A through-cylinder connector with integrated large and small currents

Abstract

The present invention relates to the technical field of electrical connectors, and in particular to a through-cylinder connector for integrating large and small currents, comprising an intermediate base, an outer plug and an inner plug. The intermediate base is internally divided into an outer mounting cavity and an inner mounting cavity, and is fixed with two large male terminals and a plurality of small male terminals. The ends of the large male terminal and the small male terminal extend into the outer mounting cavity and the inner mounting cavity respectively, the outer plug is inserted into the outer mounting cavity, the inner plug is inserted into the inner mounting cavity, and the small male terminals are arranged in a line. The connector realizes the merging of a high-current module and a signal module. By using a three-stage design, it is convenient to disassemble and replace components. At the same time, terminal secondary locks are provided. While ensuring pre-assembly and supply by components, the assembly operation is simple and quick when using the manufacturer's assembly. A simple press can achieve secondary locking of the terminal. By providing a plug secondary lock and a handle structure, misoperation is prevented. The connector is suitable for working environments with strong vibrations, and the stability and reliability of the electrical connection are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric connectors, in particular to a through-cylinder connector integrating large and small currents. Background Art

[0002] Due to structural limitations, common electrical connectors usually have high-current modules and signal modules installed separately, resulting in large installation space, numerous assembly steps, and high cost of use. When manufacturers supply electrical connectors to users, female terminals are sometimes not required to be plugged in. The female terminals are inserted after the manufacturer assembles and connects the wires. The secondary lock structure of the terminals in common electrical connectors is relatively simple and cannot form a pre-installed structure. The secondary lock of the terminals and the electrical connector body need to be shipped separately, which is more troublesome for manufacturers to assemble and use. Alternatively, the secondary lock of the terminals and the electrical connector body must be assembled and then disassembled, which can easily cause damage to parts and affect assembly operations. To facilitate component replacement, electrical connectors can be designed as detachable split structures, but common snap-on connection structures may result in incorrect plugging and unplugging, or even plugging and unplugging while powered, causing significant damage to electrical components. In situations with strong vibrations, the components of the electrical connector may become loose or deformed, leading to unstable electrical connections. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings of the existing problems, the present invention provides a through-cylinder connector with integrated large and small currents.

[0004] The technical solution adopted by the present invention to solve its technical problems is: an integrated large and small current through-cylinder connector, including an intermediate base, an external plug and an internal plug, the intermediate base is divided into an external mounting cavity and an internal mounting cavity, and two large male terminals and a plurality of small male terminals are fixed, the two ends of the large male terminal and the small male terminal respectively extend into the external mounting cavity and the internal mounting cavity, the external plug is inserted into the external mounting cavity, the internal plug is inserted into the internal mounting cavity, the small male terminals are arranged in a line, and the flat surface direction of the large male terminal is perpendicular to the in-line arrangement direction of the small male terminals.

[0005] According to another embodiment of the present invention, further comprising: a glue filling area being provided at the bottom of one of the outer mounting cavity and the inner mounting cavity; and a blocking plate being provided at the bottom of the other cavity, wherein the blocking plate is located between the two large male terminals and between the large male terminal and the small male terminal.

[0006] According to another embodiment of the present invention, the outer plug and the inner plug are both provided with terminal shells for inserting female terminals, namely, an inner terminal shell and an outer terminal shell, and the terminal shells are both provided with a large terminal cavity and a small terminal cavity, the large terminal cavity is inserted with a large female terminal, and the small terminal cavity is inserted with a small female terminal;

[0007] The outer plug and the inner plug are also provided with a terminal secondary lock. The installation position of the terminal secondary lock has two switchable states, including a pre-installed position and a locked position. When the terminal secondary lock is in the pre-installed position, it is connected to the terminal shell as a whole, but the female terminal can be plugged in and out of the large terminal cavity and the small terminal cavity. When the terminal secondary lock is in the locked position, it is connected to the terminal shell as a whole, and the female terminal cannot be pulled out from the terminal shell.

[0008] According to another embodiment of the present invention, further comprising: a second partition groove is provided between the outer walls of the large terminal cavity and the small terminal cavity; a first positioning surface is formed on the bottom of the second partition groove; a large end locking opening communicating with the large terminal cavity is provided on the outer walls opposite to the second partition groove; and a small end locking opening communicating with the small terminal cavity is provided on the bottom of the second partition groove;

[0009] The terminal secondary lock is a frame-shaped structure and is provided with side beams, a front beam and a rear beam. A large end lock tongue is protruding from the inner side surface of the rear beam. At least one snap-fit ​​boss is provided on the outer wall of the large terminal cavity or the small terminal cavity. The terminal secondary lock is sleeved on the outer walls of the two large terminal cavities and is locked between the snap-fit ​​boss and the first positioning surface.

[0010] The terminal secondary lock is restricted to the pre-installed position or the locked position by a snap-fit ​​structure matching the terminal housing;

[0011] When the secondary lock of the terminal is in the locked position, the large-end lock tongue extends into the large-end lock mouth, and its upper end face abuts against the shoulder surface of the large terminal head of the large female terminal; the front beam extends into the small-end lock mouth, and its upper end face abuts against the shoulder surface of the small terminal head of the small female terminal.

[0012] According to another embodiment of the present invention, it further includes that a first partition groove connected to the second partition groove is provided between the outer walls of the large terminal cavity, and a middle beam is connected to the middle of the front beam and the rear beam. The middle beam is located in the first partition groove, and pre-installed positioning grooves and locking positioning grooves are provided on both sides of the middle beam, and an elastic groove is provided through the middle of the middle beam. Positioning bosses protruding into the first partition groove are provided on the adjacent outer walls of the two large terminal cavities, and the positioning bosses are clamped in the pre-installed positioning groove or the locking positioning groove.

[0013] According to another embodiment of the present invention, it further includes that a first partition groove connected to the second partition groove is provided between the outer walls of the large terminal cavity, a middle beam is connected to the middle of the front beam and the rear beam, the middle beam is located in the first partition groove, and at least one of its two side surfaces is provided with a pre-installed positioning groove and a locking positioning groove, and a positioning boss is provided on the adjacent outer wall of the corresponding large terminal cavity, and the positioning boss is clamped in the pre-installed positioning groove or the locking positioning groove.

[0014] According to another embodiment of the present invention, the outer plug is further provided with an outer base for mounting the outer terminal housing and connecting to the intermediate base;

[0015] The outer base is provided with an upper mounting cavity for inserting the outer terminal shell, and a plurality of first ribs are protruding from the inner wall of the upper mounting cavity. The outer terminal shell is correspondingly provided with a first groove. The first ribs are inserted into the first groove, and the lower ends thereof abut against the bottom of the first groove.

[0016] A sealing boss is provided on the periphery of the middle portion of the outer terminal housing, the lower end surface of the sealing boss is a first positioning surface, and an outer sealing ring is sleeved on the upper end surface of the sealing boss;

[0017] The outer base is further provided with a lower mounting cavity for inserting the side wall of the outer mounting cavity, the inner wall of the lower mounting cavity is provided with a plurality of second grooves, the outer wall of the outer mounting cavity is correspondingly provided with a plurality of third ribs, the third ribs are clamped in the second grooves, and the inner wall of the outer mounting cavity abuts against the outer side surface of the outer sealing ring;

[0018] A plurality of second ribs are provided on the inner wall of the outer mounting cavity, and a plurality of positioning blocks are provided on the outer wall of the small terminal cavity of the outer terminal housing opposite to the second partition groove, wherein the positioning blocks are inserted between the second ribs;

[0019] A corresponding position of the lower mounting cavity is provided with an avoidance hole for pushing the secondary lock of the terminal.

[0020] According to another embodiment of the present invention, further comprising: a handle for secondary safety locking of the intermediate base and the external plug is provided on the outer base, and a locking shaft is correspondingly provided on the intermediate base.

[0021] According to another embodiment of the present invention, the inner plug is further provided with an inner terminal shell for inserting the female terminal, a plug lock cavity is provided on one side of the inner terminal shell, locking bosses are provided on both sides of the interior of the plug lock cavity, and two cantilever plates of a cantilevered structure are provided on the outside of the plug lock cavity, the upper ends of the cantilever plates are connected to the inner terminal shell body, and the lower ends thereof are connected and fixed with a second handle, and a plug lock buckle is also connected between the cantilever plates;

[0022] A plug secondary lock is inserted into the plug lock cavity, and the plug secondary lock is provided with a frame-shaped base, with upper and lower positioning grooves on both sides of the base, and a fourth boss and a first handle for withdrawing the plug secondary lock at the bottom. The base is located in the plug lock cavity, and the locking boss is clamped in the upper or lower positioning groove.

[0023] A plug lock tongue is provided on the corresponding inner wall of the inner mounting cavity, and a guide inclined surface is provided on the lower end surface of the plug lock tongue. When the locking boss is located in the lower positioning groove, the lower end surface of the plug lock buckle abuts against the upper end surface of the plug lock tongue, and the outer surface of the fourth boss of the plug secondary lock abuts against the inner surface of the second handle.

[0024] According to another embodiment of the present invention, it further includes that the fourth boss is provided with an anti-error bevel block, the outer side of the anti-error bevel block is provided with an anti-error boss, the lower end face of the anti-error boss is a transition bevel, and the upper end face is a plane, when the locking boss is clamped in the upper positioning groove, the upper end face of the anti-error boss abuts the lower end face of the plug lock, and when the locking boss is clamped in the lower positioning groove, the transition bevel of the anti-error boss abuts the upper end face of the plug lock.

[0025] The beneficial effect of the present invention is that the electrical connector realizes the purpose of integrating large current and small current / signal into a single electrical connector, which is helpful to realize the merger of large current module and signal module. By using a three-stage design, it is convenient to disassemble and replace the components. At the same time, the terminal is provided with a secondary lock. While ensuring pre-assembly and supply according to components, the assembly operation is simple and fast when using the manufacturer's assembly. The terminal can be locked twice with a simple press. By setting the secondary lock of the plug, misoperation is prevented and the locking is firm. By setting the handle structure, the connection between the external plug and the middle base is facilitated to prevent misoperation and the locking is firm. The internal structure is compact and the components are stably matched. It is suitable for working environments with strong vibrations, which greatly improves the stability and reliability of the electrical connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below with reference to the accompanying drawings and examples.

[0027] Figure 1 It is a schematic diagram of the decomposition structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the exploded structure of the middle base;

[0029] Figure 3 This is a schematic diagram of the exploded structure of the external plug;

[0030] Figure 4 It is a schematic diagram of the exploded structure of the inner plug;

[0031] Figure 5 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention;

[0032] Figure 6 yes Figure 5 Enlarged view of Y in the middle;

[0033] Figure 7 A schematic diagram of the top structure of the present invention;

[0034] Figure 8 yes Figure 7 Cross-sectional view at point AA (along the direction of the large male terminal);

[0035] Figure 9 yes Figure 8 Cross-sectional view at the middle DD (along the secondary locking direction of the terminal);

[0036] Figure 10 yes Figure 9 Enlarged image at the middle X;

[0037] Figure 11 yes Figure 8 Cross-sectional view at EE;

[0038] Figure 12 yes Figure 7 Cross-sectional view of the middle BB (along the direction of the small male terminal);

[0039] Figure 13 yes Figure 7 Cross-sectional view at CC;

[0040] Figure 14 yes Figure 13 Enlarged view of the middle Z;

[0041] Figure 15 It is a top view of the middle base;

[0042] Figure 16 This is a bottom view of the middle base;

[0043] Figure 17 It is a three-dimensional cross-sectional view of the middle base;

[0044] Figure 18 This is a schematic diagram of the small male terminal;

[0045] Figure 19 This is a schematic diagram of the large male terminal;

[0046] Figure 20 It is a structural diagram of the inner plug;

[0047] Figure 21 This is a schematic diagram of the structure of the inner plug in the other direction;

[0048] Figure 22 is a perspective cutaway view of the inner plug;

[0049] Figure 23 This is a left side view of the inner plug;

[0050] Figure 24 is a bottom view of the inner plug;

[0051] Figure 25 yes Figure 24 Cross-sectional view at FF in the middle;

[0052] Figure 26 This is a schematic diagram of the terminal secondary lock;

[0053] Figure 27 is a schematic diagram of the inner terminal housing;

[0054] Figure 28 This is a schematic diagram of the plug secondary lock;

[0055] Figure 29 is a perspective cutaway view of the outer plug;

[0056] Figure 30 is a schematic diagram of the outer terminal housing.

[0057] In the figure, there are the middle base 1, the outer plug 2, the inner plug 3, the terminal secondary lock 4, the small female terminal 5, the large female terminal 6, and the terminal shell 7.

[0058] Mounting flange 11, mounting hole 111, small male terminal 12, second through-hole 121, second anti-dropping block 122, large male terminal 13, first through-hole 131, first anti-dropping block 132, outer mounting cavity 14, second rib 141, third rib 142, inner mounting cavity 15, plug lock tongue 151, window 152, lock shaft 16, glue filling area 17, blocking plate 18, inner sealing ring 19,

[0059] Outer base 22, upper mounting cavity 221, first rib 2211, lower mounting cavity 222, second groove 2221, avoidance hole 2222, handle 23, outer sealing ring 24,

[0060] Plug secondary lock 32, base 321, positioning groove 322, lower positioning groove 323, fourth boss 324, first handle 325, anti-error inclined block 326, anti-error boss 327,

[0061] Side beam 41, front beam 42, middle beam 43, pre-installed positioning groove 431, locking positioning groove 432, rear beam 44, large end locking tongue 441, elastic groove 45, locking boss 46,

[0062] Small terminal head 51, large terminal head 61,

[0063] Large terminal cavity 701, positioning boss 7011, large end lock 7012, small terminal cavity 702, small end lock 7022, first partition groove 703, second partition groove 704, first positioning surface 705, buckle boss 706,

[0064] Inner terminal housing 71, plug lock cavity 711, locking boss 7111, cantilever plate 712, second handle 7121, plug lock buckle 7122,

[0065] Outer terminal housing 72 , sealing boss 721 , positioning block 722 , first groove 723 . DETAILED DESCRIPTION

[0066] like Figure 1-30 This is a structural diagram of the present invention, an integrated large and small current through-cylinder connector, including an intermediate base 1, an outer plug 2 and an inner plug 3. The intermediate base 1 is internally separated into an outer mounting cavity 14 and an inner mounting cavity 15, and is fixed with two large male terminals 13 and a plurality of small male terminals 12. The ends of the large male terminals 13 and the small male terminals 12 extend into the outer mounting cavity 14 and the inner mounting cavity 15 respectively. The outer plug 2 is inserted into the outer mounting cavity 14, and the inner plug 3 is inserted into the inner mounting cavity 15. The small male terminals 12 are arranged in a line, and the flat surface direction of the large male terminal 13 is perpendicular to the in-line arrangement direction of the small male terminals 12. Figure 15 .

[0067] By arranging the large male terminal 13 and the small male terminal 12 at 90 degrees, the electrical clearance is better met to prevent circuit breakdown.

[0068] Preferably, a glue filling area 17 is provided at the bottom of one of the outer mounting cavity 14 and the inner mounting cavity 15, and a blocking plate 18 is provided at the bottom of the other cavity. The blocking plate 18 is located between the two large male terminals 13 and between the large male terminal 13 and the small male terminal 12. The glue filling area 17 is used to fill glue to achieve a sealing effect. By providing the blocking plate 18, circuit breakdown is prevented. Figure 17 .

[0069] The blocking plate 18 may be T-shaped.

[0070] Preferably, the outer plug 2 and the inner plug 3 are both provided with a terminal shell 7 for inserting female terminals, namely an inner terminal shell 71 and an outer terminal shell 72, and the terminal shell 7 is provided with a large terminal cavity 701 and a small terminal cavity 702. The large terminal cavity 701 is inserted with a large female terminal 6, and the small terminal cavity 702 is inserted with a small female terminal 5;

[0071] The outer plug 2 and the inner plug 3 are also provided with a terminal secondary lock 4. The installation position of the terminal secondary lock 4 has two switchable states, including a pre-installed position and a locked position. When the terminal secondary lock 4 is in the pre-installed position, it is connected to the terminal shell 7 as a whole, but the female terminal can be plugged in and out of the large terminal cavity 701 and the small terminal cavity 702. When the terminal secondary lock 4 is in the locked position, it is connected to the terminal shell 7 as a whole, and the female terminal cannot be pulled out from the terminal shell 7.

[0072] Preferably, a second partition groove 704 is provided between the outer walls of the large terminal cavity 701 and the small terminal cavity 702, and a first positioning surface 705 is formed on the bottom of the second partition groove 704. A large end lock opening 7012 communicating with the large terminal cavity 701 is provided on the outer walls opposite to the second partition groove 704, and a small end lock opening 7022 communicating with the small terminal cavity 702 is provided on the bottom of the second partition groove 704; Figure 22 , the small end locking opening 7022 can be a through groove.

[0073] The terminal secondary lock 4 is a frame-shaped structure, and is provided with a side beam 41, a front beam 42 and a rear beam 44. A large end lock tongue 441 is protruding from the inner side surface of the rear beam 44. At least one snap-fit ​​boss 706 is provided on the outer wall of the large terminal cavity 701 or the small terminal cavity 702. The terminal secondary lock 4 is sleeved on the outer walls of the two large terminal cavities 701 and is locked between the snap-fit ​​boss 706 and the first positioning surface 705; Figure 26 There are two large-end locking tongues 441, and the snap-on bosses 706 can be set one on each outer wall of the large terminal cavity 701 opposite to the first partition groove 703, and two on the outer wall of the small terminal cavity 702 adjacent to the second partition groove 704. The upper end surface of the snap-on boss 706 is set as a transition inclined surface, and the lower end surface is a step plane.

[0074] The terminal secondary lock 4 is restricted in the pre-installed position or the locked position by a snap-fit ​​structure matching the terminal housing 7;

[0075] When the terminal secondary lock 4 is in the locked position, the large end lock tongue 441 extends into the large end lock opening 7012, and its upper end surface abuts the shoulder surface of the large terminal head 61 of the large female terminal 6, and the front beam 42 extends into the small end lock opening 7022, and its upper end surface abuts the shoulder surface of the small terminal head 51 of the small female terminal 5.

[0076] Preferably, a first partition groove 703 communicating with the second partition groove 704 is provided between the outer walls of the large terminal cavity 701, and a middle beam 43 is connected to the middle of the front beam 42 and the rear beam 44. The middle beam 43 is located in the first partition groove 703, and pre-installed positioning grooves 431 and locking positioning grooves 432 are provided on both sides thereof, and an elastic groove 45 is provided through the middle thereof. Positioning bosses 7011 protruding into the first partition groove 703 are provided on the adjacent outer walls of the two large terminal cavities 701, and the positioning bosses 7011 are clamped in the pre-installed positioning grooves 431 or the locking positioning grooves 432. Figure 25 The elastic groove 45 is provided to improve the elasticity of a local position of the middle beam 43 so as to generate elastic deformation when it abuts against the positioning boss 7011 or the snap boss 706 so as to be assembled into place.

[0077] Preferably, a first partition groove 703 communicating with the second partition groove 704 is provided between the outer walls of the large terminal cavity 701, and a middle beam 43 is connected to the middle of the front beam 42 and the rear beam 44. The middle beam 43 is located in the first partition groove 703, and at least one of its two side surfaces is provided with a pre-installed positioning groove 431 and a locking positioning groove 432, and a positioning boss 7011 is provided on the adjacent outer wall of the corresponding large terminal cavity 701, and the positioning boss 7011 is clamped in the pre-installed positioning groove 431 or the locking positioning groove 432. Figure 25 .

[0078] Preferably, the outer plug 2 is further provided with an outer base 22 for mounting the outer terminal housing 72 and connecting to the intermediate base 1;

[0079] The outer base 22 is provided with an upper mounting cavity 221 for inserting the outer terminal shell 72. A plurality of first ribs 2211 are protruding from the inner wall of the upper mounting cavity 221. The outer terminal shell 72 is provided with a corresponding first groove 723. The first rib 2211 is inserted into the first groove 723, and its lower end abuts against the bottom of the first groove 723. Figure 29 .

[0080] A sealing boss 721 is provided on the periphery of the middle portion of the outer terminal housing 72. The lower end surface of the sealing boss 721 is the first positioning surface 705. The upper end surface of the sealing boss 721 is sleeved with an outer sealing ring 24.

[0081] like Figure 9 The outer base 22 is further provided with a lower mounting cavity 222 for inserting the side wall of the outer mounting cavity 14. The inner wall of the lower mounting cavity 222 is provided with a plurality of second grooves 2221. The outer wall of the outer mounting cavity 14 is correspondingly provided with a plurality of third ribs 142. The third ribs 142 are clamped in the second grooves 2221. The inner wall of the outer mounting cavity 14 abuts against the outer side surface of the outer sealing ring 24. Figure 29 .

[0082] like Figure 9 , a plurality of second ribs 141 are provided on the inner wall of the outer mounting cavity 14, and a plurality of positioning blocks 722 are provided on the outer wall of the small terminal cavity 702 of the outer terminal housing 72 opposite to the second partition groove 704, and the positioning blocks 722 are inserted between the second ribs 141;

[0083] like Figure 29 A corresponding position of the lower mounting cavity 222 is provided with an avoidance hole 2222 for pushing the terminal secondary lock 4 .

[0084] Preferably, the outer base 22 is provided with a handle 23 for secondary safety locking of the intermediate base 1 and the outer plug 2, and the intermediate base 1 is correspondingly provided with a lock shaft 16. Figure 1 、 Figure 2 .

[0085] Preferably, the inner plug 3 is provided with an inner terminal shell 71 for inserting the female terminal, a plug lock cavity 711 is provided on one side of the inner terminal shell 71, locking bosses 7111 are provided on both sides of the inner portion of the plug lock cavity 711, and two cantilever plates 712 of a cantilevered structure are provided on the outer side of the plug lock cavity 711, the upper ends of the cantilever plates 712 are connected to the body of the inner terminal shell 71, and the lower ends thereof are connected and fixed with a second handle 7121, and a plug lock buckle 7122 is also connected between the cantilever plates 712; Figure 23 ;

[0086] The plug lock cavity 711 is inserted with the plug secondary lock 32, and the plug secondary lock 32 is provided with a frame-shaped base 321, and the upper positioning groove 322 and the lower positioning groove 323 are provided on both sides of the base 321. The bottom thereof is provided with a fourth boss 324 and a first handle 325 for withdrawing the plug secondary lock 32. The base 321 is located in the plug lock cavity 711, and the locking boss 7111 is clamped in the upper positioning groove 322 or the lower positioning groove 323; Figure 25 .

[0087] The corresponding inner wall of the inner mounting cavity 15 is provided with a plug lock tongue 151, and the lower end surface of the plug lock tongue 151 is provided with a guiding inclined surface. When the locking boss 7111 is located in the lower positioning groove 323, the lower end surface of the plug lock buckle 7122 abuts against the upper end surface of the plug lock tongue 151, and the outer surface of the fourth boss 324 of the plug secondary lock 32 abuts against the inner surface of the second handle 7121. Figure 14 .

[0088] A through window 152 may be provided above the plug lock tongue 151, through which the position of the plug lock buckle 7122 may be viewed. Figure 14 .

[0089] Preferably, the fourth boss 324 is provided with an anti-error bevel block 326, and the outer side of the anti-error bevel block 326 is provided with an anti-error boss 327. The lower end surface of the anti-error boss 327 is a transition bevel surface, and the upper end surface thereof is a plane. When the locking boss 7111 is clamped in the upper positioning groove 322, the upper end surface of the anti-error boss 327 abuts against the lower end surface of the plug lock buckle 7122. When the locking boss 7111 is clamped in the lower positioning groove 323, the transition bevel surface of the anti-error boss 327 abuts against the upper end surface of the plug lock buckle 7122. Figure 28 .

[0090] Preferably, a locking boss 46 is provided on the top surface of the rear beam 44. It is convenient to use a tool to push the terminal secondary lock 4 from the locking position to the pre-installed position. Figure 26 .

[0091] Preferably, like the center beam 43 , the side beams 41 and the front beam 42 are provided with elastic grooves 45 for improving the elasticity of local positions of the side beams 41 , the front beam 42 and the center beam 43 , and leaving the boss structure aside during installation.

[0092] Preferably, the middle of the large male terminal 13 is provided with a first through-hole 131, and the middle of the small male terminal 12 is provided with a second through-hole 121. The middle cavity is provided, and after integral injection molding, the connection strength between the male terminal and the middle base 1 is better. Figure 18 and Figure 19 .

[0093] Preferably, the middle of both sides of the large male terminal 13 is provided with a first anti-slip block 132, and the middle of both sides of the small male terminal 12 is provided with a second anti-slip block 122. The connection strength between the male terminal and the middle base 1 is enhanced, and it can also be applied to products pressed into plastic parts. Figure 18 and Figure 19 .

[0094] Preferably, an inner sealing ring 19 is provided below the mounting flange 11 of the intermediate base 1. Figure 17 .

[0095] Preferably, a mounting flange 11 is provided on the periphery of the middle portion of the intermediate base 1, and a mounting hole 111 is provided on the mounting flange 11. Suitable for through-cylinder type electrical connectors, which are installed by a single bolt. Figure 17 .

[0096] Specifically, two 2x5.8mm large male terminals 13 and 4x1.0mm small male terminals 12 can be selected, for a total of 6 pins, which can meet the current performance requirements of 2x50A and 4x10A. In addition, two or three of the small male terminals 12 can be selected according to specific usage requirements.

[0097] The large male terminal 13 and the small male terminal 12 are both integrally stamped and formed to reduce production costs, and are silver-plated on the surface to improve conductivity.

[0098] When the manufacturer assembles the terminal secondary lock 4, the terminal secondary lock 4 is placed on the outer wall of the two large terminal cavities 701, the middle beam 43 is located in the first partition groove 703, the front beam 42 is located in the second partition groove 704, and the terminal secondary lock 4 moves downward to contact the first positioning surface 705. The terminal secondary lock 4 is clamped in the up and down directions by the snap-on boss 706. At the same time, the positioning boss 7011 is located in the pre-installed positioning groove 431, and the installation of the terminal secondary lock 4 is completed. In this state, the manufacturer can ship the terminal to the user. After the user inserts the female terminal into the large terminal cavity 701 and the small terminal cavity 702, he presses and pushes the rear beam 44, and the front beam 42 extends into the small end lock 7022 to lock the small female terminal 5. The large end lock tongue 441 extends into the large end lock 7012 to lock the large female terminal 6. At the same time, the positioning boss 7011 moves to the locking positioning groove 432 to prevent the terminal secondary lock 4 from loosening.

[0099] When the bolt 711 is in the unlocked position, the locking cam 7111 will be in the unlocked position, and the locking cam 7111 will be in the unlocked position when the bolt 711 is in the unlocked position, so that the bolt 7111 can be unlocked and the locking cam 7111 can be unlocked. If the inner terminal shell 71 is not inserted into place during assembly, the plug lock tongue 151 cannot be pushed further, which also plays a role in detecting whether the inner terminal shell 71 is inserted into place. Of course, the plug lock buckle 7122 can also be checked through the window 152 to see whether it is in place.

[0100] The handle 23 is a common safety locking structure of a plug-in electrical connector, which prevents the outer plug 2 from being accidentally pulled out of the middle base 1 .

[0101] The various connection structures of this invention also use conventional snap-fit ​​connection structures, including the connection between the small female terminal 5, the large female terminal 6 and the small terminal cavity 702, the large terminal cavity 701, the connection between the inner plug 3 and the intermediate base 1, the connection between the outer plug 2 and the outer base 22, and the connection between the outer base 22 and the intermediate base 1. Common snap-fit ​​connection structures are beveled bosses and matching grooves.

[0102] The above description is only illustrative of the present invention and not restrictive. Those skilled in the art will understand that many modifications, changes or equivalents may be made without departing from the spirit and scope defined by the appended claims, but all of them will fall within the scope of protection of the present invention.

Claims

1. A through-cylinder connector with integrated large and small currents, characterized in that: The intermediate base (1) comprises an outer mounting cavity (14) and an inner mounting cavity (15), wherein the inner portion of the intermediate base (1) is divided into an outer mounting cavity (14) and an inner mounting cavity (15), and two large male terminals (13) and a plurality of small male terminals (12) are fixed thereto, and the two ends of the large male terminals (13) and the small male terminals (12) extend into the outer mounting cavity (14) and the inner mounting cavity (15) respectively, the outer plug (2) is inserted into the outer mounting cavity (14), and the inner plug (3) is inserted into the inner mounting cavity (15), and the small male terminals (12) are arranged in a line, and the flat surface direction of the large male terminal (13) is perpendicular to the in-line arrangement direction of the small male terminals (12); The outer plug (2) and the inner plug (3) are both provided with a terminal shell (7) for inserting a female terminal, namely an inner terminal shell (71) and an outer terminal shell (72), and the terminal shell (7) is provided with a large terminal cavity (701) and a small terminal cavity (702), the large terminal cavity (701) is inserted with a large female terminal (6), and the small terminal cavity (702) is inserted with a small female terminal (5); The outer plug (2) and the inner plug (3) are both provided with a terminal secondary lock (4). The installation position of the terminal secondary lock (4) is provided with two switchable states, including a pre-installed position and a locked position. When the terminal secondary lock (4) is located in the pre-installed position, it is connected to the terminal shell (7) as a whole, but the large terminal cavity (701) and the small terminal cavity (702) can both be plugged in and out of the female terminal. When the terminal secondary lock (4) is located in the locked position, it is connected to the terminal shell (7) as a whole, and the female terminal cannot be pulled out from the terminal shell (7). A second partition groove (704) is provided between the outer walls of the large terminal cavity (701) and the small terminal cavity (702); a first positioning surface (705) is formed by extending the bottom of the second partition groove (704); a large end locking opening (7012) communicating with the large terminal cavity (701) is provided on the outer walls opposite to the second partition groove (704); and a small end locking opening (7022) communicating with the small terminal cavity (702) is provided at the bottom of the second partition groove (704); The terminal secondary lock (4) is a frame-shaped structure and is provided with a side beam (41), a front beam (42) and a rear beam (44); a large end lock tongue (441) is protruding from the inner side surface of the rear beam (44); at least one snap-fit ​​boss (706) is provided on the outer wall of the large terminal cavity (701) or the small terminal cavity (702); the terminal secondary lock (4) is sleeved on the outer walls of the two large terminal cavities (701) and is locked between the snap-fit ​​boss (706) and the first positioning surface (705); The terminal secondary lock (4) is restricted to a pre-installed position or a locked position by a snap-fit ​​structure matching the terminal housing (7); When the terminal secondary lock (4) is in the locked position, the large end lock tongue (441) extends into the large end lock opening (7012), and its upper end surface abuts against the shoulder surface of the large terminal head (61) of the large female terminal (6); the front beam (42) extends into the small end lock opening (7022), and its upper end surface abuts against the shoulder surface of the small terminal head (51) of the small female terminal (5); The inner plug (3) is provided with an inner terminal shell (71) for inserting a female terminal, a plug lock cavity (711) is provided on one side of the inner terminal shell (71), locking bosses (7111) are provided on both sides of the interior of the plug lock cavity (711), and two cantilever plates (712) of a cantilevered structure are provided on the outside of the plug lock cavity (711), the upper ends of the cantilever plates (712) are connected to the body of the inner terminal shell (71), and the lower ends thereof are connected and fixed with a second handle (7121), and a plug lock buckle (7122) is also connected between the cantilever plates (712); A plug secondary lock (32) is inserted into the plug lock cavity (711), and the plug secondary lock (32) is provided with a frame-shaped base (321). An upper positioning groove (322) and a lower positioning groove (323) are provided on both sides of the base (321), and a fourth boss (324) and a first handle (325) for withdrawing the plug secondary lock (32) are provided at the bottom. The base (321) is located in the plug lock cavity (711), and the locking boss (7111) is clamped in the upper positioning groove (322) or the lower positioning groove (323); A plug lock tongue (151) is provided on the corresponding inner wall of the inner mounting cavity (15), and a guide slope is provided on the lower end surface of the plug lock tongue (151). When the locking boss (7111) is located in the lower positioning groove (323), the lower end surface of the plug lock buckle (7122) abuts against the upper end surface of the plug lock tongue (151), and the outer side surface of the fourth boss (324) of the plug secondary lock (32) abuts against the inner side surface of the second handle (7121).

2. The integrated large and small current through-cylinder connector according to claim 1 is characterized in that: A glue-filling area (17) is provided at the bottom of one of the outer mounting cavity (14) and the inner mounting cavity (15), and a blocking plate (18) is provided at the bottom of the other cavity. The blocking plate (18) is located between the two large male terminals (13) and between the large male terminal (13) and the small male terminal (12).

3. The integrated large and small current through-cylinder connector according to claim 1 is characterized in that: A first partition groove (703) communicating with the second partition groove (704) is provided between the outer walls of the large terminal cavity (701), a middle beam (43) is connected to the middle of the front beam (42) and the rear beam (44), the middle beam (43) is located in the first partition groove (703), and pre-installed positioning grooves (431) and locking positioning grooves (432) are provided on both sides of the middle beam (43), and an elastic groove (45) is provided through the middle of the middle beam, and a positioning boss (7011) protruding into the first partition groove (703) is provided on the adjacent outer walls of the two large terminal cavities (701), and the positioning boss (7011) is clamped in the pre-installed positioning groove (431) or the locking positioning groove (432).

4. The integrated large and small current through-cylinder connector according to claim 1 is characterized in that: A first partition groove (703) communicating with the second partition groove (704) is provided between the outer walls of the large terminal cavity (701), a middle beam (43) is connected to the middle of the front beam (42) and the rear beam (44), the middle beam (43) is located in the first partition groove (703), and at least one of its two side surfaces is provided with a pre-installed positioning groove (431) and a locking positioning groove (432), and a positioning boss (7011) is provided on the adjacent outer wall of the corresponding large terminal cavity (701), and the positioning boss (7011) is clamped in the pre-installed positioning groove (431) or the locking positioning groove (432).

5. The integrated large and small current through-cylinder connector according to claim 1 is characterized in that: The outer plug (2) is further provided with an outer base (22) for mounting an outer terminal housing (72) and connecting to the intermediate base (1); An upper mounting cavity (221) for inserting an outer terminal shell (72) is provided in the outer base (22); a plurality of first ribs (2211) are protruding from the inner wall of the upper mounting cavity (221); a first groove (723) is correspondingly provided on the outer terminal shell (72); the first rib (2211) is inserted into the first groove (723), and its lower end abuts against the bottom of the first groove (723); A sealing boss (721) is provided on the periphery of the middle portion of the outer terminal shell (72), the lower end surface of the sealing boss (721) is a first positioning surface (705), and an outer sealing ring (24) is sleeved on the upper end surface of the sealing boss (721); The outer base (22) is further provided with a lower mounting cavity (222) for inserting the side wall of the outer mounting cavity (14); a plurality of second grooves (2221) are provided on the inner wall of the lower mounting cavity (222); a plurality of third ribs (142) are correspondingly provided on the outer wall of the outer mounting cavity (14); the third ribs (142) are clamped in the second grooves (2221); and the inner wall of the outer mounting cavity (14) abuts against the outer side surface of the outer sealing ring (24); A plurality of second ribs (141) are provided on the inner wall of the outer mounting cavity (14), and a plurality of positioning blocks (722) are provided on the outer wall of the small terminal cavity (702) of the outer terminal housing (72) opposite to the second partition groove (704), wherein the positioning blocks (722) are inserted between the second ribs (141); A corresponding position of the lower mounting cavity (222) is provided with an avoidance hole (2222) for pushing the terminal secondary lock (4).

6. The integrated large and small current through-cylinder connector according to claim 5 is characterized in that: The outer base (22) is provided with a handle (23) for secondary safety locking of the intermediate base (1) and the outer plug (2), and the intermediate base (1) is correspondingly provided with a locking shaft (16).

7. The integrated large and small current through-cylinder connector according to claim 1 is characterized in that: The fourth boss (324) is provided with an anti-error inclined block (326), and an anti-error boss (327) is provided on the outer side of the anti-error inclined block (326). The lower end surface of the anti-error boss (327) is a transition inclined surface, and the upper end surface thereof is a plane. When the locking boss (7111) is clamped in the upper positioning groove (322), the upper end surface of the anti-error boss (327) abuts against the lower end surface of the plug lock buckle (7122). When the locking boss (7111) is clamped in the lower positioning groove (323), the transition inclined surface of the anti-error boss 327 abuts against the upper end surface of the plug lock buckle (7122).

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