Anti-falling mechanism and lifting device provided with same

Abstract

The utility model relates to the technical field of carrying machinery, and provides an anti-falling mechanism and a lifting device provided with the anti-falling mechanism. The anti-falling mechanism comprises an assembling base, a limiting column and a limiting wheel. The assembling base is provided with a first bearing part and a second bearing part, and the first bearing part and the second bearing part are arranged at an interval in the vertical direction; the limiting column is movably connected to the assembling base and provided with a locking position and an unlocking position. The limiting wheel is connected with a transmission mechanism; the limiting column can be limited to the first bearing part or the second bearing part so as to switch the locking position and the unlocking position. At the locking position, the limiting column is in limiting connection with the limiting wheel, and at the unlocking position, the limiting column and the limiting wheel are unlocked. According to the anti-falling mechanism provided by the invention, the falling risk of the elevator during maintenance is reduced, and the use safety is improved.

Description

Technical Field

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

[0002] Elevator lifts are automated picking carts that can replace manual labor for intelligent multi-level storage and sorting. Due to their high degree of automation and unmanned picking capabilities, they have become an important component of intelligent picking and assembly, and are widely used in warehousing, logistics, and other industries, significantly improving production efficiency, reducing production costs, and increasing storage space. However, elevator lifts require regular maintenance and upkeep after long-term use, and safety during maintenance is a key concern for users.

[0003] In related technologies, a fall protection mechanism is typically installed between the traction assembly and the lifting platform. The traction assembly includes multiple traction chains. When a traction chain breaks, a rotating block in the fall protection mechanism flips towards the lifting platform under its own gravity, causing a protrusion on the rotating block to engage with a latch on a guide column, thus achieving a fall protection effect. While this design can provide some fall protection, it relies on the possibility of a broken traction chain and still carries some risk of damage. Furthermore, if the precision of the fit between the protrusion and the latch decreases, there is a significant risk of a fall. Utility Model Content

[0004] Therefore, it is necessary to provide a fall protection mechanism to reduce the risk of falls during the maintenance and upkeep of the elevator and improve its safety.

[0005] A fall protection mechanism is provided for connection to an elevator, the elevator including a lifting platform and a transmission mechanism connected to the lifting platform and used to drive the lifting platform to move up and down. The fall protection mechanism includes an assembly base, a limiting post, and a limiting wheel. The assembly base has a first bearing portion and a second bearing portion, which are arranged at intervals along a vertical direction. The limiting post is movably connected to the assembly base and has a locked position and an unlocked position. The limiting wheel is used to connect to the transmission mechanism. The limiting post can be limited to either the first bearing portion or the second bearing portion to switch between the locked and unlocked positions. In the locked position, the limiting post is limited to the limiting wheel; in the unlocked position, the limiting post is released from the limiting wheel.

[0006] In other words, by utilizing the limiting engagement of the first and second load-bearing parts relative to the limiting post, the limiting post can be kept stable in both the locked and unlocked positions, thereby reducing the risk of detachment or deviation and further improving safety. Simultaneously, throughout the fall protection process, only the engagement position of the limiting post relative to the first and second load-bearing parts needs to be adjusted. This eliminates the risk of breakage of other structures, reducing costs, and also eliminates the need to consider the weight of the limiting post, making operation safer and more reliable. It provides effective fall protection during elevator maintenance and upkeep. Furthermore, this fall protection mechanism has a simple structure and is easy to install and maintain.

[0007] In one embodiment, the distance between the first bearing portion and the limiting wheel is smaller than the distance between the second bearing portion and the limiting wheel in the vertical direction; in the locked position, the limiting post is located on the first bearing portion; in the unlocked position, the limiting post is located on the second bearing portion.

[0008] In one embodiment, the assembly base includes a base body and a limiting block; the base body is provided with a first bearing portion; the limiting block is connected to the base body, at least a portion of the limiting block protrudes vertically from the base body, and a second bearing portion is provided on the protruding portion; wherein, the base body and / or the limiting block are provided with a through-channel extending vertically, the limiting post passes through the through-channel, and is capable of moving axially along the through-channel and rotating about the axis of the limiting post to switch the locking position and the unlocking position.

[0009] In one embodiment, the limiting block has a slot on the protruding portion, and the slot forms the second bearing portion; in the unlocked position, a portion of the limiting post is engaged in the slot.

[0010] In one embodiment, the seat body includes an assembly part and a limiting platform connected to the assembly part. The through-channel is provided on the limiting platform. The side of the limiting platform opposite to the limiting wheel forms the first bearing part. The limiting block protrudes from the side of the limiting platform opposite to the limiting wheel in the vertical direction. In the locked position, a portion of the limiting post overlaps with the second limiting part.

[0011] In one embodiment, the limiting post is provided with a limiting stop; the assembly base also includes an elastic element connected between the base body and the limiting stop, for applying a force toward the limiting wheel to the limiting post.

[0012] In one embodiment, the assembly base further includes a guide block connected to the base body, the guide block having a guide channel for the limiting post to pass through, the guide channel being coaxially arranged with the passing channel.

[0013] In one embodiment, the limiting post includes a column body and an operating shaft connected to the column body, which are set at an angle. The column body is movably connected to the assembly base, and the operating shaft can be limited and engaged with the first bearing part or the second bearing part.

[0014] In one embodiment, the limiting wheel includes a wheel body and a plurality of limiting portions disposed on the wheel body. The plurality of limiting portions are arranged at intervals along the circumference of the wheel body and can be selectively connected to the limiting post for limiting. The wheel body is used to connect to the transmission mechanism.

[0015] This application also provides a lifting device, including a lifting frame and the aforementioned anti-fall mechanism, wherein the anti-fall mechanism is installed on the lifting frame; wherein the lifting platform is slidably connected to the lifting frame, the transmission mechanism is installed on the lifting frame and includes a transmission shaft and a transmission belt assembly connected to the transmission shaft, the transmission belt assembly is connected to the lifting platform, and the limiting wheel is connected to the transmission shaft. Attached Figure Description

[0016] 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.

[0017] Figure 1 A schematic diagram of a lifting device provided in an embodiment of this application;

[0018] Figure 2 This is a first partial schematic diagram of a lifting device provided in an embodiment of this application;

[0019] Figure 3 for Figure 2 A schematic diagram showing the limit pin in the locked position in the provided crash arrestor;

[0020] Figure 4 for Figure 2 A schematic diagram showing the limit post in the unlocked position in the crash arrestor system;

[0021] Figure 5 A schematic diagram of a fall protection mechanism provided in one embodiment of this application;

[0022] Figure 6This is a partial schematic diagram of the limiting post in a fall arrest mechanism provided in an embodiment of this application.

[0023] Reference numerals: 100, anti-fall mechanism; 110, assembly base; 111, base body; 112, limiting block; 113, guide block; 114, elastic element; 120, limiting post; 121, column body; 122, operating shaft; 123, limiting platform; 124, insertion end; 130, limiting wheel; 131, wheel body; 132, limiting part; 140, sensor; 200, elevator; 210, transmission mechanism; 211, transmission shaft; 212, transmission belt assembly; 220, lifting platform; 230, elevator frame; 1101, first bearing part; 1102, second bearing part; 1110, through passage; 1111, assembly part; 1112, limiting platform; 1121, limiting protrusion; 1131, guide passage. Detailed Implementation

[0024] 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.

[0025] It should be noted that when a component is referred to as being "fixed to" or "attached to" 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] In related technologies, lifts typically include a fall arrest mechanism, usually connected between the traction assembly and the lifting platform, to maintain the platform's fall prevention effect. The traction assembly comprises multiple traction chains connected between the lifting platform and the lift frame. When a traction chain breaks, a rotating block in the fall arrest mechanism flips towards the lifting platform under its own weight, causing a protrusion on the rotating block to insert into a slot on a guide post, thus achieving the fall arrest effect. While this setup meets fall arrest requirements, its effectiveness depends on the traction chain breaking and the rotating block flipping under its own weight to insert into the slot. If the rotating block experiences wobbling or vibration during the flipping process, causing the protrusion to shift relative to the slot, it may not accurately insert to achieve the fall arrest, and the risk of falling remains. Furthermore, the breakage of the traction chain inevitably incurs costs and losses.

[0030] In response to this, such as Figure 1 and Figure 2 As shown, one embodiment of this application provides a fall protection mechanism 100 that meets fall protection requirements without requiring structural damage or destruction, reduces the risk of the elevator 200 falling during maintenance and upkeep, and improves operational safety. Furthermore, this fall protection mechanism 100 reduces costs and extends service life. The fall protection mechanism 100 is described in detail below.

[0031] It should be noted in advance that, if Figure 1 and Figure 2As shown, the elevator 200 includes a lifting platform 220 and a transmission mechanism 210 connected to the lifting platform 220. The transmission mechanism 210 drives the lifting platform 220 to move back and forth in the vertical direction (that is, the up and down direction).

[0032] Please see Figures 2 to 5 In some embodiments, the fall arrestor 100 includes an assembly base 110, a limiting post 120, and a limiting wheel 130. The assembly base 110 has a first support portion 1101 and a second support portion 1102, which are spaced apart vertically. The limiting post 120 is movably connected to the assembly base 110 and has a locked position and an unlocked position. The limiting wheel 130 is used to connect to the transmission mechanism 210. The limiting post 120 can be limited to either the first support portion 1101 or the second support portion 1102 to switch between the locked and unlocked positions. In the locked position, the limiting post 120 is limitedly connected to the limiting wheel 130; in the unlocked position, the limiting post 120 is released from the limiting wheel 130.

[0033] The limiting post 120 is positioned at the first bearing part 1101 as the locking position, and the limiting post 120 is positioned at the second bearing part 1102 as the unlocking position.

[0034] When the limit post 120 is in the locked position, it is connected to the limit wheel 130. Since the limit wheel 130 is connected to the transmission mechanism 210, it is equivalent to the limit post 120 being connected to the transmission mechanism 210 through the limit wheel 130, thereby restricting the operation of the transmission mechanism 210 and stopping its lifting drive on the lifting platform 220, keeping the lifting platform 220 stationary. When the limit post 120 is in the unlocked position, the limit post 120 and the limit wheel 130 are released from their limiting positions, thus releasing the limiting relationship with the transmission mechanism 210. The transmission mechanism 210 can then operate normally to drive the lifting platform 220 to rise and fall.

[0035] In this process, by utilizing the limiting engagement of the first bearing part 1101 and the second bearing part 1102 relative to the limiting post 120, the limiting post 120 can be kept in a stable state in both the locked and unlocked positions, thereby reducing the risk of the limiting post 120 disengaging or deviating and further improving safety. Simultaneously, throughout the entire fall protection process, only the engagement position of the limiting post 120 relative to the first bearing part 1101 and the second bearing part 1102 needs to be adjusted. This eliminates the risk of breakage of other structures, reducing costs, and also eliminates the need to consider the gravity of the limiting post 120, making operation safer and more reliable. It provides effective fall protection during the maintenance and upkeep of the elevator 200. Furthermore, this fall protection mechanism 100 has a simple structure and is easy to install and maintain.

[0036] Therefore, when the elevator 200 needs maintenance or upkeep, the lifting drive needs to be stopped. At this time, the limit column 120 can be adjusted to move to the locking position and be limited to the first bearing part 1101 to maintain the stability of the position of the limit column 120. The limit column 120 is limited to the limit wheel 130, thereby limiting the lifting of the elevator platform 220 and preventing the elevator platform 220 from falling during maintenance or upkeep, thus improving the safety of the elevator 200 during use.

[0037] Please see Figures 3 to 5 Furthermore, in the vertical direction, the distance between the first bearing portion 1101 and the limiting wheel 130 is smaller than the distance between the second bearing portion 1102 and the limiting wheel 130. In the locked position, the limiting post 120 is limited to the first bearing portion 1101; in the unlocked position, the limiting post 120 is limited to the second bearing portion 1102. Due to this arrangement, when the limiting post 120 is limited to the first bearing portion 1101, the engagement length of the limiting post 120 relative to the limiting wheel 130 increases, enabling effective limiting engagement with the limiting wheel 130 and improving connection reliability. Conversely, when the limiting post 120 is limited to the second bearing portion 1102, the limiting post 120 disengages from the limiting wheel 130, maintaining a safe distance between them and preventing interference between the limiting post 120 and the transmission mechanism 210.

[0038] In some specific embodiments, when both the first support portion 1101 and the second support portion 1102 are located above the limiting wheel 130, the first support portion 1101 is located below the second support portion 1102, maintaining a vertical distance between the first support portion 1101 and the limiting wheel 130 that is less than the vertical distance between the second support portion 1102 and the limiting wheel 130. Conversely, when both the first support portion 1101 and the second support portion 1102 are located below the limiting wheel 130, the first support portion 1101 is located above the second support portion 1102. The goal is simply to maintain the limiting post 120 within the first support portion 1101 in the locked state, ensuring a limiting connection between the limiting post 120 and the limiting wheel 130, thus preventing falls.

[0039] Please see Figures 3 to 5 In some embodiments, the mounting base 110 includes a base body 111 and a limiting block 112. The base body 111 has a first bearing portion 1101; the limiting block 112 is connected to the base body 111, at least a portion of the limiting block 112 protrudes vertically from the base body 111, and a second bearing portion 1102 is provided on the protruding portion. The base body 111 and / or the limiting block 112 have a through-channel 1110 extending vertically, and a limiting post 120 passes through the through-channel 1110 and is capable of axial movement along the through-channel 1110 and rotation about the axis of the limiting post 120 to switch between a locked position and an unlocked position.

[0040] Understandably, the seat body 111, as the foundation of the entire assembly base 110, stably supports the limiting block 112 and the limiting post 120. The seat body 111 can typically be installed on the lifting frame 230 of the lifting platform 200 to ensure the stability of the fall arrest mechanism 100 during the operation of the lifting platform 200. The protrusion of the limiting block 112 relative to the seat body 111 ensures that the first bearing part 1101 and the second bearing part 1102 are spaced apart in the vertical direction, facilitating the switching of the limiting position of the limiting post 120. The axis of the through channel 1110 is vertical, which is equivalent to the limiting post 120 moving up and down in the vertical direction, and cooperating with the rotation of the limiting post 120 around its own axis to satisfy the position adjustment of the limiting post 120 relative to the first bearing part 1101 and the second bearing part 1102, realizing the limiting connection or release of the limiting wheel 130. The cooperation between the through-channel 1110 and the limiting post 120 provides a precise movement path for the limiting post 120, ensuring that the limiting post 120 can smoothly switch between the locked and unlocked positions, and preventing the limiting post 120 from deviating or getting stuck during the movement.

[0041] Alternatively, the limiting post 120 can be rotatably connected to the mounting base 110 via a pin. The pin is connected to the middle, near the middle, or far from the limiting wheel 130 of the limiting post 120. The limiting post 120 can pitch and swing around the axis of the pin, thereby switching between the locking and unlocking positions through clockwise and counterclockwise rotation of the limiting post 120. When the limiting post 120 swings towards the limiting wheel 130, it switches to the locking position; conversely, when the limiting post 120 swings away from the limiting wheel 130, it switches to the unlocking position.

[0042] Please see Figures 3 to 5 Furthermore, the seat body 111 includes an assembly part 1111 and a limiting platform 1112 connected to the assembly part 1111. A through-channel 1110 is provided on the limiting platform 1112, and a first bearing part 1101 is formed on the side of the limiting platform 1112 opposite to the limiting wheel 130. A limiting block 112 protrudes from the limiting platform 1112 on the side of the limiting platform 1112 opposite to the limiting wheel 130 in the vertical direction. In the locked position, a portion of the limiting post 120 overlaps with the first bearing part 1101. Taking the example where both the first bearing part 1101 and the second bearing part 1102 are located above the limiting wheel 130 in the vertical direction, that is, the assembly base 110 is located above the limiting wheel 130. In this embodiment, only the seat body 111 has the through-channel 1110.

[0043] Assembly part 1111 is connected to the lifting frame 230 to facilitate the assembly of the fall arrest mechanism 100 with respect to the lifting platform 200. Assembly part 1111 extends vertically to ensure sufficient assembly range with the lifting frame 230 and improve connection reliability. Limiting platform 1112 is angled to assembly part 1111 to enhance the structural strength of the base body 111. Limiting block 112 is connected to limiting platform 1112 and is positioned opposite and spaced apart from assembly part 1111. For example, assembly part 1111 and limiting block 112 are located on opposite sides of limiting platform 1112 along the thickness direction of limiting block 112 and are respectively fixed to limiting platform 1112 with screws. Assembly part 1111 may include a base plate and mounting sheet metal connected to the base plate. Mounting sheet metal is screwed to lifting frame 230, base plate is screwed to mounting sheet metal, and limiting platform 1112 may be welded to base plate. This is just an example; it only needs to satisfy the connection requirements and improve the structural strength.

[0044] Alternatively, the limiting block 112 can be L-shaped, with its horizontal side connected to the limiting platform 1112 in the base body 111 and having a through-passage channel 1110. A second bearing portion 1102 is provided at the end of the vertical side facing away from the horizontal side; that is, both the base body 111 and the limiting block 112 have through-passage channels 1110. Alternatively, the horizontal side of the L-shaped limiting block 112 can be connected to the assembly portion 1111 of the base body 111, and the horizontal side is parallel to the limiting platform 1112 in the horizontal direction. The through-passage channel 1110 is located on the horizontal side, and the first bearing portion 1101 is located on the limiting platform 1112; that is, only the limiting block 112 has the through-passage channel 1110. It is sufficient that the limiting post 120 and the assembly base 110 can be movably connected.

[0045] Please see Figures 3 to 5 In some specific embodiments, the limiting block 112 has a groove on its protruding portion, forming a second supporting portion 1102; in the unlocked position, a portion of the limiting post 120 is engaged within the groove. That is, by using the groove to limit the limiting post 120, the limiting post 120 is stably confined to the second supporting portion 1102, maintaining the stability of the limiting post 120's position; moreover, this design can also prevent accidental detachment or displacement caused by external forces to a certain extent. Furthermore, the groove design also facilitates the limiting post 120 to quickly and accurately return to the locked position when needed, thereby ensuring the reliability and response speed of the entire fall arrest mechanism 100.

[0046] The slot is provided through the thickness of the limiting block 112, which facilitates the partial locking of the limiting post 120 in the slot. Furthermore, one side of the slot is provided with an opening, and the limiting block 112 is provided with a vertically protruding limiting protrusion 1121 at the opening of the slot to limit the limiting post 120 and prevent the limiting post 120 from detaching from the opening of the slot.

[0047] Please continue reading. Figures 3 to 5 In some embodiments, the assembly base 110 further includes a guide block 113 connected to the base body 111, and the guide block 113 has a guide channel 1131 through which the limiting post 120 passes, and the guide channel 1131 and the through channel 1110 are coaxially arranged. That is to say, by using the guide block 113 and the guide channel 1131 thereon, the movement of the limiting post 120 in the vertical direction is guided, and then cooperates with the through channel 1110 to improve the movement accuracy of the limiting post 120, thereby improving the cooperation accuracy between the limiting post 120 and the limiting wheel 130, which is conducive to the timely and accurate cooperation between the limiting post 120 and the limiting wheel 130, and further improves the fall protection safety.

[0048] The guide block 113 and the limiting platform 1112 are arranged vertically at intervals, and the guide block 113 is located between the limiting platform 1112 and the limiting wheel 130. The guide block 113 is welded to the assembly part 1111 or connected with screws, etc. At least two guide blocks 113 are provided and arranged vertically at intervals to improve the guiding effect.

[0049] In actual use, the guide channel 1131 is equipped with a guide bushing or a linear bearing, which cooperates with the limit post 120 to further improve the moving guidance effect.

[0050] Please see Figures 3 to 6 In some embodiments, the limiting post 120 is provided with a limiting stop 123. The mounting base 110 also includes an elastic element 114, which is connected between the base body 111 and the limiting stop 123, and is used to apply a force toward the limiting wheel 130 to the limiting post 120. That is, one end of the elastic element 114 abuts against the limiting platform 1112 of the base body 111, and the other end abuts against the limiting stop 123 on the limiting post 120 and is in a compressed state, so that a force toward the limiting wheel 130 is always applied to the limiting post 120 through the limiting stop 123.

[0051] By utilizing the elastic element 114, when the limiting post 120 switches from the unlocked position to the locked position, it facilitates timely engagement between the limiting post 120 and the limiting wheel 130, improving engagement efficiency. Furthermore, the elastic element 114 can also provide a certain buffering effect to reduce vibration between the limiting wheel 130 and the limiting post 120.

[0052] When the limiting post 120 is switched to the unlocked position, the limiting post 120 moves upward and engages with the second bearing part 1102, reducing the distance between the limiting stop 123 and the limiting platform 1112 on the limiting post 120, thus increasing the compression of the elastic element 114. When the limiting post 120 is switched to the locked position, the limiting post 120 moves downward and engages with the first bearing part 1101, increasing the distance between the limiting stop 123 and the limiting platform 1112, releasing the elastic element 114, and thus applying a downward force to the limiting post 120 through the limiting stop 123, facilitating timely engagement between the limiting post 120 and the limiting wheel 130.

[0053] In some specific embodiments, the limiting stop 123 is arranged around the outer periphery of the limiting post 120, and the elastic element 114 is a spring, which is sleeved on the outside of the limiting post 120. This arrangement can also use the limiting post 120 to guide the elastic element 114 during assembly, reducing the amount of skewing of the elastic element 114 during compression or release.

[0054] Please continue reading. Figures 3 to 6 In some embodiments, the limiting post 120 includes a post body 121 and an operating shaft 122 connected to the post body 121, the two being angled together. The post body 121 is movably connected to the assembly base 110, and the operating shaft 122 can engage with either the first bearing portion 1101 or the second bearing portion 1102. It is understood that because the limiting post 120 can rotate around its own axis, the position of the operating shaft 122 in the horizontal plane can be adjusted, thereby facilitating a possible engagement with either the first bearing portion 1101 or the second bearing portion 1102. The operating shaft 122 can be inserted into a slot (i.e., the second bearing portion 1102), or it can overlap the upper surface of the limiting platform 1112 (i.e., the first bearing portion 1101). Furthermore, the design of the operating shaft 122 facilitates gripping by the operator, thereby enabling axial movement and rotation of the limiting post 120. One end of the column 121 that is away from the operating shaft 122 is connected to the limit wheel 130 for a limit connection.

[0055] The upper surface of the limiting platform 1112 may also be provided with a boss to position and cooperate with the operating shaft 122.

[0056] Furthermore, the operating shaft 122 is fastened to the column 121 by screws, welding, or adhesive. Alternatively, the operating shaft 122 and the column 121 are integrally formed.

[0057] Please see Figures 3 to 5In some embodiments, the limiting wheel 130 includes a wheel body 131 and a plurality of limiting portions 132 disposed on the wheel body 131. The plurality of limiting portions 132 are arranged at intervals along the circumference of the wheel body 131 and can be selectively connected to the limiting post 120 for limiting. The wheel body 131 is used to connect to the transmission mechanism 210. It can be understood that the multiple limiting portions 132 are arranged at intervals along the circumference of the wheel body 131, so that the limiting wheel 130 can be connected to the limiting post 120 at different positions, thereby achieving precise control of the movement of the elevator 200. At the same time, the setting of multiple limiting portions 132 also increases the reliability and durability of the limiting connection. Even if one limiting portion 132 wears or fails, the other limiting portions 132 can still continue to function, ensuring the normal operation of the elevator 200.

[0058] Furthermore, the limiting post 120 and the limiting part 132 are inserted for limiting. This configuration is not only simple in structure and easy to implement, but also provides a stable connection, effectively preventing relative displacement between the limiting post 120 and the limiting part 132 during lifting, thereby ensuring the stability and safety of the elevator 200.

[0059] like Figure 3 and Figure 4 As shown, in some specific embodiments, the wheel body 131 has a wheel surface, and the limiting part 132 is a limiting groove recessed in the wheel surface. Each limiting groove is selectively engaged with the limiting post 120. That is, by selectively engaging the limiting post 120 with one of the multiple limiting grooves, the limiting post 120 and the limiting wheel 130 are limited and connected. The end of the post 121 facing away from the operating shaft 122 is provided with an insertion end 124, and the end of the insertion end 124 is tapered, which facilitates the smooth and precise insertion of the limiting post 120 into the limiting groove. Moreover, precisely because of the setting of the limiting groove, that is, the limiting wheel 130 has no protruding structure, not only is the safety of the limiting wheel 130 improved, but assembly interference between the limiting wheel 130 and other structures is also reduced.

[0060] Alternatively, the limiting part 132 can be an insert protrusion with a wheel surface. In this case, the end of the limiting post 120 is provided with a limiting groove, and multiple insert protrusions can be selectively inserted into the limiting groove to satisfy the limiting connection.

[0061] In other embodiments, the limiting post 120 and the limiting wheel 130 can also be magnetically attracted or toothed engaging. The key is that they can satisfy the limiting connection between the two in the locked position.

[0062] Please see Figures 3 to 5In actual use, the mounting base 110 is also equipped with a sensor 140 to detect the position of the operating shaft 122. When the operating shaft 122 moves to the locked position, it triggers the sensor 140, which transmits the detection signal to the central controller. After processing and analysis by the central controller, it can issue a command to the indicator light or alarm to remind the staff that the system is in a fall-prevention state. The sensor 140 can be fixed to the limit platform 1112 by sheet metal.

[0063] Please see Figures 1 to 4 This application also provides a lifting device, including a lifting frame 230 and the aforementioned anti-fall mechanism 100, with the anti-fall mechanism 100 installed on the lifting frame 230. A lifting platform 220 is slidably connected to the lifting frame 230. A transmission mechanism 210 is installed on the lifting frame 230 and includes a transmission shaft 211 and a transmission belt assembly 212 connected to the transmission shaft 211. The transmission belt assembly 212 is connected to the lifting platform 220, and a limiting wheel 130 is connected to the transmission shaft 211. In other words, because the limiting wheel 130 is connected to the transmission shaft 211, when the limiting post 120 engages with the limiting wheel 130 to satisfy the limiting action, it prevents the limiting wheel 130 from rotating axially around the transmission shaft 211, thereby limiting the rotation of the transmission shaft 211 around its own axis. The transmission belt assembly 212 also stops working, allowing the lifting platform 220 to remain stationary in a safe position, achieving an anti-fall effect. When the limit post 120 moves away from the limit wheel 130 to release the limit, the drive shaft 211 can rotate with the corresponding motor, thereby driving the drive belt group 212 to operate and realize the height adjustment of the lifting platform 220.

[0064] The transmission belt assembly 212 can be a belt and pulley or a sprocket and chain, as long as it can drive the lifting of the lifting platform 220.

[0065] 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.

[0066] 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 arrest mechanism for connection to a hoist (200), the hoist (200) comprising a hoist platform (220) and a drive mechanism (210) connected to the hoist platform (220) and arranged to drive the hoist platform (220) to move, characterised in that, The anti-falling mechanism (100) comprises: an assembly base (110) provided with a first bearing portion (1101) and a second bearing portion (1102), the first bearing portion (1101) and the second bearing portion (1102) being arranged in a vertical direction; a limiting column (120) movably connected to the assembly base (110), the limiting column (120) having a locking position and an unlocking position; a limiting wheel (130) for being connected with the transmission mechanism (210); wherein the limiting column (120) can be limited in the first bearing portion (1101) or the second bearing portion (1102) to switch the locking position and the unlocking position; in the locking position, the limiting column (120) is limitedly connected with the limiting wheel (130), and in the unlocking position, the limiting column (120) is disengaged from the limiting wheel (130).

2. The fall arrest device of claim 1, wherein, In the vertical direction, the distance between the first bearing portion (1101) and the limiting wheel (130) is smaller than the distance between the second bearing portion (1102) and the limiting wheel (130); in the locking position, the limiting column (120) is limited in the first bearing portion (1101), and in the unlocking position, the limiting column (120) is limited in the second bearing portion (1102).

3. The fall arrest device of claim 1, wherein, The assembly base (110) comprises: a seat body (111) provided with the first bearing portion (1101); a limiting block (112) connected to the seat body (111), at least a part of the limiting block (112) protruding from the seat body (111) in the vertical direction, and the second bearing portion (1102) being arranged at the protruding part; wherein the seat body (111) and / or the limiting block (112) is provided with a through channel (1110) penetrating in the vertical direction, the limiting column (120) penetrating the through channel (1110) and being capable of moving along the axial direction of the through channel (1110) and rotating around the axis of the limiting column (120) to switch the locking position and the unlocking position.

4. The fall arrest device of claim 3, wherein, The limiting block (112) is provided with a clamping groove at the protruding part, and the clamping groove forms the second bearing portion (1102); in the unlocking position, a part of the limiting column (120) is clamped in the clamping groove.

5. The fall arrest device of claim 3, wherein, The seat body (111) comprises an assembly portion (1111) and a limiting platform (1112) connected to the assembly portion (1111), the through channel (1110) being arranged at the limiting platform (1112), the side of the limiting platform (1112) away from the limiting wheel (130) forming the first bearing portion (1101), and the limiting block (112) protruding from the side of the limiting platform (1112) away from the limiting wheel (130) in the vertical direction; in the locking position, a part of the limiting column (120) is overlapped on the first bearing portion (1101).

6. The fall arrest device of claim 3, wherein, The limiting column (120) is provided with a limiting stop (123). The assembly base (110) further comprises an elastic member (114) connected between the seat body (111) and the limiting block (123), for applying a force to the limiting column (120) towards the limiting wheel (130).

7. The fall arrest device of claim 3, wherein, The assembly base (110) further comprises a guide block (113) connected to the seat body (111), the guide block (113) being provided with a guide channel (1131) for the limiting column (120) to pass through, the guide channel (1131) being coaxially arranged with the passing channel (1110).

8. The fall arrest device of claim 1, wherein, The limiting column (120) comprises a column body (121) and an operation shaft (122) connected to the column body (121), both being arranged at an angle, the column body (121) being movably connected to the assembly base (110), and the operation shaft (122) being capable of limiting cooperation with the first bearing part (1101) or the second bearing part (1102).

9. The fall arrest device of claim 1, wherein, The limiting wheel (130) comprises a wheel body (131) and a plurality of limiting parts (132) provided on the wheel body (131), the plurality of limiting parts (132) being arranged at intervals along the circumference of the wheel body (131) and capable of selectively limiting connection with the limiting column (120), and the wheel body (131) being used for connection with the transmission mechanism (210).

10. A lifting device, characterized in that Comprise: A lifting frame (230); The anti-falling mechanism (100) of any one of claims 1 to 9 is mounted on the lifting frame (230); Wherein, the lifting platform (220) is slidingly connected to the lifting frame (230), the transmission mechanism (210) is mounted on the lifting frame (230) and comprises a transmission shaft (211) and a transmission belt group (212) connected to the transmission shaft (211), the transmission belt group (212) is connected with the lifting platform (220), and the limiting wheel (130) is connected with the transmission shaft (211).

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