CN114674556A - Test device for testing vibration noise of automobile transmission - Google Patents
Test device for testing vibration noise of automobile transmission Download PDFInfo
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- CN114674556A CN114674556A CN202210298602.4A CN202210298602A CN114674556A CN 114674556 A CN114674556 A CN 114674556A CN 202210298602 A CN202210298602 A CN 202210298602A CN 114674556 A CN114674556 A CN 114674556A
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- 238000012360 testing method Methods 0.000 title claims abstract description 60
- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 238000013016 damping Methods 0.000 claims abstract description 18
- 238000010168 coupling process Methods 0.000 claims description 24
- 238000005859 coupling reaction Methods 0.000 claims description 24
- 230000007246 mechanism Effects 0.000 claims description 17
- 230000008878 coupling Effects 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 4
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 230000003028 elevating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 230000035939 shock Effects 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/028—Acoustic or vibration analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- Acoustics & Sound (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a test device for testing vibration noise of an automobile transmission. The two sides of the bottom of the base are fixedly provided with horizontal adjusting devices, the horizontal adjusting devices comprise anti-skidding blocks, threaded rods and bubble levels, the threaded rods are matched with the bubble levels for use, and the testing device can be quickly leveled on the uneven ground. The driving motor can realize lifting motion along with the lifting platform, the output shaft of the driving motor and the input shaft of the tested speed changer are centered on the horizontal height, and a damping spring is fixedly arranged in the lifting platform, so that the stability of the working platform is ensured. The coupler comprises a shockproof pad, wherein the shockproof pad is positioned between the left half coupler and the right half coupler and is used for relieving vibration and impact generated by the driving motor in a high-speed operation process, so that an experimental result is more accurate.
Description
Technical Field
The invention relates to the technical field of test and test, in particular to a test device for testing vibration noise of an automobile transmission.
Background
The automobile transmission may have abnormal vibration and noise in the operation of the automobile under complicated conditions due to the imperfection of the design and manufacture process, which seriously affects the comfort of the driver and passengers. For the above reasons, the vibration noise test of the transmission of the automobile before the automobile is shipped out of the factory has become an indispensable part of the automobile production process.
The existing test devices for testing the vibration noise of the automobile transmission are various, but the test devices are all built on a bottom plate, sometimes the bottom plate is not in a horizontal state due to unevenness of the ground, so that the stability of the test devices is influenced, and most of the existing test devices have the problem of inconvenience in adjustment, so that the height of a driving motor cannot be adjusted according to the use condition, and the operation of workers is inconvenient; the vibration that driving motor produced at the during operation can pass through the shaft coupling and transmit automotive transmission, can lead to the experimental result to appear the deviation, and driving motor can produce certain impact load at high-speed operation in-process, produces the injury to the part on the shaft coupling, has seriously influenced the life of shaft coupling, so provides a test device for testing automotive transmission vibration noise and solves the above-mentioned problem that provides.
Disclosure of Invention
The purpose of the invention is as follows:
in order to overcome the defects of the prior art, the invention provides the test device for testing the vibration noise of the automobile transmission, the test device can be quickly leveled on the uneven ground by adjusting the threaded rod, the height of the driving motor is adjusted, the output shaft of the driving motor and the input shaft of the tested automobile transmission are ensured to be aligned on the horizontal height, the vibration and impact generated in the high-speed operation process of the driving motor are relieved, the test result is more accurate, and the coupler and the rotating shaft can be effectively protected.
The technical scheme adopted by the invention is as follows:
a test device for testing vibration noise of an automobile transmission comprises a base, wherein a first chute and a second chute are respectively arranged on the left side and the right side inside the base, a first hydraulic cylinder and a second hydraulic cylinder are respectively and fixedly arranged on the left side and the right side inside the first chute, a first slider is fixedly arranged on the top of the first hydraulic cylinder, a second slider is fixedly arranged on the top of the second hydraulic cylinder, a third hydraulic cylinder and a fourth hydraulic cylinder are respectively and fixedly arranged on the left side and the right side inside the second chute, a third slider is fixedly arranged on the top of the third hydraulic cylinder, a fourth slider is fixedly arranged on the top of the fourth hydraulic cylinder, the first slider and the second slider are connected with the bottom of a first shear type lifting mechanism, the second slider and the fourth slider are connected with the bottom of a second shear type lifting mechanism, and the bottoms of the second hydraulic cylinder and the third hydraulic cylinder are respectively connected with a first limiting block, the horizontal adjusting devices are fixedly arranged on two sides of the bottom of the base and comprise threaded rods, the bottoms of the threaded rods are connected with the anti-skid blocks through bearings, bubble levels are fixedly arranged at the tops of the threaded rods, the threaded rods are connected with threaded holes in the base, lifting platforms are fixedly arranged above the first shear type lifting mechanisms and the second shear type lifting mechanisms, first movable grooves are formed in the middles of the insides of the lifting platforms, damping springs are fixedly arranged at the bottoms of the first movable grooves, movable plates are fixedly arranged at the tops of the damping springs, limiting rods with one ends penetrating through and extending to the outsides of the movable plates are fixedly arranged between the tops of the first movable grooves and the sides opposite to the bottoms of the tops of the first movable grooves, supporting rods with one ends penetrating through and extending to the outsides of the lifting platforms are fixedly arranged at the tops of the movable plates, working platforms are fixedly arranged at the tops of the supporting rods, the lifting platform is characterized in that four fixing grooves are formed in the periphery of the interior of the lifting platform, one end of each fixing rod penetrates through and extends to the interior of each fixing groove, four fixing rods are fixedly mounted at the bottom of each fixing rod, a second limiting block is movably connected with the bottom of each fixing groove, a driving motor is fixedly mounted above the working platform, an output shaft of the driving motor is connected with a coupler, the coupler comprises a shockproof pad, and the shockproof pad is located between the left half coupler and the right half coupler and fixedly connected with the left half coupler and the right half coupler through fixing bolts.
Further, the first sliding groove and the second sliding groove are arranged in bilateral symmetry.
Furthermore, the bottom of the threaded rod is spherical and is connected with the bearing.
Furthermore, the threaded rod, the bearing, the antiskid block and the bubble level meter are a group of horizontal adjusting devices, and the test device comprises 4 groups of horizontal adjusting devices which are respectively connected with 4 threaded holes in the base.
Further, damping spring's quantity is two sets of, every group damping spring's quantity is six and be both ends around the first activity tank bottom portion of symmetric distribution.
Further, a second movable groove matched with the size of the limiting rod is formed in the movable plate, movable holes matched with the size of the four fixing rods are formed in the top of the lifting platform, the movable holes are distributed in a central symmetry mode relative to the limiting rod, and the size of each movable hole is smaller than that of the second limiting block.
Further, the driving motor can lift along with the lifting platform.
Furthermore, the shockproof pad is composed of a shockproof ring and an inner ring cotton pad, the shockproof ring and the inner ring cotton pad are circular, and the diameter of the shockproof ring is equal to the outer diameter of the joint of the coupler.
Furthermore, the shockproof ring is provided with two connecting holes corresponding to the fixing bolts.
The invention has the beneficial effects that:
1. according to the test device, the threaded rod is connected with the bearing through the ball head, so that the antiskid block and the bearing can be ensured to rotate a certain amount around the ball head of the threaded rod, when the test device is placed on uneven ground, the antiskid block can be ensured to be always in positive pressure on the ground, the threaded rod is matched with the bubble level meter for use, when the test device is inclined, the bubble level meter can be inclined, the height of the position relative to other positions can be judged through the bubble position on the bubble level meter, and the test device can be quickly leveled on the uneven ground by rotating the threaded rod;
2. according to the test device, the lifting platform drives the working platform to lift, so that a worker can freely adjust the height of the driving motor, and the output shaft of the driving motor and the input shaft of the tested automobile transmission are conveniently aligned on the horizontal height;
3. according to the test device, the damping spring is arranged, so that most force can be absorbed by the damping spring through the support rod and the movable plate when vibration occurs, the movable plate cannot deflect through the limiting rod, the stability of the working platform is guaranteed, and the working platform is supported through the fixing rod and the second limiting block, so that the whole structure is more stable;
4. according to the test device, the shaft coupling is provided with the shock pad, so that vibration and impact generated in the high-speed operation process can be relieved, and the shaft coupling and the rotating shaft are effectively protected.
Drawings
FIG. 1 is a schematic structural diagram of a test apparatus according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the test apparatus of FIG. 1 according to the embodiment of the present invention;
FIG. 3 is an enlarged schematic view of the testing apparatus shown in FIG. 1 according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a crash pad according to an embodiment of the invention.
In the figure: 1-a base, 2-a first hydraulic cylinder, 3-a first slide block, 4-a first scissor type lifting mechanism, 5-a first sliding groove, 6-a second slide block, 7-a second hydraulic cylinder, 8-a first limit block, 9-a third hydraulic cylinder, 10-a third slide block, 11-a second sliding groove, 12-a fourth slide block, 13-a fourth hydraulic cylinder, 14-a threaded rod, 15-a bearing, 16-an anti-slip block, 17-a bubble level gauge, 18-a second scissor type lifting mechanism, 19-a lifting platform, 20-a first movable groove, 21-a damping spring, 22-a movable plate, 23-a limit rod, 24-a support rod, 25-a working platform, 26-a driving motor, 27-a fixed groove, 28-a fixed rod, 29-a second limit block, 30-left half coupling, 31-right half coupling, 32-fixing bolt, 33-shockproof pad, 331-shockproof ring, 332-inner ring cotton pad, 333-connecting hole.
Detailed Description
The present invention is described in further detail below.
For the convenience of understanding the technical content of the present invention, the technical solutions in the embodiments of the present invention will be further described below with reference to the drawings in the embodiments of the present invention. In the description of the present invention, it should be noted that the terms "front", "rear", "upper", "lower", "left", "right", "center", and the like, which represent the orientation or positional relationship, are all set forth based on the orientation or positional relationship shown in the drawings, and are only for convenience of description, and they should not be construed as limiting the technical contents of the present invention; the terms "first," "second," "third," and "fourth" are used merely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations, and should not be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to the attached drawings 1-4 of the specification, the test device for testing the vibration noise of the automobile transmission comprises a base (1), wherein a first sliding groove (5) and a second sliding groove (11) are respectively formed in the left side and the right side of the interior of the base (1), the first sliding groove (5) and the second sliding groove (11) are arranged in a bilateral symmetry mode, a first hydraulic cylinder (2) and a second hydraulic cylinder (7) are respectively and fixedly installed on the left side and the right side of the interior of the first sliding groove (5), a first sliding block (3) is fixedly installed at the top of the first hydraulic cylinder (2), a second sliding block (6) is fixedly installed at the top of the second hydraulic cylinder (7), a third hydraulic cylinder (9) and a fourth hydraulic cylinder (13) are respectively and fixedly installed on the left side and the right side of the interior of the second sliding groove (11), a third sliding block (10) is fixedly installed at the top of the third hydraulic cylinder (9), and a fourth sliding block (12) is fixedly installed at the top of the fourth hydraulic cylinder (13), the first slider (3) and the second slider (6) are connected with the bottom of a first shear type lifting mechanism (4), the second slider (10) and the fourth slider (12) are connected with the bottom of a second shear type lifting mechanism (18), the bottoms of the second hydraulic cylinder (7) and the third hydraulic cylinder (9) are respectively connected with a first limiting block (8), horizontal adjusting devices are fixedly arranged on two sides of the bottom of the base (1) and comprise a threaded rod (14), the bottom of the threaded rod (14) is connected with an anti-slip block (16) through a bearing (15), a bubble level gauge (17) is fixedly arranged at the top of the threaded rod (14), the threaded rod (14) is connected with a threaded hole in the base (1), a lifting platform (19) is fixedly arranged above the first shear type lifting mechanism (4) and the second shear type lifting mechanism (18), and a first movable groove (20) is formed in the middle of the lifting platform (19), the bottom fixed mounting of first activity groove (20) has damping spring (21), the quantity of damping spring (21) is two sets of, every group damping spring (21) the quantity be six and be both ends around the first activity groove (20) bottom of symmetric distribution, the top fixed mounting of damping spring (21) has fly leaf (22), the second activity groove with gag lever post (23) size looks adaptation is seted up to the inside of fly leaf (22), the movable orifice with four dead lever (28) size looks adaptations is seted up at the top of lift platform (19) and is central symmetric distribution about gag lever post (23), the size of movable orifice is less than the size of second stopper (29), fixed mounting has one end to run through and extend to the gag lever post (23) outside fly leaf (22) between the relative one side in first activity groove (20) top and bottom, the top of the movable plate (22) is fixedly provided with a support rod (24) with one end penetrating through and extending to the outside of the lifting platform (19), the top of the support rod (24) is fixedly provided with a working platform (25), four fixing grooves (27) are formed in the periphery of the inside of the lifting platform (19), the bottom of the working platform (25) is fixedly provided with fixing rods (28) with one end penetrating through and extending to the inside of the four fixing grooves (27), the bottoms of the four fixing rods (28) are fixedly provided with second limiting blocks (29) movably connected with the bottoms of the fixing grooves (27), and the damping springs (21) are arranged, so that when vibration occurs, most of force can be absorbed by the damping springs (21) through the support rod (24) and the movable plate (22), and the movable plate (22) cannot deviate due to the arrangement of the limiting rods (23), the stability of the working platform (25) is guaranteed, and the working platform (25) is supported by the fixing rod (28) and the second limiting block (29), so that the whole structure is more stable. Work platform (25) top fixed mounting has driving motor (26), the output shaft of driving motor (26) links to each other with the shaft coupling, the shaft coupling includes shock pad (33), shock pad (33) are located between left half-coupling (30) and right half-coupling (31), through fixing bolt (32) with left half-coupling (30) and right half-coupling (31) fixed connection.
Specifically, when using, threaded rod (14), bearing (15), non slipping spur (16), bubble level meter (17) are a set of horizontal adjusting device, and this test device includes 4 horizontal adjusting device groups, respectively with 4 screw hole connections on base (1) use threaded rod (14) and bubble level meter (17) cooperation, when the test device slope, can lead to the slope of bubble level meter (17), can judge the height condition of this position for other positions through the bubble position on bubble level meter (17), and adjust threaded rod (14) according to the judged result, until the bubble position on every bubble level meter (17) is placed in the middle, can judge that the test device is the horizontality.
Specifically, when the height of the driving motor (26) needs to be adjusted, the first hydraulic cylinder (2) and the second hydraulic cylinder (7) which are fixed on the left side and the right side inside the first sliding chute (5), and the third hydraulic cylinder (9) and the fourth hydraulic cylinder (13) which are fixed on the left side and the right side inside the second sliding chute (11) move to push the first sliding block (3), the second sliding block (6), the third sliding block (10) and the fourth sliding block (12) to move so as to drive the first shear type lifting mechanism (4) and the second shear type lifting mechanism (18) to move up and down, the first scissor type lifting mechanism (4) and the second scissor type lifting mechanism (18) drive the lifting platform (19) to move up and down, the driving motor (26) moves up and down along with the lifting platform (19), the height adjustment of the driving motor (26) can be completed, and the output shaft of the driving motor (26) and the input shaft of the tested automobile transmission are ensured to be aligned on the horizontal height.
Specifically, when using, will be surveyed the automotive transmission input shaft and arrange in the central point of left side half-coupling (30) puts, will driving motor (26) output shaft is arranged in the central point of right half-coupling (31) puts, shaft coupling junction is arranged in shock pad (33), connecting hole (333) that fixing bolt (32) passed set up on shockproof circle (331) with shaft coupling fixed connection, through being provided with shock pad (33), can alleviate the vibration and the impact that high-speed operation in-process produced for the experimental result is more accurate, and can effectively protect shaft coupling and pivot.
Claims (9)
1. The utility model provides a test device for testing automotive transmission vibration noise, includes base (1), its characterized in that: first spout (5), second spout (11) have been seted up respectively to the inside left and right sides of base (1), first spout (5) inside left and right sides fixed mounting respectively has first pneumatic cylinder (2), second pneumatic cylinder (7), first pneumatic cylinder (2) top fixed mounting has first slider (3), second pneumatic cylinder (7) top fixed mounting has second slider (6), the inside left and right sides of second spout (11) fixed mounting respectively has third pneumatic cylinder (9), fourth pneumatic cylinder (13), third pneumatic cylinder (9) top fixed mounting has third slider (10), fourth pneumatic cylinder (13) top fixed mounting has fourth slider (12), first slider (3), second slider (6) link to each other bottom first formula elevating system (4) of cutting, second slider (10), The fourth sliding block (12) is connected with the bottom of the second shear type lifting mechanism (18), the bottoms of the second hydraulic cylinder (7) and the third hydraulic cylinder (9) are respectively connected with the first limiting block (8), horizontal adjusting devices are fixedly installed on two sides of the bottom of the base (1) and comprise a threaded rod (14), the bottom of the threaded rod (14) is connected with an anti-slip block (16) through a bearing (15), a bubble level gauge (17) is fixedly installed at the top of the threaded rod (14), the threaded rod (14) is connected with a threaded hole in the base (1), a lifting platform (19) is fixedly installed above the first shear type lifting mechanism (4) and the second shear type lifting mechanism (18), a first movable groove (20) is formed in the middle of the inner part of the lifting platform (19), and a damping spring (21) is fixedly installed at the bottom of the first movable groove (20), the top fixed mounting of damping spring (21) has fly leaf (22), fixed mounting has one end to run through and extend to fly leaf (22) outside gag lever post (23) between the relative one side in first activity groove (20) top and bottom, the top fixed mounting of fly leaf (22) has one end to run through and extend to the outside bracing piece (24) of lift platform (19), the top fixed mounting of bracing piece (24) has work platform (25), set up fixed slot (27) that quantity is four around lift platform (19) is inside, the bottom fixed mounting of work platform (25) has one end to run through and extend to dead lever (28) inside four fixed slots (27), four the equal fixed mounting in bottom of dead lever (28) has with fixed slot (27) bottom swing joint's second stopper (29), fixed mounting has driving motor (26) above work platform (25), the output shaft of driving motor (26) links to each other with the shaft coupling, the shaft coupling includes crash pad (33), crash pad (33) are located between left half-coupling (30) and right half-coupling (31), through fixing bolt (32) with left half-coupling (30) and right half-coupling (31) fixed connection.
2. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: the first sliding chute (5) and the second sliding chute (11) are arranged in a bilateral symmetry manner.
3. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: the bottom of the threaded rod (14) is spherical and is connected with the bearing (15).
4. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: threaded rod (14), bearing (15), non slipping spur (16), bubble spirit level (17) are a set of horizontal adjusting device, and this test device includes 4 horizontal adjusting device of group, respectively with 4 screw hole on base (1) are connected.
5. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: the quantity of damping spring (21) is two sets of, every group damping spring (21)'s quantity is six and be both ends around the first activity groove (20) bottom of symmetric distribution.
6. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: the inside of fly leaf (22) is seted up with the second activity groove of gag lever post (23) size looks adaptation, the top of lift platform (19) is seted up with the activity hole of four dead lever (28) size looks adaptations and is central symmetry distribution about gag lever post (23), the size in activity hole is less than the size of second gag lever post (29).
7. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: the driving motor (26) can lift along with the lifting platform (19).
8. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: the shockproof pad (33) is composed of a shockproof ring (331) and an inner ring cotton pad (332), the shockproof ring (331) and the inner ring cotton pad (332) are circular, and the diameter of the shockproof ring (331) is equal to the outer diameter of the joint of the coupler.
9. A test apparatus for testing vibration noise of an automotive transmission according to claim 1, characterized in that: two connecting holes (333) corresponding to the fixing bolts (32) are formed in the shockproof ring (331).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210298602.4A CN114674556A (en) | 2022-03-25 | 2022-03-25 | Test device for testing vibration noise of automobile transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210298602.4A CN114674556A (en) | 2022-03-25 | 2022-03-25 | Test device for testing vibration noise of automobile transmission |
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| Publication Number | Publication Date |
|---|---|
| CN114674556A true CN114674556A (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210298602.4A Pending CN114674556A (en) | 2022-03-25 | 2022-03-25 | Test device for testing vibration noise of automobile transmission |
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| CN (1) | CN114674556A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205483579U (en) * | 2016-01-19 | 2016-08-17 | 武汉理工大学 | Car test bench leveling strutting arrangement |
| CN111024378A (en) * | 2019-12-04 | 2020-04-17 | 扬州知行动力科技有限公司 | Test bench of motor controller |
| CN113063558A (en) * | 2021-04-09 | 2021-07-02 | 哈尔滨理工大学 | Vibration test bench for automobile transmission |
| CN113310836A (en) * | 2021-06-18 | 2021-08-27 | 安徽丰豪冷却***有限公司 | Cold-heat impact and vibration resistance test device for automobile radiator |
| WO2021238192A1 (en) * | 2020-05-26 | 2021-12-02 | 昆山双桦自动化科技有限公司 | Liftable base for robot |
-
2022
- 2022-03-25 CN CN202210298602.4A patent/CN114674556A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205483579U (en) * | 2016-01-19 | 2016-08-17 | 武汉理工大学 | Car test bench leveling strutting arrangement |
| CN111024378A (en) * | 2019-12-04 | 2020-04-17 | 扬州知行动力科技有限公司 | Test bench of motor controller |
| WO2021238192A1 (en) * | 2020-05-26 | 2021-12-02 | 昆山双桦自动化科技有限公司 | Liftable base for robot |
| CN113063558A (en) * | 2021-04-09 | 2021-07-02 | 哈尔滨理工大学 | Vibration test bench for automobile transmission |
| CN113310836A (en) * | 2021-06-18 | 2021-08-27 | 安徽丰豪冷却***有限公司 | Cold-heat impact and vibration resistance test device for automobile radiator |
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Application publication date: 20220628 |
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