CN113990711A

CN113990711A - Device for fine-tuning standby stroke of auxiliary contact of contactor

Info

Publication number: CN113990711A
Application number: CN202111280273.2A
Authority: CN
Inventors: 符石保; 曾亲武; 茶岩
Original assignee: GUIZHOU TIANYI ELECTRICAL CO Ltd
Current assignee: GUIZHOU TIANYI ELECTRICAL CO Ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-01-28
Anticipated expiration: 2041-11-01
Also published as: CN113990711B

Abstract

A device for finely adjusting the spare stroke of an auxiliary contact of a contactor is characterized in that a flange plate is fixed with a shell in a mechanical rivet turning mode, the lower end of a core rod is tightly attached to the flange plate, the core rod is fixed with an iron core through a return spring, the upper end of the core rod is tightly attached to a push rod, the upper end of the push rod is tightly attached to a bushing, the upper end of the bushing is tightly attached to a lower bushing, the upper end of the lower bushing is tightly attached to a nut, and the nut is screwed with the core rod through threads; the left side and the right side of the push rod are both provided with a microswitch, the two microswitches are respectively fixed on a bracket A and a bracket B through a microswitch reed, a screw and an elastic pad, and the bracket A and the bracket B are fastened on a flange plate through countersunk screws; and a contact spring is arranged on the core rod between the bushing and the lower bushing. The invention has simple structure, the left and right sides are basically not stressed unsmooth, and the spare stroke of the auxiliary contact of the fine adjustment contactor can be realized.

Description

Device for fine-tuning standby stroke of auxiliary contact of contactor

Technical Field

The invention relates to a device for fine-tuning the spare stroke of an auxiliary contact of a contactor.

Background

In the process of designing the auxiliary contact of the contactor, the problems of difficult spatial layout of the auxiliary contact, difficult installation and adjustment of the spare stroke of the auxiliary contact or non-adjustability and the like are often encountered.

Disclosure of Invention

The invention aims to solve the technical problems that when the auxiliary contact of the contactor is used, the space layout of the auxiliary contact of the contactor is difficult, the spare stroke of the auxiliary contact of the contactor can be effectively adjusted, and the performance and the working reliability of the contactor are greatly improved.

In order to solve the technical problems, the invention adopts the following technical scheme:

a device for finely adjusting the spare stroke of an auxiliary contact of a contactor comprises a flange plate, a shell, a core rod, a return spring, an iron core, a push rod, a bushing, a lower bushing, a nut, a micro switch reed, a screw, an elastic cushion, a support A, a support B, a countersunk screw and a contact spring, wherein the flange plate is fixed with the shell in a mechanical rivet turning mode; the left side and the right side of the push rod are both provided with a microswitch, the two microswitches are respectively fixed on a support A and a support B through a microswitch reed, a screw and an elastic pad, and the support A and the support B are fastened on a flange plate through countersunk screws; and a contact spring is arranged on the core rod between the bushing and the lower bushing.

The push rod is arranged right below the reed of the microswitch.

The microswitch comprises a base, a pressure spring, a short conductive piece, a long conductive piece, a positioning clamp, a movable contact spring, a tension spring, a key, a reed and a cover, wherein the pressure spring is arranged in the center of the base, the short conductive pieces are arranged on the bases on two sides of the pressure spring, and the long conductive pieces are arranged on the bases on two sides of the short conductive pieces; the upper part of the pressure spring is connected with the bottom of the positioning clamp, the middle part of the positioning clamp is connected with a movable contact spring arranged on the short conductive piece, and the movable contact spring is fixed on a central column of the base through a tension spring; the locating card top is installed the button, and the reed is installed to the button top, and the reed is installed on covering, and the lid is installed in the base top.

The beneficial effect of adopting above-mentioned technical scheme is:

the invention has simple structure, the left and right sides are basically not stressed unsmooth, and the spare stroke of the auxiliary contact of the fine adjustment contactor can be realized.

Drawings

Fig. 1 is a schematic structural diagram of the device for trimming the backup stroke of the auxiliary contact of the contactor according to the present invention.

In the figure: 1-flange plate, 2-shell, 3-core rod, 4-return spring, 5-iron core, 6-push rod, 7-bush, 8-lower bush, 9-nut, 10-microswitch, 11-microswitch reed, 12-screw and elastic pad, 13-support A, 14-support B, 15-countersunk screw and 16-contact spring.

Fig. 2 is a schematic view of the push rod of fig. 1.

Fig. 3 is a top view of fig. 2.

Fig. 4 is a schematic structural diagram of the microswitch in fig. 1.

In the figure: 10.1-base, 10.2-pressure spring, 10.3-short conductive piece, 10.4-long conductive piece, 10.5-positioning card, 10.6-moving contact piece, 10.7-tension spring, 10.8-push button, 10.9-spring piece and 10.10-cover.

Fig. 5 is a state diagram of the micro switch contacts when the contactor is not in operation.

Fig. 6 is a state diagram of the contacts when the movement stroke of the iron core is Y + and the normally closed point is standby.

Fig. 7 is a state diagram of the contacts when the core movement stroke is Y + normally closed point standby + not greater than X.

Fig. 8 is a state diagram of the contacts when the core movement stroke is Y + normally closed point standby + X.

Fig. 9 is a state diagram of the contacts when the core movement stroke is the magnetic gap.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

a device for trimming the backup stroke of an auxiliary contact of a contactor, as shown in fig. 1: the core rod type spring washer comprises a flange plate 1, a shell 2, a core rod 3, a return spring 4, an iron core 5, a push rod 6, a bushing 7, a lower bushing 8, a nut 9, a micro switch 10, a micro switch reed 11, a screw, an elastic pad 12, a support A13, a support B14, a countersunk screw 15 and a contact spring 16, wherein the flange plate 1 is fixed with the shell 2 in a mechanical riveting mode, the lower end of the core rod 3 is tightly attached to the flange plate 1, the core rod 3 is fixed with the iron core 5 through the return spring 4, the core rod 3 moves along with the movement of the iron core 5, the push rod 6 is tightly attached to the upper end of the core rod 3, the bushing 7 is tightly attached to the upper end of the push rod 6, the lower bushing 8 is tightly attached to the upper end of the bushing 7, the upper end of the lower bushing 8 is tightly attached to the nut 9, and the nut 9 is screwed with the core rod 3 through threads; the left side and the right side of the push rod 6 are both provided with the micro switches 10, the design ensures that the force on the left side and the force on the right side are balanced, the two micro switches 10 are respectively fixed on a bracket A13 and a bracket B14 through a micro switch reed 11, a screw and an elastic pad 12, and the bracket A13 and the bracket B14 are fastened on the flange plate 1 through a sunk screw 15; a contact spring 16 is mounted on the mandrel 3 between the bush 7 and the lower bush 8. The push rod 6 is arranged right below the microswitch reed 11, and the conversion design of the microswitch 10 is as follows:

a) when the contactor acts, the iron core 5 drives the linkage structure core rod 3 to move;

b) the core rod 3 drives the push rod 6 to move upwards, and the push rod 6 presses the microswitch reed 11;

c) the microswitch reed 11 presses the movement mechanism of the microswitch 10, and finally the contact of the microswitch 10 is switched from a normally closed state to a normally open state.

As shown in fig. 4: the microswitch 10 comprises a base 10.1, a pressure spring 10.2, a short conductive piece 10.3, a long conductive piece 10.4, a positioning card 10.5, a movable contact spring, a tension spring 10.7, a key 10.8, a spring piece 10.9 and a cover 10.10, wherein the pressure spring 10.2 is installed in the center of the base 10.1, the short conductive piece 10.3 is installed on the base 10.1 at two sides of the pressure spring 10.2, and the long conductive piece 10.4 is installed on the base 10.1 at two sides of the short conductive piece 10.3; the upper part of the pressure spring 10.2 is connected with the bottom of a positioning card 10.5, the middle part of the positioning card 10.5 is connected with a movable contact spring 10.6 arranged on a short conductive piece 10.3, and the movable contact spring 10.6 is fixed on a central column of a base 10.1 through a tension spring 10.7; the top of the locator card 10.5 is provided with a key 10.8, a reed 10.9 is arranged above the key 10.8, the reed 10.9 is arranged on a cover 10.10, and the cover 10.10 is arranged above a base 10.1. In order to improve the operational reliability of the micro switch 10, that is, to prevent the contact points of the micro switch 10 from being abnormal due to mechanical and electrical wear, the backup stroke must be specified, and the description of the backup stroke is as follows:

according to the movement mechanism of the contactor, the micro switch has the following movement states:

1) when the contactor is not operated, the contact state of the micro switch 10 is as shown in fig. 5;

2) after the product works for a period of time, when the movement stroke of the iron core 5 is Y + normally closed point for standby, the contact state of the microswitch 10 is as shown in fig. 6;

3) after the product works for a period of time, when the movement stroke of the iron core 5 is Y + the normally closed point is reserved + is not more than X, the contact state of the microswitch 10 is shown in figure 7;

4) after the product works for a period of time, when the movement stroke of the iron core 5 is Y + the normally closed point standby + X, the contact state of the microswitch 10 is shown in figure 8;

5) after the product works for a period of time, when the movement stroke of the iron core 5 is a magnetic gap (Y + normally closed point standby + X + normally open point standby), the contact state of the microswitch 10 is as shown in fig. 9;

in accordance with the above-described movement state of the microswitch 10, it is important to define the backup stroke. Therefore, the structure of the push rod 6 is designed, the purpose of fine adjustment of the standby stroke of the microswitch 10 can be realized, and meanwhile, the push rod 6 is made of stainless steel materials, so that fatigue such as plastic deformation is not easy to generate, and the microswitch 10 fails.

The structure of the push rod 6 is verified by four million times of mechanical and electrical life tests (reliability tests) and is qualified. The structure is shown to realize the standby stroke of the microswitch 10 which is easy to adjust, and meanwhile, the reliability is high, and the processing is simpler.

Claims

1. The utility model provides a device of spare stroke of fine setting contactor auxiliary contact which characterized in that: the novel iron core comprises a flange plate (1), a shell (2), a core rod (3), a return spring (4), an iron core (5), a push rod (6), a bushing (7), a lower bushing (8), a nut (9), a micro switch (10), a micro switch reed (11), a screw, an elastic pad (12), a support A (13), a support B (14), a sunk screw (15) and a contact spring (16), wherein the flange plate (1) is fixed with the shell (2) in a mechanical rivet turning mode, the lower end of the core rod (3) is tightly attached to the flange plate (1), the core rod (3) is fixed with the iron core (5) through the return spring (4), the push rod (6) is tightly attached to the upper end of the core rod (3), the bushing (7) is tightly attached to the upper end of the push rod (6), the lower bushing (8) is tightly attached to the upper end of the bushing (7), the upper end of the lower bushing (8) is tightly attached to the nut (9), and the nut (9) is screwed with the core rod (3) through threads; micro switches (10) are mounted on the left side and the right side of the push rod (6), the two micro switches (10) are fixed on a support A (13) and a support B (14) through micro switch reeds (11), screws and elastic pads (12), and the support A (13) and the support B (14) are fastened on the flange plate (1) through countersunk screws (15); and a contact spring (16) is arranged on the mandrel (3) between the bushing (7) and the lower bushing (8).

2. The device for trimming the backup travel of the auxiliary contact of a contactor according to claim 1, wherein: the push rod (6) is arranged right below the microswitch reed (11).

3. The device for trimming the backup travel of the auxiliary contact of a contactor according to claim 1, wherein: the microswitch (10) comprises a base (10.1), a pressure spring (10.2), a short conductive piece (10.3), a long conductive piece (10.4), a positioning card (10.5), a movable contact spring, a tension spring (10.7), a key (10.8), a spring piece (10.9) and a cover (10.10), wherein the pressure spring (10.2) is installed at the center of the base (10.1), the short conductive piece (10.3) is installed on the base (10.1) on two sides of the pressure spring (10.2), and the long conductive piece (10.4) is installed on the base (10.1) on two sides of the short conductive piece (10.3); the upper part of the pressure spring (10.2) is connected with the bottom of a positioning clamp (10.5), the middle part of the positioning clamp (10.5) is connected with a movable contact spring (10.6) arranged on a short conductive piece (10.3), and the movable contact spring (10.6) is fixed on a central column of the base (10) · (1) through a tension spring (10.7); the top of the positioning card (10.5) is provided with a key (10.8), a reed (10.9) is arranged above the key (10.8), the reed (10.9) is arranged on the cover (10.10), and the cover (10.10) is arranged above the base (10.1).