Motor having brake apparatus
By integrating the brake case portion with the motor housing, the design addresses torque and heat dissipation issues, enhancing braking reliability and reducing costs while simplifying the structure.
Patent Information
- Application Number
- PCT/CN2023/142880
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-07-03
AI Technical Summary
Existing brake motors face challenges in maintaining sufficient torque and heat dissipation capacity, especially at elevated temperatures, which can compromise their ability to securely brake the motor and prevent accidents.
The integration of a brake case portion with the motor housing creates an integrated accommodating chamber, allowing for a simplified structure, increased installation space, and improved heat dissipation through an overmolded heat dissipation block, while utilizing a snap spring and elastic member to ensure effective braking.
This design enhances the motor's braking performance by maintaining torque and improving heat dissipation, ensuring reliable braking even at high temperatures and reducing manufacturing costs.
Smart Images

Figure CN2023142880_03072025_PF_FP_ABST
Abstract
Description
MOTOR HAVING BRAKE APPARATUSTECHNICAL FIELD
[0001] The present application relates generally to the technical field of motors, and particularly relates to a motor having a brake apparatus.BACKGROUND
[0002] A motor brake is a mechanical apparatus that serves to provide a resistance or braking force when a motor stops running, so that the motor decreases its rotation speed or stops rotation. Brake motors have been widely used in the fields, such as industrial control and automobiles. Performance of the brake is crucial for the motor. For example, a maximum torque and an attenuation degree of a static torque in a thermal state of the brake determine whether it can firmly brake the motor in emergency to prevent occurrence of an accident. Generally, the higher the temperature is, the more the torque of a brake apparatus decreases, thus requesting the brake to have sufficiently large torque and enough heat dissipation capacity to meet braking requirements of a driven device driven by the motor throughout its life cycle. At present, improving the structure and performance of the brake motors are desirable.SUMMARY
[0003] In view of this, a brake case portion and a motor housing are integrated for a motor having a brake apparatus provided in embodiments of the present disclosure, so that the brake case portion and the motor housing define an integrated accommodating chamber, thereby enlarging the installation space of the brake apparatus.
[0004] An embodiment of the present disclosure provides a motor having a brake apparatus, the motor including: a motor housing, the brake apparatus, and a rotating shaft. The motor housing includes a first case portion and a second case portion. The brake apparatus includes a brake case portion and a brake assembly, where the first case portion, the brake case portion, and the second case portion are sequentially arranged along an axial direction of the motor to define an accommodating chamber, a region where the accommodating chamber is aligned to the brake case portion is a braking region, the brake assembly is arranged in the braking region, and the brake assembly is directly connected to the brake case portion. The rotating shaft is arranged in the accommodating chamber, and the rotating shaft extends from the first case portion to the second case portion through the brake assembly and the brake case portion. The so-called "region where the accommodating chamber is aligned to the brake case portion is a braking region" here means that the braking region is defined by the brake case portion, or that the braking region corresponds to where the brake case portion is along the axial direction of the motor.
[0005] In an imbodiment of the present disclosure, the brake case portion includes a sleeve and a support plate, the sleeve is arranged on one side of the support plate facing the first case portion, the sleeve includes a first tubular segment and a second tubular segment sequentially arranged along the axial direction of the motor, an inner diameter of the second tubular segment is smaller than an inner diameter of the first tubular segment, and the bearing is arranged in the first tubular segment and abuts an end face of the second tubular segment.
[0006] An outer diameter of the first tubular segment is equal to an outer diameter of the second tubular segment according to one or more embodiments of the present disclosure.
[0007] In an imbodiment of the present disclosure, a first annular groove is provided on an inner wall surface of the first tubular segment, and a radial dimension of the first annular groove is larger than the inner diameter of the first tubular segment. The brake apparatus further includes a snap spring, where the snap spring is arranged in the first annular groove and abuts an inner wall of the first annular groove, and an inner diameter of the snap spring is smaller than the inner diameter of the first tubular segment.
[0008] In an imbodiment of the present disclosure, the brake assembly further includes a motor armature, an end plate member, a brake disc, a movable core, and an elastic member. The motor armature is sleeved on an outer peripheral surface of the sleeve. The end plate member is directly connected to one side of the brake case portion facing the first case portion; the brake disc is located between the motor armature and the end plate member, and the brake disc is sleeved on an outer peripheral surface of the rotating shaft, and is engaged with the outer peripheral surface of the rotating shaft. The movable core is located between the brake disc and the motor armature. One end of the elastic member is arranged in the braking region, and the other end of the elastic member abuts one side of the movable core away from the brake disc. When the motor is powered on, the elastic member is pressed through the movable core with an electromagnetic force of the motor armature, so that the brake disc is separated from the movable core and rotates with the rotating shalt. When the motor is powered off, the elastic member is released with disappearance of the electromagnetic force of the motor armature, to push the movable core through the elastic member to press the brake disc until the brake disc comes into contact with the end plate member, thereby locking the rotating shaft.
[0009] The motor further includes a heat dissipation block according to one or more embodiments of the present disclosure. The heat dissipation block is formed with an over molding material overmolded between the motor armature and the brake case portion.
[0010] In an embodiment of the present disclosure, a first wire pass through opening is provided on the first case portion, and the first wire pass through opening is configured to allow a first wiring terminal of the coil assembly to pass through.
[0011] In an imbodiment of the present disclosure, a third wire pass through opening is provided at an edge of the end plate member, a fourth wire pass through opening is provided at an edge of the movable core, and a height of the third wire pass through opening is higher than a height of the fourth wire pass through opening.
[0012] In an imbodiment of the present disclosure, the motor further comprises a fitting piece, the fitting piece is sleeved on the rotating shaft, a first engaging part is provided on an outer peripheral surface of the fitting piece, a through hole is provided in a central area of the brake disc, a second engaging part is provided on an inner circumference of the through hole, and the brake disc is sleeved on an outer periphery of the fitting piece, so that the second engaging part is engaged with the first engaging part.
[0013] In another imbodiment of the present disclosure, the motor includes a second wiring terminal which is configured to be electrically connected to an external power source through the first wire pass through opening.
[0014] In another imbodiment of the present disclosure, the brake case portion includes a bolt hole and a spring hole that are integrally formed with the brake case portion, where the bolt hole is configured to connect to the end plate member through a bolt, and the spring hole is configured to accommodate the elastic member.
[0015] The motor housing and the brake case portion are an integrated structure, that is, the motor and the brake share the case portion, and the brake case portion also serves as a part of the motor housing in the embodiments of the present disclosure. Thus, an integrated accommodating chamber is defined in the motor housing and the brake case portion to accommodate the internal components of the motor and the internal components of the brake. Specifically, the brake assembly is arranged in a region of the accommodating chamber aligned to the brake case portion. Compared with the structure having a motor housing and a brake apparatus with a standalone brake case disposed within the motor housing (for example, the brake apparatus having the brake case is arranged at the rear of the motor housing as a standalone apparatus) . The embodiments of the present disclosure simplify the structure of the motor, reduce the costs accordingly, provide an enlarged space inside the motor for the assembly of the brake assembly, and also improve the flexibility of the assembly of the brake assembly.BRIEF DESCRIPTION OF DRAWINGS
[0016] FIG. 1 is a schematic perspective view of a motor having a brake apparatus according to an embodiment of the present disclosure;
[0017] FIG. 2 is a sectional view of the motor having a brake apparatus according to an embodiment of the present disclosure;
[0018] FIG. 3 is a schematic perspective view of the motor having a brake apparatus with its motor housing removed according to an embodiment of the present disclosure;
[0019] FIG. 4 is a schematic perspective view of the motor having a brake apparatus with the motor housing and brake case portion removed according to an embodiment of the present disclosure;
[0020] FIG. 5 is a schematic perspective view of the brake apparatus according to an embodiment of the present disclosure;
[0021] FIG. 6 is a schematic perspective view of a brake assembly according to an embodiment of the present disclosure;
[0022] FIG. 7 is an exploded view of the brake apparatus according to an embodiment of the present disclosure;
[0023] FIG. 8 is a schematic perspective view of a brake case portion according to an embodiment of the present disclosure;
[0024] FIG. 9 is a front view of the brake case portion according to an embodiment of the present disclosure; and
[0025] FIG. 10 is a sectional view at a line A-A in FIG. 9.
[0026] List of reference numerals: DESCRIPTION OF EMBODIMENTS
[0027] In order to make the objectives, technical solutions, and advantages of the present disclosure clearer, embodiments of the present disclosure will be further described in detail below with reference to the drawings.
[0028] In the description of the present disclosure, it should be understood that the directions or position relationships indicated by the terms, such as "center, " "above, " "below, " "in front of, " "behind, " "left, " "right, " "vertical, " "horizontal, " "top, " "bottom, " "inner, " and "outer, " are based on the directions or position relationships shown in the drawings, are only provided to facilitate describing the present disclosure and simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific direction, or be constructed and operated in a specific direction, and therefore cannot be construed as limiting the present disclosure.
[0029] As mentioned above, a brake apparatus, as a key component, provides an ability to slow down, stop, and brake a motor, and can meet braking requirements of a driven device driven by the motor within a wide speed range. The performance of the brake apparatus is crucial to the motor. A maximum torque and an attenuation degree of a static torque in a thermal state of the brake apparatus determine whether it can securely brake the motor in emergency to prevent occurrence of an accident. Generally, the higher the temperature is, the more the torque of a brake apparatus decreases, thus requesting the brake to have sufficiently large torque and enough heat dissipation capacity to meet braking requirements of a driven device driven by the motor throughout its life cycle.
[0030] A motor 1000 having a brake apparatus 200 provided in embodiments of the present disclosure is described in detail below with reference to FIG. 1-FIG. 10.
[0031] According to an embodiment of the present disclosure, a motor 1000 having a brake apparatus 200 is provided. The motor 1000 includes a motor housing 100, the brake apparatus 200, and a rotating shaft 400. As an external protection structure of the motor 1000, the motor housing 100 can protect an electronic device inside the motor 1000, thus providing protection functions such as dustproof and waterproof functions.
[0032] The brake apparatus 200, also known as a brake, functions to provide a resistance or a braking force when the motor 1000 stops running. When the motor 1000 is powered on, the brake apparatus 200 will release the motor. When the motor 1000 loses power, the brake apparatus 200 securely brakes a rotating shaft 400 of the motor 1000, thus playing a role in braking the motor 1000. Particularly, when the motor 1000 is powered off, the brake apparatus 200 needs to firmly brake the rotating shaft 400 of the motor 1000 within a short time, thereby locking the motor 1000.
[0033] Specifically, as shown in FIG. 1 and FIG. 2, the motor housing 100 includes a first case portion 110 and a second case portion 120. An accommodating space is provided inside each of the first case portion 110 and the second case portion 120 for accommodating an electronic device of the motor 1000, such as a stator, a rotor, and the rotating shaft 400.
[0034] As shown in FIG. 5 and FIG. 6, the brake apparatus 200 includes a brake case portion 220 and a brake assembly 210. As shown in FIG. 2 and FIG. 3, the first case portion 110, the brake case portion 220, and the second case portion 120 are sequentially arranged along an axial direction of the motor 1000 to define an accommodating chamber 300. It is noted that the left side in FIG. 2 is referred to as the left direction, and the right side in FIG. 2 is referred to as the right direction. Specifically, the axial direction of the motor 1000 is an extension direction of the rotating shaft 400 of the motor 1000. The rotating shaft 400 is arranged to extend in the motor 1000 along the left-right direction in FIG. 2.
[0035] In some other embodiments, the first case portion 110, the second case portion 120, and the brake case portion 220 may be separately machined components, and define a closed case portion through connections, such as engaging, splicing, or bolt connections.
[0036] Here, it is necessary to explain the term "integrate" herein. The term "integrate" herein can be defined as "share" , that is, the motor 1000 and the brake apparatus 200 share a segment of the case portion, i.e., the brake case portion 220. In other words, in the motor 1000 of an embodiment of the present disclosure, the brake case portion 220 can not only serve as a part of the motor housing 100, but also serve as a housing of the brake assembly 210.
[0037] The first case portion 110, the brake case portion 220, and the second case portion 120 together define the housing of the motor 1000. In other words, the motor 1000 shares the brake case portion 220 with the brake, or in other words, the brake case portion 220 also serves as a part of the case portion of the motor 1000.
[0038] Further, as shown in FIG. 2, the accommodating chamber 300 is defined inside the first case portion 110, the brake case portion 220, and the second case portion 120. A position where the accommodating chamber 300 is aligned to the brake case portion 220 is a braking region 230. The brake assembly 210 is arranged in the braking region 230. Further, the brake assembly 210 is directly connected to the brake case portion 220, for example, the brake assembly 210 can be directly connected to the brake case portion 220 through a bolt. Therefore, the brake assembly 210 is arranged inside the motor 1000, and is directly connected to the brake case portion 220 that can serve as a part of the motor housing 100, thereby achieving an integrated structural design of the brake apparatus 200 and the motor 1000, and integrating the brake case portion 220 and the motor housing 100.
[0039] Compared with a brake apparatus having a standalone brake case portion arranged inside a motor housing, the motor 1000 in the embodiments of the present disclosure is inexpensive to manufacture with a simple structure. Further, a larger space is also provided inside the motor 1000 for the installation of the brake assembly 210. It should be noted that the so-called "the brake assembly 210 is directly connected to the brake case portion 220" herein means that no other components are provided between the brake assembly 210 and the brake case portion 220.
[0040] As shown in FIG. 3 and FIG. 4, the rotating shaft 400 of the motor 1000 is arranged in the accommodating chamber 300, and the rotating shaft 400 extends from the first case portion 110 to the second case portion 120 through the brake assembly 210 and the brake case portion 220. Therefore, the rotating shaft 400 is sleeved with the brake assembly 210 at a position aligned to the braking region 230, so that, when the motor 1000 is powered off, the motor 1000 can be braked through the brake assembly 210.
[0041] In the motor 1000 having a brake apparatus 200 according to an embodiment of the present disclosure, the motor housing 100 and the brake case portion 220 are integral. Namely, the brake case portion 220 also serves as a part of the motor housing 100, and a part of the motor housing 100 also serves as the brake case portion where the components of the brake apparatus 200 are located. If the brake case portion 220 is referred to as a part of the motor housing 100, this part also serves as the case of the brake apparatus. The integrated accommodating chamber 300 is defined with he motor housing 100 and the brake case portion 220 arranged in the motor housing 100 in such a manner for accommodating the inter components of the motor 1000 and the inter components of the brake apparatus 200. Specifically, the brake assembly 210 is arranged in the region of the accommodating chamber 300 that is aligned to the brake case portion 220. Compared with astructure having a motor housing and a brake apparatus with a standalone brake case disposed within the motor housing (for example, the brake apparatus having the brake case is arranged at the rear of the motor housing as a standalone apparatus) . The embodiments of the present disclosure simplify the structure of the motor, reduce the costs accordingly, provide a larger space inside the motor for the assembly of the brake assembly, and also improve the flexibility of the assembly of the brake assembly.
[0042] As shown in FIG. 3-FIG. 5, the motor 1000 further includes a bearing 500. The brake case portion 220 includes a sleeve 221 and a support plate 222, where the support plate 222 may be arranged perpendicular to the axis of the brake case portion 220. As shown in FIG. 2, the axis of the brake case portion 220 can be aligned to the overall axis of the motor 1000. The support plate 222 may be arranged perpendicular to the axis, that is, a plane where the support plate 222 is located may be perpendicular to the axis.
[0043] Further, as shown in FIG. 8-FIG. 10, the support plate 222 has two sides. The sleeve 221 is arranged on the side of the support plate 222 facing the first case portion 110, and the axis of the sleeve 221 may be aligned to the axis of the brake case portion 220. That is, the center of sleeve 221 may be the center of the brake case portion 220, as shown in FIG. 9. Therefore, it is understandable that the axis of the motor 1000, the axis of the sleeve 221, and the axis of the brake case portion 220 are aligned to one another, thereby ensuring that eccentric vibration will not occur during rotation of the rotating shaft 400 in the accommodating chamber 300, and ensuring the operating stability of the motor 1000.
[0044] As shown in FIG. 10, the sleeve 221 includes a first tubular segment 2211 and a second tubular segment 2212 sequentially arranged along the axial direction of the motor 1000, the inner diameter of the second tubular segment 2212 is smaller than the inner diameter of the first tubular segment 2211, and the bearing 500 is arranged in the first tubular segment 2211 and abuts an end face of the second tubular segment 2212.
[0045] Hence, the inner diameter of the first tubular segment 2211 is greater than the inner diameter of the second tubular segment 2212. Therefore, a step surface is formed at the junction between the first tubular segment 2211 and the second tubular segment 2212 due to the difference between the inner diameters. The bearing 500 is arranged in the first tubular segment 2211 and abuts the step surface, thereby ensuring that the position of the bearing 500 is stable and preventing the bearing 500 from moving toward the left side in FIG. 10 in the sleeve 221. The rotating shaft 400 passing through the brake apparatus 200 also passes through the bearing 500. Thus, the rotation smoothness of the rotating shaft 400 is improved through the bearing 500.
[0046] Further, as shown in FIG. 10, the outer diameter of the first tubular segment 2211 is equal to the outer diameter of the second tubular segment 2212. That is, the outer peripheral surface of the first tubular segment 2211 and the outer peripheral surface of the second tubular segment 2212 can be integrated. The outer peripheral surfaces are smoothly and seamlessly connected without any difference in size.
[0047] In other embodiments of the present disclosure, the outer diameter of the first tubular segment 2211 may be different from the outer diameter of the second tubular segment 2212. That is, the outer diameter of the second tubular segment 2212 may be smaller than the outer diameter of the first tubular segment 2211, so that a matching armature of the motor can be manufactured in subsequent manufacturing procedure. Therefore, when the armature is subsequently installed at the sleeve 221, the outside of the second tubular segment 2212 can be provided with more windings, thereby further improving the braking effect of the brake apparatus 200.
[0048] As shown in FIG. 10, a first annular groove 2213 is provided on an inner wall surface of the first tubular segment 2211, and the radial dimension of the first annular groove 2213 is larger than the inner diameter of the first tubular segment 2211. As shown in FIG. 4, the brake apparatus 200 further includes a snap spring 240, where the snap spring 240 is arranged in the first annular groove 2213 and abuts the inner wall of the first annular groove 2213, and the inner diameter of the snap spring 240 is smaller than the inner diameter of the first tubular segment 2211.
[0049] Specifically, the first annular groove 2213 with the diameter greater than the inner diameter of the first tubular segment 2211 is provided on the inner wall of the first tubular segment 2211 so as to accommodate the snap spring 240 in the first annular groove 2213. The structure of the snap spring 240 is as shown in FIG. 4. Those skilled in the art can understand the structure of the snap spring 240 with no more details. With the aid of a tool, the two perforated ends of the snap spring 240 (as shown in FIG. 4) can be abutted together, so that the snap spring 240 forms a circular ring with a smaller diameter. In this state, the snap spring 240 can be placed in the first annular groove 2213. When the snap spring 240 is loosened, due to the elasticity of the snap spring 240, the two ends of the snap spring 240 are pulled apart, thereby restoring to the original state of the snap spring 240, that is, a circular structure with an opening between the two ends as shown in FIG. 4. The snap spring 240 may abut the inner wall of the first annular groove 2213 in this state.
[0050] Further, because the inner diameter of the snap spring 240 is smaller than the inner diameter of the first tubular segment 2211, there is also a size difference between the inner diameter of the snap spring 240 and the inner diameter of the first tubular segment 2211, and the snap spring 240 can serve as a stop plate or a baffle, thereby limiting the movement of the bearing 500 on the right side in FIG. 10. It is appreciable, in combination with the above description, that the bearing 500 is confined in the first tubular segment 2211 by the second tubular segment 2212 and the snap spring 240, thereby avoiding positional shifts of the bearing 500.
[0051] In addition, the bearing 500 is assembled in the first tubular segment 2211 according to an embodiment of the present disclosure (the space defined in the first tubular segment 2211 serves as the assembly position of the bearing 500) . Thus, the bearing 500 is disposed within the brake case portion 220. Compared with the structure with a bearing disposed outside a brake case portion, a matching bearing seat is not needed for the bearing 500 according to the embodiment, thereby simplifying the machining of the motor. The assembly position of the bearing 500 can be integrally formed and machined on the brake case portion 220, thereby improving the production efficiency, achieving a compact structure, and shortening the overall length of the motor 1000.
[0052] As shown in FIG. 6 and FIG. 7, the brake assembly 210 further includes a motor armature 211, an end plate member 212, a brake disc 213, a movable core 214, and an elastic member 215. The motor armature 211 is sleeved on an outer peripheral surface of the sleeve 221. Because the outer diameter of the first tubular segment 2211 is equal to the outer diameter of the second tubular segment 2212 of the sleeve 221, the motor armature 211 is sleeved on the outer peripheral surface of the sleeve 221 without additional machining, and can be firmly sleeved on an outer periphery of the sleeve 221.
[0053] As shown in FIG. 7, the end plate member 212 is directly connected to one side of the brake case portion 220 facing the first case portion 110. Therefore, the end plate member 212 in combination with the brake case portion 220 defines a closed space, and the brake assembly 210 is located in this closed space, to prevent positional deviation of the brake assembly 210.
[0054] As shown in FIG. 7, the brake disc 213 is located between the motor armature 211 and the end plate member 212, and the brake disc 213 is sleeved on an outer peripheral surface of the rotating shaft 400, and is engaged with the outer peripheral surface of the rotating shaft 400. The movable core214 is located between the brake disc 213 and the motor armature 211. One end of the elastic member 215 is arranged in the braking region 230, and the other end of the elastic member 215 abuts one side of the movable core214 that is away from the brake disc 213.
[0055] Hence, it is understandable that, as shown in FIG. 7, the brake assembly 210 includes the end plate member 212, the brake disc 213, the movable core 214, and the motor armature 211 wich are sequentially assembled from the left side to the right direction in FIG. 7. The movable core214 is connected to the brake case portion 220 through the elastic member 215 so that the position of the movable core 214 can be adjusted by the elastic force of the elastic member 215.
[0056] The working principle of the brake assembly 210 is as follows:
[0057] when the motor 1000 is powered on, the elastic member 215 is compressed through the movable core 214 by an electromagnetic force of the motor armature 211, so that the brake disc 213 is separated from the movable core 214 and rotates with the rotating shalt 400. When the motor 1000 is powered off, the elastic member 215 is released with disappearance of the electromagnetic force of the motor armature 211, to push the movable core 214 through the elastic member 215 to press the brake disc 213 until the brake disc comes into contact with the end plate member 212, thereby locking the rotating shaft 400.
[0058] Specifically, the motor armature 211, when being powered on, will generate the electromagnetic force. It is understandable for those skilled in the art that the movable core 214 will be pushed by the electromagnetic force generated by the motor armature 211 in a left-to-right direction in FIG. 7, so that the movable core 214 compresses the elastic member 215. It is also understandable that the electromagnetic force generated by the motor armature 211 when being powered on is rightward in FIG. 7, the elastic force of the elastic member 215 is leftward in FIG. 7, and the electromagnetic force overcomes the elastic force, so that the movable core 214 is pushed apart from the brake disc 213. Therefore, the brake disc 213 is released to rotate with the rotating shaft 400. When the motor 1000 is powered off, the electromagnetic force generated by the motor armature 211 disappears, and the movable core 214 is pushed leftward by the elastic force of the elastic member 215, so that the movable core pushes the brake disc 213 leftward. Because the position of the end plate member 212 is fixed, the movable core 214 presses the brake disc 213 onto the end plate member 212, thereby causinga friction force between the brake disc 213 and the end plate member 212. Therefore, the brake disc 213 is stopped from rotating. Because the brake disc 213 is engaged with the rotating shaft 400, after the brake disc 213 is stopp, the rotating shaft 400 is also stopped from rotating. As a result, the motor 1000 is braked.
[0059] Further, as shown in FIG. 7, the motor 1000 further includes a heat dissipation block 700. The heat dissipation block 700 is formed with an over molding material overmolded between the motor armature 211 and the brake case portion 220. Specifically, the motor armature 211, when being powered on, will generate the electromagnetic force whist generating heat, thereby resulting in a rise in the temperature of the braking assembly 210. The temperature rise may reduce the braking effect of the brake assembly 210. Therefore, the heat of the motor armature 211 can be dissipated through the heat dissipation block 700, to achieve heat dissipation of the motor armature 211.
[0060] In some embodiments of the present disclosure, the over molding material of the heat dissipation block 700 is a unified encapsulating material for the motor 1000. Specifically, epoxy resin can be used to encapsulate the motor armature 211 of the brake apparatus 200 and the motor housing 100 (specifically the brake case portion 220) together, thereby not only improving the overall stability of the motor 1000, but also enhancing the heat dissipation performance of the brake apparatus 200.
[0061] In some embodiments of the present disclosure, silicone rubber or polyurethane resin may also be used as the over molding material of the heat dissipation block 700, thereby achieving heat dissipation of the motor armature 211, and improving the heat dissipation performance of the brake apparatus 200.
[0062] As shown in FIG. 5-FIG. 7, the motor 1000 further includes a fitting piece 600. The fitting piece 600 is sleeved on the rotating shaft 400, a first engaging part 610 is provided on the outer peripheral surface of the fitting piece 600. The fitting piece 600 and the brake disc 213 are located at the same position in the axial direction of the motor 1000. A through hole may be provided in the central area of the brake disc 213. A second engaging part 2131 may be provided on the inner circumference of the through hole, and the brake disc 213 is sleeved on the outer periphery of the fitting piece 600 so that the second engaging part 2131 is engaged with the first engaging part 610.
[0063] In other words, the fitting piece 600 may have engaging teeth on the outer peripheral surface, i.e., the first engaging part 610. The fitting piece 600 can be arranged at a position corresponding to the brake disc 213. The through hole is provided in the central area of the brake disc 213, and the second engaging part 2131, which may be in the form of engaging teeth as shown in FIG. 7, are provided on the inner circumference of the through hole.
[0064] As shown in FIG. 5-FIG. 7, the motor 1000 further includes a fitting piece 600, the fitting piece 600 is sleeved on the rotating shaft 400, a first engaging part 610 is provided on the outer peripheral surface of the fitting piece 600, the position of the fitting piece 600 is aligned to the position of the brake disc 213, a through hole is provided in the central area of the brake disc 213, a second engaging part 2131 is provided on the inner circumference of the through hole, and the brake disc 213 is sleeved on the outer periphery of the fitting piece 600, so that the second engaging part 2131 is engaged with the first engaging part 610.
[0065] Specifically, engaging teeth (i.e., the first engaging part 610) may be provided on the outer peripheral surface of the fitting piece 600. The through hole is provided on the brake disc 213, and engaging teeth (i.e., the second engaging part 2131) are also provided at a hole edge of the through hole. When the rotating shaft 400 passes through the brake assembly 210, the fitting piece 600 is engaged with the brake disc 213 through the first engaging part 610 and the second engaging part 2131. Therefore, after the motor 1000 is powered on, the brake disc 213 can rotate with the rotating shaft 400. When the motor 1000 is powered off, the brake disc 213 is stopped from rotating due to the friction force, and the rotating shaft 400 is also stopped from rotating due to the engagement between the second engaging part 2131 of the brake disc 213 and the first engaging part 610 of the fitting piece 600, thereby braking the motor 1000.
[0066] As shown in FIG. 6 and FIG. 7, a third wire pass through opening 2121 is provided at an edge of the end plate member 212, a fourth wire pass through opening 2141 is provided at an edge of the movable core 214, and a height of the third wire pass through opening 2121 is higher than a height of the fourth wire pass through opening 2141.
[0067] Specifically, in order to achieve insulation, an enameled wire is generally used as a coil assembly 217, that is, a metal wire is coated outside. The third wire pass through opening 2121 and the fourth wire pass through opening 2141 can be configured to allow the coil assembly 217 to pass through for connection to an external power source. The third wire pass through opening 2121 is higher than the fourth wire pass through opening 2141, to elevate the height of the coil assembly 217, and prevent the coil assembly 217 from contacting the fourth wire pass through opening 2141. Due to the movement of the movable core214 in the left-right direction in FIGs 6 and 7, the third wire pass through opening 2121 is higher than the fourth wire pass through opening 2141, to prevent the movable core 214 from contacting with the coil assembly 217 during movement, and from wearing the rubber coating on an outer surface of the coil assembly 217.
[0068] In addition, as shown in FIG. 2, it is understandable that the motor armature 211 further includes the coil assembly 217. A first wire pass through opening 111 is provided on the first case portion 110, and the first wire pass through opening 111 is configured to allow a first wiring terminal 2171 of the coil assembly 217 to pass through. As can be seen from the above text, it is understandable that the first case portion 110 is located on the left side of the brake case portion 220 relative to the brake case portion 220. In other words, the first wire pass through opening 111 is also located on the left side of the brake case portion 220. Therefore, the coil assembly 217 can sequentially pass through the fourth wire pass through opening 2141 and the third wire pass through opening 2121, and achieve electrical connection to the external power source through the first wire pass through opening 111.
[0069] Compared with the structure having a wire pass through opening provided on the second case portion of the motor for the coil assembly to pass through so that the coil assembly is electrically connected to the external power source, the first wire pass through opening 111 is additionally provided on the first case portion 110 according to the embodiment of this disclosure discussed above. The coil assembly 217 can directly pass through the first wire pass through opening 111 with no need for a wire pass through opening provided on the brake case portion 220. Therefore, in the subsequent encapsulating process for manufacturing the motor, quick encapsulation can be achieved without the need for an additional operation, thereby improving the manufacturing efficiency. By contrast, the structure having the wire pass through opening provided on the second case portion of the motor requires to firstly block the wire pass through opening of the brake case portion in the encapsulating process of the motor, , which renders the manufacturing of the motor complex.
[0070] As shown in FIG. 7, the motor armature 211 further includes an insulation skeleton 216. The insulation skeleton 216 is sleeved on the outer peripheral surface of the sleeve 221, and a second annular groove 2161 is provided on an outer peripheral surface of the insulation skeleton 216. The insulating skeleton 216 can serve for insulation. The coil assembly 217 winds around the second annular groove 2161, and the first wiring terminal 2171 of the coil assembly 217 can be electrically connected to the external power source. After the insulation skeleton 216 and the coil assembly 217 are assembled in the braking region 230, the insulation skeleton 216 and the coil are encapsulated in the braking region 230 with a pouring sealant.
[0071] In addition, the motor 1000 further includes a second wiring terminal (not shown in the figure) , which is a terminal of a connecting wire for electrical connection of the motor 1000 to the external power source, and can pass through the first wire pass through opening 111 for electrical connection to the external power source. That is, the wiring terminal of the motor 1000 is defined as the second wiring terminal, which can also pass through the first wire pass through opening 111 for electrical connection to the external power source, thus, rendering the assembly of the motor 1000 convenient and efficient, and a wire pass through opening provided on the brake case portion 220 is also avoided.
[0072] In some embodiments of the present disclosure, as shown in FIG. 8, the brake case portion 220 may include a bolt hole 223 and a spring hole 224 that are integrally formed with the brake case portion, where the bolt hole 223 is configured to connect to the end plate member 212 through a bolt, and the spring hole 224 is configured to accommodate the elastic member 215.
[0073] Specifically, as shown in FIG. 7, the end plate member 212 can be connected to the brake case portion 220 through the bolt. Therefore, the bolt hole 223 can be integrally formed on the brake case portion 220, to ensure that the position of the bolt hole 223 is constant, and keep a stable connection between the end plate member 212 and the brake case portion 220. The spring hole 224 is provided on the brake case portion 220, so that the assembly position of the spring is constant, to prevent the spring from positional deviation when the force applied on the spring is changed. In addition, the brake case portion 220 includes the bolt hole 223 and the spring hole 224 which are integrally formed with the brake case portion, thereby reducing the manufacturing costs, and simplifying the machining of the motor.
[0074] In addition, as shown in FIG. 2, other electrical components or apparatus such as a controller, may be provided in the second case portion 120 of the motor 1000. The second wire pass through opening 121 may be provided on the second case portion 120 so that the wiring of the controller, can pass through the second wire pass through opening 121 for electrical connection to the external power source.
[0075] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily request or imply existence of any actual relationship or sequence between these entities or operations. Further, the terms such as "comprising" , "including" or any other variation thereof are intended to encompass non-exclusive inclusions, such that a process, a method, an article, or a device that includes a series of elements not only includes those elements, but also includes other elements that are not explicitly listed, or further includes elements that are inherent to such a process, a method, an article, or a device. In the absence of more constraints, an element defined by the wording "comprises a ... " does not preclude the existence of other identical elements in the process, the method, the article, or the device that includes the element.
[0076] Finally, it should be noted that: only preferred embodiments of the present disclosure are provided above to merely show the technical solutions of the present disclosure, and are not intended to limit the scope of protection of the present disclosure. Any modification, equivalent replacement, improvement, and the like made within the spirit and principle of the present disclosure should be encompassed within the scope of protection of the present disclosure.
Claims
1.A motor (1000) having a brake apparatus, comprising:a motor housing (100) , the motor housing (100) comprising a first case portion (110) and a second case portion (120) ;the brake apparatus (200) , the brake apparatus (200) comprising a brake case portion (220) and a brake assembly (210) , wherein the first case portion (110) , the brake case portion (220) , and the second case portion (120) are sequentially arranged along an axial direction of the motor (1000) to define an accommodating chamber (300) , a region where the accommodating chamber (300) is aligned to the brake case portion (220) is a braking region (230) , the brake assembly (210) is arranged in the braking region (230) , the brake assembly (210) is directly connected to the brake case portion (220) ; anda rotating shaft (400) , wherein the rotating shaft (400) is arranged in the accommodating chamber (300) , and the rotating shaft (400) extends from the first case portion (110) to the second case portion (120) through the brake assembly (210) and the brake case portion (220) .2.The motor according to claim 1, wherein the motor (1000) further comprises a bearing (500) , the brake case portion (220) comprises a sleeve (221) and a support plate (222) , the sleeve (221) is arranged on one side of the support plate (222) facing the first case portion (110) , the sleeve (221) comprises a first tubular segment (2211) and a second tubular segment (2212) sequentially arranged along the axial direction of the motor (1000) , an inner diameter of the second tubular segment (2212) is smaller than an inner diameter of the first tubular segment (2211) , and the bearing (500) is arranged in the first tubular segment (2211) and abuts an end face of the second tubular segment (2212) .3.The motor according to claim 2, wherein an outer diameter of the first tubular segment (2211) is equal to an outer diameter of the second tubular segment (2212) .4.The motor according to claim 2, wherein a first annular groove (2213) is provided on an inner wall surface of the first tubular segment (2211) , and a radial dimension of the first annular groove (2213) is larger than the inner diameter of the first tubular segment (2211) ; andthe brake apparatus (200) further comprises a snap spring (240) , wherein the snap spring (240) is arranged in the first annular groove (2213) and abuts an inner wall of the first annular groove (2213) , and an inner diameter of the snap spring (240) is smaller than the inner diameter of the first tubular segment (2211) .5.The motor according to any one of claims 1-4, wherein the brake assembly (210) further comprises:a motor armature (211) , wherein the motor armature (211) is sleeved on an outer peripheral surface of the sleeve (221) ;an end plate member (212) , wherein the end plate member (212) is directly connected to one side of the brake case portion (220) facing the first case portion (110) ;a brake disc (213) , wherein the brake disc (213) is located between the motor armature (211) and the end plate member (212) , and the brake disc (213) is sleeved on an outer peripheral surface of the rotating shaft (400) , and is engaged with the outer peripheral surface of the rotating shaft (400) ;a movable core (214) , wherein the movable core (214) is located between the brake disc (213) and the motor armature (211) ; andan elastic member (215) , wherein one end of the elastic member (215) is arranged in the braking region (230) , and the other end of the elastic member (215) abuts one side of the movable core (214) away from the brake disc (213) ,wherein, when the motor (1000) is powered on, the elastic member (215) is compressed through the movable core (214) by an electromagnetic force of the motor armature (211) , so that the brake disc (213) is separated from the movable core (214) and rotates with the rotating shalt (400) ; and when the motor (1000) is powered off, the elastic member (215) is released with disappearance of the electromagnetic force of the motor armature (211) , to push the movable core (214) through the elastic member (215) to press the brake disc (213) until the brake disc (213) comes into contact with the end plate member (212) , thereby locking the rotating shaft (400) .6.The motor according to claim 5, wherein the motor further comprises:a heat dissipation block (700) , wherein the heat dissipation block (700) is formed with an over molding material overmolded between the motor armature (211) and the brake case portion (220) .7.The motor according to claim 6, wherein the motor armature (211) comprises a coil assembly (217) , a first wire pass through opening (111) is provided on the first case portion (110) , and the first wire pass through opening (111) is configured to allow a first wiring terminal (2171) of the coil assembly (217) to pass through.8.The motor having a brake apparatus according to claim 5, wherein a third wire pass through opening (2121) is provided at an edge of the end plate member (212) , a fourth wire pass through opening (2141) is provided at an edge of the movable core (214) , and a height of the third wire pass through opening (2121) is higher than a height of the fourth wire pass through opening (2141) .9.The motor according to claim 5, wherein the motor (1000) further comprises a fitting piece (600) , the fitting piece (600) is sleeved on the rotating shaft (400) , a first engaging part (610) is provided on an outer peripheral surface of the fitting piece (600) , a through hole is provided in a central area of the brake disc (213) , a second engaging part (2131) is provided on an inner circumference of the through hole, and the brake disc (213) is sleeved on an outer periphery of the fitting piece (600) , so that the second engaging part (2131) is engaged with the first engaging part (610) .10.The motor having a brake apparatus according to any one of claims 7-9, wherein the motor (1000) further comprises a second wiring terminal, which is configured to be electrically connected to an external power source through the first wire pass through opening (111) .11.The motor according to any one of claims 5-9, wherein the brake case portion (220) comprises a bolt hole (223) and a spring hole (224) that are integrally formed with the brake case portion (220) , wherein the bolt hole (223) is configured to connect to the end plate member (212) through a bolt, and the spring hole (224) is configured to accommodate the elastic member (215) .
Citation Information
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