Adjustable cable fastening device

Abstract

The invention discloses an adjustable cable fastening device, which belongs to the field of cable erection equipment, and mainly comprises three rollers in a shape like a Chinese character'pin ', each roller is provided with a sliding groove for a cable to bypass, the groove bottom of the upper part of the sliding groove of a driving roller is provided with a concave part, and the circle center of the concave part falls on the diameter of the driving roller. A mounting block is arranged on the opening side of the concave part and is opposite to the concave part, a locking bolt is in threaded fit with the mounting block, and when the locking bolt is screwed into the mounting block, the cable located at the opening of the groove part can be extruded, and the cable is extruded into the concave part, so that the cable is fixed. The adjustable cable fastening device is convenient to operate, one end of the cable can be firmly installed in the fastening device very reliably, and a guarantee is provided for maintaining the tensioning state of the cable in the cable erecting process.

Description

Technical Field

[0001] The invention relates to the technical field of cable installation equipment, in particular to an adjustable cable fastening device. Background Art

[0002] In the process of overhead cable installation, manual tightening is the most basic and simplest method. You only need to use hand tools such as wrenches and torque pliers to tighten. Taking wire rope as an example, by manually adjusting the strength of tools such as threaded wheels and wrenches, the tension of the wire rope is continuously increased to tighten the cable so that the cable can be installed and fixed. The advantages of manual tightening method are that it is simple and easy, the tools are simple, and no additional equipment investment is required. However, the disadvantages are also obvious. Because it requires manual operation, the stability and accuracy of its tension are greatly limited, making it difficult to ensure a certain tension accuracy. At the same time, the manual tightening method has high requirements on the physical strength and skills of the operator and requires more professional operating skills.

[0003] To this end, technicians in this field have developed some tensioners for tensioning. Generally speaking, the function of the tensioner is to simply add an intermediate threaded adjuster to the overhead wire rope of the cable to control and adjust the tension of the wire rope as needed, greatly improving the operational efficiency and reliability of tensioning the cable.

[0004] The existing auxiliary cable tensioning equipment has been developed to the purpose of automatically setting and controlling the tension by using sensor elements. For this field, this design method has become routine. However, although these existing cable tightening devices can provide tension values ​​with high precision, they still have not made in-depth optimization and improvement on how to reliably fix the cables on the equipment. Usually, they simply clamp or install special connection terminals to match the corresponding equipment models used. As far as the connection between the cable and the tightening device itself is concerned, the reliability is insufficient. Once the reliability is insufficient, there is a possibility of falling off when the cable is installed, especially when large cables are installed over long distances. Then, even if the equipment itself has a higher accuracy in tension control, it cannot exert its corresponding use effect advantages. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an adjustable cable fastening device to solve the problem that the reliability of the connection between the cable and the fastening device still needs to be further improved.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adjustable cable fastening device, comprising three rollers in a triangle shape, each roller having a slide groove for the cable to pass around, a recessed portion at the upper bottom of the slide groove of the active roller, the center of the recessed portion falls on the diameter of the active roller, a mounting block is provided on the opening side of the recessed portion opposite to the recessed portion, a locking bolt is threadedly engaged on the mounting block, and when the locking bolt is screwed into the mounting block, the cable located at the opening of the groove portion can be squeezed and the cable can be squeezed into the recessed portion to fix the cable.

[0007] Furthermore, the wheel disc at one end of each roller is configured as a cylindrical gear structure, and the wheel discs of the three rollers are meshed and transmitted with each other through the cylindrical gear structure, and a clamping column that can be inserted into the tooth gap is provided at the tooth gap in the cylindrical gear structure of one of the rollers, and after the clamping column is inserted into the tooth gap, the wheel disc cannot mesh and transmit.

[0008] Furthermore, a ┐-shaped bracket is fixed on the end face of the wheel disc, one section of the bracket is vertically fixed to the end face of the wheel disc, and the other section is arranged parallel to the end face of the wheel disc. The clamping column is located below the other section of the bracket and is fixed by a fastening bolt.

[0009] Furthermore, a threaded hole is provided on another section of the bracket, and the fastening bolt passes through the threaded hole in a threaded manner and then contacts and engages with the clamping column.

[0010] Furthermore, the fastening bolt is a T-bolt structure, and a strip hole is provided on the clamping column. The nut of the T-bolt is located between the clamping column and the end face of the wheel disc. The threaded column of the T-bolt extends out of the other section of the bracket after passing through the strip hole and is fastened at the bottom of the other section of the bracket by a locking nut.

[0011] Furthermore, one end of the clamping column is an isosceles trapezoidal structure, and one end of the clamping column is in socket fit with the gear tooth gap.

[0012] Furthermore, the rotating shaft of the roller includes a smooth shaft for winding the cable, and a threaded shaft for threadably engaging the pressure plate. When the pressure plate moves toward the wheel disc, the cable wound on the rotating shaft is squeezed and fixed between the wheel disc and the pressure plate.

[0013] Furthermore, a baffle is fixed at the end of the threaded shaft, and a pressure-resistant spring is coaxially sleeved between the baffle and the pressure plate, and the pressure-resistant spring is always in a compressed state.

[0014] Furthermore, it also includes an outer screw cover and an inner screw cover which are threadedly sleeved on the locking bolt, and the two screw covers are threadedly connected to the position of the locking bolt between the mounting block and the nut, and the inner screw cover is coaxially located on the inner side below the outer screw cover, and after the bottom end of the inner screw cover is rotated so that the inner bottom surface of the inner screw cover contacts and presses the end of the cable extending out of the recessed portion, the outer screw cover is turned to axially squeeze the inner screw cover to achieve a tightening connection.

[0015] Furthermore, the bottom end of the inner screw cover has a driving disk portion extending radially thereof, the disk edge of the driving disk portion extends out of the bottom end of the outer screw cover, and on the side wall of the inner screw cover, a plurality of elastically telescopically mounted sliding columns are arranged in a circular array, and the end of the sliding column exposed outside the inner screw cover is a smooth inclined surface; when the outer screw cover rotates toward the inner screw cover, the bottom end of the outer screw cover contacts and cooperates with the inclined surface to push all the sliding columns to move synchronously toward the center of the inner screw cover, and the end of at least one sliding column is in extrusion contact with the portion of the cable close to the mounting block.

[0016] Beneficial effects: The present invention provides an adjustable cable fastening device, which has the following beneficial effects: convenient operation, the degree of cable tension can be controlled by controlling the rolling of the roller, and the device can also fully fasten the cable. Specifically: The cable is wound around three rollers, which itself acts as the first level of tensioning.

[0017] A recess is provided on one of the rollers, and the cable is pressed into the recess using a locking bolt to prevent the cable from detaching. This is the second level of tightening.

[0018] The third level of fastening is to use a clamping column to clamp the wheel of the gear structure to prevent the roller from rotating.

[0019] Use the inner screw cap to tighten the cable end, which is the fourth level of tightening.

[0020] Use the outer screw cover to compress the inner screw cover, which is the fifth level of fastening.

[0021] Use the sliding post on the inner screw cover to press the cable end sideways against the surface of the mounting block, which is the sixth level of fastening.

[0022] It can be seen that the present invention can well maintain the cable in a taut installation state through the above series of fixing effects on the cable, which is beneficial to the rapid laying of overhead cables, especially for the laying of large-diameter and long-distance cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram of the present invention; Figure 2 A cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 The enlarged cross-sectional view at A in the middle; Figure 4 for Figure 1 The enlarged view of point B in the middle; Figure 5 A structural diagram of a bracket; Figure 6 A structural diagram of a card column; Figure 7 A schematic diagram of a structure in which a cable is wound around a roller.

[0024] In the figure: cable 1, mounting plate 2, roller 3, wheel disc 301, pressure plate 302, baffle plate 303, rotating shaft 304, recessed portion 4, mounting block 5, locking bolt 6, outer screw cover 7, inner screw cover 8, sliding column 9, bracket 10, locking nut 11, clamping column 12, strip hole 13, driving disc portion 14, compression spring 15. DETAILED DESCRIPTION

[0025] This specification will clearly and completely express the technical solutions in the following examples based on the drawings of the embodiments of the present invention. The implementation methods described in this specification are only some of the embodiments of the present invention, not all of them. All other embodiments extended and inspired by those skilled in the art based on these embodiments in this application without creative work should fall within the scope of protection of the present invention.

[0026] like Figure 1-Figure 3 As shown, the adjustable cable tightening device in this embodiment mainly includes three rollers 3 in a triangle shape. The three rollers 3 can be installed on a mounting plate 2. The mounting plate 2 serves as a mounting carrier of the tightening device and can also adaptively install some existing auxiliary devices such as tension sensors. These existing functional devices are not described in detail in this embodiment and do not belong to the improved technical content of the present invention. Specifically, each roller 3 in the present embodiment has a groove for the cable 1 to pass around, and the cable 1 passes around these rollers 3 in turn. One of the key points is that a recessed portion 4 is specially processed at the upper bottom of the groove of an active roller 3, and the center of the recessed portion 4 falls on the diameter of the active roller 3. On the opening side of the recessed portion 4, a mounting block 5 is provided opposite to it. The mounting block 5 is threaded with a locking bolt 6. When the locking bolt 6 is screwed into the mounting block 5, it can squeeze the cable 1 located at the opening of the groove, thereby squeezing the cable 1 into the recessed portion 4, and finally fixing the end of the cable 1, so that the construction personnel can pull and tighten the cable 1 through the device to fix and install it at the corresponding position. Moreover, the straightness or tightness of the cable 1 can be adjusted by rotating the roller 3.

[0027] In this embodiment, Figure 1 and Figure 4 In the structure shown, the wheel disc 301 at one end of each roller 3 is set as a cylindrical gear structure, or the wheel disc 301 is directly processed into a cylindrical gear. The wheel discs 301 of the three rollers 3 are meshed with each other through the cylindrical gear structure. Then, only one of the rollers 3 needs to be rotated, and the other rollers 3 will rotate accordingly to pull the cable 1. In order to fix the end of the cable 1 even if the hand is loosened after tightening, a clamping column 12 that can be inserted into the tooth gap can be provided at the tooth gap in the cylindrical gear structure of one of the rollers 3, such as Figure 4 In the specific production, one end of the clamping column 12 is an isosceles trapezoidal structure, and one end of the clamping column 12 is in socket fit with the gear tooth gap. After the clamping column 12 is inserted into the gear tooth gap, the wheel 301 cannot engage in transmission, and then the cable 1 remains in a tensioned state. Figure 4 and Figure 5 As shown, a bracket 10 in the shape of ┐ is fixed on the end face of the wheel disc 301. One section of the bracket 10 is fixed vertically to the end face of the wheel disc 301, while the other section is arranged parallel to the end face of the wheel disc 301. The clamping column 12 mentioned above is just located below the other section of the bracket 10 and is fixed by a fastening bolt. Specifically, the fastening bolt can be axially compressed to fix the clamping column 12 at this time to maintain its clamping and anti-rotation function. That is, in practice, a threaded hole can be provided on the other section of the bracket 10. After the fastening bolt passes through the threaded hole in a threaded manner, it contacts and engages with the clamping column 12, compresses the clamping column 12, and fixes the clamping column 12. In addition, in order to facilitate the operation of the clamping column 12 and prevent the clamping column 12 from detaching from the device, the above-mentioned fastening bolt can be set as a T-bolt structure, and as shown Figure 6 As shown, a bar hole 13 is provided on the clamping column 12, and the nut of the T-bolt is located between the clamping column 12 and the end surface of the wheel 301. The threaded column of the T-bolt passes through the bar hole 13 and extends out of the other section of the bracket 10, and is fastened by a locking nut 11 under the other section of the bracket 10, thereby realizing the fixed installation of the clamping column 12. This structure is the most secure and easy to operate.

[0028] In order to further enhance the fixing effect on the cable 1, as Figure 1 and Figure 7As shown, the rotating shaft 304 of the roller 3 includes a smooth shaft for winding the cable 1, and a threaded shaft for threadably sleeved with the pressure plate 302. When the pressure plate 302 is rotated and moved toward the wheel 301, the cable 1 wound on the rotating shaft 304 can be fully squeezed and fixed between the wheel 301 and the pressure plate 302, thereby improving the tightness. In order to make the pressure plate 302 more stable and reliable, a baffle 303 can be fixed at the end of the threaded shaft, and a pressure-resistant spring is coaxially sleeved between the baffle 303 and the pressure plate 302. The pressure-resistant spring is always in a compressed state, and an axial thrust force is always applied to the pressure plate toward the cable 1 to prevent it from being easily loosened.

[0029] As an optimal implementation structure, Figure 2-Figure 3 As shown, the fastening device also includes an outer screw cap 7 and an inner screw cap 8 which are threadedly sleeved on the locking bolt 6. Both screw caps are threadedly connected to the locking bolt 6 between the mounting block 5 and the nut, and the inner screw cap 8 is coaxially located on the inner side below the outer screw cap 7. This double threaded connection structure can rotate the bottom end of the inner screw cap 8, so that the inner bottom surface of the inner screw cap 8 is in contact and pressed with the end of the cable 1 extending out of the recessed portion 4, thereby achieving a primary fastening effect, and then turn to the outer screw cap 7 to axially squeeze the inner screw cap 8 to prevent the inner screw cap 8 from loosening, thereby achieving a secondary fastening. On the basis of the above structure, more particularly, the bottom end of the inner screw cap 8 has a drive disk portion 14 extending radially thereof, and the disk edge of the drive disk portion 14 extends out of the bottom end of the outer screw cap 7 so that the drive disk portion 14 can be easily rotated and better contacted with the cable 1. In terms of manufacturing, a plurality of elastically telescopically mounted sliding columns 9 can be provided in an annular array on the side wall of the inner screw cap 8, for example Figure 3 As shown, a compression spring 15 is arranged on the sliding column 9 to realize elastic telescopic movement. The ends of these sliding columns 9 that are exposed outside the inner screw cover 8 are all processed into smooth inclined surfaces. This is so that when the outer screw cover 7 rotates toward the inner screw cover 8, the bottom end of the outer screw cover 7 contacts and cooperates with the inclined surface, and all the sliding columns 9 can be pushed to move synchronously toward the center of the inner screw cover 8. At least one end of the sliding column 9 can be well pressed and contacted with the part of the cable 1 close to the mounting block 5, pressing the cable 1 against the side wall of the mounting block 5, and then realizing more reliable fixation. Even if the cable 1 is installed with a large size and a large distance, it can fully ensure that the cable 1 will not fall or loosen easily due to excessive weight.

[0030] It should be explained here that, in this specification, terms such as first and second are only used to distinguish one feature from another, and do not mean that there is a certain relationship or order between these technical features. The terms "including" and "comprising" refer to the inclusion of one or some technical means or features, specifically meaning that there are other existing or non-existing technical features that have not been included. The discussion in the above embodiments is only a representative example for the present invention, and is by no means the only restrictive constraint feature. A person of ordinary skill in the art should understand that, without departing from the technical content recorded in all the claims of this application, some simple substitutions and modifications can be made, thereby changing or becoming equivalent to other specific embodiments and application scenarios. However, no matter how the adaptability is changed, these embodiments will inevitably fall within the scope of protection of the present invention.

Claims

1. An adjustable cable fastening device, characterized in that: The invention comprises three rollers (3) which are in a triangle shape, each roller (3) having a slide groove for a cable (1) to pass around, a recessed portion (4) at the bottom of the upper groove of the active roller (3), the center of which falls on the diameter of the active roller (3), a mounting block (5) is provided on the opening side of the recessed portion (4) opposite to the recessed portion, a locking bolt (6) is threadedly engaged on the mounting block (5), and when the locking bolt (6) is screwed into the mounting block (5), the cable (1) located at the opening of the recessed portion can be squeezed, and the cable (1) can be squeezed into the recessed portion (4) to fix the cable (1).

2. The adjustable cable fastening device according to claim 1, characterized in that: The wheel disc (301) at one end of each roller (3) is arranged as a cylindrical gear structure, the wheel discs (301) of the three rollers (3) mesh with each other for transmission through the cylindrical gear structure, and a clamping column (12) capable of being inserted into the gear tooth gap is provided at a gear tooth gap in the cylindrical gear structure of one of the rollers (3), and after the clamping column (12) is inserted into the gear tooth gap, the wheel disc (301) cannot mesh with each other for transmission.

3. The adjustable cable fastening device according to claim 2, characterized in that: A bracket (10) in the shape of ┐ is fixed on the end surface of the wheel disc (301), one section of the bracket (10) is vertically fixed on the end surface of the wheel disc (301), and the other section is arranged parallel to the end surface of the wheel disc (301), and the clamping column (12) is located below the other section of the bracket (10) and is fixed by a fastening bolt.

4. The adjustable cable fastening device according to claim 3, characterized in that: A threaded hole is provided on another section of the bracket (10), and the fastening bolt is threadably passed through the threaded hole and then abuts against the clamping column (12).

5. The adjustable cable fastening device according to claim 3, characterized in that: The fastening bolt is a T-bolt structure, and a bar hole (13) is provided on the clamping column (12). The nut of the T-bolt is located between the clamping column (12) and the end surface of the wheel disc (301). The threaded column of the T-bolt passes through the bar hole (13) and then extends out of the other section of the bracket (10), and is fastened by a locking nut (11) below the other section of the bracket (10).

6. The adjustable cable fastening device according to claim 2, characterized in that: One end of the clamping column (12) is an isosceles trapezoidal structure, and one end of the clamping column (12) is in socket-and-socket fit with the gear tooth gap.

7. The adjustable cable fastening device according to claim 1, characterized in that: The rotating shaft (304) of the roller (3) comprises an optical shaft for winding the cable (1) and a threaded shaft for threadably engaging with the pressure plate (302); when the pressure plate (302) moves toward the wheel disc (301), the cable (1) wound on the rotating shaft (304) is squeezed and fixed between the wheel disc (301) and the pressure plate (302).

8. The adjustable cable fastening device according to claim 7, characterized in that: A baffle (303) is fixed at the end of the threaded shaft, and a pressure-resistant spring is coaxially sleeved between the baffle (303) and the pressure plate (302), and the pressure-resistant spring is always in a compressed state.

9. The adjustable cable fastening device according to claim 1, characterized in that: It also includes an outer screw cover (7) and an inner screw cover (8) which are threadedly sleeved on the locking bolt (6). Both screw covers are threadedly connected to the locking bolt (6) between the mounting block (5) and the nut, and the inner screw cover (8) is coaxially located on the inner side below the outer screw cover (7). After the bottom end of the inner screw cover (8) is rotated so that the inner bottom surface of the inner screw cover (8) contacts and presses against the end of the cable (1) extending out of the recessed portion (4), the outer screw cover (7) is rotated to axially press the inner screw cover (8) to achieve a tightening connection.

10. The adjustable cable fastening device according to claim 9, characterized in that: The bottom end of the inner screw cover (8) is provided with a driving disk portion (14) extending in its radial direction, the disk edge of the driving disk portion (14) extends out of the bottom end of the outer screw cover (7), and on the side wall of the inner screw cover (8), a plurality of elastically telescopically mounted sliding columns (9) are arranged in an annular array, and the end of the sliding column (9) exposed outside the inner screw cover (8) is a smooth inclined surface; when the outer screw cover (7) rotates toward the inner screw cover (8), the bottom end of the outer screw cover (7) contacts and cooperates with the inclined surface to push all the sliding columns (9) to move synchronously toward the center of the inner screw cover (8), and the end of at least one sliding column (9) is pressed and contacted with the portion of the cable (1) close to the mounting block (5).

Images