JPS5913377Y2 - disc brake - Google Patents

Description

[Detailed description of the invention] This invention uses a pad spring that buffers vibrations of the friction pad and caliper of a brake to prevent wear of the sliding part when the back metal of the friction pad slides on the caliper holder. On the other hand, it concerns a dual-use disc brake.

Conventionally, a typical disc brake has a caliper attached to a caliper holder attached to a vehicle, and two pins provided on the caliper are used as guides to support the caliper so that it can slide in the axial direction of the disc. - A pair of friction pads facing each other are slidably installed in the guide part provided on the holder, sandwiching the disc, and the back side of one friction pad is installed so that it can move forward and backward into a part of the cylinder installed in the caliper. At the same time, the back surface of the other friction pad is brought into contact with a caliper leg provided on the caliper opposite to the cylinder part, and the piston is pressed by the pressure oil supplied to the cylinder part. There is one that displaces the disk and clamps the disk between both friction pads.

In the above type of disc brake, the caliper
A pad spring is installed in this space by utilizing the space created between the caliper and the friction pad that slides on the guide part of the caliper holder to prevent rattling due to vibration etc. of both the caliper and the friction pad. There is.

In addition, if the caliper holder is made of a comparatively compliant material such as aluminum alloy due to ease of manufacture, in order to prevent wear of the caliper holder when the friction pad slides on the caliper holder, A separate piece for preventing wear was provided between the locking part of the friction pad and the guide part of the caliper holder.

The present invention reduces the number of parts by using a single member as the pad spring and the wear prevention piece.
The purpose is to facilitate assembly.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a caliper holder attached to a vehicle, which is made of a material such as aluminum alloy, which is more easily worn than the back metal of a friction pad, which will be described later.

Reference numeral 2 denotes a caliper slidably supported by the caliper holder 1 via pins 3, 3, which straddles the disc 10 and has, for example, a cylinder part 4 on the caliper 2 and on the other side. It has a leg portion 5, and a piston 6 is installed inside the cylinder portion 4 so as to be movable forward and backward.

The caliper holder 1 is provided with guide parts 7, 7, and the back metals of the friction pads 8, 9 can be slid onto the guide parts 7, 7 in the axial direction of the disc 10 by means of their locking parts 16. is set up.

Incidentally, reference numeral 11 in FIG. 2 is a boot that prevents rainwater and dust from entering into the cylinder part 4.

With the above configuration, pressure oil is supplied into the cylinder part 4 through an oil passage (not shown), the piston 6 is advanced, and the friction pad 8 in front of the piston 6 is moved to the one end surface of the disk 10. When the caliper 2 is pressed against the caliper holder 1, the reaction force causes the caliper 2 to move backward with respect to the caliper holder 1. As a result, the caliper legs 5 press the friction pad 9 against the tooth disk 10, and the wheel (not shown) ) is used to perform disc braking in conjunction with the

Next, the third. 4. 5. 6. This will be explained with reference to each figure in FIG.

The pad spring 12 is made of a single steel plate with a convex piece 12.
a protrudes from the tip, protrusions 12b, 12b are provided at both ends of the rear end 12d, and a recess 12 is provided at the middle of the rear end 12d.
After punching out the shape C, bend the rear end 12d inward, stand the center part vertically to some extent, then bend it halfway down into an inverted U shape, and then horizontally in the middle. The protruding piece 12a is protruded forward so as to be lifted up at a gentle slope, and the rear end protruding portion 12b is bent downward at a right angle.

The tip of the convex piece 12a contacts the bottom of the protrusion part 2a of the caliper 2, while the center part contacts the friction pads 8, 9.
The friction pad 8 is in contact with the upper end of the locking part 16 of the back metal
9 and the caliper 2. The bent protrusion 12 plays the role of a leaf spring that buffers the rattling caused by the vibration of the caliper 2.
b is a positioning stopper in the width direction of the caliper holder 1, which comes into contact with the side walls of the guide portions 7, 7 provided on the caliper holder 1 to restrict displacement of the disk 10 in the axial direction.

Moreover, the notch part of the recess 12C is provided to allow the disc 10 to escape, and the rear end part 12d is provided with the locking part 16 of the back metal of the friction pads 8 and 9 and the guide part 7 of the caliper holder 1. This part is interposed between the friction pads 8 and 7 to constitute a sliding part of the caliper holder 1, and serves to prevent wear of the caliper holder 1 due to sliding of the friction pads 8 and 9.

That is, one end of the pad contacting side of the pad spring 12, which is installed in the space between the back metal of the friction pads 8, 9 and the caliper 2 and urges the two in opposite directions, is connected to the back metal of the friction pads 8, 9. It wraps around the lower, side, and upper surfaces of the locking portion 16, and is fixed in position by contacting the side wall of the guide portion 7 of the caliper holder 1, thereby connecting the locking portions 16 of the back metals of the friction pads 8 and 9 to the caliper. It is interposed between the guide portion 7 of the holder 1 and the guide portion 7 of the holder 1 .

Fig. 8 shows the case where the pad spring of the present invention is installed in the caliper holder 1, and the state in which it is installed. Since it is a single part, the number of parts is reduced and the number of assembly steps is reduced by one step, making assembly easier.

9.10.11.12 shows a modification of the pad spring 12 of the present invention.

In this case, a groove 13b is provided in the convex part 13a and the center part of the pad spring 13, and the convex part 13a is divided into two pieces, each of which is connected to the friction pad 8.
This is to prevent the center portion of the pad spring 12 from coming into partial contact with either one of the friction pads 8°9.

Figures 13, 14, 15, and 16 show another modification of the pad spring, and Figure 17 shows a state in which this pad spring is installed. The protruding piece 14a corresponding to the protruding piece 13a of the spring 13 is bent into a U-shape at approximately the midpoint 14b.

In this pad spring 14, the convex portion 14
Since the structure is such that a is not extended to the contact point near the center of the bottom of the bridge portion 2a of the caliper 2, but is bent halfway and turned back, a space is created in the center of the bottom of the caliper 2, and the boot 11 and pad spring 14 are The bridge part 2a that straddles the disc 10 of the caliper 2
can be brought as close as 10 degrees to the disk, which has the advantage of improving strength.

18.19.20.21 shows yet another modification, in which the pad spring 15 is replaced by the pad spring 1.
4, connect the ends of the two-pronged piece 14a,
A protrusion 15b is provided in the northern part.

This protrusion 15b serves to prevent the corner of the tip of the pad spring 14 from getting caught on the caliper 1 when the caliper 1 slides.

Note that the pad spring 12 may be provided with a protrusion similar to the protrusion 15b, and the pad spring 12 may be provided with a groove 1 like the pad spring 13.
3b, the curved piece part 1 is used like the pad spring 14.
2a may be bent halfway and used.

Furthermore, even if the caliper holder 1 is made of the same type of metal (e.g. iron) as the back metal of the friction pad, in addition to aluminum alloy, a wear prevention material is used to reduce galling caused by the same type of metal and sliding resistance with the friction pad. A piece may be interposed.

With the present invention as described above, the pad spring also has the function of a wear prevention piece between the back metal of the friction pad and the caliper holder, which reduces the number of parts and facilitates assembly. The locking part of the back metal of the friction pad is
Since the bottom, side, and top surfaces of the pad spring are wrapped around one end of the pad spring, when the back metal of the friction pad slides, the sliding resistance at the guide part of the caliper holder is reduced and the caliper is - The wear resistance and strength of the holder are improved, and the pad spring is fixed in position at one end via the side wall of the guide part of the caliper holder, so the direction of action of the spring force and the spring force are stable. You can obtain effects such as doing so.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the disc brake of the present invention. FIG. 2 is a sectional view taken along line II--II in FIG. 1, and FIG. 3 is a plan view of the material of the pad spring of the present invention. FIG. 4 is a plan view of the pad spring of the present invention. FIG. 5 is a front view of FIG. 4. 6 is a right side view of FIG. 5, and FIG. 7 is a left side view of FIG. 5. Fig. 8 is a perspective view of an example of use, Figs. 9, 10, 11, and 12 are a plan view, front view, right side view, and left side view of each of the other pad springs, and Figs. 13, 14, 15, 16 The figures also show a top view, a front view, a right side view, and a left side view of another pad spunong. Figure 17 is a sectional view of another embodiment, and Figures 18, 19.
Figures 20 and 21 are a plan view, a front view, a right side view, and a left side view of another pad spunong, respectively. 1... Caliper holder, 2... Caliper 14... part of the cylinder, 5...
・Caliper leg, 6...Piston, 7,7・
...Guiding part, 8, 9...Friction pad, 1
0...Task, 12.13. 14.15
...Pad spring.

Claims (1)

[Scope of utility model registration request] A caliper that straddles the disk is supported by a caliper holder fixed to the vehicle so as to be able to slide freely in the axial direction of the disk, and the back metals of a pair of friction pads that are arranged on both sides of the disk and have locking parts are attached to the caliper. Each of the friction pads is engaged with the guide portion of the holder and slidably guided in the axial direction of the disc, one of the friction pads is pressed against the disc by a piston provided in the caliper, and the other friction pad is pressed against the disc by the piston provided in the caliper. In a disc brake that is pressed against a disc by a caliper that is displaced by a distance, one end of a pad contacting side of a pad spring installed in a space between a back metal of the friction pad and the caliper and biases both in opposite directions. The backing plate of the friction pad is wrapped around the lower surface, side surface, and upper surface of the locking part of the backing plate of the friction pad, and is fixed in position by coming into contact with the side wall of the guide part of the caliper holder. A disc brake characterized in that the friction pad is interposed between a locking part of the brake pad and a guide part of a caliper holder on which the friction pad slides.