Anti-vibration self-clamping snap spring for brake caliper
By designing a combined structure of U-shaped bending clamping foot, arc-shaped compression fit section and limit-proof bending section on the brake caliper, the problem of abnormal spring noise in new energy vehicles under vibration conditions is solved, and the effect of stable clamping and reducing abnormal noise is achieved.
Patent Information
- Application Number
- CN202422489358.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-15
- Publication Date
- 2025-08-19
- Estimated Expiration
- 2034-10-15
AI Technical Summary
When new energy vehicles accelerate/brake or bump on roads, traditional spring designs are prone to vibration and abnormal noise. The reason is that the clamping force is insufficient, which causes relative movement and collision of the spring relative to the guide pin, resulting in abnormal noise.
The U-shaped bending clamping foot and arc-shaped compression fitting section structure is adopted to add limit anti-bending sections to ensure stable clamping of the clamping spring and the guide pin, prevent rotation and displacement, and to fit the brake caliper casting surface through the limit anti-bending section to prevent rotation of the clamping spring.
Effectively prevent the spring from rotating and displaced under high acceleration, reduce collision with peripheral parts, ensure stable clamping force, reduce abnormal noise, and improve NVH performance.
Smart Images
Figure CN223241940U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of brake systems, in particular to an anti-vibration self-clamping clip spring for a brake caliper. Background Art
[0002] The current mainstream trend of market development is new energy vehicles and electric vehicles. Compared with fuel vehicles, new energy vehicles use electric motors instead of internal combustion engines, so they have the characteristics of rapid acceleration and good quietness.
[0003] Since the cabin of new energy electric vehicles is much quieter than that of ordinary fuel vehicles, the vehicle will be more sensitive to various abnormal noises produced when accelerating / braking suddenly, or passing through various bumpy roads. Therefore, the OEM client has put forward more stringent NVH noise performance requirements than for fuel vehicles.
[0004] Vehicle road tests have confirmed that conventional R-type circlip designs are prone to producing a vibrational noise (rattle noise) under high acceleration that cannot be masked by ambient noise. This noise is primarily caused by insufficient clamping force between the circlip and the guide pin. When subjected to multi-directional vehicle vibration, the circlip moves relative to the guide pin, colliding with the guide pin itself and the caliper housing, resulting in the rattle. Summary of the Invention
[0005] In order to overcome the deficiencies of the prior art, the utility model provides a vibration-resistant self-clamping retaining spring for a brake caliper. The retaining spring adopts a U-shaped bent clamping foot structure and an arc-shaped pressing fitting section structure, which can further be clamped together with a guide pin; and a limiting anti-turning section is added, which can effectively prevent the retaining spring from rotating and shifting during actual use.
[0006] In order to achieve the above-mentioned purpose, a vibration-resistant self-clamping retaining spring for a brake caliper is designed, comprising a retaining spring body, characterized in that the retaining spring body is composed of a U-shaped bent retaining foot, an arc-shaped pressing fit section, a position-limiting anti-turning section, and a straight section, and the U-shaped bent retaining foot, the arc-shaped pressing fit section, the position-limiting anti-turning section, and the straight section are sequentially connected to form an integrally formed structure.
[0007] The limit anti-turning fold section is a U-shaped structure, and the closed end of the limit anti-turning fold section is bent inward to fit the casting surface of the brake caliper, one end of the opening of the limit anti-turning fold section is connected to one end of the arc-shaped press-fit section, and the other end of the opening of the limit anti-turning fold section is connected to one end of the straight section.
[0008] One end of the straight section is connected to the other end of the opening of the position-limiting anti-bending section, and the other end of the straight section passes through the tail of the guide pin and is located below the U-shaped bending foot.
[0009] The arc-shaped press-fit section is an arc section structure, and the arc section of the arc-shaped press-fit section fits the outer edge side of the guide pin; one end of the arc-shaped press-fit section is connected to one end of the opening of the limit anti-turning section, and the other end of the arc-shaped press-fit section is connected to the U-shaped bending foot.
[0010] The U-shaped bent foot has a U-shaped structure, one end of the U-shaped bent foot is connected to the other end of the arc-shaped compression fit section, and the other end of the U-shaped bent foot is located in front of the other end of the straight section and is clamped with the fourth quadrant area of the guide pin diameter circle.
[0011] Compared with the existing technology, the present invention provides a vibration-resistant self-clamping retaining spring for brake calipers, which adopts a U-shaped bent clamping foot structure and an arc-shaped pressing fitting section structure, which can further be clamped and fitted with a guide pin; and adds a limiting anti-turning section, which can effectively prevent the retaining spring from rotating and shifting during actual use. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic structural diagram of the utility model.
[0013] Figure 2 This is a schematic diagram of the installation of the utility model and the guide pin.
[0014] Figure 3 for Figure 2 main view.
[0015] Figure 4 This is a schematic diagram of the utility model being installed on a brake caliper.
[0016] Figure 5 This is a front schematic diagram of the utility model when installed in the forward direction.
[0017] Figure 6 This is a side schematic diagram of the utility model when installed forward.
[0018] Figure 7 This is a front view of the utility model when it is installed in reverse.
[0019] Figure 8 This is a side view of the reverse installation of the utility model.
[0020] See also Figures 1 to 4 , 1 is a U-shaped bent foot, 2 is an arc-shaped pressing fit section, 3 is a limit anti-bending section, 4 is a straight section, and 5 is a guide pin. DETAILED DESCRIPTION
[0021] The present invention will be further described below with reference to the accompanying drawings.
[0022] like Figures 1 to 4As shown, the retaining spring body is composed of a U-shaped bent foot 1, an arc-shaped pressing fit section 2, a limit anti-bending section 3, and a straight section 4, and the U-shaped bent foot 1, the arc-shaped pressing fit section 2, the limit anti-bending section 3, and the straight section 4 are connected in sequence to form an integrated structure.
[0023] The limiting anti-turning fold section 3 has a U-shaped structure, and the closed end of the limiting anti-turning fold section 3 is bent inward to fit the casting surface of the brake caliper. One end of the opening of the limiting anti-turning fold section 3 is connected to one end of the arc-shaped press-fit section 2, and the other end of the opening of the limiting anti-turning fold section 3 is connected to one end of the straight section 4.
[0024] One end of the straight section 4 is connected to the other end of the opening of the position-limiting anti-bending section 3 , and the other end of the straight section 4 passes through the tail of the guide pin 5 and is located below the U-shaped bending foot 1 .
[0025] The arc-shaped pressing fit section 2 is an arc segment structure, and the arc segment of the arc-shaped pressing fit section 2 is fitted with the outer edge side of the guide pin 5; one end of the arc-shaped pressing fit section 2 is connected to one end of the opening of the limiting anti-turning section 3, and the other end of the arc-shaped pressing fit section 2 is connected to the U-shaped bending foot 1.
[0026] The U-shaped bent clamping foot 1 has a U-shaped structure, one end of the U-shaped bent clamping foot 1 is connected to the other end of the arc-shaped pressing fit section 2, and the other end of the U-shaped bent clamping foot 1 is located in front of the other end of the straight section 4 and is clamped with the fourth quadrant area of the diameter circle of the guide pin 5.
[0027] Advantages of U-shaped bending foot 1:
[0028] 1. Ensure that the U-shaped bend foot 1 and the guide pin 5 maintain a clamping fit in the fourth quadrant of the diameter circle, thereby adding a clamping force.
[0029] 2. Make the retaining spring body firmly clamp the guide pin 5. When the vehicle vibrates under high acceleration, the retaining spring body will not collide with surrounding parts and produce abnormal noise.
[0030] 3. Ensure that the U-shaped bent clamping foot 1 is always located in the guide inclined area at the tail of the guide pin 5, realizing a stable and continuous self-clamping function; regardless of the working conditions, the clamping spring body can always be clamped on the outer diameter of the guide pin 5, ensuring the stability of the clamping force of the U-shaped bent clamping foot 1.
[0031] 4. Ensure that the circlip body can only be inserted into the guide pin 5 from the front and not from the back, to ensure assembly consistency and product functional accuracy.
[0032] like Figure 5 , Figure 6 As shown, when the retaining spring body is inserted forward, the inclination angle of the U-shaped bent retaining foot 1 slides into the installation along the inclined surface of the tail of the guide pin 5.
[0033] like Figure 7 , Figure 8 As shown, when the retaining spring body is inserted in reverse, the retaining foot of the U-shaped bent retaining foot 1 cannot cross the diameter circle of the guide pin 5, so the retaining spring body cannot be fully inserted into the guide pin 5.
[0034] 5. The U-shaped bent foot 1 passes through the guide slope at the tail of the guide pin 5. When installed, it is tilted at a certain angle and slides into the tail hole of the guide pin 5, which is convenient for assembly and saves time and effort.
[0035] Advantages of the arc-shaped tightening fit section 2: The clamping fit area of the arc-shaped tightening fit section 2 is a triangular structure, the purpose of which is to achieve two-point contact between the retaining ring body and the outer arc surface of the guide pin 5. At the same time, the relevant dimensions are adaptively adjusted to ensure that the contact points are as close as possible to the 3 o'clock and 9 o'clock directions of the diameter circle of the guide pin 5, thereby achieving greater clamping force.
[0036] Advantages of the limited anti-turning section 3:
[0037] 1. The position-limiting and anti-rotation feature of the anti-bending segment 3 cooperates with the casting surface of the brake caliper to prevent the circlip body from rotating and shifting;
[0038] 2. The structure of the position-limiting anti-bending section 3 is convenient for grabbing and installation on the production line.
Claims
1. A vibration-resistant self-clamping circlip for a brake caliper, comprising a circlip body, characterized in that: The clamping spring body is composed of a U-shaped bent clamping foot (1), an arc-shaped pressing fitting section (2), a limit anti-bending section (3), and a straight section (4), and the U-shaped bent clamping foot (1), the arc-shaped pressing fitting section (2), the limit anti-bending section (3), and the straight section (4) are sequentially connected to form an integrally formed structure.
2. The anti-vibration self-clamping circlip for a brake caliper according to claim 1, characterized in that: The position-limiting anti-bending folding section (3) is of a U-shaped structure, and the closed end of the position-limiting anti-bending folding section (3) is bent inwardly to fit the casting surface of the brake caliper, one end of the opening of the position-limiting anti-bending folding section (3) is connected to one end of the arc-shaped press-fit section (2), and the other end of the opening of the position-limiting anti-bending folding section (3) is connected to one end of the straight section (4).
3. The anti-vibration self-clamping circlip for a brake caliper according to claim 1, characterized in that: One end of the straight section (4) is connected to the other end of the opening of the position-limiting anti-bending section (3), and the other end of the straight section (4) passes through the tail of the guide pin and is located below the U-shaped bending foot (1).
4. The anti-vibration self-clamping circlip for a brake caliper according to claim 1, characterized in that: The arc-shaped pressing fit section (2) is an arc-shaped section structure, and the arc-shaped section of the arc-shaped pressing fit section (2) is fitted with the outer edge of the guide pin; one end of the arc-shaped pressing fit section (2) is connected to one end of the opening of the position-limiting anti-bending section (3), and the other end of the arc-shaped pressing fit section (2) is connected to the U-shaped bending foot (1).
5. The anti-vibration self-clamping circlip for a brake caliper according to claim 1, characterized in that: The U-shaped bent clamping foot (1) has a U-shaped structure, one end of the U-shaped bent clamping foot (1) is connected to the other end of the arc-shaped press-fit section (2), and the other end of the U-shaped bent clamping foot (1) is located in front of the other end of the straight section (4) and is clamped with the fourth quadrant area of the guide pin diameter circle.