JP2009179074A - Wheel structure - Google Patents

Abstract

A wheel structure capable of effectively cooling both surfaces of a brake disk is provided.
A wheel structure includes a wheel disc having an opening formed therein, a tire wheel to which a tire is mounted, a brake disc that rotates integrally with the tire wheel, and a brake disc. An air scoop 15 that is disposed in the vehicle width direction in an opposed state and extends so as to incline in the vehicle width direction toward the front of the vehicle, and is disposed between the wheel disk 8 and the brake disk 11. A rectifying cover 16 extending so as to cover it.
[Selection] Figure 2

Description

  The present invention relates to a wheel structure applied to a vehicle such as an automobile.

  As a wheel structure applied to a vehicle, a deflector plate is provided between a spider (wheel disc) of a wheel on which a tire is mounted and a brake disc, and the inner side in the axial direction of the wheel disc is blocked by the deflector plate. It is known that the brake dust generated from the engine is prevented from passing through the wheel disc to the outer wheel portion (Patent Document 1). In the wheel structure of this document, a slot is formed in the deflector plate, and the slot forms an air scoop that supplies cooling air to the brake while the vehicle is running. In addition, there is Patent Document 2 as a prior art document related to the present invention.

Japanese Patent Laid-Open No. 62-261723 Registered Utility Model No. 304973

  The wheel structures of these documents cool the brake disc by supplying air from the outside in the axial direction of the wheel disc toward the inside in the axial direction, in other words, from the outside in the vehicle width direction to the inside. However, since the flow of air supplied to the brake during traveling is limited in one direction, there is a risk that the surface on the opposite side to the side supplied with air will be insufficiently cooled.

  Then, an object of this invention is to provide the wheel structure which can cool both surfaces of a brake disk effectively.

  The wheel structure of the present invention is a wheel structure applied to a vehicle, and includes a wheel disk having an opening formed therein, a tire wheel on which a tire is mounted, and a brake disk that rotates integrally with the tire wheel. And an inner member that is disposed on the inner side in the vehicle width direction of the vehicle in a state of facing the brake disc and extends so as to incline in the vehicle width direction toward the front of the vehicle, the wheel disc, and the brake disc And the outer member that extends so as to cover the brake disc, the above-described problem is solved.

  According to this wheel structure, since the inner member extends so as to incline in the vehicle width direction toward the front of the vehicle, air can be taken into the brake disc as the vehicle travels forward. Since the air taken in by the inner member is suppressed by the outer member from coming out of the opening of the wheel disc, the air can be guided not only to the inner surface of the brake disc but also to the outer surface. Thereby, the cooling property with respect to the outer surface of a brake disk improves. As a result, both sides of the brake disk can be effectively cooled. Moreover, since the scattering of brake dust to the wheel side can be suppressed by the outer member, the tire wheel can be made difficult to get dirty.

  In one aspect of the wheel structure according to the present invention, the outer member may be provided with a through hole at a position biased toward the rotation center side of the brake disk. According to this aspect, the escape of air taken in by the inner member is improved, and the air flow from the outer peripheral side of the brake disk toward the center side can be effectively formed. Thereby, the cooling property with respect to the outer surface of a brake disk further improves.

  In this aspect, the outer member includes a flat portion that extends parallel to the brake disk, and a retreating portion that retreats outward in the vehicle width direction of the vehicle following the flat portion, The through hole may be located at a boundary with the receding portion (claim 3). In this case, the air guided to the outer surface of the brake disk by the outer member passes through the retreating portion so as to pass through the through hole, so that the brake dust can be easily held on the inner surface of the retreating portion.

  In one aspect of the wheel structure of the present invention, the outer member may be provided with a protrusion protruding to the side facing the brake disc (claim 4). According to this aspect, the air guided to the outer surface of the brake disk is disturbed by the protrusions, so that a vortex can be generated between the brake disk and the outer member. Since the heat exchange between the brake disc and the air is promoted by the vortex, the cooling performance with respect to the outer surface of the brake disc can be further improved.

  According to the wheel structure of the present invention, since the air taken in by the inner member can be suppressed by the outer member from escape from the opening of the wheel disc, it can be guided not only to the inner surface of the brake disc but also to the outer surface. it can. Thereby, the cooling property with respect to the outer surface of a brake disc improves, and it becomes possible to cool both surfaces of a brake disc effectively. In addition, since the scattering of brake dust to the wheel side can be suppressed by the outer member, the wheel disk can be made difficult to get dirty.

  FIG. 1 shows a right front wheel portion of a vehicle to which a wheel structure according to one embodiment of the present invention is applied, and FIG. 2 shows a state where the inside of the right front wheel portion of FIG. 1 is viewed from the direction of arrow II. . In these drawings, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow IN indicates the inner side in the vehicle width direction, and arrow OUT indicates the outer side in the vehicle width direction.

  In these drawings, the wheel structure 1 includes a tire wheel 2 on which a tire 5 is mounted, a disc brake 3, and a rectifying mechanism 4 for taking air into the brake 3 and cooling it. The tire wheel 2 includes a rim 6 that supports the tire 5, a hub 7 that is attached to the hub carrier 9 with a nut 10, and a wheel disk 8 that couples the rim 6 and the hub 7. The wheel disk 8 is provided with an arcuate opening 8a along the circumferential direction thereof.

  The brake 3 includes a brake disc 11 that rotates integrally with the tire wheel 2 and a brake caliper 12 that sandwiches the brake disc 11 from both sides during braking. The brake disc 11 is configured as a ventilated disc, and has an inner side surface 11a on the inner side in the vehicle width direction and an outer side surface 11b on the outer side in the vehicle width direction. The brake caliper 12 is provided with a pair of brake pads (not shown) facing the brake disc 11 and configured to press these brake pads against the brake disc 11 using hydraulic pressure.

  The rectifying mechanism 4 is disposed on the inner side in the vehicle width direction, facing the brake disk 11, and on the outer side in the vehicle width direction and between the wheel disk 8 and the brake disk 11. And a rectifying cover 16 as an outer member. The air scoop 15 extends toward the vehicle front side so as to incline in the vehicle width direction, and the tip end portion 15a is located on the vehicle width direction inner side than the rim 2. Therefore, air can be taken into the brake disc 11 as the vehicle travels forward.

  The rectifying cover 16 extends so as to cover the brake disk 11 from the outer surface 11a side. The rectifying cover 16 is attached to the hub carrier 9 by being fastened together with the tire wheel 2 by the nut 10. As shown in FIG. 2, the rectifying cover 16 has a flat portion 16a extending in parallel to the brake disc 11, and a retreating portion 16b retreating outward in the vehicle width direction following the flat portion 16a. A plurality of elongated through holes 16c extending in an arc shape are formed at the boundary between the portion 16a and the receding portion 16b. The through hole 16 c is provided at a position biased toward the rotation center side of the brake disk 11.

  As indicated by the solid line arrow in FIG. 2, due to the above-described configuration of the rectifying mechanism 4, the air taken in by the air scoop 15 passes through the inner side surface 11 a of the bouquet disc 11 and the brake caliper 12, The first flow through the through hole 16c and the second flow through the outer surface 11b of the brake disk 11 into the through hole 16c are divided. If the rectifying cover 16 is not provided, the air taken in by the air scoop 15 does not pass through the outer surface 11b of the brake disc 11 as shown by the broken arrow in FIG. Will come out of the opening 8a. That is, according to the rectifying mechanism 4, the air taken in by the air scoop 15 by the rectifying cover 16 can be prevented from coming out of the opening 8, and therefore air can be guided also to the outer surface 11 b of the brake disk 11. it can. Thereby, the cooling property with respect to the outer side surface 11b improves.

  Further, since the brake dust generated by the brake 3 is prevented from scattering toward the tire wheel 2 by the rectifying cover 16, the tire wheel 2 can be made difficult to get dirty. Moreover, in the illustrated embodiment, the air guided to the outer surface 11b of the brake disk 11 passes through the retreating portion 16b of the rectifying cover 16 and passes through the through hole 16c, so that the brake dust is held on the inner surface of the retreating portion 16b. It becomes easy. For this reason, the tire wheel 2 becomes more difficult to get dirty.

  The present invention is not limited to the above embodiment, and can be implemented in various forms within the scope of the gist of the present invention. An automobile is suitable as a vehicle to which the wheel structure of the present invention is applied, but it does not depend on the vehicle form. Further, the wheel structure of the present invention can be applied to any wheel of the vehicle.

  In the above embodiment, the through hole 16c is provided in the rectifying cover 16 as the outer member in order to improve the escape of air. However, the present invention can be implemented without providing such a through hole 16c. is there. Further, the combination of the flat portion 16a and the retreating portion 16b is not essential, and the rectifying cover 16 may be configured linearly.

  Further, the inner surface of the rectifying cover 16 facing the brake disk 11 may be smooth as shown in FIG. 2, but as shown in FIG. 3, a protrusion 20 that protrudes on the side facing the brake disk 11 is provided. Also good. The protrusion 20 is configured in a ring shape so as to make a round along the circumferential direction of the rectifying cover 16. By these protrusions 20, the air guided to the outer surface 11 b side of the brake disk 11 is disturbed by the protrusions 20. Thereby, the vortex E can be generated between the brake disk 11 and the rectifying cover 16. The number of the protrusions 20 is arbitrary and may be one or more. Moreover, the form of the protrusion 20 shown in FIG. 3 is only an example, and may be realized in various forms.

The figure which showed the right front-wheel part of the vehicle to which the wheel structure which concerns on one form of this invention was applied. The figure which showed the state which looked at the inside of the right front wheel part of FIG. 1 from the direction of arrow II. The figure which showed the modification of the form shown in FIG.1 and FIG.2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wheel structure 2 Tire wheel 5 Tire 8 Wheel disk 8a Opening part 11 Brake disk 15 Air scoop (inner member)
16 Rectification cover (outer member)
16a Flat part 16b Retreat part 16c Through-hole 20 Projection

Claims (4)

A wheel structure applied to a vehicle,
A wheel disk having an opening formed therein, a tire wheel on which a tire is mounted, a brake disk that rotates integrally with the tire wheel, and an inner side in the vehicle width direction of the vehicle facing the brake disk An inner member extending so as to incline in the vehicle width direction toward the front of the vehicle, and an outer member disposed between the wheel disc and the brake disc and extending so as to cover the brake disc. A wheel structure characterized by comprising.   The wheel structure according to claim 1, wherein the outer member is provided with a through hole at a position biased toward a rotation center side of the brake disk.   The outer member includes a flat portion extending parallel to the brake disc, and a retreating portion that retreats outward in the vehicle width direction of the vehicle following the flat portion, and the flat portion and the retreating portion The wheel structure according to claim 2, wherein the through hole is located at a boundary.   The wheel structure according to claim 1, wherein the outer member is provided with a protrusion that protrudes to a side facing the brake disc.

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