CN117936323A - Double-acting contact direct current contactor - Google Patents
Double-acting contact direct current contactor Download PDFInfo
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- CN117936323A CN117936323A CN202311801607.5A CN202311801607A CN117936323A CN 117936323 A CN117936323 A CN 117936323A CN 202311801607 A CN202311801607 A CN 202311801607A CN 117936323 A CN117936323 A CN 117936323A
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- contact
- movable contact
- double
- movable
- direct current
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052742 iron Inorganic materials 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 15
- 101100327917 Caenorhabditis elegans chup-1 gene Proteins 0.000 description 8
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008033 biological extinction Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention relates to the technical field of direct current contactors, and particularly provides a double-acting contact direct current contactor which comprises an iron cup, wherein the iron cup is provided with an upper cavity and a lower cavity; the upper end of the upper cavity is provided with a fixed contact, and the lower end of the upper cavity is provided with a movable contact; a driving mechanism is arranged in the iron cup, and the output end of the driving mechanism is connected with a movable contact; the movable contact comprises a first movable contact and a second movable contact, and the first movable contact and the second movable contact are both U-shaped; the double-contact design of the movable contact can greatly increase the current-carrying capacity, and the U-shaped double-contact design of the movable contact can improve the contact effect with the stationary contact; the movable contact of the U-shaped structure can reserve space in the middle area, and magnetic steel is placed in the reserved space when the movable contact contacts the stationary contact, so that the compact structure of the direct current contactor is improved, the advantage of small volume of a product body which is a single body is reserved, and the purpose of increasing the current-carrying capacity of the contact is achieved by increasing the contact point position of the contact.
Description
Technical Field
The invention relates to the technical field of direct current contactors, in particular to a double-acting contact direct current contactor.
Background
The dc contactor is a contactor used in a dc circuit, and is mainly used for controlling a dc circuit (a main circuit, a control circuit, an exciting circuit, etc.).
The direct current contactor adopted in the prior art is of a single-contact structure, the current-carrying capacity of the contacts is limited, the product volume can only be increased if the current-carrying capacity is required to be increased, or the product body is expanded into a double-body parallel connection by a single body, and the expansion limit is larger.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a double-acting contact dc contactor, which is used for solving the problem that the contact current-carrying capacity of the dc contactor adopting a single-contact structure in the prior art is limited.
To achieve the above and other related objects, the present invention provides a double-acting contact direct current contactor, comprising an iron cup having an upper cavity and a lower cavity; the upper end of the upper cavity is provided with a fixed contact, and the lower end of the upper cavity is provided with a movable contact; the movable contact comprises a first movable contact and a second movable contact overlapped at the upper end of the first movable contact, and the first movable contact and the second movable contact are both U-shaped;
A driving mechanism is arranged in the iron cup, and the output end of the driving mechanism is connected with a movable contact for driving the movable contact to movably contact with a static contact so as to control the on-off of current;
The driving mechanism includes:
the magnetic steel is arranged in the upper cavity;
the movable iron core is arranged in the lower cavity;
the coil is arranged in the lower cavity, and the movable iron core is movably arranged in a space surrounded by the coil;
and the lower end of the shaft extends to the lower cavity to be connected with the movable iron core in a penetrating way, and the upper end of the shaft extends to the upper cavity to be connected with the movable contact in a penetrating way.
In an embodiment of the invention, the magnetic steel comprises a magnet block and a magnetic ring, wherein the magnet block is arranged at the upper end of the iron cup and is positioned right above the shaft, and the magnetic ring is arranged on the inner wall of the iron cup.
In an embodiment of the invention, the lower end surface of the magnet block is lower than the lower end surface of the stationary contact.
In an embodiment of the invention, an inner supporting component is arranged on the side wall of the upper cavity, and the magnetic ring is assembled on the inner supporting component; the bottom of the upper cavity is provided with a guide plate.
In one embodiment of the invention, a contact pressure spring is arranged on the rod body of the shaft in the upper cavity, and the upper end of the contact pressure spring is connected with a movable contact and the lower end of the contact pressure spring is connected with a gasket.
In an embodiment of the invention, the contact pressure spring comprises a first contact pressure spring and a second contact pressure spring overlapped on the inner side of the first contact pressure spring, wherein the upper end of the first contact pressure spring is connected with a first moving contact of the moving contact and is used for power-off reset of the first moving contact; the upper end of the second contact pressure spring is connected with a second moving contact of the moving contact and is used for power-off reset of the second moving contact.
In an embodiment of the invention, a reaction spring is arranged on the rod body of the shaft in the lower cavity, and the lower end of the reaction spring is connected with the movable iron core.
In an embodiment of the invention, the upper end of the lower cavity is provided with a magnetic conduction sheet, the magnetic conduction sheet is assembled at the lower end of the guide plate, and the upper end of the reaction spring is connected with the magnetic conduction sheet.
In one embodiment of the invention, a fixed ring is arranged at the upper end of the iron cup, and the stationary contact is assembled on the fixed ring; the upper end of the fixing ring is provided with an upper cover.
In an embodiment of the invention, a shell is sleeved outside the iron cup.
As described above, the double-acting contact direct current contactor of the invention has the following beneficial effects:
1. The movable contact is arranged as the double contacts, so that the contact point position can be directly increased in the direct current contactor, the purpose of increasing the current carrying capacity of the movable contact is realized, the temperature rising performance is improved, the purpose of dispersing the current passing through the contacts to a plurality of positions is achieved, the effect of reducing the current value born by each contact point when the contact points are disconnected is achieved, and the effect of improving the overall disconnected current is realized; the double contacts of the movable contact are arranged in a U shape, so that the contact area of the two ends of the movable contact relative to the fixed contact can be increased, the contact effect of the movable contact and the fixed contact is improved, the heat dissipation effect after the contact separation of the movable contact and the fixed contact is improved, and the use safety of the direct current contactor is improved; in addition, because the contact is in the sealed environment, the direct current contactor breaks direct current, the physical phenomenon of continuous arcing is easy to happen, the invention adopts the movable contact design of the U-shaped structure to enlarge the gap between the movable contact and the movable contact, and physically prolongs the arcing path of the electric arc from space, so as to realize the effect of rapid arc extinction, and simultaneously promote the performance of breaking current of products.
2. According to the double-acting contact direct current contactor provided by the invention, the double-contact design of the movable contact can greatly increase the current-carrying capacity, and the U-shaped double-contact design of the movable contact can improve the contact effect with the stationary contact; the movable contact of U-shaped structure can reserve the space in the intermediate region, and the magnet steel is placed in the reserved space when the movable contact contacts the stationary contact, has improved direct current contactor's compact structure and has felt, has both kept the product body like this and has been the free small volume advantage, reaches the purpose of the current-carrying capacity of increase contact through the contact point position that increases the contact again, reasonable in design, and the structure is exquisite, and the practicality is high.
Drawings
Fig. 1 shows a schematic external structure of a double-acting contact direct current contactor disclosed in the invention.
Fig. 2 shows a partially exploded schematic view of a double-acting contact dc contactor of the present disclosure.
Fig. 3 shows a schematic cross-sectional view of a double-acting contact dc contactor of the present disclosure.
Fig. 4 shows an enlarged view at a in fig. 3.
Description of element reference numerals
An iron cup 1; an upper cavity 11; a lower cavity 12; a stationary contact 2; a movable contact 3; a first movable contact 31; a second movable contact 32; magnetic steel 4; a magnet block 41; a magnetic ring 42; a movable iron core 5; a coil 6; a shaft 7; a reaction force spring 8; an inner support assembly 9; a housing 10; a guide plate 13; a spacer 14; a contact pressure spring 15; a first contact pressure spring 151; a second contact pressure spring 152; a fixing ring 16; an upper cover 17; magnetic conductive sheet 18.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to fig. 1 to 4. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Referring to fig. 1-4, the present invention provides a double-acting contact direct current contactor, which comprises an iron cup 1, wherein the iron cup 1 is provided with an upper cavity 11 and a lower cavity 12; a fixed contact 2 is arranged at the upper end of the upper cavity 11, and a movable contact 3 is arranged at the lower end of the upper cavity; specifically, a fixed ring 16 is arranged at the upper end of the iron cup 1, and the stationary contact 2 is assembled on the fixed ring 16; an upper cover 17 is arranged at the upper end of the fixed ring 16.
A driving mechanism is arranged in the iron cup 1, and the output end of the driving mechanism is connected with a movable contact 3 and is used for driving the movable contact 3 to movably contact with a fixed contact 2 so as to control the on-off of current and further control the on-off of a switch; the outer part of the iron cup 1 is sleeved with a shell 10, so that the use safety of the direct current contactor is improved.
The movable contact 3 comprises a first movable contact 31 and a second movable contact 32 overlapped at the upper end of the first movable contact 31, and by arranging the movable contact 3 as a double contact, the contact point position can be directly increased in the direct current contactor, so that the purpose of increasing the current carrying capacity of the movable contact is realized, the temperature rise performance is improved, the purpose of dispersing the current passing through the contact to a plurality of positions is realized, the effect of reducing the current value born by each contact point when the contact point is disconnected is realized, and the effect of improving the integral disconnection current is realized; by arranging the double contacts of the movable contact 3 into a U shape, the contact area of the two ends of the movable contact 3 with respect to the fixed contact can be increased by the movable contact 3 with a U-shaped structure, the contact effect of the movable contact 3 and the fixed contact 2 is improved, the heat dissipation effect after the contact separation of the movable contact 3 and the fixed contact 2 is improved, and the use safety of the direct current contactor is improved; in addition, because the contact is in the sealed environment, the direct current contactor breaks direct current, the physical phenomenon of continuous arcing is easy to happen, the invention adopts the movable contact design of the U-shaped structure to enlarge the gap between the movable contact and the movable contact, and physically prolongs the arcing path of the electric arc from space, so as to realize the effect of rapid arc extinction, and simultaneously promote the performance of breaking current of products.
The driving mechanism comprises magnetic steel 4, a movable iron core 5, a coil 6 and a shaft 7, wherein the magnetic steel 4 is arranged in an upper cavity 11, the movable iron core 5 and the coil 6 are both arranged in a lower cavity 12, and the movable iron core 5 is movably arranged in a space surrounded by the coil 6; the lower end of the shaft 7 extends into the lower cavity 12 to be connected with the movable iron core 5 in a penetrating way, and the upper end extends into the upper cavity 11 to be connected with the movable contact 3 in a penetrating way; when the control circuit applies current, a magnetic field is generated in the coil 6, the movable iron core 5 is attracted to move towards the magnetic guide sheet 18, and the movable contact 3 is contacted and closed with the fixed contact 2, so that the conduction of the control circuit is controlled; when the control circuit is powered off, the magnetic field inside the coil 6 disappears, the movable contact 3 is restored to the original position, and the circuit is interrupted; a counter-force spring 8 is arranged on a rod body of the shaft 7 in the lower cavity 12, and the upper end of the counter-force spring 8 is connected with the top of the lower cavity 12; the reaction spring 8 adopts a reaction spring, and the reaction spring is used for pulling the shaft 7 to reset after the coil is powered off.
The magnetic steel 4 comprises a magnet block 41 and a magnetic ring 42, wherein the magnetic ring 42 is two tile-shaped magnetic steels, the magnet block 41 is a square magnetic steel, and the magnet block 41 and the magnetic ring 42 are matched to form an inner chamber with uniform strong magnetic field intensity, so that the arc starting path of an arc is prolonged, and the arc is rapidly broken; the magnet block 41 is arranged at the upper end of the iron cup 1 and is positioned right above the shaft 7, the magnetic ring 42 is arranged on the inner wall of the iron cup 1, and specifically, the side wall of the upper cavity 11 is provided with an inner supporting component 9, and the magnetic ring 42 is assembled on the inner supporting component 9; the lower end surface of the magnet block 41 is lower than the lower end surface of the stationary contact 2.
The bottom of the upper cavity 11 is provided with a guide plate 13, the central area of the guide plate 13 is provided with a gasket 14, and the shaft 7 is movably penetrated in the gasket 14 to be movably assembled relative to the guide plate 13.
A contact pressure spring 15 is arranged on a rod body of the shaft 7 in the upper cavity 11, and the upper end of the contact pressure spring 15 is connected with the movable contact 3 and the lower end is connected with a gasket 14; specifically, the contact pressure spring 15 includes a first contact pressure spring 151 and a second contact pressure spring 152 overlapped on the inner side of the first contact pressure spring 151, where the upper end of the first contact pressure spring 151 is connected with the first moving contact 31 of the moving contact 3, and is used for power-off reset of the first moving contact 31; the upper end of the second contact pressure spring 152 is connected with the second moving contact 32 of the moving contact 3, and is used for the outage reset of the second moving contact 32, and the double-acting contacts of the moving contact 3 can be reset in a distributed manner, so that the reset effect of the moving contact 3 is improved. The shaft 7 is arranged in the lower cavity 12, a counter-force spring 8 is arranged on the shaft body, the upper end of the counter-force spring 8 is connected with a magnetic conductive sheet 14, and the lower end of the counter-force spring is connected with the movable iron core 5 for the power-off reset of the shaft 7.
The upper end of the lower cavity 12 is provided with a magnetic conduction sheet 18, and the magnetic conduction sheet 18 is assembled at the lower end of the guide plate 13.
In summary, according to the double-acting-contact direct-current contactor provided by the invention, the double-contact design of the movable contact 3 can greatly increase the current-carrying capacity, and the U-shaped double-contact design of the movable contact 3 can improve the contact effect with the fixed contact 2; the movable contact 3 of U-shaped structure can reserve the space in the intermediate region, and magnet steel 4 is placed in the reserved space when movable contact 3 contacts stationary contact 2, has improved direct current contactor's compact structure and has felt, has both kept the product body like this and has been the free advantage of small volume, reaches the purpose of the current-carrying capacity of increase contact through increasing the contact point position of contact again, reasonable in design, the structure is exquisite, and the practicality is high. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A double-acting contact direct current contactor, characterized in that: comprises an iron cup (1), wherein the iron cup (1) is provided with an upper cavity (11) and a lower cavity (12); a stationary contact (2) is arranged at the upper end of the upper cavity (11), and a movable contact (3) is arranged at the lower end of the upper cavity; the movable contact (3) comprises a first movable contact (31) and a second movable contact (32) overlapped at the upper end of the first movable contact (31), and the first movable contact (31) and the second movable contact (32) are both U-shaped;
A driving mechanism is arranged in the iron cup (1), and the output end of the driving mechanism is connected with a movable contact (3) and is used for driving the movable contact (3) to movably contact with a fixed contact (2) so as to control current on-off;
The driving mechanism includes:
The magnetic steel (4) is arranged in the upper cavity (11);
the movable iron core (5) is arranged in the lower cavity (12);
The coil (6) is arranged in the lower cavity (12), and the movable iron core (5) is movably arranged in a space surrounded by the coil (6);
The lower end of the shaft (7) extends to the lower cavity (12) to be connected with the movable iron core (5) in a penetrating way, and the upper end of the shaft extends to the upper cavity (11) to be connected with the movable contact (3) in a penetrating way.
2. The double-acting contact direct current contactor according to claim 1, wherein: the magnetic steel (4) comprises a magnet block (41) and a magnetic ring (42), wherein the magnet block (41) is arranged at the upper end of the iron cup (1) and is positioned right above the shaft (7), and the magnetic ring (42) is arranged on the inner wall of the iron cup (1).
3. The double-acting contact direct current contactor according to claim 1, wherein: the lower end face of the magnet block (41) is lower than the lower end face of the stationary contact (2).
4. The double-acting contact direct current contactor according to claim 2, wherein: an inner supporting component (9) is arranged on the side wall of the upper cavity (11), and a magnetic ring (42) is assembled on the inner supporting component (9); the bottom of the upper cavity (11) is provided with a guide plate (13).
5. The double-acting contact direct current contactor of claim 4, wherein: the shaft (7) is positioned on the rod body in the upper cavity (11), a contact pressure spring (15) is arranged on the rod body, the upper end of the contact pressure spring (15) is connected with the movable contact (3), and the lower end of the contact pressure spring is placed on the gasket (14).
6. The double-acting contact direct current contactor according to claim 5, wherein: the contact pressure spring (15) comprises a first contact pressure spring (151) and a second contact pressure spring (152) overlapped on the inner side of the first contact pressure spring (151), wherein the upper end of the first contact pressure spring (151) is connected with a first moving contact (31) of the moving contact (3) and is used for power-off reset of the first moving contact (31); the upper end of the second contact pressure spring (152) is connected with the second moving contact (32) of the moving contact (3) and is used for the outage reset of the second moving contact (32).
7. The double-acting contact direct current contactor of claim 4, wherein: a counter-force spring (8) is arranged on a rod body of the shaft (7) positioned in the lower cavity (12), and the lower end of the counter-force spring (8) is connected with the movable iron core (5).
8. The double-acting contact direct current contactor of claim 4, wherein: the upper end of the lower cavity (12) is provided with a magnetic conduction sheet (18), the magnetic conduction sheet (18) is assembled at the lower end of the guide plate (13), and the upper end of the counter force spring (8) is connected with the magnetic conduction sheet (18).
9. The double-acting contact direct current contactor according to claim 1, wherein: the upper end of the iron cup (1) is provided with a fixed ring (16), and the fixed contact (2) is assembled on the fixed ring (16); an upper cover (17) is arranged at the upper end of the fixing ring (16).
10. The double-acting contact direct current contactor according to claim 1, wherein: a shell (10) is sleeved outside the iron cup (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311801607.5A CN117936323A (en) | 2023-12-25 | 2023-12-25 | Double-acting contact direct current contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311801607.5A CN117936323A (en) | 2023-12-25 | 2023-12-25 | Double-acting contact direct current contactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117936323A true CN117936323A (en) | 2024-04-26 |
Family
ID=90752884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311801607.5A Pending CN117936323A (en) | 2023-12-25 | 2023-12-25 | Double-acting contact direct current contactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117936323A (en) |
-
2023
- 2023-12-25 CN CN202311801607.5A patent/CN117936323A/en active Pending
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