JP2007147026A - Dust cover for disc rotor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dust cover for disc rotor, capable of discharging mud or others deposited on the inside of a disc wheel. <P>SOLUTION: The dust cover 10 is fixed to the disc rotor 38 rotatable together with the disc wheel 20 at a position adjacent to the inside in the cross direction of a vehicle in the state of not being rotated together with the disc rotor 38. It has a flange portion formed at the peripheral edge. A mud discharge plate 12 protruded from the flange portion to the inner peripheral face of the disc wheel 20 is provided for discharging deposited materials on the inner peripheral face of the disc wheel 20 to the inside in the cross direction of the vehicle with the rotation of the disc wheel 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dust cover for a disc rotor of a disc brake that applies a braking force to a vehicle.

  2. Description of the Related Art Conventionally, there is known a dust cover attached adjacent to a disk rotor in order to protect the disk rotor of the disk brake from flying stones, water, or the like (see, for example, Patent Document 1). The dust cover is provided with a hole, and dust accumulated in a gap between the dust cover and the joint flange is discharged through the hole.

In addition, it is also known that a slope portion continuous with a dust cover is provided close to a tire wheel in order to prevent intrusion of muddy water or the like into the brake drum (see, for example, Patent Document 2). Alternatively, it has a wheel-side brake drum and a wheel-side mudguard, which is a circumferential web in an annular recess at the end of the brake drum facing the mudguard to provide a maze-type seal A brake device that is engaged in a non-contact manner is also known (see, for example, Patent Document 3).
JP 2004-353797 A Japanese Utility Model Publication No. 1-85538 JP 2001-524646 A

  As described above, a dust cover is conventionally provided to protect the disk rotor. However, due to long-term use or the like, mud or the like may enter the gap between the peripheral edge of the dust cover and the disc wheel and accumulate on the inner peripheral surface of the rim of the disc wheel. It is difficult for such mud and other sediments to be discharged naturally.

  Therefore, an object of the present invention is to provide a disc rotor dust cover that can discharge mud and the like accumulated in the disc wheel.

  In order to solve the above problems, a dust cover for a disc rotor according to an aspect of the present invention is fixed to a disc rotor rotatable with a disc wheel so as not to rotate with the disc rotor at a position adjacent to the inner side in the vehicle width direction. The disc rotor dust cover has a flange portion formed on the inner periphery of the disc wheel so that deposits on the inner peripheral surface of the disc wheel are discharged to the inside in the vehicle width direction as the disc wheel rotates. A deposit discharging member protruding toward the surface is provided.

  According to this aspect, the disk rotor rotates together with the disk wheel when the vehicle travels, while the dust cover is fixed and does not rotate. The dust cover is fixed to a position adjacent to the disc rotor on the inner side in the vehicle width direction, and a flange portion is formed at the peripheral edge portion. From the flange portion, a deposit discharging member is directed toward the inner peripheral surface of the disc wheel so that deposits such as mud on the inner peripheral surface of the disc wheel are discharged inward in the vehicle width direction as the disc wheel rotates. It protrudes. Therefore, deposits such as mud are scraped out by the deposit discharge member when the vehicle is running, and are discharged to the outside of the wheel.

  The disk rotor is a ventilated type disk rotor formed by interposing a plurality of fins between two disks, and the deposit discharge member may be disposed in the gap between the fins and the inner peripheral surface. Good.

  According to this aspect, the deposit discharging member is disposed in the gap between the fin of the ventilated disk rotor and the inner peripheral surface of the disk wheel. For this reason, it can suppress that the mud etc. which accumulated on the internal peripheral surface of a disc wheel penetrate | invade into the ventilation hole between several fins, and can make a ventilation hole hard to clog. As a result, the exhaust heat capability of the ventilated disc rotor is maintained, and early wear of the friction member of the brake can be suppressed.

  The deposit discharge member may include a mud discharge portion that protrudes from the flange portion so as to be inclined such that the outer side in the vehicle width direction is the front and the inner side in the vehicle width direction is the rear as viewed from the rotation direction of the disc wheel.

  In this way, when the disc wheel rotates, deposits on the inner peripheral surface of the disc wheel are easily scraped out inward in the vehicle width direction by the mud discharger.

  According to the present invention, it is possible to discharge mud and the like accumulated inside the disc wheel.

  Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic cross-sectional view showing a dust cover 10 for a disk rotor according to the present embodiment and the structure around it. FIG. 1 shows a schematic sectional view of a wheel by a vertical plane including an axle, and shows a case where a dust cover 10 according to the present invention is applied to a driven wheel as an example. The dust cover 10 is disposed at a position adjacent to the inner side in the vehicle width direction of the disk rotor 38 in order to protect the disk rotor 38 from mud, flying stones, water, and the like.

  As shown in FIG. 1, the disc wheel 20 includes a disc portion 23 having a design surface exposed toward the outer side in the vehicle width direction, and a rim 24 for holding the tire 22. The dust cover 10 and the disc rotor 38 are disposed and accommodated in a wheel internal space 42 defined by the disc portion 23 and the rim 24 along a plane perpendicular to the axle.

  A central portion of the disk portion 23 is fixed to the hub 32 by a plurality of bolts 36. The hub 32 is assembled to the axle shaft 26 via a bearing 34, and the hub 32 and the disc wheel 20 are rotatable about the axle shaft 26 as a rotation axis.

  A disc rotor 38 of a disc brake is interposed between the disc portion 23 of the disc wheel 20 and the hub 32. The disc rotor 38 is also fixed to the disc portion 23 and the hub 32 with bolts 36. For this reason, the disc rotor 38 can rotate together with the disc wheel 20. The disc brake of this embodiment includes a caliper (not shown) in addition to the disc rotor 38. When the brake fluid is supplied to the caliper, the disc rotor 38 is pressed and a frictional force is generated. As a result, braking force is applied to the wheels.

  In this embodiment, the disc rotor 38 is configured as a ventilated disc rotor 38 including two opposing brake discs 39 and a plurality of fins 40 interposed and fixed between the brake discs 39. Has been. The plurality of fins 40 are arranged radially, and a radial air hole is formed between the two brake disks 39 by these fins 40. By forming a vent hole between the opposing brake disks 39 in this way, air is released from the vent hole by centrifugal force when the brake disk 39 rotates, and the disk rotor 38 can be cooled. The present invention can also be applied to a disc brake or the like having a solid type disc rotor.

  A dust cover fixing portion 28 fixed coaxially to the axle shaft 26 is provided on the inner side in the vehicle width direction than the hub 32. The dust cover 10 is fixed to the outer periphery of the dust cover fixing portion 28 with a plurality of bolts 30. Specifically, the dust cover 10 has a substantially disk shape having an opening at the center, and the vicinity of the opening is fixed to the outer peripheral portion of the dust cover fixing portion 28 by a plurality of bolts 30. . The dust cover 10 is fixed to the dust cover fixing portion 28 with a gap between the dust cover 10 and the disk rotor 38 at a position adjacent to the disk rotor 38 on the inner side in the vehicle width direction. For this reason, even if the disk rotor 38 rotates with the disk wheel 20, the dust cover 10 does not rotate.

  A mud discharge plate 12 as a deposit discharge member is provided at the peripheral edge of the dust cover 10. With reference to FIG. 2, the peripheral part of the dust cover 10 is demonstrated in detail. FIG. 2 is a schematic cross-sectional view showing the peripheral edge of the dust cover 10.

  As shown in FIG. 2, a flange portion 11 is formed around the entire periphery of the dust cover 10. The flange portion 11 includes a first flange 16 and a second flange 17. The flange portion 11 is provided to increase the rigidity of the dust cover 10. The first flange 16 is formed by bending the peripheral edge of the dust cover 10 outward in the vehicle width direction. The second flange 17 is formed by being bent further inward in the vehicle width direction from the first flange 16 in the vicinity of the outer peripheral portion of the brake disc 39 on the inner side in the vehicle width direction. This is to reduce the influence on the cooling performance of the disk rotor 38.

  A plate fixing portion 13 is provided so as to extend further outward in the vehicle width direction from the first flange 16. The plate fixing portion 13 is disposed in the vicinity of the outer peripheral portion of the disc rotor 38 in the gap between the inner peripheral surface of the rim 24 of the disc wheel 20 and the fin 40 of the disc rotor 38. The mud discharge plate 12 is fixed to the plate fixing portion 13 so as to protrude from the plate fixing portion 13 toward the inner peripheral surface of the rim 24. For this reason, the mud discharge plate 12 is also disposed in the gap between the inner peripheral surface of the rim 24 and the fin 40 similarly to the plate fixing portion 13. It is preferable to reduce the distance between the tip of the mud discharge plate 12 and the inner peripheral surface of the rim 24 from the viewpoint of scraping and discharging more deposits.

  The mud discharge plate 12 includes a mud discharge portion 14 and a base portion 15, and the mud discharge portion 14 and the base portion 15 are formed from a single flat plate bent vertically. A base portion 15 of the mud discharge plate 12 is fixed to the plate fixing portion 13.

  In FIG. 1 and FIG. 2, only the lowest mud discharge plate 12 in the vertical direction is shown, but the mud discharge plate 12 and the plate fixing portion 13 are plurally spaced at an appropriate interval from the periphery of the dust cover 10. You may make it provide. For example, 5 to 6 mud discharge plates 12 can be formed in the lower half of the dust cover 10 in the vertical direction, for example, at intervals of 30 degrees.

  As shown in FIG. 2, the tip end portion of the mud discharge plate 12 and the plate fixing portion 13 are inclined with respect to the inner peripheral surface of the rim 24. The plate fixing portion 13 may be parallel to the inner peripheral surface of the rim 24.

  FIG. 3 is a view of the periphery of the dust cover 10 as viewed from the direction of arrow A in FIG. As shown in FIG. 3, a part of the first flange 16 of the dust cover 10 protrudes outward in the vehicle width direction in a rectangular shape to form a plate fixing portion 13. As described above, since the plate fixing portion 13 is formed by projecting a part of the first flange 16, the influence on the cooling performance of the disk rotor 38 due to the provision of the plate fixing portion 13 and the mud discharge plate 12. Can be small.

  The mud discharge plate 12 is attached to the plate fixing portion 13 in a state where the mud discharge plate 12 is inclined by an angle α with respect to the CC plane indicated by a one-dot chain line in FIG. The CC plane is a plane that includes the axle and passes through the plate fixing portion 13. The angle α is, for example, about 30 degrees or less in the present embodiment. The attachment angle α is preferably set as appropriate through experiments or the like according to the shape of the disc rotor 38, the disc wheel 20, and the mud discharge plate 12 to be attached. When the mud discharge plate 12 is attached in an inclined state in this way, the vehicle width direction outer side of the mud discharge plate 12 is on the front (left side in FIG. 3) when viewed from the rotation direction R of the disc wheel 20. The inner side in the width direction is the back (right side in FIG. 3).

  FIG. 4 is a schematic cross-sectional view taken along line BB in FIG. As shown in FIG. 4, the mud discharge plate 12 is a member having an L-shaped cross section in which the mud discharge portion 14 and the base portion 15 are vertical. A base portion 15 of the mud discharge plate 12 is fixed to the plate fixing portion 13 by welding or the like, for example. In addition, when observed from the direction of arrow B in FIG. 2, the mud discharge plate 12 is observed as shown in FIG.

  With the above-described configuration, deposits such as mud in the gap between the inner peripheral surface of the rim 24 of the disc wheel 20 and the disc rotor 38 are discharged while the vehicle is running. A description will be given with reference to FIG. 3 again. It is assumed that the disc wheel 20 rotates in the direction indicated by the arrow R while the vehicle is moving forward. Then, the deposit 44 on the inner peripheral surface of the rim 24 moves in the direction R with the rotation of the disc wheel 20 and collides with the mud discharge plate 12 of the dust cover 10 fixed so as not to rotate. The mud discharge plate 12 is fixed to the plate fixing portion 13 in an inclined state so that the outer side in the vehicle width direction is the front (left side in FIG. 3) and the inner side in the vehicle width direction is the rear side (right side in FIG. 3). The deposit 44 is scraped and discharged inward in the vehicle width direction along the arrow S indicated by a dotted line in the drawing.

  When the vehicle moves backward, the disc wheel 20 rotates in the direction opposite to the direction R, and the deposit 44 can be scraped outward by the mud discharge plate 12. However, in normal vehicle use, the frequency of the vehicle moving backward is much less than the frequency of moving forward. Therefore, if the mud discharge plate 12 is attached so that the deposit 44 is scraped when the vehicle moves forward, the deposit 44 It is thought that it is discharged sufficiently.

  As described above, in the present embodiment, the mud discharge plate 12 is provided on the flange portion 11 of the dust cover 10. Thereby, the deposit on the inner peripheral surface of the rim 24 of the disc wheel 20 is scraped off by the rotation of the disc wheel 20 as the vehicle travels. Therefore, the deposit in the disc wheel 20 can be discharged to the outside.

  In the present embodiment, the mud discharge plate 12 is disposed in the gap between the fins 40 of the ventilated disk rotor 38 and the inner peripheral surface of the disk wheel 20. For this reason, it can suppress that the deposit on the internal peripheral surface of the disc wheel 20 penetrate | invades into the ventilation hole between the fins 40, and can make it difficult to clog a ventilation hole. As a result, it is possible to suppress a reduction in the exhaust heat capacity of the ventilated disc rotor 38.

  In the present embodiment, the mud discharge plate 12 is disposed in the gap between the fin 40 of the disc rotor 38 and the inner peripheral surface of the disc wheel 20, but the brake disc 39 and the disc wheel 20 on the outer side in the vehicle width direction. You may make it arrange | position in the gap | interval with the inner peripheral surface. Even in this case, it is possible to suppress the deposits on the inner peripheral surface of the disc wheel 20 from entering the ventilation holes between the fins 40.

It is a schematic sectional drawing which shows the dust cover for disk rotors concerning this embodiment, and the structure of the periphery. It is a schematic sectional drawing which shows the peripheral part of a dust cover. It is a figure when the peripheral part of a dust cover is seen from the arrow A direction in FIG. It is a schematic sectional drawing about the BB line of FIG.

Explanation of symbols

  10 Dust cover, 11 Flange, 12 Mud discharge plate, 14 Mud discharge, 20 Disc wheel, 38 Disc rotor, 40 Fin.

Claims (3)

A disc rotor dust cover fixed to a disc rotor rotatable along with a disc wheel so as not to rotate together with the disc rotor at a position adjacent to the inner side in the vehicle width direction, and having a flange portion formed at a peripheral portion thereof,
A deposit discharging member protruding from the flange portion toward the inner peripheral surface so as to discharge the deposit on the inner peripheral surface of the disc wheel to the inner side in the vehicle width direction as the disc wheel rotates; A dust cover for disc rotors.   The disk rotor is a ventilated type disk rotor formed by interposing a plurality of fins between two disks, and the deposit discharge member is disposed in a gap between the fins and the inner peripheral surface. The dust cover for a disk rotor according to claim 1, wherein the dust cover is provided.   The deposit discharge member includes a mud discharge portion that protrudes from the flange portion so as to incline so that the outer side in the vehicle width direction is the front side and the inner side in the vehicle width direction is the back side when viewed from the rotation direction of the disc wheel. The dust cover for a disk rotor according to claim 1 or 2.

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