A waterproof cable joint

Abstract

The utility model provides a waterproof cable joint, including the medium body, sealing ring and the compression nut, the inner chamber of sealing ring is provided with the shaped part, is formed with a plurality of along its circumferential interval distribution and is used for the wire of cable to pass through the perforation on the shaped part, has the cladding structure of reducing the space that the perforation exhibits and being extruded deformable in the perforation, the space that the perforation exhibits is adaptive to the volume of the wire of cable through the deformation of cladding structure when the wire of cable passes through. The utility model has the advantages of realizing one wire one hole setting when the wire of cable passes through the sealing ring, realizing the sealed connection of the inside of perforation and the wire through the cladding structure, avoiding the generation of gap, and the cladding structure has the self -adaptation ability, can make the inside diameter of perforation also exhibit the inside diameter that adapts to it according to the outside diameter of wire, and then makes waterproof dustproof effect increase.

Description

Technical Field

[0001] This utility model relates to the field of cable fittings technology, and in particular to a waterproof cable connector. Background Technology

[0002] Waterproof cable connectors are widely used for securing and protecting electrical wires and cables in mechanical equipment, marine electrical systems, and corrosion-resistant equipment. They are used to lock and secure incoming and outgoing cables, providing waterproofing, dustproofing, and vibration protection.

[0003] Currently, it is common practice to twist multiple wires of a cable into a spiral shape, pass them through a waterproof cable joint, and seal them with a sealing ring in wiring applications such as explosion-proof hoses and waterproof cable joints. Although this method is simple and direct, it has drawbacks. The spiral shape results in an irregular circular outer contour, while the inner circle of the sealing ring is a regular circle. When pressed tightly onto the spiral wire bundle, some small gaps will be created, making it impossible to achieve a complete seal. This may not cause problems in the short term, but in the long term, under conditions of temperature changes and vibration, moisture will slowly seep into the equipment through the gaps between the wires, causing internal components to become damp, corroded, and have reduced insulation, or even short circuits. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing a waterproof cable connector to solve the aforementioned problems.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This waterproof cable connector includes a middle connector, a sealing ring, and a clamping nut. One end face of the middle connector has a sealing clamp arranged in a ring shape, and a limiting groove with a stepped configuration is also formed on the end face. An assembly space for placing the sealing ring is formed between the limiting groove and the sealing clamp. The rear end of the sealing ring is inserted into the limiting groove. The clamping nut squeezes the sealing clamp to clamp the sealing ring. A forming part is provided in the inner cavity of the sealing ring. A plurality of through holes are formed on the forming part, which are distributed circumferentially and allow the cable conductors to pass through. The through holes have a covering structure that reduces the space exposed by the through holes and is deformable under compression. When the cable conductors pass through, the covering structure deforms so that the space exposed in the through holes adapts to the volume of the cable conductors.

[0006] Further improvements are made by forming the covering structure on the inner circumferential surface of the perforation. It is divided into a moving part and a covering part along the assembly guide. The moving part allows the cable conductor to move quickly to the covering part when it enters the perforation, and no movement resistance is generated during the movement of the conductor. The covering part covers the outer surface of the conductor when the cable conductor passes through it and exits the perforation, and generates movement resistance during the movement of the conductor.

[0007] Further improvements have been made to the encapsulation structure, which gradually reduces the gap between the perforation and the cable conductors along the assembly guide.

[0008] To further improve the design, a ring-shaped abutment protrusion is formed on the end face of the sealing ring near the limiting groove, which fits against the stepped surface of the limiting groove.

[0009] Further improvements include the addition of an elastic element placed within a limiting groove on the outer sleeve of the abutting protrusion, which has elastic compression in the tightening direction of the pressure nut. The elastic element provides support for the sealing ring so that the sealing ring remains in contact with the pressure nut.

[0010] Further improvements were made, and the elastic element was set as a wave spring.

[0011] The beneficial effects of this utility model are:

[0012] This invention enables the cable conductor to achieve a one-line-one-hole configuration when passing through the sealing ring. The inside of the hole is sealed to the conductor through a covering structure, avoiding gaps. Furthermore, the covering structure has self-adaptive capabilities, allowing the inner diameter of the hole to match the outer diameter of the conductor, thereby increasing the waterproof and dustproof effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the full cross-section of the present invention;

[0015] Figure 3 This is a schematic diagram of the usage state of this utility model, showing the state changes of the hole when a wire passes through it. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] Referring to the attached drawings: This type of waterproof cable connector includes a center connector 1, a sealing ring 2, and a clamping nut 3. One end face of the center connector 1 has a sealing clamp 11 arranged in an annular shape, and a step-shaped limiting groove 12 is also formed on the end face. An assembly space for the sealing ring 2 is formed between the limiting groove 12 and the sealing clamp. The rear end of the sealing ring 2 is inserted into the limiting groove 12. The clamping nut 3 squeezes the sealing clamp 11 to clamp the sealing ring 2. A forming part 21 is provided in the inner cavity of the sealing ring 2. A plurality of through holes 211 are formed on the forming part 21, which are distributed circumferentially and allow the cable conductors to pass through. The through holes 211 have a covering structure 4 that reduces the space exposed by the through holes 211 and is deformable under compression. When the cable conductors pass through, the covering structure 4 deforms so that the space exposed in the through holes 211 adapts to the volume of the cable conductors. The principle of this utility model is that when the clamping nut 3 is tightened clockwise to connect with the threaded connection of the middle connector 1, the inclined sealing teeth constituting the sealing clamp 11 come into close contact with each other, thereby reducing their own diameter and clamping the sealing ring 2. After clamping, the sealing ring 2 is not easily twisted by the tightening force when the clamping nut 3 is tightened. When the cable wire passes through the sealing ring 2, the forming part 21 makes the space for the wire to pass through more concrete, that is, to realize the setting of one wire and one hole. The hole 211 has a covering structure 4 inside. 4 ensures a sealed connection between the wire and the perforation 211 after the wire passes through, preventing gaps. The covering structure 4 is self-adaptive, allowing the inner diameter of the perforation 211 to match the outer diameter of the wire. The sealing ring 2 is made of rubber and has a certain elasticity. When compressed, the elasticity generates a self-restoring force. However, due to the presence of the wire, this self-restoring force cannot return to its initial state. Therefore, the self-restoring force enhances the sealing performance between the wire and the perforation 211, thereby increasing the waterproof and dustproof effect.

[0018] The covering structure 4 is formed on the inner circumferential surface of the perforation 211. It is divided into a moving part 41 and a covering part 42 along the assembly guide. The moving part 41 allows the cable conductor to move quickly to the covering part 42 after entering the perforation 211, without generating movement resistance during the conductor's movement. The covering part 42 covers the outer surface of the cable conductor as it passes through and exits the perforation 211, generating movement resistance during the conductor's movement. The covering structure 4 is actually part of the perforation 211, and it is formed together with the sealing ring 2 during injection molding, thus simplifying the structural complexity. It consists of two parts: a moving part 41, which has a clearance fit with the conductor, and a covering part 42, which has a tight fit with the conductor (the tightness generated by this tight fit is mainly to ensure sealing, but will not hinder the movement of the conductor). The tight fit comes from the fact that the covering part 42 will be squeezed and deformed when it comes into contact with the conductor to adapt to the outer diameter of the conductor, thereby eliminating gaps. This is also to take into account that deformation of the entire section will affect the smoothness of the conductor's movement within the through hole 211, so a partial clearance fit and a partial tight fit are adopted.

[0019] The covering structure 4 makes the gap between the perforation 211 and the cable conductor gradually decrease along the assembly guide. This setting makes the change of the hole diameter linear, that is, the inner diameter is larger than the outer diameter of the conductor. This results in the moving part 41, which allows the conductor to quickly enter the perforation 211 and avoids the phenomenon of jamming during the entry stage.

[0020] A ring-shaped abutment protrusion 22 is formed on the end face of the sealing ring 2 near the limiting groove 12, which fits against the stepped surface of the limiting groove 12. This arrangement takes into account that the stepped surface of the limiting groove 12 is inclined. Therefore, the additional and specifically configured abutment protrusion 22 achieves contact with the inclined stepped surface. This ensures the contact area between the sealing ring 2 and the limiting groove 12 without excessively compressing the sealing ring 2.

[0021] An elastic element 5 is fitted around the abutment protrusion 22 and is placed within the limiting groove 12, exhibiting elastic compression in the tightening direction of the clamping nut 3. The elastic element 5 provides support for the sealing ring 2, ensuring it remains in contact with the clamping nut 3. The stepped surface of the limiting groove 12, where the abutment protrusion 22 does not completely occupy the entire groove, provides space for the elastic element 5. The elastic element 5 primarily serves a supporting function, achieving contact with the sealing ring 2. It is bonded to the sealing ring 2. When the sealing ring 2 does not expand, the elastic element 5 is in a stress-free state, thus limiting the sealing ring 2. The expansion of the cable conductor due to heat causes it to lengthen, while the contraction due to low temperatures causes it to shorten. The bonding process causes the length of the sealing ring 2 to change, which directly affects the elastic element. At the same time, the deformation range of the elastic element 5 is related to the strength of the applied force. It is not possible to cause the elastic element 5 to deform significantly with just a slight force. Moreover, since the sealing ring 2 is made of rubber, the applied force cannot cause the elastic element 5 to deform significantly. Thus, under the tension of bonding, the deformation range of the sealing ring 2 during thermal expansion or contraction can be reduced, thereby extending the service life of the sealing ring 2 and ensuring the sealing performance.

[0022] The elastic element 5 is set as a spring. The force required to drive the spring to deform is relatively strong. This is related to the shear modulus of the spring. The greater the shear modulus of the material, the greater the force required for the spring. Therefore, the force generated by the sealing ring 2 cannot cause the elastic element 5 to deform significantly. Thus, under the tension of the adhesive, the deformation range of the sealing ring 2 during thermal expansion or contraction can be reduced, thereby extending the service life of the sealing ring 2 and ensuring the sealing performance.

[0023] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A waterproof cable connector, comprising a center connector (1), a sealing ring (2), and a clamping nut (3), wherein one end face of the center connector (1) has a sealing clamp (11) arranged in an annular shape, and a step-shaped limiting groove (12) is also formed on the end face, wherein an assembly space for the sealing ring (2) is formed between the limiting groove (12) and the sealing clamp, the rear end of the sealing ring (2) is inserted into the limiting groove (12), and the clamping nut (3) presses the sealing clamp (11) to clamp the sealing ring (2), characterized in that: The inner cavity of the sealing ring (2) is provided with a forming part (21), and a plurality of perforations (211) are formed on the forming part (21) and are spaced apart along its circumference for the cable conductors to pass through. The perforations (211) have a covering structure (4) that reduces the space shown by the perforations (211) and is deformable under compression. When the cable conductors pass through, the covering structure (4) deforms so that the space shown in the perforations (211) adapts to the volume of the cable conductors.

2. The waterproof cable connector according to claim 1, characterized in that: The covering structure (4) is formed on the inner circumferential surface of the perforation (211), and is divided into a moving part (41) and a covering part (42) along the assembly guide. The moving part (41) allows the cable conductor to move quickly to the covering part (42) when it enters the perforation (211) and does not generate movement resistance during the movement of the conductor. The covering part (42) covers the outer surface of the conductor when the cable conductor passes through it and exits the perforation (211) and generates movement resistance during the movement of the conductor.

3. The waterproof cable connector according to claim 2, characterized in that: The covering structure (4) causes the gap between the perforation (211) and the cable conductor to gradually decrease along the assembly guide.

4. The waterproof cable connector according to claim 1, characterized in that: The sealing ring (2) has an abutting protrusion (22) formed on the end face near the limiting groove (12) in a ring shape and in contact with the stepped surface of the limiting groove (12).

5. The waterproof cable connector according to claim 4, characterized in that: The abutting protrusion (22) is fitted with an elastic element (5) placed in the limiting groove (12) and having elastic compression in the tightening direction of the clamping nut (3). The elastic element (5) provides support for the sealing ring (2) so that the sealing ring (2) remains in contact with the clamping nut (3).

6. The waterproof cable connector according to claim 5, characterized in that: The elastic element (5) is configured as a spring.

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