Cargo deck synchronous anti-falling mechanism and method thereof

Abstract

The cargo platform synchronous anti-falling mechanism and method thereof described in the application belong to the field of intelligent logistics and storage. The brake wire linkage mechanism is proposed to enable the wedge-shaped block steel wire lifting point to release the brake wire linkage through the spring when the rope is broken, so as to achieve the purpose of active and synchronous clamping rail braking of the safety tongs on both sides of the cargo platform. The cargo platform synchronous anti-falling mechanism comprises a steel wire rope connected in a closed loop between the upper pulley and the speed limiter on the top and bottom of the stand column, and a group of speed limiter levers fixedly connected on the steel wire rope and vertically running with the steel wire rope, the side end of the speed limiter lever being fixedly connected to the cargo platform and synchronously lifting with the cargo platform; two groups of wedge-shaped block steel wire lifting points and safety tongs are symmetrically arranged on both sides of the cargo platform; a group of brake wire communication assemblies are arranged at the center of the cargo platform and connected with a group of speed limiter levers, two groups of wedge-shaped block steel wire lifting points and two groups of safety tongs through brake wires.

Description

Technical Field

[0001] This application belongs to the field of intelligent logistics warehousing, and specifically proposes a synchronous anti-fall mechanism and method for use on the loading platform of a double-column stacker crane. Background Technology

[0002] Currently, various types of lifting equipment are commonly used in automated warehousing operations. For example, stacker cranes use steel cables to pull the loading platform, transferring goods between different working heights. The loading platform's load-bearing components are typically made of steel cables or lifting chains. After prolonged use under heavy loads, there is a safety hazard of localized damage or even breakage of these components. In such cases, the loading platform would fall freely, potentially causing a serious accident and injuring personnel and other equipment in the work area. Therefore, it is usually necessary to design and install relevant fall protection mechanisms in advance to prevent accidental falls of the loading platform's load-bearing components.

[0003] Current stacker crane fall arrest systems generally consist of a speed limiter and safety clamps (calipers). For common double-column stacker cranes, there are usually two sets of safety clamps (calipers), installed on the two side arms of the loading platform. A linkage connects the lever system installed on the two side arms of the loading platform. When the loading platform exceeds the speed limit, the speed limiter activates, which pries one side lever, pulling up the safety clamp (caliper) lever and clamping it onto the guide rail to brake the loading platform. The levers on the two side arms of the loading platform are connected by a long linkage. When one side lever is pried, it simultaneously drives the lever installed on the other side arm, thereby achieving synchronous braking of the safety clamps (calipers) on both sides of the loading platform and preventing the loading platform from falling. Another common existing fall arrest mechanism adds a separate set of levers to the safety clamps on both sides of the loading platform, based on the speed limiter lever structure. The lifting point is designed as a structure composed of a wedge block joint and a screw spring. The connecting rod in the first structure is removed, and the brake cable directly connects the two safety clamps (calipers). At the same time, the speed limiter lever is not directly connected to the safety clamp, but is connected to the safety clamp lever through the brake cable. When the loading platform rope breaks, the spring is released, pushing the lever at one side of the safety clamp to move. In case of overspeed, the speed limiter lever is linked to the safety clamp lever through the brake cable. However, since the two safety clamps are directly connected by the brake cable, it can only partially, but not completely, ensure that the two safety clamps can synchronously clamp the guide rail, resulting in poor braking effect of the loading platform.

[0004] The reasons for this, and the shortcomings and deficiencies of existing technologies, are as follows: 1. The method of using a linkage speed limiter to trigger the safety brake alone has a delay in action. It can only be passively triggered by specific external conditions. That is, when the lifting wire rope of the loading platform breaks, the safety brake will only be triggered when the loading platform exceeds a certain speed, and cannot be triggered immediately. This delay in triggering poses a significant safety risk. 2. The loading platform linkage braking mechanisms of both technical routes are complex, and the linkage linkage mechanism is bulky, resulting in high processing and procurement costs, making it uneconomical. The first linkage linkage is particularly problematic. 3. The first method, which relies solely on the speed limiter to trigger the braking, has the risk of failing to trigger. The loading platform of a double-column stacker crane is usually lifted by two wire ropes pulling the two side arms of the loading platform respectively. If a single lifting wire rope breaks, the loading platform will tilt, and the falling speed will not be high enough to trigger the speed limiter, the safety brake will not work, and braking will not be achieved. 4. Both of the above-mentioned loading platform braking linkage mechanisms are relatively complex. The first type of linkage mechanism generally has a heavy weight, increasing the force required to trigger the safety clamp. The second type uses two lever linkages connected by brake cables consecutively, resulting in significant travel loss. It requires increased lever travel to meet the safety clamp triggering requirements, placing greater demands on the mechanism's operating space. 5. The second structure, which uses brake cables to link the two safety clamps of the loading platform, suffers from inconsistent lever travel due to the numerous bends in the cable's winding path within the loading platform. This inconsistency in the actual clamping travel of the two safety clamps leads to uneven braking force, causing the loading platform to tilt excessively upon stopping, still posing a risk of cargo falling.

[0005] In view of the above, this patent application is hereby filed. Summary of the Invention

[0006] The cargo platform synchronous anti-fall mechanism and method of the present invention aims to solve the problems existing in the prior art by proposing a new type of brake line linkage mechanism. It is intended to implement brake line linkage based on the wedge block steel wire rope lifting point being released by spring when the rope breaks, thereby achieving the purpose of active and synchronous clamping and braking of the guide rail by the safety clamps on both sides of the cargo platform.

[0007] To achieve the above design objectives, the cargo platform synchronous anti-fall mechanism includes a steel wire rope that is connected in a closed loop between the upper pulley and the speed limiter on the top and bottom of the column, and a set of speed limiter levers that are fixed to the steel wire rope and move vertically with the steel wire rope. The side end of the speed limiter lever is fixed to the cargo platform and moves up and down synchronously with the cargo platform.

[0008] Two sets of wedge-shaped steel wire rope lifting points and safety clamps are symmetrically arranged on both sides of the loading platform along the center. At the center of the loading platform, a set of brake line connecting components is set up, which are connected to a set of speed limiter levers, two sets of wedge-shaped steel wire rope lifting points and two sets of safety clamps respectively through brake lines.

[0009] The brake cable connection assembly has five sets of connectors, from the first brake cable connector to the fifth brake cable connector. The fixed end of each set of connectors is fixedly connected to a set of brake cable fixed connection shafts. The first brake cable connector and the second brake cable connector are each connected to a set of safety clamps through a set of brake cables. The third brake cable connector and the fourth brake cable connector are each connected to a set of wedge block wire rope lifting points through a set of brake cables. The fifth brake cable connector is connected to the speed limiter lever through a set of brake cables.

[0010] Furthermore, the brake cables connecting the first brake cable connector to the fifth brake cable connector are of the same length as those connecting the safety clamp, the wedge block wire rope lifting point, and the speed limiter lever.

[0011] Furthermore, the wedge-shaped wire rope lifting point includes a wedge-shaped lifting screw clamping plate and a brake line fixing plate fixed to the loading platform. The brake line fixing plate suspends and connects the brake line, and the end of the brake line is fixed to the wedge-shaped wire rope lifting plate. The wedge-shaped head connecting the wire rope is hinged to the lifting screw through a wedge-shaped block fixing pin. After the lifting screw passes through the wedge-shaped wire rope lifting plate, a nut is used to lock the shaft end of the lifting screw to the wedge-shaped wire rope lifting plate. A spring is sleeved on the lifting screw, and the spring is compressed and limited between the wedge-shaped lifting screw clamping plate and the wedge-shaped wire rope lifting plate. A fall protection detection element is provided on the wedge-shaped wire rope lifting plate, and the pressure head of the fall protection detection element is attached to the surface of the wedge-shaped wire rope lifting plate.

[0012] Furthermore, the speed limiter lever includes two sets of vertically connected wire rope connecting wedges to fix the free ends of the wire ropes respectively. Each of the two sets of wire rope connecting wedges is axially connected to the two ends of the wedge and the lever mounting block by a set of wedge assembly pins. The wedge and the lever mounting block are fixed to one end of the lever. The other end of the lever is axially mounted on the lever mounting seat and can rotate around the axis of the lever mounting seat. The lever mounting seat is fixed to one side of the loading platform. One end of the lever is suspended from the return spring. The other end of the return spring is fixed to the mounting plate by a spring fixing flat head bolt. The brake line is connected parallel to the return spring between the lever and the mounting plate. The mounting plate is fixed to one side of the loading platform.

[0013] Furthermore, the speed limiter includes a limiting mounting bracket connected to one side of the column, a counterweight block fixedly connected to the limiting bracket, and a speed limiting element with a fixed pulley and a brake assembly installed on the counterweight block; the steel wire rope wound around the speed limiting element is kept taut through the counterweight block.

[0014] Furthermore, the upper pulley includes a pulley mounting frame fixedly connected to one side of the column, a pulley rotation shaft for winding and connecting steel wire rope is provided on the pulley mounting frame, and an anti-slip rope protective cover is provided on the circumferential exterior of the pulley.

[0015] Based on the aforementioned cargo platform synchronous anti-fall mechanism, this application also proposes a novel stacker crane, which includes a cargo platform that is vertically and slidably connected between two sets of left and right columns, and the aforementioned cargo platform synchronous anti-fall mechanism is installed on the cargo platform.

[0016] Based on the aforementioned synchronous anti-fall mechanism for the loading platform, this application also proposes the following method for preventing the loading platform from falling:

[0017] Based on the connection of the brake line linkage component, two sets of wedge-shaped steel wire rope lifting points, safety clamps, and a set of speed limiter levers located on both sides of the loading platform implement synchronous linkage anti-fall control. When the loading platform is in an overspeed state, the speed limiter is triggered, the fixed pulley on it is braked, and the steel wire rope stops running. When the lever of the speed limiter is pulled, the tension is transmitted to the brake line linkage component through the brake line. The brake line linkage component transmits the tension synchronously to the two sets of safety clamps on both sides of the loading platform. The two sets of safety clamps clamp the guide rail synchronously, thereby realizing the braking and anti-fall control of the loading platform.

[0018] Furthermore, the wire rope is connected to the loading platform via a speed limiter lever. When the loading platform overspeeds, the linear velocity of the wire rope will also exceed the limit. The fixed pulley of the speed limiter element will be tightly pressed against the outside of the fixed pulley by the braking assembly of the speed limiter element to force it to stop rotating, thus braking the wire rope through friction. In the overspeed state, the speed limiter lever tilts upward, pulling the brake cable upward and transmitting the tension to the fifth brake cable of the brake cable connecting assembly. The brake cable fixing connecting shaft synchronously transmits the tension to the first brake cable connector and the second brake cable connector. Then, the first brake cable connector and the second brake cable connector are each connected to a set of safety clamps through another set of brake cables. The two sets of safety clamps located on both sides of the loading platform convert the movement of the first brake cable connector and the second brake cable connector caused by the above tension into the lifting stroke of the safety clamp lifting rod, thereby synchronously driving the two sets of safety clamps to simultaneously clamp the guide rails on the left and right columns, thus braking the loading platform.

[0019] Furthermore, when the steel wire rope on one or both sides of the loading platform breaks, the wedge block steel wire rope lifting point is triggered, the spring of the wedge block steel wire rope lifting point is released, and the spring generates a thrust that pushes away the wedge block steel wire rope lifting plate located below it. This thrust simultaneously drives the brake line to tighten and the anti-fall detection element to spring open. The anti-fall detection element outputs a fault signal to the control system. The wedge block steel wire rope lifting point transmits the above-mentioned thrust through the brake line to the two sets of safety clamps on both sides of the loading platform, and the two sets of safety clamps synchronously clamp the guide rail, thereby realizing the braking and anti-fall of the loading platform.

[0020] In summary, the synchronous anti-fall mechanism and method for the cargo platform described in this application have the following advantages:

[0021] 1. Based on the brake line connection component, this application can connect the speed limiter lever, the wedge block wire rope lifting points on both sides of the loading platform and the safety clamp together using the brake line. This allows any wedge block wire rope lifting point or any abnormality in the speed limiter to be triggered simultaneously by the brake line connection component, which can actively engage the safety clamps on both sides of the loading platform to brake the rail. This results in relatively high safety.

[0022] 2. This application connects the brake lines of each mechanism through a brake line connection component located in the middle of the loading platform. This means that the speed limiter lever and the wedge block wire rope lifting point are directly associated with the safety brakes through the brake lines. This reduces the travel loss of the brake lines during the routing process, and the travel triggered by any mechanism can be synchronously transmitted to the safety brakes on both sides of the loading platform with less loss, resulting in shorter braking impact time and higher accuracy.

[0023] 3. This application is based on the brake line connecting component being installed in the middle of the loading platform. Therefore, the brake lines connected to the mechanisms on both sides of the loading platform are of equal length, which can ensure that the lifting stroke error of the safety clamp levers on both sides of the loading platform is minimized. This results in the minimum time difference between the two safety clamps gripping the guide rail, higher synchronization, and effective prevention of tilting of the loading platform during braking, effectively reducing the phenomenon of goods falling off the loading platform due to braking.

[0024] 4. The anti-fall scheme for the loading platform proposed in this application is more comprehensive. When the loading platform exceeds its speed, the speed limiter is triggered, and the safety clamps on both sides work simultaneously, clamping the guide rail and braking the loading platform. If the lifting wire rope on either side of the loading platform breaks, the safety clamps are immediately and automatically triggered to clamp the guide rail and achieve braking. The braking measures in both abnormal situations are synchronized, and the guide rail is clamped simultaneously to achieve braking. Attached Figure Description

[0025] The present invention will now be further described with reference to the following figures.

[0026] Figure 1 This is a schematic diagram of a stacker crane using the synchronous anti-fall mechanism for the loading platform described in this application;

[0027] Figure 2 for Figure 1 A schematic diagram of the speed limiter anti-fall mechanism shown in section H;

[0028] Figure 3 This is a schematic diagram of a speed limiter;

[0029] Figure 4 This is a schematic diagram of a speed limiter lever;

[0030] Figure 5 This is a schematic diagram of the upper pulley;

[0031] Figure 6 This is a schematic diagram of the loading platform;

[0032] Figure 7 for Figure 6 A schematic diagram of the structure in direction A;

[0033] Figure 8 for Figure 6 A schematic diagram of the B-direction structure in the diagram;

[0034] Figure 9 for Figure 7 Schematic diagram of the lifting point of the wire rope in the middle wedge block;

[0035] Figure 10 For example Figure 9 Cross-sectional view of the structure shown;

[0036] Figure 11 This is a diagram of a safety clamp;

[0037] Figure 12 This is a schematic diagram of the brake cable routing;

[0038] Figure 13 This is a schematic diagram of the brake cable connection assembly;

[0039] Figure 14 For example Figure 7 A schematic diagram of the brake line in the view of the loading platform from direction A shown;

[0040] Figure 15 For example Figure 8 A schematic diagram of the brake line in the view of the loading platform from direction B;

[0041] In the above attached diagram, 1 is the upper pulley; 2 is the speed limiter lever; 3 is the speed limiter; and 4 is the wedge-shaped block wire rope lifting point.

[0042] 5. Rectangular tube for installing the wedge-shaped block wire rope lifting point; 6. Safety clamp; 7. Brake cable connecting assembly; 10. Wire rope;

[0043] 100. Stacker crane; 101. Anti-skid rope bracket; 102. Pulley mounting bracket; 103. Pulley;

[0044] 200. Loading platform; 201. Wire rope connecting wedge; 202. Wedge assembly pin; 203. Wedge and lever mounting block;

[0045] 205. Mounting plate; 206. Spring fixing flat head bolt; 207. Return spring; 208. Lever mounting base; 209. Lever;

[0046] 301. Speed ​​governor body; 302. Counterweight; 303. Speed ​​governor limit mounting bracket;

[0047] 401. Wedge head; 402. Brake cable fixing plate; 403. Wedge block fixing pin; 404. Lifting screw; 405. Wedge

[0048] 406. Block lifting screw clamp; 407. Fall protection detection element; 408. Brake cable; 409. Spring; 410. Wedge block wire rope lifting plate; 411. Lifting wire rope;

[0049] 601 is the safety clamp lifting rod;

[0050] 701. First brake cable connector; 702. Second brake cable connector; 703. Third brake cable connector; 704. ...

[0051] Four brake cable connectors; 705, fifth brake cable connector; 706, brake cable fixing and connecting shaft; Detailed Implementation

[0052] Example 1, such as Figures 1 to 15 As shown, in the double-column stacker 100 using the synchronous anti-fall mechanism of the loading platform described in this application, the loading platform 200 is vertically slidably connected between two sets of columns, and the synchronous anti-fall mechanism of the loading platform proposed in this application is provided on the loading platform 200.

[0053] The aforementioned cargo platform synchronous anti-fall mechanism includes a steel wire rope 10 that is connected in a closed loop between the upper pulley 1 and the speed limiter 3 on the top and bottom of the column, and a set of speed limiter levers 2 that are fixed to the steel wire rope 10 and move vertically together with the steel wire rope 10. The side end of the speed limiter lever 2 is fixed to the cargo platform 200 and moves up and down synchronously with the cargo platform 200.

[0054] Two sets of wedge-shaped steel wire rope lifting points 4 and safety clamps 6 are symmetrically arranged on both sides of the loading platform 200 along the center. At the center of the loading platform 200, a set of brake line connecting components 7 is arranged, which are connected to a set of speed limiter levers 2, two sets of wedge-shaped steel wire rope lifting points 4 and two sets of safety clamps respectively through brake lines.

[0055] When the loading platform 200 drives the speed limiter lever 2 to rise and fall, the wire rope 10 rises and falls along with the speed limiter lever 2, thereby enabling the speed limiter 3 and the fixed pulley on the upper pulley 1 to rotate. If the lifting speed of the loading platform 200 driving the wire rope 10 exceeds the set threshold of the speed limiter 3, the speed limiter 3 will be triggered by a safety protection mechanism to brake the fixed pulley on it to continue rotating, and the wire rope 10 will stop running. Finally, the speed limiter lever 2 will prevent the loading platform 200 from continuing to rise and fall.

[0056] The speed limiter 3 includes a limiting mounting bracket 303 connected to one side of the column, a counterweight 302 fixedly connected to the limiting bracket 303, and a speed limiting element 301 with a fixed pulley and a brake assembly installed on the counterweight 302. Through the counterweight 302, the steel wire rope 10 wound around the speed limiting element 301 can always be kept taut. The fixed pulley on the speed limiting element 301 is used to wind and connect the steel wire rope 10. When the linear speed of the steel wire rope 10 exceeds the set threshold, the brake assembly of the speed limiting element 301 will tightly fit against the outside of the fixed pulley to force it to stop rotating. The friction force brakes the operation of the steel wire rope 10, thereby preventing the loading platform 200 from continuing to rise and fall.

[0057] The speed limiter lever 2 includes two sets of vertically connected wire rope connecting wedges 201 to fix the free ends of the wire rope 10. The two sets of wire rope connecting wedges 201 are respectively axially connected to the two ends of the wedge and lever mounting block 203 by a set of wedge assembly pins 202. The wedge and lever mounting block 203 are fixedly connected to one end of the lever 209. The other end of the lever 209 is axially mounted on the lever mounting seat 208 and can rotate around the axis of the lever mounting seat 208. The lever mounting seat 208 is fixedly connected to one side of the loading platform 200.

[0058] The lever 209 is suspended from one end of the return spring 207, and the other end of the return spring 207 is fixed to the mounting plate 205 by the spring fixing flat head bolt 206. The brake line 407 is connected parallel to the return spring 207 between the lever 209 and the mounting plate 205. The mounting plate 205 is fixed to one side of the loading platform 200.

[0059] The speed limiter lever 2 is connected to the brake line connecting component 7 via a set of brake lines 407. At the same time, the brake line connecting component 7 is linked to two sets of wedge-shaped steel wire rope lifting points 4 and safety clamps 6 set on both sides of the loading platform.

[0060] The upper pulley 1 includes a pulley mounting bracket 102 fixedly connected to one side of the column, a pulley 103 with a steel wire rope 10 wound around it has a rotatable shaft provided on the pulley mounting bracket 102, and an anti-slip rope protective cover 101 is provided on the circumferential exterior of the pulley 103. The end of the anti-slip rope protective cover 101 is fixed to the pulley mounting bracket 102 to prevent the steel wire rope 10 from detaching from the pulley 103 during operation.

[0061] A set of wedge-shaped steel wire rope lifting points 4 are set on both sides of the loading platform 200 to connect the lifting steel wire rope 410 that drives the lifting and lowering of the loading platform 200.

[0062] The wedge-shaped steel wire rope lifting point 4 includes a wedge-shaped lifting screw clamping plate 405 fixedly connected to the wedge-shaped steel wire rope lifting point mounting rectangular tube 5, a brake line fixing plate 402 fixedly connected to the loading platform 200, a brake line fixing plate 402 suspending and connecting a brake line 407, and the end of the brake line 407 fixedly connected to the wedge-shaped steel wire rope lifting plate 409.

[0063] The wedge head 401 connected to the lifting wire rope 410 is hinged to the lifting screw 404 via the wedge block fixing pin 403. After the lifting screw 404 passes through the wedge block wire rope lifting plate 409, the shaft end of the lifting screw 404 is locked to the wedge block wire rope lifting plate 409 using a nut. A spring 408 is sleeved on the lifting screw 404. The spring 408 is compressed and limited between the wedge block lifting screw clamping plate 405 and the wedge block wire rope lifting plate 409. A fall protection detection element 406 is provided on the wedge block wire rope lifting plate 409.

[0064] During normal operation, the loading platform 200 is driven by the lifting wire rope 410 to move up and down repeatedly through the fixed connection between the lifting wire rope 410 and the wedge head 401. During this process, the wedge head 401, the lifting screw 404, and the wedge block wire rope lifting plate 409 are lifted together. The wedge block lifting screw clamping plate 405 is stationary relative to the loading platform. Due to the lifting force of the lifting wire rope 410, the spring 408 is compressed and restricted between the wedge block lifting screw clamping plate 405 and the wedge block wire rope lifting plate 409 and remains in a compressed state during the movement of the loading platform.

[0065] The safety clamp 6 has a safety clamp lifting rod 601 that connects to the brake cable connecting assembly 7;

[0066] The brake line connection assembly 7 includes a base plate 700, a first brake line connector 701, a second brake line connector 702, a third brake line connector 703, a fourth brake line connector 704, and a fifth brake line connector 705. Each set of connectors is connected to the base plate 700 through a set of screw and nut assemblies 707. The fixed end of each set of connectors is fixedly connected to the same set of brake line fixing and connecting shafts 706, which are axially mounted on the base plate 700.

[0067] The first brake cable connector 701 and the second brake cable connector 702 are each connected to the safety clamp lifting rod 601 of the safety clamp 6 via a set of brake cables 407. The third brake cable connector 703 and the fourth brake cable connector 704 are each connected to the wedge block wire rope lifting point 4 via a set of brake cables 407. The fifth brake cable connector 705 is connected to the speed limiter lever 2 via a set of brake cables 407.

[0068] A more preferred embodiment is that the brake lines 407 connecting the first brake line connector 701 to the fifth brake line connector 705 are of the same length as the brake lines 407 connecting the safety clamp 6, the wedge block wire rope lifting point 4, and the speed limiter lever 2, so as to more accurately and synchronously trigger the two sets of safety clamps 6 located on both sides of the loading platform 200 to simultaneously perform the anti-fall and rail-holding action.

[0069] Based on the aforementioned synchronous anti-fall mechanism for the loading platform, this application proposes the following method for preventing the loading platform from falling:

[0070] Based on the connection of the brake line connecting component 7, the two sets of wedge-shaped block steel wire rope lifting points 4, safety clamps 6, and a set of speed limiter levers 2 located on both sides of the loading platform 200 implement synchronous linkage anti-fall control.

[0071] When the loading platform 200 is in an overspeed state (i.e., the lifting speed of the wire rope 10 exceeds the set threshold of the speed limiter 3), the speed limiter 3 is triggered, the fixed pulley on it is braked, the wire rope 10 stops running, the lever 209 of the speed limiter lever 2 is pulled, and at the same time the tension is transmitted to the brake line connecting component 7 through the brake line 407. The brake line connecting component 7 transmits the tension synchronously to the two sets of safety clamps 6 on both sides of the loading platform 200. The two sets of safety clamps 6 clamp the guide rail synchronously, thereby achieving the braking and anti-fall of the loading platform 200.

[0072] Specifically, since the wire rope 10 is connected to the loading platform 200 through the speed limiter lever 2, when the loading platform 200 speeds up, the linear speed of the wire rope 10 will exceed the speed limit. The brake assembly of the speed limiter 301 is tightly attached to the outside of the fixed pulley to force it to stop rotating, and the operation of the wire rope 10 is braked by friction.

[0073] Since the steel wire rope 10 is connected to the speed limiter lever 2, the speed limiter lever 2 tilts upward in the overspeed state, which tightens the brake cable 407 and transmits the tension to the fifth brake cable 705 of the brake cable connecting assembly 7. The tension is then transmitted synchronously to the first brake cable connector 701 and the second brake cable connector 702 by the brake cable fixing connecting shaft 706. Then, the first brake cable connector 701 and the second brake cable connector 702 are each connected to a set of safety clamps 6 through another set of brake cables 407.

[0074] The two sets of safety clamps 6 located on both sides of the loading platform 200 convert the movement of the first brake cable connector 701 and the second brake cable connector 702 caused by the above-mentioned tension into the lifting stroke of the safety clamp lifting rod 601, thereby synchronously driving the two sets of safety clamps 6 to clamp the guide rails on the left and right columns, thereby braking the loading platform 200.

[0075] When the lifting wire rope 410 on one or both sides of the loading platform 200 breaks, the wedge block wire rope lifting point 4 is triggered, and the spring 408 of the wedge block wire rope lifting point 4 is released. The spring 408 generates a thrust that pushes open the wedge block wire rope lifting plate 409 located below it. This thrust simultaneously drives the brake line 407 to tighten and the anti-fall detection element 406 to spring open. The anti-fall detection element 406 outputs a fault signal to the control system. The wedge block wire rope lifting point 4 transmits the above-mentioned thrust through the brake line 407 to the two sets of safety clamps 6 on both sides of the loading platform 200, and the two sets of safety clamps 6 clamp the guide rails synchronously, thereby realizing the braking and anti-fall of the loading platform 200.

[0076] Specifically, when the loading platform 200 experiences a rope breakage on one side or both sides, the spring 408 on the wedge block wire rope lifting point 4 will immediately change from a compressed state to a released state due to the loss of tension from the lifting wire rope 410. Since the top of the spring 408 is connected to the wedge block lifting screw plate 405, the loading platform 200 is relatively stationary while the wedge block wire rope lifting plate 409 is floating. When the spring 408 pushes the wedge block wire rope lifting plate 409 downward, the wedge block wire rope lifting plate 409 drives the brake line 407 to tighten the spring's extension stroke and release the pressure head of the anti-fall detection element 406, thereby outputting an abnormal signal from the loading platform by the anti-fall detection element 406. The brake line 407, which connects to the wedge-shaped block wire rope lifting point 4, transmits the aforementioned thrust to the third brake line connector 703 and / or the fourth brake line connector 704. The first brake line connector 701 and the second brake line connector 702 are synchronously driven via the brake line fixing connecting shaft 706. Therefore, the aforementioned thrust causes the movement of the brake line 407 to be equivalently transmitted by the brake line fixing connecting shaft 706 and converted into the lifting stroke of the safety clamp lifting rod 601. This synchronously drives the two sets of safety clamps 6 to simultaneously clamp the guide rails on the left and right columns, thereby achieving braking of the loading platform 200.

[0077] In summary, the embodiments given in conjunction with the accompanying drawings are merely preferred solutions for achieving the design objectives of this application. Other alternative structures directly derived by those skilled in the art should also fall within the protection scope of this application.

Claims

1. A synchronous anti-fall mechanism for a cargo platform, characterized in that... It includes a steel wire rope that is connected in a closed loop between the upper pulley and the speed limiter on the top and bottom of the column, and a set of speed limiter levers that are fixed to the steel wire rope and move vertically with the steel wire rope. The side end of the speed limiter levers is fixed to the loading platform and moves up and down synchronously with the loading platform. Two sets of wedge-shaped steel wire rope lifting points and safety clamps are symmetrically arranged on both sides of the loading platform along the center. At the center of the loading platform, a set of brake line connecting components is set up, which are connected to a set of speed limiter levers, two sets of wedge-shaped steel wire rope lifting points and two sets of safety clamps respectively through brake lines. The brake cable connection assembly has five sets of connectors, from the first brake cable connector to the fifth brake cable connector. The fixed end of each set of connectors is fixedly connected to a set of brake cable fixed connection shafts. The first brake cable connector and the second brake cable connector are each connected to a set of safety clamps through a set of brake cables. The third brake cable connector and the fourth brake cable connector are each connected to a set of wedge block wire rope lifting points through a set of brake cables. The fifth brake cable connector is connected to the speed limiter lever through a set of brake cables. The wedge-shaped steel wire rope lifting point is connected to the lifting steel wire rope that drives the lifting and lowering of the cargo platform. When the lifting steel wire rope breaks, the wedge-shaped steel wire rope lifting point transmits the tension to the brake line connecting component through the brake line, and then synchronously to the two sets of safety clamps on both sides of the cargo platform through the brake line connecting component. The two sets of safety clamps clamp the guide rail synchronously, thereby realizing the braking and anti-fall of the cargo platform.

2. The synchronous anti-fall mechanism for the cargo platform according to claim 1, characterized in that: The brake cables connecting the first brake cable connector to the fifth brake cable connector are of the same length as those connecting the safety clamp, the wedge block wire rope lifting point, and the speed limiter lever.

3. The synchronous anti-fall mechanism for the cargo platform according to claim 1, characterized in that: The wedge-shaped block wire rope lifting point includes a wedge-shaped block lifting screw clamping plate and a brake line fixing plate fixed to the loading platform. The brake line fixing plate is suspended and connected to the brake line, and the end of the brake line is fixed to the wedge-shaped block wire rope lifting plate. The wedge-shaped head connecting the wire rope is hinged to the lifting screw through the wedge-shaped block fixing pin. After the lifting screw passes through the wedge-shaped block wire rope lifting plate, the shaft end of the lifting screw is locked to the wedge-shaped block wire rope lifting plate with a nut. A spring is sleeved on the lifting screw, and the spring is compressed and limited between the wedge-shaped block lifting screw clamping plate and the wedge-shaped block wire rope lifting plate. A fall protection detection element is installed on the wedge-shaped steel wire rope lifting plate, and the pressure head of the fall protection detection element is attached to the surface of the wedge-shaped steel wire rope lifting plate.

4. The synchronous anti-fall mechanism for the loading platform according to claim 1, characterized in that: The speed limiter lever includes two sets of vertically connected wire rope connecting wedges to fix the free ends of the wire ropes respectively. The two sets of wire rope connecting wedges are respectively connected to the two ends of the wedge and the lever mounting block by a set of wedge assembly pins. The wedge and the lever mounting block are fixed to one end of the lever. The other end of the lever is axially mounted on the lever mounting seat and can rotate around the axis of the lever mounting seat. The lever mounting seat is fixed to one side of the loading platform. One end of the lever suspension is connected to the return spring, and the other end of the return spring is fixed to the mounting plate by a spring fixing flat head bolt. The brake line is connected parallel to the return spring between the lever and the mounting plate, and the mounting plate is fixed to one side of the loading platform.

5. The synchronous anti-fall mechanism for the cargo platform according to claim 1, characterized in that: The speed limiter includes a limiting mounting bracket connected to one side of the column, a counterweight block fixedly connected to the limiting bracket, and a speed limiting element with a fixed pulley and a brake assembly installed on the counterweight block; the steel wire rope wound around the speed limiting element is kept taut through the counterweight block.

6. The synchronous anti-fall mechanism for the loading platform according to claim 1 or 5, characterized in that: The upper pulley includes a pulley mounting frame fixedly connected to one side of the column, a pulley rotation shaft for winding and connecting steel wire rope is provided on the pulley mounting frame, and an anti-slip rope protective cover is provided on the circumferential exterior of the pulley.

7. A stacker crane employing the synchronous anti-fall mechanism for the loading platform as described in any one of claims 1 to 6, characterized in that: It includes a cargo platform that is vertically slidably connected between two sets of columns, and the aforementioned cargo platform synchronous anti-fall mechanism is installed on the cargo platform.

8. A method for preventing a loading platform from falling using a synchronous anti-fall mechanism for a loading platform as described in any one of claims 1 to 6, characterized in that: Based on the connection of the brake line connecting components, two sets of wedge-shaped steel wire rope lifting points, safety clamps, and a set of speed limiter levers located on both sides of the loading platform implement synchronous linkage anti-fall control; When the loading platform is in an overspeed state, the speed limiter is triggered, the fixed pulley on it is braked, and the wire rope stops running; the lever of the speed limiter is pulled at the same time, and the tension is transmitted to the brake cable connecting component through the brake cable. The brake cable connecting component transmits the tension synchronously to the two sets of safety clamps on both sides of the loading platform. The two sets of safety clamps clamp the guide rails synchronously, thereby realizing the braking and anti-fall of the loading platform.

9. The method for preventing a cargo platform from falling according to claim 8, characterized in that: The wire rope is connected to the loading platform through the speed limiter lever. When the loading platform exceeds the speed limit, the linear speed of the wire rope will exceed the speed limit. The fixed pulley of the speed limiter will be tightly pressed against the outside of the fixed pulley by the brake assembly of the speed limiter to force it to stop rotating, and the wire rope will be braked by friction. When the speed limiter lever is in an overspeeding state, it tilts upward and pulls the brake cable upward, transmitting the tension to the fifth brake cable of the brake cable connecting assembly. The tension is then synchronously transmitted to the first brake cable connector and the second brake cable connector by the brake cable fixing connecting shaft. The first brake cable connector and the second brake cable connector then each connect to a set of safety clamps through another set of brake cables. The two sets of safety clamps located on both sides of the loading platform convert the movement of the first brake cable connector and the second brake cable connector caused by the above-mentioned tension into the lifting stroke of the safety clamp lifting rod, thereby synchronously driving the two sets of safety clamps to clamp the guide rails on the left and right columns, thus achieving the braking of the loading platform.

10. The method for preventing a cargo platform from falling according to claim 8, characterized in that: When the steel wire rope on one or both sides of the loading platform breaks, the wedge block steel wire rope lifting point is triggered, and the spring of the wedge block steel wire rope lifting point is released. The spring generates a thrust that pushes away the wedge block steel wire rope lifting plate located below it. This thrust simultaneously tightens the brake line and pops open the anti-fall detection element. The anti-fall detection element outputs a fault signal to the control system. The wedge block steel wire rope lifting point transmits the above thrust through the brake line to the two sets of safety clamps on both sides of the loading platform, and the two sets of safety clamps clamp the guide rails in sync, thereby realizing the braking and anti-fall of the loading platform.

Images