CN116551643B - Mechanical equipment convenient to new energy automobile maintenance - Google Patents
Mechanical equipment convenient to new energy automobile maintenance Download PDFInfo
- Publication number
- CN116551643B CN116551643B CN202310557157.3A CN202310557157A CN116551643B CN 116551643 B CN116551643 B CN 116551643B CN 202310557157 A CN202310557157 A CN 202310557157A CN 116551643 B CN116551643 B CN 116551643B
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- China
- Prior art keywords
- maintenance
- wall
- grooves
- lifting
- pit
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- 238000012423 maintenance Methods 0.000 title claims abstract description 98
- 230000008439 repair process Effects 0.000 claims abstract description 3
- 238000004804 winding Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 abstract description 7
- 101150054854 POU1F1 gene Proteins 0.000 description 16
- 241000219098 Parthenocissus Species 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000000116 mitigating effect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
- B25H5/00—Tool, instrument or work supports or storage means used in association with vehicles; Workers' supports, e.g. mechanics' creepers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
Abstract
The invention belongs to the technical field of automobile maintenance, and particularly relates to mechanical equipment convenient for new energy automobile maintenance, which comprises a maintenance pit, wherein two wheel supporting grooves are formed in the upper end positions of the front inner wall and the rear inner wall of the maintenance pit, four wheel supporting grooves are rectangular, fork-shaped lifters are arranged in the wheel supporting grooves, supporting plates are arranged at the upper ends of the fork-shaped lifters, the supporting plates are matched with the wheel supporting grooves and are rectangular, two lifting grooves which are arranged at left and right intervals are vertically formed in the front inner wall and the rear inner wall of the maintenance pit, and fixing plates are fixedly connected to the positions, close to the inner top wall, of the lifting grooves. The advantages are that: maintenance staff has carried out the maintenance work of new energy automobile bottom with two kinds of maintenance modes of standing position or lying position in the maintenance pit for maintenance staff can be comfortable in the maintenance pit keep in repair and change such as power supply part, lighten the damage to neck and waist.
Description
Technical Field
The invention relates to the technical field of automobile maintenance, in particular to mechanical equipment convenient for new energy automobile maintenance.
Background
The new energy automobile is an automobile which adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel automobile-mounted power device) and integrates the advanced technology in the aspects of power control and driving of the automobile, and the formed technical principle is advanced, and the automobile has a new technology and a new structure.
The chassis of the automobile is used as an important part in a new energy automobile, and consists of a transmission system, a driving system, a steering system and a braking system, the chassis has the functions of supporting and installing an automobile engine and parts and assemblies thereof, and most of power supplies of the new energy automobile are also arranged on the chassis of the automobile, so that the maintenance and battery replacement work of the new energy automobile are mainly applied to the bottom of the automobile. Because new energy automobile chassis is lower, need use the lifting device to jack up automobile chassis when carrying out maintenance work, make it unsettled, then the manual work alright use the removal service creeper get into the automobile bottom, carry out maintenance work, this mode is although can conveniently carry out maintenance work, but because the whole unsettled factor of lifting device has, can't ensure maintenance personnel's installation, and the maintenance space is little, be inconvenient for carrying out battery or part's change, and some auto repair pit, stop the vehicle to the pit top after, maintenance personnel only need descend to the pit in alright maintenance work to the vehicle bottom, and the maintenance space is big, be fit for the change of spare part and battery, but long-time back head work causes too big burden to people's head and neck easily, and the pit can't carry out the change of running wheel and shock mitigation system's maintenance work.
In order to solve the problems, a mechanical device convenient for new energy automobile maintenance is provided.
Disclosure of Invention
The invention aims to solve the problems in the background technology and provides mechanical equipment convenient for the maintenance of new energy automobiles.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a mechanical equipment convenient to new energy automobile maintenance, includes the maintenance pit, two wheel supporting grooves have all been seted up to inner wall upper end position around the maintenance pit, four wheel supporting grooves are the rectangle setting, and each wheel supporting inslot is all installed fork lifter, the backup pad is installed to fork lifter upper end, the backup pad matches with wheel supporting groove shape and all is the rectangle, two vertically seting up the lift groove that the interval set up about all on the inner wall around the maintenance pit, the fixed plate is connected with to the position that is close to and is close to interior roof in the lift groove, jointly rotate between fixed plate and the interior bottom wall of lift groove and be connected with the threaded rod, fixed plate upper end fixed mounting has the motor that drives the rotation of corresponding threaded rod, four in the lift groove all sliding connection has the lifter, the lifter cover is established on the threaded rod and with threaded connection, four between the lifter is fixedly connected with the lifter frame jointly, transversely set up the removal spout on the inner wall around the lifter frame, be equipped with the service creeper between two in the removal spout, the service creeper is connected with two in the two respectively at the corresponding both ends of sliding connection between the service creeper;
The maintenance pit is characterized in that two end blocks are fixedly connected to the front inner wall and the rear inner wall of the maintenance pit, four end blocks are fixedly provided with hydraulic cylinders, telescopic ends of the hydraulic cylinders are fixedly connected with jacking blocks, the jacking blocks are embedded in the maintenance pit, screw grooves are formed in one ends, far away from the inner wall of the maintenance pit, of the jacking blocks, and vehicle body lifting pieces are arranged between every two jacking blocks.
In the mechanical equipment convenient for new energy automobile maintenance, the right side wall of the maintenance pit is provided with the stairs.
In the mechanical equipment convenient for the maintenance of the new energy automobile, four placing openings are formed in the right position of the upper end of the lifting frame, and the four placing openings are respectively communicated with the upper ends of the corresponding movable sliding grooves.
In the mechanical equipment convenient for new energy automobile maintenance, the automobile body lifting piece includes the slide bar that the cross-section is the rectangle, both ends all slide around the slide bar have cup jointed a car pushing rod, two the one end that the slide bar was kept away from to the car pushing rod all rotates and is connected with the commentaries on classics piece, two the equal coaxial fixedly connected with screw thread piece of one end that the car pushing rod was kept away from to the commentaries on classics piece, screw thread piece threaded connection is in the screw thread inslot that corresponds.
In the mechanical equipment convenient for new energy automobile maintenance, machine grooves and part grooves are formed in the front inner wall and the rear inner wall of the maintenance pit, an electric screw gun is placed in the machine grooves, a winding roller is connected between the upper inner wall and the lower inner wall of the machine grooves in a common rotating mode, and a power line of the electric screw gun is wound on the winding roller.
In the mechanical equipment convenient for new energy automobile maintenance, a plurality of handles which are transversely and uniformly distributed are fixedly connected on the front inner wall and the rear inner wall of the maintenance pit and below the end block.
Compared with the prior art, the mechanical equipment convenient for the maintenance of the new energy automobile has the advantages that:
Through setting up the lifting frame of liftable in the maintenance pit to set up mobilizable service creeper in the lifting frame, make maintainer can carry out the maintenance work of new energy automobile bottom with two kinds of maintenance modes of standing position or lying position in the pit, make maintainer can be comfortable maintain and change such as power supply part in the maintenance pit, alleviate the damage to neck and waist.
Through setting up automobile body lifting piece and wheel supporting groove, after installing automobile body lifting piece, utilize the synchronous rising of four pneumatic cylinders, but the bottom plate of contact top, after playing the supporting role, four fork lifters shrink, alright make four wheels unsettled to leave more wheel supporting groove's space, maintenance personal alright carry out the maintenance work of new energy automobile wheel's change or shock mitigation system this moment.
Drawings
FIG. 1 is a front perspective view of a mechanical device for facilitating new energy automobile maintenance according to the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;
Fig. 3 is a schematic structural diagram of a lifting frame in a mechanical device for facilitating maintenance of a new energy automobile in a overlooking manner;
Fig. 4 is a perspective view of a structure of a body lifting member in a mechanical device for facilitating maintenance of a new energy automobile according to the present invention.
In the figure: the device comprises a maintenance pit, a wheel supporting groove (2), a supporting plate (3), a fork-shaped lifter (4), a stair (5), a lifting groove (6), a fixing plate (7), an 8 threaded rod, a motor (9), a lifting frame (10), a lifting block (11), a moving chute (12), a lying plate (13), a pulley (14), a placing port (15), a top block (16), a terminal block (17), a hydraulic cylinder (18), a threaded groove (19), a top bar (20), a sliding rod (21), a rotating block (22), a threaded block (23), a machine groove (24), a part groove (25), an electric screw gun (26) and a winding roller (27).
Detailed Description
The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.
Examples
Referring to fig. 1-4, a mechanical device for facilitating the maintenance of a new energy automobile comprises a maintenance pit 1, wherein the maintenance pit 1 adopts concrete casting. The right side wall of the maintenance pit 1 is provided with a stair 5 for a maintenance person to go into the maintenance pit 1. Two wheel supporting grooves 2 are formed in the upper end positions of the front inner wall and the rear inner wall of the maintenance pit 1, the four wheel supporting grooves 2 are rectangular, and the positions of the four wheel supporting grooves correspond to the positions of four wheels of a new energy automobile. The fork lifter 4 is installed in each wheel supporting groove 2, the supporting plate 3 is installed at the upper end of the fork lifter 4, the supporting plate 3 is matched with the shape of the wheel supporting groove 2 and is rectangular, the fork lifter 4 is of the prior art, the lifting of the supporting plate 3 in the wheel supporting groove 2 can be controlled, when the supporting plate 3 is flush with the notch of the wheel supporting groove 2, the new energy automobile can drive four wheels to the four supporting plates 3, and accordingly the four fork lifters 4 play a role in supporting the new energy automobile, and maintenance personnel can carry out maintenance work on the bottom of the automobile in the maintenance pit 1.
The lifting grooves 6 which are arranged at intervals are vertically formed in the front inner wall and the rear inner wall of the maintenance pit 1, the fixing plates 7 are fixedly connected to the positions, close to the inner top wall, of the lifting grooves 6, the threaded rods 8 are connected between the fixing plates 7 and the inner bottom wall of the lifting grooves 6 in a rotating mode, motors 9 which correspond to the threaded rods 8 in a driving mode are fixedly arranged at the upper ends of the fixing plates 7, lifting blocks 11 are slidably connected in the four lifting grooves 6, the lifting blocks 11 are sleeved on the threaded rods 8 and are in threaded connection with the threaded rods 8, lifting frames 10 are fixedly connected between the four lifting blocks 11 in a mode that the four motors 9 drive the four threaded rods 8 to synchronously work, and the lifting frames 10 can be driven to lift in the maintenance pit 1. The lifting frame 10 is transversely provided with movable sliding grooves 12 on the front and rear inner walls, a lying plate 13 is arranged between the two movable sliding grooves 12, two pulleys 14 are rotatably connected to the front and rear ends of the lying plate 13, the four pulleys 14 are respectively and slidably connected to the corresponding movable sliding grooves 12, the lying plate 13 can transversely move in the lifting frame 10 through the pulleys 14, then maintenance personnel can lie on the lying plate 13, the motor 9 is controlled to drive the lying plate to rise to the bottom of a vehicle, and accordingly maintenance work of the lying vehicle can be carried out. Four inlets 15 are formed in the right position of the upper end of the lifting frame 10, the four inlets 15 are respectively communicated with the upper ends of the corresponding movable sliding grooves 12, when the lying plate 13 moves to the rightmost side of the lifting frame 10, the four inlets 15 correspond to the four pulleys 14, so that the lying plate 13 can be detached from the lifting frame 10, and can be assembled when in use, thereby being convenient for maintenance workers to carry out two maintenance modes of standing and lying, and maintenance workers can comfortably carry out maintenance, replacement of power supply components and the like in the maintenance pit 1.
Two end blocks 17 are fixedly connected to the front inner wall and the rear inner wall of the maintenance pit 1, hydraulic cylinders 18 are fixedly mounted at the upper ends of the four end blocks 17, jacking blocks 16 are fixedly connected to telescopic ends of the hydraulic cylinders 18, jacking blocks 16 are embedded in the maintenance pit 1, threaded grooves 19 are formed in one ends of the inner wall of the maintenance pit 1, car body lifting pieces are arranged between every two jacking blocks 16 which correspond front and rear, each car body lifting piece comprises a sliding rod 21 with a rectangular cross section, a jacking rod 20 is sleeved at the front end and the rear end of the sliding rod 21 in a sliding mode, rotating blocks 22 are rotatably connected to one ends of the two jacking rods 20, which are far away from the sliding rod 21, of the two rotating blocks 22, threaded blocks 23 are coaxially fixedly connected to one ends of the two rotating blocks 22, and the threaded blocks 23 are in the corresponding threaded grooves 19 in a threaded mode. Through setting up thread groove 19 and screw thread piece 23, make automobile body lifting spare detachable, after installing automobile body lifting spare, utilize the synchronization of four pneumatic cylinders 18 to rise, but the bottom plate of car of contact top, after playing the supporting role, four fork-shaped lifters 4 shrink, alright make four wheels unsettled to leave more wheel supporting groove 2's space, maintenance personnel alright carry out the maintenance work of new energy automobile wheel change or shock mitigation system this moment.
The machine groove 24 and the part groove 25 are formed in the front inner wall and the rear inner wall of the maintenance pit 1, the electric screw gun 26 is placed in the machine groove 24, the winding roller 27 is connected between the upper inner wall and the lower inner wall of the machine groove 24 in a rotating mode, the power wire of the electric screw gun 26 is wound on the winding roller 27, and accordingly maintenance staff can use corresponding maintenance tools in the maintenance pit 1 conveniently. The maintenance pit 1 is provided with a plurality of handles which are transversely and evenly distributed on the front and rear inner walls and below the end block 17, and when maintenance personnel adopt a lying position to maintain on the lying plate 13, the lying plate 13 can move left and right through the handles on the front and rear sides of the maintenance pit 1, so that maintenance work is more convenient.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. The utility model provides a mechanical equipment convenient to new energy auto repair, includes maintenance pit (1), its characterized in that, inner wall upper end position has all been seted up around maintenance pit (1) two wheel supporting slots (2), four wheel supporting slots (2) are the rectangle setting, each fork lifter (4) are all installed in wheel supporting slots (2), backup pad (3) are installed to fork lifter (4) upper end, backup pad (3) and wheel supporting slots (2) shape matching just all are the rectangle, all vertically on inner wall around maintenance pit (1) set up lifting groove (6) of interval setting about two, be close to in lifting groove (6) and be close to in the position fixedly connected with fixed plate (7) of roof, jointly rotate between fixed plate (7) and lifting groove (6) inner wall and be connected with threaded rod (8), fixed plate (7) upper end fixed mounting has drive corresponding (8) pivoted motor (9), four in lifting groove (6) sliding connection have lifting block (11), lifting block (11) are all connected with in the sliding connection in the lifting groove (6) and are equipped with lifting block (11) and are connected with lifting frame (10) in the front of four, lifting frame (10) are connected with lifting frame (10), a lying plate (13) is arranged between the two movable sliding grooves (12), two pulleys (14) are rotatably connected to the front end and the rear end of the lying plate (13), and the four pulleys (14) are respectively and slidably connected in the corresponding movable sliding grooves (12);
Two end blocks (17) are fixedly connected to the front inner wall and the rear inner wall of the maintenance pit (1), hydraulic cylinders (18) are fixedly installed at the upper ends of the four end blocks (17), top blocks (16) are fixedly connected to the telescopic ends of the hydraulic cylinders (18), the top blocks (16) are embedded in the maintenance pit (1), threaded grooves (19) are formed in one ends, far away from the inner wall of the maintenance pit (1), of each of the two front and rear corresponding top blocks (16), and vehicle body lifting pieces are arranged between each two front and rear corresponding top blocks (16);
Four placing ports (15) are formed in the right position of the upper end of the lifting frame (10), the four placing ports (15) are respectively communicated with the upper ends of corresponding movable sliding grooves (12), machine grooves (24) and part grooves (25) are formed in the front inner wall and the rear inner wall of the maintenance pit (1), an electric screw gun (26) is placed in the machine grooves (24), a winding roller (27) is connected between the upper inner wall and the lower inner wall of the machine grooves (24) in a common rotation mode, and a power wire of the electric screw gun (26) is wound on the winding roller (27).
2. The mechanical equipment for facilitating the maintenance of the new energy automobile according to claim 1, wherein a stair (5) is arranged at the right side wall of the maintenance pit (1).
3. The mechanical equipment convenient for new energy automobile maintenance according to claim 1, wherein the automobile body lifting piece comprises a sliding rod (21) with a rectangular cross section, a top automobile rod (20) is sleeved at the front end and the rear end of the sliding rod (21) in a sliding mode, one ends, far away from the sliding rod (21), of the two top automobile rods (20) are respectively and rotatably connected with a rotating block (22), one ends, far away from the top automobile rods (20), of the two rotating blocks (22) are respectively and coaxially fixedly connected with a threaded block (23), and the threaded blocks (23) are in threaded connection with corresponding threaded grooves (19).
4. The mechanical equipment for facilitating the maintenance of the new energy automobile according to claim 1, wherein a plurality of handles which are transversely and uniformly distributed are fixedly connected on the front and rear inner walls of the maintenance pit (1) and below the end block (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310557157.3A CN116551643B (en) | 2023-05-17 | 2023-05-17 | Mechanical equipment convenient to new energy automobile maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310557157.3A CN116551643B (en) | 2023-05-17 | 2023-05-17 | Mechanical equipment convenient to new energy automobile maintenance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116551643A CN116551643A (en) | 2023-08-08 |
| CN116551643B true CN116551643B (en) | 2024-05-10 |
Family
ID=87487703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310557157.3A Active CN116551643B (en) | 2023-05-17 | 2023-05-17 | Mechanical equipment convenient to new energy automobile maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116551643B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4352322A (en) * | 1981-04-17 | 1982-10-05 | Brauer Roger L | Prefabricated vehicle maintenance apparatus |
| CN1596202A (en) * | 2001-11-29 | 2005-03-16 | 本田技研工业株式会社 | Automobile servicing process, and automobile servicing equipment |
| CN102718172A (en) * | 2012-06-13 | 2012-10-10 | 青岛四方车辆研究所有限公司 | Compatible train lifting unit of pit-type train lifter |
| CN208323349U (en) * | 2018-05-24 | 2019-01-04 | 缙云县阪喜达包装有限公司 | A kind of auto repair work lying board |
| CN210176385U (en) * | 2019-06-19 | 2020-03-24 | 中汽研（天津）汽车工程研究院有限公司 | Multipurpose lifting platform |
| CN110919618A (en) * | 2019-12-05 | 2020-03-27 | 盐城市恒美汽车服务有限公司 | Automobile maintenance device |
| US10661431B1 (en) * | 2019-03-08 | 2020-05-26 | Aaron James Hightower | Adjustable mechanic creeper |
| CN213837914U (en) * | 2020-11-30 | 2021-07-30 | 秦华荣 | Automobile overhaul pit of adjustable width and degree of depth |
| CN214399660U (en) * | 2020-10-27 | 2021-10-15 | 曹妃甸职业技术学院 | Automobile tilting device for auto repair |
-
2023
- 2023-05-17 CN CN202310557157.3A patent/CN116551643B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4352322A (en) * | 1981-04-17 | 1982-10-05 | Brauer Roger L | Prefabricated vehicle maintenance apparatus |
| CN1596202A (en) * | 2001-11-29 | 2005-03-16 | 本田技研工业株式会社 | Automobile servicing process, and automobile servicing equipment |
| CN102718172A (en) * | 2012-06-13 | 2012-10-10 | 青岛四方车辆研究所有限公司 | Compatible train lifting unit of pit-type train lifter |
| CN208323349U (en) * | 2018-05-24 | 2019-01-04 | 缙云县阪喜达包装有限公司 | A kind of auto repair work lying board |
| US10661431B1 (en) * | 2019-03-08 | 2020-05-26 | Aaron James Hightower | Adjustable mechanic creeper |
| CN210176385U (en) * | 2019-06-19 | 2020-03-24 | 中汽研（天津）汽车工程研究院有限公司 | Multipurpose lifting platform |
| CN110919618A (en) * | 2019-12-05 | 2020-03-27 | 盐城市恒美汽车服务有限公司 | Automobile maintenance device |
| CN214399660U (en) * | 2020-10-27 | 2021-10-15 | 曹妃甸职业技术学院 | Automobile tilting device for auto repair |
| CN213837914U (en) * | 2020-11-30 | 2021-07-30 | 秦华荣 | Automobile overhaul pit of adjustable width and degree of depth |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116551643A (en) | 2023-08-08 |
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