Power connection terminal connection structure and manufacturing method thereof

Abstract

The invention discloses a power connection terminal connection structure which comprises a long-strip-shaped metal sheet, one end of the metal sheet is provided with a needle-shaped part, the other end of the metal sheet is provided with a first wrapping sheet used for holding the skin of an electric wire, and the metal sheet is provided with a second wrapping sheet used for holding the core wire of the electric wire on one side of the first wrapping sheet. The first wrapping piece and the second wrapping piece can be bent and then shaped. The method for manufacturing the power connection terminal connection structure comprises the steps that a planar sheet part is formed on a sheet metal part through stamping, the planar sheet part comprises a first transverse strip, a second transverse strip and a vertical strip, a protruding strip is formed on the second transverse strip, the two ends of the first transverse strip are bent upwards to form a first wrapping sheet, and the two ends of the second transverse strip are bent upwards to form a second wrapping sheet; the two ends of the second transverse strip are bent upwards to form the second wrapping pieces, the metal pieces extending the vertical strip are formed along the two side edges of the vertical strip in a stamping mode, the needle-shaped parts are formed at the ends, away from the plane piece parts, of the metal pieces in a stamping mode, the structure is simplified, the assembling procedure is more convenient, the production and machining efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The present invention relates to a connection structure of a power connection terminal and a manufacturing method thereof. Background Art

[0002] The power connection terminals of some electrical appliances are needle-shaped parts, such as the emission needles of negative ion generators. These power connection terminals need to connect the core wires of the electric wires to conduct electricity, and also need to be fixed on the epidermis of the electric wires to prevent the connection between the power connection terminal and the core wire from being torn off. See Figure 1 , conventionally, an installation hole 11 is penetrated through one end of the emission needle 10 far from the tip end, and then a fixed ring terminal 20 is arranged at the end of the electric wire. One end of the fixed ring terminal 20 has an installation ring 21 corresponding to the installation hole 11. After passing through the installation ring 21 and the installation hole 11 with a metal sleeve 30 and then riveting and fixing, the emission needle 10 and the fixed ring terminal 20 are fixedly connected. An arc-shaped metal sheet is arranged at the other end of the fixed ring terminal 20. After being bent, the arc-shaped metal sheet can wrap and clamp the epidermis of the electric wire. This connection structure of the power connection terminal has a complex structure, a large number of parts, many production and assembly processes, and a high processing cost. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this reason, one of the purposes of the present invention is to provide a connection structure of a power connection terminal with a simple structure, convenient assembly and low production cost; the second purpose is to provide a method for manufacturing the above connection structure of the power connection terminal, thereby improving the production and processing efficiency and reducing the production cost.

[0004] A connection structure of a power connection terminal according to an embodiment of the first aspect of the present invention includes: a strip-shaped metal sheet, one end of the metal sheet is provided with a needle-shaped part, the other end of the metal sheet is formed with a first wrapping piece for holding the epidermis of the electric wire tightly, and the metal sheet is formed with a second wrapping piece for holding the core wire of the electric wire tightly on one side of the first wrapping piece. Both the first wrapping piece and the second wrapping piece can be bent and then shaped to clamp the epidermis of the electric wire and the core wire of the electric wire respectively.

[0005] A connection structure of a power connection terminal according to an embodiment of the present invention has at least the following beneficial effects:

[0006] The metal sheet, the needle-shaped part, the first wrapping piece and the second wrapping piece of the above connection structure of the power connection terminal are of an integral structure. The core wire of the electric wire is clamped by the second wrapping piece to achieve electrical connection, and the epidermis of the electric wire is clamped by the first wrapping piece to prevent the metal sheet from being separated from the electric wire, eliminating the fixed ring terminal and the metal sleeve of the traditional technology, simplifying the structure, and having more convenient assembly procedures and lower production costs.

[0007] In some embodiments of the present invention, the metal sheet, the needle-shaped part, the first wrapping piece and the second wrapping piece are of an integral sheet metal structure.

[0008] In some embodiments of the present invention, both sides of the first wrapping piece along the width direction of the metal piece are bent towards the same direction to form a first installation groove with an opening direction perpendicular to the metal piece, and both sides of the second wrapping piece along the width direction of the metal piece are bent towards the same direction to form a second installation groove with an opening direction perpendicular to the metal piece, and the opening direction of the second installation groove is the same as the opening direction of the first installation groove.

[0009] In some embodiments of the present invention, the distance between the two side walls of the first wrapping piece is greater than the distance between the two side walls of the second wrapping piece, and the height dimension of the side edge of the first wrapping piece perpendicular to the metal piece is greater than the height dimension of the side edge of the second wrapping piece perpendicular to the metal piece.

[0010] In some embodiments of the present invention, convex strips extending along the width direction of the second wrapping piece are protrudingly provided on the inner side wall of the second installation groove, and at least two of the convex strips are spaced along the length direction of the metal piece for tightly pressing the core wire of the electric wire.

[0011] In some embodiments of the present invention, an identification tape close to the second wrapping piece is provided between the second wrapping piece and the needle-shaped part, and an insulating heat shrinkable tube located between the identification tape and the second wrapping piece is sleeved outside the metal piece.

[0012] In some embodiments of the present invention, the needle-shaped part is an acute-angled triangular piece consistent with the wall thickness of the metal piece, and pre-folded grooves recessed inward are provided on both side edges of the connection part between the acute-angled triangular piece and the metal piece.

[0013] A manufacturing method of the second aspect embodiment of the present invention is applied to the power connection terminal connection structure of any of the above technical solutions, and includes the following steps:

[0014] A flat sheet part is stamped on a sheet metal part. The flat sheet part includes a first horizontal strip, a second horizontal strip arranged parallel to the first horizontal strip, and a vertical strip orthogonal to the first horizontal strip and the second horizontal strip. The length dimension of the first horizontal strip is greater than the length dimension of the second horizontal strip. Convex strips extending along the length direction of the second horizontal strip are stamped and formed on the second horizontal strip. Both ends of the first horizontal strip are bent upward to form a first wrapping piece for tightly holding the skin of the electric wire, both ends of the second horizontal strip are bent upward to form a second wrapping piece for tightly holding the core wire of the electric wire, metal pieces extending the vertical strip are stamped and formed along both side edges of the vertical strip, and a needle-shaped part is stamped and formed at one end of the metal piece away from the flat sheet part.

[0015] The above manufacturing method forms the above-mentioned power connection terminal connection structure on the sheet metal part by integral stamping, which is very simple in production, eliminates the fixed-ring terminals and metal sleeves in the traditional technology, simplifies the structure, and has fewer and more convenient assembly processes, thereby improving the production and processing efficiency and reducing the production cost.

[0016] In some embodiments of the present invention, the sheet metal part is a long strip rectangular sheet metal strip. Before forming the planar sheet portion, a plurality of spaced-apart positioning hole groups are stamped along the length direction of the sheet metal strip. The planar sheet portion is provided on one side of the sheet metal strip and is located between adjacent positioning hole groups. The first transverse strip is provided at the side edge of the sheet metal strip.

[0017] In some embodiments of the present invention, a plurality of through grooves are stamped on the extension lines of the two side edges of the vertical strip and are spaced along the width direction of the sheet metal strip. There is a transverse connection strip between adjacent through grooves in the width direction of the sheet metal strip. Each transverse connection strip of the positioning hole group is provided with a positioning through hole. The plurality of through grooves spaced along the width direction of the sheet metal strip are stamped and formed one by one. After the needle-shaped portion is punched and formed on the side edge of the sheet metal strip away from the planar sheet portion, the transverse connection strip is cut off to form the metal sheet.

[0018] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0020] Figure 1 is a schematic structural diagram of an embodiment of a traditional power connection terminal connection structure;

[0021] Figure 2 is a schematic structural diagram of an embodiment of the power connection terminal connection structure of the present invention;

[0022] Figure 3 is Figure 1 a partially enlarged schematic diagram when the wire is not connected in the embodiment;

[0023] Figure 4 is a schematic diagram of the step-by-step forming of the power connection terminal connection structure of the present invention on the sheet metal strip.

[0024] Reference Signs:

[0025] Emission needle 10; mounting hole 11; fixed-ring terminal 20; mounting ring 21; metal sleeve 30; metal sheet 100; needle-shaped portion 110; first wrapping sheet 120; second wrapping sheet 130; first mounting groove 140; second mounting groove 150; rib 160; identification tape 180; pre-folded groove 190; flat sheet portion 200; first horizontal strip 210; second horizontal strip 220; vertical strip 230; sheet metal strip 300; positioning hole group 310; through groove 320; horizontal connection strip 330. Detailed implementation mode

[0026] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0027] In the description of the present invention, it should be understood that with regard to the orientation description, for example, terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0028] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0029] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See Figure 2 and Figure 3, A connection structure of a power connection terminal according to the present invention includes: a strip-shaped metal sheet 100, one end of the metal sheet 100 is provided with a needle-shaped portion 110, and the other end of the metal sheet 100 is formed with a first wrapping sheet 120 for tightly holding the outer skin of the electric wire. On one side of the first wrapping sheet 120 of the metal sheet 100, a second wrapping sheet 130 for tightly holding the core wire of the electric wire is formed. The first wrapping sheet 120 and the second wrapping sheet 130 can be bent and fixed to clamp the outer skin and the core wire of the electric wire respectively.

[0031] The metal sheet 100, the needle-shaped portion 110, the first wrapping sheet 120, and the second wrapping sheet 130 of the above power connection terminal connection structure are of an integral structure. The core wire of the electric wire is clamped by the second wrapping sheet 130 to achieve electrical connection, and the outer skin of the electric wire is clamped by the first wrapping sheet 120 to prevent the metal sheet 100 from separating from the electric wire. The fixed-ring terminal and the metal sleeve of the traditional technology are eliminated, the structure is simplified, the assembly process is more convenient, and the production cost is lower.

[0032] In some embodiments of the present invention, in order to further simplify the production and processing process, the metal sheet 100, the needle-shaped portion 110, the first wrapping sheet 120, and the second wrapping sheet 130 are of an integral sheet metal structure. Of course, in other embodiments, the metal sheet 100, the needle-shaped portion 110, the first wrapping sheet 120, and the second wrapping sheet 130 may also be of an integrally forged or integrally rolled metal structure.

[0033] See Figure 2 and Figure 3 , In some embodiments of the present invention, the two sides of the first wrapping sheet 120 along the width direction of the metal sheet 100 are bent towards the same direction to form a first installation groove 140 with an opening direction perpendicular to the metal sheet 100. The two sides of the second wrapping sheet 130 along the width direction of the metal sheet 100 are bent towards the same direction to form a second installation groove 150 with an opening direction perpendicular to the metal sheet 100. The opening direction of the second installation groove 150 is the same as the opening direction of the first installation groove 140. It can be understood that a part of the outer skin of the electric wire is located within the first installation groove 140, and the end of the core wire of the electric wire is located within the second installation groove 150. Only by bending the first wrapping sheet 120 and the second wrapping sheet 130 by a small angle can the outer skin and the core wire of the electric wire be clamped, which is beneficial to manual processing.

[0034] See Figure 3, in some embodiments of the present invention, the distance between the two side walls of the first wrapping piece 120 is greater than the distance between the two side walls of the second wrapping piece 130, and the height dimension of the side edge of the first wrapping piece 120 perpendicular to the metal piece 100 is greater than the height dimension of the side edge of the second wrapping piece 130 perpendicular to the metal piece 100, that is, the width dimension of the first wrapping piece 120 in the unfolded state is greater than the width dimension of the second wrapping piece 130 in the unfolded state. Since the diameter dimension of the outer skin of the wire is greater than the diameter dimension of the core wire of the wire, the first wrapping piece 120 forms a ring with a larger diameter dimension when holding the outer skin of the wire, and the second wrapping piece 130 forms a ring with a smaller diameter dimension when holding the core wire of the wire.

[0035] See Figure 3 , in some embodiments of the present invention, in order to enable the second wrapping piece 130 to have a greater clamping force and a more reliable clamping effect when clamping the core wire of the wire, a rib 160 extending along the width direction of the second wrapping piece 130 is convexly provided on the inner side wall of the second installation groove 150, and at least two ribs 160 are arranged at intervals along the length direction of the metal piece 100 for pressing against the core wire of the wire. Specifically, the rib 160 can be formed by stamping at the back of the metal piece 100 where the rib 160 is located, and the production and processing are relatively convenient.

[0036] See Figure 2 , in some embodiments of the present invention, an identification tape 180 close to the second wrapping piece 130 is provided between the second wrapping piece 130 and the needle-shaped part 110, and an insulating heat shrinkable tube is sleeved outside the metal piece 100 between the identification tape 180 and the second wrapping piece 130. It should be noted that in some application scenarios, it is necessary to sleeve an insulating heat shrinkable tube outside the joint of the second wrapping piece 130 and the core wire of the wire to achieve the effect of electrical insulation. The setting of the identification tape 180 can provide an indication for manual operation to ensure proper assembly and avoid the situation of improper installation.

[0037] See Figure 2 , in some embodiments of the present invention, the needle-shaped part 110 is an acute triangle piece consistent with the wall thickness of the metal piece 100, and pre-folded grooves 190 recessed inward are provided on both side edges of the connection between the acute triangle piece and the metal piece 100. It should be noted that taking a negative ion generator as an example, the needle-shaped part 110 needs to be arranged on the gas flow path, and a high-voltage current passes through the needle-shaped part 110 to ionize the nearby air, so as to gather a large number of negative ions, and the fan blows the negative ions into the surrounding air. The setting of the pre-folded grooves 190 helps the acute triangle piece to bend at a certain angle relative to the metal piece 100 so that the tip of the acute triangle piece is on the gas flow path.

[0038] See Figures 2 to 4 , the present invention also discloses a manufacturing method thereof, which is applied to the power connection terminal connection structure of any of the above technical solutions, and includes the following steps:

[0039] Stamp a flat sheet portion 200 on the sheet metal part. The flat sheet portion 200 includes a first transverse strip 210, a second transverse strip 220 arranged parallel to the first transverse strip 210, and a vertical strip 230 orthogonal to the first transverse strip 210 and the second transverse strip 220. The length dimension of the first transverse strip 210 is greater than the length dimension of the second transverse strip 220, so that the shape of the flat sheet portion 200 is an inverted "tu" shape. Stamp a rib 160 extending along the length direction of the second transverse strip 220 on the second transverse strip 220. Bend the two ends of the first transverse strip 210 upward to form a first wrapping piece 120 for tightly holding the skin of the wire. Bend the two ends of the second transverse strip 220 upward to form a second wrapping piece 130 for tightly holding the core wire of the wire. Stamp metal pieces 100 extending the vertical strip 230 along both side edges of the vertical strip 230. Stamp a needle-shaped portion 110 at one end of the metal piece 100 away from the flat sheet portion 200.

[0040] The above manufacturing method forms the above power connection terminal connection structure on the sheet metal part by means of integral stamping. The production and manufacturing are very simple, eliminating the fixed-ring terminals and metal sleeves of the traditional technology, simplifying the structure, and having fewer and more convenient assembly processes, thereby improving the production and processing efficiency and reducing the production cost.

[0041] See Figure 4, in some embodiments of the present invention, the sheet metal part is a long strip rectangular sheet metal strip 300. Before forming the planar sheet part 200, a plurality of spaced-apart positioning hole groups 310 are punched along the length direction of the sheet metal strip 300. The planar sheet part 200 is arranged on one side of the sheet metal strip 300 and is located between adjacent positioning hole groups 310. The first transverse strip 210 is arranged at the side edge of the sheet metal strip 300. A plurality of through slots 320 are punched along the width direction of the sheet metal strip 300 at the extension lines of the two side edges of the vertical strip 230. There is a transverse connecting strip 330 between adjacent through slots 320 in the width direction of the sheet metal strip 300. Each transverse connecting strip 330 of the positioning hole group 310 is provided with a positioning through hole. The plurality of through slots 320 spaced apart along the width direction of the sheet metal strip 300 are punched one by one, which is beneficial to reducing excessive stamping deformation of the sheet metal strip 300. After the needle-shaped part 110 is punched at the side edge of the sheet metal strip 300 away from the planar sheet part 200, the transverse connecting strip 330 is cut off to form the metal sheet 100. It should be noted that when using the above manufacturing method to manufacture the power connection terminal connection structure, a stamping die can be used to achieve continuous automated production. Specifically, the sheet metal strip 300 is located between the upper die and the lower die of the stamping die. The stamping die is provided with a plurality of stations along the transmission direction of the sheet metal strip 300. The upper die and the lower die are first closed to form the positioning hole group 310 on the sheet metal strip 300, and the position of the sheet metal strip 300 is positioned by the cooperation of the positioning hole group 310 and the positioning pin group of the stamping die. Then, the sheet metal strip 300 is conveyed forward by the distance of one station. The upper die and the lower die are closed again to punch and form the planar sheet part 200. Then, the sheet metal strip 300 is conveyed forward by the distance of one station multiple times to gradually form the above-mentioned first wrapping sheet 120, second wrapping sheet 130, needle-shaped part 110, through slots 320, transverse connecting strip 330, etc. The transverse connecting strip 330 and the positioning through holes always exist before the last station to ensure accurate machining of each part.

[0042] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A power connection terminal connection structure, characterized in that, Comprising: A strip-shaped metal sheet (100), one end of the metal sheet (100) is provided with a needle-shaped portion (110), the other end of the metal sheet (100) is formed with a first wrapping sheet (120) for tightly holding the skin of the electric wire, and the metal sheet (100) is formed with a second wrapping sheet (130) for tightly holding the core wire of the electric wire on one side of the first wrapping sheet (120). Both the first wrapping sheet (120) and the second wrapping sheet (130) can be bent and then fixed in shape to respectively clamp the skin of the electric wire and the core wire of the electric wire.

2. The electric connection terminal connection structure according to claim 1, characterized in that: The metal sheet (100), the needle-shaped portion (110), the first wrapping sheet (120) and the second wrapping sheet (130) are of an integral sheet metal structure.

3. The electric connection terminal connection structure according to claim 2, characterized in that: The two sides of the first wrapping sheet (120) along the width direction of the metal sheet (100) are bent towards the same direction to form a first installation groove (140) with an opening direction perpendicular to the metal sheet (100). The two sides of the second wrapping sheet (130) along the width direction of the metal sheet (100) are bent towards the same direction to form a second installation groove (150) with an opening direction perpendicular to the metal sheet (100). The opening direction of the second installation groove (150) is the same as the opening direction of the first installation groove (140).

4. The electric connection terminal connection structure according to claim 3, characterized in that: The distance between the two side walls of the first wrapping sheet (120) is greater than the distance between the two side walls of the second wrapping sheet (130). The height dimension of the side edge of the first wrapping sheet (120) perpendicular to the metal sheet (100) is greater than the height dimension of the side edge of the second wrapping sheet (130) perpendicular to the metal sheet (100).

5. The electric connection terminal connection structure according to claim 3, characterized in that: A rib (160) extending along the width direction of the second wrapping sheet (130) is convexly provided on the inner side wall of the second installation groove (150). At least two ribs (160) are arranged at intervals along the length direction of the metal sheet (100) for tightly holding the core wire of the electric wire.

6. The electric connection terminal connection structure according to claim 1, characterized in that: A marking strip (180) close to the second wrapping sheet (130) is provided between the second wrapping sheet (130) and the needle-shaped portion (110). An insulating heat shrinkable tube is sleeved outside the metal sheet (100) and is located between the marking strip (180) and the second wrapping sheet (130).

7. The electric connection terminal connection structure according to claim 1, characterized in that: The needle-shaped portion (110) is an acute-angled triangular sheet consistent with the wall thickness of the metal sheet (100). Pre-bending grooves (190) recessed inward are provided on both side edges of the connection part between the acute-angled triangular sheet and the metal sheet (100).

8. A manufacturing method, applied to the power connection terminal connection structure according to any one of claims 1-7, characterized in that, Including the following steps: A flat sheet portion (200) is stamped on a sheet metal part. The flat sheet portion (200) includes a first transverse strip (210), a second transverse strip (220) arranged parallel to the first transverse strip (210), and a vertical strip (230) orthogonal to the first transverse strip (210) and the second transverse strip (220). The length dimension of the first transverse strip (210) is greater than the length dimension of the second transverse strip (220). A convex strip (160) extending along the length direction of the second transverse strip (220) is stamped and formed on the second transverse strip (220). The two ends of the first transverse strip (210) are bent upward to form a first wrapping piece (120) for tightly holding the outer skin of an electric wire. The two ends of the second transverse strip (220) are bent upward to form a second wrapping piece (130) for tightly holding the core wire of the electric wire. Metal sheets (100) extending the vertical strip (230) are stamped and formed along both side edges of the vertical strip (230). A needle-like portion (110) is stamped and formed at one end of the metal sheet (100) away from the flat sheet portion (200).

9. The manufacturing method according to claim 8, characterized in that: The sheet metal part is a long strip rectangular sheet metal strip (300). Before forming the flat sheet portion (200), a plurality of positioning hole groups (310) arranged at intervals are stamped and formed along the length direction of the sheet metal strip (300). The flat sheet portion (200) is arranged on one side of the sheet metal strip (300) and located between adjacent positioning hole groups (310). The first transverse strip (210) is arranged at the side edge of the sheet metal strip (300).

10. The manufacturing method according to claim 9, characterized in that: A plurality of through slots (320) arranged at intervals along the width direction of the sheet metal strip (300) are stamped and formed on the extension lines of both side edges of the vertical strip (230). There is a transverse connection strip (330) between adjacent through slots (320) in the width direction of the sheet metal strip (300). Each transverse connection strip (330) of the positioning hole group (310) is provided with a positioning through hole. The plurality of through slots (320) arranged at intervals along the width direction of the sheet metal strip (300) are stamped and formed one by one. After the needle-like portion (110) is punched and formed at the side edge of the sheet metal strip (300) away from the flat sheet portion (200), the transverse connection strip (330) is cut off to form the metal sheet (100).

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