Anti-falling contact piece of tulip contact

Abstract

The utility model discloses an anti-drop contact piece of a tulip contact, the anti-drop contact piece of the tulip contact comprises a fixed column and annular grid pieces riveted at two ends of the fixed column, the annular grid pieces are inserted with a plurality of contact pieces at equal intervals along the axis direction, annular springs are arranged at the upper and lower parts of the contact pieces, so that the contact pieces are tightly pressed in caulking grooves of the annular grid pieces, and the annular grid pieces are connected with the annular grid pieces. The fixing column is provided with a detachable supporting column, the supporting column is provided with an extending plate, fixing holes are formed in the upper portion and the lower portion of the extending plate, the fixing holes are provided with limiting rings, the limiting rings are arranged between the annular springs, and gaps are kept between the fixing holes and the contact pieces. The outward moving distance of the contact piece is limited through the limiting ring, so that the contact piece is prevented from being separated from the caulking groove of the annular grid piece, the situation that the contact piece and the caulking groove are misplaced and cannot be reset is prevented, the distance between the contact piece and the limiting ring is conveniently adjusted through the detachable supporting column, meanwhile, the switch can be matched with an old product, and the use is convenient. The product has the advantages of limiting function, falling prevention, wide application range and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an anti-dropping contact piece of a plum blossom contact. Background Art

[0002] The plum blossom contact is a component widely used on high-voltage circuit breakers. It is mainly used to connect the high-voltage circuit breaker with the busbar and outgoing conductor to connect the current.

[0003] The existing plum blossom contact includes an annular grid and several contact pieces clamped on the annular grid. An annular spring is provided on the contact piece, and the contact piece is pressed and fixed to the annular grid by the contraction force of the annular spring. In addition, the contact piece is provided with a first protrusion and a second protrusion protruding inward along the radial direction of the annular grid, so that the first protrusion and the second protrusion can effectively clamp the external static contact and the contact arm.

[0004] The problem with the existing plum blossom contact is that when the external static contact and the contact arm are inserted into the plum blossom contact, the plum blossom contact piece will be stretched outward along the radial direction of the annular grid due to the protruding shape of the first protrusion and the second protrusion. Therefore, if the outer radius of the static contact or the contact arm is too large, the contact piece will be completely pushed out of the embedding groove during the insertion process, which may cause the contact piece to be misaligned with the embedding groove, making it impossible to reset and causing unstable clamping. Therefore, the applicant has made a useful design and found a solution to the above problem. The technical solution to be introduced below was produced in this context. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology designs and to provide a product with a limiting function, which can prevent falling off and has a wide range of applications.

[0006] In order to solve the above problems, the present invention adopts the following technical solutions.

[0007] A plum blossom contact anti-drop contact piece includes a fixed column and annular grids riveted to both ends of the fixed column. The annular grid is provided with a plurality of equally spaced contact pieces in the axial direction. Annular springs are provided above and below the contact pieces to press the contact pieces into the embedding grooves of the annular grid pieces. The fixed column is provided with a detachable support column, and the support column is provided with an extension plate. The extension plate is provided with fixing holes above and below. The fixing holes are provided with limiting rings and are arranged between the annular springs to maintain a distance from the contact pieces.

[0008] Preferably, the support column is provided with a notch, and elastic parts are provided on both sides of the notch and shrink toward the middle of the notch.

[0009] Preferably, the extension plate is provided with a threaded hole and passes through the fixing hole, and the threaded hole is provided with a headless screw and passes through the limiting ring.

[0010] Preferably, limiting blocks are provided on both sides of one end of the limiting ring and abut against the extension plate, and the limiting blocks are provided with through holes corresponding to the threaded holes.

[0011] Preferably, a plurality of equally spaced limiting grooves are provided above and below the contact piece, the annular spring is arranged in the limiting groove, the contact piece is provided with a first protrusion and a second protrusion, and the first protrusion abuts against the end face of the annular grid piece.

[0012] Beneficial effects:

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The utility model limits the outward movement distance of the contact piece by the limit ring, thereby preventing the contact piece from escaping from the embedding groove of the annular grid piece, and preventing the contact piece and the embedding groove from being misaligned and causing the situation that the reset cannot occur. Through the detachable support column, it is only necessary to adjust the center distance between the fixing hole and the support column during the production process, and produce products of corresponding models. The support column can be replaced, and the distance between the contact piece and the limit ring can be adjusted and limited. At the same time, it can be adapted to old products, thereby overcoming the problems raised by the background technology, and making the product have the advantages of limiting function, preventing falling off, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of an anti-drop contact piece of a plum blossom contact of the present invention;

[0016] Figure 2 This is a partial exploded view of the anti-drop contact piece of a plum blossom contact of the present invention;

[0017] Figure 3 This is an exploded view of an anti-drop contact piece of a plum blossom contact of the present invention;

[0018] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0019] Figure numerals: 1, fixing column; 2, annular grid; 3, contact piece; 4, annular spring; 5, support column; 6, limiting ring; 31, limiting groove; 32, first protrusion; 33, second protrusion; 51, extension plate; 52, fixing hole; 53, notch; 54, elastic part; 55, headless screw; 511, threaded hole; 61, limiting block; 62, through hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. 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.

[0021] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left" and "right" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0022] Reference example Figures 1 to 3 A plum blossom contact anti-drop contact piece includes a fixed column 1 and an annular grid 2 riveted to both ends of the fixed column 1. The annular grid 2 is inserted with a number of equally spaced contact pieces 3 in the axial direction. An annular spring 4 is provided above and below the contact piece 3 to press the contact piece 3 tightly into the embedding groove of the annular grid 2. The fixed column 1 is provided with a detachable support column 5, and the support column 5 is provided with an extension plate 51. The upper and lower parts of the extension plate 51 are provided with fixing holes 52. The fixing hole 52 is provided with a limiting ring 6 and is arranged between the annular spring 4 and keeps a distance from the contact piece 3. The limiting ring 6 limits the outward movement distance of the contact piece 3, thereby preventing the contact piece 3 from escaping from the embedding groove of the annular grid piece 2, and preventing the contact piece 3 from being misaligned with the embedding groove, which would cause the contact piece 3 to be unable to reset. The detachable support column 5 only needs to adjust the center distance between the fixing hole 52 and the support column 5 during the production process, and produce the corresponding model of products. The support column 5 can be replaced to adjust the distance between the contact piece 3 and the limiting ring 6 and limit them. At the same time, it can be adapted to older models of products, thereby overcoming the problems raised by the background art.

[0023] It is worth mentioning that the support column 5 is provided with a notch 53, and elastic parts 54 are provided on both sides of the notch 53 and shrink toward the middle of the notch 53. The notch 53 facilitates the support column 5 to enter the fixed column 1. The elastic parts 54 firmly fix the support column 5 on the fixed column 1, providing strong support for the limiting ring 6. The elastic parts 54 facilitate the replacement of support columns 5 of different models.

[0024] It is worth mentioning that the extension plate 51 is provided with a threaded hole 511 and passes through the fixing hole 52. The threaded hole 511 is provided with a headless screw 55 and passes through the limiting ring 6. The threaded hole 511 is used in conjunction with the headless screw 55. The headless screw 55 mainly fixes the limiting ring 6.

[0025] It is worth mentioning that a limiting block 61 is provided on both sides of one end of the limiting ring 6 and abuts the extension plate 51. The limiting block 61 is provided with a through hole 62 corresponding to the threaded hole 511. When installing the limiting ring 6, it is only necessary to insert the limiting ring 6 into the fixing hole 52 so that the limiting block 61 abuts the extension plate 51. The through hole 62 naturally corresponds to the threaded hole 511, thereby facilitating the fixing of the limiting ring 6 by the headless screw 55, reducing assembly time and improving assembly convenience.

[0026] It is worth mentioning that a number of equally spaced limiting grooves 31 are provided above and below the contact piece 3, the annular spring 4 is arranged in the limiting groove 31, and the contact piece 3 is provided with a first protrusion 32 and a second protrusion 33, and the first protrusion 32 abuts against the end face of the annular grid piece 2.

[0027] The above design scheme can enable the product to have the advantages of limiting function, preventing falling off, and wide application range.

[0028] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A contact piece for preventing a plum blossom contact from falling off, comprising a fixing column (1) and an annular grid (2) riveted to both ends of the fixing column (1), wherein the annular grid (2) is provided with a plurality of equally spaced contact pieces (3) in the axial direction, and annular springs (4) are provided above and below the contact piece (3) to press the contact piece (3) tightly into the embedded groove of the annular grid (2), characterized in that: The fixing column (1) is provided with a detachable supporting column (5), the supporting column (5) is provided with an extension plate (51), the upper and lower parts of the extension plate (51) are provided with fixing holes (52), the fixing hole (52) is provided with a limiting ring (6), and is arranged between the annular springs (4) and maintains a distance from the contact piece (3).

2. The anti-drop contact piece of the plum blossom contact according to claim 1, characterized in that: The support column (5) is provided with a notch (53), and elastic parts (54) are provided on both sides of the notch (53) and shrink toward the middle of the notch (53).

3. The anti-drop contact piece of the plum blossom contact according to claim 1, characterized in that: The extension plate (51) is provided with a threaded hole (511) and passes through the fixing hole (52); the threaded hole (511) is provided with a headless screw (55) and passes through the limiting ring (6).

4. The anti-drop contact piece of the plum blossom contact according to claim 3, characterized in that: Limiting blocks (61) are provided on both sides of one end of the limiting ring (6) and abut against the extension plate (51). The limiting blocks (61) are provided with through holes (62) corresponding to the threaded holes (511).

5. The anti-drop contact piece of the plum blossom contact according to claim 1, characterized in that: A plurality of equally spaced limiting grooves (31) are provided above and below the contact piece (3); the annular spring (4) is arranged in the limiting groove (31); the contact piece (3) is provided with a first protrusion (32) and a second protrusion (33); the first protrusion (32) abuts against the end face of the annular grid piece (2).

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