CN104319195A - An oil damper and a breaker actuator using the oil damper - Google Patents
An oil damper and a breaker actuator using the oil damper Download PDFInfo
- Publication number
- CN104319195A CN104319195A CN201410296494.2A CN201410296494A CN104319195A CN 104319195 A CN104319195 A CN 104319195A CN 201410296494 A CN201410296494 A CN 201410296494A CN 104319195 A CN104319195 A CN 104319195A
- Authority
- CN
- China
- Prior art keywords
- piston
- radial direction
- aperture
- piston rod
- inner casing
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
- H01H3/605—Mechanical arrangements for preventing or damping vibration or shock making use of a fluid damper
Abstract
The invention relates to an oil damper and a breaker actuator using the oil damper. The oil damper comprises an inner cylinder, a piston which is arranged in an internal cavity of the inner cylinder, a piston rod which is arranged on the piston, and an outer cylinder which sleeves the periphery of the inner cylinder, wherein an annular gap is reserved between the inner cylinder and the outer cylinder; the cylinder body of the inner cylinder is provided with a front radial oilhole and a rear radial oilhole which communicate the internal cavity of the inner cylinder with the annular gap; the piston has a sliding fit section which forms a guided sliding fit with the piston rod; the piston rod is provided with a front limit structure and a rear limit structure which define the forward-backward moving limitation of the piston; the spacing between the front and the rear limit structures is larger than the axial length of the sliding fit section; the piston is provided with an axial oilhole which penetrates through the piston in a front-rear direction; and the piston rod is provided with a piston cap which is used to block the front orifices or the rear orifices of the axial oilhole and is located at the front or rear side of the piston. The invention provides the oil damper which is capable of achieving different damping effects when performing opening or closing operations, and the breaker actuator which uses the oil damper.
Description
Technical field
The present invention relates to field of circuit breakers, particularly relate to oil bumper and use the breaker operation mechanism of this oil bumper.
Background technology
Oil bumper is a kind of safety guard that can slow down rigid collision in running, and it can extend the action time of shock loading, absorbs and transforms the effect energy of shock loading.In primary cut-out for the oil bumper of spring operating mechanism except possessing protective effect, its damping characteristics can also affect the properties of product of circuit breaker.Existing oil bumper is a kind of oil bumper disclosed in Chinese patent CN201629279U " buffer unit of circuit breaker operating mechanism for accelerating initial speed ", this oil bumper comprises the inner casing that axis extends along the longitudinal direction and the outer shell being sheathed on inner casing periphery, inner casing, between outer shell, there is annular gap, on the cylinder body of inner casing time interval be provided with inner chamber for being communicated with inner casing and annular gap before, rear oilhole, the slidable fit that leads in the inner chamber of inner casing has piston, piston is provided with piston rod, the rear end of piston is provided with the hinge hole for the circle be hinged and connected with mechanism output toggle arm, the front end of the inner chamber of inner casing is provided with speed-raising spring.In use, the outer race of outer shell is provided with tripping spring, piston rod is provided with tripping spring seat.The course of work of this oil bumper is: the inner chamber of inner casing and interior, hydraulic oil is filled with in annular gap between outer shell, when needing the dynamic of circuit breaker, when fixed contact closes a floodgate, switching-in spring releases energy, the energy of switching-in spring passes to moving contact by corresponding transmission mechanism makes moving contact move towards fixed contact, mechanism's output toggle arm of transmission mechanism also drives piston rod to move forward simultaneously, tripping spring starts energy storage, the premenstrual oilhole of hydraulic oil of pistons front sides, annular gap and rear oilhole flow to the rear side of piston, oil forms damping action in flow process, absorb dump energy better, after combined floodgate terminates, piston is pressed on speed-raising spring, when needs separating brake, tripping spring releases energy, piston rod drives piston to move backwards, the power of tripping spring through mechanism's output toggle arm to moving contact transmission, speed-raising spring can increase the separating brake initial velocity of moving contact, and in the process of piston movement backwards hydraulic oil through after oilhole, annular gap and front oilhole flow to the front side of piston, oil forms damping action in flow process.The problem of existing this oil bumper is: 1, dynamic, the separating brake of fixed contact, at the beginning of combined floodgate, piston just starts mobile, oil just produces damping action to the motion of piston, so just have influence on separating brake, the initial velocity of moving contact during combined floodgate, moving contact is easily by the damage of electric arc, although the setting of speed-raising spring adds the initial opening velocity of moving contact, but the combined floodgate initial velocity of moving contact can not be increased, the setting of spring of raising speed in addition also makes the textural anomaly of oil bumper complicated, also to relate to the sealing problem of speed-raising spring terminal, considerably increase assembling difficulty and the cost of manufacture of oil bumper, 2, due in separating brake, making process, hydraulic oil to flow through path identical, the damping causing oil bumper to produce is identical, this is the actual condition not meeting very much spring operating mechanism, because and in real work, the impact of oil bumper on making process is the smaller the better, absorbs because combined floodgate active force wishes to be passed to completely on moving contact instead of by oil bumper, and oil bumper is more the absorption to separating brake active force.
Summary of the invention
The object of the present invention is to provide a kind of oil bumper of different damping effect when realizing breaking-closing operating; The present invention also aims to provide a kind of breaker operation mechanism using this oil bumper.
In order to solve the problem, in the present invention, the technical scheme of oil bumper is:
Oil bumper, comprise the inner casing that axis extends along the longitudinal direction, the slidable fit that leads in the inner chamber of inner casing has piston, piston is provided with piston rod, the outer race of inner casing is provided with outer shell, in, between outer shell, there is annular gap, the cylinder body of inner casing is provided with and is communicated with the inner chamber of inner casing and the front radial direction oil hole of annular gap and rear radial direction oil hole, described piston has the section of being slidably matched be slidably matched that to lead with piston rod, piston rod is provided with limited piston and moves forward and backward the front limit structure of the limit and rear position limiting structure, before, spacing between rear position limiting structure is greater than the axial length of the section of being slidably matched, piston is provided with the axial oilhole running through piston along the longitudinal direction, piston rod is provided with in the front side of piston or rear side for the axial aperture, front end of oilhole of shutoff or the piston cap in aperture, rear end.
Piston cap is positioned at the rear side of piston, and the aperture of described rear radial direction oil hole is greater than the aperture of front radial direction oil hole; Or piston cap is positioned at the front side of piston, the aperture of described rear radial direction oil hole is less than the aperture of front radial direction oil hole.
Described piston comprises the sheathed inner sleeve of inside and outside coaxial line and overcoat, inner sleeve is sheathed on piston rod, the described section of being slidably matched is made up of described inner sleeve, the internal chamber wall of overcoat and inner casing seals and is slidably matched, in, cover front end or rear end between connected by annular connecting plate, described axial oilhole is arranged on described annular connecting plate.
Described piston cap offers run through described piston cap along the longitudinal direction help sorting hole, help the axial oilhole on sorting hole and piston mutually to stagger in the longitudinal direction.
In the present invention, the technical scheme of breaker operation mechanism is:
Breaker operation mechanism, comprise mechanism's output toggle arm and oil bumper, oil bumper comprises the inner casing that axis extends along the longitudinal direction, the slidable fit that leads in the inner chamber of inner casing has piston, piston is provided with the piston rod be connected with mechanism output toggle arm, the outer race of cylinder is provided with outer shell, in, between outer shell, there is annular gap, the cylinder body of inner casing is provided with and is communicated with the inner chamber of inner casing and the front radial direction oil hole of annular gap and rear radial direction oil hole, described piston has the section of being slidably matched be slidably matched that to lead with piston rod, piston rod is provided with limited piston and moves forward and backward the front limit structure of the limit and rear position limiting structure, before, spacing between rear position limiting structure is greater than the axial length of the section of being slidably matched, piston is provided with the axial oilhole running through piston along the longitudinal direction, piston rod is provided with in the front side of piston or rear side for the axial aperture, front end of oilhole of shutoff or the piston cap in aperture, rear end.
Piston cap is positioned at the rear side of piston, and the aperture of described rear radial direction oil hole is greater than the aperture of front radial direction oil hole; Or piston cap is positioned at the front side of piston, the aperture of described rear radial direction oil hole is less than the aperture of front radial direction oil hole.
Described piston comprises the sheathed inner sleeve of inside and outside coaxial line and overcoat, inner sleeve is sheathed on piston rod, the described section of being slidably matched is made up of described inner sleeve, the internal chamber wall of overcoat and inner casing seals and is slidably matched, in, cover front end or rear end between connected by annular connecting plate, described axial oilhole is arranged on described annular connecting plate.
Described piston cap offers run through described piston cap along the longitudinal direction help sorting hole, help the axial oilhole on sorting hole and piston mutually to stagger in the longitudinal direction.
Beneficial effect of the present invention is: during use in the inner chamber of inner casing and annular gap filling liquid force feed, if switch on opportunity structure output toggle arm drives piston rod to move backwards, so piston cap is arranged at the rear side of piston (if switch on opportunity structure output toggle arm drives piston rod to move forward, so piston cap is arranged at the front side of piston), when dynamic, when fixed contact closes a floodgate, piston rod drives piston to move backwards, depart from by hydraulic oil or effect of inertia piston cap and piston, hydraulic oil on rear side of piston flows to pistons front sides through two lines, article one, route is rear radial direction oil hole, annular gap and front radial direction oil hole, another route is the axial oilhole on piston, because the circulation area of hydraulic oil is large, therefore buffer is just little to the damping action of mechanism's output toggle arm, this reduces the influence power that in making process, damper moves to moving contact, when dynamic and static contact separating brake, piston rod drives piston to move forward, piston and piston cap are close to, axial oilhole is by piston shutoff, hydraulic oil can only premenstrual radial direction oil hole, annular gap and this route of rear radial direction oil hole flow on rear side of piston, the circulation area of hydraulic oil is little, and buffer is comparatively large to the damping action of mechanism's output toggle arm, thus dampings different when realizing breaking-closing operating.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of buffer in the present invention;
Fig. 2 is the structural representation of Fig. 1 center tap;
Fig. 3 is the structural representation of inner casing in Fig. 1;
Fig. 4 is the structural representation of piston cap in Fig. 1;
Fig. 5 is the front view of Fig. 4;
Fig. 6 is the structural representation of piston in Fig. 1;
Fig. 7 is the front view of Fig. 6;
Fig. 8 be in making process piston and piston cap coordinate schematic diagram;
Fig. 9 be in separating brake process piston and piston cap coordinate schematic diagram.
Embodiment
The embodiment of breaker operation mechanism is as shown in Fig. 1 ~ 9: this breaker operation mechanism is a spring operating mechanism, spring operating mechanism comprises switching-in spring, tripping spring and oil bumper, switching-in spring is in transmission connection by transmission mechanism and corresponding moving contact, transmission mechanism comprises power output shaft and is arranged at the mechanism's output toggle arm on power output shaft, mechanism's output toggle arm is connected with oil bumper with tripping spring, transmission mechanism belongs to prior art, and its concrete structure no longer describes in detail.Oil bumper comprises the outer shell 1 that inner casing 3 that axis extends along the longitudinal direction and coaxial line are sheathed on inner casing periphery, between inside and outside cylinder, there is annular gap, the cylinder body of inner casing is provided with and is communicated with the inner chamber of inner casing 3 and the front radial direction oil hole 18 of annular gap and rear radial direction oil hole 16, in the present embodiment when switching-in spring releases energy, piston rod moves backwards, and the aperture of rear radial direction oil hole 16 is greater than the aperture of front radial direction oil hole 18.The slidable fit that leads in the inner chamber of inner casing has piston 5, piston is provided with piston rod, piston rod comprises the body of rod 13 be connected with piston and the joint 14 being assemblied in body of rod rear end, joint 14 is provided with hinge hole 15, hinge hole is the elongated hole that length extends along the longitudinal direction, mechanism's output toggle arm is provided with the bearing pin (not shown) be arranged in hinge hole.Piston comprises the sheathed inner sleeve 5-2 of inside and outside coaxial line and overcoat 5-3, inner sleeve 5-2 guiding slip cap is located on piston rod, inner sleeve constitutes the section of being slidably matched be slidably matched that to lead with piston rod, the internal chamber wall of overcoat and inner casing seals and is slidably matched, piston rod is provided with limited piston and moves forward and backward the front limit structure of the limit and rear position limiting structure, spacing between forward and backward position limiting structure is greater than the axial length of the section of being slidably matched, and forward and backward position limiting structure is made up of the back-up ring 4 assembled on the piston rod and snap ring 6 respectively.In, connected by annular connecting plate 5-1 between the rear end of cover, annular connecting plate is provided with the axial oilhole 17 running through annular connecting plate along the longitudinal direction, axial oilhole comprises four mounting holes be evenly arranged around annular connecting plate circumference, piston rod is provided with the piston cap 7 in the aperture, rear end for the axial oilhole 17 of shutoff in the rear side of piston, piston cap offers run through piston cap along the longitudinal direction help sorting hole 19, help the axial oilhole on sorting hole and piston mutually to stagger in the longitudinal direction, the rear end of piston cap is provided with chamfering structure 20.Figure middle term 12 expression prevents piston, piston cap by the capping of deviating from inner casing; Item 10 expression carries out spacing snap ring to capping 12; Item 8,9,11 all represents sealing ring; Item 3 represents hydraulic oil.
The course of work of this breaker operation mechanism is: corresponding dynamic, during fixed contact separating brake, bearing pin is positioned at the front end of hinge hole, when needs move, when fixed contact closes a floodgate, switching-in spring releases energy, the power of switching-in spring is transmitted to moving contact through transmission mechanism, mechanism's output toggle arm drives bearing pin to move backwards, because hinge hole is the elongated hole that a length extends along the longitudinal direction, therefore at the beginning of combined floodgate, piston rod does not move backward, oil bumper does not produce damping action to mechanism's output toggle arm, ensure that the combined floodgate initial velocity of moving contact, the rear end of hinge hole is moved to rear pin shaft, piston rod starts to drive piston to move backwards, hydraulic oil enters between piston cap and piston through helping sorting hole, ensure that piston cap is separated smoothly with piston, axial oilhole on piston is not by piston cap shutoff, hydraulic oil on rear side of piston through two line flows to pistons front sides, article one, circuit is the axial oilhole on piston, another circuit is rear radial direction oil hole, annular gap and front radial direction oil hole, article two, circuit ensure that the circulation area of hydraulic oil, reduce the damping of hydraulic oil, and then reduce the damping of oil bumper to mechanism's output toggle arm, reduce the impact of oil bumper on switch on of moving contact process, and be greater than the aperture of front radial direction oil hole due to the aperture of rear radial direction oil hole, further can improve the through-current capability of hydraulic oil like this, the damping of further reduction hydraulic oil, when needs move, during fixed contact separating brake, tripping spring releases energy, the power of tripping spring passes to moving contact through mechanism's output toggle arm and power output shaft, mechanism's output toggle arm drives bearing pin to move forward, because hinge hole is an elongated hole, therefore at the beginning of separating brake, piston rod does not move forward, oil bumper does not produce damping action to mechanism's output toggle arm, ensure that the separating brake initial velocity of moving contact, the front end of hinge hole is moved to rear pin shaft, piston rod drives piston to move forward, be close to by the rear end of hydraulic oil apply piston and the front end of piston cap, axial oilhole on piston is by piston cap shutoff, the hydraulic oil of pistons front sides can only by front radial direction oil hole, annular gap and this line flows of rear radial direction oil hole are on rear side of piston, the circulation area of hydraulic oil is little, the damping force of hydraulic oil is large, ensure that the damping of oil bumper to mechanism's output toggle arm, and be less than the aperture of rear radial direction oil hole due to the aperture of front radial direction oil hole, further add the damping force of hydraulic oil.Piston is made up of inside and outside cover and the annular connecting plate be arranged between inside and outside cover, can reduce the weight of piston like this, can reduce the cost of manufacture of oil bumper.
In other embodiment of this breaker operation mechanism: this breaker operation mechanism can also be hydraulic actuating mechanism or electromagnetic operating mechanism, and hydraulic actuating mechanism or electromagnetic operating mechanism all belong to prior art, and its concrete structure is introduced no longer in detail; If when closing a floodgate, mechanism's output toggle arm drives piston rod to move forward, and so annular connecting plate will be arranged at the front end of inside and outside cover, and piston cap will be arranged at the front side of piston, and the aperture of front radial direction oil hole is greater than the aperture of rear radial direction oil hole; Certain piston can also be solid piston, and now axial oilhole runs through the front and rear end of solid piston; The sorting hole that helps in piston cap also can not be established, and now relies on the hydraulic oil liquid in piston cap peripheral clearance that piston cap can be made to be separated smoothly with piston; Forward and backward position limiting structure can also be stop nut; The aperture of forward and backward radial direction oil hole also can be consistent; The body of rod of piston rod and joint can also be one-body molded.
The embodiment of oil bumper is as shown in Fig. 1 ~ 9: the concrete structure of buffer is identical with the oil bumper described in above-mentioned each breaker operation mechanism embodiment, is not described in detail in this.
Claims (8)
1. oil bumper, comprise the inner casing that axis extends along the longitudinal direction, the slidable fit that leads in the inner chamber of inner casing has piston, piston is provided with piston rod, the outer race of inner casing is provided with outer shell, in, between outer shell, there is annular gap, the cylinder body of inner casing is provided with and is communicated with the inner chamber of inner casing and the front radial direction oil hole of annular gap and rear radial direction oil hole, it is characterized in that: described piston has the section of being slidably matched be slidably matched that to lead with piston rod, piston rod is provided with limited piston and moves forward and backward the front limit structure of the limit and rear position limiting structure, before, spacing between rear position limiting structure is greater than the axial length of the section of being slidably matched, piston is provided with the axial oilhole running through piston along the longitudinal direction, piston rod is provided with in the front side of piston or rear side for the axial aperture, front end of oilhole of shutoff or the piston cap in aperture, rear end.
2. oil bumper according to claim 1, is characterized in that: piston cap is positioned at the rear side of piston, and the aperture of described rear radial direction oil hole is greater than the aperture of front radial direction oil hole; Or piston cap is positioned at the front side of piston, the aperture of described rear radial direction oil hole is less than the aperture of front radial direction oil hole.
3. oil bumper according to claim 1, it is characterized in that: described piston comprises the sheathed inner sleeve of inside and outside coaxial line and overcoat, inner sleeve is sheathed on piston rod, the described section of being slidably matched is made up of described inner sleeve, the internal chamber wall of overcoat and inner casing seals and is slidably matched, in, cover front end or rear end between connected by annular connecting plate, described axial oilhole is arranged on described annular connecting plate.
4. the oil bumper according to claim 1 ~ 3 any one, is characterized in that: described piston cap offers run through described piston cap along the longitudinal direction help sorting hole, help the axial oilhole on sorting hole and piston mutually to stagger in the longitudinal direction.
5. breaker operation mechanism, comprise mechanism's output toggle arm and oil bumper, oil bumper comprises the inner casing that axis extends along the longitudinal direction, the slidable fit that leads in the inner chamber of inner casing has piston, piston is provided with the piston rod be connected with mechanism output toggle arm, the outer race of cylinder is provided with outer shell, in, between outer shell, there is annular gap, the cylinder body of inner casing is provided with and is communicated with the inner chamber of inner casing and the front radial direction oil hole of annular gap and rear radial direction oil hole, it is characterized in that: described piston has the section of being slidably matched be slidably matched that to lead with piston rod, piston rod is provided with limited piston and moves forward and backward the front limit structure of the limit and rear position limiting structure, before, spacing between rear position limiting structure is greater than the axial length of the section of being slidably matched, piston is provided with the axial oilhole running through piston along the longitudinal direction, piston rod is provided with in the front side of piston or rear side for the axial aperture, front end of oilhole of shutoff or the piston cap in aperture, rear end.
6. breaker operation mechanism according to claim 5, is characterized in that: piston cap is positioned at the rear side of piston, and the aperture of described rear radial direction oil hole is greater than the aperture of front radial direction oil hole; Or piston cap is positioned at the front side of piston, the aperture of described rear radial direction oil hole is less than the aperture of front radial direction oil hole.
7. breaker operation mechanism according to claim 5, it is characterized in that: described piston comprises the sheathed inner sleeve of inside and outside coaxial line and overcoat, inner sleeve is sheathed on piston rod, the described section of being slidably matched is made up of described inner sleeve, the internal chamber wall of overcoat and inner casing seals and is slidably matched, in, cover front end or rear end between connected by annular connecting plate, described axial oilhole is arranged on described annular connecting plate.
8. the breaker operation mechanism according to claim 5 ~ 7 any one, it is characterized in that: described piston cap offers run through described piston cap along the longitudinal direction help sorting hole, help the axial oilhole on sorting hole and piston mutually to stagger in the longitudinal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410296494.2A CN104319195B (en) | 2014-06-27 | 2014-06-27 | Oil bumper and the breaker operation mechanism using the oil bumper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410296494.2A CN104319195B (en) | 2014-06-27 | 2014-06-27 | Oil bumper and the breaker operation mechanism using the oil bumper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104319195A true CN104319195A (en) | 2015-01-28 |
| CN104319195B CN104319195B (en) | 2017-04-05 |
Family
ID=52374411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410296494.2A Active CN104319195B (en) | 2014-06-27 | 2014-06-27 | Oil bumper and the breaker operation mechanism using the oil bumper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104319195B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018233151A1 (en) * | 2017-06-22 | 2018-12-27 | 河南平芝高压开关有限公司 | Contact collision buffer device and sulphur hexafluoride circuit breaker using same |
| CN111192770A (en) * | 2019-12-20 | 2020-05-22 | 平高集团有限公司 | Spring operating mechanism and opening and closing buffer device thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1073140A (en) * | 1996-07-22 | 1998-03-17 | Aleaciones De Metales Sinterisados Sa | Piston for shock absorber |
| CN2608759Y (en) * | 2003-03-10 | 2004-03-31 | 沈阳市长城液压机械厂 | Hydraulic shock absorber |
| DE10245404A1 (en) * | 2002-09-28 | 2004-04-08 | Gkn Sinter Metals Gmbh | Piston body for piston-cylinder-units, esp. shock absorber piston has sintered powder-metallurgic body with integrated projecting and support webs |
| CN101022058A (en) * | 2006-02-28 | 2007-08-22 | 浙江开关厂有限公司 | Gradual damping oil buffer |
| CN201059118Y (en) * | 2007-05-17 | 2008-05-14 | 伍志勇 | Furniture door deoscillator |
| CN201221584Y (en) * | 2008-07-09 | 2009-04-15 | 天津迅达减震器有限公司 | Double-drum type vibration damper capable of improving additional compression resistance |
| CN201241931Y (en) * | 2008-06-26 | 2009-05-20 | 广州栢乐特汽车材料制造有限公司 | Work oil circulation type oil pressure buffer |
| CN202930262U (en) * | 2012-11-15 | 2013-05-08 | 山东泰开高压开关有限公司 | Switching on and off integrated type oil buffer |
| CN203604531U (en) * | 2013-12-17 | 2014-05-21 | 湖南科技大学 | Adjustable viscous damper |
-
2014
- 2014-06-27 CN CN201410296494.2A patent/CN104319195B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1073140A (en) * | 1996-07-22 | 1998-03-17 | Aleaciones De Metales Sinterisados Sa | Piston for shock absorber |
| DE10245404A1 (en) * | 2002-09-28 | 2004-04-08 | Gkn Sinter Metals Gmbh | Piston body for piston-cylinder-units, esp. shock absorber piston has sintered powder-metallurgic body with integrated projecting and support webs |
| CN2608759Y (en) * | 2003-03-10 | 2004-03-31 | 沈阳市长城液压机械厂 | Hydraulic shock absorber |
| CN101022058A (en) * | 2006-02-28 | 2007-08-22 | 浙江开关厂有限公司 | Gradual damping oil buffer |
| CN201059118Y (en) * | 2007-05-17 | 2008-05-14 | 伍志勇 | Furniture door deoscillator |
| CN201241931Y (en) * | 2008-06-26 | 2009-05-20 | 广州栢乐特汽车材料制造有限公司 | Work oil circulation type oil pressure buffer |
| CN201221584Y (en) * | 2008-07-09 | 2009-04-15 | 天津迅达减震器有限公司 | Double-drum type vibration damper capable of improving additional compression resistance |
| CN202930262U (en) * | 2012-11-15 | 2013-05-08 | 山东泰开高压开关有限公司 | Switching on and off integrated type oil buffer |
| CN203604531U (en) * | 2013-12-17 | 2014-05-21 | 湖南科技大学 | Adjustable viscous damper |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018233151A1 (en) * | 2017-06-22 | 2018-12-27 | 河南平芝高压开关有限公司 | Contact collision buffer device and sulphur hexafluoride circuit breaker using same |
| CN111192770A (en) * | 2019-12-20 | 2020-05-22 | 平高集团有限公司 | Spring operating mechanism and opening and closing buffer device thereof |
| CN111192770B (en) * | 2019-12-20 | 2022-06-14 | 平高集团有限公司 | Spring operating mechanism and opening and closing buffer device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104319195B (en) | 2017-04-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104299812B (en) | Integrated connecting lever and the spring operating mechanism using this integrated connecting lever | |
| CN104299809B (en) | Spring assembly and spring operating mechanism using the same | |
| WO2015192602A1 (en) | Hydraulic operating mechanism for high pressure switch and hydraulic working cylinder thereof | |
| CN104217870A (en) | Trip device and spring actuation mechanism with same | |
| CN104299862A (en) | Buffer and circuit breaker operating mechanism using the same | |
| CN105351426A (en) | Vibration reducer and switching device | |
| CN102734368A (en) | Hydraulic shock absorber | |
| CN104319195A (en) | An oil damper and a breaker actuator using the oil damper | |
| CN104134557B (en) | Spring operating mechanism buffer for circuit breaker | |
| CN105351427A (en) | Buffer device and mechanical switch | |
| CN104121251A (en) | Buffering device for hydraulic cylinder | |
| CN204279598U (en) | Steering column and automobile | |
| CN204113987U (en) | A kind of coal plough spring buffer | |
| CN204419758U (en) | A kind of buffering hydraulic cylinder | |
| CN204340999U (en) | A kind of brake pedal with anti-intrusion function | |
| CN104074836A (en) | High speed hydraulic cylinder buffer mechanism | |
| CN105465264A (en) | Vibration damping device and switch equipment | |
| CN105513910B (en) | A kind of spring operating mechanism | |
| CN204270911U (en) | Oil bumper and high voltage DC breaker | |
| CN203948552U (en) | City railway vehicle current collection device damping cylinder | |
| CN107654441B (en) | Gear shifting cylinder of synchronizer | |
| CN104299810A (en) | Rack and spring operating mechanism using the same | |
| CN104377055A (en) | Oil buffer and high-voltage direct-current breaker | |
| CN112908771A (en) | Circuit breaker and arc extinguish chamber thereof | |
| CN204067089U (en) | A kind of trip gear and use the spring operating mechanism of this trip gear |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |