Friction plate clearance compensation mechanism of brake caliper

Abstract

The utility model discloses a friction plate clearance compensation mechanism of a brake caliper, which comprises a caliper support, the caliper support is provided with an accommodating cavity crossing two sides of a brake disc, symmetrical friction plates are respectively arranged on the front side and the rear side of the accommodating cavity, and each friction plate comprises a back plate and a friction pad fixed on the back plate. Guide walls are respectively arranged on the left side and the right side of the friction plate of the accommodating cavity, and are used for guiding the back plate to move back and forth; a gap is formed between the guide wall and the back plate, mounting grooves are formed in the left side wall and the right side wall of the back plate respectively, a first spring and a first steel ball are arranged in each mounting groove, one end of each first spring abuts against the bottom of the corresponding mounting groove, the other end of each first spring abuts against the corresponding first steel ball, and one side of each first steel ball extends out of the corresponding mounting groove and is in rolling fit with the corresponding guide wall; according to the utility model, the brake locking failure can be prevented through the reserved enough clearance, and meanwhile, the generation of sharp noise can be reduced through the clearance dynamic compensation of the mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vehicle brake caliper, specifically relates to a brake caliper friction plate gap compensation mechanism. BACKGROUND

[0002] In the vehicle braking system, the brake caliper is used to generate braking force by clamping the brake disc when braking. However, the high-temperature environment generated during braking poses a severe challenge to the performance of the brake caliper, especially the thermal expansion problem of the friction plate steel back. Since the friction plate steel back is usually made of metal material, it will expand thermally at high temperature, causing the steel back to elongate and possibly get stuck in the open slot of the caliper, thereby causing serious consequences of brake failure.

[0003] To solve this technical problem, the gap between the friction plate steel back and the open slot of the caliper needs to be increased to reserve space for thermal expansion. However, this approach, while solving the problem of thermal expansion, also introduces new problems. Under non-high-temperature road conditions, the excessive gap will result in insufficient clamping force on both sides of the friction plate, causing the friction plate to knock and wear the brake disc in the non-braking state, thereby causing uneven wear on the surface of the friction plate and problems such as eccentric wear and driving noise.

[0004] To improve the above-mentioned deficiencies, the prior art such as the patent scheme with publication number CN222046454U sets an installation groove on the side wall of the friction plate steel back and installs an outwardly extending spring in the groove, using the elasticity of the spring to supplement the gap between the caliper open slot.

[0005] Although the structure design of the prior art achieves a certain degree of gap compensation effect, the sliding contact between the spring and the guide wall introduces new problems. That is, in long-term use, the spring and the guide wall inevitably rub and scratch, and under the action of the spring's elastic extrusion force, this rubbing and scratching will be amplified, causing the friction plate to displace poorly, the guide wall to wear, and sharp noise to occur. UTILITY MODEL CONTENTS

[0006] The utility model aims at the problems existing in the prior art and provides a brake caliper friction plate gap compensation mechanism that can prevent brake lock failure through a sufficient gap, and the dynamic compensation of the gap of the mechanism can also reduce the generation of sharp noise.

[0007] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0008] A brake caliper friction pad clearance compensation mechanism includes a caliper bracket with a receiving cavity spanning both sides of a brake disc. Symmetrical friction pads are provided on the front and rear sides of each receiving cavity. Each friction pad includes a back plate and a friction pad fixed to the back plate. Guide walls are provided on the left and right sides of each friction pad in the receiving cavity, guiding the back plate's forward and backward displacement. A gap exists between the guide walls and the back plate. Mounting grooves are provided on the left and right side walls of the back plate. Each mounting groove contains a first spring and a first steel ball. One end of the first spring abuts against the bottom of the mounting groove, and the other end abuts against the first steel ball. One side of the first steel ball extends out of the mounting groove and rolls in cooperation with the guide wall.

[0009] Furthermore, a metal sheet is provided between the guide wall and the side wall of the back plate, the first steel ball contacts and engages with the metal sheet, the metal sheet covers the guide wall and is snapped and fixed to the guide wall.

[0010] Furthermore, the metal sheet spans the accommodating cavity and covers the guide walls on both the front and rear sides of the accommodating cavity, forming an integral structure.

[0011] Furthermore, the bottom of the metal sheet is provided with a bent portion, which supports the lower corner of the back plate, and the bent portion slides in conjunction with the back plate.

[0012] Furthermore, the left and right side walls of the back plate are provided with a number of mounting grooves, and each mounting groove is provided with a second spring and a second steel ball. One end of the second spring abuts against the bottom of the mounting groove, and the other end abuts against the second steel ball. One side of the second steel ball extends out of the mounting groove and rolls with the guide wall.

[0013] Furthermore, a pad is provided between the second spring and the second steel ball. One end face of the pad is provided with an arc surface for contacting the second steel ball, and the other end face of the pad is provided with a pin for inserting into the end of the second spring.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By setting mounting grooves on both sides of the back plate of the friction plate and arranging springs and steel balls therein, dynamic compensation of the gap is realized, so that the friction plate can maintain an appropriate gap with the guide wall at different temperatures, which not only prevents the phenomenon of thermal expansion and jamming at high temperatures, but also avoids shaking and uneven wear caused by excessive gap at low temperatures.

[0016] 2. The steel ball design transforms sliding friction into rolling friction, reducing the friction between the friction plate and the guide wall, making the displacement of the friction plate smoother, while preventing wear on the guide wall and greatly reducing the generation of sharp noise.

[0017] 3. By setting a metal sheet between the guide wall and the back plate, and having it in contact with the steel ball, a wear-resistant protective layer is formed, which extends the service life of the guide wall and reduces maintenance costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the brake caliper in one embodiment of this application;

[0020] Figure 2 This is a bottom view of the brake caliper structure in one embodiment of this application;

[0021] Figure 3 This is a cross-sectional view (AA) of the brake caliper in one embodiment of this application;

[0022] Figure 4 For this application Figure 3 A magnified view of a section at point A in the middle;

[0023] Figure 5 This is a schematic diagram of the disassembled structure of the friction plate and the metal plate in one embodiment of this application;

[0024] Figure 6 This is a cross-sectional view (AA) of the brake caliper in one embodiment of this application;

[0025] Figure 7 For this application Figure 6 A magnified view of a section at point B in the middle;

[0026] In the diagram: 1. Caliper bracket; 2. Friction plate; 2a. Backing plate; 2b. Friction pad; 3. Mounting groove; 4. First spring; 5. First steel ball; 6. Metal sheet; 6a. Bending part; 7. Guide wall; 8. Second spring; 9. Second steel ball; 10. Pad block. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Existing technologies, such as the patent scheme with publication number CN222046454U, involve setting an installation groove on the side wall of the friction plate steel back and installing an outwardly protruding spring in the groove, using the elasticity of the spring to fill the gap between it and the caliper crotch.

[0032] While existing structural designs have achieved gap-filling effects to some extent, the sliding contact between the spring and the guide wall introduces new problems. Specifically, friction and scraping between the spring and the guide wall are unavoidable during long-term use. Under the elastic compressive force of the spring, this friction and scraping are amplified, leading to poor displacement of the friction plate, wear on the guide wall, and the generation of sharp noise.

[0033] To address the above technical issues, such as Figures 1 to 5As shown, this application embodiment provides a brake caliper friction pad clearance compensation mechanism, including a caliper bracket 1. The caliper bracket 1 has a receiving cavity spanning both sides of the brake disc. Symmetrical friction pads 2 are provided on the front and rear sides of the receiving cavity. The friction pad 2 includes a back plate 2a and a friction pad 2b fixed to the back plate 2a. The receiving cavity has guide walls 7 on the left and right sides of the friction pad 2. The guide walls 7 are used to guide the back plate 2a to move back and forth. There is a gap between the guide walls 7 and the back plate 2a. The left and right side walls of the back plate 2a are provided with mounting grooves 3. Each mounting groove 3 is provided with a first spring 4 and a first steel ball 5. One end of the first spring 4 abuts against the bottom of the mounting groove 3, and the other end abuts against the first steel ball 5. One side of the first steel ball 5 extends out of the mounting groove 3 and rolls with the guide wall 7.

[0034] The friction pad gap compensation mechanism of the brake caliper in this embodiment achieves dynamic gap compensation by setting mounting grooves 3 on both sides of the back plate 2a of the friction pad 2, and arranging a first spring 4 and a first steel ball 5 in the mounting grooves 3. In the non-braking state, the first spring 4 remains compressed, pushing the first steel ball 5 partially out of the mounting groove 3 to form a rolling engagement with the guide wall 7, thereby effectively filling the gap between the back plate 2a and the guide wall 7, while ensuring that the friction pad 2 is stably clamped, reducing wobbling caused by excessive gap. When the braking drive device is activated, the piston pushes the friction pad 2 to move linearly along the guide wall 7, and the first steel ball 5 adaptively adjusts its position under the action of the first spring 4, maintaining rolling contact with the guide wall 7 until the friction pad 2 clamps the brake disc to complete braking.

[0035] The combination of the first spring 4 and the first steel ball 5 can automatically adapt to the gap changes at different temperatures, ensuring that the friction plate 2 will not get stuck due to thermal expansion at high temperatures, and ensuring the stable clamping of the friction plate 2 at low temperatures, avoiding uneven wear and driving noise, and improving the stability and durability of the braking system.

[0036] By converting the sliding friction in the existing technology into rolling friction, the friction between the friction plate 2 and the guide wall 7 is reduced. This not only reduces the dragging phenomenon of the friction plate 2, making the displacement of the friction plate 2 smoother, but also prevents the wear of the guide wall 7 and greatly reduces the generation of sharp noise.

[0037] In some embodiments, a metal sheet 6 is provided between the guide wall 7 and the side wall of the back plate 2a. The first steel ball 5 contacts and engages with the metal sheet 6. The metal sheet 6 covers the guide wall and is snapped and fixed to the guide wall 7.

[0038] Metal sheet 6 covers the surface of guide wall 7, forming a wear-resistant protective layer. The first steel ball 5 contacts and rolls in conjunction with metal sheet 6, preventing wear on guide wall 7 caused by long-term rolling friction and extending its service life. At the same time, the replacement and maintenance of metal sheet 6 are relatively simple, reducing maintenance costs.

[0039] In some embodiments, the metal sheet 6 spans the receiving cavity and covers the guide walls 7 on both the front and rear sides of the receiving cavity, forming an integral structure. The integral structure design of the metal sheet 6 makes installation and replacement easier, reducing maintenance costs and time.

[0040] In some embodiments, the bottom of the metal sheet 6 is provided with a bent portion 6a, which supports the lower corner of the back plate 2a, and the bent portion 6a slides in cooperation with the back plate 2a.

[0041] The bent portion 6a supports the lower corner of the back plate 2a and forms a sliding fit with the back plate 2a. When the friction plate 2 moves, the lower corner of the back plate 2a slides along the bent portion 6a, thereby ensuring the stable displacement of the friction plate 2 within the accommodating cavity.

[0042] like Figure 6 As shown, in some embodiments, the left and right sidewalls of the back plate 2a are respectively provided with a plurality of mounting grooves 3. Each mounting groove 3 is provided with a second spring 8 and a second steel ball 9. One end of the second spring 8 abuts against the bottom of the mounting groove 3, and the other end abuts against the second steel ball 9. One side of the second steel ball 9 extends out of the mounting groove 3 and rolls in cooperation with the guide wall 7. When the friction plate 2 moves along the guide wall 7 during braking, the multiple second steel balls 9 simultaneously roll in contact with the guide wall 7, ensuring the smooth and stable displacement of the friction plate 2.

[0043] like Figure 7 As shown, in some embodiments, a pad 10 is provided between the second spring 8 and the second steel ball 9. One end face of the pad 10 is provided with an arc surface for abutting against the second steel ball 9, and the other end face of the pad 10 is provided with a pin for inserting into the end of the second spring 8.

[0044] The pad 10 contacts the second steel ball 9 through the arc surface, ensuring that the second steel ball 9 can roll smoothly, avoiding direct contact between the second spring 8 and the second steel ball 9, preventing the second steel ball 9 from getting stuck due to uneven force, ensuring that the second steel ball 9 always keeps rolling, thereby avoiding sliding friction between it and the guide wall 7.

[0045] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A brake caliper friction pad clearance compensation mechanism, comprising a caliper bracket (1), the caliper bracket (1) having a receiving cavity spanning both sides of the brake disc, the receiving cavity having symmetrical friction pads (2) on its front and rear sides respectively, the friction pads (2) comprising a back plate (2a) and a friction pad (2b) fixed to the back plate (2a), the receiving cavity having guide walls (7) on its left and right sides respectively, the guide walls (7) being used to guide the back plate (2a) to move forward and backward; Its features are, There is a gap between the guide wall (7) and the back plate (2a). The left and right side walls of the back plate (2a) are respectively provided with mounting grooves (3). Each mounting groove (3) is provided with a first spring (4) and a first steel ball (5). One end of the first spring (4) abuts against the bottom of the mounting groove (3), and the other end abuts against the first steel ball (5). One side of the first steel ball (5) extends out of the mounting groove (3) and rolls with the guide wall (7).

2. The friction pad clearance compensation mechanism for a brake caliper according to claim 1, characterized in that, A metal sheet (6) is also provided between the guide wall (7) and the side wall of the back plate (2a). The first steel ball (5) contacts and cooperates with the metal sheet (6). The metal sheet (6) covers the guide wall and is snapped and fixed to the guide wall (7).

3. The friction pad clearance compensation mechanism for a brake caliper according to claim 2, characterized in that, The metal sheet (6) spans the accommodating cavity and covers the guide walls (7) on both the front and rear sides of the accommodating cavity, forming an integral structure.

4. The friction pad clearance compensation mechanism for a brake caliper according to claim 2, characterized in that, The bottom of the metal sheet (6) is provided with a bent part (6a), which supports the lower corner of the back plate (2a) and the bent part (6a) slides in cooperation with the back plate (2a).

5. The friction pad clearance compensation mechanism for a brake caliper according to claim 1, characterized in that, The back plate (2a) has several mounting grooves (3) on its left and right side walls respectively. Each mounting groove (3) is provided with a second spring (8) and a second steel ball (9). One end of the second spring (8) abuts against the bottom of the mounting groove (3) and the other end abuts against the second steel ball (9). One side of the second steel ball (9) extends out of the mounting groove (3) and rolls with the guide wall (7).

6. The friction pad clearance compensation mechanism for a brake caliper according to claim 5, characterized in that, A pad (10) is provided between the second spring (8) and the second steel ball (9). One end face of the pad (10) is provided with an arc surface for contacting the second steel ball (9). The other end face of the pad (10) is provided with a pin for inserting into the end of the second spring (8).

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