A kind of anti-falling device of permanent magnet synchronous cargo elevator

Abstract

The utility model discloses a kind of anti-falling devices of permanent magnet synchronous freight elevator, including guide wheel assembly, stop brake assembly and buffer assembly, stop brake assembly, buffer assembly are respectively arranged in guide wheel assembly both sides, guide wheel assembly includes mounting bracket, mounting bracket side is inserted with mounting shaft, mounting shaft one end bolt is fixed with wheel body, and multiple wheel blades are welded in wheel body side wall, buffer assembly includes shell, threaded cylinder, cylinder, the structure of wheel body, wheel blade is installed in cylinder interior by sealing bearing;The utility model is pushed by buffer assembly in jacking screw rod push plate, non-newtonian fluid in installation groove is pressed into cylinder through through-hole, when elevator abnormally drops, wheel blade high-speed rotation impact fluid, trigger non-newtonian fluid's shear thickening effect, form solid-state resistance barrier, this design can be realized millisecond level response without physical contact, significantly reduce traditional mechanical brake delay risk, impact force is effectively absorbed by fluid viscous energy dissipation simultaneously, avoid car rigid collision.

Description

Technical Field

[0001] This utility model relates to the field of elevator fall prevention technology, specifically to a fall prevention device for a permanent magnet synchronous freight elevator. Background Technology

[0002] Permanent magnet synchronous freight elevators are freight elevators with permanent magnet synchronous traction machines as their core drive unit, specifically designed for efficient and energy-saving cargo transportation needs. Their core advantages include a gearless transmission structure, high energy efficiency ratio, and large tonnage load capacity, making them widely used in industrial logistics, commercial buildings, and other scenarios.

[0003] For example, a high-strength anti-fall safety device for freight elevators, with application number CN202422790173.X and authorization announcement date of 20250822, includes an elevator shaft. A horizontal plate is fixedly connected to the top of the elevator shaft, and a traction assembly is installed on the upper part of the horizontal plate. A car is located in the middle of the elevator shaft, and an anti-fall assembly is installed on the top of the car's interior. Protective components are installed on both sides of the car's interior, and an elevator door is installed on the exterior of the car. The anti-fall assembly includes a leaf spring, which is fixedly connected to the inner top of the car. A U-shaped ring is fixedly connected to the middle of the leaf spring, and fixed brackets are fixedly connected to both sides of the car's inner top. In this invention, when the steel cable of the elevator's traction assembly breaks, the leaf spring and rotating blocks work together to lock the bottoms of the two rotating blocks inside the serrated grooves on the outside of the two limiting blocks, preventing rapid descent and ensuring safety.

[0004] Traditional elevator fall protection devices mostly use a braking structure, but the braking of the braking structure relies on physical contact response, which poses a risk of action delay. Furthermore, frequent impacts can easily lead to wear of the sawtooth grooves, reducing reliability. Therefore, there is an urgent need to design a fall protection device for permanent magnet synchronous freight elevators to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a fall prevention device for a permanent magnet synchronous freight elevator to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A fall prevention device for a permanent magnet synchronous freight elevator includes an idler wheel assembly, a brake assembly, and a buffer assembly. The brake assembly and the buffer assembly are respectively disposed on both sides of the idler wheel assembly. The idler wheel assembly includes a mounting frame, with a mounting shaft inserted into one side of the mounting frame. A wheel body is bolted to one end of the mounting shaft, and multiple wheel blades are welded to the side wall of the wheel body. The buffer assembly includes a housing, a threaded cylinder, and a cylindrical body. The structure formed by the wheel body and wheel blades is installed inside the cylindrical body via a sealed bearing. A mounting groove is formed at the top of the housing, and a lifting screw is installed inside the mounting groove via a bearing. A cylindrical thread is installed on the outside of the lifting screw. A push plate is welded to the bottom end of the threaded cylinder, and the push plate is slidably installed inside the mounting groove. The cylinder body is bolted to the top of the housing. A cap is bolted to one end of the housing. Multiple through holes are opened on one side of the inner wall of the cylinder. The cylinder body communicates with the mounting groove through the through holes. The mounting groove is filled with a non-Newtonian fluid that is pushed by the push plate through the through holes and enters the housing. A groove is opened on one side of the outer wall of the housing, and a lifting motor is bolted to the top of the inner wall of the groove. The output end of the lifting motor is connected to the lifting screw through a coupling.

[0008] Furthermore, a traction sheave is mounted on the outside of the mounting shaft via a flat key, and the traction sheave is located inside the mounting frame.

[0009] Furthermore, the brake stop assembly includes a mounting housing, with a motor groove formed on one outer wall of the mounting housing and a sliding groove formed inside the mounting housing.

[0010] Furthermore, an adjusting screw is installed at the center of the bottom of the inner wall of the slide groove via a bearing, and a connecting block is slidably inserted inside the slide groove, with the connecting block and the adjusting screw being threadedly connected.

[0011] Furthermore, the top of the connecting block is integrally formed with a base block, and an embedding groove is provided on one side of the outer wall of the base block, and a brake pad is slidably installed inside the embedding groove.

[0012] Furthermore, an adjusting motor is bolted to the top of the inner wall of the motor slot, and the output end of the adjusting motor is connected to the adjusting screw via a coupling.

[0013] In the above technical solution, the anti-fall device for a permanent magnet synchronous freight elevator provided by this utility model has the following beneficial effects:

[0014] (1) This utility model pushes the push plate through the lifting screw in the buffer assembly, and presses the non-Newtonian fluid in the installation slot into the cylinder through the through hole. When the elevator falls abnormally, the high-speed rotation of the impeller impacts the fluid, triggering the shear thickening effect of the non-Newtonian fluid and the viscosity increases instantly, forming a solid resistance barrier. This design can achieve millisecond-level response without physical contact, significantly reducing the risk of delay in traditional mechanical braking. At the same time, it effectively absorbs the impact force through fluid viscosity energy dissipation, avoiding hard collisions of the car.

[0015] (2) The brake assembly of this utility model can precisely control the displacement of the connecting block and the brake pad by adjusting the motor drive screw. When braking, the brake pad can gradually contact the wheel body, avoiding the instantaneous rigid impact of the traditional sawtooth groove structure. Combined with the sliding design of the embedded groove, the wear is concentrated only on the replaceable brake pad, which greatly extends the life of the core components and reduces maintenance costs.

[0016] (3) The non-Newtonian fluid preferential response of this utility model realizes the initial deceleration, and the braking component then intervenes to provide the final parking. The two modules are placed on both sides of the guide wheel assembly, physically isolating the fault transmission path, ensuring that the system still has the fall protection capability when a single module fails. It is suitable for the extreme working conditions of large-tonnage freight elevators, greatly improving the safety and economy of the fall protection device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the anti-fall device for a permanent magnet synchronous freight elevator according to the present invention.

[0019] Figure 2 This is a schematic diagram of the guide wheel assembly and buffer assembly provided in an embodiment of the anti-fall device for a permanent magnet synchronous freight elevator according to this utility model.

[0020] Figure 3 This is a schematic diagram of the pulley assembly structure provided for an embodiment of the anti-fall device of a permanent magnet synchronous freight elevator according to this utility model.

[0021] Figure 4 This is a schematic diagram of the mounting frame, traction wheel, and mounting shaft structure provided for an embodiment of the anti-fall device for a permanent magnet synchronous freight elevator according to this utility model.

[0022] Figure 5 This is a schematic diagram of the anti-fall device structure of a permanent magnet synchronous freight elevator according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the mounting shell, connecting block, and lifting screw structure provided for an embodiment of the anti-fall device of a permanent magnet synchronous freight elevator according to this utility model.

[0024] Figure 7 This is a schematic diagram of the buffer component structure provided in an embodiment of the anti-fall device for a permanent magnet synchronous freight elevator according to this utility model.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Traction wheel assembly; 2. Brake assembly; 3. Buffer assembly; 4. Mounting bracket; 5. Mounting shaft; 6. Traction wheel; 7. Wheel body; 8. Wheel blade; 9. Mounting housing; 10. Motor slot; 11. Adjusting motor; 12. Base block; 13. Embedded slot; 14. Brake pad; 15. Slide groove; 16. Adjusting screw; 17. Connecting block; 18. Housing; 19. Groove; 20. Lifting motor; 21. Mounting slot; 22. Lifting screw; 23. Push plate; 24. Threaded cylinder; 25. Cylinder body; 26. Through hole; 27. Cover. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-7 As shown in the figure, the anti-fall device for a permanent magnet synchronous freight elevator provided by this utility model includes a pulley assembly 1, a brake assembly 2, and a buffer assembly 3. The brake assembly 2 and the buffer assembly 3 are respectively arranged on both sides of the pulley assembly 1. The pulley assembly 1 includes a mounting frame 4, with a mounting shaft 5 inserted into one side of the mounting frame 4. A wheel body 7 is bolted to one end of the mounting shaft 5, and multiple wheel blades 8 are welded to the side wall of the wheel body 7. The buffer assembly 3 includes a housing 18, a threaded cylinder 24, and a cylinder 25. The structure formed by the wheel body 7 and the wheel blades 8 is installed inside the cylinder 25 through a sealed bearing. The top of the housing 18 has a mounting groove 21, and a lifting screw 22 is installed inside the mounting groove 21 through a bearing. 4. A threaded rod is installed on the outside of the lifting screw 22. A push plate 23 is welded to the bottom of the threaded cylinder 24 and is slidably installed inside the mounting groove 21. The cylinder 25 is bolted to the top of the housing 18. A cover 27 is bolted to one end of the housing 18. Multiple through holes 26 are opened on one side of the inner wall of the cylinder 25. The cylinder 25 communicates with the mounting groove 21 through the through holes 26. The mounting groove 21 is filled with non-Newtonian fluid that is pushed by the push plate 23 through the through holes 26 and enters the housing 18. A groove 19 is opened on one side of the outer wall of the housing 18. A lifting motor 20 is bolted to the top of the inner wall of the groove 19. The output end of the lifting motor 20 is installed together with the lifting screw 22 through a coupling.

[0029] Specifically, in this embodiment, the assembly includes a pulley assembly 1, a brake assembly 2, and a buffer assembly 3. The brake assembly 2 and the buffer assembly 3 are respectively disposed on both sides of the pulley assembly 1. The pulley assembly 1 includes a mounting frame 4, which serves as a basic support structure and is fixed to the elevator shaft. A mounting shaft 5 is inserted into one side of the mounting frame 4 to transmit traction torque. A wheel body 7 is bolted to one end of the mounting shaft 5, and multiple wheel blades 8 are welded to the side wall of the wheel body 7. The wheel body 7 is bolted to the end of the mounting shaft 5, and the wheel blades 8 are welded to the side of the wheel body 7. The wall rotates at high speed during the fall, generating kinetic energy; the buffer assembly 3 includes a housing 18, a threaded cylinder 24, and a cylinder 25. The structure consisting of a wheel body 7 and a wheel blade 8 is installed inside the cylinder 25 via a sealed bearing. The top of the housing 18 has an installation groove 21, and a lifting screw 22 is installed inside the installation groove 21 via a bearing. The threaded cylinder 24 is threaded onto the outside of the lifting screw 22. A push plate 23 is welded to the bottom of the threaded cylinder 24, and the push plate 23 is slidably installed inside the installation groove 21. The cylinder 25 is bolted to the top of the housing 18, and one end of the housing 18 is bolted to... The cylinder 25 is equipped with a cover 27. Multiple through holes 26 are formed on one side of the inner wall of the cylinder 25. The cylinder 25 communicates with the mounting groove 21 through the through holes 26. The mounting groove 21 is filled with a non-Newtonian fluid pushed by the push plate 23 through the through holes 26 into the housing 18. A groove 19 is formed on one side of the outer wall of the housing 18, and a lifting motor 20 is bolted to the top of the inner wall of the groove 19. The lifting motor 20 is preferably a Siemens 1FL6044-1AF61-1LA1. When the elevator falls, the high-speed rotating impeller 8 impacts the fluid inside the cylinder 25, and the lifting motor... The motor 20 is installed in the groove 19 and starts to drive the lifting screw 22 to rotate. The threaded cylinder 24 moves upward along the lifting screw 22, pushing the push plate 23 to slide upward in the mounting groove 21. The push plate 23 squeezes the non-Newtonian fluid, causing it to flow into the cylinder 25 through the through hole 26. The fluid is sheared by the impeller 8, triggering a shear thickening effect. The viscosity increases sharply, forming a solid barrier that momentarily blocks the rotation of the impeller 8. The impact kinetic energy is converted into heat energy through the fluid's viscous friction and dissipated through the shell 18 and the cover 27. The output end of the lifting motor 20 is installed together with the lifting screw 22 through a coupling.

[0030] This utility model provides a fall prevention device for a permanent magnet synchronous freight elevator. The push plate 23 is pushed by the lifting screw 22 in the buffer assembly 3, which forces the non-Newtonian fluid in the mounting groove 21 into the cylinder 25 through the through hole 26. When the elevator falls abnormally, the high-speed rotation of the impeller 8 impacts the fluid, triggering the shear thickening effect of the non-Newtonian fluid, which instantly increases the viscosity and forms a solid resistance barrier. This design can achieve a millisecond-level response without physical contact, significantly reducing the risk of delay in traditional mechanical braking. At the same time, it effectively absorbs the impact force through fluid viscosity energy dissipation, avoiding hard collisions with the car.

[0031] In one embodiment provided by this utility model, such as Figure 3-4As shown, a traction wheel 6 is mounted on the outside of the mounting shaft 5 via a flat key. The traction wheel 6 is mounted on the outside of the mounting shaft 5 via a flat key and is located inside the mounting frame 4 to ensure that the power transmission is free from slippage; and the traction wheel 6 is located inside the mounting frame 4.

[0032] In another embodiment provided by this utility model, such as Figure 5-6 As shown, the brake-stop assembly 2 includes a mounting housing 9. A motor slot 10 is formed on one outer wall of the mounting housing 9. A sliding groove 15 is provided inside the mounting housing 9. An adjusting screw 16 is mounted at the center of the bottom of the inner wall of the sliding groove 15 via a bearing. A connecting block 17 is slidably inserted into the sliding groove 15, and the connecting block 17 is threadedly connected to the adjusting screw 16. A base block 12 is integrally formed at the top of the connecting block 17, and an embedding groove 13 is formed on one outer wall of the base block 12. A brake-stopping plate 14 is slidably installed inside the embedding groove 13. The brake-stopping plate 14 is preferably made of sintered metal-ceramic material. An adjusting motor 11 is bolted to the top of the inner wall of the motor slot 10. The regulating motor 11 is preferably a Delta ECMA-E11310RS. The regulating motor 11 is located in the motor slot 10 and starts to drive the regulating screw 16 to rotate. The connecting block 17 slides along the slide groove 15, which drives the base block 12 and the brake pad 14 to move towards the wheel body 7. The brake pad 14 is slidably installed on the base block 12 through the embedded groove 13 and can be replaced independently. The brake pad 14 gradually contacts the wheel body 7 to avoid instantaneous rigid impact and reduce component wear. If the buffer assembly 3 fails to brake completely, the brake pad 14 provides a secondary mechanical stop. The output end of the regulating motor 11 is installed together with the regulating screw 16 through a coupling.

[0033] Example 1

[0034] A fall prevention device for a permanent magnet synchronous freight elevator includes a pulley assembly 1, a brake assembly 2, and a buffer assembly 3. The brake assembly 2 and the buffer assembly 3 are respectively disposed on both sides of the pulley assembly 1. The pulley assembly 1 includes a mounting frame 4, which serves as a basic support structure and is fixed to the elevator shaft. A mounting shaft 5 is inserted into one side of the mounting frame 4 to transmit traction torque. A wheel body 7 is bolted to one end of the mounting shaft 5, and multiple wheel blades 8 are welded to the side wall of the wheel body 7. The wheel body 7 is fixed to the end of the mounting shaft 5 by bolts, and the wheel blades 8 are welded to the side wall. The wheel body 7 rotates at high speed on its side wall during descent, generating kinetic energy. The buffer assembly 3 includes a housing 18, a threaded cylinder 24, and a cylinder 25. The structure formed by the wheel body 7 and the wheel blade 8 is installed inside the cylinder 25 via a sealed bearing. The top of the housing 18 has a mounting groove 21, and a lifting screw 22 is installed inside the mounting groove 21 via a bearing. The threaded cylinder 24 is threaded onto the outside of the lifting screw 22. A push plate 23 is welded to the bottom of the threaded cylinder 24, and the push plate 23 is slidably installed inside the mounting groove 21. The cylinder 25 is bolted to the top of the housing 18. One end of the housing 18... A cap 27 is bolted on. Multiple through holes 26 are formed on one side of the inner wall of the cylinder 25. The cylinder 25 communicates with the mounting groove 21 through the through holes 26. The mounting groove 21 is filled with non-Newtonian fluid pushed by the push plate 23 through the through holes 26 into the housing 18. A groove 19 is formed on one side of the outer wall of the housing 18, and a lifting motor 20 is bolted to the top of the inner wall of the groove 19. The lifting motor 20 is preferably a Siemens 1FL6044-1AF61-1LA1. When the elevator falls, the high-speed rotating impeller 8 impacts the fluid inside the cylinder 25, and the lifting motor... The machine 20 is installed in the groove 19 and starts to drive the lifting screw 22 to rotate. The threaded cylinder 24 moves upward along the lifting screw 22, pushing the push plate 23 to slide upward in the mounting groove 21. The push plate 23 squeezes the non-Newtonian fluid, causing it to flow into the cylinder 25 through the through hole 26. The fluid is sheared by the impeller 8, triggering a shear thickening effect. The viscosity increases sharply, forming a solid barrier that momentarily blocks the rotation of the impeller 8. The impact kinetic energy is converted into heat energy through the fluid's viscous friction and is dissipated through the shell 18 and the cover 27. The output end of the lifting motor 20 is installed together with the lifting screw 22 through a coupling.

[0035] Example 2

[0036] This embodiment further defines the features of Embodiment 1. A traction wheel 6 is mounted externally to the mounting shaft 5 via a flat key. The traction wheel 6 is mounted externally to the mounting shaft 5 and located inside the mounting frame 4, ensuring slip-free power transmission. The brake assembly 2 includes a mounting housing 9. A motor groove 10 is formed on one outer wall of the mounting housing 9. A sliding groove 15 is provided inside the mounting housing 9. An adjusting screw 16 is mounted at the bottom center of the inner wall of the sliding groove 15 via a bearing. A connecting block 17 is slidably inserted into the sliding groove 15, and the connecting block 17 is threadedly connected to the adjusting screw 16. A base block 12 is integrally formed at the top of the connecting block 17, and an embedding groove 13 is formed on one outer wall of the base block 12. A sliding mounting is installed inside the embedding groove 13. A brake pad 14 is provided, preferably made of sintered metal ceramic material. An adjusting motor 11 is bolted to the top of the inner wall of the motor slot 10. The adjusting motor 11 is preferably a Delta ECMA-E11310RS. The adjusting motor 11 is located in the motor slot 10 and starts to drive the adjusting screw 16 to rotate. The connecting block 17 slides along the slide groove 15, driving the base block 12 and the brake pad 14 to move towards the wheel body 7. The brake pad 14 is slidably installed on the base block 12 through the embedded groove 13 and can be replaced independently. The brake pad 14 gradually contacts the wheel body 7 to avoid instantaneous rigid impact and reduce component wear. If the buffer assembly 3 fails to brake completely, the brake pad 14 provides a secondary mechanical stop. The output end of the adjusting motor 11 is installed together with the adjusting screw 16 through a coupling.

[0037] Working principle: When the elevator falls abnormally, the wheel 7 drives the impeller 8 to rotate at high speed inside the cylinder 25. When the speed of the impeller 8 exceeds the set threshold, an action is triggered. The lifting motor 20 drives the lifting screw 22 to rotate through the coupling. The threaded cylinder 24 moves down along the screw, pushing the push plate 23 to slide upward in the mounting groove 21, forcing the non-Newtonian fluid into the cylinder 25 through the through hole 26. The impeller 8 shears the fluid at high speed, triggering the shear thickening effect of the non-Newtonian fluid. The fluid viscosity increases to more than 1000 times its initial value within 0.05 seconds, forming a solid resistance barrier. This process, through the linkage between the traction wheel 6 and the mounting shaft 5, converts rotational kinetic energy into fluid viscous energy dissipation. The initial deceleration is as follows: After the regulating motor 11 starts, it drives the regulating screw 16 to rotate through the coupling, which drives the connecting block 17 to move along the slide groove 15 towards the wheel body 7. The base block 12 moves synchronously with the connecting block 17, and the brake pad 14 embedded in the groove 13 gradually contacts the wheel body 7 to avoid rigid impact. The brake pad 14 consumes the remaining kinetic energy through friction braking. During this process, the cylinder 25 of the buffer component 3 and the mounting shell 9 of the brake component 2 are placed on both sides of the guide wheel component 1 and are physically isolated by the mounting bracket 4 to prevent the transmission of a single component failure. The non-Newtonian fluid responds first under the impact of the wheel blade 8. After the kinetic energy is dissipated, the brake pad 14 completely presses against the wheel body 7 to achieve parking.

[0038] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fall prevention device for a permanent magnet synchronous freight elevator, comprising a pulley assembly (1), a brake assembly (2), and a buffer assembly (3), characterized in that, The brake stop assembly (2) and the buffer assembly (3) are respectively arranged on both sides of the pulley assembly (1). The pulley assembly (1) includes a mounting bracket (4). A mounting shaft (5) is inserted into one side of the mounting bracket (4). A wheel body (7) is bolted to one end of the mounting shaft (5). Multiple wheel blades (8) are welded to the side wall of the wheel body (7). The buffer assembly (3) includes a housing (18), a threaded cylinder (24), and a cylinder (25). The structure formed by the wheel body (7) and the wheel blades (8) is installed inside the cylinder (25) through a sealed bearing. An installation groove (21) is opened at the top of the housing (18). A lifting screw (22) is installed inside the installation groove (21) through a bearing. The threaded cylinder (24) is threaded onto the outside of the lifting screw (22). A push plate (23) is welded to the bottom end, and the push plate (23) is slidably installed inside the mounting groove (21). The cylinder (25) is bolted to the top of the shell (18). A cover (27) is bolted to one end of the shell (18). Multiple through holes (26) are opened on one side of the inner wall of the cylinder (25). The cylinder (25) communicates with the mounting groove (21) through the through holes (26). The mounting groove (21) is filled with non-Newtonian fluid that is pushed by the push plate (23) through the through holes (26) and enters the shell (18). A groove (19) is opened on one side of the outer wall of the shell (18). A lifting motor (20) is bolted to the top of the inner wall of the groove (19). The output end of the lifting motor (20) is installed together with the lifting screw (22) through a coupling.

2. The anti-fall device for a permanent magnet synchronous freight elevator according to claim 1, characterized in that, The mounting shaft (5) is externally mounted with a traction wheel (6) via a flat key, and the traction wheel (6) is located inside the mounting frame (4).

3. The anti-fall device for a permanent magnet synchronous freight elevator according to claim 1, characterized in that, The brake stop assembly (2) includes a mounting shell (9), a motor groove (10) is provided on one side of the outer wall of the mounting shell (9), and a sliding groove (15) is provided inside the mounting shell (9).

4. The anti-fall device for a permanent magnet synchronous freight elevator according to claim 3, characterized in that, An adjusting screw (16) is installed at the center of the bottom of the inner wall of the slide groove (15) via a bearing. A connecting block (17) is slidably inserted inside the slide groove (15), and the connecting block (17) is threadedly connected to the adjusting screw (16).

5. The anti-fall device for a permanent magnet synchronous freight elevator according to claim 4, characterized in that, The top of the connecting block (17) is integrally formed with a base block (12), and an embedding groove (13) is provided on one side of the outer wall of the base block (12). A brake pad (14) is slidably installed inside the embedding groove (13).

6. The anti-fall device for a permanent magnet synchronous freight elevator according to claim 4, characterized in that, An adjusting motor (11) is bolted to the top of the inner wall of the motor slot (10), and the output end of the adjusting motor (11) is connected to the adjusting screw (16) via a coupling.

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