Cable lifting structure

Abstract

The present invention provides a cable lifting structure, wherein a main body has a through cavity along the axial direction, and a clamping member and a driving member are arranged in the through cavity; the clamping member and the clamping driving member together form a channel for the cable to pass through; the clamping member has a first pushing surface abutting against the cable on the side facing the channel, and the clamping member has a second pushing surface on the side facing the clamping driving member; the clamping driving member has a pushing matching surface matching with the second pushing surface; when the cable enters the channel from one end of the main body, the cable abuts against the first pushing surface, and the generated pushing force causes the clamping member to open in a direction away from the channel; after the cable passes through the clamping driving member through the channel, the cable and the clamping driving member form a linkage match in the direction opposite to the direction in which the cable enters the main body; when the cable is subjected to a pulling force in the direction opposite to the direction in which the cable enters the main body, the pushing matching surface abuts against the second pushing surface, and the generated pushing force causes the clamping member to close in the direction close to the channel and clamp with the side wall of the cable.

Description

Technical Field

[0001] The invention relates to a cable system, and in particular to a cable fixing device. Background Art

[0002] Proper wire and cable management within a building structure is important to the safe and efficient operation of a building's electrical and cabling services.

[0003] When an electrical wire or cable needs to be protected from potential damage, it can be pulled through various types of conduits. Conduits can be made of metal, rigid plastic (e.g., PVC), and other materials, and the wires and cables can range from very thin wires (which can be bundled together to pass through conduits) to very thick cables (which do not need to be combined with other wires or cables when passing through conduits). For the purposes of this disclosure, the term "cable" or "cabling" refers to any type of wire, cable, or similar elongated component that can be inserted and pulled through a conduit.

[0004] Because conduits can be very long and have bends due to building structural requirements, pulling an electrical cable through even a short length of conduit can be difficult. Traditionally, tools such as an electrician's fish tape have been used to fit over the end of a cable and pull the cable through the conduit. Generally, a fish tape is made of a strong material (e.g., steel) to support the pull load and has a ring at one end for securing the end of the cable. In the event that the cable being pulled is not insulated, or the insulation is stripped from the end secured to the fish tape, insulating tape may be applied to the exposed section of the cable. Methods other than using a fish tape, such as pushing or twisting the cable through the conduit have been tried but with unsatisfactory results.

[0005] Unfortunately, the wire pull method and other methods of pulling the cable through the conduit do not always work properly, and if the wire pull becomes detached from the cable during the process of pulling the cable through the conduit, it can be difficult to extract the inserted cable to restart the entire process. Often in such situations, the conduit must be removed and / or broken to obtain the end of the cable, which can be expensive and time consuming.

[0006] For example, the technical solution described in Taiwan Patent TW201923271A requires the formation of step-shaped clamping ribs on the inner surface of the clamping claw in order to provide sufficient clamping force, which is very difficult to process and has high costs. In addition, the clamping claw needs to move left and right along the axis, so the upper and lower clamping claws are prone to eccentric misalignment, resulting in low clamping force and instability. Summary of the invention

[0007] The main technical problem to be solved by the present invention is to provide a cable pulling structure, which has relatively simple parts processing and assembly and relatively strong clamping force.

[0008] In order to solve the above technical problems, the present invention provides a cable lifting structure, comprising: a body, a cable, a clamping member and a clamping driving member;

[0009] The main body has a through cavity along the axial direction, and the clamping member and the driving member are placed in the through cavity; the clamping member and the clamping driving member together form a channel for the cable to pass through;

[0010] The clamping member has a first abutting surface abutting against the cable on a side facing the channel, and a second abutting surface on a side facing the clamping driving member; the clamping driving member has a push-matching surface matching with the second abutting surface;

[0011] When the cable enters the channel from one end of the body, the cable abuts against the first abutting surface, and the generated abutting force causes the clamping member to open in a direction away from the channel; after the cable passes through the clamping drive member through the channel, the cable and the clamping drive member form a linkage fit in the direction opposite to the direction in which the cable enters the body;

[0012] When the cable is subjected to a pulling force in the direction opposite to the direction in which the cable enters the body, the push-fitting surface abuts against the second push-fit surface, and the generated push-fit force causes the clamping member to close in the direction close to the channel and clamp with the side wall of the cable.

[0013] In a preferred embodiment, the clamping member includes at least one group of claws, each group of claws includes at least two claws; the claws are evenly distributed in a rotational manner around the axial direction of the channel.

[0014] In a preferred embodiment: a third abutting surface is provided on a side of the clamping claw away from the clamping driving member; the third abutting surface abuts against the second abutting surface of the clamping claw in the next group of clamping claws.

[0015] In a preferred embodiment, the outer diameter of the clamping claw gradually increases from one side close to the clamping driving member to the other side far away from the clamping driving member.

[0016] In a preferred embodiment: the clamping drive member is a clamping ring, and an opening for the cable to pass through is arranged at the center of the clamping ring; a convex strip is arranged on the outer periphery of the opening, and the convex strip extends along the radial direction of the opening and the direction in which the cable enters the body at the same time; the side of the convex strip facing the claw is the push-fitting surface.

[0017] In a preferred embodiment: the end of the protrusion is in interference fit with the side wall of the cable, and when the cable moves along the direction of entering the body, the friction force generated by the cable and the protrusion pushes the end of the protrusion to move in the direction away from the cable; when the cable moves against the direction of entering the body, the friction force generated by the cable and the protrusion pushes the end of the protrusion to move in the direction close to the cable.

[0018] In a preferred embodiment: the diameter of the opening is larger than the minimum outer diameter of the claw, and the push-fit surface and the first push-fit surface are bevel fit.

[0019] In a preferred embodiment: a sleeve is further included, which is disposed in the through cavity, and the cable enters the sleeve after passing through the channel.

[0020] In a preferred embodiment: the sleeve is an elastic part or a non-elastic part.

[0021] In a preferred embodiment: it includes a cover and a cable; the cover is connected to the other end of the body; and the cover is provided with a through hole along the axial direction of the body, and one end of the cable passes through the through hole and cooperates with the cover in a direction opposite to the direction in which the cable enters.

[0022] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0023] 1. The present invention provides a cable lifting structure. By providing a first push surface and a second push surface on the clamping member, when the cable enters, the cable pushes against the first push surface, causing the clamping member to open and increase the diameter of the channel, so that the cable can pass through the clamping member smoothly. When the cable is subjected to an outward pulling force, the clamping drive member will push against the mating surface and the second push surface to drive the clamping member to close, so that the clamping member and the cable are clamped to prevent the cable from falling out of the body. This structure has relatively simple processing requirements for the claws, and there is no need to form components such as card slots on the claws.

[0024] 2. The present invention provides a cable lifting structure, wherein the clamping member can be a plurality of groups of claws, and a third abutting surface is provided on the side of the claw away from the clamping driving member; the third abutting surface abuts against the second abutting surface of the claw in the next group of claws. In this way, the two adjacent groups of claws are linked, and after the first group of claws is folded, the third abutting surface abuts against the second abutting surface, which drives the next group of claws to fold. The more claw groups there are, the greater the clamping force on the cable, and the less likely the cable will fall off from the main body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 An exploded view of a cable lifting structure in a preferred embodiment of the present invention;

[0026] Figure 2 A cross-sectional view of a cable lifting structure in a preferred embodiment of the present invention;

[0027] Figure 3 for Figure 2 A partial enlarged view of . DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0029] refer to Figure 1-Figure 3 , a cable lifting structure, comprising: a body 1, a cable 2, a clamping member 3 and a clamping driving member 4;

[0030] The main body 1 has a through cavity along the axial direction, and the clamping member 3 and the driving member are placed in the through cavity; the clamping member 3 and the clamping driving member 4 together form a channel for the cable 2 to pass through;

[0031] The clamping member 3 has a first abutting surface 31 abutting against the cable 2 on the side facing the channel, and a second abutting surface 32 on the side facing the clamping driving member 4; the clamping driving member 4 has a push-matching surface 41 matching with the second abutting surface 32;

[0032] When the cable 2 enters the channel from one end of the body 1, the cable 2 abuts against the first abutting surface 31, and the generated abutting force causes the clamping member 3 to open in a direction away from the channel; after the cable 2 passes through the clamping driving member 4 through the channel, the cable 2 and the clamping driving member 4 form a linkage fit in the direction opposite to the direction in which the cable 2 enters the body 1;

[0033] When the cable 2 is subjected to a pulling force in the direction opposite to the direction in which the cable 2 enters the body 1 , the push-fitting surface 41 abuts against the second push-fit surface 32 , and the generated push-fit force causes the clamping member 3 to close in the direction close to the channel and clamp with the side wall of the cable 2 .

[0034] Therefore, the cable lifting structure described above can realize that when the cable 2 enters, the cable 2 pushes against the first push surface 31, so that the clamp 3 opens and increases the diameter of the passage, so that the cable 2 can pass through the clamp 3 smoothly. When the cable 2 is subjected to an outward pulling force, the clamp driving member 4 will push against the mating surface 41 and the second push surface 32, driving the clamp 3 to close, so that the clamp 3 and the cable 2 are clamped, and the cable 2 is prevented from escaping from the body. This structure has relatively simple processing requirements for the clamp 3, and there is no need to form components such as card slots on the clamp 3.

[0035] In this embodiment, the specific structure of the clamping member 3 is as follows:

[0036] The clamping member 3 includes two groups of claws, each group of claws includes three claws 33; the claws 31 are evenly distributed in a rotation around the axial direction of the channel. The claw group can be 1 group, or 3 groups or more. The more claw groups there are, the greater the clamping force on the cable 2. It can be designed according to actual needs. The number of claws 33 in each group of claws can also be increased or decreased as needed. They are all simple replacements of this embodiment and will not be repeated.

[0037] Since there are two groups of claws, and the clamping driving member 4 can only drive the adjacent group of claws to close, in order to allow the other group of claws to close, the claws 33 are provided with a third abutting surface 34 on the side away from the clamping driving member 4; the third abutting surface 34 abuts against the second abutting surface 32 of the claws 33 in the next group of claws. In this way, when the current group of claws closes, the next group of claws will also close due to the abutting force of the third abutting surface 34 and the second abutting surface 32.

[0038] The outer diameter of the claw 33 gradually increases from one side close to the clamping driving member 4 to the other side away from the clamping driving member. The first abutting surface 31 is arranged at the front end of the inner surface of the claw 33. The second abutting surface 32 is arranged at the front end of the claw 33, and the third abutting surface 34 is arranged at the rear end of the inner surface of the claw 33, and the second abutting surface 32 and the third abutting surface 34 are inclined surfaces, and the inclination directions of the two are the same.

[0039] In order to cooperate with the claw 33, the clamping drive member 4 is a clamping ring, and an opening for the cable 2 to pass through is provided at the center thereof; the push-fit surface 41 is provided at the periphery of the opening. The periphery of the opening is provided with a convex strip 42, and the convex strip 42 extends along the radial direction of the opening and the direction in which the cable enters the body 1; the side of the convex strip 42 facing the claw 33 is the push-fit surface 41.

[0040] In order to realize that after the cable 2 passes through the clamp driving member 4 through the channel, the cable 2 and the clamp driving member 4 form a linkage match in the direction opposite to the direction in which the cable 2 enters the body 1; in this embodiment, the end of the protrusion 42 is interference fit with the side wall of the cable 2, and when the cable 2 moves along the direction in which it enters the body 1, the friction force generated by the cable 2 and the protrusion 42 pushes the end of the protrusion 42 to move in the direction away from the cable 2; when the cable 2 moves in the direction opposite to the direction in which it enters the body 1, the friction force generated by the cable 2 and the protrusion 42 pushes the end of the protrusion 42 to move in the direction close to the cable 2. In this way, when the cable 2 enters the body 1, it can easily pass through the protrusion 42, and when the cable 2 is pulled outward, the clamp ring will hold the cable 2 to form a linkage match, thereby driving the first clamping claw group to retract.

[0041] The diameter of the opening is larger than the minimum outer diameter of the claw, so that the claw 33 in the frontmost claw group can be inserted into the opening, thereby achieving the abutment fit between the second abutting surface 32 and the abutment fit surface 41. The abutment fit surface 41 and the second abutment surface 32 are also inclined plane fit. The inclined plane fit means that at least one of the two surfaces is an inclined plane.

[0042] In this embodiment, a sleeve 5 is further included, which is arranged in the through cavity, and the cable 2 enters the sleeve 5 after passing through the channel. The sleeve 5 is an elastic tube or a non-elastic tube. The function of the sleeve 5 is to provide a balancing effect for the cable 2 so that it can be fixed in the sleeve 5. In this way, the clamping drive member 4 can be supported to balance it.

[0043] In this embodiment, it includes a cover 6 and a cable 7; the cover 6 is connected to the other end of the main body 1; and the cover 6 is provided with a through hole along the axial direction of the main body 1, and one end of the cable 7 passes through the through hole and cooperates with the cover 6 in a direction opposite to the direction in which the cable 7 enters.

[0044] The above is only a preferred embodiment of the present invention and cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the content of the specification should still fall within the scope of the present invention.

Claims

1. A cable lifting structure, characterized in that include: Main body, cables, clamping parts and clamping driving parts; The main body has a through cavity along the axial direction, and the clamping member and the driving member are placed in the through cavity; the clamping member and the clamping driving member together form a channel for the cable to pass through; The clamping member has a first abutting surface abutting against the cable on a side facing the channel, and a second abutting surface on a side facing the clamping driving member; the clamping driving member has a push-matching surface matching with the second abutting surface; When the cable enters the channel from one end of the body, the cable abuts against the first abutting surface, and the generated abutting force causes the clamping member to open in a direction away from the channel; after the cable passes through the clamping drive member through the channel, the cable and the clamping drive member form a linkage fit in the direction opposite to the direction in which the cable enters the body; When the cable is subjected to a pulling force in the direction opposite to the direction in which the cable enters the body, the push-fitting surface abuts against the second push-fit surface, and the generated push-fit force causes the clamping member to close in the direction close to the channel and clamp with the side wall of the cable.

2. A cable lifting structure according to claim 1, characterized in that: The clamping member comprises at least one group of claws, each group of claws comprises at least two claws; the claws are evenly distributed in a rotational manner around the axial direction of the channel.

3. A cable lifting structure according to claim 2, characterized in that: A third abutting surface is arranged on a side of the clamping claw away from the clamping driving member; the third abutting surface abuts against the second abutting surface of the clamping claw in the next group of clamping claws.

4. A cable lifting structure according to claim 3, characterized in that: The outer diameter of the clamping claw gradually increases from one side close to the clamping driving member to the other side far away from the clamping driving member.

5. A cable lifting structure according to claim 4, characterized in that: The clamping drive member is a clamping ring, and an opening for the cable to pass through is arranged at the center of the clamping ring; a convex strip is arranged on the outer periphery of the opening, and the convex strip extends along the radial direction of the opening and the direction in which the cable enters the body; the side of the convex strip facing the claw is the push-fitting surface.

6. A cable lifting structure according to claim 5, characterized in that: The end of the convex strip is in interference fit with the side wall of the cable. When the cable moves in the direction of entering the body, the friction force generated by the cable and the convex strip pushes the end of the convex strip to move in the direction away from the cable; when the cable moves against the direction of entering the body, the friction force generated by the cable and the convex strip pushes the end of the convex strip to move in the direction close to the cable.

7. A cable lifting structure according to claim 6, characterized in that: The diameter of the opening is larger than the minimum outer diameter of the claw, and the push-fit surface and the first push-fit surface are bevel-fitted.

8. A cable lifting structure according to any one of claims 1 to 7, characterized in that: It also includes a sleeve, which is arranged in the through cavity, and the cable enters the sleeve after passing through the channel.

9. A cable lifting structure according to claim 8, characterized in that: The sleeve is an elastic part or a non-elastic part.

10. A cable lifting structure according to any one of claims 1 to 7, characterized in that: It comprises a cover and a cable; the cover is connected to the other end of the body; and the cover is provided with a through hole along the axial direction of the body, and one end of the cable passes through the through hole and is limitedly matched with the cover in the direction opposite to the cable entering.

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