Brake and motor

Abstract

The invention provides a brake and a motor. The brake comprises an iron core, a rotating part (2) and a locking structure, the locking structure is arranged in the iron core, a first limiting groove (21) is formed in the face, facing the iron core, of the rotating part (2), the locking structure comprises a locking part (31), and the iron core can drive the locking part (31) to stretch out of the iron core or retract into the iron core. The locking part (31) extends out of the iron core and is clamped in the first limiting groove (21) to circumferentially limit the rotating part (2), and when the brake is in a brake release state, the locking part (31) is retracted into the iron core from the first limiting groove (21). According to the brake and the motor provided by the invention, the problem that an existing brake is easy to forcibly rotate to cause damage and failure under the condition that the existing brake is impacted by strong external force can be solved.

Description

Technical Field

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

[0002] Motor brakes play a core role in many fields such as industrial automation, elevator control, crane operation, logistics and transportation. Especially in industrial robots, brakes are needed to achieve instant stop and accurate positioning of robot joint movement. Providing instant and accurate stop control for motors through brakes can not only significantly enhance the safety and reliability of equipment operation, but also greatly improve the performance and production efficiency of equipment. Therefore, brakes are an indispensable key component in modern electromechanical equipment.

[0003] Current brakes mainly rely on the friction between the brake armature and the friction plate to achieve braking of the motor shaft. However, after the motor stops rotating, when the equipment driven by the motor is subjected to a sudden increase in load or external force impact, the external force exerted on the motor shaft greatly exceeds 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 cause the brake to be damaged and fail, thereby greatly reducing the reliability and life of the brake. Summary of the invention

[0004] The main purpose of the present invention is to provide a brake that can solve the problem that the existing brake is easily forcibly rotated when subjected to a strong external force impact, resulting in damage and failure of the brake.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a brake is provided, including an iron core, a rotating part and a locking structure, the locking structure is arranged in the iron core, a first limiting groove is arranged on a side of the rotating part facing the iron core, the locking structure includes a locking part, the iron core can drive the locking part to extend from the iron core or be retracted into the iron core, when the brake is in a braking state, the locking part extends from the iron core and is clamped in the first limiting groove to circumferentially limit the rotating part, when the brake is in a brake release state, the locking part is retracted into the iron core by the first limiting groove.

[0006] Furthermore, the iron core includes a stator and a mover, a first mounting groove is arranged in the mover, the locking part is arranged in the first mounting groove, and the locking structure also includes a connecting piece, one end of the connecting piece is connected to the locking part, and the other end is connected to the stator, and 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, and the second end of the locking part moves in the direction of the mover under the action of the lever and extends into the first limiting groove to circumferentially limit the rotating part.

[0007] Furthermore, a second mounting groove is provided on the stator, one end of the connecting piece is connected to the locking portion, and the other end is provided in the second mounting groove.

[0008] Furthermore, the connecting member includes a connecting rod or a first elastic member.

[0009] Furthermore, a connecting groove is provided on the surface of the mover facing the rotating part, and the second end of the locking part passes through the connecting groove to engage and limit the first limiting groove.

[0010] Furthermore, the locking part is rotatably arranged in the first installation groove, and the locking part includes a first rotating section and a second rotating section. The first end of the first rotating section is connected to the first elastic member, the second end of the first rotating section is connected to the first end of the second rotating section, and the second end of the second rotating section is clamped in the first limiting groove.

[0011] Furthermore, the locking portion also includes a third rotating section, a first end of the third rotating section is connected to the second end of the second rotating section, and the second end of the third rotating section is clamped in the first limiting groove. When the brake is in a brake release state, the first rotating section extends in a horizontal direction, the second rotating section extends in a direction away from the first rotating section, and the third rotating section extends in a direction away from the first rotating section and the second rotating section.

[0012] Furthermore, a friction plate is arranged on a side of the rotating part facing the iron core, and a pressure-applying part is arranged on the mover. When the brake is in a braking state, the pressure-applying part contacts the friction plate.

[0013] Furthermore, the thickness of the locking portion is smaller than the width of the first limiting groove.

[0014] Furthermore, a friction plate is provided on one side of the rotating part facing the iron core, an axial hole is provided at the center of the mover, and a plurality of first limiting grooves are arranged at intervals along the circumferential direction on the surface between the friction plate and the axial hole.

[0015] Furthermore, the iron core includes a stator, a mover and a second elastic member, and there is a movable gap between the stator and the mover. When the brake is in a braking state, the second elastic member can push the mover to contact the rotating part in the movable gap for braking.

[0016] Furthermore, the iron core includes a stator and a mover, the mover is provided with a second limiting groove, the stator is provided with a limiting portion, and the limiting portion is inserted into the second limiting groove.

[0017] Furthermore, the brake also includes a rotating shaft, and the rotating part and the iron core are sleeved on the rotating shaft.

[0018] Furthermore, the brake comprises a first elastic member, a second elastic member and a limiting portion, and a plurality of first elastic members, a plurality of second elastic members and a plurality of limiting portions are all located on the outer periphery of the stator and are arranged at intervals along the circumferential direction.

[0019] Furthermore, the iron core includes a stator and a mover, a first mounting groove is arranged in the mover, the locking part is arranged in the first mounting groove, and the locking structure also includes an electromagnetic control unit, and the electromagnetic control unit is arranged in the first limit groove. When the brake is in a braking state, the electromagnetic control unit can use magnetic force to make the locking part extend into the first limit groove to circumferentially limit the rotating part after the rotating part stops rotating.

[0020] According to another aspect of the present invention, a motor is provided, comprising a brake, wherein the brake is the above-mentioned brake.

[0021] By applying the technical solution of the present invention, the iron core is used to carry the locking structure and can also drive the locking part to realize the extension and retraction action. The rotating part usually refers to the hub part connected to the rotating shaft of the motor, and the rotating part rotates together with the rotating shaft of the motor. The locking part cooperates with the first limiting groove to realize the physical clamping limit of the rotating part to prevent the rotating part from rotating. The brake provided by the present invention, by providing a locking structure and a first limiting groove, extends the locking part from the iron core and snaps into the first limiting groove on the rotating part after the rotating part stops, so that the rotating part remains in a locked state, avoiding the situation that the motor shaft is forced to rotate after being subjected to a sudden increase in load or external force impact, resulting in the friction plate being broken and the brake being damaged and failing, thereby improving the reliability and life of the brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 An exploded view of a brake showing an embodiment of the present invention;

[0024] Figure 2 A schematic diagram showing the overall structure of the rotating part of the brake according to an embodiment of the present invention;

[0025] Figure 3 A front view showing a rotating portion of a brake according to an embodiment of the present invention;

[0026] Figure 4 The overall structural schematic diagram of the stator of the brake according to the embodiment of the present invention is shown;

[0027] Figure 5 A cross-sectional view showing a brake in a locked state according to an embodiment of the present invention;

[0028] Figure 6 A cross-sectional view showing a brake in an unlocked state according to an embodiment of the present invention;

[0029] Figure 7The overall structural schematic diagram of the locking portion of the brake according to the embodiment of the present invention is shown;

[0030] Figure 8 A cross-sectional view showing a rotating portion of a brake according to an embodiment of the present invention;

[0031] Fig. 9 A cross-sectional view of a stator of a brake according to an embodiment of the present invention is shown;

[0032] Fig.10 A cross-sectional view showing a mover of a brake in a locked state according to an embodiment of the present invention; and

[0033] Fig.11 A cross-sectional view showing a mover of a brake in an unlocked state according to an embodiment of the present invention.

[0034] The above drawings include the following reference numerals:

[0035] 11. stator; 111. second mounting slot; 112. stator winding; 113. limiting portion; 114. third mounting slot; 12. mover; 121. first mounting slot; 122. pressure-applying portion; 123. second limiting slot; 124. connecting slot; 2. rotating portion; 21. first limiting slot; 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 gap. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] See also Figures 1 to 11 As shown, the present invention provides a brake, which includes an iron core, a rotating part 2 and a locking structure, wherein the locking structure is arranged in the iron core, and a first limiting groove 21 is arranged on a side of the rotating part 2 facing the iron core, and the locking structure includes a locking part 31, and the iron core can drive the locking part 31 to extend from the iron core or be retracted into the iron core. When the brake is in a braking state, the locking part 31 extends from the iron core and is clamped in the first limiting groove 21 to circumferentially limit the rotating part 2. When the brake is in a brake release state, the locking part 31 is retracted into the iron core by the first limiting groove 21.

[0038] In the above technical solution, the iron core is used to carry the locking structure and can also drive the locking part 31 to realize the extension and retraction action. The rotating part 2 usually refers to the hub part connected to the rotating shaft of the motor, and the rotating part 2 rotates with the rotating shaft of the motor. The locking part 31 cooperates with the first limiting groove 21 to realize the physical clamping limit of the rotating part 2 to prevent the rotating part 2 from rotating. The brake provided by the present invention, by providing a locking structure and a first limiting groove 21, extends the locking part 31 from the iron core and snaps into the first limiting groove 21 on the rotating part 2 after the rotating part 2 stops, so that the rotating part 2 remains in a locked state, avoiding the situation that the motor shaft is forced to rotate after being subjected to a sudden increase in load or external force impact, resulting in the friction plate being broken and the brake being damaged and failing, thereby improving the reliability and life of the brake.

[0039] In one embodiment of the present invention, the iron core includes a stator 11 and a mover 12, a first mounting groove 121 is provided in the mover 12, a locking portion 31 is provided in the first mounting groove 121, and the locking structure also includes a connecting member, one end of the connecting member is connected to the locking portion 31, and the other end is connected to the stator 11, the locking portion 31 is a lever structure, when the brake is in a braking state, the connecting member pulls the first end of the locking portion 31 to move in the direction of the stator 11, and the second end of the locking portion 31 moves in the direction of the mover 12 under the action of the lever and extends into the first limiting groove 21 to circumferentially limit the rotating portion 2.

[0040] In the above technical solution, the stator 11 is used to provide a mounting base for the connector, the mover 12 is used to accommodate the locking portion 31, and the switching between the braking state and the braking contact state is achieved by the movement of the mover 12 approaching and moving away from the stator 11. The locking portion 31 is a lever structure, and the connector is used to apply a downward pulling force to one end of the locking portion 31, so that the other end of the locking portion 31 moves toward 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 circumferentially. When the mover 12 moves in a direction away from the stator 11 and fits with the surface of the rotating part 2, the friction force between the mover 12 and the rotating part 2 slows down the rotating part 2 until it stops, thereby achieving braking. The brake enters a braking state. At this time, the locking portion 31 moves in the first mounting groove 121 together with the mover 12 in a direction away from the stator 11, and the first end of the locking portion 31 is subjected to a pulling force of the connecting member in the direction of the stator 11, causing the first end of the locking portion 31 to be pulled toward the stator 11. Since the locking portion 31 is a lever structure, when the first end of the locking portion 31 is pulled toward the stator 11, the second end of the locking portion 31 moves in the direction of the mover 12 under the action of the lever and extends into the first limiting groove 21 to circumferentially limit the rotating part 2.

[0041] In one embodiment of the present invention, a second mounting groove 111 is provided on the stator 11 , one end of the connecting member is connected to the locking portion 31 , and the other end is disposed in the second mounting groove 111 .

[0042] In the above technical solution, the second mounting groove 111 provides a mounting position for the connector on the stator 11. By providing the second mounting groove 111, the connector can be more stably mounted on the stator 11. One end of the connector is connected to the locking portion 31, and the other end is arranged in the second mounting groove 111. When the connector moves toward the rotating portion 2 together with the mover 12, the connector can generate resistance to the first end of the locking portion 31 toward the stator 11, so that the first end of the locking portion 31 moves relative to the mover 12 in the direction of the stator 11, thereby ensuring that the second end of the locking portion 31 moves in the direction of the mover 12 under the action of the lever, and extends into the first limiting groove 21 to circumferentially limit the rotating portion 2.

[0043] In one embodiment of the present invention, a pin is provided at the bottom of the second installation groove 111 , one end of the connecting member is installed in the second installation groove 111 through the pin, and the other end is connected to the locking portion 31 .

[0044] In the above technical solution, the pin can stably fix the connecting member to prevent the connecting member from being separated from the second mounting groove 111 during the movement of the mover 12 toward the rotating part 2. In addition, by providing a pin at the bottom of the second mounting groove 111, the connecting member is easier to assemble and disassemble, and when the connecting member is damaged and fails, the design of the pin is also easier to replace.

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

[0046] In the above technical solution, the connecting rod is a rigid connection method, one end of which is connected to the locking part 31, and the other end is arranged in the second mounting groove 111. The use of the connecting rod as a connecting member has a fast response speed, and the movement during braking and releasing the brake is smoother, thereby improving the speed and efficiency of the locking part 31 extending into the first limiting groove 21 for limiting. The first elastic member 32 generally refers to a spring or other elastic member, one end of the first elastic member 32 is connected to 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 mover 12 moves toward the rotating part 2 and drives the locking part 31 to move together. The first end of the locking part 31 moves toward the stator 11 under the pulling force of the first elastic member 32, so that the second end of the locking part 31 moves 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 part 2 circumferentially. Since the first elastic member 32 is elastic, the first elastic member 32 has a larger stretching range. Even if the mover 12 needs to move a large distance to reach the braking position, the length of the first elastic member 32 can change accordingly with the movement of the locking portion 31, ensuring that the locking portion 31 can be accurately extended and retracted. In addition, when the brake repeatedly switches between the braking state and the braking contact state, the first elastic member 32 can withstand repeated stretching and compression. Therefore, compared with the connecting rod, the first elastic member 32 can ensure a longer life and better stability, thereby reducing the frequency of maintenance and replacement required for failure of the connecting member and reducing maintenance costs. When the mover 12 moves toward the direction of the rotating portion 2 to enter the braking position, the rotation center of the locking portion 31 moves along with the mover 12 toward the direction of the rotating portion 2, thereby stretching the first elastic member 32 connected to the locking portion 31. Since the first elastic member 32 itself has the property of elastic deformation, when the mover 12 contacts the rotating part 2 for braking, the first elastic member 32 is in a stretched state and has not yet pulled down the first end of the locking part 31 so that the second end of the locking part 31 enters the first limiting groove 21 under the action of the lever, thereby avoiding the problem that when the rotating part 2 is just subjected to the braking action and has not decelerated to a safe speed range or a stationary state, the locking part 31 is forcibly stuck in the first limiting groove 21, causing the locking part 31 or the rotating part 2 to be damaged by a large rotational inertia impact. Within a very short time after the mover 12 contacts the rotating part 2, the rotating part 2 can be decelerated to a safe speed range or a stationary state under the action of braking. At this time, the first elastic member 32 begins to elastically contract, pulling 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 limit groove 21 under the action of the lever, thereby realizing the locking and rotation limiting of the rotating part 2. Therefore, the first elastic member 32 has a certain delay effect, ensuring that the locking part 31 can be safely clamped into the first limit groove 21 after the rotating part 2 is decelerated to a safe speed range or a stationary state.

[0047] In one embodiment of the present invention, the iron core includes a stator 11 and a mover 12, a first mounting groove 121 is provided in the mover 12, a locking portion 31 is provided in the first mounting groove 121, and the locking structure also includes an electromagnetic control unit, which is provided in the first limiting groove 21. When the brake is in a braking state, the electromagnetic control unit can use magnetic force to extend the locking portion 31 into the first limiting groove 21 to circumferentially limit the rotating part 2 after the rotating part 2 stops rotating.

[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 solution in which 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 the extension and retraction of the locking part 31, ensuring that after the rotating part 2 is braked and decelerated to a safe speed or completely stopped, the locking part 31 is controlled to enter the first limit groove 21 for clamping and limiting, thereby further improving the safety of the clamping and limiting of the locking part 31, and avoiding the problem that the locking part 31 is forcibly clamped into the first limit groove 21 when the rotating part 2 is still rotating rapidly, causing damage to the locking structure. The electromagnetic control unit usually includes an electromagnet, and the locking part 31 includes a metal telescopic rod with a spring at the bottom, or other telescopic structures that can be retracted into the first installation groove 121 under the magnetic attraction force and extended into the first limit groove 21 when the magnetic attraction force disappears. In the initial state, the magnetic attraction force generated by the electromagnetic control unit when it is powered on causes the metal telescopic rod to shrink in the first mounting groove 121 and compress the spring at the bottom of the locking portion 31. When the brake enters the braking state, the mover 12 is fitted with the rotating part 2 to decelerate the rotating part 2 until it stops. When the rotation speed of the rotating part 2 reaches a safe speed range or the rotating part 2 stops completely, the electromagnetic control unit is powered off. The metal telescopic rod that loses the magnetic attraction pops out of the first mounting groove 121 and extends into the first limit groove 21 under the action of the elastic force of the spring, thereby achieving circumferential limitation of the rotating part 2 to prevent the rotating part 2 from being forcibly rotated under a sudden external force impact and causing damage to the friction plate 22.

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

[0050] In the above technical solution, the connecting groove 124 provides the locking part 31 with necessary movement space, so that the second end of the locking part 31 can pass through the interface between the mover 12 and the rotating part 2 without hindrance, thereby extending into the first limit groove 21 to achieve the card-engagement limit, or exit the first limit groove 21 and retract to the first installation groove 121 when the brake is released, ensuring that the locking part 31 can achieve the circumferential rotation limit of the rotating part 2.

[0051] In one embodiment of the present invention, the locking portion 31 is rotatably disposed in the first mounting groove 121, and the locking portion 31 includes a first rotating section 311 and a second rotating section 312, the first end of the first rotating section 311 is connected to the first elastic member 32, the second end of the first rotating section 311 is connected to 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.

[0052] In the above technical solution, one end of the first rotating section 311 is connected to the first elastic member 32, and the other end is connected to the first end of the second rotating section 312. The second end of the second rotating section 312 can be inserted into the first limiting groove 21 to achieve clamping and limiting. By designing the locking portion 31 as a two-stage rotating structure, the structure of the locking portion 31 is made 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 invention, the rotation center of the locking portion 31 is set at the connection between the first rotation section 311 and the second rotation section 312, and the locking portion 31 is rotationally connected to the first installation groove 121 at the rotation center through a pin.

[0054] In the above technical solution, the pin serves as a connecting piece between the locking part 31 and the mover 12, providing a rotation fulcrum of the locking part, i.e., a rotation center. The rotation center is set at the junction of the first rotating section 311 and the second rotating section 312, so that the locking part 31 can form a lever structure. When the first rotating section 311 rotates toward the stator 11 around the rotation center under the action of the first elastic member 32, the second rotating section 312 rotates toward the mover 12 around the rotation center under the action of the lever and extends into the first limiting groove 21 to limit the rotating part 2 circumferentially.

[0055] In one embodiment of the present invention, the locking portion 31 also includes a third rotating section 313, the first end of the third rotating section 313 is connected to 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 brake release state, the first rotating section 311 extends in a horizontal direction, the second rotating section 312 extends in a direction away from the first rotating section 311, and the third rotating section 313 extends in a direction 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 to the electromagnetic control unit or the first elastic member 32. In the brake release state, the first rotating section 311 extends in the horizontal direction, ensuring that the locking part 31 will not extend out of the mover 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 role of connection and transmission. 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 toward the stator 11. Under the action of the lever, the second rotating section 312 rotates around the rotation center away from the stator 11, and drives the third rotating section 313 to rotate together with the second rotating section 312 around the rotation center away from the stator 11, and extends into the first limiting groove 21 to achieve the stop rotation limit. The second end of the third rotating section 313 is used to be clamped in the first limiting groove 21 of the rotating part 2 to achieve physical locking of the rotating part 2. By adjusting the angles among the first rotating section 311, the second rotating section 312 and the third rotating section 313, it is ensured that the three rotating sections can be fully retracted into the first mounting groove in the brake release state, and the third rotating section 313 can be just engaged in the first limiting groove 21 in the brake state.

[0057] In one embodiment of the present invention, a friction plate 22 is provided on a side of the rotating part 2 facing the iron core, and a pressure-applying part 122 is provided on the mover 12 . When the brake is in a braking state, the pressure-applying part 122 contacts the friction plate 22 .

[0058] In the above technical solution, the friction plate 22 is used to bear the pressure from the pressure-applying part 122, and the friction between the friction plate 22 and the pressure-applying part 122 is used to reduce the rotation speed of the rotating part 2 until the rotating part 2 stops rotating, thereby achieving braking of the rotating part 2. The friction plate 22 is usually made of a wear-resistant material with a high friction coefficient, such as graphite, copper-based alloy or ceramic-based composite material. When the brake enters the braking state, the pressure-applying part 122 on the mover 12 contacts the friction plate 22, and the friction between the two causes the rotating part 2 to slow down to stop, thereby achieving the braking function. The pressure-applying part 122 is located on the mover 12, and the function of the pressure-applying part 122 is to convert the elastic force of the second elastic member 4 on the mover 12 into pressure on the friction plate 22, and the friction between the mover 12 and the rotating part 2 is increased by increasing the contact area and pressure intensity. This design ensures that even in a power outage or emergency, the brake can respond quickly and apply sufficient friction to quickly slow down and stop the rotating part 2, so that the brake has good safety and reliability.

[0059] In one embodiment of the present invention, the thickness b of the locking portion 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 to ensure that the locking portion 31 can be inserted into the first limiting groove 21 to achieve the anti-rotation limit of the rotating portion 2.

[0061] In one embodiment of the present invention, a friction plate 22 is provided on the side of the rotating part 2 facing the iron core, an axial hole is provided at the center of the mover 12, and a plurality of first limiting grooves 21 are arranged at intervals along the circumferential direction on the surface between the friction plate 22 and the axial hole.

[0062] In the above technical solution, the shaft hole enables the rotating part 2 to be sleeved on the rotating shaft 5, ensuring that the rotating part 2 can rotate together with the rotating shaft 5. A plurality of first limiting grooves 21 are arranged circumferentially on the surface between the friction plate 22 and the shaft hole, providing a plurality of positions for clamping and limiting the locking part 31, so that the locking part 31 can form a physical clamping connection with the rotating part 2 at multiple positions. This multi-point contact method improves the stability and reliability of the circumferential stop and limit compared to a single limiting groove. At the same time, the plurality of first limiting grooves 21 arranged circumferentially also increase the chances of the locking part 31 being clamped with the first limiting grooves 21. Even if the locking part 31 fails to be directly clamped into the first limiting grooves 21 but abuts against the protrusions between the first limiting grooves 21, with the help of the rotational inertia of the rotating part 2, the locking part 31 can also quickly find at least one limiting groove for clamping.

[0063] In one embodiment of the present invention, the iron core includes a stator 11, a mover 12 and a second elastic member 4, and there is a movable gap 6 between the stator 11 and the mover 12. When the brake is in a braking state, the second elastic member 4 can push the mover 12 to contact the rotating part 2 in the movable gap 6 for braking.

[0064] In the above technical solution, the movable gap 6 is located between the stator 11 and the mover 12, providing space for the compression and extension of the second elastic member 4, so that after the stator winding 112 is powered off, it is ensured that the mover 12 can contact the friction plate 22 on the rotating part 2 under the elastic force of the second elastic member 4, so as to achieve the switching from the brake release state to the brake state. When the brake is in the brake release state, the stator winding 112 is powered on to generate a magnetic attraction force on the mover 12. The mover 12 moves toward the stator 11 under the magnetic attraction force to compress the movable gap 6, thereby compressing the second elastic member 4, so that the second elastic member 4 converts the pressure into elastic potential energy, and at the same time the mover 12 is separated from the friction plate 22, so that the rotating part 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, due to the elastic nature of the second elastic member 4 itself, the second elastic member 4 stretches to convert the elastic potential energy into an elastic force on the mover 12, thereby pushing the mover 12 toward the rotating part 2, causing the mover 12 to contact the friction plate 22 and thereby achieve a braking effect on the rotating part 2.

[0065] In one embodiment of the present invention, the core includes a stator 11 and a mover 12 . The mover 12 is provided with a second limiting groove 123 . The stator 11 is provided with a limiting portion 113 . The limiting portion 113 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 guidance of the mover 12 is achieved to ensure that when the mover 12 is installed on the stator 11, the hole positions and the connecting parts between the mover 12 and the stator 11 can be aligned with each other; on the other hand, it also has a certain anti-rotation effect on the mover 12, preventing the mover 12 from being braked by the rotating part 2, and preventing the rotating part 2 from driving the mover 12 to rotate together, causing the locking structure to shift.

[0067] In one embodiment of the present invention, 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 carry the iron core and the rotating part 2, and axially align the iron core and the rotating part 2, so that the iron core can better brake and stop the rotating part 2. The rotating part 2 is fixed to the rotating shaft 5 by a connecting key, so that the mover 12 can brake the rotating shaft 5 through friction with the rotating part 2.

[0069] In one embodiment of the present invention, the brake includes a first elastic member 32, a second elastic member 4 and a limiting portion 113, and a plurality of first elastic members 32, a plurality of second elastic members 4 and a plurality of limiting portions 113 are all located on the outer periphery of the stator 11 and arranged at intervals along the circumferential direction.

[0070] In the above technical solution, multiple first elastic members 32 are distributed along the circumference, so as to cooperate with multiple locking parts 31 to realize multi-point locking and stopping. Compared with the solution of locking and limiting with a single first elastic member 32 and a locking part 31, the multi-point locking and stopping improves the stability and reliability of the circumferential stopping and limiting, and avoids the deflection of the mover 12 caused by a single point force. Multiple second elastic members 4 are evenly distributed along the circumference, which can ensure that the pressure-applying part 122 of the mover 12 can contact the friction plate 22 at all places when entering the braking state, and avoid the single second elastic member 4 pushing the mover 12 into the braking position in a deflected posture, resulting in the mover 12 and the friction plate 22 having a partial contact braking, thereby reducing the probability of damage to the friction plate 22 and improving the life and reliability of the brake. The plurality of limiting portions 113 are distributed along the circumferential direction. Inserting the plurality of limiting portions 113 into the corresponding second limiting grooves 123 can further improve the accuracy of the limiting portions 113 in guiding the mover 12 , and can also further improve the anti-rotation effect of the limiting portions 113 on the mover 12 .

[0071] In one embodiment of the present invention, a third mounting groove 114 is provided on the stator 11 , one end of the second elastic member 4 is disposed in the third mounting groove 114 , and the other end thereof is in contact with the mover 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 failure of the second elastic member 4 resulting in the inability of the mover 12 to reach the braking position normally under the action of the elastic force, thereby 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 evenly transmit the elastic force to the mover 12 along the third mounting groove 114, pushing the mover 12 to approach the friction plate 22 to achieve braking, avoiding the uneven transmission of the elastic force resulting in partial contact braking between the mover 12 and the friction plate 22, and improving the life and braking effect of the brake.

[0073] In one embodiment of the present invention, 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, in order to ensure that the locking portion 31 can be fully inserted into the first limiting groove 21 in the braking state, forming a stable physical clamping limit. This design can prevent the problem that the portion of the locking portion 31 that is clamped 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 anti-rotation performance and reliability.

[0075] See also Figures 1 to 11 As shown, the present invention further provides a motor, comprising a brake, and the brake is the brake in the above embodiment.

[0076] In the above technical solution, by adopting the brake of the present invention, the motor can always keep the rotating part 2 locked when subjected to a sudden increase in load or external force impact, thereby avoiding the problem of the rotating part 2 being forced to rotate under braking, causing the friction plate 22 to break and thus causing damage and failure of the brake.

[0077] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: the iron core is used to carry the locking structure and can also drive the locking part 31 to achieve the extension and retraction action. The rotating part 2 usually refers to the hub part connected to the rotating shaft of the motor, and the rotating part 2 rotates with the rotating shaft of the motor. The locking part 31 cooperates with the first limiting groove 21 to achieve physical clamping and limiting of the rotating part 2 to prevent the rotating part 2 from rotating. The brake provided by the present invention, by setting the locking structure and the first limiting groove 21, extends the locking part 31 from the iron core and snaps into the first limiting groove 21 on the rotating part 2 after the rotating part 2 stops, so that the rotating part 2 remains in a locked state, avoiding the motor shaft from being forced to rotate after being subjected to a sudden increase in load or external force impact, resulting in the friction plate being broken and the brake being damaged and failing, thereby improving the reliability and life of the brake.

[0078] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0079] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A brake, characterized in that: The invention comprises an iron core, a rotating part (2) and a locking structure, wherein the locking structure is arranged in the iron core, a first limiting groove (21) is arranged on a side of the rotating part (2) facing the iron core, and the locking structure comprises a locking part (31). The iron core can drive the locking part (31) to extend from the iron core or be retracted into the iron core. When the brake is in a braking state, the locking part (31) extends from the iron core and is clamped in the first limiting groove (21) to circumferentially limit the rotating part (2). When the brake is in a brake release state, the locking part (31) is retracted from the first limiting groove (21) into the iron core.

2. The brake according to claim 1, characterized in that The iron core comprises a stator (11) and a mover (12), a first mounting groove (121) being arranged in the mover (12), the locking portion (31) being arranged in the first mounting groove (121), the locking structure further comprising a connecting member, one end of the connecting member being connected to the locking portion (31), and the other end being connected to the stator (11), the locking portion (31) being a lever structure, when the brake is in a braking state, the connecting member pulls the first end of the locking portion (31) to move in the direction of the stator (11), and the second end of the locking portion (31) moves in the direction of the mover (12) under the action of the lever and extends into the first limiting groove (21) to circumferentially limit the rotating portion (2).

3. The brake according to claim 2, characterized in that The stator (11) is provided with a second installation groove (111); one end of the connecting member is connected to the locking portion (31), and the other end is arranged in the second installation groove (111).

4. The brake according to claim 3, characterized in that The connecting member comprises a connecting rod or a first elastic member (32).

5. The brake according to claim 4, characterized in that 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), the first end of the first rotating section (311) is connected to the first elastic member (32), the second end of the first rotating section (311) is connected to 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 according to claim 5, characterized in that The locking portion (31) further comprises a third rotating section (313), a first end of the third rotating section (313) being connected to a second end of the second rotating section (312), and a second end of the third rotating section (313) being clamped in the first limiting groove (21); when the brake is in a brake release state, the first rotating section (311) extends in a horizontal direction, the second rotating section (312) extends in a direction away from the first rotating section (311), and the third rotating section (313) extends in a direction away from the first rotating section (311) and the second rotating section (312).

7. The brake according to claim 2, characterized in that A connecting groove (124) is provided on the surface of the mover (12) facing the rotating part (2), and the second end of the locking part (31) passes through the connecting groove (124) to engage and limit the first limiting groove (21).

8. The brake according to claim 2, characterized in that A friction plate (22) is provided on one side of the rotating part (2) facing the iron core, and a pressure-applying part (122) is provided on the mover (12). When the brake is in a braking state, the pressure-applying part (122) contacts the friction plate (22).

9. The brake according to claim 1, characterized in that The thickness of the locking portion (31) is smaller than the width of the first limiting groove (21).

10. The brake according to claim 2, characterized in that A friction plate (22) is arranged on one side of the rotating part (2) facing the iron core, an axial hole is arranged at the center of the mover (12), and a plurality of the first limiting grooves (21) are arranged at intervals along the circumferential direction on the surface between the friction plate (22) and the axial hole.

11. The brake according to claim 1, characterized in that The iron core comprises a stator (11), a mover (12) and a second elastic member (4); a movable gap (6) is provided between the stator (11) and the mover (12); when the brake is in a braking state, the second elastic member (4) can push the mover (12) in the movable gap (6) to contact and brake the rotating part (2).

12. The brake according to claim 1, characterized in that The iron core comprises a stator (11) and a mover (12); the mover (12) is provided with a second limiting groove (123); the stator (11) is provided with a limiting portion (113); the limiting portion (113) is inserted into the second limiting groove (123).

13. The brake according to claim 1, characterized in that The brake also includes a rotating shaft (5), and the rotating part (2) and the iron core are sleeved on the rotating shaft (5).

14. The brake according to claim 2, characterized in that The brake comprises a first elastic member (32), a second elastic member (4) and a limiting portion (113); a plurality of the first elastic members (32), a plurality of the second elastic members (4) and a plurality of the limiting portions (113) are all located on the outer periphery of the stator (11) and are arranged at intervals along the circumferential direction.

15. The brake according to claim 1, characterized in that The iron core comprises a stator (11) and a mover (12), a first mounting groove (121) being arranged in the mover (12), the locking portion (31) being arranged in the first mounting groove (121), and the locking structure further comprises an electromagnetic control unit, the electromagnetic control unit being arranged in the first limiting groove (21), and when the brake is in a braking state, the electromagnetic control unit can, after the rotating portion (2) stops rotating, use a magnetic force to make the locking portion (31) extend into the first limiting groove (21) to circumferentially limit the rotating portion (2).

16. A motor, characterized in that: It comprises a brake, wherein the brake is the brake according to any one of claims 1 to 15.

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