A high-voltage waterproof power connector for new energy vehicles

Abstract

The present invention relates to the technical field of power connectors, and in particular discloses a high-voltage waterproof power connector for new energy vehicles, including a first connector and a second connector plugged with the first connector, the first connector including a first shell and a first terminal arranged on the first shell, the external second terminal is electrically connected to the water pump motor via the first terminal; a connecting plate is protruding from the outer side of the first shell, the first shell is detachably connected to the external water pump motor via the connecting plate, a pouring groove is provided at one end of the connecting plate away from the first shell, the first terminal penetrates the bottom wall of the pouring groove and is connected to the first shell, and waterproof glue is cast and molded in the pouring groove. The excellent waterproof performance of the connector in a high-pressure environment is improved by arranging a pouring groove on the outer side of the connecting plate and filling the pouring groove with waterproof glue; the applicability of the connector is improved by the detachable installation of the connecting plate and the water pump motor, and the maintenance and replacement of the first connector is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of power connectors, and in particular discloses a high-voltage waterproof power connector for new energy vehicles. Background Art

[0002] The connector on the water pump motor generally adopts the form of an integrated connection. Since the water pump motor works in moisture or water, a layer of waterproof glue will be applied where the terminal passes through the shell to achieve a waterproof function. In the prior art, the gluing position is generally set inside the shell, and this method has the following technical problems: Since the operating space inside the shell is small, more complex tooling and fixtures are required when gluing to ensure that the glue is accurately injected into the specific position inside. Such a design increases the production cost to a certain extent; in addition, during the gluing process inside the shell, it is not conducive to observing the glue state and the gluing effect, and it is impossible to detect whether there are problems such as glue leakage and lack of glue in time, which not only affects the overall waterproof performance, but also increases the defective rate. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a high-voltage waterproof power connector for new energy vehicles to solve the technical problems of poor waterproof performance and high production cost of the power connector in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides a high-voltage waterproof power connector for new energy vehicles, comprising a first connector and a second connector plugged into and mated with the first connector, wherein the first connector comprises a first shell and a first terminal arranged on the first shell, and the second terminal of the second connector is electrically connected to the water pump motor via the first terminal; a connecting plate is protruding from the outer side of the first shell, and the first shell is detachably connected to the external water pump motor via the connecting plate, and a pouring groove is provided at one end of the first shell and / or one end of the connecting plate, and the first terminal passes through the bottom wall of the pouring groove and is fixedly connected to the first shell, and external waterproof glue is cast in the pouring groove to fill the gap between the first shell and the first terminal.

[0005] Furthermore, the connecting plate is concavely formed with a first groove in the direction of the first shell, a flexible first sealing ring is provided in the first groove, the first groove is arranged around the outer wall of the pouring groove, the groove depth of the first groove is greater than the groove depth of the pouring groove, the first sealing ring is arranged on the end face protruding from the free end of the connecting plate, and the first sealing ring is used to seal the gap between the connecting plate and the water pump motor.

[0006] Furthermore, a microporous structure is opened on the bottom wall and side wall of the pouring trough, and the capillary effect is used to further absorb the waterproof glue poured in the pouring trough. After the waterproof glue is formed and solidified in the micropores, the connection between the waterproof glue body and the side wall and bottom wall of the pouring trough can be significantly increased, thereby ensuring the waterproof properties of the connector in harsh environments such as vibration and high temperature.

[0007] Furthermore, the connecting plate has a wing plate protruding from the side wall of the first shell, and the wing plate is provided with two connecting holes and two annular bushings tightly fitted with the inner walls of the two connecting holes. The connecting plate is detachably connected to the water pump motor via the annular bushing and external fasteners, and the connecting plate and the first shell are of an integral structure; the wing plate is a non-axisymmetric structure, and the first terminal and the annular bushing are injection molded in the first shell.

[0008] Furthermore, the second connector includes an outer shell, an inner shell arranged in the outer shell, and a second sealing ring sleeved on the inner shell. The second terminal is arranged in the outer shell and the second terminal is electrically connected with the first terminal through the wiring port. The outer shell is formed with a first installation channel for accommodating the first shell and the inner shell. The first shell has a first installation cavity for accommodating the inner shell. The outer wall of the first shell is provided with a snap-fitting piece, and the inner side of the outer shell is provided with an elastic snap-fitting rocker. The free end of the snap-fitting rocker is provided with a limiting hole for accommodating the snap-fitting piece. The snap-fitting piece of the first shell enters the limiting hole through the first installation channel and is tightly fitted with the outer shell. The second sealing ring is used to fill the assembly gap between the inner shell and the inner wall of the first shell.

[0009] Furthermore, the side wall of the outer shell is provided with an exhaust port, and the exhaust port is connected to the first installation channel, so that the air in the first installation channel is exhausted when the first terminal is inserted into the first installation channel.

[0010] Furthermore, the second connector also includes a locking piece, the two lateral sides of the locking piece are recessed inward to form an inner buckle groove, the outer shell is provided with a second installation channel for the locking piece to be plugged in and a sliding rib located in the second installation channel and slidably matched with the inner buckle groove, the first installation channel and the second installation channel are connected to each other, one end of the locking piece is provided with a protruding limiting portion and a locking portion, and the extension direction of the limiting portion and the extension direction of the locking portion are away from each other; the limiting portion of the locking piece enters the limiting hole through the second installation channel and protrudes into the first installation channel, the snap-in piece of the first shell enters the limiting hole through the first installation channel and contacts the limiting portion to link the locking portion to move up, so that the locking piece continues to move forward to cause the locking portion to stop and contact the free end of the snap rocker.

[0011] Furthermore, the outer wall of the outer shell is provided with heat dissipation fins, and the inner part of the outer shell is provided with a heat channel, which is used to guide the heat to the heat dissipation fins, increase the heat dissipation area, thereby reducing the operating temperature of the connector and reducing the performance degradation and damage of the connector caused by the heating of the shell.

[0012] Furthermore, the inner wall of the outer shell is provided with a plurality of raised fastening ribs, the extension direction of the fastening ribs is arranged parallel to the insertion direction of the first shell, and the plurality of fastening ribs are arranged around the central axis of the outer shell; the end faces of the fastening ribs are used to tightly fit with the outer wall of the first shell inserted into the first installation channel.

[0013] Furthermore, a trapezoidal boss is provided on the first shell, the trapezoidal boss is protruded from the bottom wall of the pouring groove, a mounting hole for mounting the first terminal is provided on the trapezoidal boss, a stop protrusion is provided on the first terminal, the stop protrusion is provided with an inclined guide surface extending toward the insertion direction of the first terminal, and the cross-sectional area of ​​the stop protrusion is larger than the orifice area of ​​the mounting hole so that the first terminal and the first shell have an interference fit.

[0014] Furthermore, the end face of the first sealing ring facing the external pressure is provided with a sealing lip protruding from the end face, the number of the sealing lips is multiple, and a "V"-shaped groove or a "U"-shaped groove is provided between two adjacent sealing lips.

[0015] Furthermore, the first sealing ring and the second sealing ring are provided with a nano coating, which increases the contact angle between water droplets and the coating surface (usually greater than 150 degrees), forming an effect similar to the surface of a lotus leaf. The nano coating is formed on the surface of the sealing ring by mixing, applying, thermally curing / naturally drying polyurethane, epoxy resin, graphene, antioxidant, ultraviolet absorber, etc.

[0016] Furthermore, the outer wall of the inner shell is provided with a limiting protrusion protruding from the end surface thereof, and after the second sealing ring is sleeved on the inner shell, the limiting protrusion is used to limit the movement of one side of the sealing ring.

[0017] Furthermore, the inner wall of the second sealing ring has a plurality of annular raised strips, and the annular raised strips are used for interference fit with the outer wall of the inner shell.

[0018] Furthermore, the outer wall of the first shell is provided with a stabilizing rib protruding from its end face, the end face where the stabilizing rib is located forms a symmetrical surface with the end face where the snap-fit ​​is located, the stabilizing rib is extended from its main body in the direction of insertion into the second accommodating cavity of the first shell and is provided with an inclined second guide surface, and an arc-shaped transition surface is also provided between the end face where the stabilizing rib contacts the inner wall of the outer shell and the second guide surface.

[0019] Furthermore, an inclined first guide surface is extended in the direction in which the latch slides into the first installation channel, and the extension directions of the first guide surface and the second guide surface are cross-arranged. An end of the latch away from the first guide surface is provided with a stopping inclined surface that comes into contact with the latch rocker, and the stopping inclined surface extends outward from the end surface of the first shell where it is located and extends in a direction away from the first guide surface.

[0020] Furthermore, the first shell is an asymmetric structure, one side wall of the first shell forms a sliding plane, the other side wall of the first shell forms an arc surface, and a material reduction hole is provided on one side of the first shell close to the sliding plane.

[0021] Furthermore, a first anti-foolproofing groove is provided on both lateral sides of the locking member, the opening direction of the first anti-foolproofing groove is perpendicular to the opening direction of the inner buckle groove, and a first anti-foolproofing rib is provided in the second installation channel of the outer shell for slidingly cooperating with the first anti-foolproofing groove.

[0022] Furthermore, an anti-foolproof protrusion is provided above the locking member, a second anti-foolproof sliding groove is provided in the middle of the anti-foolproof protrusion, and a second anti-foolproof rib that slidably cooperates with the second anti-foolproof sliding groove is provided on the top of the second installation channel of the outer shell.

[0023] Furthermore, a pressing portion is provided at one end of the locking member away from the locking portion, and a plurality of material reduction grooves are formed downwardly on the pressure-bearing surface of the pressing portion. The purpose of providing the material reduction grooves is to prevent the pressing portion from breaking during long-term use and to optimize the performance of the locking member.

[0024] Furthermore, an annular block is provided at one end of the outer shell, and a plurality of strip ribs are provided on the inner wall of one end of the first mounting channel close to the annular block. The strip ribs extend along the direction in which the inner shell is inserted into the first mounting channel, and the plurality of strip ribs are arranged around the central axis of the first mounting channel.

[0025] Furthermore, an elastic plate is provided between the locking portion and the fool-proof protrusion. With the elastic deformation characteristics of the elastic plate, when the buckle of the first shell continues to move forward against the limiting portion, the locking portion can move upward to make way.

[0026] Specifically, one end of the snap-on rocker and the outer shell can be set to be detachably connected, and the other end is suspended to form a cantilever beam structure. A compression spring is installed at the end of the snap-on rocker away from the annular block, and one end of the compression spring abuts against the upper wall of the second mounting channel while the other end of the snap-on rocker abuts against the upper wall of the second mounting channel.

[0027] A toggle protrusion is also provided on the end of the snap rocker away from the annular block. If it is necessary to unlock the connection between the outer shell and the first shell, the user can use the cantilever beam structure of the snap rocker and the elastic deformation of the compression spring to push the protrusion upward to make the snap rocker give way to the snap part, and then move the first shell in the opposite direction to unlock the two.

[0028] Furthermore, the inner shell is provided with a wiring port, and the external second terminal is electrically connected to the first terminal via the wiring port. A card slot is provided at one end of the inner shell, and the inner wall of the first channel of the outer shell is also provided with a limit strip that snaps into engagement with the card slot. The limit strip and the strip-shaped ribs are arranged perpendicular to each other, and the number of the limit strips is the same as the number of the strip-shaped ribs.

[0029] Furthermore, an anti-foolproof opening is provided at one end of the inner shell away from the card slot.

[0030] Furthermore, the outer wall of the inner shell is provided with a plurality of reinforcing ribs.

[0031] Furthermore, a pad strip is provided on the outer shell near the insertion end of the locking member, and when the locking member enters the second installation channel, the pad strip is located below the pressing portion of the locking member.

[0032] Furthermore, a stop strip is protruding from the inner wall of the second installation channel, and the stop strip extends from the upper wall of the second installation channel toward the pad strip; the stop strip is used to limit the locking member from continuing to move forward after being snap-fitted with the snap rocker.

[0033] Furthermore, a miniature humidity sensor is installed at the end of the inner shell or the outer shell, which is used to monitor the humidity level of the connector area in real time. A power-off protector is arranged between the second terminal and the first terminal. A relay or a similar switching element is integrated inside the power-off protector to control the on-off between the male and female terminals of the connector.

[0034] The micro humidity sensor is controlled by the intelligent control system inside the new energy vehicle. The power-off protector and the control system are connected through a relay control line to facilitate the sending of control signals. The intelligent control system realizes the interaction of digital signals with the micro humidity sensor through wireless communication technology (LoRa, etc.).

[0035] The working principle of the present invention is to achieve high pressure, waterproof and stable connection between the first connector and the second connector through precise mechanical structure design and sealing measures. The first connector is connected to the water pump motor through a connecting plate, and the gap is filled with waterproof glue in the pouring trough to enhance the waterproof performance. The second connector cooperates with the buckle seesaw of the outer shell through the buckle part and the locking mechanism of the locking part to ensure the stability and reliability of the connection. At the same time, the multi-stage sealing ring and sealing structure further enhance the overall waterproof effect.

[0036] The beneficial effects of the present invention are as follows: by filling the pouring trough with waterproof glue, a multi-stage sealing ring and a sealing lip design, excellent waterproof performance under high-pressure environment is achieved, ensuring the stable operation of the connector under harsh environment; by integrally forming a connecting plate with a non-axisymmetric structure on the first shell of the first connector, a mounting hole is opened on the connecting plate, a bushing is provided in the mounting hole, and the external threaded fastener is used to detachably install the first connector and the shell of the water pump motor through the bushing, thereby improving the applicability of the connector and facilitating subsequent maintenance; the cooperation of the snap-fit ​​part and the snap-fit ​​rocker and the double locking mechanism of the locking part not only simplifies the installation process of the first connector and the second connector, but also greatly improves the stability and safety of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the three-dimensional structure of the electrical connector of the present invention;

[0038] Figure 2 It is a schematic diagram of the structure of the electrical connector of the present invention in an exploded state;

[0039] Figure 3 It is a schematic diagram of the structure of the first connector of the present invention in an exploded state;

[0040] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A;

[0041] Figure 5 for Figure 3 A schematic diagram of the enlarged structure of part B;

[0042] Figure 6 is a side view of a first connector of the present invention;

[0043] Figure 7 is a top view of the first connector of the present invention;

[0044] Figure 8 It is a schematic diagram of the three-dimensional structure of the outer shell of the present invention after being cut;

[0045] Fig. 9 It is a three-dimensional structural schematic diagram of the locking member of the present invention;

[0046] Fig.10 It is a schematic diagram of the three-dimensional structure of the inner housing and the second sealing ring of the present invention;

[0047] Fig.11 is a cross-sectional view of the locking member of the second connector of the present invention in an unlocked state;

[0048] Fig.12 It is a cross-sectional view of the locking member of the second connector of the present invention in a locked state.

[0049] Reference numerals include:

[0050] 1. First housing; 2. Wiring port; 3. Outer housing; 4. Inner housing; 5. Second sealing ring; 6. Locking member; 7. Sealing lip; 10. First mounting cavity; 11. First terminal; 12. Connecting plate; 13. Casting groove; 14. First groove; 15. First sealing ring; 16. Wing plate; 17. Fastener; 18. Stabilizing rib; 19. Positioning angle; 30. First mounting channel; 31. Fastening rocker; 32. Exhaust port; 33. Second mounting channel; 34. Fastening rib; 35. Pad strip; 36. Annular block; 41. Limiting protrusion; 42. Slot; 43. Foolproof opening; 44. Reinforcing rib; 51. Annular protrusion strip; 60. Pressing part; 61. Inner slide groove; 62. Limiting part; 63. Locking part; 64. Step part; 65. The first foolproof slide groove; 66, foolproof protrusion; 67, elastic plate; 100, first connector; 101, sliding plane; 102, arc surface; 103, positioning rib; 111, stop convex block; 112, inclined guide surface; 131, trapezoidal boss; 132, mounting hole; 133, annular bushing; 141, protruding rib; 142, positioning notch; 151, positioning convex block; 161, connecting hole; 171, first guide surface; 172, stop inclined surface; 181, second guide surface; 191, material reduction hole; 200, second connector; 301, strip rib; 302, limit strip; 310, limit hole; 331, sliding rib; 332, first foolproof rib; 333, stop strip; 601, material reduction groove; 661, second foolproof slide groove. DETAILED DESCRIPTION

[0051] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with embodiments and drawings. The contents mentioned in the implementation modes are not intended to limit the present invention.

[0052] See also Figures 1 to 12 As shown, a high-voltage waterproof power connector for a new energy vehicle of the present invention comprises a first connector 100 and a second connector 200 plugged with the first connector 100, the first connector 100 comprises a first shell 1 and a first terminal 11 arranged on the first shell 1, the second connector 200 is provided with a wiring port 2, and the second terminal of the second connector 200 is electrically connected to the water pump motor of the new energy vehicle via the first terminal 11; a connecting plate 12 is protruding from the outer side of the first shell 1, and the first shell 1 is detachably connected to the external water pump motor via the connecting plate 12, a pouring groove 13 is provided at one end of the first shell 1 or / and one end of the connecting plate 12, the first terminal 11 penetrates the bottom wall of the pouring groove 13 and is fixedly connected to the first shell 1, and the external waterproof glue is cast in the pouring groove 13 to fill the gap between the first shell 1 and the first terminal 11.

[0053] The first housing 1 is made of high-strength, corrosion-resistant insulating material, such as nylon PA66 or polycarbonate PC, and has good insulation performance and mechanical strength, and can withstand the influence of high voltage current and external environment. The connecting plate 12 is a non-axisymmetric structure, and the connecting plate 12 and the housing of the external water pump motor are fastened and connected by M4 threaded parts, or the connecting plate 12 and the housing of the water pump motor are fixedly connected by waterproof glue.

[0054] The pouring groove 13 is located on the outside of the connecting plate 12. This external gluing method is easier to position and control, simplifying the operation process; this method also makes the amount of glue on each connector more accurate and consistent, thereby further improving the quality and reliability of the product; external gluing is relatively easier to control the distribution and appearance of the glue, making the product appearance more neat and beautiful; since the glue formed in the pouring groove 13 is located on the outside of the connecting plate 12, it is more convenient to clean the glue during maintenance; the connecting plate 12 protrudes out of the side wall of the first shell 1 and the pouring groove 13 is arranged on the outside of the connecting plate 12, so that the gluing operation space is relatively large, which can significantly improve production efficiency.

[0055] Specifically, a microporous structure is opened on the bottom wall and side wall of the pouring groove 13, and the capillary effect is used to further absorb the waterproof glue poured into the pouring groove 13. After the waterproof glue is formed and solidified in the micropores, the connection between the waterproof glue body and the side wall and bottom wall of the pouring groove 13 can be significantly increased, thereby ensuring the waterproof properties of the connector in harsh environments such as vibration and high temperature.

[0056] Specifically, the connecting plate 12 is formed with a first groove 14 in the direction of the first housing 1, and a flexible first sealing ring 15 is arranged in the first groove 14. The first groove 14 is arranged around the outer wall of the pouring groove 13, and the groove depth of the first groove 14 is greater than the groove depth of the pouring groove 13. The first sealing ring 15 is arranged on the end surface of the free end of the connecting plate 12, and the first sealing ring 15 is used to seal the gap between the connecting plate 12 and the water pump motor. The connecting plate 12 also has a positioning notch 142 connected to the first groove 14, and the outer side of the first sealing ring 15 is provided with a positioning protrusion 151 that cooperates with the positioning notch 142 and clamps. During assembly, this structure facilitates the positioning and installation of the first sealing ring 15.

[0057] The inner wall of the first groove 14 of the first housing 1 is also provided with a plurality of raised ribs 141 protruding from the end face of the inner wall thereof. The provision of the raised ribs 141 can further compress the accommodation space of the first groove 14, thereby making the sleeve connection of the first seal more stable. The provision of the groove depth of the first groove 14 being greater than the groove depth of the pouring groove 13 can prevent the waterproof glue from overflowing the connecting plate 12 during the gluing process. Specifically, the connecting plate 12 has a wing plate 16 protruding from the side wall of the first housing 1, the wing plate 16 is a parallelogram structure, two connecting holes 161 and two annular M4 bushings 133 tightly matched with the inner walls of the two connecting holes 161 are provided on the wing plate 16, the two connecting holes 161 are respectively located at two diagonal positions of the wing plate 16, the connecting plate 12 is detachably connected to the water pump motor via the M4 bushing 133 and the M4 screw, the connecting plate 12 is an integral structure with the first housing 1, and the first terminal 11 and the annular bushing 133 are injection molded in the first housing. A relatively stable mechanical connection between the connecting plate 12 and the water pump motor is achieved by screws, and the screws can ensure the tight connection of the various components even when the motor is running at high speed; compared with the integrated setting of the motor housing and the power connector, this detachable connection is more maintainable; and the use of screws to achieve detachable connection makes it more widely applicable, low cost and simple to operate.

[0058] The first terminal 11 made of metal is tightly combined with the first housing 1 made of plastic during the injection molding process to form a whole, thereby significantly improving the overall strength and durability of the connector. This design allows the connector to maintain stable connection performance even in harsh working environments.

[0059] Specifically, the second connector 200 includes an outer shell 3, an inner shell 4 arranged in the outer shell 3, and a second sealing ring 5 sleeved on the inner shell 4. The inner shell 4 is provided with a wiring port 2, and the inner wall of the wiring port 2 is provided with an inclined step. The second terminal can quickly pass through the wiring port under the guidance of the inclined step and contact with the first terminal 11 to achieve electrical conduction; the second terminal is arranged in the outer shell 3 (the second terminal is connected to the external power pin, control circuit, etc.), and a first installation channel 30 for accommodating the first shell 1 and the inner shell 4 is formed between the outer shell 3 and the inner shell 4, and the first installation cavity 10 is used to accommodate the inner shell 4 of the second connector 200.

[0060] Specifically, the outer wall of the outer shell 3 is provided with heat dissipation fins, and the inner part of the outer shell 3 is provided with a heat channel, which is used to guide heat to the heat dissipation fins, increase the heat dissipation area, thereby reducing the operating temperature of the connector and reducing the performance degradation and damage of the connector caused by the heating of the shell.

[0061] The outer wall of the first shell 1 is provided with a snap-fitting piece 17, and the inner side of the outer shell 3 is provided with an elastic snap-fitting seesaw 31. The free end of the snap-fitting seesaw 31 is provided with a limiting hole 310 for accommodating the snap-fitting piece 17. The snap-fitting piece 17 of the first shell 1 enters the limiting hole 310 through the first installation channel 30 and is tightly fitted with the outer shell 3. The second sealing ring 5 is sleeved on the outer wall of the inner shell 4. When the first connector 100 is inserted into the second connector 200, the second sealing ring 5 is compressed and filled in the assembly gap between the inner shell 4 and the inner wall of the first shell 1 to form an effective waterproof barrier. The first sealing ring 15 and the second sealing ring 5 are both made of highly elastic and aging-resistant silicone rubber or EPDM rubber.

[0062] Specifically, the first sealing ring 15 and the second sealing ring 5 are provided with a nano coating, which increases the contact angle between the water droplet and the coating surface (usually greater than 150 degrees), forming an effect similar to the surface of a lotus leaf. The nano coating is formed on the surface of the sealing ring by mixing, applying, thermal curing / natural drying of polyurethane, epoxy resin, graphene, antioxidant, ultraviolet absorber, etc. The setting of these nano coatings is based on its hydrophobic effect, ultraviolet absorption and shielding, chemical stability and thermal stability to achieve excellent water resistance and anti-aging performance of the waterproof ring; thereby improving the service life of the connector.

[0063] Specifically, the side wall of the outer shell 3 is provided with an exhaust port 32 connected to the first installation channel 30. The addition of the exhaust port 32 allows the air in the first installation channel 30 to be quickly discharged during the insertion of the first connector 100 into the second connector 200, reducing the poor sealing problem caused by air compression, thereby improving the overall sealing performance of the connector. In addition, the existence of the exhaust port 32 makes the insertion of the first connector 100 smoother, reduces the plugging and unplugging force caused by air resistance, and improves the user experience.

[0064] Specifically, the second connector 200 further includes a locking member 6, and the two lateral sides of the locking member 6 are inwardly recessed to form an inner buckle slide groove 61, the outer shell 3 is provided with a second installation channel 33 for the locking member 6 to be inserted, and a sliding rib 331 located in the second installation channel 33 and slidingly matched with the inner buckle slide groove 61, the surface of the sliding rib 331 is provided with a lubricating coating, the first installation channel 30 and the second installation channel 33 are connected to each other, and one end of the locking member 6 is provided with a protruding limiting portion 62 and a locking portion 63, and the extension direction of the limiting portion 62 and the extension direction of the locking portion 63 are away from each other;

[0065] A step portion 64 is provided between the locking portion 63 and the limit locking portion 63. During the insertion process of the second mounting channel 33, the limit portion 62 thereof first enters the limit hole 310 of the outer shell 3. Then, as the locking member 6 is further advanced, the limit portion 62 protrudes out of the limit hole 310 and partially protrudes into the first mounting channel 30. At this time, the locking portion 63 is partially accommodated in the limit hole 310 and is in conflict with the buckle rocker 31 and is restricted from moving. Subsequently, the buckle 17 of the first shell 1 enters the limit hole 310 through the first mounting channel 30 and is in conflict with the limit portion 62 to link the locking portion 63 to move upward. After the locking portion 63 moves out of the limit hole 310, the locking member 6 can continue to move forward, so that the free end of the buckle rocker 31 accommodated in the step portion 64, that is, the locking portion 63 is locked between the buckle rocker 31 and the top wall of the second mounting channel 33 and is restricted from moving up and down to achieve secondary locking.

[0066] The following describes the process of achieving secondary locking in combination with the structure of the locking portion 63 and the outer shell 3: in the initial state, the locking member 6 is not inserted into the second installation cavity, and the latch 17 of the first shell 1 has not entered the limiting hole 310; in the insertion stage, the locking member 6 is inserted into the second installation channel 33, and the limiting portion 62 first enters the limiting hole 310, and as the locking member 6 is further pushed forward, part of the limiting portion 62 protrudes into the first installation channel 30. At this time, the locking portion 63 and the buckle rocker 31 are in conflict with each other and are restricted from moving; in the locking stage, the buckle 17 of the first shell 1 enters the limiting hole 310 through the first installation channel 30, and conflicts with the limiting portion 62 to move the locking portion 63 upward. After the locking portion 63 moves out of the limiting hole 310, the locking member 6 can continue to move forward, and then the step portion 64 accommodates the free end of the buckle rocker 31 (the bottom wall of the locking portion 63 and the top of the free end of the buckle rocker 31 block and conflict with each other) to achieve secondary locking. This secondary locking mechanism ensures that the power connector can also ensure stable electrical connection in harsh environments and prevent loosening and falling off. Specifically, the inner wall of the outer shell 3 is provided with a plurality of raised fastening ribs 34, the extension direction of the fastening ribs 34 is arranged parallel to the insertion direction of the first shell 1, and the plurality of fastening ribs 34 are arranged around the central axis of the outer shell 3; the end face of the fastening rib 34 is used to tightly fit with the outer wall of the first shell 1 inserted into the first installation channel 30. The plurality of fastening ribs 34 are evenly distributed around the central axis of the outer shell 3, forming a ring-shaped or spiral structure. This layout not only improves the overall strength of the outer shell 3, but also helps to disperse the insertion force and reduce stress concentration.

[0067] The tightening effect of the fastening rib 34 helps to reduce the gap between the first housing 1 and the outer housing 3, thereby improving the sealing performance of the connector. In actual use, the fastening rib 34 can be made of elastic material so that it can produce a certain elastic deformation when subjected to external force. In this way, the impact force and vibration energy during the insertion process can be absorbed to a certain extent, protecting the connector and related equipment from damage.

[0068] Specifically, a trapezoidal boss 131 is provided on the first shell 1, and the trapezoidal boss 131 is protruded from the bottom wall of the pouring groove 13. A mounting hole 132 for mounting the first terminal 11 is provided on the trapezoidal boss 131. The design of the trapezoidal boss 131 makes it have a certain inclination in the height direction, which helps to guide the correct insertion of the first terminal 11 and increase the friction during the insertion process.

[0069] Specifically, a stop protrusion 111 is provided on the first terminal 11, and an inclined guide surface 112 is extended on the stop protrusion 111 toward the insertion direction of the first terminal 11. The cross-sectional area of ​​the stop protrusion 111 is larger than the aperture area of ​​the mounting hole 132. The design of the inclined guide surface 112 enables the first terminal 11 to be gradually compressed and smoothly pass through the mounting hole 132 during the insertion process. Once the first terminal 11 is fully inserted, the stop protrusion 111 will be stuck in the mounting hole 132 because its cross-sectional area is larger than the aperture area of ​​the mounting hole 132, and the interference fit is achieved to further improve the overall stability of the connector. This design can effectively prevent the first terminal 11 from loosening or falling off during use. In addition, the design of the inclined guide surface 112 makes the insertion process of the first terminal 11 smoother and reduces the risk of damage caused by excessive insertion force.

[0070] Specifically, the end face of the first sealing ring 15 facing the external pressure is provided with a sealing lip 7 protruding from the end face, and the number of the sealing lips 7 is multiple, and a "V"-shaped groove or a "U"-shaped groove is provided between two adjacent sealing lips 7. The design of the sealing lip 7 and the "V"-shaped groove or the "U"-shaped groove enhances the sealing effect of the sealing ring, and can effectively prevent liquid from entering the connector and affecting the normal operation of the connector.

[0071] Specifically, the outer wall of the inner housing 4 is provided with a limiting protrusion 41 protruding from its end surface. After the second sealing ring 5 is sleeved on the inner housing 4, the limiting protrusion 41 is used to limit the movement of one side of the sealing ring. During the assembly process, the second sealing ring 5 should be sleeved on the inner housing 4 first, and it is ensured that the annular protrusion strip 51 is tightly fitted with the outer wall of the inner housing 4. Then, the limiting protrusion 41 limits the movement of one side of the sealing ring to complete the positioning of the sealing ring.

[0072] Specifically, the inner wall of the second sealing ring 5 has a plurality of annular raised strips 51 , that is, the annular raised strips 51 are compressed and closely fit on the outer wall of the inner shell 4 during the assembly process, thereby providing additional sealing force and stability.

[0073] Specifically, the outer wall of the first shell 1 is provided with a stabilizing rib 18 protruding from its end face, and the end face where the stabilizing rib 18 is located forms a symmetrical plane with the end face where the snap member 17 is located. The stabilizing rib 18 extends from its main body in the direction of inserting the first shell 1 into the second accommodating cavity and is provided with an inclined second guide surface 181. An arc-shaped transition surface is also provided between the end face where the stabilizing rib 18 contacts the inner wall of the outer shell 3 and the second guide surface 181.

[0074] When the first shell 1 is inserted into the second accommodating cavity of the outer shell 3, the stabilizing rib 18 first contacts the entrance edge of the second accommodating cavity of the outer shell 3 through its second guide surface 181, and gradually slides into the inner wall of the outer shell 3 as the first shell 1 is further inserted. In this process, the arc-shaped transition surface helps to reduce the friction and wear between the stabilizing rib 18 and the inner wall of the outer shell 3, while ensuring that the stabilizing rib 18 can smoothly transition to a state of full contact with the inner wall of the outer shell 3.

[0075] The design of the stabilizing rib 18 provides additional support and stability for the connector, helping to reduce looseness or damage caused by vibration or impact. The design of the second guide surface 181 and the arc-shaped transition surface enables the stabilizing rib 18 to slide smoothly into the inner wall of the outer shell 3, reducing assembly resistance and time and improving assembly efficiency.

[0076] Specifically, an inclined first guide surface 171 is extended in the direction in which the latch 17 slides into the second accommodating cavity, and the extension directions of the first guide surface 171 and the second guide surface 181 are cross-arranged. This cross-design helps guide the latch 17 and the stabilizing rib 18 to slide into the outer shell 3 along different paths respectively during the assembly process, avoiding mutual interference and improving the accuracy and efficiency of assembly. The end of the latch 17 away from the first guide surface 171 is provided with a blocking inclined surface 172 that blocks and contacts the latch rocker 31. The blocking inclined surface 172 extends outward from the end surface of the first shell 1 where it is located and extends in the direction away from the first guide surface 171. This design enables the blocking inclined surface 172 to gradually contact the latch rocker 31 during the sliding process of the latch 17, and finally achieve a stable blocking effect.

[0077] Specifically, the first shell 1 is an asymmetric structure, two locating angles 19 are provided at both ends of one side wall of the first shell 1, a sliding plane 101 is formed between the two locating angles 19, and another side wall of the first shell 1 forms an arc surface 102, and a material reduction hole 191 is provided on the locating angle 19. This sub-symmetric design can simplify the assembly of the first shell 1, and the design of the material reduction hole 191 enables the side wall of the first shell 1 to produce elastic deformation when it is inserted into the outer shell 3 and tightly fits with the outer shell 3, thereby preventing the first shell 1 from breaking after multiple plugging and unplugging.

[0078] Specifically, first foolproofing grooves 65 are further provided on both lateral sides of the locking member 6, the opening direction of the first foolproofing grooves 65 is perpendicular to the opening direction of the inner buckle grooves 61, and first foolproofing convex ribs 332 are provided in the second installation channel 33 of the outer shell 3 to slide with the first foolproofing grooves 65. This design is intended to prevent the locking member 6 from sliding in the wrong direction during assembly, thereby ensuring the correct assembly position.

[0079] Specifically, a foolproof protrusion 66 is provided above the locking member 6, a second foolproof slide groove 661 is provided in the middle of the foolproof protrusion 66, and a second foolproof convex rib (not shown in the figure) is provided at the top of the second installation channel 33 of the outer shell 3 to slide with the second foolproof slide groove 661. The second foolproof convex rib slides with the second foolproof slide groove 661, and at the same time, when the locking portion 63 of the locking member 6 is pushed onto the surface of the buckle rocker 31 in the limiting hole 310, the second foolproof rib limits the movement of the locking portion 63, thereby achieving a secondary locking effect.

[0080] Specifically, a pressing portion 60 is provided at one end of the locking member 6 away from the locking portion 63, and a plurality of material reduction grooves 601 are formed on the pressure-bearing surface of the pressing portion 60, which are concave downwards. The material reduction grooves 601 are provided to prevent the pressing portion 60 from breaking during long-term use and optimize the performance of the locking member 6. A pad strip 35 is provided at the insertion end of the outer shell 3 near the locking member 6. When the locking member 6 enters the second installation channel 33, the pad strip 35 is located below the pressing portion 60 of the locking member 6. The pad strip 35 can pad the pressing portion 60 when it is pressed, preventing the pressing portion 60 from breaking through the damage limit and improving the service life.

[0081] Specifically, an elastic plate 67 is provided between the locking portion 63 and the foolproof protrusion 66. With the elastic deformation characteristics of the elastic plate 67, when the buckle 17 of the first shell 1 continues to move forward against the limiting portion 62, the locking portion 63 can move upward to make way.

[0082] Specifically, one end of the buckle rocker 31 and the outer shell 3 can be detachably connected, and the other end thereof is suspended to form a cantilever beam structure, and the setting of the limiting hole 310 forms an elastic interlocking mechanism with the buckle 17. A compression spring (not shown in the figure) is installed at one end of the buckle rocker 31 away from the annular block 36, and one end of the compression spring abuts against the buckle rocker 31 and the other end abuts against the upper wall of the second installation channel 33.

[0083] The end of the buckle rocker 31 away from the annular block 36 is also provided with a toggle protrusion (not shown in the figure). If it is necessary to unlock the connection between the outer shell 3 and the first shell 1, the user can use the cantilever beam structure of the buckle rocker 31 and the elastic deformation of the compression spring to push the protrusion upward to make the buckle rocker 31 give way to the buckle 17, and then move the first shell 1 in the opposite direction to unlock the two. The addition of the compression spring improves the durability and fatigue resistance of the buckle rocker 31, and can maintain a stable connection and unlocking effect even under frequent use. The detachable connection of the buckle rocker 31 also facilitates its maintenance and replacement. It can be quickly replaced and maintained without replacing the entire outer shell 3, reducing maintenance costs and time.

[0084] Specifically, an annular block 36 is provided at one end of the outer shell 3, and a plurality of strip-shaped convex ribs 301 are provided on the inner wall of one end of the first installation channel 30 close to the annular block 36. The strip-shaped convex ribs 301 are extended along the direction in which the inner shell 4 is inserted into the first installation channel 30, and the plurality of strip-shaped convex ribs 301 are arranged around the central axis of the first installation channel 30. The annular block 36 can play a levering effect to facilitate the user's hand to leverage and cooperate with the pressing portion 60 of the locking member 6. On the other hand, the annular block 36 can increase the structural strength of the outer shell 3. The strip-shaped convex ribs 301 can achieve an interference fit between the outer wall of the first shell 1 and the inner wall of the outer shell 3, further preventing the connector from entering liquid during use.

[0085] Specifically, the inner shell 4 is provided with a wiring port 2, the second terminal is electrically connected to the first terminal 11 via the wiring port 2, a card slot 42 is provided at one end of the inner shell 4, and the inner wall of the first installation channel 30 of the outer shell 3 is also provided with a limit strip 302 that snaps with the card slot 42, the limit strip 302 and the strip-shaped convex rib 301 are arranged perpendicular to each other, and the number of the limit strips 302 is the same as the number of the strip-shaped convex rib 301. The inner wall of the first channel of the outer shell 3 is provided with a limit strip 302 that snaps with the card slot 42. The number of these limit strips 302 is the same as the number of the strip-shaped convex ribs 301 on the inner shell 4, and they are arranged perpendicular to each other. This design not only ensures the stable position of the inner shell 4 in the outer shell 3, but also enhances the strength and rigidity of the overall structure through the vertically staggered layout.

[0086] Specifically, a miniature humidity sensor (not shown in the figure) is installed at the end of the inner shell 4 or the outer shell 3, which is used to monitor the humidity level in the connector area in real time, and a power-off protector is arranged between the second terminal and the first terminal. A relay or a similar switching element is integrated inside the power-off protector to control the on-off between the male and female terminals of the connector.

[0087] The micro humidity sensor is controlled by the intelligent control system inside the new energy vehicle. The power-off protector and the control system are connected through a relay control line to facilitate the transmission of control signals. The system realizes the interaction of digital signals with the micro humidity sensor through wireless communication technology (LoRa, ZigBee, etc.). The built-in processor of the system is used to receive and process the signals monitored by the micro humidity sensor, and determine whether there is excessive humidity or water leakage at the terminal of the connector according to the preset humidity threshold; if there is excessive humidity, an early warning signal is sent immediately;

[0088] If there is a water leak, a command is sent to the power-off protector, which quickly cuts off the electrical connection between the first terminal and the second terminal in the connector after receiving the command, thereby preventing the current from passing through the terminals that may be damaged or wet, avoiding safety hazards such as short circuits and electric shocks. This design allows the control system to detect potential faults in advance, avoid serious damage to the water pump and unexpected shutdown, improve the safety and reliability of the vehicle, and ensure the safety of drivers and passengers.

[0089] Specifically, an anti-foolproof opening 43 is provided at one end of the inner housing 4 away from the slot 42, and a positioning rib 103 is provided in the first installation cavity 10 of the first housing 1 to slide with the anti-foolproof opening 43. The cooperation of the two realizes convenient assembly of the inner housing 4.

[0090] Specifically, the outer wall of the inner shell 4 is provided with a plurality of reinforcing ribs 44. The provision of the reinforcing ribs 44 improves the structural strength of the inner shell 4 and the durability of the product.

[0091] Specifically, a stop strip 333 is protruding from the inner wall of the second installation channel 33, and the stop strip 333 extends from the upper wall of the second installation channel 33 toward the pad strip 35; the stop strip 333 is used to limit the locking member 6 from continuing to move forward after being snap-fitted with the snap rocker 31.

[0092] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A high-voltage waterproof power connector for new energy vehicles, characterized in that: The invention comprises a first connector (100) and a second connector (200) pluggably mated with the first connector, the first connector comprising a first housing (1) and a first terminal (11) arranged on the first housing, the second terminal of the second connector being electrically connected to a water pump motor via the first terminal; a connecting plate (12) is protruding from the outer side of the first housing, the first housing is detachably connected to an external water pump motor via the connecting plate (12), a pouring groove (13) is recessed at one end of the first housing, the first terminal penetrates the bottom wall of the pouring groove (13) and is fixedly connected to the first housing, and external waterproof glue is cast and molded in the pouring groove (13) to fill the gap between the first housing and the first terminal; One end of the connecting plate (12) is further provided with a first groove (14), a flexible first sealing ring (15) is provided in the first groove (14), the first groove (14) is provided around the pouring groove (13), the groove depth of the first groove (14) is greater than the groove depth of the pouring groove (13), and the first sealing ring (15) is used to seal the gap between the connecting plate (12) and the water pump motor; The second connector comprises an outer shell (3), an inner shell (4) arranged inside the outer shell (3), and a second sealing ring (5) sleeved on the inner shell (4); the inner shell (4) is provided with a wiring port (2); a second terminal is arranged inside the outer shell; the second terminal passes through the wiring port (2) and is electrically connected to the first terminal; the outer shell (3) has a first installation channel (30) for accommodating and guiding the inner shell (4) and the first shell (1) to be inserted; The first shell has a first installation cavity (10) for accommodating the inner shell (4); a snap-fitting piece (17) is provided on the outer wall of the first shell; an elastic snap-fitting rocker (31) is provided on the inner side of the outer shell (3); a limiting hole (310) for accommodating the snap-fitting piece is provided at the free end of the snap-fitting rocker (31); the snap-fitting piece of the first shell (1) enters the limiting hole (310) through the first installation channel (30) and is snap-fitted with the outer shell (3); and the second sealing ring (5) is used to fill the assembly gap between the inner shell (4) and the inner wall of the first shell; The second connector further comprises a locking member (6), the two lateral sides of the locking member being recessed inwardly to form an inner buckle groove (61), the outer shell (3) being provided with a second mounting channel (33) for the locking member to be inserted into, and a sliding rib (331) located in the second mounting channel (33) and slidably matched with the inner buckle groove (61), the first mounting channel (30) and the second mounting channel (33) being communicated with each other, one end of the locking member being provided with a protruding limiting portion (62) and a locking portion (63), the extension direction of the limiting portion and the extension direction of the locking portion being away from each other; the limiting portion of the locking member enters the limiting hole (310) via the second mounting channel (33) and protrudes into the first mounting channel (30).

2. The high-voltage waterproof power connector for new energy vehicles according to claim 1 is characterized in that: The inner wall of the outer shell (3) is provided with a plurality of strip-shaped fastening ribs (34), the extension direction of the fastening ribs (34) being arranged parallel to the direction in which the first shell (1) is inserted into the outer shell (3), the plurality of fastening ribs (34) being arranged around the central axis of the outer shell (3), the end faces of the fastening ribs (34) being used to tightly fit with the outer wall of the first shell (1) inserted into the first installation channel (30).

3. The high-voltage waterproof power connector for new energy vehicles according to claim 1, characterized in that: A trapezoidal boss (131) is provided in the pouring groove (13) and is in contact with the first terminal (11). The trapezoidal boss (131) is formed by protruding from the bottom wall of the pouring groove (13). A mounting hole (132) for mounting the first terminal (11) is provided on the trapezoidal boss (131). The first terminal (11) is provided with a stopper protrusion (111). The stopper protrusion (111) is provided with an inclined guide surface (112) extending in the insertion direction of the first terminal (11). The cross-sectional area of ​​the stopper protrusion (111) is larger than the opening area of ​​the mounting hole (132) so that the first terminal (11) and the first housing (1) are interference-fitted.

4. The high-voltage waterproof power connector for new energy vehicles according to claim 1, characterized in that: The outer wall of the first shell (1) is provided with a stabilizing rib (18) protruding from its end surface, the end surface where the stabilizing rib (18) is located and the end surface where the buckle (17) is located form a symmetrical surface, and the stabilizing rib (18) is provided with an inclined second guide surface (181) extending from its main body in the direction in which the first shell (1) is inserted into the first installation channel (30).

5. The high-voltage waterproof power connector for new energy vehicles according to claim 4, characterized in that: An inclined first guide surface (171) is provided extending in the direction in which the latch (17) slides into the second accommodating cavity. The first guide surface (171) and the second guide surface (181) are arranged in a cross-direction. An end of the latch (17) away from the first guide surface (171) is provided with a stop inclined surface (172) which stops and abuts against the latch rocker (31). The stop inclined surface (172) extends outwardly from the end surface of the first shell (1) where it is located and extends in a direction away from the first guide surface (171).

Images