CN215565658U - Ladder is hung in maintenance of electric power construction usefulness - Google Patents

Abstract

The utility model belongs to the technical field of hanging ladders, and particularly relates to a maintenance hanging ladder for electric power construction, which comprises a telescopic ladder, a telescopic connection structure and a hanging buckle mechanism, wherein the telescopic ladder consists of a bottom ladder, a top ladder which is slidably arranged on the bottom ladder, a limiting mechanism which is used for limiting the sliding of the bottom ladder and the top ladder, and a first pull rope which is used for controlling the sliding of the top ladder relative to the bottom ladder; when the hanging ladder designed by the utility model is used, the four hook mechanisms are firstly controlled to wrap the two cables, after the cables are wrapped, the extension or shortening of the telescopic inner plate and the telescopic outer plate is controlled according to the specific situation of the space between the two cables, and the two cables are spread or tensioned, so that the hanging ladder can not shake due to the loose state of the hanging cables when workers climb the hanging ladder.

Description

Ladder is hung in maintenance of electric power construction usefulness

Technical Field

The utility model belongs to the technical field of hanging ladders, and particularly relates to a maintenance hanging ladder for power construction.

Background

The upper part of the hanging ladder is provided with a hook, and the lower part of the hanging ladder is provided with anti-skid measures. The ladder of hanging that current maintenance cable used is extending structure, through flexible on the one hand portable and transportation, on the other hand multiplicable height of hanging the ladder.

In an outdoor working site, for equipment such as an isolating switch, a lightning rod, a breaker and the like, a wire pole is often higher, workers can work after climbing a height, an insulating ladder is needed for assistance at the moment, and in order to ensure that the ladder cannot topple to cause safety accidents during working, a person needs to support the lower end of the ladder, and another person climbs the ladder to fix a hook at the top end of the ladder with a cable; this method is laborious and less safe.

Moreover, as shown in a in fig. 16, the existing hanging ladder is often fixed on a cable, and even if the hook at the top end of the ladder is fixed with the cable, the hanging ladder can shake due to the looseness of the cable when a worker climbs.

The utility model designs a maintenance hanging ladder for power construction to solve the problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model discloses a maintenance hanging ladder for electric power construction, which is realized by adopting the following technical scheme.

A maintenance hanging ladder for electric power construction comprises a telescopic ladder, a telescopic connection structure and a hanging buckle mechanism, wherein the telescopic ladder consists of a bottom ladder, a top ladder which is slidably arranged on the bottom ladder, a limiting mechanism which is used for limiting the sliding of the bottom ladder and the top ladder, and a first pull rope which is used for controlling the sliding of the top ladder relative to the bottom ladder; two first guide wheels are rotatably mounted on two sides of the upper end of the bottom ladder, one ends of the two first pull ropes are fixedly mounted at the lower end of the top ladder, and the other ends of the first pull ropes upwards pass through the bottom ladder downwards after bypassing the first guide wheels.

The telescopic connecting structure is arranged at the upper end of the top ladder in a swinging mode through a second rotating shaft, a worm wheel is fixedly arranged at one end of the second rotating shaft, a third rotating shaft is rotatably arranged on the upper end face of the top ladder through a fixed support, a worm is arranged on the third rotating shaft, and the worm is meshed with the worm wheel; the two first winding wheels are fixedly arranged on the third rotating shaft and positioned at two ends of the worm, and two ends of the sixth pull rope are wound on the two first winding wheels in opposite directions.

The telescopic connecting structure consists of a telescopic inner plate and a telescopic outer plate, the telescopic outer plate is arranged on the second rotating shaft in a swinging mode, the telescopic inner plate is arranged on the telescopic outer plate in a sliding mode, and a third spring is arranged between the telescopic inner plate and the telescopic outer plate; the telescopic outer plate is provided with a second grid gap, one end of the telescopic plate is fixedly provided with a mounting strip, a second winding wheel is rotatably mounted on the mounting strip through a fourth rotating shaft, one side of the mounting strip is provided with a second mounting sliding shell, a second positioning block is slidably mounted in the second mounting sliding shell, a fourth spring is mounted between the second positioning block and the second mounting sliding shell, a fifth pull rope is fixedly mounted on the second positioning block, and the other end of the fifth pull rope is wound on the second winding wheel; the second positioning block is matched with a second grating notch on the telescopic outer plate; the third winding wheel is fixedly arranged on the fourth rotating shaft, the sixth guide wheel and the seventh guide wheel are rotatably arranged on the telescopic outer plate, one end of the fourth pull rope is wound on the third winding wheel, and the other end of the fourth pull rope is positioned outside the telescopic outer plate through the sixth guide wheel and the seventh guide wheel.

Two hook mechanisms are symmetrically arranged on one side of the upper end of the top ladder and the lower side of one end of the telescopic inner plate respectively.

The hook mechanism comprises a third pull rope, an arc-shaped inner plate, an arc-shaped outer plate, a fourth guide wheel, a fixing plate, a fifth guide wheel, a first spring, a first positioning block, a first mounting sliding shell and a second spring, wherein the arc-shaped outer plate is fixedly mounted on the telescopic inner plate and the top ladder through the fixing plate, the arc-shaped outer plate is of an annular structure with notches, and first grid notches which are uniformly distributed are formed in the arc surface of the arc-shaped outer plate; the arc inner plate is slidably arranged on the arc outer plate, and a first spring is arranged between the arc inner plate and the arc outer plate; a first mounting sliding shell is mounted on one side of the arc-shaped inner plate, a first positioning block is slidably mounted in the first mounting sliding shell, and a second spring is mounted between the first positioning block and the first mounting sliding shell; the fourth guide wheel and the fifth guide wheel are rotatably arranged on the outer arc surface of the arc-shaped outer plate, a third pull rope is fixedly arranged on the first positioning block, and the other end of the third pull rope is positioned on the lower sides of the arc-shaped outer plate and the arc-shaped inner plate through the guide of the fourth guide wheel and the fifth guide wheel; the first locating block is matched with a first grating notch on the arc-shaped outer plate.

As a further improvement of the technology, two first sliding grooves are fixedly arranged on two sides of the bottom ladder, and the top ladder is slidably arranged on the bottom ladder through the two first sliding grooves; two symmetrical mounting lugs are fixedly mounted at the two sides of the lower end of the top ladder, and one end of the first pull rope is fixedly mounted on the mounting lug at the corresponding side.

As a further improvement of the technology, the limiting mechanism comprises a second guide wheel, a second pull rope, a connecting sleeve, a volute spiral spring, a first rotating shaft, a limiting fixture block and a limiting block, wherein the first rotating shaft is rotatably arranged on the top ladder, and the volute spiral spring is arranged between the first rotating shaft and the bottom ladder; the upper side of one end of the limiting block is provided with an inclined plane, the limiting block is arranged on the first rotating shaft in a swinging mode, and a limiting clamping block is arranged between the upper side of the limiting block and the top ladder; the connecting sleeve is rotatably installed at one end of the limiting block, the two second guide wheels are rotatably installed on the step surface of the bottom ladder, one end of the second pull rope is fixedly installed on the connecting sleeve, and the other end of the second pull rope penetrates out of the lower end of the top ladder through the two second guide wheels.

As a further improvement of this technique, an anti-drop plate for preventing the sixth rope from dropping off the two first winding wheels is attached to the upper end of the top ladder.

As a further improvement of the technology, the finally penetrated third pull rope in the two hook mechanisms installed on the telescopic inner plate is positioned at the lower end of the bottom ladder through the guide of a plurality of third guide wheels installed on the telescopic inner plate and the telescopic outer plate.

And the third guide wheels are respectively provided with a U-shaped anti-falling plate for preventing the third pull rope from falling off from the third guide wheels.

As a further improvement of the technology, the arc-shaped outer plate is provided with a second sliding groove, and the arc-shaped inner plate is slidably mounted on the arc-shaped outer plate through the second sliding groove; for the two hook mechanisms arranged on the top ladder, guide arc strips which play a role of guiding a third pull rope passing through a fifth guide wheel are fixedly arranged on the arc inner plates of the two hook mechanisms; for the two hook mechanisms arranged on the telescopic inner plate, guide arc strips which play a role of guiding a third pull rope passing through a fifth guide wheel are fixedly arranged on the arc inner plate; and a guide shell which plays a role of guiding the third pull rope passing through the fourth guide wheel is fixedly arranged on the fixed plate.

As a further improvement of the technology, two third sliding grooves are fixedly arranged on two sides of the telescopic outer plate, and the telescopic inner plate is slidably arranged on the telescopic outer plate through the two third sliding grooves.

Compared with the traditional ladder hanging technology, the design of the utility model has the following beneficial effects:

1. when the hanging ladder designed by the utility model is used, the four hook mechanisms are firstly controlled to wrap the two cables, after the cables are wrapped, the extension or shortening of the telescopic inner plate and the telescopic outer plate is controlled according to the specific situation of the space between the two cables, and the two cables are spread or tensioned, so that the hanging ladder can not shake due to the loose state of the hanging cables when workers climb the hanging ladder.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the telescopic ladder structure.

Fig. 3 is a schematic view of a bottom ladder structure.

Fig. 4 is a schematic view of a top ladder structure.

Fig. 5 is a schematic structural diagram of the limiting mechanism.

Fig. 6 is a schematic view of the fixed support mounting.

Fig. 7 is a schematic view of worm gear fit.

Figure 8 is a schematic view of the buckle mechanism installation.

Fig. 9 is a schematic structural view of the buckle mechanism.

Fig. 10 is a schematic structural view of an arc-shaped outer plate.

FIG. 11 is a schematic view of the structure of the inner arc plate.

Fig. 12 is a schematic view of the third cord distribution.

Fig. 13 is a schematic view of a telescopic connection structure.

FIG. 14 is a schematic view of the second positioning block being installed.

Fig. 15 is a schematic structural view of the outer telescopic plate and the inner telescopic plate.

Fig. 16 is a schematic diagram of the working principle of the device.

Number designation in the figures: 1. an extension ladder; 2. a telescopic connection structure; 3. a hanging and buckling mechanism; 4. a limiting mechanism; 5. a bottom ladder; 6. a top ladder; 7. a first chute; 8. mounting a support lug; 9. a first pull cord; 10. a first guide wheel; 11. a second guide wheel; 12. a second pull cord; 13. connecting sleeves; 14. a volute spiral spring; 15. a first rotating shaft; 16. a limiting clamping block; 17. a limiting block; 18. fixing and supporting; 19. a worm gear; 20. a second rotating shaft; 21. a first winding wheel; 22. a third rotating shaft; 23. a worm; 24. an anti-falling plate; 25. a third guide wheel; 26. a U-shaped anti-drop plate; 27. a third pull cord; 28. an arc-shaped inner plate; 29. an arc-shaped outer plate; 30. a fourth guide wheel; 31. a fixing plate; 32. a fifth guide wheel; 33. a first spring; 34. a second chute; 35. a first grid gap; 36. guiding the arc strip; 37. a first positioning block; 38. a first mounting shoe; 39. a second spring; 40. a guide housing; 41. a telescopic inner plate; 42. a telescopic outer plate; 43. a third spring; 44. mounting a bar; 45. a second winding wheel; 46. a fourth rotating shaft; 47. a third winding wheel; 48. a sixth guide wheel; 49. a seventh leading wheel; 50. a fourth pull cord; 51. a fifth draw cord; 52. a fourth spring; 53. a second positioning block; 54. a second mounting sliding shell; 55. a second grid gap; 56. a third chute; 57. and a sixth pull rope.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples or figures are illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the extension ladder 1 comprises an extension ladder 1, an extension connecting structure 2 and a hanging buckle mechanism 3, wherein as shown in fig. 2, the extension ladder 1 consists of a bottom ladder 5, a top ladder 6 slidably mounted on the bottom ladder 5, a limiting mechanism 4 for limiting the sliding of the bottom ladder 5 and the top ladder 6, and a first pull rope 9 for controlling the sliding of the top ladder 6 relative to the bottom ladder 5; as shown in fig. 4, two first guide wheels 10 are rotatably mounted on two sides of the upper end of the bottom ladder 5, one end of each of the two first pull ropes 9 is fixedly mounted at the lower end of the top ladder 6, and the other end of each of the first pull ropes 9 passes through the bottom ladder 5 after going up around the first guide wheels 10.

In the present invention, if the extended top ladder 6 is to be retracted, the first pull rope 9 is first pulled so that the top ladder 6 is moved upward relative to the bottom ladder 5 by a distance that allows the stopper 17 to swing about the first pivot 15 to contact the step surface of the bottom ladder 5; after the top ladder 6 moves up by one section, the second pull rope 12 is pulled, the second pull rope 12 is guided by the second guide wheel 11 to pull the limiting block 17 to swing around the first rotating shaft 15, the limiting block 17 swings to be completely dislocated with the step of the bottom ladder 5, and then the top ladder 6 moves down and retracts under the action of self gravity.

The limiting clamping plate has the function of limiting the upper end of one end, provided with the inclined surface, of the limiting block 17; the connecting sleeve 13 has the function that when the second pull rope 12 pulls the limiting block 17 to swing, the smoothness of pulling of the second pull rope 12 can be ensured through the rotation of the connecting sleeve 13.

As shown in fig. 6, the telescopic connection structure 2 is installed at the upper end of the top ladder 6 in a swinging manner through a second rotating shaft 20, a worm wheel 19 is fixedly installed at one end of the second rotating shaft 20, a third rotating shaft 22 is rotatably installed on the upper end surface of the top ladder 6 through a fixed support 18, as shown in fig. 7, a worm 23 is installed on the third rotating shaft 22, and the worm 23 is meshed with the worm wheel 19; the two first winding wheels 21 are fixedly installed on the third rotating shaft 22 and located at both ends of the worm 23, and both ends of the sixth rope 57 are wound around the two first winding wheels 21 in opposite directions.

The utility model ensures that the swing of the telescopic connecting structure 2 has a self-locking function through the matching of the worm wheel 19 and the worm 23.

As shown in fig. 13 and 15, the telescopic connection structure 2 is composed of two parts, namely a telescopic inner plate 41 and a telescopic outer plate 42, the telescopic outer plate 42 is installed on the second rotating shaft 20 in a swinging mode, the telescopic inner plate 41 is installed on the telescopic outer plate 42 in a sliding mode, and a third spring 43 is installed between the telescopic inner plate 41 and the telescopic outer plate 42; the telescopic outer plate 42 is provided with a second grating gap 55, as shown in fig. 14, one end of the telescopic plate is fixedly provided with a mounting bar 44, the mounting bar 44 is rotatably provided with a second winding wheel 45 through a fourth rotating shaft 46, one side of the mounting bar 44 is provided with a second mounting sliding shell 54, a second positioning block 53 is slidably mounted in the second mounting sliding shell 54, a fourth spring 52 is mounted between the second positioning block 53 and the second mounting sliding shell 54, a fifth pull rope 51 is fixedly mounted on the second positioning block 53, and the other end of the fifth pull rope 51 is wound on the second winding wheel 45; the second positioning block 53 is matched with a second grating notch 55 on the telescopic outer plate 42; the third winding wheel 47 is fixedly installed on the fourth rotating shaft 46, the sixth guide wheel 48 and the seventh guide wheel 49 are rotatably installed on the telescopic outer plate 42, one end of the fourth rope 50 is wound on the third winding wheel 47, and the other end of the fourth rope 50 passes through the sixth guide wheel 48 and the seventh guide wheel 49 and is located outside the telescopic outer plate 42.

The third spring 43 serves to return the telescopic inner plate 41 and the telescopic outer plate 42 to the extended position.

In the utility model, the fourth spring 52 has pre-pressure, and in an initial state, the lower end of the second positioning block 53 is inserted into one second grid notch 55 on the telescopic outer plate 42 under the action of the fourth spring 52, and the telescopic inner plate 41 and the telescopic outer plate 42 are limited in telescopic way through the matching of the second positioning block 53 and the second grid notch 55; when the limit of the second positioning block 53 on the telescopic inner plate 41 and the telescopic outer plate 42 needs to be released, the fourth pull rope 50 is pulled, the fourth pull rope 50 drives the third winding wheel 47 to rotate under the guiding action of the sixth guide wheel 48 and the seventh guide wheel 49, the third winding wheel 47 rotates to drive the fourth rotating shaft 46 to rotate, the fourth rotating shaft 46 rotates to drive the second winding wheel 45 to rotate, the second winding wheel 45 rotates to wind the fifth pull rope 51 wound on the second winding wheel 45, the fifth pull rope 51 winds to pull the second positioning block 53, and because in an initial state, the second positioning block 53 limits the telescopic inner plate 41 and the telescopic outer plate 42 in a stretching mode, the second positioning block 53 cannot pull the telescopic inner plate 41 to stretch relative to the telescopic outer plate 42, and at the moment, the fifth pull rope 51 pulls the second positioning block 53 to move upwards to release the limit of the telescopic inner plate 41 and the telescopic outer plate 42; after the limit of the inner telescopic plate 41 and the outer telescopic plate 42 is released, the fifth rope 51 can be extended by driving the inner telescopic plate 41 to slide relative to the outer telescopic plate 42 through the second positioning block 53 and the second mounting slider 54.

As shown in fig. 8, two hook mechanisms are symmetrically installed on one side of the upper end of the top ladder 6 and the lower side of one end of the telescopic inner plate 41.

As shown in fig. 9 and 12, the hook mechanism includes a third rope 27, an arc inner plate 28, an arc outer plate 29, a fourth guide wheel 30, a fixing plate 31, a fifth guide wheel 32, a first spring 33, a first positioning block 37, a first mounting sliding shell 38, and a second spring 39, wherein as shown in fig. 10, the arc outer plate 29 is fixedly mounted on a telescopic inner plate 41 and a top ladder 6 through the fixing plate 31, the arc outer plate 29 is of an annular structure with notches, and the arc surface of the arc outer plate 29 has first grid notches 35 uniformly distributed thereon; as shown in fig. 9 and 12, the arc inner plate 28 is slidably mounted on the arc outer plate 29, and a first spring 33 is mounted between the arc inner plate 28 and the arc outer plate 29; as shown in fig. 11, a first mounting sliding shell 38 is mounted on one side of the arc inner plate 28, a first positioning block 37 is slidably mounted in the first mounting sliding shell 38, and a second spring 39 is mounted between the first positioning block 37 and the first mounting sliding shell 38; the fourth guide wheel 30 and the fifth guide wheel 32 are rotatably mounted on the outer arc surface of the arc-shaped outer plate 29, the first positioning block 37 is fixedly mounted with a third pull rope 27, and the other end of the third pull rope 27 is positioned at the lower sides of the arc-shaped outer plate 29 and the arc-shaped inner plate 28 through the guide of the fourth guide wheel 30 and the fifth guide wheel 32; the first positioning block 37 is engaged with the first grill notches 35 on the arc-shaped outer plate 29.

The first spring 33 plays a role in resetting the arc outer plate 29 and the arc inner plate 28; the second spring 39 has pre-pressure, and in an initial state, under the action of the second spring 39, the lower end of the first positioning block 37 is inserted into one of the first grid notches 35 on the arc-shaped outer plate 29, and the sliding of the arc-shaped inner plate 28 and the arc-shaped outer plate 29 is limited through the matching of the first positioning block 37 and the first grid notches 35; when the limit of the first positioning block 37 on the arc-shaped inner plate 28 and the arc-shaped outer plate 29 needs to be released, the third pull rope 27 is pulled, the third pull rope 27 pulls the first positioning block 37 through the guiding action of the fourth guide wheel 30 and the fifth guide wheel 32, and because the first positioning block 37 is limited by the sliding of the arc-shaped inner plate 28 and the arc-shaped outer plate 29 in the initial state, the first positioning block 37 cannot pull the arc-shaped inner plate 28 to slide relative to the arc-shaped outer plate 29, and at the moment, the third pull rope 27 pulls the first positioning block 37 to slide, so that the limit on the arc-shaped inner plate 28 and the arc-shaped outer plate 29 is released; after the limit of the arc inner plate 28 and the arc outer plate 29 is released, the first pull rope can drive the arc inner plate 28 to slide relative to the arc outer plate 29 through the first positioning block 37 and the first mounting sliding shell 38 to extend, and an annular structure is formed by the arc inner plate 28 and the arc outer plate 29.

As shown in fig. 3, two first sliding chutes 7 are fixedly installed at both sides of the bottom ladder 5, and as shown in fig. 2 and 4, the top ladder 6 is slidably installed on the bottom ladder 5 through the two first sliding chutes 7; two mounting lugs 8 are symmetrically and fixedly mounted on two sides of the lower end of the top ladder 6, and one end of a first pull rope 9 is fixedly mounted on the mounting lug 8 on one corresponding side.

As shown in fig. 5, the limiting mechanism 4 includes a second guide wheel 11, a second pull rope 12, a connecting sleeve 13, a volute spiral spring 14, a first rotating shaft 15, a limiting fixture block 16, and a limiting block 17, wherein the first rotating shaft 15 is rotatably mounted on the top ladder 6, and the volute spiral spring 14 is mounted between the first rotating shaft 15 and the bottom ladder 5; an inclined plane is arranged on the upper side of one end of the limiting block 17, the limiting block 17 is arranged on the first rotating shaft 15 in a swinging mode, and a limiting clamping block 16 is arranged between the upper side of the limiting block 17 and the top ladder 6; one end of the limiting block 17 is rotatably provided with a connecting sleeve 13, the two second guide wheels 11 are rotatably arranged on the step surface of the bottom ladder 5, one end of the second pull rope 12 is fixedly arranged on the connecting sleeve 13, and the other end of the second pull rope 12 penetrates out from the lower end of the top ladder 6 through the two second guide wheels 11.

As shown in fig. 7, an anti-drop plate 24 for preventing the sixth rope 57 from dropping off the two first winding wheels 21 is attached to the upper end of the top step 6.

The third rope 27 finally passed out of the two hook mechanisms mounted on the inner telescopic plate 41 is guided by a plurality of third guide wheels 25 mounted on the inner telescopic plate 41 and the outer telescopic plate 42 and is positioned at the lower end of the bottom ladder 5.

As shown in fig. 8, a U-shaped stopper plate 26 for preventing the third rope 27 from falling off the third guide pulley 25 is attached to each of the third guide pulleys 25.

As shown in fig. 10, the arc outer plate 29 has a second sliding slot 34, and the arc inner plate 28 is slidably mounted on the arc outer plate 29 through the second sliding slot 34; as shown in fig. 9 and 12, for the two hook mechanisms installed on the top ladder 6, the guide arc strips 36 for guiding the third pull rope 27 after passing through the fifth guide wheel 32 are fixedly installed on the arc inner plates 28; for the two hook mechanisms arranged on the telescopic inner plate 41, the arc inner plate 28 is fixedly provided with a guide arc strip 36 which plays a role of guiding the third pull rope 27 passing through the fifth guide wheel 32; a guide case 40 for guiding the third rope 27 passing through the fourth guide pulley 30 is fixedly mounted on the fixed plate 31.

As shown in fig. 15, two third sliding grooves 56 are fixedly mounted on both sides of the outer telescopic plate 42, and the inner telescopic plate 41 is slidably mounted on the outer telescopic plate 42 through the two third sliding grooves 56.

When the hanging ladder designed by the utility model is used, the four hook mechanisms are firstly controlled to wrap the two cables, after the cables are wrapped, the extension or shortening of the inner telescopic plate 41 and the outer telescopic plate 42 is controlled according to the specific situation of the space between the two cables, and the two cables are stretched or tensioned, so that the hanging ladder can not shake due to the loose state of the hanging cables when workers climb the hanging ladder. If the distance between the two cables is larger, the connection phenomenon can not occur after the two cables are tensioned, and the two cables can be controlled to be tensioned at the moment; if the distance between the two cables is small, the connection phenomenon may occur after the two cables are tensioned, and the two cables need to be controlled to be spread.

The specific working process is as follows: when the hanging ladder designed by the utility model is used, the first pull rope 9 is pulled firstly, the first pull rope 9 can pull the top ladder 6 upwards through the mounting lugs 8 under the guidance of the first guide wheel 10, and the top ladder 6 extends out relative to the bottom ladder 5; in the extending process, the limiting blocks 17 in the limiting mechanisms 4 at the two sides can be sequentially contacted with the steps on the bottom ladder 5; after contacting, stopper 17 is extruded by the step of bottom ladder 5 and is swung down round first pivot 15 under the effect of its upper inclined plane, and after the step crossed stopper 17, stopper 17 resets under the effect of volute spiral spring 14, and stopper 17 is spacing through the downward shift retraction of its downside straight face and step to top ladder 6.

After the bottom ladder 5 and the top ladder 6 are unfolded, the fourth pull rope 50 is pulled, the fourth pull rope 50 drives the third winding wheel 47 to rotate under the guiding action of the sixth guide wheel 48 and the seventh guide wheel 49, the third winding wheel 47 drives the fourth rotating shaft 46 to rotate, the fourth rotating shaft 46 drives the second winding wheel 45 to rotate, the second winding wheel 45 rotates to wind the fifth pull rope 51 wound on the second winding wheel 45, the fifth pull rope 51 is wound to pull the second positioning block 53, and because the second positioning block 53 limits the extension and retraction of the telescopic inner plate 41 and the telescopic outer plate 42 in an initial state, the second positioning block 53 cannot pull the telescopic inner plate 41 to extend and retract relative to the telescopic outer plate 42, and at the moment, the fifth pull rope 51 pulls the second positioning block 53 to move upwards to release the limit of the telescopic inner plate 41 and the telescopic outer plate 42; after the limit of the inner telescopic plate 41 and the outer telescopic plate 42 is released, the fifth rope 51 can be extended by driving the inner telescopic plate 41 to slide relative to the outer telescopic plate 42 through the second positioning block 53 and the second mounting slider 54.

After the telescopic inner plate 41 and the telescopic outer plate 42 are extended, the sixth pulling rope 57 is pulled, so that the sixth pulling rope 57 pulls one of the two first winding wheels 21 to rotate, the other winding wheel is driven by the rotation of the winding wheel through the third rotating shaft 22 to rotate, the sixth pulling rope 57 is wound, meanwhile, the third rotating shaft 22 drives the worm 23 to rotate when being driven to rotate, the worm 23 drives the worm wheel 19 to rotate, the worm wheel 19 drives the second rotating shaft 20 to rotate, the second rotating shaft 20 drives the telescopic outer plate 42 to swing, and the telescopic outer plate 42 swings to drive the telescopic inner plate 41 to swing; the telescopic inner plate 41 and the telescopic outer plate 42 are lapped between the two cables; then, the fourth pull rope 50 is slowly loosened, so that the second positioning block 53 is shortened under the action of the third spring 43 under the condition that the telescopic inner plate 41 and the telescopic outer plate 42 are not limited, and the arc-shaped outer plates 29 on the four hook mechanisms arranged on the top ladder 6 and the telescopic inner plate 41 are clamped on the two cables in the shortening process.

After the arc-shaped outer plates 29 in the four hook mechanisms are clamped on two cables, the third pull rope 27 is pulled, the third pull rope 27 pulls the first positioning block 37 under the guiding action of the fourth guide wheel 30 and the fifth guide wheel 32, and because the first positioning block 37 limits the sliding of the arc-shaped inner plate 28 and the arc-shaped outer plate 29 in an initial state, the first positioning block 37 cannot pull the arc-shaped inner plate 28 to slide relative to the arc-shaped outer plate 29, and at the moment, the third pull rope 27 pulls the first positioning block 37 to slide, so that the limitation of the arc-shaped inner plate 28 and the arc-shaped outer plate 29 is released; after the limit of the arc inner plate 28 and the arc outer plate 29 is released, the first pull rope can drive the arc inner plate 28 to slide relative to the arc outer plate 29 through the first positioning block 37 and the first mounting sliding shell 38 to extend, and the cable is wrapped.

As shown in b and c in 16 of fig. 16, after the cables are wrapped, the inner telescopic plate 41 and the outer telescopic plate 42 are controlled to extend or shorten again to stretch or tighten the two cables, so that the hanging ladder is ensured not to shake due to the loose state of the hanging cables when workers climb the hanging ladder.

Claims (7)

1. The utility model provides a ladder is hung in maintenance that electric power construction used which characterized in that: the extension ladder comprises an extension ladder, an extension connecting structure and a hanging buckle mechanism, wherein the extension ladder consists of a bottom ladder, a top ladder which is slidably arranged on the bottom ladder, a limiting mechanism which is used for limiting the sliding of the bottom ladder and the top ladder, and a first pull rope which is used for controlling the top ladder to slide relative to the bottom ladder; two first guide wheels are rotatably mounted on two sides of the upper end of the bottom ladder, one ends of two first pull ropes are fixedly mounted at the lower end of the top ladder, and the other ends of the first pull ropes pass out of the bottom ladder downwards after passing around the first guide wheels upwards;

the telescopic connecting structure is arranged at the upper end of the top ladder in a swinging mode through a second rotating shaft, a worm wheel is fixedly arranged at one end of the second rotating shaft, a third rotating shaft is rotatably arranged on the upper end face of the top ladder through a fixed support, a worm is arranged on the third rotating shaft, and the worm is meshed with the worm wheel; the two first winding wheels are fixedly arranged on the third rotating shaft and positioned at two ends of the worm, and two ends of the sixth pull rope are wound on the two first winding wheels in opposite directions;

the telescopic connecting structure consists of a telescopic inner plate and a telescopic outer plate, the telescopic outer plate is arranged on the second rotating shaft in a swinging mode, the telescopic inner plate is arranged on the telescopic outer plate in a sliding mode, and a third spring is arranged between the telescopic inner plate and the telescopic outer plate; the telescopic outer plate is provided with a second grid gap, one end of the telescopic plate is fixedly provided with a mounting strip, a second winding wheel is rotatably mounted on the mounting strip through a fourth rotating shaft, one side of the mounting strip is provided with a second mounting sliding shell, a second positioning block is slidably mounted in the second mounting sliding shell, a fourth spring is mounted between the second positioning block and the second mounting sliding shell, a fifth pull rope is fixedly mounted on the second positioning block, and the other end of the fifth pull rope is wound on the second winding wheel; the second positioning block is matched with a second grating notch on the telescopic outer plate; the third winding wheel is fixedly arranged on the fourth rotating shaft, the sixth guide wheel and the seventh guide wheel are rotatably arranged on the telescopic outer plate, one end of a fourth pull rope is wound on the third winding wheel, and the other end of the fourth pull rope is positioned outside the telescopic outer plate through the sixth guide wheel and the seventh guide wheel;

two hook mechanisms are symmetrically arranged on one side of the upper end of the top ladder and the lower side of one end of the telescopic inner plate respectively;

the hook mechanism comprises a third pull rope, an arc-shaped inner plate, an arc-shaped outer plate, a fourth guide wheel, a fixing plate, a fifth guide wheel, a first spring, a first positioning block, a first mounting sliding shell and a second spring, wherein the arc-shaped outer plate is fixedly mounted on the telescopic inner plate and the top ladder through the fixing plate, the arc-shaped outer plate is of an annular structure with notches, and first grid notches which are uniformly distributed are formed in the arc surface of the arc-shaped outer plate; the arc inner plate is slidably arranged on the arc outer plate, and a first spring is arranged between the arc inner plate and the arc outer plate; a first mounting sliding shell is mounted on one side of the arc-shaped inner plate, a first positioning block is slidably mounted in the first mounting sliding shell, and a second spring is mounted between the first positioning block and the first mounting sliding shell; the fourth guide wheel and the fifth guide wheel are rotatably arranged on the outer arc surface of the arc-shaped outer plate, a third pull rope is fixedly arranged on the first positioning block, and the other end of the third pull rope is positioned on the lower sides of the arc-shaped outer plate and the arc-shaped inner plate through the guide of the fourth guide wheel and the fifth guide wheel; the first locating block is matched with a first grating notch on the arc-shaped outer plate.

2. The maintenance hanging ladder for power construction as claimed in claim 1, wherein: two first sliding grooves are fixedly arranged on two sides of the bottom ladder, and the top ladder is slidably arranged on the bottom ladder through the two first sliding grooves; two symmetrical mounting lugs are fixedly mounted at the two sides of the lower end of the top ladder, and one end of the first pull rope is fixedly mounted on the mounting lug at the corresponding side.

3. The maintenance hanging ladder for power construction as claimed in claim 1, wherein: the limiting mechanism comprises a second guide wheel, a second pull rope, a connecting sleeve, a volute spiral spring, a first rotating shaft, a limiting fixture block and a limiting block, wherein the first rotating shaft is rotatably arranged on the top ladder, and the volute spiral spring is arranged between the first rotating shaft and the bottom ladder; the upper side of one end of the limiting block is provided with an inclined plane, the limiting block is arranged on the first rotating shaft in a swinging mode, and a limiting clamping block is arranged between the upper side of the limiting block and the top ladder; the connecting sleeve is rotatably installed at one end of the limiting block, the two second guide wheels are rotatably installed on the step surface of the bottom ladder, one end of the second pull rope is fixedly installed on the connecting sleeve, and the other end of the second pull rope penetrates out of the lower end of the top ladder through the two second guide wheels.

4. The maintenance hanging ladder for power construction as claimed in claim 1, wherein: and the upper end of the top ladder is provided with an anti-falling plate for preventing the sixth pull rope from falling off from the two first winding wheels.

5. The maintenance hanging ladder for power construction as claimed in claim 1, wherein: the third pull rope which finally penetrates out of the two hook mechanisms arranged on the telescopic inner plate is positioned at the lower end of the bottom ladder through the guide of a plurality of third guide wheels arranged on the telescopic inner plate and the telescopic outer plate;

and the third guide wheels are respectively provided with a U-shaped anti-falling plate for preventing the third pull rope from falling off from the third guide wheels.

6. The maintenance hanging ladder for power construction as claimed in claim 1, wherein: the arc outer plate is provided with a second sliding groove, and the arc inner plate is slidably arranged on the arc outer plate through the second sliding groove; for the two hook mechanisms arranged on the top ladder, guide arc strips which play a role of guiding a third pull rope passing through a fifth guide wheel are fixedly arranged on the arc inner plates of the two hook mechanisms; for the two hook mechanisms arranged on the telescopic inner plate, guide arc strips which play a role of guiding a third pull rope passing through a fifth guide wheel are fixedly arranged on the arc inner plate; and a guide shell which plays a role of guiding the third pull rope passing through the fourth guide wheel is fixedly arranged on the fixed plate.

7. The maintenance hanging ladder for power construction as claimed in claim 1, wherein: two third chutes are fixedly arranged on two sides of the telescopic outer plate, and the telescopic inner plate is slidably arranged on the telescopic outer plate through the two third chutes.

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