A fall protection device and hoist
By designing a speed limiter and linkage mechanism in the mechanical system, the safety and space occupation issues of the fall protection device are solved, achieving a high level of safety and compact fall protection effect in the automated warehouse.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HUAZHANG INTELLIGENT TECH CO LTD
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-10
AI Technical Summary
Existing fall arrest devices are insufficient in terms of safety and take up too much space in automated warehouses, making them difficult to apply in compact environments.
A fall arrestor with a purely mechanical mechanism includes a speed limiter, a brake cable, a roller, a brake column, a brake caliper, and a linkage mechanism. The speed limiter restricts the speed of the brake cable, and the linkage mechanism drives the brake caliper to clamp the brake column to achieve automatic braking.
It enables automatic braking when speeding, improving safety and reliability, while reducing the space occupied by the device, making it suitable for compact environments.
Smart Images
Figure CN224479211U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fall protection devices, and in particular to a fall protection device and a hoist. Background Technology
[0002] Currently, in automated warehouses, goods are mainly moved and transferred using shuttle cars, and the lifting function of elevators is used to allow shuttle cars to pick up and place goods between different storage levels. To ensure the safety of the shuttle cars during their vertical movement, fall arrest devices are currently installed on the elevators to prevent the shuttle cars from falling at high speeds. However, existing fall arrest devices rely heavily on electrical components, which are at risk of failure after prolonged use. Therefore, the safety of existing fall arrest devices needs to be improved. In addition, existing fall arrest devices also have the disadvantage of occupying a lot of space, making them difficult to apply in scenarios where compact structures are required. Therefore, it is necessary to improve the existing fall arrest devices. Utility Model Content
[0003] This utility model provides a fall protection device and a hoist, which mainly solves the technical problem of how to improve the safety of the fall protection device while also reducing the space occupied by the fall protection device.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A fall protection device includes a speed limiter, a brake rope, a roller, a brake column, a brake caliper, and a linkage mechanism.
[0006] The speed limiter and the roller are arranged longitudinally at intervals. The brake cable is wound around the speed limiter and the roller respectively. The brake caliper is located on one side of the brake column and is used to support the tray. The brake caliper has a braking state where it clamps the brake column and a free state where it can move up and down along the brake column after releasing the brake column. The linkage mechanism is connected to the brake cable and the brake caliper respectively, and the end of the linkage mechanism away from the brake cable is rotatable relative to the brake caliper. The brake caliper drives the brake cable to move up and down through the linkage mechanism. The speed limiter is used to restrict the brake cable from moving at a speed exceeding a threshold. When the brake cable is restricted from moving by the speed limiter, the linkage mechanism rotates relative to the brake caliper under the weight of the tray and the tension of the brake cable, and drives the brake caliper to switch from the free state to the braking state.
[0007] In one of the technical solutions, the brake caliper includes a base, a dynamic brake module, a sliding block, and a static brake module;
[0008] The end of the linkage mechanism away from the brake cable is rotatable relative to the seat. The sliding block is slidably connected to the seat in an inclined direction. The static brake module is fixedly connected to the seat and arranged on one side of the sliding block. The dynamic brake module is fixedly connected to the sliding block and faces the static brake module. The brake column extends between the dynamic brake module and the static brake module. The sliding block is connected to the linkage mechanism. When the brake cable is restricted from moving by the speed limiter, the linkage mechanism is pulled by the tension of the brake cable, causing the sliding block to move and the dynamic brake module and the static brake module to clamp the brake column together.
[0009] In one of the technical solutions, the linkage mechanism includes a fixed block, a first link, and a second link;
[0010] One end of the first connecting rod is rotatably connected to the sliding block or the dynamic brake module, and the other end of the first connecting rod is rotatably connected to the second connecting rod, with the second connecting rod located below the first connecting rod. One end of the second connecting rod is provided with a strip-shaped limiting groove, and the fixing block passes through the limiting groove. The fixing block is fixedly connected to the brake rope. The end of the second connecting rod away from the brake rope is rotatable relative to the seat. When the second connecting rod is subjected to the upward pulling force of the brake rope and rotates relative to the seat, the second connecting rod drives the sliding block to move upward through the first connecting rod, causing the dynamic brake module and the static brake module to jointly clamp the brake column.
[0011] In one of the technical solutions, the fall protection device includes two spaced-apart brake pillars, two brake calipers, and two linkage mechanisms. Each brake pillar has a brake caliper on one side, and both brake calipers are connected to the linkage mechanisms. A synchronizing rod is fixed between the two linkage mechanisms, and the synchronizing rod is fixedly connected to the end of each linkage mechanism away from the brake cable.
[0012] In one of the technical solutions, the fall protection device further includes a fixing rib plate, which is sleeved on the synchronizing rod. The fixing rib plate is fixed relative to the base body. The synchronizing rod is rotatably connected to the fixing rib plate about its own central axis. The central axis of the synchronizing rod is parallel to the horizontal direction.
[0013] In one of the technical solutions, a reset torsion spring is sleeved on the synchronizing rod. The reset torsion spring is sleeved on the synchronizing rod, one end of the reset torsion spring is fixed to the synchronizing rod, and the other end of the reset torsion spring abuts against the surface of the fixing rib. The synchronizing rod is subjected to the torsion of the reset torsion spring, causing the end of the second connecting rod away from the synchronizing rod to have a downward rotation tendency.
[0014] In one technical solution, the speed limiter includes a fixed base, a flywheel, a ratchet, and a pawl; the flywheel is rotatably connected to the fixed base, the brake cable is wound around the outer wall of the flywheel, and the flywheel rotates when the brake cable moves; the pawl is located on the outside of the ratchet, and one of the ratchet and the pawl is connected to the flywheel to rotate with it, while the other is fixed to the fixed base; when the speed of the flywheel exceeds a threshold, one of the pawl and the ratchet performs a centrifugal motion and engages with the ratchet.
[0015] In one of the technical solutions, the fall arrestor includes two rollers, a speed limiter is disposed above the two rollers, the speed limiter is fixedly connected to the brake column, the two rollers are rotatably connected to the brake column, the two rollers are arranged laterally at intervals, and the brake rope is respectively wound around the two rollers and drives the two rollers to rotate.
[0016] This application also provides a hoist, including a frame, a drive unit, a tray, and the aforementioned anti-fall device. The brake caliper is fixedly connected to the tray, and the end of the linkage mechanism away from the brake rope is rotatably connected to the bottom of the tray. The drive unit is connected to the frame and the tray respectively and is used to drive the tray to move up and down.
[0017] In one of the technical solutions, the pallet is a lateral conveying device, which is used to drive objects to move laterally.
[0018] Compared with the prior art, the fall protection device provided by this utility model has at least the following beneficial effects:
[0019] During normal operation, the tray carries an object and moves vertically at a specified speed range. At this time, the brake caliper connected to the tray is in a free state and moves vertically along with the tray. Simultaneously, the brake caliper drives the brake cable to move up and down around the roller via a linkage mechanism. When the speed at which the tray descends exceeds a preset speed threshold, the speed limiter will automatically lock, restricting the brake cable from moving vertically. Since the linkage mechanism is subjected to both the weight of the tray and the object it carries, as well as the tension of the brake cable, the linkage mechanism will rotate relative to the brake caliper and drive the brake caliper to switch from a free state to a braking state. This achieves the purpose of automatic braking when speeding, that is, it realizes the anti-fall function of the tray.
[0020] The anti-fall device in this solution uses a purely mechanical mechanism to achieve the braking function of the pallet. It not only has the advantages of high safety and reliability and low cost, but also has a relatively compact structure that does not take up too much space, making it suitable for applications in scenarios where structural compactness is a high priority. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a schematic diagram of the structure of a fall protection device provided in an embodiment of this application;
[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;
[0024] Figure 3 This is a schematic diagram of the structure of the brake caliper provided in the embodiments of this application;
[0025] Figure 4 This is a schematic diagram of the speed limiter provided in an embodiment of this application;
[0026] Figure 5 This is a schematic diagram of the structure of a hoist provided in an embodiment of this application.
[0027] Figure label:
[0028] 1. Speed limiter; 11. Mounting base; 12. Flywheel; 13. Ratchet; 14. Pawl; 2. Brake rope; 3. Roller; 4. Brake column; 5. Brake caliper; 51. Base; 52. Dynamic brake module; 53. Sliding block; 531. Through hole; 54. Static brake module; 6. Linkage mechanism; 61. Mounting block; 62. First link; 63. Second link; 631. Rotating end; 632. Limiting groove; 7. Synchronizing rod; 8. Fixing rib; 9. Return torsion spring; 10. Tray; 20. Frame. Detailed Implementation
[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[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 or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0031] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0032] 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 one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0034] Please refer to the following: Figures 1 to 4This utility model provides a fall protection device, which mainly includes a speed limiter 1, a brake rope 2, rollers 3, a brake column 4, a brake caliper 5, and a linkage mechanism 6. The speed limiter 1 and the rollers 3 are arranged longitudinally at intervals. Preferably, the speed limiter 1 is arranged above the rollers 3. The brake rope 2 is wound around the speed limiter 1 and the rollers 3 respectively, so that the brake rope 2 can move in the vertical direction. Preferably, two rollers 3 are used, which are arranged laterally at intervals to adapt to the size of the speed limiter 1, so that the brake rope 2 can move more vertically in the vertical direction. In fact, the speed limiter 1 is fixed relative to the brake column 4, and the two rollers 3 rotate freely relative to the brake column 4 under the drive of the brake rope 2. The brake caliper 5 is located on one side of the brake column 4. The brake caliper 5 connects to the tray to support the tray and any objects on it. The brake caliper 5 has a braking state where it clamps the brake column 4 and a free state where it can move up and down along the brake column 4. The linkage mechanism 6 connects the brake cable 2 and the brake caliper 5. The end of the linkage mechanism 6 away from the brake cable 2 is rotatable relative to the brake caliper 5. Specifically, this means that the end of the linkage mechanism 6 away from the brake cable 2 can be directly rotatably connected to the brake caliper 5, and the other end (rotating end 631) can also be indirectly connected to the brake caliper 5 through connections to other components. The caliper 5 is rotatably connected (for example, the linkage mechanism 6 and the tray are rotatably connected; since the tray is fixedly connected to the brake caliper 5, the rotatable connection between the linkage mechanism 6 and the brake caliper 5 is indirectly achieved). The brake caliper 5 drives the brake cable 2 to move up and down through the linkage mechanism 6. The speed limiter 1 is existing technology. The speed limiter 1 is used to limit the movement of the brake cable 2 at a speed exceeding a threshold. The structure of the speed limiter 1 in this embodiment is the same as that of the speed limiter used to connect a car seat belt. The brake cable 2 is equivalent to the car seat belt. When the movement speed of the brake cable 2 exceeds the threshold, the speed limiter 1 will restrict the movement of the brake cable 2. The speed limiter 1 only allows the brake cable 2 to move within a preset low speed range.
[0035] Specifically, during normal operation, the pallet carries an object and moves vertically at a specified speed range. At this time, the brake caliper 5 connected to the pallet is in a free state and moves vertically along with the pallet. Simultaneously, the brake caliper 5, through the linkage mechanism 6, drives the brake cable 2 to move up and down around the roller 3. When the pallet's descent speed exceeds a preset speed threshold, the speed limiter 1 automatically locks because the brake cable 2's movement speed also exceeds the threshold. This restricts the brake cable 2 from moving vertically. Since the linkage mechanism 6 is subjected to both the weight of the pallet and the object it carries, and the upward tension of the brake cable 2, the linkage mechanism 6 rotates relative to the brake caliper 5, causing the brake caliper 5 to switch from a free state to a braking state. This achieves automatic braking in case of overspeed, i.e., it realizes the pallet's anti-fall function. This anti-fall device uses a purely mechanical mechanism to achieve the pallet's braking function, which not only has the advantages of high safety and reliability and low cost, but also has a compact structure that does not occupy excessive space, making it suitable for applications requiring high structural compactness.
[0036] Please see Figure 4 This section provides a brief description of the structure of the existing speed limiter 1. The speed limiter 1 includes a fixed base 11, a flywheel 12, a ratchet 13, and a pawl 14. The fixed base 11 is fixedly connected to the brake column 4. The flywheel 12 is rotatably connected to the fixed base 11. The aforementioned brake cable 2 is wound around the outer wall of the flywheel 12. When the brake cable 2 moves, it will drive the flywheel 12 to rotate. The pawl 14 is located on the outside of the ratchet 13. One of the ratchet 13 and the pawl 14 needs to be designed to connect with the flywheel 12 so that it rotates with the flywheel 12. The other of the ratchet 13 and the pawl 14 is fixed to the fixed base 11. Taking the connection between ratchet 13 and flywheel 12, with pawl 14 fixed to the fixed base 11 as an example, when the rotational speed of flywheel 12 exceeds the threshold, ratchet 13 will undergo centrifugal motion and cooperate with pawl 14. Restricted by pawl 14, flywheel 12 will be unable to rotate, thus achieving the function of limiting the speed of brake cable 2. Of course, ratchet 13 fixed to the fixed base 11 and pawl 14 connected to flywheel 12 can also achieve the function of limiting the rotation of overspeeding flywheel 12. Furthermore, a torque buffer structure is usually provided between flywheel 12 and pawl 14 or between flywheel 12 and ratchet 13, so that both overspeeding flywheel 12 and brake cable 2 can be gradually decelerated rather than immediately stopped (similar to the effect of a car seatbelt gradually decelerating rather than immediately stopping when its movement is restricted). This allows the overspeeding pallet to be gradually decelerated, improving the stability of the pallet's descent while preventing it from falling, and solving the problem of instability caused by large speed changes during deceleration and fall prevention.
[0037] Please see Figure 3The brake caliper 5 specifically includes a base 51, a dynamic brake module 52, a sliding block 53, and a static brake module 54. The base 51 connects to the tray. The end of the linkage mechanism 6 furthest from the brake cable 2 (i.e., the rotating end 631) is rotatable relative to the base 51. The static brake module 54 is fixed to the base 51. The sliding block 53 is slidably connected to the base 51 along an inclined direction and arranged on one side of the static brake module 54. The dynamic brake module 52 is fixed to the side of the sliding block 53 facing the static brake module 54. The brake column 4 extends between the stationary brake module 54 and the dynamic brake module 52. The sliding block 53 or the dynamic brake module 52 is provided with a through hole 531. The linkage mechanism 6 is rotatably connected to the sliding block 53 or the dynamic brake module 52 at this through hole 531. When the brake rope 2 is restricted from moving by the speed limiter 1, the linkage mechanism 6 drives the sliding block 53 to move upward and causes the dynamic brake module 52 and the stationary brake module 54 to clamp the brake column 4 together, thereby specifically realizing the function of automatic braking and deceleration when the tray falls at excessive speed.
[0038] Please refer to the following: Figure 1 and Figure 2 The linkage mechanism 6 in this embodiment specifically includes a fixing block 61, a first link 62, and a second link 63. One end of the first link 62 is rotatably connected to the sliding block 53 or the dynamic brake module 52 at point B (point B is the location of the aforementioned through hole 531). The other end of the first link 62 is rotatably connected to the second link 63 at point C, and the second link 63 is located below the first link 62. The end of the second link 63 away from the brake rope 2 is understood as the aforementioned rotating end 631. A strip-shaped limiting groove 632 is provided at the end of the second link 63 away from the rotating end 631. The fixing block 61 passes through this limiting groove 632, and the fixing block 61 is fixedly connected to the brake rope 2. When the brake rope 2 is restricted from moving up and down by the speed limiter 1, the weight of the tray will be transmitted to the second link 63 through the first link 62. At this time, the second link 63 is also subjected to the tension of the brake rope 2. Therefore, the rotating end 631 of the second link 63 will rotate relative to the seat 51. During this process, the position of the fixing block 61 in the limiting groove 632 will change. During this process, the second link 63 will drive the sliding block 53 to move upward through the first link 62, so that the dynamic brake module 52 and the static brake module 54 can jointly clamp the brake column 4, thereby more specifically realizing the function of automatic braking and deceleration when the tray falls at excessive speed.
[0039] Please refer to them again. Figure 1 and Figure 2Since single-sided braking is relatively unstable, the fall protection device in this embodiment preferably adopts a double-sided braking structure. Specifically, the fall protection device in this embodiment includes two spaced-apart brake pillars 4, each with a brake caliper 5 on one side. Both brake calipers 5 are connected to the aforementioned linkage mechanism 6. Furthermore, a synchronizing rod 7 is fixed between the two linkage mechanisms 6. The synchronizing rod 7 is actually fixedly connected to the rotating end 631 of the two linkage mechanisms 6 respectively, so that when one linkage mechanism 6 rotates relative to the seat 51, the other linkage mechanism 6 will also rotate synchronously, thereby enabling the brake calipers 5 on both sides to brake synchronously, thus improving the stability of the tray deceleration and descent process. Further, this solution only requires a speed limiter 1 and a brake rope 2 on one side to achieve simultaneous braking on both sides. This frees up space on one side for other components, such as counterweights, which may be required on one side. Therefore, this solution has the advantage of a more compact structure.
[0040] Please refer to them again. Figure 1 and Figure 2 The fall arrestor in this embodiment also includes a fixing rib 8, which is sleeved on the aforementioned synchronizing rod 7 to limit the synchronizing rod 7 to a specified height. The fixing rib 8 is used to fix the bottom of the tray, so that the fixing rib 8 is equivalent to being fixed relative to the seat 51. The aforementioned synchronizing rod 7 is rotatably connected to the fixing rib 8 with its own central axis as the axis of rotation, and the central axis of the synchronizing rod 7 is parallel to the horizontal direction. With this design, the rotating end 631 of the aforementioned linkage mechanism 6 is equivalent to rotating with the central axis of the synchronizing rod 7 as the axis of rotation when rotating. In other words, the synchronizing rod 7 in this embodiment not only plays the role of synchronizing the rotation of the linkage mechanisms 6 on both sides, but also plays the role of rotatably connecting the rotating ends 631 of the linkage mechanisms 6 on both sides to the tray, thereby making the overall structure more compact.
[0041] Please refer to them again. Figure 1 and Figure 2The fall protection device in this embodiment also includes a reset torsion spring 9. The reset torsion spring 9 is sleeved on the synchronizing rod 7. One end of the reset torsion spring 9 is fixed on the synchronizing rod 7, and the other end of the reset torsion spring 9 abuts against the surface of the aforementioned fixing rib plate 8. The synchronizing rod 7 is subjected to the torsion of the reset torsion spring 9, causing the end of the second connecting rod 63 away from the synchronizing rod 7 to have a downward rotation tendency. On the one hand, during the lifting and lowering of the tray, the brake cable 2 exerts a slight upward pull on the second link 63. This pull may cause the brake caliper 5 to brake accidentally. Therefore, the reset torsion spring 9 can counteract the slight pull exerted by the brake cable 2 on the second link 63. In fact, when the tray descends at excessive speed and is braked, the synchronizing rod 7 is pulled and rotated by the brake cable 2, which drives the reset torsion spring 9 to rotate and compress further. On the other hand, when the tray descends at excessive speed and is braked, and the speed limiter 1 releases the speed limit, the brake cable 2 will return to a movable state. Then, the reset torsion spring 9 can drive the second link 63 to automatically reset, thereby realizing that the brake caliper 5 automatically switches from the braking state to the free state, which is to restore the vertical movement of the tray.
[0042] Please see Figure 5 This embodiment also provides a hoist, which includes a frame 20, a drive device (not shown in the figure), a pallet 10, and the aforementioned anti-fall device. The brake caliper 5 is fixedly connected to the pallet 10 to bear the weight of the pallet 10 and the objects on the pallet 10. The rotating end 631 of the linkage mechanism 6 away from the brake rope 2 is preferably designed to be rotatably connected to the bottom of the pallet 10. The speed limiter 1 and the brake column 4 are both fixed on the frame 20. The two rollers 3 are rotatably connected to the frame 20. The drive device is fixed on the frame 20 and connected to the pallet 10. The drive device is used to drive the pallet 10 to move in the vertical direction, thereby driving the pallet 10 to a specified height. The pallet 10 can be designed as a horizontal conveyor device. The horizontal conveyor device can be a belt conveyor device. The horizontal conveyor device can drive objects to move laterally to a specified storage location.
[0043] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.
Claims
1. A fall protection device, characterized in that, Includes speed limiter, brake cable, roller, brake column, brake caliper and linkage mechanism; The speed limiter and the roller are arranged longitudinally at intervals. The brake cable is wound around the speed limiter and the roller respectively. The brake caliper is located on one side of the brake column. The brake caliper is used to connect to the tray. The brake caliper has a braking state where it clamps the brake column and a free state where it releases the brake column and can move up and down along the brake column. The linkage mechanism is connected to the brake cable and the brake caliper respectively, and the end of the linkage mechanism away from the brake cable is rotatable relative to the brake caliper. The brake caliper drives the brake cable to move up and down through the linkage mechanism. The speed limiter is used to limit the movement of the brake cable at a speed exceeding a threshold. When the movement of the brake cable is restricted by the speed limiter, the linkage mechanism is rotated relative to the brake caliper by the gravity of the tray and the tension of the brake cable, and drives the brake caliper to switch from the free state to the braking state.
2. The fall arrestor as described in claim 1, characterized in that, The brake caliper includes a base, a dynamic brake module, a sliding block, and a static brake module; The end of the linkage mechanism away from the brake cable is rotatable relative to the seat. The sliding block is slidably connected to the seat in an inclined direction. The stationary brake module is fixedly connected to the seat and arranged on one side of the sliding block. The moving brake module is fixedly connected to the sliding block and faces the stationary brake module. The brake column extends between the moving brake module and the stationary brake module. The sliding block is connected to the linkage mechanism. When the brake cable is restricted from moving by the speed limiter, the linkage mechanism drives the sliding block to move upward and causes the moving brake module and the stationary brake module to jointly clamp the brake column.
3. The fall arrestor as described in claim 2, characterized in that, The linkage mechanism includes a fixed block, a first link, and a second link; One end of the first connecting rod is rotatably connected to the sliding block or the dynamic brake module, and the other end of the first connecting rod is rotatably connected to the second connecting rod, with the second connecting rod located below the first connecting rod. One end of the second connecting rod is provided with a strip-shaped limiting groove, and the fixing block passes through the limiting groove. The fixing block is fixedly connected to the brake rope. The end of the second connecting rod away from the brake rope is rotatable relative to the seat. When the second connecting rod is subjected to the upward pulling force of the brake rope and rotates relative to the seat, the second connecting rod drives the sliding block to move upward through the first connecting rod, causing the dynamic brake module and the static brake module to jointly clamp the brake column.
4. The fall arrestor as described in claim 3, characterized in that, The fall arrestor includes two spaced-apart brake pillars, two brake calipers, and two linkage mechanisms. Each brake pillar has a brake caliper on one side, and both brake calipers are connected to the linkage mechanisms. A synchronizing rod is fixed between the two linkage mechanisms, and the synchronizing rod is fixedly connected to the end of each linkage mechanism away from the brake cable.
5. The fall arrestor as described in claim 4, characterized in that, The fall arrestor also includes a fixing rib, which is sleeved on the synchronizing rod. The fixing rib is fixed relative to the base. The synchronizing rod is rotatably connected to the fixing rib about its own central axis. The central axis of the synchronizing rod is parallel to the horizontal direction.
6. The fall arrestor as described in claim 5, characterized in that, A reset torsion spring is sleeved on the synchronizing rod. One end of the reset torsion spring is fixed to the synchronizing rod, and the other end of the reset torsion spring abuts against the surface of the fixing rib. The synchronizing rod is subjected to the torsion of the reset torsion spring, causing the end of the second connecting rod away from the synchronizing rod to have a downward rotation tendency.
7. The fall arrestor as described in claim 1, characterized in that, The speed limiter includes a fixed base, a flywheel, a ratchet, and a pawl. The flywheel is rotatably connected to the fixed base. The brake cable is wound around the outer wall of the flywheel. When the brake cable moves, it drives the flywheel to rotate. The pawl is located on the outside of the ratchet. One of the ratchet and the pawl is connected to the flywheel to rotate with it, while the other is fixed to the fixed base. When the speed of the flywheel exceeds a threshold, one of the pawl and the ratchet performs a centrifugal motion and engages with the ratchet.
8. The fall arrestor as described in claim 1, characterized in that, The fall arrestor includes two rollers, and the speed limiter is located above the two rollers. The speed limiter is fixedly connected to the brake column. Both rollers are rotatably connected to the brake column. The two rollers are arranged laterally at intervals. The brake rope is wound around the two rollers and drives the two rollers to rotate.
9. A hoist, characterized in that, The device includes a frame, a drive unit, a tray, and a fall arrestor as described in any one of claims 1 to 8. The brake caliper is fixedly connected to the tray, and the end of the linkage mechanism away from the brake cable is rotatably connected to the bottom of the tray. The drive unit is connected to the frame and the tray respectively and is used to drive the tray to move up and down.
10. The hoist as described in claim 9, characterized in that, The pallet is a transverse conveying device, which is used to drive objects to move laterally.