JPH09188101A - Wheel for passenger car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wheel for passenger cars, which is capable of reducing room noise without essentially changing the wheel material and construction conventionally used. SOLUTION: Rim flanges 4a, 5a of rims 4, 5 are covered with vibration damping rubbers 13a, 13b respectively from the inner wall face to the outer wall face. Then, vibration damping rubbers are respectively attached to the abutting faces of bolts 6 for fixing a disk 3 to the circular rims 4, 5, and the abutting faces of nuts 7. Further, a vibration damping rubber is inserted between an opening 3a of the shaft center part of the disk 3 and a center cap 10. Out of boltholes of two types of P. C. D.(pitch circle diameter), boltholes 9a of P. C. D.=L1 are used for fixing a wheel to an axle, and vibration damping rubbers are respectively attached to the abutting faces of bolts 11 for stopping up the other boltholes of P. C. D.=L2, and the abutting faces of nuts 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wheel for a passenger car, and more particularly to a wheel for a passenger car in which vibration transmitted from a tire to the wheel is reduced to reduce noise in the vehicle.

[0002]

2. Description of the Related Art When a vehicle travels on a rough road surface, in-vehicle noise called road noise may occur. This in-vehicle noise is generated by the vibration picked up by the tire from the road surface being transmitted to the axle via the wheel and transmitted from the suspension to the body, causing the vehicle interior to resonate.

When frequency analysis of this in-vehicle noise is performed, it is 10
Since it is in the band of 0 to 400 Hz, as a conventional vehicle interior noise reduction measure, the primary natural frequency of the tire has been mainly reduced below the band. For example,
Typical examples include increasing the tread rubber mass of a tire and decreasing the vertical spring constant of the sidewall portion. However, changing the configuration of the tire affects the running performance of the tire, so it cannot be said that the improvement is necessarily satisfactory.

[0004]

Therefore, in place of the improvement from the tire as described above, in JP-A-4-38202, the wheel noise is reduced by making the wheel from a damping steel plate. Is proposed. However, the wheels proposed above are inevitably costly because the materials and structures must be completely changed.

It is an object of the present invention to provide a passenger car wheel which can reduce the noise in the vehicle without essentially changing the material or structure of the conventionally used wheel.

[0006]

In order to achieve the above object, the present invention is a wheel having an annular rim on the outer periphery of a disk, in which a vibration absorbing rubber is attached to the rim flange of the rim from the inner wall surface to the outer wall surface. It is characterized by that. Further, according to another aspect of the present invention, in a wheel in which an annular rim is fixed to the outer periphery of a disk with a bolt and a nut, vibration absorbing rubbers are attached to the contact surface of the bolt and the contact surface of the nut, respectively. To do.

Still another aspect of the present invention is a wheel in which an annular rim is provided on the outer periphery of a disc, an axial center portion of the disc is opened, and a center cap is fitted in the opening, the opening and the center are provided. It is characterized in that a vibration absorbing rubber is interposed between the cap and the cap. Still another aspect of the present invention is to provide an annular rim on the outer circumference of the disc and a plurality of bolts along a plurality of different pitch circle diameters (P.C.D.) at a portion for fixing the disc to the axle. A hole is provided, which is used for fixing to the axle. C. D. Other than the bolt holes of P. C. D. In the wheel for sealing the bolt hole of the bolt with a bolt and a nut, vibration absorbing rubbers are attached to the contact surface of the bolt and the contact surface of the nut, respectively.

With such a structure, the transmission of the vibration transmitted from the tire to the wheel or the transmission transmitted from the wheel to the axle is reduced without significantly changing the structure or material of the conventional wheel. In-vehicle noise can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on an embodiment shown in the drawings. 1 and 2 show a state in which a tire 2 is attached to a passenger car wheel 1 of the present invention. The wheel is formed in a disc shape, and an outer rim 4 and an inner rim 5 are fixed to the outer peripheral edge of the wheel at a constant pitch by a plurality of bolts 6 and nuts 7. Further, the disc 3 and the annular outer rim 4 and the annular inner rim 5 are welded by a welded portion 8.

Further, an opening 3a is formed in the axial center portion of the disk 3.
The center cap 10 is provided in the opening 3a for the purpose of preventing foreign matter from entering and decoration. The center cap 10 is made of a light alloy such as plastic or aluminum and has a decorative design. Further, a plurality of bolt holes 9 for fixing to the axle are provided on the outer peripheral portion of the opening 3a of the disk 3 with a predetermined pitch circle diameter (PCD).

As shown in FIG. 3, the P.P. C. D. A plurality of P.s. C.
D. And P2 of L2. C. D. And two types are provided. C. D. There are four bolt holes 9a in the P.
C. D. Has another 4 bolt holes 9b on the center
They are provided 5 degrees apart. Although the material and structure of the wheel structure described above are essentially the same as those of the existing wheel, the present invention further uses the rim flanges 4a of the rims 4 and 5,
Vibration absorbing rubbers 13a and 13b are respectively covered from the inner wall surface where the tire bead is in contact with 5a to the outer wall surface.

Vibration absorbing rubbers 13c and 13d are attached to the contact surfaces of the bolt 6 and the nut 7 for fixing the disk 3 and the annular rims 4 and 5, respectively. Further, a vibration-absorbing rubber 13e is inserted between the center cap 10 and the opening 3a at the axial center of the disc 3. In addition, there are two types of P. C. D. Among the bolt holes of L.P. C. D. The bolt hole 9a of P. is used for fixing to the axle, and the other P. C. D. = L2 of the bolt hole 9b is sealed by a decorative dummy bolt 11 and nut 12. Vibration absorbing rubbers 13f and 13g are provided on the contact surface of the bolt 11 and the contact surface of the nut 12, respectively, which seal the bolt hole 9b.
Is attached.

As the vibration absorbing rubber used in the present invention, a soft rubber having a low hardness is preferable, and a rubber or a plastic having a large tan δ (loss tangent) such as styrene-butadiene rubber (SBR) is particularly preferable. Vibration absorbing rubber is 13
When it is provided in the form of a film or sheet like a to 13 g, the thickness is 0.1 to 2.0 mm, preferably 0.2 to 0.5 mm.

As described above, it is desirable that the vibration-absorbing rubbers 13a to 13g provided at a plurality of locations on the wheel are provided at all locations as shown in the figure, but at least one location or any two locations is provided. You may make it selectively arrange | position at more than one place. In the embodiment described above, as the wheel model, the disk and the rim are separately molded, and the case where they are fixed by welding and bolting has been described, but the wheel integrally cast from a light alloy such as aluminum and magnesium is also applicable. Can be applied.

Vibration absorbing rubber 13 coated on the rim flange
It is desirable that a and 13b extend at least to the region reaching the tire heel portion, but it is not preferable to extend them to the tire bead base portion in terms of fitting to the rim of the tire. In addition, the outer wall surface may extend significantly from the flange portion to the vicinity of the disc joint portion.

[0016]

As described above, according to the passenger car wheel of the present invention, the vibration transmitted from the tire to the wheel can be achieved without largely changing the material and structure of the conventional wheel.
Alternatively, it is possible to reduce the transmission of the vibration transmitted from the wheel to the axle and reduce the noise in the vehicle.

Further, in the case of the wheel of the present invention in which the vibration absorbing rubber is attached to the inner wall surface and the outer wall surface of the rim flange, the vibration absorbing rubber of the outer wall surface of the rim flange prevents the rim flange from being damaged when it comes into contact with a curbstone or the like. Can be protected. Further, by selecting materials of various colors as the vibration absorbing rubber to be attached to the outer wall surface, it is possible to take a decoratively aesthetic form.

Further, in the case of the wheel of the present invention in which a vibration-absorbing rubber is attached between the opening of the axial center portion of the disk and the center cap fitted into the opening, the center cap can be firmly fixed.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which a tire is mounted on a wheel of the present invention.

FIG. 2 is an enlarged vertical sectional view of a main part of FIG.

FIG. 3 is a side view showing a portion of the wheel shown in FIG.

[Explanation of symbols]

1 wheel 2 tire 3 disc 3a opening
4 Outer rim 4a Rim flange 5 Inner rim 5a Rim flange 6 Bolt 7 Nut 9, 9a, 9b Fixing bolt hole 10 Center cap 11 Bolt 12 Nut 13a-13g Vibration absorbing rubber

Claims (4)

[Claims] 1. A wheel for a passenger vehicle, wherein a disk is provided with an annular rim on an outer circumference thereof, and a vibration-absorbing rubber is attached to a rim flange of the rim from an inner wall surface to an outer wall surface. 2. A wheel for a passenger vehicle in which a ring-shaped rim is fixed to the outer periphery of a disk by bolts and nuts, and vibration absorbing rubbers are attached to the contact surface of the bolt and the contact surface of the nut, respectively. 3. A wheel in which an annular rim is provided on the outer periphery of a disc, a shaft core portion of the disc is opened, and a center cap is fitted in the opening, a vibration absorbing rubber is provided between the opening and the center cap. An intervening passenger car wheel. 4. An annular rim is provided on the outer periphery of the disk, and a plurality of bolt holes are provided along a plurality of different pitch circle diameters (PCD) in a portion for fixing the disk to an axle. P. used to fix the axle. C. D. Other than the bolt holes of P. C. D. A wheel for sealing the bolt hole of the above with a decorative bolt and a nut, wherein a vibration absorbing rubber is attached to each of the contact surface of the bolt and the contact surface of the nut.