CN107017136B - Contact mechanism of universal circuit breaker - Google Patents
Contact mechanism of universal circuit breaker Download PDFInfo
- Publication number
- CN107017136B CN107017136B CN201610060421.2A CN201610060421A CN107017136B CN 107017136 B CN107017136 B CN 107017136B CN 201610060421 A CN201610060421 A CN 201610060421A CN 107017136 B CN107017136 B CN 107017136B
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- contact
- guide
- guide rod
- cavity
- spring
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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
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Abstract
A contact mechanism of a universal circuit breaker comprises a contact support, contact blades and contact springs, wherein the contact blades and the contact springs are pivotally mounted on the contact support, the contact blades are arranged on the contact support side by side, the contact mechanism further comprises a plurality of guide rods, each contact spring is sleeved at one end of each guide rod, at least one guide rod corresponds to one contact blade, a movable cavity for accommodating one ends of the contact springs and the guide rods is arranged on the contact support, the guide rods compress the contact springs and can move in the movable cavity, and the other ends of the guide rods are provided with contact ends matched with the contact blades in a contact mode; the movable cavity is internally provided with a first limit end for limiting one end of the contact spring, the guide rod is provided with a second limit end for limiting the other end of the contact spring, the contact blade rotates to touch the contact end of the guide rod, and the guide rod provides contact elastic force for the contact blade by compressing the contact spring. The invention provides a contact mechanism of a universal circuit breaker, which has stable performance and installation, simple structure and convenient and quick installation.
Description
Technical Field
The invention relates to the field of low-voltage electrical appliances, in particular to a universal circuit breaker, and particularly relates to a contact mechanism of the universal circuit breaker.
Background
As shown in fig. 1 and 2, in a conventional contact mechanism of a universal circuit breaker, a contact support is provided with a spring mounting hole for mounting a contact spring, one end of the contact spring is mounted in the spring mounting hole and fixed, and the other end of the contact spring extends out of the spring mounting hole to provide elastic force for a moving contact piece.
When the contact structure of the universal circuit breaker is used or tested, the movable contact piece rotates, the force applied to a contact spring of the contact structure is not completely applied to the direction of spring compression, the oblique pressure can cause stress bending deformation of the spring, the force finally causing the spring cannot effectively act on the contact piece, the contact pressure of the contact is reduced, and the use performance of circuit breaking is influenced. In addition, when the contact structure of the universal circuit breaker is used or tested, due to the fact that technical parameters are increased, current capacity is increased, particles generated by arc spraying easily enter a contact spring, heat brought by the particles is great in damage to the contact spring, and meanwhile the particles generated by the arc spraying are attached to the surface of the spring to influence the effective action of the spring force.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a contact mechanism of a universal circuit breaker, which has stable performance and installation, simple structure and convenient and quick installation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a contact mechanism of a universal circuit breaker comprises a contact support 1, contact blades 2 and contact springs 3 which are pivotally arranged on the contact support 1, a plurality of contact blades 2 are arranged on the contact support 1 side by side, the contact mechanism also comprises a plurality of guide rods 6, each contact spring 3 is sleeved at one end of each guide rod 6, at least one guide rod 6 corresponds to one contact blade 2, a movable cavity 103 for accommodating the contact spring 3 and one end of each guide rod 6 is arranged on the contact support 1, the guide rods 6 compress the contact springs 3 and can move in the movable cavity 103, and the other end of each guide rod 6 is provided with a contact end 63 which is in contact fit with the contact blades 2; a first limit end 103a for limiting one end of the contact spring 3 is arranged in the movable cavity 103, a second limit end 62 for limiting the other end of the contact spring 3 is arranged on the guide rod 6, the contact blade 2 rotates to touch the contact end 63 of the guide rod 6, and the guide rod 6 provides contact elastic force for the contact blade 2 by compressing the contact spring 3.
Further, still include and carry out spacing deflector 7 to guide bar 6, deflector 7 is installed on contact support 1, and deflector 7 sets up with guide bar 6 is perpendicular, be equipped with the through-hole 701 that contact tip 63 of guide bar 6 passed on deflector 7.
Further, one end of the guide bar 6 is provided with a guide end 61, the movable cavity 103 includes a first cavity 1031 for accommodating the contact spring 3 and a second cavity 1032 for guiding the guide bar 6 when the guide bar 6 moves, and the first limiting end 103a is located between the first cavity 1031 and the second cavity 1032.
Further, the contact spring further comprises a guide sleeve 5, the second cavity 1032 is arranged in a guide groove in the middle of the guide sleeve 5, the guide sleeve 5 comprises a first cylindrical sleeve 51 at one end of the bottom of the movable cavity 103 and a second cylindrical sleeve 52 at the other end, and a first limiting end 103a for limiting one end of the contact spring 3 is formed at the end of the second cylindrical sleeve 52; when the contact spring is installed, the contact spring 3 is firstly sleeved at one end of the guide rod 6, one end of the guide rod 6 is installed with the guide sleeve 5, and then the guide rod 6, the contact spring 3 and the guide sleeve 5 are installed in the movable cavity 103 together.
Further, the second cavity 1032 is a guide groove formed in the bottom of the first cavity 1031, a first limiting end 103a for limiting one end of the contact spring 3 is formed in the bottom of the first cavity 1031, when the contact spring 3 is mounted, the contact spring 3 is firstly sleeved on one end of the guide rod 6, and one end of the contact spring 3 sleeved on the guide rod 6 is installed in the movable cavity 103.
Further, the second limit end 62 is a circular limiting plate which is formed by extending the other end side wall of the guide rod 6 to the periphery, one side of the circular limiting plate abuts against the contact spring 3 to limit the other end of the contact spring 3, and the other side of the circular limiting plate is matched with the guide plate 7 to limit the guide rod 6.
Further, the guide plate 7 is a flat plate, the guide plate 7 is arranged on one side of the upper end of the contact support 1, and the connection mode of the guide plate 7 and the contact support 1 is a snap connection or a fastening connection.
Further, the guide rod 6 is an insulating guide rod.
Further, the end of the contact end 63 contacting and matching with the contact blade 2 is an arc surface.
Further, a contact blade mounting cavity 101 is arranged in the middle of the contact support 1, a plurality of contact blades 2 are arranged in the contact blade mounting cavity 101 side by side, an insulating partition plate is arranged between every two adjacent contact blades 2, and the plurality of contact blades 2 and a plurality of insulating partition plates are connected to the contact support 1 in a pivoting mode through a rotating shaft; one side of one end of the contact blade 2 is provided with a contact 201, the other side of the contact blade faces the contact end 63 of the guide rod 6, the other end of the contact blade 2 is connected with a connecting conductor 22, and the other end of the connecting conductor 22 is connected with the conductive busbar.
The contact mechanism of the universal circuit breaker is provided with the guide rod, the contact spring is sleeved on the guide rod and provides elasticity for the guide rod, the contact spring can only do axial movement along the guide rod through the contact of the guide rod and the contact piece, and deformation cannot occur. A contact mechanism of the circuit breaker is provided with a guide plate; the guide plate limits the guide rod to prevent the guide rod from popping up; during installation, the contact end of the guide rod penetrates through the through hole of the guide plate to be installed, and the installation position of the guide rod is accurately positioned; thirdly, the guide plate decomposes the oblique pressure of the contact blade on the guide rod; fourthly, the contact end of the guide rod is matched with the through hole of the guide plate, and the guide plate plays a role in guiding the guide rod; fifthly, the guide plate plays a role in sealing, so that the damage of arc spraying particles generated when the contact is closed to the contact spring is avoided, the service life of the contact spring is prolonged, and the safety performance of a product is improved. The guide rod can also be provided with a limiting structure except for the second limiting end to limit the guide rod.
Drawings
Fig. 1 is a perspective view of a prior art contact mechanism of a conventional circuit breaker according to the present invention;
fig. 2 is a schematic sectional view showing a prior art contact mechanism of the conventional circuit breaker according to the present invention;
fig. 3 is a perspective view of a contact mechanism of the universal circuit breaker of the present invention;
fig. 4 is a schematic sectional view showing a contact mechanism of the conventional circuit breaker according to the present invention;
fig. 5 is a schematic view of the construction of the guide sleeve of the present invention.
Detailed Description
The following further describes a specific embodiment of the contact mechanism of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 3 to 5. The contact mechanism of the circuit breaker of the present invention is not limited to the description of the following embodiments.
The universal circuit breaker of the invention enables a moving contact on a contact support 1 to be contacted with a fixed contact through rotating the contact support 1 so as to switch on a circuit.
As shown in fig. 3, the middle part of the contact support 1 is provided with a contact blade mounting cavity 101, a plurality of contact blades 2 are arranged side by side and are arranged in the contact blade mounting cavity 101, an insulating partition plate is arranged between two adjacent contact blades 2, the contact blades 2 are connected with the insulating partition plate in series through a rotating shaft, two ends of the rotating shaft are pivotally connected to two sides of the contact support 1, one side of one end of each contact blade 2 is provided with a contact 201, the other side of each contact blade 2 faces an elastic element, the other end of each contact blade 2 is connected with a connecting conductor 22, and the other end of each connecting conductor 22 is connected with. When the moving contact and the static contact are closed, the contact blade 2 is pushed to rotate, and the elastic element provides elastic overtravel for the contact blade 2, so that the moving contact and the static contact are in close contact.
As shown in fig. 3 and 4, in the contact mechanism of the universal circuit breaker of the present invention, the elastic element includes a guide rod 6 and contact springs 3, the contact springs 3 are sleeved on one end of the guide rod 6, each contact spring 3 is sleeved on one end of the guide rod 6, and at least one guide rod corresponds to one contact blade 2; the contact support 1 is provided with a movable cavity 103 for accommodating the contact spring 3 and one end of the guide rod 6, the guide rod 6 compresses the contact spring 3 and can move in the movable cavity 103, and the other end of the guide rod 6 is provided with a contact end 63 in contact fit with the contact blade 2; a first limit end 103a for limiting one end of the contact spring 3 is arranged in the movable cavity 103, a second limit end 62 for limiting the other end of the contact spring 3 is arranged on the guide rod 6, the contact blade 2 rotates to touch the contact end 63 of the guide rod 6, and the guide rod 6 provides contact elastic force for the contact blade 2 by compressing the contact spring 3. The contact mechanism of the universal circuit breaker is provided with the guide rod, the contact spring is sleeved on the guide rod and provides elasticity for the guide rod, the contact spring can only do axial movement along the guide rod through the contact of the guide rod and the contact piece, and deformation cannot occur.
As shown in fig. 3 and 4, the contact mechanism of the universal circuit breaker further includes a guide plate 7 cooperating with the second limit end 62 to limit the position of the guide rod 6, the guide plate 7 is mounted on the contact support 1, the guide plate 7 is perpendicular to the guide rod 6, and the guide plate 7 is provided with a through hole 701 through which the contact end 63 of the guide rod 6 passes.
The contact mechanism of the circuit breaker is provided with a guide plate 7; firstly, the guide plate 7 is matched with the second limiting end 62 to limit the guide rod 6, so that the guide rod 6 is prevented from popping up; secondly, during installation, the contact end 63 of the guide rod 6 penetrates through the through hole 701 of the guide plate 7 for installation, and the installation position of the guide rod 6 is accurately positioned; thirdly, the guide plate 7 decomposes the oblique pressure of the contact blade on the guide rod 6; fourthly, the contact end 63 of the guide rod 6 is matched with the through hole 701 of the guide plate 7, and the guide plate plays a role in guiding the guide rod; fifthly, the guide plate plays a role in sealing, so that the damage of arc spraying particles generated when the contact is closed to the contact spring 3 is avoided, the service life of the contact spring is prolonged, and the safety performance of a product is improved. The guide rod 6 may also be provided with a limiting structure other than the second limiting end 62 for limiting the guide rod 6.
As shown in fig. 4, one end of the guide rod 6 is provided with a guide end 61, the other end of the guide rod 6 is provided with a contact end 63, and the middle part of the guide rod 6 close to the contact end 63 is provided with a second limit end 62. The guide rod 6 is an insulating guide rod. The guide rod 6 is made of an insulating material which is not easy to deform, and the guide rod cannot deform after the contact blade is contacted for multiple times, so that the reliability of the product is improved.
As shown in fig. 4, the second limiting end 62 is a circular limiting plate that is formed by extending the side wall of the other end of the guide rod 6 to the periphery, one side of the circular limiting plate abuts against the contact spring 3 to limit the other end of the contact spring 3, and the other side of the circular limiting plate is matched with the guide plate 7 to limit the guide rod 6. The second limit end 62 is a circular ring-shaped limit plate which is arranged by extending the side wall of the other end of the guide rod 6 to the periphery, and the circular ring-shaped limit plate simultaneously plays a role in limiting the other end of the contact spring 3 and limiting the guide rod by matching with the guide plate 7. The second position-limiting end 62 can also be provided with other structures, such as a position-limiting block protruding from the side wall of the other end of the guide rod 6.
As shown in fig. 3 and 4, the end of the contact end 63 in contact fit with the contact blade 2 is a circular arc surface. The end part of the contact end 63 in contact fit with the contact blade is designed to be an arc surface, so that the contact resistance of the guide rod 6 and the contact blade is reduced, and the contact between the guide rod 6 and the contact blade 2 is more stable and reliable.
As shown in fig. 4, the movable cavity 103 includes a first cavity 1031 for accommodating the contact spring 3 and a second cavity 1032 for guiding the guide bar 6 when the guide bar 6 moves, and the first position-limiting end 103a is located between the first cavity 1031 and the second cavity 1032. The guide end 61 at one end of the guide bar 6 cooperates with the second cavity 1032, on the one hand, the second cavity 1032 provides space for the guide bar to move, and on the other hand, the second cavity 1032 cooperates with the guide end 61 to guide the guide bar 6.
Two embodiments of the second cavity are given below.
A first embodiment of the second cavity is shown in fig. 4 and 5. The contact mechanism of the universal circuit breaker further comprises a guide sleeve 5, wherein the second cavity 1032 is arranged in a guide groove in the middle of the guide sleeve 5, the guide sleeve 5 comprises a first cylindrical sleeve 51 at one end of the bottom of the movable cavity 103 and a second cylindrical sleeve 52 at the other end, and a first limiting end 103a for limiting one end of the contact spring 3 is formed at the end part of the second cylindrical sleeve 52; when the contact spring is installed, the contact spring 3 is firstly sleeved at one end of the guide rod 6, one end of the guide rod 6 is installed with the guide sleeve 5, and then the guide rod 6, the contact spring 3 and the guide sleeve 5 are installed in the movable cavity 103 together. The other fixed element guide sleeve 5 is additionally arranged, a second cavity matched with the guide end 61 is formed in the middle of the guide sleeve, a first limiting end 103a for limiting one end of the contact spring 3 is formed at the end part of the second round sleeve 52, and the guide sleeve 5 and the guide rod 6 limit the two ends of the contact spring 3 and then are installed in the movable cavity 103 during installation, so that the installation is convenient and rapid. The embodiment shown in the figures shows one contact blade 2 corresponding to two guide bars 6, but it is obvious that one contact blade 2 may also correspond to one guide bar 6 or to a plurality of guide bars 6.
A second embodiment of the second cavity. The second cavity 1032 is a guide groove formed at the bottom of the first cavity 1031, a first limit end 103a for limiting one end of the contact spring 3 is formed at the bottom of the first cavity 1031, the contact spring 3 is firstly sleeved at one end of the guide rod 6 during installation, and one end of the guide rod 6 sleeved with the contact spring 3 is installed in the movable cavity 103. In the second embodiment, the second cavity 1032 is formed by directly arranging the guide groove at the bottom of the first cavity 1031, and this embodiment does not need to add an additional fixing element, and is low in cost.
As shown in fig. 3 and 4, the guide plate 7 is provided on the upper end side of the contact support 1, and the connection mode of the guide plate 7 and the contact support 1 is snap connection or fastening connection. For example, the guide plate 7 may be fastened to the contact holder 1 by a fastening screw, or may be snap-connected to the contact holder 1 by a snap connection structure.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A contact mechanism of a universal circuit breaker comprises a contact support (1), a contact blade (2) and a contact spring (3) which are pivotally arranged on the contact support (1), and is characterized in that: the contact device comprises a contact support (1), a plurality of contact blades (2) and a plurality of guide rods (6), wherein the contact blades (2) are arranged on the contact support (1) side by side, each contact spring (3) is sleeved at one end of each guide rod (6), at least one guide rod (6) corresponds to one contact blade (2), a movable cavity (103) for accommodating one end of each contact spring (3) and one end of each guide rod (6) is arranged on the contact support (1), the guide rods (6) compress the contact springs (3) and can move in the movable cavities (103), and the other ends of the guide rods (6) are provided with contact ends (63) which are in contact fit with the contact blades (2); be equipped with in activity cavity (103) and carry out spacing first spacing end (103a) to the one end of contact spring (3), be equipped with on guide bar (6) and carry out spacing second spacing end (62) to the other end of contact spring (3), one side of the one end of contact piece (2) is equipped with contact (201), the opposite side is towards guide bar (6) and contact spring (3), contact piece (2) rotate contact jaw (63) that touch guide bar (6), guide bar (6) provide contact elasticity for contact piece (2) through compression contact spring (3).
2. The contact mechanism of the conventional circuit breaker according to claim 1, wherein: the contact terminal support structure is characterized by further comprising a guide plate (7) for limiting the guide rod (6), wherein the guide plate (7) is installed on the contact terminal support (1), the guide plate (7) is perpendicular to the guide rod (6), and a through hole (701) through which the contact end (63) of the guide rod (6) penetrates is formed in the guide plate (7).
3. Contact mechanism of a universal circuit breaker according to claim 1 or 2, characterized in that: one end of the guide rod (6) is provided with a guide end (61), the movable cavity (103) comprises a first cavity (1031) for accommodating the contact spring (3) and a second cavity (1032) for guiding the guide end (61) to the guide rod (6) when the guide rod (6) moves, and the first limit end (103a) is positioned between the first cavity (1031) and the second cavity (1032).
4. The contact mechanism of the conventional circuit breaker according to claim 3, wherein: the contact spring is characterized by further comprising a guide sleeve (5), the second cavity (1032) is arranged in a guide groove in the middle of the guide sleeve (5), the guide sleeve (5) comprises a first cylindrical sleeve (51) at one end of the bottom of the movable cavity (103) and a second cylindrical sleeve (52) at the other end of the bottom of the movable cavity, and a first limiting end (103a) for limiting one end of the contact spring (3) is formed at the end of the second cylindrical sleeve (52); during installation, the contact spring (3) is sleeved at one end of the guide rod (6), one end of the guide rod (6) is installed with the guide sleeve (5), and then the guide rod (6), the contact spring (3) and the guide sleeve (5) are installed in the movable cavity (103) together.
5. The contact mechanism of the conventional circuit breaker according to claim 3, wherein: the second cavity (1032) is a guide groove formed in the bottom of the first cavity (1031), a first limiting end (103a) for limiting one end of the contact spring (3) is formed in the bottom of the first cavity (1031), the contact spring (3) is firstly sleeved at one end of the guide rod (6) during installation, and one end of the contact spring (3) sleeved by the guide rod (6) is installed in the movable cavity (103).
6. The contact mechanism of the conventional circuit breaker according to claim 2, wherein: the second limiting end (62) is a circular limiting plate which is formed by extending the side wall of the other end of the guide rod (6) to the periphery, one side of the circular limiting plate is abutted to the contact spring (3) to limit the other end of the contact spring (3), and the other side of the circular limiting plate is matched with the guide plate (7) to limit the guide rod (6).
7. The contact mechanism of the conventional circuit breaker according to claim 2, wherein: the guide plate (7) is a flat plate, the guide plate (7) is arranged on one side of the upper end of the contact support (1), and the guide plate (7) is connected with the contact support (1) in a buckling or fastening mode.
8. The contact mechanism of the conventional circuit breaker according to claim 1, wherein: the guide rod (6) is an insulating guide rod.
9. The contact mechanism of the conventional circuit breaker according to claim 1, wherein: the end part of the contact end (63) in contact fit with the contact blade (2) is an arc surface.
10. The contact mechanism of the conventional circuit breaker according to claim 1, wherein: the middle part of the contact support (1) is provided with a contact blade mounting cavity (101), a plurality of contact blades (2) are arranged in the contact blade mounting cavity (101) side by side, an insulating partition plate is arranged between every two adjacent contact blades (2), and the contact blades (2) and the insulating partition plates are connected to the contact support (1) in a pivoting manner through a rotating shaft; one side of one end of the contact blade (2) is provided with a contact (201), the other side of the contact blade faces the contact end (63) of the guide rod (6), the other end of the contact blade (2) is connected with a connecting conductor (22), and the other end of the connecting conductor (22) is connected with the conductive busbar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610060421.2A CN107017136B (en) | 2016-01-28 | 2016-01-28 | Contact mechanism of universal circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610060421.2A CN107017136B (en) | 2016-01-28 | 2016-01-28 | Contact mechanism of universal circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107017136A CN107017136A (en) | 2017-08-04 |
| CN107017136B true CN107017136B (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610060421.2A Active CN107017136B (en) | 2016-01-28 | 2016-01-28 | Contact mechanism of universal circuit breaker |
Country Status (1)
| Country | Link |
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| CN (1) | CN107017136B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276376A (en) * | 2018-12-04 | 2020-06-12 | 上海良信电器股份有限公司 | Moving contact structure of circuit breaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100486746B1 (en) * | 2002-04-20 | 2005-05-03 | 엘에스산전 주식회사 | Current limiting apparatus of circuit breaker |
| US7569784B2 (en) * | 2006-10-13 | 2009-08-04 | Eaton Corporation | Electrical switching apparatus, and housing and integral pole shaft bearing assembly therefor |
| CN201886994U (en) * | 2010-11-16 | 2011-06-29 | 浙江电器开关有限公司 | Movable contact system of universal circuit breaker |
| CN202018932U (en) * | 2011-04-28 | 2011-10-26 | 上海市电力公司 | Double-breakpoint universal breaker |
| CN205609462U (en) * | 2016-01-28 | 2016-09-28 | 浙江正泰电器股份有限公司 | Conventional circuit -breaker's contact mechanism |
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2016
- 2016-01-28 CN CN201610060421.2A patent/CN107017136B/en active Active
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| Publication number | Publication date |
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| CN107017136A (en) | 2017-08-04 |
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Application publication date: 20170804 Assignee: Wenzhou Zhengtai Electrical Technology Co., Ltd Assignor: Zhejiang Chint Electrics Co.,Ltd. Contract record no.: X2020330000078 Denomination of invention: Contact mechanism of universal circuit breaker Granted publication date: 20200121 License type: Common License Record date: 20201021 |
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