JPS5849737B2 - Vehicle disc brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc brake device for a vehicle, and particularly to a pair of friction pads slidably supported on both sides of a brake disc by support members parallel to the axis of rotation of the brake disc; A brake caliper comprising a pair of arms that straddle the friction pad in the direction of the rotational axis of the brake disc, and a bolt that separably connects the two arms, and has a function of pressing the friction pad against both sides of the brake disc. It relates to a type in which a pad spring is interposed between.

Conventionally, in the above-mentioned type of disc brake device, a pad spring is interposed between the friction pad and the brake caliper, and the elastic force of the spring suppresses the blind movement of the friction pad, so that the friction pad does not move when the brake is not applied. It is known to prevent unnecessary contact between brake discs.

However, in such conventional devices, when the friction pad is removed to replace a friction pad whose lining has worn out, the pad spring easily falls off from the brake caliper and is easily lost. Is it troublesome and time-consuming to set it correctly in the specified position?
There are some drawbacks.

The present invention has been proposed in view of the above, and is capable of solving the drawbacks of the conventional device by independently and reliably locking and fixing a pad spring to a brake caliper. It is an object of the present invention to provide a disc brake device for a vehicle with a simple structure, which can be assembled extremely easily by using the joining surfaces of the both arms of the caliper.

In the disc brake device of the above type, the present invention provides a locking groove in both arms of the brake caliper having a narrowing opening that passes through the connecting surface thereof and opens toward the friction pad; It is characterized in that the pad spring is provided with an eye-shaped elastic attachment portion that is fitted into the locking groove from the connecting surface of the both arms.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. The illustrated example is a disc brake device for a motorcycle, where F is a front fork of the motorcycle, and D is a brake disc that rotates together with the front wheel supported by the front fork F. , C indicates a brake caliper.

The brake caliper c is constructed by integrally connecting a pair of arms 1 and 1' that straddle a part of the outer circumference of the brake disc D on the left and right sides with bolts 3 and 3 at their base ends. The brake caliper C is fixed to the front fork F via a mounting arm 1a extending to one side of the brake caliper.

Both arm bodies 1, 1' have hydraulic cylinders 4, which are parallel to the axis of rotation of the brake disc D and open on the inner surface of each arm body 1, 1b.
4', and the hydraulic cylinders 4, 4' have pistons 5, 5 facing each other with a brake disc D placed between them.
Furthermore, friction pads 6, 6 are interposed between the pistons 5, 5' and the brake disc D, respectively, so that they slide together.

The friction pads 6, 6' are equipped with backing metals 6a, 5a' that come into contact with the adjacent pistons 5, 5', and each pair of metal backings 6a, 5a' is provided with a hole in each upper end portion of the backing metals 6a, $a'. The brake disc D is suspended from two support pins 8 and 8' parallel to the rotational axis of the brake disc D through the through holes 7 and 7; Can be detachably attached.

Both ends of the back metals 6a, 5a' of the friction pads 6, 6' are respectively bent toward the back and formed into contact portions 9, 9; 9', 9'; , 9' are braking torque receiving grooves 10, 1 recessed in the inner surfaces of the corresponding arm bodies 1, 1'.
0; engaged with 10' and 10', respectively.

A pad spring 11 is interposed between the ceiling wall of the flake caliper C, that is, the joint base of both arm bodies 1 and 1', and the upper end surfaces of the friction pads 6 and 6 and the back metals 6a and 6a'.

The pad spring 11 is composed of a leaf spring, and has an elastic mounting part 11a bent in the shape of an eyeball at one end, and a pair of left and right elastic presses branched into three prongs and bent in a U-shape at the other end. The elastic mounting portion 11a is fitted into a locking groove 12 having a constricted opening recessed in the inner surface of the ceiling wall of the brake caliper C. a pair of elastic pressing parts 1lb,
1lb' are pressed against the center portions of the upper end surfaces of the back metals 6a and sa', respectively.

The locking groove 12 is connected to both arms 1, 1' of the brake caliper C.
The elastic attachment portion 11a is fitted into the groove 12 through the coupling surface when the arms 1 and 1' are coupled.

In the same figure, 13.13' is the elastic pressing portion 11b, 11b.
' is a hole drilled in order to soften their elasticity, and 14 is an oil hole in brake caliper C. A pressure oil inlet port 15' communicates with both hydraulic cylinders 4, 4' and is connected to a well-known brake mask cylinder (not shown), and 16 is an air vent plug.

Next, the operation of this embodiment will be explained. When the brake is not in operation, the friction pads 6, 6' are held in place by the support pins 8, 8, respectively, by the elastic force of the suppressing parts 1lb, 11b' of the pad spring 11. Therefore, it will not move blindly even if it is subjected to vibrations while the vehicle is running.

If pressure oil is simultaneously supplied to both hydraulic cylinders 4, 4' by the operation of a brake mask cylinder (not shown), the pistons 5, 5' move forward due to the hydraulic pressure, and both friction pads 6, 6
' are pressed onto each opposing side surface of the brake disc D to brake it.

At this time, the braking torque transmitted from the brake disc D to the friction pads 6, 6' is transmitted to the brake caliper C via the contact portions 9, 9:9', 9' of the respective back metals 6a, 6a'.
The braking torques 10, 1o; 1o', 10' are supported by the side walls of the supporting pins 8, 8, and the burden of the braking torque is not applied to the support pins 8, 8.

If the linings of the friction pads 6, 6' are worn out,
When the support pins 8, 8 are pulled out from the brake caliper C, the friction pads 6, 6' are inserted into the respective braking torque receiving grooves 10, 10;
They can be easily taken out of the brake caliper C along the lines ', 10', and new friction pads 6, 6' can be installed in the opposite manner to the above.

By the way, the elastic attachment part 11a of the pad spring 11 cannot be removed from the locking groove 12 unless the arms 1 and 1' of the brake caliper C are separated.
' will not fall off from the brake caliper C when it is removed.

As described above, according to the present invention, a pair of friction pads are slidably supported by support members on both sides of a brake disc in parallel with the rotational axis of the brake disc, and both friction pads are connected to the rotation of the brake disc. A pad spring is disposed between a pair of arms extending in the axial direction and a brake caliper having a function of pressing the friction pad against both sides of the brake disc, which is comprised of a bolt that connects the arms in a separable manner. In the interposed vehicle disc brake device, the pad spring can be independently locked and fixed to the brake caliper, which prevents the pad spring from falling off and getting lost even when the friction pad is removed, making it easier to replace the friction pad. To prevent unnecessary contact with a brake disc due to blind movement of the friction pad by being able to perform the process quickly, without causing the pad spring to jump while the vehicle is running, and by always accurately pressing and holding the friction pad. Can be done.

In particular, in the present invention, locking grooves are provided in both arms of the brake caliper having narrow openings that pass through their connecting surfaces and open toward the friction pad, while the pad springs are provided with locking grooves in both arms of the brake caliper. Since the eye-shaped elastic attachment part is provided which fits into the locking groove from the coupling surface, unless the arms are separated, the eye-shaped elastic attachment part of the pad spring will have a constricted opening on the pad side. There is no possibility that the elastic mounting part will accidentally slip out of the locking groove, and therefore there is no need to provide any special means for preventing the elastic mounting part from slipping out, and the structure is simple.

Furthermore, when the arms are separated, the locking groove can be opened widely on the joint surface thereof, so that the eye-shaped elastic attachment portion can be fitted smoothly and effortlessly into the locking groove through the opening. When the pad spring is fitted, there is almost no need to compress and deform the elastic mounting portion, which has a relatively strong spring force, and as a result, the work of assembling the pad spring to the caliper can be done extremely quickly and easily. be.

[Brief explanation of drawings]

The drawings show one embodiment of the device of the present invention, and FIG. 1 is a side view, FIG. 2 is a sectional view taken along line 1 and 2 in FIG.
4 is a sectional view taken along the line IV--IV in FIG. 3, and FIGS. 5A and 5B are front and side views of the pad spring. 1, 1'... Arm body, 3, 3... Bolt, 4, 4'.
...Hydraulic cylinder, 5.5'...Piston, 6.
6'...Friction pad, 8...Support pin, 11...Pad spring, 11a...Elastic mounting part, 1lb, 1
lb<...elastic pressing part, 12...locking groove, C...brake caliper, D...brake disc.

Claims (1)

[Claims] 1 A pair of friction pads that are slidably supported on both sides of a brake disc by support members parallel to the rotational axis of the brake disc, a pair of arms that straddle these friction pads in the direction of the rotational axis of the brake disc, and A vehicular disc brake device in which a pad spring is interposed between a brake caliper, which is comprised of bolts that separably connect the arms and has a function of pressing the friction pads on both sides of the brake disc, A locking groove having a constricted opening that passes through the connecting surfaces of the arms and opens toward the friction pad is provided in the both arm bodies, and the locking groove is provided in the pad spring from the connecting surface of the both arm bodies. A disc brake device for vehicles equipped with an eye-shaped elastic mounting part that fits into a groove.