CN211206116U - Wear test device for friction pair - Google Patents
Wear test device for friction pair Download PDFInfo
- Publication number
- CN211206116U CN211206116U CN201921862815.5U CN201921862815U CN211206116U CN 211206116 U CN211206116 U CN 211206116U CN 201921862815 U CN201921862815 U CN 201921862815U CN 211206116 U CN211206116 U CN 211206116U
- Authority
- CN
- China
- Prior art keywords
- cylinder
- motor
- gear
- tested
- output bearing
- 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.)
- Withdrawn - After Issue
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 239000003921 oil Substances 0.000 claims description 20
- 239000012208 gear oil Substances 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 13
- 230000007246 mechanism Effects 0.000 abstract description 12
- 238000000227 grinding Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 description 11
- 230000005540 biological transmission Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a vice wear test device of friction, the on-line screen storage device comprises a base, be equipped with the hydro-cylinder on the base, motor and cylinder symmetry set up in the hydro-cylinder both sides, the motor includes output bearing, be equipped with the gear that awaits measuring on the output bearing, be equipped with the gasket that awaits measuring on the gear that awaits measuring, the cylinder includes cylinder ejection shaft, the epaxial casing that awaits measuring that is equipped with of cylinder ejection, the symmetry has output bearing fixed bolster and cylinder ejection shaft fixed bolster on the hydro-cylinder wall, output bearing passes output bearing fixed bolster, cylinder ejection shaft passes cylinder ejection shaft fixed bolster, the gear that awaits measuring, the gasket that awaits measuring, the casing that awaits measuring is near in the hydro-cylinder in proper order, output bearing, the gear that awaits measuring. The utility model has the advantages of, it has realized the wear test that two liang of mutual grindings between the three part of differential mechanism casing-gasket-gear, and it utilizes the cylinder to implement the axial loading mode, can realize the friction wear test of three part full contact.
Description
Technical Field
The utility model relates to an abrasion tester technical field specifically indicates a vice abrasion test device of friction that is used for automobile drive axle differential mechanism friction pair to test.
Background
The vehicle differential mechanism is divided into an inter-wheel differential mechanism and an inter-axle differential mechanism: the inter-wheel differential mechanism is used for connecting two transmission half shafts which are respectively connected with a left wheel and a right wheel, and the left wheel and the right wheel rotate at different speeds through the special design of a gear set, so that the aim of smoothly turning the vehicle is finally fulfilled; the inter-axle differential mechanism is used for connecting two driving axles to realize the purpose of rotating the two axles at different speeds. A gasket is arranged between the differential shell and the gear and plays a role in reducing the relative rotating speed between the shell and the gear so as to reduce the abrasion loss of the friction pair.
At present, the commercial vehicle has vehicle faults caused by the abrasion failure of a shell-gasket-gear friction pair in the differential, and high after-sale claims become a more prominent problem. Although there is a differential assembly bench test device, it is only a passing verification test, and what is examined is the performance of the differential assembly system, and the period is long and the cost is high.
In addition, as shown in fig. 4 and 5, the test devices commonly used in the market for evaluating the wear performance of materials or parts mainly have pin-plate type, ring-block type, or both of them. All the test devices can only examine the abrasion conditions of two opposite grinding parts, mutual grinding among three parts of a differential case, a gasket and a gear cannot be tested, the abrasion loss of the three parts cannot be obtained simultaneously, and the test data has low value due to the fact that the test conditions are greatly different from the actual working conditions.
Therefore, it is very important to independently develop a special test device capable of comprehensively checking the wear performance of the shell-gasket-gear friction pair.
The utility model discloses a patent application number is 201620207398.0's utility model discloses a can rotate experimental friction wear testing machine, it mainly includes the base, fixes actuating mechanism and the last anchor clamps on the base, actuating mechanism including consecutive motor, speed reducer and transmission shaft, the liquid groove, wherein, the lower test piece of waiting to test is ring shape and fixed mounting in the output of transmission shaft, can adorn lubricating oil or other liquid in the liquid groove last anchor clamps correspond the top of locating lower test piece, the last test piece of waiting to test links to each other with the clamping piece is fixed, connects through welded mode, and the clamping piece is fixed in the draw-in groove of last anchor clamps, realizes changing the last test piece of different shapes through setting up of above-mentioned clamping piece, simulates the wearing and tearing process under different forms friction pair and different contact states.
This utility model is that the transmission through the transmission shaft drives cyclic annular lower test piece and rotates, applys decurrent effort through last anchor clamps and makes test block and test block contact down, and lubricated liquid is added to the liquid inslot, carries out frictional wear test. This utility model is improved on the basis of current reciprocating type linear motion friction wear test machine and is obtained, can simulate the vice rotatory sliding wear process under different contact condition of different forms friction to can reflect the actual wearing and tearing operating mode between sink roll slide bearing axle sleeve and the axle bush better. But the technology can only detect the abrasion of a pair of friction pairs, and cannot perform the simultaneous mutual abrasion test of three parts of a differential case, a gasket and a gear. The tester is specially designed and manufactured for the abrasion test of the sliding bearing shaft sleeve and the bearing bush, so that the test of the opposite abrasion of two parts can be only completed. Moreover, it can only detect wear of non-fully contacting parts, which is determined by the way the test load is applied and the tester configuration. It does not have heating device, only can carry out the frictional wear test under the normal atmospheric temperature, and moreover, it is comparatively troublesome to change the test piece.
Disclosure of Invention
The utility model aims at solving the above problem, providing a vice wear test device of friction, its operating condition who combines the gasket friction pair for develop the vice wear test of differential mechanism friction and performance evaluation, and find the method that promotes the differential mechanism performance based on the wear test data.
For realizing above-mentioned purpose, the utility model discloses a vice wear test device of friction, the on-line screen storage device comprises a base, be equipped with hydro-cylinder, motor and cylinder on the base, motor and cylinder symmetry set up in the hydro-cylinder both sides, the motor includes output bearing, the last gear that awaits measuring that is equipped with of output bearing, be equipped with the gasket that awaits measuring on the gear that awaits measuring, the cylinder includes cylinder ejection shaft, be equipped with the casing that awaits measuring on the cylinder ejection shaft, the symmetry has output bearing fixed bolster and cylinder ejection shaft fixed bolster on the hydro-cylinder wall, output bearing passes output bearing fixed bolster, cylinder ejection shaft passes cylinder ejection shaft fixed bolster, gear, the gasket that awaits measuring, the casing that awaits measuring are near in the hydro-cylinder in proper order, output bearing, the gear that awaits measuring, the gasket that awaits measuring, the casing that awaits measuring and cylinder ejection shaft.
Furthermore, gear oil is arranged in the oil cylinder, an oil discharge valve is arranged at the bottom of the oil cylinder, and a heating device is further arranged in the oil cylinder. Therefore, when the gear lubricating oil testing device is used, gear lubricating oil of different types can be adopted to simulate wear tests of different lubricating states.
Furthermore, a clamping coupler is further arranged on the motor, and the output bearing penetrates through the clamping coupler to be connected with the motor. Therefore, the slit of the output bearing is contracted, the axle center is tightly locked, the fixing and the dismounting are convenient, the damage of the output bearing can not be caused, and meanwhile, no rotary gap exists.
Furthermore, a motor support and a cylinder support are arranged on the base, the motor is fixed on the base through the motor support, and the cylinder is fixed on the base through the cylinder support. Therefore, the output bearing and the cylinder ejection shaft can be simply and conveniently adjusted to be coaxially arranged by adjusting the motor support and the cylinder support.
Further, the output bearing fixing support and the cylinder ejection shaft fixing support are both fixed with the wall of the oil cylinder through bolts. Therefore, the bearing fixing bracket and the cylinder ejection shaft fixing bracket can be stably installed on the cylinder wall, and a sealing effect can be achieved.
As a preferred option, be equipped with total frame on the base, motor support and cylinder support all set up on total frame. By the structure, the whole device is more stable in use, and the stability of the device is enhanced.
Preferably, the motor is connected with a controller for controlling the switching, timing and speed regulation of the motor, and the controller is arranged in the main frame. By the structure, an operator can conveniently operate the motor in actual use and control the motor in real time.
Preferably, the cylinder is connected with an ejection shaft adjuster for controlling an ejection shaft of the cylinder, and the ejection shaft adjuster is arranged in the overall frame. By the structure, an operator can conveniently operate the ejection shaft in actual use, and the ejection shaft of the cylinder is controlled in real time.
Preferably, a temperature regulator for controlling the temperature of the heating device is connected to the heating device, and the temperature regulator is arranged in the overall frame. By the structure, an operator can conveniently operate the gear oil temperature control device in actual use, and the gear oil temperature is controlled in real time.
Preferably, a pressure regulator for controlling the pressure of the air cylinder is connected to the air cylinder, and the pressure regulator is arranged in the overall frame. By the structure, an operator can conveniently operate in actual use, and the pressure of the air cylinder is controlled in real time.
The utility model has the advantages of, it has realized the wear test that two liang of mutual grindings between the three part of differential mechanism casing-gasket-gear, and it utilizes the cylinder to implement the axial loading mode, can realize the friction wear test of three part full contact. The gear and the gasket in the three test parts are all finished parts produced at present, the material and the processing technology of the shell part are consistent with those of actual parts, and the test data are closer to the actual use working condition. The inner holes of the gear and the shell are provided with key slots, so that the assembly and disassembly are convenient. The heating and temperature control device can simulate the wear conditions of the differential shell, the gasket and the gear at different temperatures, and is more suitable for actual working conditions.
Drawings
Fig. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic view of the usage state of the present invention;
FIG. 3 is a schematic diagram showing the positional relationship of the gear to be tested, the gasket to be tested, and the housing to be tested during use;
FIG. 4 is a schematic view of a pin-disk type test apparatus described in the background art;
FIG. 5 is a schematic view of a block-type test apparatus according to the background art.
In the figure: the device comprises a base 1 (wherein, a motor support 1.1 and a cylinder support 1.2), an oil cylinder 2 (wherein, an output bearing fixing support 2.1, a cylinder ejection shaft fixing support 2.2, gear oil 2.3 and an oil discharge valve 2.4), a motor 3 (wherein, an output bearing 3.1 and a clamping coupler 3.2), a cylinder 4 (wherein, a cylinder ejection shaft 4.1), a gear 5 to be tested, a gasket 6 to be tested, a shell 7 to be tested, a heating device 8, a bolt 9, a main frame 10, a controller 11, an ejection shaft regulator 12, a temperature regulator 13 and a pressure regulator 14.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific embodiments:
the friction pair wear test device comprises a base 1, wherein an oil cylinder 2, a motor 3 and an air cylinder 4 are arranged on the base 1, the motor 3 and the air cylinder 4 are symmetrically arranged on two sides of the oil cylinder 2, the motor 3 comprises an output bearing 3.1, a gear 5 to be tested is arranged on the output bearing 3.1, a gasket 6 to be tested is arranged on the gear 5 to be tested, the air cylinder 4 comprises an air cylinder ejection shaft 4.1, a shell 7 to be tested is arranged on the air cylinder ejection shaft 4.1, an output bearing fixing support 2.1 and an air cylinder ejection shaft fixing support 2.2 are symmetrically arranged on the wall of the oil cylinder 2, the output bearing 3.1 penetrates through the output bearing fixing support 2.1, the air cylinder ejection shaft 4.1 penetrates through the air cylinder ejection shaft fixing support 2.2, the gear 5 to be tested, the gasket 6 to be tested and the shell 7 to be tested are sequentially abutted against each other in the oil cylinder 2, and the output bearing 3.1, the gear 5 to be tested, the gasket 6, The shell 7 to be tested and the cylinder ejection shaft 4.1 are coaxially arranged. Be equipped with gear oil 2.3 in the hydro- cylinder 2, 2 bottoms of hydro-cylinder are equipped with oil drain valve 2.4, still be equipped with heating device 8 in the hydro-cylinder 2. Still be equipped with on the motor 3 and press from both sides tight shaft coupling 3.2, output bearing 3.1 passes and presss from both sides tight shaft coupling 3.2 and is connected with motor 3. The motor is characterized in that a motor support 1.1 and a cylinder support 1.2 are arranged on the base 1, the motor 3 is fixed on the base 1 through the motor support 1.1, and the cylinder 4 is fixed on the base 1 through the cylinder support 1.2. The output bearing fixing support 2.1 and the cylinder ejection shaft fixing support 2.2 are fixed with the wall of the oil cylinder 2 through bolts 9. The base 1 is provided with a main frame 10, and the motor support 1.1 and the cylinder support 1.2 are both arranged on the main frame 10. The motor 3 is connected with a controller 11 for controlling the switching, timing and speed regulation of the motor, and the controller 11 is arranged in the main frame 10. The cylinder 4 is connected with an ejection shaft adjuster 12 for controlling the ejection shaft 4.1 of the cylinder, and the ejection shaft adjuster 12 is arranged in the overall frame 10. The heating device 8 is connected with a temperature regulator 13 for controlling the temperature of the heating device, and the temperature regulator 13 is arranged in the overall frame 10. The cylinder 4 is connected with a pressure regulator 14 for controlling the pressure of the cylinder, and the pressure regulator 14 is arranged in the overall frame 10.
The utility model discloses when in actual use:
the motor 3 provides speed-adjustable rotation power for simulating the rotation of the gear 5 to be tested in the differential. The output shaft fixing support 2.1 and the cylinder ejection shaft fixing support 2.2 not only play a role in sealing, and avoid gear oil 2.3 from leaking, but also guarantee the coaxiality of the cylinder ejection shaft 4.1 and the output bearing 3.1 together with the main frame 10, prevent eccentric wear and improve the test precision. The cylinder 4 provides axial thrust for simulating the pressure among the gear 5 to be tested, the gasket 6 to be tested and the shell 7 to be tested in the differential. The gear 5 to be tested and the gasket 6 to be tested are all finished parts produced at present, the material and the processing technology of the shell 7 to be tested are consistent with those of actual parts, but the structure is simplified. The gear 5 to be measured can rotate around the shaft, and the test piece of the shell 7 to be measured only moves horizontally. Gear oil 2.3 with different types can be arranged in the oil cylinder 2 to simulate wear tests in different lubricating states. The temperature regulator 13 and the heating device 8 can control the oil temperature of the gear oil 2.3 to check the influence of the temperature on the wear. The shell 7 to be measured and the existing production shell are processed by casting blanks in the same furnace, and the structure, the hardness and the size of a joint surface of the shell are consistent with those of the existing production shell. The gear 5 to be tested is a currently produced part, and the type of the lubricating oil is the type used for actual loading.
The gear 5 to be tested, the gasket 6 to be tested and the shell 7 to be tested are tightly attached together under the thrust action of the cylinder 4, certain coaxiality is kept, the lower part of the gear 5 to be tested is immersed in gear oil 2.3 used for loading, and the gear oil 2.3 is stirred by the rotation of the gear 5 to be tested to generate a lubricating effect.
During testing, the gear 5 to be tested is arranged on an output bearing 3.1 of the motor 3 through a key groove, the shell 7 to be tested is arranged on a cylinder ejection shaft 4.1 connected with the cylinder 4 through the key groove, then a gasket 6 to be tested is arranged, then an ejection shaft regulator 12 is opened, the cylinder 4 pushes the shell 7 to be tested to move horizontally, finally the gasket 6 to be tested is clamped between the gear 5 to be tested and the shell 7 to be tested, finally the motor 3 is started, the gear 5 to be tested is driven to rotate around a shaft, the controller 11 for timing is started at the same time, and the abrasion test is started. The controller 11 can also be used to adjust the rotation speed of the motor 3 to meet the requirements of the test. The gear oil 2.3 is close to the central line of the rotating shaft, and the gear oil is stirred when the gear to be tested 5 rotates, so that the gear to be tested 5, the gasket to be tested 6 and the shell to be tested 7 are lubricated.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. Obviously, the present invention is not limited to the above-described embodiments, and many modifications are possible. Any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should be considered as belonging to the protection scope of the present invention.
Claims (10)
1. The utility model provides a vice wear test device of friction which characterized in that: comprises a base (1), an oil cylinder (2), a motor (3) and a cylinder (4) are arranged on the base (1), the motor (3) and the cylinder (4) are symmetrically arranged at two sides of the oil cylinder (2),
the motor (3) comprises an output bearing (3.1), a gear (5) to be tested is arranged on the output bearing (3.1), a gasket (6) to be tested is arranged on the gear (5) to be tested,
the cylinder (4) comprises a cylinder ejection shaft (4.1), a shell (7) to be tested is arranged on the cylinder ejection shaft (4.1),
an output bearing fixing support (2.1) and a cylinder ejection shaft fixing support (2.2) are symmetrically arranged on the wall of the oil cylinder (2), the output bearing (3.1) penetrates through the output bearing fixing support (2.1), the cylinder ejection shaft (4.1) penetrates through the cylinder ejection shaft fixing support (2.2),
the gear to be tested (5), the gasket to be tested (6) and the shell to be tested (7) are close to each other in the oil cylinder (2) in sequence, and the output bearing (3.1), the gear to be tested (5), the gasket to be tested (6), the shell to be tested (7) and the cylinder ejection shaft (4.1) are coaxially arranged.
2. A friction pair wear test device according to claim 1, characterized in that: be equipped with gear oil (2.3) in hydro-cylinder (2), hydro-cylinder (2) bottom is equipped with oil drain valve (2.4), still be equipped with heating device (8) in hydro-cylinder (2).
3. A friction pair wear test device according to claim 2, characterized in that: the motor (3) is further provided with a clamping coupler (3.2), and the output bearing (3.1) penetrates through the clamping coupler (3.2) to be connected with the motor (3).
4. A friction pair wear test device according to any one of claims 1 to 3, characterized in that: the motor is characterized in that a motor support (1.1) and a cylinder support (1.2) are arranged on the base (1), the motor (3) is fixed on the base (1) through the motor support (1.1), and the cylinder (4) is fixed on the base (1) through the cylinder support (1.2).
5. A friction pair wear test device according to claim 4, characterized in that: the output bearing fixing support (2.1) and the cylinder ejection shaft fixing support (2.2) are fixed with the wall of the cylinder (2) through bolts (9).
6. A friction pair wear test device according to claim 5, characterized in that: the motor is characterized in that a main frame (10) is arranged on the base (1), and the motor support (1.1) and the cylinder support (1.2) are arranged on the main frame (10).
7. A friction pair wear test device according to claim 6, characterized in that: the motor (3) is connected with a controller (11) for controlling the on-off, timing and speed regulation of the motor, and the controller (11) is arranged in the main frame (10).
8. A friction pair wear test device according to claim 7, characterized in that: the cylinder (4) is connected with an ejection shaft regulator (12) for controlling an ejection shaft (4.1) of the cylinder, and the ejection shaft regulator (12) is arranged in the main frame (10).
9. A friction pair wear test device according to claim 2, characterized in that: the heating device (8) is connected with a temperature regulator (13) for controlling the temperature of the heating device, and the temperature regulator (13) is arranged in the main frame (10).
10. A friction pair wear test device according to claim 9, characterized in that: the air cylinder (4) is connected with a pressure regulator (14) for controlling the pressure of the air cylinder, and the pressure regulator (14) is arranged in the main frame (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862815.5U CN211206116U (en) | 2019-10-31 | 2019-10-31 | Wear test device for friction pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921862815.5U CN211206116U (en) | 2019-10-31 | 2019-10-31 | Wear test device for friction pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211206116U true CN211206116U (en) | 2020-08-07 |
Family
ID=71885421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921862815.5U Withdrawn - After Issue CN211206116U (en) | 2019-10-31 | 2019-10-31 | Wear test device for friction pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211206116U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608964A (en) * | 2019-10-31 | 2019-12-24 | 东风商用车有限公司 | Wear test device for friction pair |
-
2019
- 2019-10-31 CN CN201921862815.5U patent/CN211206116U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608964A (en) * | 2019-10-31 | 2019-12-24 | 东风商用车有限公司 | Wear test device for friction pair |
| CN110608964B (en) * | 2019-10-31 | 2024-08-02 | 东风商用车有限公司 | Friction pair abrasion test device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107167056B (en) | Test device for detecting wear of materials of cycloidal gear and needle bearing of RV reducer | |
| CN109632161B (en) | Rolling bearing friction torque testing machine | |
| CN104165768A (en) | Bearing integrated dynamic performance test device and method | |
| CN110608964A (en) | Wear test device for friction pair | |
| CN111307639B (en) | Floating oil seal running-in abrasion leakage performance testing machine | |
| CN108240945A (en) | A kind of temperature control friction wear testing machine suitable for revolute pair | |
| CN211206116U (en) | Wear test device for friction pair | |
| CN207763955U (en) | Aviation high speed roller bearing Work condition analogue device | |
| US4092855A (en) | Dynamometer and coupling for a test stand | |
| CN105716851A (en) | Rotating bending fatigue testing machine for valves | |
| CN113484014B (en) | Examination test system for dynamic sealing performance of sealing ring | |
| CN109612615A (en) | The test device of automobile hub bearing load friction torque | |
| CN112798184A (en) | Oil seal testing device with high simulation dynamic simulation effect | |
| CN114354423B (en) | Piston ring groove-piston ring friction and wear testing machine and testing method | |
| CN219977767U (en) | Spliced railway bearing fault diagnosis test bed | |
| US6601445B2 (en) | Roller type test stand for testing motor vehicles and/or tires | |
| CN114166676A (en) | Hydraulic pump flow distribution pair friction and wear testing device with online monitoring function | |
| CN215598708U (en) | Sliding bearing rotation testing machine capable of realizing temperature change, load change and speed change | |
| CN107084897A (en) | A kind of single four spot contact bearing ball cunnings/rolling friction wear testing machine for driving differential two groups of disks | |
| CN203929389U (en) | Simulation test machine for automobile hub bearing unit anti-dust performance | |
| CN214200634U (en) | Double-station hub bearing unit working condition simulation testing machine | |
| CN110987697B (en) | Double-drive stepless speed regulation wheel rail rolling contact fatigue test device and method | |
| CN204439344U (en) | A kind of running-in of gear device | |
| CN207866510U (en) | Apply the rolling bearing performance experimental rig of radially alternating load based on V belt translation | |
| CN220063342U (en) | A accredited testing organization for circumference vibrations analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200807 Effective date of abandoning: 20240802 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20200807 Effective date of abandoning: 20240802 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |