CN210923070U - Speed reducer hysteresis curve test platform - Google Patents
Speed reducer hysteresis curve test platform Download PDFInfo
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- CN210923070U CN210923070U CN201922190729.0U CN201922190729U CN210923070U CN 210923070 U CN210923070 U CN 210923070U CN 201922190729 U CN201922190729 U CN 201922190729U CN 210923070 U CN210923070 U CN 210923070U
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- output shaft
- speed reducer
- rack
- hysteresis curve
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Abstract
The utility model discloses a reduction gear hysteresis curve test platform, including rack, servo motor, the reduction gear mounting bracket of setting on the rack, fix reduction gear, output shaft connecting piece on the reduction gear mounting bracket and be used for acquireing output shaft connecting piece's turned angle's measuring piece. The servo motor drives the output shaft connecting piece; the output shaft connecting piece is fixedly connected to an output shaft of the speed reducer. The speed reducer is provided with a test input shaft, and the first end of the test input shaft is fixedly connected to the speed reducer mounting frame through the input shaft positioning plate. The second end of the test input shaft is fixed on the output shaft connecting piece through a bearing. The utility model discloses pass through the bearing installation with the one end that the test input shaft is close to the output shaft connecting piece fixed, avoided the test input shaft swing that appears when receiving the moment of torsion effect or rock, improved the accuracy of acquireing hysteresis curve.
Description
Technical Field
The utility model relates to a reduction gear testing arrangement, especially a reduction gear hysteresis curve test platform.
Background
The RV reducer is a planetary transmission mechanism with small tooth difference. The high-precision transmission device has the advantages of small volume, high rigidity, strong bearing capacity, long service life, high precision and the like, and is widely applied to the precision transmission fields of industrial robots, medical instruments, aerospace equipment, numerical control machines and the like at present.
The torsional rigidity and the transmission precision are used as core technical parameters of the RV reducer, the bearing capacity of the reducer is directly reflected, and the two indexes of the reducer are calculated from a hysteresis curve. The testing method of the hysteresis curve is characterized in that an input shaft of the RV reducer is fixed, gradual torque is applied to an output end, the rotation angle and the applied torque of the output end are measured, and the torque is drawn by taking the torque as an abscissa and the torsion angle as an ordinate.
In the prior art, an input shaft of an RV reducer is generally fixed at one end only, and one end of the input shaft close to an output shaft of the RV reducer is in a free state. One end of the input shaft in a free state is likely to swing in a process of receiving the torque transmitted from the output shaft, thereby affecting the accuracy of the hysteresis curve.
In view of the above, it is necessary to provide a platform for testing a hysteresis curve of a speed reducer, which can improve the accuracy of the hysteresis curve test.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reduction gear hysteresis curve test platform to solve not enough among the prior art, it can the effectual accuracy that improves the hysteresis curve test.
The utility model provides a speed reducer hysteresis curve test platform, which comprises a rack, a servo motor arranged on the rack, a speed reducer mounting rack, a speed reducer fixed on the speed reducer mounting rack, an output shaft connecting piece and a measuring piece for acquiring the rotation angle of the output shaft connecting piece;
the servo motor drives the output shaft connecting piece; the output shaft connecting piece is fixedly connected to an output shaft of the speed reducer;
the speed reducer is provided with a test input shaft, and the first end of the test input shaft is fixedly connected to the speed reducer mounting frame through an input shaft positioning plate; the second end of the test input shaft is fixed on the output shaft connecting piece through a bearing
As a further preferable scheme, the servo motor drives the output shaft connecting piece through a gear box, an input shaft of the gear box is connected with a rotating shaft of the servo motor, and an output shaft of the gear box is fixedly connected with the output shaft connecting piece.
As a further preferable scheme, the gear box and a rotating shaft of the servo motor are fixedly connected through a diaphragm coupling.
As a further preferred scheme, the measuring part is a digital display angle gauge, and comprises a stator, a rotor rotationally matched with the stator and a scale code disc for recording the rotation angles of the stator and the rotor; the scale code disc is arranged between the stator and the rotor;
an output shaft of the gearbox is connected to a first end of the output shaft connection through the rotor;
the stator is fixed on the box body of the gear box.
As a further preferred scheme, a first clamp part matched with the output shaft of the gear box is arranged at the first end of the rotor, and a second clamp part matched with the first end of the output shaft connecting part is arranged at the second end of the rotor.
As a further preferable scheme, the reducer mounting bracket comprises a support frame for fixing the reducer and a bottom plate fixedly connected with the support frame, the bottom plate is in sliding fit with the rack, and the bottom plate slides on the rack close to or far away from the gear box.
As a further preferable scheme, a first slide rail is arranged on the rack, and a first slide block in sliding fit with the first slide rail is arranged on the bottom plate.
As a further preferable scheme, a locking piece for locking the position of the bottom plate is further arranged on the bottom plate,
the locking piece comprises a locking handle and a locking screw rod, and a threaded hole matched with the locking screw rod is formed in the bottom plate;
the first end of the locking screw rod is fixedly connected with the locking handle, and the second end of the locking screw rod penetrates through the threaded hole and freely extends towards the direction of the rack.
As a further preferable scheme, a first stop block for limiting the sliding stroke of the bottom plate is further arranged on the rack.
As a further preferred scheme, the servo motor is fixedly installed on the bottom plate through a motor support frame, and the motor support frame is in sliding fit with the rack.
Compared with the prior art, the embodiment of the utility model provides a to test the input shaft and pass through the bearing installation fixed near the one end of output shaft connecting piece, spacing when having realized test input shaft both ends through above-mentioned design, avoided the test input shaft swing that appears when receiving the moment of torsion effect or rock, improved the accuracy of acquireing hysteresis curve.
Drawings
Fig. 1 is a first axonometric view of a speed reducer hysteresis curve testing platform disclosed in an embodiment of the invention;
fig. 2 is a second axis mapping diagram of a speed reducer hysteresis curve testing platform disclosed in the embodiment of the present invention;
fig. 3 is a front view of a speed reducer hysteresis curve testing platform disclosed in the embodiment of the present invention;
FIG. 4 is a top view of FIG. 3
Fig. 5 is a schematic view of an installation structure of a speed reducer in the speed reducer hysteresis curve testing platform disclosed in the embodiment of the present invention;
fig. 6 is a first axonometric view of a measuring part in the speed reducer hysteresis curve testing platform disclosed in the embodiment of the invention;
fig. 7 is a second axis mapping diagram of a measuring part in the speed reducer hysteresis curve testing platform disclosed by the embodiment of the invention;
description of reference numerals: 1-a rack, 11-a first slide rail, 12-a first stop block, 13-a second slide rail, 14-a second stop block,
2-servo motor, 21-diaphragm coupling, 3-reducer mounting rack, 31-support rack, 32-bottom plate, 321-first slide block, 322-locking piece, 323-locking handle, 324-locking screw rod,
4-speed reducer, 41-test input shaft,
5-output shaft connecting piece, 50-bearing mounting hole, 51-connecting disc, 52-connecting shaft,
6-measuring part, 61-stator, 62-rotor, 621-first clamping sleeve, 622-second clamping sleeve, 63-
7-input shaft positioning plate, 8-bearing, 9-gear box, 91-box body,
10-a motor supporting frame, 101-a motor supporting plate, 102-a motor base and 1021-a second sliding block.
Detailed Description
The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
The embodiment of the utility model provides a: as shown in fig. 1-4, comprises a rack 1, a servo motor 2, a reducer mounting rack 3, a reducer 4, an output shaft connecting piece 5 and a measuring piece 6; the servo motor 2 and the reducer mounting frame 3 are arranged on the rack 1 at a distance. The speed reducer 4 is fixedly installed on the speed reducer installation frame 3, the output shaft connecting piece 5 is fixedly connected with an output shaft of the speed reducer 4, the servo motor 2 drives the output shaft connecting piece 5, the output shaft connecting piece 5 is connected to an output shaft of the speed reducer, and torque transmitted by the servo motor 2 is transmitted to an output shaft of the speed reducer 4 through the output shaft connecting piece 5.
The measuring member 6 is used to measure the angle of rotation of the output shaft coupling 5 when subjected to the torque transmitted by the servo motor 2. The torque transmitted by the servo motor 2 can be obtained, and at the moment, the hysteresis curve can be obtained according to the torque and the rotating angle only by fixing the input shaft of the speed reducer 4.
In the prior art, the first end of the input shaft of the speed reducer 4 is directly fixed on a corresponding fastener, and the second end of the input shaft extends near the output end of the speed reducer 4 in a free state.
As shown in fig. 5, in order to solve the above technical problem, according to the embodiment of the present invention, a testing input shaft 41 is provided on the speed reducer 4, and a first end of the testing input shaft 41 is fixedly connected to the speed reducer mounting bracket 3 through an input shaft positioning plate 7. The second end of the test input shaft 41 is fixed to the output shaft connection 5 by a bearing 8. The first end installation that will test input shaft 41 through input shaft locating plate 7 is fixed, and the second end that will test input shaft 41 through bearing 8 also carries out spacing fixed, makes test input shaft 41 can be more stable when receiving the moment of torsion effect, the swing can not appear or rock to the hysteresis curve's that test platform obtained accuracy has been improved.
Specifically, an outer gear ring meshed with a planetary gear in the speed reducer 4 is arranged on a position, close to the second end, on the side wall of the test input shaft 41, a through hole is formed in the center position of the input shaft positioning plate 7, the second end of the test input shaft 41 penetrates through the through hole and then is inserted into an inner ring of the bearing 8 and is in interference fit with the inner ring, and the first end of the test input shaft 41 is fixed on the input shaft positioning plate 7 through a bolt.
In this embodiment, the servo motor 2 can control the torque output by the motor, and the servo motor 2 provides the torque for the output shaft of the speed reducer 4 through the output shaft connecting piece 5. The measuring member 6 obtains the angle of rotation of the output end of the speed reducer 4 by measuring the angle of rotation of the output shaft connecting member 5. The hysteresis curve of the speed reducer can be obtained by obtaining the torque and the rotation angle of the output shaft.
In this embodiment, one end of the test input shaft 41 close to the output shaft connecting piece 5 is fixed on the output shaft connecting piece 5 through the bearing 8, the test input shaft 41 is limited at two ends at the same time through the design, the swing of the test input shaft 41 when the test input shaft is subjected to torque action is avoided, and the accuracy of obtaining the hysteresis curve is improved. The bearing 8 is an outer ring type needle bearing in this embodiment.
Because the drive power that servo motor 2 produced is limited, as the utility model discloses further improvement still is provided with gear box 9, transmits servo motor 2's moment of torsion through gear box 9. Specifically, an input shaft of the gear box 9 is fixedly connected with a rotating shaft of the servo motor 2 through a diaphragm coupling 21. The gear box 9 and the servo motor 2 are connected through the diaphragm coupling 21, so that gapless rotation between the two can be realized, and the transmission precision is improved. The output shaft of the gearbox 9 drives the output shaft connection 5. The arrangement of the gear box 9 can effectively amplify the torque transmitted by the motor 2, so that different speed reducers 4 can be used better, and the power output of the motor 2 can be reduced.
As shown in fig. 6-7, in the present embodiment, the measuring component 6 is a digital display angle meter, which is composed of a high-precision angle ruler and an electronic recorder, and is different from the angle encoder on the market in that two sets of electric signal pulse quantities with 90-degree phase difference are recorded to record the angle. The digital display angle meter measuring range of the embodiment is 0-360 degrees, and measurement can be carried out in the clockwise direction and the anticlockwise direction. The main body structure of the measuring part 6 is divided into a stator 61 and a rotor 62, a scale code disc is connected between the rotor 62 and the stator 61, and the function of the scale code disc is to record the rotation angle of the rotor 62 relative to the stator 61 and then transmit the rotation angle to a master control box through an electric signal.
The output shaft of the gearbox 9 is connected to a first end of the output shaft connection 5 via a rotor 62; the stator 61 is fixed to a case 91 of the gear case 9. The rotor 62 is used as a connecting piece in the driving process of the gear box 9 and the output shaft connecting piece 5, the rotor 62 is directly used for transmitting torque, and the angle of the output shaft connecting piece 5 which rotates in the torque process can be accurately obtained by connecting the rotor 62 to the output shaft connecting piece 5. The rotor 62 and the stator 61 rotate relatively, and when the rotor 62 is fixedly connected with the output shaft of the gear box 9, the stator 61 needs to be fixedly installed on the box body of the gear box 9.
In order to conveniently realize the installation and fixation of the rotor 62, the two ends of the rotor 62 are provided with clamping sleeve structures, and the arrangement of the clamping sleeve structures can ensure that the rotor 62 is directly clamped and connected with the output shaft of the gear box 9 and the output connecting shaft 5, so that a coupler is avoided being used in the connection process of the rotor 62 and the gear box 9, and meanwhile, the coupler is also avoided being used in the connection process of the rotor 62 and the output connecting shaft 5. The stator 61 is provided with a screw hole connected to the case 91 of the gear case 9, and the stator 61 is fixed to the case 91 by a screw.
Specifically, the clamping sleeve structure is a clamping structure, a first clamping piece 621 matched with the output shaft of the gear box 9 is arranged at the first end of the rotor 62, and a second clamping piece 622 matched with the first end of the output shaft connecting piece 5 is arranged at the second end of the rotor 62. By connecting the rotor 62 and the gear box 9 or the output shaft connecting member 5 by a clip, the size of the output shaft of the gear box 9 or the output shaft connecting member 5 can be adjusted to be suitable, and the adaptability of the rotor 62 is improved.
In this embodiment, the output shaft connecting member 5 includes a connecting plate 51 and a connecting shaft 52 vertically fixed on the connecting plate 51, the connecting plate 51 is fixedly connected with the output shaft of the speed reducer 4, the servo motor 2 drives the connecting shaft 52 to rotate, and in this embodiment, the connecting shaft 52 is fixedly connected with the second clamp member 622 of the rotor 62. The connection plate 51 is provided with a bearing mounting hole 50, and the outer ring of the bearing 8 is fitted in the bearing mounting hole 50 by interference fit. The test input shaft 41 is then interference fitted with the inner race of the bearing 8.
Because the gear box 9 and the output shaft connecting piece 5 are connected through the rotor 62, in order to facilitate the connection and fixation of the gear box 9, the output shaft connecting piece 5 and the rotor 62, the reducer mounting frame 3 is slidably mounted on the rack 1, the gear box 9 is fixedly mounted on the rack 1, and the reducer 4 is fixedly mounted on the reducer mounting frame 3, so that the reducer 4 moves close to or away from the gear box 9 on the rack 1 along with the sliding of the reducer mounting frame 3. In the process of installing the rotor 62, the reducer mounting frame 3 is moved away from the gear box 9, the first end of the rotor 62 is installed and fixed on the connecting shaft 52 on the output shaft connecting piece 5, and then the rotor 62 and the reducer mounting frame 3 move together in the direction of the gear box 9 to enable the second end of the rotor 62 to be connected and fixed with the gear box 9. After the gear box 9 and the output shaft connecting piece 5 are fixed by the rotor 62, the reducer mounting frame 3 is locked and fixed on the stand 1 by the locking piece 322.
In this embodiment the gantry 1 is a welded assembly and the gantry 1 is used to support the whole device. The speed reducer mounting frame 3 comprises a supporting frame 31 used for fixing the speed reducer 4 and a bottom plate 32 fixedly connected with the supporting frame 31, and the bottom plate 32 is in sliding fit with the rack 1. The support frame 31 is vertically fixed on the bottom plate 32, and a reinforcing sheet metal part is further arranged between the support frame 31 and the bottom plate 32 to improve the firmness of the whole speed reducer mounting frame 3.
Specifically, a first slide rail 11 is arranged on the rack 1, and a first slide block 321 which is in sliding fit with the first slide rail 11 is arranged on the bottom plate 32. The first slide rail 11 is provided with two, and the stability of the bottom plate 32 in the sliding process on the rack 1 can be ensured by arranging the two first slide rails 11.
In this embodiment, the locking member 322 is disposed on the bottom plate 32, the locking member 322 includes a locking handle 323 and a locking screw 324, and the bottom plate 32 is provided with a threaded hole matching with the locking screw 324.
The first end of the locking screw 324 is fixedly connected with the locking handle 323, the locking handle 33 is used for conveniently realizing screwing the locking screw 324, and the second end of the locking screw 324 penetrates through the threaded hole and freely extends towards the direction of the rack 1. The locking screw 324 moves up and down in the screw hole when the locking screw 324 is screwed by the locking knob 323. The locking of the base plate 32 is achieved when the second end of the locking screw 324 is moved downwards against the stand 1. For better locking of the bottom plate 32, a locking block is fixedly mounted on the second end of the locking screw 324.
Further, the rack 1 is further provided with a first stopper 12 for limiting the sliding stroke of the bottom plate 32. The first stop block 12 serves to limit the maximum travel of the bottom plate 32 in a direction away from the gear box 9.
Further, in order to conveniently realize the installation and fixation of the servo motor 2 and the gear box 9, the servo motor 2 is installed and fixed on the bottom plate 32 through a motor support frame 10, and the motor support frame 10 is in sliding fit with the rack 1. In the installation process of the servo motor 2 and the gear box 9, the servo motor 2 moves in the direction away from the gear box 9, then the first end of the diaphragm coupling 21 is fixedly installed on the output shaft of the servo motor 2, and then the servo motor 2 moves in the direction close to the gear box 9, so that the second end of the diaphragm coupling 21 is fixedly installed on the gear box 9. After the servo motor 2 is connected and fixed with the gear box 9, the floor 32 is locked and fixed with the locking piece of the motor supporting frame.
Specifically, the motor support frame 10 includes a motor support plate 101 and a motor base 102, the servo motor 2 is fixedly installed on the motor support plate 101, the motor support plate 101 is vertically fixed on the motor base 102, a second slider 1021 is arranged on the motor base 102, and a second guide rail 13 which is in sliding fit with the second slider 1021 is arranged on the rack 1. A second stopper 14 is disposed on the motor base 102, and the second stopper 14 is used for limiting the sliding stroke of the motor base 102.
The motor holder locking member has the same structure as the locking member 322 in this embodiment. Again, it will not be described in further detail.
The utility model provides a hysteresis curve test platform of reduction gear. Taking the reducer as an example, the hysteresis curve testing procedure is described as follows:
the method comprises the following steps: the bearing 8 is arranged in a bearing mounting hole 50 on the output connecting shaft 5;
step two: mounting the output shaft of the speed reducer 4 and the output connecting shaft 5 together, i.e., fixing the connecting disc 51 of the output connecting shaft 5 on the output shaft of the speed reducer 4 by screws to form an assembly 1;
step three: moving the reducer mounting bracket 3 to one end far away from the gear box 9, and mounting the assembly 1 on the reducer mounting bracket 3, namely fixing the shell of the reducer 4 on the reducer mounting bracket by using screws;
step four: the second end of the test input shaft 41 passes through the through hole at the central position on the input shaft fixing plate 7, is inserted into the inner ring of the bearing 8, slightly rotates the test input shaft 41, and connects and fixes the first end of the test input shaft 41 with the input shaft fixing plate 7 through a bolt;
step six: a first end of a stator 61 of the measuring part 6 is fixedly arranged on the box body 91, the speed reducer mounting frame 3 is pulled to be close to a second end of the measuring part 6, and then the measuring part 6 is fixedly connected with a connecting shaft 52 of the output shaft connecting part 5;
step seven: the lockable handle 323 is rotated to abut the locking screw 324 against the upper surface of the stand 1, thereby locking the position of the reducer mounting bracket 3.
The power supply is switched on, the loading of the torque is controlled by the servo motor 2, and the torque is adjusted by the gear box 9 and then transmitted to the rotor 62 of the measuring part 6 and further transmitted to the output shaft connecting part 5 through the rotor 62. The measuring part 6 is used for recording the real-time rotation angle of the output shaft connecting part 5, the output shaft connecting part 5 and the output shaft of the speed reducer 4 are connected into a whole without relative rotation, namely the measuring part 6 actually records the rotation angle of the output shaft of the speed reducer 4.
The angular displacement theta and the torque T of the servomotor 2 are recorded by the measuring element 6Electric machineAnd a reduction ratio i of the gear box 9Reduction gearboxAnd transmission efficiency ηReduction gearboxThe rotational angle (theta) and the torque (T) of the output shaft of the speed reducer 4 can be plottedElectric machine·iReduction gearbox·ηReduction gearbox) The curve of (d) is the hysteresis curve.
Taking an RV40 reducer as an example, the rated torque of the RV40 reducer is 412Nm, and the servo motor 2 is controlled to be slowly loaded to T in the forward directionElectric machine·iReduction gearbox·ηReduction gearboxNot less than 412Nm, and then reversely and slowly loading the mixture to TElectric machine·iReduction gearbox·ηReduction gearboxNot less than 412Nm, and recording the rotation angle (theta) and the torque (T) of the output shaft of the speed reducer 4 in the whole test processElectric machine·iReduction gearbox·ηReduction gearbox) And finally, obtaining an accurate and complete hysteresis curve (including test data) on a panel of the master control box.
The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.
Claims (10)
1. A speed reducer hysteresis curve test platform is characterized by comprising a rack, a servo motor arranged on the rack, a speed reducer mounting rack, a speed reducer fixed on the speed reducer mounting rack, an output shaft connecting piece and a measuring piece for acquiring the rotation angle of the output shaft connecting piece, wherein the speed reducer mounting rack is arranged on the rack;
the servo motor drives the output shaft connecting piece; the output shaft connecting piece is fixedly connected to an output shaft of the speed reducer;
the speed reducer is provided with a test input shaft, and the first end of the test input shaft is fixedly connected to the speed reducer mounting frame through an input shaft positioning plate; and the second end of the test input shaft is fixed on the output shaft connecting piece through a bearing.
2. The retarder hysteresis curve test platform of claim 1, wherein: the servo motor drives the output shaft connecting piece through the gear box, an input shaft of the gear box is connected with a rotating shaft of the servo motor, and an output shaft of the gear box is fixedly connected with the output shaft connecting piece.
3. The retarder hysteresis curve test platform of claim 2, wherein: the gear box and the rotating shaft of the servo motor are fixedly connected through a diaphragm coupling.
4. The retarder hysteresis curve test platform of claim 2, wherein: the measuring part is a digital display angle gauge and comprises a stator, a rotor in rotating fit with the stator and a scale code disc for recording the rotating angles of the stator and the rotor; the scale code disc is arranged between the stator and the rotor;
an output shaft of the gearbox is connected to a first end of the output shaft connection through the rotor;
the stator is fixed on the box body of the gear box.
5. The retarder hysteresis curve test platform of claim 4, wherein: the first end of the rotor is provided with a first clamp part matched with the output shaft of the gear box, and the second end of the rotor is provided with a second clamp part matched with the first end of the output shaft connecting part.
6. The retarder hysteresis curve test platform of claim 2, wherein: the speed reducer mounting frame comprises a supporting frame used for fixing the speed reducer and a bottom plate fixedly connected with the supporting frame, the bottom plate is in sliding fit with the rack, and the bottom plate slides on the rack close to or far away from the gear box.
7. The retarder hysteresis curve test platform of claim 6, wherein: the rack is provided with a first sliding rail, and the bottom plate is provided with a first sliding block in sliding fit with the first sliding rail.
8. The retarder hysteresis curve test platform of claim 6, wherein: the bottom plate is also provided with a locking piece for locking the position of the bottom plate,
the locking piece comprises a locking handle and a locking screw rod, and a threaded hole matched with the locking screw rod is formed in the bottom plate;
the first end of the locking screw rod is fixedly connected with the locking handle, and the second end of the locking screw rod penetrates through the threaded hole and freely extends towards the direction of the rack.
9. The retarder hysteresis curve test platform of claim 6, wherein: the rack is also provided with a first stop block for limiting the sliding stroke of the bottom plate.
10. The retarder hysteresis curve test platform of claim 6, wherein: the servo motor is fixedly installed on the bottom plate through a motor support frame, and the motor support frame is in sliding fit with the rack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922190729.0U CN210923070U (en) | 2019-12-09 | 2019-12-09 | Speed reducer hysteresis curve test platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922190729.0U CN210923070U (en) | 2019-12-09 | 2019-12-09 | Speed reducer hysteresis curve test platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210923070U true CN210923070U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922190729.0U Active CN210923070U (en) | 2019-12-09 | 2019-12-09 | Speed reducer hysteresis curve test platform |
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| CN (1) | CN210923070U (en) |
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2019
- 2019-12-09 CN CN201922190729.0U patent/CN210923070U/en active Active
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