CN201837529U - Combination property test-bed for disc brake - Google Patents
Combination property test-bed for disc brake Download PDFInfo
- Publication number
- CN201837529U CN201837529U CN2010205553376U CN201020555337U CN201837529U CN 201837529 U CN201837529 U CN 201837529U CN 2010205553376 U CN2010205553376 U CN 2010205553376U CN 201020555337 U CN201020555337 U CN 201020555337U CN 201837529 U CN201837529 U CN 201837529U
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- brake
- disc
- temperature sensor
- sensor
- transducer
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Abstract
The utility model relates to a combination property test-bed for a disc brake, mainly comprising a floating brake caliper, a brake disc, a friction plate provided with a temperature sensor, a fixed brake caliper, a hydraulic push cylinder, a moveable sleeve, a sensor support, a rotary speed sensor, a tyre, a torque sensor, a drum dynamometer machine, a displacement sensor, a guide support pillar, a hydraulic cylinder, a force sensor, a temperature measuring unit, a pressure sensor, a measuring and controlling system and a brake hydraulic unit. By using the combination property test-bed for the disc brake, anti-heat fading performance tests, researches on the attachment performance between the tyre and the ground and developmental researches on the ABS system (Anti-locked Braking System) etc. of the disc brake can be carried out, and the real braking condition of a vehicle can be better simulated; and by adopting the methods of replacing the tyre or the brake and modifying parameters of the drum dynamometer machine, brake simulation of various vehicles can be carried out, therefore, the combination property test-bed for the disc brake has the advantages of simple structure, multiple test functions, and the like.
Description
Technical field
The utility model relates to the equipment of testing brake performance, and it is comprehensive performance test bed to relate in particular to a kind of disc brake.
Background technology
Detent is important component part on the automobile, is vital safety feature, and the quality of its quality and performance has influence on traffic safety.Along with the development of society and the increase of vehicle society recoverable amount, the good braking ability of vehicle has caused the extensive concern of society, and travel safety is had higher requirement.
The performance performance assessment criteria of detent mainly contains three: the one, and brake efficiency is mainly examined braking distance and braking deceleration; The 2nd, the constancy of brake efficiency mainly is a heat resistanceheat resistant decline performance; The 3rd, the directional stability during braking.The test of detent mainly is to carry out on real vehicle now, inefficiency, and the cost height, and can't carry out vehicle development preceding performance test and check.The quality of detent brake efficiency depends primarily on two factors: the one, and brake braking force; The 2nd, the adhesion on tire and ground.Existing detent testing equipment can only detect the size of brake braking force, can't simulate the adhesion on tire and ground, can't detect the frictional heat performance and the heat resistanceheat resistant decline performance of detent, the heat of friction research to detent now mainly is based on Computer Simulation.Disc brake is widely used because of having better stability, in order better to study travel safety, a kind of brake efficiency and constant testing equipment of brake efficiency that can detect disc brake of necessary exploitation.
Summary of the invention
The deficiency that the utility model exists at existing testing equipment, provide a kind of disc brake comprehensive performance test bed, this testing table can detect the constancy of the brake efficiency and the brake efficiency of disc brake, for examination, evaluation, design disc brake provide data.
The present invention realizes by following technical measures:
Disc brake is comprehensive performance test bed, clamp by floating brake, brake disc, the right friction disc of band temperature sensor, the left friction disc of band temperature sensor, O-ring seal, fixing caliper, hydraulic pressure pushes away cylinder, fixed mount, transmission shaft, move cover, sensor stand, right bearing, speed probe, code-disc, tire, torque sensor, the rotary drum dynamometer machine, displacement transducer, right guide support column, left side guide support column, hydraulic cylinder, force transducer, temperature measuring unit, joint flange, fixed bar, right pressure transducer, left side pressure transducer, TT﹠C system, the brake fluid pressure unit is formed, the fixed mount fixed installation on the ground, fixedly caliper is installed on the fixed mount, the floating brake pincers are installed in fixedly and also can freely horizontally slip on the caliper, the left side of floating brake pincers is equipped with left pressure transducer, the left friction disc of band temperature sensor is installed on the pressure transducer of a left side, the right-hand member of floating brake pincers is equipped with hydraulic pressure and pushes away cylinder and adopt O-ring seal to seal, the end face that hydraulic pressure pushes away cylinder is equipped with right pressure transducer, the right friction disc of band temperature sensor is installed on the right pressure transducer, brake disc be installed on the joint flange by bolt and the card of brake disc between the left friction disc of the right friction disc of band temperature sensor and band temperature sensor, joint flange is fixedly mounted on the left end of transmission shaft, temperature measuring unit be fixedly mounted on the fixed mount by fixed bar and the thermometric face of temperature measuring unit parallel with the card of brake disc, transmission shaft is installed in to move by right bearing and left bearing and puts, move to put speed probe is installed, but moving cover is sleeved on right guide support column and the left guide support column by its sliding sleeve and the easy on and off slip, the lower end and the hydraulic cylinder that move cover are hinged, hydraulic cylinder by the force transducer fixed installation on the ground, displacement transducer is installed on the hydraulic cylinder, code-disc is fixedly mounted on the transmission shaft, torque sensor is installed on the transmission shaft, tire is fixed on the right-hand member of transmission shaft, tire is pressed on the cylinder of rotary drum dynamometer machine, the right friction disc of band temperature sensor, the left friction disc of band temperature sensor, temperature measuring unit, speed probe, the rotary drum dynamometer machine, displacement transducer, hydraulic cylinder, force transducer, right pressure transducer, left side pressure transducer, the brake fluid pressure unit all is electrically connected with TT﹠C system.
The above-mentioned rotary drum dynamometer machine of mentioning is known, can carry out measurement of power and road conditions simulation test to vehicle.
The beneficial effects of the utility model are: comprehensive performance test bed brake efficiency and the heat resistanceheat resistant decline performance that can test disc brake of disc brake, simulation by various road conditions loading forces and damping force, can more convenient research vehicle braking performances and research disc brake frictional heat performance, for the examination and test of products, exploitation provide the more data of science, take the method for re-type or detent, modification rotary drum dynamometer machine parameter just can carry out various vehicle braked simulations, have advantages such as simple in structure, that test function is many.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is a temp measuring system scheme of installation of the present utility model.
Fig. 3 is a TT﹠C system schematic diagram of the present utility model.
Among the figure: 1-floating brake pincers, 2-brake disc, the right friction disc of 3-band temperature sensor, the left friction disc of 3A-band temperature sensor, the 4-O-ring seal, 5-is caliper fixedly, 6-hydraulic pressure pushes away cylinder, 7-fixed mount, 8-transmission shaft, 9-moves cover, 10-sensor stand, 11-right bearing, the 11A-left bearing, 12-speed probe, 13-code-disc, the 14-tire, 15-torque sensor, 16-rotary drum dynamometer machine, the 17-displacement transducer, the right guide support column of 18-, 18A-left side guide support column, the 19-hydraulic cylinder, 20-force transducer, 21-temperature measuring unit, the 22-joint flange, 23-fixed bar, the right pressure transducer of 24-, 25-left side pressure transducer, 26-TT﹠C system, 27-brake fluid pressure unit.
Embodiment
For clearly demonstrating the technical characterstic of this programme,, and in conjunction with the accompanying drawings, this programme is set forth below by an embodiment.
Disc brake is comprehensive performance test bed, by floating brake pincers 1, brake disc 2, the right friction disc 3 of band temperature sensor, the left friction disc 3A of band temperature sensor, O-ring seal 4, fixedly caliper 5, hydraulic pressure pushes away cylinder 6, fixed mount 7, transmission shaft 8, move cover 9, sensor stand 10, right bearing 11, speed probe 12, code-disc 13, tire 14, torque sensor 15, rotary drum dynamometer machine 16, displacement transducer 17, right guide support column 18, left side guide support column 18A, hydraulic cylinder 19, force transducer 20, temperature measuring unit 21, joint flange 22, fixed bar 23, right pressure transducer 24, left side pressure transducer 25, TT﹠C system 26, brake fluid pressure unit 27 is formed, fixed mount 7 fixed installations on the ground, fixedly caliper 5 is installed on the fixed mount 7, floating brake pincers 1 are installed in fixedly and also can freely horizontally slip on the caliper 5, the left side of floating brake pincers 1 is equipped with left pressure transducer 25, the left friction disc 3A of band temperature sensor is installed on the pressure transducer 25 of a left side, the right-hand member of floating brake pincers 1 is equipped with hydraulic pressure and pushes away cylinder 6 and adopt O-ring seal 4 to seal, the end face that hydraulic pressure pushes away cylinder 6 is equipped with right pressure transducer 24, the friction disc 3 of band temperature sensor is installed on the right pressure transducer 24, brake disc 2 be installed on the joint flange 22 by bolt and the card of brake disc 2 the band temperature sensor right friction disc 3 and the band temperature sensor left friction disc 3A between, joint flange 22 is fixedly mounted on the left end of transmission shaft 8, temperature measuring unit 21 be fixedly mounted on the fixed mount 7 by fixed bar 23 and the thermometric face of temperature measuring unit 21 parallel with the card of brake disc 2, transmission shaft 8 is installed in by right bearing 11 and left bearing 11A and moves on the cover 9, move on the cover 9 speed probe 12 is installed, cover 9 is sleeved on right guide support column 18 by its sliding sleeve and left guide support column 18A goes up and easy on and off slides but move, the lower end and the hydraulic cylinder 19 that move cover 9 are hinged, hydraulic cylinder 19 by force transducer 20 fixed installations on the ground, displacement transducer 17 is installed on the hydraulic cylinder 19, code-disc 13 is fixedly mounted on the transmission shaft 8, torque sensor 15 is installed on the transmission shaft 8, tire 14 is fixed on the right-hand member of transmission shaft 8, tire 14 is pressed on the cylinder of rotary drum dynamometer machine 16, the right friction disc 3 of band temperature sensor, the left friction disc 3A of band temperature sensor, temperature measuring unit 21, speed probe 12, rotary drum dynamometer machine 16, displacement transducer 17, hydraulic cylinder 19, force transducer 20, right pressure transducer 24, left side pressure transducer 25, brake fluid pressure unit 27 all is electrically connected with TT﹠C system 26.
During test, TT﹠C system 26 is by gathering force transducer 20, the signal of displacement transducer 17 is realized the closed-loop control to hydraulic cylinder 19, hydraulic cylinder 19 moves up and down to tire 14 imposed loads by promoting to move cover 9, the adhesion on the variation of load and then simulation tire and ground in the simulating vehicle operational process, rotary drum dynamometer machine 16 adopts the mode of electric analogy to come the moment of inertia of simulating vehicle, rotary drum dynamometer machine 16 carries out the vehicle working condition simulation according to TT﹠C system 26 setup parameters, TT﹠C system 26 right pressure transducers 24 of collection and right pressure transducer 24 signals realize hydraulic pressure is pushed away the closed-loop control of cylinder 6, the simulating vehicle braking, TT﹠C system 26 is by gathering temperature measuring unit 21, the right friction disc 3 of band temperature sensor, the temperature signal of the left friction disc 3A of band temperature sensor is also stored, so that research damping force, coupled relation between heat of friction and the braking time.
This disc brake is comprehensive performance test bed can to carry out system development researchs such as disc brake heat resistanceheat resistant decline performance test, tire and the research of ground adhesion property, ABS, better the simulating vehicle braking is live, takes the method for re-type or detent, modification rotary drum dynamometer machine parameter just can carry out various vehicle braked simulations.
Claims (1)
1. disc brake is comprehensive performance test bed, by floating brake pincers (1), brake disc (2), the right friction disc (3) of band temperature sensor, the left friction disc (3A) of band temperature sensor, O-ring seal (4), fixing caliper (5), hydraulic pressure pushes away cylinder (6), fixed mount (7), transmission shaft (8), move cover (9), sensor stand (10), right bearing (11), speed probe (12), code-disc (13), tire (14), torque sensor (15), rotary drum dynamometer machine (16), displacement transducer (17), right guide support column (18), left side guide support column (18A), hydraulic cylinder (19), force transducer (20), temperature measuring unit (21), joint flange (22), fixed bar (23), right pressure transducer (24), left side pressure transducer (25), TT﹠C system (26), brake fluid pressure unit (27) is formed, fixed mount (7) fixed installation on the ground, fixedly caliper (5) is installed on the fixed mount (7), floating brake pincers (1) are installed in fixedly, and caliper (5) upward also can freely horizontally slip, the left side of floating brake pincers (1) is equipped with left pressure transducer (25), the left friction disc (3A) of band temperature sensor is installed on the left side pressure transducer (25), the right-hand member of floating brake pincers (1) is equipped with hydraulic pressure and pushes away cylinder (6) and adopt O-ring seal (4) to seal, the end face that hydraulic pressure pushes away cylinder (6) is equipped with right pressure transducer (24), the friction disc (3) of band temperature sensor is installed right pressure transducer 24), brake disc (2) is installed on the joint flange (22) by bolt and the card of brake disc (2) is positioned between the right friction disc (3) of being with temperature sensor and the left friction disc (3A) of being with temperature sensor, joint flange (22) is fixedly mounted on the left end of transmission shaft (8), it is characterized in that: temperature measuring unit (21) is fixedly mounted on by fixed bar (23) that fixed mount (7) is gone up and the thermometric face of temperature measuring unit (21) is parallel with the card of brake disc (2), transmission shaft (8) is installed in by right bearing (11) and left bearing (11A) and moves on the cover (9), move on the cover (9) speed probe (12) is installed, move cover (9) be sleeved on right guide support column (18) and left guide support column (18A) by its sliding sleeve but go up and the easy on and off slip, the lower end and the hydraulic cylinder (19) that move cover (9) are hinged, hydraulic cylinder (19) by force transducer (20) fixed installation on the ground, displacement transducer (17) is installed on the hydraulic cylinder (19), code-disc (13) is fixedly mounted on the transmission shaft (8), torque sensor (15) is installed on the transmission shaft (8), tire (14) is fixed on the right-hand member of transmission shaft (8), tire (14) is pressed on the cylinder of rotary drum dynamometer machine (16), the right friction disc (3) of band temperature sensor, the left friction disc (3A) of band temperature sensor, temperature measuring unit (21), speed probe (12), rotary drum dynamometer machine (16), displacement transducer (17), hydraulic cylinder (19), force transducer (20), right pressure transducer (24), left side pressure transducer (25), brake fluid pressure unit (27) all is electrically connected with TT﹠C system (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205553376U CN201837529U (en) | 2010-10-11 | 2010-10-11 | Combination property test-bed for disc brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205553376U CN201837529U (en) | 2010-10-11 | 2010-10-11 | Combination property test-bed for disc brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201837529U true CN201837529U (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205553376U Expired - Fee Related CN201837529U (en) | 2010-10-11 | 2010-10-11 | Combination property test-bed for disc brake |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288404A (en) * | 2011-08-11 | 2011-12-21 | 重庆长安汽车股份有限公司 | Temperature field and thermal elastic deformation test device for disc brake |
| CN102410930A (en) * | 2011-12-22 | 2012-04-11 | 浙江大学台州研究院 | Comprehensive test stand for performance and durability of brake caliper |
| CN103322098A (en) * | 2013-07-15 | 2013-09-25 | 泛博制动部件（苏州）有限公司 | Friction plate thickness simulator |
| CN103604555A (en) * | 2013-12-04 | 2014-02-26 | 中国飞机强度研究所 | Five-degree-of-freedom follow-up brake moment measurement device |
| CN103808519A (en) * | 2014-02-13 | 2014-05-21 | 西安航空制动科技有限公司 | Braking bench of high-speed train braking device |
| CN103940621A (en) * | 2014-04-29 | 2014-07-23 | 广西大学 | Hydraulic disc-type dynamometer |
| CN104535341A (en) * | 2015-01-23 | 2015-04-22 | 山东交通学院 | Multifunctional wheel tester |
| CN104614114A (en) * | 2015-02-13 | 2015-05-13 | 合肥万向钱潮汽车零部件有限公司 | Knuckle assembly brake caliper dragging torque detection device |
| CN104697695A (en) * | 2014-12-12 | 2015-06-10 | 湖北航特装备制造股份有限公司 | CBS assembly detection table |
| CN105004534A (en) * | 2015-08-12 | 2015-10-28 | 淄博萃智工业设计咨询有限公司 | Automobile brake tester roller with heating function and method for producing the same |
| CN105136478A (en) * | 2015-09-23 | 2015-12-09 | 中国煤炭科工集团太原研究院有限公司 | Totally-enclosed wet-type multi-disc brake performance test device |
| CN106768587A (en) * | 2017-03-09 | 2017-05-31 | 江苏省特种设备安全监督检验研究院 | Device and method for testing static braking force of low-speed shaft brake energy efficiency test |
| CN107764529A (en) * | 2017-09-19 | 2018-03-06 | 中国矿业大学 | A kind of disk brake frictional behaviour detection method of noise reduction process |
| CN108918313A (en) * | 2018-07-10 | 2018-11-30 | 安徽悦众车身装备有限公司 | A kind of detection device for automobile brake disc durability |
| CN109733970A (en) * | 2019-02-26 | 2019-05-10 | 广州广日电梯工业有限公司 | A kind of safety tongs friction Temperature Rise test device and its control method |
| CN110031144A (en) * | 2019-05-20 | 2019-07-19 | 江苏省特种设备安全监督检验研究院 | Multifunctional static braking moment test device and test method |
| CN111479729A (en) * | 2017-12-22 | 2020-07-31 | 罗伯特·博世有限公司 | Wheel torque sensor for highly automated driving vehicle |
| CN111795830A (en) * | 2020-05-25 | 2020-10-20 | 中国第一汽车股份有限公司 | Brake efficiency testing method |
| CN112798244A (en) * | 2020-12-25 | 2021-05-14 | 中国第一汽车股份有限公司 | Brake simulation detection device and method |
| CN112964481A (en) * | 2021-02-26 | 2021-06-15 | 蜂巢传动科技河北有限公司 | Detection mechanism and detection device for brake of AT transmission |
| CN113465936A (en) * | 2021-05-24 | 2021-10-01 | 西格迈股份有限公司 | Device and method for testing performance of floating brake disc with environment simulation box |
| CN113758726A (en) * | 2021-09-23 | 2021-12-07 | 同济大学 | Automobile disc brake performance test system and method based on multi-source load loading |
| CN113758724A (en) * | 2021-09-03 | 2021-12-07 | 奇瑞汽车股份有限公司 | Testing method for rust adhesion of friction plate and brake disc |
| CN113834597A (en) * | 2021-10-12 | 2021-12-24 | 中国汽车工程研究院股份有限公司 | Method for measuring and processing data of BTV (brake torque converter) of commercial vehicle disc brake assembly |
| CN114593912A (en) * | 2022-03-10 | 2022-06-07 | 一汽解放汽车有限公司 | Dynamic characteristic testing equipment and method for drum brake |
-
2010
- 2010-10-11 CN CN2010205553376U patent/CN201837529U/en not_active Expired - Fee Related
Cited By (33)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288404A (en) * | 2011-08-11 | 2011-12-21 | 重庆长安汽车股份有限公司 | Temperature field and thermal elastic deformation test device for disc brake |
| CN102410930A (en) * | 2011-12-22 | 2012-04-11 | 浙江大学台州研究院 | Comprehensive test stand for performance and durability of brake caliper |
| CN102410930B (en) * | 2011-12-22 | 2013-06-19 | 浙江大学台州研究院 | Comprehensive test stand for performance and durability of brake caliper |
| CN103322098B (en) * | 2013-07-15 | 2016-05-18 | 泛博制动部件（苏州）有限公司 | Friction plate thickness simulator |
| CN103322098A (en) * | 2013-07-15 | 2013-09-25 | 泛博制动部件（苏州）有限公司 | Friction plate thickness simulator |
| CN103604555A (en) * | 2013-12-04 | 2014-02-26 | 中国飞机强度研究所 | Five-degree-of-freedom follow-up brake moment measurement device |
| CN103808519A (en) * | 2014-02-13 | 2014-05-21 | 西安航空制动科技有限公司 | Braking bench of high-speed train braking device |
| CN103940621A (en) * | 2014-04-29 | 2014-07-23 | 广西大学 | Hydraulic disc-type dynamometer |
| CN104697695A (en) * | 2014-12-12 | 2015-06-10 | 湖北航特装备制造股份有限公司 | CBS assembly detection table |
| CN104697695B (en) * | 2014-12-12 | 2017-02-22 | 湖北航特装备制造股份有限公司 | Linkage brake system assembly detection table |
| CN104535341A (en) * | 2015-01-23 | 2015-04-22 | 山东交通学院 | Multifunctional wheel tester |
| CN104614114A (en) * | 2015-02-13 | 2015-05-13 | 合肥万向钱潮汽车零部件有限公司 | Knuckle assembly brake caliper dragging torque detection device |
| CN105004534A (en) * | 2015-08-12 | 2015-10-28 | 淄博萃智工业设计咨询有限公司 | Automobile brake tester roller with heating function and method for producing the same |
| CN105136478A (en) * | 2015-09-23 | 2015-12-09 | 中国煤炭科工集团太原研究院有限公司 | Totally-enclosed wet-type multi-disc brake performance test device |
| CN106768587A (en) * | 2017-03-09 | 2017-05-31 | 江苏省特种设备安全监督检验研究院 | Device and method for testing static braking force of low-speed shaft brake energy efficiency test |
| CN107764529A (en) * | 2017-09-19 | 2018-03-06 | 中国矿业大学 | A kind of disk brake frictional behaviour detection method of noise reduction process |
| CN111479729A (en) * | 2017-12-22 | 2020-07-31 | 罗伯特·博世有限公司 | Wheel torque sensor for highly automated driving vehicle |
| CN111479729B (en) * | 2017-12-22 | 2023-01-06 | 罗伯特·博世有限公司 | Wheel torque sensor for highly automated driving vehicle |
| CN108918313A (en) * | 2018-07-10 | 2018-11-30 | 安徽悦众车身装备有限公司 | A kind of detection device for automobile brake disc durability |
| CN108918313B (en) * | 2018-07-10 | 2020-09-22 | 普洛泰科莱生产线制造(佛山)有限公司 | Detection device for durability of automobile brake disc |
| CN109733970A (en) * | 2019-02-26 | 2019-05-10 | 广州广日电梯工业有限公司 | A kind of safety tongs friction Temperature Rise test device and its control method |
| CN110031144A (en) * | 2019-05-20 | 2019-07-19 | 江苏省特种设备安全监督检验研究院 | Multifunctional static braking moment test device and test method |
| CN111795830A (en) * | 2020-05-25 | 2020-10-20 | 中国第一汽车股份有限公司 | Brake efficiency testing method |
| CN112798244A (en) * | 2020-12-25 | 2021-05-14 | 中国第一汽车股份有限公司 | Brake simulation detection device and method |
| CN112798244B (en) * | 2020-12-25 | 2023-02-21 | 中国第一汽车股份有限公司 | Brake simulation detection device and method |
| CN112964481A (en) * | 2021-02-26 | 2021-06-15 | 蜂巢传动科技河北有限公司 | Detection mechanism and detection device for brake of AT transmission |
| CN113465936A (en) * | 2021-05-24 | 2021-10-01 | 西格迈股份有限公司 | Device and method for testing performance of floating brake disc with environment simulation box |
| CN113758724A (en) * | 2021-09-03 | 2021-12-07 | 奇瑞汽车股份有限公司 | Testing method for rust adhesion of friction plate and brake disc |
| CN113758726A (en) * | 2021-09-23 | 2021-12-07 | 同济大学 | Automobile disc brake performance test system and method based on multi-source load loading |
| CN113834597A (en) * | 2021-10-12 | 2021-12-24 | 中国汽车工程研究院股份有限公司 | Method for measuring and processing data of BTV (brake torque converter) of commercial vehicle disc brake assembly |
| CN113834597B (en) * | 2021-10-12 | 2024-03-26 | 中国汽车工程研究院股份有限公司 | Measurement and data processing method for BTV of commercial vehicle disc brake assembly |
| CN114593912A (en) * | 2022-03-10 | 2022-06-07 | 一汽解放汽车有限公司 | Dynamic characteristic testing equipment and method for drum brake |
| CN114593912B (en) * | 2022-03-10 | 2024-01-16 | 一汽解放汽车有限公司 | Dynamic characteristic test equipment and test method for drum brake |
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