CN205679393U - A kind of corner-type Hooks coupling universal coupling testing stand - Google Patents
A kind of corner-type Hooks coupling universal coupling testing stand Download PDFInfo
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- CN205679393U CN205679393U CN201620319834.3U CN201620319834U CN205679393U CN 205679393 U CN205679393 U CN 205679393U CN 201620319834 U CN201620319834 U CN 201620319834U CN 205679393 U CN205679393 U CN 205679393U
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- testing stand
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- hooks coupling
- universal coupling
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- 230000008878 coupling Effects 0.000 title claims abstract description 170
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- 238000012360 testing method Methods 0.000 title claims abstract description 134
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 4
- 210000000056 organ Anatomy 0.000 claims description 4
- 229920001967 Metal rubber Polymers 0.000 claims description 3
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- 238000005266 casting Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000013461 design Methods 0.000 description 3
- 238000010835 comparative analysis Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Abstract
The open a kind of corner-type Hooks coupling universal coupling testing stand of this utility model, including: testing stand, power set, speed-changing gear box, sensing device I, sensing device II, positive coupling I, positive coupling II, positive coupling III, Hooks coupling universal coupling test specimen, torque loader, rotation angle mechanism, vibration isolator；Described power set are fixedly mounted on the stage body of described testing stand；Described power set are connected with the power shaft of described speed-changing gear box by described positive coupling I；The output shaft of described speed-changing gear box is connected with the power shaft of described Hooks coupling universal coupling test specimen by positive coupling II；The output shaft of described Hooks coupling universal coupling test specimen is connected with described torque loader by described positive coupling III；Described torque loader is fixedly mounted on described rotation angle mechanism；The bottom of described testing stand is equipped with described vibration isolator；The angle range of this utility model testing stand is in 45 °～45 °, it is achieved the moment of torsion of Hooks coupling universal coupling, efficiency and vibration-testing test under high pulling torque large deflection angle.
Description
Technical field
This utility model relates to a kind of Hooks coupling universal coupling and tests its motion when input and outfan exist large deflection angle
Learn and the table apparatus of kinetic parameter, be specifically related to a kind of corner-type Hooks coupling universal coupling testing stand.
Background technology
Hooks coupling universal coupling is as parts indispensable in transmission, and its application is quite varied, along with scientific and technological development, newly sets
Standby use, the performance parameter of Hooks coupling universal coupling is required more accurately, comprehensively by people, it is therefore necessary to the displacement to Hooks coupling universal coupling
Compensation, life-span, efficiency, damping, heating, energy-conservation, overload, maximum offset etc. carry out testing research, and are universal
The reliability design of axial organ provides research technique and data, enable engineers and technicians comprehensively, reasonable design select universal
Shaft coupling, therefore develops a kind of special corner-type Hooks coupling universal coupling testing stand particularly important.
Summary of the invention
The purpose of this utility model is to provide the Hooks coupling universal coupling testing stand of a kind of simple in construction, flexible configuration, tests ten thousand
To shaft coupling test specimen transmission moment of torsion, transmission efficiency and the prison of vibration characteristics when input and outfan exist large deflection angle
Survey.
For reaching above-mentioned purpose, the technical scheme that this utility model is used is as follows:
A kind of corner-type Hooks coupling universal coupling testing stand, including: testing stand, power set, speed-changing gear box, sensing device I,
Sensing device II, positive coupling I, positive coupling II, positive coupling III, Hooks coupling universal coupling test specimen, torque loader,
Rotation angle mechanism, vibration isolator；Described power set are fixedly mounted on the stage body of described testing stand；Described power set are by described
Positive coupling I is connected with the power shaft of described speed-changing gear box；The output shaft of described speed-changing gear box passes through positive coupling
II is connected with the power shaft of described Hooks coupling universal coupling test specimen；The output shaft of described Hooks coupling universal coupling test specimen is by described rigidity shaft coupling
Device III is connected with described torque loader；Described torque loader is fixedly mounted on the worm sector dish of described rotation angle mechanism
On centrage；The bottom of described testing stand is equipped with described vibration isolator；Described vibration isolator uses the metal-rubber of high elastic modulus, when
When resonance occurs in described Hooks coupling universal coupling test specimen on testing stand, whole testing stand is made to have the function of shock resistance, noise reduction, the most again
Testing stand can be made to keep stable in process of the test.
Further, described testing stand includes that testing stand I and testing stand II, described testing stand I are covered with the most equidistant and indulge
It is bolted on described testing stand I to equidistant T-slot, described power set and described speed-changing gear box；Described examination
Test and on platform II, have the most equidistant T-slot, and arcuate groove and square groove, the edge of described arcuate groove is with center as zero degree
It is carved with angle value, described arcuate groove has race, be used for coordinating the fortune of the universal rolling wheel on the axis of guide of described rotation angle mechanism
Dynamic, it is achieved the smooth rotation of described rotation angle mechanism, described testing stand I and described testing stand II are single-casting.
Further, described power set include that motor and pedestal, described motor are fixed by bolts to described pedestal
On, the output shaft of described motor and described positive coupling I are connected by flat key and are transferred out by power.
Further, described speed-changing gear box is Secondary Helical Cylindrical Gear change speed gear box, realize high pulling torque transmission and
The change of rotating speed.
Further, described positive coupling I, described positive coupling II, described positive coupling III all use flange
Shaft coupling, is used for transmitting moment of torsion and motion.
Further, described torque loader includes inputting support, connecting shaft I, cylinder body, oil cylinder, connecting shaft II, output
Support, slide block guide rail；Described input supports and is connected with described connecting shaft I, and one end of described connecting shaft I and described cylinder body is nibbled in passing through
Conjunction helical teeth connects, and the other end of described cylinder body is connected by internal messing helical teeth with described connecting shaft II, described connecting shaft II and institute
Stating output and support connection, described slide block guide rail is arranged on the bottom that described input supports and output supports, and described oil cylinder has two,
The outer rim being each passed through described cylinder body supports be connected with described input support and described output；Described connecting shaft I and described connection
Having helical teeth on axle II, the two ends of described cylinder body have the helical teeth being meshed with described connecting shaft I and described connecting shaft II, described
The helical teeth at cylinder body two ends is contrary rotation direction；Described torque loader realizes described connecting shaft I and described connection by described oil cylinder
Distance regulation between axle II, realizes the transmission of high pulling torque by the transmission of contrary rotation direction helical teeth；The structure of described torque loader
The pressure that design realizes--the moment of torsion linearity is high, and loading accuracy is high, overcome coefficient of friction unstable, contacts uneven causing
Torque ripple problem, loads power little, and serious problem of generating heat the most also has overload protection function.
Further, described sensing device I includes torque speed sensor I, vibrating sensor, sensor base I, described
Torque speed sensor I is arranged on the power shaft of described Hooks coupling universal coupling test specimen, is used for monitoring the big of input torque and rotating speed
Little；The support of described vibrating sensor is arranged in described sensor base I, and described sensor base I is fixedly mounted on described
On testing stand I, the probe of described vibrating sensor is against on the power shaft of described Hooks coupling universal coupling test specimen with certain gap；Institute
Stating sensing device II, to include that torque speed sensor II and sensor base II, described sensor base II are fixedly mounted on described
On worm sector dish；Described torque speed sensor II is arranged on the output shaft of described Hooks coupling universal coupling test specimen, is used for monitoring
Output moment of torsion and the size of rotating speed；Under duty, described torque speed sensor I and described torque speed sensor II is used for
Measure the input of described Hooks coupling universal coupling test specimen and the torque of output shaft and rotating speed size, by the parameter of output with input is carried out
Comparative analysis, draws the transmission efficiency of Hooks coupling universal coupling test specimen when there is certain deflection angle；Described vibrating sensor is used for surveying
Measure described Hooks coupling universal coupling test specimen vibrational state in operation process.
Further, described rotation angle mechanism includes worm sector dish, worm screw, bearing base and servomotor, described fan
The edge of shape worm gear dish is with the axis of guide, and with two universal rolling wheels on the described axis of guide, described universal rolling wheel is at described arc
Roll in the race of groove；The center of rotation of described worm sector dish uses the rotation of hinge arrangement and the arcuate groove of described testing stand II
Turn center to connect；The hinge arrangement of described worm sector dish matches with the axis of guide and realizes steadily turning of described worm sector dish
Dynamic；The centrage of described worm sector dish is marked with center pointer, and the scale value that center pointer points on described arcuate groove is
Angle that the center of described worm sector dish turns over i.e. the deflection angle of Hooks coupling universal coupling test specimen；Described bearing base is fixed
Being arranged in the square groove of described testing stand II, described bearing base supports described worm screw, described worm screw and described servo electricity
Machine is connected；Described servomotor provides power, drives described worm screw to rotate, and described worm screw drives described worm sector dish to rotate,
Rotate in the axis of guide of the most described worm sector dish arcuate groove on described testing stand II, finally realize described moment of torsion and load
The smooth rotation of device, the corner that described rotation angle mechanism realizes is in the range of-45 °～45 °；When testing stand enters in the angle determined
During row test, described rotation angle mechanism has auto-lock function, it is achieved the safety of test is carried out.
Further, described a kind of corner-type Hooks coupling universal coupling testing stand, also comprise a control system, described control system
System controls the rapport of all parts on whole testing stand.
Implementing a kind of corner-type Hooks coupling universal coupling testing stand of the present utility model, it has the beneficial effects that:
(1) use a kind of corner-type Hooks coupling universal coupling testing stand of the present utility model, simple in construction, flexible configuration, and be prone to
Load is changed in operation process；
(2), for monitoring the moment of torsion of shaft coupling, transmission efficiency, vibration, it is swift in response, possesses dynamic display of functional, show in real time
Show test result, it is ensured that the reliability of test data, improve testing efficiency.
Accompanying drawing explanation
Fig. 1: this utility model one corner-type Hooks coupling universal coupling testing stand front view；
Fig. 2: a kind of corner-type Hooks coupling universal coupling testing stand top view；
Fig. 3: a kind of corner-type Hooks coupling universal coupling bearing test-bed torque loader 3 dimensional drawing.
In figure: 1 testing stand, 11 testing stand I, 12 testing stand II, 2 power set, 21 motor, 22 bases
Seat, 31 positive coupling I, 32 positive coupling II, 33 positive coupling III, 4 speed-changing gear boxs, 5 moments of torsion add
Carrying device, 51 inputs support, and 52 outputs support, 53 connecting shafts I, 54 connecting shafts II, 55 cylinder bodies, 56 oil cylinders,
57 slide block guide rails, 61 sensing device I, 611 torque sensor I, 612 vibrating sensor I, 613 sensor base
I, 62 sensing device II, 621 torque speed sensor II, 622 sensor base II, 7 Hooks coupling universal coupling test specimens,
8 rotation angle mechanisms, 81 worm sector dishes, 82 worm screws, 83 bearing bases, 84 servomotors, 9 vibration isolators.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is further described through.
As shown in Figure 1 to Figure 3, a kind of corner-type Hooks coupling universal coupling testing stand, including: testing stand 1, power set 2, gear
Change speed gear box 4, sensing device I61, sensing device II62, positive coupling I31, positive coupling II32, positive coupling
III33, Hooks coupling universal coupling test specimen 7, torque loader 5, rotation angle mechanism 8, vibration isolator 9；Described power set 2 are fixedly mounted on institute
State on the stage body of testing stand 1；The described power set 2 power shaft by described positive coupling I31 with described speed-changing gear box 4
It is connected；The output shaft of described speed-changing gear box 4 is by the power shaft phase of positive coupling II32 with described Hooks coupling universal coupling test specimen 7
Even；The output shaft of described Hooks coupling universal coupling test specimen 7 is connected with described torque loader 5 by described positive coupling III33；Institute
State on the centrage of the worm sector dish that torque loader 5 is fixedly mounted on described rotation angle mechanism 8；The bottom of described testing stand 1
It is equipped with described vibration isolator 9；Described vibration isolator 9 uses the metal-rubber of high elastic modulus, when Hooks coupling universal coupling described on testing stand 1
When resonance occurs in test specimen 7, make whole testing stand have the function of shock resistance, noise reduction, testing stand can be made again in process of the test simultaneously
Middle holding is stable.
As shown in Figure 1 to Figure 3, the method for work concrete steps of a kind of corner-type of this utility model Hooks coupling universal coupling testing stand
As follows: when taking deflection angle and being 30 °, servomotor 84 provides power, drives worm screw 82 to rotate, and worm screw 82 drives worm sector dish
81 rotate, and rotate, on worm sector dish 81 in the axis of guide of worm sector dish 81 arcuate groove on testing stand II12 simultaneously
Center pointer points to 30 ° of scales on arcuate groove, is the input of testing stand and the deflection angle of outfan existence 30 °；Power
Device 2 provides power, drives Hooks coupling universal coupling test specimen 7 to rotate through speed-changing gear box 4, the test of torque loader 5 regulation simultaneously
Overall load on platform；In process of the test, the torque speed sensor I611 of Hooks coupling universal coupling test specimen 7 left and right sides and torque axis
Speed sensor II621 gathers the signal of Hooks coupling universal coupling test specimen 7 input and outfan, passes to the calculating in control system
Machine, completes the monitoring of Hooks coupling universal coupling test specimen 7 moment of torsion, simultaneously by the parameter comparative analysis of output with input, draws when existing
The transmission efficiency of Hooks coupling universal coupling test specimen 7 during certain deflection angle, and the vibrating sensor on the power shaft of Hooks coupling universal coupling test specimen 7
612 gather vibration signal passes to the computer in control system, observes the operation conditions of Hooks coupling universal coupling test specimen 7, records ten thousand
To the Vibration Condition of shaft coupling test specimen 7, draw the vibrational state of Hooks coupling universal coupling test specimen 7；When taking other deflection angles, step is same
On.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all at this
Any amendment, equivalent and the improvement etc. made within the spirit of utility model and principle, should be included in this utility model
Protection domain within.
Claims (9)
1. a corner-type Hooks coupling universal coupling testing stand, it is characterised in that including: testing stand (1), power set (2), gear become
Speed case (4), sensing device I(61), sensing device II(62), positive coupling I(31), positive coupling II(32), rigidity connection
Axial organ III(33), Hooks coupling universal coupling test specimen (7), torque loader (5), rotation angle mechanism (8), vibration isolator (9)；Described power fills
Put (2) to be fixedly mounted on the stage body of described testing stand (1)；Described power set (2) pass through described positive coupling I(31) with
The power shaft of described speed-changing gear box (4) is connected；The output shaft of described speed-changing gear box (4) passes through positive coupling II(32) with
The power shaft of described Hooks coupling universal coupling test specimen (7) is connected；The output shaft of described Hooks coupling universal coupling test specimen (7) is joined by described rigidity
Axial organ III(33) it is connected with described torque loader (5)；Described torque loader (5) is fixedly mounted on described rotation angle mechanism (8)
Worm sector dish (81) centrage on；The bottom of described testing stand (1) is equipped with described vibration isolator (9)；Described vibration isolator (9)
Use the metal-rubber of high elastic modulus, when resonance occurs in described Hooks coupling universal coupling test specimen (7) on testing stand, make whole test
Platform has the function of shock resistance, noise reduction, and testing stand can be made again to keep stable in process of the test simultaneously.
2. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 1, it is characterised in that described testing stand (1) wraps
Include testing stand I(11) and testing stand II(12), described testing stand I(11) it is covered with the most equidistant and the most equidistant T-slot, described
Power set (2) and described speed-changing gear box (4) are bolted on described testing stand I(11) on；Described testing stand II
(12) the most equidistant T-slot is had on, and arcuate groove and square groove, the edge of described arcuate groove is carved with center for zero degree
Angled value, described arcuate groove has race, is used for coordinating the fortune of the universal rolling wheel on the axis of guide of described rotation angle mechanism (8)
Dynamic, it is achieved the smooth rotation of described rotation angle mechanism (8), described testing stand I(11) and described testing stand II(12) it is single-casting.
3. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 1, it is characterised in that described power set (2)
Including motor (21) and pedestal (22), described motor (21) is fixed by bolts on described pedestal (22), described motor
(21) output shaft and described positive coupling I(31) it is connected by flat key power is transferred out.
4. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 1, it is characterised in that described speed-changing gear box
(4) it is Secondary Helical Cylindrical Gear change speed gear box, realizes the transmission of high pulling torque and the change of rotating speed.
5. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 1, it is characterised in that described positive coupling I
(31), described positive coupling II(32), described positive coupling III(33) all use flange-face coupling, be used for transmit moment of torsion
And motion.
6. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 1, it is characterised in that described torque loader
(5) include input support (51), connecting shaft I(53), cylinder body (55), oil cylinder (56), connecting shaft II(54), output support (52),
Slide block guide rail (57)；Described input supports (51) and described connecting shaft I(53) be connected, described connecting shaft I(53) and described cylinder body
(55) one end is connected by internal messing helical teeth, the other end of described cylinder body (55) and described connecting shaft II(54) pass through internal messing
Helical teeth connects, described connecting shaft II(54) it is connected with described output support (52), described slide block guide rail (57) is arranged on described defeated
Entering to support (51) and the bottom of described output support (52), described oil cylinder (56) has two, is each passed through described cylinder body (55)
Flange supports (51) with described input and described output supports (52) and is connected；Described connecting shaft I(53) and described connecting shaft II
(54) having helical teeth on, the two ends of described cylinder body (55) have and described connecting shaft I(53) and described connecting shaft II(54) nibble mutually
The helical teeth closed, the helical teeth at described cylinder body (55) two ends is contrary rotation direction；Described torque loader (5) is real by described oil cylinder (56)
Existing described connecting shaft I(53) and described connecting shaft II(54) between distance regulation, realized greatly by the transmission of contrary rotation direction helical teeth
The transmission of moment of torsion.
7. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 2, it is characterised in that described sensing device I
(61) include torque speed sensor I(611), vibrating sensor (612), sensor base I(613), described moment of torsion rotating speed pass
Sensor I(611) it is arranged on the power shaft of described Hooks coupling universal coupling test specimen (7), it is used for monitoring the size of input torque and rotating speed；
The support of described vibrating sensor (612) is arranged on described sensor base I(613) on, described sensor base I(613) solid
Dingan County is contained in described testing stand I(11) on, the probe of described vibrating sensor (612) is against described universal with certain gap
On the power shaft of axial organ test specimen (7)；Described sensing device II(62) include torque speed sensor II(621) and sensor base
II(622), described sensor base II(622) it is fixedly mounted on described worm sector dish (81)；Described moment of torsion revolution speed sensing
Device II(621) it is arranged on the output shaft of described Hooks coupling universal coupling test specimen (7), it is used for monitoring output moment of torsion and the size of rotating speed；
Described torque speed sensor I(611 under duty) and described torque speed sensor II(621) described universal for measuring
Shaft coupling test specimen (7) inputs the torque with output shaft and rotating speed size, by the parameter of output with input is compared analysis,
Draw the transmission efficiency of Hooks coupling universal coupling test specimen (7) when there is certain deflection angle；Described vibrating sensor (612) is used for measuring
The described Hooks coupling universal coupling test specimen (7) vibrational state in operation process.
8. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 2, it is characterised in that described rotation angle mechanism (8)
Including worm sector dish (81), worm screw (82), bearing base (83) and servomotor (84), described worm sector dish (81)
Edge is with the axis of guide, and with two universal rolling wheels on the described axis of guide, described universal rolling wheel is in the race of described arcuate groove
Roll；The center of rotation of described worm sector dish (81) uses hinge arrangement and described testing stand II(12) the rotation of arcuate groove
Center connects；The hinge arrangement of described worm sector dish (81) matches with the axis of guide and realizes the flat of described worm sector dish (81)
Steady rotation；The centrage of described worm sector dish (81) is marked with center pointer, and center pointer points to the quarter on described arcuate groove
Angle value is the angle i.e. Hooks coupling universal coupling test specimen power shaft and output shaft that the center of described worm sector dish (81) turns over
Deflection angle；Described bearing base (83) is fixedly mounted on described testing stand II(12) square groove in, described bearing base
Seat (83) supports described worm screw (82), and described worm screw (82) is connected with described servomotor (84)；Described servomotor (84) carries
For power, driving described worm screw (82) to rotate, described worm screw (82) drives described worm sector dish (81) to rotate, the most described fan
The axis of guide of shape worm gear dish (81) is at described testing stand II(12) on arcuate groove in rotate, finally realize described torque loader
(5) smooth rotation, the corner that described rotation angle mechanism (8) realizes is in the range of-45～45；When testing stand is at the angle determined
When degree is tested, described rotation angle mechanism (8) has auto-lock function, it is achieved the safety of test is carried out.
9. a kind of corner-type Hooks coupling universal coupling testing stand as claimed in claim 1, it is characterised in that also comprise a control system
System, described control system controls the rapport of all parts on whole testing stand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620319834.3U CN205679393U (en) | 2016-04-15 | 2016-04-15 | A kind of corner-type Hooks coupling universal coupling testing stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620319834.3U CN205679393U (en) | 2016-04-15 | 2016-04-15 | A kind of corner-type Hooks coupling universal coupling testing stand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205679393U true CN205679393U (en) | 2016-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620319834.3U Expired - Fee Related CN205679393U (en) | 2016-04-15 | 2016-04-15 | A kind of corner-type Hooks coupling universal coupling testing stand |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675298A (en) * | 2016-04-15 | 2016-06-15 | 青岛科技大学 | Corner-type universal coupling test bench |
| CN109540506A (en) * | 2018-11-29 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | A kind of gearbox torsional oscillation testboard bay |
-
2016
- 2016-04-15 CN CN201620319834.3U patent/CN205679393U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105675298A (en) * | 2016-04-15 | 2016-06-15 | 青岛科技大学 | Corner-type universal coupling test bench |
| CN105675298B (en) * | 2016-04-15 | 2018-02-02 | 青岛科技大学 | A kind of corner-type Hooks coupling universal coupling testing stand |
| CN109540506A (en) * | 2018-11-29 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | A kind of gearbox torsional oscillation testboard bay |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20170415 |
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| CF01 | Termination of patent right due to non-payment of annual fee |