A clamping cable connector

Abstract

A clamping cable connector includes an intermediate connecting body, a clamping nut threaded to the intermediate connecting body and located at both ends, and an inlet connector. Sealing rings are provided between the clamping nut and the intermediate connecting body, and between the inlet connector and the intermediate connecting body. Two sealing protrusions are formed on the inner circumference of the sealing rings, arranged in a ring and spaced apart. When a cable conductor passes through, the sealing protrusions deform under the pressure of the conductor, allowing them to fill the gap between the sealing ring and the conductor after deformation. A space for filling grease is provided between adjacent sealing protrusions through a spacing. The beneficial effect of this invention is that the sealing protrusions formed in the inner cavity of the sealing ring are relatively thin, resulting in greater relative strain (deformation rate) and more significant shape change under compressive force. This allows for better filling of the gap generated when the conductor passes through the sealing ring, thereby increasing the waterproof and dustproof effect.

Description

Technical Field

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

[0002] Cable connectors are a type of accessory for cables, widely used in the fixing and protection of wires and cables in mechanical equipment, marine electrical systems, and corrosion-resistant equipment. They can provide functions such as dustproofing, waterproofing, preventing loosening, and shielding.

[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 clamping 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 clamping cable connector includes an intermediate connecting body, a clamping nut and an inlet connector that are threadedly connected to the intermediate connecting body and are respectively disposed at both ends. A sealing ring is provided between the clamping nut and the intermediate connecting body, and between the inlet connector and the intermediate connecting body. Two sealing protrusions are formed on the inner circumferential surface of the sealing ring, which are arranged in a ring and distributed at intervals. When the cable conductor passes through, the sealing protrusion is deformed by the pressure of the conductor, and is allowed to fill the gap between the sealing ring and the conductor after deformation. The two adjacent sealing protrusions are separated by a gap to obtain a filling space for filling grease.

[0006] Further improvements include an outer oblique-shaped stop surface and an inner oblique-shaped stop surface that forms an angle with the outer oblique-shaped stop surface. The outer oblique-shaped stop surface forms an angle with the inner circumferential surface of the sealing ring, and the inner oblique-shaped stop surface forms an angle with the inner circumferential surface of the sealing ring. Adjacent inner oblique-shaped stop surfaces form an angle and a filling space for filling grease is provided.

[0007] Further improvements were made, with the angle between the outer retaining surface and the inner circumferential surface of the sealing ring being greater than the angle between the inner retaining surface and the inner circumferential surface of the sealing ring.

[0008] To further improve the design, mounting grooves arranged in a ring are provided on both end faces of the sealing ring. These mounting grooves are used to accommodate clips that fit the position of the sealing protrusion.

[0009] Further improvements include a guide section and a snap-fit ​​section in the mounting groove. The guide section has a side opening on the end face of the sealing ring, while the snap-fit ​​section has a snap-fit ​​space inside the sealing ring for the snap-fit ​​component to be placed inside.

[0010] Further improvements include an inclined bottom surface formed by the guide section on the sealing ring.

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

[0012] 1. The present invention reduces the inner diameter of the sealing ring by forming a sealing protrusion inside the sealing ring, and the sealing protrusion itself is thinner, so that it will generate a larger relative strain (deformation rate) and a more significant shape change when subjected to extrusion pressure. This can better fill the gap generated when the wire passes through the sealing ring, thereby increasing the waterproof and dustproof effect.

[0013] 2. This utility model can also provide additional filling space for filling with grease. The grease plays a lubricating role, that is, when the wire passes through, the grease can reduce the relative resistance when the wire contacts the sealing protrusion, thereby increasing the wire passing efficiency. Moreover, the sealing ring is made of fluororubber, which can appropriately absorb the oil in the grease and cause the volume to expand appropriately. Appropriate expansion is beneficial to increasing the sealing effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the full cross-section of the present invention. Detailed Implementation

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

[0017] Referring to the attached diagram: This clamping cable connector includes an intermediate connector 1, a clamping nut 2 threaded to the intermediate connector 1 and located at both ends, and an inlet connector 3. A sealing ring 4 is provided between the clamping nut 2 and the intermediate connector 1, and between the inlet connector 3 and the intermediate connector 1. Two sealing protrusions 41 are formed on the inner circumferential surface of the sealing ring 4, arranged in a ring and spaced apart. The sealing protrusions 41 are deformed by the pressure of the cable conductor when the conductor passes through, and are allowed to fill the gap between the sealing ring 4 and the conductor after deformation. A filling space 5 for filling grease is obtained between two adjacent sealing protrusions 41 through the separation spacing. The principle of this invention lies in the fact that the sealing protrusion 41 is an additional protrusion of the sealing ring 4, which gives the inner cavity of the sealing ring 4 two inner diameter dimensions (one dimension shown by the sealing protrusion 41 and one dimension shown by the inner circumferential surface). Because the inner diameter of the wire is fixed (whether multiple wires are twisted together or simply assembled), the wire can contact the sealing protrusion 41 and the inner circumferential surface of the sealing ring 4 after entering the inner cavity of the sealing ring 4. Moreover, the thickness of the sealing protrusion 41 is thinner than the thickness of the sealing ring 4, so under the same compressive force, the sealing protrusion 41 will produce... The larger relative strain (deformation rate) and more significant shape change allow for better filling of the gaps created when the wire passes through the sealing ring 4, thereby increasing the waterproof and dustproof effect. It also provides additional filling space 5 for filling grease, which acts as a lubricant. When the wire passes through, the grease can reduce the relative resistance when the wire contacts the sealing protrusion 41, thereby increasing the wire threading efficiency. Moreover, the sealing ring 4 is made of fluororubber, which can appropriately absorb the oil in the grease and expand its volume appropriately. Appropriate expansion is beneficial to increasing the sealing effect.

[0018] The sealing protrusion 41 has an outer oblique-shaped stop surface 411 and an inner oblique-shaped stop surface 412 that forms an angle with the outer oblique-shaped stop surface 411. The outer oblique-shaped stop surface 411 forms an angle with the inner circumferential surface of the sealing ring 4, and the inner oblique-shaped stop surface 412 forms an angle with the inner circumferential surface of the sealing ring 4. This arrangement makes the sealing protrusion 41 triangular in shape. The triangular shape can limit the deformation of the sealing protrusion 41. In particular, when the wire passes through, the sealing protrusion 41 will not undergo large-scale lateral sway deformation under the influence of relative resistance in the direction of movement. Instead, it will undergo deformation that expands to both sides when squeezed. The expansion to both sides transforms the original triangular shape into a trapezoidal shape, and the contact surface that contacts the wire changes from a sharp end to an irregular flat end. In this way, the gap generated when the wire passes through the sealing ring 4 is filled, achieving a complete seal.

[0019] The angle between the outer stop surface 411 and the inner circumferential surface of the sealing ring 4 is greater than the angle between the inner stop surface 412 and the inner circumferential surface of the sealing ring 4. This arrangement causes the triangular structure of the sealing protrusion 41 to tilt inward. When the wire is subjected to relative resistance in the direction of movement and undergoes yaw deformation, the angles at the two positions become nearly identical. That is, the angle between the outer stop surface 411 and the inner circumferential surface of the sealing ring 4 decreases, while the angle between the inner stop surface 412 and the inner circumferential surface of the sealing ring 4 increases. In other words, the triangular structure tends to deform into an isosceles triangle. This ensures a more solid contact between the irregular planar end of the sealing protrusion 41 after compression deformation and the wire. In this embodiment, the angle between the outer stop surface 411 and the inner circumferential surface of the sealing ring 4 is 145°, and the angle between the inner stop surface 412 and the inner circumferential surface of the sealing ring 4 is 140°.

[0020] Both end faces of the sealing ring 4 are provided with ring-shaped mounting grooves 42. The mounting grooves 42 are used to accommodate retaining members 6 that are adapted to the position of the sealing protrusion 41. The retaining member 6 serves as a protective structure, ensuring that the position of the mounting groove 42 of the retaining member 6 matches the position of the sealing protrusion 41. It provides solid support for the sealing protrusion 41, ensuring that the sealing protrusion 41 maintains its precise shape and size during use. Furthermore, the retaining member 6 can be tightened inwards using dimensional differences, which also helps to increase the contact strength of the sealing protrusion 41 on the wire. In this embodiment, the retaining member 6 is a circular retaining ring.

[0021] The mounting groove 42 has a guide section 421 and a locking section 422. The guide section 421 has a side opening 4211 formed on the end face of the sealing ring 4. The locking section 422 has a locking space 4221 formed in the sealing ring 4 for the locking piece 6 to be placed inside. The guide section 421 plays a guiding role to guide the locking piece 6 to move along the assembly direction and reach the locking section 422. The locking section 422 is used to limit the locking piece 6 in the final assembly position, and this position matches the sealing protrusion 41. Moreover, the configuration between the guide section 421 and the locking section 422 in a planar view is an L-shaped configuration, that is, the locking piece 6 changes direction after entering the locking section 422, and also has an assembly depth. In this way, even if the sealing ring 4 deforms during the service life, the locking piece 6 is difficult to come out of the locking section 422.

[0022] The bottom surface of the guide section 421 formed on the sealing ring 4 is inclined. This is because the inner diameter of the clamping part 6 is small. Therefore, by setting the bottom surface inclined, the inner diameter of the guide section 421 becomes smaller. This reduces the difficulty for the clamping part 6 to enter the guide section 422 and allows it to enter the guide section 421 quickly during the entry stage, eliminating the need for adjustment. However, it is necessary to use auxiliary equipment with stamping function to fully enter the clamping section 422.

[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 clamping cable connector, comprising an intermediate connecting body (1), and a clamping nut (2) threadedly connected to the intermediate connecting body (1) and disposed at both ends, and an inlet connector (3), characterized in that: A sealing ring (4) is provided between the clamping nut (2) and the intermediate connector (1), and between the inlet connector (3) and the intermediate connector (1). Two sealing protrusions (41) are formed on the inner circumferential surface of the sealing ring (4). The sealing protrusions (41) are deformed by the wire when the cable passes through, and are allowed to fill the gap between the sealing ring (4) and the wire after deformation. A filling space (5) for filling grease is obtained between two adjacent sealing protrusions (41) by the separation spacing.

2. The clamping cable connector according to claim 1, characterized in that: The sealing protrusion (41) has an outer oblique-shaped baffle (411) and an inner oblique-shaped baffle (412) that forms an angle with the outer oblique-shaped baffle (411). The outer oblique-shaped baffle (411) has an angle with the inner circumferential surface of the sealing ring (4), and the inner oblique-shaped baffle (412) has an angle with the inner circumferential surface of the sealing ring (4).

3. The clamping cable connector according to claim 2, characterized in that: The angle between the outer side facet (411) and the inner circumferential surface of the sealing ring (4) is greater than the angle between the inner side facet (412) and the inner circumferential surface of the sealing ring (4).

4. The clamping cable connector according to claim 1, characterized in that: The sealing ring (4) has a ring-shaped mounting groove (42) on both end faces. The mounting groove (42) is used to install a clip (6) that is adapted to the position of the sealing protrusion (41).

5. The clamping cable connector according to claim 4, characterized in that: The mounting groove (42) has a guide section (421) and a snap-fit ​​section (422). The guide section (421) has a side opening (4211) formed on the end face of the sealing ring (4). The snap-fit ​​section (422) has a snap-fit ​​space (4221) formed in the sealing ring (4) for the snap-fit ​​member (6) to be placed inside.

6. The clamping cable connector according to claim 5, characterized in that: The bottom surface of the guide section (421) formed on the sealing ring (4) is inclined.

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