Rigid chain driven scissor lift

Abstract

The application provides a rigid chain driven scissor lifting platform, and relates to the technical field of lifting equipment. The rigid chain lifting platform body is provided with a multifunctional mechanism, which is in transmission connection with the rigid chain lifting platform body. The multifunctional mechanism comprises an expansion assembly, a falling prevention assembly and a protection assembly. The bottom of the rigid chain lifting platform body is fixed with a bottom plate, the expansion assembly is installed at the bottom of the bottom plate, and a support frame is fixed on the bottom plate. When the rigid chain lifting platform body is lifted, the chain shaft of the rigid chain lifting platform body drives the falling prevention assembly to expand synchronously, thereby forming a physical barrier to prevent personnel and tools from falling. At the same time, the expansion of the falling prevention assembly is transmitted through the first transmission mechanism to drive the expansion assembly at the bottom to extend outward, so that the supporting area of the equipment is increased synchronously when the equipment is lifted to a high altitude, and the overturning moment of high gravity center is effectively offset.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, specifically a rigid chain driven scissor lift platform. Background Technology

[0002] Rigid chain driven scissor lifts refer to devices that use a special chain with bending stiffness that can maintain rigid pushing in the pushing section and flex and fold back in the return section. The chain acts directly on the bottom sliding end or middle node of the scissor mechanism, and the scissor arm is forced to rotate around the hinge axis by the straight pushing / pulling of the chain, thereby realizing the lifting of the platform.

[0003] Patent publication number CN1222118764U discloses a lifting platform with a rigid chain structure. This utility model discloses a lifting platform with a rigid chain structure, belonging to the technical field of lifting and conveying equipment. It includes a base and a top plate. The top plate is installed on the upper end of the base, and the base and the top plate are connected by a scissor mechanism. A rigid chain mechanism connected to the bottom of the top plate is installed inside the base. The lifting platform is provided on one side. This utility model has the advantages of simple structure, long service life, and convenient maintenance. At the same time, the lifting and lowering of the top plate controlled by the rigid chain mechanism is flexible in operation, has high positioning accuracy, stable operation, and low working noise.

[0004] While the aforementioned patents can solve the problem of complex lifting structures, they still have the following shortcomings: 1. They lack an integrated fall protection mechanism, often requiring the installation of temporary fall arrestors or safety supports under the platform before operation. This not only involves complicated and time-consuming preparation procedures, but also risks omissions or improper installation due to the non-integrated design; 2. As the platform's lifting height increases, the bottom support span of the scissor mechanism becomes relatively fixed or even reduced due to structural contraction after deployment, resulting in insufficient anti-overturning moment under high center of gravity conditions. This makes it extremely prone to instability and overturning under lateral or eccentric loads, severely restricting the overall stability and safety of the equipment during high-altitude operations; 3. The platform's working surface usually lacks pre-set safety rope suspension anchor points that meet specifications, making it difficult for workers to easily connect their personal fall protection equipment. This results in a dangerous situation where high-altitude operations are conducted without reliable anchor points, creating a significant shortcoming in personnel safety. Summary of the Invention

[0005] The purpose of this invention is to provide a rigid chain-driven scissor lift platform, which aims to solve the problems in the prior art such as complicated anti-fall installation, easy swaying when the platform is raised to a high position, and the lack of safety rope suspension anchor points at the top of the platform, resulting in dangerous situations for high-altitude operations without reliable anchor points.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a rigid chain driven scissor lift platform includes a rigid chain lift platform body, a multi-functional mechanism is installed on the rigid chain lift platform body, and the multi-functional mechanism is connected to the rigid chain lift platform body in a transmission manner. The multifunctional mechanism includes an extension component, a fall protection component, and a protective component. A base plate is fixed to the bottom of the rigid chain lifting platform body. The extension component is installed at the bottom of the base plate. A support frame is fixed on the base plate. The fall protection component is installed above the support frame. The fall protection component is connected to the chain shaft of the rigid chain lifting platform body through a first transmission mechanism. The fall protection component is connected to the extension component via a second transmission mechanism, so that when the fall protection component is extended or retracted, the extension component can be driven to extend via the second transmission mechanism. The protective component is installed on the rigid chain lifting platform body, and a distance sensor is installed on the side wall of the rigid chain lifting platform body. The protective component and the distance sensor are connected via a controller signal.

[0007] Preferably, the fall arrestor assembly includes a worm gear, a worm wheel, a fall arrestor shaft, and an extension member; The extension member is mounted on the support frame, the anti-fall shaft rotates inside the extension member, the anti-fall shaft passes through the extension member and is fixedly connected to the worm gear, the worm rotates on the extension member through the mounting seat, and the worm and the worm gear mesh with each other; The worm gear is connected to the first transmission mechanism.

[0008] Preferably, the extension member includes two sets of connecting rods, a coil spring, a winding wheel, and an extension rod; The winding wheel is fixedly sleeved on the anti-fall shaft, and an anti-fall cloth is fixed on the winding wheel. The other end of the anti-fall cloth is fixedly connected to the extension rod. Two sets of the connecting rods are arranged below the anti-fall cloth, and one end of the connecting rod rotates on the support frame, while the other end of the two sets of connecting rods rotates on the extension rod. Each of the aforementioned links is hinged together by two links, and the coil spring is fixedly installed at the hinge point of the two links.

[0009] Preferably, the first transmission mechanism includes a first bevel gear set and a transmission rod; The chain shaft of the rigid chain lifting platform body is connected to the transmission rod through the first bevel gear set, and the upper end of the transmission rod is fixedly connected to the worm gear.

[0010] Preferably, the extension assembly includes two sets of telescopic components, four support legs, and a transmission component; Both sets of telescopic components are fixed to the bottom of the base plate, and every two support legs are fixed to the same set of telescopic components. The transmission component is connected to the two sets of telescopic components and is connected to the second transmission mechanism.

[0011] Preferably, each set of the telescopic components includes a guide tube, a gear, and two racks; The guide tube is fixed to the bottom of the base plate. The gear rotates inside the guide tube through the cylinder. The two racks slide inside the guide tube and are arranged opposite each other. The gear meshes with the two racks. Each cylinder is connected to the transmission component. One end of each rack that protrudes from the guide tube is fixedly connected to the support leg.

[0012] Preferably, the transmission component includes a round rod, a third bevel gear set, a cross rod, and a fourth bevel gear set; The crossbar rotates at the bottom of the base plate. Each cylinder is connected to the crossbar via a fourth bevel gear set. The third bevel gear set is installed in the middle of the crossbar. The crossbar is connected to the cylindrical rod via the third bevel gear set. The cylindrical rod rotates at the bottom of the base plate and is connected to the second transmission mechanism.

[0013] Preferably, the second transmission mechanism includes a second bevel gear set and a sprocket set; A short rod is rotatably mounted on the support frame via a base. The transmission rod and the short rod are connected by a second bevel gear set, and the round rod and the short rod are connected by a sprocket set.

[0014] Preferably, the protective assembly includes connecting members and guardrail members; The connecting component is driven by the chain shaft of the rigid chain lifting platform body, the connecting component is driven by the guardrail component, and the connecting component is connected to the distance sensor signal through the controller.

[0015] Preferably, the connecting component includes a telescopic rod, a spline sleeve, a spline telescopic rod, and two fifth bevel gear sets; The telescopic rod is installed on the rigid chain lifting platform body. The movable end of the telescopic rod is inserted into the spline sleeve guide. The spline sleeve guide is fitted on the chain shaft of the rigid chain lifting platform body. The chain shaft of the rigid chain lifting platform body is fitted with an insertion sleeve. The spline sleeve is provided with a slot that matches the insertion sleeve on the side near the insertion sleeve. The insert sleeve is connected to the spline telescopic rod via one set of fifth bevel gears, and the upper end of the spline telescopic rod is connected to the guardrail via another set of fifth bevel gears.

[0016] The beneficial effects are: 1. During the lifting process of the rigid chain lifting platform, the chain shaft of the rigid chain lifting platform drives the anti-fall component to unfold accordingly, forming a physical barrier to prevent personnel and tools from falling; at the same time, the unfolding action of the anti-fall component is transmitted through the first transmission mechanism, driving the bottom extension component to extend outward, so that the supporting bottom area of ​​the equipment increases synchronously when it is raised to a high altitude, effectively offsetting the overturning moment of the high center of gravity; in addition, when the platform reaches a high place, the chain shaft of the rigid chain lifting platform can also drive the protective component to flip from horizontal storage to vertical guardrail, simultaneously realizing the triple safety guarantee of passive anti-fall, dynamic foundation stabilization and active lifeline anchoring.

[0017] 2. The linkage between the rigid chain lifting platform body and the anti-fall component allows the anti-fall component to extend when the rigid chain lifting platform body is running, improving safety. The linkage between the anti-fall component and the extension component can simultaneously strengthen the anti-fall function and increase the support area, thereby improving the stability of the rigid chain lifting platform body in use.

[0018] 3. When not in use or not raised to a high position, the protective component is embedded in the top of the rigid chain lifting platform. When needed, it will flip out from the top of the rigid chain lifting platform for use, making it convenient for storage and use of the protective component. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the rigid chain lifting platform body of the present invention; Figure 2 This is a structural diagram illustrating the usage process of the present invention; Figure 3 This is a side view of the structure of the present invention; Figure 4 This is a front view structural diagram of the present invention; Figure 5 In this invention Figure 4 A magnified structural diagram at point A; Figure 6 In this invention Figure 4 A magnified structural diagram at point B; Figure 7 This is a schematic diagram of the fall protection component of the present invention; Figure 8 In this invention Figure 7 A magnified structural diagram at point C; Figure 9 This is a structural schematic diagram of the connecting rod of the present invention; Figure 10 This is a schematic diagram of the telescopic component structure of the present invention; Figure 11 This is a schematic diagram of the transmission component of the present invention; Figure 12This is a schematic diagram of the structure of the protective component of the present invention installed on the rigid chain lifting platform body; Figure 13 This is a schematic diagram of the structure of the protective component and the rigid chain lifting platform body of the present invention.

[0020] In the diagram: 1. Rigid chain lifting platform body; 3. Telescopic component; 301. Guide square tube; 302. Gear; 303. Rack; 4. Anti-fall component; 401. Worm; 402. Worm wheel; 403. Anti-fall shaft; 5. Connecting component; 501. Telescopic rod; 502. Spline sleeve; 503. Spline telescopic rod; 504. Fifth bevel gear set; 6. Base plate; 7. Support frame; 8. First transmission mechanism; 801. First bevel gear set; 802. Transmission rod; 902. Sprocket set; 10. Connecting rod; 11. Coil spring; 12. Winding wheel; 13. Extension rod; 14. Anti-fall cloth; 15. Support leg; 16. Transmission component; 1601. Round rod; 1602. Third bevel gear set; 1603. Crossbar; 1604. Fourth bevel gear set; 17. Guardrail; 18. Insert sleeve. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. Example

[0022] A rigid chain driven scissor lift includes a rigid chain lift body 1, on which a multi-functional mechanism is installed. The multi-functional mechanism is connected to the rigid chain lift body 1 in a transmission manner, so that the multi-functional mechanism can be adjusted as the rigid chain lift body 1 rises and falls, thereby improving the safety of personnel using the rigid chain lift body 1.

[0023] like Figures 1-9 As shown, the multifunctional mechanism includes a fall protection component 4. A base plate 6 is fixed to the bottom of the rigid chain lifting platform body 1. An extension component is installed at the bottom of the base plate 6. A support frame 7 is fixed on the base plate 6. The fall protection component 4 is installed above the support frame 7, so that when the rigid chain lifting platform body 1 is raised or lowered, it can drive the fall protection component 4 to expand or retract, thereby achieving the fall protection effect.

[0024] Specifically, the fall arrestor assembly 4 includes a worm gear 401, a worm wheel 402, a fall arrestor shaft 403, and an extension member. The extension member is mounted on the support frame 7. The fall arrestor shaft 403 rotates within the extension member and extends out of the extension member to be fixedly connected to the worm wheel 402. The worm gear 401 rotates on the extension member via a mounting seat. The worm gear 401 and the worm wheel 402 mesh with each other, so that when the chain shaft of the rigid chain lifting platform body 1 rotates, it can drive the worm gear 401 through the first transmission mechanism 8, thereby realizing the extension and retraction of the extension member.

[0025] In this embodiment, there are several sets of anti-fall components 4, which are distributed and installed around the rigid chain lifting platform body 1. The anti-fall shafts 403 between the anti-fall components 4 are connected by a connecting bevel gear set, so that the rigid chain lifting platform body 1 can drive one set of anti-fall components 4 to rotate, and then drive the remaining anti-fall components 4 to rotate under the action of the connecting bevel gear set, so that multiple sets of anti-fall cloths 14 can be unfolded and retracted.

[0026] The extension component includes two sets of connecting rods 10, a coil spring 11, a winding wheel 12, and an extension rod 13. The winding wheel 12 is fixedly sleeved on the fall arresting shaft 403, and a fall arresting cloth 14 is fixedly mounted on the winding wheel 12. The other end of the fall arresting cloth 14 is fixedly connected to the extension rod 13. The two sets of connecting rods 10 are located below the fall arresting cloth 14, with one end of the connecting rod 10 rotating on the support frame 7 and the other end of the two sets of connecting rods rotating on the extension rod 13. Each connecting rod 10 is hinged together by two connecting rods, and the coil spring 11 is fixedly installed at the hinge point of the two connecting rods. When the fall arresting shaft 403 rotates, the coil spring 11 enables the two connecting rods to rotate, thereby folding the connecting rod 10. When the fall arresting shaft 403 rotates, the fall arresting cloth 14 can unfold and retract under the action of the fall arresting shaft 403 and the connecting rod 10. When the fall arresting cloth 14 unfolds, the two connecting rods can rotate outward under the action of the torsion spring 11, thereby extending the fall arresting cloth 14. When the fall arresting cloth 14 retracts, the fall arresting shaft 403 can rotate, thereby rolling up the fall arresting cloth 14 and causing the two connecting rods to rotate and retract.

[0027] like Figures 4-7 As shown, the fall arrestor 4 is connected to the chain shaft of the rigid chain lifting platform body 1 via the first transmission mechanism 8, so that the chain shaft of the rigid chain lifting platform body 1 can drive the fall arrestor 4 to unfold or retract when it rotates.

[0028] Specifically, the worm gear 401 is connected to the first transmission mechanism 8, which includes a first bevel gear set 801 and a transmission rod 802. The chain shaft of the rigid chain lifting platform body 1 is connected to the transmission rod 802 through the first bevel gear set 801. The upper end of the transmission rod 802 is fixedly connected to the worm gear 401, so that when the chain shaft of the rigid chain lifting platform body 1 rotates, it can both drive the rigid chain lifting platform body 1 to lift and lower, and drive the worm gear 401 to rotate through the first bevel gear set 801 and the transmission rod 802.

[0029] Working principle: When the rigid chain lifting platform body 1 is raised or lowered, the chain shaft inside it will rotate. The rotation of the chain shaft is transmitted to the worm gear 401 through the first bevel gear set 801 and the transmission rod 802. After the power is transmitted to the fall protection component 4, it first drives the worm gear 401 to rotate. Since the worm gear 401 and the worm wheel 402 mesh with each other, the horizontal rotation is converted into vertical rotation, which drives the fall protection shaft 403 to rotate synchronously. When the rigid chain lifting platform body 1 is raised, the first transmission mechanism 8 drives the worm gear 401 to rotate, which drives the worm wheel 402 and the fall protection shaft 403 to rotate. The rotation of the fall protection shaft 403 drives the winding wheel 12 fixed on it to rotate, thereby releasing the fall protection cloth 14 pre-wound on the wheel downward. At this time, when the fall protection cloth 14 is released, the coil spring between the two sets of connecting rods 10 accumulates elastic potential energy and generates an outward opening torque, causing the connecting rods to... As the platform continues to rise, the connecting rod 10 fully unfolds, tightening the fall arrestor cloth 14 and forming a flexible, inclined or vertical protective net between the bottom of the lifting platform and the base plate 6 to prevent tools or personnel from falling. When the rigid chain lifting platform body 1 descends, the first transmission mechanism 8 drives the worm gear 401 to rotate in the opposite direction, driving the fall arrestor shaft 403 to rotate. The reverse rotation of the fall arrestor shaft 403 drives the winding wheel 12 to rotate, starting to rewind the fall arrestor cloth 14 onto the wheel. As the fall arrestor cloth 14 is retracted, the extension rod 13 retracts inward, and the connecting rod 10 loses its outward supporting force. Under the tension of the fall arrestor cloth 14 and the gravity of its own structure, it overcomes the elasticity of the coil spring 11 and gradually folds inward. The fall arrestor cloth 14 is fully rolled up, and the connecting rod 10 is completely folded and close to the side of the support frame 7, without affecting the movement and low-level passage of the lifting platform. Example

[0030] In this embodiment, the same structure as in Embodiment 1 will not be described again. In the above embodiment, when the rigid chain lifting platform body 1 is raised to a high altitude, the bottom of the rigid chain lifting platform body 1 has a small support area, resulting in poor support stability.

[0031] Based on the above problems, in this embodiment, as follows: Figures 1-4 , Figure 10 and Figure 11 As shown, the multi-functional mechanism also includes an extension component. The fall arrestor 4 is connected to the extension component via the second transmission mechanism 9, so that when the fall arrestor 4 extends or retracts, the extension component can be driven to extend via the second transmission mechanism 9. This allows the extension component to increase the contact area with the ground during the lifting process of the rigid chain lifting platform 1, thereby improving the support stability and preventing the rigid chain lifting platform 1 from shaking.

[0032] Specifically, the expansion assembly includes two sets of telescopic components 3, four support legs 15, and a transmission component 16. Both sets of telescopic components 3 are fixed to the bottom of the base plate 6, and every two support legs 15 are fixed to the same set of telescopic components 3. The transmission component 16 is connected to the two sets of telescopic components 3 and is also connected to the second transmission mechanism 9, so that the activation of the anti-fall assembly 4 can drive the telescopic components 3 to expand through the transmission component 16, thereby increasing the support area of ​​the support legs 15.

[0033] Each telescopic component 3 includes a guide tube 301, a gear 302, and two racks 303. The guide tube 301 is fixed to the bottom of the base plate 6. The gear 302 rotates inside the guide tube 301 via a cylinder. The two racks 303 slide within the guide tube 301 and are arranged opposite each other. The gear 302 meshes with the two racks 303. Each cylinder is connected to the transmission component 16, so that the activation of the anti-fall component 4 can drive the cylinder to rotate through the transmission component 16. The rotation of the cylinder can drive the gear 302 to rotate, thereby enabling the two racks 303 in the same guide tube 301 to move in opposite or opposite directions. One end of each rack 303 protruding from the guide tube 301 is fixedly connected to the support leg 15. When the rack 303 moves, it can drive the corresponding support leg 15 to move, thereby increasing the support area and making the rigid chain lifting platform body 1 more stable during use.

[0034] The transmission component 16 includes a round rod 1601, a third bevel gear set 1602, a crossbar 1603, and a fourth bevel gear set 1604. In this embodiment, the crossbar 1603 includes a main rod that is driven by the round rod 1601, a secondary rod that is driven by the cylinder, and a total bevel gear set that is driven by the main rod and the secondary rod. The total bevel gear includes a total main bevel gear and a total secondary bevel gear. The total main bevel gear is fixed on the main rod, and the total secondary bevel gear is fixed on the secondary rod. The total main bevel gear and the total secondary bevel gear mesh with each other, so the main rod can drive the secondary rod to rotate, thereby driving the cylinder to rotate. The crossbar 1603 rotates at the bottom of the base plate 6. Each cylinder is driven by the crossbar 1603 through the fourth bevel gear set 1604. In this embodiment, the fourth bevel gear set 1604 includes a fourth main bevel gear and a fourth secondary bevel gear. The fourth main bevel gear is fixedly connected to the crossbar 1603. The fourth bevel gear is fixedly connected to the cylinder. Due to the fourth main bevel gear and the fourth secondary bevel gear, the crossbar 1603 can drive the cylinder to rotate. The third bevel gear set 1602 is installed in the middle of the crossbar 1603. The crossbar 1603 is connected to the round rod 1601 through the third bevel gear set 1602. In this embodiment, the third bevel gear set 1602 includes a third main bevel gear and a third secondary bevel gear. The third main bevel gear is fixed on the round rod 1601, and the third secondary bevel gear is fixed on the crossbar 1603. The third main bevel gear and the third secondary bevel gear mesh with each other, so the rotation of the round rod 1601 can drive the crossbar 1603 to rotate. The round rod 1601 rotates at the bottom of the base plate 6. The round rod 1601 is connected to the second transmission mechanism 9 so that after the fall arrestor 4 is activated, it can drive the round rod 1601 to rotate through the second transmission mechanism 9.

[0035] The second transmission mechanism 9 includes a second bevel gear set 901 and a sprocket set 902. In this embodiment, the second bevel gear set 901 includes a second main bevel gear and a second auxiliary bevel gear. The second main bevel gear is fixed on the transmission rod 802, and the second auxiliary bevel gear is fixedly connected to the short rod. The second main bevel gear and the second auxiliary bevel gear mesh with each other, causing the transmission rod 802 to rotate, which in turn drives the short rod to rotate. The short rod is rotatably mounted on the support frame 7 via a base. The transmission rod 802 and the short rod are connected by the second bevel gear set 901. The 1601 and the short rod are connected by a sprocket assembly 902. In this embodiment, the sprocket assembly 902 includes a main sprocket, a secondary sprocket, and a chain. The main sprocket is fixed on the round rod 1601, and the secondary sprocket is fixed on the short rod. The main sprocket and the secondary sprocket are connected by a chain drive so that the rotation of the short rod can drive the round rod 1601 to rotate, thereby causing the transmission rod 802 to rotate. This rotation can then drive the round rod 1601 to rotate through the second bevel gear assembly 901 and the sprocket assembly 902. In turn, the rotation of the round rod 1601 can drive the crossbar 1601 to rotate.

[0036] Compared to Embodiment 1, in this embodiment, the linkage between the rigid chain lifting platform body 1, the anti-fall component 4, and the extension component allows the anti-fall component 4 to extend when the rigid chain lifting platform body 1 is running, thus improving safety. The linkage between the anti-fall component 4 and the extension component can simultaneously enhance anti-fall protection and increase the support area, thereby improving the stability of the rigid chain lifting platform body 1 in use. Example

[0037] In this embodiment, the same structure as in Embodiments 1 and 2 will not be described again. In the above embodiments, the personnel stand on the top of the rigid chain lifting platform body 1, and no safety rope suspension point is set, which makes the personnel's safety relatively low.

[0038] Based on the above problems, in this embodiment, as follows: Figure 12 and Figure 13 As shown, the multifunctional mechanism also includes a protective component, which is installed on the rigid chain lifting platform body 1. A distance sensor is installed on the side wall of the rigid chain lifting platform body 1 to measure the distance between the top of the rigid chain lifting platform body 1 and the ground. The protective component and the distance sensor are connected by a controller signal. When the distance sensor detects that the distance between the top of the rigid chain lifting platform body 1 and the ground is greater than a preset value, it can drive the protective component to start through the controller, so that the protective component flips to a vertical state to protect the personnel on the protective component.

[0039] Specifically, the protective components include a connecting member 5 and a guardrail 17; the connecting member 5 is connected to the chain shaft of the rigid chain lifting platform body 1, the connecting member 5 is connected to the guardrail 17, and the connecting member 5 is connected to the distance sensor signal through the controller. When the distance sensor detects that the distance between the top of the rigid chain lifting platform body 1 and the ground is greater than a preset value, the controller can drive the connecting member 5 to start, thereby enabling the connecting member 5 to drive the guardrail 17 to flip.

[0040] In this embodiment, the guardrail 17 consists of several groups, which are connected by a connecting bevel gear set. One group of guardrail 17 can rotate under the action of the connecting member 5, and then the connecting bevel gear set drives the remaining guardrail 17 to rotate, so that the guardrail 17 can protect the surrounding area.

[0041] In this embodiment, the structure and principle of the distance sensor being activated by the controller driving the connecting component 5 are existing technologies and will not be described in detail here.

[0042] The connecting component 5 includes a telescopic rod 501, a spline sleeve 502, a spline telescopic rod 503, and two fifth bevel gear sets 504. In this embodiment, the telescopic rod 501 is an electric telescopic rod. The structure and principle of the electric telescopic rod are existing technologies and will not be described in detail here. The telescopic rod 501 is installed on the rigid chain lifting platform body 1. The movable end of the telescopic rod 501 is guided and inserted into the spline sleeve 502 so that when the telescopic rod 501 is activated, it can push the spline sleeve 502 to move along the chain shaft. The rotation of the spline sleeve 502 cannot drive the telescopic rod 501 to rotate. The spline sleeve 502 is guided and fitted onto the chain shaft of the rigid chain lifting platform body 1. An insertion sleeve 1 is fitted onto the chain shaft of the rigid chain lifting platform body 1. 8. The spline sleeve 502 has a slot that fits into the insert sleeve 18 on the side near the insert sleeve 18. The spline sleeve 502 is inserted into the insert sleeve 18 under the action of the telescopic rod 501. Then, the chain shaft of the rigid chain lifting platform body 1 rotates, which drives the spline sleeve 502 to rotate, and then drives the insert sleeve 18 to rotate. The insert sleeve 18 is connected to the spline telescopic rod 503 through one set of fifth bevel gears 504. The upper end of the spline telescopic rod 503 is connected to the guardrail 17 through another set of fifth bevel gears 504, so that the insert sleeve 18 rotates under the action of the spline sleeve 502, and then drives the guardrail 17 to flip through the two sets of fifth bevel gears 504 and the spline telescopic rod 503.

[0043] In this embodiment, the top of the rigid chain lifting platform body 1 is provided with a storage slot for the guardrail 17. A pressure sensor is provided on the inner wall of the storage slot. The structure and principle of the pressure sensor are existing designs and will not be described in detail here. The pressure sensor is connected to the controller. When the guardrail is flipped to contact the pressure sensor, the pressure sensor will trigger the telescopic rod 501 through the controller, causing the spline sleeve 502 to disengage from the insertion sleeve 18. At this time, the chain shaft of the rigid chain lifting platform body 1 will no longer drive the guardrail to flip. A pin mechanism is also provided in the storage slot. When the guardrail contacts the pressure sensor, the pressure sensor will also drive the pin mechanism to insert into the guardrail through the controller to lock the position of the guardrail. The pin mechanism includes an electric telescopic rod and a pin. The pin is fixed to the end of the electric telescopic rod. The electric telescopic rod is connected to the controller. The guardrail is provided with a socket for the pin to be inserted. When the electric telescopic rod is started, the pin can be inserted into the socket under the action of the electric telescopic rod to lock the position of the guardrail. Otherwise, the guardrail can be flipped into the storage slot.

[0044] Compared to Embodiments 1 and 2, in this embodiment, the protective component can be flipped out to provide a suspension point for the safety rope for the operator, thereby improving the safety of personnel on the rigid chain lifting platform body 1.

[0045] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. The basic concept of the present invention is that by unfolding the anti-fall component 4, the extension component, and the protective component, the rigid chain lifting platform body 1 can improve the safety of the operator and the stability of the rigid chain lifting platform body 1 during the lifting process. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A rigid chain driven scissor lift platform, comprising a rigid chain lift platform body (1), characterized in that, The rigid chain lifting platform body (1) is equipped with a multi-functional mechanism, which is connected to the rigid chain lifting platform body (1) in a transmission manner. The multifunctional mechanism includes an extension component, a fall protection component (4), and a protective component. The bottom of the rigid chain lifting platform body (1) is fixed with a base plate (6). The extension component is installed on the bottom of the base plate (6). A support frame (7) is fixed on the base plate (6). The fall protection component (4) is installed above the support frame (7). The fall protection component (4) is connected to the chain shaft of the rigid chain lifting platform body (1) through a first transmission mechanism (8). The fall arrestor (4) is connected to the extension component via the second transmission mechanism (9) so that when the fall arrestor (4) is extended or retracted, the extension component can be driven to extend via the second transmission mechanism (9); The protective component is installed on the rigid chain lifting platform body (1), and a distance sensor is installed on the side wall of the rigid chain lifting platform body (1). The protective component and the distance sensor are connected by a controller signal.

2. The rigid chain-driven scissor lift platform according to claim 1, characterized in that, The fall arrestor assembly (4) includes a worm gear (401), a worm wheel (402), a fall arrestor shaft (403), and an extension member; The extension member is installed on the support frame (7), the anti-fall shaft (403) rotates inside the extension member, the anti-fall shaft (403) passes through the extension member and is fixedly connected to the worm wheel (402), the worm (401) rotates on the extension member through the mounting seat, and the worm (401) and the worm wheel (402) mesh with each other; The worm gear (401) is connected to the first transmission mechanism (8) for transmission.

3. A rigid chain-driven scissor lift platform according to claim 2, characterized in that, The extension member includes two sets of connecting rods (10), a coil spring (11), a winding wheel (12), and an extension rod (13). The winding wheel (12) is fixedly sleeved on the anti-fall shaft (403), and an anti-fall cloth (14) is fixed on the winding wheel (12). The other end of the anti-fall cloth (14) is fixedly connected to the extension rod (13). Two sets of connecting rods (10) are set below the anti-fall cloth (14), and one end of the connecting rod (10) rotates on the support frame (7), while the other end of the two sets of connecting rods (10) rotates on the extension rod (13). Each of the links (10) is hinged together by two links, and the coil spring (11) is fixedly installed at the hinge point of the two links.

4. A rigid chain-driven scissor lift platform according to claim 3, characterized in that, The first transmission mechanism (8) includes a first bevel gear set (801) and a transmission rod (802); The chain shaft of the rigid chain lifting platform body (1) is connected to the transmission rod (802) through the first bevel gear set (801), and the upper end of the transmission rod (802) is fixedly connected to the worm gear (401).

5. A rigid chain-driven scissor lift platform according to claim 3, characterized in that, The extension assembly includes two sets of telescopic components (3), four support legs (15), and a transmission component (16). Both sets of telescopic components (3) are fixed to the bottom of the base plate (6), and each pair of support legs (15) are fixed on the same set of telescopic components (3). The transmission component (16) is connected to the two sets of telescopic components (3) and is connected to the second transmission mechanism (9).

6. A rigid chain-driven scissor lift platform according to claim 5, characterized in that, Each of the telescopic components (3) includes a guide tube (301), a gear (302) and two racks (303). The guide tube (301) is fixed to the bottom of the base plate (6). The gear (302) rotates inside the guide tube (301) through the cylinder. The two racks (303) slide inside the guide tube (301) and are arranged opposite to each other. The gear (302) meshes with the two racks (303). Each cylinder is connected to the transmission component (16) for transmission. Each of the racks (303) is fixedly connected to the support leg (15) at one end of the guide tube (301).

7. A rigid chain-driven scissor lift platform according to claim 6, characterized in that, The transmission component (16) includes a round rod (1601), a third bevel gear set (1602), a cross rod (1603), and a fourth bevel gear set (1604). The crossbar (1603) rotates at the bottom of the base plate (6). Each cylinder is connected to the crossbar (1603) via a fourth bevel gear set (1604). The third bevel gear set (1602) is installed in the middle of the crossbar (1603). The crossbar (1603) is connected to the round rod (1601) via the third bevel gear set (1602). The round rod (1601) rotates at the bottom of the base plate (6). The round rod (1601) is connected to the second transmission mechanism (9).

8. A rigid chain-driven scissor lift platform according to claim 7, characterized in that, The second transmission mechanism includes a sprocket assembly (902); The anti-fall shaft (403) and the round rod (1601) are connected by a sprocket set (902).

9. A rigid chain-driven scissor lift platform according to claim 1, characterized in that, The protective components include connecting members (5) and guardrails (17); The connecting member (5) is connected to the chain shaft of the rigid chain lifting platform body (1) via transmission, the connecting member (5) is connected to the guardrail (17) via transmission, and the connecting member (5) is connected to the distance sensor signal via the controller.

10. A rigid chain-driven scissor lift platform according to claim 9, characterized in that, The connecting member (5) includes a telescopic rod (501), a spline sleeve (502), a spline telescopic rod (503), and two fifth bevel gear sets (504). The telescopic rod (501) is installed on the rigid chain lifting platform body (1). The movable end of the telescopic rod (501) is guided and inserted into the spline sleeve (502). The spline sleeve (502) is guided and fitted onto the chain shaft of the rigid chain lifting platform body (1). The chain shaft of the rigid chain lifting platform body (1) is fitted with a plug sleeve (18). The spline sleeve (502) is provided with a slot that matches the plug sleeve (18) on the side near the plug sleeve (18). The insert sleeve (18) is connected to the spline telescopic rod (503) via one of the fifth bevel gear sets (504), and the upper end of the spline telescopic rod (503) is connected to the guardrail (17) via another fifth bevel gear set (504).

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