JP2021004634A - Disc rotor assembly and attenuation member - Google Patents

Abstract

To provide a new attenuation member having less problem such that it is hardly separated or attenuation effect is easily achieved, or a disc rotor assembly having the attenuation member.SOLUTION: A disc rotor assembly of the present disclosure includes, for example, a disc rotor having a disc-like first bottom wall, a cylindrical first side wall extended in a first direction crossing the first bottom wall from a first outer edge of the first bottom wall, and a flange protruded to a radial outer part of the first side wall from an end portion in the first direction of the first side wall, and an attenuation member having a disc-like second bottom wall fixed in a state of being held between a first face as one of an inner side end face in the first direction of the first bottom wall and an outer end face in a direction opposite to the first direction, and a second face of a member connected to the first bottom wall, and a second side wall extended in the first direction along the first side wall from a second outer edge of the second bottom wall, and at least partially kept into contact with the first side wall.SELECTED DRAWING: Figure 3

Description

The present disclosure relates to disc rotor assemblies and damping members.

Conventionally, in order to reduce vibration during braking and noise (so-called squeal) due to the vibration of a disc rotor having a bottomed tubular portion and a flange, a ring-shaped damping member is attached to the tubular portion. Disc rotors are known (eg, Patent Document 1).

Chinese Patent Application Publication No. 1096462627

In the disc rotor assembly of Patent Document 1, the ring-shaped damping member is attached to, for example, a tubular portion by fitting. However, when the damping member is attached to the tubular portion by press fitting with a relatively small fitting force, there is a concern that the damping member may fall off from the tubular portion. On the other hand, when the damping member is attached to the tubular portion by press fitting having a relatively large fitting force, there is a concern that the damping effect of the damping member will be reduced. That is, in the configuration in which the ring-shaped member is mounted on the tubular portion by fitting, there is a possibility that it is difficult to prevent the damping member from falling off and to achieve the required damping effect of the damping member at the same time. ..

Therefore, one of the problems of the present disclosure is to obtain, for example, a new damping member having less inconvenience such that it is more difficult to fall off or a damping effect can be easily obtained, or a disk rotor assembly having the damping member. ,.

The disc rotor assembly of the present disclosure includes, for example, a disc-shaped first bottom wall and a tubular first side wall extending from the first outer edge of the first bottom wall in the first direction intersecting the first bottom wall. And a disc rotor having a flange protruding outward in the radial direction of the first side wall from the end portion of the first side wall in the first direction, and an inner end surface of the first bottom wall in the first direction. Alternatively, a disk shape fixed in a state of being sandwiched between the first surface, which is one of the outer end faces in the direction opposite to the first direction, and the second surface of the member connected to the first bottom wall. A second side wall extending from the second outer edge of the second bottom wall in the first direction along the first side wall and at least partially in contact with the first side wall. It includes a damping member.

Further, the damping member of the present disclosure includes a disk-shaped first bottom wall and a tubular first side wall extending from the first outer edge of the first bottom wall in the first direction intersecting the first bottom wall. , A damping member attached to a disc rotor having a flange protruding outward in the radial direction of the first side wall from the end of the first side wall in the first direction, and the above-mentioned first bottom wall. In a state of being sandwiched between the first surface, which is one of the inner end surface in the first direction or the outer end surface in the direction opposite to the first direction, and the second surface of the member to be connected to the first bottom wall. A disk-shaped second bottom wall to be fixed and a second that extends from the second outer edge of the second bottom wall in the first direction along the first side wall and is at least partially in contact with the first side wall. It has a side wall.

In the above configuration, the damping member is attached to the disc rotor with the second bottom wall of the damping member sandwiched between the first surface of the first bottom wall of the disc rotor and the second surface of the other member. Be done. Therefore, it is possible to obtain a damping member that is more difficult to fall off and a more appropriate damping effect can be obtained, and a disc rotor assembly having the damping member.

FIG. 1 is an exemplary and schematic cross-sectional view of the wheel, disc rotor assembly, and hub of the first embodiment in a interconnected state. FIG. 2 is an exemplary and schematic exploded perspective view of the disc rotor assembly of the first embodiment. FIG. 3 is an enlarged view of a part of FIG. FIG. 4 is an exemplary and schematic exploded perspective view of the disc rotor assembly of the second embodiment. FIG. 5 is an exemplary and schematic cross-sectional view of a portion of the wheel, disc rotor, and hub of the first embodiment in a connected state.

Hereinafter, exemplary embodiments of the present invention will be disclosed. The configurations of the embodiments shown below, as well as the actions and results (effects) brought about by the configurations, are examples. The present invention can also be realized by configurations other than those disclosed in the following embodiments. Further, according to the present invention, it is possible to obtain at least one of various effects (including derivative effects) obtained by the configuration.

The plurality of embodiments shown below have similar configurations. Therefore, according to the configuration of each embodiment, the same action and effect based on the similar configuration can be obtained. Further, in the following, the same reference numerals are given to those similar configurations, and duplicate explanations may be omitted.

In the present specification, ordinal numbers are given for convenience in order to distinguish parts, parts, etc., and do not indicate priorities or orders.

Further, in each figure, the front of the vehicle is indicated by an arrow X, the outside of the direction parallel to the rotation center Ax of the wheel 40 in the vehicle width direction is indicated by an arrow Y, and the upper portion of the vehicle is indicated by an arrow Z. Direction X, direction Y, and direction Z are orthogonal to each other. Further, in the following, the axial direction of the rotation center Ax is simply referred to as an axial direction, the radial direction of the rotation center Ax is simply referred to as a radial direction, and the circumferential direction of the rotation center Ax is simply referred to as a circumferential direction. In the mounted state on the vehicle, the axial direction of the cylindrical side wall 12 of the disc rotor 10 is the axial direction of the rotation center Ax, the radial direction of the side wall 12 is the radial direction of the rotation center Ax, and the circumference of the side wall 12. The direction is the circumferential direction of the rotation center Ax.

[First Embodiment]
FIG. 1 is a cross-sectional view of the wheel 40, the disc rotor assembly 100, and the hub 30 of the present embodiment in a state of being assembled to each other. The wheel 40 has a bottom wall 41 and a peripheral wall 42. The bottom wall 41 has a disk-like shape. The peripheral wall 42 has a cylindrical shape and projects inward in the vehicle width direction from the outer edge of the bottom wall 41. A recess 43 is formed by the bottom wall 41 and the peripheral wall 42, and the disc rotor assembly 100 and the hub 30 are housed in the recess 43. Further, a recess 15 is formed by the bottom wall 11 and the side wall 12 of the disc rotor 10 included in the disc rotor assembly 100, and the hub 30 is housed in the recess 15.

The hub 30 has a support member 31, a rotating member 32, and a bearing 33. The support member 31 has an outer cylinder 31a and a flange 31b, and the rotating member 32 has an inner cylinder 32a and a flange 32b. The bearing 33 is located between the outer cylinder 31a and the inner cylinder 32a. The inner cylinder 32a, that is, the rotating member 32 is rotatably supported by the outer cylinder 31a, that is, the supporting member 31 via the bearing 33 around the rotation center Ax.

Then, as shown in FIG. 1, the flange 32b of the rotating member 32 of the hub 30, the bottom wall 21 of the damping member 20 included in the disc rotor assembly 100, and the bottom wall of the disc rotor 10 included in the disc rotor assembly 100. 11 and the bottom wall 41 of the wheel 40 are overlapped in the vehicle width direction, and are sandwiched between the head 34a of the bolt 34 penetrating them and the nut (not shown) connected to the bolt 34. And are combined. That is, the hub 30, the wheel 40, and the disc rotor assembly 100 are connected by bolts 34 and nuts. Bolts 34 and nuts can also be referred to as fittings. The hub 30 is an example of a member to be coupled to the disc rotor 10.

FIG. 2 is a perspective view of the disc rotor assembly 100. FIG. 3 is an enlarged view of a part of FIG. As shown in FIG. 2, the disc rotor assembly 100 includes a disc rotor 10 and a damping member 20.

As shown in FIG. 2, the disc rotor 10 has a hat shape. The disc rotor 10 has a bottom wall 11, a side wall 12, and a flange 13.

As shown in FIGS. 2 and 3, the bottom wall 11 has a disk-like shape, and intersects and is orthogonal to the rotation center Ax. The side wall 12 has a cylindrical shape and extends axially, in other words, inward in the vehicle width direction from the outer edge 11a of the bottom wall 11. The side wall 12 may also be referred to as a peripheral wall or a tubular wall. The bottom wall 11 is an example of the first bottom wall, the outer edge 11a is an example of the first outer edge, and the side wall 12 is an example of the first side wall. Further, the inside in the vehicle width direction, that is, the direction opposite to the direction Y is an example of the first direction.

The flange 13 has an annular shape and a plate shape, and intersects and is orthogonal to the rotation center Ax. The flange 13 projects radially outward from the end portion 12c of the side wall 12 opposite to the bottom wall 11. The inner end surface 13c of the flange 13 in the axial direction and the outer end surface 13d of the flange 13 outward in the axial direction both intersect and are orthogonal to the axial direction. The inner end surface 13c and the outer end surface 13d are braking surfaces on which a braking member (not shown) is pressed by the caliper.

Further, as shown in FIG. 2, the flange 13 is provided with an air passage 14 penetrating in the radial direction between the inner edge 13a and the outer edge 13b. That is, the disc rotor 10 is an air-cooled disc rotor. The air passage 14 may extend along the radial direction, and the outer end 14b of the air passage 14 opening to the outer edge 13b may refer to the inner end 14a of the air passage 14 opening to the inner edge 13a when the vehicle is moving forward. It may be tilted with respect to the radial direction so that the wheel 40 is positioned so as to be displaced in the rotation direction. The outer edge 13b is an example of the third outer edge.

The disc rotor 10 can be made of, for example, a metallic material such as gray cast iron, but is not limited thereto.

As shown in FIGS. 2 and 3, the damping member 20 has a bottomed tubular shape. The damping member 20 has a bottom wall 21 and a side wall 22. When the disc rotor 10 vibrates, the damping member 20 slides relative to the disc rotor 10 to convert vibration energy (kinetic energy) into thermal energy and dampen the vibration of the disc rotor 10.

The bottom wall 21 has a disk-like shape, and intersects and is orthogonal to the rotation center Ax. The side wall 22 has a substantially cylindrical shape, and extends from the outer edge 21a of the bottom wall 21 in the axial direction, in other words, inward in the vehicle width direction. The side wall 22 may also be referred to as a peripheral wall or a tubular wall. The bottom wall 21 is an example of the second bottom wall, the outer edge 21a is an example of the second outer edge, and the side wall 22 is an example of the second side wall.

The damping member 20 can be made of, for example, a metal material such as stainless steel, but is not limited thereto.

The inner end surface 11c on the inner side in the axial direction and the outer end surface 11d on the outer side in the axial direction of the bottom wall 11 of the disc rotor 10 both have a flat and circular shape and intersect with the axial direction. And it is orthogonal. Further, the inner peripheral surface 12a on the inner side of the side wall 12 of the disc rotor 10 in the radial direction is the inner surface of the cylinder, and the outer peripheral surface 12b on the inner side in the radial direction of the side wall 12 is the outer surface of the cylinder. That is, both the inner peripheral surface 12a and the outer peripheral surface 12b are along the axial direction and along the circumferential direction.

The bottom wall 21 of the damping member 20 is fixed in a state of being sandwiched between the inner end surface 11c of the bottom wall 11 of the disc rotor 10 and the end surface 32b1 of the flange 32b of the rotating member 32 of the hub 30. That is, the bottom wall 21 of the damping member 20 is sandwiched between the bottom wall 11 and the flange 32b. The inner end surface 11c is an example of the first surface, and the end surface 32b1 is an example of the second surface.

The bottom wall 11 of the disc rotor 10 is provided with a through hole 11b, and the bottom wall 21 of the damping member 20 is provided with a through hole 21b. The bolt 34 (see FIG. 1) penetrates the through hole 11b and the through hole 21b that overlap in the axial direction.

The side wall 22 of the damping member 20 has a first portion 22a and a second portion 22b. The first portion 22a extends inward in the vehicle width direction from the outer edge 21a of the bottom wall 21. The first part 22a is adjacent to the bottom wall 21, the second part 22b is adjacent to the first part 22a, and is located on the opposite side of the first part 22a from the bottom wall 21. In other words, the first part 22a is located inside the bottom wall 21 in the vehicle width direction and outside the second part 22b in the vehicle width direction, and the second part 22b is located in the vehicle width direction of the first part 22a. It is located inward. The outer edge 21a is an example of the second outer edge.

The first portion 22a has a cylindrical shape and extends along the inner peripheral surface 12a of the side wall 12 of the disc rotor 10. At the radial inward end of the first portion 22a, the inner peripheral surface 22c extends axially. The inner peripheral surface 22c is a cylindrical inner surface. At the radial outer end of the first portion 22a, the outer peripheral surface 22d extends axially. The outer peripheral surface 22d is a cylindrical outer surface.

As described above, in order to suppress the vibration of the disc rotor 10, in the disc rotor assembly 100, the outer peripheral surface 22d of the damping member 20 and the inner peripheral surface 12a of the side wall 12 of the disc rotor 10 slide relative to each other to generate thermal energy. Is configured so that Therefore, the first portion 22a of the damping member 20 is inserted into the side wall 12 of the disc rotor 10 with, for example, a fitting (tight fitting) having a certain degree of tightening allowance. The outer peripheral surface 22d does not need to be in contact with the inner peripheral surface 12a as a whole, but may be partially in contact with the inner peripheral surface 12a as long as the damping effect due to sliding can be obtained.

On the other hand, the second portion 22b has a truncated cone shape. The diameter of the second portion 22b gradually increases from the inward end in the vehicle width direction of the first portion 22a toward the inward in the vehicle width direction. Further, as shown in FIG. 3, the second portion 22b straddles the inner end 14a of the air passage 14 in the vehicle width direction, is opposite to the side wall 12 with respect to the air passage 14, and is the inner edge 13a of the flange 13. Is in contact with. The second portion 22b may also be referred to as an extension.

Like the first portion 22a, the second portion 22b also preferably slides with the inner edge 13a of the flange 13 when the disc rotor 10 vibrates. Therefore, for example, the damping member 20 is mounted on the inner diameter of the inner edge 13a so that the inner end 22b1 of the second portion 22b in the vehicle width direction is pressed against the inner edge 13a of the flange 13 by the elasticity of the second portion 22b. It is set smaller than the outer diameter of the end portion 22b1 in the free state. As an example, the inner diameter of the inner edge 13a is set to be smaller than the outer diameter of the end portion 22b1 in the free state at the lower limit values in the operating temperature range and the environmental temperature range.

Further, in this case, the specifications of the end portion 22b1 and the inner edge 13a are set so that the contact state between the end portion 22b1 and the inner edge 13a is maintained in the temperature range from low temperature to high temperature in the usage state of the flange 13. Therefore, for example, the damping member 20 may be made of a material having a coefficient of linear expansion higher than the coefficient of linear expansion of the disc rotor 10. The end portion 22b1 is an example of a contact portion.

Further, as shown in FIGS. 2 and 3, the second portion 22b is provided with an opening 22b2 that penetrates the second portion 22b in the radial direction. The opening 22b2 faces the inner end 14a of the air passage 14. In the present embodiment, the opening 22b2 is a through hole, but the present invention is not limited to this, and the opening 22b2 may be, for example, a notch.

The second portion 22b has fins 22e adjacent to the opening 22b2. As shown in FIG. 2, the fins 22e are provided adjacent to the opening 22b2 so as to cover the radial inside of the opening 22b2 with a gap. Specifically, for example, the opening 22b2 has a quadrangular shape, and the two peripheral edges of the opening 22b2 extend in the axial direction, respectively, and the fin 22e is one of the two end edges. The disc rotor 10 is cut up from the edge opposite to the rotation direction CW when the vehicle is moving forward, and extends inward in the radial direction toward the rotation direction CW. In other words, the fins 22e intersect in the circumferential direction and the radial direction so as to gradually move away from the root portion toward the rotation direction CW of the disc rotor 10 when the vehicle moves forward.

As described above, in the present embodiment, the bottom wall 21 (second bottom wall) of the damping member 20 is the inner end surface 11c (first surface) of the bottom wall 11 (first bottom wall) of the disc rotor 10. , The hub 30 (member to be coupled) is fixed in a state of being sandwiched between the end surface 32b1 (second surface) of the flange 32b, and the outer peripheral surface 22d of the side wall 22 (second side wall) of the damping member 20 is a disk. It is at least partially in contact with the inner peripheral surface 12a of the side wall 12 (first side wall) of the rotor 10. According to such a configuration, the vibration energy (kinetic energy) generated when the disc rotor 10 vibrates is converted into thermal energy by sliding between the outer peripheral surface 22d and the inner peripheral surface 12a, and the vibration and the sound accompanying the vibration are produced. (So-called squeal) can be suppressed. Further, by sandwiching the bottom wall 21 between the inner end surface 11c and the end surface 32b1, it is possible to prevent the damping member 20 from falling off from the disc rotor 10. According to the present embodiment, the portion where the damping member 20 is attached (bottom wall 21) and the portion where the damping member 20 slides (side wall 22) are separated to prevent the damping member 20 from falling off and to be damped. It is easy to achieve both improvement of the damping effect by the member 20.

Further, in the present embodiment, the opening 22b2 is provided on the side wall 22 (second side wall) of the damping member 20. According to such a configuration, for example, the damping member 20 can be made lighter than the configuration in which the opening 22b2 is not provided, and the frequency of the vibration damped by adjusting the elasticity (rigidity) can be adjusted. You can get the effect of being easy.

Further, in the present embodiment, the side wall 22 (second side wall) of the damping member 20 is on the opposite side of the air passage 14 provided on the flange 13 from the outer edge 21a (second outer edge) of the bottom wall 21 (second bottom wall). The opposite end 22b1 (contact portion) of the side wall 22 is in contact with the inner edge 13a of the flange 13. According to such a configuration, for example, the damping effect can be further enhanced by the amount of the portion sliding with the disc rotor 10. Further, since the side wall 22 is provided with an opening 22b2 facing the inner end 14a of the air passage 14, for example, it is possible to avoid a situation in which the air flow is blocked by the side wall 22 and the cooling performance is deteriorated. it can.

Further, in the present embodiment, the end portion 22b1 (contact portion) is pressed against the inner edge 13a of the flange 13 by the elasticity of the side wall 22 (second side wall). According to such a configuration, for example, since the end portion 22b1 and the inner edge 13a can be more reliably brought into contact with each other, the vibration damping effect due to the sliding between the end portion 22b1 and the inner edge 13a can be obtained more reliably. it can. Further, even when the disc rotor 10 is thermally expanded as the temperature rises, it is possible to obtain a state in which the end portion 22b1 and the inner edge 13a are in contact with each other, whereby in the environmental temperature range and the operating temperature range. , The damping effect of vibration due to the sliding between the end portion 22b1 and the inner edge 13a can be obtained more reliably.

Further, in the present embodiment, the fins 22e face the opening 22b2 with a gap at least partially, and extend inward in the radial direction toward the rotation direction CW of the disc rotor 10 when the vehicle moves forward. According to such a configuration, for example, the fins 22e can be rotated when the vehicle is moving forward to send air out through the openings 22b2 in the radial direction. Therefore, the air flow rate passing through the air passage 14 can be increased as compared with the case without the fins 22e, and the cooling performance of the flange 13 and the disc rotor 10 by the air passing through the air passage 14 can be further improved. it can.

Further, in the present embodiment, the side wall 22 (second side wall) of the damping member 20 is located inward in the radial direction of the side wall 12 (first side wall) of the disc rotor 10, and the linear expansion coefficient of the damping member 20 is the disc rotor. It may be higher than the coefficient of linear expansion of 10. According to such a configuration, for example, even if the temperature of the flange 13 and thus the disc rotor 10 rises due to friction with the braking member, the state in which the side wall 22 and the side wall 12 are in contact with each other can be easily maintained, which in turn makes it easier to maintain the contact state. , The vibration damping effect due to the sliding between the side wall 22 and the side wall 12 can be obtained more reliably.

[Second Embodiment]
FIG. 4 is an exploded perspective view of the disc rotor assembly 100A of the present embodiment, and FIG. 5 is a cross-sectional view of the wheel 40, the disc rotor assembly 100A, and the hub 30 of the present embodiment in a connected state.

As will be clear when FIGS. 4 and 5 are compared with FIGS. 2 and 3, in the present embodiment, the mounting position of the damping member 20A with respect to the disc rotor 10 is different from that of the first embodiment. Specifically, the damping member 20A is located outside the vehicle width direction with respect to the disc rotor 10, and the bottom wall 21 of the damping member 20A is located outside the vehicle width direction of the bottom wall 11 of the disc rotor 10. At the same time, the side wall 22 of the damping member 20A is located radially outward of the side wall 12 of the disc rotor 10. Further, in the present embodiment, the damping member 20A does not have a portion corresponding to the second portion 22b.

As shown in FIG. 5, the bottom wall 21 of the damping member 20A is sandwiched between the outer end surface 11d of the bottom wall 11 of the disc rotor 10 and the bottom surface 41a of the bottom wall 41 of the wheel 40. It is fixed. That is, the bottom wall 21 of the damping member 20 is sandwiched between the bottom wall 11 and the bottom wall 41. The wheel 40 is an example of a member to be coupled to the disc rotor 10. The outer end surface 11d is an example of the first surface, and the bottom surface 41a is an example of the second surface.

Further, in the present embodiment, in order to suppress the vibration of the disc rotor 10, in the disc rotor assembly 100, the inner peripheral surface 22c of the damping member 20A and the outer peripheral surface 12b of the side wall 12 of the disc rotor 10 slide relatively. It is configured to be able to generate thermal energy. Therefore, the side wall 12 of the disc rotor 10 is inserted into the side wall 22 of the damping member 20A, for example, with a fitting (tight fitting) having a certain degree of tightening allowance. The inner peripheral surface 22c does not need to be in contact with the outer peripheral surface 12b as a whole as long as the damping effect due to sliding can be obtained, and may be partially in contact with the outer peripheral surface 12b.

As described above, in the present embodiment, the bottom wall 21 (second bottom wall) of the damping member 20A is the outer end surface 11d (first surface) of the bottom wall 11 (first bottom wall) of the disc rotor 10. , The inner peripheral surface 22c of the side wall 22 (second side wall) of the damping member 20A is fixed so as to be sandwiched between the bottom wall 41 of the wheel 40 (member to be connected) and the bottom surface 41a (second surface). , At least partially in contact with the outer peripheral surface 12b of the side wall 12 (first side wall) of the disc rotor 10. According to such a configuration, the vibration energy (kinetic energy) generated when the disc rotor 10 vibrates is converted into thermal energy by sliding between the inner peripheral surface 22c and the outer peripheral surface 12b, and the vibration and the sound accompanying the vibration are produced. (So-called squeal) can be suppressed. Further, by sandwiching the bottom wall 21 between the outer end surface 11d and the bottom surface 41a, it is possible to prevent the damping member 20A from falling off from the disc rotor 10. Also in this embodiment, the portion where the damping member 20A is attached (bottom wall 21) and the portion where the damping member 20A slides (side wall 22) are separated to prevent the damping member 20A from falling off and the damping member. It is easy to achieve both the improvement of the damping effect by 20A.

Although the embodiments of the present invention have been exemplified above, the above-described embodiment is an example and is not intended to limit the scope of the invention. The above-described embodiment can be implemented in various other forms, and various omissions, replacements, combinations, and changes can be made without departing from the gist of the invention. In addition, specifications such as each configuration and shape (structure, type, direction, model, size, length, width, thickness, height, number, arrangement, position, material, etc.) are changed as appropriate. Can be carried out.

For example, the damping member may be made of a metal material other than the iron-based material, or may be made of a material different from the metal material such as an elastomer or a synthetic resin material. Further, at least one of the sliding portions (contact portions) between the disc rotor and the damping member (for example, at least one of the inner peripheral surface of the first side wall and the outer peripheral surface of the second side wall that are in contact with each other), the contact portion and the flange that are in contact with each other. At least one of the inner edges of the above, and at least one of the outer peripheral surface of the first side wall and the inner peripheral surface of the second side wall in contact with each other) may be provided with a coating having adjustable slidability and lubricity. Such a coating may be applied, for example, by spray painting or baking of a special paint such as a fluororesin paint.

Further, the form of the opening penetrating the second side wall in the radial direction may be a notch, or the opening may be provided at a position adjacent to the first side wall.

10 ... Disc rotor, 11 ... Bottom wall (first bottom wall), 11a ... Outer edge (first outer edge), 11c ... Inner end face (first surface), 11d ... Outer end face (first face), 12 ... Side wall (first surface) (One side wall), 12c ... end, 13 ... flange, 13a ... inner edge, 13b ... outer edge (third outer edge), 14 ... air passage, 20, 20A ... damping member, 21 ... bottom wall (second bottom wall), 21a ... outer edge (second outer edge), 22 ... side wall (second side wall), 22b1 ... end (contact part), 22b2 ... opening, 22e ... fin, 30 ... hub (member to be joined), 32b1 ... end face (second) Surface), 40 ... Wheel (member to be joined), 41a ... Bottom surface (second surface), 100, 100A ... Disc rotor assembly.

Claims (6)

A disk-shaped first bottom wall, a tubular first side wall extending from the first outer edge of the first bottom wall in the first direction intersecting the first bottom wall, and the first side wall of the first side wall. A disc rotor having a flange protruding radially outward from the end in the direction of the first side wall, and
The first surface of the first bottom wall, which is one of the inner end surface in the first direction or the outer end surface in the direction opposite to the first direction, and the second surface of the member connected to the first bottom wall. A disk-shaped second bottom wall fixed in a sandwiched state, and extending from the second outer edge of the second bottom wall in the first direction along the first side wall and at least on the first side wall. A damping member having a second side wall that is partially in contact with the
Disc rotor assembly with. The disc rotor assembly according to claim 1, wherein the second side wall is provided with an opening that penetrates in the radial direction of the first side wall. The flange is provided with a plurality of air passages arranged in the circumferential direction of the first side wall and penetrating between the inner edge of the flange and the third outer edge of the flange.
The second side wall has a contact portion extending from the second outer edge in the first direction to the opposite side of the air passage and in contact with the inner edge of the flange on the opposite side.
The disc rotor assembly according to claim 2, wherein the opening faces the air passage. The disc rotor assembly according to claim 3, wherein the contact portion is pressed against the inner edge by the elasticity of the second side wall. The second side wall faces the opening at least partially with a gap, and fins extending inward in the radial direction of the first side wall as the disc rotor rotates in the vehicle forward direction. The disc rotor assembly according to any one of claims 2 to 4. A disk-shaped first bottom wall, a tubular first side wall extending from the first outer edge of the first bottom wall in the first direction intersecting the first bottom wall, and the first side wall of the first side wall. A damping member attached to a disc rotor having a flange protruding radially outward from the first side wall from the end in the direction.
The first surface of the first bottom wall, which is one of the inner end surface in the first direction or the outer end surface in the direction opposite to the first direction, and the second surface of the member connected to the first bottom wall. A disk-shaped second bottom wall fixed in a sandwiched state, and extending from the second outer edge of the second bottom wall in the first direction along the first side wall and at least on the first side wall. A damping member having a second side wall that is partially in contact with each other.

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