CN111916312B - Relay contact assembly capable of resisting large short circuit current - Google Patents
Relay contact assembly capable of resisting large short circuit current Download PDFInfo
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- CN111916312B CN111916312B CN202010804500.6A CN202010804500A CN111916312B CN 111916312 B CN111916312 B CN 111916312B CN 202010804500 A CN202010804500 A CN 202010804500A CN 111916312 B CN111916312 B CN 111916312B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/56—Contact spring sets
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/10—Electromagnetic or electrostatic shielding
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Abstract
The invention discloses a relay contact assembly resisting large short circuit current, which comprises a movable iron core, a fixed iron core, a main magnetic guide plate, a first spring seat, a movable contact spring, a reset spring, a primary contact spring, a secondary contact spring, a support rod, a contact head and a ceramic cap, wherein a first groove body with an upward opening is arranged at the upper end of the movable iron core, a threaded hole is formed in the bottom of a first fixing groove, the support rod is screwed on the threaded hole, the fixed iron core is arranged above the movable iron core, the main magnetic guide plate is fixed at the top of the fixed iron core, and a second groove body with a downward opening is arranged at the lower end of the fixed iron core. According to the invention, the secondary contact spring is arranged inside the primary contact spring, so that the relay has larger suction force compared with other relays under the condition of the same power or has smaller power compared with other relays under the condition of the same suction force, and the effectiveness of the relay is ensured.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of electric appliances, in particular to the technical field of relays.
[ background of the invention ]
A relay, also known as a relay, is an electronic control device having a control system, also known as an input loop, and a controlled system, also known as an output loop, which is commonly used in automatic control circuits, and which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like. The existing relay has the problems of lower contact pressure, poorer short-circuit current resistance and the like.
[ summary of the invention ]
The invention aims to solve the problems in the prior art and provides a relay contact assembly with large short-circuit current resistance, which enables a relay to obtain larger contact pressure under the condition of the same power from the change of a contact mechanism and improves the short-circuit current resistance of the relay.
In order to achieve the purpose, the invention provides a relay contact assembly resisting large short circuit current, which comprises a movable iron core, a fixed iron core, a main magnetic plate, a first spring seat, a movable contact, a reset spring, a primary contact spring, a secondary contact spring, a support rod, a contact head and a ceramic cap, wherein a first groove body with an upward opening is arranged at the upper end of the movable iron core, a threaded hole is arranged at the bottom of a first fixed groove, the support rod is screwed on the threaded hole, the fixed iron core is arranged above the movable iron core, the main magnetic plate is fixed at the top of the fixed iron core, a second groove body with a downward opening is arranged at the lower end of the fixed iron core, a third groove body with an upward opening is arranged at the upper end of the fixed cylinder iron core, the second groove body is communicated with the third groove body through a through hole, the support rod penetrates through the through hole and extends into the third groove body, and a limit block is fixed at the top end of the support rod, a limiting block is inserted into the third groove body, the reset spring is sleeved on a supporting rod, the reset spring is clamped between the bottom of the first groove body and the bottom of the second groove body, a first spring seat is fixed at the top of the limiting block and is positioned above the main magnetic guide plate, a first-stage contact spring and a second-stage contact spring which are coaxially arranged are fixed on the first spring seat, the second-stage contact spring is positioned inside the first-stage contact spring, the length of the second-stage contact spring is smaller than the height of the first-stage contact spring, a guide mechanism is arranged on the first spring seat or the supporting rod, a movable contact piece capable of moving up and down along the guide mechanism is installed on the guide mechanism and is positioned right above the first-stage contact spring, a ceramic cap is fixed on the main magnetic guide plate, two contact heads are fixed on the ceramic cap, and penetrate through the top wall of the ceramic cap, the contact is positioned above the movable contact piece.
Preferably, the fixed iron core is composed of a first core body and a second core body, the first core body is fixed at the upper end of the second core body, the cross section of the first core body is smaller than that of the second core body, and the main magnetic guide plate is sleeved on the first core body.
Preferably, the first groove body, the second groove body, the third groove body and the through hole are located on the same axis, the through hole is in clearance fit with the supporting rod, and the limiting block is in clearance fit with the third groove body.
Preferably, the guide mechanism comprises a connecting rod and a second spring seat, the connecting rod is fixed to the top of the limiting block, the connecting rod penetrates through the first spring seat, the second spring seat is fixed to the top of the connecting rod, the movable contact piece is sleeved outside the connecting rod, the first-stage contact spring is in contact with the movable contact piece when the movable contact piece is located at the top, the second-stage contact spring is not in contact with the movable contact piece, and the second-stage contact spring is in a compressed state when the movable contact piece is located at the bottom.
Preferably, the first spring seat is provided with an annular groove, the bottom end of the primary contact spring is fixed in the annular groove, and the secondary contact spring is sleeved outside the connecting rod and is positioned in an area surrounded by the annular groove.
Preferably, the second spring holder comprises fixed disk and a fixed cylinder, the fixed cylinder is fixed in the bottom of fixed disk, the upper end of the fixed disk is provided with a mounting groove, a cylinder hole in the fixed cylinder upwards penetrates through the fixed disk and is communicated with the mounting groove, the connecting rod penetrates through the cylinder hole and extends into the mounting groove, a ring clamping groove is arranged on the outer wall of the top of the connecting rod, a clamp spring is clamped on the clamping groove, a flat gasket is arranged between the clamp spring and the bottom of the mounting groove, the movable contact spring is movably sleeved outside the fixed cylinder, and the outer diameter of the fixed cylinder is smaller than the inner diameter of the secondary contact spring.
Preferably, the guide mechanism comprises a support plate, side plates, an upper magnetic conduction plate and a lower magnetic conduction plate, wherein a horizontally arranged through groove is formed in the first spring seat, the support plate penetrates through the through groove, two vertical side plates are arranged at two ends of the support plate respectively, a rectangular limiting groove is formed in each of the two side plates, limiting strips are arranged at two ends of the upper magnetic conduction plate and inserted into the limiting grooves, two sides of the lower magnetic conduction plate are bent upwards to form a strip groove, the bent side of the lower magnetic conduction plate is in contact with the side plates, the movable contact is installed in the strip groove formed by the lower magnetic conduction plate, the first-stage contact spring is in contact with the lower magnetic conduction plate when the movable contact is located at the top, the second-stage contact spring is not in contact with the lower magnetic conduction plate, and the second-stage contact spring is in a compressed state when the movable contact is located at the bottom.
Preferably, an auxiliary disc and an auxiliary ring which are coaxially arranged are fixed at the upper end of the first spring seat, the auxiliary disc is located in the auxiliary ring, the primary contact spring is sleeved outside the auxiliary ring, and the secondary contact spring is sleeved outside the auxiliary disc.
Preferably, the movable contact spring and the lower magnetic conduction plate are fixed in a riveting mode, an installation pouring angle used for installing the upper magnetic conduction plate is arranged at the top end of the side plate, and the length of the limiting groove in the vertical direction is larger than or equal to the length of the limiting strip in the vertical direction.
The invention has the beneficial effects that: according to the invention, the secondary contact spring is arranged inside the primary contact spring, so that the relay has larger suction force under the same power condition than other relays or has smaller power under the same suction force condition than other relays, and the effectiveness of the relay is ensured; the upper magnetic conduction plate and the lower magnetic conduction plate are matched, so that the relay can better resist a magnetic field generated when the movable contact piece conducts electricity.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a front view of an embodiment of a relay contact assembly of the present invention that is resistant to high short circuit currents;
FIG. 2 is a front view of a second embodiment of a relay contact assembly for resisting high short circuit currents in accordance with the present invention;
fig. 3 is a partial exploded view of a second embodiment of a relay contact assembly for resisting high short circuit currents in accordance with the present invention.
In the figure: 1-movable iron core, 2-fixed iron core, 3-support rod, 4-first spring seat, 5-ceramic cap, 6-movable contact, 10-threaded hole, 11-first groove body, 12-reset spring, 21-second groove body, 22-third groove body, 25-first core body, 26-second core body, 27-main magnetic plate, 30-limiting block, 40-through groove, 41-first-stage contact spring, 42-second-stage contact spring, 43-annular groove, 44-auxiliary disc, 45-auxiliary ring, 50-contact head, 60-clamping groove, 61-connecting rod, 62-second spring seat, 63-fixed disc, 64-fixed cylinder, 65-mounting groove, 66-clamping spring, 67-flat gasket, 70-support plate, 71-side plate, 72-upper magnetic conduction plate, 73-lower magnetic conduction plate, 74-limiting groove and 75-limiting strip.
[ detailed description ] embodiments
The first embodiment is as follows:
referring to fig. 1, the relay contact assembly resisting large short circuit current of the invention comprises a movable iron core 1, a fixed iron core 2, a main magnetic plate 27, a first spring seat 4, a movable contact 6, a return spring 12, a primary contact spring 41, a secondary contact spring 42, a support rod 3, a contact 50 and a ceramic cap 5, wherein the upper end of the movable iron core 1 is provided with a first groove body 11 with an upward opening, the bottom of the first fixed groove is provided with a threaded hole 10, the support rod 3 is screwed on the threaded hole 10, the upper part of the movable iron core 1 is provided with the fixed iron core 2, the top of the fixed iron core 2 is fixed with the main magnetic plate 27, the lower end of the fixed iron core 2 is provided with a second groove body 21 with a downward opening, the upper end of the iron core of a fixed cylinder 64 is provided with a third groove body 22 with an upward opening, the second groove body 21 is communicated with the third groove body 22 through a through hole, the supporting rod 3 penetrates through the through hole and extends into the third groove body 22, the top end of the supporting rod 3 is fixedly provided with a limiting block 30, the limiting block 30 is inserted on the third groove body 22, the reset spring 12 is sleeved on the supporting rod 3, the reset spring 12 is clamped between the bottom of the first groove body 11 and the bottom of the second groove body 21, the top of the limiting block 30 is fixedly provided with a first spring seat 4, the first spring seat 4 is positioned above the main magnetic guide plate 27, the first spring seat 4 is fixedly provided with a first-stage contact spring 41 and a second-stage contact spring 42 which are coaxially arranged, the second-stage contact spring 42 is positioned in the first-stage contact spring 41, the length of the second-stage contact spring 42 is smaller than the height of the first-stage contact spring 41, the first spring seat 4 or the supporting rod 3 is provided with a guide mechanism, the guide mechanism is provided with a movable contact 6 which can move up and down along the guide mechanism, and the movable contact 6 is positioned right above the first-stage contact spring 41, the ceramic cap 5 is fixed on the main magnetic plate 27, the two contact heads 50 are fixed on the ceramic cap 5, the contact heads 50 penetrate through the top wall of the ceramic cap 5, the contact heads 50 are positioned above the movable contact 6, the fixed iron core 2 consists of a first core body 25 and a second core body 26, the first core body 25 is fixed at the upper end of the second core body 26, the cross section of the first core body 25 is smaller than that of the second core body 26, the main magnetic plate 27 is sleeved on the first core body 25, the first groove body 11, the second groove body 21, the third groove body 22 and the through hole are positioned on the same axis, the through hole is in clearance fit with the supporting rod 3, the limiting block 30 and the third groove body 22 are in clearance fit, the guide mechanism consists of a connecting rod 61 and a second spring seat 62, the connecting rod 61 is fixed with the top of the limiting block 30, the connecting rod 61 penetrates through the first spring seat 4, the second spring seat 62 is fixed at the top of the connecting rod 61, the movable contact piece 6 is sleeved outside the connecting rod 61, when the movable contact piece 6 is positioned at the top, the first-stage contact spring 41 is in contact with the movable contact piece 6, the second-stage contact spring 42 is not in contact with the movable contact piece 6, when the movable contact piece 6 is positioned at the bottom, the second-stage contact spring 42 is in a compressed state, the first spring seat 4 is provided with an annular groove 43, the bottom end of the first-stage contact spring 41 is fixed in the annular groove 43, the second-stage contact spring 42 is sleeved outside the connecting rod 61 and positioned in an area surrounded by the annular groove 43, the second spring seat 62 is composed of a fixed disk 63 and a fixed cylinder 64, the fixed cylinder 64 is fixed at the bottom of the fixed disk 63, the upper end of the fixed disk 63 is provided with a mounting groove 65, a cylinder hole in the fixed cylinder 64 upwards penetrates through the fixed disk 63 and is communicated with the mounting groove 65, the connecting rod 61 penetrates through the cylinder hole and extends into the mounting groove 65, the outer wall of the top of the connecting rod 61 is provided with a ring clamping groove 60, a snap spring 66 is clamped on the clamping groove 60, a flat gasket 67 is arranged between the snap spring 66 and the bottom of the mounting groove 65, the movable contact spring 6 is movably sleeved outside the fixed cylinder 64, and the outer diameter of the fixed cylinder 64 is smaller than the inner diameter of the secondary contact spring 42.
The second embodiment:
referring to fig. 2 and 3, the difference between the first embodiment and the first embodiment is that the guide mechanism is composed of a support plate 70, side plates 71, an upper magnetic conductive plate 72, and a lower magnetic conductive plate 73, a horizontally disposed through slot 40 is disposed on the first spring seat 4, the support plate 70 passes through the through slot 40, two vertical side plates 71 are disposed at two ends of the support plate 70, a rectangular limiting slot 74 is disposed on each of the two side plates 71, a limiting strip 75 is disposed at two ends of the upper magnetic conductive plate 72, the limiting strip 75 is inserted into the limiting slot 74, two sides of the lower magnetic conductive plate 73 are bent upward to form a strip slot, the bent side of the lower magnetic conductive plate 73 is in contact with the side plate 71, the movable contact 6 is mounted in the strip slot formed by the lower magnetic conductive plate 73, when the movable contact 6 is located at the top, the first contact spring 41 is in contact with the lower magnetic conductive plate 73 and the second contact spring 42 is not in a compressed state, the upper end of the first spring seat 4 is fixed with an auxiliary disc 44 and an auxiliary ring 45, the auxiliary disc 44 is located in the auxiliary ring 45, the first contact is sleeved on the movable contact 6, the movable contact is mounted in a manner that the vertical direction of the auxiliary plate 71, and the movable contact is mounted in the vertical direction, and the auxiliary plate 71, the auxiliary plate, and the movable contact is mounted in the vertical direction, and the vertical direction, the vertical direction of the auxiliary plate 73, and the auxiliary plate 71, and the auxiliary plate 75.
The working process of the invention is as follows:
in the working process of the relay contact assembly resisting the large short circuit current, in an attraction state, the current passes through the movable contact piece 6, a magnetic field can be generated around the movable contact piece 6 and passes through the upper magnetic conduction plate 72 and the lower magnetic conduction plate 73, a working air gap is formed between the upper magnetic conduction plate 72 and the lower magnetic conduction plate 73, and attraction force is generated between the air gaps. This force facilitates reliable contact of the contacts against electromagnetic forces generated by high currents.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (1)
1. The utility model provides an anti big short-circuit current relay contact subassembly which characterized in that: comprises a movable iron core (1), a fixed iron core (2), a main magnetic plate (27), a first spring seat (4), a movable contact (6), a reset spring (12), a primary contact spring (41), a secondary contact spring (42), a support rod (3), a contact head (50) and a ceramic cap (5), wherein the upper end of the movable iron core (1) is provided with a first groove body (11) with an upward opening, the bottom of a first fixed groove is provided with a threaded hole (10), the support rod (3) is screwed on the threaded hole (10), the upper side of the movable iron core (1) is provided with the fixed iron core (2), the top of the fixed iron core (2) is fixed with the main magnetic plate (27), the lower end of the fixed iron core (2) is provided with a second groove body (21) with a downward opening, the upper end of a fixed cylinder (64) iron core is provided with a third groove body (22) with an upward opening, the second groove body (21) and the third groove body (22) are communicated through a through hole, the support rod (3) penetrates through the through hole to extend into the third groove body (22), the top end of the support rod (3) is fixed with a third groove body (30), the groove body (22), the stop block (30) is inserted between the second groove body (21) and the reset spring (12), the reset spring (12) and the reset spring (12) are sleeved on the first groove body (12), the magnetic switch is characterized in that a first spring seat (4) is fixed to the top of the limiting block (30), the first spring seat (4) is located above a main magnetic plate (27), a first-stage contact spring (41) and a second-stage contact spring (42) which are coaxially arranged are fixed on the first spring seat (4), the second-stage contact spring (42) is located inside the first-stage contact spring (41), the length of the second-stage contact spring (42) is smaller than the height of the first-stage contact spring (41), a guide mechanism is arranged on the first spring seat (4) or a supporting rod (3), a movable contact (6) capable of moving up and down along the guide mechanism is installed on the guide mechanism, the movable contact (6) is located right above the first-stage contact spring (41), a ceramic cap (5) is fixed on the main magnetic plate (27), two contact heads (50) are fixed on the ceramic cap (5), the contact heads (50) penetrate through the top wall of the ceramic cap (5), the movable contact heads (50) are located above the movable contact heads (6), the fixed iron core (2) is composed of a first body (25) and a second-stage magnetic body (26), the cross section of the first magnetic plate (25) is smaller than that of a core body (26), and the core body (26) is fixed on the first-stage magnetic plate (27), and the core body (26) is located on the second magnetic plate, the second groove body (21), the third groove body (22) and the through hole are located on the same axis, the through hole is in clearance fit with the support rod (3), the limiting block (30) and the third groove body (22) are in clearance fit, when the movable contact piece (6) is located at the top, the first-stage contact spring (41) is in contact with a part located right above the first-stage contact spring and the second-stage contact spring (42) is not in contact with a part located right above the second-stage contact spring, when the movable contact piece (6) is located at the bottom, the second-stage contact spring (42) is in a compressed state, the guide mechanism is composed of a support plate (70), a side plate (71), an upper magnetic conductive plate (72) and a lower magnetic conductive plate (73), a horizontal through groove (40) is formed in the first spring seat (4), the support plate (70) penetrates through the through groove (40), two ends of the support plate (70) are respectively provided with a vertical side plate (71) arranged up and down, a rectangular limiting groove (74) is formed in each side of the two side plates (71), two ends of the upper magnetic conductive plate (72) are provided with a limiting strip (75), the movable contact plate (73) is inserted into the upper magnetic conductive plate (73), and the lower contact plate (73), when the movable contact piece (6) is in the movable contact plate (73), the movable contact piece (6) is bent and the movable contact plate (73), the upper magnetic strip (73), the movable contact plate (73) is bent and the movable contact plate (73), the movable contact plate (6) is formed in the lower contact plate (73), and the movable contact plate (73), the movable contact plate (6) is bent side Spring (42) and lower magnetic conduction plate (73) contactless, second grade contact spring (42) are in compression state when movable contact (6) are located the below, first spring holder (4) upper end is fixed with auxiliary disc (44) and auxiliary ring (45) of coaxial setting, and auxiliary disc (44) are located auxiliary ring (45), and one-level contact spring (41) cover is outside at auxiliary ring (45), and second grade contact spring (42) cover is outside at auxiliary disc (44), movable contact (6) are fixed mutually through the riveted mode with lower magnetic conduction plate (73), and the top of curb plate (71) is equipped with the installation angle of falling that is used for installing magnetic conduction plate (72), and the ascending length in the vertical direction of spacing groove (74) is greater than or equal to the ascending length in the vertical direction of spacing strip (75).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804500.6A CN111916312B (en) | 2020-08-12 | 2020-08-12 | Relay contact assembly capable of resisting large short circuit current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010804500.6A CN111916312B (en) | 2020-08-12 | 2020-08-12 | Relay contact assembly capable of resisting large short circuit current |
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| Publication Number | Publication Date |
|---|---|
| CN111916312A CN111916312A (en) | 2020-11-10 |
| CN111916312B true CN111916312B (en) | 2023-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010804500.6A Active CN111916312B (en) | 2020-08-12 | 2020-08-12 | Relay contact assembly capable of resisting large short circuit current |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116246908A (en) * | 2021-12-07 | 2023-06-09 | 三友联众集团股份有限公司 | Relay |
| CN116264141A (en) * | 2021-12-13 | 2023-06-16 | 三友联众集团股份有限公司 | Short-circuit-resistant relay |
| CN216624126U (en) * | 2021-12-13 | 2022-05-27 | 三友联众集团股份有限公司 | Relay reliable in use |
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| WO2011161919A1 (en) * | 2010-06-21 | 2011-12-29 | Nissan Motor Co., Ltd. | Electromagnetic relay |
| CN111415839A (en) * | 2020-03-17 | 2020-07-14 | 中国航天时代电子有限公司 | High-voltage direct-current contactor |
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| KR200486560Y1 (en) * | 2014-01-27 | 2018-06-07 | 엘에스산전 주식회사 | Electromagnetic relay |
| CN205069499U (en) * | 2015-08-19 | 2016-03-02 | 上海瑞奇汽配有限公司 | Vaccum relay |
| CN106531563B (en) * | 2017-01-04 | 2019-04-02 | 昆山国力源通新能源科技有限公司 | Magnetic keeps energy-saving high-voltage direct-current contactor |
| CN208208666U (en) * | 2018-06-15 | 2018-12-07 | 浙江东亚电子有限公司 | A kind of busbar mounting means D.C. contactor with arc-control device |
| CN208970449U (en) * | 2018-09-17 | 2019-06-11 | 深圳市品川能源电气有限公司 | A kind of closed type higfh-tension ceramics seal DC contactor |
| CN109887779B (en) * | 2019-04-02 | 2024-04-09 | 浙江众信新能源科技股份有限公司 | Ceramic sealing auxiliary switch for direct current contactor |
| CN109872922B (en) * | 2019-04-02 | 2021-02-02 | 浙江众信新能源科技股份有限公司 | DC contactor with auxiliary switch |
| CN210142625U (en) * | 2019-08-08 | 2020-03-13 | 东莞市中汇瑞德电子股份有限公司 | Short circuit resisting structure of high-capacity relay |
| CN210607116U (en) * | 2019-09-24 | 2020-05-22 | 浙江正泰电器股份有限公司 | Contact system of direct current relay |
| CN210722900U (en) * | 2019-10-14 | 2020-06-09 | 昆山国力源通新能源科技有限公司 | Low-power consumption high-voltage direct current contactor |
| CN115332016A (en) * | 2019-12-31 | 2022-11-11 | 厦门宏发电力电器有限公司 | Direct current relay capable of resisting short-circuit current and extinguishing arc |
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|---|---|---|---|---|
| WO2011161919A1 (en) * | 2010-06-21 | 2011-12-29 | Nissan Motor Co., Ltd. | Electromagnetic relay |
| CN111415839A (en) * | 2020-03-17 | 2020-07-14 | 中国航天时代电子有限公司 | High-voltage direct-current contactor |
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| CN111916312A (en) | 2020-11-10 |
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