JPH0124441Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pad liner holding structure for a disc brake.

A type of disc brake in which a pair of pads placed opposite each other around a rotor disc is supported by a torque member is designed to stabilize the sliding resistance of the pads and at the same time prevent abnormal noises such as rattle sounds. Pad sliding part 1 of torque member 1 as shown in the figure
In most cases, a pad liner 20 made of a stainless steel plate or other non-corrosive material is attached to the base plate 1. In this case, the liner 20 is provided with pawls 21 and 22 facing each other on the side edge portion, which engage the surface of the rotor storage groove 12 formed in the sliding portion and the end surface 13 parallel thereto, respectively. It is fixed to the torque member 1 using the spring force applied to the liner, but at that time, if the liner assembly surface of the torque member is still a cast surface, the end surface 1
Due to variations in the dimensions from No. 3 to the rotor groove, variations in the assembly force of the liner become large.

Therefore, the liner may become difficult to assemble or, conversely, may come off easily. If you forcefully attach something that is difficult to assemble, the liner will deform and the sliding resistance of the pads will increase, resulting in the release of the braking force. Sometimes, it becomes difficult for the pad 30 to return to its original position, and the drag torque increases. On the other hand, if the holding force is weak, the pad may fall off from the torque member before it is installed, and if this falling is not noticed, the liner may not be properly assembled.

As a solution to this problem, there are brakes in which the liner assembly surface of the torque member is machined, but this increases the cost because it requires additional machining steps.

Therefore, the object of this invention is to provide a holding structure that can stabilize the assembly force of the liner without adversely affecting the cost.

Hereinafter, the configuration of this invention will be explained based on the attached FIGS. 2 and 3.

As shown in the figure, a pair of bridge parts 10, 10' formed on both sides of the torque member 1 are provided with opposing protrusions 14, 14 and 15, 15 that support the back metal 31 of the pad 30. The pad liners 20 are assembled at the locations where these protrusions are located, with the disk rotor D (see FIG. 3) at the center, in opposite directions. Note that the pad liner 20 is the same as the conventional one. That is, locking claws 21 (third
) is provided with elastic claws 22 facing each other, and one of the claws 21
is engaged with the surface of the rotor housing groove 12 of the torque member as in the past.

On the other hand, the elastic claws 22 of the liner are designed to be locked at the later-described locations, which is a feature of the present invention. That is, on the end surfaces 13, 13 and 13', 13' of the bridge portion of the torque member 1,
Recesses 16 whose groove surfaces gradually approach the disc rotor as they move away from the center of the brake (the depth from the end surface becomes deeper) are provided corresponding to the elastic claws 22 of the liner. Tapered surface 17
The elastic claws 22 of the liner 20 are brought into pressure contact with each other.

With the above configuration, due to the spring force of the claw 22,
Not only do the two claws 21 and 22 of the liner come into pressure contact with the torque member, but also the board 23 comes into pressure contact with the torque member due to the attractive force in the direction of arrow A acting on the contact portion of the claw 22. The contact point is closer to the rotor than the end surface of the sliding part. Therefore, even if the liner cannot be assembled with sufficient force in the conventional way, it will not fall off, and
If the assembly force is tight, the spring force of the pawl 22 is relieved by the recess, making it easier to assemble the liner.
The assembly force is also stable. Furthermore, the recess 16 can be formed using a mold during casting of the torque member, thereby solving the problem of cost.

The liner holding structure of this invention described above is also applicable to a type of disc brake in which a groove is provided in the pad sliding portion of the torque member to engage the shoulder of the pad back metal, and a pad liner is installed therein.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the pad liner holding structure of the present invention, Fig. 2 is a view of a disc brake employing this invention's holding structure as seen from the wheel side with the caliper removed, and Fig. 3 is the same as above. FIG. 1... Torque member, 10... Bridge part, 1
1... Pad sliding surface, 13... End face, 16... Recess, 17... Tapered surface, 20... Pad liner,
21... Locking claw, 22... Elastic claw, 30... Pad, 40... Caliper, D... Rotor.

Claims (1)

[Scope of utility model registration request] One of the claws provided opposite to the side edge portion is engaged with the surface of the rotor housing groove of the torque member, and the other claw with spring force applied is engaged with the end face of the torque member, respectively.
In a disc brake in which a liner is assembled to the pad sliding part, a recess is provided on the end face of the torque member, the groove surface of which gradually approaches the disc rotor as it moves away from the center of the brake, and the tapered surface of this recess is A pad liner holding structure characterized in that the tip of the other claw is brought into pressure contact with the tip of the other claw.