High-current stud terminals with waterproof structure

Abstract

This utility model discloses a high-current stud terminal with a waterproof structure, comprising: a terminal body and a sealing ring. The terminal body includes a threaded stud integrally formed from top to bottom along the axial direction, a boss with a radial dimension larger than the diameter of the threaded stud, and a lead portion extending from the bottom surface of the boss. The lead portion is arrayed along the outer periphery of the bottom surface of the boss. A limiting groove is formed on the side surface of the boss, and the sealing ring is sleeved on the limiting groove. This utility model forms a limiting groove on the side of the boss integrally formed on the stud terminal, and the sealing ring is positioned by the limiting groove. When the stud terminal mates with the connecting through hole on the plastic housing, the sealing ring located in the limiting groove is interference-fitted with the connecting through hole, sealing the connecting through hole. Its structure is simple and easy to process and assemble.

Description

Technical Field

[0001] This utility model relates to the technical field of connector products, and specifically to a high-current stud terminal with a waterproof structure. Background Technology

[0002] With the rapid development of new energy vehicles, the integration of various domain controllers, high-current power supply, high-current conversion, and high-current fast charging all place higher demands on the power supply current of each module. Under a 12V-48V voltage platform, the single-pin current carrying capacity needs to reach 150A-300A, and it must meet the international standards for automotive-grade (USCAR, LV214) low-voltage connectors. The best way to improve the current carrying capacity is to improve the conductivity of the conductor material.

[0003] Stud terminals are a commonly used type of high-current conductive terminal on the market. These terminals are typically formed by machining a single piece of copper. See Chinese Utility Model Patent No. 202322190035.3, which discloses "a high-current stud terminal." This technical solution uses metal sheet stamping and bending to reduce costs.

[0004] Both traditional one-piece molded stud terminals and the stamped stud terminals used in the above-mentioned technical solutions have the following problems in use: In actual use, the stud terminals need to be fixed to the plastic housing. Due to the diverse shapes of the plastic housing (such as curved surfaces), the waterproof design of this non-planar plastic housing is challenging, resulting in insufficient waterproof performance of the final product. In view of this, the inventors propose the following technical solution. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-current stud terminal with a waterproof structure.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a high-current stud terminal with a waterproof structure, comprising: a terminal body and a sealing ring, wherein the terminal body comprises a threaded stud integrally formed from top to bottom along the axial direction, a boss with a radial dimension larger than the diameter of the threaded stud, and a pin portion extending from the bottom surface of the boss; the pin portion is arrayed along the outer periphery of the bottom surface of the boss; a limiting groove is formed on the side surface of the boss, and the sealing ring is sleeved on the limiting groove.

[0007] Furthermore, in the above technical solution, protrusions are evenly distributed within the area enclosed by the pin portion, and the height of the protrusions is less than the height of the pin portion.

[0008] Furthermore, in the above technical solution, the cross-section of the boss is a square with rounded corners, and the upper surface of the boss is formed with a guiding arc surface.

[0009] Furthermore, in the above technical solution, the outer surface of the sealing ring is formed with at least two annular flanges.

[0010] Furthermore, in the above technical solution, the sealing ring is formed with three parallel annular flanges, and the height of the middle annular flange is higher than the height of the annular flanges on both sides.

[0011] Furthermore, in the above technical solution, the high-current stud terminal is mounted on a plastic housing; the plastic housing has a connecting through hole for the terminal body to be inserted, the diameter of the connecting through hole is adapted to the boss, and the sealing ring located in the limiting groove is interference-fitted with the upper connecting through hole to seal the connecting through hole.

[0012] Furthermore, in the above technical solution, a wire connecting piece that connects to an external wire is sleeved on the threaded post in the terminal body, and the wire connecting piece is fastened by the threaded post and the nut being threaded together.

[0013] Furthermore, in the above technical solution, the inner side of the plastic shell is integrally formed with a frame, which surrounds and forms the connecting through hole.

[0014] Furthermore, in the above technical solution, the bottom surface of the boss in the terminal body protrudes downwards from the bottom surface of the frame.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: Firstly, this invention features a limiting groove formed on the side of the integrally formed boss on the stud terminal, which positions the sealing ring. When the stud terminal mates with the connecting through hole on the plastic housing, the sealing ring located in the limiting groove is interference-fitted with the connecting through hole, sealing the connecting through hole. Its structure is simple and easy to process and assemble.

[0016] Secondly, in order to adapt to non-flat plastic shells, this utility model extends and forms a frame on the inner side of the plastic shell, and uses the frame to form a connection through hole that matches the stud terminal. In this way, there is no need to form a flange or other structure on the outer surface of the plastic shell, which can ensure a stable connection between the stud terminal and the plastic shell. Attached Figure Description

[0017] Figure 1 This is a perspective view of the stud terminal in this utility model; Figure 2 This is a perspective view of the stud terminal in this utility model from another angle; Figure 3 This is a perspective view of the mating of the stud terminal and the plastic housing in this utility model; Figure 4This is a cross-sectional view of the fit between the stud terminal and the plastic housing in this utility model; Figure 5 This is an exploded perspective view of the fit between the stud terminal and the plastic housing in this utility model; Figure 6 This is an exploded perspective view of the present invention when assembled with a circuit board; Figure 7 This is a perspective view of the utility model in use. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0019] See Figures 1 to 3 As shown, the high-current stud terminal of this utility model includes: a terminal body 1 and a sealing ring 2.

[0020] The terminal body 1 is typically formed integrally from a metal block by machining. Specifically, the terminal body 1 is integrally formed from top to bottom along the axial direction as a threaded post 11, a boss 12, and a pin portion 13.

[0021] The threaded post 11 is used for connection with external wires, and the diameter of the threaded post 11 can be set according to actual needs. The boss 12 has a square cross-section with rounded corners to prevent rotation of the shaft hole during subsequent installation with the plastic housing 3.

[0022] The pin portion 13 is used for soldering to the circuit board, and the pin portion 13 is arrayed and distributed around the bottom surface of the boss 12. That is, the pin portion 13 encloses a square area. On the bottom surface of the boss 12, protrusions 14 are evenly distributed within the area enclosed by the pin portion 13, and the height of the protrusions 14 is less than the height of the pin portion 13. The function of the protrusions 14 is to provide a certain degree of isolation between the bottom surface of the boss 12 and the circuit board when the terminal body 1 is soldered to the circuit board, which facilitates soldering and heat dissipation.

[0023] See Figures 3 to 6 As shown, this utility model is installed on the plastic housing 3 during use. The plastic housing 3 has a connecting through hole 30 for inserting the terminal body 1. The diameter of the connecting through hole 30 is adapted to the boss 12. The sealing ring 2 located on the limiting groove 120 is interference-fitted with the upper connecting through hole 301 to seal the connecting through hole 30.

[0024] A wire connecting piece 4, which is connected to an external wire, is fitted onto a threaded post 11 through a sleeve hole 41. The threaded post 11 is threadedly connected to a nut 5 to fasten the wire connecting piece 4.

[0025] To facilitate the assembly of the stud terminal with the connection through hole 30 on the plastic housing 3, the upper surface of the boss 12 is formed with a guiding arc surface 121, that is, the upper surface of the boss 12 is designed as an arc surface, and the stud terminal is guided by the guiding arc surface 121 to facilitate insertion into the connection through hole 30.

[0026] To improve the sealing effect, the outer surface of the sealing ring 2 is formed with at least two annular flanges 21. The parallel annular flanges 21, when mated with the connecting through hole 30, provide multiple waterproofing effects. A preferred embodiment is that the sealing ring 2 has three parallel annular flanges 21, with the middle annular flange 21 being higher than the two side annular flanges 21. When the boss 12 mates with the connecting through hole 30, the two side annular flanges 21, being lower in height, are easier to insert into the connecting through hole 30, while the middle annular flange 21, being higher, deforms upwards and downwards upon mating with the connecting through hole 30, resulting in a better seal.

[0027] In actual production, the plastic housing 3 is usually a non-planar curved sheet material. To achieve a stable connection between the stud terminal and the plastic housing 3, a frame 31 is integrally formed on the inner side of the plastic housing 3. The shape of the frame 31 corresponds to the shape of the boss 13 in the terminal body 1. That is, the frame 31 forms the connecting through hole 30. Of course, to improve the overall strength of the frame 31, reinforcing ribs can be formed on the outer surface of the frame 31. A preferred embodiment is that, in order to achieve axial positioning between the stud terminal and the plastic housing 3, the sidewall of the connecting through hole 30 can be formed with a stepped portion. Figure 4 As shown, when the stud terminal is inserted into the connecting through hole 30 from the inside out, the sealing ring 2 uses the stepped portion to form a limit, preventing the stud terminal from being over-inserted and forming an axial limit.

[0028] Combination Figure 6 As shown, during installation, the sealing ring 2 is fitted into the limiting groove 120, and the stud terminal is inserted into the connecting through hole 30 from the inside out. The boss 13 and the connecting through hole 30 are used for positioning to prevent the terminal body 1 from rotating. The connecting through hole 30 is sealed by the interference fit between the sealing ring 2 and the connecting through hole 30. Finally, the wire connecting piece 4 is fitted onto the threaded post 11 through the sleeve hole 41, and the wire connecting piece 4 is fastened by the threaded connection between the threaded post 11 and the nut 5.

[0029] When this utility model is assembled with a circuit board (PCB) 6, the circuit board 6 has corresponding guide holes 60 formed on the pin portions 13. During installation, the pin portions 13 are inserted into the corresponding guide holes 60 of the circuit board 6, and soldering is performed simultaneously. The arrayed pin portions 13 are connected to the circuit board 6 to achieve current shunting, thereby reducing heat generation and making the connection between the stud terminals and the circuit board 6 more stable.

[0030] See Figure 7 As shown, this is a perspective view of the utility model in use, with three external wires connected to the circuit board 6 via stud terminals.

[0031] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A high-current stud terminal with a waterproof structure, including: Terminal body (1) and sealing ring (2), characterized in that: the terminal body (1) includes a threaded post (11) integrally formed from top to bottom along the axial direction, a boss (12) with a radial dimension larger than the diameter of the threaded post (11), and a pin portion (13) extending from the bottom surface of the boss (12). The pin portion (13) is arrayed along the outer periphery of the bottom surface of the boss (12); A limiting groove (120) is formed on the side surface of the boss (12), and the sealing ring (2) is sleeved on the limiting groove (120); Protrusions (14) are evenly distributed within the area enclosed by the pin portion (13), and the height of the protrusions (14) is less than the height of the pin portion (13); The cross-section of the boss (12) is a square with rounded corners, and the upper surface of the boss (12) is formed with a guide arc surface (131). The outer surface of the sealing ring (2) is formed with at least two annular flanges (21). The high-current stud terminal is mounted on a plastic housing (3); the plastic housing (3) has a connecting through hole (30) for the terminal body (1) to be inserted. The diameter of the connecting through hole (30) is adapted to the boss (12). The sealing ring (2) located in the limiting groove (120) is interference-fitted with the connecting through hole (30) to seal the connecting through hole (30); A wire connecting piece (4) for connecting with an external wire is sleeved on the threaded post (11) in the terminal body (1). The wire connecting piece (4) is fastened by the threaded post (11) and the nut (5) threadedly connected. The inner side of the plastic shell (3) is integrally formed with a frame (31), which surrounds the connecting through hole (30).

2. The high-current stud terminal with a waterproof structure according to claim 1, characterized in that: The sealing ring (2) has three parallel annular flanges (21) formed on it, and the height of the middle annular flange (21) is higher than the height of the annular flanges (21) on both sides.

3. The high-current stud terminal with a waterproof structure according to claim 1, characterized in that: The bottom surface of the boss (12) in the terminal body (1) protrudes downward from the bottom surface of the frame (31).

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