CN211479955U - High-voltage direct-current contactor - Google Patents
High-voltage direct-current contactor Download PDFInfo
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- CN211479955U CN211479955U CN202020347115.9U CN202020347115U CN211479955U CN 211479955 U CN211479955 U CN 211479955U CN 202020347115 U CN202020347115 U CN 202020347115U CN 211479955 U CN211479955 U CN 211479955U
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Abstract
The utility model provides a high voltage direct current contactor, including movable contact subassembly, stationary contact, the movable contact subassembly includes transfer line, fixed bolster and movable contact, and fixed bolster upper portion is provided with the spout that supplies the movable contact to slide from top to bottom and play limiting displacement, and electrical insulation and fixed connection are in the same place between the bottom of fixed bolster and the upper portion of transfer line, and the upper portion of fixed bolster sets up the position that the movable contact was injectd to the spacing portion of symmetrical arrangement set up a spring between the bottom of fixed bolster and the movable contact. The utility model discloses a symmetrical structure prescribes a limit to the position of movable contact, guarantees that movable contact and stationary contact are steady, and the contact bounce is little, is favorable to improving product electric life and mechanical life's ability, has improved contactor product property ability.
Description
Technical Field
The utility model belongs to the contactor field, concretely relates to contactor of control high voltage direct current load.
Background
A contactor is an electronic control device having an input loop and 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. The circuit plays the roles of automatic cut-off, safety protection, circuit conversion and the like.
The patent with the publication number of CN201282083Y discloses a high-voltage direct-current contactor, which is also a high-voltage direct-current relay, in particular to a vacuum relay, comprising a moving contact component, a fixed contact component, a pushing mechanism containing an iron core (equivalent to an armature), a ceramic cavity and an outer magnetic circuit part; the pushing mechanism comprises a pushing rod and an iron core (equivalent to an armature) which can make the pushing rod move under the action of the external magnetic circuit part; the moving contact assembly, the fixed contact and the pushing mechanism are completely sealed in a vacuum cavity formed by a ceramic cavity and are respectively arranged at the positions which are correspondingly matched with each other, the moving contact assembly and the iron core (equivalent to an armature) are respectively connected at two ends of the pushing rod (equivalent to a transmission rod), and a ceramic insulator for realizing good electrical insulation between the moving contact assembly and the pushing rod (equivalent to the transmission rod) and between the moving contact assembly and the iron core (equivalent to the armature) is connected at the joint of the moving contact assembly and the pushing rod in a sliding mode. The structure utilizes the good vacuum performance and the good electric insulation performance of the ceramic insulator part, so that the movable contact and the fixed contact can be kept in good electric insulation with a magnetic circuit system formed by parts such as a magnetic yoke plate, an iron core (equivalent to an armature) and the like of the relay under any on or off state, and the arc breaking capacity of the relay when switching a direct-current high-voltage load is ensured.
As shown in fig. 1, a first moving contact 1 of a contactor in the prior art is usually fixed on a transmission rod 3, and the transmission rod 3 drives the first moving contact 1 to move through electromagnetic attraction and spring restoring force, so as to realize attraction and disconnection of the first moving contact 1 and a fixed contact. The first movable contact 1 is usually fixed on the transmission rod 3 through an E-shaped clamp spring 2, although the operation is convenient, a gap exists in the structure of the E-shaped clamp spring 2, namely a single-arm fixing mode, so that the parallelism of the assembled first movable contact 1 is poor, when the movable contact is broken, the reverse acting force of the spring is completely concentrated on the E-shaped clamp spring 2, the E-shaped clamp spring 2 is not uniformly stressed, and therefore after the contact is repeatedly attracted and broken for many times, the E-shaped clamp spring 2 is deformed, the relative position of the first movable contact 1 of a product is changed, namely, the loosening or rotating phenomenon occurs, at the moment, the two ends of the first movable contact 1 are difficult to be ensured to be simultaneously contacted with corresponding static contacts, the contact rebound is large, and the electrical life and the mechanical life of the first movable contact 1 are reduced; even if the E-shaped clamp spring 2 falls off, the first movable contact 1 falls off, and the contactor fails.
Disclosure of Invention
For solving the technical problem, the utility model provides a high voltage direct current contactor, the contactor is provided with a fixed bolster, support upper portion is provided with the spout that supplies the movable contact to slide from top to bottom and play limiting displacement, the lower part of support and the upper portion electrical insulation mode fixed connection of transfer line, the position of movable contact is injectd through setting up spacing portion (can be the both arms structure, the structure of symmetrical arrangement promptly) in the upper portion of support, it is steady to guarantee movable contact and stationary contact, the contact rebound is little, be favorable to improving product electric life and mechanical life's ability, contactor product property ability has been improved.
The utility model discloses a following technical scheme can realize:
a high-voltage direct-current contactor comprises a movable contact component and a fixed contact, wherein the movable contact component comprises a transmission rod, a fixed support and a movable contact, a sliding groove for the movable contact to slide up and down and play a limiting role is formed in the upper portion of the fixed support, the bottom of the fixed support and the upper portion of the transmission rod are electrically insulated and fixedly connected together, limiting portions which are symmetrically arranged are arranged on the upper portion of the fixed support to limit the position of the movable contact, and a spring is arranged between the bottom of the fixed support and the movable contact.
Furthermore, the fixed support comprises two side walls and a bottom which are symmetrically arranged, the bottom is a bottom plate, the two side walls are oppositely connected to two sides of the bottom plate, the upper parts of the two side walls are respectively provided with a clamping hole which is the sliding groove, the upper edges of the two clamping holes are symmetrically arranged limiting parts, the bottom plate is fixedly connected to the upper end of the transmission rod, bosses are arranged on two sides of the movable contact, and the bosses are arranged in the clamping holes. Compared with the prior art, the movable contact adopts two arms to be fixed, namely a symmetrical structure, the parallelism of the assembled movable contact is increased, the two ends of the movable contact are in electric contact with the stationary contacts reliably and stably when the contactor product is attracted, the smooth movement and the no abnormity of the motion of the product are further ensured, the movable contact is in stable contact with the stationary contacts, the contact rebound is small, the electric service life and the mechanical service life of the product can be improved, and the performance of the contactor product using the movable contact component is improved.
Furthermore, the movable contact is provided with a circular truncated cone, the spring is a first spring arranged between the movable contact and the bottom plate, the upper end of the first spring is attached to the movable contact, the upper end of the first spring is sleeved on the outer ring of the circular truncated cone to limit the shaking of the first spring, the stability of the movable contact is improved, the lower end of the first spring is attached to the bottom plate, the lower end of the first spring is sleeved outside the upper end of the transmission rod, and the movable contact is guaranteed to be in stable pre-pressing contact with the upper edge of the clamping hole of the fixed support under the action of the elastic force of the first spring when the contactor is powered off, so that the stability of the pressure contact of the movable contact and the fixed contact when.
Further, in order to solve the insulation problem of fixed bolster and transfer line, a solution is: the movable contact assembly is also provided with an insulating plate and an insulating ring, a through hole is formed in the center of the insulating plate, the insulating ring is a circular ring, the transmission rod is a cylinder, a limiting round table protruding outwards is arranged at the position, close to the end face, of the upper portion of the transmission rod, the insulating plate and the insulating ring are sleeved at the upper end of the transmission rod, the insulating plate is attached to the upper end face of the limiting round table, a ring table is arranged on the inner ring of the insulating plate, a hole is formed in the center of the bottom plate, the hole is sleeved on the outer ring of the ring table, the insulating ring is attached to the upper end face of the ring table, the insulating plate and the insulating ring separate the transmission rod from the bottom plate to guarantee the insulation and voltage resistance between the transmission rod and the bottom plate, the lower end of the first spring is sleeved on the outer side of the insulating ring to limit the shaking of the first spring, the high-voltage load capacity of the product is realized. The height of the ring platform is equal to the thickness of the bottom plate, so that the good isolation effect of the bottom plate and the transmission rod is ensured, and the insulation and voltage resistance between the transmission rod and the bottom plate are further ensured. Another solution is: the height setting of ring platform is greater than the thickness of bottom plate, and the lower extreme of insulating ring is provided with the step hole, and the outer lane of ring platform is entangled to the step hole, forms the creepage path of extension between transfer line and the bottom plate, has increased creepage path distance, has further improved withstand voltage performance, has improved contactor product high voltage load capacity. Yet another solution is: the lower extreme of insulating ring is provided with the bulge loop, and the outer lane of ring platform is entangled to the inner circle of bulge loop, and the outer lane of bulge loop is entangled to the hole, forms the creepage path of extension between transfer line and the bottom plate, has increased creepage path distance, has further improved withstand voltage performance, has improved contactor product high voltage load capacity.
Furthermore, the diameter of the outer ring of the insulating ring is larger than that of the outer ring of the ring platform, so that the bottom plate is clamped between the insulating plate and the insulating ring.
Furthermore, a counter bore is formed in the upper end of the insulating ring, a welding ring is arranged in the counter bore, the welding ring is welded and fixed with the upper end of the transmission rod, the insulating plate and the insulating ring are fixed at the upper end of the transmission rod, a bottom plate clamped between the insulating plate and the insulating ring is fixed at the upper end of the transmission rod, the movable contact is fixed at the upper end of the transmission rod, and the movable contact moves along with the transmission rod.
Furthermore, the upper part of the side wall where the clamping hole is located is bent outwards, so that bosses on two sides of the movable contact can be conveniently inserted into the clamping hole.
Further, the contactor further comprises an iron core and a second spring, a through hole is formed in the center of the iron core, an annular groove matched with the limiting circular truncated cone is formed in the upper end of the through hole of the iron core, the transmission rod is inserted into and penetrates through the through hole of the iron core, the lower end of the transmission rod is fixedly connected with the armature, the second spring is arranged between the armature and the iron core, and a stationary contact is arranged above the moving contact.
The beneficial effects of the utility model reside in that:
compared with the prior art, the position of the movable contact is limited through the symmetrical structure, the bridge type contact is reliable and stable when the product is sucked, the smooth movement and the no abnormity of the product are further ensured, the movable contact is stably contacted with the fixed contact, the contact bounce is small, the electric service life and the mechanical service life of the product can be favorably improved, and the performance of the contactor product is improved. The spring is arranged between the movable contact and the bottom of the fixed support, and under the action of the elastic force of the spring, the movable contact is ensured to be in stable contact with the fixed support, so that the contact stability of the contact is ensured. The insulating plate and the insulating ring are arranged to isolate the transmission rod from the bottom plate, so that the insulation and voltage resistance between the transmission rod and the bottom plate are ensured, and the high-voltage load capacity of a contactor product is realized. The creepage path distance between the transmission rod and the bottom plate is increased by arranging the lengthened creepage path, the voltage resistance is further improved, and the high-voltage load capacity of the contactor product is further improved.
Drawings
Fig. 1 is a schematic structural view of a moving contact assembly of a contactor in the prior art;
fig. 2 is a schematic structural diagram of a movable contact assembly in a first embodiment of the present invention;
fig. 3 is a cross-sectional view of the moving contact assembly according to an embodiment of the present invention;
FIG. 4 is an enlarged view taken at I in FIG. 3;
fig. 5 is a schematic structural view of a fixing bracket according to a first embodiment of the present invention;
fig. 6 is a schematic structural diagram of a movable contact according to a first embodiment of the present invention;
fig. 7 is a schematic structural view of an insulating plate according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an insulating ring according to a first embodiment of the present invention;
fig. 9 is a sectional view of the moving contact assembly according to the second embodiment of the present invention;
fig. 10 is a schematic structural view of an insulating ring according to a second embodiment of the present invention;
fig. 11 is a cross-sectional view of the moving contact assembly in the third embodiment of the present invention;
fig. 12 is a schematic structural view of an insulating ring according to a third embodiment of the present invention;
fig. 13 is a schematic structural diagram of a contactor according to a fourth embodiment of the present invention.
In the figure: 1-a first movable contact, 2-E type snap spring, 3-transmission rod, 4-fixed support, 5-movable contact, 6-a first spring, 7-insulating plate, 8-insulating ring, 9-welding ring, 10-iron core, 11-a second spring, 12-armature,
301-a limit round table,
401-side wall, 402-bottom plate, 403-snap hole, 404-hole,
501-a lug boss, 502-a circular truncated cone,
701-a ring platform, wherein the ring platform,
801-counter bore, 802-step bore, 803-convex ring.
Detailed Description
The preferred embodiments of the present invention will be further described with reference to the accompanying drawings, but the scope of the claimed invention is not limited thereto.
Example one
As shown in fig. 2 to 8, a movable contact assembly includes a driving lever 3, a fixed bracket 4 and a movable contact 5, the fixed bracket 4 includes two side walls 401 and a bottom plate 402, the two side walls 401 are oppositely connected to two sides of the bottom plate 402, a latching hole 403 is formed at an upper portion of the side walls 401, the bottom plate 402 is fixedly connected to an upper end of the driving lever 3, bosses 501 are formed at two sides of the movable contact 5, and the bosses 501 are inserted into the latching hole 403. The movable contact 5 adopts two arms to fix, namely the positions are limited in a bilateral symmetry mode, the parallelism of the assembled movable contact 5 is increased, the bridge type contact is reliable and stable when the product is attracted, the smooth movement and the no abnormity of the action of the product are further ensured, the movable contact 5 is in stable contact with the static contact, the contact rebound is small, the electric service life and the mechanical service life of the product can be improved, and the product performance is improved.
The movable contact 5 is provided with a circular truncated cone 502, a first spring 6 is arranged between the movable contact 5 and the bottom plate 402, the upper end of the first spring 6 is attached to the movable contact 5, the upper end of the first spring 6 is sleeved on the outer ring of the circular truncated cone 502 to limit the shaking of the first spring 6 and improve the stability of the movable contact 5, the lower end of the first spring 6 is attached to the bottom plate 402, the lower end of the first spring 6 is sleeved outside the upper end of the transmission rod 3, and under the action of spring force, the movable contact 5 is guaranteed to be in stable contact with the fixed support 4, and further the contact stability is guaranteed.
The assembly further comprises an insulating plate 7 and an insulating ring 8, a through hole is formed in the center of the insulating plate 7, the insulating ring 8 is in a circular ring structure, the transmission rod 3 is a cylinder, a limiting circular truncated cone 301 protruding outwards is arranged at the position, close to the end face, of the upper portion of the transmission rod 3, the insulating plate 7 and the insulating ring 8 are sleeved at the upper end of the transmission rod 3, the insulating plate 7 is attached to the upper end face of the limiting circular truncated cone 301, a circular table 701 is arranged on the inner ring of the insulating plate 7, a hole 404 is formed in the center of the bottom plate 402, the hole 404 sleeves the outer ring of the circular table 701, the insulating ring 8 is attached to the upper end face of the circular table 701, the insulating plate 7 and the insulating ring 8 separate the transmission rod 3 from the bottom plate 402 to ensure the insulating and voltage-resisting performances between the transmission rod 3 and the bottom plate 402, the lower end of the first spring 6 is sleeved on the outer side of the insulating, the insulation and voltage resistance between the first spring 6 and the transmission rod 3 are ensured, and the high-voltage load capacity of the product is realized.
The height of the ring platform 701 is equal to the thickness of the bottom plate 402, so that a good isolation effect between the bottom plate 402 and the transmission rod 3 is ensured, and further, the insulation and voltage resistance between the transmission rod 3 and the bottom plate 402 are ensured.
The diameter of the outer ring of the insulating ring 8 is larger than that of the outer ring of the ring stand 701, so that the bottom plate 402 is clamped between the insulating plate 7 and the insulating ring 8.
The upper end of the insulating ring 8 is provided with a counter bore 801, a welding ring 9 is arranged in the counter bore, the welding ring 9 is welded and fixed with the upper end of the transmission rod 3, so that the insulating plate 7 and the insulating ring 8 are fixed at the upper end of the transmission rod 3, the bottom plate 402 clamped between the insulating plate 7 and the insulating ring 8 is fixed at the upper end of the transmission rod 3, the movable contact 5 is further fixed at the upper end of the transmission rod 3, and the movable contact 5 moves along with the transmission rod 3.
The upper portion of the sidewall 401 where the latch hole 403 is located is bent outward, so that the bosses 501 at both sides of the moving contact 5 are conveniently inserted into the latch hole 403.
Example two
As shown in fig. 9 and 10, in addition to the structure of the first embodiment, the structure of the insulating ring 8 is modified as follows:
the lower extreme of insulating ring 8 is provided with step hole 802, and step hole 802 entangles the outer lane of ring platform 701, the height of ring platform 701 is greater than the thickness of bottom plate 402, forms the creepage route of extension between transfer line 3 and the bottom plate 402, has increased creepage route distance, has further improved voltage resistance, has improved product high voltage load capacity.
EXAMPLE III
As shown in fig. 11 and 12, in addition to the structure of the first embodiment, the structure of the insulating ring 8 is modified as follows:
the lower end of the insulating ring 8 is provided with a convex ring 803, the inner ring of the convex ring 803 sleeves the outer ring of the ring platform 701, the hole 404 sleeves the outer ring of the convex ring 803, and an extended creepage path is formed between the transmission rod 3 and the bottom plate 402, so that the creepage path distance is increased, the voltage resistance is further improved, and the high-voltage load capacity of the product is improved.
Example four
As shown in fig. 13, the present invention further provides a contactor including the moving contact assembly according to any one of the first to third embodiments, further including an iron core 10, a second spring 11 and an armature 12, a through hole is formed in the center of the iron core 10, an annular groove matched with the limiting circular truncated cone 301 is formed in the upper end of the through hole of the iron core 10, the transmission rod 3 is inserted into and penetrates through the through hole of the iron core 10, the lower end of the transmission rod 3 is fixedly connected with the armature 12, the second spring 11 is arranged between the armature 12 and the iron core 10, a stationary contact is arranged above the moving contact 5, when the product coil is not powered, the limiting circular truncated cone 301 is attached to the bottom of the annular groove of the iron core 10 under the elastic force of the second spring, and the moving contact 5; when the coil of the contactor is electrified, under the action of the magnetic force of the coil, the armature 12 moves towards the iron core 10 to drive the movable contact 5 to move upwards and make the movable contact 5 contact with the static contact, so that the attraction process is completed; when the coil of the contactor is de-energized, the magnetic force of the coil disappears, and the movable contact 5 is disconnected from the fixed contact under the action of the elastic force of the second spring 11, and the disconnection state is recovered.
The utility model provides a pair of movable contact subassembly, through the fixed movable contact of both arms structure, guarantee that the bridge type contact is reliable, stable when the actuation of product, and then guaranteed that the product motion is smooth and easy, the action does not have unusually to movable contact and stationary contact are steady, and the contact bounce is little, are favorable to improving product electric life and mechanical life's ability, have improved and have produced property ability. The spring is arranged between the movable contact and the fixed support, and under the action of the elastic force of the spring, the movable contact is ensured to be stably contacted with the fixed support, so that the contact stability of the contact is ensured. The insulating plate and the insulating ring are arranged to isolate the transmission rod from the bottom plate, so that the insulation and voltage resistance between the transmission rod and the bottom plate are ensured, and the high-voltage load capacity of a product is realized. The improved high-voltage load-resisting device has the advantages that the extended creepage path is arranged, the creepage path distance between the transmission rod and the bottom plate is increased, the voltage-resisting performance is further improved, and the high-voltage load capacity of the product is further improved.
Claims (11)
1. The high-voltage direct-current contactor comprises a movable contact component and a fixed contact, and is characterized in that: the movable contact assembly comprises a transmission rod, a fixed support and a movable contact, a sliding groove for the movable contact to slide up and down and play a limiting role is arranged on the upper portion of the fixed support, the bottom of the fixed support and the upper portion of the transmission rod are electrically insulated and fixedly connected together, limiting portions which are symmetrically arranged are arranged on the upper portion of the fixed support to limit the position of the movable contact, and a spring is arranged between the bottom of the fixed support and the movable contact.
2. The contactor as claimed in claim 1, wherein: the fixed support comprises two side walls and a bottom, the side walls and the bottom are symmetrically arranged, the bottom is a bottom plate, the two side walls are oppositely connected to two sides of the bottom plate, the upper portions of the two side walls are respectively provided with a clamping hole which is the sliding groove, the upper edges of the two clamping holes are symmetrically arranged limiting portions, the bottom plate is fixedly connected to the upper end of the transmission rod, bosses are arranged on two sides of the movable contact, and the bosses are installed in the clamping holes.
3. The contactor as claimed in claim 2, wherein: the movable contact is provided with a round table, the spring is a first spring arranged between the movable contact and the bottom plate, the upper end of the first spring is attached to the movable contact, the upper end of the first spring is sleeved on the outer ring of the round table, the lower end of the first spring is attached to the bottom plate, and the lower end of the first spring is sleeved outside the upper end of the transmission rod.
4. The contactor as claimed in claim 3, wherein: the movable contact assembly is further provided with an insulating plate and an insulating ring, a through hole is formed in the center of the insulating plate, the insulating ring is in a circular ring structure, the transmission rod is a cylinder, a limiting round table protruding outwards is arranged at the position, close to the end face, of the upper portion of the transmission rod, the insulating plate and the insulating ring are sleeved on the upper end of the transmission rod, the insulating plate is attached to the upper end face of the limiting round table, a ring table is arranged on the inner ring of the insulating plate, a hole is formed in the center of the bottom plate, the hole is sleeved on the outer ring of the ring table, the insulating ring is attached to the.
5. The contactor as claimed in claim 4, wherein: the height of the ring platform is equal to the thickness of the bottom plate.
6. The contactor as claimed in claim 4, wherein: the height setting of ring platform is greater than the thickness of bottom plate, and the lower extreme of insulating ring is provided with the step hole, and the outer lane of ring platform is entangled to the step hole.
7. The contactor as claimed in claim 4, wherein: the lower end of the insulating ring is provided with a convex ring, the inner ring of the convex ring is sleeved on the outer ring of the ring platform, and the hole is sleeved on the outer ring of the convex ring.
8. A contactor according to any one of claims 4, 6 and 7, wherein: the diameter of the outer ring of the insulating ring is larger than that of the outer ring of the ring platform.
9. The contactor as claimed in claim 8, wherein: the upper end of the insulating ring is provided with a counter bore, a welding ring is arranged in the counter bore, and the welding ring is welded and fixed with the upper end of the transmission rod.
10. The contactor as claimed in claim 2, wherein: the upper part of the side wall where the buckling hole is located is bent outwards.
11. The contactor as claimed in claim 4, wherein: the contactor, still include iron core, second spring and armature, the through-hole has been seted up at the iron core center, the through-hole upper end of iron core is provided with the annular that matches with spacing round platform, the transfer line inserts and passes the through-hole of iron core, transfer line lower extreme fixed connection armature sets up between armature and the iron core the second spring, the top of moving contact is provided with the stationary contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020347115.9U CN211479955U (en) | 2020-03-19 | 2020-03-19 | High-voltage direct-current contactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020347115.9U CN211479955U (en) | 2020-03-19 | 2020-03-19 | High-voltage direct-current contactor |
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| CN211479955U true CN211479955U (en) | 2020-09-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111243906A (en) * | 2020-03-19 | 2020-06-05 | 贵州航天电器股份有限公司 | High-voltage direct-current contactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111243906A (en) * | 2020-03-19 | 2020-06-05 | 贵州航天电器股份有限公司 | High-voltage direct-current contactor |
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