JP2007276784A - Automobile wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automobile wheel capable of suitably retaining weight balance in a wheel circumferential direction when an air valve integrally formed with an air pressure detection device is attached. <P>SOLUTION: The automobile wheel is made into a constitution that hole intervals h1-h6 of successively adjacent decoration holes 7a-7g on a disc 3 are gradually spread from a valve hole 18 toward an opposite position in such a state that it is fitted to a rim 2. Therefore, when the air valve 20 integrally formed with the air pressure detection device 21 is attached to the valve hole 18, it can be made into the weight-balanced state almost balanced over the circumferential direction, and good vibration characteristic, operation stability or the like can be exhibited in traveling of the automobile. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an automobile wheel including a disk and a rim, and more particularly to an automobile wheel for mounting an air valve provided with an air pressure detecting device for detecting an air pressure of a tire.

  In an automobile wheel, generally, a rim for mounting a tire is provided with a valve hole for mounting an air valve for injecting air into the tire, and a hub hole is formed at the center. In addition, a plurality of decorative holes are arranged at equal intervals in the circumferential direction and located outside the hub hole in the radial direction. Here, the decorative hole provided in the disk is configured to exhibit an effect of radiating heat generated from the brake as well as reducing the weight of the wheel and improving the design.

  On the other hand, in order to maintain each performance such as driving performance, safety, durability, and fuel consumption of a vehicle at a desired level, it is necessary that the tire air pressure be maintained at an appropriate pressure. Therefore, in recent years, there has been an increasing demand for disposing an air pressure detecting device for detecting the tire air pressure. This air pressure detecting device is generally configured as an integrated form joined to an air valve, and the air valve is mounted in the valve hole of the rim so as to be arranged in the tire. is there.

  When an air valve that is integrated with the air pressure detecting device as described above is mounted in a valve hole of an automobile wheel, the weight of the air valve is locally increased by the weight of the air pressure detecting device. For this reason, the weight balance in the circumferential direction of the automobile wheel is lost. When a tire is attached to such a wheel and assembled to a car, vibration characteristics and maneuverability during driving of the car are lowered, and the ride comfort is also adversely affected. For this reason, various methods have been proposed for renewing the weight imbalance caused by the air valve mounting. For example, there is a method of attaching a balance weight equal to the weight of the air valve at a position opposite to the valve hole, or a method of reducing or eliminating a decoration hole existing in the disk at a position opposite to the valve hole (for example, Patent Document 1). Proposed.

Japanese Patent Laid-Open No. 2002-240501

  By the way, as described above, in the configuration in which the balance weight is attached to the position opposite to the valve hole, or in the configuration in which the decoration hole is made smaller or eliminated, it is relative to the increase in the weight of the air valve integrated with the air pressure detection device. Since the weight to be added is added to the opposite position, the weight balance is maintained in the direction connecting the mounting position of the air valve and the opposite position. However, the weight distribution in the circumferential direction of the wheel is such that the weight in the symmetric region between the mounting position of the air valve and the opposite position increases locally, and the weight balance is kept uniform in the circumferential direction of the wheel. It is not supposed to be. Therefore, when a tire is assembled on a wheel equipped with such an air valve and mounted on an automobile, the unbalanced state in the circumferential direction with respect to the rotating shaft (axle) is sufficiently eliminated during traveling. As a result, there was a limit to the vibration characteristics and maneuverability that the car can exhibit.

  The present invention solves such a problem and proposes an automobile wheel that can maintain the weight balance in the circumferential direction of the wheel properly even when an air valve that is integrated with the air pressure detection device is mounted.

  The present invention includes a rim provided with a valve hole for mounting an air valve for injecting air into a tire, a hub hole formed at the center, and a plurality of decorative holes extending in the circumferential direction on the outer side in the radial direction of the hub hole. In an automotive wheel comprising a disk disposed, the decorative hole is spaced from the position of the valve hole toward the opposite position of the valve hole with respect to the center of the automotive wheel. It is formed so that it may be expanded gradually.

  In such a configuration, from the position where the valve hole is disposed, toward the opposite position with respect to the center of the wheel, by gradually increasing the interval between the decorative holes adjacent to each other, in the circumferential direction of the wheel, In the region near the position where the valve hole is relatively formed, the weight is lighter, and in the region near the opposite position where the decorative hole is formed, the weight is heavier. Therefore, a weight distribution in which the weight gradually increases from the valve hole arrangement position toward the opposite position can be generated in the wheel. By having such a weight distribution, the local weight increase due to the air valve integrated with the air pressure detection device mounted in the valve hole is offset by the weight of the wheel gradually increasing toward the opposite position. Since a balanced state can be obtained, it is possible to form a balanced state that is almost uniform in the circumferential direction. Thus, even when an air valve that is integrated with the air pressure detection device is installed and installed in an automobile, a proper balance is maintained in the wheel circumferential direction when driving, and excellent vibration characteristics and operability are achieved. Etc. can be exhibited. In addition, in the automobile wheel having such a configuration, it is only necessary to form a decorative hole having the same shape, unlike the conventional configuration in which the shape of the decorative hole is changed in the manufacturing process. Moreover, the outstanding advantage that the increase in the manufacturing cost concerning a metal mold | die etc. can be suppressed also arises.

  Such a decoration hole is configured to be disposed at a position that is symmetrical with respect to a center line that connects the position where the valve hole is disposed and the opposite position. In such a configuration, the decoration holes are arranged so that the hole intervals gradually expanding are the same on the left and right sides from the valve hole arrangement position to the opposite position. Thereby, the above-described weight distribution increasing from the valve hole arrangement position toward the opposite position is made equal on both the left and right sides with respect to the center line connecting the valve hole arrangement position and the opposite position. Therefore, when an air valve integrated with the air pressure detection device is mounted, the weight balance of the wheel can be made more uniform in the circumferential direction. Thus, an automobile equipped with the wheel can exhibit its vibration characteristics and maneuverability more appropriately. Moreover, the decorative surface formed by gradually widening the hole interval as in such a configuration can exhibit an excellent design property that the wheel has no design surface.

  In the present invention, the decorative hole is formed so as to gradually widen the interval between the decorative holes from the position of the valve hole toward the opposite position of the valve hole with respect to the center of the automobile wheel. Because it is an automotive wheel, the wheel has a weight distribution that gradually increases in weight from the valve hole position toward the opposite position in the circumferential direction of the wheel. When an air valve that is integrated with the apparatus is attached to the valve hole, a weight balance state that is substantially uniform in the circumferential direction can be achieved. Thus, even when this air valve is mounted and assembled in an automobile, excellent vibration characteristics, maneuverability, etc. can be exhibited during traveling. Moreover, in the manufacturing process of the automobile wheel having such a configuration, an excellent advantage that an increase in manufacturing cost required for a mold or the like can be suppressed is also produced.

  Here, the decoration hole is arranged at a position that is symmetrical with respect to the center line that connects the valve hole arrangement position and the opposite position thereof, and therefore is opposite from the valve hole arrangement position. Since the wheel weight distribution is equal on both the left and right sides toward the position, when the air valve that is integrated with the air pressure detection device is installed, the weight balance of the wheel is more evenly distributed in the circumferential direction. Therefore, an automobile equipped with the wheel can exhibit its vibration characteristics and maneuverability more appropriately. In addition, the decorative holes formed by gradually widening the hole interval in this way can exhibit an excellent design that is not present in the design surface of the wheel.

Embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a longitudinal sectional view showing a so-called two-piece type automobile wheel 1 comprising a steel rim 2 and a disk 3 having a hub hole 4 at its center. In such an automobile wheel 1, after the disc flange portion 11 of the disc 3 is fitted on the inner peripheral surface of the drop portion 16 of the rim 2, the drop portion 16 and the disc flange portion 11 are arc-welded, spot-welded, or laser-welded. They are joined and integrated by various welding methods such as welding.

  The rim 2 is formed with rim flanges 12 and 13 for supporting the side wall portions 26 and 26 (see FIG. 2) of the tire 25 at the opening edges on both sides. The outer bead seat 14 for seating the bead 27 (see FIG. 2) of the tire 25 is coupled to the inside of the rim flange 12, and the bead 27 of the tire 25 is seated on the outside of the inner rim flange 13. The inner bead sheet part 15 to be made is coupled. Further, between the outer bead seat portion 14 and the inner bead seat portion 15, a drop portion 16 for dropping the bead 27 of the tire 25 when the tire is mounted is a well portion 17 that rises from the drop portion 16 in the wheel radial direction, 17 is provided. Here, the well portion 17 on the outer side of the wheel is provided with a valve hole 18 for mounting an air valve 20 (see FIG. 2) penetrating into and out of the rim 2 at a predetermined position in the circumferential direction of the wheel. .

  FIG. 2 shows a state in which an air valve 20 is mounted in the valve hole 18 of the automobile wheel 1. Here, an air pressure detecting device 21 is joined to the air valve 20, and the air valve 20 is integrated with the air pressure detecting device 21. The air pressure detection device 21 is arranged along the outer peripheral surface of the drop portion 16 of the rim 2 so as not to contact the drop portion 16. Thus, after the air valve 20 is mounted, the tire 25 is assembled. In the air pressure detecting device 21, a pressure sensitive element (not shown) for detecting the air pressure in the tire 25 and a transmission for transmitting a detection signal detected by the pressure sensitive element to a receiving device mounted on the automobile. And a device (not shown). Here, as the pressure sensitive element, a strain generated by the pressure applied to the sensor unit is electrically taken out, and the pressure can be detected by the strain. That is, the air pressure of the tire 25 can be detected by detecting the pressure state in the tire by the pressure sensitive element.

Next, the main part of the present invention will be described.
In the present embodiment, the hole intervals h1 to h6 of the decorative holes 7a to 7g that are sequentially adjacent to the disk 3 are gradually expanded from the valve hole 18 toward the opposite position in a state of being fitted to the rim 2. The configuration is as follows. Hereinafter, exemplary embodiments will be described in detail.

  FIG. 3 is a plan view seen from the outside (design surface side) of the automobile wheel 1. A hub hole 4 is formed at the center of the disk 3 of the vehicle wheel 1 so as to be fitted into an axle protruding from the hub of the vehicle. Four bolt holes 6 are formed at equal intervals. Further, a raised portion 8 (see FIG. 1) is formed so as to rise from the outer side in the radial direction of the bolt hole 6 toward the outer side in the wheel axis direction. A hub mounting surface 10 (see FIG. 1) that is connected to the hub is formed. The raised portion 8 plays a role of improving design properties, improving rigidity, and the like. A disk shoulder 9 is formed on the outer side in the radial direction of the raised portion 8 so as to incline toward the inner side in the wheel axial direction. Further, a disk flange portion 11 (see FIG. 1) that is coupled to the disk shoulder portion 9 and is substantially parallel to the wheel axial direction is formed along the circumferential direction.

  Here, the disk 3 of the automobile wheel 1 is provided with twelve decorative holes 7a to 7g in the disk shoulder portion 9, substantially concentrically from the center of the wheel. Here, in this embodiment, these twelve decorative holes 7a to 7g have substantially the same shape, and the hole intervals h1 to h6 between the adjacent decorative holes are set to the decorative holes 7a to 7g. It is set as the distance between the hole centers. A decorative hole 7a is formed on a radial line connecting the wheel center Z and the valve hole 18 formed in the rim 2 in a state where the disk 3 and the rim 2 are fitted. A decoration hole 7g is formed at a position opposite to the wheel center Z of the decoration hole 7a on a radial line connecting the opposite position X of the valve hole 18 with respect to the wheel center Z and the wheel center Z. And from this decoration hole 7a to the decoration hole 7g, the decoration holes 7a-7g are each formed so that the hole space | interval h1-h6 between adjacent decoration holes may spread gradually. In addition, the decorative holes 7b to 7f are provided so as to be symmetric with respect to the center line Y connecting the valve hole 18 and the opposite position X. That is, the decoration hole 7b is located at a hole interval h1 from the decoration hole 7a on the same radial line as the valve hole 18 toward the decoration hole 7g on the left and right sides of the center line Y and on the same radial line as the opposite position X. , 7b are formed. Further, decorative holes 7c and 7c are formed at the positions of the hole interval h2 from the decorative holes 7b and 7b on the left and right sides toward the opposite position X, respectively. Similarly, decorative holes 7d, 7e, and 7f are formed at positions corresponding to the hole intervals h3, h4, and h5 on the left and right sides of the center line Y, respectively. The space between the decoration hole 7f and the decoration hole 7g is a hole interval h6. Here, the hole interval h1 between the decorative holes 7a and 7b, the hole interval h2 between the decorative holes 7b and 7c, the hole interval h3 between the decorative holes 7c and 7d, the hole interval h4 between the decorative holes 7d and 7e, and the decorative hole 7e. And the distance between the holes 7f and 7f, and the distance h6 between the decorative holes 7f and 7g.

  Here, this embodiment has the same configuration as that of the first embodiment described above except that the decorative holes 7a to 7g having the same hole diameter are formed so that the hole intervals h1 to h6 are gradually expanded. The same symbols are used for the parts, and the description is omitted.

  In the automotive wheel 1 in which the decoration holes 7a to 7g are formed in this way, since the formation ratio of the decoration holes is relatively large in the region around the position where the valve hole 18 is disposed, the weight is a light region, On the contrary, in the region around the opposite position X, the formation rate of the decoration hole is relatively small, so that the region is heavy. In the circumferential direction of the wheel, the weight distribution gradually increases on both the left and right sides of the center line Y from the position where the valve hole 18 is disposed toward the opposite position X. Therefore, the vehicle wheel 1 alone has an inclined weight distribution in which the weight increases from the position where the valve hole 18 is disposed toward the opposite position X, as in the above-described embodiment, and the weight unbalanced state. Become.

  When an air valve 20 that is integrated with the air pressure detection device 21 is installed in the valve hole 18 of the automobile wheel 1, the area locally increases in weight due to the weight of the air valve 20 and the air pressure detection device 21. Will be. Here, the automotive wheel 1 is formed with decorative holes 7a to 7g formed by gradually expanding the hole intervals h1 to h6. A weight distribution that gradually increases in weight toward X is formed. Therefore, the local weight increase due to the mounting of the air valve 20 is offset by the weight gradually increasing toward the opposite position X, and a state in which the weight is balanced is formed. As a result, the automobile wheel 1 to which the air valve 20 that is integrated with the air pressure detection device 21 is mounted can be in a balanced state that is substantially uniform in the circumferential direction. Thus, in the same manner as in the first embodiment described above, in an automobile equipped with the automobile wheel 1 in which the weight balance is properly maintained in the circumferential direction, the vibration characteristics and the maneuverability at the time of traveling are appropriate at a high level. It becomes possible to demonstrate to.

  Further, in such an automobile wheel 1, the decoration holes 7a to 7g are formed by gradually widening the hole intervals h1 to h6, respectively, and therefore the surface form by the decoration holes 7a to 7g. However, there is also an excellent advantage that it is possible to exhibit a novel design that has never been seen.

  On the other hand, in the steel automobile wheel 1 of the present embodiment, the disk 3 is formed by a general press process, and when the decorative holes 7a to 7g of the press process are processed, It is possible to use a processing jig having the same shape as the conventional one. Therefore, there is also an excellent advantage that an increase in manufacturing cost required for new processing jigs, processing steps, and the like can be suppressed.

  In the embodiment described above, the decoration hole 7a is formed on the radial line connecting the wheel center Z and the valve hole 18, and the decoration hole 7g is formed at a position opposite to the wheel center Z. However, as another configuration, a configuration in which no decoration hole is formed on the center line Y connecting the valve hole 18 and the opposite position X with respect to the wheel center Z may be employed. For example, a decorative hole may be formed at a position displaced from the valve hole 18 by a predetermined angle, and a plurality of decorative holes may be formed so that the hole interval gradually increases in the direction opposite to the valve hole 18. Even in such a configuration, the weight increase caused by the air pressure detection device 21 and the air valve 20 integrated with the air pressure detection device 21 can be balanced by the weight distribution in the wheel circumferential direction, as in the above-described embodiment. Therefore, it is possible to form a weight balance state that is substantially uniform in the circumferential direction.

  In addition, the present embodiment has a weight distribution in the circumferential direction of the wheel so as to balance the weight increase due to the mounting of the air valve 20 that is integrated with the air pressure detecting device 21, but an appropriate weight balance is maintained. As shown in the drawing, the adjacent hole intervals h1 to h6 of the decoration holes 7a to 7g are set in detail by a method such as an equal number sequence ratio or a ratio sequence ratio that increases at a predetermined rate, for example, a constant interval. You can also Further, in the automobile wheel 1 according to the present embodiment, even when the weight of the air valve 20 and / or the air pressure detection device 21 is changed, or when a different weight is attached, etc. Since the balance of the wheel can be appropriately maintained only by attaching a lightweight balance weight, the above-described excellent vibration characteristics and maneuverability can be exhibited relatively easily.

  Furthermore, in the above-described embodiment, the air valve 20 that is integrated with the air pressure detection device 21 is mounted, but the air valve 20 and the air pressure detection device 21 are not joined, Even in the case of a structure that is separately mounted, by mounting the air pressure detection device 21 in the vicinity of the position where the valve hole 18 is disposed, the above-described operational effects of the present invention are appropriately exhibited. .

  The present invention can be applied not only to the steel automobile wheel 1 used in the above-described embodiment, but also to an aluminum wheel, a magnesium wheel, and a FRM (fiber reinforced metal) wheel. Furthermore, the present invention can be applied to a wheel formed by various manufacturing methods such as casting in addition to a manufacturing method by press working. In addition to the configuration in which the decorative hole is a circular hole as in the above-described embodiment, the present invention can also be applied to a configuration in which the decorative hole has a substantially triangular shape.

1 is a longitudinal sectional view of an automobile wheel 1 according to an embodiment. It is explanatory drawing showing the state which mounted | wore the wheel 1 for motor vehicles with the air valve 20 and the tire 25 which are integrated with the air pressure detection apparatus 21. FIG. It is a top view of the wheel 1 for cars of the example of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Automotive wheel 2 Rim 3 Disc 7a-7g Decoration hole 18 Valve hole 20 Air valve 21 Air pressure detection device 25 Tire X Opposite position Y Center line Z Wheel center h1-h6 Hole spacing

Claims (1)

A rim provided with a valve hole for mounting an air valve for injecting air into the tire, and a hub hole is formed at the center, and a plurality of decorative holes are arranged along the circumferential direction outside the hub hole in the radial direction. In an automobile wheel consisting of a disk,
The decorative hole is formed so as to gradually widen the interval between adjacent decorative holes from the valve hole disposition position toward the opposite position of the valve hole with respect to the center of the automobile wheel.
Furthermore, the automotive wheel is characterized in that the decorative hole is disposed at a position symmetrical with respect to a center line connecting the position where the valve hole is disposed and the opposite position.

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