CN103454090B - Engine test stand device - Google Patents
Engine test stand device Download PDFInfo
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- CN103454090B CN103454090B CN201310357400.3A CN201310357400A CN103454090B CN 103454090 B CN103454090 B CN 103454090B CN 201310357400 A CN201310357400 A CN 201310357400A CN 103454090 B CN103454090 B CN 103454090B
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Abstract
The embodiment of the invention discloses automatic adjusting mechanism, control cabinet and detection sensor above and below automatic adjusting mechanism above and below a kind of engine test stand device, including fore-stock base, after-poppet base, the first pillar, the second pillar, fore-stock top plate, after-poppet top plate, front and rear automatic adjusting mechanism, front end or so automatic adjusting mechanism, rear end or so automatic adjusting mechanism, front end, rear end；Detection sensor is used to detect end face plane degree and radially coaxial degree of the engine flywheel relative to dynamometer machine, and detection data are transferred into control cabinet；Control cabinet sends above and below corresponding regulating command to front and rear automatic adjusting mechanism, front end or so automatic adjusting mechanism, rear end or so automatic adjusting mechanism, front end automatic adjusting mechanism above and below automatic adjusting mechanism and rear end after being analyzed and processed to detection data.
Description
Technical field
The present invention relates to automobile test holder device, more particularly to a kind of engine test stand device.
Background technology
When engine does bench test, engine on testing stand support, and the flywheel end of engine is entered
Row plane and radial alignment, it is ensured that engine positions on support, stable.Test bracket top is first unclamped during traditional centering
Part clamp nut, beats support somewhere position to adjust engine location so that its flywheel end circular runout exists by iron hammer
Within 0.3mm, end face run-out is within 0.2mm.
Conventional engines test bracket to it is middle when, following two problems be present：First, constantly beaten during centering with iron hammer
Test bracket, cause the serious modification of test bracket and damage；2nd, engine is attached to using the detection termination of dial gauge during centering to fly
End face and axial plane are taken turns, test bracket is beaten by iron hammer to observe percentage meter reading, and strength is not when iron hammer beats test bracket
It is controllable, firmly cause very much at gauge outfit Oscillation Amplitude excessive greatly sometimes and damage dial gauge.Thus, conventional engines are in test bracket
On centering method both have impact on test period, be also easily damaged engine support and dial gauge, manual labor amount is big, influences hair
The experiment progress of motivation, efficiency are low.
The content of the invention
In view of this, it is necessary to which providing a kind of will not damage dial gauge, can mitigate manual labor amount and efficiency high is started
Machine test bracket device.The technical scheme is as follows：
A kind of engine test stand device, including it is fore-stock base, after-poppet base, the first pillar, the second pillar, preceding
Rack plate, after-poppet top plate, front and rear automatic adjusting mechanism, front end or so automatic adjusting mechanism, rear end or so automatic regulating machine
Structure, the upper and lower automatic adjusting mechanism in front end, rear end upper and lower automatic adjusting mechanism, control cabinet and detection sensor；First pillar
It is supported between the fore-stock base and the fore-stock top plate, second pillar is supported on the after-poppet base and institute
State between after-poppet top plate；The control cabinet respectively with the front and rear automatic adjusting mechanism, front end or so automatic adjusting mechanism, after
Holding left and right automatic adjusting mechanism, front end, automatic adjusting mechanism and detection sensor are electrical up and down for automatic adjusting mechanism, rear end up and down
Connection；The detection sensor is used to detect end face plane degree and radially coaxial degree of the engine flywheel relative to dynamometer machine, and
Detection data are transferred to the control cabinet；The control cabinet sends corresponding regulation and referred to after being analyzed and processed to detection data
Order to the front and rear automatic adjusting mechanism, front end or so automatic adjusting mechanism, rear end or so automatic adjusting mechanism, front end up and down from
Automatic adjusting mechanism above and below dynamic governor motion and rear end.
Compared to prior art, engine test stand device provided in an embodiment of the present invention is detected using detection sensor
Obtain data, then as corresponding to controlling control cabinet automatic adjusting mechanism to engine flywheel end face plane degree and it is radially coaxial spend into
Row automatically adjusts, with advantage at following three compared with conventional engines test bracket：Iron hammer is no longer used when one, centering
Test bracket is beaten, mitigates manual labor amount, and avoid the serious modification of test bracket and damage；Secondly, centering need to only detect biography
Sensor is attached to engine flywheel end face and axial plane, by engine test stand device, energy exactly, quickly and easily adjusts
Good flatness, after the completion of flatness adjustment, then through engine test stand device, energy exactly, quickly and easily adjust
Axiality, with the purpose concentric with the crankshaft center line of engine of the connection axis up to dynamometer machine, adjust efficiency high；Thirdly, start
Do not use dial gauge to carry out detection data when machine test bracket device carries out centering, during centering, but using detection sensor come
DATA REASONING is completed, so in the absence of dial gauge damage phenomenon.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow the above and other objects, features and advantages of the present invention can
Become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, describe in detail as follows.
Brief description of the drawings
Fig. 1 is the structural representation of engine test stand device in the embodiment of the present invention.
Fig. 2 is another structural representation of engine test stand device in the embodiment of the present invention.
Fig. 3 is the part-structure schematic diagram of each automatic adjusting mechanism in the embodiment of the present invention.
Fig. 4 is the one of which structural representation of front and rear automatic adjusting mechanism in the embodiment of the present invention.
Fig. 5 is the one of which structural representation of left and right automatic adjusting mechanism in the embodiment of the present invention.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined goal of the invention is taken, below in conjunction with
Accompanying drawing and preferred embodiment, to embodiment, structure, feature and its effect of the present invention, describe in detail as after.
Please join Fig. 1 and Fig. 2, engine test stand device 100 provided in an embodiment of the present invention include fore-stock base 11,
After-poppet base 12, the first pillar 21, the second pillar 22, fore-stock top plate 31, after-poppet top plate 32, front and rear automatic adjusting mechanism
41st, front end or so automatic adjusting mechanism 42, rear end or so automatic adjusting mechanism 43, front end upper and lower automatic adjusting mechanism 44, rear end
Upper and lower automatic adjusting mechanism 45, control cabinet 50 and detection sensor 60.
Fore-stock base 11 and after-poppet base 12 are in strip and are parallel to each other and are disposed on work top（Figure is not
Show）On.Chute 13 is provided with each bracket base 11,12 along its length.
The quantity of first pillar 21 be two and it is spaced be arranged on fore-stock base 11, the quantity of the second pillar 22
For two and spaced it is arranged on after-poppet base 12.Each pillar 21,22 is telescopic telescoping structure, including set
Cylinder 22a and loop bar 22b, loop bar 22b are in the sleeve 22a and can or inside retraction protruding relative to sleeve 22a.It is each
The bottom protrusion of pillar 21,22 is provided with sliding block（It is not shown）, sliding block stretched in the chute 13 on forward and backward bracket base 11,12
And can be moved along chute 13, each pillar 21,22 is slided along chute 13 on respective bracket base 11 or 12.
Fore-stock top plate 31 is arranged on the top of two the first pillars 21, two 21 common support front bracket tops of the first pillar
Plate 31.After-poppet top plate 32 is arranged on the top of two the second pillars 22, and two the second pillars 22 support after-poppet top plate jointly
32.Engine 80 to be tested is carried on fore-stock top plate 31 and after-poppet top plate 32, and being provided with fore-stock top plate 31 can
The gantry support 33 stretched out for the Flywheel disc 81 of the front end of engine 80, the rear end of engine 80 is formed with supporting plate 82, after-poppet
The support frame 34 for being available for supporting the placement of plate 82 is provided with top plate 32, makes the front support of engine 80 in fore-stock top plate 31
In plate face, the rear end of engine 80 is then supported on support frame 34 by supporting plate 82.
Front and rear automatic adjusting mechanism 41 be used for adjust the distance between fore-stock base 11 and after-poppet base 12, when after branch
In the case of the remains stationary of frame base 12, if fore-stock base 11 moves forward (now fore-stock base 11 and after-poppet bottom
Seat the distance between 12 becomes big) or be moved rearwards (now the distance between fore-stock base 11 and after-poppet base 12 diminish),
Respectively engine 80 will be driven to be moved forward or rearward, it is achieved thereby that front and rear regulation (i.e. along the figure X side to engine location
To).
Front end or so automatic adjusting mechanism 42 is used to adjust left and right shifting of two the first pillars 21 on fore-stock base 11
It is dynamic, two the first pillars 21 is moved to the left or to the right on fore-stock base 11 together, so as to realize to motor head
The left and right adjusting (i.e. the Y-direction along figure) of position.Rear end or so automatic adjusting mechanism 43 is used for two the second pillars 22 of regulation and existed
Moving left and right on after-poppet base 12, two the second pillars 22 are made to be moved to the left or to the right on after-poppet base 12 together,
So as to which the left and right adjusting (i.e. the Y-direction along figure) to engine rear end position can be realized.
Automatic adjusting mechanism 44 is used to adjust moving up and down for fore-stock top plate 31 up and down for front end, produces fore-stock top plate 31
Life moves up or down, so as to realize the regulation up and down (i.e. the Z-direction along figure) to motor head position.Above and below rear end
Automatic adjusting mechanism 45 is used to adjust moving up and down for after-poppet top plate 32, produces after-poppet top plate 32 and moves up or down
It is dynamic, so as to which the regulation up and down (i.e. the Z-direction along figure) to engine rear end position can be realized.It is each during upper and lower regulation
The loop bar 22b of pillar 21,22 relative to sleeve 22a it is protruding or retract.
In the present embodiment, each automatic adjusting mechanism 41,42,43,44,45 drives by motor and passes through adjusting screw
By the linear motion that the convert rotational motion of motor is each component, the displacement regulation of respective members is realized.Incorporated by reference to Fig. 3, often
One automatic adjusting mechanism 41,42,43,44,45 includes motor 46, worm screw 47, turbine 48 and regulation screw mandrel 49, wherein motor 46
It is connected with worm screw 47, turbine 48 is connected with regulation screw mandrel 49, and worm screw 47 cooperates with turbine 48.When motor 46 operates, electricity
Machine rotates through worm screw 47 with after the deceleration transmission of turbine 48, driving regulation screw mandrel 49 to rotate.Screw mandrel 49 is adjusted again with needing directly
Pass through threaded screw rod auxiliary driving between the component of line motion, you can driving respective members are for linear motion.
For example, Fig. 4 show the one of which structural representation of front and rear automatic adjusting mechanism 41, front and rear automatic adjusting mechanism
41, which include preceding fixed seat 410, rear fixed seat 411 and regulation screw mandrel 49, preceding fixed seat 410, is fixed on fore-stock base 11, after
Fixed seat 411 is fixed on after-poppet base 12.Adjust the one end of screw mandrel 49 away from motor 46 and form head 491, the head 491
Fixed seat 410 is interior before being caught in and can be rotated relative to preceding fixed seat 410, is provided with rear fixed seat 411 and coordinates with regulation screw mandrel 49
Screwed hole (not shown).When clockwise or inverse clock rotate regulation screw mandrel 49 in rear fixed seat 411, regulation screw mandrel 49 pushes away
Fixed seat 410 is moved forward or rearward before dynamic, and preceding fixed seat 410 drives fore-stock base 11 to be moved forward or rearward simultaneously, real
Now to the front and rear regulation of engine location.
And for example, Fig. 5 show the one of which structural representation, front end or so of front end or so automatic adjusting mechanism 42 automatically
Governor motion 42 includes the spaced fixed mount 422 of first fixed mount 421 and second of fixed seat 420, two and regulation silk
Bar 49.It is connected with each other and is respectively sleeved on two the first pillars 21 by connecting rod 423 between two fixed mount 421,422, Gu
Reservation 420 closes on the first fixed mount 421.Adjust the one end of screw mandrel 49 away from motor 46 and form head 491, the head 491 is caught in
It can rotate in first fixed mount 421 and relative to the first fixed mount 421, be provided with what is coordinated with regulation screw mandrel 49 in fixed seat 420
Screwed hole (not shown).When clockwise or inverse clock rotate regulation screw mandrel 49 in fixed seat 420, regulation screw mandrel 49 promotes two
Individual fixed mount 421,422 is mobile to the left or to the right, and two fixed mounts 421,422 drive two the first pillars 21 along chute simultaneously
13 slide to the left or to the right together on fore-stock base 11, realize the left and right adjusting to engine location.Rear end or so is automatic
The structure of the structure of governor motion 43 and above-mentioned front end or so automatic adjusting mechanism 42 is identical, rear end or so automatic adjusting mechanism 43
Two fixed mounts be respectively sleeved on two the second pillars 22.
Similarly, the structure of the upper and lower automatic adjusting mechanism 45 of the upper and lower automatic adjusting mechanism 44 in front end and rear end, which can also use, adjusts
The cooperation for saving screw mandrel 49 and screw thread is driven, and promotes fore-stock top plate 31 (or after-poppet top plate 32) to move up or down to reach
It is dynamic, so as to realize the regulation up and down to motor head position (or back-end location), will not be repeated here.
Control cabinet 50 is automatic with front and rear automatic adjusting mechanism 41, front end or so automatic adjusting mechanism 42, rear end or so respectively
Automatic adjusting mechanism 45 and detection sensor 60 electrically connect up and down for automatic adjusting mechanism 44, rear end up and down for governor motion 43, front end
Connect.When being arranged in engine test stand device 100 first time of engine 80, make dynamometer machine (not shown) to realize
Couple the axis purpose concentric with the crankshaft center line of engine, detection sensor 60 is arranged in fixing device 90, and fix
Device 90 is then on the coupling spindle of dynamometer machine.Detection sensor 60 can be laser range sensor or other be adapted to away from
From the sensor of sensing.
When carrying out centering to engine flywheel end using above-mentioned engine test stand device 100, engine 80 is installed
On test bracket, the front and rear automatic centering of test bracket is realized by front and rear automatic adjusting mechanism 41, by front end or so certainly
Dynamic governor motion 42 and rear end or so automatic adjusting mechanism 43 realizes the left and right automatic centering of test bracket, by front end up and down from
Automatic adjusting mechanism 45 realizes the automatic centering up and down of test bracket above and below dynamic governor motion 44 and rear end.
Specifically, when adjusting engine flywheel end face, detection sensor 60 is attached on flywheel end face, with the connection of dynamometer machine
Spindle turns around, and is carried out in the data transfer that detection sensor 60 measures to control cabinet 50, then through the system in control cabinet 50
Analyzing and processing, front and rear automatic adjusting mechanism 41 and rear end up and down automatic adjusting mechanism 45 and rear end or so automatic adjusting mechanism 43 with
After automatic adjusting mechanism 44 obtains instruction above and below front end, engine flywheel end face is adjusted into 0.2mm automatically.
Specifically, when adjusting engine flywheel circular runout, detection sensor 60 is attached to flywheel radially, with dynamometer machine
Coupling spindle turn around, in the data transfer that detection sensor 60 measures to control cabinet 50, then through the system in control cabinet 50
Analyzed and processed, after automatic adjusting mechanism 44 and front end or so automatic adjusting mechanism 42 obtains instruction above and below front end, automatically will
Engine flywheel circular runout is adjusted into 0.3mm.
Above-mentioned engine test stand device detects to obtain data using detection sensor, then as corresponding to controlling control cabinet
Automatic adjusting mechanism is automatically adjusted to engine flywheel end face plane degree and radially coaxial degree, and branch is tested with conventional engines
Frame is compared with advantage at following three：Test bracket no longer is beaten with iron hammer when one, centering, mitigates manual labor amount,
And avoid the serious modification of test bracket and damage；Secondly, centering only need detection sensor to be attached to engine flywheel end face and axial plane,
By engine test stand device, energy exactly, flatness is quickly and easily adjusted, after the completion of flatness adjustment, then
Through engine test stand device, can exactly, quickly and easily adjust axiality, with up to the connection axis of dynamometer machine with
The concentric purpose of the crankshaft center line of engine, adjusts efficiency high；Thirdly, engine test stand device carry out centering when, centering
When do not use dial gauge to carry out detection data, but DATA REASONING is completed using detection sensor, so dial gauge is not present
Damage phenomenon.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the technical spirit pair according to the present invention without departing from technical solution of the present invention content
Any simple modification, equivalent change and modification that above example is made, in the range of still falling within technical solution of the present invention.
Claims (8)
- A kind of 1. engine test stand device (100), it is characterised in that：Including fore-stock base (11), after-poppet base (12), the first pillar (21), the second pillar (22), fore-stock top plate (31), after-poppet top plate (32), front and rear automatic adjusting mechanism (41), front end or so automatic adjusting mechanism (42), rear end or so automatic adjusting mechanism (43), the upper and lower automatic adjusting mechanism in front end (44), automatic adjusting mechanism (45), control cabinet (50) and detection sensor (60), the detection sensor (60) are up and down for rear end Sensor for distance sensing；First pillar (21) is supported on the fore-stock base (11) and the fore-stock top plate (31) between, second pillar (22) is supported between the after-poppet base (12) and the after-poppet top plate (32), institute State the first pillar (21) and the second pillar (22) is telescopic telescoping structure, including sleeve (22a) and loop bar (22b), institute Loop bar (22b) is stated in the sleeve (22a) and can or inside retraction protruding relative to the sleeve (22a)；It is described Control cabinet (50) respectively with the front and rear automatic adjusting mechanism (41), front end or so automatic adjusting mechanism (42), rear end or so from Move governor motion (43), the upper and lower automatic adjusting mechanism (44) in front end, rear end automatic adjusting mechanism (45) and detection sensor up and down (60) it is electrically connected with；The detection sensor (60) is arranged in fixing device (90), and the fixing device (90), which is arranged on, surveys On the coupling spindle of work(machine, the detection sensor (60) be used to detect engine flywheel relative to the end face plane degree of dynamometer machine and Radially coaxial degree, the detection sensor (60) are turned around with the coupling spindle of the dynamometer machine and are transferred to detection data described Control cabinet (50)；The control cabinet (50) sends corresponding regulating command to described front and rear after being analyzed and processed to detection data Automatic adjusting mechanism (41), front end or so automatic adjusting mechanism (42), rear end or so automatic adjusting mechanism (43), front end up and down from Automatic adjusting mechanism (45) above and below dynamic governor motion (44) and rear end.
- 2. engine test stand device (100) as claimed in claim 1, it is characterised in that：First pillar (21) can It is slidably arranged on the fore-stock base (11), second pillar (22) is slidably disposed on the after-poppet base (12) on.
- 3. engine test stand device (100) as claimed in claim 2, it is characterised in that：The fore-stock base (11) Be respectively equipped with chute (13) on after-poppet base (12), the bottom difference of first pillar (21) and the second pillar (22) is convex Go out and be provided with sliding block, the sliding block is stretched in corresponding chute (13) and can moved along the chute (13).
- 4. engine test stand device (100) as claimed in claim 1, it is characterised in that：First pillar (21) Quantity be two and it is spaced be arranged on the fore-stock base (11), two the first pillars (21) support jointly it is described before Rack plate (31)；The quantity of second pillar (22) is two and spaced is arranged on the after-poppet base (12) On, two the second pillars (22) support the after-poppet top plate (32) jointly.
- 5. engine test stand device (100) as claimed in claim 1, it is characterised in that：The fore-stock top plate (31) It is provided with and is available for the gantry support (33) that the Flywheel disc (81) of engine (80) front end stretches out, the rear end shape of the engine (80) Into plate (82) is supported, the after-poppet top plate (32) is provided with support frame (34), and the front support of the engine (80) exists In the plate face of the fore-stock top plate (31), the rear end of the engine (80) is supported on the branch by the plate (82) that supports On support (34).
- 6. engine test stand device (100) as claimed in claim 1, it is characterised in that：Each automatic adjusting mechanism (41,42,43,44,45) include motor (46), worm screw (47), turbine (48) and regulation screw mandrel (49), the motor (46) with Worm screw (47) connection, the turbine (48) are connected with the regulation screw mandrel (49), the worm screw (47) and the turbine (48) cooperate.
- 7. engine test stand device (100) as claimed in claim 6, it is characterised in that：The front and rear automatic regulating machine Structure (41) also includes preceding fixed seat (410) and rear fixed seat (411), and the preceding fixed seat (410) is fixed on the fore-stock bottom On seat (11), the rear fixed seat (411) is fixed on the after-poppet base (12), the front and rear automatic adjusting mechanism (41) The one end of regulation screw mandrel (49) away from motor (46) form head (491), the head (491) is caught in the preceding fixed seat (410) it can rotate in and relative to the preceding fixed seat (410), be provided with after described in fixed seat (411) and the regulation screw mandrel (49) screwed hole coordinated.
- 8. engine test stand device (100) as claimed in claim 6, it is characterised in that：Automatically adjust described front end or so Saving mechanism (42) includes fixed seat (420) and two spaced first fixed mounts (421) and the second fixed mount (422), and two It is connected with each other and is respectively sleeved on two the first pillars (21) by connecting rod (423) between individual fixed mount (421,422), it is described The regulation screw mandrel (49) that fixed seat 420 closes on first fixed mount (421), the front end or so automatic adjusting mechanism (42) is remote One end from motor (46) forms head (491), and the head (491) is caught in first fixed mount (421) and can be relative Rotated in first fixed mount (421), the screw thread coordinated with the regulation screw mandrel (49) is provided with the fixed seat (420) Hole；The structure phase of the structure of the rear end or so automatic adjusting mechanism (43) and the front end or so automatic adjusting mechanism (42) Together, two fixed mounts of described rear end or so automatic adjusting mechanism (43) are respectively sleeved on two the second pillars (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310357400.3A CN103454090B (en) | 2013-08-16 | 2013-08-16 | Engine test stand device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310357400.3A CN103454090B (en) | 2013-08-16 | 2013-08-16 | Engine test stand device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103454090A CN103454090A (en) | 2013-12-18 |
| CN103454090B true CN103454090B (en) | 2018-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310357400.3A Active CN103454090B (en) | 2013-08-16 | 2013-08-16 | Engine test stand device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106403787B (en) * | 2016-08-29 | 2019-08-06 | 中航动力股份有限公司 | A kind of detection device for calibrating sensor for detecting Material Testing Machine concentricity |
| CN106122696B (en) * | 2016-08-30 | 2018-01-30 | 广西玉柴机器股份有限公司 | The mobile device of threst stand motor support seat |
| CN107860584A (en) * | 2017-10-26 | 2018-03-30 | 奇瑞汽车股份有限公司 | Engine centering adjusting device |
| CN110160797B (en) * | 2019-06-18 | 2021-01-29 | 广东华锐动力科技有限公司 | Engine detection box device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4551335B2 (en) * | 2006-01-26 | 2010-09-29 | 日立オートモティブシステムズ株式会社 | Reference position learning device for movable member |
| ES2324567B1 (en) * | 2006-04-07 | 2010-03-26 | Juan Pablo Corujo Tilve | SELF-SUPPORTING MACHINE TO DISPLACE VARIOUS TOOLS FACING A VERTICAL SURFACE. |
| JP4192996B1 (en) * | 2007-07-19 | 2008-12-10 | トヨタ自動車株式会社 | Unbalance correction device for high-speed rotating equipment |
| CN201673044U (en) * | 2010-02-23 | 2010-12-15 | 北汽福田汽车股份有限公司 | Aligning device and engine test bed comprising same |
| CN103249921B (en) * | 2010-12-27 | 2015-05-06 | 川崎重工业株式会社 | Reference angle detection device |
| CN102901633B (en) * | 2012-08-29 | 2015-04-22 | 长城汽车股份有限公司 | Quick centering device for engine pedestal test |
| CN202966482U (en) * | 2012-12-14 | 2013-06-05 | 常州市爱多动力科技有限公司 | Power-driven double arm brace |
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2013
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