CN219017538U

CN219017538U - Anti-mechanical-impact direct-current contactor

Info

Publication number: CN219017538U
Application number: CN202223334192.9U
Authority: CN
Inventors: 覃奀垚; 顾春朋; 李康
Original assignee: Kunshan Guoli Yuantong New Energy Technology Co ltd
Current assignee: Kunshan Guoli Yuantong New Energy Technology Co ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-12
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a direct current contactor resistant to mechanical impact, which comprises: the device comprises a pair of fixed contacts, a movable reed and a pushing assembly for driving the movable reed to contact with or separate from the two fixed contacts during the action, wherein at least one side of the pushing assembly is provided with an impact-resistant mechanism, the impact-resistant mechanism comprises a first stop piece elastically propped by an elastic part and a second stop piece matched with the first stop piece for use, and the second stop piece is arranged on the pushing assembly; the first stop piece and the second stop piece are close to one another and are arranged vertically opposite to one another, and when the pushing component acts, the second stop piece can be driven to push the first stop piece to displace, so that the second stop piece can pass through the first stop piece. The utility model can realize excellent mechanical impact resistance effect through a simple mechanical structure, does not increase the power consumption of the contactor, and meets the energy-saving requirement.

Description

Anti-mechanical-impact direct-current contactor

Technical Field

The utility model relates to the technical field of contactors, in particular to a direct current contactor resistant to mechanical impact.

Background

The contactor is an electromagnetic switch for controlling the on-off of large current through the on-off of small current, and is widely applied to the new energy fields of electric automobiles, charging piles, photovoltaics, energy storage and the like. The existing double-breakpoint solenoid type direct current contactor has the following defects in the using process: when the contactor is in an off state and a short-time intense mechanical impact occurs, the movable reed can overcome the counterforce of the spring to move to contact with the fixed contact, and the instant communication condition occurs, so that the application of the client system is adversely affected.

Currently, in order to overcome this drawback, the conventional solution is to increase the spring reaction force to prevent the contact from being instantaneously opened. However, the increase of the elastic force value of the spring tends to cause the increase of the power consumption of the coil, and the energy-saving requirement cannot be met; in addition, the spring force value can be increased to a limited extent, and the limit impact resistance requirement cannot be met.

Disclosure of Invention

In order to solve the technical problem, the utility model provides the direct current contactor resistant to mechanical impact, and the impact-resistant mechanism is arranged in the contactor, so that the movable reed and the fixed contact cannot be closed by the impact-resistant mechanism in the process that an inertial force generated when a pushing component in the contactor is subjected to mechanical impact pushes upwards.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a mechanical shock resistant dc contactor comprising: the device comprises a pair of fixed contacts, a movable reed and a pushing assembly for driving the movable reed to contact with or separate from the two fixed contacts during the action, wherein at least one side of the pushing assembly is provided with an impact-resistant mechanism, the impact-resistant mechanism comprises a first stop piece elastically propped by an elastic part and a second stop piece matched with the first stop piece for use, and the second stop piece is arranged on the pushing assembly and moves synchronously along with the pushing assembly; the first stop piece and the second stop piece are close to one another and are arranged vertically opposite to one another, and when the pushing component acts, the second stop piece can be driven to push the first stop piece to displace, so that the second stop piece can pass through the first stop piece.

As a further improvement of the utility model, the impact-resistant mechanism further comprises a fixed bracket, wherein the first stop piece is arranged in the fixed bracket and can slide in the fixed bracket along the direction towards or away from the second stop piece.

As a further improvement of the utility model, a through hole is formed on one side of the fixed bracket facing the pushing component, and one end of the first stop piece passes through the through hole and extends to the upper part of the corresponding end of the second stop piece; the other end of the first stop piece surrounds the periphery and is provided with a stop table, and the stop table is stopped on the inner side wall of the fixed support.

As a further improvement of the utility model, the main body part of the first stop piece positioned in the through hole is square and is matched with the size of the through hole; the baffle is matched with the inner cavity of the fixed support in size.

As a further development of the utility model, the elastic element is built into the fixing bracket, and the elastic force exerted on the first stop element causes the first stop element to always have a tendency to move in the direction of the second stop element.

As a further improvement of the utility model, one end of the first stop piece, which is close to the second stop piece, is provided with a first conical head part, and the upper side and the lower side of the first conical head part are respectively provided with a first inclined blocking surface;

or one end of the first stop piece, which is close to the second stop piece, is arranged as a first ball part.

As a further improvement of the utility model, one end of the second stop piece, which is close to the first stop piece, is provided with a second conical head part, and the upper side and the lower side of the second conical head part are respectively provided with a second inclined blocking surface;

or one end of the second stop piece, which is close to the first stop piece, is provided as a second ball part.

As a further improvement of the utility model, the pushing component comprises an insulating base, a frame body support and a spring, wherein the lower part of the frame body support is integrally injection-molded in the insulating base, the movable reed transversely passes through the frame body support, and two ends of the spring are elastically propped between the movable reed and the insulating base.

As a further improvement of the utility model, the other end of the second stop piece is fixedly connected with the insulating base by any one of integral injection molding, riveting, clamping or fastening.

As a further improvement of the utility model, the impact-resistant mechanism is provided with two groups which are respectively arranged at two opposite sides of the pushing component.

The beneficial effects of the utility model are as follows: the utility model provides a mechanical impact resistant direct current contactor, which is characterized in that a movable first stop piece which is elastically abutted by an elastic part is arranged on the outer side of a pushing component, and a second stop piece which is matched with the movable first stop piece is fixed on the pushing component, so that when the contactor is subjected to mechanical impact, a movable reed and a fixed contact cannot be closed by virtue of the blocking effect of the first stop piece on the second stop piece, an excellent mechanical impact resistant effect can be realized through a simple mechanical structure, the power consumption of the contactor is not increased, the energy saving requirement of the market is met, and the mechanical impact resistant direct current contactor has a good application prospect.

Drawings

FIG. 1 is a front view of a first embodiment of a mechanical shock resistant DC contactor of the present utility model;

FIG. 2 is a cross-sectional view of a first embodiment of a mechanical shock resistant DC contactor of the present utility model;

FIG. 3 is a perspective view of a second stop and an insulating base of a first embodiment of a DC contactor resistant to mechanical shock according to the present utility model;

FIG. 4 is an exploded view of an elastic member, a first stopper and a fixing bracket of a DC contactor with mechanical shock resistance according to an embodiment of the present utility model;

FIG. 5 is a front view of an embodiment of a mechanical shock resistant DC contactor of the present utility model in an engaged state;

fig. 6 is a cross-sectional view of a second embodiment of the mechanical shock resistant dc contactor of the present utility model.

The following description is made with reference to the accompanying drawings:

1. a stationary contact; 2. a movable reed; 3. an elastic member; 4. a first stopper;

401. a baffle; 402. a first tapered head; 403. a first bulb portion; 5. a second stopper; 501. a second tapered head; 502. a second bulb portion; 6. a fixed bracket; 601. a through hole; 7. an insulating base; 8. a frame support; 9. a spring; 10. a magnetic pole plate.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

The terminology used in the present utility model is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present utility model. As used in the specification and claims of the present utility model, the singular forms "a," "an," or "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that words such as "first," "second," and the like, used in the description and in the claims of the present utility model, do not denote any order, quantity, or importance, but rather are names used to distinguish one feature from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, the terms "front", "rear", "upper", "lower", "horizontal", "vertical", and the like are used herein for convenience of description and are not limited to a particular location or to a particular spatial orientation. The word "comprising" or "comprises", and the like, is an open-ended expression, meaning that elements appearing before "comprising" or "including", encompass the elements appearing after "comprising" or "including", and equivalents thereof, and not exclude that elements appearing before "comprising" or "including", may also include other elements. In the present utility model, if a plurality of the above-mentioned components are present, the meaning of the above-mentioned components is two or more.

Example 1

Referring to fig. 1 to 5, the present utility model provides a mechanical shock resistant dc contactor, comprising: a pair of fixed contacts 1, a movable reed 2, a pushing component, an impact-resistant mechanism, an electromagnetic driving mechanism and a magnetic plate 10. The two fixed contacts 1 are fixed on the ceramic shell of the contactor side by side, and the lower ends of the fixed contacts extend into the inner cavity of the ceramic shell. The movable reed 2, the pushing component, the impact-resistant mechanism, the electromagnetic driving mechanism and the magnetic plate 10 are all accommodated in the inner cavity of the ceramic shell.

Wherein, electromagnetic drive mechanism is in the below of magnetic pole plate 10, and electromagnetic drive mechanism does not regard as the focus of this application improvement, can adopt prior art conventional technique, and it mainly includes coil winding, movable core and reset spring, realizes driving movable core up-and-down motion through the switching on and off of control coil winding.

The movable reed 2 and the pushing component are positioned above the magnetic plate 10, the pushing component is connected with the electromagnetic driving mechanism and is driven by the electromagnetic driving mechanism to reciprocate up and down, and the pushing component can drive the movable reed 2 to contact or separate from the two fixed contacts 1 during the action. The pushing assembly comprises an insulating base 7, a frame support 8 and a spring 9, wherein the lower part of the frame support 8 is integrally injection molded in the insulating base 7, the movable reed 2 transversely passes through the frame support 8 and is positioned right below the two fixed contacts 1, and two ends of the spring 9 are elastically propped between the movable reed 2 and the insulating base 7.

Referring to fig. 1 and 2, at least one side of the pushing assembly is provided with an impact-resistant mechanism, and the impact-resistant mechanism comprises a first stop member 4 elastically abutted by an elastic member 3, a second stop member 5 matched with the first stop member 4 for use, and a fixed bracket 6. The fixing bracket 6 is fixed on the magnetic pole plate 10, and can be fixed by riveting, welding, bolts and the like. The first stopper 4 is placed in the fixed bracket 6, and the first stopper 4 is slidable in the fixed bracket 6 in a horizontal direction toward or away from the second stopper 5. The second stop piece 5 is arranged on the pushing component and moves synchronously along with the pushing component, the first stop piece 4 and the second stop piece 5 are arranged transversely and parallel to each other, and one ends, close to each other, of the first stop piece 4 and the second stop piece 5 are arranged vertically opposite to each other. The elastic element 3 is built into the fixed bracket 6, and the elastic force exerted on the first stop 4 is such that the first stop 4 always has a tendency to move towards the second stop 5.

When the contactor is in an open state, in the process of upward pushing by the inertial force generated when the pushing component is subjected to mechanical impact, the second stop piece 5 is driven to move upward and lean against the first stop piece 4, and the second stop piece 5 is subjected to the resistance action of the first stop piece 4 to prevent the pushing component and the movable reed from further moving upward, so that the movable reed and the static contact cannot be closed. And in this process, when the first stopper 4 is pushed by the second stopper 5 to retreat, the elastic member 3 is compressed to increase the resistance to the second stopper 5, achieving a more excellent mechanical shock resistance effect.

When the electromagnetic driving mechanism drives the pushing component to move upwards, after the coil winding is electrified, the movable iron core polarizes and moves upwards under the action of electromagnetic attraction force, and the electromagnetic attraction force received by the pushing component is increased suddenly along with the reduction of the air gap, so that the generated larger electromagnetic attraction force is enough to overcome the elastic force of the elastic component 3 to the first stop piece 4 (or the resistance of the first stop piece 4 to the second stop piece 5), and the pushing component drives the second stop piece 5 to push the first stop piece 4 to move backwards, so that the second stop piece 5 upwards passes through the first stop piece 4, and the movable reed 2 and the two fixed contacts 1 are closed. Similarly, after the coil winding is powered off, the movable iron core drives the pushing component to move downwards under the action of the elastic force of the reset spring, and the elastic force of the reset spring is enough to overcome the resistance of the first stop piece 4 to the second stop piece 5, so that the first stop piece 4 is pushed to move backwards, the second stop piece 5 is enabled to pass through the first stop piece 4 downwards, and the movable reed 2 is reset. Therefore, the anti-mechanical impact is realized through adopting the mechanical structure, the power consumption of the original contactor is not increased, and the energy-saving requirement of the market is met.

In this embodiment, the elastic member 3 is a spiral spring, and of course, the elastic member may be another elastic member with elastic deformation capability, and it should be noted that in practical application, the elastic force of the elastic member 3 needs to be reasonably configured, so that the elastic force can be overcome by the electromagnetic attraction force of the electromagnetic driving mechanism and the elastic force of the return spring while the elastic member has a better resistance to the second stop member 5.

Referring to fig. 4, in the present embodiment, the fixing bracket 6 is, but not limited to, a rectangular parallelepiped, and has a square cavity inside, and a through hole 601 is formed on a side facing the pushing component. The first stop 4 is located in the cavity of the fixed bracket 6, and one end of the first stop extends to the upper side of the corresponding end of the second stop 5 through the through hole 601.

Wherein, the other end that first backstop piece 4 is located the cavity is provided with the fender platform 401 around the periphery, and the one end elasticity of elastomeric element 3 is supported on fender platform 401, and the other end elasticity of elastomeric element 3 is supported on one inside wall of fixed bolster 6 for keep off the platform 401 backstop on another relative inside wall of fixed bolster 6, prevent that first backstop piece 4 from deviating from in the fixed bolster 6. The main body part of the first stop piece 4 in the through hole 601 is square and is matched with the size of the through hole 601, and meanwhile, the baffle 401 is matched with the size of the inner cavity of the fixed support 6, so that the moving stability of the first stop piece 4 in the fixed support 6 can be ensured.

The assembly of the elastic member 3, the first stopper 4, and the fixing bracket 6 is not limited to the following manner: the side of the fixed support 6 opposite to the through hole 601 is provided with an opening, when the fixed support is assembled, the first stop piece 4 is firstly placed into the fixed support 6 from the opening, one end of the first stop piece is penetrated out of the through hole 601, then the elastic component 3 is arranged, and finally a side plate is welded at the opening of the fixed support 6, so that the assembly is realized.

In order to realize that the second stop piece 5 can push the first stop piece 4 to retreat in the power-on and power-off process of the contactor, one end of the first stop piece 4, which is close to the second stop piece 5, is provided with a first conical head part 402, and the upper side and the lower side of the first conical head part 402 are respectively provided with a first inclined stop surface; meanwhile, one end of the second stopper 5, which is close to the first stopper 4, is provided as a second tapered head 501, and both upper and lower sides of the second tapered head 501 have second inclined blocking surfaces. Wherein the first inclined blocking surface has a consistent inclination with a corresponding second inclined blocking surface, and at least part of a first inclined blocking surface positioned at the lower side of the first conical head 402 is opposite to at least part of a second inclined blocking surface positioned at the upper side of the second conical head 501. Under the drive of an electromagnetic driving mechanism or a reset spring, the second stop piece 5 is matched with a corresponding first inclined stop surface for use by virtue of the second inclined stop surface in the up-and-down movement process, so that the first stop piece 4 is pushed to retreat for avoiding.

Referring to fig. 3, in the present embodiment, the other end of the second stopper 5 is integrally molded in the insulating base 7. The first stop piece 4 and the second stop piece 5 are made of materials which are not easy to wear and have high strength, and attention needs to be paid to ensuring that the second stop piece 5 is not contacted with the frame body support 8 when the metal materials are selected, so that the high-low voltage end is electrically isolated. In addition, the other end of the second stop member 5 may be connected to the insulating base 7 by fastening, riveting or bolting.

Preferably, in this embodiment, the impact-resistant mechanism is provided with two groups, which are respectively disposed on two opposite sides of the pushing component, so as to realize more stable mechanical impact resistance.

Example two

Referring to fig. 6, the difference between the present embodiment and the first embodiment is that: one end of the first stopper 4 close to the second stopper 5 is provided as a first ball part 403, one end of the second stopper 5 close to the first stopper 4 is provided as a second ball part 502, and the first ball part 403 is at least partially above the second ball part 502. Under the drive of an electromagnetic driving mechanism or a reset spring, the second stop piece 5 is in contact fit with the cambered surface of the first spherical head part 403 by virtue of the second spherical head part 502 in the up-and-down movement process, and the first stop piece 4 can be pushed to move backwards.

In the above description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The foregoing description is only of a preferred embodiment of the utility model, which can be practiced in many other ways than as described herein, so that the utility model is not limited to the specific implementations disclosed above. While the foregoing disclosure has been described with reference to certain embodiments, it will be understood by those skilled in the art that various changes and modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model without departing from the technical solution of the present utility model still falls within the scope of the technical solution of the present utility model.

Claims

1. The utility model provides an anti mechanical shock direct current contactor, includes a pair of static contact (1), movable reed (2) and when acting in order to drive movable reed (2) with two the pushing component of static contact (1) contact or separation, its characterized in that: at least one side of the pushing component is provided with an impact-resistant mechanism, the impact-resistant mechanism comprises a first stop piece (4) which is elastically propped by an elastic component (3) and a second stop piece (5) which is matched with the first stop piece (4) for use, and the second stop piece (5) is arranged on the pushing component and moves synchronously along with the pushing component; the first stop piece (4) and the second stop piece (5) are close to one another and are arranged vertically opposite to one another, the second stop piece (5) can be driven to push the first stop piece (4) to displace when the pushing assembly acts, and therefore the second stop piece (5) can pass through the first stop piece (4).

2. The mechanical shock resistant dc contactor according to claim 1, wherein: the anti-impact mechanism further comprises a fixed support (6), and the first stop piece (4) is arranged in the fixed support (6) and can slide in the fixed support (6) along the direction towards or away from the second stop piece (5).

3. The mechanical shock resistant direct current contactor according to claim 2, wherein: one side of the fixed support (6) facing the pushing assembly is provided with a through hole (601), and one end of the first stop piece (4) penetrates through the through hole (601) and extends to the position above the corresponding end of the second stop piece (5); the other end of the first stop piece (4) surrounds the periphery and is provided with a stop table (401), and the stop table (401) is stopped on the inner side wall of the fixed support (6).

4. A mechanical shock resistant direct current contactor according to claim 3, wherein: the main body part of the first stop piece (4) positioned in the through hole (601) is square and is matched with the size of the through hole (601); the baffle (401) is matched with the size of the inner cavity of the fixed bracket (6).

5. The mechanical shock resistant direct current contactor according to claim 2, wherein: the elastic component (3) is arranged in the fixed bracket (6), and the elastic acting force exerted on the first stop piece (4) enables the first stop piece (4) to always have a trend of moving towards the second stop piece (5).

6. The mechanical shock resistant dc contactor according to claim 1, wherein: one end of the first stop piece (4) close to the second stop piece (5) is provided with a first conical head part (402), and the upper side and the lower side of the first conical head part (402) are respectively provided with a first inclined blocking surface;

or one end of the first stop piece (4) close to the second stop piece (5) is provided as a first ball part (403).

7. The mechanical shock resistant dc contactor according to claim 1, wherein: one end, close to the first stop piece (4), of the second stop piece (5) is provided with a second conical head (501), and the upper side and the lower side of the second conical head (501) are respectively provided with a second inclined stop surface;

or one end of the second stop piece (5) close to the first stop piece (4) is provided as a second ball head part (502).

8. The mechanical shock resistant dc contactor according to claim 1, wherein: the pushing assembly comprises an insulating base (7), a frame body support (8) and a spring (9), wherein the lower part of the frame body support (8) is integrally injection molded in the insulating base (7), the movable reed (2) transversely penetrates through the frame body support (8), and two ends of the spring (9) are elastically abutted between the movable reed (2) and the insulating base (7).

9. The mechanical shock resistant dc contactor according to claim 8, wherein: the other end of the second stop piece (5) is fixedly connected with the insulating base (7) in any mode of integral injection molding, riveting, clamping or fastening.

10. The mechanical shock resistant dc contactor according to claim 1, wherein: the impact resistance mechanism is provided with two groups which are respectively arranged at two opposite sides of the pushing component.