CN1750206A - Movable contact assembly of circuit breaker for wiring - Google Patents
Movable contact assembly of circuit breaker for wiring Download PDFInfo
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- CN1750206A CN1750206A CNA2005100655540A CN200510065554A CN1750206A CN 1750206 A CN1750206 A CN 1750206A CN A2005100655540 A CNA2005100655540 A CN A2005100655540A CN 200510065554 A CN200510065554 A CN 200510065554A CN 1750206 A CN1750206 A CN 1750206A
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- Prior art keywords
- mobile contactor
- fixed contact
- rotating shaft
- shaft rod
- contact
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/04—Continuous barriers extending along roads or between traffic lanes essentially made of longitudinal beams or rigid strips supported above ground at spaced points
Abstract
Disclosed is a movable contactor assembly of a circuit breaker capable of enhancing a current limiting function by maintaining a contact state between a movable contactor and fixed contactors in a closed circuit state, by preventing the separated movable contactor from returning towards the fixed contactors at the time of a current limiting operation, by accelerating a separation operation of the movable contactor from the fixed contactors at the time of a current limiting operation, and by continuously maintaining a separated state of the movable contactor from the fixed contactors until a trip operation is performed by a trip mechanism.
Description
Technical field
The present invention relates to a kind of movably contactor assembly that is used for circuit-breaker, and more specifically say, relate to a kind of movably contactor assembly that is used for circuit-breaker, its assembly by improving mobile contactor and supporting the rotating shaft rod of this mobile contactor can strengthen current limiting performance.
Background technology
Usually, circuit-breaker is installed in the power supply distribution panelboard place between some power supply systems of factory and building.Circuit-breaker is as switch; be used under no-load condition, providing or being cut to the power supply of load-side; and under load condition when providing power supply, with the circuit and the element of protection load-side to load-side because the intense anomaly electric current of short circuit or earth fault cuts off when flowing through circuit from supply side.
Fig. 1 is the in-built sectional view that illustrates according to the circuit-breaker of prior art, and Fig. 2 is the front view according to the mobile contactor assembly of the circuit-breaker of prior art, it shows closed circuit state, and Fig. 3 is that it illustrates open-circuit condition according to the front view of the movably contactor assembly of the circuit-breaker of prior art.
As shown, circuit-breaker 1 comprises: die box (mold case) 10; Fixed contact 20 and 30, it is installed in the die box 10 with preset distance; Mobile contactor assembly 40, it is placed between fixed contact 20 and 30; Tripping mechanism 50, it is used for by detecting big electric current is the circuit-breaker tripping operation; Switching mechanism 60, it is operated automatically by tripping mechanism 50 or by shift bar 11 manual operations, is used for mobile contactor 41 is separated with 30 with fixed contact 20, thereby cuts off circuit; And arc-extinguishing mechanism (arc extinguishing) 70, it is used to extinguish between the contact 41a that is created in mobile contactor 41 when commutation circuit and the 41b and the arcing gas of the high temperature and high pressure between the contact 21 and 31 of fixed contact 20 and 30.
Die box 10 provides said mechanism therein, and is formed by insulating material, with the mechanism of insulation phase place, and prevents to be introduced into die box 10 such as the foreign material of dust.
At fixed contact, just, supply side fixed contact 20 and load-side fixed contact 30 provide contact 21 and contact 31 respectively at its end.Two ends of mobile contactor 41 all provide contact 41b.
Mobile contactor 40 comprises: mobile contactor 41, and it is placed between fixed contact 20 and 30 with rotary way, is used to be kept closed or off-state; Rotating shaft rod (shaft) 43, it is placed between fixed contact 20 and 30, is used to support mobile contactor 41; With a pair of spring 45 and 47, other end 45b and 47b that it has the end 45a of mobile contactor of being fixed to 41 and 47a respectively and is fixed to rotating shaft rod 43, be used for by when since short circuit or earth fault when making big electric current stream on circuit in the contact 21, the electromagnetic repulsive force that produces of 41b, 31 places is that mobile contactor 41 is rotated with elastic type in the center around empty rotation axis 43a.Be used for mobile contactor 41 rotating shaft rod 43 people's methods that to be supported to around empty rotation axis 43a be the center are called self-centering.
As shown in Figure 2, the contact 21 of the contact 41b of mobile contactor 41 and fixed contact 20 and 30 and 31 state of contact are called " closed circuit state ".As shown in Figure 3, the contact 41b of mobile contactor 41 is called " open circuit state " with the state that separate with 31 fixed contact 20 and 30 contact 21.Equally, conversion closed circuit state to open circuit state is called " separating and disconnection ".
As shown in Figure 3, when the big electric current owing to short circuit or earth fault flows on circuit, electromagnetic repulsive force between the contact 21 and 31 of the contact 41a of mobile contactor 41 and 41b and fixed contact 20 and 30 separates with fixed contact 20 mobile contactor 41 with 30, thereby has rotating torque.Therefore, mobile contactor 41 overcomes the elastic force of spring 45 and 47, and rotates in the clockwise direction, thereby cuts off circuit.Unaccounted reference number 49 indicates the brake of the slewing area that is used to limit mobile contactor.
The mobile contactor assembly of conventional circuit-breaker has following problem.When mobile contactor 41 and fixed contact 20 when 30 separate, the empty rotation axis 43a of mobile contactor 41 is unsettled, so its fluctuation that causes producing mobile contactor 41 with right and up and down direction on a left side.Equally, when mobile contactor 41 and fixed contact 20 when 30 separate, spring 45 and 47 elastic-restoring force increase, and thus mobile contactor 41 since this restoring force become once more and contact with 30 with fixed contact 20.Contact again when this makes and to cause short circuit by electromagnetic repulsive force between the contact and separating again therebetween, thus electric arc produced continuously.Therefore, do not obtain instant current limiting characteristic, and can cause grievous injury circuit-breaker and load equipment.
Summary of the invention
Therefore, the mobile contactor assembly that the purpose of this invention is to provide a kind of circuit-breaker, it can prevent to return and this fixed contact state of contact from the mobile contactor that fixed contact separates effectively, and can quicken the separation of mobile contactor from fixed contact in open circuit state.
Another object of the present invention provides a kind of mobile contactor assembly of circuit-breaker, and it can keep state that mobile contactor separates from fixed contact up to carrying out trip operation by tripping mechanism.
Another object of the present invention provides a kind of mobile contactor assembly of circuit-breaker, and it can stably be maintained fixed the contact condition between the contact of the contact of contactor and mobile contactor in the closed circuit state.
Another object of the present invention provides a kind of mobile contactor assembly of circuit-breaker, even it can be when not installing rotation axis, with concentric manner (concentrically) structure rotating shaft rod and mobile contactor, even and can prevent that also the mobile contactor of rotating is subjected to the interference of spring in that rotation axis is installed when current limliting is operated.
Another object of the present invention provides a kind of mobile contactor assembly of circuit-breaker, and it can simply and apace be assembled to rotating shaft rod with spring by two side surface mounting spring at rotating shaft rod.
Another object of the present invention provides a kind of mobile contactor assembly of circuit-breaker, even it can be at upper and lower fixed contact accurately under the situation about the mobile contactor symmetry, by will be used for forming vertical slotted hole at the mobile contactor place, keep the contact pressure between mobile contactor and the fixed contact equably through the rotational axis hole of rotation axis.
For realizing these purposes and other advantages, and according to purpose of the present invention, as describing widely and particularly at this, the mobile contactor assembly of the circuit-breaker that provides comprises:
Rotating shaft rod provides the opening that is used for the independent rotation of permission mobile contactor when current limliting is operated and have the cam face that is used for supporting with rotary way this mobile contactor on its external peripheral surface;
Mobile contactor, it is supported with rotary way by this rotating shaft rod, and this mobile contactor has the contact symmetrically to right with the linear movement guide groove at its two ends, and can turn to the contact position of fixed contact or from the separation point position of fixed contact;
Sliding pin is right, it is arranged as two sides crossing over rotating shaft rod, but its linear movement in the linear movement guide groove, and the contact condition of the cam face of maintenance and rotating shaft rod under mobile contactor and fixed contact state of contact, be used in mobile contactor when fixed contact separates with the current limliting operation of rotating, by separating from cam face and, providing pressure from the direction that fixed contact separates to mobile contactor in the acceleration mobile contactor thus along the external peripheral surface slip of rotating shaft rod; With
Spring, be used to sliding pin that elastic force is provided, make and under mobile contactor and fixed contact state of contact, can keep contacting between this mobile contactor and this fixed contact, and be used for operating when current limliting, being mobile contactor separates and when rotating with static rotating shaft rod rightabout from fixed contact, is quickening to provide elastic force for sliding pin on the direction that mobile contactor separates from fixed contact.
Aforesaid and other purposes, feature, aspect and advantage will be below become more apparent in conjunction with the accompanying drawings the specific descriptions of the present invention.
Description of drawings
Accompanying drawing is a part that comprises in order further to understand the present invention and be included into this specification of formation in this specification, and these accompanying drawings show embodiments of the invention, and are used for this specification principle of the present invention being described.
In the accompanying drawing:
Fig. 1 shows the in-built sectional view according to the circuit-breaker of prior art;
Fig. 2 is the front view according to the mobile contactor assembly that is used for circuit-breaker of prior art, and it illustrates the state (closed circuit state) that the contact contacts with each other;
Fig. 3 is that it illustrates contact state separated from one another (open circuit state) according to the front view of the mobile contactor assembly that is used for circuit-breaker of prior art;
Fig. 4 is the exploded view that illustrates according to the outward appearance of the mobile contactor assembly that is used for circuit-breaker of the first embodiment of the present invention;
Fig. 5 is the perspective view according to the mobile contactor assembly that is used for circuit-breaker of the first embodiment of the present invention, and it illustrates the state (closed circuit state) that the contact contacts with each other;
Fig. 6 is that it illustrates contact state separated from one another (open circuit state) according to the perspective view of the mobile contactor assembly that is used for circuit-breaker of the first embodiment of the present invention;
Fig. 7 is the front view according to the mobile contactor assembly that is used for circuit-breaker of the first embodiment of the present invention, and it illustrates the state (closed circuit state) that the contact contacts with each other;
Fig. 8 is that it illustrates contact state separated from one another (open circuit state) according to the front view of the mobile contactor assembly that is used for circuit-breaker of the first embodiment of the present invention;
Fig. 9 is the front view according to the mobile contactor assembly that is used for circuit-breaker of the first embodiment of the present invention, and it illustrates mobile contactor and finishes and keep open circuit state from the separation of fixed contact;
Figure 10 is the perspective view that the mobile contactor assembly that is used for circuit-breaker according to a second embodiment of the present invention is shown;
Figure 11 is the perspective view of the mobile contactor assembly that is used for circuit-breaker according to a second embodiment of the present invention, and it illustrates the state (closed circuit state) that the contact contacts with each other;
Figure 12 is the perspective view of following according to the mobile contactor assembly that is used for circuit-breaker of the second embodiment of the present invention, and it illustrates contact state separated from one another (open circuit state);
Figure 13 is the front view of the mobile contactor assembly that is used for circuit-breaker according to a second embodiment of the present invention, and it illustrates the state (closed circuit state) that the contact contacts with each other;
Figure 14 is the front view of the mobile contactor assembly that is used for circuit-breaker according to a second embodiment of the present invention, and it illustrates contact state separated from one another (open circuit state); With
Figure 15 is the front view of the mobile contactor assembly that is used for circuit-breaker according to a second embodiment of the present invention, and it illustrates finishes mobile contactor from the separation of fixed contact and the state of maintenance open circuit state.
Embodiment
To at length provide the reference of the preferred embodiments of the present invention below, the example illustrates in the accompanying drawings.
Hereinafter, will explain the mobile contactor assembly of circuit breaker in a circuit according to the invention with reference to figure 4 to Fig. 9.
As shown, the mobile contactor assembly 100 of circuit breaker comprises in a circuit according to the invention: rotating shaft rod 110, it has the opening 111 that is used for independent rotation mobile contactor 120 when current limliting is operated and is used for supporting removable 120 the cam face 113 that contacts with rotary way with having on its external peripheral surface, and this cam face 113 is used for supporting mobile contactor 120 with rotary way; Mobile contactor 120, it is supported with rotary way by rotating shaft rod 110, have symmetrically at its two ends the contact to 121 and the linear movement guide groove to 123, and be arranged to and turn to and fixed contact 20 and 30 contacted positions and the position of separating with 30 with fixed contact 20; Sliding pin is to 131, it is arranged as two side surfaces crossing over rotating shaft rod 110, in linear movement guide groove 123, can linearly move, and the contact condition of the cam face 113 of maintenance and rotating shaft rod 110 under mobile contactor 120 and fixed contact 20 and 30 contacted states, be used for when current limliting operation (being that mobile contactor 120 is separated to rotate with 30 from fixed contact 20), by separating from cam face 113 and, providing pressure from fixed contact 20 and 30 detaching directions to mobile contactor 120 in acceleration mobile contactor 120 thus along the external peripheral surface slip of rotating shaft rod 110; With spring 141 and 142, be used to sliding pin 131 that elastic force is provided, make and under mobile contactor 120 and fixed contact 20 and 30 contacted states, can keep contacting between mobile contactor 120 and fixed contact 20 and 30, and be used for providing elastic force for sliding pin 131, when fixed contact 20 separates with the current limliting of rotating operation with 30, to quicken mobile contactor 120 in mobile contactor 120 from fixed contact 20 and 30 separate at certain orientation.
More specifically, mobile contactor 120 is placed in supply side fixed contact 20 (left side is among Fig. 4) and load-side fixed contact 30 (the right is among Fig. 4).Fixed contact 20 and 30 is the current limliting type fixed contacts with end sections ( contact 21 and 31 is linked to this end parts), and this end parts is separately to power supply terminal (the power supply side line is connected to this power supply terminal) or face terminals (the load side line is connected to this face terminals) bending.Mobile contactor 120 has at longitudinal direction based on centrosymmetric shape, and provides each contact 121 at its two ends, thereby it is known as the double-contact type.
Two openings 111 of rotating shaft rod 110 form by penetrating by rotating shaft rod 110 in radial direction at a predetermined angle, make that the two ends of mobile contactor 120 can freely be rotated in opening 111 on the longitudinal direction.
As shown in Figure 4, rotating shaft rod 110 is the cylindrical axostylus axostyles that form two axostylus axostyles that are bonded to each other, and the cam face of rotating shaft rod 110 is mutually symmetrical on the external peripheral surface of rotating shaft rod 110 to 113.
Cam face 113 on the external peripheral surface of rotating shaft rod 110 is to be used to receive the surface of sliding pin 131 and comprise the first curved surfaces 113a, predetermined first radius that it has the center that derives from outside the rotating shaft rod 110 is used at the contact position assembling sliding pin 131 of mobile contactor 120 with fixed contact 20 and 30; With the second curved surfaces 113b, it has predetermined second radius at the center that forms in the autorotation axostylus axostyle 110, and is longer than first radius.Can revise cam face 113 to comprise a plurality of curved surfaces with a plurality of radiuses that form autorotation axostylus axostyle 110 inside or outside center.
Sliding pin 131 is crossed over the side surface of rotating shaft rod 110, to be installed in the linear movement guide groove 123.When current limliting is operated, sliding pin 131 sequentially passes through the first curved surfaces 113a and the second curved surfaces 113b of rotating shaft rod 110, thereby its external peripheral surface 115 along rotating shaft rod 110 is slided, and simultaneously, in the linear movement guide groove 123 of mobile contactor 120, carry out linear movement.
The depth D of linear movement guide groove 123 forms darker or equal than the depth d of cam face, separates with linear movement guide groove 123 so that prevent sliding pin 131.
Preferably, settle roller to 151 at the two ends of sliding pin 131 with rotary way in a longitudinal direction, to reduce the frictional force between sliding pin 131 and the rotating shaft rod 110.
When mobile contactor 120 be in fixed contact 20 when 30 contact, roller 151 is parked in the first curved surfaces 113a place of cam face 113.Equally, when mobile contactor 120 and the fixed contact 20 that rotates separate with the current limliting operation of rotating with 30, roller 151 is through the second curved surfaces 113b of cam face 113, slide with external peripheral surface 115, thereby reduce the friction between sliding pin 131 and the rotating shaft rod 110 and carry out level and smooth current limliting operation along rotating shaft rod 110.
On two side surfaces of mobile contactor 120, form steady pin to 122, to be mutually symmetrical based on center of rotation.
Two springs 141 and 142 are installed in each side surface of mobile contactor 120, and install symmetrically, make the one end to be supported and its other end can be supported by steady pin 122 by sliding pin 131.
In mobile contactor 120 and fixed contact 20 and 30 state of contact, just, under the closed circuit state, roller 151 contacts with the first curved surfaces 113a with the center outside rotating shaft rod 110.Equally, when mobile contactor 120 because the electromagnetic repulsive force of the big electric current on the circuit makes its rotation when the current limliting that fixed contact 20 separates with 30 is operated, just, when the contact is separated from one another, roller 151 sequentially moves to the first curved surfaces 113a and the second curved surfaces 113b, this second curved surfaces 113b has second radius that forms the described center in the autorotation axostylus axostyle 110 and be longer than first radius of the first curved surfaces 113a, and rolls on the external peripheral surface 115 of rotating shaft rod 110. Spring 141 and 142 provides elastic force as rotating torque by sliding pin 131 for mobile contactor 120, makes can to quicken mobile contactor 120 from fixed contact 20 and 30 separate.
What unaccounted reference number 155 was indicated is packing ring, and it is as the separator of roller 151 and mobile contactor 120 outer surfaces, to prevent the interruption owing to the roller 151 of the friction between roller 151 and mobile contactor 120 outer surfaces.
For ease of explaining, the mobile contactor assembly of a phase place is disclosed.The mobile contactor assembly of a phase place is disclosed.But, under the situation of leggy mobile contactor assembly, rotating shaft rod 110 can have elongate in shape, and it is connected with the rotating shaft rod of another phase place and is connected with the switching mechanism 12 of Fig. 1, makes the rotating shaft rod of some phase places to be rotated simultaneously by switching mechanism 12.
The mobile contactor 120 of the foregoing description is to be supported with the self-centering that is used for the pin 131 at support spring 141 and 142 two ends by spring 141 and 142, and does not need the central shaft of rotating shaft rod 110.But the two ends of mobile contactor 120 of the present invention can the central point of mobile contactor 120 supports by running through central shaft at longitudinal direction by rotating shaft rod 110.In the embodiment of this correction, be different from the prior art of Fig. 2 and Fig. 3, in current limliting operating period, when mobile contactor 120 from fixed contact 20 when 30 separate, central shaft is not interfered spring.Reason is as follows.In the prior art, two removable pin 45a and 47a move clockwise along the upper surface of mobile contactor 120, and simultaneously, move in the radial direction of these two pin 45b and 47b, with the other end of fixing spring 45 and 47.Therefore, spring also moves in radial direction, thus the interference of generation and central shaft.But, in the present invention, when current limliting operating period mobile contactor 120 from fixed contact 20 when 30 separate, thereby spring 141 and spring 142 parallel do not produce spring 141 and 142 and central shaft between the state of interference under, removable sliding pin 131 only carries out linear movement in linear movement guide groove 123.
Below with reference to the operation of Fig. 7 to Fig. 9 explanation according to the mobile contactor assembly of the circuit-breaker of first embodiment of the invention.
Fig. 7 is the front view according to the mobile contactor assembly of the circuit-breaker of first embodiment of the invention, and it illustrates the state (closed circuit state) that the contact contacts with each other.
As shown in Figure 7, under the state that contacts with each other in the contact, the sliding pin 131 that is connected to spring 141 and 142 produces anticlockwise rotating torque, just, rotates the power of mobile contactor 120 in the counterclockwise direction.Therefore, each contact 121 of mobile contactor 120 and fixed contact 20 contact with 31 with 30 contact 21.
Each roller 151 of sliding pin 131 contacts with the first curved surfaces 113a of the cam face 113 of rotating shaft rod 110.Under the closed circuit state, the electric current on the circuit is applied to the contact 21 of supply side fixed contact 20, passes through each contact 121 of mobile contactor 120, and flow to the face terminals (not shown) through the contact 31 of load-side fixed contact 30.
Fig. 8 is the front view according to the mobile contactor assembly of the circuit-breaker of first embodiment of the invention, and it illustrates the state (open circuit state) that the contact contacts with each other.
As shown in Figure 8, when making big electric current stream on circuit owing to short circuit or earth fault, between the contact 21 and 31 of each contact 121 of mobile contactor and fixed contact 20 and 30, produce electromagnetic repulsive force.Therefore, mobile contactor 120 is rotated in the direction of separating with 30 from fixed contact 20, just, and clockwise direction.Electromagnetic repulsive force is the power that rotates counterclockwise the rotating torque of mobile contactor 120 much larger than being used to of being produced by spring 141 and 142, and makes mobile contactor 120 clockwise rotate.Be placed in the roller 151 pulling springs 141 and 142 at each sliding pin 131 two ends, and simultaneously, on the second annular surface 113b of the cam face 113 of rotating shaft rod 110, roll, and move along the external peripheral surface 115 of rotating shaft rod 110 then.Just, when mobile contactor 120 clockwise rotates, be placed in the roller 151 pulling springs 141 and 142 at each sliding pin 131 two ends, and simultaneously, sequentially process has the first curved surfaces 113a at the center outside rotating shaft rod 110 and has the starting point (being called dead point) of the second annular surface 113b at the center in rotating shaft rod 110.When roller 151 during through these dead points, spring 141 is used to quicken the open circuit rotating torque that mobile contactor is separated from fixed contact with 142 elastic force from being used to that the contacted closed circuit rotating torque of mobile contactor and fixed contact is converted to.
Sliding pin 131 is in linear movement guide groove 123 linear motion, and the while, along the cam face 113 and external peripheral surface 115 slips of rotating shaft rod 110.But because the depth D of each linear movement guide groove 123 is deeper than or equals the depth d of the first annular surface 113a, this first annular surface 113a is the deep surface in cam face 113, and sliding pin 131 separates from linear movement guide groove 123.
Then, be installed in of cam face 113 separation of each roller 151 at sliding pin 131 places, and on external peripheral surface 115, roll by the mobile contactor 120 that clockwise rotates by electromagnetic repulsive force from rotating shaft rod 110.The elastic force that will impose on mobile contactor 120 through sliding pins 131 from spring 141 and 142 is used for open circuit rotating torque that mobile contactor 120 is separated with 30 from fixed contact 20 from being used for the closed circuit rotating torque that mobile contactor 120 is back to fixed contact 20 and 30 (counter clockwise direction of figure) is converted to, thereby acceleration mobile contactor 120 is from fixed contact 20 and 30 separate.
When the current limliting operation of being undertaken by mobile contactor assembly according to the present invention, mobile contactor is accelerated from the separation of fixed contact, thereby improves the current limliting operating function of circuit-breaker.
Fig. 9 is the front view that is used for according to the mobile contactor assembly of the circuit-breaker of the first embodiment of the present invention, and it illustrates has finished mobile contactor from the separation of fixed contact with remain on open circuit state.
As shown in Figure 9, maintenance rooved face 116 by rotating shaft rod 110 stops at the final position of the mobile contactor that clockwise rotates 120 under the open circuit state with roller 151, is back to the motion of fixed contact 20 and 30 or the open circuit state of maintenance mobile contactor 120 thereby postponed mobile contactor 120.
Just, when mobile contactor 120 reaches the position that is stopped by brake 49, by the maintenance rooved face 116 braking rollers 151 of rotating shaft rod 110.Therefore, mobile contactor 120 keeps open circuit state by the current limliting operation, unless manually the handle 11 of application drawing 1 is treated and fixed contact 20 and 30 contacted mobile contactor 120 so that external force is imposed on.
As mentioned above, in the mobile contactor assembly according to the circuit-breaker of first embodiment of the invention, the sliding pin that is used for the support spring two ends slides along cam face with first curved surfaces and second curved surfaces and external peripheral surface.Therefore, the elastic force that will be applied to mobile contactor by sliding pin from spring is used for open circuit rotating torque that mobile contactor is separated from fixed contact from being used for the closed circuit rotating torque that mobile contactor is returned fixed contact is converted to, thereby quickened mobile contactor 120 from fixed contact 20 and 30 separate and maximized current-limiting function.
Equally, in the final position that is rotated with the mobile contactor of separating from fixed contact, sliding pin is parked in the maintenance rooved face of rotating shaft rod, returns the motion of fixed contact or the released state of maintenance mobile contactor thereby postponed mobile contactor.Therefore, prevented that mobile contactor from returning fixed contact, and kept open circuit state to be extinguished and carry out trip operation by tripping mechanism up to electric arc.Explain the mobile contactor assembly of circuit-breaker according to a second embodiment of the present invention below with reference to Figure 10 to Figure 12.
As shown, the mobile contactor assembly 200 that is used for circuit-breaker according to the present invention comprises: rotating shaft rod 210, it has the opening 211 that is used for allowing independent rotation mobile contactor 220 when current limliting is operated, and on its external peripheral surface, have cam face 213, be used for supporting mobile contactor 220 with rotary way; Mobile contactor 220, it is placed between two side surfaces of rotating shaft rod 210 with rotary way, have at its two ends symmetrically the contact to 221 and the linear movement guide groove to 222, and be arranged to and turn to and fixed contact 20 and 30 position contacting or the position of separating with 30 from fixed contact 20; Sliding pin is to 251, it is arranged as two side surfaces crossing over rotating shaft rod 210, in linear movement guide groove 222, can move linearly, and under mobile contactor 220 and fixed contact 20 and 30 contacted states, contact the cam face 213 of rotating shaft rod 210, be used for when current limliting operation (being that mobile contactor 220 is separated to rotate with 30 from fixed contact 20), by separating from cam face 213 and, providing pressure from the direction that fixed contact 20 separates with 30 to mobile contactor 220 in acceleration mobile contactor 220 thus along the external peripheral surface slip of rotating shaft rod 210; With spring 241, it is used to provide elastic force to sliding pin 251, make and under mobile contactor 220 and fixed contact 20 and 30 contacted states, can keep contacting between mobile contactor 220 and fixed contact 20 and 30, and be used for providing elastic force to sliding pin 231, to separate with 30 and quicken mobile contactor 220 during the current limliting of rotating operation from fixed contact 20 from fixed contact 20 and 30 separate in mobile contactor 220 at certain orientation.
More specifically, mobile contactor 220 is placed in supply side fixed contact 20 (left side of Figure 10) and load-side fixed contact 30 (right side of Figure 10).Fixed contact 20 and 30 is the current limliting type fixed contacts with end sections ( contact 21 and 31 is linked to this end parts), and this end parts is separately to power supply terminal (the power supply side line is connected to this power supply terminal) and face terminals (the load side line is connected to this face terminals) bending.Mobile contactor 220 has at longitudinal direction based on centrosymmetric shape, and provides each contact 221 at its two ends, thereby it is known as the double-contact type.
Two openings 21 of rotating shaft rod 210 are being become to equal predetermined angle by opening in the radial direction, make the two ends of mobile contactor 220 can freely rotate in opening 211 in longitudinal direction.
Rotating shaft rod 210 is the cylindrical axostylus axostyles that form two axostylus axostyles that are bonded to each other, and the cam face of rotating shaft rod 210 is mutually symmetrical on the external peripheral surface of rotating shaft rod 210 to 223.
Cam face 213 on the external peripheral surface of rotating shaft rod 210 is to be used on the surface of mobile contactor 220 with the contact position assembling sliding pin 231 of fixed contact 20 and 30, and comprise: the first curved surfaces (not shown), it has predetermined first radius at the center that derives from outside the rotating shaft rod 210; With the second curved surfaces (not shown), it has predetermined second radius at the center that forms in the autorotation axostylus axostyle 210, and is longer than first radius.Can revise cam face 213 to comprise a plurality of curved surfaces with a plurality of radiuses that form autorotation axostylus axostyle 210 inside or outside center.
Sliding pin 231 is crossed over two side surfaces of rotating shaft rod 210, to be installed in the linear movement guide groove 223.When current limliting was operated, sliding pin 231 was through cam faces 213 and slide along the external peripheral surface 215 of rotating shaft rod 210 then, and simultaneously, carried out linear movement in the linear movement guide groove 223 of mobile contactor 220.
The degree of depth of linear movement guide groove 223 forms the depth d that is deeper than or equals cam face 213, separates from linear movement guide groove 223 so that prevent sliding pin 231.
Preferably, in the longitudinal direction of the two ends of sliding pin 231, settle roller to 251, to reduce the frictional force between sliding pin 231 and the rotating shaft rod 210 with rotary way.
When mobile contactor 220 with fixedly contact 20 when 30 contact, roller 251 stops at first annular surface of cam face 213.In addition, in mobile contactor 220 when fixed contact 20 separates with the current limliting of rotating operation with 30, roller 251 is through second annular surface of cam face 213, slide with external peripheral surface 215, thereby minimize the frictional force between sliding pin 231 and the rotating shaft rod 210 and carry out the current limliting operation along rotating shaft rod 210.
A spring 241 is installed in each side surface of mobile contactor 220, and the two ends of spring 241 are supported by sliding pin 231.
Rotating shaft rod 210 provides and keeps rooved face to 216.Keep rooved face 216 to be received in sliding pin on the external peripheral surface of rotating shaft rod 210 by final position in the mobile contactor 220 of rotating, postpone mobile contactor 220 and return motion with the contact position of fixed contact 20 and 30, or in mobile contactor 220 when fixed contact 20 separates with the current limliting of rotating operation with 30, keep the released state of mobile contactor 220 from fixed contact 20 and 30.
Under mobile contactor 220 and fixed contact 20 and 30 contacted states, just, the closed circuit state, roller 251 contacts with first curved surfaces with rotating shaft rod 210 center outward.Equally, in mobile contactor 220 because the electromagnetic repulsive force of the big electric current on the circuit makes its rotation when the current limliting that fixed contact 20 separates with 30 is operated, just, when contact 221,21 and 31 is separated from one another, roller 251 sequentially moves to first curved surfaces and second curved surfaces, second curved surfaces has second radius that forms the center in the autorotation axostylus axostyle 210 and be longer than first radius of first curved surfaces, and rolls on the external peripheral surface 215 of rotating shaft rod 210.Spring 241 provides elastic force as rotating torque by sliding pin 231 for mobile contactor 220, makes can to quicken mobile contactor 220 from fixed contact 20 and 30 separate.
The unaccounted reference number of Figure 10 is represented brake, a kind of banking pin, be used for when mobile contactor 220 from fixed contact 20 when 30 separate, the turned position of mobile contactor 220 is restricted to predeterminated position.
For ease of explaining, the mobile contactor assembly of a phase place is disclosed.But, under the situation of leggy mobile contactor assembly, rotating shaft rod 210 can have elongate in shape, and it is connected with the rotating shaft rod of another phase place and is connected with the switching mechanism 12 of Fig. 1, makes the rotating shaft rod of some phase places to be rotated simultaneously by switching mechanism 12.
The mobile contactor 220 of the foregoing description is to be supported by spring 241 and the self-centering that is used for the pin 231 at support spring 241 two ends, and does not need the central shaft of rotating shaft rod 210.But in the present invention, as shown in figure 11, mobile contactor 220 provides the vertical slotted hole 225 that is used at the center of longitudinal direction process rotation axis 226, makes the two ends of mobile contactor 220 to be supported by rotating shaft rod 210.The two ends of rotation axis 226 are inserted in the rotational axis hole 260a that rotating shaft rod 210 forms, to be supported by rotating shaft rod 210.The length of rotation axis 226 is preset, and makes rotation axis 226 can not protrude two outer wall surface 212 of rotating shaft rod 210.Owing to be formed for vertical slotted hole 225 in a longitudinal direction in mobile contactor 220 centers through rotation axis 226, even owing to the uneven wear of movable contact 221 with fixed contact 21 and 31 do not have accurately to be mutually symmetrical based on mobile contactor 220, the contact pressure between movable contact 221 and fixed contact 21 and 31 also can keep equably at upper and lower fixed contact 20 and 30.
In the preferred embodiment shown in Figure 11, when current limliting operation that mobile contactor 220 is separated with 30 from fixed contact 20, spring 241 is installed on two outer wall surface 212 as Figure 10 and the rotating shaft rod 210 that does not contact with rotation axis 226 as shown in Figure 12, thereby does not produce interference between spring 241 and rotation axis 226.
Explain the operation of the mobile contactor assembly of circuit-breaker according to a second embodiment of the present invention below with reference to Figure 13 to Figure 15.
Figure 13 is the front view of the mobile contactor assembly that is used for circuit-breaker according to a second embodiment of the present invention, and it illustrates the state (closed circuit state) that the contact contacts with each other.
As shown in Figure 13, under the state that contacts with each other in the contact, the sliding pin 231 that is connected to spring 241 produces and rotates counterclockwise moment, just, because the initial elastic force of spring 241 rotates the power of mobile contactor 220 in the counterclockwise direction.Therefore, each contact 221 of mobile contactor 220 and fixed contact 20 contact with 31 with 30 contact 21.
Each roller 151 of sliding pin 231 contacts with first annular surface of the cam face 213 of rotatable parts 210.At the closed circuit state, with the contact 21 that the electric current on the circuit is introduced supply side fixed contact 20, pass through each contact 221 of mobile contactor 220, and flow to the face terminals (not shown) through the contact 31 of load-side fixed contact 30.
Figure 14 is the front view of the mobile contactor assembly of circuit-breaker according to a second embodiment of the present invention, the state that contact contacts with each other shown in it (open circuit state).
As shown in Figure 14, when the big electric current owing to short circuit or earth fault flows on circuit, produce electromagnetic repulsive force between each contact 221 of mobile contactor 220 and the contact 21 and 31 of fixed contact 20 and 30.Therefore, mobile contactor 220 is along the direction of separating with 30 with fixed contact 20, and promptly clockwise direction rotates.This electromagnetic repulsive force is the power of the rotating torque that produced much larger than the spring 241 that is used to rotate counterclockwise mobile contactor 220, makes mobile contactor 220 clockwise rotate.Be placed in the roller 251 pulling springs 241 at each sliding pin 231 two ends, and simultaneously, on the cam face 213 of rotating shaft rod 210, roll, and move along the external peripheral surface 215 of rotating shaft rod 210 then.Just, when mobile contactor 220 clockwise rotates, when being placed in the roller 251 pulling springs 241 at each sliding pin 231 two ends, and simultaneously, sequentially through first curved surfaces with the center outside the rotating shaft rod 210 and starting point (therefore being called the dead point) with second annular surface at the center in the rotating shaft rod 210.When roller 251 during through the dead point, the elastic force of spring 241 is converted to fixed contact 20 and 30 closed circuit rotating torque and is used to quicken the open circuit rotating torque that mobile contactor 220 is separated with 30 from fixed contact 20 by being used to return mobile contactor 220.
Sliding pin 231 is in linear movement guide groove 223 linear motion of mobile contactor 220, and simultaneously, along the slip of the cam face 213 and the external peripheral surface 215 of rotating shaft rod 210.But, because the degree of depth of each linear movement guide groove 223 is more than or equal to the degree of depth of first annular surface, so the darkest surface in the cam face 213, sliding pin 231 can not separate from linear movement guide groove 223.
Then, each roller 251 that is installed in sliding pin 231 separates and is caused that by electromagnetic repulsive force the mobile contactor 220 that clockwise rotates rolls at external peripheral surface 215 from the cam face 213 of rotating shaft rod 210.The elastic force that is applied to mobile contactor 220 by spring 241 by sliding pin 231 is converted to and is used for mobile contactor 220 from fixed contact 20 and 30 the open circuit rotating torque of separating by being used for returning mobile contactor 220 to fixed contact 20 and 30 closed circuit rotating torque (counter clockwise direction of accompanying drawing), thereby quickened mobile contactor 220 from fixed contact 20 and 30 separate.
When carrying out the current limliting operation by mobile contactor assembly according to the present invention, mobile contactor is accelerated from the separation of fixed contact, thereby improves the current-limiting function of circuit-breaker.
Figure 15 is the front view of the mobile contactor assembly that is used for circuit-breaker according to a second embodiment of the present invention, and it illustrates finishes mobile contactor from the separation of fixed contact and the state of maintenance open circuit state.
As shown in Figure 15, maintenance guide groove 216 by rotating shaft rod 210 stops at the final position of the mobile contactor that clockwise rotates 220 under the open circuit state with roller 251, is back to fixed contact 20 and 30 motion and the state that keeps mobile contactor 220 to separate with 30 from fixed contact 20 thereby postpone mobile contactor 220.
Just, when mobile contactor 220 reaches the position that is stopped by brake 49, by the maintenance rooved face 216 braking rollers 251 of rotating shaft rod 210.Therefore, mobile contactor 220 keeps the state that separates with 30 from fixed contact 20 by current limliting operation, unless the handle 11 of application drawing 1 manually, external force is imposed on and fixed contact 20 and 30 contacted mobile contactor 220.
As mentioned above, in the mobile contactor assembly according to the circuit-breaker of second embodiment of the invention, the sliding pin that is used for the support spring two ends slides along cam face with first curved surfaces and second curved surfaces and external peripheral surface.Therefore, the elastic force that will be applied to mobile contactor by sliding pin from spring is used for open circuit rotating torque that mobile contactor is separated from fixed contact from being used for the closed circuit rotating torque that mobile contactor is back to fixed contact is converted to, thereby quickens separation and the maximization current-limiting function of mobile contactor from fixed contact.
Equally, in the final position that clockwise rotates with the mobile contactor of separating from fixed contact, sliding pin stops at the maintenance rooved face of rotating shaft rod, thereby postpones the released state that mobile contactor is returned the motion of fixed contact or kept mobile contactor.Therefore, prevented that mobile contactor is back to fixed contact and keeps open circuit state to be extinguished and carry out trip operation by tripping mechanism up to electric arc.
Equally, in the second embodiment of the present invention, by support its two ends easily with spring from the external mounting of rotating shaft rod at sliding pin, thereby simplify assembling.
In addition, because the rotational axis hole that is used for through rotation axis is to form vertical slotted hole at the center of mobile contactor, even even therefore installation or upper and lower fixed contact are accurately being mutually symmetrical based on mobile contactor symmetrically owing to the uneven wear of movable contact and fixed contact at upper and lower fixed contact 20 and 30, the contact pressure between movable contact 221 and the fixed contact also can keep equably.
Because under the situation that does not break away from spirit of the present invention and substantive characteristics, it can be embodied in various ways, should be appreciated that unless stated otherwise, the above embodiments be can't help the details of any aforementioned description and are limited, but understood widely in the spirit and scope that should in additional claim, define, and therefore, all modifications and changes in the equivalent of claim scope or scope all are intended to by additional claim included.
Claims (7)
1. mobile contactor assembly that is used for circuit-breaker comprises:
Rotating shaft rod, it provides the opening that is used for the independent rotation of permission mobile contactor when current limliting is operated and have the cam face that is used for supporting with rotary way this mobile contactor on its external peripheral surface;
Mobile contactor, it is supported with rotary way by this rotating shaft rod, and this mobile contactor has the contact symmetrically to right with the linear movement guide groove at its two ends, and can turn to the contact position of fixed contact or from the separation point position of fixed contact;
Sliding pin is right, it is arranged as two sides crossing over rotating shaft rod, but its linear movement in the linear movement guide groove, and the contact condition of the cam face of maintenance and rotating shaft rod under mobile contactor and fixed contact state of contact, be used in mobile contactor when fixed contact separates with the current limliting operation of rotating, by separating from cam face and, providing pressure from the direction that fixed contact separates to mobile contactor in the acceleration mobile contactor thus along the external peripheral surface slip of rotating shaft rod; With
Spring, be used to sliding pin that elastic force is provided, make and under mobile contactor and fixed contact state of contact, can keep contacting between this mobile contactor and this fixed contact, and be used for operating when current limliting, being mobile contactor separates and when rotating with static rotating shaft rod rightabout from fixed contact, provides elastic force from the direction that fixed contact separates for sliding pin quickening mobile contactor.
2. mobile contactor as claimed in claim 1, wherein, this rotating shaft rod further comprises maintenance guide groove surface, be used for by final position in the mobile contactor of rotating, on the external peripheral surface of rotating shaft rod, receive sliding pin, postpone mobile contactor and be back to motion with the contact position of fixed contact, perhaps be used in mobile contactor keeping the released state of mobile contactor when fixed contact separates with the current limliting operation of rotating from fixed contact.
3. mobile contactor assembly as claimed in claim 1, wherein, the degree of depth of this linear movement guide groove forms and is deeper than or equals the cam face degree of depth, in case the on-slip untie-sell separates from the linear movement guide groove.
4. mobile contactor assembly as claimed in claim 1 further comprises roller, and it is placed in the sliding pin place with rotary way, is used to reduce the frictional force between sliding pin and the rotating shaft rod.
5. mobile contactor assembly as claimed in claim 1, wherein settle during two sliding pins with being mutually symmetrical, two steady pins are fixed to mobile contactor symmetrically, two springs are installed in each side surface of mobile contactor, and these two springs are to install symmetrically, make the one end can be supported by steady pin by sliding pin support and its other end.
6. mobile contactor assembly as claimed in claim 1, wherein, a spring is installed in each side surface of mobile contactor, and the two ends of this spring are supported by sliding pin.
7. mobile contactor assembly as claimed in claim 1, wherein, mobile contactor provides slotted hole, and being used for therein, heart place inserts its rotation axis, and the two ends of having inserted the rotation axis of this slotted hole are inserted in the rotational axis hole that rotating shaft rod forms, to be supported by this rotating shaft rod.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040026372A KR100575243B1 (en) | 2004-04-16 | 2004-04-16 | A movable contactor assembly for a mould cased circuit breaker |
| KR1020040026373 | 2004-04-16 | ||
| KR1020040026372 | 2004-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1750206A true CN1750206A (en) | 2006-03-22 |
| CN100409391C CN100409391C (en) | 2008-08-06 |
Family
ID=36605576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100655540A Expired - Fee Related CN100409391C (en) | 2004-04-16 | 2005-04-15 | Movable contact assembly of circuit breaker for wiring |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100575243B1 (en) |
| CN (1) | CN100409391C (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882546A (en) * | 2010-06-25 | 2010-11-10 | 江苏大全凯帆电器有限公司 | Rotating shaft clamping mechanism |
| CN102005314A (en) * | 2010-11-22 | 2011-04-06 | 江苏大全凯帆电器股份有限公司 | Contactor falling-resistant device |
| 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 |
| CN102129940A (en) * | 2010-01-18 | 2011-07-20 | Ls产电株式会社 | Circuit breaker |
| CN102687219A (en) * | 2009-11-12 | 2012-09-19 | 伊顿工业有限公司 | Rotative double contact |
| CN101373671B (en) * | 2007-08-21 | 2012-10-10 | 西门子公司 | Switching device with a switching shaft for mounting a rotary contact link and multipole switching device arrangement |
| CN103077858A (en) * | 2013-01-16 | 2013-05-01 | 创奇科技有限公司 | Contact system of circuit breaker |
| CN107464729A (en) * | 2016-06-03 | 2017-12-12 | 通用电气公司 | Breaker including rotor assembly |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100676968B1 (en) * | 2005-12-29 | 2007-02-02 | 엘에스산전 주식회사 | A contactor assembly for a current limitable circuit breaker |
| DE102009050296A1 (en) * | 2009-10-15 | 2011-04-21 | Siemens Aktiengesellschaft | Circuit breaker, especially for low voltage |
| KR101447041B1 (en) * | 2013-11-19 | 2014-10-06 | 엘에스산전 주식회사 | Curcuit breaker |
| KR102464650B1 (en) | 2016-05-03 | 2022-11-10 | 엘에스일렉트릭(주) | Current limiting device of circuit breaker |
| CN110010417B (en) * | 2019-04-10 | 2023-10-27 | 李兵 | Contactor |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1292453B1 (en) * | 1997-07-02 | 1999-02-08 | Aeg Niederspannungstech Gmbh | ROTATING GROUP OF CONTACTS FOR HIGH FLOW SWITCHES |
| ES2249875T3 (en) * | 1999-11-03 | 2006-04-01 | AEG NIEDERSPANNUNGSTECHNIK GMBH & CO. KG | ROTARY CONTACT ARM ARRANGEMENT FOR SWITCH. |
| US6310307B1 (en) * | 1999-12-17 | 2001-10-30 | General Electric Company | Circuit breaker rotary contact arm arrangement |
| US6403909B1 (en) * | 2000-03-13 | 2002-06-11 | General Electric Company | Trip override for rotary breaker |
| CN1224070C (en) * | 2001-11-29 | 2005-10-19 | 陈臣明 | Current-limiting device with repulsive force mechanism |
| JP2004071241A (en) * | 2002-08-02 | 2004-03-04 | Fuji Electric Holdings Co Ltd | Circuit breaker |
-
2004
- 2004-04-16 KR KR1020040026372A patent/KR100575243B1/en not_active IP Right Cessation
-
2005
- 2005-04-15 CN CNB2005100655540A patent/CN100409391C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373671B (en) * | 2007-08-21 | 2012-10-10 | 西门子公司 | Switching device with a switching shaft for mounting a rotary contact link and multipole switching device arrangement |
| CN102687219A (en) * | 2009-11-12 | 2012-09-19 | 伊顿工业有限公司 | Rotative double contact |
| 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 |
| CN102129940A (en) * | 2010-01-18 | 2011-07-20 | Ls产电株式会社 | Circuit breaker |
| CN102129940B (en) * | 2010-01-18 | 2013-11-20 | Ls产电株式会社 | Circuit breaker |
| CN101882546A (en) * | 2010-06-25 | 2010-11-10 | 江苏大全凯帆电器有限公司 | Rotating shaft clamping mechanism |
| CN102005314A (en) * | 2010-11-22 | 2011-04-06 | 江苏大全凯帆电器股份有限公司 | Contactor falling-resistant device |
| CN103077858A (en) * | 2013-01-16 | 2013-05-01 | 创奇科技有限公司 | Contact system of circuit breaker |
| CN103077858B (en) * | 2013-01-16 | 2015-07-08 | 创奇科技有限公司 | Contact system of circuit breaker |
| CN107464729A (en) * | 2016-06-03 | 2017-12-12 | 通用电气公司 | Breaker including rotor assembly |
| CN107464729B (en) * | 2016-06-03 | 2020-08-18 | Abb瑞士股份有限公司 | Circuit breaker including rotor assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100575243B1 (en) | 2006-05-02 |
| KR20050101248A (en) | 2005-10-21 |
| CN100409391C (en) | 2008-08-06 |
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Granted publication date: 20080806 Termination date: 20140415 |