WO2017138358A1

WO2017138358A1 - Automobile wheel

Info

Publication number: WO2017138358A1
Application number: PCT/JP2017/002649
Authority: WO
Inventors: 真実寺口
Original assignee: 中央精機株式会社
Priority date: 2016-02-08
Filing date: 2017-01-26
Publication date: 2017-08-17
Also published as: JP6579581B2; JP2017140855A

Abstract

A resin auxiliary air chamber member 30 is fixed, by a metal fixing member 40, between a pair of wall surfaces 13 provided in a well section 12 of a wheel rim. A groove 15 is provided in each wall surface 13. The fixing member 40 comprises a floor surface section 41 and a pair of side surface sections 42. The fixing member 40 is attached to the auxiliary air chamber member 30 and the auxiliary air chamber member 30 having the fixing member 40 attached thereto is inserted between the pair of wall surfaces 13. A first hook section 45 is provided on the outside surface of each side surface section 42, said first hook section abutting the groove 15 and restricting travel by the fixing member 40 relative to the wall surface 13, towards the outside in the wheel radial direction. A second hook section 46 is provided on the inside surface of each side surface section 42, said second hook section abutting part of the auxiliary air chamber member 30 and restricting travel by the auxiliary air chamber member 30 relative to the fixing member 40, towards the outside in the wheel radial direction. As a result an automobile wheel can be provided whereby the auxiliary air chamber member can be easily attached to the well section.

Description

Automotive wheel

The present invention relates to an automobile wheel.

Recently, when designing an automobile wheel, there has been a demand for a technique for reducing in-vehicle noise by reducing road noise generated during vehicle travel. Therefore, various proposals have been made for techniques for reducing vehicle interior noise during vehicle travel by providing a sub air chamber member as a sound absorber that absorbs the cavity resonance generated in the tire main air chamber during vehicle travel. Has been.

This auxiliary air chamber member is a member having therein a tire auxiliary air chamber communicating with the tire main air chamber. Usually, the auxiliary air chamber member is fixed to a so-called well portion of the wheel rim. At that time, it is important how the auxiliary air chamber member is fixed to the well portion.

For example, in an automobile wheel described in Japanese Patent Application Laid-Open No. 2010-52700, a resin auxiliary air chamber member that extends while being curved along the circumferential direction of the wheel uses a metal fixing member, and a wheel rim. It is fixed to the well part. Specifically, the sub air chamber member has a main body portion having a tire sub air chamber and an edge portion extending from the main body portion. The well portion is formed with a pair of wall surfaces extending in the circumferential direction of the wheel and opposed in the wheel axial direction. When fixing the auxiliary air chamber member to the well portion, first, the auxiliary air chamber member is attached between the pair of wall surfaces of the well portion. Next, the fixing member is locked to the pair of wall surfaces of the well portion so that the fixing member presses the edge of the auxiliary air chamber member toward the inner side in the wheel radial direction. Thereby, the auxiliary air chamber member is fixed to the well portion.

In the above document, as described above, after the auxiliary air chamber member is attached to the well portion, the fixing member is attached to the well portion. In other words, there are two steps as a step of attaching a certain member to the well portion. For this reason, it is not always easy to attach the auxiliary air chamber member to the well portion. There is a demand for further facilitating the work of attaching the auxiliary air chamber member to the well portion.

The present invention has been made to cope with the above-described problems, and an object of the present invention is to provide an automobile wheel in which an operation for attaching a sub air chamber member to a well portion is easy.

The vehicle wheel according to the present invention has a wheel diameter between a bead seat on the vehicle outer side and a bead seat on the vehicle inner side that holds a bead of the tire on a rim outer peripheral surface that partitions a tire main air chamber between the tire and the tire. A wheel rim having a well portion that is recessed inward in the direction and extending in the circumferential direction of the wheel, and a tire-side air chamber that extends while curving along the circumferential direction of the wheel and communicates with the tire main air chamber. A secondary air chamber member; and a fixing member that fixes the secondary air chamber member to the well portion. The fixing member is preferably made of metal, but may be made of resin, for example.

The automotive wheel according to the present invention is characterized in that the well portion has a pair of wall surfaces extending in the circumferential direction of the wheel and facing the wheel axial direction, and a first locking portion is provided on each of the pair of wall surfaces. The fixing member includes a bottom surface portion and a pair of side surface portions rising from the bottom surface portion, and the fixing member is configured such that the bottom surface portion faces the inner surface in the wheel radial direction of the auxiliary air chamber member and The sub-air chamber member is attached to the sub-air chamber member so that a pair of side surface portions opposes both side surfaces of the sub-air chamber member, and the sub-air chamber member to which the fixing member is attached has the bottom surface portion of the well portion. The first locking portion is disposed between the pair of wall surfaces so as to face the bottom surface and the pair of side surface portions faces the pair of wall surfaces, The pair of fixing members A second locking portion that restricts movement of the wall surface in the radial direction of the wheel is provided, and the inner surface of each of the pair of side surfaces is in contact with a part of the auxiliary air chamber member, thereby A third locking portion for restricting movement of the chamber member to the outer side in the wheel radial direction with respect to the fixed member is provided.

According to this, in the state where the fixing member is attached to the auxiliary air chamber member, the movement of the auxiliary air chamber member toward the inner side in the wheel radial direction with respect to the fixing member is restricted by the bottom surface portion of the fixing member itself, and the auxiliary air chamber member Movement of the fixing member toward the outer side in the wheel radial direction is restricted by a third locking portion provided on the fixing member. Therefore, in a state where the fixing member is attached to the sub air chamber member, the fixing member does not fall off from the sub air chamber member. In other words, the auxiliary air chamber member and the fixing member are sub-assembled. When this subassembly is inserted between a pair of wall surfaces provided in the well portion, the first locking portion provided on the pair of wall surfaces and the second locking portion provided on the fixing member come into contact with each other. By this, this sub-assembly (and hence the sub-air chamber member) can be fixed to the well portion.

Thus, according to the vehicle wheel according to the present invention, the sub air chamber member is fixed to the well portion only by attaching the sub assembly composed of the sub air chamber member and the fixing member to the well portion (with one touch). In other words, there is only one process of attaching any member to the well portion. For this reason, the operation | work which attaches a sub air chamber member to a well part becomes easy compared with the wheel for motor vehicles described in the literature mentioned above.

In the vehicle wheel according to the present invention, the first elastic portion that generates an elastic force that presses the inner surface in the wheel radial direction of the auxiliary air chamber member toward the outer side in the wheel radial direction is provided on the bottom surface portion of the fixing member. It is preferable to be provided.

According to this, in a state where the fixing member is attached to the auxiliary air chamber member, a state in which a part of the auxiliary air chamber member is in contact with the third locking portion of the fixing member due to the elastic force of the first elastic portion. Can be maintained. Accordingly, it is possible to suppress the generation of noise due to a part of the auxiliary air chamber member colliding with the third locking portion of the fixed member during traveling of the vehicle.

In the automotive wheel according to the present invention, it is preferable that the bottom surface portion of the fixing member is provided with a second elastic portion that generates an elastic force that presses the bottom surface of the well portion toward the inner side in the wheel radial direction. is there.

According to this, the fixing member is pressed toward the outer side in the wheel radial direction by the reaction force of the elastic force of the second elastic portion. Therefore, in a state where the sub-assembly is disposed between the pair of wall surfaces of the well portion, the second locking portion of the fixing member becomes the first locking portion of the pair of wall surfaces by the reaction force of the elastic force of the second elastic portion. It is possible to maintain a state in contact with. Therefore, during traveling of the vehicle or the like, it is possible to suppress the generation of noise due to the second locking portion of the fixing member colliding with the first locking portions of the pair of wall surfaces.

In the automobile wheel according to the present invention, it is preferable that the fixing member is integrally formed of a metal plate-like member. Here, the bottom surface portion is a flat plate-like portion, and the first elastic portion is a plate-like portion that extends integrally from the bottom surface portion and is located on the outer side in the wheel radial direction with respect to the plane of the bottom surface portion. It is preferable. Moreover, it is preferable that the second elastic portion is a plate-like portion that extends integrally from the bottom surface portion and is located on the inner side in the wheel radial direction with respect to the plane of the bottom surface portion.

According to this, since the fixing member is integrally formed of a metal plate-like member, the fixing member can be made thin, and the size of the auxiliary air chamber member (therefore, the volume of the tire auxiliary air chamber can be reduced under the restriction of the mounting space. ) Can be increased. In addition, since the elastic force is less likely to decrease due to temperature change, secular change, and the like, compared to the case where the fixing member is made of resin, it is possible to exhibit a stable elastic force over a long period of time. Furthermore, compared to the case where the fixing member is made of resin, the manufacturing of the fixing member itself is facilitated, and the manufacturing cost of the fixing member can be reduced.

In the automobile wheel according to the present invention, the first locking portion is a groove portion extending in the circumferential direction of the wheel, and the pair of side surface portions are bent from the flat bottom surface portion and rise up. The second locking portion is a flat plate-like first claw portion that is inclined and integrally extended from the side surface portion toward the wheel axial direction outer side and the wheel radial direction outer side, and the groove portion includes the first claw portion. It is preferable that movement of the fixing member to the outer side in the wheel radial direction with respect to the pair of wall surfaces is restricted by fitting a tip of one claw portion.

According to this, since the 2nd latching | locking part is comprised by the flat 1st nail | claw part which inclines toward the wheel axial direction outer side and a wheel radial direction outer side from a side part, with comparatively small force, The subassembly can be inserted between a pair of wall surfaces of the well portion. In addition, after the subassembly is inserted between the pair of wall surfaces, the tip of the first claw portion fits into a groove provided in the pair of wall surfaces, so that the subassembly (and thus the sub air chamber member) is It can be firmly fixed to the well portion.

In the vehicle wheel according to the present invention, the pair of side surface portions are a pair of flat plate-like portions that bend and rise from the flat bottom surface portion, and the third locking portion is the wheel of the side surface portion. It is a flat plate-like second claw portion that integrally extends from the radially outer front end portion toward the wheel axis direction inner side, and the wheel radial direction outer surface of the auxiliary air chamber member abuts on the second claw portion. It is preferable that movement of the auxiliary air chamber member to the outer side in the wheel radial direction with respect to the fixed member is restricted.

According to this, when the auxiliary air chamber member tries to move outward in the wheel radial direction with respect to the fixed member by the centrifugal force acting on the auxiliary air chamber member during traveling of the vehicle or the like, it comes into contact with a part of the auxiliary air chamber member. The pair of side surfaces of the fixing member tends to be deformed outward in the wheel axis direction by the force received by the second claw portion. However, the deformation of the pair of side surface portions is restricted by the pair of wall surfaces themselves facing the pair of side surface portions. For this reason, it is difficult to disengage the second claw portion and the auxiliary air chamber member.

In the vehicle wheel according to the present invention, it is preferable that a concave portion into which the bottom surface portion and the pair of side surface portions fit is formed in a portion where the fixing member is mounted on the surface of the auxiliary air chamber member. . According to this, since the movement of the fixing member in the circumferential direction of the wheel with respect to the sub air chamber member is restricted in the state of the sub assembly, the fixing member and the sub air chamber member are more It can be integrated more firmly.

In the automobile wheel according to the present invention, a part of the pair of wall surfaces is provided with a notch that opens outward in the radial direction of the wheel, and the portion on the surface of the auxiliary air chamber member where the fixing member is not mounted. It is preferable that a protrusion that protrudes outward in the wheel axis direction and that fits into the notch portion is provided. Accordingly, the movement of the auxiliary air chamber member in the wheel circumferential direction relative to the wheel rim can be reliably restricted.

FIG. 1 is a perspective view showing the entirety of an embodiment of an automobile wheel according to the present invention. FIG. 2 is a schematic view of the embodiment shown in FIG. 1 viewed from the outside of the vehicle. FIG. 3 is a perspective view of the entire auxiliary air chamber member shown in FIG. FIG. 4 is a schematic view of the auxiliary air chamber member when the auxiliary air chamber member shown in FIG. 1 constitutes a side branch pipe. FIG. 5 is a schematic view of the auxiliary air chamber member when the auxiliary air chamber member shown in FIG. 1 constitutes a Helmholtz resonator. FIG. 6 is a schematic view of the fixing member shown in FIG. 1 viewed from the wheel circumferential direction. FIG. 7 is a view showing an example of a metal flat plate used when the fixing member shown in FIG. 6 is formed. FIG. 8 is a view corresponding to FIG. 6 illustrating a state when the fixing member is attached to the auxiliary air chamber member. FIG. 9 is a view corresponding to FIG. 6 showing a state when the sub-assembly composed of the auxiliary air chamber member and the fixing member is inserted between the pair of wall surfaces. FIG. 10 is a diagram for explaining the operation and effect of the embodiment shown in FIG. FIG. 11 is a diagram corresponding to FIG. 9 according to a modification of the embodiment shown in FIG. FIG. 12 is a view corresponding to FIG. 9 according to another modification of the embodiment shown in FIG. FIG. 13 is a view showing an example of a metal flat plate used when the fixing member according to the modification shown in FIG. 12 is formed. FIG. 14 is a diagram corresponding to FIG. 9 according to another modification of the embodiment shown in FIG. FIG. 15 is a view showing an example of a metal flat plate used when the fixing member according to the modification shown in FIG. 14 is formed. FIG. 16 is a diagram corresponding to FIG. 6 according to another modification of the embodiment shown in FIG. FIG. 17 is a diagram corresponding to FIG. 7 according to the modification shown in FIG. 18 is a diagram corresponding to FIG. 8 according to the modification shown in FIG. FIG. 19 is a diagram corresponding to FIG. 9 according to the modification shown in FIG. FIG. 20 is a diagram for explaining the operation and effect of the modification shown in FIG. FIG. 21 is a diagram corresponding to FIG. 19 of another example of the modification shown in FIG.

Hereinafter, an embodiment of an automobile wheel according to the present invention (hereinafter referred to as “this embodiment”) will be described with reference to the drawings.

(Wheel structure)
As shown in FIGS. 1 and 2, the present embodiment includes a cylindrical wheel rim (hereinafter simply referred to as “rim”) 10 to which an annular tire T (see FIG. 2) is attached, A disc-shaped wheel disc 20 joined to a cylinder end on the vehicle outer side. The rim 10 and the wheel disc 20 are made of, for example, an aluminum alloy, and are manufactured by casting or the like.

The outer peripheral surface of the rim 10 defines a tire main air chamber TS (see FIG. 2) between the tire T and the tire T. A well portion 12 is formed on the outer peripheral surface of the rim 10 between a pair of bead seats 11 on the vehicle outer side and the vehicle inner side that hold the bead of the tire. The well portion 12 is a groove portion that is recessed inward in the wheel radial direction and that extends annularly along the circumferential direction of the wheel.

The well portion 12 is formed with a pair of wall surfaces 13 extending in the circumferential direction of the wheel and facing the wheel axial direction. In the example shown in FIG. 1, one of the pair of wall surfaces 13 (the left wall surface 13 in FIG. 1) is a vertical wall that protrudes outward in the wheel radial direction from the bottom surface of the well portion 12 and extends annularly along the wheel circumferential direction. The other side of the pair of wall surfaces 13 (the right wall surface 13 in FIG. 1) is composed of the side surface of the well portion 12 itself. Both the pair of wall surfaces 13 may be configured by a pair of side surfaces of the vertical wall facing the wheel axis direction, or may be configured by a pair of side surfaces of the well portion 12 facing the wheel axis direction. .

As shown in FIGS. 1 and 2, a sub air chamber member 30 is provided between the pair of wall surfaces 13 of the well portion 12. The auxiliary air chamber member 30 is a resin tubular member that extends while curving along the circumferential direction of the wheel, and a tire auxiliary air chamber 35 that communicates with the tire main air chamber TS (see FIGS. 4 and 5 to be described later). For example). The cross-sectional shape orthogonal to the wheel circumferential direction of the auxiliary air chamber member 30 is typically a quadrangle, but may be a circle, an ellipse, or the like, and this shape may be a shape of the well portion 12 or a tire. A shape deformed in consideration of the assembling property of T to the rim 10 may be used. The auxiliary air chamber member 30 is preferably made of polypropylene that is lightweight and excellent in strength. The auxiliary air chamber member 30 is formed by, for example, blow molding.

The auxiliary air chamber member 30 is fixed to the well portion 12 by a metal fixing member 40. A structure for fixing the auxiliary air chamber member 30 to the well portion 12 using the fixing member 40 will be described in detail later. In the example shown in FIGS. 1 and 2, three auxiliary air chamber members 30 are arranged on the rim 10 at approximately equal intervals in the wheel circumferential direction, and each auxiliary air chamber member 30 has both ends in the wheel circumferential direction. It is fixed to the well portion 12 by two fixing members 40 mounted in the vicinity of the portion. The number of auxiliary air chamber members 30 provided on the rim 10 may be one, or a plurality other than three. The number of fixing members 40 attached to each sub air chamber member 30 may be one, or may be three or more.

As shown in FIG. 3, a portion of the surface of the auxiliary air chamber member 30 where the fixing member 40 is mounted (near both ends in the circumferential direction of the wheel) is a corresponding portion of the fixing member 40 (specifically, a bottom surface described later). Recesses 31 into which the portion 41 and the pair of side surface portions 42) are fitted are respectively formed. Thereby, the movement of the fixing member 40 in the wheel circumferential direction with respect to the auxiliary air chamber member 30 is reliably restricted.

Further, as shown in FIG. 3, the portion (the central portion in the wheel circumferential direction in the example shown in FIGS. 1 and 3) where the fixing member 40 is not mounted on the surface of the auxiliary air chamber member 30 is disposed outside the wheel axial direction. A protruding protrusion 32 is provided. As shown in FIG. 1, the protrusion 32 is fitted in a notch portion 14 provided on a part of the pair of wall surfaces 13 and opening outward in the wheel radial direction. As a result, the movement of the auxiliary air chamber member 30 in the circumferential direction of the wheel with respect to the rim 10 is reliably restricted.

As shown in FIG. 4, as the auxiliary air chamber member 30, an aspect in which one end portion of both ends in the circumferential direction of the wheel is closed by the end wall 33 and the other end portion is opened can be employed. In this case, the tire auxiliary air chamber 35 communicates with the tire main air chamber TS through the opening 36. In this case, the auxiliary air chamber member 30 constitutes a so-called “side branch pipe” as a sound absorber that absorbs the tire cavity resonance generated in the tire main air chamber TS due to road surface input during vehicle travel. The length of the tire auxiliary air chamber 35 in the circumferential direction of the wheel is set to a length approximate to a reference length corresponding to a quarter of the cavity resonance wavelength in the tire main air chamber TS. Thereby, the sound wave in the tire main air chamber TS and the sound wave that is introduced into the tire sub air chamber 35 through the opening 36 and collides with the end wall 33 and then returns to the tire main air chamber TS again through the opening 36 are in opposite phases. It is synthesized and acts to cancel the sound. As a result, vibration at a specific frequency (typically, a frequency in the vicinity of 200 to 250 Hz) in the tire main chamber TS can be absorbed, and vehicle interior noise during vehicle travel can be reduced.

Alternatively, as shown in FIG. 5, the auxiliary air chamber member 30 has a form in which both end portions in the circumferential direction of the wheel are closed by the end walls 33 and communication holes 34 penetrating a part thereof are formed. Can be employed. In this case, the tire auxiliary air chamber 35 communicates with the tire main air chamber TS through the communication hole 34. In this case, the auxiliary air chamber member 30 constitutes a so-called “Helmholtz resonator” as the sound absorber. By appropriately adjusting the volume of the tire auxiliary air chamber 35 and the hole diameter and hole length of the communication hole 34, the vibration of a specific frequency (typically, a frequency around 200 to 250 Hz) in the tire main air chamber TS is absorbed. In-vehicle noise during vehicle travel can be reduced.

(Fixing structure of the auxiliary air chamber member to the well using a fixing member)
Next, a structure for fixing the auxiliary air chamber member 30 to the well portion 12 using the fixing member 40 will be described with reference to FIGS.

First, the configuration of the metal fixing member 40 will be described with reference to FIGS. 6 and 7. FIG. 6 shows the fixing member 40 when viewed from the circumferential direction of the wheel. The fixing member 40 shown in FIG. 6 is formed, for example, by bending a portion indicated by a one-dot chain line in the drawing on the metal flat plate shown in FIG. 7 by press molding or the like. Therefore, the whole fixing member 40 constitutes an elastic body. The fixing member 40 is preferably made of stainless steel (typically SUS304) excellent in corrosion resistance. Note that the fixing member 40 may be formed by a known method other than press molding.

Hereinafter, for convenience of explanation, the upward direction and the downward direction in FIG. 6 (the wheel radial direction outer side and the inner side after assembly to the wheel) are referred to as “upward direction” and “downward direction”, respectively. The wheel axis direction) is referred to as the “width direction” and the direction perpendicular to the paper surface in FIG. 6 (the wheel circumferential direction after the wheel assembly) is referred to as the “depth direction”.

As shown in FIG. 6, the fixing member 40 includes a flat bottom portion 41 and a pair of opposing flat side portions 42 that are bent from both end portions of the bottom portion 41 and rise upward.

The bottom surface portion 41 is provided with a first elastic portion 43 and a second elastic portion 44. As can be understood from FIGS. 6 and 7, the first elastic portion 43 is a doubly-supported plate-like portion extending in the width direction while curving in an arc shape protruding upward from both widthwise end portions of the bottom surface portion 41. is there. In other words, the first elastic portion 43 is a plate-like portion that extends integrally from the bottom surface portion 41 and is located on the outer side in the wheel radial direction with respect to the plane (virtual plane) of the bottom surface portion 41.

As will be described later, the first elastic portion 43 has the lower surface (the inner surface in the wheel radial direction) of the auxiliary air chamber member 30 on the upper side (the outer side in the wheel radial direction) when the fixing member 40 is attached to the auxiliary air chamber member 30. It has a function of generating an elastic force F1 that presses toward it. In the example shown in FIG.6 and FIG.7, although the 1st elastic part 43 is provided in two places regarding the depth direction, it may be provided only in one place regarding the depth direction, and three or more places regarding the depth direction. May be provided.

As can be understood from FIGS. 6 and 7, the second elastic portion 44 is a plate-like portion of a doubly supported beam shape extending in the width direction while curving in an arc shape protruding downward from both width direction end portions of the bottom surface portion 41. is there. In other words, the second elastic portion 44 is a plate-like portion that extends integrally from the bottom surface portion 41 and is located on the inner side in the wheel radial direction with respect to the plane (virtual plane) of the bottom surface portion 41.

As will be described later, the second elastic portion 44 has a bottom surface of the well portion 12 in a state where the auxiliary air chamber member 30 (subassembly) to which the fixing member 40 is attached is inserted between the pair of wall surfaces 13 of the well portion 12. Has a function of generating an elastic force F 2 that presses toward the lower side (inner side in the wheel radial direction). In the example shown in FIG.6 and FIG.7, although the 2nd elastic part 44 is provided in two places regarding the depth direction, you may be provided only in one place regarding the depth direction, or three or more places regarding the depth direction. May be provided.

A first claw portion 45 is provided on each outer side surface of the pair of side surface portions 42. As can be understood from FIGS. 6 and 7, each of the first claw portions 45 is a cantilever-like flat plate-like portion extending integrally from the corresponding side surface portion 42 in an upward direction and in the width direction. . As will be described later, the first claw portion 45 is provided on the wall surface 13 in a state where the auxiliary air chamber member 30 (subassembly) to which the fixing member 40 is attached is inserted between the pair of wall surfaces 13 of the well portion 12. It has a function of fitting into the groove 15. In the example shown in FIG.6 and FIG.7, although the 1st nail | claw part 45 is provided in two places regarding the depth direction, it may be provided only in one place regarding the depth direction, or three or more places regarding the depth direction. May be provided. The 1st nail | claw part 45 respond | corresponds to the "2nd latching | locking part" of this invention.

A second claw portion 46 is provided on each inner side surface of the pair of side surface portions 42. As can be understood from FIGS. 6 and 7, each of the second claw portions 46 is a cantilever plate-like portion that integrally extends from the upper end portion of the corresponding side surface portion 42 toward the inside in the width direction. As will be described later, the second claw portion 46 has a function of coming into contact with the end portion in the width direction of the upper surface of the sub air chamber member 30 in a state where the fixing member 40 is attached to the sub air chamber member 30. In the example shown in FIGS. 6 and 7, the second claw portion 46 is continuously provided over the entire region in the depth direction, but may be provided separately at a plurality of locations in the depth direction. The 2nd nail | claw part 46 respond | corresponds to the "3rd latching | locking part" of this invention.

Hereinafter, the procedure for mounting the fixing member 40 to the auxiliary air chamber member 30 will be described with reference to FIG. In this example, the cross-sectional shape orthogonal to the wheel circumferential direction of the auxiliary air chamber member 30 is a quadrangle.

As shown in FIG. 8A, first, a force in the width direction outside is applied to the pair of side surface portions 42, and the distance in the width direction between the ends of the pair of second claw portions 46 is determined as the auxiliary air chamber member 30. In a state where the pair of side surface portions 42 are elastically deformed outward in the width direction so as to be larger than the dimension in the width direction, as shown by a thick arrow, the auxiliary air chamber member 30 is accommodated inside the fixing member 40, The bottom surface portion 41 is brought closer to the lower surface of the auxiliary air chamber member 30.

As shown in FIG. 8B, even after the lower surface of the auxiliary air chamber member 30 comes into contact with the first elastic portion 43 of the bottom surface portion 41, the first elasticity against the elastic force F 1 of the first elastic portion 43 is obtained. The bottom surface portion 41 is further pressed against the lower surface of the auxiliary air chamber member 30 while elastically deforming the portion 43 until it becomes substantially flat. By elastically deforming the first elastic portion 43 in this way, a gap a (> 0) is secured between the second claw portion 46 and the upper surface of the auxiliary air chamber member 30. In this state, the position of the pair of side surfaces 42 is returned to the original position by finishing the application of the force on the outer side in the width direction. Thereby, the space | interval of the width direction of a pair of 2nd nail | claw part 46 becomes smaller than the dimension of the width direction of the sub air chamber member 30. FIG. As described above, the dimensional relationship in which the gap a can be ensured enables the positions of the pair of side surface portions 42 to be reliably returned to the original positions.

And as shown in FIG.8 (c), the press to the lower surface of the sub-air chamber member 30 of the bottom face part 41 is complete | finished. Thereby, the auxiliary air chamber member 30 is pressed upward by the elastic force F 1 of the first elastic portion 43. As a result, the auxiliary air chamber member 30 moves upward relative to the fixing member 40, and both end portions in the width direction of the upper surface of the auxiliary air chamber member 30 are in contact with (pressed against) the pair of second claw portions 46. The state is maintained.

In this way, the mounting of the fixing member 40 to the auxiliary air chamber member 30 is completed. In a state where the fixing member 40 is attached to the sub air chamber member 30, the downward movement of the sub air chamber member 30 relative to the fixing member 40 is restricted by the bottom surface portion 41 of the fixing member 40 itself. The upward movement of the fixing member 40 is restricted by the second claw portion 46 of the fixing member 40. Therefore, in a state where the fixing member 40 is attached to the sub air chamber member 30, the fixing member 40 does not fall off from the sub air chamber member 30. In other words, the auxiliary air chamber member 30 and the fixing member 40 are sub-assembled.

Next, the procedure for attaching this subassembly to the well portion 12 of the rim 10 will be described with reference to FIG. As shown in FIG. 9, in this example, a groove portion 15 is provided in each of a pair of wall surfaces 13 provided in the well portion 12 of the rim 10. The groove 15 corresponds to the “first locking portion” of the present invention.

As shown in FIG. 9A, the subassembly is inserted between the pair of wall surfaces 13 of the rim 10 as indicated by the thick arrows, and the bottom surface portion 41 is brought closer to the bottom surface 12a of the well portion 12. As shown in FIG. 9 (b), after the tip of the first claw portion 45 comes into contact with the wall surface 13, the first claw portion 45 is pressed by the wall surface 13 and elastically deformed inward in the width direction. 41 is further brought closer to the bottom surface 12 a of the well portion 12.

As shown in FIG. 9C, even after the bottom surface 12 a of the well portion 12 comes into contact with the second elastic portion 44 of the bottom surface portion 41, the second elastic portion is opposed to the elastic force F 2 of the second elastic portion 44. The subassembly is further pressed against the bottom surface 12a of the well portion 12 while elastically deforming 44 until it becomes substantially flat. In the middle of the process, when the tip of the first claw portion 45 reaches the groove 15, the pressing of the wall surface 13 to the first claw portion 45 is finished, and the position of the tip of the first claw portion 45 is Return to the original position.

Thereby, the tip of the first claw portion 45 naturally fits into the groove portion 15. Thus, by elastically deforming the second elastic portion 44 until it becomes substantially flat, a gap b (> 0) is secured between the tip of the first claw portion 45 and the upper surface of the groove portion 15. In this way, since the dimensional relationship is such that the gap b can be ensured, the tip of the first claw portion 45 can be reliably fitted in the groove portion 15.

And as shown in FIG.9 (d), the press to the bottom face 12a of the well part 12 of a subassembly is complete | finished. Thereby, the fixing member 40 is pressed upward by the reaction force of the elastic force F 2 of the second elastic portion 44. As a result, the fixing member 40 (accordingly, the sub-assembly) moves relatively upward with respect to the pair of wall surfaces 13, and the state in which the tip of the first claw portion 45 is in contact with (pressed on) the claw portion 15. Maintained. In this way, the sub air chamber member 30 is fixed to the well portion 12 by attaching the subassembly to the well portion 12.

(Action / Effect)
As described above, according to the present embodiment, the sub air chamber member 30 is fixed to the well portion 12 only by attaching the sub assembly including the sub air chamber member 30 and the fixing member 40 to the well portion 12 of the rim 10 (with one touch). The In other words, the process of attaching any member to the well portion 12 is only one process. For this reason, the operation | work which attaches the sub air chamber member 30 to the well part 12 becomes easy compared with the wheel for motor vehicles described in the literature mentioned above.

Further, according to the present embodiment, when the fixing member 40 is attached to the sub air chamber member 30, the upper surface of the sub air chamber member 30 is caused by the elastic force F1 of the first elastic portion 43 as shown in FIG. The state where both end portions in the width direction are in contact (pressed) with the pair of second claw portions 46 of the fixing member 40 can be maintained. Therefore, the generation of noise due to a part of the auxiliary air chamber member 30 colliding with the second claw portion 46 of the fixing member 40 can be suppressed during traveling of the vehicle.

Further, according to the present embodiment, as shown in FIG. 10, the fixing member 40 is pressed toward the outer side in the wheel radial direction by the reaction force of the elastic force F 2 of the second elastic portion 44. Therefore, in a state where the subassembly is disposed between the pair of wall surfaces 13 of the well portion 12, the front end of the first claw portion 45 of the fixing member 40 is paired by the reaction force of the elastic force F 2 of the second elastic portion 44. The state of being in contact (pressed) with the groove portion 15 of the wall surface 13 can be maintained. Therefore, the generation of noise due to the front end of the first claw portion 45 of the fixing member 40 colliding with the groove portion 15 of the pair of wall surfaces 13 can be suppressed during traveling of the vehicle.

Further, according to the present embodiment, the fixing member 40 is integrally formed of a metal plate-like member. Therefore, since the fixing member 40 can be made thin, the size of the auxiliary air chamber member 30 (accordingly, the volume of the tire auxiliary air chamber 35) can be increased under the restriction of the mounting space. In addition, since the elastic force is less likely to decrease due to temperature change, secular change, and the like, compared to the case where the fixing member is made of resin, it is possible to exhibit a stable elastic force over a long period of time. Furthermore, compared with the case where the fixing member is made of resin, the manufacturing of the fixing member 40 itself becomes easy, and the manufacturing cost of the fixing member 40 can be reduced.

Moreover, according to this embodiment, since the 1st nail | claw part 45 is comprised by the flat nail | claw part extended incline toward the wheel-axis direction outer side and the wheel radial direction outer side from the side part 42, it is comparatively small. With force, the sub-assembly can be inserted between the pair of wall surfaces 13 of the well portion 12. In addition, after the sub-assembly is inserted between the pair of wall surfaces 13, the tip of the first claw portion 45 is fitted into the groove 15 provided in the pair of wall surfaces 13, so that the sub-assembly (and thus the sub-air The chamber member can be firmly fixed to the well portion 12.

Further, according to the present embodiment, as shown in FIG. 10, when the auxiliary air chamber member 30 receives a centrifugal force on the outer side in the wheel radial direction during traveling of the vehicle, the auxiliary air chamber member 30 becomes a pair of fixing members 40. The second claw portion 46 (accordingly, the fixing member 40) is pressed outward in the wheel radial direction by the force F3. If this force F3 is received, the 1st nail | claw part 45 of the fixing member 40 will press the groove part 15 of a pair of wall surface 13 to the wheel radial direction outer side with force F4. In this state where the respective forces act, the pair of second claw portions 46 of the fixing member 40 receives the force F3, so that the pair of side surface portions 42 of the fixing member 40 tends to be deformed outward in the wheel axial direction. To do. However, the deformation of the pair of side surface portions 42 is restricted by the pair of wall surfaces 13 facing the pair of side surface portions 42. For this reason, it is difficult for the pair of second claw portions 46 and the auxiliary air chamber member 30 to be disengaged.

The present invention is not limited to the above-described typical embodiment, and various applications and modifications can be considered without departing from the object of the present invention. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

In the above embodiment, as shown in FIG. 6, the bottom surface 12a of the well portion 12 of the rim 10 is parallel to the wheel axial direction. On the other hand, as shown in FIG. 11, the configuration of the present invention can also be applied when the bottom surface 12a of the well portion 12 of the rim 10 is inclined with respect to the wheel axis direction.

Moreover, in the said embodiment, as shown in FIG.6 and FIG.7, the 1st elastic part 43 is a cantilever beam extended in the width direction, curving in the circular arc shape which protrudes upwards from the width direction both ends of the bottom face part 41. The second elastic portion 44 was a doubly-supported plate-like portion extending in the width direction while curving in an arc shape projecting downward from both ends of the bottom surface portion 41 in the width direction. On the other hand, as shown in FIGS. 12 and 13, the first elastic portion 43 is in a cantilever shape extending integrally from the end in the width direction of the bottom portion 41 upward and inward in the width direction. The second elastic portion 44 may be a flat plate-like portion that is cantilevered and extends integrally from the bottom end portion of the bottom surface portion 41 in a downward direction and inward in the width direction. .

Similarly, as shown in FIG. 14 and FIG. 15, the first elastic portion 43 has a cantilever-like shape that extends integrally from the bottom in the width direction center of the bottom surface portion 41 upward and toward the end in the width direction. The second elastic portion 44 may be a flat plate-like portion that is a cantilever-like flat plate portion that is inclined downwardly from the central portion in the width direction of the bottom surface portion 41 and extends integrally toward the end in the width direction. Good.

In the above-described embodiment, as shown in FIGS. 6 to 9, the “third locking portion” is a cantilevered second extending integrally from the upper end portion of the side surface portion 42 toward the inner side in the width direction. The claw portion 46, and the second claw portion 46 was in contact with the end portion in the width direction of the upper surface of the auxiliary air chamber member 30. On the other hand, as shown in FIGS. 16 to 19 corresponding to FIGS. 6 to 9, the “third locking portion” is inclined from the side surface portion 42 toward the inner side in the wheel axial direction and the inner side in the wheel radial direction. The second claw portion 47 is a flat plate-like second claw portion 47 that integrally extends, and the second claw portion 47 is in contact with the edge portion 37 that extends from the side surface of the auxiliary air chamber member 30 to the wheel axis direction outer side. May be. Hereinafter, only differences between this configuration and the above embodiment will be described.

In this configuration, when the fixing member 40 is attached to the auxiliary air chamber member 30, unlike the above embodiment, as shown in FIG. 18, the first elastic member is not elastically deformed to the outside in the width direction as shown in FIG. By simply pressing the bottom surface portion 41 against the lower surface of the sub air chamber member 30 until the portion 43 becomes substantially flat, and then ending the pressing, the mounting of the fixing member 40 to the sub air chamber member 30 is completed.

Further, in this configuration, as shown in FIG. 20, when the auxiliary air chamber member 30 receives a centrifugal force on the outer side in the wheel radial direction while the vehicle is running, the edge 37 of the auxiliary air chamber member 30 becomes the first of the fixing member 40. The two claw portions 47 (therefore, the fixing member 40) are pressed outward in the wheel radial direction with the force F3. If this force F3 is received, the 1st nail | claw part 45 of the fixing member 40 will press the groove part 15 of a pair of wall surface 13 to the wheel radial direction outer side with force F4.

Further, in this configuration, as shown in FIG. 16, the bottom surface 12a of the well portion 12 of the rim 10 was parallel to the wheel axial direction. On the other hand, as shown in FIG. 21, the configuration of the present invention can also be applied when the bottom surface 12a of the well portion 12 of the rim 10 is inclined with respect to the wheel axis direction.

In the above embodiment, the fixing member 40 is integrally formed of a metal plate member, but the fixing member 40 may be integrally formed of resin.

DESCRIPTION OF SYMBOLS 10 ... Rim, 11 ... Bead sheet | seat, 12 ... Well part, 12a ... Bottom face of well part, 13 ... Pair of wall surface, 14 ... Notch part, 15 ... Groove part, 30 ... Secondary air chamber member, 31 ... Recessed part, 32 ... Protrusion , 35 ... tire auxiliary air chamber, 40 ... fixing member, 41 ... bottom surface part, 42 ... pair of side surface parts, 43 ... first elastic part, 44 ... second elastic part, 45 ... first claw part, 46, 47 ... 2nd nail part, T ... tire, TS ... tire main air chamber

Claims

On the outer surface of the rim that divides the tire main air chamber between the tire and the tire, a bead on the outer side of the vehicle that holds the bead of the tire and a bead seat on the inner side of the vehicle are recessed in the wheel radial direction and in the wheel circumferential direction. A wheel rim having a well portion extending;
A sub-air chamber member made of resin having a tire sub-air chamber that extends while curving along the circumferential direction of the wheel and communicates with the tire main air chamber;
A fixing member for fixing the auxiliary air chamber member to the well portion;
An automotive wheel equipped with
The well portion is
A pair of wall surfaces extending in the wheel circumferential direction and facing the wheel axial direction, each of the pair of wall surfaces being provided with a first locking portion;
The fixing member is
A bottom portion and a pair of side portions rising from the bottom portion,
The fixing member is disposed on the auxiliary air chamber member such that the bottom surface portion faces the inner surface in the wheel radial direction of the auxiliary air chamber member and the pair of side surface portions faces both side surfaces of the auxiliary air chamber member. Installed,
The auxiliary air chamber member to which the fixing member is attached is disposed between the pair of wall surfaces so that the bottom surface portion faces the bottom surface of the well portion and the pair of side surface portions faces the pair of wall surfaces. Arranged,
A second locking portion that restricts movement of the fixing member to the outer side in the wheel radial direction with respect to the pair of wall surfaces is provided on each outer side surface of the pair of side surface portions by contacting the first locking portion. And
A third latch for restricting movement of the auxiliary air chamber member to the outer side in the wheel radial direction with respect to the fixed member by abutting a part of the auxiliary air chamber member on each inner side surface of the pair of side surface portions A wheel for automobiles with parts.
The automobile wheel according to claim 1,
The automobile wheel, wherein a first elastic portion that generates an elastic force that presses the inner surface in the wheel radial direction of the auxiliary air chamber member toward the outer side in the wheel radial direction is provided on a bottom surface portion of the fixing member.
The automobile wheel according to claim 1 or 2,
The wheel for motor vehicles provided with the 2nd elastic part which generate | occur | produces the elastic force which presses the bottom face of the said well part toward a wheel radial direction inner side at the bottom face part of the said fixing member.
The automobile wheel according to any one of claims 1 to 3,
The fixing member is an automobile wheel integrally formed of a metal plate-like member.
The automobile wheel according to claim 4,
The bottom part is a flat part,
The first elastic portion is a vehicle wheel that is a plate-like portion that extends integrally from the bottom surface portion and is located on the outer side in the wheel radial direction with respect to the plane of the bottom surface portion.
In the automobile wheel according to claim 4 or 5,
The bottom part is a flat part,
The said 2nd elastic part is a wheel for motor vehicles which is a plate-shaped part which is located in the wheel radial direction inner side with respect to the plane of the said bottom face part while extending integrally from the said bottom face part.
The automobile wheel according to any one of claims 4 to 6,
The first locking portion is a groove extending in the wheel circumferential direction,
The pair of side surface portions are a pair of flat plate-like portions that bend and rise from the flat plate-shaped bottom surface portion,
The second locking portion is a flat plate-like first claw portion that is inclined and integrally extended from the side surface portion toward the wheel axial direction outer side and the wheel radial direction outer side, and the groove portion includes the first claw portion. A wheel for an automobile in which movement of the fixing member to the outer side in the wheel radial direction with respect to the pair of wall surfaces is restricted by fitting a tip.
The automobile wheel according to any one of claims 4 to 7,
The pair of side surface portions are a pair of flat plate-like portions that bend and rise from the flat plate-shaped bottom surface portion,
The third locking portion is a flat plate-like second claw portion that integrally extends from a tip portion on the outer side in the wheel radial direction of the side surface portion toward the inner side in the wheel axis direction. A wheel for an automobile in which movement of the auxiliary air chamber member to the outer side in the wheel radial direction with respect to the fixed member is restricted by contact of a wheel radial direction outer surface of the chamber member.
The automobile wheel according to any one of claims 1 to 8,
An automobile wheel in which a concave portion into which the bottom surface portion and the pair of side surface portions are fitted is formed at a portion of the surface of the auxiliary air chamber member where the fixing member is mounted.
The automobile wheel according to any one of claims 1 to 9,
A part of the pair of wall surfaces is provided with a notch that opens to the outside in the wheel radial direction,
The automobile wheel, wherein a portion of the surface of the auxiliary air chamber member where the fixing member is not mounted is provided with a protrusion that protrudes outward in the wheel axial direction and fits into the notch.