CN219553526U

CN219553526U - Buffer structure for alternating current contactor

Info

Publication number: CN219553526U
Application number: CN202320409126.9U
Authority: CN
Inventors: 张忠利; 金鑫
Original assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Current assignee: Hangzhou Zhijiang Switchgear Stock Co Ltd
Priority date: 2023-03-07
Filing date: 2023-03-07
Publication date: 2023-08-18
Anticipated expiration: 2033-03-07

Abstract

The utility model discloses a buffer structure for an alternating current contactor, which comprises a contactor base for mounting devices, wherein a return contact for triggering a control switch is arranged at the upper end of the contactor base, an upper iron core for driving the return contact is arranged at the lower end of the return contact, a lower iron core for being matched with the upper iron core for use is arranged below the upper iron core, an absorption coil for enabling the lower iron core to absorb the upper iron core is arranged outside the lower iron core in a surrounding manner, and a buffer device for protecting the lower iron core is arranged on the lower iron core. The utility model solves the problems that the traditional contactor in the prior art can generate noise and is easy to damage during working. The utility model has the advantages of long service life, low noise, simple structure, convenient operation and the like.

Description

Buffer structure for alternating current contactor

Technical Field

The present utility model relates to the field of ac contactor structures, and more particularly, to a buffer structure for an ac contactor.

Background

At present, an electromagnetic assembly structure of an alternating current contactor and the alternating current contactor are disclosed on the Chinese patent net, and publication number CN202796754U is provided, wherein the electromagnetic assembly structure of the alternating current contactor comprises a control module of the alternating current contactor, a double-coil winding and a coil framework for fixing the double-coil winding, the coil framework is provided with a power supply lug at the upper end of an armature of the double-coil winding attraction alternating current contactor, and a winding lug is arranged at the opposite lower end of the upper end of the coil framework; one end of the power connection lug is coupled to the control module, and the other end of the power connection lug is connected to the power input end; one end of the winding lug is coupled with the control module, and the other end of the winding lug is connected with the double-coil winding. Because couple to control module with the power input through the power lug to through the double-coil winding of winding lug coupling, make things convenient for the wiring to improve assembly efficiency, simultaneously, power lug and winding lug set up in coil skeleton's upper and lower both ends, and compact structure separates input and output simultaneously, thereby has reduced the risk that the wrong line of wiring leads to the short circuit.

The AC contactor consists of base, return contact, electromagnetic system, casing and other necessary auxiliary parts, and may be used in three-phase AC power system for remote connection and disconnection and frequent starting and control of AC motor. The ac contactor is an electric element which is frequently operated, and has long service life and fast operating frequency, so that the contactor needs to have a better buffer design to prolong the service life.

In the above-mentioned contactor actuation in-process, upper and lower iron core bumps, produces the impact force, and this impact force not only causes the damage to iron core itself, especially the short circuit ring of lower iron core breaks because of the impact force in frequent operation in-process, has shortened the life-span of product greatly, and the iron core bumps in addition and also produces the noise, causes the influence to the environment.

Disclosure of Invention

The utility model provides a buffer structure for an alternating current contactor, which aims to solve the problems that the traditional contactor in the prior art can generate noise and is easy to damage during working.

The utility model relates to a buffer structure for an alternating current contactor, which comprises a contactor base for mounting devices, wherein a return contact for triggering a control switch is arranged at the upper end of the contactor base, an upper iron core for driving the return contact is arranged at the lower end of the return contact, a lower iron core for being matched with the upper iron core for use is arranged below the upper iron core, an absorption coil for enabling the lower iron core to absorb the upper iron core is arranged outside the lower iron core, and a buffer device for protecting the lower iron core is arranged on the lower iron core.

Preferably, the buffer device comprises a positioning piece for elastically fixing the lower iron core, and the positioning piece is elastically connected with the framework of the suction coil in a return mode.

Preferably, the left end and the right end of the positioning piece are respectively sleeved with a buffer spring elastically connected with the framework of the suction coil, and the positioning piece positioned between the two buffer springs is fixedly clamped with the lower iron core through a clamping groove on the lower iron core.

Preferably, a buffer sheet matched with the buffer spring is arranged on the contactor base below the lower iron core, and a buffer gap for protecting the lower iron core is arranged between the buffer sheet and the lower iron core.

Preferably, the upper end of the upper iron core is welded with the return contact, a main spring for resetting the return contact is sleeved on the periphery of the upper iron core, and the front end of the main spring is welded with the return contacts positioned on the left side and the right side of the upper iron core.

Preferably, at least 4 auxiliary springs which are uniformly distributed and matched with the main springs are embedded on the return contact.

Preferably, at least 4 spring mounting positions for mounting the auxiliary springs are arranged at the front end of the contactor base below the return contact.

Preferably, a limit chute for enabling the upper iron core to elastically return to move is formed in the contactor base below the upper iron core.

When the utility model works, the utility model is firstly arranged in a required working circuit, then the attraction coil is electrified, a magnetic field is generated after the attraction coil is electrified to attract the upper iron core, the attracted upper iron core is close to the lower iron core along the limit sliding groove, the upper iron core can drive the return contact to move in the moving process, when the upper iron core and the lower iron core are attracted, the return contact closes the control switch of the circuit, the coil is electrified for a long time, the upper iron core and the lower iron core are kept in the attraction state, and the circuit works normally.

When the circuit is broken, the coil is powered off, the suction force between the upper iron core and the lower iron core disappears, the return contact is reset under the action of the main spring and the spring, the control switch of the circuit is disconnected by the return contact, the upper iron core and the lower iron core are separated in the reset process of the return contact and return to the initial positions respectively, and the circuit stops working.

The lower iron core is elastically fixed with the coil framework by the positioning piece and the buffer spring, and impact force generated at the moment of the attraction of the upper iron core and the lower iron core is absorbed by the buffer spring and the buffer sheet below the lower iron core, so that noise generated when the upper iron core collides with the lower iron core is reduced. Because the lower iron core is elastically fixed, the lower iron core can move slightly in the buffer gap when the iron core is absorbed, so that the buffer performance of the utility model is greatly optimized, and the service life of the utility model is prolonged.

The utility model has the following beneficial effects: long service life, low noise, simple structure and convenient operation.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic structural view of the upper and lower cores of the present utility model when they are attracted.

Fig. 3 is a schematic structural view of a buffer gap according to the present utility model.

The contactor comprises a contactor base 1, a return contact 2, an upper iron core 3, a lower iron core 4, an attracting coil 5, a buffer sheet 6, a main spring 7, a secondary spring 8, a positioning piece 9 and a buffer spring 10.

Detailed Description

The technical scheme of the utility model is further specifically described through embodiments and with reference to the accompanying drawings.

Examples: the utility model is further described according to fig. 1, 2 and 3, the buffer structure for an ac contactor of the present example includes a contactor base 1 for mounting a device, a return contact 2 for triggering a control switch is provided at the upper end of the contactor base 1, an upper iron core 3 for driving the return contact 2 is provided at the lower end of the return contact 2, a lower iron core 4 for cooperating with the upper iron core 3 is provided below the upper iron core 3, an engaging coil 5 for engaging the upper iron core 3 with the lower iron core 4 is wound around the periphery of the lower iron core 4, and a buffer device for protecting the lower iron core 4 is provided on the lower iron core 4.

The buffering device comprises a positioning piece for elastically fixing the lower iron core 4, and the positioning piece is elastically connected with the framework of the suction coil 5 in a return mode.

The left end and the right end of the positioning piece 9 are respectively sleeved with a buffer spring 10 which is elastically connected with the framework of the suction coil 5, and the positioning piece 9 positioned between the two buffer springs 10 is fixedly clamped with the lower iron core 4 through a clamping groove on the lower iron core 4.

The contactor base 1 positioned below the lower iron core 4 is provided with a buffer sheet 6 matched with the buffer spring 10, and a buffer gap for protecting the lower iron core 4 is arranged between the buffer sheet 6 and the lower iron core 4.

The upper end of the upper iron core 3 is welded with the return contact 2, a main spring 7 for resetting the return contact 2 is sleeved on the periphery of the upper iron core 3, and the front end of the main spring 7 is welded with the return contacts 2 positioned on the left side and the right side of the upper iron core 3.

At least 4 auxiliary springs 8 which are uniformly distributed and matched with the main spring 7 are embedded on the return contact 2.

At least 4 spring mounting positions for mounting the auxiliary springs 8 are arranged at the front end of the contactor base 1 below the return contact 2.

A limit chute for allowing the upper iron core 3 to elastically return to move is arranged on the contactor base 1 below the upper iron core 3.

The above embodiments are merely examples of the present utility model, but the present utility model is not limited thereto, and any changes or modifications made by those skilled in the art are included in the scope of the present utility model.

Claims

1. The utility model provides a buffer structure for AC contactor, includes contactor base (1) that are used for installing the device, contactor base (1) upper end be equipped with return contact (2) that are used for triggering control switch, characterized by, return contact (2) lower extreme be equipped with last iron core (3) that are used for driving return contact (2), last iron core (3) below be equipped with be used for with last iron core (3) cooperation use lower iron core (4), lower iron core (4) peripheral around being equipped with be used for the attraction to go up iron core (3) and lower iron core (4) contact's actuation coil (5), lower iron core (4) on be equipped with the buffer that is used for protecting lower iron core (4).

2. The buffer structure for the alternating current contactor according to claim 1, wherein the buffer device comprises a positioning piece (9) for elastically fixing the lower iron core (4), and the positioning piece (9) is elastically connected with the framework of the attraction coil (5) in a return mode.

3. The buffer structure for the alternating current contactor according to claim 2, wherein the left end and the right end of the positioning piece (9) are respectively sleeved with buffer springs (10) which are elastically connected with the framework of the suction coil (5), and the positioning piece (9) positioned between the two buffer springs (10) is fixedly clamped with the lower iron core (4) through a clamping groove on the lower iron core (4).

4. A buffer structure for an ac contactor according to claim 3, characterized in that a buffer sheet (6) for cooperating with a buffer spring (10) is provided on the contactor base (1) below the lower iron core (4), and a buffer gap for protecting the lower iron core (4) is provided between the buffer sheet (6) and the lower iron core (4).

5. The buffer structure for the alternating current contactor according to claim 1, wherein the upper end of the upper iron core (3) is welded with the return contact (2), a main spring (7) for resetting the return contact (2) is sleeved on the periphery of the upper iron core (3), and the front end of the main spring (7) is welded with the return contacts (2) positioned on the left side and the right side of the upper iron core (3).

6. The buffer structure for the alternating current contactor according to claim 5, wherein at least 4 auxiliary springs (8) which are uniformly distributed and matched with the main springs (7) are embedded on the return contact (2).

7. A buffer structure for an ac contactor according to claim 6, characterized in that the front end of the contactor base (1) below the return contact (2) is provided with at least 4 spring mounting locations for mounting the secondary springs (8).

8. The buffer structure for the alternating current contactor according to claim 1, wherein a limit chute for elastically returning the upper iron core (3) is formed on the contactor base (1) positioned below the upper iron core (3).