CN202073868U - Two-stage hydraulic cylinder with oil through structure device - Google Patents
Two-stage hydraulic cylinder with oil through structure device Download PDFInfo
- Publication number
- CN202073868U CN202073868U CN2011201676564U CN201120167656U CN202073868U CN 202073868 U CN202073868 U CN 202073868U CN 2011201676564 U CN2011201676564 U CN 2011201676564U CN 201120167656 U CN201120167656 U CN 201120167656U CN 202073868 U CN202073868 U CN 202073868U
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- piston rod
- oil
- stage
- outer sleeve
- inner sleeve
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Abstract
The utility model discloses a two-stage hydraulic cylinder with an oil through structure device, which comprises a primary piston rod and a secondary piston rod. The primary piston rod and the secondary piston rod are connected with each other in a sleeved manner; the gap between an outer sleeve on the primary piston rod and an inner sleeve on the secondary piston rod is 3 millimeters; and at least one circular hole is arranged on each of the outer sleeve and the inner sleeve. As the gap is reserved between the outer sleeve and the inner sleeve and the circular holes are arranged on the outer sleeve and the inner sleeve, hydraulic oil enters the surface of the secondary piston rod from the circular holes to form oil films for preventing damage to the secondary piston rod, efficiency is improved, and the service life of the hydraulic cylinder is prolonged.
Description
Technical field
The utility model relates to a kind of two-stage hydraulic jack, relates in particular to a kind of two-stage hydraulic jack with logical oily constructional device.
Background technique
Oil hydraulic cylinder with hydraulic pressure can change mechanical energy into, the do straight reciprocating motion hydraulic actuator of (or oscillating motion).Its simple in structure, reliable operation.When realizing to-and-fro motion with it, can remove speed reducer from, and not have drive gap, therefore motion steadily is used widely in the hydraulic system of various machineries.The pressure reduction on oil hydraulic cylinder ouput force and piston effective area and both sides thereof is directly proportional; Oil hydraulic cylinder is made up of cylinder barrel and cylinder cap, piston and piston rod, seal arrangement, damping device and venting gas appliance basically.Damping device and venting gas appliance are decided on concrete application, and other devices are then essential.
At present, the two-stage hydraulic jack structure of using always on the market, it is relatively more difficult that hydraulic oil enters the rod chamber of secondary, cause oil cylinder to creep easily or quiver row, perhaps suffocate, make the oil cylinder can't proper functioning or produce noise and abnormal sound during work, and damage the second piston rod plate surface easily, cause the shaft cut.Therefore, be necessary existing two-stage hydraulic jack structure is improved, avoid damaging second piston rod, raise the efficiency.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of two-stage hydraulic jack with logical oily constructional device, improves the oil-feed structure, avoids damaging second piston rod, raises the efficiency and hydraulic jack working life.
The utility model is to solve the problems of the technologies described above the technological scheme that adopts to provide a kind of two-stage hydraulic jack with logical oily constructional device, comprise first stage piston bar and second piston rod that suit links to each other, wherein, outer sleeve and the gap between the inner sleeve on the second piston rod on the described first stage piston bar are 3 millimeters, and described outer sleeve and inner sleeve are provided with at least one circular hole.
The above-mentioned two-stage hydraulic jack with logical oily constructional device, wherein, the number of described circular hole is 4.
The utility model contrast prior art has following beneficial effect: the two-stage hydraulic jack with logical oily constructional device that the utility model provides, by the gap between outer sleeve and the inner sleeve is set, and on outer sleeve and inner sleeve, be provided with at least one circular hole, make hydraulic oil enter the second piston rod surface and form oil film from circular hole, thereby avoid damaging second piston rod, raise the efficiency and hydraulic jack working life.
Description of drawings
Fig. 1 is the two-stage hydraulic jack structural representation that the utlity model has logical oily constructional device;
Fig. 2 is outer sleeve and an inner sleeve structural representation in the utility model two-stage hydraulic jack.
Among the figure:
1 locking block, 2 first stage piston bars, 3 stop collars
4 pistons, 5 cylinder bodies, 6 secondary spacer sleeves
7 one-level guide sleeves, 8 secondary guide sleeves, 9 second piston rods
10 outer sleeves, 11 inner sleeves, 12 circular holes
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Fig. 1 is the two-stage hydraulic jack structural representation that the utlity model has logical oily constructional device; Fig. 2 is outer sleeve and an inner sleeve structural representation in the utility model two-stage hydraulic jack.
See also Fig. 1 and Fig. 2, the two-stage hydraulic jack with logical oily constructional device that the utility model provides comprises cylinder body 5 and piston 4, be provided with first stage piston bar 1 and second piston rod 9 that suit links to each other in the cylinder body 5, wherein, outer sleeve 10 on the described first stage piston bar 1 and the gap between the inner sleeve 11 on the second piston rod 9 are 3 millimeters, and described outer sleeve 10 and inner sleeve 11 are provided with at least one circular hole 12.
As the two-stage hydraulic jack, generally be provided with secondary spacer sleeve 6 between first stage piston bar 1 and the second piston rod 9, first stage piston bar 1 is provided with one-level guide sleeve 7, second piston rod 9 is provided with secondary guide sleeve 8, in addition, the two-stage hydraulic jack generally also is provided with locking block 1 and stop collar 3, describes in detail no longer one by one at this.
The two-stage hydraulic jack working procedure that the utility model provides is as follows: hydraulic oil enters the rod chamber of the cylinder body 5 of multistage hydraulic cylinder by board-like bidirectional balanced valve 11, pass through the hydraulic fluid port of first stage piston bar 2 then, enter 3 millimeters gaps radially between the welding type outer sleeve 10 of first stage piston bar 2 and the inner sleeve 11, circular hole 12 by 4 φ carried out oil, flow to the inner chamber of second piston rod 9, thereby be full of the rod chamber of whole second piston rod 9, make oil cylinder finish contractive action.Help the second level that fluid successfully enters into hydraulic jack like this, oil cylinder is started steadily, can not occur creeping or quivering capable phenomenon; The back that enters of fluid forms oil film on second piston rod 9 surfaces, plays the effect of lubrication protection, avoids second piston rod 9 surfaces to pull, and produces cut, has influenced the working life of oil hydraulic cylinder.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.
Claims (2)
1. one kind has the two-stage hydraulic jack that leads to oily constructional device, comprise first stage piston bar (1) and second piston rod (9) that suit links to each other, it is characterized in that, outer sleeve (10) on the described first stage piston bar (1) and the gap between the inner sleeve (11) on the second piston rod (9) are 3 millimeters, and described outer sleeve (10) and inner sleeve (11) are provided with at least one circular hole (12).
2. the two-stage hydraulic jack with logical oily constructional device as claimed in claim 1 is characterized in that the number of described circular hole (12) is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201676564U CN202073868U (en) | 2011-05-24 | 2011-05-24 | Two-stage hydraulic cylinder with oil through structure device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201676564U CN202073868U (en) | 2011-05-24 | 2011-05-24 | Two-stage hydraulic cylinder with oil through structure device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202073868U true CN202073868U (en) | 2011-12-14 |
Family
ID=45111972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201676564U Expired - Fee Related CN202073868U (en) | 2011-05-24 | 2011-05-24 | Two-stage hydraulic cylinder with oil through structure device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202073868U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015035903A1 (en) * | 2013-09-10 | 2015-03-19 | 三一汽车制造有限公司 | Wobbler mechanism and concrete pumping device |
-
2011
- 2011-05-24 CN CN2011201676564U patent/CN202073868U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015035903A1 (en) * | 2013-09-10 | 2015-03-19 | 三一汽车制造有限公司 | Wobbler mechanism and concrete pumping device |
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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: 20111214 Termination date: 20160524 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |