CN210110660U

CN210110660U - Auxiliary contact group for contactor

Info

Publication number: CN210110660U
Application number: CN201920951372.0U
Authority: CN
Inventors: 黄庆; 王婷婷; 刘纪超; 冯大成; 朱华
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-02-21
Anticipated expiration: 2029-06-21

Abstract

An auxiliary contact group for a contactor, comprising a housing (1), characterized in that: the contact support (2) is arranged on the shell (1) and can slide relative to the shell (1), and the contact support (2) can be switched on and off when arranged on the shell (1) and can slide relative to the shell (1) so as to realize the switching on and off of a microswitch contact system (B); by adopting the micro switch, particularly the sealed micro switch, the defect that the contact connection is unreliable due to the pollution of the surface of the contact can be effectively avoided, and the difficult problem of poor connection of low-voltage and weak-current signals is solved; meanwhile, in the driving mode of the microswitch, the contact support is provided with a spring buffer element, so that the mechanical damage of the contact support to the microswitch is effectively avoided, and the service life of a product is prolonged.

Description

Auxiliary contact group for contactor

Technical Field

The utility model belongs to the technical field of the contactor, specifically say so and relate to an auxiliary contact group for contactor.

Background

The contactor is characterized in that a magnetic field is generated by current flowing through a coil, so that a contact is closed, and effective power transmission is realized. The contactor is composed of electromagnetic system (moving iron core, static iron core, electromagnetic coil), contact system and arc-extinguishing device. When the electromagnetic coil of the contactor is electrified, a strong magnetic field is generated, so that the static iron core generates electromagnetic attraction to attract the movable iron core and drive the contact to act, and the contact is closed; when the coil is powered off, the electromagnetic attraction disappears, the movable iron core is released under the action of the counterforce spring, the contact is restored, and the contact is disconnected.

The auxiliary contact group of the contactor commonly used in the current market usually adopts a direct-acting double-breakpoint contact or a totally-closed microswitch. The direct-acting double-break contact structure has the advantages that because the contact structure is open, the surface of the contact is easy to be polluted under the working conditions of large dust and moisture, and the contact can not be reliably connected to low-voltage and weak-current signals; and adopt the micro-gap switch form, often drive micro-gap switch through contact support, do not set up the bolster or adopt the shell fragment as the bolster, easily cause micro-gap switch to damage or trigger inefficacy, influence the life of product.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the technical problem that the connection of the auxiliary contact of the prior contactor is unreliable in low voltage and weak current signals, and provides an auxiliary contact group for the contactor, which adopts a micro switch, in particular a sealed micro switch, and can effectively avoid the defect that the contact connection is unreliable due to the pollution of the contact surface, thereby solving the problem of poor connection of low voltage and weak current signals; meanwhile, in the driving mode of the microswitch, the contact support is provided with a spring buffer element, so that the mechanical damage of the contact support to the microswitch is effectively avoided, and the service life of a product is prolonged.

Technical scheme

In order to realize the technical purpose, the utility model provides a pair of an auxiliary contact group for contactor, it includes the casing, its characterized in that: the contact support is arranged on the shell and can slide relative to the shell, and the contact support can realize the connection and disconnection of a microswitch contact system in the process of sliding relative to the shell;

a microswitch trigger mechanism in the microswitch contact system is arranged on the contact support, and the contact support drives the microswitch trigger mechanism to be in contact with and separated from the microswitch in the process of sliding on the shell relative to the shell so as to realize the connection and disconnection of the microswitch contact system.

Further, the micro-switch trigger mechanism comprises a spring, wherein the spring is arranged in a second mounting groove on the contact support, one end of the spring abuts against the upper groove wall of the second mounting groove, the other end of the spring abuts against a push rod, the push rod is arranged on a groove hole in the bottom of the second mounting groove and can slide in the groove hole, the shell is provided with the micro-switch, and a swinging rod of the micro-switch corresponds to the push rod.

Further, the microswitch is connected with a circuit board, the circuit board is connected with a contact plate, and the circuit board and the contact plate are both arranged on the shell.

Further, the push rod is provided with a convex edge, when the push rod slides in the groove hole, the convex edge is limited by the hole wall of the groove hole, and the rod part of the push rod extends out of the groove hole and corresponds to the swinging rod of the microswitch.

Furthermore, the upper end of the spring is arranged on a bulge of the upper groove wall of the second mounting groove, and the lower end of the spring is arranged in a groove of the upper end surface of the push rod.

Advantageous effects

The utility model provides an auxiliary contact group for a contactor, which adopts a micro switch, in particular a sealed micro switch, can effectively avoid the defect that the contact connection is unreliable due to the pollution of the surface of the contact, and solves the difficult problem of poor connection of low voltage and weak current signals; meanwhile, in the driving mode of the microswitch, the contact support is provided with a spring buffer element, so that the mechanical damage of the contact support to the microswitch is effectively avoided, and the service life of a product is prolonged.

Drawings

Fig. 1a is a schematic structural diagram of a combined auxiliary contact set according to an embodiment of the present invention.

Fig. 1b is a schematic structural diagram of the housing in the embodiment of the present invention.

Fig. 2a is a schematic structural diagram of a direct-acting double-break contact system according to an embodiment of the present invention.

Fig. 2b is a schematic structural diagram of a bridge contact according to an embodiment of the present invention.

Fig. 2c is a schematic structural diagram of a spring seat in an embodiment of the present invention.

Fig. 2d is a schematic structural diagram of the direct-acting double-break contact system according to the embodiment of the present invention.

Fig. 2e is a schematic structural diagram of the direct-acting double-break contact system according to the embodiment of the present invention.

Fig. 3a is a schematic structural diagram of a micro switch contact system according to an embodiment of the present invention.

Fig. 3b is a schematic structural diagram of the embodiment of the present invention in which the push rod just starts to contact the swing lever.

Fig. 3c is a schematic structural diagram of the embodiment of the present invention in which the push rod completely presses the swing lever.

Fig. 3d is a schematic structural diagram of the installation of the push rod in the embodiment of the present invention.

Fig. 3e is a schematic structural diagram of the spring installation in the embodiment of the present invention.

Fig. 3f is a schematic structural diagram of the second mounting groove in the embodiment of the present invention.

Fig. 3g is a schematic structural diagram of the push rod in the embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Examples

As shown in fig. 1a and 1B, a combined auxiliary contact group for a contactor comprises a housing 1, a contact support 2 is mounted on the housing 1 and can slide relative to the housing 1, and the contact support 2 is mounted on the housing 1 and can realize the connection and disconnection of a direct-acting double-breakpoint contact system a and a microswitch contact system B in the process of sliding relative to the housing 1;

the direct-acting double-breakpoint contact A0 in the direct-acting double-breakpoint contact system A and the microswitch triggering mechanism B0 in the microswitch contact system B are arranged on the contact support 2, and the contact support 2 drives the direct-acting double-breakpoint contact triggering mechanism A0 and the microswitch triggering mechanism B0 to be in contact with and separated from the corresponding double-breakpoint contact A1 and the microswitch B1 in the process of sliding on the shell 1 relative to the shell 1 so as to realize the connection and disconnection of the direct-acting double-breakpoint contact system A and the microswitch contact system B.

As shown in fig. 2a, 2b and 2c, the direct-acting double-break contact a0 includes a bridge contact a2, a bottom a20 of the bridge contact a2 is pressed against the upper groove wall 201a of the mounting groove 201 of the contact holder 2 by an upper end of a contact spring A3, a lower end of the contact spring A3 is mounted on an abutting portion a40 of a spring seat a4, tapered limiting portions a41 on both sides of the spring seat a4 are mounted on the corresponding shaped inner groove 101 of the housing 1, and the double-break contact a1 is fixedly mounted on the housing 1 corresponding to the bridge contact a 2.

As shown in fig. 2d and 2e, the operation process of the direct-acting double-break contact system a is as follows: when the contact bracket 2 is at the initial position of the housing 1, the double-breakpoint contact a1 installed on the housing 1 is assembled above the bridge contact a2 installed on the contact bracket 2, and as the contact spring A3 is compressed, the contact spring A3 generates a reverse acting force to push the bridge contact a2 to the double-breakpoint contact a1, so as to form the contact connection, as shown in fig. 2 d; when the contact support 2 slides downwards in the housing 1, the upper groove wall 201a of the first mounting groove 201 of the contact support 2 drives the bridge contact A2 to be separated from the double-breakpoint contact A1, so that the disconnection of the contact is formed.

As shown in fig. 3a, the microswitch triggering mechanism B0 comprises a spring B2, the spring B2 is installed in the second mounting groove 202 of the contact carrier 2, one end of the spring B2 abuts against the upper groove wall 202a of the second mounting groove 202, and the other end abuts against a push rod B3, as shown in fig. 3d, the push rod B3 is installed on a slot hole 202B at the bottom of the second mounting groove 202, the push rod B3 can slide in the slot hole 202B, and the spring B2 can be pressed during the sliding process; a micro switch B1 is arranged on the shell 1, and a swing rod B101 of the micro switch B1 corresponds to the push rod B3. The microswitch B1 is connected with a circuit board B5, the circuit board B5 is connected with a contact board B4, and the circuit board B5 and the contact board B4 are both mounted on the shell 1.

As shown in fig. 3g, the push rod B3 has a convex edge B301, when the push rod B3 slides in the slot 202B, the convex edge B301 is limited by the wall of the slot 202B, and the rod of the push rod B3 extends out of the slot 202B and corresponds to the swing rod B101 of the microswitch B1. As shown in fig. 3f and 3e, the upper end of the spring B2 is mounted on the protrusion 202a01 of the upper groove wall 202a of the second mounting groove 202, and the lower end is mounted in the groove B302 of the upper end face of the push rod B3. The protrusion 202a01 and the groove B302 are circular.

As shown in fig. 3a, when the contact holder 2 starts to slide in the housing 1, the push rod B3 and the spring B2 mounted on the contact holder 2 operate synchronously, as shown in fig. 3B, when the bottom surface of the rod portion of the push rod B3 moves to contact the swing rod B10 of the micro switch B1, the swing rod B101 is pressed to move, the micro switch B1 is triggered to operate, and when the swing rod B101 moves to the right position, the contact holder 2 continues to move, and the push rod B101 moves reversely along the moving direction of the contact holder 2 until the contact holder 2 slides to the right position, as shown in fig. 3 c.

The structure, proportion, size, quantity, etc. shown in the attached drawings of the embodiment of the present invention are only used for matching with the contents disclosed in the specification, so as to be known and read by people familiar with the art, not for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and the modification of any structure, the change of proportion relation or the adjustment of size should still fall within the range that the technical contents can be covered without affecting the function that the present invention can produce and the purpose that can be achieved. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", "clockwise", "counterclockwise", etc. used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are considered to be the scope of the present invention without substantial changes in the technical content.

Claims

1. An auxiliary contact group for a contactor, comprising a housing (1), characterized in that: the contact support (2) is arranged on the shell (1) and can slide relative to the shell (1), and the contact support (2) can be switched on and off when arranged on the shell (1) and can slide relative to the shell (1) so as to realize the switching on and off of a microswitch contact system (B);

a microswitch trigger mechanism (B0) in the microswitch contact system (B) is arranged on the contact support (2), and the contact support (2) drives the microswitch trigger mechanism (B0) to be in contact with and separated from the microswitch (B1) in the process of sliding on the shell (1) relative to the shell (1) to realize the connection and disconnection of the microswitch contact system (B).

2. An auxiliary contact set for a contactor as claimed in claim 1, wherein: micro-gap switch trigger mechanism (B0) includes spring (B2), spring (B2) dress is in one end supports in the second (202) of mounting groove on contact carrier (2) last cell wall (202a) of the second (202) of mounting groove, and the other end supports push rod (B3), push rod (B3) dress is in on slotted hole (202B) of the second (202) bottom of mounting groove, push rod (B3) can slide in slotted hole (202B), micro-gap switch (B1) is equipped with on casing (1), rocking beam (B101) of micro-gap switch (B1) with push rod (B3) correspond.

3. An auxiliary contact set for a contactor as claimed in claim 2, wherein: the microswitch (B1) is connected with a circuit board (B5), the circuit board (B5) is connected with a contact plate (B4), and the circuit board (B5) and the contact plate (B4) are both arranged on the shell (1).

4. An auxiliary contact set for a contactor as claimed in claim 2, wherein: the push rod (B3) is provided with a convex edge (B301), when the push rod (B3) slides in the slotted hole (202B), the convex edge (B301) is limited by the hole wall of the slotted hole (202B), and the rod part of the push rod (B3) extends out of the slotted hole (202B) and corresponds to the swing rod (B101) of the microswitch (B1).

5. An auxiliary contact set for a contactor as claimed in claim 2, wherein: the upper end of the spring (B2) is arranged on the bulge (202a01) of the upper groove wall (202a) of the second mounting groove (202), and the lower end of the spring (B2) is arranged in the groove (B302) of the upper end surface of the push rod (B3).