CN105047446A - Hydraulic buffer and breaker operating mechanism using same - Google Patents
Hydraulic buffer and breaker operating mechanism using same Download PDFInfo
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- CN105047446A CN105047446A CN201510366406.6A CN201510366406A CN105047446A CN 105047446 A CN105047446 A CN 105047446A CN 201510366406 A CN201510366406 A CN 201510366406A CN 105047446 A CN105047446 A CN 105047446A
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- piston
- piston rod
- oil cylinder
- jointing
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- 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
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Abstract
The present invention relates to a hydraulic buffer and a breaker operating mechanism using the same. The hydraulic buffer comprises an oil cylinder and a piston arranged in the oil cylinder, the piston is connected with a piston rod, and a first channel for communicating a rod chamber and a rodless chamber of the oil cylinder is arranged between the piston and the oil cylinder and/or on the piston. The piston is assembled on the piston rod along an axial slidable anti-drop device, one end of the piston rod close to the rodless chamber is equipped with a second channel, and the first end port of the second channel is located on the outer circumferential surface of the piston rod. The piston can seal the first end port via an inner wall surface when moving towards the rodless chamber along with the piston rod, and can avoid the first end port when moving towards the rod chamber along with the piston rod. The hydraulic buffer and the breaker operating mechanism using the same of the present invention solve the technical problem that the hydraulic buffer is much in parts and complicated in assembly, so that the production efficiency is low, and the product cost is high.
Description
Technical field
The present invention relates to a kind of hydraulic bjuffer and use the breaker operation mechanism of this hydraulic bjuffer.
Background technology
Buffer is commonly used in high-voltage fence equipment for power transmission and distribution circuit breaker power source spring operating mechanism; buffer is a kind of safety guard that can slow down rigid collision in running, and the buffering effect quality of buffer drastically influence the performance index of circuit breaker.
Have in prior art and adopt single cylinder structure and interior, the buffer of the two oil recess structure of outer shell, if date of publication is 2015.01.21, in publication No. one disclosed in the Chinese invention patent application of CN104299862A, the buffer of the two oil recess structure of outer shell, this buffer comprises the outer shell that inner casing that axis extends along the longitudinal direction and coaxial line are set in inner casing periphery, between inner casing and 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, the slidable fit that leads in the inner chamber of inner casing has piston, piston is provided with piston rod, piston comprises the sheathed inner sleeve of inside and outside coaxial line and overcoat, inner sleeve 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 the front limit structure of the movable limit of limited piston 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, in, connect by annular connecting plate between the rear end of overcoat, annular connecting plate is provided with the axial oilhole 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 in the aperture, rear end for the axial oilhole of shutoff in the rear side of piston, piston cap offers run through piston cap along the longitudinal direction help sorting hole, sorting hole and axial oilhole is helped mutually to stagger, this buffer in the course of the work, when piston rod drives piston to move backward, hydraulic oil is through helping sorting hole to enter between piston cap and piston, piston cap is separated smoothly with piston, axial oilhole on piston does not put piston cap shutoff, and the hydraulic oil on rear side of piston is through two line flows to pistons front sides, and circuit is the axial oilhole on piston, another is rear radial direction oil hole, annular gap and front radial direction oil hole, and the circulation area of hydraulic oil is large, when 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 is merely able to by front radial direction oil hole, annular gap and this line flows of rear radial direction oil hole on rear side of piston, the circulation area of hydraulic oil is little, and the damping force of hydraulic oil is large.
This buffer is in order to form two hydraulic oil flow cycles, oil cylinder adopts the inner casing and outer shell that are coaxially set-located, annular oil cavity is formed between inner casing and outer shell, before interior casing wall is offered, rear radial direction oil hole, when piston moves forward and backward, hydraulic oil is by front, rear radial direction oil hole circulation formation oily passage, the piston hydraulic oil in process that seesaws can be flowed by annular oil cavity, but, this buffer adopt coaxially sheathed in, outer shell, cause the parts of buffer more, in order to ensure the sealing between inner casing and outer shell, require also higher to both quality of fits in process of production, and then reduce production efficiency, make product cost higher, in addition, because axial oilhole is opened on piston, in order to can the axial oilhole of shutoff, the piston of this buffer comprises inner sleeve, overcoat, annular connecting plate, and piston rod also arranges piston cap, and the parts that piston rod is arranged are more, when assembling, need the various piece of piston to fit together, by piston cap dress on the piston rod, then piston is installed on the piston rod, therefore, the assembling process of this buffer is comparatively complicated, reduces production efficiency further, increases product cost.
Summary of the invention
The object of this invention is to provide a kind of hydraulic bjuffer adopting single cylinder structure, complicated in order to solve the more assembling of hydraulic bjuffer parts in prior art, cause the technical problem that production efficiency low production cost is high.The present invention also aims to provide a kind of breaker operation mechanism using above-mentioned hydraulic bjuffer.
For achieving the above object, the present invention adopts following technical scheme:
Hydraulic bjuffer, comprise oil cylinder and be located at the piston in oil cylinder, piston is connected with piston rod, between piston with oil cylinder and/or piston be provided with and be communicated with the rod chamber of oil cylinder and the first passage of rodless cavity, piston vertically slidably anticreep assembling on the piston rod, one end of the close rodless cavity of piston rod is provided with second channel, first port of second channel is positioned on piston rod outer peripheral face, piston closes the first port when moving to rodless cavity with piston rod by internal face, can get out of the way the first port when moving to rod chamber with piston rod.
Described first passage is the gap between piston outer periphery face and oil cylinder inner wall, and described oil cylinder inner wall is taper seat, and the miner diameter end of taper seat is positioned at the rodless cavity of oil cylinder, and described gap reduces gradually when piston moves towards rodless cavity.
Described second channel comprises and to be opened on piston rod rear end face axis along the axially extended blind hole of piston rod be opened in oil-through hole blind hole sidewall running through blind hole sidewall, and the outer aperture of described oil-through hole is described first port.
The axis of described piston rod extends along front and back, the conical section that described piston rod comprises large footpath section, path section and is arranged between large footpath section and path section, described path section is positioned at the rear of large footpath section, the path section of piston rod and piston guide are slidably matched, the radius of conical section reduces from front to back gradually, and the outer peripheral face of described conical section constitutes the conical stopping surface for coordinating with piston nose block to limit piston extreme position.
One end of the close cylinder rod chamber of piston offers the circular groove coaxial with piston rod, and when piston inner wall closes the outer aperture of oil-through hole, the notch edge of described circular groove and groove bottom wall coordinate with described conical stopping surface block respectively.
Described piston rod is provided with the jointing with hinge hole away from one end of piston, and the length direction of described hinge hole extends along the axis of piston rod.
Described piston rod is provided with jointing away from one end of piston, and described jointing and piston rod are threaded connection, and described piston rod or jointing are provided with and prevent the jointing spin-ended structure that rotate relative to piston rod.
Described jointing is provided with internal thread hole, the corresponding end of described piston rod is provided with the external screw thread stud for coordinating with internal thread hole, described spin-ended structure comprises the perforation be opened on jointing internal thread hole sidewall, is coated with the tight fixed bolt for holding out against described external screw thread stud in perforation.
Described external screw thread stud offers the elongated slot that length extends vertically, the end of described tight fixed bolt is positioned at elongated slot and rotates to stop jointing opposing pistons bar.
Breaker operation mechanism, comprise and export main connecting lever, the main connecting lever of described output is connected with the hydraulic bjuffer as said structure.
Advantageous Effects of the present invention is: hydraulic bjuffer of the present invention arranges first passage between piston and oil cylinder or on piston, offer second channel on the piston rod, first passage is communicated with rod chamber and rodless cavity with second channel, piston and the piston rod slip slip-off preventing that leads coordinates, when piston leads on the piston rod and slides, piston inner wall can by the first port closed of second channel, when piston rod drives piston to move towards rodless cavity, piston inner wall closes the first port of second channel, hydraulic oil can only flow through in first passage, reduce the circulation area of hydraulic oil, increase damping force, when piston rod drives piston to move to rod chamber, piston inner wall gets out of the way the first port of second channel, hydraulic oil can flow from two lines, increase the circulation area of hydraulic oil, reduce damping action.Compared with forming the mode of oily passage with oil cylinder inside and outside adopting in prior art, the present invention arranges first passage between oil cylinder inner wall and piston or on piston, can reduce the quantity of parts; In addition, and on piston, offer axial oilhole in prior art arrange piston cap again and come compared with the mode of closed oilhole, structure of the present invention is simple, saves product cost, is convenient to assembling and produces, enhance productivity.
As a further improvement on the present invention, first passage is the gap between oil cylinder and piston, oil cylinder inner wall is taper seat, the radius of taper seat reduces from front to back gradually, when piston rod drives piston to move backwards, first passage reduces gradually, because now hydraulic oil can only be flowed by first passage, the circulation area of hydraulic oil is reduced further, and then increase piston damping power, further increase buffering effect, otherwise, when piston rod drives piston to move forward, first passage increases gradually, the circulation area of hydraulic oil increases, the damping force that piston is subject to reduces.
Accompanying drawing explanation
Fig. 1 is the structure cutaway view of a kind of embodiment of buffer in the present invention;
Fig. 2 is the explosive view of a kind of embodiment of buffer in the present invention;
The operating diagram of buffer when Fig. 3 is separating brake;
The operating diagram of buffer when Fig. 4 is combined floodgate;
In figure: 1, jointing, 2, pre-load nut, 3, tight fixed bolt, 4, piston rod, 5, dust ring, 6, lid, 7, sealing ring, 8, cylinder body, 81, inboard wall of cylinder block, 9, piston, 10, back-up ring, 11, hinge hole, 12, first passage, 13, oil-through hole.
Embodiment
The embodiment of breaker operation mechanism of the present invention, as shown in Figures 1 to 4, this breaker operation mechanism is a spring operating mechanism, spring operating mechanism comprises switching-in spring, tripping spring and buffer, switching-in spring is in transmission connection by transmission mechanism and corresponding moving contact, and transmission mechanism comprises power output shaft and is arranged at the main connecting lever of output on power output shaft, exports main connecting lever and is connected with buffer with tripping spring, transmission mechanism belongs to prior art, and its concrete structure no longer describes in detail.Buffer is hydraulic bjuffer, hydraulic bjuffer comprises the oil cylinder axially extended along the longitudinal direction, the rear end of oil cylinder is provided with the articulated section hinged with exporting main connecting lever, oil cylinder comprises cylinder body 8 and is arranged on the lid 6 of cylinder body 8 front end, lid 6 is threaded connection in cylinder body 8 front end, lid 6 lateral surface offers step groove, when installing lid 6, by erecting tools, lid 6 can be screwedly mounted on the front end of cylinder body 8, cylinder body 8 inwall is provided with internal thread, the rear end of lid 6 is provided with external screw thread stud, is provided with sealing ring 7 between cylinder body and lid.Piston 9 is had in oil cylinder, piston 9 is connected with piston rod 4, dust ring 5 and pilot seal circle is provided with between the leading section of lid 6 and piston rod 4, the front end of piston rod 4 is connected with the jointing 1 of band hinge hole 11, the elongated hole that hinge hole 11 extends along the longitudinal direction for length, export the bearing pin (not shown in FIG.) main connecting lever being provided with and being arranged in hinge hole, in the present embodiment, jointing 1 and piston rod 4 are together by a threaded connection, jointing 1 is provided with internal thread hole, piston rod front end has the external screw thread stud coordinated with internal thread hole spinning, in order to when preventing buffer operative, jointing 1 and piston rod 4 relatively rotate, jointing 1 is provided with the spin-ended structure for preventing jointing from rotating, described spin-ended structure comprises the perforation be opened on internal thread hole sidewall and the tight fixed bolt 3 be located in perforation, tight fixed bolt 3 is provided with the pre-load nut 2 regulating tight fixed bolt, external screw thread stud offers elongated slot, the length direction of elongated slot extends vertically, during installation, the end of tight fixed bolt 3 extend in elongated slot to stop jointing opposing pistons bar to rotate, in other embodiments, internal thread hole can be set in piston rod rear end, the external screw thread stud coordinated with internal thread hole is set in jointing front end, spin-ended vibrational power flow on the piston rod, external screw thread stud can not arrange elongated slot, and during installation, tight fixed bolt holds out against external screw thread stud and stops jointing opposing pistons bar to rotate, jointing can also be connected with piston rod.
Piston rod and piston 9 lead and are slidably matched, and piston 9 relative to piston rod slide anteroposterior, can have first passage 12 between the lateral surface of piston 9 and oil cylinder inner wall, first passage 12 is communicated with rod chamber and rodless cavity.Piston rod 4 offers the second channel being communicated with rod chamber and rodless cavity, described second channel comprises the blind hole that is opened on piston rod 4 rear end face and is opened in blind hole sidewall and runs through the oil-through hole 13 of blind hole sidewall, the outer aperture of oil-through hole 13 is the first port of second channel, the opening of blind hole is the second port of second channel, when piston rod drives piston 9 to move to rodless cavity, piston 9 opposing pistons bar guiding is slided, piston 9 inwall closes the first port of second channel, second channel is in closed condition, hydraulic oil can only flow in rod chamber through first passage, the circulation area of hydraulic oil reduces, the damping force that piston is subject to increases, when piston rod drives piston 9 to move to rod chamber, piston slides along piston rod guiding, piston 9 inwall abdicates the first port, second channel is in open mode, hydraulic oil flows in rodless cavity through first passage and second channel from rod chamber, the circulation area of hydraulic oil increases, and piston is subject to damping force and reduces.
Come off from piston rod to prevent piston, piston rod is provided with position limiting structure, in the present embodiment, piston rod 4 comprises large footpath section, path section and be arranged on the conical section that the radius between large footpath section and path section reduces from front to back gradually, path section is positioned at the rear of large footpath section, the activity of piston 9 guiding is assemblied in the path section of piston rod, the path section of piston rod offers the groove of annular in the rear of piston, back-up ring 10 is provided with in groove, when piston 9 opposing pistons bar 4 slides backward, back-up ring limits the extreme position that piston slides backward, when piston opposing pistons bar forward slip is to extreme position, conical section coordinates with piston nose block, the outer peripheral face of conical section is the conical stopping surface of limited piston extreme position, conical section and back-up ring constitute the front limit structure that limited piston moves forward and backward extreme position, rear position limiting structure.
In the present embodiment, the front end face of piston offers the circular groove coaxial with piston rod, the diameter of groove is less than the diameter of piston rod large footpath section, and be greater than the diameter of path section, when piston moves forward relative to piston rod, the notch of groove is along coordinating with conical stopping surface block, the diapire of groove coordinates with conical stopping surface block, notch edge and the conical stopping surface of groove, groove bottom wall and conical stopping surface form dual block and coordinate, ensure that the outer aperture of oil-through hole is by complete shutoff, when making breaker open operation, in-oil cylinder hydraulic oil can only be circulated by first passage.
In order to increase damping, inboard wall of cylinder block 81 in the present embodiment is conical wall, the miner diameter end of conical wall is positioned at rodless cavity, bigger diameter end is positioned at rod chamber, piston comprises the column part being positioned at piston rear end portion, the face of cylinder of piston and inboard wall of cylinder block form annular gap, and when piston rod drives piston to move to rodless cavity, the radial width of annular gap reduces gradually.When piston rod drives piston 9 to move to rodless cavity, the radius of inboard wall of cylinder block 81 reduces gradually, the radial width of annular gap reduces gradually, the circulation area of hydraulic oil reduces gradually, along with the reduction of circulation area, again because the hydraulic oil in rodless cavity can only flow in rod chamber through first passage 12, the damping force that piston is subject to is larger, thus reach good buffering effect, when piston rod drives piston to move to rod chamber, the radius of inboard wall of cylinder block 81 increases gradually, the radial width of annular gap increases gradually, the circulation area of hydraulic oil increases gradually, hydraulic oil in rod chamber is through first passage, second channel flow in rodless cavity, along with the increase of circulation area, the damping force that piston is subject to reduces.
The course of work of this breaker operation mechanism is: corresponding dynamic, when fixed contact closes a floodgate, bearing pin is positioned at the front end of hinge hole, when needs move, during fixed contact separating brake, tripping spring releases energy, the power of tripping spring is transmitted to moving contact through the main connecting lever of output and power output shaft, exporting main connecting lever 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 can not move immediately backward, buffer does not produce damping action to the main connecting lever of output, ensure that the separating brake 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 towards rodless cavity, the outer aperture of oil leakaging port is by piston shutoff, hydraulic oil in rodless cavity can only flow in rod chamber through first passage, the circulation area of hydraulic oil reduces, the damping force that piston is subject to increases, and the radial width of first passage reduces to reduce circulation area further, further increase damping.When needs move, when fixed contact closes a floodgate, switching-in spring releases energy, the power of switching-in spring passes to moving contact through transmission mechanism, exporting main connecting lever drives bearing pin to move forward, because hinge hole is elongated hole, at the beginning of combined floodgate, piston rod can not move forward, buffer can not produce damping action to output toggle arm, ensure that the combined floodgate initial velocity of moving contact, the front end of hinge hole is moved to rear pin shaft, piston rod drives piston to move towards rod chamber, piston abdicates the outer aperture of oil-through hole, hydraulic oil is through first passage, second channel flows in rodless cavity, increase the circulation area of hydraulic oil, and the radial width of first passage increases gradually, further increase circulation area, reduce damping.
In other embodiments of this breaker operation mechanism: oil cylinder inner wall can be the isometrical face of cylinder, first passage can for being opened in the axial oilhole on piston, first passage can also be the axial oilhole be opened on piston and the gap be arranged between oil cylinder and piston, or first passage is be opened in the axial oilhole on piston and the bar shaped oil groove between oil cylinder and piston, the length of bar shaped oil groove axially extends along piston; Forward and backward position limiting structure and can be stop nut, or position limiting structure is stop nut afterwards, and front limit structure is limited step; Piston rod and jointing can also be one-body molded; Piston can not offer circular groove, and when piston is to the front extreme position of piston rod, the front end face of piston extrudes with conical stopping surface and coordinates.
As shown in Figures 1 to 4, the concrete structure of buffer is identical with the buffer described in above-mentioned each breaker operation mechanism embodiment, is not described in detail in this for the embodiment of hydraulic bjuffer.
Claims (10)
1. hydraulic bjuffer, it is characterized in that: comprise oil cylinder and be located at the piston in oil cylinder, piston is connected with piston rod, between piston with oil cylinder and/or piston be provided with and be communicated with the rod chamber of oil cylinder and the first passage of rodless cavity, piston vertically slidably anticreep assembling on the piston rod, one end of the close rodless cavity of piston rod is provided with second channel, first port of second channel is positioned on piston rod outer peripheral face, piston closes the first port when moving to rodless cavity with piston rod by internal face, can get out of the way the first port when moving to rod chamber with piston rod.
2. hydraulic bjuffer according to claim 1, it is characterized in that: described first passage is the gap between piston outer periphery face and oil cylinder inner wall, described oil cylinder inner wall is taper seat, the miner diameter end of taper seat is positioned at the rodless cavity of oil cylinder, and described gap reduces gradually when piston moves towards rodless cavity.
3. hydraulic bjuffer according to claim 1, it is characterized in that: described second channel comprises and to be opened on piston rod rear end face axis along the axially extended blind hole of piston rod be opened in oil-through hole blind hole sidewall running through blind hole sidewall, and the outer aperture of described oil-through hole is described first port.
4. the hydraulic bjuffer according to claim 1 or 2 or 3, it is characterized in that: the axis of described piston rod extends along front and back, the conical section that described piston rod comprises large footpath section, path section and is arranged between large footpath section and path section, described path section is positioned at the rear of large footpath section, the path section of piston rod and piston guide are slidably matched, the radius of conical section reduces from front to back gradually, and the outer peripheral face of described conical section constitutes the conical stopping surface for coordinating with piston nose block to limit piston extreme position.
5. hydraulic bjuffer according to claim 4, it is characterized in that: one end of the close cylinder rod chamber of piston offers the circular groove coaxial with piston rod, when piston inner wall closes the outer aperture of oil-through hole, the notch edge of described circular groove and groove bottom wall coordinate with described conical stopping surface block respectively.
6. the hydraulic bjuffer according to claim 1 or 2 or 3, is characterized in that: described piston rod is provided with the jointing with hinge hole away from one end of piston, and the length direction of described hinge hole extends along the axis of piston rod.
7. the hydraulic bjuffer according to claim 1 or 2 or 3, it is characterized in that: described piston rod is provided with jointing away from one end of piston, described jointing and piston rod are threaded connection, and described piston rod or jointing are provided with and prevent the jointing spin-ended structure that rotate relative to piston rod.
8. hydraulic bjuffer according to claim 7, it is characterized in that: described jointing is provided with internal thread hole, the corresponding end of described piston rod is provided with the external screw thread stud for coordinating with internal thread hole, described spin-ended structure comprises the perforation be opened on jointing internal thread hole sidewall, is coated with the tight fixed bolt for holding out against described external screw thread stud in perforation.
9. hydraulic bjuffer according to claim 8, is characterized in that: described external screw thread stud offers the elongated slot that length extends vertically, and the end of described tight fixed bolt is positioned at elongated slot and rotates to stop jointing opposing pistons bar.
10. breaker operation mechanism, comprises and exports main connecting lever, it is characterized in that: the main connecting lever of described output is connected with the hydraulic bjuffer as described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366406.6A CN105047446B (en) | 2015-06-29 | 2015-06-29 | Hydraulic bjuffer and the breaker operation mechanism using the hydraulic bjuffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366406.6A CN105047446B (en) | 2015-06-29 | 2015-06-29 | Hydraulic bjuffer and the breaker operation mechanism using the hydraulic bjuffer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105047446A true CN105047446A (en) | 2015-11-11 |
| CN105047446B CN105047446B (en) | 2017-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510366406.6A Active CN105047446B (en) | 2015-06-29 | 2015-06-29 | Hydraulic bjuffer and the breaker operation mechanism using the hydraulic bjuffer |
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| Country | Link |
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| CN (1) | CN105047446B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873087A (en) * | 2018-08-29 | 2020-03-10 | 宁波市鑫潮自动化元件有限公司 | Cylinder with adjustable piston rod control position |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2552151Y (en) * | 2002-08-12 | 2003-05-21 | 天水长城开关厂 | Oil buffer for circuit breaker |
| CN2727945Y (en) * | 2004-07-01 | 2005-09-21 | 广东省顺德开关厂有限公司 | Oil buffer for circuit breaker |
| CN101022058A (en) * | 2006-02-28 | 2007-08-22 | 浙江开关厂有限公司 | Gradual damping oil buffer |
| CN201443576U (en) * | 2009-08-04 | 2010-04-28 | 益和电气集团股份有限公司 | Novel hydraulic buffer |
| CN104299862A (en) * | 2014-06-27 | 2015-01-21 | 国家电网公司 | Buffer and circuit breaker operating mechanism using the same |
| CN104377055A (en) * | 2014-11-17 | 2015-02-25 | 河南平高电气股份有限公司 | Oil buffer and high-voltage direct-current breaker |
-
2015
- 2015-06-29 CN CN201510366406.6A patent/CN105047446B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2552151Y (en) * | 2002-08-12 | 2003-05-21 | 天水长城开关厂 | Oil buffer for circuit breaker |
| CN2727945Y (en) * | 2004-07-01 | 2005-09-21 | 广东省顺德开关厂有限公司 | Oil buffer for circuit breaker |
| CN101022058A (en) * | 2006-02-28 | 2007-08-22 | 浙江开关厂有限公司 | Gradual damping oil buffer |
| CN201443576U (en) * | 2009-08-04 | 2010-04-28 | 益和电气集团股份有限公司 | Novel hydraulic buffer |
| CN104299862A (en) * | 2014-06-27 | 2015-01-21 | 国家电网公司 | Buffer and circuit breaker operating mechanism using the same |
| CN104377055A (en) * | 2014-11-17 | 2015-02-25 | 河南平高电气股份有限公司 | Oil buffer and high-voltage direct-current breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110873087A (en) * | 2018-08-29 | 2020-03-10 | 宁波市鑫潮自动化元件有限公司 | Cylinder with adjustable piston rod control position |
| CN110873087B (en) * | 2018-08-29 | 2021-10-22 | 宁波市鑫潮自动化元件有限公司 | Cylinder with adjustable piston rod control position |
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| CN105047446B (en) | 2017-12-22 |
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