CN201827169U - Multilevel hydraulic cylinder with front-mounted hydraulic fluid port - Google Patents
Multilevel hydraulic cylinder with front-mounted hydraulic fluid port Download PDFInfo
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- CN201827169U CN201827169U CN2010205575178U CN201020557517U CN201827169U CN 201827169 U CN201827169 U CN 201827169U CN 2010205575178 U CN2010205575178 U CN 2010205575178U CN 201020557517 U CN201020557517 U CN 201020557517U CN 201827169 U CN201827169 U CN 201827169U
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Abstract
The utility model discloses a multi-level hydraulic cylinder with a front-mounted hydraulic fluid port, which belongs to the technical field of hydraulic cylinders and comprises a cylinder block, a front cover, a primary piston rod and a secondary piston rod. The primary piston rod is arranged in the cylinder block, the secondary piston rod is disposed in the primary piston rod, a primary piston and a secondary piston are respectively arranged at the rear end of the primary piston rod and the rear end of the secondary piston rod, the primary piston rod is a single-layered cylinder barrel, a cavity II is disposed at the end, which is connected with the secondary piston, of the secondary piston rod, a cavity I is arranged in the primary piston, a hydraulic fluid hole I which communicates the cavity I with a primary rod cavity is arranged on the primary piston, a casing with an axial through hole is axially disposed in the cavity I, the other end of the casing extends into the cavity II, clearances are reserved among the casing and the bottom and the side wall of the cavity II, and a hydraulic fluid port II which communicates the cavity II with a secondary rod cavity is arranged on the secondary piston rod. The multi-level hydraulic cylinder resolves the problem that an existing multilevel hydraulic cylinder is required to be welded so as to be easy in leakage.
Description
Technical field
The utility model relates to the oil hydraulic cylinder technical field, especially a kind of hydraulic fluid port front-located mode multistage hydraulic cylinder.
Background technique
As shown in Figure 1, the multistage hydraulic cylinder of prior art mainly comprise housing assembly, first stage piston bar 2 ' and first stage piston 8 ', second piston rod 1 ' and second piston 7 ', wherein first stage piston bar 2 ' be is an one by the weldering of two cylinder barrels covers, between two cylinder barrels annular space is arranged, can form a hydraulic path.Hydraulic oil enters in the first order rod chamber of oil cylinder by preceding hydraulic fluid port, promote piston reset, simultaneously hydraulic oil by first stage piston bar 2 ' on the C mouth enter into first stage piston bar 2 ' toroidal cavity in, again by first stage piston bar 2 ' on the D mouth enter in the partial rod chamber, promote second piston 7 ' reset.Because first stage piston bar 2 ' and be to be one by the weldering of two cylinder barrels covers, its complex structure, and need to weld between two cylinder barrels, in case weld defects occurs, will cause that oil cylinder leaks; Secondly, if improve the working pressure of oil cylinder, then cover be welded into first stage piston bar 2 ' the wall thickness of two cylinder barrels all want corresponding increase, not only influence the overall dimensions layout of oil cylinder, the while has also increased the cost of material of oil cylinder.
The model utility content
At the above-mentioned defective that exists in the prior art, it is a kind of simple in structure that the utility model provides, the new multistage oil hydraulic cylinder that difficulty of processing is low, the problem that its oil hydraulic cylinder that causes because of the needs welding that has solved existing multistage hydraulic cylinder existence easily leaks has been simplified the overall dimensions layout of oil hydraulic cylinder simultaneously and has been reduced cost of material.
The utility model is achieved by the following technical solution: a kind of hydraulic fluid port front-located mode multistage hydraulic cylinder, comprise cylinder body, protecgulum, be located at the first stage piston bar in the cylinder body, be located at the second piston rod in the first stage piston bar, first stage piston rod rear end and second piston rod rear end are respectively arranged with first stage piston and second piston, described first stage piston bar is the individual layer cylinder barrel, be provided with the cavity II in the piston rod of described second piston rod and second piston connecting end, described first stage piston inside is provided with the cavity I, first stage piston is provided with the oilhole I of the rod chamber that is communicated with cavity I and one-level, in the cavity I, axially be provided with the sleeve pipe that has axial hole, the other end of sleeve pipe extends in the cavity II, all have the gap between the bottom of described sleeve pipe and described cavity II and the sidewall, second piston rod is provided with the oilhole II of the rod chamber that is communicated with cavity II and secondary.
Working procedure of the present utility model is: hydraulic oil enters in the first order rod chamber of oil hydraulic cylinder by filler opening, the promotion first stage piston resets, hydraulic oil enters into the cavity I of first stage piston inside by the oilhole I on the first stage piston simultaneously, endoporus through sleeve pipe enters in the partial rod chamber from the oilhole II on the second piston rod again, promotes second piston and resets.
Preceding hydraulic fluid port of the present utility model can be arranged on the anterior of cylinder barrel or be arranged on the protecgulum.
The beneficial effects of the utility model are: the utility model is simple in structure, design ingenious, reasonable, it designs sleeve pipe by reaching at design oil-feed path on the first stage piston in second piston rod and between the internal cavities of first stage piston, make hydraulic oil enter the rod chamber of secondary by sleeve pipe by first stage piston, thereby promotion piston reset, this kind structural design have been avoided the original twin-tub jacket casing weldering design of first stage piston bar.The first stage piston bar adopts the design of individual layer cylinder barrel, greatly reduce the difficulty of processing of piston rod, the phenomenon that the oil hydraulic cylinder that causes because of weld defects that this kind design has simultaneously occurred when also having avoided original twin-tub jacket casing to weld easily leaks makes the reliability of oil hydraulic cylinder be greatly improved; Secondly, this kind structural design has been simplified the overall dimensions layout of oil hydraulic cylinder, has reduced cost of material.
Description of drawings
Fig. 1 is the structural representation of the multistage hydraulic cylinder of prior art;
Fig. 2 is a structural representation of the present utility model;
Among the figure, 1, second piston rod, 2, the first stage piston bar, 3, protecgulum II, 4, protecgulum I, 5, preceding hydraulic fluid port, 6, cylinder body, 7, second piston, 8, first stage piston, 9, the oilhole I, 10, sleeve pipe, 11, back hydraulic fluid port, 12, cavity I, 13, piston packing, 14, the oilhole II, 15, cavity II, 16, bonnet, 1 ', the second piston rod of the multistage hydraulic cylinder of prior art, 2 ', the first stage piston bar of the multistage hydraulic cylinder of prior art, 7 ', the second piston of the multistage hydraulic cylinder of prior art, 8 ', the first stage piston of the multistage hydraulic cylinder of prior art.
Embodiment
Embodiment below in conjunction with accompanying drawing and indefiniteness is further described the utility model:
As shown in Figure 2, a kind of hydraulic fluid port front-located mode multistage hydraulic cylinder, comprise cylinder body 6, protecgulum I 4, protecgulum II 3, bonnet 16, first stage piston bar 2 and first stage piston 8, second piston rod 1 and second piston 7, wherein, the front end of cylinder body 6 is provided with preceding hydraulic fluid port 5, bonnet 16 is provided with back hydraulic fluid port 11, first stage piston bar 2 is located in the cylinder body 6, it is the individual layer cylinder barrel of inner hollow, be provided with protecgulum I 4 between its front end and the cylinder body 6, its rear end is provided with first stage piston 8, and the inside of first stage piston 8 is provided with cavity I 12, is provided with the oilhole I 9 of the rod chamber that is communicated with cavity I 12 and one-level on first stage piston 8.Second piston rod 1 is located in the cavity of first stage piston bar 2, be provided with protecgulum II 3 between its front end and the first stage piston bar 2, its rear end is provided with second piston 7, be provided with cavity II 15 in the piston rod of second piston rod 1 rear end, second piston rod 1 is provided with the oilhole II 14 that is communicated with cavity II 15 and secondary rod chamber.Axially be provided with the sleeve pipe 10 that has axial hole in the cavity I 12 of first stage piston 8 inside, an end of sleeve pipe 10 is fixed in the cavity I 12, and its other end extends in the cavity II 15, all has the gap between the bottom of sleeve pipe 10 and cavity II 15 and the sidewall.Form hydraulic path between the rod chamber of oilhole I 9, cavity I 12, sleeve pipe 10, oilhole I 14 and secondary.For guaranteeing sealing, be equipped with piston packing 13 on first stage piston 8 and the second piston 7.
Working procedure of the present utility model is: hydraulic oil enters in the first order rod chamber of oil hydraulic cylinder by preceding hydraulic fluid port 5, promoting first stage piston 8 resets, hydraulic oil enters into the cavity I 12 of first stage piston 8 inside by the oilhole I 9 on the first stage piston 8 simultaneously, enter in the partial rod chamber from oilhole II 14 through the endoporus of sleeve pipe 10 and the gap between cavity II 15 and the sleeve pipe 10 again, promote second piston 7 and reset.
Other parts of present embodiment adopt prior art, do not repeat them here.
The foregoing description only is used for explanation of the present utility model, is not to its restriction, and those skilled in the art also can make a change on this basis.
Claims (1)
1. hydraulic fluid port front-located mode multistage hydraulic cylinder, comprise cylinder body (6), protecgulum, be located at the first stage piston bar (2) in the cylinder body (6), be located at the second piston rod (1) in the first stage piston bar (2), first stage piston bar (2) rear end and second piston rod (1) rear end are respectively arranged with first stage piston (8) and second piston (7), it is characterized in that: described first stage piston bar (2) is the individual layer cylinder barrel, be provided with cavity II (15) in the piston rod of described second piston rod (1) and second piston (7) connecting end, described first stage piston (8) inside is provided with cavity I (12), first stage piston (8) is provided with the oilhole I (9) of the rod chamber that is communicated with cavity I (12) and one-level, in cavity I (12), axially be provided with the sleeve pipe (10) that has axial hole, the other end of sleeve pipe (10) extends in the cavity II (15), all have the gap between the bottom of described sleeve pipe (10) and described cavity II (15) and the sidewall, second piston rod (1) is provided with the oilhole II (14) of the rod chamber that is communicated with cavity II (15) and secondary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205575178U CN201827169U (en) | 2010-10-12 | 2010-10-12 | Multilevel hydraulic cylinder with front-mounted hydraulic fluid port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205575178U CN201827169U (en) | 2010-10-12 | 2010-10-12 | Multilevel hydraulic cylinder with front-mounted hydraulic fluid port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201827169U true CN201827169U (en) | 2011-05-11 |
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ID=43965708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205575178U Expired - Fee Related CN201827169U (en) | 2010-10-12 | 2010-10-12 | Multilevel hydraulic cylinder with front-mounted hydraulic fluid port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201827169U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102720725A (en) * | 2012-06-14 | 2012-10-10 | 尼玛克焊接技术(北京)有限公司 | Multi-stage push cylinder |
| CN102852896A (en) * | 2012-07-26 | 2013-01-02 | 沈姝君 | Double-action multistage hydraulic oil cylinder with solid piston rod |
| WO2013067799A1 (en) * | 2011-11-11 | 2013-05-16 | 湖南三一智能控制设备有限公司 | Multi-stage and single-action hydraulic cylinder and engineering machinery having same |
| CN103174834A (en) * | 2013-04-10 | 2013-06-26 | 玉林市川迪机器制造有限公司 | Sealing device of excavator tension track oil cylinder |
| CN105736511A (en) * | 2016-04-18 | 2016-07-06 | 苏州市汉诺威升降台有限公司 | Hydraulic cylinder used for elevator |
| CN105937510A (en) * | 2016-06-23 | 2016-09-14 | 莱州兴达液压机械科技有限公司 | Rapid pressurizing oil cylinder |
| CN107542723A (en) * | 2017-10-13 | 2018-01-05 | 烟台未来自动装备有限责任公司 | A kind of nothing changes the single-acting two-stage hydraulic cylinder of level impact |
| CN107654443A (en) * | 2017-08-28 | 2018-02-02 | 无锡瑞真精机股份有限公司 | Telescopic hydraulic makes concentric mechanism by oneself |
-
2010
- 2010-10-12 CN CN2010205575178U patent/CN201827169U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013067799A1 (en) * | 2011-11-11 | 2013-05-16 | 湖南三一智能控制设备有限公司 | Multi-stage and single-action hydraulic cylinder and engineering machinery having same |
| CN102720725A (en) * | 2012-06-14 | 2012-10-10 | 尼玛克焊接技术(北京)有限公司 | Multi-stage push cylinder |
| CN102720725B (en) * | 2012-06-14 | 2015-04-22 | 尼玛克焊接技术(北京)有限公司 | Multi-stage push cylinder |
| CN102852896A (en) * | 2012-07-26 | 2013-01-02 | 沈姝君 | Double-action multistage hydraulic oil cylinder with solid piston rod |
| CN102852896B (en) * | 2012-07-26 | 2015-09-30 | 沈姝君 | A kind of Double-action multistage hydraulic oil cylinder with solid piston rod |
| CN103174834A (en) * | 2013-04-10 | 2013-06-26 | 玉林市川迪机器制造有限公司 | Sealing device of excavator tension track oil cylinder |
| CN105736511A (en) * | 2016-04-18 | 2016-07-06 | 苏州市汉诺威升降台有限公司 | Hydraulic cylinder used for elevator |
| CN105937510A (en) * | 2016-06-23 | 2016-09-14 | 莱州兴达液压机械科技有限公司 | Rapid pressurizing oil cylinder |
| CN107654443A (en) * | 2017-08-28 | 2018-02-02 | 无锡瑞真精机股份有限公司 | Telescopic hydraulic makes concentric mechanism by oneself |
| CN107654443B (en) * | 2017-08-28 | 2024-02-06 | 无锡瑞真精机股份有限公司 | Telescopic hydraulic self-centering mechanism |
| CN107542723A (en) * | 2017-10-13 | 2018-01-05 | 烟台未来自动装备有限责任公司 | A kind of nothing changes the single-acting two-stage hydraulic cylinder of level impact |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20111012 |