BRAKE PAD GUIDE FOR A BRAKE DEVICE

Abstract

Brake pad guide (100) for a braking device, comprising: a body part (110) which is brought into contact with a torque element (10), a pair of insert parts (120) connected to the body part (110) such that a part of the torque element (10) is inserted into the insert parts (120); a pair of guide members (130) each connected to the pair of insert members (120) and configured to guide a brake pad; a pair of support members (140) each connected to the pair of guide members (130) and adapted to support the brake pad (20); and a pair of return parts (150) each connected to the pair of insert parts (120) located on facing sides of the insert parts (120) and arranged to provide a return force at the same point of the brake pad upon movement of the brake pad (20), wherein each of the return parts (150) comprises: a first return part (151) extending from each of the facing sides of the insert parts (120) so as to be inclined towards the corresponding support part (104); a reset connection part (152) connected to the first reset part (151); and a second return part (153) connected to the return connection part (152) and extending in the opposite direction of the first return part (151), wherein a play between the first and second return parts (151,153) increases as the location of the play is away from the return connection part (152), characterized by that the return part (150) further comprises a contact projection (155) which is formed on the second return part (153) and is brought into point contact with the brake pad (20).

Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This application claims priority to Korean Patent Application No. 10-2019-0108681, filed with the Korean Intellectual Property Office on September 3, 2019. BACKGROUND 1. Technical field

[0002] Embodiments of the present disclosure relate to a brake pad guide for a braking device, and more particularly to a brake pad guide for a braking device capable of generating a uniform restoring force upon release of a brake pad. 2. Related technology

[0003] Generally, a brake caliper of a braking device refers to a part that presses against a brake disc and provides braking force when a pedal is depressed. The brake caliper is formed from a plurality of parts.

[0004] Among these parts of the brake caliper, a brake pad guide includes a return part for returning a brake pad to its original position using a spring force. However, if the return part presses the brake pad to the opposite side of the brake disc using a return spring force, the pressurization position at which the brake pad is pressurized may change. In this case, a uniform return force cannot be generated.

[0005] The related art of the present disclosure is disclosed in Korean Patent Laid-Open No. 10-2009-0078675, published on July 20, 2009, entitled "Brake device for vehicle." CN 106763341 A discloses a brake pad guide for a brake device having the features of the preamble of claim 1. JP 2015-148318 A, JP H08-261261 A, JP 2010-060063 A, and KR 102018133140 A disclose other brake pad guides. DESCRIPTION OF THE INVENTION

[0006] Various embodiments relate to a pad guide or brake pad guide for a braking device that can generate a uniform restoring force upon release of a brake pad. The invention is defined by the features of claim 1.

[0007] In one embodiment, a brake pad guide for a braking device comprises: a body part which is brought into contact with a torque element; a pair of insert parts which are connected to the body part such that a part of the torque element is inserted into the insert parts; a pair of guide parts which are respectively connected to the pair of insert parts and are configured to guide a brake pad; a pair of support parts which are respectively connected to the pair of guide parts and are configured to support the brake pad; and a pair of return parts which are respectively connected to the pair of insert parts, which are located on facing sides of the insert parts and are configured to provide a return force at the same point of the brake pad when the brake pad is moved.

[0008] Each of the return members includes: a first return member extending from each of the facing sides of the insert members so as to be inclined toward the corresponding support member; a return link member connected to the first return member; and a second return member connected to the return link member and extending in the opposite direction of the first return member. The clearance between the first and second return members may increase once the location of the clearance is away from the return link member.

[0009] When an external force is applied to the brake pad, the second return part can deform elastically and move toward the first return part. When the external force is no longer applied to the brake pad, the second return part can provide a return force to the brake pad, exerting pressure on the same point on the brake pad.

[0010] The first and second return parts may form a V-shape.

[0011] The second return part can be moved at the same height when it is moved towards the first return part and when it is moved away from the first return part.

[0012] The return part may further comprise a rigidity reinforcing part extending from the return connection part toward the second return part.

[0013] According to the invention, the return part may further comprise a contact projection which is formed on the second return part and is brought into point contact with the brake pad.

[0014] The body part may include: a body plate brought into contact with the torque element; and a pair of body extension parts extending from the body plate so as to be spaced apart from each other and respectively connected to the insert parts.

[0015] The body part may further include a contact part connected to the body plate between the pair of body extension parts, extending to the opposite side of the insert part, and brought into close contact with the torque element.

[0016] Each of the pair of insertion parts may include: a first insertion plate extending from one end of the body extension part so as to be bent to one side; a second insertion plate extending from one end of the first insertion plate so as to be bent toward the guide part; and a third insertion plate extending from one end of the second insertion plate and bent in the opposite direction of the first insertion plate so as to face the first insertion plate and connected to the guide part. The pair of return parts may be provided on facing sides of the pair of third insertion plates, respectively.

[0017] Each of the pair of insertion members may further include a first insertion guide member connected to the third insertion plate on the opposite side of the return member and extending from the third insertion plate so as to be inclined toward the body member toward one end thereof.

[0018] Each of the pair of guide members may include: a guide plate extending from the third insertion plate and connected to the support member; and a guide pressing member extending from one side of the guide plate to the opposite side of the first insertion plate and in close contact with the torque member.

[0019] Each of the pair of guide members may further include a second insertion guide member extending from the opposite side of each of the facing sides of the guide plates so as to be inclined at a predetermined angle.

[0020] In the brake pad guide for a brake device according to the embodiment of the present disclosure, when an external force for the brake pad is no longer applied by the V-shaped return part that extends obliquely from each of the facing sides of the insert parts to the guide part and is bent toward the insert part, the return part can pressurize the same position of the brake pad while being returned to the original state by the spring force, thereby generating a uniform return force in the brake pad.

[0021] Furthermore, because the rigidity of the return part is enhanced by the rigidity reinforcement part, the return part can deform stably and elastically or be restored to its original state by means of the spring force.

[0022] Because the return part is brought into point contact with the brake pad by the contact projection, the return part can also easily apply pressure to the same point of the brake pad. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view schematically illustrating a braking device according to an embodiment of the present disclosure. Fig. 2 is an exploded perspective view of the brake device according to the embodiment of the present disclosure. Fig. 3 is a perspective view showing a brake pad guide for the brake device according to the embodiment of the present disclosure. Fig. 4 is a front view of the brake pad guide for the brake device according to the embodiment of the present disclosure. Fig. 5 is a side cross-sectional view of the brake device according to the embodiment of the present disclosure. Fig. 6 is an enlarged view of a section AA' in Fig. 5. Fig. 7 is a view showing a state before a cylinder of the brake device according to the embodiment of the present disclosure is operated. Fig. 8 is a view showing a brake pad moved by an operation of the brake device according to the embodiment of the present disclosure. Fig. 9 is a view showing that the brake pad is returned to the original position when the operation of the cylinder of the brake device according to the embodiment of the present disclosure is released. Fig. 10 is a view showing that a return part of the brake pad guide for the brake device according to the embodiment of the present disclosure pressurizes the same point of the brake pad while being returned to the original position by a spring force. DETAILED DESCRIPTION

[0023] In the following, a brake pad guide for a braking device is described by various embodiments with reference to the drawings.

[0024] It should be noted that the drawings are not to scale and may be exaggerated in line thickness or component size for ease of description and understanding. Furthermore, the terms used herein are defined by considering the features of the invention and may be modified according to the habits and intentions of users or operators. Therefore, the definitions of the terms should be consistent with the entire disclosures set forth herein.

[0025] Fig. 1 is a perspective view schematically illustrating a braking device according to an embodiment of the present disclosure, Fig. 2 is an exploded perspective view of the brake device according to the embodiment of the present disclosure, Fig. 3 is a perspective view showing a brake pad guide for the brake device according to the embodiment of the present disclosure, Fig. 4 is a front view of the brake pad guide for the brake device according to the embodiment of the present disclosure, Fig. 5 is a side cross-sectional view of the brake device according to the embodiment of the present disclosure, Fig. 6 is an enlarged view of a section AA' in Fig. 5, Fig. 7 is a view showing a state before a cylinder of the brake device according to the embodiment of the present disclosure is operated, Fig. 8 is a view showing a brake pad moved by operating the brake device according to the embodiment of the present disclosure, Fig. 9 is a view showing that the brake pad is returned to the original position when the operation of the cylinder of the brake device according to the embodiment of the present disclosure is released, and Fig. 10 is a view showing that a return part of the brake pad guide for the brake device according to the embodiment of the present disclosure pressurizes the same point of the brake pad while being returned to the original position by a spring force.

[0026] Referring to the Fig. 1 to 5, a brake pad guide 100 for the brake device according to the embodiment of the present disclosure includes a body part 110, a pair of insertion parts 120, a pair of guide parts 130, a pair of support parts 140, and a pair of return parts 150. The brake pad guide 100 for the brake device may be formed of a metal material and formed as a body.

[0027] The body portion 110 is brought into contact with a torque element 10. The body portion 110 includes a body plate 111, a pair of body extension portions 112, a contact portion 113, and a pressure portion 114.

[0028] The body plate 111 is brought into contact with the torque element 10, and the pair of body extension parts 112 extend from the body plate 111 so that they are spaced from each other and connected to the respective insert parts 120. The pair of body extension parts 112 are spaced from the body part 110, extend downward (based on the Fig. 2 and Fig. 3), and is brought into contact with the torque element 10.

[0029] The contact part 113 is connected to the body plate 111 between the pair of body extension parts 112 and extends in the opposite direction of the insertion part 120. That is, the contact part 113 extends on the back side (based on Fig. 3) of the body part 110 and is brought into close contact with the torque element 10. The body part 110 may further include the pressing part 114. Therefore, the body part 110 can be reliably coupled to the torque element 10.

[0030] The insert part 120 is connected to the body part 110, and a torque element projection 11 of the torque element 10 is inserted into the insert part 120. In particular, the insert part 120 is formed in a U-shape, and the torque projection 11 is inserted into the insert part 120 (see Fig. 3). In the present embodiment, the pair of insert parts 120 are provided.

[0031] Because the torque element projection 11 is inserted into and coupled to the insert part 120, the body part 110 can be brought into close contact with the torque element 10.

[0032] The guide member 130 extends from the insert member 120 to one side and is brought into contact with the brake pad 20, and guides the movement of the brake pad 20. In the present embodiment, the pair of guide members 130 are provided.

[0033] The brake pad 20 has a brake pad bearing part 21 and a brake pad friction part 22.

[0034] The brake pad support member 21 includes a brake pad support member body 21a and a brake pad protrusion 21b. The brake pad support member body 21a can be coupled to a cylinder 40 and moved. The brake pad protrusion 21b extends from one end of the brake pad support member body 21a and is inserted into the guide member 130. The brake pad friction member 22 is attached to the brake pad support member 21 and is brought into contact with a brake disc 30 to provide friction.

[0035] The support member 140 extends from the guide member 130 so that it is bent in the same direction as the insert member 120 and supports the brake pad 20. The support member 140 extends from the bottom (based on Fig. 5) of the guide part 130 so that it is bent towards the brake pad 20 and supports the brake pad 20 when the brake pad 20 is moved (see Fig. 5).

[0036] The pair of return pieces 150 are each connected to the pair of insert pieces 120, positioned on facing sides of the insert pieces 120, and provide a return force at the same point of the brake pad 20 when the brake pad 20 is moved. In particular, a second return piece 153 is moved at the same height when it is moved toward a first return piece 151 and when it is moved away from the first return piece 151.

[0037] The return pieces 150 extend obliquely toward the guide pieces 130 from the facing sides of the insert pieces 120 and toward the insert pieces 120, and return the brake pad 20 to the original position by means of a spring force. In the present embodiment, the pair of return pieces 150 is provided.

[0038] In particular, the pair of return parts 150 extends downward from the sides of the insert parts 120 (based on the Fig. 2 and Fig. 3), and is formed in a V-shape.

[0039] Because the return member 150 has a V-shaped bending shape, the return member 150 can be installed even in a narrow space. Because two parts of the return member 150, namely the first and second return members 151 and 153, provide an elastic return force, the return member 150 can provide a larger return force than the return member 150 of the same size.

[0040] The return member 150 is formed of an elastic material and arranged between the brake pads 20, and has the brake pad 20 to be separated from the brake disc 30 by means of a spring force when an external force provided to the brake pad 20 by the cylinder 40 is no longer applied.

[0041] Here, the return part 150 can apply pressure to the brake pad 20 in such a way that the brake pad 20 is separated from the brake disc 30 when the return part 150 is returned to the original state by the spring force.

[0042] As described above, the return part 150 extends in a V-shape from the insert part 120. When the external force for the brake pad 20 is no longer applied, the return part 150 therefore applies pressure to the same point of the brake pad 20, while it is returned to the original state by the spring force (see Fig. 9 and Fig. 10). Therefore, a uniform restoring force can be generated for the brake pad 20.

[0043] The return part 150 includes the first return part 151, a return connection part 152, the second return part 153, and a rigidity reinforcement part 154. The first return part 151 extends obliquely toward the corresponding guide part 130 from each of the facing sides of the insert parts 120. Specifically, the first return part 151 extends from each of the facing sides of the third insert plates 123 of the insert parts 120 so as to be bent toward the back of the corresponding third insert plate 123.

[0044] The return connection part 152 is formed in a plate shape and connected to the first return part 151. The return connection part 152 is connected to the first return part 151 at one side and to the second return part 153 at the other side. The first and second return parts 151 and 153 are connected in the front-back direction of the return connection part 152 (based on Fig. 3).

[0045] The second return part 153 is connected to the return connection part 152 and extends obliquely toward the insertion part 120 so as to deviate from the first return part 151. The second return part 153 extends obliquely toward the third insertion plate 123 from the return connection part 152.

[0046] That is, the first return part 151 extends obliquely toward the corresponding support part 140 from each of the facing sides of the insertion parts 120, the return connection part 152 connects the first and second return parts 151 and 153, and the second return part 153 is connected to the return connection part 152 and extends in the opposite direction of the first return part 151.

[0047] The clearance between the first and second return parts 151 and 153 increases as the location of the clearance is away from the return link part 152.

[0048] The return member 150 further includes the rigidity-enhancing member 154 and a contact protrusion 155. The rigidity-enhancing member 154 extends from the return connection member 152 so that it is bent toward the second return member 153. Therefore, the rigidity of the return member 150 can be enhanced, allowing the return member 150 to stably and elastically deform or return to its original state by means of the spring force.

[0049] The contact protrusion 155 is formed on the second return part 153 and is brought into contact with the brake pad 20. Because the return part 150 is brought into point contact with the brake pad 20 by the contact protrusion 155, the return part 150 can easily apply pressure to the same point of the brake pad 20.

[0050] The insert member 120 includes a first insert plate 121, a second insert plate 122, and a third insert plate 123. In the present embodiment, the pair of insert members 120 is provided.

[0051] The first insertion plate 121 extends from one end of the body extension part 112 so that it is bent toward one side, that is, the front side of the body extension part 112.

[0052] The second insertion plate 122 extends from the first insertion plate 121 so that it is bent toward the guide part 130.

[0053] The third insertion plate 123 extends from one end of the second insertion plate 122 toward the opposite side of the first insertion plate 121, that is, the back side of the second insertion plate 122, so as to face the first insertion plate 121. The return part 150 extends from the third insertion plate 123, and the third insertion plate 123 is connected to the guide part 130. The torque element projection 11, which protrudes from the torque element 10, is inserted into a space formed by the first insertion plate 121, the second insertion plate 122, and the third insertion plate 123.

[0054] The insertion part 120 further includes a first insertion guide part 124. The first insertion guide part 124 extends from the opposite side of each of the facing sides of the third insertion plates 123 so as to be inclined at a predetermined angle to the first insertion plate 121.

[0055] That is, the first insertion guide part 124 is connected to the third insertion plate 123 on the opposite side of the return part 150, and extends from the third insertion plate 123 so as to be inclined toward the body part 110 toward the end thereof.

[0056] Therefore, when the brake pad 20 is mounted on the guide part 130, the brake pad 20 can be easily guided toward the guide part 130 and mounted on the guide part 130. When the torque element projection 11 is inserted into the insertion part 120, the torque element projection 11 can be prevented from moving in a horizontal direction.

[0057] The guide part 130 has a guide plate 131, a guide pressing part 132, and a second insertion guide part 133. The guide plate 131 extends from the third insertion plate 123 to one side and is connected to the support part 140. The guide plate 131 extends from one end of the third insertion plate 123 to the bottom side (based on Fig. 3) and is brought into contact with the torque element 10.

[0058] The guide pressing part 132 extends from one side or both sides of the guide plate 131 to the opposite side of the first insertion plate 121, that is, the back side of the guide plate 131, and is in close contact with the torque element 10. The guide pressing part 132 can press the torque element projection 11 inserted into the insertion part 120 by means of a spring force. Specifically, the guide pressing part 132 elastically deforms while the torque element projection 11 is inserted into the insertion part 120. Once the torque element projection 11 is inserted into the insertion part 120, the guide pressing part 132 is returned to its original state by the spring force and brought into close contact with the torque element projection 11, thereby pressing the torque element projection 11. Therefore, a coupling or connecting force between the insertion part 120 and the torque element projection 11 increases.

[0059] The second insertion guide member 133 extends from the opposite side of each of the facing sides of the guide plates 131 so as to be inclined at a predetermined angle to the front side of the corresponding guide plate 131. Therefore, when the brake pad 20 is mounted on the guide member 130, the brake pad 20 can be easily guided toward the guide member 130 and mounted on the guide member 130.

[0060] Hereinafter, the operation and effect of the braking device according to the embodiment of the present disclosure will be described with reference to Fig. 7 to 10 described.

[0061] When the brake pad guide 100 for the brake device is coupled to the torque element 10, the brake pad 20 is mounted. At this time, the return member 150 is brought into contact with the pad projection 21b of the brake pad 20. The pad projection 21b of the brake pad support member 21 is moved along the guide member 130 by actuation of a piston 40.

[0062] When a driver presses a brake pedal (not shown), hydraulic pressure is transmitted to the torque element 10. The hydraulic pressure causes the piston 40 to pressurize the brake pad 20 against the brake disc 30 (see Fig. 8). Once the brake pad 20 is brought into frictional contact with the brake disc 30, a braking force is generated. The return member 150 is elastically deformed by the pressure applied to the brake pad 20. Specifically, the return member 150 is elastically deformed by the pressure applied to the brake pad 20 such that the distance between the first and second return members 151 and 153 based on the return connecting member 152 is reduced.

[0063] Subsequently, if a driver does not depress the brake pedal during a brake release operation, no hydraulic pressure is transmitted to the piston 40, and the spring force of the return member 150 returns the brake pad 20 such that the brake pad 20 is sufficiently spaced from the brake disc 30. The return member 150 applies pressure to the brake disc 20 on the opposite side of the brake disc 30 and spaces the brake pad 20 away from the brake disc 30 to the left / right side (based on Fig. 9) of the brake disc 30. In particular, the distance between the first and second return members 151 and 153 increases, while the return member 150 is returned to its original state by the spring forces of the first and second members 151 and 153. At this time, the second return member 153 applies pressure to the same point of the brake pad 20.

[0064] In the brake pad guide 100 for the brake device according to the embodiment of the present disclosure, the return member 150 is formed in a V-shape. Therefore, when the brake pedal is released, the return member 150 can apply pressure to the same point of the brake pad 20 while being returned to the original state by spring force, so that a uniform return force can be generated for the brake pad 20. Therefore, uniform friction can be achieved between the brake pad 20 and the brake disc 30.

[0065] Although preferred embodiments of the disclosure have been disclosed for illustrative purposes, one skilled in the art will recognize that various modifications, additions, and substitutions are possible without departing from the scope and spirit of the disclosure as defined in the appended claims. Therefore, the true technical scope of the disclosure should be defined by the following claims.

Claims

[1] Brake pad guide (100) for a braking device, comprising: a body part (110) which is brought into contact with a torque element (10), a pair of insert parts (120) connected to the body part (110) such that a part of the torque element (10) is inserted into the insert parts (120); a pair of guide members (130) each connected to the pair of insert members (120) and configured to guide a brake pad; a pair of support members (140) each connected to the pair of guide members (130) and adapted to support the brake pad (20); and a pair of return parts (150) each connected to the pair of insert parts (120) located on facing sides of the insert parts (120) and arranged to provide a return force at the same point of the brake pad upon movement of the brake pad (20), wherein each of the return parts (150) comprises: a first return part (151) extending from each of the facing sides of the insert parts (120) so as to be inclined towards the corresponding support part (104); a reset connection part (152) connected to the first reset part (151); and a second return part (153) connected to the return connection part (152) and extending in the opposite direction of the first return part (151), wherein a play between the first and second return parts (151,153) increases as the location of the play is away from the return connection part (152), characterized by , that the return part (150) further comprises a contact projection (155) which is formed on the second return part (153) and is brought into point contact with the brake pad (20). [2] A brake pad guide for a brake device according to claim 1, wherein the second return part (153) elastically deforms and moves toward the first return part (151) when an external force is applied to the brake pad (20), the second return part (153) providing a return force to the brake pad (20) and applying pressure to the same point of the brake pad (20) when the external force is no longer applied to the brake pad (20). [3] A brake pad guide for a brake device according to claim 2, wherein the first and second return parts (151,153) form a V-shape. [4] A brake pad guide for a brake device according to claim 3, wherein the second return part (153) moves at the same height when it moves towards the first return part (151) and when it moves away from the first return part (151). [5] A brake pad guide for a brake device according to claim 1, wherein the return part (150) further comprises a rigidity reinforcing part (154) extending from the return connecting part (152) toward the second return part (153). [6] Brake pad guide for a braking device according to claim 1, wherein the body part (110) comprises: a body plate (111) brought into contact with the torque element (10); and a pair of body extension members (112) extending from the body plate (110) so as to be spaced apart from each other and respectively connected to the insert members (120). [7] A brake pad guide for a brake device according to claim 6, wherein the body part (110) further comprises a contact part (113) connected to the body plate (111) between the pair of body extension parts (112), extending to the opposite side of the insert part (120) and brought into close contact with the torque element (10). [8] A brake pad guide for a brake device according to claim 6, wherein each of the pair of insert parts (120) comprises: a first insertion plate (121) extending from one end of the body extension part (112) so as to be bent to one side; a second insert plate (122) extending from one end of the first insert plate (121) so as to be bent toward the guide member (130); and a third insert plate (123) extending from one end of the second insert plate (122) and bent in the opposite direction of the first insert plate (121) so as to face the first insert plate (121) and connected to the guide member (130), wherein the pair of return parts (150) are provided on facing sides of the pair of third insertion plates (123), respectively. [9] A brake pad guide for a brake device according to claim 8, wherein each of the pair of insertion pieces (120) includes a first insertion guide piece (124) connected to the third insertion plate (123) on the opposite side of the return piece (150) and extending from the third insertion plate (123) so as to be inclined toward the body piece (110) toward one end thereof. [10] A brake pad guide for a brake device according to claim 8, wherein each of the pair of guide members (130) comprises: a guide plate (131) extending from the third insertion plate (123) and connected to the support member (140); and a guide pressing part (132) extending from one side of the guide plate (131) to the opposite side of the first insert plate (121) and in close contact with the torque element (10). [11] A brake pad guide for a brake device according to claim 10, wherein each of the pair of guide members (130) further comprises a second insertion guide member (133) extending from the opposite side of each of the facing sides of the guide plates (131) so as to be inclined at a predetermined angle.

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