Double-rope lifting device

Abstract

The invention discloses a double-rope lifting device. The double-rope lifting device comprises a shell, a pair of lifting ropes, a lifting mechanism and a pair of self-locking mechanisms. One side of the shell is provided with a seat plate for a worker to stand or sit; the lifting ropes penetrate through the shell and are arranged at intervals, and the lifting ropes are suitable for being hung on a power transmission line and extend downwards; the lifting mechanism is installed in the shell and drives the whole device and a worker to ascend and descend along the lifting rope by pulling the lifting rope. The self-locking mechanism is installed in the shell and correspondingly matched with the lifting rope, and the self-locking mechanism is suitable for locking and braking the lifting rope when the descending speed is larger than a set threshold value. The lifting device has the beneficial effects that a worker can sit or use the lifting device conveniently through the seat plate, the lifting mechanism can drive the whole device to ascend and descend, and self-adaptive adjustment can be conducted on pressing of the lifting rope. And when abnormal conditions such as slipping occur, the self-locking mechanism can lock and brake the lifting rope at a relatively high descending speed, so that the use safety of the whole device is ensured.

Description

Technical Field

[0001] The application relates to the field of electric power construction technology, and in particular to a double-rope lifting device. Background Art

[0002] In the field of power construction, it is necessary to use lifting and climbing equipment when working on high-altitude power towers. Due to the limitations of the construction site, the use of existing building elevators is very inconvenient.

[0003] To this end, some people have designed a simple lifting device that relies on rope traction for lifting. It generally includes a motor, a turntable, a clamping piece and a rope. Specifically, the rope is wrapped around the turntable, the clamping piece clamps the rope, and the motor drives the turntable to rotate. The static friction between the rope and the turntable causes the turntable to roll along the rope, thereby driving the entire device to lift and lower. The forward / reverse rotation of the motor controls the rise or fall of the device.

[0004] According to its working characteristics, the lifting device needs to have the following features: safety, detachability, and crisis relief and escape functions. However, most of the existing lifting devices are simple devices, and have not formed mature products; and there are generally problems such as inconvenience in use and lack of safety assurance. Summary of the invention

[0005] One of the purposes of the present application is to provide a double-rope lifting device that can solve at least one of the defects in the above-mentioned background technology.

[0006] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a double-rope lifting device, including a shell, a pair of suspension ropes, a lifting mechanism and a pair of self-locking mechanisms; a seat plate for workers to stand or sit is provided on one side of the shell; the suspension ropes pass through the shell and are arranged at intervals, and the suspension ropes are suitable for being suspended on the power transmission line and extending downward; the lifting mechanism is installed in the shell, and the lifting mechanism drives the entire device and the workers to be lifted and lowered along the suspension ropes by pulling the suspension ropes; the self-locking mechanism is installed in the shell and corresponds to the suspension ropes, and the self-locking mechanism is suitable for locking and braking the suspension ropes when the descent speed is greater than a set threshold.

[0007] Preferably, the lifting mechanism includes a driving device, a transmission shaft and a clamping mechanism; the transmission shaft is horizontally rotatably installed in the shell, and traction wheels are installed at both ends of the transmission shaft; the clamping mechanism is suitable for cooperating with the side of the traction wheel to form a traction groove with adjustable spacing, and the suspension rope is suitable for passing through the traction groove; the transmission shaft is transmission-connected with the output end of the driving device through the middle part, so that the transmission shaft rotates under the drive of the driving device, and then the traction wheel drives the entire device to be lifted and lowered along the suspension rope by frictionally rolling along the suspension rope.

[0008] Preferably, the clamping mechanism is suitable for adjusting the spacing of the traction grooves according to the weight of the staff; and, after the abnormal descent speed triggers the self-locking mechanism, the clamping mechanism is suitable for reducing the spacing of the traction grooves, so that after the self-locking mechanism is released, the traction wheel has sufficient friction to drive the entire device to perform normal lifting and lowering again.

[0009] Preferably, the clamping mechanism includes a pair of pressing plates, a pair of driving rods and an adjusting assembly; the pressing plates are correspondingly installed at the bottom of the traction wheel in a vertical sliding manner, and the pressing plates cooperate with the lower part of the traction wheel through an arc groove arranged at the upper end to form the traction groove; the driving rod is vertically installed, the upper end of the driving rod is abutted against the lower end of the corresponding pressing plate, and the lower part of the driving rod cooperates with the adjusting assembly, so that the driving rod drives the pressing plate to approach or move away from the traction wheel under the drive of the adjusting assembly, thereby adjusting the spacing of the traction grooves.

[0010] Preferably, the upper end of the driving rod and the lower end of the pressing plate are elastically connected via a first spring.

[0011] Preferably, the clamping mechanism also includes a pair of positioning seats, which are fixedly mounted on the shell; the driving rod includes a spline section as an upper part and a threaded section as a lower part, and the driving rod is spline-connected with the corresponding positioning seat through the spline section; the adjusting assembly includes a worm shaft and a pair of worm wheels; the worm wheel is rotatably mounted on the shell, and a threaded hole is provided at the center of the worm wheel, and the worm wheel is threadedly matched with the corresponding threaded section of the driving rod through the threaded hole; the worm shaft is horizontally rotatably mounted on the shell, and the worm shaft is matched with the worm wheel, so that the worm wheel is driven to rotate by the rotation of the worm shaft, and then the driving rod is driven to move vertically through threaded matching.

[0012] Preferably, both ends of the worm shaft extend to the outside of the shell; the clamping mechanism also includes a pair of operating rods; the operating rods are respectively located at both ends of the worm shaft and are connected through one-way bearings, and the engagement directions of the two one-way bearings are opposite; and then the reciprocating swing of the two operating rods is used to drive the worm shaft to perform continuous one-way rotation in opposite directions.

[0013] Preferably, a first guide wheel is rotatably installed above the traction wheel in the shell, and the lifting rope is pressed and guided with the corresponding first guide wheel, so that the first guide wheel rotates through friction with the lifting rope during the lifting process; the self-locking mechanism includes a slider, a rotating wheel and a locking block; the slider is slidably installed on the shell, and the rotating wheel is coaxially installed with the first guide wheel; the locking block is located on one side of the lifting rope and is rotatably installed on the shell, and one end of the locking block is hinged to the slider; when the descending speed is less than a set threshold, the rotating wheel does not contact the slider; when the descending speed is greater than the set threshold, the rotating wheel cooperates with the slider under the action of centrifugal force and drives the slider to slide, and then the locking block will approach the lifting rope and engage under the drive of the slider.

[0014] Preferably, the self-locking mechanism also includes a sliding seat, which is fixedly mounted on the housing, and an arc-shaped sliding groove is arranged in the sliding seat, and the sliding groove is concentric with the rotating wheel; the sliding block is arc-shaped and is elastically slidably mounted on the sliding groove by a second spring, and a convex tooth is arranged on the side of the sliding block close to the rotating wheel; a tooth plate is rotatably mounted on the side of the rotating wheel by a torsion spring, and the tooth plate approaches the rotating wheel under the elastic force of the torsion spring so that the rotation trajectory of the tooth plate does not contact the convex tooth; when the descending speed is greater than a set threshold value, the tooth plate overcomes the elastic force of the torsion spring under the drive of centrifugal force and extends along the radial direction of the rotating wheel, and then resists the convex tooth to drive the sliding block to slide along the sliding groove.

[0015] Preferably, the locking block is rotatably connected to the rotating shaft provided on the shell through a rotating groove provided in the middle, and the extending length of the rotating groove is greater than the diameter of the rotating shaft; a plurality of second clamping blocks are arranged at intervals along the length direction on the side of the locking block close to the sling rope, and a plurality of first clamping blocks are arranged at intervals along the vertical direction on the shell located on the other side of the sling rope; when the locking block engages the sling rope, the first clamping blocks and the second clamping blocks are staggered in the vertical direction, so that the sling rope engaged by the first clamping blocks and the second clamping blocks is wavy.

[0016] Compared with the prior art, the beneficial effects of this application are: The seat plate is convenient for staff to sit or use, and the lifting mechanism can drive the entire device to move up and down, and can adaptively adjust the compression of the suspension rope. In the event of abnormal conditions such as slipping, the self-locking mechanism can lock and brake the suspension rope at a higher descending speed to ensure the safety of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the state of being suspended on the transmission line in the present invention.

[0018] Figure 2 It is a schematic diagram of the internal structure of the shell of the present invention.

[0019] Figure 3 It is a schematic diagram of the matching structure of the positioning assembly and the suspension rope in the present invention.

[0020] Figure 4 It is a schematic structural diagram of the lifting mechanism after the shell of the present invention is removed and the self mechanism cooperates with the suspension rope respectively.

[0021] Figure 5 It is a schematic diagram of the exploded state of the clamping mechanism in the present invention.

[0022] Figure 6 It is a schematic diagram of the structure of the driving rod in the present invention.

[0023] Figure 7 It is a schematic diagram of the structure of the worm gear in the present invention.

[0024] Figure 8 It is a schematic diagram of the local structure of the cooperation between the clamping mechanism and the traction wheel in the present invention.

[0025] Fig. 9 It is a structural schematic diagram of the self-locking mechanism in the present invention.

[0026] Fig.10 It is a schematic diagram of the coordination state of the self-locking mechanism during normal lifting of the present invention.

[0027] Fig.11 It is a schematic diagram of the cooperation state of the self-locking mechanism locking the lifting rope when abnormal lifting occurs in the present invention.

[0028] In the figure: housing 1, suspension rod 11, first clamping block 110, buckle plate 101, positioning assembly 12, support plate 121, first positioning wheel 122, second positioning wheel 123, seat plate 13, support frame 14, first guide wheel 15, second guide wheel 16, rotating shaft 17, suspension rope 200, transmission line 300, lifting mechanism 4, driving device 41, transmission shaft 42, traction wheel 421, clamping mechanism 43, connecting plate 401, top rod 402, mounting seat 403, pressing plate 431, first spring 432, positioning seat 433, driving rod 434, spline section 4341, screw section 4342, worm shaft 435, worm shaft section 4351, worm wheel 436, threaded hole 4360, joystick 437, handle 4371, self-locking mechanism 5, sliding seat 51, sliding groove 510, slider 52, convex tooth 521, connecting rod 522, rotating wheel 53, tooth plate 531, torsion spring 532, locking block 54, rotating groove 540, second clamping block 541, second spring 55, one-way bearing 600. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0033] One of the preferred embodiments of the present application is as follows: Figures 1 to 11As shown, a double-rope lifting device includes a housing 1, a pair of suspension ropes 200, a lifting mechanism 4 and a pair of self-locking mechanisms 5. A seat plate 13 is provided on one side of the housing 1, and the seat plate 13 can be used for the staff to stand or sit, so as to provide a comfortable and convenient working position for the staff. Both suspension ropes 200 pass through the housing 1 and are arranged at intervals. The lifting stability of the device can be ensured by using the two suspension ropes 200. When the staff is lifting, the suspension rope 200 can be hung on the power transmission line 300 through the hook at the upper end and extend downward. The lifting mechanism 4 is installed in the housing 1 and is pulled and cooperated with the two suspension ropes 200 respectively, so that the lifting mechanism 4 can pull the suspension ropes 200 to drive the entire device and the staff to perform lifting and lowering movements along the suspension ropes 200. The self-locking mechanism 5 is installed in the shell 1 and corresponds to the lifting rope 200; when the lifting mechanism 4 and the lifting rope 200 encounter abnormal conditions such as slipping, the entire device will descend rapidly along the lifting rope 200. When the self-locking mechanism 5 descends at a speed greater than a set threshold, the lifting rope 200 can be locked and braked to stop the descent of the device, thereby ensuring the personal safety of the staff.

[0034] It should be known that there are two ways to lift the entire device; the first way is that the lifting mechanism 4 reels and loosens the suspension rope 200; the second way is that the extension length of the suspension rope 200 remains unchanged, and the lifting mechanism 4 drives the entire device to move along the suspension rope 200. Since the installation height of the transmission line 300 is relatively high during power construction or maintenance, the length of the suspension rope 200 used for lifting needs to be equal to the installation height of the transmission line 300, which is generally several tens of meters. If the first way is adopted, the entire device may be relatively large in size and heavy in weight depending on the degree of reeling of the suspension rope 200, which does not meet the use requirements of power construction, so the second way mentioned above is adopted for the lifting of the device in this embodiment.

[0035] At the same time, for the suspension of the suspension rope 200, the suspension rope 200 can be carried by a drone and suspended on the transmission line. The specific suspension process is a well-known technology for those skilled in the art, so it will not be described in detail here. After the suspension rope 200 is suspended, the staff can pass the lower end of the suspension rope 200 through the shell 1 on the ground and cooperate with the lifting mechanism 4. After the installation of the suspension rope 200 is completed, the staff can sit or stand on the seat plate 13 and start the lifting mechanism 4 to drive the entire device and the staff to rise along the suspension rope 200 until the set height is reached to carry out power construction work.

[0036] It should also be known that the second lifting method mentioned above mainly relies on the friction between the lifting rope 200 and the lifting mechanism 4 to ensure a normal lifting process. According to the calculation formula of friction: f=μF N ; where f represents the friction force, μ represents the friction coefficient, and FN Indicates positive pressure. Whether the lifting mechanism 4 can be lifted normally depends on the positive pressure between the lifting rope 200 and the lifting mechanism 4, and the friction coefficient between the lifting rope 200 and the lifting mechanism 4. As the number of lifts increases, the surface of the lifting rope 200 becomes smooth due to continuous friction, which in turn reduces the friction coefficient between the lifting rope 200 and the lifting mechanism 4; at the same time, as the lifting rope 200 wears, its size will shrink, and the positive pressure between the lifting rope 200 and the lifting mechanism 4 will decrease. When the friction between the lifting rope 200 and the lifting mechanism 4 cannot maintain normal lifting, the entire device will quickly descend due to friction slippage.

[0037] The triggering condition of the self-locking mechanism 5 is that a relatively large descent speed is required; that is, the self-locking mechanism 5 will not be triggered during normal lifting and lowering, and will only be triggered when slipping occurs and causes an abnormal descent speed. The triggered self-locking mechanism 5 can lock the suspension rope 200 and brake until the entire device stops descending. Compared with the traditional simple lifting device, the lifting device of the present application can provide a stable working environment and lifting requirements for the staff, and can brake the device in time when an abnormal fault occurs to ensure the personal safety of the staff.

[0038] In this embodiment, Figure 1 As shown, a pair of suspension rods 11 are vertically fixed at both ends of one side of the housing 1, and a positioning assembly 12 is installed on the top of each suspension rod 11. The suspension rope 200 can pass through the positioning assembly 12 along the suspension rod 11 and be suspended on the power transmission line 300. The suspension rope 200 can be positioned and guided by the positioning assembly 12 to ensure the lifting stability of the entire device.

[0039] Specifically, Figure 3 As shown, the positioning assembly 12 includes a support plate 121, a first positioning wheel 122 and a second positioning wheel 123. The support plate 121 can be fixedly installed on the top of the suspension rod 11 by fasteners such as bolts, etc.; the first positioning wheel 122 and the second positioning wheel 123 are rotatably installed on both sides of the support plate 121. When the device and the suspension rope 200 are installed in coordination, the suspension rope 200 can pass through the gap between the first positioning wheel 122 and the second positioning wheel 123, so that during the lifting process of the entire device, the suspension rope 200 generates a squeezing force pointing to the center of the circle on the first positioning wheel 122 and the second positioning wheel 123 under the action of the tension force, and the squeezing force can form a friction force to drive the first positioning wheel 122 and the second positioning wheel 123 to roll relative to the suspension rope 200, thereby guiding the lifting of the entire device and reducing the lifting resistance by using rolling friction.

[0040] In this embodiment, there are many specific structures of the lifting mechanism 4, one of which is as follows: Figure 2 and Figure 4As shown, the lifting mechanism 4 includes a driving device 41, a transmission shaft 42 and a clamping mechanism 43. The transmission shaft 42 is horizontally rotatably installed in the housing 1, and the transmission shaft 42 is respectively installed with traction wheels 421 at both ends close to the two suspension ropes 200. The clamping mechanism 43 is movably installed in the housing 1, and the sides of the clamping mechanism 43 and the two traction wheels 421 are respectively matched to form a traction groove with adjustable spacing. When the device and the suspension rope 200 are matched and installed, the suspension rope 200 can pass through the traction groove, so that the suspension rope 200 passing through the traction groove can be squeezed toward the traction wheel 421 by the clamping mechanism 43 to generate sufficient friction. The driving device 41 is fixedly installed in the housing 1, and the transmission shaft 42 can be connected to the output end of the driving device 41 through the middle part, so that the transmission shaft 42 is driven by the driving device 41 to rotate, and then the traction wheel 421 drives the entire device to be lifted and lowered along the suspension rope 200 by rolling along the friction of the suspension rope 200.

[0041] It is understandable that the spacing of the traction grooves is adjustable, and the friction between the sling rope 200 passing through the traction grooves and the traction wheel 421 can be adjusted, and it is only necessary to ensure that the rolling friction between the sling rope 200 and the traction wheel 421 is greater than the gravity of the entire device and the staff (without considering other friction resistances). Specifically, when installing the sling rope 200 and the device, the spacing of the traction grooves can be set larger through the clamping mechanism 43 so that the sling rope 200 can pass through the traction grooves smoothly; then the spacing of the traction grooves can be reduced through the clamping mechanism 43 until the friction between the sling rope 200 and the traction wheel 421 meets the use requirements; the specific spacing adjustment can be determined by itself according to actual needs.

[0042] It can also be understood that the specific structure and working principle of the driving device 41 are well-known technologies for those skilled in the art. Common driving devices 41 include motors, rotary cylinders, and rotary hydraulic cylinders, etc. In this embodiment, motors are preferably used. The driving device 41 can be installed vertically, and the driving device 41 and the transmission shaft 42 can be meshed and driven by bevel gears. At the same time, a battery can be installed inside or outside the housing 1, and the battery can supply power to the driving device 41 through the electric energy stored by charging.

[0043] Specifically, Figure 2 and Figure 4As shown, support frames 14 are fixedly installed on both sides of the housing 1, and the transmission shaft 42 is rotatably installed on the two support frames 14. A first guide wheel 15 and a second guide wheel 16 are rotatably installed on each support frame 14; the first guide wheel 15 is located above the traction wheel 421 and close to the side of the suspension rod 11, and the second guide wheel 16 is located on the side of the traction wheel 421. When the device and the suspension rope 200 are installed, the suspension rope 200 can extend downward along the lower side of the first guide wheel 15, pass through the traction groove, and then extend along the upper side of the second guide wheel 16 on the side close to the suspension rod 11.

[0044] It should be known that in order to ensure the lifting stability of the device, the contact area between the traction wheel 421 and the suspension rope 200 is as large as possible, that is, the wrap angle formed by the suspension rope 200 and the traction wheel 421 is as large as possible. The wrap angle corresponding to the traction groove is generally 180° at most; in this embodiment, Figure 4 As shown, by cooperating with the first guide wheel 15 and the traction wheel 421, the extension direction of the sling rope 200 can be changed, and then the wrap angle between the sling rope 200 and the traction wheel 421 can be increased to 240° to 270°; the specific increase angle can be determined according to the relative installation position and size between the first guide wheel 15 and the traction wheel 421.

[0045] At the same time, after the lifting rope 200 passes through the traction groove, if the second guide wheel 16 is not provided, the lifting rope 200 will extend downward along the clamping mechanism 43. Therefore, during the lifting process, the lifting rope 200 will continue to rub against the clamping mechanism 43 at the end position of the traction groove, which will cause the friction of the lifting rope 200 to increase over time, affecting the safety of the device. The second guide wheel 16 can be provided to vertically straighten the lifting rope 200 after passing through the traction groove, so that the lifting rope 200 does not bend and contact with the clamping mechanism 43 at the end position of the traction groove, thereby effectively reducing the friction of the lifting rope 200 to improve the safety of the device.

[0046] As can be seen from the above content, in this embodiment, the clamping mechanism 43 can adjust the spacing of the traction grooves. The clamping mechanism 43 can have the following functions during the operation of the device.

[0047] Function 1: The clamping mechanism 43 can adjust the spacing of the traction grooves according to the weight of the staff, so as to ensure that the device can work at the minimum power state while driving the staff to lift. That is, the friction between the lifting rope 200 and the traction wheel 421 can be adjusted according to the weight of the staff. It is only necessary to ensure that the friction between the lifting rope 200 and the traction wheel 421 is within the safety margin range with the weight of the staff as a reference. There is no need to operate the lifting rope 200 and the traction wheel 421 at the maximum friction, which will lead to increased wear of the lifting rope 200 and increase the power consumption of the driving device 41.

[0048] Function 2: After the self-locking mechanism 5 is triggered due to abnormal descending speed, the spacing of the traction grooves can be reduced by the clamping mechanism 43, so that after the self-locking mechanism 5 is unlocked, the traction wheel 421 has sufficient friction to drive the entire device to lift normally again. As can be seen from the above content, due to the wear of the suspension rope 200, the surface of the suspension rope 200 is smooth and the size is reduced, resulting in slippage relative to the traction wheel 421; that is, the friction coefficient and extrusion force between the suspension rope 200 and the traction wheel 421 are reduced. After the self-locking mechanism 5 is triggered and the device is braked, the spacing of the traction grooves can be adjusted by the clamping mechanism 43, and the reduction in friction caused by the reduction in friction coefficient and extrusion force can be compensated by increasing the positive pressure between the suspension rope 200 and the traction wheel 421. After the compensation of friction is completed, the lock of the self-locking mechanism 5 can be unlocked, so that the lifting mechanism 4 can smoothly drive the entire device to lift again.

[0049] In this embodiment, there are many specific structures of the clamping mechanism 43, one of which is as follows: Figure 4 , Figure 5 and Figure 8 As shown, the clamping mechanism 43 includes a pair of pressing plates 431, a pair of driving rods 434 and an adjusting assembly. The two pressing plates 431 are respectively and vertically slidably installed below the traction wheel 421. The pressing plates 431 cooperate with the lower part of the traction wheel 421 through the arc grooves provided at the upper ends to form traction grooves. The two driving rods 434 are both installed vertically, and the upper ends of the driving rods 434 are abutted against the lower ends of the corresponding pressing plates 431. The lower parts of the driving rods 434 cooperate with the adjusting assembly, so that the driving rods 434 drive the pressing plates 431 to move closer to or away from the traction wheel 421 under the drive of the adjusting assembly, thereby adjusting the spacing of the traction grooves.

[0050] It should be known that the pressing plate 431 can not only be installed below the traction wheel 421 and adjust the spacing of the traction grooves by vertical movement; the pressing plate 431 can also be installed by horizontal sliding and adjust the spacing of the traction grooves by horizontal movement; and even the pressing plate 431 can be installed by tilting sliding and adjust the spacing of the traction grooves by tilting movement. For ease of understanding, in this embodiment, it is preferred to use the vertical movement of the pressing plate 431 to adjust the spacing of the traction grooves.

[0051] Specifically, Figure 4 , Figure 5 and Figure 8As shown, the clamping mechanism 43 further includes a pair of positioning seats 433, which are fixedly installed in the housing 1 and respectively located below the two pressing plates 431. The two pressing plates 431 are fixed by a connecting plate 401, and a pair of downwardly extending push rods 402 are symmetrically arranged at the lower end of the connecting plate 401. The push rods 402 can be slidably matched with the corresponding positioning seats 433, so that the two pressing plates 431 can be vertically slidably installed on the housing 1.

[0052] In this embodiment, Figure 5 and Figure 8 As shown, the upper end of the driving rod 434 and the lower end of the pressing plate 431 are elastically connected by the first spring 432. Specifically, the first spring 432 is arranged in the positioning seat 433, and the two ends of the first spring 432 are respectively against the top rod 402 and the driving rod 434. Therefore, the driving rod 434 can squeeze the first spring 432 by vertical movement, so that the elastic force generated by the deformation of the first spring 432 drives the top rod 402 and the two pressing plates 431 to move vertically until sufficient friction is formed between the suspension rope 200 and the traction wheel 421; at this time, the positive pressure of the suspension rope 200 on the traction wheel 421 can be regarded as the elastic force of the first spring 432. By setting the first spring 432, when the suspension rope 200 is reduced in size due to friction, the first spring 432 can compensate for the gap between the traction groove and the suspension rope 200 caused by the reduction in size of the suspension rope 200 by deformation and expansion, thereby ensuring that there is still sufficient friction between the suspension rope 200 and the traction wheel 421.

[0053] It should be known that during the normal lifting process, the first spring 432 is in a deformed and compressed state. In order to meet the elastic force requirements, the first spring 432 is preferably a rectangular spring; it is assumed that the compression amount of the first spring 432 is 1 cm. As the number of lifting times increases, the size of the suspension rope 200 will shrink due to wear. Assuming that the wear amount of the suspension rope 200 is 0.5 mm, the first spring 432 will extend to 0.5 mm to compensate for the wear amount of the suspension rope 200, so that the pressure plate 431 can still squeeze the suspension rope 200 close to the traction wheel 421. At this time, the friction between the suspension rope 200 and the traction wheel 421 is only reduced by one twentieth, which is still within the safety margin, and can ensure that the device can be lifted and lowered normally. Until the wear of the suspension rope 200 is large, causing the first spring 432 to reduce the pressure due to compensation and unable to meet the friction force requirements, the traction wheel 421 and the suspension rope 200 will slip to trigger the self-locking mechanism 5.

[0054] In this embodiment, there are multiple ways for the adjustment component to drive the driving rod 434 to move vertically, one of which is as follows: Figures 5 to 8As shown, the driving rod 434 includes a spline section 4341 as an upper part and a threaded section as a lower part. The driving rod 434 is spline-connected with the corresponding positioning seat 433 through the spline section 4341, thereby limiting the rotation of the driving rod 434. The adjusting assembly includes a worm shaft 435 and a pair of worm wheels 436; the worm wheels 436 are rotatably mounted on the mounting seat 403 fixed on the housing 1, and a threaded hole 4360 is provided at the center of the worm wheel 436. The worm wheel 436 can be threadedly matched with the corresponding threaded section of the driving rod 434 through the threaded hole 4360. The worm shaft 435 is horizontally rotatably mounted on the housing 1, and the worm shaft 435 is matched with the corresponding worm wheel 436 through the worm section 4351, so that the rotation of the worm shaft 435 drives the worm wheel 436 to rotate, and then the driving rod 434 is driven to move vertically through the threaded match.

[0055] It should be known that the adjustment component can be not only the worm gear 436, but also a bevel gear or other transmission structure, as long as it can be rotated through the transmission structure to utilize the threaded fit to drive the drive rod 434 to move vertically. In this embodiment, the matching structure of the worm gear 436 and the worm shaft 435 is preferably adopted, and the self-locking structure of the worm gear and worm can be used on the basis of the self-locking of the threaded fit to further ensure the extrusion stability of the drive rod 434 on the pressure plate 431.

[0056] In this embodiment, in order to facilitate the staff to drive the worm shaft 435, as shown in FIG. Figure 2 and Figure 5 As shown, both ends of the worm shaft 435 extend to the outside of the housing 1. The clamping mechanism 43 also includes a pair of operating rods 437; the operating rods 437 are respectively located at both ends of the worm shaft 435 and connected through a one-way bearing 600, and the two one-way bearings 600 have opposite engagement directions; and then the reciprocating swing of the two operating rods 437 drives the worm shaft 435 to perform continuous one-way rotation in opposite directions.

[0057] For ease of understanding, the two joysticks 437 can be defined as the first joystick and the second joystick respectively; when the first joystick rotates forward, the corresponding one-way bearing 600 can be engaged to drive the worm shaft 435 to rotate forward, and the one-way bearing 600 corresponding to the second joystick is in a free state, so that the second joystick remains stationary. After the first joystick rotates a certain angle, it rotates in the reverse direction to reset. During this process, the one-way bearing 600 corresponding to the first joystick is in a free state, so that the worm shaft 435 is in a stationary state. The first joystick performs multiple reciprocating swings, and the worm shaft 435 can be driven to rotate continuously in the forward direction. Similarly, the second joystick will only engage its corresponding one-way bearing 600 when it rotates in the reverse direction, and then the worm shaft 435 will rotate in the reverse direction with the second joystick. Therefore, the forward and reverse rotation of the worm shaft 435 can be controlled respectively by the two joysticks 437, and the operation processes of the two joysticks 437 do not interfere with each other.

[0058] Specifically, Figure 2 and Figure 5 As shown, a handle 4371 is rotatably mounted on the top of the joystick 437. When the joystick 437 needs to be swung, the handle 4371 can be rotated to be perpendicular to the joystick 437, and then the staff can hold the handle 4371 to drive the joystick 437 to swing around the axis of the worm shaft 435. After the worm shaft 435 is rotated, the joystick 437 can be reset to a vertical state and snapped with the buckle plate 101 provided on the outer side of the housing 1 to prevent the joystick 437 from being accidentally touched and rotated, and the handle 4371 is also rotated to be parallel to the joystick 437.

[0059] In this embodiment, there are many specific structures of the self-locking mechanism 5, one of which is as follows: Figure 4 , Figures 9 to 11 As shown, the self-locking mechanism 5 includes a slider 52, a rotating wheel 53 and a locking block 54. The slider 52 is slidably mounted on the housing 1, and the rotating wheel 53 is coaxially mounted with the first guide wheel 15; the locking block 54 is located on one side of the suspension rope 200 and is rotatably mounted on the housing 1, and one end of the locking block 54 is hinged to the slider 52.

[0060] When lifting, the first guide wheel 15 will rotate under the friction of the suspension rope 200, and the rotating wheel 53 will rotate synchronously with the first guide wheel 15. Taking the descent of the device as an example, when the descent speed is less than the set threshold, it can be considered that the device is performing normal lifting and lowering, and the rotating wheel 53 is not in contact with the slider 52. When the descent speed is greater than the set threshold, it can be considered that the device is in a slipping state between the suspension rope 200 and the traction wheel 421. At this time, the entire device is in a fast descent state, and the rotation speed of the first guide wheel 15 and the rotating wheel 53 will become very fast, and then the rotating wheel 53 can be matched with the slider 52 under the action of centrifugal force and drive the slider 52 to slide; the sliding of the slider 52 will drive the locking block 54 to rotate around the installation position in the direction close to the suspension rope 200, until the locking block 54 is engaged with the suspension rope 200 to achieve the locking brake of the suspension rope 200.

[0061] It should be known that the sliding of the slider 52 can be linear sliding or arc-shaped sliding. In order to ensure the stability of the contact between the rotating wheel 53 and the slider 52, the slider 52 is preferably arc-shaped sliding in this embodiment.

[0062] Specifically, Figures 9 to 11 As shown, the self-locking mechanism 5 also includes a sliding seat 51, which is fixedly mounted on the support frame 14 in the housing 1; an arc-shaped sliding groove 510 is arranged in the sliding seat 51, and the sliding groove 510 is arranged concentrically with the rotating wheel 53. The slider 52 is arc-shaped and elastically slidably mounted on the sliding groove 510 through the second spring 55; the end of the slider 52 extending to the outside of the sliding groove 510 is hinged to the lower end of the locking block 54 through the connecting rod 522. The locking block 54 is rotatably connected to the rotating shaft 17 arranged on the housing 1 through the rotating groove 540 arranged in the middle, and the extension length of the rotating groove 540 is greater than the diameter of the rotating shaft 17. Therefore, when the rotating wheel 53 drives the slider 52 to slide along the sliding groove 510 to compress the second spring 55, the slider 52 can pull the locking block 54 through the connecting rod 522 to rotate around the rotating groove 540 in the direction close to the hanging rope 200. During this process, the rotating shaft 17 and the rotating groove 540 also slide relative to each other to compensate for the change in the distance between the connecting rod 522 and the rotating shaft 17 caused by the movement of the slider 52.

[0063] In this embodiment, there are multiple matching structures between the rotating wheel 53 and the slider 52, one of which is as follows: Figures 9 to 11As shown, a protruding tooth 521 is provided on one side of the slider 52 close to the rotating wheel 53; a tooth plate 531 is rotatably mounted on the side of the rotating wheel 53 through a torsion spring 532, and the tooth plate 531 approaches the rotating wheel 53 under the elastic force of the torsion spring 532, so that the rotation track of the tooth plate 531 does not contact the protruding tooth 521. When the descending speed is greater than a set threshold, the tooth plate 531 overcomes the elastic force of the torsion spring 532 under the drive of centrifugal force and extends in the radial direction of the rotating wheel 53, and then contacts the protruding tooth 521 to drive the slider 52 to slide along the slide groove 510.

[0064] It can be understood that, assuming that the elastic force of the torsion spring 532 that needs to be overcome when the tooth plate 531 rotates around the installation position until the end track just contacts the convex tooth 521 is F, assuming that the friction resistance is ignored; then at this time, the centrifugal force on the tooth plate 531 is just balanced with the elastic force F, and then the linear speed of the tooth plate 531 can be calculated by the formula of centrifugal force, and the linear speed is the threshold required for the self-locking mechanism 5 to be triggered. When the linear speed of the tooth plate 531 is lower than the above threshold, the tooth plate 531 may extend along the radial direction of the rotating wheel 53, but the end track of the tooth plate 531 does not contact the convex tooth 521, such as shown by the dotted line in 10. Only when the linear speed of the tooth plate 531 is greater than the set threshold, the end track of the tooth plate 531 will interfere with the convex tooth 521, and then drive the slider 52 to slide along the slide groove 510 by pressing against the convex tooth 521.

[0065] In this embodiment, Fig.10 and Fig.11 As shown, after entering the housing 1, the rope 200 is guided by the first guide wheel 15, so that the rope 200 located above the first guide wheel 15 extends in a direction parallel to the suspension rod 11, and the rope 200 is close to one side of the suspension rod 11. A plurality of second clamping blocks 541 are arranged at intervals along the length direction on the side of the locking block 54 close to the rope 200, and a plurality of first clamping blocks 110 are arranged at intervals along the vertical direction on the side wall of the suspension rod 11 located on the other side of the rope 200. When the locking block 54 clamps the rope 200, the first clamping blocks 110 and the second clamping blocks 541 are staggered in the vertical direction, so that the rope 200 clamped by the first clamping blocks 110 and the second clamping blocks 541 is wavy, thereby effectively improving the braking effect of the self-locking mechanism 5 on the rope 200, so as to quickly stop the device.

[0066] For ease of understanding, the specific working process of the device may be described below.

[0067] 1. Use a drone or other methods to hang two suspension ropes 200 on the transmission line 300. Then, on the ground, the lower ends of the suspension ropes 200 pass through the self-locking mechanism 5 and the lifting mechanism 4 respectively, and the corresponding joystick 437 is operated to drive the pressing plate 531 to approach the traction wheel 421 to reduce the spacing of the traction grooves, until the spacing between the suspension rope 200 and the traction wheel 421 meets the friction force requirement, and then the operation of the joystick 437 is stopped and the joystick 437 is buckled to the corresponding buckle plate 101.

[0068] 2. After the installation of the suspension rope 200 and the device is completed, the staff can stand or sit on the seat plate 13, and start the driving device 41 after the staff stabilizes it, and then the rotation of the traction wheel 421 drives the entire device and the staff to move upward along the suspension rope 200 at a stable speed, and perform a corresponding downward movement at high altitude.

[0069] 3. If the rope 200 and the traction wheel 421 slip and cause the device and the staff to fall rapidly, the first guide wheel 15 drives the rotating wheel 53 to rotate until the rotation speed exceeds the set threshold through the friction with the rope 200, and then the tooth plate 531 on the rotating wheel 53 will extend radially relative to the rotating wheel 53 until the tooth plate 531 abuts against the protruding teeth 521 on the slider 52 to drive the slider 52 to slide along the slide groove 510 to compress the second spring 55. When sliding, the slider 52 will pull the locking block 54 to approach the rope 200 through the connecting rod 522 until the rope 200 is squeezed to the side wall of the suspension rod 11 through the second clamping block 541, and then cooperate with the first clamping block 110 on the suspension rod 11 to squeeze the rope 200 into a wave shape. After the tooth plate 531 abuts against the protruding tooth 521, as long as the first guide wheel 15 is still rotating, the locking block 54 will continue to squeeze the sling 200; until the friction between the first clamping block 110 and the second clamping block 541 and the sling 200 is able to support the entire device and the staff, the entire device will be braked, and at this time the locking block 54 and the sling 200 are in a force balance state.

[0070] Subsequently, the staff can drive the pressing plate 531 to further reduce the spacing of the traction grooves by operating the corresponding joystick 437 to compensate for the wear of the suspension rope 200, so that the friction between the suspension rope 200 and the traction wheel 421 can meet the lifting requirements again. After the adjustment of the traction groove is completed, the driving device 41 can be started to drive the entire device to rise first. During the rising process, the driving direction of the suspension rope 200 on the locking block 54 corresponds to the rotation direction of the gear 531 disengaging from the slider 52. After rising for a certain distance, the slider 52 drives the locking block 54 to reset under the elastic force of the second spring 55, and the tooth plate 531 is also reset to disengage from the convex tooth 521 under the elastic force of the torsion spring 532.

[0071] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A double rope lifting device, characterized in that: include A housing; a seat plate for a worker to stand or sit on is provided on one side of the housing; A pair of suspension ropes; the suspension ropes pass through the housing and are arranged at intervals, and the suspension ropes are suitable for being suspended on the power transmission line and extending downward; Lifting mechanism; The lifting mechanism is installed in the shell, and the lifting mechanism drives the entire device and the staff to move up and down along the lifting rope by pulling the lifting rope; as well as A pair of self-locking mechanisms; the self-locking mechanisms are installed in the housing and correspondingly cooperate with the suspension rope, and the self-locking mechanisms are suitable for locking and braking the suspension rope when the descending speed is greater than a set threshold.

2. The double rope lifting device according to claim 1, characterized in that: The lifting mechanism comprises: Transmission shaft; the transmission shaft is horizontally rotatably installed in the housing, and traction wheels are installed at both ends of the transmission shaft; A clamping mechanism; the clamping mechanism is adapted to cooperate with the side of the traction wheel to form a traction groove with adjustable spacing, and the sling rope is adapted to pass through the traction groove; and The driving device; the transmission shaft is connected to the output end of the driving device through the middle part, so that the transmission shaft rotates under the drive of the driving device, and then the traction wheel drives the entire device to rise and fall along the suspension rope by friction rolling along the suspension rope.

3. The double rope lifting device according to claim 2, characterized in that: The clamping mechanism is suitable for adjusting the spacing of the traction grooves according to the weight of the staff; Furthermore, after the abnormal descending speed triggers the self-locking mechanism, the spacing of the traction grooves is reduced by the clamping mechanism, so that after the self-locking mechanism is released, the traction wheel has sufficient friction to drive the entire device to perform normal lifting again.

4. The double rope lifting device according to claim 2, characterized in that: The clamping mechanism comprises: A pair of pressing plates; the pressing plates are correspondingly mounted vertically and slidably below the traction wheel, and the pressing plates cooperate with the lower part of the traction wheel through the arc grooves provided at the upper ends to form the traction grooves; A pair of driving rods; the driving rods are vertically installed, and the upper ends of the driving rods are abutted against the lower ends of the corresponding pressing plates; and Adjustment assembly; the lower part of the driving rod cooperates with the adjustment assembly, so that the driving rod drives the pressure plate to move closer to or away from the traction wheel under the drive of the adjustment assembly, thereby adjusting the spacing of the traction grooves.

5. The double rope lifting device according to claim 4, characterized in that: The upper end of the driving rod and the lower end of the pressing plate are elastically connected via a first spring.

6. The double rope lifting device according to claim 4, characterized in that: The clamping mechanism further includes a pair of positioning seats, and the positioning seats are fixedly mounted on the housing; The driving rod comprises a spline section as an upper portion and a threaded section as a lower portion, and the driving rod is spline-connected with the corresponding positioning seat through the spline section; The adjustment component comprises: a pair of worm wheels; the worm wheels are rotatably mounted on the housing, a threaded hole is provided at the center of the worm wheels, and the worm wheels are threadedly matched with the corresponding threaded segments of the drive rod through the threaded holes; and A worm shaft; the worm shaft is horizontally rotatably mounted on the housing, and the worm shaft cooperates with the worm wheel so that the worm wheel is driven to rotate by the rotation of the worm shaft, and then the drive rod is driven to move vertically through threaded cooperation.

7. The double rope lifting device according to claim 6, characterized in that: Both ends of the worm shaft extend to the outside of the shell; the clamping mechanism also includes a pair of operating rods; the operating rods are respectively located at both ends of the worm shaft and are connected through one-way bearings, and the engagement directions of the two one-way bearings are opposite; and then the reciprocating swing of the two operating rods is used to drive the worm shaft to perform continuous one-way rotation in opposite directions.

8. The double rope lifting device according to any one of claims 1 to 7, characterized in that: A first guide wheel is rotatably mounted above the traction wheel in the housing, and the sling rope is pressed and guided with the corresponding first guide wheel, so that the first guide wheel rotates through friction with the sling rope during the lifting process; The self-locking mechanism comprises: The slider is slidably mounted on the housing. The rotating wheel is coaxially mounted with the first guide wheel; and A locking block; the locking block is located on one side of the suspension rope and is rotatably mounted on the housing, and one end of the locking block is hinged to the slider; When the descending speed is less than a set threshold, the rotating wheel is out of contact with the slider; When the descending speed is greater than a set threshold, the rotating wheel will cooperate with the slider under the action of centrifugal force and drive the slider to slide, and then the locking block will approach the suspension rope and engage under the drive of the slider.

9. The double rope lifting device according to claim 8, characterized in that: The self-locking mechanism further comprises a sliding seat, the sliding seat is fixedly mounted on the housing, an arc-shaped sliding groove is arranged in the sliding seat, and the sliding groove is concentric with the rotating wheel; The slider is arc-shaped and is elastically slidably installed in the slide groove through a second spring, and a convex tooth is provided on a side of the slider close to the rotating wheel; A toothed plate is rotatably mounted on the side of the rotating wheel through a torsion spring, and the toothed plate is moved close to the rotating wheel under the elastic force of the torsion spring so that the rotation track of the toothed plate does not contact the convex teeth; When the descending speed is greater than a set threshold, the tooth plate overcomes the elastic force of the torsion spring under the drive of centrifugal force and extends in the radial direction of the rotating wheel, thereby abutting against the convex teeth to drive the slider to slide along the sliding groove.

10. The double rope lifting device according to claim 8, characterized in that: The locking block is rotatably connected to a rotating shaft provided on the housing through a rotating groove provided in the middle, and the extending length of the rotating groove is greater than the diameter of the rotating shaft; A plurality of second clamping blocks are arranged at intervals along the length direction on one side of the locking block close to the sling rope, and a plurality of first clamping blocks are arranged at intervals along the vertical direction on the housing located on the other side of the sling rope; When the locking block engages the sling rope, the first engaging block and the second engaging block are staggered in the vertical direction, so that the sling rope engaged by the first engaging block and the second engaging block is wavy.

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