Aerial work platform flexible lifting device

Abstract

This application relates to the field of special operation vehicle technology, and in particular to a flexible lifting device for aerial work platforms. Installed on a leveling mechanism connected to the work bucket, the lifting device includes an electrically controlled rotary table, a support frame, a winding mechanism, a lifting rope, an extension arm, a pulley, a hook, and a telescopic power unit. The support frame is mounted on the electrically controlled rotary table, which drives the support frame to rotate around a vertical axis. The winding mechanism is mounted on the top of the support frame. One end of the extension arm is hinged to the middle of the support frame, and the pulley is rotatably connected to the other end of the extension arm. One end of the lifting rope is fixed to the winding mechanism, and the middle of the rope is wound around the pulley. The hook is fixed to the other end of the rope. The two ends of the telescopic power unit are respectively connected to the middle of the extension arm and the electrically controlled rotary table. The flexible lifting device for aerial work platforms of this application allows for more flexible operation because the position, height, and horizontal distance of the pulley relative to the work bucket can be appropriately adjusted.

Description

Technical Field

[0001] This application relates to the field of special operation vehicle technology, and in particular to a flexible lifting device for aerial work platforms. Background Technology

[0002] Aerial work platforms are vehicles that are 3 meters or taller, equipped with hydraulic or electric systems that control multiple hydraulic cylinders, and capable of lifting and lowering to perform work. Construction workers can use aerial work platforms to work in the air. They are widely used in high-altitude work fields such as power, street lighting, municipal works, landscaping, communications, airports, shipbuilding (repair), transportation, advertising, and photography.

[0003] For example, Chinese patent application number CN202021334871.4 discloses a winch hook mechanism for a straight boom aerial work platform, including a straight boom aerial work platform. The straight boom aerial work platform is equipped with an on-board power supply inside. A power transmission cable is provided on the upper outer surface of the straight boom aerial work platform. A power socket, an electric winch, and a receiver are provided on one side of the outer surface of the power transmission cable. The power socket is located at the upper end of the electric winch, the receiver is located at the lower end of the electric winch, and the wireless remote control transmitter is located at the rear end of the straight boom aerial work platform.

[0004] Regarding the aforementioned related technologies, the inventors believe that the following defects exist:

[0005] On common aerial work platforms, the position between the fixed pulley of the hook and the work bucket is relatively fixed. In special operations, due to the limitations of special work sites or operational needs, when workers stand inside the work bucket to perform tasks, they cannot flexibly adjust the position of the fixed pulley relative to the work bucket, which makes it difficult to perform tasks and results in insufficient operational flexibility. Utility Model Content

[0006] This application provides a flexible lifting device for aerial work platforms to improve the following technical problems:

[0007] The position between the hoisting rope pulley and the work bucket on a typical aerial work platform is relatively fixed, which makes it difficult to perform tasks and results in insufficient operational flexibility.

[0008] This application provides a flexible lifting device for aerial work platforms, which adopts the following technical solution:

[0009] A flexible lifting device for an aerial work platform is installed on a leveling mechanism connected to the work bucket. The lifting device includes an electrically controlled rotary table, a support, a winding mechanism, a lifting rope, an extension arm, a pulley, a hook, and a telescopic power unit. The support is installed on the electrically controlled rotary table, which drives the support to rotate around a vertical axis. The winding mechanism is installed on the top of the support. One end of the extension arm is hinged to the middle of the support. The pulley is rotatably connected to the other end of the extension arm. One end of the lifting rope is fixed to the winding mechanism and is wound or unwound by the winding mechanism. The middle of the lifting rope is wound around the pulley. The hook is fixed to the other end of the lifting rope. The two ends of the telescopic power unit are respectively connected to the middle of the extension arm and the electrically controlled rotary table. As the telescopic power unit gradually lengthens, it drives the extension arm to rotate upward.

[0010] In one feasible technical solution of this application, the electrically controlled rotary table includes a mounting box, a servo rotary motor and a rotating disk. The servo rotary motor is mounted on one side of the mounting box, and the rotating disk is horizontally arranged and rotatably mounted on the top of the mounting box. The mounting box is provided with a gear set for transmission and steering. The output shaft of the servo rotary motor drives the rotating disk to rotate through the gear set. The bracket and the telescopic power unit are both connected to the rotating disk.

[0011] In one feasible technical solution of this application, the bracket includes two side plates and a central shaft. The bottom of the side plates is vertically connected to the rotating disk. The two side plates are arranged at intervals, and the central shaft is perpendicular to the middle of the two side plates.

[0012] In one feasible technical solution of this application, a reinforcing plate is also vertically connected between the outer side surface of the side plate and the top surface of the rotating disk.

[0013] In one feasible technical solution of this application, two spaced positioning rings are provided in the middle of the central shaft, and a rotating ring groove is formed between the two positioning rings. A rotating sleeve is provided at the end of the extension arm away from the pulley, and the rotating sleeve is rotatably installed in the rotating ring groove.

[0014] In one feasible technical solution of this application, the telescopic arm includes a stainless steel tube and a fiberglass tube, the fiberglass tube is fixed to the end of the stainless steel tube away from the hinge, one end of the telescopic power unit is hinged to the bottom of the outer end of the stainless steel tube, and the fiberglass tube has insulating properties.

[0015] In one feasible technical solution of this application, the outer end of the fiberglass pipe is fixed with a wheel support, and the pulley is rotatably connected in the wheel support.

[0016] In one feasible technical solution of this application, the winding mechanism includes a winding drum and a winding motor. The winding drum is rotatably connected between the two side plates, and part of the suspension rope is wound around the winding drum. The winding motor is installed on the outer side of one of the side plates and is used to drive the winding drum to rotate forward or backward.

[0017] In one feasible technical solution of this application, the telescopic power unit includes a piston cylinder, a first hinge seat and a second hinge seat. The first hinge seat is disposed on the rotating disk, and the second hinge seat is disposed at the bottom middle part of the extension arm. The inner end of the piston cylinder is rotatably connected to the first hinge seat, and the outer end of the extension rod of the piston cylinder is rotatably connected to the second hinge seat.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] Starting the electrically controlled rotary table can rotate the support and the extension arm together. The orientation of the extension arm can be freely adjusted according to the operating instructions. Activating the telescopic power unit can rotate the extension arm up or down. Activating the winding mechanism can drive the hoisting rope to wind up or unwind, which can assist in raising and lowering the hook to complete the lifting operation. Since the position, height, and horizontal distance of the pulley relative to the work bucket can be adjusted appropriately, the operation is more flexible. It is beneficial to assist the workers in standing in the work bucket to complete various tasks smoothly, reducing the restriction of high-altitude operations in special work sites, and is sufficient to meet the operational needs in most situations. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of the flexible lifting device of the aerial work vehicle according to an embodiment of this application.

[0022] Figure 2 This is a schematic diagram of the installation of the lifting device in an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Electrically controlled rotary table; 11. Mounting box; 12. Servo rotary motor; 13. Rotary disk;

[0025] 2. Bracket; 21. Side plate; 22. Central shaft; 23. Reinforcing plate; 24. Positioning ring;

[0026] 3. Winding mechanism; 31. Winding roller; 32. Winding motor;

[0027] 4. Suspension rope;

[0028] 5. Extending arm; 51. Stainless steel pipe; 52. Fiberglass pipe; 53. Rotating sleeve; 54. Wheel support;

[0029] 6. Pulleys;

[0030] 7. Lifting hook;

[0031] 8. Telescopic power unit; 81. Piston cylinder; 82. First hinge seat; 83. Second hinge seat. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0036] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0037] This application discloses a flexible lifting device for aerial work platforms. (Refer to...) Figure 1-2The aerial work platform's flexible lifting device is installed on the leveling mechanism connected to the work bucket. The lifting device includes an electrically controlled rotary table 1, a support 2, a winding mechanism 3, a lifting rope 4, an extension arm 5, a pulley 6, a hook 7, and a telescopic power unit 8. The support 2 is installed on the electrically controlled rotary table 1, which drives the support 2 to rotate around the vertical axis. The winding mechanism 3 is installed on the top of the support 2. One end of the extension arm 5 is hinged to the middle of the support 2, and the pulley 6 is rotatably connected to the other end of the extension arm 5. One end of the lifting rope 4 is fixed to the winding mechanism 3 and is wound or unwound by the winding mechanism 3. The middle of the lifting rope 4 is wound around the pulley 6, and the hook 7 is fixed to the other end of the lifting rope 4. The two ends of the telescopic power unit 8 are respectively connected to the middle of the extension arm 5 and the electrically controlled rotary table 1. As the telescopic power unit 8 gradually lengthens, it drives the extension arm 5 to rotate upward.

[0038] In this embodiment, the electrically controlled rotary table 1 includes a mounting box 11, a servo motor 12, and a rotating disk 13. The servo motor 12 is mounted on one side of the mounting box 11, and the rotating disk 13 is horizontally arranged and rotatably mounted on the top of the mounting box 11. The mounting box 11 is equipped with a gear set for transmission and steering. The output shaft of the servo motor 12 drives the rotating disk 13 to rotate through the gear set. The bracket 2 and the telescopic power unit 8 are both connected to the rotating disk 13. The electrically controlled rotary table 1 designed above has a simple structure, stable operation, compact overall structure, and small size, making it convenient to install and fix on a leveling mechanism with limited space.

[0039] In this embodiment, the support 2 includes two side plates 21 and a central shaft 22. The bottom of the side plates 21 is vertically connected to the rotating disk 13. The two side plates 21 are arranged at intervals, and the central shaft 22 is perpendicular to the middle of the two side plates 21. A reinforcing plate 23 is also vertically connected between the outer surface of the side plates 21 and the top surface of the rotating disk 13. The support 2 designed above has a simple and sturdy structure, is not easily deformed, and has a long service life.

[0040] In this embodiment, in order to ensure stable rotation between the central shaft 22 and the extension arm 5 and to prevent horizontal displacement, two spaced positioning rings 24 are provided in the middle of the central shaft 22, and a rotating ring groove is formed between the two positioning rings 24. A rotating sleeve 53 is provided at the end of the extension arm 5 away from the pulley 6, and the rotating sleeve 53 is rotatably installed in the rotating ring groove.

[0041] To ensure sufficient structural strength of the extension boom 5 and to improve the safety of high-altitude live-line work by achieving insulation, the extension boom 5 includes a stainless steel tube 51 and a fiberglass tube 52. The fiberglass tube 52 is fixed to the end of the stainless steel tube 51 away from the hinge. One end of the telescopic power unit 8 is hinged to the bottom of the outer end of the stainless steel tube 51. The fiberglass tube 52 has insulation properties. A wheel support 54 is fixed to the outer end of the fiberglass tube 52, and a pulley 6 is rotatably connected in the wheel support 54.

[0042] In this embodiment, the winding mechanism 3 includes a winding roller 31 and a winding motor 32. The winding roller 31 is rotatably connected between two side plates 21, and part of the suspension rope 4 is wound around the winding roller 31. The winding motor 32 is installed on the outer side of one of the side plates 21 and is used to drive the winding roller 31 to rotate forward or backward. The winding mechanism 3 designed above has a simple structure, stable operation, and convenient operation.

[0043] In this embodiment, the telescopic power unit 8 includes a piston cylinder 81, a first hinge seat 82, and a second hinge seat 83. The first hinge seat 82 is located on the rotating disk 13, and the second hinge seat 83 is located at the bottom center of the extension arm 5. The inner end of the piston cylinder 81 is rotatably connected to the first hinge seat 82, and the outer end of the extension rod of the piston cylinder 81 is rotatably connected to the second hinge seat 83. The telescopic power unit 8 designed above has a simple structure, a firm connection, stable operation, and convenient operation.

[0044] The beneficial technical effects of the flexible lifting device for aerial work platforms in this application are roughly as follows:

[0045] Starting the electrically controlled rotary table 1 can drive the support 2 and the extension arm 5 to rotate together. The orientation of the extension arm 5 can be freely adjusted according to the operation command. Starting the telescopic power unit 8 can drive the extension arm 5 to rotate up or down. Then, starting the winding mechanism 3 can drive the hoisting rope 4 to wind up or unwind, which can assist in lifting the hook 7 to complete the lifting operation. Since the position, height, and horizontal distance of the pulley 6 relative to the working bucket can be adjusted appropriately, the operation is more flexible and it is conducive to assisting the workers to stand in the working bucket to complete various tasks smoothly. It reduces the restriction of high-altitude operation in special working sites and is sufficient to meet the operational needs in most cases.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A flexible hoisting device for an aerial work platform, which is installed on a levelling mechanism connected to a work bucket, characterized in that, The lifting device includes an electrically controlled rotary table (1), a support (2), a winding mechanism (3), a lifting rope (4), an extension arm (5), a pulley (6), a hook (7), and a telescopic power unit (8). The support (2) is mounted on the electrically controlled rotary table (1), which drives the support (2) to rotate around a vertical axis. The winding mechanism (3) is mounted on the top of the support (2). One end of the extension arm (5) is hinged to the middle of the support (2). The pulley (6) rotates... The extension arm (5) is connected to the other end of the extension arm (5). One end of the suspension rope (4) is fixed to the winding mechanism (3) and is wound or unwound by the winding mechanism (3). The middle part of the suspension rope (4) is wrapped around the pulley (6). The hook (7) is fixed to the other end of the suspension rope (4). The two ends of the telescopic power unit (8) are respectively connected to the middle part of the extension arm (5) and the electrically controlled rotating table (1). When the telescopic power unit (8) gradually becomes longer, it drives the extension arm (5) to rotate upward.

2. The aerial work platform vehicle flexible hoist of claim 1, wherein, The electrically controlled rotary table (1) includes a mounting box (11), a servo rotary motor (12), and a rotating disk (13). The servo rotary motor (12) is mounted on one side of the mounting box (11). The rotating disk (13) is horizontally arranged and rotatably mounted on the top of the mounting box (11). The mounting box (11) is equipped with a gear set for transmission and steering. The output shaft of the servo rotary motor (12) drives the rotating disk (13) to rotate through the gear set. The bracket (2) and the telescopic power unit (8) are both connected to the rotating disk (13).

3. The aerial device flexible hoistway of claim 2, wherein, The bracket (2) includes two side plates (21) and a central shaft (22). The bottom of the side plates (21) is vertically connected to the rotating disk (13). The two side plates (21) are arranged at intervals, and the central shaft (22) is perpendicular to the middle of the two side plates (21).

4. The aerial work platform of claim 3, wherein, A reinforcing plate (23) is also vertically connected between the outer side of the side plate (21) and the top surface of the rotating disk (13).

5. The aerial device flexible hoistway of claim 3, wherein, Two spaced positioning rings (24) are provided in the middle of the central shaft (22), and a rotating ring groove is formed between the two positioning rings (24). A rotating sleeve (53) is provided at the end of the extension arm (5) away from the pulley (6), and the rotating sleeve (53) is rotatably installed in the rotating ring groove.

6. The aerial device flexible hoist lift of claim 1, wherein, The telescopic arm (5) includes a stainless steel tube (51) and a fiberglass tube (52). The fiberglass tube (52) is fixed to the end of the stainless steel tube (51) away from the hinge. One end of the telescopic power unit (8) is hinged to the bottom of the outer end of the stainless steel tube (51). The fiberglass tube (52) has insulating properties.

7. The aerial device flexible hoistway of claim 6, wherein, The outer end of the fiberglass pipe (52) is fixed with a wheel support (54), and the pulley (6) is rotatably connected in the wheel support (54).

8. The aerial device flexible hoistway of claim 3, wherein, The winding mechanism (3) includes a winding drum (31) and a winding motor (32). The winding drum (31) is rotatably connected between two side plates (21). Part of the suspension rope (4) is wound around the winding drum (31). The winding motor (32) is installed on the outer side of one of the side plates (21). The winding motor (32) is used to drive the winding drum (31) to rotate forward or backward.

9. The aerial device flexible hoistway of claim 2, wherein, The telescopic power unit (8) includes a piston cylinder (81), a first hinge seat (82), and a second hinge seat (83). The first hinge seat (82) is located on the rotating disk (13), and the second hinge seat (83) is located at the bottom of the middle part of the extension arm (5). The inner end of the piston cylinder (81) is rotatably connected to the first hinge seat (82), and the outer end of the telescopic rod of the piston cylinder (81) is rotatably connected to the second hinge seat (83).

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