CN113949206A - Motor and magnetic brake - Google Patents
Motor and magnetic brake Download PDFInfo
- Publication number
- CN113949206A CN113949206A CN202010689385.2A CN202010689385A CN113949206A CN 113949206 A CN113949206 A CN 113949206A CN 202010689385 A CN202010689385 A CN 202010689385A CN 113949206 A CN113949206 A CN 113949206A
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- Prior art keywords
- magnetic brake
- plate
- handle
- seat
- friction plate
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
- H02K7/1021—Magnetically influenced friction brakes
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/102—Structural association with clutches, brakes, gears, pulleys or mechanical starters with friction brakes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention provides a motor and a magnetic brake, wherein the motor comprises a stator assembly, a rotor assembly and a magnetic brake, the magnetic brake comprises a magnetic brake seat, a moving plate, a friction plate and a fixed plate, the moving plate can axially move relative to the magnetic brake seat, and the fixed plate is fixedly connected with the magnetic brake seat; the magnetic brake is electrified to release braking when the power is on, and the magnetic brake is not electrified to brake when the power is off. The invention adopts the full-ring friction plate structure which forms dynamic contact with the rotor cover, is beneficial to the process control of motor assembly, and can eliminate the product defect caused by axial accumulated error; and the double-sided brake contact area is larger, and the braking effect is stronger.
Description
Technical Field
The invention relates to a motor, in particular to a hub motor and an electromagnetic braking device for the motor.
Background
The hub motor of the existing electric vehicle adopts a brushless toothless or brushless toothed motor, and both the two types are applied to various products in large quantity at present. The braking is completed by means of an external mechanical structure or an electronic brake. The mechanical brake has a complex structure, dust and silt enter the exposed part of the brake to weaken the brake effect, the brake cable routing and the brake handle occupy the whole vehicle space, the attractiveness of the whole vehicle is affected, and the comprehensive cost is high; the electronic brake has poor effect at low speed and no parking brake capability. Meanwhile, some solutions for the single-drive function of the hub motor are available on the market at present. But there is no feasible solution in the form of a dual drive function.
And because the existing hub motor generally has no power-off automatic braking function, the automatic parking can not be finished under the condition of normal power-off on the uphill and downhill, and the braking is finished by manual control. On some mobile equipment with higher special safety requirements, such as electric wheelchairs and AGV vehicles, the applicability of the hub motor is poor.
The designer is based on the practical experience and professional knowledge which are abundant for many years when the product is designed and manufactured, and the designer is matched with the application of scholars to actively carry out research and innovation so as to create the hub motor with a novel structure and make the hub motor more practical. After continuous research and design, and repeated trial production and improvement, the invention with practical value is finally created.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a motor with a stronger parking brake function.
The technical scheme is as follows: in order to solve the technical problems, the motor provided by the invention comprises a stator assembly, a rotor assembly and a magnetic brake, wherein the magnetic brake comprises a magnetic brake seat, a movable plate, a friction plate and a fixed plate, and the movable plate can axially move relative to the magnetic brake seat and is circumferentially fixed; the stator is fixedly connected with the magnetic brake seat;
when the power is on, the magnetic brake is electrified to release braking, the moving plate is attracted to the magnetic brake seat, and the friction plate freely rotates along with the rotor cover;
when the power is cut off, the magnetic brake is not used for braking, the movable plate is pushed to the fixed plate by the pressure spring arranged in the magnetic brake seat, the friction plate is clamped by the fixed plate and the movable plate, and the rotation is stopped.
Specifically, the friction plate is in a ring shape, the outer circumference of the friction plate is provided with a clamping lug, the rotor cover is provided with a clamping groove, and the clamping lug and the clamping groove form constraint in the circumferential direction and form movable contact in the axial direction.
Furthermore, a manual unlocking device is arranged on the magnetic brake to realize manual pushing, the manual unlocking device comprises a pull rod, steel balls, a pressure spring, a handle and a pressing plate, pull rod fixing holes are formed in the periphery of the pressing plate, steel ball positioning holes are formed in the inner side of the handle, and a motor shaft through hole is formed in the center of the pressing plate; the positioning steel balls move in the steel ball guide grooves, the depth of one end of each steel ball guide groove gradually increases from one end to the other end (a height groove), the positioning steel balls are arranged in the positioning holes, one side of each positioning steel ball is in contact with the steel ball guide grooves of the magnetic brake seats, and the other side of each positioning steel ball is limited by the positioning holes of the handle.
The movable piece can move axially and can not rotate circumferentially by changing the positions of the rotating handle and the steel balls in the guide groove. The movable plate and the magnetic brake seat can be separated and combined through the pull rod and the handle. The specific principle is that when the handle is pulled, the steel balls move in the high-low grooves, a gap is formed between the handle and the end face of the magnetic brake seat at a high position, the handle drives the pull rod, the movable piece is far away from the fixed piece, and then the brake is released manually.
The magnetic brake device comprises a magnetic brake, a handle, a magnetic brake and a magnetic brake, wherein the magnetic brake is arranged on the magnetic brake; when a vehicle needs to be manually pushed, the handle releases the circuit switch to disconnect the circuit, so that the influence on the service life of the product caused by power consumption and heating when the magnetic brake is electrified and attracted for a long time is avoided.
Specifically, the handle adopts the sectional type structure of handle seat and handle pole, and handle seat and handle pole are by the screw connection, arrange two sets of screw holes on the handle seat, and the screw hole is used for installing left side handle pole or right side handle pole, adapts to the installation requirement of left and right motor. The excircle of the handle seat is smaller than the magnetic brake seat, so that the installation of the end cover and the end cover bearing is facilitated.
Specifically, the handle seat is provided with an arc groove corresponding to the steel ball guide groove, and a positioning pin is arranged in the arc groove to control the rotation range of the handle body. The magnetic brake is also provided with a stator spacer bush, the stator is fixed on the magnetic brake seat, and the stator and the magnetic brake seat are provided with stator spacer bushes. The distance between the stator plate and the magnetic brake seat is controlled by the stator plate spacer bush. The stator fixing screw and the spacer bush can limit the circumferential rotation of the moving plate, and the moving plate can axially move along the spacer bush.
The invention also provides a magnetic brake, which comprises a magnetic brake seat, a movable plate, a friction plate and a fixed plate; the friction plate is annular, clamping lugs are arranged on the outer circumference of the friction plate, and the clamping lugs and clamping grooves of the rotor cover are in spline constraint in the circumferential direction and form movable contact in the axial direction;
when the power is on, the brake is released, the moving plate is attracted to the magnetic brake seat, the friction plate rotates along with the rotor cover, the motor rotates, and the vehicle runs;
when the brake is off, the moving plate is pushed to the fixed plate by a pressure spring arranged in the magnetic brake seat, and the friction plate is clamped by the fixed plate and the moving plate to stop the vehicle.
Specifically, the handle of the installation of magnetism seat outside of stopping can adopt different stop gear forms, for example the handle is installed in three leaf formula clamp plates below, or the handle is installed on the transition seat, installs the jump ring on the tubular arch of transition seat.
The invention principle is as follows: the form of hanging the moving plate by three pull rods is adopted, a movable gap of 15-20 threads is reserved among the moving plate, the friction plate, the fixed plate and the magnetic brake seat, and the adjustment can be directly carried out through the threads of the pull rods in the assembling process. The friction plate is annular, the outer circumference of the friction plate is provided with a clamping lug, the end face of the rotor cover is provided with a clamping groove matched with the clamping lug, the clamping lug and the clamping groove form spline type restraint in the circumferential direction, and meanwhile, the axial direction of the friction plate is provided with a movable gap, so that the rotor cover and the friction plate form movable contact in the axial direction, the motor assembly is facilitated, and the product defect caused by accumulated errors can be eliminated; when the brake is used, the friction torque is generated on the two sides of the whole circular ring of the friction plate, the friction area is doubled, and the effect is greatly improved.
Has the advantages that: the invention provides a highly integrated electromagnetic braking mechanism for a hub motor, directly completes the braking of a vehicle through the electric braking system of the wheel hub motor, optimizes the complex integral vehicle structure of mechanical structure braking, and perfects the automatic slope-parking function lacking in electronic braking; the device keeps the braking state all the time after the vehicle is stopped, and prevents the vehicle from sliding or sliding backwards; when the manual pushing is needed, the movable piece can be closed by the handle to be manually pushed.
The rotor cover and the friction plate are in movable contact, so that the motor assembly is facilitated, and the product defect caused by accumulated errors can be eliminated; meanwhile, the friction plate is a combination of full-ring and double-sided braking, so that the braking effect is better; moreover, the handle is in a bidirectional position, and convenience is provided for left and right installation of the double-drive motor. The device is suitable for left and right installation driving forms, is favorable for realizing double driving of the vehicle, and meets the requirements of slope-parking braking function by utilizing the differential steering function of left and right wheels.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above. In order to make the objects, technical solutions and advantages of the present invention clearer, other technical problems, other technical features included in the technical solutions and advantages brought by the technical features which can be solved by the present invention will be described more clearly and completely with reference to the accompanying drawings in the embodiments of the present invention.
Drawings
Fig. 1 is a schematic structural view of a motor of embodiment 1 of the invention;
FIG. 2 is a schematic structural view of the rotor cover of FIG. 1;
FIG. 3 is an assembly view of the magnetic brake of FIG. 1;
FIG. 4 is a cross-sectional view of the magnetic brake of FIG. 1;
FIG. 5 is a schematic view of the use of the handle segment design;
FIG. 6 is a schematic view of a handle employing a transition seat mounting arrangement;
in the figure: the magnetic brake device comprises a stator assembly 1, a rotor assembly 2, a magnetic brake protective cover 3, a magnetic brake 4, a rotor cover 24, a magnetic brake seat 401, a fixed plate 402, a friction plate 403, a movable plate 404, a fixed plate spacer 405, a pull rod 406, a steel ball 407, a handle 408, a handle seat 4081, a handle bar 4082, a microswitch 410, a transition seat 411, a pressure plate 412 and a positioning pin 413.
Detailed Description
Examples
The motor of this embodiment is as shown in fig. 1, and comprises stator module 1, rotor module 2 and magnetism 4 three parts of stopping, and the magnetism 4 of stopping is gone up to install and is used for waterproof, dirt-proof magnetism to stop protection casing 3.
In the stator assembly 1, the stator punching sheet is connected with a motor shaft through a flat key after being stacked and wound to assemble an electric appliance. The magnetic steel sheet is attached to the inner side of the rotor, the other side of the rotor is in screw connection with a gear train component and is connected with the gear train component through a sun wheel, a planet wheel, an inner gear ring and a wheel hub to output speed reduction and torque increase for the motor.
In the rotor assembly 2, the rotor opening side is screwed to the rotor cover 24, and the rotor assembly is used to convert electrical energy into kinetic energy. The rotor cover 24 shown in fig. 2 has a locking groove matching with the locking lug on the outer circumference of the friction plate.
As shown in fig. 3 and 4, the magnetic brake 4 includes a magnetic brake seat 401 with an electromagnetic coil inside, a moving plate 404 made of ferromagnetic material and attracted by the magnetic brake seat, a friction plate 403, a fixed plate 402, a fixed plate spacer 405, a pull rod 406, a steel ball 407, a compression spring, a handle 408, a microswitch 410 and a three-blade-shaped pressure plate 412. A coil is arranged in an inner groove of the magnetic brake seat 401, a pressure spring fixing hole, a pull rod transition hole and a stator fixing threaded hole are formed in the periphery of the magnetic brake seat 401, and the magnetic brake seat 401 is fixedly connected with a motor shaft flat key; the friction plate 403 is in a circular ring shape, clamping lugs are arranged on the outer circumferential edge of the friction plate, the friction plate is arranged between the movable plate 404 and the fixed plate 402, when the brake is performed, friction torque is generated on two sides of the friction plate 403, and the effect is doubled; the moving plate 404 can move axially relative to the magnetic brake base 401, and the fixed plate 402 is fixedly connected with the magnetic brake base 401. The magnetic brake 4 is further provided with a stator spacer 405, the stator 402 is fixedly mounted on the magnetic brake seat 401 through bolts and stator fixing threaded holes, and the distance between the stator 402 and the magnetic brake seat 401 is controlled by the stator spacer 405.
And one end of the magnetic brake 4 far away from the stator 402 is provided with a positioning steel ball 407, a handle 408, a three-blade pressure plate 412 and a pull rod 406. The periphery of the pressing plate 412 is provided with a fixing hole corresponding to the pull rod 406, the inner side of the handle 408 is provided with a steel ball positioning hole, and the center is provided with a through hole communicated with a motor shaft; the positioning steel ball 407 moves in the steel ball guide groove of the magnetic brake seat 401, the depth of the steel ball guide groove gradually increases from one end to the other end, one side of the positioning steel ball 407 is in contact with the magnetic brake seat, the other side of the positioning steel ball 407 is engaged with the handle steel ball positioning hole, the handle 408 is rotated to change the two positions of the steel ball 407 in the guide groove, the movable plate 404 axially moves, and the movable plate 404 is separated from and separated from the magnetic brake seat 401 through the pull rod 406 and the handle 408.
A microswitch 410 is further arranged at one end of the magnetic brake 4 far away from the stator 402, and the handle 408 can control the power on and off of the magnetic brake 4 by controlling the microswitch 410. The handle 408 releases the circuit switch to disconnect the circuit, thereby avoiding power consumption, heating and service life reduction when the magnetic brake is electrified and attracted for a long time. Meanwhile, the handle 408 is provided with a limiting arc groove, and the magnetic brake seat 401 is provided with a positioning pin 413 for controlling the rotation range of the handle.
In the normal state, the handle 408 bump triggers the microswitch 410 contact. After the motor is electrified, the magnetic brake 4 is electrified, the moving plate 404 is attracted to the magnetic brake seat, the friction plate 403 can rotate along with the rotor cover 24 at the moment and is in a free state, and the magnetic brake 4 releases braking at the moment.
After the motor is powered off, the magnetic brake 4 is powered off, at this time, the moving plate 404 is pushed to the fixed plate 402 by the pressure spring built in the magnetic brake seat, and the friction plate 403 is in a non-free state, so that the rotor assembly 2 stops rotating, namely the magnetic brake 4 brakes.
At this time, by pulling the handle, the steel ball 407 moves in the high-low groove, a gap is generated between the handle and the end face of the magnetic brake seat at a high position, the handle drives the pull rod, the movable plate 404 is far away from the fixed plate 402, and the manual brake release is realized.
The braking sequence is as follows: friction plate-rotor cover-rotor-sun wheel-planet wheel-inner gear ring-wheel hub/tyre. Conversely, when released, the wheel may rotate. The magnetic brake principle is explained in detail in the inventor's prior patent application document CN106685137A, and the present application is mainly a further improvement on the basis of the magnetic brake principle.
As shown in fig. 5, the handle 408 is designed to be a handle seat and a handle rod by segments, and is connected by screws, and the handle seat has two sets of screw holes corresponding to each other in the circumferential direction. And the excircle of the handle seat is smaller than that of the magnetic brake seat, so that the installation of the end cover and the end cover bearing is facilitated.
As shown in fig. 6, the handle 408 may also be installed on a transition seat 411 having a structure that a tubular installation boss protrudes from the center, and the clamp spring is sleeved on an annular groove on the boss to install and position the handle. The pull rod 406 penetrates through the magnetic brake seat 401, the moving plate 404 and the transition seat 411 are connected left and right, and the transition seat 411 moves axially when the handle 408 is pulled, so that the moving plate 404 and the magnetic brake seat 401 are separated and combined.
The clamping lugs on the outer circumferential edge of the annular friction plate are used for being embedded into the clamping grooves on the rotor cover to be matched, the annular friction plate and the rotor cover are mutually constrained in the circumferential direction and have a certain movable gap in the axial direction, so that the rotor cover is in movable contact with the friction plate, the motor assembly is facilitated, and the product defect caused by accumulated errors can be eliminated; meanwhile, the friction plate is a combination of full-ring and double-sided braking, so that the braking effect is better; moreover, the handle is in a bidirectional position, and convenience is provided for left and right installation of the double-drive motor. The motor left and right installation driving mode is suitable for a motor left and right installation driving mode, the double-drive and steering functions of a vehicle can be realized, and the slope-parking braking function is met.
The invention adopts the full-ring friction plate structure which forms dynamic contact with the rotor cover, is beneficial to the process control of motor assembly, and can eliminate the product defect caused by accumulated errors; and the double-sided brake combination is realized, and a more reliable brake effect is achieved. In this embodiment, the friction plate and the rotor cover are provided with a clamping lug and a clamping groove structure, and can be extended to other matching structures, which is also within the protection scope of this patent.
The invention provides a brand-new structure and design method for the electromagnetic braking of the hub motor, and a plurality of methods and ways for realizing the technical scheme are provided. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the invention presented in the drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a motor, includes stator module, rotor subassembly and magnetism ware of stopping, its characterized in that: the magnetic brake comprises a magnetic brake seat, a movable plate, a friction plate and a fixed plate; the friction plate is in a ring shape, clamping lugs are arranged on the outer circumference of the friction plate, clamping grooves are formed in the rotor cover, and the clamping lugs and the clamping grooves form constraint in the circumferential direction and form movable contact in the axial direction;
when the rotor is electrified, the moving plate is attracted to the magnetic brake seat, the magnetic brake is electrified to release braking, and the friction plate freely rotates along with the rotor cover;
when the power is cut off, the magnetic brake is not electrified for braking, the moving plate is pushed to the fixed plate by the pressure spring arranged in the magnetic brake seat, the friction plate is clamped by the fixed plate and the moving plate, and the rotation is stopped.
2. The electric machine of claim 1, wherein: the magnetic brake is provided with a manual unlocking device, the manual unlocking device comprises a pull rod, a steel ball, a pressure spring and a handle, when the handle is shifted, the steel ball moves to the high position in a high-low groove, so that the distance between the handle and the magnetic brake seat is increased, the pull rod is driven, the movable piece is far away from the fixed piece, the friction piece is free, and the manual brake release is realized.
3. The electric machine of claim 2, wherein: the magnetic brake is characterized by further comprising a microswitch, wherein the handle controls the power on and off of the magnetic brake by controlling the microswitch, and is used for cutting off a circuit of the magnetic brake in a pushing mode.
4. The electric machine of claim 2, wherein: the handle is designed in a split mode and comprises a handle seat and a handle rod, a left screw hole and a right screw hole are formed in the handle seat, the left screw hole is used for installing the left handle rod, and the right screw hole is used for installing the right handle rod; the diameter of the excircle of the handle seat is smaller than the outer diameter of the magnetic brake seat.
5. The utility model provides a magnetism ware of stopping which characterized in that: comprises a magnetic brake seat, a movable plate, a friction plate and a fixed plate; the friction plate is annular, clamping lugs are arranged on the outer circumference of the friction plate, and the clamping lugs and clamping grooves of the rotor cover are in spline constraint in the circumferential direction and form movable contact in the axial direction;
when the power is on, the brake is released, the moving plate is attracted to the magnetic brake seat, the friction plate rotates along with the rotor cover, the motor rotates, and the vehicle runs;
when the brake is off, the moving plate is pushed to the fixed plate by a pressure spring arranged in the magnetic brake seat, and the friction plate is clamped by the fixed plate and the moving plate to stop the vehicle.
6. The magnetic brake of claim 5, wherein: and the stator plate and the magnetic brake seat are provided with stator plate spacer bushes, and the distance between the stator plate and the magnetic brake seat is controlled by the stator plate spacer bushes.
7. The magnetic brake of claim 5, wherein: the friction plate is a floating full-ring double-sided friction plate, and two sides of the friction plate respectively rub the fixed plate and the movable plate during braking.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689385.2A CN113949206A (en) | 2020-07-17 | 2020-07-17 | Motor and magnetic brake |
| PCT/CN2020/115746 WO2022011822A1 (en) | 2020-07-17 | 2020-09-17 | Motor and magnetic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689385.2A CN113949206A (en) | 2020-07-17 | 2020-07-17 | Motor and magnetic brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113949206A true CN113949206A (en) | 2022-01-18 |
Family
ID=79327030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010689385.2A Pending CN113949206A (en) | 2020-07-17 | 2020-07-17 | Motor and magnetic brake |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113949206A (en) |
| WO (1) | WO2022011822A1 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9748816B2 (en) * | 2014-03-21 | 2017-08-29 | Regal Beloit America, Inc. | Axial flux electric machine including an integral brake and methods of assembling the same |
| CN106685137B (en) * | 2016-08-31 | 2024-03-19 | 南京康尼精密机械有限公司 | Inner brake hub motor |
| CN107539413A (en) * | 2017-10-10 | 2018-01-05 | 南京康尼精密机械有限公司 | Brake motor in end-tooth |
| CN108233611A (en) * | 2018-03-21 | 2018-06-29 | 南京康尼机电股份有限公司 | A kind of motor magnetic brake device |
-
2020
- 2020-07-17 CN CN202010689385.2A patent/CN113949206A/en active Pending
- 2020-09-17 WO PCT/CN2020/115746 patent/WO2022011822A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022011822A1 (en) | 2022-01-20 |
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