High current flat blade terminal

Abstract

The utility model belongs to the technical field of electric connector, especially for high current flat plug terminal, including the inner copper sheet, outer copper sheet and clamping piece that all are in the form of tooth row at the top, two outer copper sheets are located at the outside of two inner copper sheets, two clamping pieces are located at the outside of two outer copper sheets. The utility model discloses through clamping piece guarantee possesses enough contact pressure, and through the contact surface at the top of copper sheet to the flat handle of beating, make this terminal realizes quick plug -in under the higher current scene, therefore more easily in the terminal of high current scene but the plug -in demand of slightly high application.

Description

Technical Field

[0001] This utility model relates to the field of electrical connector technology, specifically to high-current flat plug terminals. Background Technology

[0002] For plug-in terminals in high-current scenarios, in order to improve current carrying capacity and plug-in stability, existing technologies use multiple layers of copper sheets stacked together, with both inner and outer copper sheets in a toothed shape. The top teeth are arranged in an interlaced manner and aligned on the same plane. This allows the surface to be pressed against multiple contact points after the male terminal is inserted, thereby reducing contact resistance. For example, the high-voltage high-current terminal disclosed in Chinese Utility Model Patent No. CN222915193U.

[0003] According to Holm's contact resistance theory, contact resistance is inversely proportional to contact pressure. Therefore, in high-current scenarios, a greater insertion and extraction force is generally required to quickly insert and remove connector terminals. However, when dealing with manual maintenance switches (MSDs) of 500A and above, insertion and extraction become difficult, affecting the operating efficiency of the MSD and resulting in a short insertion and extraction life.

[0004] Therefore, this application proposes a flat plug-in female terminal structure that facilitates quick insertion and removal in high-current scenarios. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a high-current flat plug terminal, which solves the problem of difficulty in quickly inserting and removing existing flat plug terminals in high-current scenarios.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-current flat terminal, comprising inner copper sheets, outer copper sheets, and clamping pieces, each with a toothed top, wherein two outer copper sheets are disposed outside the two inner copper sheets, and two clamping pieces are disposed outside the two outer copper sheets. The inner copper sheet includes a first clamping part and a first toothed part connected together. The two first toothed parts are inclined in opposite directions to form a slot for the male terminal to be connected. The upper part of the two first toothed parts protrudes in opposite directions near the top to form a first contact surface. The outer copper sheet includes a second clamping part and a second toothed part connected together. The upper part of the second toothed part protrudes in opposite directions near the top to form a second contact surface. The second contact surface and the first contact surface are arranged alternately. The protruding positions of the second contact surface and the first contact surface are aligned and both are flattened. The clamping piece includes a third clamping part and a third toothed part. The upper part of the third toothed part protrudes in opposite directions near the top to form a pressing part. The pressing part is aligned with the concave parts on the outer copper sheet and the inner copper sheet that are opposite to the protrusion, and the concave positions of the concave parts are aligned. The clamping plate is made of a material that is harder and more elastic than the inner and outer copper plates.

[0007] Preferably, both the inner and outer copper sheets are made of copper, and the clamping plates are made of 304 stainless steel.

[0008] Preferably, the bottom of the first clamping part is bent into a mounting part, and the mounting part is provided with a mounting hole.

[0009] Preferably, the tooth gap of the first tooth row is greater than the tooth thickness of the second tooth row, and the tooth gap of the second tooth row is greater than the tooth thickness of the first tooth row.

[0010] Preferably, the tooth gap of the first tooth row is equal to the tooth gap of the second tooth row, which is greater than the tooth thickness of the first tooth row, which is equal to the tooth thickness of the second tooth row. The tooth gap of the first tooth row is 2.3 to 2.6 mm, and the tooth thickness of the first tooth row is 1.9 to 2.2 mm.

[0011] Preferably, the inner copper sheet, the outer copper sheet, and the clamping sheet are all integrally formed by bending and stamping, and the inner copper sheet, the outer copper sheet, and the clamping sheet are fixed together by rivets.

[0012] Preferably, the first contact surface and the second contact surface are silver-plated.

[0013] Preferably, the entire surface of the inner copper sheet near the first contact surface is silver-plated, and the entire surface of the outer copper sheet near the second contact surface is silver-plated.

[0014] Preferably, the included angle of the pressing part is smaller than the included angle of the concave part.

[0015] Preferably, limiting blocks are provided on both sides of the narrow edge of the first clamping part, and alignment grooves that cooperate with the limiting blocks are provided on both sides of the narrow edge of the second clamping part and the third clamping part.

[0016] Compared with the prior art, this utility model provides a high-current flat terminal, which has the following advantages: This high-current flat terminal ensures sufficient contact pressure through clamping plates and flattens the contact surface at the top of the copper sheet, enabling rapid insertion and removal in high-current scenarios. Therefore, it is more likely to be used in terminals with slightly higher insertion and removal requirements in high-current scenarios. Attached Figure Description

[0017] Figure 1 This is a three-dimensional assembly diagram of the high-current flat terminal block; Figure 2 This is a three-dimensional exploded view of the high-current flat terminal block; Figure 3 for Figure 1The left view; Figure 4 A schematic diagram showing the contact after the clamping piece presses against the inner or outer copper sheet; Figure 5 This is a left view of the inner copper plate in this high-current flat terminal block; Figure 6 This is a front view of the inner copper plate in this high-current flat terminal; Figure 7 This is a left view of the outer copper plate in this high-current flat terminal; Figure 8 This is a front view of the outer copper plate in this high-current flat terminal; Figure 9 This is a left view of the clamping piece in this high-current flat terminal block; Figure 10 This is a front view of the clamping piece in this high-current flat terminal block.

[0018] In the diagram: A, male terminal; A1, insert; 1. Inner copper sheet; 11. First clamping part; 111. Limiting block; 12. First toothed row part; 121. First contact surface; 13. Mounting part; 131. Mounting hole; 2. Outer copper sheet; 21. Second clamping part; 22. Second toothed part; 221. Second contact surface; 3. Clamping plate; 31. Three-piece clamping part; 32. Third toothed row part; 321. Pressing part; 4. Slot; 5. Rivet; R1, raised area; R2, recessed area; C, alignment groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example 1: Please see Figure 1-10 The present invention provides the following technical solution: a high-current flat plug terminal, including an inner copper sheet 1, an outer copper sheet 2 and a clamping piece 3, both of which have teeth at the top. The two outer copper sheets 2 are located outside the two inner copper sheets 1, and the two clamping pieces 3 are located outside the two outer copper sheets 2. The inner copper sheet 1 includes a first clamping part 11 and a first toothed part 12 connected together. The two first toothed parts 12 are inclined in opposite directions to form a slot 4 for the male terminal A to be connected. The upper part of the two first toothed parts 12 protrudes in opposite directions near the top to form a first contact surface 121. The outer copper sheet 2 includes a second clamping part 21 and a second toothed part 22 connected together. The upper part of the second toothed part 22 protrudes in opposite directions near the top to form a second contact surface 221. The second contact surface 221 and the first contact surface 121 are arranged alternately. The protruding positions of the second contact surface 221 and the first contact surface 121 are aligned and both are flattened. The clamping piece 3 includes a third clamping part 31 and a third toothed part 32. The upper part of the third toothed part 32 protrudes in opposite directions near the top to form a pressing part 321. The pressing part 321 is aligned with the concave part R2 on the outer copper piece 2 and the inner copper piece 1 that is opposite to the protrusion R1, and the concave positions of the concave parts R2 are aligned. The clamping piece 3 is made of a material that is harder and more elastic than the inner copper piece 1 and the outer copper piece 2.

[0021] As an optional implementation of this utility model, during assembly, the two inner copper sheets 1 are tightly attached to the first clamping part 11, the second clamping parts 21 of the two outer copper sheets 2 are tightly attached to the two first clamping parts 11 from the outside, and the third clamping parts 31 of the two clamping pieces 3 are tightly attached to the two second clamping parts 21 from the outside. Then, they are fixed together by rivets 5 or other means through each clamping part. At this time, the teeth on the first toothed part 12 and the second toothed part 22 are arranged alternately. The protrusion R1 and concave R2 of the first contact surface 121 on the left side and the second contact surface 221 are aligned. The protrusion R1 and concave R2 of the first contact surface 121 on the right side and the second contact surface 221 are aligned, forming a slot 4 for the male terminal A to be connected. At the same time, the pressing part 321 on the third toothed part 32 abuts against the concave R2 of each inner copper sheet 1 and outer copper sheet 2 to form pressure contact.

[0022] In use, when the male terminal A's insert A1 is inserted into the slot 4, the surface of insert A1 contacts each of the first contact surfaces 121 and the second contact surfaces 221. Due to the elastic support of the clamping piece 3 on the inner copper piece 1 and the outer copper piece 2, the insertion firmness of insert A1 is maintained, thereby providing sufficient contact pressure, reducing contact resistance, meeting the overcurrent capacity requirements in high-current scenarios, and avoiding serious overheating problems. In addition, after the flattening treatment (flattening treatment is existing technology, i.e., leveling the surface), the first contact surfaces 121 and 221 are made more stable. 121. The second contact surface 221 has a larger contact stroke and a larger contact area with the insert A1, resulting in lower contact resistance. This also reduces the local pressure on the insert A1 from the entire slot 4 (making it easier to overcome the elastic deformation of the clamping piece 3 when the male terminal A is connected). Furthermore, both the first contact surface 121 and the second contact surface 221 are located near the top of the inner copper piece 1 and the outer copper piece 2, thus resulting in a larger lever arm and reduced insertion and extraction force. This makes it easier to apply to terminals with high current requirements but slightly higher insertion and extraction demands, such as manual maintenance switches (MSDs) of 500A and above.

[0023] Furthermore, by applying pressure through the clamping plate 3, the drawback of individual copper plates easily falling into metal fatigue can be avoided.

[0024] By adopting this implementation method, sufficient contact pressure is ensured by the clamping piece 3, and the contact surface at the top of the copper sheet is flattened, so that the terminal can be quickly inserted and removed in high current scenarios. Therefore, it is easier to apply to terminals with slightly higher insertion and removal requirements in high current scenarios.

[0025] Example 2: Please see Figure 1-10 The present invention provides the following technical solution: a high-current flat plug terminal, including an inner copper sheet 1, an outer copper sheet 2 and a clamping piece 3, both of which have teeth at the top. The two outer copper sheets 2 are located outside the two inner copper sheets 1, and the two clamping pieces 3 are located outside the two outer copper sheets 2. The inner copper sheet 1 includes a first clamping part 11 and a first toothed part 12 connected together. The two first toothed parts 12 are inclined in opposite directions to form a slot 4 for the male terminal A to be connected. The upper part of the two first toothed parts 12 protrudes in opposite directions near the top to form a first contact surface 121. The outer copper sheet 2 includes a second clamping part 21 and a second toothed part 22 connected together. The upper part of the second toothed part 22 protrudes in opposite directions near the top to form a second contact surface 221. The second contact surface 221 and the first contact surface 121 are arranged alternately. The protruding positions of the second contact surface 221 and the first contact surface 121 are aligned and both are flattened. The clamping piece 3 includes a third clamping part 31 and a third toothed part 32. The upper part of the third toothed part 32 protrudes in opposite directions near the top to form a pressing part 321. The pressing part 321 is aligned with the concave part R2 on the outer copper piece 2 and the inner copper piece 1 that is opposite to the protrusion R1, and the concave positions of the concave parts R2 are aligned. The included angle of the pressing part 321 is smaller than the included angle of the concave part R2. The inner copper sheet 1, the outer copper sheet 2, and the clamping sheet 3 are all made by bending and stamping as a whole. The inner copper sheet 1, the outer copper sheet 2, and the clamping sheet 3 are fixed together by rivets 5. Both the inner copper sheet 1 and the outer copper sheet 2 are made of copper, and the clamping sheet 3 is made of 304 stainless steel.

[0026] As an optional implementation of this utility model, compared with embodiment 1, the materials of the inner copper sheet 1, the outer copper sheet 2 and the clamping piece 3 are further defined, and the clamping position of the clamping piece 3 on the inner copper sheet 1 and the outer copper sheet 2 is defined to ensure that the clamping force on each copper sheet is consistent and to avoid the occurrence of unstable contact due to different local pressure.

[0027] Furthermore, the bottom of the first clamping part 11 is bent into a mounting part 13, and a mounting hole 131 is provided on the mounting part 13.

[0028] As an optional implementation of this utility model, the mounting hole 131 is used for mounting the terminal on the connector insulating shell. Of course, in the prior art, threaded holes are generally used, so the mounting hole 131 can be regarded as a threaded hole.

[0029] Furthermore, the tooth gap of the first tooth row 12 is equal to the tooth gap of the second tooth row 22, and the tooth thickness of the first tooth row 12 is equal to the tooth thickness of the second tooth row 22. The tooth gap of the first tooth row 12 is 2.3 to 2.6 mm, and the tooth thickness of the first tooth row 12 is 1.9 to 2.2 mm.

[0030] As an optional implementation of this utility model, by further defining the specifications of each tooth on each tooth row, it is ensured that after the outer copper sheet 2 and the inner copper sheet 1 are assembled, the adjacent teeth do not connect with each other, thereby avoiding abnormal non-designed current paths and ensuring uniform current distribution.

[0031] Furthermore, the entire surface of the inner copper sheet 1 near the first contact surface 121 is silver-plated, and the entire surface of the outer copper sheet 2 near the second contact surface 221 is silver-plated.

[0032] As an optional implementation of this utility model, silver plating can reduce contact resistance and ensure overcurrent capability in high current scenarios.

[0033] like Figure 3-10As shown, the first clamping part 11 has a limiting block 111 on both sides of the narrow edge, and the second clamping part 21 and the third clamping part 31 have an alignment groove C on both sides of the narrow edge that cooperates with the limiting block 111.

[0034] As an optional implementation of this utility model, the cooperation between the limiting block 111 and the alignment groove C not only makes it easier to assemble and align the terminal, but also ensures that there will be no contact between adjacent teeth after assembly.

[0035] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-current flat terminal block, comprising inner copper plates, outer copper plates, and clamping plates, each with a toothed tip, wherein two outer copper plates are disposed outside two inner copper plates, and two clamping plates are disposed outside two outer copper plates, wherein: The inner copper sheet includes a first clamping part and a first toothed part connected together. The two first toothed parts are inclined in opposite directions to form a slot for the male terminal to be connected. The upper part of the two first toothed parts protrudes in opposite directions near the top to form a first contact surface. The outer copper sheet includes a second clamping part and a second toothed part connected together. The upper part of the second toothed part protrudes in opposite directions near the top to form a second contact surface. The second contact surface and the first contact surface are arranged alternately. The protruding positions of the second contact surface and the first contact surface are aligned and both are flattened. The clamping piece includes a third clamping part and a third toothed part. The upper part of the third toothed part protrudes in opposite directions near the top to form a pressing part. The pressing part is aligned with the concave parts on the outer copper sheet and the inner copper sheet that are opposite to the protrusion, and the concave positions of the concave parts are aligned. The clamping plate is made of a material that is harder and more elastic than the inner and outer copper plates.

2. The high-current flat terminal according to claim 1, characterized in that, Both the inner and outer copper sheets are made of copper, and the clamping plates are made of 304 stainless steel.

3. The high-current flat terminal according to claim 1, characterized in that, The bottom of the first clamping part is bent to form a mounting part, and the mounting part is provided with mounting holes.

4. The high-current flat terminal according to claim 1, characterized in that, The tooth gap of the first tooth row is greater than the tooth thickness of the second tooth row, and the tooth gap of the second tooth row is greater than the tooth thickness of the first tooth row.

5. The high-current flat terminal according to claim 4, characterized in that, The tooth gap of the first tooth row is equal to the tooth gap of the second tooth row, which is greater than the tooth thickness of the first tooth row, which is equal to the tooth thickness of the second tooth row. The tooth gap of the first tooth row is 2.3 to 2.6 mm, and the tooth thickness of the first tooth row is 1.9 to 2.2 mm.

6. The high-current flat terminal according to claim 1, characterized in that, The inner copper sheet, outer copper sheet, and clamping sheet are all integrally formed by bending and stamping, and are fixed together by rivets.

7. The high-current flat terminal according to claim 1, characterized in that, The first and second contact surfaces are silver-plated.

8. The high-current flat terminal according to claim 7, characterized in that, The entire surface of the inner copper sheet near the first contact surface is silver-plated, and the entire surface of the outer copper sheet near the second contact surface is silver-plated.

9. The high-current flat terminal according to claim 1, characterized in that, The included angle of the pressing part is smaller than the included angle of the concave part.

10. The high-current flat terminal according to claim 1, characterized in that, Limiting blocks are provided on both sides of the narrow edge of the first clamping part, and alignment grooves that cooperate with the limiting blocks are provided on both sides of the narrow edge of the second and third clamping parts.

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