Terminal plastic insulation sleeve

Abstract

The utility model relates to the technical field of plastic insulation sleeves, in particular to a terminal plastic insulation sleeve, which comprises an insulation sleeve, an inner sleeve and an outer sleeve, the middle of the outer surface of the insulation sleeve is fixedly connected with a coating layer, the two ends of the insulation sleeve are provided with avoiding grooves, the avoiding grooves penetrate through the outer surface of the insulation sleeve, and the avoiding grooves extend from one end of the insulation sleeve to the coating layer. The rubber sleeve is arranged on the outer surface of the insulation sleeve, the two ends of the insulation sleeve are provided with binding blocks, the binding blocks are fixedly connected to the outer surface of the insulation sleeve and are of a conical structure, and the inner surfaces of the two ends of the insulation sleeve are both provided with tooth-shaped protrusions, and the two ends of the insulation sleeve shrink under the pressure of the rubber sleeve, so that the tooth-shaped protrusions at the two ends of the inner wall of the insulation sleeve are tightly attached to the outer surface of a cable; the two ends of the insulating sleeve are further extruded by the two ends of the inner sleeve, so that the friction force between the tooth-shaped protrusions and the outer surface of the cable is further increased, the acting force between the cable and the insulating sleeve is increased, the connecting position is more difficult to loosen, and the service life of the line is prolonged.

Description

Technical Field

[0001] The utility model relates to a plastic insulating sleeve, in particular to a terminal plastic insulating sleeve, belonging to the technical field of plastic insulating sleeves. Background Art

[0002] A terminal insulating sleeve is a protective component used to wrap the outside of a terminal. In the internal wiring of various electrical devices, terminal insulating sleeves are widely used to ensure that no accidents occur due to mutual contact between various lines. The intermediate connecting pipe cold-pressed terminal is a component widely used in electrical connections and is often used to connect two cables linearly.

[0003] The terminal insulating sleeve only plays an insulating role on the outer surface of the terminal. When the intermediate connecting pipe cold-pressed terminal is used, the terminal is directly pressed against the wire. During use, when the wire is in a vibrating environment for a long time or is accidentally pulled, the connection between the terminal and the wire will become loose. During long-term use, the connection will gradually become loose, resulting in poor contact at the connection and problems with the line.

[0004] Therefore, it is urgent to improve the terminal plastic insulating sleeve to solve the above existing problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a terminal plastic insulating sleeve. Through the shrinkage of both ends of the insulating sleeve under the pressure of the rubber sleeve, the tooth-shaped protrusions at both ends of the inner wall of the insulating sleeve are closely attached to the outer surface of the cable. Then, through the further extrusion of both ends of the inner sleeve on both ends of the insulating sleeve, the friction force between the tooth-shaped protrusions and the outer surface of the cable is further increased. Finally, through the extrusion of the outer sleeve on the convergence block, both ends of the insulating sleeve are further locked with the cable, so as to increase the acting force between the cable and the insulating sleeve. When the wire is vibrated or affected by external forces, it first acts on the insulating sleeve to protect the connection between the terminal and the wire, so that the connection is more difficult to loosen and the service life of the line is extended.

[0006] In order to achieve the above purpose, the main technical solutions adopted by the utility model include: an insulating sleeve, an inner sleeve, and an outer sleeve threadedly connected to both ends of the inner sleeve. It is characterized in that: a coating layer is fixedly connected to the middle of the outer surface of the insulating sleeve. Avoidance grooves are provided at both ends of the insulating sleeve. Convergence blocks are provided at both ends of the insulating sleeve. The convergence blocks are fixedly connected to the outer surface of the insulating sleeve and the convergence blocks are of a conical structure. Tooth-shaped protrusions are provided on the inner surfaces of both ends of the insulating sleeve. Rubber sleeves are sleeved on the outer surfaces of both ends of the insulating sleeve near the convergence blocks. The inner sleeve is sleeved on the outer surface of the insulating sleeve, and both ends of the inner sleeve are in contact with the outer surfaces of the rubber sleeves.

[0007] Preferably, the avoidance groove penetrates the outer surface of the insulating sleeve, and the avoidance groove extends from one end of the insulating sleeve to the coating layer.

[0008] Preferably, the inner sleeve includes an inner left sleeve and an inner right sleeve, the inner left sleeve and the inner right sleeve are used to wrap the insulating sleeve, a positioning groove is provided on the contact surface between the inner left sleeve and the inner right sleeve, a positioning post corresponding to the positioning groove is provided on the contact surface between the inner right sleeve and the inner left sleeve, and the inner left sleeve and the inner right sleeve are connected by screws.

[0009] Preferably, an external thread is provided on the outer surface of the inner sleeve, an internal thread is provided on the inner surface of the outer sleeve, the outer sleeve and the inner sleeve are threadedly connected through the external thread and the internal thread, a converging port is provided at one end of the outer sleeve away from the inner sleeve, and the inner surface of the converging port is of a conical structure.

[0010] Preferably, the length of the rubber sleeve is less than the length of the avoidance groove.

[0011] Preferably, the insulating sleeve is a nylon insulating sleeve.

[0012] Preferably, the coating layer is silicone rubber.

[0013] The utility model at least has the following beneficial effects:

[0014] 1. By the contraction of both ends of the insulating sleeve under the pressure of the rubber sleeve, the tooth-shaped protrusions at both ends of the inner wall of the insulating sleeve are closely attached to the outer surface of the cable. Then, by further squeezing both ends of the insulating sleeve by the inner sleeve, the friction between the tooth-shaped protrusions and the outer surface of the cable is further increased. Finally, by squeezing the converging block by the outer sleeve, both ends of the insulating sleeve are further locked with the cable, so that the acting force between the cable and the insulating sleeve is increased. When the wire is vibrated or affected by an external force, it first acts on the insulating sleeve to protect the connection between the terminal and the wire, so that the connection is more difficult to loosen and the service life of the circuit is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0016] Figure 1 is an isometric structural schematic diagram of the disassembled state provided by the utility model;

[0017] Figure 2 is an isometric structural schematic diagram after installation provided by the utility model;

[0018] Figure 3 is a cross-sectional view provided by the utility model;

[0019] Figure 4 is a partial isometric structural schematic diagram provided by the utility model;

[0020] In the figure, 1 is an insulating sleeve; 2 is an inner sleeve; 3 is an outer sleeve; 4 is a coating layer; 5 is an avoidance groove; 6 is a constriction block; 7 is a tooth-shaped protrusion; 8 is a rubber sleeve; 9 is an external thread; 10 is an internal thread; 11 is an inner left sleeve; 12 is an inner right sleeve; 13 is a positioning groove; 14 is a positioning post; 15 is a constriction opening. Specific embodiments

[0021] The following will elaborate on the embodiments of the present application in conjunction with the accompanying drawings and embodiments, so as to fully understand how the present application uses technical means to solve technical problems and achieve the implementation process of technical effects and implement accordingly.

[0022] As Figures 1-4 shown, the terminal plastic insulating sleeve provided in this embodiment includes an insulating sleeve 1, an inner sleeve 2, and an outer sleeve 3 threadedly connected to both ends of the inner sleeve 2. A coating layer 4 is fixedly connected to the middle of the outer surface of the insulating sleeve 1. Avoidance grooves 5 are provided at both ends of the insulating sleeve 1, and the avoidance grooves 5 penetrate the outer surface of the insulating sleeve 1 and extend from one end of the insulating sleeve 1 to the coating layer 4. Constriction blocks 6 are provided at both ends of the insulating sleeve 1, and the constriction blocks 6 are fixedly connected to the outer surface of the insulating sleeve 1 and the constriction blocks 6 are of a conical structure. Tooth-shaped protrusions 7 are provided on the inner surfaces at both ends of the insulating sleeve 1. Rubber sleeves 8 are sleeved on the outer surface of the insulating sleeve 1 at positions near the constriction blocks 6 at both ends. The inner sleeve 2 is sleeved on the outer surface of the insulating sleeve 1, and both ends of the inner sleeve 2 are in contact with the outer surface of the rubber sleeve 8. An external thread 9 is provided on the outer surface of the inner sleeve 2, and an internal thread 10 is provided on the inner surface of the outer sleeve 3. Before wiring, two outer sleeves 3, two rubber sleeves 8, and the insulating sleeve 1 are sleeved on the cable, and then the wiring part is pressed tightly with a terminal. The insulating sleeve 1 is moved directly above the terminal, and the rubber sleeves 8 are moved to both ends of the insulating terminal. The rubber sleeves 8 are made of an elastic material, and the inner diameter of the rubber sleeves 8 in the contracted state is smaller than the outer diameter of the insulating sleeve 1. The width of the rubber sleeves 8 is smaller than the length of the avoidance grooves 5. Both ends of the insulating sleeve 1 contract under the pressure of the rubber sleeves 8, so that the tooth-shaped protrusions 7 at both ends of the inner wall of the insulating sleeve 1 closely adhere to the outer surface of the cable.

[0023] Furthermore, as Figure 1 and Figure 3As shown, the inner sleeve 2 includes an inner left sleeve 11 and an inner right sleeve 12. The inner left sleeve 11 and the inner right sleeve 12 are sleeved on the outside of the insulating sleeve 1 from both sides of the insulating sleeve 1. A positioning groove 13 is provided on the contact surface between the inner left sleeve 11 and the inner right sleeve 12, and a positioning post 14 corresponding to the positioning groove 13 is provided on the contact surface between the inner left sleeve 11 and the inner right sleeve 12. The inner left sleeve 11 and the inner right sleeve 12 are connected by screws. The inner left sleeve 11 and the inner right sleeve 12 are clamped on the outside of the insulating sleeve 1 from the side of the insulating sleeve 1, so that both ends of the inner sleeve 2 are respectively clamped on the outer surfaces of the two rubber sleeves 8. The inner left sleeve 11 and the inner right sleeve 12 are pressed tightly so that the positioning post 14 is inserted into the positioning groove 13, and then the inner left sleeve 11 and the inner right sleeve 12 are connected by screws. At this time, both ends of the inner sleeve 2 further squeeze both ends of the insulating sleeve 1, so that the frictional force between the tooth-shaped protrusions 7 and the outer surface of the cable is further increased.

[0024] Furthermore, as Figure 3 shown, the outer sleeve is threadedly connected to the inner sleeve 2 from both ends of the inner sleeve 2. One end of the outer sleeve 3 away from the inner sleeve 2 is provided with a converging port 15. The inner surface of the converging port 15 is a conical structure. Both the converging port 15 and the converging block 6 are conical structures. When the outer sleeve 3 is screwed inward, the converging port 15 squeezes the converging block 6 to further lock the insulating sleeve 1 and the cable.

[0025] Among them, as Figure 1 and Figure 3 shown, the coating layer 4 is made of silicone rubber. When in the unused state, both ends of the coating layer 4 are folded over the outer surface of the coating layer 4. After the rubber sleeves 8 are installed at both ends of the insulating sleeve 1, both ends of the coating layer 4 are turned to the outer surface of the insulating sleeve 1, so that both ends of the coating layer 4 are closely attached to the insulating sleeve 1.

[0026] Among them, as Figure 1 and Figure 4 described, the insulating sleeve is a nylon insulating sleeve, which has a certain mechanical strength while having high-strength insulation.

[0027] As Figures 1-4As shown in the figure, the principle of the terminal plastic insulating sleeve provided in this embodiment is as follows: Before wiring, put two outer sleeves 3, two rubber sleeves 8, and the insulating sleeve 1 on the cable. Then, press the wiring part with the terminal, move the insulating sleeve 1 directly above the terminal, and move the rubber sleeves 8 to both ends of the insulating terminal. The rubber sleeve 8 is made of elastic material, and the inner diameter of the rubber sleeve 8 in the contracted state is smaller than the outer diameter of the insulating sleeve 1. The width of the rubber sleeve 8 is smaller than the length of the avoidance groove 5. Under the pressure of the rubber sleeves 8, both ends of the insulating sleeve 1 shrink, so that the tooth-shaped protrusions 7 at both ends of the inner wall of the insulating sleeve 1 closely adhere to the outer surface of the cable. The coating layer 4 is made of silicone rubber. In the unused state, both ends of the coating layer 4 are folded over the outer surface of the coating layer 4. After the rubber sleeves 8 are installed at both ends of the insulating sleeve 1, turn both ends of the coating layer 4 to the outer surface of the insulating sleeve 1, so that both ends of the coating layer 4 are closely attached to the insulating sleeve 1. The contact surface between the inner left sleeve 11 and the inner right sleeve 12 is provided with a positioning groove 13, and the contact surface between the inner left sleeve 11 and the inner right sleeve 12 is provided with a positioning post 14 corresponding to the positioning groove 13. The inner left sleeve 11 and the inner right sleeve 12 are connected by screws. Clamp the inner left sleeve 11 and the inner right sleeve 12 to the outside of the insulating sleeve 1 from the side of the insulating sleeve 1, so that both ends of the inner sleeve 2 are respectively clamped on the outer surfaces of the two rubber sleeves 8. Press the inner left sleeve 11 and the inner right sleeve 12 tightly so that the positioning post 14 is inserted into the positioning groove 13. Then, connect the inner left sleeve 11 and the inner right sleeve 12 by screws. At this time, both ends of the inner sleeve 2 further squeeze both ends of the insulating sleeve 1, so that the friction between the tooth-shaped protrusions 7 and the outer surface of the cable is further increased. The outer sleeve 3 is threadedly connected to both ends of the inner sleeve 2. Both the constriction port 15 and the constriction block 6 are of a conical structure. When the outer sleeve 3 is tightened inward, the constriction port 15 squeezes the constriction block 6 to further lock the insulating sleeve 1 and the cable.

[0028] As used in the specification and claims, certain terms are used to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in names as a way to distinguish components, but use the difference in the functions of components as the criterion for distinction. As mentioned throughout the specification and claims, "comprising" is an open-ended term, so it should be interpreted as "including but not limited to". "Substantially" means within an acceptable error range. Those skilled in the art can solve technical problems within a certain error range and basically achieve the technical effect.

[0029] It should be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a commodity or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent in such a commodity or system. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the commodity or system including the element.

[0030] The above description shows and describes several preferred embodiments of the present utility model. However, as previously mentioned, it should be understood that the present utility model is not limited to the forms disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the techniques or knowledge in related fields. And any changes and alterations made by those skilled in the art without departing from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. A terminal plastic insulating sleeve, comprising an insulating sleeve (1), an inner sleeve (2), and an outer sleeve (3) threadedly connected to both ends of the inner sleeve (2), characterized in that: A coating layer (4) is fixedly connected to the middle of the outer surface of the insulating sleeve (1), avoidance grooves (5) are provided at both ends of the insulating sleeve (1), and convergence blocks (6) are provided at both ends of the insulating sleeve (1). The convergence blocks (6) are fixedly connected to the outer surface of the insulating sleeve (1) and are of a conical structure. Tooth-shaped protrusions (7) are provided on the inner surfaces of both ends of the insulating sleeve (1), and rubber sleeves (8) are provided at positions close to the convergence blocks (6) at both ends of the outer surface of the insulating sleeve (1). The inner sleeve (2) is sleeved on the outer surface of the insulating sleeve (1), and both ends of the inner sleeve (2) are in contact with the outer surface of the rubber sleeve (8).

2. A terminal plastic insulating sleeve according to claim 1, characterized in that: The avoidance groove (5) passes through the outer surface of the insulating sleeve (1), and the avoidance groove (5) extends from one end of the insulating sleeve (1) to the coating layer (4).

3. The terminal plastic insulating sleeve according to claim 1, characterized in that: The inner sleeve (2) comprises an inner left sleeve (11) and an inner right sleeve (12), wherein the inner left sleeve (11) and the inner right sleeve (12) are used to wrap the insulating sleeve (1), a contact surface between the inner left sleeve (11) and the inner right sleeve (12) is provided with a positioning groove (13), and a contact surface between the inner right sleeve (12) and the inner left sleeve (11) is provided with a positioning column (14) corresponding to the positioning groove (13), and the inner left sleeve (11) and the inner right sleeve (12) are connected by screws.

4. The terminal plastic insulating sleeve according to claim 1, characterized in that: The outer surface of the inner sleeve (2) is provided with an external thread (9), and the inner surface of the outer sleeve (3) is provided with an internal thread (10). The outer sleeve (3) and the inner sleeve (2) are threadedly connected via the external thread (9) and the internal thread (10). The end of the outer sleeve (3) away from the inner sleeve (2) is provided with a conical opening (15), and the inner surface of the conical opening (15) is a conical structure.

5. The terminal plastic insulating sleeve according to claim 1, characterized in that: The length of the rubber sleeve (8) is smaller than the length of the avoidance groove (5).

6. The terminal plastic insulating sleeve according to claim 1, characterized in that: The insulating sleeve (1) is a nylon insulating sleeve.

7. The terminal plastic insulating sleeve according to claim 1, characterized in that: The coating layer (4) is silicone rubber.

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