CN107749354B - Switch contact structure with automatic cleaning function - Google Patents
Switch contact structure with automatic cleaning function Download PDFInfo
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- CN107749354B CN107749354B CN201711167838.XA CN201711167838A CN107749354B CN 107749354 B CN107749354 B CN 107749354B CN 201711167838 A CN201711167838 A CN 201711167838A CN 107749354 B CN107749354 B CN 107749354B
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- contact
- moving contact
- support
- moving
- connecting rod
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/18—Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
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- Push-Button Switches (AREA)
- Contacts (AREA)
Abstract
The invention discloses a switch contact structure with an automatic cleaning function, which comprises a static contact support and a moving contact support, wherein a static contact is arranged on the static contact support, a moving contact is rotatably arranged on the moving contact support through a second rotating shaft, the bottom end of the moving contact support is fixedly connected with a connecting rod, the tail end of the connecting rod is rotatably connected with a fixed support through a first rotating shaft, the middle part of the connecting rod is rotatably connected with a push rod through a third rotating shaft, the push rod is movably arranged on the fixed support, the bottom end of the moving contact is provided with a stop part which is abutted against the moving contact support, and the front end of the connecting rod or/and the bottom end of the push; the invention has simple and reasonable structure, can remove metal oxide and dirt on the surface of the electric conductor by utilizing the mutual twisting between the contact surfaces of the static contact and the moving contact when the switch is switched on and off, realizes the self-cleaning of the contact, ensures good electric conduction effect, reduces the temperature rise of the contact in the use process, and is beneficial to prolonging the service life of the switch.
Description
Technical Field
The invention belongs to the technical field of power equipment, and particularly relates to a switch contact structure with an automatic cleaning function.
Background
At present, a large number of switching devices such as various disconnecting switches, circuit breakers, and contactors are used in power systems. The contact structure of the switch device generally comprises a moving contact and a fixed contact, the contact of some switch devices is a direct-acting structure, and the contact of some switch devices is a clapper structure.
The following problems can occur in the contact during long-term use: when the switch is disconnected in an on-load or overload state, metal particle protrusions or foreign matters are generated on the surface of the contact under the action of electric arcs, and meanwhile, the surface oxidation phenomenon is easy to occur due to the fact that the surface of the contact is exposed in the air, the contact failure or the contact resistance is increased due to the reasons, the contact is overheated, and the normal operation of the switch device is seriously influenced if the switch is not cleaned in time.
The contact devices of some existing switch devices are provided with special cleaning mechanisms, and the structures of the cleaning mechanisms are complex.
Disclosure of Invention
The invention aims to design a switch contact structure with an automatic cleaning function according to the defects of the prior art, which can automatically clean metal particles, foreign matters and an oxide layer on the surface of a contact on the surface of the contact.
The technical scheme adopted by the invention for solving the technical problems is as follows: the switch contact structure with the automatic cleaning function comprises a static contact support and a moving contact support, wherein a static contact is fixedly arranged on the static contact support, a moving contact matched with the static contact for use is arranged on the moving contact support in a rotating mode through a second rotating shaft, a connecting rod is fixedly connected to the bottom end of the moving contact support, the tail end of the connecting rod is rotatably connected with a fixed support through a first rotating shaft, the middle of the connecting rod is rotatably connected with a push rod capable of moving up and down relative to the fixed support through a third rotating shaft, the push rod is movably arranged on the fixed support, a stop portion abutted against the moving contact support is arranged at the bottom end of the moving contact, and the front end of the connecting rod or/and the bottom end of the push.
The switch contact structure with the automatic cleaning function is characterized in that a slope-shaped static contact surface is arranged on a static contact of the switch contact structure, and a slope-shaped moving contact surface matched with the static contact surface is arranged on a moving contact.
The switch contact structure with the automatic cleaning function is characterized in that a contact spring is arranged between a moving contact and a moving contact support.
The switch contact structure with the automatic cleaning function is characterized in that a connecting piece is fixedly arranged at the bottom end of a moving contact support of the switch contact structure, and the connecting rod is fixedly arranged on the connecting piece.
The switch contact structure with the automatic cleaning function is characterized in that a connecting piece of the switch contact structure is connected to a moving contact support through a bolt.
The switch contact structure with the automatic cleaning function is characterized in that a push rod of the switch contact structure is provided with a return spring.
The invention has the beneficial effects that: the invention has simple and reasonable structure, when the switch works, the surfaces of the moving contact and the static contact are automatically cleaned by utilizing the mutual twisting between the contacts when the moving contact and the static contact are conducted and separated, and the conductive contact surface can remove metal oxides and dirt on the surface of a conductive body, thereby ensuring good conductive effect, reducing the temperature rise of the contacts in the use process and being beneficial to prolonging the service life of the switch; and the moving contact can be provided with two or more mutually independent operation power sources so as to improve the breaking capacity and enlarge the application range.
Drawings
FIG. 1 is a schematic view of the invention in broken-away configuration;
FIG. 2 is a schematic structural diagram of the invention at the time of closing;
fig. 3 is a schematic structural diagram of the present invention when further closing.
The figures are numbered: the device comprises a fixed contact support, a fixed contact, a movable contact, a fixed contact support.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, the invention discloses a switch contact structure with an automatic cleaning function, which comprises a static contact support 1, a moving contact support 5, a static contact 2 fixedly arranged on the static contact support 1, and a moving contact 3 rotatably arranged on the moving contact support 5 through a second rotating shaft 12 and used in cooperation with the static contact 2, wherein the bottom end of the moving contact support 5 is fixedly connected with a connecting rod 7 through a connecting piece 6, and the connecting piece 6 is connected to the moving contact support 5 through a bolt. The connecting rod 7 is respectively and rotatably connected with a fixed support 9 and a push rod 8 through a first rotating shaft 11 and a third rotating shaft 10, the connecting rod 7 and the moving contact support 5 can rotate around the first rotating shaft 11, and the push rod 8 is movably arranged on the fixed support 9 and can move up and down relative to the fixed support 9.
The connecting rod 7 can be directly connected with an operation power source, or connected with the operation power source through the third rotating shaft 10 and the push rod 8, or simultaneously connected with two or more operation power sources, thereby greatly improving the breaking capacity of the switch contact structure and expanding the application range.
When the operation power source drives the connecting rod 7 to rotate around the first rotating shaft 11, the connecting rod 7 drives the moving contact support 5 to rotate, and the moving contact support 5 drives the moving contact 3 to move through the second rotating shaft 12. The operation power source can also drive the push rod 8, and the push rod 8 drives the connecting rod 7 to rotate around the first rotating shaft 11 through the third rotating shaft 10.
The static contact 2 is provided with a slope-shaped static contact surface 21, and the moving contact 3 is provided with a slope-shaped moving contact surface 31 matched with the static contact surface 21. The moving contact support 5 drives the moving contact 3 to rotate around the first rotating shaft 11, and when the moving contact support 5 rotates to the point that the upper part of the moving contact 3 collides with the upper part of the static contact 2, the moving contact 3 starts to rotate around the second rotating shaft 12. When the moving contact support 5 continues to rotate, the moving contact surface 31 and the static contact surface 21 rub against each other, and the contact position moves from the initial upper part to the middle part to the lower part, so that the self-cleaning of the contact is realized.
And a contact spring 4 is arranged between the moving contact 3 and the moving contact bracket 5. The bottom end of the moving contact 3 is provided with a stop part 13 matched with the moving contact support 5. The contact spring 4 gives the moving contact 3 a spring force, and the stop part 13 gives the moving contact 3 initial positioning. The moving contact 3 is connected with the moving contact support 5 through a second rotating shaft 12, the moving contact 3 is contacted with the moving contact support 5 through the stop part 13 of the moving contact under the action of the contact spring 4 and stops, and the moving contact 3 can overcome the action of the spring force after colliding with the static contact 2 and rotates around the second rotating shaft 12.
During operation, the movable contact 3, together with the contact support 5 and the connecting rod 7, rotates around the first rotating shaft 11, and simultaneously, the movable contact 3 contacts the fixed contact 2 and rotates around the second rotating shaft 12. As shown in fig. 1, when the switch is opened, the stationary contact surface 21 and the movable contact surface 31 are separated. According to fig. 2, when the switch is just closed, the connecting rod 7 rotates together with the moving contact 3 and the moving contact support 5, and the moving contact 3 makes contact with the stationary contact 2 and forms a first contact point 14. According to fig. 3, when the switch is further closed, the connecting rod 7 continues to rotate together with the moving contact 3 and the moving contact support 5, the moving contact 3 starts to rotate around the second rotating shaft 12 under the obstruction of the stationary contact 12, and the contact point between the moving contact 31 and the stationary contact surface 21 is transferred from the first contact point 14 at the beginning of the contact to the second contact point 15 at the end of the movement. In the whole process, the metal oxide and the dirt on the conductive contact surface are removed by friction or collision between the static contact surface 21 and the moving contact surface 31, so that the cleaning of the conductive contact surface is realized.
In addition, a return spring is arranged on the push rod 8, so that the push rod 8 can be quickly returned downwards when the switch is switched off.
The above-described embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention, and these embodiments are within the scope of the present invention.
Claims (3)
1. Switch contact structure with self-cleaning function, its characterized in that: the device comprises a static contact support (1) and a moving contact support (5), wherein a static contact (2) is fixedly arranged on the static contact support (1), a moving contact (3) matched with the static contact (2) is rotatably arranged on the moving contact support (5) through a second rotating shaft (12), a contact spring (4) is arranged between the moving contact (3) and the moving contact support (5), a slope-shaped static contact surface (21) is arranged on the static contact (2), a slope-shaped moving contact surface (31) matched with the static contact surface (21) is arranged on the moving contact (3), a connecting rod (7) is fixedly connected to the bottom end of the moving contact support (5), a fixed support (9) is rotatably connected to the tail end of the connecting rod (7) through a first rotating shaft (11), and a push rod (8) capable of moving up and down relative to the fixed support (9) is rotatably connected to the middle of the connecting rod (7) through a third rotating shaft (10 The push rod (8) is movably arranged on the fixed support (9), a return spring is arranged on the push rod (8), a stop part (13) which is abutted against the moving contact support (5) is arranged at the bottom end of the moving contact (3), and the front end of the connecting rod (7) or/and the bottom end of the push rod (8) are/is connected with an operation power source.
2. The switch contact structure with the automatic cleaning function according to claim 1, wherein a connecting piece (6) is fixedly arranged at the bottom end of the movable contact support (5), and the connecting rod (7) is fixedly arranged on the connecting piece (6).
3. The switch contact structure with automatic cleaning function according to claim 2, characterized in that the connecting piece (6) is connected to the movable contact support (5) by a bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711167838.XA CN107749354B (en) | 2017-11-21 | 2017-11-21 | Switch contact structure with automatic cleaning function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711167838.XA CN107749354B (en) | 2017-11-21 | 2017-11-21 | Switch contact structure with automatic cleaning function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107749354A CN107749354A (en) | 2018-03-02 |
| CN107749354B true CN107749354B (en) | 2020-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711167838.XA Active CN107749354B (en) | 2017-11-21 | 2017-11-21 | Switch contact structure with automatic cleaning function |
Country Status (1)
| Country | Link |
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| CN (1) | CN107749354B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115363481B (en) * | 2021-05-19 | 2023-12-19 | 添可智能科技有限公司 | Cleaning device and detachable piece |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207441489U (en) * | 2017-11-21 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of switch contact structure with automatic cleaning function |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2102561U (en) * | 1991-09-24 | 1992-04-22 | 朱宇传 | Multifunctional knob switch |
| KR101193450B1 (en) * | 2010-10-05 | 2012-10-24 | 엘에스산전 주식회사 | Slide type movable contactor assembly for balanced contact force |
| CN204927077U (en) * | 2015-09-12 | 2015-12-30 | 乐清市正雁电器有限公司 | Frame -type circuit breaker's contact system |
| CN205069400U (en) * | 2015-10-13 | 2016-03-02 | 武汉长海电气科技开发有限公司 | Direct current load switch structure of contact terminal |
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2017
- 2017-11-21 CN CN201711167838.XA patent/CN107749354B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207441489U (en) * | 2017-11-21 | 2018-06-01 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | A kind of switch contact structure with automatic cleaning function |
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| Publication number | Publication date |
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| CN107749354A (en) | 2018-03-02 |
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