Fall arrest device and hoisting apparatus

Abstract

The application relates to a kind of anti-falling device and lifting equipment, and the anti-falling device is used for lifting equipment, and the lifting equipment includes transmission shaft that can rotate around preset axis, and the anti-falling device includes limiting wheel, mounting base and limiting structure.Limiting structure has opening position and closing position, opening position, limiting component of limiting structure is separated from limiting wheel to allow limiting wheel and transmission shaft to rotate around preset axis.Closing position, limiting component cooperates with limiting wheel to limit limiting wheel and transmission shaft to rotate around preset axis.Operators can actively switch limiting structure to closing position by control according to maintenance requirements, so that limiting component and limiting wheel form mechanical cooperation, and the rotation freedom of transmission shaft is blocked at the physical level;Safety control is changed from passive response to active control, to avoid unexpected drop of lifting mechanism, and to improve safety and reliability during operation and maintenance.

Description

Technical Field

[0001] This application relates to the field of material handling technology, and in particular to a fall protection device and a lifting device. Background Technology

[0002] In the field of material handling technology, machines with lifting equipment are often used to sort products stored at different heights. During long-term operation, in order to ensure the safety of machine use, anti-fall mechanisms are designed into the lifting equipment to prevent accidental drops.

[0003] Existing anti-fall mechanisms for lifting equipment mostly rely on passive response after accidents such as breakage of traction components, using the weight of the structural components to achieve locking. Not only is the locking trigger delayed, but it also cannot reliably fix the lifting mechanism in advance in scenarios requiring active locking, such as maintenance, which can easily lead to the lifting mechanism falling unexpectedly, posing a great threat to the personal safety of maintenance personnel and the safety of equipment and property. Utility Model Content

[0004] Therefore, it is necessary to provide a fall arrestor and lifting device that can actively lock, thereby improving safety and reliability during operation and maintenance.

[0005] This utility model first provides a fall protection device for lifting equipment. The lifting equipment includes a drive shaft capable of rotating around a preset axis, comprising: a limiting wheel for mounting on the drive shaft; a mounting base; and a limiting structure mounted on the mounting base. The limiting structure includes a control component and a limiting assembly. The control component is connected to the limiting assembly and can drive the limiting assembly to reciprocate along a first preset direction. The limiting structure has an open position and a closed position. In the open position, the limiting assembly is separated from the limiting wheel to allow the limiting wheel and the drive shaft to rotate around the preset axis. In the closed position, the limiting assembly cooperates with the limiting wheel to restrict the rotation of the limiting wheel and the drive shaft around the preset axis.

[0006] This design, with the limit wheel and drive shaft rotating synchronously, allows for direct intervention in the rotational motion. The reciprocating motion of the limit component along a first preset direction forms the basis of active control. Operators can actively switch the limit structure to the closed position via the control components according to maintenance needs, enabling the limit component and limit wheel to form a mechanical engagement, physically blocking the rotational freedom of the drive shaft. This transforms safety control from passive response to active control, preventing the lifting mechanism from falling unexpectedly and improving safety and reliability during operation and maintenance.

[0007] In one embodiment, the limiting wheel has a limiting hole on its outer periphery. In the closed position, the limiting component can extend into the limiting hole to restrict the limiting wheel from rotating around the preset axis.

[0008] With this configuration, the hole-shaft mating limiting method can directly prevent the rotation of the limiting wheel. The locking structure is simple and highly accurate, and the contact area between the limiting component and the limiting hole is concentrated, resulting in more uniform force distribution.

[0009] In one embodiment, the control component is configured as a handheld component, which is rotatably mounted on the mounting base. The limiting structure further includes a transmission assembly, and the handheld component and the limiting assembly are connected by the transmission assembly.

[0010] With this configuration, the handheld component provides the operator with a direct operating part, which can drive the movement of the limiting component without the need for additional tools, thus improving the ease of operation; the transmission component converts the rotational motion of the handheld component into the reciprocating motion of the limiting component, and the transmission structure is simple.

[0011] In one embodiment, the transmission assembly includes a swing member, a first pin, and a second pin. The two ends of the swing member are rotatably connected to the handheld member and the limiting assembly respectively via the first pin and the second pin. In the open position and / or closed position, the line connecting the center of the first pin and the center of the second pin is collinear with the central axis of the limiting assembly.

[0012] With this configuration, when the center line connecting the first and second pins is collinear with the central axis of the limiting component, the force on the limiting component along the central axis will be transmitted through the line connecting the two pins. At this time, the rotational torque of this force on the handpiece is zero, so that the handpiece cannot be driven to rotate by external force, thus achieving dual self-locking in both the open and closed positions.

[0013] In one embodiment, the fall arrestor further includes a sensor switch disposed on the mounting base; in the open position, the sensor switch is triggered by the handheld component to allow the limiting wheel and the drive shaft to rotate around the preset axis, or in the closed position, the sensor switch is triggered by the handheld component to restrict the limiting wheel and the drive shaft from rotating around the preset axis.

[0014] With this configuration, the inductive switch ensures that the lifting equipment can only be permitted to operate when the limit component reaches a specific open position, forming two lines of defense; the design of the handheld component directly triggering the inductive switch ensures that the working status of the fall arrestor is completely synchronized with the signal feedback of the inductive switch.

[0015] In one embodiment, the fall arrestor further includes an elastic buckle disposed on the mounting base, and a sensor switch disposed on the elastic buckle. In the open state, the handheld component engages with the elastic buckle and triggers the sensor switch.

[0016] With this configuration, the elastic buckle forms a mechanical engagement with the handheld component when it is open, providing additional fixation and effectively resisting interference during equipment operation. The induction switch is located on the elastic buckle, so that the induction switch is triggered when the handheld component engages with the elastic buckle, achieving synchronization between mechanical fixation and electrical signal sensing.

[0017] In one embodiment, the limiting component further includes a movable member, a limiting member, and an elastic member. The movable member is slidably disposed on the mounting base along the first preset direction. The limiting member is slidably disposed on the movable member along the first preset direction and is capable of engaging / disengaging with the limiting wheel. The elastic member is disposed between the limiting member and the elastic member and is capable of applying a force toward the limiting wheel to the limiting member.

[0018] With this configuration, even if the limiting member is not properly aligned with the limiting hole of the limiting wheel, the clamping force of the elastic member can make the limiting member tightly abut against the outer circumferential surface of the limiting wheel, generating resistance to the rotation of the limiting wheel, slowing down its rotation speed, and pushing the limiting member into the limiting hole when the limiting wheel continues to rotate until the limiting member is aligned with the limiting hole.

[0019] In one embodiment, the limiting member is a sleeve extending along the first preset direction, the sleeve being sleeved on the outside of the moving member, and the elastic member is a compression spring extending along the first preset direction, the two ends of the compression spring abutting against the moving member and the limiting member respectively.

[0020] With this configuration, the limiting component and the moving component form a coaxial nested structure, which is compact and ensures that the limiting component slides stably along the first preset direction, thus improving the locking accuracy. The extension and retraction direction of the compression spring is consistent with the sliding direction of the limiting component, ensuring that the force applied to the limiting component toward the limiting wheel is stable and directional.

[0021] In one embodiment, one of the limiting member and the moving member is provided with a limiting groove that extends along the first preset direction, and the other is provided with a limiting part that can reciprocate within the limiting groove.

[0022] With this configuration, the reciprocating motion range of the limiting part within the limiting groove is limited, restricting the sliding stroke of the limiting member relative to the moving member, thus structurally preventing the limiting member from moving excessively.

[0023] This utility model also provides a lifting device, including the aforementioned anti-fall device. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a partial structural diagram of the fall protection device provided in this application.

[0026] Figure 2 This is a partial structural diagram of the lifting device provided in this application in its open state.

[0027] Figure 3 This is a partial structural diagram of the lifting equipment in the off state provided in this application.

[0028] Reference numerals: 1. Control component; 2. Transmission assembly; 21. Swinging component; 22. First pin; 23. Second pin; 3. Limiting assembly; 31. Moving component; 32. Limiting component; 321. Limiting groove; 33. Elastic component; 34. Limiting part; 4. Mounting base; 5. Inductive switch; 6. Elastic buckle; 7. Limiting wheel; 71. Limiting hole; 200. Transmission shaft. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0034] In the field of material handling technology, machines with lifting devices are often used to sort products stored at different heights. During long-term operation, to ensure the safety of the machine, anti-fall mechanisms are designed into the lifting devices to prevent accidental drops. Existing anti-fall mechanisms for lifting devices mostly rely on passive response after accidents such as broken traction components, using the structural components' own weight to achieve locking. This not only has a delayed locking trigger but also cannot reliably secure the lifting mechanism in advance during maintenance or other scenarios requiring active locking. This can easily lead to accidental drops of the lifting mechanism, posing a significant threat to the personal safety of maintenance personnel and the safety of equipment and property.

[0035] To solve the above problems, such as Figures 1 to 3 As shown, this utility model discloses a fall prevention device and a lifting device that can actively lock, improving safety and reliability during operation and maintenance.

[0036] like Figures 1 to 3As shown, this application provides a fall arrestor for lifting equipment. The lifting equipment includes a drive shaft 200 capable of rotating around a preset axis. The fall arrestor includes a limiting wheel 7, a mounting base 4, and a limiting structure. The limiting wheel 7 is mounted on the drive shaft 200. The limiting structure is mounted on the mounting base 4 and includes a control element 1 and a limiting component 3. The control element 1 is connected to the limiting component 3 and can drive the limiting component 3 to reciprocate along a first preset direction. The limiting structure has an open position and a closed position. In the open position, the limiting component 3 is separated from the limiting wheel 7 to allow the limiting wheel 7 and the drive shaft 200 to rotate around the preset axis. In the closed position, the limiting component 3 cooperates with the limiting wheel 7 to restrict the rotation of the limiting wheel 7 and the drive shaft 200 around the preset axis.

[0037] This configuration, with the limit wheel 7 rotating synchronously with the drive shaft 200, allows for direct intervention in the rotational motion. The reciprocating motion of the limit component 3 along a first preset direction forms the basis of active control. Operators can actively switch the limit structure to the closed position via control element 1 according to maintenance needs, causing the limit component 3 and the limit wheel 7 to mechanically engage, thereby physically blocking the rotational freedom of the drive shaft 200—a locked state. This transforms safety control from passive response to active control, preventing accidental descent of the lifting mechanism and improving safety and reliability during operation and maintenance. Specifically, the limit wheel 7 rotates synchronously with the drive shaft 200, ensuring that any external force attempting to rotate the drive shaft 200 acts directly on the limit wheel 7. The engagement between the limit component 3 and the limit wheel 7 in the closed position converts this rotational torque into internal stress within the limit component 3. This stress is perpendicular to the central axis of the limit component 3, thus preventing any component force that would cause it to retract, achieving reliable rotational locking.

[0038] like Figures 1 to 3 As shown, in one embodiment, the limiting wheel 7 has a limiting hole 71 on its outer periphery. In the closed position, the limiting component 3 can extend into the limiting hole 71 to restrict the limiting wheel 7 from rotating around a preset axis. With this configuration, the limiting hole 71 provides a precise positioning and mating point for the limiting component 3. In the closed position, the limiting component 3 extends into the limiting hole 71, forming a rigid locking structure with hole-shaft engagement. Compared to surface contact or tooth meshing, the hole-shaft engagement limiting method can more directly prevent the rotational movement of the limiting wheel 7. The locking structure is simple and more precise. Furthermore, the contact area between the limiting component 3 and the limiting hole 71 is concentrated, resulting in more uniform force distribution. This can avoid component damage caused by excessive local stress and effectively prevent the limiting component 3 from shifting in the locked state, ensuring the stability of the locking effect.

[0039] In the illustrated embodiment, multiple circular limiting holes 71 are evenly distributed around the outer periphery of the limiting wheel 7. The limiting holes 71 are arranged radially along the limiting wheel 7. In the closed position, the cylindrical head of the limiting component 3 can extend into the circular limiting hole 71 to restrict the rotation of the limiting wheel 7 around a preset axis. With this arrangement, the multiple evenly distributed circular limiting holes 71 can ensure that the limiting component 3 can quickly find the corresponding limiting hole 71 to lock when the anti-fall device is closed, regardless of the rotation angle of the limiting wheel 7, thus improving the convenience and fault tolerance of locking. The contact between the circular limiting hole 71 and the cylindrical head is a surface contact, resulting in uniform force distribution, which can disperse the impact force during locking and reduce component wear. The radial arrangement of the limiting holes 71 allows the limiting component 3 to extend radially into the locking position, perpendicular to the rotation tangent direction of the limiting wheel 7. This makes the transmission of locking force more direct and the locking effect more reliable, avoiding the force dispersion caused by oblique contact.

[0040] In another embodiment, the shape of the limiting hole 71 can be a square, a triangle, or other regular or irregular shape, and the number and extension direction of the limiting hole 71 can be designed according to actual needs.

[0041] In another embodiment, depending on actual needs, the limiting component 3 and the limiting wheel 7 can be designed with other limiting structures such as tooth surface meshing, keyway fit, or clamping fit.

[0042] like Figures 1 to 3As shown, in one embodiment, the control component 1 is a handheld component, rotatably mounted on the mounting base 4. The limiting structure also includes a transmission assembly 2, and the handheld component and the limiting assembly 3 are connected by the transmission assembly 2. Specifically, from the open position to the closed position, the limiting assembly 3 moves towards the limiting wheel 7 via the transmission assembly 2, thus restricting the rotation of the limiting wheel 7 and the transmission shaft 200 around a preset axis. Conversely, from the closed position to the open position, the limiting assembly 3 moves away from the limiting wheel 7 via the transmission assembly 2, thus allowing the limiting wheel 7 and the transmission shaft 200 to rotate around the preset axis. This configuration provides the operator with a direct operating component, allowing the limiting assembly 3 to move without additional tools, simplifying the operation of the fall arrestor, improving ease of operation, and facilitating quick locking and unlocking during maintenance. Furthermore, the rotatable handheld component on the mounting base 4 allows the operator to switch states simply by rotating the handheld component, making the operation ergonomic, effortless, and convenient. The transmission component 2 converts the rotational motion of the handheld component into the reciprocating motion of the limiting component 3. This transmission structure is simple, highly efficient, and the rotating connection reduces frictional loss between components, extending the mechanism's service life. The design of the movement direction from the open to the closed position ensures that the movement trajectory of the limiting component 3 precisely aligns with the limiting wheel 7, guaranteeing accurate engagement and reliable locking in the closed position. Conversely, in the open position, it completely moves away from the limiting wheel 7, avoiding interference with its rotation. This transmission structure further optimizes the connection between operation and transmission, enabling the driving force of the handheld component to be efficiently transmitted to the limiting component 3, improving the ease of operation and transmission reliability of the fall arrestor. The handheld component is a long, narrow handle.

[0043] In another implementation, the handheld component can be designed as a push-pull rod, knob, or press button, depending on actual needs.

[0044] like Figures 1 to 3As shown, in one embodiment, the transmission assembly 2 includes a swing member 21, a first pin 22, and a second pin 23. The two ends of the swing member 21 are rotatably connected to the handheld component and the limiting assembly 3 via the first pin 22 and the second pin 23, respectively. In both the open and closed positions, the line connecting the center of the first pin 22 and the center of the second pin 23 is collinear with the central axis of the limiting assembly 3. With this configuration, when the line connecting the centers of the first pin 22 and the second pin 23 is collinear with the central axis of the limiting assembly 3, the force acting on the limiting assembly 3 along the central axis direction is transmitted through the line connecting the two pins. At this time, the rotational torque of this force on the handheld component is zero, ensuring that the handheld component can only be controlled to rotate when the user actively applies force, thereby achieving dual self-locking in both the open and closed positions. The self-locking mechanism in the open position effectively prevents the handheld component from accidentally rotating due to uncontrollable factors such as vibration and external impact during equipment operation. It also prevents the limit component 3 from moving towards the limit wheel 7 and causing accidental locking, ensuring the continuous and stable operation of the lifting equipment. The self-locking mechanism in the closed position ensures a stable engagement between the limit component 3 and the limit wheel 7. Even under the reaction force of the limit wheel 7 or external vibration, the limit component 3 will not accidentally disengage, guaranteeing a consistently reliable locking effect. This provides stable safety for maintenance personnel, especially in maintenance scenarios. This self-locking design further optimizes the performance of the transmission component 2, enabling the fall arrestor to maintain structural stability in both operating states, thus improving overall safety and reliability.

[0045] In another embodiment, the transmission assembly 2 includes a swing member 21, a first pin 22, and a second pin 23. The two ends of the swing member 21 are rotatably connected to the handheld member and the limiting assembly 3 via the first pin 22 and the second pin 23, respectively. In either the open or closed position, the line connecting the center of the first pin 22 and the center of the second pin 23 is collinear with the central axis of the limiting assembly 3.

[0046] Among them, the swing component 21 is a single straight rod structure.

[0047] In another embodiment, the swing member 21 can be designed as a single bent or multi-link structure.

[0048] In another embodiment, the transmission component 2 can be designed as other transmission structures such as gears and racks.

[0049] like Figures 1 to 3As shown, in one embodiment, the fall arrestor also includes an inductive switch 5 mounted on the mounting base 4. In the open position, the inductive switch 5 is triggered by a handheld component, allowing the limit wheel 7 and the drive shaft 200 to rotate around a preset axis. An electrical interlock is established between the inductive switch 5 and the limit structure's linkage triggering mechanism. When the limit structure does not reach the predetermined open position, the inductive switch 5 cannot be triggered, and the control system of the hoisting equipment will receive a signal prohibiting operation. This electromechanical dual interlock effectively reduces the risk of user misoperation. The layout of the inductive switch 5 mounted on the mounting base 4 separates the switch body from the moving parts, reducing the impact of vibration and impact on the switch's stability, while also facilitating wiring and maintenance. Specifically, the cooperation between the limit component 3 and the limit wheel 7 in the closed position constitutes the first mechanical defense, and the triggering state of the inductive switch 5 constitutes the second electrical defense. The two defenses form redundant protection; even if one fails, the other can still prevent the hoisting equipment from operating dangerously. Furthermore, the logic that allows rotation after the inductive switch 5 is triggered ensures that the lifting equipment can only be permitted to operate when the limit component 3 reaches a specific open position. This deterministic signal transmission eliminates the uncertainty of traditional gravity triggering mechanisms, further improving safety and reliability during operation and maintenance.

[0050] Meanwhile, the design of the handheld device directly triggering the inductive switch 5 ensures that the working state of the fall protection device is completely synchronized with the signal feedback of the inductive switch 5, avoiding inconsistencies between the state and the signal due to transmission delays or component wear. For example, the equipment is allowed to operate only when the handheld device triggers the inductive switch 5 in the open position, and the equipment is prohibited from operating when the handheld device triggers the inductive switch 5 in the closed position, forming a precise safety control logic to further ensure operational safety. Specifically, in the open position, the handheld device is vertical and presses against the inductive switch 5. After the inductive switch 5 is triggered, the limit wheel 7 and the drive shaft 200 are allowed to rotate around the preset axis. In the closed position, the handheld device is horizontal and detached from the inductive switch 5. The inductive switch 5 is not triggered and restricts the rotation of the limit wheel 7 and the drive shaft 200 around the preset axis.

[0051] Alternatively, the inductive switch 5 can be configured such that when in the closed position, the inductive switch 5 is triggered to limit the rotation of the limit wheel 7 and the drive shaft 200 around a preset axis. When the limit assembly 3 has not reached the predetermined open position, the inductive switch 5 remains in the triggered state, and the control system of the lifting equipment will receive a signal to prohibit operation.

[0052] like Figures 1 to 3As shown, in one embodiment, the fall arrestor further includes an elastic buckle 6, which is disposed on the mounting base 4. A sensor switch 5 is disposed on the elastic buckle 6. In the open state, the handheld component engages with the elastic buckle 6 and triggers the sensor switch 5. In the illustrated embodiment, the elastic buckle 6 includes a protrusion 61. In the open state, the protrusion 61 engages with the handheld component to prevent it from disengaging from the open state. This configuration allows the protrusion 61 of the elastic buckle 6 to mechanically engage with the handheld component in the open state, providing additional fixing constraints on the handheld component 1. This effectively resists strong vibrations and external impacts during equipment operation, preventing accidental rotation of the handheld component from causing the fall arrestor to switch states and ensuring stability in the open state. The sensor switch 5, disposed on the elastic buckle 6, triggers the sensor switch 5 simultaneously with the handheld component engaging with the elastic buckle 6, achieving synchronization of mechanical fixing and electrical signal sensing. The sensor switch 5 is only triggered when the handheld component is fully engaged in the open position of the elastic buckle 6, allowing the equipment to operate. This avoids the risk of accidental equipment startup when the handheld component is not fully in place, improving the safety of equipment operation. The elasticity of the snap-fit ​​6 makes it easy to engage and disengage the handheld component. Only a certain force is needed to switch states without affecting ease of operation. At the same time, the snap-fit ​​6 has a simple structure, low cost, and is easy to install and maintain. The design of the handheld component trigger induction switch 5 further optimizes the reliability of the induction trigger. The mechanical snap-fit ​​ensures the stability of the handheld component's position, thereby ensuring the continuous stability of the trigger signal of the induction switch 5 and avoiding interruption or false triggering of the induction signal due to slight displacement of the handheld component.

[0053] like Figures 1 to 3As shown, in one embodiment, the limiting component 3 further includes a movable member 31, a limiting member 32, and an elastic member 33. The movable member 31 is slidably disposed on the mounting base 4 along a first preset direction. The limiting member 32 is slidably disposed on the movable member 31 along the first preset direction and can engage or disengage with the limiting wheel 7. The elastic member 33 is disposed between the limiting member 32 and the limiting member 32 and can apply a force toward the limiting wheel 7 to the limiting member 32. With this configuration, the movable member 31 provides sliding support and guidance for the limiting member 32, ensuring stable movement of the limiting member 32 along the first preset direction and preventing the limiting member 32 from shifting and failing to engage with the limiting wheel 7. The elastic element 33 is disposed between the moving element 31 and the limiting element 32, and can continuously apply a clamping force towards the limiting wheel 7 to the limiting element 32. When the fall arrestor is switched to the closed position, if the limiting element 32 is not properly aligned with the limiting hole 71 of the limiting wheel 7, the clamping force of the elastic element 33 can make the limiting element 32 tightly abut against the outer circumferential surface of the limiting wheel 7, generating resistance to the rotation of the limiting wheel 7 and slowing down its rotation speed, thus buying time for the limiting element 32 to align with the limiting hole 71. When the limiting wheel 7 continues to rotate until the limiting element 32 aligns with the limiting hole 71, the elastic force of the elastic element 33 will quickly push the limiting element 32 into the limiting hole 71, completing the self-locking correction, avoiding locking failure due to the limiting element 32 not aligning with the limiting hole 71, and significantly improving the reliability and fault tolerance of the locking. The structure of the limiting component 3 optimizes the locking process, combining active locking with elastic compression correction to further improve the safety performance of the fall arrestor; the moving part 31 moves under the drive of the handheld part and the swinging part 21, and the limiting part 32 achieves precise cooperation under the action of the elastic part 33, making the connection between transmission and locking smoother.

[0054] like Figures 1 to 3As shown, in one embodiment, the limiting member 32 is a sleeve extending along a first preset direction, sleeved on the outside of the moving member 31, and the elastic member 33 is a compression spring extending along the first preset direction, with both ends of the compression spring abutting against the moving member 31 and the limiting member 32 respectively. This arrangement, with the sleeve-shaped limiting member 32 sleeved on the outside of the moving member 31, forms a coaxial nested structure, which is compact and occupies little space. Simultaneously, the coaxial design ensures stable sliding of the limiting member 32 along the first preset direction, preventing offset or wobbling during movement and improving locking accuracy. The compression spring, as the elastic member 33, extends along the first preset direction, and its extension and retraction direction is consistent with the sliding direction of the limiting member 32, efficiently transmitting elastic force and ensuring that the force applied to the limiting member 32 towards the limiting wheel 7 is stable and directionally accurate. The two ends of the compression spring abut against the moving part 31 and the limiting part 32 respectively, making installation simple and requiring no additional fixing structure. The extension and retraction of the compression spring can adapt to the sliding stroke of the limiting part 32. When the limiting part 32 is not aligned with the limiting hole 71 of the limiting wheel 7, the compression spring is in a compressed state, providing continuous clamping force to make the limiting part 32 abut against the limiting wheel 7. When aligned, the elastic potential energy of the compression spring is released, quickly pushing the limiting part 32 into the limiting hole 71 to complete the locking. This design further optimizes the structural compactness and movement stability of the limiting assembly 3. The nested fit between the sleeve and the moving part 31 effectively protects the internal compression spring, preventing dust and impurities from entering and causing the spring to jam or corrode, thus extending the service life of the elastic part 33. Furthermore, the end of the sleeve-shaped limiting part 32 can be designed to fit the limiting hole 71, improving the locking fit and stability.

[0055] In another embodiment, the elastic element 33 can be designed as other elastic structures such as pneumatic or hydraulic springs.

[0056] like Figures 1 to 3As shown, in one embodiment, one of the limiting member 32 and the moving member 31 is provided with a limiting groove 321 extending along a first preset direction, and the other is provided with a limiting part 34 capable of reciprocating within the limiting groove 321. This configuration forms a mechanical limiting structure with the limiting groove 321 and the limiting part 34. By limiting the reciprocating range of the limiting part 34 within the limiting groove 321, the sliding stroke of the limiting member 32 relative to the moving member 31 is restricted, structurally preventing the limiting member 32 from detaching from the moving member 31 due to excessive movement and avoiding failure of the locking function. This limiting structure effectively prevents the elastic element 33 from being over-compressed. When the limiting element 32 slides towards the limiting wheel 7, the limiting part 34 forms a block at the end of the limiting groove 321, preventing the elastic element 33 from undergoing permanent deformation or breakage due to excessive compression, thus extending the service life of the elastic element 33. Simultaneously, the length design of the limiting groove 321 ensures that the limiting element 32 retains sufficient sliding stroke to meet the normal expansion and contraction requirements of the elastic element 33, without affecting the transmission of clamping force to the limiting element 32. This ensures that when the limiting element 32 is not aligned with the limiting hole 71, the elastic element 33 applies a spring force to the limiting element 32 to press it against the limiting wheel 7, and when the limiting element 32 is aligned with the limiting hole 71, it is pushed into the limiting hole 71 by the spring force of the elastic element 33 and locked in place. Furthermore, this limiting structure requires no additional power; limiting can be completed solely through mechanical cooperation, making the structure simple and reliable.

[0057] This application also provides a lifting device including the aforementioned fall arrestor. With this configuration, the lifting device integrates multiple safety functions such as active locking, self-locking, and elastic correction by incorporating the fall arrestor, thus overcoming the limitations of existing lifting devices that rely on passive fall arrest. In maintenance scenarios, the operator drives the limit component 3 to the closed position using a handheld device. The self-locking structure then secures the limit component 3. Even if the limit component 3 is not aligned with the limit hole 71, the elastic element 33 can push the limit component 32 to press against the limit wheel 7, automatically locking it once aligned, thus preventing the lifting device from accidentally falling. In normal operation scenarios, the elastic buckle 6 secures the handheld device in the open position, and the sensor switch 5 sends a signal to the control system, ensuring that the lifting device is only started when the fall arrestor is not locked, avoiding the risk of misoperation.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A fall arrestor for lifting equipment, the lifting equipment comprising a drive shaft (200) rotatable about a preset axis, characterized in that, include: A limiting wheel (7) is used to be mounted on the drive shaft (200). Mounting base (4); as well as, A limiting structure is provided on the mounting base (4). The limiting structure includes a control component (1) and a limiting component (3). The control component (1) is connected to the limiting component (3) and can drive the limiting component (3) to reciprocate along a first preset direction. The limiting structure has an open position and a closed position. In the open position, the limiting component (3) is separated from the limiting wheel (7) to allow the limiting wheel (7) and the drive shaft (200) to rotate around the preset axis; in the closed position, the limiting component (3) cooperates with the limiting wheel (7) to restrict the limiting wheel (7) and the drive shaft (200) from rotating around the preset axis.

2. The fall arrestor according to claim 1, characterized in that, The limiting wheel (7) has a limiting hole (71) on its outer periphery. In the closed position, the limiting component (3) can extend into the limiting hole (71) to restrict the limiting wheel (7) from rotating around the preset axis.

3. The fall arrestor according to claim 1, characterized in that, The control component (1) is configured as a handheld component, which is rotatably mounted on the mounting base (4). The limiting structure also includes a transmission component (2), and the handheld component and the limiting component (3) are connected by transmission through the transmission component (2).

4. The fall arrestor according to claim 3, characterized in that, The transmission assembly (2) includes a swing member (21), a first pin (22) and a second pin (23). The two ends of the swing member (21) are rotatably connected to the handheld member and the limiting assembly (3) through the first pin (22) and the second pin (23), respectively. In the open and / or closed positions, the line connecting the center of the first pin (22) and the center of the second pin (23) is collinear with the central axis of the limiting assembly (3).

5. The fall arrestor according to claim 3, characterized in that, The fall protection device also includes an induction switch (5) disposed on the mounting base (4); In the open position, the sensor switch (5) is triggered by the handpiece to allow the limiting wheel (7) and the drive shaft (200) to rotate around the preset axis; or, in the closed position, the sensor switch (5) is triggered by the handpiece to restrict the limiting wheel (7) and the drive shaft (200) from rotating around the preset axis.

6. The fall arrestor according to claim 5, characterized in that, The fall arrestor also includes an elastic buckle (6), which is disposed on the mounting base (4). The inductive switch (5) is disposed on the elastic buckle (6). In the open state, the handpiece engages with the elastic buckle (6) and triggers the inductive switch (5).

7. The fall arrestor according to claim 1, characterized in that, The limiting component (3) further includes a movable component (31), a limiting component (32), and an elastic component (33). The movable component (31) is slidably disposed on the mounting base (4) along the first preset direction. The limiting component (32) is slidably disposed on the movable component (31) along the first preset direction and can cooperate / separate with the limiting wheel (7). The elastic component (33) is disposed between the limiting component (32) and the elastic component (33) and can apply a force toward the limiting wheel (7) to the limiting component (32).

8. The fall arrestor according to claim 7, characterized in that, The limiting member (32) is a sleeve extending along the first preset direction. The sleeve is sleeved on the outside of the moving member (31). The elastic member (33) is a compression spring extending along the first preset direction. The two ends of the compression spring abut against the moving member (31) and the limiting member (32) respectively.

9. The fall arrestor according to claim 7, characterized in that, One of the limiting member (32) and the moving member (31) is provided with a limiting groove (321) which extends along the first preset direction, and the other is provided with a limiting part (34) which can reciprocate within the limiting groove (321).

10. A lifting device, characterized in that, Includes the fall arrest device according to any one of claims 1-9.

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