Electromagnetic brake, motor and barrier gate

Abstract

The utility model provides an electromagnetic brake, a motor and a barrier gate, and belongs to the technical field of barrier gate equipment. The electromagnetic brake comprises a magnetic attraction assembly and a brake assembly, the magnetic attraction assembly is installed on a shell of the electromagnetic brake, and the magnetic attraction assembly is provided with a first limiting part; the brake assembly is provided with a second limiting part matched with the first limiting part, one of the first limiting part and the second limiting part is a limiting convex part, and the other one is a limiting concave part; after the magnetic attraction assembly is powered on, the magnetic attraction assembly attracts the brake assembly to move in the axial direction of the rotating shaft, so that the limiting convex part and the limiting concave part are connected in a clamped mode, and rotation of the rotating shaft is stopped. According to the electromagnetic brake, the limiting convex part and the limiting concave part are mutually clamped, the friction slipping phenomenon is avoided, the braking performance of the electromagnetic brake can be effectively improved, particularly under the condition that the rotating shaft is subjected to large external force, due to the fact that the limiting convex part and the limiting concave part are mutually clamped and locked, the braking force of the electromagnetic brake is remarkably increased, and then braking failure can be effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of barrier gate equipment, specifically relating to an electromagnetic brake and motor, and a barrier gate. Background Technology

[0002] Motor braking is generally achieved through electromagnetic brakes. Existing electromagnetic brakes typically rely on surface-to-surface friction to brake the motor. When braking is required, the magnetic element of the electromagnetic brake is energized, generating magnetic force that attracts the brake element mounted on the motor shaft. The brake element and the magnetic element come into contact, and the friction generated through surface-to-surface contact brakes the motor shaft. However, when the motor shaft is subjected to significant external force, the braking force generated by surface-to-surface friction is relatively small, causing the brake element to fail to lock the motor shaft, potentially leading to brake failure. For example, when the motor is installed on a barrier gate or parking barrier at an entrance or exit, external force lifting the barrier can cause the motor braking to fail because the brake relies on surface-to-surface friction, resulting in the barrier failing to stop vehicles. Utility Model Content

[0003] In view of this, in order to solve the problems in the prior art, the first objective of this utility model is to provide an electromagnetic brake. The technical problem to be solved is: how to improve the braking performance of the electromagnetic brake and avoid the electromagnetic brake from failing when subjected to large external forces.

[0004] This utility model solves the above problems through the following technical means:

[0005] An electromagnetic brake, comprising:

[0006] A magnetic attraction assembly is installed on the housing of the electromagnetic brake, and the magnetic attraction assembly is provided with a first limiting part;

[0007] A braking assembly is connected to the rotating shaft of the electromagnetic brake. The rotating shaft is rotatably connected to the housing. The braking assembly rotates with the rotating shaft and is capable of moving along the axial direction of the rotating shaft under the action of an external force.

[0008] The brake assembly is provided with a second limiting part that cooperates with the first limiting part. In the first limiting part and the second limiting part, one of them is a limiting protrusion and the other is a limiting recess.

[0009] When the magnetic attraction component is powered on, it attracts the brake component and moves it along the axial direction of the rotating shaft, so that the limiting protrusion and the limiting recess engage with each other to prevent the rotation of the rotating shaft.

[0010] This electromagnetic brake features a magnetic attraction component with a first limiting part and a brake component with a second limiting part that mates with the first limiting part. One of the first and second limiting parts is a limiting protrusion, and the other is a limiting recess. When the magnetic attraction component is energized, it generates an attractive force, drawing the brake component and causing it to move axially along the shaft. The magnetic attraction component and the brake component come into contact, causing the limiting protrusion and limiting recess to engage, thereby preventing the shaft from rotating. This engagement of the limiting protrusion and limiting recess prevents slippage and effectively improves the braking performance of the electromagnetic brake. Especially when the shaft is subjected to significant external force, the locking and engaging of the limiting protrusion and limiting recess significantly increases the braking force, effectively preventing brake failure.

[0011] In the aforementioned electromagnetic brake, the magnetic suction assembly includes a magnetic suction member and a first limiting member. The magnetic suction member is connected to the first limiting member, the first limiting member is installed on the housing, and the first limiting part is disposed on the first limiting member.

[0012] The braking assembly includes a second limiting member and a braking member that is attracted to the magnetic member after being energized. The second limiting part is disposed on the second limiting member, the braking member is connected to the second limiting member, the second limiting member is installed on the rotating shaft, the second limiting member rotates with the rotating shaft and can move along the axial direction of the rotating shaft under the action of external force.

[0013] When the magnetic attractor is powered on, it attracts the brake and drives the second limiting member to move axially along the rotating shaft, so that the limiting protrusion and the limiting recess engage with each other.

[0014] In the aforementioned electromagnetic brake, the braking component is a metal component, and the second limiting component is a plastic or metal component, with the braking component and the second limiting component forming an integral structure.

[0015] In the aforementioned electromagnetic brake, the second limiting member is provided with a connecting portion and an extension portion extending outward in the circumferential direction along the connecting portion. The connecting portion is sleeved on the outside of the rotating shaft, the connecting portion rotates with the rotating shaft, and the connecting portion can move along the axial direction of the rotating shaft under the action of external force.

[0016] The brake member is provided on the side of the extension and / or the connecting portion facing the magnetic member, and the brake member is disposed opposite to the magnetic member; the second limiting portion is provided on the side of the extension facing the first limiting portion, and the second limiting portion and the first limiting portion are disposed opposite to each other.

[0017] In the aforementioned electromagnetic brake, the end of the extension is provided with a limiting ring, and a plurality of second limiting portions are uniformly arranged circumferentially on the side of the limiting ring facing the first limiting portion; the brake component is located between the limiting ring and the connecting portion;

[0018] The first limiting member has a limiting step on the side facing the extension, and the step surface of the limiting step has a plurality of first limiting parts along its circumference; the magnetic suction member is located between the limiting step and the connecting part.

[0019] In the aforementioned electromagnetic brake, the brake component includes a first brake portion and a second brake portion. The first brake portion is mounted on the side of the connecting portion facing the magnetic suction component, and the second brake portion is mounted on the extension portion. The second brake portion bends and extends towards the outer peripheral surface of the connecting portion to connect with the first brake portion.

[0020] The magnetic attractor includes an electromagnet core sleeved outside the rotating shaft. The electromagnet core includes a first magnetic attractor and a second magnetic attractor connected to each other. The first magnetic attractor is correspondingly arranged with the first braking part, and the second magnetic attractor is correspondingly arranged with the second braking part.

[0021] In the aforementioned electromagnetic brake, the electromagnet core has a receiving space, and the magnetic suction component further includes a coil sleeve located within the receiving space. The coil sleeve is sleeved on the outside of the brake component, and a coil is wound on the coil sleeve.

[0022] When the magnetic attractor is energized, the first magnetic attractor and the first brake part and / or the second magnetic attractor and the second brake part attract each other.

[0023] In one of the electromagnetic brakes described above, an elastic reset member is included, which is sleeved on the rotating shaft;

[0024] When the magnetic attractor is energized, it attracts the brake component and moves it along the axial direction of the rotating shaft, and compresses the elastic reset component.

[0025] After the magnetic suction component is de-energized, the elastic reset component pushes the brake assembly to move axially along the rotating shaft until it is reset.

[0026] In one of the electromagnetic brakes described above, the brake assembly is sleeved outside the rotating shaft and connected to the rotating shaft via a sliding structure. The sliding structure includes a groove and a slider that slides in cooperation with the groove.

[0027] In the aforementioned electromagnetic brake, a bushing is fixedly connected to the outside of the rotating shaft. The bushing is located between the rotating shaft and the brake assembly. The outer circumferential surface of the bushing is provided with the groove or the slider along its axial direction. Correspondingly, the inner circumferential surface of the brake assembly is provided with the slider or the groove along its axial direction.

[0028] The second objective of this utility model is to provide a motor:

[0029] An electric motor includes the electromagnetic brake described above, wherein the housing of the electromagnetic brake is the outer shell of the electric motor, and the rotating shaft is the output shaft of the electric motor.

[0030] This motor features the aforementioned electromagnetic brake, with the electromagnetic brake housing serving as the motor's outer shell and the electromagnetic brake's shaft acting as the motor's output shaft. When the magnetic attraction component is energized, it attracts the brake component, causing it to move axially along the shaft. This engages the limiting protrusion and limiting recess, preventing rotation of the motor's output shaft. Through the interlocking of the limiting protrusion and limiting recess, the motor significantly increases braking force under the same conditions, effectively preventing friction and slippage and improving braking performance. Even when the motor's output shaft is subjected to significant external force, the interlocking of the limiting protrusion and limiting recess effectively prevents brake failure.

[0031] The third objective of this utility model is to provide a barrier gate:

[0032] A barrier gate includes a drive motor and a gate arm, wherein the drive motor drives the gate arm to open or close, and the drive motor is the motor described above.

[0033] This barrier gate, through the aforementioned motor, engages with the limiting protrusion and limiting recess when the gate is closed and the magnetic traction assembly is energized. This locking mechanism prevents the motor output shaft from rotating, effectively braking the motor. Especially when significant external force is applied to the gate arm, the locking engagement significantly enhances the motor's braking force, effectively preventing motor braking failure and thus preventing the barrier gate from failing to stop vehicles. When the magnetic traction assembly is de-energized, the locking engagement between the limiting protrusion and limiting recess disengages, releasing the motor's braking force. Restarting the motor at this point will then drive the barrier gate to open.

[0034] Compared with the prior art, the advantages of this utility model are as follows:

[0035] This invention discloses an electromagnetic brake. A first limiting portion is provided on the magnetic attraction assembly, and a second limiting portion, which cooperates with the first limiting portion, is provided on the brake assembly. One of the first and second limiting portions is a limiting protrusion, and the other is a limiting recess. When the magnetic attraction assembly is energized, it attracts the brake assembly, causing the brake assembly to move axially along the shaft. This causes the limiting protrusion and the limiting recess to engage, thereby preventing the shaft from rotating. This application, through the interlocking of the limiting protrusion and the limiting recess, avoids friction and slippage, effectively improving the braking performance of the electromagnetic brake. Especially when the shaft is subjected to a large external force, the braking force of this application is significantly increased due to the interlocking of the limiting protrusion and the limiting recess, thus effectively preventing brake failure.

[0036] The motor of this invention includes the aforementioned electromagnetic brake, with the electromagnetic brake housing serving as the motor's outer shell and the electromagnetic brake shaft serving as the motor's output shaft. When the magnetic attraction assembly is energized, it attracts the brake assembly, causing the brake assembly to move axially along the shaft. This engages the limiting protrusion and limiting recess, thereby preventing rotation of the motor's output shaft. The motor of this application, through the interlocking engagement of the limiting protrusion and limiting recess, significantly increases braking force under the same conditions, effectively preventing frictional slippage and improving the motor's braking performance. Even when the motor's output shaft is subjected to a large external force, the interlocking engagement of the limiting protrusion and limiting recess effectively prevents motor braking failure.

[0037] The barrier gate of this utility model, by having the aforementioned motor, when the barrier gate is closed and the magnetic attraction component is energized, the limiting protrusion and the limiting recess engage with each other to prevent the rotation of the motor output shaft, thereby achieving effective braking of the motor. Especially when a large external force is applied to the gate arm, the engagement of the limiting protrusion and the limiting recess significantly improves the braking force of the motor, thereby effectively preventing motor braking failure and thus effectively preventing the barrier gate from failing to stop vehicles. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of an electromagnetic brake.

[0039] Figure 2 Exploded view of an electromagnetic brake

[0040] Figure 3 This is a cross-sectional view of an electromagnetic brake.

[0041] Figure 4 for Figure 3 Enlarged view of section A in the middle;

[0042] Figure 5 for Figure 3 Enlarged view of section B;

[0043] Figure 6 for Figure 3 Enlarged view of section C;

[0044] Figure 7 This is a schematic diagram of the magnetic attraction assembly.

[0045] Figure 8 This is a cross-sectional view of the magnetic assembly;

[0046] Figure 9 This is a schematic diagram of the brake assembly.

[0047] Figure 10 This is a schematic diagram of the bushing structure;

[0048] Figure 11 This is a schematic diagram of the motor structure;

[0049] Figure 12 This is an exploded view of the motor;

[0050] Figure 13 This is a cross-sectional view of the motor.

[0051] The meanings of the reference numerals in the attached figures are as follows:

[0052] 1. Electromagnetic brake; 11. Magnetic attraction assembly; 111. First limiting part; 112. Magnetic attraction element; 1121. Electromagnetic core; 1122. Second magnetic attraction part; 1123. First magnetic attraction part; 1124. Coil bushing; 1125. Accommodating space; 113. First limiting element; 1131. Limiting step; 12. Brake assembly; 121. Second limiting part; 122. Second limiting element; 1221. Connector 1222, Extension; 1223, Limiting ring; 1224, Snap-fitting platform; 123, Brake component; 1231, First brake part; 1232, Second brake part; 13, Housing; 14, Rotating shaft; 141, Snap ring; 142, Washer; 143, Annular groove; 15, Elastic reset component; 16, Bushing; 161, Slide groove; 162, Slider; 163, Abutment part; 2, Motor; 21, Rear cover. Detailed Implementation

[0053] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0054] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0055] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0056] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0057] 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 invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0058] Existing electromagnetic brakes typically brake motors through surface-to-surface contact friction. When braking is required, the magnetic attractor of the electromagnetic brake is energized to generate magnetic force, attracting the brake component mounted on the motor shaft. The brake component and the magnetic attractor then come into contact, generating friction through surface-to-surface contact to brake the motor shaft. However, when the motor shaft is subjected to significant external force, the braking force generated by surface-to-surface contact friction is relatively small, causing the brake component to fail to lock the motor shaft, potentially leading to brake failure. Therefore, this invention provides an electromagnetic brake to improve its braking performance and prevent brake failure under large external forces.

[0059] Example 1:

[0060] like Figure 1-10 As shown, this embodiment provides an electromagnetic brake 1, including a magnetic attraction component 11 and a brake component 12. The magnetic attraction component 11 is installed on the housing 13 of the electromagnetic brake 1, and the magnetic attraction component 11 is provided with a first limiting part 111. The brake component 12 is connected to the rotating shaft 14 of the electromagnetic brake 1, and the rotating shaft 14 is rotatably connected to the housing 13. The brake component 12 rotates with the rotating shaft 14, and the brake component 12 can move along the axial direction of the rotating shaft 14 under the action of an external force. The brake component 12 is provided with a second limiting part 121 that cooperates with the first limiting part 111. One of the first limiting part 111 and the second limiting part 121 is a limiting protrusion, and the other is a limiting recess. When the magnetic attraction component 11 is energized, the magnetic attraction component 11 attracts the brake component 12 to move along the axial direction of the rotating shaft 14, so that the limiting protrusion and the limiting recess engage with each other to prevent the rotation of the rotating shaft 14.

[0061] In this embodiment, the magnetic suction assembly 11 is provided with a first limiting part 111, and the brake assembly 12 is provided with a second limiting part 121 that cooperates with the first limiting part 111. One of the first limiting part 111 and the second limiting part 121 is a limiting protrusion, and the other is a limiting recess. Optionally, the first limiting part 111 can be a limiting protrusion, and the second limiting part 121 can be a limiting recess; alternatively, the first limiting part 111 can be a limiting recess, and the second limiting part 121 can be a limiting protrusion. The first limiting part 111 and the second limiting part 121 only need to be able to engage with each other to limit and prevent the rotation of the rotating shaft 14. Figure 7 and 9 The first limiting part 111 shown is a limiting recess, and the second limiting part 121 is a limiting protrusion. After the magnetic attraction assembly 11 is energized, it generates an attractive force, which attracts the brake assembly 12, causing the brake assembly 12 to move axially along the rotating shaft 14. The magnetic attraction assembly 11 and the brake assembly 12 come into contact, thereby locking the limiting protrusion and the limiting recess together, thus preventing the rotation of the rotating shaft 14. By locking the limiting protrusion and the limiting recess together, friction and slippage are avoided, effectively improving the braking performance of the electromagnetic brake 1. Especially when the rotating shaft 14 is subjected to a large external force, the electromagnetic brake 1 in this embodiment has a significantly increased braking force due to the locking and clamping of the limiting protrusion and the limiting recess, thus effectively preventing brake failure.

[0062] As can be seen, after the magnetic attraction component 11 is energized, it generates an attractive force, which attracts the brake component 12, causing the brake component 12 to move along the axial direction of the rotating shaft 14. The magnetic attraction component 11 and the brake component 12 come into contact, thereby causing the limiting protrusion and the limiting recess to engage with each other, thus preventing the rotation of the rotating shaft 14. The engagement of the limiting protrusion and the limiting recess avoids friction and slippage, effectively improving the braking performance of the electromagnetic brake 1. Especially when the rotating shaft 14 is subjected to a large external force, the braking force is significantly increased due to the mutual engagement of the limiting protrusion and the limiting recess, thus effectively preventing brake failure.

[0063] like Figure 2-6 As shown, the magnetic suction assembly 11 includes a magnetic suction member 112 and a first limiting member 113. The magnetic suction member 112 is connected to the first limiting member 113, and the first limiting member 113 is installed on the housing 13. The first limiting part 111 is disposed on the first limiting member 113. The braking assembly 12 includes a second limiting member 122 and a braking member 123 that is attracted to the magnetic suction member 112 after it is powered on. The second limiting part 121 is disposed on the second limiting member 122, and the braking member 123 is connected to the second limiting member 122. The second limiting member 122 is installed on the rotating shaft 14. The second limiting member 122 rotates with the rotating shaft 14 and can move along the axial direction of the rotating shaft 14 under the action of external force. After the magnetic suction member 112 is powered on, the magnetic suction member 112 attracts the braking member 123, causing the second limiting member 122 to move along the axial direction of the rotating shaft 14, so that the limiting protrusion and the limiting recess engage with each other.

[0064] In this embodiment, the connection between the magnetic suction member 112 and the first limiting member 113 is a fixed connection. The first limiting member 113 is fixedly connected to the outer wall of the magnetic suction member 112, so that the magnetic suction member 112 and the first limiting member 113 form an integral whole. The first limiting member 113 can be fixedly installed on the housing 13 by screws to ensure that the connection between the first limiting member 113 and the housing 13 is secure, so that the magnetic suction member 112 is fixed to the housing 13 and does not rotate with the rotating shaft 14. The connection between the brake member 123 and the second limiting member 122 is a fixed connection. In one embodiment, the brake member 123 and the second limiting member 122 are an integral structure to ensure the integrity of the brake member 123 and the second limiting member 122. The second limiting member 122 is installed on the rotating shaft 14 so that the second limiting member 122 can rotate with the rotating shaft 14, that is, the brake assembly 12 can rotate with the rotating shaft 14 and can move along the axial direction of the rotating shaft 14 under the action of external force. The first limiting part 111 is disposed on the first limiting member 113, and the second limiting part 121 is disposed on the second limiting member 122. The first limiting part 111 can be a limiting protrusion and the second limiting part 121 can be a limiting recess, or the first limiting part 111 can be a limiting recess and the second limiting part 121 can be a limiting protrusion. After the magnetic attractor 112 is energized, the magnetic attractor 112 generates an attractive force, and the magnetic attractor 112 will attract the brake member 123, causing the brake member 123 to move along the axial direction of the rotating shaft 14. The first limiting member 113 and the second limiting member 122 fit together, so that the limiting protrusion and the limiting recess are engaged with each other, thereby preventing the rotation of the rotating shaft 14. The interlocking of the limiting protrusion and the limiting recess prevents friction and slippage, effectively improving the braking performance of the electromagnetic brake 1. When the rotating shaft 14 is subjected to a large external force, the braking force is significantly increased due to the interlocking and locking of the limiting protrusion and the limiting recess, thus effectively preventing brake failure.

[0065] As can be seen, after the magnetic suction component 112 is energized, the magnetic suction component 112 generates an attractive force, which attracts the brake component 123, causing the brake component 123 to move along the axial direction of the rotating shaft 14. The first limiting component 113 and the second limiting component 122 fit together, thereby making the limiting protrusion and the limiting recess interlock, thus preventing the rotation of the rotating shaft 14. The interlocking of the limiting protrusion and the limiting recess avoids friction and slippage, which can effectively improve the braking performance of the electromagnetic brake 1.

[0066] like Figure 5 and 9 As shown, the brake component 123 is a metal component, and the second limiting component 122 is a plastic component or a metal component. The brake component 123 and the second limiting component 122 are an integral structure.

[0067] In this embodiment, the brake component 123 is a metal component. When the magnetic suction component 112 is energized, it generates an attractive force. Since the brake component 123 is a metal component, under the attraction of the magnetic suction component 112, the brake component 123 moves axially along the rotating shaft 14, causing the first limiting component 113 and the second limiting component 122 to come into contact, thereby locking the limiting protrusion and the limiting recess together and preventing the rotation of the rotating shaft 14. The fact that the brake component 123 is a metal component ensures that the brake component 123 can be smoothly attracted by the energized magnetic suction component 112. The second limiting component 122 can be a plastic component or a metal component. When the second limiting component 122 is a plastic component, the brake component 123 and the second limiting component 122 can be integrally formed by injection molding. When the second limiting component 122 is a metal component, the brake component 123 and the second limiting component 122 can be integrally formed by welding or molding. The brake component 123 and the second limiting component 122 are an integral structure. The brake component 123 and the second limiting component 122 are firmly connected to ensure the overall structural strength of the brake assembly 12. Under the attraction of the magnetic component 11, the brake assembly 12 can move along the axial direction of the rotating shaft 14 as a whole, so that the first limiting component 113 and the second limiting component 122 fit together, thereby making the limiting protrusion and the limiting recess interlock, thereby preventing the rotation of the rotating shaft 14.

[0068] As can be seen, the brake component 123 is a metal component, and the second limiting component 122 is a plastic or metal component. The brake component 123 and the second limiting component 122 are an integral structure. On the one hand, under the attraction of the magnetic component 112, the brake component 123 moves along the axial direction of the rotating shaft 14 so that the first limiting component 113 and the second limiting component 122 fit together, thereby making the limiting protrusion and the limiting recess interlock, thereby preventing the rotation of the rotating shaft 14. On the other hand, the brake component 123 and the second limiting component 122 are an integral structure, and the two are firmly connected to ensure the overall structural strength of the brake assembly 12.

[0069] like Figure 2 , 3 As shown in 5, 6 and 9, the second limiting member 122 is provided with a connecting portion 1221 and an extension portion 1222 extending outward in the circumferential direction along the connecting portion 1221. The connecting portion 1221 is sleeved on the outside of the rotating shaft 14. The connecting portion 1221 rotates with the rotating shaft 14 and can move along the axial direction of the rotating shaft 14 under the action of external force. The extension portion 1222 and / or the connecting portion 1221 are provided with the brake member 123 on the side facing the magnetic suction member 112. The brake member 123 is disposed opposite to the magnetic suction member 112. The extension portion 1222 is provided with the second limiting portion 121 on the side facing the first limiting portion 111, and the second limiting portion 121 and the first limiting portion 111 are disposed opposite to each other.

[0070] In this embodiment, the connecting part 1221 is sleeved on the outside of the rotating shaft 14. The connecting part 1221 rotates with the rotating shaft 14, that is, the second limiting member 122 can rotate with the rotating shaft 14, thereby realizing that the brake assembly 12 rotates with the rotating shaft 14. The connecting part 1221 can move along the axial direction of the rotating shaft 14 under the action of external force, that is, the second limiting member 122 can move along the axial direction of the rotating shaft 14 under the action of external force, thereby realizing that the brake assembly 12 can move along the axial direction of the rotating shaft 14 under the action of external force. After the magnetic suction assembly 11 is energized, the magnetic suction assembly 11 generates an attractive force, and the magnetic suction assembly 11 will attract the brake assembly 12, causing the brake assembly 12 to move along the axial direction of the rotating shaft 14. The extension 1222 and / or the connecting portion 1221 are provided with a brake 123 on the side facing the magnetic member 112, so that the brake 123 is arranged opposite to the magnetic member 112, so that the magnetic member 112 can attract the brake 123 after being energized. Under the attraction of the magnetic member 112, the brake 123 moves closer to the magnetic member 112 along the axial direction of the rotating shaft 14. The extension 1222 is provided with a second limiting portion 121 on the side facing the first limiting portion 111. The second limiting portion 121 and the first limiting portion 111 With the first limiting part 111 and the second limiting part 121 respectively, one of them is a limiting protrusion and the other is a limiting recess. After the magnetic suction member 112 is energized, the connecting part 1221 moves towards the magnetic suction member 112 along the axial direction of the rotating shaft 14 under the attraction of the magnetic suction member 112. Finally, the second limiting part 121 and the first limiting part 111 fit together, realizing the mutual engagement of the limiting protrusion and the limiting recess, avoiding friction and slippage, and effectively improving the braking performance of the electromagnetic brake 1.

[0071] As can be seen, the connecting part 1221 is sleeved on the outside of the rotating shaft 14. The connecting part 1221 rotates with the rotating shaft 14 and can move along the axial direction of the rotating shaft 14 under the action of external force. The extension part 1222 and / or the side of the connecting part 1221 facing the magnetic suction member 112 is provided with a brake member 123. The brake member 123 is arranged opposite to the magnetic suction member 112. The side of the extension part 1222 facing the first limiting part 111 is provided with a second limiting part 121. The second limiting part 121 and the first limiting part 111 are arranged opposite to each other. After the magnetic suction member 112 is energized, the connecting part 1221 moves towards the magnetic suction member 112 along the axial direction of the rotating shaft 14 under the attraction of the magnetic suction member 112. Finally, the second limiting part 121 and the first limiting part 111 fit together, realizing the mutual locking of the limiting protrusion and the limiting recess, avoiding friction and slippage.

[0072] like Figure 5 and 9As shown, the end of the extension 1222 is provided with a limiting ring 1223, and a plurality of second limiting portions 121 are evenly arranged along its circumference on the side of the limiting ring 1223 facing the first limiting portion 111; the brake member 123 is located between the limiting ring 1223 and the connecting portion 1221; the side of the first limiting member 113 facing the extension 1222 is provided with a limiting step 1131, and a plurality of first limiting portions 111 are arranged along its circumference on the step surface of the limiting step 1131; the magnetic suction member 112 is located between the limiting step 1131 and the connecting portion 1221.

[0073] In this embodiment, a limiting ring 1223 is provided at the end of the extension 1222. The limiting ring 1223 is an annular ring and is provided at the end of the extension 1222. A plurality of second limiting portions 121 are evenly arranged circumferentially on the side of the limiting ring 1223 facing the first limiting portion 111. A limiting step 1131 is provided on the side of the first limiting member 113 facing the extension 1222. A plurality of first limiting portions 111 are arranged circumferentially on the step surface of the limiting step 1131. The number of first limiting portions 111 and second limiting portions 121 can be set according to the actual situation and is not limited here. It can be understood that the more first limiting portions 111 and second limiting portions 121 there are, the more secure the engagement between the first limiting portions 111 and the second limiting portions 121 will be, and the more obvious the braking effect will be. However, the more first limiting portions 111 and second limiting portions 121 there are, the more complicated the manufacturing process will be. Therefore, the number of first limiting portions 111 and second limiting portions 121 can be determined according to the actual application of the electromagnetic brake 1. The number of the first limiting part 111 and the second limiting part 121 is determined to ensure that the engagement between the first limiting part 111 and the second limiting part 121 is sufficiently secure, further improving the braking effect of the electromagnetic brake 1 and effectively preventing brake failure; the brake component 123 is located between the limiting ring 1223 and the connecting part 1221, and the magnetic suction component 112 is located between the limiting step 1131 and the connecting part 1221, that is, the brake component 123 and the magnetic suction component 112 are arranged opposite to each other, limiting the... The ring 1223 is positioned opposite to the limiting step 1131. The brake component 123 and the second limiting component 122 are integral structures. When the magnetic suction component 112 is energized, it generates an attractive force, which attracts the brake component 123 to move towards the magnetic suction component 112 along the axial direction of the rotating shaft 14, thereby achieving the fit between the first limiting part 111 and the second limiting part 121. This also achieves the mutual engagement between the limiting protrusion and the limiting recess, avoiding friction and slippage, and improving the braking performance of the electromagnetic brake 1.

[0074] As can be seen, by uniformly arranging multiple second limiting portions 121 along the circumference of the side of the limiting ring 1223 facing the first limiting portion 111, and by arranging multiple first limiting portions 111 along the circumference of the step surface of the limiting step 1131, the engagement between the first limiting portion 111 and the second limiting portion 121 is ensured to be sufficiently secure, thereby further improving the braking effect of the electromagnetic brake 1 and effectively preventing brake failure; the brake component 123 is located between the limiting ring 1223 and the connecting portion 1221, and the magnetic suction component 1 12 is located between the limiting step 1131 and the connecting part 1221. The brake component 123 and the magnetic suction component 112 are arranged opposite to each other. The limiting ring 1223 and the limiting step 1131 are arranged opposite to each other. When the magnetic suction component 112 is energized, it generates a suction force, which attracts the brake component 123 to move towards the magnetic suction component 112 along the axial direction of the rotating shaft 14, so as to realize the fit between the first limiting part 111 and the second limiting part 121, thereby realizing the mutual engagement between the limiting protrusion and the limiting recess, and thus realizing the braking performance of the electromagnetic brake 1.

[0075] like Figure 2-6 As shown, the brake component 123 includes a first brake portion 1231 and a second brake portion 1232. The first brake portion 1231 is mounted on the side of the connecting portion 1221 facing the magnetic attractor 112, and the second brake portion 1232 is mounted on the extension portion 1222. The second brake portion 1232 bends and extends towards the outer peripheral surface of the connecting portion 1221 to connect with the first brake portion 1231. The magnetic attractor 112 includes an electromagnet core 1121 sleeved on the outside of the rotating shaft 14. The electromagnet core 1121 includes a first magnetic attractor portion 1123 and a second magnetic attractor portion 1122 connected to each other. The first magnetic attractor portion 1123 is correspondingly arranged with the first brake portion 1231, and the second magnetic attractor portion 1122 is correspondingly arranged with the second brake portion 1232.

[0076] In this embodiment, the first brake part 1231 is mounted on the side of the connecting part 1221 facing the magnetic attractor 112. The first brake part 1231 and the connecting part 1221 rotate together with the rotating shaft 14 and can move along the axial direction of the rotating shaft 14 under the action of external force. The second brake part 1232 is mounted on the extension part 1222. The second brake part 1232 bends and extends towards the outer peripheral surface of the connecting part 1221 to connect with the first brake part 1231. The first brake part 1231 is mounted on one end face of the connecting part 1221 facing the magnetic attractor 112. The second brake part 1232 is mounted on the extension part 1222. 1. The first brake part 1231 is fixedly connected to the connecting part 1221. The second brake part 1232 and the extension part 1222 are also fixedly connected. The first brake part 1231 and the second brake part 1232, as well as the connecting part 1221 and the extension part 1222, are an integral structure to ensure the overall structural strength of the brake assembly 12. This ensures that the second brake part 1232 is attracted under the attraction of the magnetic component 11. That is, the brake assembly 12 can move along the axial direction of the rotating shaft 14 as a whole, so that the first limiting member 113 and the second limiting member 122 fit together, thereby making the limiting protrusion and the limiting recess interlock, thereby preventing the rotation of the rotating shaft 14. The electromagnet core 1121 includes a first magnetic attraction part 1123 and a second magnetic attraction part 1122 connected to each other. The first magnetic attraction part 1123 of the electromagnet core 1121 is in the shape of a ring-shaped disc, and the second magnetic attraction part 1122 of the electromagnet core 1121 is in the shape of a cylinder. The axial cross section of the electromagnet core 1121 is an L-shape symmetrical about its axis. The first magnetic attraction part 1123 is located in the horizontal part of the L-shape, and the second magnetic attraction part 1122 is located in the vertical part of the L-shape. The side of the electromagnet core 1121 away from the rotating shaft 14 is fixedly connected to the first limiting member 113 so that the electromagnet core 1121 and the first limiting member 113 form a whole, ensuring that the magnetic attracting member 112 is fixed to the housing 13 and does not rotate with the rotating shaft 14. The side of the first magnetic attracting part 1123 is correspondingly arranged with the first braking part 1231, and the upper end face of the second magnetic attracting part 1122 is correspondingly arranged with the second braking part 1232. After the magnetic attracting member 112 is energized, the second braking part 1232 moves along the rotating shaft 14 towards the second magnetic attracting part 1122 under the attraction of the magnetic attracting member 112, thereby realizing that the first limiting member 113 and the second limiting member 122 are in contact, so that the limiting protrusion and the limiting recess are locked together, thereby preventing the rotation of the rotating shaft 14.

[0077] As can be seen, the first brake part 1231 is installed on the side of the connecting part 1221 facing the magnetic member 112, and the second brake part 1232 is installed on the extension part 1222. The first brake part 1231 and the second brake part 1232, as well as the connecting part 1221 and the extension part 1222, are an integral structure, ensuring the overall structural strength of the brake assembly 12. This ensures that the second brake part 1232 is attracted under the attraction of the magnetic member 11, meaning that the brake assembly 12 can move along the axial direction of the rotating shaft 14 as a whole. The first magnetic member 1123 is correspondingly arranged with the first brake part 1231, and the second magnetic member 1122 is correspondingly arranged with the second brake part 1232. Under the attraction of the magnetic member 112, the second brake part 1232 moves along the rotating shaft 14 toward the second magnetic member 1122, thereby achieving the engagement of the first limiting member 113 and the second limiting member 122. This causes the limiting protrusion and the limiting recess to engage with each other, thereby preventing the rotation of the rotating shaft 14.

[0078] like Figure 2-8 As shown, the electromagnet core 1121 has a receiving space 1125, and the magnetic attractor 112 further includes a coil sleeve 1124 located in the receiving space 1125. The coil sleeve 1124 is sleeved on the outside of the brake member 123, and a coil (not shown in the figure) is wound on the coil sleeve 1124. After the magnetic attractor 112 is energized, the first magnetic attractor 1123 and the first brake member 1231 and / or the second magnetic attractor 1122 and the second brake member 1232 are attracted together.

[0079] In this embodiment, the first magnetic attraction part 1123 and the second magnetic attraction part 1122 connected together form an accommodating space 1125. The coil sleeve 1124 is located within the accommodating space 1125. The second magnetic attraction part 1122 is fixedly connected to the first limiting member 113 so that the magnetic attraction part 112 and the first limiting member 113 form a whole. The coil sleeve 1124 is installed within the accommodating space 1125, and a coil (not shown in the figure) is wound on the coil sleeve 1124. After the coil of the magnetic attraction part 112 is energized, the magnetic attraction part 112 generates an attractive force. The first magnetic attraction part 1123 and the first braking part 1231, and the second magnetic attraction part 1122 and the second... The brake parts 1232 can be attracted to each other, thereby enabling the brake element 123 to move along the axis of the rotating shaft 14 towards the second magnetic part 1122 under the attraction of the magnetic part 112. The limiting protrusion and the limiting recess engage with each other to avoid friction and slippage, thus improving the braking performance of the electromagnetic brake 1. Preferably, the first magnetic part 1123 and the second magnetic part 1122 jointly attract the brake element 123, resulting in the best attraction effect. Of course, since the cross-sectional area of ​​the second magnetic part 1122 is larger, it can also be used as the main attraction component to attract the brake element 123. When the magnetic part 112 is de-energized, the second brake part 1232 moves away from the second magnetic part 1122 along the axis of the rotating shaft 14 under the action of external force, and the limiting protrusion and the limiting recess disengage, allowing the rotating shaft 14 to rotate again and release the braking effect. It should be noted that the magnetic accumulator 112 has a conventional structure in the art. When its coil is energized, it generates an attractive force, which drives the brake 123 to move along the axis of the rotating shaft 14 toward the magnetic accumulator 112. When its coil is de-energized, the attractive force disappears, and it loses its attraction to the brake 123. Under the action of external force, the brake 123 moves away from the magnetic accumulator 112 along the axis of the rotating shaft 14, releasing the brake on the rotating shaft 14.

[0080] As can be seen, the coil sleeve 1124 located in the accommodating space 1125 is sleeved on the outside of the brake component 123. The coil sleeve 1124 has a coil wound on it, so that when the coil is energized, it can generate an attractive force, driving the brake component 123 to move along the axis of the rotating shaft 14 towards the magnetic attractor 112. When the coil is de-energized, the attractive force disappears, and it loses its attraction to the brake component 123. Under the action of external force, the brake component 123 moves away from the magnetic attractor 112 along the axis of the rotating shaft 14, releasing the brake on the rotating shaft 14.

[0081] like Figure 2 , 3As shown in Figures 6 and 10, the electromagnetic brake further includes an elastic reset member 15, which is sleeved on the rotating shaft 14. When the magnetic suction member 112 is energized, it attracts the brake member 123 to move axially along the rotating shaft 14 and compresses the elastic reset member 15. When the magnetic suction member 112 is de-energized, the elastic reset member 15 pushes the brake assembly 12 to move axially along the rotating shaft 14 to its reset position.

[0082] In this embodiment, the elastic reset member 15 can be a spring or other elastic structure that can reset without external force. The elastic reset member 15 is sleeved on the rotating shaft 14. When the magnetic suction member 112 is energized, the magnetic suction member 112 generates an attractive force, attracting the brake member 123 to move towards the magnetic suction member 112 along the axial direction of the rotating shaft 14. At this time, the elastic reset member 15 is compressed under the action of the brake member 123. When the magnetic suction member 112 is de-energized, the magnetic suction member 112 loses its attractive force, and the compressed elastic reset member 15 will push the brake member 123 to move away from the magnetic suction member 112 along the axial direction of the rotating shaft 14 until it resets. The first limiting part 111 and the second limiting part 121 disengage, that is, the limiting protrusion and the limiting recess are released from engagement, the electromagnetic brake 1 is released from braking, and the rotating shaft 14 can resume rotation. This realizes that the electromagnetic brake 1 is automatically released from braking after the magnetic suction member 112 is de-energized, without the need for additional manual reset, reducing the cost of manual operation. In one embodiment, a bushing 16 is fixedly sleeved on the outer periphery of the rotating shaft 14. The brake component 123 can move axially along the bushing 16, thereby enabling the brake component 123 to move axially along the rotating shaft 14. The bushing 16 is provided with an abutment portion 163 at one end away from the brake component 123. One end of the elastic reset component 15 abuts against the brake component 123, and the other end of the elastic reset component 15 abuts against the abutment portion 163. When the brake component 123 moves towards the magnetic suction component 112 along the axial direction of the rotating shaft 14, the elastic reset component 15 can be compressed under the attraction of the magnetic suction component 112. When the magnetic suction component 112 is de-energized and loses its attraction, the elastic reset component 15 can push the brake component 123 to move away from the magnetic suction component 112 along the axial direction of the rotating shaft 14 under the action of elastic force, thereby resetting the brake component 123.

[0083] As can be seen, by means of the elastic reset member 15 sleeved on the rotating shaft 14, after the magnetic suction member 112 is energized, the magnetic suction member 112 attracts the brake member 123 to move along the axial direction of the rotating shaft 14 and compresses the elastic reset member 15; after the magnetic suction member 112 is de-energized, the elastic reset member 15 pushes the brake assembly 12 to move along the axial direction of the rotating shaft 14 to the reset position, so that the electromagnetic brake 1 automatically releases the brake after the magnetic suction member 112 is de-energized, without the need for additional manual reset.

[0084] like Figure 2 , 3As shown in Figures 6, 9, and 10, the brake assembly 12 is sleeved on the outside of the rotating shaft 14 and connected to the rotating shaft 14 through a sliding structure. The sliding structure includes a groove 161 and a slider 162 that slides in cooperation with the groove 161.

[0085] In this embodiment, the brake assembly 12 is connected to the rotating shaft 14 via a sliding structure. The sliding structure includes a groove 161 and a slider 162 that slides with the groove 161, enabling the brake assembly 12 to move axially along the rotating shaft 14. When the magnetic attractor 112 is energized, it has an attractive force and attracts the brake assembly 123. The slider 162 moves within the groove 161, allowing the brake assembly 123 to move closer to the magnetic attractor 112 along the axial direction of the rotating shaft 14. This allows the limiting protrusion and limiting recess to engage and lock together, achieving the braking effect of the electromagnetic brake 1. When the magnetic attractor 112 is de-energized, it loses its attractive force. Under the action of an external force, the slider 162 moves within the groove 161, allowing the brake assembly 123 to move away from the magnetic attractor 112 along the axial direction of the rotating shaft 14. The limiting protrusion and limiting recess disengage, releasing the electromagnetic brake 1.

[0086] As can be seen, the brake assembly 12 is connected to the rotating shaft 14 through a sliding structure. The sliding structure includes a slide groove 161 and a slider 162 that slides with the slide groove 161, which realizes the axial movement of the brake assembly 12 on the rotating shaft 14, thereby achieving the braking effect of the electromagnetic brake 1 or releasing the braking of the electromagnetic brake 1.

[0087] like Figure 2 , 3 As shown in Figures 6, 9, and 10, a bushing 16 is fixedly connected to the outside of the rotating shaft 14. The bushing 16 is located between the rotating shaft 14 and the brake assembly 12. The outer circumferential surface of the bushing 16 is provided with the groove 161 or the slider 162 along its axial direction. Correspondingly, the inner circumferential surface of the brake assembly 12 is provided with the slider 162 or the groove 161 along its axial direction.

[0088] In this embodiment, a bushing 16 is fixedly sleeved on the outer side of the rotating shaft 14. The bushing 16 is provided with a sliding groove 161 or a slider 162. Correspondingly, the inner ring surface of the brake assembly 12 is provided with a slider 162 or a sliding groove 161 along its axial direction. Optionally, the bushing 16 is provided with a sliding groove 161, and the inner ring surface of the brake assembly 12 is provided with a slider 162 along its axial direction. Alternatively, the bushing 16 is provided with a sliding groove 161, and the inner ring surface of the brake assembly 12 is provided with a sliding groove 161 along its axial direction. It is sufficient to enable relative sliding between the brake assembly 12 and the bushing 16. As one embodiment, one end of the slider 162 or sliding groove 161 on the bushing 16 is located at the end of the bushing 16, and the other end of the slider 162 or sliding groove 161 extends along the surface of the bushing to the middle of the bushing 16.

[0089] As one embodiment, a limiting component is provided on the rotating shaft 14 to restrict the axial movement of the brake assembly 12 on the rotating shaft 14. Specifically, see... Figure 2 and Figure 4 As shown, the brake assembly includes a retaining ring 141 and a washer 142. An annular groove 143 is provided on the outer circumferential surface of the rotating shaft 14. The retaining ring 141 is sleeved on the outside of the rotating shaft 14, with a portion of the retaining ring 141 near the inner annular surface installed within the annular groove 143 to fix the retaining ring 141 to the rotating shaft 14. Another portion of the retaining ring 141 abuts against the end face of the bushing 16 to prevent the bushing 16 from moving axially toward the retaining ring 141, i.e., to prevent the bushing 16 from disengaging from the rotating shaft 14. To balance and increase the preload between the retaining ring 141 and the bushing 16, a washer 142 is provided between the bushing 16 and the retaining ring 141, and the washer 142 is sleeved on the outside of the rotating shaft 14. The outer diameter of the gasket 142 is larger than the outer diameter of the bushing 16, and the outer diameter of the gasket 142 is larger than the inner diameter of the connecting part 1221. That is, the inner ring surface of the connecting part 1221 is provided with a snap-fit ​​surface 1224. When the magnetic attractor 112 is in the de-energized state, the elastic reset member 15 has elastic force. Under the action of the elastic reset member 15, the snap-fit ​​surface 1224 of the inner ring surface of the connecting part 1221 abuts against the outer edge of the gasket 142. That is, the gasket 142 can restrict the axial movement of the connecting part 1221 along the rotating shaft 14. Under the limiting action of the snap ring 141 and the gasket 142, the brake assembly 12 is effectively prevented from disengaging from the rotating shaft 14 when it moves axially along the rotating shaft 14.

[0090] As can be seen, the sliding groove 161 or slider 162 provided along the axial direction on the outer peripheral surface of the bushing 16, and the corresponding slider 162 or sliding groove 161 provided along the axial direction on the inner ring surface of the brake assembly 12, effectively guide the brake assembly 12 and, through the limiting action of the snap ring 141 and the washer 142, effectively prevent the brake assembly 12 from detaching from the rotating shaft 14 when moving along the axial direction of the rotating shaft 14.

[0091] Example 2:

[0092] like Figure 11-13 As shown, this embodiment provides a motor, which includes the electromagnetic brake 1 described in Embodiment 1. The housing 13 of the electromagnetic brake 1 is the outer shell of the motor 2, and the rotating shaft 14 is the output shaft of the motor 2.

[0093] In this embodiment, the motor has an electromagnetic brake 1 as described in Embodiment 1, and the housing 13 of the electromagnetic brake 1 is the outer shell of the motor 2. The rotating shaft 14 of the electromagnetic brake 1 is the output shaft of the motor 2, meaning that the electromagnetic brake 1 and the motor 2 are integrated. The electromagnetic brake 1 is installed at the tail end of the motor 2, and the output shaft of the motor 2 and the rotating shaft 14 of the electromagnetic brake 1 are the same shaft, i.e., the electromagnetic brake 1 is installed at the end of the motor output shaft away from its connection to the external structure. When the motor 2 rotates, the brake assembly 12 of the electromagnetic brake 1 rotates together with the output shaft of the motor 2. After the magnetic attraction assembly 11 is energized, the magnetic attraction assembly 11 will attract the brake assembly 12, causing the brake assembly 12 to move axially along the rotating shaft 14, thereby causing the limiting protrusion and the limiting recess to engage with each other, thus preventing the rotation of the output shaft of the motor 2. In this embodiment, the motor 2 is locked together by the mutual locking of the limiting protrusion and the limiting recess. Under the same conditions, its braking force is significantly increased, effectively avoiding friction and slippage, and effectively improving the braking performance of the motor 2. Even when the output shaft of the motor 2 is subjected to a large external force, the locking of the limiting protrusion and the limiting recess can effectively prevent the motor 2 from failing to brake.

[0094] As one embodiment, the motor 2 also includes a rear cover 21, which is fixedly connected to the housing 13 of the electromagnetic brake 1. The rear cover 21 covers the brake assembly 12 and the magnetic attraction assembly 11, and protects the brake assembly 12 and the magnetic attraction assembly 11.

[0095] In one embodiment, the electromagnetic brake further includes an elastic reset member 15, which is sleeved on the rotating shaft 14. When the magnetic suction member 112 is energized, the magnetic suction member 112 attracts the brake member 123 to move axially along the rotating shaft 14 and compresses the elastic reset member 15. When the magnetic suction member 112 is de-energized, the elastic reset member 15 pushes the brake assembly 12 to move axially along the rotating shaft 14 to reset. Since the magnetic suction component 11 attracts the brake component 12, the brake component 12 moves towards the magnetic suction component 11 along the axial direction of the rotating shaft 14. At this time, the elastic reset component 15 is compressed under the attraction of the magnetic suction component 11. When the magnetic suction component 11 is de-energized, the magnetic suction component 11 loses its attraction, and the compressed elastic reset component 15 has elasticity. The elastic reset component 15 drives the brake component 12 to move away from the magnetic suction component 11 along the axial direction of the rotating shaft 14, and the brake component 12 is reset. At this time, the first limiting part 111 and the second limiting part 121 are disengaged, that is, the limiting protrusion and the limiting recess are released from engagement, the electromagnetic brake 1 is released from braking, the rotating shaft 14 can resume rotation, the output shaft of the motor 2 can rotate, and the motor 2 can start normally.

[0096] In another embodiment, the electromagnetic brake 1 is installed inside the motor 2. The output shaft of the electromagnetic brake 1's rotating shaft 14 can be connected via a coupling. The rotating shaft 14 of the electromagnetic brake 1 can also rotate with the output shaft of the motor 2. After the magnetic attraction component 11 is energized, it attracts the brake component 12, causing the brake component 12 to move axially along the rotating shaft 14. This causes the limiting protrusion and limiting recess to engage with each other, preventing the rotation of the electromagnetic brake 1's rotating shaft 14, thereby preventing the rotation of the motor 2's output shaft and achieving braking of the motor 2. At this time, the elastic reset component 15 is compressed under the action of attraction. In this embodiment, the electromagnetic brake 1 can be installed in different motors 2; it is only necessary to connect the rotating shaft 14 of the electromagnetic brake 1 to the output shaft of the motor 2, thus improving the applicability of the motor 2.

[0097] Example 3:

[0098] This embodiment provides a barrier gate, including a drive motor and a gate arm. The drive motor drives the gate arm to open or close. The drive motor is the motor 2 described in Embodiment 2.

[0099] In this embodiment, the barrier gate, via motor 2 from Embodiment 2, engages with the limiting protrusion and limiting recess when the barrier gate is closed and the magnetic attraction component 11 is energized. This locking action prevents the rotation of the motor 2's output shaft, effectively braking the motor 2. When a large external force is applied to the gate arm, the locking engagement of the limiting protrusion and limiting recess significantly increases the braking force of the motor 2, effectively preventing braking failure and consequently preventing the barrier gate from failing to stop vehicles.

[0100] In one embodiment, the electromagnetic brake further includes an elastic reset member 15, which is sleeved on the rotating shaft 14. When the magnetic suction member 112 is energized, the magnetic suction member 112 attracts the brake member 123 to move axially along the rotating shaft 14 and compresses the elastic reset member 15. When the magnetic suction member 112 is de-energized, the elastic reset member 15 pushes the brake assembly 12 to move axially along the rotating shaft 14 to reset. The magnetic attraction component 11 attracts the brake component 12, causing the brake component 12 to move towards the magnetic attraction component 11 along the axial direction of the rotating shaft 14. At this time, the elastic reset component 15 is compressed under the attraction of the magnetic attraction component 11. When the magnetic attraction component 11 is de-energized, it loses its attraction. The compressed elastic reset component 15 has elasticity and drives the brake component 12 to move away from the magnetic attraction component 11 along the axial direction of the rotating shaft 14. The brake component 12 is reset. At this time, the first limiting part 111 and the second limiting part 121 are disengaged, that is, the limiting protrusion and the limiting recess are released from engagement. The electromagnetic brake 1 is released from braking, the rotating shaft 14 can resume rotation, the output shaft of the motor 2 can rotate, and the motor 2 can start normally. At this time, the gate arm of the barrier can be opened normally by controlling the motor 2.

[0101] Specifically, this barrier gate uses motor 2 from Embodiment 2 to drive the gate arm to open or close. When the gate arm is closed, if it is subjected to external force, such as being manually lifted, the barrier gate's controller or control system receives a signal and energizes the magnetic attraction component 11. The limiting protrusion and limiting recess engage with each other, preventing the rotation of the motor 2's output shaft, thus braking the gate arm. Even when external force is applied to the gate arm, it cannot be lifted, effectively preventing external force from lifting the gate arm and ensuring the barrier gate's normal closed state. When the external force on the gate arm disappears, the barrier gate's controller or control system de-energizes the magnetic attraction component 11, the limiting protrusion and limiting recess disengage, the electromagnetic brake 1 releases its braking, and the motor 2's output shaft can rotate normally. At this time, the motor 2 can normally control the raising and lowering of the barrier arm. The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the scope of protection of this utility model.

Claims

1. An electromagnetic brake, characterized in that, include: A magnetic attraction assembly is installed on the housing of the electromagnetic brake, and the magnetic attraction assembly is provided with a first limiting part; A braking assembly is connected to the rotating shaft of the electromagnetic brake. The rotating shaft is rotatably connected to the housing. The braking assembly rotates with the rotating shaft and is capable of moving along the axial direction of the rotating shaft under the action of an external force. The brake assembly is provided with a second limiting part that cooperates with the first limiting part. In the first limiting part and the second limiting part, one of them is a limiting protrusion and the other is a limiting recess. When the magnetic attraction component is powered on, it attracts the brake component and moves it along the axial direction of the rotating shaft, so that the limiting protrusion and the limiting recess engage with each other to prevent the rotation of the rotating shaft.

2. The electromagnetic brake according to claim 1, characterized in that, The magnetic suction assembly includes a magnetic suction component and a first limiting component. The magnetic suction component is connected to the first limiting component, the first limiting component is installed on the housing, and the first limiting part is disposed on the first limiting component. The braking assembly includes a second limiting member and a braking member that is attracted to the magnetic member after being energized. The second limiting part is disposed on the second limiting member, the braking member is connected to the second limiting member, the second limiting member is installed on the rotating shaft, the second limiting member rotates with the rotating shaft and can move along the axial direction of the rotating shaft under the action of external force. When the magnetic attractor is powered on, it attracts the brake and drives the second limiting member to move axially along the rotating shaft, so that the limiting protrusion and the limiting recess engage with each other.

3. The electromagnetic brake according to claim 2, characterized in that, The brake component is a metal component, and the second limiting component is a plastic or metal component. The brake component and the second limiting component are an integral structure.

4. The electromagnetic brake according to claim 2, characterized in that, The second limiting member has a connecting part and an extension part extending outward in the circumferential direction along the connecting part. The connecting part is sleeved on the outside of the rotating shaft. The connecting part rotates with the rotating shaft and can move along the axial direction of the rotating shaft under the action of external force. The brake member is provided on the side of the extension and / or the connecting portion facing the magnetic member, and the brake member is disposed opposite to the magnetic member; the second limiting portion is provided on the side of the extension facing the first limiting portion, and the second limiting portion and the first limiting portion are disposed opposite to each other.

5. The electromagnetic brake according to claim 4, characterized in that, The end of the extension is provided with a limiting ring, and a plurality of second limiting portions are evenly arranged along the circumference of the side of the limiting ring facing the first limiting portion; the brake component is located between the limiting ring and the connecting portion; The first limiting member has a limiting step on the side facing the extension, and the step surface of the limiting step has a plurality of first limiting parts along its circumference; the magnetic suction member is located between the limiting step and the connecting part.

6. The electromagnetic brake according to claim 4, characterized in that, The brake component includes a first brake part and a second brake part. The first brake part is mounted on the side of the connecting part facing the magnetic component, and the second brake part is mounted on the extension part. The second brake part is bent and extended towards the outer peripheral surface of the connecting part to connect with the first brake part. The magnetic attractor includes an electromagnet core sleeved outside the rotating shaft. The electromagnet core includes a first magnetic attractor and a second magnetic attractor connected to each other. The first magnetic attractor is correspondingly arranged with the first braking part, and the second magnetic attractor is correspondingly arranged with the second braking part.

7. The electromagnetic brake according to claim 6, characterized in that, The electromagnet core has a receiving space, and the magnetic attraction component also includes a coil sleeve located in the receiving space. The coil sleeve is sleeved on the outside of the brake component, and a coil is wound on the coil sleeve. When the magnetic attractor is energized, the first magnetic attractor and the first brake part and / or the second magnetic attractor and the second brake part attract each other.

8. The electromagnetic brake according to claim 2, characterized in that, Includes an elastic reset element, which is sleeved on the rotating shaft; When the magnetic attractor is energized, it attracts the brake component and moves it along the axial direction of the rotating shaft, and compresses the elastic reset component. After the magnetic suction component is de-energized, the elastic reset component pushes the brake assembly to move axially along the rotating shaft until it is reset.

9. The electromagnetic brake according to claim 1, characterized in that, The brake assembly is sleeved on the outside of the rotating shaft and connected to the rotating shaft through a sliding structure. The sliding structure includes a groove and a slider that slides in cooperation with the groove.

10. The electromagnetic brake according to claim 9, characterized in that, A bushing is fixedly connected to the outside of the rotating shaft. The bushing is located between the rotating shaft and the brake assembly. The outer circumferential surface of the bushing is provided with the groove or the slider along its axial direction. Correspondingly, the inner circumferential surface of the brake assembly is provided with the slider or the groove along its axial direction.

11. An electric motor, characterized in that, The electromagnetic brake as described in any one of claims 1-10 is wherein the housing of the electromagnetic brake is the outer shell of the motor, and the rotating shaft is the output shaft of the motor.

12. A barrier gate, comprising a drive motor and a gate arm, wherein the drive motor drives the gate arm to open or close, characterized in that, The drive motor is the motor described in claim 11.

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