Charging terminal limiting sleeve and charging socket

Abstract

The utility model relates to the field of conductive connection, in particular to a charging terminal limiting sleeve and a charging socket. According to the charging socket, the charging terminal limiting sleeve is arranged between the rear end of the charging terminal and the tail sealing cover assembly, so that the charging terminal limiting sleeve is arranged on the outer side of the connecting position of the charging terminal and the cable in a sleeving mode, the charging terminal limiting sleeve is clamped with the clamping groove in the terminal mounting cavity through the retaining elastic piece of the charging terminal limiting sleeve, and normal connection of the charging terminal and the cable is guaranteed; and the charging terminal limiting sleeve supports the charging terminal from the rear side and is matched with the terminal mounting cavity to stop and limit the charging terminal on the front side, so that the charging terminal is fixedly assembled in the terminal mounting cavity. According to the charging socket, the charging terminal is fixedly assembled in the terminal mounting cavity through the independent charging terminal limiting sleeve, the charging terminal limiting sleeve is independently manufactured, the manufacturing cost is low, only the clamping groove matched with the charging terminal limiting sleeve needs to be formed in the terminal mounting cavity, the structure is simple, and the cost is low. And the cost of a mold for forming the terminal mounting cavity is reduced to a great extent.

Description

Technical Field

[0001] The utility model relates to the field of conductive connection, in particular to a charging terminal limiting sleeve and a charging socket. Background Art

[0002] With the continuous development of the rapid charging technology of new energy vehicles, DC charging sockets are widely used in new energy vehicles. For example, a charging socket disclosed in a Chinese invention patent application with the application publication number CN113270731A, in order to ensure the current-carrying capacity of the DC terminal, a welding platform extending backward is provided at the rear end of the DC terminal and is welded to the plate-shaped connection platform at the end of the cable. When installing it into the socket housing, first connect the terminal to the end of the cable passing through the locking plate and the cable sealing body, then insert the terminal into the socket housing from the rear to the front, then install the wire threading plate into the socket housing, and finally connect the socket housing through the connecting screw sequentially passing through the locking plate, the cable sealing body and the wire threading plate. In the socket with this structural form, the terminal is clamped and fixed by the wire threading plate and the socket housing, and the whole assembly process is relatively troublesome.

[0003] A Chinese invention patent application with the application publication number CN116960669A discloses a charging socket, which is provided with an annular locking groove on the outer side surface of the front end of the DC terminal, and a terminal buckle is provided on the front inner wall of the terminal installation cavity of the charging socket insulator. When the DC terminal is inserted into the terminal installation cavity from the rear to the front, the terminal buckle can be snapped into the locking groove to realize the front and rear limit fixation of the terminal. This method is obviously more convenient for installing the terminal in the charging socket compared with the above-mentioned prior art charging sockets. However, for the charging socket with this structure, the terminal needs to be processed to form the locking groove, and a socket mold capable of forming the terminal buckle needs to be designed, and the mold structure is complex and the cost is high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a charging socket to solve the problem that the manufacturing cost of the existing charging socket is high for the convenience of installing the DC terminal. At the same time, the purpose of the utility model is also to provide a charging terminal limiting sleeve applied to the above-mentioned charging socket to realize the installation of the DC terminal in the socket and solve the above technical problems.

[0005] The charging socket of the present utility model includes a socket housing, which includes a socket insulator. A terminal installation cavity for the charging terminal to be inserted from the rear to the front is provided in the socket insulator. The charging terminal is inserted into the terminal installation cavity, and a charging terminal limiting sleeve is installed in the terminal installation cavity and sleeved on the outside of the connection position of the charging terminal and the cable. The charging terminal limiting sleeve includes a support sleeve body. The front end of the support sleeve body has a front side top support end for abutting and cooperating with the rear end of the charging terminal to support it from the rear side of the charging terminal. A retaining elastic piece that extends obliquely outward is provided on the sleeve wall of the support sleeve body, and it is clamped with the terminal installation cavity through the retaining elastic piece, and cooperates with the terminal installation cavity to stop and limit the charging terminal on the front side, so as to realize the fixed assembly of the charging terminal in the terminal installation cavity.

[0006] Further, a wiring connection piece for cable connection that extends backward is provided at the rear end of the charging terminal, and it is connected to the end of the cable through the wiring connection piece. Avoidance grooves with front side openings are oppositely arranged on the sleeve wall of the support sleeve body to avoid the two side edges of the wiring connection piece. The retaining elastic pieces are symmetrically arranged on the sleeve wall between the two avoidance grooves.

[0007] Further, there are two retaining elastic pieces to ensure the strength of each retaining elastic piece.

[0008] Further, a guiding surface for facilitating insertion into the terminal installation cavity is provided at the outer edge of the front end of the support sleeve body.

[0009] Further, an insulator installation cavity is provided in the socket housing. The socket insulator is inserted into the insulator installation cavity along the front-rear direction and the rear end extends out of the insulator installation cavity, so as to facilitate the charging terminal to be directly inserted into the terminal installation cavity from the rear to the front after the wiring is completed.

[0010] Further, the socket housing includes a tail cover assembly installed at the rear end of the terminal installation cavity and for the cable to pass through back and forth. The tail cover assembly includes a tail cover buckled at the rear end of the terminal installation cavity and a wire sealing body clamped between the tail cover and the rear end of the charging terminal limiting sleeve to achieve tail sealing.

[0011] The present utility model provides a new charging socket. By arranging a charging terminal limiting sleeve between the rear end of the charging terminal and the tail cover assembly, the charging terminal limiting sleeve is sleeved outside the connection position of the charging terminal and the cable, and is clamped with the terminal installation cavity through its own anti-retreat elastic piece. While ensuring the normal connection of the charging terminal and the cable, the charging terminal limiting sleeve supports the charging terminal from the rear side, and cooperates with the terminal installation cavity to block and limit the charging terminal from the front side, realizing the fixed assembly of the charging terminal in the terminal installation cavity. This kind of charging socket realizes the fixed assembly of the charging terminal in the terminal installation cavity through an independent charging terminal limiting sleeve. The charging terminal limiting sleeve is separately manufactured, with low manufacturing cost. It is only necessary to form a clamping groove or clamping platform in the terminal installation cavity that cooperates with the charging terminal limiting sleeve. The structure is simple, and the mold cost of forming the terminal installation cavity is also greatly reduced, and the overall manufacturing cost of the socket is reduced.

[0012] The charging terminal limiting sleeve of the present utility model includes a support sleeve body. The front end of the support sleeve body has a front side supporting end for abutting and cooperating with the rear end of the charging terminal to support the charging terminal from the rear side. The support sleeve body has a receiving inner cavity for receiving the connection part of the cable and the charging terminal. An anti-retreat elastic piece that is inclined and overhanging outward is arranged on the sleeve wall of the support sleeve body for clamping with the terminal installation cavity.

[0013] Further, avoidance grooves with front side openings are oppositely arranged on the sleeve wall of the support sleeve body to avoid the wiring connection pieces for cable connection that extend backward from the rear end of the charging terminal. The anti-retreat elastic piece is arranged on the sleeve wall between the two avoidance grooves and is symmetrically arranged.

[0014] Further, there are two anti-retreat elastic pieces to ensure the strength of each anti-retreat elastic piece.

[0015] Further, a guiding surface for facilitating insertion into the terminal installation cavity is arranged on the outer edge of the front end of the support sleeve body.

[0016] The present utility model provides a brand-new charging terminal limiting sleeve, which is used to be sleeved outside the connection part of the cable and the charging terminal, support the charging terminal from the rear side, and at the same time realize the fixation with the terminal installation cavity through the anti-retreat elastic piece clamped with the terminal installation cavity, so as to be able to cooperate with the terminal installation cavity to block and limit the charging terminal from the front side to realize the fixed assembly of the charging terminal in the terminal installation cavity. The charging terminal limiting sleeve is separately manufactured, with low manufacturing cost. Moreover, it is only necessary to form a clamping groove or clamping platform in the terminal installation cavity that cooperates with the charging terminal limiting sleeve. The structure is simple, and the mold cost of forming the terminal installation cavity is also greatly reduced, and the overall manufacturing cost of the socket is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a specific embodiment of the charging socket of the present utility model;

[0018] Figure 2 is Figure 1 an exploded view of the socket terminal and the socket insulator in the shown charging socket;

[0019] Figure 3 is Figure 1 an exploded view of the socket insulator and the socket housing in the shown charging socket;

[0020] Figure 4 is a schematic structural view of the socket insulator;

[0021] Figure 5 is a schematic structural view of the socket terminal limiting sleeve from the first perspective;

[0022] Figure 6 is a schematic structural view of the socket terminal limiting sleeve from the second perspective;

[0023] Figure 7 is a schematic structural view of the socket terminal limiting sleeve from the third perspective;

[0024] Figure 8 is a schematic structural view of the socket terminal limiting sleeve from the fourth perspective.

[0025] In the figure: 1, socket housing; 10, insulator installation cavity; 13, inwardly turned flange; 14, connecting ear; 2, socket insulator; 20, terminal installation cavity; 21, stop inner flange; 23, outer stop edge; 24, connecting post; 241, clamping platform; 3, charging terminal; 31, wiring connecting piece; 4, charging terminal limiting sleeve; 40, avoidance groove; 41, anti-retreat elastic piece; 42, guiding surface; 5, tail cover; 6, cable; 61, end connecting piece. Detailed implementation mode

[0026] The features and performance of the present utility model will be further described in detail below in conjunction with the implementation mode.

[0027] In the charging socket of the present utility model, a charging terminal limiting sleeve is arranged between the rear end of the charging terminal and the tail cover assembly, and the charging terminal is supported from the rear by the anti-retreat elastic piece of the charging terminal limiting sleeve itself engaging with the terminal installation cavity, and in cooperation with the terminal installation cavity to stop and limit the charging terminal from the front, so as to realize the fixed assembly of the charging terminal in the terminal installation cavity. This kind of charging socket realizes the fixed assembly of the charging terminal in the terminal installation cavity through an independent charging terminal limiting sleeve. The charging terminal limiting sleeve is separately manufactured, with low manufacturing cost. It is only necessary to form a clamping groove or clamping platform in the terminal installation cavity that cooperates with the charging terminal limiting sleeve. The structure is simple, and the mold cost of forming the terminal installation cavity is also greatly reduced, and the overall manufacturing cost of the socket is reduced.

[0028] Specifically, the detailed implementation mode of the charging socket of the present utility model is as Figure 1-8As shown. For the convenience of clearly explaining the structure of the charging socket, the front side of the charging socket facing the charging gun is hereinafter referred to as the front side.

[0029] The charging socket includes a socket housing 1. The socket housing 1 includes a connection flange for fixedly connecting with the vehicle body. Two insulator mounting cavities 10 for mounting a socket insulator 2 are provided in the middle area of the connection flange. The socket insulator 2 is mounted in the insulator mounting cavity 10, and socket terminals are mounted in the socket insulator 2. The socket terminals include charging terminals 3 and signal terminals. There are two insulator mounting cavities 10, and the two socket insulators 2 are respectively mounted in the two insulator mounting cavities 10 to form two charging sockets for plugging in the DC charging gun and the AC charging gun respectively.

[0030] The insulator mounting cavity 10 penetrates through from front to back, and an inwardly retracted flange 13 is provided at the rear end. The socket insulator 2 is inserted into the insulator mounting cavity 10 from front to back. The outer periphery of the socket insulator 2 has an outer stop edge 23. After the socket insulator 2 is inserted into the insulator mounting cavity 10 from front to back, the outer stop edge 23 abuts against the inwardly retracted flange 13 of the insulator mounting cavity 10. A connecting ear 14 extending radially inward is provided at the rear end of the cavity wall of the insulator mounting cavity 10. A connecting post 24 is provided on the socket insulator 2 corresponding to the connecting ear 14. A screw hole is provided on the connecting post 24, and a screw through hole is provided on the connecting ear 14. The connecting screw passes through the connecting ear 14 and is screwed into the connecting post 24 to realize the fixed installation of the socket insulator 2 in the insulator mounting cavity 10.

[0031] A terminal mounting cavity 20 for mounting the charging terminal 3 and extending from front to back is provided on the socket insulator 2. The terminal mounting cavity 20 is formed by a mounting tube extending from front to back formed on the socket insulator 2. The inner cavity of the mounting tube is for the charging terminal 3 to be inserted from front to back. A stop inner flange 21 is provided at the front end of the mounting tube. After the charging terminal 3 is inserted into the mounting tube from back to front, the stop inner flange 21 stops the front end of the charging terminal 3 to limit the forward extreme position of the charging terminal 3. The charging terminal 3 is a circular terminal with a circular cross-section. A flat-shaped wiring connection piece 31 extending backward is provided on its rear end face. The wiring connection piece 31 is used to be bonded and welded to the end connection piece 61 for connecting the end of the cable 6, so as to realize the connection between the charging terminal 3 and the cable 6.

[0032] At the connection position between the charging terminal 3 and the cable 6, a charging terminal limiting sleeve 4 is also sleeved. The charging terminal limiting sleeve 4 includes a supporting sleeve body, the front end of the supporting sleeve body has a front supporting end, and the front supporting end is used to abut against the rear end face of the charging terminal 3. The inner cavity of the supporting sleeve body is used to accommodate the connecting part of the cable 6 and the charging terminal 3. In order to accommodate the inner cavity, the sleeve wall of the supporting sleeve body is provided with a stop spring 41 that gradually tilts outward from front to back. A radially inwardly protruding card platform 241 is provided on the inner wall of the terminal installation cavity 20. After the charging terminal limiting sleeve 4 is installed into the terminal installation cavity 20 from back to front, the rear end of the stop spring 41 is engaged with the card platform 241, so that it will not move backward relative to the terminal installation cavity 20. The rear end of the charging terminal 3 is supported by the charging terminal limiting sleeve 4, and the front end is blocked by the blocking inner flange 21, so that the charging terminal 3 is fixedly assembled in the terminal installation cavity 20.

[0033] The width of the wiring connection piece 31 is equal to the diameter of the charging terminal 3, so that a larger flow area can be provided to ensure the charging and discharging efficiency. The sleeve wall of the support sleeve is relatively provided with an escape groove 40 with a front opening, and the escape groove 40 is used to escape the wiring connection piece 31 and the end connection piece 61 welded thereto.

[0034] The socket housing 1 also includes a tail cover 5 assembly, which includes a tail cover 5 and a wire sealing body. The tail cover 5 is buckled on the rear end of the terminal installation cavity 20. The tail cover 5 is provided with a threading hole, and the cable 6 connected to the rear end of the charging terminal 3 passes through the threading hole. The wire sealing body is a set structure, which is tightly held on the cable 6 and has elastic deformation capability.

[0035] When the charging terminal 3 is wired, the cable 6 is passed through the threading hole of the tail cover 5, and then through the wire sealing body and the charging terminal limiting sleeve 4 in sequence, and is welded to the wiring connecting piece 31 at the rear end of the charging terminal 3, and then the cable 6 is pulled backward as a whole, so that the connection position of the charging terminal 3 and the cable 6 is retreated into the accommodating inner cavity of the charging terminal limiting sleeve 4. In this process, the two side edges of the wiring connecting piece 31 and the end connecting piece 61 in the width direction enter the avoidance groove 40 from front to back, and the wire sealing body is clamped between the charging terminal limiting sleeve 4 and the tail cover 5. The charging terminal 3, the charging terminal limiting sleeve 4, the cable 6 and the tail cover 5 components together form a terminal cable 6 wiring whole, which can be installed on the socket insulator 2 from back to front.

[0036] The structure of the charging terminal limit sleeve 4 is as follows Figure 5-8As shown, the anti-retreat elastic piece 41 is located on the sleeve wall between two avoidance grooves 40 and is symmetrically arranged. In the embodiment shown in the figure, there are two anti-retreat elastic pieces 41. In this way, each anti-retreat elastic piece 41 can have a relatively large circumferential dimension and relatively high structural strength. When the cable 6 is pulled backward to drive the charging terminal 3, it can withstand a relatively large pulling force. Of course, in other embodiments, the number of anti-retreat elastic pieces 41 can be four, that is, arranged in pairs symmetrically; or there can be only one anti-retreat elastic piece, arranged only on one side of the sleeve wall between the two avoidance grooves. In other embodiments without avoidance grooves, the number of anti-retreat elastic pieces can be freely selected, such as three, four or more.

[0037] The number of clamping platforms 241 provided on the inner wall of the terminal installation cavity 20 is equal to the number of anti-retreat elastic pieces 41. Moreover, in order to ensure reliable clamping, the clamping platforms 241 and the anti-retreat elastic pieces 41 need to be in corresponding positions in the circumferential direction. In this embodiment, a positioning recess extending from front to back is provided on the sleeve wall of the support sleeve body at the front side position of the anti-retreat elastic piece 41, as Figure 5-6 shown. The front side position of the anti-retreat elastic piece 41 is radially lower than the outer peripheral surface of the sleeve wall of the support sleeve body. This radially lower part forms the positioning recess. A positioning protrusion is provided on the inner wall of the terminal installation cavity 20. When the charging terminal 3 is inserted into the terminal installation cavity 20 from back to front, the positioning protrusion slides into the positioning recess, thereby positioning the charging terminal 3 in the circumferential direction and ensuring that the anti-retreat elastic piece 41 and the clamping protrusion can be aligned in the circumferential direction to achieve reliable clamping between the two. The outer edge of the front end of the support sleeve body has a guiding surface 42 with a gradually decreasing dimension from back to front, so as to facilitate the insertion of the charging terminal 3 into the terminal installation cavity 20 from back to front.

[0038] In the above embodiment, the charging socket is a dual-mode charging socket with two charging sockets, which can perform both DC charging and AC charging. In other embodiments, the charging socket can be a single-mode charging socket, that is, a DC charging socket with only one DC charging socket.

[0039] In the above embodiment, avoidance grooves 40 are provided on the sleeve wall of the support sleeve body to avoid the wiring connection piece 31 at the rear side of the charging terminal 3 and the end connection piece 61 at the end of the cable 6. In other embodiments, a welding pipe section extending backward is provided at the rear end of the charging terminal 3. The outer diameter of the welding pipe section is smaller than the outer diameter of the front end of the charging terminal 3. The front end of the cable 6 extends into the inner cavity of the welding pipe section and is welded to the cable 6. The support sleeve body is sleeved outside the welding pipe section. At this time, there is no need to provide avoidance grooves 40. Moreover, at this time, since the support sleeve body is a circumferentially complete sleeve structure, the number of anti-retreat elastic pieces 41 on the support sleeve body can be an odd number and can be evenly distributed in the circumferential direction.

[0040] In the above-described embodiment, the part on the inner wall of the terminal mounting cavity 20 that is engaged with the anti-retreat elastic piece 41 is a convex that protrudes from the inner wall of the terminal mounting cavity 20. During the process of inserting the charging terminal limiting sleeve 4 into the terminal mounting cavity 20 from the rear to the front, the end of the anti-retreat elastic piece 41 crosses the convex and is stuck on the front side of the convex after crossing it. In other embodiments, the part on the inner part of the terminal mounting cavity 20 that is engaged with the anti-retreat elastic piece 41 is a card slot. The card slot can be an independent card slot, and the number thereof is equal to the number of the anti-retreat elastic pieces 41, and the card slots correspond to the anti-retreat elastic pieces 41 one by one; or the card slot is an annular slot, and all the anti-retreat elastic pieces 41 can be inserted into the annular slot. At this time, it is not necessary to position the charging terminal 3 and the terminal mounting cavity 20 in the circumferential direction, that is, it is not necessary to provide a positioning recess and a positioning protrusion. When the card slot is used in cooperation with the anti-retreat elastic piece 41, since the slot wall of the card slot that is engaged with the anti-retreat elastic piece 41 is within the cavity wall of the terminal mounting cavity 20, the degree to which the rear end of the anti-retreat elastic piece 41 radially protrudes outward in the natural state is greater than the degree to which the anti-retreat elastic piece 41 radially protrudes outward when it is engaged with the convex in the above-described embodiment.

[0041] The embodiment of the charging terminal limiting sleeve of the present utility model has the same specific structure as the charging terminal limiting sleeve in the embodiment of the above-described charging socket, and will not be described in detail herein.

[0042] The above is only the preferred embodiment of the present utility model, and is not intended to limit the present utility model. The patent protection scope of the present utility model is subject to the claims. Any equivalent structural changes made by using the description and drawings of the present utility model shall be equally included in the protection scope of the present utility model.

Claims

1. The charging terminal limit sleeve is characterized by: The invention comprises a support sleeve, wherein the front end of the support sleeve has a front supporting end for abutting against the rear end of the charging terminal (3) to support the charging terminal (3) from the rear side thereof, the support sleeve has an accommodating inner cavity for accommodating the connecting portion between the cable (6) and the charging terminal (3), and a retaining spring (41) is provided on the sleeve wall of the support sleeve and is inclined to protrude outwards for clamping with the terminal installation cavity (20).

2. The charging terminal limit sleeve according to claim 1, characterized in that: The sleeve wall of the supporting sleeve body is provided with avoidance grooves (40) with a front opening, which are used to avoid a wiring connection piece (31) for connecting a cable (6) extending backward from the rear end of the charging terminal (3), and the stop spring piece (41) is located on the sleeve wall between the two avoidance grooves (40) and is symmetrically arranged.

3. The charging terminal limiting sleeve according to claim 2 is characterized in that: There are two anti-retraction spring pieces (41) to ensure the strength of each anti-retraction spring piece (41).

4. The charging terminal limiting sleeve according to claim 1, 2 or 3, characterized in that: The outer edge of the front end of the supporting sleeve is provided with a guide surface (42) for facilitating insertion into the terminal installation cavity (20).

5. A charging socket, characterized in that: The socket housing (1) comprises a socket insulator (2), a terminal installation cavity (20) for inserting a charging terminal (3) from the back to the front is provided in the socket insulator (2), the charging terminal (3) is inserted in the terminal installation cavity (20), a charging terminal limiting sleeve (4) is installed in the terminal installation cavity (20) and is sleeved on the outside of the connection position between the charging terminal (3) and the cable (6), the charging terminal limiting sleeve (4) comprises a supporting sleeve body, the front end of the supporting sleeve body has a front supporting end for abutting against the rear end of the charging terminal (3) so as to support the charging terminal (3) from the rear side, the sleeve wall of the supporting sleeve body is provided with a retaining spring (41) which is inclined and cantilevered outwards, and is clamped with the terminal installation cavity (20) through the retaining spring (41), and cooperates with the terminal installation cavity (20) to stop and limit the charging terminal (3) at the front side, so as to realize the fixed assembly of the charging terminal (3) in the terminal installation cavity (20).

6. The charging socket according to claim 5, characterized in that: The rear end of the charging terminal (3) is provided with a wiring connection piece (31) extending backwards for connecting the cable (6), and is connected to the end of the cable (6) via the wiring connection piece (31). Avoidance grooves (40) with front openings are arranged on the sleeve wall of the supporting sleeve body to avoid the two side edges of the wiring connection piece (31). The stop spring (41) is located on the sleeve wall between the two avoidance grooves (40) and is symmetrically arranged.

7. The charging socket according to claim 6, characterized in that: There are two anti-retraction spring pieces (41) to ensure the strength of each anti-retraction spring piece (41).

8. The charging socket according to claim 5, 6 or 7, characterized in that: The outer edge of the front end of the supporting sleeve is provided with a guide surface (42) for facilitating insertion into the terminal installation cavity (20).

9. The charging socket according to claim 5, 6 or 7, characterized in that: An insulator mounting cavity (10) is provided in the socket housing (1), and the socket insulator (2) is inserted into the insulator mounting cavity (10) along the front-to-back direction and the rear end extends out of the insulator mounting cavity (10), so that the charging terminal (3) can be directly inserted into the terminal mounting cavity (20) from the back to the front after the wiring is completed.

10. The charging socket according to claim 9, characterized in that: The socket housing (1) comprises a tail cover (5) assembly mounted at the rear end of the terminal installation cavity (20) and through which the cable (6) passes front and back, the tail cover (5) assembly comprising a tail cover (5) buckled on the rear end of the terminal installation cavity (20) and a wire sealing body clamped between the tail cover (5) and the rear end of the charging terminal limit sleeve (4) to achieve tail sealing.

Images