JPS59513Y2 - disc brake device - Google Patents

Description

[Detailed description of the invention] The present invention comprises a disc brake device, in particular a brake disc that rotates together with the wheel; a bracket that is fixed to the vehicle body adjacent to the brake disc; and a bracket that is slidable in the axial direction of the brake disc. a pair of left and right friction pads that are supported by and can slide against both sides of the brake disc; a brake caliper that straddles both of the friction pads and is detachably connected to the bracket to operate both of the friction pads; A pad spring is interposed between a brake caliper and both friction pads and springs both friction pads against a bracket.

In the conventional disc brake device, the pad spring was completely independent from the brake caliper, so it was necessary to remove the pad spring each time for inspection, maintenance, pad replacement, etc., and it was easy to lose it.
Another disadvantage is that it is troublesome to set the pad spring in a predetermined position during reassembly.

The present invention has been proposed in view of the above, and is capable of eliminating all of the above-mentioned drawbacks.Moreover, it can effectively suppress the vibration of both friction pads, and the pad spring can be easily installed in a narrow space inside the brake caliper. The object of the present invention is to provide a disc brake device in which the pad spring has a simple structure and is easy to manufacture, and is characterized by first and second pressure springs extending parallel to each other in the axial direction of the brake disc. A pad spring is formed into a frame shape by a wire rod and left and right connecting spring wire rods whose ends are integrally connected to each left end and each right end of these pressing spring members, respectively, and each of the connecting spring wire rods has a shape in the center thereof. The provided retaining protrusion in the axial direction of the brake disc, and intermediate portions between both ends of the retaining protrusion and the engaging protrusion are respectively engaged with the brake caliper to prevent the first and second retaining protrusions from falling off from the caliper. The two pressing spring wires are elastically pressed against one end and the other end of each of the friction pads in the circumferential direction of the brake disk.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
The bracket 2, which is fixed to the vehicle body adjacent to the brake disc 1 that rotates with the wheels of the vehicle, has both front and rear ends bent so as to straddle the outer circumference of the brake disc 1 from side to side (see Fig. 6). Front and rear two arms (see Figure 3)
That is, it branches into a bracket forearm part 2a and a bracket rear arm part 2b, and the bracket front and rear arm parts 2a, 2b
In between, friction pads 40, 4□, which can come into sliding contact with both the left and right sides of the brake disc 1, are fixedly installed.
A pair of back plates 51.5□ are installed in a conventionally known manner so as to be slidable in the left and right directions, that is, in the axial direction of the brake disc 1.

The brake caliper 3 is connected to the pair of left and right back brakes)5. ．． Back play with the left and right arm parts 3a and 3b placed on the left and right sides of 5 degrees, and both arms) -5,,5
A hydraulic cylinder 8 is formed in the right arm part 3b, and a piston 7 that can press the back surface of the right back plate 5 is slid onto the hydraulic cylinder 8, and the left arm part 3a is connected to the bridge part 3C connected above □. The inner surface of the left back plate 5 is brought into contact with the back surface of the left back plate 5.

The right arm portion 3b has a pair of ears at its front and rear ends, and sliding pins 9a and 9b parallel to the axis of the brake disc 1 are fixed to each ear using bolts 10a and 10b. Then, the sliding pins ga and 9b are inserted into the front and rear arm bearing holes 2a□, which are drilled in the front and rear arm parts 2a, 2 and b of the bracket.
2b, (only 2a is shown in FIG. 6) is slidably and rotatably fitted.

Note that the viewing window 3d provided in the bridge portion 3C is mainly for monitoring the degree of wear on the friction pads 4□, 4□, and also for monitoring the degree of wear of the friction pads 4□, 4□. The inlet 3e is connected to a known brake mask cylinder via a hydraulic conduit (not shown).

The pad spring 6 that can press the back plates 5□, 5□ against the bracket 2 has a front left spring portion 6a1 and a rear left spring portion 6a2 that are integrally connected by a plate fitting 6d, so that the center is high and the front and rear ends are high. A left connecting spring wire 6a configured to be lower, a front right spring portion 6c, and a rear right spring portion 6c.
2 are integrally connected by a plate fitting 6e, and the right connecting spring wire 6C is configured in the same manner as above, and the first and second pressing spring wires 6b1 and 6b2 extend parallel to each other in the disk 1 axis direction. The left ends of both pressing spring wire rods 6b, 6b2 are integrally connected to both ends of the left connecting spring wire rod 6a, and the right ends thereof are integrally connected to both ends of the right connecting spring wire rod 6c. The spring 6 is formed into a frame shape as a whole.

The plate fittings 6d and 6e located at the center of each of the connecting spring wires 6a and 6C are integrally formed with retaining protrusions 11 and 12 that protrude outward in the axial direction of the disk,
These protrusions 11, 12 are engaged with the upper edge of the opening of the viewing window 3d.

Mb Each spring portion 6ax of each connecting spring wire 6a, 6C,
( (See FIG. 4.5), in particular, the earthen wall of the groove 13 serves as an elastic fulcrum for each connecting spring wire 6a, 6c, and supports each pressing spring wire 6b□, 6b2 on the back plate 5.

It can be elastically pressed against both the front and rear ends of 5□.

Furthermore, the connecting ends of the respective pressing spring wire rods 6b1, 6b2 and the respective connecting spring wire rods 6a, 6C are connected to the respective connecting spring wire rods 6a,
It is formed in an arcuate shape that bulges outward in the axial direction of the disk 6c.

Next, to explain the operation of this embodiment, when pressure oil is supplied to the hydraulic cylinder 8, the friction pad 4□ of the back plate 5° is moved to the left while sliding on the bracket 2 as the piston 7 moves forward. is pressed against the right side surface of the brake disc 1.

Then, due to the reaction, the brake caliper 3 moves to the right while sliding the sliding pins 9a and 9b inside the bearing holes 2a1 and 2b, respectively, and the friction pad 41 is pressed against the left side surface of the brake disc 1. Braking is applied to 1.

To replace worn friction pads 4□, 42, use Pol'
Either one of r-10a or 10b, for example bolt 1
0a and then rotate the brake caliper 3 outward around the sliding pin 9b connected to the remaining bolt 10b.The pad spring 6 will also rotate together with the brake caliper 3. , the backs of both back plates 5□, 52 are released, so these back plates 5□, 5
□ can be removed from the bracket 2 and easily replaced with a new part.

As described above, according to the present invention, since the pad spring 6 can be supported independently on the brake caliper 3,
When performing inspection, maintenance, or replacement of the friction pads 4□ and 42, place the brake caliper 3 on the bracket 2.
The pad spring 6 integrated with the caliper 3 can be automatically removed from the normal set position or automatically assembled to the set position by simply moving it relative to the caliper 3 or attaching and detaching it, greatly improving work efficiency. It is possible.

Moreover, since the pad spring 6 is always held integrally with the caliper 3, there is no need to worry about losing it.

In particular, the pad spring 6 of the present invention includes first and second pressure spring wires 6b, 6b2 extending parallel to each other in the axial direction of the brake disc 1, and these pressure spring wires 6b1, 6.
The left and right connecting spring wires fia, 13c are integrally connected to each left end and right end of b2, respectively, to form a frame shape, and each of the connecting spring wires 6a, 6C is connected to a brake provided in the center thereof. Engagement protrusions 11 and 12 in the axial direction of the disk and both ends thereof and the engagement protrusions 11 and 12
The intermediate portions of the first
The second pressing spring wire rods 6b1 and 6b2 are in elastic pressure contact with the two friction pads 40, one end and the other end in the 4° circumferential direction of the brake disc, respectively, so that they should be incorporated into a disc brake device. As the pad spring 6, it is sufficient to prepare just one piece made of thin elastic wire in a relatively simple frame shape, making it easy to manufacture and reducing costs.Moreover, the spring 6 itself is formed to be slender. This contributes to weight reduction, and it can also be easily installed in the narrow space inside the caliper 3, and the spring 6 does not block the viewing window 3d of the caliper bridge portion 3C.

The first and second pressing spring wire rods 6b1 and 6b2 of the frame-shaped pad spring 6, both connecting spring wire rods 13a,
Since both ends of both friction pads 4□, 4° can be bounced directly and equally in a posture in which both sides are stably supported by brake caliper 3 via fic, both friction pads 41, 4□ Vibration can be effectively suppressed.

In addition, the left and right connecting spring wires 6a and 6c of the frame-shaped pad spring 6 apply an elastic expansion force outward in the axial direction of the disc 1 to their central portions, thereby causing the engaging protrusions 11 and 12 to move into the caliper. 3, and the pad spring 6 can be easily attached to the caliper 3 by simply elastically deforming the center portions of both connecting spring wires 6a, 6c inward in the axial direction of the disc 1. Can be done.

Furthermore, the connecting ends of the respective pressing spring wire rods 6b1, 6b2 and the respective connecting spring wire rods 6a, 6c are connected to the respective connecting spring wire rods 6a,
Since the pad spring 6 is formed in an arc shape that bulges outward in the axial direction of the brake disc 1, the overall shape of the pad spring 6 does not need to be increased to the left, and the radius of curvature of the connection end can be decreased to the left. Each pressure spring wire rod 6b1, 6b
2, that is, the pads 4□, 4□ can contribute to compactness of the disk 1 axial direction outer ring 6 of the pressing portion.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention's disk brake device, FIG. 2 is a sectional view taken along the line II--II of FIG. 1, FIG. 3 is a sectional view taken along the line III--III of FIG. 1, and FIG. Figure 1■■-
5 is a sectional view taken along line I--V in FIG. 1, FIG. 6 is a sectional view taken along line VI--VI in FIG. 1, and FIG. 7 is a detailed view of the plate fitting. 1... Brake disc, 2... Bracket, 3...
・・Brake caliper, 4□, 42・・Friction pad,
6... Pad spring, [ia, 6c... Left and right connecting spring wire rods, sbl, eb2... First and second pressing spring wire rods, 11. 12... Engaging protrusion.

Claims (1)

[Claims for Utility Model Registration] A brake disc 1 that rotates together with the wheel; a bracket 2 that is fixed to the vehicle body adjacent to the brake disc 1;
A pair of left and right friction pads 4□, 4□ which are slidably supported by the bracket 2 in the axial direction of the brake disc 1 and can slide against both sides of the brake disc 1; and both friction pads 40, 4°. a brake caliper 3 that straddles the brake caliper 3 and is removably connected to the bracket 2 to operate both friction pads 4□, 42; Friction pad 4□
, 4□ against the bracket 2; and; the pad spring 6 includes first and second pressing spring wires extending in parallel to each other in the axial direction of the brake disc 1. 6b1
, 6b2, and left and right connecting spring wire rods 6a and 6c whose both ends are integrally connected to each left end and each right end of these pressing spring wire rods 6b1 and 6b2, respectively, into a frame shape,
Each of the connecting spring wire rods 6a, 6c has an engaging protrusion 11.12 in the axial direction of the brake disc 1 provided at the center thereof, and an intermediate portion between both ends thereof and the engaging protrusion 11.12 to the brake caliper 3. The first and second pressing spring wires 6b□, 6b2 are respectively locked to the friction pads 4□, and are prevented from falling off from the caliper 3.
Each of the pressing spring wires 6 is elastically pressed against one end and the other end of the 4° brake disc in the circumferential direction, respectively.
The connecting ends of b1, 6b2 and each connecting spring wire 6a, 6c are each connecting spring wire 6a. 6C. A disc brake device characterized in that the brake disc is formed in an arc shape that bulges outward in the axial direction of the brake disc.