KR20210085313A - Pad spring and Caliper brake having the same - Google Patents

Abstract

Disclosed are a pad spring, and a caliper brake having the same. According to one aspect of the present invention, the pad spring, which is installed in each of coupling protrusions protruding from a carrier to slidably support a pair of pad plates facing each other toward a disk, comprises a return unit extended from an edge of the pad spring to elastically support each pad plate to be returned to an original position, wherein the return unit is elastically deformed during operation of the pad plate, and is in contact with the disk when a predetermined amount of a friction pad attached to the pad plate is worn out.

Description

Pad spring and Caliper brake having the same

The present invention relates to a pad spring and a caliper brake having the same, and more particularly, to a pad spring capable of preventing a drag phenomenon by returning a pad plate to its original position using elastic force when braking is released, and a caliper brake having the same is about

BACKGROUND ART In general, a disc brake mounted on a vehicle is a device for decelerating, stopping, or maintaining a stopped state of a vehicle while driving, and is a device for obtaining braking force by strongly pressing a disk-shaped disk rotating together with a wheel with pads from both sides.

Such a disc brake (hereinafter, referred to as a caliper brake) is disclosed in Korean Patent Publication No. 2014-0067202. According to the disclosed document, a caliper brake includes a pair of pad plates to which friction pads are attached, a carrier coupled to a vehicle body and slidably supporting the pair of pad plates spaced apart from each other by a predetermined distance, and a pair of pad plates to a disk. and a caliper housing slidably coupled to the carrier so as to press the pad with a pad and a pad spring interposed between the carrier and a pair of pad plates to slidably support the pair of pad plates.

Here, the pad springs are respectively installed at both inner ends of the carrier to support a pair of pad plates. Accordingly, the pad spring is provided such that a pair of support parts for supporting a pair of pad plates and a connection part for connecting the pair of support parts to each other are integrally formed.

In addition, in order to return the pair of pad plates to their original positions after the braking operation, a retraction spring is installed on the pair of pad plates and used in the caliper brake. The retraction spring forms a coupling jaw at the upper end of the pair of pad plates, and is installed on the coupling jaw to provide an elastic force to the pad plate. This retraction spring is disposed between the pad plate and the top and the caliper housing.

On the other hand, although not shown in the disclosed literature, a wear sensor is separately installed and used in the caliper brake to transmit a certain amount of friction pad attached to the pad plate to the user when a certain amount is worn.

However, as the retraction spring is installed on the upper portion of the pad plate, there is a problem in that the manufacturing cost increases due to the processing of the coupling jaw for installing the retraction spring, as well as the installation is difficult.

In addition, as the braking action is repeated, the retraction spring is plastically deformed as the friction pad attached to the pad plate is consumed by friction with the disk, and thus a uniform return load cannot be provided to the pad plate. , there is a problem that a drag phenomenon occurs.

In addition, the pad spring according to the prior art is configured to integrally form a pair of support parts and a connection part connecting them and install them on a carrier, so that precise processing is required for a firm installation, thereby reducing productivity and increasing manufacturing costs.

On the other hand, in the prior art, when a certain amount of friction pad is worn, a separate wear sensor needs to be installed on the pad plate to notify the user, so productivity is lowered and manufacturing cost is increased.

Laid-Open Patent Publication No. 10-2014-0067202 (Mando Co., Ltd.) 2014. 06. 05.

A pad spring and a caliper brake having the same according to an embodiment of the present invention are manufactured and installed by forming a return part providing an elastic force in the pad spring, as well as allowing a pair of pad plates to quickly return to their initial positions after a braking operation. make it easy

In addition, the pad spring and the caliper brake having the same according to an embodiment of the present invention maintain a stable coupling state even when the pad spring is used for a long time and is subjected to a load generated during braking operation because the pad spring is independently mounted in each region supporting the pad plate. It is possible to reduce the manufacturing cost by allowing the return part to act as a wear sensor.

According to an aspect of the present invention, a pad spring is provided on a coupling jaw protruding from a carrier to support a pair of pad plates facing each other to be slidably movable toward the disk, and is formed extending from the edge of the pad spring to each a pad spring provided to elastically support the pad plate and return to its original position, wherein the return part is elastically deformed when the pad plate is operated, and the friction pad attached to the pad plate is in contact with the disk when a certain amount is worn. may be provided.

According to another aspect of the present invention, a pair of pad plates to which friction pads are attached so as to compress both sides of the disk rotating together with the wheel; a carrier having a slide groove into which the protrusions formed on both sides of each pad plate are fitted so that the pair of pad plates are installed to move forward and backward toward the disk, and a coupling protrusion formed on an upper side of the slide groove; a caliper housing that is slidably mounted on the carrier and operates the pair of pad plates; and a pad spring interposed between the carrier and a pair of pad plates, each coupled to the coupling jaws, and slidably supporting the pair of pad plates, wherein the pad is formed extending from an edge of the pad spring. A caliper brake may be provided, comprising a return portion for resiliently supporting the protrusion of the plate and returning it to its original position, wherein the return portion is elastically deformed when the pad plate is operated, and the friction pad is provided to come into contact with the disk when a certain amount of wear occurs. .

The return unit may include: a first extension extending toward the disk; and a second extension part having an end bent in a direction toward the pad plate and extending from the first extension part in a direction away from the disk.

In addition, the second extension portion may include a bent portion formed by bending to provide a contact surface at an end thereof, and the end of the bent portion may be provided to contact the disk when the return portion is elastically deformed by a predetermined amount or more.

In addition, the pad spring may include a guide part inserted into the slide groove to support the protrusion to be slidably moved; a support portion extending bent from the lower end of the guide portion to elastically support the lower end of the protrusion; and a coupling part extending bent from an upper part of the guide part and coupled to surround the coupling jaw.

In addition, the coupling part is coupled to a first clip part in close contact with one surface of the coupling jaw facing the disk, a second clip part in close contact with the other surface of the coupling jaw, and an upper surface of the coupling jaw to control the movement of the pad spring. It may be provided with a third clip portion limiting.

In addition, a restraining groove is formed on the upper surface of the coupling jaw in the movement direction of the pad plate, and the third clip part includes a restraining piece protruding toward the restraining groove, and the restraining piece has an end of the restraining groove. It may be formed to be inclined downward so as to be caught on one end surface of the.

In addition, the return part may be formed in the guide part.

In addition, in order to facilitate the elastic deformation of the return portion, the guide portion may be provided with cutouts formed by cutting the upper and lower sides of the return portion.

In the pad spring and the caliper brake having the same according to an embodiment of the present invention, deformation and damage are prevented even by the load generated during long-time use and braking operation because the pad spring is independently mounted in each region supporting the pad plate. It has the effect of maintaining a stable bonding state.

In addition, manufacturing and installation are easy as the return part that provides elastic force to the pad plate is integrally formed with the pad spring, and uniform return load is provided to a pair of pad plates to prevent uneven wear of the friction pad and to restore the pad plate to the initial stage. There is an effect of not only returning to the position quickly, but also preventing the drag phenomenon.

In addition, it is possible to reduce the manufacturing cost by allowing the return part to serve as a wear sensor.

The present invention will be described in detail with reference to the drawings below, but these drawings show preferred embodiments of the present invention, and therefore the technical spirit of the present invention should not be construed as being limited only to the drawings.
1 is an exploded perspective view illustrating a caliper brake according to an embodiment of the present invention.
2 is a perspective view illustrating a pad spring according to an embodiment of the present invention.
FIG. 3 is a rear perspective view of the pad spring shown in FIG. 2 .
4 is an exploded perspective view illustrating a state in which a pad spring is assembled to a carrier according to an embodiment of the present invention.
5 is a perspective view illustrating a state in which a pad spring is assembled to a carrier according to an embodiment of the present invention.
6 is a plan view illustrating a state in which a pad spring is assembled to a carrier according to an embodiment of the present invention.
7 is a side view illustrating a state in which a pad spring is assembled to a carrier according to an embodiment of the present invention.
8 is a partial perspective view illustrating a state in which a pad plate is installed on a pad spring according to an embodiment of the present invention.
9 is a partial perspective view illustrating an operating state of a caliper brake according to an embodiment of the present invention.
10 is a view showing a state in which a return unit provided in a pad spring according to an embodiment of the present invention functions as a wear sensor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the spirit of the present invention to those of ordinary skill in the art to which the present invention pertains. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. The drawings may omit the illustration of parts irrelevant to the description in order to clarify the present invention, and may slightly exaggerate the size of the components to help understanding.

1 is an exploded perspective view illustrating a caliper brake according to an embodiment of the present invention.

Referring to FIG. 1 , a caliper brake 100 according to an embodiment of the present invention includes a pair of pad plates 110 that respectively compress both sides of a disk D rotating together with a wheel (not shown), and a pair A carrier 120 in which the pad plates 110 of the pad plate 110 are spaced apart from each other by a predetermined distance and are installed to move forward and backward toward the disk D, and the carrier 120 to press the pair of pad plates 110 with the disk D. ) is interposed between the caliper housing 130 and the carrier 120 and the pair of pad plates 110 slidably installed on the pad spring 200 to slidably support the pair of pad plates 110 . includes

A friction pad 111 that rubs against the disk D is attached to the inner surface of the pair of pad plates 110 , and protrusions 112 are formed at both ends of each pad plate 110 . At this time, the pair of pad plates 110 are divided into an inner pad plate 110 disposed to be in contact with a piston 131 to be described later and an outer pad plate 110 disposed to be in contact with a finger part 132 to be described later. .

The carrier 120 is coupled to and fixed to a knuckle (not shown) of the vehicle body so as to be positioned on one side of the outer periphery of the disk D. A slide groove 122 is formed on both sides of the inner side of the carrier 120 at a position corresponding to the protrusion 112 formed on both sides of the pair of pad plates 110, and a coupling jaw ( 123) is formed. The coupling protrusion 123 is made of a pair on both inner sides of the carrier 120 , so that there are four in total. Restriction grooves 124 are formed at the upper ends of the coupling protrusions 123 in the movement direction of the pad plate 110, respectively. The restraining groove 124 is for fixing the pad spring 200, which will be described later, and will be described again below.

In addition, guide holes 125 are provided on both upper sides of the carrier 120 in parallel to the slide grooves 122 . At this time, each slide groove 122 is formed in the front and rear of the carrier 120 so that a pair of pad plates 110 are installed, respectively. That is, as shown, the slide grooves 122 formed on both sides of the carrier 120 are formed to be spaced apart from each other by a predetermined interval, and the disk D is smoothly inserted and positioned in the center thereof. In addition, the outer beam 127 and the main beam 128 are formed in the front and rear of the carrier 120 to withstand the torque generated during the braking operation on the lower side of the slide groove (122).

The protrusion 112 is fitted and coupled to the slide groove 122 so that the pair of pad plates 110 slide along the slide groove 122 of the carrier 120 . That is, when each pad plate 110 advances and retreats along the slide groove 122 , each friction pad 111 is in close contact with both sides of the disk D to generate braking force.

The caliper housing 130 is slidably installed in the carrier 120 as the guide rods 135 installed at both ends are inserted into the guide holes 125 provided at both ends of the carrier 120 . The caliper housing 130 includes a cylinder 133 in which a piston 131 for pressing the inner pad plate 110 is installed so as to move forward and backward, and a finger part 132 for pressing the outer pad plate 110 . do.

A piston 131 is installed in the cylinder 133 to move forward and backward. The piston 131 presses the inner pad plate 110 while moving forward when braking hydraulic pressure is applied to the cylinder 133 , the caliper housing 130 moves by the reaction force, and the finger 132 moves the outer pad plate 110 . ) is pressed toward the disk (D). Accordingly, as the pair of pad plates 110 compress the disk D, a braking force is generated.

Each pad spring 200 is installed on the carrier 120 to support the pair of pad plates 110 to slide. According to one aspect of the present invention, the pad springs 200 are provided to be respectively coupled to the coupling jaws 123 . That is, the four pad springs 200 are coupled to the four coupling jaws 123 to slidably support the pad plate 110 . The pad spring 200 will be described with reference to FIGS. 2 to 9 .

Figure 2 is a perspective view showing a pad spring according to an embodiment of the present invention, Figure 3 is a rear perspective view of the pad spring shown in Figure 2, Figure 4 is a pad spring according to an embodiment of the present invention is assembled to the carrier 5 is an exploded perspective view showing a state in which the pad spring is assembled to a carrier according to an embodiment of the present invention, and FIG. 6 is a perspective view showing a state in which the pad spring is assembled to the carrier according to an embodiment of the present invention. It is a plan view showing a state, FIG. 7 is a side view showing a state in which a pad spring is assembled to a carrier according to an embodiment of the present invention, and FIG. 8 is a state in which a pad plate is installed on a pad spring according to an embodiment of the present invention. It is a partial perspective view showing, and FIG. 9 is a partial perspective view showing an operating state of the caliper brake according to an embodiment of the present invention.

2 to 9 , the pad spring 200 includes a guide part 210 , a support part 220 connected to the lower end of the guide part 210 , and a coupling part connected to the upper part of the guide part 210 ( 230 ) and a return part 240 formed in the guide part 210 . In this case, the guide part 210 , the support part 220 , the coupling part 230 , and the return part 240 constituting the pad spring 200 are integrally formed and may be bent multiple times.

The guide 210 is provided between the slide groove 122 and the protrusion 112 and is coupled to the slide groove 122 . Accordingly, the guide portion 210 has a shape corresponding to the slide groove 122 . The protrusion 112 of the pad plate 110 is inserted into the guide 210 , and the protrusion 112 advances and retreats toward the disk D.

In addition, a return unit 240 is formed on one side of the guide unit 210 to return the pad plate 110 to its original position when the pad plate 110 moves forward or backward. The return unit 240 will be described again below.

The support part 220 is bent and extended from the lower end of the guide part 210 to elastically support the lower end of the protrusion part 112 . The support part 220 is formed by being bent in a direction perpendicular to the inner surface of the guide part 210 , and functions as a bottom surface of the guide part 210 to support the load of the pad plate 110 . Meanwhile, the support part 220 is elastically deformed when the protrusion 112 is coupled to the guide 210 to elastically support the protrusion 112 . Accordingly, the support part 220 absorbs the vibration caused by the vibration, and presses the protrusion 112 to the lower portion of the coupling jaw 123 to maintain a stable coupling state between the pad plate 110 and the pad spring 200 .

The coupling part 230 is formed to extend bent from the upper part of the guide part 210 and is coupled to surround the coupling jaw 123 . The coupling part 230 includes a first clip part 231 that is in close contact with one surface of the coupling jaw 123 facing the disk D, and a second clip part 231 that is in close contact with the other surface opposite to the one surface of the coupling jaw 123 . A third clip part 233 coupled to the upper surface of the clip part 232 and the coupling protrusion 123 to limit the movement of the pad spring 200 may be provided. Each of these clip parts 231 , 232 , 233 serves to stably fix the pad spring 200 to the carrier 120 .

Here, the third clip part 233 is provided with a restraining piece 234 protruding toward the aforementioned restraint groove 124 . The constraint piece 234 may be formed to be inclined downward so that the end is caught on one end surface of the constraint groove 124 . The constraint piece 234 may be formed by bending the so-called 'C'-shaped cut-out portion to protrude. Accordingly, when the coupling part 230 is coupled to the coupling jaw 123 , the constraining piece 234 is elastically deformed and the third clip part 233 is closely coupled to the upper surface of the coupling jaw 123 . At this time, the end of the constraint piece 234 is supported by being caught in close contact with the inner end surface of the constraint groove 124 .

That is, as the first and second clip portions 231 and 232 are in close contact with both sides of the coupling jaw 123 , the movement of the pad spring 200 in the movement direction of the pad plate 110 is restricted. In addition, the third clip part 233 restricts the movement in the tangent direction through the restraining groove 124 formed on the upper surface of the coupling jaw 123 , so that the pad spring 200 is removed from the coupling jaw 123 . is prevented from escaping.

The return unit 240 elastically supports the pad plate 110 in the moving direction and serves to return the pad plate 110 to its original position. The return part 240 is elastically deformed when the pad plate 110 is operated, and the friction pad 111 attached to the pad plate 110 may be provided to contact the disk D when a certain amount is worn. In addition, the return part 240 may be formed to extend from one side end of the guide part 210 . More specifically, the return part 240 includes a first extension 241 extending toward the disk D and a second extension extending from the first extension 241 in a direction away from the disk D. A portion 242 may be provided.

The end of the first extension 241 is bent in a direction toward the pad plate 110 . In addition, in order to facilitate elastic deformation of the return part 240 , the guide part 210 may be provided with a cutout 214 formed by cutting the upper and lower sides of the return part 240 . That is, the cutouts 214 are provided at upper and lower sides of the first extension 241 .

The second extension 242 is formed to extend from an end of the first extension 241 . The second extension 242 includes a bent portion 244 formed by being bent so that a contact surface is provided at an end thereof. The bent portion 244 is provided in contact with the protrusion 112 of the pad plate. Accordingly, as shown in FIG. 9 , as the pad plate 110 moves during braking, it is elastically deformed, and when braking is released, the pad plate 110 returns to its original position by the elastic restoring force. In this case, the end of the bent portion 244 may be provided to contact the disk D when the return portion 240 is elastically deformed by a predetermined amount or more.

10 is a view illustrating a state in which a return unit provided in a pad spring according to an embodiment of the present invention functions as a wear sensor.

Referring to FIG. 10 , the end of the bent portion 244 is provided so that the friction pad (refer to '111' in FIG. 1 ) attached to the pad plate 110 comes into contact with the disk D when a certain amount is worn. More specifically, the end of the bent portion 244 is provided to face the disk D when the second extension portion 242 is elastically deformed. In addition, the bent portion 244 is provided to have a length that can be in contact with the disk D when a predetermined amount of the friction pad 111 is worn. Accordingly, as the friction pad 111 is gradually worn, the amount of elastic deformation of the second extension part 242 increases, and when the friction pad 111 wears over a certain amount (the point of notifying the user of the replacement of the friction pad) The end of the second extension 242 comes into contact with the disk D to transmit information to the user through a fricative sound. By adjusting the length of the bent portion 244 , information on the replacement time of the friction pad 111 can be adjusted.

The pad springs 200 as described above are each independently provided to elastically support the pad plate 110 in a state fixed to the coupling jaw 123 , so that a uniform return load can be applied to the pad plate 110 . As the elastic retraction force of the sliding part and the return part 240 matches, the efficiency can be increased. In addition, uneven wear of the friction member 111 can be prevented by providing a uniform return load while supporting and guiding the pad plate 110 in a state in which the pad spring 200 is stably coupled to the carrier 120 .

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following by those of ordinary skill in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.

100: caliper brake 110: pad plate
112: protrusion 120: carrier
122: slide groove 123: coupling jaw
124: constraint groove 130: caliper housing
200: pad spring 210: guide
220: support 230: coupling part
231: first clip part 232: second clip part
233: third clip part 234: restraint piece
240: return unit 241: first extension
242: second extension 244: bent part

Claims (16)

A pad spring that is respectively installed on the coupling jaws protruding from the carrier and supports a pair of pad plates facing each other to be slidably movable toward the disk,
and a return portion extending from the edge of the pad spring to elastically support each pad plate and return to the original position,
The return part is elastically deformed when the pad plate is operated, and the pad spring is provided to contact the disk when a friction pad attached to the pad plate wears a predetermined amount. According to claim 1,
The return unit,
a first extension portion extending toward the disk; and
and a second extension part having an end of the first extension bent in a direction toward the pad plate and extending from the first extension part in a direction away from the disk. 3. The method of claim 2,
The second extension portion has a bent portion formed by bending to provide a contact surface at the end,
The end of the bent portion is a pad spring provided to contact the disk when the return portion is elastically deformed by a certain amount or more. According to claim 1,
The carrier has a slide groove corresponding to the protrusion formed on both sides of the pair of pad plates, respectively, and the coupling jaw is provided on an upper side of the slide groove,
The pad spring is
a guide part inserted into the slide groove to slidably support the protrusion;
a support portion extending bent from the lower end of the guide portion to elastically support the lower end of the protrusion; and
Pad spring including a; a coupling portion extending bent from an upper portion of the guide portion and coupled to surround the coupling jaw. 5. The method of claim 4,
The coupling part,
A first clip portion that is in close contact with one surface of the engaging jaw facing the disk, a second clip portion that is in close contact with the other surface of the engaging jaw, and a third clip portion coupled to the upper surface of the engaging jaw to limit the movement of the pad spring Pad spring provided. 6. The method of claim 5,
A restraining groove is formed on the upper surface of the coupling jaw in the direction of movement of the pad plate,
The third clip part has a restraining piece protruding toward the restraint groove,
The restraint piece is a pad spring having an end inclined downward so as to be caught on one end surface of the restraint groove. 5. The method of claim 4,
The return portion is a pad spring formed in the guide portion. 8. The method of claim 7,
The guide part is provided with cutouts formed by cutting the upper and lower sides of the return part to facilitate elastic deformation of the return part. a pair of pad plates to which friction pads are attached so as to compress both sides of the disk rotating together with the wheel;
a carrier having a slide groove into which protrusions formed on both sides of each pad plate are fitted so that the pair of pad plates are installed so as to move forward and backward toward the disk, and a coupling protrusion formed on an upper side of the slide groove;
a caliper housing that is slidably mounted on the carrier and operates the pair of pad plates; and
a pad spring interposed between the carrier and a pair of pad plates, each coupled to the coupling jaw, and slidably supporting the pair of pad plates; and
and a return part extending from the edge of the pad spring to elastically support the protrusion of the pad plate and returning it to its original position;
The return part is elastically deformed when the pad plate is operated, and is provided to contact the disk when the friction pad is worn by a certain amount. 10. The method of claim 9,
The return unit,
a first extension portion extending toward the disk; and
and a second extension part having an end of the first extension part bent in a direction toward the pad plate and extending from the first extension part in a direction away from the disk. 11. The method of claim 10,
The second extension portion has a bent portion formed by bending to provide a contact surface at the end,
The end of the bent portion is provided to contact the disk when the return portion is elastically deformed by a predetermined amount or more. 10. The method of claim 9,
The pad spring is
a guide part inserted into the slide groove to slidably support the protrusion;
a support portion extending bent from the lower end of the guide portion to elastically support the lower end of the protrusion; and
Caliper brake comprising a; a coupling portion extending from an upper portion of the guide portion to be bent and coupled to surround the coupling jaw. 13. The method of claim 12,
The coupling part,
A first clip portion that is in close contact with one surface of the engaging jaw facing the disk, a second clip portion that is in close contact with the other surface of the engaging jaw, and a third clip portion coupled to the upper surface of the engaging jaw to limit the movement of the pad spring Caliper brakes provided. 14. The method of claim 13,
A restraining groove is formed on the upper surface of the coupling jaw in the direction of movement of the pad plate,
The third clip part has a restraining piece protruding toward the restraint groove,
The caliper brake is formed to be inclined downward so that the end of the restraint piece is caught on one end of the restraint groove. 13. The method of claim 12,
The return portion is a caliper brake formed in the guide portion. 16. The method of claim 15,
In order to facilitate elastic deformation of the return portion, the guide portion is provided with cutouts formed by cutting the upper and lower sides of the return portion.

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