A power cable connection terminal

Abstract

The present application relates to the technical field of cable terminal, particularly relates to a power cable connecting terminal, which comprises a wiring unit, the wiring unit comprises an insulating shell, a connecting sleeve is installed in the insulating shell, and two elastic clamping parts are symmetrically connected on the connecting sleeve; the power cable connecting terminal further comprises a clamping sleeve unit, the clamping sleeve unit is provided with two and is symmetrically connected at both ends of the insulating shell, and the clamping sleeve unit comprises an insulating sleeve installed at the end of the insulating shell. The wiring unit, the clamping sleeve unit and the pressing unit are matched with each other, the functions of one-stage elastic clamping, two-stage rigid clamping and three-stage insulating skin clamping can be realized, the insertion depth of the conductive wire core is accurately ensured, large-area close contact is realized, the contact resistance is greatly reduced, the whole mechanical anchoring of the cable is formed, and the connection strength of the cable and the connecting terminal is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of cable terminal technology, and in particular to a power cable connection terminal. Background Technology

[0002] Connecting terminals are core components in electrical systems that enable cable conduction and line connection. They are widely used in industrial power distribution, power transmission, new energy equipment, and other scenarios. Their connection reliability, conductivity stability, mechanical protection, and ease of construction directly determine the safe operation and long service life of electrical circuits.

[0003] Existing cable connection terminals mostly adopt traditional structures such as bolt-clamping and cold-pressed nesting. Although they can meet basic conductive connection requirements, they have significant shortcomings in terms of adaptability to actual working conditions and long-term operational reliability. These terminals only clamp the conductive core of the cable at a single point. After the cable is inserted, it is easily misaligned or slipped under external force, leading to problems such as increased contact resistance and localized overheating. At the same time, cold-pressed terminals require special crimping tools, and bolted terminals require auxiliary instruments such as wrenches and torque wrenches, which not only makes the installation process cumbersome and time-consuming, but also reduces the efficiency of cable wiring.

[0004] Furthermore, existing connection terminals only clamp the conductive cores without simultaneously mechanically anchoring the cable insulation. When the cable is subjected to external force, the insulation and conductive cores are prone to relative slippage. This can cause the conductive cores to retract and fail to make contact, or even expose the cores, leading to safety hazards such as short circuits and electric shocks. Moreover, the axial tensile force on the cable is directly concentrated at the connection between the terminal and the cable. Long-term use can easily lead to conductor core breakage and insulation tearing, seriously affecting the safety and stability of the electrical connection and reducing the service life of the cable and connection terminals.

[0005] Therefore, there is an urgent need to provide a power cable connection terminal that can improve cable connection efficiency, connection strength, and tensile strength. Summary of the Invention

[0006] Therefore, it is necessary to provide a power cable connection terminal designed to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention employs the following technical solution: a power cable connection terminal, comprising: a wiring unit, wherein the wiring unit includes an insulating shell, a connecting sleeve is installed inside the insulating shell, and two elastic clamping parts are symmetrically connected to the connecting sleeve.

[0008] The power cable connection terminal also includes a clamping unit. Two clamping units are provided and symmetrically connected to both ends of the insulating shell. The clamping unit includes an insulating sleeve installed at the end of the insulating shell. Multiple circumferentially evenly distributed clamping parts are connected inside the insulating sleeve. A squeezing part for pushing the multiple clamping parts is connected to the outer periphery of the insulating sleeve.

[0009] The power cable connection terminal also includes a clamping unit, which is disposed on the insulating shell. The clamping unit includes two limiting parts symmetrically connected to the lower end of the insulating shell, and a pushing part is connected to both limiting parts.

[0010] Press the two elastic clamping parts in sequence, insert the two cables into the two ends of the connecting sleeve respectively, and then release. The elastic clamping parts complete the first-level elastic clamping of the cable conductive core, and the cable end insulation is placed inside the insulation sleeve.

[0011] The pusher pushes the elastic clamping parts on both sides, and limits them through the two limiting parts. This quickly makes the elastic clamping parts rigidly press the conductive core into the connecting sleeve, completing the second-level rigid clamping. At the same time, the pusher pushes the squeezing parts on both sides, and the squeezing parts press the cable insulation through the corresponding clamping parts, completing the third-level clamping and keeping the position of the cable insulation and the conductive core consistent.

[0012] Preferably, the elastic clamping part includes two clamping plates symmetrically arranged inside the connecting sleeve. A push column that slides through the connecting sleeve and the insulating shell is installed at the lower end of the clamping plate. Two lifting plates that slide through the connecting sleeve and the insulating shell are symmetrically installed at the upper end of the clamping plate. A pressing plate is installed at the upper end of the four lifting plates. A return spring is installed between the lower end of the pressing plate and the upper end of the insulating shell.

[0013] Preferably, the clamping part includes a movable plate that slides through the annular wall of the insulating sleeve. An adjusting plate is installed at one end of the movable plate inside the insulating sleeve. Two connecting springs are symmetrically installed between the adjusting plate and the inner annular surface of the insulating sleeve. A sliding groove is provided at one end of the adjusting plate near the axis of the insulating sleeve. A clamping plate is slidably connected in the sliding groove. A pushing block is provided between the clamping plate and the groove wall of the sliding groove. The pushing block is fixedly connected to the adjusting plate.

[0014] Preferably, the extrusion part includes a sliding ring that is slidably sleeved on the outer periphery of the insulating sleeve, the inner ring surface of the sliding ring is provided with an annular extrusion inclined surface, and the outer ring surface of the sliding ring is symmetrically hinged with two connecting rods.

[0015] Preferably, the limiting part includes a limiting frame installed at the lower end of the insulating shell with its opening facing the middle of the insulating sleeve. Sliding through holes are provided on both the front and rear side walls of the limiting frame, and multiple limiting teeth evenly distributed from top to bottom are installed on the inner end faces of the front and rear side walls of the limiting frame.

[0016] Preferably, the pushing part includes two slide rails installed in two limiting frames and in a vertical state. The two slide rails are slidably fitted with a pushing frame. The pushing frame is simultaneously hinged to the lower ends of four linkage rods. Pressing blocks are slidably passed through the front and rear frame walls of the pushing frame. A strip plate is installed at one end of the pressing block located inside the pushing frame.

[0017] Preferably, the pushing part further includes multiple telescopic springs installed between the two strip plates, and multiple locking teeth evenly distributed from top to bottom are provided on both sides of the pressing block. The locking teeth slide through the frame wall of the pushing frame and are fixedly connected to the strip plates.

[0018] Preferably, the locking tooth and the limiting tooth cooperate with each other, the structure of the locking tooth and the limiting tooth are the same and both are right-angled trapezoidal structures, the inclined surface of the locking tooth faces upward and the inclined surface of the limiting tooth faces downward.

[0019] Preferably, a rubber sealing ring is installed on the inner annular surface of the insulating sleeve near the insulating shell.

[0020] Preferably, the clamping plate has a clamping protrusion at one end near the insulating sleeve and a reversing protrusion at the other end away from the insulating sleeve, the reversing protrusion cooperating with the pushing block.

[0021] In summary, the present invention has the following beneficial technical effects: 1. The wiring unit, clamping unit and pressing unit used in the present invention cooperate with each other to achieve the functions of primary elastic clamping, secondary rigid clamping and tertiary insulating clamping, accurately ensuring the insertion depth of the conductive core, achieving large-area tight contact, significantly reducing contact resistance, forming an overall mechanical anchoring of the cable, and effectively improving the connection strength between the cable and the connecting terminal; and without the need for any auxiliary tools, the pushing part can simultaneously drive the secondary rigid clamping and the tertiary insulating clamping, simplifying and maximizing the wiring process, and greatly improving the connection efficiency between the cable and the connecting terminal.

[0022] 2. The clamping unit and the clamping unit used in this invention work together so that when the cable is pulled by external force, the clamping force will automatically increase with the pulling force, realizing passive self-locking force enhancement. This eliminates the relative slippage between the insulation and the wire core from the source, completely eliminates stress concentration at the connection between the cable and the terminal, avoids the exposure of the conductive wire core, significantly reduces the risk of oxidation and corrosion of the conductive wire core, short circuit and electric shock, adapts to harsh working conditions, and greatly extends the service life of the cable and the connection terminal. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0025] Figure 2 A front view of the present invention is shown.

[0026] Figure 3 A left view of the invention is shown.

[0027] Figure 4 It shows Figure 2 Sectional view of AA.

[0028] Figure 5 It shows Figure 3 A cross-sectional view of BB.

[0029] Figure 6 It shows Figure 5 A magnified view of region C in the middle.

[0030] Figure 7 A schematic diagram of the pressing unit of the present invention is shown.

[0031] Figure 8 The diagram shows the connection state of the two power cables and the connecting terminals of the present invention.

[0032] The above-mentioned figures include the following reference numerals: 1. Wiring unit; 10. Insulating shell; 11. Connecting sleeve; 12. Elastic clamping part; 120. Pressing plate; 121. Pushing column; 122. Lifting plate; 123. Pressing plate; 124. Return spring; 2. Clamping unit; 20. Insulating sleeve; 21. Clamping part; 210. Moving plate; 211. Adjusting plate; 212. Connecting spring; 213. Clamping part. 214. Holding plate; 22. Pushing block; 22. Extrusion part; 220. Sliding ring; 221. Extrusion inclined surface; 222. Linking rod; 3. Pressing unit; 30. Limiting part; 300. Limiting frame; 301. Sliding through hole; 302. Limiting tooth; 31. Pushing part; 310. Slide rail rod; 311. Pushing frame; 312. Pressing block; 313. Strip plate; 314. Telescopic spring; 315. Locking tooth. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] See Figures 1-4A power cable connection terminal includes a wiring unit 1, which includes an insulating shell 10. A connecting sleeve 11 is installed inside the insulating shell 10. The connecting sleeve 11 is made of conductive metal and has two elastic clamping parts 12 symmetrically connected on it. By pressing the two elastic clamping parts 12 in sequence and inserting two cables into the two ends of the connecting sleeve 11 respectively, the connection sleeve 11 is released. The elastic clamping parts 12 perform a first-level elastic clamping on the conductive core of the cable, effectively preventing the cable inserted into the connecting sleeve 11 from falling out during the subsequent locking operation. This ensures that the insertion depth of the conductive core meets the requirements, thereby ensuring the conductivity after the two cables are connected.

[0035] See Figure 1 , Figure 4 and Figure 5 The power cable connection terminal also includes two clamping units 2 symmetrically connected to both ends of the insulating shell 10. Each clamping unit 2 includes an insulating sleeve 20 installed at the end of the insulating shell 10. Multiple circumferentially evenly distributed clamping portions 21 are connected inside the insulating sleeve 20. A pressing portion 22 for pushing the multiple clamping portions 21 is connected to the outer periphery of the insulating sleeve 20. While the elastic clamping portion 12 performs a first-level elastic clamping of the cable's conductive core, the insulating sheaths at the ends of the two cables are respectively placed inside the insulating sleeve 20, with the multiple clamping portions 21 located on the outer periphery of the insulating sheath. The power cable connection terminal also includes components disposed on the insulating shell 10. The clamping unit 3 includes two limiting parts 30 symmetrically connected to the lower end of the insulating shell 10. A pushing part 31 is connected to both limiting parts 30. Manually pushing the pushing part 31 compresses and limits the elastic clamping parts 12 on both sides. Through the limitation by the two limiting parts 30, the elastic clamping parts 12 quickly and rigidly press the conductive core into the connecting sleeve 11, achieving secondary rigid clamping, realizing large-area tight contact, and significantly reducing contact resistance. Simultaneously, the pushing part 31 pushes the squeezing parts 22 on both sides, and the squeezing parts 22 press the cable insulation through the corresponding clamping parts 21, completing tertiary clamping (e.g., ...). Figure 8 As shown in the diagram, the cable insulation is aligned with the conductive core, and multiple clamping parts 21 press the cable insulation tightly, effectively preventing relative sliding between the insulation and the conductive core when the cable is stretched. This prevents the conductive core from being exposed to the air outside the connection terminal, reducing corrosion and oxidation of the conductive core, lowering the risk of short circuits and electric shock, eliminating stress at the connection between the cable and the connection terminal, and extending the service life of the cable and the connection terminal. The connection terminal can be used to connect the cable through a three-stage clamping method, and the wiring method is simple and quick. Mechanical locking is achieved directly by pressing, without the need for additional tools, effectively improving the strength and efficiency of the connection between the connection terminal and the cable.

[0036] See Figure 1 , Figure 4 and Figure 5The elastic clamping part 12 includes two clamping plates 120 symmetrically arranged inside the connecting sleeve 11. A pusher 121 that slides through the connecting sleeve 11 and the insulating shell 10 is installed at the lower end of the clamping plate 120. Two lifting plates 122 that slide through the connecting sleeve 11 and the insulating shell 10 are symmetrically installed at the upper end of the clamping plate 120. A pressing plate 123 is installed at the upper end of the four lifting plates 122. A return spring 124 is installed between the lower end of the pressing plate 123 and the upper end of the insulating shell 10.

[0037] In actual operation, initially, the two clamping plates 120 at one end of the connecting sleeve 11 are located in the middle of the connecting sleeve 11. When connecting the cable, first press one pressing plate 123. The pressing plate 123 is forced to move the corresponding four lifting plates 122 and compress the return spring 124. The four lifting plates 122 drive the two clamping plates 120 to move towards the bottom of the connecting sleeve 11 and open the connecting sleeve 11. Then, the cable is inserted into the connecting sleeve 11 from the end of the corresponding insulating sleeve 20. A rubber sealing ring is installed on the inner annular surface of the insulating sleeve 20 near the insulating shell 10. The inner diameter of the rubber sealing ring is smaller than the diameter of the cable. The cable passes through the middle of the rubber sealing ring. The rubber sealing ring is compressed and deformed, allowing the cable to pass through the rubber sealing ring. The rubber sealing ring is tightly attached to the cable insulation to achieve a sealing function. The insulation at the cable end is located inside the insulation sleeve 20. The conductive core of the cable is located on the upper end of the two clamping plates 120. The clamping plates 120 have arc-shaped grooves to limit the shaking of the conductive core. When the pressure on the pressing plate 123 is released, the compressed return spring 124 returns to its original position and drives the pressing plate 123 to return to its original position. The pressing plate 123 drives the two clamping plates 120 through the four lifting plates 122 to press the conductive core to the top of the connecting sleeve 11, realizing the function of primary elastic clamping of the cable conductive core. The elastic clamping steps of the cable are repeated to elastically clamp another cable to the other end of the connecting sleeve 11. The specifications of the return spring 124 are selected and used according to actual needs.

[0038] See Figure 4 , Figure 5 and Figure 7 The limiting part 30 includes a limiting frame 300 installed at the lower end of the insulating shell 10 and with its opening facing the middle of the insulating sleeve 20. Sliding through holes 301 are provided on both the front and rear side walls of the limiting frame 300, and multiple limiting teeth 302 evenly distributed from top to bottom are installed on the inner end faces of the front and rear side walls of the limiting frame 300.

[0039] In actual operation, while the clamping plate 120 elastically clamps the conductive wire core, the clamping plate 120 drives the push column 121 to move to the corresponding position within the limit frame 300.

[0040] See Figure 4 , Figure 5 and Figure 7The pushing part 31 includes two vertical slide rail rods 310 respectively installed in two limiting frames 300. A pushing frame 311 is slidably sleeved on the two slide rail rods 310. The pushing frame 311 is simultaneously hinged to the lower ends of four connecting rods 222. Pressing blocks 312 are slidably inserted on the front and rear frame walls of the pushing frame 311. A strip plate 313 is installed at one end of the pressing block 312 inside the pushing frame 311. The pushing part 31 also includes multiple telescopic springs 314 installed between the two strip plates 313. Multiple locking teeth 315 are evenly distributed from top to bottom on both sides of the pressing block 312. The locking teeth 315 slide through the frame wall of the pushing frame 311 and are fixedly connected to the strip plate 313.

[0041] See Figure 4 , Figure 5 and Figure 7 The locking tooth 315 and the limiting tooth 302 cooperate with each other. The structure of the locking tooth 315 and the limiting tooth 302 are the same and both are right-angled trapezoidal structures. The inclined surface of the locking tooth 315 faces upward and the inclined surface of the limiting tooth 302 faces downward.

[0042] In practice, after the two conductive cores are elastically clamped, the push frame 311 is pushed upward. The push frame 311 slides upward on the two slide rails 310, driving the pressing block 312, the strip plate 313, and the locking teeth 315 to move upward. The upper end of the push frame 311 is in close contact with the lower ends of the multiple push columns 121, and an upward pushing force is continued to be applied to the push frame 311 until the push frame 311 can no longer move upward. Then, the pushing of the push frame 311 is stopped. When the multiple locking teeth 315 move upward, they first contact the limiting teeth 302. After the inclined surface of the locking teeth 315 contacts the inclined surface of the limiting teeth 302, the multiple locking teeth 315 are forced to drive the corresponding strip plate 313 to move upward. The middle part of the push frame 311 moves and presses against multiple telescopic springs 314. Multiple locking teeth 315 move into the push frame 311, thereby removing the obstruction to the rise of the push frame 311. After the push frame 311 moves to the required position, the multiple locking teeth 315 reset and move to the upper end of the corresponding multiple limiting teeth 302. The upper horizontal surface of the multiple limiting teeth 302 is in close contact with the lower horizontal surface of the multiple locking teeth 315, so that the multiple limiting teeth 302 limit the multiple locking teeth 315, thereby limiting the push frame 311 and quickly pressing the conductive core rigidly into the connecting sleeve 11, realizing the secondary rigid clamping of the conductive core, and ensuring the strength of the connection between the two cables and the connecting terminal.

[0043] The structure of the locking teeth 315 and the limiting teeth 302 can be customized according to the required design size and density. The higher the density, the higher the clamping accuracy, the better the clamping effect, the wider the applicable cable size, and the higher the practicality.

[0044] See Figure 1 , Figure 4, Figure 5 and Figure 6 The clamping part 21 includes a movable plate 210 that slides through the annular wall of the insulating sleeve 20. The end of the movable plate 210 away from the insulating sleeve 20 is provided with a slope. An adjusting plate 211 is installed at the end of the movable plate 210 located inside the insulating sleeve 20. Two connecting springs 212 are symmetrically installed between the adjusting plate 211 and the inner annular surface of the insulating sleeve 20. A sliding groove is opened at the end of the adjusting plate 211 near the axis of the insulating sleeve 20. A clamping plate 213 is slidably connected in the sliding groove. A pushing block 214 is provided between the clamping plate 213 and the groove wall of the sliding groove. The pushing block 214 is fixedly connected to the adjusting plate 211.

[0045] See Figure 1 , Figure 5 and Figure 6 The extrusion part 22 includes a sliding ring 220 that is slidably sleeved on the outer periphery of the insulating sleeve 20. The inner ring surface of the sliding ring 220 is provided with an annular extrusion inclined surface 221, and the outer ring surface of the sliding ring 220 is symmetrically hinged with two connecting rods 222.

[0046] In specific operation, while the push frame 311 is pushed upward, it drives the four connecting rods 222 on both sides to move. The four connecting rods 222 drive the corresponding two sliding rings 220 to slide on the two insulating sleeves 20. The pressing slope 221 on the sliding ring 220 simultaneously pushes the slope on the multiple moving plates 210. The multiple moving plates 210 simultaneously drive the multiple adjusting plates 211 to move towards the insulation of the cable and fit tightly. The multiple adjusting plates 211 drive the multiple clamping plates 213 to clamp and limit the insulation of the cable. The multiple clamping plates 213 simultaneously clamp the conductive core inside the insulation, realizing the three-level clamping of the cable, which further improves the connection strength between the two cables and the connecting terminal. The insulation has a certain deformation capacity, which can provide operating space for the cooperation of multiple limiting teeth 302 and multiple locking teeth 315.

[0047] See Figure 1 , Figure 5 and Figure 6 The clamping plate 213 is provided with a clamping protrusion at one end near the insulating sleeve 20, and a reversing protrusion at the other end away from the insulating sleeve 20. The reversing protrusion cooperates with the push block 214.

[0048] In actual operation, when the clamped cable is pulled, the deflecting protrusion on the clamping plate 213 abuts against the pushing block 214. The pushing block 214 pushes the clamping plate 213, causing the clamping protrusion to further clamp the cable insulation, preventing relative sliding between the cable insulation and the conductive core. This prevents the conductive core from being exposed to the air outside the connection terminal, reduces corrosion and oxidation of the conductive core and short-circuit contacts, and eliminates stress at the connection between the cable and the connection terminal.

[0049] When the cable needs to be replaced, simply press the two pressing blocks 312. The pressing blocks 312 drive the locking teeth 315 into the push frame 311 through the strip plate 313 and separate them from the corresponding limiting teeth 302. Then, pull down the push frame 311. The push frame 311 releases the limiting of the push column 121. At the same time, the push frame 311 drives the sliding ring 220 to reset through the linkage rod 222. The stretched connecting spring 212 drives the adjusting plate 211 to reset, thereby releasing the clamping of the cable. Then, press the pressing plate 123. The pressing plate 123 is forced to move the corresponding four lifting plates 122 and release the elastic clamping of the conductive core, thus facilitating the quick replacement of the cable.

[0050] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "link," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A power cable connection terminal, characterized in that, include: A wiring unit, the wiring unit including an insulating shell, a connecting sleeve installed inside the insulating shell, and two elastic clamping parts symmetrically connected on the connecting sleeve; The jacket unit has two units that are symmetrically connected to both ends of the insulating shell. The jacket unit includes an insulating sleeve installed at the end of the insulating shell. Multiple circumferentially evenly distributed clamping parts are connected inside the insulating sleeve. A pressing part for pushing the multiple clamping parts is connected to the outer periphery of the insulating sleeve. A clamping unit is provided on the insulating shell. The clamping unit includes two limiting parts symmetrically connected to the lower end of the insulating shell, and a pushing part is connected to both limiting parts. Press the two elastic clamping parts in sequence, insert the two cables into the two ends of the connecting sleeve respectively, and then release. The elastic clamping parts complete the first-level elastic clamping of the cable conductive core, and the cable end insulation is placed inside the insulation sleeve. The pusher pushes the elastic clamping parts on both sides, and limits them through the two limiting parts. This quickly makes the elastic clamping parts rigidly press the conductive core into the connecting sleeve, completing the second-level rigid clamping. At the same time, the pusher pushes the squeezing parts on both sides, and the squeezing parts press the cable insulation through the corresponding clamping parts, completing the third-level clamping and keeping the position of the cable insulation and the conductive core consistent.

2. The power cable connection terminal according to claim 1, characterized in that: The elastic clamping part includes two clamping plates symmetrically arranged inside the connecting sleeve. A push column that slides through the connecting sleeve and the insulating shell is installed at the lower end of the clamping plate. Two lifting plates that slide through the connecting sleeve and the insulating shell are symmetrically installed at the upper end of the clamping plate. A pressing plate is installed at the upper end of the four lifting plates. A return spring is installed between the lower end of the pressing plate and the upper end of the insulating shell.

3. A power cable connection terminal according to claim 1, characterized in that: The clamping part includes a movable plate that slides through the annular wall of the insulating sleeve. An adjusting plate is installed at one end of the movable plate inside the insulating sleeve. Two connecting springs are symmetrically installed between the adjusting plate and the inner annular surface of the insulating sleeve. A sliding groove is opened at one end of the adjusting plate near the axis of the insulating sleeve. A clamping plate is slidably connected in the sliding groove. A pushing block is provided between the clamping plate and the groove wall of the sliding groove. The pushing block is fixedly connected to the adjusting plate.

4. A power cable connection terminal according to claim 1, characterized in that: The extrusion section includes a sliding ring that is slidably sleeved on the outer periphery of the insulating sleeve. The inner ring surface of the sliding ring is provided with an annular extrusion slope, and the outer ring surface of the sliding ring is symmetrically hinged with two connecting rods.

5. A power cable connection terminal according to claim 1, characterized in that: The limiting part includes a limiting frame installed at the lower end of the insulating shell with its opening facing the middle of the insulating sleeve. Sliding through holes are provided on both the front and rear side walls of the limiting frame, and multiple limiting teeth evenly distributed from top to bottom are installed on the inner end faces of the front and rear side walls of the limiting frame.

6. A power cable connection terminal according to claim 5, characterized in that: The pushing part includes two slide rails installed in two limiting frames and in a vertical state. The pushing frame is slidably sleeved on the two slide rails. The pushing frame is simultaneously hinged to the lower ends of four linkage rods. Pressing blocks are slidably inserted on the front and rear frame walls of the pushing frame. A strip plate is installed on one end of the pressing block located inside the pushing frame.

7. A power cable connection terminal according to claim 6, characterized in that: The push-up part also includes multiple telescopic springs installed between the two strip plates. Both sides of the pressing block are provided with multiple locking teeth evenly distributed from top to bottom. The locking teeth slide through the frame wall of the push-up frame and are fixedly connected to the strip plates.

8. A power cable connection terminal according to claim 7, characterized in that: The locking teeth and limiting teeth cooperate with each other. The structure of the locking teeth and the limiting teeth are the same and both are right-angled trapezoidal structures. The inclined surface of the locking teeth faces upward and the inclined surface of the limiting teeth faces downward.

9. A power cable connection terminal according to claim 1, characterized in that: A rubber sealing ring is installed on the inner annular surface of the insulating sleeve near the insulating shell.

10. A power cable connection terminal according to claim 3, characterized in that: The clamping plate has a clamping protrusion at one end near the insulating sleeve and a reversing protrusion at the other end away from the insulating sleeve. The reversing protrusion cooperates with the pushing block.

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