A material hoist for civil engineering

Abstract

The present invention belongs to the technical field of civil engineering. Specifically, it relates to a material lift for civil engineering, which includes a mobile base and a scissor hydraulic lift. The mobile base is equipped with a scissor hydraulic lift, and a workbench is fixedly installed at the top of the scissor hydraulic lift. It also includes fixed seats, multi-stage push rods, and a falling prevention mechanism. Fixed seats are symmetrically and fixedly connected to the left and right side walls of the mobile base, and multi-stage push rods are fixedly installed at the tops of the fixed seats. The multi-stage push rods are located on both sides of the scissor hydraulic lift, and a falling prevention mechanism for preventing the sudden fall of the workbench is provided on the multi-stage push rods. Through the combination of a rotary encoder and a dual-axis motor, when the workbench is detected to fall abnormally, the present invention can respond quickly, control the reel to reverse and tighten the steel cable, and prevent the workbench from continuing to fall, thereby effectively preventing the sudden fall of the workbench and ensuring the safety of workers and goods.

Description

Technical Field

[0001] The present invention belongs to the technical field of civil engineering, and more specifically, relates to a material lift for civil engineering. Background Art

[0002] Vertical transportation of materials in the field of civil engineering is a core link affecting construction efficiency and safety. Especially in high-altitude operation scenarios, traditional manual handling or tower crane lifting methods are difficult to meet the precise transportation requirements of heavy materials such as precast concrete slabs and steel structures. A material lift for civil engineering is a core mechanical equipment used for vertical transportation of construction materials and equipment in modern construction projects. It is widely used in high-rise building construction, bridge construction, and large structure construction scenarios. With the increase in building height and construction complexity, such equipment plays an irreplaceable role in ensuring project progress and reducing operation risks, and has become a key infrastructure in the modern construction system.

[0003] Although current civil engineering lifts have become mature in terms of function realization, traditional equipment is divided into two categories: manned and unmanned, but they generally face systematic risks such as steel structure corrosion fatigue, foundation settlement offset, and wear of transmission components. There are still certain potential hazards in the long-term operation reliability. For traditional scissor lifts, the lifting is achieved by the synchronous movement of multiple hinge points. After long-term use, it is easy for the platform to tilt due to hinge shaft wear and uneven hydraulic cylinder thrust. Especially when the load is eccentric or the ground undulates beyond a certain angle, the unbalanced force on the scissor arms may cause structural deformation or even buckling instability. Therefore, we provide a material lift for civil engineering to improve the overall safety and reliability of the lift through structural optimization and intelligent monitoring technology. Summary of the Invention

[0004] To overcome the above-mentioned disadvantages of the prior art, the present invention provides a material lift for civil engineering.

[0005] Technical solution: A material lift for civil engineering, comprising a mobile base and a scissor-type hydraulic lift, the mobile base being the load-bearing carrier of the lift, the mobile base being equipped with a scissor-type hydraulic lift, the top of the scissor-type hydraulic lift being fixedly mounted with a workbench, the workbench being the carrier of the lift for carrying goods and staff; further comprising a fixed seat, a multi-stage push rod and an anti-fall mechanism, the left and right side walls of the mobile base being symmetrically fixedly connected with fixed seats, the top of the fixed seat being fixedly mounted with multi-stage push rods, the multi-stage push rods being located on both sides of the scissor-type hydraulic lift, the multi-stage push rods being provided with an anti-fall mechanism for preventing the workbench from falling suddenly; the anti-fall mechanism comprising a mounting frame fixedly mounted on a telescopic rod of the multi-stage push rod, the top of the mounting frame being symmetrically rotatably connected with two sets of rotating shafts, each set of the There are two rotating shafts, one group of which is fixedly connected with a fixed pulley 1 on the rotating shaft, and the other group of the rotating shafts is fixedly connected with a drum, and steel cables are wound on the drums. A double-axis motor is fixedly installed on the mounting frame, and the bidirectional output shafts of the double-axis motor are respectively connected to a group of rotating shafts where the drums are located. Brackets are symmetrically fixedly connected to the left and right side walls of the workbench, and fixed pulley 2 is rotatably installed on the brackets. The free ends of the steel cables wound on the drums successively pass through the corresponding fixed pulley 2 and fixed pulley 1 on the same side and are then connected to the brackets. Two rotary encoders are also installed on the mounting frame, and the shafts of the rotary encoders are respectively connected to the rotating shafts where the fixed pulley 1 on the same side is located. The rotary encoders have a built-in controller and are used to control the double-axis motor; the fixed seats on both sides are also provided with supporting mechanisms for supporting the elevator.

[0006] In addition, it is particularly preferred that a ladder is provided on the mobile base, and the ladder is convenient for the staff to climb up to the workbench on the ground. The workbench surface is fixedly equipped with a guardrail around the periphery, and a control module is provided on one side of the guardrail. The control module is used to control the entire elevator. When the elevator encounters a sudden risk situation, the staff on the workbench can also control the module in time to control the entire elevator.

[0007] In addition, it is particularly preferred that the supporting mechanism includes a connecting frame fixedly mounted on a fixing seat, two connecting frames are symmetrically fixed on the same fixing seat, a rotary damper is fixedly mounted on the connecting frame, a mounting shaft is fixedly connected between the rotors of the rotary dampers on both sides, a supporting plate is fixedly connected to the mounting shaft, a rubber pad is provided on the top plate of the supporting plate, and after the supporting plates on both sides of the movable base are stretched outward to the ground, the rubber pads are in contact with the ground to maintain stable support, limit frames are symmetrically provided on both sides of the outer shell of the multi-stage push rod, the limit frame is hollow inside and the side facing outward is open, the support plate can be rotatably stored in the limit frame corresponding to the same side, and a locking member is also provided on the fixing seat, and the locking member is used to lock the support plate after being stretched out or stored.

[0008] In addition, it is particularly preferred that the locking component consists of a fixing frame, an electric push rod and a clamping rod, the fixing seat is fixedly connected to the fixing frame, the fixing frame is provided with two and symmetrically distributed on both sides of the support plate on the same side, the fixing frames are fixedly installed with electric push rods, the telescopic rods of the electric push rods are fixedly connected to the clamping rod, chucks are fixedly installed on both sides of the shaft body of the mounting shaft, a plurality of clamping grooves for adapting to the clamping rods are circumferentially opened on the disk body of the chuck, and the clamping rods are clamped into the clamping grooves of the corresponding chucks on the same side.

[0009] In addition, it is particularly preferred that a connecting block is fixedly connected to one side of the telescopic rod of the multi-stage push rod, a connecting plate is fixedly provided at the plate body of the support plate close to the mounting axis, a spring is fixedly connected to the bottom of the connecting block, the spring passes through the limit frame and the rear end is bent and connected to the bottom of the connecting plate of the support plate, and the spring is used to pull the support plate to automatically expand outward.

[0010] In addition, it is particularly preferred that a reinforcement mechanism is provided on the side of the mobile base, and the reinforcement mechanism includes a fixed plate, a support claw and a hydraulic cylinder, the front and rear side walls of the mobile base are symmetrically fixedly connected with a fixed plate, the lower part of the fixed plate is hinged with a support claw, the upper part of the fixed plate is hinged with a hydraulic cylinder, the piston rod of the hydraulic cylinder and the support claw are hinged to each other, and after the support plates on the left and right sides of the mobile base are supported to the ground, the support claws are driven by the hydraulic cylinder to rotate and support on the ground.

[0011] In addition, it is particularly preferred that a contact block is embedded in the outer side of the plate body of the support plate, and a contact sensor is also embedded in the inner wall of the frame corresponding to the support plate of the limit frame, and the contact block is adapted to and used to trigger the contact sensor, and the contact sensor has a built-in controller and is used to control the hydraulic cylinder. When the support plate rotates outward from the limit frame to expand the support, the contact block on the support plate disengages from the contact sensor in the limit frame, and the contact sensor can synchronously control the operation of the hydraulic cylinder through the controller.

[0012] In addition, it is particularly preferred that tilt sensors are installed on both side walls of the workbench body, and the tilt sensors are used to monitor the horizontal state of the workbench. An electronic scale is fixedly installed inside the workbench body, and the electronic scale is located at the bottom of the workbench surface. The electronic scale is used to monitor whether the load on the workbench is overloaded. A buzzer is also provided on one side of the workbench, and the tilt sensor and the electronic scale are both equipped with a built-in controller to control the buzzer. Beneficial Effects

[0013] 1. The present invention combines a rotary encoder with a dual-axis motor. When an abnormal fall of the workbench is detected, the device can respond quickly and control the reel to reverse and tighten the steel cable to stop the workbench from falling further, thereby effectively preventing the workbench from falling suddenly and ensuring the safety of the staff and goods.

[0014] 2. The multi-stage push rod of the present invention is linked to the support plate through a spring, enabling the support mechanism to automatically unfold before the lifting operation, providing additional stable support, reducing manual intervention, and improving the overall structural stability of the lift.

[0015] 3. The present invention can also trigger the action of the hydraulic cylinder through the contact sensor, causing the support claws to automatically unfold and support the ground, forming a multi-point support structure, further enhancing the equipment stability, especially outstanding when operating on uneven or soft ground.

[0016] 4. The present invention uses an inclination sensor to monitor the horizontal state of the workbench in real time. If it tilts, it immediately triggers the buzzer to alarm, prompting the operator to stop the machine for inspection. At the same time, it monitors the load through an electronic scale and automatically alarms when overloaded, avoiding mechanical failures or structural damages caused by overloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2 It is a schematic diagram of the mobile base, scissor hydraulic lift, and workbench of the present invention.

[0019] Figure 3 It is a connection relationship diagram of the mobile base, fixed seat, multi-stage push rod, and other components of the present invention.

[0020] Figure 4 It is a schematic diagram of the cooperation relationship between the workbench, double-axis motor, drum, and steel cable of the present invention.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of the specific components of the anti-fall mechanism of the present invention.

[0022] Figure 6 It is a schematic diagram of the multi-stage push rod, support plate, limit frame, lock fastener, and other components of the present invention.

[0023] Figure 7 It is a schematic diagram of the support plate, limit frame, contact sensor, and contact block of the present invention.

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the mobile base, fixed plate, support claw, and hydraulic cylinder of the present invention.

[0025] Figure 9 It is a schematic diagram of the workbench, inclination sensor, electronic scale, and buzzer of the present invention.

[0026] In the figure: 1. Mobile base, 100. Ladder, 2. Scissor hydraulic lift, 3. Workbench, 31. Guardrail, 32. Control module, 4. Fixed seat, 5. Multistage push rod, 6. Anti-fall mechanism, 61. Mounting frame, 62. Rotating shaft, 63. Fixed pulley I, 64. Biaxial motor, 65. Reel, 651. Steel cable, 66. Bracket, 661. Fixed pulley II, 67. Rotary encoder, 7. Support mechanism, 71. Connecting frame, 72. Rotary damper, 73. Mounting shaft, 74. Support plate, 741. Rubber pad, 75. Limit frame, 8. Connecting block, 81. Spring, 82. Connecting plate, 9. Locking fastener, 91. Chuck, 92. Fixed frame, 93. Electric push rod, 94. Locking rod, 10. Reinforcement mechanism, 101. Fixed plate, 102. Support claw, 103. Hydraulic cylinder, 11. Contact block, 12. Contact sensor, 13. Tilt sensor, 14. Electronic scale, 15. Buzzer. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in combination with the detailed implementation manners and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present invention. In addition, in the following descriptions, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present invention.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] Embodiment 1: A material lift for civil engineering, such as Figures 1 - 5As shown in the figure, it includes a mobile base 1 and a scissor hydraulic lift 2. The mobile base 1 is the load-bearing carrier of this lift. The scissor hydraulic lift 2 is assembled on the mobile base 1. A workbench 3 is fixedly installed at the top of the scissor hydraulic lift 2. The workbench 3 is the carrier for this lift to carry goods and workers. It also includes a fixed seat 4, a multi-stage push rod 5 and a falling prevention mechanism 6. Fixed seats 4 are symmetrically and fixedly connected to the left and right side walls of the mobile base 1. Multi-stage push rods 5 are fixedly installed at the tops of the fixed seats 4. The multi-stage push rods 5 are located on both sides of the scissor hydraulic lift 2. A falling prevention mechanism 6 for preventing the sudden fall of the workbench 3 is arranged on the multi-stage push rods 5. The falling prevention mechanism 6 includes a mounting frame 61 fixedly installed on the telescopic rod of the multi-stage push rod 5. Two groups of rotating shafts 62 are symmetrically and rotatably connected to both sides of the top of the mounting frame 61. Each group of rotating shafts 62 has two. A first fixed pulley 63 is fixedly connected to one of the rotating shafts 62 in each group. A winding drum 65 is fixedly connected to the other rotating shaft 62 in each group. A steel cable 651 is wound around each winding drum 65. A dual-axis motor 64 is fixedly installed on the mounting frame 61. The bidirectional output shafts of the dual-axis motor 64 are respectively connected to the group of rotating shafts 62 where the winding drums 65 are located. Brackets 66 are symmetrically and fixedly connected to the left and right side walls of the workbench 3. A second fixed pulley 661 is rotatably assembled on each bracket 66. The free end of the steel cable 651 wound around the winding drum 65 sequentially passes around the corresponding second fixed pulley 661 and the first fixed pulley 63 on the same side and then is connected to the bracket 66. Two rotary encoders 67 are also assembled on the mounting frame 61. The shafts of the rotary encoders 67 are respectively connected to the rotating shafts 62 where the first fixed pulleys 63 on the same side are located. The rotary encoder 67 has a built-in controller and is used to control the dual-axis motor 64. A support mechanism 7 for supporting this lift is also arranged on the two fixed seats 4. During operation, the support mechanism 7 first supports on both sides of this lift. When the scissor hydraulic lift 2 drives the workbench 3 to lift, the multi-stage push rods 5 on both sides will drive the falling prevention mechanism 6 to lift synchronously with the workbench 3. When it reaches the working height, the multi-stage push rods 5 and the scissor hydraulic lift 2 are closed. When the scissor hydraulic lift 2 suddenly fails and causes the workbench 3 to fall, the falling workbench 3 pulls the steel cable 651 through the brackets 66 and the second fixed pulleys 661 on both sides. The pulled steel cable 651 drives the wound first fixed pulley 63 and the winding drum 65. At this time, the dual-axis motor 64 will rotate idly briefly. Subsequently, the rotary encoder 67 will detect the abnormal rotation of the connected rotating shaft 62. The rotary encoder 67 will immediately control the dual-axis motor 64 to respond through the built-in controller, so that the output shaft of the dual-axis motor 64 can timely control the winding drum 65 to reverse, so that the released steel cable 651 can be quickly tightened, so that the steel cable 651 can prevent the workbench 3 from continuing to fall. Subsequently, the dual-axis motor 64 can be controlled to slowly release the steel cable 651, so that the workbench 3 can safely descend to the ground, improving the safety during the use of the lift.

[0030] As Figure 1 and Figure 2As shown, a ladder 100 is provided on the mobile base 1, and the ladder 100 is convenient for the staff to climb up to the workbench 3 on the ground. The surface of the workbench 3 is fixedly equipped with a guardrail 31 in the circumference, and a control module 32 is provided on one side of the guardrail 31. The control module 32 is used to control the entire elevator. When the elevator encounters a sudden risk situation, the staff on the workbench 3 can also control the module 32 in time to control the entire elevator, thereby improving the risk resistance.

[0031] like Figure 3 , Figure 6 and Figure 7 As shown, the support mechanism 7 includes a connecting frame 71 fixedly mounted on the fixing seat 4, two connecting frames 71 are symmetrically fixed on the same fixing seat 4, and a rotary damper 72 is fixedly mounted on each connecting frame 71. A mounting shaft 73 is fixedly connected between the rotors of the rotary dampers 72 on both sides, and a supporting plate 74 is fixedly connected to the mounting shaft 73. A rubber pad 741 is arranged on the top plate of the supporting plate 74. After the supporting plates 74 on both sides of the mobile base 1 are spread outward to the ground, the rubber pads 741 are attached to the ground to keep the mobile base 1 stable. Fixed support, limit frames 75 are symmetrically arranged on both sides of the shell of the multi-stage push rod 5. The interior of the limit frame 75 is hollow and the side facing outward is open. The support plate 74 can be rotated and stored in the corresponding limit frame 75 on the same side. A locking member 9 is also provided on the fixed seat 4. The locking member 9 is used to lock the support plate 74 after it is stretched or stored, so that the support plate 74 can stably maintain a state of supporting the ground, thereby providing stable support for the entire elevator, and the support plate 74 can also be stably stored in the limit frame 75 without affecting the normal movement of the elevator.

[0032] like Figure 1 , Figure 6 and Figure 7 As shown, the locking member 9 consists of a fixing frame 92, an electric push rod 93 and a clamping rod 94. The fixing seat 4 is fixedly connected to the fixing frame 92. The fixing frame 92 is provided with two and symmetrically distributed on both sides of the support plate 74 on the same side. The fixing frame 92 is fixedly installed with an electric push rod 93. The telescopic rod of the electric push rod 93 is fixedly connected with a clamping rod 94. Chucks 91 are fixedly installed on both sides of the shaft body of the mounting shaft 73. A plurality of clamping grooves for adapting to the clamping rod 94 are opened circumferentially on the disk body of the chuck 91. The clamping rod 94 is clamped into the clamping groove of the corresponding chuck 91 on the same side. The electric push rod 93 drives the clamping rod 94 to disengage from the clamping groove of the chuck 91, so that the support plate 74 on the mounting shaft 73 can slowly rotate outward and unfold to the ground for support. After support, the electric push rod 93 drives the clamping rod 94 to clamp into the clamping groove of the chuck 91, so that the support plate 74 maintains a stable support state.

[0033] like Figure 6As shown in the figure, a connecting block 8 is fixedly connected to one side of the telescopic rod of the multi-stage push rod 5. A connecting plate 82 is fixedly provided at the plate body of the support plate 74 close to the mounting shaft 73. The bottom of the connecting block 8 is fixedly connected to a spring 81. After passing through the limit frame 75, the tail end of the spring 81 is bent and connected to the bottom of the connecting plate 82 of the support plate 74. The spring 81 is used to pull the support plate 74 to automatically expand outwards. The telescopic rod of the multi-stage push rod 5 extends and drives the connecting block 8 to stretch the spring 81. The stretched spring 81 can act on the connecting plate 82, so that the connecting plate 82 drives the support plate 74 to rotate outwards with the mounting shaft 73 as the rotation center and expand, so that while the multi-stage push rod 5 lifts the anti-falling mechanism 6, it can automatically drive the support plate 74 to support outwards, saving the workload of manually flipping the support plate 74 for support.

[0034] Before using this lift for civil engineering operations, first move the lift to the operation site by enabling the mobile base 1. When performing operations and when it is necessary to lift workers and materials together, the workers first carry the materials to be lifted onto the workbench 3, then climb up to the workbench 3 through the ladder 100. Subsequently, enable the electric push rod 93 through the control module 32 on the guardrail 31. The push rod of the electric push rod 93 retracts and drives the clamping rod 94 to disengage from the card slot of the chuck 91. Then, drive the workbench 3 to slowly lift by controlling the scissor hydraulic lift 2. While the scissor hydraulic lift 2 is lifting, the telescopic rod of the multi-stage push rod 5 will also start to extend, and push the anti-fall mechanism 6 at the top to lift synchronously with the scissor hydraulic lift 2. During the lifting process, the telescopic rod of the multi-stage push rod 5 pulls the spring 81 through the connecting block 8. The tensile force of the spring 81 drives the support plate 74 to slowly rotate and unfold outward from the two-sided limit frame 75 with the installation shaft 73 as the rotation center. At this time, the rotary damper 72 slows down the unfolding action of the support plate 74 through internal resistance to ensure that the support plate 74 can smoothly contact the ground and avoid equipment shaking or ground impact caused by rapid unfolding. When the support plate 74 is fully unfolded and fits with the ground, then enable the electric push rod 93 to reset and extend the push rod of the electric push rod 93, and drive the clamping rod 94 to insert into the corresponding card slot of the chuck 91 on the installation shaft 73, thereby locking the unfolded state of the support plate 74 and forming a stable lateral support on both sides of the mobile base 1 until the scissor hydraulic lift 2 continuously lifts the workbench 3 to the target operation height. At this time, the steel cable 651 in the anti-fall mechanism 6 is linked with the bracket 66 of the workbench 3 through the fixed pulley one 63 and the fixed pulley two 661. When the scissor hydraulic lift 2 suddenly fails and causes the workbench 3 to fall, the falling workbench 3 will pull the steel cable 651 through the bracket 66, forcing the rotary shaft 62 of the drum 65 and the fixed pulley one 63 to rotate rapidly. At this time, the rotary encoder 67 will monitor the rotation speed of the rotary shaft 62 in real time. Once the rotation speed is detected to be abnormal (such as exceeding the normal lifting or static state threshold), the rotary encoder 67 immediately reverses the two-axis motor 64 through the controller instruction. The two-axis motor 64 drives the drum 65 to rotate in the reverse direction and quickly tightens the steel cable 651, so that the steel cable 651 forms a reverse pulling force to offset the falling kinetic energy and suspend the workbench 3. Subsequently, the operator can control the two-axis motor 64 to slowly release the steel cable 651 through the control module 32, so that the workbench 3 can be smoothly lowered to the initial height near the ground at a safe speed to ensure the safety of personnel and goods, thereby improving the ability of the lift to cope with emergencies. And when only lifting and transporting materials for operations is required, the operator can also remove the control module 32 from the guardrail 31, thereby remotely controlling the lift to separately lift and feed the materials placed stably on the workbench 3 to improve the safety of transporting materials.

[0035] Embodiment 2: On the basis of Embodiment 1, as Figure 1 and Figure 8As shown, a reinforcement mechanism 10 is provided on the side of the mobile base 1, and the reinforcement mechanism 10 includes a fixed plate 101, a support claw 102 and a hydraulic cylinder 103. The front and rear side walls of the mobile base 1 are symmetrically fixedly connected with the fixed plate 101, the lower part of the fixed plate 101 is hinged with the support claw 102, and the upper part of the fixed plate 101 is hinged with the hydraulic cylinder 103. The piston rod of the hydraulic cylinder 103 and the support claw 102 are hinged with each other. After the support plates 74 on the left and right sides of the mobile base 1 are supported to the ground, the hydraulic cylinder 103 cooperates to drive the support claw 102 to rotate and support it on the ground, so that the front and rear sides of the mobile base 1 can also be effectively supported, thereby further reinforcing the stability of the entire lift.

[0036] like Figure 6 and Figure 7 As shown, a contact block 11 is embedded in the outer side of the support plate 74, and a contact sensor 12 is also embedded in the inner wall of the frame of the limit frame 75 corresponding to the support plate 74. The contact block 11 is adapted and used to trigger the contact sensor 12. The contact sensor 12 has a built-in controller and is used to control the hydraulic cylinder 103. When the support plate 74 rotates outward from the limit frame 75 to expand the support, the contact block 11 on the support plate 74 disengages from the contact sensor 12 in the limit frame 75. The contact sensor 12 can synchronously control the operation of the hydraulic cylinder 103 through the controller, so that the hydraulic cylinder 103 can automatically drive the support claw 102 to support it to the ground, thereby realizing the automatic support and reinforcement of the lift.

[0037] like Figure 1 and Figure 9 As shown, tilt sensors 13 are installed on both side walls of the workbench 3, and the tilt sensors 13 are used to monitor the horizontal state of the workbench 3. An electronic scale 14 is fixedly installed inside the workbench 3, and the electronic scale 14 is located at the bottom of the workbench 3. The electronic scale 14 is used to monitor whether the load on the workbench 3 is overloaded. A buzzer 15 is also provided on one side of the workbench 3. The tilt sensor 13 and the electronic scale 14 are both equipped with a controller for controlling the buzzer 15. When the workbench 3 is tilted or the load is overweight, the buzzer 15 can be controlled to alarm, reminding the staff that the workbench 3 is in an abnormal working state and needs to be stopped for inspection, thereby improving the service life and safety of the elevator.

[0038] During the process of the support mechanism 7 unfolding the support, when the contact block 11 on the outer side of the support plate 74 gradually separates from the contact sensor 12 on the inner wall of the limit frame 75 as the plate body rotates, the signal of the contact sensor 12 is interrupted and the controller is triggered to automatically start the hydraulic cylinder 103, so that the hydraulic cylinders 103 on the front and rear sides of the mobile base 1 start to work synchronously, and the piston rod of the hydraulic cylinder 103 pushes the support claw 102 to rotate downward around the hinge point, so that the tip of the support claw 102 is pressed into the ground to form a rigid support in the front and rear directions. This process is completed synchronously with the unfolding of the support plates 74 on both sides, thereby The azimuth support significantly improves the overall stability of the lift after lifting, and prevents the risk of overturning caused by center of gravity shift or external load during operation. When the lift is operating, the tilt sensor 13 and the electronic scale 14 inside the workbench 3 enter a real-time monitoring state. The tilt sensor 13 continuously detects the horizontal angle of the table. If the table tilt exceeds the safety threshold due to uneven load distribution or external force interference, the tilt sensor 13 will immediately activate the buzzer 15 through the built-in controller to sound an alarm, reminding the staff that the current workbench 3 is working abnormally and needs to be stopped for inspection, while the electronic scale 14 The load is dynamically measured by the pressure sensing module at the bottom of the table. Once the total weight of the goods or personnel exceeds the preset safety value, the electronic scale 14 also triggers the buzzer 15 to sound an alarm to remind the current workbench 3 to be overloaded. These two abnormal signals not only remind the operator to intervene urgently through the buzzer 15, but also can link the control module 32 to force the elevator to stop running to avoid the risk of expansion. When the elevator needs to move, the operator retracts the support mechanism 7 through the control module 32, that is, the telescopic rod of the multi-stage push rod 5 is contracted, and the spring 81 is relaxed accordingly, and the support plate 74 rotates in the resistance Under the buffering action of the nipper 72, it slowly rotates inward and is finally completely stored in the limit frame 75. At this time, the contact block 11 on the support plate 74 is pressed against the contact sensor 12 in the limit frame 75 again. After the sensor signal is restored, the hydraulic cylinder 103 is automatically controlled to retract the piston rod, driving the support claw 102 to lift off the ground and reset to the folded state, and then driving the clamping rod 94 to be clamped into the clamping slot of the chuck 91 again, ensuring that the support plate 74 is firmly fixed in the stored state. At the same time, the scissors-type hydraulic lift 2 and the multi-stage push rod 5 are reset to the initial height to facilitate the staff to operate the lift to move.

[0039] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. A material lift for civil engineering, comprising a mobile base (1) equipped with a scissor-type hydraulic lift (2), wherein a workbench (3) is fixedly provided on the scissor-type hydraulic lift (2); It is characterized in that, It also includes a fixed seat (4), the fixed seat (4) being fixedly connected to the left and right sides of the movable base (1), the fixed seat (4) being fixedly connected to a multi-stage push rod (5), and the multi-stage push rod (5) being provided with an anti-falling mechanism (6); The anti-fall mechanism (6) comprises: a mounting frame (61) fixedly mounted on the telescopic rod of the multi-stage push rod (5); two sets of rotating shafts (62) are symmetrically rotatably connected on both sides of the top of the mounting frame (61); each set of the rotating shafts (62) is provided with two, one set of the rotating shafts (62) is fixedly connected to a fixed pulley (63); the other set of the rotating shafts (62) is fixedly connected to a reel (65); a steel cable (651) is wound around the reel (65); a double-axis motor (64) is fixedly mounted on the mounting frame (61); the double-axis motor (64) has a bidirectional output shaft and a reel (65) ) is connected to the rotating shaft (62) where the workbench (3) is located, brackets (66) are symmetrically fixed on both sides of the workbench (3), and a second fixed pulley (661) is installed on the bracket (66). The free end of the steel cable (651) passes through the corresponding second fixed pulley (661) and the first fixed pulley (63) in sequence and is then connected to the bracket (66). The mounting frame (61) is equipped with two rotary encoders (67), and the shaft of the rotary encoder (67) is connected to the rotating shaft (62) where the corresponding first fixed pulley (63) is located. The rotary encoder (67) has a built-in controller and controls the dual-axis motor (64); The fixing seat (4) is also provided with a supporting mechanism (7) for supporting the lift; The support mechanism (7) comprises a connecting frame (71) fixedly mounted on a fixing seat (4), two connecting frames (71) are symmetrically fixedly mounted on the same fixing seat (4), a rotary damper (72) is fixedly mounted on each of the connecting frames (71), a mounting shaft (73) is fixedly connected between the rotors of the rotary dampers (72) on both sides, a supporting plate (74) is fixedly connected to the mounting shaft (73), a rubber pad (741) is arranged on the top plate of the supporting plate (74), limiting frames (75) are symmetrically arranged on both sides of the outer shell of the multi-stage push rod (5), the limiting frames (75) are hollow inside and one side facing outward is open, the supporting plate (74) can be rotatably stored in the corresponding limiting frame (75), and a locking member (9) is further provided on the fixing seat (4), the locking member (9) is used to lock the supporting plate (74) after being stretched or stored; The locking member (9) is composed of a fixing frame (92), an electric push rod (93) and a clamping rod (94); the fixing seat (4) is fixedly connected to the fixing frame (92); the fixing frame (92) is provided with two fixing frames (92) and symmetrically distributed on both sides of the support plate (74) on the same side; the fixing frame (92) is fixedly installed with an electric push rod (93); the telescopic rod of the electric push rod (93) is fixedly connected with the clamping rod (94); the chuck (91) is fixedly installed on both sides of the shaft body of the installation shaft (73); a plurality of clamping grooves adapted to the clamping rod (94) are circumferentially opened on the disc body of the chuck (91); the clamping rod (94) is clamped into the clamping groove of the corresponding chuck (91) on the same side; A connecting block (8) is fixedly connected to one side of the telescopic rod of the multi-stage push rod (5); a connecting plate (82) is fixedly provided on the plate body of the support plate (74) near the mounting shaft (73); a spring (81) is fixedly connected to the bottom of the connecting block (8); the spring (81) passes through the limit frame (75) and the rear end is bent and connected to the bottom of the connecting plate (82) of the support plate (74); the spring (81) is used to pull the support plate (74) to automatically expand outward.

2. The material lift for civil engineering according to claim 1, characterized in that, A ladder (100) is provided on the movable base (1); a guardrail (31) is fixedly mounted on the circumference of the tabletop of the workbench (3); a control module (32) is provided on one side of the guardrail (31); and the control module (32) is used to control the entire elevator.

3. The material lift for civil engineering according to claim 2, characterized in that, A reinforcement mechanism (10) is provided on the side of the mobile base (1), the reinforcement mechanism (10) comprising a fixing plate (101), a supporting claw (102) and a hydraulic cylinder (103); the front and rear side walls of the mobile base (1) are symmetrically fixed with the fixing plate (101); the lower part of the fixing plate (101) is hinged with the supporting claw (102); the upper part of the fixing plate (101) is hinged with the hydraulic cylinder (103); and the piston rod of the hydraulic cylinder (103) and the supporting claw (102) are hinged to each other.

4. The material lift for civil engineering according to claim 3, characterized in that, A contact block (11) is embedded in the outer side of the plate body of the support plate (74); a contact sensor (12) is also embedded in the inner wall of the frame of the limit frame (75) corresponding to the support plate (74); the contact block (11) is adapted to and used to trigger the contact sensor (12); the contact sensor (12) has a built-in controller and is used to control the hydraulic cylinder (103).

5. The material lift for civil engineering according to claim 4, characterized in that, Tilt sensors (13) are installed on both side walls of the workbench (3); an electronic scale (14) is fixedly installed inside the workbench (3); the electronic scale (14) is located at the bottom of the workbench (3); a buzzer (15) is also provided on one side of the workbench (3); and a controller for controlling the buzzer (15) is built into the tilt sensor (13) and the electronic scale (14).

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