CN112379187B - Loading device for EMC test of pneumatic wiper motor - Google Patents
Loading device for EMC test of pneumatic wiper motor Download PDFInfo
- Publication number
- CN112379187B CN112379187B CN202010692233.8A CN202010692233A CN112379187B CN 112379187 B CN112379187 B CN 112379187B CN 202010692233 A CN202010692233 A CN 202010692233A CN 112379187 B CN112379187 B CN 112379187B
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- plate
- ceramic bearing
- hole
- wiper motor
- brake disc
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0425—Test clips, e.g. for IC's
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
Abstract
A loading device for an EMC test of a pneumatic wiper motor comprises a bottom plate and three plates which are sequentially arranged, wherein the three plates are detachably and fixedly connected to the bottom plate; the three plates are respectively a test piece mounting plate, a first supporting plate and a second supporting plate, and the test piece mounting plate, the first supporting plate and the second supporting plate are all provided with a through hole; a second ceramic bearing is arranged at the through hole on the first supporting plate, a first ceramic bearing is arranged at the through hole on the second supporting plate, and the transmission shaft is arranged at the inner hole of the second ceramic bearing and the inner hole of the first ceramic bearing; the transmission shaft is in clearance fit with the inner hole of the first ceramic bearing and the inner hole of the second ceramic bearing; the outer ring of the first ceramic bearing, the outer ring of the second ceramic bearing are in tight fit with the through hole on the first support plate and the through hole on the second support plate; the tested wiper motor is installed outside the test piece mounting plate through a screw, and an output shaft of the tested wiper motor penetrates through a through hole in the test piece mounting plate and is connected with the transmission shaft through the transition shaft and the elastic coupling. The invention can simulate the actual installation and use state of the wiper motor to be tested and accurately test the electromagnetic energy emitted by the wiper motor to be tested during the actual work.
Description
Technical Field
The invention is applied to electromagnetic compatibility (EMC) tests of automobile wiper motors, and particularly relates to a loading device for the EMC tests of the wiper motors.
Background
Because some fine components used in vehicles have complex structures, high processing precision and strict specification requirements of finished products, processing enterprises need to invest a large amount of production and detection costs when producing such products to ensure that the produced finished products can meet the relevant specification requirements.
The electromagnetic compatibility standard (GB18655-2018) stipulates that the test conditions of automobile electrical parts are simulated actual working states, loads need to be applied to tested pieces of motors such as wiper motors, glass lifters and the like during testing so as to test electromagnetic energy emitted by the motors during actual working, and the loads do not generate electromagnetic disturbance and can not become propagation carriers of the electromagnetic disturbance according to the electromagnetic compatibility testing principle.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the loading device for the EMC test of the pneumatic wiper motor, which has the advantages of stable structure and stable working state of the clamping device in the test process, can simulate the actual installation and use state of the tested wiper motor, and accurately test the electromagnetic energy emitted by the tested wiper motor in the actual working process.
The technical scheme of the invention is as follows: the three plates are detachably and fixedly connected to the bottom plate; the three plates are respectively a test piece mounting plate, a first supporting plate and a second supporting plate, and the test piece mounting plate, the first supporting plate and the second supporting plate are all provided with a through hole; the upper surface of the base plate is provided with a strip-shaped positioning key, the bottoms of the three plates which are sequentially arranged are provided with key grooves which are matched and assembled with the positioning key, and when the key grooves at the bottoms of the three plates which are sequentially arranged are matched and assembled with the positioning key on the upper surface of the base plate, the axes of the through hole on the test piece mounting plate, the through hole on the support plate I and the through hole on the support plate II are overlapped and are parallel to the positioning key; a second ceramic bearing is arranged at the through hole on the first supporting plate, a first ceramic bearing is arranged at the through hole on the second supporting plate, and the transmission shaft is arranged at the inner hole of the second ceramic bearing and the inner hole of the first ceramic bearing; the transmission shaft is in clearance fit with the inner hole of the first ceramic bearing and the inner hole of the second ceramic bearing; the outer ring of the first ceramic bearing, the outer ring of the second ceramic bearing and the through hole on the first support plate and the through hole on the second support plate are in tight fit; the tested wiper motor is arranged on the outer surface of the test piece mounting plate through a screw, and an output shaft of the tested wiper motor passes through a through hole on the test piece mounting plate and is connected with the transmission shaft through the transition shaft and the elastic coupling; the air inlet end of the clamping device is connected with the air outlet of the air pressure regulating valve through the first air pipe, the air pressure meter is integrated on the air pressure regulating valve, the second air pipe connected with the air source is connected with the air inlet of the air pressure regulating valve, the switch air valve is arranged on the second air pipe, and the air pressure regulating valve is arranged outside the second supporting plate.
The upper surface of the bottom plate is provided with a plurality of lower adjusting mounting holes, the periphery of the bottom of the test piece mounting plate is provided with at least two upper mounting holes, when the test piece mounting plate moves to be fixed along the positioning key, the upper mounting holes and the lower adjusting mounting holes form a safe mounting hole, and the test piece mounting plate is fixed on the bottom plate through bolts arranged at the mounting holes. The lengths of the output shafts of the tested wiper motors are inconsistent, an adjusting room is left to expand the application range, and the first support plate and the second support plate are used for positioning the axes of the transmission shafts.
The test piece mounting plate, the first support plate and the second support plate are plates with the same structure.
The plate comprises a vertical plate part and a transverse plate part positioned below the vertical plate part.
The both sides angle radius angle above the riser portion, the horizontal plate portion is rectangular shaped plate, goes up the mounting hole and is four, goes up the mounting hole and sets up in each angle department of rectangular shaped plate for four.
The bottom plate and the plate are made of non-metal materials.
The transmission shaft can freely slide in the axial direction of the first ceramic bearing and the second ceramic bearing.
The clamping device comprises a clamping device body, an air channel is arranged in the clamping device body, an opening at one end of the clamping device body forms two clamping pieces, and a piston is arranged in each clamping piece;
when the pistons of the two clamping pieces act synchronously, namely the pistons of the two clamping pieces simultaneously extend out relatively to contact with the side face of the brake disc, the distance A between the left side face of the brake disc and the left clamping piece = the distance B between the right side face of the brake disc and the right clamping piece;
when the piston of the right clamping piece extends out first and the piston of the left clamping piece extends out later, the distance A between the left side surface of the brake disc and the left clamping piece is smaller than the distance B between the right side surface of the brake disc and the right clamping piece, and the transmission shaft slides leftwards along the axial direction of the ceramic bearing I and the ceramic bearing II;
the piston of the left clamping piece extends out first, the piston of the right clamping piece extends out later, the distance A between the left side face of the brake disc and the left clamping piece is larger than the distance B between the right side face of the brake disc and the right clamping piece, and the transmission shaft slides rightwards along the axial direction of the first ceramic bearing and the second ceramic bearing.
The tested wiper motor can be arranged on the test piece mounting plate at any position of 360 degrees around the axis of the output shaft.
The test method has the advantages that electromagnetic noise is not generated in the test process, the short metal wire is connected to the ground at the position where metal materials cannot be used, reflection and conduction paths of the electromagnetic noise generated by the wiper motor to be tested are blocked, and the optimal test effect is achieved.
The vertical test piece mounting plate can simulate that the wiper motor to be tested can be mounted at any position of 360 degrees around the axis of the output shaft. The installation positions and the states of the tested wiper motors of different test samples are different when the tested wiper motors are applied to loading, and are determined by the factors of the structures and the materials of the samples, the electromagnetic fields emitted by the tested wiper motors when the tested wiper motors work are different in all directions around the tested wiper motors, and the arrangement of the electromagnetic radiation test simulates the actual installation and use states as much as possible, so that the electromagnetic radiation energy weight of the tested wiper motors in the whole vehicle can be more accurately analyzed according to the test results of parts.
The main body of the invention is made of non-metallic materials such as nylon, ceramics, glass, organic glass plastics, rubber and the like, a pure mechanical structure is not electrically driven, and the device does not have electromagnetic emission, so that the electromagnetic noise is not generated in the testing process, the short metal wire is connected to ground at the position where the metal material cannot be used, the reflection and the conduction path of the electromagnetic noise generated by the tested motor are blocked, and the optimal testing effect is achieved.
The invention has stable work, convenient installation and operation, precise control and air pressure control, and can realize stepless pressure regulation in a working range, thereby achieving the result of stepless regulation of load force. The invention provides auxiliary equipment for testing the electromagnetic radiation of the motor and a load device for testing the electromagnetic compatibility of the motor. The invention is pneumatic loading, can dynamically, continuously and steplessly adjust in a working range, and is simple to operate. Compared with the friction disk which is in single-side contact and single-side stress, the friction disk has the advantages that the double-side clamping stress is uniform, the operation is stable, in addition, the difference of sample pieces is considered, and the universality is strong.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a front view of FIG. 2;
fig. 4 is a schematic view of the brake disc 6 sliding leftwards on the transmission shaft 18 and being matched with the clamping device 7;
fig. 5 is a schematic view of the brake disc 6 sliding rightwards by the transmission shaft 18 to be matched with the clamping device 7.
Detailed Description
In the figures 1-5, the invention is composed of a bottom plate 1, a wiper motor 2 to be tested, a test piece mounting plate 3, a first supporting plate 4, a second supporting plate 5, a brake disc 6, a clamp 7, an air pressure regulating valve 8, an air pressure gauge 9, an air pipe 10, an elastic coupling 11, a first ceramic bearing 12, a second ceramic bearing 13, a transition shaft 14, a positioning key 15, a switch air valve 16 and a bolt 17. The elastic coupling 11 reduces the start impact of the test motor.
The first support plate 4, the second support plate 5 and the test piece mounting plate 3 are consistent in overall dimension, the first support plate 4, the second support plate 5 and the test piece mounting plate 3 are all mounted on the bottom plate 1 through bolts 17, the mutual position accuracy of the first support plate 4, the second support plate 5 and the bottom plate 1 is guaranteed through positioning keys 15, the distance between the first support plate 4 and the test piece mounting plate 3 is adjustable, the first support plate 4, the second support plate 5 and the test piece mounting plate 3 are fixed through bolts after manual adjustment along the length direction of the positioning keys 15, through holes with the diameter of 47mm are formed in the first support plate 4 and the second support plate 5, a first ceramic bearing 12 and a second ceramic bearing 13 are mounted in the through holes with the diameter of 47mm in the first support plate 4 and the second support plate 5, a transmission shaft 18 is mounted in the first ceramic bearing 12 and the second ceramic bearing 13, a brake disc 6 is arranged in the middle of the transmission shaft 18, the transmission shaft 18 and the brake disc 6 are coaxial, and can freely rotate around the axis of the transmission shaft 18 without resistance, and a certain play allowance is designed in the axial direction, the transmission shaft 18 is in clearance fit with the first ceramic bearing 12 and the second ceramic bearing 13, the transmission shaft 18 can freely slide along the axial directions of the first ceramic bearing 12 and the second ceramic bearing 13, the sliding range is a gap between the opening of the clamping device 7 in a non-pressure state and the brake disc 6, and the uniform stress on the two sides of the brake disc 6 is ensured.
The clamping device 7 comprises a clamping device body, an air channel is arranged in the clamping device body, one end of the clamping device body is opened to form two clamping pieces, and a piston is arranged in each clamping piece.
Normally, the pistons of the two clamping pieces act synchronously, that is, in the process that the pistons of the two clamping pieces simultaneously extend out and contact with the side face of the brake disc 6, the distance a between the left side face of the brake disc 6 and the left clamping piece = the distance B between the right side face of the brake disc and the right clamping piece (see fig. 3).
When the piston actions of the two clamping pieces are asynchronous, under the cooperation of the elastic coupling 11:
the piston of the right clamping piece extends out firstly, the piston of the left clamping piece extends out, the distance A between the left side surface of the brake disc 6 and the left clamping piece is smaller than the distance B between the right side surface of the brake disc and the right clamping piece (as shown in figure 4), and the transmission shaft 18 axially slides leftwards along the first ceramic bearing 12 and the second ceramic bearing 13, so that the two surfaces of the brake disc 6 are uniformly stressed, the brake disc 6 is stable in resistance, the repeatability is optimal, and an optimal scheme is provided for test comparison and correction comparison.
The piston of the left clamping piece extends out first, the piston of the right clamping piece extends out later, the distance A between the left side surface of the brake disc 6 and the left clamping piece is larger than the distance B between the right side surface of the brake disc and the right clamping piece (as shown in figure 5), and the transmission shaft 18 axially slides rightwards along the first ceramic bearing 12 and the second ceramic bearing 13, so that the two sides of the brake disc 6 are uniformly stressed, the brake disc 6 is stable in resistance, the repeatability is optimal, and an optimal scheme is provided for test comparison and correction comparison.
The clamper 7 is arranged between the first support plate 4 and the second support plate 5 and fixed on the inner side surface of the support plate 4 or the support plate 5, the opening part of the clamper 7 covers the brake disc 6, the clamper 7 is pneumatically controlled, the air inlet end is connected with an air pressure regulating valve 8, an air pressure gauge 9 and a switch air valve 16 through an air pipe I10, the clamper 7, the air pipe I10, the air pressure regulating valve 8, an air pipe II and the switch air valve 16 are sequentially connected, the air pressure gauge 9 is integrated on the air pressure regulating valve 8, the air inlet end of the clamper 7 is ventilated and reaches certain air pressure, a piston with a friction plate in the clamper overcomes the tension of a built-in spring and extends out from two ends to the middle until the friction plates at two sides simultaneously contact with two side surfaces of the brake disc 6, the friction plate can clamp the brake disc 6 under the action of clamping force to prevent the brake disc from rotating, the magnitude of the resistance depends on the magnitude of the clamping force, and the magnitude of the clamping force depends on the air pressure, the air pressure can be adjusted through the air pressure valve 8, the on-off of the air path is controlled by the switch air valve 16, the air pressure adjusting valve 8 is operated by a manual knob, the switch air valve 16 is also operated by a manual operation to only switch on and off the two-gear barometer 9 to display as a resistance value, and the pair relation between the resistance value and the air pressure value is measured in a test mode.
The tested wiper motor 2 is installed on the mounting plate 3 through a screw, the output shaft of the motor penetrates through a through hole with the diameter of 47mm formed in the mounting plate 3 and is connected with the transmission shaft 18 through the transition shaft 14 and the elastic coupling 11, and the brake disc 6 is coaxially installed in the middle of the transmission shaft 18. An outer hexagonal nut needs to be screwed down at the output shaft end of the motor, and the nut is embedded into an inner hexagonal hole with the same size of the transition shaft 14.
During the test, the power of the wiper motor 2 to be tested is switched on, so that the power of the wiper motor 2 to be tested is output to the transmission shaft 18 through the transition shaft 14 and the elastic coupling 11, and the brake disc 6 is driven to rotate synchronously, at the moment, the wiper motor 12 to be tested is in an idle state, when the switch air valve 16 is opened, the air pressure in the inner cavity of the clamp 7 is increased through the air pipe 10 and the air pressure regulating valve 8, the inner piston is ejected out, the inner piston is contacted with the two sides of the brake disc 6 after the idle stroke, the piston is not contacted with the brake disc within a distance of several millimeters in the extending process, namely the idle stroke, the piston and the side of the brake disc 6 generate friction force, the clamping force is generated, the wiper motor 2 to be tested is in a loading state, the air pressure regulating valve 8 is regulated to increase the air pressure, the clamping force is correspondingly increased, and the load of the wiper motor 2 to be tested is increased. The air pressure value on the dial of the air pressure regulating valve 8 is 0-20%, 20-40%, 40-60%, 60-80% and 80-100%.
Claims (8)
1. The utility model provides a loading device is used in pneumatic windscreen wiper motor EMC experiment which characterized in that: the three plates are detachably and fixedly connected to the bottom plate (1); the three plates are respectively a test piece mounting plate (3), a first support plate (4) and a second support plate (5), and the test piece mounting plate (3), the first support plate (4) and the second support plate (5) are all provided with a through hole;
a strip-shaped positioning key (15) is arranged on the bottom plate (1), key grooves matched with the positioning key (15) are formed in the bottoms of the three plates which are sequentially arranged, and when the key grooves in the bottoms of the three plates which are sequentially arranged are matched and assembled with the positioning key (15) on the bottom plate (1), the axes of the through hole in the test piece mounting plate (3), the through hole in the support plate I (4) and the through hole in the support plate II (5) are overlapped and parallel to the positioning key (15); a second ceramic bearing (13) is arranged at a through hole on the first supporting plate (4), a first ceramic bearing (12) is arranged at a through hole on the second supporting plate (5), and a transmission shaft (18) is arranged at an inner hole of the second ceramic bearing (13) and an inner hole of the first ceramic bearing (12); the transmission shaft (18) is in clearance fit with the inner hole of the first ceramic bearing (12) and the inner hole of the second ceramic bearing (13); the outer ring of the first ceramic bearing (12), the outer ring of the second ceramic bearing (13), the through hole in the first support plate (4) and the through hole in the second support plate (5) are in tight fit;
the tested wiper motor (2) is arranged on the outer surface of the test piece mounting plate (3) through a screw, and an output shaft of the tested wiper motor (2) passes through a through hole on the test piece mounting plate (3) and is connected with a transmission shaft (18) through a transition shaft (14) and an elastic coupling (11); the air inlet end of the clamp (7) is connected with the air outlet of the air pressure regulating valve (8) through an air pipe I (10), an air pressure meter (9) is integrated on the air pressure regulating valve (8), an air pipe II connected with an air source is connected with the air inlet of the air pressure regulating valve (8), a switch air valve (16) is arranged on the air pipe II, and the air pressure regulating valve (8) is arranged outside the support plate II (5);
a brake disc (6) is arranged in the middle of the transmission shaft (18), the transmission shaft (18) and the brake disc (6) are coaxial, the brake disc (6) which is installed in place can freely rotate around the axis of the transmission shaft (18) without resistance, a certain play allowance is designed in the axial direction, the transmission shaft (18) is in clearance fit with the ceramic bearing I (12) and the ceramic bearing II (13), the transmission shaft (18) can freely slide along the axial directions of the ceramic bearing I (12) and the ceramic bearing II (13), the sliding range is a gap between the opening of the clamp (7) and the brake disc (6) in a non-pressure state, and the two sides of the brake disc (6) are uniformly stressed;
the wiper motor (2) to be tested can be arranged on the test piece mounting plate (3) at any position of 360 degrees around the axis of the output shaft;
the arrangement of the installation position of the tested wiper motor in the electromagnetic radiation test simulates the actual installation and use state.
2. The pneumatic wiper motor EMC of claim 1 loading device for experiment, characterized in that: the test piece mounting plate is characterized in that a plurality of lower adjusting mounting holes are formed in the bottom plate (1), at least two upper mounting holes are formed in the periphery of the bottom of the test piece mounting plate (3), when the test piece mounting plate (3) moves to be fixed along the positioning key (15), the upper mounting holes and the lower adjusting mounting holes form a fixed mounting hole, and the test piece mounting plate (3) is fixed to the top of the bottom plate (1) through bolts (17) arranged at the mounting holes.
3. The pneumatic wiper motor EMC of claim 2 is loading device for experiment, characterized in that: the test piece mounting plate (3), the first support plate (4) and the second support plate (5) are plates with the same structure.
4. The pneumatic wiper motor EMC of claim 3 is loading device for experiment, characterized in that: the plate comprises a vertical plate part and a transverse plate part positioned below the vertical plate part.
5. The pneumatic wiper motor EMC of claim 4 is loading device for experiment, characterized in that: the both sides angle radius angle above the riser portion, the horizontal plate portion is rectangular shaped plate, goes up the mounting hole and is four, goes up the mounting hole and sets up in each angle department of rectangular shaped plate for four.
6. The pneumatic wiper motor EMC of claim 1 loading device for experiment, characterized in that: the bottom plate (1) and the plate are made of non-metal materials.
7. The pneumatic wiper motor EMC of claim 1 loading device for experiment, characterized in that: the transmission shaft (18) can freely slide in the axial directions of the first ceramic bearing (12) and the second ceramic bearing (13).
8. The pneumatic wiper motor EMC of claim 1 loading device for experiment, characterized in that: the clamping device (7) comprises a clamping device body, an air passage is arranged in the clamping device body, one end of the clamping device body is opened to form two clamping pieces, and a piston is arranged in each clamping piece;
when the pistons of the two clamping pieces act synchronously, namely, the pistons of the two clamping pieces simultaneously extend out relatively to contact with the side face of the clamping brake disc (6), the distance A between the left side face of the brake disc (6) and the left clamping piece = the distance B between the right side face of the brake disc and the right clamping piece;
when the piston of the right clamping piece extends out firstly and the piston of the left clamping piece extends out later, the distance A between the left side surface of the brake disc (6) and the left clamping piece is less than the distance B between the right side surface of the brake disc and the right clamping piece, and the transmission shaft (18) slides leftwards along the axial direction of the ceramic bearing I (12) and the ceramic bearing II (13);
the piston of the left clamping piece extends out first, the piston of the right clamping piece extends out later, the distance A between the left side surface of the brake disc (6) and the left clamping piece is larger than the distance B between the right side surface of the brake disc and the right clamping piece, and the transmission shaft (18) axially slides rightwards along the ceramic bearing I (12) and the ceramic bearing II (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692233.8A CN112379187B (en) | 2020-07-17 | 2020-07-17 | Loading device for EMC test of pneumatic wiper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010692233.8A CN112379187B (en) | 2020-07-17 | 2020-07-17 | Loading device for EMC test of pneumatic wiper motor |
Publications (2)
| Publication Number | Publication Date |
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| CN112379187A CN112379187A (en) | 2021-02-19 |
| CN112379187B true CN112379187B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010692233.8A Active CN112379187B (en) | 2020-07-17 | 2020-07-17 | Loading device for EMC test of pneumatic wiper motor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075544A (en) * | 2021-03-09 | 2021-07-06 | 一汽奔腾轿车有限公司 | Torsion load device and method for electromagnetic compatibility test of automobile wiper motor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110078589A (en) * | 2009-12-31 | 2011-07-07 | 주식회사 웰탑테크노스 | A shaft inputer for wiper moter shaft tester |
| CN202914590U (en) * | 2012-11-12 | 2013-05-01 | 杭州伊诺斐机电有限公司 | Motor pneumatic braking machine |
| CN203422455U (en) * | 2013-08-23 | 2014-02-05 | 襄阳达安汽车检测中心 | Wiper motor load testing device for EMC experiment |
| CN204241653U (en) * | 2014-12-12 | 2015-04-01 | 襄阳达安汽车检测中心 | Rain shaving electrical machine load device is used in a kind of EMC test |
| CN105182236A (en) * | 2015-09-18 | 2015-12-23 | 卓越（苏州）自动化设备有限公司 | Device for detecting the performance of a wiper motor of passenger vehicle |
| CN105629170B (en) * | 2015-12-30 | 2019-01-01 | 广州广电计量检测股份有限公司 | A kind of electromagnetic compatibility motor loading test device |
| CN205559647U (en) * | 2016-04-11 | 2016-09-07 | 宁波市福路德汽车科技发展有限公司 | Cantilever type brake disc friction disc device |
| CN205720578U (en) * | 2016-04-19 | 2016-11-23 | 成都华川电装有限责任公司 | The load simulating device of rain shaving electrical machine electromagnetic compatibility detection |
| CN206038861U (en) * | 2016-09-09 | 2017-03-22 | 华域汽车电动系统有限公司 | Electro magnetic compatibility test of electric vehicle motor system device |
| CN111024605A (en) * | 2019-12-31 | 2020-04-17 | 太原科技大学 | Stepless pressure regulating friction coefficient measuring instrument |
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2020
- 2020-07-17 CN CN202010692233.8A patent/CN112379187B/en active Active
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