Electric connector with high protection grade

Abstract

The invention relates to the technical field of electric connectors, in particular to a high-protection-level electric connector which comprises an insertion core cylinder and a piercing cylinder. A plurality of cables are arranged in the insertion core cylinder in a penetrating manner, the plurality of cables are uniformly distributed in the circumferential direction of the insertion core cylinder, and each cable comprises an insulating sheath and a cable core; the piercing cylinder is used for being in coaxial butt joint with an insertion core cylinder, a plurality of piercing pieces are evenly distributed in the piercing cylinder in the circumferential direction, the piercing pieces correspond to cables one to one, and all the piercing pieces can slide in the axial direction of the piercing cylinder. The piercing piece is provided with a cutting groove extending along the length direction of the piercing piece, the cutting groove is V-shaped and is formed by connecting a plurality of sections of arc-shaped grooves, and the inner diameter of the arc-shaped grooves is gradually reduced from one end close to the insertion core cylinder to one end far away from the insertion core cylinder; when the inserting core cylinder is in butt joint with the puncturing cylinder, the end portion of the cable can slide along the cutting groove and enter the arc-shaped groove matched with the cutting groove in diameter, so that the high-protection-grade electric connector has certain universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical connectors, in particular to a high protection grade electrical connector. BACKGROUND

[0002] The high protection grade electrical connector usually adopts a piercing connector, which can maintain stable connection in harsh environments such as high temperature and vibration.

[0003] For example, the patent document with the publication number CN119764878B discloses a anti-loose electrical equipment electrical connector, which includes a coaxial plug-in plug core barrel and a piercing barrel. The inside of the plug core barrel is connected with multiple cables, the ends of the multiple cables extend along the radial direction of the plug core barrel and are uniformly distributed around the circumference of the plug core barrel. The piercing barrel is provided with multiple piercing pieces, which correspond to the cables one by one and extend along the axial direction of the piercing barrel. The cutting section, the pressing section and the conductive section arranged on the piercing piece successively contact the cable, and the cutting section cuts the insulating outer skin of the cable to expose the core. However, this connector can only be adapted to cables of specific size and type, and has poor universality, which is inconvenient to use. SUMMARY

[0004] Therefore, it is necessary to provide a high protection grade electrical connector to solve the technical problems of poor universality and inconvenience of the existing electrical connectors.

[0005] The above-mentioned purpose is achieved by the following technical scheme: A high protection grade electrical connector includes a plug core barrel and a piercing barrel. Multiple cables are arranged in the plug core barrel, and the ends of the cables extend along the radial direction of the plug core barrel. The cables include an insulating outer skin and a core. The piercing barrel is coaxially connected with the plug core barrel, and multiple piercing pieces are uniformly distributed around the circumference of the piercing barrel. The piercing pieces correspond to the cables one by one, and the length of the piercing piece extends along the axial direction of the piercing barrel. Each piercing piece can slide along the axial direction of the piercing barrel. The piercing piece has a cutting groove extending along its length direction. The cutting groove is V-shaped and connected by multiple arc-shaped grooves. The axis of the arc-shaped groove extends along the radial direction of the piercing barrel, and the inner diameter of the arc-shaped groove gradually decreases from the end close to the plug core barrel to the end away from the plug core barrel. When the plug core barrel is connected with the piercing barrel, the end of the cable can slide along the cutting groove and enter the arc-shaped groove matching its diameter, so that the core of the cable can be conductively connected with the piercing piece after the insulating outer skin of the cable is pierced.

[0006] Further, a plurality of locking members are arranged on the circumference of the piercing cylinder, the locking members correspond to the piercing pieces one by one, each of the locking members is used for limiting the sliding of each of the piercing pieces, the locking member comprises a locking bolt extending along the radial direction of the piercing cylinder, the end of the locking bolt is provided with a pressing sleeve, and the radial movement of the locking bolt relative to the piercing cylinder can make the pressing sleeve press the piercing piece, so as to limit the sliding of the piercing piece.

[0007] Further, the pressing sleeve is a hollow structure, and the pressing sleeve can extend and retract along the radial direction of the piercing cylinder.

[0008] Further, the pressing sleeve is a rubber sleeve.

[0009] Further, the piercing piece is provided with an arc-shaped long hole extending along the length direction of the piercing piece, the arc-shaped long hole is located at the end of the piercing piece away from the plug-in cylinder, the piercing cylinder is provided with a limiting pin penetrating through the piercing cylinder, the limiting pin extends along the radial direction of the piercing cylinder, and the limiting pin can be inserted into the arc-shaped long hole.

[0010] Further, the bottom of the cutting groove is connected with a circular connecting hole, and the axis of the circular connecting hole extends along the radial direction of the piercing cylinder.

[0011] Further, the inside of the plug-in cylinder is coaxially provided with a mounting cylinder, the mounting cylinder can slide along the axial direction of the plug-in cylinder, the end of the mounting cylinder away from the piercing cylinder is provided with an inner tapered surface, the cable is arranged in the inside of the mounting cylinder, the inner wall of the plug-in cylinder is fixedly provided with a rubber ring, the rubber ring is located on the side of the mounting cylinder away from the piercing cylinder and is arranged in correspondence with the mounting cylinder in the axial direction of the plug-in cylinder, the side of the rubber ring facing the mounting cylinder is provided with an annular elastic sheet, and the annular elastic sheet can be inserted into the inner tapered surface, so that the mounting cylinder and the plug-in cylinder are coaxially matched.

[0012] Further, the piercing cylinder is provided with a threaded hole, the locking bolt is threadedly arranged in the threaded hole, the outer circumferential surface of the piercing cylinder is provided with a scale line at the position corresponding to the threaded hole, the locking bolt is provided with a mark line, and the mark line and the scale line can indicate the rotation angle of the locking bolt.

[0013] Further, the center of the piercing cylinder is provided with an electric core, the electric core is conductively connected with the wires on the piercing cylinder, a plurality of conductive copper sheets are distributed on the circumference of the electric core, the plurality of conductive copper sheets are conductively connected with the electric core at the same time, and the conductive copper sheets correspond to the piercing pieces one by one and are conductively connected.

[0014] Further, the inner circumferential surface of the plug-in cylinder is provided with an internal thread, the outer circumferential surface of the piercing cylinder is provided with an external thread, and the plug-in cylinder and the piercing cylinder are connected through the threads.

[0015] The beneficial effects of the present application are: The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality.

[0016] Second, when it is needed to make the conductive contact of a cable with the piercing piece more firm, the piercing piece is pressed by the pressing sleeve by moving the corresponding locking bolt along the radial direction of the piercing cylinder, so that the piercing piece is fixed, and then the plunger cylinder is reciprocated along the axial direction of the plunger cylinder relative to the piercing cylinder, so that the end of the cable can be reciprocated relative to the arc-shaped slot on the piercing piece, the piercing piece can cut the insulating outer skin of the cable and rub the core, so that the piercing piece and the core change from point contact to line contact, the conductive contact area of the piercing piece and the cable is increased, and the stability of the conductive connection is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 2 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 1 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 3 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 2 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 4 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 2 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 5 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 2 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 6 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 5 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality. Figure 7 The high protection grade electric connector provided by the application has the advantages that: first, by arranging the arc-shaped slots with different inner diameters in the cutting groove of the piercing piece, cables with different sizes and types can be respectively clamped into the arc-shaped slots with diameters matching the cables, so that the high protection grade electric connector has certain universality.

[0018] Wherein: 100, wire; 210, piercing cylinder; 2101, scale; 211, external thread; 212, core; 213, locking bolt; 2131, identification line; 214, piercing piece; 2141, arc-shaped long hole; 2142, arc-shaped slot; 2143, circular connecting hole; 215, pressing sleeve; 216, conductive copper sheet; 217, limiting pin; 220, plunger cylinder; 221, internal thread; 222, mounting cylinder; 2221, internal conical surface; 223, annular elastic sheet; 224, rubber ring; 300, cable; 301, core; 302, insulating outer skin. DETAILED DESCRIPTION

[0019] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail by the following embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0020] The numbers of components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "coupling" in the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In the present application, unless otherwise specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0022] As Figures 1 to 7As shown, an embodiment of the present application provides a high protection grade electrical connector, which comprises a plug-in barrel 220 and a piercing barrel 210; a plurality of cables 300 are arranged in the plug-in barrel 220, and the plurality of cables 300 are uniformly distributed around the circumference of the plug-in barrel 220, and the end of each cable 300 extends along the radial direction of the plug-in barrel 220; the cable 300 comprises an insulating sheath 302 and a core 301; the piercing barrel 210 is coaxially connected with the plug-in barrel 220, and a plurality of piercing pieces 214 are uniformly distributed around the circumference of the piercing barrel 210, the piercing piece 214 corresponds to the cable 300 one by one, the length of the piercing piece 214 extends along the axial direction of the piercing barrel 210, and each piercing piece 214 can slide along the axial direction of the piercing barrel 210; the piercing piece 214 has a cutting groove extending along the length direction of the piercing piece 214, the cutting groove is V-shaped and connected by a plurality of arc grooves 2142, the axis of the arc groove 2142 extends along the radial direction of the piercing barrel 210, and the inner diameter of the arc groove 2142 gradually decreases from the end close to the plug-in barrel 220 to the end away from the plug-in barrel 220.

[0023] When the plug-in barrel 220 is connected with the piercing barrel 210, the end of the cable 300 can slide along the cutting groove and enter the arc groove 2142 matching the diameter of the cable 300, so that the insulating sheath 302 of the cable 300 is pierced and the core 301 can be electrically connected with the piercing piece 214.

[0024] In this way, the cables 300 of different sizes and types can be respectively clamped into the arc grooves 2142 matching the diameters of the cables 300 on the piercing pieces 214, so that the high protection grade electrical connector has a certain universality, and is convenient to use and process.

[0025] Further, a plurality of locking pieces are arranged around the circumference of the piercing barrel 210, the locking piece corresponds to the piercing piece 214 one by one, each locking piece is used to limit the sliding of each piercing piece 214, and the locking piece comprises a locking bolt 213 extending along the radial direction of the piercing barrel 210, the end of the locking bolt 213 is provided with a pressing sleeve 215, and the movement of the locking bolt 213 along the radial direction of the piercing barrel 210 can make the pressing sleeve 215 press the piercing piece 214, so as to limit the sliding of the piercing piece 214.

[0026] When it is needed to make the cable 300 and the conductive contact of the piercing piece 214 more firm, the piercing piece 214 is fixed by pressing it by moving the corresponding locking bolt 213 along the radial direction of the piercing cylinder 210 to press the sleeve 215, and then making the ferrule cylinder 220 reciprocate along the axial direction of the ferrule cylinder 220 relative to the piercing cylinder 210, so that the end of the cable 300 can reciprocate relative to the arc-shaped slot 2142 on the piercing piece 214, and the piercing piece 214 can scratch the insulating outer skin 302 of the cable 300 and rub the core 301, so that the piercing piece 214 and the core 301 change from point contact to line contact, which can increase the conductive contact area of the piercing piece 214 and the cable 300, and further enhance the stability of the conductive connection.

[0027] Further, the sleeve 215 is a hollow structure, and the sleeve 215 can expand and contract along the radial direction of the piercing cylinder 210. The hollow structure of the sleeve 215 enables it to expand and contract along the radial direction of the piercing cylinder 210, and further press and fix the piercing piece 214.

[0028] Further, the sleeve 215 is a rubber sleeve. The rubber sleeve will not scratch the piercing piece 214, and can avoid damage to the piercing piece 214.

[0029] Further, the piercing piece 214 is provided with an arc-shaped long hole 2141 extending along the length direction thereof, the arc-shaped long hole 2141 is located at the end of the piercing piece 214 away from the ferrule cylinder 220, the piercing cylinder 210 is provided with a limiting pin 217 penetrating therethrough, the limiting pin 217 extends along the radial direction of the piercing cylinder 210, and the limiting pin 217 can be inserted into the arc-shaped long hole 2141.

[0030] By providing the limiting pin 217 and the arc-shaped long hole 2141, the sliding of the piercing piece 214 can be ensured, and the piercing piece 214 can be prevented from being separated from the piercing cylinder 210.

[0031] Further, the bottom of the cutting slot is connected with a circular connecting hole 2143, and the axis of the circular connecting hole 2143 extends along the radial direction of the piercing cylinder 210.

[0032] The circular connecting hole 2143 facilitates the elastic expansion of the piercing piece 214 under the extrusion of the end of the cable 300, so that the end of the cable 300 can enter the arc-shaped slot 2142 matching the diameter thereof.

[0033] Further, the inside of the plug core barrel 220 is coaxially provided with a mounting barrel 222, the mounting barrel 222 can slide along the axial direction of the plug core barrel 220, the mounting barrel 222 is provided with an inner taper surface 2221 at the end away from the piercing barrel 210, the cable 300 is arranged in the inside of the mounting barrel 222, the inner wall of the plug core barrel 220 is fixedly provided with a rubber ring 224, the rubber ring 224 is arranged at the side of the mounting barrel 222 away from the piercing barrel 210 and corresponds to the mounting barrel 222 in the axial direction of the plug core barrel 220, the side of the rubber ring 224 facing the mounting barrel 222 is provided with an annular elastic sheet 223, the annular elastic sheet 223 can be inserted into the inner taper surface 2221, so that the mounting barrel 222 and the plug core barrel 220 are coaxially matched. In this way, the plug core barrel 220 and the mounting barrel 222 can be prevented from being separated, and the coaxial rotation matching of the two can be ensured.

[0034] Further, the piercing barrel 210 is provided with a threaded hole, the locking bolt 213 is threadedly arranged in the threaded hole, the piercing barrel 210 is provided with a scale line 2101 on the outer circumferential surface at the position corresponding to the threaded hole, the locking bolt 213 is provided with a mark line 2131, and the mark line 2131 and the scale line 2101 can indicate the rotation angle of the locking bolt 213.

[0035] The rotation angle of the locking bolt 213 can be observed through the mark line 2131 and the scale line 2101, and then it can be judged whether the piercing sheet 214 is locked.

[0036] Further, the center of the piercing barrel 210 is provided with an electric core 212, the electric core 212 is in conductive connection with the wire 100 on the piercing barrel 210, a plurality of conductive copper sheets 216 are distributed in the circumferential direction of the electric core 212, the plurality of conductive copper sheets 216 are in conductive connection with the electric core 212 at the same time, and the conductive copper sheets 216 are in one-to-one correspondence with and in conductive connection with the piercing sheets 214.

[0037] Further, the inner circumferential surface of the plug core barrel 220 is provided with an inner thread 221, the outer circumferential surface of the piercing barrel 210 is provided with an outer thread 211, and the plug core barrel 220 and the piercing barrel 210 are connected through threads.

[0038] In combination with the above embodiment, the use principle and working process of the embodiment of the application are as follows: The plurality of cables 300 are arranged in the mounting barrel 222 of the plug core barrel 220, so that the end of the cable 300 extends along the radial direction of the plug core barrel 220.

[0039] In the initial state, as shown in Figure 3As shown, the piercing cylinder 210 and the ferrule cylinder 220 are in the first state. At this time, the compression sleeve 215 is tightened by rotating the locking bolt 213, so that the piercing piece 214 is compressed and kept in place. Then the ferrule cylinder 220 is coaxially corresponding and threaded with the piercing cylinder 210. As shown, Figure 5 As shown, the piercing cylinder 210 and the ferrule cylinder 220 are in the second state. At this time, the cable 300 inside the ferrule cylinder 220 will correspond to the piercing piece 214 inside the piercing cylinder 210 one by one, and the end of the cable 300 will gradually enter the arc-shaped groove 2142 of the cutting groove. In this process, the end of the cable 300 will be pushed by the arc-shaped groove 2142 on the piercing piece 214, so that the end of the cable 300 will drive the mounting cylinder 222 to slide away from the piercing cylinder 210, so that the inner tapered surface 2221 of the mounting cylinder 222 extrudes the annular spring 223, and the annular spring 223 shrinks inward to extrude the cable 300, while the annular spring 223 axially extrudes the rubber ring 224, so that the rubber ring 224 is deformed under pressure and compresses the cable 300 and the ferrule cylinder 220, realizing the sealed connection of the cable 300 and the ferrule cylinder 220.

[0040] Then continue to move the ferrule cylinder 220 close to the piercing cylinder 210, when the resistance of the ferrule cylinder 220 close to the piercing cylinder 210 increases, it means that the end of the cable 300 enters the arc-shaped groove 2142 matched with its diameter, which can pierce the insulating outer skin 302 of the cable 300. By making the ferrule cylinder 220 reciprocate relative to the piercing cylinder 210, the end of the cable 300 can be continuously close to or away from the arc-shaped groove 2142 matched in diameter on the piercing piece 214, so that the arc-shaped groove 2142 pierces the insulating outer skin 302 and repeatedly cuts the internal wire core 301, thereby increasing the contact area of the wire core 301 and the piercing piece 214, and further enhancing the stability of the conductive connection.

[0041] Then continue to move the ferrule cylinder 220 close to the piercing cylinder 210, when the resistance of the ferrule cylinder 220 close to the piercing cylinder 210 increases, it means that the end of the cable 300 enters the arc-shaped groove 2142 matched with its diameter, which can pierce the insulating outer skin 302 of the cable 300. By making the ferrule cylinder 220 reciprocate relative to the piercing cylinder 210, the end of the cable 300 can be continuously close to or away from the arc-shaped groove 2142 matched in diameter on the piercing piece 214, so that the arc-shaped groove 2142 pierces the insulating outer skin 302 and repeatedly cuts the internal wire core 301, thereby increasing the contact area of the wire core 301 and the piercing piece 214, and further enhancing the stability of the conductive connection.

[0042] Any combination of the technical features in the above embodiments can be made, and for the sake of brevity, not all possible combinations are described above. However, any combination of the technical features is deemed to be within the scope of the present disclosure as long as such a combination does not result in an inconsistency.

[0043] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but should not be understood as a limitation on the scope of the present application. It should be pointed out that, for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A high-protection-level electrical connector, characterized in that, include: A core tube, wherein multiple cables are threaded through the core tube, the multiple cables are evenly distributed around the circumference of the core tube, and the ends of each cable extend radially along the core tube, the cables including an insulating sheath and a wire core; A piercing tube is used for coaxial docking with a core tube. Multiple piercing plates are evenly distributed around the circumference of the piercing tube, each corresponding to a cable. The length of each piercing plate extends axially along the piercing tube, and each piercing plate can slide axially along the piercing tube. Each piercing plate has a cutting groove extending along its length. The cutting groove is V-shaped and formed by multiple arc-shaped grooves connected together. The axis of the arc-shaped groove extends radially along the piercing tube, and the inner diameter of the arc-shaped groove gradually decreases from the end closer to the core tube to the end farther away from the core tube. When the insert cylinder and the piercing cylinder are connected, the end of the cable can slide along the cutting groove and enter the arc-shaped groove that matches its diameter, so that the core of the cable can be electrically connected to the piercing plate after the insulation sheath of the cable is pierced.

2. The high-protection-level electrical connector according to claim 1, characterized in that, The puncture cylinder has multiple locking elements in its circumferential direction. Each locking element corresponds to a puncture piece. Each locking element is used to restrict the sliding of each puncture piece. Each locking element includes a locking bolt extending radially along the puncture cylinder. The end of the locking bolt is provided with a clamping sleeve. The movement of the locking bolt along the radial direction of the puncture cylinder can cause the clamping sleeve to press against the puncture piece, thereby restricting the sliding of the puncture piece.

3. The high-protection-level electrical connector according to claim 2, characterized in that, The clamping sleeve has a hollow structure and can extend and retract radially along the puncture cylinder.

4. The high-protection-level electrical connector according to claim 3, characterized in that, The clamping sleeve is a rubber sleeve.

5. The high-protection-level electrical connector according to claim 1, characterized in that, The piercing piece has an arc-shaped elongated hole extending along its length. The arc-shaped elongated hole is located at the end of the piercing piece away from the insert cylinder. A limiting pin is inserted through the piercing cylinder. The limiting pin extends radially along the piercing cylinder and can be inserted into the arc-shaped elongated hole.

6. The high-protection-level electrical connector according to claim 1, characterized in that, The bottom of the cutting groove is connected to a circular connecting hole, and the axis of the circular connecting hole extends radially along the piercing cylinder.

7. The high-protection-level electrical connector according to claim 1, characterized in that, The insert cylinder has a mounting cylinder that rotates coaxially inside, and the mounting cylinder can slide along the axial direction of the insert cylinder. The end of the mounting cylinder away from the puncture cylinder has an inner conical surface. The cable passes through the interior of the mounting cylinder. A rubber ring is fixedly provided on the inner wall of the insert cylinder. The rubber ring is located on the side of the mounting cylinder away from the puncture cylinder and is correspondingly arranged with the mounting cylinder in the axial direction of the insert cylinder. An annular spring is provided on the side of the rubber ring facing the mounting cylinder. The annular spring can be inserted into the inner conical surface, so that the mounting cylinder and the insert cylinder maintain a coaxial fit.

8. The high-protection-level electrical connector according to claim 2, characterized in that, The piercing cylinder is provided with a threaded hole, and the locking bolt is threadedly fitted in the threaded hole. The outer circumference of the piercing cylinder is provided with a scale line corresponding to the position of the threaded hole, and the locking bolt is provided with a marking line. The marking line and the scale line cooperate to indicate the rotation angle of the locking bolt.

9. The high-protection-level electrical connector according to claim 1, characterized in that, The center of the piercing tube is equipped with an electric core, which is electrically connected to the wires on the piercing tube. Multiple conductive copper plates are distributed around the circumference of the electric core, and the multiple conductive copper plates are simultaneously electrically connected to the electric core. The conductive copper plates correspond one-to-one with the piercing plates and are electrically connected.

10. The high-protection-level electrical connector according to claim 1, characterized in that, The inner circumferential surface of the insert cylinder is provided with an internal thread, and the outer circumferential surface of the piercing cylinder is provided with an external thread. The insert cylinder and the piercing cylinder are connected by threads.

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