CN113447812B - DC motor testing device - Google Patents
DC motor testing device Download PDFInfo
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- CN113447812B CN113447812B CN202010218794.4A CN202010218794A CN113447812B CN 113447812 B CN113447812 B CN 113447812B CN 202010218794 A CN202010218794 A CN 202010218794A CN 113447812 B CN113447812 B CN 113447812B
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- 238000012360 testing method Methods 0.000 title claims abstract description 87
- 230000006698 induction Effects 0.000 claims description 33
- 230000005540 biological transmission Effects 0.000 claims description 23
- 238000003825 pressing Methods 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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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
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
Abstract
The invention discloses a direct current motor testing device, and relates to the technical field of testing devices; the motor steering test device comprises a steering test mechanism for testing the steering of a motor, a low-voltage power supply mechanism for low-voltage test of the motor, a high-voltage power supply mechanism for high-voltage test of the motor and a high-low voltage switching mechanism; the high-low voltage switching mechanism comprises a first bracket, a second bracket, a high-voltage wiring column, a low-voltage wiring column, a sliding block, a switching wiring column and a sliding mechanism, wherein the first bracket and the second bracket are oppositely arranged, the high-voltage wiring column is positioned on the first bracket, the low-voltage wiring column is positioned on the second bracket, the sliding block is positioned between the first bracket and the second bracket, the switching wiring column is positioned on the sliding block, the sliding mechanism is used for sliding the sliding block, the high-voltage wiring column is connected with a high-voltage power supply mechanism, the low-voltage wiring column is connected with a low-voltage power supply mechanism, the switching wiring column is connected with a motor, and the switching wiring column is in butt joint with the high-voltage wiring column or the low-voltage wiring column. The invention has the characteristic of high efficiency; the sliding mechanism can adopt the prior art such as a cylinder.
Description
Technical Field
The invention belongs to the technical field of testing devices, and particularly relates to a direct current motor testing device.
Background
Before leaving the factory, the brush direct current motor needs to be subjected to high-voltage and low-voltage testing and steering testing.
In the prior art, motors are often placed in a high-low voltage testing mechanism and a steering testing mechanism respectively for testing, and the efficiency is very low.
Disclosure of Invention
The invention aims to overcome the defect of low test efficiency in the prior art, and provides a direct current motor test device which can perform high-low voltage test and steering test and has high test efficiency.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a direct current motor testing device comprises a steering testing mechanism for testing the steering of a motor, a low-voltage power supply mechanism for low-voltage testing of the motor, a high-voltage power supply mechanism for high-voltage testing of the motor and a high-low voltage switching mechanism; the high-low voltage switching mechanism comprises a first bracket, a second bracket, a high-voltage wiring column, a low-voltage wiring column, a sliding block, a switching wiring column and a sliding mechanism, wherein the first bracket and the second bracket are oppositely arranged, the high-voltage wiring column is positioned on the first bracket, the low-voltage wiring column is positioned on the second bracket, the sliding block is positioned between the first bracket and the second bracket, the switching wiring column is positioned on the sliding block, the sliding mechanism is used for sliding the sliding block, the high-voltage wiring column is connected with a high-voltage power supply mechanism, the low-voltage wiring column is connected with a low-voltage power supply mechanism, the switching wiring column is connected with a motor, and the switching wiring column is in butt joint with the high-voltage wiring column or the low-voltage wiring column. When the test is performed, the motor is fixed, then the low-voltage test is performed, the motor rotates when the low-voltage test is performed, the steering of the motor is judged by using the steering test mechanism, and when the low-voltage test and the steering test are performed, the high-low voltage switching mechanism operates to perform the high-voltage test; the invention has the characteristic of high efficiency; the sliding mechanism can adopt the prior art such as a cylinder.
Preferably, the steering test mechanism is connected with a lifting mechanism for driving the steering test mechanism to lift, and the steering test mechanism comprises a fixed base for fixing a motor, a transmission rod coaxial with an output shaft of the motor and used for extruding the output shaft, a spring for applying pressure to the transmission rod towards the output shaft, a driving induction plate positioned at the top end of the transmission rod, baffles positioned on two opposite sides of the driving induction plate, photoelectric switches positioned on the baffles and used for inducing the driving induction plate, and a rotating mechanism for rotating the driving induction plate, wherein the baffles are positioned in the rotating radius of the driving induction plate. The structure is simple.
Preferably, the rotating mechanism comprises a supporting plate, a deflector rod with two ends hinged on the supporting plate, sliding grooves positioned at the ends of the deflector rod, driving blocks positioned between the deflector rods, protruding blocks which are connected in the sliding grooves in a sliding manner and fixedly connected on the driving blocks, and an air cylinder for moving the driving blocks so as to realize the rotation of the deflector rod; the driving induction plate is fixedly connected with a vertical rod positioned between the deflector rods. The trend that the lug removed is the straight line, and this straight line all is located between the driving lever pin joint with the spout, and when the lug moved towards the driving lever, the lug was slided in the spout, and the spout rotated simultaneously, and two driving levers open, can turn to the test this moment, and vertical pole can not receive the interference of driving lever when the rotation under the drive induction board effect. After the steering test is finished, the convex blocks move away from the deflector rod, the deflector rod can be clamped together, at the moment, the deflector rod can stir the vertical rod to the middle position of the baffles at the two sides, and at the moment, the vertical rod is not sensed by the photoelectric switches on the baffles at the two sides, and the next steering test is waited.
Preferably, the transmission rod is sleeved with a bearing, the spring is sleeved at the upper end of the transmission rod, one end of the spring is connected to the bearing, and the other end of the spring is connected to the driving induction plate. The bearing is used for supporting the spring and is convenient for the transmission rod to rotate.
Preferably, the number of the high-voltage wiring columns, the low-voltage wiring columns and the switching wiring columns is two, one end of each switching wiring column corresponds to one of the high-voltage wiring columns, and the other end of each switching wiring column corresponds to one of the low-voltage wiring columns. The structure is simple.
Preferably, the lifting mechanism comprises a lifting block fixedly connected with the steering test mechanism, a screw rod in threaded connection with the lifting block, and a rotating motor for driving the screw rod to rotate. The structure is simple.
Preferably, the steering test mechanism is connected with a second lifting mechanism for driving the steering test mechanism to lift, and the steering test mechanism comprises a bottom plate, a hole positioned on the bottom plate, a round cover plate covered on the upper side of the hole, an annular groove positioned on the upper side of the bottom plate, a second spring positioned in the groove, a rotating plate which is rotationally connected on the lower side of the cover plate and is coaxial with the cover plate, a friction layer positioned on the lower side of the rotating plate, a second groove positioned at the center of the lower side of the rotating plate, a guide slope positioned at the edge of the second groove and used for guiding an output shaft of a motor to the center of the cover plate, a limit groove positioned on the upper side of the bottom plate, a plurality of sensors positioned on the inner side wall of the limit groove and used for sensing the cover plate, a second guide slope positioned at the notch of the limit groove and used for guiding the cover plate into the limit groove, a rotating shaft fixedly connected to the center of the upper side of the rotating plate, a second driving sensing plate fixedly connected to the top end of the rotating shaft, a second baffle positioned on two opposite sides of the second driving sensing plate and a pressure sensor positioned on the second baffle and used for sensing the second driving sensing plate; the rotating shaft penetrates through the cover plate, the second baffle is located in the rotating radius of the second driving induction plate, the cover plate is located in the limiting groove, one end of the second spring is connected to the bottom of the groove, and the other end of the second spring is connected to the lower side of the cover plate; the inductors are uniformly arranged along the circumferential direction of the limit groove; and a second fixed base used for fixing the motor is arranged below the steering test mechanism. The universality is better; the output shaft and the rotating shaft do not need to be aligned accurately.
The beneficial effects of the invention are as follows: the invention provides a direct current motor testing device which can perform high-low voltage testing and steering testing and has high testing efficiency; the universality is good; the structure is simple.
Drawings
FIG. 1 is a schematic illustration of the present invention;
FIG. 2 is a top view of the high-low voltage switching mechanism;
FIG. 3 is an enlarged view at A of FIG. 1;
FIG. 4 is a schematic view of a rotating mechanism of embodiment 1;
FIG. 5 is a top view of the rotary mechanism of embodiment 1;
fig. 6 is a sectional view of the rotating mechanism of embodiment 1;
FIG. 7 is a schematic illustration of the lever after opening;
FIG. 8 is a schematic view of a rotating mechanism of embodiment 2;
FIG. 9 is a schematic view when the output shaft is offset from the shaft by a large amount;
FIG. 10 is a schematic view of the output shaft with less offset from the shaft so that the top end of the output shaft rests on the guide ramp;
fig. 11 is a schematic view of the upper end of the output shaft resting against the bottom of the second groove under the influence of the guiding ramp.
In the figure: the motor 1, the first bracket 2, the high-voltage wiring column 3, the high-voltage wiring column 4, the sliding block 5, the switching wiring column 6, the fixed base 7, the output shaft 8, the spring 9, the driving induction plate 10, the baffle 11, the photoelectric switch 12, the vertical rod 13, the supporting plate 14, the deflector rod 15, the sliding chute 16, the driving block 17, the convex block 18, the air cylinder 19, the lifting block 20, the screw 21, the bearing 22, the bottom plate 23, the hole 24, the cover plate 25, the groove 26, the second spring 27, the friction layer 28, the second groove 29, the guide slope 30, the limit groove 31, the rotating plate 32, the rotating shaft 33, the second driving induction plate 34, the second baffle 35, the transmission rod 36, the pressure sensor 37, the second guide slope 38, the inductor 39 and the second bracket 40.
Detailed Description
The invention is further described in detail below with reference to the attached drawings and detailed description:
example 1:
referring to fig. 1 to 7, a direct current motor testing device comprises a steering testing mechanism for testing the steering of a motor 1, a low-voltage power supply mechanism for testing the low voltage of the motor 1, a high-voltage power supply mechanism for testing the high voltage of the motor 1, and a high-low voltage switching mechanism; the high-low voltage switching mechanism comprises a first bracket 2, a second bracket 40, a high-voltage wiring column 3, a low-voltage wiring column 4, a sliding block 5, a switching wiring column 6 and a sliding mechanism, wherein the first bracket 2 and the second bracket 40, the high-voltage wiring column 3, the low-voltage wiring column 4, the sliding block 5, the switching wiring column 6 and the sliding mechanism are arranged on the first bracket 2 and the second bracket 40 in a relative mode, the high-voltage wiring column 3 is connected with a high-voltage power supply mechanism, the low-voltage wiring column 4 is connected with the low-voltage power supply mechanism, the switching wiring column 6 is connected with the motor 1, and the switching wiring column 6 is in butt joint with the high-voltage wiring column 3 or the low-voltage wiring column 4; the number of the high-voltage wiring columns 3, the low-voltage wiring columns 4 and the switching wiring columns 6 is two, one end of each switching wiring column 6 corresponds to one of the high-voltage wiring columns 3, and the other end of each switching wiring column 6 corresponds to one of the low-voltage wiring columns 4;
the steering test mechanism is connected with a lifting mechanism for driving the steering test mechanism to lift, and the lifting mechanism comprises a lifting block 20 fixedly connected with the steering test mechanism, a screw 21 in threaded connection with the lifting block 20 and a rotating motor for driving the screw 21 to rotate; the steering test mechanism comprises a fixed base 7 for fixing the motor 1, a transmission rod 36 coaxial with an output shaft 8 of the motor 1 and used for extruding the output shaft 8, a spring 9 for applying pressure to the transmission rod 36 towards the output shaft 8, a driving induction plate 10 positioned at the top end of the transmission rod 36, baffle plates 11 positioned at two opposite sides of the driving induction plate 10, photoelectric switches 12 positioned on the baffle plates 11 and used for inducting the driving induction plate 10, and a rotating mechanism used for rotating the driving induction plate 10, wherein the baffle plates 11 are positioned in the rotating radius of the driving induction plate 10.
The rotating mechanism comprises a supporting plate 14, a deflector rod 15 with two ends hinged on the supporting plate 14, a chute 16 positioned at the ends of the deflector rod 15, a driving block 17 positioned between the deflector rods 15, a lug 18 which is connected in the chute 16 in a sliding way and fixedly connected on the driving block 17, and an air cylinder 19 for moving the driving block 17 so as to realize the rotation of the deflector rod 15; a vertical rod 13 positioned between the deflector rods 15 is fixedly connected to the driving induction plate 10; the transmission rod 36 is sleeved with a bearing 22, the spring 9 is sleeved at the upper end of the transmission rod 36, one end of the spring 9 is connected to the bearing 22, and the other end of the spring 9 is connected to the driving induction plate 10.
Principles of the embodiment:
when the low-voltage power supply device is used, the motor 1 is fixed on the fixed base 7, then the switching binding posts 6 are abutted to the low-voltage binding posts 4, two poles of the motor 1 are respectively connected with the two switching binding posts 6, the low-voltage binding posts 4 are connected with two poles of the low-voltage power supply mechanism, and at the moment, the low-voltage power supply mechanism is connected with the motor 1 to perform low-voltage test.
After the low-voltage test is finished, the rotating motor is operated, the screw 21 is rotated, the lifting block 20 is lowered, the lower end of the transmission rod 36 is abutted against the output shaft 8 of the motor 1, the transmission rod 36 and the bearing 22 are relatively displaced, the spring 9 is slightly lengthened, so that proper pressure exists between the transmission rod 36 and the output shaft 8, at the moment, the motor 1 is operated, the transmission rod 36 is also rotated under the action of friction force to drive the induction plates 10 to rotate, the number of the baffles 11 is two, the induction plates 10 are finally rotated to one baffle 11, at the moment, the corresponding photoelectric switch 12 is blocked by the induction plates 10, a trigger signal is given to a computer, and the rotating direction of the motor 1 is judged according to the baffles 11 abutted against the induction plates 10; thereby, the correctness of the rotation direction of the motor 1 can be judged.
And then performing high-voltage test, moving the sliding block under the action of the sliding mechanism, abutting the switching binding post with the high-voltage binding post, connecting the high-voltage binding post with two poles of the high-voltage power supply mechanism, and communicating the motor with the high-voltage power supply mechanism at the moment to perform the high-voltage power supply mechanism.
And after the high-low voltage test and the steering test are finished, the motor is taken down.
Example 2:
referring to fig. 8 to 11, a direct current motor testing device includes a steering testing mechanism for testing the steering of a motor 1, a low voltage power supply mechanism for low voltage testing of the motor 1, a high voltage power supply mechanism for high voltage testing of the motor 1, and a high and low voltage switching mechanism; the high-low voltage switching mechanism comprises a first bracket 2, a second bracket 40, a high-voltage wiring column 3, a low-voltage wiring column 4, a sliding block 5, a switching wiring column 6 and a sliding mechanism, wherein the first bracket 2 and the second bracket 40, the high-voltage wiring column 3, the low-voltage wiring column 4, the sliding block 5, the switching wiring column 6 and the sliding mechanism are arranged on the first bracket 2 and the second bracket 40 in a relative mode, the high-voltage wiring column 3 is connected with a high-voltage power supply mechanism, the low-voltage wiring column 4 is connected with the low-voltage power supply mechanism, the switching wiring column 6 is connected with the motor 1, and the switching wiring column 6 is in butt joint with the high-voltage wiring column 3 or the low-voltage wiring column 4; the number of the high-voltage wiring columns 3, the low-voltage wiring columns 4 and the switching wiring columns 6 is two, one end of each switching wiring column 6 corresponds to one of the high-voltage wiring columns 3, and the other end of each switching wiring column 6 corresponds to one of the low-voltage wiring columns 4;
the steering test mechanism comprises a bottom plate 23, a hole 24 positioned on the bottom plate 23, a round cover plate 25 covered on the upper side of the hole 24, a ring-shaped groove 26 positioned on the upper side of the bottom plate 23, a second spring 27 positioned in the groove 26, a rotating plate 32 rotatably connected on the lower side of the cover plate 25 and coaxial with the cover plate 25, a friction layer 28 positioned on the lower side of the rotating plate 32, a second groove 29 positioned at the center of the lower side of the rotating plate 32, a guide slope 30 positioned at the edge of the second groove 29 and used for guiding an output shaft 8 of the motor 1 to the center of the cover plate 25, a limit groove 31 positioned on the upper side of the bottom plate 23, a plurality of sensors 39 positioned on the inner side wall of the limit groove 31 and used for sensing the cover plate 25, a second guide slope 38 positioned at the notch of the limit groove 31 and used for guiding the cover plate 25 into the limit groove 31, a rotating shaft 33 fixedly connected on the center of the upper side of the rotating plate 32, a second driving sensor plate 34 fixedly connected on the top of the rotating shaft 33, a second baffle 35 positioned on the opposite sides of the second driving sensor plate 34, and a second sensor 37 positioned on the second baffle 35 and used for driving the second sensor 34; the rotating shaft 33 passes through the cover plate 25, the second baffle 35 is positioned in the rotating radius of the second driving induction plate 34, the cover plate 25 is positioned in the limit groove 31, one end of the second spring 27 is connected to the bottom of the groove 26, and the other end of the second spring 27 is connected to the lower side of the cover plate 25; the sensors 39 are uniformly arranged along the circumferential direction of the limit groove 31; a second fixed base used for fixing the motor 1 is arranged below the steering test mechanism.
Principles of the embodiment:
this example was modified from example 1; in embodiment 1, the transmission rod 36 must be accurately abutted with the output shaft 8 of the motor 1 to drive the transmission rod 36 to rotate; the positioning requirements for the motor 1 are high.
In this embodiment, the motor 1 is fixed on the second fixed base, the area of the hole 24 is larger, the second lifting mechanism drives the bottom plate 23 to descend, if the deviation between the output shaft 8 and the rotating shaft 33 is larger at this moment, the output shaft 8 will jack up one side of the bottom plate 23, one end of the bottom plate 23 is tilted (as shown in fig. 9), at this moment, one side of the upper end of the output shaft 8 is abutted against the friction layer 28, one side of the inductor 39 is disengaged from the bottom plate 23, the other side of the inductor still senses the bottom plate 23, at this moment, the motor 1 rotates to drive the rotating plate 32 to rotate, the direction of rotation of the output shaft of the motor is opposite to the direction of rotation of the rotating plate, the rotating shaft 33 is driven to rotate to drive the second driving induction plate 34 to rotate, the second driving induction plate 34 abuts against the pressure sensor 37 of the second baffle 35 at one side of the second driving induction plate after rotation, when the pressure sensor 37 presses, the motor stops running, at this moment, the second baffle 35 is rotated to the second baffle 35 is rotated clockwise, the direction of rotation of the rotating shaft 33 is the second baffle 35, and the second driving plate is rotated to the counter-clockwise, and the rotating direction of the rotating plate is known by the computer 35; the second spring 27 serves on the one hand to press down the bottom plate during the above-mentioned process and on the other hand to ensure a sufficient friction between the rotor plate and the output shaft.
When the center of the output shaft coincides with the center of the rotating plate, the whole bottom plate moves upwards, each second spring is stretched, all the sensors are separated from the bottom plate, at this time, the rotating shaft 33 abuts against the bottom of the second groove 29, the rotating direction of the rotating shaft 33 is consistent with that of the rotating shaft 33, and the rotating direction of the rotating shaft 33 obtained by the computer is the rotating direction of the motor.
When the eccentricity of the output shaft and the rotating plate is smaller, the bottom plate is insufficient to enable one end of the bottom plate to tilt, at the moment, the bottom plate is lowered under the action of the second lifting mechanism, at the moment, the top end of the output shaft is abutted against the guide slope 30, the bottom plate moves upwards, when the bottom plate leaves the limit groove 31, the bottom plate is deflected under the action of the guide slope 30, finally, the end part of the output shaft reaches the bottom of the second groove 29, the bottom of the second groove 29 is matched with the output shaft, the bottom plate is finally horizontal, at the moment, all sensors are disconnected with the bottom plate, and the rotating direction of the rotating shaft 33 obtained by a computer is the rotating direction of the motor; after the test, the second lifting mechanism is lifted, at this time, the bottom plate moves downward under the action of the second spring, and the bottom plate reenters the limit groove 31 under the action of the second guide slope 38.
In the test of this embodiment, the output shaft and the rotating shaft 33 do not need to be aligned precisely, and on the other hand, the motors of different models are also adapted, so that the universality is better.
Claims (6)
1. The direct current motor testing device is characterized by comprising a steering testing mechanism for testing the steering of a motor, a low-voltage power supply mechanism for low-voltage testing of the motor, a high-voltage power supply mechanism for high-voltage testing of the motor and a high-low voltage switching mechanism;
the high-low voltage switching mechanism comprises a first bracket, a second bracket, a high-voltage wiring column, a low-voltage wiring column, a sliding block, a switching wiring column and a sliding mechanism, wherein the first bracket and the second bracket are oppositely arranged;
the steering test mechanism comprises a fixed base for fixing a motor, a transmission rod coaxial with an output shaft of the motor and used for extruding the output shaft, a spring for applying pressure towards the output shaft to the transmission rod, a driving induction plate positioned at the top end of the transmission rod, baffles positioned on two opposite sides of the driving induction plate, photoelectric switches positioned on the baffles and used for inducing the driving induction plate, and a rotating mechanism used for rotating the driving induction plate.
2. The direct current motor testing device according to claim 1, wherein the rotating mechanism comprises a supporting plate, a deflector rod with two ends hinged on the supporting plate, a sliding groove positioned at the ends of the deflector rod, a driving block positioned between the deflector rods, a protruding block which is connected in the sliding groove in a sliding way and fixedly connected on the driving block, and a cylinder for moving the driving block so as to realize the rotation of the deflector rod; the driving induction plate is fixedly connected with a vertical rod positioned between the deflector rods.
3. The direct current motor testing device according to claim 1, wherein a bearing is sleeved on the transmission rod, the spring is sleeved at the upper end of the transmission rod, one end of the spring is connected to the bearing, and the other end of the spring is connected to the driving induction plate.
4. The direct current motor testing device according to claim 1, wherein the number of the high voltage wiring posts, the low voltage wiring posts and the switching wiring posts is two, one end of the switching wiring posts is in one-to-one correspondence with the high voltage wiring posts, and the other end of the switching wiring posts is in one-to-one correspondence with the low voltage wiring posts.
5. A direct current motor testing device according to claim 1, 2, 3 or 4, wherein the lifting mechanism comprises a lifting block fixedly connected with the steering testing mechanism, a screw rod in threaded connection with the lifting block, and a rotating motor for driving the screw rod to rotate.
6. The direct current motor testing device according to claim 1, wherein the steering testing mechanism is connected with a second lifting mechanism for driving the steering testing mechanism to lift, and the steering testing mechanism comprises a bottom plate, a hole positioned on the bottom plate, a round cover plate covered on the upper side of the hole, an annular groove positioned on the upper side of the bottom plate, a second spring positioned in the groove, a rotating plate which is rotatably connected on the lower side of the cover plate and is coaxial with the cover plate, a friction layer positioned on the lower side of the rotating plate, a second groove positioned at the center of the lower side of the rotating plate, a guide slope positioned at the edge of the second groove and used for guiding an output shaft of the motor to the center of the cover plate, a limit groove positioned on the upper side of the bottom plate, a plurality of sensors positioned on the inner side wall of the limit groove and used for sensing the cover plate, a second guide slope positioned at the notch of the limit groove and used for guiding the cover plate to the limit groove, a rotating shaft fixedly connected to the center of the upper side of the rotating plate, a second driving sensing plate fixedly connected to the top end of the rotating shaft, a second driving sensing plate positioned on two opposite sides of the second driving sensing plate and a pressure sensor positioned on the second sensing plate; the rotating shaft penetrates through the cover plate, the second baffle is located in the rotating radius of the second driving induction plate, the cover plate is located in the limiting groove, one end of the second spring is connected to the bottom of the groove, and the other end of the second spring is connected to the lower side of the cover plate; the inductors are uniformly arranged along the circumferential direction of the limit groove; and a second fixed base used for fixing the motor is arranged below the steering test mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218794.4A CN113447812B (en) | 2020-03-25 | 2020-03-25 | DC motor testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218794.4A CN113447812B (en) | 2020-03-25 | 2020-03-25 | DC motor testing device |
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| CN113447812A CN113447812A (en) | 2021-09-28 |
| CN113447812B true CN113447812B (en) | 2024-03-26 |
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