Motor rear cover module, brake and motor

Abstract

The invention discloses a motor rear cover module, a brake and a motor. The motor rear cover module comprises a motor rear cover, a bottom plate and equal-height columns, and the bottom plate is installed or arranged on the motor rear cover; the equal-height columns are installed on the bottom plate or the motor rear cover, or the equal-height columns are arranged on the bottom plate or the motor rear cover. The brake and the motor rear cover module are simple and compact in structure, and braking can be relieved through small current by controlling the machining precision and the assembling precision of all parts. The motor rear cover module can be integrated, an equal-height column of a brake is omitted, and a boss (equal-height column in the second embodiment) is cast on the motor rear cover to replace the equal-height column of the brake. Meanwhile, a bottom plate which is used for being installed on the motor rear cover and rubs with a brake disc is replaced by a steel part, and the steel part is arranged in the motor rear cover in a casting or die-casting mode, so that the steel part (equivalent to an original bottom plate) and the motor rear cover are combined into a whole. Therefore, the overall weight and the size are obviously reduced, and great advantages are achieved in the aspects of storage and logistics.

Description

Technical Field

[0001] The invention relates to motor technology, and in particular to a motor back cover module, a brake and a motor. Background Art

[0002] In motors with braking functions, a separate brake is generally used to brake the output shaft, and the output shaft needs to brake when it outputs power to the outside. This type of motor is widely used in products such as scooters and wheelchairs. Most of its structures use springs to provide braking force, and then use coils to generate electromagnetic force to release the brake. However, this type of product is powered by batteries and generally driven by 24V DC, which means that when driving the output shaft to rotate, a part of the current needs to be divided to the coil. Since this type of motor is relatively small in size, the diameter is generally not more than 6cm and the thickness is generally not more than 5cm, so the maximum torque output by the motor is limited, and the current of the motor directly affects its output torque, so in theory, the smaller the current required by the coil, the better. At the same time, in order to ensure the braking effect, the spring needs to provide sufficient braking force. At this time, a compromise choice needs to be made, that is, to use as small a current as possible to release the brake under the premise of ensuring sufficient braking force.

[0003] However, there is no better solution at present. The torque that can be output by motors of similar size and weight is not ideal, and the current required to release the brake is still relatively large. In addition, brakes with the same performance are relatively large in size and weight, and it is difficult to further reduce their weight and miniaturization. This has become a technical problem that needs to be solved at present. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a motor back cover module, a brake, and a motor, wherein the motor back cover module is installed on the brake to cooperate with the brake disc of the brake for braking; the brake is light in weight and small in size.

[0005] To achieve the above-mentioned purpose, the present invention provides a motor back cover module, including a motor back cover, a base plate, and equal height columns, wherein the base plate is installed or arranged on the motor back cover; the equal height columns are installed on the base plate or the motor back cover, or the equal height columns are arranged on the base plate or the motor back cover.

[0006] As a further improvement of the present invention, the bottom plate is a steel piece, and the steel piece is arranged or installed on the rear cover of the motor.

[0007] As a further improvement of the present invention, the motor rear cover is integrally formed by casting or die-casting, and the equal height columns are integrally cast or die-cast with the motor rear cover; the steel part is put into a mold and integrally cast or die-cast with the motor rear cover.

[0008] As a further improvement of the present invention, a module groove is provided on the motor rear cover module, and the steel part is fixed in the module groove.

[0009] As a further improvement of the present invention, steel protrusions are respectively provided on the inner and outer sides of the steel part, and the steel protrusions are embedded in the motor rear cover module to achieve the steel part and the motor rear cover module being fixed as a whole.

[0010] As a further improvement of the present invention, the equi-height column is provided with an equi-height column end face and an equi-height column side face, the equi-height column end face is tightly attached to the end face of the brake shell of the brake, and the equi-height column side face is attached to the outer wall of the brake shell.

[0011] The present invention also discloses a brake, comprising a brake housing, a coil sleeve, an armature disc, an armature, a brake disc, and the above-mentioned motor rear cover module, wherein the coil sleeve is installed in the brake housing, and a coil is wound on the coil sleeve, and a magnetic field is generated when the coil is energized; An armature is installed inside the coil sleeve, one end of the armature passes through the coil sleeve and is assembled and fixed with the armature disk, and the other end of the armature passes through the brake housing, and a spring is sleeved on the part of the armature located between the inner wall of the brake housing and the armature disk; A brake disc is installed between the bottom plate or steel part of the motor rear cover module and the armature plate. The brake disc is directly or indirectly assembled with the output shaft of the motor, and the brake disc can directly or indirectly provide braking force to the output shaft.

[0012] As a further improvement of the present invention, an armature disc groove is provided on the armature disc, and the armature disc groove is engaged with and slidably assembled with the equal-height columns of the motor rear cover module.

[0013] As a further improvement of the present invention, a brake disc hole is provided on the brake disc, and the brake disc hole is assembled with a transmission block, and the transmission block is installed and fixed or arranged on the output shaft of the motor.

[0014] As a further improvement of the present invention, it also includes a handle, wherein a ball and a limit pin are installed and fixed on the brake shell, and one end of the armature passes through the brake shell and is assembled with the handle; a limit groove and a positioning hole are provided on the handle, and the limit pin passes through the limit groove; the positioning hole can be assembled with the ball.

[0015] The invention also discloses a motor, which comprises the motor rear cover module or the brake.

[0016] The beneficial effects of the present invention are: The brake and motor rear cover module of the present invention has a simple and compact structure. By controlling the processing accuracy and assembly accuracy of each component, a smaller current can be used to release the brake to ensure that the motor obtains sufficient current supply, thereby ensuring that the motor has a larger output torque.

[0017] The invention discloses a motor rear cover module, a brake, and a motor. The motor rear cover module comprises a motor rear cover, a bottom plate, and equal height columns. The bottom plate is installed or arranged on the motor rear cover; the equal height columns are installed on the bottom plate or the motor rear cover, or the equal height columns are arranged on the bottom plate or the motor rear cover. The brake and motor rear cover module of the invention have a simple and compact structure. By controlling the processing accuracy and assembly accuracy of each component, the brake can be released with a relatively small current.

[0018] The present invention can integrate the motor back cover module into one, cancel the equal height column of the brake, and cast a boss (the equal height column of the second embodiment) on the motor back cover to replace the equal height column of the brake. At the same time, the bottom plate used for installation with the motor back cover and friction with the brake disc is replaced with a steel part, and the steel part is cast or die-cast in the motor back cover, so that the steel part (equivalent to the original bottom plate) and the motor back cover are combined into one. This makes the overall weight and volume significantly smaller, which has great advantages in warehousing and logistics. This design makes the overall weight and volume significantly smaller, which has great advantages in warehousing and logistics. At the same time, after testing, there is no obvious difference in the performance of the motor, which makes it possible to reduce the material consumption, reduce the difficulty of processing and assembly, improve production efficiency, reduce the defective rate, and improve the logistics advantage while ensuring the same performance of the brake and the motor and improving the overall integration. It is the first in the industry, creating a new technical route, and has a very high market promotion value.

[0019] In wheelchairs, power-assisted bicycles and other equipment, weight and volume have a great impact on their product competitiveness. The creative approach of integrating the motor back cover module just meets the market requirements for lightweight and miniaturization, making the product extremely competitive in the market, with great market promotion and application prospects and great economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1-Figure 2 It is a schematic diagram of the structure of the brake in the first embodiment.

[0021] Figure 3-Figure 4 This is an exploded view of the brake parts; Figure 5 is a cross-sectional view of the brake located at the center plane where the axis of the armature 140 is located; Figure 6 This is a cross-sectional view of the brake at the center plane where the axis of the limit pin 111 is located Figure 7 is a schematic diagram of the structure in which the brake is installed on the motor 240 in the first embodiment; Figure 8-Figure 9 It is a schematic diagram of the assembly structure of the brake and the motor rear cover in the first embodiment; Figure 10-12 It is a schematic diagram of the structure of the brake in the second embodiment.

[0022] Fig.13 is a cross-sectional view of the brake in the second embodiment located at the center plane where the axis of the armature 140 is located; Fig.14 is a cross-sectional view of the brake in the second embodiment located at another center plane where the axis of the armature 140 is located; Figure 15-16 is a schematic diagram of the structure of the brake in the second embodiment; Figure 17-Figure 18 is an exploded view of the parts of the brake in the second embodiment; Figure 19-20 is a structural schematic diagram of the motor rear cover module 300 in the second embodiment; Fig.21 is a cross-sectional view of the motor in the second embodiment located at the center plane where the axis of the output shaft 560 is located; Fig. 22 is a cross-sectional view of the motor in the second embodiment located at another center plane where the axis of the output shaft 560 is located; Figure 23-Figure 26 is a partial structural schematic diagram of the motor in the second embodiment; Fig. 27 It is a weighing photo of the brake and the motor rear cover in the first embodiment; Fig.28 is a weighing photograph of the brake in Example 1; Fig.29 is a weighing photograph of the brake in Example 2; Fig.30 This is a photo of the thickness measurement of the brake housing 110 in the first embodiment; Fig.31 This is a photo of the thickness measurement of the brake housing 110 in the second embodiment; Fig.32 This is a photograph of the diameter measurement of the brake housing 110 in the first embodiment; Fig.33 This is a photograph of the diameter measurement of the brake housing 110 in the second embodiment. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Embodiment 1

[0024] See also Figure 1-Figure 9The motor 240 of this embodiment includes a brake and a motor back cover 241. The brake includes a brake housing 110, a coil sleeve 120, an armature disc 130, an armature 140, a brake disc 150, a base plate 160, and a handle 190. A ball 112 is spherically and rollingly mounted on the brake housing 110, a limit pin 111 is fixedly mounted, and a mounting sleeve 113 is provided. The coil sleeve 120 is sleeved outside the mounting sleeve 113, and a coil 220 is wound around the coil sleeve 120. The coil 220 generates a magnetic field when energized.

[0025] An armature 140 is axially slidably installed in the mounting sleeve 113. One end of the armature 140 passes through the mounting sleeve 113 and is assembled and fixed to the armature plate 130, and the other end passes through the brake housing 110 and the handle 190 and is tightly attached to the gasket 141. The handle bolt 142 passes through the gasket 141 and is assembled with the armature 140, so that the handle 190 and the armature 140 cannot be assembled relative to each other in the axial direction.

[0026] A spring 230 is mounted on the portion of the armature 140 between the inner wall of the brake housing 110 and the armature plate 130 . The spring 230 applies a thrust to the armature plate 130 away from the mounting sleeve 113 .

[0027] The bottom plate 160 is assembled with one end of the height column 170. Specifically, the column bolt 180 passes through the bottom plate 160 and is assembled and fixed with the height column 170. The end surface of the height column 170 is tightly attached to the end surface of the brake housing 110. The height column 170 is engaged with the armature disc groove 131 and slidably assembled. The armature disc groove 131 is set on the armature disc 130.

[0028] A brake disc 150 is installed between the bottom plate 160 and the armature plate 130. The brake disc 150 is provided with a brake disc hole 151. The brake disc hole 151 is connected to the transmission block 410 (combined with Fig.11 ) is engaged, axially slidable and non-rotatable relative to the circumference, and the transmission block 410 is installed and fixed on the output shaft of the motor 240.

[0029] The bottom plate 160 is provided with a bottom plate groove 161 , which is used to facilitate screws to pass through and be assembled and fixed to the motor rear cover 241 .

[0030] In the initial state, the coil is not energized, and the spring 230 pushes the armature plate 130 toward the brake disc 150 through its own elastic force, thereby pressing the brake disc 150 against the bottom plate 160. At this time, due to the effect of friction, the brake disc 150 cannot rotate to achieve braking.

[0031] When the motor starts, the coil is energized to generate a magnetic field, which drives the armature 140 and the armature disc 130 to move away from the brake disc 150, thereby releasing the pressure on the brake disc 150, that is, releasing the brake. At this time, the motor can drive its output shaft to rotate.

[0032] Preferably, a micro switch 210 is also mounted on the brake housing 110, and a trigger end 211 is provided on the micro switch 210. In the initial state, the trigger end is located in the switch slot 193, so as not to touch the trigger end 211. The two sides of the switch slot 193 are trigger slopes 194, and the switch slot 193 and the trigger slope 194 are both provided on the handle 190.

[0033] The handle 190 is also provided with a limit slot 191 and a positioning hole 192, and the limit pin 111 passes through the limit slot 191, thereby limiting the maximum rotation angle of the handle. In the initial state, one end of the ball 112 is inserted into the positioning hole 192 so that the ball 112 does not produce an extrusion in the thickness direction of the handle (the direction of the armature axis), thereby maintaining the handle in the initial state without generating an axial pulling force on the armature 140, and at this time it is in an electric state. When it is necessary to switch to the manual state, the handle is turned, and the handle squeezes the ball 112 so that it moves above the ball under the action of the ball until the limit pin is in close contact with one end of the limit slot 191. In this process, the ball guides the handle to move away from the brake disc in the armature diameter direction, so as to drive the armature disc 130 to move away from the brake disc synchronously, thereby releasing the braking state, and at this time the output shaft of the motor can rotate, thereby triggering the inclined surface 194 to touch the trigger end 211, and the micro switch 210 is triggered to send a signal to the external control device, and the external control device controls the motor to cut off the power to enter the manual state. The external control device is used to send and receive analytical control instructions and perform parameter calculations and program operation, and can be selected from an industrial computer, MCU, CPU, or PLC. To control the motor to cut off power, a relay can be connected in series to the motor's power supply line, and the control end of the relay is connected to the external control device, so that the external control device can be used to control the relay to cut off.

[0034] See also Figure 7-Figure 9Preferably, in order to minimize the current required by the coil while ensuring the braking effect, in this embodiment, after the equal-height columns 170 are installed on the base plate through the column bolts 180, the horizontal error of the end faces of the three equal-height columns 170 is controlled within 1 wire (the length error of the three equal-height columns is 1 wire), and at the same time, it is necessary to control the assembly tolerances of the brake housing 110 and the end faces of the equal-height columns 170, the linear tolerances and form and position tolerances of the brake disc 150 and the armature plate 130, the base plate 160 (motor back cover), the outer wall of the equal-height columns 170 and the armature disc groove 131, and the transmission block and the brake disc hole 151 to be controlled within 1 wire, that is, 0.01㎜. In this way, the armature plate 130 and the brake disc 150 can be as horizontally opposite and close to each other as possible, and the movement resistance of the armature plate is small, so that the displacement of the armature plate 130 when moving away from the brake disc 150 can be controlled within 0.08-0.1 mm. When releasing the brake, it is only necessary to pull the armature plate 130 away from the brake disc 150 slightly. The required current is small, so the current that the motor can obtain is large, and the output torque is also large.

[0035] In this embodiment, the motor rear cover 241 , the bottom plate 160 , and the equal height columns 170 together constitute a motor rear cover module. Embodiment 2

[0036] In the first embodiment, the processing accuracy of 1 thread is very high, and the motor rear cover module is assembled by processing the motor rear cover 241, the bottom plate 160, and the equal height column 170 separately. Therefore, it is very difficult to achieve the end surface horizontal error of the three equal height columns 170, the processing accuracy between the side of the equal height column and the armature disc groove 131, the brake disc and the bottom plate, and the matching tolerance within 1 thread, because these parts have processing errors and assembly errors after assembly. This process will undoubtedly greatly increase the processing volume, reduce production efficiency, and increase the defective rate.

[0037] In this embodiment, the motor rear cover module composed of the motor rear cover 241, the bottom plate 160, and the equal height column 170 is integrated into one part. In this way, during processing, this part only needs to control the processing accuracy of the equal height column 170 and the steel part 330, thereby greatly reducing the manufacturing difficulty, and the production efficiency is higher and the defective rate is lower. At the same time, after actual measurement, the weight of the motor rear cover module in the first embodiment is 550 grams. Fig. 27 Even without the motor rear cover, the overall weight of the brake in the first embodiment is 437 grams (see Fig.28 ); and the weight of the motor rear cover module of this embodiment is 298 grams (see Fig.29 ), which is obviously much lighter than the first embodiment, which is the excellent effect brought by integrating the motor rear cover module into one. At the same time, the volume of this embodiment is also obviously smaller than that of the first embodiment, see Figure 30-Figure 33. The thickness of the integrated motor back cover module 300 in this embodiment can be adjusted as needed, so the volume can be significantly smaller than the brake in Example 1. This makes the overall weight and volume of this embodiment significantly smaller than the brake in Example 1, which has great advantages in warehousing and logistics. At the same time, after testing, the motor performance of this embodiment is not significantly different from that of Example 1, which makes it possible for this embodiment to reduce materials, reduce processing and assembly difficulties, improve production efficiency, reduce defective rates, and improve logistics advantages while ensuring the same performance of the brake and the motor and improving the overall integration. This is an industry first, creating a new technical route, and has extremely high market promotion value. Because in equipment such as wheelchairs and power-assisted bicycles, weight and volume have a great impact on their product competitiveness, this embodiment meets the market requirements for lightweight and miniaturization through improvements to Example 1, making the product of this embodiment extremely competitive in the market, with great market promotion and application prospects and great economic value.

[0038] See also Figure 10-Figure 20 The difference between this embodiment and the first embodiment is that the motor rear cover module 300 is different, the gasket 141 is not used, and the handle bolt 142 passes through the handle 190 and is assembled with the armature 140, so that the handle 190 cannot move axially relative to the armature 140.

[0039] The motor rear cover module 300 is provided with a module groove 301, a through groove 302, a notch groove 303, and a contour column 310. The contour column 310 is provided with a contour column end face 311 and a contour column side face 312. The contour column end face 311 is tightly attached to the end face of the brake shell 110, and the contour column side face 312 is attached to the outer wall of the brake shell 110, so that the contour column has the function of positioning the outer wall of the brake shell 110 in addition to the function in Example 1.

[0040] The notch 303 is used to install the wire sleeve 320. Specifically, the side wall of the wire sleeve 320 is provided with a wire sleeve groove 321, and the wire sleeve groove 321 is clamped at the edge of the notch 303 to achieve assembly. When in use, the wire sleeve is used to lead out the wire.

[0041] The through groove 302 is used to facilitate the placement of the steel part 330 during die-casting or casting. That is, a support platform for placing the steel part 330 is set in the mold, and the steel part 330 is placed on the support platform for die-casting or casting. After completion, the through groove 302 is formed.

[0042] A steel piece 330 is fixed in the module groove 301. The inner and outer sides of the steel piece 330 are respectively provided with a steel piece protrusion 331 and a steel piece groove 332. The steel piece protrusion 331 is embedded in 300 by die-casting extrusion to achieve the fixation and anti-rotation of the steel piece 330 and the motor rear cover module 300. When braking, the armature disc 130 presses the brake disc 150 against the end surface of the steel piece 330.

[0043] In this embodiment, the motor back cover module 300 is generally made of aluminum alloy, and the steel part is made of steel. The steel part 330 is processed with a steel part protrusion 331 and a steel part groove 332 in advance, and then the steel part 330 is placed in a mold and integrally cast or die-cast to form the motor back cover module 300 (including the steel part 330) through a casting process. At this time, the steel part protrusion 331 is embedded in the motor back cover module 300 to play a role of fixing and stopping rotation. This design is mainly because the brake disc 150 needs to be pressed and braked with the motor back cover module 300 during use. There is friction in this process, and the aluminum alloy is relatively soft and consumes too quickly. Therefore, the die-cast steel part 330 is in the motor back cover module 300, so as to use the steel part 330 and the brake disc 150 to press and brake, and use the high strength and wear resistance of steel to extend the life and provide braking force.

[0044] Of course, brake disc grooves 152 may also be provided on the two end faces of the brake disc 150, respectively. On the one hand, the brake disc grooves 152 are used to reduce the contact area between the brake disc 150 and the armature disc 130 and the steel part 330, thereby reducing the processing difficulty while ensuring the braking performance, because only the processing and matching accuracy of the contact part need to be ensured; on the other hand, this design is also conducive to introducing airflow into the brake disc 150, thereby accelerating the heat dissipation of the brake disc 150.

[0045] Preferably, the connecting bolt 420 passes through the brake housing 110 and is assembled and fixed with the equal height column 310 , so that the brake housing is assembled and fixed with the motor rear cover module 300 .

[0046] See also Figure 10-Figure 26 The brake disc hole 151 is engaged with the transmission block 410, can slide axially and cannot rotate relative to the circumference. The transmission block 410 is fixed on the output shaft 560 or is arranged on the output shaft 560. The output shaft 560 passes through the motor 250 and is assembled with the helical gear 510 or the helical gear 510 is arranged on the output shaft 560. The helical gear 510 is meshed with the large gear 520 for transmission. A second bevel gear 532 is rotatably installed on the inner side of the large gear 520. The second bevel gear 532 is respectively meshed with the two first bevel gears 531 for transmission. The two first bevel gears 531 are respectively assembled and fixed with the first wheel shaft 540 and the second wheel shaft 550. The first wheel shaft 540, the second wheel shaft 550 and the motor 250 are all installed in the housing 571. The brake is installed in the outer cover 572, and the outer cover 572 is fixed on the housing 571.

[0047] The handle passes through the outer cover 572 and is fixedly assembled with the sealing block 580. The sealing block 580 is attached to the outside of the outer cover 572 to close the outer cover groove provided on the outer cover 572 for rotating the handle 190 to prevent foreign matter from entering the outer cover 572 and causing contamination.

[0048] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which this application belongs.

[0049] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A motor rear cover module, characterized in that: It includes a motor rear cover, a bottom plate, and equal-height columns. The bottom plate is installed or arranged on the motor rear cover; the equal-height columns are installed on the bottom plate or the motor rear cover, or the equal-height columns are arranged on the bottom plate or the motor rear cover.

2. The motor rear cover module according to claim 1, characterized in that: The bottom plate is a steel part, and the steel part is arranged or installed on the rear cover of the motor.

3. The motor rear cover module according to claim 2, characterized in that: The motor rear cover is integrally formed by casting or die-casting, and the equal height column is integrally cast or die-casted with the motor rear cover; the steel part is put into a mold and integrally cast or die-casted with the motor rear cover.

4. The motor rear cover module according to claim 2 or 3, characterized in that: The motor rear cover module is provided with a module groove, and the steel piece is fixed in the module groove.

5. The motor rear cover module according to any one of claims 2 to 4, characterized in that: The inner and outer sides of the steel part are respectively provided with steel part protrusions, and the steel part protrusions are embedded in the motor rear cover module to realize that the steel part and the motor rear cover module are fixed as a whole.

6. The motor rear cover module according to any one of claims 2 to 4, characterized in that: The equi-height column is provided with an equi-height column end face and an equi-height column side face. The equi-height column end face is tightly attached to the end face of the brake shell of the brake, and the equi-height column side face is attached to the outer wall of the brake shell.

7. A brake, characterized in that: It comprises a brake housing, a coil sleeve, an armature disc, an armature, a brake disc, and a motor rear cover module as claimed in any one of claims 1 to 6, wherein the coil sleeve is installed in the brake housing and a coil is wound around the coil sleeve; An armature is installed inside the coil sleeve, one end of the armature passes through the coil sleeve and is assembled and fixed with the armature disk, and the other end of the armature passes through the brake housing, and a spring is sleeved on the part of the armature located between the inner wall of the brake housing and the armature disk; A brake disc is installed between the bottom plate or steel part of the motor rear cover module and the armature plate. The brake disc is directly or indirectly assembled with the output shaft of the motor, and the brake disc can directly or indirectly provide braking force to the output shaft.

8. The brake according to claim 7, characterized in that: The armature disc is provided with an armature disc groove, which is engaged with the equal height column of the motor rear cover module and slidably assembled.

9. The brake according to claim 7 or 8, characterized in that: The brake disc is provided with a brake disc hole, the brake disc hole is assembled with a transmission block, and the transmission block is fixedly installed or arranged on the output shaft of the motor.

10. The brake according to claim 9, characterized in that: It also includes a handle, wherein a ball and a limit pin are installed and fixed on the brake shell, and one end of the armature passes through the brake shell and is assembled with the handle; a limit groove and a positioning hole are arranged on the handle, the limit pin passes through the limit groove, and the positioning hole can be assembled with the ball.

11. A motor, characterized in that: It comprises the motor back cover module according to any one of claims 1 to 6 or the brake according to any one of claims 7 to 10.

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