Low-voltage large-current connector

Abstract

The invention discloses a low-voltage large-current connector, and relates to the technical field of connectors, the low-voltage large-current connector comprises a plug assembly and a socket assembly, the socket assembly comprises a socket terminal connected in a socket sheath, the plug assembly comprises a pin connected in a plug sheath, the socket terminal and the pin are plugged in a corresponding manner, and the socket sheath and the plug sheath are plugged in a corresponding manner. The plug assembly is inserted into the socket assembly through a rocker, and the socket sheath is connected with a TPA used for secondary locking of the socket terminals and a CPA used for secondary locking of the rocker. When the socket terminal is hooked and limited by the main elastic tongue and the auxiliary elastic tongue of the socket sheath, the connection part of the plugging part and the wiring part of the socket terminal is blocked by the TPA, so that the holding force of the socket terminal in the socket sheath is greatly increased, and after the plug assembly and the socket assembly are plugged in each other by rotating the rocker, the plug assembly and the socket assembly can be prevented from being damaged. The CPA can be pushed into the final position from the preassembling position, so that secondary limiting of the rocker at the final position is realized, and the technical problem of unreliable connection of the existing large-current connector is solved.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, in particular to a low-voltage and high-current connector. Background Art

[0002] In some low-voltage applications of new energy vehicle circuits, such as the electrical connection of the power supply, grounding, battery, DCDC and other interfaces of the domain controller, connectors that can carry tens to hundreds of amperes of current are required. Due to the Joule heat that cannot be ignored under high current conditions, low-voltage and high-current connectors must be able to adapt to larger wire diameters, have lower connection resistance and stronger heat dissipation capabilities, and overcome other associated problems arising therefrom. For example, the problem of socket terminals falling off due to insufficient retention force in the socket sheath for socket terminals that are adapted to large wire diameters; the problem of large wire diameter wires being pulled or swung, which affects the connection of socket terminals in the socket sheath; in order to obtain lower connection resistance, ultrasonic welding is used to connect the socket terminals and the wires, resulting in deformation or even breakage of the socket terminal electrical contact springs due to the violent vibration of ultrasonic welding; the plug and socket components of the high-current connector have large insertion and separation forces, which makes it difficult to insert and separate by hand; and so on.

[0003] The Chinese utility model patent with the authorization announcement date of 2019.12.20 and the authorization announcement number of CN 209823007 U discloses a straight head connector with a lever handle, including a socket assembly and a plug assembly, the plug assembly including a plug housing, a plug handle locking slider, a plug wire assembly, a plug tail back cover, a lever handle, a plug high-voltage interlocking assembly and a plug terminal sleeve, the plug end of the plug terminal sleeve is plugged and connected with the insertion end of the plug wire assembly, the socket assembly includes a socket housing, a socket shielding ring, a socket male terminal, a socket male terminal fixing back cover, a socket high-voltage interlocking male terminal, a high-voltage interlocking wire and a socket high-voltage interlocking terminal locking slider, the socket high-voltage interlocking male terminal is fixed in the socket housing, the socket male terminal is fixed in the buckle on the socket housing, the socket high-voltage interlocking male terminal is connected to the socket male terminal, and the end of the socket male terminal is plugged and connected with the plug terminal. This straight connector only solves the connection problem between the plug assembly and the socket assembly from one aspect, overcoming the problem that the insertion and separation force of the high-current connector is large, which makes the insertion and separation operations difficult by hand. However, other associated problems of the high-current connector, such as the connection problem between the socket terminal and the socket sheath, and the connection problem between the socket terminal and the wire, cannot be overcome. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention provides a low-voltage high-current connector, which solves the technical problem of unreliable connection of existing high-current connectors.

[0005] The technical solution of this application is: A low-voltage, high-current connector comprises a plug assembly and a socket assembly, wherein the socket assembly comprises a socket terminal connected to a socket sheath, the plug assembly comprises a pin connected to the plug sheath, the socket terminal and the pin are plugged into each other, the socket sheath and the plug sheath are plugged into each other, the plug assembly is plugged into the socket assembly via a rocker, and the socket sheath is connected with a TPA for secondary locking of the socket terminal and a CPA for secondary locking of the rocker.

[0006] Preferably, the plug pin is connected with an electrical contact spring, the socket terminal comprises an inserting portion and a wiring portion, and the inserting portion is provided with a cavity matching the electrical contact spring.

[0007] Preferably, the socket sheath comprises two cavity holes arranged at intervals, the socket terminal is clamped in the cavity holes, and a ventilation hole for heat dissipation is provided between the two cavity holes.

[0008] Preferably, a main spring tongue and an auxiliary spring tongue which are hooked with the plug-in portion are provided in the cavity hole.

[0009] Preferably, the socket sleeve is provided with an opening along the first direction and a draw groove along the second direction, the opening is aligned with the hanging surfaces of the plug-in portion and the main spring tongue, the TPA is inserted into the opening along the first direction, and the elastic limiting hook of the TPA is hung with the limiting groove of the draw groove.

[0010] Preferably, the rocker is rotatably connected to the socket sleeve, and the rocker rotates between a pre-installation position and a final position. When the rocker is in the pre-installation position, the socket sleeve and the plug assembly are in an initial state of the insertion stroke. When the rocker rotates from the pre-installation position to the final position, the socket sleeve and the plug assembly enter a final state of the insertion stroke from the initial state of the insertion stroke.

[0011] Preferably, the rocker comprises two symmetrical side panels, the side panels are provided with vertical walls, and the socket sheath is provided with a rectangular limiting protrusion for limiting the rotation of the vertical walls.

[0012] Preferably, the two side panels are elastic, a cylindrical anchoring column is provided on the socket sleeve, the side panel is connected to the cylindrical anchoring column through a rotating circular hole, a preparatory position limit protrusion is provided on the socket sleeve, when the rocker is in the pre-installed position, the side panel is connected to the preparatory position limit protrusion through the preparatory position limit circular hole, a limit hook is provided on the socket sleeve, when the rocker is in the final position, the side panel is connected to the limit hook through a rectangular window, a slide is provided on the side panel, and the plug assembly is connected to the slide through a slide column.

[0013] Preferably, the CPA limit movement is between the pre-installation position and the final position. When the rocker is in the pre-installation position, the pre-installation position hanging platform of the socket cover forms a two-way limit stop against the second elastic hook of the CPA, and the limit hanging platform of the socket cover forms a two-way limit stop against the first elastic hook of the CPA. When the rocker rotates to the final position, the final position hanging platform of the socket cover forms a two-way limit stop against the second elastic hook of the CPA.

[0014] Preferably, the two side plates are connected via a top plate, and a pressing block is provided on the top plate. When the top plate rotates to a final position, the pressing block abuts against the second elastic hook.

[0015] The technical solution disclosed in the present invention has the following beneficial effects: 1. Conventional electrical contact springs are generally arranged on the socket terminals. However, since the socket terminals and the wires may be subjected to severe vibrations during ultrasonic welding, the electrical contact springs may be deformed or even broken. In the present invention, the electrical contact springs are arranged on the plug terminals of the plug assembly, and the plug terminals do not need to withstand ultrasonic welding vibrations. The plug-in portion of the socket terminal is only provided with a cavity with a rectangular cross-section, thereby solving the problem of deformation or even breakage of the electrical contact springs caused by severe vibrations generated during ultrasonic welding of the socket terminals and the wires.

[0016] 2. The plug-in part of the present invention is connected to one side of the wiring part and is stopped by the TPA installed in the final position, so that the socket terminal is simultaneously limited by the main spring tongue and the auxiliary spring tongue in the cavity hole of the socket sleeve and stopped by the TPA, which greatly increases the holding force of the socket terminal in the socket sleeve and solves the problem of terminal falling off caused by insufficient holding force in the socket sleeve for socket terminals with large wire diameters; if the socket terminal is not installed in place, the TPA will be stopped by the plug-in part and cannot be pushed from the pre-installed position to the final position, which plays a role in preventing assembly errors.

[0017] 3. The rocker uses the lever principle to reduce the force required for manual insertion or separation of plug assemblies and socket assemblies, solving the problem of difficulty in manual operation caused by large insertion and separation forces of high-current connectors, and improving the comfort of plug-in and assembly operations; only when the rocker is rotated to the final position can the CPA be pushed from the pre-installed position to the final position, which plays a role in preventing assembly errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0019] Figure 1 is a stereogram of a connector of the present invention; Figure 2 is a longitudinal cross-sectional view of the connector of the present invention along the axes of two wires; Figure 3 yes Figure 2 A partial enlarged view of middle A; Figure 4 is a transverse cross-sectional view of the connector of the present invention along the pin of the plug assembly; Figure 5 yes Figure 1 A perspective view of the middle socket assembly; Figure 6 It is a blow-up diagram of the socket assembly; Figure 7 is a longitudinal cross-sectional view of the socket assembly along the axes of two wires; Figure 8 is a transverse cross-sectional view of the socket assembly along the axis of the upper wire; Fig. 9 yes Figure 6 A stereogram of the middle socket terminal from a second viewing angle; Fig.10 yes Fig. 9 A partial enlarged view of the middle groove; Fig.11 yes Figure 1 A perspective view of the middle socket housing; Fig.12 is a top view of the socket sheath; Fig.13 is a transverse cross-sectional view of the socket sheath; Fig.14 is a longitudinal cross-sectional view of the socket sheath; Fig.15 yes Figure 1 Stereoscopic image of TPA in the middle; Fig.16 It is the rear view of TPA; Fig.17 It is a cross-sectional view of the TPA pre-installation position; Fig.18 It is a cross-sectional view of the final position of TPA; Fig.19 yes Figure 1 A stereogram of the first person perspective from the middle stick; Fig. 20 yes Figure 1 Stereoscopic image of the second perspective of the middle joystick; Fig.21 yes Figure 1 Stereoscopic image of CPA in the middle; Fig. 22 This is a three-dimensional picture of the CPA pre-installation position with the joystick hidden; Fig.23 It is a three-dimensional picture of the final position of CPA with the joystick hidden; Fig.24 yes Figure 1 A longitudinal cross-sectional view of the middle fixed wire cover; Fig.25 yes Figure 1 A perspective view of the middle plug assembly; Fig.26 This is a blow-up diagram of the plug assembly; Fig. 27 is a longitudinal cross-sectional view of the plug assembly; Fig.28 is a transverse cross-sectional view of the plug assembly along the pin; Fig.29 yes Fig.28 A partial enlarged view of B in the middle; Fig.30 It is a three-dimensional diagram of the socket assembly and the plug assembly in a turnover state before being plugged in; Fig.31 is a three-dimensional diagram of the socket assembly and the plug assembly in a state ready for plugging; Fig.32 It is a stereoscopic diagram of the initial state of the plugging stroke of the socket assembly and the plug assembly; Fig.33 It is a stereoscopic diagram of the final state of the plugging stroke of the socket assembly and the plug assembly; Fig.34 It is a partial cross-sectional view of the CPA rocker secondary locking structure.

[0020] Description of Figure Numbers: 0 socket assembly, 1 socket terminal, 101 plug-in portion, 102 wiring portion, 103 cavity, 104 interlaced structure, 105 notch, 106 groove, 107 slot, 2 socket sheath, 201 main spring tongue, 202 auxiliary spring tongue, 203 ventilation hole, 204 rectangular limiting protrusion, 205 pre-insertion limiting protrusion, 206 cylindrical anchor column, 207 drawer groove, 208 limiting hook, 209 pre-installed hanging platform, 210 Final position hanging platform, 211 hook, 212 opening, 213 limit hanging platform, 214 cavity hole, 215 slot, 216 limit slot, 3TPA, 301 elastic limit hook, 302 installation anti-error reinforcement, 303 boss, 304 disassembly blind hole, 4 rocker, 401 slide, 402 pressure block, 403 plug-in preparation limit circular hole, 404 rotating circular hole, 405 elastic plate, 406 rectangular window, 407 vertical wall, 408 L-shaped limiting protrusion, 5CPA, 501 first elastic hook, 502 second elastic hook, 503 L-shaped stopping protrusion, 6 wire fixing clamp, 601 elastic hoop, 602 step, 7 wire fixing cover, 701 rectangular frame, 702 elastic hanging platform, 703 extrusion part, 8 plug assembly, 801 pin, 8011 barb, 8012 shoulder, 8013 guide limiting protrusion, 8014 welding foot, 802 electrical contact spring, 8021 elastic beam, 8022 limiting flange, 8023 contact, 8024 highest position contact, 803 fixing card, 8031 ​​spring tongue, 8032 beam, 804 plug sleeve, 8041 sliding column, 8042 positioning column, 805 rib plate, 9 wires. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1, a low voltage high current connector, such as Figure 1 , Figure 2 and Figure 4 As shown, it includes a plug assembly 8 and a socket assembly 0, the socket assembly 0 includes a socket terminal 1 connected to the socket sheath 2, the plug assembly 8 includes a pin 801 connected to the plug sheath 804, the socket terminal 1 and the pin 801 are plugged into each other, the socket sheath 2 and the plug sheath 804 are plugged into each other, the plug assembly 8 is plugged into the socket assembly 0 through a rocker 4, and the socket sheath 2 is connected with a TPA3 for secondary locking of the socket terminal 1 and a CPA5 for secondary locking of the rocker 4.

[0023] Specifically, Figure 5 , Figure 6As shown, the socket assembly 0 is used as a line end connector, and the socket terminal 1 is used as the electrical contact element of the connector, which is formed by stamping and bending of a high-conductivity copper alloy sheet metal. The socket cover 2 is injection molded to insulate, protect and fix the socket terminal 1, and allows other components of the connector with different functions to be installed on the socket cover 2. TPA3 is injection molded to form a stop for the socket terminal 1 in the socket cover 2, thereby increasing the retention force of the socket terminal 1 in the socket cover 2. The rocker 4 is injection molded, and the lever principle is used to reduce the force required for manual plug-in operation, so as to solve the problem of difficulty in manual plug-in and disconnection operation caused by large plug-in and disconnection force of high-current connectors, and improve the comfort of plug-in assembly operation. CPA5 is injection molded to form a stop for the rocker 4 rotated to the final position, to prevent the rocker 4 from accidentally disengaging from the final position and causing the connector to be separated, thereby improving the reliability of the connection.

[0024] Specifically, Figure 25 to Figure 29 As shown, the plug assembly 8 is used as a board-end connector. The pin 801 of the plug assembly 8 is formed by sheet metal stamping and assembled with the plug sheath 804 by interference press fitting. The pin 801 is symmetrically provided with barbs 8011 on both sides to increase the retention force of the pin 801 after interference press fitting in the plug sheath 804. The pin 801 is symmetrically provided with bosses 8012 for limiting the position during interference press fitting to avoid overpressure. The tail of the pin 801 is provided with a plurality of solder pins 8014 for soldering with the circuit board. The plug sheath 804 is also provided with a positioning column 8042 for positioning with the positioning hole of the circuit board to prevent the solder pins 8014 of the pin 801 from deviating during soldering.

[0025] Furthermore, the tail of the pin 801 is welded to the circuit board, and then the head of the pin 801 is plugged into the socket terminal 1, the plug sheath 804 is plugged into the socket sheath 2, and the socket assembly 0 is connected to the wire through the socket terminal 1, so that the connection between the circuit board and the wire can be achieved. After the plug assembly 8 and the socket assembly 0 are plugged and connected through the rocker 4, the rotating rocker 4 is stopped by CPA5, thereby realizing the secondary locking of the plug sheath 804 and the socket sheath 2. The connection reliability of the socket terminal 1 in the socket sheath 2 also affects the connection reliability of the plug assembly 8 and the socket assembly 0. The socket terminal 1 is clamped in the socket sheath 2, and the clamping direction of the socket terminal 1 is secondary stopped by TPA3, so that the socket terminal 1 is reliably connected in the socket sheath 2, thereby improving the reliability of the connection between the socket terminal 1 and the pin 801, and greatly improving the reliability of the connection between the plug assembly 8 and the socket assembly 0.

[0026] Furthermore, the plug assembly 8 and the socket assembly 0 are both connected to the rotating rocker 4. By rotating the rocker 4, the distance between the plug assembly 8 and the socket assembly 0 is reduced or increased, thereby realizing the plugging and loosening of the plug assembly 8 and the socket assembly 0. The lever principle is used to reduce the force required for manual plugging and unplugging operations, solve the problem that the plugging and separation forces of connectors adapted to large currents are large, which makes manual plugging and separation operations difficult, and improve the comfort of plugging and assembly operations.

[0027] Embodiment 2, based on embodiment 1, a low voltage high current connector, such as Figure 2 , Figure 3 , Figure 4 As shown, the plug pin 801 is connected to an electrical contact spring 802 , and the socket terminal 1 includes a plug-in portion 101 and a wiring portion 102 . The plug-in portion 101 is provided with a cavity 103 matching the electrical contact spring 802 .

[0028] Specifically, Figure 25 to Figure 29 As shown, the wire 9 of this embodiment adopts a large-diameter wire that complies with relevant standards. The plug assembly 8 is composed of a pin 801, an electrical contact spring 802, a fixing card 803, and a plug sheath 804. The plug sheath 804 is provided with a rib plate 805, which is plugged into the slot 215 of the socket sheath 2. The electrical contact spring 802 is formed by sheet metal stamping and bending, and is U-shaped as a whole. A guide and limit boss 8013 is provided on the head of the pin 801 to play a guiding and limiting role when the electrical contact spring 802 is installed on the pin 801. The electrical contact spring 802 is symmetrically distributed with a number of elastic beams 8021, and a highest contact 8024 is provided at the highest point of the elastic beam 8021 for interference fit electrical contact with the cavity 103 of the socket terminal 1. The highest contact 8024 of the elastic beam 8021 is arranged in two levels in an alternating manner to reduce the peak value of the insertion force, so as to solve the problem that the insertion and separation force of the high-current connector is large, resulting in difficulty in manual insertion and separation operations.

[0029] Furthermore, if Figure 2 , Figure 3 , Figure 4 , Figure 25 to Figure 29As shown, the roots of both ends of each elastic beam 8021 of the electric contact spring 802 are provided with contact points 8023 for electrical contact between the electric contact spring 802 and the plug pin 801. The tail of the electric contact spring 802 is symmetrically provided with limit flanges 8022 for fixing the position of the electric contact spring 802. After the electric contact spring 802 is installed on the plug pin 801, the fixing card 803 is sleeved on the plug pin 801 and self-lockingly hooked with the plug sheath 804 by means of a plurality of elastic tongues 8031, and the limit flanges 8022 of the electric contact spring 802 are blocked and limited. The thickness of the beams 8032 on both sides of the rectangular frame of the fixing card 803 is slightly smaller than the distance between the highest and highest contacts 8024 of the elastic beams 8021 of the electrical contact spring 802. This distance difference is the allowable deformation of the elastic beams 8021, which limits the deformation of the elastic beams 8021 of the electrical contact spring 802, thereby preventing the loss of positive force caused by irreversible excessive deformation in extreme cases.

[0030] Furthermore, the conventional terminal electrical contact spring is generally arranged on the socket terminal 1, but since the socket terminal 1 and the wire 9 are subjected to severe vibration during the ultrasonic welding process, the electrical contact spring may be deformed or even broken. In the present invention, the electrical contact spring 802 is arranged on the plug pin 801 of the plug assembly 8, and the plug pin does not need to withstand the ultrasonic welding vibration. The plug-in portion 101 of the socket terminal 1 is only provided with a cavity 103 with a rectangular cross-section, which solves the problem that the electrical contact spring is deformed or even broken due to the severe vibration generated by the ultrasonic welding of the socket terminal 1 and the wire 9.

[0031] Furthermore, if Figure 2 , Figure 3 , Figure 4 , Fig. 9 , Fig.10 As shown, after the socket terminal 1 and the plug pin 801 are plugged together, the cavity 103 of the plug part 101 and the electrical contact spring of the plug pin 801 are in interference fit, and the electrical contact spring of the plug pin 801 is deformed under pressure to generate a positive force, thereby achieving plug-in electrical contact. Insertion structures 104 are provided at two bent closed parts of the plug part 101. The insertion structure 104 uses a protrusion penetrating into a through hole to achieve dimensional stability of the plug part 101 after it is subjected to a positive force, thereby preventing the plug part 101 from being stretched open by the electrical contact spring 802, resulting in attenuation of the positive force and deterioration of the contact resistance.

[0032] Furthermore, if Fig. 9 and Fig.10As shown, in order to achieve a lower connection resistance between the socket terminal 1 and the wire 9, the crimping connection method is abandoned and the wire 9 is connected to the above-mentioned connection part 102 by ultrasonic welding. The connection part 102 of the socket terminal 1 is shaped like a rectangular flat plate, and a plurality of grooves 106 with a V-shaped cross section are provided on one side where the connection part 102 is connected to the wire 9. The above-mentioned V-shaped grooves 106 can increase the welding contact area between the terminal connection part 102 and the wire 9, thereby further reducing the connection resistance between the wire 9 and the connection part 102 and increasing the pull-off force between the wire 9 and the socket terminal 1.

[0033] Furthermore, if Figure 6 , Figure 7 and Figure 8 As shown, the wire 9 is fixed to the tail of the socket sheath 2 by the wire clamp 6 and the wire cover 7. The wire clamp 6 is injection molded to tighten the wire 9 with a large wire diameter under the extrusion of the wire cover 7, reducing the adverse effects of the wire 9 with a large wire diameter being pulled or swung on the normal hanging of the socket terminal 1 in the socket sheath 2. The wire clamp 6 is provided with a plurality of guide positioning columns, and the tail of the socket sheath 2 is provided with a guide positioning groove. The guide positioning columns cooperate with the guide positioning groove to guide and position the wire clamp 6. The wire clamp 6 is symmetrically provided with coaxial conical elastic hoop 601. The conical elastic hoop 601 shrinks and tightens the wire 9 with a large wire diameter under the extrusion of the wire cover 7. The inner surface of the elastic hoop 601 is provided with a step 602. The step 602 strengthens the clamping and clamping effect of the elastic hoop 601 on the wire 9 with a large wire diameter. The wire clamp 6 prevents the portion of the large-diameter wire 9 that is clamped and the portion of the large-diameter wire 9 that is located in the cavity hole 214 of the socket sheath 2 from moving or swinging easily when subjected to external pulling or swinging, thereby reducing the adverse effects of the wire 9 on the normal hanging of the terminal in the socket sheath 2 due to external pulling or swinging.

[0034] like Fig.24As shown, the wire fixing cover 7 is also injection molded to squeeze the elastic hoop 601 of the wire fixing clamp 6 to tighten the large-diameter wire 9, reducing the adverse effects of the large-diameter wire 9 being pulled or swung on the normal hanging of the socket terminal 1 in the socket sheath 2. The wire fixing cover 7 is provided with a rectangular frame opening 701 with rounded corners, which is clearance-matched with the wire fixing clamp 6 and the tail of the socket sheath 2. The wire fixing cover 7 is symmetrically provided with an elastic hanging platform 702, and the tail of the socket sheath 2 is provided with a hook 211. The elastic hanging platform 702 is hung and matched with the hook 211 and is stopped by the hook 211 at the tail to prevent the wire fixing cover 7 from falling off. The wire fixing cover 7 is provided with an extrusion portion 703 with a conical inner surface. During the assembly process of the wire fixing cover 7, the extrusion portion 703 squeezes the conical elastic hoop 601 of the wire fixing clamp 6 to shrink the hoop 601 to tighten the wire 9. The wire fixing cover 7 prevents the part of the wire 9 that is clamped and the part of the wire 9 located in the cavity hole 214 from moving or swinging easily when being pulled or swung externally, thereby reducing the adverse effects of the wire 9 on the normal hanging of the socket terminal 1 in the socket sheath 2 caused by external pulling or swinging.

[0035] Embodiment 3, based on embodiment 2, a low voltage high current connector, such as Figure 5 , Figure 6 , Figure 7 As shown, the socket sheath 2 comprises two cavity holes 214 arranged at intervals, the socket terminal 1 is clamped in the cavity holes 214, and a ventilation hole 203 for heat dissipation is provided between the two cavity holes 214.

[0036] Specifically, the socket sheath 2 of this embodiment is injection molded to insulate, protect and fix the socket terminal 1. The socket sheath 2 is provided with two upper and lower spaced cavity holes 214, and the socket terminal 1 is clamped inside the cavity hole 214. A ventilation hole 203 is provided in the middle of the socket sheath 2 to allow air to flow freely to achieve the purpose of heat dissipation and cooling.

[0037] Embodiment 4, based on embodiment 3, a low voltage high current connector, such as Figure 7 , Figure 8 , Fig.11 , Fig.13 , Fig.14 As shown, a main spring tongue 201 and an auxiliary spring tongue 202 which are hooked to the plug-in portion 101 are disposed in the cavity hole 214 .

[0038] Specifically, the wiring portion 102 in this embodiment is connected to one end of the plug portion 101 and is flush with the lower surface of the plug portion 101. The upper half of the plug portion 101 of the socket terminal 1 is used to hook the main spring tongue 201 in the cavity hole of the socket sheath 2. A notch 105 is provided on one side of the plug portion 101 of the socket terminal 1 for hooking the auxiliary spring tongue 202. The main spring tongue 201 and the auxiliary spring tongue 202 jointly fix the socket terminal 1 in the cavity hole 214 of the socket sheath 2 through hooking, thereby avoiding the problem of the socket terminal 1 falling off due to insufficient holding force of the socket terminal 1 adapted to a large wire diameter in the socket sheath 2.

[0039] Embodiment 5, based on embodiment 4, a low voltage high current connector, such as Figures 5 to 9 , Fig.11 , Fig.12 , Figures 15 to 18 As shown, the socket sleeve 2 is provided with an opening 212 along the first direction and a groove 207 along the second direction, the opening 212 is aligned with the hanging surfaces of the plug-in portion 101 and the main spring tongue 201, the TPA3 is inserted into the opening 212 along the first direction, and the elastic limiting hook 301 of the TPA3 is hung with the limiting groove 216 of the groove 207. In this embodiment, the top of the socket sheath 2 is provided with an opening 212 for accommodating TPA3. Along the insertion direction of the plug assembly 8, the socket sheath 2 is symmetrically provided with two extraction grooves 207 connected to the opening 212. The outer surfaces of the two extraction grooves 207 are symmetrically provided with limiting grooves 216 matching the shape of the elastic limiting hook 301. There are four limiting grooves 216 in total, two of which are provided on each outer surface. The two limiting grooves 216 correspond to the pre-installed position and the final position of the elastic limiting hook 301 respectively. The extraction groove 207 is used to pull the core when forming the limiting groove 216. The limiting groove 216 is connected with the elastic limiting hook 301 of TPA3 to prevent TPA3 from easily falling out of the opening 212, and allows TPA3 to switch between the pre-installed position and the final position. At the same time, a card slot 107 is provided at the connection between the plug-in portion 101 and the wiring portion 102 of the socket terminal 1, and the two short sides of the plug-in portion 101 connected to the wiring portion 102 are blocked by the TPA3 installed in the final position. Since the socket terminal 1 is simultaneously limited by the main spring tongue 201 and the auxiliary spring tongue 202 in the cavity hole 214 of the socket sleeve 2 and blocked by TPA3, the holding force of the socket terminal 1 in the socket sleeve 2 is greatly increased, and the problem of the socket terminal 1 falling off due to insufficient holding force in the socket sleeve 2 for the socket terminal 1 adapted to a large wire diameter is solved.

[0040] Furthermore, TPA3 is installed into the socket housing 2 from the opening 212, and TPA3 is provided with an anti-misalignment rib 302 to ensure the uniqueness of the installation orientation of TPA3. TPA3 is symmetrically provided with elastic limit hooks 301 for hanging and cooperating with the limit grooves 216 on the socket housing 2 so as not to fall off easily, and can be switched between the pre-installed position and the final position. When TPA3 is in the pre-installed position, the socket terminal 1 can be smoothly installed into the cavity hole 214 without being blocked by TPA3. After the socket terminal 1 is installed into the cavity hole 214 and is hung by the main spring tongue 201 and the auxiliary spring tongue 202, TPA3 can be smoothly pushed into the final position. At this time, the two short sides of the plug-in part 101 connecting the wiring part 102 are blocked by the boss 303 of TPA3 installed in the final position, which increases the holding force of the socket terminal 1 in the socket housing 2 and avoids the problem of the socket terminal 1 falling off due to insufficient holding force of the socket terminal 1 adapted to a large wire diameter in the socket housing 2. If the socket terminal 1 is not installed in place, the TPA3 cannot be smoothly pushed from the pre-installed position to the final position due to the blocking of the plug-in portion 101, thereby playing the role of preventing assembly errors. The top of the TPA3 is also symmetrically provided with disassembly blind holes 304 for easy disassembly of the TPA3 during maintenance.

[0041] Embodiment 6, based on embodiment 5, a low voltage high current connector, such as Figure 30 to Figure 33 As shown, the rocker 4 is rotatably connected to the socket sleeve 2, and the rocker 4 rotates between the pre-installation position and the final position. When the rocker 4 is in the pre-installation position, the socket sleeve 2 and the plug assembly 8 are in the initial state of the insertion stroke. When the rocker 4 rotates from the pre-installation position to the final position, the socket sleeve 2 and the plug assembly 8 enter the final state of the insertion stroke from the initial state of the insertion stroke.

[0042] Specifically, when the socket assembly 0 and the plug assembly 8 are plugged together, the rocker 4 is manually rotated to rotate the rocker 4 from the final position to the preparatory position for plugging together. At this time, the socket assembly 0 and the plug assembly 8 are plugged together. Then, during the process of manually rotating the rocker 4 from the pre-installed position to the final position, the rocker 4 applies force to the plug assembly 8 to make the plug assembly 8 close to the socket assembly 0 to complete the plugging. The rocker 4 is rotated in the opposite direction to apply force to the plug assembly 8 to make the plug assembly 8 away from the socket assembly 0 to complete the separation.

[0043] Embodiment 7, based on embodiment 6, a low voltage high current connector, such as Fig.19 , Fig. 20 As shown, the rocker 4 includes two symmetrical side panels, each of which is provided with a vertical wall 407 , and the socket sheath 2 is provided with a rectangular limiting protrusion 204 for limiting the rotation of the vertical wall 407 .

[0044] Specifically, rectangular limiting protrusions 204 are symmetrically arranged on the outer surfaces of the two symmetrical side panels, and the rectangular limiting protrusions 204 can block the vertical wall 407 of the rocker 4. Regardless of whether the rocker 4 is in the pre-installation position or the final position, the vertical wall 407 of the rocker 4 is blocked by the rectangular limiting protrusions 204 symmetrically arranged on the outer surfaces of the side panels, so that the rocker 4 can only rotate a certain angle between the predetermined pre-installation position and the final position, and cannot exceed the above rotation range.

[0045] Embodiment 8, based on embodiment 7, a low voltage high current connector, such as Fig.11 , Fig.19 , Fig. 20 , Fig.25 As shown, the two side panels are elastic, a cylindrical anchoring column 206 is provided on the socket sleeve 2, and the side panel is connected to the cylindrical anchoring column 206 through a rotating circular hole 404, and a plug-in preparation position limiting protrusion 205 is provided on the socket sleeve 2. When the rocker 4 is in the pre-installed position, the side panel is connected to the plug-in preparation position limiting protrusion 205 through the plug-in preparation position limiting circular hole 403, and a limiting hook 208 is provided on the socket sleeve 2. When the rocker 4 is in the final position, the side panel is connected to the limiting hook 208 through a rectangular window 406, and a slide 401 is provided on the side panel, and the plug assembly 8 is connected to the slide 401 through a slide column 8041.

[0046] Specifically, the two side plates of the rocker 4 are symmetrically provided with rotating circular holes 404, and the outer surface of the socket sheath 2 is symmetrically provided with cylindrical anchoring columns 206, and the rotating circular holes 404 and the cylindrical anchoring columns 206 are clearance-matched to anchor the rotating axis of the rocker 4 and prevent the rocker from falling off. The rocker 4 is symmetrically provided with arc-shaped slideways 401 with a constant width, and the slideways 401 are clearance-matched with the slide columns 8041 of the plug assembly 8.

[0047] The two side panels are symmetrically provided with plug-in preparation position limiting circular holes 403, and the outer surface of the socket sheath 2 is symmetrically provided with a cylindrical plug-in preparation position limiting protrusion 205. The plug-in preparation position limiting circular holes 403 cooperate with the plug-in preparation position limiting protrusion 205, so that the operator only needs to manually move the rocker 4 once to limit the rocker 4 to the predetermined plug-in preparation position without easily deviating, which is convenient for the main engine manufacturer's plug-in operation.

[0048] Each side panel includes an elastic plate 405, on which a rectangular window 406 is provided. The outer surface of the socket sheath 2 is symmetrically provided with limit hooks 208. When the rocker 4 rotates to the final position, the rectangular window 406 is hooked with the limit hook 208, limiting the rocker 4 in the final position and preventing it from falling out easily.

[0049] Embodiment 9, based on embodiment 8, a low voltage high current connector, such as Figure 21 to Figure 23As shown, the CPA5 limit movement is between the pre-installation position and the final position. When the rocker 4 is in the pre-installation position, the pre-installation hanging platform 209 of the socket cover 2 forms a two-way limit stop with the second elastic hook 502 of the CPA5 and the limit hanging platform 213 of the socket cover 2 forms a two-way limit stop with the first elastic hook 501 of the CPA5. When the rocker 4 rotates to the final position, the second elastic hook 502 of the CPA5 and the final position hanging platform 210 of the socket cover 2 form a two-way limit stop.

[0050] Specifically, Fig.11 , Fig.12 , Fig. 22 and Fig.23 As shown, the outer surface of the socket sheath 2 is provided with a limit hanging platform 213, a pre-installation hanging platform 209 and a final position hanging platform 210 for limiting the position of CPA5. The pre-installation hanging platform 209 acts on the second elastic hook 502 to prevent CPA5 from moving to the final position and prevent CPA5 from accidentally entering the final position from the pre-installation position. The first elastic hook 501 is blocked by the limit hanging platform 213, so that CPA5 can only be separated from the socket sheath 2 when subjected to great violence, preventing CPA from easily separating from the socket sheath 2. The two-way limit stop is mainly achieved by the limit hanging platform 213 blocking the first elastic hook 501 in the outward direction, and the second elastic hook 502 can also play a part of the outward stop, while the inward stop is completely achieved by the second elastic hook 502 and the pre-installation hanging platform 209. When the rocker 4 rotates to the final position, the final position hanging platform 210 acts on the second elastic hook 502, so that CPA5 is subject to two-way limit stop. When the rocker 4 rotates to the final position, the CPA5 can enter the final position from the pre-installed position, thereby playing a role in assembly error prevention and realizing the conversion of the CPA5 between the pre-installed position and the final position.

[0051] Embodiment 10, based on embodiment 9, is a low voltage and high current connector, wherein the two side plates are connected by a top plate, a pressing block 402 is provided on the top plate, and when the top plate rotates to the final position, the pressing block 402 abuts against the second elastic hook 502.

[0052] In this embodiment, CPA5 is injection molded to form a stop for the rocker 4 in the final position, and together with the limit hook 208 of the socket sheath 2, prevent the rocker 4 from accidentally disengaging from the final position and causing the connector to separate, thereby improving the reliability of the connection.

[0053] Specifically, the rocker 4 is provided with a pressing block 402, the CPA5 is provided with a first elastic hook 501 and a second elastic hook 502, the pre-installation position hanging platform 209 of the socket cover 2 forms a two-way limit stop for the CPA5 with the second elastic hook 502 of the CPA5, the limit hanging platform of the socket cover 2 and the first elastic hook 501 of the CPA5, preventing the CPA5 from easily falling off outward or easily entering the final position inward. When the rocker 4 rotates to the final position, the second elastic hook 502 is pressed down by the pressing block 402 on the rocker 4, eliminating the blocking effect of the pre-installation position hanging platform 209 of the socket cover 2 on the movement of the CPA5 from the pre-installation position to the final position, so that the second elastic hook 502 of the CPA5 can pass over the pre-installation position hanging platform 209 of the socket cover 2 and be pushed into the final position, and be connected with the final position hanging platform 210 of the socket cover 2 to form a new two-way limit stop, thereby playing a role in assembly error prevention and realizing the conversion of the CPA5 between the pre-installation position and the final position.

[0054] Furthermore, if Fig.34 As shown, on the basis of the primary locking of the rocker 4 by the limit hook 208, the CPA5 performs a secondary locking function on the rocker 4. When the CPA5 slides from the pre-installed position to the final position, the L-shaped stop protrusion (503) of the CPA5 slides into the L-shaped limit protrusion (408) of the rocker 4, and the two are engaged with each other. This engagement prevents the rocker 4 from easily leaving the final position, thus performing a secondary locking function.

[0055] The details not described in detail in the present invention are all conventional technical means known to those skilled in the art.

[0056] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A low voltage and high current connector, characterized in that: The invention comprises a plug assembly (8) and a socket assembly (0), wherein the socket assembly (0) comprises a socket terminal (1) connected to a socket sheath (2), and the plug assembly (8) comprises a plug pin (801) connected to a plug sheath (804). The socket terminal (1) and the plug pin (801) are plugged into each other, and the socket sheath (2) and the plug sheath (804) are plugged into each other. The plug assembly (8) is plugged into the socket assembly (0) via a rocker (4), and the socket sheath (2) is connected to a TPA (3) for secondary locking of the socket terminal (1) and a CPA (5) for secondary locking of the rocker (4).

2. The low voltage and high current connector according to claim 1, characterized in that: The plug pin (801) is connected to an electrical contact spring (802), the socket terminal (1) comprises a plug-in portion (101) and a wiring portion (102), and the plug-in portion (101) is provided with a cavity (103) matching the electrical contact spring (802).

3. The low voltage and high current connector according to claim 2, characterized in that: The socket sheath (2) comprises two cavity holes (214) arranged at intervals, the socket terminal (1) is clamped in the cavity hole (214), and a ventilation hole (203) for heat dissipation is provided between the two cavity holes (214).

4. The low voltage and high current connector according to claim 3, characterized in that: A main spring tongue (201) and an auxiliary spring tongue (202) which are hooked to the plug-in portion (101) are provided in the cavity hole (214).

5. The low voltage and high current connector according to claim 4, characterized in that: The socket shield (2) is provided with an opening (212) along a first direction and a draw groove (207) along a second direction, the opening (212) being aligned with the connecting portion (101) and the hanging surface of the main elastic tongue (201), the TPA (3) being inserted into the opening (212) along the first direction, and the elastic limiting hook (301) of the TPA (3) being hung with the limiting groove (216) of the draw groove (207).

6. The low voltage and high current connector according to claim 5, characterized in that: The rocker (4) is rotatably connected to the socket sheath (2), and the rocker (4) rotates between a pre-installation position and a final position. When the rocker (4) is in the pre-installation position, the socket sheath (2) and the plug assembly (8) are in an initial state of the insertion stroke. When the rocker (4) rotates from the pre-installation position to the final position, the socket sheath (2) and the plug assembly (8) enter a final state of the insertion stroke from the initial state of the insertion stroke.

7. The low voltage and high current connector according to claim 6, characterized in that: The rocker (4) comprises two symmetrical side panels, each of which is provided with a vertical wall (407), and the socket sheath (2) is provided with a rectangular limiting protrusion (204) for limiting the rotation of the vertical wall (407).

8. The low voltage and high current connector according to claim 7, characterized in that: The two side panels are both elastic, a cylindrical anchoring column (206) is provided on the socket cover (2), and the side panel is connected to the cylindrical anchoring column (206) via a rotating circular hole (404), a plug-in preparation position limiting protrusion (205) is provided on the socket cover (2), and when the rocker (4) is in the pre-installed position, the side panel is connected to the plug-in preparation position limiting protrusion (205) via the plug-in preparation position limiting circular hole (403), a limit hook (208) is provided on the socket cover (2), and when the rocker (4) is in the final position, the side panel is connected to the limit hook (208) via a rectangular window (406), a slideway (401) is provided on the side panel, and the plug assembly (8) is connected to the slideway (401) via a slide column (8041).

9. The low voltage and high current connector according to claim 8, characterized in that: The CPA (5) moves in a limited position between a pre-installation position and a final position. When the rocker (4) is in the pre-installation position, the pre-installation position hanging platform (209) of the socket cover (2) forms a bidirectional limit stop for the second elastic hook (502) of the CPA (5), and the limit hanging platform (213) of the socket cover (2) forms a bidirectional limit stop for the first elastic hook (501) of the CPA (5). When the rocker (4) rotates to the final position, the final position hanging platform (210) of the socket cover (2) forms a bidirectional limit stop for the second elastic hook (502) of the CPA (5).

10. The low voltage and high current connector according to claim 9, characterized in that: The two side plates are connected via a top plate, and a pressing block (402) is provided on the top plate. When the top plate rotates to a final position, the pressing block (402) abuts against the second elastic hook (502).

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