Threaded European style copper wiring terminal

Abstract

A free end of a basic section of the threaded European-style copper wiring terminal is concaved inwards to form a frustum-shaped concave hole, the outer side of the frustum-shaped concave hole is a large-diameter end, and the outer circumference of a frustum-shaped section is combined with the inner circumference of the frustum-shaped concave hole. The end, close to the threaded section, of the frustum-shaped section is connected with the end, away from the plate-shaped section, of the base section through friction stir welding. According to the threaded European-style copper wiring terminal provided by the utility model, the binding post end is set to be formed by cold heading, so that a large number of shaping processing processes are omitted, the threaded end can be formed directly by cold heading or after auxiliary shaping, and a large number of shaping processing processes are also omitted; the connecting parts of the threaded end and the binding post end are arranged to be frustum-shaped, so that the combination tightness between the threaded end and the binding post end is improved, the frustum-shaped section and the base section are connected in a friction stir welding mode, the structural strength is improved, and meanwhile batch processing is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of terminal structures, and particularly relates to a threaded European copper terminal. Background Art

[0002] European terminals are devices used for electrical connections, usually used in industrial automation, power systems, and electronic devices. It is a modular terminal, mainly used to connect wires to electrical devices or circuits, while providing safe and reliable electrical contacts. European terminals have various different structural forms, generally including a terminal end for connecting a terminal post and a wire connection end for connecting a cable.

[0003] Considering that it is difficult to achieve one-time cold heading forming of threaded European copper terminals under some dimensional conditions, especially when copper and aluminum materials are used at both ends to form a transition, the processing process of the entire terminal is more complex. In some scenarios, the length dimension of the European terminal can reach about ten centimeters. Then, the entire processing process often involves friction welding, preliminary forming, and final shaping processes, resulting in low processing efficiency and high production costs. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a threaded European copper terminal, aiming to solve the problems of low processing efficiency and high production costs caused by the friction welding, preliminary forming, and final shaping processes often involved in the processing of large-sized European terminals.

[0005] To achieve the above purpose, the utility model provides a threaded European copper terminal, including:

[0006] A threaded end, which includes a threaded section, a cylindrical section, and a frustum-shaped section connected in sequence in the length direction. Among them, the free end of the frustum-shaped section is the small-diameter end;

[0007] A terminal post end, including a base section and a plate-shaped section connected to each other. The base section is overall frustum-shaped, the plate-shaped section is overall plate-shaped, a through hole is penetrated in the thickness direction at one end of the plate-shaped section far from the base section, a frustum-shaped concave hole is formed by concave inward at the free end of the base section, the outer side of the frustum-shaped concave hole is the large-diameter end, the outer circumference of the frustum-shaped section forms a combination with the inner circumference of the frustum-shaped concave hole, and one end of the frustum-shaped section near the threaded section is connected to one end of the base section far from the plate-shaped section by friction stir welding;

[0008] Among them, the terminal post end is cold heading formed, and one of the threaded end and the terminal post end is made of aluminum material and the other is made of copper material.

[0009] Further, the taper angle of the frustum-shaped section is 0.1 to 0.2 degrees larger than the taper angle of the frustum-shaped concave hole, thereby forming an interference fit.

[0010] Further, the taper angle of the frustum-shaped section is 0.3 to 1 degree larger than the taper angle of the frustum-shaped concave hole, thereby forming an interference fit, and a friction welding joint is formed between the outer periphery of the frustum-shaped section and the inner periphery of the frustum-shaped concave hole.

[0011] Further, when the threaded end is connected to the terminal end, a clearance fit is formed in the length direction between the top end of the frustum-shaped section and the bottom end of the frustum-shaped concave hole.

[0012] Further, the threaded end is formed by cold heading.

[0013] Further, a plurality of clamping platforms are arranged on the outer periphery of the cylindrical section.

[0014] Further, the number of the clamping platforms is three, and they are evenly arranged in a circumferential direction.

[0015] Further, the taper angles of the frustum-shaped section and the frustum-shaped concave hole are between 3 and 15 degrees.

[0016] Further, the length of the frustum-shaped concave hole is 0.5 to 0.7 times the length of the base section.

[0017] Further, the diameter of one end of the frustum-shaped section near the threaded section is 0.8 to 0.9 times the diameter of the end of the base section far from the plate-shaped section.

[0018] For the threaded European copper terminal provided by the present utility model, setting the terminal end to be formed by cold heading eliminates a large number of shaping processes. The threaded end can also be formed directly by cold heading or after auxiliary shaping, which also eliminates a large number of shaping processes. The connection parts between the threaded end and the terminal end are both set to be frustum-shaped, thereby improving the tightness of the connection between the two. The frustum-shaped section and the base section are connected by friction stir welding. While the structural strength is improved, it is also convenient for batch processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the threaded European copper terminal according to the first embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of the threaded end in the threaded European copper terminal according to the first embodiment of the present utility model;

[0021] Figure 3 is a schematic diagram of the terminal end in the threaded European copper terminal according to the first embodiment of the present utility model;

[0022] Figure 4 It is a cross-sectional view of a threaded European copper terminal block of the first embodiment of the present utility model;

[0023] Figure 5 It is a schematic diagram of the threaded end of a threaded European copper terminal block of the second embodiment of the present utility model.

[0024] Reference numerals: 100 - threaded end, 110 - threaded section, 120 - cylindrical section, 121 - clamping platform, 130 - frustum-shaped section, 200 - terminal post end, 210 - base section, 211 - frustum-shaped concave hole, 220 - plate-shaped section, 221 - through hole.

[0025] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0026] It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0027] Those skilled in the art of the present technology can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the", "above-mentioned" and "this" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present utility model means the presence of the described features, integers, steps, operations, elements, units, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components and / or their groups. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more related listed items.

[0028] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the art to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as here.

[0029] Referring to Figures 1 to 5 , in an embodiment of the present utility model, a threaded European copper terminal block includes:

[0030] The threaded end 100 includes, in the length direction, a threaded section 110, a cylindrical section 120, and a frustum-shaped section 130 that are sequentially connected. Among them, the free end of the frustum-shaped section 130 is the small-diameter end;

[0031] The terminal end 200 includes a base section 210 and a plate-shaped section 220 that are connected to each other. The base section 210 is integrally frustum-shaped, the plate-shaped section 220 is integrally plate-shaped, and a through hole 221 is penetrated in the thickness direction at one end of the plate-shaped section 220 away from the base section 210. A frustum-shaped concave hole 211 is formed by inward concavity at the free end of the base section 210. The outer side of the frustum-shaped concave hole 211 is the large-diameter end. The outer circumference of the frustum-shaped section 130 forms a combination with the inner circumference of the frustum-shaped concave hole 211. One end of the frustum-shaped section 130 near the threaded section 110 is connected to one end of the base section 210 away from the plate-shaped section 220 by friction stir welding;

[0032] Among them, the terminal end 200 is formed by cold heading. One of the threaded end 100 and the terminal end 200 is made of aluminum and the other is made of copper.

[0033] In the prior art, the length dimension of the European-style terminal can reach about ten centimeters. Then, the entire processing process often involves friction welding, preliminary forming, and final shaping processes, resulting in problems of low processing efficiency and high production cost.

[0034] The threaded European-style copper terminal of the present utility model includes a threaded end 100 and a terminal end 200.

[0035] The threaded end 100 includes, in the length direction, a threaded section 110, a cylindrical section 120, and a frustum-shaped section 130 that are sequentially connected. The threaded end 100 as a whole can be formed by cold heading, or a cold-heading blank is formed and then the threaded section 110 is machined by a machining center. The free end of the frustum-shaped section 130 is the small-diameter end, providing a basis for subsequent installation.

[0036] The terminal end 200 includes a base section 210 and a plate-shaped section 220 that are connected to each other. The base section 210 is generally frustum-shaped as a whole, and the plate-shaped section 220 is generally plate-shaped as a whole. A through hole 221 is penetrated in the thickness direction at one end of the plate-shaped section 220 away from the base section 210. The through hole 221 is the connection basis of the terminal, thereby realizing electrical connection. A frustum-shaped concave hole 211 is formed by inwards concaving at the free end of the base section 210. The outer side of the frustum-shaped concave hole 211 is the large-diameter end. The outer circumference of the frustum-shaped section 130 is combined with the inner circumference of the frustum-shaped concave hole 211. The combination method between the frustum-shaped section 130 and the frustum-shaped concave hole 211 in the circumferential direction can be socket connection, elastic socket connection, friction welding, etc. One end of the frustum-shaped section 130 near the threaded section 110 is connected to one end of the base section 210 away from the plate-shaped section 220 by friction stir welding. The connection between the frustum-shaped section 130 and the base section 210 is realized through friction stir welding, and then a connection is formed between the threaded end 100 and the terminal end 200. A ring-shaped connection structure 300 is formed between the frustum-shaped section 130 and the base section 210 by means of friction stir welding. While strengthening the structural connection in the above process, it is also convenient to realize batch processing. For example, a plurality of combined threaded ends 100 and terminal ends 200 are arranged side by side, and the friction stir welding process is sequentially completed.

[0037] The terminal end 200 is cold heading formed, thereby eliminating a large number of sizing processes. One of the threaded end 100 and the terminal end 200 is made of aluminum material and the other is made of copper material, which is specifically selected according to the actual use scenario.

[0038] In summary, setting the terminal end 200 to be cold heading formed eliminates a large number of sizing processes. The threaded end 100 can also be directly cold headed or formed after assisted sizing, which also eliminates a large number of sizing processes. The connection parts between the threaded end 100 and the terminal end 200 are both set to be frustum-shaped, thereby improving the combination tightness between the two. The frustum-shaped section 130 and the base section 210 are connected by means of friction stir welding. While the structural strength is improved, it is also convenient for batch processing.

[0039] In one embodiment, the taper angle of the frustum-shaped section 130 is 0.1 to 0.2 degrees larger than the taper angle of the frustum-shaped concave hole 211 to form an interference fit.

[0040] In this embodiment, by restricting the taper angle of the frustum-shaped section 130 and the taper angle of the frustum-shaped concave hole 211, during the combination process, the matching degree between the two can be improved through structural deformation, and finally the combination can be fixed by external friction stir welding.

[0041] In one embodiment, the taper angle of the frustum-shaped segment 130 is 0.3 to 1 degree greater than the taper angle of the frustum-shaped recessed hole 211 , thereby forming an interference fit. The outer periphery of the frustum-shaped segment 130 and the inner periphery of the frustum-shaped recessed hole 211 are friction-welded.

[0042] In this embodiment, the frustum-shaped segment 130 is friction-welded to the frustum-shaped recessed hole 211 in the circumferential direction. As a result, the structural strength of the threaded European-style copper terminal is enhanced, and the possibility of electrochemical corrosion between the frustum-shaped segment 130 and the frustum-shaped recessed hole 211 is also reduced.

[0043] In one embodiment, when the threaded end 100 is connected to the terminal end 200 , a top end of the frustum-shaped segment 130 and a bottom end of the frustum-shaped recessed hole 211 form a clearance fit in the length direction.

[0044] In this embodiment, the top of the frustum-shaped segment 130 is configured to have a clearance fit with the frustum-shaped recess 211. This allows the frustum-shaped segment 130 and the frustum-shaped recess 211 to be joined circumferentially without interference in the longitudinal direction. In a typical configuration, the gap between the top of the frustum-shaped segment 130 and the frustum-shaped recess 211 is 1 to 2 mm.

[0045] In one embodiment, the threaded end 100 is formed by cold heading.

[0046] In this embodiment, the entire threaded end 100 is formed by cold heading, thereby eliminating the process of lathe processing the threaded section 110 and improving processing efficiency. For processing accuracy, the threaded end 100 can be subjected to certain appearance finishing after cold heading.

[0047] Reference Figure 5 In one embodiment, a plurality of clamping platforms 121 are provided on the outer circumference of the cylindrical section 120 .

[0048] In this embodiment, multiple clamping platforms 121 are machined on the outer circumference of the cylindrical section 120 to facilitate the machining of the threaded section 110. For example, three clamping platforms 121 are provided and spaced 120 degrees apart to provide a clamping base for the chuck of a lathe.

[0049] Reference Figure 5 In one embodiment, the number of the clamping platforms 121 is three and they are evenly distributed around the periphery.

[0050] In this embodiment, there are three clamping platforms 121 , which are suitable for most current lathe chucks and provide convenience for clamping the threaded end 100 .

[0051] In one embodiment, the taper angle of the frustum-shaped section 130 and the taper angle of the frustum-shaped concave hole 211 are between 3 and 15 degrees.

[0052] In this embodiment, by restricting the taper angles of the frustum-shaped section 130 and the frustum-shaped concave hole 211, the bonding area between the two is increased.

[0053] In one embodiment, the length of the frustum-shaped concave hole 211 is 0.5 to 0.7 times the length of the base section 210.

[0054] In this embodiment, by restricting the length of the frustum-shaped concave hole 211, the bonding strength between the threaded end 100 and the terminal end 200 can be improved.

[0055] In one embodiment, the diameter of the end of the frustum-shaped section 130 near the threaded section 110 is 0.8 to 0.9 times the diameter of the end of the base section 210 away from the plate-shaped section 220.

[0056] In this embodiment, by increasing the structural dimensions of the frustum-shaped section 130, a basis for improving the bonding strength between the two is provided.

[0057] In summary, for the threaded European-style copper terminal provided by the present utility model, the terminal end 200 is set to be cold-heading formed, eliminating a large number of shaping processes. The threaded end 100 can also be directly formed by cold-heading or formed after assisted shaping, also eliminating a large number of shaping processes. The connection parts between the threaded end 100 and the terminal end 200 are all set to be frustum-shaped, thereby improving the bonding tightness between the two. The frustum-shaped section 130 and the base section 210 are connected by friction stir welding. While the structural strength is improved, it is also convenient for batch processing.

[0058] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A threaded European-style copper terminal block, characterized in that, Comprising: A threaded end (100) which includes, in the length direction, a threaded section (110), a cylindrical section (120), and a frustum-shaped section (130) connected in sequence, wherein the free end of the frustum-shaped section (130) is the small-diameter end; A terminal end (200) which includes a base section (210) and a plate-shaped section (220) connected to each other. The base section (210) is integrally frustum-shaped, the plate-shaped section (220) is integrally plate-shaped, and a through hole (221) is penetrated in the thickness direction at one end of the plate-shaped section (220) away from the base section (210). A frustum-shaped concave hole (211) is formed by inward concavity at the free end of the base section (210). The outer side of the frustum-shaped concave hole (211) is the large-diameter end. The outer circumference of the frustum-shaped section (130) forms a combination with the inner circumference of the frustum-shaped concave hole (211). One end of the frustum-shaped section (130) near the threaded section (110) is connected to one end of the base section (210) away from the plate-shaped section (220) by friction stir welding; Wherein, the terminal end (200) is formed by cold heading, and one of the threaded end (100) and the terminal end (200) is made of aluminum material and the other is made of copper material.

2. The threaded European copper terminal according to claim 1, characterized in that, The taper angle of the frustum-shaped section (130) is 0.1 to 0.2 degrees larger than the taper angle of the frustum-shaped concave hole (211) so as to form an interference fit.

3. The threaded European copper terminal according to claim 1, characterized in that, The taper angle of the frustum-shaped section (130) is 0.3 to 1 degree larger than the taper angle of the frustum-shaped concave hole (211), so as to form an interference fit. The outer circumference of the frustum-shaped section (130) forms a friction welding combination with the inner circumference of the frustum-shaped concave hole (211).

4. The threaded European copper terminal according to claim 3, characterized in that, When the threaded end (100) is connected to the terminal end (200), the top end of the frustum-shaped section (130) and the bottom end of the frustum-shaped concave hole (211) form a clearance fit in the length direction.

5. The threaded European copper terminal according to claim 1, characterized in that, The threaded end (100) is formed by cold heading.

6. The threaded European copper terminal according to claim 1, characterized in that A plurality of clamping platforms (121) are arranged on the outer circumference of the cylindrical section (120).

7. The threaded European copper terminal according to claim 6, characterized in that, The number of the clamping platforms (121) is three, and they are evenly arranged in a circumferential manner.

8. The threaded European copper terminal according to any one of claims 1 to 7, characterized in that, The taper angles of the frustum-shaped section (130) and the frustum-shaped concave hole (211) are between 3 and 15 degrees.

9. The threaded European copper terminal according to any one of claims 1 to 7, characterized in that, The length of the frustum-shaped concave hole (211) is 0.5 to 0.7 times the length of the base section (210).

10. The threaded European copper terminal according to any one of claims 1 to 7, characterized in that, The diameter of one end of the frustum-shaped section (130) near the threaded section (110) is 0.8 to 0.9 times the diameter of one end of the base section (210) away from the plate-shaped section (220).

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