CN109724796A - The continuously adjustable spiral bevel gear Power close pilot system of apex to crown - Google Patents
The continuously adjustable spiral bevel gear Power close pilot system of apex to crown Download PDFInfo
- Publication number
- CN109724796A CN109724796A CN201811509498.9A CN201811509498A CN109724796A CN 109724796 A CN109724796 A CN 109724796A CN 201811509498 A CN201811509498 A CN 201811509498A CN 109724796 A CN109724796 A CN 109724796A
- Authority
- CN
- China
- Prior art keywords
- gear
- box
- spiral bevel
- bevel gear
- apex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention belongs to gear transmission technology fields, and in particular to a kind of spiral bevel gear Power close pilot system that apex to crown is continuously adjustable.Comprising: variable-frequency motor, servo motor, torque loading device, speed reducer, main examination gear-box, accompany examination gear-box, torque sensor, closed gear case, flywheel casing, clutch and shaft coupling.The pilot system uses Power close form, main examination gear-box and accompany examination gear-box arrange in pairs, low speed quasi-static test and high speed dynamic test can be carried out, the present invention has widened the function and the scope of application of Power close formula spiral bevel gear pilot system, it can be for spiral bevel gear to dynamic tests such as low speed quasi-static test and vibration detection, boundary temperature such as development transmission error, contact patches using the pilot system, it is suitable for the test demand of spiral bevel gear pair under different apex to crowns, wide adaptation range, and effectively reduce replacement, assembly and debug time and cost.
Description
Technical field
The invention belongs to gear transmission technology fields, and in particular to a kind of spiral bevel gear power that apex to crown is continuously adjustable
Blocking test system.
Background technique
Spiral bevel gear has the characteristics that small impact, low noise, bearing capacity height and stable drive, is widely used in high speed
In heavy-duty drive system, the experimental study for carrying out spiral bevel gear can provide basic data for design, processing and assembly, improve arc
The designing quality of bevel gear.Spiral bevel gear testing stand is different according to the mode that energy converts, and can be divided into the examination of Power close formula
It tests platform and opens power streaming testing stand, Power close formula testing stand simple, small investment, less cost of power with structure,
Revolving speed and torque are two independent control parameters, are used widely in spiral bevel gear experimental study.
Experimental study for spiral bevel gear includes two aspects of low speed quasi-static test and dynamic test, wherein low
Fast quasi-static test mainly for Static transmissions error and contact patch etc. carry out testing research, high speed dynamic test mainly for
Dynamic transmission error, vibration signal and boundary temperature etc. carry out testing research.Existing spiral bevel gear pilot system mainly for
High speed dynamic test conducts a research, it is difficult to take into account quasi-static and two kinds of different types of dynamic test at a high speed the demand of low speed.In addition,
Main examination gear-box in existing spiral bevel gear pilot system/accompany examination gear box structure and support complicated, adapts to different apex to crowns
The range of lower spiral bevel gear test is small, and replaces, time length, the low efficiency of assembly and debugging, and be not easy to maintenance.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is how to provide a kind of spiral bevel gear power envelope that apex to crown is continuously adjustable
Close pilot system, it is desirable that its function and the scope of application that can widen Power close formula spiral bevel gear pilot system, to realize
For spiral bevel gear to low speed quasi-static test and vibration detections, boundary temperature such as development Static transmissions error, contact patches
Etc. dynamic tests, and, it is desirable that it meets under a wide range of apex to crown the needs of spiral bevel gear is tested, and effectively reduce replacement,
The time and cost of assembly and debugging.
(2) technical solution
In order to solve the above technical problems, the present invention provides a kind of spiral bevel gear Power close examination that apex to crown is continuously adjustable
Check system, the system comprises: variable-frequency motor 1, torque loading device 5, main examination gear-box 7, accompanies examination gear at closed gear case 3
Case 9, torque sensor 11, flywheel casing 12, clutch 14, speed reducer 15 and servo motor 16;
Wherein, the variable-frequency motor 1 and torque loading device 5 are coaxially arranged;
The variable-frequency motor 1 and 3 rightmost side gear axis connection of closed gear case, 3 rightmost side gear shaft of closed gear case with
Torque loading device 5 connects, and torque loading device 5 is connect with main examination gear-box 7;
Main examination gear-box 7 is arranged in pairs with examination gear-box 8 is accompanied, and main examination gear-box 7 is connect with examination gear-box 8 is accompanied;
It accompanies examination gear-box 9 to connect with flywheel casing 12, and accompanies and torque sensor is installed between examination gear-box 9 and flywheel casing 12
11;
Flywheel casing 12 and 3 leftmost side gear axis connection of closed gear case, 3 leftmost side gear shaft of closed gear case and clutch
Structure 14, speed reducer 15 and servo motor 16 are coaxially arranged;
Servo motor 16 is connect with speed reducer 15, and speed reducer 15 passes through clutch 14 and 3 leftmost side tooth of closed gear case
Take turns axis connection.
Wherein, the variable-frequency motor 1 and servo motor 16 are arranged in parallel, and variable-frequency motor 1 and servo motor 16 respectively with
3 two sides gear axis connection of closed gear case;
In low speed quasi-static test, clutch 14 is in bonding state, by servo motor 16, speed reducer 15 and torque
5 drive load of loader, for carrying out the slow-speed test including contact patch, Static transmissions error;
In high speed dynamic test, clutch 14 is in discrete state, is driven by variable-frequency motor 1 and torque loading device 5
Dynamic load, for carrying out the high-speed test (HST) including dynamic transmission error, vibration signal and boundary temperature.
Wherein, the master accompanies examination gear-box 7 and accompanies in examination gear-box 9, spiral bevel gear, transmission shaft, bearing and bearing block
Using integrated design, spiral bevel gear and transmission shaft are connected by hydraulic expansion mode, and cantilever support main examination gear-box/
On the cabinet for accompanying examination gear-box, for adapting to the test demand of spiral bevel gear pair under different apex to crowns.
Wherein, the system also includes first shaft couplings 2;
The variable-frequency motor 1 passes through first shaft coupling 2 and 3 rightmost side gear axis connection of closed gear case.
Wherein, the system also includes second shaft couplings 4;
3 rightmost side gear shaft of closed gear case is connect by second shaft coupling 4 with torque loading device 5.
Wherein, the system also includes third shaft couplings 6;
The torque loading device 5 is connect by third shaft coupling 6 with main examination gear-box 7.
Wherein, the system also includes the 4th shaft couplings 8;
The main examination gear-box 7 and accompany examination gear-box 8 between by the 4th shaft coupling 8 connect.
Wherein, the system also includes the 5th shaft couplings 10;
It is described that examination gear-box 9 is accompanied to connect by the 5th shaft coupling 10 with flywheel casing 12, the 5th shaft coupling 10 and flywheel casing 12
Between install torque sensor 11.
Wherein, the system also includes the 6th shaft couplings 13;
The flywheel casing 12 passes through the 6th shaft coupling 13 and 3 leftmost side gear axis connection of closed gear case.
(3) beneficial effect
Compared with prior art, the present invention have it is following the utility model has the advantages that
(1) present invention is arranged in parallel by using variable-frequency motor and servo motor, variable-frequency motor and servo motor respectively with
Closed gear case two sides gear axis connection, clutch is in bonding state when low speed quasi-static test, by servo motor, slows down
Machine and torque loader drive load, when high speed dynamic test, clutch is in discrete state, is added by variable-frequency motor and torque
It carries and sets drive load.
(2) present invention is main accompanies examination gear-box and spiral bevel gear, transmission shaft, bearing and bearing block etc. in examination gear-box is accompanied to adopt
With integrated design, and spiral bevel gear and transmission shaft are connected by hydraulic expansion mode, and cantilever support main examination gear-box/
On the cabinet for accompanying examination gear-box, the apex to crown for meeting the spiral bevel gear pair in main examination gear-box/accompany examination gear-box is continuously adjustable,
It is suitable for the test demand of spiral bevel gear pair under different apex to crowns, effectively reduces replacement, assembly and debug time, adaptation range
Extensively.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of technical solution of the present invention.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to of the invention
Specific embodiment is described in further detail.
To solve prior art problem, the present invention provides a kind of spiral bevel gear Power close examination that apex to crown is continuously adjustable
Check system, as shown in Figure 1, including variable-frequency motor 1, first shaft coupling 2, closed gear case 3, second shaft coupling 4, torque load dress
It sets 5, third shaft coupling 6, main examination gear-box 7, the 4th shaft coupling 8, accompany examination gear-box 9, the 5th shaft coupling 10, torque sensor
11, flywheel casing 12, the 6th shaft coupling 13, clutch 14, speed reducer 15 and servo motor 16.Variable-frequency motor 1 and torque load
Device 5 is coaxially arranged, and variable-frequency motor 1 passes through first shaft coupling 2 and 3 rightmost side gear axis connection of closed gear case, closed gear
Case 3 is connect by second shaft coupling 4 with torque loading device 5, and torque loading device 5 passes through third shaft coupling 6 and main examination gear
Case 7 connects, and main examination gear-box 7 is arranged in pairs with examination gear-box 8 is accompanied, and main examination gear-box 7 and accompanies and tries to pass through the 4th between gear-box 8
Shaft coupling 8 connects, and examination gear-box 9 is accompanied to be connect with flywheel casing 12 by five shaft couplings 10, the 5th shaft coupling 10 and flywheel casing 12 it
Between torque sensor 11 is installed, flywheel casing 12 passes through the 6th shaft coupling 13 and 3 leftmost side gear axis connection of closed gear case, closing
3 leftmost side gear shaft of gear-box and clutch 14, speed reducer 15 and servo motor 16 are coaxially arranged, servo motor 16 and deceleration
Machine 15 connects, and speed reducer 15 passes through clutch 14 and 3 leftmost side gear axis connection of closed gear case.
As shown in Figure 1, being arranged in parallel using variable-frequency motor 1 and servo motor 16, variable-frequency motor 1 and servo motor 16 are distinguished
With 3 two sides gear axis connection of closed gear case, clutch 14 is in bonding state when low speed quasi-static test, by servo motor
16,5 drive load of speed reducer 15 and torque loader, can carry out the slow-speed tests such as contact patch, Static transmissions error, Gao Sudong
When state is tested, clutch 14 is in discrete state, by 5 drive load of variable-frequency motor 1 and torque loading device, can carry out dynamic
The high-speed test (HST)s such as transmission error, vibration signal and boundary temperature.
Wherein, main to accompany examination gear-box 7 and spiral bevel gear, transmission shaft, bearing and bearing block etc. in examination gear-box 9 is accompanied to use
Integrated design, spiral bevel gear and transmission shaft are connected by hydraulic expansion mode, and cantilever support is in master/accompany examination gear-box
On cabinet, it is suitable for the test demand of spiral bevel gear pair under different apex to crowns, wide adaptation range can effectively reduce replacement, dress
With with debug time and cost.
To sum up, pilot system provided by the present invention use Power close form, main examination gear-box and accompany try gear-box at
To arrangement, low speed quasi-static test and high speed dynamic test can be carried out, wherein low speed quasi-static test is combined by clutch
Servo motor and speed reducer, by servomotor, gear reducer and torque loader drive load, high speed dynamic test passes through clutch
Structure disconnects servo motor and speed reducer, and by variable-frequency motor and torque loader drive load.Main examination gear-box/accompany examination gear-box
Using integrated design, spiral bevel gear and transmission shaft are connected by hydraulic expansion mode, and cantilever support main examination gear-box/
On the cabinet for accompanying examination gear-box, the apex to crown for meeting the spiral bevel gear pair in main examination gear-box/accompany examination gear-box is continuously adjustable,
It is suitable for the test demand of spiral bevel gear pair under different apex to crowns.The present invention has widened the test of Power close formula spiral bevel gear
The function and the scope of application of system, can be for spiral bevel gear to development transmission error, contact patch etc. using the pilot system
The dynamic tests such as low speed quasi-static test and vibration detection, boundary temperature are suitable for spiral bevel gear pair under different apex to crowns
Test demand, wide adaptation range, and effectively reduce replacement, assembly and debug time and cost.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of continuously adjustable spiral bevel gear Power close pilot system of apex to crown, which is characterized in that the system comprises:
Variable-frequency motor (1), torque loading device (5), main examination gear-box (7), accompanies examination gear-box (9), torque to pass at closed gear case (3)
Sensor (11), flywheel casing (12), clutch (14), speed reducer (15) and servo motor (16);
Wherein, the variable-frequency motor (1) and torque loading device (5) are coaxially arranged;
The variable-frequency motor (1) and closed gear case (3) rightmost side gear axis connection, closed gear case (3) rightmost side gear shaft
It is connect with torque loading device (5), torque loading device (5) is connect with main examination gear-box (7);
Main examination gear-box (7) is arranged in pairs with examination gear-box (8) is accompanied, and main examination gear-box (7) connect with examination gear-box (8) is accompanied;
It accompanies examination gear-box (9) to connect with flywheel casing (12), and accompanies and torque sensing is installed between examination gear-box (9) and flywheel casing (12)
Device (11);
Flywheel casing (12) and closed gear case (3) leftmost side gear axis connection, closed gear case (3) leftmost side gear shaft and clutch
Mechanism (14), speed reducer (15) and servo motor (16) are coaxially arranged;
Servo motor (16) is connect with speed reducer (15), and speed reducer (15) passes through clutch (14) and closed gear case (3) most
Left side gear axis connection.
2. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The variable-frequency motor (1) and servo motor (16) parallel arrangement, and variable-frequency motor (1) and servo motor (16) respectively with close tooth
Roller box (3) two sides gear axis connection;
In low speed quasi-static test, clutch (14) is in bonding state, by servo motor (16), speed reducer (15) and turns round
Square loader (5) drive load, for carrying out the slow-speed test including contact patch, Static transmissions error;
In high speed dynamic test, clutch (14) is in discrete state, by variable-frequency motor (1) and torque loading device (5)
Drive load, for carrying out the high-speed test (HST) including dynamic transmission error, vibration signal and boundary temperature.
3. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The master accompanies examination gear-box (7) and accompanies in examination gear-box (9), and spiral bevel gear, transmission shaft, bearing and bearing block are using integration
Design, spiral bevel gear and transmission shaft connected by hydraulic expansion mode, and cantilever support is in main examination gear-box/accompany examination gear-box
Cabinet on, for adapting to the test demand of spiral bevel gear pair under different apex to crowns.
4. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The system also includes first shaft coupling (2);
The variable-frequency motor (1) passes through first shaft coupling (2) and closed gear case (3) rightmost side gear axis connection.
5. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The system also includes second shaft coupling (4);
Closed gear case (3) rightmost side gear shaft is connect by second shaft coupling (4) with torque loading device (5).
6. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The system also includes third shaft coupling (6);
The torque loading device (5) is connect by third shaft coupling (6) with main examination gear-box (7).
7. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The system also includes the 4th shaft couplings (8);
The main examination gear-box (7) is connect by the 4th shaft coupling (8) with accompanying between examination gear-box (8).
8. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The system also includes the 5th shaft couplings (10);
It is described that examination gear-box (9) is accompanied to connect by the 5th shaft coupling (10) with flywheel casing (12), the 5th shaft coupling (10) and flywheel
Torque sensor (11) are installed between case (12).
9. the continuously adjustable spiral bevel gear Power close pilot system of apex to crown as described in claim 1, which is characterized in that
The system also includes the 6th shaft couplings (13);
The flywheel casing (12) passes through the 6th shaft coupling (13) and closed gear case (3) leftmost side gear axis connection.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811509498.9A CN109724796A (en) | 2018-12-11 | 2018-12-11 | The continuously adjustable spiral bevel gear Power close pilot system of apex to crown |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811509498.9A CN109724796A (en) | 2018-12-11 | 2018-12-11 | The continuously adjustable spiral bevel gear Power close pilot system of apex to crown |
Publications (1)
Publication Number | Publication Date |
---|---|
CN109724796A true CN109724796A (en) | 2019-05-07 |
Family
ID=66294895
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811509498.9A Pending CN109724796A (en) | 2018-12-11 | 2018-12-11 | The continuously adjustable spiral bevel gear Power close pilot system of apex to crown |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109724796A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110864898A (en) * | 2019-10-28 | 2020-03-06 | 浙江大学 | High-power bevel gear comprehensive performance test bed capable of being quickly replaced and assembled |
CN113203562A (en) * | 2021-04-19 | 2021-08-03 | 中国航发湖南动力机械研究所 | Gear dynamic stress measuring system |
CN113418671A (en) * | 2021-05-11 | 2021-09-21 | 中国船舶重工集团公司第七0三研究所 | Drop-out type gear box impact test bed and test method thereof |
CN113418697A (en) * | 2021-08-07 | 2021-09-21 | 西北工业大学 | Multifunctional spiral bevel gear experiment table |
CN114279702A (en) * | 2021-11-18 | 2022-04-05 | 太原重工轨道交通设备有限公司 | Load test device for gear transmission system of rail engineering vehicle |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007040106A1 (en) * | 2007-08-24 | 2009-02-26 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Mobile torque calibration device for e.g. engine dynamometer, has sensor subjected with reference torque sensor by calibration torque, where electric motor is arranged on frame of carriage |
CN101957260A (en) * | 2010-06-23 | 2011-01-26 | 国营武汉长虹机械厂 | Closed type comprehensive test device for high-power gearbox machinery |
CN202994465U (en) * | 2012-12-28 | 2013-06-12 | 四川诚邦测控技术有限公司 | Double-change gearbox test system for engineering machinery |
CN103234747A (en) * | 2013-03-28 | 2013-08-07 | 浙江大学 | Test stand capable of adjusting installation errors for comprehensive performance of spiral bevel gears |
CN105458317A (en) * | 2015-12-02 | 2016-04-06 | 四川凌峰航空液压机械有限公司 | Hydraulic tensioning clamping mandrel for thin-wall shaft sleeve |
CN107588951A (en) * | 2017-09-23 | 2018-01-16 | 吉林大学 | A kind of low-temperature test platform of two casees face-to-face synchronous belt power closed loop compensation drivings |
-
2018
- 2018-12-11 CN CN201811509498.9A patent/CN109724796A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007040106A1 (en) * | 2007-08-24 | 2009-02-26 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Mobile torque calibration device for e.g. engine dynamometer, has sensor subjected with reference torque sensor by calibration torque, where electric motor is arranged on frame of carriage |
CN101957260A (en) * | 2010-06-23 | 2011-01-26 | 国营武汉长虹机械厂 | Closed type comprehensive test device for high-power gearbox machinery |
CN202994465U (en) * | 2012-12-28 | 2013-06-12 | 四川诚邦测控技术有限公司 | Double-change gearbox test system for engineering machinery |
CN103234747A (en) * | 2013-03-28 | 2013-08-07 | 浙江大学 | Test stand capable of adjusting installation errors for comprehensive performance of spiral bevel gears |
CN105458317A (en) * | 2015-12-02 | 2016-04-06 | 四川凌峰航空液压机械有限公司 | Hydraulic tensioning clamping mandrel for thin-wall shaft sleeve |
CN107588951A (en) * | 2017-09-23 | 2018-01-16 | 吉林大学 | A kind of low-temperature test platform of two casees face-to-face synchronous belt power closed loop compensation drivings |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110864898A (en) * | 2019-10-28 | 2020-03-06 | 浙江大学 | High-power bevel gear comprehensive performance test bed capable of being quickly replaced and assembled |
CN110864898B (en) * | 2019-10-28 | 2020-10-16 | 浙江大学 | High-power bevel gear comprehensive performance test bed capable of being quickly replaced and assembled |
CN113203562A (en) * | 2021-04-19 | 2021-08-03 | 中国航发湖南动力机械研究所 | Gear dynamic stress measuring system |
CN113418671A (en) * | 2021-05-11 | 2021-09-21 | 中国船舶重工集团公司第七0三研究所 | Drop-out type gear box impact test bed and test method thereof |
CN113418697A (en) * | 2021-08-07 | 2021-09-21 | 西北工业大学 | Multifunctional spiral bevel gear experiment table |
CN113418697B (en) * | 2021-08-07 | 2023-07-14 | 西北工业大学 | Multifunctional spiral bevel gear experiment table |
CN114279702A (en) * | 2021-11-18 | 2022-04-05 | 太原重工轨道交通设备有限公司 | Load test device for gear transmission system of rail engineering vehicle |
CN114279702B (en) * | 2021-11-18 | 2024-04-16 | 太原重工轨道交通设备有限公司 | Load test device for gear transmission system of track engineering vehicle |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109724796A (en) | The continuously adjustable spiral bevel gear Power close pilot system of apex to crown | |
CN206593852U (en) | Circulating power flow pattern RV decelerator dynamic-performance testing tables | |
CN203009454U (en) | Hydraulic comprehensive test bed | |
CN202562735U (en) | Crane brake dynamic testing bench | |
CN204788929U (en) | Slewing bearing test bench | |
CN205262736U (en) | Multistage planetary gear case combined test platform | |
CN204944836U (en) | A kind of clutch brake testing table adopting Hydraulic Elements fictitious load | |
CN102840978A (en) | Megawatt level mechanical total power sealed gear test-bed | |
CN206601234U (en) | A kind of closed Hooks coupling universal coupling testing stand | |
CN103604604A (en) | Device for fault simulation of gear transmission case of wind turbine | |
CN203616125U (en) | Closed transmission system of automobile drive axle performance testing stand | |
CN204269362U (en) | The pneumatically loading ball screw assembly, dynamic efficiency testing table of interchangeable leading screw | |
CN205157179U (en) | Take big moment of torsion inertia brake test device of low -speed of reduction gear | |
CN208795497U (en) | Land leveller rotary gear box is positive and negative to drive self-locking table apparatus | |
CN201348594Y (en) | Testing system of friction testing machine | |
CN201392262Y (en) | Fatigue strength tester for brake | |
CN204142477U (en) | Rocker arm of coal mining machine load testing machine | |
CN202229868U (en) | Testing machine for suction lifting force of lifting permanent magnet | |
CN207622903U (en) | A kind of shearing valve type mud pulse generator torque testing table | |
CN204731023U (en) | A kind of reductor adds the running test platform of load | |
CN204425127U (en) | The two-way speed-measuring structure that motor high reliability tests the speed | |
CN203275085U (en) | Gearbox and central transmission test bench | |
CN204575328U (en) | The test macro of checking engine PTO fan-out capability | |
CN203412847U (en) | Loading device suitable for low-speed high-torque hydraulic motor testing system | |
CN104502098B (en) | General bevel gear box mechanical close formula testing stand |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190507 |
|
RJ01 | Rejection of invention patent application after publication |