CN111517241B - Column-shaped eccentric column driving special jack for rehabilitation machine - Google Patents
Column-shaped eccentric column driving special jack for rehabilitation machine Download PDFInfo
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- CN111517241B CN111517241B CN202010473537.5A CN202010473537A CN111517241B CN 111517241 B CN111517241 B CN 111517241B CN 202010473537 A CN202010473537 A CN 202010473537A CN 111517241 B CN111517241 B CN 111517241B
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- 238000003825 pressing Methods 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 241000719178 Carangoides ruber Species 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000276694 Carangidae Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
-
- 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
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/008—Appliances for aiding patients or disabled persons to walk about using suspension devices for supporting the body in an upright walking or standing position, e.g. harnesses
-
- 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
- B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/26—Adaptations or arrangements of pistons
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Actuator (AREA)
Abstract
The invention discloses a columnar eccentric column driving special jack for a rehabilitation machine, which comprises a jack jacket, wherein a valve body is arranged at the lower end of the inside of the jack jacket, a cylinder groove is formed in the upper end of the valve body, an oil cylinder is arranged in the cylinder groove, the outer wall of the lower end of the oil cylinder is fixedly connected with the inner wall of the cylinder groove, an oil way is formed in the upper end of the valve body, a vertical-direction oil pressing groove is formed in the middle of the inner part of the lower end of the valve body, a pressure oil component is arranged in the oil pressing groove, the pressure oil component comprises a pressure oil part and a moving part, the pressure oil part is fixedly connected with the upper end of the moving part, a driving groove is formed in one side of the lower end of the moving part, a cylindrical groove is formed in the side wall of the valve body, a semicircular moving groove which penetrates through the oil pressing groove in the vertical direction is formed in the position of the inner wall of the cylindrical groove far from the center, and the driving component is rotatably connected in the cylindrical groove.
Description
Technical Field
The invention relates to the technical field of jack manufacturing, in particular to a columnar eccentric column driving special jack for a rehabilitation machine.
Background
The jack is a light and small lifting device which uses a rigid jacking piece as a working device and jacks up a heavy object in a small stroke of a top bracket or a bottom supporting claw. The jack is mainly used for departments such as factories and mines, transportation and the like to repair vehicles and work such as other lifting and supporting. The structure is light, firm, flexible and reliable, and can be carried and operated by one person.
The auxiliary walking hanging frame for rehabilitation is an instrument capable of properly hanging a patient and assisting the patient to walk healthily. In the prior art, an electric lifting rod is generally installed on the rehabilitation lifting frame to properly lift a patient, but in actual operation, the electric lifting rod has certain limitation. On the one hand, the family members of a plurality of patients in the hospital can not use the remote controller to adjust the lifting rod, so that the problem of inconvenient use exists. On the other hand, the electric lifting rod can have the condition of electricity consumption when in use, and can not be used continuously if the electric lifting rod can not be charged in time, so that the use experience of a patient can be influenced.
Disclosure of Invention
The invention aims to provide a columnar eccentric column driving special jack for a rehabilitation machine, which can replace an electric lifting rod to realize the lifting function of a lifting rod on a lifting frame, has the characteristic of convenient use, and can be directly and manually adjusted by family members of patients; in addition, the situation that the electric quantity is not used after being used does not exist, so that the electric quantity can be used in more occasions, and the application range of the rehabilitation machine is enlarged.
The technical aim of the invention is realized by the following technical scheme: the utility model provides a special jack of column eccentric column drive for rehabilitation machine, includes the jack overcoat, the inside lower extreme of jack overcoat is provided with the valve body, the jar groove has been seted up to the upper end of valve body, be provided with the hydro-cylinder in the jar inslot just the outer wall of hydro-cylinder lower extreme and the inner wall fixed connection in jar groove, the upper end of hydro-cylinder is provided with the piston rod, the outer wall of hydro-cylinder with be provided with the oil storage district between the jack overcoat, the oil circuit has been seted up to the inside oil circuit of upper end of valve body, vertical direction's pressure oil groove has been seted up in the middle of the lower extreme inside of valve body, be provided with the pressure oil subassembly in the pressure oil groove, the pressure oil subassembly includes pressure oil portion and mobile part, pressure oil portion fixed connection is in the upper end of mobile part, the drive groove has been seted up to lower extreme one side of mobile part, the cylinder groove has been seted up to the lateral wall of valve body, the position that the inner wall in cylinder groove kept away from the center has been seted up vertical direction and has been the semicircle annular removal groove to the shape of pressure oil groove, rotatory coupling has drive assembly in the cylinder groove.
Through the technical scheme, the driving column can be moved in the moving groove when the control rotating body can rotate in the range of the moving included angle, and the displacement of the driving column in the vertical direction is the distance between the upper end and the lower end of the moving groove. One end of the driving column far away from the rotating body moves in the driving groove and drives the pressure oil component to move up and down in the pressure oil groove. When the pressure oil part of the pressure oil assembly moves upwards, the oil in the vacuum area is pressed into the cylinder groove, so that the piston rod moves upwards; when the oil pressing part moves downwards, the oil in the oil storage area is sucked into the vacuum area, so that the fact that the oil in the vacuum area can be pressed into the cylinder groove all the time is guaranteed, and the piston rod can be lifted to a proper height all the time is achieved.
The invention is further arranged to: the driving assembly comprises a rotating body and a driving column, the rotating body is cylindrical, one end, close to the valve body, of the rotating body is rotationally connected in the cylindrical groove, the driving column is eccentrically fixed on the side, close to the oil pressing groove, of the rotating body, and one end, far away from the rotating body, of the driving column penetrates through the moving groove and is embedded in the driving groove.
Through above-mentioned technical scheme, the drive post eccentric setting to have great displacement in vertical direction, the rotor is at the back and forth movement of drive post in the drive groove when rotating, thereby drive the pressure oil subassembly and reciprocate in certain limit.
The invention is further arranged to: the utility model discloses a fixed slot for fixing is provided with the fixed caulking groove, the fixed through-hole that link up to the removal groove is offered to the central point in fixed caulking groove for fixing is put to the central point in cylindrical groove, the central point rotary connection that the rotor is close to the valve body side has the fixed column, the fixed column inlays and locates in the fixed caulking groove for fixing, the outer wall of fixed column is provided with the fixed pin, the fixed pin is kept away from the one end of fixed column and inlays and locate in the fixed through-hole for fixing.
Through the technical scheme, the fixing pin is inserted into the fixing through hole, so that the rotator can be prevented from outwards sliding out of the cylindrical groove in the rotating process.
The invention is further arranged to: the outer wall of the fixed column is provided with a groove, one end of the fixed pin, which is close to the fixed column, is slidably connected in the groove, and an elastic piece is arranged between the groove and the fixed pin.
Through the technical scheme, the elastic piece enables the fixing pin to have a certain displacement, and when the rotating body needs to be taken out of the cylindrical groove, the elastic piece can be compressed when the fixing pin is pressed, so that the part of the fixing pin, which is positioned in the through hole for fixing, is moved out of the through hole for fixing, and the rotating body can be taken out of the cylindrical groove.
The invention is further arranged to: and one end of the rotator, which is far away from the valve body, is provided with a compression bar jack.
Through the technical scheme, a worker can insert the compression bar into the compression bar jack when using, and the rotator can be rotated conveniently.
The invention is further arranged to: the rotor overcoat is equipped with fixed lantern ring, fixed lantern ring is located the valve body with between the depression bar jack, fixed lantern ring fixed connection is in the outer wall of valve body, the inner wall of fixed lantern ring with the outer wall of rotor rotates to be connected.
Through above-mentioned technical scheme, fixed lantern ring can play the guard action to the rotor, prevents simultaneously that impurity from entering into in the valve body from the marginal gap in cylindrical groove.
The invention is further arranged to: the two ends of the movable groove are semicircular, and the included angle between the connecting line of the semicircular circle centers of the two ends of the movable groove and the circle center of the inner wall of the cylindrical groove is 90-120 degrees.
Through above-mentioned technical scheme, control rotor round trip pivoted scope to control the distance that the subassembly reciprocated of pressing oil, make the subassembly of pressing oil can be better accomplish alternately with the cylinder groove of pressing in of vacuum district and inhale the vacuum district with the oil of oil storage district.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken along the direction A of FIG. 2 in accordance with the present invention;
FIG. 4 is a cross-sectional view taken along the direction B in FIG. 2 in accordance with the present invention;
FIG. 5 is a schematic view of the structure of the cylindrical groove of the present invention;
FIG. 6 is a schematic diagram of a driving assembly according to the present invention;
FIG. 7 is a top view of the drive assembly of the present invention;
fig. 8 is a cross-sectional view of the invention in the direction C of fig. 7.
The meaning of the reference numerals in the figures: 1. a jack coat; 2. a valve body; 3. a cylinder groove; 4. an oil cylinder; 5. a piston rod; 6. an oil storage area; 7. an oil path; 8. oil pressing grooves; 9. a pressurized oil assembly; 10. a pressure oil part; 11. a moving part; 12. a driving groove; 13. a cylindrical groove; 14. a moving groove; 15. a drive assembly; 16. a rotating body; 17. a drive column; 18. a fixing caulking groove; 19. a fixing through hole; 20. fixing the column; 21. a fixing pin; 22. a groove; 23. an elastic member; 24. a compression bar jack; 25. a fixed collar; 26. a vacuum zone; 27. an oil channel I; 28. an oil channel II; 29. a one-way valve; 30. an oil return passage; 31. and an oil return valve.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
The present invention is described below with reference to fig. 1 to 8.
The utility model provides a special jack of column eccentric column drive for rehabilitation machine, includes jack overcoat 1, and the appearance of jack overcoat 1 is cylindrical, and the lower extreme fixed connection installation pole of jack overcoat 1, installation pole pass through screw and rehabilitation machine body fixed connection. The lower extreme inside jack overcoat 1 is provided with valve body 2, and jar groove 3 has been seted up to the upper end of valve body 2, is provided with hydro-cylinder 4 in jar groove 3 and the outer wall of hydro-cylinder 4 lower extreme and the inner wall fixed connection in jar groove 3, and the upper end of hydro-cylinder 4 is provided with piston rod 5, and the fixed connection in position that is close to the rehabilitation machine body of the upper end of piston rod 5 and the jib loading boom lower extreme of rehabilitation machine upper end. The lower extreme and the recovered machine body of jib loading boom pass through hinge interconnect to piston rod 5 rises and can make the jib loading boom keep away from the one end of recovered machine body and upwards rotate taking the articulated position as the center, thereby lifts by crane the work.
An oil storage area 6 is arranged between the outer wall of the oil cylinder 4 and the jack jacket 1, an oil way 7 is arranged in the upper end of the valve body 2, and an oil pressing groove 8 in the vertical direction is arranged in the middle of the lower end of the valve body 2. The oil path 7 comprises a first oil passage 27 communicated with the vacuum area 26 at the upper end of the oil groove 8, the cylinder groove 3 and the vacuum area 26, and a second oil passage 28 communicated with the oil storage area 6 and the vacuum area 26, wherein a one-way valve 29 is arranged at the position, close to the vacuum area 26, of the first oil passage 27 and the second oil passage 28, and oil can only enter the vacuum area 26 from the oil storage area 6 and then enter the cylinder groove 3 from the vacuum area 26. The oil path 7 further comprises an oil return channel 30 communicated with the cylinder groove 3 and the oil storage area 6, and an oil return valve 31 is arranged on the oil return channel 30.
The oil pressing groove 8 is internally provided with an oil pressing assembly 9, the oil pressing assembly 9 comprises an oil pressing part 10 and a moving part 11, the oil pressing part 10 is fixedly connected to the upper end of the moving part 11, and the outer wall of the oil pressing part 10 is sealed with the inner wall of the oil pressing groove 8. A driving groove 12 horizontally provided is provided at a lower end side of the moving part 11. The side wall of the valve body 2, which is close to the driving groove 12, is provided with a cylindrical groove 13, and the position, away from the center, of the inner wall of the cylindrical groove 13 is provided with a moving groove 14 which is vertically arranged and penetrates through the pressing oil groove 8 and is semi-circular in shape. The central line of the movable groove 14 is a horizontal line, the two ends of the movable groove 14 are semicircular, the included angle between the connecting lines of the semicircular circle centers of the two ends of the movable groove 14 and the circle centers of the inner wall of the cylindrical groove 13 is a movable included angle, and the size of the movable included angle is 90-120 degrees.
The cylinder groove 13 is rotatably connected with a driving component 15, the driving component 15 comprises a rotating body 16 and a driving column 17, the rotating body 16 is cylindrical, one end, close to the valve body 2, of the rotating body 16 is rotatably connected in the cylinder groove 13, the driving column 17 is eccentrically fixed on the side, close to the oil pressing groove 8, of the rotating body 16, and one end, far away from the rotating body 16, of the driving column 17 penetrates through the moving groove 14 and is embedded in the driving groove 12. When the control rotating body 16 can rotate within the range of the movement included angle, the driving column 17 can move in the movement groove 14, and the displacement amount of the driving column 17 in the vertical direction is the distance between the upper end and the lower end of the movement groove 14. The end of the driving post 17 away from the rotor 16 moves in the driving groove 12 and drives the pressing oil assembly 9 to move up and down in the pressing oil groove 8. When the pressure oil part 10 of the pressure oil assembly 9 moves upwards, the oil pressure of the vacuum area 26 is driven into the cylinder groove 3, so that the piston rod 5 moves upwards; when the pressure oil portion 10 moves downwards, the oil in the oil reservoir 6 will be sucked into the vacuum region 26, thereby ensuring that oil can be pressed into the cylinder groove 3 all the time in the vacuum region 26.
The central point of the cylinder groove 13 is provided with a fixing caulking groove 18, the inner wall of the fixing caulking groove 18 is provided with a fixing through hole 19 penetrating through to the moving groove 14, the central point of the rotating body 16 close to the side surface of the valve body 2 is rotationally connected with a fixing column 20, the fixing column 20 is embedded in the fixing caulking groove 18, the outer wall of the fixing column 20 is provided with a fixing pin 21, and one end of the fixing pin 21 far away from the fixing column 20 is embedded in the fixing through hole 19. The fixing pin 21 is inserted into the fixing through hole 19 so that the rotator 16 can be prevented from sliding out of the cylindrical groove 13 during rotation. The outer wall of the fixed column 20 is provided with a groove 22, one end of the fixed pin 21, which is close to the fixed column 20, is connected in the groove 22 in a sliding way, and an elastic piece 23 is arranged between the groove 22 and the fixed pin 21. The elastic member 23 allows the fixing pin 21 to have a certain displacement, and when the rotor 16 needs to be taken out of the cylindrical groove 13, the elastic member 23 is compressed when the fixing pin 21 is pressed, so that the portion of the fixing pin 21 located in the fixing through hole 19 is removed from the fixing through hole 19, and the rotor 16 can be taken out of the cylindrical groove 13.
The end of the rotator 16 far away from the valve body 2 is provided with a pressing rod jack 24, and a worker can insert a pressing rod into the pressing rod jack 24 when using the rotator, so that the rotator 16 can be rotated conveniently. The rotor 16 is sleeved with a fixed collar 25, the fixed collar 25 is positioned between the valve body 2 and the compression bar jack 24, the fixed collar 25 is fixedly connected to the outer wall of the valve body 2, and the inner wall of the fixed collar 25 is rotationally connected with the outer wall of the rotor 16. The fixed collar 25 can protect the rotor 16 and prevent foreign matter from entering the valve body 2 from the edge slit of the cylindrical groove 13.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (2)
1. The utility model provides a column eccentric column drive jack for rehabilitation machine, includes jack overcoat (1), the inside lower extreme of jack overcoat (1) is provided with valve body (2), jar groove (3) have been seted up to the upper end of valve body (2), be provided with hydro-cylinder (4) just in jar groove (3) the outer wall of hydro-cylinder (4) lower extreme and the inner wall fixed connection in jar groove (3), the upper end of hydro-cylinder (4) is provided with piston rod (5), its characterized in that: an oil storage area (6) is arranged between the outer wall of the oil cylinder (4) and the jack jacket (1), an oil way (7) is formed in the upper end of the valve body (2), an oil pressing groove (8) in the vertical direction is formed in the middle of the lower end of the valve body (2), an oil pressing assembly (9) is arranged in the oil pressing groove (8), the oil pressing assembly (9) comprises an oil pressing part (10) and a moving part (11), the oil pressing part (10) is fixedly connected to the upper end of the moving part (11), a driving groove (12) is formed in one side of the lower end of the moving part (11), a cylindrical groove (13) is formed in the side wall of the valve body (2), a moving groove (14) in the shape of a semicircle shape is formed in the position, which is far away from the center, of the inner wall of the cylindrical groove (13) and penetrates through the oil pressing groove (8) in the vertical direction, a driving assembly (15) is connected in the rotation mode, the driving assembly (15) comprises a rotating body (16) and a driving column (17), the rotating body (16) and the rotating body (16) is the rotating body, the rotating body (16) is fixedly connected to the side face of the rotating body (16) near the eccentric groove (16), the utility model discloses a rotary compression device, including fixed stem (25) and fixed compression bar (25), fixed stem (24) are located between valve body (2) and fixed sleeve (24), fixed stem (24) are located between valve body (2) and fixed sleeve (25), fixed sleeve (24) are located between valve body (2) and fixed sleeve (25) are located between valve body (16) and fixed sleeve (25), the fixed lantern ring (25) is fixedly connected to the outer wall of the valve body (2), and the inner wall of the fixed lantern ring (25) is rotatably connected with the outer wall of the rotating body (16).
2. The column-shaped eccentric column driving jack for a rehabilitation machine according to claim 1, wherein: the two ends of the movable groove (14) are semicircular, and an included angle between the connecting line of the semicircular circle centers of the two ends of the movable groove (14) and the circle center of the inner wall of the cylindrical groove (13) is 90-120 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010473537.5A CN111517241B (en) | 2020-05-29 | 2020-05-29 | Column-shaped eccentric column driving special jack for rehabilitation machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010473537.5A CN111517241B (en) | 2020-05-29 | 2020-05-29 | Column-shaped eccentric column driving special jack for rehabilitation machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111517241A CN111517241A (en) | 2020-08-11 |
| CN111517241B true CN111517241B (en) | 2023-08-11 |
Family
ID=71910967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010473537.5A Active CN111517241B (en) | 2020-05-29 | 2020-05-29 | Column-shaped eccentric column driving special jack for rehabilitation machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111517241B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2105409A (en) * | 1981-09-07 | 1983-03-23 | Yun Long Yu | Electric oil jack |
| CN101318615A (en) * | 2008-07-04 | 2008-12-10 | 彭长胜 | Integral double-acting hand jack |
| CN102107832A (en) * | 2009-12-23 | 2011-06-29 | 陈有源 | Hydraulic jack with controllable heavy load descending speed |
| CN206521233U (en) * | 2016-12-28 | 2017-09-26 | 南昌航空大学 | A kind of electric integrated jack of car-mounted manual |
| CN110500271A (en) * | 2018-05-16 | 2019-11-26 | 北京中冶华润科技发展有限公司 | Pressure oil mechanism and oil pumping device |
| CN209872220U (en) * | 2019-03-19 | 2019-12-31 | 长安大学 | Pedal variable jack |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201169513Y (en) * | 2007-11-16 | 2008-12-24 | 常熟通润汽车零部件有限公司 | Pedal hydraulic double-speed and pneumatic idle load fast hoisting jack |
-
2020
- 2020-05-29 CN CN202010473537.5A patent/CN111517241B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2105409A (en) * | 1981-09-07 | 1983-03-23 | Yun Long Yu | Electric oil jack |
| CN101318615A (en) * | 2008-07-04 | 2008-12-10 | 彭长胜 | Integral double-acting hand jack |
| CN102107832A (en) * | 2009-12-23 | 2011-06-29 | 陈有源 | Hydraulic jack with controllable heavy load descending speed |
| CN206521233U (en) * | 2016-12-28 | 2017-09-26 | 南昌航空大学 | A kind of electric integrated jack of car-mounted manual |
| CN110500271A (en) * | 2018-05-16 | 2019-11-26 | 北京中冶华润科技发展有限公司 | Pressure oil mechanism and oil pumping device |
| CN209872220U (en) * | 2019-03-19 | 2019-12-31 | 长安大学 | Pedal variable jack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111517241A (en) | 2020-08-11 |
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