阅读说明：本技术 直流接触器辅助机构 (DC contactor auxiliary mechanism ) 是由 邱广庭 杨鑫烨 文艳慧 顾春朋 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种直流接触器辅助机构,直流接触器包括灭弧腔和设置于灭弧腔外的驱动线圈,该辅助机构包括屏蔽圈、触发导体和检测组件,屏蔽圈内置于灭弧腔中,触发导体和检测组件均分别内置于屏蔽圈围成的空间中,且在驱动线圈处于未通电状态或者通电状态时,触发导体能够相应与检测组件上的连通弹片相接触或者断开接触,进而使得检测组件相应处于导通状态或者断开状态。该直流接触器辅助机构的结构简单、新颖、合理,能够大大提升直流接触器工作时的精准性、稳定性和可靠性。(The invention discloses an auxiliary mechanism of a direct current contactor, wherein the direct current contactor comprises an arc extinguishing cavity and a driving coil arranged outside the arc extinguishing cavity, the auxiliary mechanism comprises a shielding ring, a trigger conductor and a detection assembly, the shielding ring is arranged in the arc extinguishing cavity, the trigger conductor and the detection assembly are respectively arranged in a space defined by the shielding ring, and when the driving coil is in an unpowered state or a powered state, the trigger conductor can be correspondingly contacted with or disconnected from a communicating elastic sheet on the detection assembly, so that the detection assembly is correspondingly in a conducting state or a disconnected state. The direct current contactor auxiliary mechanism is simple, novel and reasonable in structure, and can greatly improve the accuracy, stability and reliability of the direct current contactor during working.)

1. The utility model provides a direct current contactor complementary unit, direct current contactor include arc-extinguishing chamber (1) and set up in the outer drive coil in arc-extinguishing chamber (1), its characterized in that: the auxiliary mechanism comprises a shielding ring (20), a trigger conductor (21) and a detection assembly, wherein the shielding ring (20) is arranged in an arc extinguishing chamber (1), the trigger conductor (21) and the detection assembly are respectively arranged in a space surrounded by the shielding ring (20), and when the driving coil is in an unpowered state or a powered state, the trigger conductor (21) can correspondingly contact with or break contact with a communicating elastic sheet (220) on the detection assembly, so that the detection assembly is correspondingly in a switched-on state or a switched-off state.

2. The dc contactor assist mechanism of claim 1, wherein: the arc extinguishing chamber is provided with a ceramic tube (10), a magnetic pole plate (11) and a connecting ring (12), wherein the ceramic tube (10) is of a hollow cylinder structure with an open lower side, and the magnetic pole plate (11) is hermetically and fixedly connected to the lower side of the ceramic tube (10) through the connecting ring (12), namely the ceramic tube (10), the magnetic pole plate (11) and the connecting ring (12) jointly enclose the arc extinguishing chamber (1);

the driving coil is positioned and arranged below the arc extinguishing chamber (1).

3. The dc contactor assist mechanism of claim 2, wherein: the shielding ring (20) can be vertically stopped and is arranged in the arc extinguishing chamber (1) in a rotating manner in the circumferential direction;

the trigger conductor (21) is movably arranged in a space surrounded by the shielding ring (20), the detection assembly is provided with two communicating elastic sheets (220) which are arranged below the trigger conductor (21), and when the driving coil is in a non-electrified state, the trigger conductor (21) can be pressed against the two communicating elastic sheets (220), so that the two communicating elastic sheets (220) are communicated with each other, and the detection assembly is in a conducting state; when the driving coil is in a power-on state, the trigger conductor (21) can be disconnected from the two communicating elastic sheets (220), so that the detection assembly is in a disconnected state.

4. The dc contactor assist mechanism of claim 3, wherein: the shielding ring (20) is provided with a ring-shaped shielding base body (200) and two limiting shielding plates (201) which are in a vertical plate shape and are respectively positioned and connected to the inner side wall of the shielding base body (200), and the two limiting shielding plates (201) are also symmetrically distributed around the vertical center line of the shielding base body (200);

in addition, the structure that the shielding ring (20) can be vertically stopped and can rotate in the circumferential direction and is arranged in the arc extinguishing chamber (1) is realized as follows: a plurality of limit salient points (110) are arranged on the upper side surface of the magnetic pole plate (11) in a circular array manner; the lower side of the shielding base body (200) is freely arranged on the upper side face of the magnetic pole plate (11) and in a space surrounded by the limit salient points (110), and the upper sides of the two limit shielding plates (201) are freely abutted against the inner surface of the top of the ceramic tube (10).

5. The dc contactor assist mechanism of claim 3, wherein: the structure for movably arranging the trigger conductor (21) in the space surrounded by the shielding ring (20) is as follows: the direct current contactor also comprises a movable iron core (3) movably arranged in a space enclosed by the driving coils and a push rod (4) vertically arranged, the lower end of the push rod (4) is tightly matched and inserted in the movable iron core (3), the upper end of the push rod (4) is movably inserted in the shielding ring (20), and the trigger conductor (21) is connected with the upper end of the push rod (4) in a positioning way;

when the driving coil is in a non-electrified state, the trigger conductor (21) can be pressed against the two communicating elastic sheets (220) under the action of the push rod (4), so that the two communicating elastic sheets (220) are communicated, and the detection assembly is in a conducting state; when the driving coil is in a power-on state, the trigger conductor (21) can move upwards along with the push rod (4), and then the trigger conductor (21) is disconnected from the two communicating elastic sheets (220), so that the detection assembly is in a disconnected state.

6. The dc contactor assist mechanism of claim 5, wherein: the structure for realizing the positioning connection of the trigger conductor (21) and the upper end of the push rod (4) is as follows: the auxiliary mechanism further comprises a connecting block (23) which is made of plastic materials and is fixedly connected to the upper end of the push rod (4), and the trigger conductor (21) is positioned and embedded on the connecting block (23).

7. The dc contactor assist mechanism of claim 4, wherein: the detection assembly is provided with two detection conductors (22), each detection conductor (22) is provided with a vertical rod-shaped support rod (221), a transverse support piece (222) integrally formed at the middle upper part of the support rod (221), a signal pin (223) which is vertical rod-shaped and fixedly connected to the upper surface of the transverse support piece (222), and a communicating elastic piece (220) integrally formed at the bottom of the support rod (221), wherein the two support rods (221) are respectively positioned and arranged in a space surrounded by the shielding ring (20), and the upper ends of the two signal pins (223) are also respectively extended out of the arc extinguishing chamber (1).

8. The dc contactor assist mechanism of claim 7, wherein: the two supporting rods (221) are uniformly positioned and arranged in the space surrounded by the shielding ring (20) respectively, and the structure is as follows: an installation block (24) is positioned and arranged on the inner side wall of one of the limiting shielding plates (201), two clamping grooves (240) are arranged on the installation block (24), and the two support rods (221) are correspondingly clamped in the two clamping grooves (240) respectively.

9. The dc contactor assist mechanism of claim 7, wherein: the transverse supporting sheet (222) is L-shaped, and the communicating elastic sheet (220) is Z-shaped.

Technical Field

The invention relates to the technical field of direct current contactors, and particularly provides an auxiliary mechanism of a direct current contactor.

Background

In order to determine the operating state of the dc contactor, it is necessary to determine the operating state of the dc contactor by turning on or off the auxiliary contact, thereby improving safety when the product is actually used.

However, because of the sealing design of the dc contactor, the dc contactor on the market at present is generally not provided with an auxiliary contact, and even if the dc contactor is provided with the auxiliary contact, the dc contactor mostly adopts the form of a micro switch or an auxiliary contact piece. The method comprises the following steps that 1) whether a contactor is conducted or not is judged by adopting a microswitch, a transmission push rod is mainly driven, a plastic sheet is arranged on the transmission push rod, and the microswitch is toggled to be switched on and off when the plastic sheet moves up and down along with a transmission rod, so that the working state of a main contact is judged. However, the micro switch has a small stroke, which easily causes the inconsistent state of the auxiliary contact and the main contact, thereby affecting the performance of the contactor. 2) Whether the contactor is conducted or not is judged by adopting the auxiliary contact piece, an auxiliary push rod which moves up and down along with the transmission push rod is mainly designed, the auxiliary push rod drives the two auxiliary contact pieces to contact and separate, and then the working state judgment of the main contact is realized. However, in the method of designing the two auxiliary contact pieces to be in direct contact, malfunction risks occur during a mechanical shock test, and the performance of the contactor is affected.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

In order to overcome the defects, the invention provides an auxiliary mechanism of a direct current contactor, which is simple, novel and reasonable in structure and can greatly improve the accuracy, stability and reliability of the direct current contactor during working.

The technical scheme adopted by the invention for solving the technical problem is as follows: the utility model provides a direct current contactor complementary unit, direct current contactor include the arc extinguishing chamber with set up in drive coil outside the arc extinguishing chamber, this complementary unit includes shielding circle, trigger conductor and detection module, place in the shielding circle in the arc extinguishing chamber, trigger conductor with detection module equally divide and do not place in the space that the shielding circle encloses, and when the drive coil is in not on state or on state, trigger conductor can corresponding with intercommunication shell fragment on the detection module contacts or the disconnection contact, and then makes detection module is corresponding in on state or off state.

As a further improvement of the invention, the arc extinguishing chamber is provided with a ceramic tube, a magnetic pole plate and a connecting ring, wherein the ceramic tube is of a hollow cylinder structure with an open lower side, and the magnetic pole plate is sealed and fixedly connected to the lower side of the ceramic tube through the connecting ring, namely the ceramic tube, the magnetic pole plate and the connecting ring jointly surround the arc extinguishing chamber;

the drive coil is positioned and arranged below the arc extinguishing chamber.

As a further improvement of the invention, the shielding ring can be vertically stopped and is arranged in the arc extinguishing chamber in a rotating manner in the circumferential direction;

the trigger conductor is movably arranged in a space surrounded by the shielding ring, the detection assembly is provided with two communicating elastic sheets which are arranged below the trigger conductor, and when the driving coil is in a non-electrified state, the trigger conductor can be pressed against the two communicating elastic sheets so that the two communicating elastic sheets are communicated and the detection assembly is in a conducting state; and when the driving coil is in a power-on state, the trigger conductor can be disconnected from the two communicating elastic sheets, so that the detection assembly is in a disconnected state.

As a further improvement of the invention, the shielding ring is provided with a ring-shaped shielding base body and two vertical limiting shielding plates which are positioned and connected to the inner side wall of the shielding base body respectively, and the two limiting shielding plates are also symmetrically distributed around the vertical center line of the shielding base body;

in addition, the structure that realizes that the shielding circle can vertical locking and circumferencial direction pivoted place in the arc extinguishing chamber is: a plurality of limit salient points are arranged on the upper side surface of the magnetic pole plate in an annular array; the lower side of the shielding base body is freely arranged on the upper side face of the magnetic pole plate and in a space surrounded by the plurality of limiting salient points, and the upper sides of the two limiting shielding plates are freely abutted against the inner surface of the top of the ceramic tube.

As a further improvement of the present invention, the structure that the trigger conductor is movably arranged in the space surrounded by the shielding ring is implemented as follows: the direct current contactor also comprises a movable iron core movably arranged in a space enclosed by the driving coils and a push rod vertically arranged, the lower end of the push rod is tightly matched and inserted in the movable iron core, the upper end of the push rod is movably inserted in the shielding ring, and the trigger conductor is connected with the upper end of the push rod in a positioning way;

when the driving coil is in a non-electrified state, the trigger conductor can be pressed against the two communicating elastic sheets under the action of the push rod, so that the two communicating elastic sheets are communicated, and the detection assembly is in a conducting state; and when the driving coil is in a power-on state, the trigger conductor can move upwards along with the push rod, and then the trigger conductor is disconnected from the two communicating elastic sheets, so that the detection assembly is in a disconnected state.

As a further improvement of the present invention, the structure for realizing the positioning connection of the trigger conductor and the upper end of the push rod is as follows: the auxiliary mechanism further comprises a connecting block which is made of plastic materials and is fixedly connected to the upper end of the push rod, and the trigger conductor is positioned and embedded on the connecting block.

As a further improvement of the present invention, the detecting assembly has two detecting conductors, each of the detecting conductors has a vertical rod-shaped supporting rod, a horizontal supporting piece integrally formed at the middle upper portion of the supporting rod, a vertical rod-shaped signal pin fixedly connected to the upper surface of the horizontal supporting piece, and the communicating elastic piece integrally formed at the bottom of the supporting rod, wherein the two supporting rods are respectively positioned and embedded in the space surrounded by the shielding ring, and the upper ends of the two signal pins also respectively extend out of the arc extinguishing chamber.

As a further improvement of the invention, the structure for respectively positioning and arranging the two support rods in the space surrounded by the shielding ring is as follows: an installation block is positioned and arranged on the inner side wall of one of the limiting shielding plates, two clamping grooves are formed in the installation block, and the two supporting rods are correspondingly clamped in the two clamping grooves respectively.

As a further improvement of the invention, the transverse supporting sheet is L-shaped, and the communicating elastic sheet is Z-shaped.

The invention has the beneficial effects that: the invention improves and innovates an auxiliary mechanism of the direct current contactor, designs a trigger conductor which moves up and down along with the push rod and two detection conductors used as signal output, and realizes that the trigger conductor is disconnected from or contacted with the communicating elastic sheets on the two detection conductors by the up-and-down movement of the trigger conductor, thereby realizing that the detection component is in a disconnected state or a connected state, namely, the working state of the direct current contactor can be judged by the connected or disconnected state of the detection component. Through utilizing complementary unit can realize even under 100 g's acceleration of gravity, trigger conductor and two detect and also can not take place the malfunction and laminate between the conductor to direct current contactor during operation's accurate nature and stability have been promoted greatly. And secondly, a shielding ring is also arranged in the auxiliary mechanism, so that a good physical isolation effect is achieved, and the reliability of the direct current contactor during working can be greatly improved.

Drawings

Fig. 1 is a schematic partial perspective view of a dc contactor equipped with the auxiliary mechanism of the present invention;

FIG. 2 is a schematic top view of the DC contactor shown in FIG. 1;

FIG. 3 is a schematic view of the cross-sectional structure A-A shown in FIG. 2;

FIG. 4 is an exploded view of the DC contactor shown in FIG. 1;

FIG. 5 is a schematic view of the assembly relationship between the trigger conductor and the detection conductor according to the present invention;

fig. 6 is a schematic view of the auxiliary mechanism according to the present invention in an operating state when the driving coil is in a power-on state;

fig. 7 is a schematic view of the operation state of the auxiliary mechanism according to the present invention when the driving coil is in a non-energized state.

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

1-arc extinguishing chamber; 10-a ceramic tube; 11-a magnetic pole plate; 110-limit salient points; 12-a connecting ring; 20-a shielding ring; 200-shielding a substrate; 201-a spacing shield plate; 21-a trigger conductor; 22-a detection conductor; 220-connecting the elastic sheet; 221-a support bar; 222-a lateral support tab; 223-signal pin; 23, connecting blocks; 24-a mounting block; 240-card slot; 3, a movable iron core; 4-push rod.

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific embodiments, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical significance.