Brake caliper guide structure and brake caliper
By changing the guide sliding position and sealing structure, the NVH performance problem of electromechanical calipers was solved, achieving smooth sliding, stability, and reduced cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LEEKR (ZHEJIANG) TECHNOLOGY CO LTD
- Filing Date
- 2025-09-11
- Publication Date
- 2026-06-19
AI Technical Summary
Existing electromechanical calipers have poor NVH performance, leading to problems such as poor sliding, jamming, vibration, and abnormal noise.
By changing the guide sliding position, the center of gravity of the brake caliper is made to fall completely into the guide sliding area, and the two ends of the caliper bracket are sealed by the first seal and the second seal respectively, ensuring the smooth sliding and stability of the caliper housing, simplifying the structure and reducing costs.
It improves the NVH performance of brake calipers, reduces friction pad wear, enhances sliding stability and reliability, simplifies the assembly process, and reduces costs.
Smart Images
Figure CN224380449U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electromechanical caliper technology, and in particular to brake caliper guide structures and brake calipers. Background Technology
[0002] With the popularization of new energy vehicles and advanced driver assistance systems, brake-by-wire (EBS) is being widely used, and wheel-end brakes are also evolving from traditional hydraulic calipers to electromechanical calipers.
[0003] Electromechanical calipers (also known as electromechanical braking systems, EMB) mainly consist of caliper housings, transmission mechanisms, motors, and ECUs. When the driver presses the brake pedal, the domain controller detects the displacement sensor signal of the brake pedal and sends a target clamping force or target current to the electromechanical caliper. The motor then drives the transmission mechanism to ultimately clamp the inner and outer friction pads to achieve the braking purpose.
[0004] During braking and brake release, the caliper housing and caliper bracket are connected by guide pins, which ensure precise relative sliding between them to guarantee the clamping and release of the outer friction pads. Therefore, the guide structure of the caliper housing is one of the core design elements of the brake system; its performance directly affects the lifespan of the friction pads, vibrations, and overall vehicle energy consumption. However, current guide structures can lead to poor caliper sliding, resulting in problems such as jamming, vibration, and abnormal noises, i.e., poor NVH performance. Utility Model Content
[0005] The purpose of this application is to address the problem of poor NVH performance in existing electromechanical calipers. Therefore, this application provides a brake caliper guide structure and a brake caliper. By changing the guide sliding position, the center of gravity of the brake caliper is made to fall completely into the guide sliding area. Furthermore, by reliably sealing the guide hole of the caliper housing, the smoothness of the caliper housing sliding is improved, thereby enhancing the NVH performance of the brake caliper.
[0006] This application provides a brake caliper guide structure for connecting a caliper bracket and a caliper housing, including:
[0007] A guide pin, one end of which is used to be fixedly connected to the caliper bracket, and the size of the guide pin is adapted to the guide hole of the caliper housing so that the caliper housing can be sleeved with the guide pin through the guide hole and can slide along the guide pin;
[0008] A first seal is disposed at one end of the guide pin and located between the caliper bracket and the caliper housing. One end of the first seal is connected to the caliper housing and is movable with the caliper housing to maintain a sealed connection with the first end of the guide hole in the caliper housing; and,
[0009] The second seal is a cover that covers the end of the guide pin away from the first seal. The circumferential edge of the second seal is used to connect with the guide hole of the caliper housing. The second seal can slide synchronously with the caliper housing to maintain a sealed connection between the second end of the caliper housing and the guide hole of the caliper housing opposite to its first end.
[0010] By adopting the above technical solution, the guide sliding position is changed from the connection between the caliper bracket and the guide pin (i.e., the guide pin hole of the original caliper bracket) to the connection between the guide pin and the caliper housing (i.e., the guide hole of the caliper housing). This ensures that the center of gravity of the brake caliper falls completely within the guide sliding area (i.e., the guide hole of the caliper housing), making the caliper housing slide more smoothly and return to its original position more timely. This reduces caliper drag, improves friction pad wear, and enhances NVH performance. Furthermore, by sealing both ends of the caliper bracket with the first and second seals respectively, external dust and other contaminants are prevented from entering the guide hole of the caliper housing, further ensuring the sliding stability and reliability of the caliper housing and further improving NVH performance. At the same time, the second seal is a cover that covers the corresponding end of the guide pin. That is, there is no need to set a sealing connection structure between the second seal and the guide pin, which simplifies the overall structure, reduces costs, facilitates assembly, and improves the reliability of the end seal.
[0011] In some embodiments, the first seal includes a telescopic portion and a support portion located at one end of the telescopic portion; the telescopic portion can extend and retract with the sliding of the caliper housing; the support portion has a first smooth surface and is used to insert between the guide pin and the caliper housing, such that the first smooth surface contacts the guide pin, and the surface opposite to the first smooth surface is sealed to the caliper housing, such that the support portion can slide synchronously with the caliper housing along the guide pin.
[0012] By adopting the above technical solution, the first seal ensures a constant sealed connection with the slidable caliper housing through its telescopic extension and retraction, and avoids interference with the sliding of the caliper housing. At the same time, the first seal is inserted between the guide pin and the caliper housing through its support portion, and the first smooth surface of the support portion contacts the guide pin, while the opposite surface is sealed to the caliper housing. That is, the caliper housing slides on the guide pin through the support portion, reducing the friction between it and the guide pin, further improving the smoothness of the caliper housing sliding, optimizing the vibration and noise caused by bumps, and resulting in better NVH performance.
[0013] In some embodiments, the first seal further includes a fixing portion located at the other end of the telescopic portion, the fixing portion being disposed near the caliper bracket and sealingly connected to the guide pin.
[0014] In some embodiments, the second seal has a top surface and a circumferential surface adjacent to the top surface in the circumferential direction, wherein the top surface is spaced from the end face of the corresponding end of the guide pin to avoid collision with the guide pin during sliding.
[0015] In some embodiments, the second seal is provided with a reinforcing rib on its inner circumferential direction, the reinforcing rib extending axially along the guide pin, and one end of the reinforcing rib being used to abut against the end face of the caliper housing.
[0016] This application embodiment also provides a brake caliper, including a caliper bracket, a caliper housing, and any of the above-described brake caliper guide structures. The caliper housing is provided with a through guide hole and is sleeved with a guide pin of the brake caliper guide structure through the guide hole, and can slide along the guide pin.
[0017] By adopting the above technical solution, the sliding position is changed from the connection between the caliper bracket and the guide pin (i.e., the guide pin hole of the original caliper bracket) to the connection between the guide pin and the caliper housing (i.e., the guide hole of the caliper housing). This ensures that the center of gravity of the brake caliper falls completely within the sliding area (i.e., the guide hole of the caliper housing), making the caliper housing slide more smoothly and return to its original position more timely. This reduces caliper drag, improves friction pad wear, and enhances NVH performance. Furthermore, by sealing both ends of the caliper bracket with the first and second seals of the brake caliper guide structure, external dust and other contaminants are prevented from entering the guide hole of the caliper housing, further ensuring the sliding stability and reliability of the caliper housing and further improving NVH performance. At the same time, the second seal is a cover that covers the corresponding end of the guide pin. This means that there is no need to set a sealing connection structure between the second seal and the guide pin, simplifying the overall structure, reducing costs, facilitating assembly, and improving the reliability of the end seal.
[0018] In some embodiments, the caliper bracket is provided with a threaded hole, and the guide pin is provided with an external thread adapted to the threaded hole and is threadedly connected to the caliper bracket.
[0019] In some embodiments, a matching stepped structure is provided between the threaded hole end of the caliper bracket and the guide pin, so that the two are positioned and supported by the stepped structure when they are threaded together.
[0020] In some embodiments, a mounting groove is provided on the inner side of the guide hole of the caliper housing near the caliper bracket, and the first sealing part of the brake caliper guide structure is embedded in the mounting groove and sealed to the caliper housing.
[0021] Other features and corresponding beneficial effects of this application will be described in the latter part of the specification, and it should be understood that at least some of the beneficial effects will become obvious from the description in this application. Attached Figure Description
[0022] Figure 1(a) is a schematic diagram of the existing brake caliper guide structure (kingpin);
[0023] Figure 1(b) is a schematic diagram of the existing brake caliper guide structure (sub-pin);
[0024] Figure 2 This is a schematic diagram of the brake caliper guide structure of this application;
[0025] Figure 3 This is an exploded structural diagram of the brake caliper of this application;
[0026] Figure 4 This is a cross-sectional view of the brake caliper and brake disc assembled according to this application.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1. Caliper bracket; 11. Threaded structure; 12. Positioning surface; 13. Supporting surface; 15. Brake disc; 16. Piston; 17. Outer friction plate; 18. Inner friction plate;
[0029] 2. Caliper housing; 20. Guide pin bolt; 21. Guide hole; 22. Rubber bushing;
[0030] 3. Guide pin; 30. ECU controller; 31. Transmission mechanism; 32. Motor;
[0031] 4. First sealing element; 41. Fixing part; 42. Telescopic part; 43. Supporting part; 44. First sealing structure;
[0032] 5. Second sealing element; 51. Second sealing structure; 52. Reinforcing rib. Detailed Implementation
[0033] The following specific embodiments illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Although the description of this application is presented in conjunction with preferred embodiments, this does not mean that the features of this application are limited to this embodiment. On the contrary, the purpose of describing the application in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of this application. To provide a thorough understanding of this application, many specific details will be included in the following description. This application may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this application, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.
[0034] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more. Unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0036] Example 1:
[0037] It should be noted that NVH (Noise, Vibration, Harshness) refers to noise, vibration, and comfort. NVH performance refers to low noise, low vibration, and high comfort.
[0038] Please refer to Figures 1(a) and 1(b). Figure 1(a) is a schematic diagram of the existing brake caliper guide structure (master pin); Figure 1(b) is a schematic diagram of the existing brake caliper guide structure (secondary pin). The two structures are basically the same.
[0039] Existing brake caliper guiding structures typically involve a guide pin 3 and a caliper housing 2 fixed together by a guide pin bolt 20. The guide pin 3 slides within the guide pin hole of the caliper bracket 1 to achieve vehicle braking. However, in this guiding structure, the guide pin hole is located on the caliper bracket 1 and cannot change with the movement of the caliper housing 2 due to the wear of the inner and outer friction pads and the brake disc. It is difficult to ensure that the center of gravity of the brake caliper is completely located within the guide pin hole area. In other words, the center of gravity may move outside the guide sliding area as the caliper slides, leading to problems such as poor sliding of the guide pin 3, jamming, vibration, and abnormal noise, resulting in poor NVH performance of the brake caliper.
[0040] Therefore, please see Figure 2 , Figure 2 This is a schematic diagram of the brake caliper guide structure of this application.
[0041] This application provides a brake caliper guide structure for connecting a caliper bracket 1 and a caliper housing 2. The brake caliper guide structure includes a guide pin 3 and a first seal 4 and a second seal 5 disposed at both ends of the guide pin 3.
[0042] One end of the guide pin 3 is used to be fixedly connected to the caliper bracket 1, that is, the guide pin 3 and the caliper bracket 1 change from a sliding connection to a fixed connection.
[0043] The size of the guide pin 3 is adapted to the guide hole 21 of the caliper housing 2 so that the caliper housing 2 can be sleeved with the guide pin 3 through the guide hole 21 and can slide along the guide pin 3, that is, the caliper housing 2 and the guide pin 3 change from a fixed connection to a sliding connection.
[0044] This brake caliper guide structure changes the connection method of the caliper bracket 1, guide pin 3 and caliper housing 2. Specifically, the guide sliding position is changed from the connection between the caliper bracket 1 and the guide pin 3 (i.e. the guide pin hole of the caliper bracket 1 in the existing guide mechanism) to the connection between the guide pin 3 and the caliper housing 2 (i.e. the guide hole 21 of the caliper housing 2). When the brake caliper is clamped and released, the caliper housing 2 slides back and forth on the guide pin 3 to achieve vehicle braking and normal driving.
[0045] It should be noted that the brake caliper housing 2 has two symmetrically arranged guide holes 21, and correspondingly two symmetrically arranged guide structures. The center of gravity of the brake caliper is located on the axis of symmetry of the two symmetrically arranged guide pins 3, and the position of the center of gravity moves in the same direction as the caliper housing 2 slides. In the existing brake caliper guide structure, the sliding of the guide pins 3 will cause the center of gravity to move away from the sliding connection area between the guide pins 3 and the caliper bracket 1, or even fall outside this area, thus leading to problems such as poor sliding, jamming, vibration and abnormal noise.
[0046] This method uses guide pin 3 for fixing and caliper housing 2 for sliding, ensuring that the center of gravity of the brake caliper falls completely into the guide sliding area (i.e., guide hole 21 of caliper housing 2), making the caliper housing 2 slide more smoothly and return to its original position more timely, thereby reducing caliper drag, improving friction pad wear, and enhancing NVH performance.
[0047] Furthermore, the first seal 4 is used to seal one end of the guide hole 21 of the caliper housing 2, and the second seal 5 is used to seal the other end of the guide hole 21 of the caliper housing 2, thereby preventing external dust and other objects from entering the guide hole 21 of the caliper housing 2, that is, the sliding connection between the caliper housing 2 and the guide pin 3, further ensuring the sliding stability and reliability of the caliper housing 2, and further improving NVH performance.
[0048] In one embodiment, a first seal 4 is disposed at one end of the guide pin 3 and located between the caliper bracket 1 and the caliper housing 2. One end of the first seal 4 is connected to the caliper housing 2 and can slide with the caliper housing 2 to maintain a sealed connection with the first end of the guide hole 21 of the caliper housing 2.
[0049] In one specific embodiment, the first seal 4 includes a telescopic portion 42 and a support portion 43 located at one end of the telescopic portion 42.
[0050] The telescopic part 42 can extend and retract as the caliper housing 2 slides, thereby ensuring that the first seal 4 is always in a sealed connection with the slidable caliper housing 2 and avoiding interference with the sliding of the caliper housing 2.
[0051] The support part 43 has a first smooth surface and is used to insert between the guide pin 3 and the caliper housing 2, so that the first smooth surface contacts the guide pin 3, and the surface opposite to the first smooth surface is sealed to the caliper housing 2, so that the support part 43 can slide synchronously with the caliper housing 2 along the guide pin 3. That is, the caliper housing 2 slides on the guide pin 3 through the support part 43, which reduces the friction between it and the guide pin 3, further improves the smoothness of sliding of the caliper housing 2, and optimizes the abnormal noise of bumps and vibrations, resulting in better NVH performance.
[0052] Typically, both the guide pin 3 and the caliper housing 2 are made of metal, such as stainless steel, to ensure strength and service life. In one embodiment, the support portion 43 is made of plastic, such as PTFE (Teflon) or nylon, which has self-lubricating properties, supports the guide pin 3 to reduce vibration, and further improves the smoothness of sliding; in other alternative embodiments, the support portion 43 is made of rubber, which has a better vibration reduction effect.
[0053] Furthermore, the center of gravity of the brake caliper and / or the length of the support part 43 can be further optimized so that the center of gravity of the brake caliper falls on the support part 43. The above adjustment can be achieved by fine-tuning the position and structure of various parts of the brake caliper and / or adapting the length of the support part 43. This can be achieved by those skilled in the art without creative effort. This optimization can further enhance the effect of vibration reduction and noise elimination through the support part 43. As a result, the rubber bushing 22 of the auxiliary pin can be eliminated in the guide structure of this brake caliper, and a double master pin structure can be adopted, that is, there is no distinction between master and auxiliary pin structure, both are master pins with the same structure, reducing the number of newly developed parts and reducing development costs. At the same time, there is no need to worry about the master and auxiliary pins being installed in reverse during assembly, reducing the cost of error prevention on the production line.
[0054] Specifically, the brake caliper has two symmetrically arranged guide structures. The two guide structures of the existing brake caliper are divided into a main pin (i.e., Figure 1(a)) and a secondary pin (i.e., Figure 1(b)) according to the different guide pins. The guide pin 3 slides in the caliper bracket 1. A rubber bushing 22 is added to one of the guide pins 3. This guide pin is called the secondary pin. Its function is to improve the vibration and noise of the guide pin 3 in the guide pin hole of the caliper bracket 1 when the road surface is bumpy. The other guide pin 3 is not bushed and is called the main pin.
[0055] This guide structure improves vibration and noise through the support part 3, eliminating the need for rubber bushing 22, thus making the main and auxiliary pin structures identical.
[0056] In one specific embodiment, a first sealing structure 44 is provided between the surface of the support part 43 opposite to the first smooth surface and the caliper housing 2, such as a plurality of grooves and protrusions arranged in sequence, thereby ensuring the sealing between the two, as well as the connection stability and reliability.
[0057] In one embodiment, the first seal 4 further includes a fixing part 41 located at the other end of the telescopic part 42. The fixing part 41 is disposed near the caliper bracket 1 and is sealed to the guide pin 3, thereby ensuring the sealing of the first seal 4 to the end of the caliper housing 2.
[0058] In one specific embodiment, the guide pin 3 is provided with a sealing groove, and the fixing part 41 is installed in the sealing groove to achieve a sealing and fixed connection.
[0059] In one embodiment, the second seal 5 is a cover that covers the end of the guide pin 3 away from the first seal 4. That is, there is no need to set a sealing connection structure between the second seal 5 and the guide pin 3, which simplifies the overall structure, reduces costs, facilitates assembly, and improves the reliability of the end seal by completely covering it.
[0060] Meanwhile, the circumferential edge of the second seal 5 is used to connect with the guide hole 21 of the caliper housing 2, and the second seal 5 can slide synchronously with the caliper housing 2 to maintain a sealed connection with the second end of the guide hole 21 of the caliper housing 2 opposite to its first end.
[0061] Furthermore, the second seal 5 maintains its sealing performance through synchronous sliding, meaning it does not require expansion or contraction and does not have an expansion or contraction structure. This avoids the risk of breakage at the expansion joint caused by expansion and contraction, further improving the reliability of the seal.
[0062] In one specific embodiment, a matching second sealing structure 51, such as a groove and a protrusion, is provided between the circumferential edge of the second seal 5 and the caliper housing 2. Since the second seal 5 does not need to extend or retract, a single groove and protrusion at the connection between it and the caliper housing 2 is sufficient to meet the requirements for connection stability and reliability.
[0063] In one embodiment, the second seal 5 has a top surface and a circumferential surface adjacent to the top surface in the circumferential direction.
[0064] The top surface of the cover and the end face of the corresponding end of the guide pin 3 are spaced apart to avoid collision with the guide pin 3 during sliding, which would cause damage and affect the sealing performance.
[0065] In one embodiment, a reinforcing rib 52 is provided on the inner circumferential side of the second seal 5. The reinforcing rib 52 extends axially along the guide pin 3, thereby improving the strength of the second seal 5 and extending its service life.
[0066] Preferably, one end of the reinforcing rib 52 is used to abut against the end face of the caliper housing 2, that is, to fit the connection between the second seal 5 and the caliper housing 2, thereby improving the strength of the connection between the two and improving the stability and reliability of the connection.
[0067] For details on the working process of this brake caliper guide structure, please refer to Example 2.
[0068] Example 2:
[0069] Please see Figures 3-4 , Figure 3 This is an exploded structural diagram of the brake caliper of this application; Figure 4 This is a cross-sectional view of the brake caliper and brake disc 15 assembled according to this application.
[0070] Based on Embodiment 1, this application also provides a brake caliper, including a caliper bracket 1, a caliper housing 2, and the brake caliper guide structure of Embodiment 1.
[0071] The caliper housing 2 is provided with a through guide hole 21, and is sleeved with the guide pin 3 of the brake caliper guide structure through the guide hole 21. It can slide along the guide pin 3, thereby changing the sliding position from the connection between the caliper bracket 1 and the guide pin 3 (i.e. the original guide pin hole of the caliper bracket 1) to the connection between the guide pin 3 and the caliper housing 2 (i.e. the guide hole 21 of the caliper housing 2). This ensures that the center of gravity of the brake caliper falls completely into the sliding area (i.e. the guide hole 21 of the caliper housing 2), making the caliper housing 2 slide more smoothly and return to its original position more timely, thereby reducing caliper drag, improving friction pad wear, and enhancing NVH performance.
[0072] Furthermore, the first seal 4 and the second seal 5 of the brake caliper guide structure seal the two ends of the caliper bracket 1 respectively, which can prevent external dust and other objects from entering the guide hole 21 of the caliper housing 2, further ensuring the sliding stability and reliability of the caliper housing 2, and further improving NVH performance.
[0073] Meanwhile, the second seal 5 is a cover that covers the corresponding end of the guide pin 3. That is, there is no need to set a sealing connection structure between the second seal 5 and the guide pin 3, which simplifies the overall structure, reduces costs, facilitates assembly, and improves the reliability of the end seal.
[0074] In one embodiment, the caliper bracket 1 and the guide pin 3 are connected by a threaded structure 11. That is, the caliper bracket 1 is provided with a threaded hole, the guide pin 3 is provided with an external thread that matches the threaded hole, and is threadedly connected to the caliper bracket 1 to achieve a fixed connection between the two. This improves the ease of assembly of the guide pin 3 and the caliper bracket 1, and facilitates disassembly and maintenance in the future.
[0075] In other alternative implementations, the caliper bracket 1 and the guide pin 3 can be integrally formed, welded, or interference-fitted to achieve a fixed connection between the two.
[0076] In one embodiment, a matching stepped structure is provided between the threaded end of the caliper bracket 1 and the guide pin 3, so that the two are positioned and supported by the stepped structure when they are threaded together.
[0077] The vertical surface of the stepped structure serves as the positioning surface 12 between the guide pin 3 and the caliper bracket 1, allowing the guide pin 3 to be precisely screwed into the threaded hole of the caliper bracket 1 to a predetermined depth, thus improving the stability and reliability of the connection between the two. The horizontal surface of the stepped structure serves as the support surface 13 between the guide pin 3 and the caliper bracket 1, enabling the caliper bracket 1 to provide appropriate support for the guide pin 3, thereby improving the stability of the guide pin 3.
[0078] In one embodiment, a mounting groove is provided on the inner side of the guide hole 21 of the caliper housing 2 near the caliper bracket 1, and the first seal 4 of the brake caliper guide structure is partially embedded in the mounting groove and sealed to the caliper housing 2.
[0079] Understandably, this brake caliper also includes a piston 16, an outer friction plate 17, an inner friction plate 18, etc., and its structure and working principle are the same as those of existing brake calipers. The improvement of this brake caliper lies in the guide structure.
[0080] Specifically, the inner and outer friction pads are mounted on the caliper bracket 1. The ECU controller 30 controls the motor 32 to push the piston 16 to press the inner friction pad 18 through the drive transmission mechanism 31 until the inner friction pad presses the brake disc 15. At this time, the caliper housing 2 is subjected to a reverse force and slides to the right on the guide pin 3. As a result, the outer claw of the caliper housing 2 drives the outer friction pad 17 to clamp the brake disc 15, thereby achieving the braking purpose.
[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A brake caliper guide structure for connecting a caliper bracket and a caliper housing, characterized by, include: A guide pin, one end of which is used to be fixedly connected to the caliper bracket, and the size of the guide pin is adapted to the guide hole of the caliper housing so that the caliper housing can be sleeved with the guide pin through the guide hole and can slide along the guide pin; A first sealing element is disposed at one end of the guide pin and located between the caliper bracket and the caliper housing. One end of the first sealing element is connected to the caliper housing and can slide with the caliper housing to maintain a sealed connection with the first end of the guide hole of the caliper housing. as well as, The second seal is a cover that covers the end of the guide pin away from the first seal. The circumferential edge of the second seal is used to connect with the guide hole of the caliper housing. The second seal can slide synchronously with the caliper housing to maintain a sealed connection between the second end of the caliper housing and the guide hole of the caliper housing opposite to its first end.
2. The brake caliper guide structure according to claim 1, characterized in that, The first sealing element includes a telescopic portion and a support portion located at one end of the telescopic portion; the telescopic portion can extend and retract with the sliding of the caliper housing; the support portion has a first smooth surface and is used to insert between the guide pin and the caliper housing, such that the first smooth surface contacts the guide pin, and the surface opposite to the first smooth surface is sealed to the caliper housing, such that the support portion can slide synchronously with the caliper housing along the guide pin.
3. The brake caliper guide structure according to claim 2, characterized in that, The first seal also includes a fixing part located at the other end of the telescopic part, the fixing part being disposed near the caliper bracket and sealingly connected to the guide pin.
4. The brake caliper guide structure according to claim 1, characterized in that, The second seal has a top surface and a circumferential surface adjacent to the top surface in the circumferential direction. The top surface and the end face of the corresponding end of the guide pin are spaced apart to avoid collision with the guide pin during sliding.
5. The brake caliper guide structure according to claim 1, characterized in that, The second seal has a reinforcing rib on its inner circumferential side. The reinforcing rib extends axially along the guide pin and one end is used to abut against the end face of the caliper housing.
6. A brake caliper, characterized in that, The device includes a caliper bracket, a caliper housing, and a brake caliper guide structure as described in any one of claims 1-5. The caliper housing has a through guide hole and is sleeved with a guide pin of the brake caliper guide structure through the guide hole, and can slide along the guide pin.
7. The brake caliper according to claim 6, characterized in that, The caliper bracket is provided with a threaded hole, and the guide pin is provided with an external thread that matches the threaded hole and is threadedly connected to the caliper bracket.
8. The brake caliper according to claim 6, characterized in that, The caliper bracket has a matching stepped structure between the threaded hole end and the guide pin, which enables positioning and support when the two are threaded together.
9. The brake caliper according to claim 6, characterized in that, The guide hole of the caliper housing has a mounting groove on the inner side of one end near the caliper bracket. The first sealing part of the brake caliper guide structure is embedded in the mounting groove and is sealed to the caliper housing.