JPH0315868Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a type of disc brake that includes a caliper body. The caliper body has pads that straddle the disc and are on either side of the disc.

In disc brakes of this type, it is known that the pads are accommodated between the jaws of the caliper body and are held within said caliper body tangentially to the circumference of the disc during each braking operation.

(Prior Art and Problems) The pads of conventionally used disc brakes are attached to a seat formed on the caliper body and are radial with respect to the disc. During braking, the pads will move depending on the direction of braking.
It is pressed against one end wall or the other end wall of the seat.

Such disc brakes often generate vibration and noise during braking operation. Furthermore, if sudden braking is repeated, the pad may knock against the end wall of the seat to which the pad is attached, causing rapid deterioration and damage to the contact surface.

(Objective of the invention) An object of the invention is to provide a disc brake that is structurally and functionally distinctive. This feature satisfies the requirements of retaining the pad within the caliper body in the tangential direction of the disk and overcoming the disadvantages associated with the prior art as described above.

(Structure of the invention) The object is to provide a disc brake of the above type in which a pad extends tangentially to the disc, both ends of the pad are hook-shaped, each of the hook-shaped ends engages with a pin, and the pad extends tangentially to the disc. The pins are realized by such disc brakes being arranged spaced apart and parallel within the caliper body.

Preferably, each of the pins is a shaft portion of a bolt, and the bolt is tightened with a predetermined force across the caliper body.

Further features and advantages of the disc brake according to the invention will be explained on the basis of preferred embodiments and with reference to the accompanying drawings. The preferred embodiment is not intended to limit the invention.

Embodiments of the invention In the accompanying drawings, a disc brake according to the invention is generally designated 1. FIG. The disc brake is particularly intended for use in braking wheels of automobiles, etc., but is not limited thereto.

The disc brake 1 includes a brake support 2. The brake support 2 is preferably cast from a light alloy integrally with a part (not shown) of an automobile or the like.

The disc brake 1 also includes a caliper body.
The caliper body is preferably cast from a light alloy and is positioned across the peripheral portion 4 of the brake disc 5 having the XX axis.

The peripheral part 4 constitutes an annular braking band of the disc 5. As in the prior art, the disk 5 is firmly fixed to a wheel of an automobile or the like by means of parts not shown.

Guide means, generally designated 6, extend parallel to the X-X axis between the brake support 2 and the caliper body 3, such that the caliper body 3
to be able to slide in any direction.

The caliper body 3 extends tangentially t-t to the disc over a predetermined distance and has two jaws 7 and 8. Grip parts 7 and 8
are located on both sides of the peripheral part 4 of the brake disc 5. The caliper body 3 is provided with brake pads 9 and 10 corresponding to the gripping portions in a manner that will be explained below. brake pad 9
and 10 face both surfaces of the peripheral part 4, and t-
It extends over a predetermined distance in the t direction.

In the caliper body 3, corresponding to the gripping part 7,
A hydraulic cylinder is provided in a conventional manner. The hydraulic cylinder, indicated generally at 11, presses the pad 9 against one side of the periphery 4 of the disk 5 and by its reaction presses the pad 10 against the opposite side of the periphery 4.

Specifically, each pad 9, 10 is attached to plate 1.
2, 13, preferably stamped from sheet steel, to which pads 14, 15 of friction material are adhered.

The brake band 4 and the pads 9 and 10, i.e. the jaws 7 and 8 of the caliper body, move in the direction r- which is radial to the disc 5 and perpendicular to X-X and t-t. r over a predetermined distance. Preferably, the predetermined distance is a fraction, such as 1/3, of the length of the pad in the t-t direction.

In the disc brake 1, the caliper body 3
The guide means 6 between the brake support 2 and the
It includes two cylindrical pins 16a and 16b. The pins 16a and 16b have respective axes a-a and bb, extend parallel to the X-X axis and are fixed to the support 2 at a distance from each other.

On the other hand, the caliper main body 3 has two appendages 1a and 17 spaced apart from each other and having openings.
It has b. Appendages 17a and 17b have cylindrical seats 18a and 18b, respectively, in which pins 16a and 16 can be mounted with limited play.
b are connected to each other.

In the disc brake 1 based on the present invention,
Pads 9 and 10 that extend in the t-t direction
is supported within the caliper body 3 by a pin (holding pin) 19. The pin 19 is loosely mounted on the caliper body 3. The axis of pin 19 is
It is parallel to X-X. Pads 9 and 10 are connected to pin 1 by eyelets 20 and 21, respectively.
It is loosely combined with 9.

Stopping means, generally indicated at 22, are provided to prevent movement of pads 9 and 10 about pin 19. The stopping means 22 includes axes Xa-Xa and Xb-Xb.
It consists of two cylindrical (engaging pin) pins 23a and 23b. Pins 23a and 23b
extend parallel to the axis X-X and spaced apart from each other, the ends of the pins being accommodated in the jaws 7 and 8 of the caliper body 3 at a position immediately outside the outer peripheral edge of the brake band 4. be done. The ends of pads 9 and 10 engage pins 23a and 23b. For this purpose, both ends of each pad 9, 10 are formed into hook-shaped portions 9a and 9b, 10a and 10b, respectively, and are arranged symmetrically with respect to the eyelets 20, 21. Hook-shaped portions 9a, 10
a is two bearing surfaces 24a and 25a, 26a
and 27a to wrap the pin 23a. Surface 24
a, 26a extend in the t-t direction, and surfaces 25a, 27
a is perpendicular to the t-t direction. Surfaces 24a, 25
a, 26a, 27a all face pin 19. Similarly, the hook-like portions 9b, 10b have two bearing surfaces 24b and 25b, 26b and 27
Wrap pin 23b in b. Surfaces 24b and 26b extend in the t-t direction, and surfaces 25b and 27b are perpendicular to the t-t direction. Surfaces 24b, 25b, 26b, 2
7b all face pins 19.

Each pin 23a, 23b is a steel bolt 2.
It is preferable to consist of shaft portions 8a and 8b. The bolts 28a, 28b are tightened with a predetermined force across the caliper body 3 between the gripping portions 7 and 8. In particular, the head of each bolt 28a, 28b is pressed against the jaw 7, and the threaded end of the bolt is connected to the jaw 8. The bolts 28a and 28b, when tightened with a predetermined force, stiffen the caliper body 3 and preload it to resist the action of the cylinder 11.

The small spring 29 is pressed against the caliper body 3 and constantly presses the caliper body 3 against the pins 23a and 23b through the pin 19 and the pads 9 and 10, so that rattling and vibration of the caliper body 3 is prevented when the brake is not activated. prevent.

During brake operation, the caliper body 3 is on the disc 5
located above and slides freely along pins 6a and 16b. At the same time, the hook-like ends 9a and 10a of pads 9 and 10, or 9b and 1
0b comes into pressure contact with pin 23a or 23b depending on the braking of the vehicle in one direction or the other.

Once this condition is reached, brake application can be sustained for as long as necessary.

Pads 9 and 10 are thus held firmly within the caliper body by the hook-like portions. When the brakes are applied, due to the counteraction between the tangential braking force and the reaction force of the hook-shaped part,
Pads 9 and 10 are constantly exposed to traction forces in the t-t direction. Furthermore, said pad releases a tangential braking force onto the caliper body 3 through the hook-like portions 9a and 10a or 9b and 10b. The hook-shaped portion is attached to the bolt 28a.
or react against 28b. This reaction occurs through contact between high resistivity materials (steel-to-steel contact) and occurs without local collapse.

(Effects of the invention) Due to the tangential traction force applied to the pads during brake operation, the disc brake based on the invention is completely free of vibration and noise.

Furthermore, since the contact between the pads and the caliper body is through a high resistivity surface, disc brakes based on the invention can be expected to have a long working life without damage.

A further advantage of the disc brake according to the invention is that the preloading effect exerted by the bolts 28a and 28b allows a reduction in the weight of the caliper body.

It will be apparent to those skilled in the art that many changes and modifications can be made to the disc brake to meet the particular needs involved. However, all of these are included in the scope of utility model registration claims.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway elevational view showing a disc brake based on the present invention, FIG. 2 is a partially cutaway plan view of the disc brake shown in FIG. 1, and FIG.
1 is a side view of the disc brake shown in FIG. 1. FIG.

Claims (1)

[Claims for Utility Model Registration] (1) In a disc brake that includes a caliper body located across the disc, the caliper body has pads on both sides of the disc,
The pad extends tangentially to the disk and is held to the caliper body via a retaining pin that loosely fits into a small hole drilled in the center of the pad, and hook-shaped portions are provided at both ends of the pad in the tangential direction. each hook-shaped portion has a bearing surface parallel to the tangential direction and a bearing surface perpendicular to the tangential direction, these bearing surfaces facing the holding pin side, and each hook-shaped portion The said disc brake is characterized in that the engaging pins are respectively engaged with engaging pins, and the engaging pins extend parallel to each other at intervals within the caliper main body. (2) In the disc brake according to claim (1) of the utility model registration, each of the engagement pins is a shaft portion of a bolt tightened across the caliper body with a predetermined force. The disc brake.