Elbow plug connector and assembly method thereof

Abstract

An elbow plug connector comprises a housing 1 comprising first (figure 3, 11) and second (figure 3, 12) receiving cavities being at an angle to each other. A mounting area (figure 4, 13) is formed at

Description

mi^ a i Trnrr n 1 JtLVJHLIn 1V / ztlJLj Ju IJiLijJL / The present disclosure relates to the technical field of connectors, in particular to an elbow plug connector and an assembly method thereof. BACKGROUND An electronic connector plays a vital role in an electrical connection between wires, and can ensure a stable transmission of electrical signals. In order to meet requirements of installation, elbow connectors are commonly seen in the market. Elbow connectors are usually used to solve the problem of angle changes between wires, making connections more flexible and convenient. Although being useful in many applications, elbow connectors are not easy to make, which is why elbow connectors are relatively expensive. The elbow connectors currently used by most electric vehicles (EVs) on the market have some more complex problems. First of all, since an elbow connector has a plug portion of an elbow design , a terminal structure thereof is relatively complex and requires a complex molding and assembly process to manufacture, which increases the difficulty and cost of manufacturing. In addition, a structure and a manufacturing process of an elbow connector are also relatively complex, which increases a difficulty of assembly, a production cycle and a scrap rate, and leads to an increase in overall manufacturing costs. SUMMARY In order to overcome the problems of complex structures, manufacturing processes and high manufacturing costs of plugs in elbow connectors, the present disclosure provides an elbow plug connector and an assembly method thereof. Technical schemes of the present disclosure are as follows. In a first aspect of the present disclosure, an embodiment provides an elbow plug connector, including: a housing, including a first receiving cavity and a second receiving cavity, the first receiving cavity and the second receiving cavity being at an angle, and a mounting area being formed at an intersection of the first receiving cavity and the second receiving cavity; a rubber core assembly, including a cable and a wiring terminal arranged in the first receiving cavity, the wiring terminal including a wiring portion and a first fixing portion, the wiring portion being connected to the cable, and the first fixing portion extending into the mounting area; a docking terminal arranged in the second receiving cavity and including a contact portion configured to dock with a socket terminal and a second fixing portion extending into the mounting area and overlapping the first fixing portion; and a fixing assembly, arranged in the mounting area and including a limiting member and a locking member, the second fixing portion and the first fixing portion being clamped between the limiting member and the locking member. Compared with the related art, the beneficial effects of the present disclosure are as follows. 1. By providing the mounting area, the first fixing portion of the wiring terminal and the second fixing portion of the docking terminal can extend into the mounting area from two directions of the elbow plug connector and overlap to achieve an electrical communication between the wiring terminal and the docking terminal which are at an angle in the elbow plug connector, and a connecting structure and a manufacturing process are simple. 2. The first fixing portion and the second fixing portion can be fixed together through the limiting member and the locking member, so as to fix the wiring terminal and the docking terminal. A fixing structure and a manufacturing process are simple, so as to reduce the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical schemes in embodiments of the present disclosure, the accompanying drawings necessary to be used in the description of the embodiments or related art will be briefly described below. FIG. lisa schematic structural view of the present disclosure; FIG. 2 is an exploded view of the present disclosure; FIG. 3 is a cross-sectional view along A-A in FIG. 1; FIG. 4 is a cross-sectional view along B-B in FIG. 1; FIG. 5 is a cross-sectional view along C-C in FIG. 1; FIG. 6 is a cross-sectional view along D-D in FIG. 1; FIG. 7 is a schematic structural view of a housing in the present disclosure; FIG. 8 is a schematic structural view of the housing in the present disclosure from another perspective; FIG. 9 is a cross-sectional view along E-E in FIG. 7; FIG. 10 is a cross-sectional view along F-F in FIG. 7; FIG. 11 is a schematic structural view of a sealing cover in the present disclosure; FIG. 12 is a schematic structural view of a docking terminal in the present disclosure; FIG. 13 is a schematic structural view of a front cover in the present disclosure; and FIG. 14 is a schematic structural view of a rear cover in the present disclosure. DETAILED DESCRIPTION Referring to FIGS. 1 to 10, an embodiment provides an elbow plug connector, including a housing 1, a rubber core assembly 2, at least one docking terminal 3, and a fixing assembly. The housing 1 has a first receiving cavity 11 and a second receiving cavity 12. The first receiving cavity 11 and the second receiving cavity 12 are at an angle, and a mounting area 13 is formed at an intersection of the first receiving cavity 11 and the second receiving cavity 12. The rubber core assembly 2 includes at least one cable 21 and at least one wiring terminal 22 which is arranged in the first receiving cavity 11. The wiring terminal 22 includes a wiring portion 221 and a first fixing portion 222. The wiring portion 221 is connected to the cable 21, and the first fixing portion 222 extends into the mounting area 13. The docking terminal 3 is arranged in the second receiving cavity 12, and includes a contact portion configured to dock with a socket terminal and a second fixing portion 313 extending into the mounting area 13 and at least partially overlapping with the first fixing portion 222. The fixing assembly is arranged in the mounting area 13, and includes a limiting member 4 and a locking member 5. The second fixing portion 313 and the first fixing portion 222 are clamped between the limiting member 4 and the locking member 5. In the present disclosure, the mounting area 13 is arranged in such way that the first fixing portion 222 of the wiring terminal 22 and the second fixing portion 313 of the docking terminal 3 can extend into the mounting area 13 from two directions of the elbow plug connector and at least partially overlap with each other to achieve an electrical connection between the wiring terminal 22 and the docking terminal 3 which are at an angle in the elbow plug connector. The first fixing portion 222 and the second fixing portion 313 can be fixed together through the limiting member 4 and the locking member 5, thereby fixing the wiring terminal 22 and the docking terminal 3 in the elbow plug connector. Referring to FIGS. 2 to 10, in an embodiment, the housing 1 includes a mounting hole 14 arranged in a direction perpendicular to the first receiving cavity 11 and the second receiving cavity 12, and the mounting hole 14 extends to the mounting area 13. The first fixing portion 222 and the second fixing portion 313 overlap in an axial direction of the mounting hole 14. The first fixing portion 222 includes a first through hole 2221 arranged in the axial direction of the mounting hole 14. The second fixing portion 313 includes a second through hole 3131 arranged in the axial direction of the mounting hole 14. The first through hole 2221 and the second through hole 3131 completely overlap in the axial direction of the mounting hole 14. The locking member 5 includes a base 51 and a connecting rod 52 protruding inwardly from the base 51. The connecting rod 52 passes through the first through hole 2221 and the second through hole 3131 and then is connected to the limit member 4 to clamp the second fixing portion 313 and the first fixing portion 222 between the base 51 and the limit member 4, thereby firmly fixing the first fixing portion 222 and the second fixing portion 313 together. The elbow plug connector has a simple fixing structure and is easy to operate. In addition, the mounting hole 14 is covered with a sealing cover 6 to seal the mounting hole 14 after the locking member 5 locks the second fixing portion 313 and the first fixing portion 222, so as to achieve sealing when the elbow plug connector is ready to be used, and a good sealing effect is achieved without a complicated glue filling process. Referring to FIGS. 2, 5 and 9 to 11, specifically, the sealing cover 6 includes a cover plate 61, an annular first connecting portion 62 protruding inwardly from the cover plate 61, and a plurality of elastic arms 63 protruding inwardly from the first connecting portion 62. Each of the plurality of elastic arms 63 is provided with a buckle 64 at an end thereof. The first connecting portion 62 is concave to form a first sealing ring groove 621. The mounting hole 14 includes a first receiving hole 141 and a second receiving hole 142. The second receiving hole 142 communicates with the first receiving hole 141 and the mounting area 13. Amounting step 143 is formed between the first receiving hole 141 and the second receiving hole 142. The cover plate 61 is received in the first receiving hole 141 and abuts against the mounting step 143. The second receiving hole 142 includes a first hole section 1421 close to the first receiving hole 141 and a second hole section 1422 close to the mounting area 13. The second hole section 1422 has an aperture that tapers from the first receiving hole 141 towards the mounting area 13. A first resisting portion 144 is formed by an end surface of the second hole section 1422. The buckle 64 passes through the second receiving hole 142 and then is snapped into the first resisting portion 144. A first sealing ring 622 is arranged between the first sealing ring groove 621 and the first hole section 1421, so as to form sealing between the mounting hole 14 and the mounting area 13. With regard to the setting of the above sealing cover 6 and mounting hole 14, by setting the aperture of the second hole section 1422 gradually smaller from outside to inside, the first resisting portion 144 and the buckle 64 have a larger matching area and the two are engaged stronger. It also makes it easier for the plurality of elastic arms 63 to enter the mounting area 13 from the second receiving hole 142 to be engaged with the first resisting portion 144. The plurality of elastic arms 63 and the buckle 64 at the end of each of the plurality of elastic arms 63 are arranged in such way that when the sealing cover 6 is assembled into the second receiving hole 142, the buckle 64 is squeezed by a side wall of the second receiving hole 142 and closes with the elastic arms 63, so as to pass through the second receiving hole 142 smoothly. In an embodiment, the limiting member 4 is a hexagonal nut, and the locking member 5 is a bolt which passes through the first through hole 2221 and the second through hole 3131 to be screwed with the nut. The bolt can be easily screwed into the nut with a screwdriver, so as to firmly fix the first fixing portion 222 and the second fixing portion 313 together. Referring to FIGS. 4 and 7 to 10, in an embodiment, a plurality of first limiting convex ribs 121 are arranged in the second receiving cavity 12. The docking terminal 3 is clamped between a pair of the first limiting convex ribs 121 oppositely arranged, one end of each of the first limit convex ribs 121 extends to the mounting area 13. The second fixing portion 313 and the first fixing portion 222 are clamped between the limiting member 4 and the first limiting convex ribs 121, so that the first fixing portion 222 and the second fixing portion 313 can remain overlapped after the wiring terminal 22 and the docking terminal 3 are assembled into the housing 1. A plurality of second limiting convex ribs 111 are arranged in the first receiving cavity 11. The wiring terminal 22 is clamped between a pair of the second limiting convex ribs 111 oppositely arranged, and the second limiting convex ribs 111 extend to the mounting area 13 and abut against the second fixing portion 313, so that the second fixing portion 313 is limited in the mounting area 13 after the docking terminal 3 is assembled into the housing 1. Referring to FIGS. 3, 4 and 12, in an embodiment, the docking terminal 3 is a high-current clamp terminal, which includes a first clamping piece 31, a second clamping piece 32 opposite to the first clamping piece 31, and a second connecting portion 33 between the first clamping piece 31 and the second clamping piece 32. The first clamping piece 31 includes a first main body portion 311. A first clamping terminal 312 extends from one end of the first main body portion 311. The second fixing portion 313 is provided at the other end of the first main body portion 311. The second clamping piece 32 includes a second main body portion 321. The second main body portion 321 and the first main body portion 311 are arranged side by side in a direction of their plate surfaces. The second main body portion 321 is connected to the first main body portion 311 by the second connecting portion 33. A second clamping terminal 322 extends from one end of the second main body portion 321. The first clamping terminal 312 and the second clamping terminal 322 form the contact portion. The first clamping terminal 312 and the second clamping terminal 322 are configured to jointly clamping a terminal portion of the socket terminal. The first fixing portion 222 of the wiring terminal 22 is arranged between the first clamping piece 31 and the second clamping piece 32. A space between the first clamping piece 31 and the second clamping piece 32 is fully utilized to place the first fixing portion 222, so as to reduce a design space of the elbow plug connector in the axial direction of the mounting hole 14. Referring to FIGS. 4 and 8 to 10, further, the mounting area 13 includes a limiting groove 131 configured to install the limiting member 4. A shape of the limiting groove 131 matches the limiting member 4 to avoid a rotation of the limiting member 4 when the locking member 5 is connected to the limiting member 4. The limiting groove 131 communicates with the second receiving cavity 12. The second main body portion 321 has a second resisting portion 3211 opposite to the limiting groove 131 and against the limiting member 4. The second resisting portion 3211 matches a shape of the limiting member 4. The second resisting portion 3211, together with the limiting groove 131, limits the limiting member 4 within the mounting area 13. Referring to FIGS. 1, 2, 6 and 13, in an embodiment, the elbow plug connector further includes a front cover 7 and a second sealing ring 8. The housing 1 has a first plug-in cavity 15 for receiving a second plug-in portion of the socket terminal, and a second plug-in cavity is formed in the second plug-in portion of the socket terminal. The first plug-in cavity 15 includes a first plugin portion 16 which is plugged into the second plug-in cavity of the socket terminal A signal terminal receiving cavity 17 is arranged in the first plug-in portion 16. A signal terminal holder 18 configured to receive a signal terminal is arranged in the signal terminal receiving cavity 17. The signal terminal receiving cavity 17 is adjacent to the second receiving cavity 12. The front cover 7 is arranged on a port of the first plug-in portion 16 and covers a port of the second receiving cavity 12 and a port of the signal terminal receiving cavity 17. The first plug-in portion 16 includes a second sealing groove 161. One end of the second sealing ring 8 is plugged into the second sealing groove 161, and the other end of the second sealing ring 8 abuts against a side wall of the front cover 7, so as to fix the second sealing ring 8. When the first plug-in portion 16 is plugged into the second plug-in cavity of the socket terminal, the second sealing ring 8 is clamped between the second plug-in cavity and the first plug-in portion 16 to achieve sealing connection between the two. Specifically, a pair of first fastening arms 71 are provided at opposite sides of the front cover 7. The first plug-in portion 16 includes a pair of fastening grooves 162 to match the pair of first fastening arms 71. The front cover 7 includes a signal terminal hole 72 corresponding to the signal terminal receiving cavity 17 and two opposite cantilever arms 73 extending from the signal terminal hole 72 towards the signal terminal receiving cavity 17. The two cantilever arms 73 abut against the signal terminal holder 18 to limit the signal terminal holder 18 in the signal terminal receiving cavity 17. One end of each of the two cantilever arms 73 connected to the front cover 7 includes a reinforcing convex rib 74, so as to enhance a strength of each of the two cantilever arms 73 and prevent same from being easily deformed. In addition, the widths of the two cantilever arms 73 are different, so that an assembler can identify a correct assembly direction of the front cover 7 based on the different widths of the two cantilever arms 73, so as to prevent reverse mounting. Referring to FIGS. 1 to 3, 6 and 14, in an embodiment, the elbow plug connector further includes a rear cover 9 and a third sealing ring 10. The housing 1 has a third plug-in portion 19. The third plug-in portion 19 and the first plug-in portion 16 are at an angle. The first receiving cavity 11 is formed in the third plug-in portion 19. The rear cover 9 covers the first receiving cavity 11, and the third plug-in portion 19 is sleeved outward with a side wall of the rear cover 9. A stayproof notch 91 is formed in the side wall of the rear cover 9, and the third plug-in portion 19 includes a stay-proof boss 191 that matches the stay-proof notch 91, so as to prevent the rear cover 9 from being mounted upside down. The third sealing ring 10 is arranged in the first receiving cavity 11 and includes a wire hole 101 for the cable 21 to pass through, so that the cable 21 can be smoothly assembled into the housing 1, and the first receiving cavity 11 can also be sealed. An assembly method for the above elbow plug connector includes the following steps. 1) a limiting member 4 is installed to a limiting groove 131 from a second receiving cavity 12. 2) a rubber core assembly 2 preinstalled with a third sealing ring 10 and a docking terminal 3 is installed to a mounting area 13 respectively from a first receiving cavity 11 and the second receiving cavity 12, so that a first fixing portion 222 of a wiring terminal 22 and a second fixing portion 313 of the docking terminal 3 at least partially overlap with each other and are clamped between a pair of first limiting convex ribs 121 and the limiting member 4. 3) a locking member 5 is installed to the mounting area 13 from a mounting hole 14, and passed through a first through hole 2221 of the first fixing portion 222 and a second through hole 3131 of the second fixing portion 313 to be screwed with the limit member 4, so that the first fixing portion 222 and the second fixing portion 313 can be fixed together. 4) the mounting hole 14 is cover by a sealing cover 6 preinstalled with a first sealing ring 622 to complete sealing between the mounting area 13 and the mounting hole 14. 5) the third sealing ring 10 is installed into the first receiving cavity 11, and then a port of the first receiving cavity is covered by a rear cover 9 to complete sealing of the first receiving cavity. 6) a second sealing ring 8 is installed to a second sealing groove 161, and then a front cover 7 covers the second receiving cavity 12 and abuts against the second sealing ring 8, so as to complete an assembly of the elbow plug connector. To sum up, in the elbow plug connector provided in the present disclosure, the mounting area 13 is arranged in such way that the first fixing portion 222 of the wiring terminal 22 and the second fixing portion 313 of the docking terminal 3 can extend into the mounting area 13 from two directions of the elbow plug connector and at least partially overlap with each other to achieve electrical communication between the wiring terminal 22 and the docking terminal 3 which are at an angle to each other in the elbow plug connector. A connecting structure and a manufacturing process of the elbow plug connector are simple. The first fixing portion 222 and the second fixing portion 313 can be fixed together through the limiting member 4 and the locking member 5, so as to fix the wiring terminal 22 and the docking terminal 3. The fixing structure and the manufacturing process are simple, so as to reduce the manufacturing cost. The sealing cover 6, the third sealing ring 10 and the second sealing ring 8 are respectively arranged in the mounting hole 14, the first receiving cavity 11 and the first plug-in portion 16, therefore sealing of the elbow plug connector can be achieved by sealing structural members when the elbow plug connector is ready to be used, without complicated glue filling process for sealing. The manufacturing process is simple and costs of materials for manufacturing are low, thereby reducing production costs. It should be understood that those of ordinary skill in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the protection scope of the appended claims of the present disclosure.

Claims

1. An elbow plug connector, comprising:a housing, comprising a first receiving cavity and a second receiving cavity, the first receiving cavity and the second receiving cavity being at an angle, and a mounting area being formed at an intersection of the first receiving cavity and the second receiving cavity;a rubber core assembly, comprising a cable and a wiring terminal arranged in the first receiving cavity, the wiring terminal comprising a wiring portion connected to the cable and a first fixing portion extending into the mounting area;a docking terminal arranged in the second receiving cavity, comprising a contact portion configured to dock with a socket terminal and a second fixing portion extending into the mounting area and at least partially overlapping the first fixing portion; anda fixing assembly arranged in the mounting area, comprising a limiting member and a locking member, the second fixing portion and the first fixing portion being clamped between the limiting member and the locking member.

2. The elbow plug connector according to claim 1, wherein the housing comprises a mounting hole arranged in a direction perpendicular to the first receiving cavity and the second receiving cavity, the mounting hole extends to the mounting area, the mounting hole is covered with a sealing cover, the first fixing portion and the second fixing portion at least partially overlap in an axial direction of the mounting hole, the first fixing portion comprises a first through hole in the axial direction of the mounting hole, the second fixing portion comprises a second through hole in the axial direction of the mounting hole, the first through hole and the second through hole completely overlap in the axial direction of the mounting hole, and one end of the locking member passes through the first through hole and the second through hole and then is connected to the limit member.

3. The elbow plug connector according to claim 2, wherein the locking member comprises a base and a connecting rod protruding inwardly from the base, the connecting rod passes through the first through hole and the second through hole to connect to the limiting member, and the second fixing portion and the first fixing portion are clamped between the base and the limiting member.

4. The elbow plug connector according to claim 2, wherein the sealing cover comprises a cover plate, an annular first connecting portion protruding inwardly from the cover plate, and a plurality of elastic arms protruding inwardly from the first connecting portion, each of the plurality of elastic arms is provided with a buckle at an end of each of the plurality of elastic arms, and the first connecting portion is concave to form a first sealing ring groove; andwherein the mounting hole comprises a first receiving hole and a second receiving hole, communicating with the first receiving hole and the mounting area, a mounting step is formed between the first receiving hole and the second receiving hole, the cover plate is received in the first receiving hole and abuts against the mounting step, a first sealing ring is arranged between the first sealing ring groove and the second receiving hole, a first resisting portion is formed by an end surface of the second receiving hole, and the buckle passes through the second receiving hole to snap into the first resisting portion.

5. The elbow plug connector according to claim 4, wherein the second receiving hole comprises a first hole section close to the first receiving hole and a second hole section close to the mounting area, the second hole section comprises an aperture tapering from the first hole section towards the mounting area, the first resisting portion is formed by an end surface of the second hole section, and the first sealing ring is arranged between the first sealing ring groove and the first hole section.

6. The elbow plug connector according to claim 2, wherein the limiting member is a hexagonal nut, and the locking member is a bolt which passes through the first through hole and the second through hole to screw with the nut.

7. The elbow plug connector according to claim 1, wherein a plurality of first limiting convex ribs are arranged in the second receiving cavity in such way that the docking terminal is clamped between a pair of the plurality of first limiting convex ribs, one end of each of the plurality of first limiting convex ribs extends to the mounting area, and the second fixing portion and the first fixing portion are clamped between the limiting member and the plurality of first limiting convex ribs.

8. The elbow plug connector according to claim 1, wherein a plurality of second limiting convex ribs are arranged in the first receiving cavity in such way that the wiring terminal is clamped between a pair of the plurality of second limiting convex ribs, and the plurality of second limiting convex rib extends to the mounting area and abuts against the second fixing portion.

9. The elbow plug connector according to claim 1, wherein the mounting area comprises a limiting groove configured to install the limiting member, and a shape of the limiting groove matches the limiting member.

10. The elbow plug connector according to claim 9, wherein the docking terminal is a high-current clamp terminal, comprising a first clamping piece, a second clamping piece opposite to the first clamping piece, and a second connecting portion between the first clamping piece and the second clamping piece; the first fixing portion is arranged between the first clamping piece and the second clamping piece; the first clamping piece comprises a first main body portion, a first clamping terminal extends from one end of the first main body portion, and the second fixing portion is arranged at theother end of the first main body portion; the second clamping piece comprises a second main body portion, the second main body portion and the first main body portion are arranged side by side in a direction of plate surfaces of the first main body portion, the second main body portion is connected to the first main body portion by the second connecting portion, a second clamping terminal extends from one end of the second main body portion, and the first clamping terminal and the second clamping terminal form the contact portion.

11. The elbow plug connector according to claim 10, wherein the limiting groove communicates with the second receiving cavity, a second resisting portion is formed on the second main body portion, the second resisting portion is arranged opposite to the limiting groove and abuts against the limiting member, the second resisting portion matches a shape of the limiting member, and the second resisting portion and the limiting groove together limit the limiting member within the mounting area.

12. The elbow plug connector according to claim 1, further comprising a front cover and a second sealing ring, wherein the housing comprises a first plug-in cavity for receiving a second plug-in portion of the socket terminal, the first plug-in cavity comprises a first plug-in portion plugged into a second plug-in cavity of the socket terminal, the front cover is arranged on a port of the first plug-in portion and covers a port of the second receiving cavity, the first plug-in portion comprises a second sealing groove, one end of the second sealing ring is plugged into the second sealing groove, and the other end of the second sealing ring abuts against a side wall of the front cover.

13. The elbow plug connector according to claim 12, further comprising a rear cover, wherein the housing comprises a third plug-in portion which is at an angle with respect to the first plug-in portion, the first receiving cavity is formed in the third plug-in portion, the rear cover covers the first receiving cavity, and the third plug-in portion is sleeved outwardly with a side wall of the rear cover.

14. The elbow plug connector according to claim 1, further comprising a third sealing ring arranged in the first receiving cavity and comprising a wire hole for the cable to pass through.

15. An assembly method of the elbow plug connector according to any one of claims 1 to 14, comprising:installing a limiting member to a limiting groove from a second receiving cavity;installing a rubber core assembly preinstalled a third sealing ring and a docking terminal to a mounting area respectively from a first receiving cavity and the second receiving cavity, so that a first fixing portion of a wiring terminal and a second fixing portion of the docking terminal at least partially overlap with each other and are clamped between a pair of first limiting convex ribs and the limiting member;installing a locking member to the mounting area from a mounting hole, and passing the lockingmember through a first through hole of the first fixing portion and a second through hole of the second fixing portion to screw with the limiting member;installing the mounting hole with a sealing cover preinstalled with a first sealing ring to complete sealing between the mounting area and the mounting hole;5 installing the third sealing ring into the first receiving cavity, and covering a port of the first receiving cavity with a rear cover; andinstalling a second sealing ring to a second sealing groove, and covering a front cover over the second receiving cavity to abut against the second sealing ring.CLAIMS1. An elbow plug connector, comprising:a housing, comprising a first receiving cavity and a second receiving cavity, the first receiving cavity and the second receiving cavity being at an angle, and a mounting area being formed at an intersection of the first receiving cavity and the second receiving cavity;a rubber core assembly, comprising a cable and a wiring terminal arranged in the first receiving cavity, the wiring terminal comprising a wiring portion connected to the cable and a first fixing portion extending into the mounting area;a docking terminal arranged in the second receiving cavity, comprising a contact portion configured to dock with a socket terminal and a second fixing portion extending into the mounting area and at least partially overlapping the first fixing portion, wherein the docking terminal is a high-current clamp terminal, comprising a first clamping piece, a second clamping piece opposite to the first clamping piece, and a first connecting portion between the first clamping piece and the second clamping piece; the first fixing portion is arranged between the first clamping piece and the second clamping piece; the first clamping piece comprises a first main body portion, a first clamping terminal extends from one end of the first main body portion, and the second fixing portion is arranged at the other end of the first main body portion; the second clamping piece comprises a second main body portion, the second main body portion and the first main body portion are arranged side by side in a direction of plate surfaces of the first main body portion, the second main body portion is connected to the first main body portion by the first connecting portion, a second clamping terminal extends from one end of the second main body portion, and the first clamping terminal and the second clamping terminal form the contact portion; anda fixing assembly arranged in the mounting area, comprising a limiting member and a locking member, the second fixing portion and the first fixing portion being clamped between the limiting member and the locking member;wherein the mounting area comprises a limiting groove configured to install the limiting member, and a shape of the limiting groove matches the limiting member, the limiting groove communicates with the second receiving cavity, a first resisting portion is formed on the second main body portion, the first resisting portion is arranged opposite to the limiting groove and abuts against the limiting member, the first resisting portion matches a shape of the limiting member and limits the limiting member within the mounting area together with the limiting groove.

2. The elbow plug connector according to claim 1, wherein the housing comprises a mounting28 02 25hole arranged in a direction perpendicular to the first receiving cavity and the second receiving cavity, the mounting hole extends to the mounting area, the mounting hole is covered with a sealing cover, the first fixing portion and the second fixing portion at least partially overlap in an axial direction of the mounting hole, the first fixing portion comprises a first through hole in the axial direction of the 5 mounting hole, the second fixing portion comprises a second through hole in the axial direction of the mounting hole, the first through hole and the second through hole completely overlap in the axial direction of the mounting hole, and one end of the locking member passes through the first through hole and the second through hole and then is connected to the limit member.

3. The elbow plug connector according to claim 2, wherein the locking member comprises a 10 base and a connecting rod protruding inwardly from the base, the connecting rod passes through the first through hole and the second through hole to connect to the limiting member, and the second fixing portion and the first fixing portion are clamped between the base and the limiting member.

4. The elbow plug connector according to claim 2, wherein the sealing cover comprises a cover plate, an annular second connecting portion protruding inwardly from the cover plate, and a plurality of elastic arms protruding inwardly from the second connecting portion, each of the plurality of elastic arms is provided with a buckle at an end of each of the plurality of elastic arms, and the second connecting portion is concave to form a first sealing ring groove; andwherein the mounting hole comprises a first receiving hole and a second receiving hole, communicating with the first receiving hole and the mounting area, a mounting step is formed20 between the first receiving hole and the second receiving hole, the cover plate is received in the first receiving hole and abuts against the mounting step, a first sealing ring is arranged between the first sealing ring groove and the second receiving hole, a second resisting portion is formed by an end surface of the second receiving hole, and the buckle passes through the second receiving hole to snap into the second resisting portion.25 5. The elbow plug connector according to claim 4, wherein the second receiving hole comprisesa first hole section close to the first receiving hole and a second hole section close to the mounting area, the second hole section comprises an aperture tapering from the first hole section towards the mounting area, the second resisting portion is formed by an end surface of the second hole section, and the first sealing ring is arranged between the first sealing ring groove and the first hole section.30 6. The elbow plug connector according to claim 2, wherein the limiting member is a hexagonalnut, and the locking member is a bolt which passes through the first through hole and the second through hole to screw with the nut.28 02 257. The elbow plug connector according to claim 1, wherein a plurality of first limiting convex ribs are arranged in the second receiving cavity in such way that the docking terminal is clamped between a pair of the plurality of first limiting convex ribs, one end of each of the plurality of first limiting convex ribs extends to the mounting area, and the second fixing portion and the first fixing 5 portion are clamped between the limiting member and the plurality of first limiting convex ribs.

8. The elbow plug connector according to claim 1, wherein a plurality of second limiting convex ribs are arranged in the first receiving cavity in such way that the wiring terminal is clamped between a pair of the plurality of second limiting convex ribs, and the plurality of second limiting convex rib extends to the mounting area and abuts against the second fixing portion.10 9. The elbow plug connector according to claim 1, further comprising a front cover and a secondsealing ring, wherein the housing comprises a first plug-in cavity for receiving a second plug-in portion of the socket terminal, the first plug-in cavity comprises a first plug-in portion plugged into a second plug-in cavity of the socket terminal, the front cover is arranged on a port of the first plug-in portion and covers a port of the second receiving cavity, the first plug-in portion comprises a second sealing groove, one end of the second sealing ring is plugged into the second sealing groove, and the other end of the second sealing ring abuts against a side wall of the front cover.

10. The elbow plug connector according to claim 9, further comprising a rear cover, wherein the housing comprises a third plug-in portion which is at an angle with respect to the first plug-in portion, the first receiving cavity is formed in the third plug-in portion, the rear cover covers the first receiving20 cavity, and the third plug-in portion is sleeved outwardly with a side wall of the rear cover.

11. The elbow plug connector according to claim 1, further comprising a third sealing ring arranged in the first receiving cavity and comprising a wire hole for the cable to pass through.

12. An assembly method of the elbow plug connector according to any one of claims 1 to 11, comprising:25 installing a limiting member to a limiting groove from a second receiving cavity;installing a rubber core assembly preinstalled a third sealing ring and a docking terminal to a mounting area respectively from a first receiving cavity and the second receiving cavity, so that a first fixing portion of a wiring terminal and a second fixing portion of the docking terminal at least partially overlap with each other and are clamped between a pair of first limiting convex ribs and the limiting 30 member;installing a locking member to the mounting area from a mounting hole, and passing the locking member through a first through hole of the first fixing portion and a second through hole of the secondfixing portion to screw with the limiting member;installing the mounting hole with a sealing cover preinstalled with a first sealing ring to complete sealing between the mounting area and the mounting hole;installing the third sealing ring into the first receiving cavity, and covering a port of the first5 receiving cavity with a rear cover; andinstalling a second sealing ring to a second sealing groove, and covering a front cover over the second receiving cavity to abut against the second sealing ring.28 02 25

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