CN203847477U - Double-acting cylinder for telescopic boom of crane - Google Patents
Double-acting cylinder for telescopic boom of crane Download PDFInfo
- Publication number
- CN203847477U CN203847477U CN201420276883.4U CN201420276883U CN203847477U CN 203847477 U CN203847477 U CN 203847477U CN 201420276883 U CN201420276883 U CN 201420276883U CN 203847477 U CN203847477 U CN 203847477U
- Authority
- CN
- China
- Prior art keywords
- piston rod
- oil duct
- cylinder tube
- sequence valve
- stretch out
- 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
- 230000008602 contraction Effects 0.000 claims description 27
- 239000000945 filler Substances 0.000 claims description 12
- 239000003921 oil Substances 0.000 description 80
- 239000010720 hydraulic oil Substances 0.000 description 8
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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- Jib Cranes (AREA)
Abstract
The utility model relates to a double-acting cylinder for a telescopic boom of a crane. The double-acting cylinder for the telescopic boom of the crane comprises a first cylinder barrel, a first piston rod, a second cylinder barrel and a second piston rod. A first stretching oil channel and a first retracting oil channel are arranged in the first piston rod. An opening of the first retracting oil channel is located at the stretching end of the first piston rod. The other opening of the first retracting oil channel is arranged in the first piston rod and close to a piston. A second sequence valve is arranged outside the portion, close to the stretching and retracting end of the first piston rod, of the first cylinder barrel. A first sequence valve is arranged at the end, far away from the stretching and retracting end of the first piston rod, of the first cylinder barrel. The stretching and retracing end of the second piston rod is connected with the first sequence valve. A second stretching oil channel and a second retracing oil channel are arranged in the second piston rod. An opening of the second retracting oil channel is formed in the stretching end of the second piston rod. The other opening of the retracting oil channel is formed in the second piston rod and close to the piston. The second retracting oil channel and the first oil retracting oil channel are communicated through the second sequence valve. The first stretching oil channel and the second stretching oil channel are communicated through the second sequence valve. The double-acting cylinder for the telescopic boom of the crane has the advantages that the retracting distance is short, and the stretching distance is long.
Description
Technical field
The utility model belongs to field of mechanical technique, is specifically related to a kind of oil cylinder, particularly a kind of crane telescopic boom two-way cylinder.
Background technique
Along with the extensive use of hydraulics, more and more higher to the performance requirement of hydraulic product, more and more higher for the performance requirement of executive component oil hydraulic cylinder.Especially particularly special to the requirement of the hydraulic jack for Microhoist.Because Microhoist is for narrow space, so crane boundary dimension is had to requirement.Require the volume of Microhoist small and exquisite, job area is large, this just requires the telescoping boom of Microhoist short when shrinking, when stretching out, to grow, but, be subject to the restriction of existing oil cylinder, existing telescoping boom can not satisfy the demands, therefore, develop a kind of shrink short, to stretch out long crane telescopic boom very necessary with two-way cylinder.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of shrink short, stretch out long crane telescopic boom two-way cylinder.
The purpose of this utility model is achieved in that
A kind of crane telescopic boom two-way cylinder, comprise cylinder tube one, be arranged on piston rod one in cylinder tube one, be arranged on cylinder tube one by one side cylinder tube two and be arranged on the piston rod two in cylinder tube two, in described piston rod one, be provided with run through piston rod one stretch out oil duct one and with the contraction oil duct one that stretches out oil duct one and parallel, an opening of described contraction oil duct one is opened in piston rod one external part, and another opening that shrinks oil duct one is opened in piston rod one near the position of piston; Arranged outside near the cylinder tube one of piston rod one telescopic end has sequence valve two, away from the end of the cylinder tube one of piston rod one telescopic end, is provided with sequence valve one; The telescopic end of described piston rod two is connected with sequence valve one, in described piston rod two, be provided with run through piston rod two stretch out oil duct two and with the contraction oil duct two that stretches out oil duct two and parallel, an opening of described contraction oil duct two is opened in piston rod two external parts, and another opening that shrinks oil duct two is opened in piston rod two near the position of piston; Described contraction oil duct two and shrink oil duct one and stretch out oil duct two and stretch out between oil duct one and be all connected by sequence valve two.
The telescopic end of described piston rod one is provided with oil circuit joint, on described oil circuit joint, be provided with stretch out filler opening one that oil duct one is communicated with and with the filler opening two that stretches out oil duct two and be communicated with.
End away from the cylinder tube two of piston rod two telescopic ends is provided with the gib head matching with sequence valve one.
The utlity model has following positive effect: the utility model by cylinder tube one, piston rod one, cylinder tube two, piston rod two, stretch out oil duct one, stretch out oil duct two, shrink oil circuit one, the cooperation of shrinking oil circuit two, sequence valve one and sequence valve two realizes double-acting bi-directional expansion, and then realize short and small when shrinking, to stretch out duration feature, and then can realize in use the demand of Microhoist telescopic boom, have advantages of shrink short, stretch out long.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the contraction state of two-way cylinder for a kind of crane telescopic boom of the utility model.
Fig. 2 is the structural drawing of the state that stretches out of two-way cylinder for a kind of crane telescopic boom of the utility model.
In figure: 1, cylinder tube 1, piston rod 1, stretch out oil duct 1, shrink oil duct 1, sequence valve 1, sequence valve 27, cylinder tube 28, piston rod 29, shrink oil duct 2 10, stretch out oil duct 2 11, oil circuit joint 12, filler opening 1, filler opening two.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further.
Embodiment 1
As depicted in figs. 1 and 2, a kind of crane telescopic boom two-way cylinder, comprise cylinder tube 1, be arranged on piston rod 1 in cylinder tube 1, be arranged on the cylinder tube 27 of cylinder tube one 1 one sides and be arranged on the piston rod 28 in cylinder tube 27, in described piston rod 1, be provided with run through piston rod 1 stretch out oil duct 1 and with the contraction oil duct 1 that stretches out oil duct 1 and parallel, an opening of described contraction oil duct 1 is opened in piston rod one 2 external parts, and another opening that shrinks oil duct 1 is opened in piston rod 1 near the position of piston; Arranged outside near the cylinder tube 1 of piston rod one 2 telescopic ends has sequence valve 26, away from the end of the cylinder tube 1 of piston rod one 2 telescopic ends, is provided with sequence valve 1; The telescopic end of described piston rod 28 is connected with sequence valve 1, in described piston rod 28, be provided with run through piston rod 28 stretch out oil duct 2 10 and with the contraction oil duct 29 that stretches out oil duct 2 10 and parallel, an opening of described contraction oil duct 29 is opened in piston rod 28 external parts, and another opening that shrinks oil duct 29 is opened in piston rod 28 near the position of piston; Described contraction oil duct 29 and shrink oil duct 1 and stretch out oil duct 2 10 and stretch out between oil duct 1 and be all connected by sequence valve 26.
The utility model in use, when filler opening one oil-feed, hydraulic oil enters cylinder tube one by stretching out oil duct one, and then promote cylinder tube two, sequence valve two, sequence valve one, cylinder tube and play one by one motion, when cylinder tube one moves to the limit position relative with piston rod one, sequence valve two is opened, and hydraulic oil enters in cylinder tube one by stretching out oil duct two, and promote cylinder tube one and piston rod one relative movement until limit position completes and stretches out.When filler opening two oil-feed, the logical contraction of hydraulic oil oil duct two, sequence valve two, contraction oil duct one enter in cylinder tube two, promoting piston rod two retracts, when piston rod two is retracted into after limit position, opening sequence valve one, hydraulic oil enters cylinder tube one from shrinking oil duct one, promotes piston rod one and retracts until limit position completes contraction.
The utility model by cylinder tube one, piston rod one, cylinder tube two, piston rod two, stretch out oil duct one, stretch out oil duct two, shrink oil circuit one, the cooperation of shrinking oil circuit two, sequence valve one and sequence valve two realizes double-acting bi-directional expansion, and then realize short and small when shrinking, to stretch out duration feature, and then can realize in use the demand of Microhoist telescopic boom, have advantages of shrink short, stretch out long.
Embodiment 2
As depicted in figs. 1 and 2, a kind of crane telescopic boom two-way cylinder, comprise cylinder tube 1, be arranged on piston rod 1 in cylinder tube 1, be arranged on the cylinder tube 27 of cylinder tube one 1 one sides and be arranged on the piston rod 28 in cylinder tube 27, in described piston rod 1, be provided with run through piston rod 1 stretch out oil duct 1 and with the contraction oil duct 1 that stretches out oil duct 1 and parallel, an opening of described contraction oil duct 1 is opened in piston rod one 2 external parts, and another opening that shrinks oil duct 1 is opened in piston rod 1 near the position of piston; Arranged outside near the cylinder tube 1 of piston rod one 2 telescopic ends has sequence valve 26, away from the end of the cylinder tube 1 of piston rod one 2 telescopic ends, is provided with sequence valve 1; The telescopic end of described piston rod 28 is connected with sequence valve 1, in described piston rod 28, be provided with run through piston rod 28 stretch out oil duct 2 10 and with the contraction oil duct 29 that stretches out oil duct 2 10 and parallel, an opening of described contraction oil duct 29 is opened in piston rod 28 external parts, and another opening that shrinks oil duct 29 is opened in piston rod 28 near the position of piston; Described contraction oil duct 29 and shrink oil duct 1 and stretch out oil duct 2 10 and stretch out between oil duct 1 and be all connected by sequence valve 26.The telescopic end of described piston rod 1 is provided with oil circuit joint 11, on described oil circuit joint 11, be provided with stretch out filler opening 1 that oil duct 1 is communicated with and with the filler opening 2 13 that stretches out oil duct 2 10 and be communicated with.End away from the cylinder tube 27 of piston rod 28 telescopic ends is provided with the gib head matching with sequence valve 1.
The utility model in use, when filler opening one oil-feed, hydraulic oil enters cylinder tube one by stretching out oil duct one, and then promote cylinder tube two, sequence valve two, sequence valve one, cylinder tube and play one by one motion, when cylinder tube one moves to the limit position relative with piston rod one, sequence valve two is opened, and hydraulic oil enters in cylinder tube one by stretching out oil duct two, and promote cylinder tube one and piston rod one relative movement until limit position completes and stretches out.When filler opening two oil-feed, the logical contraction of hydraulic oil oil duct two, sequence valve two, contraction oil duct one enter in cylinder tube two, promoting piston rod two retracts, when piston rod two is retracted into after limit position, opening sequence valve one, hydraulic oil enters cylinder tube one from shrinking oil duct one, promotes piston rod one and retracts until limit position completes contraction.
The utility model by cylinder tube one, piston rod one, cylinder tube two, piston rod two, stretch out oil duct one, stretch out oil duct two, shrink oil circuit one, the cooperation of shrinking oil circuit two, sequence valve one and sequence valve two realizes double-acting bi-directional expansion, and then realize short and small when shrinking, to stretch out duration feature, and then can realize in use the demand of Microhoist telescopic boom, have advantages of shrink short, stretch out long.
Claims (3)
1. a crane telescopic boom two-way cylinder, comprise cylinder tube one, be arranged on piston rod one in cylinder tube one, be arranged on cylinder tube one by one side cylinder tube two and be arranged on the piston rod two in cylinder tube two, it is characterized in that: in described piston rod one, be provided with run through piston rod one stretch out oil duct one and with the contraction oil duct one that stretches out oil duct one and parallel, an opening of described contraction oil duct one is opened in piston rod one external part, and another opening that shrinks oil duct one is opened in piston rod one near the position of piston; Arranged outside near the cylinder tube one of piston rod one telescopic end has sequence valve two, away from the end of the cylinder tube one of piston rod one telescopic end, is provided with sequence valve one; The telescopic end of described piston rod two is connected with sequence valve one, in described piston rod two, be provided with run through piston rod two stretch out oil duct two and with the contraction oil duct two that stretches out oil duct two and parallel, an opening of described contraction oil duct two is opened in piston rod two external parts, and another opening that shrinks oil duct two is opened in piston rod two near the position of piston; Described contraction oil duct two and shrink oil duct one and stretch out oil duct two and stretch out between oil duct one and be all connected by sequence valve two.
2. according to the crane telescopic boom two-way cylinder described in one kind of claim 1, it is characterized in that: the telescopic end of described piston rod one is provided with oil circuit joint, on described oil circuit joint, be provided with stretch out filler opening one that oil duct one is communicated with and with the filler opening two that stretches out oil duct two and be communicated with.
3. according to the crane telescopic boom two-way cylinder described in one kind of claim 1, it is characterized in that: the end away from the cylinder tube two of piston rod two telescopic ends is provided with the gib head matching with sequence valve one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420276883.4U CN203847477U (en) | 2014-05-22 | 2014-05-22 | Double-acting cylinder for telescopic boom of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420276883.4U CN203847477U (en) | 2014-05-22 | 2014-05-22 | Double-acting cylinder for telescopic boom of crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203847477U true CN203847477U (en) | 2014-09-24 |
Family
ID=51560502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420276883.4U Expired - Fee Related CN203847477U (en) | 2014-05-22 | 2014-05-22 | Double-acting cylinder for telescopic boom of crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203847477U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465097A (en) * | 2015-12-23 | 2016-04-06 | 北汽福田汽车股份有限公司 | Engineering machine and multilevel telescopic mechanism thereof and piston assembly |
| CN105864134A (en) * | 2016-04-22 | 2016-08-17 | 三帕尔菲格特种车辆装备有限公司 | Multi-oil-cylinder sequential telescopic system and crane |
| CN110296123A (en) * | 2019-07-26 | 2019-10-01 | 娄底市中兴液压件有限公司 | Oil cylinder, serial oil cylinders and engineering truck |
| CN112938790A (en) * | 2021-01-27 | 2021-06-11 | 江苏正峰液压科技有限公司 | Hydraulic driving device for telescopic arm of crane |
-
2014
- 2014-05-22 CN CN201420276883.4U patent/CN203847477U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465097A (en) * | 2015-12-23 | 2016-04-06 | 北汽福田汽车股份有限公司 | Engineering machine and multilevel telescopic mechanism thereof and piston assembly |
| CN105864134A (en) * | 2016-04-22 | 2016-08-17 | 三帕尔菲格特种车辆装备有限公司 | Multi-oil-cylinder sequential telescopic system and crane |
| CN110296123A (en) * | 2019-07-26 | 2019-10-01 | 娄底市中兴液压件有限公司 | Oil cylinder, serial oil cylinders and engineering truck |
| CN110296123B (en) * | 2019-07-26 | 2024-02-27 | 娄底市中兴液压件有限公司 | Oil cylinder, series oil cylinder and engineering vehicle |
| CN112938790A (en) * | 2021-01-27 | 2021-06-11 | 江苏正峰液压科技有限公司 | Hydraulic driving device for telescopic arm of crane |
| CN112938790B (en) * | 2021-01-27 | 2023-06-13 | 江苏正峰液压科技有限公司 | Hydraulic driving device for telescopic boom of crane |
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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: 20140924 |