A self-service aerial work lift

Abstract

The present invention discloses a self-service aerial work lift, comprising a frame, a rope winding shaft, a driving device and a rope arranger; the rope winding shaft is rotatably arranged on the frame, and a rope that can be retracted and released by winding is provided on the rope winding shaft; the driving device is used to drive the rope winding shaft to rotate; the rope arranger comprises a screw rod with a one-way thread groove and arranged parallel to the rope winding shaft, a slide table that can move axially but is fixedly arranged on the screw rod along the circumferential direction, a first transmission path composed of a single number of gears connected in sequence, a second transmission path composed of a plurality of gears connected in sequence, and a direction-changing driving mechanism; the direction-changing driving mechanism comprises a steering driving gear that can switch between the first transmission path and the second transmission path to drive one of them; the rope-arranging function is completed by using a screw rod with a one-way thread groove, and the manufacturing cost of the screw rod is low and the manufacturing is simple; the screw rod is directly threadedly connected to the slide table, the loss rate of the slide table or the screw rod is low, and the structural stability is high.

Description

Technical Field

[0001] The invention relates to the technical field of lifting devices, and in particular to a self-service aerial work lifter. Background Art

[0002] The existing lifting devices are generally lifted and lowered by rope traction, and the rope is wound on the rope shaft to retract and release the rope; in order to arrange the rope neatly on the rope winding shaft to avoid the rope being too messy and tangled, a rope arranger is used to arrange the rope during the winding process; referring to the Chinese patent with publication number CN204474221U and the Chinese patent with publication number CN204232132U, it can be seen that the current rope arrangers basically use a bidirectional screw to arrange the rope, and a slide for limiting the rope position is set on the bidirectional screw, so that the bidirectional screw and the rope winding shaft rotate synchronously, and when the rope winding shaft is in the rope winding, the slide on the bidirectional screw moves axially, so that the rope is neatly arranged when winding; and because the bidirectional screw has two relatively arranged thread grooves, when the slide moves to the end along one thread groove, it will jump to cooperate with the other thread groove, thereby moving in the opposite direction, thereby realizing the reciprocating stacking of the rope on the rope winding shaft.

[0003] However, the bidirectional screw has high precision requirements, and the manufacturing cost and difficulty are also high. In addition, a crescent-shaped component is required in the slide to achieve the jump from one thread groove to another. The structure of the crescent-shaped component can refer to the Chinese patent publication number CN108853766A. Since the crescent-shaped component needs to constantly move and jump in the thread groove, the loss rate is high and it is easy to be damaged, which makes the stability of the rope arranger not high enough. Summary of the invention

[0004] In view of this, the present invention proposes a self-service aerial work lifter, which can solve the problems of unstable rope arrangement function and high manufacturing difficulty of the existing lifting device.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A self-service aerial work lift, comprising:

[0007] Frame, rope winding shaft, driving device, rope guide;

[0008] The rope winding shaft is rotatably arranged on the frame, and the rope winding shaft is provided with a rope that is retracted and released by winding;

[0009] The driving device is used to drive the rope winding shaft to rotate;

[0010] The rope arrangement device comprises a screw having a unidirectional thread groove and arranged parallel to the rope winding shaft, a slide table which is axially movable but circumferentially fixed on the screw, a first transmission path composed of a single number of gears connected in sequence, a second transmission path composed of a plurality of gears connected in sequence, and a direction-changing drive mechanism;

[0011] The slide is threadedly connected to the screw, and the slide is driven to move axially by rotating the screw, and the rope passes through the slide; the gear at one end of the first transmission path is connected to the screw, and the gear at the other end is defined as a first steering gear; the gear at one end of the second transmission path is connected to the screw, and the gear at the other end is defined as a second steering gear; the direction-changing drive mechanism includes a steering drive gear that can switch between the first steering gear and the second steering gear to drive one of them; the steering drive gear rotates synchronously with the rope winding shaft;

[0012] The first transmission path and the second transmission path are independent of each other; or the first transmission path and the second transmission path partially overlap.

[0013] As a further optional solution of the self-service aerial work lift, the direction-changing drive mechanism includes:

[0014] A direction-changing planetary carrier, on which a plurality of steering drive gears are arranged, and the steering drive gears serve as planetary gears on the direction-changing planetary carrier;

[0015] A rope-arranging synchronous shaft rotates synchronously with the rope-winding shaft, and is provided with a synchronously rotating direction-changing sun gear, the direction-changing sun gear meshing with the steering drive gear;

[0016] The intermittent motion mechanism comprises a continuous driving member and an intermittent driven member, wherein the continuous driving member is connected to the rope arrangement synchronous shaft through a speed reduction mechanism; and the intermittent driven member is connected to the direction-changing planetary frame for synchronous rotation;

[0017] Among them, the angle between two adjacent steering drive gears and the central axis of the changing planetary carrier is a first angle, the angle between the first steering gear, the second steering gear and the central axis of the changing planetary carrier is a second angle, and the first angle is twice the second angle; the rope-arranging synchronization shaft has the same rotation speed as the screw.

[0018] As a further optional scheme for the self-service aerial work lift, the direction-changing planetary carrier and the intermittent follower can be rotatably connected to the rope-arranging synchronization shaft; the rope-arranging synchronization shaft is provided with a support rod arranged parallel to it, and the continuous prime mover can be rotatably arranged on the support rod; the reduction mechanism includes a reduction transmission path composed of a plurality of gears connected in sequence, the gears on the reduction transmission path are respectively connected to the rope-arranging synchronization shaft and the support rod, the gear at one end of the reduction transmission path is synchronously rotatably connected to the rope-arranging synchronization shaft, and the gear at the other end is synchronously rotatably connected to the continuous prime mover.

[0019] As a further optional scheme of the self-service aerial work lift, the rope winding shaft is axially hollow; the driving device is arranged inside the rope winding shaft; the driving device includes an axially hollow support cylinder, an external rotation driver with a self-locking function, a main shaft, a driving cylinder with an inner gear ring, and a driving planetary carrier; the external rotation driver includes an inner stator fixedly sleeved on the support cylinder and an outer rotor rotatably sleeved outside the inner stator; the outer rotor is fixedly connected to the driving cylinder for synchronous rotation; the driving planetary carrier has a plurality of planetary gears meshing with the inner gear ring of the driving cylinder, the main shaft is arranged in the support cylinder and the main shaft is provided with a driving sun gear meshing with the planetary gears on the driving planetary carrier; a driving plate is provided in the rope winding shaft, and the driving planetary carrier is transmission-connected with the driving plate; when the main shaft is fixed, the outer rotor drives the driving planetary carrier to rotate, and the driving planetary carrier drives the driving plate to rotate to realize the rotation of the rope winding shaft; the rope arranging synchronization shaft is coaxially arranged with the driving plate and fixedly connected in the circumferential direction.

[0020] As a further optional scheme for the self-service aerial work lift, the driving planetary carrier is connected to a multi-stage planetary reduction mechanism, and the planetary carrier of the last stage of the multi-stage planetary reduction mechanism is coaxially arranged and fixedly connected to the drive plate in the rope winding shaft; the external rotary drive and the multi-stage planetary reduction mechanism are provided with a protective tube, and the protective tube is fixedly connected to the frame, and the protective tube has an inner gear ring that cooperates with the multi-stage planetary reduction mechanism.

[0021] As a further optional solution of the self-service aerial work lift, a braking device is included, the braking device includes a first braking mechanism for braking the main shaft and a second braking mechanism for braking the rope winding shaft; a brake disc is provided on the main shaft;

[0022] The first brake mechanism comprises a first disc brake pad and a second disc brake pad respectively arranged on both sides of the brake disc, the second disc brake pad is driven by a spiral push rod to move closer to / away from the first disc brake pad; the spiral push rod is connected to a connecting rod mechanism; the spiral push rod is driven to rotate.

[0023] The second braking mechanism comprises two drum brake pads arranged in the rope winding shaft and an expansion and contraction member used to open the two drum brake pads to rub the rope winding shaft, and the opening of the two drum brake pads is achieved by rotating the expansion and contraction member.

[0024] As a further optional scheme of the self-service aerial work lift, the braking device also includes a linkage shaft, a first through hole is provided on the expansion and contraction piece, a second through hole is provided on a connecting rod of the connecting rod mechanism, and the linkage shaft is inserted into the first through hole and the second through hole; the inner wall of the first through hole is provided with a first slot, and the linkage shaft is provided with a first top block corresponding to the first slot, and the first slot is provided with a first virtual position for the first top block to move in a first direction in the circumferential direction; the inner wall of the second through hole is provided with a second slot, and the linkage shaft is provided with a second top block corresponding to the second slot, and the second slot is provided with a second virtual position for the second top block to move in a second direction in the circumferential direction, and the first direction and the second direction are opposite; when the When the linkage shaft is in the initial position, the first braking mechanism is in a braking state, and the second braking mechanism is in a relaxed state; when the linkage shaft rotates from the initial position to the first direction, the second top block causes the connecting rod mechanism to swing and rotate the spiral push rod to achieve the relaxation of the main shaft, and the first top block enters the first virtual position; when the linkage shaft rotates from the initial position to the second direction, the first top block causes the expansion and contraction part to rotate, and the two drum brake pads are opened to achieve the braking of the rope winding shaft, and the second top block enters the second virtual position; the two drum brake pads are tightened by the first resetting component, thereby achieving the relaxation of the rope winding shaft; the spiral push rod is reset by acting on the second resetting component of the connecting rod mechanism, thereby achieving the fixation of the main shaft.

[0025] As a further optional scheme for the self-service aerial work lift, the rotation of the linkage shaft is controlled by a control rocker arm, one end of the control rocker arm is provided with an adapter, and the adapter is fixedly connected to the linkage shaft; the control rocker arm has a cavity inside, and the adapter is connected to the inner wall of the control rocker arm through a clutch structure, and the stopping state of the clutch structure is achieved by a third reset member, thereby achieving a fixed connection between the adapter and the control rocker arm; the stopping state of the clutch structure is released by a trigger, thereby achieving a rotatable connection between the adapter and the control rocker arm.

[0026] As a further optional scheme for the self-service aerial work lift, the clutch mechanism includes a plurality of arc-shaped openings arranged on the inner wall of the cavity of the control rocker arm, and the arc-shaped openings include a relatively wide portion and a relatively narrow portion; a movable roller is correspondingly arranged in an arc-shaped opening; the adapter has a cylindrical portion embedded in the cavity of the control rocker arm, and a clutch driving member is rotatably arranged on the cylindrical portion, and the clutch driving member has a buckle groove for the roller to enter, and the buckle groove runs through the upper and lower parts; the clutch driving member is rotated to drive the roller to be located in the relatively wide portion or the relatively narrow portion.

[0027] As a further optional solution of the self-service aerial work lift, the trigger is a traction rope used to pull the clutch drive member to rotate.

[0028] As a further optional solution of the self-service aerial work lift, the control rocker arm is provided with a bendable hinged portion, and the hinged portion maintains the control rocker arm in a straight state through a fourth reset member.

[0029] As a further optional solution of the self-service aerial work lift, it also includes a rope tightener, which includes a driving shaft and a driven shaft, the driving shaft is provided with a driving pulley, the driven shaft is provided with a driven pulley, the driving pulley and the driven pulley are respectively located on both sides of the rope to clamp the rope; the driving shaft is connected to the motor transmission, the driving shaft or the driven shaft is connected with a buffer spring, and the buffer spring causes the driving pulley or the driven pulley to press against the rope.

[0030] As a further optional scheme for the self-service aerial work lift, the motor is connected to a safety output mechanism, which includes a friction fixing ring with an inner gear ring, a tightening rope planetary carrier, a tightening rope planetary wheel arranged on the tightening rope planetary carrier, and a tightening rope sun wheel connected to the motor; the tightening rope sun wheel, the tightening rope planetary wheel and the friction fixing ring form a planetary gear train structure; the tightening rope planetary carrier is transmission-connected to the driving shaft; an adjustable braking mechanism is provided outside the friction fixing ring to provide a specified braking force therefor, and the adjustable braking mechanism includes a friction plate for providing friction force to the outer surface of the friction fixing ring, and the friction force is adjusted by adjusting the pressure between the friction plate and the outer surface of the friction fixing ring.

[0031] As a further optional solution of the self-service aerial work lift, the frame is covered with a shell, and a safety strap for the wearer to carry is provided on the frame.

[0032] The beneficial effects of the present invention are as follows: the rope arrangement function is completed by using a screw with a unidirectional thread groove, the manufacturing cost of the screw is low and the manufacturing is simple; the screw is directly connected to the slide table thread, the loss rate of the slide table or the screw is low, and the structural stability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention.

[0034] Figure 1 It is a structural schematic diagram of a self-service aerial work lift;

[0035] Figure 2 It is a schematic diagram of the internal structure of a self-service aerial work lift;

[0036] Figure 3 is an exploded schematic diagram of the driving device;

[0037] Figure 4 A cross-sectional schematic diagram showing that the driving device is arranged in the rope winding shaft;

[0038] Figure 5 is a structural schematic diagram of the main shaft;

[0039] Figure 6 It is a schematic diagram of the connection between the rope arrangement device and the rope winding shaft;

[0040] Figure 7 is a structural schematic diagram of the rope arrangement device;

[0041] Figure 8 One of the explosion schematic diagrams of the rope arrangement device;

[0042] Fig. 9 is a side view of the rope arrangement device;

[0043] Fig.10 The second explosion diagram of the rope arrangement device;

[0044] Fig.11 It is a structural schematic diagram of the rope arrangement device being installed on the frame;

[0045] Fig.12 is a structural schematic diagram of the first braking mechanism;

[0046] Fig.13 is a cross-sectional schematic diagram of the first braking mechanism braking the brake disc;

[0047] Fig.14 for Fig.12 Enlarged view of middle B;

[0048] Fig.15 is a structural schematic diagram of the second braking mechanism;

[0049] Fig.16 for Fig.15 A magnified view of middle;

[0050] Fig.17 is an exploded schematic diagram of the braking device;

[0051] Fig.18 is a structural schematic diagram of the control rocker arm;

[0052] Fig.19 is a schematic diagram of the connection between the control rocker arm and the adapter;

[0053] Fig. 20 for Fig.19 Enlarged view of middle C;

[0054] Fig.21 is an exploded schematic diagram of the control rocker arm and the adapter;

[0055] Fig. 22 It is a structural schematic diagram of the rope tightener being installed on the frame;

[0056] Fig.23 is a schematic structural diagram of the rope tightener;

[0057] Fig.24 is a schematic diagram of an explosion of the rope tightener;

[0058] Fig.25 It is a schematic diagram of the structure of the rope tightener clamping the rope;

[0059] In the figure: 1, frame; 11, housing; 12, safety strap;

[0060] 2. Rope winding shaft; 21. Rope; 22. Driving plate;

[0061] 3. Rope guide; 31. Screw; 32. Slide; 321. Guide wheel; 322. Rope guide frame; 33. First transmission path; 331. First steering gear; 34. Second transmission path; 341. Second steering gear; 35. Direction-changing drive mechanism; 351. Direction-changing planetary carrier; 352. Steering drive gear; 353. Continuous prime mover; 354. Intermittent driven member; 355. Rope-guiding synchronous shaft; 356. Direction-changing sun gear; 357. Speed ​​reduction mechanism; 358. Support rod; a. First angle; b. Second angle;

[0062] 4. Driving device; 41. Support cylinder; 42. External rotary driver; 421. Internal stator; 422. External rotor; 43. Driving cylinder; 44. Driving planet carrier; 45. Main shaft; 451. Driving sun gear; 452. Brake disc; 46. Multi-stage planetary reduction mechanism; 47. Protective cylinder;

[0063] 5. Braking device; 51. First braking mechanism; 511. First disc brake pad; 512. Second disc brake pad; 513. Screw push rod; 514. Connecting rod mechanism; 515. Second through hole; 516. Second virtual position; 517. Second reset member; 52. Second braking mechanism; 521. Drum brake pad; 522. Expanding and contracting member; 523. First through hole; 524. First virtual position; 53. Linking shaft; 531. First top block; 532. Second top block;

[0064] 6. Control rocker arm; 61. Adapter; 62. Inner cavity; 621. Arc-shaped opening; 622. Relatively narrow portion; 623. Relatively wide portion; 63. Clutch drive member; 631. Buckle groove; 64. Roller; 65. Third reset member; 66. Traction rope; 67. Articulated portion; 68. Fourth reset member;

[0065] 7. Rope tightener; 71. driving shaft; 711. driving pulley; 72. driven shaft; 721. driven pulley; 73. buffer spring; 74. motor; 75. insurance output mechanism; 751. friction fixing ring; 752. rope tightening planetary carrier; 753. rope tightening planetary gear; 754. rope tightening sun gear; 76. adjustable brake mechanism; 761. friction plate. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention.

[0067] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] refer to Figure 1-11 , shows a self-service aerial work lift, including a frame 1, a rope winding shaft 2, a driving device 4, and a rope arrangement device 3; Figure 2 The rope winding shaft 2 is rotatably arranged on the frame 1, and the rope winding shaft 2 is provided with a rope 21 which is retracted and released by winding; Figure 3 and Figure 4 The driving device 4 is used to drive the rope winding shaft 2 to rotate.

[0071] In order to arrange the rope 21 neatly on the rope winding shaft 2, the rope arrangement device 3 is used to arrange the rope 21 during winding; Figure 6-11 The rope arrangement device 3 includes a screw rod 31 having a unidirectional thread groove and arranged parallel to the rope winding shaft 2, a slide 32 that can move axially but is fixedly arranged on the screw rod 31 along the circumferential direction, a first transmission path 33 composed of a single number of gears connected in sequence, a second transmission path 34 composed of a plurality of gears connected in sequence, and a direction-changing drive mechanism 35; the slide 32 is threadedly connected to the screw rod 31, and the slide 32 is driven to move axially by rotating the screw rod 31, and the rope 21 passes through the slide 32; the gear at one end of the first transmission path 33 is connected to the screw rod 31, and the gear at the other end is defined as a first steering gear 331; the gear at one end of the second transmission path 34 is connected to the screw rod 31, and the gear at the other end is defined as a second steering gear 341; the direction-changing drive mechanism 35 includes a steering drive gear 352 that can switch between the first steering gear 331 and the second steering gear 341 to drive one of them, and the steering drive gear 352 rotates synchronously with the rope winding shaft 2. In other words, reference Fig. 9When the steering drive gear 352 is meshed with the first steering gear 331, the steering drive gear 352 drives the screw 31 to rotate through the first transmission path 33, and the screw 31 rotates in the same direction as the rotation drive gear; and when the steering drive gear 352 is meshed with the second steering gear 341, the steering drive gear 352 drives the screw 31 to rotate through the second transmission path 34, and the screw 31 rotates in the opposite direction to the rotation drive gear; in this way, by changing the rotation direction of the screw 31, the direction in which the slide 32 moves axially on the screw 31 is switched; it should be noted that, in the When the rope winding shaft 2 rotates, the screw 31 synchronously drives the slide 32 to move, so that the rope 21 is wound during the movement, so that the rope 21 fills the axial space on the rope winding shaft 2; and after the rope 21 on the rope winding shaft 2 is wound multiple times and fills a layer, it is necessary to lay the rope 21 in the other direction, so as to fill the rope winding shaft 2 back and forth; in this way, the timing for the screw 31 to change the rotation direction is when the rope 21 fills a layer of the axial space of the rope winding shaft 2; in simple terms, if the rope 21 needs to be wound several times to fill a layer of the rope winding shaft 2, when the rope winding shaft 2 rotates several times, the rotation drive gear is switched once.

[0072] Specifically, the above scheme can limit the slide 32 by the frame 1, so that the slide 32 cannot rotate in the circumferential direction. In this way, when the screw 31 rotates, the slide 32 can only move along the axial direction of the screw 31. The structural principle is the prior art, and the lead screw mechanism can be referred to, so it is not shown in the figure. Among them, the first transmission path 33 and the second transmission path 34 can be independent of each other; or based on the consideration of saving space volume and reducing parts, refer to Fig. 9 The first transmission path 33 and the second transmission path 34 partially overlap, that is, some gears belong to both the first transmission path 33 and the second transmission path 34.

[0073] Specifically, in order to accurately grasp the switching timing of the rotating drive gear, refer to Figure 7-10The direction-changing drive mechanism 35 comprises: a direction-changing planetary frame 351, on which a plurality of steering drive gears 352 are provided, and the steering drive gears 352 serve as planetary wheels on the direction-changing planetary frame 351; a rope-arranging synchronous shaft 355, which rotates synchronously with the rope-winding shaft 2, and on which a direction-changing sun gear 356 which rotates synchronously is provided, and the direction-changing sun gear 356 meshes with the steering drive gears 352; an intermittent motion mechanism, comprising a continuous prime mover 353 and an intermittent follower 354, and the continuous prime mover 353 is in contact with the intermittent follower 354. The rope-arranging synchronous shaft 355 is connected by transmission through the speed reduction mechanism 357; the intermittent driven member 354 is connected to the direction-changing planetary frame 351 in synchronous rotation; wherein, the angle between the two adjacent steering drive gears 352 and the central axis of the direction-changing planetary frame 351 is a first angle a, the angle between the first steering gear 331, the second steering gear 341 and the central axis of the direction-changing planetary frame 351 is a second angle b, and the first angle a is twice the second angle b; the rope-arranging synchronous shaft 355 has the same rotation speed as the screw 31. The rope-arranging synchronous shaft 355 has the same rotation speed as the screw 31.

[0074] Specifically, the rope winding shaft 2 rotates synchronously with the rope arranging synchronous shaft 355, and the direction-changing sun gear 356 on the rope arranging synchronous shaft 355 drives the steering drive gear 352 on the direction-changing planetary frame 351 to drive, and the steering drive gear 352 drives the screw 31 to rotate through the first transmission path 33 or the second transmission path 34, thereby moving the slide 32; at the same time, the rope arranging synchronous shaft 355 drives the continuous prime mover 353 to rotate through the reduction mechanism 357, and the continuous prime mover 353 drives the intermittent follower 354 to rotate, and the intermittent follower 354 is intermittent motion. When it moves, the direction-changing planetary frame 351 is rotated a certain angle, so that the rotating The direction driving gear 352 switches between the first steering gear 331 and the second steering gear 341 to drive one of them, so that the screw 31 changes direction; wherein the reduction ratio of the reduction mechanism 357 depends on the number of turns of the rope 21 to cover a layer of the rope winding shaft 2. For example, if the rope 21 needs to be wound 16 times to cover a layer in the axial space of the rope winding shaft 2, the reduction ratio of the reduction mechanism 357 is 16:1. When the rope arranging synchronization shaft 355 rotates 16 times, the continuous prime mover 353 rotates 1 time, thereby causing the intermittent follower 354 to rotate a certain angle, so that the rotating driving gear switches between the first steering gear 331 and the second steering gear 341 to drive one of them.

[0075] To achieve each switching, a rotating driving gear is engaged with one of the first steering gear 331 or the second steering gear 341. Figure 8 and Fig. 9 , the angle between the two adjacent steering drive gears 352 and the central axis of the direction-changing planetary carrier 351 is a first angle a, the angle between the first steering gear 331, the second steering gear 341 and the central axis of the direction-changing planetary carrier 351 is a second angle b, and the first angle a is twice the second angle b; the rotation angle of the intermittent follower 354 each time is equal to the second angle b; in simple terms, refer to Fig. 9 In this embodiment, the first angle a is 120°, the second angle b is 60°, and there are three steering drive gears 352. Initially, one steering gear is meshed with the second steering gear 341. When the direction-changing planetary carrier 351 rotates clockwise once, the steering drive gear 352 is switched from the second steering gear 341 to the first steering gear 331. When the direction-changing planetary carrier 351 rotates clockwise again, the steering drive gear 352 is disengaged from the first steering gear 331, and another steering drive gear 352 is meshed with the second steering gear 341. In this way, as the direction-changing planetary carrier 351 rotates, different steering drive gears 352 are meshed with one of the first steering gear 331 and the second steering gear 341 to achieve the switching of the direction of the screw 31.

[0076] In the above scheme, the continuous prime mover 353 can be an active dial equipped with a cylindrical pin, and the intermittent follower 354 can be a groove wheel. For the convenience of setting, the screw rod 31 can be rotatably arranged on the frame 1; in order to save space, refer to Fig.10 and Fig.11 , the direction-changing planetary carrier 351 and the intermittent driven member 354 can be rotatably sleeved on the rope-arranging synchronous shaft 355; the rope-arranging synchronous shaft 355 is provided with a support rod 358 arranged parallel thereto, and the continuous driving member 353 can be rotatably arranged on the support rod 358; the deceleration mechanism 357 includes a deceleration transmission path composed of a plurality of gears connected in sequence, the gears on the deceleration transmission path are respectively sleeved on the rope-arranging synchronous shaft 355 and the support rod 358, the gears at one end of the deceleration transmission path are synchronously rotatably connected with the rope-arranging synchronous shaft 355, and the gears at the other end are synchronously rotatably connected with the continuous driving member 353. Among them, the gears on the deceleration transmission path include incomplete gears, and the use of incomplete gears for deceleration transmission can make the gears on the deceleration gear path the same size, which is convenient for arrangement in space.

[0077] In the above scheme, in order to avoid excessive friction between the slide 32 and the rope 21, which causes the rope 21 to be worn, Figure 8The slide 32 includes two guide wheels 321 disposed opposite to each other to clamp the rope 21, and the outer circumferential surface of the guide wheel 321 has a hub portion for clamping the rope 21. The slide 32 is provided with a movable rope guide frame 322, and the guide wheel 321 is rotatably disposed on the rope guide frame 322. In this way, the rope 21 is buffered on the slide 32, and even if the rope 21 is wound and moved, it will not have too much friction, which can improve the service life of the rope 21.

[0078] The above scheme is specific, in order to facilitate the user to wear it, so as to be used for high-altitude operations, refer to Figure 1 and Figure 2 The frame 1 is covered with a shell 11, and a safety strap 12 is provided on the frame 1 for the wearer to carry; wherein the safety strap 12 may include a shoulder strap, a waist belt and a leg strap to ensure that the user is tightly connected to the lifter to avoid separation of the user from the lifter at high altitude. The frame 1 should be provided with a power source (not marked in the figure) for powering the external rotary drive 42, such as a rechargeable battery.

[0079] In some specific implementations, in order to minimize the size of the lifter and facilitate its use, reference Figure 2-5 , the rope winding shaft 2 is axially hollow; the driving device 4 is arranged inside the rope winding shaft 2; the driving device 4 includes an axially hollow support cylinder 41, an external rotary driver 42 with a self-locking function, a main shaft 45, a driving cylinder 43 with an inner gear ring, and a driving planetary carrier 44; the external rotary driver 42 includes an inner stator 421 fixedly sleeved on the support cylinder 41 and an outer rotor 422 rotatably sleeved outside the inner stator 421; the outer rotor 422 is fixedly connected to the driving cylinder 43 to rotate synchronously; the driving planetary carrier 44 has a gear meshing with the inner gear ring of the driving cylinder 43 A plurality of planetary gears, the main shaft 45 is arranged in the supporting tube 41 and the main shaft 45 is provided with a driving sun gear 451 which meshes with the planetary gear on the driving planetary carrier 44; a driving plate 22 is provided in the rope winding shaft 2, and the driving planetary carrier 44 is transmission-connected with the driving plate 22; when the main shaft 45 is fixed, the outer rotor 422 drives the driving planetary carrier 44 to rotate, and the driving planetary carrier 44 drives the driving plate 22 to rotate to realize the rotation of the rope winding shaft 2; the rope arranging synchronization shaft 355 is coaxially arranged with the driving plate 22 and is fixedly connected in the circumferential direction.

[0080] In other words, the inner gear ring of the driving cylinder 43, the planetary gears on the driving planetary carrier 44 and the driving sun gear 451 on the main shaft 45 constitute a planetary gear system structure; in the initial state, the main shaft 45 is fixed and the driving sun gear 451 does not rotate. When the external rotary driver 42 is powered, the outer rotor 422 is rotated, and the outer rotor 422 rotates the driving cylinder 43. The inner gear ring of the driving cylinder 43 rotates the driving planetary carrier 44, and the driving planetary carrier 44 drives the driving plate 22 to rotate to realize the rotation of the rope winding shaft 2. By changing the forward and reverse rotation of the external rotary driver 42, the rope winding shaft 2 can be retracted or released to realize the climbing or descending of the elevator. When the external rotary driver 42 is not powered, the self-locking function is utilized to relatively fix the external rotor 422 and the internal stator 421. When the inner gear ring of the driving cylinder 43 and the driving sun gear 451 are both fixed, the driving planet carrier 44 cannot rotate, thereby fixing the rope winding shaft 2 and making it impossible to retract or release the rope 21. The driving device 4 is arranged inside the rope winding shaft 2, which can effectively reduce the size of the device and facilitate the user to wear it.

[0081] For details of the above scheme, please refer to Figure 3 and Figure 4 The driving planetary carrier 44 is connected to a multi-stage planetary reduction mechanism 46, and the planetary carrier of the last stage of the multi-stage planetary reduction mechanism 46 is coaxially arranged and fixedly connected with the driving plate 22 in the rope winding shaft 2; the external rotary drive 42 and the multi-stage planetary reduction mechanism 46 are externally provided with a protective tube 47, and the protective tube 47 is fixedly connected to the frame 1, and the protective tube 47 has an inner gear ring that cooperates with the multi-stage planetary reduction mechanism 46.

[0082] In some specific embodiments, the lifter further comprises a brake device 5, referring to Figure 12-17 The braking device 5 includes a first braking mechanism 51 for braking the main shaft 45 and a second braking mechanism 52 for braking the rope winding shaft 2; a brake disc 452 is provided on the main shaft 45; wherein, with reference to Fig.12 , Fig.13 and Fig.17 The first brake mechanism 51 includes a first brake pad 511 and a second brake pad 512 respectively arranged on both sides of the brake disc 452. The second brake pad 512 is driven by a screw push rod 513 to move closer to or away from the first brake pad 511. The screw push rod 513 is connected to a connecting rod mechanism 514. The screw push rod 513 is rotated by driving the connecting rod mechanism 514. The brake disc 452 is fixed by the first brake pad 511 and the second brake pad 512, so that the driving sun gear 451 on the main shaft 45 is fixed. Fig.15 , Fig.16 and Fig.17 The second brake mechanism 52 includes two drum brake pads 521 disposed in the rope winding shaft 2, and an expansion and contraction member 522 for opening the two drum brake pads 521 to rub the rope winding shaft 2. The opening of the two drum brake pads 521 is achieved by rotating the expansion and contraction member 522. After the two drum brake pads 521 are opened, the outer walls of the two drum brake pads 521 rub against the inner wall of the rope winding shaft 2, thereby limiting the rotation of the rope winding shaft 2.

[0083] Under normal conditions, the first brake mechanism 51 keeps braking the main shaft 45, while the second brake mechanism 52 does not brake the rope winding shaft 2; when the user wears the lifter to work at high altitude, the self-locking function of the external rotary driver 42 is used to limit the rotation of the rope winding shaft 2, but when the lifter is out of power, the outer rotor 422 of the external rotary driver 42 cannot rotate, and the drive cylinder 43 is also fixed; at this time, the first brake mechanism 51 can be released from the brake disc 452, so that the drive sun gear 451 on the main shaft 45 can rotate, and the rope winding shaft 2 can be rotated. In this way, the user can land from a high altitude. In addition, when the external rotary driver 42 fails, the external rotary driver 42 cannot maintain its self-locking function, and the drive cylinder 43 cannot be fixed. At this time, the rope winding shaft 2 can be braked by the second brake mechanism 52, and the rope winding shaft 2 can be slowly rotated by controlling the magnitude of the braking force of the second brake mechanism 52 on the rope winding shaft 2, so that the user can land smoothly from a high altitude.

[0084] In the above scheme, in order to facilitate the control of the first braking mechanism 51 and the second braking mechanism 52, reference Fig.14 , Fig.16 and Fig.17The braking device 5 also includes a linkage shaft 53, a first through hole 523 is provided on the expansion and contraction piece 522, and a second through hole 515 is provided on a connecting rod of the connecting rod mechanism 514, and the linkage shaft 53 is inserted into the first through hole 523 and the second through hole 515; the inner wall of the first through hole 523 is provided with a first clamping groove, and the linkage shaft 53 is provided with a first top block 531 corresponding to the first clamping groove, and the first clamping groove is provided with a first virtual position 524 for the first top block 531 to move in a first direction in the circumferential direction; the inner wall of the second through hole 515 is provided with a second clamping groove, and the linkage shaft 53 is provided with a second top block 532 corresponding to the second clamping groove, and the second clamping groove is provided with a second virtual position 516 for the second top block 532 to move in a second direction in the circumferential direction, and the first direction and the second direction are opposite; when the linkage shaft 53 is in the initial position, The first braking mechanism 51 is in a braking state, while the second braking mechanism 52 is in a relaxing state; when the linkage shaft 53 rotates from the initial position to the first direction, the second top block 532 causes the connecting rod mechanism 514 to swing and rotate the spiral push rod 513, thereby relaxing the main shaft 45, and the first top block 531 enters the first virtual position 524; when the linkage shaft 53 rotates from the initial position to the second direction, the first top block 531 causes the expansion and contraction part 522 to rotate, thereby causing the two drum brake pads 521 to open to achieve braking of the rope winding shaft 2, and the second top block 532 enters the second virtual position 516; the two drum brake pads 521 are tightened by the first resetting component, thereby achieving relaxation of the rope winding shaft 2; the spiral push rod 513 is reset by the second resetting component 517 acting on the connecting rod mechanism 514, thereby achieving fixation of the main shaft 45. In this way, the first brake mechanism 51 and the second brake mechanism 52 are controlled through the linkage shaft 53, and the first brake mechanism 51 or the second brake mechanism 52 is controlled respectively by rotating the linkage shaft 53 in different directions.

[0085] In the above scheme, in order to facilitate the user to rotate the linkage shaft 53; Figure 2 , Figure 18-21 The rotation of the linkage shaft 53 is controlled by a control rocker arm 6. An adapter 61 is provided at one end of the control rocker arm 6. The adapter 61 is fixedly connected to the linkage shaft 53. The control rocker arm 6 is arranged on the side of the frame 1. The user holds the control rocker arm 6 and makes the linkage shaft 53 rotate in different directions by lifting or pressing the control rocker arm 6.

[0086] Among them, in order to adapt to the operating postures of different users, refer to Fig.19 , Fig. 20 and Fig.21The control rocker arm 6 has a cavity inside, the adapter 61 is connected to the inner wall of the control rocker arm 6 through a clutch structure, and the clutch structure is stopped by the third reset member 65, so that the adapter 61 and the control rocker arm 6 are fixedly connected; the clutch structure is released by the trigger, so that the adapter 61 and the control rocker arm 6 are rotatably connected. In this way, when the user needs to adjust the initial position of the control rocker arm 6 to a comfortable position, the trigger can be used to contact the stop state of the clutch structure, and then the control rocker arm 6 can be rotated. At this time, the control rocker arm 6 will not drive the adapter 61 to rotate, and the linkage shaft 53 will not rotate either; when the control rocker arm 6 is rotated to a suitable position, the influence of the trigger on the clutch structure is cancelled, and the third composite member makes the clutch structure enter the stop state, the control rocker arm 6 and the rotating member are relatively fixed, and at this time, the initial position of the control rocker arm 6 is re-determined, and it can be lifted or pressed down according to the initial position of the control rocker arm 6 to achieve the rotation of the linkage shaft 53.

[0087] Specifically, in order to facilitate the re-determination of the initial state of the control rocker arm 6, refer to Fig.19 , Fig. 20 and Fig.21 The clutch mechanism includes a plurality of arc-shaped openings 621 arranged on the inner wall of the cavity of the control rocker arm 6, and the arc-shaped openings 621 include a relatively wide portion 623 and a relatively narrow portion 622; a movable roller 64 is correspondingly arranged in an arc-shaped opening 621; the adapter 61 has a cylindrical portion embedded in the cavity of the control rocker arm 6, and a clutch driving member 63 is rotatably arranged on the cylindrical portion, and the clutch driving member 63 has a buckle groove 631 for the roller 64 to enter, and the buckle groove 631 runs through from top to bottom; the clutch driving member 63 is rotated to drive the roller 64 to be located in the relatively wide portion 623 or the relatively narrow portion 622. In other words, when the roller 64 is located in the relatively narrow portion 622, the roller 64 abuts against the cylindrical portion of the adapter 61 and against the inner wall of the inner cavity 62 of the control rocker arm 6, so that the adapter 61 and the control rocker arm 6 are relatively fixed and cannot rotate; when the roller 64 is located in the relatively wide portion 623, the adapter 61 and the control rocker arm 6 can rotate relative to each other.

[0088] refer to Fig.21, the clutch drive member 63 may be provided with two, the two clutch drive members 63 are arranged oppositely on the adapter 61, and the arc-shaped openings 621 corresponding to the two clutch drive members 63 are also arranged oppositely, that is, the relatively wide portion 623 and the relatively narrow portion 622 are arranged at opposite positions. Wherein, the trigger is a traction rope 66 for pulling the clutch drive member 63 to rotate. In other words, when the traction rope 66 is pulled, the two clutch drive members 63 are rotated, so that the two clutch drive members 63 each drive the roller 64 to enter the relatively wide portion 623 in the arc-shaped opening 621. When the traction rope 66 is released, the third reset member 65 causes the clutch drive member 63 to rotate, so that the two clutch drive members 63 each drive the roller 64 to enter the relatively narrow portion 622 in the arc-shaped opening 621.

[0089] In the above scheme, in order to facilitate users of different body shapes to operate the control joystick, refer to Fig.19 and Fig.21 The control rocker arm 6 has a bendable hinge portion 67, and the hinge portion 67 maintains the control rocker arm 6 in a straight state through a fourth reset member 68. In this way, for an obese user, the control rocker arm can be swung outward, and then lifted or pressed down to drive the linkage shaft 53 to rotate; when the control rocker arm is released, the fourth reset member 68 can reset the control rocker arm to keep it in a straight state.

[0090] In some specific application scenarios, for example, if the user needs to descend from the roof of a high-rise building, a lock (not marked in the figure) can be set on the rope 21, and the user first binds the rope 21 to a fixed object on the roof, such as a railing, a column, etc., and then controls the rope winding shaft 2 to release the rope 21, so that the user can walk to the edge of the roof. In the above process, since the user is not in a state of being suspended in the air and the rope 21 is not tightened by gravity, even if the rope winding shaft 2 releases the rope 21, the rope 21 may accumulate in the housing 11, causing the rope 21 to be knotted in the housing 11.

[0091] In order to enable the rope 21 to be smoothly output to the outside of the housing 11 when the rope 21 is tightened without gravity, refer to Figure 2 , Figure 22-25The lifter also includes a rope tightener 7, which includes a driving shaft 71 and a driven shaft 72, wherein the driving shaft 71 is provided with a driving pulley 711, and the driven shaft 72 is provided with a driven pulley 721, wherein the driving pulley 711 and the driven pulley 721 are respectively located on both sides of the rope 21 to clamp the rope 21; the driving shaft 71 is connected to a motor 74 in transmission, and a buffer spring 73 is connected to the driving shaft 71 or the driven shaft 72, and the buffer spring 73 forces the driving pulley 711 or the driven pulley 721 to press against the rope 21. The housing 11 of the lifter should have an outlet for outputting the rope 21, and the rope tightener 7 is arranged near the outlet, and the rope tightener 7 drives the driving shaft 71 to rotate through the motor 74, so that the rope 21 clamped in the driving pulley 711 and the driven pulley 721 is output, so that the rope 21 in the housing 11 of the lifter is straightened. When the user is suspended in the air, the rope 21 itself is tightened under the action of gravity, and the rope 21 can compress the buffer spring 73, so that the active pulley 711 and the driven pulley 721 no longer clamp the rope 21, avoiding friction and slippage between the active pulley 711 and the rope 21, and avoiding wear of the active pulley 711 on the rope 21.

[0092] Furthermore, in the case of tensioning the rope 21 without gravity, if the rotation speed of the rope winding shaft 2 is much lower than the rotation speed of the motor 74 driving the active pulley 711, that is, when the speed of the rope winding shaft 2 releasing the rope 21 is lower than the speed of the active pulley 711 pulling out the rope 21, friction and slippage will occur between the active pulley 711 and the rope 21, thereby causing wear on the rope 21. To avoid this, refer to Fig.24The motor 74 is connected to a safety output mechanism 75, which includes a friction fixing ring 751 with an inner gear ring, a tightening rope planetary carrier 752, a tightening rope planetary gear 753 arranged on the tightening rope planetary carrier 752, and a tightening rope sun gear 754 connected to the motor 74; the tightening rope sun gear 754, the tightening rope planetary gear 753 and the friction fixing ring 751 form a planetary gear system structure; the tightening rope planetary carrier 752 is transmission-connected to the driving shaft 71; the friction fixing ring 751 is externally provided with an adjustable braking mechanism 76 for providing a specified braking force therefor, and the adjustable braking mechanism 76 includes a friction plate 761 for providing friction force to the outer surface of the friction fixing ring 751, and the friction force is adjusted by adjusting the pressure between the friction plate 761 and the outer surface of the friction fixing ring 751. In other words, the friction plate 761 brings a certain rotation resistance to the friction fixing ring 751. When the friction fixing ring 751 is fixed, the motor 74 drives the tight rope planetary gear 753 to rotate through the tight rope sun gear 754, so that the tight rope planetary carrier 752 rotates, and the tight rope planetary carrier 752 drives the active shaft 71 to be active, so that the active pulley 711 drives the rope 21 to output; and when the speed of the rope winding shaft 2 releasing the rope 21 is lower than the speed of the active pulley 711 pulling out the rope 21, the active pulley 711 is also affected. The friction force of the rope 21 makes it more difficult for the tightening rope planetary carrier 752 to rotate, and the load of the motor 74 increases. When the rotational resistance of the tightening rope planetary carrier 752 is greater than the rotational resistance of the friction fixing ring 751, the friction fixing ring 751 rotates, so that the motor 74 cannot drive the tightening rope planetary carrier 752 to rotate; on the one hand, it can prevent the motor 74 from burning out, and on the other hand, it can prevent the active pulley 711 from wearing the rope 21, so that the speed at which the active pulley 711 pulls out the rope 21 adapts to the speed at which the rope winding shaft 2 releases the rope 21.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-service aerial work lift, characterized in that: include: Frame, rope winding shaft, driving device, rope guide; The rope winding shaft is rotatably arranged on the frame, and the rope winding shaft is provided with a rope that is retracted and released by winding; The driving device is used to drive the rope winding shaft to rotate; The rope arranger includes a screw with a unidirectional thread groove and arranged parallel to the rope winding shaft, a slide that can move axially but is fixedly arranged on the screw along the circumferential direction, a first transmission path composed of a single number of gears connected in sequence, a second transmission path composed of a plurality of gears connected in sequence, and a direction-changing drive mechanism; the slide is threadedly connected to the screw, and the slide is driven to move axially by rotating the screw, and the rope passes through the slide; the gear at one end of the first transmission path is connected to the screw, and the gear at the other end is defined as a first steering gear; the gear at one end of the second transmission path is connected to the screw, and the gear at the other end is defined as a second steering gear; the direction-changing drive mechanism includes a steering drive gear that can switch between the first steering gear and the second steering gear to drive one of them; the steering drive gear rotates synchronously with the rope winding shaft; The first transmission path and the second transmission path are independent of each other; or the first transmission path and the second transmission path partially overlap.

2. A self-service aerial work lift according to claim 1, characterized in that: The direction-changing driving mechanism comprises: A direction-changing planetary carrier, on which a plurality of steering drive gears are arranged, and the steering drive gears serve as planetary gears on the direction-changing planetary carrier; A rope-arranging synchronous shaft rotates synchronously with the rope-winding shaft, and is provided with a synchronously rotating direction-changing sun gear, the direction-changing sun gear meshing with the steering drive gear; The intermittent motion mechanism comprises a continuous driving member and an intermittent driven member, wherein the continuous driving member is connected to the rope arrangement synchronous shaft through a speed reduction mechanism; and the intermittent driven member is connected to the direction-changing planetary frame for synchronous rotation; Among them, the angle between two adjacent steering drive gears and the central axis of the changing planetary carrier is a first angle, the angle between the first steering gear, the second steering gear and the central axis of the changing planetary carrier is a second angle, and the first angle is twice the second angle; the rope-arranging synchronization shaft has the same rotation speed as the screw.

3. A self-service aerial work lift according to claim 2, characterized in that: The direction-changing planetary frame and the intermittent driven member are both rotatably connected to the rope-arranging synchronization shaft; the rope-arranging synchronization shaft is provided with a support rod arranged parallel to it, and the continuous driving member is rotatably arranged on the support rod; the reduction mechanism includes a reduction transmission path composed of a plurality of gears connected in sequence, the gears on the reduction transmission path are respectively connected to the rope-arranging synchronization shaft and the support rod, the gear at one end of the reduction transmission path is synchronously rotatably connected with the rope-arranging synchronization shaft, and the gear at the other end is synchronously rotatably connected with the continuous driving member.

4. A self-service aerial work lift according to claim 2, characterized in that: The rope winding shaft is axially hollow; the driving device is arranged inside the rope winding shaft; the driving device includes an axially hollow supporting cylinder, an external rotating driver with a self-locking function, a main shaft, a driving cylinder with an inner gear ring, and a driving planet carrier; The external rotary drive comprises an inner stator fixedly sleeved on the support tube and an outer rotor rotatably sleeved outside the inner stator; The outer rotor is fixedly connected to the driving cylinder for synchronous rotation; the driving planet carrier is provided with a plurality of planetary gears meshing with the inner gear ring of the driving cylinder, the main shaft is arranged in the supporting cylinder and is provided with a driving sun gear meshing with the planetary gears on the driving planet carrier; A driving plate is provided inside the rope winding shaft, and the driving planet carrier is drivingly connected to the driving plate; when the main shaft is fixed, the outer rotor drives the driving planet carrier to rotate, and the driving planet carrier drives the driving plate to rotate to realize the rotation of the rope winding shaft; The rope-arranging synchronous shaft is coaxially arranged with the driving plate and is fixedly connected in the circumferential direction.

5. A self-service aerial work lift according to claim 4, characterized in that: The driving planetary carrier is connected to a multi-stage planetary reduction mechanism, and the planetary carrier of the last stage of the multi-stage planetary reduction mechanism is coaxially arranged and fixedly connected to the driving plate in the rope winding shaft; the external rotary drive and the multi-stage planetary reduction mechanism are provided with a protective tube, and the protective tube is fixedly connected to the frame, and the protective tube has an internal gear ring that cooperates with the multi-stage planetary reduction mechanism.

6. A self-service aerial work lift according to claim 4, characterized in that: The invention comprises a braking device, wherein the braking device comprises a first braking mechanism for braking the main shaft and a second braking mechanism for braking the rope winding shaft; a brake disc is provided on the main shaft; The first brake mechanism comprises a first disc brake pad and a second disc brake pad respectively arranged on both sides of the brake disc, the second disc brake pad is driven by a spiral push rod to move closer to / away from the first disc brake pad; the spiral push rod is connected to a connecting rod mechanism; the spiral push rod is driven to rotate. The second braking mechanism comprises two drum brake pads arranged in the rope winding shaft and an expansion and contraction member used to open the two drum brake pads to rub the rope winding shaft, and the opening of the two drum brake pads is achieved by rotating the expansion and contraction member.

7. A self-service aerial work lift according to claim 6, characterized in that: The braking device also includes a linkage shaft, a first through hole is provided on the expansion and contraction piece, a second through hole is provided on a connecting rod of the connecting rod mechanism, and the linkage shaft is inserted into the first through hole and the second through hole; the inner wall of the first through hole is provided with a first clamping groove, and the linkage shaft is provided with a first top block corresponding to the first clamping groove, and the first clamping groove is provided with a first virtual position for the first top block to move in a first direction in the circumferential direction; the inner wall of the second through hole is provided with a second clamping groove, and the linkage shaft is provided with a second top block corresponding to the second clamping groove, and the second clamping groove is provided with a second virtual position for the second top block to move in a second direction in the circumferential direction, and the first direction is opposite to the second direction; when the linkage shaft is in the initial position, The first braking mechanism is in a braking state, while the second braking mechanism is in a relaxing state; when the linkage shaft rotates from an initial position toward a first direction, the second top block causes the connecting rod mechanism to swing and rotate the spiral push rod, thereby relaxing the main shaft, and the first top block enters the first virtual position; when the linkage shaft rotates from an initial position toward a second direction, the first top block causes the expansion and contraction part to rotate, thereby causing the two drum brake pads to open to achieve braking of the rope winding shaft, and the second top block enters the second virtual position; the two drum brake pads are tightened by the first resetting component, thereby achieving relaxation of the rope winding shaft; the spiral push rod is reset by acting on the second resetting component of the connecting rod mechanism, thereby achieving fixation of the main shaft.

8. A self-service aerial work lift according to claim 7, characterized in that: The rotation of the linkage shaft is controlled by a control rocker arm, one end of which is provided with an adapter, which is fixedly connected to the linkage shaft; a cavity is provided inside the control rocker arm, and the adapter is connected to the inner wall of the control rocker arm via a clutch structure, and the stopping state of the clutch structure is achieved by a third reset member, thereby achieving a fixed connection between the adapter and the control rocker arm; the stopping state of the clutch structure is released by a trigger, thereby achieving a rotatable connection between the adapter and the control rocker arm.

9. A self-service aerial work lift according to claim 8, characterized in that: The clutch structure includes a plurality of arc-shaped openings arranged on the inner wall of the cavity of the control rocker arm, and the arc-shaped openings include a relatively wide portion and a relatively narrow portion; a movable roller is correspondingly arranged in an arc-shaped opening; the adapter has a cylindrical portion embedded in the cavity of the control rocker arm, and a clutch driving component is rotatably arranged on the cylindrical portion, and the clutch driving component has a buckle groove for the roller to enter, and the buckle groove runs through from top to bottom; the clutch driving component is rotated to drive the roller to be located in the relatively wide portion or the relatively narrow portion.

10. A self-service aerial work lift according to claim 9, characterized in that: The trigger is a traction rope used to pull the clutch driving member to rotate.

11. A self-service aerial work lift according to claim 9, characterized in that: The control rocker arm is provided with a bendable hinged portion, and the hinged portion maintains the straight state of the control rocker arm through a fourth reset component.

12. A self-service aerial work lift according to any one of claims 1 to 11, characterized in that: It also includes a rope tightener, which includes a driving shaft and a driven shaft, the driving shaft is provided with a driving pulley, the driven shaft is provided with a driven pulley, the driving pulley and the driven pulley are respectively located on both sides of the rope to clamp the rope; the driving shaft is connected to the motor transmission, the driving shaft or the driven shaft is connected with a buffer spring, the buffer spring prompts the driving pulley or the driven pulley to press against the rope.

13. A self-service aerial work lift according to claim 12, characterized in that: The motor is connected to a safety output mechanism, which includes a friction fixing ring with an inner gear ring, a tightening rope planetary carrier, a tightening rope planetary wheel arranged on the tightening rope planetary carrier, and a tightening rope sun wheel connected to the motor; the tightening rope sun wheel, the tightening rope planetary wheel and the friction fixing ring form a planetary gear train structure; the tightening rope planetary carrier is transmission-connected to the driving shaft; an adjustable braking mechanism is provided outside the friction fixing ring to provide a specified braking force for it, and the adjustable braking mechanism includes a friction plate for providing friction force to the outer surface of the friction fixing ring, and the friction force is adjusted by adjusting the pressure between the friction plate and the outer surface of the friction fixing ring.

14. The self-service aerial work lift according to claim 1, characterized in that: The frame is covered with a shell, and a safety strap for the wearer to carry is arranged on the frame.

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