JPH0223872Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a retainer/pad spring for a disc brake device for vehicles, and has a function of protecting the guide part and a function of pressing and holding the friction pad toward the center of the disc. This relates to a retainer and padded spring that also functions as a retainer and a padded spring.

[Conventional technology]

In conventional vehicle disc brake devices, a retainer is interposed between the guide part of the bracket and the friction pads to protect the torque receiving part and to ensure smooth sliding of the friction pads in the disc axial direction during braking. ing. Furthermore, a pad spring is separately provided above the friction pads to press the friction pads toward the center of the disc, to prevent the friction pads from wobbling during driving, and to prevent the friction pads from floating, which may occur during braking. However, since the retainer and pad spring are formed separately, the manufacturing cost increases, the number of parts increases, and it takes time to assemble. Various types of retainers and pad springs are available that have both the functions of a retainer and a pad spring and are free from the above-mentioned problems.

[Problem that the invention attempts to solve]

However, since the conventional retainer/pad spring is made of a thin steel plate, the friction pads may rattle due to vibrations during running or lifting during braking.

Therefore, the object of the present invention is to provide a retainer and pad spring for a vehicle disc brake device that has a force that returns the friction pads in the direction opposite to the disc and does not cause deformation due to vibration or lifting. It is said that

[Means for solving problems]

In the present invention, as a means to solve the above problems, a pair of friction pads are arranged on both sides of a disk that rotates together with the wheel, and a guide section supports the friction pads so that they can slide in the disk axial direction. In the disc brake device for a vehicle, the retainer and pad spring is interposed between the bracket and the friction pad and presses the friction pad toward the center of the disc. A pair of retainer pieces covering the guide portion of the pad and connected by a connecting piece, and a pair of pad pressing pieces each having a vertical portion and a horizontal portion continuous thereto and pressing the friction pads independently. A pad is connected by a loop portion at a position offset from the center of the piece toward the disk side, and a hanging part is formed on the side of the connecting piece, rising from the connecting piece and extending across the vertical part of the pad pressing piece and at a predetermined distance from the horizontal part. The invention is characterized by the provision of a tongue piece for regulating the movement of a pad press piece having a portion.

[Effect]

With the structure described above, the tongue piece suppresses excessive deformation of the retainer/pad spring, especially the pad pressing piece, and prevents deformation due to vibration or lifting.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

The disc brake device includes a bracket 2 fixed to the vehicle body on one side near a disc 1 that rotates together with the wheels. Parts 4 and 4 straddle disk 1. A pair of left and right guide portions 5, 5 are formed in a step-like manner on opposing surfaces of these arm portions 3, 3, respectively, in the disk axial direction.

The caliper 6 is located on one side of the disc 1 and has an actuating part 9 with a piston 8 in a cylinder 7, and a counter-acting part 10 located on the other side of the disc 1. Slide pins 12, 12 fixed to the brackets 11, 11 are slidably inserted into the arm portions 3, 3 of the bracket 2, so that the slide pins 12, 12 are movable relative to the bracket 2 in the disk axial direction.

Further, friction pads 15 and 16 having back plates 13 and 14 are arranged on both sides of the disk 1, and the back plates 13 and 14 are provided with ears 17 and 18 formed on both left and right sides of the back plates 13 and 14, respectively, to prevent the bracket 2 from sliding. guide part 5,
5 through retainer/pad springs 19, 19 so as to be slidable in the disk axial direction.

This retainer/pad spring 19 is made of a wear-resistant elastic steel plate such as stainless steel, and as shown in FIG.
The upper part is connected with the guide part 5 of the bracket 2,
A pair of retainer pieces 21, 21 covering the disk 5, and pad pressing pieces 22, 22, which are independent on the operating part side and the non-actuating part side of the caliper 6, and press and hold the friction pads 15, 16 toward the center of the disk. Loop portions 23, 23 connecting the pad pressing pieces 22, 22 and the retainer pieces 21, 21, and the connecting piece 20
It has tongue pieces 24, 24 extending on the sides of the pad and regulating the movement of the pad pressing pieces 22, 22.

The retainer pieces 21, 21 have horizontal portions 21a, 21 which the lower portions of the ears 17, 18 of the back plates 13, 14 abut.
Holding parts 21b, 21b are formed on one side of a to engage the protrusions 5a, 5a projecting outward from the guide parts 5, 5 of the bracket 2, and guide parts 21c, 21c are formed on the connecting piece 20 side, respectively. has been done.

The pad pressing pieces 22, 22 have horizontal parts 22a, 2 which the upper parts of the ears 17, 18 of the back plates 13, 14 contact.
2a, and vertical portions 22b, 22b rising from the ends of the horizontal portions 22a, 22a, and the retainer piece 2 is provided on one side of the horizontal portions 22a, 22a.
When assembling the friction pads 15, 16 together with the guide parts 21c, 21c of 1, 21, the back plates 13, 14
Guide parts 22c, 2 that guide the ears 17, 18 of
2c are provided, and the pad pressing pieces 22, 22 and the retainer pieces 21, 21 are connected to each pad pressing piece 22, 2c.
They are connected by loop portions 23, 23 at a position deviated toward the disk 1 side, which is inside the center of the disks 2.

The loop portions 23, 23 are arranged in a space between the bracket 2 and the caliper 6, and are formed in a loop shape so as to obtain sufficient pad pressing force. The load from 15 and 16 is alleviated by the spring action.

A tongue piece 24 extending from the side of the connecting piece 20
is a rising portion 24a rising from the connecting piece 20 and a horizontal portion 24 that straddles the vertical portion 22b of the pad pressing piece 22.
b, and the tip is the horizontal part 22 of the pad pressing piece 22.
A hanging part 24c that hangs upward and is parallel to the vertical part 22b is integrally bent, and there is a slight gap between the hanging part 24c and the horizontal part 22a and vertical part 22b of the pad pressing piece 22. A gap is provided.

And this retainer and padded spring 19
are set on the bracket 2 on both sides of the friction pads 15, 16, and the retainer pieces 21, 21 closely fit and cover the guide parts 5, 5. In this assembled state, the horizontal portion 21 of the retainer pieces 21, 21
The protrusions 5a, 5a of the guide parts 5, 5 engage with the clamping parts 21b, 21b connected to the clamping parts 21b, 21a, and the locking part 20a of the connecting piece 20 engages with the bridge part 4 of the arm part 3.
The retainer and pad spring 1 engages with the inner wall.
9 is fixed.

Therefore, the retainer and padded spring 19 is
At the position where the pad pressing pieces 22, 22 are deviated toward the disk 1 side, the retainer piece 2 is held by the loop parts 23, 23.
1, 21, during braking, the back plates 13, 14 of the friction pads 15, 16 are strongly pressed by the pad pressing pieces 22, 22 on the disk side ends, which causes the friction pads 15, 16 to 16 is pushed back in the direction of separating it from the disk 1, and when the brake is released, the piston 8 moves toward the piston seal 2.
At the same time, the friction pads 15, 16 return to their predetermined positions due to the pressing force of the pad pressing pieces 22, 22.

In addition, since the tongue pieces 24, 24 are extended on the sides of the connecting piece 20, the upward movement of the horizontal part 22a of the pad pressing pieces 22, 22 due to vibrations during running, and the movement of the tongue pieces 24 of the vertical part 22b can be avoided. The movement of the retainer/pad spring 19 in the direction of the hanging portion 24c is restricted by the hanging portion 24c, thereby preventing deformation of the retainer/pad spring 19.

Furthermore, this retainer and padded spring 19
The retainer pieces protect the guide parts 5, 5, and the pad pressing pieces 22, 22 press the friction pads 15, 16 toward the center of the disk, so the number of parts is reduced, manufacturing costs are reduced, and assembly is simplified. It saves you time.

[Effect of idea]

The retainer/pad spring of the present invention includes a pair of retainer pieces connected by a connecting piece, a pair of pad pressing pieces each having a vertical part and a horizontal part continuous thereto, and pressing the friction pads independently. for regulating the movement of the pad pressing piece, which is connected by a loop part, and has a hanging part on the side of the connecting piece that rises from the connecting piece, straddles the vertical part of the pad pressing piece, and extends at a predetermined distance from the horizontal part. Since the tongue piece is provided, it is possible to suppress excessive deformation of the retainer/pad spring, especially the pad pressing piece, and prevent deformation due to vibration or lifting. That is, the hanging part of the tongue piece restricts the upward movement of the horizontal part of the pad pressing piece;
By restricting the lateral movement of the vertical portion in the direction of the hanging portion, excessive deformation of the pad pressing piece can be effectively prevented.

[Brief explanation of drawings]

1 to 3 show one embodiment of the present invention, in which FIG. 1 is a half-sectional rear view of a disc brake device, FIG. 2 is a sectional view taken from FIG. 1, and FIG. It is a perspective view of a pad spring. 1... Disc, 2... Bracket, 5... Guide section, 6... Caliper, 13, 14... Back plate,
15, 16... Friction pad, 19... Retainer/pad spring, 20... Connection piece, 21... Retainer piece, 22... Pad pressing piece, 23... Loop portion, 24... Tongue piece.

Claims (1)

[Scope of utility model registration request] A pair of friction pads are arranged on both sides of a disc that rotates together with the wheel, a bracket that supports the friction pads so as to be slidable in the axial direction of the disc by a guide part, and a bracket that is interposed between the bracket and the friction pads. In a vehicle disc brake device equipped with a retainer/pad spring that presses the friction pads toward the center of the disc, the retainer/pad spring covers a guide portion of the bracket and includes a pair of pad springs connected by a connecting piece. A retainer piece and a pair of pad pressing pieces each having a vertical part and a horizontal part continuous thereto and pressing the friction pads independently are looped at a position offset toward the disk from the center of the pad pressing pieces. movement of a pad pressing piece, which is connected to the connecting piece and has a hanging part on the side of the connecting piece that rises from the connecting piece and extends across the vertical part of the pad pressing piece at a predetermined distance from the horizontal part; A retainer and pad spring for a vehicle disc brake device, which is characterized by having a tongue piece for regulation.