CN201575922U - On-road driving characteristics simulation test plant for vertical shaft type car tire - Google Patents
On-road driving characteristics simulation test plant for vertical shaft type car tire Download PDFInfo
- Publication number
- CN201575922U CN201575922U CN 200920274895 CN200920274895U CN201575922U CN 201575922 U CN201575922 U CN 201575922U CN 200920274895 CN200920274895 CN 200920274895 CN 200920274895 U CN200920274895 U CN 200920274895U CN 201575922 U CN201575922 U CN 201575922U
- Authority
- CN
- China
- Prior art keywords
- pivoted arm
- disposed
- shaft
- cylinder
- computing machine
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Tires In General (AREA)
Abstract
An on-road driving characteristics simulation test plant for vertical shaft type auto tire is disclosed. a computer and an air-conditioning outdoor unit are disposed outside the soundproof chamber; a roller with the outer surface provided with an asphalt concrete pavement layer or cement concrete pavement layer is disposed on the bottom in the soundproof chamber; an AC frequency conversion motor, a speed reducer and a main shaft are disposed on the bottom inside the roller; the AC frequency conversion motor is connected with the speed reducer by a belt transmission mechanism; the speed reducer is connected with the main shaft by a belt transmission mechanism; a rotation arm is disposed on the upper end of the main shaft; a left wheel shaft with the lower end mounted with a left automobile test wheel is disposed on the left end of the rotation arm; a right wheel shaft with the lower end mounted with a right automobile test wheel is disposed on the right end of the rotation arm; an air-conditioning indoor unit is disposed on the inner sidewall of the roller while in communication with the air-conditioning outdoor unit by pipelines; a roller top cover is disposed on the roller top; a rotating speed sensor connected with the computer by conducting wires is disposed on the roller top cover; an audio frequency sensor connected with the computer by conducting wires is disposed on the left wheel shaft; and a camera connected with the computer by conducting wires is disposed on the right wheel shaft.
Description
Technical field
The utility model belongs to the inspection technology field of vehicle, is specifically related to the check of interactional characteristic between tire and the road surface.
Background technology
Along with the growing interest to environment, walkaway becomes an important technical of domestic and international road surface and the detection of tyre ring guaranteed cost.In Pavement Design and tire design, need test with testing equipment road pavement surface rideability and tire dynamic property, for research and development of products provides foundation.
At present, at home and abroad the test unit that travels on the road surface of Yan Zhi simulated automotive tire mostly is axle horizontal type, roughly there are two kinds, a kind of is that the external drum-type doughnut of tire is dynamical characteristic test bed, this testing table will be tested tire and be fixed on outside the cylinder wall, drive tyre rotation by rotary drum, to realize simulation tire high-speed cruising.The major defect of this device is, actual ground surface material can't bear the centrifugal force that the cylinder high speed rotating produces, rubbing characteristics between test tire and the ground can not road surface that is virtually reality like reality by smearing wear-resistant material at outer surface of cylinder and the tire friction realizes.Another kind is the built-in drum-type doughnut of a tire testing table, this testing table will be tested tire and be fixed on inner wall of rotary drum, drive tyre rotation by rotary drum, the centrifugal force of ground surface material is born by cylinder, when realizing high speed rotating, and simulated automotive tire ride characteristic on the road surface truly, its major defect is a production cost height, used propulsion system noise is big, has influence on test findings, has polluted environment.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the shortcoming of the dynamical characteristic test bed and built-in drum-type doughnut of the tire testing table of the external drum-type doughnut of above-mentioned axle horizontal type tire, provides a kind of test data is true and reliable, automaticity is high, the propulsion system noise is little, cost of products is low vertical-shaft automobile tire at road moving characteristic simulation tester.
Solving the problems of the technologies described above the technical scheme that is adopted is: be outside equipped with computing machine at soundproof room, the air-conditioner outdoor unit group, bottom in the soundproof room is provided with the cylinder that the outside surface making has bituminous concrete pavement layer or cement concrete pavement layer, bottom in the cylinder is provided with ac variable-frequency electric motor, reductor, main shaft, ac variable-frequency electric motor links by belt gear and reductor, reductor links by belt gear and main shaft, the upper end of main shaft is provided with pivot arm, the left end of pivot arm is provided with the revolver axle that left automobile test wheel is equipped with in the lower end, the right-hand member of pivot arm is provided with the right wheel shaft that right automobile test wheel is equipped with in the lower end, the cylinder madial wall is provided with by pipeline and the logical indoor apparatus of air conditioner group of air-conditioner outdoor unit set associative, the cylinder top is provided with drum upper cover, the speed probe that links to each other with computing machine by lead is set on the drum upper cover, the revolver axle is provided with the audio sensor that is connected with computing machine by lead, and right wheel shaft is provided with the camera that links to each other with computing machine by lead.
Pivot arm of the present utility model is: the center pivoted arm is arranged on the main shaft, the end that screw rod is adjusted on a left side is arranged on the pivoted arm of center, the other end is arranged on the flexible pivoted arm in a left side, and the left end of the flexible pivoted arm in a left side is provided with the revolver axle, the middle part is provided with the Zola's force transducer that is connected with computing machine by lead; A right end of adjusting screw rod is arranged on the pivoted arm of center, the other end is arranged on the right flexible pivoted arm, and the right-hand member of right flexible pivoted arm is provided with right wheel shaft, the middle part is provided with the right pulling force sensor that is connected with computing machine by lead.
The distance that audio sensor of the present utility model is positioned at left automobile test wheel and cylinder surface of contact is 30～100mm place.The distance that camera of the present utility model is positioned at right automobile test wheel and cylinder surface of contact is 100～300mm place.
The stretch transversal section profile of pivoted arm, right flexible pivoted arm of a left side of the present utility model is a rectangle, and the inside surface with the center pivoted arm around the flexible pivoted arm transversal section, a left side is a clearance fit, and the inside surface with the center pivoted arm around the right flexible pivoted arm transversal section is a clearance fit.
An end is provided with the revolver axle on pivot arm, the other end is provided with right wheel shaft in the utility model employing, left automobile test wheel is set on the revolver axle, right automobile test wheel is set on the right wheel shaft, left side automobile test wheel and right automobile test are taken turns to have on bituminous concrete or the cement concrete cylinder outer wall simulated roadway at making and are travelled, the driving process of simulated automotive tire on the road surface, the rubbing action between noise, tire and the road surface that is produced between tire and the road surface in the detection driving process and the wear condition on tire and road surface.The utlity model has advantages such as test data is true and reliable, automaticity is high, the propulsion system noise is little, cost of products is low, be used for estimating different tires noise that driving process produced on different road surfaces and road surfaces ride characteristic, endurance quality, the squeegee action situation.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment 1.
Fig. 2 is the A-A cut-open view of Fig. 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiment.
In Fig. 1, the vertical-shaft automobile tire of present embodiment at road moving characteristic simulation tester by main shaft 1, ac variable-frequency electric motor 2, preceding driving pulley 3, preceding driving belt 4, preceding driven pulley 5, reductor 6, cylinder 7, left side automobile test wheel 8, revolver axle 9, audio sensor 10, pivot arm 11, back driving pulley 12, back driving belt 13, back driven pulley 14, drum upper cover 15, speed probe 16, indoor apparatus of air conditioner group 17, camera 18, soundproof room 19, right wheel shaft 20, right automobile test wheel 21, air-conditioner outdoor unit group 22, computing machine 23 connects formation.
Be outside equipped with computing machine 23, air-conditioner outdoor unit group 22 at soundproof room 19, computing machine 23 is used for the information that receives is carried out data processing.Bottom in the soundproof room 19 is installed with cylinder 7, the outside surface making of cylinder 7 has the bituminous concrete pavement layer, the simulation bituminous concrete pavement, also can be at the outside surface making cement concrete pavement layer of cylinder 7, the simulation cement concrete pavement, bottom in the cylinder 7 is fixedly connected with the screw threads for fastening connector ac variable-frequency electric motor 2 is installed, reductor 6, bottom centre position in the cylinder 7 is supported with main shaft 1 with bearing, ac variable-frequency electric motor 2 provides power for the utility model, on the output shaft of ac variable-frequency electric motor 2 with the binding fitting be fixedly connected before driving pulley 3, on the input shaft of reductor 6 with the binding fitting be fixedly connected before driven pulley 5, the preceding driving belt 4 of preceding driving pulley 3 usefulness links with preceding driven pulley 5, on the output shaft of reductor 6 with the binding fitting be fixedly connected the back driving pulley 12, on the main shaft 1 with the binding fitting back driven pulley 14 that has been fixedly connected, back driving pulley 12 usefulness back driving belt 13 and afterwards driven pulley 14 link.Ac variable-frequency electric motor 2 drives the rotation of reductor 6 input shafts by preceding driving belt 4, and reductor 6 output shafts drive main shaft 1 rotation by back driving belt 13.The top of cylinder 7 is equipped with drum upper cover 15, the upper end of main shaft 1 is fixedly connected with the middle part of connector and pivot arm 11, between main shaft 1 and the drum upper cover 15 bearing is installed, 11 rotations of main shaft 1 driven rotary arm, the left end of pivot arm 11 is fixedly connected with the upper end of connector and revolver axle 9, the lower end of revolver axle 9 is equipped with left automobile test wheel 8, between revolver axle 9 and the left automobile test wheel 8 bearing is installed, and the tire tread of left automobile test wheel 8 contacts with the outside surface of cylinder 7.
The right-hand member of pivot arm 11 is fixedly connected with the upper end of connector and right wheel shaft 20, right wheel shaft 20 lower ends are equipped with right automobile test wheel 21, the quality of right wheel shaft 20 and revolver axle 9 identical in quality, the quality of right automobile test wheel 21 and left automobile test take turns 8 identical in quality, between right wheel shaft 20 and the right automobile test wheel 21 bearing is installed, the tire tread of right automobile test wheel 21 contacts with the outside surface of cylinder 7.During main shaft 11 rotations, drive revolver axle 9, right wheel shaft 20 around main shaft 1 rotation, under the friction force effect of tire tread and cylinder 7 outside surfaces, left automobile test wheel 8 and right automobile test wheel 21 roll at cylinder 7 outside surfaces, and the simulated automotive tire travels on the road surface.Be installed with indoor apparatus of air conditioner group 17 with the screw thread fixed coupling unit on the inwall of cylinder 7, indoor apparatus of air conditioner group 17 links by pipeline and air-conditioner outdoor unit group 22, indoor apparatus of air conditioner group 17 constitutes refrigeration system with air-conditioner outdoor unit group 22, for the equipment in the cylinder 7 provides suitable temperature environment.
Following being fixedly connected with the screw threads for fastening connector of drum upper cover 15 is equipped with speed probe 16, speed probe 16 links to each other with computing machine 23 by lead, the tach signal of driven pulley 14 converted electric signal to and outputs to computing machine 23 after speed probe 16 will receive, electrical signal collection and disposal system are housed in the computing machine 23, computing machine 23 calculates the rotating speed of driven pulley 14 afterwards, go forward side by side line item and data processing according to the program of prior setting.Be fixedly connected with the screw threads for fastening connector on the revolver axle 9 audio sensor 10 is installed, the distance that audio sensor 10 is positioned at left automobile test wheel 8 and cylinder 7 surface of contact is 30～100mm place, 50mm is best, concrete distance should be determined according to the model of audio sensor 10, audio sensor 10 is connected with computing machine 23 by lead, audio sensor 10 converts the sound signal of received left automobile test wheel 8 to electric signal and outputs to computing machine 23, computing machine 23 writes down and data processing according to the program of prior setting, calculates left automobile test wheel 8 noises that produced when cylinder 7 outside surfaces roll.On right wheel shaft 20, be fixedly connected with the screw threads for fastening connector camera 18 is installed, the distance that camera 18 is positioned at right automobile test wheel 21 and cylinder 7 surface of contact is 100～300mm place, 200mm is best, concrete distance should be determined according to the model of camera 18, camera 18 is connected with computing machine 23 by lead, camera 18 converts the deformation signal of received right automobile test wheel 21 to electric signal and outputs to computing machine 23, computing machine 23 writes down and data processing according to the program of prior setting, calculates 21 distortion that produced when cylinder 7 outside surfaces roll of right automobile test wheel.
Fig. 2 has provided the A-A cut-open view of Fig. 1.In Fig. 2, the pivot arm 11 of present embodiment is made of the flexible pivoted arm 11-1 in a left side, left side adjustment screw rod 11-2, adjustment nut 11-3, Zola's force transducer 11-4, center pivoted arm 11-5, right flexible pivoted arm 11-6, right adjustment screw rod 11-7, right pulling force sensor 11-8 connection.Center pivoted arm 11-5 is fixedly connected with the screw thread fixed coupling unit and is installed in the upper end of main shaft 1, the end of left side adjustment screw rod 11-2 is hinged with center pivoted arm 11-5, the other end connects with the flexible pivoted arm 11-1 in a left side with adjusting nut 11-3, adjust nut 11-3 by rotation, regulate the flexible outwardly directed length of pivoted arm 11-1 in a left side, the left end of the flexible pivoted arm 11-1 in a left side links with connector and revolver axle 9.The transversal section profile of the flexible pivoted arm 11-1 in a left side is a rectangle, and the inside surface with center pivoted arm 11-5 around the flexible pivoted arm 11-1 transversal section, a left side is a clearance fit relationship.The middle part that screw rod 11-2 is adjusted on a left side is equipped with Zola's force transducer 11-4 by thread connection, Zola's force transducer 11-4 is connected with computing machine 23 by lead, Zola's force transducer 11-4 becomes electric signal to output to computing machine 23 the stressed conversion of signals of received left automobile test wheel 8, computing machine 23 writes down and data processing according to the program of prior setting, calculates left automobile test wheel 8 suffered power when cylinder 7 outside surfaces roll.
The end of right adjustment screw rod 11-7 is hinged with center pivoted arm 11-5, the other end connects with right flexible pivoted arm 11-6 with adjusting nut 11-3, the quality of right flexible pivoted arm 11-6 is identical in quality with the flexible pivoted arm 11-1's in a left side, adjust nut 11-3 by rotation, regulate the right flexible outwardly directed length of pivoted arm 11-6, the right-hand member of right flexible pivoted arm 11-6 links with connector and right wheel shaft 20.The transversal section profile of right flexible pivoted arm 11-6 is a rectangle, and the inside surface with center pivoted arm 11-5 around the right flexible pivoted arm 11-6 transversal section is a clearance fit relationship.The right middle part of adjusting screw rod 11-7 is equipped with right pulling force sensor 11-8 by thread connection, right pulling force sensor 11-8 is connected with computing machine 23 by lead, right pulling force sensor 11-8 becomes electric signal to output to computing machine 23 the stressed conversion of signals of received right automobile test wheel 21, computing machine 23 writes down and data processing according to the program of prior setting, calculates right automobile test wheel 21 suffered power when cylinder 7 outside surfaces roll.
The course of work of the present utility model is as follows:
When beginning to test, left automobile test wheel 8, right automobile test wheel 21 are installed, are adjusted the adjustment nut 11-3 in left side, the flexible pivoted arm 11-1 in a left side moves, left side automobile test wheel 8 and cylinder 7 overlap joints are by Zola's force transducer 11-4, make the load of left automobile test wheel 8 reach setting value; Adjust the adjustment nut 11-3 on right side, right flexible pivoted arm 11-6 is by automobile test wheel 21 and cylinder 7 overlap joints, by right pulling force sensor 11-8, make the load of right automobile test wheel 21 reach setting value.Start ac variable-frequency electric motor 2, slow down, drive main shaft 1 by reductor 6 and rotate through reductor 6,11 rotations of main shaft 1 driven rotary arm, pivot arm 11 drives left automobile test wheel 8 by revolver axle 9 and rolls around the annular road surface of cylinder 7 outer walls; Pivot arm 11 drives right automobile test wheel 21 by right wheel shaft 20 and rolls noise and doughnut and pavement friction and abrasion deformation situation that the simulated automotive tire travels and produced around the annular road surface of cylinder 7 outer walls on the road surface.The tach signal of driven pulley 14 converted electric signal to and outputs to computing machine 23 after speed probe 16 will receive, audio sensor 10 converts the sound signal of received left automobile test wheel 8 to electric signal and outputs to computing machine 23, camera 18 converts the deformation signal of received right automobile test wheel 21 to electric signal and outputs to computing machine 23, Zola's force transducer 11-4 becomes electric signal to output to computing machine 23 the stressed conversion of signals of received left automobile test wheel 8, right pulling force sensor 11-8 becomes electric signal to output to computing machine 23 the stressed conversion of signals of received right automobile test wheel 21, computing machine 23 writes down and data processing according to the program of prior setting, calculate left automobile test wheel 8 and the speed of right automobile test wheel 21 when cylinder 7 outside surfaces roll, stressed, and calculate left automobile test wheel 8 noises that produced, 21 distortion that produced of right automobile test wheel.
During test, also audio sensor 10, camera 18 all can be installed in the relevant position of left automobile test wheel 8, study the relation between stressed, the distortion, noise, load of left automobile test wheel 8.
Claims (4)
1. a vertical-shaft automobile tire is at road moving characteristic simulation tester, it is characterized in that: be outside equipped with computing machine (23) at soundproof room (19), air-conditioner outdoor unit group (22), bottom in the soundproof room (19) is provided with the outside surface making the cylinder of bituminous concrete pavement layer or cement concrete pavement layer (7), bottom in the cylinder (7) is provided with ac variable-frequency electric motor (2), reductor (6), main shaft (1), ac variable-frequency electric motor (2) links by belt gear and reductor (6), reductor (6) links by belt gear and main shaft (1), the upper end of main shaft (1) is provided with pivot arm (11), the left end of pivot arm (11) is provided with the revolver axle (9) that left automobile test wheel (8) is equipped with in the lower end, the right-hand member of pivot arm (11) is provided with the right wheel shaft (20) that right automobile test wheel (22) is equipped with in the lower end, the indoor apparatus of air conditioner group (17) that cylinder (7) madial wall setting links by pipeline and air-conditioner outdoor unit group (22), cylinder (7) top is provided with drum upper cover (15), drum upper cover (15) is gone up the speed probe (16) that links to each other with computing machine (23) by lead is set, revolver axle (9) is provided with the audio sensor (10) that is connected with computing machine (23) by lead, and right wheel shaft (20) is provided with the camera (18) that links to each other with computing machine (23) by lead.
According to the described vertical-shaft automobile tire of claim 1 at road moving characteristic simulation tester, it is characterized in that said pivot arm (11) is: center pivoted arm (11-5) is arranged on the main shaft (1), the end that screw rod (11-2) is adjusted on a left side is arranged on that center pivoted arm (11-5) is gone up, the other end is arranged on the flexible pivoted arm (11-1) in a left side, and the left end of the flexible pivoted arm (11-1) in a left side is provided with revolver axle (9), the middle part is provided with the Zola's force transducer (11-4) that is connected with computing machine (23) by lead; A right end of adjusting screw rod (11-7) is arranged on that center pivoted arm (11-5) is gone up, the other end is arranged on the right flexible pivoted arm (11-6), and the right-hand member of right flexible pivoted arm (11-6) is provided with right wheel shaft (20), the middle part is provided with the right pulling force sensor (11-8) that is connected with computing machine (23) by lead.
According to the described vertical-shaft automobile tire of claim 1 at road moving characteristic simulation tester, it is characterized in that: the distance that said audio sensor (10) is positioned at left automobile test wheel (8) and cylinder (7) surface of contact is 30～100mm place; The distance that said camera (18) is positioned at right automobile test wheel (21) and cylinder (7) surface of contact is 100～300mm place.
According to the described vertical-shaft automobile tire of claim 2 at road moving characteristic simulation tester, it is characterized in that: the stretch transversal section profile of pivoted arm (11-1), right flexible pivoted arm (11-6) of a said left side is a rectangle, inside surface with center pivoted arm (11-5) around flexible pivoted arm (11-1) transversal section, a left side is a clearance fit, and the inside surface with center pivoted arm (11-5) around right flexible pivoted arm (11-6) transversal section is a clearance fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920274895 CN201575922U (en) | 2009-12-31 | 2009-12-31 | On-road driving characteristics simulation test plant for vertical shaft type car tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920274895 CN201575922U (en) | 2009-12-31 | 2009-12-31 | On-road driving characteristics simulation test plant for vertical shaft type car tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201575922U true CN201575922U (en) | 2010-09-08 |
Family
ID=42695798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920274895 Expired - Fee Related CN201575922U (en) | 2009-12-31 | 2009-12-31 | On-road driving characteristics simulation test plant for vertical shaft type car tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201575922U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762397B (en) * | 2009-12-31 | 2011-07-20 | 长安大学 | Running characteristic simulation test device of vertical-shaft automobile tire on pavement |
| CN102721547A (en) * | 2012-06-11 | 2012-10-10 | 国家康复辅具研究中心 | Wheel-type stair climbing wheelchair fatigue testing machine |
| CN103547900A (en) * | 2011-03-25 | 2014-01-29 | 株式会社普利司通 | Method of determining the stress that should be applied to a tyre during a high-efficiency indoor endurance test |
-
2009
- 2009-12-31 CN CN 200920274895 patent/CN201575922U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762397B (en) * | 2009-12-31 | 2011-07-20 | 长安大学 | Running characteristic simulation test device of vertical-shaft automobile tire on pavement |
| CN103547900A (en) * | 2011-03-25 | 2014-01-29 | 株式会社普利司通 | Method of determining the stress that should be applied to a tyre during a high-efficiency indoor endurance test |
| CN103547900B (en) * | 2011-03-25 | 2016-06-15 | 株式会社普利司通 | The defining method of the stress in tire should be applied during efficient indoor endurance test |
| CN102721547A (en) * | 2012-06-11 | 2012-10-10 | 国家康复辅具研究中心 | Wheel-type stair climbing wheelchair fatigue testing machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101762393B (en) | Balance weight vehicle tire road moving characteristic simulation tester | |
| CN105277275B (en) | Automobile tire road rumble is test bed | |
| CN201575922U (en) | On-road driving characteristics simulation test plant for vertical shaft type car tire | |
| CN101762397B (en) | Running characteristic simulation test device of vertical-shaft automobile tire on pavement | |
| CN101949776B (en) | Six-degree-of-freedom tire tester | |
| CN109612929B (en) | Test device and method for researching friction characteristics between tire and actual road surface | |
| CN104142250B (en) | Vehicle tire noise testing system | |
| CN201575923U (en) | Characteristic simulation test device for automobile double tire with tracks running on road | |
| CN108613920B (en) | Simulation test device and method for researching friction process between tire and road surface | |
| CN105738127B (en) | A kind of tread rubber wear test equipment and its method of testing | |
| CN102401745A (en) | Equal-diameter inner and outer drum road surface simulation device | |
| CN107655825A (en) | A kind of rubber for tire high speed ice face frictional behavior test device | |
| CN207540795U (en) | A kind of 4 wheel driven Chassis dynamometer detection device for being applicable in different wheelbases | |
| CN204043930U (en) | A kind of vehicle tire noise test macro | |
| CN101762398B (en) | Device with track for simulation test on characteristics of double automobile tires running on pavement | |
| CN201583459U (en) | Shearing fatigue tester | |
| CN201583414U (en) | Driving-characteristics simulation test device for balanceweight vehicle tire on road surface | |
| CN205209630U (en) | Automobile tire road surface noise test test bench | |
| CN214584072U (en) | High-rotation-speed vertical shaft type automobile tire road surface running characteristic simulation test device | |
| CN102087229B (en) | Power assistance-free small-diameter pipe fitting rotation device used in X-ray real-time imaging | |
| CN101699243B (en) | Machine for testing reliability of service life of electromagnetic clutch bearing of automotive air conditioner | |
| CN206208385U (en) | A kind of device for road rumble detection | |
| CN201780212U (en) | Six-degree-of-freedom tire testing machine | |
| CN116465637A (en) | Automobile brake pipe endurance test machine | |
| CN103257656B (en) | The add load control of torque during constant speed drive's axle assembly circumferential clearance detects |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100908 Termination date: 20111231 |