Cable tensioning device

Abstract

The utility model relates to a cable tensioning device which comprises a protective cover, a sliding rail, a gear, a rack, a gear shaft, a cable clamp, a wrench, an angle steel clamp and the like. The device is fixed to angle steel where a tower cross arm is located through the angle steel clamp, a cable is clamped and reliably fixed through the cable clamp, an operator rotates the wrench clockwise, the gear is driven to rotate clockwise, then the rack is driven to linearly move leftwards along the sliding rail, and therefore the cable is tensioned; wherein the wrench can be repeatedly rotated in a small range through the structure of the ratchet wheel and the gear so as to drive the gear to drive the rack to move leftwards, and when the tensioning requirement of a cable is met, the rotation action of the wrench is limited through the effect of locking the straight gear through the second ratchet wheel; the device has the characteristics of simple structure, convenience in operation and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power auxiliary tools, and particularly relates to a cable tightening device. Background Art

[0002] In the construction of overhead line erection, the cable is connected to the fitting through the insulator string. In the technical requirements, the cable needs to be pre-tightened to ensure that the cable between two adjacent poles has a certain sag value. During this process, the operator usually uses different auxiliary tools to fix and pre-tighten the cable. Among them, CN205646640U discloses a portable small cable tightening device, which realizes the tightening requirement of the cable through the gear, ratchet and worm and worm structure; however, this structure is relatively complex and the manufacturing cost is high. Therefore, the purpose of the present invention is to provide an auxiliary tool with a relatively simple structure. Summary of the Invention

[0003] According to the problems mentioned in the background art, the present invention provides a cable tightening device, which includes a protective cover 1, a slide rail 2, a gear 3, a rack 4, a gear shaft 5, a wire clamp 7, a wrench 8 and an angle steel clamp 100; the gear 3 meshes with the rack 4 adapted thereto; the rack 4 is installed in the slide rail 2, and its right end is connected to the wire clamp 7; the wire clamp 7 clamps the cable 200 to fix it reliably; the bottom surface of the rack 4 is fixedly connected to the lower surface inside the protective cover 1, and the middle positions of the front and rear side plates of the protective cover 1 are provided with shaft holes for installing the gear shaft 5, and its bottom is fixedly connected to the angle steel clamp 100. The gear 3 is rotatably installed at the middle position between the front and rear side plates inside the protective cover 1 through the gear shaft 5; the wrench 8 is installed at the front position of the gear shaft 5.

[0004] Furthermore, a pin hole for connecting a U-shaped hanging ring 6 is opened at the right end of the rack 4, and is hinged to the front and rear pin holes symmetrically opened at the left open end of the U-shaped hanging ring 6 through a pin shaft. And a screw hole is opened at the closed end on the right side of the U-shaped hanging ring 6, and is installed in the screw hole where the U-shaped hanging ring 6 is located through a screw rod, and is cooperatively connected with the screw hole opened in the left and right directions of the wire clamp 7.

[0005] Further, the gear 3 is a spur gear 31; a plurality of uniformly distributed sliding cavities adapted to the first ratchet wheel 32 are machined on the circular surface of the shaft portion of the spur gear 31. The sliding cavity is a receiving space opened along the tangential direction of the circular surface of its shaft portion. Further, the ball 33 where the first ratchet wheel 32 is located is restricted to roll on the inner surface of the sliding cavity; a plurality of uniformly distributed mounting holes for the springs 34 are machined on the circular surface of the first ratchet wheel 32. A shaft hole for mounting the gear shaft 5 is provided on its shaft portion, and a keyway is provided on the shaft hole; the spring 34 is mounted in the mounting hole, and the ball 33 is connected to the spring 34; the front portion of the gear shaft 5 is machined into a hexagonal shape, and a keyway is provided on its shaft, and it is connected to the first ratchet wheel 32 through a key 51 in a matching manner; one end of the wrench 8 has a hexagonal hole matching the hexagonal front portion of the gear shaft 5; a second ratchet wheel 9 is mounted at the middle position of the left end of the protective cover 1, and the second ratchet wheel 9 meshes with the spur gear 31; a rack pin hole 41 is provided on the right portion of the rack 4, and rack slideways 42 are provided on the lower portions of its front and rear surfaces. The slide rail 2 is machined into an inverted T-shaped groove, and the rack slideway 42 is mounted in a matching manner with the inverted T-shaped groove.

[0006] Further, the wire clamp 7 includes a pressing plate 71 and a bearing plate seat 72; a pair of screw holes are provided at positions near the front and rear ends of the bearing plate seat 72, and a through hole is provided on its left and right surfaces; the middle portion of the pressing plate 71 is bent into an arc surface, and through holes corresponding to the pair of screw holes where the bearing plate seat 72 is located are also provided at its front and rear portions. A bolt member is installed therein to connect it to the U-shaped hanging ring 6; the pressing plate 71 and the bearing plate seat 72 are connected by a front fastening bolt and a rear fastening bolt; the cable 200 is clamped and fixed between the pressing plate 71 and the bearing plate seat 72.

[0007] Preferably, a plurality of anti-slip protrusions are provided on the contact surfaces of the pressing plate 71 and the bearing plate seat 72 with the cable 200.

[0008] Further, the angle steel clamp 100 includes a right-angle bent outer plate 101 and an inner plate 102, and corresponding screw holes are provided on each of its surfaces. The outer plate 101 and the inner plate 102 are fastened by angle steel bolts, and then the angle steel is clamped and fixed therebetween.

[0009] Preferably, symmetrically arranged square holes for weight reduction are provided on the front and rear surfaces of the protective cover 1.

[0010] Beneficial effects: The cable tightening device of the present invention has the characteristics of simple structure and easy operation. The device is fixed to the angle steel where the cross arm of the pole tower is located through the angle steel clamp 100, and the cable 200 is clamped and reliably fixed through the wire clamp 7. Then, when the operator rotates the wrench 8 clockwise, the driving gear 3 rotates clockwise, and then drives the rack 4 to move linearly to the left along the slide rail 2, thereby tightening the cable 200. Among them, through the structure of the first ratchet 32 and the gear 3, the wrench 8 can be rotated repeatedly within a small range to drive the gear 3 to drive the rack 4 to move to the left. When the tightening requirement of the cable 200 is met, the rotation of the wrench 8 is restricted through the locking effect of the second ratchet 9 on the spur gear 31. This structure avoids the potential safety hazards of high-altitude operations caused by the operator rotating the wrench significantly. Brief Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0012] Figure 1 It is a schematic structural diagram of the cable tightening device;

[0013] Figure 2 It is a schematic diagram of the gear, rack and slide rail;

[0014] Figure 3 It is a cross-sectional view of the gear;

[0015] Figure 4 It is a schematic diagram of the wire clamp;

[0016] Figure 5 It is a schematic diagram of the angle steel clamp;

[0017] In the figure: protective cover 1, slide rail 2, gear 3, rack 4, gear shaft 5, U-shaped hanging ring 6, wire clamp 7, wrench 8, second ratchet 9, angle steel clamp 100, cable २००;

[0018] Spur gear 31, first ratchet 32, ball 33, spring 34;

[0019] Rack pin hole 41, rack slideway 42;

[0020] Key 51;

[0021] Pressing plate 71, bearing plate seat 72. Detailed Embodiments

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to the attached Figure 1 As shown, in one embodiment of the present invention, Embodiment 1:

[0024] The present invention provides a cable tightening device. During the cable tightening operation by an operator, it is installed on the angle steel where the cross arm of the pole tower is located, and the cable can be tightened by using this device. The cable tightening device includes a protective cover 1, a slide rail 2, a gear 3, a rack 4, a gear shaft 5, a wire clamp 7, a wrench 8, and an angle steel clamp 100; wherein: the gear 3 meshes with the rack 4 adapted thereto, and when the gear 3 rotates forward and backward, the rack 4 moves left and right; the rack 4 is installed in the slide rail 2, and its right end is connected to the wire clamp 7. The slide rail 2 restricts the up, down, front, and rear movement of the rack 4, and the wire clamp 7 clamps the cable 200 to fix it reliably; the bottom surface of the rack 4 is fixedly connected to the lower surface inside the protective cover 1. The middle positions of the front and rear side plates of the protective cover 1 are provided with shaft holes for installing the gear shaft 5, and its bottom is fixedly connected to the angle steel clamp 100. The gear 3 is rotatably installed at the middle position between the front and rear side plates inside the protective cover 1 through the gear shaft 5; the wrench 8 is installed at the front position of the gear shaft 5.

[0025] The cable tightening device is fixed to the angle steel where the cross arm of the pole tower is located through the angle steel clamp 100, and the cable 200 is clamped and reliably fixed by the wire clamp 7. Then, when the operator rotates the wrench 8 clockwise, the gear 3 is driven to rotate clockwise, thereby driving the rack 4 to move linearly to the left along the slide rail 2, so as to tighten the cable 200. Thus, the cable 200 realizes its pre-tightening operation requirements in the tightened state.

[0026] As a preferred structure of Embodiment 1, in one embodiment of the present invention, Embodiment 2:

[0027] A pin hole for connecting a U-shaped hanging ring 6 is opened at the right end of the rack 4. A pin shaft is used to hinge with the front and rear pin holes symmetrically opened at the left open end of the U-shaped hanging ring 6. And a screw hole is opened at the closed right end of the U-shaped hanging ring 6. A screw rod is installed in the screw hole where the U-shaped hanging ring 6 is located and is cooperatively connected with the screw hole opened in the left and right directions of the wire clamp 7.

[0028] The U-shaped hanging ring 6 can swing up and down along the pin shaft installed in the pin hole at the right end of the rack 4, thereby providing a structure for adjusting the angle for clamping and fixing the cable 200 on the wire clamp 7, thus improving its stress performance.

[0029] Based on Embodiment 2, in one embodiment of the present invention, please refer to the attached Figure 2 and 3 As shown in the figure, Embodiment 3:

[0030] The gear 3 adopts a spur gear 31, and the circumferential surface of its shaft is processed into a plurality of uniformly distributed sliding cavities adapted to the first ratchet wheel 32. The sliding cavity is a receiving space opened along the tangential direction of the circumferential surface of its shaft. Furthermore, the ball 33 where the first ratchet wheel 32 is located is restricted to roll on the inner surface of the sliding cavity; the circumferential surface of the first ratchet wheel 32 is processed into a plurality of uniformly distributed mounting holes for the springs 34 that match the sliding cavity. An axial hole for mounting the gear shaft 5 is opened on its shaft, and a keyway is opened on this axial hole; when the ball 33 rolls on the inner surface of the sliding cavity, it simultaneously makes an axial movement in the mounting hole; the spring 34 is mounted in the mounting hole, and the ball 33 is connected to the spring 34; the front part of the gear shaft 5 is processed into a hexagon, and a keyway is opened on its shaft, and then it is connected to the first ratchet wheel 32 through a key 51; one end of the wrench 8 has a hexagonal hole that matches the hexagonal front part of the gear shaft 5; a second ratchet wheel 9 is installed at the middle position of the left end of the protective cover 1, and the second ratchet wheel 9 meshes with the spur gear 31 to brake the counterclockwise rotation of the spur gear 31; a rack pin hole 41 is opened in the right part of the rack 4, and rack slideways 42 are opened in the lower parts of its front and rear surfaces. The slide rail 2 is processed into an inverted T-shaped groove, and the rack slideway 42 is installed in a matching manner with the inverted T-shaped groove.

[0031] For the above cable tightening device, the range of rotation of the wrench 8 by the operator is further reduced. Through the structure of the first ratchet wheel 32 and the gear 3, the wrench 8 can be rotated repeatedly in a small range to drive the gear 3 to drive the rack 4 to move leftward. When the tightening requirement of the cable 200 is reached, the rotation of the wrench 8 is restricted by the locking effect of the second ratchet wheel 9 on the spur gear 31. This structure avoids the potential safety hazard of high-altitude operation caused by the operator rotating the wrench greatly. In addition, the structure of the rack slideway 42 and the inverted T-shaped groove not only realizes the left-right linear sliding of the rack 4 but also restricts the movement of the rack 4 in other directions.

[0032] The above structure can be replaced by a sprocket structure such as that at the pedal of a bicycle. The rack 4 is matched with a chain. Correspondingly, the chain should be placed in a slideway that matches it, but the reliability of this structure is slightly worse.

[0033] Based on Embodiment 3, in one embodiment of the present invention, please refer to the attached Figure 4 As shown in the figure, Embodiment 4:

[0034] The wire clamp 7 includes a pressing plate 71 and a bearing plate seat 72; a pair of screw holes are provided at positions near the front and rear ends of the bearing plate seat 72, and a through hole is provided on its left and right surfaces; the middle part of the pressing plate 71 is bent into an arc surface, and through holes corresponding to the pair of screw holes where the bearing plate seat 72 is located are also provided at its front and rear parts, and a bolt member is installed therein to connect it with the U-shaped hanging ring 6; the pressing plate 71 and the bearing plate seat 72 are connected by a front fastening bolt and a rear fastening bolt. The cable 200 is placed at the position of the arc surface where the pressing plate 71 is located. After the front fastening bolt and the rear fastening bolt are tightened, the cable 200 is clamped and fixed between the pressing plate 71 and the bearing plate seat 72.

[0035] Preferably, a plurality of anti-slip protrusions (not shown in the figure) are provided on the contact surfaces of the pressing plate 71 and the bearing plate seat 72 with the cable 200.

[0036] Based on Embodiment 3, in one embodiment of the present invention, please refer to the attached Figure 5 As shown, Embodiment 5:

[0037] The angle steel clamp 100 includes an outer plate 101 and an inner plate 102 in a right-angle bending shape, and corresponding screw holes are provided on each surface thereof. The outer plate 101 and the inner plate 102 are fastened by angle steel bolts, and then the angle steel on the electric pole is clamped and fixed therebetween.

[0038] In the above embodiments, square holes for weight reduction are provided symmetrically on the front and rear surfaces of the protective cover 1, which is beneficial for cleaning foreign matters therein.

[0039] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cable tightening device, characterized in that, It includes a protective cover (1), a slide rail (2), a gear (3), a rack (4), a gear shaft (5), a wire clamp (7), a wrench (8) and an angle steel clamp (100); the gear (3) meshes with the rack (4) adapted to it; the rack (4) is installed in the slide rail (2), and its right end is connected with a wire clamp (7); the wire clamp (7) clamps the cable (200) to fix it reliably; the bottom surface of the rack (4) is fixedly connected to the lower part inside the protective cover (1), shaft holes for installing the gear shaft (5) are provided in the middle positions of the front and rear side plates of the protective cover (1), and its bottom is fixedly connected to the angle steel clamp (100), and the gear (3) is rotatably installed at the middle position between the front and rear side plates inside the protective cover (1) through the gear shaft (5); the wrench (8) is installed at the front part of the gear shaft (5).

2. The cable tensioning device according to claim 1, characterized in that, A pin hole for connecting a U-shaped hanging ring (6) is provided at the right end of the rack (4), and it is hinged to the front and rear pin holes symmetrically opened at the left opening end of the U-shaped hanging ring (6) through a pin shaft, and a screw hole is provided at the closed end on the right side of the U-shaped hanging ring (6), and it is installed in the screw hole where the U-shaped hanging ring (6) is located through a screw rod and is connected in cooperation with the screw hole opened in the left-right direction of the wire clamp (7).

3. The cable tightening device according to claim 2, wherein The gear (3) adopts a spur gear (31); a plurality of uniformly distributed sliding cavities adapted to the first ratchet wheel (32) are machined on the circular surface of the shaft part of the spur gear (31), and the sliding cavity is a receiving space opened along the tangential direction of the circular surface of its shaft part, and then the ball (33) where the first ratchet wheel (32) is located is restricted to roll on the inner surface of the sliding cavity; a plurality of uniformly distributed mounting holes for springs (34) matching the sliding cavity are machined on the circular surface of the first ratchet wheel (32), a shaft hole for installing the gear shaft (5) is provided on its shaft part, and a key groove is provided on the shaft hole; the spring (34) is installed in the mounting hole, and the ball (33) is connected with the spring (34); the front part of the gear shaft (5) is machined into a hexagon, and a key groove is provided on its shaft, and then it is connected in cooperation with the first ratchet wheel (32) through a key (51); one end of the wrench (8) has a hexagonal hole matching the hexagonal front part of the gear shaft (5); a second ratchet wheel (9) is installed at the middle position on the left end of the protective cover (1), and the second ratchet wheel (9) meshes with the spur gear (31); a rack pin hole (41) is provided in the right part of the rack (4), and rack slideways (42) are provided in the lower parts of its front and rear surfaces, and the slide rail (2) is processed into an inverted T-shaped groove, and then the rack slideways (42) are installed in matching with the inverted T-shaped groove.

4. A cable tensioning device according to claim 3, wherein, The wire clamp (7) includes a pressing plate (71) and a bearing plate seat (72); a pair of screw holes are provided at positions near the front and rear ends of the bearing plate seat (72), and a through hole is provided on its left and right surfaces; the middle part of the pressing plate (71) is bent into an arc surface, and through holes corresponding to the pair of screw holes where the bearing plate seat (72) is located are also provided at its front and rear parts, and a bolt member is installed therein to connect it with the U-shaped hanging ring (6); the pressing plate (71) and the bearing plate seat (72) are connected by a front fastening bolt and a rear fastening bolt; the cable wire (200) is clamped and fixed between the pressing plate (71) and the bearing plate seat (72).

5. A cable tightening device according to claim 4, characterized in that, A plurality of anti-slip convex portions are provided on the contact surfaces of the pressing plate (71) and the bearing plate seat (72) with the cable wire (200).

6. The cable tightening device according to claim 5, characterized in that, The angle steel clamp (100) includes an outer plate (101) and an inner plate (102) bent in a right-angled shape, and corresponding screw holes are provided on each surface, and the outer plate (101) and the inner plate (102) are fastened by angle steel bolts.

7. A cable tensioning device according to any one of claims 1-6, characterized in that, Square holes for weight reduction are provided symmetrically on the front and rear surfaces of the protective cover (1).

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