CN2291531Y - Leakproof hydraulic damper - Google Patents
Leakproof hydraulic damper Download PDFInfo
- Publication number
- CN2291531Y CN2291531Y CN 97237233 CN97237233U CN2291531Y CN 2291531 Y CN2291531 Y CN 2291531Y CN 97237233 CN97237233 CN 97237233 CN 97237233 U CN97237233 U CN 97237233U CN 2291531 Y CN2291531 Y CN 2291531Y
- Authority
- CN
- China
- Prior art keywords
- piston rod
- hydraulic damper
- leakproof
- damper
- inner core
- 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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- Fluid-Damping Devices (AREA)
Abstract
The utility model relates to a leakproof hydraulic damper, which is a leakproof and adjustable hydraulic damper especially used for body-building apparatus. The leakproof hydraulic damper is mainly composed of an inner cylinder, an outer cylinder, a piston which is provided with one-way valves, overflow members, adjustment rings, seal rings, etc. The overflow element is arranged on the upper edge of the inner cylinder on the end which a piston rod is pulled out; the high pressure oil is firstly depressed via overflow holes on the overflow member and a flow regulation ring, and then enters the outer cylinder to contact with the sealing ring when the damper is worked; the inner side of the seal ring is enabled to be negative pressure, and the outer side is the atmospheric pressure, and the hydraulic oil is prevented from leaking out.
Description
The utility model relates to a kind of hydraulic damper, especially for the leakproof adjustable hydraulic damper of gymnastic apparatus.
Existing hydraulic damper, ubiquity hydraulic oil is along the problem of damper rod to external leakage.The leakage of hydraulic oil has a strong impact on the mechanical property of damper on the one hand, thereby influences the working life of damper, befouling environment on the other hand.
Chinese patent 95243810 discloses a kind of adjustable damper, and during its pistons work, the seal ring direct and along piston rod of the high pressure oil in the damper is connected.Like this, the seal ring inboard be high pressure oil, the outside then for barometric pressure, be difficult to prevent hydraulic oil along the piston rod hole to external leakage.
The purpose of this utility model just provides a kind of hydraulic oil and is difficult for along the hydraulic damper of piston rod hole to external leakage.
For achieving the above object, the utility model has adopted following technological scheme:
Spill piece is contained in the damper inner core along piston rod pull-out direction one end.The overflow hole of inner core on spill piece is connected with urceolus and Sealing.Pull out in the process at piston rod, the high pressure oil in the inner core overflow hole step-down on spill piece earlier is to contact and flow back in the urceolus with Sealing again after the low pressure.
In the utility model damper, because high pressure oil does not directly contact with Sealing; Simultaneously when piston rod is pulled out, be arranged in outer gradually the moving of part piston rod of inner core, piston rod shared volume in inner core reduces gradually, the hydraulic oil that enters inner core from urceolus is greater than the volume of inner core row to the hydraulic oil of urceolus, and an amount of air expansion in the outer tube of this volume differences compensates, and the pressure in the urceolus is reduced to negative pressure gradually like this.Because the Sealing inner chambers is communicated with urceolus, thereby the Sealing inboard is negative pressure, and the outside is a barometric pressure, stoped hydraulic oil along piston rod to external leakage.
The utility model will be further described below in conjunction with accompanying drawing.
Accompanying drawing is the sectional view of the utility model leakproof hydraulic damper.
As seen from the figure, the utility model hydraulic damper comprises urceolus (2), inner core (3), left end cap (15), the piston (1) that has one-way valve, piston rod (4), spill piece (5), Flow-rate adjustment ring (7), drive sleeve (8), right end cap (6), regulating handle (9), seal ring (10), inside and outside tube is connected by check valve assembly (11,12,13,14).Spill piece (5) is contained in inner core (3) upper edge piston rod (4) pull-out direction one end, and Flow-rate adjustment ring (7) is enclosed within on the spill piece (5), in the groove on the projection embedding Flow-rate adjustment ring (7) on the drive sleeve (8).The fastening connection between regulating handle (9) and the drive sleeve (8).
When piston rod (4) drove piston (1) and all enters inner core (3), inner core was full of hydraulic oil in (3), is mainly hydraulic oil and an amount of air in the urceolus (2), and the interior outside pressure basically identical of seal ring (10) this moment can leakage of oil; When piston rod (4) is pulled out in the process, overflow hole and the Flow-rate adjustment ring (7) of the high pressure oil in the inner core (3) by spill piece (5) flows out and enters urceolus, reduces to low pressure.Meanwhile, the low pressure oil in the urceolus (2) enters inner core (3) by check valve assembly (11,12,13,14).Because piston rod (4) shifts out inner core (3) gradually, piston rod (4) shared volume in inner core (3) is just filled by the hydraulic oil in the urceolus (2), and the volume that urceolus (2) hydraulic oil reduces is compensated voluntarily by the air expansion in the urceolus (2).That is to say that when piston rod (4) when being drawn out, outer cylinder pressure reduces gradually, form negative pressure.Because seal ring (10) inner chambers and urceolus spatial communication, when piston rod (4) when pulling out, seal ring (10) inside pressure is lower than atmosphere outside pressure like this, effectively stoped hydraulic oil along piston rod (4) to external leakage.
Claims (2)
1, a kind of leakproof hydraulic damper, it comprises urceolus (2), inner core (3), piston rod (4), has the piston (1) of one-way valve, the spill piece (5) that has overflow hole, Sealing (10), it is characterized in that: spill piece (5) is contained in inner core (3) upper edge piston rod (4) pull-out direction one end; The overflow hole of inner core (3) on spill piece (5) is connected with urceolus (2) and Sealing (10).
2, leakproof hydraulic damper according to claim 1 is characterized in that being between spill piece (5) and the piston rod (4) Spielpassung.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237233 CN2291531Y (en) | 1997-06-20 | 1997-06-20 | Leakproof hydraulic damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237233 CN2291531Y (en) | 1997-06-20 | 1997-06-20 | Leakproof hydraulic damper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2291531Y true CN2291531Y (en) | 1998-09-16 |
Family
ID=33947921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97237233 Expired - Fee Related CN2291531Y (en) | 1997-06-20 | 1997-06-20 | Leakproof hydraulic damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2291531Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402883C (en) * | 2005-01-25 | 2008-07-16 | 杨铭 | No-leakage hydraulic damper |
| CN100460706C (en) * | 2006-04-29 | 2009-02-11 | 杨德君 | Intelligent gas spring |
| CN101287926B (en) * | 2004-10-14 | 2013-01-30 | 坦尼科汽车操作有限公司 | Amplitude controlled orifice valving |
-
1997
- 1997-06-20 CN CN 97237233 patent/CN2291531Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287926B (en) * | 2004-10-14 | 2013-01-30 | 坦尼科汽车操作有限公司 | Amplitude controlled orifice valving |
| CN100402883C (en) * | 2005-01-25 | 2008-07-16 | 杨铭 | No-leakage hydraulic damper |
| CN100460706C (en) * | 2006-04-29 | 2009-02-11 | 杨德君 | Intelligent gas spring |
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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 |