CN205719360U - Taper roll bearing friction torque measures stand - Google Patents
Taper roll bearing friction torque measures stand Download PDFInfo
- Publication number
- CN205719360U CN205719360U CN201620563483.0U CN201620563483U CN205719360U CN 205719360 U CN205719360 U CN 205719360U CN 201620563483 U CN201620563483 U CN 201620563483U CN 205719360 U CN205719360 U CN 205719360U
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- Prior art keywords
- bearing
- friction torque
- taper roll
- main shaft
- angular contact
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Abstract
A kind of taper roll bearing friction torque measures stand, including: drive motor, drive shaft, measured circle taper roller bearing, test main shaft, bearing test main shaft drives main shaft between and coaxially arranged, test main shaft is provided with hydraulic cylinder and piston provides axial compressive force, the periphery of test lead is disposed with friction torque sensor, and arrange in the outside of bearing vertically, pass through axial compressive force, and test main shaft and drive shaft are rotationally connected, friction torque sensor realizes taper roll bearing friction torque and measures, and its simple in construction, data are the most reliable.
Description
Technical field
This utility model is about a kind of test desk rack device, especially for taper roll bearing friction torque test desk
Frame.
Background technology
In China bearing and test industry thereof, possess some and can survey radial antifriction bearing and (do not include taper roller
Bearing) device of friction torque, but substantially do not have the surveyed taper roll bearing of ripe application in axially different load and not
Testing machine or stand with the friction torque under speed conditions.
Due to the particularity (Internal and external cycle separate type and there is contact angle) of taper roll bearing structural shape, therefore in test
Some load transfer devices of special setting are needed to provide certain axial load, so that bearing to be carried out during the friction torque of taper roll bearing
Axially fasten, or realize simulating the purpose of its real working condition.And in China bearing and test industry thereof, there is no ripe should
The testing machine of realized above-mentioned functions or stand.
Therefore, need to solve the difficulty in above-mentioned China bearing and test industry thereof in the association areas such as testboard bay
Topic, it is provided that a kind of taper roll bearing friction torque dress realizing measuring under axially different load and different rotating speeds operating mode
Put, also can realize measuring the friction torque of other radial antifriction bearings.
A kind of taper roll bearing friction measured under axially different load and different rotating speeds operating mode to be specifically provided
The stand of moment of torsion, including taper roll bearing static friction moment of torsion (also known as starting torque, i.e. bearing from static to start time
Friction torque) and dynamic friction moment of torsion (i.e. friction torque during bearing rotary).
Utility model content
This utility model provides a kind of taper roll bearing friction torque to measure stand, to solve of the prior art asking
Topic, simplifies structure, improves data reliability.
This utility model provides a kind of taper roll bearing friction torque and measures stand, including: drive motor, drive master
Axle, measured circle taper roller bearing, test main shaft, described driving motor drives described drive shaft to rotate, and described tested circular cone rolls
Sub-bearing between the test lead and the drive end of described drive shaft of described test main shaft coaxially arranged and with described test
Main shaft and described drive shaft are rotationally connected, wherein:
The pressure end of described test main shaft is provided with hydraulic cylinder, and the piston of described hydraulic cylinder provides axially along described test main shaft
Pressure, is disposed with friction torque sensor on the periphery of described test lead, and described friction torque sensor is vertically in institute
The outside stating measured circle taper roller bearing is arranged.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: at described piston and described
Also there is between pressure end pressure transducer.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described drive end has recessed
Chamber, the outer ring of described measured circle taper roller bearing coordinates with described cavity, in outer ring and the institute of described measured circle taper roller bearing
State and also there is between cavity tested cone bearing outer ring mounting seat.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described tested taper roller
The inner ring of bearing coordinates with described test lead, and described test lead has shoulder, at described shoulder and described tested taper roller
Adjustment back-up ring axially it is disposed with between bearing.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described pressure end also has
Have: high-speed liquid hydrostatic bearing that periphery is arranged and the static pressure that is disposed axially between described pressure end and described pressure transducer
The axial locating piece of bearing.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described hydrostatic bearing is axial
Locating piece has front end plush copper, and described front end plush copper is screw thread or cylinder；Described pressure end has shrinkage pool；Described front end plush copper with
Described shrinkage pool is connected；And the described axial locating piece of hydrostatic bearing is to described high-speed liquid hydrostatic bearing axial limiting.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described drive shaft is along axle
To being provided with drive end angular contact ball bearing and connecting end angular contact ball bearing, in described drive end angular contact ball bearing and described company
Connect and there is between end angular contact ball bearing positioning spacer and realize axially location, and along drive shaft periphery, there is main shaft shell,
To accommodate described drive end angular contact ball bearing and described connection end angular contact ball bearing.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described driving motor percutaneous
Being connected with described drive shaft by positive coupling after belt wheel speed change gear, described belt pulley speed change gear includes driving with described
The small belt pulley that galvanic electricity machine is connected, and the big belt pulley by described small belt pulley belt drives, and the output of described big belt pulley
End axis and described drive shaft connect between end axis the axiality after described positive coupling connects φ 0.05 it
In；And the dynamic radial at the described connection end of described drive shaft beats within 0.05.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described drive end angular contact
Ball bearing and the angular contact ball bearing that described connection end angular contact ball bearing is a pair back-to-back configuration, bearing axially simultaneously and
Joint load radially；And described angular contact ball bearing is dual face seals pattern, interior note grease, to realize self-lubricating；Described
The Internal and external cycle of angular contact ball bearing realizes radially location by drive shaft and main shaft shell.
Taper roll bearing friction torque as above measures stand, these, it is preferred to: described high-speed liquid static pressure
Bearing is that it connects external hydraulic system, by circumferentially disposed oilhole by being externally supplied pressure oil, in institute without circumference oil-return type
State Bearing inner and set up static pressure carrying oil film to realize hydrodynamic lubrication, and realize circumference by the oil pressure of oil pocket and support described test
The rotation of main shaft.
This utility model (is completed stand by hydraulic drive piston 19, hydraulic cylinder 20 by axially applying piston pressure
In measured bearing apply the effect of axial load), and test main shaft and drive shaft be rotationally connected, and outside test lead
Being disposed with friction torque sensor on week and realize the measurement of taper roll bearing friction torque, simple in construction, data are the most reliable.
Accompanying drawing explanation
Fig. 1 assembly axle side schematic diagram；
Fig. 2 assembly axle sectional side view；With
Fig. 3 assembly section plan.
Reference: 1 drives motor, 2 small belt pulleys, 3 belts, 4 big belt pulleys, 5 shaft couplings, 6 drive shaft, 7 connections
End angular contact ball bearing, 8 drive end angular contact ball bearings, 9 positioning spacers, 10 main shaft shell, 11 tested cone bearing outer rings are installed
Seat, 12 measured circle taper roller bearings, 13 adjustment back-up rings, 14 friction torque sensors, 15 test main shaft, 16 high-speed liquid static pressure axles
Hold, the 17 axial locating pieces of hydrostatic bearing, 18 pressure transducers, 19 hydraulic drive piston, 20 hydraulic cylinders, 31 connect ends, 32 drive
End, 33 test leads, 34 pressure end.
Detailed description of the invention
As shown in Figures 1 to 3, this utility model one taper roll bearing friction torque measures stand, including: drive motor
1, drive shaft 6, measured circle taper roller bearing 12, test main shaft 15, described driving motor 1 drives described drive shaft 6 to rotate,
Described measured circle taper roller bearing 12 be positioned at the test lead 33 of described test main shaft 15 and described drive shaft 6 drive end 32 it
Between coaxially arranged and be rotationally connected, wherein with described test main shaft 15 and described drive shaft 6:
The pressure end 34 of described test main shaft 15 is provided with hydraulic cylinder 20, and the piston 19 of described hydraulic cylinder 20 is main along described test
Axle 15 provides axial compressive force, is disposed with friction torque sensor 14, and described friction torque on the periphery of described test lead 33
Sensor 14 is arranged in the outside of described measured circle taper roller bearing 12 vertically.
This utility model (is completed stand by hydraulic drive piston 19, hydraulic cylinder 20 by axially applying piston pressure
In measured bearing apply the effect of axial load), and test main shaft and drive shaft be rotationally connected, and outside test lead
Being disposed with friction torque sensor on week and realize the measurement of taper roll bearing friction torque, simple in construction, data are the most reliable.
As an improvement of the present utility model, between described piston 19 and described pressure end 34, also there is pressure sensing
Device 18.
As an improvement of the present utility model, described drive end 32 has cavity, described measured circle taper roller bearing 12
Outer ring coordinate with described cavity, between the outer ring and described cavity of described measured circle taper roller bearing 12, also there is tested cone
Bearing outer ring mounting seat 11, to realize location radially and restriction.As improving further, described measured circle taper roller bearing 12
Inner ring coordinate with described test lead 33, and described test lead 33 has shoulder, at described shoulder and described tested taper roller
Adjustment back-up ring 13 axially it is disposed with, to realize axial location and restriction between bearing 12.
As an embodiment of the present utility model, described pressure end 34 also has: the high-speed liquid static pressure that periphery is arranged
Bearing 16, and the axial locating piece of hydrostatic bearing 17 being disposed axially between described pressure end 34 and described pressure transducer 18.
As further improving, the axial locating piece of described hydrostatic bearing 17 has front end plush copper, and described front end plush copper is screw thread or circle
Post；Described pressure end has shrinkage pool；Described front end plush copper is connected with described shrinkage pool；And the described axial locating piece of hydrostatic bearing
17 pairs of described high-speed liquid hydrostatic bearing 16 axial limitings.
As an embodiment of the present utility model, described drive shaft 6 is provided with drive end angular contact ball bearing 8 vertically
With connect end angular contact ball bearing 7, between described drive end angular contact ball bearing 8 and described connection end angular contact ball bearing 7
There is positioning spacer 9 and realize axially location, and along drive shaft 6 periphery, there is main shaft shell 10, to accommodate described drive end
Angular contact ball bearing 8 and described connection end angular contact ball bearing 7.As further improving, described drive end angular contact ball axle
Hold 8 and angular contact ball bearing that described connection end angular contact ball bearing 7 is a pair back-to-back configuration, to bear axially and footpath simultaneously
To joint load；And described angular contact ball bearing is dual face seals pattern, interior note grease, to realize self-lubricating；Described angle
The Internal and external cycle of contact ball bearing is by the existing radially location of drive shaft 6 and main shaft shell real 10.In the present embodiment a pair back to
The angular contact ball bearing of back of the body configuration not only completes to bear the effect of axial load, the problem simultaneously solving self-lubrication.
Those skilled in the art can use other radially, axially according to the inspiration of the content disclosed in this utility model
Location and supporting arrangement and parts, to realize the location in this utility model apparatus structure and supporting functions.
As another embodiment of the present utility model, described driving motor 1 is joined by rigidity after belt pulley speed change gear
Axial organ 5 is connected with described drive shaft 6, and described belt pulley speed change gear includes the small belt pulley being connected with described driving motor 1
2, and the big belt pulley 4 driven by described small belt pulley 2 belt 3, and the outfan axis of described big belt pulley 4 and described driving
Between connection end 31 axis of main shaft 6, the axiality after described positive coupling 5 connects is within φ 0.05；And described driving
Dynamic radial at the described connection end 31 of main shaft 6 is beated within 0.05.
As another embodiment of the present utility model, described high-speed liquid hydrostatic bearing 16 is without circumference oil-return type, and it is even
Connect external hydraulic system, by circumferentially disposed oilhole by being externally supplied pressure oil, set up static pressure carrying at described Bearing inner
Oil film is to realize hydrodynamic lubrication, and is realized the rotation of the circumference described test main shaft 15 of support by the oil pressure of oil pocket.
Illustrate and point out:
For the technical characteristic in this utility model and scheme, make as described below and prompting, not directly at scheme mould
Type embodies, but those skilled in the art can be through the description below and prompting and combine the technical solution of the utility model and understand completely
The corresponding technique effect of acquisition:
1, the parts involved by this utility model need and having that ground or other platforms are fixedly connected: drive electricity
Machine 1, small belt pulley 2, big belt pulley 4, main shaft shell 10, high-speed liquid hydrostatic bearing 16, hydraulic cylinder 20；
2, tested cone bearing outer ring mounting seat 11 act as mate tested cone bearing outer ring and drive shaft 6, therefore root
According to the dimensions of tested cone bearing, the size of these parts also can adjust accordingly；
3, adjust back-up ring 13 act as tested cone bearing 12 is carried out axially adjustable and location, therefore according to the tested axis of cone
The dimensions held, the size of these parts also can adjust accordingly；
4, motor 1, friction torque sensor 14, high-speed liquid hydrostatic bearing 16, pressure transducer 18, hydraulic cylinder 20 are driven
It is both needed to connect necessary computer or electric, hydraulic control system, to ensure the normal work of said apparatus, owing to this is general knowledge
Sex knowledge, therefore this utility model does not carry out special description for this；
5, the pressure range of hydraulic cylinder 20 is designed as 0～10000N, can substantially cover common cone bearing at change speed gear box or
The axial force born in other actuating devices or pretightning force；
6, this utility model proposes the highest requirement to the precision of friction torque sensor 14, needs to reach dividing of 0.05Nm
Distinguish precision, its purpose is to ensure that the cone bearing friction torque recorded under the least responsive to axial force is reported as precisely as possible；
7, as the rotating speed rpm≤500r/min of measured circle taper roller bearing 12, and during the t duration of runs≤1min, can be in peace
Only carry out measured circle taper roller bearing 12 during dress precoating oil processing；
8, as the rotating speed rpm >=500r/min of measured circle taper roller bearing 12, or during the t duration of runs >=1min, the most necessary
Testboard bay additionally increases spray bar, carries out injection lubrication when measured bearing operates.
Those skilled in the art, according to announcement of the present utility model, obviously can derive based on design and thinking
The other types measured radial antifriction bearing friction torque test-bed, change hydrodynamic journal liquid polymers detail structure
But the deformation design of the said function application in similar stand is realized.
The use of device:
The test philosophy of stand assembly and method are divided into the following steps:
1, according to the dimensions of measured circle taper roller bearing 12, adjust and make the tested cone bearing outer ring of package size
Mounting seat 11, adjustment back-up ring 13, it is ensured that measured circle taper roller bearing 12 can be installed to testboard bay smoothly；
2, gantry components assembles and checks, the pre-oiling of measured circle taper roller bearing 12, axiality between each operating shaft system and
Dynamic radial is beated inspection, it is ensured that indices is qualified；
3, drive hydraulic drive piston 19 by hydraulic cylinder 20, apply 50N axial compressive force and act on tested circular cone Roller Shaft
Holding 12, the size of power passes through pressure transducer 18 reading；
4, control high-speed liquid hydrostatic bearing 16, be externally supplied pressure oil to the pressure set by control；
5, drive hydraulic drive piston 19 by hydraulic cylinder 20, continue to axial compressive force to setting value Fa；
6, start driving motor 1, drive small belt pulley 2, and by belt 3, big belt pulley 4 and shaft coupling 5, and then drive
Drive shaft 6 rotates, and by controlling to drive the rotating speed of motor 1, makes drive shaft 6 reach setting speed n；
If 7 rotating speeds and the duration of runs are too high, measured circle taper roller bearing 12 is entered by the playpipe that need to start extra increase
Row injection lubrication；
8, by friction torque sensor 14 and its signal collecting device, record in external computer installation and preserve
Process friction torque data and time dependent curve thereof；
9, after completing test according to setting axial load, rotating speed, time, shut down；
10, tested, torn machine frame and parts open.
This utility model achieves provides a kind of circular cone measured under axially different load and different rotating speeds operating mode rolling
Sub-bearing friction torque device, also can measure the friction torque of other radial antifriction bearings.Concrete offer one can be measured not
The stand of the taper roll bearing friction torque under coaxial load and different rotating speeds operating mode, including the static state of taper roll bearing
(bearing revolves for friction torque (also known as starting torque, i.e. bearing from static to friction torque when starting) and dynamic friction moment of torsion
Friction torque when turning).
Beneficial effect:
1. the equipment that this utility model is common in current little medium-sized testboard bay industry is (such as motor, belt pulley, driving
Axle, hydraulic cylinder) under premise, by reasonably combination and the special applications of new product, it is mainly reflected in angular contact ball bearing and height
The application of speed hydrodynamic journal liquid polymers, it is proposed that a kind of novel uniqueness, the small-sized testboard bay scheme of reasonable；Extensively
Kinds of bearings in, angular contact ball bearing and high-speed liquid hydrostatic bearing are provided with high running accuracy and extremely low friction and damage
Losing, additionally hydrodynamic journal liquid polymers work from start to stopping all the time under hydrodynamic lubrication, not abrasion, and starting power is little, in pole
Also can apply under low speed.So the spin friction of angular contact ball bearing and high-speed liquid hydrostatic bearing is permissible in testboard bay
Substantially ignoring, this is also from the accuracy of the friction torque test result that largely ensure that taper roll bearing, and
Reduce the impact on measured circle taper roller bearing of the testboard bay rotating accuracy to big degree；
2. the testboard bay that this utility model relates to, can be to taper roll bearing (axial carrying/turn under different operating modes
Speed) friction torque measure and record；Drive process control and signal acquiring system by motor, can obtain completely by
Survey taper roll bearing static state (starting) friction torque when starting and run well and dynamic friction moment of torsion；Single for assessment
Body bearing friction merit and efficiency have the highest effect and precision；
3. the testboard bay involved by this utility model, can simulate taper roll bearing in change speed gear box or reduction box
Various actual conditions, measure monomer cone bearing operation friction merit, and the friction loss assessment to the contribution of change speed gear box inner bearing possesses
The most directly perceived and believable foundation.
Should be appreciated that this utility model scope of the claimed is not limited to non-limiting embodiments, it should be understood that non-limiting reality
Scheme of executing illustrates as just example.The protection domain of the essence that the application is to be required more is embodied in independent claims
The scope provided, and its dependent claims.
Claims (10)
1. taper roll bearing friction torque measures a stand, including: drive motor, drive shaft, tested circular cone Roller Shaft
Holding, test main shaft, described driving motor drives described drive shaft to rotate, and described measured circle taper roller bearing is positioned at described test
Between test lead and the drive end of described drive shaft of main shaft coaxially arranged and with described test main shaft and described drive shaft
It is rotationally connected, it is characterised in that:
The pressure end of described test main shaft is provided with hydraulic cylinder, and the piston of described hydraulic cylinder provides axially pressure along described test main shaft
Power, is disposed with friction torque sensor on the periphery of described test lead, and described friction torque sensor is vertically described
The outside of measured circle taper roller bearing is arranged.
2. taper roll bearing friction torque as claimed in claim 1 measures stand, it is characterised in that: in described piston and institute
State and also there is between pressure end pressure transducer.
3. taper roll bearing friction torque as claimed in claim 1 measures stand, it is characterised in that: described drive end has
Cavity, the outer ring of described measured circle taper roller bearing coordinates with described cavity, the outer ring of described measured circle taper roller bearing with
Also there is between described cavity tested cone bearing outer ring mounting seat.
4. taper roll bearing friction torque as claimed in claim 3 measures stand, it is characterised in that: described tested circular cone rolls
The inner ring of sub-bearing coordinates with described test lead, and described test lead has shoulder, rolls at described shoulder and described tested circular cone
Adjustment back-up ring axially it is disposed with between sub-bearing.
5. taper roll bearing friction torque as claimed in claim 2 measures stand, it is characterised in that: described pressure end also has
Have: high-speed liquid hydrostatic bearing that periphery is arranged and the static pressure that is disposed axially between described pressure end and described pressure transducer
The axial locating piece of bearing.
6. taper roll bearing friction torque as claimed in claim 5 measures stand, it is characterised in that: described hydrostatic bearing axle
Having front end plush copper to locating piece, described front end plush copper is screw thread or cylinder；Described pressure end has shrinkage pool；Described front end plush copper
It is connected with described shrinkage pool；And the described axial locating piece of hydrostatic bearing is to described high-speed liquid hydrostatic bearing axial limiting.
7. taper roll bearing friction torque as claimed in claim 6 measures stand, it is characterised in that: described drive shaft edge
It is axially arranged with drive end angular contact ball bearing and connects end angular contact ball bearing, at described drive end angular contact ball bearing and described
Connect and there is between end angular contact ball bearing positioning spacer and realize axially location, and have outside main shaft along drive shaft periphery
Shell, to accommodate described drive end angular contact ball bearing and described connection end angular contact ball bearing.
8. taper roll bearing friction torque as claimed in claim 7 measures stand, it is characterised in that: described driving motor warp
Being connected with described drive shaft by positive coupling after belt pulley speed change gear, described belt pulley speed change gear includes with described
Drive the small belt pulley that motor is connected, and the big belt pulley by described small belt pulley belt drives, and described big belt pulley is defeated
Go out to hold axis and described drive shaft connects between end axis the axiality after described positive coupling connects at φ 0.05
Within；And the dynamic radial at the described connection end of described drive shaft beats within 0.05.
9. taper roll bearing friction torque as claimed in claim 7 measures stand, it is characterised in that: described drive end corner connection
Tactile ball bearing and the angular contact ball bearing that described connection end angular contact ball bearing is a pair back-to-back configuration, to bear axially simultaneously
With joint load radially；And described angular contact ball bearing is dual face seals pattern, interior note grease, to realize self-lubricating；Institute
The Internal and external cycle stating angular contact ball bearing realizes radially location by drive shaft and main shaft shell.
10. taper roll bearing friction torque as claimed in claim 7 measures stand, it is characterised in that: described high-speed liquid
Hydrostatic bearing is that it connects external hydraulic system without circumference oil-return type, by circumferentially disposed oilhole by being externally supplied pressure oil,
Static pressure carrying oil film is set up to realize hydrodynamic lubrication and described by the oil pressure realization circumference support of oil pocket at described Bearing inner
The rotation of test main shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620563483.0U CN205719360U (en) | 2016-06-02 | 2016-06-02 | Taper roll bearing friction torque measures stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620563483.0U CN205719360U (en) | 2016-06-02 | 2016-06-02 | Taper roll bearing friction torque measures stand |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205719360U true CN205719360U (en) | 2016-11-23 |
Family
ID=57302382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620563483.0U Expired - Fee Related CN205719360U (en) | 2016-06-02 | 2016-06-02 | Taper roll bearing friction torque measures stand |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205719360U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300469A (en) * | 2017-08-01 | 2017-10-27 | 人本集团有限公司 | Taper roll bearing dynamic friction torque feature measurement machine |
| CN107957310A (en) * | 2017-11-20 | 2018-04-24 | 上海宏予测试仪器有限公司 | A kind of measuring device for oil connection threaded fastener |
| CN109505855A (en) * | 2018-12-29 | 2019-03-22 | 无锡市朗迪测控技术有限公司 | New energy electromechanical testing platform high speed large torque main shaft |
| CN109612616A (en) * | 2018-12-30 | 2019-04-12 | 洛阳轴承研究所有限公司 | A kind of measurement of friction torque device of angular contact radial bearing |
-
2016
- 2016-06-02 CN CN201620563483.0U patent/CN205719360U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107300469A (en) * | 2017-08-01 | 2017-10-27 | 人本集团有限公司 | Taper roll bearing dynamic friction torque feature measurement machine |
| CN107300469B (en) * | 2017-08-01 | 2019-06-25 | 人本集团有限公司 | Tapered roller bearing dynamic friction torque feature measurement machine |
| CN107957310A (en) * | 2017-11-20 | 2018-04-24 | 上海宏予测试仪器有限公司 | A kind of measuring device for oil connection threaded fastener |
| CN107957310B (en) * | 2017-11-20 | 2023-07-04 | 上海宏予测试仪器有限公司 | Measuring device for threaded fastener of oil pipe joint |
| CN109505855A (en) * | 2018-12-29 | 2019-03-22 | 无锡市朗迪测控技术有限公司 | New energy electromechanical testing platform high speed large torque main shaft |
| CN109505855B (en) * | 2018-12-29 | 2024-01-30 | 无锡市朗迪测控技术有限公司 | High-speed large-torque main shaft of new energy motor test board |
| CN109612616A (en) * | 2018-12-30 | 2019-04-12 | 洛阳轴承研究所有限公司 | A kind of measurement of friction torque device of angular contact radial bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee after: Anhui Jianghuai Automobile Group Limited by Share Ltd Address before: 230601 Anhui Province, Hefei City Industrial Park, the Peach Blossom Road No. 669 Patentee before: Anhui Jianghuai Automotive Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161123 Termination date: 20190602 |