CN111498726A - Manual pressing type jack for rehabilitation hanger columnar structure - Google Patents
Manual pressing type jack for rehabilitation hanger columnar structure Download PDFInfo
- Publication number
- CN111498726A CN111498726A CN202010474450.XA CN202010474450A CN111498726A CN 111498726 A CN111498726 A CN 111498726A CN 202010474450 A CN202010474450 A CN 202010474450A CN 111498726 A CN111498726 A CN 111498726A
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- oil
- groove
- oil return
- jack
- cylinder
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 238000007789 sealing Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 description 165
- 239000010720 hydraulic oil Substances 0.000 description 15
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Images
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
-
- 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
- B66F3/28—Adaptations or arrangements of pistons telescopic
-
- 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
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a manual pressing type jack for a columnar structure of a rehabilitation hanger, which comprises a jack outer sleeve, wherein a base in a cylindrical shape is arranged at the lower end inside the jack outer sleeve, a top cap is arranged at the upper end of the jack outer sleeve, a cylinder groove is formed in the upper surface of the base, a pressure oil groove, an oil inlet groove and an oil return groove are respectively formed in one side of the cylinder groove, an oil inlet channel penetrating to a steel groove is formed below the cylinder groove, the oil inlet channel is respectively communicated with the pressure oil groove and the oil inlet groove, an oil return channel for communicating the oil groove and the oil return groove is formed in one side of the oil inlet channel, a one-way valve I is arranged at the part of the oil inlet channel, which is close to the oil inlet groove, a one-way valve II is arranged at the position of the oil inlet groove, which is close to the upper end of the base, a piston rod is arranged in the oil inlet groove, and the upper end of the piston rod penetrates through the top cap.
Description
Technical Field
The invention relates to the technical field of jacks, in particular to a manual pressing type jack for a columnar structure of a rehabilitation hanging bracket.
Background
The jack is light and small lifting equipment which takes a rigid jacking piece as a working device and jacks a heavy object through a top bracket or a bottom supporting claw within a small stroke. The auxiliary walking hanging bracket for the rehabilitation is an instrument which can properly lift a patient and assist the patient to walk in the rehabilitation way.
An electric lifting rod is generally arranged on a rehabilitation hanging frame in the prior art to properly lift a patient, so that the patient is assisted to perform some rehabilitation training. However, the electric lift rod is often used up, and the current use environment cannot be charged in time, so that the electric lift rod cannot be used any more. In addition, a remote controller is needed for controlling the electric lifting, and the operation condition is not known for some elderly patients and family members thereof, so that the electric lifting control device has certain limitation.
Disclosure of Invention
The invention aims to provide a manual pressing type jack for a columnar structure of a rehabilitation hanging bracket, which can replace an electric lifting rod on the rehabilitation hanging bracket to lift a patient and has the advantages of convenience in operation and capability of being adjusted and used at any time and any place.
The technical purpose of the invention is realized by the following technical scheme: a manual pressing type jack for a columnar structure of a rehabilitation hanging bracket comprises a jack outer sleeve, wherein the jack outer sleeve is of a hollow cylindrical structure, a base which is cylindrical in shape is arranged at the lower end inside the jack outer sleeve, a top cap is arranged at the upper end of the jack outer sleeve, a cylinder groove is formed in the upper surface of the base, a pressure oil groove, an oil inlet groove and an oil return groove are respectively formed in one side of the cylinder groove, an oil inlet channel communicated with the steel groove is formed below the cylinder groove, the oil inlet channel is respectively communicated with the pressure oil groove and the oil inlet groove, an oil return channel communicated with the oil groove and the oil return groove is formed in one side of the oil inlet channel, a one-way valve I is arranged at the position, close to the upper end of the base, of the oil inlet channel is provided with a one-way valve II, a pump core is arranged in the pressure oil groove, and the upper end, the oil inlet groove is internally provided with a piston rod, the upper end of the piston rod penetrates through the top cap, the oil return groove is internally provided with an oil return assembly, and the upper end of the oil return assembly penetrates through the top cap.
Through the technical scheme, the pump core extrudes the hydraulic oil in the oil inlet channel when moving downwards, the hydraulic oil is pressed into the cylinder groove through the one-way valve I, and the hydraulic oil in the oil storage area is sucked into the oil inlet channel through the one-way valve II when the pump core moves upwards, so that the hydraulic oil in the oil inlet channel is supplemented. The height position of the oil return valve rod in the oil return groove can be adjusted by a worker through rotating the oil return valve knob, when the piston rod moves upwards, the oil return valve rod needs to be adjusted downwards, the oil return steel ball plugs the hole at the bottom of the oil return groove, and therefore oil in the oil cylinder cannot enter an oil storage area; when the piston rod needs to descend and return, the oil return valve rod needs to be adjusted upwards, so that the oil return steel ball cannot block a hole in the bottom of the oil return groove, the oil return channel is communicated with the oil outlet channel, and a worker only needs to press the piston rod downwards to enable hydraulic oil in the oil cylinder to flow into an oil storage area from the oil cylinder through the oil return channel and the oil outlet channel, so that the piston rod descends.
The invention is further configured to: the outer side wall of the top cap is provided with an annular ring groove, a top cap sealing ring is embedded in the annular ring groove, and the inner side and the outer side of the top cap sealing ring are respectively tightly attached to the annular ring groove and the inner wall of the jack jacket.
Through the technical scheme, the inner side and the outer side of the top cap sealing ring are respectively tightly attached to the annular ring groove and the inner wall of the jack jacket, so that a closed cavity is formed inside the jack jacket.
The invention is further configured to: the oil return assembly comprises an oil return valve rod, an oil return steel ball and an oil return valve threaded sleeve, the oil return steel ball is fixed at the bottom end of the oil return valve rod, an external thread is arranged on the outer wall of the upper end of the oil return valve rod, the oil return valve threaded sleeve is fixed at the upper end of the top cap, and the upper end of the oil return valve rod penetrates through the oil return valve threaded sleeve and is in threaded connection with the oil return valve threaded sleeve.
According to the technical scheme, when the piston rod is lifted, the oil return valve rod is rotated to move downwards so that the oil return steel ball is blocked between the oil return channel and the oil outlet channel, and oil in the oil cylinder cannot flow into an oil storage area; when the piston rod descends, the oil return valve rod is rotated to move upwards, so that the oil return steel ball cannot be blocked between the oil return channel and the oil outlet channel, and the oil in the oil cylinder flows into an oil storage area.
The invention is further configured to: and the top end of the oil return valve rod is fixedly connected with an oil return valve knob.
Through above-mentioned technical scheme, it can make things convenient for the staff to rotate the oil return valve rod manually to return the oil valve knob, adjusts it and reciprocates.
The invention is further configured to: and a manual oil pressing assembly is arranged at the upper end of the end cover.
Through above-mentioned technical scheme, manual pressure oil assembly enables the staff to control the pump core more conveniently and reciprocate.
The invention is further configured to: the manual oil pressing assembly comprises a pressing seat, a pressing connecting rod and a handle, the pressing seat is fixedly connected to the upper end of the top cap, two ends of the pressing connecting rod are hinged to the upper end of the pressing seat and the end portion of the handle respectively, and the top end of the pump core is hinged to the lower end of the handle close to the pressing seat.
Through above-mentioned technical scheme, the staff can reciprocate through the handle control pump core that moves down, makes the hydraulic oil of oil storage area flow into in the hydro-cylinder and makes the piston cylinder rise.
The invention is further configured to: the end part of the handle far away from the pressing connecting rod is provided with a rubber ball.
Through above-mentioned technical scheme, the rubber ball can make the staff more comfortable when holding, makes it can control the handle better.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a cross-sectional view taken along line G of FIG. 2 in accordance with the present invention;
FIG. 4 is a schematic view of the internal structure of the jack housing of the present invention;
FIG. 5 is a schematic view of the oil return assembly of the present invention;
FIG. 6 is a top view of the oil return assembly of the present invention;
FIG. 7 is a cross-sectional view taken along line H of FIG. 6 in accordance with the present invention;
FIG. 8 is a schematic structural view of a base according to the present invention;
FIG. 9 is a top view of the base of the present invention;
fig. 10 is a cross-sectional view taken along direction I of fig. 9 in accordance with the present invention.
The reference numbers in the figures mean: 1. a jack jacket; 2. a base; 3. a top cap; 4. a cylinder groove; 5. pressing an oil tank; 6. an oil inlet groove; 7. an oil return groove; 8. an oil inlet channel; 9. an oil return passage; 10. an oil outlet channel; 11. an oil storage region; 12. a one-way valve I; 13. a second one-way valve; 14. a pump core; 15. an oil cylinder; 16. a piston rod; 17. an oil return assembly; 18. an annular ring groove; 19. a top cap seal ring; 20. an oil return valve rod; 21. an oil return steel ball; 22. an oil return valve threaded sleeve; 23. an oil return valve knob; 24. a manual oil pressing assembly; 25. a snap seat; 26. a thumb lever connecting rod; 27. a handle; 28. a rubber ball; 29. the inner hexagonal flat end is used for fastening the screw.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The present invention is explained below with reference to fig. 1 to 10.
The utility model provides a manual push type jack for recovered gallows columnar structure, includes jack overcoat 1, jack overcoat 1 is cavity tubular structure, and jack overcoat 1's bottom is airtight to be provided with the overcoat connecting seat, and the lower extreme of overcoat connecting seat is provided with the rod end joint bearing who is connected with recovered gallows body. The upper end of the jack jacket 1 is provided with a top cap 3, a first fixing hole is formed in the position, opposite to the upper end side wall of the jack jacket 1, of the upper end side wall, a second fixing hole is formed in the outer side wall of the top cap 3, and inner hexagonal flat end set screws 29 are installed in the first fixing hole and the second fixing hole after the lower end of the top cap 3 is sleeved on the jack jacket 1 to fixedly connect the top cap 3 and the jack. An annular ring groove 18 is formed in the outer side wall of the top cap 3, the annular ring groove 18 is located below the second fixing hole, a top cap 3 sealing ring is embedded in the annular ring groove 18, and the inner side and the outer side of the top cap 3 sealing ring are respectively tightly attached to the annular ring groove 18 and the inner wall of the jack jacket 1, so that a closed cavity is formed inside the jack jacket 1.
The lower extreme of jack overcoat 1 inside is provided with the shape and is cylindrical base 2, and the lower extreme of base 2 and the bottom fixed connection of jack overcoat 1. The upper surface of the base 2 is provided with a cylinder groove 4, the cylinder groove 4 is positioned on one side of the upper surface of the base 2 deviated from the central position, an oil cylinder 15 is vertically arranged in the cylinder groove 4, the lower end of the oil cylinder 15 is communicated with the cylinder groove 4, the upper end part of the oil cylinder 15 is slidably connected with a piston rod 16, and the upper end of the piston rod 16 penetrates through the top cap 3. An oil storage area 11 is arranged between the jack outer sleeve 1 and the oil cylinder 15, and when a piston rod 16 of the jack descends, hydraulic oil in the oil cylinder 15 can flow back to the oil storage area 11.
One side of the cylinder groove 4 close to the center of the upper surface of the base 2 is respectively provided with a pressure oil groove 5, an oil inlet groove 6 and an oil return groove 7, and the pressure oil groove 5, the oil inlet groove 6 and the oil return groove 7 are arranged around the cylinder groove 4. An oil inlet channel 8 which is vertically arranged is formed below the cylinder groove 4, the upper end of the oil inlet channel 8 is communicated to the steel groove, and the lower end of the oil inlet channel 8 is respectively communicated with the oil pressing groove 5 and the oil inlet groove 6. An oil return channel 9 which is communicated with the oil groove and the oil return groove 7 is formed in one side of the oil inlet channel 8, and an oil outlet channel 10 communicated with the oil return groove 7 and the oil storage area 11 is formed in the lower end of the oil return groove 7. The part of the oil inlet channel 8, which is close to the oil inlet groove 6, is provided with a one-way valve I12, and hydraulic oil can only enter the cylinder groove 4 from the lower end of the oil inlet channel 8 through the one-way valve I12 but cannot enter the lower end of the oil inlet channel 8 from the cylinder groove 4. The position of the oil inlet groove 6, which is close to the upper end of the base 2, is provided with a second check valve 13, and hydraulic oil can only enter the oil inlet channel 8 from the oil storage area 11 through the second check valve 13. A pump core 14 is arranged in the pressure oil tank 5, and the upper end of the pump core 14 penetrates through the top cap 3. When the pump core 14 moves downwards, hydraulic oil in the oil inlet channel 8 is extruded, the hydraulic oil is pressed into the cylinder groove 4 through the first check valve 12, and when the pump core 14 moves upwards, the hydraulic oil in the oil storage area 11 is sucked into the oil inlet channel 8 through the second check valve 13, so that the hydraulic oil in the oil inlet channel 8 is supplemented.
An oil return assembly 17 is arranged in the oil return groove 7, and the upper end of the oil return assembly 17 penetrates through the top cap 3. The oil return assembly 17 comprises an oil return valve rod 20, an oil return steel ball 21 and an oil return valve threaded sleeve 22, the oil return steel ball 21 is fixed at the bottom end of the oil return valve rod 20, an external thread is arranged on the outer wall of the upper end of the oil return valve rod 20, the oil return valve threaded sleeve 22 is fixed at the upper end of the top cap 3, the upper end of the oil return valve rod 20 penetrates through the oil return valve threaded sleeve 22 and is in threaded connection with the oil return valve threaded sleeve 22, and an oil return valve knob 23 is fixedly connected to the. The worker can adjust the height position of the oil return valve rod 20 in the oil return groove 7 by rotating the oil return valve knob 23, and when the piston rod 16 moves upwards, the oil return valve rod 20 needs to be adjusted downwards, so that the hole at the bottom of the oil return groove 7 is blocked by the oil return steel ball 21, and the oil in the oil cylinder 15 cannot enter the oil storage area 11; when the piston rod 16 needs to descend and return, the oil return valve rod 20 needs to be adjusted upwards, so that the oil return steel ball 21 cannot block the hole in the bottom of the oil return groove 7, the oil return channel 9 is communicated with the oil outlet channel 10, and a worker can make hydraulic oil in the oil cylinder 15 flow into the oil storage area 11 from the oil cylinder 15 through the oil return channel 9 and the oil outlet channel 10 only by pressing the piston rod 16 downwards, so that the piston rod 16 descends.
The upper end of the end cover is provided with a manual oil pressing assembly 24, and the manual oil pressing assembly 24 comprises a press handle seat 25, a press handle connecting rod 26 and a handle 27. The pressing seat 25 is fixedly connected to the upper end of the top cap 3, and both ends of the pressing link 26 are respectively hinged to the upper end of the pressing seat 25 and the end of the handle 27. The top end of the pump core 14 is hinged with the lower end of the handle 27 close to the snap seat 25, and the end of the handle 27 far away from the snap connecting rod 26 is provided with a rubber ball 28. The operator can move the pump core 14 up and down by moving the handle 27 down, so that the hydraulic oil in the oil storage area 11 flows into the oil cylinder 15 to lift the piston cylinder. The rubber ball 28 makes it more comfortable for the worker to hold the handle 27 in his hand, so that he can better control it.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and those modifications and variations assumed in the above are also considered to be within the protective scope of the present invention.
Claims (7)
1. The utility model provides a manual push type jack for recovered gallows columnar structure, includes jack overcoat (1), its characterized in that: the jack outer sleeve (1) is of a hollow cylindrical structure, a base (2) which is cylindrical in shape is arranged at the lower end inside the jack outer sleeve (1), a top cap (3) is arranged at the upper end of the jack outer sleeve (1), a cylinder groove (4) is formed in the upper surface of the base (2), a pressure oil groove (5), an oil inlet groove (6) and an oil return groove (7) are respectively formed in one side of the cylinder groove (4), an oil inlet channel (8) penetrating through the cylinder groove (4) is formed below the cylinder groove (4), the oil inlet channel (8) is respectively communicated with the pressure oil groove (5) and the oil inlet groove (6), an oil return channel (9) communicating the cylinder groove (4) with the oil return groove (7) is formed in one side of the oil inlet channel (8), an oil outlet channel (10) communicated with the oil return groove (7) and an oil storage area (11) is formed in the lower end of the oil return groove (7), the oil feed passageway (8) are close to the position of oil feed tank (6) and are provided with check valve one (12), the position that oil feed tank (6) are close to base (2) upper end is provided with check valve two (13), be provided with pump core (14) in pressing oil tank (5), just run through the upper end of pump core (14) hood (3), vertically in jar groove (4) be provided with hydro-cylinder (15), the lower extreme and jar groove (4) of hydro-cylinder (15) communicate each other, the upper end internal sliding connection of hydro-cylinder (15) has piston rod (16), just the upper end of piston rod (16) is run through hood (3), be provided with oil return subassembly (17) in oil return groove (7), just the upper end of oil return subassembly (17) is run through hood (3).
2. The manual push type jack for the rehabilitation hanger column structure as claimed in claim 1, wherein: an annular ring groove (18) is formed in the outer side wall of the top cap (3), a top cap (3) sealing ring is embedded in the annular ring groove (18), and the inner side and the outer side of the top cap (3) sealing ring are tightly attached to the annular ring groove (18) and the inner wall of the jack outer sleeve (1) respectively.
3. The manual push type jack for the rehabilitation hanger column structure as claimed in claim 1, wherein: the oil return assembly (17) comprises an oil return valve rod (20), an oil return steel ball (21) and an oil return valve threaded sleeve (22), the oil return steel ball (21) is fixed at the bottom end of the oil return valve rod (20), the outer wall of the upper end of the oil return valve rod (20) is provided with external threads, the oil return valve threaded sleeve (22) is fixed at the upper end of the top cap (3), and the upper end of the oil return valve rod (20) penetrates through the oil return valve threaded sleeve (22) and the oil return valve threaded sleeve (22) in threaded connection.
4. The manual push type jack for the rehabilitation hanger column structure as claimed in claim 3, wherein: the top end of the oil return valve rod (20) is fixedly connected with an oil return valve knob (23).
5. The manual push type jack for the rehabilitation hanger column structure as claimed in claim 1, wherein: and the upper end of the end cover is provided with a manual oil pressing assembly (24).
6. The manual push type jack for the rehabilitation hanger column structure as claimed in claim 5, wherein: the manual oil pressing assembly (24) comprises a pressing seat (25), a pressing connecting rod (26) and a handle (27), the pressing seat (25) is fixedly connected to the upper end of the top cap (3), two ends of the pressing connecting rod (26) are hinged to the upper end of the pressing seat (25) and the end portion of the handle (27) respectively, and the top end of the pump core (14) is hinged to the lower end of the handle (27) close to the pressing seat (25).
7. The manual push type jack for the rehabilitation hanger column structure as claimed in claim 6, wherein: the end part of the handle (27) far away from the pressing connecting rod (26) is provided with a rubber ball (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474450.XA CN111498726A (en) | 2020-05-29 | 2020-05-29 | Manual pressing type jack for rehabilitation hanger columnar structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474450.XA CN111498726A (en) | 2020-05-29 | 2020-05-29 | Manual pressing type jack for rehabilitation hanger columnar structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111498726A true CN111498726A (en) | 2020-08-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010474450.XA Pending CN111498726A (en) | 2020-05-29 | 2020-05-29 | Manual pressing type jack for rehabilitation hanger columnar structure |
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| Country | Link |
|---|---|
| CN (1) | CN111498726A (en) |
Citations (12)
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|---|---|---|---|---|
| FR2783514A3 (en) * | 1998-09-23 | 2000-03-24 | Michael Hung | Rapid acting hydraulic unit, for use in jack, has three concentric cylindrical oil chambers, with innermost chamber containing drift, fixed to base to allow oil through to operate main stem |
| CN2543939Y (en) * | 2002-05-08 | 2003-04-09 | 江苏通润机电集团有限公司 | Pedal separation type double-speed jack |
| US20080048159A1 (en) * | 2006-07-10 | 2008-02-28 | Haoying Dai | Double-speed hydraulic bottle jack |
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| CN102285607A (en) * | 2011-07-15 | 2011-12-21 | 常熟通润汽车千斤顶有限公司 | Hoisting jack with low press hand |
| CN102601780A (en) * | 2010-10-22 | 2012-07-25 | Mvp(香港)工业有限公司 | Handle system for bottle jack |
| CN202625740U (en) * | 2012-05-04 | 2012-12-26 | 济南吉利汽车有限公司 | Convenient hydraulic lift truck |
| CN103072920A (en) * | 2013-01-05 | 2013-05-01 | 常熟通润汽车零部件股份有限公司 | Oil pressure elevation device for carrying and transporting vehicle parts |
| CN107777609A (en) * | 2017-09-29 | 2018-03-09 | 昆明理工大学 | A kind of adaptive variable-flow hydraulic jack |
| CN207861778U (en) * | 2017-06-30 | 2018-09-14 | 上海云树知识产权咨询有限公司 | A kind of multiple field hydraulic jacking device for composite plate |
| CN208610247U (en) * | 2017-09-11 | 2019-03-19 | 尤仁伟 | A kind of hydraulic pump that can gently go up and down |
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-
2020
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|---|---|---|---|---|
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| CN102285607A (en) * | 2011-07-15 | 2011-12-21 | 常熟通润汽车千斤顶有限公司 | Hoisting jack with low press hand |
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| CN207861778U (en) * | 2017-06-30 | 2018-09-14 | 上海云树知识产权咨询有限公司 | A kind of multiple field hydraulic jacking device for composite plate |
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| CN107777609A (en) * | 2017-09-29 | 2018-03-09 | 昆明理工大学 | A kind of adaptive variable-flow hydraulic jack |
| CN212269322U (en) * | 2020-05-29 | 2021-01-01 | 嘉兴市大通机械股份有限公司 | Manual pressing type jack for rehabilitation hanger columnar structure |
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|---|
| 王锦俞: "《汽车维修工具和量具》", vol. 1, 30 April 1991, 人民交通出版社, pages: 110 - 111 * |
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