JP2004353797A - Dust cover structure of disk brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide dust cover structure of a disc brake for discharging dust preventing accumulation of the dust or the like. <P>SOLUTION: A flange joint 1 has a body part 11, arm parts 12 holding caliper (not shown), and three female screw holes 14 for mounting. A dust cover 2 has a center hole 21, mounting holes 23 corresponding to the female screw holes 14, two discharge ports 24, and cutout parts 25 for an ABS for a sensor 49. Assembly of the flange joint 1 with the arm parts 12 of the flange joint 1 forms clearances 51 therebetween. The dust or water in the clearances 51 is discharged through the discharge ports 24 of the dust cover 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disc brake dust cover structure in a vehicle equipped with a disc brake.
[0002]
[Prior art]
The disc brake is a technique in which a disc called a disc rotor is sandwiched between brake pads from both sides to obtain a braking force. A dust cover is attached adjacent to the disk rotor to protect the disk rotor from flying stones and water. Such a dust cover is usually attached to a knuckle or a joint flange (see Reference 1).
[0003]
[Patent Document 1]
JP-A-9-272417
[Problems to be solved by the invention]
However, if there is a gap in a complicated place between the dust cover and the joint flange, there is a possibility that dust, water, or the like may enter the gap and accumulate. As a result, rust may be generated on the dust cover and the joint flange, and the function of the dust cover, such as a decrease in strength, may be reduced, or a defect in appearance may occur.
The present invention has been made in view of such a situation, and an object of the present invention is to provide a dust cover structure of a disc brake capable of discharging dust and the like without being accumulated.
[0005]
[Means for Solving the Problems]
The present invention includes a disk rotor of a disk brake provided on an axle shaft side, and an arm structure component having a main body portion and an arm portion protruding radially outward from the main body portion on the axle case side, In a disc brake dust cover structure in which a caliper straddling a disc rotor is held and a dust cover is attached to an axle case side between the disc rotor and the arm structure component, the dust cover and the arm portion of the arm structure component A hole is provided in a portion of the dust cover adjacent to the gap, and dust and the like in the gap are discharged through the hole.
The arm is thinned so that the gap is large. The arm structure component is a flange joint.
[0006]
An axle shaft side is provided with a disk rotor of a disk brake, and an axle case side is provided with an arm structure component having a main body and an arm projecting radially outward from the main body. The arm straddles the disk rotor. In a disc brake dust cover structure in which a caliper is held and a dust cover is attached to the axle case side between the disc rotor and the arm structural part, a shoulder is provided on the disc rotor side of the main body of the arm structural part. Providing an engagement hole in the dust cover corresponding to the shoulder, engaging the engagement hole with a shoulder of the main body, attaching the dust cover to the main body of the arm structure component, An ABS sensor is provided on the disk rotor side of the main body of the arm structure part, and the dust cover is provided on the dust cover in accordance with the position of the ABS sensor. A notch portion larger than the notch portion is provided continuously to the engagement hole, a gap is provided between the dust cover and the arm portion of the arm structure component, and the notch portion is provided in a portion of the dust cover adjacent to the gap. A continuous opening is provided in the notch, and dust and the like in the gap are discharged through the opening.
In the dust cover, the outermost position in the outer diameter direction of the opening is closer to the center than the outermost position in the outer diameter direction of the notch. The arm structure component is a flange joint.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a dust cover structure for a disc brake according to the present invention will be described with reference to the drawings.
FIG. 1 shows a case where the present invention is applied to a rear wheel. An outline of the structure near the rear wheel is that an axle case 43 extending in the vehicle width direction is connected to a body 41 via a rear suspension 42. Axle shafts 44 are attached to both ends of the axle case 43, respectively. The outer end of the axle shaft 44 is connected to a hub 46 via a wheel bearing 45, and a cast iron disk rotor 47 and a tire wheel 48 are assembled to the hub 46. The flange joint 1 is assembled to the axle shaft 44 adjacent to the hub 46. A dust cover 2 is attached to the flange joint 1.
[0008]
As shown in FIG. 3 or FIG. 4, the flange joint 1 includes a cylindrical main body 11 and an arm 12 protruding radially outward from the main body 11. In the flange joint 1, a portion where strength is possible in the arm portion 12 is lightened to reduce the weight. Specifically, the disk rotor 47 side of the arm 12 is lightened, and the thickness of the arm 12 is reduced. Reference numeral 12a indicates a portion that has been lightened. The arm 12 is provided with a bifurcated caliper (not shown) that straddles the disk rotor 47 from both sides. The caliper holds a pad (not shown) that slides on the disk rotor 47 and performs a braking action. A shoulder 13 is formed on the end face of the main body 11 on the disk rotor 47 side, and three female screw holes 14 are formed at equal distances from the center and at equal intervals. Two recesses 15 are also formed, and one of the recesses 15 is post-processed with a high degree of accuracy and penetrated, and serves as a sensor hole 15a for mounting an ABS sensor 49 (see FIG. 2). . The other recess 15 is not processed at all and remains unpenetrated.
Here, the ABS sensor 49 is a sensor for detecting the lock of the tire, and one ABS sensor 49 is attached to the flange joint 1 on the disk rotor 47 side as shown in FIG. The reason why there are two recesses 15 for the ABS sensor 49 is to make parts for the left wheel and the right wheel common. More specifically, the ABS prevents the tire from being locked during braking, so that the driver can avoid danger by operating the steering wheel. In other words, check whether the tires are turning when the brakes are applied, and when the tires lock, immediately release the brakes to restore the tire rotation, and always keep the slip ratio within a certain range so that the maximum frictional force can be obtained. It is made to be.
[0009]
As shown in FIG. 3 or FIG. 5, the dust cover 2 is a substantially disk-shaped plate member whose peripheral edge is bent in one direction, and has a center hole 21 (engaging hole), a caliper escape portion 22 and At the peripheral portion of the center hole 21, three mounting holes 23 corresponding to the positions of the female screw holes 14 of the flange joint 1 and two discharge holes 24 are provided. The center hole 21 is engageable with the shoulder 13 of the flange joint 1. The caliper escape portion 22 is for preventing interference with a caliper (not shown) attached to the arm portion 12, and is formed at an edge portion. Two notches 25 are formed in continuation of the center hole 21 to prevent interference with the ABS sensor 49 attached to the flange joint 1. The two discharge holes 24 are positioned so as to sandwich the notch 25.
[0010]
Next, a procedure for assembling the dust cover 2 to the flange joint 1 will be described. The center hole 21 of the dust cover 2 is engaged with the shoulder 13 of the main body 11 of the flange joint 1 from the outside of the vehicle, and three bolts 50 are inserted through the respective mounting holes 23 of the dust cover 2 into the respective female screw holes of the flange joint 1. 14 and tighten. As described above, since the arm portion 11 of the flange joint 1 is lightened, there is a relatively large gap 51 between the dust cover 2 and the arm portion 12 of the flange joint 1 in an assembled state. The gap 51 is located between the dust cover 2 and the flange joint 1, but since the discharge hole 24 of the dust cover 2 communicates with the gap 51, the gap 51 does not become a dead end, and dust, water, etc. The possibility that rust or the like is generated is reduced without accumulating even if infiltration occurs. Further, since the gap 51 is relatively large, dust, water, and the like can be efficiently discharged.
[0011]
In the present embodiment, as shown in FIG. 5, the discharge hole 24 is provided separately from the center hole 21 in the dust cover 2, but the present invention is not limited to this. In addition, an opening 34 continuous with the center hole 31 or the notch 35 may be provided. An opening 35 is provided instead of the discharge hole 24. With such a configuration, the configuration of the press die can be simplified, and the life of the press die can be increased.
In this case, the outermost position in the outer diameter direction of the opening can be closer to the center than the outermost position in the outer diameter direction of the notch. Thus, the configuration can be made without affecting the shape of the entire dust cover.
The dust cover 3 in FIG. 6 is provided with a center hole 31, a caliper escape portion 32, a mounting hole 33, and a cutout portion 35, similarly to the dust cover 2.
[0012]
【The invention's effect】
The present invention includes a disk rotor of a disk brake provided on an axle shaft side, and an arm structure component having a main body portion and an arm portion protruding radially outward from the main body portion on the axle case side, In a disc brake dust cover structure in which a caliper straddling a disc rotor is held and a dust cover is attached to an axle case side between the disc rotor and the arm structure component, the dust cover and the arm portion of the arm structure component A hole is provided in the dust cover adjacent to the gap, and dust and the like in the gap are discharged through the hole. Can be prevented from occurring.
If the arm is thinned so that the gap becomes large, dust, water, and the like in the gap can be efficiently discharged.
[0013]
An axle shaft side is provided with a disk rotor of a disk brake, and an axle case side is provided with an arm structure component having a main body and an arm projecting radially outward from the main body. The arm straddles the disk rotor. In a disc brake dust cover structure in which a caliper is held and a dust cover is attached to the axle case side between the disc rotor and the arm structural part, a shoulder is provided on the disc rotor side of the main body of the arm structural part. Providing an engagement hole in the dust cover corresponding to the shoulder, engaging the engagement hole with a shoulder of the main body, attaching the dust cover to the main body of the arm structure component, An ABS sensor is provided on the disk rotor side of the main body of the arm structure part, and the dust cover is provided on the dust cover in accordance with the position of the ABS sensor. A notch portion larger than the notch is provided continuously with the engagement hole, a gap is provided between the dust cover and the arm portion of the arm structure component, and the notch portion is provided in a portion of the dust cover adjacent to the gap. Since a continuous opening is provided in the notch and dust and the like in the gap are discharged through the opening, the configuration of the press die can be simplified, and the life of the press die can be increased. In addition, dust and water do not accumulate in the gap, and the generation of rust and the like can be prevented.
In the dust cover, when the outermost position in the outer diameter direction of the opening is closer to the center than the outermost position in the outer diameter direction of the cutout portion, the outer cover is configured without affecting the shape of the entire dust cover. can do.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view showing the vicinity of a rear wheel of a vehicle to which a disc brake dust cover structure according to an embodiment of the present invention is applied.
FIG. 2 is a perspective view of the rear wheel shown in FIG. 1 with a hub and wheel bearings removed.
FIG. 3 is a longitudinal sectional view of the rear wheel shown in FIG. 2 with an axle removed.
FIG. 4 is a front view of the flange joint shown in FIG. 3;
FIG. 5 is a front view of the dust cover shown in FIG. 3;
FIG. 6 is a front view of a dust cover according to a modified example.
[Explanation of symbols]
1 Flange joint (arm structure parts)
DESCRIPTION OF SYMBOLS 11 Main body part 12 Arm part 13 Shoulder part 14 Female screw hole 15 Sensor hole 2 Dust cover 21, 31 Center hole 22, 32 Caliper escape part 23, 33 Mounting hole 24 Discharge hole 25, 35 Notch part 3 Dust cover 34 Opening 41 Body 42 Rear suspension 43 Axle case 44 Axle shaft 45 Wheel bearing 46 Hub 47 Disk rotor 48 Tire wheel 49 ABS sensor 50 Bolt 51 Clearance

Claims (5)

An axle shaft side is provided with a disk rotor of a disk brake, and an axle case side is provided with an arm structure component having a main body and an arm projecting radially outward from the main body. The arm straddles the disk rotor. In a disc brake dust cover structure in which a caliper is held and a dust cover is attached to the axle case side between the disc rotor and the arm structure component, a gap is provided between the dust cover and the arm portion of the arm structure component. A dust cover structure provided with a hole in a portion of the dust cover adjacent to the gap, and discharging dust and the like in the gap through the hole. 2. The disc cover dust cover structure according to claim 1, wherein said arm portion is thinned so as to increase said gap. An axle shaft side is provided with a disk rotor of a disk brake, and an axle case side is provided with an arm structure component having a main body and an arm projecting radially outward from the main body. The arm straddles the disk rotor. In a dust cover structure of a disc brake in which a caliper is held and a dust cover is attached to an axle case side between the disc rotor and the arm structural component,
A shoulder is provided on the disk rotor side of the main body of the arm structure component, an engagement hole is provided in the dust cover corresponding to the shoulder, and the engagement hole is engaged with the shoulder of the main body. Attach the dust cover to the body of the arm structure part,
An ABS sensor is provided on the disk rotor side of the main body of the arm structure component, and a notch larger than the outer diameter of the ABS sensor is engaged with the dust cover corresponding to the position of the ABS sensor. Provided continuously in the hole,
A gap is provided between the dust cover and the arm of the arm structure component, and an opening is provided in the portion of the dust cover adjacent to the gap, the opening being continuous with the notch. A dust cover structure for a disc brake, which discharges dust and the like. The dust cover according to claim 3, wherein the outermost position of the opening in the outer diameter direction is closer to the center than the outermost position of the notch in the outer diameter direction. Construction. The dust cover structure for a disc brake according to claim 1 or 3, wherein the arm structure component is a flange joint.

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