KR-20260064682-A - Brake slide clip with active contraction element

Abstract

The brake assembly slide clip includes a base section. A clamping portion extends from the base section. A lower section extends from the base section. A tangential section extends from a second side of the lower section. An active contraction element extends from the tangential section to provide a surface on which a brake pad is placed. The active contraction element is movable in a first axial direction in response to a brake pad force on the surface of the contraction element, and elastically returns to move the brake pad in a second axial direction opposite to the first axial direction when the force is removed. The tangential section is formed from a metal strip having a longitudinal axis that forms an angle between 15 and 75 degrees from the longitudinal side of the blank on which the remaining section of the clip is formed.

Inventors

• 골츠 디트리히
• 잘츠만 세바슈티안
• 페트리 랄프
• 바이어 슈테판 요제프
• 두리차 미할
• 체르나크 얀

Assignees

• 아우모비오 저머니 게엠베하

Dates

Publication Date

20260507

Application Date

20240724

Priority Date

20230725

Claims (19)

1. As a brake slide clip (102B, 102A, 102) for use in a disc brake assembly (100), A base section (200) having a first side and a second side opposite to the first side; A clamping portion (202) extending from the first side of the base section (200) - the clamping portion (202) comprises a base clamping section (206), an inner axial holding tab (208) extending from the first side of the base clamping section (206), and an outer axial holding tab (210) extending from the second side of the base clamping section (206) on the opposite side of the first side, and the clamping portion (202) is configured to be clamped to a portion of the anchor bracket (108) of the disc brake assembly (100) -; A lower section (216) extending from the second side of the base section (200) - the lower section (216) has a first side and a second side extending from the base section (200) -; A tangential joint section (220) extending from the second side of the lower section (216); and An active contraction element (230) extending from the above tangential joint section (220) - the active contraction element (230) comprises a flat link section (238) providing a first surface on which a brake pad (112, 110) of a disc brake is placed, a contact section (240) providing a second surface on which a brake pad (112, 110) is placed, a spring section (236) coupled to the flat link section (238), the active contraction element (230) placed at least partially over the lower section (216), and a connecting section (232) connected between the spring section (236) and the tangential joint section (220), wherein the distance between the lower part (232LP) of the connecting section (232) and the tangential joint section (220) is shorter than the distance between the upper part (232UP) of the connecting section (232) and the tangential joint section (220); When the active contraction element (230) is coupled to the brake pad (112, 110), the active contraction element (230) is movable from a contracted position relative to the base section (200) and the lower section (216) in response to the movement of the brake pad (112, 110) applying force to the second surface of the contact section (240), and elastically returns to the contracted position by a spring force acting on the flat link section (238) by the spring section (236) overcoming the force applied by the brake pad (112, 110), brake slide clip (102B, 102A, 102).
2. In paragraph 1, The lower section (216) is positioned vertically to the base section (200), the tangential joint section (220) is positioned vertically to the lower section (216), and the lower section (216) extends from the base section (200) through a first curved portion (218) positioned between the base section (200) and the lower section (216), a brake slide clip (102B, 102A, 102).
3. In paragraph 1, The flat link section (238) comprises a first longitudinal end portion connected to the contact section (240) and a second longitudinal end portion connected to the spring section (236), and while the brake slide clip (102B, 102A, 102) is placed in the disc brake assembly (100) and before engaging with the brake pad (112) (110), the flat link section (238) is positioned such that the first longitudinal end portion of the flat link section (238) is closer to the clamping portion (202) than the second longitudinal end portion is positioned at the clamping portion (202), thereby receiving and engaging the brake pad (112, 110) in the flat link section (238) while the brake slide clip (102B, 102A, 102) is inserted into the disc brake assembly.
4. In paragraph 1, A brake slide clip (102B, 102A, 102) that applies a first lifting force in a reflective direction when the active contraction element (230) is coupled to the brake pad (112, 110) in the disc brake assembly (100).
5. In paragraph 4, Further comprising an extension section (224) extending from the tangential joint section (220) through a curved portion (226), wherein the brake pad (112, 110) is disposed at the distal end portion of the extension section (224), and the extension section (224) applies a second radially lifting force to the brake pad (112, 110) when the brake slide clip (102B, 102A, 102) engages within the disc brake assembly (100).
6. In paragraph 1, Further comprising an extension section (224) extending from a tangential joint section (220) through a curved portion (226), wherein the brake pad (112, 110) is positioned at the distal end portion of the extension section (224), and the curved portion (226) and the extension section (224) include a cutout (280) defined therein, wherein the cutout (280) is centered laterally along the brake slide clip (102B, 102A, 102).
7. In paragraph 1, The brake slide clip (102B, 102A, 102) is formed from a blank material (60) having a main metal part corresponding to the base section (200), the clamping part (202), the lower section (216), and the tangential joining section (220), and a metal strip corresponding to the active shrinkage element (230), wherein the longitudinal axis of the metal strip is positioned at an angle of 15 to 75 degrees with respect to the longitudinal side of the main metal part.
8. In Paragraph 7, A brake slide clip (102B, 102A, 102), wherein the angle between the longitudinal axis of the metal strip and the longitudinal side of the main metal part is between 15 and 25 degrees.
9. In paragraph 1, The spring section (236) of the active contraction element (230) comprises at least one cutout (248), and the spring section (236) undergoes elasto-plastic deformation when the active contraction element (230) moves axially from the contracted position during braking operation, brake slide clip (102B, 102A, 102).
10. In paragraph 1, The above spring section (236) includes a plurality of curved portions, and the curved portions align the sections of the active contraction element (230) axially with each other, brake slide clips (102B, 102A, 102).
11. In paragraph 1, A brake slide clip (102B, 102A, 102), wherein most of the above connecting section (232) is in a plane positioned at a non-zero angle with respect to the plane formed by the radial axis and tangential axis of the brake slide clip (102B, 102A, 102).
12. A method for forming brake slide clips (102B, 102A, 102) for a disc brake assembly (100), A step of obtaining a material blank (60) having a main metal portion (62) and a metal strip (64) extending at an angle between 15 and 75 degrees from the longitudinal side of the main metal portion (62); A step of defining a base section (200), a lower section (216), a tangential joint section (220), and a lower clamping section (213) from a first region of the main metal part (62), by bending the lower section (216) with respect to the base section (200), bending the tangential joint section (220) with respect to the lower section (216), and bending the lower clamping section (213) with respect to the base section (200) - wherein the lower section (216) extends from the base section (200) through a first curved portion (218), the tangential joint section (220) extends from the lower section (216) through a second curved portion (222), and the lower clamping section (213) extends from the base section (200) through a third curved portion (204) - ; A step of defining a base clamping section (206), an upper clamping section (211), an inner axial holding tab (208), and an outer axial holding tab (210) from a second region of the main metal part by bending the opposing lateral end portions of the second region to form the inner and outer axial holding tabs, bending the base clamping section (206) with respect to the lower clamping section (213), and bending the upper clamping section (206) with respect to the base clamping section (211); and A method comprising the step of defining the active contraction element (230) by bending the metal strip with respect to the tangential joint section (220) in a plurality of bending operations so that the portions of the active contraction element (230) are aligned with each other in the axial direction.
13. In Paragraph 12, A method in which each of the plurality of bending operations of the metal strip bends the metal strip in a single direction.
14. In Paragraph 12, A method in which the metal strip extends at an angle between 15 and 25 degrees from the longitudinal side of the main metal part.
15. In Paragraph 12, The metal strip comprises a material portion for a connecting section (232) of the active contraction element (230) that extends directly from the tangential joining section (220), and the step of forming the active contraction element (230) comprises bending the material portion for the connecting section (232) of the active contraction element (230) so that the lower portion (232LP) of the connecting section (232) in the brake slide clip (102B, 102A, 102) is closer to the tangential joining section (220) than the upper portion (232UP) of the connecting section (232).
16. In Paragraph 12, The metal strip comprises a material portion for a connecting section (232) of the active contraction element (230) that extends directly from the tangential joining section (220), and the step of forming the active contraction element (230) comprises bending the material portion for the connecting section (232) of the active contraction element (230) so that most of the connecting section (232) is positioned at a non-zero angle with respect to a plane extending in a tangential direction formed by the radial axis and tangential axis of the brake slide clip (102B, 102A, 102).
17. In Paragraph 12, The metal strip comprises at least one cutout (248), and the spring section (236) undergoes elastoplastic deformation when the active contraction element (230) moves axially during braking action when the brake spring clip engages with the brake pad (112, 110) of the disc brake assembly (100).
18. In Paragraph 12, A method in which, prior to performing the bending operation, the metal strip is positioned along the longitudinal side of the main metal part and has a first longitudinal end extending from the longitudinal side of the main metal part and a second longitudinal end not extending further than the longitudinal end of the main metal part.
19. In Paragraph 12, The above active contraction element (230) comprises a flat link section (238) configured to contact a brake pad, the flat link section (238) comprises a first longitudinal end portion and a second longitudinal end portion, and while the brake slide clip (102B, 102A, 102) is placed in the disc brake assembly (100) and before engaging with the brake pad (112) (110), the flat link section (238) is positioned such that the first longitudinal end portion of the flat link section (238) is closer to the clamping portion (202) than the second longitudinal end portion is positioned at the clamping portion (202), so that the brake pad (112, 110) is received and engaged in the flat link section (238) while being inserted into the disc brake assembly.

Description

Brake slide clip with active contraction element The present specification relates to a brake slide clip used in a disc brake assembly. Disc brake systems have been widely used in the automotive industry. During braking, friction between the disc brake pads and the brake rotor generates a significant amount of heat, as the braking system converts kinetic energy into heat to decelerate or stop a moving vehicle. A typical disc brake system consists of several basic components. One of them is the caliper, which surrounds at least part of the brake rotor. The caliper is equipped with brake pads designed to press the rotor, causing the disc brake to use the braking system to decelerate the vehicle. Conventional disc brakes can experience undesirable drag from disengaged pads on the rotor. Drag can cause power loss, shortened pad life, and potential overheating of brake components and wheel bearings. Braking drag increases CO2 emissions in gasoline-powered vehicles and reduces the vehicle range of electric vehicles. Drag is caused by brake pads that continue or intermittently push against the disc even after the applied pressure is released. Therefore, a method is needed to prevent unnecessary brake drag between the brake pads and the rotor. FIG. 1 illustrates an exploded perspective view of a disc brake assembly according to an exemplary embodiment. FIG. 2 illustrates a perspective view of an assembled anchor element of the disc brake assembly of FIG. 1. FIGS. 3 to 5 illustrate perspective views of a brake slide clip of a disc brake assembly according to one or more exemplary embodiments. FIGS. 6a through 6c illustrate front views of a brake slide clip of a disc brake assembly according to a plurality of exemplary embodiments. FIG. 7 illustrates a partial perspective view of the brake slide clip, brake pad, and anchor element of the disc brake assembly of FIG. 1. FIGS. 8 to 10 illustrate plan views of material blanks in which the brake slide clips of FIGS. 6a to 6c are each formed according to a plurality of exemplary embodiments. Figure 11 graphically illustrates the brake slide clip contraction force during the brake pad life. These and other embodiments, aspects, advantages, and features of the present invention will be presented in part in the following description, which will become apparent to those skilled in the art by referring to the following description of the invention and the reference drawings, or by practicing the invention. The aspects, advantages, and features of the present invention are realized and achieved by the mechanisms, procedures, and combinations specifically set forth in the appended claims and their equivalents. The following detailed description refers to the attached drawings, which constitute part of the detailed description. The drawings illustrate specific embodiments in which the device is realized. Such embodiments referred to herein as “Yes” or “Option” are described in sufficient detail to enable those skilled in the art to practice the embodiments of the invention. Embodiments may be combined with one another, other embodiments may be utilized, and structural or logical changes may be made without departing from the scope of the invention. Accordingly, the following detailed description should not be interpreted in a limiting sense, and the scope of the invention is defined by the appended claims and their legal equivalents. Generally, a brake slide clip for a disc brake assembly includes an active retraction element integrated therein to retract the brake pad in the direction opposite to the brake rotor to create clearance for the brake rotor. The active retraction element is designed to deform elastoplastically in response to wear of the brake pad and brake rotor, providing a nearly constant retraction force as wear increases. FIG. 1 illustrates a disc brake assembly (100) according to an exemplary embodiment. The general structure and operation of the disc brake assembly (100) are common in the art. The disc brake assembly (100) includes a caliper (106), an anchor bracket (108), and outer and inner brake pads (110 and 112), respectively. The disc brake assembly (100) is exemplified for mounting on a fixed component of a motor vehicle. The caliper (106) includes an inner section (114) and an outer section (116) connected by an intermediate section (118). The caliper (106) is supported on the anchor bracket (108) by first and second guide pins (120A and 120B) extending to the anchor bracket (108). The caliper (106) is configured to be secured to the first and second guide pins (120A and 120B), respectively, by first and second guide pin bolts (122A and 122B). The anchor bracket (108) is configured to be secured to a fixed component of the motor vehicle. The anchor bracket (108) includes first and second openings (124A and 124B) spaced apart from each other and first and second openings (126A and 126B) spaced apart from each other. The first and second openings (124A and