CN1207461A - Self-locking fluid driven cylinder-carrying out locking by connecting lead screw to between piston and cylinder body - Google Patents
Self-locking fluid driven cylinder-carrying out locking by connecting lead screw to between piston and cylinder body Download PDFInfo
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- CN1207461A CN1207461A CN 97115065 CN97115065A CN1207461A CN 1207461 A CN1207461 A CN 1207461A CN 97115065 CN97115065 CN 97115065 CN 97115065 A CN97115065 A CN 97115065A CN 1207461 A CN1207461 A CN 1207461A
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Abstract
A self-locking fluid driven cylinder may be oil or gas cylinder, which is different from an ordinary cylinder in that a leading screw arranged in inner cavity of the cylinder and a piston constitute a non-self-locking screw set, a rotation damper is mounted to end of the leading screw, and the piston and piston rod form a slide friction set. On self-locking, the load force on piston rod is transferred via the leading screw to the cylinder body and generates a damping moment between the piston and piston rod to prevent relative movement between them. On unlocking, pressure fluid drives the piston to rotate around the leading screw and the piston rod does linear motion.
Description
The present invention relates to the mechanical caging that the piston rod of fluid driven cylinder is gone up at an arbitrary position.
In the prior art, the mechanical caging that the piston rod of fluid driven cylinder is gone up at an arbitrary position mainly adopts modes such as telescopic locking, the locking of brake chip, internal expansion type locking to realize at present." research of oil hydraulic cylinder mechanical caging problem " has introduced the various implementations of oil hydraulic cylinder mechanical self-latching.The principle of above-mentioned all kinds of mode all is to make and produce frictional force between itself and cylinder body and reach self-locking applying the power of holding tightly on the piston of fluid driven cylinder or the piston rod.Its major defect: the one, the power of holding tightly is limited, and self-locking destroys when the piston rod thrust load surpasses frictional force; The 2nd, accuracy of manufacturing requires high, complex manufacturing.
Task of the present invention provides a kind of energy positive lock and realizes the technological scheme of the self-locking fluid driven cylinder easy, that cost of production is low.
The present invention will be described in detail below in conjunction with accompanying drawing.
Accompanying drawing is a self-locking fluid driven cylinder structural representation.Self-locking fluid drives cylinder structure mainly is made up of cylinder body 1, leading screw 2, piston 3, piston rod 4, resistance swing arm 5 etc.It and the ordinary cylinder main distinction are: inner chamber of cylinder block connects firmly a rhizoid thick stick, and leading screw and piston constitute non-self-locking spiral and pay; A resistance swing arm is installed in the leading screw end, and the piston rod endoporus is offered the resistance spin slot, and the swing arm apply piston bar that is obstructed can not rotate; Piston can rotate relative to piston rod, constitutes sliding friction and pays; Leading screw and cylinder body can not relative movement.
During self-locking, fluid driven cylinder A, B two cavity pressures are zero.The load force F that acts on the piston rod is delivered on the leading screw by piston, produces running torque M on spiral is paid, and makes piston produce rotation trend, piston with the piston rod surface of contact on produce rotational resistance square Mf.Design suitable parameter and make M ≯ Mf, then piston can not rotate and move, and realizes self-locking.
When unblanking, the piston rod movement direction can be divided into four kinds of operating modes according to the load action direction and when unblanking.
1, fluid driven cylinder load by compression, piston rod stretches out.Pressure fluid enters fluid driven cylinder A chamber, the p effect that is stressed simultaneously of piston and piston rod A chamber one side plane.Positive pressure reduces between piston and piston rod, and the resisting moment Mf of Chan Shenging reduces between the two, and the piston that makes that produces between piston and leading screw increases to the running torque M of B cavity direction motion.When hydrodynamic pressure p reaches certain value, M＞Mf, relative leading screw of piston and piston rod rotation drive piston rod and stretch out;
2, fluid driven cylinder load by compression, the piston rod withdrawal.Pressure fluid enters fluid driven cylinder B chamber, the p effect that is stressed simultaneously of piston and piston rod B chamber one side plane.Positive pressure increases between piston and piston rod, and the resisting moment Mf that produces increases between the two, and simultaneously, the piston that makes that produces between piston and leading screw also increases to the running torque M of A cavity direction motion, and the latter increases more than the former.When hydrodynamic pressure p reaches certain value, M＞Mf, relative leading screw of piston and piston rod rotation drive the piston rod withdrawal;
3, fluid driven cylinder is subjected to tension load, and piston rod stretches out.Pressure fluid enters fluid driven cylinder A chamber, the p effect that is stressed simultaneously of piston and piston rod A chamber one side plane.Positive pressure increases between piston and piston rod, and the resisting moment Mf that produces increases between the two, and simultaneously, the piston that makes that produces between piston and leading screw also increases to the running torque M of B cavity direction motion, and the latter increases more than the former.When hydrodynamic pressure p reaches certain value, M＞Mf, relative leading screw of piston and piston rod rotation drive piston rod and stretch out;
4, fluid driven cylinder is subjected to tension load, the piston rod withdrawal.Pressure fluid enters fluid driven cylinder B chamber, the p effect that is stressed simultaneously of piston and piston rod B chamber one side plane.Positive pressure reduces between piston and piston rod, and the resisting moment Mf of Chan Shenging reduces between the two, and the piston that makes that produces between piston and leading screw increases to the running torque M of A cavity direction motion.When hydrodynamic pressure p reaches certain value, M＞Mf, relative leading screw of piston and piston rod rotation drive the piston rod withdrawal.
Claims (5)
1, the self-locking fluid driven cylinder when locking piston rod on thrust load pay by spiral and all mechanically be delivered on the cylinder body, realize locking by frictional force between piston rod, piston and cylinder body three.When unblanking, high-pressure liquid, the relative cylinder body moving linearly of piston rod are injected in the chamber to unblanking.The invention is characterized in: during self-locking, thrust load is paid by spiral and is delivered on the cylinder body on the piston rod, produces friction torque at piston rod and piston space simultaneously, realizes self-locking; When unblanking, inject high-pressure liquid to the chamber of unblanking, spiral is paid the driving moment of generation greater than piston rod and piston space friction torque, and the piston wire winding rod rotates, and drives the piston rod moving linearly simultaneously.
2, described according to claim 1, the spiral that screw mandrel and piston constitute is paid and is non-self-locking spiral.
3, described according to claim 1, piston can rotate around the cylinder body central axis.
4, described according to claim 1, the piston rod endoporus is offered the resistance spin slot, and a resistance swing arm is installed between leading screw and piston rod, guarantees piston rod leading screw moving linearly relatively, and can not rotate.
5, described according to claim 1, the flowing medium that fluid driven cylinder uses can be a liquid, also can be gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97115065A CN1089404C (en) | 1997-08-01 | 1997-08-01 | Self-locking fluid driven cylinder-carrying out locking by connecting lead screw to between piston and cylinder body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97115065A CN1089404C (en) | 1997-08-01 | 1997-08-01 | Self-locking fluid driven cylinder-carrying out locking by connecting lead screw to between piston and cylinder body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1207461A true CN1207461A (en) | 1999-02-10 |
| CN1089404C CN1089404C (en) | 2002-08-21 |
Family
ID=5173091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97115065A Expired - Fee Related CN1089404C (en) | 1997-08-01 | 1997-08-01 | Self-locking fluid driven cylinder-carrying out locking by connecting lead screw to between piston and cylinder body |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1089404C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451568C (en) * | 2000-03-07 | 2009-01-14 | 松下电器产业株式会社 | Liquid discharging apparatus and liquid discharging method |
| CN113915351A (en) * | 2021-10-29 | 2022-01-11 | 闫皓男 | Eccentric butterfly valve |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4780064A (en) * | 1986-02-10 | 1988-10-25 | Flow Industries, Inc. | Pump assembly and its method of operation |
| CN1033287C (en) * | 1992-05-21 | 1996-11-13 | 北京市西城区新开通用试验厂 | High rpessure plug pump with digit control electric motor |
| JP2687822B2 (en) * | 1992-08-06 | 1997-12-08 | ダイキン工業株式会社 | Fluid pressure generator |
| CN2146621Y (en) * | 1992-10-15 | 1993-11-17 | 建设部长沙建筑机械研究所 | Hydraulic control butterfly valve |
| US5364237A (en) * | 1993-05-20 | 1994-11-15 | General Motors Corporation | Compressor assembly having a clutch triggered by a small compressor and actuated by discharge pressure |
| JP3486251B2 (en) * | 1995-03-22 | 2004-01-13 | 塩野義製薬株式会社 | Feeding device using cylinder pump |
-
1997
- 1997-08-01 CN CN97115065A patent/CN1089404C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100451568C (en) * | 2000-03-07 | 2009-01-14 | 松下电器产业株式会社 | Liquid discharging apparatus and liquid discharging method |
| CN113915351A (en) * | 2021-10-29 | 2022-01-11 | 闫皓男 | Eccentric butterfly valve |
| CN113915351B (en) * | 2021-10-29 | 2023-03-28 | 安徽省白湖阀门厂有限责任公司 | Eccentric butterfly valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1089404C (en) | 2002-08-21 |
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