Electromechanical brake structure

Abstract

The present application relates to a kind of electronic mechanical brake structures, including brake disc, solid rotor motor and electromagnet unit, the electromagnet unit is arranged on solid rotor motor, the electromagnet unit is used to provide brake disc with braking force;Brake recess is equipped on the solid rotor motor, stator is equipped in the brake recess, the brake disc is located in brake recess, the stator is symmetrically distributed in the two sides of brake disc, the solid rotor motor is used to provide brake disc with braking force or driving force.Compared with prior art, the present application has simple structure, avoids the overheat of locked-rotor caused by rotating electrical machine, and the advantages such as low price.

Description

Technical Field

[0001] This invention relates to the field of electromechanical braking technology, and in particular to an electromechanical braking structure. Background Technology

[0002] Eddy current phenomenon is caused by electromagnetic induction effect and is usually used in three aspects: induction heating, eddy current detection, and eddy current braking. The advantage of eddy current braking compared with traditional friction braking is that it does not need to contact the brake disc during braking. Therefore, when eddy current braking is used as the main braking method or redundant braking, the wear of the brake disc is significantly reduced.

[0003] EMB typically refers to an electromechanical braking structure driven by a rotating electric motor. It has a fast response and high efficiency, but it suffers from motor stalling and overheating under long-term high-intensity operating conditions. Therefore, minimizing the impact of motor stalling while ensuring braking performance, simplifying the structure, reducing costs, and achieving longitudinal force control of the vehicle are important challenges for the mass production of EMB. To this end, a new EMB structure is proposed. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art, such as motor stall and overheating under long-term high-intensity working conditions, and to provide an electromechanical braking structure.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An electromechanical braking structure includes a brake disc, a solid rotor motor, and an electromagnet unit, wherein the electromagnet unit is mounted on the solid rotor motor and is used to provide braking force to the brake disc.

[0007] The solid rotor motor is provided with a braking groove, and a stator is provided in the braking groove. The brake disc is located in the braking groove, and the stator is symmetrically distributed on both sides of the brake disc. The solid rotor motor is used to provide braking force or driving force to the brake disc.

[0008] Preferably, the solid rotor motor is provided with an electromagnet mounting groove that matches the shape of the electromagnet unit, and the electromagnet unit is slidably disposed in the electromagnet mounting groove.

[0009] Preferably, the solid rotor motor includes a first fixing part and a second fixing part in a fan-shaped annulus, the first fixing part and the second fixing part being symmetrically distributed on both sides of the electromagnet mounting groove.

[0010] Preferably, there are multiple stators, which are located in the first fixing part and the second fixing part, and each stator is symmetrically distributed on both sides of the electromagnet mounting slot.

[0011] Preferably, the solid rotor motor is further provided with a solid rotor motor heat dissipation groove, the motor heat dissipation groove is connected to the brake groove, and the motor heat dissipation groove is located on the outside of the stator.

[0012] Preferably, there are multiple solid rotor motor heat dissipation slots, and each solid rotor motor heat dissipation slot is symmetrically distributed on both sides of the electromagnet mounting slot.

[0013] Preferably, the electromagnet unit includes a fixed housing and an electromagnet, a first brake pad, and a second brake pad fixed on the fixed housing;

[0014] The fixed housing is mounted on the solid rotor motor. The fixed housing has a brake groove corresponding to the brake recess. The brake disc, the first brake pad, and the second brake pad are located in the brake groove. The electromagnet is located between the first brake pad and the fixed housing and is used to drive the first brake pad to move. The first brake pad and the second brake pad are symmetrically arranged on both sides of the brake disc.

[0015] Preferably, the electromagnet unit further includes a spring, one end of which is connected to a first brake pad and the other end of which is connected to a fixed housing.

[0016] Preferably, there are multiple springs, and each spring is symmetrically distributed on both sides of the electromagnet.

[0017] Preferably, the fixed housing is provided with an electromagnet heat dissipation groove, the electromagnet heat dissipation groove and the brake slot are located at opposite ends of the fixed housing, and the electromagnet heat dissipation groove is connected to the brake slot.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) This scheme provides a magnetic field by setting a stator connected to a power supply in the brake groove of a solid rotor motor. When the brake disc rotates in the brake groove, an eddy current effect is generated on the brake disc, thereby generating a braking force or driving force along the circumference of the brake disc. At the same time, the electromagnet unit provides auxiliary braking force to the brake pads by switching the power on and off, thus achieving the braking effect.

[0020] By using a solid rotor motor and an electromagnet unit in combination for braking, the motor avoids prolonged high-intensity operation, structurally avoids the stall and overheating problems caused by rotating motors, and reduces wear on the brake disc.

[0021] (2) In the traditional EMB structure, permanent magnet synchronous motors are widely used, but they also have obvious problems: complex adjustment, significant influence from temperature and magnetic field, high cost, and potential demagnetization during long-term operation, leading to decreased braking performance or failure. In this solution, the stator of the solid rotor motor is connected to the power supply to provide a magnetic field for the brake disc. The rotation of the brake disc cuts the magnetic field lines, generating eddy currents. Utilizing the eddy current phenomenon, the brake disc replaces the permanent magnet rotor, simplifying the overall structure. It will not demagnetize even after long-term use, resulting in a longer service life and higher reliability. Moreover, it is cheaper than permanent magnets.

[0022] (3) In this scheme, the solid rotor motor and the electromagnet unit can work together to provide torque in different directions for the structure to be braked, making it easier to control the distribution of wheel-side torque, improve the flexibility of the braking structure and the dynamic performance of the vehicle. At the same time, the solid rotor motor and the electromagnet unit can work independently, and the two serve as backups for each other, improving the reliability of the braking structure. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the electromechanical braking structure of the present invention;

[0024] Figure 2 This is a first-view structural schematic diagram of the solid rotor motor in this invention;

[0025] Figure 3 This is a schematic diagram of the solid rotor motor in this invention from a second perspective.

[0026] Figure 4 This is a first-view structural schematic diagram of the electromagnet unit in this invention;

[0027] Figure 5 This is a schematic diagram of the electromagnet unit from a second perspective in this invention;

[0028] In the diagram: 1. Brake disc; 2. Solid rotor motor; 3. Electromagnet device; 20. Brake groove; 21. Electromagnet device mounting groove; 22. Solid rotor motor heat dissipation groove; 23. Stator; 24. First fixing part; 25. Second fixing part; 30. Brake slot; 31. Electromagnet device heat dissipation groove; 32. Spring; 33. Electromagnet; 34. Brake pad 1; 35. Second brake pad; 36. Fixed housing. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar labels 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.

[0032] In the description of this invention, 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, or the orientation or positional relationship in which the product of this invention is usually placed during use. They are only for the convenience of describing this invention 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, they should not be construed as limitations on this invention.

[0033] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] Example 1

[0036] like Figure 1 and Figure 3As shown, this embodiment provides an electromechanical braking structure, including a brake disc 1, a solid rotor motor 2, and an electromagnet unit 3. The electromagnet unit 3 is mounted on the solid rotor motor 2 and is used to provide braking force to the brake disc.

[0037] The solid rotor motor 2 is provided with a braking groove 20, and a stator 23 is provided in the braking groove 20. The brake disc 1 is located in the braking groove 20, and the stator 23 is symmetrically distributed on both sides of the brake disc 1. The solid rotor motor 2 is used to provide braking force or driving force to the brake disc 1.

[0038] Working principle: The stator 2 is set in the brake groove 20 of the solid rotor motor 2 and connected to the power supply to provide a magnetic field. When the brake disc 1 rotates in the brake groove 20, the eddy current effect is generated on the brake disc 1, thereby generating a braking force or driving force along the circumference of the brake disc 1. At the same time, the electromagnet unit 3 provides auxiliary braking force to the brake pad 1 by switching the power on and off, so as to realize the braking effect.

[0039] This scheme provides a magnetic field by setting a stator 2 connected to a power source in the brake groove 20 of the solid rotor motor 2. When the brake disc 1 rotates in the brake groove 20, an eddy current effect is generated on the brake disc 1, thereby generating a braking force or driving force along the circumference of the brake disc 1. At the same time, the electromagnet unit 3 provides auxiliary braking force to the brake pad 1 by switching the power on and off, thereby achieving the braking effect.

[0040] By using a solid rotor motor 2 and an electromagnet unit 3 in combination for braking, the motor is protected from prolonged high-intensity operation. Structurally, this avoids the stalling and overheating problems associated with rotating motors and reduces wear on the brake disc.

[0041] Preferred implementation methods, such as Figure 2 As shown, the solid rotor motor 2 is provided with an electromagnet mounting groove 21 that matches the shape of the electromagnet unit 3. The electromagnet unit 3 is slidably disposed in the electromagnet mounting groove 21. The electromagnet unit 3 moves along the electromagnet mounting groove 21, which serves to limit the movement of the electromagnet unit 3. The structure is simple and reliable.

[0042] Furthermore, the solid rotor motor 2 includes a fan-shaped annular first fixing part 24 and a second fixing part 25, which are symmetrically distributed on both sides of the electromagnet mounting slot 21. There are multiple stators 23, located within the first fixing part 24 and the second fixing part 25, with each stator 23 symmetrically distributed on both sides of the electromagnet mounting slot 21.

[0043] In a solid rotor motor, the stator is connected to the power supply and provides a magnetic field to the brake disc. The rotation of the brake disc cuts the magnetic field lines and generates eddy currents. By utilizing the eddy current phenomenon, the brake disc replaces the permanent magnet rotor, making the overall structure simple. It will not demagnetize even after long-term use, has a longer service life and higher reliability, and is also cheaper than permanent magnets.

[0044] In a preferred embodiment, the solid rotor motor 2 is further provided with a solid rotor motor heat dissipation slot 2, which is connected to the brake groove 20 and is located on the outside of the stator 23. There are multiple solid rotor motor heat dissipation slots 2, and each solid rotor motor heat dissipation slot 2 is symmetrically distributed on both sides of the electromagnet mounting groove 21.

[0045] In the solid rotor motor 2, the stator 23 generates a magnetic field when energized, and the brake disc 1 generates heat during the operation of cutting the magnetic field lines. By setting the solid rotor motor heat dissipation groove 2 on the outside of the stator 23, the structure can be cooled, the temperature can be reduced, the operational reliability can be improved, and the weight of the solid rotor motor 2 can be reduced, making it easier to install and disassemble.

[0046] Preferred implementation methods, such as Figure 4 and Figure 5 As shown, the electromagnet unit 3 includes a fixed housing 36 and an electromagnet 33, a first brake pad 34 and a second brake pad 35 fixed on the fixed housing 36.

[0047] The fixed housing 36 is mounted on the solid rotor motor 2. The fixed housing 36 is provided with a brake groove 30 corresponding to the brake groove 20. The brake disc 1, the first brake pad 34 and the second brake pad 35 are located in the brake groove 30. The electromagnet 33 is located between the first brake pad 34 and the fixed housing 36 and is used to drive the first brake pad 34 to move. The first brake pad 34 and the second brake pad 35 are symmetrically arranged on both sides of the brake disc 1.

[0048] Furthermore, the electromagnet unit 3 also includes a spring 32, one end of which is connected to the first brake pad 34, and the other end is connected to the fixed housing 36. There are multiple springs 32, and each spring 32 is symmetrically distributed on both sides of the electromagnet 33.

[0049] Furthermore, the fixed housing 36 is provided with an electromagnet heat dissipation groove 31, which is located at opposite ends of the fixed housing 36 and is connected to the brake groove 30.

[0050] When the electromagnet unit 3 brakes, the electromagnet 33 generates a repulsive force, pushing the first brake pad 34 towards the brake disc 1, causing it to press against the brake disc 1. The reaction force generated by the first brake pad 34 on the electromagnet 33 causes it to move the fixed housing 36 to the opposite direction. The fixed housing 36 then moves the second brake pad 35. The first brake pad 34 and the second brake pad 35 move towards the brake disc 1 simultaneously, pressing against the brake disc 1 and generating braking force.

[0051] Optionally, the electromagnet unit 3 and the solid rotor motor 2 are controlled and torque-distributed through a motor controller. The solid rotor motor and the electromagnet unit can work together to provide torque in different directions to the structure to be braked, making it easier to control the distribution of torque on the wheel side and improving the flexibility of the braking structure. At the same time, the solid rotor motor and the electromagnet unit can work independently, serving as backups for each other and improving the reliability of the braking structure.

[0052] In conjunction with the preferred embodiments described above, this embodiment provides a more specific implementation method:

[0053] The EMB structure includes a brake disc 1, a solid rotor motor 2, an electromagnet unit 3, an electromagnet device mounting slot 21, a solid rotor motor heat dissipation slot 22, a stator 23, an electromagnet device heat dissipation slot 31, a spring 32, an electromagnet 33, a first brake pad 34, a second brake pad 35, and a fixed housing 36.

[0054] Furthermore, the electromagnet unit 3 is installed on the electromagnet device mounting slot 21, and can slide on the solid rotor motor 2 when braking. The solid rotor motor 2 has a stator 23 inside, which is symmetrical on both sides, with 6 stator cores on each side. The electromagnet 33 and the second brake pad 35 are installed on the fixed housing 36, and the spring 32 is installed between the first brake pad 34 and the plane of the fixed housing 36.

[0055] Furthermore, the solid rotor motor 2 has two slots: an electromagnet device mounting slot 21 and a solid rotor motor heat dissipation slot 22. The former is used for the installation and movement limit of the electromagnet unit 3, and the latter is used for weight reduction and ventilation. The solid rotor motor 2 has four sets of stators 23 inside, with 6 in each set, arranged in pairs and symmetrically on the left and right. The windings are omitted for structural demonstration. During operation, the direction of the generated magnetic field is determined by the three-phase current flowing through the windings, thereby generating an induced current on the brake disc, cutting the magnetic field lines to generate a force along the circumference of the brake disc, thus achieving driving or braking.

[0056] Furthermore, the electromagnet unit 3 is composed of a spring 32, an electromagnet 33, a first brake pad 34, a second brake pad 35, and a fixed housing 36; the spring 32 is installed on both sides of the electromagnet 33, and the two ends of the spring 32 are respectively connected to the fixed housing 36 and the first brake pad 34, providing a pulling force to pull the first brake pad 34 toward the electromagnet 33;

[0057] The second brake pad 35 is mounted on the fixed housing 36 and moves with the housing, similar to a floating caliper. When braking, the electromagnet 33 generates a repulsive force, pushing the first brake pad 34 away from the brake disc and pressing it. The reaction force causes the second brake pad 35 on the other side to move with the housing and press the other side of the brake disc, generating braking force.

[0058] The EMB structure covers a 180° sector of the brake disc, and a solid rotor motor with double-sided six-tooth stator windings on both sides provides a magnetic field, generating eddy currents on the brake disc to produce braking or driving force. A floating electromagnet braking device is slidably connected in the middle of the structure, which brakes when energized and releases when de-energized.

[0059] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. An electromechanical braking structure, characterized in that, It includes a brake disc (1), a solid rotor motor (2) and an electromagnet unit (3), wherein the electromagnet unit (3) is mounted on the solid rotor motor (2) and is used to provide braking force to the brake disc; The solid rotor motor (2) is provided with a braking groove (20), and a stator (23) is provided in the braking groove (20). The brake disc (1) is located in the braking groove (20), and the stator (23) is symmetrically distributed on both sides of the brake disc (1). The solid rotor motor (2) is used to provide braking force or driving force to the brake disc (1). The solid rotor motor (2) is provided with an electromagnet mounting groove (21) that matches the shape of the electromagnet unit (3), and the electromagnet unit (3) is slidably disposed in the electromagnet mounting groove (21). The solid rotor motor (2) includes a first fixing part (24) and a second fixing part (25) in a fan-shaped shape, which are symmetrically distributed on both sides of the electromagnet mounting groove (21).

2. The electromechanical braking structure according to claim 1, characterized in that, The number of stators (23) is multiple. The stators (23) are located in the first fixing part (24) and the second fixing part (25). Each stator (23) is symmetrically distributed on both sides of the electromagnet mounting slot (21).

3. The electromechanical braking structure according to claim 1, characterized in that, The solid rotor motor (2) is also provided with a solid rotor motor heat dissipation groove (2), which is connected to the brake groove (20) and is located on the outside of the stator (23).

4. The electromechanical braking structure according to claim 3, characterized in that, The number of solid rotor motor heat dissipation slots (2) is multiple, and each solid rotor motor heat dissipation slot (2) is symmetrically distributed on both sides of the electromagnet mounting slot (21).

5. The electromechanical braking structure according to claim 1, characterized in that, The electromagnet unit (3) includes a fixed housing (36) and an electromagnet (33), a first brake pad (34) and a second brake pad (35) fixed on the fixed housing (36). The fixed housing (36) is mounted on the solid rotor motor (2). The fixed housing (36) is provided with a brake groove (30) corresponding to the brake groove (20). The brake disc (1), the first brake pad (34) and the second brake pad (35) are located in the brake groove (30). The electromagnet (33) is located between the first brake pad (34) and the fixed housing (36) and is used to drive the first brake pad (34) to move. The first brake pad (34) and the second brake pad (35) are symmetrically arranged on both sides of the brake disc (1).

6. The electromechanical braking structure according to claim 5, characterized in that, The electromagnet unit (3) also includes a spring (32), one end of which is connected to the first brake pad (34), and the other end is connected to the fixed housing (36).

7. The electromechanical braking structure according to claim 6, characterized in that, There are multiple springs (32), and each spring (32) is symmetrically distributed on both sides of the electromagnet (33).

8. The electromechanical braking structure according to claim 5, characterized in that, The fixed housing (36) is provided with an electromagnet heat dissipation groove (31), which is located at opposite ends of the fixed housing (36) and the brake slot (30). The electromagnet heat dissipation groove (31) is connected to the brake slot (30).

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