Fall protection device for lifting platform

Abstract

This utility model relates to the technical field of automated parking system equipment, specifically a fall protection device for a lifting platform. It includes a platform body that moves vertically within an elevator shaft and a base fixedly connected to the bottom of the elevator shaft. A support column is fixedly connected to each of the four corners of the top of the base, and a protective clip is positioned between two opposing support columns, located below the platform body. This utility model uses a vertically movable protective clip within the elevator shaft and a servo motor to drive a threaded rod, causing the protective clip to move synchronously with the platform body. When the platform body falls, the protective clip immediately stops moving and supports the platform body, preventing further descent. This structure achieves fall protection through mechanical transmission, offering high reliability, and the threaded drive has a self-locking characteristic, effectively locking the protective clip's position.

Description

Technical Field

[0001] This utility model relates to the technical field of automated parking garage equipment, specifically to a fall protection device for a lifting platform. Background Technology

[0002] With the rapid increase in urban vehicle ownership, multi-level parking garages, as a highly efficient space-utilizing parking facility, have been widely used in urban parking. In multi-level parking garages, the lifting platform is a key component for vehicle storage and retrieval, and its operational safety is paramount. However, in actual use, due to various reasons such as mechanical failure, component aging, and control system malfunction, the lifting platform is at risk of accidental collapse. Once the lifting platform collapses, it not only damages vehicles but may also endanger human lives, causing serious safety accidents.

[0003] Currently, most fall arrest devices for automated parking garage lifts on the market employ a single mechanical locking or sensor-triggered braking method. For example, some devices rely solely on simple mechanical hooks to engage and brake when the platform falls. This method is prone to damage to the hooks or inaccurate engagement due to excessive impact force during high-speed falls, resulting in low reliability. Other devices detect abnormal platform descent using sensors and then control the braking components, but sensors may misjudge or delay response, failing to effectively prevent the platform from falling in the first instance. Furthermore, existing fall arrest devices also have shortcomings in their cushioning design. When the platform is braked upon falling, the powerful impact can easily damage the equipment itself, shortening its lifespan, and also failing to effectively reduce injuries to vehicles and personnel.

[0004] In view of this, we propose a fall protection device for the lifting platform. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a fall protection device for a lifting platform.

[0006] The technical solution of this utility model is:

[0007] The fall protection device for the lifting platform includes a platform body that moves vertically within the elevator shaft and a base fixedly connected to the bottom of the elevator shaft. A support column is fixedly connected to each of the four corners of the base's top. A protective clip is positioned between two opposing support columns, located below the platform body. The protective clip has a slot on its top, and the two ends of the platform body closest to the protective clip extend into the two slots respectively. A sliding groove is provided on the support column for the vertical movement of the protective clip. A threaded rod is rotatably installed within the sliding groove. A threaded hole is provided on the protective clip for threaded connection with the threaded rod. A servo motor with an output shaft coaxially fixed to the threaded rod is mounted on the top of the support column. By installing a vertically movable protective clip within the elevator shaft and using a servo motor to drive the threaded rod to move the protective clip synchronously with the platform body, when the platform body falls, the protective clip immediately stops moving and supports the platform body, preventing further descent. This structure achieves fall protection through mechanical transmission, offering high reliability, and the threaded transmission has a self-locking characteristic, effectively locking the protective clip's position.

[0008] As a preferred technical solution, the lifting platform is installed on an elevator. During the vertical movement of the lifting platform, the distance between the protective clip and the lifting platform remains constant. Linking the protective clip with the lifting platform ensures that the distance between them remains constant, preventing excessive impact force during a platform fall due to excessive distance. This design allows the protective clip to move with the platform in real time, activating immediately upon impact, shortening response time and improving safety.

[0009] As a preferred technical solution, two guide shafts are symmetrically fixedly connected to the top of the slot, and these guide shafts are inserted into the platform body. The insertion of the guide shafts at the top of the slot into the platform body further enhances the connection stability between the protective card and the platform body. In the event of a fall, the guide shafts can restrict the lateral displacement of the platform body, preventing it from detaching from the slot and ensuring the reliability of the protective effect.

[0010] As a preferred technical solution, a support block is fixedly connected to the bottom of the sliding groove, and a buffer spring is fixedly connected to the top of the support block. The buffer spring at the bottom of the sliding groove can provide cushioning when the protective card descends to its extreme position, reducing the impact force on the equipment and vehicle.

[0011] As a preferred technical solution, a buffer block is fixedly connected to the top of the buffer spring, and a limiting post is integrally formed coaxially at the bottom of the threaded rod. The buffer block and the limiting post are slidably connected vertically. The sliding connection between the buffer block and the limiting post, in conjunction with the buffer spring, can further disperse the impact force and improve the buffering effect.

[0012] As a preferred technical solution, a damping rod is fixedly connected to each of the four corners of the top of the support block, and the piston rod of the damping rod is fixedly connected to the bottom of the buffer block. The damping rod can absorb impact energy, slow down the rebound speed of the buffer block, and avoid secondary impact caused by rebound.

[0013] As a preferred technical solution, a magnet is fixedly connected to both the top of the buffer block and the bottom of the protective card, and the two magnets repel each other. The repulsive force of the magnets provides additional cushioning, further reducing the impact force.

[0014] As a preferred technical solution, a limiting groove is formed on the outer circumference of the limiting post, and a limiting protrusion is integrally formed inside the buffer block, which is slidably connected to the limiting groove. The cooperation between the limiting groove and the limiting protrusion can prevent the buffer block from rotating and ensure that it always maintains the correct sliding relationship with the limiting post.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention utilizes a movable safety catch installed within the elevator shaft. A servo motor drives a threaded rod to move the safety catch synchronously with the platform body. When the platform body falls, the safety catch immediately stops moving and supports the platform body, preventing further descent. This structure achieves fall protection through mechanical transmission, offering high reliability. Furthermore, the threaded drive has a self-locking characteristic, effectively locking the safety catch in place. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the platform body and the protective card in this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the support column in this utility model;

[0020] Figure 4 In this utility model Figure 3 A partial structural diagram;

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Base; 2. Support column; 20. Sliding groove; 21. Threaded rod; 22. Servo motor; 23. Buffer block; 230. Limiting protrusion; 24. Limiting column; 240. Limiting groove; 25. Magnet; 26. Damping rod; 27. Buffer spring; 28. Support block; 3. Platform body; 4. Protective cover; 5. Protective clip; 50. Slot; 51. Guide shaft; 52. Threaded hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to the accompanying drawings. This utility model provides a technical solution:

[0025] like Figures 1-4 As shown, the fall protection device for the lifting platform includes a platform body 3 that moves vertically within the elevator shaft and a base 1 fixedly connected to the bottom of the elevator shaft. A support column 2 is fixedly connected to each of the four corners of the top of the base 1. A protective clip 5 is provided between two opposing support columns 2, located below the platform body 3. A slot 50 is provided on the top of the protective clip 5, and the two ends of the platform body 3 closest to the protective clip 5 extend into the two slots 50 respectively. A sliding groove 20 is provided on the support column 2 for the protective clip 5 to move vertically. A threaded rod 21 is rotatably installed in the sliding groove 20. A threaded hole 52 is provided on the protective clip 5 for threaded connection with the threaded rod 21. A servo motor 22 with an output shaft coaxially fixed to the threaded rod 21 is installed on the top of the support column 2. By setting up a vertically movable protective clip 5 within the elevator shaft and using the servo motor 22 to drive the threaded rod 21 to move the protective clip 5 synchronously with the platform body 3, when the platform body 3 falls, the protective clip 5 can immediately stop moving and support the platform body 3, preventing it from continuing to fall. This structure achieves fall protection through mechanical transmission, ensuring high reliability. Furthermore, the threaded transmission has a self-locking characteristic, effectively locking the protective clip at position 5.

[0026] like Figure 1 As shown, it should be added that a protective cover 4 is fixedly connected to the top of the platform body 3, and a wheel limiting plate 30 is slidably installed on both the front and rear sides. A hydraulic cylinder 31 with a piston rod fixed to the wheel limiting plate 30 is installed at the bottom of the platform body 3. The protective cover 4 and the wheel limiting plate 30 can increase the stability of the vehicle on the platform body 3.

[0027] like Figure 1 As shown, in a preferred embodiment, the lifting platform is installed on an elevator. During the vertical movement of the lifting platform, the distance between the protective clip 5 and the lifting platform remains constant. Linking the protective clip 5 with the lifting platform ensures that the distance remains constant, preventing excessive impact force when the platform falls due to excessive distance. This design allows the protective clip 5 to move with the platform in real time, functioning immediately upon impact, shortening response time and improving safety.

[0028] like Figure 2As shown, in a preferred embodiment, two guide shafts 51 are symmetrically fixedly connected to the top of the slot 50, and the guide shafts 51 are inserted into the platform body 3. The insertion of the guide shafts 51 at the top of the slot 50 into the platform body 3 further enhances the connection stability between the protective card 5 and the platform body 3. In the event of a fall, the guide shafts 51 can limit the lateral displacement of the platform body 3, preventing it from coming out of the slot 50 and ensuring the reliability of the protective effect.

[0029] like Figure 3 As shown, in a preferred embodiment, a support block 28 is fixedly connected to the bottom of the sliding groove 20, and a buffer spring 27 is fixedly connected to the top of the support block 28. The buffer spring 27 at the bottom of the sliding groove 20 can provide cushioning when the protective card 5 descends to its extreme position, reducing the impact force on the equipment and vehicle.

[0030] like Figure 3 As shown in the preferred embodiment, a buffer block 23 is fixedly connected to the top of the buffer spring 27, and a limiting post 24 is integrally formed coaxially at the bottom of the threaded rod 21. The buffer block 23 and the limiting post 24 are slidably connected vertically. The sliding connection between the buffer block 23 and the limiting post 24, in conjunction with the buffer spring 27, can further disperse the impact force and improve the buffering effect.

[0031] like Figure 3 As shown, in a preferred embodiment, a damping rod 26 is fixedly connected to each of the four corners of the top of the support block 28, and the piston rod of the damping rod 26 is fixedly connected to the bottom of the buffer block 23. The damping rod 26 can absorb impact energy, slow down the rebound speed of the buffer block 23, and avoid secondary impact caused by rebound.

[0032] like Figure 3 As shown, in a preferred embodiment, a magnet 25 is fixedly connected to both the top of the buffer block 23 and the bottom of the protective card 5, and the two magnets 25 repel each other. The repulsive force of the magnets 25 provides additional cushioning, further reducing the impact force.

[0033] like Figure 4 As shown, in a preferred embodiment, a limiting groove 240 is provided on the outer circumference of the limiting post 24, and a limiting protrusion 230 is integrally formed inside the buffer block 23 and slidably connected to the limiting groove 240. The cooperation between the limiting groove 240 and the limiting protrusion 230 can prevent the buffer block 23 from rotating and ensure that it always maintains the correct sliding relationship with the limiting post 24.

[0034] When using the fall protection device of this utility model's lifting platform:

[0035] Normal operating condition: The lifting platform is installed on the elevator and moves up and down in the elevator shaft under the drive of the elevator. The servo motor 22 operates synchronously, driving the threaded rod 21 to rotate. Since the threaded hole 52 on the protective clip 5 is threadedly connected to the threaded rod 21, the protective clip 5 moves up and down along the sliding groove 20 of the support column 2. Throughout the process, the distance between the protective clip 5 and the lifting platform remains constant. Both ends of the platform body 3 always extend into the slots 50 at the top of the protective clip 5. The guide shaft 51 at the top of the slot 50 is inserted into the platform body 3, ensuring the relative position of the platform body 3 and the protective clip 5 is stable, so that the protective clip 5 can follow the platform's movement in real time and is always in an effective protective state.

[0036] Fall Protection Status: When the lifting platform falls due to a malfunction, the servo motor 22 stops driving, the threaded rod 21 stops rotating, and the protective clip 5 immediately stops moving due to the self-locking characteristic of the threaded transmission. At this time, the falling platform body 3 falls rapidly, and the slot 50 of the protective clip 5 supports both ends of the platform body 3, preventing it from falling further, playing a key role in fall prevention. At the same time, during the descent of the protective clip 5, if it reaches the bottom limit position of the sliding groove 20, the buffer spring 27, buffer block 23, damping rod 26, and magnet 25 on the top of the support block 28 work together. The buffer spring 27 first contacts and absorbs part of the impact force; the buffer block 23 slides with the limit post 24, dispersing the impact force and limiting the displacement of the buffer block 23; the damping rod 26 absorbs the impact energy, slows down the rebound speed of the buffer block 23, and avoids secondary impact; the magnet 25 on the top of the buffer block 23 and the bottom of the protective clip 5 repel each other, providing additional buffering force, further reducing the impact force, and comprehensively protecting the safety of the platform body 3 and the equipment and personnel in the elevator shaft.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. Anti-falling protection device for a lifting platform, characterized in that: The utility model provides an elevator platform body (3) and the base (1) of fixed connection in the elevator shaft up and down movement, base (1) top four corners are all fixedly connected with a support column (2), opposite two support columns (2) between being equipped with a protection card (5), the protection card (5) is located platform body (3) below, the protection card (5) top is equipped with a card groove (50), the both ends of platform body (3) near protection card (5) respectively extend into two card grooves (50), the sliding slot (20) of protection card (5) up and down movement is equipped with on support column (2), the sliding slot (20) is rotatably installed with a threaded rod (21), the protection card (5) is equipped with the threaded hole (52) of screw thread connection with threaded rod (21), the support column (2) top is installed with the servo motor (22) of output shaft and the coaxial fixation of threaded rod (21).

2. The fall protection apparatus for an elevator platform of claim 1, wherein: The lifting platform is installed on the lifting elevator, and the distance between the protection card (5) and the lifting platform remains unchanged during the up and down movement of the lifting platform.

3. The fall protection apparatus for an elevator platform of claim 2, wherein: The top of the card slot (50) is symmetrically fixedly connected with two guide shafts (51), and the guide shafts (51) are inserted into the platform body (3).

4. The fall protection apparatus for an elevator platform of claim 3, wherein: The bottom of the sliding slot (20) is fixedly connected with a support block (28), and the top of the support block (28) is fixedly connected with a buffer spring (27).

5. The fall protection apparatus for an elevator platform of claim 4, wherein: The top of the buffer spring (27) is fixedly connected with a buffer block (23), and the bottom of the threaded rod (21) is coaxially integrally formed with a limiting column (24), and the buffer block (23) is slidably connected with the limiting column (24).

6. The fall protection apparatus for an elevator platform of claim 5, wherein: The top of the support block (28) is fixedly connected with a damping rod (26), and the piston rod of the damping rod (26) is fixedly connected with the bottom of the buffer block (23).

7. The fall protection apparatus for an elevator platform of claim 6, wherein: The top of the buffer block (23) and the bottom of the protection card (5) are fixedly connected with a magnet (25), and the two magnets (25) repel each other.

8. The fall protection apparatus for an elevator platform of claim 7, wherein: A limiting groove (240) is formed on the circumferential outer wall of the limiting column (24), and a limiting protrusion (230) is integrally formed in the buffer block (23) and slidably connected with the limiting groove (240).

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