JPH06179301A - Cap for wheel nut - Google Patents

Abstract

PURPOSE:To provide a wheel nut cap which is easy to attach and detach and does not fall off at the time of use by constituting the cap of a hollow hexagonal cap body having a mounting section on inner side top, and a corrugated leaf spring having a claw at one end and an engagement section at the other end. CONSTITUTION:A cap 1 is constituted of a hexagonal resin cap body 2 with the inside thereof formed to be hollow, and a corrugated leaf spring 3. In addition, the cap body 2 has mounting sections 5 integrated with the inner top of each wall 4 constituting a hexagonal form for mounting a leaf spring 3. Also, the mounting sections 5 are box type with an insertion hole 6 for laying the spring 3 at the lower section thereof. The sections 5 are laid at equal intervals on three of the walls 4 constituting the hexagonal form. In this case, the spring 3 has a curved engagement section 7 at one end for insertion into the mounting sections 5 of the cap body 2, and a claw 9 at the other end for engagement with a wheel nut 8. The spring 3 has a stem section 10 for contact with the side of the nut 8 approximately at the lengthwise center thereof, and is so formed as to have a corrugation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel nut cap used to cover a wheel nut for mounting an automobile wheel on an axle of an automobile.

[0002]

2. Description of the Related Art A wheel nut for fixing an automobile wheel to an axle of an automobile has a seat surface having a spherical surface or a tapered surface that abuts on a nut seat of the wheel, and a hexagonal head inserted into a socket of a nut tightening tool. It consists of a threaded portion formed through the central portion.

When a wheel is fixed to an automobile using the above wheel nut, water or mud may enter the gap between the wheel nut and the bolt to damage the screw part, or the wheel nut and the bolt may become rusted and become immobile. It was

Therefore, a cap has been conventionally used for the purpose of preventing the infiltration of water or mud. The above cap, as proposed in Jpn.
The structure is such that the spring member is fitted on the inner wall surface of the resin cap, and the wheel nut is sandwiched between the spring member and the rib. Further, as shown in FIG. 5, a metal cap having a hexagon
It has been considered that a part of the inside of 12 is bulged to form a tightening portion 13 and the side surface of the wheel nut is crimped by the above-mentioned tightening portion 13 to fix the cap to the wheel nut 8.

[0005]

Among the conventional caps described above, in the structure in which the wheel nut is clamped by the leaf spring, the gripping force for gripping the cap on the wheel nut is weak and the cap may fall off during traveling. there were. Further, if the gripping force of the leaf spring is increased, it is difficult to attach and detach the cap.

Further, in the case where the metal cap is provided with the tightening portion, when the cap is mounted, the cap body is deformed and fitted into the nut, so that it is difficult to fit and a special tool is required for removal. However, there is a problem that it takes time to attach and detach the cap.

The present invention has been made in order to eliminate the above-mentioned problems, and an object thereof is to obtain a cap which is easy to put on and take off and which does not fall off during use.

[0008]

SUMMARY OF THE INVENTION The present invention has a cap body having a hexagonal shape with a hollow inside and a mounting portion provided at the top of the inner wall surface, a claw portion at one end, and a hook portion at the other end. The present invention provides a cap for a wheel nut, which is composed of a corrugated plate spring having a stop portion, and in which the locking portion of the leaf spring is inserted and arranged in the mounting portion of the cap body.

[0009]

When the cap of the present invention is mounted, by pushing the cap in alignment with the hexagonal head of the wheel nut, the leaf spring hits the side surface of the wheel nut and is expanded outward, so that the cap slides in smoothly and is mounted. it can. The claw portion of the leaf spring is engaged and fixed to the lower surface of the head portion of the wheel nut in a state of being press-fitted to a predetermined position. As described above, the cap of the present invention can be securely fixed to the wheel nut.

When removing the cap, the leaf spring is expanded outward by the hexagonal top surface of the wheel nut by twisting the cap, and at the same time, the engagement of the claw portion of the cap with the wheel nut is released. It can be easily removed by pulling it out.

[0011]

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

As shown in FIGS. 1 to 4, the cap 1 is composed of a resin cap body 2 having a hexagonal shape with a hollow interior and a leaf spring 3 having a corrugated plate shape.

The cap body 2 has a mounting portion 5 for mounting the leaf spring 3 on the inner top of a wall surface 4 forming a hexagonal shape.
Have integrally.

The mounting portion 5 has a box shape having an insertion opening 6 for inserting the leaf spring 3 below, and is equidistant on three wall surfaces 4 out of the wall surfaces 4 forming a hexagon. Are arranged as follows. The mounting portion 5 is preferably provided close to the corner portion of the wall surface 4, but when the wide leaf spring 3 is used, the mounting portion 5 can be arranged closer to the central portion. Further, the mounting portions 5 are not limited to three places, but can be provided on one to six wall surfaces.

The leaf spring 3 has a curved locking portion 7 which is inserted into the mounting portion 5 of the cap body 2 at one end and a claw portion 9 which is engaged with a wheel nut 8 at the other end. ing. An abdomen 10 that abuts the side surface of the wheel nut 8 is provided at a substantially central portion in the longitudinal direction of the leaf spring 3, and is formed in a corrugated plate shape.

In the leaf spring 3 formed as described above, the locking portion 7 is detachably inserted into the mounting portion 5 of the cap body 2 and is fixed to the mounting portion 5 by the spring action of the locking portion 7. .

It should be noted that the inside of the cap body 2 is preferably formed to be large similarly to the wheel nut 8 so that it can be rotated about 3 to 10 degrees while being inserted into the wheel nut 8. is there.

In this embodiment, the cap body 2 is made of AB.
Although the resin is molded using S resin, other resin may be used, and it may be formed of aluminum alloy, stainless steel, or the like, and the hemispherical convex portion 11 is provided on the head. It can also be formed.

Further, the leaf spring 3 is formed of spring steel, and in the above-mentioned embodiment, the leaf spring 3 is inserted and attached to the attaching portion 5, but it may be inserted and integrally formed when forming the cap.

Next, the cap 1 configured as described above.
The mounting method of will be described.

As shown in FIGS. 3 and 4, the cap 1
When the wheel nut 8 is attached to the wheel nut 8, the cap 1 is pushed in so as to cover the wheel nut 8 from above, and the claw portion 9 of the cap 1 is locked and fixed to the lower surface of the wheel nut 8. For this reason, the cap 1 does not come off at all due to the vibration of the wheels.

When the cap 1 is removed, by rotating the cap 1 in the direction of arrow A, the leaf spring 3 provided on the cap 1 comes into contact with the hexagonal corner portion of the wheel nut 8, which causes the leaf spring 3 to move. The cap 1 is pushed out to the wall surface side, and at the same time, the claw portion 9 of the leaf spring 3 is disengaged from the wheel nut 8. By pulling out the cap 1 in this state, the cap 1 can be easily removed from the wheel nut 8.

[0023]

According to the present invention, since the claw portion of the leaf spring is locked to the wheel nut at the time of use because of the above structure, a strong locked state can be obtained. When removing, the leaf spring is expanded outward at the corners of the wheel nut by turning the cap, and at the same time, the engagement of the claw with the wheel nut is released. be able to.

As described above, even though a strong locking state is obtained during use, it has an excellent effect that it can be easily removed by a simple operation without using a removal tool at the time of removal. It is a thing.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a cap of the present invention.

FIG. 2 is a perspective view illustrating the internal structure of an embodiment of the cap of the present invention.

FIG. 3 is a vertical cross-sectional view illustrating a usage state of the cap of the present invention.

FIG. 4 is a cross-sectional view illustrating a usage state of the cap of the present invention.

FIG. 5 is a cross-sectional view illustrating a conventional cap.

[Explanation of symbols]

 1, 12 Cap 2 Cap body 3 Leaf spring 4 Wall surface 5, 13 Mounting part 6 Insertion port 7 Locking part 8 Wheel nut 9 Claw part 10 Abdominal part 11 Hemispherical convex part

Claims (1)

[Claims] 1. A corrugated plate having a hexagonal shape with a hollow inside, a cap body having a mounting portion at the top of the inner wall surface, a claw portion at one end, and a locking portion at the other end. A wheel nut cap, characterized in that the leaf spring engaging portion is inserted into the mounting portion of the cap body.