CN212750736U - Static contact component of small-volume high-voltage direct-current contactor and direct-current contactor - Google Patents

Abstract

The static contact component of the small-volume high-voltage direct-current contactor and the direct-current contactor comprise a static contact support (1), wherein a pair of static contacts (2, 2') are arranged on the static contact support (1), and the high-voltage direct-current contactor is characterized in that: at least one pair of permanent magnets I (3,3 ') is arranged on one side of the central connecting line of the pair of static contacts (2, 2'), a permanent magnet II (4) is arranged on the other side of the central connecting line of the pair of static contacts (2,2 '), and the polarities of the magnetic poles of the permanent magnets I (3, 3') and the permanent magnet II (4) are oppositely arranged. This direct current contactor utilizes the arrangement of permanent magnet position, realizes taking the function of auxiliary contact, and magnetism blows greatly, and arc extinguishing performance is good, reaches the high life requirement, and effectively reduces the product volume, practices thrift installation space.

Description

Static contact component of small-volume high-voltage direct-current contactor and direct-current contactor

Technical Field

The utility model belongs to the technical field of direct current contactor, specifically say so and relate to a little volume high voltage direct current contactor's quiet contact subassembly and this direct current contactor.

Background

Direct current contactor universal use fills fields such as electric pile in new energy automobile, and the electric current range is 50 ~ 300A or higher, and the electric current then is between 500 ~ 900V. With the rapid development of the industry, the rated voltage of the direct current contactor is required to be higher and higher in the market. Because the volume of the direct current contactor is determined by rated current and the contact is in a closed space, the most important factor influencing the service life of the direct current contactor is the switching-on voltage, the higher the voltage is, the higher the energy of the electric arc is, the more serious the ablation on the contact is, and the service life of the contactor is directly influenced. One of the methods of solving the arc ablation problem in the prior art is to adopt the magnetic quenching of a sealing mode, the larger the magnetic quenching force is, the faster the arc transfer is, the easier the arc voltage is, the condition that the arc is quenched is reached, and the arc is quenched more quickly, so that the better arc quenching effect is achieved, and the service life of the contactor is prolonged.

When the main contact of the sealed direct current contactor is connected or disconnected, the connection or disconnection of the auxiliary contact is required to be used for judging the state of the main contact, so that the safety of the product in actual use is improved. In the prior art, a product generally realizes main contact detection by using the linkage of a microswitch and a contactor. However, under the limitation of the volume of the dc contactor, the existing dc contactor cannot meet the requirements of having an auxiliary contact, having higher magnetic blowing force and long service life.

Chinese patent ZL201720337167.6 discloses an arc extinguishing chamber with a non-equal wall thickness for a direct current contactor, which comprises a chamber body, wherein a moving contact and two fixed contacts are arranged in the chamber body; the inner wall of the bin body is respectively provided with two permanent magnets and two heat dissipation metal grid pieces, the two permanent magnets are arranged on two sides of the movable contact and have the same direction with the movable contact, the polarities of two opposite surfaces of the two permanent magnets are opposite, the magnetic force lines between the two permanent magnets are perpendicular to the current direction between the movable contact and the static contact, the concentrated or possibly superposed electric arcs are dispersed, elongated and blown to the heat dissipation metal grid pieces, the electric arcs are divided into short arcs through the protruding tips of the heat dissipation metal grid pieces, and therefore the temperature of the electric arcs is rapidly reduced and extinguished. Magnet occupies bulky among this technical scheme, can't install auxiliary contact additional, and increases heat dissipation metal bars piece and increase product cost.

Chinese patent ZL201820394276.6 is a supplementary dc contactor of electrified micro-gap switch, and it includes the shell body, and the shielding shell dress is in the inner chamber of shell body, the fixed dress of base is in the inner chamber of shell body is located the top of shielding shell, its characterized in that: the micro switch is directly arranged on the base. The microswitch of the direct current contactor is directly assembled on the base, so that the welding procedure of a PCB and the microswitch is omitted, the assembly efficiency of products is improved, the air pollution of the PCB caused by high welding temperature is avoided, and meanwhile, circuit board parts and welding cost are saved. But the service life of the product of the patent is not obviously prolonged, and the occupied volume is still large.

SUMMERY OF THE UTILITY MODEL

The utility model aims at exactly to above-mentioned current direct current contactor occupy that the volume is great, the short-lived technical defect, provide a little volume high voltage direct current contactor's static contact subassembly and this direct current contactor, utilize arranging of permanent magnet position, realize taking the function of auxiliary contact, magnetic blow-out is big, and arc extinguishing performance is good, reaches the high life requirement, and effectively reduces the product volume, practices thrift installation space.

Technical scheme

In order to realize the technical purpose, the utility model provides a little volume high voltage direct current contactor's static contact subassembly, it includes the static contact support, and a pair of static contact is installed on the static contact support, its characterized in that: and at least one pair of first permanent magnets are arranged on one side of the central connecting line of the pair of fixed contacts, and a second permanent magnet is arranged on the other side of the central connecting line of the pair of fixed contacts, and the polarities of the magnetic poles of the first permanent magnets and the second permanent magnets are opposite.

Further, the first permanent magnet and the second permanent magnet are arranged in corresponding mounting grooves in the inner cavity of the static contact support.

Further, the magnetic poles of the first pair of permanent magnets and the magnetic poles of the second pair of permanent magnets form magnetic fields which are respectively perpendicular to the connecting line of the centers of the pair of static contacts.

Further, the polarity directions of the magnetic poles of the first pair of permanent magnets are the same.

Further, a microswitch is arranged in the inner cavity of the static contact bracket, and the microswitch is arranged between the first pair of permanent magnets and is arranged at the same side of the first pair of permanent magnets.

A direct current contactor is characterized in that: the magnetic sleeve is arranged in the cavity and positioned in the base, the moving contact component is inserted into a first inner cavity of the coil component and can move in the first inner cavity, the coil component is arranged in a second inner cavity of the magnetic sleeve, the support is arranged in the cavity and positioned above the base, a pair of static contacts in the static contact component penetrate through the support and extend out of the upper cover, and the static contact component is positioned above the moving contact component and is arranged in the magnetic sleeve.

Further, the direct current contactor is sealed by epoxy resin.

Advantageous effects

The utility model provides a little volume high voltage direct current contactor's static contact subassembly and this direct current contactor utilize arranging of permanent magnet position, realize taking the function of auxiliary contact, and magnetism blows greatly, and arc extinguishing performance is good, reaches the high life requirement, and effectively reduces the product volume, practices thrift installation space.

Drawings

Fig. 1 is a product diagram of a dc contactor according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural diagram of a dc contactor according to embodiment 1 of the present invention.

Fig. 3 is an exploded view of the dc contactor according to embodiment 1 of the present invention.

Fig. 4 is a schematic structural diagram of the fixed contact assembly in embodiment 1 of the present invention.

Fig. 5 is a bottom view of the fixed contact assembly according to embodiment 1 of the present invention.

Fig. 6 is a schematic view of the magnetic field in embodiment 1 of the present invention.

Fig. 7 is a schematic view of the magnetic field in embodiment 2 of the present invention.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clear and obvious, the following is a detailed description of the features and exemplary embodiments of the present invention. It is understood that the following description of the specific embodiments is merely illustrative of the invention, which can be implemented by those skilled in the art without some of these details. In the drawings and the following description, well-known techniques and structures are not described in detail in order to avoid unnecessarily obscuring the present invention. The following describes one embodiment of a small-sized high-voltage dc contactor according to the present invention with reference to the accompanying drawings.

Example 1

As shown in fig. 1,2 and 3, the present embodiment provides a small-volume high-voltage direct-current contactor, which includes the above-mentioned fixed contact assembly 12, an upper cover 6 covers an opening of a base 7 to form a closed cavity 701, a magnetic sleeve 8 is installed in the cavity 701 and located in the base 7, a movable contact assembly 9 is inserted into a first inner cavity 1001 of a coil assembly 10 and can move in the first inner cavity 1001, the coil assembly 10 is installed in a second inner cavity 801 of the magnetic sleeve 8, a bracket 11 is installed in the cavity 701 and located above the base 7, and the fixed contact assembly 12 is located above the movable contact assembly 9 and located in the magnetic sleeve 8. In this embodiment, the dc contactor is sealed with epoxy resin.

As shown in fig. 4 and 5, the static contact component includes a static contact bracket 1, a pair of static contacts 2 and 2 'are mounted on the static contact bracket 1, the pair of static contacts 2 and 2' extend out of the upper cover 6 through the bracket 11, at least a pair of permanent magnets one 3 and 3 'are mounted on one side of a central connecting line of the pair of static contacts 2 and 2', and a permanent magnet two 4 is mounted on the other side of the central connecting line of the pair of static contacts 2 and 2 ', in this embodiment, the polarities of the magnetic poles of the pair of permanent magnets one 3 and 3' and the magnetic pole polarity of the permanent magnet two 4 are arranged oppositely. The microswitch 5 is arranged in the inner cavity of the static contact support 1, and the microswitch 5 is arranged between the pair of permanent magnets I3 and 3 'and is arranged at the same side as the pair of permanent magnets I3 and 3'.

Specifically, the pair of first permanent magnets 3, 3' and the second permanent magnet 4 are installed in corresponding installation grooves in the inner cavity of the static contact support 1. The magnetic poles corresponding to the permanent magnets 3 and 3 'and the permanent magnets 4 form magnetic fields perpendicular to the central connecting line of the pair of static contacts 2 and 2'. In particular, the polarity directions of the poles of the pair of permanent magnets one 3, 3' are the same. In this embodiment, as shown in fig. 6, the magnetic poles of the pair of first permanent magnets 3 and 3' are N poles, and are opposite to the S poles of the second permanent magnet 4, and the permanent magnets are arranged to blow the arc into the arc extinguishing chambers on both sides of the contact extension line in a magnetic blowing manner, and meanwhile, the micro switch realizes a function with an auxiliary contact, so that the magnetic blowing force is large, the arc extinguishing performance is good, the requirement on long service life is met, the product volume is effectively reduced, and the installation space is saved.

Example 2

As shown in fig. 7, the magnetic poles of the pair of permanent magnets one 3, 3' are S poles, which are opposite to the N poles of the permanent magnets two 4, and other structures are the same as those of embodiment 1, and will not be further described in detail.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (7)

1. A static contact component of a small-volume high-voltage direct-current contactor comprises a static contact support (1), wherein a pair of static contacts (2, 2') are mounted on the static contact support (1), and the static contact component is characterized in that: at least one pair of permanent magnets I (3,3 ') is arranged on one side of the central connecting line of the pair of static contacts (2, 2'), a permanent magnet II (4) is arranged on the other side of the central connecting line of the pair of static contacts (2,2 '), and the polarities of the magnetic poles of the permanent magnets I (3, 3') and the permanent magnet II (4) are oppositely arranged.

2. The stationary contact assembly of a low volume high voltage direct current contactor as claimed in claim 1, wherein: the pair of permanent magnets I (3, 3') and the permanent magnet II (4) are arranged in corresponding mounting grooves in the inner cavity of the static contact support (1).

3. The stationary contact assembly of a low volume high voltage direct current contactor as claimed in claim 1, wherein: the magnetic poles corresponding to the pair of first permanent magnets (3,3 ') and the pair of second permanent magnets (4) form magnetic fields which are respectively perpendicular to the central connecting line of the pair of static contacts (2, 2').

4. The stationary contact assembly of a low volume high voltage direct current contactor as claimed in claim 1, wherein: the polarity directions of the magnetic poles of the pair of first permanent magnets (3, 3') are the same.

5. The stationary contact assembly of a low volume high voltage direct current contactor as claimed in claim 1, wherein: the microswitch (5) is arranged in the inner cavity of the static contact support (1), and the microswitch (5) is arranged between the pair of permanent magnets I (3,3 ') and is arranged at the same side of the pair of permanent magnets I (3, 3').

6. A direct current contactor is characterized in that: the fixed contact assembly comprises the fixed contact assembly as claimed in any one of claims 1 to 5, an upper cover (6) covers the opening of a base (7) to form a closed cavity (701), a magnetic sleeve (8) is arranged in the cavity (701) and is positioned in the base (7), a movable contact assembly (9) is inserted in a first inner cavity (1001) of a coil assembly (10) and can move in the first inner cavity (1001), the coil assembly (10) is arranged in a second inner cavity (801) of the magnetic sleeve (8), a bracket (11) is arranged in the cavity (701) and is positioned above the base (7), a pair of fixed contacts (2, 2') in the fixed contact assembly (12) penetrate through the bracket (11) and extend out of the upper cover (6), and the fixed contact assembly (12) is positioned above the movable contact assembly (9) and is positioned in the magnetic sleeve (8).

7. A dc contactor as claimed in claim 6, wherein: the direct current contactor is sealed by epoxy resin.

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