Aerial work platform lifting structure

Abstract

The utility model discloses a kind of aerial work platform lifting structures, including fixed sleeve, multi-section nested lifting sleeve (first to N lifting sleeve), lifting oil cylinder, chain mechanism and wire rope mechanism.The first lifting sleeve is slidably arranged in the fixed sleeve, the lifting oil cylinder cylinder body in its interior is fixedly connected with the first lifting sleeve, and the piston rod is fixedly connected with the fixed sleeve.The chain mechanism contains two groups of same structure components, and is connected with the fixed sleeve and the second lifting sleeve, adjacent three lifting sleeves by sprocket respectively, and the both ends of chain are fixed to the end of corresponding sleeve;The wire rope mechanism also contains two groups of same structure components, and is connected with the fixed sleeve and the second lifting sleeve, adjacent three lifting sleeves by pulley respectively, and the both ends of wire rope are fixed to the end of corresponding sleeve.The structure is connected with chain and wire rope mechanism by single lifting oil cylinder, realizes multi-section sleeve synchronous lifting, and is strong in rigid support, wind resistance and lateral tilting, and double chain and double wire rope design stress is even, effectively improves operation safety.

Description

Technical Field

[0001] This utility model relates to the field of aerial work platform technology, specifically to a lifting structure for an aerial work platform. Background Technology

[0002] An aerial work platform is a mobile mechanical device that uses a lifting mechanism to transport personnel or equipment to higher altitudes for work. The stability, telescopic synchronization, and lifting efficiency of its lifting mechanism directly affect operational safety and work efficiency.

[0003] Existing aerial work platform lifting mechanisms mainly include scissor lifts, telescopic boom lifts, mast lifts, crank lifts, and spider lifts. Among them, the mast lift achieves lifting through multiple overlapping mast sections, resulting in a compact structure, convenient movement, and particular suitability for operations in confined spaces. Utility model patent CN219670058U discloses a novel lifting mast for aerial work platforms. This device includes a fixed mast, a cylinder bracket, a lifting cylinder, and a mast unit. The mast unit consists of multiple movable masts stacked sequentially from left to right, with adjacent movable masts connected by a sliding fit. However, this structure has the following drawbacks: because the movable masts overlap sequentially from left to right, they are prone to tilting in strong winds; furthermore, the support strength of adjacent movable masts, which are connected by a slider and a groove, is relatively weak. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical defects and provide a lifting structure for an aerial work platform.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a lifting structure for an aerial work platform, comprising a fixed sleeve, a telescopic unit, a lifting cylinder, a chain mechanism, and a wire rope mechanism. The telescopic unit comprises multiple lifting sleeve sections, which are sequentially connected from bottom to top and from outside to inside, and are named sequentially as the first lifting sleeve, the second lifting sleeve, ..., the Nth lifting sleeve. The first lifting sleeve is slidably disposed within the fixed sleeve. A lifting cylinder is provided inside the first lifting sleeve, which includes a cylinder body and a piston rod. The cylinder body is fixed inside the first lifting sleeve, and the piston rod is fixed to the bottom of the fixed sleeve. The chain mechanism includes a first chain mechanism and a second chain mechanism with identical structures. Both include a sprocket and a chain. The first chain mechanism connects a fixed sleeve, a lifting cylinder, and a second lifting sleeve. Its sprocket is rotatably mounted on the top of the lifting cylinder. The chain is fitted onto the sprocket, and both ends of the chain are fixedly connected to the bottom of the fixed sleeve and the bottom of the second lifting sleeve, respectively. The second chain mechanism connects three adjacent lifting sleeves. Its sprocket is rotatably mounted on the top of the side wall of the middle lifting sleeve (the side wall of the middle lifting sleeve has an outwardly protruding sprocket bracket, and the sprocket is rotatably mounted on the sprocket bracket). The chain is fitted onto the sprocket, and both ends of the chain are fixedly connected to the top of the outer side wall of the lifting sleeve and the bottom of the inner side wall of the lifting sleeve, respectively. The wire rope mechanism includes a first wire rope mechanism and a second wire rope mechanism with identical structures, both of which include pulleys and wire ropes. The first wire rope mechanism connects a fixed sleeve, a first lifting sleeve, and a second lifting sleeve. Its pulley is rotatably disposed at the bottom end of the side wall of the first lifting sleeve, and the corresponding wire rope is wound around the pulley. The two ends of the wire rope are respectively fixed to the upper end of the side wall of the fixed sleeve and the lower end of the side wall of the second lifting sleeve. The second wire rope mechanism connects three adjacent lifting sleeves. Its pulley is rotatably disposed at the bottom end of the side wall of the middle lifting sleeve (the side wall of the middle lifting sleeve has a horizontal through hole, and the rope wheel is rotatably disposed in the horizontal through hole). The corresponding wire rope is wound around the pulley, and the two ends of the wire rope are respectively fixed to the upper end of the outer lifting sleeve and the lower end of the inner lifting sleeve.

[0006] Furthermore, the bottom of the first lifting sleeve, the second lifting sleeve, and the fixed sleeve are all provided with a base plate. The bottom end of the cylinder is fixed to the base plate corresponding to the first lifting sleeve, the bottom end of the piston rod is fixed to the base plate corresponding to the fixed sleeve, and the two ends of the chain of the first chain mechanism are respectively fixed to the base plate corresponding to the fixed sleeve and the base plate corresponding to the second lifting sleeve.

[0007] Furthermore, the base plate corresponding to the second lifting sleeve is provided with a through hole one, through which the cylinder body of the lifting cylinder and the chain of the first chain mechanism pass. The base plate corresponding to the first lifting sleeve is provided with a through hole two, through which the chain of the first chain mechanism passes.

[0008] Furthermore, the chain mechanism consists of two chains and two sprockets, with the two chains and two sprockets symmetrically arranged along the vertical centerline of the lifting sleeve.

[0009] Furthermore, multiple second chain mechanisms are staggered on the left and right sides of the lifting mechanism.

[0010] Furthermore, the wire rope mechanism consists of two wire ropes and two pulleys, with the two pulleys and two wire ropes symmetrically arranged along the vertical centerline of the lifting sleeve.

[0011] Furthermore, in the multiple sets of wire rope mechanisms from bottom to top, the distance between the two pulleys in each set of wire rope mechanisms gradually decreases, so that the wire ropes in the multiple wire rope mechanisms are staggered.

[0012] The beneficial effects of this utility model are: This utility model adopts a sleeve structure, with multiple sleeve sections extending to form a rigid support, which has strong resistance to wind load and lateral tilting.

[0013] The fixed sleeve and multiple lifting sleeves are connected by a chain mechanism and a wire rope mechanism. Multiple lifting sleeves can be raised and lowered synchronously by a single lifting cylinder. The lifting speed is fast, stable and without jamming.

[0014] Each chain mechanism includes two sprockets and two chains, and each wire rope includes two pulleys and two wire ropes, ensuring even force distribution and preventing one chain from breaking, which could cause the work platform to descend rapidly, thus improving the safety of the aerial work platform. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the lifting structure of an aerial work platform according to this utility model; Figure 2 This is a schematic diagram of the longitudinal section structure of the lifting structure of an aerial work platform according to this utility model, along the vertical centerline of the lifting sleeve. Figure 3 yes Figure 2 Enlarged view of section A; Figure 4 yes Figure 2 Enlarged view of section B; Figure 5 yes Figure 2 Enlarged view of section C; Figure 6 This is a structural diagram of the lifting cylinder and the first chain mechanism of the lifting structure of an aerial work platform according to this utility model; Figure 7 This is a top view of the base plate corresponding to the second lifting sleeve of the aerial work platform lifting structure of this utility model.

[0016] Figure 8 This is a top view of the base plate corresponding to the first lifting sleeve of the lifting structure of the aerial work platform of this utility model.

[0017] 1. Fixed sleeve; 21. First lifting sleeve; 22. Second lifting sleeve; 23. Third lifting sleeve; 24. Fourth lifting sleeve; 3. Lifting cylinder; 31. Cylinder body; 32. Piston rod; 41. First chain mechanism; 42. Second chain mechanism; 43. Sprocket; 44. Chain; 45. Sprocket bracket; 51. First wire rope mechanism; 52. Second wire rope mechanism; 53. Pulley; 54. Wire rope; 6. Base plate; 61. Through hole one; 62. Through hole two; 7. Moving unit; 8. Swing arm; 9. Working bucket. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0019] Embodiments of this utility model: such as Figure 1 As shown, an aerial work platform includes a mobile unit 7, a rotary table, a lifting structure, a swing arm 8, and a work bucket 9. The mobile unit 7 has a rotary table on its top, the lifting structure is mounted on the rotary table, the swing arm 8 is hinged to the top of the lifting structure, and the work bucket 9 is fixed to the end of the swing arm 8 away from the lifting mechanism. The above is prior art and will not be described in detail here.

[0020] like Figure 1 , 2 As shown, the lifting mechanism includes a fixed sleeve 1, a telescopic unit, a lifting cylinder 3, a chain mechanism, and a wire rope mechanism. The bottom of the fixed sleeve 1 is fixed on the rotary table. The telescopic unit includes multiple lifting sleeves that are sequentially connected from the outside to the inside (the multiple lifting sleeves from the outside to the inside and from the bottom to the top are named the first lifting sleeve 21, the second lifting sleeve 22, and the third lifting sleeve 23. The first lifting sleeve 21 is located at the bottom and is slidably connected to the fixed sleeve 1. The second lifting sleeve 22 and the third lifting sleeve 23 are sequentially connected inside the first lifting sleeve 21 and the second lifting sleeve 22).

[0021] like Figure 2 , 6 As shown, the bottom of the first lifting sleeve 21, the second lifting sleeve 22 and the fixed sleeve 1 are all provided with a base plate 6. The first lifting sleeve 21 is provided with a lifting cylinder 3. The lifting cylinder 3 includes a cylinder body 31 and a piston rod 32 that is slidably disposed in the cylinder body 31. The cylinder body 31 is fixed on the base plate 6 corresponding to the first lifting sleeve 21, and the bottom of the piston rod 32 is fixed on the base plate 6 corresponding to the fixed sleeve 1.

[0022] like Figure 2 , 5As shown in Figure 6, the chain mechanism includes a first chain mechanism 41 and a second chain mechanism 42, both of which have the same structure, including a sprocket 43 and a chain 44. The first chain mechanism 41 connects the fixed sleeve 1, the lifting cylinder 3, and the second lifting sleeve 22. Its sprocket 43 is rotatably mounted on the top of the lifting cylinder 3, and its chain 44 is fitted onto the sprocket 43. Both ends of the chain 44 are fixedly connected to the base plate 6 corresponding to the fixed sleeve 1 and the base plate 6 corresponding to the second lifting sleeve 22, respectively. The second chain mechanism 42 connects three adjacent lifting sleeves, with the first lifting sleeve... Taking cylinder 21, second lifting sleeve 22, and third lifting sleeve 23 as examples, its sprocket 43 is rotatably mounted on the top of the side wall of the second lifting sleeve 22 (the outer side wall of the second lifting sleeve 22 is provided with an outwardly protruding sprocket bracket 45, the sprocket 43 is mounted on the sprocket bracket 45, the sprocket bracket 45 not only has the function of supporting the sprocket 43 but also has the function of limiting the descent range of the adjacent lifting sleeve), its chain 44 is fitted on the sprocket 43, and the two ends of the chain 44 are respectively fixedly connected to the top of the side wall of the first lifting sleeve 21 and the bottom of the side wall of the third lifting sleeve 23.

[0023] like Figure 2 , 3 As shown in Figure 4, the wire rope mechanism includes a first wire rope mechanism 51 and a second wire rope mechanism 52. Both have the same structure, including a pulley 53 and a wire rope 54. The first wire rope mechanism 51 connects the fixed sleeve 1, the first lifting sleeve 21, and the second lifting sleeve 22. Its pulley 53 is rotatably mounted at the bottom end of the side wall of the first lifting sleeve 21. The corresponding wire rope 54 is wound around the pulley 53, and its two ends are respectively fixed to the upper end of the side wall of the fixed sleeve 1 and the lower end of the side wall of the second lifting sleeve 22. The wire rope mechanism 52 connects three adjacent lifting sleeves. Taking the first lifting sleeve 21, the second lifting sleeve 22, and the third lifting sleeve 23 as an example, the pulley 53 is rotatably set at the bottom end of the side wall of the second lifting sleeve 22 (a horizontal through hole is provided on the side wall of the second lifting sleeve 22, which is not shown in the figure, and the pulley 53 is rotatably set in the horizontal through hole). The corresponding wire rope 54 is wound on the pulley 53, and its two ends are respectively fixed at the upper end of the first lifting sleeve 21 and the lower end of the third lifting sleeve 23.

[0024] like Figure 2 , 7 As shown in Figures 7 and 8, the base plate 6 corresponding to the second lifting sleeve 22 is provided with a through hole 61, through which the cylinder body 31 of the lifting cylinder 3 and the chain 44 of the first chain mechanism 41 pass. The base plate 6 corresponding to the first lifting sleeve 21 is provided with a through hole 62, which is different in size from the through hole 61, and is only used for the chain 44 of the first chain mechanism 41 to pass through.

[0025] like Figure 1As shown, the chain mechanism consists of two chains 44 and two sprockets 43, symmetrically arranged along the vertical centerline of the lifting sleeve. Multiple second chain mechanisms 42 are staggered on the left and right sides of the lifting mechanism to avoid mutual interference.

[0026] In the second embodiment, the number of wire ropes 54 and pulleys 53 in the wire rope mechanism are both two, and they are symmetrically arranged along the vertical centerline of the lifting sleeve.

[0027] In the multiple sets of wire rope mechanisms from bottom to top, the distance between the two pulleys 53 gradually decreases, so that the wire ropes 54 in the multiple wire rope mechanisms are staggered.

[0028] Working principle: (taking the lifting mechanism of a four-section lifting sleeve as an example) During the lifting process, the fixed sleeve 1 remains stationary. The lifting of the first lifting sleeve 21 is achieved by the extension and retraction of the lifting cylinder 3. The first lifting sleeve 21, the second lifting sleeve 22, the third lifting sleeve 23, and the fourth lifting sleeve 24 extend and retract synchronously. The lifting of the second lifting sleeve 22, the third lifting sleeve 23, and the fourth lifting sleeve 24 is achieved by the action of the chain mechanism. The lowering of the second lifting sleeve 22, the third lifting sleeve 23, and the fourth lifting sleeve 24 is achieved by gravity and the action of the wire rope mechanism.

[0029] 1. Lifting and lowering of the first lifting sleeve 21: Due to the fixing of the fixed sleeve 1, the piston rod 32 of the lifting cylinder 3 extends, driving the first lifting sleeve 21 to rise, and the piston rod 32 of the lifting cylinder 3 retracts, driving the first lifting sleeve 21 to fall. 2. Lifting of the second lifting sleeve 22: Since one end of the chain 44 in the first chain mechanism 41 is fixed on the fixed sleeve 1 and the other end is fixed on the second lifting sleeve 22, as the lifting cylinder 3 extends and drives the sprocket 43 at its top to move upward, the chain 44 will pull the second lifting sleeve 22 to lift. As the lifting cylinder 3 retracts, it drives the sprocket 43 at its top to descend. Under the action of gravity, the second lifting sleeve 22 descends. At the same time, since one end of the wire rope 54 in the first wire rope mechanism 51 is fixed to the upper end of the fixed sleeve 1 and the other end is fixed to the lower end of the second lifting sleeve 22, as the first lifting sleeve 21 drives the pulley 53 at its bottom to descend, the wire rope 54 will pull the second lifting sleeve 22 to descend. 3. Lifting of the third lifting sleeve 23: Since one end of the chain 44 in the corresponding second chain mechanism 42 is fixed on the first lifting sleeve 21 and the other end is fixed on the third lifting sleeve 23, as the second lifting sleeve 22 drives the sprocket 43 at its top to lift, the chain 44 will drive the third lifting sleeve 23 to lift. As the second lifting sleeve 22 drives its top sprocket 43 to descend, the third lifting sleeve 23 descends under the action of gravity. At the same time, since one end of the wire rope 54 in the corresponding second wire rope mechanism 52 is fixed to the upper end of the first lifting sleeve 21 and the other end is fixed to the lower end of the third lifting sleeve 23, as the second lifting sleeve 22 drives its bottom pulley 53 to descend, the wire rope 54 will pull the third lifting sleeve 23 to descend. 4. Lifting of the fourth lifting sleeve 24: Since one end of the chain 44 in the corresponding second chain mechanism 42 is fixed on the second lifting sleeve 22 and the other end is fixed on the fourth lifting sleeve 24, as the third lifting sleeve 23 drives the sprocket 43 at its top to lift, the chain 44 will drive the fourth lifting sleeve 24 to lift.

[0030] As the third lifting sleeve 23 drives its top sprocket 43 to descend, the fourth lifting sleeve 24 descends under the action of gravity. At the same time, since one end of the wire rope 54 in the corresponding second wire rope mechanism 52 is fixed to the upper end of the second lifting sleeve 22 and the other end is fixed to the lower end of the fourth lifting sleeve 24, as the third lifting sleeve 23 drives its bottom pulley 53 to descend, the wire rope 54 will pull the fourth lifting sleeve 24 to descend.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A lifting structure for an aerial work platform, characterized in that: The system includes a fixed sleeve, a telescopic unit, a lifting cylinder, a chain mechanism, and a wire rope mechanism. The telescopic unit includes multiple lifting sleeve sections, which are sequentially connected from bottom to top and from outside to inside, and are named sequentially as the first lifting sleeve, the second lifting sleeve, ..., the Nth lifting sleeve. The first lifting sleeve is slidably disposed within the fixed sleeve. The first lifting sleeve contains a lifting cylinder, which includes a cylinder body and a piston rod. The cylinder body is fixed within the first lifting sleeve, and the piston rod is fixed at the bottom of the fixed sleeve. The chain mechanism includes a first chain mechanism and a second chain mechanism with identical structures. Both include a sprocket and a chain. The first chain mechanism connects a fixed sleeve, a lifting cylinder, and a second lifting sleeve. Its sprocket is rotatably mounted on the top of the lifting cylinder. The chain is mounted on the sprocket, and both ends of the chain are fixedly connected to the bottom of the fixed sleeve and the bottom of the second lifting sleeve, respectively. The second chain mechanism connects three adjacent lifting sleeves. Its sprocket is rotatably mounted on the top of the side wall of the middle lifting sleeve. The chain is mounted on the sprocket, and both ends of the chain are fixedly connected to the top of the side wall of the outer lifting sleeve and the bottom of the side wall of the inner lifting sleeve, respectively. The wire rope mechanism includes a first wire rope mechanism and a second wire rope mechanism with identical structures, both of which include pulleys and wire ropes. The first wire rope mechanism connects a fixed sleeve, a first lifting sleeve, and a second lifting sleeve. Its pulley is rotatably disposed at the bottom end of the side wall of the first lifting sleeve, and the corresponding wire rope is wound around the pulley. The two ends of the wire rope are respectively fixed to the upper end of the side wall of the fixed sleeve and the lower end of the side wall of the second lifting sleeve. The second wire rope mechanism connects three adjacent lifting sleeves. Its pulley is rotatably disposed at the bottom end of the side wall of the middle lifting sleeve, and the corresponding wire rope is wound around the pulley. The two ends of the wire rope are respectively fixed to the upper end of the outer lifting sleeve and the lower end of the inner lifting sleeve.

2. The lifting structure of an aerial work platform according to claim 1, characterized in that: The bottom of the first lifting sleeve, the second lifting sleeve, and the fixed sleeve are all provided with a base plate. The bottom end of the cylinder is fixed to the base plate corresponding to the first lifting sleeve, the bottom end of the piston rod is fixed to the base plate corresponding to the fixed sleeve, and the two ends of the chain of the first chain mechanism are respectively fixed to the base plate corresponding to the fixed sleeve and the base plate corresponding to the second lifting sleeve.

3. The lifting structure of an aerial work platform according to claim 2, characterized in that: The base plate corresponding to the second lifting sleeve is provided with a through hole one, through which the cylinder body of the lifting cylinder and the chain of the first chain mechanism pass. The base plate corresponding to the first lifting sleeve is provided with a through hole two, through which the chain of the first chain mechanism passes.

4. The lifting structure of an aerial work platform according to claim 1, characterized in that: The chain mechanism consists of two chains and two sprockets, arranged symmetrically along the vertical centerline of the lifting sleeve.

5. The lifting structure for an aerial work platform according to claim 4, characterized in that: Multiple second chain mechanisms are staggered on the left and right sides of the lifting mechanism.

6. The lifting structure of an aerial work platform according to claim 1, characterized in that: The wire rope mechanism consists of two wire ropes and two pulleys, with the two pulleys and two wire ropes symmetrically arranged along the vertical centerline of the lifting sleeve.

7. The lifting structure for an aerial work platform according to claim 6, characterized in that: In the multiple sets of wire rope mechanisms from bottom to top, the distance between the two pulleys in each set of wire rope mechanisms gradually decreases, so that the wire ropes in the multiple wire rope mechanisms are staggered.

Images