WO2018035969A1

WO2018035969A1 - Electromagnetic automatic-reset limit switch

Info

Publication number: WO2018035969A1
Application number: PCT/CN2016/104351
Authority: WO
Inventors: 蔡旭强; 伍海燕; 董青
Original assignee: 蔡旭强
Priority date: 2016-08-23
Filing date: 2016-11-02
Publication date: 2018-03-01
Also published as: TR201807618T1; CN106128812A; CN106128812B

Abstract

An electromagnetic automatic-reset limit switch comprises a base (1) and an upper lid (2) engaged thereon. The base (1) and the upper lid (2) form a hollow cavity, in which a switch box (8) is provided. The switch box (8) is provided with a transmission rod (26) passing therethrough. The transmission rod (26) has one end thereof connected within a pushing rod (11), and the other end thereof connected to a button (28) provided so as to pass through the base (1). A sliding block and a sliding block positioning block (13) are individually provided in the switch box (8). An electromagnetic core (27) provided so as to pass through an electromagnetic coil (23) is connected between the button (28) and the transmission rod (26). A front contact terminal (16) and a back contact terminal (17) are individually provided in the switch box (8). The sliding block is provided with moving contacts (18) capable of respectively coming into contact with the front contact terminal (16) and the back contact terminal (17). One end of the pushing rod (11) faces the sliding block. In the solution, an external force triggers the button (28), and the electromagnetic coil (27) is driven to move the pushing rod (11) on the inside to cause the internal contacts (18, 15) to be disconnected. Upon resetting, the electromagnetic coil (23) is powered, and the electromagnetic coil (27) is rebounds under the effect of a magnetic field to cause the contacts (18, 15) to be connected, thereby realizing an automatic reset function.

Description

Electromagnetic automatic reset limit switch

Technical field

The invention relates to the technical field of elevator safety components, in particular to an electromagnetic automatic reset stroke switch.

Background technique

In many automatic mechanical devices, the stroke switch, also known as the limit switch, is widely used, which uses the collision of mechanical moving parts to make the contact action to achieve the switching on or off the control circuit, thereby achieving a certain control purpose. Usually, such switches are used to limit the position or stroke of mechanical movement, so that the moving machine can realize automatic reset, shifting movement or automatic reciprocating motion according to a certain position, and is particularly suitable for use in an elevator room of a machine room.

However, the difference in mechanical equipment may cause the installation position of the reset switch to also change. Therefore, the prior art usually needs to install a plurality of travel switches to meet the needs of different customers and different occasions, which not only has a complicated structure, but also greatly increases the cost.

Therefore, there is a need for a travel switch that is compact in structure, simpler in operation, safer, more flexible, and more adaptable.

Summary of the invention

The technical problem to be solved by the present invention is the problem that the existing travel switch has a narrow application range.

In order to solve the above technical problem, the technical solution adopted by the present invention is to provide an electromagnetic automatic reset stroke switch, comprising a base and an upper cover fastened thereon, the base and the upper cover form a hollow cavity a switch box is built in the cavity, the switch box is provided with a transmission rod, one end of the transmission rod is connected to the push rod slot, and the other end of the transmission rod is connected to the base. a button on the seat, wherein the switch box is respectively provided with a slider and a slider fixing block, a slider slidingly disposed in the slider fixing block, the button is coupled with a switch of the electromagnetic coil, and an electromagnet core disposed in the electromagnetic coil is connected between the button and the transmission rod a front contact terminal and a rear contact terminal are respectively disposed in the switch box, and the slider is respectively provided with movable contacts that can be in contact with the front contact terminal and the rear contact terminal, and one of the push rods Correct the pair of sliders.

In the above solution, a coil holder is further disposed in the cavity, the electromagnetic coil is wound on the coil holder, the electromagnetic coil is internally provided with a copper sleeve, and the other end of the copper sleeve is positioned The ring groove is snapped into the electromagnetic coil.

In the above solution, the button is provided with a protective cover, and one end of the protective cover is caught in the base.

In the above solution, the central portion of the switch box is provided with a stopper rod, and the stopper rod is perpendicular to the push rod, and the slider is provided with a through hole adapted to the stop rod.

In the above solution, a wire is connected to the electromagnetic coil, and the other end of the wire is soldered to a coil power supply terminal in the base, and a wiring screw is mounted on the coil power supply terminal.

In the above solution, the front contact terminal and the rear contact terminal are respectively provided with a static contact and a wiring screw.

In the above solution, the switch box is respectively provided with a front end compression spring and a rear end compression spring, the front end compression spring and the rear end compression spring are coaxially disposed, and the front end compression spring is disposed respectively with the front Between the two movable contacts that contact the contact terminal and the rear contact terminal, the rear end compression spring is disposed between one of the movable contacts and an inner wall of the switch case.

In the above solution, the upper cover is provided with a groove for installing a sealing ring, and the sealing ring and the protective cover are both made of rubber material.

According to the invention, when the device is faulty or needs to disconnect the circuit, the external force touches the button, and the electromagnet core is displaced to the internal push rod to make the built-in switch contact open. When the reset is required, the electromagnetic coil is supplied, and the electromagnetic The iron core bounces back under the force of the magnetic field to close the contact to realize the automatic reset function, instead of manual mechanical reset, the operation is more convenient, safe and flexible. More useful.

DRAWINGS

Figure 1 is a schematic view of the outline of the present invention;

Figure 2 is a cross-sectional view of the invention in a vertical direction;

Figure 3 is a cross-sectional view of the present invention in the horizontal direction.

detailed description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 3, the electromagnetic automatic reset stroke switch provided by the present invention comprises a base 1 and an upper cover 2 on which the tail portion is inverted, and the base 1 and the upper cover 2 form a hollow cavity. A switch box 8 is built in the cavity, and the transmission rod 26 is disposed and protrudes in the switch box 8 and is inverted in the push rod 11. The other end of the transmission rod 26 is buckled into the button 28 disposed on the base 1. The switch box 8 is respectively provided with a slider and a slider fixing block 13 . The slider is slidably disposed in the slider fixing block 13 , and the button 28 is interlocked with the switch of the electromagnetic coil 23 to pass through the electromagnet iron in the electromagnetic coil 23 . The core 27 is connected between the button 28 and the transmission rod 26, and the front contact terminal 16 and the rear contact terminal 17 are respectively inserted into the open slots of the switch box 8, and the slider is respectively provided with the front contact terminal 16 and The movable contact 18, the front contact terminal 16 and the rear contact terminal 17 which are in contact with the rear contact terminal 17 are respectively provided with a static contact 15 and a terminal screw, and one end of the push rod 11 faces the slider.

Further preferably, a coil holder 22 is further disposed in the cavity, the electromagnetic coil 23 is wound around the coil holder 22, the electromagnetic coil 23 is provided with a copper sleeve, and the other end of the copper sleeve is inserted into the electromagnetic coil by the positioning ring groove 24. 23, the card is fixed to be fixed, and the button 28 is provided with a protective cover 4, and one end of the protective cover 4 is caught in the base 1 by a snap ring.

In the present invention, the base 1, the switch box 8, the stopper rod 9, the slider fixing block 13, the push rod 11, the button 28 and the upper cover 2 are preferably made of plastic material.

Further preferably, the middle of the switch box 8 is provided with a stop lever 9, a stop lever 9 and a push rod 11 vertical, the slider is provided with a through hole adapted to the stop rod 9. The stop lever 9 brakes the slider when it is emergency.

Further preferably, the lead wire of the electromagnetic coil 23 is built in the bottom of the base 1, and is connected to the coil power supply terminal 7 through the bottom gap of the switch box 8, and a crimping plate 6 for pressing the wire is further disposed in the cavity, and the coil power supply terminal 7 is provided. A wiring screw is mounted on it.

Further preferably, the switch box 8 is respectively provided with a front end compression spring 21 and a rear end compression spring 20, and the front end compression spring 21 and the rear end compression spring 20 are coaxially disposed, and the front end compression spring 21 is disposed respectively with the front contact terminal 16 and Between the two movable contacts 18 that the rear contact terminal 17 contacts, the rear end compression spring 20 is disposed between one of the movable contacts 18 and the inner wall of the switch case 8.

Further preferably, the switch box 8 is provided with a coupling plate 19 that can change the opening and closing of the static contact 15 , and the coupling plate 19 is slidably disposed between the rear end compression spring 20 and the movable contact 18 . Changing the position of the link plate 19 in the switch box 8 can change the on and off of the corresponding contacts. The upper cover 2 is provided with a groove for mounting a sealing ring, and the sealing ring and the protective cover 4 are made of rubber.

According to the invention, when the device is faulty or needs to disconnect the circuit, the external force touches the button, and the electromagnet core is displaced to the internal push rod to disconnect the built-in switch contact. When the reset is required, the external power supply electromagnetic coil is The electromagnet core bounces under the force of the magnetic field to cause the contact to close, so as to realize the automatic reset function, instead of manual mechanical reset, the operation is more convenient, safe, flexible and more applicable.

The present invention is not limited to the above-described preferred embodiments, and any person should be aware of the structural changes made in the light of the present invention. Any technical solutions having the same or similar to the present invention fall within the scope of the present invention. .

Claims

The electromagnetic automatic reset stroke switch comprises a base and an upper cover fastened thereon, the base and the upper cover form a hollow cavity, wherein the cavity has a switch box built therein, the switch A transmission rod is disposed on the box, and one end of the transmission rod is connected to the push rod, and the other end of the transmission rod is connected to a button disposed on the base, and the switch box is respectively provided with a slider And a slider fixing block, the slider is slidably disposed in the slider fixing block, the button is linked with the switch of the electromagnetic coil, and the electromagnet core penetrating in the electromagnetic coil is connected to the button and Between the transmission rods, a front contact terminal and a rear contact terminal are respectively disposed in the switch box, and the sliders are respectively provided with movable contacts that can be in contact with the front contact terminal and the rear contact terminal a head, one end of the push rod is opposite the slider.
The electromagnetic automatic reset stroke switch according to claim 1, wherein a coil holder is further disposed in the cavity, the electromagnetic coil is wound on the coil holder, and the electromagnetic coil is disposed inside. There is a copper sleeve, and the other end of the copper sleeve is inserted into the electromagnetic coil by a positioning ring groove.
The electromagnetic automatic reset stroke switch according to claim 1, wherein the button is provided with a protective sleeve, and one end of the protective sleeve is caught in the base.
The electromagnetic automatic reset stroke switch according to claim 1, wherein a central portion of the switch box is provided with a stopper rod, the stopper rod is perpendicular to the push rod, and the slider is provided with a through hole adapted to the stop rod.
The electromagnetic automatic reset stroke switch according to claim 1, wherein a wire is connected to the electromagnetic coil, and the other end of the wire is welded to a coil power supply terminal in the base, and the coil is powered. A terminal screw is mounted on the terminal.
The electromagnetic automatic reset stroke switch according to claim 1, wherein the front contact terminal and the rear contact terminal are respectively provided with a static contact and a terminal screw.
The electromagnetic automatic reset stroke switch according to claim 6, wherein the switch box is respectively provided with a front end compression spring and a rear end compression spring, and the front end compression spring and the rear end compression spring are coaxially arranged. The front end compression spring is disposed to be respectively connected to the front contact terminal and the rear contact terminal Between the two movable contacts that are touched, the rear end compression spring is disposed between one of the movable contacts and an inner wall of the switch case.
The electromagnetic automatic reset stroke switch according to claim 3, wherein the upper cover is provided with a groove for mounting a sealing ring, and the sealing ring and the protective cover are both made of rubber material.