A power-off safety gear for elevator protection

Abstract

This application belongs to the field of elevator manufacturing technology, specifically a power-off safety clamp for elevator protection. It includes a mounting base with a mating groove on its upper part. A mounting plate a is fixedly connected to the upper left side of the mounting base, and a swing plate is rotatably connected to the lower part of the mounting plate a. A push groove is provided on the left side of the swing plate. In this application, the action of the brake wheel is controlled by the energization and de-energization of a DC electromagnet. When the elevator loses power or an abnormal situation occurs, the DC electromagnet loses power, the magnetic force disappears, the compression spring pushes the moving rod forward, the fixed rod slides in the guide groove b, causing the swing plate to rotate. The push groove of the swing plate pushes the brake wheel to slide along the guide groove a, engaging with the inclined surface on the right side of the mating groove, quickly achieving brake braking. The response speed is fast, effectively dealing with emergencies, improving the safety of elevator operation, with a simple structure, convenient maintenance, and reduced operating costs.

Description

Technical Field

[0001] This application belongs to the field of elevator manufacturing technology, specifically a power-off safety clamp for elevator protection. Background Technology

[0002] As an indispensable vertical transportation tool in modern high-rise buildings, the safety of elevators is of paramount importance. The safety brake is one of the key components of the elevator safety protection system. In the event of an accident (such as overspeeding, rope breakage, etc.), the safety brake can act quickly to stop the car on the guide rails, preventing the elevator from falling or overshooting, thereby ensuring the safety of passengers and the integrity of the equipment.

[0003] Currently, the most common safety clamps on the market include progressive safety clamps and instantaneous safety clamps. They mostly rely on mechanical inertia triggering (such as centrifugal block overspeed triggering). The transmission chain includes multiple mechanical components such as speed governor, pull rod, and clamp block. When the elevator suddenly loses power or overspeeds, the accumulated gaps and friction losses in the mechanical transmission chain will lead to braking delay. Therefore, a power failure safety clamp for elevator protection is proposed to solve the above problems. Utility Model Content

[0004] The purpose of this application is to address the shortcomings of existing technologies by designing a power-off safety clamp for elevator protection, which controls the action of the brake wheel by controlling the energization and de-energization of a DC electromagnet. This solves the problems of long transmission chains and response delays caused by the reliance on mechanical inertia triggering in traditional safety clamps.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A power-off safety clamp for elevator protection includes a mounting base. The upper part of the mounting base has a mating groove. A mounting plate a is fixedly connected to the upper left side of the mounting base. A swing plate is rotatably connected to the lower part of the mounting plate a. A push groove is formed on the left side of the swing plate. A guide groove b is formed through the right side of the swing plate. The upper part of the mounting plate a has a guide groove a through at an angle. A brake wheel is slidably connected to the inner wall of the guide groove a. The front side of the mounting base is fixedly connected to the mounting plate b. A DC electromagnet is fixedly connected to the right side of the mounting plate b. A fixing member is fixedly connected to the right side of the mounting base. A linear bearing is fixedly connected to the outer side of the fixing member via a snap-fit ​​component. The snap-fit ​​component is fixed to the inner wall of the fixing member via a disassembly auxiliary component. A moving rod is slidably connected to the inner wall of the linear bearing. A fixing rod that slides on the inner wall of the guide groove b is fixedly connected to the upper part of the moving rod. Baffles are installed on the outer side of the moving rod and the front side of the linear bearing. A compression spring is provided between the two sets of baffles.

[0007] Preferably, a housing is fixedly connected to the right side of the mounting plate a, a through groove is provided on the rear side of the housing, the brake wheel slides on the inclined surface on the right side of the mating groove, and the front side of the moving rod contacts the rear side of the DC electromagnet output end.

[0008] Preferably, the inclination angle of the guide groove a is the same as the inclination angle of the right side of the mating groove.

[0009] Preferably, the push groove is configured as a U-shaped groove.

[0010] Preferably, the left side of both sets of baffles is configured as a vertical surface.

[0011] Preferably, a mounting component is fixedly connected to the rear side of the movable rod, and a guide rod is fixedly connected to the left side of the mounting component. The outer side of the guide rod slides through the inner wall of the mounting component.

[0012] Preferably, the disassembly auxiliary component is fixed to the inner wall of the fixing member. The disassembly auxiliary component includes a wing bolt, which is vertically and rotatably connected to the inner wall of the fixing member. The lower part of the wing bolt is threadedly connected to a limiting plate, which is slidably connected to the inner wall of the fixing member. A slot is provided on the outer side of the snap-fit ​​component, and the limiting plate engages with the slot.

[0013] Preferably, a sliding column is vertically fixed to the inner wall of the fixing member, and the sliding column slides through the inner wall of the limiting plate.

[0014] This application has the following beneficial effects:

[0015] 1. This application controls the action of the brake wheel by controlling the energization and de-energization of a DC electromagnet. When the elevator loses power or an abnormal situation occurs, the DC electromagnet loses power and the magnetic force disappears. The compression spring pushes the moving rod forward, and the fixed rod slides in the guide groove b, causing the swing plate to rotate. The push groove of the swing plate pushes the brake wheel to slide along the guide groove a, which cooperates with the inclined surface on the right side of the mating groove to quickly realize the holding brake. The response speed is fast, which can effectively deal with emergencies, improve the safety of elevator operation, and has a simple structure, convenient maintenance, and reduced operating costs.

[0016] 2. This application provides a disassembly auxiliary component, including a wing bolt, a limiting plate, and a slot. During disassembly and maintenance, rotating the wing bolt separates the limiting plate from the slot of the snap-fit ​​component, allowing for easy disassembly of the snap-fit ​​component. This facilitates the maintenance or replacement of components such as linear bearings and moving rods, making daily maintenance and repair of the safety clamp more convenient and improving maintenance efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure in this application;

[0018] Figure 2This is an exploded view of the application.

[0019] Figure 3 This is a schematic diagram of the structure of the baffle and compression spring in this application;

[0020] Figure 4 This is a schematic diagram of the disassembled fastener and snap-fit ​​component in this application;

[0021] Figure 5 This is a schematic diagram of the disassembled structure of the disassembly auxiliary component in this application.

[0022] The components include: 1. Mounting base; 2. Mating groove; 3. Mounting plate a; 4. Housing; 5. Guide groove a; 6. Brake wheel; 7. Mounting plate b; 8. DC electromagnet; 9. Fixing component; 10. Snap-fit ​​component; 11. Linear bearing; 12. Moving rod; 13. Fixing rod; 14. Swing plate; 15. Push groove; 16. Guide groove b; 17. Baffle; 18. Compression spring; 19. Mounting component; 20. Disassembly auxiliary component; 201. Wing bolt; 202. Limiting plate; 203. Snap-fit ​​groove; 21. Guide rod. Detailed Implementation

[0023] like Figure 1-5 As shown, a power-off safety clamp for elevator protection includes a mounting base 1, which serves as the basic support component for the entire safety clamp and allows the power-off safety clamp to be installed on the elevator car. The upper part of the mounting base 1 has a mating groove 2 for placing the car guide rail. A mounting plate a3 is fixedly connected to the upper left side of the mounting base 1 to limit the upper part of the brake wheel 6. The lower part of the mounting plate a3 is rotatably connected to a swing plate 14, which is a transmission component connecting the fixed rod 13 and the brake wheel 6. When the swing plate 14 rotates, the push groove 15 pushes the brake wheel 6 to slide along the guide groove a5, thereby braking or releasing the brake wheel 6. The rotation of the swing plate 14 transmits the movement of the fixed rod 13 to the brake wheel 6, completing the braking action of the safety clamp.

[0024] like Figure 2 and Figure 3As shown, a push groove 15 is provided on the left side of the swing plate 14. The push groove 15 is designed as a U-shaped groove. The U-shaped groove design can reliably contact the brake wheel 6, ensuring the pushing action of the push groove 15 on the brake wheel 6 and ensuring the effectiveness of the braking action. The push groove 15 cooperates with the guide groove a5 to lock the position of the brake wheel 6. A guide groove b16 is provided through the right side of the swing plate 14 to provide space for the vertical movement of the fixed rod 13. At the same time, when the fixed rod 13 moves, it can drive the swing plate 14 to swing. A guide groove a5 is provided through the upper part of the mounting plate a3 at an angle. The inclined surface of the guide groove a5 and the mating groove 2 can cooperate to... The brake wheel 6 is guided to ensure that it can accurately engage with the inclined surface on the right side of the mating groove 2 during sliding, thereby generating effective braking force. The guide groove a5 ensures the movement trajectory of the brake wheel 6, so that the braking action can be performed in a predetermined manner. The brake wheel 6 is slidably connected to the inner wall of the guide groove a5, and the surface is provided with rough texture. The elevator is stopped on the guide rail by friction, which plays a safety protection role in preventing the elevator from falling and overspeeding. The inner side of the push groove 15 contacts the outer side of the brake wheel 6. The front side of the mounting base 1 is fixedly connected to the mounting plate b7, which is set in an L shape, for fixing the DC electromagnet 8.

[0025] like Figures 2-4 As shown, a DC electromagnet 8, model MQ8, is fixedly connected to the right side of the mounting plate b7. The energization and de-energization of the DC electromagnet 8 are controlled by the control terminal in the elevator car. When energized, it generates magnetic force, and its output end pushes the moving rod 12 to move backward. This drives the swing plate 14 to rotate through the fixed rod 13, so that the brake wheel 6 is in a non-braking state, and the elevator operates normally. When de-energized, the magnetic force disappears, and its output end releases the support of the moving rod 12. The moving rod 12 moves forward under the action of the compression spring 18, driving the swing plate 14 to rotate and pushing the brake wheel 6 to achieve the holding brake. The energization and de-energization state of the DC electromagnet 8 controls the working state of the safety clamp, realizing the function of de-energized trigger braking. When the DC electromagnet 8 is re-energized, its output end can directly press against the moving rod 12, so that the brake wheel 6 is reset. A fixing part 9 is fixedly connected to the right side of the mounting base 1. It is installed on the surface of the mounting base 1 by screws and is used to install components such as the linear bearing 11, the snap-fit ​​part 10, and the disassembly auxiliary component 20.

[0026] like Figures 2-4As shown, a linear bearing 11 is fixedly connected to the outer side of the fixing member 9 via a snap-fit ​​member 10, providing low-friction guidance for the linear movement of the moving rod 12. This allows the moving rod 12 to slide smoothly within the linear bearing 11, reducing resistance and wear during movement and ensuring the flexibility and reliability of the moving rod 12's operation. This, in turn, ensures that the braking action of the safety clamp can be achieved in a timely and accurate manner. The snap-fit ​​member 10 is fixed to the inner wall of the fixing member 9 via a disassembly auxiliary component 20. The disassembly auxiliary component 20 can quickly release the limiting effect on the snap-fit ​​member 10, allowing the snap-fit ​​member 10 to quickly disengage from the fixing member 9. The wall is pulled out, and the linear bearing 11 is quickly disassembled for maintenance. The inner wall of the linear bearing 11 is slidably connected to the moving rod 12, which is a key transmission component connecting the DC electromagnet 8 and the swing plate 14. The upper part of the moving rod 12 is fixedly connected to the fixed rod 13, which slides on the inner wall of the guide groove b16 and is vertically set. When the moving rod 12 moves back and forth, the fixed rod 13 slides in the guide groove b16, which drives the swing plate 14 to rotate around its rotation connection point with the mounting plate a3. This causes the push groove 15 of the swing plate 14 to push the brake wheel 6 to move, realizing the switching between the braking and release states of the brake wheel 6.

[0027] like Figures 2-4 As shown, baffles 17 are installed on the outer side of the moving rod 12 and the front side of the linear bearing 11 to support the two ends of the compression spring 18. The compression spring 18 is arranged between the two sets of baffles 17. When the DC electromagnet 8 is energized, the compression spring 18 is compressed and stores elastic potential energy. When the DC electromagnet 8 is de-energized, the compression spring 18 releases elastic potential energy, pushing the moving rod 12 forward, driving the fixed rod 13 and the swing plate 14 to move, so that the brake wheel 6 can achieve brake engagement. The compression spring 18 provides power for the reset of the moving rod 12 and is a key elastic component for the safety clamp to achieve the power failure trigger braking function. It ensures that the moving rod 12 can be quickly pushed to move in the event of power failure, so as to achieve rapid braking. At the same time, the compression spring 18 can be replaced simultaneously through the disassembly and maintenance of the linear bearing 11, preventing problems such as fatigue, weakening of elasticity or breakage of the compression spring 18 due to long-term use. This ensures that the safety clamp can rely on the compression spring 18 to provide sufficient reset power to push the moving rod 12 to move in time when power fails, thus ensuring the reliability of the braking function.

[0028] like Figures 2-4As shown, a housing 4 is fixedly connected to the right side of the mounting plate a3. A through slot is provided on the rear side of the housing 4 to provide movement space for the moving rod 12. The brake wheel 6 slides on the inclined surface on the right side of the mating groove 2. The front side of the moving rod 12 contacts the rear side of the output end of the DC electromagnet 8. The left side of the two sets of baffles 17 is set as a vertical surface to prevent it from affecting the operation of the guide rod 21. A mounting part 19 is fixedly connected to the rear side of the moving rod 12 and the guide rod 21 is fixed by screws. The guide rod 21 is fixedly connected to the left side of the mounting part 19. The outer side of the guide rod 21 slides through the inner wall of the fixing part 9. The guide rod 21 provides stable support for the moving rod 12 and prevents the moving rod 12 from rotating.

[0029] like Figures 3-5 As shown, the disassembly auxiliary component 20 is fixed to the inner wall of the fixing member 9. The disassembly auxiliary component 20 includes a wing bolt 201. Maintenance personnel can directly rotate the wing bolt 201 to move the limiting plate 202. At the same time, a rubber pad is provided between the wing bolt 201 and the fixing member 9. After locking the limiting plate 202, it can prevent the wing bolt 201 from loosening. The wing bolt 201 is vertically inserted and rotatably connected to the inner wall of the fixing member 9. The lower part of the wing bolt 201 is threadedly connected to the limiting plate 202. The limiting plate 202 is slidably connected to the inner wall of the fixing member 9. The outer side of the snap-fit ​​member 10 is provided with a snap-fit ​​groove 203. The limiting plate 202 and the snap-fit ​​groove 203 are snap-fitted together. By the snap-fit ​​between the limiting plate 202 and the snap-fit ​​groove 203, the snap-fit ​​member 10 is fixed and locked to the inner wall of the fixing member 9. The protrusions at the front and rear ends of the linear bearing 11 are fixed. A sliding column is vertically fixed to the inner wall of the fixing member 9. The sliding column slides through the inner wall of the limiting plate 202 and guides the limiting plate 202.

[0030] When the elevator is in normal operation, the DC electromagnet 8 is energized and generates magnetic force. Its output end pushes the moving rod 12 to move backward. When the moving rod 12 moves backward, it drives the outer baffle 17 to move, compressing the compression spring 18 between the two sets of baffles 17, so that the compression spring 18 stores elastic potential energy. The fixed rod 13 on the upper part of the moving rod 12 slides in the guide groove b16, driving the swing plate 14 to rotate around its rotation connection point with the mounting plate a3. After the swing plate 14 rotates, the push groove 15 on its left side no longer pushes the brake wheel 6. The brake wheel 6 is in a non-braking position in the guide groove a5 and does not contact the inclined surface on the right side of the mating groove 2. The elevator operates normally.

[0031] When the elevator experiences abnormal conditions such as power failure, overspeed, or rope breakage, the DC electromagnet 8 loses power, its magnetic force disappears, and the output end releases support for the moving rod 12. The compressed spring 18 releases its stored elastic potential energy, pushing the moving rod 12 forward. As the moving rod 12 moves forward, the fixed rod 13 slides in the guide groove b16, causing the left side of the swing plate 14 to rotate in the opposite direction. The inner side of the U-shaped push groove 15 on the left side of the swing plate 14 contacts the outer side of the brake wheel 6 and pushes the brake wheel 6 to slide along the guide groove a5. The brake wheel 6 and the right inclined surface of the mating groove 2 tightly push the brake wheel 6 to the guide rail. Through the friction generated between the rough texture of the brake wheel 6 surface and the car guide rail, the elevator car is stopped on the guide rail, achieving safe braking.

[0032] After elevator maintenance is completed, the DC electromagnet 8 is re-energized, and its output end can directly press against the moving rod 12, pushing the moving rod 12 to move backward. When the moving rod 12 moves backward, it drives the outer baffle 17 to move, compressing the compression spring 18 between the two sets of baffles 17. The compression spring 18 stores elastic potential energy and drives the swing plate 14 to rotate around its rotational connection point with the mounting plate a3, driving the brake wheel 6 to reset without the need for an additional reset structure. When maintenance or replacement of parts of the safety clamp is required, the wing bolt 201 is rotated, causing the limit plate 202 to slide on the sliding column on the inner wall of the fixing part 9, so that the limit plate 202 separates from the slot 203 on the outer side of the locking part 10. After the limit is released, the locking part 10 can be easily removed, and the linear bearing 11 can be removed from the fixing part 9. After the linear bearing 11 is removed, the compression spring 18 loses the limiting constraint of the baffle 17 and can be directly removed from the moving rod 12 for inspection or replacement. This allows for the replacement and maintenance of the compression spring 18, ensuring its reliable performance and guaranteeing that the safety clamp can work normally when power is lost.

Claims

1. A power-off safety clamp for elevator protection, comprising a mounting base (1), characterized in that: The upper part of the mounting base (1) is provided with a mating groove (2). The upper left side of the mounting base (1) is fixedly connected to a mounting plate a (3). The lower part of the mounting plate a (3) is rotatably connected to a swing plate (14). The left side of the swing plate (14) is provided with a push groove (15). The right side of the swing plate (14) is provided with a guide groove b (16). The upper part of the mounting plate a (3) is provided with a guide groove a (5). The inner wall of the guide groove a (5) is slidably connected to a brake wheel (6). The inner side of the push groove (15) contacts the outer side of the brake wheel (6). The front side of the mounting base (1) is fixedly connected to a mounting plate b (7). A DC electromagnet (8) is fixedly connected to the right side. A fixing member (9) is fixedly connected to the right side of the mounting base (1). A linear bearing (11) is fixedly connected to the outer side of the fixing member (9) through a snap-fit ​​member (10). The snap-fit ​​member (10) is fixed to the inner wall of the fixing member (9) through a disassembly auxiliary component (20). A moving rod (12) is slidably connected to the inner wall of the linear bearing (11). A fixing rod (13) that slides on the inner wall of the guide groove b (16) is fixedly connected to the upper part of the moving rod (12). Baffles (17) are installed on the outer side of the moving rod (12) and the front side of the linear bearing (11). A compression spring (18) is provided between the two sets of baffles (17).

2. The power-off safety clamp for elevator protection according to claim 1, characterized in that: The mounting plate a (3) is fixedly connected to the right side of the housing (4), and the rear side of the housing (4) is provided with a through groove. The brake wheel (6) slides on the right side of the inclined surface of the mating groove (2), and the front side of the moving rod (12) contacts the rear side of the output end of the DC electromagnet (8).

3. The power-off safety clamp for elevator protection according to claim 1, characterized in that: The tilt angle of the guide groove a (5) is the same as the tilt angle of the right side of the mating groove (2).

4. A power-off safety clamp for elevator protection according to claim 1, characterized in that: The push groove (15) is configured as a U-shaped groove.

5. A power-off safety clamp for elevator protection according to claim 1, characterized in that: The left side of both sets of baffles (17) is set as a vertical surface.

6. A power-off safety clamp for elevator protection according to claim 1, characterized in that: The rear side of the movable rod (12) is fixedly connected to the mounting part (19), and the left side of the mounting part (19) is fixedly connected to the guide rod (21). The outer side of the guide rod (21) slides through the inner wall of the fixing part (9).

7. A power-off safety clamp for elevator protection according to claim 1, characterized in that: The disassembly auxiliary component (20) is fixed to the inner wall of the fixing member (9). The disassembly auxiliary component (20) includes a wing bolt (201). The wing bolt (201) is vertically rotatably connected to the inner wall of the fixing member (9). The lower part of the wing bolt (201) is threadedly connected to a limiting plate (202). The limiting plate (202) is slidably connected to the inner wall of the fixing member (9). The outer side of the snap-fit ​​member (10) is provided with a snap-fit ​​groove (203). The limiting plate (202) is snap-fitted into the snap-fit ​​groove (203).

8. A power-off safety clamp for elevator protection according to claim 1, characterized in that: The inner wall of the fixing member (9) is vertically fixed with a sliding column, which slides through the inner wall of the limiting plate (202).

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