CN219610318U - High-voltage direct-current relay with double-acting contact structure - Google Patents
High-voltage direct-current relay with double-acting contact structure Download PDFInfo
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- CN219610318U CN219610318U CN202320867183.1U CN202320867183U CN219610318U CN 219610318 U CN219610318 U CN 219610318U CN 202320867183 U CN202320867183 U CN 202320867183U CN 219610318 U CN219610318 U CN 219610318U
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- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims description 43
- 230000003068 static effect Effects 0.000 claims description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229920006335 epoxy glue Polymers 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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Abstract
The utility model relates to a high-voltage direct-current relay with a double-acting contact structure, which comprises a shell with a sealing chamber, an electromagnetic driving mechanism, a supporting cover arranged on the electromagnetic driving mechanism, two fixed contacts arranged on the supporting cover, and a movable contact assembly arranged in the supporting cover and matched with the two fixed contacts, wherein the movable contact assembly comprises a first movable contact, a second movable contact which is in linkage fit with a push rod of the electromagnetic driving mechanism and is attached in the first movable contact, a first contact spring arranged between the first movable contact and the push rod of the electromagnetic driving mechanism, and a second contact spring arranged between the second movable contact and the push rod, wherein both ends of the first movable contact and the second movable contact are respectively provided with a first contact piece and a second contact piece bent towards the directions of the two fixed contacts, and the two fixed contacts are provided with fixed contact parts matched with the first contact piece and the second contact piece. The utility model has the advantages of simple structure, stable and reliable performance, small contact resistance and strong short-circuit current resistance.
Description
Technical Field
The utility model relates to the technical field of relays, in particular to a high-voltage direct-current relay with a double-acting contact structure.
Background
The relay is used as an electronic control device, and the medium (tool) used has electricity, light, magnetism, heat and the like (i.e. input quantity), and the transmission and control are circuits or signals (i.e. output quantity), and the relay is provided with a control system (also known as an input loop) and a controlled system (also known as an output loop), and the two loops are coupled through an internal mechanical or electronic device to realize linkage of states of the two loops. Relays are commonly used in automatic control circuits. The automatic switch is equivalent to an automatic switch, and plays roles of automatic adjustment, safety protection, circuit switching and the like in a circuit. Along with the rapid development of new energy industry, the high-voltage direct-current relay is widely applied to the fields of new energy automobiles, charging corollary equipment, photovoltaic/wind power generation systems, engineering vehicles, UPS and the like. In the output circuit of the relay, the contact resistance of the contact point accounts for about 70% of the whole circuit. The output loop of the existing high-voltage direct-current relay adopts a single-contact structure design, the contact area of a moving contact and a fixed contact is small, the contact resistance is large, when the single contact passes through large current, the electric repulsive force is large, the tolerance capability is weak, and the short-circuit current resistance capability is weak.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the high-voltage direct current relay with the double-acting contact structure, which has the advantages of simple structure, stable and reliable performance, small contact resistance and strong short-circuit current resistance.
In order to achieve the above purpose, the high-voltage direct current relay adopting the double-acting contact structure comprises a shell with a sealing chamber, an electromagnetic driving mechanism arranged in the sealing chamber, a supporting cover arranged on the electromagnetic driving mechanism, two fixed contacts arranged on the supporting cover, and a movable contact assembly arranged in the supporting cover and matched with the two fixed contacts, wherein the movable contact assembly comprises a first movable contact, a second movable contact which is matched with a push rod of the electromagnetic driving mechanism in a linkage manner and is attached to the first movable contact, a first contact spring arranged between the first movable contact and the push rod of the electromagnetic driving mechanism, and a second contact spring arranged between the second movable contact and the push rod, and the two ends of the first movable contact and the second movable contact are respectively provided with a first contact and a second contact which are bent towards the directions of the two fixed contacts, and the two fixed contacts are provided with fixed contact parts matched with the first contact and the second contact.
The beneficial effects of the structure are as follows: by adopting the double-acting contact structure design, the first movable contact and the second movable contact adopt the parallel structure design, the area of a contact point can be effectively increased, the contact resistance is smaller, and the current carrying capacity of the product is improved. When short-circuit current occurs, the first movable contact and the second movable contact can shunt current, and electric repulsive force is smaller, so that the short-circuit current resistance is improved. Therefore, the high-voltage direct-current relay has the advantages of simple structure, stable and reliable performance, small contact resistance and strong short-circuit current resistance.
In particular, the distance between the first contact piece and the static contact portions of the two static contacts is smaller than that between the second contact piece and the static contact portions of the two static contacts. When the switch is closed, the first contact piece of the first movable contact piece is firstly communicated with the two fixed contacts, and the second contact piece of the second movable contact piece is communicated with the two fixed contacts; when the brake is opened, the first contact piece of the first movable contact piece is disconnected with the two fixed contacts, the second contact piece of the second movable contact piece is disconnected with the two fixed contacts, the first movable contact piece and the second movable contact piece can move independently and are not affected by each other, and can be contacted with the two fixed contacts respectively, so that good contact can be kept in the use process, the phenomenon of poor contact between the movable contact piece and the fixed contact due to abrasion or manufacturing errors of any first movable contact piece and second movable contact piece is avoided, and the use reliability of products is improved.
In particular, the first contact piece and the second contact piece are respectively provided with cambered surface contact surfaces matched with the static contact parts of the two static contacts. The first contact piece and the second contact piece are provided with cambered surface contact surfaces which are contacted with the static contact parts, so that the contact reliability of the first movable contact piece, the second movable contact piece and the two static contacts can be improved.
Specifically, a ceramic cover is arranged in the support cover corresponding to the two ends of the first movable contact piece and the second movable contact piece respectively, the first contact piece and the second contact piece at the two ends of the first movable contact piece and the second movable contact piece extend into the two ceramic covers respectively, the first movable contact piece and the second movable contact piece move along with the first movable contact piece and the second movable contact piece and can reciprocate in the ceramic covers, and the static contact parts of the two static contacts extend into the ceramic covers. The two ends of the first movable contact piece and the second movable contact piece are respectively arranged in the two ceramic covers, so that the contact reliability of the first movable contact piece, the second movable contact piece and the two fixed contacts is improved.
Particularly, the ceramic cover comprises a ceramic bottom cover and a ceramic cover body arranged on the ceramic bottom cover, a cavity matched with the action tracks of the first movable contact piece and the second movable contact piece is formed between the ceramic bottom cover and the ceramic cover body, and a guide groove for the first movable contact piece and the second movable contact piece to pass through is formed in one side of the ceramic cover body. The ceramic cover is composed of a ceramic bottom cover and a ceramic cover body, and adopts a split structural design, so that the first movable contact piece is convenient. And the second movable contact piece is assembled with the ceramic cover, so that the assembly efficiency is higher.
Particularly, a positioning plate is arranged on the second movable contact, two pull plates are arranged on the push rod of the electromagnetic driving mechanism, which correspond to the two ends of the positioning plate, clamping holes are formed in the two pull plates and are clamped at the two ends of the positioning plate, and the positioning plate and the pull plates are in linkage fit. The push rod is provided with two pull plates clamped on the positioning plate, so that the positioning plate and the two pull plates are convenient to assemble, and the transmission reliability of the push rod and the positioning plate can be ensured.
Particularly, a positioning boss is arranged on the second movable contact, a positioning hole is arranged on the positioning plate, and the positioning boss is clamped in the positioning hole and forms limit fit of the second movable contact and the positioning plate. The locating plate and the second movable contact piece are assembled in a limit fit mode, so that the locating plate and the second movable contact piece are convenient to assemble, and the assembly efficiency is higher.
Particularly, the push rod of the electromagnetic driving mechanism is provided with a positioning groove corresponding to the first contact spring, a positioning round table is arranged in the positioning groove corresponding to the second contact spring, a through hole for the second contact spring to pass through is formed in the first movable contact piece, one end of the second contact spring passes through the through hole and is abutted against in a positioning groove of the second movable contact piece, the other end of the second contact spring passes through the first contact spring and is clamped on the positioning round table, a positioning step is arranged in the through hole, one end of the first contact spring is abutted against in the positioning step, and the other end of the first contact spring is abutted against in the positioning groove. The first contact spring is clamped between the push rod and the first movable contact piece, the second contact spring is clamped between the push rod and the second movable contact piece, so that the contact pressure of the first movable contact piece and the second movable contact piece can be increased, the contact resistance can be reduced, and the working reliability of the high-voltage direct-current relay can be improved.
The shell comprises a shell, a fixed cover plate arranged on the shell and an iron cup arranged in the shell, wherein epoxy glue is filled between the shell and the iron cup and between the shell and the fixed cover plate, the two fixed contacts are provided with wiring parts extending out of the fixed cover plate, and the fixed cover plate is provided with a partition plate for separating between the wiring parts of the two fixed contacts. The shell adopts a fully-sealed structural design, thereby being beneficial to improving the insulating property of the shell. And the separation plate can increase the creepage distance between the two fixed contacts.
Drawings
Fig. 1 is a perspective view of an embodiment of the present utility model.
Fig. 2 is a cross-sectional view of an embodiment of the present utility model.
Fig. 3 is an internal structural diagram of an embodiment of the present utility model.
Fig. 4 is an assembly diagram of a movable contact assembly and a stationary contact according to an embodiment of the present utility model.
Fig. 5 is a cross-sectional view of a movable contact assembly according to an embodiment of the present utility model.
Detailed Description
As shown in fig. 1 to 5, an embodiment of the present utility model is a high-voltage dc relay with a double-acting contact structure, which includes a housing 10 having a sealing chamber 100, an electromagnetic driving mechanism 11 disposed in the sealing chamber 100, a supporting cover 12 disposed on the electromagnetic driving mechanism 11, two fixed contacts 13 disposed on the supporting cover 12, and a movable contact assembly 20 disposed in the supporting cover 12 and matched with the two fixed contacts 13, wherein the movable contact assembly 20 includes a first movable contact 21, a second movable contact 22 that is in linkage fit with a push rod 111 of the electromagnetic driving mechanism 11 and is attached in the first movable contact 21, a first contact spring 23 disposed between the first movable contact 21 and the push rod 111 of the electromagnetic driving mechanism 11, and a second contact spring 24 disposed between the second movable contact 22 and the push rod 111, both ends of the first movable contact 21 and the second movable contact 22 respectively have a first contact 211 and a second contact 221 bent toward the two fixed contacts 13, and both ends of the two fixed contacts 13 have a first contact portion 211 and a second contact portion 221 matched with the first contact portion 211. The distance between the first contact piece 21 and the stationary contact portions 131 of the two stationary contacts 13 is smaller than the distance between the second contact piece 22 and the stationary contact portions 131 of the two stationary contacts 13. When the switch is closed, the first contact piece of the first movable contact piece is firstly communicated with the two fixed contacts, and the second contact piece of the second movable contact piece is communicated with the two fixed contacts; when the brake is opened, the first contact piece of the first movable contact piece is disconnected with the two fixed contacts, the second contact piece of the second movable contact piece is disconnected with the two fixed contacts, the first movable contact piece and the second movable contact piece can move independently and are not affected by each other, and can be contacted with the two fixed contacts respectively, so that good contact can be kept in the use process, the phenomenon of poor contact between the movable contact piece and the fixed contact due to abrasion or manufacturing errors of any first movable contact piece and second movable contact piece is avoided, and the use reliability of products is improved. The first contact piece 21 and the second contact piece 22 are respectively provided with cambered surface contact surfaces 200 matched with the static contact portions 131 of the two static contacts 13. The first contact piece and the second contact piece are provided with cambered surface contact surfaces which are contacted with the static contact parts, so that the contact reliability of the first movable contact piece, the second movable contact piece and the two static contacts can be improved. The two ends of the support cover 12 corresponding to the first movable contact piece 21 and the second movable contact piece 22 are respectively provided with a ceramic cover 25, the first contact piece 211 and the second contact piece 221 at the two ends of the first movable contact piece 21 and the second movable contact piece 22 respectively extend into the two ceramic covers 25, the first movable contact piece 21 and the second movable contact piece 22 move along with the first movable contact piece 211 and the second movable contact piece 221 and can reciprocate in the ceramic covers 25, and the static contact point parts 131 of the two static contacts 13 extend into the ceramic covers. The two ends of the first movable contact piece and the second movable contact piece are respectively arranged in the two ceramic covers, so that the contact reliability of the first movable contact piece, the second movable contact piece and the two fixed contacts is improved. The ceramic cover 25 includes a ceramic bottom cover 251, and a ceramic cover 252 disposed on the ceramic bottom cover 251, a cavity 250 matching with the motion tracks of the first movable contact 211 and the second movable contact 221 is formed between the ceramic bottom cover 251 and the ceramic cover 252, and a guide slot 2521 through which the first movable contact 211 and the second movable contact 221 can pass is disposed on one side of the ceramic cover 252. The ceramic cover is composed of a ceramic bottom cover and a ceramic cover body, and adopts a split structural design, so that the first movable contact piece is convenient. And the second movable contact piece is assembled with the ceramic cover, so that the assembly efficiency is higher. The second movable contact 22 is provided with a positioning plate 14, two pull plates 15 are arranged on the push rod 111 of the electromagnetic driving mechanism 11 corresponding to the two ends of the positioning plate 14, and clamping holes 151 clamped on the two ends of the positioning plate 14 are arranged on the two pull plates 15, and form linkage fit between the positioning plate 14 and the pull plates 15. The push rod is provided with two pull plates clamped on the positioning plate, so that the positioning plate and the two pull plates are convenient to assemble, and the transmission reliability of the push rod and the positioning plate can be ensured. The second movable contact 22 is provided with a positioning boss 222, the positioning plate 14 is provided with a positioning hole 141, the positioning boss 222 is clamped in the positioning hole 141, and the second movable contact 22 is in limit fit with the positioning plate 14. The locating plate and the second movable contact piece are assembled in a limit fit mode, so that the locating plate and the second movable contact piece are convenient to assemble, and the assembly efficiency is higher.
As shown in fig. 5, a positioning groove 1111 is formed in the push rod 111 of the electromagnetic driving mechanism 11 corresponding to the first contact spring 23, a positioning round table 1112 is formed in the positioning groove 1111 corresponding to the second contact spring 24, a through hole 212 through which the second contact spring 24 passes is formed in the first movable contact piece 21, one end of the second contact spring 24 passes through the through hole 212 and abuts against in a positioning groove 223 of the second movable contact piece 22, the other end of the second contact spring 24 passes through the first contact spring 23 and is clamped on the positioning round table 1112, a positioning step 2121 is formed in the through hole 212, one end of the first contact spring 23 abuts against in the positioning step 2121, and the other end of the first contact spring 23 abuts against in the positioning groove 1111. The first contact spring is clamped between the push rod and the first movable contact piece, the second contact spring is clamped between the push rod and the second movable contact piece, so that the contact pressure of the first movable contact piece and the second movable contact piece can be increased, the contact resistance can be reduced, and the working reliability of the high-voltage direct-current relay can be improved.
As shown in fig. 1 and 2, the housing 10 includes a casing 101, a fixed cover plate 102 disposed on the casing 101, and an iron cup 103 disposed in the casing 101, wherein epoxy glue 104 is filled between the casing 101 and the iron cup 103 and between the casing 101 and the fixed cover plate 102, the two fixed contacts 13 have connection portions 132 extending outside the fixed cover plate 102, and the fixed cover plate 102 has a partition 1021 separated between the connection portions 132 of the two fixed contacts 13. The shell adopts a fully-sealed structural design, thereby being beneficial to improving the insulating property of the shell. And the separation plate can increase the creepage distance between the two fixed contacts.
By adopting the double-acting contact structure design, the first movable contact and the second movable contact adopt the parallel structure design, the area of a contact point can be effectively increased, the contact resistance is smaller, and the current carrying capacity of the product is improved. When short-circuit current occurs, the first movable contact and the second movable contact can shunt current, and electric repulsive force is smaller, so that the short-circuit current resistance is improved. Therefore, the high-voltage direct-current relay has the advantages of simple structure, stable and reliable performance, small contact resistance and strong short-circuit current resistance.
The foregoing is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or be modified to equivalent embodiments, without departing from the scope of the technology. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model shall fall within the scope of the technical solution of the present utility model.
Claims (9)
1. The utility model provides a high-voltage direct current relay of double acting contact structure, includes the casing that has the seal chamber, sets up electromagnetic drive mechanism in the seal chamber, sets up the supporting cover on electromagnetic drive mechanism, sets up two stationary contacts on the supporting cover, sets up in the supporting cover and with two stationary contact matched with movable contact subassembly, its characterized in that: the movable contact assembly comprises a first movable contact, a second movable contact which is in linkage fit with a push rod of the electromagnetic driving mechanism and is attached to the first movable contact, a first contact spring arranged between the first movable contact and the push rod of the electromagnetic driving mechanism, and a second contact spring arranged between the second movable contact and the push rod, wherein two ends of the first movable contact and the second movable contact are respectively provided with a first contact and a second contact which are bent towards two static contact directions, and the two static contacts are provided with static contact parts which are matched with the first contact and the second contact.
2. The double-acting contactor structure high voltage dc relay of claim 1, wherein: the distance between the first contact piece and the static contact parts of the two static contacts is smaller than that between the second contact piece and the static contact parts of the two static contacts.
3. A double-acting contact structure high voltage direct current relay according to claim 1 or 2, characterized in that: the first contact piece and the second contact piece are respectively provided with cambered surface contact surfaces matched with the static contact parts of the two static contacts.
4. A double-acting contact structure high voltage direct current relay according to claim 1 or 2, characterized in that: the support cover in correspond first movable contact piece, second movable contact piece both ends department be provided with a ceramic cover respectively, first movable contact piece, second movable contact piece both ends first contact piece, second contact piece extend respectively in two ceramic covers, first movable contact piece, second movable contact piece move and can reciprocate in the ceramic cover along with first movable contact piece, second movable contact piece, the stationary contact portion of two stationary contacts extend in the ceramic cover.
5. The double-acting contactor structure high voltage dc relay of claim 4, wherein: the ceramic cover comprises a ceramic bottom cover and a ceramic cover body arranged on the ceramic bottom cover, a cavity matched with the action tracks of the first movable contact piece and the second movable contact piece is formed between the ceramic bottom cover and the ceramic cover body, and a guide groove for the first movable contact piece and the second movable contact piece to pass through is formed in one side of the ceramic cover body.
6. A double-acting contact structure high voltage direct current relay according to claim 1 or 2, characterized in that: the second movable contact piece on be provided with the locating plate, electromagnetic drive's push rod on correspond locating plate both ends department and be provided with two arm-tie, be provided with the card hole of block on the locating plate both ends on two arm-tie, and constitute the linkage cooperation of locating plate and arm-tie.
7. The double-acting contactor structure high voltage dc relay of claim 6, wherein: the second movable contact piece on be provided with the location boss, the locating plate on be provided with the locating hole, the location boss block in the locating hole, and constitute the spacing cooperation of second movable contact piece and locating plate.
8. A double-acting contact structure high voltage direct current relay according to claim 1 or 2, characterized in that: the push rod of the electromagnetic driving mechanism is provided with a positioning groove corresponding to the first contact spring, a positioning round table is arranged in the positioning groove corresponding to the second contact spring, a through hole for the second contact spring to pass through is formed in the first movable contact piece, one end of the second contact spring passes through the through hole and is abutted against the positioning groove of the second movable contact piece, the other end of the second contact spring passes through the first contact spring and is clamped on the positioning round table, a positioning step is arranged in the through hole, one end of the first contact spring is abutted against the positioning step, and the other end of the first contact spring is abutted against the positioning groove.
9. A double-acting contact structure high voltage direct current relay according to claim 1 or 2, characterized in that: the shell comprises a shell, a fixed cover plate arranged on the shell and an iron cup arranged in the shell, wherein epoxy glue is filled between the shell and the iron cup as well as between the shell and the fixed cover plate, two fixed contacts are provided with wiring parts extending out of the fixed cover plate, and the fixed cover plate is provided with a partition plate for separating between the wiring parts of the two fixed contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320867183.1U CN219610318U (en) | 2023-04-13 | 2023-04-13 | High-voltage direct-current relay with double-acting contact structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320867183.1U CN219610318U (en) | 2023-04-13 | 2023-04-13 | High-voltage direct-current relay with double-acting contact structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219610318U true CN219610318U (en) | 2023-08-29 |
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ID=87758070
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320867183.1U Active CN219610318U (en) | 2023-04-13 | 2023-04-13 | High-voltage direct-current relay with double-acting contact structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219610318U (en) |
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2023
- 2023-04-13 CN CN202320867183.1U patent/CN219610318U/en active Active
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