JPS5840357Y2 - Vehicle disc brake device - Google Patents

Description

[Detailed description of the invention] This invention consists of attaching a pair of brake pads facing each other with a brake disc in between, and attaching each backing plate to a backing plate.
Slidingly engages on each pair of guide rails of a brake bracket fixed to the vehicle body across the brake disc,
Furthermore, an inverted U-shaped brake caliper is removably connected to the brake bracket, and a hydraulic cylinder Noviston provided on one leg of the brake caliper is brought into contact with the back of one backing plate.
The present invention relates to a vehicle disc brake device in which the other leg piece is brought into contact with the back surface of the other backing plate.

Generally, in this type of disc brake device, a spring plate is interposed between the brake caliper and each backing plate, and each backing plate is pressed onto a guide rail to stabilize each backing plate and therefore a pair of opposing brake pads. However, when the brake caliper is removed for brake pad replacement or inspection, there is a risk that the spring plate may fall off and be lost.

The present invention firmly attaches the covering spring plate to the backing plate to reliably prevent it from falling off, and also allows the spring plate to be easily attached to and removed from the backing plate when replacing brake pads. , an object of the present invention is to provide the disc brake device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a brake bracket that is attached to the vehicle body through the left and right through holes 3, 3 at the bottom, straddling the brake disc 2 that rotates with the wheels. Guide rails 5, 5; 6, 6, which are located on both sides of the brake disc 2 and face each other, are provided on both sides of the recessed part 4 formed in the brake disc 2 in the left and right front and rear.

Reference numeral 7.8 denotes brake pads facing each other with the brake disc 1 in between, and these are respectively attached to backing plates 9 and 10 on the back side, and each backing plate 9 and 1o is attached to both side edges 9a and 9a.
and the guide rails 5, 5 in 10a, 10a;
6, 6 in a slidable manner.

And an inverted U-shaped brake caliper 11 is placed in the recessed part 4.
A hydraulic cylinder 1 is provided on the leg piece 11a on one side of the hydraulic cylinder 1.
The second piston 12a is brought into contact with the back surface of one backing plate 9, and the leg piece 11b on the other side is brought into contact with the back surface of the other backing board 10.

The brake caliper 11 has a leg piece 11a on one side that protrudes left and right to form protrusions 11c and 11d, and through holes 13 and 13 are provided therein. Insert the brake bracket 1
It is inserted into the through holes 15, 15 on both sides of the shaft and screwed into the ends of the shaft rods 16, 16.

A cylindrical elastic member 17 is interposed between each shaft rod 16, 16 and each through hole 15, 15, and further between a portion of each shaft rod 16° 16 protruding from the brake bracket 1 and the brake bracket 1. A telescopic boot 18 is interposed between the two, and a lubricant is sealed inside.

A protrusion 20 is formed at the center of the end surface of each back plate 9, 10 facing the bottom of the brake caliper 11, and the back surface of each protrusion 20 is recessed from the back surface of each back plate 9, 10. , whereby a recessed portion 30 is formed.

In the illustrated example, the rear surface of each protrusion 20 is strongly pressed and plastically deformed to cause the front side of each protrusion 20 to protrude toward the front side of each backing plate 9, 10, and a concave portion 30 is provided.

19.19 is the brake caliper 11 and each backing plate 9.10
A pair of tongue pieces 19a that elastically sandwich the protruding parts 20 of the backing plates 9 and 10 on both sides of the central part of the spring plates 19 and 19. , 19b are provided in a protruding manner, and a hemispherical convex portion 19c is bulged inward from one tongue piece 19a located in the concave portion 30 of each protruding portion 20. It is engaged with the edge of the hole 20a.

In this case, one of the tongue pieces 19a is bent substantially perpendicularly to the spring plate 19.19, so that it fits within the recessed part 30, so there is no need to form a concave relief on the inner surface of the leg piece 11b. The rigidity of the brake caliper 11 is not impaired.

Further, since the other tongue piece 19b bulges outward, its elastic force ensures that the convex portion 19C and the concave portion 20a are engaged with each other.

In the properly assembled state, the spring plate 19 is pushed upward by both sides of the bottom of the brake caliper 11 and the protrusion 20, and the repulsive force causes the corresponding backing plate 9,1 to be bent upward.
0 both side edges 9a, 9a; 10a.

10a is evenly pressed against the guide rails 5, 5; 6, 6.

Reference numeral 21 designates a through hole for inspection of the brake pad 7.8 provided on the upper part of the brake caliper 11.

Further, 22 is a recess formed on the inner surface of the caliper leg piece 11b to reduce the cutting area, and in reality, its depth is very large so as not to impair the rigidity of the caliper leg piece 11b. It is shallowly provided and its dimensions are indefinite.

Next, the operation of this embodiment will be explained.

Now, in FIG. 3, when pressure oil is supplied into the hydraulic cylinder 12, the piston 12a protrudes to the left and presses the backing plate 9, so the backing plate 9 moves forward guided by the guide rails 5, 5 on both sides. , the brake pad 7 is first pressed against the brake disc 2, and as a reaction, the brake caliper 11 moves to the right and its leg 11b presses the backing plate 10, so that the backing plate 10 is pressed against the guide rail 6.6. The brake pad 8 is brought into pressure contact with the brake disc 2, and eventually the brake disc 2 is clamped with equal pressure by the left and right brake pads 7.8 and braking is applied, and the braking torque is applied to the brake pad. 7.8 directly to the brake bracket 1, and has almost no effect on the brake caliper 11.

Therefore, when the brake caliper 11 is moved, the left and right shaft rods 16, 16 are not subjected to lateral pressure and the through holes 15, 15
It can slide smoothly inside.

Next, when replacing or inspecting the brake pad 7.8, the brake pad 7.8 is removed in the following manner.

First, the bolt 14 is removed from one shaft 16, and then the brake caliper 11 is rotated upward about the other shaft 16 as shown by the chain line in FIG.

Thus, the brake pads 7.8 are exposed on the upper surface of the brake bracket 1, so that they can be easily taken out upwards.

At this time, the spring plates 19, 19 have a pair of tongue pieces 19a, 1
The elastic clamping force of the brake pads 9b and the uneven engagement force of the convex portions 19c and the concave portions 20a bind them to the backing plates 9, 10 of the brake pads 7.8, respectively, so that they do not fall off.

Thereafter, the spring plate 19 can be easily separated from each backing plate 9, 10 by pulling it up against the elastic clamping force of the pair of tongue pieces 19a, 19b and the uneven engagement force between the convex part 19c and the concave part 20a. In addition, when attaching the spring plate 19, when the pair of tongue pieces 19a * 19b are pushed into the protrusion 20 using elasticity, the protrusion 19c engages with the recess 20a, and the backing plate of the spring plate 19 is pressed. Positioning for 9 and 10 is performed.

As described above, according to the present invention, a protrusion 20 whose back surface is recessed more than the back surface of each backing plate 3, 10 is formed at the center of the end surface of each backing plate 9, 10 facing the brake caliper 11. A pair of tongue pieces 19a and 19b are protrudingly provided on both sides of the central part of the splash plate 19 to elastically clamp the protrusion 20,
Since the protrusion 19c bulging inwardly of one of the tongues 19a is engaged with the recess 20a formed in the protrusion 20, when the brake caliper 11 is removed, each spring plate 1
Each of the backing plates 9, 1
The spring plates 19 are securely held in the protruding portions 20 of 0, and therefore, it is possible to prevent problems such as each spring plate 19 falling off and being lost.

When replacing the brake pads 7.8, the spring plate 19 is held together by the elastic clamping force of the pair of tongues 19a, 19b and the convex portion 19.
It can be easily separated from each of the backing plates 9 and 10 by pulling up against the engagement force of the recesses and recesses 20a.
Also, when installing the spring plate 19, a pair of tongue pieces 19a,
19b can be pushed into the protruding part 20 using its elasticity, whereby the protruding part 19c engages with the recessed part 20a and the spring plate 19
can be easily positioned with respect to the backing plates 9, 10.

Furthermore, the protruding portion 20 on which the pair of tongue pieces 19a, 19b are clamped has its back surface recessed more than the back surface of the backing plate 9°10 that faces the caliper leg piece 11b and the piston 12aK, so that Tongue piece 19a that is held and accommodated
Therefore, the inner surface of the caliper leg piece 11b and the front face of the piston 12a are provided with a relatively deep concave shape to avoid interference with the tongue piece 19a. It is no longer necessary to provide a special relief for the caliper 11, which prevents a decrease in the rigidity of the caliper 11 and reduces the number of man-hours required for machining the leg piece 11b and the piston 12a. Since the side surfaces and the front surface of the piston 12a can be brought into substantially even contact, the respective friction pads 7.8 can be moved in parallel during braking, and their entire surfaces can be brought into contact with the brake disc 2 substantially evenly.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a vertical sectional front view, FIG. 2 is a partially vertical plan view thereof, and FIGS. IV and V-■ line sectional view,
6 is a sectional view taken along the line Vl-VI in FIG. 4, and FIG. 7 is a partial perspective view of the spring plate. 1... Brake bracket, 2... Disc brake, 5.6... Guide rail, 7
．． 8...Brake pad, 9,10...
・Backing plate, 11...Brake caliper, 11a
, 11b...Leg piece, 12...Hydraulic cylinder, 12a...Piston, 19...
Spring plates, 19a, 19b... tongue pieces.

Claims (1)

[Scope of utility model registration request] A pair of brake pads 7 and 8 facing each other with the brake disc 2 in between are attached to backing plates 9 and 10, respectively, and each of the backing plates 9 and 10 is fixed to the vehicle body across the brake disc 2. Each guide rail "5t5 facing each other on both sides of the brake disc 2"
6t6, and the piston 12a of the hydraulic cylinder 12 provided on the leg piece 11a on one side of the brake bracket 1K is brought into contact with the back surface of one of the backing plates 9; An inverted U-shaped brake caliper 11 whose leg piece 11b is in contact with the back surface of the other backing plate 10 is detachably connected, and a brake caliper 11 is provided between each backing plate 9, 10 and the brake caliper 11. Each backing plate 9, 10 is stabilized by pressing it against each guide 1/-/115,5; At the center of the end surface facing the brake caliper 11, the back side is attached to each backing plate 9, 10.
A pair of tongue pieces 19a and 19b are provided on both sides of the central part of the spring plate 19 to elastically sandwich the protrusion 20, and one of the tongues Piece 1
The protrusion 19c bulged inward of the protrusion 9a is connected to the protrusion 20.
A disc brake device for a vehicle, which is engaged with a recess 20a formed in a disc brake device.