CN114635935B - Braking force adjustable long-life electromagnetic power-off brake - Google Patents
Braking force adjustable long-life electromagnetic power-off brake Download PDFInfo
- Publication number
- CN114635935B CN114635935B CN202210330814.6A CN202210330814A CN114635935B CN 114635935 B CN114635935 B CN 114635935B CN 202210330814 A CN202210330814 A CN 202210330814A CN 114635935 B CN114635935 B CN 114635935B
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- brake
- compression spring
- armature
- stator
- flat head
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- 230000006835 compression Effects 0.000 claims abstract description 34
- 238000007906 compression Methods 0.000 claims abstract description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract 4
- 229910052742 iron Inorganic materials 0.000 claims abstract 2
- 239000002245 particle Substances 0.000 claims description 6
- 239000000565 sealant Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/42—Slack adjusters mechanical non-automatic
- F16D65/46—Slack adjusters mechanical non-automatic with screw-thread and nut
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/04—Attachment of linings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/18—Electric or magnetic
- F16D2121/20—Electric or magnetic using electromagnets
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
A braking force adjustable long-service-life electromagnetic power-off brake relates to the technical field of electromagnetic brakes, and can adapt to different braking moment requirements as the same type of brake, so that the brake model selection is effectively reduced, and the cost of arranging a plurality of manufacturing production lines for the brake is reduced. The braking force-adjustable long-service-life electromagnetic power-off brake comprises a stator shell, a compression spring, a stator and an armature, wherein one end of the compression spring is embedded in a spring hole of the stator shell, the other end of the compression spring is contacted with one side of the armature, and a cast aluminum rotor adopts a T-shaped structure; the stator shell is provided with a threaded hole drilled at the bottom of the compression spring, the concave end inner hexagonal flat head screw is embedded in the stator shell through threaded connection, and the flat head position of the concave end inner hexagonal flat head screw is positioned at the compression spring; the other two sides of the two friction plates are respectively contacted with one side of the armature iron and one side of the flange plate, the surface of one side of the flange plate, which is close to the friction plates, is provided with a U-shaped groove, and the other side of the flange plate is provided with an outer spigot.
Description
Technical Field
The invention relates to the technical field of electromagnetic brakes, in particular to a braking force-adjustable long-service-life electromagnetic power-off brake, and especially relates to an electromagnetic brake capable of freely adjusting braking force.
Background
Currently, an electromagnetic power-off brake is the most common type of brake, and is also the most widely used brake, and the application fields of the brake comprise nuclear power, wind power, automobiles, smelting, elevators, lifting, transmission transportation and the like; therefore, the electromagnetic brake has wide market and various types.
However, since the electromagnetic brake is constructed such that the compression spring provides positive pressure to the armature to thereby generate braking effect by friction between the armature and the friction plate, spring force is an extremely important parameter. However, the spring force of the existing electromagnetic power-off brake in the market is mainly adjusted by adding and subtracting the spring, and the brake is required to be disassembled and reassembled in the process.
In other words, the electromagnetic power-off brake in the prior art mainly has the following defects:
(1) The spring force cannot be regulated under the condition that the number of the springs is not increased or reduced, and when the spring force does not meet the requirement, the spring must be replaced when the fatigue strength of the spring is attenuated;
(2) After the friction plate is worn, the braking clearance is adjusted, and the spring force is weakened, so that the length of the spring bottom needs to be adjusted to compensate the maximum or minimum spring force;
(3) Most of cast aluminum rotor structures are L-shaped, have weaker bearing and impact resistance, large volume and weight and need larger installation reserved space;
(4) Most of the electromagnetic brake and the motor rear end cover use a friction plate manufactured by a stamping process, the flatness of the friction plate is difficult to control, and the noise of the brake and the service life of the brake can be directly influenced.
Disclosure of Invention
The invention aims to provide a high-service-life electromagnetic power-off brake with adjustable braking force, which can be used as a same brake to adapt to different braking moment requirements, effectively reduce the type selection of the brake and reduce the cost of arranging a plurality of manufacturing production lines on the brake.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a brake force adjustable high life electromagnetic power loss brake comprising: the stator comprises a stator shell, an armature, a hollow bolt, a friction plate, a cast aluminum rotor, a spline housing, a compression spring, a flange plate and a concave end inner hexagonal flat head screw;
one end of the compression spring is embedded in a spring hole of the stator shell, the other end of the compression spring is in contact with one side of the armature, the hollow bolt penetrates through the armature to be connected with the stator, two friction plates are respectively adhered to two sides of the cast aluminum rotor, the cast aluminum rotor is connected with the spline housing through a spline, the spline housing is mounted on a motor shaft, and meanwhile the cast aluminum rotor adopts a T-shaped structure;
the stator shell is positioned at the bottom of the compression spring and is provided with a threaded hole, the concave end inner hexagonal flat head screw is embedded in the stator shell through threaded connection, and the flat head position of the concave end inner hexagonal flat head screw is positioned at the compression spring so as to adjust the compression amount of the compression spring and achieve the purpose of adjusting the brake moment of a brake by screwing the concave end inner hexagonal flat head screw;
the other two sides of the friction plates are respectively contacted with one side of the armature and one side of the flange plate, the surface, close to the friction plates, of one side of the flange plate is provided with a U-shaped groove, the U-shaped groove is used for containing particles falling off the friction plates through friction, and meanwhile, the other side of the flange plate is provided with an outer spigot, and the outer spigot is used for being in interference fit with an end cover of the motor.
During practical application, braking force adjustable long-life electromagnetism power-off brake still includes: a through-hole plug, a lead-out wire, a pin with a hole, a hexagon head bolt, and a brake handle assembly;
the outgoing line passes through the through-hole stopper connects power supply unit, the hexagon head bolt passes through foraminiferous round pin connection stopper handle subassembly, just the hexagon head bolt passes through the stator casing with armature connection pulls stopper handle subassembly can manual control the actuation and the release of armature.
Specifically, the inside of stator casing is equipped with the coil skeleton, and the coil skeleton winds the electromagnetic wire and annotates the sealant.
Compared with the prior art, the braking force adjustable long-service-life electromagnetic power-off brake has the following advantages:
in the braking force adjustable long-service-life electromagnetic power-off brake, the stator shell is provided with the threaded hole, the threaded hole is internally connected with the concave end inner hexagonal flat head screw, and the top of the concave end inner hexagonal flat head screw is contacted with the bottom of the compression spring, so that the compression amount of the compression spring can be adjusted by screwing the concave end inner hexagonal flat head screw, and the braking torque of the whole electromagnetic brake is controlled; the cast aluminum rotor adopts a T-shaped structure, so that the bearing capacity and the impact resistance of the rotor can be effectively improved; the flange plate is adopted to replace the traditional friction plate, so that the flatness and the surface roughness of the friction plate can be better controlled, the friction effect between the friction plate and the mating part is better, and the U-shaped groove is additionally arranged on the surface of the flange plate, so that particles generated by friction between the friction plate and the friction plate can be contained, the noise of the brake is reduced to a greater extent, and the service life of the brake is prolonged; in addition, the flange plate is additionally provided with the outer spigot, so that the matching degree of the brake and the rear end cover of the motor is better.
Drawings
FIG. 1 is a schematic cross-sectional view of a brake with adjustable braking force and a long service life electromagnetic power-off brake according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a structure of a brake with adjustable braking force and long service life electromagnetic power-off according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the structure of a cast aluminum rotor in a brake with adjustable braking force and long service life electromagnetic power loss according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a first view angle structure of a flange plate in a brake with adjustable braking force and long service life of an electromagnetic power-off brake according to an embodiment of the invention;
fig. 5 is a schematic diagram of a second view angle structure of a flange plate in the braking force adjustable long-life electromagnetic power-off brake according to the embodiment of the invention.
Reference numerals:
1-a stator housing; 2-armature; 3-hollow bolts; 5-friction plate; 6-cast aluminum rotor; 7-spline housing; 8-coil frameworks; 9-electromagnetic wires; 10-sealing glue; 11-compressing a spring; 12-a flange plate; 121-U-shaped groove; 122-outer spigot; 14-a female end internal hexagonal flat head screw; 16-a through hole plug; 17-outgoing lines; 18-a pin with holes; 19-hex head bolts; 20-brake handle assembly.
Detailed Description
In order to facilitate understanding, the embodiment of the invention provides a braking force adjustable high-service-life electromagnetic power-off brake which is described in detail below with reference to the attached drawings.
The embodiment of the invention provides a braking force adjustable long-service-life electromagnetic power-off brake, as shown in figures 1-5, comprising: the stator comprises a stator shell 1, an armature 2, a hollow bolt 3, a friction plate 5, a cast aluminum rotor 6, a spline housing 7, a compression spring 11, a flange plate 12 and a concave end inner hexagonal flat head screw 14;
one end of a compression spring 11 is embedded in a spring hole of the stator shell 1, the other end of the compression spring 11 is in contact with one side of the armature 2, a hollow bolt 3 penetrates through the armature 2 to be connected with a stator, two friction plates 5 are respectively adhered to two sides of the cast aluminum rotor 6, the cast aluminum rotor 6 is connected with a spline sleeve 7 through a spline, the spline sleeve 7 is installed on a motor shaft, and meanwhile, the cast aluminum rotor 6 adopts a T-shaped structure;
the stator shell 1 is provided with a threaded hole drilled at the bottom of the compression spring 11, the concave end inner hexagonal flat head screw 14 is embedded in the stator shell 1 through threaded connection, and the flat head position of the concave end inner hexagonal flat head screw 14 is positioned at the compression spring 11, so that the compression amount of the compression spring 11 can be adjusted by screwing the concave end inner hexagonal flat head screw 14, and the brake moment of a brake can be adjusted;
the other two sides of the two friction plates 5 are respectively contacted with one side of the armature 2 and one side of the flange plate 12, and the surface of one side of the flange plate 12, which is close to the friction plates 5, is provided with a U-shaped groove 121, the U-shaped groove 121 can be used for accommodating particles falling off the friction plates through friction, and meanwhile, the other side of the flange plate 12 is provided with an outer spigot 122, and the outer spigot 122 can be used for being in interference fit with a motor end cover.
Compared with the prior art, the braking force adjustable long-service-life electromagnetic power-off brake provided by the embodiment of the invention has the following advantages:
in the braking force-adjustable long-service-life electromagnetic power-off brake provided by the embodiment of the invention, the stator shell 1 is provided with the threaded hole, the threaded hole is internally connected with the concave end inner hexagonal flat head screw 14, and the top of the concave end inner hexagonal flat head screw 14 is contacted with the bottom of the compression spring 11, so that the compression amount of the compression spring 11 can be adjusted by screwing the concave end inner hexagonal flat head screw 14, and the braking torque of the whole electromagnetic brake is further controlled; the cast aluminum rotor 6 adopts a T-shaped structure, so that the bearing capacity and the impact resistance of the rotor can be effectively improved; the flange 12 is adopted to replace the traditional friction plate, so that the flatness and the surface roughness of the friction plate can be better controlled, the friction effect between the friction plate 5 and the mating part is better, and the U-shaped groove 121 is additionally arranged on the surface of the flange 12, so that particles generated by friction between the friction plate and the friction plate 5 can be contained, the noise of the brake is reduced to a greater extent, and the service life of the brake is prolonged; in addition, the flange plate 12 is additionally provided with the outer spigot 122, so that the matching degree of the brake and the motor rear end cover is better.
In practical application, as shown in fig. 1 and fig. 2, the electromagnetic power-off brake with adjustable braking force and long service life provided by the embodiment of the invention may further include: a through hole plug 16, a lead-out wire 17, a pin with hole 18, a hex head bolt 19, and a brake handle assembly 20;
the lead-out wire 17 can be connected with a power supply assembly through the through hole plug 16, the hexagon head bolt 19 can be connected with the brake handle assembly 20 through the pin 18 with holes, the hexagon head bolt 19 can be connected with the armature 2 through the stator shell 1, and the brake handle assembly 20 is pulled to manually control the actuation and release of the armature 2.
Specifically, as shown in fig. 1, the inside of the stator housing 1 may be fitted with a bobbin 8, and the bobbin 8 is wound with electromagnetic wires 9 and injected with sealant 10.
In summary, the braking force adjustable long-service-life electromagnetic power-off brake provided by the embodiment of the invention mainly has the following advantages:
1. screw holes are drilled at the end part of the brake stator where the spring base is positioned, and the compression amount of the spring is adjusted by using screws, so that the purpose of adjusting the spring force of the brake is achieved;
2. the free length of the spring is adjusted by using a hexagonal flat head screw in the concave end on the premise of not changing the axial and radial dimensions of the brake; the concave end inner hexagonal flat head screw has small and exquisite appearance, low price and high strength, can be quantitatively adjusted according to the use requirement at will, and effectively solves the problems of high price, inaccurate braking force adjustment, large axial dimension and the like of the traditional braking force adjustable brake;
3. the T-shaped cast aluminum rotor structure is adopted, so that the T-shaped cast aluminum rotor has better bearing capacity and impact resistance, and can meet more complex operation conditions;
4. the gap between the rear end cover and the rear end cover is changed into a flange plate from a traditional friction plate, and the surface of the flange plate is provided with a groove for containing particles falling off from the friction material; the flange plate and the motor rear end cover are provided with outer rabbets, so that the mounting and matching precision of the brake and the motor can be improved, the running noise of the brake is reduced, and the service life of the brake is prolonged.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A brake force adjustable high life electromagnetic power loss brake comprising: the stator comprises a stator shell, an armature, a hollow bolt, a friction plate, a cast aluminum rotor, a spline housing, a compression spring, a flange plate and a concave end inner hexagonal flat head screw;
one end of the compression spring is embedded in a spring hole of the stator shell, the other end of the compression spring is in contact with one side of the armature, the hollow bolt penetrates through the armature to be connected with the stator, two friction plates are respectively adhered to two sides of the cast aluminum rotor, the cast aluminum rotor is connected with the spline housing through a spline, the spline housing is mounted on a motor shaft, and meanwhile the cast aluminum rotor adopts a T-shaped structure;
the stator shell is positioned at the bottom of the compression spring and is provided with a threaded hole, the concave end inner hexagonal flat head screw is embedded in the stator shell through threaded connection, and the flat head position of the concave end inner hexagonal flat head screw is positioned at the compression spring so as to adjust the compression amount of the compression spring and achieve the purpose of adjusting the brake moment of a brake by screwing the concave end inner hexagonal flat head screw;
the other two sides of the two friction plates are respectively contacted with one side of the armature iron and one side of the flange plate, a U-shaped groove is formed in the surface of one side, close to the friction plates, of the flange plate, the U-shaped groove is used for containing particles falling off the friction plates through friction, and meanwhile, an outer spigot is arranged on the other side of the flange plate and is in interference fit with an end cover of the motor;
the braking force adjustable long-life electromagnetic power-off brake further comprises: a through-hole plug, a lead-out wire, a pin with a hole, a hexagon head bolt, and a brake handle assembly; the outgoing line passes through the through-hole stopper connects power supply unit, the hexagon head bolt passes through foraminiferous round pin connection stopper handle subassembly, just the hexagon head bolt passes through the stator casing with armature connection pulls stopper handle subassembly can manual control the actuation and the release of armature.
2. The brake force adjustable high life electromagnetic power loss brake of claim 1, wherein a coil former is assembled inside the stator housing, and wherein the coil former is wound with electromagnetic wire and injected with sealant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330814.6A CN114635935B (en) | 2022-03-31 | 2022-03-31 | Braking force adjustable long-life electromagnetic power-off brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210330814.6A CN114635935B (en) | 2022-03-31 | 2022-03-31 | Braking force adjustable long-life electromagnetic power-off brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114635935A CN114635935A (en) | 2022-06-17 |
| CN114635935B true CN114635935B (en) | 2024-01-26 |
Family
ID=81950762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210330814.6A Active CN114635935B (en) | 2022-03-31 | 2022-03-31 | Braking force adjustable long-life electromagnetic power-off brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114635935B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB456678A (en) * | 1935-07-06 | 1936-11-13 | Scott L & Electromotors Ltd | Improvements in electromagnetic brakes |
| GB1198952A (en) * | 1967-07-21 | 1970-07-15 | Bbc Brown Boveri & Cie | Improvements in or relating to Electromagnetic Brakes |
| CN2378572Y (en) * | 1999-05-13 | 2000-05-17 | 中国长江航运集团电机厂 | Friction dry type electricity loss electromagnetic braker |
| JP2001140957A (en) * | 1999-11-11 | 2001-05-22 | Hosei Brake Ind Ltd | Motor-driven brake |
| CN101029665A (en) * | 2006-03-03 | 2007-09-05 | 康卓彬德电磁技术有限公司 | Electromagnetic opening spring pressure brake with loosening device and minitype switch |
| CN101934995A (en) * | 2010-08-16 | 2011-01-05 | 成都瑞迪机械实业有限公司 | Multiple-magnetic pole double-loop disc brake |
| CN102767582A (en) * | 2012-07-05 | 2012-11-07 | 成都瑞迪机械实业有限公司 | Manual release type high torque electromagnetic brake |
| CN204810050U (en) * | 2015-06-05 | 2015-11-25 | 启东大同电机有限公司 | Novel stopper of construction elevator motor |
| CN105899835A (en) * | 2013-10-01 | 2016-08-24 | 肯德隆（菲林根）有限公司 | Electromagnetically actuatable spring pressure brake and method for the production thereof |
| CN206000900U (en) * | 2016-08-25 | 2017-03-08 | 沈阳露天采矿设备制造有限公司 | New type mining excavator disk brake |
| CN107605994A (en) * | 2017-08-22 | 2018-01-19 | 湖北航天技术研究院特种车辆技术中心 | A kind of dry type EPB |
| CN108799371A (en) * | 2018-08-09 | 2018-11-13 | 安徽立信电磁离合器有限公司 | A kind of external rotor electric machine electromagnetic brake |
-
2022
- 2022-03-31 CN CN202210330814.6A patent/CN114635935B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB456678A (en) * | 1935-07-06 | 1936-11-13 | Scott L & Electromotors Ltd | Improvements in electromagnetic brakes |
| GB1198952A (en) * | 1967-07-21 | 1970-07-15 | Bbc Brown Boveri & Cie | Improvements in or relating to Electromagnetic Brakes |
| CN2378572Y (en) * | 1999-05-13 | 2000-05-17 | 中国长江航运集团电机厂 | Friction dry type electricity loss electromagnetic braker |
| JP2001140957A (en) * | 1999-11-11 | 2001-05-22 | Hosei Brake Ind Ltd | Motor-driven brake |
| CN101029665A (en) * | 2006-03-03 | 2007-09-05 | 康卓彬德电磁技术有限公司 | Electromagnetic opening spring pressure brake with loosening device and minitype switch |
| CN101934995A (en) * | 2010-08-16 | 2011-01-05 | 成都瑞迪机械实业有限公司 | Multiple-magnetic pole double-loop disc brake |
| CN102767582A (en) * | 2012-07-05 | 2012-11-07 | 成都瑞迪机械实业有限公司 | Manual release type high torque electromagnetic brake |
| CN105899835A (en) * | 2013-10-01 | 2016-08-24 | 肯德隆（菲林根）有限公司 | Electromagnetically actuatable spring pressure brake and method for the production thereof |
| CN204810050U (en) * | 2015-06-05 | 2015-11-25 | 启东大同电机有限公司 | Novel stopper of construction elevator motor |
| CN206000900U (en) * | 2016-08-25 | 2017-03-08 | 沈阳露天采矿设备制造有限公司 | New type mining excavator disk brake |
| CN107605994A (en) * | 2017-08-22 | 2018-01-19 | 湖北航天技术研究院特种车辆技术中心 | A kind of dry type EPB |
| CN108799371A (en) * | 2018-08-09 | 2018-11-13 | 安徽立信电磁离合器有限公司 | A kind of external rotor electric machine electromagnetic brake |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114635935A (en) | 2022-06-17 |
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