CN2246205Y - Long range self-resetting hydrautic oil cylinder - Google Patents
Long range self-resetting hydrautic oil cylinder Download PDFInfo
- Publication number
- CN2246205Y CN2246205Y CN 95246775 CN95246775U CN2246205Y CN 2246205 Y CN2246205 Y CN 2246205Y CN 95246775 CN95246775 CN 95246775 CN 95246775 U CN95246775 U CN 95246775U CN 2246205 Y CN2246205 Y CN 2246205Y
- Authority
- CN
- China
- Prior art keywords
- plunger
- extension spring
- cylinder body
- cavity
- jacking block
- 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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Abstract
The utility model relates to a long travel automatic resetting hydraulic oil cylinder, a plunger piston of the utility model is provided with a cylinder-shaped inner cavity, and two springs which are provided with same axial leads and are sheathed with each other are arranged in the inner cavity of the plunger piston; in the operation travel of the plunger piston, a pressing spring is gradually compressed, and a tension spring is gradually extended; the operation travel is the sum of the compressed length of the pressing spring and the extended length of the tension spring, and when the operation travel is completed and oil is returned, the plunger piston is reset via the comprehensive function of the tension spring and the pressing spring; the operation travel space provided by the inner cavity of the cylinder body of the utility model is completely used, and the utility model is especially suitable for the places where need long operation travel.
Description
The utility model relates to a kind of hydraulic element, and particularly a kind of long stroke is from resetting hydraulic jack.
Usually must not give the piston rod cover compression spring of oil cylinder by the hydraulic jack that resets certainly of gravity, working stroke equals the stage clip pressurized and the length that shortens; When working stroke finished, stage clip restores the elastic force that produces resetted oil cylinder.This way has taken the stroke space that inner chamber of cylinder block provided because of the existence of stage clip, make working stroke shorten dramatically, another kind of way is to adopt piston type cylinder and plunger to have inner chamber, an extension spring is installed in the inner chamber, fixedly connected with the plunger cavity bottom with the inner chamber of cylinder block bottom respectively in the two ends of extension spring, extension spring is elongated in the working stroke, working stroke equal extension spring stressed and the elongation length, utilizing extension spring to restore the pulling force that produces when working stroke finishes resets oil cylinder, because the elongation of extension spring in elastic limit is limited after all, thereby working stroke still is greatly affected.
The purpose of this utility model will provide a kind of long stroke from resetting hydraulic jack exactly, and it utilizes spring force from resetting and not shortening working stroke because of the existence of spring, and the working stroke space that inner chamber of cylinder block is provided all obtains utilizing.
The purpose of this utility model is to realize like this, long stroke is from resetting hydraulic jack, it includes cylinder body, plunger, prevent the Sealing that leakage of oil is used, described plunger has cylindrical cavity, the opening end of this plunger cavity faces the bottom of inner chamber of cylinder block, the opening end of described plunger cavity also is fastened with an annular cover plate, center in the inner chamber of cylinder block bottom is fastened with a stanchion, in plunger cavity, also has a ring jacking block that can slide along the axial direction of plunger cavity, also be provided with two springs that have same shaft axis and be nested together in the plunger cavity, its skin is a stage clip, nexine is extension spring, the both ends of the surface of stage clip form with jacking block with the annular cover plate of plunger respectively and contact, and the two ends of extension spring form a fixed connection with jacking block and stanchion respectively.
The utility model is owing to held a stage clip and an extension spring in the cylindrical cavity of plunger, do not take the stroke space in the inner chamber of cylinder block, working stroke is that stage clip is compressed length and extension spring by the extended length sum, thereby oil cylinder of the present utility model is only adorned the oil cylinder of a stage clip or extension spring than same Dimensions, working stroke nearly doubles, the working stroke space that inner chamber of cylinder block provided has all obtained utilization, the working stroke comprehensive function that can rely on stage clip and extension spring that finishes realizes resetting fully, and the utility model needing to be particularly useful for the farm labourer to make the situation of stroke.Because plunger can be made thicker external diameter, do also to be unlikely under the load distortion in addition at heavy industry.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is the vertical cross-sectional schematic of long stroke of the present utility model when the hydraulic jack that resets is in reset mode.
Fig. 2 is that long stroke shown in Figure 1 is from resetting vertical cross-sectional schematic of hydraulic jack when working stroke reaches maximum.
Referring to Fig. 1, the inner chamber of cylinder body (1) is that cylindrical its opening end is provided with internal thread, the lining of ring (15) has corresponding outside thread and is tightened on the opening end of cylinder body (1) inner chamber, the bottom of cylinder body (1) inner chamber is provided with oilhole (13), plunger (2) also for cylindrical and and the formation of the endoporus of lining (15) be slidingly matched; Plunger (2) has cylindrical cavity, and this plunger cavity (4) has same axis with plunger (2), and the opening end of plunger cavity (4) faces the bottom of cylinder body (1) inner chamber; Prevent that Sealing (3) that leakage of oil is used is fixed on the external cylindrical surface of plunger (2) and forms tight the contact with the internal chamber wall of cylinder body (1), the left side of Sealing (3) is back-up ring (10), the right side is lining ring (11), the right side of lining ring (11) is baffle ring (12), they all are enclosed within on the external cylindrical surface of plunger (2) with means of fixation, and near the opening end of plunger cavity (4), and back-up ring (10), Sealing (3), lining ring (11), baffle ring (12), be close to arrangement in proper order according to the direction of plunger (2) working stroke.The opening end of plunger cavity (4) also is provided with internal thread and has screwed one and has corresponding externally threaded annular cover plate (5), cylinder body (1) intracavity bottom center with a screw (14) fastening a stanchion (6), the one ring jacking block (7) that can slide along the axial direction of plunger cavity (4) is arranged in the plunger cavity (4), also be provided with two springs that have same shaft axis and be nested together in the plunger cavity (4), it is outer to be that stage clip (8) internal layer is extension spring (9), the both ends of the surface of stage clip (8) contact with annular cover plate (5) and jacking block (7) respectively, the outer cylinder of stanchion (6) has and the corresponding external spiral groove of extension spring (9) section of steel wire shape, the endoporus of jacking block (7) has and the corresponding inner spiral groove of extension spring (9) section of steel wire shape, the two ends of extension spring (9) respectively have some circle steel wires to be entrenched in the spiral chute of stanchion (6) and jacking block (7) respectively, thereby realize extension spring (9) two ends respectively with the fixedlying connected of stanchion (6) and jacking block (7), the axis of the shaft axis of two springs and plunger cavity (4) coincides, it is more smaller than the diameter of plunger cavity (4) to be in its external diameter of outer field stage clip (8), plunger cavity (4) is reached by compression at stage clip (8) play good leading role when restoring, when oil cylinder was in reset mode, two springs approached the length of plunger cavity (4) together with the shared length of jacking block (7).
Referring to Fig. 2, when oil cylinder is in running order, high pressure oil enters the inner chamber of cylinder body (1) from oilhole (13), enter plunger cavity (4) again, promote plunger (2) forward, the annular cover plate (5) that tightens together with plunger (2) just promotes stage clip (8), because jacking block (7) has been held in extension spring (9), both shorten under extruding so stage clip (8) is at jacking block (7) and annular cover plate (5), and the reaction force of this compression makes extension spring (9) elongation, at this moment stage clip (8) pressurized and the length that shortens and extension spring (9) are stressed and length sum elongation just equals the length of working stroke reality, the compressed length of stage clip when working stroke reaches maximum (8) also all reaches maximum respectively with the length that extension spring (9) is extended.When working stroke finishes oil return, plunger (2) no longer is subjected to just withdrawal of oil pressure, stage clip (8) is loosened, the suffered stage clip reaction force of jacking block (7) also reduces, so extension spring (9) also reduces elongation, the process that plunger (2) resets is exactly that stage clip (8) elongation recovers the process that raw footage extension spring (9) shortening recovers raw footage gradually gradually, up to resetting fully.
Claims (3)
1. a long stroke is from resetting hydraulic jack, it includes cylinder body (1), plunger (2), prevents the Sealing (3) that leakage of oil is used, it is characterized in that plunger (2) has cylindrical cavity, the opening end of this plunger cavity (4) faces the bottom of cylinder body (1) inner chamber, the opening end of described plunger cavity (4) also is fastened with an annular cover plate (5), center at cylinder body (1) intracavity bottom is fastened with a stanchion (6), also has a ring jacking block (7) that can slide along the axial direction of plunger cavity (4) in plunger cavity (4); Also be provided with two springs that have same shaft axis and be nested together in the plunger cavity (4), its skin is stage clip (8), and nexine is extension spring (9); The both ends of the surface of stage clip (8) form with pre-piece (7) with the annular cover plate (5) of plunger (2) respectively and contact, and the two ends of extension spring (9) form a fixed connection with jacking block (7) and stanchion (6) respectively.
2. long stroke according to claim 1 is from resetting hydraulic jack, it is characterized in that cylinder body (1) has its opening end of cylindrical cavity and is provided with internal thread, and screwed one and had corresponding externally threaded ring lining (15), plunger (2) cylindrical and and the endoporus of lining (15) form and be slidingly matched; Bottom at cylinder body (1) inner chamber is provided with oilhole (13); With the external cylindrical surface of the contiguous plunger (2) of the opening end of plunger cavity (4) on, be close in proper order by the working stroke direction of plunger (2) and be fixed with back-up ring (10), Sealing (3), lining ring (11), baffle ring (12); The Sealing (3) that is fixed on the external cylindrical surface of plunger (2) forms tight the contact with the internal chamber wall of cylinder body (1).
3. long stroke according to claim 1 and 2 is from resetting hydraulic jack, the outer cylinder that it is characterized in that stanchion (6) has and the corresponding external spiral groove of extension spring (9) section of steel wire shape, and the endoporus of jacking block (7) has and the corresponding inner spiral groove of extension spring (9) section of steel wire shape; The two ends of extension spring (9) respectively have some circle steel wires to form a fixed connection with stanchion (6) and jacking block (7) respectively in chimeric mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95246775 CN2246205Y (en) | 1995-12-29 | 1995-12-29 | Long range self-resetting hydrautic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95246775 CN2246205Y (en) | 1995-12-29 | 1995-12-29 | Long range self-resetting hydrautic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2246205Y true CN2246205Y (en) | 1997-01-29 |
Family
ID=33886301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95246775 Expired - Fee Related CN2246205Y (en) | 1995-12-29 | 1995-12-29 | Long range self-resetting hydrautic oil cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2246205Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889267A (en) * | 2012-11-16 | 2013-01-23 | 江阴市洪腾机械有限公司 | Self-restoration single-action type hydraulic cylinder |
| CN102979781A (en) * | 2012-11-27 | 2013-03-20 | 裕东（中山）机械工程有限公司 | Single-acting plunger-type cylinder |
| CN107906076A (en) * | 2017-12-28 | 2018-04-13 | 中国铁道科学研究院铁道科学技术研究发展中心 | A kind of heavy load and the compression spring self-resetting oil cylinder and assembly technology in limited lifting space |
| CN109424681A (en) * | 2017-09-01 | 2019-03-05 | 实用动力集团 | Mixing spring for hydraulic cylinder |
-
1995
- 1995-12-29 CN CN 95246775 patent/CN2246205Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102889267A (en) * | 2012-11-16 | 2013-01-23 | 江阴市洪腾机械有限公司 | Self-restoration single-action type hydraulic cylinder |
| CN102979781A (en) * | 2012-11-27 | 2013-03-20 | 裕东（中山）机械工程有限公司 | Single-acting plunger-type cylinder |
| CN109424681A (en) * | 2017-09-01 | 2019-03-05 | 实用动力集团 | Mixing spring for hydraulic cylinder |
| EP3450772A1 (en) * | 2017-09-01 | 2019-03-06 | Actuant Corporation | Hybrid spring for a hydraulic cylinder |
| US20190072117A1 (en) * | 2017-09-01 | 2019-03-07 | Actuant Corporation | Hybrid spring for a hydraulic cylinder |
| US10760598B2 (en) * | 2017-09-01 | 2020-09-01 | Enerpac Tool Group Corp. | Hybrid spring for a hydraulic cylinder |
| CN109424681B (en) * | 2017-09-01 | 2021-11-09 | 实用动力集团 | Hybrid spring for hydraulic cylinder |
| CN107906076A (en) * | 2017-12-28 | 2018-04-13 | 中国铁道科学研究院铁道科学技术研究发展中心 | A kind of heavy load and the compression spring self-resetting oil cylinder and assembly technology in limited lifting space |
| CN107906076B (en) * | 2017-12-28 | 2023-09-19 | 中国铁道科学研究院铁道科学技术研究发展中心 | Pressure spring self-resetting oil cylinder with heavy load and limited lifting space and assembly process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 |