CN213150681U - Contact piece protection type positioning contactor - Google Patents

Abstract

The invention discloses a contact piece protection type positioning contactor, which consists of an electromagnetic component, a load component and a shell component, wherein a baffle (13) is arranged in a base (1) of the shell component and between a magnetic conduction fixing plate (9) of the electromagnetic component and a bent contact bridge (5) and an upper contact piece (6) of the load component, and the baffle (13) is provided with a raised column (26) and is adjacent to one end of a middle contact bridge (17) of the load component. The baffle and the raised columns thereof enable the middle contact bridge to act stably and contact well, so that the problems of contact point misalignment and contact ablation are improved to the greatest extent. The contactor (relay) provided by the invention has the advantages that the contact work is stable and reliable, the quality of the contactor product is improved, the service life of the contactor is prolonged, and the applied electric appliance is effectively protected.

Description

Contact piece protection type positioning contactor

Technical Field

The present invention relates to a contactor for commutating or on-off controlling a current.

Background

A contactor (belonging to a relay) is an electric appliance product equipped for controlling power supply to a line, commutation or on-off control of current, and is widely used in home appliances and industrial products. In recent years, with the development of electric vehicles (e.g., hybrid, fuel cell, etc.), contactors are being used as power switches thereof.

Contactors are generally comprised of an electromagnetic member, a load member, and a housing member, wherein: the electromagnetic component comprises a movable iron core, a static iron core, a coil (enameled wire), a coil rack, a magnetic conduction fixed plate, a magnetic conduction rack and the like, the shell component comprises an upper cover shell and a base, the load component comprises an upper contact piece, a lower contact piece, a contact bridge (comprising a middle contact bridge and a bent contact bridge), a top column, an over travel spring and the like, in the working process of the contactor, the middle contact bridge can do ascending (or descending), rotating and swinging actions, so that the contacts at the two ends of the middle contact bridge are respectively contacted with the upper contact piece (or the lower contact piece) and the bent contact bridge to work, but the rotation and swing amplitude of the middle contact bridge is large, so that the contact points between the middle contact bridge are difficult to align accurately and have poor contact, ablation (or spark) may occur, which affects the normal operation of the contactor, shortens the service life thereof, and produces adverse effects on the electric appliances to which it is applied.

Disclosure of Invention

The invention aims to overcome the defects and provide a contact piece protection type positioning contactor which can ensure that an intermediate contact bridge has good contact and stably operates.

The purpose of the invention is realized by the following technical scheme: the contact piece protection type positioning contactor is formed from electromagnetic component, load component and shell component, in which the electromagnetic component includes moving iron core, coil frame and magnetic conductive fixing plate, the shell component includes upper cover shell and base seat, the load component includes curved contact bridge, upper contact piece, lower contact piece and intermediate contact bridge, in the intermediate contact bridge interior a top column, over-travel spring and return spring are mounted, in the described base seat and between the magnetic conductive fixing plate and curved contact bridge and upper contact piece a baffle plate is mounted, and on the baffle plate a raised column is set, and is adjacent to one end of intermediate contact bridge.

And the outer ends of the bent contact bridge, the upper contact piece and the lower contact piece, which extend to the outside of the base, are provided with assembling fasteners of screws and nuts, and the positions, which are outside the base and are in contact with the nuts, are provided with nut seats.

After the invention is adopted, the arrangement of the baffle plate and the convex column thereof ensures that the middle contact bridge can lightly touch the convex column and has small swing amplitude in the lifting and rotating processes, thereby ensuring that the middle contact bridge has stable action and good contact, and improving the problems of non-alignment of contact points and ablation of the contact points to the greatest extent. And in the design that the contact pieces such as the bent contact bridge, the upper contact piece, the lower contact piece and the like are connected with the external equipment, the outer end of the contact piece and the wiring end of the external equipment are simultaneously fixed on a nut seat of a base of the contactor together by an external connection screw and a nut, so that the contact piece can be protected under any condition, the contact piece is not deformed, twisted and the like under the conditions of external force, heating and the like, and the failure of a contactor product is effectively prevented.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of a contact protection type positioning contactor according to the present invention.

Fig. 2 is a perspective view (external shape) of fig. 1.

Fig. 3 is a schematic structural view of the assembly among the magnetic conductive fixing plate, the baffle (and the protruding column), the bent contact bridge, the upper contact piece, the lower contact piece, the middle contact bridge, the top column, etc. in fig. 1.

Detailed Description

Referring to fig. 1, 2 and 3, the contact piece protection type positioning contactor of the present invention comprises an electromagnetic component (also called electromagnetic assembly), a load component and a housing component, wherein the electromagnetic component comprises a movable iron core 11, a coil 16, a coil rack 12, a magnetic conduction fixed plate 9 (and a magnetic conduction rack 10), the shell component comprises an upper cover shell 2 and a base 1, the load component comprises a bent contact bridge 5 (two pieces in left and right), an upper contact piece 6, a lower contact piece 7 and a middle contact bridge 17 (two pieces in left and right), the middle contact bridge 17 is sleeved with a top column 18, an overtravel spring 19 (at the upper position and a snap spring 21) and a return spring 8 (at the lower position), a baffle 13 is arranged in the base 1 and between the magnetic conduction fixing plate 9 and the bent contact bridge 5 and the upper contact piece 6, the shield 13 has a raised post 26 thereon adjacent one end of (one of) the intermediate contact bridge 17 (as shown in figure 3).

As shown in fig. 1 and 2, the outer ends of the bent contact bridge 5, the upper contact piece 6, and the lower contact piece 7 extending to the outside of the base are respectively provided with an assembly fastener of a screw 23 and a nut 24, and a nut seat 25 (four corresponding pieces, the nut seat 25 and the base 1 are of an integral structure) is provided outside the base 1 and in contact with the nut 24. This contactor is through the assembly fastener of its curved contact bridge 5, upper contact piece 6, the screw 23 on the outer end of extension to the base outside of lower contact piece 7 and nut 24 for can contact firmly, fix together on the nut seat 25 of contactor (relay) self base between the wiring terminal of the external equipment who is connected with it (all press from both sides between curved contact bridge, upper contact piece or the outer end of lower contact piece and nut), thereby make the contact piece (be the contact, contain curved contact bridge, upper contact piece, lower contact piece) protected.

Wherein the electromagnetic member is mounted in the upper cover casing 2 of the housing member, and the load member is mounted in the base 1 of the housing member; middle contact bridge 17 all contacts through the contact 20 at middle contact bridge both ends between respectively with curved contact bridge 5, upper contact piece 6, lower contact piece 7, the outer end of curved contact bridge 5, upper contact piece 6, lower contact piece 7 extends to the outside of base. The magnetic conduction fixing plate 9 and the baffle 13 are both provided with through holes 27 which can allow the top column to pass through and contact with the movable iron core.

Referring to the attached drawings, when the contactor (relay) works, a coil (enameled wire) winds a movable iron core to generate a magnetic field, the movable iron core rises (or falls) to drive a jack-prop of a load component to rise (or fall) by magnetic force, and two end contacts of a middle contact bridge on the right side of the contactor are contacted with a bent contact bridge and an upper contact piece (or two end contacts of the middle contact bridge on the left side of the contactor are contacted with the bent contact bridge and a lower contact piece); finally, the top column is lowered (or raised) and the movable iron core is also lowered (or raised) by the return of the return spring. The contactor (relay) is mainly applied to the circuit on-off of a direct-current power supply load. The arrangement of the baffle and the protruding columns thereof ensures that the lifting and rotating action of the middle contact bridge is stable and the contact is good, so that the middle contact bridge has stable action and good contact, and the problems of the misalignment of contact points and the ablation of the contact points are improved to the greatest extent.

Claims (2)

1. Contact protection type locate mode contactor comprises electromagnetism component, load component, the casing component, wherein the electromagnetism component is including moving iron core (11), coil (16), coil former (12), magnetic conduction fixed plate (9), the casing component includes upper cover shell (2), base (1), the load component includes curved contact bridge (5), last contact piece (6), lower contact piece (7), middle contact bridge (17), this middle contact bridge (17) endotheca is equipped with fore-set (18) and overtravel spring (19), return spring (8), its characterized in that: a baffle plate (13) is arranged in the base (1) and between the magnetic conduction fixing plate (9) and the bent contact bridge (5) and the upper contact piece (6), and a raised column (26) is arranged on the baffle plate (13) and is adjacent to one end of the middle contact bridge (17).

2. The wafer shield positioning contactor of claim 1, wherein: and the outer ends of the bent contact bridge (5), the upper contact piece (6) and the lower contact piece (7) extending to the outside of the base are respectively provided with an assembly fastener of a screw (23) and a nut (24), and a nut seat (25) is arranged at the position outside the base (1) and in contact with the nut (24).

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