JPS59515Y2 - Brake pad holding device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pad holding device used in a type of disc brake in which a brake pad is guided by a torque member (fixing member) that receives braking force.

Conventionally, this type of disc brake has adopted the so-called open slide method in which the ears of the pad backing metal are simply engaged with the guide grooves provided in the fixed member, but if used under adverse conditions, the fixed member will rust and become loose. The pad back metal was stuck and the pad did not slide smoothly, causing unilateral movement and uneven wear.

For this reason, a method has been adopted to widen the clearance of the guide groove, but this method may cause rattling noises (ruddles) of the pad when the vehicle is running, and the pad backing metal may be placed in the fixed member's part. Due to the impact, a clunking sound is generated,
Also, since the pad is not structured to separate from the disc when not braking, the pad tends to remain in contact with the disc, which has the disadvantage of causing a dragging phenomenon and a sticking sound (squeak). Ta.

This invention was proposed in order to eliminate the above-mentioned drawbacks, prevent the pad back metal and the fixing member from rusting, and at the same time eliminate the generation of unpleasant noise.

That is, in the pad holding device of this invention, a holding plate having a concave portion extending in the axial direction of the disk is attached to a fixing member, and the concave portion is engaged with ears formed on both sides of the pad backing metal, so that the pad can be slid. In the supporting pad holding device, the end surface of the ear portion is inclined in the radial direction of the disk, and a leaf spring-like arm whose tip extends toward the disk in the sliding direction of the pad is provided on the holding plate on the disk insertion side. In the longitudinal direction of the arm, the tip is inclined in a direction away from the bottom of the recess, and in the transverse direction of the arm, the arm is inclined at an angle similar to that of the ear part. By pressing against the ear, a pressing force is applied to the pad in the direction of receiving the torque of the fixing member, in the direction of lifting the pad, and in the direction of moving away from the braking surface of the brake disk.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

1 and 2 show an example of a disc brake to which this invention is applied.

As shown in the figure, pins 11 and 1 are provided on both sides of the fixing member 10.
2 is slidably inserted, and a floating caliper 13 is supported by this pin, and inside the caliper 13, pads 20, 20' are arranged facing each other.

One pad 20 consists of a brake lining 21 and its back metal 22, and ears 23 and 24 are provided on both sides of the back metal 22, and the end surfaces of the ears are inclined in the radial direction of the brake lining and are fixed. The ears formed on the inside of the member 10 are slidably engaged with guide grooves 14, 15 having a complementary shape, thereby being supported so as not to fall off.

Similarly, the other pad 20' is attached to the brake lining 21.
' and its backing metal 22', and an ear part 23' provided on the backing metal.
, 24' are respectively engaged with said guide grooves 14,15.

A presser plate 30 and a backing plate 40 made of unskilled spring steel are fixed to the portions of the pads 20, 20' where the back metals 22, 22' contact the inner surface of the fixing member 10, respectively.

The holding plate 30 is located on the input side of the disk and has a shape as shown in FIG.

FIG. 4 is a developed view.

As shown, the overall shape is Paco-shaped, and the -F end has a pair of tabs 31, 31 and 31'.

31', and arms 32.3 on both sides of the central part.
2 is formed.

Moreover, the missing portion 33 in the center is a space through which a disk can pass.

By bending such a plate material along the chain line in the figure, as shown in FIG.
The arms 32 and 32' are shaped so as to fit snugly against the surrounding walls, and the arms 32 and 32' are shaped like trapezoidal recesses 34.
．． Fold back inside 34'.

At this time, the arm is not brought into close contact with the bottom of the recess, but is kept at an appropriate distance so that the arm acts as a leaf spring.

The angle of the leaf spring is set so as to apply a pressing force to the pad in the direction away from the sliding surface of the disk, in the direction of receiving the torque of the fixing member 10, and in the direction of lifting the pad upward in FIG.

That is, as shown in FIGS. 5 and 6, the arm 32 is
In the longitudinal direction, the tip is inclined away from the bottom of the recess 34, and in the transverse direction, it is inclined at the same angle as the end face of the ear 24.

FIG. 3 shows the directions of the component forces x, y, and z with respect to the resultant force F.

Such a presser plate 30 is connected to a bridge 35 as shown in the figure.
It does not need to be connected at the part, and it may be separated into two parts.

Further, the arms 33 and 32' may not be integrated, but may be fixed separately by welding or the like.

The shape of the presser plate 30 is not limited to that illustrated.

It can be changed as appropriate to suit the shape of the inner surface of the fixing member 10.

However, as shown in FIG. 6, the bottom 36 of the recess 34 preferably has the same slope as the spring arm 32, and the ear 24 of the pad back metal 22 also has a similar shape to the recess 34.

Next, the abutting plate 40 is fixed to the exit side of the disk, and has a shape similar to that of the retaining plate 30 with the arms 32 and 32' removed, as shown in FIG.

In the figure, 41.41' is a tab 44.44' is a concave portion.

Now, these presser plates 30 and backing plates 40 are attached to the fixing member 10.
It is fixed to the inner surface of the back metal 22.
, 23', 24' are respectively recessed parts 34, 34', 4
4.44' to attach pad 20.20'.

At this time, the arms 32 and 32' extend inward at their tips along the grooves 15 of the fixing member and are sloped as described above, so that the arms 32 and 32' extend inwardly along the grooves 15 of the fixing member and are inclined as described above.
24' is controlled by arms 32 and 32' of the presser plate 3B,
It receives a force F (Figure 3).

This force F is equal to X as shown. It can be divided into components of force in the Y and Z directions.

First, the component force FX is the constant fixing member 1 of the pad 20.20'.
Since it is pressed in the direction of the 0 torque receiver, it prevents rattling noise (raddle) when not braking and clunking noise when braking in this direction.

Next, since the component force FY always presses the pad 20, 20' in the direction of lifting it in the - direction, it prevents rattling noise (raddle) when the pad is not braking in the vertical direction.

Finally, the partial pressure F2 always tries to move the pad 20°20' away from the braking surface of the disc, which prevents rattling noise when not braking in this direction, and at the same time eliminates the drag phenomenon caused by the disc, Since contact with the disk at point A in Figure 1 is prevented, no stick sound (squeak) is generated.

In particular, since the pad is separated from the disk at a position close to the outer periphery of the disk, this effect is significant.

In addition to the above, by providing a bridge part, it is possible to prevent foreign matter from entering the disk part, and by inserting stainless steel into the guide part of the pad, it is possible to prevent the pad from sticking due to rust. .

According to this invention, as described above, many effects can be achieved with a very simple structure, so it is very advantageous in terms of cost.

[Brief explanation of drawings]

Fig. 1 is a plan view of a disc brake equipped with the presser plate of this invention, Fig. 2 is a sectional view taken along the line 2-2 of the same as above, Fig. 3 is a perspective view of the presser plate, and Fig. 4 is a plan view of the disc brake of the same as above. 5 is a longitudinal sectional view of the arm portion, FIG. 6 is a cross-sectional plan view of the arm portion, and FIG. 7 is a perspective view of the backing plate. 10... Fixed member, 13... Caliper, 14.15
...Guide groove, 20.20'...Pad, 22.2
2'...Secret money, 23.24.23'. 24'...ear part, 30...pressing plate, 31.31'.
・Tab, 32.32'...Arm, 34.34'・
・Concavity.

Claims (1)

[Scope of utility model registration request] A device for slidably supporting a pad by attaching a presser plate having a concave portion extending in the axial direction of the brake to a fixing member, and engaging ears formed on both sides of a pad back metal of the brake to the four parts, The end surface of the ear portion is inclined in the radial direction of the disk, and a leaf spring-like arm whose tip extends toward the disk in the sliding direction of the pad is provided in the recess of the presser plate on the insertion side of the disk. In the length direction, the tip is inclined in a direction away from the bottom of the recess, and in the transverse direction of the arm, it is inclined at an angle similar to the end face of the ear part, and the arm is pressed against the end face of the ear part. A brake pad holding device characterized by: