A secondary cable straightening tool

Abstract

The utility model relates to power construction tool technical field especially relates to a secondary cable straightening tool. It aims at solving the problem of low efficiency, easy to scald hand and high construction cost in the prior art when straightening secondary cable core by hand. The tool includes relatively movable left base and right base, and the base is fixed with the wire hole bearing block matched with semicircular hole, when the two bases are close, the semicircular hole is closed to form the wire hole for clamping the core, and the positioning column is used for guiding the relative movement of the two bases. When using, the core is placed in the suitable wire hole, and the base is held tightly and moved along the core direction to complete straightening. The utility model is simple in structure, convenient in operation, can safely and efficiently complete the straightening work of secondary cable core, effectively avoids the harm to the construction personnel, and significantly improves the work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power construction tools, and in particular to a secondary cable straightening tool. Background Technology

[0002] In the construction or renovation of power systems, especially in the field of relay protection, a large number of secondary cables need to be connected to the terminal blocks of the protection panel. Since secondary cables are usually in a spiral bent state when they leave the factory or are coiled, in order to meet the construction process requirements, each of their cores must be straightened before being connected to the terminal block.

[0003] Currently, construction workers generally straighten the yarn by hand or with gloves. When working by hand, the rapid friction between the hand and the yarn core generates a lot of heat, easily causing burns. To avoid burns, workers wear gloves, but this introduces new problems: if rubber gloves are used, their high coefficient of friction makes the straightening process very strenuous, leading to low work efficiency, and the gloves themselves wear out quickly; if cotton gloves are used, although the friction resistance is lower, they wear out even faster, increasing construction costs. Furthermore, wearing gloves does not fundamentally eliminate the risk of burns caused by frictional heat.

[0004] Therefore, the existing technology lacks a tool specifically for straightening the core of secondary cables, which leads to problems such as low efficiency, high cost and safety risks in this process, and urgently needs to be improved. Utility Model Content

[0005] To address the aforementioned problems in the prior art, namely the low efficiency, risk of hand burns, and high construction costs associated with manually straightening secondary cable cores, this utility model provides a secondary cable straightening tool, comprising:

[0006] A left base and a right base, wherein the left base and the right base are movable relative to each other;

[0007] At least one first-line hole support block is fixed to the left base;

[0008] At least one second wire hole support block is fixed to the right base and paired with the first wire hole support block;

[0009] The first wire hole bearing block and the second wire hole bearing block are respectively provided with at least one corresponding semi-circular hole. When the left base and the right base are close together, the semi-circular hole closes to form a wire hole for passing through and clamping the cable core.

[0010] It also includes at least one positioning post, one end of which is fixed to the right base and the other end of which is slidably inserted through the left base to guide the relative movement of the left base and the right base.

[0011] Furthermore, it also includes a tension spring, which is sleeved outside the positioning post and located between the left base and the right base, for pushing the left base and the right base apart along the axial direction of the positioning post under normal conditions.

[0012] Furthermore, the end of the positioning post extending out of the left base is provided with a groove, which is used to install a positioning post baffle to prevent the left base from detaching from the positioning post.

[0013] Furthermore, the number of positioning posts is two, and the two positioning posts are arranged in parallel.

[0014] Furthermore, the first wire hole support block and the second wire hole support block are respectively provided with multiple sets of corresponding semi-circular holes. When the left base and the right base are close together, the multiple sets of semi-circular holes close to form multiple wire holes with different diameters.

[0015] Furthermore, the at least one first wire hole support block includes an upper left wire hole support block fixed to the upper part of the left base and a lower left wire hole support block fixed to the lower part of the left base;

[0016] The at least one second wire hole support block includes an upper right wire hole support block fixed to the upper part of the right base and paired with the upper left wire hole support block, and a lower right wire hole support block fixed to the lower part of the right base and paired with the lower left wire hole support block.

[0017] Furthermore, both the first wire hole support block and the second wire hole support block are detachably fixed to their corresponding bases by wire hole support block fixing screws.

[0018] Furthermore, one end of the positioning post is fixed to the right base by a threaded connection.

[0019] The beneficial effects of this utility model are:

[0020] This invention provides a tool specifically designed for straightening secondary cable cores by incorporating relatively movable left and right bases and a wire hole bearing block fixed to the bases to form a closed wire hole. During operation, the user holds the tool base, while the cable core is constrained and straightened within the wire hole inside the tool. This structure completely isolates the user's hand from the wire core, which generates frictional heat, fundamentally solving the safety hazard of burns caused by frictional heat during bare-handed or gloved operation, greatly improving operational safety. Simultaneously, the positioning pins guide the two bases to move stably and precisely relative to each other, ensuring that the wire hole reliably clamps the wire core, making the straightening process smooth and stable. The user can apply more effective force, significantly improving work efficiency and solving the problems of laborious and inefficient bare-handed operation. Furthermore, as a reusable and durable device, this tool replaces easily worn and frequently replaced consumables such as gloves, effectively reducing construction material costs. In summary, this utility model has a simple structure and is easy to operate, enabling it to safely and efficiently complete cable straightening work while reducing construction costs. Attached Figure Description

[0021] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0022] Figure 1 This is a front view of a secondary cable straightening tool according to this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of a secondary cable straightening tool according to this utility model;

[0024] Figure 3 This is a side view of a secondary cable straightening tool according to this utility model;

[0025] Figure 4 This is a schematic diagram of the positioning post baffle in a secondary cable straightening tool of this utility model;

[0026] Figure 5 This is an isometric drawing of a secondary cable straightening tool according to this utility model. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] This utility model provides a secondary cable straightening tool including a left base 1 and a right base 2, which are movably coupled to each other; at least one first wire hole support block fixed to the left base 1; at least one second wire hole support block fixed to the right base 2 and paired with the first wire hole support block; wherein the first wire hole support block and the second wire hole support block are respectively provided with at least one corresponding semi-circular hole, and when the left base 1 and the right base 2 are close together, the semi-circular hole closes to form a wire hole for passing through and clamping the cable core; it also includes at least one positioning post 8, one end of which is fixed to the right base 2 and the other end is slidably inserted through the left base 1 to guide the relative movement of the left base 1 and the right base 2.

[0030] See Figure 1 and Figure 2 The left base 1 and right base 2 are made of high-strength engineering plastics or metal, and are designed in a rectangular or arc shape for easy hand grip. The positioning post 8, a guide mechanism made of smooth-surfaced 45# steel, ensures that the left base 1 can only move relative to the right base 2 along a preset linear trajectory. The first and second wire hole bearing blocks are firmly mounted on the opposite surfaces of the two bases, each bearing block having a precisely machined semi-circular groove. When the user holds the tool and applies force to bring the left and right bases closer together, the two paired semi-circular holes will precisely align and close, forming a complete circular wire hole. The cable core passes through this wire hole, and through the constraint and friction of the inner wall of the wire hole, straightening is achieved as the tool moves along the wire core. This ingenious design allows for effective clamping and straightening of the cable core through simple relative pressing actions, fundamentally avoiding direct friction between the hand and the wire core, eliminating the risk of burns and hand wear, and significantly improving construction safety and work efficiency.

[0031] In this embodiment, the tool further includes a extension spring 7, which is sleeved on the outside of the positioning post 8 and located between the left base 1 and the right base 2. The extension spring 7 is used to push the left base 1 and the right base 2 apart along the axial direction of the positioning post 8 under normal conditions. See also Figure 2 and Figure 3The extension spring 7 is preferably a compression spring, made of steel wire or stainless steel spring steel, and is coaxially mounted on the rod of the positioning post 8. The two ends of the spring abut against the inner surfaces of the left base 1 and the right base 2, respectively. In its natural state, the spring is at its free length or slightly pre-compressed, and its elastic energy generates a continuous thrust, pushing the left base 1 and the right base 2 to a separated position. This causes the wire hole support block to separate, and the semi-circular hole is open, facilitating the placement of the bent cable core into the appropriate semi-circular slot by the operator. When straightening is required, the user applies gripping force to overcome the spring force and bring the base closer; when straightening is complete or the wire core needs to be replaced, simply releasing the hand causes the tool to automatically return to its original position under the action of the spring. This design gives the tool an automatic springback function, simplifies the operation steps, and allows for the completion of all actions—placement, clamping, straightening, and release—with one hand, significantly improving work continuity and efficiency while reducing the operator's workload.

[0032] In this embodiment, the positioning post 8 is slidably inserted through a groove at the free end of the left base 1. The groove is used to install the positioning post baffle 9 to prevent the left base 1 from detaching from the positioning post 8. See also Figure 4 In practice, a ring-shaped groove is machined at the free end of the positioning post 8 by turning or milling. The positioning post stop 9 uses an E-type or C-type snap ring structure and is directly inserted into the groove during assembly. Since the outer diameter of the positioning post stop 9 is larger than the diameter of the through hole on the left base 1, it forms a reliable mechanical limit. When the extension spring 7 pushes the left base 1 open, the end face of the left base 1 will abut against the positioning post stop 9 and stop moving, ensuring that the two bases will not completely separate. This design not only prevents the tool from accidentally falling apart when not in operation, but also ensures the safety and convenience of operation, and improves the overall structural stability and service life of the tool.

[0033] In this embodiment, there are two positioning posts 8, and these two positioning posts 8 are arranged in parallel. See also Figure 2 and Figure 5 Two identical positioning posts 8 are fixed parallel to each other on the right base 2 and simultaneously slide through the corresponding two through holes on the left base 1. Compared to the single-guide-post structure, the double-guide-post structure provides a more stable guide, completely eliminating any relative rotation or wobbling that may occur between the left and right bases. This highly stable guide ensures that when the tool is gripped, the multiple wire hole bearing blocks and their semi-circular holes maintain a precise parallel alignment, thus closing into a perfect circular wire hole and avoiding excessive compression or damage to the cable core due to misalignment. This structural optimization significantly enhances the tool's durability and operational reliability, making the straightening action smoother and more stable.

[0034] In this embodiment, the first wire hole bearing block and the second wire hole bearing block are respectively provided with multiple sets of corresponding semicircular holes. When the left base 1 and the right base 2 are close together, the multiple sets of semicircular holes close to form multiple wire holes of different diameters, including the first wire hole 11, the second wire hole 12, the third wire hole 13, and the fourth wire hole 14. See also Figure 1 and Figure 2 These wire holes have diameters of 6mm, 5mm, 4mm, and 3mm to correspond to different specifications of secondary cable cores in power engineering. When using them, construction workers can quickly select the matching wire hole based on the actual diameter of the cable to be processed. For example, a 4.5mm diameter core can be placed in the first wire hole 11, and a 3.5mm diameter core can be placed in the third wire hole 13. This multi-size design avoids the hassle of preparing multiple tools for different cable specifications, greatly enhancing the tool's versatility and practicality, making it a multi-functional integrated tool that can meet the needs of various working conditions, and significantly improving work efficiency.

[0035] In this embodiment, the first wire hole support block includes an upper left wire hole support block 3 fixed to the upper part of the left base 1 and a lower left wire hole support block 5 fixed to the lower part of the left base 1; the second wire hole support block includes an upper right wire hole support block 4 fixed to the upper part of the right base 2 and paired with the upper left wire hole support block 3, and a lower right wire hole support block 6 fixed to the lower part of the right base 2 and paired with the lower left wire hole support block 5. See also Figure 1 , Figure 2 and Figure 5 This double-layered working area design effectively utilizes the base space, achieving a significant increase in functionality while maintaining the tool's compact and portable design. Specifically, the larger diameter first and second wire holes 11 and 12 are positioned on the upper left and upper right wire hole support blocks 3 and 4 of the upper support block, while the smaller diameter third and fourth wire holes 13 and 14 are positioned on the lower left and lower right wire hole support blocks 5 and 6 of the lower support block. This layered layout makes the tool structure compact and symmetrical, with more balanced force distribution. It allows the operator to choose the appropriate position for operation based on the wire diameter, optimizing the overall structural design and ergonomics of the tool, making gripping and force application more comfortable and convenient.

[0036] In this embodiment, both the first wire hole support block and the second wire hole support block are detachably fixed to their corresponding bases by wire hole support block fixing screws 10. See also Figure 2 and Figure 5All the wire hole support blocks—upper left wire hole support block 3, upper right wire hole support block 4, lower left wire hole support block 5, and lower right wire hole support block 6—are independent parts, installed in the pre-reserved mounting positions on bases 1 and 2 using wire hole support block fixing screws 10. The screws are countersunk hexagonal head screws; after installation, their heads are recessed into the tapered holes on the surface of the support block, ensuring a flat, unprotruding working surface. When a support block wears down due to long-term use and affects its performance, the user only needs to unscrew the fixing screws to replace it with a new one. This modular design significantly reduces long-term operating costs, extends the overall lifespan of the tool, and provides possibilities for subsequent functional upgrades or customized modifications.

[0037] In this embodiment, one end of the positioning post 8 is fixed to the right base 2 by a threaded connection. See also Figure 2 and Figure 3 In practice, an external thread is machined on the end of the positioning pin 8 that needs to be fixed, and a matching internal threaded hole is machined at the corresponding position on the right base 2. During assembly, the positioning pin 8 is directly screwed into the threaded hole and tightened. To prevent loosening due to vibration during long-term use, an anaerobic adhesive or other thread-locking agent can be applied to the threaded joint. Compared with permanent connections such as press fitting or welding, threaded connections are not only easier to install and less expensive, but also easier to disassemble when maintenance or replacement of the positioning pin is required. This design takes into account the reliability of the connection, the feasibility of production, and the convenience of later maintenance, providing a guarantee for the long-term stable use of the tool.

[0038] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0041] The technical solution of this utility model has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A secondary cable straightening tool, characterized in that, include: A left base (1) and a right base (2), wherein the left base (1) and the right base (2) are movable relative to each other; At least one first wire hole bearing block is fixed to the left base (1); At least one second wire hole support block is fixed to the right base (2) and paired with the first wire hole support block; The first wire hole bearing block and the second wire hole bearing block are respectively provided with at least one corresponding semi-circular hole. When the left base (1) and the right base (2) are close together, the semi-circular hole closes to form a wire hole for passing through and clamping the cable core. It also includes at least one positioning post (8), one end of which is fixed to the right base (2) and the other end is slidably inserted through the left base (1) to guide the relative movement of the left base (1) and the right base (2).

2. The secondary cable straightening tool according to claim 1, characterized in that, It also includes a stretch spring (7), which is sleeved on the outside of the positioning post (8) and located between the left base (1) and the right base (2), for pushing the left base (1) and the right base (2) apart along the axial direction of the positioning post (8) under normal conditions.

3. The secondary cable straightening tool according to claim 1 or 2, characterized in that, The end of the positioning post (8) extending out of the left base (1) is provided with a groove, which is used to install the positioning post baffle (9) to prevent the left base (1) from detaching from the positioning post (8).

4. The secondary cable straightening tool according to claim 1, characterized in that, The number of the positioning posts (8) is two, and the two positioning posts (8) are arranged in parallel.

5. The secondary cable straightening tool according to claim 1, characterized in that, The first wire hole support block and the second wire hole support block are respectively provided with multiple sets of corresponding semi-circular holes. When the left base (1) and the right base (2) are close to each other, the multiple sets of semi-circular holes close to form multiple wire holes with different diameters.

6. The secondary cable straightening tool according to claim 5, characterized in that, The at least one first wire hole support block includes an upper left wire hole support block (3) fixed to the upper part of the left base (1) and a lower left wire hole support block (5) fixed to the lower part of the left base (1). The at least one second wire hole support block includes an upper right wire hole support block (4) fixed to the upper part of the right base (2) and paired with the upper left wire hole support block (3), and a lower right wire hole support block (6) fixed to the lower part of the right base (2) and paired with the lower left wire hole support block (5).

7. The secondary cable straightening tool according to claim 1, characterized in that, Both the first wire hole support block and the second wire hole support block are detachably fixed to their corresponding bases by wire hole support block fixing screws (10).

8. The secondary cable straightening tool according to claim 1, characterized in that, One end of the positioning post (8) is fixed to the right base (2) by a threaded connection.

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