Pin for bus duct jack box

Abstract

The utility model discloses a pin for a bus duct jack box, which comprises a left side unit and a right side unit, the left side unit and the right side unit have the same structure and are symmetrically arranged, and each unit comprises a copper insertion sheet, a spring sheet and a bracket, the electric connector is characterized in that the copper insertion sheet comprises a vertical plane section, an outwardly inclined upper transition inclined plane section, an inwardly inclined lower transition inclined plane section, an electric contact inclined plane section and an outwardly inclined guide inclined plane section from top to bottom; the spring piece is arranged on the outer side of the copper insertion piece; the support is arranged on the outer side of the vertical plane section of the spring piece. After the left unit and the right unit are in butt joint, the electric contact inclined surface sections of the copper inserts on the two sides form a V-shaped structure, the V-shaped opening is opened after the insertion port conductor is inserted, and the electric contact inclined surfaces are integrally in contact with the insertion port conductor under the action of the pressing edges at the bottoms of the spring pieces, so that the effective contact area between the copper inserts and the insertion port conductor is greatly increased; the contact resistance is reduced, and the power distribution reliability of the jack box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution equipment, in particular to a component for a bus duct, specifically a plug pin for a bus duct plug-in box. Background Art

[0002] In low-voltage power supply systems, bus duct systems are widely used due to their large current carrying capacity, flexible tapping, and beautiful appearance. Bus duct plug-in box units are mainly used for power distribution in bus duct power supply systems. When the plug-in box is plugged in, the pins and the conductors of the main unit plug interface are connected by plugging, which makes it very convenient to get power. The main structure of the traditional plug-in box pin and the plug interface conductor connection is as follows: Figure 1 As shown, it is composed of a copper plug 1, a spring sheet 2, a plug interface conductor 3, etc. The head of the traditional plug box pin copper plug 1 is designed as a round arc surface, and is connected with the plug interface conductor by line contact. When the thickness of the plug interface conductor is thin (such as less than 3mm), the deformation of the spring sheet is small, and the lateral pressing force of the spring sheet is small, the line contact resistance is large, and the temperature rise of the plug point is high. It is easy to burn out the pin during the operation of the plug box, causing a power failure such as a lack of phase.

[0003] This project develops a plug for a bus duct plug-in box. The electrical contact surface of the copper plug of the plug is designed to be an inclined surface. The copper plug and the plug interface conductor are connected by surface contact, which increases the effective contact area between the copper plug and the plug interface conductor, reduces the contact resistance, improves the reliability of the power distribution of the plug-in box, and also improves the power quality of the power distribution of the plug-in box. Summary of the invention

[0004] The utility model aims to solve the above-mentioned technical problems existing in the prior art, and aims to provide a novel plug pin for a bus duct plug-in box.

[0005] In order to solve the above problems, the utility model adopts the following technical solutions: a plug for a busbar duct plug-in box, comprising a left unit and a right unit, the left and right units have the same structure and are symmetrically arranged, each unit comprises a copper plug, a spring sheet and a bracket, characterized in that the copper plug comprises a vertical plane section from top to bottom, an outwardly inclined upper transition slope section, an inwardly inclined lower transition slope section, an electrical contact slope section and an outwardly inclined guide slope section, the electrical contact slope section is also inclined inwardly, and its symmetry center is The angle between the surfaces is smaller than the angle between the lower transition slope section and the symmetry center plane; the spring sheet is arranged on the outer side of the copper plug sheet, including a vertical plane section from top to bottom, an outward-inclined upper pressing slope section and an inward-inclined lower pressing slope section, the vertical plane section and the upper pressing slope section of the spring sheet are respectively fitted with the vertical plane section and the upper transition slope section of the copper plug sheet, and the bottom pressing edge of the spring sheet is against the outer side of the electrical contact slope section of the spring sheet; the bracket is arranged on the outer side of the vertical plane section of the spring sheet.

[0006] The plug pins for the busbar duct plug-in box of the utility model, after the left and right side units are butt-jointed, the upper and lower transition slope sections on both sides form a prismatic space for accommodating the plug-in interface conductor to meet the plug-in requirements of the plug-in interface conductors of different widths. The electrical contact slope sections of the copper plugs on both sides form a V-shaped structure. After the plug-in interface conductor is inserted, the V-shaped mouth opens. Under the action of the pressing edge at the bottom of the spring sheet, the electrical contact slope contacts the plug-in interface conductor as a whole, which greatly increases the effective contact area between the copper plug and the plug-in interface conductor, reduces the contact resistance, and improves the reliability of the power distribution of the plug-in box. The spring sheet is used to press the copper plug to ensure good electrical contact between the copper plug and the plug-in interface conductor. The guide slope sections of the copper plugs on both sides form a downward trumpet to guide the insertion of the plug-in interface conductor.

[0007] As an improvement of the present invention, the inclination of the electrical contact slope section can be designed according to the different thicknesses of the plug interface conductor, so that the electrical contact slope and the plug interface conductor form an electrical contact plane after plugging. Preferably, the angle between the electrical contact slope section of the copper plug and the symmetric center plane is 1-3°. More preferably, the angle between the electrical contact slope section of the copper plug and the symmetric center plane is 2°.

[0008] As a further improvement of the utility model, the inclination of the upper and lower transition slopes of the copper plug should be selected in an appropriate range. If the inclination is too small, the tension of the spring will be insufficient, and if the inclination is too large, the space of the product will be increased, which is not conducive to assembly. Preferably, the angle between the lower transition slope section of the copper plug and the symmetric center plane is 15-20°. More preferably, the angle between the lower transition slope section of the copper plug and the symmetric center plane is 17-19°. Most preferably, the angle between the lower transition slope section of the copper plug and the symmetric center plane is 18°.

[0009] As a further improvement of the utility model, the bracket is L-shaped, including an upper horizontal part and a lower vertical part, and the horizontal part is provided with a positioning groove. The positioning groove is used for positioning and installing with the pin seat during assembly.

[0010] As a further improvement of the present invention, the vertical plane section of the copper insert is provided with a circular hole for connecting an outgoing cable.

[0011] As a further improvement of the present invention, the left and right side units are connected by copper rivets, which simplifies assembly and increases the conductivity of the pins.

[0012] As a further improvement of the utility model, a group of small round holes are provided at corresponding positions of the copper insert, the spring sheet and the bracket for installing rivets.

[0013] As a further improvement of the present invention, in the embodiment, the PE pin is 3-5 mm longer than the phase (A, B, C, N) pins to achieve the safety protection requirement of first connecting and then separating the PE pins when the plug box is plugged in or out. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model will be further described below in conjunction with the accompanying drawings.

[0015] Figure 1 The present invention is a schematic diagram of the main structure of the connection between the plug pins of a plug box and the conductors of a plug interface in the prior art.

[0016] Figure 2 The utility model discloses an axonometric drawing of a plug pin for a bus duct plug-in box.

[0017] Figure 3 The utility model is a front view of a plug pin for a bus duct plug-in box.

[0018] Figure 4 yes Figure 3 Palace view.

[0019] Figure 5 yes Figure 3 Left view of .

[0020] Figure 6 yes Figure 3 Section view.

[0021] Figure 7 yes Figure 6 Partial enlarged image.

[0022] Figure 8 This is a front view of the plug pin of the utility model in the use state before being plugged in.

[0023] Fig. 9 It is a front view of the plug pin of the utility model in the use state after being plugged in.

[0024] Fig.10 It is a state view of the utility model.

[0025] Fig.11 yes Fig. 9 Partial enlarged image.

[0026] In the figure, 1 is a copper plug, 2 is a spring sheet, 3 is a plug interface conductor, 4 is an electrical contact circular arc surface, 5 is a plug pin for a bus duct plug-in box of the utility model, 6 is a copper plug, 7 is a spring sheet, 8 is a bracket, 9 is a rivet, 10 is a plug-in box bottom plate, 11 is a plug seat, 12 is a plug cover, 13 is a screw fastener, 14 is a screw fastener, 15 is a guide slope section, 16 is an electrical contact slope section, 17 is a lower transition slope section, 18 is an upper transition slope section, 19 is a circular hole, 20 is a clamping slope section, 21 is a clamping slope section, 22 is a clamping edge, 23 is a positioning groove, 24 is an electrical contact plane section, 25 is an extended size of a PE pin, 26 is a vertical plane section of the copper plug, 27 is a symmetric center plane, and 28 is a vertical plane section of the spring sheet. DETAILED DESCRIPTION

[0027] Figure 1 The defects of the connection structure between the plug pins of the plug box and the conductor of the plug interface in the prior art have been described above and will not be repeated here.

[0028] Reference Figures 2 to 7 The utility model discloses a plug pin for a bus duct plug-in box, comprising a left unit and a right unit, wherein the left and right units have the same structure and are symmetrically arranged. Each unit comprises a copper plug 6, a spring sheet 7 and a bracket 8.

[0029] Specifically, the copper insert 6 includes a vertical plane section 26 from top to bottom, an outward-inclined upper transition slope section 18, an inward-inclined lower transition slope section 17, an electrical contact slope section 16 and an outward-inclined guide slope section 15. The electrical contact slope section 16 is also inclined inward, and the angle a between it and the symmetry center plane 27 is smaller than the angle b between the lower transition slope section and the symmetry center plane.

[0030] The upper surface of the vertical plane section 26 of the copper insert 6 is designed with a circular hole 19 for connecting an outgoing cable (not shown in the figure), and the surface of the middle part is designed with a group of small circular holes for installing rivets 9.

[0031] The spring sheet 7 is located outside the copper insert 6, and includes a vertical plane section 28 from top to bottom, an outward-inclined upper pressing slope section 21, and an inward-inclined lower pressing slope section 20. The vertical plane section 28 and the upper pressing slope section 21 of the spring sheet are respectively fitted with the vertical plane section 26 and the upper transition slope section 18 of the copper insert, and the bottom pressing edge 22 of the spring sheet abuts against the outer side of the electrical contact slope section 16 of the spring sheet. A group of small circular holes are designed on the upper part of the vertical plane section 28 of the spring sheet 7, and the small circular holes are used to install the rivets 9.

[0032] The bracket 8 is located outside the spring sheet 7 and is in an L-shaped structure, consisting of an upper horizontal part and a lower vertical part. The horizontal part is designed with a positioning groove 23, which is used for positioning and installing with the pin seat 11 during assembly. The vertical part is designed with a group of small round holes, which are used to install rivets 9. The rivets 9 are located in the small round holes of the copper insert and the spring sheet. The rivets 9 rivet the left and right copper inserts 6, the left and right spring sheets 7 and the left and right brackets 8 together to complete the power distribution function of the plug-in box pins.

[0033] See also Figures 8-10 In the embodiment, a group of the utility model pins 5 (A, B, C, N, PE) are respectively installed in the front and rear rows of mounting holes of the pin seat 11, the pin cover 12 is located above the socket seat, and the screw fasteners 14 and 15 install the utility model pins 5, the pin seat 11, and the pin cover 12 on the upper surface of the plug box bottom plate 10. The pins 5 exposed on the upper surface of the pin cover 12 are used to connect the outgoing cable (not shown in the figure), and the pins 5 exposed on the lower surface of the pin seat 11 are used to plug with the socket conductor 3.

[0034] See further Figure 7 , Fig.11 Before the plug pin of the utility model is plugged in, the electrical contact slope 16 of the left-right symmetrical copper plug 6 forms a V-shaped structure that is wide at the top and narrow at the bottom. After plugging in, the V-shaped mouth opens when the copper plug 6 contacts the plug interface conductor 3. Under the action of the pressing edge 22 at the bottom of the spring sheet, the electrical contact slope is transformed into an electrical contact plane 24, which increases the effective contact area between the copper plug 6 and the plug interface conductor 3, reduces the contact resistance, and improves the reliability of the power distribution of the plug box.

[0035] The copper plug part of the utility model can be stamped with copper bar, the material width and thickness can be designed according to the current size of the plug-in box, the surface is tinned or silver-plated, and the part has good conductivity; the spring part can be stamped with 65Mn steel sheet, the material width is consistent with the copper plug width, the thickness is 1.2~1.5mm, the surface is galvanized, and the part has good elasticity and corrosion resistance; the bracket part can be stamped with steel plate, the surface is galvanized, and the part has good corrosion resistance; the rivet can be copper rivet to increase the conductivity of the pin. The above parts are easy to realize.

[0036] The utility model discloses a plug pin for a bus duct plug-in box, wherein the copper plug sheet and the plug-in interface conductor are in surface contact connection, thereby increasing the effective contact area between the plug pin and the plug-in interface conductor. When the plug-in interface conductor is thin (less than 3 mm), good electrical connection between the plug pin and the plug-in interface conductor can still be ensured, thereby improving the reliability of the power distribution of the plug-in box and also improving the power quality of the power distribution of the plug-in box.

[0037] The utility model provides a plug pin for a bus duct plug-in box, which has the characteristics of simple structure, convenient plug-in, good versatility, stable performance, etc. It is mainly used for power distribution of plug-in box units when the conductor of the plug-in interface of the bus trunk unit is thin (less than 3mm), and is an economical and practical product.

[0038] It should be understood that the above description is only an explanation of the present invention, rather than a limitation of the present invention, and any invention that does not exceed the essential spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A plug for a bus duct plug-in box, comprising a left unit and a right unit, wherein the left and right units have the same structure and are symmetrically arranged, and each unit comprises a copper insert, a spring sheet and a bracket, characterized in that The copper plug includes a vertical plane section from top to bottom, an outward-inclined upper transition slope section, an inward-inclined lower transition slope section, an electrical contact slope section and an outward-inclined guide slope section. The electrical contact slope section is also inclined inward, and its angle with the symmetry center plane is smaller than the angle between the lower transition slope section and the symmetry center plane; the spring sheet is arranged on the outside of the copper plug, including a vertical plane section from top to bottom, an outward-inclined upper clamping slope section and an inward-inclined lower clamping slope section. The vertical plane section and the upper clamping slope section of the spring sheet are respectively fitted with the vertical plane section and the upper transition slope section of the copper plug, and the bottom clamping edge of the spring sheet is against the outside of the electrical contact slope section of the spring sheet; the bracket is arranged on the outside of the vertical plane section of the spring sheet.

2. A plug pin for a bus duct plug-in box as claimed in claim 1, characterized in that The angle between the electrical contact slope section of the copper plug and the symmetry center plane is 1-3°.

3. A plug pin for a bus duct plug-in box as claimed in claim 2, characterized in that The angle between the electrical contact slope section of the copper plug and the symmetry center plane is 2°.

4. A plug pin for a bus duct plug-in box as claimed in claim 1, characterized in that The angle between the lower transition slope section of the copper insert and the symmetry center plane is 15-20°.

5. A plug pin for a bus duct plug-in box as claimed in claim 4, characterized in that The angle between the lower transition slope section of the copper insert and the symmetry center plane is 17-19°.

6. A plug pin for a bus duct plug-in box as claimed in claim 5, characterized in that The angle between the lower transition slope section of the copper insert and the symmetry center plane is 18°.

7. A plug pin for a bus duct plug-in box as claimed in claim 1, characterized in that The bracket is L-shaped, comprising an upper horizontal part and a lower vertical part, and the horizontal part is provided with a positioning groove.

8. A plug pin for a bus duct plug-in box as claimed in claim 1, characterized in that The vertical plane section of the copper insert is provided with a circular hole for connecting an outgoing cable.

9. A plug pin for a bus duct plug-in box as claimed in any one of claims 1 to 8, characterized in that The left and right side units are connected by copper rivets.

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