JPS6330826Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a pad clip that is interposed between the support and the backing of the pad that slides while being guided by the disc brake support. We have improved the conventional pad clip, which generates a warning sound when the tip comes into contact with the side of the rotor when the pad lining wears to the maximum allowable limit. To provide a pad clip for a disc brake capable of preventing so-called dragging in which the lining of the pad remains in sliding contact with the side surface of a rotor.

For example, as shown in Fig. 1, a disc brake has protrusions on both left and right ends of a pad back metal 4 in left and right guide grooves 3, 3 of a support 2, which is fixed to the vehicle body by screwing bolts into screw holes 1, 1. The parts 4a and 4a are loosely connected, and this pad is supported so that it can freely slide in a direction perpendicular to the plane of the paper on the support 2, and when braking is performed, it is located on both the front and back sides of the rotor 5 that rotates with the wheels. Two pads are strongly pressed against both sides of the rotor 5 by a caliper 8 supported on the support 2, and braking is performed by the frictional force between the lining of the pads and the rotor.

In the disc brake constructed and operated in this way, the back metal 4 of the pad is formed by the protrusions 4 at both left and right ends.
Since a and 4a are loosely engaged with the guide grooves 3 and 3 of the support 2, if left as is, the back metal 4 will rattle within the support 2 due to vibrations etc. during running and generate noise. For this reason, it has traditionally been
A leaf spring called a pad clip is installed between the pad and the support 2 to suppress rattling of the pad within the support 2. Furthermore, it has been conventional practice to use this pad clip to generate an alarm when the lining of the pad is worn to an acceptable limit. That is, as shown in FIGS. 1 and 2, one piece 6b of the pad clip 6 is formed by bending both ends of a long U-shaped base 6a made of an elastic material at right angles in the same direction to form pieces 6b and 6c. 4, the other piece 6c protrudes toward the rotor 5 from between the back metal 4 and the inner surface of the groove 3 of the support 2, and its tip is fixed to the lining 7.
It is made to protrude to the position of the maximum allowable wear thickness l. In such a pad clip 6, the piece 6c presses against the inner surface of the groove 3 to prevent the pad from rattling within the support 2, and when the lining 7 is worn to the maximum allowable limit, the tip of the piece 6c will press against the inner surface of the groove 3. The entire pad clip 6 vibrates finely as it comes into sliding contact with the side surface, generating an alarm sound to notify the pad of replacement time.

However, even with the conventional pad clip constructed and operated as described above, there were still some inadequacies as described below. That is, since the piece 6c of the pad clip 6 shown in FIG. 2 merely presses against the inner surface of the guide groove 3 of the support 2, although it is possible to prevent the pad from rattling within the support, it is difficult to release the brake. Later, lining 7 is attached to rotor 5.
There was no action to pull it away from the sides. For this reason,
In conventional disc brakes equipped with pad clips, the lining 7 lightly slides against the side surface of the rotor 5 even when braking is not being applied, resulting in drag.

The pad clip for disc brakes of this invention has one end fixed to a support and the other end presses diagonally outward on the side of the pad's back metal that faces the rotor. This prevents dragging.

Hereinafter, the present invention will be explained in more detail with reference to drawings showing embodiments.

Figures 3 and 4 show a first embodiment of the pad clip of the present invention. This pad clip 9 is made entirely of an elastic metal plate, and has a V-shaped elastic portion 11 continuous to one end of a crank-shaped base portion 10. Furthermore, the end of this elastic part 11 is bent in the opposite direction to the base 10 to form an abutment piece 12.
It is said that The bent portion 13 between the base 10 and the elastic portion 11 and the intermediate bent portion of the elastic portion 11 have an elasticity that tends to return to the original angle when the angles a and b formed by the respective bent portions are changed. Granted. Further, the height h of the abutment piece 12 is formed in accordance with the maximum allowable wear thickness of the lining 7 of the pad to which the pad clip 9 is to be attached.

Next, the disc brake of the present invention formed as described above is installed between the support 2 and the pad as shown in FIGS. 5 and 6. That is, the base 10
A screw 16 inserted into a mounting hole 15 drilled at the end of the
fix the base 10 to the outer surface of the support 2,
The end of the elastic part 11 having the contact piece 12 is connected to the surface of the back metal 4 of the pad and the lining 7 attached to this surface.
It suppresses the corner where it intersects with the side of the There is a concave groove 17 in the attachment part of the pad clip 9 of the support 2.
is formed, and the pressing portion 11 of this pad clip 9 enters inside this groove 17. In this state, the angle a' (Fig. 6) of the bent part 13 between the base 10 and the resilient part 11 is smaller than the angle a (Fig. 4) when the pad clip 9 is in the free state, and the The angle b' (Fig. 6) of the bent part 14 in the middle of the part 11 is the angle b in the free state.
(Figure 4). Therefore, the pad pressed by the end of the pressing portion 11 has elasticity that pushes the pad inward (leftward in FIG. 6) and in a direction that moves the pad away from the rotor 5 (bottom in FIG. 6).
As a result, this pad is pressed toward the lower left in FIG. 6 by the pad clip 9. For this reason, the pad does not rattle inside the support 2, and when the force to press the back surface of the back metal 4 disappears when braking is not applied, this pad is moved away from the rotor 5, and the lining 7 slides against the side surface of the rotor 5. There will be no more contact.

As the lining 7 wears, the back metal 4 of the pad approaches the side surface of the rotor 5, and accordingly the abutment piece 12 at the end of the elastic pressure portion 11 also approaches the side surface of the rotor 5. When the lining 7 wears down to the maximum allowable wear thickness, the end edge of this abutment piece 12 slides against the side surface of the rotor 5, causing the entire pad clip 9 to vibrate finely, emitting an alarm to inform the user that it is time to replace the pad.

Next, FIG. 8 shows a second embodiment of the present invention. This embodiment is constructed so that the pad clip 9 can be attached to the support 2 without using screws, and U-shaped clamping pieces 18 are formed on both sides of the base 10 of the pad clip 9. The pad clip 9 is supported by the holding pieces 18, 18.
It is attached so that the groove 17 is sandwiched between the inner edges of the holder. The other configurations and operations are the same as in the first embodiment described above.

Since the disc brake pad clip of the present invention is constructed and operates as described above, it is possible to prevent the pad from rattling within the support 2, and to make it easy to detect when it is time to replace the pad due to wear of the lining. In addition, it has great practical effects, such as preventing the lining and rotor from dragging when not braking and effectively preventing abnormal noise from occurring when not braking.

[Brief explanation of drawings]

Figures 1 and 2 show a disc brake equipped with a conventional pad clip, with Figure 1 being a front view, Figure 2 being an enlarged sectional view taken along line A-A in Figure 1, and Figures 3 and 2 showing a disc brake equipped with a conventional pad clip.
Figure 7 shows the first embodiment of the present invention, Figure 3 is a perspective view of the pad clip, Figure 4 is a side view of the same,
Figures 5 and 6 show the state in which it is attached to a disc brake, with Figure 5 being a partial front view and Figure 6 being the 5th
FIG. 7 is a sectional view similar to FIG. 6 showing a worn state of the lining, and FIG. 8 is a perspective view of a pad clip showing a second embodiment. 1: Screw hole, 2: Support, 3: Guide groove, 4:
Back metal, 4a: protrusion, 5: rotor, 6: padded clip, 6a: base, 6b, 6c: piece, 7: lining, 8: caliper, 9: padded clip, 1
0: Base, 11: Pressure part, 12: Contact piece, 13,
14: Bent part, 15: Mounting hole, 16: Screw, 1
7: Concave groove, 18: Holding piece.

Claims (1)

[Scope of utility model registration request] The other end of the V-shaped pressing part 11, which has one end continuous with the base 10 attached to the support 2 of the disc brake, is bent to the side opposite to the base 10, and is slidably held inside the support 2. An abutment piece 12 with a height equal to the maximum allowable wear thickness of the lining 7 of the pad is formed, and the end of the elastic part 11 having this abutment piece 12 touches the corner of the lining 7 of the pad and the back metal 4. A disc brake pad clip that applies pressure diagonally away from the rotor 5.