential direction. When the protrusion 9 is rotated at an appropriate angle and then released, the restoring force of the spring washer 11 locks the protrusion 9 into the locking circumferential surface of the engagement circumferential groove 13, and the installation of the cap 7 is completed. do.

In this state, the spring washer 11 is compressed with a constant elastic force, and this elastic force causes the protrusion 9 of the cap 7 to move into the engagement circumferential groove 13.
At the same time, the annular plate 10 is pressed and fixed to the annular recess 3 of the disc wheel 1.

To remove the cap 7, rotate the cap 7. When the protrusion 9 is located in the guide groove 14, the elasticity of the spring washer 11 will cause the protrusion 9 to be inserted into the guide groove 14 naturally. In this state, the cap 7 can be removed from the cylindrical portion 5.

〔Example〕

The embodiments of the present invention will be explained with reference to the drawings: 1
is a disc wheel made of light alloy such as aluminum alloy,
A hub hole 2 is bored in the center thereof, and an annular recess 3 is provided in the inner circumference of the surface of the disc wheel 1 around the hub hole 2, with the hub hole 2 in the center. A plurality of hub bolt mounting holes 4 penetrating through the back surface of the disc wheel 1 are bored at regular intervals in the circumferential direction on the inner bottom surface of the seat 3.

Furthermore, on the inner peripheral side of the opening end of the annular recess 3,
A cap mounting cylindrical portion 5 is integrally provided at the open end of the hub hole 2 and protrudes from the surface of the disc wheel 1, and a small diameter annular horizontal surface 6 is provided between the outer peripheral lower end of this cylindrical portion 5 and the opening inner peripheral end of the annular recess 3. There is.

7 is a hat-shaped cap made of a light alloy such as an aluminum alloy or a suitable hard alloy resin material, and has an inner diameter larger than that of the cylindrical portion 5;
At the lower end, a flange portion 8 is provided that projects outwardly and horizontally.
Three engaging protrusions 9, 9, 9 are provided protruding in the inner diameter direction at intervals of 120 degrees. Note that the number of engagement protrusions 9 is not limited to three, and may be provided at a plurality of locations.

Reference numeral 10 denotes an annular plate made of a metal plate or a synthetic resin plate, which is formed in a shape that can be fitted into the annular recess 3, and a portion extending from the center to the outer periphery is bulged and formed into a gate-shaped cross section. The upper surface thereof is made to be substantially flush with the surface of the disk wheel 1, and the flange portion 8 of the cap 7 is fitted onto the plane of the inner peripheral portion.

Reference numeral 11 denotes a spring washer interposed between the lower surface of the flange of the cap 7 and the upper surface of the inner periphery of the annular plate 10, and is formed into a chevron-shaped cross section or curved in a wave shape in the circumferential direction to provide elastic force in the vertical direction. It has been done.

Reference numeral 12 denotes a locking ring body fitted onto the lower end of the outer periphery of the cylindrical portion 5 with its lower surface placed on the annular horizontal surface 6, and is disposed in the space between the cylindrical portion 5 and the cap 7. An engaging circumferential groove portion 13 is provided on the outer peripheral portion of the lower end, and a plurality of guide vertical grooves 14, 14, 14 are provided which communicate with the engaging circumferential groove portion 13 from the upper surface.

This guide groove 14 is located at a location corresponding to the engaging protrusion 9 provided on the cap 7, that is, in the figure,
They are provided at three locations at intervals of 120 degrees in the circumferential direction, and are formed to have a width that allows the engagement protrusion 9 to be inserted therethrough.

Reference numeral 15 denotes a C-shaped elastic locking ring which is removably fitted into a groove 16 provided on the outer peripheral surface of the cylindrical portion 5, and is in contact with the upper surface of the inner peripheral portion of the locking ring body 12 to prevent it from coming off. It is something that exists.

With this configuration, disk wheel 1
When the annular plate 10 is fitted into the annular recess 3 of the disc wheel 1, the hub bolt mounting groove 4 formed in the disc wheel 1 is covered by the annular plate 10.

After placing the spring washer 11 on the upper surface of the inner circumferential portion of the annular plate 10, the cap 7 is fitted onto the cylindrical portion 5, and the engaging protrusion 9 protruding from the inner circumferential surface of the lower end is used to guide the locking ring body 12. While inserting the cap 7 into the vertical groove 14, the lower surface of the flange 8 of the cap 7 is brought into contact with the spring washer 11, and then the engaging protrusion 9 is pressed downward against the elasticity of the spring washer 11.
When the cap 7 is rotated at an appropriate angle in the circumferential direction and then released, the protrusion 9 is moved from the guide longitudinal groove 14 to the engagement circumferential groove 13 by the restoring force of the spring washer 11. The installation of the cap 7 is completed by pressing and locking it onto the top surface.

In this state, the spring washer 11 is compressed with a constant elastic force, and this elastic force causes the protrusion 9 of the cap 7 to move into the engagement circumferential groove portion 13.
At the same time, the annular plate 10 is pressed and fixed to the annular recess 3 of the disc wheel 1.

To remove the cap 7, rotate the cap 7. When the protrusion 9 is positioned in the guide groove 14, the elasticity of the spring washer 11 will cause the protrusion 9 to be inserted into the guide groove 14 naturally. In this state, the cap 7 can be removed from the cylindrical portion 5.

In the above embodiments, the locking ring body 12 is used as a locking member for the cap 7, which is separate from the cap mounting cylinder part 5, but it may be formed integrally with the cap mounting cylinder part 5. Good too.

That is, as shown in FIG. 3, an engagement circumferential groove 13 is provided around the lower end of the outer periphery of the cylindrical portion 5, and a plurality of guide vertical grooves are provided that communicate with the engagement circumferential groove 13 from the outer periphery upper end of the cylindrical portion 5. 14, 14, 14 may be provided.

With this configuration, the structure can be simplified. Other structures and operations for attaching and detaching the cap are the same as in the previous embodiment.

[Effect of idea]

As described above, according to the wheel cap mounting structure of the present invention, the outer peripheral surface of the cap mounting cylindrical portion 5 protruding from the center of the surface of the disc wheel 1 is provided with the engagement circumferential groove portion 13 on the lower side, and the upper surface a plurality of guide vertical grooves 14 communicating with the engagement circumferential groove portion 13;
14, 14 are provided, the guide longitudinal groove 14 is inserted through the inner circumferential surface of the cap 7 at a plurality of places, and the protrusion 9 which can be engaged with the engagement circumferential groove part 13 is provided protrudingly, and the hub mounting hole is drilled. Since a spring washer 11 is interposed between the upper surface of the annular plate 10 fitted in the annular recess 3 and the lower end surface of the cap 7, the protrusion 9 protruding from the inner peripheral surface of the lower end of the cap 7 can be The cap 7 is aligned with the guide groove 14 provided on the outer peripheral surface of the cylindrical portion 5.
The cap 7 can be easily attached to the cylindrical part 5 by fitting the cap 7 into the cylindrical part 5, and in this attached state, the cap 7 is pushed by the elasticity of the spring washer 11.
The protrusion 9 maintains a locked state in the engagement circumferential groove 13 provided around the lower end of the cylindrical portion 5 even with a certain pressing force, and there is no risk of it slipping out from the cylindrical portion 5 even due to vibrations or the like. Top, the annular plate 10 is the spring washer 11
It serves as a reaction force receiving surface and can be securely fixed together with the cap 7.

Furthermore, when the cap 7 is rotated, when the protrusion 9 reaches the guide vertical groove 14 while sliding on the engagement circumferential groove 13, it will naturally move into the guide vertical groove 14 due to the elastic force of the spring washer 11. Therefore, the cap 7 can be easily removed as well as the above-mentioned installation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional front view, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 is a longitudinal sectional view showing another embodiment of the invention. It is a front view. 1... Disc wheel, 2... Hub hole, 3...
...Annular recess, 5...Cap mounting tube, 7...Cap, 9...Engaging protrusion, 10...Annular plate, 11...Spring washer, 13...Engaging circumferential groove, 1
4...Guiding vertical groove.

Claims (1)

[Scope of utility model registration request] A cap mounting cylindrical portion 5 is attached to the open end of the hub hole 2 of the disc wheel 1 which has a hub hole 2 bored in the center.
At the same time, an annular recess 3 is provided on the surface of the disc wheel 1 around the cylindrical part 5, and an annular plate 10 fitted into the annular recess 3 is fixed by a cap 7 attached to the cylindrical part 5. In the wheel cap mounting structure, an engagement circumferential groove portion 13 is provided on the lower side of the outer circumferential surface of the cylindrical portion 5, and a plurality of guide vertical grooves 14, 14, 14 communicate with the engagement circumferential groove portion 13 from the upper surface. On the other hand, protrusions 9 which can be inserted into the guide longitudinal groove 14 and engaged with the engagement circumferential groove part 13 are provided protrudingly at a plurality of locations on the inner circumferential surface of the cap 7, and are further fitted into the annular recess 3. A wheel cap mounting structure characterized in that a spring washer 11 is interposed between the upper surface of the joined annular plate 10 and the lower end surface of the cap 7.