Static contact assembly

Abstract

A static contact assembly comprises a Z-shaped static contact, the static contact comprises a wiring board, a contact portion and a first connecting board, the wiring board and the contact portion are arranged in parallel in a staggered mode, the first connecting board is connected with the wiring board and one end of the contact portion, the contact portion is of a U-shaped structure, and a U-shaped groove is formed in the inner side wall of the U-shaped structure. Comprising a supporting part and a bearing part which are arranged in parallel, and a U-shaped bending part which connects the supporting part and one end of the bearing part, and the static contact protrudes out of the upper surface of the bearing part; the arc extinguishing cover comprises a first partition plate covering the first connecting plate, a second partition plate covering the U-shaped bending part and a middle partition plate connecting the first partition plate and the second partition plate, and the middle partition plate is provided with a notch partially exposed out of the bearing part; the run-on plate is fixedly connected with the other end of the bearing part, and one end of the run-on plate extends upwards in the direction of the first connecting plate. The arc extinguishing cover is additionally arranged between the run-on plate and the static contact, so that the protection capability of the static contact during high breaking is improved, and the protection grade of the static contact is improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliance accessories, in particular to a static contact assembly. Background Art

[0002] Circuit breakers primarily protect circuits from damage caused by overloads or short circuits. When a short circuit occurs, the circuit breaker's moving contacts open before the mechanism unlocks, effectively inserting a resistor in series with the circuit, minimizing the flow of current and protecting conductors and electrical devices downstream of the breaker.

[0003] When the circuit breaker is in high-voltage disconnection mode, a large arc will be generated, which will damage the static contacts and thus affect the life of the circuit breaker. Therefore, the static contacts of the circuit breaker need to be protected. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a static contact assembly.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A static contact assembly, comprising:

[0007] A Z-shaped static contact, comprising a wiring board and a contact portion disposed in parallel and offset, and a first connecting plate connecting the wiring board and one end of the contact portion; the contact portion is a U-shaped structure, the inner sidewall of the U-shaped structure forming a U-shaped groove, comprising a supporting portion and a bearing portion disposed in parallel, and a U-shaped bending portion connecting the supporting portion and one end of the bearing portion; the static contact protruding from the upper surface of the bearing portion;

[0008] An arc extinguishing cover, comprising a first partition covering the first connecting plate, a second partition covering the U-shaped bent portion, and an intermediate partition connecting the first partition and the second partition, wherein the intermediate partition is provided with a notch partially exposing the bearing portion;

[0009] The arc striking plate is fixedly connected to the other end of the bearing portion, and one end of the arc striking plate extends upward along the direction of the first connecting plate.

[0010] One end of the bearing portion extends outward to form a fixed end, and a threaded hole for fixing the arc striking plate is provided on the fixed end.

[0011] The upper surface of the fixing end is arranged lower than the upper surface of the bearing portion.

[0012] The distance from the upper surface of the fixed end to the upper surface of the bearing portion is adapted to the thickness of the arc-starting plate.

[0013] A positioning groove is provided at one end of the bearing portion, and a matching positioning protrusion is provided on the side of the arc-starting plate facing the bearing portion.

[0014] The intermediate partitions include a first intermediate partition, a second intermediate partition, and a second connecting plate connecting the first intermediate partition and the second intermediate partition.

[0015] A first notch is provided at the connection between the first intermediate partition and the second connecting plate for exposing the fixed end extending at one end of the bearing part, and a second notch is provided at the connection between the second intermediate partition and the second connecting plate for exposing the static contact, and the first notch and the second notch are connected at the second connecting plate.

[0016] The first connecting plate is arranged obliquely.

[0017] The first connecting plate and the supporting portion are provided with strip-shaped holes, and the strip-shaped holes extend from the first connecting plate to the supporting portion.

[0018] The beneficial effects of the utility model are as follows: by adding an arc extinguishing cover between the arc striking plate and the static contact, the protection capability of the static contact at high breaking pressure is improved, and the protection level of the static contact is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is the main view of the present utility model.

[0021] Figure 3 This is an explosion diagram of the utility model.

[0022] Figure 4 It is a structural schematic diagram of the static contact of the utility model.

[0023] Figure 5 This is a schematic structural diagram of the arc extinguishing cover of the present utility model.

[0024] Figure 6 This is a structural schematic diagram of the arc starting plate of the present utility model. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] like Figure 1 and Figure 2 As shown, the utility model discloses a static contact assembly, which is mainly used in various circuit breakers and is used as a static contact matched with a moving contact.

[0028] like Figure 3 As shown, the static contact assembly consists of a static contact, an arc extinguishing cover and an arc striking plate.

[0029] like Figure 2 As shown, a Z-shaped static contact 100 is made of a conductor such as copper. The static contact 100 includes a terminal block 110 and a contact portion 120 that are staggered and arranged in parallel, and a first connecting plate 130 connecting the terminal block 110 and one end of the contact portion 120. The contact portion 120 is a U-shaped structure, and the inner sidewall of the U-shaped structure forms a U-shaped groove, including a supporting portion 121 and a bearing portion 122 that are arranged in parallel, and a U-shaped bending portion 123 that connects the supporting portion 121 and one end of the bearing portion 122. The static contact 400 protrudes from the upper surface of the bearing portion 122.

[0030] like Figure 5 As shown, the arc extinguishing cover 200 includes a first partition 210 covering the first connecting plate 130, a second partition 220 covering the U-shaped bending portion 123, and an intermediate partition 230 connecting the first partition 210 and the second partition 220, and a gap is provided on the intermediate partition 230 to partially expose the bearing portion 122. The arc extinguishing cover 200 can improve the insulation performance between the static contact and the moving contact, and prevent the arc from moving along the surface of the moving contact toward the root of the moving contact when disconnected.

[0031] like Figure 6 As shown, the arc-striking plate 300 is fixedly connected to the other end of the supporting portion 122, and one end thereof extends upward in the direction of the first connecting plate 130. The arc-striking plate includes a fixed base plate 320 and an arc-striking angle 330 arranged at an angle. The fixed base plate is used to fix to the supporting portion, and the two are fixed with screws or bolts.

[0032] like Figure 4 As shown, one end of the bearing portion 122 extends outward to form a fixed end 124, and the fixed end 124 is provided with a threaded hole 125 for fixing the arc-striking plate 300, which is fixed with screws or bolts, making installation more convenient and allowing the arc-striking plate to be quickly replaced after wear.

[0033] The upper surface of the fixed end 124 is arranged lower than the upper surface of the bearing portion 122 , and preferably the upper end surface of the arc-starting plate fixed on the fixed end is lower than the surface of the static contact.

[0034] The distance between the upper surface of the fixed end 124 and the upper surface of the bearing portion 122 matches the thickness of the arc striking plate 300. This allows the arc striking plate to remain horizontal when mounted on the fixed end, allowing the arc generated by the separation of the moving and static contacts to be better guided by the arc striking plate.

[0035] The bearing portion 122 has a positioning groove 126 at one end, and the arc striking plate 300 has a matching positioning protrusion 310 on the side facing the bearing portion. The mutual cooperation between the positioning groove and the positioning protrusion can effectively prevent the arc striking plate from shaking left and right when the arc striking plate is fixed to the fixed end.

[0036] The intermediate partition 230 includes a first intermediate partition 231 , a second intermediate partition 232 , and a second connecting plate 233 connecting the first intermediate partition 231 and the second intermediate partition 232 .

[0037] A first notch 234 is provided at the connection between the first intermediate partition 231 and the second connecting plate 233 to expose the fixed end 124 extending from one end of the bearing portion 122. A second notch 235 is provided at the connection between the second intermediate partition 232 and the second connecting plate 233 to expose the static contact 400. The first notch 234 and the second notch 235 are connected at the second connecting plate 233. The width of the first notch 234 is smaller than the width of the fixed base plate of the arc striking plate, so that when the arc striking plate is fixed to the fixed end, it can completely cover the first notch. This arrangement allows the arc extinguishing hood to cover as much of the bearing portion as possible, which helps to further improve the insulation performance between the static contact and surrounding components.

[0038] The first connecting plate 130 is arranged at an angle.

[0039] The first connecting plate 130 and the support portion 121 are provided with a strip hole 140, which extends from the first connecting plate 130 to the support portion 121. The design of the strip hole can provide more operating space for the installation of the arc starting plate and also facilitates the subsequent installation of the magnetizing block.

[0040] The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A static contact assembly, characterized in that: It includes: A Z-shaped static contact (100), comprising a wiring board (110) and a contact part (120) arranged in parallel and offset, and a first connecting plate (130) connecting the wiring board (110) and one end of the contact part (120); the contact part (120) is a U-shaped structure, the inner side wall of the U-shaped structure forming a U-shaped groove, comprising a supporting part (121) and a bearing part (122) arranged in parallel, and a U-shaped bending part (123) connecting the supporting part (121) and one end of the bearing part (122); and a static contact point (400) protruding from the upper surface of the bearing part (122); An arc extinguishing cover (200) comprising a first partition plate (210) covering a first connecting plate (130), a second partition plate (220) covering a U-shaped bent portion (123), and a middle partition plate (230) connecting the first partition plate (210) and the second partition plate (220), wherein a notch is provided on the middle partition plate (230) partially exposing the bearing portion (122); The arc striking plate (300) is fixedly connected to the other end of the bearing portion (122), and one end thereof extends upward in the direction of the first connecting plate (130).

2. A static contact assembly according to claim 1, characterized in that: One end of the bearing portion (122) extends outward to form a fixed end (124), and a threaded hole (125) for fixing the arc striking plate (300) is provided on the fixed end (124).

3. The static contact assembly according to claim 2, characterized in that: The upper surface of the fixed end (124) is arranged lower than the upper surface of the bearing portion (122).

4. A static contact assembly according to claim 2 or 3, characterized in that: The distance between the upper surface of the fixed end (124) and the upper surface of the bearing portion (122) is adapted to the thickness of the arc-starting plate (300).

5. The static contact assembly according to claim 3, characterized in that: A positioning groove (126) is provided at one end of the bearing portion (122), and a matching positioning protrusion (310) is provided on the side of the arc-starting plate (300) facing the bearing portion.

6. The static contact assembly according to claim 1, characterized in that: The intermediate partition (230) comprises a first intermediate partition (231), a second intermediate partition (232) arranged in parallel and staggered manner, and a second connecting plate (233) connecting the first intermediate partition (231) and the second intermediate partition (232).

7. The static contact assembly according to claim 6, characterized in that: A first notch (234) for exposing a fixed end (124) extending from one end of the bearing portion (122) is provided at the connection between the first intermediate partition (231) and the second connecting plate (233); a second notch (235) for exposing a static contact (400) is provided at the connection between the second intermediate partition (232) and the second connecting plate (233); and the first notch (234) and the second notch (235) are connected at the second connecting plate (233).

8. The static contact assembly according to claim 1, characterized in that: The first connecting plate (130) is arranged obliquely.

9. The static contact assembly according to claim 1, characterized in that: The first connecting plate (130) and the supporting portion (121) are provided with a strip-shaped hole (140), and the strip-shaped hole (140) extends from the first connecting plate (130) to the supporting portion (121).

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