Elevator overspeed protection equipment

Abstract

The invention provides elevator overspeed protection equipment which comprises an elevator car, a protection assembly is installed on the outer side wall of the elevator car, and the protection assembly comprises a braking guide rail, a fixed seat, an installation seat, a double-end lead screw, two braking vanes, a braking motor and a sliding seat. The fixing base is fixedly connected to the rear surface of the lift car. When an elevator is overspeed, a brake motor drives a double-end lead screw to rotate, the double-end lead screw drives two brake plates through threads, the two brake plates get close to each other, the brake plates make contact with a brake guide rail through brake pads, then brake sudden stop of the lift car can be achieved, at the moment, the lift car generates huge inertia, the lift car drives a fixing base, and the lift car is driven to move upwards. The sliding seat slides in the fixed seat, the buffering and damping effects on the lift car can be achieved, brake type emergency stop is adopted, a damping mechanism is matched, the situation that people taking an elevator fall down or violently collide with inner wall plates of the lift car during emergency stop can be avoided, and the stability of the lift car during emergency stop is improved.

Description

Technical Field

[0001] The invention relates to a protection device, in particular to an elevator overspeed protection device, and belongs to the technical field of elevators. Background Art

[0002] Modern elevators usually use wire rope friction transmission. The wire rope is wrapped around the traction sheave, and the two ends are respectively connected to the car and the counterweight. The electric motor drives the traction sheave to make the car rise and fall. Elevators are required to be safe and reliable, have high transportation efficiency, accurate leveling and comfortable riding. With the development of real estate, elevators have exploded in growth, and with it comes the high rate of elevator accidents. Elevator safety has become a new hidden danger to urban public safety.

[0003] Elevator overspeed is a potential safety hazard during elevator operation. Once the elevator exceeds the speed limit, its safety device may automatically start and stop the elevator, which will not only cause inconvenience to passengers, but also cause panic and danger. Therefore, elevators are equipped with overspeed protection devices. Elevator overspeed protection equipment is an important part of the elevator safety system, which is designed to ensure the safety and stability of the elevator during operation.

[0004] A known Chinese public invention (publication number: CN113800356A) discloses a safety protection device and method for preventing overspeed of a car-type elevator, which drives an L-shaped adjustment plate to rotate by an adjustment motor, so that the L-shaped adjustment plate and the locking inner block form a buckle, thereby urgently fixing the elevator, so that the elevator no longer falls sharply, and the elevator can be fixed and stopped, so that passengers in the elevator are very safe; The L-shaped adjustment plate and the inner block form a buckle, which can realize the emergency stop protection of the elevator car in cooperation with the protective wall. However, in this process, the rapid emergency stop of the elevator car will generate huge inertia. Due to the effect of inertia, people riding the elevator may fall down during the emergency stop, or collide violently with the internal wall panel of the car and be injured, causing harm to the passengers. Therefore, an elevator overspeed protection device is proposed. Summary of the invention

[0005] In view of this, the present invention provides an elevator overspeed protection device to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is implemented as follows: an elevator overspeed protection device includes a car, the outer side wall of the car is installed with a protection component, the protection component includes a brake guide rail, a fixing seat, a mounting seat, a double-headed screw, two brake plates, two fixing rods, a damping rod, a support spring, a brake motor and a sliding seat; The fixed seat is fixedly connected to the rear surface of the car, the two brake plates are symmetrically and slidingly connected to the inner side walls of the mounting seat, the adjacent surfaces of the two brake plates are symmetrically and fixedly connected with brake pads, one end of the double-headed screw rod is fixedly connected to the output shaft of the brake motor, the two brake plates are symmetrically located on both sides of the brake guide rail, the sliding seat is fixedly connected to the front surface of the mounting seat, the sliding seat is slidably connected to the inside of the fixed seat, the two ends of the two fixed rods are symmetrically and fixedly connected to the inner top wall and inner bottom wall of the fixed seat, the support spring is sleeved on the outer side wall of the fixed rod, the top end of the damping rod is installed on the inner top wall of the fixed seat, and the bottom end of the damping rod is installed on the upper surface of the sliding seat.

[0007] Further preferably, the two brake plates are symmetrically threadedly connected to the outer side wall of the double-headed screw, the double-headed screw is rotatably connected to the inside of the mounting seat, and the brake motor is installed on one side of the mounting seat.

[0008] Further preferably, two guide rods are installed inside the mounting seat, the brake plate is slidably connected to the outer side walls of the guide rods, and a speed sensor and a controller are installed on the upper surface of the car.

[0009] Further preferably, the mounting seat is slidably connected to the outer side wall of the fixing rod, the top end of the support spring presses against the fixing seat, and the bottom end of the support spring presses against the sliding seat.

[0010] Further preferably, the protection assembly further comprises a locking tooth plate, two L-shaped mounting plates, a push plate, an adsorption plate, an electromagnet, two push rods and a return spring; The two L-shaped mounting plates are symmetrically fixedly connected to the two sides of the fixing seat, the locking tooth plate is fixedly connected to the push plate through the two push rods, the return spring is sleeved on the outer side wall of the push rod, the electromagnet is installed on the front surface of the L-shaped mounting plate, and the adsorption plate is installed on the rear surface of the push plate.

[0011] Further preferably, the position of the adsorption plate corresponds to the position of the electromagnet, and the push rod is slidably connected to the inside of the L-shaped mounting plate.

[0012] Further preferably, one end of the return spring presses against the push plate, and the other end of the return spring presses against the L-shaped mounting plate.

[0013] Further preferably, tooth grooves are symmetrically formed on the front surface of the brake guide rail, and the shape of the locking tooth plate is matched with the shape of the tooth grooves.

[0014] Further preferably, an elevator shaft is provided outside the car, a guide rail is installed on the inner side wall of the elevator shaft, a guide seat is installed on the outer side wall of the car, the car is slidably connected to the outer side wall of the guide rail through the guide seat, and the brake guide rail is fixedly connected to the inner rear wall of the elevator shaft.

[0015] Further preferably, a top plate is installed on the top of the inner wall of the elevator shaft, a traction motor is installed on the upper surface of the top plate, and the traction motor is fixedly connected to the car through a traction line.

[0016] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution: 1. The present invention monitors the running speed of the car through a speed sensor. When the elevator overspeeds, the speed sensor sends a signal to the controller. The controller controls the brake motor to work. The brake motor drives the double-headed screw to rotate. The double-headed screw drives two brake plates through threads. The two brake plates are close to each other. The brake plates contact the brake guide rails through brake pads, thereby realizing an emergency stop of the car. At this time, the car generates huge inertia, and the car drives the fixed seat, and the sliding seat slides in the fixed seat. At this time, with the cooperation of the support spring and the damping rod, the car can be buffered and shock-absorbing. Compared with the prior art, the present invention adopts a brake-type emergency stop and cooperates with a shock-absorbing mechanism, which can prevent people riding the elevator from falling down during an emergency stop, or from colliding violently with the internal wall panels of the car, thereby increasing the stability of the car during an emergency stop.

[0017] 2. The present invention sets a secondary locking mechanism. When the car stops suddenly, the adsorption plate is adsorbed by the electromagnet. The adsorption plate fits the electromagnet, and the adsorption plate drives the push plate. The push plate pushes the locking tooth plate through the push rod, so that the locking tooth plate can be engaged with the brake guide rail. At this time, the car can be locked, which effectively avoids the car from falling for the second time, and provides a guarantee for the safety of the elevator.

[0018] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1This is a structural diagram of an elevator overspeed protection device of the present invention; Figure 2 It is a structural diagram of the protection component of the present invention; Figure 3 It is a structural diagram of the guide seat of the present invention; Figure 4 It is a schematic diagram of the connection between the L-shaped mounting plate and the fixing seat of the present invention; Figure 5 This is a schematic diagram of disassembling the protection component of the present invention; Figure 6 It is a structural diagram of the mounting seat of the present invention; Figure 7 This is a structural diagram of an L-shaped mounting plate of the present invention; Figure 8 It is a schematic diagram of the installation position of the brake plate of the present invention.

[0021] 1. Brake plate; 2. Brake plate; 3. Brake guide rail; 4. Controller; 5. Speed ​​sensor; 6. Locking tooth plate; 7. L-shaped mounting plate; 8. Fixed seat; 9. Mounting seat; 10. Guide rod; 11. Double-headed screw rod; 12. Brake pad; 13. Brake plate; 14. Fixed rod; 15. Support spring; 16. Brake motor; 17. Push plate; 18. Adsorption plate; 19. Return spring; 20. Elevator shaft; 21. Traction motor; 22. Top plate; 23. Guide rail; 24. Guide seat. DETAILED DESCRIPTION

[0022] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0023] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] In the prior art, the rapid emergency stop of the elevator car will generate huge inertia. Due to the effect of inertia, the passengers may fall down or collide violently with the wall panels inside the car and get injured, which may cause harm to the passengers. To do this, see Figure 1-Figure 8 The embodiment of the present invention provides an elevator overspeed protection device, including a car 11, an outer wall of the car 11 is installed with a protection component 101, and the protection component 101 includes a brake guide rail 13, a fixing seat 18, a mounting seat 19, a double-headed screw 21, two brake plates 23, two fixing rods 25, a damping rod 26, a support spring 27, a brake motor 28 and a sliding seat 29; The fixed seat 18 is fixedly connected to the rear surface of the car 11, the two brake plates 23 are symmetrically slidably connected to the inner side wall of the mounting seat 19, the adjacent surfaces of the two brake plates 23 are symmetrically fixedly connected with brake pads 22, one end of the double-headed screw 21 is fixedly connected to the output shaft of the brake motor 28, the two brake plates 23 are symmetrically located on both sides of the brake guide rail 13, the sliding seat 29 is fixedly connected to the front surface of the mounting seat 19, the sliding seat 29 is slidably connected to the inside of the fixed seat 18, the two ends of the two fixed rods 25 are symmetrically fixedly connected to the inner top wall and the inner bottom wall of the fixed seat 18, the support spring 27 is sleeved on the outer side wall of the fixed rod 25, the top end of the damping rod 26 is installed on the inner top wall of the fixed seat 18, and the bottom end of the damping rod 26 is installed on the upper surface of the sliding seat 29; The protection component 101 is used to implement emergency stop protection when the elevator car 11 is overspeeding; When the car 11 is overspeeding, the brake motor 28 works. At this time, the two brake plates 23 are close to each other, and the brake plates 23 are in contact with the brake guide rail 13 through the brake pads 22. Under the friction between the brake pads 22 and the brake guide rail 13, the car 11 can be stopped quickly. Under the action of inertia, the car 11 generates huge inertia, and because the sliding seat 29 is slidably connected to the fixed seat 18, the sliding seat 29 slides in the fixed seat 18, the support spring 27 is compressed, and the damping rod 26 is compressed, thereby achieving buffering and shock absorption of the car 11, avoiding people riding the elevator from falling down during an emergency stop, or colliding violently with the internal wall panels of the car, thereby increasing the stability of the car 11 during an emergency stop.

[0025] In one embodiment, two brake plates 23 are symmetrically threadedly connected to the outer wall of the double-headed screw 21, the double-headed screw 21 is rotatably connected to the inside of the mounting seat 19, the brake motor 28 is installed on one side of the mounting seat 19, and two guide rods 20 are installed inside the mounting seat 19. The brake plates 23 are slidably connected to the outer wall of the guide rod 20, and the double-headed screw 21 is driven to rotate by the brake motor 28. The double-headed screw 21 drives the two brake plates 23 through threads, and the two brake plates 23 approach each other. The brake plates 23 contact the brake guide rail 13 through the brake pads 22, thereby achieving an emergency stop of the car 11.

[0026] In one embodiment, a speed sensor 15 and a controller 14 are installed on the upper surface of the car 11. The signal end of the speed sensor 15 is connected to the signal end of the controller 14, and the signal end of the controller 14 is connected to the signal end of the electromagnet 32 ​​and the brake motor 28. The model of the speed sensor 15 is: LIS2DH12TR, and the model of the controller 14 is: OHR-PR10; When the elevator is running, the speed sensor 15 monitors the running speed of the car 11. When the elevator is overspeeding, the speed sensor 15 sends a signal to the controller 14, and the controller 14 controls the brake motor 28 and the electromagnet 32 ​​to work respectively, so as to realize the emergency stop of the car 11.

[0027] In one embodiment, the mounting seat 19 is slidably connected to the outer side wall of the fixing rod 25, the top end of the support spring 27 presses against the fixing seat 18, and the bottom end of the support spring 27 presses against the sliding seat 29; The support spring 27 can support the car 11. When the car 11 stops suddenly, the car 11 drives the fixed seat 18, and the sliding seat 29 slides in the fixed seat 18. At this time, with the cooperation of the support spring 27 and the damping rod 26, the car 11 can be buffered and shock-absorbing.

[0028] In order to solve the problems existing in the prior art, an embodiment of the present invention provides an elevator overspeed protection device and solves the problems through the above technical solutions: The present invention monitors the running speed of the car 11 through the speed sensor 15. When the elevator is overspeeding, the speed sensor 15 sends a signal to the controller 14. The controller 14 controls the brake motor 28 to work. The brake motor 28 drives the double-headed screw 21 to rotate. The double-headed screw 21 drives two brake plates 23 through threads. The two brake plates 23 are close to each other. The brake plates 23 contact the brake guide rail 13 through the brake pads 22, and then the car 11 can be braked and stopped in an emergency. At this time, the car 11 generates huge inertia, and the car 11 drives the fixed seat 18, and the sliding seat 29 slides in the fixed seat 18. At this time, with the cooperation of the support spring 27 and the damping rod 26, the car 11 can be buffered and shock-absorbing, so as to avoid people riding the elevator from falling down during an emergency stop, or violently colliding with the internal wall panels of the car, thereby increasing the stability of the car 11 during an emergency stop.

[0029] In one embodiment, the protection assembly 101 further includes a locking tooth plate 16, two L-shaped mounting plates 17, a push plate 30, an adsorption plate 31, an electromagnet 32, two push rods 34 and a return spring 35; The two L-shaped mounting plates 17 are symmetrically fixedly connected to the two sides of the fixing seat 18, the locking tooth plate 16 is fixedly connected to the push plate 30 through two push rods 34, the return spring 35 is sleeved on the outer side wall of the push rod 34, the electromagnet 32 ​​is installed on the front surface of the L-shaped mounting plate 17, the adsorption plate 31 is installed on the rear surface of the push plate 30, the position of the adsorption plate 31 corresponds to the position of the electromagnet 32, and the push rod 34 is slidably connected to the inside of the L-shaped mounting plate 17; When the car 11 makes an emergency stop, the adsorption plate 31 is adsorbed by the electromagnet 32, and the adsorption plate 31 fits with the electromagnet 32. The adsorption plate 31 drives the push plate 30, and the push plate 30 pushes the locking tooth plate 16 through the push rod 34, so that the locking tooth plate 16 can be engaged with the brake guide rail 13. At this time, the car 11 can be locked to prevent the car 11 from falling again, thereby providing a guarantee for the safety of the elevator.

[0030] In one embodiment, one end of the return spring 35 presses against the push plate 30 , and the other end of the return spring 35 presses against the L-shaped mounting plate 17 . By pressing the return spring 35 against the push plate 30 , the locking tooth plate 16 can always be kept away from the brake guide rail 13 .

[0031] In one embodiment, the front surface of the brake guide rail 13 is symmetrically provided with tooth grooves 12, and the shape of the locking tooth plate 16 is adapted to the shape of the tooth groove 12. Then, when the electromagnet 32 ​​is working, under the push of the push plate 30, the locking tooth plate 16 engages with the tooth groove 12. At this time, the position of the car 11 can be locked for the second time, thereby preventing the car 11 from falling for the second time, thereby enhancing safety.

[0032] In one embodiment, an elevator shaft 40 is provided outside the car 11, a guide rail 43 is installed on the inner wall of the elevator shaft 40, a guide seat 44 is installed on the outer wall of the car 11, the car 11 is slidably connected to the outer wall of the guide rail 43 through the guide seat 44, the brake guide rail 13 is fixedly connected to the inner rear wall of the elevator shaft 40, a top plate 42 is installed on the top of the inner wall of the elevator shaft 40, a traction motor 41 is installed on the upper surface of the top plate 42, the traction motor 41 is fixedly connected to the car 11 through a traction line, when the elevator is running, the traction motor 41 pulls the car 11 through the traction rope, and the car 11 slides along the guide rail 43, thereby realizing stable lifting and lowering of the car 11.

[0033] When the present invention is working: when the elevator is running, the car 11 is pulled by the traction motor 41, and the running speed of the car 11 is monitored by the speed sensor 15. When the elevator is overspeeding, the speed sensor 15 sends a signal to the controller 14, and the controller 14 controls the brake motor 28 to work. The brake motor 28 drives the double-headed screw 21 to rotate, and the double-headed screw 21 drives two brake plates 23 through the thread. The two brake plates 23 are close to each other, and the brake plates 23 are in contact with the brake guide rail 13 through the brake pads 22, so that the car 11 can be braked to an emergency stop. At this time, the car 11 generates a huge Due to the large inertia, the car 11 drives the fixed seat 18, and the sliding seat 29 slides in the fixed seat 18. With the cooperation of the support spring 27 and the damping rod 26, the car 11 can be buffered and shock-absorbed. When the car 11 stops suddenly, the adsorption plate 31 is adsorbed by the electromagnet 32, and the adsorption plate 31 fits with the electromagnet 32. The adsorption plate 31 drives the push plate 30, and the push plate 30 pushes the locking tooth plate 16 through the push rod 34, so that the locking tooth plate 16 can be engaged with the brake guide rail 13. At this time, the car 11 can be locked to avoid the car 11 from falling again, which provides a guarantee for the safety of the elevator.

[0034] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An elevator overspeed protection device, comprising a car (11), characterized in that: The outer side wall of the car (11) is installed with a protection assembly (101), and the protection assembly (101) comprises a brake guide rail (13), a fixing seat (18), a mounting seat (19), a double-headed screw (21), two brake plates (23), two fixing rods (25), a damping rod (26), a supporting spring (27), a brake motor (28) and a sliding seat (29); The fixing seat (18) is fixedly connected to the rear surface of the car (11), the two brake plates (23) are symmetrically slidably connected to the inner wall of the mounting seat (19), the adjacent surfaces of the two brake plates (23) are symmetrically fixedly connected with brake pads (22), one end of the double-headed screw rod (21) is fixedly connected to the output shaft of the brake motor (28), the two brake plates (23) are symmetrically located on both sides of the brake guide rail (13), and the sliding seat (29) is fixedly connected to The front surface of the mounting seat (19), the sliding seat (29) is slidably connected to the interior of the fixing seat (18), the two ends of the two fixing rods (25) are symmetrically fixedly connected to the inner top wall and the inner bottom wall of the fixing seat (18), the supporting spring (27) is sleeved on the outer side wall of the fixing rod (25), the top end of the damping rod (26) is mounted on the inner top wall of the fixing seat (18), and the bottom end of the damping rod (26) is mounted on the upper surface of the sliding seat (29).

2. An elevator overspeed protection device according to claim 1, characterized in that: The two brake plates (23) are symmetrically threadedly connected to the outer wall of the double-ended screw (21); the double-ended screw (21) is rotatably connected to the inside of the mounting seat (19); and the brake motor (28) is installed on one side of the mounting seat (19).

3. An elevator overspeed protection device according to claim 2, characterized in that: Two guide rods (20) are installed inside the mounting seat (19), the brake plate (23) is slidably connected to the outer side walls of the guide rods (20), and a speed sensor (15) and a controller (14) are installed on the upper surface of the car (11).

4. An elevator overspeed protection device according to claim 3, characterized in that: The mounting seat (19) is slidably connected to the outer side wall of the fixing rod (25), the top end of the support spring (27) presses against the fixing seat (18), and the bottom end of the support spring (27) presses against the sliding seat (29).

5. An elevator overspeed protection device according to claim 4, characterized in that: The protection assembly (101) further comprises a locking tooth plate (16), two L-shaped mounting plates (17), a push plate (30), an adsorption plate (31), an electromagnet (32), two push rods (34) and a return spring (35); The two L-shaped mounting plates (17) are symmetrically fixedly connected to the two sides of the fixing seat (18); the locking tooth plate (16) is fixedly connected to the push plate (30) via the two push rods (34); the return spring (35) is sleeved on the outer side wall of the push rod (34); the electromagnet (32) is installed on the front surface of the L-shaped mounting plate (17); and the adsorption plate (31) is installed on the rear surface of the push plate (30).

6. An elevator overspeed protection device according to claim 5, characterized in that: The position of the adsorption plate (31) corresponds to the position of the electromagnet (32), and the push rod (34) is slidably connected to the inside of the L-shaped mounting plate (17).

7. An elevator overspeed protection device according to claim 6, characterized in that: One end of the return spring (35) bears against the push plate (30), and the other end of the return spring (35) bears against the L-shaped mounting plate (17).

8. An elevator overspeed protection device according to any one of claims 1 or 5, characterized in that: The front surface of the brake guide rail (13) is symmetrically provided with tooth grooves (12), and the shape of the locking tooth plate (16) is adapted to the shape of the tooth grooves (12).

9. An elevator overspeed protection device according to claim 3, characterized in that: An elevator shaft (40) is arranged outside the elevator car (11), a guide rail (43) is installed on the inner wall of the elevator shaft (40), a guide seat (44) is installed on the outer wall of the elevator car (11), the elevator car (11) is slidably connected to the outer wall of the guide rail (43) through the guide seat (44), and the brake guide rail (13) is fixedly connected to the inner rear wall of the elevator shaft (40).

10. An elevator overspeed protection device according to claim 9, characterized in that: A top plate (42) is installed on the top of the inner wall of the elevator shaft (40), a traction motor (41) is installed on the upper surface of the top plate (42), and the traction motor (41) is fixedly connected to the car (11) via a traction line.

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