CN102568964B - Protection assembly of movable static contact of plastic shell breaker - Google Patents
Protection assembly of movable static contact of plastic shell breaker Download PDFInfo
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- CN102568964B CN102568964B CN201210059199.6A CN201210059199A CN102568964B CN 102568964 B CN102568964 B CN 102568964B CN 201210059199 A CN201210059199 A CN 201210059199A CN 102568964 B CN102568964 B CN 102568964B
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Abstract
The invention discloses a protection assembly of a movable static contact of a plastic shell breaker, comprising a static contact plastic piece and a plastic support piece, wherein the static contact plastic piece wraps the static contact, part of the static contact plastic piece and part of the static contact are arranged in a cavity of the plastic support piece, the static contact plastic piece is formed by combining a first plastic sheet with a second plastic sheet; a second round hole coaxial with a first through hole in the static contact is formed in the front side wall of the first plastic sheet; the front side wall on the lower part of the second round hole extends towards the bottom to form a first extension angle, the left side surface of the first extension angle is a first arc side surface always in clearance fit with the left side surface of the cavity, the rear side wall of the second plastic sheet extends towards the bottom to form a second extension angle, and the left side surface of the second extension angle is a second arc side surface always in clearance fit with the left side surface of the cavity. The lower part of the static contact is omni-directionally blocked, and the electric arc or metal particles generated by contact burnt by arc is prevented from spraying towards the lower part of the static contact, so as to ensure the normal reset of the static contact.
Description
Technical field
The present invention relates to breaker of plastic casing, be specifically related to the protection assembly of movable static contact of plastic shell breaker, belong to the technical field of low-voltage circuit breaker.
Background technology
In moulding case low-voltage circuit breaker contact arc-extinguishing system, fixed contact is its inner critical component.Existing breaker of plastic casing static contact structure divides fixedly two kinds of fixed contacts and movable fixed contact.In movable static contact structure, it is fast that movably dynamic/static contact separates speed, and arc length pulls open length, and breaking capacity improves.Movable fixed contact generally has working of plastics to support, and working of plastics plays very important protection and supporting role to whole movable static contact structure.Current ubiquitous problem is that fixed contact plastic supporting pieces does not have protective effect to fixed contact.At dynamic/static contact breaking course, produce electric arc, owing to not having good shutoff to cause the metallic of electrical arc erosion contact and arc extinguishing grid pieces generation can be sprayed onto rear and the below of fixed contact: be sprayed onto fixed contact rear and can cause the spring deformation annealing of reset force being provided or fixed contact being adhered to each other with fixed contact rotating shaft to fixed contact, make fixed contact motion not smooth, affect switch performance; Splash to fixed contact below can cause fixed contact with connect arrange or be flexible coupling between melting welding or arcing phenomenon, make electric clearance reduce easily to puncture, affect equally switch performance.And preventing that traditionally the parts of altering after metallic from being to be enclosed within fixed contact contact glass-cloth board below, glass-cloth board is installed and is subject to the impact of space and material (material flexibility is good) to cause fixed contact assembling loaded down with trivial details and unreliable.
For addressing the above problem, the Patent Application Publication that publication number is CN102184812A a kind of movable static contact structure of breaker of plastic casing, movable fixed contact working of plastics rear portion be cross section be fan-shaped two symmetrical in the fan-shaped boss of fixed contact.When circuit breaker cut-offs, fixed contact working of plastics is along with fixed contact moves together, and fan-shaped boss can guarantee that metallic can not be sprayed onto fixed contact rear portion and make the fixed contact can double swerve, guaranteed that fixed contact scolds out normally, and then guaranteed the performance of circuit breaker.But the defect of this structure is: though the fan-shaped boss at working of plastics rear portion well on shutoff fixed contact, left and right, rear space, but due to the as a whole part of this part, in installation process, must make fixed contact lower portion without shutoff, with regard to causing metallic that switch produces in breaking course to be attached to, be even deposited in fixed contact lower zone like this, cause and between fixed contact and electric point of attachment, produce melting welding or arcing phenomenon, electric clearance is subtracted and easily puncture down, affect switch performance.
Summary of the invention
In order to solve existing defect in current fixed contact plugging structure, the present invention aims to provide a kind of assembly of effective shutoff movable fixed contact, and it is a kind of comprehensive shutoff, the assembled movable fixed contact protective device in left and right.Then provide that a kind of mounting means is simple, the good protection of the movable fixed contact for breaker of plastic casing of protective value structure.
The technical solution used in the present invention is: the present invention is comprised of fixed contact working of plastics and plastic supporting pieces, fixed contact working of plastics is wrapped in outside fixed contact, in the middle of plastic supporting pieces, there is a cavity volume, part fixed contact working of plastics and part fixed contact are arranged in cavity volume, and fixed contact working of plastics is combined by the first plastics lamellar body and the second plastics lamellar body, the first plastics lamellar body has a roof and a front side wall, and the rearward position on roof has the first groove, has the first circular hole of matching with round platform on fixed contact and second circular hole coaxial with the first through hole on fixed contact on front side wall, the front side wall that is positioned at the second circular hole bottom extends first angle of strike to bottom direction, the left surface of the first angle of strike is and the left surface of cavity volume the first arcuation side of phase matched in clearance all the time, the first angle of strike is to a cylindrical boss of the vertical extension of rear direction, and cylindrical boss rearward end is a fan-shaped barb, the second plastics lamellar body has a rear wall, rear wall top extend one with the mutually friction tight projection of the first groove, on rear wall, have the third through-hole coaxial and identical with described the second circular hole, rear wall extends second angle of strike to bottom, the left surface of the second angle of strike is and the left surface of cavity volume the second arcuation side of phase matched in clearance all the time, on the second angle of strike, have and mutually friction tight the first groove of described cylindrical boss, the rear end of the first groove has and mutually friction tight the second groove of described fan-shaped barb, the left surface of the second angle of strike is and the left surface of cavity volume the second arcuation side of matched in clearance all the time.
The present invention can block fixed contact below in all directions, has prevented that electric arc or electrical arc erosion contact from producing the splash of metallic to fixed contact below, has prevented that the metallic that disjunction produces from adhering to, thereby has prevented the melting welding of electric connecting member and the distortion of spring; Prevented that fixed contact rotating shaft and fixed contact from being moved by adhering metal particle not smooth, thereby guaranteed the normal reset of fixed contact.Total is compacter, and fixed contact motion is smooth, has guaranteed circuit breaker performance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, with the explanation to preferred but not exclusive embodiment shown in infinite example, can have a clear understanding of further characteristic of the present invention and advantage.
Fig. 1 is the protection assembly of movable static contact of plastic shell breaker of the present invention and the assembling schematic diagram of fixed contact 2;
Fig. 2 be the master of Fig. 1 depending on analysing and observe diagram, the fixed contact 2 in Fig. 2 is positioned at initial position;
Fig. 3 is that the fixed contact 2 in Fig. 2 moves to the diagram of scolding open position;
Fig. 4 is fixed contact working of plastics in Fig. 21 and the assembly structure figure of fixed contact 2;
Fig. 5 is the structure chart of the fixed contact 2 in Fig. 4;
Fig. 6 be fixed contact working of plastics 1 structure in Fig. 4 in right front to three-dimensional view;
Fig. 7 is the explosive view of the working of plastics of fixed contact shown in Fig. 61 structure;
Fig. 8 be the working of plastics of fixed contact shown in Fig. 71 structure in right back to three-dimensional view;
In figure: 1. fixed contact working of plastics; 2. fixed contact; 3. fixed contact strutting piece; 4. the first axle; 5. fixed contact rotating shaft; 6. spring; 11. first plastics lamellar bodies; 12. second plastics lamellar bodies; 21. round platforms; 22. first through holes; 23. second through holes; 111. first circular holes; 112. second circular holes; 113. cylindrical boss; 114. fan-shaped barbs; 115. first grooves; 116. first angle of strike; 117. first arcuation sides; 122. third through-hole; 123. protruding; 124. first grooves; 125; The second groove; 126. second angle of strike; 127. second arcuation sides; 31. second grooves; 32. fourth holes; 33. cavity volumes.
Embodiment
Referring to Fig. 1-3; the protection assembly of movable static contact of plastic shell breaker of the present invention is comprised of fixed contact working of plastics 1 and plastic supporting pieces 3; fixed contact working of plastics 1 is wrapped in outside fixed contact 2; in the middle of plastic supporting pieces 3, have a cavity volume 33, part fixed contact working of plastics 1 and part fixed contact 2 are arranged in cavity volume 33.The first axle 4 passes the hole on cavity volume 33 and fixed contact working of plastics 1 and fixed contact 2 at fore-and-aft direction simultaneously, corresponding the 3rd groove 31, the first axles 4 that the two ends of the first axle 4 are arranged on plastic supporting pieces 3 front and rear walls can move along corresponding the 3rd groove 31 of plastic supporting pieces 3.Fixed contact rotating shaft 5 also passes the hole on cavity volume 33 and fixed contact working of plastics 1 and fixed contact 2 at fore-and-aft direction, the two ends of fixed contact rotating shaft 5 are fixedly connected on the corresponding fourth hole 32 on plastic supporting pieces 3 front and rear walls, at the two ends of fixed contact rotating shaft 5, cover has spring 6(the present invention to adopt torsion spring), by spring 6, make fixed contact rotating shaft 5 be fixed on plastic supporting pieces 3, make fixed contact 2 and fixed contact working of plastics 1 rotate along fixed contact rotating shaft 5 simultaneously.
Referring to Fig. 4-5, fixed contact 2 is provided with round platform 21, the first through hole 22 and the second through hole 23, wherein, round platform 21 is for being fixedly connected with fixed contact working of plastics 1, the first through hole 22 is corresponding to the first axle 4, the first axle 4 just passes the first through hole 22, the second through holes 23 corresponding to fixed contact rotating shaft 5, and fixed contact rotating shaft 5 is just through the second through hole 23.
Referring to Fig. 6-8, fixed contact working of plastics 1 is combined by the first plastics lamellar body 11 and the second plastics lamellar body 12.The first plastics lamellar body 11 has a roof and a front side wall, and the end face of the shape of roof and fixed contact 2 adapts.On roof and near rearward position, have the first groove 115.On front side wall, have the first circular hole 111 and the second circular hole 112, the first circular holes 111 match with the round platform 21 on fixed contact 2, in order to round platform 21 to be installed.The second circular hole 112 is coaxial with the first through hole 22 on fixed contact 2, in order to the first axle 4 to be installed.The left surface that the front side wall that is positioned at the second circular hole 112 bottoms extends first angle of strike 116, the first angle of strike 116 to bottom direction is the first arcuation side 117, and the left surface of this arcuation side 117 and the cavity volume 33 of plastic supporting pieces 3 is matched in clearance all the time.The first angle of strike 116 is to a cylindrical boss 113 of the vertical extension of rear direction, and cylindrical boss 113 rearward end are fan-shaped barbs 114.
The second plastics lamellar body 12 has a rear wall, and a projection 123 is extended at rear wall top, and the first groove 115 phase tight fits on this projection 123 and the first plastics lamellar body 11, during installation stretch into projection 123 the first groove 115 and fix.On rear wall, have third through-hole 122, this third through-hole 122 is coaxial and identical with the second circular hole 112 on the first plastics lamellar body 11, and in order to the first axle 4 to be installed, the first axle 4 is simultaneously through third through-hole 122 and the second circular hole 112.Rear wall extends second angle of strike 126 to bottom, the left surface of the second angle of strike 126 is the second arcuation side 127, this arcuation side also with the left surface of the cavity volume 33 of plastic supporting pieces 3 phase matched in clearance all the time, on the second angle of strike 126, have the first groove 124, the rear end of the first groove 124 has the second groove 125, cylindrical boss 113 phase tight fits on the first groove 124 and the first plastics lamellar body 11, the structure phase tight fit of the fan-shaped barb 114 on the second groove 125 and the first plastics lamellar body 11.Phase tight fit by projection 123 with the first groove 124, and the bayonet fittings of fan-shaped barb 114 and the second groove 125, the first arcuation side 117 and the second arcuation side 127 keep closed states and two cambered surface radians consistent, simultaneously with the left surface of cavity volume 33 phase matched in clearance all the time.
When fixed contact working of plastics 1 is installed with fixed contact 2, the first plastics lamellar body 11 is enclosed within on fixed contact 2 by the first through hole 111 from front to back, round platform 21 on fixed contact 2 is matched with the first circular hole 111, guarantee that the first plastics lamellar body 11 contacts with the reliable of fixed contact 2.The second plastics lamellar body 12,, matches cylindrical boss 113 in the time of fixedly by fixing backward from fixed contact 2 rear sides with the first groove 124, by fan-shaped barb 114, stick in the second groove 125; Meanwhile, by the first groove 115 bayonet fittings on the projection 123 on the second plastics lamellar body 12 and the first plastics lamellar body 11.Third through-hole 122 use first axles 4 of the first through hole 22 of fixed contact 2 and the second circular hole 112 of the first plastics lamellar body 11 and the second plastics lamellar body 12 are coaxially installed.The first axle 4 passes cavity volume 33, the first through hole 22, the second circular hole 112 and third through-hole 122 simultaneously, and can move along corresponding the second groove 31 on plastic supporting pieces 3 front and rear walls; Fixed contact rotating shaft 5 is simultaneously through the second through hole 23 affixed fourth hole 32 on cavity volume 33 and fixed contact 2, and fixed contact 2 and fixed contact working of plastics 1 can be along 5 rotations of fixed contact rotating shaft.
As shown in Figure 2,3, when fixed contact 2 turns to Fig. 3 and scolds open position from Fig. 2 initial position, fixed contact working of plastics 1 is followed fixed contact 2 and is rotated counterclockwise together.When moving contact is scolded out, the electric arc of generation can scaling loss contact and arc extinguishing grid pieces also produces metallic, and these particles can be to the below of fixed contact 2 and the inside splash of cavity volume 33, thereby affects circuit breaker interrupting performance.In order to address the above problem, fixed contact 2 is blocked and blocked in energy of the present invention upper and lower, left and right in all directions, specifically: projection 123 bayonet fittings that extend at the first groove 115 that the first plastics lamellar body 11 roof rearward position have and the second plastics lamellar body 12 rear wall tops, the first plastics lamellar body 11 roofs contact with the end face of fixed contact 2, have realized the shutoff of movable fixed contact top; The first plastics lamellar body 11 is enclosed within on fixed contact 2 by the first through hole 111 from front to back, round platform 21 on fixed contact 2 is matched with the first through hole 111, guarantee reliable contact of the first plastics lamellar body 11 and fixed contact 2 front sides, the second plastics lamellar body 12 from fixed contact 2 rear sides by fixing fixed contact 2 backward, be adjacent to mutually with the rear side of fixed contact 2, and then realized movable fixed contact left and right-hand shutoff; The first arcuation side 117 and the second arcuation side 127 coordinating by cylindrical boss 113 and groove 124 on first and second plastics lamellar body, and fan-shaped barb 114 and the common whole arcuation side that forms of coordinating of the second groove 125, the left surface of this arcuation side and the cavity volume 33 of plastic supporting pieces 3 is phase matched in clearance all the time, has realized the shutoff of movable fixed contact below; And then formed movable fixed contact omnibearing shutoff up and down.
Claims (2)
1. the protection assembly of a movable static contact of plastic shell breaker, by fixed contact working of plastics (1) and plastic supporting pieces (3), formed, fixed contact working of plastics (1) is wrapped in outside fixed contact (2), in the middle of plastic supporting pieces (3), there is a cavity volume (33), part fixed contact working of plastics (1) and part fixed contact (2) are arranged in cavity volume (33), it is characterized in that: fixed contact working of plastics (1) is combined by the first plastics lamellar body (11) and the second plastics lamellar body (12), the first plastics lamellar body (11) has a roof and a front side wall, rearward position on roof has the first groove (115), has the first circular hole (111) of matching with round platform (21) on fixed contact (2) and second circular hole (112) coaxial with the first through hole (22) on fixed contact (2) on front side wall, the front side wall that is positioned at the second circular hole (112) bottom extends first angle of strike (116) to bottom direction, the left surface of the first angle of strike (116) is and the left surface of cavity volume (33) the first arcuation side (117) of matched in clearance all the time, the first angle of strike (116) is to the vertical cylindrical boss (113) that extends of rear direction, and cylindrical boss (113) rearward end is a fan-shaped barb (114), the second plastics lamellar body (12) has a rear wall, rear wall top extend one with the mutually friction tight projection of the first groove (115) (123), on rear wall, have the third through-hole (122) coaxial and identical with described the second circular hole (112), rear wall extends second angle of strike (126) to bottom, on the second angle of strike (126), have and mutually friction tight the first groove of described cylindrical boss (113) (124), the rear end of the first groove (124) has and mutually friction tight the second groove of described fan-shaped barb (114) (125), the left surface of the second angle of strike (126) is and the left surface of cavity volume (33) the second arcuation side (127) of matched in clearance all the time.
2. the protection assembly of a kind of movable static contact of plastic shell breaker according to claim 1, is characterized in that: the first axle (4) simultaneously also can be along the second groove (31) motion on plastic supporting pieces (3) through cavity volume (33), the first through hole (22) and the second circular hole (112), third through-hole (122); Fixed contact rotating shaft (5) is simultaneously through corresponding the second through hole (23) on cavity volume (33) and fixed contact 2, the two ends of fixed contact rotating shaft (5) are fixedly connected on the corresponding fourth hole (32) on plastic supporting pieces (3) front and rear wall, and fixed contact (2) and fixed contact working of plastics (1) can rotate along fixed contact rotating shaft (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059199.6A CN102568964B (en) | 2012-03-08 | 2012-03-08 | Protection assembly of movable static contact of plastic shell breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210059199.6A CN102568964B (en) | 2012-03-08 | 2012-03-08 | Protection assembly of movable static contact of plastic shell breaker |
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| Publication Number | Publication Date |
|---|---|
| CN102568964A CN102568964A (en) | 2012-07-11 |
| CN102568964B true CN102568964B (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210059199.6A Active CN102568964B (en) | 2012-03-08 | 2012-03-08 | Protection assembly of movable static contact of plastic shell breaker |
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| CN (1) | CN102568964B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204348658U (en) * | 2014-12-10 | 2015-05-20 | 浙江正泰电器股份有限公司 | The contact apparatus with turning fixed contact of circuit breaker and circuit breaker |
| CN204348657U (en) * | 2014-12-10 | 2015-05-20 | 浙江正泰电器股份有限公司 | The contact apparatus with turning fixed contact of circuit breaker and circuit breaker |
| CN111161985A (en) * | 2018-11-07 | 2020-05-15 | 上海良信电器股份有限公司 | Switch contact system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0635859A1 (en) * | 1993-07-19 | 1995-01-25 | Schneider Electric Sa | Circuit breaker having an operating mechanism controlled by an electromagnetic actuator |
| CN101499386A (en) * | 2008-12-16 | 2009-08-05 | 天津市百利电气有限公司 | Protection apparatus for magnetic experiment contact head of plastic shell type circuit breaker and its use method |
| CN201689852U (en) * | 2010-04-16 | 2010-12-29 | 江苏辉能电气有限公司 | Low-voltage circuit breaker movable contact structure with protecting part |
| CN102184812A (en) * | 2011-05-03 | 2011-09-14 | 江苏辉能电气有限公司 | Movable static contact structure for plastic-shell circuit breaker |
| CN102184814A (en) * | 2011-05-03 | 2011-09-14 | 江苏辉能电气有限公司 | Arc extinguishing equipment of moulded case circuit breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5150921B2 (en) * | 2008-10-23 | 2013-02-27 | テンパール工業株式会社 | Circuit breaker |
-
2012
- 2012-03-08 CN CN201210059199.6A patent/CN102568964B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0635859A1 (en) * | 1993-07-19 | 1995-01-25 | Schneider Electric Sa | Circuit breaker having an operating mechanism controlled by an electromagnetic actuator |
| CN101499386A (en) * | 2008-12-16 | 2009-08-05 | 天津市百利电气有限公司 | Protection apparatus for magnetic experiment contact head of plastic shell type circuit breaker and its use method |
| CN201689852U (en) * | 2010-04-16 | 2010-12-29 | 江苏辉能电气有限公司 | Low-voltage circuit breaker movable contact structure with protecting part |
| CN102184812A (en) * | 2011-05-03 | 2011-09-14 | 江苏辉能电气有限公司 | Movable static contact structure for plastic-shell circuit breaker |
| CN102184814A (en) * | 2011-05-03 | 2011-09-14 | 江苏辉能电气有限公司 | Arc extinguishing equipment of moulded case circuit breaker |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2010-102936A 2010.05.06 |
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| CN102568964A (en) | 2012-07-11 |
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Effective date of registration: 20220525 Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. Address before: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee before: Jiangsu Phono Electric Co.,Ltd. |
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Address after: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee after: Eaton Huineng low voltage electrical appliances (Jiangsu) Co.,Ltd. Address before: 212132 No. 97, Wufengshan Road, Dagang, New District, Zhenjiang City, Jiangsu Province Patentee before: Huineng low voltage electric appliance (Jiangsu) Co.,Ltd. |
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