A transport trolley and its fall protection device

Abstract

This utility model relates to a transport trolley and its anti-fall device in the field of safety devices for automatic parking equipment. It includes a support seat, a first elastic element, and a check valve assembly. The support seat has a hook at its upper outer surface. A sling pulley is rotatably connected to the center of the support seat's cavity. The support seat has an opening at least above the sling pulley for the hoisting cable to pass through. A shaft hole is located in the lower middle part of the support seat, near its inner side, for rotatably connecting the support seat to the end of the transport trolley's crossbeam. One end of the first elastic element is pulled to the lower outer surface of the support seat, and the other end is used to connect to a structural component of the transport trolley. The check valve assembly includes a pad. This utility model ingeniously integrates the anti-fall structure and the lifting device structure into a single unit. It automatically implements anti-fall action the instant the hoisting cable breaks, with rapid response, reliable operation, and an extremely simple mechanism. This significantly improves the safety factor of the transport trolley while effectively reducing manufacturing costs.

Description

Technical Field

[0001] This utility model relates to the field of safety devices for automatic parking equipment, specifically to a transport trolley and its anti-fall device. Background Technology

[0002] Lift-and-slide automated parking systems are large, complex, and highly redundant rigid frame structures, requiring high reliability and safety. Therefore, their design specifically considers various potential safety risks, including the possibility of sling breakage (such as chains and wire ropes). To prevent serious falls in such extreme circumstances, a series of specialized fall protection measures are typically implemented.

[0003] For example, announcement number CN205502684U provides a structurally sound lifting and traversing type multi-level parking garage fall protection device, including a fall protection hook connected to a frame, a connecting rod connected to a vehicle platform, and an L-shaped lever. The L-shaped lever is connected to the frame via a hinge shaft, and its side has outward protrusions. The connecting rod is positioned by a positioning pin mounted on a fixed sleeve and a U-shaped groove on a positioning plate on the vehicle platform. The crank arm of the L-shaped lever has a sliding groove, and the corner of the L-shaped lever is hinged to the aforementioned positioning plate via a rotating shaft. Although this type of redundant suspension fall protection system has a relatively simple structure, it performs poorly in terms of responsiveness and technical effectiveness. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a transport trolley and its anti-fall device.

[0005] According to the present invention, a falling prevention device for a transport trolley includes a support seat, a first elastic element, and a backflow prevention component.

[0006] The upper part of the outer side of the support seat is provided with a hook head, and a sling pulley is rotatably connected to the middle of the cavity of the support seat. The support seat is provided with an opening for the lifting steel cable to pass through, at least above the sling pulley. A shaft hole is provided in the lower middle part of the support seat and towards the inner side of the support seat. The shaft hole is used for the support seat to be rotatably connected to the end of the crossbeam of the transport trolley. One end of the first elastic member is pulled to the lower end of the outer side of the support seat, and the other end of the first elastic member is used to connect with the structural component of the transport trolley. The anti-return assembly includes a pad block.

[0007] In normal operation, the lifting cable drives the support seat to move up and down or remain static via the cable pulley. The support seat drives the transport trolley to move synchronously. The elastic element is stretched and tensioned, and the end face of the pad abuts against the lower end of the inner side of the support seat. When the lifting cable breaks, the first elastic element pulls the support seat to rotate outward around the shaft hole. After rotating a predetermined angle, the hook head hooks the anti-fall block connected to the slide rail. The anti-return component drives the pad block to enter below the support seat and make contact with it, preventing the support seat from rotating inward.

[0008] In some embodiments, the frame body of the support seat includes a support plate, a base plate, and a tension plate. The support plate is an integral inclined plate body that slopes outward. The base plate is connected to the bottom of two parallel support plates spaced a predetermined distance apart. The upper end of the outer side of each support plate extends outward to form the hook. The tension plate is connected to the lower part of the outer side of the two support plates and is connected to the elastic element.

[0009] In some embodiments, the support seat is further provided with a reinforcing plate, which is attached to the inner side of the hook head.

[0010] In some embodiments, the check valve assembly further includes a housing and a second elastic member, the main body of the pad is located inside the housing, and the two ends of the second elastic member are respectively connected to the housing and the pad;

[0011] In normal operation, the pad contacts the base plate and presses against the second elastic element. When the lifting cable breaks, the bearing seat rotates outward under the drive of the first elastic element, and the second elastic element drives the pad to extend outward and contact the base plate.

[0012] In some embodiments, the pad has an inclined surface that is used to contact the lower surface of the base plate.

[0013] This utility model also provides a transport trolley, which adopts the aforementioned anti-fall device for the transport trolley and further includes a support frame and a bridge box;

[0014] The support frame is a rectangular structural frame, which includes an upper crossbeam, a lower crossbeam, and traveling pulleys. A set of traveling pulleys is connected to each end of the lower crossbeam. Two sets of support seats are rotatably connected to each end of the upper crossbeam. The anti-return component is connected to the upper surface of the upper crossbeam near the support position. The other end of the elastic element is connected to the lower crossbeam.

[0015] The bridge box has an overall U-shaped structure. The two sets of support frames are respectively connected to the two ends of the bridge box in an I-shape. Under normal operation, the traveling pulley is used to move up and down along the vertical track. When the lifting cable breaks, the first elastic element pulls the support seat to rotate outward around the shaft hole. After rotating a predetermined angle, the hook head hooks the anti-fall block connected to the slide. The anti-return component drives the pad block to enter below the support seat and make contact with it, preventing the support seat from rotating inward.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The anti-fall device for the transport trolley provided by this utility model ingeniously integrates the anti-fall structure and the lifting structure into one integrated structure. It can automatically implement the anti-fall action the moment the lifting steel cable breaks. It reacts quickly, acts reliably, and has a simple mechanism. It greatly improves the safety factor of the transport trolley while effectively reducing manufacturing costs. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the assembly structure of the anti-fall lifting device of this utility model installed on a transport trolley;

[0020] Figure 2 This is a schematic diagram of the assembly structure of the fall protection lifting device and the support frame of this utility model;

[0021] Figure 3 This is a three-dimensional structural diagram of the load-bearing seat of this utility model from a frontal view.

[0022] Figure 4 This is a rear-view perspective three-dimensional structural diagram of the load-bearing seat of this utility model;

[0023] Figure 5 This is a schematic diagram of the working state of the fall arrestor under normal conditions of this utility model;

[0024] Figure 6 This is a schematic diagram of the working state of the anti-fall lifting device when the lifting cable of this utility model is broken.

[0025] Figure 7 This is a schematic diagram of the overall structure of the transport trolley of this utility model installed on an automated parking system.

[0026] Figure 8 for Figure 1 A magnified structural diagram of part A; Detailed Implementation

[0027] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention. Example

[0028] This embodiment provides a fall prevention device for a transport trolley, referring to... Figure 1-6 As shown, it mainly includes a support seat 1, a first elastic element 2, and a check valve assembly 3. The support seat 1 is used to rotatably connect to the corresponding structural component of the transport trolley. The lifting cable lifts the transport trolley through the support seat 1 and drives the transport trolley to move up and down synchronously. Through cooperation with the first elastic element 2 and the check valve assembly 3, when the lifting cable breaks, the structural component located on the support seat 1 can be hooked in time onto the anti-fall block on the track for the transport trolley to slide up and down.

[0029] Reference Figure 3-4 As shown, the main body of the support seat 1 is a box-shaped structure, mainly composed of a support plate 14, a bottom plate 15, and a tension plate 16. The support plate 14 is an inclined plate with an outward slope. This inclined plate does not only include regular parallelogram structures but also irregular polygonal structures, such as the inclined plate structure used in this embodiment, which has a rectangular bottom and an irregular, outwardly inclined upper part. A hook 11 extends outward from the upper end of the outer surface of the support plate 14. The hook 11 is used to hook onto the anti-fall block 62 located on the slide after the lifting cable breaks. In some embodiments, a reinforcing plate 17 is also connected to the inner side of the hook 11. The surface of the reinforcing plate 17 is larger than that of the hook 11, and it is attached to the inner side of the hook 11 while extending inward to effectively increase the impact resistance and load-bearing capacity of the hook 11. The reinforcing plate 17 can be connected to the inner side of the hook 11 by welding or integral molding. Two support plates 14 are parallel to each other and spaced at a predetermined distance, and are connected and fixed together by at least one connecting block 18. A base plate 15 is connected between the two support plates 14 to form a bottom limiting structure. A tension plate 16 is connected between the two support plates 14 and located at the lower part of the outer side of the support seat 1. One end of the first elastic element 2 is connected to the lower end of the tension plate 16. The first elastic element 2 is a compression spring, the upper end of which hooks onto the tension hole opened at the lower end of the tension plate 16, and the lower end of which is used to hook onto the corresponding structural component of the transport trolley. Specifically, in this embodiment, the lower end of the first elastic element 2 is connected to the lower crossbeam of the transport trolley. Under normal operating conditions of the transport trolley, the first elastic element 2 is stretched and is in a tensioned state. In some embodiments, the lower part of the tension plate 16 extends to below the bottom of the support plate 14, which prevents the first elastic element 2 from being stretched too long.

[0030] A sling pulley 12 is rotatably connected between two support plates 14. The rotatable connection point between the sling pulley 12 and the support plate 14 is located in the middle of the support plate 14, behind the traction plate 16. That is, in the horizontal direction, the traction plate 16 is located between the hook head 11 and the rotatable connection point between the sling pulley 12 and the support plate 14. The support plate 14 is provided with shaft holes 13 that are rotatably connected to the structural components of the transport trolley. In this embodiment, these structural components are the two ends of the upper crossbeam of the transport trolley. Two load-bearing seats 1 are rotatably connected to the ends of the upper crossbeam through the shaft holes 13. The shaft holes 13 are located in the lower middle part of the support plate 14 and are close to the inner side of the support plate 14. The inner side of the support plate is relative to the outer side of the support plate 14 where the hook head 11 is located.

[0031] The check valve assembly 3 mainly consists of a pad 31, a housing 32 housing the pad 31, and a second elastic element 33 that drives the pad 31 to move horizontally. The housing 32 is a rectangular block structure with an opening on one side. The second elastic element 33 is a tension spring, with one end connected to the inner side plate of the housing 32 and the other end connected to the rear end of the pad 31 located inside the housing 32. The front end of the pad 31 extends out from the opening of the housing 32. When the check valve assembly 3 is used in conjunction with the support seat 1, the installation and fixing position of its housing 32 is located at the lower end of the inner side of the support seat 1, specifically, at the inner side of the base plate 15. For example, in this embodiment, when the support seat 1 is rotatably connected to the end of the upper crossbeam of the support frame of the transport trolley, the housing 32 is installed on the upper surface of the upper crossbeam of the support frame of the transport trolley. Under normal conditions, the front end of the pad 31 abuts against the rear end of the base plate 15, and the second elastic element 33 is compressed.

[0032] The working principle of the anti-fall device for the transport trolley provided in this embodiment is briefly described as follows:

[0033] The anti-fall device is used as follows: the lifting steel cable passes through the lifting cable pulley 12 located in the bearing seat 1 to lift the transport trolley. The lifting steel cable is driven by the external drive mechanism, which causes the traveling pulleys on both sides of the transport trolley to slide up and down along the track. The track is provided with anti-fall blocks 62 at intervals from top to bottom.

[0034] Reference Figure 5As shown, during normal operation, the lifting cable drives the lifting cable pulley 12, causing the support seat 1 to move up and down or remain stationary. The support seat 1 then drives the transport trolley to move up and down synchronously. Since the rotational connection point between the support seat 1 and the transport trolley is located behind the rotational connection point of the lifting cable pulley 12, and this rotational connection point is the force-bearing point of the lifting cable, the force applied by the lifting cable causes the support seat 1 to rotate inwards around the shaft hole 13. Because the base plate 15 contacts the upper surface of the upper crossbeam of the transport trolley's support frame, it has a limiting effect, allowing the support seat 1 to be lifted or lowered in a vertical position. At this time, the first elastic element 2 is in a stretched state, while the second elastic element 33 is compressed by the pad 31 that abuts against the rear end face of the base plate 15.

[0035] Reference Figure 6 As shown, when the lifting cable breaks, the external force applied to the cable pulley 12 disappears. Under the tension of the first elastic element 2, the support seat 1 rotates outward with the shaft hole 13 as the rotation point. After rotation, the bottom plate of the support seat 1 tilts up, causing the pad 31 to move horizontally outward under the thrust of the second elastic element 33. After the support seat 1 rotates by a predetermined angle, the hook 11 located at the upper outer side of the support seat 1 engages with the anti-fall block 62 located on the slide. After the hook 11 engages with the anti-fall block, the pad 33 is pushed to the bottom plate 15 and contacts it. The pad 33 then prevents the support seat 1 from rotating due to the engagement of the hook 11 with the anti-fall block, ensuring the stability of the hook 11 and the anti-fall block. Preferably, the pad 33 has an inclined surface, which remains in contact with the lower surface of the tilted bottom plate 15.

[0036] The anti-fall device for the transport trolley provided in this embodiment cleverly integrates the anti-fall structure and the lifting device structure into one integrated structure. It can automatically implement the anti-fall action the moment the lifting steel cable breaks. It reacts quickly, acts reliably, and has a simple mechanism. It greatly improves the safety factor of the transport trolley while effectively reducing manufacturing costs. Example

[0037] This embodiment 2 is a transport trolley developed based on embodiment 1, and adopts the anti-fall device for the transport trolley described in embodiment 1, with reference to... Figure 1-2As shown, it also includes a support frame 4 and a bridge box 5. The bridge box 5 has an overall U-shaped structure and is used to move the vehicle platform laterally, allowing empty or loaded vehicle platforms to enter or leave the parking garage. The support frame 4 is a rectangular frame structure, consisting of two sets, which are respectively fastened to both ends of the bridge box 5 along its length to form an overall I-shaped structure. The anti-fall devices for the transport trolley are installed at both ends of the upper crossbeam of the support frame 4. The lifting steel cable, in coordination with the rotation of the lifting cable pulley 12, suspends the transport trolley 5 vertically and drives it to move up and down, thereby allowing the bridge box 5 to reach each level of the automated parking garage.

[0038] The support frame 4 is mainly a rectangular frame structure formed by an upper crossbeam 41, a lower crossbeam 42, and uprights and diagonal supports connecting the two. A set of traveling pulleys 43 are connected to both ends of the lower crossbeam 42. The traveling pulleys 43 are used to slide in conjunction with the vertical tracks in the automated parking system, allowing the transport trolley to slide vertically up and down along four tracks via the four sets of traveling pulleys 43. Two sets of support seats 1 are rotatably connected to both ends of the upper crossbeam 41. The connection method is that the end of the upper crossbeam 41 is provided with a connecting ear plate 411, the upper end of which is higher than the upper surface of the crossbeam. The upper end of the connecting ear plate 411 is provided with a pin hole that mates with the shaft hole 13, and the support seat 1 is rotatably connected to the connecting ear plate 411 via a pin. After the support seat 1 is rotatably connected to the connecting lug 411, under normal lifting conditions, the lower surface of its base plate 15 is in contact with the upper surface of the upper crossbeam 41, and the base plate 15 has the function of restricting the support seat 1 from rotating inward. The upper end of the first elastic element 2 is connected to the tension plate 16, and its lower end is connected to the lower crossbeam 42. Under normal operating conditions, the first elastic element 2 is stretched. The housing 32 of the pad assembly 3 is fixedly connected to the upper crossbeam 41 and close to the support seat 1. Under normal conditions, the front end of the pad 31 abuts against the rear end face of the base plate 15, and the second elastic element 33 is compressed. Example

[0039] This embodiment 3 provides a three-dimensional parking garage, which uses the transport trolley described in embodiment 2 and also includes a frame 6.

[0040] Reference Figure 7-8 As shown, the frame 6 is mainly a frame structure formed by columns 61 and crossbeams and diagonal supports connecting the columns 61. The cross-section of the column 61 is H-shaped, and the traveling pulley 41 slides up and down along the groove on the inner side of the column 61. Multiple anti-fall blocks 62 are arranged at intervals from top to bottom in the groove on the inner side of the column 61. When the lifting steel cable breaks, the hook 11 hooks onto the anti-fall block 62.

[0041] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A fall arrest device for a handling vehicle, characterized in that It includes a bearing seat (1), a first elastic element (2), and a check valve assembly (3); The upper part of the outer side of the bearing seat (1) is provided with a hook (11). The middle part of the cavity of the bearing seat (1) is rotatably connected to a sling pulley (12). The bearing seat (1) is provided with an opening for the lifting steel cable to pass through, at least above the sling pulley (12). The bearing seat (1) is provided with a shaft hole (13) located in the lower part of the bearing seat (1) and close to the inner side of the bearing seat (1). The shaft hole (13) is used for the bearing seat (1) to be rotatably connected to the end of the crossbeam of the transport trolley. One end of the first elastic member (2) is pulled to the lower end of the outer side of the bearing seat (1). The other end of the first elastic member (2) is used to connect with the structural components of the transport trolley. The check valve assembly (3) includes a pad (31). In normal operation, the lifting cable drives the support seat (1) to move up and down or remain static through the cable pulley (12). The support seat (1) drives the transport trolley to move synchronously. The elastic element (2) is stretched and tightened. The end face of the pad (31) abuts against the lower end of the inner side of the support seat (1). When the lifting cable breaks, the first elastic element (2) pulls the support seat (1) to rotate outward around the shaft hole (13). After rotating a predetermined angle, the hook (11) hooks the anti-fall block (62) connected to the slide. The anti-return component (3) drives the pad (31) to enter below the support seat (1) and make contact with it, preventing the support seat (1) from rotating inward.

2. The fall arrest device of claim 1, wherein, The main frame of the support seat (1) includes a support plate (14), a bottom plate (15), and a tension plate (16). The support plate (14) is an integral inclined plate body that tilts outward. The bottom plate (15) is connected to the bottom of two parallel support plates (14) spaced at a predetermined distance. The upper end of the outer side of each support plate (14) extends outward to form the hook (11). The tension plate (16) is connected to the lower part of the outer side of the two support plates (14). The tension plate (16) is connected to the first elastic member (2).

3. The fall arrest device of claim 1, wherein, The support seat (1) is also provided with a reinforcing plate (17), which is attached to the inner side of the hook (11).

4. The fall arrest device of claim 2, wherein, The check valve assembly (3) also includes a housing (32) and a second elastic element (33). The main body of the pad (31) is located inside the housing (32), and the two ends of the second elastic element (33) are respectively connected to the housing (32) and the pad (31). In normal operation, the pad (31) contacts the base plate (15) and presses against the second elastic element (33). When the lifting cable breaks, the bearing seat (1) rotates outward under the drive of the first elastic element (2), and the second elastic element (33) drives the pad (31) to extend into the base plate (15) and contact it.

5. The fall arrest device of claim 2, wherein, The pad (31) has an inclined surface, which is used to contact the lower surface of the base plate (15).

6. A handling dolly characterized by The anti-fall device for the transport trolley as described in any one of claims 1-5 further includes a support frame (4) and a bridge box (5). The support frame (4) is a rectangular structure frame. The support frame (4) includes an upper crossbeam (41), a lower crossbeam (42), and a traveling pulley (43). The lower crossbeam (42) is connected to a set of traveling pulleys (43) at both ends. Two sets of support seats (1) are rotatably connected to the upper crossbeam (41) at both ends. The upper surface of the upper crossbeam (41) and near the support seat (1) are connected to the anti-return component (3). The other end of the elastic element (2) is connected to the lower crossbeam (42). The bridge box (5) has a U-shaped structure. The two sets of support frames (4) are respectively connected to the two ends of the bridge box (5) in an I-shape. Under normal operation, the traveling pulley (43) is used to move up and down along the vertical track. When the lifting cable breaks, the first elastic element (2) pulls the support seat (1) to rotate outward with the shaft hole (13) as the center. After rotating a predetermined angle, the hook (11) hooks the anti-fall block (62) connected to the slide. The anti-return component (3) drives the pad (31) to enter the support seat (1) and contact it, preventing the support seat (1) from rotating inward.

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