An integrated structure of an axial magnetic field motor and a permanent magnet brake

Abstract

The present invention provides an integrated structure of an axial magnetic field motor and a permanent magnet brake, comprising a rotor assembly, a rotor shaft, a brake armature and a magnetic steel, wherein the rotor shaft comprises a shaft portion and a back iron, the back iron is connected to the shaft portion, the brake armature comprises an armature plate and a spring leaf, the armature plate and the spring leaf are both sleeved on the shaft portion, the spring leaf is connected between the back iron and the armature plate, so that the armature plate moves under the action of an external force, the magnetic steel is fixed on the back iron and is located on the side of the back iron away from the brake armature; the stator assembly comprises a stator core and a stator winding, the stator winding is fixed on the stator core, the stator core is sleeved on the shaft portion, and the side of the stator core fixing the stator winding is arranged opposite to the magnetic steel; the brake stator assembly is sleeved on the shaft portion, and cooperates with the armature plate to brake the rotor assembly, so that the axial dimension of the integrated structure is further shortened to meet the limited installation space of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to an integrated structure of an axial magnetic field motor and a permanent magnet brake. Background Art

[0002] The joint module of the robot arm is driven by a motor, and a brake is required to keep the position when the power is off. The existing motor and brake are two independent structures, which makes the overall axial dimension of the assembly longer. In addition, most robot arms are multi-axis, such as four-axis, six-axis and seven-axis, which limits the installation space of the motor and cannot be applied to the above-mentioned assembly structure with a long axial dimension. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an integrated structure of an axial magnetic field motor and a permanent magnet brake with a short axial dimension and a compact structure.

[0004] An integrated structure of an axial magnetic field motor and a permanent magnet brake, comprising:

[0005] A rotor assembly, comprising a rotor shaft, a brake armature and a plurality of magnetic steels, wherein the rotor shaft comprises a shaft portion and a back iron, wherein the back iron is connected to the shaft portion, wherein the brake armature comprises an armature plate and a spring leaf, wherein both the armature plate and the spring leaf are sleeved on the shaft portion, wherein the spring leaf is connected between the back iron and the armature plate so that the armature plate moves under the action of an external force, wherein the magnetic steel is fixed on the back iron and is located on a side of the back iron away from the brake armature;

[0006] A stator assembly, comprising a stator core and a stator winding, wherein the stator winding is fixed on the stator core, the stator core is sleeved on the shaft, and a side of the stator core fixing the stator winding is arranged opposite to the magnetic steel;

[0007] The brake stator assembly is sleeved on the shaft portion and cooperates with the armature plate to brake the rotor assembly.

[0008] Furthermore, the connection point between the reed and the armature plate is staggered with the connection point between the reed and the back iron.

[0009] Furthermore, there are multiple connection points between the reed and the armature plate, which are spaced apart along the outer periphery of the reed; there are multiple connection points between the reed and the back iron, which are spaced apart along the outer periphery of the reed; and the connection point between the reed and the armature plate is located between two adjacent connection points between the reed and the back iron.

[0010] Furthermore, the reed is fixed to the armature plate by a first fastener, and the reed is fixed to the back iron by a second fastener, and the first fastener and the second fastener are staggered, and an avoidance hole for avoiding the second fastener is opened on the armature plate.

[0011] Furthermore, the brake stator assembly includes a permanent magnet, a winding and a friction plate, the winding is located between the permanent magnet and the friction plate, and when the permanent magnet, the winding and the friction plate are sleeved on the shaft, the friction plate is arranged opposite to the armature plate.

[0012] Furthermore, the brake stator assembly also includes a base plate, the permanent magnet, the winding and the friction plate are sleeved on the base plate, and the base plate is sleeved on the shaft.

[0013] Furthermore, the bottom plate includes a base and a sleeve portion, the base and the sleeve portion are connected, the permanent magnet, the winding and the friction plate are all sleeved on the sleeve portion, and the permanent magnet is located between the base and the winding.

[0014] Furthermore, the brake stator assembly also includes a side ring, which is sleeved outside the sleeve portion and located between the friction plate and the permanent magnet, so that the winding is fixed inside the side ring.

[0015] Furthermore, the side ring includes a side ring bottom and a side ring wall portion, the outer wall of the side ring bottom extends to form the side ring wall portion, the side ring bottom is sleeved on the shaft portion so that the permanent magnet is fixed between the bottom plate and the side ring bottom, the side ring wall portion is located on the side of the side ring bottom away from the permanent magnet, the winding is sleeved between the shaft portion and the side ring wall portion, and the friction plate is sleeved between the shaft portion and the side ring wall portion.

[0016] Furthermore, the armature plate, the bottom plate and the side ring are made of magnetic conductive material.

[0017] Compared with the prior art, this technical solution has the following advantages:

[0018] The reed is connected between the armature plate and the back iron, and the connection point of the reed and the armature plate is offset from the connection point of the reed and the back iron, so that the reed can be stretched, and then the armature plate can move when subjected to an external force, and then cooperate with the brake stator assembly to realize the braking of the rotor assembly, with a compact and novel structure. In addition, the stator assembly and the brake stator assembly are integrated on the shaft portion of the rotor assembly, so that the axial dimension of the integrated structure is further shortened to meet the limited installation space of the motor. In addition, the back iron of the rotor assembly mounts the brake armature to cooperate with the brake stator assembly to realize the braking of the rotor assembly, further shortening the axial dimension of the integrated structure.

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. Brief Description of the Drawings

[0020] Figure 1 is an exploded view of a preferred embodiment of the integrated structure of the axial magnetic field motor and the permanent magnet brake according to the present invention;

[0021] Figure 2 is a schematic structural view of the above-mentioned preferred embodiment of the integrated structure of the axial magnetic field motor and the permanent magnet brake according to the present invention;

[0022] Figure 3 is a cross-sectional view of the above-mentioned preferred embodiment of the integrated structure of the axial magnetic field motor and the permanent magnet brake according to the present invention;

[0023] Figure 4 is a schematic structural view of a preferred embodiment of the rotor assembly according to the present invention;

[0024] Figure 5 is a cross-sectional view of the above-mentioned preferred embodiment of the rotor assembly according to the present invention;

[0025] Figure 6 is a schematic structural view of a preferred embodiment of the rotor shaft according to the present invention;

[0026] Figure 7 is a schematic structural view of a preferred embodiment of the brake armature according to the present invention;

[0027] Figure 8 is a cross-sectional view of the above-mentioned preferred embodiment of the brake armature according to the present invention;

[0028] Figure 9 is a schematic structural view of a preferred embodiment of the reed according to the present invention;

[0029] Figure 10It is a schematic structural diagram of the assembly of the rotor shaft and the brake armature according to the present invention;

[0030] Figure 11 It is a cross-sectional view of the assembly of the rotor shaft and the brake armature according to the present invention;

[0031] Figure 12 It is a schematic structural diagram of a preferred embodiment of the stator assembly according to the present invention;

[0032] Figure 13 It is a schematic structural diagram of a preferred embodiment of the stator core according to the present invention;

[0033] Figure 14 It is a schematic structural diagram of a preferred embodiment of the brake stator assembly according to the present invention;

[0034] Figure 15 It is a cross-sectional view of the above-mentioned preferred embodiment of the brake stator assembly according to the present invention;

[0035] Figure 16 It is a schematic structural diagram of the integrated structure of the axial magnetic field motor and the permanent magnet brake in the non-operating mode according to the present invention;

[0036] Figure 17 It is a schematic structural diagram of the integrated structure of the axial magnetic field motor and the permanent magnet brake in the operating mode according to the present invention. Detailed implementation manners

[0037] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description of the present invention can be applied to other implementation schemes, variation schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present invention.

[0038] Those skilled in the art should understand that in the disclosure of the present invention, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on the present invention.

[0039] It will be understood that the term "a" should be construed as "at least one" or "one or more". That is, in one embodiment, the number of an element may be one, while in other embodiments, the number of the element may be multiple. The term "a" should not be construed as a limitation on the quantity.

[0040] As Figures 1 to 15 shown, the integrated structure of the axial magnetic field motor and the permanent magnet brake includes:

[0041] A rotor assembly 100, including a rotor shaft 110, a brake armature 120, and a plurality of magnetic steel 130. The rotor shaft 110 includes a shaft portion 111 and a back iron 112. The back iron 112 is connected to the shaft portion 111. The brake armature 120 includes an armature plate 121 and a reed 122. Both the armature plate 121 and the reed 122 are sleeved on the shaft portion 111. The reed 122 is connected between the back iron 112 and the armature plate 121 so that the armature plate 121 moves under the action of an external force. The magnetic steel 130 is fixed on the back iron 112 and is located on the side of the back iron 112 away from the brake armature 120;

[0042] A stator assembly 200, including a stator core 210 and a stator winding 220. The stator winding 220 is fixed on the stator core 210. The stator core 210 is sleeved on the shaft portion 111, and the side of the stator core 210 where the stator winding 220 is fixed is disposed opposite to the magnetic steel 130;

[0043] A brake stator assembly 300, sleeved on the shaft portion 111 and disposed opposite to the armature plate 121, so that when the stator winding 220 and the brake stator assembly 300 are not energized, the brake stator assembly 300 adsorbs the armature plate 121 to brake the rotor assembly 100.

[0044] Since the stator assembly 200 and the brake stator assembly 300 are integrated on the shaft portion 111 of the rotor assembly 100, the axial dimension of the integrated structure is further shortened to meet the limited installation space of the motor. In addition, the back iron 112 of the rotor assembly 100 mounts the brake armature 120 to cooperate with the brake stator assembly 300 to brake the rotor assembly 100, further shortening the axial dimension of the integrated structure.

[0045] As Figures 1 to 3 、 Figure 14 and Figure 15As shown, the brake stator assembly 300 includes a permanent magnet 320, a winding 340, and a friction plate 350. The winding 340 is located between the permanent magnet 320 and the friction plate 350. The permanent magnet 320, the winding 340, and the friction plate 350 are all in an annular structure. When the three are sleeved on the shaft portion 111, the friction plate 350 is disposed opposite to the armature plate 121, and there is a gap b between the friction plate 350 and the armature plate 121. Refer to Figure 3 .

[0046] The permanent magnet 320 is made of hard magnetic material and has magnetism. The friction plate 350 is made of a material with a large friction coefficient and is used for frictional braking. When the winding 340 is not energized, the armature plate 121 is adsorbed on the friction plate 350, thereby achieving frictional braking of the rotor assembly 100 to prevent the rotor assembly 100 from rotating. At this time, there is a gap b between the friction plate 350 and the armature plate 121. When the winding 340 is energized, a magnetic field is generated to separate the armature plate 121 from the friction plate 350. At this time, there is a gap b between the friction plate 350 and the armature plate 121.

[0047] It should be noted that the suction force of the permanent magnet 320 on the armature plate 121 is greater than the pulling force of the reed 122 on the armature plate 121, so that the armature plate 121 can be adsorbed on the friction plate 350 when the winding 340 is not energized.

[0048] As Figure 14 and Figure 15 shown, the brake stator assembly 300 further includes a bottom plate 310. The permanent magnet 320, the winding 340, and the friction plate 350 are sleeved on the bottom plate 310, and the bottom plate 310 is sleeved on the shaft portion 111 so that the friction plate 350 is disposed opposite to the armature plate 121.

[0049] Specifically, the bottom plate 310 is in an annular structure for sleeving the shaft portion 111. It includes a base portion 311 and a socket portion 312. The base portion 311 and the socket portion 312 are connected, and both are hollow and coaxially arranged to form the annular structure of the bottom plate 310. The cross-sections of the base portion 311 and the socket portion 312 are both annular, and the diameter of the base portion 311 is greater than that of the socket portion 312. The permanent magnet 320, the winding 340, and the friction plate 350 are all sleeved on the socket portion 312. Among them, the base portion 311, the permanent magnet 320, the winding 340, and the friction plate 350 are arranged from right to left. Refer to Figure 15 .

[0050] The aforementioned base portion 311 and the sleeve portion 312 may be integrally formed.

[0051] Continue to refer Figure 14 and Figure 15 The brake stator assembly 300 further includes a side ring 330 , which is sleeved outside the sleeve portion 312 and located between the friction plate 350 and the permanent magnet 320 , so that the winding 340 is fixed inside the side ring 330 .

[0052] Specifically, the friction plate 350 is sleeved between the side ring 330 and the sleeve portion 312. Figure 15 The side ring 330 includes a side ring bottom 331 and a side ring wall 332. The side ring bottom 331 is annular. The outer wall of the side ring bottom 331 extends to form a side ring wall 332. The side ring bottom 331 is sleeved on the shaft 111 so that the permanent magnet 320 is fixed between the bottom plate 310 and the side ring bottom 331. The side ring wall 332 is located on the side of the side ring bottom 331 away from the permanent magnet 320. The winding 340 is sleeved on the shaft 111 and located between the shaft 111 and the side ring wall 332. The friction plate 350 is sleeved between the shaft 111 and the side ring wall 332 so that the winding 340 is located between the friction plate 350 and the side ring bottom 331.

[0053] The side ring bottom portion 331 and the side ring wall portion 332 may be integrally formed.

[0054] When the brake stator assembly 300 is assembled, the permanent magnet 320, the side ring 330, the winding 340 and the friction plate 350 can be sleeved on the sleeve portion 312 in sequence to form the following: Figure 15 The structure shown.

[0055] The bottom plate 310 and the side ring 330 may be made of magnetic conductive materials. When the permanent magnet 320 and the stator winding 220 are not energized, the permanent magnet 320 is used as the source of the magnetic field to form a magnetic circuit through the bottom plate 310 , the side ring 330 and the armature plate 121 , thereby causing the armature plate 121 to be adsorbed on the friction plate 350 .

[0056] like Figures 1 to 6 As shown, the rotor shaft 100 includes a shaft portion 111 and a back iron 112, and the back iron 112 is connected to the shaft portion 111. The cross-sections of the shaft portion 111 and the back iron 112 are both circular, the diameter of the back iron 112 is larger than the diameter of the shaft portion 111, and the shaft portion 111 and the back iron 112 can be coaxially arranged. Figure 4, the back iron 112 can be located at the middle position of the shaft portion 111, so that the stator assembly 200 and the brake stator assembly 300 are sleeved on the shaft portion 111 and are located on both sides of the back iron 112. Refer to Figure 1 and Figure 2 .

[0057] As Figure 1 and Figure 4 described, a plurality of the magnetic steel 130 are all fixed on the same side of the back iron 112, and a plurality of the magnetic steel 130 are arranged around the shaft portion 111, so that a plurality of the magnetic steel 130 are arranged in a ring shape. Among them, the magnetic steel 130 can be in a fan-shaped structure.

[0058] As Figures 1 to 5 , Figures 7 to 11 shown, the brake armature 120 is sleeved on the shaft portion 111 and is located on the side of the back iron 112 away from the magnetic steel 130. The brake armature 120 includes an armature plate 121 and a reed 122, and both the armature plate 121 and the reed 122 are in a ring shape, so that the assembled brake armature 120 can be sleeved on the shaft portion 111.

[0059] As Figure 3 , Figure 5 , Figures 7 to 11 shown, the reed 122 is respectively connected to the armature plate 121 and the back iron 112, and the connection point of the reed 122 and the armature plate 121 is staggered with the connection point of the reed 122 and the back iron 112, so that the reed 122 can be stretched, and further the armature plate 121 can move when being acted by an external force, for example, move along the axial direction of the shaft portion 111.

[0060] Specifically, the connection point of the reed 122 and the armature plate 121 is arranged at intervals with the connection point of the reed 122 and the back iron 112 in sequence. Among them, there are a plurality of connection points of the reed 122 and the armature plate 121, and they are arranged at equal intervals along the outer periphery of the reed 122. There are a plurality of connection points of the reed 122 and the back iron 112, and they are arranged at equal intervals along the outer periphery of the reed 122, and the connection point of the reed 122 and the armature plate 121 is located between two adjacent connection points of the reed 122 and the back iron 112.

[0061] More specifically, refer to Figure 3 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 11As shown, the reed 122 is fixed to the armature plate 121 by a first fastener 123, and the reed 122 is fixed to the back iron 112 by a second fastener 140, and the first fastener 123 and the second fastener 140 are arranged staggeredly. Since the first fastener 123 and the second fastener 140 are arranged staggeredly, when the armature plate 121 is acted on by an external force, the armature plate 121 can move a certain distance along the axial direction of the shaft portion 111.

[0062] Reference Figure 9 , a first set hole 1221 for the first fastener 123 to pass through and a second set hole 1222 for the second fastener 140 to pass through are formed in the reed 122, and the first set hole 1221 and the second set hole 1222 are arranged staggeredly.

[0063] A plurality of the first set holes 1221 are arranged at equal intervals along the periphery of the reed 122, and a plurality of the second set holes 1222 are arranged at equal intervals along the periphery of the reed 122, and one of the second set holes 1222 is arranged in two adjacent first set holes 1221, so that the first fastener 123 passing through the first set hole 1221 and the second fastener 140 passing through the second set hole 1222 are arranged staggeredly, so as to enable the reed 122 to stretch, thereby meeting the movement of the armature plate 121.

[0064] Continue to refer to Figure 9 , the number of the first set holes 1221 can be six, and every two of the first set holes 1221 form a group, so that the six first set holes 1221 form three groups, and the three groups are arranged at equal intervals along the periphery of the 122, and the two first set holes 1221 in each group are arranged in the radial direction of the reed 122.

[0065] Similarly, the number of the second set holes 1222 is also six, and every two of the second set holes 1222 form a group, so that the six second set holes 1222 form three groups, and the three groups are arranged at equal intervals along the periphery of the 122, and the second set holes 1222 are located between two adjacent first set holes 1221, and the two second set holes 1222 in each group are arranged in the radial direction of the reed 122.

[0066] Such as Figure 3 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 11As described above, the first fastener 123 may be a rivet, that is, the first fastener 123 passes through the second set hole 1222 on the reed 122 and is locked on the armature plate 121, thereby fixing the reed 122 and the armature plate 121.

[0067] As Figure 3 , Figure 5 , Figure 8 , Figure 9 and Figure 11 shown, the second fastener 140 may be a bolt. An avoidance hole 1211 for avoiding the bolt head is provided on the armature plate 121. That is, the second fastener 140 sequentially passes through the avoidance hole 1211 and the second set hole 1222 until it is screwed to the back iron 112 to realize the fixation of the reed 122 and the back iron 112. Since the avoidance hole 1211 avoids the head of the bolt, the second fastener 140 only serves to fix the reed 122 and the back iron 112 and will not affect the movement of the armature plate 121.

[0068] The aforementioned armature plate 121 may be made of a magnetic conductive material.

[0069] When assembling the brake armature 120 on the back iron 112, the reed 122 may be first fixed to the armature plate 121 by the first fastener 123, and then the reed 122 may be fixed to the back iron 112 by the second fastener 140.

[0070] As Figure 1 , Figure 2 , Figure 3 , Figure 12 and Figure 13 shown, the stator assembly 200 includes a stator core 210 and a stator winding 220. The stator core 210 has an annular structure. The stator core 210 is provided with a plurality of winding installation slots 211 along its radial direction, so that the stator core 210 is divided to form a plurality of tooth portions 212 for winding the stator winding 220. The stator winding 220 is wound around the outside of the tooth portions 212 along the installation slots 211.

[0071] The stator core 210 is sleeved outside the shaft portion 111, so that one side of the stator core 210 for fixing the stator winding 220 is arranged opposite to the permanent magnet 130, and an air gap a is maintained between the stator core 210 and the permanent magnet 130, so that the rotor assembly 100 rotates relative to the stator assembly 200.

[0072] As Figure 16As shown, the integrated structure of the axial magnetic field motor and the permanent magnet brake is in the non-operating mode. At this time, the stator winding 220 is not energized, the joint module has no power, and the winding 340 is also not energized. At this time, the permanent magnet 320 is the source of the magnetic field. A magnetic circuit is formed through the bottom plate 310, the side ring 330 and the armature plate 121, adsorbing the armature plate 121 on the surface of the friction plate 350 and maintaining a certain pressure. At this time, the gap b between the friction plate 350 and the armature plate 121 does not exist, and the static friction force is relied on to prevent the rotation of the rotor assembly 100, thereby ensuring the spatial position of the robotic arm and avoiding loosening.

[0073] As Figure 17 shown, the integrated structure of the axial magnetic field motor and the permanent magnet brake is in the operating mode. Among them, three-phase alternating current is passed into the stator winding 220 to provide power for the joint module. At the same time, direct current is passed into the winding 340. By controlling the magnitude and direction of the direct current, the magnetic field generated by the winding 340 is offset from the magnetic field of the permanent magnet 320. At this time, the armature plate 121 is only subjected to the pulling force of the reed 122 and is tightened on the back iron 112. At this time, the gap b between the friction plate 350 and the armature plate 121 exists, so that the rotor assembly 100 can rotate smoothly.

[0074] When the stator winding 220 is powered off, the joint module loses power, but due to inertia, the rotor assembly 100 is still rotating. At the same time, the winding 340 is powered off at the same time, and the magnetic field generated by it for offsetting the magnetic field of the permanent magnet 320 disappears. At this time, the permanent magnet 320 forms a magnetic circuit through the bottom plate 310, the side ring 330 and the armature plate 121, adsorbing the armature plate 121 on the surface of the friction plate 350 and maintaining a certain pressure. At this time, the gap b between the friction plate 350 and the armature plate 121 does not exist, and the rotor assembly 100 is braked by dynamic friction force to prevent the rotation of the rotor assembly 100, so as to maintain the spatial position of the robotic arm, and further avoid delivery, so as to return to the non-operating mode of the integrated structure, refer to Figure 16 。

[0075] In summary, the reed 122 is connected between the armature plate 121 and the yoke 112, and the connection point of the reed 122 and the armature plate 121 is offset from the connection point of the reed 122 and the yoke 112, so that the reed 122 can be stretched, and further the armature plate 121 can move when an external force is applied, and then cooperate with the brake stator assembly 300 to realize the braking of the rotor assembly 100, with a compact and novel structure. In addition, the stator assembly 200 and the brake stator assembly 300 are integrated on the shaft portion 111 of the rotor assembly 100, so as to further shorten the axial dimension of the integrated structure to meet the limited installation space of the motor. In addition, the yoke 112 of the rotor assembly 100 mounts the brake armature 120 to cooperate with the brake stator assembly 300 to realize the braking of the rotor assembly 100, further shortening the axial dimension of the integrated structure.

[0076] In addition, those skilled in the art can also change the shapes, structures and materials of the rotor assembly 100, the stator assembly 200 and the brake stator assembly 300 according to the actual situation. As long as they adopt the same or similar technical solutions as those of the present invention on the basis of the above disclosure of the present invention, solve the same or similar technical problems as those of the present invention, and achieve the same or similar technical effects as those of the present invention, they all fall within the protection scope of the present invention. The specific embodiments of the present invention are not limited thereto.

[0077] That is to say, as long as they adopt the same or similar technical solutions as those of the present invention on the basis of the above disclosure of the present invention, solve the same or similar technical problems as those of the present invention, and achieve the same or similar technical effects as those of the present invention, they all fall within the protection scope of the present invention. The specific embodiments of the present invention are not limited thereto.

[0078] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0079] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and without departing from the said principles, any variations or modifications can be made to the embodiments of the present invention.

Claims

1. An integrated structure of an axial magnetic field motor and a permanent magnet brake, characterized in that include: A rotor assembly, comprising a rotor shaft, a brake armature and a plurality of magnetic steels, wherein the rotor shaft comprises a shaft portion and a back iron, wherein the back iron is connected to the shaft portion, wherein the brake armature comprises an armature plate and a spring leaf, wherein both the armature plate and the spring leaf are sleeved on the shaft portion, wherein the spring leaf is connected between the back iron and the armature plate so that the armature plate moves under the action of an external force, wherein the magnetic steel is fixed on the back iron and is located on a side of the back iron away from the brake armature; A stator assembly, comprising a stator core and a stator winding, wherein the stator winding is fixed on the stator core, the stator core is sleeved on the shaft, and a side of the stator core fixing the stator winding is arranged opposite to the magnetic steel; A brake stator assembly is sleeved on the shaft portion and cooperates with the armature plate to brake the rotor assembly; The connection point between the reed and the armature plate is staggered with the connection point between the reed and the back iron.

2. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 1, characterized in that There are multiple connection points between the reed and the armature plate, which are spaced apart along the outer periphery of the reed. There are multiple connection points between the reed and the back iron, which are spaced apart along the outer periphery of the reed. The connection point between the reed and the armature plate is located between two adjacent connection points between the reed and the back iron.

3. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 1, characterized in that, The reed is fixed to the armature plate by a first fastener, and the reed is fixed to the back iron by a second fastener. The first fastener and the second fastener are staggered, and an avoidance hole for avoiding the second fastener is opened on the armature plate.

4. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 1, characterized in that, The brake stator assembly includes a permanent magnet, a winding and a friction plate, wherein the winding is located between the permanent magnet and the friction plate, and when the permanent magnet, the winding and the friction plate are sleeved on the shaft, the friction plate is arranged opposite to the armature plate.

5. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 4, characterized in that, The brake stator assembly also includes a base plate, the permanent magnet, the winding and the friction plate are sleeved on the base plate, and the base plate is sleeved on the shaft.

6. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 5, characterized in that, The bottom plate includes a base and a sleeve portion, the base and the sleeve portion are connected, the permanent magnet, the winding and the friction plate are all sleeved on the sleeve portion, and the permanent magnet is located between the base and the winding.

7. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 6, characterized in that, The brake stator assembly also includes a side ring, which is sleeved outside the sleeve portion and located between the friction plate and the permanent magnet, so that the winding is fixed inside the side ring.

8. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 7, characterized in that, The side ring includes a side ring bottom and a side ring wall portion, the outer wall of the side ring bottom is extended to form the side ring wall portion, the side ring bottom is sleeved on the shaft portion so that the permanent magnet is fixed between the bottom plate and the side ring bottom, the side ring wall portion is located on the side of the side ring bottom away from the permanent magnet, the winding is sleeved between the shaft portion and the side ring wall portion, and the friction plate is sleeved between the shaft portion and the side ring wall portion.

9. The integrated structure of the axial magnetic field motor and the permanent magnet brake according to claim 7, characterized in that The armature plate, the bottom plate and the side ring are made of magnetic conductive material.

Images