Brake assembly capable of solving low-frequency braking noise
By introducing a steel three-wishbone connecting plate into the brake assembly, the axial stiffness consistency of the steering knuckle lugs is improved, the low-frequency braking noise problem is solved, the overall vehicle comfort is enhanced, and production costs are saved.
Patent Information
- Application Number
- CN202520220633.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Low-frequency braking noise is a problem that is difficult to solve in the brake assembly, especially the braking noise frequency in the 450-600Hz range caused by inconsistent stiffness of the steering knuckle lugs, which is difficult to control and affects the driving comfort of the car.
A steel three-wishbone connecting plate is introduced into the brake assembly. The connecting plate improves the axial stiffness consistency of the two mounting lugs of the steering knuckle, ensuring that the connection stiffness at both ends of the bracket is consistent.
It effectively solved the problem of low-frequency braking noise in the 450-600Hz frequency range, reduced production costs and improved the overall vehicle comfort, while avoiding the need for major adjustments to the design scheme and the reopening of the casting mold.
Smart Images
Figure CN223894813U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive braking technology and relates to a brake assembly that solves low-frequency braking noise. Background Technology
[0002] When the brakes apply pressure, the contact surface between the friction pads and the brake disc experiences minute slippage. This slippage causes fluctuations in the coefficient of friction, which in turn lead to fluctuations in the frictional torque, generating frictional excitation. Under this frictional excitation, the low-frequency modes of the braking system are easily excited. Furthermore, some similar modes can couple under certain conditions, causing the system to become unstable. Under continuous excitation, the vibration pair value increases, resulting in low-frequency braking noise (450-600Hz). Research has shown that the worse the consistency of the stiffness of the steering knuckle caliper mounting lugs, the more easily the first-order bending and torsional modes of the brake couple, generating unacceptable braking noise. Conversely, the higher the consistency of the lug stiffness, the lower the incidence of low-frequency braking noise.
[0003] As customers demand higher levels of driving comfort, major OEMs are also raising their requirements for brake noise performance, leading to more complaints from end customers. However, reducing brake noise means increased manufacturing costs. Therefore, while meeting brake noise performance requirements, it is essential to simultaneously achieve lightweight and universal brake structure design. Utility Model Content
[0004] In view of this, the purpose of this utility model is to solve the assembly problem between the brake assembly and the bearing in order to solve low-frequency braking noise, and to provide a brake assembly that solves low-frequency braking noise.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A brake assembly for solving low-frequency braking noise includes a brake caliper assembly, a steering knuckle assembly, and a brake disc. The brake caliper assembly is fixedly connected to a bracket. Both ends of the bracket are mounted to two lugs of the steering knuckle hub by two connecting bolts. A connecting plate is provided on the outer side of the steering knuckle hub. One end of the connecting plate is bolted to the steering knuckle hub, and the other end is connected to the connecting bolt at one end of the bracket. The connecting plate ensures that the connection stiffness at both ends of the bracket is consistent.
[0007] Furthermore, the connecting plate is a three-pronged arm, and connecting holes are provided at the ends of the three prongs and at the intersection of the three prongs; three mounting holes are provided around the center hole of the steering knuckle hub; the connecting hole at the end of one prong of the three-pronged arm is connected to the connecting bolt, and the other three connecting holes are connected to the three mounting holes of the steering knuckle hub one by one by bolts.
[0008] Furthermore, the connecting hole is a through hole, and the diameter of the through hole is 1 mm larger than the diameter of the threaded hole.
[0009] Furthermore, the connecting plate is made of steel with a thickness of >2mm.
[0010] The beneficial effects of this utility model are as follows:
[0011] This invention provides a solution to low-frequency braking noise by adding a steel three-wishbone connecting plate. This improves the consistency of the axial stiffness (perpendicular to the brake disc braking surface) of the two mounting lugs of the steering knuckle, effectively solving the noise at frequencies around 450-600Hz generated in actual vehicles. For manufacturers, this method avoids excessive adjustments to the design during product development, eliminates the need to restart casting and machining molds, saves costs, ensures development progress, and reduces costs for the company in resolving development and after-sales issues. For users, this method solves NVH problems, eliminates customer complaints, and improves the level and quality of NVH development.
[0012] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description
[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:
[0014] Figure 1 This is a schematic diagram of the brake assembly structure for solving low-frequency braking noise in this utility model.
[0015] Reference numerals in the attached drawings: 1-Steering knuckle assembly; 2-Brake caliper assembly; 3-Brake disc; 4-Bracket; 5-Connecting plate; 6-First lug; 7-Second lug; 8-Bolt. Detailed Implementation
[0016] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0017] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0018] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0019] Please see Figure 1 This is a brake assembly for solving low-frequency braking noise, including a brake caliper assembly 2, a steering knuckle assembly 1, and a brake disc 3. The brake caliper assembly 2 is fixedly connected to a bracket 4. The two ends of the bracket 4 are installed on the first lug 6 and the second lug 7 of the steering knuckle hub by two connecting bolts. A connecting plate 5 is provided on the outer side of the steering knuckle hub. One end of the connecting plate 5 is connected to the steering knuckle hub by a bolt 8, and the other end is connected to the connecting bolt of the second lug 7. The connecting plate 5 makes the connection stiffness of the two ends of the bracket 4 consistent.
[0020] In this embodiment, the connecting plate 5 is a three-way arm, and connecting holes are provided at the ends of the three forks and the intersection of the three forks; three mounting holes are provided around the center hole of the steering knuckle hub; the connecting hole at the end of one of the three forks is connected to the connecting bolt, and the other three connecting holes are connected to the three mounting holes of the steering knuckle hub one by one by bolts 8.
[0021] The connecting hole is a through hole, and the diameter of the through hole is 1mm larger than the diameter of the threaded hole.
[0022] The connecting plate 5 is made of steel with a thickness of >2mm.
[0023] This invention improves the consistency of axial stiffness (perpendicular to the brake disc brake surface) of the two mounting lugs of the steering knuckle by adding a steel three-wishbone connecting plate, thereby solving the low-frequency braking noise problem caused by insufficient axial stiffness consistency of the steering knuckle lugs. This saves significant development costs and helps improve overall vehicle comfort.
[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A brake assembly for solving low-frequency braking noise, comprising a brake caliper assembly, a steering knuckle assembly, and a brake disc, characterized in that: The brake caliper assembly is fixedly connected to the bracket. The two ends of the bracket are installed on the two lugs of the steering knuckle hub by two connecting bolts. A connecting plate is provided on the outer side of the steering knuckle hub. One end of the connecting plate is connected to the steering knuckle hub by bolts, and the other end is connected to the connecting bolt at one end of the bracket. The connecting plate makes the connection stiffness of the two ends of the bracket consistent.
2. The brake assembly for solving low-frequency braking noise according to claim 1, characterized in that: The connecting plate is a three-pronged arm, and connecting holes are provided at the ends of the three prongs and at the intersection of the three prongs; three mounting holes are provided around the center hole of the steering knuckle hub; the connecting hole at the end of one of the three prongs is connected to the connecting bolt, and the other three connecting holes are connected to the three mounting holes of the steering knuckle hub one by one by bolts.
3. The brake assembly for solving low-frequency braking noise according to claim 2, characterized in that: The connecting hole is a through hole, and the diameter of the through hole is 1 mm larger than the diameter of the threaded hole.
4. The brake assembly for solving low-frequency braking noise according to claim 2, characterized in that: The connecting plate is made of steel and has a thickness of >2mm.