CN114094771A - Hollow shaft permanent magnet synchronous motor and electric control brake booster comprising same - Google Patents
Hollow shaft permanent magnet synchronous motor and electric control brake booster comprising same Download PDFInfo
- Publication number
- CN114094771A CN114094771A CN202111044780.6A CN202111044780A CN114094771A CN 114094771 A CN114094771 A CN 114094771A CN 202111044780 A CN202111044780 A CN 202111044780A CN 114094771 A CN114094771 A CN 114094771A
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- hollow shaft
- motor
- permanent magnet
- magnet synchronous
- bearing
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 39
- 230000006698 induction Effects 0.000 claims abstract description 9
- 238000004804 winding Methods 0.000 claims description 4
- 229910000679 solder Inorganic materials 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 5
- 238000003466 welding Methods 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- 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
Abstract
The invention provides a hollow shaft permanent magnet synchronous motor and an electric control brake booster comprising the same, wherein the motor comprises a shell, a hollow shaft, an electric terminal, a motor position sensor induction rotor and a motor male head; the motor position sensor induction rotor is arranged on one end part of the hollow shaft, the motor position sensor is arranged on the outer end face of the electric terminal, and the motor male head is arranged on the outer side of the upper end part of the shell and is electrically connected with the electric terminal. The invention has the advantages of high precision of the detected rotor position, low motor noise, low cost and simple installation. The thrust angular contact deepened groove ball double-bearing structure is adopted, so that the cost is lower, the centering of the stator and the rotor is better, and the problems of cogging torque, friction torque and noise can be improved.
Description
Technical Field
The invention relates to the field of motors, in particular to a hollow shaft permanent magnet synchronous motor and an electric control brake booster comprising the same.
Background
With the popularization of electric vehicles and automatic driving, the traditional vacuum power-assisted brake cannot be applied to the electric vehicle and is gradually eliminated. The electric control brake booster can not only be perfectly matched with the electric vehicle, but also realize the automatic driving function, so the electric control brake booster is a development trend. The motor is an important part as a power source of the electric control brake.
The hollow shaft motor can directly place the ball screw of the pressure building unit in the hollow shaft, so that the axial space is saved, and the hollow shaft motor is more and more favored.
However, the position sensors of the hollow shaft motors on the existing market adopt gears to transmit rotating speed and position signals and a plurality of split position sensors. The gear type position sensor has the outstanding problems of high noise and poor precision, and the price and the installation cost of the split type position sensor are higher.
In view of the above, the present inventors have developed a hollow shaft permanent magnet synchronous motor and an electrically controlled brake booster including the same, in order to overcome the above technical problems.
Disclosure of Invention
The invention aims to overcome the defects of high noise, poor precision, high cost and the like of a position sensor of a hollow spindle motor in the prior art, and provides a hollow shaft permanent magnet synchronous motor and an electric control brake booster comprising the same.
The invention solves the technical problems through the following technical scheme:
a hollow shaft permanent magnet synchronous motor is characterized by comprising a shell, a hollow shaft, an electric terminal, a motor position sensor induction rotor and a motor male head, wherein the electric terminal is installed in the upper end part of the shell, the hollow shaft is installed in the shell, one end part of the hollow shaft is connected with the electric terminal through a first bearing, and the other end part of the hollow shaft is connected with the lower end part of the shell through a second bearing;
the motor position sensor induction rotor is installed on one end portion of the hollow shaft, the motor position sensor is installed on the outer end face of the electric terminal, and the motor male head is arranged on the outer side of the upper end portion of the shell and electrically connected with the electric terminal, so that the motor position sensor is electrically connected with the motor male head.
According to an embodiment of the invention, a bearing mount is provided on an inner end face of the electrical terminal, the first bearing being mounted on the bearing mount.
According to one embodiment of the invention, the first bearing is a deep groove ball bearing.
According to one embodiment of the invention, the second bearing is a four-point contact bearing.
According to one embodiment of the invention, the four-point contact bearing is an angular contact thrust bearing.
According to one embodiment of the invention, the inner ring of the angular contact thrust bearing is in interference fit with the hollow shaft, and the outer ring of the angular contact thrust bearing is in interference fit with the casing.
According to one embodiment of the invention, a signal pin and a power pin are arranged in the motor male head, and the motor position sensor is communicated with the signal pin and is used for being connected with an external electronic control unit through the signal pin.
According to one embodiment of the present invention, a plurality of connection posts are provided on an outer end face of the electric terminal, and the motor position sensor is mounted on the electric terminal through the connection posts.
According to an embodiment of the invention, a plurality of electric terminal welding hooks are further arranged in the electric terminal, and the stator winding of the hollow shaft permanent magnet synchronous motor is connected with the power supply pin through the electric terminal welding hooks and is used for being connected with an external electronic control unit through the power supply pin.
The invention also provides an electric control brake booster which is characterized by comprising the hollow shaft permanent magnet synchronous motor, a main cylinder bracket and an electronic control unit, wherein the electronic control unit is arranged on the main cylinder bracket, and is provided with an electronic control unit female head which is connected with a motor male head of the hollow shaft permanent magnet synchronous motor.
According to one embodiment of the invention, a gap is provided between the housing of the hollow-shaft permanent magnet synchronous motor and the female head of the electronic control unit.
According to one embodiment of the invention, the contact position of the hollow shaft permanent magnet synchronous motor and the electronic control unit is connected through inserting, and the inserting position is sealed by dispensing.
The positive progress effects of the invention are as follows:
the hollow shaft permanent magnet synchronous motor and the electric control brake booster comprising the same have the following advantages:
the position sensor and the hollow shaft motor are taken as a whole, so that the detected rotor position is high in precision, the motor is low in noise and cost, and the mounting is simple.
And the electric terminal of the mounting position sensor and the welding wire terminal are integrated into a part, and the part also has the functions of a bearing seat and connection of an ECU (electronic control unit), so that the number of the parts is reduced, and the mounting space and the part cost are saved.
And a thrust angular contact deepened groove ball double-bearing structure is adopted to replace a single four-point contact bearing, so that the cost is lower, the centering of the stator and the rotor is better, and the problems of cogging torque, friction torque and noise can be improved.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
fig. 1 is a perspective view of a hollow shaft permanent magnet synchronous motor of the present invention.
Fig. 2 is a schematic structural diagram of an electrical terminal in the hollow-shaft permanent magnet synchronous motor according to the present invention.
Fig. 3 is a schematic structural diagram of an electrically controlled brake booster according to the present invention.
[ reference numerals ]
Hollow shaft permanent magnet synchronous motor 100
Motor position sensor induction rotor 150
First bearing 121
Second bearing 122
Connecting post 132
Electrical terminal wire hook 134
Clamping groove 111
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
Fig. 1 is a perspective view of a hollow shaft permanent magnet synchronous motor of the present invention. Fig. 2 is a schematic structural diagram of an electrical terminal in the hollow-shaft permanent magnet synchronous motor according to the present invention.
As shown in fig. 1 and 2, the present invention discloses a hollow shaft permanent magnet synchronous motor 100, which includes a housing 110, a hollow shaft 120, an electrical terminal 130, a motor position sensor 140, a motor position sensor induction rotor 150, and a motor male 160. The electric terminal 130 is installed in the upper end portion of the housing 110, the hollow shaft 120 is installed in the housing 110, one end portion of the hollow shaft 120 is connected to the electric terminal 130 through the first bearing 121, and the other end portion of the hollow shaft 120 is connected to the lower end portion of the housing 110 through the second bearing 122. The motor position sensor induction rotor 150 is installed on one end portion of the hollow shaft 120, the motor position sensor 140 is installed on the outer end surface of the electric terminal 130, and the motor male 160 is disposed outside the upper end portion of the housing 110 and electrically connected with the electric terminal 130, so that the motor position sensor 140 is electrically connected with the motor male 160.
Preferably, a bearing mount 131 is provided on an inner end surface of the electrical terminal 130, and the first bearing 121 is mounted on the bearing mount 131. The first bearing 121 may here preferably be a deep groove ball bearing.
Likewise, the second bearing 122 may preferably be a four-point contact bearing. The four-point contact bearing may again preferably be a thrust angular contact bearing. The inner ring of the angular contact thrust bearing is in interference fit with the hollow shaft 120, and the outer ring of the angular contact thrust bearing is in interference fit with the casing 110. This configuration can reduce the radial clearance of second bearing 122, making the rotor of hollow-shaft permanent-magnet synchronous motor 100 rotate more stably.
The thrust angular contact bearing adopts the mode of interference fit of an inner ring and an outer ring, the deep groove ball bearing adopts the interference of the inner ring and the clearance fit of the outer ring, the low shimmy of a rotor can be realized, and the noise is improved. This construction also enables the advantages of low cost installation and elimination of axial play without additional parts.
Of course, the angular contact thrust bearing described here can also be replaced by a four-point contact bearing, which has no cost advantage in comparison but nevertheless has better bearing performance.
Preferably, a signal pin 161 and a power pin 162 are arranged in the motor male head 160, the motor position sensor 140 is communicated with the signal pin 161, and the motor position sensor 140 is connected with an external electronic control unit 200(ECU) through the signal pin 161.
As shown in fig. 2, a plurality of connection posts 132 are provided on the outer end surface of the electric terminal 130, and the motor position sensor 140 is mounted on the electric terminal 130 through the connection posts 132. The center of the electric terminal 130 is also provided with an annular positioning wall 133, the positioning wall 133 surrounds the bearing mounting seat 131, the motor position sensor 140 is centered by the positioning wall 133, and the positioning wall 133 also has the function of increasing the distance between the motor position sensor 140 and the metal, so that the antistatic effect of the system is better.
Further, a plurality of electric terminal welding hooks 134 are further provided in the electric terminal 130, the stator winding of the hollow shaft permanent magnet synchronous motor is connected to the power supply pin 162 through the electric terminal welding hooks 134, and the stator winding is connected to the external electronic control unit 200 through the power supply pin 162.
Fig. 3 is a schematic structural diagram of an electrically controlled brake booster according to the present invention.
As shown in fig. 3, the present invention further provides an electronic control brake booster, which includes the hollow-shaft permanent magnet synchronous motor 100, a master cylinder bracket 300 and an electronic control unit 200, wherein the electronic control unit 200 is mounted on the master cylinder bracket 300, and an electronic control unit female head 210 is arranged on the electronic control unit 200 and connected with a motor male head 160 of the hollow-shaft permanent magnet synchronous motor 100, so that a signal pin 161 and a power pin 162 are electrically connected with the electronic control unit 200.
Further, a gap 170 is formed between the housing 110 of the hollow-shaft permanent magnet synchronous motor 100 and the female electronic control unit 210, that is, the male motor head 160 and the female electronic control unit 210 are directly inserted into each other, and the male motor head 160 and the female electronic control unit 210 are in clearance fit. The gap 170 is used for ventilation, so that the hollow-shaft permanent magnet synchronous motor 100 and the electronic control unit 200(ECU) can share a ventilation function, the internal volume is larger, and the use strength of the ventilation film is reduced.
The hollow shaft permanent magnet synchronous motor 100 is connected with the electronic control unit 200 at the contact position by plugging, and the plugging position is sealed by dispensing. For example, a clamping groove 111 or a clamping buckle is arranged on the outer wall surface of the casing 110, a clamping buckle 112 or a clamping groove is arranged on the outer wall surface of the corresponding electronic control unit 200, and the clamping groove 111 and the clamping buckle 112 are correspondingly connected in a clamping manner. Of course, this is merely an example, and other connection methods may be adopted, and are within the scope of the present application.
According to the structural description, the hollow shaft permanent magnet synchronous motor and the electric control brake booster comprising the same realize the following advantages through structural improvement:
the motor position sensor and the hollow shaft motor are integrated, so that the detected rotor position is high in precision, the motor is low in noise, the cost is low, and the installation is simple.
And the electric terminal for mounting the motor position sensor and the welding wire terminal are integrated into a part, and the part also has the functions of a bearing seat and a connection Electronic Control Unit (ECU), so that the number of the parts is reduced, and the mounting space and the part cost are saved.
And a double-bearing structure adopting a thrust angular contact bearing and a deep groove ball bearing replaces a single four-point contact bearing, so that the cost is lower, the centering of the stator and the rotor is better, and the problems of cogging torque, friction torque and noise can be improved.
Fourth, the public head of motor and Electronic Control Unit (ECU) female head are direct to inserting, guarantee the stability of switching on through size and detailed design, have the pioneering meaning, can replace the existing pencil scheme in market, or the scheme that power and signal separately put through, and it has practiced thrift cost and installation complexity.
And fifthly, the motor shell and an Electronic Control Unit (ECU) shell are sealed by dispensing, so that direct ventilation of the motor and the ECU can be realized, and the ventilation requirement of the motor is realized at zero cost.
And sixthly, the Printed Circuit Board Assembly (PCBA) is isolated from the motor hollow shaft by adopting a plastic collar, so that the central positioning and static electricity blocking of the Printed Circuit Board Assembly (PCBA) are realized.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (12)
1. A hollow shaft permanent magnet synchronous motor is characterized by comprising a shell, a hollow shaft, an electric terminal, a motor position sensor induction rotor and a motor male head, wherein the electric terminal is installed in the upper end part of the shell, the hollow shaft is installed in the shell, one end part of the hollow shaft is connected with the electric terminal through a first bearing, and the other end part of the hollow shaft is connected with the lower end part of the shell through a second bearing;
the motor position sensor induction rotor is installed on one end portion of the hollow shaft, the motor position sensor is installed on the outer end face of the electric terminal, and the motor male head is arranged on the outer side of the upper end portion of the shell and electrically connected with the electric terminal, so that the motor position sensor is electrically connected with the motor male head.
2. A hollow shaft permanent magnet synchronous machine according to claim 1, wherein a bearing mount is provided on an inboard end face of said electrical terminal, said first bearing being mounted on said bearing mount.
3. The hollow shaft permanent magnet synchronous machine of claim 2, wherein the first bearing is a deep groove ball bearing.
4. The hollow shaft permanent magnet synchronous machine of claim 1, wherein said second bearing is a four-point contact bearing.
5. The hollow shaft permanent magnet synchronous machine of claim 4, wherein said four-point contact bearing is an angular contact thrust bearing.
6. A hollow shaft permanent magnet synchronous machine according to claim 5, wherein the inner race of the angular contact thrust bearing is in interference fit with the hollow shaft and the outer race of the angular contact thrust bearing is in interference fit with the housing.
7. The hollow shaft permanent magnet synchronous motor according to claim 1, wherein a signal pin and a power pin are provided in the motor male, and the motor position sensor is in communication with the signal pin for connection with an external electronic control unit through the signal pin.
8. The hollow shaft permanent magnet synchronous machine of claim 7, wherein a plurality of connection posts are provided on an outer end face of said electrical terminal, said motor position sensor being mounted on said electrical terminal through said connection posts.
9. The pmsm of claim 7, wherein said electrical terminals further comprise a plurality of electrical terminal solder hooks disposed therein, said pmsm stator windings being connected to said power pins by said electrical terminal solder hooks for connection to an external electronic control unit by said power pins.
10. An electronic control brake booster, characterized in that, the electronic control brake booster includes the hollow shaft permanent magnet synchronous motor according to any one of claims 1 to 9, a main cylinder bracket and an electronic control unit, the electronic control unit is installed on the main cylinder bracket, and the electronic control unit is provided with an electronic control unit female head which is connected with a motor male head of the hollow shaft permanent magnet synchronous motor.
11. An electrically controlled brake booster as set forth in claim 10 wherein there is a gap between the housing of said hollow-shaft permanent magnet synchronous motor and the female head of said electronic control unit.
12. An electrically controlled brake booster as claimed in claim 10, wherein the hollow shaft permanent magnet synchronous motor is connected to the electronic control unit at the contact point by means of plug-in connection, and the plug-in connection is sealed by means of dispensing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111044780.6A CN114094771B (en) | 2021-09-07 | 2021-09-07 | Hollow shaft permanent magnet synchronous motor and electric control brake booster comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111044780.6A CN114094771B (en) | 2021-09-07 | 2021-09-07 | Hollow shaft permanent magnet synchronous motor and electric control brake booster comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114094771A true CN114094771A (en) | 2022-02-25 |
| CN114094771B CN114094771B (en) | 2023-04-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111044780.6A Active CN114094771B (en) | 2021-09-07 | 2021-09-07 | Hollow shaft permanent magnet synchronous motor and electric control brake booster comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114094771B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050179329A1 (en) * | 2004-02-12 | 2005-08-18 | Mitsubishi Denki Kabushiki Kaisha | Motor for electric power steering apparatus |
| CN102593997A (en) * | 2011-01-07 | 2012-07-18 | 德昌电机(深圳)有限公司 | Motor |
| US20130002069A1 (en) * | 2011-06-30 | 2013-01-03 | Asmo Co., Ltd. | Motor |
| US20150091402A1 (en) * | 2013-10-02 | 2015-04-02 | Lg Innotek Co., Ltd. | Motor |
| CN109774693A (en) * | 2018-12-28 | 2019-05-21 | 联创汽车电子有限公司 | Actively build press mechanism |
| US20200208698A1 (en) * | 2017-09-26 | 2020-07-02 | Tamas Co., Ltd. | Electronic brake motor structure with ball screw |
| US20200269825A1 (en) * | 2017-09-20 | 2020-08-27 | Continental Teves Ag & Co. Ohg | Electric hollow shaft motor |
| CN213693258U (en) * | 2020-12-07 | 2021-07-13 | 惠州市龙德科技有限公司 | Brushless motor outer rotor structure for unmanned aerial vehicle |
-
2021
- 2021-09-07 CN CN202111044780.6A patent/CN114094771B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050179329A1 (en) * | 2004-02-12 | 2005-08-18 | Mitsubishi Denki Kabushiki Kaisha | Motor for electric power steering apparatus |
| CN102593997A (en) * | 2011-01-07 | 2012-07-18 | 德昌电机(深圳)有限公司 | Motor |
| US20130002069A1 (en) * | 2011-06-30 | 2013-01-03 | Asmo Co., Ltd. | Motor |
| US20150091402A1 (en) * | 2013-10-02 | 2015-04-02 | Lg Innotek Co., Ltd. | Motor |
| US20200269825A1 (en) * | 2017-09-20 | 2020-08-27 | Continental Teves Ag & Co. Ohg | Electric hollow shaft motor |
| US20200208698A1 (en) * | 2017-09-26 | 2020-07-02 | Tamas Co., Ltd. | Electronic brake motor structure with ball screw |
| CN109774693A (en) * | 2018-12-28 | 2019-05-21 | 联创汽车电子有限公司 | Actively build press mechanism |
| CN213693258U (en) * | 2020-12-07 | 2021-07-13 | 惠州市龙德科技有限公司 | Brushless motor outer rotor structure for unmanned aerial vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114094771B (en) | 2023-04-04 |
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Effective date of registration: 20240220 Address after: 201206 building 4, Lane 33, Jinji Road, Pudong New Area, Shanghai Patentee after: DIAS AUTOMOTIVE ELECTRONIC SYSTEM Co.,Ltd. Country or region after: China Address before: 200122 No. 1493 South Pudong Road, Shanghai, Pudong New Area Patentee before: SHANGHAI HUIZHONG AUTOMOTIVE MANUFACTURING Co.,Ltd. Country or region before: China |