Double-breakpoint contact

Abstract

The utility model relates to a double-breakpoint contact. The technical problem to be solved by the utility model is to provide a double-breakpoint contact. According to the technical scheme, the arc extinguishing contact comprises a contact main body, a square contact and an arc extinguishing seat, the contact main body comprises a contact rotating part, a contact first contact part and a contact second contact part, and the contact first contact part and the contact second contact part are arranged in a central symmetry mode. The first contact part and the second contact part are respectively provided with a contact welding boss, the middle part of the first contact part and the middle part of the second contact part are respectively provided with a contact arc extinguishing port, and the arc extinguishing seat is provided with an arc striking seat sleeving groove. The utility model has the advantages that the arc can be quickly led out through the middle connecting piece arc striking block, the damage time of the square contact, the first contact part of the contact and the second contact part of the contact is effectively shortened, and the led-out arc can be eliminated and reduced by the arc extinguishing seat, so that the service life of the contact is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breaker contacts, in particular to a double-breakpoint contact. Background Art

[0002] Double-breakpoint contact is a technology used in circuit breakers to achieve reliable disconnection. It involves the design of two breakpoints, which can each bear part of the electric repulsion force in the case of current overload or short circuit, thereby preventing the single moving contact from being subjected to excessive pressure and wear. Although the double-breakpoint contact improves the breaking capacity of the product, a large arc will still be generated on the side wall of the double-breakpoint contact when it contacts or separates from the static contact, and it is still not possible to reduce and suppress the arc at the starting end, which makes the service life of the double-breakpoint contact still not ideal, and improvements and optimizations are made to this end. Utility Model Content

[0003] In order to solve the above problems, the technical problem to be solved by the utility model is to provide a double breakpoint contact.

[0004] The technical solution adopted by the double-breakpoint contact of the utility model is characterized in that it includes a contact body, a square contact and an arc extinguishing seat, the contact body includes a contact rotating part and a first contact part and a second contact part of the contact respectively arranged at two ends of the contact rotating part, the first contact part of the contact and the second contact part of the contact are centrally symmetrically arranged, the first contact part of the contact and the second contact part of the contact are both provided with a contact welding boss for welding the square contact, the middle part of the first contact part of the contact and the middle part of the second contact part of the contact are both provided with a contact arc extinguishing port, the arc extinguishing seat is provided with a contact welding boss for the first contact part of the contact and the second contact part of the contact. The contact portion is inserted into an arc-striking seat sleeve groove, and the arc-striking seat is provided with an arc-striking seat middle piece for inserting into the contact arc-extinguishing port in the middle of the arc-striking seat sleeve groove, and the upper end of the arc-striking seat middle piece is provided with a middle piece receiving surface which is in the same horizontal plane as the contact welding boss and a middle piece arc-striking block corresponding to the square contact, and an arc-striking seat limiting protrusion is provided at the rear end of the arc-striking seat middle piece, and the contact rotating portion is provided with a contact limiting port which is communicated with the contact arc-extinguishing port and corresponds to the arc-striking seat limiting protrusion near the first contact portion of the contact and the second contact portion of the contact.

[0005] The first contact portion of the contact and the second contact portion of the contact are both provided with a first contact connection hole vertically connected to the arc extinguishing port of the contact, and the second contact connection hole is provided on the contact rotating portion;

[0006] The arc extinguishing seat is provided with a first arc extinguishing seat connecting hole, the arc extinguishing seat limiting protrusion is provided with a second arc extinguishing seat connecting hole, the first contact connecting hole and the first arc extinguishing seat connecting hole, the second contact connecting hole and the second arc extinguishing seat connecting hole are riveted together.

[0007] The arc extinguishing seat is provided with an arc extinguishing seat limiting rib outside the arc striking seat sleeve groove for limiting the square contact, the arc extinguishing seat limiting rib is higher than the middle joint piece receiving surface, and the arc extinguishing seat limiting rib is provided with an arc extinguishing seat rib yielding opening at the connection with the middle joint piece receiving surface for facilitating welding positioning.

[0008] The middle joint arc-starting block is provided with a middle joint arc-starting piece which is arranged perpendicularly to the middle joint receiving surface.

[0009] The thickness of the first contact portion of the contact is the same as the thickness of the second contact portion of the contact, and the thickness of the first contact portion of the contact is greater than the thickness of the rotating portion of the contact.

[0010] The arc extinguishing seat is made of plastic.

[0011] A waist-shaped shaft hole is arranged at the center of the contact rotating part.

[0012] The advantages of the double-breakpoint contact of the utility model are: the arc can be quickly led out through the arc-starting block of the middle contact piece, effectively shortening the damage time of the square contact, the first contact part of the contact and the second contact part of the contact; the arc can be eliminated and reduced by the arc extinguishing seat after being led out, thereby improving the service life of the contact; the structure of the arc extinguishing seat has a high protective effect on the first contact part and the second contact part of the contact, is easy to process and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is an exploded view of the double breakpoint contact of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the contact body of the utility model;

[0016] Figure 3 This is another structural schematic diagram of the contact body of the utility model;

[0017] Figure 4 This is a structural schematic diagram of the arc extinguishing seat of the utility model;

[0018] Figure 5 It is another structural schematic diagram of the arc extinguishing seat of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1-5As shown, the double-breakpoint contact involved in the utility model includes a contact body 1, a square contact 2 and an arc extinguishing seat 3, the contact body 1 includes a contact rotating part 5 and a first contact part 6 and a second contact part 7 respectively arranged at two ends of the contact rotating part 5, the first contact part 6 and the second contact part 7 are centrally symmetrically arranged, the first contact part 6 and the second contact part 7 are both provided with a contact welding boss 8 for welding the square contact 2, the middle part of the first contact part 6 and the middle part of the second contact part 7 are both provided with a contact arc extinguishing port 10, the arc extinguishing seat 3 is provided with an arc striking seat socket groove 11 for inserting the first contact part 6 and the second contact part 7, and the arc extinguishing seat 3 is provided with a socket groove 11 for inserting the contact extinguishing The arc extinguishing seat middle piece 12 in the arc opening 10, the upper end of the arc extinguishing seat middle piece 12 is provided with a middle piece receiving surface 13 which is in the same horizontal plane as the contact welding boss 8 and a middle piece arc-starting block 14 corresponding to the square contact 2, the rear end of the arc extinguishing seat middle piece 12 is provided with an arc extinguishing seat limiting protrusion 15, the contact rotating part 5 is provided with a contact limiting opening 16 which is connected with the contact arc extinguishing port 10 and corresponds to the arc extinguishing seat limiting protrusion 15 near the first contact part 6 of the contact and the second contact part 7 of the contact, when the square contact 2 contacts and generates an arc, the arc can be quickly led out through the middle piece arc-starting block 14, which effectively shortens the damage time of the square contact 2, the first contact part 6 of the contact and the second contact part 7 of the contact, and the arc can be eliminated and reduced by the arc extinguishing seat 3 after being led out, thereby improving the service life of the contact.

[0020] The first contact portion 6 and the second contact portion 7 of the contact are both provided with a first contact connecting hole 18 which is vertically connected to the contact arc extinguishing port 10, and the contact rotating portion 5 is provided with a second contact connecting hole 19; the arc extinguishing seat 3 is provided with a first arc extinguishing seat connecting hole 20, and the arc extinguishing seat limiting protrusion 15 is provided with a second arc extinguishing seat connecting hole 21, the first contact connecting hole 18 and the first arc extinguishing seat connecting hole 20, the second contact connecting hole 19 and the second arc extinguishing seat connecting hole 21 are all riveted together, and the double-hole riveting makes the connection tighter and more reliable and convenient for production operation.

[0021] The arc extinguishing seat 3 is provided with an arc extinguishing seat limiting rib 23 outside the arc striking seat sleeve groove 11 for limiting the square contact 2. The arc extinguishing seat limiting rib 23 is higher than the middle joint piece receiving surface 13. The arc extinguishing seat limiting rib 23 is provided with an arc extinguishing seat rib yielding opening 24 at the connection with the middle joint piece receiving surface 13 for easy welding positioning, which can delay the displacement caused by frequent impact and contact of the square contact 2 and improve the service life of the product.

[0022] The middle joint arc-starting block 14 is provided with a middle joint arc-starting piece 26 which is vertically arranged with respect to the middle joint receiving surface 13 , so that the arc-starting is more uniform and stable with less impact.

[0023] The thickness of the first contact portion 6 of the contact is the same as the thickness of the second contact portion 7 of the contact, and the thickness of the first contact portion 6 of the contact is greater than the thickness of the contact rotating portion 5 .

[0024] The arc extinguishing seat 3 is made of plastic.

[0025] A waist-shaped shaft hole 28 is provided at the center of the contact rotating portion 5 .

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A double breakpoint contact, characterized in that: The invention comprises a contact body (1), a square contact (2) and an arc extinguishing seat (3), wherein the contact body (1) comprises a contact rotating portion (5) and a first contact portion (6) and a second contact portion (7) respectively arranged at two ends of the contact rotating portion (5), the first contact portion (6) and the second contact portion (7) being centrally symmetrically arranged, the first contact portion (6) and the second contact portion (7) being both provided with a contact welding boss (8) for welding the square contact (2), the middle of the first contact portion (6) and the middle of the second contact portion (7) being both provided with a contact arc extinguishing port (10), and the arc extinguishing seat (3) being provided with a contact welding boss (8) for inserting the first contact portion (6) and the second contact portion (7) into the arc extinguishing seat (3). The arc extinguishing seat (3) is provided with an arc extinguishing seat middle connecting piece (12) in the middle of the arc extinguishing seat connecting piece (11) for being inserted into the contact arc extinguishing port (10); the upper end of the arc extinguishing seat middle connecting piece (12) is provided with a middle connecting piece receiving surface (13) which is in the same horizontal plane as the contact welding boss (8) and a middle connecting piece arc striking block (14) corresponding to the square contact (2); the rear end of the arc extinguishing seat middle connecting piece (12) is provided with an arc extinguishing seat limiting protrusion (15); and the contact rotating portion (5) is provided with a contact limiting opening (16) which is in communication with the contact arc extinguishing port (10) and corresponds to the arc extinguishing seat limiting protrusion (15) near the first contact portion (6) and the second contact portion (7) of the contact.

2. The double breakpoint contact according to claim 1, characterized in that: The first contact portion (6) and the second contact portion (7) of the contact are both provided with a first contact connection hole (18) vertically connected to the contact arc extinguishing port (10), and the contact rotating portion (5) is provided with a second contact connection hole (19); The arc extinguishing seat (3) is provided with an arc extinguishing seat first connection hole (20), the arc extinguishing seat limiting protrusion (15) is provided with an arc extinguishing seat second connection hole (21), the contact first connection hole (18) and the arc extinguishing seat first connection hole (20), the contact second connection hole (19) and the arc extinguishing seat second connection hole (21) are all riveted together.

3. The double breakpoint contact according to claim 1, characterized in that: The arc extinguishing seat (3) is provided with an arc extinguishing seat limiting rib (23) for limiting the position of the square contact (2) outside the arc striking seat sleeve groove (11); the arc extinguishing seat limiting rib (23) is higher than the middle connecting piece receiving surface (13); and the arc extinguishing seat limiting rib (23) is provided with an arc extinguishing seat rib yielding opening (24) at the connection point with the middle connecting piece receiving surface (13) for facilitating welding positioning.

4. The double breakpoint contact according to claim 1, characterized in that: The middle joint piece arc-starting block (14) is provided with a middle joint piece arc-starting piece (26) which is arranged perpendicularly to the middle joint piece receiving surface (13).

5. The double breakpoint contact according to claim 1, characterized in that: The thickness of the first contact portion (6) of the contact is the same as the thickness of the second contact portion (7) of the contact, and the thickness of the first contact portion (6) of the contact is greater than the thickness of the contact rotating portion (5).

6. The double breakpoint contact according to claim 1, characterized in that: The arc extinguishing seat (3) is made of plastic.

7. The double breakpoint contact according to claim 1, characterized in that: A waist-shaped shaft hole (28) is provided at the centre of the contact rotating portion (5).

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