Power supply socket

Abstract

The utility model discloses a power supply socket, which comprises a socket main body, a socket rear end cover and a wiring terminal assembly, the socket rear end cover is provided with a via hole at the root of the wiring terminal socket, the wiring terminal assembly can pass through the via hole, a limiting plug is inserted in the via hole, the limiting plug is provided with a jack, and the jack is inserted into the jack. A cable connected with the wiring terminal assembly is in interference fit with the jack. The socket has the advantages that the through hole for the wiring terminal assembly to penetrate through is formed in the socket rear end cover, and the limiting plug sleeved outside the cable is inserted into the through hole, so that the cable sleeved with the limiting plug can be assembled with the wiring terminal assembly in advance, and then the wiring terminal assembly penetrates through the socket rear end cover and then slides into the through hole by sliding the limiting plug. Limiting of the wiring terminal assembly is formed, operation is simplified, and use of tools is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connectors, and specifically relates to a power supply socket. Background Art

[0002] With the rapid development of new energy vehicles, the power distribution power requirement of the vehicle power system is getting larger and larger, and it is necessary to continuously improve the vehicle charging equipment, that is, within the range of safe voltage use, it is necessary to continuously improve the over-current capacity and stability during the electrical transmission of the line.

[0003] At present, the large-current electrical connectors on the market usually adopt the scheme of a grid-type elastic electrical contact plus a sleeve for the terminal block assembly, which increases the contact stability and thus obtains better over-current capacity. In order to form a waterproof protection for the terminal block assembly, the power supply socket is improved to be composed of a socket body, a front end cover and a rear end cover. During assembly, the terminal block assembly and the cable are first fixed to the rear end cover, and then the rear end cover is connected to the socket body. However, the setting of the electrical contact makes the sleeve form a stepped structure with a large front and a small rear. During assembly, multiple cables need to be passed through the rear end cover and then connected to the terminal block assembly one by one, and then the terminal block assembly is fixed to the rear end cover by screws one by one. The operation is cumbersome and requires tools, which needs to be improved. Summary of the Utility Model

[0004] One technical problem to be solved by this application is to overcome the defects of the above related technologies and provide a power supply socket with simple installation.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a power supply socket, including a socket body, a socket rear end cover and a terminal block assembly. A through hole for the terminal block assembly to pass through is provided at the root of the terminal socket on the socket rear end cover. A limit plug is inserted in the through hole, and a jack is provided on the limit plug. The cable connected to the terminal block assembly is in interference fit with the jack.

[0006] Compared with the related technologies, the utility model has the following advantages: a through hole for the terminal block assembly to pass through is opened on the socket rear end cover, and a limit plug sleeved outside the cable is inserted on the through hole. Thus, the cable sleeved with the limit plug can be assembled with the terminal block assembly in advance, and then the limit plug is slid into the through hole after the terminal block assembly passes through the socket rear end cover to form a limit for the terminal block assembly, which simplifies the operation and reduces the use of tools.

[0007] Preferably, the cross sections of the through hole and the limit plug are in a gourd shape. The diameter of the large circle part of the gourd shape is greater than or equal to the outer diameter of the sleeve of the terminal block assembly, and the diameter of the small circle part of the gourd shape is greater than the diameter of the cable of the terminal block assembly.

[0008] As an improvement, the electrical contact of the terminal block assembly includes a middle elastic piece portion and connecting rings at both ends. The connecting rings are complete circular rings, and the elastic piece portion is a grille that is evenly distributed in a circumference and twisted in the same direction. The inner diameter of the middle contact portion of the elastic piece portion is smaller than the inner diameter of the connecting ring.

[0009] As an improvement, the width of the middle section of the grille is greater than the width of other parts of the grille. It is used to increase the width of the contact part to allow large current to pass safely.

[0010] Preferably, the twisting angle of the grille is 60° - 120°. The twisting angle of the elastic piece is appropriate, the elastic piece has sufficient deformation margin, and the connection between the grille and the connecting ring will not be disconnected during the processing.

[0011] Most preferably, the twisting angle of the grille is 90°. The service life of the electrical contact is the longest. Description of the Drawings

[0012] Figure 1 is a perspective view of the power supply socket of the present application.

[0013] Figure 2 is an exploded view of the power supply socket of the present application.

[0014] Figure 3 is a partial exploded view of the socket rear end cover and the terminal fixing part of the present application.

[0015] Figure 4 is an exploded view of the terminal block assembly of the present application.

[0016] Figure 5 is a perspective view of the electrical contact of the present application.

[0017] Description of the Reference Numerals:

[0018] 1. Socket body, 11. Insertion cylinder, 2. Socket rear end cover, 21. Terminal socket, 22. Through hole, 3. Terminal block assembly, 31. Sleeve, 32. Electrical contact, 321. Grille, 322. Connecting ring, 33. Fixed ring, 4. Connection seat, 41. Waterproof groove, 5. Front cover plate, 51. Water retaining ring, 6. Limit plug, 61. Jack. Detailed Embodiments

[0019] First of all, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can adjust them as needed to adapt to specific application scenarios.

[0020] The following further describes the present invention in detail with reference to the drawings and specific embodiments.

[0021] This preferred embodiment is a power supply socket for an electric vehicle as shown in Figure 1 and 2 , which includes a socket body 1, a socket rear end cover 2, a plurality of terminal assemblies 3, a connection seat 4, a front cover plate 5 and a plurality of limit plugs 6; the socket body 1 is provided with a plugging groove, and a plurality of regularly distributed and differently sized plugging cylinders 11 with front and rear openings are arranged in the plugging groove. The front end opening of the plugging cylinder 11 is for inserting a plug pin, and the rear end opening of the plugging cylinder 11 is for inserting the terminal assembly 3; a plurality of lugs are provided on the outer periphery of the front end of the socket body 1 and are fixed to the connection seat 4 through bolt assemblies; a waterproof groove 41 is arranged in the connection seat 4, and the inner side wall of the waterproof groove 41 surrounds the outer periphery of the plugging groove. The front cover plate 5 is hinged to the connection seat 4, and a raised water retaining ring 51 is arranged in the front cover plate 5. When the front cover plate 5 covers the plugging groove, it is embedded in the connection seat 4, and the water retaining ring 51 is inserted into the waterproof groove 41 to form a waterproof seal for the plugging groove; the rear end of the socket body 1 is fixedly connected to the socket rear end cover 2 through screws. A raised terminal socket 21 is arranged at the front end of the socket rear end cover 2, and the head of the terminal assembly 3 is plugged and fixed in the cavity between the terminal socket 21 and the plugging cylinder 11; as shown in Figure 3 , a through hole 22 is arranged at the root of the terminal socket 21 on the socket rear end cover 2, and the limit plug 6 is plugged and fixed in the through hole 22. A jack 61 is arranged on the limit plug 6, and a cable electrically connected to the terminal assembly 3 passes through the jack 61 and exits the socket rear end cover 2 backward. The cable is in interference fit with the jack 61. Among them, the cross sections of the through hole 22 and the limit plug 6 are in a gourd shape. The diameter of the large circle part of the gourd shape is greater than or equal to the outer diameter of the sleeve 31 of the terminal assembly 3, and the diameter of the small circle part of the gourd shape is greater than the diameter of the cable of the terminal assembly 3. The jack 61 is arranged in the small circle part of the gourd shape. An axially extending notch is arranged on the side of the terminal socket 21. The notch is in front of the large circle part of the gourd shape, and the width at the notch is greater than or equal to the diameter of the cable and less than the outer diameter of the cable connection part at the tail end of the sleeve 31 of the terminal assembly 3.

[0022] In this embodiment, the terminal assembly 3 is as shown in Figure 4 , and includes a sleeve 31, an electrical contact 32 and a fixing ring 33. Ventilation and drainage holes are arranged at the bottom of the sleeve 31; as shown in Figure 3 , the electrical contact 32 is inserted into the sleeve 31 and electrically connected to the sleeve 31. The fixing ring 33 is fixed to the sleeve 31 to limit the electrical contact 32 in the sleeve 31. The stepped part at the rear end of the sleeve 31 is plugged on the terminal socket 21 of the socket rear end cover 2.

[0023] Among them, the electrical contact 32 is as shown in Figure 5As shown, it includes a middle elastic piece portion 321 and connecting rings 322 at both ends. The connecting rings 322 are complete circular rings. The elastic piece portion 321 is a grille that is evenly distributed in a circumference and twisted in the same direction. There are ventilation and heat dissipation holes between the grilles. The inner diameter of the middle contact portion of the elastic piece portion 321 is smaller than the inner diameter of the connecting rings 322. As an improvement, the width of the middle section of the grille is greater than the width of other parts of the grille; when the twisting angle of the grille is greater than 30° and less than 150°, the twisting angle of the grille is preferably 60° - 120°, and the optimal twisting angle of the grille is about 90°.

[0024] During assembly, first assemble the terminal block assembly 3, then sleeved the limit plug 6 outside the cable, then connect and fix the cable to the terminal block assembly 3. Then, pass the terminal block assembly 3 from the back of the socket rear cover 2 through the large circular portion of the through hole 22 to the front of the socket rear cover 2. After the cable is inserted into the small circular portion of the through hole 22 and retracted, the tail end of the sleeve 32 of the terminal block assembly 3 is inserted into the terminal block socket 21. Then slide the limit plug 6 so that the limit plug 6 is inserted into the through hole 22 along the cable and fixed. The sleeve 31 of the terminal block assembly 3 and the socket main body 1 are inserted into the insertion cylinder 11 to form a guiding function. After the socket rear cover 2 and the socket main body 1 are fitted, they are fixed by screws. Finally, the front cover plate 5 and the connecting seat 4 are hinged and then fixed to the socket main body 1 through a bolt assembly.

[0025] The above is only the specific implementation manner of the present application. Figure 2 and Figure 3 In the figure, only a limit plug 6 is schematically drawn, but the protection scope of the present application is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A power socket, comprising a socket body, a socket rear end cover and a terminal assembly, characterized in that: The rear end cover of the socket is provided with a through hole at the root of the terminal socket for the terminal assembly to pass through, a limit plug is inserted into the through hole, a socket is provided on the limit plug, and the cable of the terminal assembly is interference fit with the socket.

2. The power socket according to claim 1, characterized in that: The cross-section of the via hole and the stopper is gourd-shaped, the diameter of the large gourd-shaped part is greater than or equal to the outer diameter of the terminal assembly sleeve, and the diameter of the small gourd-shaped part is greater than the diameter of the cable of the terminal assembly.

3. The power socket according to claim 1 or 2, characterized in that: The electrical contact of the terminal assembly includes a middle spring piece part and connecting rings at both ends, the connecting ring is a complete circular ring, the spring piece part is a grid evenly distributed around the circumference and twisted in the same direction, and the inner diameter of the middle contact part of the spring piece part is smaller than the inner diameter of the connecting ring.

4. The power socket according to claim 3, characterized in that: The width of the middle section of the grille is greater than the width of other parts of the grille.

5. The power socket according to claim 3, characterized in that: The torsion angle of the grille is 60°~120°.

6. The power socket according to claim 5, characterized in that: The torsion angle of the grille is 90°.

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