CN1031730C - Hollow plunger hydraulic cylinder - Google Patents
Hollow plunger hydraulic cylinder Download PDFInfo
- Publication number
- CN1031730C CN1031730C CN 93111586 CN93111586A CN1031730C CN 1031730 C CN1031730 C CN 1031730C CN 93111586 CN93111586 CN 93111586 CN 93111586 A CN93111586 A CN 93111586A CN 1031730 C CN1031730 C CN 1031730C
- Authority
- CN
- China
- Prior art keywords
- plunger
- cylinder body
- cylinder
- hollow
- guide sleeve
- 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
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- Actuator (AREA)
Abstract
The present invention relates to a hydraulic cylinder, particularly to a hollow plunger hydraulic cylinder. When the cylinder is transversally arranged or arranged in inclination, the bending stress of the cylinder is small, the abrasion of a plunger, a sealing ring and a guide sleeve is small, and therefore, the service life of the cylinder can extended, maintenance quantity can be reduced, and running rate can be enhanced. The guide sleeve is arranged in a cylinder body, the hollow plunger is arranged in the guide sleeve, the wall of the back part of the cylinder body is provided with a discharge valve, and the back end of the cylinder body is provided with an oil inlet. The sealing ring is arranged between the plunger and the cylinder body, a press cover is fixedly connected with the front end of the cylinder body, and a dust ring is arranged between a plunger rod head and the press cover. A cylinder body bearing is connected with the cylinder body, the plunger is hollow, and the back end of the plunger is provided with an opening communicated with a cylinder body inner cavity.
Description
The present invention relates to a kind of hydraulic jack, particularly a kind of hollow plunger hydraulic cylinder.
The plunger of existing plunger hydraulic oil cylinder is solid or closed hollow-core construction, during work, the pressure of high pressure oil acts on the breech face of plunger, when oil cylinder laterally or when tilting to install, owing to influences such as matching gaps between plunger deadweight and plunger and the guide sleeve, can produce bigger flexural stress, increased the weight of the wearing and tearing of plunger and guide sleeve, seal ring, increase the amount of maintenance of oil cylinder, influenced working life and running rate.
The design proposal that the purpose of this invention is to provide a kind of hollow plunger hydraulic cylinder, this hollow plunger hydraulic cylinder are laterally or when tilting to install, its flexural stress is little, the wearing and tearing of plunger, seal ring and guide sleeve are less, help increasing the service life, reduce amount of maintenance, improve the normal operation rate.
Specific embodiments of the present invention is: hollow plunger hydraulic cylinder comprises cylinder body, plunger, guide sleeve, seal ring, gland, dust ring, outlet valve and cylinder body supporting, guide sleeve is housed in the cylinder body, plunger is housed in the guide sleeve, outlet valve is arranged on the cylinder wall, rear end of the cylinder block has filler opening, between plunger and cylinder body seal ring is arranged, gland is fixedlyed connected with the cylinder body front end, dust ring places between plunger rod head and the gland, the cylinder body supporting is connected with cylinder body, plunger is hollow, and plunger back-end has opening to communicate with inner chamber of cylinder block.The end surface shape of the axial cross section of hollow plunger after-opening end wall is circular arc or taper, acts on pressure on the plunger after-opening end face so that reduce high pressure oil; Hollow plunger is welded with steel pipe and plunger rod head; In one end of plunger rod head and steel pipe welding depression is arranged,, reach the purpose that reduces hydraulic jack flexural stress laterally or when tilting to install as far as possible so that the main force bearing point of plunger when work moves forward as far as possible.
Major advantage of the present invention is: because the plunger of hydraulic jack is a hollow-core construction, and plunger back-end has opening to communicate with inner chamber of cylinder block, therefore, when high pressure oil when the rear end of the cylinder block oil inlet hole enters inner chamber of cylinder block, enter the plunger inner space simultaneously, most of pressure is acted on the depression in plunger front end and the plunger rod head, small part pressure acts on the circumferential end surfaces of plunger back-end, end surface shape because of the axial cross section of hollow plunger after-opening end wall is circular arc or taper again, so it is stressed littler, when horizontal installation of hydraulic jack or inclination are installed, because the reach of force bearing point, flexural stress is less, plunger, the wearing and tearing of seal ring and guide sleeve are less, help increasing the service life, reduce amount of maintenance, improve the normal operation rate.
The present invention is further described below in conjunction with drawings and Examples:
Accompanying drawing is the hollow plunger hydraulic cylinder configuration diagram.It comprises cylinder body 8, hollow plunger 5, guide sleeve 6, seal ring 4, gland 3, dust ring 2, outlet valve 9 and cylinder body supporting 7 (seeing accompanying drawing), guide sleeve 6 is housed in the cylinder body 8, hollow plunger 5 is housed in the guide sleeve 6, on the wall at cylinder body 8 rear portions outlet valve 9 is arranged, rear end of the cylinder block has covered filler opening 10, rear end cover and cylinder body welding, seal ring 4 is arranged between plunger and cylinder body, gland 3 is screwed with the front end flange limit of cylinder body 8 and is connected, dust ring 2 places between plunger rod head 1 and the gland 3, and cylinder body supporting 7 is connected with cylinder body 8.The hollow plunger rear end has opening to communicate with inner chamber of cylinder block, acts on pressure on the hollow plunger after-opening end face in order to reduce high pressure oil, and hollow plunger after-opening end face is made circular arc or taper; Hollow plunger is welded by steel pipe and plunger rod head.For the main force bearing point that makes plunger when work moves forward as far as possible, reach the purpose that reduces hydraulic jack flexural stress laterally or when tilting to install as far as possible, be processed with depression 11 in the end that plunger rod head and steel pipe weld.
Claims (1)
- Hollow plunger hydraulic cylinder comprises cylinder body, plunger, guide sleeve, seal ring, gland, dust ring, outlet valve and cylinder body supporting, guide sleeve is housed in the cylinder body, plunger is housed in the guide sleeve, outlet valve is arranged on the cylinder wall, rear end of the cylinder block has filler opening, between plunger and cylinder body seal ring is arranged, gland is fixedlyed connected with the cylinder body front end, and dust ring places between plunger rod head and the gland, the cylinder body supporting is connected with cylinder body, plunger is hollow, and plunger back-end has opening to communicate with inner chamber of cylinder block, it is characterized in that:The end surface shape of the axial cross section of A, hollow plunger after-opening end wall is circular arc or taper;B, hollow plunger are welded by steel pipe and plunger rod head;In one end of C, plunger rod head and steel pipe welding depression is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111586 CN1031730C (en) | 1993-07-20 | 1993-07-20 | Hollow plunger hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93111586 CN1031730C (en) | 1993-07-20 | 1993-07-20 | Hollow plunger hydraulic cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1097845A CN1097845A (en) | 1995-01-25 |
| CN1031730C true CN1031730C (en) | 1996-05-01 |
Family
ID=4989353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93111586 Expired - Fee Related CN1031730C (en) | 1993-07-20 | 1993-07-20 | Hollow plunger hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031730C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434530A (en) * | 2011-12-05 | 2012-05-02 | 韶关液压件厂有限公司 | Differential-type plunger composite oil cylinder |
| CN102991494A (en) * | 2012-10-17 | 2013-03-27 | 江金华 | Plunger type double-rubber cap air-braking wheel cylinder assembly |
| CN103307055A (en) * | 2013-06-26 | 2013-09-18 | 亚星（镇江）系泊链有限公司 | Horizontal plunger piston oil cylinder |
| CN105156398A (en) * | 2015-08-25 | 2015-12-16 | 中国铝业股份有限公司 | Single-action plunger type large hydraulic cylinder capable of being maintained quickly |
-
1993
- 1993-07-20 CN CN 93111586 patent/CN1031730C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1097845A (en) | 1995-01-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |