CN114151464A - Ball screw type electromagnetic braking clutch actuating mechanism - Google Patents

Ball screw type electromagnetic braking clutch actuating mechanism Download PDF

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Publication number
CN114151464A
CN114151464A CN202111572812.XA CN202111572812A CN114151464A CN 114151464 A CN114151464 A CN 114151464A CN 202111572812 A CN202111572812 A CN 202111572812A CN 114151464 A CN114151464 A CN 114151464A
Authority
CN
China
Prior art keywords
ball screw
compensation
shell
electromagnetic brake
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111572812.XA
Other languages
Chinese (zh)
Inventor
周芳誉
朱江
黄伟
周荣辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Suzhou Automotive Research Institute of Tsinghua University
Original Assignee
Tsinghua University
Suzhou Automotive Research Institute of Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsinghua University, Suzhou Automotive Research Institute of Tsinghua University filed Critical Tsinghua University
Priority to CN202111572812.XA priority Critical patent/CN114151464A/en
Publication of CN114151464A publication Critical patent/CN114151464A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D28/00Electrically-actuated clutches
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H25/00Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20Screw mechanisms
    • F16H25/22Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
    • F16H25/2204Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D2023/123Clutch actuation by cams, ramps or ball-screw mechanisms

Abstract

The invention discloses a ball screw type electromagnetic braking clutch actuating mechanism, which comprises a mechanism main body, wherein the mechanism main body comprises a shell, a compensation shell, a ball screw, a screw nut and a taper sleeve, one end of the shell is provided with an electromagnetic brake and a driving motor, the driving motor can drive the ball screw to rotate, the electromagnetic brake is used for braking the rotation of the ball screw, the other end of the shell is provided with the compensation shell, the compensation shell is connected with the shell in a sliding way, the end part of the compensation shell is provided with a push rod, the push rod is close to a clutch separation rocker arm, the screw nut is arranged on the ball screw, the taper sleeve is arranged outside the screw nut in a matching way, the taper sleeve and the screw nut can move along the ball screw, when the driving motor drives the ball screw to rotate, and then the taper sleeve moves towards the direction of the push rod through the driving of the screw nut, the taper sleeve drives the compensation shell to move through a transmission mechanism, thereby driving the push rod to move. The clutch actuating mechanism has high transmission efficiency and also has a self-locking function.

Description

Ball screw type electromagnetic braking clutch actuating mechanism
Technical Field
The invention belongs to the technical field of transmissions, and particularly relates to a ball screw type electromagnetic braking clutch actuating mechanism.
Background
The clutch actuating mechanism of the existing mechanical automatic transmission mainly has the forms of electric control, pneumatic control, hydraulic control and the like, but the pneumatic control and the hydraulic control of the clutch actuating mechanism have the defects of high requirements on valves, high requirements on machining precision, complex control, poor stability and the like, so that the clutch actuating mechanism of the mechanical automatic transmission in China mostly adopts the electric control form, namely, a motor drives a lead screw or a worm gear mechanism.
According to the working characteristics of the clutch, the clutch needs to be kept in a certain state, and the motor is required to continuously provide locked-rotor torque at the moment, so that the service life of the motor is not facilitated, and the energy consumption is high; in order to avoid the situation that the motor continuously outputs the torque, the clutch executing mechanism is required to have a self-locking function. At present, an electric control clutch actuating mechanism usually adopts a transmission mode of a worm gear and a worm and a sliding screw (such as a trapezoidal lead screw) with a self-locking function, but the efficiency of the two transmission modes is extremely low and is generally lower than 40%, and the heating temperature of the two transmission modes is increased quickly, so that the worm gear or the lead screw nut is worn quickly, the function of the clutch is further lost, and the service life of the system is greatly reduced. In addition, the clutch plate can be worn in the using process, and the stroke of a push rod of the clutch executing mechanism is changed. Therefore, there is a high necessity for a ball screw type electromagnetic brake clutch actuator capable of solving the above problems.
Disclosure of Invention
Aiming at the technical problems, the invention provides the ball screw type electromagnetic brake clutch actuating mechanism which is high in transmission efficiency and has a self-locking function.
The technical scheme of the invention is as follows:
a ball screw type electromagnetic braking clutch actuating mechanism comprises a mechanism main body, wherein the mechanism main body comprises a shell, a compensation shell, a ball screw, a screw nut and a taper sleeve, the ball screw, the screw nut and the taper sleeve are arranged in the shell, an electromagnetic brake and a driving motor are arranged at one end of the shell, the driving motor can drive the ball screw to rotate, the electromagnetic brake is used for braking the rotation of the ball screw so as to lock or release the ball screw, the compensation shell is arranged at the other end of the shell, the compensation shell is connected with the shell in a sliding mode, a push rod is arranged at one end, close to the outer side of the compensation shell, is close to a clutch separation rocker arm, the screw nut is arranged on the ball screw, the taper sleeve is arranged on the outer portion of the screw nut in a matching mode, and the taper sleeve and the screw nut can move along the ball screw, when the driving motor drives the ball screw to rotate and then the taper sleeve moves towards the push rod direction under the driving of the screw nut, the taper sleeve drives the compensation shell to move through the transmission mechanism so as to drive the push rod to move.
Preferably, the transmission mechanism comprises a limiting sleeve, the limiting sleeve is fixedly installed in the shell, and the limiting sleeve is matched with the taper sleeve.
Preferably, the transmission mechanism further comprises a limiting steel ball, a steel ball sleeve and a clearance elimination compensation spring, the steel ball sleeve is arranged inside the compensation shell in a sliding mode, a limiting steel ball position space is formed between the limiting sleeve and the taper sleeve, the limiting steel ball is installed in the limiting steel ball position space, the limiting steel ball is prevented from falling off, the clearance elimination compensation spring is arranged between the steel ball sleeve and the end portion of the limiting shell, provided with the push rod, and is always in a compression state, and the clearance elimination compensation spring can achieve clearance elimination pre-tightening and friction plate abrasion compensation of the clutch.
Preferably, the steel ball sleeve is provided with a first spring clamping groove matched with the anti-backlash compensation spring.
Preferably, an inward protruding bump is arranged at one end of the compensation shell close to the outside, the push rod is mounted on the bump, and a second spring clamping groove is formed between the bump and the side wall of the compensation shell.
Preferably, the compensation casing leans on interior one end to locate the inside of casing, just be equipped with the spacing platform of slip on the compensation casing, shells inner wall be equipped with the spacing platform matched with slip spacing groove of slip plays the effect that prevents the landing of compensation casing.
Preferably, the driving motor is matched with the ball screw through a flat structure to realize the transmission of torque.
Preferably, one end of the ball screw, which is close to the driving motor, penetrates through the shell, and a ball screw bearing is further arranged at the contact position of the shell and the ball screw.
Preferably, the mechanism body further comprises a position sensor for detecting the position of the compensation housing and thus the state of the clutch.
Preferably, an adjusting gasket is further arranged between the push rod and the compensation shell.
The invention has the beneficial effects that:
(1) the invention provides a ball screw type electromagnetic brake clutch actuating mechanism, when a driving motor drives a ball screw to rotate forwards, and then the push rod is driven to move rightwards through the matching of structures such as a screw nut, a taper sleeve, a transmission mechanism, a supplement shell and the like, the push rod pushes a clutch release bearing through a clutch release rocker arm to realize the separation of the clutch, when the driving motor drives the ball screw to rotate reversely, the taper sleeve is separated from the limiting steel ball of the transmission mechanism, the push rod moves rightwards under the counterforce of the clutch, thereby realizing the combination of the clutch, the electromagnetic brake clutch actuating mechanism has high transmission efficiency which is up to more than 90%, the selection of a high-efficiency transmission mode can greatly reduce the required power torque of a driving motor, reduce the heat productivity in the working process, further reduce the cost, save the space, improve the system stability and prolong the service life;
(2) the clutch actuator is also provided with an electromagnetic brake, and the electromagnetic brake can lock or release the ball screw, so that the clutch actuator has a self-locking function, and the ball screw can be perfectly exerted with high efficiency;
(3) the invention is also provided with a backlash compensation spring which can realize backlash pre-tightening of the clutch and friction plate abrasion compensation.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural view of the mechanism body of the present invention.
Labeled as: 1. a mechanism main body; 2. an electromagnetic brake; 3. a drive motor; 4. a housing; 5. a compensation housing; 6. a ball screw; 7. a lead screw nut; 8. a taper sleeve; 9. a push rod; 10. a limiting sleeve; 11. a limiting steel ball; 12. a steel ball sleeve; 13. a backlash compensation spring; 14. a first spring catch; 15. a bump; 16. a second spring catch; 17. a sliding limit table; 18. a sliding limit groove; 19. a ball screw bearing; 20. and adjusting the gasket.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1 and 2, an actuating mechanism of a ball screw type electromagnetic brake clutch includes a mechanism body 1, the mechanism body 1 includes a housing 4, a compensation housing 5, a ball screw 6 disposed inside the housing 4, a screw nut 7 and a taper sleeve 8, one end of the housing 4 is provided with an electromagnetic brake 2 and a driving motor 3, one end of the ball screw 6 close to the driving motor 3 passes through the housing 4, a ball screw bearing 19 is further disposed at a contact position of the housing 4 and the ball screw 6, the driving motor 3 can drive the ball screw 6 to rotate, the driving motor 3 is matched with the ball screw 6 through a flat position structure to realize torque transmission, the electromagnetic brake 2 is used for braking rotation of the ball screw 6, and further locking or releasing the ball screw 6.
The other end of casing 4 is equipped with compensation casing 5, and compensation casing 5 and casing 4 sliding connection, the inside of casing 4 is located to the one end that compensation casing 5 leaned on in, and is equipped with the spacing platform 17 of slip on the compensation casing 5, and the casing 4 inner wall is equipped with the spacing groove 18 of slip with the spacing platform 17 matched with that slides, plays the effect that prevents the landing of compensation casing 5. A push rod 9 is installed at one end, close to the outside, of the compensation shell 5, the push rod 9 is close to the clutch release rocker arm, an adjusting gasket 20 is further arranged between the push rod 9 and the compensation shell 5, and the distance between the push rod 9 and the clutch release rocker arm is adjusted by the adjusting gasket 20. Screw nut 7 is installed on ball 6, and the outside at screw nut 7 is installed in the cooperation of taper sleeve 8, and taper sleeve 8 and screw nut 7 can be along ball 6 motions, and drive ball 6 when driving motor 3 rotates, then taper sleeve 8 passes through screw nut 7's drive and when moving towards push rod 9 direction, taper sleeve 8 passes through drive mechanism and drives compensation casing 5 and remove, and then drives push rod 9's removal. The transmission mechanism comprises a limiting sleeve 10, a limiting steel ball 11, a steel ball sleeve 12 and a backlash compensation spring 13, wherein the limiting sleeve 10 is fixedly installed inside a shell 4, the limiting sleeve 10 is matched with a taper sleeve 8, the steel ball sleeve 12 is arranged inside a compensation shell 5 in a sliding mode, a limiting steel ball position space is formed between the limiting sleeve 10 and the taper sleeve 8 and the steel ball sleeve 12, the limiting steel ball 11 is installed in the limiting steel ball position space, the limiting steel ball 11 is prevented from falling off, the backlash compensation spring 13 is arranged between the steel ball sleeve 12 and the end portion of the limiting shell 4, on which a push rod 9 is installed, the backlash compensation spring 13 is always in a compression state, the backlash compensation spring 13 can well compensate displacement changes caused by abrasion of a clutch friction plate, and pre-tightening of a clutch release bearing can be achieved.
The mechanism body 1 also comprises a position sensor for detecting the position of the compensating housing 5, and thus the state of the clutch, which can be mounted on the housing. In addition, the steel ball sleeve 12 is provided with a first spring clamping groove 14 matched with the anti-backlash compensation spring 13, one end, close to the outside, of the compensation shell 5 is provided with a convex block 15 protruding inwards, the push rod 9 is installed on the convex block 15, a second spring clamping groove 16 is formed between the convex block 15 and the side wall of the compensation shell 5, and the anti-backlash compensation spring 13 is convenient to install and use due to the arrangement of the first spring clamping groove 14 and the second spring clamping groove 16. The actuating mechanism of the ball screw type electromagnetic braking clutch has high transmission efficiency which is up to more than 90 percent, and the selection of the high-efficiency transmission mode can greatly reduce the required power torque of the driving motor 3, reduce the heat productivity in the working process, further reduce the cost, save the space, improve the stability of the system and prolong the service life. In addition, the electromagnetic brake 2 can lock or release the ball screw 6, so that the clutch actuating mechanism has a self-locking function, and the high efficiency of the ball screw 6 can be perfectly exerted.
In the using process, when the clutch is to be separated, the electromagnetic brake 2 is electrified, the electromagnetic brake 2 releases the ball screw 6, the driving motor 3 rotates forward to drive the ball screw 6 to rotate, the screw nut 7 moves leftwards along the ball screw 6 to further drive the taper sleeve 8 to move leftwards, when the taper sleeve 8 is in contact with the limiting steel ball 11, acting force is generated to enable the limiting steel ball 11 to be in contact with the compensation shell 5 to push the compensation shell 5 to move leftwards, the push rod 9 moves leftwards along with the compensation shell 5 simultaneously, the push rod 9 pushes the clutch separating rocker arm through the clutch to further push the clutch separating bearing to realize separation of the clutch, in the process, when the clutch needs to be stopped at a certain position, the electromagnetic brake 2 is powered off to lock the ball screw 6 in a locking mode, and therefore the self-locking function is realized; when the clutch is to be combined, the electromagnetic brake 2 is powered on, the electromagnetic brake 2 releases the ball screw 6, the driving motor 3 rotates reversely to drive the ball screw 6 to rotate, the screw nut 7 moves rightwards along the ball screw 6, the taper sleeve 8 is driven to move rightwards, the taper sleeve 8 is separated from the limiting steel ball 11, under the reaction force of the clutch, the push rod 9 moves rightwards, the combination of the clutch is achieved, when the clutch needs to stop at a certain position, the electromagnetic brake 2 is powered off, the ball screw 6 is locked in a locking mode, and the self-locking function is achieved.
When the clutch disc is abraded, the clutch separating rocker arm reversely pushes the push rod 9 to move rightwards, the push rod 9 drives the compensation shell 5 to move rightwards, the compression backlash compensation spring 13 moves rightwards, and the compensation of the abrasion stroke is realized, and the position of the limiting steel ball 11 is limited due to the limitation of the limiting sleeve 10, the steel ball sleeve 12 and the taper sleeve 8, so that the abrasion stroke of the clutch disc is compensated only by compressing the backlash compensation spring 13.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims (10)

1. A ball screw type electromagnetic brake clutch actuating mechanism is characterized by comprising a mechanism main body, wherein the mechanism main body comprises a shell, a compensation shell, a ball screw, a screw nut and a taper sleeve, the ball screw, the screw nut and the taper sleeve are arranged in the shell, an electromagnetic brake and a driving motor are arranged at one end of the shell, the driving motor can drive the ball screw to rotate, the electromagnetic brake is used for braking the rotation of the ball screw, the compensation shell is arranged at the other end of the shell, the compensation shell is connected with the shell in a sliding mode, a push rod is arranged at one end, close to the outer side, of the compensation shell, the push rod is close to a clutch release rocker arm, the screw nut is arranged on the ball screw, the taper sleeve is arranged outside the screw nut in a matching mode, and the taper sleeve and the screw nut can move along the ball screw, when the driving motor drives the ball screw to rotate and then the taper sleeve moves towards the push rod direction under the driving of the screw nut, the taper sleeve drives the compensation shell to move through the transmission mechanism so as to drive the push rod to move.
2. The ball screw type electromagnetic brake clutch actuator according to claim 1, wherein the transmission mechanism includes a stop collar, the stop collar is fixedly mounted in the housing, and the stop collar is engaged with the taper sleeve.
3. The ball screw type electromagnetic brake clutch actuator according to claim 2, wherein the transmission mechanism further comprises a limiting steel ball, a steel ball sleeve and an anti-backlash compensation spring, the steel ball sleeve is slidably disposed inside the compensation housing, a limiting steel ball position space is formed among the limiting sleeve, the taper sleeve and the steel ball sleeve, the limiting steel ball is mounted in the limiting steel ball position space, the anti-backlash compensation spring is disposed between the steel ball sleeve and the end of the limiting housing where the push rod is mounted, and the anti-backlash compensation spring is always in a compressed state.
4. The ball screw type electromagnetic brake clutch actuator according to claim 3, wherein the steel ball is provided with a first spring slot which is matched with the backlash compensation spring.
5. A ball screw type electromagnetic brake clutch actuator as set forth in claim 3 wherein said compensation housing has an outwardly projecting projection at an end thereof, said push rod being mounted on said projection, and a second spring slot being formed between said projection and a side wall of said compensation housing.
6. The actuator of claim 1, wherein the compensation housing has an inner end disposed inside the housing, and the compensation housing has a sliding stop, and the inner wall of the housing has a sliding stop groove engaged with the sliding stop.
7. The ball screw type electromagnetic brake clutch actuator according to claim 1, wherein the driving motor is configured to transmit torque by cooperating with the ball screw through a flat structure.
8. The ball screw type electromagnetic brake clutch actuator according to claim 1, wherein an end of the ball screw near the driving motor passes through the housing, and a ball screw bearing is further provided at a contact portion of the housing and the ball screw.
9. A ball screw type electromagnetic brake clutch actuator according to claim 1, wherein the mechanism body further includes a position sensor for detecting a position of the compensation housing and thereby a state of the clutch.
10. The ball screw-type electromagnetic brake clutch actuator according to claim 1, wherein an adjustment washer is further provided between the push rod and the compensation housing.
CN202111572812.XA 2021-12-21 2021-12-21 Ball screw type electromagnetic braking clutch actuating mechanism Pending CN114151464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111572812.XA CN114151464A (en) 2021-12-21 2021-12-21 Ball screw type electromagnetic braking clutch actuating mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111572812.XA CN114151464A (en) 2021-12-21 2021-12-21 Ball screw type electromagnetic braking clutch actuating mechanism

Publications (1)

Publication Number Publication Date
CN114151464A true CN114151464A (en) 2022-03-08

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CN202111572812.XA Pending CN114151464A (en) 2021-12-21 2021-12-21 Ball screw type electromagnetic braking clutch actuating mechanism

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2279125A8 (en) * 1993-06-18 Fichtel & Sachs Ag Actuating means for a motor vehicle friction clutch has master cyclinder operated by electric motor via ball and screw
US4918921A (en) * 1987-10-22 1990-04-24 Automotive Products Plc Coaxial push rod and hollow screw ball nut drive for master cylinder
CN204739116U (en) * 2015-06-10 2015-11-04 苏州艾泰普机械有限公司 Transmission separation and reunion structure
KR101820437B1 (en) * 2017-05-25 2018-01-23 계양전기 주식회사 Gear Actuator for Disconnecter Type Clutch
US20200340282A1 (en) * 2019-04-26 2020-10-29 Strattec Power Access Llc Actuator for powered vehicle closure
CN112032214A (en) * 2020-08-28 2020-12-04 清华大学苏州汽车研究院(吴江) Clutch actuating mechanism with self-locking compensation structure
CN217002783U (en) * 2021-12-21 2022-07-19 清华大学苏州汽车研究院(吴江) Ball screw type electromagnetic braking clutch actuating mechanism

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4918921A (en) * 1987-10-22 1990-04-24 Automotive Products Plc Coaxial push rod and hollow screw ball nut drive for master cylinder
GB2279125A8 (en) * 1993-06-18 Fichtel & Sachs Ag Actuating means for a motor vehicle friction clutch has master cyclinder operated by electric motor via ball and screw
CN204739116U (en) * 2015-06-10 2015-11-04 苏州艾泰普机械有限公司 Transmission separation and reunion structure
KR101820437B1 (en) * 2017-05-25 2018-01-23 계양전기 주식회사 Gear Actuator for Disconnecter Type Clutch
US20200340282A1 (en) * 2019-04-26 2020-10-29 Strattec Power Access Llc Actuator for powered vehicle closure
CN112032214A (en) * 2020-08-28 2020-12-04 清华大学苏州汽车研究院(吴江) Clutch actuating mechanism with self-locking compensation structure
CN217002783U (en) * 2021-12-21 2022-07-19 清华大学苏州汽车研究院(吴江) Ball screw type electromagnetic braking clutch actuating mechanism

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
杨柳絮: "一种电动汽车电磁离合器及其控制器的设计", 《中国优秀硕士学位论文全文数据库 (工程科技Ⅱ辑)》, no. 1, 15 January 2019 (2019-01-15) *

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