Automobile brake caliper capable of reducing friction noise

Abstract

The utility model relates to the technical field of automobile brake calipers, and discloses an automobile brake caliper capable of reducing friction noise, which comprises a brake disc and a brake caliper body composed of pistons and brake pads, the number of the pistons is even, the pistons are arranged in the brake caliper body in pairs, and the pistons are controlled by a hydraulic oil circuit and can drive the brake pads to move. An electromagnetic generator is arranged between the piston and the brake pad, the electromagnetic generator can generate a magnetic field after being powered on, the electromagnetic generator is connected with an electronic oscillator and can change the direction of the magnetic field, and a ferromagnetic layer made of materials capable of being attracted by magnets is arranged in the middle of the brake disc. The ferromagnetic layer is located within the influence range of the magnetic field of the electromagnetic generator, electrons in the ferromagnetic layer are influenced by the magnetic field in the changing direction and are continuously rearranged to generate heat, the brake disc is preheated, stress is uniform in the braking process, and gaps are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brake calipers, in particular to an automobile brake caliper which can reduce friction noise. Background Art

[0002] Fixed brake calipers, also known as opposed calipers or multi-piston calipers, are mainly characterized by the layout of the same number and size of pistons at the same position on both sides of the brake disc. When the brake fluid is evenly distributed to the pistons on both sides through the pipes on the caliper, the pistons will push the brake pads to tighten the brake disc, thereby achieving immediate braking effect. Since the caliper body is fixed and will not produce left and right displacement, it is called a fixed caliper.

[0003] When the car is cold-started, due to the low temperature, the rubber parts of the chassis suspension are relatively hard and may work together with the frame to cause the brake caliper or suspension system to vibrate and generate low-frequency noise. At the same time, abnormal noise caused by loose brake calipers or excessive gap between the fixing pin and the pin sleeve of the brake caliper may also cause noise when shaking. The necessity of calipers to reduce noise cannot be ignored. Noise not only affects the driver's comfort and safety, but may also cause potential damage to vehicle components and shorten their service life. Therefore, in order to improve the driving experience, protect the vehicle and extend its service life, it is particularly important to reduce caliper noise. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the utility model provides an automobile brake caliper with reduced friction noise, which has the advantage of low noise during braking and solves the problem of noise generated by the brake caliper during braking.

[0006] (II) Technical solution

[0007] In order to achieve the purpose of low noise during the above-mentioned braking process, the utility model provides the following technical solutions: an automobile brake caliper for reducing friction noise, comprising a brake disc, a brake caliper body composed of a piston and a brake pad, wherein the pistons are provided in an even number and are arranged in pairs in the brake caliper body, the pistons are controlled by a hydraulic oil circuit, can drive the brake pads to move, and contact the brake disc for braking, an electromagnetic generator is provided between the piston and the brake pad, the electromagnetic generator can generate a magnetic field after being energized, and the electromagnetic generator is connected to an electronic oscillator to change the direction of the magnetic field, a ferromagnetic layer made of a material that can be adsorbed by a magnet is provided in the middle of the brake disc, and the ferromagnetic layer is within the influence range of the magnetic field of the electromagnetic generator.

[0008] Preferably, an air flow nozzle is provided inside the brake caliper body and above the brake disc, and the air flow ejected by the air flow nozzle is perpendicular to the tangent line of the edge of the brake disc.

[0009] Preferably, the ferromagnetic layer is a cylinder array surrounding the axis of the brake disc.

[0010] Preferably, arc-shaped depressions are arranged in an array around the axis of the brake disc on both sides of the brake disc.

[0011] Preferably, the arc-shaped recess is provided with a heat-conducting strip.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides an automobile brake caliper that reduces friction noise and has the following beneficial effects:

[0014] 1. The automobile brake caliper for reducing friction noise works by an electromagnetic generator to generate a magnetic field, and the electromagnetic generator is connected to an electronic oscillator so that the direction of the magnetic field can change according to the frequency, and the electrons in the ferromagnetic layer in the middle of the brake disc will be disturbed by the magnetic field generated by the electromagnetic generator. In order to stabilize their own state and move, the electrons inside the ferromagnetic layer are in a free state when not affected by the magnetic field, and when there is a magnetic field, the internal electrons will align with the magnetic field, and the disappearance or change of direction of the magnetic field will also affect the direction of the electrons inside the ferromagnetic layer, causing the arrangement to change. The direction of the magnetic field is changed according to the frequency by the electronic oscillator, and the electrons will also change direction continuously. Friction and heat will be generated between the different movements of the electrons, and the heat on the ferromagnetic layer will be transferred to the brake disc to preheat it. The preheated brake disc and brake The temperature of the pad surface rises, which increases the friction coefficient between the materials, which helps to provide faster and more stable braking force during braking, thereby shortening the braking distance and improving driving safety. Preheating can make the contact between the brake disc and the brake pad more uniform and reduce the noise caused by poor contact or small vibrations. In addition, preheating can also evaporate the moisture and impurities in the brake pad material, further reducing the noise generated during braking. During the preheating process, the materials of the brake pad and brake disc will experience a certain amount of thermal expansion, making the fit between the two closer. This fit helps to improve the friction consistency between the brake pad and the brake disc, making the braking process smoother. The preheated brake pad material is softer and the friction with the brake disc is more uniform, which helps to reduce the wear of the brake pad. In addition, preheating can also change the microstructure of the brake pad surface and improve its wear resistance.

[0015] 2. The automobile brake caliper for reducing friction noise has a ferromagnetic layer which is a cylinder array surrounding the axis of the brake disc. The airflow ejected from the upper airflow nozzle passes through the cylinder. Due to the interaction between the fluid and the object, double-row line vortices with opposite rotation directions and regular arrangement are periodically shed on both sides of the object. The heat generated on the ferromagnetic layer is carried by this vortex-like airflow, and the heat is volatilized. The vortex contacts other positions of the brake disc, so that the brake disc is evenly heated, and the overall preheating of the brake disc is accelerated to avoid that only part of the brake disc is heated up during braking, resulting in uneven force during friction braking, which increases noise. Since the vortex street changes the direction and speed of air flow, this may help to increase the air flow on the surface of the brake disc and improve the heat dissipation efficiency. However, this effect is relatively small because the main way to dissipate heat from the brake disc is to transfer the heat generated during braking to the wheel hub, which is then dissipated into the air by the wheel hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model;

[0018] Figure 3 This is a schematic diagram of gas flow in the ferromagnetic layer of the utility model.

[0019] In the figure: 1, brake disc; 2, brake caliper body; 11, ferromagnetic layer; 21, piston; 23, air flow nozzle; 211, brake pad; 212, electromagnetic generator. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 2, a car brake caliper for reducing friction noise, comprises a brake disc 1, a brake caliper body 2 consisting of a piston 21 and a brake pad 211, wherein an even number of the pistons 21 are arranged in pairs in the brake caliper body 2, the pistons 21 are controlled by a hydraulic oil circuit, and can drive the brake pad 211 to move and contact the brake disc 1 for braking, an electromagnetic generator 212 is arranged between the piston 21 and the brake pad 211, the electromagnetic generator 212 can generate a magnetic field after being energized, and the electromagnetic generator 212 is connected to an electronic oscillator to change the direction of the magnetic field, a ferromagnetic layer 11 made of a material that can be adsorbed by a magnet is arranged in the middle of the brake disc 1, and the ferromagnetic layer 11 is within the influence range of the magnetic field of the electromagnetic generator 212.

[0022] Furthermore, when the user steps on the brake pedal, the piston 21 works, and the brake pad 211 is pushed out by hydraulic drive. At the same time, the electromagnetic generator 212 between the brake pad 211 and the piston 21 works to generate a magnetic field, and the electromagnetic generator 212 is connected to the electronic oscillator, so that the direction of the magnetic field can change according to the frequency, and the electrons in the ferromagnetic layer 11 in the middle of the brake disc 1 will be disturbed by the magnetic field generated by the electromagnetic generator 212. In order to stabilize its own state and move, the electrons inside the ferromagnetic layer 11 are in a free state when not affected by the magnetic field, and when there is a magnetic field, the internal electrons will align with the magnetic field, and the disappearance or change of direction of the magnetic field will also affect the direction of the electrons in the ferromagnetic layer 11, causing its arrangement to change. The direction of the magnetic field is changed according to the frequency by the electronic oscillator, and the electrons will also change direction continuously. Friction and heat will be generated between the different movements of the electrons. The heat on the ferromagnetic layer 11 is transferred to the brake disc 1, so that it is preheated and generates thermal expansion, so that when the brake disc 1 and the brake pad 11 are frictionally braked, the contact between the brake disc 1 and the brake pad 211 is more uniform.

[0023] An airflow nozzle 23 is provided inside the brake caliper body 2 and above the brake disc 1. The airflow ejected by the airflow nozzle 23 is perpendicular to the tangent of the edge of the brake disc 1. When the brake disc 1 generates a large amount of heat during braking, the airflow ejected by the airflow nozzle 23 can directly act on the tangent of the edge of the brake disc 1 to quickly take away the heat. This cooling method can effectively reduce the temperature of the brake disc 1 and prevent the occurrence of thermal decay, thereby maintaining the stability of the braking performance. When the airflow ejected by the airflow nozzle 23 hits the surface of the brake disc 1, a certain airflow pressure will be formed, which helps to reduce the noise generated during braking. At the same time, it can remove foreign matter on the surface of the brake disc 1, such as pebbles or water films, which will generate abnormal noise during braking, and can reduce the wear of the brake pad 211 and the surface of the brake disc 1, thereby increasing the service life.

[0024] See also Figure 3The ferromagnetic layer 11 is a cylinder arrayed around the axis of the brake disc 1. The airflow ejected by the airflow nozzle 23 above passes through the cylinder. Due to the interaction between the fluid and the object, double-row line vortices with opposite rotation directions and regular arrangement will be periodically shed on both sides of the object. The heat generated on the ferromagnetic layer 11 is carried by this vortex-like airflow, and the heat is volatilized. The vortex contacts other positions of the brake disc 1, so that the brake disc 1 is evenly heated, and the overall preheating of the brake disc 1 is accelerated to avoid that only part of the brake disc 1 is heated up during braking, resulting in uneven force during friction braking, which increases noise. Since the vortex street changes the direction and speed of air flow, this may help to increase the air flow on the surface of the brake disc 1 and improve the heat dissipation efficiency. However, this effect is relatively small, because the main heat dissipation method of the brake disc 1 is to transfer the heat generated during braking to the wheel hub, and then dissipate it into the air by the wheel hub.

[0025] The brake disc 1 is provided with arc-shaped depressions in an array around the axis of the brake disc 1 on both sides. The presence of the depressions allows foreign objects to be brought into the depressions during braking when there is a foreign object directly between the brake pad 211 and the brake disc 1, thereby avoiding long-term friction between the brake disc 1 and the brake pad 211, reducing the wear caused by the presence of foreign objects between the brake disc 1 and the brake pad 211, and increasing the heat dissipation area of ​​the brake disc 1, thereby preventing the heat generated during braking friction from being difficult to volatilize. At the same time, the channel for gas flow is increased, which speeds up the air flow to take away the heat on the brake disc, and the depression is in an arc shape, so that foreign objects can be quickly thrown out in the depression due to the centrifugal force generated by the rotation of the brake disc 1.

[0026] The arc-shaped depression is provided with a heat-conducting strip. The brake disc 1 will generate a large amount of heat during the braking process, and this heat needs to be dissipated quickly to prevent thermal decay. The heat-conducting strip improves the heat dissipation efficiency and maintains the stability of the braking performance, which helps to reduce vibration and noise during braking and improve the comfort and stability of braking.

[0027] Working principle: When the user steps on the brake pedal, the piston 21 works and pushes the brake pad 211 out through hydraulic drive. At the same time, the electromagnetic generator 212 between the brake pad 211 and the piston 21 works to generate a magnetic field, and the electromagnetic generator 212 is connected to the electronic oscillator, so that the direction of the magnetic field can change according to the frequency, and the electrons in the ferromagnetic layer 11 in the middle of the brake disc 1 will be disturbed by the magnetic field generated by the electromagnetic generator 212. In order to stabilize their own state and generate movement, the electrons inside the ferromagnetic layer 11 are in a free state when not affected by the magnetic field, and when there is a magnetic field, the internal electrons will align with the magnetic field, and the disappearance or change of direction of the magnetic field will also affect the direction of the electrons inside the ferromagnetic layer 11. The ferromagnetic layer 11 is used to generate heat and the heat on the ferromagnetic layer 11 is transferred to the brake disc 1 to preheat it and generate thermal expansion. When the brake disc 1 and the brake pad 11 are frictionally braked, the contact between the brake disc 1 and the brake pad 211 is more uniform, reducing the noise caused by poor contact or small vibrations. When the car is just started or at low temperatures, there are gaps in some shaft connections, or the elastic parts are relatively hard. Preheating during braking can effectively increase the elasticity of the elastic parts and reduce the gaps in the shaft connections, thereby reducing the noise generated during braking.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vehicle brake caliper for reducing friction noise, comprising a brake disc (1), a brake caliper body (2) consisting of a piston (21) and a brake pad (211), characterized in that: The pistons (21) are provided in an even number and are arranged in pairs in the brake caliper body (2). The pistons (21) are controlled by a hydraulic oil circuit and can drive the brake pads (211) to move and contact the brake disc (1) for braking. An electromagnetic generator (212) is provided between the pistons (21) and the brake pads (211). The electromagnetic generator (212) can generate a magnetic field after being energized, and the electromagnetic generator (212) is connected to an electronic oscillator to change the direction of the magnetic field. A ferromagnetic layer (11) made of a material that can be adsorbed by a magnet is provided in the middle of the brake disc (1). The ferromagnetic layer (11) is within the influence range of the magnetic field of the electromagnetic generator (212).

2. The automobile brake caliper for reducing friction noise according to claim 1, characterized in that: An airflow nozzle (23) is provided inside the brake caliper body (2) and above the brake disc (1), and the airflow ejected by the airflow nozzle (23) is perpendicular to the tangent line of the edge of the brake disc (1).

3. The automobile brake caliper for reducing friction noise according to claim 2, characterized in that: The ferromagnetic layer (11) is a cylinder array surrounding the axis of the brake disc (1).

4. The automobile brake caliper for reducing friction noise according to claim 1, characterized in that: Arc-shaped depressions are arranged in an array around the axis of the brake disc (1) on both sides.

5. The automobile brake caliper for reducing friction noise according to claim 4, characterized in that: The arc-shaped recess is provided with a heat-conducting strip.

Images