JP2005153537A - Tire valve holder and vehicle wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire valve holder and a vehicle wheel having a shape enabling an air leakage to be prevented as much as possible. <P>SOLUTION: This tire valve holder 5 is fitted into a valve holder installing hole 21 of a vehicle wheel comprising a wheel disk 2, a rim 4 having an annular wall 41 arranged at an outer circumference of the wheel disk 2, the valve holder installing hole 21 formed at the axial center of the wheel disk 2 into a shape having its diameter near its axial central portion different from diameters at both axial sides, and a communication passage 22 communicating between the valve holder installing hole 21 and the annular wall 41. A tire valve 6 is internally set at a substantial axis, the outer circumferential wall has a communication hole 52a communicating from the outer circumference of the part near the axial central part (an intermediate diameter part 52) with the tire valve 6, the diameter of the portion near the central part (the intermediate diameter part 52) is formed in a stepwise manner different from the diameters at both axial sides (a large diameter part 51 and a small diameter part 53), and its shape corresponds to a shape of the valve holder installing hole 21. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tire valve holder attached to an axis of a wheel disc and a vehicle wheel to which the tire valve holder is attached.

The vehicle wheel is composed of a wheel disc attached to a hub and a rim to which a tire is attached. The rim has an annular wall that forms an air chamber together with the tubeless tire, and a valve mounting hole that penetrates the annular wall and is used for mounting a tire valve. The tire valve has a tip mounted obliquely inward.
In recent years, automobiles have been equipped with an air pressure sensor that detects a decrease in tire air pressure during driving. However, in the case of attaching an air pressure sensor to a wheel, the air pressure sensor integrated with the tire valve is attached to the valve. Generally, there are ones that are mounted in holes (for example, see Patent Document 1) and those that mount a pneumatic sensor separate from a tire valve on an annular wall of a rim (for example, see Patent Document 2).

However, the wheel described above has the following problems due to the tire valve and the air pressure sensor being mounted on the rim.
For example, in the case of a tire valve, when performing the air filling operation, the tire valve is positioned on the upper side or the side depending on the rotational position of the wheel. It will be difficult to press against.
On the other hand, in the case of the air pressure sensor, since it is mounted inside the tire, it is difficult to attach and detach the air sensor and replace the battery of the air pressure sensor, which takes time. In addition, since the shape of the sensor body of the air pressure sensor is formed in a curved shape so as to follow the annular wall of the rim, if the wheel diameter is different, the shape of the air pressure sensor must be changed, which increases manufacturing costs. Furthermore, since the sensor main body protrudes from the annular wall to the outer peripheral side, it is necessary to perform tire replacement work carefully so that the bead portion of the tire does not damage the sensor main body. Since the air pressure sensor is strongly influenced by the centrifugal force caused by the rotation of the wheel during traveling, it is necessary to strengthen the attachment and improve the strength and durability of the sensor body. Further, in order to maintain the rotational balance during traveling, a balance weight must be attached to the wheel, and the weight must be increased.

Therefore, the applicant of the present application has filed an application for a vehicle wheel having a structure in which a tire valve is attached to the axis of a wheel disk in order to solve the above-mentioned problems in Japanese Patent Application No. 2003-317640 (unpublished).
The vehicle wheel of the application includes a wheel disc attached to a hub of the vehicle and a rim provided on the outer peripheral side of the wheel disc. In the wheel disc, a valve holder mounting hole for attaching a cylindrical tire valve is formed in the axis of the wheel disc, and a hollow communication passage that communicates the annular wall of the rim and the valve holder mounting hole is formed in the wheel disc. Form.
JP 2002-283801 A (paragraphs 0024 to 0025, FIGS. 1 and 2) Japanese Patent Laying-Open No. 2003-200723 (paragraph 0013, FIG. 1)

  By the way, in the vehicle wheel described above, since the valve holder mounting hole communicates with the air chamber via the communication path, if the tire valve holder (or tire valve) does not precisely match the valve holder mounting hole, There is a possibility that the air in the air chamber leaks to the outside from the gap between the opposing surfaces. In particular, in a cylindrical tire valve holder, since the gap between the valve holder mounting hole and the opposed surface of the tire valve holder is linear, an air flow is easily formed between them, and leakage is likely to occur. In order to prevent such air leakage, it may be possible to form a valve holder mounting hole that closely contacts the tire valve holder without gaps, or to form a precise communication hole. In addition, there is a limit in accuracy, and it is difficult to ensure airtightness completely.

  Therefore, an object of the present invention is to provide a tire valve holder and a vehicle wheel having a shape that can solve the above-described problems and prevent air leakage as much as possible.

  In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a wheel disc fastened to a hub of a vehicle and an outer peripheral side of the wheel disc, and a tire is mounted and an air chamber is formed together with the tire. A rim having an annular wall, a valve holder mounting hole formed in the axial center of the wheel disc in a shape in which the diameter in the vicinity of the center in the axial direction is different from the diameters on both sides in the axial direction, and the mounting of the valve holder A tire valve holder that is fitted into the valve holder mounting hole of a vehicle wheel including a hole and a communication passage that communicates with the annular wall, and a tire valve is provided in a substantially axial center of the tire valve holder. A communication hole that communicates with the tire valve from an outer peripheral side in the vicinity of the center in the axial direction, and has a stepped shape in which the diameter of the vicinity of the center is different from the diameters on both sides in the axial direction; Characterized in that it corresponds to the shape of Buhoruda mounting hole.

  According to the first aspect of the present invention, the outer peripheral wall of the tire valve holder is formed in a stepped shape and can be fitted into the valve holder mounting hole of the wheel disc. In the tire valve holder having such a stepped shape, the stepped shape portion comes into contact with the inner wall of the valve holder mounting hole when the tire valve holder is fitted into the valve holder mounting hole, and positioning of the communication hole with respect to the communication path can be easily performed. . In addition, since the stepped shape portion easily comes into contact with the inner wall of the valve holder mounting hole, the gap between the two can be made smaller than when the opposing surfaces of the tire valve holder and the valve holder mounting hole are formed linearly. That is, the outer peripheral wall has a shape that can easily come into contact with the inner wall of the valve holder mounting hole on both sides of the vicinity of the center where the communication hole is formed, and the gap therebetween can be reduced. Furthermore, since both sides of the central vicinity where the communication hole is formed have a stepped shape, even if air leaks from the communication hole, the air flow path is diffracted by the angle of the stepped shape. Inevitably, resistance is generated, so that air is less likely to leak from the vicinity of the center toward both sides thereof. For this reason, air is less likely to leak from the gap between the valve holder mounting hole and the opposing surface of the tire valve holder.

  The invention according to claim 2 is the tire valve holder according to claim 1, characterized in that the central vicinity portion and the both side portions of the outer peripheral wall are respectively continuous with a tapered surface.

  According to the second aspect of the present invention, in addition to the operation of the tire valve holder according to the first aspect, the central portion of the outer peripheral wall and both side portions thereof are continuous with each other at the taper surface, so that they are continuously bent at a right angle. In some cases, the area of contact with the valve holder mounting hole can be increased, and the outer wall of the tire valve holder can easily come into surface contact with the inner wall of the valve holder mounting hole. For this reason, air is less likely to leak from the gap between the valve holder mounting hole and the facing surface of the tire valve holder without increasing the manufacturing accuracy as compared with the case of forming with a right-angle stepped shape.

  The invention according to claim 3 is the tire valve holder according to claim 1 or 2, wherein a sealing material is disposed in the stepped shape portion.

According to the invention according to claim 3, in addition to the action of the tire valve holder according to claim 1 or 2, the seal material is provided in the stepped shape portion of the tire valve holder. Airtightness between the outer wall near the center in the axial direction and the valve holder mounting hole can be ensured. In particular, when the tire valve holder is press-fitted into the valve holder mounting hole, the sealing material is brought into close contact with the inner wall of the valve holder mounting hole with the pressure, so that the sealing performance between the two can be improved.
The “stepped shape portion” refers to a portion where the vicinity of the center of the outer peripheral wall and both side portions thereof are continuous, and corresponds to a “tapered surface” in claim 2.

  According to a fourth aspect of the present invention, there is provided a rim including a wheel disc fastened to a hub of a vehicle, and an annular wall provided on an outer peripheral side of the wheel disc, to which a tire is attached and which forms an air chamber together with the tire. And a valve holder mounting hole formed in the axial center of the wheel disc in a shape in which the diameter in the vicinity of the center in the axial direction is different from the diameter of both side portions in the axial direction, the valve holder mounting hole and the annular wall. A vehicle wheel including a communication path that communicates and a tire valve holder that is fitted into the valve holder mounting hole, wherein the tire valve holder includes a tire valve at a substantially axial center thereof, and an outer peripheral wall includes: A communication hole that communicates with the tire valve from the outer peripheral side in the vicinity of the center in the axial direction is formed in a stepped shape in which the diameter in the vicinity of the center is different from the diameters on both sides in the axial direction. Characterized in that it corresponds to the shape of the bulb holder mounting hole.

  According to the invention which concerns on Claim 4, the outer peripheral wall of a tire valve holder is formed in the step shape, and it has the shape which can be fitted to the valve holder mounting hole of a wheel disc. In the tire valve holder having such a stepped shape, the stepped shape portion comes into contact with the inner wall of the valve holder mounting hole when the tire valve holder is fitted into the valve holder mounting hole, and positioning of the communication hole with respect to the communication path can be easily performed. . In addition, since the stepped shape portion easily comes into contact with the inner wall of the valve holder mounting hole, the gap between the two can be made smaller than when the opposing surfaces of the tire valve holder and the valve holder mounting hole are formed linearly. That is, the outer peripheral wall has a shape that can easily come into contact with the inner wall of the valve holder mounting hole on both sides of the vicinity of the center where the communication hole is formed, and the gap therebetween can be reduced. Furthermore, since both sides of the central vicinity where the communication hole is formed have a stepped shape, even if air leaks from the communication hole, the air flow path is diffracted by the angle of the stepped shape. Inevitably, resistance is generated, so that air is less likely to leak from the vicinity of the center toward both sides thereof. For this reason, air is less likely to leak from the gap between the valve holder mounting hole and the opposing surface of the tire valve holder.

  According to the tire valve holder and the vehicle wheel according to the present invention, in the vehicle wheel equipped with the tire valve holder, the airtightness in the tire can be improved.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a perspective view of a vehicle wheel equipped with a tire valve holder according to the present embodiment, and FIG. 2 is a perspective view showing a state before the tire valve holder is fitted into a wheel disc. 3 is a cross-sectional view taken along line AA of the vehicle wheel shown in FIG. 4 is an enlarged cross-sectional view of a portion B of the vehicle wheel shown in FIG.

  A vehicle wheel 1 shown in FIG. 1 is a die-cast molded article made of an aluminum alloy. A wheel disc 2 attached to a vehicle hub (not shown) and a tire 3 mounted on an outer peripheral side of the wheel disc 2 are attached. And a tire valve holder 5 attached to the axial center of the wheel disc 2 (see FIGS. 2 and 3).

As shown in FIG. 3, a bead portion 31 of the tire 3 is fitted to the rim 4, and an annular wall 41 that forms an air chamber 32 together with the tire 3 is formed on the outer peripheral side of the rim 4.
Further, as shown in FIG. 2, a valve holder mounting hole 21 is formed in the shaft center on the outer surface side of the wheel disk 2. The valve holder mounting hole 21 includes a large diameter portion 211, a medium diameter portion 212, a small diameter portion 213, a tapered surface 214 continuous from the large diameter portion 211 to the medium diameter portion 212, and from the medium diameter portion 212 to the small diameter portion 213. It has a continuous taper surface 215, that is, it is formed so that the diameter of the central vicinity of the axial direction is different from the diameters of both axial sides. Further, an annular groove 21a is formed in the medium diameter portion 212 and communicates with a communication path 22 of the wheel disk 2 described later.

  As shown in FIGS. 2 and 3, a communication path 22 is formed in the wheel disk 2 so as to introduce air and reduce the weight, and the annular wall of the rim 4 is formed. 41 communicates with the valve holder mounting hole 21 on the wheel disc 2 side. By forming the valve holder mounting hole 21 in the axial center of the wheel disk 2, air filling work, air pressure measurement, etc. can be easily performed, the wheel weight balance is stabilized, and the rotation balance is also improved. Can do.

A tire valve holder 5 in which the tire valve 6 is provided is press-fitted into the valve holder mounting hole 21.
The tire valve holder 5 is an injection-molded product made of ABS resin, modified PPE resin, or the like, and includes a cylindrical large-diameter portion 51, a medium-diameter portion 52, and a small-diameter portion 53 as shown in FIG. In other words, the outer peripheral wall is formed so as to have a stepped shape in which the diameter in the vicinity of the center in the axial direction and the diameters on both sides in the axial direction are different, and corresponds to the shape of the valve holder mounting hole 21. It has a shape to do. The tire valve holder 5 is press-fitted into the valve holder mounting hole 21 from the outside of the vehicle so that the large diameter portion 51 is disposed outside the vehicle and the small diameter portion 53 is disposed inside the vehicle. A tapered seal surface 54 is formed from the large diameter portion 51 to the medium diameter portion 52, and a tapered seal surface 55 is similarly formed from the medium diameter portion 52 to the small diameter portion 53. A seal material S is disposed on the seal surfaces 54 and 55 to substantially seal between the tire valve holder 5 and the wheel disc 2. As the sealing material S, for example, a metal seal, a resin seal such as silicone rubber or silicone grease, an oil seal, a gasket material made of paper, or the like can be applied.

  A tire valve 6 is provided in the shaft center of the tire valve holder 5, and a communication hole 52 a is formed from the outer peripheral wall of the medium diameter portion 52 toward the shaft center so as to communicate with the tire valve 6. ing. When the tire valve holder 5 is fitted into the wheel disc 2, the communication hole 52a communicates with the communication path 22 via the annular groove 21a. In the present embodiment, by adopting such a configuration, communication between the communication path 22 and the communication hole 52a is ensured without performing angle adjustment when the tire valve holder 5 is press-fitted into the valve holder mounting hole 21. The Although a plurality of communication holes 52a may be provided, since an annular groove is provided, communication with the communication path 22 is ensured if there is at least one communication hole 52a.

As shown in FIG. 4, the tire valve 6 includes a cylinder-shaped valve body 61 and a piston-shaped valve core 62 inserted in the axial direction of the valve body 61, and the valve body 61 includes a synthetic resin valve. A cover 63 is attached, and the tire valve 6 is covered by the valve cover 63.
The valve core 62 in the valve body 61 is urged toward the air filling port 61a by an elastic member such as a spring and normally shuts off the air passage in the valve body 61. However, the valve core 62 resists the urging force of the spring. By pressing 62, the air chamber 32 (see FIG. 3) can be filled with air.

According to the above, in the vehicle wheel 1 according to the present embodiment, the following operational effects can be obtained.
In the vehicle wheel 1 to which the tire valve holder 5 is mounted, air is filled from the tire valve 6 into the communication hole 52a, the communication path 22, and the air chamber 32 (see FIG. 3).
The tire valve holder 5 is formed with tapered sealing surfaces 54 and 55, so that the sealing surfaces 54 and 55 abut against the tapered surfaces 214 and 215 which are the inner walls of the valve holder mounting hole 21, and The communication hole 52a can be easily positioned. Further, since the seal surfaces 54 and 55 are easily brought into contact with the tapered surfaces 214 and 215 of the valve holder mounting hole 21, both sides of the medium diameter portion 52 where the communication hole 52a is formed are sealed, and the valve holder mounting hole 21 and the tire are sealed. Air can be made difficult to leak from the gap between the valve holder 5 and the valve holder 5. Further, since both sides of the medium diameter portion 52 where the communication hole 52a is formed have a stepped shape, even if air leaks from the communication hole 52a, the air flow path has an angle corresponding to the stepped shape. Therefore, it is difficult to leak air from the medium diameter portion 52 side toward the large diameter portion 51 and the small diameter portion 53 side.
Further, since the sealing surfaces 54 and 55 are formed in a tapered shape, a large sealing area can be secured, and the sealing performance can be improved.

Furthermore, since the tire valve holder 5 is press-fitted into the valve holder mounting hole 21, the seal surfaces 54 and 55 are brought into close contact with the tapered surfaces 214 and 215 of the valve holder mounting hole 21 under the pressure, and the wheel disc 2 And the tire valve holder 5 can be improved in sealing performance.
In the above-described embodiment, the sealing surfaces 54 and 55 are formed in a tapered shape. For example, as shown in FIG. 5, from the large diameter portion 51 to the medium diameter portion 52 and from the medium diameter portion 52 to the small diameter portion 53. It is good also as the sealing surfaces 56 and 57 which continue at right angles.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. For example, in the present embodiment, the tire valve holder 5 is press-fitted into the wheel disc 2, but may be a screw-in type or a bolt-in type.

In the present embodiment, the tire valve holder is provided with a tire valve. However, the tire valve holder may be provided with a pneumatic sensor integrated type or a separate type tire valve. By installing an air pressure sensor-integrated tire valve or attaching the air pressure sensor to the tire valve 6 according to the present embodiment, the bead portion collides with the air pressure sensor when the tire 3 is attached or detached as in the past. Therefore, it is not necessary to pay unnecessary attention to the replacement work of the tire 3 or the like. Further, since the air pressure sensor is located at the center of rotation, the rotation balance can be improved, the centrifugal force and the impact force acting on the air pressure sensor can be suppressed, and damage to the air pressure sensor can also be suppressed.
In this embodiment, the sealing material is arranged on the sealing surfaces 54 and 55, but it may be arranged on the outer peripheral surface of the large diameter part 51 or the small diameter part 53.
In the present embodiment, the tire valve holder 5 is press-fitted into the valve holder mounting hole 21 from the outside of the vehicle. However, the positions of the large-diameter portion 51 and the small-diameter portion 53 may be reversed and press-fitted from the inside of the vehicle.

It is a perspective view of the wheel for vehicles concerning this embodiment. It is a perspective view which shows the state before inserting a tire valve holder in a wheel disc. It is AA sectional view taken on the line of the vehicle wheel shown in FIG. FIG. 4 is an enlarged cross-sectional view of a portion B of the vehicle wheel shown in FIG. 3. It is a principal part expanded sectional view of the wheel for vehicles concerning other embodiments.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle wheel 2 Wheel disk 3 Tire 4 Rim 5 Tire valve holder 6 Tire valve 21 Valve holder mounting hole 22 Communication path 31 Bead part 32 Air chamber 41 Annular wall 51 Large diameter part 52 Medium diameter part 52a Communication hole 53 Small diameter part 54 , 55 Seal surface 61 Valve body 62 Valve core S Seal material

Claims (4)

A wheel disc fastened to a hub of a vehicle, a rim provided on an outer peripheral side of the wheel disc, to which a tire is mounted, and an annular wall that forms an air chamber together with the tire, and an axis of the wheel disc And a valve holder mounting hole formed in a shape in which the diameter in the vicinity of the central portion in the axial direction is different from the diameters of both side portions in the axial direction, and a communication passage that communicates the valve holder mounting hole and the annular wall. A tire valve holder that is fitted into the valve holder mounting hole of the wheel,
The tire valve holder is
A tire valve is installed in the approximate axis,
The outer peripheral wall has a communication hole that communicates with the tire valve from the outer peripheral side of the axial vicinity of the central portion thereof, and is formed in a stepped shape in which the diameter of the central peripheral portion is different from the diameters of both axial side portions, A tire valve holder corresponding to the shape of the valve holder mounting hole.   2. The tire valve holder according to claim 1, wherein the vicinity of the center and the both side portions of the outer peripheral wall are each continuous with a tapered surface.   The tire valve holder according to claim 1, wherein a sealing material is disposed on the stepped shape portion. A wheel disc fastened to the hub of the vehicle;
A rim provided on the outer peripheral side of the wheel disc, with a tire mounted thereon, and an annular wall that forms an air chamber with the tire; and
A valve holder mounting hole formed in the axial center of the wheel disc in a shape in which the diameter in the vicinity of the center in the axial direction is different from the diameters on both sides in the axial direction;
A communication path communicating the valve holder mounting hole and the annular wall;
A vehicle wheel comprising a tire valve holder fitted into the valve holder mounting hole,
The tire valve holder is
A tire valve is installed in the approximate axis,
The outer peripheral wall has a communication hole that communicates with the tire valve from the outer peripheral side of the axial vicinity of the central portion thereof, and is formed in a stepped shape in which the diameter of the central peripheral portion is different from the diameters of both axial side portions, A vehicle wheel corresponding to the shape of the valve holder mounting hole.

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