CN218333629U - Moving contact break-able electromagnetic switch - Google Patents
Moving contact break-able electromagnetic switch Download PDFInfo
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- CN218333629U CN218333629U CN202221972613.8U CN202221972613U CN218333629U CN 218333629 U CN218333629 U CN 218333629U CN 202221972613 U CN202221972613 U CN 202221972613U CN 218333629 U CN218333629 U CN 218333629U
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- 230000003068 static effect Effects 0.000 claims abstract description 25
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000000694 effects Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 5
- 239000003292 glue Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Abstract
The utility model relates to a moving contact interruptible formula electromagnetic switch belongs to electromagnetic switch's technical field, and it includes the casing, inside drive chamber and the contact holding chamber of being provided with of casing, the drive intracavity is provided with electromagnet assembly, electromagnet assembly includes the support, be fixed with the electro-magnet on the support, support tip articulates there is the transmission plectrum, the transmission plectrum can be adsorbed by the electro-magnet. This application sets up the moving contact into interruptable formula, it is great when load current, it glues on the static contact to take place the moving contact burning, give the electro-magnet subassembly outage back, the reset spring on movable bridge top resets, promote the movable bridge downstream, in the motion process, reset spring promotes the thrust of movable bridge downstream and is greater than the frictional force between first stopper and the second stopper on the U-shaped connecting piece, thereby make the L shape contact member of U-shaped connecting piece and both sides break away from, thereby accomplish the outage, avoid the circuit to be in the state of circular telegram always.
Description
The technical field is as follows:
the application relates to the technical field of electromagnetic switches, in particular to an electromagnetic switch with a movable contact capable of being disconnected.
Background art:
the electromagnetic switch is also called contactor, it is used to switch on and off the AC/DC main circuit and large capacity control current electrical appliance frequently and remotely, it has the advantages of rapid action, large control capacity, safe and convenient use, and can be operated frequently and remotely, it is mainly used to switch on and off the load current.
When a moving contact and a static contact in an electromagnetic switch are contacted and separated, electric arcs are usually generated between the moving contact and the static contact, the moving contact of the electromagnetic switch can be burnt by high temperature generated by the electric arcs, and even the electromagnetic switch can explode in serious cases, so that most of the existing electromagnetic switches are provided with arc extinguishing shields for extinguishing arcs.
However, in the practical application process, it is found that when the load current is large, the arc extinguishing effect of the arc extinguishing cover is not ideal, and although the explosion of the electromagnetic switch can be reduced to a great extent, the moving contact of the electromagnetic switch is often stuck to the static contact, so that the circuit is always in the electrified state, and the emergency stop key cannot be used.
The utility model has the following contents:
in order to solve the moving contact and static contact burn and glue together, lead to the circuit to be in the problem of on-state always, this application provides a moving contact interruptible formula electromagnetic switch.
The application provides a moving contact formula electromagnetic switch that can break adopts following technical scheme:
the movable contact breakable electromagnetic switch comprises a shell, wherein a driving cavity and a contact accommodating cavity are arranged in the shell, an electromagnet assembly is arranged in the driving cavity, the electromagnet assembly comprises a support, an electromagnet is fixed on the support, a transmission shifting sheet is hinged to the end portion of the support, the transmission shifting sheet can be adsorbed by the electromagnet, a static contact circuit and a movable bridge are arranged in the contact accommodating cavity, the static contact circuit is fixed on the shell, the movable bridge is arranged in the shell in a sliding mode, one end of the transmission shifting sheet is inserted into the movable bridge, through grooves are symmetrically formed in the movable bridge, movable contacts are arranged in the through grooves, each movable contact comprises a U-shaped connecting piece, L-shaped contact pieces are symmetrically clamped on the U-shaped connecting pieces and are used for being in contact with the static contact circuit, and the U-shaped connecting pieces are fixed in the through grooves.
Preferably, a clamping groove is formed in the middle of the U-shaped connecting piece, first limiting blocks are arranged on the inner walls of two sides of the clamping groove, and a second limiting block is arranged on one side, close to the inner wall of the clamping groove, of the L-shaped contact piece.
Through adopting above-mentioned technical scheme, the L shape contact of both sides is inserted in the draw-in groove together, and the first stopper of draw-in groove inner wall both sides is crowded in the top of second stopper, plays the effect that places the second stopper and break away from on the one hand, and on the other hand can grasp two L shape contacts.
Preferably, a supporting piece is arranged at the bottom of the U-shaped connecting piece, a fixing groove is formed in the middle of the supporting piece, the U-shaped connecting piece is fixed in the fixing groove, supporting rods are arranged on two sides of the supporting piece, and the tops of the supporting rods abut against the bottom surface of the L-shaped contact piece.
Through adopting above-mentioned technical scheme, the setting of support piece both sides bracing piece can play the effect of support for the L shape contact on both sides, when avoiding the transmission plectrum to lift the movable bridge, moving contact and static contact striking deformation.
Preferably, a first spring is fixed to the bottom of the support piece, the bottom of the first spring is fixed to the inner wall of the through groove, a telescopic sleeve is arranged inside the first spring, one end of the telescopic sleeve is fixedly connected with the support piece, and the bottom end of the telescopic sleeve is fixed to the inner wall of the through groove.
By adopting the technical scheme, when the moving contact is connected with the static contact circuit, the first spring is compressed, and the first spring can enable the moving contact to be tightly attached to the static contact, so that the stable contact is ensured.
Preferably, a heat conducting rod is fixed at the bottom of the support member and arranged inside the telescopic sleeve, the heat conducting rod penetrates through the through groove and the wall thickness of the shell respectively, and fins are fixed on a rod body of the heat conducting rod, which is located outside the shell.
Through adopting above-mentioned technical scheme, on the heat conduction pole can transmit high temperature to the outside fin of casing rapidly, by the fin with the heat give off the air fast to reduce the risk that the movable contact is burnt.
Preferably, the top of the shell is provided with an emergency start-stop assembly, the emergency start-stop assembly comprises a start key and an emergency stop key, the start key is arranged above the electromagnet, the start key is sleeved with a second spring, the emergency stop key is arranged above the movable bridge, and the emergency stop key is sleeved with a third spring.
By adopting the technical scheme, when the circuit needs to be powered on emergently, the starting key is pressed down, the starting key presses one end of the transmission shifting sheet, the other end of the transmission shifting sheet is tilted to lift the movable bridge, and the movable contact on the movable bridge is contacted with the static contact circuit, so that the circuit is conducted, and the circuit is switched on; similarly, when the circuit needs to be powered off emergently, the emergency stop button is pressed.
Preferably, the top end of the shell is provided with a top cover, the top cover is provided with two mounting grooves, the start key and the emergency stop key are movably arranged in the two mounting grooves respectively, the top end of the movable bridge is fixed with a return spring, and the top end of the return spring is abutted to the top cover.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the movable contact is arranged to be in a disconnectable mode, when the load current is large and the movable contact is burnt and stuck on the static contact, after the electromagnet assembly is powered off, the reset spring at the top end of the movable bridge resets to push the movable bridge to move downwards, and in the moving process, the thrust of the reset spring pushing the movable bridge to move downwards is larger than the friction force between the first limiting block and the second limiting block on the U-shaped connecting piece, so that the U-shaped connecting piece is separated from the L-shaped contact pieces on the two sides, the power off is completed, and the circuit is prevented from being in a powered-on state all the time;
2. through the setting of heat conduction pole, the heat conduction pole can be with on the high temperature of moving contact transmits the outside fin of casing rapidly, give off the heat to the air by the fin fast to reduce the risk that the moving contact is burnt out.
Description of the drawings:
fig. 1 is a schematic overall structure diagram of an embodiment of the present application.
Fig. 2 is a schematic structural diagram of the embodiment of the present application in a state where the housing is hidden.
Fig. 3 is a side view of an embodiment of the present application.
Fig. 4 isbase:Sub>A schematic sectional view ofbase:Sub>A portionbase:Sub>A-base:Sub>A in fig. 3.
Fig. 5 is an enlarged view of a portion a in fig. 4.
Description of reference numerals: 1. a housing; 11. a drive chamber; 111. an electromagnet assembly; 1111. a support; 1112. an electromagnet; 1113. a transmission shifting sheet; 12. a contact accommodating chamber; 121. a static contact circuit; 13. a top cover; 131. mounting grooves; 2. a movable bridge; 21. a return spring; 22. a through groove; 3. starting a key; 31. a second spring; 4. an emergency stop key; 41. a third spring; 5. a moving contact; 51. a U-shaped connector; 511. a card slot; 512. a first stopper; 52. an L-shaped contact; 521. a second limiting block; 6. a support member; 61. a support bar; 7. a first spring; 8. a telescopic sleeve; 9. a heat conducting rod; 10. and a fin.
The specific implementation mode is as follows:
the present application is described in further detail below with reference to figures 1-5.
The embodiment of the application discloses an electromagnetic switch with a movable contact capable of being disconnected, and referring to fig. 1-5, the electromagnetic switch comprises a shell 1, a driving cavity 11 and a contact accommodating cavity 12 are arranged in the shell 1, an electromagnet assembly 111 is arranged in the driving cavity 11, the electromagnet assembly 111 comprises a support 1111, an electromagnet 1112 is fixed on the support 1111, a transmission shifting sheet 1113 is hinged to the end portion of the support 1111, the transmission shifting sheet 1113 can be adsorbed by the electromagnet 1112, a static contact circuit 121 and a movable bridge 2 are arranged in the contact accommodating cavity 12, the static contact circuit 121 is fixed on the shell 1, the movable bridge 2 is arranged in the shell 1 in a sliding manner, one end of the transmission shifting sheet 1113 is inserted in the movable bridge 2, an emergency start-stop component is arranged at the top of the shell 1, the emergency start-stop component comprises a start key 3 and an emergency stop key 4, the start key 3 is arranged above the electromagnet 1112, and a second spring 31 is sleeved on the start key 3, the scram key 4 is arranged above the movable bridge 2, a third spring 41 is sleeved on the scram key 4, a top cover 13 is arranged at the top end of the shell 1, two mounting grooves 131 are formed in the top cover 13, the start key 3 and the scram key 4 are respectively movably arranged in the two mounting grooves 131, a reset spring 21 is fixed at the top end of the movable bridge 2, the top end of the reset spring 21 is abutted against the top cover 13, through grooves 22 are symmetrically formed in the movable bridge 2, moving contacts 5 are arranged in the through grooves 22, each moving contact 5 comprises a U-shaped connecting piece 51, L-shaped contact pieces 52 are symmetrically clamped on the U-shaped connecting piece 51, a clamping groove 511 is formed in the middle of the U-shaped connecting piece 51, the U-shaped connecting piece 51 is elastic, first limiting blocks 512 are arranged on the inner walls at two sides of the clamping groove 511, second limiting blocks 521 are arranged on one side, close to the inner walls of the clamping groove 511, the L-shaped contact pieces 52 at two sides are inserted into the clamping groove 511 together, the first limiting blocks 512 on two sides of the inner wall of the clamping groove 511 are extruded above the second limiting block 521, so that the second limiting block 521 is placed to be separated, the two L-shaped contact pieces 52 can be clamped, the L-shaped contact pieces 52 are used for being in contact with the static contact circuit 121, and the U-shaped connecting piece 51 is fixed in the through groove 22.
Referring to fig. 5, a supporting member 6 is disposed at the bottom of the U-shaped connecting member 51, a fixing groove is formed in the middle of the supporting member 6, the U-shaped connecting member 51 is fixed in the fixing groove, supporting rods 61 are disposed at both sides of the supporting member 6, and the tops of the supporting rods 61 abut against the bottom surface of the L-shaped contact member 52.
The supporting rods 61 on the two sides of the supporting member 6 can support the L-shaped contact members 52 on the two sides, so that the moving contact 5 is prevented from being deformed by colliding with the static contact when the transmission shifting piece 1113 lifts the movable bridge 2.
Referring to fig. 5, a first spring 7 is fixed at the bottom of the support member 6, an elastic force direction of the first spring 7 points to an extending direction of the first spring 7, the bottom of the first spring 7 is fixed with an inner wall of the through groove 22, an expansion sleeve 8 is arranged inside the first spring 7, one end of the expansion sleeve 8 is fixedly connected with the support member 6, the bottom end of the expansion sleeve 8 is fixed with the inner wall of the through groove 22, and the expansion sleeve 8 is used for ensuring a hovering position of the moving contact 5.
When the control circuit of the electromagnet 1112 is powered on, the electromagnet 1112 adsorbs the transmission shifting sheet 1113, the transmission shifting sheet 1113 lifts the movable bridge 2, the movable contact 5 is communicated with the static contact circuit 121, in the process, the first spring 7 is compressed, and the first spring 7 can enable the movable contact 5 to be tightly attached to the static contact, so that the stable contact is ensured.
Referring to fig. 4 and 5, a heat conducting rod 9 is fixed at the bottom of the supporting member 6, the heat conducting rod 9 is arranged inside the telescopic tube 8, the heat conducting rod 9 respectively penetrates through the through groove 22 and the wall thickness of the shell 1, and the heat conducting rod 9 is fixed with the fins 10 on the rod body outside the shell 1.
Moving contact 5 and static contact are when contact and separation, can produce electric arc between moving contact 5 and the static contact usually, and the produced high temperature of electric arc transmits moving contact 5 on, and on heat conduction pole 9 can transmit high temperature to the outside fin 10 of casing 1 rapidly, by fin 10 with the heat give off the air fast to reduce the risk that moving contact 5 was burnt out.
The implementation principle of the electromagnetic switch with the movable contact capable of being disconnected in the embodiment of the application is as follows:
when the load current is large, the moving contact 5 is burnt and stuck on the static contact, after the electromagnet assembly 111 is powered off, the reset spring 21 at the top end of the movable bridge 2 resets to push the movable bridge 2 to move downwards, and in the moving process, the thrust of the reset spring 21 pushing the movable bridge 2 to move downwards is greater than the friction force between the first limit block 512 and the second limit block 521 on the U-shaped connecting piece 51, so that the U-shaped connecting piece 51 is separated from the L-shaped contact pieces 52 on the two sides, and the power off is completed.
The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (7)
1. The utility model provides a moving contact breakable electromagnetic switch, includes casing (1), casing (1) inside is provided with drive chamber (11) and contact holding chamber (12), be provided with electromagnet assembly (111) in drive chamber (11), electromagnet assembly (111) include support (1111), be fixed with electro-magnet (1112) on support (1111), support (1111) tip articulates there is transmission plectrum (1113), transmission plectrum (1113) can be adsorbed by electro-magnet (1112), be provided with static contact circuit (121) and movable bridge (2) in contact holding chamber (12), static contact circuit (121) are fixed on casing (1), movable bridge (2) slide and set up in casing (1), transmission plectrum (1113) one end is pegged graft in movable bridge (2), its characterized in that: the movable bridge is characterized in that through grooves (22) are symmetrically formed in the movable bridge (2), a movable contact (5) is arranged in each through groove (22), each movable contact (5) comprises a U-shaped connecting piece (51), L-shaped contact pieces (52) are symmetrically clamped on the U-shaped connecting pieces (51), each L-shaped contact piece (52) is used for being in contact with a fixed contact circuit (121), and the U-shaped connecting pieces (51) are fixed in the corresponding through grooves (22).
2. The movable contact interruptible electromagnetic switch according to claim 1, wherein: a clamping groove (511) is formed in the middle of the U-shaped connecting piece (51), first limiting blocks (512) are arranged on the inner walls of the two sides of the clamping groove (511), and a second limiting block (521) is arranged on one side, close to the inner wall of the clamping groove (511), of the L-shaped contact piece (52).
3. A movable contact interruptible electromagnetic switch according to claim 2, characterized in that: the U-shaped contact piece (52) is characterized in that a supporting piece (6) is arranged at the bottom of the U-shaped connecting piece (51), a fixing groove is formed in the middle of the supporting piece (6), the U-shaped connecting piece (51) is fixed in the fixing groove, supporting rods (61) are arranged on two sides of the supporting piece (6), and the tops of the supporting rods (61) are abutted to the bottom surface of the L-shaped contact piece (52).
4. A moving contact interruptible electromagnetic switch according to claim 3, characterized in that: support piece (6) bottom is fixed with first spring (7), first spring (7) bottom with it is fixed to lead to groove (22) inner wall, first spring (7) inside is provided with telescopic tube (8), telescopic tube (8) one end with support piece (6) fixed connection, telescopic tube (8) bottom with it is fixed to lead to groove (22) inner wall.
5. The movable contact interruptible electromagnetic switch according to claim 4, wherein: the heat conduction device is characterized in that a heat conduction rod (9) is fixed to the bottom of the supporting piece (6), the heat conduction rod (9) is arranged inside the telescopic sleeve (8), the heat conduction rod (9) penetrates through the through grooves (22) and the wall thickness of the shell (1) respectively, and the heat conduction rod (9) is located on a rod body outside the shell (1) and is fixed with fins (10).
6. The movable contact interruptible electromagnetic switch according to claim 1, wherein: casing (1) top is provided with promptly to open and stops the subassembly, promptly open and stop the subassembly including start button (3) and scram button (4), start button (3) set up the top of electro-magnet (1112), the cover is equipped with second spring (31) on start button (3), scram button (4) set up the top of movable bridge (2), the cover is equipped with third spring (41) on scram button (4).
7. The movable contact interruptible electromagnetic switch according to claim 6, wherein: casing (1) top is provided with top cap (13), two mounting grooves (131) have been seted up on top cap (13), start button (3) and scram button (4) activity respectively set up in two mounting grooves (131), movable bridge (2) top is fixed with reset spring (21), reset spring (21) top with top cap (13) butt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221972613.8U CN218333629U (en) | 2022-07-28 | 2022-07-28 | Moving contact break-able electromagnetic switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221972613.8U CN218333629U (en) | 2022-07-28 | 2022-07-28 | Moving contact break-able electromagnetic switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218333629U true CN218333629U (en) | 2023-01-17 |
Family
ID=84872347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221972613.8U Expired - Fee Related CN218333629U (en) | 2022-07-28 | 2022-07-28 | Moving contact break-able electromagnetic switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218333629U (en) |
-
2022
- 2022-07-28 CN CN202221972613.8U patent/CN218333629U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230117 |
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| CF01 | Termination of patent right due to non-payment of annual fee |