EP2768005A1 - Rotation double-breakpoint movable contact module - Google Patents
Rotation double-breakpoint movable contact module Download PDFInfo
- Publication number
- EP2768005A1 EP2768005A1 EP12840034.8A EP12840034A EP2768005A1 EP 2768005 A1 EP2768005 A1 EP 2768005A1 EP 12840034 A EP12840034 A EP 12840034A EP 2768005 A1 EP2768005 A1 EP 2768005A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hole
- shaft
- connection member
- rod
- shaped 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.)
- Granted
Links
- 230000009977 dual effect Effects 0.000 claims abstract description 48
- 230000001788 irregular Effects 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005520 electrodynamics Effects 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/04—Contacts
- H01H73/045—Bridging contacts
Definitions
- the present invention relates to contact module of circuit breaker, more particularly, relates to rotary dual breakpoint moving contact module in operation mechanism of circuit breaker.
- Dual breakpoint structure is a trend of modern molded case circuit breakers. As an important component of the molded case circuit breaker, contact modules has drawn great attention. Modern molded case circuit breakers with high breaking ability generally use rotary dual breakpoint moving contact structures, which are of various forms. Some of the conventional rotary moving contact structures have additional functions, the additional functions mainly include automatic lock of the moving contact after opening by electrodynamic repulsion force, so as to prevent rebound of the moving contact.
- the present invention provides a rotary dual breakpoint moving contact module having a different structure with the traditional products. A repulsion and lock apparatus with a simple structure, high reliability and less components is provided.
- the apparatus may quickly lock the contact bridge at a limit position of a clearance distance of open contacts.
- Another problem that must be solved by the rotary dual breakpoint moving contact structure is to keep balance of the contact pressure applied to the contacts on both sides.
- the present invention is able to significantly improve the balance between the contact pressure on both sides, while both contact pressure satisfy the desire pressure requirements.
- the present invention also provides a spring protection mechanism to prevent the spring from damage caused by arc or metal particles.
- the Chinese patent application with a publication number of CN101320659A , and an application number of 200810040543.0 discloses a rotary dual breakpoint structure of a molded case circuit breaker, comprising: a rod-shaped block rotor having a shaft hole at the axial geometrical center, a plurality of centrally symmetric connection rod through holes on both axial sides, centrally symmetric linkage holes on both axial ends, a contact bridge through hole at the radial center, sidewalls on both radial sides of the rod-shaped block rotor having openings for assembling the contact bridge; a contact bridge passing through the contact bridge through hole and assembled in the openings of the rod-shaped block rotor, the contact bridge having a second through hole at the axial geometrical center, the second through aligning with the shaft hole, a second shaft going through the second through hole and the shaft hole, the contact bridge having a plurality of centrally symmetric first through holes; a set of connection rods, each having a connection hole and a convex
- the contact bridge of the rotary dual breakpoint structure disclosed in the above patent application uses a slide block mechanism rather than a connection member.
- the mechanical movement trajectory of the slide block mechanism and the connection member mechanism are completely different.
- the slide block mechanism may cause sliding friction which may influence the moving flexibility.
- the rod-shaped block rotor of the above application has a plurality of assembly holes, which may increase the complexity of the assemble procedure due to more assembly procedures.
- the present invention discloses a rotary dual breakpoint moving contact module with a new structure, which is used in a contact module of molded case circuit breaker.
- the present invention is able to realize large current short circuit breaking of rotary dual breakpoint moving contacts.
- the moving contacts may open quickly and rebound of the moving contacts is prevented, and the contact pressure on two contact points is balanced.
- a rotary dual breakpoint moving contact module comprises:
- the rod-shaped block rotor is single phase independent and has a first through hole at the center, a first shaft is mounted in the first through hole, the rod-shaped block rotor has a first recess on each axial side face, a contact spring is mounted in each first recess, the contact spring is able to move within a range defined by the first recess;
- first connection member is mounted on the rod-shaped block rotor, second shaft goes through the first connection member;
- the contact bridge crosses through the rod-shaped block rotor, the outer profile of the contact bridge is centrally symmetric, the first shaft and the third shaft go through the contact bridge respectively, contacts are welded to the end points on both sides of the contact bridge.
- the rod-shaped block rotor has two linkage holes and two semicircle slot holes on each axial side face, the two linkage holes are symmetric along the center of the rod-shaped rotor, the two semicircle slot holes are symmetric along the center of the rod-shaped rotor, a fixed angle is between a line connecting the geometric centers of the two linkage holes on a same axial side face and a line connecting the geometric centers of the two semicircle slot holes on the same axial side face, the linkage holes on different axial side faces are axial concentric, and the semicircle slot holes on different axial side faces are axial concentric.
- the rod-shaped block rotor has an irregular through hole in radial direction, the width of the irregular through hole allows the contact bridge to cross through, the rod-shaped block rotor also has second recesses in radial direction, each second recess surrounds a semicircle slot hole.
- the irregular through hole has two first curved faces which are centrally symmetric, the first curved faces match with the outer profile of the contact bridge to define an initial pressure position and a maximum open position of the contact bridge.
- the outer profile of the contact bridge has two second curved faces which are centrally symmetric, the second curved faces match with the first curved faces.
- the first connection member is mounted within the two semicircle slot holes which are axial concentric, the first connection member slides within the second recesses using the semicircle slot hole as the rotation center, the angle of rotation of the first connection member is limited by the length of the second recess.
- the first connection member has a second through hole and a convex short shaft on both sides, the short shaft matches with the semicircle slot hole, the second through hole matches with the second shaft.
- a plane thickness of the first connection member is not larger than a depth of the second recess.
- the second connection member has a third through hole and a fourth through hole on both ends, the third through hole matches with the second shaft, the fourth through hole matches with the third shaft.
- the contact bridge has two fifth through holes which are centrally symmetric, the third shaft is mounted within the fifth holes.
- the contact bridge has a slotted hole at the center, the first shaft passed through the slotted hole and is able to slide within the slotted hole along the longitudinal direction, the longitudinal direction of the slotted hole has a fixed angle to a contact welding surface of the contacts welded on the contact bridge.
- the contact spring is suspended on two second shafts which are centrally symmetric, and moves within the first recess on the rod-shaped block rotor.
- the rotary dual breakpoint moving contact module of the present invention is able to realize large current short circuit breaking of rotary dual breakpoint moving contacts.
- the moving contacts may open quickly and rebound of the moving contacts is prevented, and the contact pressure on two contact points is balanced.
- the present invention discloses a rotary dual breakpoint moving contact module.
- Figs. 1 ⁇ 10 illustrate a rotary dual breakpoint moving contact module according to an embodiment of the present invention.
- the rotary dual breakpoint moving contact module comprises a rod-shaped block rotor 101, a first connection member 102, a second connection member 103, a contact bridge 104, a first shaft 105, second shafts 106, a third shaft 107 and contact springs 108.
- the rod-shaped block rotor 101 is single-phase independent.
- the rod-shaped block rotor 101 has a first through hole 110 at the center.
- the first shaft 105 is mounted in the first through hole 110.
- the rod-shaped block rotor 101 has a first recess 111 on each axial side face.
- the contact spring 108 is mounted in each first recess 111.
- the contact spring 108 is able to move within a range defined by the first recess 111.
- the first connection member 102 is mounted on the rod-shaped block rotor 101.
- the second shaft 106 goes through the first connection member 102.
- the second shaft 106 and the third shaft 107 goes through the second connection member 103 respectively.
- the contact bridge 104 crosses through the rod-shaped block rotor 101.
- the outer profile of the contact bridge 104 is centrally symmetric.
- the first shaft 105 and the third shaft 107 go through the contact bridge 104 respectively.
- Contacts are welded to the end points on both sides of the contact bridge 104.
- Figs. 3a, 3b, 3c and 3d illustrate the rod-shaped block rotor of the rotary dual breakpoint moving contact module according to an embodiment of the present invention.
- the two linkage holes 112 are symmetric along the center of the rod-shaped rotor, and the two semicircle slot holes 113 are also symmetric along the center of the rod-shaped rotor.
- a fixed angle is between a line connecting the geometric centers of the two linkage holes 112 on a same axial side face and a line connecting the geometric centers of the two semicircle slot holes 113 on the same axial side face.
- the linkage holes 112 on different axial side faces are axial concentric, and the semicircle slot holes 113 on different axial side faces are also axial concentric.
- the rod-shaped block rotor 101 has an irregular through hole 114 in radial direction. The width of the irregular through hole 114 allows the contact bridge 104 to cross through.
- the irregular through hole 114 has two first curved faces 116 which are centrally symmetric.
- the first curved faces 116 match with the outer profile of the contact bridge 104 to define an initial pressure position and a maximum open position of the contact bridge 104.
- the rod-shaped block rotor 101 also has second recesses 115 in radial direction. Each second recess 115 surrounds a semicircle slot hole 113. The total number of the second recesses 115 is also four.
- Figs. 2a and 2b illustrate the contact bridge of the rotary dual breakpoint moving contact module according to an embodiment of the present invention.
- the contact bridge 104 has two fifth through holes 140 which are centrally symmetric.
- the third shaft 107 is mounted within the fifth holes 140.
- the third shaft 107 fits in the fifth holes 140 with small clearance.
- the contact bridge 104 has a slotted hole 141 at the center.
- the first shaft 105 passes through the slotted hole 141.
- the first shaft 105 fits in the slotted hole 141 with small clearance and is able to slide within the slotted hole 141 along the longitudinal direction.
- the longitudinal direction of the slotted hole 141 has a fixed angle to a contact welding surface of the contacts welded on the contact bridge 104.
- the angle may be optimized by calculation so as to keep balance of contact pressure applied to the contacts on both sides.
- the outer profile of the contact bridge 104 has two second curved faces 142 which are centrally symmetric.
- the second curved faces 142 match with the first curved faces 116 on the irregular through hole 114, the first curved face 116 fits in the second curved face 142 with small clearance.
- Figs 4a, 4b and 4c illustrate the first connection member of the rotary dual breakpoint moving contact module according to an embodiment of the present invention.
- the first connection member 102 is mounted within the two semicircle slot holes 113 which are axial concentric.
- the first connection member 112 slides within the second recesses 115 using the semicircle slot hole 113 as the rotation center.
- the angle of rotation of the first connection member 102 is limited by the length of the second recess 115.
- the first connection member 102 has a second through hole 121 and a convex short shaft 120 on both sides.
- the short shaft 120 matches with the semicircle slot hole 113.
- the second through hole 121 matches with the second shaft 106.
- a plane thickness of the first connection member 102 is not larger than a depth of the second recess 115, so that the second recesses 115 can effectively limit the movement range of the first connection member 102.
- the outer profile of the first connection member 102 does not influence the rotation of itself within a range.
- Figs. 5a and 5b illustrate the second connection member of the rotary dual breakpoint moving contact module according to an embodiment of the present invention.
- the second connection member 103 has a third through hole 130 and a fourth through hole 131 on both ends, the third through hole 130 matches with the second shaft 106, the fourth through hole 131 matches with the third shaft 107.
- the first shaft 105 crosses through the first through hole 110 of the rod-shaped block rotor 101 and the slotted hole 141 of the contact bridge 104 along the axial direction of the rod-shaped block rotor 101.
- the first shaft 105 fits in the first through hole 110 and the slotted hole 141 with small clearance.
- Two second shafts 106 which are disposed in a centrally symmetric manner, cross through the second though hole 121 of the first connection member 102 and the third through hole 130 of the second connection member 103 along the axial direction of the rod-shaped block rotor 101.
- the contact spring 108 is suspended on two second shafts 106 which are centrally symmetric.
- the contact spring 108 moves within the first recess 111 on both axial sides of the rod-shaped block rotor 101.
- the third shafts 107 are disposed in a centrally symmetric manner and cross through the fourth through hole 131 of the second connection member 103 and the fifth through hole 140 of the contact bridge 104 along the axial direction of the rod-shaped block
- Figs. 6 ⁇ 10 illustrate the working process of the rotary dual breakpoint moving contact module according to an embodiment of the present invention.
- Fig. 6 illustrates the structural view at an opening position or a tripping position
- Fig. 7 illustrates the structural view at a closing position
- Fig. 8 illustrates the structural view at a dead point
- Fig. 9 illustrates the structural view at a maximum open position
- Fig. 10 illustrates the structural view at an imbalanced stress position.
- connection members perform counterclockwise rotation under the action of the spring force of the contact springs.
- the force is transferred to the first connection member through the first shaft and drives the first connection member to perform counterclockwise rotation.
- the first connection member, the second connection member and the contact bridge form a four-member connection mechanism, which enables the force to further drive the contact bridge to perform counterclockwise rotation.
- the second curved faces of the contact bridge touch and rely on the first curved faces of the rod-shaped block rotor finally.
- the rotary dual breakpoint moving contact module maintains the status as show in Fig. 6 .
- connection members perform counterclockwise rotation under the action of the spring force of the contact springs.
- the force is transferred to the first connection member through the first shaft and drives the first connection member to perform counterclockwise rotation.
- the first connection member, the second connection member and the contact bridge form a four-member connection mechanism, which enables the force to further drive the contact bridge to perform counterclockwise rotation.
- the moving contacts on the contact bridges touch the static contacts finally, the rotary dual breakpoint moving contact module maintains the status as show in Fig. 7 .
- the rotary dual breakpoint moving contact module of the present invention is able to realize large current short circuit breaking of rotary dual breakpoint moving contacts, the moving contacts may open quickly and rebound of the moving contacts is prevented, and the contact pressure on two contact points is balanced.
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- Breakers (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Fuses (AREA)
Abstract
Description
- The present invention relates to contact module of circuit breaker, more particularly, relates to rotary dual breakpoint moving contact module in operation mechanism of circuit breaker.
- Dual breakpoint structure is a trend of modern molded case circuit breakers. As an important component of the molded case circuit breaker, contact modules has drawn great attention. Modern molded case circuit breakers with high breaking ability generally use rotary dual breakpoint moving contact structures, which are of various forms. Some of the conventional rotary moving contact structures have additional functions, the additional functions mainly include automatic lock of the moving contact after opening by electrodynamic repulsion force, so as to prevent rebound of the moving contact. The present invention provides a rotary dual breakpoint moving contact module having a different structure with the traditional products. A repulsion and lock apparatus with a simple structure, high reliability and less components is provided. When a contact bridge is opened to a relatively small angle by electrodynamic repulsion force, the apparatus may quickly lock the contact bridge at a limit position of a clearance distance of open contacts. Another problem that must be solved by the rotary dual breakpoint moving contact structure is to keep balance of the contact pressure applied to the contacts on both sides. The present invention is able to significantly improve the balance between the contact pressure on both sides, while both contact pressure satisfy the desire pressure requirements. The present invention also provides a spring protection mechanism to prevent the spring from damage caused by arc or metal particles.
- The Chinese patent application with a publication number of
CN101320659A , and an application number of200810040543.0 - The contact bridge of the rotary dual breakpoint structure disclosed in the above patent application uses a slide block mechanism rather than a connection member. The mechanical movement trajectory of the slide block mechanism and the connection member mechanism are completely different. The slide block mechanism may cause sliding friction which may influence the moving flexibility. Further, the rod-shaped block rotor of the above application has a plurality of assembly holes, which may increase the complexity of the assemble procedure due to more assembly procedures.
- The present invention discloses a rotary dual breakpoint moving contact module with a new structure, which is used in a contact module of molded case circuit breaker. The present invention is able to realize large current short circuit breaking of rotary dual breakpoint moving contacts. The moving contacts may open quickly and rebound of the moving contacts is prevented, and the contact pressure on two contact points is balanced.
- According to an embodiment of the present invention, a rotary dual breakpoint moving contact module is provided, the rotary dual breakpoint moving contact module comprises:
- a rod-shaped block rotor, the rod-shaped block rotor is single phase independent and has a first through hole at the center, a first shaft is mounted in the first through hole, the rod-shaped block rotor has a first recess on each axial side face, a contact spring is mounted in each first recess, the contact spring is able to move within a range defined by the first recess;
- a first connection member, the first connection member is mounted on the rod-shaped block rotor, second shaft goes through the first connection member;
- a second connection member, the second shaft and a third shaft goes through the second connection member respectively;
- a contact bridge, the contact bridge crosses through the rod-shaped block rotor, the outer profile of the contact bridge is centrally symmetric, the first shaft and the third shaft go through the contact bridge respectively, contacts are welded to the end points on both sides of the contact bridge.
- According to an embodiment, the rod-shaped block rotor has two linkage holes and two semicircle slot holes on each axial side face, the two linkage holes are symmetric along the center of the rod-shaped rotor, the two semicircle slot holes are symmetric along the center of the rod-shaped rotor, a fixed angle is between a line connecting the geometric centers of the two linkage holes on a same axial side face and a line connecting the geometric centers of the two semicircle slot holes on the same axial side face, the linkage holes on different axial side faces are axial concentric, and the semicircle slot holes on different axial side faces are axial concentric. The rod-shaped block rotor has an irregular through hole in radial direction, the width of the irregular through hole allows the contact bridge to cross through, the rod-shaped block rotor also has second recesses in radial direction, each second recess surrounds a semicircle slot hole.
- According to an embodiment, the irregular through hole has two first curved faces which are centrally symmetric, the first curved faces match with the outer profile of the contact bridge to define an initial pressure position and a maximum open position of the contact bridge.
- According to an embodiment, the outer profile of the contact bridge has two second curved faces which are centrally symmetric, the second curved faces match with the first curved faces.
- According to an embodiment, the first connection member is mounted within the two semicircle slot holes which are axial concentric, the first connection member slides within the second recesses using the semicircle slot hole as the rotation center, the angle of rotation of the first connection member is limited by the length of the second recess.
- According to an embodiment, the first connection member has a second through hole and a convex short shaft on both sides, the short shaft matches with the semicircle slot hole, the second through hole matches with the second shaft. A plane thickness of the first connection member is not larger than a depth of the second recess.
- According to an embodiment, the second connection member has a third through hole and a fourth through hole on both ends, the third through hole matches with the second shaft, the fourth through hole matches with the third shaft.
- According to an embodiment, the contact bridge has two fifth through holes which are centrally symmetric, the third shaft is mounted within the fifth holes. The contact bridge has a slotted hole at the center, the first shaft passed through the slotted hole and is able to slide within the slotted hole along the longitudinal direction, the longitudinal direction of the slotted hole has a fixed angle to a contact welding surface of the contacts welded on the contact bridge.
- According to an embodiment, the contact spring is suspended on two second shafts which are centrally symmetric, and moves within the first recess on the rod-shaped block rotor.
- The rotary dual breakpoint moving contact module of the present invention is able to realize large current short circuit breaking of rotary dual breakpoint moving contacts. The moving contacts may open quickly and rebound of the moving contacts is prevented, and the contact pressure on two contact points is balanced.
- The above and other features, natures, and advantages of the invention will be apparent by the following description of the embodiments incorporating the drawings, wherein,
-
Figs. 1a, 1b, 1c, 1d and 1e illustrate the assembly structure of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. -
Figs. 2a and 2b illustrate the contact bridge of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. -
Figs. 3a, 3b, 3c and 3d illustrate the rod-shaped block rotor of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. -
Figs 4a, 4b and 4c illustrate the first connection member of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. -
Figs. 5a and 5b illustrate the second connection member of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. -
Fig. 6 illustrates the structural view of the rotary dual breakpoint moving contact module at an opening position or a tripping position according to an embodiment of the present invention. -
Fig. 7 illustrates the structural view of the rotary dual breakpoint moving contact module at a closing position according to an embodiment of the present invention. -
Fig. 8 illustrates the structural view of the rotary dual breakpoint moving contact module at a dead point according to an embodiment of the present invention. -
Fig. 9 illustrates the structural view of the rotary dual breakpoint moving contact module at a maximum open position according to an embodiment of the present invention. -
Figs. 10a and 10b illustrate the structural view of the rotary dual breakpoint moving contact module at an imbalanced stress position according to an embodiment of the present invention. - The present invention discloses a rotary dual breakpoint moving contact module.
Figs. 1∼10 illustrate a rotary dual breakpoint moving contact module according to an embodiment of the present invention. The rotary dual breakpoint moving contact module comprises a rod-shaped block rotor 101, afirst connection member 102, asecond connection member 103, acontact bridge 104, afirst shaft 105,second shafts 106, athird shaft 107 andcontact springs 108. - The rod-
shaped block rotor 101 is single-phase independent. The rod-shaped block rotor 101 has a first throughhole 110 at the center. Thefirst shaft 105 is mounted in the first throughhole 110. The rod-shapedblock rotor 101 has afirst recess 111 on each axial side face. Thecontact spring 108 is mounted in eachfirst recess 111. Thecontact spring 108 is able to move within a range defined by thefirst recess 111. - The
first connection member 102 is mounted on the rod-shapedblock rotor 101. Thesecond shaft 106 goes through thefirst connection member 102. - The
second shaft 106 and thethird shaft 107 goes through thesecond connection member 103 respectively. - The
contact bridge 104 crosses through the rod-shapedblock rotor 101. The outer profile of thecontact bridge 104 is centrally symmetric. Thefirst shaft 105 and thethird shaft 107 go through thecontact bridge 104 respectively. Contacts are welded to the end points on both sides of thecontact bridge 104. -
Figs. 3a, 3b, 3c and 3d illustrate the rod-shaped block rotor of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. On each axial side face of the rod-shapedblock rotor 101, there are twolinkage holes 112 and two semicircle slot holes 113. The twolinkage holes 112 are symmetric along the center of the rod-shaped rotor, and the two semicircle slot holes 113 are also symmetric along the center of the rod-shaped rotor. There are fourlinkage holes 112 in total and four semicircle slot holes 113 in total. A fixed angle is between a line connecting the geometric centers of the twolinkage holes 112 on a same axial side face and a line connecting the geometric centers of the two semicircle slot holes 113 on the same axial side face. The linkage holes 112 on different axial side faces are axial concentric, and the semicircle slot holes 113 on different axial side faces are also axial concentric. The rod-shapedblock rotor 101 has an irregular throughhole 114 in radial direction. The width of the irregular throughhole 114 allows thecontact bridge 104 to cross through. The irregular throughhole 114 has two firstcurved faces 116 which are centrally symmetric. The firstcurved faces 116 match with the outer profile of thecontact bridge 104 to define an initial pressure position and a maximum open position of thecontact bridge 104. The rod-shapedblock rotor 101 also hassecond recesses 115 in radial direction. Eachsecond recess 115 surrounds asemicircle slot hole 113. The total number of thesecond recesses 115 is also four. -
Figs. 2a and 2b illustrate the contact bridge of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. Thecontact bridge 104 has two fifth throughholes 140 which are centrally symmetric. Thethird shaft 107 is mounted within the fifth holes 140. Thethird shaft 107 fits in thefifth holes 140 with small clearance. Thecontact bridge 104 has a slottedhole 141 at the center. Thefirst shaft 105 passes through the slottedhole 141. Thefirst shaft 105 fits in the slottedhole 141 with small clearance and is able to slide within the slottedhole 141 along the longitudinal direction. The longitudinal direction of the slottedhole 141 has a fixed angle to a contact welding surface of the contacts welded on thecontact bridge 104. The angle may be optimized by calculation so as to keep balance of contact pressure applied to the contacts on both sides. The outer profile of thecontact bridge 104 has two secondcurved faces 142 which are centrally symmetric. The secondcurved faces 142 match with the first curved faces 116 on the irregular throughhole 114, the firstcurved face 116 fits in the secondcurved face 142 with small clearance. -
Figs 4a, 4b and 4c illustrate the first connection member of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. Thefirst connection member 102 is mounted within the two semicircle slot holes 113 which are axial concentric. Thefirst connection member 112 slides within thesecond recesses 115 using thesemicircle slot hole 113 as the rotation center. The angle of rotation of thefirst connection member 102 is limited by the length of thesecond recess 115. Thefirst connection member 102 has a second throughhole 121 and a convexshort shaft 120 on both sides. Theshort shaft 120 matches with thesemicircle slot hole 113. The second throughhole 121 matches with thesecond shaft 106. A plane thickness of thefirst connection member 102 is not larger than a depth of thesecond recess 115, so that thesecond recesses 115 can effectively limit the movement range of thefirst connection member 102. The outer profile of thefirst connection member 102 does not influence the rotation of itself within a range. -
Figs. 5a and 5b illustrate the second connection member of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. Thesecond connection member 103 has a third throughhole 130 and a fourth throughhole 131 on both ends, the third throughhole 130 matches with thesecond shaft 106, the fourth throughhole 131 matches with thethird shaft 107. - The
first shaft 105 crosses through the first throughhole 110 of the rod-shapedblock rotor 101 and the slottedhole 141 of thecontact bridge 104 along the axial direction of the rod-shapedblock rotor 101. Thefirst shaft 105 fits in the first throughhole 110 and the slottedhole 141 with small clearance. Twosecond shafts 106, which are disposed in a centrally symmetric manner, cross through the second thoughhole 121 of thefirst connection member 102 and the third throughhole 130 of thesecond connection member 103 along the axial direction of the rod-shapedblock rotor 101. Thecontact spring 108 is suspended on twosecond shafts 106 which are centrally symmetric. Thecontact spring 108 moves within thefirst recess 111 on both axial sides of the rod-shapedblock rotor 101. Thethird shafts 107 are disposed in a centrally symmetric manner and cross through the fourth throughhole 131 of thesecond connection member 103 and the fifth throughhole 140 of thecontact bridge 104 along the axial direction of the rod-shapedblock rotor 101. -
Figs. 6∼10 illustrate the working process of the rotary dual breakpoint moving contact module according to an embodiment of the present invention. WhereinFig. 6 illustrates the structural view at an opening position or a tripping position,Fig. 7 illustrates the structural view at a closing position,Fig. 8 illustrates the structural view at a dead point,Fig. 9 illustrates the structural view at a maximum open position,Fig. 10 illustrates the structural view at an imbalanced stress position. - At an opening position of the circuit breaker, the connection members perform counterclockwise rotation under the action of the spring force of the contact springs. The force is transferred to the first connection member through the first shaft and drives the first connection member to perform counterclockwise rotation. The first connection member, the second connection member and the contact bridge form a four-member connection mechanism, which enables the force to further drive the contact bridge to perform counterclockwise rotation. The second curved faces of the contact bridge touch and rely on the first curved faces of the rod-shaped block rotor finally. The rotary dual breakpoint moving contact module maintains the status as show in
Fig. 6 . - At a re-lock position of the circuit breaker, the status is the same as that of the opening position, the descriptions will not be repeated.
- At a closing position of the circuit breaker, the connection members perform counterclockwise rotation under the action of the spring force of the contact springs. The force is transferred to the first connection member through the first shaft and drives the first connection member to perform counterclockwise rotation. The first connection member, the second connection member and the contact bridge form a four-member connection mechanism, which enables the force to further drive the contact bridge to perform counterclockwise rotation. The moving contacts on the contact bridges touch the static contacts finally, the rotary dual breakpoint moving contact module maintains the status as show in
Fig. 7 . - The rotary dual breakpoint moving contact module of the present invention is able to realize large current short circuit breaking of rotary dual breakpoint moving contacts, the moving contacts may open quickly and rebound of the moving contacts is prevented, and the contact pressure on two contact points is balanced.
- The above embodiments are provided to those skilled in the art to realize or use the invention, under the condition that various modifications or changes being made by those skilled in the art without departing the spirit and principle of the invention, the above embodiments may be modified and changed variously, therefore the protection scope of the invention is not limited by the above embodiments, rather, it should conform to the maximum scope of the innovative features mentioned in the Claims.
Claims (9)
- A rotary dual breakpoint moving contact module, characterized in comprising:a rod-shaped block rotor, wherein the rod-shaped block rotor is single-phase independent and has a first through hole at the center, a first shaft is mounted in the first through hole, the rod-shaped block rotor has a first recess on each axial side face, a contact spring is mounted in each first recess, the contact spring is able to move within a range defined by the first recess;a first connection member mounted on the rod-shaped block rotor, wherein a second shaft goes through the first connection member;a second connection member, wherein the second shaft and a third shaft goes through the second connection member respectively;a contact bridge, crossing through the rod-shaped block rotor, wherein the outer profile of the contact bridge is centrally symmetric, the first shaft and the third shaft go through the contact bridge respectively, and contacts are welded to end points on both sides of the contact bridge.
- The rotary dual breakpoint moving contact module according to claim 1, characterized in that,
the rod-shaped block rotor has two linkage holes and two semicircle slot holes on each axial side face, the two linkage holes are symmetric along the center of the rod-shaped rotor, the two semicircle slot holes are symmetric along the center of the rod-shaped rotor, wherein a fixed angle is between a line connecting the geometric centers of the two linkage holes on a same axial side face and a line connecting the geometric centers of the two semicircle slot holes on the same axial side face, wherein the linkage holes on different axial side faces are axial concentric, and the semicircle slot holes on different axial side faces are axial concentric;
the rod-shaped block rotor has an irregular through hole in radial direction, the width of the irregular through hole allows the contact bridge to cross through, the rod-shaped block rotor also has second recesses in radial direction, each second recess surrounds a semicircle slot hole. - The rotary dual breakpoint moving contact module according to claim 2, characterized in that,
the irregular through hole has two first curved faces which are centrally symmetric, the first curved faces match with the outer profile of the contact bridge to define an initial pressure position and a maximum open position of the contact bridge. - The rotary dual breakpoint moving contact module according to claim 3, characterized in that,
the outer profile of the contact bridge has two second curved faces which are centrally symmetric, the second curved faces match with the first curved faces. - The rotary dual breakpoint moving contact module according to claim 2, characterized in that,
the first connection member is mounted within the two semicircle slot holes which are axial concentric, the first connection member slides within the second recesses using the semicircle slot hole as a rotation center, the angle of rotation of the first connection member is limited by the length of the second recess. - The rotary dual breakpoint moving contact module according to claim 5, characterized in that,
the first connection member has a second through hole and a convex short shaft on both sides of the first connection member, wherein the short shaft matches with the semicircle slot hole and the second through hole matches with the second shaft;
a plane thickness of the first connection member is not larger than a depth of the second recess. - The rotary dual breakpoint moving contact module according to claim 1, characterized in that,
the second connection member has a third through hole and a fourth through hole on both ends of the second connection member, wherein the third through hole matches with the second shaft and the fourth through hole matches with the third shaft. - The rotary dual breakpoint moving contact module according to claim 1, characterized in that,
the contact bridge has two fifth through holes which are centrally symmetric, the third shaft is mounted within the fifth holes;
the contact bridge has a slotted hole at the center, the first shaft passed through the slotted hole and is able to slide within the slotted hole along the longitudinal direction, the longitudinal direction of the slotted hole has a fixed angle to a welding surface of the contacts welded on the contact bridge. - The rotary dual breakpoint moving contact module according to claim 1, characterized in that,
the contact spring is suspended on two second shafts which are centrally symmetric, and moves within the first recess on the rod-shaped block rotor.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110310339.8A CN103050344B (en) | 2011-10-13 | 2011-10-13 | Rotation double-breakpoint movable contact module |
PCT/CN2012/081807 WO2013053283A1 (en) | 2011-10-13 | 2012-09-24 | Rotation double-breakpoint movable contact module |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2768005A1 true EP2768005A1 (en) | 2014-08-20 |
EP2768005A4 EP2768005A4 (en) | 2015-08-05 |
EP2768005B1 EP2768005B1 (en) | 2016-12-21 |
Family
ID=48062950
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12840034.8A Active EP2768005B1 (en) | 2011-10-13 | 2012-09-24 | Rotation double-breakpoint movable contact module |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2768005B1 (en) |
CN (1) | CN103050344B (en) |
BR (1) | BR112014008569B1 (en) |
ES (1) | ES2619710T3 (en) |
MY (1) | MY170441A (en) |
WO (1) | WO2013053283A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160233043A1 (en) * | 2013-09-24 | 2016-08-11 | Seari Electric Technology Co., Ltd. | Rotating dual break point contact |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108648969B (en) * | 2018-06-28 | 2023-12-01 | 美高电气科技有限公司 | Double-breakpoint miniature circuit breaker |
CN110176367B (en) * | 2019-05-15 | 2021-06-22 | 深圳市泰永电气科技有限公司 | Double-breakpoint change-over switch and moving contact module thereof |
CN114464507A (en) * | 2022-01-28 | 2022-05-10 | 江苏辉能电气有限公司 | Double-breakpoint contact rotating device and circuit breaker |
Family Cites Families (8)
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US6114641A (en) * | 1998-05-29 | 2000-09-05 | General Electric Company | Rotary contact assembly for high ampere-rated circuit breakers |
US6084489A (en) * | 1998-09-08 | 2000-07-04 | General Electric Company | Circuit breaker rotary contact assembly locking system |
US6403909B1 (en) * | 2000-03-13 | 2002-06-11 | General Electric Company | Trip override for rotary breaker |
DE102004059407B4 (en) * | 2004-12-09 | 2007-02-08 | Ge Power Controls Gmbh & Co. Kg | Switch shaft unit for a switch |
CN101114556B (en) * | 2007-04-29 | 2010-06-09 | 上海电科电器科技有限公司 | Circuit breaker rotating dual-breakpoint contact system and spring protection structure |
CN101320659B (en) * | 2008-07-14 | 2012-03-28 | 上海电科电器科技有限公司 | Rotating double-breakpoint structure of plastic case breaker |
CN201397785Y (en) * | 2009-05-11 | 2010-02-03 | 江苏辉能电气有限公司 | Rotary double breakpoint structure of contact of low-voltage breaker |
CN102103948A (en) * | 2009-12-16 | 2011-06-22 | 上海电器股份有限公司人民电器厂 | Moving contact assembly of molded case circuit breaker |
-
2011
- 2011-10-13 CN CN201110310339.8A patent/CN103050344B/en active Active
-
2012
- 2012-09-24 WO PCT/CN2012/081807 patent/WO2013053283A1/en active Application Filing
- 2012-09-24 MY MYPI2014001051A patent/MY170441A/en unknown
- 2012-09-24 BR BR112014008569-2A patent/BR112014008569B1/en active IP Right Grant
- 2012-09-24 EP EP12840034.8A patent/EP2768005B1/en active Active
- 2012-09-24 ES ES12840034.8T patent/ES2619710T3/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20160233043A1 (en) * | 2013-09-24 | 2016-08-11 | Seari Electric Technology Co., Ltd. | Rotating dual break point contact |
US9837233B2 (en) * | 2013-09-24 | 2017-12-05 | Seari Electric Technology Co., Ltd. | Rotating dual break point contact |
Also Published As
Publication number | Publication date |
---|---|
EP2768005A4 (en) | 2015-08-05 |
BR112014008569B1 (en) | 2020-12-15 |
CN103050344A (en) | 2013-04-17 |
ES2619710T3 (en) | 2017-06-26 |
MY170441A (en) | 2019-07-31 |
EP2768005B1 (en) | 2016-12-21 |
WO2013053283A1 (en) | 2013-04-18 |
BR112014008569A2 (en) | 2017-04-18 |
CN103050344B (en) | 2015-01-21 |
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