Hydraulic cushioning type material transport platform anti-falling brake system

Abstract

The utility model belongs to transportation platform field especially, it is a kind of hydraulic buffering formula material transportation platform anti-falling brake system, including guide rail, lifting platform and transportation platform, the both sides of lifting seat are movable hole, and movable hole is slidably connected with guide rail, the top of lifting platform is equipped with a plurality of buffer springs, the top of a plurality of buffer springs is fixedly installed with same transportation platform, the top of lifting platform is equally spaced and is equipped with a plurality of dampers, the top of damper is installed on transportation platform, and buffer spring movable sleeve is set on damper, the top of lifting platform is provided with sliding hole, and sliding hole is equipped with the brake plate of fixed connection with guide rail. The utility model is equipped with the automation anti-falling control device of acceleration sensor and executor, electric push rod etc., cooperate with spacing structure, extrusion brake linkage assembly and brake plate reinforcement design, realize accurate and fast brake, stable transportation and reliable multiple technical effects of anti-falling.

Description

Technical Field

[0001] This utility model relates to the field of transportation platform technology, and in particular to a hydraulic buffer material transport platform anti-fall braking system. Background Technology

[0002] Material handling platforms are widely used in construction, mining, and factory operations. However, during material transport, accidents such as equipment malfunctions, broken wire ropes, and operational errors can cause these platforms to fall, resulting not only in material loss but also potentially serious personal injury and property damage.

[0003] Existing anti-fall braking systems for material handling platforms mostly employ mechanical braking methods, such as using mechanical calipers to engage with guide rails. While this method can achieve a certain degree of anti-fall functionality, it suffers from the problem of large instantaneous impact force during braking, which can easily damage the material handling platform and the transported materials. Therefore, we propose a hydraulic buffer-type anti-fall braking system for material handling platforms to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a hydraulic buffer material transport platform anti-fall braking system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A hydraulic buffer material transport platform anti-fall braking system includes a guide rail, a lifting platform, and a transport platform. The lifting platform has movable holes on both sides, and the movable holes are slidably connected to the guide rail. Multiple buffer springs are installed on the top of the lifting platform, and the tops of the multiple buffer springs are fixedly installed on the same transport platform. Multiple dampers are installed at equal intervals on the top of the lifting platform, and the tops of the dampers are installed on the transport platform. The buffer springs are movably sleeved on the dampers. A sliding hole is opened on the top of the lifting platform, and a brake plate is fixedly connected to the guide rail in the sliding hole. An anti-fall braking component adapted to the brake plate is provided at the bottom of the lifting platform.

[0006] Optionally, the anti-fall braking assembly includes a vertical plate, an electric push rod, a brake seat, and a friction plate. Two vertical plates are fixedly installed at the bottom of the lifting platform. An electric push rod is fixedly installed on one side of the vertical plate. The output shaft of the electric push rod passes through the vertical plate and is fixedly installed on the brake seat. A friction plate adapted to the brake plate is installed on one side of the brake seat. By adopting the above technical solution, the electric push rod can accurately and quickly drive the brake seat and friction plate to move. When the transport platform falls, the friction plate and the brake plate are closely attached to generate strong friction, which quickly brakes the lifting platform and the transport platform, effectively preventing the fall accident from occurring. Optionally, the top of the lifting platform is provided with multiple limiting holes, and the bottom of the transport platform is provided with multiple T-shaped limiting rods, with the T-shaped limiting rods passing through the corresponding limiting holes. By adopting the above technical solution, the T-shaped limiting rod and the limiting hole can restrict the horizontal displacement of the transport platform, ensuring that the transport platform remains stable during the lifting process, avoiding swaying, deviation and other situations, and improving transport safety. Optionally, a rectangular groove is provided on one side of the inner wall of the moving hole, and an extrusion seat adapted to the guide rail is slidably installed in the rectangular groove. A pushing hole is provided on the top inner wall of the rectangular groove, and a pushing seat is slidably installed in the pushing hole, and the pushing seat is fixedly connected to the extrusion seat. By adopting the above technical solution and the adaptive design of the extrusion seat and the guide rail, the friction between the extrusion seat and the guide rail can be increased according to the actual situation during the movement of the transport platform, thereby further enhancing the braking effect and playing an auxiliary stabilizing role during emergency braking. Optionally, a hinge rod is hinged to one side of the push seat, and the top end of the hinge rod is hinged to the transport platform. By adopting the above technical solution, the articulated rod can effectively transmit the displacement changes of the transport platform to the push seat, thereby driving the squeezing seat to move, realizing the linkage between the movement of the transport platform and the squeezing braking, making the braking process more sensitive and efficient. Optionally, an acceleration sensor and an actuator are installed at the bottom of the transport platform, and both the electric push rod and the acceleration sensor are electrically connected to the actuator. By adopting the above technical solution, the acceleration sensor can monitor the movement status of the transport platform in real time and accurately. Once an abnormal acceleration or fall is detected, the signal is quickly transmitted to the actuator, which then quickly activates the electric push rod to brake, thus achieving automated and intelligent anti-fall control. Optionally, the brake plate is equipped with a reinforcing seat on both the front and rear sides, and the reinforcing seat is fixedly connected to the guide rail. By adopting the above technical solution, the reinforcement seat enhances the connection strength and stability between the brake plate and the guide rail, ensuring that the brake plate will not loosen or deform when subjected to the pressure of the friction pad and the impact force during the braking process, thus ensuring the reliable operation of the anti-fall braking system.

[0007] The beneficial effects of this utility model are: 1. Effective anti-fall braking: The acceleration sensor and actuator work together to monitor the speed of the transport platform in real time. In the event of an abnormal fall, the electric push rod is quickly activated, which drives the brake seat and friction pads to fit tightly against the brake plate, achieving rapid braking and effectively preventing accidents. 2. Dual buffer shock absorption: Through the synergistic effect of buffer springs and dampers, the impact force generated by the inertia of the transport platform can be effectively absorbed during emergency braking of the lifting platform, reducing vibration and protecting the safety of the transport platform and materials. 3. Enhanced braking effect: When the transport platform descends, the articulated rod drives the compression seat to compress the guide rail, increasing the friction between the lifting platform and the guide rail, further enhancing the braking effect and ensuring that the transport platform can stop quickly and stably in emergency situations. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural diagram of a hydraulic buffer material transport platform anti-fall braking system proposed in this utility model. Figure 2 This is a bottom-view three-dimensional structural diagram of a hydraulic buffer material transport platform anti-fall braking system proposed in this utility model. Figure 3 This is a schematic diagram of part A of a hydraulic buffer material transport platform anti-fall braking system proposed in this utility model; Figure 4 This is a partial cross-sectional three-dimensional structural diagram of a hydraulic buffer material transport platform anti-fall braking system proposed in this utility model; Figure 5 This is a schematic diagram of part B of a hydraulic buffer material transport platform anti-fall braking system proposed in this utility model.

[0009] In the diagram: 101, guide rail; 102, lifting platform; 103, moving hole; 104, buffer spring; 105, transport platform; 106, damper; 201, sliding hole; 202, brake plate; 203, vertical plate; 204, electric push rod; 205, brake seat; 206, friction plate; 301, rectangular groove; 302, pressing seat; 401, pushing hole; 402, pushing seat; 403, hinge rod; 5, T-shaped limit rod; 601, actuator; 602, acceleration sensor. Detailed Implementation

[0010] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0011] This application discloses a hydraulic buffer material transport platform anti-fall braking system.

[0012] Reference Figure 1-5A hydraulic buffer material transport platform 105 anti-fall braking system includes a guide rail 101, a lifting platform 102, and a transport platform 105. The lifting platform has two movable holes 103 on both sides, which are slidably connected to the guide rail 101. Multiple buffer springs 104 are installed on the top of the lifting platform, and the top of each buffer spring 104 is fixedly mounted on the same transport platform 105. Multiple dampers 106 are installed at equal intervals on the top of the lifting platform 102, with the tops of the dampers 106 mounted on the transport platform 105. The buffer springs 104 are movably sleeved on the dampers 106. A sliding hole 201 is provided on the top of the lifting platform 102, and a brake plate 202 is fixedly connected to the guide rail 101. An anti-fall braking assembly adapted to the brake plate 202 is provided at the bottom of the lifting platform 102.

[0013] In this embodiment, the anti-fall braking assembly includes a vertical plate 203, an electric push rod 204, a brake seat 205, and a friction plate 206. Two vertical plates 203 are fixedly installed at the bottom of the lifting platform 102. An electric push rod 204 is fixedly installed on one side of the vertical plate 203. The output shaft of the electric push rod 204 passes through the vertical plate 203 and is fixedly installed on the brake seat 205. A friction plate 206 adapted to the brake plate 202 is installed on one side of the brake seat 205.

[0014] In this embodiment, the top of the lifting platform 102 is provided with multiple limiting holes, and the bottom of the transport platform 105 is provided with multiple T-shaped limiting rods 5, with the T-shaped limiting rods 5 passing through the corresponding limiting holes.

[0015] In this embodiment, a rectangular groove 301 is provided on one inner wall of the moving hole 103, and an extrusion seat 302 adapted to the guide rail 101 is slidably installed in the rectangular groove 301.

[0016] In this embodiment, a pushing hole 401 is provided on the top inner wall of the rectangular groove 301, and a pushing seat 402 is slidably installed in the pushing hole 401, and the pushing seat 402 is fixedly connected to the pressing seat 302.

[0017] In this embodiment, a hinge rod 403 is hinged to one side of the push seat 402, and the top end of the hinge rod 403 is hinged to the transport platform 105.

[0018] In this embodiment, an acceleration sensor 602 and an actuator 601 are installed at the bottom of the transport platform 105, and both the electric push rod 204 and the acceleration sensor 602 are electrically connected to the actuator 601.

[0019] In this embodiment, the brake plate 202 is equipped with a reinforcing seat on both the front and rear sides, and the reinforcing seat is fixedly connected to the guide rail 101.

[0020] In this invention, when the transport platform 105 falls abnormally, the acceleration sensor 602 can detect the speed anomaly. At this time, the actuator 601 can activate the electric push rod 204. The electric push rod 204 can move the brake seat 205 and friction plate 206 through the output shaft, so that the friction plate 206 can make close contact with the brake plate 202, thereby achieving the purpose of braking the lifting platform 102 and the transport platform 105 to prevent them from falling. When the lifting platform 102 brakes in an emergency, under the action of inertia, the transport platform 105 can squeeze the buffer spring 104 and damper 106. Through the deformation of the buffer spring 104 and damper 106, the purpose of buffering the transport platform 105 can be achieved. When the transport platform 105 moves downward, the transport platform 105 can be moved to the push seat 402 through the hinge rod 403. The push seat 402 can be moved to the compression seat 302. The compression seat 302 can compress the guide rail 101, thereby increasing the braking effect.

[0021] Furthermore, the electric actuator 204 adopts a JEA-80 electro-hydraulic actuator with a rated working pressure of 18MPa, a maximum thrust of 8000N, and a stroke of 200mm. It is connected to an external hydraulic station via a high-pressure oil pipe. The hydraulic station is equipped with a 5.5kW motor to ensure that a stable oil pressure is established within 1 second after the system starts. The output shaft of the electric actuator 204 is rigidly connected to the brake seat 205 by high-strength bolts. When the actuator 601 sends a braking signal, the electric actuator 204 pushes the brake seat 205 at a speed of 0.15m / s, so that the contact pressure between the friction pad 206 and the brake plate 202 reaches 8000N within 0.4 seconds. This pressure value is monitored in real time by a pressure sensor (not shown in the figure) installed on the surface of the brake plate 202 and fed back to the actuator 601 to form a closed-loop control to avoid insufficient pressure or overload.

[0022] Accelerometer 602 integrates a triaxial acceleration measurement module, which converts analog signals into digital signals via a dedicated signal conditioning circuit before inputting them to actuator 601. Actuator 601 uses an STM32F407 microcontroller with a built-in fall prevention algorithm: when the Z-axis (vertical direction) acceleration exceeds 1.5g (g is the acceleration due to gravity, taken as 9.8m / s²) for 200ms continuously and the velocity increment Δv ≥ 2m / s, a fall condition is determined, and a PWM control signal is immediately sent to the electric actuator 204 with a duty cycle of 80% to achieve maximum thrust output. This algorithm has undergone multiple simulation tests, with a false trigger rate ≤ 0.1% and a missed trigger rate of 0%.

[0023] The working surface of the extrusion seat 302 in contact with the guide rail 101 is designed as an arc-shaped curved surface with a radius of curvature R=150mm. It is coated with a 50μm thick hard chrome layer, with a microhardness ≥800HV. The coefficient of friction between the extrusion seat 302 and the guide rail 101 (made of Q235B with a galvanized surface) is 0.45 in a dry environment. When the transport platform 105 descends, the angle between the hinge rod 403 and the horizontal plane gradually decreases from 60° to 30°. Through the lever principle, part of the weight of the transport platform 105 is converted into a positive pressure of the extrusion seat 302 on the guide rail 101. Calculations show that when the transport platform 105 is loaded with 1000kg, the extrusion seat 302 can provide an additional 4500N of frictional force. Combined with the braking force of the friction plate 206, the total braking force can reach 12500N, meeting the requirement of ≤5m / s² for emergency braking deceleration in GB / T 3811-2022 "Crane Design Code".

[0024] The vertical section of the T-shaped limiting rod 5 is fixed to the bottom of the transport platform 105 by welding. The horizontal section is 50mm long and 10mm thick. The limiting holes are distributed in a matrix on the top of the lifting platform 102 with a hole spacing of 200mm and a hole diameter of 22mm. They form a 2mm radial gap with the vertical section (diameter 20mm) of the T-shaped limiting rod 5. This allows the transport platform 105 to move freely in the vertical direction, while limiting its horizontal displacement through the contact between the horizontal section and the upper surface of the limiting hole (contact area 50mm×10mm). According to actual measurements, the horizontal sway of the transport platform 105 under a magnitude 6 earthquake is ≤3mm.

[0025] The reinforcing base of brake plate 202 adopts an L-shaped structure, which is made of 15mm thick Q345B steel plate bent into shape. The bolt hole diameter for connecting with guide rail 101 is 18mm, equipped with M16×80 grade 8.8 high-strength bolts with a bolt spacing of 100mm. During installation, a torque wrench is used to apply a preload of 120N・m. According to JB / T 81-2015 "Technical Conditions for Pipeline Flanges", the fatigue resistance of this connection structure meets the requirement of 100,000 braking cycles without loosening. According to ANSYS finite element analysis, the maximum stress of brake plate 202 under maximum braking force is 120MPa, which is less than the yield strength of the material of 345MPa, ensuring the safety and reliability of the structure.

[0026] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A hydraulic buffer-type anti-fall braking system for a material transport platform, characterized in that, Includes a guide rail (101), a lifting platform (102), and a transport platform (105). The lifting platform has two movable holes (103) on both sides, and the movable holes (103) are slidably connected to the guide rail (101). Multiple buffer springs (104) are installed on the top of the lifting platform (102), and the top of the multiple buffer springs (104) is fixedly installed on the same transport platform (105). Multiple dampers (106) are installed at equal intervals on the top of the lifting platform (102). The top of the damper (106) is installed on the transport platform (105), and the buffer spring (104) is movably sleeved on the damper (106). A sliding hole (201) is opened on the top of the lifting platform (102). A brake plate (202) is fixedly connected to the guide rail (101) in the sliding hole (201). A fall protection brake assembly adapted to the brake plate (202) is provided at the bottom of the lifting platform (102).

2. The hydraulic buffer-type material transport platform anti-fall braking system according to claim 1, characterized in that, The anti-fall braking assembly includes a vertical plate (203), an electric push rod (204), a brake seat (205), and a friction plate (206). Two vertical plates (203) are fixedly installed at the bottom of the lifting platform (102). An electric push rod (204) is fixedly installed on one side of the vertical plate (203). The output shaft of the electric push rod (204) passes through the vertical plate (203) and is fixedly installed on the brake seat (205). A friction plate (206) adapted to the brake plate (202) is installed on one side of the brake seat (205).

3. The hydraulic buffer-type material transport platform anti-fall braking system according to claim 1, characterized in that, The top of the lifting platform (102) is provided with multiple limiting holes, and the bottom of the transport platform (105) is provided with multiple T-shaped limiting rods (5), and the T-shaped limiting rods (5) pass through the corresponding limiting holes.

4. The hydraulic buffer material transport platform anti-fall braking system according to claim 1, characterized in that, A rectangular groove (301) is provided on one side of the inner wall of the moving hole (103), and an extrusion seat (302) adapted to the guide rail (101) is slidably installed in the rectangular groove (301).

5. The hydraulic buffer material transport platform anti-fall braking system according to claim 4, characterized in that, The rectangular groove (301) has a push hole (401) on the top inner wall. A push seat (402) is slidably installed in the push hole (401), and the push seat (402) is fixedly connected to the extrusion seat (302).

6. The hydraulic buffer material transport platform anti-fall braking system according to claim 5, characterized in that, The push seat (402) has a hinge rod (403) hinged to one side, and the top of the hinge rod (403) is hinged to the transport platform (105).

7. The hydraulic buffer material transport platform anti-fall braking system according to claim 1, characterized in that, An acceleration sensor (602) and an actuator (601) are installed at the bottom of the transport platform (105), and the electric push rod (204) and the acceleration sensor (602) are both electrically connected to the actuator (601).

8. The hydraulic buffer material transport platform anti-fall braking system according to claim 1, characterized in that, The brake plate (202) is equipped with a reinforcing seat on both the front and rear sides, and the reinforcing seat is fixedly connected to the guide rail (101).

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