Bidirectional waterproof wire holder with shielding shell and manufacturing process of bidirectional waterproof wire holder

Abstract

The invention discloses a bidirectional waterproof wire holder with a shielding shell and a manufacturing process thereof. The bidirectional waterproof wire holder with the shielding shell comprises a wire holder shell, and a mounting seat is arranged at the lower end of the wire holder shell; the plurality of terminals are arranged in the wire holder shell in an up-and-down penetrating manner; the shielding shell comprises a main body part and an annular convex part which is formed by extending upwards from the middle part of the main body part, the main body part is sleeved outside the mounting seat, and the annular convex part is sleeved outside the middle part of the wire holder shell; the top surface of the main body part and the side surface of the annular protruding part are respectively provided with a contact elastic sheet which is used for contacting with a wiring part of an electric control end. The problems that in a traditional built-in shielding case scheme, the manufacturing process is complex, the machining difficulty is large, the cost is high, the efficiency is low, and EMC cannot be effectively solved are effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a bidirectional waterproof terminal block with a shielding shell and a manufacturing process thereof. Background Art

[0002] Bidirectional waterproof shielded connectors are typically installed in automotive motors, connecting the motor to the electronic control. A Chinese utility model patent with authorization publication number CN213073464U discloses a bidirectional waterproof shielded connector comprising a housing, terminals, a shielding cover, a first sealing ring, and a second sealing ring. The housing's upper exterior is provided with a first annular groove, within which the first sealing ring is sleeved. The housing's lower exterior is provided with a mounting flange, with a second annular groove provided on the lower end surface of the mounting flange, within which the second sealing ring is seated. The housing's upper exterior is provided with a boss, which has three through-holes for terminals, each of which is seated in a corresponding terminal hole, with the terminals extending from both ends. The housing's exterior is provided with an annular protrusion, forming a mounting cavity between the annular protrusion and the boss. The shielding cover is positioned within the mounting cavity and sleeved over the exterior of the boss. This bidirectional waterproof shielded connector addresses signal interference from the electronic control terminal by adding an inner shielding cover within the housing, thereby enhancing signal transmission stability.

[0003] However, for the above-mentioned bidirectional waterproof shielded connector in which an inner shielding cover is added inside the shell, at the manufacturing process level, the inner shielding cover needs to be precisely installed in the specific installation cavity of the shell, which requires extremely high precision of the shell mold, and the structural design of the annular protrusion, boss and multi-layer sealing ring increases the complexity and processing difficulty of the mold, resulting in a long mold manufacturing cycle and low yield rate; in terms of production cost, the mold development cost brought about by the complex structure, the labor cost required for multi-component assembly, and the additional loss cost caused by the low yield rate have caused the cost of a single product to rise significantly; in terms of production efficiency, the multi-component assembly process is cumbersome, especially the precise assembly link of the inner shielding cover and the shell, resulting in low production efficiency; in terms of technical effect, this solution only responds to signal interference by adding an inner shielding cover, lacks a systematic electromagnetic compatibility (EMC) design, cannot effectively isolate the high-frequency electromagnetic noise generated during motor operation, and is difficult to meet the increasingly stringent EMC standards of new energy vehicles. Summary of the Invention

[0004] In order to overcome the problems of complex manufacturing process, difficult processing, high cost, low efficiency and ineffective EMC solution in the prior art bidirectional waterproof shielded connector, the present invention provides a bidirectional waterproof terminal block with a shielding shell and its manufacturing process.

[0005] The technical solution of the present invention is as follows: In a first aspect, the present invention provides a bidirectional waterproof terminal block with a shielding shell, comprising: A wiring block housing, wherein a mounting base is provided at the lower end of the wiring block housing; A plurality of terminals are vertically inserted into the terminal block housing; The shielding shell includes a main body and an annular protrusion extending upward from the middle of the main body, the main body is sleeved outside the mounting seat, and the annular protrusion is sleeved outside the middle of the terminal block shell, and the top surface of the main body and the side surface of the annular protrusion are both provided with contact springs for contacting the wiring part of the electric control terminal.

[0006] As a preferred solution of the present invention, a plurality of contact springs are provided on the top surface of the main body along the periphery of the annular protrusion, and a plurality of contact springs are provided around the side surfaces of the annular protrusion.

[0007] As a preferred solution of the present invention, a plurality of hanging platforms that are engaged with the mounting seat are provided around the bottom of the side wall of the main body.

[0008] As a preferred solution of the present invention, a plurality of engaging grooves for engaging with the hanging platform are provided on the four edges around the bottom of the mounting seat.

[0009] As a preferred solution of the present invention, the bottom of the hanging platform is provided with contact protrusions for contacting the motor.

[0010] As a preferred solution of the present invention, a bushing is riveted onto the mounting seat, and an opening corresponding to the position of the bushing is opened on the top of the main body.

[0011] As a preferred solution of the present invention, the shielding shell is made of SUS316L stainless steel, and the thickness of the shielding shell is 0.4 mm.

[0012] As a preferred solution of the present invention, the terminal is a copper busbar, and nuts are riveted on both the upper and lower ends of the terminal.

[0013] As a preferred embodiment of the present invention, a first sealing ring installation groove is provided on the outer wall of the upper end of the terminal block housing, a first sealing ring is sleeved in the first sealing ring installation groove, and fixing glue is provided between the first sealing ring and the first sealing ring installation groove; A second sealing ring installation groove is provided at the bottom of the installation seat, and a second sealing ring is sleeved in the second sealing ring installation groove.

[0014] As a preferred solution of the present invention, the upper ends of all the terminals are wrapped by a first primary plastic wrapping body, the lower ends of all the terminals are wrapped by a second primary plastic wrapping body, and all the terminals, the first primary plastic wrapping body, the second primary plastic wrapping body and the terminal block housing are secondary plastic wrapping body.

[0015] As a preferred solution of the present invention, a plurality of glue injection ports are provided around the middle side wall of the terminal block housing, and the glue injection ports are located between the first primary plastic package and the second primary plastic package. Sealant glue is poured into the glue injection ports to seal the gap between the terminal and the terminal block housing.

[0016] In a second aspect, the present invention provides a process for manufacturing a bidirectional waterproof terminal block with a shielding shell, comprising the following steps: Step S1, making terminals; Step S2, performing a primary overmolding on the upper and lower portions of all the terminals to form a first primary overmolded body and a second primary overmolded body; Step S3, performing secondary overmolding on all the terminals, the first primary overmolding body, and the second primary overmolding body to form a terminal block housing; Step S4, riveting a bushing on the mounting seat of the terminal block housing; Step S5, pouring sealing glue into the glue injection port of the terminal block housing to seal the gap between the terminal and the terminal block housing; Step S6, assembling a shielding shell on the terminal block shell; Step S7: Apply fixing glue to the first sealing ring installation groove on the outer wall of the upper end of the terminal block housing, and install the first sealing ring in the first sealing ring installation groove; Step S8: Install the second sealing ring in the second sealing ring installation groove at the bottom of the installation seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. By assembling a shielding shell on the terminal block shell, the internal terminals are shielded, reducing the impact of external electromagnetic interference on internal signal transmission, thereby solving the signal interference at the electronic control end and achieving the effect of enhancing the stability of signal transmission; 2. By providing contact springs on the top surface of the main body of the terminal block housing and the side surface of the annular protrusion, when the terminal block is connected to the wiring part of the electric control terminal, the contact springs will contact the wiring part of the electric control terminal, which not only helps to solve the EMC problem, but also increases the reliability of the connection with the electric control terminal; 3. By setting a hanging platform on the shielding shell that is connected to the mounting seat, the problem of loosening and falling off of the shielding shell after assembly is avoided, and the reliability and stability of the structure are improved. At the same time, a contact bump that contacts the motor is set at the bottom of the hanging platform, so that the shielding shell can more efficiently guide electromagnetic interference into the ground terminal of the motor housing, improve the overall electromagnetic shielding effectiveness, and further improve EMC problems. 4. By adding a one-time plastic coating for all terminals, the deformation / appearance shrinkage / dimensional instability problems caused by uneven plastic coating thickness can be improved. At the same time, the plastic coating mold structure is simplified, and there is no need to set up a complex inner shielding cover installation cavity, which reduces assembly errors and reduces dependence on the accuracy of the housing mold, thus reducing costs and improving production efficiency. 5. Through the standardized process of "terminal processing → primary overmolding → secondary overmolding → riveting bushing → glue injection and sealing → shield shell assembly → sealing ring assembly", the overmolding process, waterproof grade (IPX8) and EMC performance are systematically optimized, solving the problems of complex manufacturing process, difficult processing, high cost, low efficiency and inability to effectively solve EMC problems in traditional built-in shielding cover solutions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 1 This is a schematic structural diagram of a bidirectional waterproof terminal block with a shielding shell according to an embodiment of the present invention; Figure 2 A schematic structural diagram of a bidirectional waterproof terminal block with a shielding shell in another perspective according to an embodiment of the present invention; Figure 3 An exploded view of a bidirectional waterproof terminal block with a shielding shell according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a wiring socket housing in one embodiment of the present invention; Figure 5 Schematic diagram of the structure of a shielding shell in one embodiment of the present invention.

[0020] In the figure, 1. Terminal block housing; 11. Mounting seat; 111. Snap-fit groove; 112. Bushing; 113. Second sealing ring mounting groove; 12. First sealing ring mounting groove; 13. Glue injection port; 2. Terminal; 21. Nut; 3. Shielding shell; 31. Main body; 311. Opening; 32. Annular raised portion; 33. Contact spring; 34. Hanging platform; 35. Contact bump; 4. First sealing ring; 5. Second sealing ring; 6. First primary plastic package; 7. Second primary plastic package. DETAILED DESCRIPTION

[0021] To make the technical problems, technical solutions, and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. It should also be noted that the embodiments described below are intended only to illustrate the present invention and are not intended to limit the present invention.

[0022] It should be noted that the terms "installed," "set," "connected," "fixed," etc. should be understood in a broad sense. For example, they can mean fixed connection, detachable connection, or integration; they can mean mechanical connection or electrical connection; they can mean direct connection or indirect connection through an intermediate medium; they can mean internal communication between two elements or interaction between two elements, unless otherwise clearly defined. The orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art, or the orientation or position relationship in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting this application. The terms "first" and "second" are only used for the convenience of description and should not be understood to indicate or imply relative importance or implicitly indicate the number of technical features. "Several" means one or more, unless otherwise clearly defined.

[0023] See also Figures 1 to 5 This embodiment provides a bidirectional waterproof terminal block with a shielding shell, which is installed in a motor to connect the motor and the electronic control. The bidirectional waterproof terminal block with a shielding shell includes a terminal block shell 1, multiple terminals 2, and a shielding shell 3. The lower end of the terminal block shell 1 is provided with a mounting seat 11, which is used to fix to the motor; the multiple terminals 2 are arranged in the terminal block shell 1 from top to bottom; the shielding shell 3 includes a main body 31 and an annular protrusion 32 extending upward from the middle of the main body 31. The main body 31 is sleeved on the outside of the mounting seat 11, and the annular protrusion 32 is sleeved on the outside of the middle of the terminal block shell 1, thereby shielding the internal terminals 2, reducing the influence of external electromagnetic interference on internal signal transmission, solving the signal interference at the electronic control end, and achieving the effect of enhancing the stability of signal transmission. Among them, a number of contact springs 33 are provided on the top surface of the main body 31 along the four sides of the annular protrusion 32, and a number of contact springs 33 are also provided around the side surfaces of the annular protrusion 32. When the terminal block is connected to the wiring part of the electric control end, the contact springs 33 will contact the wiring part of the electric control end, which not only helps to solve the EMC problem, but also increases the reliability of the connection with the electric control end.

[0024] See also Figure 2 、 Figure 4 、 Figure 5 In this embodiment, the bottom of the sidewalls of the main body 31 are provided with a plurality of mounting platforms 34 that engage with the mounting base 11. The bottom edge of the mounting base 11 is provided with a plurality of engaging grooves 111 that engage with the mounting platforms 34. The provision of the mounting platforms 34 and engaging grooves 111 prevents the shielding shell 3 from loosening or falling off after assembly, thereby improving the reliability and stability of the structure.

[0025] Furthermore, the bottom of the mounting bracket 34 is provided with contact bumps 35 for contacting the motor. When the bidirectional waterproof terminal block with shielding housing is installed on the motor, the contact bumps 35 on the bottom of the mounting bracket 34 will contact the motor, forming a low-impedance grounding path. This allows the shielding housing 3 to more efficiently direct electromagnetic interference to the ground terminal of the motor housing, improving the overall electromagnetic shielding effectiveness and further improving EMC issues.

[0026] See also Figures 3 to 5 In this embodiment, a bushing 112 is riveted onto the mounting base 11. This bushing 112 enhances the mounting base 11's resistance to impact and deformation during installation, preventing cracking of the mounting base 11 or displacement of the shielding housing 3 due to external forces (such as installation and removal, or vibration), thereby extending the product's service life. Furthermore, an opening 311 corresponding to the position of the bushing 112 is defined at the top of the main body 31. This opening 311 prevents the bushing 112 from obstructing the mounting base 11 after the shielding housing 3 is assembled.

[0027] In this embodiment, the shielding shell 3 is made of SUS316L stainless steel and has a thickness of 0.4 mm. SUS316L stainless steel is a high-permeability material with excellent shielding effectiveness against high-frequency electromagnetic noise (such as harmonics generated by motor operation). It effectively isolates external electromagnetic fields from interfering with internal signals while suppressing internal electromagnetic leakage. SUS316L stainless steel contains molybdenum and has superior corrosion resistance to ordinary stainless steel. It is suitable for harsh environments such as high humidity, oil contamination, and coolant corrosion within the motor compartment. It prevents poor contact or structural failure of the shielding shell 3 due to corrosion, thereby extending the product's reliability under complex operating conditions. The 0.4 mm thickness of the shielding shell 3 balances shielding effectiveness and lightweight design. Too thin a thickness can result in insufficient shielding effectiveness or low structural strength, while too thick a thickness increases weight and cost. Furthermore, the 0.4 mm thickness facilitates forming through cold working processes such as stamping and bending, reducing mold development difficulty and processing costs.

[0028] See also Figure 3In this embodiment, the terminal 2 is a copper busbar, and nuts 21 are riveted on the upper and lower ends of the terminal 2. The copper busbar can ensure low impedance characteristics during large current transmission, reduce power loss and heat generation, and is suitable for the high power requirements of new energy vehicle motors. The nuts 21 riveted on the upper and lower ends provide a standardized threaded interface, which is convenient for quick connection with the motor harness and the electronic control harness through bolts, avoiding the looseness or poor contact problems that may occur in traditional crimped terminals 2, and improving assembly efficiency and connection reliability. Of course, in other embodiments, the terminal 2 can also be other conductive parts (such as copper columns, copper cables), and the present invention is not limited to this.

[0029] See also Figures 1 to 4 In this embodiment, a first sealing ring mounting groove 12 is provided on the upper outer wall of the terminal block housing 1. A first sealing ring 4 is sleeved within the first sealing ring mounting groove 12, and fixing glue is provided between the first sealing ring 4 and the first sealing ring mounting groove 12. By providing fixing glue between the first sealing ring 4 and the first sealing ring mounting groove 12, not only can the terminal block's waterproof rating be improved to IPX8, but it can also prevent the first sealing ring 4 from flipping or shifting during the plug-in and unplugging process, thereby ensuring sealing reliability. A second sealing ring mounting groove 113 is provided at the bottom of the mounting base 11. A second sealing ring 5 is sleeved within the second sealing ring mounting groove 113. The second sealing ring 5 is used to seal the gap between the terminal block and the motor mounting surface, and forms a two-way waterproof structure with the upper first sealing ring 4 to block moisture intrusion from both the electronic control end and the motor end.

[0030] See also Figure 3 In this embodiment, the upper ends of all terminals 2 are wrapped by the first primary plastic package 6, and the lower ends of all terminals 2 are wrapped by the second primary plastic package 7. All terminals 2, the first primary plastic package 6 and the second primary plastic package 7 are secondary plastic-molded with the terminal block housing 1. The terminals 2 and the terminal block housing 1 are overmolded twice. Firstly, the upper and lower ends of all the terminals 2 are pre-wrapped in the first overmolding process to form a uniform plastic base, so that the molten plastic flows more evenly during the second overmolding process, avoiding the problem of local glue thickness being too thin (easy to crack) or too thick (shrinkage and deformation) caused by the terminals 2 being directly embedded in the mold; secondly, the first overmolding process provides a fixed terminal positioning structure, and the position of the terminals 2 is not easily offset during the second overmolding process, thereby ensuring the overall dimensional accuracy of the terminal block (such as the spacing between the terminals 2 and the thickness of the terminal block housing 1) and reducing assembly defects caused by dimensional deviations; thirdly, the second overmolding mold has a simple structure, and the structures of the first and second overmolding molds do not require complex multi-sliders or core-pulling mechanisms, thereby reducing mold development costs; in addition, the terminals 2 after the first overmolding process can be quickly placed in the second overmolding mold, thereby reducing exhaust and weld mark problems during injection molding, and improving molding yield and production efficiency.

[0031] See also Figures 1 to 4In this embodiment, a plurality of injection ports 13 are provided around the middle side wall of the terminal block housing 1. The injection ports 13 are located between the first primary plastic package 6 and the second primary plastic package 7, and sealing glue is poured into the injection ports 13. Since a small gap will exist between the terminal 2 and the terminal block housing 1 after the terminal 2 is overmolded with plastic, water will penetrate from one end of the terminal 2 to the other end. To this end, this embodiment provides a plurality of injection ports 13 around the middle side wall of the terminal block housing 1, and pours sealing glue into the injection ports 13 to seal the gap between the terminal 2 and the terminal block housing 1, thereby blocking the path for moisture to penetrate along the axial direction of the terminal 2, thereby improving the waterproof level of the terminal block to IPX8. In addition, after the sealing glue is cured, it forms a composite bonding structure with the terminal block housing 1 and the terminal 2, thereby improving the overall vibration resistance of the terminal block and reducing the risk of connection failure caused by the relative displacement of the terminal 2 and the terminal block housing 1.

[0032] The manufacturing process of the above-mentioned bidirectional waterproof terminal block with a shielding shell includes the following steps: Step S1, making terminal 2.

[0033] Specifically, terminal 2 is a copper busbar. When the copper busbar is manufactured, it is first stamped and formed, then electroplated on the surface of the stamped copper busbar, and finally nuts 21 are riveted on the upper and lower ends of the electroplated copper busbar. The stamping process achieves precise forming of the copper busbar, ensuring the dimensional consistency of terminal 2, facilitating subsequent assembly with the nut 21 and the plastic package, and improving the stability of the conductive path. By electroplating the surface of the copper busbar (such as tin plating or silver plating), the oxidation resistance of terminal 2 can be enhanced, the contact resistance can be reduced, the conductive performance can be improved, and the corrosion of the copper busbar can be prevented, thereby extending the service life. By riveting the nuts 21 on the upper and lower ends of terminal 2, it is convenient to quickly connect with the motor harness and the electronic control harness through bolts, avoiding the looseness or poor contact problems that may occur in traditional crimped terminals 2, and improving assembly efficiency and connection reliability.

[0034] Step S2 : performing a primary overmolding on the upper and lower parts of all the terminals 2 to form a first primary overmolding body 6 and a second primary overmolding body 7 .

[0035] Step S3 , performing secondary overmolding on all the terminals 2 , the first primary overmolding body 6 and the second primary overmolding body 7 to form the terminal block housing 1 .

[0036] Step S4 , riveting bushings 112 at the four corners of the mounting base 11 of the terminal block housing 1 .

[0037] Step S5 : injecting sealing glue into the glue injection port 13 of the terminal block housing 1 to seal the gap between the terminal 2 and the terminal block housing 1 .

[0038] Step S6, assemble the shielding shell 3 on the terminal block shell 1, so that the main body 31 of the shielding shell 3 is inserted into the mounting seat 11, and the annular protrusion 32 is inserted into the middle part of the terminal block shell 1, so as to solve the signal interference of the electronic control end and achieve the effect of enhancing the stability of signal transmission. At the same time, it helps to solve the EMC problem and increase the reliability of the connection with the electronic control end.

[0039] Step S7. Brush fixing glue into the first sealing ring installation groove 12 on the outer wall of the upper end of the terminal block housing 1, and install the first sealing ring 4 in the first sealing ring installation groove 12. The fixing glue can prevent the first sealing ring 4 from flipping or shifting during the plugging and unplugging process, ensuring the sealing reliability of the connection with the electronic control end, and cooperating with the glue injection process to achieve IPX8 level waterproofing.

[0040] Step S8: Install the second sealing ring 5 into the second sealing ring installation groove 113 at the bottom of the mounting base 11. The second sealing ring 5 is used to seal the gap between the terminal block and the motor mounting surface, and forms a two-way waterproof structure with the first sealing ring 4 at the upper end to block moisture intrusion from the electronic control end and the motor end respectively.

[0041] The manufacturing process of the above-mentioned two-way waterproof terminal block with a shielded shell realizes the systematic optimization of the overmolding process, waterproof grade (IPX8) and EMC performance through the standardized process of "terminal processing → primary overmolding → secondary overmolding → riveting bushing → glue injection and sealing → shielded shell assembly → sealing ring assembly", and solves the problems of complex manufacturing process, difficult processing, high cost, low efficiency and ineffective EMC solution in the traditional built-in shielding cover solution; through the step-by-step implementation of primary overmolding and secondary overmolding, the deformation / appearance shrinkage / dimensional instability caused by uneven thickness of the overmolding glue is improved, the overmolding mold structure is simplified, and there is no need to set up a complex inner shielding cover installation cavity, which reduces assembly errors, reduces the dependence on the accuracy of the shell mold, reduces costs, and improves production efficiency.

[0042] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all such improvements and changes should fall within the scope of protection of the appended claims of the present invention.

[0043] The above is an exemplary description of the patent of the present invention in conjunction with the accompanying drawings. It is obvious that the implementation of the patent of the present invention is not limited to the above-mentioned method. As long as various improvements are made by adopting the method concept and technical solution of the patent of the present invention, or the concept and technical solution of the patent of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A bidirectional waterproof terminal block with a shielded shell, characterized in that: include: A wiring block housing, wherein a mounting base is provided at the lower end of the wiring block housing; A plurality of terminals are vertically inserted into the terminal block housing; The shielding shell includes a main body and an annular protrusion extending upward from the middle of the main body, the main body is sleeved outside the mounting seat, and the annular protrusion is sleeved outside the middle of the terminal block shell, and the top surface of the main body and the side surface of the annular protrusion are both provided with contact springs for contacting the wiring part of the electric control terminal.

2. The bidirectional waterproof terminal block with a shielding shell according to claim 1, characterized in that: A plurality of contact springs are arranged on the top surface of the main body along the periphery of the annular protrusion, and a plurality of contact springs are arranged on the periphery of the side surface of the annular protrusion.

3. The bidirectional waterproof terminal block with a shielding shell according to claim 1, characterized in that: A plurality of hanging platforms which are clamped with the mounting seats are arranged around the bottom of the side wall of the main body.

4. The bidirectional waterproof terminal block with a shielding shell according to claim 3, characterized in that: The edges around the bottom of the mounting seat are provided with a plurality of clamping grooves which are clamped with the hanging platform.

5. The bidirectional waterproof terminal block with a shielding shell according to claim 3, characterized in that: The bottom of the hanging platform is provided with a contact convex point for contacting the motor.

6. The bidirectional waterproof terminal block with a shielding shell according to claim 1, characterized in that: A bushing is riveted onto the mounting seat, and an opening corresponding to the position of the bushing is opened on the top of the main body.

7. The bidirectional waterproof terminal block with a shielding shell according to claim 1, characterized in that: The upper outer wall of the terminal block housing is provided with a first sealing ring installation groove, the first sealing ring is sleeved in the first sealing ring installation groove, and fixing glue is provided between the first sealing ring and the first sealing ring installation groove; A second sealing ring installation groove is provided at the bottom of the installation seat, and a second sealing ring is sleeved in the second sealing ring installation groove.

8. The bidirectional waterproof terminal block with a shielding shell according to claim 1, characterized in that: The upper ends of all the terminals are wrapped by the first primary plastic package, the lower ends of all the terminals are wrapped by the second primary plastic package, and all the terminals, the first primary plastic package, the second primary plastic package and the terminal block housing are secondary plastic packaged.

9. The bidirectional waterproof terminal block with a shielding shell according to claim 8, characterized in that: A plurality of glue injection ports are provided around the middle side wall of the terminal block housing. The glue injection ports are located between the first primary plastic package and the second primary plastic package. Sealant is poured into the glue injection ports to seal the gap between the terminal and the terminal block housing.

10. A manufacturing process for a bidirectional waterproof terminal block with a shielding shell according to any one of claims 1 to 9, characterized in that: include: Step S1, making terminals; Step S2, performing a primary overmolding on the upper and lower portions of all the terminals to form a first primary overmolded body and a second primary overmolded body; Step S3, performing secondary overmolding on all the terminals, the first primary overmolding body, and the second primary overmolding body to form a terminal block housing; Step S4, riveting a bushing on the mounting seat of the terminal block housing; Step S5, pouring sealing glue into the glue injection port of the terminal block housing to seal the gap between the terminal and the terminal block housing; Step S6, assembling a shielding shell on the terminal block shell; Step S7: Apply fixing glue to the first sealing ring installation groove on the outer wall of the upper end of the terminal block housing, and install the first sealing ring in the first sealing ring installation groove; Step S8: Install the second sealing ring in the second sealing ring installation groove at the bottom of the installation seat.

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