An automatic lifting device for power grid aerial work

Abstract

The present application relates to the technical field of power grid facility maintenance and repair equipment, and discloses an automatic lifting device for power grid aerial work, which comprises a shell and a seat installed outside the shell, a driver, a hoist and a self-locking structure are arranged in the shell, the shell is vertically penetrated by a lifting rope, the lifting rope in the shell is wound on the hoist, the hoist is driven by the driver and drives the shell to move along the lifting rope, the self-locking structure comprises two sets of self-locking guide mechanisms symmetrically arranged on both sides of the lifting rope, the guide wheels of each set of self-locking guide mechanism are eccentrically and rotatably attached to the side of the lifting rope through an axle, the wide end of the guide wheel is arranged close to the lifting rope, one end of the spring of the self-locking guide mechanism is connected with the inner wall of the shell, the other end is obliquely arranged towards the direction close to the lifting rope and connected with the side of the guide wheel. The present application solves the problem of inconvenience of power grid aerial work, and can use the driver to drive the hoist to carry the shell to ascend or descend, and can also realize automatic locking when the device rapidly descends.

Description

Technical Field

[0001] This invention relates to the field of power grid facility maintenance and repair equipment technology, specifically to an automatic lifting device for high-altitude operations in power grids. Background Technology

[0002] The power transmission network is a core component of the modern power system, undertaking the core functions of long-distance power transmission, regional power allocation, and power supply to end users. It is a critical infrastructure for ensuring a stable power supply for industrial and agricultural production, residential use, and society. Transmission lines and their supporting towers are widely distributed in various outdoor environments, covering complex geographical areas and spanning large distances, requiring continuous operation over long periods. The overall operating environment of power grid facilities is complex and the working conditions are harsh, constantly affected by complex meteorological conditions such as strong winds, rainfall, icing, high temperatures, and low temperatures. To promptly eliminate potential hazards in line equipment and avoid the risk of power grid outages due to faults, regular high-altitude maintenance operations are required for transmission lines, tower hardware, and other equipment. Safe and efficient high-altitude operation equipment is a fundamental condition for ensuring the smooth conduct of various high-altitude maintenance operations for the power grid.

[0003] Currently, in high-altitude maintenance and cable replacement operations on ultra-high voltage (UHV) transmission lines in China, manual climbing remains the dominant method. Workers must use foot spikes to climb to the work position on the tower crossarm, relying entirely on manpower for the entire process, from climbing and positioning to working and returning. High-altitude climbing is unstable and difficult, demanding high levels of physical fitness and experience from workers, and causing significant physical exhaustion, severely impacting the accuracy and efficiency of subsequent core operations such as maintenance and line replacement. Furthermore, manual high-altitude climbing poses significant safety hazards, easily leading to falls and operational errors due to fatigue or environmental interference. The traditional manual high-altitude work model suffers from low efficiency, poor safety, and high labor costs, making it unsuitable for the large-scale, high-frequency, and standardized high-altitude work requirements of current UHV power grids.

[0004] Therefore, there is an urgent need for an automatic lifting device for high-altitude operations in power grids to solve the problem that existing high-altitude operations in power grids require manual climbing, which makes the work inconvenient. Summary of the Invention

[0005] This invention addresses the shortcomings of existing technologies by providing an automatic lifting device for high-altitude operations in power grids, thereby solving the problem that existing high-altitude operations in power grids require manual climbing, which is inconvenient.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic lifting device for high-altitude power grid operations includes a housing and a seat mounted outside the housing. Inside the housing are a driver, a winch, and at least one set of self-locking structures. The housing allows a hoisting rope to pass through vertically. The hoisting rope inside the housing is wound around the winch, which is driven by the driver and moves the housing along the hoisting rope. Each set of self-locking structures includes two sets of self-locking guide mechanisms symmetrically arranged on both sides of the hoisting rope. The guide wheel of each self-locking guide mechanism is eccentrically and rotatably fitted against the side of the hoisting rope via a wheel axle. The wide end of the guide wheel is close to the hoisting rope. One end of the spring of the self-locking guide mechanism is connected to the inner wall of the housing, and the other end is inclined towards the hoisting rope and connected to the side of the guide wheel. The spring is used to constrain the widest end of the guide wheel to rotate upward and towards the hoisting rope.

[0008] To optimize the above technical solution, the specific measures also include: Furthermore, the self-locking guide mechanism also includes a fixing block, a connecting rod, and a connecting rod pin. One end of the spring is connected to the inner wall of the housing through the fixing block, and the other end is inclined towards the direction of the suspension rope and connected to one end of the connecting rod. The other end of the connecting rod is hinged to the side of the guide wheel through the connecting rod pin. A guide groove is provided on the guide wheel along the direction of movement of the suspension rope, and several spaced teeth are provided at the widest end of the guide wheel.

[0009] Furthermore, the self-locking structure is provided in two sets, which are respectively arranged above and below the winch. The two sets of upper self-locking guide mechanisms of the upper self-locking structure are symmetrically arranged on both sides of the upper hoisting rope of the winch, and the two sets of lower self-locking guide mechanisms of the lower self-locking structure are symmetrically arranged on both sides of the lower hoisting rope of the winch.

[0010] Furthermore, two sets of self-locking guide mechanisms are symmetrically arranged on both sides of the hoisting rope above the winch. A brake assembly is also provided above the self-locking guide mechanism. The brake assembly includes two swing blocks and brake pads. Two rotating rods located on both sides of the hoisting rope are symmetrically provided on the inner top of the housing. One end of each swing block is rotatably mounted on the rotating rod, and the swing blocks can move around the rotating rod to move the other end closer to or away from the hoisting rope. The middle section of each swing block is provided with a brake pad for clamping the hoisting rope on the side closer to the hoisting rope. The other end of each swing block is connected to a return spring for driving the two swing blocks to move away from each other. The two swing blocks are also connected to the upper end of the guide wheel through a friction assembly pull wire.

[0011] Furthermore, both brake pads have vertical wavy grooves on the side near the suspension rope, and the grooves on both brake pads can fit together.

[0012] Furthermore, it also includes an automatic brake and a brake assembly. The brake motor of the automatic brake is mounted inside the housing via a second motor mounting bracket, and the brake motor has a telescopic motor shaft. The brake assembly includes two swing blocks and brake pads. Two rotating rods located on both sides of the suspension rope are symmetrically arranged inside the housing. One end of each swing block is rotatably mounted on the rotating rod, and the swing blocks can move around the rotating rod to move the other end closer to or away from the suspension rope. The middle section of each swing block is provided with a brake pad for clamping the suspension rope on the side closer to the suspension rope. The other end of each swing block is connected to a return spring for driving the two swing blocks to move away from each other. The other end of each swing block is also connected to the motor cable of the telescopic motor shaft via a friction assembly cable.

[0013] Furthermore, it also includes a manual brake and a brake assembly. The manual brake includes a handle and a handle base. The U-shaped handle base is mounted on the outside of the housing. One end of the handle has a U-shaped connector. The handle is hinged to the handle base via the U-shaped connector and a handle pin. A ratchet extending into the U-shaped connector is fixed in the middle of the handle base. A locking rod is slidably mounted inside the handle. One end of the locking rod extends from the end away from the handle base, and the other end extends to the side of the ratchet and is connected to a pawl. A spring is connected between the pawl and the handle to drive the pawl to maintain engagement with the ratchet. The brake assembly includes two sway blocks and brake pads. Two brake pads are symmetrically arranged inside the housing. The rotating rods on both sides of the hoisting rope have two swing blocks, one end of which is rotatably mounted on the rotating rod. The swing blocks can move around the rotating rod to move the other end closer to or away from the hoisting rope. The middle section of the two swing blocks is provided with brake pads for clamping the hoisting rope on the side closer to the hoisting rope. The other end of the two swing blocks is connected to a return spring for driving the two swing blocks to move away from each other. The two swing blocks are also connected to the handle pull cable through the friction assembly pull cable. The side wall of the housing is provided with a corresponding through hole. After the handle pull cable passes through the through hole and exits the housing, it is connected to two base pull cables. The two base pull cables are respectively connected to the two ends of the U-shaped connector and are offset from the handle pin.

[0014] Furthermore, the driver includes a drive motor, a worm, and a worm wheel. The drive motor is mounted inside the housing via a first motor mounting base. The drive motor shaft is connected to one end of the worm via a coupling. The other end of the worm is rotatably mounted inside the housing via a fixed base. A worm wheel is connected to the drive shaft of the winch. The worm wheel and the worm are meshed through their teeth to form a worm gear transmission mechanism.

[0015] Furthermore, the winch also includes a friction wheel, which has a groove around its circumference for the hoisting rope to be wound around, and several anti-slip teeth are spaced apart in the groove for squeezing contact with the hoisting rope.

[0016] Furthermore, the seat has a backrest on the rear side, a vertical column connected to the front side of the seat, a connecting plate for mounting the housing on the top of the column, and a footrest that is tilted forward and downward on the lower part of the front side of the seat.

[0017] The beneficial effects of this invention are: This invention provides a seat for workers to sit on by installing a seat outside the housing; the drive and winch inside the housing allow the drive to power the winch, moving the housing along the hoisting rope; two sets of self-locking guide mechanisms symmetrically positioned on both sides of the hoisting rope provide a rotational tendency to the guide wheels on both sides when the housing is slowly rising and falling relative to the hoisting rope, and quickly reset under the constraint of springs, thus avoiding interference with the relative movement of the hoisting rope and the housing; and when the housing falls rapidly relative to the hoisting rope, the instantaneous... When the impact force exceeds the initial spring force, the spring cannot effectively reset. Under the action of friction, the widest end of the guide wheel is driven upward and rotates rapidly towards the direction of the rope until the guide wheels on both sides clamp and limit the rope. After the housing moves upward again, the guide wheels on both sides can be driven to move in the opposite direction to release the clamping limit. At the same time, the widest end of the guide wheel in the unlocked state is set towards the winch, which can squeeze and limit the rope wound on the winch, thereby ensuring that the rope is in close contact with the winch to provide effective winching force.

[0018] This invention solves the problem that existing high-altitude power grid operations require manual climbing, which is inconvenient. It can use a driver to drive a winch to raise or lower the housing. When the device falls rapidly, it can automatically lock and stop, ensuring the safety of personnel working at heights in the power grid.

[0019] This application employs a worm gear mechanism as the key drive component. While ensuring stable operation of the lifting device, the worm gear mechanism also possesses excellent self-locking properties, ensuring that slippage does not occur during lifting. Furthermore, in the event of sudden slippage, the first and second gears of the upper and lower self-locking guide mechanisms automatically lock the hoisting rope to prevent rapid descent. When the descent is suppressed, the upper and lower self-locking guide mechanisms release the hoisting rope under spring force, restoring free movement of the device. In addition, this application includes both an automatic brake and a manual brake to ensure that the device can be stopped as needed during high-altitude operations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 2 This is a schematic diagram of the internal structure of the housing of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 3 This is a schematic diagram illustrating the self-locking structure of an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 4 This is a schematic diagram of the self-locking structure above an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 5 This is a schematic diagram of the upper self-locking guide mechanism of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 6 This is a schematic diagram of the self-locking structure below an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 7 This is a schematic diagram of the lower self-locking guide mechanism of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 8 This is a schematic diagram of the moving state of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 9 This is a schematic diagram of the locked state of an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 10 This is a schematic diagram of the brake assembly of an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 11 This is a schematic diagram of the brake pad structure of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 12 This is a schematic diagram of the automatic brake of an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 13 This is a schematic diagram of the manual brake of an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 14 This is a schematic diagram of the internal structure of the manual brake of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 15 This is a schematic diagram of the drive unit of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 16 This is a schematic diagram of the connection of the driver of an automatic lifting device for high-altitude power grid operations proposed in this invention; Figure 17 This is a schematic diagram of the friction wheel of an automatic lifting device for high-altitude power grid operations proposed in this invention. Figure 18 This is a structural schematic diagram of a seat for an automatic lifting device for high-altitude power grid operations proposed in this invention.

[0021] Reference numerals: 1. Suspension rope; 2. Housing; 3. Seat; 31. Connecting plate; 32. Column; 33. Backrest chair; 34. Pedal; 4. Driver; 41. First motor mounting base; 42. Drive motor; 43. Coupling; 44. Worm gear; 45. Fixed seat; 46. Worm wheel; 5. Winch; 51. Friction wheel; 511. Groove; 512. Anti-slip tooth; 52. Upper self-locking guide mechanism; 521. Upper fixing block; 522. Upper spring; 523. Upper connecting rod; 524. Upper connecting rod pin; 525. Upper guide wheel; 5251. First meshing tooth; 5252. First guide groove; 526. Upper axle; 53. Lower self-locking guide mechanism; 531. Lower fixing block. 532. Lower end spring; 533. Lower end connecting rod; 534. Lower end connecting rod pin; 535. Lower end guide wheel; 5351. Second meshing tooth; 5352. Second guide groove; 536. Lower end wheel axle; 54. Drive shaft; 55. Key; 6. Automatic brake; 61. Second motor mounting base; 62. Brake motor; 63. Motor cable; 7. Manual brake; 71. Handle; 711. Pawl; 712. Locking rod; 72. Handle base; 721. Ratchet; 73. Handle pin; 74. Base cable; 75. Cable retainer; 76. Handle cable; 8. Brake assembly; 81. Swing block; 82. Brake pad; 821. Groove; 83. Return spring; 84. Friction assembly cable. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0023] As attached Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 As shown, an automatic lifting device for high-altitude power grid operations according to an embodiment of the present invention includes a housing 2 and a seat 3 installed outside the housing 2. Inside the housing 2, there is a driver 4, a winch 5, and at least one set of self-locking structures arranged along the suspension rope 1. The housing 2 allows the suspension rope 1 to pass through vertically. The suspension rope 1 located inside the housing 2 is wound around the winch 5. The winch 5 is driven by the driver 4 and drives the housing 2 to move along the suspension rope 1. Each set of self-locking structures includes two sets of self-locking guide mechanisms symmetrically arranged on both sides of the suspension rope 1. The guide wheel of each set of self-locking guide mechanisms is eccentrically and rotatably fitted to the side of the suspension rope 1 through a wheel axle inside the housing 2. The guide wheel is located close to the suspension rope 1 at the wide end of the wheel axle. One end of the spring of the self-locking guide mechanism is connected to the inner wall of the housing 2, and the other end is inclined towards the direction close to the suspension rope 1 and connected to the side of the guide wheel. The spring is used to constrain the widest end of the guide wheel to rotate upward and towards the direction close to the suspension rope 1.

[0024] This invention provides a seat 3 installed outside the housing 2 for workers to sit on. The drive 4 and winch 5 inside the housing 2 drive the winch 5, causing the housing 2 to move along the suspension rope 1. Two sets of self-locking guide mechanisms symmetrically arranged on both sides of the suspension rope 1 provide a rotational tendency to the guide wheels on both sides when the housing 2 is slowly rising and falling relative to the suspension rope 1, and quickly reset under the constraint of the spring, thus avoiding interference with the relative movement of the suspension rope 1 and the housing 2. When the housing 2 falls rapidly relative to the suspension rope 1, the instantaneous impact force generated by the fall is greater than the initial spring force, and the spring cannot effectively reset. Under the action of friction, the suspension rope 1 drives the widest end of the guide wheel upward and rapidly rotates towards the suspension rope 1 until the guide wheels on both sides clamp and limit the suspension rope 1. After the housing 2 moves upward again, the guide wheels on both sides can be driven to move in the opposite direction to release the clamping limit.

[0025] In the above scheme, the widest end of the guide wheel in the unlocked state is set towards the winch 5, which is used to squeeze and limit the rope 1 wound on the winch 5, thereby ensuring that the rope 1 is in close contact with the winch 5 to provide effective winching force.

[0026] This invention solves the problem that existing high-altitude power grid operations require manual climbing, which is inconvenient. It can use the driver 4 to drive the winch 5 to raise or lower the housing 2. When the device falls rapidly, it can also automatically lock and stop, ensuring the safety of personnel working at heights in the power grid.

[0027] As attached Figure 5 As shown, in a specific embodiment one based on the above embodiments: The self-locking guide mechanism also includes a fixed block, a connecting rod, and a connecting rod pin. One end of the spring is connected to the inner wall of the housing 2 through the fixed block, and the other end is inclined towards the direction of the suspension rope 1 and connected to one end of the connecting rod. The other end of the connecting rod is hinged to the wide end side of the guide wheel at the distance from the wheel axle through the connecting rod pin. A guide groove is provided on the guide wheel along the moving direction of the suspension rope 1, and several spaced teeth are provided at the widest end of the guide wheel.

[0028] In the above scheme, the teeth at the widest end of the guide wheel in the unlocked state are set towards the winch 5 to squeeze and limit the suspension rope 1 wound on the winch 5, thereby ensuring that the suspension rope 1 is in close contact with the winch 5 to provide effective winching force; and when locking is required, the guide wheels on both sides can move towards the suspension rope 1 in sync with the teeth, and the teeth on both sides can increase the biting and locking of the suspension rope 1.

[0029] As attached Figure 6 and attached Figure 7 As shown, in a specific embodiment two based on the above embodiments: The self-locking structure is provided in two sets, which are respectively set above and below the winch 5. The two sets of upper self-locking guide mechanisms 52 of the upper self-locking structure are symmetrically arranged on both sides of the upper hoisting rope 1 of the winch 5, and the two sets of lower self-locking guide mechanisms 53 of the lower self-locking structure are symmetrically arranged on both sides of the lower hoisting rope 1 of the winch 5.

[0030] In the scheme of the above specific embodiment 1, the upper self-locking guide mechanism 52 specifically includes two sets of symmetrically arranged and sequentially connected upper fixing blocks 521, upper springs 522, upper connecting rods 523, upper connecting rod pins 524, upper guide wheels 525, and upper wheel axles 626; the lower self-locking guide mechanism 53 includes two sets of symmetrically arranged and sequentially connected lower fixing blocks 531, lower springs 532, lower connecting rods 533, lower connecting rod pins 534, lower guide wheels 535, and lower wheel axles 536. Both the upper guide wheel 525 and the lower guide wheel 535 are circular eccentric wheels. The surface of the upper guide wheel 525 is provided with three first teeth 5251 and a first guide groove 5252, and the surface of the lower guide wheel 535 is provided with three second teeth 5351 and a second guide groove 5352; the wire diameter and length of the upper spring 522 can be set to be smaller than the wire diameter and length of the lower spring 532 as needed.

[0031] When the device is in use, the upper self-locking guide mechanism 52 and the lower self-locking guide mechanism 53 can automatically select one of the self-locking structures to lock the suspension rope 1 according to the difference between the impact force of the device falling and the spring force, or they can lock the suspension rope 1 at the same time.

[0032] As attached Figure 10 As shown, in a specific embodiment three based on the above embodiments: Two sets of self-locking guide mechanisms are symmetrically arranged on both sides of the hoisting rope 1 above the winch 5. A brake assembly 8 is also provided above the self-locking guide mechanism. The brake assembly 8 includes two swing blocks 81 and brake pads 82. Two rotating rods located on both sides of the hoisting rope 1 are symmetrically arranged on the inner top of the housing 2. One end of the two swing blocks 81 is rotatably mounted on the rotating rod, and the swing blocks 81 can move around the rotating rod to move the other end closer to or away from the hoisting rope 1. The middle section of the two swing blocks 81 is provided with brake pads 82 for clamping the hoisting rope 1 on the side closer to the hoisting rope 1. The other end of the two swing blocks 81 is connected to a return spring 83 for driving the two swing blocks 81 to move away from each other. The two swing blocks 81 are also connected to the upper end of the guide wheel through the friction assembly pull wire 84.

[0033] In this embodiment, when the housing 2 falls rapidly relative to the suspension rope 1, the widest end of the guide wheel driven by the suspension rope 1 rotates rapidly upward and towards the suspension rope 1 until the guide wheels on both sides clamp and limit the suspension rope 1. At the same time, the original upper end of the guide wheel moves downward, thereby pulling the friction assembly cable 84 and driving the ends of the two swing blocks 81 to move closer to each other, thereby causing the brake pads 82 on both sides to assist in clamping the suspension rope 1. When moving upward normally, the winch 5 located at the bottom can preferentially pull the suspension rope 1 at the guide wheel to release the lock of the guide wheel, and can simultaneously trigger the brake pads 82 to release the lock.

[0034] In the above scheme, the friction assembly pull wire 84 can be connected to the upper end of the guide wheels on both sides at the same time.

[0035] As attached Figure 11 As shown, both brake pads 82 have vertical wavy grooves 821 on the side near the suspension rope 1, and the grooves 821 on both brake pads 82 can fit together. This increases the clamping effect on the suspension rope 1.

[0036] As attached Figure 12 As shown, in specific embodiment four based on the above embodiments: It also includes an automatic brake 6 and a brake assembly 8. The brake motor 62 of the automatic brake 6 is mounted inside the housing 2 via a second motor mounting base 61, and the brake motor 62 has a telescopic motor shaft. The brake assembly 8 includes two swing blocks 81 and brake pads 82. Two rotating rods located on both sides of the suspension rope 1 are symmetrically arranged at the bottom of the housing 2. One end of the two swing blocks 81 is rotatably mounted on the rotating rod, and the swing blocks 81 can move around the rotating rod to move the other end closer to or away from the suspension rope 1. The middle section of the two swing blocks 81 is provided with brake pads 82 for clamping the suspension rope 1 on the side closer to the suspension rope 1. The other end of the two swing blocks 81 is connected to a return spring 83 for driving the two swing blocks 81 to move away from each other. The two swing blocks 81 are also connected to the motor pull wire 63 of the telescopic motor shaft via a friction assembly pull wire 84.

[0037] In this embodiment, when the housing 2 rapidly descends relative to the suspension rope 1, the telescopic motor shaft of the brake motor 62 pulls the motor cable 63 and the friction assembly cable 84, driving the ends of the two swing blocks 81 to move closer together, thereby causing the brake pads 82 on both sides to assist in clamping the suspension rope 1. When moving upward normally, the telescopic motor shaft of the brake motor 62 moves in the opposite direction, and the two swing blocks 81 can be reset under the action of the return spring 83. In this embodiment, the brake motor 62 can be a linear motor, which drives the motor cable 63 to move through the telescopic motor shaft.

[0038] As attached Figure 13 and attached Figure 14As shown, in specific embodiment five based on the above embodiments: It also includes a manual brake 7 and a brake assembly 8. The manual brake 7 includes a handle 71 and a handle base 72. The U-shaped handle base 72 is installed on the outside of the housing 2. One end of the handle 71 is provided with a U-shaped connector. The handle 71 is hinged to the handle base 72 through the U-shaped connector and the handle pin 73. A ratchet 721 extending into the U-shaped connector is also fixed in the middle of the handle base 72. A locking rod 712 is slidably provided inside the handle 71. One end of the locking rod 712 extends from the end away from the handle base 72, and the other end extends to the side of the ratchet 721 and is connected to a pawl 711. A spring is connected between the pawl 711 and the handle 71 to drive the pawl 711 to maintain engagement with the ratchet 721. The brake assembly 8 includes two swing blocks 81 and a brake pad 82. The inner bottom of the housing 2 Two rotating rods are symmetrically arranged on both sides of the suspension rope 1. One end of each of the two swing blocks 81 is rotatably mounted on the rotating rod, and the swing blocks 81 can move around the rotating rod to move the other end closer to or away from the suspension rope 1. The middle section of each of the two swing blocks 81 is provided with a brake pad 82 for clamping the suspension rope 1 on the side closer to the suspension rope 1. The other end of each of the two swing blocks 81 is connected to a return spring 83 for driving the two swing blocks 81 to move away from each other. The two swing blocks 81 are also connected to the handle pull cable 76 through the friction assembly pull cable 84. The side wall of the housing 2 is provided with a corresponding through hole. After the handle pull cable 76 passes through the through hole and exits the housing 2, it is connected to two base pull cables 74. The two base pull cables 74 are respectively connected to the two ends of the U-shaped connector and are offset from the handle pin 73.

[0039] In this embodiment, the base cable 74 and the handle cable 76 can be manually rotated to drive the friction assembly cable 84 to move, thereby pulling the movable ends of the two swing blocks 81 closer to each other. This drives the brake pads 82 in the middle of the two swing blocks 81 to limit and clamp the suspension rope 1. At this time, the pawl 711 and ratchet 721 can be used to keep it locked. When it is necessary to release the lock, the locking rod 712 is driven to move, thereby releasing the lock of the pawl 711 and ratchet 721, and the handle 71 can be reset as needed.

[0040] In the above scheme, the locking lever 712 can be hinged to the end of the pawl 711 away from the ratchet 721. The pawl 711 is rotatably mounted at the U-shaped joint via a pivot. In use, by pressing the locking lever 712, the end of the pawl 711 away from the ratchet 721 is moved closer to the ratchet 721, while the other end moves away from the ratchet 721, thereby releasing the lock between the pawl 711 and the ratchet 721.

[0041] A pull cord retainer 75 can be installed at the perforation point as needed for fixing the two ends of the rope.

[0042] In the scheme combining specific embodiment four and specific example five, during use, the automatic brake 6 and the manual brake 7 can respectively control the corresponding brake assembly 8 to lock the hoisting rope 1, thereby stopping the lifting device.

[0043] As attached Figure 15 and attached Figure 16 As shown, in a specific embodiment six based on the above embodiments: The drive unit 4 includes a drive motor 42, a worm 44, and a worm wheel 46. The drive motor 42 is mounted inside the housing 2 via a first motor mounting base 41. The shaft of the drive motor 42 is connected to one end of the worm 44 via a coupling 43. The other end of the worm 44 is rotatably mounted inside the housing 2 via a fixed base 45 and a bearing. The worm wheel 46 is connected to the drive shaft 54 ​​of the winch 5 via a key 55. The worm wheel 46 and the worm 44 form a worm gear transmission mechanism through tooth meshing.

[0044] As attached Figure 17 As shown, the winch 5 further includes a friction wheel 51. The friction wheel 51 has a circumferentially arranged groove 511 for the hoisting rope 1 to be wound around. Several anti-slip teeth 512 are spaced apart within the groove 511, and these anti-slip teeth 512 are used to press against the hoisting rope 1. Therefore, in use, the worm gear 44 can be driven to rotate by the drive motor 42, which in turn drives the friction wheel 51 to rotate via the worm wheel 46 and the transmission shaft 54. This, in conjunction with the anti-slip teeth 512, increases the winch force between the groove 511 and the hoisting rope 1, thereby effectively performing lifting and lowering movements.

[0045] In the embodiment combining the above-mentioned upper self-locking guide mechanism 52 and lower self-locking guide mechanism 53, during use, the first guide groove 5252 of the two upper guide wheels 525 and the second guide groove 5352 of the two lower guide wheels 535 can be used in conjunction with the groove 511 of the friction wheel 51 to bind and press the suspension rope 1, so that the suspension rope 1 is tightened and wound in the groove 511 of the friction wheel 51.

[0046] As attached Figure 18 As shown, in specific embodiment seven based on the above embodiments: The seat 3 has a backrest 33 on its rear side and a vertical column 32 connected to the front side of the seat 3. The top of the column 32 has a connecting plate 31 for mounting the housing 2. The seat 3 also has a foot pedal 34 that is tilted forward and downward at the bottom of the front side. In this embodiment, the backrest 33, column 32 and foot pedal 34 can be disassembled and replaced as needed.

[0047] As attached Figure 8 and attached Figure 9 As shown, a specific embodiment of the present invention is as follows: When the lifting device carries the workers to the air, the upper guide wheel 525, friction wheel 51, and lower guide wheel 535 are initially clamped to the hoisting rope 1 by the force of the upper spring 522 and the lower spring 532, and friction is generated. Since the worm gear mechanism in the drive 4 has self-locking properties, the lifting device can be suspended in the air. Next, the drive motor 42 is started, causing it to drive the worm gear 44 and worm wheel 46 to rotate. Through the transmission shaft 54 ​​and key 55, torque is output and the friction wheel 51 is driven to rotate upward. At this time, with the cooperation of the upper guide wheel 525 and the lower guide wheel 535, an upward winding force is generated between the contact surface of the hoisting rope 1 and the friction wheel 51. At the same time, the upper self-locking guide mechanism 52 and the lower self-locking guide mechanism 53 are subjected to the downward friction force of the hoisting rope 1, causing the upper guide wheel 525 and the lower guide wheel 535 on the left side of the hoisting rope 1 to rotate clockwise and the upper guide wheel 525 and the lower guide wheel 535 on the right side to rotate counterclockwise. This drives the first gear 5251 and the second gear 5351 to rotate outward, ultimately driving the lifting device to continuously roll and climb along the hoisting rope 1.

[0048] When the lifting device needs to be stopped, the operator can select either the automatic brake 6 or the manual brake 7. The automatic brake 63 or the manual brake 76 will respectively drive the friction assembly cable 84, which in turn drives the swing block 81 to compress the brake pads 82. This causes the corresponding brake pads to move relative to each other and lock the hoisting rope 1, thus suspending the device. When the lifting device needs to move again, the operator releases the automatic brake 6's motor cable 63 or the manual brake 7's handle cable 76. The corresponding brake pads, under the force of the return spring, release the hoisting rope 1, allowing the lifting device to resume movement.

[0049] When the lifting device slips and falls, the instantaneous impact force generated by the fall is greater than the initial spring force of the upper spring 522 and the lower spring 532. This causes the upper guide wheel 525 and the lower guide wheel 535 on the left side of the suspension rope 1 to rotate counterclockwise, and the upper guide wheel 525 and the lower guide wheel 535 on the right side to rotate clockwise. This drives the first gear 5251 and the second gear 5351 to rotate inward, thereby squeezing the suspension rope 1 inward. Ultimately, the suspension rope 1 is locked by the combined squeezing force and friction of the two pairs of gears. At the same time, the upper guide wheels 525 on both sides of the suspension rope 1 rotate counterclockwise and drive the friction assembly pull wire 84 to move, further driving the brake pad 82 to press the suspension rope 1 tightly into the groove 821. This allows the brake assembly 8 and the upper self-locking guide mechanism 52 to lock the suspension rope 1 together, thereby improving the locking ability of the lifting device when it falls abnormally and preventing the device from falling rapidly. After the lifting device stops slipping, the impact force of the device disappears, and the first gear 5251 and the second gear 5351 can release the hoisting rope 1 under the dominant action of the upper spring 522 and the lower spring 532, so that the lifting device can move up or down again.

[0050] When the lifting device experiences only slight slippage, the wire diameter and length of the upper spring 522 in the upper self-locking guide mechanism 52 can be set smaller than those of the lower spring 532 in the lower self-locking guide mechanism 53. This means the spring force of the upper spring 522 is less than that of the lower spring 532. Consequently, the impact force generated when the device slips falls between the spring forces of the upper and lower springs. Therefore, the device only needs to activate the upper self-locking guide mechanism 52 to lock the lifting rope 1. At this time, the lower self-locking guide mechanism 53 continuously works with the friction wheel 51 to provide a winching force to the device, ensuring that the device can quickly resume normal operation after the slippage stops.

[0051] When the operator lowers the lifting device normally, the upper guide wheel 525 and lower guide wheel 535 on the left side of the hoisting rope 1 will rotate counterclockwise, and the upper guide wheel 525 and lower guide wheel 535 on the right side will rotate clockwise, which will also drive the first gear 5251 and the second gear 5351 to rotate inward. However, the impact force generated when the lifting device descends at a constant speed is extremely small and cannot overcome the spring force restraint of the upper spring 522 and the lower spring 532. Therefore, the first gear 5251 and the second gear 5351 will stop at a position far away from the hoisting rope and will not jam the hoisting rope 1, thus allowing the device to descend smoothly. At the same time, the rotation of the upper guide wheel 525 is insufficient to cause the upper friction component pull wire 84 to drive the upper brake component 8 to clamp the hoisting rope 1, thus allowing the device to descend smoothly.

[0052] It should be noted that the terms such as "upper", "lower", "left", "right", "front", and "back" used in the invention are only for clarity of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0053] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that those skilled in the art will understand that various changes, modifications, substitutions, refinements, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations should be considered within the scope of protection of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic lifting device for high-altitude operations in power grids, characterized in that: The device includes a housing (2) and a seat (3) installed outside the housing (2). Inside the housing (2) are a driver (4), a winch (5) and at least one set of self-locking structures. The housing (2) allows the hoisting rope (1) to pass through vertically. The hoisting rope (1) located inside the housing (2) is wound around the winch (5). The winch (5) is driven by the driver (4) and drives the housing (2) to move along the hoisting rope (1). Each set of self-locking structures includes two sets of self-locking guide mechanisms symmetrically arranged on both sides of the hoisting rope (1). The guide wheel of each set of self-locking guide mechanisms is eccentrically and rotatably attached to the side of the hoisting rope (1) through the wheel axle. The guide wheel is set close to the hoisting rope (1) at the wide end of the wheel axle. One end of the spring of the self-locking guide mechanism is connected to the inner wall of the housing (2), and the other end is inclined towards the hoisting rope (1) and connected to the side of the guide wheel. The spring is used to constrain the widest end of the guide wheel to rotate upward and towards the hoisting rope (1).

2. The automatic lifting device for high-altitude operations in power grids according to claim 1, characterized in that: The self-locking guide mechanism also includes a fixed block, a connecting rod and a connecting rod pin. One end of the spring is connected to the inner wall of the housing (2) through the fixed block, and the other end is inclined towards the direction of the hoisting rope (1) and connected to one end of the connecting rod. The other end of the connecting rod is hinged to the side of the guide wheel through the connecting rod pin. A guide groove is provided on the guide wheel along the moving direction of the hoisting rope (1), and several spaced teeth are provided at the widest end of the guide wheel.

3. The automatic lifting device for high-altitude power grid operations according to claim 1, characterized in that: The self-locking structure is provided in two sets. The two sets of self-locking structures are respectively set above and below the winch (5). The two sets of upper self-locking guide mechanisms (52) of the upper self-locking structure are symmetrically set on both sides of the upper hoisting rope (1) of the winch (5). The two sets of lower self-locking guide mechanisms (53) of the lower self-locking structure are symmetrically set on both sides of the lower hoisting rope (1) of the winch (5).

4. The automatic lifting device for high-altitude operations in power grids according to claim 1, characterized in that: Two sets of self-locking guide mechanisms are symmetrically arranged on both sides of the hoisting rope (1) above the winch (5). A brake assembly (8) is also provided above the self-locking guide mechanism. The brake assembly (8) includes two swing blocks (81) and brake pads (82). Two rotating rods located on both sides of the hoisting rope (1) are symmetrically provided on the inner top of the housing (2). One end of the two swing blocks (81) is rotatably mounted on the rotating rod, and the swing blocks (81) can move around the rotating rod to move the other end closer to or away from the hoisting rope (1). The middle section of the two swing blocks (81) is provided with brake pads (82) for clamping the hoisting rope (1) on the side closer to the hoisting rope (1). The other end of the two swing blocks (81) is connected to a return spring (83) for driving the two swing blocks (81) to move away from each other. The two swing blocks (81) are also connected to the upper end of the guide wheel through the friction assembly pull wire (84).

5. The automatic lifting device for high-altitude operations in power grids according to claim 4, characterized in that: Both brake pads (82) have vertical wavy grooves (821) on the side near the suspension rope (1), and the grooves (821) of the two brake pads (82) can fit together.

6. The automatic lifting device for high-altitude operations in power grids according to claim 1, characterized in that: It also includes an automatic brake (6) and a brake assembly (8). The brake motor (62) of the automatic brake (6) is installed inside the housing (2) via a second motor mounting base (61), and the brake motor (62) has a telescopic motor shaft. The brake assembly (8) includes two swing blocks (81) and brake pads (82). Two rotating rods located on both sides of the hoisting rope (1) are symmetrically arranged inside the housing (2). One end of the two swing blocks (81) is rotatably mounted on the rotating rod, and the swing blocks (81) can move around the rotating rod to move the other end closer to or away from the hoisting rope (1). The middle section of the two swing blocks (81) is provided with brake pads (82) for clamping the hoisting rope (1) on the side closer to the hoisting rope (1). The other end of the two swing blocks (81) is connected to a return spring (83) for driving the two swing blocks (81) to move away from each other. The two swing blocks (81) are also connected to the motor pull wire (63) of the telescopic motor shaft via a friction assembly pull wire (84).

7. The automatic lifting device for high-altitude operations in power grids according to claim 1, characterized in that: It also includes a manual brake (7) and a brake assembly (8). The manual brake (7) includes a handle (71) and a handle base (72). The U-shaped handle base (72) is installed on the outside of the housing (2). One end of the handle (71) is provided with a U-shaped connector. The handle (71) is hinged to the handle base (72) through the U-shaped connector and the handle pin (73). A ratchet (721) extending into the U-shaped connector is also fixed in the middle of the handle base (72). A locking rod (712) is slidably provided inside the handle (71). One end of the locking rod (712) extends from the end away from the handle base (72), and the other end extends to the side of the ratchet (721) and is connected to a pawl (711). A spring is connected between the pawl (711) and the handle (71) to drive the pawl (711) to keep engaged with the ratchet (721). The brake assembly (8) includes two swing blocks (81) and a brake pad (82). Two rotating rods are symmetrically arranged inside the housing (2) on both sides of the hoisting rope (1). One end of the two swing blocks (81) is rotatably mounted on the rotating rod, and the swing blocks (81) can move around the rotating rod to move the other end closer to or away from the hoisting rope (1). The middle section of the two swing blocks (81) is provided with a brake pad (82) for clamping the hoisting rope (1) on the side closer to the hoisting rope (1). The other end of the two swing blocks (81) is connected to a return spring (83) for driving the two swing blocks (81) to move away from each other. The two swing blocks (81) are also connected to the handle pull line (76) through the friction assembly pull line (84). The side wall of the housing (2) is provided with a through hole. After the handle pull line (76) passes through the through hole and exits the housing (2), it is connected to two base pull lines (74). The two base pull lines (74) are respectively connected to the two ends of the U-shaped connector and are offset from the handle pin (73).

8. The automatic lifting device for high-altitude operations in power grids according to claim 1, characterized in that: The driver (4) includes a drive motor (42), a worm (44) and a worm wheel (46). The drive motor (42) is installed inside the housing (2) via a first motor mounting base (41). The shaft of the drive motor (42) is connected to one end of the worm (44) via a coupling (43). The other end of the worm (44) is rotatably mounted inside the housing (2) via a fixed base (45). The worm wheel (46) is connected to the drive shaft (54) of the winch (5). The worm wheel (46) and the worm (44) form a worm gear transmission mechanism through tooth surface meshing.

9. The automatic lifting device for high-altitude operations in power grids according to claim 8, characterized in that: The winch (5) also includes a friction wheel (51), which has a groove (511) around which the hoisting rope (1) can be wound. Several anti-slip teeth (512) are provided in the groove (511) at intervals. The anti-slip teeth (512) are used to press against the hoisting rope (1).

10. An automatic lifting device for high-altitude power grid operations according to claim 1, characterized in that: The seat (3) has a backrest (33) on the back side, and a vertical column (32) is connected to the front side of the seat (3). The top of the column (32) is provided with a connecting plate (31) for mounting the housing (2). The seat (3) also has a pedal (34) that is tilted forward and downward at the bottom of the front side.

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