Brake dust cover

Abstract

The present invention provides a brake dust cover that minimizes water ingress into the hub bearing while ensuring a ventilation channel to the brake system. [Solution] The brake dust cover 10 is fixed to a knuckle connected to a hub bearing, and comprises an inner circumference portion 12 located on the outer circumference side of the hub bearing, and a groove portion 16 formed on the inner circumference portion 12 so as to protrude in the axial direction. The groove portion 16 is molded integrally with the inner circumference portion 12. The groove portion 16 is located at least above the hub bearing and is formed over more than half the circumference when viewed in the axial direction.

Description

Technical Field

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

Background Art

[0002] Patent Document 1 discloses a wheel support structure including a hub bearing that rotatably supports a wheel, a knuckle having a shaft hole into which a part of the hub bearing is inserted, a first mating surface formed around the shaft hole, a plate sandwiched between the hub bearing and the knuckle and abutting against the first mating surface, and a dust cover fixed to the knuckle.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technique described in Patent Document 1, although the amount of water intrusion into the hub bearing side is suppressed by providing a plate, the gap inside the dust cover is narrowed and the air flow path is reduced.

[0005] An object of the present invention is to provide a brake dust cover that secures a ventilation flow path to the brake device side while suppressing the amount of water intrusion into the hub bearing side.

Means for Solving the Problems

[0006] To solve the above problems, an aspect of the present invention is a brake dust cover fixed to a knuckle connected to a hub bearing, the brake dust cover including an inner peripheral portion located on the outer peripheral side of the hub bearing and a groove portion formed in the inner peripheral portion so as to project in the axle direction.

Effects of the Invention

[0007] According to the present invention, it is possible to provide a brake dust cover that suppresses the amount of water entering the hub bearing side while ensuring a ventilation passage to the brake device side. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view of the brake dust cover in the embodiment. [Figure 2] Figure 2A is a side view of the brake dust cover of the embodiment, and Figure 2B is a front view of the brake dust cover of the embodiment. [Figure 3] This is a cross-sectional view of the brake dust cover when it is attached to the knuckle. [Figure 4] This is a perspective cross-sectional view of the brake dust cover when it is attached to the knuckle. [Modes for carrying out the invention]

[0009] Figure 1 is a perspective view of the brake dust cover 10 of the embodiment. Figure 2A is a side view of the brake dust cover 10 of the embodiment, and Figure 2B is a front view of the brake dust cover 10 of the embodiment.

[0010] The brake dust cover 10 is fixed to the knuckle and is located on the outer circumference of the hub bearing. The brake dust cover 10 is formed from a plate material in a roughly C-shape. The brake dust cover 10 is formed circumferentially with respect to the axle. The brake dust cover 10 is located between the knuckle and the wheel and prevents mud, pebbles, etc. from flying from the wheel side towards the vehicle body when the vehicle is in motion.

[0011] The brake dust cover 10 comprises an inner circumference portion 12, an outer circumference portion 14, a gutter portion 16, a first fixing portion 18a, a second fixing portion 18b, a third fixing portion 18c (referred to as "fixing portion 18" when not distinguished), and a base portion 20.

[0012] The base portion 20 is flat and extends in an arc shape. The inner circumference portion 12 is connected to the inner circumference of the base portion 20 and is located radially inward from the base portion 20. The inner circumference portion 12 has an edge portion 12a that is bent and formed in a flange shape on the inner circumference of the brake dust cover 10. The outer circumference portion 14 is bent from the outer circumference of the base portion 20 and extends in the axle direction and is formed in a flange shape.

[0013] The fixing portion 18 is formed in the inner circumference portion 12 and has fastening holes for fixing to the knuckle. Multiple fixing portions 18 are spaced apart in the circumferential direction. The first fixing portion 18a has a flat fixing surface 22. The fixing surface 22 is offset from the base portion 20 in the axle direction and is located closer to the knuckle than the base portion 20.

[0014] The gutter portion 16 is formed on the inner circumference portion 12 so as to protrude from the base portion 20 in the axle direction. The gutter portion 16 is integrally molded with the inner circumference portion 12 from a single metal sheet. This reduces the manufacturing cost of the brake dust cover 10.

[0015] As shown in Figure 2B, the trough 16 is formed over more than half the circumference between the first end 16a and the second end 16b when viewed in the axle direction. The trough 16 is located at least above the axle center C. This configuration allows water that falls into the trough 16 to flow down the trough 16 while avoiding the axle center C, thereby reducing the amount of water that enters the hub bearing side.

[0016] The fixing portion 18 is located radially inward of the trough portion 16, formed on the inner circumference portion 12, and fixed to the knuckle. The trough portion 16 extends above the first fixing portion 18a. This makes it easier for some of the water that falls into the trough portion 16 to flow towards the knuckle.

[0017] FIG. 3 is a cross-sectional view of the brake dust cover 10 attached to the knuckle 24. The brake dust cover 10, the knuckle 24, and the hub bearing 26 constitute a wheel support structure. The hub bearing 26 rotatably supports the wheel and is connected to the knuckle 24. A brake disk or the like is disposed around the hub bearing 26. The brake dust cover 10 is positioned between the knuckle 24 and the brake disk.

[0018] The knuckle 24 connects the hub bearing 26 and each arm connected to the vehicle body. The inner peripheral portion 12 is located on the outer peripheral side of the hub bearing 26. The outer peripheral portion 14 and the gutter portion 16 extend in the axle direction D and cover the fastening portion 28 of the hub bearing 26 to the knuckle 24 from above.

[0019] The gutter portion 16 projects from the base portion 20 toward the knuckle 24 side and is inclined so as to droop toward the knuckle 24 side. The inclination angle θ of the gutter portion 16 with respect to the axle direction D is set in a range of, for example, 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 gutter portion 16 in the axle direction D.

[0020] The gutter portion 16 projects so as to cover the fastening portion 28 of the hub bearing 26, but is located farther away from the fastening portion 28. Thereby, a ventilation flow path to the brake device side is sufficiently secured, and a cooling effect can be ensured.

[0021] FIG. 4 is a perspective cross-sectional view of the brake dust cover 10 attached to the knuckle 24. As shown by the arrow, when water falls onto the gutter portion 16, it flows along the gutter portion 16 so as to avoid the hub bearing 26. Thereby, it is possible to suppress the intrusion of muddy water or the like into the inside of the hub bearing 26. Since a sufficient gap is secured between the inner peripheral portion 12 and the fastening portion 28, the brake device can be configured not to reduce the cooling effect even when the gutter portion 16 is provided.

[0022] As described above, the present disclosure has been explained based on the embodiments. The present disclosure is not limited to the above-described embodiments, and it is also possible to make various modifications such as design changes based on the knowledge of those skilled in the art.

[0023] Although the gutter portion 16 has been shown as being integrally formed from a single metal plate material with the inner peripheral portion 12 and the base portion 20, it is not limited to this mode. For example, the gutter portion 16 may be fixed to the inner peripheral portion 12 by welding and formed like a roof.

Description of Reference Numerals

[0024] 10 Brake dust cover, 12 Inner peripheral portion, 12a Edge portion, 14 Outer peripheral portion, 16 Gutter portion, 16a First end portion, 16b Second end portion, 18a First fixing portion, 18b Second fixing portion, 18c Third fixing portion, 20 Base portion, 22 Fixing surface, 24 Knuckle, 26 Hub bearing, 28 Fastening portion.

Claims

1. A brake dust cover that is fixed to a knuckle connected to a hub bearing, The inner circumference portion located on the outer circumference side of the hub bearing, A brake dust cover characterized by comprising a gutter portion formed on the inner circumference so as to protrude in the axle direction.

2. The brake dust cover according to claim 1, characterized in that the gutter portion is molded integrally with the inner circumference portion.

3. The brake dust cover according to claim 1 or 2, characterized in that the groove portion is located at least above the hub bearing and extends over half a turn or more when viewed in the axial direction.

4. The brake dust cover according to claim 1 or 2, further comprising a fixing portion located radially inward of the gutter portion and fixed to the knuckle.

5. The brake dust cover according to claim 1 or 2, characterized in that it has an outer peripheral portion extending in the axle direction on its outer edge.

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