JPS6148013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc brake having a pad rattling prevention mechanism, and more specifically, the spring that biases the pad is extremely easy to attach and detach, and even if the spring comes off for some reason, The present invention relates to a disc brake having a pad rattling prevention mechanism that prevents the pad from coming out of a predetermined position.

2. Description of the Related Art A type of disc brake that suppresses rotation of a rotating disc rotor by pressing a pad supported by a non-rotating member against the rotating disc rotor is widely used. In this type of brake, the pads must be supported by a non-rotating member so that they can move in a direction perpendicular to the plate surface of the disc rotor. Alternatively, there is a device in which the pad slides on a guide surface provided by machining a non-rotating member, which is widely used.

However, this type of brake is used in applications where vibration is unavoidable (e.g. for vehicles).
This has the disadvantage that the pads rattle. Conventionally, in order to prevent this rattling, a spring (hereinafter referred to as an anti-rattle spring) to prevent rattling has been installed between the pad and a non-rotating member or above the pad.
The pad is always biased in a direction perpendicular to its direction of movement.

However, in such conventional rattle prevention mechanisms, those in which the anti-rattle spring is disposed between the pad and the non-rotating member have the problem that the shape of the anti-rattle spring becomes complicated, and In the case of a type in which an anti-rattle spring is disposed in the anti-rattle spring, there is a problem that attaching and detaching the anti-rattle spring is extremely troublesome due to the lack of a superior method for fixing the anti-rattle spring.

The present invention has been made against the background of the above, and the gist thereof is to provide a disc brake as described above, in which a disc brake is provided at a predetermined distance from the sides of the inner pad and outer pad to the outer periphery of the disc rotor. A spring support body having a free end located at the same position is fixed to a non-rotating member, and a spring formed into a predetermined shape from a single elastic wire is fixed to the spring support body fixed to the non-rotating member. A pad rattling prevention mechanism is provided in which the pads are engaged and supported, and a portion of the spring is stretched over surfaces located on the outer peripheral side of the disk rotor on the sides of both pads to press these pads against the non-rotating member. As a result, rattling of the two pads can be effectively suppressed, and the two pads can be completely prevented from coming off due to vibration, etc., with a double mechanism, and such rattling can be prevented. The structure of the mechanism is simplified, and the spring, which is a component of the mechanism, is extremely easy to attach and detach, making assembly, repair, and inspection operations easier.

Below, based on the drawings showing one embodiment of the present invention,
It will be explained in further detail.

1 to 3, a mounting bracket 1, which is a non-rotating member fixed to another stationary member, has a surface 1a parallel to the plate surface of a rotating disk rotor 2 and a surface 1b perpendicular to it. A pair of slide pins 1c are vertically provided on a surface 1a of the disc rotor 2, which is parallel to the plate surface, at a predetermined interval. The caliper 3 is generally saddle-shaped as a whole, and a pair of arm portions 3a protruding from both sides of one hanging portion are formed with a fitting hole (not shown) for fitting with the slide pin 1c. Moreover, a piston 3b is built into the hanging portion. The other hanging portion is a claw portion 3c facing the piston 3b.
is formed. Then, by slidably fitting the slide pin 1c of the mounting bracket 1 into the fitting hole of the caliper 3, the caliper 3 is mounted on the mounting bracket 1 while straddling the disc rotor 2. There is. There are inner pads 4 on both sides of the disc rotor 2.
By supporting the rectangular shoulders 4a and 5a on the surface 1b of the mounting bracket 1 via the anti-rust plate 6, the outer pad 5 is arranged vertically to the plate surface of the disc rotor 2. It is held movable in the direction.

According to the present invention, a spring support 7 is provided on the surface 1b that supports both shoulders 4a, 5a of the pads 4, 5 of the mounting bracket 1.
A rattling prevention mechanism 9 for the pads 4 and 5 is provided, which includes a spring 8 and a spring 8.

As shown in FIGS. 1 and 2, the spring support 7 is attached to the surface 1 of the mounting bracket 1.
b by a known fixing means such as welding or screwing, and has a fixed end 7a in the form of a longitudinal plate, and a spring 8 at both ends parallel to the moving direction of both pads 4 and 5. It has a pair of ears 7b to prevent it from jumping out upwards (in FIG. 1), and has a certain gap between it and the shoulders 4a and 5a of both pads 4 and 5, and is placed above the shoulders 4a and 5a, that is, the disk. A free end 7c located on the outer circumferential side of the rotor 2 and having a longitudinal plate shape rises from one end in the width direction of the fixed end 7a toward one end in the width direction of the free end 7c to connect them. spanned over the connecting portion 7d, the free end portion 7c, and the fixed end portion 7a,
It is composed of two spring engaging parts 7e with a gap 7f (see FIG. 6) formed between them and the connecting part 7d.

Further, the spring 8 includes an acting part 8a, a first connecting part 8b, an abutting part 8c, a second connecting part 8d, and an engaging part 8e, which are formed by bending a single elastic metal wire. The acting portion 8a is configured to abut on the upper surface of the shoulder portions 4a, 5a of both pads 4, 5, that is, the surface located on the outer peripheral side of the disc rotor 2, on the free end 7c side of the spring support 7, respectively. The pair of first connecting portions 8b extend from both ends of the acting portion 8a to the fixed end portion 7 of the spring support 7, respectively.
They are bent at a substantially right angle toward the a side and each have the same length. Further, the pair of abutting portions 8c are bent approximately at right angles from the tips of the respective first connecting portions 8b toward the center of the spring support 7 (so as to face each other and approach each other) on the fixed end portion 7a. The fixed end 7 of the spring support 7 is formed with substantially the same length by being
It is brought into contact with the upper surface of the side a, that is, the surface of the fixed end portion 7a on the side opposite to the side to which the mounting bracket 1 is attached. Furthermore, each contact portion 8
A pair of second connecting portions 8d each continuing from c are bent at a substantially right angle from the tip of each contact portion 8c toward the free end portion 7c of the spring support 7, and each has substantially the same length. ing.
A pair of engaging portions 8e having approximately the same length are formed by bending the tip of each of the second connecting portions 8d at a substantially right angle toward the first connecting portion 8b parallel to the acting portion 8a. , the engaging portions 8e are the spring engaging portions 7e of the spring support body 7, respectively.
The spring 8 can be installed by being inserted into the gap 7f and engaged. Since the spring 8 has such a shape, it has a symmetrical shape with respect to a plane perpendicular to the axis of the acting portion 8a at the central portion in the longitudinal direction.

Therefore, in such a combination of the spring support 7 and the spring 8, the spring 8 has its action portion 8 as shown in FIGS.
a is pushed upward by the thickness of the shoulders 4a and 5b of the pads 4 and 5, that is, toward the outer circumferential side of the disc rotor 2, thereby connecting the first connecting portion 8b of the spring 8 and the mounting bracket 1. Since the spring support 7 is attached so that the angle formed by the surface 1b is larger than the angle formed by the second connecting portion 8d and the surface 1b, the shoulder portions 4a, 5a of the pads 4, 5 is constantly biased in the direction perpendicular to the surface 1b by the acting portion 8a of the spring 8, and therefore, due to this biasing action,
Rattling of the pads 4 and 5 can be effectively prevented. In addition, even if the spring 8 comes off from the spring support 7 due to severe vibrations, etc., there is a predetermined position above the shoulders 4a, 5a of the pads 4, 5, that is, on the outer circumferential side of the disc rotor 2. Free end 7c of spring support 7 with a gap
, the pads 4 and 5 are prevented from moving upwards and do not move out of their predetermined positions. As a result, even if the spring 8 loses its movement-suppressing effect on the pads 4, 5, it is possible to prevent the pads 4, 5 from coming out of their braking positions and preventing the brake from operating. It can be done.
The spring 8 can be attached to and removed from the spring support 7 by engaging appropriate tools with the two second coupling parts 8d of the spring 8, respectively.
d to move the engaging portion 8e of the spring 8 toward the spring support 7 by moving them away from or approaching each other.
This can be done extremely easily by engaging or disengaging the spring engaging portion 7e.

Furthermore, in the brake operation of the illustrated device, braking fluid is supplied into the cylinder and the piston 3b is moved forward, causing the inner pad 4 to come into sliding contact with one side of the disc rotor 2. is moved in the opposite direction to the direction of movement of the piston 3b, and the outer pad 5 is brought into sliding contact with the other side of the disc rotor by the claw portion 3c. Since it is similar to a conventional disc brake, the explanation will be omitted here.

It should be noted that the above embodiment is merely an example of the present invention, and is not intended to limit the invention in any way. Of course, various changes and improvements can be made based on the knowledge of the manufacturer. For example, unlike the above example, by using an asymmetrical spring 8' as shown in FIG. 4, different biasing forces can be applied to the inner pad and the outer pad, and the spring 8' as shown in FIG. The engaging portions 7e'' formed on the support body 7'' may be made into one, and the engaging portions 8e'' of the spring 8'' may be inserted and engaged from both sides of the single engaging portion 7e''. It can be done.

As detailed above, according to the present invention, rattling of the inner pad and the outer pad can be prevented at the same time using one spring, and the spring can be attached and detached extremely easily. Even if the spring were to come off, the presence of the spring support (the arrangement of the free end) will prevent the inner and outer pads from coming off their predetermined positions. It also has the great advantage of preventing the risk of losing the benefits.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a plan view thereof. FIG. 3 is a - sectional view in FIG. 1. FIG. 4 is a plan view showing a rattling prevention mechanism (spring and spring support) according to another embodiment of the present invention;
FIG. 5 is a diagram corresponding to FIG. 4 of still another embodiment. FIG. 6 is an enlarged side view of the spring support in FIG. 1. 1: Mounting bracket, 2: Disc rotor, 3: Caliper, 4: Inner pad, 5:
Outer pad, 4a, 5a: Shoulder, 6: Rust prevention plate, 7, 7', 7'': Spring support, 7a: Fixed end, 7c: Free end, 7d: Connecting part, 7e:
Spring engaging part, 8, 8', 8'': Spring,
8a: acting part, 8b: first connecting part, 8c: contacting part, 8d: second connecting part, 8e: engaging part, 9,
9′, 9″: Rattling prevention mechanism.

Claims (1)

[Scope of Claims] 1. A disc brake of a type in which an inner pad and an outer pad, each supported by a non-rotating member, are brought into sliding contact with both sides of a rotating disc rotor to suppress rotation of the disc rotor, comprising: It has a fixed fixed end portion and a free end portion located a predetermined distance away from the sides of the pads toward the outer periphery of the disk rotor, and has an intermediate portion between the fixed end portion and the free end portion. a cantilever-like spring support body having a spring engagement portion; an acting portion that presses the side portions of both pads inwardly; a pair of first connecting portions bent from both ends of the acting portion toward the fixed end of the spring support; and each of the first connecting portions. a pair of contact parts bent in a direction toward each other from the tips of the parts and brought into contact with a surface of the fixed end located on the outer peripheral side of the disk rotor; a pair of second connecting portions that are bent toward the free end side of the spring support; and a pair of second connecting portions that are bent from the tips of the second connecting portions in parallel to the acting portion and engaged with the spring engaging portion of the spring support. a spring curved from a piece of elastic wire including a pair of engaging parts that are brought together;
A disc brake characterized in that a pad rattling prevention mechanism including a pad rattling prevention mechanism is disposed on each side of both pads.