Charging gun shell mechanism and assembling method thereof

Abstract

The invention discloses a charging gun shell mechanism and an assembling method thereof.The charging gun shell mechanism comprises a handle body and an end cover assembly, a wire clamp is further arranged in the handle body, and a containing cavity comprises a conical hole, a mounting cavity located on one side of the conical hole and a storage cavity located on the other side of the conical hole; the wire clamp comprises an annular disc and a plurality of elastic claw toes, the annular disc is arranged in the mounting cavity, the two ends of the annular disc abut against the handle body and the end cover assembly respectively, the elastic claw toes are arranged at one end of the annular disc in the circumferential direction and extend into the conical hole, the outer sides of the elastic claw toes abut against the hole wall of the conical hole, and the inner sides of the elastic claw toes are used for clamping the wire harness. The wire harness fixing mechanism has the advantages that the wire harness does not need to be fixed to the wire clamp firstly, the wire harness directly penetrates through the wire clamp located in the handle body, then the wire clamp is pushed to enable claw toes of the wire clamp to be extruded by the hole wall of the conical hole to tightly hold the wire harness, the whole mechanism can fix the wire harness, the assembly process is simple, operation steps can be reduced, and the production efficiency is improved. The working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of charging guns, specifically to a charging gun housing mechanism and its assembly method. Background Technology

[0002] A charging gun is a mechanism used to charge new energy vehicles. An electrical module is installed inside the charging gun, and the wiring harness of this module needs to be led out of the charging gun to connect to the charging pile. During the process of placing and removing the charging gun, the wiring harness may loosen relative to the outer casing while being dragged, causing the wiring harness to detach from the electrical module. To prevent the wiring harness from detaching from the electrical module, a common method is to install a clamping mechanism inside the outer casing to fix the wiring harness in place. The clamping mechanism often uses a clamp-like design to fix the wiring harness to the outer casing, thus making the wiring harness and the outer casing an integral part and reducing the probability of detachment. However, the current clamp-like design requires first fixing the wiring harness to the clamp, and then using bolts or other connectors to fix the clamp to the outer casing. The entire assembly process is inconvenient and inefficient.

[0003] For example, Chinese Patent CN209860240U discloses a wire clamp, which includes a fixed frame that is fixed and immovable, and a movable member that is housed in the fixed frame and can move relative to the fixed frame. The fixed frame includes a shell, a receiving cavity opened in the shell for accommodating the movable member, a wire hole extending longitudinally through the shell, an opening on the bottom side of the shell for inserting the movable member into the receiving cavity, and a fixing hole opened on the top of the shell and communicating with the receiving cavity. The movable member includes a base portion, a wire hole extending longitudinally through the base portion, and a pushing surface provided on the base portion at the position corresponding to the fixing hole of the fixed frame. A pushing member passes through the fixing hole to push the base portion so that the two sides of the cable located in the wire hole are clamped by the fixed frame and the inner side of the wire hole of the movable member, respectively. During the assembly of the charging gun, the aforementioned wire clamp requires first inserting the movable part into the receiving cavity of the fixed frame; then, fitting the wire clamp onto the cable and then inserting it into the rear end of the housing; next, fitting the flexible fixed coil with the bracket onto the cable and then inserting the head into the housing, positioning it at the rear end of the wire clamp; finally, tightening the bolts. This entire process requires fixing the wire harness to the wire clamp first, which is inconvenient and results in low assembly efficiency.

[0004] Therefore, it is necessary to provide a charging gun housing mechanism and its assembly method. Summary of the Invention

[0005] The present invention provides a charging gun housing mechanism and its assembly method, which effectively solves the problem of inconvenient operation when assembling the existing charging gun with the wire harness fixing structure.

[0006] The technical solution adopted in this invention is:

[0007] A charging gun housing mechanism includes a handle body with a receiving cavity and an end cap assembly disposed at the tail end of the handle body and communicating with the receiving cavity. The handle body also has a wire clamp. The receiving cavity includes a conical hole, a mounting cavity located on one side of the conical hole, and a storage cavity located on the other side of the conical hole. The wire clamp includes an annular disk disposed in the mounting cavity and abutting the handle body and the end cap assembly at both ends, and a plurality of elastic claws circumferentially disposed at one end of the annular disk. The elastic claws extend into the conical hole, and the outer sides of the elastic claws abut against the hole wall of the conical hole. The inner sides of the plurality of elastic claws are used to clamp the wire harness.

[0008] Furthermore, the end cap assembly includes a tail cap with a first through hole, a sealing gasket with a second through hole, and a tail plug with a third through hole. The two ends of the tail plug abut against the sealing gasket and the tail cap, respectively. The sealing gasket abuts against the annular disc. The first, second, and third through holes are interconnected. The tail plug includes a symmetrical upper tail plug clamp and a lower tail plug clamp, and a bolt connecting the upper and lower tail plug clamps. The upper and lower tail plug clamps form the third through hole when closed. The tail plug is provided with a first annular groove and a first annular protrusion. The tail cap is provided with a second annular protrusion that mates with the first annular groove and a second annular groove that mates with the first annular protrusion.

[0009] Furthermore, the handle body includes a housing and several studs disposed within the housing. The studs are provided with a first screw hole with an opening facing the end cap assembly. A first screw is disposed between the handle body and the end cap. The tail cap is provided with a countersunk hole corresponding to the first screw hole.

[0010] Furthermore, the annular disc, sealing gasket, and tail plug are all provided with clearance through holes that correspond one-to-one with the studs.

[0011] Furthermore, the tapered hole narrows away from the tail cap assembly, and the elastic claw includes a claw body disposed on the annular disc and a clamping head disposed on the inner side of the claw body away from the annular disc, and the inner side of the clamping head is provided with several textures.

[0012] Furthermore, the tip of the elastic claw does not protrude from the tapered hole.

[0013] Furthermore, the No. 1 through hole, the No. 2 through hole, and the No. 3 through hole are concentric with the tapered hole.

[0014] Furthermore, the sealing gasket includes a gasket body and several protruding rings disposed on the outer periphery of the gasket body.

[0015] Furthermore, the inner convex ring is used to compress the outer wall of the wire harness passing through the gasket body, thereby achieving a seal between the wire harness and the sealing gasket.

[0016] The charging gun housing assembly method, using the aforementioned charging gun housing mechanism, includes the following steps: S1, the wire clamp is pre-installed in the handle body, at which point the elastic claws are not squeezed by the inner wall of the conical hole; S2, after the electrical module is installed in the receiving cavity, the wire harness of the electrical module passes through the conical hole and the annular disc, so that several elastic claws are located on the outer periphery of the wire harness; S3, the end cap assembly is used to squeeze the annular disc, causing the annular disc to drive the elastic claws to move relative to the inner wall of the conical hole, and the inner wall of the conical hole squeezes the elastic claws, causing the elastic claws to contract towards the center of the annular disc from the side away from the annular disc and clamp the wire harness, and then the end cap assembly is assembled with the handle body.

[0017] Beneficial effects of the invention:

[0018] 1. The wire harness does not need to be fixed to the wire clamp beforehand. Instead, the wire harness passes directly through the wire clamp located inside the handle body. Then, pushing the wire clamp causes the claws of the wire clamp to be squeezed by the wall of the tapered hole, thus clamping the wire harness. The entire mechanism can not only fix the wire harness, but also simplify the assembly process, reduce operation steps, and improve work efficiency.

[0019] 2. The sealing gasket is designed with an inner convex ring. By controlling the protrusion height of the inner convex ring, the size of the inner convex ring is made to meet the conditions for the inner convex ring to be squeezed against the outer wall of the wire harness. The deformation of the inner convex ring after squeezing achieves a seal between the inner convex ring and the wire harness, ensuring that external moisture will not enter the charging gun in large quantities through the gap between the sealing gasket and the wire harness when the charging gun is in use.

[0020] 3. The handle body is equipped with studs, and the annular disc, sealing gasket, and tail plug are all equipped with clearance holes that correspond one-to-one with the studs. This ensures that after the handle body, annular disc, sealing gasket, and tail plug are assembled, the annular disc, sealing gasket, and tail plug will not rotate relative to the handle body.

[0021] 4. By creating textured surfaces on the clamping head of the elastic claw toes, the surface of the clamping head becomes rougher, increasing the friction between the clamping head and the wire harness upon contact, thus enhancing the binding force on the wire harness. Attached Figure Description

[0022] Figure 1 An exploded view of a charging gun housing mechanism provided for an embodiment of this application.

[0023] Figure 2 An exploded view of a charging gun housing mechanism provided for an embodiment of this application, omitting the handle body.

[0024] Figure 3 This is an overall schematic diagram of a charging gun housing mechanism provided for an embodiment of this application.

[0025] Figure 4 For along Figure 3 Sectional view of AA.

[0026] Figure 5 This is a schematic diagram of the handle of a charging gun housing mechanism provided for an embodiment of this application.

[0027] The markings in the diagram are as follows: 1. Handle body; 2. End cap assembly; 3. Cable clamp; 101. Tapered hole; 102. Mounting cavity; 103. Storage cavity; 31. Annular disc; 32. Elastic claw toe; 21. Tail cap; 22. Sealing gasket; 23. Tail plug; 210. Through hole No. 1; 220. Through hole No. 2; 230. Through hole No. 3; 231. Upper tail plug clamp; 232. Lower tail plug clamp; 200. Annular protrusion No. 1; 212. Annular protrusion No. 2; 203. Mounting hole No. 2; 104. Screw hole No. 1; 11. Housing; 12. Stud; 300. Clearance through hole; 321. Claw body; 322. Clamping head; 323. Texture; 221. Pad body; 222. Outer convex ring; 223. Inner convex ring; 211. Countersunk hole; 105. Step. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 , Figure 2 As shown in the figure, this application provides a first embodiment, which is a charging gun housing mechanism. The structure includes a handle body 1 with a receiving cavity and an end cap assembly 2 disposed at the tail end of the handle body 1 and communicating with the receiving cavity. A wire clamp 3 is also disposed inside the handle body 1. The receiving cavity includes a conical hole 101, a mounting cavity 102 located on one side of the conical hole 101, and a storage cavity 103 located on the other side of the conical hole 101. The wire clamp 3 includes an annular disk 31 disposed in the mounting cavity 102 and abutting against the handle body 1 and the end cap assembly 2 at both ends, and a plurality of elastic claws 32 circumferentially disposed at one end of the annular disk 31. The elastic claws 32 extend into the conical hole 101, and the outer side of the elastic claws 32 abuts against the hole wall of the conical hole 101. The inner side of the plurality of elastic claws 32 is used to clamp the wire harness.

[0030] It should be noted that the diameter of the mounting cavity 102 is larger than the inner diameter of the tapered hole 101, and a step 105 is formed between the mounting cavity 102 and the tapered hole 101.

[0031] During actual assembly, the wire clamp 3 is pre-installed inside the handle body 1. At this time, the elastic claws 32 are not squeezed by the conical hole 101, and the end cap assembly 2 is not installed with the handle body 1. After the electrical module is installed inside the handle body 1, the wiring harness of the electrical module enters between several elastic claws 32 along the conical hole 101 and passes through the center of the annular disk 31. Then, the end cap assembly 2 is assembled. The end cap assembly 2 squeezes the annular disk 31, causing the annular disk 31 to drive several elastic claws 32 into the conical hole 101. During the process of entering the conical hole 101, the outer surfaces of several elastic claws 32 are squeezed by the wall of the conical hole 101, causing the elastic claws 32 to contract inward. After contraction, several elastic claws 32 clamp the wiring harness from the circumference. After clamping, one end of the annular disk 31 abuts against the step 105 at the connection between the conical hole 101 and the mounting cavity 102, and the other end is fixed by the end cap assembly 2. During the movement of the charging gun, the wire harness is held by the wire clamp 3 to ensure that the wire harness moves synchronously with the handle body 1.

[0032] In the above design, the entire assembly process does not require the wiring harness to be fixed in advance, making the assembly of the entire charging gun more convenient.

[0033] Specifically: such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the end cap assembly 2 includes a tail cap 21 with a first through hole 210, a sealing gasket 22 with a second through hole 220, and a tail plug 23 with a third through hole 230. The two ends of the tail plug 23 abut against the sealing gasket 22 and the tail cap 21, respectively. The sealing gasket 22 abuts against the annular disc 31. The first through hole 210, the second through hole 220, and the third through hole 230 are connected. The tail plug 23 includes an upper tail plug clamp 231 and a lower tail plug clamp 232, and a second screw connecting the upper tail plug clamp 231 and the lower tail plug clamp 232. When the upper tail plug clamp 231 and the lower tail plug clamp 232 are closed, they form the third through hole 230. The tail plug 23 is provided with a first annular groove and a first annular protrusion 200. The tail cap 21 is provided with a second annular protrusion 212 that mates with the first annular groove and a second annular groove that mates with the first annular protrusion 200. The upper tail plug clamp 231 is provided with two No. 2 screw holes, and the lower tail plug clamp 232 is provided with a No. 2 mounting hole 203 corresponding to the No. 2 screw holes.

[0034] During actual assembly, the sealing gasket 22 is first placed in the mounting cavity 102. The tail cap 21 is first assembled with the upper tail plug clamp 231 and the lower tail plug clamp 232 respectively, so that the first annular groove mates with the second annular protrusion 212, and the first annular protrusion 200 mates with the second annular groove. Then, the second screw passes through the second mounting hole 203 and is threaded into the corresponding second screw hole, realizing the closing of the upper tail plug clamp 231 and the lower tail plug clamp 232. Then, the tail plug 23 and the tail cap 21 are inserted into the mounting cavity 102, so that the tail plug 23 presses the sealing gasket 22 against the annular disc 31.

[0035] In the above design, the structural design and specific implementation of the end cap assembly 2 can achieve the tight sealing of the annular disk 31.

[0036] Specifically: such as Figure 5 As shown, the handle body 1 includes a housing 11 and a plurality of studs 12 disposed in the housing 11. The studs 12 are provided with a first screw hole 104 with the opening facing the end cap assembly 2. A first screw is provided between the handle body 1 and the end cap. The tail cap 21 is provided with a countersunk hole 211 corresponding to the first screw hole 104.

[0037] During actual assembly, after the end cap assembly 2 extends into the predetermined position of the mounting cavity 102, it is fixed to the handle body 1 by passing a screw through the screw hole 104.

[0038] In the above design, the handle body 1 and the end cap assembly 2 are quick and easy to fix. It is only necessary to tighten the first bolt and the first screw hole 104, which facilitates the disassembly and assembly of the end cap assembly 2.

[0039] Specifically: such as Figure 2 As shown, the annular disk 31, the sealing gasket 22, and the tail plug 23 are all provided with clearance through holes 300 corresponding to the studs 12.

[0040] During actual assembly, the clearance through hole 300 of the annular disc 31 is assembled before the stud 12, then the clearance through hole 300 of the sealing gasket 22 is assembled with the stud 12, and then the clearance through hole 300 of the tail plug 23 is assembled with the stud 12.

[0041] In the above design, by setting the clearance through hole 300, the annular disc 31, the sealing gasket 22, and the tail plug 23 can all be positioned with the stud 12, which can prevent the annular disc 31, the sealing gasket 22, and the tail plug 23 from rotating inside the handle body 1 and improve the assembly accuracy.

[0042] Specifically: such as Figure 4 and Figure 5As shown, the tapered hole 101 retracts towards the side away from the tail cap 21 assembly, and the elastic claw toe 32 includes a claw body 321 disposed on the annular disk 31 and a pressing head 322 disposed on the inner side of the claw body 321 away from the annular disk 31. The inner side of the pressing head 322 is provided with several textures 323.

[0043] During actual assembly, as the annular disc 31 is pressed against the tapered hole 101, the claw body 321 is pressed by the wall of the tapered hole 101, which drives the clamping head 322 to clamp the wire harness.

[0044] In the above design, by setting texture 323 on the clamping head 322, the surface of the clamping head 322 is rough, which increases the friction between the clamping head 322 and the wire harness after contacting the wire harness, thereby improving the binding force on the wire harness.

[0045] Specifically: such as Figure 4 As shown, the end of the elastic claw toe 32 does not extend out of the tapered hole 101.

[0046] In the above design, the elastic claw toe 32 not protruding from the conical hole 101 can ensure that the elastic claw toe 32 is squeezed by the conical hole 101 to clamp the wire harness.

[0047] Specifically, the first through hole 210, the second through hole 220, and the third through hole 230 are concentric with the tapered hole 101.

[0048] In the above design, the first through hole 210, the second through hole 220, and the third through hole 230 are concentric with the tapered hole 101 so that the wire harness can pass through the second through hole 220, the third through hole 230 and the first through hole 210 in sequence along the tapered through hole.

[0049] Specifically: such as Figure 2 As shown, the sealing gasket 22 includes an annular gasket body 221, a plurality of externally protruding rings 222 disposed on the outer periphery of the gasket body 221, and a plurality of internally protruding rings 223 disposed on the inner periphery of the gasket body 221. The diameter of the internally protruding rings 223 is smaller than the diameter of the wire harness.

[0050] During actual assembly, when the wire harness passes through the sealing gasket 22, it compresses the inner convex ring 223. The deformation of the inner convex ring 223 achieves a tight contact between the sealing gasket 22 and the wire harness to form a seal. The outer convex ring 222 achieves a seal between the sealing gasket 22 and the handle body 1 by contacting the inner wall of the mounting cavity 102.

[0051] In the above design, the structural design and specific implementation of the sealing gasket 22 can form a seal between the wire harness and the handle body 1, so that external moisture enters the conical block along one side of the end cap assembly 2.

[0052] Specifically, the inner convex ring 223 is used to squeeze the outer wall of the wire harness passing through the pad body 221 to achieve a seal between the wire harness and the sealing pad 22.

[0053] The second embodiment provided in this application is a charging gun housing assembly method, which adopts the charging gun housing mechanism and includes the following steps: S1, the wire clamp 3 is pre-installed in the handle body 1, at which time the elastic claws 32 are not squeezed by the inner wall of the conical hole 101; S2, after the electrical module is installed in the receiving cavity, the wire harness of the electrical module passes through the conical hole 101 and the annular disk 31, so that several elastic claws 32 are located on the outer periphery of the wire harness; S3, the end cap assembly 2 is used to squeeze the annular disk 31, so that the annular disk 31 drives the elastic claws 32 to generate relative movement with the inner wall of the conical hole 101, and the inner wall of the conical hole 101 squeezes the elastic claws 32, so that the elastic claws 32 on the side away from the annular disk 31 retract towards the center of the ring and clamp the wire harness, and then the end cap assembly 2 is assembled with the handle body 1.

[0054] In the above design, when assembling the charging gun housing, it is no longer necessary to use separate wire clamps to fix the wire harness, and the steps of fixing the wire clamps to the wire harness and the wire clamps to the housing are also eliminated, making assembly easier and saving more time.

[0055] In further detail, it should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A charging gun housing mechanism, comprising a handle body (1) having a receiving cavity and an end cap assembly (2) disposed at the tail end of the handle body (1) and communicating with the receiving cavity, characterized in that: The handle body (1) is also provided with a wire clamp (3). The receiving cavity includes a conical hole (101), an installation cavity (102) located on one side of the conical hole (101), and a storage cavity (103) located on the other side of the conical hole (101). The wire clamp (3) includes an annular disk (31) disposed in the installation cavity (102) and whose two ends respectively abut against the handle body (1) and the end cap assembly (2), and a plurality of elastic claws (32) circumferentially disposed at one end of the annular disk (31). The elastic claws (32) extend into the conical hole (101), and the outer side of the elastic claws (32) abuts against the hole wall of the conical hole (101). The inner side of the plurality of elastic claws (32) is used to clamp the wire harness.

2. The charging gun housing mechanism according to claim 1, characterized in that: The end cap assembly (2) includes a tail cap (21) with a first through hole (210), a sealing gasket (22) with a second through hole (220), and a tail plug (23) with a third through hole (230). The two ends of the tail plug (23) abut against the sealing gasket (22) and the tail cap (21) respectively. The sealing gasket (22) abuts against the annular disc (31). The first through hole (210), the second through hole (220), and the third through hole (230) are connected. The tail plug (23) includes an upper tail plug clamp (231) and a lower tail plug clamp (232) connected to the upper tail plug. The upper tail plug clamp (231) and the lower tail plug clamp (232) are fitted with screws of the second number. When the upper tail plug clamp (231) and the lower tail plug clamp (232) are closed, they form a through hole (230) of the third number. The tail plug (23) is provided with an annular groove of the first number and an annular protrusion of the first number (200). The tail cap (21) is provided with an annular protrusion of the second number (212) that mates with the annular groove of the first number and an annular groove of the second number that mates with the annular protrusion of the first number (200). The upper tail plug clamp (231) is provided with two screw holes of the second number. The lower tail plug clamp (232) is provided with a mounting hole of the second number (203) that corresponds to the screw holes of the second number.

3. The charging gun housing mechanism according to claim 1, characterized in that: The handle body (1) includes a housing (11) and a number of studs (12) disposed in the housing (11). The studs (12) are provided with a first screw hole (104) with the opening facing the end cap assembly (2). A first screw is provided between the handle body (1) and the end cap. The tail cap (21) is provided with a countersunk hole (211) corresponding to the first screw hole (104).

4. The charging gun housing mechanism according to claim 3, characterized in that: The annular disc (31), sealing gasket (22) and tail plug (23) are all provided with clearance through holes (300) corresponding one-to-one with the stud (12).

5. The charging gun housing mechanism according to claim 1, characterized in that: The tapered hole (101) retracts away from the tail cap (21) assembly. The elastic claw (32) includes a claw body (321) disposed on the annular disk (31) and a clamping head (322) disposed on the inner side of the claw body (321) away from the annular disk (31). The inner side of the clamping head (322) is provided with several textures (323).

6. The charging gun housing mechanism according to claim 1, characterized in that: The end of the elastic claw (32) does not protrude from the tapered hole (101).

7. The charging gun housing mechanism according to claim 2, characterized in that: The No. 1 through hole (210), No. 2 through hole (220), and No. 3 through hole (230) are concentric with the tapered hole (101).

8. The charging gun housing mechanism according to claim 2, characterized in that: The sealing gasket (22) includes an annular gasket body (221), a plurality of outer protruding rings (222) disposed on the outer periphery of the gasket body (221), and a plurality of inner protruding rings (223) disposed on the inner periphery of the gasket body (221).

9. The charging gun housing mechanism according to claim 8, characterized in that: The inner convex ring (223) is used to squeeze the outer wall of the wire harness passing through the pad body (221) to achieve a seal between the wire harness and the sealing pad (22).

10. A method for assembling a charging gun housing, using the charging gun housing mechanism described in any one of claims 1 to 9, characterized in that: The process includes the following steps: S1, the wire clamp (3) is pre-installed in the handle body (1), at which time the elastic claws (32) are not squeezed by the inner wall of the conical hole (101); S2, after the electrical module is installed in the receiving cavity, the wire harness of the electrical module passes through the conical hole (101) and the annular disk (31), so that several elastic claws (32) are located on the outer periphery of the wire harness; S3, the end cap assembly (2) squeezes the annular disk (31), so that the annular disk (31) drives the elastic claws (32) to move relative to the inner wall of the conical hole (101), and the inner wall of the conical hole (101) squeezes the elastic claws (32), so that the elastic claws (32) retract towards the center of the ring on the side away from the annular disk (31) and clamp the wire harness, and then the end cap assembly (2) and the handle body (1) are assembled.

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