Riveting type high-reliability contact terminal structure

Abstract

The utility model discloses a riveting type high-reliability contact terminal structure. The riveting type high-reliability contact terminal structure comprises a female end main body, a metal sleeve and a crown spring, the front end of the female end main body is provided with a riveting hole; an accommodating cavity with openings in the front end and the rear end is formed in the metal sleeve; the front contact ring and the rear contact ring are both in interference fit with the metal sleeve by reducing the metal sleeve, and the front end face of the front contact ring abuts against the rear end face of the limiting ring so as to prevent the crown spring from being forwards separated from the containing cavity, so that the crown spring and the metal sleeve are combined into an approximate whole, and almost no contact resistance exists; and after the two ends of the crown spring are stable, when the male end pin is inserted into the crown spring, the crown spring does not shift, the contact between the male end pin and the crown spring is more stable, in addition, the contact resistance is extremely low, the stable contact between the male end pin and the crown spring is kept, and the service life of the crown spring is prolonged. A lower temperature rise is provided for a connector product, and serious heating is avoided.

Description

Technical Field

[0001] The utility model relates to the technology of connector field, in particular to a riveting type high-reliability contact terminal structure. Background Art

[0002] In the prior art, crown spring terminal connectors are widely used in electrical connections that transmit higher currents, such as power transmission interfaces of electric vehicles. They have the advantages of being able to withstand high currents and stabilize currents, and they occupy a small space. The plug-in and pull-out resistance is also smaller than that of general electrical connectors, making them very convenient to use.

[0003] At present, the main structure of the crown spring terminal in the crown spring terminal connector includes a female body and a crown spring; the front end of the female body has a mounting hole, the crown spring is placed in the mounting hole, and then a limiting ring is riveted or welded on the front end of the female body, and the crown spring is limited in the mounting hole by the limiting ring to prevent the crown spring from slipping out of the mounting hole forward.

[0004] Although the above structure can realize the installation of the crown spring, there is a clearance fit between the crown spring and the installation hole in this structure. Due to the clearance fit, when the male end pin is inserted, the crown spring will become longer and displaced. After the male end pin is inserted, the crown spring deforms and contacts the female end body, resulting in a large contact resistance, which leads to a rapid temperature rise of the connector product, thereby causing serious heating. Therefore, it is necessary to improve the current crown spring terminal. Utility Model Content

[0005] In view of this, the present invention aims to overcome the deficiencies in the prior art, and its main purpose is to provide a riveted high-reliability contact terminal structure, which can effectively solve the problem that the crown spring in the existing crown spring terminal is easy to shift and easily generate a large contact resistance.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A riveted high-reliability contact terminal structure comprises a female end body, a metal sleeve and a crown spring; the front end of the female end body is provided with a rivet hole; the metal sleeve is provided with a receiving cavity with front and rear ends opened, the rear end of the metal sleeve is inserted into the rivet hole and fixed by rivets, the front end of the metal sleeve extends out of the rivet hole, and the front end edge of the metal sleeve is closed to form a limiting ring; the crown spring is adapted to the receiving cavity and is arranged in the receiving cavity, the crown spring comprises a front contact ring, a rear contact ring and a plurality of contact spring sheets integrally formed and connected between the front contact ring and the rear contact ring, the front contact ring, the rear contact ring and the plurality of contact spring sheets surround and form an insertion cavity extending forward and backward, the front end openings of the insertion cavity and the receiving cavity are opposite to each other, and the front contact ring and the rear contact ring are both interference-fitted with the metal sleeve by shrinking the metal sleeve, and the front end surface of the front contact ring is against the rear end surface of the limiting ring.

[0008] As a preferred solution, the metal sleeve is shrunk by spinning to achieve interference fit with the front contact ring and the rear contact ring, which makes the manufacturing process easy.

[0009] As a preferred solution, the female end body includes a connecting portion and a wiring portion which are integrally connected, the rivet hole is located on the connecting portion, and a wire pressing hole is provided on the wiring portion, which has a simple structure and is easy to install.

[0010] As a preferred solution, the connecting portion and the wiring portion are columnar structures, and the connecting portion and the wiring portion are coaxially arranged, which can meet the requirements of axial installation and allow large current to pass through.

[0011] As a preferred solution, the connecting part is a plate-like structure, the metal sleeve is arranged perpendicular to the connecting part, and the wiring part is a columnar structure and is arranged horizontally with the connecting part, which can meet the requirements of vertical installation.

[0012] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0013] In this product, both the front contact ring and the rear contact ring are interference fit with the metal sleeve by shrinking the metal sleeve, and the front end face of the front contact ring is against the rear end face of the limit ring to prevent the crown spring from slipping forward out of the accommodating cavity, so that the crown spring and the metal sleeve are combined into a nearly whole, with almost no contact resistance, and foreign matter such as dust cannot enter. It can be applied to harsh and complex environments to provide continuous and reliable contact. After the two ends of the crown spring are stable, when the male pin is inserted into the crown spring, the crown spring does not shift, and the contact between the male pin and the crown spring is more stable. In addition, the extremely low contact resistance maintains stable contact with the male pin, providing a lower temperature rise for the connector product and avoiding severe heat generation.

[0014] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial cross-sectional schematic diagram of the first preferred embodiment of the utility model;

[0016] Figure 2 It is a partial enlarged schematic diagram of the first preferred embodiment of the utility model;

[0017] Figure 3 yes Figure 2 A magnified schematic diagram of the position A in the middle;

[0018] Figure 4 It is a partial cross-sectional schematic diagram of the second preferred embodiment of the utility model.

[0019] Description of the accompanying drawings:

[0020] 10. Female end body 11. Connecting part

[0021] 12. Wiring part 101, Riveting hole

[0022] 102, crimping hole 20, metal sleeve

[0023] 21. Accommodating cavity 22. Limiting ring

[0024] 30. Crown spring 31. Front contact ring

[0025] 32. Rear contact ring 33. Contact spring

[0026] 301, insertion cavity 40, male end pin

[0027] 41. Wire pressing hole. DETAILED DESCRIPTION

[0028] Please refer to Figures 1 to 3 As shown, it shows the specific structure of the first preferred embodiment of the utility model, including a female end body 10, a metal sleeve 20 and a crown spring 30.

[0029] The front end of the female end body 10 has a rivet hole 101. The female end body 10 includes a connecting portion 11 and a wiring portion 12 that are integrally connected. The rivet hole 101 is located on the connecting portion 11, and a wire pressing hole 102 is provided on the wiring portion 12. The wire pressing hole 102 is used for riveting with the connecting wire, and has a simple structure and is easy to install. In addition, the connecting portion 11 and the wiring portion 12 are columnar structures, and the connecting portion 11 and the wiring portion 12 are coaxially arranged, which can meet the requirements of axial installation and can allow large current to pass through. In addition, the female end body 10 is made of metal copper and has good electrical conductivity.

[0030] The metal sleeve 20 has a receiving cavity 21 with openings at both ends. The rear end of the metal sleeve 20 is inserted into the riveting hole 101 and riveted and fixed. The front end of the metal sleeve 20 extends out of the riveting hole 101, and the front edge of the metal sleeve 20 is closed to form a limit ring 22. In this embodiment, the rear end outer wall of the metal sleeve 20 is tightly matched with the inner wall of the riveting hole 101, the contact area is larger, and a larger current can pass through. In addition, the metal sleeve 20 is a cylindrical structure, and the metal sleeve 20 is made of metal copper, which has good electrical conductivity.

[0031] The crown spring 30 is adapted to the accommodating cavity 21 and is arranged in the accommodating cavity 21. The crown spring 30 includes a front contact ring 31, a rear contact ring 32, and a plurality of contact springs 33 integrally formed and connected between the front contact ring 31 and the rear contact ring 32. The front contact ring 31, the rear contact ring 32, and the plurality of contact springs 33 surround and form an insertion cavity 301 extending forward and backward. The insertion cavity 301 and the front end opening of the accommodating cavity 21 are opposite to each other, and the front contact ring 31 and the rear contact ring 32 are both interference-fitted with the metal sleeve 20 by reducing the metal sleeve 20, and the front end surface of the front contact ring 31 abuts against the metal sleeve 20. On the rear end surface of the limiting ring 22, the crown spring 30 is prevented from escaping forward from the accommodating cavity 21, so that the crown spring 30 and the metal sleeve 20 are combined into a nearly integral whole, with almost no contact resistance, and foreign matter such as dust cannot enter, and can be applied to harsh and complex environments, providing continuous and reliable contact, and, after the two ends of the crown spring 30 are stable, when the male end pin 40 is inserted into the crown spring 30, the crown spring 30 does not shift, and the male end pin 40 and the crown spring 30 are in more stable contact. In addition, the extremely low contact resistance maintains stable contact with the male end pin 40, providing a lower temperature rise for the connector product. In this embodiment, the crown spring 30 is made of metal copper, which is formed by stamping and has good conductivity, and the front contact ring 31 and the rear contact ring 32 are both circular rings; and the metal sleeve 20 is reduced by spinning and is interference-coupled with the front contact ring 31 and the rear contact ring 32, which is easy to manufacture.

[0032] The assembly process of this embodiment is described in detail as follows:

[0033] First, insert the crown spring 30 into the accommodating cavity 21, and compress the metal sleeve 20 by rotating it so that the front contact ring 31 and the rear contact ring 32 are both interference fit with the metal sleeve 20, and close the front end of the metal sleeve 20 to form a limit ring 22 to limit the crown spring 30, and then insert the rear end of the metal sleeve 20 into the rivet hole 101 to rivet and fix the interface. When in use, the two external connecting wires are riveted and fixed to the wire pressing hole 102 on the wiring part 12 and the wire pressing hole 41 on the male end pin 40, and then the front end of the male end pin 40 is inserted into the insertion cavity 301. After being inserted into place, the front end of the male end pin 40 is in elastic contact with the multiple contact springs 33, thereby realizing the current conduction connection of the two connecting wires.

[0034] Please refer to Figure 4 As shown, it shows the specific structure of the second preferred embodiment of the utility model. The specific structure of this embodiment is basically the same as the specific structure of the first preferred embodiment mentioned above, and the difference is that:

[0035] In this embodiment, the connecting portion 11 is a plate-like structure, the metal sleeve 20 is arranged perpendicular to the connecting portion 11, and the wiring portion 12 is a columnar structure and is arranged horizontally with the connecting portion 11, which can meet the requirements of vertical installation.

[0036] The assembly process of this embodiment is substantially the same as that of the first preferred embodiment, and the assembly process of this embodiment will not be described in detail herein.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A riveting type high reliability contact terminal structure, characterized in that: The invention comprises a female end body, a metal sleeve and a crown spring; the front end of the female end body is provided with a rivet hole; the metal sleeve is provided with a receiving cavity with front and rear ends opened, the rear end of the metal sleeve is inserted into the rivet hole and fixed by rivets, the front end of the metal sleeve extends out of the rivet hole, and the front end edge of the metal sleeve is closed to form a limiting ring; the crown spring is adapted to the receiving cavity and arranged in the receiving cavity, the crown spring comprises a front contact ring, a rear contact ring and a plurality of contact spring sheets integrally formed and connected between the front contact ring and the rear contact ring, the front contact ring, the rear contact ring and the plurality of contact spring sheets surround and form an insertion cavity extending forward and backward, the front end openings of the insertion cavity and the receiving cavity are opposite to each other, and the front contact ring and the rear contact ring are both interference fit with the metal sleeve by shrinking the metal sleeve, and the front end face of the front contact ring is against the rear end face of the limiting ring.

2. The riveting type high reliability contact terminal structure according to claim 1, characterized in that: The metal sleeve is shrunk by spinning to be interference-bonded with the front contact ring and the rear contact ring.

3. The riveting type high reliability contact terminal structure according to claim 1, characterized in that: The female end body comprises a connecting portion and a wiring portion which are integrally formed and connected, the riveting hole is located on the connecting portion, and a wire pressing hole is provided on the wiring portion.

4. The riveting type high reliability contact terminal structure according to claim 3, characterized in that: The connecting portion and the wiring portion are columnar structures, and the connecting portion and the wiring portion are coaxially arranged.

5. The riveting type high reliability contact terminal structure according to claim 3, characterized in that: The connecting portion is a plate-like structure, the metal sleeve is arranged perpendicular to the connecting portion, and the wiring portion is a columnar structure and is arranged transversely to the connecting portion.

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