CN211529878U

CN211529878U - Moving contact assembly for DC contactor

Info

Publication number: CN211529878U
Application number: CN202020576442.1U
Authority: CN
Inventors: 曾祥明; 王钱军; 徐渭贞
Original assignee: Suzhou Anlaiqiang Electronic Technology Co ltd
Current assignee: Suzhou Anlaiqiang Electronic Technology Co ltd
Priority date: 2020-04-17
Filing date: 2020-04-17
Publication date: 2020-09-18
Anticipated expiration: 2030-04-17

Abstract

The utility model discloses a moving contact assembly for a direct current contactor, which comprises a push rod, a gasket, a spring and a moving contact, wherein the top of the push rod is fixedly sleeved with an upper limiting piece and the middle part of the push rod is fixedly sleeved with a lower supporting piece, and the upper side surface of the lower supporting piece, namely the supporting surface, is provided with a pair of locking bulges which are symmetrical relative to the axis of the push rod; the center of the gasket is provided with a central slotted hole and two side edges are symmetrically provided with side limiting slotted holes; the center of moving contact is equipped with the mounting hole, and moving contact, spring and gasket are installed in proper order between the last spacing piece of push rod and under bracing face, form reliable stable connection. This moving contact subassembly for direct current contactor is through setting up spacing piece and under bracing piece on the push rod, with moving contact, spring and gasket installation wherein, reduced part quantity, improved the precision of assembly efficiency and product, also improved the security and the reliability of product simultaneously.

Description

Moving contact assembly for DC contactor

Technical Field

The utility model relates to a moving contact subassembly especially relates to a moving contact subassembly for direct current contactor.

Background

The moving contact component of the common direct current contactor in the market is usually processed by adopting a conductive and non-conductive stainless steel bar material, and some manufacturers limit the moving contact and the spring by adopting an upper gasket, a lower gasket, an upper shaft sleeve and a lower shaft sleeve and additionally arranging snap springs so as to form the moving contact component; some manufacturers omit that the upper shaft sleeve and the lower shaft sleeve and the clamp spring are fixed by welding or riveting the top, so that the number of parts is reduced, the insulation between the main loop and the control loop is reduced, potential safety hazards are formed, the processing difficulty is increased, the precision is difficult to guarantee, and the production efficiency is not high.

Disclosure of Invention

In order to overcome the defects, the utility model provides a moving contact subassembly for direct current contactor has not only reduced part quantity, has improved the precision of assembly efficiency and product, has also improved the security and the reliability of product moreover.

The utility model discloses a solve the technical scheme that its technical problem adopted and be: a moving contact component for a direct current contactor comprises a push rod, a gasket, a spring and a moving contact, wherein the top of the push rod is fixedly sleeved with an upper limiting piece, the middle of the push rod is fixedly sleeved with a lower supporting piece, and a pair of locking bulges which are symmetrical relative to the axis of the push rod is arranged on the upper side surface of the lower supporting piece, namely the supporting surface; the center of the gasket is provided with a central slotted hole which is consistent with the appearance of the lower supporting piece, two side edges of the central slotted hole in the width direction are symmetrically provided with side limiting slotted holes for accommodating the locking bulges, and the two side limiting slotted holes and the central slotted hole are connected into a whole; the center of the moving contact is provided with a mounting hole which is consistent with the shape of the lower supporting piece, the moving contact penetrates through the lower supporting piece of the push rod through the mounting hole and is sleeved at the upper end of the push rod, and the upper side surface of the moving contact is abutted against the upper limiting piece of the push rod; the spring penetrates through the lower support piece of the push rod through the central through hole of the spring and is sleeved at the upper end of the push rod, and the upper end face of the spring is elastically abutted against the lower side face of the moving contact; the gasket penetrates through the lower support piece of the push rod through the central slotted hole to be sleeved at the upper end of the push rod, and is clamped between the spring and the lower support piece in a 90-degree rotating mode, and the two locking protrusions on the support piece are respectively clamped in the two side limiting slotted holes of the gasket.

As a further improvement of the present invention, the upper side surface of the upper stopper has an edge to the end of the upper end of the push rod, and a plurality of reinforcing ribs are provided between the ends of the upper end of the push rod.

As a further improvement of the utility model, the upper limiting piece is circular, and the lower supporting piece is square.

As a further improvement of the utility model, the diameter of the upper limiting piece is larger than the length of the lower supporting piece.

As a further improvement of the present invention, the push rod is located the diameter of the lower support member lower portion is smaller than that of the lower support member upper portion.

As a further improvement of the utility model, the gasket is a circular gasket, and the outer edge of this circular gasket is turned over outwards and is formed the turn-ups.

As a further improvement of the present invention, the inner diameter of the spring, the outer diameter of the spring is smaller than the distance from the center of the gasket to the flange thereof.

As a further improvement of the utility model, the gasket is made of stainless steel.

As a further improvement, a transition arc-shaped groove is arranged between the two side limiting groove holes and the central groove hole of the gasket.

As a further improvement, the push rod top and the upper limiting piece and the lower supporting piece are made of plastic materials.

The utility model has the advantages that: this moving contact subassembly for direct current contactor is through setting up spacing piece and under bracing piece on the push rod, with moving contact, spring and gasket installation wherein, reduced part quantity, improved the precision of assembly efficiency and product, also improved the security and the reliability of product simultaneously.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the structure of the push rod of the present invention;

FIG. 3 is a schematic view of the gasket structure of the present invention;

fig. 4 is a schematic view of the assembly state of the spring and the push rod of the present invention;

fig. 5 is a schematic view of the assembled state of the spring and the gasket according to the present invention;

fig. 6 is a schematic structural view of the moving contact according to the present invention;

FIG. 7 is a schematic view of the state of the assembly step 1 of the present invention;

fig. 8 is a schematic view of the state of the assembly step 2 of the present invention;

fig. 9 is a first state diagram of the assembly step 3 of the present invention;

fig. 10 is a schematic view of the state of the assembly step 3 of the present invention.

The following description is made with reference to the accompanying drawings:

1-push rod; 2-a gasket;

3-a spring; 4-moving contact;

11-upper stop; 12-lower support;

121-support surface; 122-locking projection;

13-reinforcing ribs; 21-central slot;

22-side limiting slot; 23-flanging;

24-arc-shaped groove; 4-mounting hole;

111-limiting surface; 41-mounting hole.

Detailed Description

The following description of the preferred embodiments of the present invention will be made in conjunction with the accompanying drawings.

Referring to fig. 1, in order to the present invention, a moving contact assembly for a dc contactor includes a push rod 1, a gasket 2, a spring 3 and a moving contact 4.

Referring to fig. 2, the top of the push rod 1 is fixedly sleeved with a circular upper stopper 11 and the middle thereof is fixedly sleeved with a square lower stopper 12 to mount the movable contact 4, the spring 3 and the gasket 2 therein. A plurality of reinforcing ribs 13 are arranged between the edge of the upper side surface of the upper limiting piece 11 and the end part of the upper end of the push rod 1, and a pair of locking bulges 122 which are symmetrical relative to the push rod axis are arranged on the upper side surface of the lower supporting piece 12, namely a supporting surface 121.

The top of the push rod 1 has the function of reliably limiting the moving contact, in the frequent action process of the contact piece, the impact on the lower side surface, namely the limiting surface 111, of the upper limiting part 11 at the top of the push rod and the impact on the upper side surface, namely the supporting surface 121, of the lower supporting part 12 are the most, so that enough supporting strength is needed, the reinforcing ribs 13 uniformly distributed at the top of the push rod provide enough strength for the limiting surface at the top, the locking protrusions at the bottom provide enough strength for the supporting surface, and the function and the reliability of the moving contact assembly of the contactor in the whole life cycle are ensured.

The diameter of the limiting circular surface of the limiting part 11 on the top of the push rod 1 is larger than that of the supporting surface of the bottom supporting part 12, the moving contact can be reliably limited at the axial position, the diameter of the middle cylinder of the push rod is slightly smaller than that of the middle of the moving contact, and the moving contact is guaranteed to move smoothly in the axial direction.

Referring to fig. 3, the gasket 2 is a circular gasket, the outer edge of the circular gasket is turned outwards to form a flange 23, the center of the gasket 2 is provided with a central slot 21, i.e. a square slot, which is consistent with the shape of the lower supporting member 12, two sides of the central slot in the width direction are symmetrically provided with side limiting slots 22 for accommodating the locking protrusions 122, and the two side limiting slots 22 are connected with the central slot 21 into a whole; a transitional arc-shaped groove 24 is arranged between the two side limiting groove holes 22 and the central groove hole 21 of the gasket 2. The slotted hole in the middle of this gasket 2 cooperates with the corresponding structure of push rod and can be limited when preventing frequent action, and the gasket drops because of rotating and leads to the inefficacy risk of product. The flanging of the outer edge of the gasket not only increases the strength of the gasket and is not easy to deform, but also can limit the spring position to be always kept at the middle position without inclination, so that the spring force is uniform. The gasket 2 is made of stainless steel materials, is not magnetic, and cannot influence the action characteristics of the product.

Referring to fig. 4, the inner diameter of the spring is in clearance fit with the outer circle of the bottom of the push rod, so that the spring is convenient to install. Referring to fig. 5, the outer diameter of the spring is in clearance fit with the inner diameter of the flange of the gasket, so that the spring is convenient to install and certain limit is guaranteed.

Referring to fig. 6, the center of the moving contact is provided with a mounting hole 41 with the same shape as the lower support 12 of the push rod, and the mounting hole is in clearance fit with the push rod, so that the moving contact is convenient to mount and can be ensured to move smoothly in the axial direction.

In addition, the top of the push rod, the upper limiting piece and the lower supporting piece are made of plastic materials, the bottom of the push rod is made of metal materials, and the bottom of the push rod can be embedded into the top of the push rod, so that the manufacturing cost is reduced.

The assembly steps of the moving contact component for the direct current contactor are as follows:

step 1, firstly, a moving contact 4 is installed on a push rod 1, the moving contact 4 penetrates through a bottom plate of the push rod 1 through an installation hole 41, namely penetrates through a lower supporting piece 12 and is sleeved at the upper end of the push rod 1, and the upper side surface of the moving contact is abutted against a limiting surface 111 of an upper limiting piece 11 of the push rod, which is shown in fig. 7;

step 2, the spring 3 is installed, and is also installed from the bottom plate of the push rod, namely the spring 3 penetrates through the lower support 12 of the push rod through the central through hole to be sleeved into the upper end of the push rod 1, and the upper end face of the spring 3 is elastically abutted against the lower side face of the movable contact 4, see fig. 8;

and step 3, installing the gasket 2, enabling the gasket 2 to penetrate through the lower supporting piece 12 of the push rod through the central slotted hole 21 to be sleeved into the upper end of the push rod 1, and rotating for 90 degrees to be fixedly clamped between the spring 3 and the lower supporting piece 12, and enabling the two locking protrusions 122 on the supporting piece 12 to be respectively clamped in the two side limiting slotted holes 22 of the gasket 2, and referring to fig. 9-10, so that installation is completed, and the movable contact component for the direct current contact is obtained, and referring to fig. 1.

Therefore, the moving contact component for the direct current contactor has the advantages that the upper limiting piece and the lower supporting piece are arranged on the push rod, the moving contact, the spring and the gasket are installed in the moving contact component, the number of parts is reduced, the assembling efficiency and the product precision are improved, and meanwhile, the product safety and reliability are also improved.

In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the invention. The foregoing description is only illustrative of the preferred embodiments of the invention, which can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. All the contents that do not depart from the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention all still belong to the protection scope of the technical solution of the present invention.

Claims

1. A kind of direct current contactor uses the moving contact assembly, characterized by that: the device comprises a push rod (1), a gasket (2), a spring (3) and a moving contact (4), wherein the top of the push rod (1) is fixedly sleeved with an upper limiting piece (11) and the middle of the push rod is fixedly sleeved with a lower supporting piece (12), and a pair of locking bulges (122) which are symmetrical relative to the axial line of the push rod are arranged on the upper side surface of the lower supporting piece, namely a supporting surface (121); a central slotted hole (21) which is consistent with the shape of the lower support piece (12) is formed in the center of the gasket (2), side limiting slotted holes (22) for accommodating the locking protrusions (122) are symmetrically formed in two side edges of the central slotted hole in the width direction, and the two side limiting slotted holes (22) are connected with the central slotted hole (21) into a whole; the center of the moving contact (4) is provided with a mounting hole (41) which is consistent with the shape of the lower support piece (12), the moving contact (4) penetrates through the lower support piece (12) of the push rod through the mounting hole (41) to be sleeved into the upper end of the push rod (1), and the upper side surface of the moving contact is abutted against the upper limiting piece (11) of the push rod; the spring (3) penetrates through a lower support piece (12) of the push rod through a central through hole to be sleeved into the upper end of the push rod (1), and the upper end face of the spring (3) is elastically abutted against the lower side face of the movable contact (4); the gasket (2) penetrates through a lower supporting piece (12) of the push rod through the central slotted hole (21) to be sleeved at the upper end of the push rod (1), and is clamped between the spring (3) and the lower supporting piece (12) in a rotating mode by 90 degrees, and two locking protrusions (122) on the supporting piece (12) are respectively clamped in two side limiting slotted holes (22) of the gasket (2).

2. A movable contact assembly for a dc contactor as claimed in claim 1 wherein: a plurality of reinforcing ribs (13) are arranged between the edge of the upper side surface of the upper limiting piece (11) and the end part of the upper end of the push rod (1).

3. A movable contact assembly for a dc contactor as claimed in claim 2, wherein: the upper limiting piece (11) is circular, and the lower supporting piece (12) is square.

4. A movable contact assembly for a dc contactor as claimed in claim 3, wherein: the diameter of the upper limiting piece (11) is larger than the length of the lower supporting piece (12).

5. A movable contact assembly for a dc contactor as claimed in claim 1 wherein: the diameter of the push rod at the lower part of the lower support is smaller than that of the push rod at the upper part of the lower support.

6. A movable contact assembly for a dc contactor as claimed in claim 1 wherein: the gasket (2) is a circular gasket, and the outer edge of the circular gasket is turned outwards to form a flanging (23).

7. A movable contact assembly for a DC contactor as claimed in claim 6, wherein: the inner diameter of the spring is smaller than the distance between the center of the gasket and the flanging of the gasket.

8. A movable contact assembly for a DC contactor as claimed in claim 6, wherein: the gasket (2) is made of stainless steel.

9. A movable contact assembly for a DC contactor as claimed in claim 6, wherein: a transition arc-shaped groove (24) is arranged between the two side limiting groove holes (22) and the central groove hole (21) of the gasket.

10. A movable contact assembly for a dc contactor as claimed in claim 1 wherein: the top of the push rod, the upper limiting piece and the lower supporting piece are made of plastic materials.