Economical and efficient bridge type contact

Abstract

The utility model discloses an economical and efficient bridge-type contact which comprises a support assembly, and the upper end and the lower end of the support assembly are respectively provided with a contact piece group in a pressing mode through a spring piece. The support assembly comprises a front vertical frame and a rear vertical frame which are symmetrically arranged, two contact piece installation frames are arranged between the two vertical frames in a bilateral symmetry mode, and a plurality of partition teeth are symmetrically arranged at the upper ends and the lower ends of the contact piece installation frames at equal intervals along the frame edges. The contact piece group comprises a plurality of contact pieces which are erected on the left and right contact piece mounting racks in a crossing manner, and the contact pieces are arranged at tooth roots between the corresponding front and rear partition teeth, so that a heat dissipation space groove is formed between the front and rear adjacent contact pieces due to the partition of the partition teeth; according to the utility model, under the condition that the original temperature rise index is kept at the same level and meets the standard, the drawer seat contact which is more economical and has higher cost performance is achieved by using less copper materials, and meanwhile, a scheme is provided for reducing the temperature rise.

Description

An economical and efficient bridge-type contact Technical Field

[0001] This utility model relates to the field of circuit breaker contact structure technology, and in particular to an economical and efficient bridge-type contact. Background Technology

[0002] In the complex international political environment, with both international and domestic economic growth facing challenges, product prices have become a major factor in socio-economic activities. On the other hand, product quality and performance need further improvement. Therefore, providing cost-effective products is a primary focus for future efforts. In the power distribution industry, the temperature rise index of drawer-type circuit breakers is an important indicator for judging their performance.

[0003] The mainstream bridge-type contacts on the market (as shown in Figure 1) often use a large number of copper contact pieces to meet the temperature rise requirements. The contact pieces are separated by partitions or placed next to each other. However, this results in a large amount of copper used in the circuit breaker drawer, which increases the cost and is not conducive to heat dissipation, so improvements are needed. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide an economical and efficient bridge-type contact. While maintaining the same temperature rise index and meeting the standard, it uses less copper material to achieve a more economical and cost-effective drawer seat contact. At the same time, it also provides a solution for how to reduce temperature rise.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an economical and efficient bridge-type contact, including a support assembly, one end of which is connected to a terminal block, and both the upper and lower ends of the support assembly are fitted with contact plate groups by spring plates.

[0006] The bracket assembly includes two symmetrically arranged vertical frames at the front and rear, and two contact plate mounting frames symmetrically arranged between the two vertical frames. The upper and lower ends of the contact plate mounting frames are symmetrically arranged with several partition teeth equidistantly arranged along the edge of the frame.

[0007] The contact plate group includes several contact plates that are mounted across the left and right contact plate mounting brackets, and each contact plate is located at the root of the tooth between its corresponding front and rear partition teeth, so that a heat dissipation space groove is formed between two adjacent front and rear contact plates due to the partition teeth.

[0008] By adopting the above technical solution, the contact area between the contact piece and the air is increased, and the heat dissipation space groove formed and the heat dissipation gap left between the arc-shaped spring piece together form a vertical heat dissipation channel.

[0009] Both ends of the contact piece are provided with arc-shaped portions that bulge outward to the same side, so that when the contact piece is assembled, the left and right ends of the outer side form arc-shaped inner grooves.

[0010] By adopting the above technical solution, the outward-protruding arc-shaped parts at both ends can increase the contact area between the contact piece and the main body insert and external wiring terminal, thereby reducing resistance and heat generation.

[0011] The spring sheet includes a central pressure plate with a central arc-shaped concave surface. The left and right ends of the central pressure plate are provided with arc-shaped spring pieces whose number and position match the contact piece. The central pressure plate is provided with heat dissipation holes at equal intervals, and heat dissipation gaps are left between adjacent arc-shaped spring pieces.

[0012] Furthermore, the vertical frame of this utility model has pin holes at both the upper and lower ends. During assembly, the cylindrical pin passes through the pin holes on the front and rear ends of the vertical frame to press the spring sheet inward and form a self-locking mechanism with the central arc-shaped concave surface, locking the spring sheet to prevent it from sliding left and right.

[0013] Furthermore, the heat dissipation space groove between adjacent contact pieces and the heat dissipation gap between adjacent arc-shaped spring pieces in this utility model correspond to each other to form a vertical heat dissipation channel.

[0014] Furthermore, the contact piece of this utility model is provided with a slot for engaging with the contact piece mounting bracket;

[0015] By adopting the above technical solution, the bayonet is used to prevent the contact piece from sliding left and right.

[0016] Furthermore, the arc-shaped portions at the left and right ends of the contact piece described in this utility model have different degrees of outward protrusion;

[0017] By adopting the above technical solution, the two ends of the contact piece are designed with one high and one low arc for self-locking, so that the bridge-shaped contact will not fall off.

[0018] Furthermore, during assembly, the arc-shaped spring piece on the spring sheet engages with the arc-shaped inner groove on the corresponding contact piece to press firmly.

[0019] The beneficial effects of this utility model are:

[0020] 1. The present invention provides an economical and efficient bridge-type contact that makes good use of the skin effect of alternating current. The contact pieces are designed as a combination of multiple spaced-apart pieces. With the help of thinner contact pieces, the number of contact pieces can be increased while keeping the width of the insert blade constant, thereby maximizing the surface area of ​​the contact pieces and improving the Icw index of the drawer-type circuit breaker.

[0021] 2. The design of the contact pieces being arranged at intervals allows the heating element (contact pieces) to fully contact the air and carry away heat. This achieves the same temperature rise effect as before while halving the amount of copper used in the bridge-type contacts, thus creating a more cost-effective product.

[0022] 3. The outwardly convex arc-shaped portions with different amplitudes designed at both ends of the contact piece body can simultaneously facilitate better assembly and increase the contact surface between the contact piece and the body insert and external wiring terminal;

[0023] 4. This utility model has a simple structure, ingenious design, a robust overall structure, and is easy to install. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a schematic diagram of the structure of the mainstream bridge-type contact in the market in the prior art;

[0026] Figure 2 is a structural schematic diagram of this utility model;

[0027] Figure 3 is a structural schematic diagram of the support assembly in this utility model;

[0028] Figure 4 is a schematic diagram of the spring sheet in this utility model;

[0029] Figure 5 is a schematic diagram of the contact piece in this utility model;

[0030] Figure 6 is a schematic diagram of the structure of this utility model showing three rows of heat dissipation channels in a top view.

[0031] The following are the labels in the diagram: 1. Terminal head, 2. Spring plate, 3. Vertical bracket, 4. Contact plate mounting bracket, 5. Isolation tooth, 6. Contact plate, 7. Arc-shaped part, 8. Inner groove, 9. Central arc-shaped concave surface, 10. Central pressure plate, 11. Arc-shaped spring, 12. Heat dissipation through hole, 13. Pin hole, 14. Cylindrical pin, 15. Bayonet, 16. Vertical heat dissipation channel. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] As shown in Figures 2 to 6, an economical and efficient bridge-type contact includes a support assembly. One end of the support assembly is connected to a terminal block 1, and both the upper and lower ends of the support assembly are fitted with contact plate groups by spring plates 2.

[0034] The bracket assembly includes two symmetrically arranged vertical frames 3 at the front and rear, and two symmetrically arranged contact plate mounting frames 4 between the two vertical frames 3. Several partition teeth 5 are symmetrically arranged at the upper and lower ends of the contact plate mounting frames 4 along the edge of the frame.

[0035] In order to facilitate molding and meet performance standards, the spacing between the partition teeth 5 is 1 to 2.5 mm.

[0036] The contact plate group includes several contact plates 6 that are mounted across the left and right contact plate mounting brackets 4. Each contact plate 6 is located at the root of the tooth between its corresponding front and rear partition teeth 5, so that a heat dissipation space groove is formed between two adjacent contact plates 6 due to the partition teeth 5. Both the left and right ends of the contact plate 6 are provided with arc-shaped portions 7 that bulge outward to the same side, so that the left and right ends of the outer side of the contact plate 6 form arc-shaped inner grooves 8 when the contact plate 6 is in the assembled state.

[0037] In this design, the contact pieces are arranged in a symmetrical array. Under constant pressure, if the contact pieces are too thin, a razor-like effect can occur, causing scratches to appear on the main body insert (busbar) as it moves in and out. Therefore, the contact piece thickness (h) is generally designed to be 1.5–4.5 mm. For a 1600A housing, 1.5–2.5 mm is recommended; for a 2000A housing, 2–3 mm is recommended; and for a 3200A housing, 3–4.5 mm is recommended.

[0038] On the other hand, a gap of more than 0.5mm is maintained between the vertical bracket 3 and the corresponding outermost contact piece 6 to ensure that the movement of the contact piece is not interfered with by the bracket. In view of the above bracket width (H) design, it is recommended that the 1600A frame be 40-55mm, the 2000A frame be 50-65mm, and the 3200A frame be 80-95mm.

[0039] The spring sheet 2 includes a central pressure sheet 10 with a central arc-shaped concave surface 9. The left and right ends of the central pressure sheet 10 are provided with arc-shaped spring sheets 11 at equal intervals, and the number and position of the spring sheets 11 match those of the contact sheet 6. The central pressure sheet 10 is provided with heat dissipation holes 12 at equal intervals, and heat dissipation gaps are left between adjacent arc-shaped spring sheets 11.

[0040] The vertical frame 3 has pin holes 13 at both the top and bottom. During assembly, the cylindrical pin 14 passes through the pin holes 13 on the front and rear ends of the two vertical frames 3 to press the spring sheet 2 inward and form a self-locking mechanism with the central arc-shaped concave surface 9.

[0041] The heat dissipation space groove between adjacent contact pieces 6 and the heat dissipation gap between adjacent arc-shaped spring pieces 11 correspond to each other to form a vertical heat dissipation channel 16.

[0042] The contact piece 6 is provided with a latch 15 for engaging with the contact piece mounting bracket 4. The arc-shaped portions 7 at the left and right ends of the contact piece 6 protrude at different angles. During assembly, the arc-shaped spring piece 11 on the spring piece 2 engages with the corresponding arc-shaped inner groove 8 on the contact piece 6 to press them together.

[0043] Through the above improvements, drawer-type circuit breakers can significantly reduce the amount of copper contacts used while maintaining or slightly improving their temperature rise and Icw (increase and current) performance, thus achieving a low-carbon economy. For bridge-type contacts, the copper usage can be reduced by approximately 60% for the 1600A frame, 80% for the 2000A frame, and approximately 40% for the 3200A frame. This makes the product line more cost-effective and competitive in the market, while also providing a simple, reliable structure and easy installation.

[0044] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An economical and efficient bridge-type contact, characterized in that: The system includes a support assembly, one end of which is connected to a terminal block (1). Both ends of the support assembly are fitted with contact plate groups via spring plates (2). The support assembly includes two symmetrically arranged vertical frames (3), with two contact plate mounting frames (4) symmetrically arranged between the two vertical frames (3). Each contact plate mounting frame (4) has several equidistant partition teeth (5) symmetrically arranged along its edge at its upper and lower ends. Each contact plate group includes several contact plates (6) spanning across the left and right contact plate mounting frames (4), with each contact plate (6) positioned at the root of its corresponding front and rear partition teeth (5), ensuring that the front and rear... A heat dissipation space groove is formed between two adjacent contact pieces (6) due to the separation of the partition teeth (5); both the left and right ends of the contact piece (6) are provided with arc-shaped parts (7) that bulge outward to the same side, so that the left and right ends of the outer side of the contact piece (6) form arc-shaped inner grooves (8) when the contact piece (6) is assembled; the spring piece (2) includes a central pressure piece (10) with a central arc-shaped inner concave surface (9), and both the left and right ends of the central pressure piece (10) are provided with arc-shaped spring pieces (11) in number and position that match the contact piece (6). The central pressure piece (10) is provided with heat dissipation through holes (12) at equal intervals, and a heat dissipation gap is left between the front and rear adjacent arc-shaped spring pieces (11).

2. The economical and efficient bridge-type contact as described in claim 1, characterized in that: The vertical frame (3) has pin holes (13) at both the top and bottom ends. During assembly, the cylindrical pin (14) passes through the pin holes (13) on the front and rear ends of the two vertical frames (3) to press the spring sheet (2) inward and form a self-locking with the central arc-shaped concave surface (9).

3. The economical and efficient bridge-type contact as described in claim 1, characterized in that: The heat dissipation space groove between adjacent contact pieces (6) and the heat dissipation gap between adjacent arc-shaped spring pieces (11) correspond to each other to form a vertical heat dissipation channel (16).

4. The economical and efficient bridge-type contact as described in claim 1, characterized in that: The contact piece (6) is provided with a slot (15) for engaging with the contact piece mounting bracket (4).

5. The economical and efficient bridge-type contact as described in claim 1, characterized in that: The arc-shaped portions (7) at the left and right ends of the contact piece (6) protrude to different degrees.

6. The economical and efficient bridge-type contact as described in claim 1, characterized in that: During assembly, the arc-shaped spring piece (11) on the spring piece (2) is pressed together with the arc-shaped inner groove (8) on the corresponding contact piece (6).

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