JPH08303498A - Disc brake device - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the wear resistance of a long hole pressed against a pin of a brake pad in a disc brake device. [Structure] The brake pad 10 is composed of a lining 15 that comes into contact with the side surface of the disc and a plate 16 that supports the lining 15. A long hole 17 is formed in the plate 16 so as to be slightly displaced in the rotational direction of the disc with respect to the pin 12, and the pin provided in the brake body is inserted into the long hole 17. Both ends 18b of the spring 18 are placed over the pin 12, and the engaging portion 18a formed at the center is engaged with the lower edge of the brake pad 10, and the lower edge 17a of the long hole 17 and the pin 12 are engaged.
It is urged to press and against each other. The long hole 17
The longitudinal axis of the brake pad 10 is formed so as to be inclined and intersected with the tangential direction of the disc 2 intersecting the center line C of the brake pad 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake device used in automobiles and motorcycles (hereinafter simply referred to as vehicles).

[0002]

2. Description of the Related Art A disc brake device used in a vehicle is generally composed of a brake body 1 fixed to the vehicle body side and a disc 2 fixed to the wheel side. The brake body 1 includes a brake pad 10 and a brake pad 10. A caliper 11 for pressing the brake pad 10 against the disc 2 is provided (see FIG. 1). The brake main body 1 is provided with a pair of pins 12 over the inner surfaces facing each other. Brake pad
The reference numeral 10 is composed of a lining 15 pressed against the disk 2 and a plate 16 for supporting the lining 15. Brake pad 10 is pin 12 on plate 16
Is inserted and is moved close to the surface of the disk 2 by driving the caliper 11 so as to press the lining 15 against the disk 2. The plate 16 through which the pin 12 is inserted is
In order to be able to move closer to the side surface of the disc 2, and when the disc brake device is activated (during braking), the brake pad 10 rotates in the direction of rotation of the disc 2 with respect to the pin 12 (shown by a chain line in FIG. Slot 20 with clearance for pin 12 so that it can be slightly displaced in the direction of the arrow)
Are formed. The symbol O in the figure indicates the center point of the disk 2.

Since the long hole 20 of the plate 16 is inserted into the pin 12 with a clearance, the long hole 20 may generate abnormal noise due to vibration or may come into contact with the pin 12 or the pin 12.
A spring 18 is provided for urging the inserted pin 12 and the elongated hole 20 so as to press the peripheral edges of the pin 12 and the elongated hole 20 against each other so as not to wear or damage the peripheral edge. Both ends 18b of the spring 18 are placed over the pin 12, and the engaging portion 18a formed at the center is engaged with the lower edge of the brake pad 10, so that the long hole 20
The lower edge 20a and the pin 12 are urged against each other. The urging force of the spring 18 is set so that the brake pad 10 can move closer to the side surface of the disc 2.

In the disc brake device constructed as described above, the long hole 20 formed in the conventional brake pad 10 has an axis line in the long axis direction as shown in FIG. Was formed so as to be parallel to the direction of the tangent line T to the disk that is orthogonal to the center line C of the above.

[0005]

When the engine of the vehicle is rotated at a high speed, the vibration generated from the engine is transmitted to the disc brake device and the disc brake body 1 including the pin 12 and the plate 16 of the brake pad 10 are provided. And resonate. At this time, in the conventional disc brake device described above, since the longitudinal axis of the long hole 20 is formed horizontally, the vibration in the direction indicated by the solid arrow in FIG. The impact will be exerted by being partially concentrated on the peripheral edge of the long hole 20 pressed against the pin 12. Therefore, in addition to the wear caused by the operation of the disc brake device, there is a problem that the wear of the long hole 20 in contact with the pin 12 increases due to the impact of vibration.

Further, when the disc brake device is operated, the brake pad 10 moves slightly with respect to the pin 2 in the rotational direction of the disc 2 with the disc 2 around the center point O of the disc 2. In the above conventional disc brake device, the longitudinal axis of the long hole 20 of the plate 16 is formed so as to be parallel to the direction of the tangent line T to the disc 2 which is orthogonal to the center line C of the brake pad 10. Therefore, the tangent line to the disc 2 in the long hole 20 and the axis line in the long axis direction of the long hole 20 are different, and the brake pad 10
However, there is a problem in that it cannot move smoothly in the rotation direction of the disc 2 and wear due to the operation of the disc brake device increases.

The present invention has been made to solve the above problems, and an object of the present invention is to improve the wear resistance of a long hole pressed against a pin of a brake pad in a disc brake device. .

[0008]

In order to achieve the above object, a disc brake device according to the present invention comprises a brake main body fixed to a vehicle body and a disc fixed to a wheel. A brake pad that is pressed against the disc surface by a caliper, and a pin that supports the brake pad so that the brake pad can be moved closer to the disc surface, and the brake pad is an elongated hole formed so as to be displaceable in the disc rotation direction. In the disc brake device, in which the pin is inserted into, and a spring for urging the peripheral edge of the elongated hole to press the pin is provided,
The long hole is formed by deflecting the long axis of the long hole so as to intersect the tangential direction of the disk.

[0009]

In the disc brake device according to the present invention constructed as described above, the long hole and the pin of the brake pad formed by deflecting the axial line of the long axis direction so as to intersect the tangential direction of the disc. Pressed against each other by springs. Therefore, when engine vibration or the like is transmitted to the disc brake device, the shock due to the vibration is dispersed, and the contact point of the long hole of the brake pad with the pin changes.

Further, in the disc brake device according to the present invention configured as described above, the longitudinal axis of the long hole of the brake pad intersects the tangential direction of the disc orthogonal to the center line of the brake pad. Since it is formed so as to be deflected, the brake pad smoothly moves in the rotation direction of the disk with respect to the pin inserted during operation.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disc brake device according to the present invention will be described below with reference to FIGS. In the drawings, the same reference numerals denote the same or corresponding parts.

As shown in FIG. 1, the disc brake device is roughly composed of a brake body 1 fixed to the vehicle body and a disc 2 fixed to the wheels.
Includes a brake pad 10 and a caliper 11 for pressing the brake pad 10 against the disc 2. In addition,
In this embodiment, calipers are provided on both sides of the disc 2.
An example in which 11 are provided so as to face each other will be described, but the present invention is not limited to this embodiment, and it is needless to say that the present invention can be applied to a disc brake device in which a caliper is provided on only one side of the disc 2.

A caliper 11 is provided on the inner surfaces of the brake body 1 which face each other so as to face each other, and a pair of pins 12 are provided on both inner surfaces. The caliper 11 is composed of a cylinder 13 connected to a hydraulic circuit (not shown) and a piston 14 fitted in the cylinder 13, and presses the brake pad 10 so as to sandwich it from both sides of the disc 2. .

The brake pad 10 is composed of a lining 15 contacting the side surface of the disc 2 and a plate 16 for supporting the lining 15. Brake pad
In the plate 10, the pin 12 is inserted into the plate 16, and the caliper 11 is driven to move close to the side surface of the disk 2, and the lining 15 is pressed against the disk 2 to brake the wheel. The plate 16 inserted into the pin 12 is movable toward the side surface of the disc 2 and the brake pad 10 is moved relative to the pin 12 when the disc brake device operates (during braking). An elongated hole 17 having a clearance with respect to the pin 12 is formed so that the pin 12 can be slightly displaced and moved in the rotation direction (the direction of the arrow shown by the chain line in FIG. 2).

Since the long hole 17 of the plate 16 is inserted into the pin 12 with a clearance, the long hole 17 may cause abnormal noise due to vibration or may come into contact with the pin 12 or the pin 12.
A spring 18 is provided to urge the inserted pin 12 and the brake pad 10 against each other so that the periphery of the brake pad 10 is not worn or damaged. The spring 18 is made of a wire-like wire, and has an engaging portion 18a formed by bending the center.
Both ends 18b are placed over the pin 12, and an engaging portion 18a formed at the center is engaged with the lower edge of the brake pad 10 to lift the brake pad 10 with respect to the pin 12 in FIG. The lower edge 17a of the slot 17 and the pin
12 and 12 are pressed against each other. The biasing force of the spring 18 is set so that the brake pad 10 can be moved closer to the side surface of the disc 2.

As shown in FIGS. 2 and 3, the elongated hole 17 of the brake pad 10 through which the pin 12 is inserted has a tangential line of the disc 2 whose longitudinal axis is orthogonal to the center line C of the brake pad 10. It is formed so as to be inclined with respect to the direction of T and deflected so as to intersect.

As shown in FIG. 3, the disc brake device according to the present invention having the above-mentioned structure has the lower edge 17a of the elongated hole 17 and the pin 12 in the size and direction of f ₁ by the spring 18.
And are biased against each other. Vibration is transmitted to the disc brake device in the magnitude and direction of F due to high-speed rotation of the engine, and when the disc brake main body 1 including the pin 12 and the plate 16 of the brake pad 10 resonate, the brake pad 10 springs 18. The contact point of the pin 12 of the long hole 17 changes to disperse the shock due to the vibration by moving to f ₂ against the pressing force of.
When the lining 15 is pressed against the disc 2 by driving the caliper 11, the brake pad 10 smoothly rotates the disc 2 along the longitudinal axis of the slot 17 with respect to the inserted pin 12. Will move in the direction.

In this embodiment, as shown in FIG. 2, the lower edge 17a and the upper edge 17b of the long hole 17 are linear and are deflected in the same direction with respect to the brake pad 10, but the description has been made. Without being limited to this, as shown in FIG. 4, the lower edge 17a and the upper edge 17b of the long hole 17 pressed against the pin 12 may be formed in an arc-shaped curve. Also, long holes
The direction of deflecting 17 is not limited to the same direction,
As shown in FIG. 5, it is also possible to have different symmetrical directions. Further, as shown in FIG. 6, the shape of the long hole 17 may be elliptical. The shape of the spring 18, the spring coefficient, etc. that influence the number of points where the spring 18 contacts the pin 12, the contact area, and the like are determined by the shape of the elongated hole 17 and the direction of deflection. The long hole 17 is deflected in a tangential direction having a radius R (see FIG. 7) from the center point O of the disk 2 to the central axis of the long hole 17, but when the radius R is large, the inclination angle of the tangent line is Since it becomes smaller and the central axis approaches horizontal as in the conventional case, it is desirable to make the deflection angle of the elongated hole 17 larger than the inclination angle of the tangent line.

As described above, in the disc brake device according to the present invention, the long hole formed in the brake pad 10
The term 17 is used to mean a hole formed in a shape such that the brake pad 10 can move in the rotational direction of the disc 2 with respect to the pin 12, such as an ellipse. It is used to mean that the axis of the axial direction is bilaterally symmetrical with respect to the tangential direction of the disk or is inclined in the same direction.

[0020]

As described above, according to the present invention, since the long hole and the pin of the brake pad formed by deflecting the axis of the long axis direction with respect to the tangential direction of the disk are pressed against each other by the spring, When the engine vibration or the like is transmitted to the disc brake device, the shock due to the vibration is dispersed, and the contact point of the hole of the brake pad with the pin changes. Therefore, according to the present invention,
It is possible to achieve unique effects such as improving the wear resistance caused by the operation of the brake pads in the disc brake device and the wear resistance of the long hole pressed against the pin caused by the vibration of the vehicle or the like. .

[Brief description of drawings]

FIG. 1 is a side view of a disc brake device.

FIG. 2 is a front view showing a brake pad of the disc brake device according to the present invention.

FIG. 3 is a conceptual diagram showing the relationship between the force of pressing the long hole of the brake pad and the pin of the disc brake device according to the present invention.

FIG. 4 is a front view showing a brake pad according to another embodiment of the present invention.

FIG. 5 is a front view showing a brake pad according to still another embodiment of the present invention.

FIG. 6 is a front view showing a brake pad according to still another embodiment of the present invention.

FIG. 7 is a front view showing a brake pad in a conventional disc brake device.

[Explanation of symbols]

 1 Brake body 2 Disc 10 Brake pad 11 Caliper 12 Pin 17 Long hole 18 Spring

Claims (1)

[Claims] 1. A brake main body fixed to a vehicle body and a disc fixed to a wheel, wherein the brake main body is pressed against the disc surface by a caliper, and the brake pad is attached to the disc surface. The brake pad, the pin is inserted into an elongated hole formed so as to be movable in the disc rotation direction, and the brake pad is urged to press the peripheral edge of the elongated hole and the pin. In the disc brake device provided with a spring, the disc brake device is formed by deflecting the axial line of the long hole in the long axis direction so as to intersect the tangential direction of the disc.