Automobile electromagnetic brake caliper and vehicle

Abstract

The application discloses a kind of automobile electromagnetic brake caliper and vehicle, belong to automobile parts technical field, including mounting bracket, caliper body, guide pin, electric control assembly, electromagnetic brake lever and piston;The caliper body is slidably connected with mounting bracket by guide pin;The electric control assembly is electrically connected with electromagnetic brake lever;One end of the electromagnetic brake lever is fixedly installed in the central cavity of piston, the other end of the electromagnetic brake lever is fixedly connected with caliper body, and the piston is axially slidably connected with the inner cavity of caliper body;The caliper structure of the application is directly driven piston by electromagnetic brake lever, completely gives up hydraulic transmission chain and rotary motor mechanical transmission mechanism, eliminates hydraulic hysteresis and transmission component fatigue failure defect, brake response time is controlled within 100ms, response speed is faster, control precision is higher, can match high-order automatic driving active brake, emergency control requirement, effectively shorten brake distance, improve driving brake safety and system long-term operation reliability.

Description

Technical Field

[0001] This application belongs to the field of automotive parts technology, and specifically relates to an automotive electromagnetic brake caliper and vehicle. Background Technology

[0002] With the intelligent upgrading of the automotive industry, intelligent driving has become the mainstream direction of the industry. L3 and L4 high-level autonomous driving have stringent requirements for the real-time coordination of vehicle perception, decision-making and execution systems. As the core execution component of active safety, the braking system's response speed directly determines the performance of functions such as emergency obstacle avoidance and vehicle stability control.

[0003] Most existing mass-produced vehicles are equipped with traditional hydraulic braking systems. Due to the compressibility of the hydraulic fluid, pipeline resistance, and transmission clearance, the braking distance is relatively long, making it difficult to meet the millisecond-level braking requirements of advanced autonomous driving. In the electric motor direct-drive braking structure, the motor and transmission mechanism are continuously subjected to alternating loads such as brake disc vibration. Long-term high-frequency start-stop is prone to wear, thermal fade, and fatigue failure, resulting in reduced braking accuracy, shorter lifespan, and the risk of braking failure.

[0004] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0005] To address the aforementioned issues, this application provides an automotive electromagnetic brake caliper and vehicle. By employing a caliper structure with a direct-drive piston using an electromagnetic brake lever, it solves problems such as hydraulic lag and fatigue failure of transmission components caused by the hydraulic transmission link and the mechanical transmission mechanism of the rotary motor.

[0006] An automotive electromagnetic brake caliper includes a mounting bracket, a caliper body, a guide pin, an electronic control assembly, an electromagnetic brake lever, and a piston. The clamp body is slidably engaged with the mounting bracket via a guide pin; The electronic control assembly is electrically connected to the electromagnetic brake lever; One end of the electromagnetic brake rod is fixedly installed in the central cavity of the piston, and the other end of the electromagnetic brake rod is fixedly connected to the clamp body. The piston and the inner cavity of the clamp body are axially slidably connected. The mounting bracket is slidably connected to a first brake pad and a second brake pad that are disposed opposite to each other. One end of the piston is in contact with the first brake pad, and the second brake pad is adapted to the outer end of the caliper body. The mounting bracket is equipped with a reset mechanism, which is used to push the first brake pad and the second brake pad to reset and disengage from the brake disc after the brake is released.

[0007] Furthermore, the reset mechanism includes two spring plates, which are respectively engaged between the mounting bracket and the first brake pad, and between the mounting bracket and the second brake pad.

[0008] Furthermore, the mounting bracket is an aluminum alloy casting component, and the surface of the mounting bracket is provided with an anodized wear-resistant protective layer. The mounting bracket is fixedly installed on the vehicle steering knuckle by bolts. The clamp body is configured with a U-shaped structure. The electronic control assembly is fixedly connected to the outer wall of the clamp body by bolts. The clamp body spans above the mounting bracket and is fixedly connected to the mounting bracket. A guide pin is fixedly connected to the clamp body, and the guide pin is slidably connected to the mounting bracket. The clamp body spans above the mounting bracket.

[0009] Furthermore, the mounting bracket has two symmetrically formed guide holes, and two guide pins are provided, with each guide pin slidably connected to its corresponding guide hole; the outer end of each guide pin is fixedly connected to the clamp body by a guide pin screw.

[0010] Furthermore, a guide pin dust cover adapted to the guide pin is fixedly installed between the outer wall of each guide hole and the clamp body. The guide pin dust cover is a component made of elastic material.

[0011] Furthermore, the guide pin is a cylindrical pin, and the pin diameter is set to 12-18mm.

[0012] Furthermore, an O-ring is fitted between the piston and the piston cavity of the clamp body, and the O-ring is used to achieve sealing and protection of the piston cavity.

[0013] Furthermore, the electromagnetic brake rod includes a cylindrical iron core and a conductive coil. The cylindrical iron core is the main body of the magnetic circuit, and the conductive coil is wound in multiple turns around the outside of the cylindrical iron core. When the conductive coil is energized, it magnetizes the cylindrical iron core and cooperates with the brake disc made of magnetically conductive material to form a closed magnetic circuit.

[0014] Furthermore, both the first and second brake pads are made of non-metallic wear-resistant materials, and the thickness of both the first and second brake pads is set to 8-12mm.

[0015] Furthermore, the piston is integrally made of non-magnetic insulating material, and its internal hollow structure is adapted to the shape of the electromagnetic brake rod for the electromagnetic brake rod to pass through and be installed.

[0016] A vehicle includes a vehicle body and the aforementioned automotive electromagnetic brake caliper, the automotive electromagnetic brake caliper being mounted on the vehicle body.

[0017] Compared with the prior art, this application has the following advantages: 1. This invention completely eliminates the hydraulic transmission link and the rotary motor mechanical transmission mechanism by adopting a caliper structure with an electromagnetic brake lever that drives the piston. This eliminates the defects of hydraulic lag and fatigue failure of transmission components, and the braking response time is controlled within 100ms. The response speed is faster and the control precision is higher. It can match the requirements of high-level autonomous driving active braking and emergency avoidance control, effectively shorten the braking distance, and improve the driving braking safety and long-term operational reliability of the system.

[0018] 2. This invention achieves rapid and uniform brake pad return by using a dual-spring independent reset structure, a symmetrical dual-guide pin structure with dust protection, a piston sealing structure, and an optimized design of a non-magnetic insulated piston, thus eliminating brake drag, abnormal wear, and abnormal noise. The guide slides smoothly and prevents jamming; the cavity is dustproof, rustproof, and durable; the magnetic circuit utilization rate is high; eddy current heating and electromagnetic interference are low; the overall structure is compact and lightweight; assembly and maintenance are convenient; environmental adaptability is strong; and it is easy to integrate and mass-produce the vehicle's line-of-wire braking platform, while reducing vehicle driving energy consumption and subsequent maintenance costs.

[0019] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 An overall schematic diagram of the present invention is shown; Figure 2 It shows Figure 1 Schematic diagram of the cross section at point AA; Figure 3 A cross-sectional schematic diagram of the present invention is shown.

[0022] Legend: 1. Mounting bracket; 101. Guide hole; 102. Dust cover for guide pin; 103. First brake pad; 104. Second brake pad; 105. Spring plate; 2. Clamp body; 201. Guide pin; 202. Guide pin screw; 203. Electromagnetic brake lever; 204. Piston; 3. Electronic control assembly; 301. Electronic control assembly fixing bolt. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] like Figure 1 As shown, this invention provides an automotive electromagnetic brake caliper, including a mounting bracket 1, a caliper body 2, a guide pin 201, an electronic control assembly 3, an electromagnetic brake lever 203, and a piston 204. The caliper body 2 is slidably engaged with the mounting bracket 1 via the guide pin 201. The electronic control assembly 3 is electrically connected to the electromagnetic brake lever 203. One end of the electromagnetic brake lever 203 is fixedly installed in the central cavity of the piston 204, and the other end of the electromagnetic brake lever 203 is fixedly connected to the caliper body 2. The piston 204 is axially slidably connected to the inner cavity of the caliper body 2. A first brake pad 103 and a second brake pad 104 are slidably connected on the mounting bracket 1, with one end of the piston 204 fitting against the first brake pad 103 and the second brake pad 104 adapted to the outer end of the caliper body 2. The mounting bracket 1 is provided with a reset mechanism, which is used to push the first brake pad 103 and the second brake pad 104 to reset and disengage from the brake disc after the brake is released. This application takes into account that existing mass-produced vehicles generally use traditional hydraulic braking systems. Due to factors such as the compressibility of hydraulic oil, pipeline transmission resistance, and mechanical transmission clearance, the system pressure build-up response is severely delayed, with braking delays reaching up to 300ms and braking distances being too long. This makes it difficult to meet the stringent requirements of L3 and L4 level high-level autonomous driving for millisecond-level high-precision and high-real-time braking control. At the same time, existing direct-drive electric motor braking structures rely on rotating motors and transmission mechanisms to withstand the disc surface jump, friction coefficient fluctuations, and rotational inertia impacts caused by the high-speed rotation of the brake disc. The motor and transmission components are constantly under high-frequency start-stop and dynamic load change conditions, making them prone to mechanical wear, thermal fade, and fatigue failure, resulting in decreased braking accuracy, shortened service life, and significant safety hazards. In addition, traditional braking structures have poor brake pad return after brake release, easily causing dragging wear, abnormal noise, and increased energy consumption, resulting in poor overall reliability and adaptability. Therefore, this application adopts an electromagnetic brake lever 203 in conjunction with a piston 204 as the core drive structure, and uses the electronic control assembly 3 to precisely control the energized current to generate electromagnetic... The driving force directly drives the piston 204 to move linearly axially within the clamp 2, pushing the first brake pad 103 and the second brake pad 104 to clamp the brake disc, achieving rapid braking. Compared with existing technologies, this application adopts an electromagnetic direct-drive braking scheme, abandoning the traditional hydraulic pipeline pressure-building structure and motor mechanical transmission structure, effectively eliminating hydraulic hysteresis and motor transmission fatigue defects, controlling the braking response time to within 100ms, significantly improving braking real-time performance and control accuracy, meeting the braking control requirements of advanced autonomous driving, effectively shortening the braking distance, and improving driving safety. At the same time, this application has no rotating transmission components, fundamentally avoiding wear, thermal fade, and mechanical failure problems caused by high-frequency load impact, significantly improving the service life and operational reliability of the braking system. With the help of a dedicated reset mechanism, the brake pads can be accurately returned to their original position, eliminating braking drag, abnormal wear, and abnormal noise problems, and reducing the overall vehicle driving energy consumption. In addition, this application has a high degree of structural integration, compact layout, excellent protection performance, and strong environmental adaptability, which facilitates the integration of the whole vehicle's brake-by-wire system and its platform-based mass production application.

[0025] During operation, the electronic control assembly 3 on the outer wall of the caliper 2 receives the braking signal and energizes the electromagnetic brake lever 203. After being magnetized, the electromagnetic brake lever 203 generates electromagnetic driving force, which directly drives the piston 204 to slide axially along the piston cavity of the caliper 2, pushing the first brake pad 103 to press against the inner side of the brake disc. Based on the caliper structure characteristics, the reaction force generated by the piston 204 drives the U-shaped caliper 2 to slide along the guide pin 201 as a whole, so that the outer end of the caliper 2 pushes the second brake pad 104 to press against the outer side of the brake disc. The vehicle braking is achieved by the brake pads on both sides clamping the brake disc synchronously. When the brake is released, the electromagnetic brake lever 203 is de-energized and demagnetized, the electromagnetic driving force disappears, and the reset mechanism on the mounting bracket 1 synchronously drives the first brake pad 103 and the second brake pad 104 to quickly reset and disengage from the brake disc, completely eliminating brake drag. The guide pin 201 always floats and guides the caliper 2, ensuring that the braking and reset process is smooth and accurate, completing the entire braking cycle.

[0026] like Figure 3 As shown, the reset mechanism includes two spring plates 105, which are respectively snapped between the mounting bracket 1 and the first brake plate 103, and between the mounting bracket 1 and the second brake plate 104. It should be noted that, considering that existing brake calipers, after brake release, are prone to brake pads failing to return to their original position in a timely manner due to the residual thrust of the piston 204, the adhesion force of the disc surface, and the mechanical friction, this leads to prolonged contact and drag between the brake pads and the brake disc, resulting in abnormal wear, brake disc overheating, increased driving resistance, and increased fuel consumption. Furthermore, conventional spring return structures often use independent coil springs, which suffer from cumbersome assembly, large space requirements, uneven force distribution, and susceptibility to loosening and fatigue. Long-term use can easily lead to malfunctions such as incomplete return on one side, uneven brake pad wear, and abnormal braking noise, severely affecting the smoothness and durability of the braking system and failing to meet the operational requirements of high-precision electromagnetic braking. Therefore, this application adopts a dual-spring-plate 105 split return structure, with the two spring plates 105 independently snapped onto the mounting bracket. The assembly structure between the bracket 1 and the first brake pad 103, and between the mounting bracket 1 and the second brake pad 104, is stable and without loosening. In addition, the independent spring plates 105 on both sides correspond to the two sets of brake pads respectively, which can realize the synchronous and uniform reset of the brake pads on both sides, completely solving the problem of brake pad drag after the brake is released. It effectively avoids abnormal wear and high temperature of the brake disc and brake pads, reduces the drag resistance of the vehicle, reduces energy consumption, eliminates brake drag noise, and improves braking smoothness. The reset is achieved by the elastic deformation of the spring plate 105, which has a fast response speed and high reset accuracy. There is no mechanical transmission gap, which perfectly matches the millisecond-level fast response characteristics of electromagnetic braking. It ensures that each braking and reset action is accurate and consistent, improves the overall control accuracy and working consistency of the braking system, and adapts to the precise braking control requirements of high-level autonomous driving. When the vehicle brakes, the electromagnetic brake lever 203 drives the piston 204 to push the first brake pad 103, and the caliper 2 drives the second brake pad 104 to clamp the brake disc in both directions. The first brake pad 103 and the second brake pad 104 squeeze the corresponding spring pads 105 to cause elastic deformation and store elastic potential energy. When the brake is released and the electromagnetic brake lever 203 is de-energized and demagnetized, the axial driving force of the piston 204 disappears completely, and the spring pads 105 on both sides release the stored elastic potential energy. Relying on their own elastic restoring force, they synchronously pull the first brake pad 103 and the second brake pad 104 to move in opposite directions, so that the brake pads on both sides quickly and evenly disengage from the brake disc, achieve precise reset, and completely release the brake contact state.

[0027] like Figure 1 As shown, the mounting bracket 1 is an aluminum alloy casting component, and the surface of the mounting bracket 1 is provided with an anodized wear-resistant protective layer. The mounting bracket 1 is fixedly installed on the vehicle steering knuckle by bolts. The clamp body 2 is configured with a U-shaped structure. The electronic control assembly 3 is fixedly connected to the outer wall of the clamp body 2 by electronic control assembly bolts 301. The clamp body 2 spans above the mounting bracket 1. The clamp body 2 spans above the mounting bracket 1 and is fixedly connected to the mounting bracket 1. A guide pin 201 is fixedly connected to the clamp body 2, and the guide pin 201 is slidably connected to the mounting bracket 1.

[0028] This application uses aluminum alloy casting for the mounting bracket 1. Compared with the traditional cast iron structure, it significantly reduces the overall weight of the caliper while ensuring the overall structural strength and installation rigidity. This is beneficial for achieving vehicle lightweighting, reducing vehicle energy consumption, and improving the vehicle's range performance. The aluminum alloy material has excellent formability and structural integrity, and can integrally form complex mounting structures and guide holes 101. It has high structural precision and good integrity, and can provide a stable and reliable mounting reference for the caliper body 2, guide pin 201, first brake pad 103 and second brake pad 104, ensuring the assembly stability and uniform force distribution of the overall structure during braking. At the same time, the surface of the mounting bracket 1 is provided with an anodized wear-resistant protective layer, which effectively improves the surface hardness, wear resistance and corrosion resistance. It can resist the erosion of mud, water and sand during driving and environmental oxidation corrosion, avoiding problems such as rust, wear and peeling of the mounting bracket 1 after long-term use, and significantly improving the service life of the overall caliper structure and its adaptability to harsh working conditions.

[0029] like Figure 1-2 As shown, two guide holes 101 are symmetrically opened on the mounting bracket 1, and two guide pins 201 are provided. The two guide pins 201 are slidably connected to the corresponding guide holes 101 respectively; the outer end of the guide pin 201 is fixedly connected to the clamp body 2 by guide pin screws 202. Each of the guide holes 101 has a guide pin dust cover 102 that is adapted to the guide pin 201 fixedly installed between the outer wall of the guide hole 101 and the clamp body 2. The guide pin dust cover 102 is an elastic material component. The guide pin 201 is a cylindrical pin, and the diameter of the guide pin 201 is set to 12-18mm; It should be further explained that existing floating brake calipers generally suffer from poor stability of the guide structure, slippage eccentricity, and uneven force distribution. Single guides or guide structures with poor fitting precision are prone to defects such as caliper body 2 sliding jamming, brake pad uneven wear, brake deviation, and uneven brake clearance. Simultaneously, the guide pin 201 is constantly exposed, making it easy for mud, dust, and rainwater to enter the sliding fit clearance during vehicle operation, causing corrosion, buildup, and wear on the guide pin 201. This, in turn, leads to malfunctions such as uneven caliper body 2 floating, brake lag, reset jamming, and brake drag, severely affecting the high-frequency, fast, and high-precision braking response characteristics of the electromagnetic brake caliper, and reducing the reliability and service life of the braking system. Therefore, this application adopts a symmetrical arrangement of double guide holes 101 and double cylindrical guide pins 201 fitting structure. The outer end is fastened to the caliper body 2 by guide pin screw 202. The guide pin 201 body is slidably assembled inside the guide hole 101 of the mounting bracket 1. During braking, the caliper body 2 is subjected to the counter thrust of the piston 204. Through the two guide pins 201, it slides smoothly along the axial direction of the guide hole 101, realizing the overall floating follow of the caliper body 2, and ensuring that the brake pads on both sides clamp the brake disc synchronously. During the braking reset process, the double guide pins 201 continue to limit and guide the caliper body 2 axially, ensuring that the caliper body 2 returns to the center without deviation. At the same time, the elastic guide pin dust cover 102 set between the guide hole 101 and the caliper body 2 always wraps the sliding area of ​​the guide pin 201. It adapts to the sliding expansion and contraction deformation with the sliding of the caliper body 2, and provides full sealing protection for the sliding mating area, preventing the intrusion of external impurities and ensuring that the sliding process of the guide pin 201 is clean and smooth.

[0030] An O-ring is fitted between the piston 204 and the piston cavity of the clamp 2, and the O-ring is used to achieve sealing and protection of the piston cavity. This application incorporates an O-ring seal between the piston 204 and the piston cavity, creating a reliable radial seal for the sliding fit clearance of the piston 204. On one hand, this effectively prevents external impurities such as mud, dust, and sand from intruding into the piston cavity, avoiding impurity accumulation that could cause piston 204 to become stuck, experience abnormal movement resistance, or suffer abnormal wear on the inner wall. This ensures that the piston 204 maintains smooth axial sliding and sensitive, precise movement within the cavity over a long period, adapting to the rapid response and high-frequency reciprocating characteristics of electromagnetic braking and guaranteeing millisecond-level braking response accuracy. On the other hand, the O-ring seal also ensures a tight seal inside the cavity. The sealing structure provides protection against environmental moisture, preventing corrosion of internal components and avoiding contamination of the magnetic circuit and moving parts by oil and impurities. This effectively improves the working stability and service life of the electromagnetic braking structure. Furthermore, the simple sealing structure, low frictional resistance, and good return-following performance prevent obstruction of the linear drive of the piston 204 and the reset actions of the first brake pad 103 and the second brake pad 104. It continuously ensures consistency between the brake clamping and reset gaps, effectively avoiding problems such as brake drag, response lag, and brake accuracy deviation caused by seal failure, further enhancing the overall vehicle braking safety and operational reliability.

[0031] The electromagnetic brake rod 203 includes a cylindrical iron core and a conductive coil. The cylindrical iron core is the main body of the magnetic circuit. The conductive coil is wound in multiple turns around the outside of the cylindrical iron core. When the conductive coil is energized, it magnetizes the cylindrical iron core and cooperates with the brake disc made of magnetic material to form a closed magnetic circuit. During operation, the electromagnetic brake lever 203 uses a cylindrical iron core as the core of the magnetic circuit, with multiple turns of conductive coils densely wound around it. When the electronic control assembly 3 outputs braking current to the conductive coil, the coil is energized to generate an induced magnetic field, which quickly magnetizes the internal cylindrical iron core, generating a directional electromagnetic attraction. The magnetized cylindrical iron core couples with the magnetically conductive brake disc to form a complete closed magnetic circuit. Relying on the magnetic attraction, an axial driving force is generated, directly pushing the hollow piston 204 to move axially, thereby causing the first brake pad 103 to press against the brake disc. In conjunction with the caliper structure, the second brake pad 104 clamps the brake disc to complete braking. After the power supply to the coil is cut off, the magnetic field quickly dissipates, the closed magnetic circuit disappears, and the electromagnetic axial driving force is eliminated. The first brake pad 103 and the second brake pad 104 then return to their original positions. The braking is released by returning to its original position under the action of the positioning mechanism. This application adopts a central magnetic circuit structure with a coil covering a cylindrical iron core. The magnetic circuit path is regular and compact, with low magnetic leakage and high magnetic field utilization. Under the same power consumption, it can output a larger axial electromagnetic thrust, providing sufficient braking force to meet the braking needs of different working conditions and higher energy utilization efficiency. By eliminating intermediate mechanical transmission pairs such as rotary motors, the piston 204 is directly driven by electromagnetic attraction, eliminating transmission gaps and mechanical lag. The braking response is rapid, and it can easily achieve rapid braking within 100 milliseconds, which is suitable for the real-time control requirements of high-level autonomous driving active braking and emergency avoidance. The electromagnetic attraction can be linearly controlled by adjusting the coil current through the electronic control assembly 3, achieving continuous and precise adjustment of braking force with high control accuracy, which is convenient for the integration and matching of the whole vehicle's drive-by-wire braking system.

[0032] like Figure 3 As shown, the first brake pad 103 and the second brake pad 104 are both made of non-metallic wear-resistant materials, and the thickness of the first brake pad 103 and the second brake pad 104 is set to 8-12mm. The first brake pad 103 and the second brake pad 104 in this application are made of non-metallic wear-resistant materials, with a stable and moderate coefficient of friction, low noise and vibration tendency during braking, and smooth braking feel. They do not easily generate hard metal shavings during braking, preventing abnormal scratches and scoring of the brake disc, effectively protecting the brake disc surface and extending its service life. They also possess high-temperature resistance and heat fade resistance, with minimal friction performance degradation under continuous high-intensity braking conditions, stable braking performance, and higher driving safety. The thickness of the first brake pad 103 and the second brake pad 104 is limited to 8-12mm. The appropriate range allows for sufficient wear allowance, ensuring that the first brake pad 103 and the second brake pad 104 do not require frequent replacement during their normal service life, thus reducing maintenance frequency and operating costs. However, it also avoids problems such as insufficient internal space for caliper arrangement, insufficient piston stroke, and assembly interference caused by the first brake pad 103 and the second brake pad 104 being too thick. It also avoids the defects caused by the first brake pad 103 and the second brake pad 104 being too thin, such as low strength, brittleness, premature wear alarm, and reduced braking reliability.

[0033] The piston 204 is made of non-magnetic insulating material in one piece. The hollow structure inside the piston 204 is adapted to the shape of the electromagnetic brake rod 203, allowing the electromagnetic brake rod 203 to be inserted and installed. The piston 204 in this application is integrally molded from a non-magnetic insulating material. This avoids the magnetic field generated by the energized electromagnetic brake lever 203 being diverted by the magnetically conductive piston 204, thus preventing eddy current losses, reducing magnetic leakage and heat generation, ensuring that the magnetic circuit is concentrated between the cylindrical iron core and the brake disc, improving the utilization rate of electromagnetic attraction, ensuring stable braking force output, and reducing coil energy consumption and temperature rise. The insulating properties can isolate the induced current generated by the conductive coil, preventing the piston 204 from becoming energized and causing leakage or short circuit risks. It also avoids electromagnetic interference to surrounding sensors and the electronic control assembly 3, improving the electrical safety and control stability of the braking system, and adapting to the matching requirements of brake-by-wire and high-level autonomous driving electronic control. The non-magnetic material will not be attracted and adhered to the surface of the electromagnetic brake lever 203 by electromagnetic force. After the braking power is cut off, the piston 204 returns smoothly with the brake pads, avoiding the problem of incomplete return due to magnetic attraction and brake pad dragging the brake disc, reducing abnormal wear and driving resistance.

[0034] A vehicle includes a vehicle body and the aforementioned automotive electromagnetic brake caliper, the automotive electromagnetic brake caliper being mounted on the vehicle body.

[0035] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An automotive electromagnetic brake caliper, characterized in that: Includes mounting bracket (1), clamp body (2), guide pin (201), electronic control assembly (3), electromagnetic brake lever (203) and piston (204); The clamp body (2) is slidably engaged with the mounting bracket (1) via a guide pin (201); The electronic control assembly (3) is electrically connected to the electromagnetic brake lever (203); One end of the electromagnetic brake rod (203) is fixedly installed in the central cavity of the piston (204), and the other end of the electromagnetic brake rod (203) is fixedly connected to the clamp body (2). The piston (204) is axially slidably connected to the inner cavity of the clamp body (2). The mounting bracket (1) is slidably connected to a first brake pad (103) and a second brake pad (104) that are arranged opposite to each other. One end of the piston (204) is in contact with the first brake pad (103), and the second brake pad (104) is adapted to the outer end of the caliper (2). The mounting bracket (1) is provided with a reset mechanism, which is used to push the first brake pad (103) and the second brake pad (104) to reset and disengage from the brake disc after the brake is released.

2. The automotive electromagnetic brake caliper according to claim 1, characterized in that: The reset mechanism includes two spring plates (105), which are respectively engaged between the mounting bracket (1) and the first brake plate (103), and between the mounting bracket (1) and the second brake plate (104).

3. The automotive electromagnetic brake caliper according to claim 1, characterized in that: The mounting bracket (1) is an aluminum alloy casting component. The surface of the mounting bracket (1) is provided with an anodized wear-resistant protective layer. The mounting bracket (1) is fixedly installed on the vehicle steering knuckle by bolts. The clamp body (2) is set as a U-shaped structure. The electronic control assembly (3) is fixedly connected to the outer wall of the clamp body (2) by the electronic control assembly fixing bolt (301). The clamp body (2) spans above the mounting bracket (1) and is fixedly connected to the mounting bracket (1). A guide pin (201) is fixedly connected to the clamp body (2), and the guide pin (201) is slidably connected to the mounting bracket (1). The clamp body (2) spans above the mounting bracket (1).

4. The automotive electromagnetic brake caliper according to claim 1, characterized in that: The mounting bracket (1) has two symmetrical guide holes (101) and two guide pins (201). The two guide pins (201) are slidably connected to the corresponding guide holes (101) respectively. The outer end of the guide pin (201) is fixedly connected to the clamp body (2) by the guide pin screw (202).

5. An automotive electromagnetic brake caliper according to claim 4, characterized in that: Each of the guide holes (101) is fixedly installed with a guide pin dust cover (102) that is adapted to the guide pin (201) between the outer wall of the guide hole (101) and the clamp body (2). The guide pin dust cover (102) is a component made of elastic material.

6. The automotive electromagnetic brake caliper according to claim 1, characterized in that: The guide pin (201) is a cylindrical pin, and the pin diameter of the guide pin (201) is set to 12-18mm.

7. The automotive electromagnetic brake caliper according to claim 1, characterized in that: An O-ring is fitted between the piston (204) and the piston cavity of the clamp (2), and the O-ring is used to achieve sealing protection of the piston cavity.

8. The automotive electromagnetic brake caliper according to claim 1, characterized in that: The electromagnetic brake rod (203) includes a cylindrical iron core and a conductive coil. The cylindrical iron core is the main body of the magnetic circuit. The conductive coil is wound around the outside of the cylindrical iron core in multiple turns. When the conductive coil is energized, it magnetizes the cylindrical iron core and cooperates with the brake disc made of magnetic material to form a closed magnetic circuit.

9. An automotive electromagnetic brake caliper according to claim 1, characterized in that: The first brake pad (103) and the second brake pad (104) are both made of non-metallic wear-resistant materials, and the thickness of the first brake pad (103) and the second brake pad (104) is set to 8-12mm.

10. An automotive electromagnetic brake caliper according to claim 1, characterized in that: The piston (204) is made of non-magnetic insulating material in one piece. The hollow structure inside the piston (204) is adapted to the shape of the electromagnetic brake rod (203) so that the electromagnetic brake rod (203) can be inserted and installed.

11. A vehicle, characterized in that: The invention includes a vehicle body and an automotive electromagnetic brake caliper as described in any one of claims 1-10, the automotive electromagnetic brake caliper being mounted on the vehicle body.

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