Brake and motor

Abstract

The application provides a kind of brake and motor.The brake includes core, rotating part (2) and locking structure, locking structure is arranged in core, the side of rotating part (2) towards core is provided with first limit slot (21), locking structure includes locking part (31), core can drive locking part (31) to extend from core or be retracted into core, when brake is in braking state, locking part (31) extends from core and is clamped in first limit slot (21) to limit rotating part (2) circumferentially, when brake is in braking release state, locking part (31) is retracted into core from first limit slot (21).The brake and motor provided by the application can solve the problem that the existing brake is easily forced to rotate and damaged under strong external force impact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor braking, in particular to a brake and a motor. BACKGROUND

[0002] Motor brakes play a core role in many fields such as industrial automation, elevator control, crane operation, logistics transportation, etc. Especially in industrial robots, the brake is needed to achieve instant stop and accurate positioning of the robot joint movement. The brake provides instant and accurate stop control for the motor, which not only significantly enhances the safety and reliability of the equipment operation, but also greatly improves the performance and production efficiency of the equipment. Therefore, the brake is an indispensable key component in modern electromechanical equipment.

[0003] The current brake mainly relies on the friction between the brake armature and the friction plate to achieve the braking of the motor shaft. However, when the motor is stopped, if the device driven by the motor is suddenly subjected to a sudden increase in load or external force impact, the external force acting on the motor shaft will greatly exceed the static friction between the armature and the friction plate. The external force will drive the motor shaft to rotate forcibly, which can easily cause the friction plate to break and damage the brake, thereby greatly reducing the reliability and service life of the brake. SUMMARY

[0004] The main purpose of the present application is to provide a brake that can solve the problem of easy forced rotation and brake damage under the condition of strong external force impact.

[0005] In order to achieve the above purpose, according to one aspect of the present application, a brake is provided, which comprises an iron core, a rotating part and a locking structure, the locking structure is arranged in the iron core, the rotating part is provided with a first limiting groove on one side facing the iron core, the locking structure comprises a locking part, the iron core can drive the locking part to extend out of the iron core or retract into the iron core, when the brake is in a braking state, the locking part extends out of the iron core and is clamped in the first limiting groove to limit the rotating part in the circumferential direction, when the brake is in a braking release state, the locking part is retracted into the iron core from the first limiting groove.

[0006] Further, the iron core comprises a stator and a rotor, the rotor is provided with a first mounting groove, the locking part is arranged in the first mounting groove, the locking structure further comprises a connecting piece, one end of the connecting piece is connected with the locking part, and the other end is connected with the stator, the locking part is a lever structure, when the brake is in a braking state, the connecting piece pulls the first end of the locking part to move in the direction of the stator, the second end of the locking part moves in the direction of the rotor under the action of the lever and extends into the first limiting groove to limit the rotating part in the circumferential direction.

[0007] Further, the stator is provided with a second mounting slot, one end of the connecting piece is connected with the locking part, and the other end is arranged in the second mounting slot.

[0008] Further, the connecting piece comprises a connecting rod or a first elastic piece.

[0009] Further, the surface of the moving part towards the rotating part is provided with a communication slot, the second end of the locking part passes through the communication slot to abut and limit the first limiting slot.

[0010] Further, the locking part is arranged in the first mounting slot in a rotating manner, the locking part comprises a first rotating section and a second rotating section, the first end of the first rotating section is connected with the first elastic piece, the second end of the first rotating section is connected with the first end of the second rotating section, and the second end of the second rotating section is abutted in the first limiting slot.

[0011] Further, the locking part further comprises a third rotating section, the first end of the third rotating section is connected with the second end of the second rotating section, and the second end of the third rotating section is abutted in the first limiting slot, when the brake is in the brake release state, the first rotating section extends along the horizontal direction, the second rotating section extends away from the first rotating section, and the third rotating section extends away from the first rotating section and the second rotating section.

[0012] Further, one side of the rotating part towards the core is provided with a friction plate, and the moving part is provided with a pressing part, when the brake is in the braking state, the pressing part is in contact with the friction plate.

[0013] Further, the thickness of the locking part is smaller than the width of the first limiting slot.

[0014] Further, one side of the rotating part towards the core is provided with a friction plate, the center of the moving part is provided with a shaft hole, and a plurality of first limiting slots are arranged in a circumferential direction on the surface between the friction plate and the shaft hole.

[0015] Further, the core comprises a stator, a moving part and a second elastic piece, the stator and the moving part have an activity gap, and when the brake is in the braking state, the second elastic piece can push the moving part to contact and brake the rotating part in the activity gap.

[0016] Further, the core comprises a stator and a moving part, the moving part is provided with a second limiting slot, and the stator is provided with a limiting part which is inserted in the second limiting slot.

[0017] Further, the brake further comprises a rotating shaft, and the rotating part and the core are sleeved on the rotating shaft.

[0018] Further, the brake comprises a first elastic piece, a second elastic piece and a limiting part, and a plurality of first elastic pieces, a plurality of second elastic pieces and a plurality of limiting parts are arranged in a circumferential direction on the outer periphery of the stator.

[0019] Further, the iron core comprises a stator and a rotor, the first mounting slot is arranged in the rotor, the locking part is arranged in the first mounting slot, the locking structure further comprises an electromagnetic control unit, the electromagnetic control unit is arranged in the first limiting slot, and when the brake is in the braking state, the electromagnetic control unit can make the locking part extend into the first limiting slot to limit the rotation part in the circumferential direction through the magnetic force after the rotation part stops rotating.

[0020] According to another aspect of the present application, a motor is provided, comprising the brake.

[0021] The iron core is used for bearing the locking structure and can drive the locking part to extend and retract. The rotation part generally refers to the hub part connected with the rotating shaft of the motor, and the rotation part rotates with the rotating shaft of the motor. The locking part is matched with the first limiting slot to physically clamp and limit the rotation part, preventing the rotation part from rotating. The brake provided by the present application can make the locking part extend from the iron core and clamp into the first limiting slot on the rotation part after the rotation part stops, so that the rotation part is kept in the locked state, avoiding the situation that the rotating shaft of the motor is forced to rotate after being suddenly subjected to a large load or external force impact, resulting in the fragmentation of the friction plate and the damage and failure of the brake, thereby improving the reliability and service life of the brake. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description, explain the application. The present application will be described and explained with reference to the drawings thereof, and specific embodiments thereof, and there is no intent to unnecessarily limit the application to such described embodiments. In the drawings:

[0023] Figure 1 An exploded view of the brake of the embodiment of the present application is shown;

[0024] Figure 2 A schematic view of the overall structure of the rotation part of the brake of the embodiment of the present application is shown;

[0025] Figure 3 A front view of the rotation part of the brake of the embodiment of the present application is shown;

[0026] Figure 4 A schematic view of the overall structure of the stator of the brake of the embodiment of the present application is shown;

[0027] Figure 5 A sectional view of the brake in the locked state of the embodiment of the present application is shown;

[0028] Figure 6 A sectional view of the brake in the unlocked state of the embodiment of the present application is shown;

[0029] Figure 7Fig. 1 shows a schematic diagram of the overall structure of the locking portion of the brake of the embodiment of the present application;

[0030] Figure 8 Fig. 2 shows a sectional view of the rotating portion of the brake of the embodiment of the present application;

[0031] Figure 9 Fig. 3 shows a sectional view of the stator of the brake of the embodiment of the present application;

[0032] Figure 10 Fig. 4 shows a sectional view of the rotor of the brake of the embodiment of the present application in the locked state; and

[0033] Figure 11 Fig. 5 shows a sectional view of the rotor of the brake of the embodiment of the present application in the unlocked state.

[0034] In the above drawings, the following reference signs are used:

[0035] 11, stator; 111, second mounting groove; 112, stator winding; 113, limiting portion; 114, third mounting groove; 12, rotor; 121, first mounting groove; 122, pressing portion; 123, second limiting groove; 124, communication groove; 2, rotating portion; 21, first limiting groove; 22, friction plate; 31, locking portion; 311, first rotating section; 312, second rotating section; 313, third rotating section; 32, first elastic member; 4, second elastic member; 5, rotating shaft; 6, movable clearance. DETAILED DESCRIPTION

[0036] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0037] For reference Figures 1 to 11 As shown in the drawings, the present application provides a brake, which comprises an iron core, a rotating portion 2 and a locking structure, the locking structure is arranged in the iron core, the rotating portion 2 is provided with a first limiting groove 21 on the side facing the iron core, the locking structure comprises a locking portion 31, the iron core can drive the locking portion 31 to extend out of the iron core or to be retracted into the iron core, when the brake is in the braking state, the locking portion 31 extends out of the iron core and is clamped in the first limiting groove 21 to limit the rotating portion 2 in the circumferential direction, when the brake is in the braking release state, the locking portion 31 is retracted into the iron core from the first limiting groove 21.

[0038] In the above technical solution, the iron core is used for bearing the locking structure and can drive the locking part 31 to realize the actions of extension and retraction. The rotating part 2 generally refers to a hub part connected with the rotating shaft of the motor, and the rotating part 2 rotates together with the rotating shaft of the motor. The locking part 31 cooperates with the first limiting groove 21 to realize the physical clamping limiting of the rotating part 2, and prevents the rotating part 2 from rotating. The brake provided by the application realizes that, after the rotating part 2 stops, the locking part 31 is extended from the iron core and clamped into the first limiting groove 21 on the rotating part 2, so that the rotating part 2 is kept in a locked state, and the situation that the motor rotating shaft is forced to rotate after being subjected to a suddenly increased load or external force impact, resulting in the fragmentation of the friction plate and the damage and failure of the brake, and the like, is avoided, thereby improving the reliability and service life of the brake.

[0039] In an embodiment of the application, the iron core includes a stator 11 and a rotor 12, the rotor 12 is provided with a first mounting groove 121, the locking part 31 is arranged in the first mounting groove 121, and the locking structure further includes a connecting piece, one end of the connecting piece is connected with the locking part 31, and the other end is connected with the stator 11. The locking part 31 is a lever structure, when the brake is in a braking state, the connecting piece pulls the first end of the locking part 31 to move in the direction of the stator 11, and the second end of the locking part 31 moves in the direction of the rotor 12 under the action of the lever and extends into the first limiting groove 21 to limit the rotating part 2 in the circumferential direction.

[0040] In the above technical solution, the stator 11 is used for providing a mounting basis for the connecting piece, and the rotor 12 is used for accommodating the locking part 31, and the switching between the braking state and the braking contact state is realized by the movement of the rotor 12 close to and away from the stator 11. The locking part 31 is a lever structure, and the connecting piece is used for applying a downward pulling force to one end of the locking part 31, so that the other end of the locking part 31 moves in the direction of the rotor 12 under the action of the lever and extends into the first limiting groove 21 to limit the rotating part 2 in the circumferential direction. When the rotor 12 moves in the direction away from the stator 11 and is attached to the surface of the rotating part 2, the rotating part 2 is slowed down to a stop through the friction force between the rotor 12 and the rotating part 2, so as to realize braking, and the brake enters the braking state. At this time, the locking part 31 moves in the direction away from the stator 11 together with the rotor 12 in the first mounting groove 121, the first end of the locking part 31 is subjected to the pulling force of the connecting piece in the direction of the stator 11, so that the first end of the locking part 31 is pulled to the stator 11. Since the locking part 31 is a lever structure, when the first end of the locking part 31 is pulled to the stator 11, the second end of the locking part 31 moves in the direction of the rotor 12 under the action of the lever and extends into the first limiting groove 21 to limit the rotating part 2 in the circumferential direction.

[0041] In an embodiment of the application, the stator 11 is provided with a second mounting groove 111, one end of the connecting piece is connected with the locking part 31, and the other end is arranged in the second mounting groove 111.

[0042] In the technical scheme, the second installation slot 111 provides an installation position for the connecting piece on the stator 11, and the connecting piece can be more stably installed on the stator 11 by setting the second installation slot 111. One end of the connecting piece is connected with the locking part 31, and the other end is arranged in the second installation slot 111. When the connecting piece moves with the mover 12 to the rotating part 2, the connecting piece can generate a resistance to the first end of the locking part 31 towards the stator 11, so that the first end of the locking part 31 moves to the stator 11 relative to the mover 12, thereby ensuring that the second end of the locking part 31 moves to the mover 12 under the lever action and extends into the first limiting slot 21 to circumferentially limit the rotating part 2.

[0043] In one embodiment of the present application, the bottom of the second installation slot 111 is provided with a pin column, one end of the connecting piece is installed in the second installation slot 111 through the pin column, and the other end is connected with the locking part 31.

[0044] In the technical scheme, the pin column can stably fix the connecting piece, so that the connecting piece does not separate from the second installation slot 111 during the movement of the mover 12 to the rotating part 2. In addition, by setting the pin column at the bottom of the second installation slot 111, the connecting piece is more easily assembled and disassembled, and when the connecting piece is damaged and fails, the design of the pin column is also more convenient to replace.

[0045] In one embodiment of the present application, the connecting piece includes a connecting rod or a first elastic piece 32.

[0046] In the above technical solution, the connecting rod is a rigid connection mode, one end of which is connected with the locking part 31, and the other end is arranged in the second mounting groove 111. The connecting rod as a connecting piece has fast response speed, and the movement in the braking and unbraking processes is more smooth, thereby improving the speed and efficiency of the locking part 31 extending into the first limiting groove 21 for limiting. The first elastic piece 32 generally refers to a spring or other elastic component, one end of the first elastic piece 32 is connected with the first end of the locking part 31, and the other end is fixed on the stator 11. When the brake enters the braking state, the rotor 12 moves towards the rotating part 2 and drives the locking part 31 to move, and the first end of the locking part 31 moves towards the stator 11 under the action of the pulling force of the first elastic piece 32, so that the second end of the locking part 31 moves towards the rotor 12 under the action of the lever and extends into the first limiting groove 21 to limit the rotating part 2 in the circumferential direction. Since the first elastic piece 32 has elasticity, the first elastic piece 32 has a greater stretching range, and even if the rotor 12 needs to move a larger distance to reach the braking position, the length of the first elastic piece 32 can change accordingly with the movement of the locking part 31, to ensure that the locking part 31 can accurately extend and retract. In addition, when the brake repeatedly switches between the braking state and the braking contact state, the first elastic piece 32 can withstand repeated stretching and compression, and therefore, compared with the connecting rod, the first elastic piece 32 can ensure a longer service life and better stability, thereby reducing the frequency of maintenance and replacement of the connecting piece due to failure, and reducing maintenance costs. When the rotor 12 moves towards the rotating part 2 to enter the braking position, the center of rotation of the locking part 31 moves towards the rotating part 2 together with the rotor 12, thereby stretching the first elastic piece 32 connected with the locking part 31. Since the first elastic piece 32 itself has the nature of elastic deformation, when the rotor 12 contacts the rotating part 2 for braking, the first elastic piece 32 is in a stretched state and has not pulled down the first end of the locking part 31 to make the second end of the locking part 31 enter the first limiting groove 21 under the action of the lever, thereby avoiding the problem that when the rotating part 2 is just braked and has not slowed down to a safe speed range or a static state, the locking part 31 forcibly enters the first limiting groove 21, causing the locking part 31 or the rotating part 2 to be damaged by a large moment of inertia impact. A very short time after the rotor 12 contacts the rotating part 2, the rotating part 2 can slow down to a safe speed range or a static state under the action of the brake, at which time the first elastic piece 32 begins to elastically contract to pull the first end of the locking part 31 into the second mounting groove 111, and then the second end of the locking part 31 enters the first limiting groove 21 under the action of the lever to realize the clamping and rotation-stopping limiting of the rotating part 2, so the first elastic piece 32 has a certain time delay effect, to ensure that the locking part 31 can safely enter the first limiting groove 21 after the rotating part 2 slows down to a safe speed range or a static state.

[0047] In one embodiment of the present application, the iron core comprises a stator 11 and a rotor 12, the rotor 12 is provided with a first mounting groove 121, the locking part 31 is arranged in the first mounting groove 121, and the locking structure further comprises an electromagnetic control unit arranged in the first limiting groove 21, which can stop the rotation of the rotating part 2 through magnetic force after the rotating part 2 stops rotating when the brake is in the braking state.

[0048] In the above technical solution, the extension and retraction of the locking part 31 are controlled by the electromagnetic control unit. Compared with the scheme that the locking part 31 of the lever structure cooperates with the connecting piece to realize extension and retraction, the electromagnetic control unit can more accurately control the timing of extension and retraction of the locking part 31, ensuring that the locking part 31 enters the first limiting groove 21 for clamping and limiting after the rotating part 2 is braked to a safe speed or completely stopped, thereby further improving the safety of clamping and limiting of the locking part 31 and avoiding the problem that the locking part 31 forcibly enters the first limiting groove 21 when the rotating part 2 is still rapidly rotating, causing damage to the locking structure. The electromagnetic control unit usually comprises an electromagnet, and the locking part 31 comprises a metal telescopic rod with a spring at the bottom or other telescopic structure that can retract into the first mounting groove 121 under the action of magnetic attraction and extend into the first limiting groove 21 when the magnetic attraction disappears. In the initial state, the magnetic attraction generated by the energized electromagnetic control unit causes the metal telescopic rod to retract into the first mounting groove 121 and compresses the spring at the bottom of the locking part 31. When the brake enters the braking state, the rotor 12 is attached to the rotating part 2, causing the rotating part 2 to slow down until it stops. When the rotating speed of the rotating part 2 reaches a safe speed range or the rotating part 2 completely stops, the electromagnetic control unit is de-energized, the metal telescopic rod is ejected from the first mounting groove 121 and extends into the first limiting groove 21 under the elastic force of the spring, realizing the circumferential limiting of the rotating part 2, preventing the rotating part 2 from forcibly rotating under sudden external impact and causing damage to the friction plate 22.

[0049] In one embodiment of the present application, a communication groove 124 is formed on the surface of the rotor 12 facing the rotating part 2, and the second end of the locking part 31 passes through the communication groove 124 to clamp and limit the first limiting groove 21.

[0050] In the above technical solution, the communication groove 124 provides the necessary movement space for the locking part 31, so that the second end of the locking part 31 can pass through the interface between the rotor 12 and the rotating part 2 without obstruction, thereby extending into the first limiting groove 21 to realize clamping and limiting, or withdrawing from the first limiting groove 21 and retracting into the first mounting groove 121 when the brake is released, ensuring that the locking part 31 can realize the circumferential rotation limiting of the rotating part 2.

[0051] In one embodiment of the present application, the locking portion 31 is rotatably arranged in the first mounting groove 121, and the locking portion 31 comprises a first rotating section 311 and a second rotating section 312, one end of the first rotating section 311 is connected with the first elastic member 32, the other end of the first rotating section 311 is connected with one end of the second rotating section 312, and the other end of the second rotating section 312 is clamped in the first limiting groove 21.

[0052] In the above technical solution, one end of the first rotating section 311 is connected with the first elastic member 32, and the other end is connected with one end of the second rotating section 312. The other end of the second rotating section 312 can extend into the first limiting groove 21 to realize clamping and limiting. By designing the locking portion 31 as a two-section rotating structure, the structure of the locking portion 31 is more compact, thereby reducing the proportion of the space occupied by the first limiting groove 21 in the mover 12.

[0053] In one embodiment of the present application, the rotating center of the locking portion 31 is arranged at the connection position of the first rotating section 311 and the second rotating section 312, and the locking portion 31 is rotatably connected with the first mounting groove 121 through a pin at the rotating center.

[0054] In the above technical solution, the pin serves as a connecting member between the locking portion 31 and the mover 12, and provides a rotating fulcrum, i.e., the rotating center, of the locking portion. By arranging the rotating center at the junction of the first rotating section 311 and the second rotating section 312, the locking portion 31 can form a lever structure. When the first rotating section 311 rotates around the rotating center in the direction of the stator 11 under the action of the first elastic member 32, the second rotating section 312 rotates around the rotating center in the direction of the mover 12 under the action of the lever and extends into the first limiting groove 21 to limit the rotating portion 2 in the circumferential direction.

[0055] In one embodiment of the present application, the locking portion 31 further comprises a third rotating section 313, one end of the third rotating section 313 is connected with the other end of the second rotating section 312, and the other end of the third rotating section 313 is clamped in the first limiting groove 21. When the brake is in the brake release state, the first rotating section 311 extends in the horizontal direction, the second rotating section 312 extends away from the first rotating section 311, and the third rotating section 313 extends away from the first rotating section 311 and the second rotating section 312.

[0056] In the above technical solution, the first rotating section 311 is usually connected with the electromagnetic control unit or the first elastic member 32, and in the brake release state, the first rotating section 311 extends in the horizontal direction, thereby ensuring that the locking part 31 does not protrude into the rotor 12 to interfere with the normal rotation of the rotating part 2 in the non-braking state. The second rotating section 312 is located between the first rotating section 311 and the third rotating section 313, and plays a connecting and driving role. When the brake enters the braking state, the electromagnetic control unit or the first elastic member 32 drives the first rotating section 311 to move towards the stator 11, and under the action of the lever, the second rotating section 312 rotates around the rotating center away from the stator 11, and drives the third rotating section 313 to rotate around the rotating center away from the stator 11 together with the second rotating section 312, and extends into the first limiting groove 21 to realize the rotation limiting. The second end of the third rotating section 313 is used for clamping in the first limiting groove 21 of the rotating part 2, thereby realizing the physical locking of the rotating part 2. By adjusting the angles between the first rotating section 311, the second rotating section 312 and the third rotating section 313, it is ensured that in the brake release state, the three rotating sections can be completely withdrawn into the first mounting groove, and at the same time, in the braking state, the third rotating section 313 can be clamped in the first limiting groove 21.

[0057] In an embodiment of the present application, one side of the rotating part 2 facing the iron core is provided with a friction plate 22, and the rotor 12 is provided with a pressing part 122. When the brake is in the braking state, the pressing part 122 is in contact with the friction plate 22.

[0058] In the above technical solution, the friction plate 22 is used to bear the pressure from the pressing part 122, and through the friction force between the friction plate 22 and the pressing part 122, the rotating speed of the rotating part 2 is reduced until the rotating part 2 stops rotating, thereby realizing the braking of the rotating part 2. The friction plate 22 is usually made of a material with high friction coefficient and wear resistance, such as graphite, copper-based alloy or ceramic matrix composite. When the brake enters the braking state, the pressing part 122 on the rotor 12 contacts the friction plate 22, and the friction force between the two makes the rotating part 2 decelerate to stop, thereby realizing the braking function. The pressing part 122 is located on the rotor 12, and the function of the pressing part 122 is to convert the elastic force of the second elastic member 4 on the rotor 12 into pressure on the friction plate 22, thereby increasing the contact area and pressure intensity and improving the friction force between the rotor 12 and the rotating part 2. This design ensures that even in the case of power failure or emergency, the brake can quickly respond and exert sufficient friction force to make the rotating part 2 quickly decelerate and stop, thereby making the brake have better safety and reliability.

[0059] In an embodiment of the present application, the thickness b of the locking part 31 is smaller than the width t of the first limiting groove 21.

[0060] In the above technical solution, the thickness b of the locking portion 31 needs to be smaller than the width t of the first limiting groove 21, so as to ensure that the locking portion 31 can be clamped into the first limiting groove 21, and rotation of the rotating portion 2 is limited.

[0061] In an embodiment of the present application, one side of the rotating portion 2 facing the iron core is provided with a friction plate 22, the mover 12 is provided with a shaft hole in the center, and a plurality of first limiting grooves 21 are arranged in a circumferential direction on the surface between the friction plate 22 and the shaft hole.

[0062] In the above technical solution, the shaft hole enables the rotating portion 2 to be sleeved on the rotating shaft 5, so as to ensure that the rotating portion 2 can rotate together with the rotating shaft 5. The plurality of first limiting grooves 21 arranged in a circumferential direction on the surface between the friction plate 22 and the shaft hole provide a plurality of clamping positions for the locking portion 31, so that the locking portion 31 can form physical clamping with the rotating portion 2 at a plurality of positions. Compared with a single limiting groove, this multi-point contact mode improves the stability and reliability of the circumferential rotation limiting. Meanwhile, the plurality of first limiting grooves 21 arranged in a circumferential direction also increase the clamping opportunity of the locking portion 31 and the first limiting groove 21. Even if the locking portion 31 fails to be directly clamped into the first limiting groove 21 but abuts against the protrusion between the first limiting grooves 21, the locking portion 31 can quickly find at least one limiting groove for clamping by virtue of the rotational inertia of the rotating portion 2.

[0063] In an embodiment of the present application, the iron core includes the stator 11, the mover 12, and the second elastic member 4. The stator 11 and the mover 12 have an active gap 6 therebetween. When the brake is in a braking state, the second elastic member 4 can push the mover 12 to contact and brake the rotating portion 2 in the active gap 6.

[0064] In the above technical solution, the active gap 6 is located between the stator 11 and the mover 12, so as to provide a space for compression and expansion of the second elastic member 4, thereby ensuring that the mover 12 can contact the friction plate 22 on the rotating portion 2 under the elastic force of the second elastic member 4 after the stator winding 112 is de-energized, and switching from a brake release state to a braking state is realized. When the brake is in the brake release state, the stator winding 112 is energized to generate a magnetic attraction force on the mover 12. The mover 12 moves to the stator 11 under the magnetic attraction force to compress the active gap 6, thereby compressing the second elastic member 4, converting the pressure into elastic potential energy, and separating the mover 12 from the friction plate 22, so that the rotating portion 2 can rotate freely. When the brake enters the braking state, the stator winding 112 is de-energized, and the magnetic attraction force disappears. At this time, since the second elastic member 4 itself has the property of elasticity, the second elastic member 4 expands to convert the elastic potential energy into an elastic force on the mover 12, thereby pushing the mover 12 to move towards the rotating portion 2, so that the mover 12 contacts the friction plate 22 to realize the effect of braking the rotating portion 2.

[0065] In one embodiment of the present application, the iron core comprises a stator 11 and a rotor 12, the rotor 12 is provided with a second limiting groove 123, and the stator 11 is provided with a limiting part 113, which is inserted into the second limiting groove 123.

[0066] In the above technical solution, by inserting the limiting part 113 into the second limiting groove 123, on the one hand, the guiding of the rotor 12 is realized, and it is ensured that the hole positions and connecting parts between the rotor 12 and the stator 11 can be aligned with each other when the rotor 12 is installed on the stator 11, and on the other hand, the rotor 12 is also prevented from rotating, which prevents the rotor 12 from rotating together with the rotating part 2 when the rotor 12 is bonded and braked with the rotating part 2, so as to avoid the deviation of the locking structure caused by the rotating part 2.

[0067] In one embodiment of the present application, the brake further comprises a rotating shaft 5, and the rotating part 2 and the iron core are sleeved on the rotating shaft 5.

[0068] In the above technical solution, the rotating shaft 5 is used to bear the iron core and the rotating part 2, and axially align the iron core and the rotating part 2, so as to facilitate the iron core to better brake and limit the rotation of the rotating part 2. The rotating part 2 is fixed on the rotating shaft 5 through the connecting key, so that the rotor 12 can brake the rotating shaft 5 through the friction between the rotor 12 and the rotating part 2.

[0069] In one embodiment of the present application, the brake comprises a plurality of first elastic members 32, a plurality of second elastic members 4, and a plurality of limiting parts 113, and the plurality of first elastic members 32, the plurality of second elastic members 4, and the plurality of limiting parts 113 are located on the outer periphery of the stator 11 and are arranged in a circumferential direction.

[0070] In the above technical solution, the plurality of first elastic members 32 are distributed in the circumferential direction, so as to realize multi-point clamping and rotation limiting in cooperation with the plurality of locking parts 31. Compared with the scheme of clamping and limiting by a single first elastic member 32 and a locking part 31, the multi-point clamping and rotation limiting improves the stability and reliability of the circumferential rotation limiting, and avoids the deflection of the rotor 12 caused by single-point stress. The plurality of second elastic members 4 are uniformly distributed in the circumferential direction, which can ensure that each part of the pressing part 122 of the rotor 12 can contact the friction plate 22 at the same time when the rotor 12 enters the braking state, thereby avoiding the situation that the rotor 12 enters the braking position in a deflected posture and causes the rotor 12 to locally contact and brake the friction plate 22, thereby reducing the probability of damage of the friction plate 22 and improving the service life and reliability of the brake. The plurality of limiting parts 113 are distributed in the circumferential direction, and inserting the plurality of limiting parts 113 into the corresponding second limiting grooves 123 can further improve the accuracy of the guiding of the limiting part 113 to the rotor 12, and also can further improve the rotation limiting effect of the limiting part 113 to the rotor 12.

[0071] In one embodiment of the present application, the stator 11 is provided with a third mounting groove 114, one end of the second elastic member 4 is arranged in the third mounting groove 114, and the other end is in abutment with the rotor 12.

[0072] In the above technical solution, the third mounting groove 114 is used to limit the second elastic member 4, ensuring the stable installation of the second elastic member 4 in the brake, preventing the second elastic member 4 from being displaced or deflected due to the vibration of the brake during operation, thereby avoiding the situation that the second elastic member 4 fails to normally reach the braking position under the action of the elastic force, and further improving the reliability of the brake. The third mounting groove 114 can also optimize the transmission path of the elastic force. When the brake is powered off, the second elastic member 4 can quickly and uniformly transmit the elastic force to the rotor 12 along the third mounting groove 114, push the rotor 12 to approach the friction plate 22, and thus realize braking, avoiding the situation that the elastic force is not uniformly transmitted, causing the rotor 12 and the friction plate 22 to locally contact and brake, and improving the service life and braking effect of the brake.

[0073] In one embodiment of the present application, the height of the locking portion 31 is L, the depth of the first limiting groove 21 is h, and L≥h.

[0074] In the above technical solution, the height L of the locking portion 31 is designed to be greater than or equal to the depth h of the first limiting groove 21, so as to ensure that the locking portion 31 can be fully clamped into the first limiting groove 21 in the braking state of the brake, forming a stable physical clamping limiting. This design can prevent the problem that the clamping portion of the locking portion 31 in the first limiting groove 21 is too short due to insufficient height of the locking portion 31, thereby ensuring that the locking portion 31 has sufficient rotation stopping performance and reliability.

[0075] For reference, Figures 1 to 11 The present application also provides an electric machine comprising the brake.

[0076] In the above technical solution, by adopting the brake of the present application, the electric machine can always maintain the locking of the rotating part 2 when subjected to a suddenly increased load or external force impact, thereby avoiding the problem that the rotating part 2 forcibly rotates in the braking state, causing the friction plate 22 to be broken and further causing the brake to be damaged and fail.

[0077] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: The iron core is used to bear the locking structure and can also drive the locking portion 31 to realize the actions of extension and retraction. The rotating portion 2 generally refers to the hub portion connected with the rotating shaft of the motor, and the rotating portion 2 rotates together with the rotating shaft of the motor. The locking portion 31 cooperates with the first limiting groove 21 to realize the physical clamping limiting of the rotating portion 2, and prevents the rotating portion 2 from rotating. The brake provided by the present application sets the locking structure and the first limiting groove 21, and after the rotating portion 2 stops, the locking portion 31 is extended from the iron core and clamped into the first limiting groove 21 on the rotating portion 2, so that the rotating portion 2 remains in the locked state, avoiding the situation that the motor rotating shaft is forced to rotate after being subjected to a suddenly increased load or external force impact, resulting in the fragmentation of the friction plate and the damage and failure of the brake, thereby improving the reliability and service life of the brake.

[0078] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0079] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0080] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A brake characterized by, The brake comprises an iron core, a rotating part (2) and a locking structure, one side of the rotating part (2) is provided with a first limiting groove (21) facing the iron core, the locking structure comprises a locking part (31), the iron core can drive the locking part (31) to extend out of the iron core or retract into the iron core, when the brake is in a braking state, the locking part (31) extends out of the iron core and is clamped in the first limiting groove (21) to limit the rotating part (2) in the circumferential direction, when the brake is in a braking release state, the locking part (31) is retracted into the iron core from the first limiting groove (21).

2. The brake of claim 1, wherein The iron core comprises a stator (11) and a rotor (12), the rotor (12) is provided with a first mounting groove (121), the locking part (31) is arranged in the first mounting groove (121), the locking structure further comprises a connecting piece, one end of the connecting piece is connected with the locking part (31), and the other end of the connecting piece is connected with the stator (11), the locking part (31) is a lever structure, when the brake is in a braking state, the connecting piece pulls the first end of the locking part (31) to move in the direction of the stator (11), the second end of the locking part (31) moves in the direction of the rotor (12) under the action of the lever and extends into the first limiting groove (21) to limit the rotating part (2) in the circumferential direction.

3. The brake of claim 2, wherein The stator (11) is provided with a second mounting groove (111), one end of the connecting piece is connected with the locking part (31), and the other end of the connecting piece is arranged in the second mounting groove (111).

4. The brake of claim 3, wherein The connecting piece comprises a connecting rod or a first elastic piece (32).

5. The brake of claim 4, wherein, The locking part (31) is rotationally arranged in the first mounting groove (121), the locking part (31) comprises a first rotating section (311) and a second rotating section (312), the first end of the first rotating section (311) is connected with the first elastic piece (32), the second end of the first rotating section (311) is connected with the first end of the second rotating section (312), and the second end of the second rotating section (312) is clamped in the first limiting groove (21).

6. The brake of claim 5 wherein, The locking part (31) further comprises a third rotating section (313), the first end of the third rotating section (313) is connected with the second end of the second rotating section (312), and the second end of the third rotating section (313) is clamped in the first limiting groove (21), when the brake is in a braking release state, the first rotating section (311) extends in the horizontal direction, the second rotating section (312) extends away from the first rotating section (311), and the third rotating section (313) extends away from the first rotating section (311) and the second rotating section (312).

7. The brake of claim 2 wherein, The rotor (12) is provided with a communication groove (124) on the surface facing the rotating part (2), and the second end of the locking part (31) clamps and limits the first limiting groove (21) through the communication groove (124).

8. The brake of claim 2 wherein, The rotating part (2) is provided with a friction plate (22) on the side facing the iron core, and the mover (12) is provided with a pressing part (122), which is in contact with the friction plate (22) when the brake is in the braking state.

9. The brake of claim 1, wherein, The thickness of the locking part (31) is less than the width of the first limiting groove (21).

10. The brake of claim 2 wherein, The rotating part (2) is provided with a friction plate (22) on the side facing the iron core, and the mover (12) is provided with a shaft hole, and a plurality of first limiting grooves (21) are arranged on the surface between the friction plate (22) and the shaft hole in a circumferential direction.

11. The brake of claim 1, wherein, The iron core comprises a stator (11), a mover (12), and a second elastic member (4), the stator (11) and the mover (12) have an active gap (6) therebetween, and the second elastic member (4) can push the mover (12) to contact and brake the rotating part (2) in the active gap (6) when the brake is in the braking state.

12. The brake of claim 1, wherein, The iron core comprises a stator (11) and a mover (12), the mover (12) is provided with a second limiting groove (123), and the stator (11) is provided with a limiting part (113), which is inserted into the second limiting groove (123).

13. The brake of claim 1, wherein, The brake further comprises a rotating shaft (5), and the rotating part (2) and the iron core are sleeved on the rotating shaft (5).

14. The brake of claim 2 wherein, The brake comprises a first elastic member (32), a second elastic member (4), and a limiting part (113), and a plurality of first elastic members (32), a plurality of second elastic members (4), and a plurality of limiting parts (113) are arranged on the outer periphery of the stator (11) in a circumferential direction.

15. The brake of claim 1, wherein, The iron core comprises a stator (11) and a mover (12), the mover (12) is provided with a first mounting groove (121), the locking part (31) is arranged in the first mounting groove (121), and the locking structure further comprises an electromagnetic control unit, which is arranged in the first limiting groove (21), and the electromagnetic control unit can make the locking part (31) extend into the first limiting groove (21) to limit the rotating part (2) in a circumferential direction through magnetic force when the brake is in the braking state and the rotating part (2) stops rotating.

16. An electric machine characterized by The brake is the brake according to any one of claims 1 to 15.

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