brake

Abstract

The application provides a brake, belonging to the technical field of mechanical braking, comprising: an outer rotor shell; an iron core arranged in the inner part of the outer rotor shell; a coil arranged in the outer part of the iron core; a claw pole assembly arranged in the inner part of the outer rotor shell and surrounding the coil; a permanent magnet fixed to the inner wall of the outer rotor shell, with a first magnetic surface arranged adjacent to the claw pole assembly; a magnetic conducting assembly arranged adjacent to a second magnetic surface, comprising a plurality of magnetic conducting blocks arranged at intervals; and a magnetic conducting brake pad arranged adjacent to the magnetic conducting assembly. A brake loop is formed in the braking state, and a short circuit loop is formed in the releasing state. When the coil is powered, the claw pole assembly drives the permanent magnet and the outer rotor shell to rotate, so as to switch the braking state and the releasing state; when the coil is powered off, the permanent magnet and the outer rotor shell remain in the braking state or the releasing state; when emergency is needed, the outer rotor shell is manually rotated, so as to switch the braking state and the releasing state.

Description

Technical Field

[0001] This application belongs to the field of mechanical braking technology, specifically relating to a brake. Background Technology

[0002] Existing brakes include various structural types. Most brake structures include a stator, armature, coil, elastic element, friction disc, etc. The elastic force of the elastic element and the magnetic force generated by the energized coil are used to make the armature displace relative to the stator, thereby directly or indirectly putting the friction disc into a braking state or a release state.

[0003] When the coil is energized, the friction disc is in a released state. When the coil is de-energized, the friction disc is in a braking state. This energizing process requires a lot of electrical energy to maintain the released state, and prolonged energizing will cause the coil to heat up. Utility Model Content

[0004] The purpose of this application is to provide a brake that solves the technical problem in the prior art that the coil needs to consume a lot of electrical energy during the energization process and that the coil will heat up if it is energized for a long time.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: This application provides a brake, comprising: an outer rotor housing; an iron core disposed inside the outer rotor housing; a coil disposed outside the iron core; a claw pole assembly disposed inside the outer rotor housing and surrounding the coil; a permanent magnet fixed to the inner wall of the outer rotor housing, the permanent magnet having a first magnetic surface and a second magnetic surface in the axial direction, the first magnetic surface having a plurality of alternately arranged S poles and N poles, the first magnetic surface being disposed adjacent to the claw pole assembly, the second magnetic surface having a plurality of alternately arranged S poles and N poles; a magnetically conductive assembly disposed adjacent to the second magnetic surface, the magnetically conductive assembly including a plurality of spaced magnetically conductive blocks; and a magnetically conductive brake pad disposed adjacent to the magnetically conductive assembly. In the braking state, multiple magnetic blocks are aligned with the multiple S and N poles of the second magnetic surface to form multiple braking circuits from the permanent magnet, one magnetic block, the magnetic brake pad, an adjacent magnetic block to the permanent magnet; in the releasing state, multiple magnetic blocks are misaligned with the multiple S and N poles of the second magnetic surface to form multiple short-circuit circuits from the permanent magnet, one magnetic block to the permanent magnet. When the coil is energized, the claw pole assembly drives the permanent magnet and the outer rotor housing to rotate, thereby switching between the braking state and the release state; when the coil is de-energized, the permanent magnet and the outer rotor housing maintain the braking state or the release state; when an emergency is required, the outer rotor housing can be manually rotated to switch between the braking state and the release state.

[0006] In some possible implementations, the outer rotor housing includes a cover and a rotor, the cover being connected to the rotor; wherein the permanent magnet is fixed to the inner wall of the rotor.

[0007] In some possible implementations, the magnetically conductive assembly further includes a support plate on which a plurality of magnetically conductive blocks are disposed; the support plate, the claw pole assembly, and the iron core are connected together by an assembly fitting.

[0008] In some possible implementations, the support plate, the iron core, the claw pole assembly, and the rotor are provided with mounting members that extend from the rotor and are configured to be mounted to a target device.

[0009] In some possible implementations, the rotor has a limiting slot, the mounting member extends from the limiting slot, and the mounting member is fitted with a limiting ring located within the limiting slot, which can be moved and limited within the limiting slot when the rotor rotates.

[0010] In some possible implementations, the claw pole assembly includes a first claw pole and a second claw pole, wherein a plurality of claw pole pieces of the first claw pole are parallel to the permanent magnet and the first claw pole is entirely located at the axial end of the permanent magnet on the first magnetic surface; the second claw pole is partially located at the axial end of the permanent magnet on the second magnetic surface, and a plurality of claw pole pieces of the second claw pole pass through the central hole of the permanent magnet and are bent into an orientation parallel to the permanent magnet.

[0011] In some possible implementations, the arrangement of the S and N poles of the first magnetic surface is asymmetrical with that of the second magnetic surface.

[0012] In some possible implementations, on the first magnetic surface, the extension of the boundary line between adjacent S poles and N poles deviates from the radial line of the permanent magnet; on the second magnetic surface, the extension of the boundary line between adjacent S poles and N poles deviates from the radial line of the permanent magnet.

[0013] In some possible implementations, the magnetically conductive assembly further includes a support plate, on which a plurality of magnetically conductive blocks are disposed, and each magnetically conductive block extends through the axial direction of the support plate, with the two end faces of each magnetically conductive block being disposed adjacent to the permanent magnet and the magnetically conductive brake pad, respectively.

[0014] In some possible implementations, the support plate has multiple mounting slots, and multiple magnetic blocks are respectively disposed through the multiple mounting slots. Each magnetic block has a connecting post on its side, and the connecting post is connected to the support plate from an area outside the mounting slot.

[0015] The brake provided in this application has at least the following technical advantages compared with the prior art: The brake provided in this application embodiment uses an iron core, coil, and claw pole assembly to provide a changing magnetic field. In the braking state, multiple magnetic blocks are aligned with the positions of multiple S and N poles of the second magnetic surface, forming multiple braking circuits from the permanent magnet, a magnetic block, a magnetic brake pad, an adjacent magnetic block to the permanent magnet. In the release state, multiple magnetic blocks are misaligned with the positions of multiple S and N poles of the second magnetic surface, forming multiple short-circuit circuits from the permanent magnet, a magnetic block to the permanent magnet. When the coil is energized, the claw pole assembly drives the permanent magnet and the outer rotor housing to rotate, switching between the braking and release states. When the coil is de-energized, the permanent magnet and the outer rotor housing remain in either the braking or release state. In case of emergency, the outer rotor housing can be manually rotated to switch between the braking and release states.

[0016] The brake provided in this application embodiment can be customized to either brake state or release state when power is off. Since the power-on process is only for switching between the brake circuit and the short-circuit circuit, the state controlled by power-off can be adjusted by simply adjusting the initial position of the permanent magnet and the outer rotor housing relative to the magnetic conductive assembly and the magnetic conductive brake pad.

[0017] The brake provided in this application embodiment adopts a structural design of claw pole assembly, permanent magnet, magnetic conductive assembly and magnetic brake pad. It only needs to be energized during state transition, and the power consumption is extremely small. This avoids the heat generated by the coil being energized for a long time. It does not consume any power when maintaining the state, which greatly saves energy and can meet the application needs of different occasions.

[0018] The brake provided in this application embodiment integrates the switching function of electric rotation and manual rotation. On the one hand, the braking state and the release state can be switched by energizing and de-energizing the coil. On the other hand, the outer rotor housing can be manually rotated to switch the braking state and the release state in case of power failure or other emergencies. Compared with the traditional release handle, it greatly reduces the space occupied, reduces the weight of the product, and is easy to operate in small space environments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is an external schematic diagram of a brake provided in one embodiment of this application; Figure 2 for Figure 1 The brake shown is a three-dimensional cross-sectional view with the mounting components omitted. Figure 3 for Figure 1 An exploded schematic diagram of the brake shown. Figure 4 for Figure 1 A schematic diagram showing the assembly of the brake's core, coil, and claw pole components; Figure 5 for Figure 1 A schematic diagram showing the assembly of the brake's core, coil, claw pole assembly, and permanent magnet. Figure 6 for Figure 1 The diagram shows the interaction of the permanent magnet, the magnetic conductive assembly, and the magnetically conductive brake pads when the brake is in braking mode. Figure 7 for Figure 1 The diagram shows the interaction of the permanent magnet, the magnetic conductive assembly, and the magnetically conductive brake pads when the brake is in the released state. Figure 8 for Figure 1 A perspective view of the permanent magnet of the brake shown. Figure 9 for Figure 1 A schematic diagram of the magnetic conductive assembly of the brake shown. Figure 10 for Figure 9 An exploded view of the magnetically conductive component shown. Figure 11 for Figure 9 A schematic diagram of the structure of the magnetic block of the magnetic conductive assembly shown; Figure 12 for Figure 1 A schematic diagram of the interaction between the rotor and the permanent magnet of the brake shown; Figure 13 for Figure 1 The diagram shows the fit between the limiting ring and the limiting groove of the brake.

[0021] Explanation of reference numerals in the attached figures: 1. Brake; 10. Outer rotor housing; 11. Cover; 111. First snap-fit ​​part; 12. Rotor; 121. Second snap-fit ​​part; 122. Limiting slot; 123. Fixing part; 20. Iron core; 30. Coil; 40. Claw pole assembly; 41. First claw pole; 42. Second claw pole; 50. Permanent magnet; 51. First magnetic surface; 52. Second magnetic surface; 60. Magnetic guide assembly; 61. Magnetic guide block; 611. Connecting post; 612. Blind hole; 62. Support plate; 621. Mounting slot; 70. Magnetic guide brake pad; 80. Assembly part; 90. Mounting part; 100. Limiting ring; 110. Transmission gear; C1. Brake circuit; C2. Short circuit circuit; a. Rotation angle. Detailed Implementation

[0022] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0023] It should be noted that when an element is referred to as "fixed to," "fixed," "connected to," "connected to," "set on," "set on," or "fixed to" another element, an intervening element may or may not be present. Furthermore, when an element is referred to as "connected to" or "connected to" another element, it can be interpreted, according to the conventional understanding of those skilled in the art, as a mechanical connection, electrical connection, communication connection, etc. In this document, "multiple" refers to two or more items; "several" refers to one or more items.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] Please refer to the following: Figures 1 to 13 The brake provided in the embodiments of this application will now be described.

[0026] Please see Figures 1 to 8This application provides a brake 1, comprising: an outer rotor housing 10; an iron core 20 disposed inside the outer rotor housing 10; a coil 30 disposed outside the iron core 20; a claw pole assembly 40 disposed inside the outer rotor housing 10 and surrounding the coil 30; a permanent magnet 50 fixed to the inner wall of the outer rotor housing 10, the permanent magnet 50 having a first magnetic surface 51 and a second magnetic surface 52 in the axial direction, the first magnetic surface 51 having a plurality of alternately arranged S poles and N poles, the first magnetic surface 51 being disposed adjacent to the claw pole assembly 40, the second magnetic surface 52 having a plurality of alternately arranged S poles and N poles; a magnetically conductive assembly 60 disposed adjacent to the second magnetic surface 52, the magnetically conductive assembly 60 including a plurality of spaced magnetically conductive blocks 61; and a magnetically conductive brake pad 70 disposed adjacent to the magnetically conductive assembly 60. It is understood that both the magnetically conductive assembly 60 and the magnetically conductive brake pad 70 are disposed inside the outer rotor housing 10.

[0027] In the braking state, multiple magnetic blocks 61 are aligned with the multiple S and N poles of the second magnetic surface 52, forming multiple braking circuits C1 from the permanent magnet 50, a magnetic block 61, a magnetic brake pad 70, an adjacent magnetic block 61 to the permanent magnet 50, and the brake pad 70 cannot rotate. In the released state, multiple magnetic blocks 61 are misaligned with the multiple S and N poles of the second magnetic surface 52, forming multiple short-circuit circuits C2 from the permanent magnet 50, a magnetic block 61 to the permanent magnet 50, and the brake pad 70 can rotate freely.

[0028] When the coil 30 is energized, the claw pole assembly 40 drives the permanent magnet 50 and the outer rotor housing 10 to rotate, thereby switching between the braking state and the release state; when the coil 30 is de-energized, the permanent magnet 50 and the outer rotor housing 10 remain in the braking state or the release state; when an emergency is required, the outer rotor housing 10 can be manually rotated to switch between the braking state and the release state.

[0029] Specifically, the iron core 20 and the coil 30 are located within the enclosed space formed by the claw pole assembly 40. When the coil 30 is energized, it generates a magnetic field, which can magnetize the claw pole assembly 40. The permanent magnet 50 has a double-sided radial magnetization structure, with the first magnetic surface 51 and the second magnetic surface 52 having an equal number of magnetic poles. The magnetically conductive assembly 60 includes multiple magnetically conductive blocks 61, which are made of magnetically conductive material. The magnetically conductive brake pad 70 is also made of magnetically conductive material.

[0030] The coil 30 receives currents in different directions, causing the claw pole assembly 40 to generate a changing magnetic field, driving the permanent magnet 50 to rotate in the forward or reverse direction. When the direction of the current input to the coil 30 is changed, the direction of the magnetic field generated by the claw pole assembly 40 is reversed. That is, assuming that in the forward direction, when the permanent magnet 50 and the outer rotor housing 10 rotate to the target position, the S and N poles of the first magnetic surface 51 of the permanent magnet 50 correspond to the N and S poles formed by the magnetization of the claw pole assembly 40, respectively. At this time, if it is necessary to switch the braking circuit... Based on the principle of like poles repelling and unlike poles attracting, C1 and short-circuit circuit C2 require changing the direction of the current so that the claw pole assembly 40 is magnetized to form S pole and N pole. At this time, since the S pole and N pole of the first magnetic surface 51 correspond to the S pole and N pole of the claw pole assembly 40 respectively, the permanent magnet 50 rotates and synchronously drives the outer rotor housing 10 to rotate. When the rotation reaches the N pole and S pole of the claw pole assembly 40 corresponding to the S pole and N pole of the first magnetic surface 51 respectively, the switching between braking circuit C1 and short-circuit circuit C2 is completed.

[0031] The brake 1 provided in this application embodiment controls the energizing time according to the overall volume and number of magnetic poles of the brake 1 when switching between the brake circuit C1 and the short circuit circuit C2. For example, the energizing time can be set to 0.5 seconds to ensure that the permanent magnet 50 can rotate completely into position. Generally, the larger the overall volume, the longer the energizing time required, and the more magnetic poles there are, the shorter the energizing time required.

[0032] The brake 1 provided in this application embodiment has at least the following technical effects compared with the prior art: The brake 1 provided in this embodiment provides a core 20, a coil 30, and a claw pole assembly 40 to provide a changing magnetic field. In the braking state, multiple magnetic blocks 61 are aligned with the multiple S and N poles of the second magnetic surface 52, forming multiple braking circuits C1 from the permanent magnet 50, a magnetic block 61, a magnetic brake pad 70, an adjacent magnetic block 61, to the permanent magnet 50. In the release state, the multiple magnetic blocks 61 are misaligned with the multiple S and N poles of the second magnetic surface 52, forming multiple short-circuit circuits C2 from the second magnetic surface 52, a magnetic block 61, to the second magnetic surface 52. When the coil 30 is energized, the claw pole assembly 40 drives the permanent magnet 50 and the outer rotor housing 10 to rotate, switching between the braking and release states. When the coil 30 is de-energized, the permanent magnet 50 and the outer rotor housing 10 remain in either the braking or release state. In case of emergency, the outer rotor housing 10 can be manually rotated to switch between the braking and release states.

[0033] The brake 1 provided in this application embodiment can be customized to be in a braking state or a release state when the power is off. Since the power-on process is only to switch the brake circuit C1 and the short-circuit circuit C2, the state controlled by the power-off can be adjusted by simply adjusting the initial position of the permanent magnet 50 and the outer rotor housing 10 relative to the magnetic conductive assembly 60 and the magnetic conductive brake pad 70.

[0034] The brake 1 provided in this embodiment adopts a structural design of claw pole assembly 40, permanent magnet 50, magnetic conductive assembly 60 and magnetic conductive brake pad 70. It only needs to be energized when the state changes, and the power consumption is very small. This avoids the heat generated by the coil 30 being energized for a long time. It does not need to consume any power when maintaining the state, which greatly saves energy and can meet the application needs of different occasions.

[0035] The brake 1 provided in this application embodiment integrates the switching function of electric rotation and manual rotation. On the one hand, the braking state and the release state can be switched by energizing and de-energizing the coil 30. On the other hand, the outer rotor housing 10 can be manually rotated to switch the braking state and the release state in case of power failure or other emergencies. Compared with the traditional release handle, it greatly reduces the space occupied, reduces the weight of the product, and is easy to operate in a small space environment.

[0036] Furthermore, the brake 1 provided in this embodiment may also include a transmission gear 110, which is adapted to the inner ring of the magnetic brake pad 70, and a transmission relationship is achieved with the brake shaft of the target device through the transmission gear 110. Of course, in other embodiments, the brake 1 may not include the transmission gear 110, and a transmission relationship can be achieved with the brake shaft of the target device by forming a specific shape of the adapter hole in the magnetic brake pad 70.

[0037] The following examples illustrate the structures such as the outer rotor housing 10, claw pole assembly 40, permanent magnet 50, and magnetic conductive assembly 60, but are not limited to the following embodiments.

[0038] Please see Figures 1 to 3 In some embodiments, the outer rotor housing 10 includes a cover 11 and a rotor 12, with the cover 11 connected to the rotor 12; wherein, a permanent magnet 50 is fixed to the inner wall of the rotor 12. Specifically, the cover 11 has a first snap-fit ​​portion 111, and the rotor 12 has a second snap-fit ​​portion 121. The cover 11 and the rotor 12 are connected together by the snap-fit ​​engagement of the first snap-fit ​​portion 111 and the second snap-fit ​​portion 121. For example, the first snap-fit ​​portion 111 can be a hole structure, and the second snap-fit ​​portion 121 can be a protrusion structure; or, for example, the first snap-fit ​​portion 111 can be a protrusion structure, and the second snap-fit ​​portion 121 can be a hole structure. Of course, the cover 11 and the rotor 12 can also be connected together by threaded connection, welding, riveting, binding, etc., without specific limitations.

[0039] The permanent magnet 50 and the rotor 12 can be connected together by means of threaded connection, welding, riveting, binding, etc., without specific restrictions. In order to make the connection between the permanent magnet 50 and the rotor 12 more reliable, a step can be set on the inner wall of the rotor 12, and the outer peripheral edge of the permanent magnet 50 is placed on the step, thereby increasing the contact area.

[0040] In addition, a fixing part 123 is provided at the center of the rotor 12, and the iron core 20 is sleeved on the fixing part 123. There is a gap between the iron core 20 and the fixing part 123, which allows the rotor 12 to rotate freely.

[0041] Please see Figure 2 , Figure 3 and Figure 9 In some embodiments, the magnetically conductive assembly 60 further includes a support plate 62, on which multiple magnetically conductive blocks 61 are disposed. The support plate 62, the claw pole assembly 40, and the iron core 20 are connected together by an assembly 80. The support plate 62 is made of a non-magnetic material, and the magnetically conductive blocks 61 and the support plate 62 can be connected together by riveting, welding, threaded connection, etc. The assembly 80 makes the support plate 62, the claw pole assembly 40, and the iron core 20 form a whole. The assembly 80 can be a single screw, a single bolt, a single pin, a pair of screws, a pair of bolts, a pair of pins, etc. For example, when a pair of bolts is used, one bolt passes through the support plate 62 and the second claw pole 42 in the claw pole assembly 40 and locks it in the iron core 20, while the other bolt passes through the first claw pole 41 in the claw pole assembly 40 and locks it in the iron core 20.

[0042] Please see Figure 2 and Figure 3 In some embodiments, a mounting member 90 is provided through the support plate 62, claw pole assembly 40, iron core 20, and rotor 12. The mounting member 90 extends from the rotor 12 and is configured to be installed onto the target device. Specifically, the mounting member 90 can be a screw, bolt, pin, etc., to facilitate the installation of the brake 1 onto the target device. Since the support plate 62, claw pole assembly 40, and iron core 20 form a compact whole, and since the cover 11 is adjacent to the magnetically conductive brake pad 70, the mounting member 90 is sequentially passed through the support plate 62, the second claw pole 42 in the claw pole assembly 40, the iron core 20, the first claw pole 41 in the claw pole assembly 40, and the rotor 12. This arrangement achieves the overall compactness and coordination of the brake 1.

[0043] Please see Figure 2 , Figure 3 , Figure 12 and Figure 13In some embodiments, the rotor 12 has a limiting groove 122, from which the mounting member 90 extends. The mounting member 90 is fitted with a limiting ring 100, which is located within the limiting groove 122 and can be moved and limited within the limiting groove 122 when the rotor 12 rotates. Specifically, the bottom of the rotor 12 has a limiting groove 122, and the limiting ring 100 is fitted around the outer ring of the mounting member 90. This reduces wear on the mounting member 90 and improves the overall structural compactness.

[0044] The limiting ring 100 is located within the limiting slot 122. When the rotor 12 rotates, since the mounting part 90 and the limiting ring 100 are fixed, the limiting ring 100 can move relative to the limiting slot 122. When it moves to the two ends of the limiting slot 122, it restricts the rotational movement of the rotor 12, thus completing the switching between the brake circuit C1 and the short-circuit circuit C2. Based on this, the switching between energized and de-energized states can be indicated.

[0045] By changing the current direction of the input coil 30, the claw pole assembly 40 can generate a changing magnetic field, thereby causing the permanent magnet 50 and the outer rotor housing 10 to rotate in the forward or reverse direction. The final angle of the forward and reverse rotation is limited by the abutting relationship between the two ends of the limiting ring 100 and the limiting long groove 122, thus completing the switching between the brake circuit C1 and the short circuit circuit C2.

[0046] like Figure 13 As shown, by designing the dimensions of the limiting slot 122 and the number of magnetic poles mentioned above, the rotation angle α of the rotor 12 can be determined. The more magnetic poles there are, the smaller the rotation angle α will be. By rotating a smaller angle, the brake circuit C1 and the short circuit circuit C2 can be switched. For example, the maximum rotation angle α does not exceed 45°.

[0047] Please see Figures 3 to 5 In some embodiments, the claw pole assembly 40 includes a first claw pole 41 and a second claw pole 42. The plurality of claw pole pieces of the first claw pole 41 are parallel to the permanent magnet 50, and the first claw pole 41 is entirely located at the axial end of the permanent magnet 50 on the first magnetic surface 51. The second claw pole 42 is partially located at the axial end of the permanent magnet 50 on the second magnetic surface 52, and the plurality of claw pole pieces of the second claw pole 42 pass through the central hole of the permanent magnet 50 and are bent into an attitude parallel to the permanent magnet 50.

[0048] Specifically, the first claw pole 41 and the second claw pole 42 have the same number of claws, are staggered, and are evenly distributed along the circumference. Multiple claw pole pieces of the second claw pole 42 pass through the central hole of the permanent magnet 50 and bend outwards at 90°. Thus, multiple claw pole pieces of the first claw pole 41 and the second claw pole 42 are all located at the axial end of the first magnetic surface 51 of the permanent magnet 50. All claw pole pieces are arranged in an array around the center, and all claw pole pieces outside the central hole of the permanent magnet 50 are parallel to the first magnetic surface 51.

[0049] When the current direction of the input coil 30 is changed, the magnetism of the first claw pole 41 and the second claw pole 42 is opposite. That is, assuming that in the positive direction, the first claw pole 41 is magnetized as the S pole and the second claw pole 42 is magnetized as the N pole, when the permanent magnet 50 and the outer rotor housing 10 rotate to the target position, the S pole and N pole of the first magnetic surface 51 of the permanent magnet 50 correspond to the N pole of the second claw pole 42 and the S pole of the first claw pole 41, respectively. At this time, if it is necessary to switch the braking circuit C1 and the short-circuit circuit C2, based on the principle of like poles repelling and unlike poles... The principle of attraction requires changing the direction of the current so that the first claw pole 41 is magnetized as the N pole and the second claw pole 42 is magnetized as the S pole. At this time, since the S pole and N pole of the first magnetic surface 51 correspond to the S pole of the second claw pole 42 and the N pole of the first claw pole 41 respectively, the permanent magnet 50 rotates and synchronously drives the outer rotor housing 10 to rotate. When the rotation reaches the point where the S pole and N pole of the first magnetic surface 51 correspond to the N pole of the first claw pole 41 and the S pole of the second claw pole 42 respectively, the switching between the braking circuit C1 and the short-circuit circuit C2 is completed.

[0050] Of course, in other embodiments, the shapes of the first claw pole 41 and the second claw pole 42 may also be varied, as long as the magnetic force generated by the change of magnetic poles can make the permanent magnet 50 rotate.

[0051] Please see Figure 8 In some embodiments, the arrangement of the S and N poles of the first magnetic surface 51 is asymmetrical with that of the second magnetic surface 52. That is, during radial magnetization, the S and N poles of the first magnetic surface 51 are arranged sequentially, and correspondingly, the N and S poles of the second magnetic surface 52 are arranged sequentially. The S and N poles on the first magnetic surface 51 and the second magnetic surface 52 are arranged in opposite directions. This arrangement reduces the magnetization difficulty and facilitates achieving the desired magnetization effect.

[0052] Please see Figure 8In some embodiments, on the first magnetic surface 51, the extended lines of the boundary between adjacent S and N poles deviate from the radial lines of the permanent magnet 50; on the second magnetic surface 52, the extended lines of the boundary between adjacent S and N poles deviate from the radial lines of the permanent magnet 50. That is, on the first magnetic surface 51 and the second magnetic surface 52, the shape of each S pole and the shape of each N pole are asymmetrical structures, not axially symmetric with respect to the diameter of the permanent magnet 50, and not a standard sector shape. This arrangement allows the permanent magnet 50 to rotate more smoothly, thus facilitating its rotation.

[0053] Please see Figure 6 , Figure 7 , Figures 9 to 11 In some embodiments, the magnetically conductive assembly 60 further includes a support plate 62, on which multiple magnetically conductive blocks 61 are disposed, each magnetically conductive block 61 extending through the axial direction of the support plate 62. The two end faces of each magnetically conductive block 61 are respectively adjacent to the permanent magnet 50 and the magnetically conductive brake pad 70. The support plate 62 is made of a non-magnetically conductive material, and the magnetically conductive blocks 61 and the support plate 62 can be connected together by riveting, welding, threaded connection, or other methods.

[0054] The magnetic block 61 needs to penetrate the axial direction of the support plate 62, so that the two end faces of the magnetic block 61 can be arranged adjacent to the permanent magnet 50 and the magnetic brake pad 70 respectively, to ensure the reliability of the circuit. In this embodiment, the support plate 62 can ensure the positional reliability of the multiple magnetic blocks 61, ensuring that the relative positions of the multiple magnetic blocks 61 will not shift.

[0055] Please see Figures 9 to 11 In some embodiments, the support plate 62 has multiple mounting slots 621, and multiple magnetic blocks 61 are respectively disposed through the multiple mounting slots 621. Each magnetic block 61 has a connecting post 611 on its side, and the connecting post 611 connects to the support plate 62 from an area outside the mounting slot 621. This arrangement can reduce the spatial interference of the connecting post 611 on the magnetic block 61 and ensure that the magnetic block 61 has a large magnetic linear density.

[0056] Specifically, the mounting groove 621 can be opened on the outer periphery of the support plate 62, and several connecting posts 611 can be set on the side of each magnetic block 61. Specifically, there can be one, two, three, four, five or more such posts. For example, four connecting posts 611 can be set. These four connecting posts 611 are arranged around the circumference of the magnetic block 61 and can be connected to the support plate 62 by riveting, welding, threaded connection or other means.

[0057] In order to reduce the spatial interference of the connecting post 611 on the magnetic brake pad 70, the connecting post 611 is connected to the support plate 62 from the end face of the support plate 62 away from the magnetic brake pad 70. Furthermore, the two ends of the connecting post 611 will not contact the permanent magnet 50 or the magnetic brake pad 70, thus ensuring the reliability and stability of the circuit.

[0058] In addition, the magnetic block 61 has two sloped sides and is also provided with blind holes 612, which can reduce the weight of the magnetic block 61.

[0059] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the specification has recorded each combined embodiment and can support different combined embodiments.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A brake, characterized in that, include: Outer rotor housing; The iron core is located inside the outer rotor housing; A coil is disposed outside the iron core; The claw pole assembly is located inside the outer rotor housing and surrounds the coil; A permanent magnet is fixed to the inner wall of the outer rotor housing. The permanent magnet has a first magnetic surface and a second magnetic surface in the axial direction. The first magnetic surface has a plurality of alternating S poles and N poles. The first magnetic surface is arranged adjacent to the claw pole assembly. The second magnetic surface has a plurality of alternating S poles and N poles. A magnetically conductive component is disposed adjacent to the second magnetic surface, and the magnetically conductive component includes a plurality of spaced magnetically conductive blocks; as well as A magnetically conductive brake pad is disposed adjacent to the magnetically conductive assembly; In the braking state, multiple magnetic blocks are aligned with the multiple S and N poles of the second magnetic surface to form multiple braking circuits from the permanent magnet, one magnetic block, the magnetic brake pad, an adjacent magnetic block to the permanent magnet; in the releasing state, multiple magnetic blocks are misaligned with the multiple S and N poles of the second magnetic surface to form multiple short-circuit circuits from the permanent magnet, one magnetic block to the permanent magnet. When the coil is energized, the claw pole assembly drives the permanent magnet and the outer rotor housing to rotate, thereby switching between the braking state and the release state; when the coil is de-energized, the permanent magnet and the outer rotor housing maintain the braking state or the release state; when an emergency is required, the outer rotor housing can be manually rotated to switch between the braking state and the release state.

2. The brake according to claim 1, characterized in that, The outer rotor housing includes a cover and a rotor, with the cover connected to the rotor; wherein the permanent magnet is fixed to the inner wall of the rotor.

3. The brake according to claim 2, characterized in that, The magnetic conductive assembly also includes a support plate, on which multiple magnetic conductive blocks are disposed; the support plate, the claw pole assembly, and the iron core are connected together by an assembly fitting.

4. The brake according to claim 3, characterized in that, The support plate, the iron core, the claw pole assembly, and the rotor are provided with mounting members that extend from the rotor and are configured to be installed in the target device.

5. The brake according to claim 4, characterized in that, The rotor has a limiting groove, the mounting component extends out of the limiting groove, and the mounting component is fitted with a limiting ring, which is located in the limiting groove and can be moved and limited in the limiting groove when the rotor rotates.

6. The brake according to claim 1, characterized in that, The claw pole assembly includes a first claw pole and a second claw pole. The plurality of claw pole pieces of the first claw pole are parallel to the permanent magnet, and the first claw pole is entirely located at the axial end of the permanent magnet on the first magnetic surface. The second claw pole is partially located at the axial end of the permanent magnet on the second magnetic surface, and the plurality of claw pole pieces of the second claw pole pass through the central hole of the permanent magnet and are bent into an attitude parallel to the permanent magnet.

7. The brake according to claim 1, characterized in that, The arrangement of the S and N poles of the first magnetic surface is asymmetrical with that of the second magnetic surface.

8. The brake according to claim 7, characterized in that, On the first magnetic surface, the extension of the boundary line between adjacent S poles and N poles deviates from the radial line of the permanent magnet; on the second magnetic surface, the extension of the boundary line between adjacent S poles and N poles deviates from the radial line of the permanent magnet.

9. The brake according to claim 1, characterized in that, The magnetic conductive assembly also includes a support plate, and a plurality of magnetic conductive blocks are disposed on the support plate. Each magnetic conductive block extends through the axial direction of the support plate, and the two end faces of each magnetic conductive block are respectively disposed adjacent to the permanent magnet and the magnetic brake pad.

10. The brake according to claim 9, characterized in that, The support plate has multiple mounting slots, and multiple magnetic blocks are respectively disposed through the multiple mounting slots. Each magnetic block has a connecting post on its side, and the connecting post is connected to the support plate from the area outside the mounting slot.

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