JPH0222322Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tire wheel disc having a so-called two-piece structure consisting of a center part as a strength member and an adapter part as a structural member.

Generally, a tire wheel is formed by joining a rim and a disk by welding the entire circumference, and the disk is manufactured by forging or casting into a predetermined size and shape depending on the vehicle type. It is attached to the axle by inserting the center hub and hub bolt into the center hole and hub bolt insertion hole, respectively, which are drilled in the hub contact surface formed in the center of the disk, and by screwing the nut into the hub bolt. It is designed to be attached to a hub. However, because the outer diameter and offset of the center hub differ depending on the vehicle model, tires and wheels that are compliant with a particular vehicle model often cannot be used on other vehicle models. For this reason, in order to increase the versatility of repair tires, the diameter of the center hole in the disc is made larger to match the vehicle model with the largest outer diameter of the center hub, and the taper nut is screwed onto the hub bolt. This is used to center the tire wheel when installing it on a vehicle. However, when the above-mentioned repair tire wheel is used for a vehicle model with a small outer diameter of the center hub, a gap is created between the inner wall of the center hole and the center hub, and this creates a gap between the hub bolt and the hub bolt insertion hole when installing the tire wheel on the vehicle. This makes positioning work complicated, and even with the tightening of the taper nut, highly accurate centering is difficult. Misalignment between the tire wheel and axle can be caused by steering wheel shake while driving, uneven tire wear, or bearing failure. This caused damage, etc., and became a serious problem for safe driving of vehicles. In addition, differences in offset depending on the vehicle model make it necessary to stock many types of tires and wheels for each vehicle model with different offsets, which places a heavy burden on inventory management. When installed, there was a problem in that the geometry changed, making the steering wheel unstable and significantly impeding the running safety of the vehicle.

This invention was developed in consideration of the above points, and it is easy to install the tire wheel on the vehicle, and the center hole diameter and offset can be freely adjusted to suit the vehicle model to be installed, and it is highly accurate. Tire and wheel discs that can be installed while preventing changes in centering and geometry, solve problems related to safe driving of vehicles, are highly versatile for various vehicle types, and also solve inventory management problems. The purpose is to provide.

In order to achieve the above object, the tire wheel disc of the present invention is composed of a center part and an adapter part which are formed separately, and the center part has a center hole in the center and a hub contact surface around the center hole. The adapter part has an insertion part whose outer diameter can be fitted into the center hole, and a step part having an upper surface that comes into contact with the hub abutting surface of the center part and a lower surface that serves as the hub abutting surface. and a center hub insertion hole drilled in the center, and the diameter of the center hub insertion hole of the adapter part can be fitted to the outer diameter of the center hub of the vehicle model to be installed, corresponding to each vehicle model to be installed. In addition, the thickness of the step part of the adapter part is set according to the vehicle type to which the adapter is installed, and the configuration allows the offset of the tire wheel to correspond to the vehicle type to which the adapter is installed. .

An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a sectional view showing a state in which a tire wheel disc according to an embodiment of the present invention is attached to a rim. In the figure, 1 is a tire wheel disc, 2 is a center part, 3 is an adapter part, 4 indicates a rim, and 5 indicates a tire wheel. Thus, the tire wheel disk 1 is composed of a center part 2 as a strength member and an adapter part 3 as a structural member, and a center hole 2a is bored in the center of the center part 2, and around the A hub contact surface 2b is formed. In order to increase the versatility of the disk 1, the center hole 2a and the hub contact surface 2b have dimensions that can fit into the center hub outer diameter of a vehicle model having the maximum center hub outer diameter, The hub contact surface 2b is set at an offset corresponding to the vehicle type having the maximum offset.

On the other hand, the adapter part 3 has an insertion part 3a whose outer diameter can be fitted into the center hole 2a, an upper surface 3b which contacts the hub contact surface 2b of the disk, and a lower surface which is the hub contact surface 3c. Part 3
d, and a center hub insertion hole 3e drilled in the center.
In addition, the hole diameter of the center hub insertion hole 3e has a size that can be fitted to the center hub outer diameter of the target vehicle model, and the offset of the hub contact surface 3c is determined by selecting the thickness of the stepped portion 3d. Therefore, the offset is made to correspond to the vehicle model to which it is installed. FIG. 2 shows an exploded cross-sectional view of the tire wheel 5 showing the coupling relationship of each member mentioned above. The center part 2 is joined to the rim 4 by welding the entire circumference, and the insertion part 3a of the adapter part is inserted into the center hole 2a. It is fitted in, abuts against the hub abutting surface 2b of the center portion, and is fixed with bolts 6 for assembly.

In the tire wheel 5 assembled as described above, a hub bolt (not shown) is inserted into the hub bolt insertion hole 7 that is bored on the same circumference with the center of the disk 1 as the center point, and the screw of the dedicated nut 8 is inserted. attached to the axle depending on the case.

As explained above, the tire wheel disc of the present invention has a two-piece structure consisting of a center part and an adapter part. The outer diameter of the center hub of
Since the thickness of d is set and the offset of the tire wheel can be set to match the vehicle model to which it is installed, it is possible to obtain a tire wheel disc that is compatible with various vehicle models by simply replacing the adapter part of the disc. , makes it easy to align the hub bolt and the hub bolt insertion hole when installing a wheel on a vehicle, and allows the center hole diameter and offset to be freely adjusted to suit the vehicle model to which it is installed, allowing for highly accurate centering and geometry. It can be installed to prevent changes, and eliminates various problems related to safe driving such as steering wheel wobbling, uneven tire wear, bearing damage, and fluctuations when turning the steering wheel, and by simply preparing various adapters. , various types of disks, or wheels can be obtained, and problems related to inventory management can also be solved.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a tire wheel constructed by joining a tire wheel disk according to an embodiment of the present invention to a rim, and Fig. 2 is an exploded cross-sectional view showing the connection relationship of each member in Fig. 1. It is a diagram. DESCRIPTION OF SYMBOLS 1... Tire wheel disk, 2... Center part, 2a... Center hole, 2b... Hub contact surface, 3... Adapter part, 3a... Insertion part,
3b...Top surface, 3c...Hub contact surface, 3d...Step portion, 3e...Center hub insertion hole.

Claims (1)

[Claims for Utility Model Registration] (1) Consisting of a center part and an adapter part, which are formed separately, the center part has a center hole in the center and a hub abutting surface around it, and The adapter part has an insertion part whose outer diameter can be fitted into the center hole, a step part having an upper surface that contacts the hub contact surface of the center part, a lower surface that serves as the hub contact surface, and a hole in the center. The diameter of the center hub insertion hole of the adapter part is set to a size that allows it to fit into the center hub outer diameter of the target vehicle, and the diameter of the center hub insertion hole of the adapter part is set to correspond to each vehicle model. Further, the tire wheel disc is characterized in that the thickness of the stepped portion of the adapter part is set in accordance with each vehicle model to which it is to be mounted, and the offset of the tire wheel can be set to correspond to the vehicle model to which it is to be mounted. (2) The hole diameter of the center hole in the center part and the offset of the hub contact surface are set to dimensions corresponding to the center hub outer diameter of the vehicle model with the maximum center hub outer diameter and the offset of the vehicle model with the maximum offset. A tire wheel disc according to claim 1 of the utility model registration.