CN202704930U - High-thrust jack - Google Patents
High-thrust jack Download PDFInfo
- Publication number
- CN202704930U CN202704930U CN 201220357495 CN201220357495U CN202704930U CN 202704930 U CN202704930 U CN 202704930U CN 201220357495 CN201220357495 CN 201220357495 CN 201220357495 U CN201220357495 U CN 201220357495U CN 202704930 U CN202704930 U CN 202704930U
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- piston
- slide bar
- chamber
- bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Actuator (AREA)
Abstract
Disclosed in the utility model is a high-thrust jack. The high-thrust jack comprises a cylinder body; a piston that is slided in a sealing mode along the inner wall of the cylinder body is arranged inside the cylinder body; a main cavity is arranged between the inner end surface of the piston and the inner bottom surface of the cylinder body; an externally pushed hydraulic fluid port communicated with the main cavity us arranged on the cylinder body; and a slide opening penetrating two ends of the piston is coaxially arranged at the middle portion of the piston. A slide bar is fixedly arranged on the inner bottom surface of the cylinder body, wherein the slide bar and the cylinder body are arranged coaxially; the outer wall of the slide bar and the slide opening are in a sealed and sliding fit; an expansion bar is fixedly and coaxially arranged at the outer end of the slide bar, wherein the diameter of the expansion bar is larger than that of the slide bar; an expansion sleeve with the sealed outer end is sleeved on the expansion bar in a sliding and sealing mode; and the inner end of the expansion sleeve and the outer end of the piston are correspondingly and fixedly connected together. Besides, an auxiliary cavity is arranged between the inner bottom surface of the expansion sleeve and the outer end surface of the expansion bar; and a slide bar oil duct that enables the main cavity and the auxiliary cavity to be communicated is arranged inside the slide bar. According to the utility model, the high-thrust jack has a reasonable structure. Under the circumstances that the volume is not increased, the upper limit of the external thrust can be improved. Besides, the jack can be operated conveniently. Therefore, the high-thrust jack is especially suitable for application to an occasion requiring the high thrust.
Description
Technical field
The utility model relates to a kind of high thrust jack.
Background technology
Jack is that a kind of the top with rigidity lifted part as equipment, the light little weight-lifting equipment of jacking weight in stroke by top bracket or bottom claw.Can be divided into 3 kinds of rack-jack, lifting screw and hydraulic jacks by architectural feature.Jack is the simplest weight-lifting equipment of a kind of lifting highly little (less than 1m).It has two kinds of mechanical type and fluid pressure types.Mechanical jack has again rack-and-pinion and spiral two kinds, because hoisting capacity is little, the operation effort generally only is used for flight-line maintenance work, and is inapplicable in repairing the bridge process.The fluid pressure type jack structure is compact, and stable working has self-locking action, so use extensively.Jack is mainly used in the departments such as factories and miness, communications and transportation as work such as Mechanical Help and other lifting, supports.Its structure is firm, flexibility and reliability lightly, and a people is portability and operation.Jack has adopted top quality material casting as a kind of range of use instrument widely, has guaranteed quality and the service life of jack.
On principle, hydraulic jack based on principle be pascal's principle, that is: liquid pressure everywhere is consistent, like this, in the system of balance, applied pressure is smaller above the smaller piston, and applied pressure is also larger on the large piston, can keep the static of liquid like this.So by the transmission of liquid, can obtain the different pressure on the different ends, so just can reach the purpose of a conversion.We common to hydraulic jack be exactly to have utilized this principle to reach the transmission of power.Traditional hydraulic jack generally comprises cylinder body, be provided with the piston that slides along the inboard wall of cylinder block sealing in the cylinder body, be installed with on the piston with the piston rod of piston to external extension, be provided with main chamber between piston inner end surface and the cylinder body inner bottom surface, cylinder body is provided with the extrapolation hydraulic fluid port that is communicated with main chamber.When carrying out liter the top, the high pressure liquid force feed is pressed into main chamber from the extrapolation hydraulic fluid port, the pressure of main intraluminal fluid force feed is converted into the thrust to the piston inner end surface, and like this, piston rod just stretches out cylinder body under the promotion of piston, has so just finished to rise to push work.When falling the top, reduce the hydraulic fluid pressure that passes in the extrapolation hydraulic fluid port, like this, piston rod just bounces back under the Action of Gravity Field of self gravitation or extraneous weight, and the hydraulic oil of oppressing simultaneously in the main chamber flows out, and has also just finished and has fallen the top operation.The conventional hydraulic jack, simple in structure, easy to operate, and cost is low, can realize liter top and fall pushing work, but its weak point is: the thrust size that traditional jack pair applies outward, depend on the pressure of hydraulic oil and the product value of piston inner end surface area, this product value is larger, and thrust is larger, otherwise, then less; In the situation that hydraulic fluid pressure and diameter of piston are determined, traditional jack pair extrapolability has also just been determined, can't promote its thrust upper limit, has limited its application in the high thrust occasion.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of rational in infrastructure for above-mentioned deficiency, in the situation that does not increase volume, can promote the extrapolability upper limit, and easy to operate high thrust jack.
For solving the problems of the technologies described above, this high thrust jack comprises cylinder body, be provided with the piston that slides along the inboard wall of cylinder block sealing in the cylinder body, be provided with main chamber between piston inner end surface and the cylinder body inner bottom surface, cylinder body is provided with the extrapolation hydraulic fluid port that is communicated with main chamber, its constructional feature is: the coaxial slide opening that connects the piston two ends that is provided with in piston middle part, be installed with the slide bar with the coaxial setting of cylinder body on the cylinder body inner bottom surface, slide bar outer wall and slide opening sealed sliding running-fit, the coaxial diameter expander bar larger than slide bar diameter that be installed with in slide bar outer end, slipper seal is set with the expansion cover of outer end sealing on the expander bar, the expansion cover is inner to be fixed together with the piston outer end is corresponding, be provided with secondary chamber between expansion cover inner bottom surface and the expander bar outer face, be provided with the slide bar oil duct that is communicated with main chamber and secondary chamber in the slide bar.
The high thrust jack of this structure is to be implemented in the situation that does not increase volume by the dual thrust structure, can promote the extrapolability upper limit, and easy to operate.
The dual thrust structure mainly refers to have two cover thrust structures in this high thrust jack, for convenient narration, be called main thrust structure and secondary thrust structure.Wherein, the main thrust structure comprises the piston that is arranged in the cylinder body and cooperates with the inboard wall of cylinder block slipper seal, and the piston middle part is provided with the slide opening at perforation piston two ends, and slide opening and piston coaxial setting that is to say that piston is circular setting.The main thrust structure also comprises the slide bar that is installed on the cylinder body inner bottom surface, slide bar and piston also coaxial setting, and the slide opening that passes piston extends to the cylinder body oral area.The slide bar outer wall cooperates with the slide opening inwall slipper seal of piston, and like this, slide bar not only can be for piston provides sliding support power, but also can play for piston the directional tagging of slip, helps piston smooth and easy slip in cylinder body.Piston inner end surface, corresponding with it cylinder body inner bottom surface, corresponding with it inboard wall of cylinder block, corresponding with it slide bar sidewall surround an airtight cavity jointly, i.e. main chamber, and main chamber is circular ring.The cylinder body outside is provided with the extrapolation hydraulic fluid port that is communicated with main chamber, can be to filling high pressure liquid force feed in the main chamber by the extrapolation hydraulic fluid port, and at this moment, the pressure of hydraulic oil self can be converted into the pressure to piston, thereby realizes the effect that pushing piston moves.
Secondary thrust structure mainly comprises the expander bar that is installed in the slide bar outer end, expander bar and the coaxial setting of slide bar.Slipper seal is set with along expander bar and expands in axial sliding cover on the expander bar, and the expansion cover is inner to be fixed together with the piston outer end is corresponding, and like this, piston and expansion cover just can synchronization actions.The sealing of expansion cover outer end arranges, and like this, has just consisted of an airtight cavity by expansion cover inner bottom surface, corresponding expander bar end face, corresponding expansion cover inwall, i.e. secondary chamber, and secondary chamber is cylindrical structural.Secondary thrust structure also comprises the slide bar oil duct that is arranged in the slide bar, and slide bar oil duct one end is communicated with main chamber, and the other end is communicated with secondary chamber.Like this, in the cylinder body during oiling, main chamber and secondary chamber can obtain the high pressure liquid force feed of uniform pressure simultaneously by the extrapolation hydraulic fluid port.Hydraulic oil in main chamber, the secondary chamber can be respectively be converted into thrust to piston and expansion cover with self pressure, and pushing piston and expansion cover are mobile respectively.Because piston and expansion cover are affixed integrative-structures, therefore, piston or the outside thrust of expansion cover are exactly that hydraulic oil is to the thrust sum of piston and expansion cover.
In this high thrust jack, the diameter of expander bar is greater than the diameter of slide bar, so the cross-sectional area in main chamber adds the inevitable rank street area greater than inner chamber of cylinder block of the cross-sectional area in secondary chamber.Like this, in the hydraulic fluid pressure situation identical with cylinder diameter, the cross-sectional area the when cross-sectional area the during acting of this high thrust hydraulic oil for lifting jacks is greater than traditional hydraulic oil for lifting jacks acting so can produce larger thrust, has improved the thrust upper limit.This high thrust jack, rational in infrastructure, take full advantage of the inner chamber of cylinder block space, drain the oil by pressurize to the extrapolation hydraulic fluid port oiling or step-down and can realize expanding the Telescopic of cover, also namely rise the top and fall the top function, operation is very easy.
As improvement, the cylinder body outer end is sealed and installed with the orienting sleeve of slipper seal suit expansion cover.
The Main Function of orienting sleeve is that slip cap is contained on the expansion cover periphery, leads for endwisely slipping of expansion cover, has guaranteed directivity and stability when the expansion cover axially slides.Orienting sleeve also has the effect of closed cylinder oral area, prevents that effectively the foreign material such as dust from entering cylinder body, improved the cleanliness level of inner chamber of cylinder block greatly.
As further improvement, establish the Packed outer anti-chamber that pushes away between inboard wall of cylinder block and the expansion cover outer wall, the expansion cover is inner to be provided with cavity and the outer anti-intercommunicating pore that the chamber is communicated with that pushes away between expansion cover inwall and the slide bar outer wall, and cylinder body is equipped with and the outer anti-retraction hydraulic fluid port that the chamber is communicated with that pushes away away from the other end of extrapolation hydraulic fluid port.
The outer anti-chamber that pushes away in the cylinder body is mainly centered on and is formed by the inboard wall of cylinder block of expanding cover outer wall, correspondence, corresponding piston outer face, corresponding orienting sleeve inner end surface, roughly is annular arrangement.Be convenient narration, the cavity with between the expansion cover inwall of slide bar outer wall and correspondence is referred to as the interior anti-chamber that pushes away.In the anti-chamber that pushes away mainly contain slide bar outer wall, corresponding expansion cover inwall, corresponding piston outer face, corresponding expander bar inner end surface around forming, roughly be annular arrangement.In the anti-bore that pushes away the chamber be less than the outer anti-bore that pushes away the chamber, both are nested relationship.By being arranged on the inner intercommunicating pore of expansion cover, can instead push away the chamber and the outer anti-chamber that pushes away is connected together with interior.By being arranged on the retraction hydraulic fluid port on the cylinder body, outside anti-chamber and the interior anti-filling high pressure liquid force feed in the chamber that pushes away of pushing away, at this moment, the hydraulic oil internal pressure can be converted into the thrust to piston outer face, expander bar inner end surface and orienting sleeve inner end surface.Because orienting sleeve inner end surface and expander bar inner end surface all are fixed together with cylinder body, therefore, during to retraction hydraulic fluid port servicing fluids force feed, hydraulic oil will inevitably move to the inner chamber of cylinder block bottom by pushing piston, and the expansion cover is retraction thereupon.So just played the effect that utilizes hydraulic oil to shrink this high thrust jack or fall the top, it is more time saving and energy saving, convenient to make retraction or fall top operation.
In sum, adopt the high thrust jack of this structure, rational in infrastructure, in the situation that does not increase volume, can promote the extrapolability upper limit, and easy to operate, be particularly suitable for using in the occasion that needs high thrust.
Description of drawings
By reference to the accompanying drawings the utility model is described in further details:
Fig. 1 is the structural representation of the utility model retracted state;
Fig. 2 is the structural representation of the utility model extended configuration.
Among the figure: 1 is cylinder body, and 2 is piston, and 3 is main chamber, and 4 are the extrapolation hydraulic fluid port, and 5 is slide opening, and 6 is slide bar, and 7 are the expansion cover, and 8 is secondary chamber, and 9 is the slide bar oil duct, and 10 is orienting sleeve, and 11 is expander bar, and 12 are the outer anti-chamber that pushes away, and 13 is intercommunicating pore, and 14 are the retraction hydraulic fluid port.
The specific embodiment
As shown in Figure 1 and Figure 2, this high thrust jack comprises the cylinder body 1 of an end opening, and cylinder body 1 is cylindrical.Be provided with two cover thrust structures in the cylinder body 1, for convenient narration, be called main thrust structure and secondary thrust structure.Wherein, the main thrust structure comprises and is arranged in the cylinder body 1 and the piston 2 that cooperates with cylinder body 1 inwall slipper seal that piston 2 middle parts are provided with the slide opening 5 at perforation piston 2 two ends, and slide opening 5 and piston 2 coaxial settings that is to say that piston 2 is circular setting.The main thrust structure also comprises the slide bar 6 that is installed on cylinder body 1 inner bottom surface, slide bar 6 and piston 2 also coaxial setting, and the slide opening 5 that passes piston 2 extends to cylinder body 1 oral area.Slide bar 6 outer walls cooperate with the slide opening 5 inwall slipper seals of piston 2, and like this, slide bar 6 not only can be for piston 2 provides sliding support power, but also can play for piston 2 directional tagging of slip, helps piston 2 in cylinder body 1 interior smooth and easy slip.Piston 2 inner end surfaces, corresponding with it cylinder body 1 inner bottom surface, corresponding with it cylinder body 1 inwall, corresponding with it slide bar 6 sidewalls surround an airtight cavity jointly, i.e. main chamber 3, and main chamber 3 is circular ring.Cylinder body 1 outside is provided with the extrapolation hydraulic fluid port 4 that is communicated with main chamber 3, can be to main chamber 3 interior filling high pressure liquid force feed by extrapolation hydraulic fluid port 4, and at this moment, the pressure of hydraulic oil self can be converted into the pressure to piston 2, thereby realizes the effect that pushing piston 2 moves.
Secondary thrust structure mainly comprises the expander bar 11 that is installed in slide bar 6 outer ends, expander bar 11 and slide bar 6 coaxial settings.Slipper seal is set with along expander bar 11 and expands in axial sliding cover 7 on the expander bar 11, expansion cover 7 the inners and corresponding being fixed together in piston 2 outer ends, and like this, piston 2 and expansion cover 7 just can synchronization actions.The sealing of expansion cover 7 outer ends arranges, and like this, overlap 7 inwalls and just consisted of an airtight cavity by expansion cover 7 inner bottom surfaces, corresponding expander bar 11 end faces, corresponding expansion, i.e. secondary chamber 8, secondary chamber 8 is cylindrical structural.Secondary thrust structure also comprises the slide bar oil duct 9 that is arranged in the slide bar 6, and slide bar oil duct 9 one ends are communicated with main chamber 3, and the other end is communicated with secondary chamber 8.Like this, during to cylinder body 1 interior oiling, main chamber 3 and secondary chamber 8 can obtain the high pressure liquid force feed of uniform pressure simultaneously by extrapolation hydraulic fluid port 4.Hydraulic oil in the main chamber 3, secondary chamber 8 can be respectively be converted into thrust to piston 2 and expansion cover 7 with self pressure, and pushing piston 2 and expansion cover 7 move respectively.Because piston 2 and expansion cover 7 are affixed integrative-structures, therefore, piston 2 or expansion cover 7 outside thrusts are exactly that hydraulic oil is to the thrust sum of piston 2 and expansion cover 7.
In this high thrust jack, the diameter of expander bar 11 is greater than the diameter of slide bar 6, so the cross-sectional area in main chamber 3 adds the inevitable rank street area greater than cylinder body 1 inner chamber of the cross-sectional area in secondary chamber 8.Like this, in the hydraulic fluid pressure situation identical with cylinder body 1 internal diameter, the cross-sectional area the when cross-sectional area during this high thrust hydraulic oil for lifting jacks acting is greater than traditional hydraulic oil for lifting jacks acting so can produce larger thrust, has improved the thrust upper limit.This high thrust jack, rational in infrastructure, take full advantage of cylinder body 1 intracavity space, drain the oil by pressurize to extrapolation hydraulic fluid port 4 oilings or step-down and can realize expanding the Telescopic of cover 7, also namely rise the top and fall the top function, operation is very easy.
Cylinder body 1 outer end is sealed and installed with orienting sleeve 10, and orienting sleeve 10 is the annular arrangement of suit expansion cover 7, and orienting sleeve 10 inwalls cooperate with the 7 periphery wall slipper seals of expansion cover.The Main Function of orienting sleeve 10 is that slip cap is contained on expansion cover 7 peripheries, leads for endwisely slipping of expansion cover 7, has guaranteed directivity and stability when expansion cover 7 endwisely slips.Orienting sleeve 10 also has the effect of closed cylinder 1 oral area, prevents that effectively the foreign material such as dust from entering cylinder body 1, improved the cleanliness level of cylinder body 1 inner chamber greatly.
In the present embodiment, establish the Packed outer anti-chamber 12 that pushes away between cylinder body 1 inwall and expansion cover 7 outer walls, expansion cover 7 the inners are provided with cavity and the outer anti-intercommunicating pore 13 that chamber 12 is communicated with that pushes away between expansion cover 7 inwalls and slide bar 6 outer walls, and cylinder body 1 is equipped with and the outer anti-retraction hydraulic fluid port 14 that chamber 12 is communicated with that pushes away away from the other end of extrapolation hydraulic fluid port 4.The outer anti-chamber 12 that pushes away in the cylinder body 1 is mainly centered on and is formed by cylinder body 1 inwall of expanding cover 7 outer walls, correspondence, corresponding piston 2 outer faces, corresponding orienting sleeve 10 inner end surfaces, roughly is annular arrangement.Be convenient narration, cavity between 7 inwalls is overlapped in slide bar 6 outer walls and corresponding expansion, be referred to as the interior anti-chamber that pushes away.In the anti-chamber that pushes away mainly contain slide bar 6 outer walls, corresponding expansion and overlap 7 inwalls, corresponding piston 2 outer faces, corresponding expander bar 11 inner end surfaces around forming, roughly be annular arrangement.In the anti-bore that pushes away the chamber be less than the outer anti-bore that pushes away chamber 12, both are nested relationship.By being arranged on the intercommunicating pore 13 of expansion cover 7 the inners, can instead push away the chamber and the outer anti-chamber 12 that pushes away is connected together with interior.By being arranged on the retraction hydraulic fluid port 14 on the cylinder body 1, outside anti-chamber 12 and the interior anti-filling high pressure liquid force feed in the chamber that pushes away of pushing away, at this moment, the hydraulic oil internal pressure can be converted into the thrust to piston 2 outer faces, expander bar 11 inner end surfaces and orienting sleeve 10 inner end surfaces.Because orienting sleeve 10 inner end surfaces and expander bar 11 inner end surfaces all are fixed together with cylinder body 1, therefore, during to retraction hydraulic fluid port 14 servicing fluids force feed, hydraulic oil will inevitably move to cylinder body 1 intracavity bottom by pushing piston 2, and expansion cover 7 is retraction thereupon.So just played the effect that utilizes hydraulic oil to shrink this high thrust jack or fall the top, it is more time saving and energy saving, convenient to make retraction or fall top operation.
Claims (3)
1. high thrust jack, comprise cylinder body (1), be provided with the piston (2) that slides along cylinder body (1) inner wall sealing in the cylinder body (1), be provided with main chamber (3) between piston (2) inner end surface and cylinder body (1) inner bottom surface, cylinder body (1) is provided with the extrapolation hydraulic fluid port (4) that is communicated with main chamber (3), it is characterized in that: the coaxial slide opening (5) that connects piston (2) two ends that is provided with in piston (2) middle part, be installed with the slide bar (6) with the coaxial setting of cylinder body (1) on cylinder body (1) inner bottom surface, slide bar (6) outer wall and slide opening (5) sealed sliding running-fit, the coaxial diameter expander bar (11) larger than slide bar (6) diameter that be installed with in slide bar (6) outer end, the upper slipper seal of expander bar (11) is set with the expansion cover (7) of outer end sealing, expansion cover (7) the inner and corresponding being fixed together in piston (2) outer end, be provided with secondary chamber (8) between expansion cover (7) inner bottom surface and expander bar (11) outer face, be provided with the slide bar oil duct (9) that is communicated with main chamber (3) and secondary chamber (8) in the slide bar (6).
2. high thrust jack as claimed in claim 1 is characterized in that: cylinder body (1) outer end is sealed and installed with the orienting sleeve (10) of slipper seal suit expansion cover (7).
3. high thrust jack as claimed in claim 2, it is characterized in that: establish the Packed outer anti-chamber (12) that pushes away between cylinder body (1) inwall and expansion cover (7) outer wall, expansion cover (7) the inner is provided with cavity and the outer anti-intercommunicating pore (13) that chamber (12) is communicated with that pushes away between expansion cover (7) inwall and slide bar (6) outer wall, and cylinder body (1) is equipped with and the outer anti-retraction hydraulic fluid port (14) that chamber (12) is communicated with that pushes away away from the other end of extrapolation hydraulic fluid port (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357495 CN202704930U (en) | 2012-07-24 | 2012-07-24 | High-thrust jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220357495 CN202704930U (en) | 2012-07-24 | 2012-07-24 | High-thrust jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202704930U true CN202704930U (en) | 2013-01-30 |
Family
ID=47585254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220357495 Expired - Fee Related CN202704930U (en) | 2012-07-24 | 2012-07-24 | High-thrust jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202704930U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621305A (en) * | 2016-03-03 | 2016-06-01 | 郑州四维矿业机械有限责任公司 | Piston and jack using piston |
| CN106438566A (en) * | 2016-11-23 | 2017-02-22 | 韶关市博仕乐液压机械制造有限公司 | Hydrocylinder with built-in circular oil-way |
| CN116696888A (en) * | 2023-07-21 | 2023-09-05 | 江苏翔力重工科技有限公司 | Built-in high-pressure oil cylinder with continuous supercharging function |
-
2012
- 2012-07-24 CN CN 201220357495 patent/CN202704930U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105621305A (en) * | 2016-03-03 | 2016-06-01 | 郑州四维矿业机械有限责任公司 | Piston and jack using piston |
| CN105621305B (en) * | 2016-03-03 | 2018-09-28 | 郑州四维矿业机械有限责任公司 | A kind of piston and the jack using the piston |
| CN106438566A (en) * | 2016-11-23 | 2017-02-22 | 韶关市博仕乐液压机械制造有限公司 | Hydrocylinder with built-in circular oil-way |
| CN116696888A (en) * | 2023-07-21 | 2023-09-05 | 江苏翔力重工科技有限公司 | Built-in high-pressure oil cylinder with continuous supercharging function |
| CN116696888B (en) * | 2023-07-21 | 2024-01-30 | 江苏翔力重工科技有限公司 | Built-in high-pressure oil cylinder with continuous supercharging function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203835821U (en) | Piston-type energy accumulator | |
| CN202704930U (en) | High-thrust jack | |
| CN205653111U (en) | Hydraulic jack | |
| CN204664046U (en) | A kind of compression type environmental sanitation boats and ships Double Acting Telescopic Hydraulic Cylinder | |
| CN203865956U (en) | Jack suitable for small space | |
| CN203023169U (en) | Synchronous secondary telescopic cylinder | |
| CN202690578U (en) | Rapid oil cylinder | |
| CN202611723U (en) | Hydraulic upright column | |
| CN203670347U (en) | High-pressure swing clamp cylinder | |
| CN202704937U (en) | Large-stroke jack | |
| CN201982410U (en) | Single acting piston-cylinder with upper buffer function | |
| CN204689534U (en) | A kind of binodal upright jack | |
| CN203809412U (en) | Special multilevel hydraulic cylinder for elevator | |
| CN200940616Y (en) | Plunger hydraulic oil cylinder of braker | |
| CN107542723A (en) | A kind of nothing changes the single-acting two-stage hydraulic cylinder of level impact | |
| CN201010481Y (en) | Hydraulic jack | |
| CN101817490B (en) | Linkage type stroke amplifying lifting column | |
| CN203756631U (en) | Hydraulic cylinder capable of reducing liquid compression influences | |
| CN201980930U (en) | Hydraulic jack | |
| CN203476890U (en) | Hydraulic oil cylinder for three-roller plate bending machine | |
| CN204434186U (en) | A kind of doublestroke dual thrust hydraulic jack | |
| CN213420503U (en) | High-stability lifting cylinder seat for filling machine | |
| CN202971408U (en) | Internal bidirectional telescopic oil cylinder | |
| CN202465172U (en) | Cylinder installing jack | |
| CN203476911U (en) | Hydraulic oil cylinder with reset device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130130 Termination date: 20150724 |
|
| EXPY | Termination of patent right or utility model |