CN103663247A - Hydraulic jack - Google Patents
Hydraulic jack Download PDFInfo
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- CN103663247A CN103663247A CN201210356713.2A CN201210356713A CN103663247A CN 103663247 A CN103663247 A CN 103663247A CN 201210356713 A CN201210356713 A CN 201210356713A CN 103663247 A CN103663247 A CN 103663247A
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- oil
- hydraulic
- piston rod
- hydraulic jack
- oil return
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Abstract
The invention relates to the technical filed of jacking devices, particularly to a hydraulic jack. The hydraulic jack comprises a base, a hydraulic pump, a hydraulic cylinder and a piston rod and also comprises a center swing tubing which is fixed on the base; the upper end of the center swing tubing is communicated with the inner chamber of the piston rod and matched with a piston rod joint which is fixedly connected with the lower end of the piston rod in a seal sliding mode; the center swing tubing is communicated with the hydraulic pump through a first check valve which is arranged on an oil rapid feeding oil channel; the base is provided with a pressure regulating assembly. According to the hydraulic jack, the center swing tubing, an oil rapid feeding oil channel pipeline and an oil slow feeding oil channel pipeline are arranged, the pressure regulating assembly is matched with the hydraulic jack to achieve the hydraulic jacking work, and accordingly the jacking speed can be significantly improved under the condition that the long distance light load or no-load is jacked, meanwhile jacking of the overloading load can be achieved well, and accordingly the labor intensity is reduced and the service life of the hydraulic pump is extended.
Description
Technical field
The present invention relates to jacking apparatus technical field, particularly relate to a kind of hydraulic jack.
Background technology
Existing hydraulic jack, the general hydraulic oil increment that all adopts promotes the hoisting way at a slow speed that press on top, hydraulic jack general by Hydraulic Pump, base, piston rod, hydraulic actuating cylinder and fuel tank sleeve, the compositions such as top cap and oil return assembly, during work, operation Hydraulic Pump handle, the hydraulic oil of certain volume can be pressed in hydraulic actuating cylinder inner chamber, thereby make the certain distance of piston rod jacking, under zero load or underloading, caused that jacking speed is slow and travel time is long, unloaded lower operation often, labour intensity is high, efficiency is low, the problem of the easy wearing and tearing of Hydraulic Pump etc., these problems particularly the unloaded jacking length of microscler jack apart from time particularly evident, affected greatly work efficiency.
Summary of the invention
The shortcoming of prior art, the object of the invention is to solve hydraulic jack of the prior art and withstands under zero load or underloading in view of the above, and jacking speed is slow and travel time is long, unloaded lower operation often, intensity is high, and efficiency is low, the problem of the easy wearing and tearing of Hydraulic Pump etc.
For achieving the above object, the invention provides a kind of hydraulic jack, comprise: base, Hydraulic Pump, hydraulic actuating cylinder and piston rod, also include and be fixed on described base Shang center swing oil pipe, described center swings the upper end of oil pipe and the inner chamber of described piston rod communicates, and the piston rod attachment being fixedly connected with described piston-rod lower end becomes sealing bearing fit, described center swings the first check valve arranging on the fast oil-feed oil circuit of oil pipe warp and communicates with described Hydraulic Pump; On described base, be also provided with a pressure regulation assembly.
Preferably, in described pressure regulation assembly, be provided with a cone valve, through pressure spring, pressure regulating screw, rely on the oil circuit hole of fast oil-feed oil circuit successively, described pressure regulating screw is also provided with rectangular seal and sealing screw outward successively, and the outside of described cone valve is also provided with slow-motion oil oil circuit and communicates with the inner chamber of described hydraulic actuating cylinder through the second check valve.
Preferably, also be provided with off-load oil return assembly, it includes fuel-return valve assembly and oil return hand wheel component, locating dowel pin in described fuel-return valve assembly leans on the 3rd check valve through stage clip, described stage clip bottom is also provided with rectangular seal, sealing screw successively, described fuel-return valve assembly communicates with the inner chamber of described hydraulic actuating cylinder through described the 3rd check valve, and the outside of described locating dowel pin is also provided with the oil return circuit communicating with described center swing oil pipe and shoe cream room; Oil return handwheel in described oil return hand wheel component is set on an oil return valve rod by hexagonal nut, and the lower end of described oil return valve rod is also provided with the rectangular seal part circle that can screw in oil return circuit.
Preferably, the sectional area of the inner diameter hole of described center swing oil pipe is: 7.85mm
2to 15.7mm
2.
Preferably, between the lower end of described piston rod and the inwall of described hydraulic actuating cylinder, be provided with O RunddichtringO, between the lower end of described center swing oil pipe and piston rod attachment, be provided with ladder-shaped sealing ring.
Hydraulic jack provided by the invention, by being provided with, center swings beam hanger and pipeline fast, slow-motion oil circuit arranges, and be combined with the hydraulic lifting work that completes of pressure regulation assembly, make under the underloading of the long distance of jacking or zero load greatly degree raising jacking speed, can better complete heavily loaded load jacking simultaneously, not only alleviate labour intensity, and extended the service life of Hydraulic Pump.
Accompanying drawing explanation
Fig. 1 be hydraulic jack in the embodiment of the present invention front view and on part sectional view;
Fig. 2 is the A-A section-drawing on the Fig. 1 in the embodiment of the present invention.
The specific embodiment
Below, by specific instantiation explanation embodiments of the present invention, those skilled in the art can understand other advantages of the present invention and effect easily by the disclosed content of this specification sheets.The present invention can also be implemented or be applied by the other different specific embodiment, and the every details in this specification sheets also can be based on different viewpoints and application, carries out various modifications or change not deviating under spirit of the present invention.
It should be noted that, appended graphic the illustrated structure of this specification sheets, ratio, size etc., equal contents in order to coordinate specification sheets to disclose only, for person skilled in the art scholar, understand and read, not in order to limit the enforceable qualifications of the present invention, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, not affecting under the effect that the present invention can produce and the object that can reach, all should still drop on disclosed technology contents and obtain in the scope that can contain.Simultaneously, in this specification sheets, quote as " on ", the term of D score, " left side ", " right side ", " centre " and " " etc., also only for ease of understanding of narrating, but not in order to limit the enforceable scope of the present invention, the change of its relativeness or adjustment, under without essence change technology contents, when being also considered as the enforceable category of the present invention.
Shown in Fig. 1 and Fig. 2, its front view for a kind of hydraulic jack providing of the present invention and the part sectional view on it and the A-A section-drawing on front view, described hydraulic jack comprises: base 10, Hydraulic Pump 60, hydraulic actuating cylinder 12 and piston rod 13, also include and be fixed on base 10Shang center swing oil pipe 14, the sectional area that described center swings oil pipe 14 inner diameter holes is set to: 7.85mm
2to 15.7mm
2center swings the upper end of oil pipe 14 and the inner chamber 131 of piston rod 13 communicates, and 133 one-tenth sealing bearing fits of the piston rod attachment being fixedly connected with piston rod 13 lower ends, center swings oil pipe 14 and communicates with Hydraulic Pump 60 through upper the first check valve V1 arranging of fast oil-feed oil circuit I-1; On described base 10, be also provided with a pressure regulation assembly 30.
In described pressure regulation assembly 30, be provided with a cone valve 32, through pressure spring 33, pressure regulating screw 34, rely on the oil circuit hole of fast oil-feed oil circuit I-1, outer rectangular seal 35 and the sealing screw 36 of being also provided with of pressure regulating screw 34, the outside of described cone valve 32 is also provided with slow-motion oil oil circuit I-2 and communicates with hydraulic actuating cylinder inner chamber 121 through the second check valve V2.
Between the inwall of the lower end of described piston rod 13 and described hydraulic actuating cylinder 12, be provided with O RunddichtringO 132, between the lower end of described center swing oil pipe 14 and piston rod attachment 133, be provided with ladder-shaped sealing ring 134, the raising that is restricting to a certain extent Hydraulic Elements and hydraulic efficiency pressure system Performance And Reliability energy of the sealing property of described sealing member.
In described hydraulic jack, be also provided with off-load oil return assembly, it comprises: fuel-return valve assembly 40 and oil return hand wheel component 50, locating dowel pin 42 in described fuel-return valve assembly 40 leans on the 3rd check valve through stage clip 43, described stage clip 43 bottoms are also provided with rectangular seal 44, sealing screw 45 successively, described fuel-return valve assembly communicates with described hydraulic actuating cylinder inner chamber 121 through described the 3rd check valve V3, and the outside of described locating dowel pin 42 is also provided with the oil return circuit O-1 communicating with described center swing oil pipe 14 and shoe cream room 111; Oil return handwheel 51 in described oil return hand wheel component 50 is set on an oil return valve rod 53 by hexagonal nut 52, and the lower end of described oil return valve rod is also provided with the rectangular seal part circle 54 that can screw in oil return circuit O-1.
The working process of described hydraulic jack is as follows, and the oil return valve rod 53 in oil return hand wheel component 50 is closed; Because the pump core 61 of Hydraulic Pump 60 is hinge engaging structure with stretcher 70, when stretcher 70 up-and-down movement, pump core 61 is upwards moved and pull-up at a certain angle by stretcher 70, now the hydraulic oil in shoe cream room 111 is malleation, will wash the check valve (not shown) that is arranged on Hydraulic Pump 60 and 11 settings of fuel tank sleeve open, immediately hydraulic oil injection liquid press pump 60 inner chambers; Along with moving downward of stretcher 70, will drive the pump core 61 of Hydraulic Pump 60 to move downward, the check valve that Hydraulic Pump 60 and fuel tank sleeve are 11 is closed by non-return.
Now the first check valve V1 opens, the hydraulic oil of injection liquid press pump 60 inner chambers swings oil pipe 14 through fast oil-feed oil circuit I-1 via center and is pressed in piston rod cavity 131, effect lower piston rod 13 at hydraulic fluid pressure rises, because piston rod cavity 131 volumes are less, piston rod 13 is promoted lower upward movement by hydraulic oil, thereby realizes the rapid jacking of jack under zero load or underloading.
When the pressure in hydraulic actuating cylinder 12 reaches the pressure load of valve module of voltage regulation 30 levelling, need to increase top lift and bear heavily loaded load, open cone valve 32, stage clip 33 shrinks simultaneously, slow-motion oil oil circuit I-2 is communicated with fast oil-feed oil circuit I-1, now, the the first check valve V1 arranging in the fast oil-feed oil circuit I-1 that center swing oil pipe 14 is connected is closed, the second check valve V2 in slow-motion oil oil circuit I-2 simultaneously opens, continuous up-and-down movement along with stretcher 70, hydraulic oil in Hydraulic Pump 60 enters hydraulic actuating cylinder inner chamber 121 through slow-motion oil oil circuit I-2, along with pump core 51 up-and-down movements, hydraulic oil in shoe cream room 21 is continued through slow-motion oil oil circuit I-2 injection liquid cylinder pressure inner chamber 121, hydraulic pressure oil mass constantly increases, under the antagonistic force of object, the oil pressure of hydraulic actuating cylinder inner chamber 121 increases, because the volume of hydraulic actuating cylinder 121 is larger, hydraulic oil rises relatively slow in order to realize the heavy duty of jacking at a slow speed load.
After jacking work completes, unclamp the fuel-return valve handwheel 51 in fuel-return valve Handleset 50, the lower end of oil return valve rod 53 is arranged with the cylindrical rectangular seal 54 that can screw in oil return circuit O-1, described rectangular seal 54 is opened or is opened by part, now the stage clip in fuel-return valve assembly 40 43 shrinks, the 3rd check valve V3 opens, piston rod cavity 131 and hydraulic actuating cylinder inner chamber 121 are all connected with shoe cream room 111, make the hydraulic oil in piston rod cavity 131 and hydraulic actuating cylinder inner chamber 121 come off-load oil return at a slow speed to enter the interior storage of shoe cream room 111 through oil return circuit O-1, simultaneously, piston rod 13 resets to enter mode of operation next time by off-load.
Hydraulic jack provided by the invention, the pipeline that swings beam hanger 14 and fast oil-feed oil circuit I-1, slow-motion oil oil circuit I-2 by being provided with center arranges, and be combined with the hydraulic lifting work that completes of pressure regulation assembly 30, make under the underloading of the long distance of jacking or zero load greatly degree raising jacking speed, can better complete heavily loaded load jacking simultaneously, not only alleviate labour intensity, and extended the service life of Hydraulic Pump.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all can, under spirit of the present invention and category, modify or change above-described embodiment.Therefore, such as in affiliated technical field, have and conventionally know that the knowledgeable, not departing from all equivalence modifications that complete under disclosed spirit and technological thought or changing, must be contained by claim of the present invention.
Claims (5)
1. a hydraulic jack, comprise: base, Hydraulic Pump, hydraulic actuating cylinder and piston rod, it is characterized in that, also include and be fixed on described base Shang center swing oil pipe, described center swings the upper end of oil pipe and the inner chamber of described piston rod communicates, and the piston rod attachment being fixedly connected with described piston-rod lower end becomes sealing bearing fit, described center swings the first check valve arranging on the fast oil-feed oil circuit of oil pipe warp and communicates with described Hydraulic Pump; On described base, be also provided with a pressure regulation assembly.
2. hydraulic jack according to claim 1, it is characterized in that, in described pressure regulation assembly, be provided with once cone valve, through pressure spring, pressure regulating screw, rely on the oil circuit hole of fast oil-feed oil circuit successively, described pressure regulating screw is also provided with rectangular seal and sealing screw outward successively, and the outside of described cone valve is also provided with slow-motion oil oil circuit and communicates with the inner chamber of described hydraulic actuating cylinder through the second check valve.
3. hydraulic jack according to claim 1, it is characterized in that, also be provided with off-load oil return assembly, it includes fuel-return valve assembly and oil return hand wheel component, locating dowel pin in described fuel-return valve assembly leans on the 3rd check valve through stage clip, described stage clip bottom is also provided with rectangular seal, sealing screw successively, described fuel-return valve assembly communicates with the inner chamber of described hydraulic actuating cylinder through described the 3rd check valve, and the outside of described locating dowel pin is also provided with the oil return circuit communicating with described center swing oil pipe and shoe cream room; Oil return handwheel in described oil return hand wheel component is set on an oil return valve rod by hexagonal nut, and the lower end of described oil return valve rod is also provided with the conical seal ring that can screw in oil return circuit.
4. hydraulic jack according to claim 1, is characterized in that, the sectional area that described center swings pipe aperture hole is: 7.85mm
2to 15.7mm
2.
5. hydraulic jack according to claim 1, is characterized in that, between the lower end of described piston rod and the inwall of described hydraulic actuating cylinder, is provided with O RunddichtringO, between the lower end of described center swing oil pipe and piston rod attachment, is provided with ladder-shaped sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210356713.2A CN103663247A (en) | 2012-09-21 | 2012-09-21 | Hydraulic jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210356713.2A CN103663247A (en) | 2012-09-21 | 2012-09-21 | Hydraulic jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103663247A true CN103663247A (en) | 2014-03-26 |
Family
ID=50302178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210356713.2A Pending CN103663247A (en) | 2012-09-21 | 2012-09-21 | Hydraulic jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103663247A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210983A (en) * | 2014-09-01 | 2014-12-17 | 郝迎吉 | Mechanical airplane jack |
| CN110902594A (en) * | 2019-12-13 | 2020-03-24 | 常熟通润汽车零部件股份有限公司 | Double-cylinder horizontal jack |
-
2012
- 2012-09-21 CN CN201210356713.2A patent/CN103663247A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210983A (en) * | 2014-09-01 | 2014-12-17 | 郝迎吉 | Mechanical airplane jack |
| CN110902594A (en) * | 2019-12-13 | 2020-03-24 | 常熟通润汽车零部件股份有限公司 | Double-cylinder horizontal jack |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |