Hydraulic lifting safety platform device for high-altitude operation

Abstract

The invention discloses a hydraulic lifting safety platform device for high-altitude operation, and belongs to the field of high-altitude operation equipment. The device comprises a horizontally-arranged base, a working platform arranged above the base and a shear type mechanism arranged between the base and the working platform. The two opposite sides of the shear type mechanism are each provided with a pair of first hydraulic cylinders. The tail ends of the two pairs of first hydraulic cylinders are rotationally connected to the upper surface of the base, and the output ends of the two pairs of first hydraulic cylinders are rotationally connected to the shear type mechanism. The top and the bottom of the shear type mechanism are slidably connected to the working platform and the base correspondingly. The bottom of the shear type mechanism is connected with a positioning mechanism. The first hydraulic cylinder drives the shear type mechanism to move, lifting of the working platform is achieved, after the first hydraulic cylinder fails, the shear type mechanism is locked through the positioning mechanism, and the problem that the working platform falls suddenly can be effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of aerial work equipment, and in particular to a hydraulic lifting safety platform device for aerial work. Background Technology

[0002] With the rapid development of modern industry, construction, logistics, and municipal maintenance, the demand for aerial work is increasing. Hydraulic lifting platforms, as a common type of aerial work equipment, are widely used in various scenarios such as factory construction, equipment installation, warehouse management, and curtain wall cleaning due to their compact structure, stable lifting, large load capacity, and ease of operation.

[0003] Currently, existing hydraulic lifting platforms for aerial work typically consist of a base, a scissor lift mechanism, a hydraulic drive system, and a work platform. Their working principle involves hydraulic cylinders driving the scissor arms to extend or retract, thereby raising or lowering the work platform to the desired height. However, in long-term use, existing hydraulic lifting platform devices still have the following drawbacks: Since most existing lifting platforms rely solely on the self-locking function of the hydraulic system to prevent falls, in the event of sudden situations such as hydraulic line rupture, hydraulic cylinder seal failure, or control valve malfunction, the work platform is highly susceptible to rapid falls, posing a serious threat to operators and ground equipment. Furthermore, when traditional scissor lift mechanisms reach a certain height, the shift in the support point of the scissor lift mechanism causes the work platform to sway, affecting operational accuracy and operator safety. Therefore, there is an urgent need to research and develop a safe hydraulic lifting platform device for aerial work to address these problems. Summary of the Invention

[0004] This invention provides a hydraulic lifting safety platform device for high-altitude operations, which can solve the technical problems existing in the prior art, such as the platform being prone to sudden drop after the hydraulic system fails, and the platform shaking when the support point of the scissor lift mechanism shifts.

[0005] A hydraulic lifting safety platform device for high-altitude operations includes a horizontally arranged base, a working platform arranged above the base, and a scissor mechanism arranged between the base and the working platform; a pair of first hydraulic cylinders are arranged on opposite sides of the scissor mechanism; the tail ends of the two pairs of first hydraulic cylinders are rotatably connected to the upper surface of the base, and the output ends of the two pairs of first hydraulic cylinders are rotatably connected to the scissor mechanism; the top and bottom of the scissor mechanism are slidably connected to the working platform and the base, respectively; a positioning mechanism is connected to the bottom of the scissor mechanism.

[0006] As a preferred embodiment of the present invention, the scissor mechanism includes a pair of crossbar groups arranged side by side; each of the two crossbar groups includes multiple crossbars arranged side by side from top to bottom; each of the multiple crossbars includes a first link and a second link arranged in an X-shape; the first link and the second link are connected by a pin, and the pin is rotatably engaged with the first link and the second link respectively; the end of the first link of one crossbar is rotatably connected to the end of the second link of the adjacent crossbar.

[0007] As a preferred embodiment of the present invention, a pair of first movable shafts parallel to the pin shafts are arranged side by side between the two cross rod groups; the two ends of one first movable shaft are respectively fixed to the first connecting rods of a pair of cross rods at the same horizontal position, and the two ends of the other first movable shaft are respectively fixed to the second connecting rods of the pair of cross rods; the output ends of the two pairs of first hydraulic cylinders are respectively rotatably connected to the two first movable shafts, and the two pairs of first hydraulic cylinders are respectively arranged on the opposite outer sides of the two first movable shafts.

[0008] As a preferred embodiment of the present invention, the bottoms of both crossbar assemblies are connected to the upper surface of the base via a first guide mechanism; the first guide mechanism includes a support strip horizontally fixed to the upper surface of the base; each of the opposite sides of the support strip has a limiting strip parallel to it horizontally fixed; each of the opposite sides of the two limiting strips has a guide groove; a pair of sliders are arranged side by side between the two limiting strips; the two sliders are respectively rotatably connected to the lower end of the first connecting rod and the lower end of the second connecting rod of the bottom crossbar; each of the opposite sides of the two sliders has a pair of rollers rotatably connected side by side; the two pairs of rollers on any one of the sliders are respectively rolled and engaged in the two guide grooves.

[0009] As a preferred embodiment of the present invention, the lower surface of the slider is provided with a receiving groove, and the receiving groove penetrates the other opposite side of the slider; the positioning mechanism includes a bearing strip fixed parallel to the upper surface of the support strip and a first electromagnet fixedly embedded in the upper surface of the slider; the upper surface of the bearing strip is provided with a plurality of slots arranged side by side along the length direction; a push-pull post is vertically arranged on one side of the first electromagnet; the push-pull post slides through the slider; the lower end of the push-pull post extends into the receiving groove and is fixed with a conical block adapted to the slot; a movable piece is horizontally fixed at the upper end of the push-pull post; the lower surface of the movable piece is connected to the upper surface of the slider by a tension spring; an iron piece corresponding to the first electromagnet is horizontally fixed on the lower surface of the movable piece; the iron piece can be attracted by the first electromagnet.

[0010] As a preferred embodiment of the present invention, the tops of both crossbar assemblies are connected to the lower surface of the work platform via a second guide mechanism; the second guide mechanism includes a guide rail horizontally fixed to the lower surface of the work platform; a pair of transmission blocks are arranged side by side below the guide rail; the tops of both transmission blocks have sliding portions; both sliding portions are slidably connected to the guide rail; the two transmission blocks are respectively rotatably connected to the upper ends of the first connecting rod and the second connecting rod of the topmost crossbar member.

[0011] As a preferred embodiment of the present invention, an anti-deviation component connected to two transmission blocks is installed on one side of the guide rail; each of the two transmission blocks has a pair of protrusions arranged side by side on its opposite outer surfaces; the anti-deviation component includes a first rack horizontally fixed to the lower surface of the work platform and a pair of rotating shafts respectively rotatably connected to the two pairs of protrusions; the first rack is arranged parallel to the guide rail; both rotating shafts are arranged horizontally and perpendicular to the rack; a rocker arm is fixed to one end of each of the two rotating shafts; a connecting shaft parallel to the rotating shaft is fixed to both ends of each of the two rocker arms; a one-way gear is fixedly sleeved on one end of each of the two connecting shafts; any one-way gear can mesh with the rack.

[0012] In a preferred embodiment of the present invention, a rotary drive assembly is connected to the rotating shaft; the rotary drive assembly includes a second electromagnet fixedly embedded in one side of the transmission block and a transmission gear fixedly sleeved on the rotating shaft; the second electromagnet is disposed between two protrusions; an adjusting block is disposed between the second electromagnet and the transmission gear; the adjusting block is slidably connected to the opposing inner surfaces of the two protrusions; a magnetic sheet corresponding to the second electromagnet is fixedly attached to the side of the adjusting block near the second electromagnet; when the magnetic properties of the magnetic sheet and the opposing inner surfaces of the second electromagnet are different, the magnetic sheet is attracted by the second electromagnet; when the magnetic properties of the magnetic sheet and the opposing inner surfaces of the second electromagnet are the same, the magnetic sheet is repelled by the second electromagnet; a second rack parallel to the first rack is horizontally fixed to the lower edge of the adjusting block; the second rack meshes with the transmission gear.

[0013] As a preferred embodiment of the present invention, a limiting block is provided between the transmission gear and the adjusting block; the limiting block is fixed on one side of any protrusion; when the magnetic properties of the magnetic sheet and the inner side of the second electromagnet are the same, the side of the adjusting block near the transmission gear is in contact with the side of the limiting block away from the transmission gear.

[0014] As a preferred embodiment of the present invention, a pair of second movable shafts parallel to the pin shafts are arranged side by side between the two crossbar groups; the two ends of one second movable shaft are respectively fixed to the first connecting rod of another pair of crossbars at the same horizontal position, and the two ends of the other second movable shaft are respectively fixed to the second connecting rod of the pair of crossbars; a second hydraulic cylinder is provided on the opposite outer side of each of the two second movable shafts; the tail ends of the two second hydraulic cylinders are respectively rotatably connected to the two second movable shafts; the output ends of the two second hydraulic cylinders are rotatably connected to the lower surface of the working platform.

[0015] This invention provides a hydraulic lifting safety platform device for high-altitude operations. The device uses a first hydraulic cylinder to drive a scissor mechanism to lift and lower the work platform. If the first hydraulic cylinder fails, a positioning mechanism locks the scissor mechanism, which can effectively prevent the work platform from falling suddenly and ensure the safety of the operators. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a hydraulic lifting safety platform device for high-altitude operations provided by the present invention.

[0017] Figure 2 for Figure 1 A structural side view.

[0018] Figure 3 for Figure 1 The main view of the structure.

[0019] Figure 4 This is a schematic diagram of the connection between the positioning mechanism and the first guiding mechanism of the present invention.

[0020] Figure 5 for Figure 4 The main view of the structure.

[0021] Figure 6 This is a schematic diagram of the structure of the first guiding mechanism of the present invention.

[0022] Figure 7 This is a schematic diagram of the connection between the support strip and the load-bearing strip of the present invention.

[0023] Figure 8 This is a schematic diagram of the connection between the scissor mechanism and the second guide mechanism of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the second guide mechanism of the present invention.

[0025] Figure 10 for Figure 9 The main view of the structure.

[0026] Explanation of reference numerals in the attached figures: 1-Base, 2-Working platform, 3-Scissor mechanism, 4-First hydraulic cylinder, 5-Positioning mechanism, 6-First guide mechanism, 7-Second guide mechanism, 8-Second hydraulic cylinder, 31-Cross lever assembly, 32-First movable shaft, 33-Second movable shaft, 51-Bearing bar, 52-First electromagnet, 53-Slot, 54-Push-pull column, 55-Conical block, 56-Moving plate, 57-Tension spring, 58-Iron sheet, 61-Support strip, 62-Limiting strip, 63-Guide groove, 64-Slider, 65-Roller 66-Accommodation slot, 71-Guide rail, 72-Transmission block, 73-Anti-deviation component, 74-Rotary drive component, 311-Cross rod, 721-Sliding part, 722-Protrusion, 731-First rack, 732-Rotating shaft, 733-Swing rod, 734-One-way gear, 741-Second electromagnet, 742-Transmission gear, 743-Adjusting block, 744-Magnetic sheet, 745-Second rack, 746-Limiting block, 3111-First connecting rod, 3112-Second connecting rod, 3113-Pin. Detailed Implementation

[0027] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0028] Example 1: like Figures 1-3 As shown in the figure, an embodiment of the present invention provides a hydraulic lifting safety platform device for high-altitude operations, including a horizontally arranged base 1, a working platform 2 arranged above the base 1, and a scissor mechanism 3 arranged between the base 1 and the working platform 2. The base 1 and the working platform 2 are both conventional structures in the art. A pair of conventional first hydraulic cylinders 4 are arranged on opposite sides of the scissor mechanism 3. The tail ends of the two pairs of first hydraulic cylinders 4 are rotatably connected to the upper surface of the base 1, and the output ends of the two pairs of first hydraulic cylinders 4 are rotatably connected to the scissor mechanism 3. The top and bottom of the scissor mechanism 3 are slidably connected to the working platform 2 and the base 1, respectively. A positioning mechanism 5 is connected to the bottom of the scissor mechanism 3. The scissor mechanism 3 is driven by the first hydraulic cylinders 4 to move, thereby realizing the lifting and lowering of the working platform 2. In the event of failure of the first hydraulic cylinders 4, the scissor mechanism 3 is locked by the positioning mechanism 5, which can effectively prevent the working platform 2 from falling suddenly and ensure the safety of the operator.

[0029] Among them, such as Figures 2-3As shown, the scissor mechanism 3 is a conventional structure in the art, which includes a pair of crossbar groups 31 arranged side by side; each of the two crossbar groups 31 includes multiple crossbars 311 arranged side by side from top to bottom; each of the multiple crossbars 311 includes a first link 3111 and a second link 3112 arranged in an X-shape; the first link 3111 and the second link 3112 are connected by a pin 3113; the pin 3113 is rotatably engaged with the first link 3111 and the second link 3112 respectively, and the two ends of the pin 3113 are respectively located at the middle of the first link 3111 and the middle of the second link 3112; the end of the first link 3111 of one crossbar 311 is rotatably connected to the end of the second link 3112 of the adjacent crossbar 311. By changing the angle between the first link 3111 and the second link 3112, the scissor mechanism 3 drives the work platform 2 to move linearly, thereby realizing the lifting and lowering of the work platform 2 and effectively ensuring the lifting and lowering effect of the work platform 2.

[0030] In addition, such as Figures 2-3 As shown, to ensure the driving stability of the scissor mechanism 3, a pair of first movable shafts 32 parallel to the pin shaft 3113 are arranged side by side between the two crossbar groups 31. The two ends of one first movable shaft 32 are bolted to the first connecting rod 3111 of a pair of crossbar members 311 at the same horizontal position, and the two ends of the other first movable shaft 32 are bolted to the second connecting rod 3112 of the same pair of crossbar members 311. Specifically, the pair of crossbar members 311 is the second crossbar member 311 from bottom to top in the crossbar group 31. The output ends of two pairs of first hydraulic cylinders 4 are rotatably connected to the two first movable shafts 32, and the two pairs of first hydraulic cylinders 4 are respectively located on the opposite outer sides of the two first movable shafts 32. By simultaneously extending and retracting the output ends of the two pairs of first hydraulic cylinders 4, the two first movable shafts 32 move upwards and closer together, thereby enabling the scissor mechanism 3 to drive the working platform 2 to rise and fall, effectively ensuring the motion stability of the scissor mechanism 3.

[0031] Example 2: Based on Example 1, as follows Figures 3-7As shown, in order to ensure the sliding stability and definite sliding direction of the scissor mechanism 3 on the base 1, the bottoms of the two cross rod groups 31 are connected to the upper surface of the base 1 through a first guide mechanism 6. The first guide mechanism 6 includes a support strip 61 that is horizontally bolted to the upper surface of the base 1. The opposite sides of the support strip 61 are horizontally welded with a limiting strip 62 parallel to it. The opposite sides of the two limiting strips 62 are provided with guide grooves 63. A pair of sliders 64 are arranged side by side between the two limiting strips 62. The two sliders 64 are rotatably connected to the lower end of the first connecting rod 3111 and the lower end of the second connecting rod 3112 of the bottom cross rod 311. A pair of rollers 65 are rotatably connected side by side on one opposite side of the two sliders 64. The two pairs of rollers 65 on any slider 64 are respectively rolled and engaged in the two guide grooves 63. During the movement of the first hydraulic cylinder 4 driving the scissor mechanism 3, the scissor mechanism 3 drives the two sliders 64 to make relative linear motion, causing the roller 65 to roll in the guide groove 63, and the circumferential side of the roller 65 abuts against the bottom and top surfaces of the guide groove 63, thereby ensuring the sliding stability of the scissor mechanism 3 on the base 1 and effectively improving the lifting smoothness of the work platform 2. Furthermore, in existing technology, the connection between the scissor mechanism 3 and the base 1 is typically as follows: the lower end of the first connecting rod 3111 of the bottommost cross member 311 is rotatably connected to the base 1, while the lower end of the second connecting rod 3112 of the same cross member 311 is slidably connected to the base 1. The tail end of the first hydraulic cylinder 4 is rotatably connected to the base 1, and the output end of the first hydraulic cylinder 4 is rotatably connected only to either the first connecting rod 3111 or the second connecting rod 3112. In practical use, as the first hydraulic cylinder 4 drives the scissor mechanism 3, the lower end of the second connecting rod 3112 slides on the base 1, causing it to move closer to or further away from the lower end of the first connecting rod 3111. This results in a shift in the support point of the base 1 for the scissor mechanism 3, leading to a significant swaying rate of the work platform 2 when it is raised to a higher position and the operator walks on it. This affects operational accuracy and the operator's safety. Based on this, the present invention designs the connection points between the two pairs of first hydraulic cylinders 4 and the base 1 to be symmetrically arranged about the pin 3113, the two first movable shafts 32 to be symmetrically arranged about the pin 3113, and the lower ends of the first connecting rod 3111 and the second connecting rod 3112 of the bottommost cross member 311 to be symmetrically arranged about the pin 3113. The output ends of the two pairs of first hydraulic cylinders 4 drive the lower ends of the first connecting rod 3111 and the second connecting rod 3112 of the bottommost cross member 311 to move relative to each other through the two first movable shafts 32. The lower ends of the first connecting rod 3111 and the second connecting rod 3112 of the bottommost cross member 311 are always symmetrically arranged about the pin 3113, so that the support points of the base 1 for the scissor mechanism 3 are always symmetrically arranged about the pin 3113. This can effectively improve the support stability of the scissor mechanism 3 for the working platform 2, effectively reduce the sway rate of the working platform 2, and ensure the working accuracy and the psychological safety of the operator.

[0032] Among them, such as Figures 4-7As shown, to prevent the work platform 2 from plummeting after the failure of the first hydraulic cylinder 4, a receiving groove 66 is designed on the lower surface of the slider 64, and the receiving groove 66 extends through the opposite side of the slider 64; the positioning mechanism 5 includes a bearing strip 51 welded parallel to the upper surface of the support strip 61 and a first electromagnet 52 bolted to and embedded in the upper surface of the slider 64; the upper surface of the bearing strip 51 has multiple V-shaped slots 53 arranged side by side along its length; one side of the first electromagnet 52 A vertically arranged push-pull column 54 is inserted into a slider 64. The lower end of the push-pull column 54 extends into a receiving groove 66 and is screwed to a conical block 55 that matches a slot 53. A movable piece 56 is horizontally screwed to the upper end of the push-pull column 54. The lower surface of the movable piece 56 is connected to the upper surface of the slider 64 by a tension spring 57. A corresponding iron piece 58 is horizontally screwed to the lower surface of the movable piece 56. The iron piece 58 can be attracted by the first electromagnet 52. After the first hydraulic cylinder 4 fails, the first electromagnet 52 is energized, causing the iron piece 58 to be attracted by the first electromagnet 52. As the iron piece 58 moves downward, it drives the push-pull column 54 to move downward synchronously. Then, the conical block 55 is inserted into any slot 53, thereby locking the position of the slider 64 and preventing the scissor mechanism 3 from moving, thus avoiding problems such as sudden drops in the work platform 2 and effectively ensuring the personal safety of the operator.

[0033] Example 3: Based on Example 2, as follows Figures 2-3 and Figures 8-9 As shown, since the scissor mechanism 3 is slidably connected to the base 1, in order to ensure the normal operation of the scissor mechanism 3, the tops of the two cross rod groups 31 are connected to the lower surface of the working platform 2 via a second guide mechanism 7. The second guide mechanism 7 includes a guide rail 71 horizontally bolted to the lower surface of the working platform 2; a pair of transmission blocks 72 are arranged side by side below the guide rail 71; the tops of the two transmission blocks 72 are integrally formed with sliding parts 721; the two sliding parts 721 are slidably connected to the guide rail 71; the two transmission blocks 72 are respectively rotatably connected to the upper ends of the first connecting rod 3111 and the second connecting rod 3112 of the topmost cross rod 311. During the movement of the scissor mechanism 3 driven by the first hydraulic cylinder 4, the first connecting rod 3111 and the second connecting rod 3112 of the topmost cross rod 311 respectively drive the transmission blocks 72 on them to slide on the guide rail 71, thereby ensuring the normal operation of the scissor mechanism 3 and realizing the lifting and lowering of the working platform 2.

[0034] Among them, such as Figures 8-9As shown, since the transmission block 72 and the guide rail 71 are in sliding engagement, even when the transmission block 72 is stationary, the guide rail 71 will also slide relative to the transmission block 72, causing the support point of the scissor mechanism 3 on the working platform 2 to shift. Therefore, an anti-shift component 73 connected to the two transmission blocks 72 is designed to be installed on one side of the guide rail 71. A pair of protrusions 722 are integrally formed on the opposite outer surfaces of the two transmission blocks 72. The anti-shift component 73 includes a first rack 731 horizontally bolted to the lower surface of the working platform 2 and a pair of rotating shafts 732 rotatably connected to the two pairs of protrusions 722. The first rack 731 is parallel to the guide rail 71. Both rotating shafts 732 are horizontally arranged and perpendicular to the rack 731. One end of each rotating shaft 732 is screwed to... The rocker arm 733 is symmetrically arranged about the pin shaft 3113. Both ends of the two rocker arms 733 are screwed to a connecting shaft parallel to the rotating shaft 732. One end of each connecting shaft is keyed to a one-way gear 734. Either one-way gear 734 can mesh with the rack 731. Specifically, the rocker arm 733 includes a rod cylinder and a pair of support rods that are slidably inserted into the two ends of the rod cylinder. The middle part of the rod cylinder is screwed to the rotating shaft 732. The two support rods are connected to each other by a tension spring at their close ends. The two connecting shafts are screwed to the two support rods at their far ends. By designing the rocker arm 733 to have an elastic telescopic function, it can ensure the stable meshing of the one-way gear 734 with the first rack 731 and can also realize the rapid separation of the one-way gear 734 from the first rack 731, thus ensuring the switching effect of the one-way gear 734. When the two transmission blocks 72 move in close proximity, the one-way gears 734 on the adjacent ends of the two rocker arms 733 mesh with the first rack 731 respectively. As the transmission blocks 72 slide on the guide rail 71, the one-way gears 734 on the adjacent ends of the two rocker arms 733 also roll on the first rack 731 respectively. Due to the characteristics of the one-way gears 734, even when the transmission blocks 72 are stationary, the guide rail 71 will not slide relative to the transmission blocks 72 when the one-way gears 734 are meshing with the first rack 731, thus ensuring the support of the scissor mechanism 3 for the working platform 2. The support points remain stable and symmetrically distributed. It should be noted that when the two transmission blocks 72 move apart, the rotating shaft 732 drives the swing rod 733 to rotate, causing the one-way gears 734 on the near ends of the two swing rods 733 to separate from the first rack 731, while the one-way gears 734 on the far ends of the two swing rods 733 mesh with the first rack 731. During the sliding process of the transmission block 72 on the guide rail 71, the one-way gears 734 on the far ends of the two swing rods 733 also roll on the first rack 731, thereby ensuring the lifting effect of the scissor mechanism 3 on the working platform 2.

[0035] In addition, such as Figures 8-10As shown, to ensure the driving stability of the rotating shaft 732, a rotary drive assembly 74 is designed to be connected to the rotating shaft 732. The rotary drive assembly 74 includes a second electromagnet 741 bolted to and embedded in one side of the transmission block 72, and a transmission gear 742 keyed to the rotating shaft 732. The second electromagnet 741 is disposed between the two protrusions 722. An adjusting block 743 is disposed between the second electromagnet 741 and the transmission gear 742. The adjusting block 743 is slidably connected to the opposite inner surfaces of the two protrusions 722. A magnetic sheet 744 corresponding to the second electromagnet 741 is glued to the side of the adjusting block 743 near the second electromagnet 741. When the magnetic properties of the magnetic sheet 744 and the opposite inner surfaces of the second electromagnet 741 are different, The magnetic sheet 744 is attracted by the second electromagnet 741; when the magnetic properties of the magnetic sheet 744 and the inner surfaces of the second electromagnet 741 are the same, the magnetic sheet 744 is repelled by the second electromagnet 741; a second rack 745 parallel to the first rack 731 is horizontally welded to the lower edge of the adjusting block 743; the second rack 745 meshes with the transmission gear 742; a limit block 746 is provided between the transmission gear 742 and the adjusting block 743; the limit block 746 is screwed to one side of any protrusion 722; when the magnetic properties of the magnetic sheet 744 and the inner surfaces of the second electromagnet 741 are the same, the side of the adjusting block 743 near the transmission gear 742 and the side of the limit block 746 away from the transmission gear 742 are in contact. When the one-way gears 734 on the near ends of the two rocker arms 733 need to mesh with the first rack 731 respectively, the second electromagnet 741 is first energized, and the magnetic properties between the magnetic plate 744 and the opposite inner surfaces of the second electromagnet 741 are opposite, causing the magnetic plate 744 to move closer to the second electromagnet 741 and be attracted to it. During this process, the magnetic plate 744 pulls the second rack 745 via the adjusting block 743, causing the transmission gear 742 to drive the rotating shaft 732 to rotate, thus enabling the one-way gears 734 on the near ends of the two rocker arms 733 to mesh with the first rack 731 respectively. When the two rocker arms 733 need to be separated... When the one-way gear 734 on one end meshes with the first rack 731, the second electromagnet 741 is energized first, and the magnetic plates 744 and the inner surfaces of the second electromagnet 741 are magnetically identical, causing the magnetic plates 744 to move away from the second electromagnet 741. As the magnetic plates 744 move away from the second electromagnet 741, the magnetic plates 744 pull the second rack 745 through the adjusting block 743, causing the transmission gear 742 to drive the rotating shaft 732 to rotate, so that the one-way gear 734 on one end of the two rocker arms 733 is separated from the first rack 731. The limiting block 746 can limit the adjusting block 743, thereby ensuring the switching effect of the one-way gear 734.

[0036] Example 4: Based on Example 3, as followsFigures 2-3 As shown, to improve the support stability of the work platform 2, a pair of second movable shafts 33 parallel to the pin shaft 3113 are arranged side by side between the two cross rod groups 31. The two ends of one second movable shaft 33 are bolted to the first connecting rod 3111 of another pair of cross rods 311 at the same horizontal position, and the two ends of the other second movable shaft 33 are bolted to the second connecting rod 3112 of the same pair of cross rods 311. The two second movable shafts 33 are symmetrically arranged about the pin shaft 3113. A second hydraulic cylinder 8 is provided on the opposite outer side of each of the two second movable shafts 33. The tail ends of the two hydraulic cylinders 8 are rotatably connected to the two second movable shafts 33. The output ends of the two second hydraulic cylinders 8 are rotatably connected to the lower surface of the working platform 2, and the output ends of the two second hydraulic cylinders 8 are respectively set on opposite sides of the scissor mechanism 3. That is, the connection points of the output ends of the two second hydraulic cylinders 8 and the working platform 2 are as close as possible to one opposite side of the working platform 2, while the connection points of the two cross rod groups 31 and the working platform 2 are as close as possible to the other opposite side of the working platform 2, thereby improving the support stability of the working platform 2. The connection points of the two second hydraulic cylinders 8 and the working platform 2 are symmetrically arranged about the pin shaft 3113. During the lifting and lowering of the working platform 2 by the scissor mechanism 3, the output ends of the second hydraulic cylinders 8 extend and retract synchronously, thereby improving the support stability of the working platform 2 and further reducing the sway rate of the working platform 2.

[0037] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A hydraulic lifting safety platform device for high-altitude operations, characterized in that, It includes a horizontally set base (1), a working platform (2) set above the base (1), and a scissor mechanism (3) set between the base (1) and the working platform (2); The scissor mechanism (3) is provided with a pair of first hydraulic cylinders (4) on both sides; the tail ends of the two pairs of first hydraulic cylinders (4) are rotatably connected to the upper surface of the base (1), and the output ends of the two pairs of first hydraulic cylinders (4) are rotatably connected to the scissor mechanism (3); the top and bottom of the scissor mechanism (3) are slidably connected to the working platform (2) and the base (1) respectively; the bottom of the scissor mechanism (3) is connected to a positioning mechanism (5).

2. The high-altitude operation hydraulic lifting safety platform device as described in claim 1, characterized in that, The scissor mechanism (3) includes a pair of crossbar groups (31) arranged side by side; each of the two crossbar groups (31) includes multiple crossbars (311) arranged side by side from top to bottom; each of the multiple crossbars (311) includes a first link (3111) and a second link (3112) arranged in an X-shape; the first link (3111) and the second link (3112) are connected by a pin (3113), and the pin (3113) is rotatably engaged with the first link (3111) and the second link (3112) respectively; the end of the first link (3111) of one crossbar (311) is rotatably connected to the end of the second link (3112) of the adjacent crossbar (311).

3. The high-altitude operation hydraulic lifting safety platform device as described in claim 2, characterized in that, A pair of first movable shafts (32) parallel to the pin (3113) are arranged side by side between the two cross rod groups (31); the two ends of one of the first movable shafts (32) are respectively fixed to the first connecting rod (3111) of a pair of cross rods (311) at the same horizontal position, and the two ends of the other first movable shaft (32) are respectively fixed to the second connecting rod (3112) of the pair of cross rods (311); the output ends of the two pairs of first hydraulic cylinders (4) are respectively rotatably connected to the two first movable shafts (32), and the two pairs of first hydraulic cylinders (4) are respectively arranged on the opposite outer side of the two first movable shafts (32).

4. The high-altitude operation hydraulic lifting safety platform device as described in claim 2, characterized in that, The bottoms of both cross rod assemblies (31) are connected to the upper surface of the base (1) via a first guide mechanism (6); the first guide mechanism (6) includes a support strip (61) horizontally fixed to the upper surface of the base (1); the opposite sides of the support strip (61) are each horizontally fixed with a limiting strip (62) parallel to it; the opposite sides of the two limiting strips (62) are each provided with a guide groove (63); a pair of sliders (64) are arranged side by side between the two limiting strips (62); the two sliders (64) are respectively rotatably connected to the lower end of the first connecting rod (3111) and the lower end of the second connecting rod (3112) of the bottom cross rod (311); a pair of rollers (65) are rotatably connected side by side on one opposite side of the two sliders (64); the two pairs of rollers (65) on any one slider (64) are respectively rolled and engaged in the two guide grooves (63).

5. The high-altitude operation hydraulic lifting safety platform device as described in claim 4, characterized in that, The lower surface of the slider (64) is provided with a receiving groove (66), and the receiving groove (66) penetrates through the other opposite side of the slider (64); the positioning mechanism (5) includes a bearing strip (51) fixed parallel to the upper surface of the support strip (61) and a first electromagnet (52) fixedly embedded in the upper surface of the slider (64); the upper surface of the bearing strip (51) is provided with a plurality of slots (53) arranged side by side along the length direction; a push-pull column (54) is vertically arranged on one side of the first electromagnet (52); the push-pull column (54) slides... The push-pull column (54) is inserted into the slider (64); the lower end of the push-pull column (54) extends into the receiving groove (66) and is fixed with a conical block (55) that matches the slot (53); the upper end of the push-pull column (54) is horizontally fixed with a movable piece (56); the lower surface of the movable piece (56) is connected to the upper surface of the slider (64) by a tension spring (57); the lower surface of the movable piece (56) is horizontally fixed with an iron piece (58) corresponding to the first electromagnet (52); the iron piece (58) can be attracted by the first electromagnet (52).

6. The high-altitude operation hydraulic lifting safety platform device as described in claim 2, characterized in that, The tops of the two crossbar assemblies (31) are connected to the lower surface of the work platform (2) via a second guide mechanism (7); the second guide mechanism (7) includes a guide rail (71) horizontally fixed to the lower surface of the work platform (2); a pair of transmission blocks (72) are arranged side by side below the guide rail (71); the tops of the two transmission blocks (72) each have a sliding part (721); the two sliding parts (721) are slidably connected to the guide rail (71); the two transmission blocks (72) are respectively rotatably connected to the upper end of the first connecting rod (3111) and the upper end of the second connecting rod (3112) of the topmost crossbar (311).

7. The high-altitude operation hydraulic lifting safety platform device as described in claim 6, characterized in that, One side of the guide rail (71) is equipped with an anti-deviation component (73) connected to the two transmission blocks (72); the two transmission blocks (72) each have a pair of protrusions (722) arranged side by side on their opposite outer surfaces; the anti-deviation component (73) includes a first rack (731) horizontally fixed to the lower surface of the work platform (2) and a pair of rotating shafts (732) respectively rotatably connected to the two pairs of protrusions (722); the first rack (731) is arranged parallel to the guide rail (71); the two rotating shafts (732) are both arranged horizontally, and the two rotating shafts (732) are both arranged perpendicular to the rack (731); a rocker arm (733) is fixed to one end of each of the two rotating shafts (732); a one-way gear (734) is connected to both ends of each of the two rocker arms (733); any one-way gear (734) can mesh with the rack (731).

8. The high-altitude operation hydraulic lifting safety platform device as described in claim 7, characterized in that, A rotary drive assembly (74) is connected to the rotating shaft (732); the rotary drive assembly (74) includes a second electromagnet (741) fixedly embedded in one side of the transmission block (72) and a transmission gear (742) fixedly sleeved on the rotating shaft (732); the second electromagnet (741) is disposed between two protrusions (722); an adjusting block (743) is disposed between the second electromagnet (741) and the transmission gear (742); the adjusting block (743) is slidably connected to the opposite inner surfaces of the two protrusions (722); the side of the adjusting block (743) near the second electromagnet (741) is fixed. A magnetic sheet (744) corresponding to the second electromagnet (741) is attached; when the magnetic properties of the magnetic sheet (744) and the inner surfaces of the second electromagnet (741) are different, the magnetic sheet (744) is attracted by the second electromagnet (741); when the magnetic properties of the magnetic sheet (744) and the inner surfaces of the second electromagnet (741) are the same, the magnetic sheet (744) is repelled by the second electromagnet (741); a second rack (745) parallel to the first rack (731) is horizontally fixed at the lower edge of the adjusting block (743); the second rack (745) meshes with the transmission gear (742).

9. The high-altitude operation hydraulic lifting safety platform device as described in claim 8, characterized in that, A limiting block (746) is provided between the transmission gear (742) and the adjusting block (743); the limiting block (746) is fixed on one side of any protrusion (722); when the magnetic properties of the magnetic sheet (744) and the inner side of the second electromagnet (741) are the same, the side of the adjusting block (743) close to the transmission gear (742) is in contact with the side of the limiting block (746) away from the transmission gear (742).

10. The high-altitude operation hydraulic lifting safety platform device as described in claim 2, characterized in that, A pair of second movable shafts (33) parallel to the pin (3113) are arranged side by side between the two cross rod groups (31); the two ends of one second movable shaft (33) are respectively fixed to the first connecting rod (3111) of another pair of cross rods (311) at the same horizontal position, and the two ends of the other second movable shaft (33) are respectively fixed to the second connecting rod (3112) of the pair of cross rods (311); a second hydraulic cylinder (8) is provided on the opposite outer side of the two second movable shafts (33); the tail ends of the two second hydraulic cylinders (8) are respectively rotatably connected to the two second movable shafts (33); the output ends of the two second hydraulic cylinders (8) are rotatably connected to the lower surface of the working platform (2).

Images