Combined electrical secondary wiring terminal sealing device

Abstract

The invention discloses a combined electrical secondary wiring terminal sealing device which comprises a first wiring terminal, and one end of the first wiring terminal is movably connected with a second wiring terminal. One end of the second wiring terminal is fixedly connected with a sleeve, the first wiring terminal is slidably installed on the inner surface of the sleeve, one end of the first wiring terminal and one end of the second wiring terminal are fixedly provided with external expansion type threaded pipes, and one end of each external expansion type threaded pipe is fixedly provided with a baffle plate; bolts are slidably mounted on the outer surfaces of the first wiring end and the second wiring end, and the bolts are mounted on the outer surface of the external expansion type threaded pipe in a threaded mode. The screw rod is rotated to drive the fixing ball to be tightly attached to joints of two wires so that the fastening effect on the wires can be achieved, the two bolts are rotated to enable the external expansion type threaded pipe to be tightened inwards, then the external expansion type threaded pipe is tightly attached to the outer surfaces of the wires so that the sealing effect can be achieved, and the wires can pass through the rubber rings in the threading process; the elasticity of the rubber ring can be tightly attached to the outer surface of the wire, so that the sealing performance of the whole wiring terminal is improved.

Description

Technical Field

[0001] The invention relates to the technical field of terminal sealing, in particular to a combined electrical secondary terminal sealing device. Background Art

[0002] Terminal blocks are accessories used to make electrical connections and fall under the category of connectors. With the development of the electronics industry, the range of applications for terminal blocks has expanded, and their variety has also increased. Commonly used terminal blocks are a piece of metal enclosed in insulating plastic, with holes at each end for inserting wires and screws for tightening and loosening them. Terminal blocks allow two wires to be connected and disconnected at any time without having to solder or twist them together, making connections quick and easy.

[0003] After searching, the patent document with publication number CN216529559U discloses a sealing device with a dust-proof structure for a terminal block, which includes a sub-terminal and a mother terminal. The sub-terminal and the mother terminal are pre-fixed by a threaded connection. The front end of the sub-terminal is provided with a circle of external threads on the outside, and the front end of the mother terminal is provided with an internal threaded hole that matches the external threads of the sub-terminal.

[0004] In this sealing device, by using two protective covers to seal the connection part after the sub-terminal and the mother terminal are pre-connected, the connection can be effectively sealed against dust, reducing the probability of water vapor, dust, etc. entering the connection, greatly increasing the reliability of the terminal. However, when using it, there is a lack of a fixed structure for the wires after the two wires are passed through the terminal. Although the two terminals are tightly connected, when the wires are pulled, the wires are easily detached from the terminal.

[0005] Therefore, in order to solve the above problems, a combined electrical secondary terminal sealing device is proposed. Summary of the Invention

[0006] In order to remedy the deficiencies of the prior art and solve the problem that the connection terminals and wires are not tightly fixed, the present invention proposes a combined electrical secondary connection terminal sealing device.

[0007] A combined electrical secondary terminal sealing device comprises a first terminal, one end of which is movably connected to a second terminal;

[0008] One end of the second terminal is fixedly connected to a sleeve, the first terminal is slidably installed on the inner surface of the sleeve, one end of the first terminal and the second terminal are fixedly installed with an outward-expanded threaded tube, one end of the outward-expanded threaded tube is fixedly installed with a baffle, the outer surfaces of the first terminal and the second terminal are slidably installed with bolts, the bolt threads are installed on the outer surface of the outward-expanded threaded tube, the first terminal is slidably installed on the inner surface of the sleeve, and the inner surfaces of the first terminal and the second terminal are fixedly installed with rubber rings.

[0009] Preferably, two fixing blocks are fixedly installed on the outer surface of the first terminal, a first groove is opened on one side of the fixing block, two second grooves are evenly opened on the outer surface of the first terminal, and two limit blocks are evenly fixedly installed on the outer surface of the first terminal.

[0010] Preferably, the outward-expanding threaded tube and the rubber ring are both funnel-shaped, the end of the outward-expanding threaded tube with a smaller diameter is fixedly connected to the first terminal and the second terminal, and the end of the rubber ring with a larger diameter is close to the outward-expanding threaded tube.

[0011] Preferably, two third grooves are provided on the inner surface of the sleeve, two first connecting blocks are fixedly installed on the outer surface of the sleeve, a first telescopic rod is rotatably installed in the middle of the first connecting block, a fourth groove is provided on one side of the first telescopic rod, a fifth groove is provided on the inner surface of the fourth groove, a first clamping block is slidably installed on the inner surface of the fourth groove, and one end is fixedly connected to the first clamping block.

[0012] Preferably, a second clamping block is fixedly installed at one end, and the second clamping block is slidably installed on the inner surface of the fifth groove. One end of the second clamping block is fixedly connected to a first spring, and the first spring is fixedly installed on the inner surface of the fifth groove.

[0013] Preferably, the limiting block is slidably mounted on the inner surface of the third groove, the first clamping block is movably mounted on the inner surface of the first groove, and both the first groove and the first clamping block are chamfered.

[0014] Preferably, a sixth groove is provided on the outer surface of the sleeve, a second connecting block is fixedly installed on one side of the sixth groove, the second connecting block is fixedly installed on the outer surface of the sleeve, a threaded groove is provided on one side of the second connecting block, a screw is threadedly installed on the inner surface of the threaded groove, a fixing ball is fixedly installed on one end of the screw, and the fixing ball is slidably installed on the inner surface of the sixth groove and the second groove.

[0015] Preferably, a third connecting block is fixedly installed on the outer surface of the second terminal, a seventh groove is provided on one side of the third connecting block, two eighth grooves are provided on the inner surface of the seventh groove, a second spring is fixedly installed on the inner surface of the eighth groove, and a sealing plate is fixedly connected to the top of the two second springs, and the sealing plate is slidably installed on the inner surface of the seventh groove, and ninth grooves are provided on both sides of the third connecting block, and a sliding rod is slidably installed on the inner surface of the ninth groove. The third spring is wrapped around the outer surface of the sliding rod, and the sliding rod is slidably installed on the inner surface of the limiting hole. Limiting holes are provided on both sides of the sealing plate, and two sealing grooves are provided on one side of the third connecting block. Sealing blocks are fixedly installed on both sides of the sealing plate, and the sealing blocks are movably installed on the inner surface of the sealing groove.

[0016] The present invention is beneficial in that:

[0017] 1. The present invention first allows the two wires to pass through the first terminal and the second terminal respectively, then connects the two wires, and then places the joint in the inner cavity of the sleeve. By rotating the screw, the screw is driven to move toward the inner cavity of the first terminal, and then the screw drives the fixing ball to move. The fixing ball first passes through the sixth groove, then passes through the second groove and finally contacts the joint of the wire. As the screw continues to rotate, the fixing ball squeezes the joint of the wire, thereby achieving the purpose of fixing the joint of the wire. At the same time, rotating the bolt along the outward-expanded threaded tube can cause the outward-expanded threaded tube to contract, thereby achieving the purpose of fixing the two wires to the first terminal and the second terminal respectively. By fixing the wires twice, the tightness of the connection between the wires and the first terminal and the second terminal can be increased. At the same time, when the wires are passed into the first terminal and the second terminal, the wires will also pass through the rubber ring. The elasticity of the rubber ring can fit tightly against the outer surface of the wire, thereby increasing the sealing of the entire terminal.

[0018] 2. The present invention rotates the first telescopic rod so that the first clamping block is on one side of the first groove and corresponds to the first groove. When the first spring is released, the first clamping block slides along the fourth groove, and the second clamping block slides along the fifth groove, further causing the first clamping block to slide to the inner surface of the first groove, thereby further increasing the tightness of the connection between the first terminal and the second terminal.

[0019] 3. The present invention allows the wire to pass through the outward-expanded threaded tube into the inner cavity of the second terminal, and then pulls the two sliding rods. At this time, the sealing plate slides along the seventh groove, and at the same time, the sealing plate squeezes the second spring. The second spring shrinks to the inner cavity of the eighth groove, and the sealing block slides to the inner surface of the sealing groove and the sealing block and the sealing groove are fully engaged and sealed. At this time, the sliding rod is released. Under the action of the third spring, the sliding rod slides across the ninth groove and the limiting hole to further fix the sealing plate, thereby realizing the sealing of a single wire end. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure of the first terminal according to an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the internal structure of a first terminal according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a casing connection structure according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the outer surface connection structure of a casing according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the connection structure of the third connection block according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the internal structure of the third connecting block according to an embodiment of the present invention.

[0028] In the figure: 1. first terminal; 11. fixing block; 111. first groove; 12. second groove; 13. limiting block; 14. outward-expanding threaded tube; 141. baffle; 15. bolt; 16. rubber ring; 2. second terminal; 21. sleeve; 211. third groove; 212. sixth groove; 22. first connecting block; 23. first telescopic rod; 2311. fourth groove; 231. fifth groove; 232. first spring; 2331. first clamping block; 2332. second clamping block; 24. second connecting block; 241. threaded groove; 25. screw; 251. fixing ball; 26. third connecting block; 261. seventh groove; 262. eighth groove; 263. second spring; 264. third spring; 265. sliding rod; 266. ninth groove; 267. sealing groove; 27. sealing plate; 271. sealing block; 272. limiting hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] See also Figure 1-7 As shown, a combined electrical secondary terminal sealing device includes a first terminal 1, one end of which is movably connected to a second terminal 2;

[0031] One end of the second terminal 2 is fixedly connected to a sleeve 21, and the first terminal 1 is slidably installed on the inner surface of the sleeve 21. One end of the first terminal 1 and the second terminal 2 are both fixedly installed with an outward-expanded threaded tube 14, and one end of the outward-expanded threaded tube 14 is fixedly installed with a baffle 141. Bolts 15 are slidably installed on the outer surfaces of the first terminal 1 and the second terminal 2, and the bolts 15 are threadedly installed on the outer surface of the outward-expanded threaded tube 14. The first terminal 1 is slidably installed on the inner surface of the sleeve 21, and rubber rings 16 are fixedly installed on the inner surfaces of the first terminal 1 and the second terminal 2.

[0032] After connecting the two wires together, the joint is wrapped with the terminal block to achieve a sealing effect. However, the lack of fixation of the two wires can still easily cause the two wires to spread out.

[0033] When the present invention is in use, the two wires are first connected together, and then the joint is placed in the inner cavity of the sleeve 21. Then, the two bolts 15 are rotated respectively. When the bolts 15 are rotated to the outer surface of the outward-expanding threaded tube 14, the outward-expanding threaded tube 14 will gradually be driven to converge toward the middle, thereby achieving the squeezing and fixation of the wires. Generally, the bolts 15 will not be rotated to the position of contacting the baffle 141. When the bolts 15 can contact the baffle 141, it means that the outward-expanding threaded tube 14 cannot be tightened by the bolts 15 to fix the wires. When the two wires are not connected yet, first pass the wires through the first terminal 1 and the second terminal 2 respectively. When threading the wires, the wires will pass through the rubber ring 16 inside the first terminal 1 and the second terminal 2. The rubber ring 16 can shrink and expand, thereby enabling the rubber ring 16 to wrap the outer surface of wires of different sizes, further strengthening the sealing of the wires.

[0034] Further, such as Figures 2 to 5 As shown, two fixing blocks 11 are fixedly installed on the outer surface of the first terminal 1, and a first groove 111 is formed on one side of the fixing block 11. Two second grooves 12 are evenly formed on the outer surface of the first terminal 1, and two limit blocks 13 are evenly fixedly installed on the outer surface of the first terminal 1;

[0035] The outward-expanding threaded tube 14 and the rubber ring 16 are both funnel-shaped. The end of the outward-expanding threaded tube 14 with a smaller diameter is fixedly connected to the first terminal 1 and the second terminal 2, and the end of the rubber ring 16 with a larger diameter is close to the outward-expanding threaded tube 14.

[0036] Two third grooves 211 are formed on the inner surface of the sleeve 21, and two first connecting blocks 22 are fixedly installed on the outer surface of the sleeve 21. A first telescopic rod 23 is rotatably installed in the middle of the first connecting block 22, and a fourth groove 2311 is formed on one side of the first telescopic rod 23. A fifth groove 231 is formed on the inner surface of the fourth groove 2311, and a 233 is slidably installed on the inner surface of the fourth groove 2311. One end of the 233 is fixedly connected to the first clamping block 2331.

[0037] A second clamping block 2332 is fixedly installed at one end of the 233, and the second clamping block 2332 is slidably installed on the inner surface of the fifth groove 231. One end of the second clamping block 2332 is fixedly connected to the first spring 232, and the first spring 232 is fixedly installed on the inner surface of the fifth groove 231.

[0038] The limiting block 13 is slidably mounted on the inner surface of the third groove 211, and the first clamping block 2331 is movably mounted on the inner surface of the first groove 111. The first groove 111 and the first clamping block 2331 are both chamfered.

[0039] A sixth groove 212 is provided on the outer surface of the sleeve 21, and a second connecting block 24 is fixedly installed on one side of the sixth groove 212. The second connecting block 24 is fixedly installed on the outer surface of the sleeve 21, and a threaded groove 241 is provided on one side of the second connecting block 24. A screw 25 is threadedly installed on the inner surface of the threaded groove 241, and a fixing ball 251 is fixedly installed on one end of the screw 25. The fixing ball 251 is slidably installed on the inner surface of the sixth groove 212 and the second groove 12.

[0040] When the present invention is in use, first pass the first terminal 1 through the inner surface of the sleeve 21. During the process of inserting the first terminal 1, it is necessary to make the two limit blocks 13 correspond to the two third grooves 211 respectively, and then push the first terminal 1. During the installation of the first terminal 1, the two first telescopic rods 23 are in a horizontal state. After the first terminal 1 is installed, the two first telescopic rods 23 are rotated, and 233 will also rotate. While rotating, pull 233, and the second block 2332 will slide on the inner surface of the fifth groove 231. At the same time, it will also pull the first spring 232 to extend. The first spring 232 always has a pulling force on 233, and finally the first block 2331 is located on one side of the first groove 111, so that The first clamping block 2331 is facing the first groove 111. At this time, the first clamping block 2331 is released. The first clamping block 2331 will shrink under the pull of the first spring 232, and the first clamping block 2331 will slide to the inner surface of the first groove 111. Since the first groove 111 and the first clamping block 2331 are both chamfered, the first clamping block 2331 can smoothly enter the first groove 111. By making the first clamping block 2331 on the inner surface of the first groove 111, the first terminal 1 and the second terminal 2 can be tightly connected. In addition, the second clamping block 2332 provided at one end of 233 can prevent 233 from being separated from the first telescopic rod 23, thereby preventing the first terminal 1 and the second terminal 2 from being separated during use.

[0041] The screw 25 can be driven to move by rotating it along the inner surface of the thread groove 241. When in use, the connection point of the two wires connected together is located at the bottom of the fixing ball 251. When the screw 25 is rotated, the fixing ball 251 will pass through the sixth groove 212 and the second groove 12. The fixing ball 251 in the second groove 12 squeezes the connection point of the two wires under the drive of the screw 25, further enhancing the fixing effect of the wires.

[0042] Further, such as Figure 6 and Figure 7As shown, a third connecting block 26 is fixedly installed on the outer surface of the second terminal 2, and a seventh groove 261 is provided on one side of the third connecting block 26, and two eighth grooves 262 are provided on the inner surface of the seventh groove 261, and a second spring 263 is fixedly installed on the inner surface of the eighth groove 262. The tops of the two second springs 263 are fixedly connected to a sealing plate 27, and the sealing plate 27 is slidably installed on the inner surface of the seventh groove 261. Ninth grooves 266 are provided on both sides of the third connecting block 26, and a sliding rod 265 is slidably installed on the inner surface of the ninth groove 266. The outer surface of the sliding rod 265 is wrapped with a third spring 264, and the sliding rod 265 is slidably installed on the inner surface of the limiting hole 272. Limiting holes 272 are provided on both sides of the sealing plate 27, and two sealing grooves 267 are provided on one side of the third connecting block 26. Sealing blocks 271 are fixedly installed on both sides of the sealing plate 27, and the sealing block 271 is movably installed on the inner surface of the sealing groove 267.

[0043] When the present invention is in use, in some cases it is necessary to seal a single wire end. At this time, the wire end is first passed through the outward-expanded threaded tube 14 into the second terminal 2, and then the baffle 141 is rotated to tighten one end of the wire end to achieve the purpose of fixing the wire to the terminal. Then the sliding rod 265 is pulled out toward the third connecting block 26. At this time, the sliding rod 265 is disengaged from the ninth groove 266 and the limiting hole 272, so that the sealing plate 27 can slide freely along the seventh groove 261 and squeeze the sealing plate 27 toward the inner surface of the seventh groove 261. The sealing plate 27 compresses the second spring 263 to compress the second spring 263 into the eighth groove 262. The design of the second spring 263 allows the sealing plate 27 to be disengaged from the seventh groove 261 when it is necessary to pull the sealing plate 27 out of the seventh groove 261. The sliding rod 265 can move the second spring 263 to pop out the sealing plate 27. When the bottom of the sealing plate 27 contacts the bottom wall of the seventh groove 261, the limiting hole 272 on the outside corresponds to the ninth groove 266. At this time, the sliding rod 265 is released. Under the action of the third spring 264, the sliding rod 265 slides along the ninth groove 266 and slides into the inner surface of the limiting hole 272 to fix the sealing plate 27. When one side of the sealing plate 27 contacts the bottom wall of the seventh groove 261, the sealing block 271 will be on the inner surface of the sealing groove 267. The outer contour of the sealing block 271 is the same as the inner contour of the sealing groove 267. Therefore, when in use, the sealing block 271 as a whole will be completely on the inner surface of the sealing groove 267, further improving the sealing effect of the second terminal 2.

[0044] Working principle: First, pass the two wires through the first terminal 1 and the second terminal 2 respectively, then connect the two wires, and then place the joint in the inner cavity of the sleeve 21. By rotating the screw 25, the screw 25 is driven to move toward the inner cavity of the first terminal 1, and then the screw 25 drives the fixing ball 251 to move. The fixing ball 251 first passes through the sixth groove 212, then passes through the second groove 12 and finally contacts the joint of the wire. As the screw 25 continues to rotate, the fixing ball 251 squeezes the joint of the wire to achieve the purpose of fixing the joint of the wire. At the same time, rotating the bolt 15 along the outward-expanded threaded tube 14 can cause the outward-expanded threaded tube 14 to contract, thereby achieving the purpose of fixing the two wires to the first terminal 1 and the second terminal 2 respectively. By fixing the wires twice, the tightness of the connection between the wires and the first terminal 1 and the second terminal 2 can be increased. At the same time, when the wires are passed into the first terminal 1 and the second terminal 2, the wires will also pass through the rubber ring 16. The elasticity of the rubber ring 16 can fit tightly to the outer surface of the wire, thereby increasing the sealing of the entire terminal.

[0045] After the wire is fixed, rotate the first telescopic rod 23 so that the first block 2331 is on the side of the first groove 111 and corresponds to the first groove 111. Release 233. Under the action of the first spring 232, 233 slides along the fourth groove 2311, and the second block 2332 slides along the fifth groove 231, further making the first block 2331 slide to the inner surface of the first groove 111, further increasing the tightness of the connection between the first terminal 1 and the second terminal 2.

[0046] When a single wire end needs to be connected, first allow the wire to pass through the outward-expanding threaded tube 14 into the inner cavity of the second terminal 2, then pull the two slide bars 265, at this time the sealing plate 27 slides along the seventh groove 261, and at the same time the sealing plate 27 squeezes the second spring 263, the second spring 263 shrinks to the inner cavity of the eighth groove 262, the sealing block 271 slides to the inner surface of the sealing groove 267 and the sealing block 271 is fully engaged and sealed with the sealing groove 267, at this time release the slide bar 265, under the action of the third spring 264, the slide bar 265 passes through the ninth groove 266 and the limiting hole 272, further fixing the sealing plate 27, thereby realizing the sealing of the single wire end.

[0047] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A combined electrical secondary terminal sealing device, comprising a first terminal (1), one end of the first terminal (1) being movably connected to a second terminal (2); Its characteristics are: One end of the second terminal (2) is fixedly connected to a sleeve (21), the first terminal (1) is slidably mounted on the inner surface of the sleeve (21), one end of each of the first terminal (1) and the second terminal (2) is fixedly mounted with an outward-expanding threaded tube (14), one end of each of the outward-expanding threaded tube (14) is fixedly mounted with a baffle (141), the outer surfaces of each of the first terminal (1) and the second terminal (2) are slidably mounted with a bolt (15), the bolt (15) is threadedly mounted on the outer surface of the outward-expanding threaded tube (14), the first terminal (1) is slidably mounted on the inner surface of the sleeve (21), and the inner surfaces of each of the first terminal (1) and the second terminal (2) are fixedly mounted with a rubber ring (16).

2. The combined electrical secondary terminal sealing device according to claim 1, characterized in that: Two fixing blocks (11) are fixedly mounted on the outer surface of the first terminal (1), a first groove (111) is provided on one side of the fixing block (11), two second grooves (12) are evenly provided on the outer surface of the first terminal (1), and two limiting blocks (13) are evenly fixedly mounted on the outer surface of the first terminal (1).

3. The combined electrical secondary terminal sealing device according to claim 2, characterized in that: The outward-expanding threaded tube (14) and the rubber ring (16) are both funnel-shaped; the end of the outward-expanding threaded tube (14) with a smaller diameter is fixedly connected to the first terminal (1) and the second terminal (2); and the end of the rubber ring (16) with a larger diameter is close to the outward-expanding threaded tube (14).

4. The combined electrical secondary terminal sealing device according to claim 3, characterized in that: The inner surface of the sleeve (21) is provided with two third grooves (211), the outer surface of the sleeve (21) is fixedly installed with two first connecting blocks (22), the middle part of the first connecting block (22) is rotatably installed with a first telescopic rod (23), one side of the first telescopic rod (23) is provided with a fourth groove (2311), the inner surface of the fourth groove (2311) is provided with a fifth groove (231), the inner surface of the fourth groove (2311) is slidably installed with (233), and one end of the (233) is fixedly connected with a first clamping block (2331).

5. The combined electrical secondary terminal sealing device according to claim 4, characterized in that: A second clamping block (2332) is fixedly mounted on one end of the (233), and the second clamping block (2332) is slidably mounted on the inner surface of the fifth groove (231). One end of the second clamping block (2332) is fixedly connected to a first spring (232), and the first spring (232) is fixedly mounted on the inner surface of the fifth groove (231).

6. The combined electrical secondary terminal sealing device according to claim 5, characterized in that: The limiting block (13) is slidably mounted on the inner surface of the third groove (211), and the first clamping block (2331) is movably mounted on the inner surface of the first groove (111). Both the first groove (111) and the first clamping block (2331) are chamfered.

7. The combined electrical secondary terminal sealing device according to claim 6, characterized in that: The outer surface of the sleeve (21) is provided with a sixth groove (212), a second connecting block (24) is fixedly mounted on one side of the sixth groove (212), the second connecting block (24) is fixedly mounted on the outer surface of the sleeve (21), a threaded groove (241) is provided on one side of the second connecting block (24), a screw rod (25) is threadedly mounted on the inner surface of the threaded groove (241), a fixing ball (251) is fixedly mounted on one end of the screw rod (25), and the fixing ball (251) is slidably mounted on the inner surface of the sixth groove (212) and the second groove (12).

8. The combined electrical secondary terminal sealing device according to claim 7, characterized in that: A third connecting block (26) is fixedly mounted on the outer surface of the second terminal (2), a seventh groove (261) is provided on one side of the third connecting block (26), two eighth grooves (262) are provided on the inner surface of the seventh groove (261), a second spring (263) is fixedly mounted on the inner surface of the eighth groove (262), a sealing plate (27) is fixedly connected to the top of the two second springs (263), the sealing plate (27) is slidably mounted on the inner surface of the seventh groove (261), and a ninth groove is provided on both sides of the third connecting block (26). (266), a slide rod (265) is slidably installed on the inner surface of the ninth groove (266), a third spring (264) is wound and installed on the outer surface of the slide rod (265), the slide rod (265) is slidably installed on the inner surface of the limiting hole (272), limiting holes (272) are provided on both sides of the sealing plate (27), two sealing grooves (267) are provided on one side of the third connecting block (26), sealing blocks (271) are fixedly installed on both sides of the sealing plate (27), and the sealing blocks (271) are movably installed on the inner surface of the sealing groove (267).

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