Foldable shear fork type electric lifting operation device and method

Abstract

The invention belongs to the technical field of electric lifting devices, and discloses a foldable shear fork type electric lifting operation device which comprises a rack, self-locking wheels and a ladder stand, the self-locking wheels are installed at the four corners of the bottom of the rack, and the foldable shear fork type electric lifting operation device further comprises a lifting mechanism arranged at the top of the rack; and the aerial platform is arranged at the top of the lifting mechanism. The first driving motor drives the first threaded shaft to rotate so as to drive the lifting mechanism, the whole lifting mechanism can stretch out and draw back, the supporting mechanisms are arranged on the first connecting arms, and when the two first connecting arms synchronously move towards each other or away from each other, the two supporting mechanisms synchronously stretch out of or retract into the rack; the supporting mechanism extends out of the rack for supporting while the movable mechanism is lifted, the height change of the movable mechanism is in direct proportion to the extending length of the supporting mechanism, the requirement of the movable mechanism for the supporting area at different heights is met, and stable supporting of the device is achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of electric lifting devices, specifically a foldable scissor-type electric lifting device and method. Background Technology

[0002] Scissor lifts (also known as scissor lift platforms or scissor-type aerial work platforms) are aerial work equipment that uses a cross scissor arm as its core structure and is driven by an electro-hydraulic system to achieve vertical lifting. They are widely used in construction, equipment maintenance, logistics warehousing, municipal engineering and other fields, and are a highly efficient and safe alternative to traditional scaffolding.

[0003] In the existing technology, the working height of the scissor lift is controlled according to actual needs. When the working height changes, it is necessary to control the extension bracket inside the lifting device to extend out and support it on the ground to increase the support area and prevent the device from tipping over. However, the extension bracket is generally manually controlled. Different working heights require different support areas, and manual control cannot accurately control the situation. Therefore, improvements are made to address the above problems. Summary of the Invention

[0004] To address the issue raised in the background art that extended supports are generally manually controlled, and that different working heights require different support areas, making precise manual control impossible, this invention provides a foldable scissor-type electric lifting device and method.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a foldable scissor lift electric lifting device, comprising a frame, self-locking wheels, and a ladder, wherein the self-locking wheels are installed at the four corners of the bottom of the frame, and further comprising: A lifting mechanism is disposed on the top of the platform; An aerial platform, which is mounted on top of the lifting mechanism; An activity mechanism, which is located on top of the aerial platform; A first drive mechanism is disposed inside the platform and is used to control the extension of the lifting mechanism; A support mechanism is provided inside the platform and connected to the bottom of the lifting mechanism. When the lifting mechanism extends, it can simultaneously drive the support mechanism to extend out from inside the platform. The second drive mechanism is located inside the aerial platform and is used to control the horizontal movement of the movable mechanism. A synchronization mechanism is provided inside the aerial platform and extends into the platform frame. The synchronization mechanism is used to synchronously drive the support mechanism to move when the moving mechanism moves.

[0006] Preferably, the lifting mechanism includes a first connecting arm, a cross scissor arm, a second connecting arm, a toothed plate, and a gear. The first connecting arm is slidably connected to the top of the platform, and the second connecting arm is slidably connected to the bottom of the aerial platform. Two first connecting arms and two second connecting arms are respectively provided and hinged to the two ends of the cross scissor arm. The toothed plate is fixedly installed on one opposite end of the two second connecting arms. The gear is rotatably connected to the inside of the aerial platform and meshes with the two toothed plates respectively. The toothed plates are located inside the aerial platform.

[0007] Preferably, the active mechanism includes an active platform and a first connecting plate, the first connecting plate being symmetrically installed at the bottom of the active platform, and the active platform being slidably connected to the aerial platform.

[0008] Preferably, the first drive mechanism includes a first drive motor and a first threaded shaft. The first drive motor is fixedly installed inside the frame, and the first threaded shaft is symmetrically installed on the output shafts at both ends of the first drive motor. When the first drive motor drives the first threaded shaft to rotate, it can drive the two symmetrically distributed first connecting arms to move synchronously towards or away from each other.

[0009] Preferably, the support mechanism includes a second connecting plate, a support arm, a first hydraulic cylinder, and a second hydraulic cylinder. The second connecting plate is fixedly connected to the first connecting arm via the second hydraulic cylinder. The support arm is engaged with the second connecting plate and slidably connected to the frame. The first hydraulic cylinder is fixedly installed at the end of the support arm away from the second connecting plate.

[0010] Preferably, the second drive mechanism includes a second drive motor and a second threaded shaft. The second drive motor is fixedly connected to the aerial platform, and the second threaded shaft is mounted on the output shafts at both ends of the second drive motor. The second threaded shaft is threadedly connected to the first connecting plate. When the second drive motor drives the second threaded shaft to rotate, it can drive the movable platform to move along the axial direction of the second threaded shaft through the first connecting plate.

[0011] Preferably, the synchronization mechanism includes a multi-section telescopic rod and connecting pipes. The fixed end of the multi-section telescopic rod is installed inside the aerial platform, and the movable end is fixedly connected to the first connecting plate. The hydraulic oil inside the multi-section telescopic rod is exchanged with two second hydraulic cylinders on the same first connecting arm through the connecting pipes.

[0012] Preferably, the ladder is installed on the side of the aerial platform.

[0013] A method for using a foldable scissor lift electric lifting device, applicable to a foldable scissor lift electric lifting device, is as follows: The device is moved to the workstation and initially locked by the self-locking wheels. Then, the staff climbs into the movable mechanism through the ladder and starts the first drive mechanism to drive the lifting mechanism to extend, thereby raising the movable mechanism to the designated working height. During the extension of the lifting mechanism, the support mechanism moves synchronously and extends outward from inside the platform. After the movable mechanism reaches the designated height, the support mechanism stops moving and supports the ground. When the movable mechanism needs to move within a small range to expand the working range, the support mechanism is removed from the ground in advance. Then, the second drive mechanism is activated to move the movable mechanism on the air platform. When the movable mechanism moves, it squeezes one of the synchronous mechanisms to compress and drives the other synchronous mechanism to unfold. Through the exchange of hydraulic oil, the support mechanism connected to the synchronous mechanism also moves to ensure the stability of the device's center of gravity. After the movable mechanism has moved, the support mechanism also stops moving and is supported by the ground.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) The present invention drives the lifting mechanism by rotating the first threaded shaft through the first drive motor, thereby realizing the overall extension and retraction of the lifting mechanism. The support mechanism is set on the first connecting arm. When the two first connecting arms move synchronously towards or away from each other, the two sets of support mechanisms also extend or retract into the frame synchronously. This realizes that while the movable mechanism is raised, the support mechanism extends out from the frame to provide support. The length of the support mechanism extending out is proportional to the height of the movable mechanism, which meets the support area requirements of the movable mechanism at different heights and realizes the stable support of the device.

[0015] (2) The present invention achieves small-range adjustment of working position by moving the movable mechanism on the air platform. As the movable mechanism moves on the air platform, the positions of the two sets of support mechanisms also change. The direction of the support arm moving outward of the platform is the same as the direction of the movable platform, ensuring that the center of gravity of the device is always in a stable state. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a detailed structural diagram of the lifting mechanism of the present invention; Figure 3 This is a schematic diagram of the internal structure of the test bench of the present invention; Figure 4 This is a partial view of the internal structure of the test bench of the present invention; Figure 5 This is a schematic diagram of the internal structure of the aerial platform of the present invention; Figure 6 This is a detailed structural diagram of the second driving mechanism of the present invention; Figure 7 This is a detailed structural diagram of the synchronization mechanism of the present invention.

[0017] In the diagram: 1. Platform; 11. Self-locking wheel; 12. Ladder; 2. Lifting mechanism; 21. First connecting arm; 22. Cross scissor arm; 23. Second connecting arm; 24. Toothed plate; 25. Gear; 3. Aerial platform; 4. Movable mechanism; 41. Movable platform; 42. First connecting plate; 5. First drive mechanism; 51. First drive motor; 52. First threaded shaft; 6. Support mechanism; 61. Second connecting plate; 62. Support arm; 63. First hydraulic cylinder; 64. Second hydraulic cylinder; 7. Second drive mechanism; 71. Second drive motor; 72. Second threaded shaft; 8. Synchronization mechanism; 81. Multi-section telescopic rod; 82. Connecting pipeline. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 7 As shown, the present invention provides a foldable scissor lift electric lifting device, including a frame 1, self-locking wheels 11, and a ladder 12. The self-locking wheels 11 are installed at the four corners of the bottom of the frame 1, and the device also includes: Lifting mechanism 2 is located on top of platform 1; The aerial platform 3 is located on top of the lifting mechanism 2, and the ladder 12 is installed on the side of the aerial platform 3. Activity mechanism 4 is located on top of aerial platform 3; The first drive mechanism 5 is disposed inside the platform 1 and is used to control the extension of the lifting mechanism 2; Support mechanism 6 is located inside the platform 1 and connected to the bottom of the lifting mechanism 2. When the lifting mechanism 2 extends, it can simultaneously drive the support mechanism 6 to extend out from inside the platform 1. The second drive mechanism 7 is located inside the aerial platform 3 and is used to control the horizontal movement of the movable mechanism 4. Synchronization mechanism 8 is located inside the aerial platform 3 and extends into the frame 1. Synchronization mechanism 8 is used to synchronously drive the support mechanism 6 to move when the movable mechanism 4 moves.

[0020] The above solution, through the cooperation of the platform 1, lifting mechanism 2, aerial platform 3, movable mechanism 4, first drive mechanism 5, support mechanism 6, second drive mechanism 7 and synchronization mechanism 8, achieves foldable storage and electric precise lifting of the device. During the lifting process of the movable mechanism 4, the support mechanism 6 extends synchronously within the platform 1 without manual operation, improving the convenience of the device. At the same time, the support position of the support mechanism 6 can be changed when the movable platform 41 moves within a small range, ensuring the stability of the device's center of gravity and guaranteeing stability and safety during operation, making it suitable for various high-altitude operation scenarios.

[0021] like Figure 2 As shown, the lifting mechanism 2 includes a first connecting arm 21, a cross scissor arm 22, a second connecting arm 23, a toothed plate 24, and a gear 25. The first connecting arm 21 is slidably connected to the top of the platform 1, and the second connecting arm 23 is slidably connected to the bottom of the aerial platform 3. There are two first connecting arms 21 and two second connecting arms 23 respectively, and they are respectively hinged to the two ends of the cross scissor arm 22. The toothed plate 24 is fixedly installed on the opposite end of the two second connecting arms 23. The gear 25 is rotatably connected to the inside of the aerial platform 3 and meshes with the two toothed plates 24 respectively. The toothed plates 24 are located inside the aerial platform 3.

[0022] By adopting the above scheme, the lifting mechanism 2 can be smoothly extended and retracted through the hinged engagement between the first connecting arm 21, the cross scissor arm 22 and the second connecting arm 23, and the meshing engagement between the toothed plate 24 and the gear 25. At the same time, it ensures that the two second connecting arms 23 move synchronously, avoids the tilting of the aerial platform 3, and improves the stability and synchronicity of the lifting process.

[0023] like Figure 5 As shown, the active mechanism 4 includes an active platform 41 and a first connecting plate 42. The first connecting plate 42 is symmetrically installed at the bottom of the active platform 41, and the active platform 41 is slidably connected to the aerial platform 3.

[0024] By adopting the above scheme, the sliding cooperation between the movable platform 41 and the aerial platform 3, and the fixed cooperation between the first connecting plate 42 and the movable platform 41, the horizontal movement of the movable platform 41 at high altitude is realized, expanding the working range. At the same time, the symmetrical arrangement of the first connecting plate 42 ensures the balanced force on the movable platform 41 during movement and avoids deviation.

[0025] like Figure 3 As shown, the first drive mechanism 5 includes a first drive motor 51 and a first threaded shaft 52. The first drive motor 51 is fixedly installed inside the frame 1. The first threaded shaft 52 is symmetrically installed on the output shafts at both ends of the first drive motor 51. When the first drive motor 51 drives the first threaded shaft 52 to rotate, it can drive the two symmetrically distributed first connecting arms 21 to move synchronously towards or away from each other.

[0026] The above solution achieves electric control of the extension and retraction of the lifting mechanism 2 through the transmission cooperation between the first drive motor 51 and the first threaded shaft 52, and the threaded cooperation between the first threaded shaft 52 and the first connecting arm 21. This eliminates the need for manual operation and improves work efficiency. At the same time, the symmetrically arranged first threaded shaft 52 ensures that the two first connecting arms 21 move synchronously, ensuring a smooth lifting process.

[0027] like Figure 3 and Figure 4 As shown, the support mechanism 6 includes a second connecting plate 61, a support arm 62, a first hydraulic cylinder 63, and a second hydraulic cylinder 64. The second connecting plate 61 is fixedly connected to the first connecting arm 21 through the second hydraulic cylinder 64. The support arm 62 is engaged with the second connecting plate 61 and slidably connected to the frame 1. The first hydraulic cylinder 63 is fixedly installed at the end of the support arm 62 away from the second connecting plate 61.

[0028] By adopting the above solution, the synchronous extension and retraction of the support mechanism 6 and the lifting mechanism 2 are achieved through the fixed cooperation between the second connecting plate 61 and the first connecting arm 21, the sliding cooperation between the support arm 62 and the platform 1, and the transmission cooperation between the first hydraulic cylinder 63, the second hydraulic cylinder 64 and the support arm 62 and the second connecting plate 61. At the same time, the first hydraulic cylinder 63 can be closely attached to the ground, improving the support stability of the device during high-altitude operation and preventing the device from tipping over.

[0029] like Figure 6 As shown, the second drive mechanism 7 includes a second drive motor 71 and a second threaded shaft 72. The second drive motor 71 is fixedly connected to the aerial platform 3. The second threaded shaft 72 is installed on the output shafts at both ends of the second drive motor 71. The second threaded shaft 72 is threadedly connected to the first connecting plate 42. When the second drive motor 71 drives the second threaded shaft 72 to rotate, it can drive the movable platform 41 to move along the axial direction of the second threaded shaft 72 through the first connecting plate 42.

[0030] By adopting the above solution, the electric control of the horizontal movement of the movable platform 41 is realized through the transmission cooperation between the second drive motor 71 and the second threaded shaft 72, and the threaded cooperation between the second threaded shaft 72 and the first connecting plate 42. The operation is precise and convenient, and the position of the movable platform 41 can be flexibly adjusted to meet the needs of different work points.

[0031] like Figures 5 to 7 As shown, the synchronization mechanism 8 includes a multi-section telescopic rod 81 and a connecting pipe 82. The fixed end of the multi-section telescopic rod 81 is installed inside the aerial platform 3, and the movable end is fixedly connected to the first connecting plate 42. The hydraulic oil inside the multi-section telescopic rod 81 is exchanged with two second hydraulic cylinders 64 on the same first connecting arm 21 through the connecting pipe 82.

[0032] The above solution achieves synchronous linkage between the movement of the movable mechanism 4 and the movement of the support mechanism 6 by means of the fixed cooperation between the multi-section telescopic rod 81 and the first connecting plate 42, and the hydraulic oil exchange cooperation between the multi-section telescopic rod 81 and the second hydraulic cylinder 64 through the connecting pipe 82. This ensures that the center of gravity of the device remains stable when the movable platform 41 moves, and avoids tilting of the device due to the shift of the center of gravity.

[0033] Working principle and usage process of this invention: First, the device is moved to the designated work position by using the self-locking wheels 11. The self-locking function of the self-locking wheels 11 is used to achieve the initial locking of the device, ensuring that the device will not slide randomly after it is moved. Subsequently, the staff entered the movable platform 41 via ladder 12, prepared for the operation, and started the first drive motor 51. The first drive motor 51, in conjunction with the first threaded shaft 52, drove the two first connecting arms 21 to move synchronously, thereby causing the cross scissor arms 22 to extend, thus raising the aerial platform 3 and the movable mechanism 4. During this process, the first connecting arm 21, through the cooperation of the second connecting plate 61 and the second hydraulic cylinder 64, drove the support arm 62 to slide along the frame 1 and extend outside the frame 1. When the movable mechanism 4 reached the designated working height, the first drive mechanism 5 stopped working, and the first hydraulic cylinder 63 extended and closely adhered to the ground, achieving stable support for the device, and the staff could then carry out high-altitude operations. When it is necessary to adjust the work position or make small-scale movements, first control the first hydraulic cylinder 63 to retract, cancel the support mechanism 6 from the ground, and then start the second drive motor 71. Through the cooperation of the second drive motor 71 and the second threaded shaft 72, the first connecting plate 42 is moved, which in turn drives the movable platform 41 to slide along the air platform 3. When the movable platform 41 moves, it will drive the multi-section telescopic rod 81 connected to it to extend and retract. The hydraulic oil exchange between the multi-section telescopic rod 81 and the second hydraulic cylinder 64 is realized through the connecting pipe 82. When one of the multi-section telescopic rods 81 extends, it draws in the hydraulic oil inside the corresponding second hydraulic cylinder 64. At this time, the second hydraulic cylinder 64 is compressed, and the support arm 62 connected to the second hydraulic cylinder 64 moves into the frame 1. Similarly, the other support arm 62 moves out of the frame 1. The direction of the support arm 62 moving out of the frame 1 is the same as the direction of the movable platform 41, ensuring that the center of gravity of the device is always in a stable state. After the activity platform 41 moves to the target location, the second drive mechanism 7 stops working, and the first hydraulic cylinder 63 extends again to fit against the ground, completing the support and fixation. The staff continues to carry out the work. After the work is completed, the first hydraulic cylinder 63 is controlled to retract, and then the first drive motor 51 is started to rotate in the opposite direction, driving the lifting mechanism 2 to retract. The support mechanism 6 is simultaneously retracted into the platform 1. Finally, the self-locking wheels 11 are unlocked, and the device is moved to the designated storage location, completing the entire operation process.

[0034] 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.

[0035] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foldable scissor lift electric lifting device, comprising a platform (1), self-locking wheels (11), and a ladder (12), wherein the self-locking wheels (11) are installed at the four corners of the bottom of the platform (1), characterized in that, Also includes: A lifting mechanism (2) is provided on the top of the platform (1); An aerial platform (3) is located on top of the lifting mechanism (2); The activity mechanism (4) is located on top of the aerial platform (3); The first drive mechanism (5) is disposed inside the platform (1) and is used to control the extension of the lifting mechanism (2); Support mechanism (6), the support mechanism (6) is located inside the platform (1) and connected to the bottom of the lifting mechanism (2), the lifting mechanism (2) can simultaneously drive the support mechanism (6) to extend from inside the platform (1) when it extends; The second drive mechanism (7) is located inside the aerial platform (3) and is used to control the horizontal movement of the moving mechanism (4); Synchronization mechanism (8) is located inside the aerial platform (3) and extends into the platform (1). Synchronization mechanism (8) is used to synchronously drive the support mechanism (6) to move when the moving mechanism (4) moves.

2. The foldable scissor lift electric lifting device according to claim 1, characterized in that: The lifting mechanism (2) includes a first connecting arm (21), a cross scissor arm (22), a second connecting arm (23), a toothed plate (24), and a gear (25). The first connecting arm (21) is slidably connected to the top of the platform (1), and the second connecting arm (23) is slidably connected to the bottom of the aerial platform (3). The first connecting arm (21) and the second connecting arm (23) are provided in twos and are respectively hinged to the two ends of the cross scissor arm (22). The toothed plate (24) is fixedly installed on the opposite end of the two second connecting arms (23). The gear (25) is rotatably connected to the interior of the aerial platform (3) and meshes with the two toothed plates (24) respectively. The toothed plates (24) are located inside the aerial platform (3).

3. The foldable scissor lift electric lifting device according to claim 1, characterized in that: The active mechanism (4) includes an active platform (41) and a first connecting plate (42). The first connecting plate (42) is symmetrically installed at the bottom of the active platform (41). The active platform (41) is slidably connected to the aerial platform (3).

4. The foldable scissor lift electric lifting device according to claim 2, characterized in that: The first drive mechanism (5) includes a first drive motor (51) and a first threaded shaft (52). The first drive motor (51) is fixedly installed inside the frame (1). The first threaded shaft (52) is symmetrically installed on the output shafts at both ends of the first drive motor (51). When the first drive motor (51) drives the first threaded shaft (52) to rotate, it can drive the two symmetrically distributed first connecting arms (21) to move synchronously towards or away from each other.

5. The foldable scissor lift electric lifting device according to claim 3, characterized in that: The support mechanism (6) includes a second connecting plate (61), a support arm (62), a first hydraulic cylinder (63) and a second hydraulic cylinder (64). The second connecting plate (61) is fixedly connected to the first connecting arm (21) through the second hydraulic cylinder (64). The support arm (62) is engaged with the second connecting plate (61) and slidably connected to the frame (1). The first hydraulic cylinder (63) is fixedly installed at one end of the support arm (62) away from the second connecting plate (61).

6. The foldable scissor lift electric lifting device according to claim 3, characterized in that: The second drive mechanism (7) includes a second drive motor (71) and a second threaded shaft (72). The second drive motor (71) is fixedly connected to the aerial platform (3). The second threaded shaft (72) is mounted on the output shafts at both ends of the second drive motor (71). The second threaded shaft (72) is threadedly connected to the first connecting plate (42). When the second drive motor (71) drives the second threaded shaft (72) to rotate, it can drive the movable platform (41) to move along the axial direction of the second threaded shaft (72) through the first connecting plate (42).

7. The foldable scissor lift electric lifting device according to claim 5, characterized in that: The synchronization mechanism (8) includes a multi-section telescopic rod (81) and a connecting pipe (82). The fixed end of the multi-section telescopic rod (81) is installed inside the aerial platform (3), and the movable end is fixedly connected to the first connecting plate (42). The hydraulic oil inside the multi-section telescopic rod (81) is exchanged with two second hydraulic cylinders (64) on the same first connecting arm (21) through the connecting pipe (82).

8. The foldable scissor lift electric lifting device according to claim 1, characterized in that: The ladder (12) is installed on the side of the aerial platform (3).

9. A method of using a foldable scissor lift device, applied to the foldable scissor lift device as described in claim 1, characterized in that... The specific method is as follows: The device is moved to the work station and initially locked by the self-locking wheels (11). Then, the staff climbs into the movable mechanism (4) through the ladder (12) and starts the first drive mechanism (5) to drive the lifting mechanism (2) to extend, thereby raising the movable mechanism (4) to the specified working height. During the extension of the lifting mechanism (2), the support mechanism (6) moves synchronously and extends outward from inside the platform (1). After the movable mechanism (4) reaches the specified height, the support mechanism (6) stops moving and supports the ground. When the movable mechanism (4) needs to move within a small range to expand the working range, the support mechanism (6) is disconnected from the ground in advance. Then, the second drive mechanism (7) is started to drive the movable mechanism (4) to move on the air platform (3). When the movable mechanism (4) moves, it squeezes one of the synchronization mechanisms (8) to compress and drive the other synchronization mechanism (8) to unfold. Through the exchange of hydraulic oil, the support mechanism (6) connected to the synchronization mechanism (8) also moves to ensure the stability of the device's center of gravity. After the movable mechanism (4) has moved, the support mechanism (6) also stops moving and is supported by the ground.

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