KR20210121689A - Brake device - Google Patents

Abstract

Disclosed is a brake apparatus. The brake apparatus according to an embodiment of the invention comprises: an inner pad assembly for pressing a disc; and a caliper housing having an outer pad assembly and a finger unit moving to be in contact with or spaced apart from the outer pad assembly. The finger unit is provided with a friction member which increases a frictional force with respect to the surface in contact with the finger unit of the outer pad assembly. An object of the present invention is to provide the brake apparatus capable of reducing a noise.

Description

brake device {BRAKE DEVICE}

The present invention relates to a brake device, and more particularly, to a brake device in which frictional force of a caliper housing finger portion in contact with a pad plate is improved.

In general, a caliper brake mounted on a vehicle is a device for decelerating, stopping, or maintaining a stopped state of a vehicle while driving.

This caliper brake can press a pair of pad plates to which friction pads are attached, a carrier and a pair of pad plates coupled to the vehicle body and slidably supporting the pair of pad plates spaced apart from each other with a disk. A caliper housing slidably coupled to the carrier is provided.

A cylinder in which a piston is installed is provided at a rear portion of the caliper housing, and a finger portion bent downwardly is provided at a front portion thereof. In the caliper brake, a piston provided in the cylinder pushes the pad plate on one side, the caliper housing moves by the reaction force, and a finger provided at the front of the caliper housing pushes the pad plate on the other side toward the disc. Accordingly, friction pads respectively provided on the pair of pad plates press the disks from both sides, thereby braking. In order to reduce noise caused by friction during the braking operation, a method of additionally attaching a noise shim or a cover shim to a pad plate, forming a chamfer or slot in the friction pad, or changing a material of the noise shim is being performed. However, only adding parts of the outer pad plate without changing the surface of the finger part of the caliper housing limits the tuning of the friction coefficient, resulting in a reduced noise improvement effect.

Korea Patent Publication No. 2013-0048345 (published on May 10, 2013)

An object of the present embodiments is to provide a brake device capable of reducing noise generated by friction with an outer pad plate by tuning a friction coefficient of a surface of a finger portion of a caliper housing.

According to an aspect of the present invention, an inner pad assembly and an outer pad assembly for pressing the disk; and a caliper housing having a finger portion that moves to contact or separate from the outer pad assembly, wherein the finger portion is provided with a friction member for increasing frictional force with respect to a surface in contact with the outer pad assembly and the finger portion. may be provided.

The finger portion may include a pair disposed in parallel, and the friction member may be provided in each of the pair of finger portions.

The caliper housing includes a body portion having a cylinder in which a piston is accommodated, and a bridge portion extending from the body portion to enclose upper portions of the inner pad assembly and the outer pad assembly at the lower portion and to which the fingers are connected.

The friction member may be formed of a material having high heat resistance.

The friction member may be adhesively fixed to the finger portion.

It further includes a carrier on which the inner pad assembly and the outer pad assembly are installed to move forward and backward.

A receiving portion for accommodating at least a portion of the friction member may be provided on a surface of the finger portion to which the friction member is coupled.

The friction surface of the friction member seated in the receiving part may form the same plane as the surface of the finger part.

The friction member may be provided detachably from the receiving part.

The friction member may be able to slide in and out of the receiving part.

The pair of friction members may have different heights protruding from the surface of the finger part.

At least one friction surface of the pair of friction members includes a flat portion formed of a flat surface, and a protrusion protruding from a lower end of the flat portion toward the outer pad assembly.

The friction member includes at least one elastic protrusion that is deformed when in contact with the outer pad plate and is restored when the contact with the outer pad plate is released.

The outer pad assembly may include an outer pad plate to which a friction pad is coupled, and when the finger part moves, the friction member may contact the outer pad plate.

One side wall of the accommodating part is opened, and the friction member may be slidably introduced into the accommodating part through the open one side wall of the accommodating part.

The friction members respectively disposed on the pair of finger portions may have different widths.

It further includes a cover panel coupled to seal the one open side wall of the accommodating part.

In the present embodiments, as the surface friction coefficient of the finger portion of the caliper housing is tuned, a shim attached to the pad plate may be removed to reduce noise, thereby improving productivity according to material cost reduction.

The present embodiments can induce smooth movement and return of the pad plate by the pad spring during a braking operation, thereby reducing residual drag.

According to the present embodiments, a friction member is provided in the finger portion of the caliper housing, thereby improving the degree of tuning freedom.

1 is an exploded perspective view of a brake device according to the present embodiment.
2 is a cross-sectional view of the brake device of the present embodiment.
3 is a view showing the coupling relationship of the friction member attached to the finger portion of the present embodiment.
4 is a view showing another embodiment of a method of attaching the friction member to the finger portion of the caliper housing according to the present embodiment.
5 is a view showing another embodiment of a method for attaching the friction member to the finger portion of the caliper housing according to the present embodiment.
6 shows a friction member according to the second embodiment.
7 shows a friction member according to the third embodiment.
8 shows a friction member according to the fourth embodiment.
9 shows a friction member according to the fifth embodiment.
10 is an operation state diagram of a friction member according to the fifth embodiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments introduced below are provided as examples so that the spirit of the present invention can be sufficiently conveyed to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments described below and may be embodied in other forms. In order to clearly explain the present invention, parts irrelevant to the description are omitted from the drawings, and in the drawings, the width, length, thickness, etc. of components may be exaggerated for convenience. Like reference numerals refer to like elements throughout.

FIG. 1 is an exploded perspective view of a brake device according to this embodiment, FIG. 2 is a cross-sectional view of the brake device according to this embodiment, and FIG. 3 shows a coupling relationship between a friction member attached to a finger part of this embodiment.

1 to 3 , the brake device 10 of this embodiment includes an inner pad assembly 20 and an outer pad assembly 30 that respectively press both sides of the disk 11 rotating together with the wheel, and the inner pad The carrier 40 on which the assembly 20 and the outer pad assembly 30 are supported so as to move forward and backward, and the carrier 40 so that the inner pad assembly 20 and the outer pad assembly 30 can be pressed with the disk 11 . It includes a caliper housing 50 that is slidably installed on the inner pad assembly 20 and a pair of pad springs 60 that slidably support the inner pad assembly 20 and the outer pad assembly 30 .

The disk 11 rotates together with the wheel, and one outer periphery thereof may enter the inside of the carrier 40 coupled to the vehicle body.

The inner pad assembly 20 includes an inner pad plate 21 that is supported by a pad spring 60 and slides, and an inner friction pad 22 coupled to the inner pad plate 21 and frictionally contacting one surface of the disk 11 . ) is included.

Guide protrusions 23 supported by the pad spring 60 may protrude from both ends of the inner pad plate 21 .

The outer pad assembly 30 includes an outer pad plate 31 slidably supported by a pad spring 60 , and an outer friction pad 32 coupled to the outer pad plate 31 and frictionally contacting the other surface of the disk 11 . ) is included.

Guide protrusions 33 supported by the pad spring 60 may protrude from both ends of the outer pad plate 31 .

The carrier 40 includes a main beam 42 having a knuckle hole 41 coupled to the vehicle body, and a pair of guide beams 43 provided on both sides of the main beam 42 .

The main beam 42 may be fixed to the vehicle body through a mounting bolt fastened to the knuckle hole 41 . The main beam 42 may prevent deformation of the carrier 40 due to braking torque generated during braking.

The guide beam 43 has a sliding groove 44 corresponding to the guide protrusions 23 and 33 of the pad plates 21 and 31 and a guide hole 45 through which the caliper housing 50 is coupled.

The pad spring 60 is installed between the pad assemblies 20 and 30 and the carrier 40 to induce smooth movement and return of the pad plates 21 and 31 during braking.

The caliper housing 50 includes a body part 53 having a cylinder 51 in which a piston 52 is accommodated, a bridge part 54 extending laterally from the body part 53 , and a bridge part 54 . and a finger portion 55 extending downwardly from the end.

The finger part 55 may include a pair extending downward from both sides of the bridge part 54 , respectively.

Ear portions 57 to which the guide rods 56 are coupled are provided on both sides of the main body 53 , and the guide rods 56 are inserted into the guide holes 45 provided at both ends of the carrier 40 as they are inserted into the carrier ( 40) is slidably installed.

A piston 52 is installed in the cylinder 51 so as to move forward and backward. The piston 52 presses the inner pad assembly 20 while moving forward by braking hydraulic pressure or actuator driving, and the caliper housing 50 moves by the reaction force, and the finger portion 55 moves the outer pad assembly 30 to the disk. (11) is pressed to the side.

The finger part 55 is bent downwardly at the end of the bridge part 54 of the caliper housing 50 so as to surround the outer pad assembly 30 , and is parallel to press the left and right parts of the outer pad assembly 30 . A pair to be arranged may be provided.

The finger portion 55 is provided with a friction member 70 for increasing frictional force on the surface of the finger portion 55 in contact with the outer pad assembly 30 .

The friction member 70 may be made of a material having excellent heat resistance and abrasion resistance, and the finger portion 55 may be adhesively fixed to the surface 55a of the finger portion 55 in contact with the outer pad assembly 30 .

In this embodiment, although it is shown that the friction member 70 has a rectangular pad shape, the friction member 70 corresponds to the contact area between the finger part 55 and the outer pad assembly 30 or the shape of the finger part 55 . It may have various shapes.

When the friction member 70 is provided on the finger part 55 , a separate noise seam for reducing noise is not required in the outer pad assembly 30 . That is, the configuration of the noise shim and the cover shim mounted on the existing outer pad plate 31 for noise reduction can be removed, and the friction member 70 of this embodiment is installed to cover the entire area of the outer pad plate 31 . Unlike the conventional noise seam, the finger portion 55 can be implemented only in a shape corresponding to the area in contact with the outer pad plate 31 , thereby reducing manufacturing cost.

In addition, in the present embodiment, as the friction member 70 for reducing braking noise is attached to the finger part 55, the total weight of the outer pad assembly 30 moving toward the disk 11 is reduced, so that the pad spring ( 60), it is possible to induce smooth movement and return of the outer pad plate 31, thereby improving the residual drag.

4 and 5 show an embodiment of a method for attaching the friction member to the finger portion of the caliper housing according to the present embodiment. Hereinafter, the same reference numerals are assigned to the same components, and detailed descriptions thereof are omitted.

4, the finger portion 55 of the caliper housing 50 is provided with a groove-shaped receiving portion 80 recessed inward from the surface 55a, and the friction member 70 is provided with the receiving portion 80. At least part of it can be accommodated.

The accommodating part 80 is formed in a shape corresponding to the friction member 70 , and the friction member 70 may be adhered to the bottom of the accommodating part 80 .

The thickness t of the friction member 70 may be provided equal to the depth d of the accommodating part 80 , and in a state in which the friction member 70 is accommodated in the accommodating part 80 , the friction member 70 is The friction surface 71 and the surface 55a of the finger portion 55 may form the same plane. This may provide uniform surface pressure when the finger portion 55 presses the outer pad plate 31 .

When the friction member 70 is seated on the receiving part 80 , the edge 72 of the friction member 70 may be in close contact with the side wall 81 of the receiving part 80 . Accordingly, the friction member attached to the finger part 55 under the influence of a moment applied to the friction member 70 by the rotation of the disk 11 while the friction member 70 is in contact with the outer pad plate 31 ( 70) can be prevented from falling.

Referring to FIG. 5 , the finger portion 55 of the caliper housing 50 is provided with a receiving portion 80 recessed inward from the surface 55a, and the friction member 70 is detachable from the receiving portion 80 . can be installed properly.

To this end, one side wall 81a of the receiving part 80 may be formed in an open shape, and the friction member 70 is connected to the receiving part 80 inside the receiving part 80 through the open part 81a of the receiving part 80 . It can be brought in by sliding.

A guide rib 73 may protrude from one side of the friction member 70 , and a guide groove 82 engaged with the guide rib 73 of the friction member 70 may be formed on one side of the receiving part 80 . have.

When a pair of guide ribs 73 are provided at both upper and lower ends of the friction member 70 , guide grooves 82 corresponding to the pair of guide ribs 73 are also formed at both upper and lower ends of the receiving part 80 . can

In a state in which the friction member 70 is coupled to the receiving part 80 , the friction member 70 is not separated from the receiving part 80 by the shape restraints of the guide rib 73 and the guide groove 82 .

When the friction member 70 enters through the open portion of the receiving portion 80 and the friction member 70 is seated in the receiving portion 80 , the open portion of the receiving portion 80 is attached to the cover panel 90 . can be closed by The cover panel 90 may be coupled to the finger portion 55 by a fastening member 91 such as a bolt.

Through this, when the friction member 70 is installed on the finger portion 55 of the caliper housing 50 or when the friction member 70 is replaced due to wear or damage, workability can be significantly improved.

6 to 8 are exemplary views showing various shapes of the friction member according to the present exemplary embodiment.

Referring to FIG. 6 , the friction members 70 respectively attached to the pair of finger portions 55 of the caliper housing 50 may be formed to have different widths w1 and w2 .

This is the friction member 70 attached to the finger portion 55 to which a relatively large force is applied as the force applied to the pair of finger portions 55 is different depending on the rotational direction of the disk 11 during braking. By increasing the width, it is possible to increase the frictional force due to an increase in the contact area.

Referring to FIG. 7 , the friction members 70 respectively attached to the pair of finger portions 55 of the caliper housing 50 are formed to have different thicknesses and protrude from the surface 55a of the finger portions 55 . The heights h1 and h2 may be formed to be different from each other.

This is the outer friction pad ( 32) can be compensated for.

Referring to FIG. 8 , at least one friction surface 75 of the friction member 70 attached to the pair of finger portions 55 of the caliper housing 50 includes a flat portion 75a made of a flat surface, and a flat surface portion 75a. It includes a protrusion 75b protruding toward the outer pad assembly 30 from the lower end of the portion 75a.

The flat portion 75a may be located in an upper region of the friction member 70 , and the protrusion 75b may be located in a lower region of the friction member 70 . The protrusion 75b may be formed as an inclined surface in which the thickness of the friction member 70 gradually increases toward the lower end of the friction member 70 .

This is because the thickness of the lower side of the friction member 70 is equal to the thickness of the upper side of the friction member 70 in consideration of the effect of the moment generated at the connection part between the finger part 55 and the bridge part 54 of the caliper housing 50 during braking. As the thickness is greater than the thickness, uneven wear of the outer pad assembly 30 may be prevented.

9 is another embodiment of the friction member according to the present embodiment, and FIG. 10 is an operation state diagram of the friction member of FIG. 9 .

9 and 10 , the friction surface 71 of the friction member 70 attached to the finger part 55 of the caliper housing 50 is deformed when in contact with the outer pad plate 31, and the outer pad plate At least one elastic protrusion 77 that is restored to its original state when the contact with the 31 is released may protrude.

The elastic protrusion 77 can prevent noise generation as the friction member 70 comes into contact with the outer pad plate 31 before the friction surface 71 during braking, and returns to the original position when braking is released. As the outer pad plate 31 is pushed from the friction surface 71, the residual drag can be reduced.

The elastic protrusion 77 may include a rubber material, and may include a spherical shape, a hemispherical shape, an embossing shape, etc. that can be deformed into a flat shape after point contact.

In the above, specific embodiments have been shown and described. However, it is not limited to the above-described embodiment, and those of ordinary skill in the art to which the invention pertains will be able to make various changes without departing from the spirit of the invention described in the claims below.

10: brake device, 11: disc,
20: inner pad assembly, 30: outer pad assembly,
31: outer pad plate, 32: outer friction pad,
40: carrier, 50: caliper housing,
53: body portion, 54: bridge portion,
55: finger portion, 55a: surface;
60: pad spring, 70: friction member,
71: friction surface, 73: guide rib,
75a: flat part, 75b: protrusion;
77: elastic protrusion, 80: receiving part,
82: guide groove, 90: cover panel.

Claims (17)

an inner pad assembly and an outer pad assembly for pressing the disc; and
and a caliper housing having a finger portion that moves to be in contact with or spaced apart from the outer pad assembly;
The finger portion is provided with a friction member for increasing frictional force with respect to a surface in contact with the outer pad assembly of the finger portion. According to claim 1,
The brake device includes a pair of the finger portions disposed in parallel, and the friction member is provided in each of the pair of finger portions. According to claim 1,
The caliper housing includes a body part having a cylinder in which a piston is accommodated, and a bridge part extending from the body part to surround the upper parts of the inner pad assembly and the outer pad assembly at the lower part and connecting the fingers. According to claim 1,
The friction member is a brake device formed of a heat-resistant material. According to claim 1,
The friction member is adhesively fixed to the finger portion. According to claim 1,
The brake device further comprising a carrier on which the inner pad assembly and the outer pad assembly are installed to move forward and backward. According to claim 1,
A brake device having a receiving portion accommodating at least a portion of the friction member on a surface of the finger portion to which the friction member is coupled. 8. The method of claim 7,
The friction surface of the friction member seated in the receiving portion forms the same plane as the surface of the finger portion. 8. The method of claim 7,
The friction member is a brake device that is detachably provided in the receiving portion. 8. The method of claim 7,
The friction member is a brake device capable of sliding in and out of the receiving portion. 3. The method of claim 2,
The pair of friction members have different heights protruding from the surface of the finger part. 3. The method of claim 2,
At least one friction surface of the pair of friction members includes a flat portion formed of a flat surface, and a protrusion protruding from a lower end of the flat portion toward the outer pad assembly. According to claim 1,
The friction member includes at least one elastic protrusion that is deformed when in contact with the outer pad plate and is restored when the contact with the outer pad plate is released. According to claim 1,
The outer pad assembly includes an outer pad plate to which a friction pad is coupled, and the friction member is in contact with the outer pad plate when the finger part moves. 10. The method of claim 9,
One side wall of the accommodating part is opened, and the friction member slides into the accommodating part through the open one side wall of the accommodating part. 3. The method of claim 2,
The friction members respectively disposed on the pair of finger portions have different widths. 16. The method of claim 15,
The brake device further comprising a cover panel coupled to seal the one open sidewall of the receiving portion.

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