CN1869628A - Test stage for detecting noise of rear axle - Google Patents
Test stage for detecting noise of rear axle Download PDFInfo
- Publication number
- CN1869628A CN1869628A CNA2006100881052A CN200610088105A CN1869628A CN 1869628 A CN1869628 A CN 1869628A CN A2006100881052 A CNA2006100881052 A CN A2006100881052A CN 200610088105 A CN200610088105 A CN 200610088105A CN 1869628 A CN1869628 A CN 1869628A
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Abstract
The invention is a rear axle noise quality detection test-bed, characterized in that it is composed of power input, bed body fastening and flexible connection parts, where the power input part is composed of driving motor and driving mechanism and is arranged on a power sliding table able to horizontally slide back and forth; the bed body fastening part uses a rigid reflecting plate as a bed body, and microphones are arranged in set positions around the detected rear axle above the bed body, two side bed frames for fastening the detected rear axle are of multi-layer structure, the bottom layer is adjustable-width horizontal shifting frame, the middle layer is a lift frame and the top layer is an adjustable-inclination fastener seat; the flexible connection part is connected between the power input shaft of the detected rear axle and the power output shaft of the driving motor. And it is used for fast on-line rear axle noise detection.
Description
Technical field:
The present invention relates to noise-measuring system, the automobile drive axle of more specifically saying so, the noise-measuring system of abbreviation back axle.
Background technology:
Back axle is the critical piece of car transmissions, and its braking ability obtains enough attention of people, and has developed corresponding detecting system.Yet along with developing of automobile industry, people have higher requirement to the automobile noise index, and China has also revised the automobile noise standard again.The factor that influences the car load noise level is a lot, and wherein the noise of back axle is one of key factor that can not be ignored.But, lack in the prior art a kind ofly use flexibly, can the online device that quick and precisely detects rear-axle whine.
Summary of the invention:
The present invention is for avoiding above-mentioned existing in prior technology weak point, a kind of test stage for detecting noise of rear axle that is specifically designed to the on-line quick detection rear-axle whine being provided.
The technical scheme that technical solution problem of the present invention is adopted is:
Design feature of the present invention is made up of power importation, stage body clamping part and flexible connection part;
Described power importation is made of drive motor and gear train, and be arranged on can before and after on the power slide of horizontal sliding;
Described stage body clamping part is a stage body with the rigidity reflector plate, the top of stage body is provided with each microphone around tested vehicle bridge by desired location, the both sides stand that is used for the tested vehicle bridge of clamping is a sandwich construction, its bottom is the broad-adjustable frame that moves horizontally, the middle level is to be arranged on the crane that moves horizontally on the frame, top layer is the clamping fixture seat that is arranged on the tilt adjustable on the crane, and anchor clamps are installed on the clamping fixture seat;
Described flexible connection part is connected between the power output shaft of the power input shaft of tested vehicle bridge and drive motor.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, power of the present invention importation is by driving motor supplies power, and drive part can move on power slide, is very easy to the connection between vehicle bridge power input shaft and the drive motor power output shaft.
2, the stage body clamping among the present invention partly is the main part of testing table, realize installation, location, the clamping of vehicle bridge, and realize the translation of vehicle bridge on both direction and angular setting in one direction, thereby can adapt to the vehicle bridge of different model by adjusting gear.
3, the present invention fixedly mounts each microphone on stage body, can effectively improve the accuracy to the vehicle bridge noise measurement.
4, the present invention can adopt flexible the connection between tested vehicle bridge power input shaft and drive motor power output shaft, and this connecting mode can compensate the coaxiality error of diaxon when connecting, and can significantly reduce transfer of vibration.
Description of drawings:
Fig. 1 looks synoptic diagram for general structure master of the present invention.
Fig. 2 is a general structure schematic top plan view of the present invention.
Fig. 3 is a power of the present invention importation structural representation.
Fig. 4 is a clamp structure synoptic diagram of the present invention.
Fig. 5 moves horizontally the shelf structure synoptic diagram for the present invention.
Fig. 6 is the supplemental support master of a mechanism TV structure synoptic diagram of the present invention.
Fig. 7 is a supplemental support mechanism side TV structure synoptic diagram of the present invention.
Fig. 8 is the unsteady supporting bar structure synoptic diagram of the present invention.
Number in the figure: 1 drive motor, 2 power slides, 3 stage bodies, 4 tested vehicle bridge, 51 the place ahead microphones, 52 rear microphones, 53 top microphones, 6 move horizontally frame, 7 cranes, 81 upper jaw, 82 bottom V-blocks, 9 clamping fixture seats, 10 sound proof housings, 11 slide blocks, 12 horizontal guide rails, 13 slide unit motors, 14 slide unit leading screws, 15 feed screw nuts, 16 clamp lever, 17 fulcrums, 18 cylinder piston rods, 19 hoistable platforms, 20 longitudinally guiding bars, 21 elevating levers, 22 base for supporting, 23 ring flange locating pieces, 24 unsteady support bars, 25 carriages, 26 pressing plates, 27 press the frame support, 28 springs, 29 wedge-shaped slots, 30 locking pin rods, 31 screw-thread bushes, 32 handwheels, 33 plum blossom shaft couplings, 34 intermediate shafts, 35 snakelike shaft couplings, 36 mounting flanges, 37 transmission pins, 38 slide unit pedestals, 39 angular setting screw rods, 40 manually rotate nut, 41 slide unit flat boards, 42 sliding shoes, 43 rail plates, 44 winds.
Below by embodiment the present invention is further described:
Embodiment:
Referring to Fig. 1, Fig. 2, present embodiment is made up of power importation, stage body clamping part and flexible connection part;
Wherein, the power importation is made of drive motor 1 and gear train, and be arranged on can before and after on the power slide 2 of horizontal sliding; Stage body clamping part is a stage body 3 with the rigidity reflector plate, the top of stage body 3 is provided with each microphone around tested vehicle bridge 4 by desired location, the both sides stand that is used for the tested vehicle bridge 4 of clamping is a sandwich construction, its bottom is the broad-adjustable frame 6 that moves horizontally, the middle level is to be arranged on the crane 7 that moves horizontally on the frame 6, top layer is the clamping fixture seat 9 that is arranged on the tilt adjustable on the crane, and anchor clamps are installed on the clamping fixture seat 9; Flexible connection part is connected between the power output shaft of the power input shaft of tested vehicle bridge 4 and drive motor 1.
Referring to Fig. 2, Fig. 3, drive motor 1 adopts the low noise frequency modulation motor, and is fixedly installed on the power slide 2, at the outer setting sound proof housing 10 of drive motor 1; Power slide 2 is bearing in along on the axial horizontal guide rail 12 that is provided with of drive motor power output shaft by slide block 11, and slide unit motor 13 is set, and its output shaft links to each other with slide unit leading screw 14, and feed screw nut 15 is fixedly installed on the power slide 2.
In concrete the enforcement, slide block 11 is formed high precision guide rail slide block mechanism, interior ball and water in the slide block 11 with horizontal guide rail 12
The side of level gauge 12 is higher pair contacts, guarantees that friction is little when mobile, Oscillation Amplitude is little, motion is smooth and easy.Slide unit motor 13 is selected AC brake motor, and the mobile power that provides of power slide 2 is provided.The output shaft of slide unit motor 13 links to each other with slide unit leading screw 14 by shaft coupling, and slide unit leading screw 14 is arranged on the slide unit pedestal 38 by the leading screw support, and the rotation of slide unit motor 13 is the rectilinear motion of power slide 2 by feed screw nut 15 transmissions.Slide unit motor 13 has stable braking ability, adds the self-locking property between lead screw 14 and the feed screw nut 15, can guarantee power slide 2 fast braking, and has reliable stability after stopping.Output shaft and the shaft coupling between the slide unit leading screw 14 at slide unit motor 13 are selected folder shell-type shaft coupling; meeting reason such as barrier when power slide moves causes load unusual; can produce and skid; lose anastomosis, thereby the feed screw nut gear train that protection is made up of slide unit leading screw 14 and feed screw nut 15 does not make its destruction.In order to reduce the interference to detection signal of extraneous vibration and noise, noise elimination protective cover 10 is made up of zinc-plated aluminium sheet, microperforated panel, sound absorption cotton and sheet steel from inside to outside.
Referring to Fig. 1, Fig. 2 and Fig. 4, anchor clamps 8 are the clamp systems that are made of upper jaw 81 and bottom V-block 82, the end that clamp lever 16, upper jaw 81 are located at clamp lever 16 is set, and clamp lever 16 is a fulcrum 17 with its middle part, and the other end connects with cylinder piston rod 18.
One width of cloth is respectively arranged about clamp system, utilize lever principle to clamp tested vehicle bridge by anchor clamps 8, place its bottom V-block 82 to carry out pre-determined bit tested vehicle bridge, cylinder piston rod 18 promotes clamp lever 16, and drives upper jaw 81 and move down, thereby compresses vehicle bridge.
As Fig. 4, shown in Figure 5, clamping fixture seat 9 is arranged on single-ended adjustable for height inclination angle adjustment rack on the hoistable platform 19, its single-ended height adjustment mechanism by the angular setting screw rod 39 of an end that is bearing in clamping fixture seat with manually rotate nut 40 and constitute.
Referring to Fig. 1, Fig. 2 and Fig. 5, the clamping width adjusting mechanism adopts screw-nut body, is to be symmetrical set on stage body 3, is made up of slide unit flat board 41, sliding shoe 42, rail plate 43 and a pair of screw pair, and the leading screw afterbody connects wind 44.The contacts side surfaces of sliding shoe 42 inner balls and rail plate 43, when guaranteeing move left and right motion smooth and easy stable, friction force is little.Utilize the self-locking property of feed screw nut to guarantee the stability of this part structure when measuring.Wind 44 can freely be dismantled, the obstacle when having reduced personnel operation.Manually rotate wind 44, left and right sides translation can take place in slide unit flat board 41, thereby drives other mechanism's integral left right translation on the slide unit flat board 41.
Referring to Fig. 6, Fig. 7 and Fig. 8, tested vehicle bridge power input shaft supplemental support mechanism is set, be on stage body 3, to fixedly install base for supporting 22, on base for supporting 22, fixedly install ring flange locating piece 23 and unsteady support bar 24, the top of unsteady support bar 24 is tested bridge axle housing carriage 25, the top of carriage 25 is a pressing plate 26, plate bracket 27 is fixedly installed on the base for supporting 22, the support bar 24 that floats is supported on the spring 28 with its bottom and forms resiliency supported, at the sidepiece of support bar 24 that floats, along gradually dark from top to bottom wedge-shaped slot 29 is set on its axis direction, locking pin rod 30 radially is inserted in the wedge-shaped slot 29 along the support bar 24 that floats, locking pin rod 30 is a screw rod, its screw-thread bush 31 is fixedly installed on the base for supporting 22, and the afterbody of locking pin rod 30 connects handwheel 32.
Ring flange locating piece 23 is used for locating tested vehicle bridge input shaft end face of flange, guarantees that the output shaft of this input shaft and drive motor 1 keeps certain right alignment.When handwheel 32 unclamps, float support bar 24 under the effect of spring 28, upwards jack-up.When effect on the carriage 25 has weight, the support bar 24 because 30 lockings of locking pin rod are floated, therefore, weight of heavy is born by spring 28, and this moment, total constituted a resiliency supported.Rotation hand wheel 32 utilizes friction force in wedge-shaped slot 29 support bar 24 that floats axially to be locked by locking pin rod 30, makes total be converted into a fixed support.Auxiliary positioning, support and the pressuring action of vehicle bridge when measuring installation mainly plays in supplemental support mechanism.Tested vehicle bridge at first is placed on its power input shaft ring flange in the ring flange locating piece 23 when mounted; When drive motor 1 by flexible connection part with after ring flange connects, ring flange can break away from ring flange locating piece 23, at this moment, the support bar 24 of floating supports vehicle bridge power output shaft shell from below; Rotation hand wheel 32, the unsteady support bar 24 of locking; Rotate pressing plate 26 again and push down tested vehicle bridge output shaft shell upper, and the rotation nut compresses it, thereby clamp tested vehicle bridge power input shaft shell, guarantee that it can not rotate when measuring.
Referring to Fig. 1, Fig. 2, in concrete the enforcement, at the vehicle bridge noise, be centered around on the diverse location of tested vehicle bridge 4, three the place ahead microphones 51, two rear microphones 52 and two top microphones 53 are set respectively, wherein, the place ahead microphone 51 and rear microphone 52 are fixedly installed on the stage body 3 by fixed support, and top microphone 53 is by being arranged on the stage body 3 to the runing rest that a side turns under rotary cylinder drives.Two top microphones 53 adopt rotatable mode, drive the turning rack rotation by rotary cylinder, and two pairs of microphones that are positioned at the vehicle bridge top can be left or the return measurement position, thereby make things convenient for the vehicle bridge loading and unloading.
Referring to Fig. 3, flexible connection part is the flexible shaft parts, form by two shaft couplings and intermediate shaft, the output shaft of drive motor 1 connects with intermediate shaft 34 by plum blossom shaft coupling 33, intermediate shaft 34 connects with mounting flange 36 by snakelike shaft coupling 35, be evenly distributed with transmission pin 37 on the mounting flange 36, corresponding what be provided with is pin hole on the tested vehicle bridge input shaft flange, is inserted in described transmission pin 37 and realizes power transmission in the pin hole.
During measurement, slide unit motor 13 high speed rotating drive power slide 2 and move to desired location, and at this moment, the transmission pin 37 on the coupling flange dish 36 is near vehicle bridge power input shaft end face of flange.Manual rotation coupling flange dish 36 makes the transmission pin 37 on it align with pin hole on the vehicle bridge power input shaft end face of flange.Drive power slide 2 by slide unit motor 13 low speed rotation again and move to test position, in the pin hole on the transmission this moment pin 37 insertion vehicle bridge power input shaft end face of flange, the end face of coupling flange dish 37 and vehicle bridge power input shaft end face of flange are fitted.Measurement finishes, and 13 reverse rotations of slide unit motor drive power slide 2 and retreat, and transmission pin 37 breaks away from the pin hole on the vehicle bridge power input shaft end face of flange.
Operating process:
1, energized, testing table preheating 5～10 minutes;
2, rotation hand wheel 32, unclamp the support bar 24 that floats, and guarantee that drive motor 1 return;
3, rotate to horizontal level with the balance crane tested back axle of slinging, and with tested back axle;
4, tested back axle is slowly put down, when treating, vehicle bridge power input shaft ring flange with under the hand, is guaranteed that ring flange at place, ring flange locating piece 23 centers, slowly is placed on vehicle bridge on the bottom V-block 82 of stage body clamping part then near flange locating piece 23;
5, drive slide unit motor 13, coupling flange dish 36 advances near vehicle bridge power input shaft ring flange place and stops automatically;
6, manually rotate coupling flange dish 36, four transmission pins of its end face are aimed at four pin holes on the vehicle bridge power input shaft ring flange;
7, drive slide unit motor 13, put in place until advancing, this moment, vehicle bridge power input shaft flange broke away from ring flange locating piece 23;
8, rotation hand wheel 32, the unsteady support bar 24 of locking, and cylinder piston rod 18 promotes upper jaw 81 and clamps vehicle bridge, compresses with pressing plate 26;
9, adjust runing rest, make two top microphones 53 rotate to the measuring position, begin to measure.Drive motor 1 is rotated in the forward with 500rpm, 1000rpm, 2200rpm respectively, and when low speed with the 500rpm reverse rotation, measure the noise figure under these several speed.If noise exceeds standard, then drive motor 1 increases progressively with even acceleration of 0～2200rpm, with the even rotation of successively decreasing of slowing down in 2200rpm～0, measures corresponding noise figure and vibration values again, carries out fault diagnosis.
10, after measurement finishes, 13 reverse rotations of slide unit motor, transmission pin 37 breaks away from the pin hole on the vehicle bridge power input shaft end face of flange;
11, unclamp pressing plate, unclamp unsteady support bar, two the top microphone reset, hang vehicle bridge;
12, the measurement of next chassis bridge is carried out in the operation of repeating step 3～11.
Claims (9)
1, test stage for detecting noise of rear axle is characterized in that being made up of power importation, stage body clamping part and flexible connection part;
Described power importation is made of drive motor (1) and gear train, and be arranged on can before and after on the power slide (2) of horizontal sliding;
Described stage body clamping part is stage body (3) with the rigidity reflector plate, the top of stage body (3) is provided with each microphone around tested vehicle bridge (4) by desired location, the both sides stand that is used for the tested vehicle bridge of clamping (4) is a sandwich construction, its bottom is the broad-adjustable frame (6) that moves horizontally, the middle level is for being arranged on the crane (7) that moves horizontally on the frame (6), top layer is the clamping fixture seat (9) that is arranged on the tilt adjustable on the crane, and anchor clamps are installed on the clamping fixture seat (9);
Described flexible connection part is connected between the power output shaft of the power input shaft of tested vehicle bridge (4) and drive motor (1).
2, testing table according to claim 1 is characterized in that described drive motor (1) is fixedly installed on the power slide (2), at the outer setting sound proof housing (10) of drive motor (1); Power slide (2) is bearing in along on the axial horizontal guide rail (12) that is provided with of drive motor power output shaft by slide block (11), slide unit motor (13) is set, the output shaft of slide unit motor (13) links to each other with slide unit leading screw (14), and feed screw nut (18) is fixedly installed on the power slide (2).
3, testing table according to claim 1, it is characterized in that described anchor clamps constitute clamp system by upper jaw (81) and bottom V-block (82), clamp lever (16) is set, described upper jaw (81) is located at an end of clamp lever (16), clamp lever (16) is fulcrum (17) with its middle part, and the other end connects with cylinder piston rod (18).
4, testing table according to claim 3, it is characterized in that described clamping fixture seat (9) is arranged on the single-ended adjustable for height inclination angle adjustment rack on the hoistable platform (19), its single-ended height adjustment mechanism is made of an end angular setting screw rod (39) that is bearing in clamping fixture seat (9) and manual rotation nut (40).
5, testing table according to claim 3 is characterized in that described crane (7) is be arranged in parallel in the bottom of hoistable platform (19) longitudinally guiding bar (20) and elevating lever (21).
6, testing table according to claim 1 is characterized in that cooperating for feed screw nut described moving horizontally between frame (6) and the stage body (3).
7, testing table according to claim 1, it is characterized in that being provided with tested vehicle bridge power input shaft supplemental support mechanism, be on stage body (3), to fixedly install base for supporting (22), on described base for supporting (22), fixedly install ring flange locating piece (23) and unsteady support bar (24), the top of unsteady support bar (24) is a tested bridge axle housing carriage (25), the top of carriage (25) is pressing plate (26), plate bracket (27) is fixedly installed on the base for supporting (22), described unsteady support bar (24) is supported on spring (28) with its bottom and goes up the formation resiliency supported, sidepiece at described unsteady support bar (24), along gradually dark from top to bottom wedge-shaped slot (29) is set on its axis direction, locking pin rod (30) radially is inserted in the wedge-shaped slot (29) along the support bar (24) that floats, described locking pin rod (30) is a screw rod, its screw-thread bush (31) is fixedly installed on the base for supporting (22), and the afterbody of locking pin rod (30) connects handwheel (32).
8, testing table according to claim 1, it is characterized in that described each microphone on the diverse location of tested vehicle bridge (4) comprises the place ahead microphone (51), rear microphone (52) and top microphone (53), wherein, the place ahead microphone (51) and rear microphone (52) are fixedly installed on the stage body (3) by fixed support, and described top microphone (53) is arranged on the stage body (3) by runing rest.
9, testing table according to claim 1, it is characterized in that described flexible connection part is the flexible shaft parts, form by two shaft couplings and intermediate shaft, the output shaft of drive motor (1) connects with intermediate shaft (34) by plum blossom shaft coupling (33), intermediate shaft (34) connects with mounting flange (36) by snakelike shaft coupling (35), mounting flange (36) is evenly distributed with transmission pin (37), corresponding what be provided with is pin hole on the tested vehicle bridge input shaft flange, is inserted in described transmission pin (37) and transmits power in the pin hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100881052A CN100494946C (en) | 2006-06-26 | 2006-06-26 | Test stage for detecting noise of rear axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100881052A CN100494946C (en) | 2006-06-26 | 2006-06-26 | Test stage for detecting noise of rear axle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1869628A true CN1869628A (en) | 2006-11-29 |
| CN100494946C CN100494946C (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100881052A Expired - Fee Related CN100494946C (en) | 2006-06-26 | 2006-06-26 | Test stage for detecting noise of rear axle |
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| Country | Link |
|---|---|
| CN (1) | CN100494946C (en) |
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| CN102829983A (en) * | 2012-09-18 | 2012-12-19 | 安徽安凯福田曙光车桥有限公司 | Detection device for running of axle assembly of passenger car |
| CN102950170A (en) * | 2012-10-24 | 2013-03-06 | 芜湖可挺汽车底盘件有限公司 | Device for detecting rear axle of car |
| CN102981189A (en) * | 2012-11-30 | 2013-03-20 | 中国石油天然气集团公司 | Assembled test platform rack |
| CN103344441A (en) * | 2013-07-14 | 2013-10-09 | 湖北精川智能装备股份有限公司 | Heavy load automotive rear axle wheel side comprehensive experiment table |
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| CN102536167A (en) * | 2010-12-07 | 2012-07-04 | 中国石油天然气股份有限公司 | Single-crank stepless speed regulation walking beam type water pump |
| CN102536167B (en) * | 2010-12-07 | 2015-05-06 | 中国石油天然气股份有限公司 | Single-crank stepless speed regulation walking beam type water pump |
| CN102607862B (en) * | 2012-03-25 | 2014-12-17 | 山东水泊焊割设备制造有限公司 | Axle testing machine |
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| CN102829983A (en) * | 2012-09-18 | 2012-12-19 | 安徽安凯福田曙光车桥有限公司 | Detection device for running of axle assembly of passenger car |
| CN102950170A (en) * | 2012-10-24 | 2013-03-06 | 芜湖可挺汽车底盘件有限公司 | Device for detecting rear axle of car |
| CN102981189A (en) * | 2012-11-30 | 2013-03-20 | 中国石油天然气集团公司 | Assembled test platform rack |
| CN103344441A (en) * | 2013-07-14 | 2013-10-09 | 湖北精川智能装备股份有限公司 | Heavy load automotive rear axle wheel side comprehensive experiment table |
| CN103543009A (en) * | 2013-08-22 | 2014-01-29 | 浙江中柴机器有限公司 | Gearbox test bed |
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| CN103940617A (en) * | 2014-04-03 | 2014-07-23 | 郑州精益达汽车零部件有限公司 | Axle running-in table |
| CN103940617B (en) * | 2014-04-03 | 2016-12-07 | 郑州精益达汽车零部件有限公司 | A kind of vehicle bridge running-in platform |
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| CN106768939A (en) * | 2016-12-15 | 2017-05-31 | 苏州微著设备诊断技术有限公司 | Gearbox noise abnormality detection attention device |
| CN106769086A (en) * | 2016-12-15 | 2017-05-31 | 苏州微著设备诊断技术有限公司 | Drive axle cacophonia detects alarm equipment |
| CN106679996A (en) * | 2017-03-09 | 2017-05-17 | 湖北车桥有限公司 | Automobile front axle running-in test bed |
| CN107907350A (en) * | 2017-12-30 | 2018-04-13 | 浙江联宜电机有限公司 | Scooter drive axle load simulating device |
| CN107976324A (en) * | 2017-12-30 | 2018-05-01 | 浙江联宜电机有限公司 | Scooter drive axle differential load simulating device |
| CN107907350B (en) * | 2017-12-30 | 2024-03-29 | 浙江联宜电机有限公司 | Load simulator for drive axle of scooter |
| CN112816223A (en) * | 2020-12-31 | 2021-05-18 | 格源动力有限公司 | Test bed for testing electric drive axle |
| CN114199564A (en) * | 2021-12-14 | 2022-03-18 | 方盛车桥(合肥)有限公司 | Drive axle noise and lubrication testing device |
| CN114199564B (en) * | 2021-12-14 | 2024-05-24 | 方盛车桥(合肥)有限公司 | Drive axle noise and lubrication testing device |
| CN114034496A (en) * | 2022-01-07 | 2022-02-11 | 江苏华永复合材料有限公司 | Universal axle automatic test bed |
| CN117782432A (en) * | 2024-02-23 | 2024-03-29 | 润华汽车控股有限公司 | Dynamic balance comprehensive test system for automobile front axle assembly |
| CN117782432B (en) * | 2024-02-23 | 2024-05-24 | 润华汽车控股有限公司 | Dynamic balance comprehensive test system for automobile front axle assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100494946C (en) | 2009-06-03 |
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