JPH0653202U - Mounting structure of brake drum and wheel disc to hub - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a structure for mounting a brake drum and a wheel disc to a hub, and covers a hub bolt exposed to the outside of the wheel disc with a cap to prevent dust from adhering thereto. The purpose is to [Structure] A brake drum and a wheel disc are fixed to a hub by a hub bolt of the hub bolt and a washer and a wheel nut attached to the hub bolt. In the mounting structure of the brake drum and the wheel disc to the hub, the washer and the wheel nut are attached. The end of the hub bolt being extended is extended, and a cap having a female screw inside is screwed into the extended tip bolt part, and the washer and wheel nut mounted on the hub bolt exposed to the outside of the wheel disc by the cap. Covered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure in which a brake drum and a wheel disk are fixed to a hub provided on a vehicle axle by a hub bolt, a washer and a wheel nut attached to the hub bolt, and a wheel disc is attached to the hub. .

[0002]

[Prior art]

 To attach a wheel disc to which tires are attached and a brake drum to a hub of a conventional vehicle, a plurality of insertion holes are provided at positions equidistant from the center of the brake drum. Insert it into the hub bolt hole of the hub provided at the same distance from, and insert it into the hub bolt hole of the wheel disk provided at the same distance from the center.

Then, a wheel nut with a washer is screwed into a hub bolt and fastened, and the washer is interposed between the wheel nut and the wheel disc to fix the wheel disc and the brake drum to the hub. is there.

When tightening such a wheel nut with washer of a flat seat of the ISO method as described above, oil is applied to the screw part and the washer sliding part in order to prevent incomplete tightening due to frictional resistance at the time of tightening. I was tightening.

A prior art relating to a wheel cover for covering an opening of a wheel disc to which a tire of an automobile is attached is disclosed as a wheel cover described in Japanese Utility Model Publication No. 3-43002.

[0006]

[Problems to be solved by the device]

 The oil applied to the screw part and the washer sliding part squeezes out to the surroundings, and dust splattered near the wheel disk while the vehicle is traveling adheres to the spilled oil and stains it, resulting in a loss of appearance. there were.

The present invention solves the above-mentioned problems in the conventional structure for attaching the brake drum and the wheel disc to the hub, covers the hub bolt exposed to the outside of the wheel disc with the cap, and screwed the wheel to the hub bolt. The purpose is to prevent dust from adhering to the nut and washer.

[0008]

[Means for Solving the Problems]

 According to the present invention, a brake drum and a wheel disc are fixed to a hub by a hub bolt and a washer and a wheel nut attached to the hub bolt. Extend the tip of the mounted hub bolt, screw a cap with a female screw inside to the extended tip bolt part, and use the cap to attach the washer attached to the hub bolt exposed to the outside of the wheel disc. And the wheel nut is covered.

[0009]

[Action]

 The mounting structure of the brake drum and the wheel disc of the present invention to the hub is such that the cap formed with the female screw is screwed onto the extended bolt portion of the hub bolt on which the washer and the wheel nut are mounted. Can cover the washer and wheel nut mounted on the hub bolt exposed from the outside of the wheel disc, and prevent dust from adhering to them.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In the hub 1 in this embodiment, hub bolt holes 1a are formed at a plurality of positions equidistant from the center.

On the other hand, the base end portion 3 a of the hub bolt 3 is inserted into the insertion holes 2 a that are formed at the same distance from the center of the brake drum 2 as the hub bolt holes 1 a of the hub 1, and the hub drum 3 is attached to the brake drum 2. The attached hub bolt 3 is inserted into the hub bolt hole 1 a of the hub 1.

Further, the wheel disc 4 for mounting the tire on the peripheral surface is provided with hub bolt holes 4a which can be fitted into the hub bolts 3 at the same distance and the same distance from the center as the hub bolt holes 1a.

In the wheel nut 5 screwed to the hub bolt 4, a flat washer 6 is fitted into a protruding ring portion 5 a provided on one surface of the wheel nut 5, and the protruding ring portion 5 a is expanded to attach the flat washer 6. A wheel nut with a washer with an ISO flat seat is used.

The hub bolt 3 is formed with an extension bolt portion 3b projecting from a portion screwed with the wheel nut 5, and the nut 7 screwed with the extension bolt portion 3b is made of synthetic resin or metal. It is attached by an adhesive or other fixing means in the cap 8 having an inner cavity formed of a material that can be easily molded.

Instead of fixing the nut 7 to the inside of the cap 8, a female screw may be directly formed on the cap 8 made of a material that is easily molded and made of synthetic resin or metal.

As described above, the hub bolt 3 attached to the brake drum 2 and inserted into the hub bolt hole 1 a of the hub 1 is fitted into the hub bolt hole 4 a of the wheel disc 4 so that the wheel bolt 4 is attached to the hub bolt 3. After mounting, the wheel nut 5 with the washer 6 is screwed onto the hub bolt 3 and tightened.

Thus, the brake drum 2 and the wheel disc 4 are attached to the hub 1 by the hub bolt 3 and the wheel nut 5 with the washer 6 interposed. In order to reduce the frictional resistance at the time of fastening, The oil is applied to the contact surface of the washer 6 with the wheel disc 4 and the female screw surface of the wheel nut 5 as in the conventional case.

Next, the nut 7 fixed in the cap 8 is screwed onto the extension bolt portion 3b of the hub bolt 3, and the cap 8 is tightened until the end surface of the cap 8 is pressed against the wheel disc 4. The cap 8 is attached to the extension bolt portion 3b.

Since the cap 8 is an inner cavity, the wheel nut 5 and the washer 6 are housed in the inner cavity and are not exposed to the outside from the surface of the wheel disc 4, so that dust may be attached to this. There is no.

Furthermore, since the cap 8 is pressed against the surface of the wheel disk 4, even if the oil applied to the surface of the washer 6 and the wheel nut 5 tries to flow out from the applied portion to the outside, Since the oil is prevented from flowing out of the cap 8 at the end surface of the wheel 8, the wheel disc 4 is prevented from being contaminated due to the dust adhering to the flowing oil.

[0021]

[Effect of device]

 As described above, according to the present invention, the wheel nut and the washer which are oiled and fastened to the hub bolt are covered by the cap screwed to the extension bolt portion of the hub bolt and exposed to the outer surface of the wheel disc. There is no.

Moreover, even if the amount of oil applied to the wheel nut and washer is large and the oil is about to fall off, it does not flow out of the cap because the end face of the cap is in close contact with the wheel disc.

Therefore, since the oil does not overflow or flow out while the vehicle is traveling, etc., dust does not adhere to the oil and contamination due to the adhesion of dust can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

[Explanation of symbols]

 1 Hub 2 Brake Drum 3 Hub Bolt 3b Extension Bolt 4 Wheel Disc 5 Wheel Nut 6 Washer 7 Nut 8 Cap

Claims (1)

[Scope of utility model registration request] 1. A structure for mounting a brake drum and a wheel disc to a hub, wherein the brake drum and the wheel disc are fixed to the hub by the hub bolt and a washer and a wheel nut attached to the hub bolt. Extending the tip of the hub bolt that is attached to the extended tip bolt portion, screw a cap provided with an internal thread inside, and with the cap, the washer attached to the hub bolt exposed to the outside of the wheel disc and The structure for mounting the brake drum and wheel disc to the hub, which is characterized by covering the wheel nut.