Terminal retaining sleeve for electrical connectors

Abstract

This utility model relates to a wire end terminal fixing sleeve for an electrical connector. The terminal fixing sleeve body includes an upper fixing part, an intermediate connecting part, and a threaded connecting part. The inner cavity includes a first through hole for the wire to pass through, a second through hole for the riveting end of the conductive terminal and the wire to pass through together, and a frustum cavity that connects the first through hole and the second through hole respectively. The first through hole, the frustum cavity, and the second through hole are arranged from top to bottom. The inner diameter of the first through hole is smaller than the inner diameter of the second through hole, and the frustum cavity has a structure that is smaller at the top and larger at the bottom. The upper part of the upper fixing part is recessed with an annular groove along its circumference. This prevents the riveting process from shaking and affecting the riveting. The frustum cavity increases the contact area between the riveting end and the wire and the terminal fixing sleeve body after riveting, thereby greatly increasing their stability and reliability after assembly. Moreover, it facilitates the subsequent assembly of the terminal fixing sleeve body.

Description

Technical Field

[0001] This utility model relates to the technical field of wire tail terminal fixing sleeves for electrical connectors, and in particular to a wire tail terminal fixing sleeve for electrical connectors. Background Technology

[0002] Existing high-current electrical connectors used in server racks generally consist of male and female connectors. These connectors are separate units, making them difficult to disassemble, resulting in poor positioning stability, low assembly efficiency, and low assembly quality. If a defective product is found or a part is damaged during use, the entire male and female connectors must be replaced, which is inconvenient for maintenance and replacement. Furthermore, existing male and female connectors are multi-pin type, hindering partial replacement and leading to waste.

[0003] Later, a robust, detachable single-pin high-current electrical connector and its male and female connectors appeared, with an announcement date of November 5, 2019. This disclosure included a male connector and a female connector; the male connector included a first connector body, a first conductive terminal, and a first terminal retaining sleeve; the first connector body had a first mounting cavity, open at both ends, and the inner wall of the first mounting cavity had a first internal thread; the first conductive terminal had a first insertion end and a first rivet end at both ends; the outer periphery of the first terminal retaining sleeve had a first external thread, the first conductive terminal was detachably inserted into the first mounting cavity, and the first terminal retaining sleeve was detachably inserted into the first mounting cavity; the first external thread adapted to the first internal thread, so that: the first conductive terminal was constrained by the first terminal retaining sleeve and the first connector body in two directions along the axis of the insertion direction, respectively. It has the following defects: the first terminal fixing sleeve has only a single inner diameter cavity, which causes the wire to wobble during the riveting process, thus affecting the riveting. In addition, the contact area between the riveted wire end and the wire and the terminal fixing sleeve body after riveting is small, affecting its stability and reliability after assembly.

[0004] Therefore, in this utility model patent application, the applicant has carefully researched and developed a wire tail terminal fixing sleeve for electrical connectors to solve the above problems. Utility Model Content

[0005] This utility model addresses the shortcomings of the existing technology mentioned above. Its main purpose is to provide a wire end terminal fixing sleeve for electrical connectors, which avoids shaking during the riveting process and thus affects the riveting. The frustum cavity increases the contact area between the riveted wire end and the wire and the terminal fixing sleeve body after riveting, thereby greatly increasing their stability and reliability after assembly. Moreover, it facilitates the subsequent assembly of the terminal fixing sleeve body.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A terminal retaining sleeve for an electrical connector includes a terminal retaining sleeve body, the outer periphery of which is provided with external threads, and the terminal retaining sleeve body has an inner cavity with open upper and lower ends.

[0008] The terminal fixing sleeve body includes an upper fixing part, an intermediate connecting part and a threaded connecting part connected from top to bottom;

[0009] The external thread is formed on the outer periphery of the threaded connection part, and the inner cavity extends from the upper end face of the upper fixing part to the lower end face of the threaded connection part.

[0010] The inner cavity includes a first through hole for wires to pass through, a second through hole for the riveting end of the conductive terminal and the wires to pass through together, and a frustum cavity that connects the first through hole and the second through hole respectively.

[0011] The first through hole, the frustum cavity, and the second through hole are arranged from top to bottom. The inner diameter of the first through hole is smaller than the inner diameter of the second through hole, and the frustum cavity has a structure that is smaller at the top and larger at the bottom.

[0012] The upper section of the upper fixing part is provided with an annular groove along its circumference.

[0013] As a preferred embodiment, the intermediate connecting portion is connected to the threaded connecting portion via a frustum-shaped portion.

[0014] As a preferred embodiment, the outer diameter of the intermediate connecting part is smaller than the outer diameter of the threaded connecting part.

[0015] As a preferred embodiment, the upper fixing part includes a first cylindrical part, a second cylindrical part, a hexagonal part and a third cylindrical part arranged sequentially from top to bottom;

[0016] The annular groove is formed on the first cylindrical part, the outer diameter of the first cylindrical part is smaller than the outer diameter of the second cylindrical part, the outer diameter of the second cylindrical part is smaller than the outer diameter of the third cylindrical part, and the third cylindrical part is connected to the intermediate connecting part.

[0017] As a preferred embodiment, the thickness of the hexagonal portion is simultaneously less than the thicknesses of the first cylindrical portion, the second cylindrical portion, and the third cylindrical portion.

[0018] As a preferred embodiment, the outer surface of the second cylindrical portion is provided with several circumferentially spaced cut surfaces, and each cut surface does not pass through the axis of the second cylindrical portion.

[0019] As a preferred embodiment, the cross-section is provided with four surfaces, which are respectively located on the front, rear, left and right end faces of the second cylindrical portion.

[0020] As a preferred embodiment, the second cylindrical portion is provided with a plurality of grooves along its circumferential spacing, and the two ends of each groove extend into different tangential surfaces.

[0021] As a preferred embodiment, the sidewalls of the hexagonal portion include a front sidewall, a left front sidewall, a right front sidewall, a rear sidewall, a left rear sidewall, and a right rear sidewall;

[0022] The front sidewall is connected to the tangent of the front end face of the second cylindrical part, and the rear sidewall is connected to the tangent of the rear end face of the second cylindrical part.

[0023] As a preferred embodiment, the connection between the left front sidewall and the left rear sidewall, and the connection between the right front sidewall and the right rear sidewall, are provided with rounded corners, and the rounded corners are connected to the outer surface of the third cylindrical part.

[0024] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, it mainly divides the inner cavity into a first through hole, a frustum cavity, and a second through hole. The first through hole facilitates the positioning of the wire to be riveted, preventing it from shaking during the riveting process and affecting the riveting. The frustum cavity increases the contact area between the riveted wire end and the wire and the terminal fixing sleeve body after riveting, thereby greatly increasing their stability and reliability after assembly. Moreover, the annular groove facilitates the subsequent assembly of the terminal fixing sleeve body.

[0025] Secondly, the cross-sectional design of the second cylindrical part facilitates subsequent installation and positioning of the second cylindrical part, and increases the contact area between the worker's hand and the terminal fixing sleeve body, thereby making it easier to disassemble and assemble the terminal fixing sleeve body. Moreover, the rounded corners of the first cylindrical part, the second cylindrical part, the third cylindrical part and the hexagonal part effectively prevent workers from being cut when disassembling and assembling the terminal fixing sleeve body.

[0026] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of another aspect of an embodiment of the present utility model;

[0029] Figure 3 This is a front view of an embodiment of the present utility model;

[0030] Figure 4 This is a cross-sectional structural schematic diagram of an embodiment of the present invention.

[0031] Explanation of icon numbers:

[0032] 10. Upper fixing part

[0033] 11. First cylindrical part

[0034] 111. Annular slot; 112. Groove

[0035] 12. Second cylindrical section

[0036] 121. Cross-section; 122. Groove

[0037] 13. Hexagonal part

[0038] 131. Frontal side wall; 132. Left frontal side wall

[0039] 133. Right anterior lateral wall; 134. Posterior lateral wall

[0040] 135. Left posterior sidewall 136. Right posterior sidewall

[0041] 14. Third cylindrical section

[0042] 20. Intermediate connecting part

[0043] 30. Frustum

[0044] 40. Threaded connection part; 41. External thread

[0045] 51. First through hole; 52. Frustum cavity

[0046] 53. Second through hole. Detailed Implementation

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] like Figures 1 to 4 As shown, a wire tail terminal fixing sleeve for an electrical connector includes a terminal fixing sleeve body, the outer periphery of which is provided with an external thread 41, and the terminal fixing sleeve body has an inner cavity with open upper and lower ends.

[0049] The terminal fixing sleeve body includes an upper fixing part 10, an intermediate connecting part 20, and a threaded connecting part 40 connected sequentially from top to bottom; in this embodiment, the intermediate connecting part 20 is connected to the threaded connecting part 40 via a frustum portion 30. The outer diameter of the intermediate connecting part 20 is smaller than the outer diameter of the threaded connecting part 40.

[0050] The external thread 41 is formed on the outer periphery of the threaded connection portion 40, and the inner cavity extends from the upper end face of the upper fixing portion 10 to the lower end face of the threaded connection portion 40.

[0051] The inner cavity includes a first through hole 51 for wires to pass through, a second through hole 53 for the riveting end of the conductive terminal and the wires to pass through together, and a frustum cavity 52 that connects the first through hole 51 and the second through hole 53 respectively.

[0052] The first through hole 51, the frustum cavity 52, and the second through hole 53 are arranged from top to bottom. The inner diameter of the first through hole 51 is smaller than the inner diameter of the second through hole 53, and the frustum cavity 52 has a structure that is smaller at the top and larger at the bottom.

[0053] The upper section of the upper fixing part 10 is recessed with an annular groove 111 along its circumference. In this embodiment, the upper fixing part 10 includes a first cylindrical part 11, a second cylindrical part 12, a hexagonal part 13 and a third cylindrical part 14 arranged sequentially from top to bottom;

[0054] The annular groove 111 is formed on the first cylindrical portion 11. In this embodiment, the upper end face of the first cylindrical portion 11 is recessed into a groove 112, the groove 112 communicates with the first through hole 51 and the inner diameter of the groove 112 is larger than the inner diameter of the first through hole 51. The first through hole 51 is located in the first cylindrical portion 11, the second cylindrical portion 12, the hexagonal portion 13, the third cylindrical portion 14 and the intermediate connecting portion 20, the frustum cavity 52 is located in the intermediate connecting portion 20 and the frustum portion 30, and the second through hole 53 is located in the frustum portion 30 and the threaded connecting portion 40.

[0055] The outer diameter of the first cylindrical portion 11 is smaller than the outer diameter of the second cylindrical portion 12, the outer diameter of the second cylindrical portion 12 is smaller than the outer diameter of the third cylindrical portion 14, and the third cylindrical portion 14 is connected to the intermediate connecting portion 20. The outer diameter of the third cylindrical portion 14 is larger than the outer diameter of the intermediate connecting portion 20.

[0056] The outer surface of the second cylindrical part 12 is provided with a plurality of cut surfaces 121 at circumferential intervals, and each cut surface 121 does not pass through the axis of the second cylindrical part 12, that is, the cut surface 121 never coincides with the axial cut surface 121 of the second cylindrical part 12. This ensures that the area of ​​the cut surface 121 is always smaller than the area of ​​the axial cut surface 121, thereby better ensuring the subsequent assembly and positioning of the second cylindrical part 12.

[0057] The second cylindrical portion 12 is recessed with a plurality of grooves 122 along its circumferential spacing, and the two ends of each groove 122 extend into different cut surfaces 121 respectively.

[0058] In this embodiment, four cut surfaces 121 are provided, and are respectively provided on the front, rear, left and right end faces of the second cylindrical portion 12.

[0059] The thickness of the hexagonal portion 13 is simultaneously less than the thicknesses of the first cylindrical portion 11, the second cylindrical portion 12, and the third cylindrical portion 14. The sidewalls of the hexagonal portion 13 include a front sidewall 131, a left front sidewall 132, a right front sidewall 133, a rear sidewall 134, a left rear sidewall 135, and a right rear sidewall 136.

[0060] The front sidewall 131 is connected to the cross surface 121 of the front end face of the second cylindrical part 12, and the rear sidewall 134 is connected to the cross surface 121 of the rear end face of the second cylindrical part 12.

[0061] By directly cutting off a portion of the arc surface on the second cylindrical part 12 to form the cut surface 121, it is beneficial to ensure the subsequent installation and positioning of the second cylindrical part 12.

[0062] The key design feature of this utility model is that it mainly divides the inner cavity into a first through hole, a frustum cavity, and a second through hole. The first through hole facilitates the positioning of the wire to be riveted, preventing it from shaking during the riveting process and affecting the riveting. The frustum cavity increases the contact area between the riveted wire end and the wire and the terminal fixing sleeve body after riveting, thereby greatly increasing their stability and reliability after assembly. Moreover, the annular groove facilitates the subsequent assembly of the terminal fixing sleeve body.

[0063] Secondly, the cross-sectional design of the second cylindrical part facilitates subsequent installation and positioning of the second cylindrical part, and increases the contact area between the worker's hand and the terminal fixing sleeve body, thereby making it easier to disassemble and assemble the terminal fixing sleeve body. Moreover, the rounded corners of the first cylindrical part, the second cylindrical part, the third cylindrical part and the hexagonal part effectively prevent workers from being cut when disassembling and assembling the terminal fixing sleeve body.

[0064] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A terminal retaining sleeve for an electrical connector, comprising a terminal retaining sleeve body, wherein the outer periphery of the terminal retaining sleeve body is provided with external threads, the terminal retaining sleeve body having an inner cavity, the upper and lower ends of the inner cavity being open, characterized in that: The terminal fixing sleeve body includes an upper fixing part, an intermediate connecting part and a threaded connecting part connected from top to bottom; The external thread is formed on the outer periphery of the threaded connection part, and the inner cavity extends from the upper end face of the upper fixing part to the lower end face of the threaded connection part. The inner cavity includes a first through hole for wires to pass through, a second through hole for the riveting end of the conductive terminal and the wires to pass through together, and a frustum cavity that connects the first through hole and the second through hole respectively. The first through hole, the frustum cavity, and the second through hole are arranged from top to bottom. The inner diameter of the first through hole is smaller than the inner diameter of the second through hole, and the frustum cavity has a structure that is smaller at the top and larger at the bottom. The upper section of the upper fixing part is provided with an annular groove along its circumference.

2. The pigtail terminal fixing sleeve for an electrical connector according to claim 1, characterized by: The intermediate connecting part is connected to the threaded connecting part through the frustum portion.

3. The pigtail terminal fixing sleeve for an electrical connector according to claim 1 or 2, characterized by: The outer diameter of the intermediate connecting part is smaller than the outer diameter of the threaded connecting part.

4. The pigtail terminal retainer for an electrical connector of claim 1, wherein: The upper fixing part includes a first cylindrical part, a second cylindrical part, a hexagonal part and a third cylindrical part arranged sequentially from top to bottom; The annular groove is formed on the first cylindrical part, the outer diameter of the first cylindrical part is smaller than the outer diameter of the second cylindrical part, the outer diameter of the second cylindrical part is smaller than the outer diameter of the third cylindrical part, and the third cylindrical part is connected to the intermediate connecting part.

5. The pigtail terminal retainer for an electrical connector of claim 4, wherein: The thickness of the hexagonal portion is simultaneously less than the thickness of the first cylindrical portion, the second cylindrical portion, and the third cylindrical portion.

6. The pigtail terminal retainer for an electrical connector of claim 4, wherein: The outer surface of the second cylindrical part has several cleavage surfaces spaced circumferentially, and each cleavage surface does not pass through the axis of the second cylindrical part.

7. The pigtail terminal fixing sleeve for an electrical connector according to claim 6, characterized by: The cross-section is provided in four parts, and is respectively provided on the front, rear, left and right end faces of the second cylindrical part.

8. The pigtail terminal retainer for an electrical connector of claim 7, wherein: The second cylindrical portion is recessed with a plurality of grooves along its circumferential spacing, and the two ends of each groove extend into different tangential surfaces.

9. The pigtail terminal retainer for an electrical connector of claim 7, wherein: The sidewalls of the hexagonal part include a front sidewall, a left front sidewall, a right front sidewall, a rear sidewall, a left rear sidewall, and a right rear sidewall; The front sidewall is connected to the tangent of the front end face of the second cylindrical part, and the rear sidewall is connected to the tangent of the rear end face of the second cylindrical part.

10. The pigtail terminal retainer for an electrical connector of claim 9, wherein: The connection between the left front sidewall and the left rear sidewall, and the connection between the right front sidewall and the right rear sidewall, are all provided with rounded corners, which connect to the outer surface of the third cylindrical part.

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