JPH0117013B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disc brake pad clip.

In general, movable members such as calipers and friction pads in brake equipment are brought into contact with and engaged with a support, which is a vehicle body fixing member, through a predetermined surface of the support or an appropriate sliding device due to their sliding properties. Due to this relational structure, it is possible to prevent rattling caused by vehicle vibration, or to prevent the friction pad from hitting the support when it is dragged by the rotor when the brake is applied (so-called clunking noise). In order to prevent this, pad clips are often attached to the support to provide resilient engagement and elastic support between the movable members.

FIGS. 1A and 1B show an example, in which an ear portion 4 having a concave portion 5 that fits into the wing portion of the support 1.
Between the friction pad 3 and the caliper 2,
A pad clip 6 made of a wire spring material having the shape shown in the figure is inserted to apply a spring force so as to separate the caliper 2 and the friction pad 3. According to such a configuration, the friction pad 3
The lower arm of the concave portion 4 in the ear portion 4 is elastically attached to the support by the spring force, and the caliper is prevented from rattling because the elastic force is applied at the central protruding bent portion of the pad clip 6. However, this case had the following difficulties.

That is, the direction of the friction pad 3 dragged by the rotor when the brake is applied is the direction of the arrow in FIG. However, as the lining of the friction pads 3 wears out, and as the pair of opposing friction pads approaches each other, the engagement between the pad clip 6 and the friction pads 3 approaches the center. Therefore, a problem arises in that the biasing spring force inevitably decreases and changes.

The present invention has been made in order to solve these difficulties, and it is possible to stably obtain the spring force to prevent rattling of the caliper and to prevent rattling, which urges the friction pad, regardless of changes in wear of the lining. Moreover, the direction in which the spring force is applied to the friction pad is set to correspond to the rotational direction of the rotor so as not to cause movement due to dragging in the same direction. Specifically, the friction pad is fixedly attached to the rotor edge, and a support having pad support guide surfaces spaced apart from each other in the rotor axial direction, a pair of friction pads that face each other across a rotor that is supported by hooking left and right ears on these guide surfaces, and a rotor and friction pads. a caliper that is arranged to straddle the friction pads and press the friction pads against the rotor; and a wire spring material that is inserted between the friction pads and the side surface of the caliper and applies a spring force in the direction of separating them. In the disc brake, the pad clip includes a pair of opposing linear guide portions that extend in the axial direction of the rotor and engage and hold the ears of the friction pad so as to be movable in the axial direction of the rotor; This pad clip for a disc brake is characterized in that it is configured to include an engaging part that snaps into engagement with a caliper at both ends of each linear guide part.

The present invention will be described below based on embodiments shown in the drawings.

In FIGS. 2 to 4, 11 is a rotor;
Reference numeral 12 denotes an integral knuckle type support part that is integrally formed with the knuckle that supports the wheel, and extends in a bifurcated shape on one side of the rotor 11, and its tip is located outside the edge of the rotor 1. It crosses one side and extends to the other side. 13 is a caliper disposed so as to straddle the edge of the rotor; one of the opposing legs 14 and 15 has a built-in hydraulic cylinder device (not shown);
forms the reaction part. And this Calipa 1
3 is supported so as to be movable in the uniaxial direction of the rotor via a pair of pin-type sliding support devices 16 and 17 attached to the support portion 12 on the left and right sides.

These sliding support devices 16 and 17 are not directly related to the present invention, but in short, the sleeves 16b and 17b fixed by bolts 16a and 17a screwed to the support part 12 are connected to the boss openings 13a and 13a of the caliper 13. It is slidably fitted directly or via a rubber bush 18, and is provided so as to be sealed from the outside air by an appropriate boot.

Reference numerals 19 and 20 designate friction pads that are disposed opposite to each other with the rotor 1 in between, and ear portions 19a and 20a formed at the left and right upper corners, respectively, engage with the upper corner portions inside the opening of the support portion 12. The rotor is supported by the rotor and is provided so as to be movable in the uniaxial direction of the rotor.

The present invention is characterized by the shape and engagement relationship of the pad clip 21 inserted between the support portion 12, the caliper 13, and the pair of friction pads 19, 20 in the disc brake configured as described above. This relationship will be explained based on FIG. 5, which shows an enlarged view of this relationship.

The pad clip 21 made of a wire spring material in this example consists of a pair of opposing springs that are bent in a plane plane with the side surfaces 12a, 12a of the support portion 12 having a constant length in the rotor axial direction. The spring portions 21a, 21a are bent and extended from one end of the spring portions 21a, 21a so as to be parallel to the rotor axis in a direction approaching each other, and are formed on the inner side of the ear portions 19a, 20a of the friction pads 19, 20. A pair of opposing linear guide portions 21b, 21b that fit into the grooves 19b, 20b so as to be movable in the rotor axial direction, and proximal ends of the linear guide portions 21b, 21b are bent to form a loop. a first engaging portion 21c that is continuously connected to the left or right side surface of the caliper 13;
and second engaging portions 21d, 21d which are extended and bent from the other ends of the spring portions 21a, 21a and resiliently engage with the left or right side surface of the caliper 13, 5 is shown by the solid line in FIG. 5, when it is assembled to the disc brake, it is elastically deformed to the state shown by the broken line in the same figure, so that it is opposite to the caliper 13 and the friction pads 19, 20 in the rotor radial direction. (separate) so as to apply a spring force.

According to the pad clip having such a structure, the friction pads 19 and 20 on both the inner and outer sides can be commonly pressed by a single wire spring material, and the spring force is biased by the friction pads 19 and 20.
a pair of opposing linear guide portions 21b that engage with 20;
21b have first engaging portions 2 at both ends thereof, respectively.
1c and the second engaging portion 21d engage with the sides of the caliper 13 and support both ends of the caliper 13, so that the friction pad can always be stably obtained regardless of the movement position of the friction pad.Moreover, the pad clip 21 Since the engagement with the caliper 13 is performed at three positions spaced apart in the rotor axial direction, the posture of the pad clip 21 can be stabilized, and the pad clip 21 is not directly engaged with the support part 12. Therefore, it is extremely effective in a disc brake having an integral knuckle type support part, for example, where it is desirable to suspend the friction pads 19 and 20 from the caliper 13 and handle them as a subassembly body.

It should be noted that the pad clip 21 of the present invention is not limited to the shape shown in the drawings, but in short, by bending a single wire spring material, the pad clip 21 is engaged with a pair of friction pads separately and moved in the rotor axial direction. a linear guide portion for guiding the linear guide portion, and at least a pair of engaging portions on both sides and a central engaging portion and a spring bending portion, which generate an elastic spring force during assembly by engaging with the caliper on both sides of each linear guide portion. It is good as long as it is suitable, and its usefulness is extremely great.

[Brief explanation of drawings]

Fig. 1 shows a conventional pad clip, and Fig. 1 shows a partial perspective view illustrating its assembly relationship.
B is a front view of the same, FIGS. 2 to 5 show an embodiment of the present invention, FIG. 2 is a plan view of the disc brake, FIG. 3 is a front view, FIG. 4 is a rear view,
FIG. 5 is an exploded view of some parts for explaining the assembly relationship of the pad clip. 1: Support, 2: Caliper, 3: Friction pad, 4: Ear, 5: Recess, 6: Pad clip,
11: Rotor, 12: Support part, 12a: Side surface, 13: Caliper, 13a: Boss part opening, 1
4, 15: Leg portion, 16, 17: Sliding support portion, 1
8: Bush, 19, 20: Friction pad, 19
a, 20a: ear portion, 19b, 20b: recessed portion, 2
1: Padded clip, 21a: Spring part, 21b:
Linear guide part, 21c: first engaging part, 21d: second engaging part.

Claims (1)

[Scope of Claims] 1. A support that is fixed to the edge of the rotor and has pad support guide surfaces spaced apart from each other in the rotor axial direction, and a rotor that is supported by having left and right ears caught on these guide surfaces. a pair of friction pads facing each other with the two friction pads in between; a caliper disposed to straddle the rotor and the friction pads and press the friction pads against the rotor; and a caliper inserted between the two friction pads and the side surface of the caliper. In the disc brake, the pad clip is provided with a pad clip made of a wire spring material that applies a spring force in the separating direction to both of the friction pads. 1. A pad clip for a disc brake, comprising: a pair of opposing linear guide portions that engage in a hugging manner; and engaging portions that elastically engage with a caliper at both ends of each of the linear guide portions. 2. The pad clip for a disc brake as set forth in claim 1, wherein a total of three snap-fit engagement portions with the caliper are provided on both sides and in the middle of the pair of opposing linear guide portions.