Retraction spring and caliper brake including the same

Abstract

The invention relates to a retraction spring and a caliper brake including the same. The retraction spring includes: a pad coupling portion including a first arm and a second arm respectively contacting a front surface and a rear surface of the protruding portion, and a connecting portion connected between the first arm and the second arm; a body portion extending from the pad coupling portion and configured to provide an elastic restoring force; and a bracket support portion extending from the main body portion and supported by a coupling hook formed on the bracket. The first arm is bent at or from one side of the connection portion toward the front surface, the second arm is bent at or from the other side of the connection portion toward the rear surface, and the body portion is bent from the other side of the connection portion.

Description

Technical Field

[0001] Some embodiments of the present disclosure generally relate to a retraction spring and a caliper brake including the same, and more particularly, to a retraction spring capable of preventing a drag phenomenon when releasing a brake and a caliper brake including the same. Background Art

[0002] A brake system for performing braking must be installed to the vehicle, and various types of brake systems have been developed for the safety of passengers and cargo.

[0003] One of the examples of the braking system is a caliper brake. The caliper brake may be a braking system for generating a braking force by friction or clamping pressure between a brake disc and a brake pad, such that the caliper brake presses brake pads mounted at both sides of a brake disc that rotates with the wheel toward the brake disc. The caliper brake may include a caliper that covers the brake pad and is configured to allow the brake pad to move forward toward and backward from the brake disc, cylinder, and piston. The caliper brake presses the brake pad toward the brake disc by applying hydraulic pressure for braking to the inside of the cylinder or by moving the piston forward with the power of an electric motor.

[0004] The brake pad performs braking by approaching and contacting the brake disc, or releases braking by being spaced apart from or moving away from the brake disc, and the brake pad is elastically supported by the pad spring. In addition, the caliper brake may include a retraction device to return the brake pad to an original position or a brake release position when the brake is released, and the retraction device may be installed to provide an elastic restoring force to the brake pad or the pad plate.

[0005] The retraction device may be an important component for the performance and operational reliability of the caliper brake, as it may prevent dragging, a phenomenon where the brake disc is in continuous contact with the brake pad even when the brake is released. Summary of the invention

[0006] Therefore, an aspect of the present disclosure is to provide a retraction spring which is provided in a separate manner to easily make a structural change thereof, and a caliper brake including the same.

[0007] Another aspect of the present disclosure is to provide a retraction spring having improved restoring force and a caliper brake including the same.

[0008] Still another aspect of the present disclosure is to provide a retraction spring which can minimize material waste during manufacturing of the retraction spring and a caliper brake including the same.

[0009] Still another aspect of the present disclosure is to provide a retraction spring for easy assembly and maintenance, and a caliper brake including the same.

[0010] Yet another aspect of the present disclosure is to provide a retraction spring having improved operating performance and reliability, and a caliper brake including the same.

[0011] Additional aspects of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.

[0012] According to one aspect of the present disclosure, a retraction spring is connected to a protruding portion formed on both sides of a pad plate of a brake pad, and is configured to return the brake pad along an axial direction when the brake is released, the retraction spring comprising: a pad connecting portion, the pad connecting portion comprising a first arm and a second arm respectively contacting the front surface and the rear surface of the protruding portion, and a connecting portion arranged between the first arm and the second arm; a main body portion, the main body portion extends from the pad connecting portion and is configured to provide an elastic restoring force; and a bracket support portion, the bracket support portion extends from the main body portion and is supported by a connecting hook formed on the bracket, wherein the first arm is bent at one side of the connecting portion and extends toward the front surface, the second arm is bent at the other side of the connecting portion and extends toward the rear surface, and the main body portion is arranged to extend and bend from the other side of the connecting portion.

[0013] The connection portion may be disposed to face or contact a side surface of the protruding portion.

[0014] The connection portion may be disposed to face or contact a lower surface of the protruding portion.

[0015] The body portion may be formed by bending once toward the center from the pad coupling portion and bending twice outward.

[0016] The body portion may be axially bent three times and connected to the bracket support portion.

[0017] The body portion may be formed by bending once upward and twice downward from the pad coupling portion.

[0018] The body portion may be axially bent three times and connected to the bracket support portion.

[0019] The first arm may include a first inclined portion bent at one side of the connection portion and having an inclination close to the second arm, and a second inclined portion bent from the first inclined portion and having an inclination away from the second arm.

[0020] The second arm may include a third inclined portion bent at the other side of the connection portion and having an inclination close to the first arm, and a fourth inclined portion bent from the third inclined portion and having an inclination away from the first arm.

[0021] A minimum distance among distances between the first arm and the second arm may be set to be smaller than a thickness of the protruding portion.

[0022] The body portion may include at least one opening formed through the body portion.

[0023] The bracket support portion may include a first leg extending from the body portion and bending in one direction and a second leg extending from the body portion and bending in another direction.

[0024] The bracket support portion may include a first leg and a second leg, the first leg extending from the body portion and being at least partially cut and bent in one direction, and the second leg extending from the body portion and being bent in another direction.

[0025] The bracket support portion may include at least one bent portion extending from the body portion and bent on the body portion.

[0026] A caliper brake comprises: a pair of brake pads, each brake pad comprising a friction pad and a pad plate, the friction pads being arranged to press two side surfaces of a disc rotating with a wheel, the friction pads being attached to the pad plate; a bracket comprising a sliding groove and a coupling hook, protruding portions formed at both sides of the pad plate of each of the brake pads being fitted into the sliding groove, the coupling hook being formed around the sliding groove; and a retraction spring coupled to the protruding portion and configured to return the brake pad in an axial direction when the brake is released, wherein the retraction spring comprises: a pad coupling portion, the pad coupling portion comprising a sub- A first arm and a second arm respectively contacting the front surface and the rear surface of the protruding part, and a connecting part arranged between the first arm and the second arm, and the connecting part is arranged to face the side surface or the lower surface of the protruding part; a main body portion, which extends from the pad connecting portion and is configured to provide elastic restoring force; and a bracket support portion, which extends from the main body portion and is supported by the connecting hook, the first arm is bent at one side of the connecting portion and extends toward the front surface, at least a part of the second arm is bent at the other side of the connecting portion and extends toward the rear surface, and the main body portion is arranged to extend and bend from the other side of the connecting portion.

[0027] The main body portion may include: a first curved portion, which is bent from the pad connecting portion toward a portion corresponding to the center; a first flat portion, which extends from the first curved portion; a second curved portion, which is bent from the first flat portion along a direction corresponding to the outward direction; and a second flat portion, which extends from the second curved portion.

[0028] The body portion may further include a third bent portion bent from the second flat portion in a direction corresponding to the axial direction, and a third flat portion extending from the third bent portion and connected to the bracket support portion.

[0029] The main body portion may include: a first bent portion, which is bent from the pad connecting portion along a direction corresponding to an upward direction; a first flat portion, which extends from the first bent portion; a second bent portion, which is bent from the first flat portion along a direction corresponding to a downward direction; and a second flat portion, which extends from the second bent portion.

[0030] The body portion may further include a third bent portion bent from the second flat portion in a direction corresponding to the axial direction, and a third flat portion extending from the third bent portion and connected to the bracket support portion.

[0031] The bracket may be arranged such that a distance from the disc to the coupling hook of the protruding portion on which the inner brake pad is mounted is different from a distance from the disc to the coupling hook of the protruding portion on which the outer brake pad is mounted. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] These and / or other aspects of the present disclosure will become apparent and more readily understood through the following description of embodiments in conjunction with the accompanying drawings, in which:

[0033] Figure 1 is a perspective view schematically showing a caliper brake according to a first embodiment of the present disclosure;

[0034] Figure 2 is a front view schematically showing a caliper brake according to a first embodiment of the present disclosure;

[0035] Figure 3 is a perspective view schematically showing a retraction spring according to a first embodiment of the present disclosure;

[0036] Figure 4 is a cross-sectional view showing a caliper brake equipped with a retraction spring according to a first embodiment of the present disclosure;

[0037] Figure 5is a plan view schematically showing a caliper brake according to a first embodiment of the present disclosure;

[0038] Figure 6 is a front view schematically showing a caliper brake according to a second embodiment of the present disclosure;

[0039] Figure 7 is a perspective view schematically showing a retraction spring according to a second embodiment of the present disclosure;

[0040] Figure 8 is a plan view schematically showing a retraction spring according to a second embodiment of the present disclosure;

[0041] Fig. 9 is a perspective view schematically showing a retraction spring according to a third embodiment of the present disclosure;

[0042] Fig.10 is a plan view schematically showing a retraction spring according to a third embodiment of the present disclosure;

[0043] Fig.11 is a perspective view schematically showing a retraction spring according to a fourth embodiment of the present disclosure;

[0044] Fig.12 is a plan view schematically showing a retraction spring according to a fourth embodiment of the present disclosure;

[0045] Fig.13 is a perspective view schematically showing a retraction spring according to a fifth embodiment of the present disclosure;

[0046] Fig.14 is a plan view schematically showing a retraction spring according to a fifth embodiment of the present disclosure;

[0047] Fig.15 is a perspective view schematically showing a retraction spring according to a sixth embodiment of the present disclosure; and

[0048] Fig.16 is a plan view schematically showing a retraction spring according to a sixth embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The following embodiments are presented to fully convey the spirit of the present disclosure to those skilled in the art to which the present disclosure belongs. The present disclosure may also be specified in other forms and is not limited to the embodiments presented herein. In the accompanying drawings, in order to clarify the present disclosure, the description of parts not related to the description may be omitted, and the size of the parts may be slightly exaggerated to facilitate understanding.

[0050] Figure 1 is a perspective view schematically showing a caliper brake according to a first embodiment of the present disclosure, and Figure 2 : is a front view schematically showing a caliper brake according to a first embodiment of the present disclosure. Figure 3 is a perspective view schematically showing a retraction spring according to a first embodiment of the present disclosure, and Figure 4 and Figure 5 1 are a partial cross-sectional view and a plan view respectively showing a caliper brake equipped with a retraction spring according to the first embodiment of the present disclosure.

[0051] Reference Figures 1 to 5 , the caliper brake according to the embodiment of the present disclosure may include a pair of brake pads 100 and 200, a bracket 300, a caliper housing, and a retraction spring 10. The brake pads 100 and 200 may include pad plates 120 and 220 to which friction pads 110 and 210 are attached to press both side surfaces of a disc 50 that rotates with a vehicle. The bracket 300 may have a sliding groove, and a coupling hook 310 formed around the sliding groove, into which a protrusion 125 formed at both sides of the pad plates 120 and 220 of each of the brake pads 100 and 200 is movably or slidably fitted or inserted, so that the pair of brake pads 100 and 200 can move forward toward the disc 50 or move backward away from the disc 50. The caliper housing is slidably mounted on the bracket 300, and operates the pair of pad plates 120 and 220. The retraction spring 10 is coupled to the protruding portion 125 of the pair of brake pads 100 and 200 and is configured to return the brake pads 100 and 200 to their original positions or brake release positions in the axial direction when the brake is released.

[0052] Friction pads 110 and 210 that generate friction against the brake disc 50 are attached to inner surfaces of a pair of brake pads 100 and 200, respectively, and protrusions 125 are formed on both ends or sides of each of the pad plates 120 and 220. The pair of brake pads includes an outer brake pad 100 disposed to contact or be associated with a finger portion of a caliper and an inner brake pad 200 disposed to contact or be associated with a piston. Shims 130 may be disposed on outer surfaces of the brake pads 100 and 200.

[0053] The bracket 300 is fixedly coupled to a fixing device of the vehicle, such as a steering knuckle of the vehicle body, which is positioned adjacent to the outer circumference of the disc 50. Sliding grooves are formed in both inner portions of the bracket 300 at positions corresponding to the protruding portions 125 formed on both side surfaces of the pad plates 120 and 220 of the pair of brake pads 100 and 200, and coupling hooks 310 are formed around the sliding grooves. A pair of coupling hooks 310 are formed on both inner portions of the bracket 300, and thus the bracket 300 may have a total of four coupling hooks 310.

[0054] The guide holes are formed in parallel with the sliding grooves in or at both upper side portions of the bracket 300. The sliding grooves may be formed at both the front and rear portions of the bracket 300 so that a pair of brake pads 100 and 200 are mounted therein. Figure 1 and Figure 2 As shown in , the sliding grooves formed in or at both side portions of the bracket 300 are formed to be spaced apart or spaced apart from each other by a certain interval, and the sliding groove has an open center portion so that the disc 50 is rotatably positioned by being smoothly inserted therein. In addition, an outer beam and a main beam are formed under the sliding groove at the front and rear of the bracket 300, respectively, to withstand the torque generated during the braking operation.

[0055] The protrusion 125 is coupled by being movably or slidably fitted or inserted into the sliding groove of the bracket 300, so that the pair of brake pads 100 and 200 can slide along the sliding groove of the bracket 300. In other words, when each of the brake pads 100 and 200 moves forward or backward along the sliding groove of the bracket 300, each of the friction pads 110 and 210 is in close contact with both side surfaces of the disc 50 to generate braking force, or moves away from the disc 50 to release the braking force.

[0056] When guide rods mounted on both ends of the caliper housing are inserted into guide holes provided in or at both ends of the bracket 300, the caliper housing is slidably mounted in the bracket 300. The caliper housing includes a cylinder and a finger portion for pressing the outer brake pad 100, and a piston for pressing the inner brake pad 200 is mounted in or on the cylinder to move forward or backward.

[0057] The pad spring 400 may be coupled to the sliding groove of the bracket 300. The pad spring 400 may allow the protrusion 125 of the pad plates 120 and 220 coupled to the sliding groove of the bracket 300 to elastically support the sliding movement of the protrusion 125 along the sliding groove. The retraction spring 10 may be installed with the pad spring 400.

[0058] The retraction spring 10 is coupled to the protruding portion 125 of the pair of brake pads 100 and 200, and is configured to return the brake pads 100 and 200 in the axial direction when the brake is released. In other words, four retraction springs 10 may be coupled to the protruding portions 125 formed at both sides of the pad plates 120 and 220 of the pair of brake pads 100 and 200 to return the brake pads 100 and 200 to their original positions or brake release positions in the axial direction when the brake is released.

[0059] Reference Figure 3 , the retraction spring 10 according to the first embodiment of the present disclosure may include a pad coupling portion, a main body portion 1140, and a bracket support portion 1150. The pad coupling portion may include a first arm 1120 and a second arm 1130 that contact or couple with the front and rear surfaces of the protruding portion 125 of the brake pads 100 and 200, respectively, and a connecting portion 1110 that faces or contacts the side surfaces of the protruding portion 125 of the brake pads 100 and 200. The main body portion 1140 may extend from the pad coupling portion and may be configured to provide an elastic restoring force. The bracket support portion 1150 may extend from the main body portion 1140 and may be supported by the coupling hook 310.

[0060] Reference Figure 3 and Figure 4 , the first arm 1120 of the retraction spring 10 is bent at or from one side or one end of the connecting portion 1110 and extends toward the protruding portion 125 or the brake pads 100 and 200, and at least a portion of the second arm 1130 is cut and bent at or from the other side or the other end of the connecting portion 1110 and extends toward the protruding portion 125 or the brake pads 100 and 200. The first arm 1120 and the second arm 1130 may extend in a direction substantially parallel to the protruding portion 125 or the brake pads 100 and 200 and / or substantially perpendicular to the connecting portion 1110 of the retraction spring 10.

[0061] In other words, the first arm 1120 and the second arm 1130 may both have shape, the The shape is bent and extended at or from both sides of the connection portion 1110 formed between the first arm 1120 and the second arm 1130 toward the protruding portion 125. Figure 4, the first arm 1120 of the retraction spring 10 may contact or couple with the front surface of the protrusion 125 (i.e., the inner surface of the protrusion 125 facing the disk 50), the second arm 1130 of the retraction spring 10 may contact or couple with the rear surface of the protrusion 125 (i.e., the outer surface of the protrusion 125 positioned farther from the disk 50 than the first arm 1120), and the connecting portion 1110 may face or contact with the side surface of the protrusion 125. The connecting portion 1110 is connected between the first arm 1120 and the second arm 1130. The first arm 1120 may be formed to be bent at or from one side or one end of the connection portion 1110 and extend toward the front surface of the protruding portion 125 to support or face the front surface of the protruding portion 125, and the second arm 1130 may be formed by cutting and bending at least a portion at the other side of the connection portion 1110 and extend toward the rear surface of the protruding portion 125 to support or face the rear surface of the protruding portion 125. In addition, the body portion 1140 is connected to the other side of the connection portion 1110 and is formed to extend from the other side of the connection portion 1110.

[0062] Reference Figure 4 In the first embodiment of the present disclosure, the first arm 1120 may have a curved shape including a first inclined portion, the first inclined portion being bent at or from one side or one end of the connection portion 1110 toward the second arm 1130 and having an inclination close to the second arm 1130, and a second inclined portion being bent away from the second arm 1130 and having an inclination away from the second arm 1130. In other words, the first arm 1120 may have a shape in which a connection portion of the first inclined portion and the second inclined portion of the first arm 1120 protrudes toward the second arm 1130. In this case, in a state where the retraction spring 10 is not connected to the protrusion 125 of the brake pads 100 and 200, the closest distance between the first arm 1120 and the second arm 1130 can be set to be narrower or smaller than the thickness of the protrusion 125, and therefore, when the protrusion 125 is inserted between the first arm 1120 and the second arm 1130, the first inclined portion and the second inclined portion of the first arm 1120 can be elastically deformed, and therefore, the protrusion 125 can be stably or firmly placed or connected between the first arm 1120 and the second arm 1130 by their elastic restoring force.

[0063] The body part 1140 may be connected to the other side or the other end of the connection portion 1110 and formed to extend from the other side or the other end of the connection portion 1110 .

[0064] The main body portion 1140 may be bent into a shape having a generally continuously bent shape, one end of which is connected to and extends from the pad coupling portion, and the other end of which is connected to and extends to the bracket support portion 1150. The main body portion 1140 is configured to return the brake pads 100 and 200 when the brake pads 100 and 200 are released by generating an elastic restoring force when the brake pads 100 and 200 slide along the sliding groove of the bracket 300 in a state where the bracket support portion 1150 is supported by a coupling hook formed around the sliding groove of the bracket 300 and the pad coupling portion is coupled to the protruding portion 125 of the brake pads 100 and 200. For example, referring to Figure 4 When the brake pad 100 slides in the direction A during braking, the main body 1140 is elastically deformed in the direction B, and when the brake is released, the brake pad 100 is returned to its original position by the elastic restoring force of the main body 1140 .

[0065] The body portion 1140 may have a curved shape to provide appropriate elastic restoring force to the brake pad 100 .

[0066] The main body portion 1140 may be bent once from the pad coupling portion toward the center (e.g., the center of the brake pad 100) or a portion corresponding to the center, bent twice outward (e.g., in a direction away from the center of the brake pad 100) or in a direction corresponding to the outward direction, and bent three times in an axial direction (e.g., perpendicular to the brake pad 100 direction) or in a direction corresponding to the axial direction to connect and extend to the bracket support portion 1150. In addition, at least a portion of the main body portion 1140 may be formed to extend flatly between the bent portions. The main body portion 1140 may have one or more openings 1145 formed to pass through the main body portion 1140. The opening 1145 may be formed to pass through the curved strip-shaped main body portion 1140, and the size or strength of the elastic restoring force that can be generated by the main body portion 1140 may be adjusted by changing the number and size of the opening 1145. The opening 1145 may be provided as a plurality of openings, and the plurality of openings 1145 may be provided to be spaced apart by a certain distance or spaced apart from each other by a certain distance in the horizontal direction of the main body portion 1140.

[0067] The bracket support portion 1150 is supported by the coupling hooks 310 and 320 formed on the bracket 300. The bracket support portion 1150 may include a first leg 1151 extending from the body portion 1140 and bent in one direction, and a second leg 1152 extending from the body portion 1140 and bent in another direction. Figure 3As shown in , at least a portion of the first leg 1151 of the bracket support portion 1150 can be provided by cutting and bending a portion of the bracket support portion 1150 in one direction, and the second leg 1152 of the bracket support portion 1150 can be provided by bending another portion of the bracket support portion 1150 in another direction. As described above, by manufacturing the first leg 1151 and the second leg 1152 by cutting between the first leg 1151 and the second leg 1152 and bending the first leg 1151 and the second leg 1152 in different directions, material waste can be reduced, and stable support of the retraction spring 10 on the bracket 300 can be achieved.

[0068] As described above, since the retraction spring 10 according to the first embodiment of the present disclosure may include a pad coupling portion, a main body portion 1140, and a bracket support portion 1150 formed by being cut and / or bent, material waste may be reduced during the manufacture of the retraction spring 10, and the process of manufacturing the retraction spring 10 may be simplified. The caliper brake according to the first embodiment of the present disclosure may differently set or adjust the restoring force applied to the inner brake pad 200 and the outer brake pad 100 without changing the retraction spring 10. The inner brake pad 200 may be pressed directly or indirectly by the piston, and the outer brake pad 100 may be pressed by a reaction force according to the operation of the finger-shaped portion of the caliper housing. Therefore, when the brake is released, different restoring forces for returning the brake pads 100 and 200 may be required. In order to differently set or provide the restoring forces applied to the outer brake pad 100 and the inner brake pad 200, the bracket 300 of the caliper brake according to the first embodiment of the present disclosure may have asymmetric positions of the coupling hooks 310 and 320.

[0069] Specifically, refer to Figure 5 , a pair of brake pads 100 and 200 are coupled to the bracket 300 to press both side surfaces of the disc 50 , and the outer brake pad 100 is coupled to press the outer surface of the disc 50 by fitting the protrusion 125 of the outer brake pad 100 into the outer sliding groove of the bracket 300 .

[0070] Figure 5The retraction springs 11 to 14 shown in the figure may be implemented by the embodiment of the retraction spring 10 described above. Each of the retraction springs 11 and 12 is coupled to a corresponding protrusion in the protrusions 125 formed at both sides of the outer brake pad 100. In addition, the inner brake pad 200 is coupled to press or move away from the inner surface of the disc 50 by movably or slidably fitting or inserting the protrusions 125 into the inner sliding groove of the bracket 300. Each of the retraction springs 13 and 14 may be coupled to a corresponding protrusion in the protrusions 125 formed at both sides of the inner brake pad 200, and the retraction springs 11 and 12 coupled to the outer brake pad 100 and the retraction springs 13 and 14 coupled to the inner brake pad 200 may be provided as the same retraction spring 10. In this case, the bracket 300 may be disposed such that a distance from the disc 50 to the coupling hook 310 on which the outer brake pad 100 is mounted is different from a distance from the disc 50 to the coupling hook 320 on which the inner brake pad 200 is mounted. As described above, one side of the retraction spring 10 is coupled to the protruding portion 125 of the brake pads 100 and 200, and the other side of the retraction spring 10 is supported by the coupling hooks 310 and 320 of the bracket 300. In this case, when the coupling hook 320 is relatively far from the disc 50, even when the brake pad 200 is positioned at the same position, the deformation of the main body 1140 is relatively large, and thus a preload may be applied, and as a result, a relatively large restoring force is applied to the brake pad 200. On the contrary, when the coupling hook 320 is relatively close to the disc 50, even when the brake pad 100 is positioned at the same position, the deformation of the main body 1140 is relatively small, and thus a relatively small restoring force is applied to the brake pad 100. Specifically, referring to Figure 5 Each of the elastic restoring forces applied to the outer brake pad 100 and the inner brake pad 200 is determined according to the distance d2 from the disc 50 to the coupling hook 310 around the sliding groove coupled with the outer brake pad 100 and the distance d1 from the disc 50 to the coupling hook 320 around the sliding groove coupled with the inner brake pad 200. Figure 5 As shown in , since the distance d1 to the coupling hook 320 around the sliding groove coupled to the inner brake pad 200 is set to be larger than the distance d2 to the coupling hook 310 around the sliding groove coupled to the outer brake pad 100, the main body 1140 of the retraction spring 10 provided at the inner brake pad 200 side can have a larger deformation during the braking operation, and thus the inner brake pad 200 can have a larger restoring force than the outer brake pad 100, thereby preventing uneven wear of the brake pads 100 and 200 and achieving a stable braking operation.

[0071] Hereinafter, a retraction spring and a caliper brake having the same according to a second embodiment of the present disclosure will be described.

[0072] Figure 6 : is a front view schematically showing a caliper brake according to a second embodiment of the present disclosure. Figure 7 and Figure 8 are a perspective view and a plan view showing a retraction spring according to a second embodiment of the present disclosure.

[0073] Reference Figures 6 to 8 The retraction spring 10 according to the second embodiment of the present disclosure may be disposed such that the connection portion 1210 of the pad coupling portion faces or contacts the lower surface of the protruding portion 125 of the brake pads 100 and 200 .

[0074] The following description of the second embodiment of the present disclosure except for the additional description is the same as or similar to the above description of the first embodiment of the present disclosure, and thus will be omitted to prevent overlapping contents.

[0075] Reference Figures 6 to 8 The retraction spring 10 according to the second embodiment of the present disclosure may include a pad coupling portion, a body portion 1240 and a bracket support portion 1250. The pad coupling portion may include a connecting portion 1210, a first arm 1220 and a second arm 1230.

[0076] The first arm 1220 according to the second embodiment may be bent at or from one side or end of the connection portion 1210 and may extend toward the protruding portion 125 or the brake pads 100 and 200, and at least a portion of the second arm 1230 may be cut and bent at or from the other side or end of the connection portion 1210 and may extend toward the protruding portion 125 or the brake pads 100 and 200. The first arm 1220 and the second arm 1230 may extend in a direction substantially parallel to the protruding portion 125 or the brake pads 100 and 200 and / or substantially perpendicular to the connection portion 1210 of the retraction spring 10. In addition, a body portion 1240 to be described below is connected to the other side or end of the connection portion 1210 and is formed to extend from the other side or end of the connection portion 1210.

[0077] The first arm 1220 may have a curved shape including a first inclined portion, the first inclined portion being bent at or from one side or end of the connection portion 1210 toward the second arm 1230 and having an inclination close to the second arm 1230, and a second inclined portion being bent away from the second arm 1230 and having an inclination away from the second arm 1230. The second arm 1230 may have a curved shape including a third inclined portion being bent at or from the other side or end of the connection portion 1210 toward the first arm 1220 and having an inclination close to the first arm 1220, and a fourth inclined portion being bent away from the first arm 1220 and having an inclination away from the first arm 1220. In other words, the first arm 1220 may have a shape in which a connecting portion of the first inclined portion and the second inclined portion of the first arm 1220 protrudes toward the second arm 1230, the second arm 1230 may have a shape in which a connecting portion of the third inclined portion and the fourth inclined portion of the second arm 1230 protrudes toward the first arm 1220, and the protruding connecting portions of the first arm 1220 and the second arm 1230 may be disposed at positions facing or corresponding to each other so as to be fixedly or securely connected to the protruding portion 125 of the brake pads 100 and 200 inserted between the first arm 1220 and the second arm 1230. In this case, in a state where the retraction spring 10 is not connected to the protrusion 125 of the brake pads 100 and 200, the closest distance d between the first arm 1220 and the second arm 1230 can be set to be narrower or smaller than the thickness of the protrusion 125. Therefore, when the protrusion 125 is inserted between the first arm 1220 and the second arm 1230, the first to fourth inclined portions can be elastically deformed, and thus the protrusion 125 can be stably or firmly placed or connected between the first arm 1220 and the second arm 1230 by their elastic restoring force.

[0078] The main body portion 1240 may be connected to the other side or the other end of the connection portion 1210 and formed to extend from the other side or the other end of the connection portion 1210. In the second embodiment, the main body portion 1240 may be bent into a substantially continuously bent shape, one end of which is connected to and extends from the pad coupling portion, and the other end is connected to and extends to the bracket support portion 1250. Specifically, the main body portion 1240 may be bent once upward or in a direction corresponding to the upward direction from the pad coupling portion, twice downward or in a direction corresponding to the downward direction, and three times in an axial direction or in a direction corresponding to the axial direction to connect and extend to the bracket support portion 1250.

[0079] In addition, the main body 1240 may have one or more openings 1245 formed through the main body. The opening 1245 may be formed through the curved strip-shaped main body 1240, and the size or strength of the elastic restoring force that can be generated by the main body 1240 can be adjusted by changing the number and size of the openings 1245. The opening 1245 may be provided as a plurality of openings, and the plurality of openings 1245 may be provided to be spaced apart by a certain distance or spaced apart from each other by a certain distance in the horizontal direction of the main body 1240.

[0080] The bracket support portion 1250 may include a bent portion 1252 bent in a direction opposite to the direction in which the end of the body portion 1240 extends, and an extension portion 1251 extending from the bent portion 1252. In other words, the bent portion 1252 and the extension portion 1251 may be formed in a substantially "U" shaped cross-sectional shape so that the outer end of the bent portion 1252 may contact the bracket 300 and be supported by the bracket 300.

[0081] Hereinafter, a retraction spring according to a third embodiment of the present disclosure will be described.

[0082] Fig. 9 and Fig.10 are a perspective view and a plan view showing a retraction spring according to a third embodiment of the present disclosure.

[0083] Reference Fig. 9 and Fig.10 The retraction spring 10 according to the third embodiment may include a pad coupling portion, a body portion 1340 , and a bracket support portion 1350 . The pad coupling portion may include a connection portion 1310 , a first arm 1320 , and a second arm 1330 .

[0084] The following description of the third embodiment of the present disclosure except for the additional description is the same as or similar to the above description of the first and second embodiments of the present disclosure, and thus will be omitted to prevent overlapping contents.

[0085] Reference Fig. 9 and Fig.10The bracket support portion 1350 according to the third embodiment may include a first curved portion 1351 and a second curved portion 1352, the first curved portion extending from the end of the main body portion 1340 and bending toward the pad coupling portion, and the second curved portion extending from the first curved portion 1351 and bending in a direction substantially opposite to or different from the first curved portion 1351. In other words, the first curved portion 1351 and the second curved portion 1352 may be bent in substantially opposite or different directions to form a Z-shape. A substantially stepped shape or portion may be formed by forming the first curved portion 1351 and the second curved portion 1352 in a Z-shape, and the coupling hook 310 of the bracket 300 may be supported by contacting with the stepped portion of the bracket support portion 1350.

[0086] The width of the bracket support portion 1350 may be narrower or smaller than the width of the body portion 1340. Therefore, even when the space in the coupling hook 310 of the bracket 300 is small or narrow, the bracket support portion 1350 of the retraction spring 10 may be easily coupled to or in contact with the coupling hook 310 and seated on the coupling hook 310 to stably support the retraction spring 10.

[0087] Hereinafter, a retraction spring according to a fourth embodiment of the present disclosure will be described.

[0088] Fig.11 and Fig.12 are a perspective view and a plan view showing a retraction spring according to a fourth embodiment of the present disclosure.

[0089] Reference Fig.11 and Fig.12 The retraction spring 10 according to the fourth embodiment includes a pad coupling portion, a body portion 1440 and a bracket support portion 1450. The pad coupling portion may include a connection portion 1410, a first arm 1420 and a second arm 1430.

[0090] The following description of the fourth embodiment of the present disclosure except for the additional description is the same as or similar to the above description of the first to third embodiments of the present disclosure, and thus will be omitted to prevent overlapping contents.

[0091] Reference Fig.11 and Fig.12 , the body portion 1440 according to the fourth embodiment may be bent to have a plurality of flat portions from the pad coupling portion to the bracket supporting portion 1450 and one or more bent portions connecting the plurality of flat portions.

[0092] The body part 1440 may include a first bent portion 1441 , a first flat portion 1442 , a second bent portion 1443 , a second flat portion 1444 , a third bent portion 1445 , and a third flat portion 1446 .

[0093] In one example in which the connecting portion 1410 is configured to face or contact the side surface of the protruding portion 125 of the brake pads 100 and 200, the first curved portion 1441 is bent from the brake pad connecting portion toward the center (e.g., the center of the brake pad 100), the first flat portion 1442 extends from the first curved portion 1441, the second curved portion 1443 is bent outward (e.g., in a direction away from the center of the brake pad 100) from the first flat portion 1442, the second flat portion 1444 extends from the second curved portion 1443, the third curved portion 1445 is bent axially (e.g., in a direction perpendicular to the brake pad 100) from the second flat portion 1444 and faces the bracket 300, and the third flat portion 1446 extends from the third curved portion 1445 to the bracket support portion 1450.

[0094] In another example in which the connecting portion 1410 is configured to face or contact a lower surface of the protruding portion 125 of the brake pads 100 and 200, a first bent portion 1441 is bent upward from the brake pad coupling portion, a first flat portion 1442 extends from the first bent portion 1441, a second bent portion 1443 is bent downward from the first flat portion 1442, a second flat portion 1444 extends from the second bent portion 1443, a third bent portion 1445 is axially bent from the second flat portion 1444 and faces the bracket 300, and a third flat portion 1446 extends from the third bent portion 1445 to the bracket support portion 1450.

[0095] Hereinafter, a retraction spring according to a fifth embodiment of the present disclosure will be described.

[0096] Fig.13 and Fig.14 are a perspective view and a plan view showing a retraction spring according to a fifth embodiment of the present disclosure.

[0097] Reference Fig.13 and Fig.14 The retraction spring 10 according to the fifth embodiment may include a pad coupling portion, a body portion 1540 , and a bracket support portion 1550 . The pad coupling portion may include a connecting portion 1510 , a first arm 1520 , and a second arm 1530 .

[0098] The following description of the fifth embodiment of the present disclosure except for the additional description is the same as or similar to the above description of the first to fourth embodiments of the present disclosure, and thus will be omitted to prevent overlapping contents.

[0099] Reference Fig.13 and Fig.14, the body portion 1540 according to the fifth embodiment may be bent to have a plurality of flat portions from the pad coupling portion to the bracket supporting portion 1550 and one or more bent portions connecting the plurality of flat portions.

[0100] The body part 1540 may include a first flat portion 1541 , a first bent portion 1542 , a second flat portion 1543 , a second bent portion 1544 , and a third flat portion 1545 .

[0101] In one example in which the connecting portion 1510 is configured to face or contact the side surface of the protruding portion 125 of the brake pads 100 and 200, the first flat portion 1541 extends from the pad connecting portion toward a portion corresponding to the center (e.g., the center of the brake pad 100), the first curved portion 1542 is bent from the first flat portion 1541 along a direction corresponding to the outward direction (e.g., along a direction away from the center of the brake pad 100), the second flat portion 1543 extends from the first curved portion 1542, the second curved portion 1544 is bent axially (e.g., in a direction perpendicular to the brake pad 100) from the second flat portion 1543 and faces the bracket 300, and the third flat portion 1545 extends from the second curved portion 1544 to the bracket supporting portion 1550, so that the cross-sectional shape of the main body portion 1540 can be a triangle with rounded corners.

[0102] In another example in which the connecting portion 1510 is configured to face or contact the lower surface of the protruding portion 125 of the brake pads 100 and 200, the first flat portion 1541 is bent and extends from the pad connecting portion in a direction corresponding to the upward direction, the first bent portion 1542 is bent from the first flat portion 1541 in a direction corresponding to the downward direction, the second flat portion 1543 extends from the first bent portion 1542, the second bent portion 1544 is axially bent from the second flat portion 1543 and faces the bracket 300, and the third flat portion 1545 extends from the second bent portion 1544 to the bracket support portion 1550.

[0103] Hereinafter, a retraction spring according to a sixth embodiment of the present disclosure will be described.

[0104] Fig.15 and Fig.16 are a perspective view and a plan view showing a retraction spring according to a sixth embodiment of the present disclosure.

[0105] Reference Fig.15 and Fig.16 The retraction spring 10 according to the sixth embodiment includes a pad coupling portion, a body portion 1640 and a bracket support portion 1650. The pad coupling portion may include a connection portion 1610, a first arm 1620 and a second arm 1630.

[0106] The following description of the sixth embodiment of the present disclosure except for the additional description is the same as or similar to the above description of the first to fifth embodiments of the present disclosure, and thus will be omitted to prevent overlapping contents.

[0107] Reference Fig.15 and Fig.16 , the body portion 1640 according to the sixth embodiment may be bent to have a plurality of flat portions from the pad coupling portion to the bracket supporting portion 1650 and one or more bent portions connecting the plurality of flat portions.

[0108] The body part 1640 may include a first flat portion 1641 , a first bent portion 1642 , and a second flat portion 1643 .

[0109] In one example in which the connecting portion 1610 is disposed to face or contact the side surface of the protruding portion 125 of the brake pad 100, the first flat portion 1641 is bent from the pad coupling portion and extends to a portion corresponding to the center (e.g., the center of the brake pad 100), the first bent portion 1642 is bent from the first flat portion 1641 in a direction corresponding to the outward direction (e.g., in a direction away from the center of the brake pad 100), and the second flat portion 1643 extends from the first bent portion 1642, and the bracket support portion 1650 is bent axially (e.g., in a direction substantially perpendicular to the brake pad 100) from the second flat portion 1643 to face the bracket 300. Fig.16 As shown in , the first flat portion 1641 and the second flat portion 1643 may be disposed substantially parallel to each other in a cross section of the body portion 1640 .

[0110] In another example in which the connecting portion 1610 is disposed to face or contact the lower surface of the protruding portion 125 of the brake pad 100, the first flat portion 1641 is bent and extended from the pad coupling portion in a direction corresponding to the upward direction, the first bent portion 1642 is bent from the first flat portion 1641 in a direction corresponding to the downward direction, and the second flat portion 1643 extends from the first bent portion 1642, and the bracket support portion 1650 is axially bent from the second flat portion 1643 to face the bracket 300. Fig.16 As shown in , the first flat portion 1641 and the second flat portion 1643 may be disposed substantially parallel to each other in a cross section of the body portion 1640 .

[0111] As is apparent from the above description, in the retraction spring and the caliper brake including the same according to some embodiments of the present disclosure, the retraction spring may be provided in a separate manner, and thus a change or adjustment of the retraction spring structure may be easily performed.

[0112] In a retraction spring and a caliper brake including the same according to certain embodiments of the present disclosure, excellent restoring force may be utilized to improve braking performance.

[0113] In a retraction spring and a brake caliper including the same according to some embodiments of the present disclosure, it is possible to minimize material waste during the manufacture of the retraction spring and reduce the manufacturing cost of the retraction spring.

[0114] In a retraction spring and a brake caliper including the same according to certain embodiments of the present disclosure, the assemblability of the retraction spring and the brake caliper can be improved, and easy maintenance of the retraction spring can be achieved.

[0115] In a retraction spring and a caliper brake including the same according to some embodiments of the present disclosure, the operating performance and product reliability of the caliper brake may be improved.

Claims

1. A retraction spring, comprising: a pad coupling portion coupled to a protruding portion of a brake pad, the pad coupling portion including a first arm and a second arm supporting a front surface and a rear surface of the protruding portion of the brake pad, respectively, and a connecting portion connected between the first arm and the second arm; a main body portion extending from the pad coupling portion and configured to provide an elastic restoring force; as well as a bracket support portion extending from the main body portion and supported by a coupling hook formed on a bracket to which the brake pad is movably mounted, in, The first arm of the pad coupling portion is bent from one side of the connecting portion toward a front surface of the protruding portion of the brake pad, The second arm of the pad coupling portion is bent from the other side of the connecting portion toward the rear surface of the protruding portion of the brake pad, and The body portion is bent from the other side of the connection portion connected between the first arm and the second arm of the pad coupling portion.

2. The retraction spring according to claim 1, wherein: The connecting portion connected between the first arm and the second arm of the pad coupling portion is positioned to face or contact a side surface of the protruding portion of the brake pad, and The body portion extending from the pad coupling portion has a first curved portion and a second curved portion, the first curved portion being curved from the pad coupling portion toward a center of the brake pad, and the second curved portion being curved away from the center of the brake pad.

3. The retraction spring according to claim 2, wherein: The body portion extending from the pad coupling portion further includes a third bent portion bent in a direction substantially perpendicular to the brake pad to be connected to the bracket supporting portion.

4. The retraction spring according to claim 1, wherein: The first arm of the pad coupling portion includes a first inclined portion and a second inclined portion, wherein the first inclined portion is bent from one side of the connecting portion and inclined toward the second arm of the pad coupling portion, and the second inclined portion is bent from the first inclined portion and inclined away from the second arm of the pad coupling portion.

5. The retraction spring according to claim 4, wherein: The second arm of the pad connection portion includes a third inclined portion and a fourth inclined portion, wherein the third inclined portion is bent from the other side of the connecting portion and is inclined toward the first arm of the pad connection portion, and the fourth inclined portion is bent from the third inclined portion and is inclined away from the first arm of the pad connection portion.

6. The retraction spring according to claim 1, wherein: The body portion extending from the pad coupling portion has at least one opening.

7. The retraction spring according to claim 1, wherein: The bracket support portion comprises: a first leg extending from the main body and bending in one direction; and A second leg extends from the main body portion and is bent in another direction different from the one direction in which the first leg is bent.

8. The retraction spring according to claim 1, wherein: The bracket supporting portion includes at least one bent portion extending from the body portion extending from the pad coupling portion and bent.

9. A caliper brake, comprising: a pair of brake pads configured to be movable relative to the rotor and having protruding portions protruding from sides of the brake pads; a bracket including a sliding groove and a coupling hook, the protruding portion of the brake pad being movably disposed in the sliding groove, and the coupling hook being formed around the sliding groove; as well as a retraction spring coupled to one of the protruding portions of the brake pad and configured to return one of the brake pads during a brake release operation, Wherein, the retraction spring comprises: a pad coupling portion coupled to the one of the protruding portions of the brake pad, the pad coupling portion comprising a first arm and a second arm respectively supporting a front surface and a rear surface of the one of the protruding portions of the brake pad and a connecting portion connected between the first arm and the second arm, and the connecting portion is disposed to face a side surface or a lower surface of the one of the protruding portions of the brake pad; a main body portion extending from the pad coupling portion and configured to provide an elastic restoring force; and a bracket support portion extending from the main body portion and supported by one of the coupling hooks, the first arm of the pad coupling portion is bent from one side of the connecting portion toward a front surface of the one of the protruding portions of the brake pad, At least a portion of the second arm of the pad coupling portion is bent from the other side of the connecting portion toward a rear surface of the one of the protruding portions of the brake pad, and The body portion is bent from the other side of the connection portion connected between the first arm and the second arm of the pad coupling portion.

10. The brake caliper according to claim 9, wherein: The bracket is configured so that a distance from the rotor to the coupling hook provided with the protruding portion of one of the pair of brake pads is different from a distance from the rotor to the coupling hook provided with the protruding portion of the other of the pair of brake pads.

Images