Anti-falling mechanism of short-layer large-tonnage goods elevator without machine room

By introducing heat dissipation components and roller-driven fan blade structures into the fall protection mechanism of a low-rise, high-tonnage, machine-room-less freight elevator, the high-temperature problem during high-speed braking is solved, improving braking reliability and service life, and adapting to the space compactness requirements of machine-room-less freight elevators.

CN223936028UActive Publication Date: 2026-02-24CHANGSHU TORIN ELEVATOR FACTORY
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Patent Information

Application Number
CN202520357682.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-04
Publication Date
2026-02-24
Estimated Expiration
2035-03-04

AI Technical Summary

Technical Problem

Existing fall protection mechanisms generate high temperatures due to friction during high-speed braking, leading to material wear and structural deformation. Furthermore, the space compactness requirements of machine room-less freight elevators conflict with heat dissipation needs, resulting in insufficient heat dissipation and the risk of secondary falls.

Method used

A fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator was designed. The mechanism uses a heat dissipation component including a heat dissipation cavity and a heat dissipation fan blade. The fan blade is driven to rotate by the rolling action of rollers and elevator guide rails, thereby achieving forced heat dissipation of the brake caliper. The mechanism is combined with elastic elements and recessed structures to enhance friction and heat dissipation.

Benefits of technology

It effectively improves the service life of brake calipers, ensures braking reliability, avoids structural deformation and secondary fall risks caused by high temperature, and adapts to the space constraints of low-rise structures.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an anti-falling mechanism of a short-layer large-tonnage goods elevator without a machine room. The anti-falling mechanism comprises a clamp seat, a notch and a brake caliper, wherein the clamp seat is mounted on an elevator car; the notch is formed in one side of the clamp seat and corresponds to an elevator guide rail; a brake block is arranged on one side of the brake caliper, a heat dissipation assembly is arranged on the brake caliper and comprises a heat dissipation cavity formed in the inner side of the brake caliper, through holes are formed in the side wall of the heat dissipation cavity, heat dissipation fan blades are rotationally arranged on the inner side of the end of the brake caliper, and the mounting area of the heat dissipation fan blades communicates with the heat dissipation cavity. According to the anti-falling mechanism of the short-layer large-tonnage goods elevator without the machine room, forced heat dissipation of a brake caliper area can be automatically achieved through the arranged heat dissipation assembly according to tight holding of the brake caliper on the elevator guide rail, contact between the rolling wheels and the elevator guide rail is kept after braking is finished, cooling of the brake caliper is accelerated, and the service life is prolonged.
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Description

Technical Field

[0001] This utility model relates to the field of elevator auxiliary devices, and in particular to a fall prevention mechanism for a low-rise, high-tonnage freight elevator without a machine room. Background Technology

[0002] Existing fall arrest mechanisms are typically integrated with the car frame, using a safety clamp to apply frictional clamping force to the elevator guide rails to achieve braking. However, during high-speed braking of freight elevators, the instantaneous high temperature generated by the friction between the safety clamp and the guide rail can reach hundreds of degrees Celsius. Traditional designs rely on natural heat dissipation and lack an active cooling mechanism, which leads to accelerated wear of the safety clamp friction materials due to high temperatures, reducing braking reliability. At the same time, thermal expansion can easily cause guide rail deformation or clamp body structural deformation, affecting the accuracy of repeated braking. Under prolonged high-temperature environments, the metal components of the braking mechanism are prone to fatigue failure, shortening their service life.

[0003] In addition, due to the lack of a machine room, the fall protection mechanism of the machine room-less freight elevator needs to be directly embedded in the car frame or shaft wall, which requires extremely high space compactness. Existing natural heat dissipation solutions require a large heat dissipation area, which conflicts with the low-rise structure design of the freight elevator. In some existing technologies, insufficient heat dissipation even causes the safety clamp to fail due to annealing, leading to the risk of secondary falls.

[0004] Therefore, it is necessary to propose a fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator to solve the above problems. Utility Model Content

[0005] The main purpose of this utility model is to provide a fall prevention mechanism for a low-rise, high-tonnage, machine-room-less freight elevator, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator includes a clamp seat installed on the elevator car, a notch located on one side of the clamp seat and corresponding to the elevator guide rail, and a brake clamp located on the side of the notch for gripping the elevator guide rail.

[0008] A brake block is provided on one side of the brake caliper, and a heat dissipation assembly is provided on the brake caliper. The heat dissipation assembly includes a heat dissipation cavity disposed inside the brake caliper, and a through hole is provided on the side wall of the heat dissipation cavity. A heat dissipation fan blade is rotatably disposed on the inner side of the end of the brake caliper, and the mounting area of ​​the heat dissipation fan blade is connected to the heat dissipation cavity. A roller frame corresponding to the heat dissipation fan blade is movably disposed on the end of the brake caliper near the brake block. A roller for rolling cooperation with the elevator guide rail is rotatably disposed on the end of the roller frame away from the heat dissipation fan blade. A drive component for driving the heat dissipation fan blade to rotate is provided on the roller frame.

[0009] Preferably, the driving component includes a mounting cavity disposed on the inner side of the roller frame. Both ends of the mounting cavity are rotatably provided with first synchronous pulleys, and the first synchronous pulley away from the heat dissipation fan blade is fixed to the end of the roller, thereby rotating synchronously with the roller. A first synchronous belt is provided on the two first synchronous pulleys. A driving pulley is provided at the end of the first synchronous pulley near the heat dissipation fan blade. A corresponding second synchronous pulley is provided on one side of the heat dissipation fan blade and the side of the heat dissipation fan blade near the roller frame. A driven pulley is provided at the end of the second synchronous pulley near the roller frame. A second synchronous belt is provided on the two second synchronous pulleys. The driven pulley corresponds to and is adapted to the driving pulley.

[0010] Preferably, the inner side of the end of the brake caliper is provided with a groove corresponding to the roller frame, and one side of the roller frame is provided with a pressing block that is movably connected to the groove. An elastic element is provided between the side of the pressing block near the heat dissipation fan blade and the side of the inner cavity of the groove near the heat dissipation fan blade, and in the initial state, one side of the roller protrudes from the side wall of the brake block.

[0011] Preferably, the brake block has recesses evenly distributed on its side surface.

[0012] Preferably, the side wall of the brake caliper end is fitted with a dustproof mesh corresponding to the cooling fan blades.

[0013] Preferably, the caliper seat is provided with a drive mechanism for driving the displacement of the brake caliper. The drive mechanism includes a mounting groove disposed on the side wall of the recess, a first linear guide rail is vertically disposed at the inner end of the mounting groove, a drive block is vertically movably connected to the first linear guide rail, the brake caliper is inclinedly engaged with the opposite side of the drive block, and a second linear guide rail is disposed on the side of the brake caliper near the drive block. The side of the drive block near the brake caliper is movably connected to the second linear guide rail. A traction frame is disposed on one side of the two drive blocks, a through groove corresponding to the traction frame is disposed on one side of the caliper seat, one end of the traction frame is movably connected to the through groove, and a traction column for driving the traction frame to rise and fall is disposed at the upper end of the traction frame.

[0014] Compared with the prior art, this utility model provides a fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator, which has the following beneficial effects:

[0015] The fall protection mechanism of this low-rise, high-tonnage, machine-room-less freight elevator can automatically achieve forced heat dissipation of the brake caliper area based on the tightness of the brake caliper against the elevator guide rail through the heat dissipation components. After braking, the rollers are kept in contact with the elevator guide rail, which accelerates the cooling of the brake caliper and extends its service life. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0018] Figure 3 This is a structural diagram of the brake caliper, caliper seat, and traction frame of this utility model in their disassembled state;

[0019] Figure 4 This is a structural diagram of the drive block and brake caliper of this utility model in their disassembled state;

[0020] Figure 5 This is a schematic cross-sectional view of the end of the brake caliper of this utility model.

[0021] In the diagram: 1. Clamp seat; 2. Traction column; 3. Recess; 4. Brake caliper; 5. Brake block; 6. Roller; 7. Traction frame; 8. Through groove; 9. Mounting groove; 10. First linear guide rail; 11. Drive block; 12. Second linear guide rail; 13. Heat dissipation cavity; 14. Recess; 15. Through hole; 16. Dustproof net; 17. Roller frame; 18. Mounting cavity; 19. First synchronous pulley; 20. First synchronous belt; 21. Groove; 22. Extrusion block; 23. Elastic element; 24. Drive wheel; 25. Heat dissipation fan blade; 26. Second synchronous pulley; 27. Driven wheel; 28. Second synchronous belt. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] like Figure 1-5 As shown, a fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator includes a clamp seat 1 installed on the elevator car, a recess 3 located on one side of the clamp seat 1 and corresponding to the elevator guide rail, and a brake caliper 4 located on the side of the recess 3 for gripping the elevator guide rail. The clamp seat 1 is equipped with a drive mechanism for displacing the brake caliper 4. The drive mechanism includes a mounting groove 9 located on the side wall of the recess 3. A first linear guide rail 10 is vertically mounted at the inner end of the mounting groove 9. A drive block 11 is vertically and movably connected to the first linear guide rail 10. The brake caliper 4 is connected to the drive block 11. The two drive blocks 11 are equipped with a traction frame 7 on one side and a through groove 8 corresponding to the traction frame 7 on one side. One end of the traction frame 7 is movably connected to the through groove 8. The upper end of the traction frame 7 is equipped with a traction column 2 for driving the traction frame 7 to rise and fall. The traction column 2 is connected to the safety triggering device of the elevator. The safety triggering device can drive the traction column 2 to rise and fall.

[0024] Furthermore, to achieve forced heat dissipation, a brake block 5 is provided on one side of the brake caliper 4. A heat dissipation assembly is provided on the brake caliper 4, including a heat dissipation cavity 13 located inside the brake caliper 4. The side wall of the heat dissipation cavity 13 has a through hole 15. A heat dissipation fan blade 25 is rotatably mounted on the inner side of the end of the brake caliper 4, and the mounting area of ​​the heat dissipation fan blade 25 communicates with the heat dissipation cavity 13. A roller frame 17 corresponding to the heat dissipation fan blade 25 is movably mounted on the end of the brake caliper 4 near the brake block 5. A roller 6 for rolling cooperation with the elevator guide rail is rotatably mounted on the end of the roller frame 17 away from the heat dissipation fan blade 25. A driving component for driving the heat dissipation fan blade 25 to rotate is provided on the roller frame 17. The driving component includes a mounting cavity 18 located on the inner side of the roller frame 17. The inner cavity of the mounting cavity 18... Both ends are equipped with first synchronous pulleys 19, and the first synchronous pulley 19 at the end away from the cooling fan blade 25 is fixed to the end of the roller 6 so that it rotates synchronously with the roller 6. The two first synchronous pulleys 19 are equipped with first synchronous belts 20. The end of the first synchronous pulley 19 near the cooling fan blade 25 is equipped with a driving pulley 24. The side of the cooling fan blade 25 and the side of the cooling fan blade 25 near the roller frame 17 are equipped with corresponding second synchronous pulleys 26. The end of the second synchronous pulley 26 near the roller frame 17 is equipped with a driven pulley 27. The two second synchronous pulleys 26 are equipped with second synchronous belts 28. The driven pulley 27 corresponds to and is adapted to the driving pulley 24. The side wall of the brake caliper 4 is embedded with a dustproof net 16 corresponding to the cooling fan blade 25 to prevent dust from entering the heat dissipation cavity 13.

[0025] To facilitate the reset of the roller 6, a groove 21 corresponding to the roller frame 17 is provided on the inner side of the end of the brake caliper 4. A pressing block 22 that is movably connected to the groove 21 is provided on one side of the roller frame 17. An elastic member 23 is provided between the side of the pressing block 22 near the heat dissipation fan blade 25 and the side of the inner cavity of the groove 21 near the heat dissipation fan blade 25. In the initial state, one side of the roller 6 protrudes from the side wall of the brake block 5.

[0026] In order to increase friction and provide some heat dissipation for the brake block 5, recesses 14 are evenly provided on the side of the brake block 5.

[0027] When braking is required during use, the elevator's safety trigger device presses down the traction column 2. The traction column 2 then moves the two drive blocks 11 downwards via the traction frame 7. The drive blocks 11, in the inclined plane engagement, drive the brake caliper 4 to approach the elevator guide rail. The brake caliper 4 then drives the brake block 5 to grip the elevator guide rail. The brake block 5 has multiple recesses 14, which increase the friction between the brake block 5 and the elevator guide rail, and the recesses 14 also provide some heat dissipation for the brake block 5. Before the brake block 5 contacts the elevator guide rail, the roller 6 contacts the elevator guide rail first, and then the roller 6 rotates. The roller 6 drives the first synchronous wheel 19 to rotate, and the first synchronous wheel 19 drives the drive wheel 24 to rotate. The roller 6 drives the roller frame 17 to move inwards, and the compression block 22 compresses the elastic element 23. The drive wheel 24 gradually approaches and engages with the driven wheel 27. The rotation of roller 6 can drive the driven roller 27 to rotate through the driving roller 24. The driven roller 27 drives the cooling fan blades 25 to rotate through the cooperation of the second synchronous belt 28 and the second synchronous pulley 26. The cooling fan blades 25 blow air into the cooling cavity 13. The outside air enters after being filtered through the dustproof net 16, which can prevent dust from entering. The air entering the cooling cavity 13 is discharged through the through hole 15. The air exchanges heat with the inner wall of the cooling cavity 13 and the hot air is discharged through the through hole 15, which forces the brake block 5 and brake caliper 4 to dissipate heat. A certain degree of heat dissipation can be carried out during the braking stage. Heat dissipation can also be carried out after braking. Specifically, after braking and resuming operation, the brake block 5 is separated from the elevator guide rail. The elastic element 23 first resets a certain distance, so that the roller 6 keeps in contact with the elevator guide rail. After running for a period of time, sufficient heat dissipation is achieved, and finally the roller 6 is completely separated from the elevator guide rail.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator, comprising a clamp seat (1) installed on the elevator car, a notch (3) located on one side of the clamp seat (1) and corresponding to the elevator guide rail, and a brake clamp (4) located on the side of the notch (3) for gripping the elevator guide rail. Its features are: A brake block (5) is provided on one side of the brake caliper (4). A heat dissipation assembly is provided on the brake caliper (4). The heat dissipation assembly includes a heat dissipation cavity (13) provided inside the brake caliper (4). A through hole (15) is provided on the side wall of the heat dissipation cavity (13). A heat dissipation fan blade (25) is rotatably provided on the inner side of the end of the brake caliper (4). The installation area of ​​the heat dissipation fan blade (25) is connected to the heat dissipation cavity (13). A roller frame (17) corresponding to the heat dissipation fan blade (25) is movably provided on the end of the brake caliper (4) near the brake block (5). A roller (6) for rolling cooperation with the elevator guide rail is rotatably provided on the end of the roller frame (17) away from the heat dissipation fan blade (25). A driving component for driving the heat dissipation fan blade (25) to rotate is provided on the roller frame (17).

2. The fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator according to claim 1, characterized in that: The driving component includes a mounting cavity (18) disposed on the inner side of the roller frame (17). Both ends of the mounting cavity (18) are rotatably provided with first synchronous wheels (19), and the first synchronous wheel (19) away from the heat dissipation fan blade (25) is fixed to the end of the roller (6) so as to rotate synchronously with the roller (6). The two first synchronous wheels (19) are provided with a first synchronous belt (20). The end of the first synchronous wheel (19) near the heat dissipation fan blade (25) is provided with a driving wheel (24). The side of the heat dissipation fan blade (25) and the side of the heat dissipation fan blade (25) near the roller frame (17) are provided with corresponding second synchronous wheels (26). The end of the second synchronous wheel (26) near the roller frame (17) is provided with a driven wheel (27). The two second synchronous wheels (26) are provided with a second synchronous belt (28). The driven wheel (27) corresponds to and is adapted to the driving wheel (24).

3. The fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator according to claim 2, characterized in that: The inner side of the end of the brake caliper (4) is provided with a groove (21) corresponding to the roller frame (17). One side of the roller frame (17) is provided with a pressing block (22) that is movably connected to the groove (21). An elastic element (23) is provided between the side of the pressing block (22) near the heat dissipation fan blade (25) and the side of the inner cavity of the groove (21) near the heat dissipation fan blade (25). In the initial state, one side of the roller (6) protrudes from the side wall of the brake block (5).

4. The fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator according to claim 1, characterized in that: The brake block (5) has recesses (14) evenly distributed on its side.

5. The fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator according to claim 1, characterized in that: The side wall of the brake caliper (4) is fitted with a dustproof mesh (16) corresponding to the heat dissipation fan blade (25).

6. The fall protection mechanism for a low-rise, high-tonnage, machine-room-less freight elevator according to any one of claims 1-5, characterized in that: The caliper seat (1) is provided with a drive mechanism for driving the displacement of the brake caliper (4). The drive mechanism includes a mounting groove (9) provided on the side wall of the recess (3). A first linear guide rail (10) is vertically provided at the inner end of the mounting groove (9). A drive block (11) is vertically movably connected to the first linear guide rail (10). The brake caliper (4) and the drive block (11) are inclinedly engaged on opposite sides. A second linear guide rail (12) is provided on the side of the brake caliper (4) near the drive block (11). The side of the drive block (11) near the brake caliper (4) is movably connected to the second linear guide rail (12). A traction frame (7) is provided on one side of the two drive blocks (11). A through groove (8) corresponding to the traction frame (7) is provided on one side of the caliper seat (1). One end of the traction frame (7) is movably connected to the through groove (8). A traction column (2) for driving the traction frame (7) to rise and fall is provided at the upper end of the traction frame (7).