Anti-falling protection brake motor

Abstract

The utility model relates to the technical field of elevator speed limiting protection devices, and discloses an anti-falling protection brake motor. An output shaft of the motor rotor is provided with a uniform speed device, the uniform speed device comprises an inner spline housing and an outer spline housing, and the inner spline housing is provided with a flail block; a pressure plate ring is embedded in one side of a pressure plate groove of the flail block, a bearing is arranged on the other side face of the pressure plate through a bearing seat, the bearing is installed in a pressure plate shell, and a first handle hole is formed in the pressure plate shell; a pressure spring groove is formed in the inner wall of the inner spline sleeve, and a pressure spring is arranged in the pressure spring groove and abuts against a limiting groove of the pressure plate; a second handle hole is formed in the friction shell. A handle is arranged in the handle hole I; the handle is matched with the pulling plate; a brake body is arranged on the output shaft and located between the motor rear end cover and the outer spline sleeve. The anti-falling safety protection device has the function of effective anti-falling safety protection when the elevator runs at the high altitude due to sudden failures. Meanwhile, the protection function is realized under the condition that a standby power supply does not need to be additionally configured. The utility model has the advantages of simplified structure and low cost.

Description

Technical Field

[0001] This utility model relates to the technical field of speed limiting protection devices for elevators, specifically to a fall protection braking motor. Background Technology

[0002] Rack and pinion lifts are the most widely used type of lift. Currently, lift applications include ordinary freight lifts, freight lifts, and intelligent freight lifts.

[0003] In the event of a sudden power outage, inverter failure, electrical control component failure, or motor failure, but while the elevator is in braking mode, the following procedures must be followed: ① For ordinary freight elevators, a professional must climb from the skylight of the elevator cage to the top. The manual release handle of the motor brake must be used to intermittently and very slowly lower the cage and load to the ground. However, continuous intermittent opening and closing of the motor brake will cause abnormal overheating, accelerated wear, and eventual failure, leading to an accident. ② For freight elevators, a professional maintenance worker must climb from the ground to the top of the elevator cage via the building's staircase. The manual release handle of the motor brake must be used to intermittently and very slowly lower the cage and load to the ground. Continuous intermittent opening and closing of the motor brake will cause abnormal overheating, accelerated wear, and eventual failure, leading to an accident. ③ For intelligent passenger and freight elevators, the cage and load can be safely returned to the ground by remotely controlling the backup power supply to connect to the power control system. However, this method has the following drawbacks: it cannot solve the failure scenarios of the frequency converter, main power control, and transmission system (i.e., it is only effective for failures caused by the main power supply failure). Moreover, the backup power supply has high maintenance costs and poor long-term reliability and maintainability.

[0004] Patent application CN119253928A discloses a fall arrest protection braking motor. In the event of a sudden malfunction, with no or insufficient power output from the power system and the braking system in a braking state, a linkage-type uniform speed braking safety protection function is triggered manually or electrically, causing the cage and load to descend at a set safe speed without damage to the ground. The linkage device is installed in the linkage hole of the friction housing via a steel sleeve. An oilless bearing is installed in the steel sleeve, and a connecting shaft is installed in the oilless bearing. An inner pull plate and an outer pull plate are respectively installed at both ends of the connecting shaft and secured with fixing screws. A passive shaft is installed in the passive hole of the inner pull plate, and a bearing is installed on the passive shaft. A washer and a retaining ring are installed at the tail of the passive shaft. A pull rod hole is opened on the outer pull plate, and a pull rod is installed in the pull rod hole via bolts. The pull rod and the release handle are connected by a transition seat. Its linkage device structure is relatively complex, resulting in high production costs. Utility Model Content

[0005] The technical problem this invention aims to solve is to provide a safety protection function that effectively prevents falls in the event of a sudden malfunction when the elevator is operating at height, and avoids accidents caused by abnormal wear of the motor brake. Furthermore, this protection function is achieved without the need for a separate backup power supply. This invention features a simplified structure and low cost.

[0006] To solve the above technical problems, this utility model provides a fall protection braking motor, including a motor rotor. The output shaft of the motor rotor passes through the rear end cover of the motor and is connected to a speed equalizer via a flat key. The speed equalizer includes an outer spline sleeve, an inner spline sleeve on the outer spline sleeve, and multiple evenly distributed throwing block seats on the inner spline sleeve. Throwing blocks are set on the throwing block seats. A pressure plate groove is formed on the throwing block, and a pressure plate ring is embedded in the pressure plate groove. The pressure plate ring is fixed to one side of the pressure plate. A bearing seat is set on the other side of the pressure plate, and a bearing is set on the bearing seat. The bearing is installed inside the pressure plate housing. A handle hole one is formed on the pressure plate housing. A compression spring groove is formed on the inner wall of the inner spline sleeve, and a compression spring is set in the compression spring groove. The compression spring rests in the limiting groove of the pressure plate. A handle hole two is formed on the friction housing. The handle hole one and handle hole two on the pressure plate housing are located on the same axis. A handle is set in handle hole one. The handle cooperates with a pull plate. A brake body is set on the output shaft, and the brake body is located between the rear end cover of the motor and the outer spline sleeve.

[0007] By adopting the above technical solution, when the elevator is in operation, the latch disengages from the handle, and the compression spring pushes the pressure plate away from the pressure plate groove. When the cage and load are in an overspeed falling state, the swing block is thrown against the inner wall of the friction shell by centrifugal force, and the friction generates torque, causing the cage and load to descend to the ground at a safe and uniform speed, avoiding injury and damage to personnel and equipment. When the elevator's power system is in a braking failure state, the brake motor can be manually released, allowing the elevator to lower the cage and load at a safe and uniform speed until they land on the ground without damage. This avoids accidents caused by the brake motor of the descent motor failing due to abnormal heat and accelerated wear due to continuous intermittent manual release operation, and eliminates the need for a separate backup power supply. When the speed controller is not needed, simply fasten the latch to the handle.

[0008] Preferably, friction plates are provided on the surface of the sling block, and there is an interval between the friction plates and the friction housing.

[0009] By adopting the above technical solution, braking torque is generated through friction between the friction plate and the friction shell under the action of centrifugal force, resulting in high braking efficiency.

[0010] Preferably, the pull plate is rotatably mounted on the friction housing.

[0011] By adopting the above technical solution, it is easy to attach the pull plate to the handle or detach it from the handle.

[0012] Preferably, a brake mounting plate is installed on the rear end cover of the motor, a brake disc is provided on one side of the brake mounting plate, the brake disc is installed on the output shaft, the brake disc is connected to the brake body, and the brake body is set on the brake mounting plate.

[0013] By adopting the above technical solution, the brake assembly is integrated on the rear end cover of the motor, making the entire brake motor system compact and simplifying the brake installation process.

[0014] Preferably, the handle hole two on the friction housing is elongated.

[0015] By adopting the above technical solution, the elongated handle hole 2 allows the handle to move within a certain range, enabling the equipment to adapt to two different working states: the pressure plate detaching from the throwing block and the throwing block being stuck.

[0016] Preferably, the brake body and the friction housing are both fixedly mounted on the brake mounting plate by double-ended screws.

[0017] By adopting the above technical solution, the installation process of the double-ended screw is relatively simple. Just pass the screw through the corresponding hole and then tighten the nut to complete the fixation, which helps to shorten the installation time and improve the installation efficiency.

[0018] Preferably, the pull plate has a mounting hole at one end and a buckle at the other end.

[0019] By adopting the above technical solution, the pull plate is installed on the friction housing through the mounting holes, and the buckle and handle cooperate. The simple mechanical structure realizes the cooperation between the pressure plate and the throwing block, further reducing manufacturing costs and improving economic practicality.

[0020] Preferably, the top edge of the bearing housing is provided with a retaining ring groove, and the bearing is positioned on the bearing housing by the elastic retaining ring.

[0021] By adopting the above technical solution, the bearing is positioned on the bearing housing using an elastic retaining ring, thus preventing axial displacement of the bearing during operation.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] 1. When the lifting platform of this utility model is in operation, the latch disengages from the handle, and the compression spring pushes the pressure plate away from the pressure plate groove. When the cage and load are in an overspeed falling state, the swing block is thrown against the inner wall of the friction shell by centrifugal force, and the friction generates torque, causing the cage and load to descend to the ground at a safe and uniform speed, avoiding injury and damage to personnel and equipment. When the lifting platform's power system is in a braking failure state, the brake motor can be manually released, allowing the lifting platform to drive the cage and load to descend at a safe and uniform speed until they land on the ground without damage. This avoids accidents caused by the brake motor of the descent motor failing due to abnormal heat and accelerated wear due to continuous intermittent manual release operation, and eliminates the need for a separate backup power supply. When the speed equalizer is not needed, simply fasten the latch to the handle.

[0024] 2. In this utility model, the pressure plate and the throwing block are connected by a spring. The pressure plate is positioned by a handle, which is secured by a buckle on the pull plate, simplifying the structure and reducing production costs.

[0025] 3. The elongated handle hole of this utility model allows the handle to move within a certain range, enabling the equipment to adapt to two different working states: the pressure plate disengaging from the throwing block and the throwing block being jammed. Attached Figure Description

[0026] Figure 1 This is an exploded view of the present invention;

[0027] Figure 2 This is an assembly diagram of the present utility model;

[0028] Figure 3 This utility model Figure 1 Enlarged view of a portion of the image;

[0029] Figure 4 This is a cross-sectional view of the present invention;

[0030] Figure 5 This is a diagram showing the operational status of this utility model;

[0031] Figure 6 This is a diagram showing the locked state of this utility model.

[0032] Drawing numbers: 1. Output shaft, 2. Sling block seat, 3. Pressure plate groove, 4. Motor rotor, 5. Pressure plate ring, 6. Bearing seat, 8. Flat key, 9. Motor rear end cover, 10. Brake fixing plate, 11. Brake disc, 12. Brake body, 13. Double-ended screw, 14. Speed ​​equalizer outer spline sleeve, 15. Pull plate, 16. Tension spring ring, 17. Inner spline sleeve, 18. Handle hole one, 19. Friction housing, 20. Sling block, 21. Friction plate, 22. Compression spring, 23. Pressure plate, 24. Compression spring groove, 25. Bearing, 26. Pressure plate outer shell, 27. Shaft elastic retaining ring, 28. Handle hole two, 29. Cover plate, 30. Hollow encoder, 31. Handle, 32. Retaining ring groove, 33. Protective cover, 211. Mounting hole, 212. Buckle. Detailed Implementation

[0033] like Figure 1 , 2 As shown, the fall protection braking motor includes a motor rotor 4, the output shaft 1 of which extends out of the rear end cover 9 of the motor and is connected to a speed equalizer via a flat key 8. Figure 3As shown, the speed equalizer includes an outer spline sleeve 14, an inner spline sleeve 17 on the outer spline sleeve 14, a plurality of sling block seats 2 evenly distributed on the inner spline sleeve 17, and sling blocks 20 on the sling block seats 2. A tension spring coil 16 surrounds the plurality of sling blocks 20, and the sling blocks 20 are pressed tightly onto the sling block seats 2 under the tension of the tension spring coil 16. A pressure plate groove 3 is formed on the pressure plate 20, and a pressure plate ring 5 is embedded in the pressure plate groove 3. The pressure plate ring 5 is fixed to one side of the pressure plate 23. A bearing seat 6 is set on the other side of the pressure plate 23, and a bearing 25 is set on the bearing seat 6. The bearing 25 is installed in the pressure plate housing 26. A handle hole 18 is formed on the pressure plate housing 26. A compression spring groove 24 is set on the inner wall of the inner spline sleeve 17, and a compression spring 22 is set in the compression spring groove 24. The compression spring 22 rests in the limiting groove of the pressure plate 23. A handle hole 28 is formed on the friction housing 19. The handle hole 18 and the handle hole 28 on the pressure plate housing 26 are located on the same axis. The handle 31 passes through the handle hole 28 and is fixed in the handle hole 18. The handle 31 is made of hexagonal bolt, and the threaded part of the handle 31 is screwed into the handle hole 18. The handle 31 cooperates with the pull plate 15. A brake body 12 is set on the output shaft 1. The brake body 12 is located between the rear end cover 9 of the motor and the outer spline sleeve 14. When the elevator is in operation, the latch 212 disengages from the handle 31, and the compression spring 22 pushes the pressure plate 23 away from the pressure plate groove 3. When the cage and load are in an overspeed falling state, the swing block 20 is thrown against the inner wall of the friction housing 19 by centrifugal force, generating torque through friction. The cage and load descend to the ground at a safe and uniform speed, avoiding injury and damage to personnel and equipment. When the elevator's power system is in a braking failure state, the brake motor can be manually released. The swing block 20 is thrown against the inner wall of the friction housing 19 by centrifugal force, generating friction torque, causing the elevator to lower the cage and load at a safe and uniform speed until they land on the ground without damage. This avoids the accident caused by the brake of the descent motor due to abnormal heat and accelerated wear caused by continuous intermittent manual release operation, and eliminates the need for a backup power supply. When the speed equalizer is not needed, simply latch the handle 31 with the latch 212. The pressure plate 23 and the throwing block 20 are connected by a spring 22. The pressure plate 23 is positioned by a handle 31, which is secured by a buckle 212 on a pull plate 15. This simplifies the structure and reduces production costs.

[0034] Friction plates 21 are provided on the surface of the sling block 20. There is an interval between the friction plates 21 and the friction housing 19. Under the action of centrifugal force, braking torque is generated by friction between the friction plates 21 and the friction housing 19, resulting in high braking efficiency.

[0035] like Figure 4 As shown, the handle hole 28 on the friction housing 19 is elongated. The protective cover 33 also has an elongated hole for moving the handle 21. The elongated handle hole 28 allows the handle 31 to move within a certain range, enabling the equipment to adapt to two different working states: the pressure plate disengaging from the throwing block and the throwing block being jammed.

[0036] The pull plate 15 has a mounting hole 211 at one end and a buckle 212 at the other end. The pull plate 15 is mounted on the friction housing 19 through the mounting hole 211. The buckle 212 and the handle 31 cooperate, and the cooperation between the pressure plate 23 and the throwing block 20 is achieved by adopting a simple mechanical structure, which further reduces manufacturing costs and improves economic practicality.

[0037] The screw passes through the mounting hole 211 and the hole in the protective cover 33, and is screwed into the hole in the friction housing 19. The pull plate 15 is rotatably mounted on the friction housing 19, making it easy for the pull plate 15 to be fastened to or detached from the handle 31. The handle 31 uses an internal hexagon head bolt.

[0038] The bearing housing 6 has a retaining ring groove 32 on its top edge, and the bearing 25 is positioned on the bearing housing 6 by an elastic retaining ring 27. An elastic retaining ring 24 is used to position the bearing 25 on the bearing housing 6 to prevent axial displacement of the bearing 25 during operation.

[0039] A brake mounting plate 10 is installed on the rear end cover 9 of the motor. A brake disc 11 is provided on one side of the brake mounting plate 10. The brake disc 11 is mounted on the output shaft 1 and is connected to the brake body 12. The brake body 12 is mounted on the brake mounting plate 10. Integrating the brake assembly on the rear end cover 9 of the motor makes the entire brake motor system compact and simplifies the brake installation process.

[0040] The brake body 12 and the friction housing 19 are both fixedly mounted on the brake mounting plate 10 by double-ended screws 13. The installation process of the double-ended screws is relatively simple. Just pass the double-ended screws 13 through the corresponding holes and then tighten the nuts to complete the fixation, which helps to shorten the installation time and improve the installation efficiency.

[0041] like Figure 5 As shown, during operation, the pull plate 15 is open, the speed equalizer is in the state where the buckle 212 is disengaged from the handle 31, and the compression spring 22 pushes the pressure plate 23 away from the pressure plate groove 3. When the cage and load fall at excessive speed, the throwing block 20 overcomes the preload of the tension spring ring 16 and is thrown outward under the action of centrifugal force. The friction plate 21 generates friction with the friction housing 19. The frictional resistance increases with the increase of the rotation speed of the friction housing 19, gradually forming a braking torque that balances the weight of the hoist cage, realizing the uniform descent of the construction hoist cage and avoiding injury and damage to personnel and equipment. When the hoist cage malfunctions and stops in mid-air and cannot move, the brake disc 11 is manually released to put the hoist cage into a uniform descent state.

[0042] like Figure 6 As shown, when the speed equalizer is not needed, the manual operation of the pull plate 15 engages the handle 31, the pressure plate 23 engages the swing block 20, the tension spring 16 returns to its original position and does not generate tension, and the speed equalizer does not work.

[0043] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A fall protection brake motor, comprising a motor rotor (4), an output shaft (1) of the motor rotor (4) passes out of a motor rear end cover (9) and is provided with a uniform speed device through a flat key (8), the uniform speed device comprises an outer spline sleeve (14), an inner spline sleeve (17) is arranged on the outer spline sleeve (14), a plurality of flyweights (20) are evenly distributed on the inner spline sleeve (17), a flyweight seat (2) is arranged on the flyweight (20); a pressure disc groove (3) is formed on the flyweight (20), a pressure disc ring (5) is embedded in the pressure disc groove (3), and the pressure disc ring (5) is fixed on one side of a pressure disc (23), characterized in that: The other side of the pressing disc (23) is provided with a bearing seat (6), the bearing seat (6) is provided with a bearing (25), the bearing (25) is installed in a pressing disc shell (26), the pressing disc shell (26) is provided with a handle hole one (18); The inner wall of the inner spline sleeve (17) is provided with a compression spring groove (24), the compression spring groove (24) is provided with a compression spring (22), the compression spring (22) is located in the limiting groove of the pressing disc (23); The friction shell (19) is provided with a handle hole two (28), the handle hole one (18) and the handle hole two (28) on the pressing disc shell (26) are located on the same axis; The handle hole one (18) is provided with a handle (31); The handle (31) and the pull plate (15) are matched; The output shaft (1) is provided with a brake body (12), the brake body (12) is located between the motor rear end cover (9) and the outer spline sleeve (14).

2. A fall arrest protection brake motor according to claim 1, characterised in that: The surface of the flyweight (20) is provided with a friction plate (21), and the friction plate (21) and the friction shell (19) have an intermittent.

3. A fall arrest protection brake motor according to claim 1, characterised in that: The pull plate (15) is rotatably installed on the friction shell (19).

4. A fall arrest protection brake motor according to claim 1, characterised in that: The motor rear end cover (9) is provided with a brake fixed disc (10), one side of the brake fixed disc (10) is provided with a brake disc (11), the brake disc (11) is installed on the output shaft (1), the brake disc (11) is connected with the brake body (12), and the brake body (12) is arranged on the brake fixed disc (10).

5. A fall arrest protection brake motor according to claim 3, characterised in that: The handle hole two (28) on the friction shell (19) is long strip-shaped.

6. A fall arrest protection brake motor according to claim 4, characterised in that: The brake body (12) and the friction shell (19) are fixedly installed on the brake fixed disc (10) through the double-headed screw rod (13).

7. A fall arrest protection brake motor according to claim 3, characterised in that: One end of the pull plate (15) is provided with a mounting hole (211), and the other end is provided with a buckle (212).

8. A fall arrest protection brake motor according to claim 1, characterized in that: The top edge of the bearing seat (6) is provided with a check ring groove (32), and the bearing (25) is positioned on the bearing seat (6) through the elastic check ring (27).

Images