Brake dust cover

Abstract

This invention provides a brake dust cover that suppresses water intrusion towards the wheel hub bearing while ensuring ventilation to the brake system. The brake dust cover is fixed to a steering knuckle connected to the wheel hub bearing. The brake dust cover includes: an inner circumferential portion located on the outer circumferential side of the wheel hub bearing; and a groove formed in the inner circumferential portion protruding in the axle direction. The groove is integrally formed with the inner circumferential portion. The groove is located at least above the wheel hub bearing and extends more than half the circumference when viewed in the axle direction.

Description

Technical Field

[0001] The present invention relates to a brake dust cover disposed around a wheel hub bearing. Background Technology

[0002] Patent Document 1 discloses a wheel support structure comprising: a hub bearing for rotatably supporting a wheel; an axle hole for inserting a portion of the hub bearing; a steering knuckle having a first mating surface formed around the axle hole; a plate sandwiched between the hub bearing and the steering knuckle and abutting against the first mating surface; and a dust cover fixed to the steering knuckle.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2017-114274 Summary of the Invention

[0004] In the technology described in Patent Document 1, a plate is set to suppress the amount of water intrusion to the hub bearing side, but the gap inside the dust cover becomes narrower, resulting in a smaller airflow path.

[0005] The purpose of this invention is to provide a brake dust cover that suppresses the amount of water intrusion into the wheel hub bearing side while ensuring ventilation flow to the brake device side.

[0006] To address the aforementioned issues, one aspect of the present invention is a brake dust cover fixed to a steering knuckle connected to a wheel hub bearing. The brake dust cover includes: an inner peripheral portion located on the outer peripheral side of the wheel hub bearing; and a groove formed in the inner peripheral portion in a manner that protrudes along the axle direction.

[0007] Invention Effects

[0008] According to the present invention, a brake dust cover can be provided that suppresses the amount of water intrusion to the hub bearing side while ensuring ventilation flow to the brake device side. Attached Figure Description

[0009] Figure 1 This is a perspective view of the brake dust cover of an embodiment.

[0010] Figure 2 (A) is a side view of the brake dust cover of the embodiment. Figure 2 (B) is a front view of the brake dust cover of the embodiment.

[0011] Figure 3 This is a cross-sectional view of the brake dust cover installed on the steering knuckle.

[0012] Figure 4 This is a three-dimensional sectional view of the brake dust cover installed on the steering knuckle. Detailed Implementation

[0013] Figure 1 This is a perspective view of the brake dust cover 10 according to an embodiment. Furthermore, Figure 2 (A) is a side view of the brake dust cover 10 of the embodiment. Figure 2 (B) is a front view of the brake dust cover 10 of the embodiment.

[0014] The brake dust cover 10 is fixed to the steering knuckle and located on the outer periphery of the wheel hub bearing. The brake dust cover 10 is formed from a sheet metal in a roughly C-shape. The brake dust cover 10 is formed circumferentially relative to the axle direction. The brake dust cover 10 is located between the steering knuckle and the wheel, preventing mud, small stones, etc., from flying from the wheel side to the vehicle body side when the vehicle is in motion.

[0015] The brake dust cover 10 includes an inner peripheral portion 12, an outer peripheral portion 14, a groove portion 16, a first fixing portion 18a, a second fixing portion 18b, a third fixing portion 18c (hereinafter referred to as "fixing portion 18" without distinguishing between them) and a base portion 20.

[0016] The base 20 is flat and extends into an arc shape. The inner peripheral portion 12 is continuous with the inner peripheral edge of the base 20 and is located further radially inward than the base 20. The inner peripheral portion 12 has an edge portion 12a that is curved along the inner peripheral edge of the brake dust cover 10 and formed into a flange shape. The outer peripheral portion 14 is curved from the outer peripheral edge of the base 20 and extends toward the axle direction, forming a flange shape.

[0017] A fixing part 18 is formed in the inner peripheral portion 12 and has a fastening hole for fixing to the steering knuckle. Multiple fixing parts 18 are arranged separately in the circumferential direction. The first fixing part 18a has a flat fixing surface 22. The fixing surface 22 is located offset from the base 20 in the axle direction and is located closer to the steering knuckle side than the base 20.

[0018] The groove 16 is formed in the inner periphery 12 in such a way that it protrudes from the base 20 toward the axle. The groove 16 is integrally formed from a single sheet metal and the inner periphery 12. This reduces the manufacturing cost of the brake dust cover 10.

[0019] like Figure 2 As shown in (B), the groove 16, when viewed in the axle direction, is formed covering more than half a circumference between the first end 16a and the second end 16b. The groove 16 is located at least above the axle center C. Thus, it can be configured such that water falling into the groove 16 avoids the axle center C and falls along the groove 16, thereby suppressing the amount of water intruding towards the wheel hub bearing side.

[0020] The fixing part 18 is located radially inside the groove 16, formed in the inner peripheral portion 12, and fixed to the steering knuckle. The groove 16 extends above the first fixing part 18a. As a result, a portion of the water that falls into the groove 16 can easily flow towards the steering knuckle side.

[0021] Figure 3 This is a cross-sectional view of the brake dust cover 10 installed on the steering knuckle 24. The brake dust cover 10, steering knuckle 24, and wheel bearing 26 constitute the wheel support structure. The wheel bearing 26 rotatably supports the wheel and is connected to the steering knuckle 24. A brake disc or the like is arranged around the wheel bearing 26. The brake dust cover 10 is located between the steering knuckle 24 and the brake disc.

[0022] The steering knuckle 24 connects the wheel hub bearing 26 and the arms connected to the vehicle body. The inner peripheral portion 12 is located on the outer peripheral side of the wheel hub bearing 26. The outer peripheral portion 14 and the groove portion 16 extend in the axle direction D and cover the fastening portion 28 of the wheel hub bearing 26 to the steering knuckle 24.

[0023] The groove 16 protrudes from the base 20 along the steering knuckle 24 side and is inclined downward toward the steering knuckle 24 side. The inclination angle θ of the groove 16 relative to the axle direction D is, for example, set in the range of 10 degrees to 25 degrees. The width of the outer peripheral portion 14 located on the upper side in the axle direction D is larger than the width of the groove 16 in the axle direction D.

[0024] The groove 16 protrudes to cover the fastening part 28 of the hub bearing 26, but is located further away from the fastening part 28. This ensures sufficient ventilation flow to the brake device side, thereby ensuring cooling effect.

[0025] Figure 4 This is a perspective cross-sectional view of the brake dust cover 10 installed on the steering knuckle 24. As indicated by the arrow, if water falls into the groove 16, it flows along the groove 16 to avoid the wheel hub bearing 26. This prevents mud and water from entering the interior of the wheel hub bearing 26. Because a sufficient clearance is ensured between the inner circumference 12 and the fastening part 28, even with the groove 16 provided, the cooling effect of the brake device can be maintained.

[0026] The present invention has been described above with reference to the embodiments. The present invention is not limited to the above embodiments, and various design changes and modifications can be made based on the knowledge of those skilled in the art.

[0027] The groove 16 is shown as being integrally formed from the inner periphery 12, the base 20, and a sheet metal, but is not limited to this method. For example, the groove 16 can be fixed to the inner periphery 12 by welding and can be formed into a roof shape.

[0028] Symbol Explanation

[0029] 10-Brake dust cover, 12-Inner circumference, 12a-Edge, 14-Outer circumference, 16-Groove, 16a-First end, 16b-Second end, 18a-First fixing part, 18b-Second fixing part, 18c-Third fixing part, 20-Base, 22-Fixing surface, 24-Steering knuckle, 26-Wheel hub bearing, 28-Fastening part.

Claims

1. A brake dust cover, fixed to a steering knuckle connected to a wheel hub bearing, characterized in that it comprises: The inner circumferential portion, which is located on the outer circumferential side of the hub bearing; and A groove is formed in the inner periphery in a manner that protrudes along the axle direction.

2. The brake dust cover according to claim 1, characterized in that, The groove is integrally formed with the inner peripheral portion.

3. The brake dust cover according to claim 1 or 2, characterized in that, The groove is located at least above the wheel hub bearing and is formed covering more than half a circumference when viewed in the axle direction.

4. The brake dust cover according to claim 1 or 2, characterized in that, It also has: A fixing part is located radially inside the groove and fixed to the steering knuckle.

5. The brake dust cover according to claim 1 or 2, characterized in that, have: The outer periphery extends outward along the axle direction.

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