Anti-falling protection brake motor

Abstract

The invention relates to the technical field of elevator speed limiting protection devices, and discloses an anti-falling protection brake motor which is characterized in that an outer spline sleeve (5) is mounted on a rotating shaft behind a motor rotor (3), an inner spline sleeve (9) is sleeved on the outer spline sleeve (5), flail block seats (4) are uniformly distributed on the inner spline sleeve (9), the flail block seats (4) are in sliding fit with flail blocks (10), the flail blocks (10) are tightly pressed on the inner spline sleeve (9) through tension springs (12) surrounding flail block arc grooves (13), and the inner spline sleeve (9) is sleeved with the inner spline sleeve (9). A friction plate (11) is fixed on the flail block (10); a friction shell (8) is fixedly arranged on the motor rear end cover (7), a gap is formed between the friction plate (11) and the inner wall of the friction shell (8), and self-adaptive safety protection is formed. Two linkage devices are arranged on the friction shell (8) in an axial symmetry mode, a pressure plate (15) is arranged on the flail block (10), and linkage type safety protection is formed. The device is low in manufacturing cost, and drives a load to fall safely in a dynamic balance mode.

Description

Technical Field

[0001] The invention relates to the technical field of elevator speed limiting protection devices, in particular to an anti-fall protection brake motor. Background Art

[0002] Rack and pinion lifts are the most widely used lifts. The introduction and popularization of intelligent lifts in recent years have made great progress in the technology and performance of lifts, and effectively promoted the updating and iteration of products. At present, the applications of intelligent lifts include intelligent passenger and cargo lifts, intelligent material lifts, and industrial intelligent lifts. The operating characteristics of intelligent lifts are that under unmanned conditions, with the help of modern sensing and monitoring technology, the load can be lifted vertically away from the ground very safely through the automatic control system, and precise high-altitude vertical positioning (or automatic leveling) can be achieved. However, the unmanned operation of intelligent lifts has weakened the on-site tracking and real-time fault judgment of professional driving personnel on the operation of the equipment, which objectively gave rise to two important issues: safe handling of sudden failures and technical protection of fall prevention safety.

[0003] 1. Problems with existing methods for dealing with sudden failures of elevators During the operation of the intelligent elevator, sudden failure of the equipment is often inevitable. The cage with the load is far away from the ground and cannot operate due to the failure. At this time, the elevator needs to land quickly to facilitate the emergency escape of the passengers and unloading and maintenance. Currently, there are only three ways to return to the ground: ① If it is an unmanned material lift or intelligent lift, professional maintenance personnel must climb from the ground through the standard section of the lift to the top of the lift cage, use the manual release handle of the motor brake, manually open the brake intermittently, and slowly lower the cage and load from a height to the ground in sections.

[0004] ② If the passenger and cargo lift is driven by a professional, the professional is required to climb over the skylight inside the elevator cage to the top of the cage, and use the manual release handle of the motor brake to manually open the brake intermittently, and then slowly and gradually lower the cage and load from a height to the ground.

[0005] ③The latest generation of unmanned intelligent elevators is equipped with a high-power emergency backup power supply. When the main power supply suddenly fails, the backup power supply is enabled to access the power control system to safely return the cage and load to the ground.

[0006] The above three methods of returning the load to the ground in the event of a fault are clumsy, slow, obviously backward and not very safe. At the same time, they will cause serious friction loss to the brake, which will shorten its service life and bring new safety hazards. Although the third method realizes the return function through the backup power supply and power system, the large-power backup power supply increases the weight and cost of the equipment. Secondly, this method has limitations and can only be applied when a power failure occurs and there is no other fault in the power control system. If the fault occurs in the failure of electronic control components, inverter failure, motor failure, etc., the return function cannot be realized.

[0007] (II) Insufficient issues of current anti-fall safety devices used in elevators At present, the only safety device used for anti-fall safety protection of rack and pinion elevators is called a progressive anti-fall safety device, but this anti-fall safety device has the following disadvantages: ① The anti-fall safety device is installed at the end of the power system, i.e., the rack position. The required braking force and braking torque are more than twice the sum of the total mass of the moving parts of the elevator and the maximum load. The strength of its structural parts is high. Therefore, this type of anti-fall safety device is bulky and has a high manufacturing cost.

[0008] ② The action of the anti-fall safety device is a locking safety protection when the load occurs in the process of falling. That is, the power system of the elevator loses the braking force and the load falls to a certain height and reaches the set speed. Impact braking, once started, will cause strong impact damage to the power system and even the entire elevator.

[0009] The related reference document CN114408695A discloses a manual uniform-speed descent speed limiting mechanism for a construction elevator, in which a manual trigger mechanism is arranged. The manual trigger mechanism comprises a hand brake, a pulling transmission rod, a rotating lever, a linkage round rod, a transmission plate, an eccentric dial wheel A and an eccentric dial wheel B. The eccentric dial wheel comprises an eccentric shaft. Both eccentric dial wheels are mounted on a speed limiter housing and can push a limiting ring relatively away from a centrifugal block. The two ends of the linkage round rod are respectively connected with a rotating lever and a pulling transmission rod. The rotating lever and the pulling transmission rod are both connected with transmission plates, which are respectively connected with the eccentric dial wheel A and the eccentric dial wheel B. The eccentric dial wheel adopts an eccentric shaft. When the elevator descends rapidly, the step surface of the eccentric shaft is easily broken due to the centrifugal inertia force. The manufacturing precision of the eccentric shaft is high and the manufacturing cost is relatively high. Summary of the invention

[0010] The technical problem to be solved by the present invention is to provide a fall protection brake motor with low manufacturing cost, which keeps a linkage device in good working condition and drives a load to fall safely in a dynamic balance manner.

[0011] In order to solve the above technical problems, the present invention provides an anti-fall protection brake motor, including a motor body consisting of a motor front end cover, a motor rotor, a motor stator and a motor rear end cover; an external spline sleeve is installed on the rotating shaft behind the motor rotor, an internal spline sleeve is mounted on the external spline sleeve, and swing block seats are evenly distributed on the internal spline sleeve, the swing block seats and the swing blocks are slidably matched, the swing blocks are tightly pressed on the inner spline sleeve by a tension spring surrounding the arc groove of the swing block, and a friction plate is fixed on the swing block; a friction shell is fixedly arranged on the rear end cover of the motor, and there is a gap between the friction plate and the inner wall of the friction shell.

[0012] By adopting the above technical solution, the motor shaft is equipped with a swing block equipped with a friction plate through the inner and outer spline sleeves. The swing block is slidably matched with the swing block seat. The safety protection function of adaptive braking is automatically triggered by the centrifugal principle, which responds quickly and increases the operating stability. The power system drives the load to fall safely in a dynamic balance manner, preventing the cage and load from falling and avoiding safety accidents. The brake motor is compact and has a low manufacturing cost, which is less than half of the progressive anti-fall safety device.

[0013] Preferably, there are a plurality of swing block seats evenly distributed in the circumferential direction, a swing block cavity is provided on the swing block, and the swing block cavity and the swing block seat are slidably matched.

[0014] By adopting the above technical solution, the swing block is swung out radially and parallelly, and at the same time drives the friction plate to contact the inner wall of the friction shell, so that the contact area is large and the friction torque is high.

[0015] Preferably, a pressure plate is arranged in the slot of the swing block; a pressure plate mounting block is arranged on the inner spline sleeve, and the pressure plate is mounted on the pressure plate mounting block through a pressure plate fixing piece and a fastener; a compression spring is sleeved on the pressure plate fixing piece.

[0016] By adopting the above technical solution, the pressure plate and the linkage device cooperate to achieve safety protection of the cage and load against falling.

[0017] Preferably, two sets of linkage devices are axially symmetrically arranged on the friction shell.

[0018] By adopting the above technical solution, the linkage device is symmetrically arranged to ensure that the pressure plate is pushed smoothly.

[0019] Preferably, the linkage device includes a steel sleeve, a connecting shaft, an oil-free bearing, an inner pull plate, an outer pull plate, a passive shaft, a bearing and a pull rod. The steel sleeve is installed in the linkage hole of the friction shell; an oil-free bearing is arranged in the steel sleeve, and a connecting shaft is arranged in the oil-free bearing, and the inner pull plate and the outer pull plate are respectively installed at both ends of the connecting shaft; the passive shaft is installed in the passive hole of the inner pull plate, and a bearing is arranged on the passive shaft; the pull rod is installed in the outer pull plate through the pull rod hole, and the pull rod is connected to the release handle.

[0020] By adopting the above technical solution, the linkage device with bearings set on the columnar passive shaft is combined with a pressure plate, which is combined with the motor body and brake through a pull rod to seamlessly combine the three functions of drive, brake and safety protection. The entire main structure is compact and the design volume is small. The manufacturing cost is less than half of the progressive anti-fall safety device. The manufacturing cost is low, which overcomes the shortcomings of high manufacturing cost of the progressive anti-fall safety device and impact damage to the elevator caused by the locked safety protection. Solve the safe disposal of personnel escape and lossless landing in case of sudden high-altitude failure. It is not only safe and reliable, but also has no adverse hidden dangers.

[0021] Preferably, a brake fixing disc is arranged on the friction shell, and a brake is mounted on the brake fixing disc; the brake disc of the brake is connected to the rotating shaft, and a release handle is arranged on the brake.

[0022] By adopting the above technical solution, when abnormal situations such as power failure and emergency shutdown occur, the rotation of the motor can be stopped quickly to protect the motor from damage.

[0023] Preferably, the outer ring of the friction housing is provided with a protective cover via a bracket.

[0024] By adopting the above technical solution, the swing block, brake and other components are surrounded and covered by the protective cover.

[0025] Compared with the prior art, the present invention has the following beneficial effects: 1. The motor shaft of the present invention is equipped with a swing block equipped with a friction plate through an inner and outer spline sleeve. The swing block is slidably matched with the swing block seat. The safety protection function of adaptive braking is automatically triggered by the centrifugal principle. The response is rapid, and the operation stability is increased. The power system drives the load to fall safely in a dynamic balance manner, preventing the cage and the load from falling and avoiding safety accidents. The brake motor is small in size, and the manufacturing cost is less than half of the progressive anti-fall safety device, and the manufacturing cost is low.

[0026] 2. In the present invention, when the brake fails suddenly and the cage and the load descend rapidly, the swing block overcomes the tension of the tension spring under the action of centrifugal force and is swung toward the inner wall of the friction shell, and the friction of the friction plate forms a braking torque. The protection mechanism is automatically triggered by the mechanical centrifugal force, and the braking torque is transmitted to the motor rotor through the inner and outer spline sleeves, and then transmitted to the transmission system through the motor rotor, forcing the cage and the load to decelerate. After the power system decelerates, the centrifugal force of the swing block decreases, the friction of the friction plate decreases, the braking torque decreases, and the protection mechanism is triggered again, and the cycle repeats. The transmission system brings the cage and the load down at a uniform speed in a dynamic balance manner without damaging the landing ground.

[0027] 3. The bearing of the present invention is rotatably arranged on a cylindrical passive shaft, which is easy to assemble and avoids breaking of the step surface of the eccentric thumbwheel due to rotational inertia force, thereby maintaining a good working state of the linkage device, reducing manufacturing costs, and increasing the service life of the brake motor.

[0028] 4. The present invention is equipped with a linkage device with a bearing set on a cylindrical passive shaft combined with a pressure plate, which is combined with the motor body and the brake through a pull rod, and the three functions of driving, braking and safety protection are seamlessly combined. The entire main structure is compact, the design volume is small, and the manufacturing cost is less than half of the progressive anti-fall safety device. The manufacturing cost is low, which overcomes the shortcomings of the high manufacturing cost of the progressive anti-fall safety device and the impact damage to the elevator caused by the locked safety protection. Solve the safety disposal of personnel escape and lossless landing in case of sudden high-altitude failure. It is not only safe and reliable, but also has no adverse hidden dangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is an exploded view of the adaptive structure of the present invention.

[0030] Figure 2 Adaptive appearance diagram of the present invention.

[0031] Figure 3 Assembly diagram of the adaptive removal protective cover of the present invention.

[0032] Figure 4 The present invention is an adaptive structural anatomical diagram.

[0033] Figure 5 This is the exploded view of the linkage structure of the present invention. Structural anatomy and appearance diagram.

[0034] Figure 6 It is the appearance diagram of the linkage type of the present invention.

[0035] Figure 7 The present invention is linked Figure 5 A partial enlarged view.

[0036] Figure 8 It is a schematic diagram of the linkage type linkage device of the present invention.

[0037] Fig. 9 This is an assembly diagram of the linkage type of the present invention with the protective cover removed.

[0038] Fig.10 This is an anatomical diagram of the linkage structure of the present invention.

[0039] Figure number: 1. Motor front end cover, 2. Throw block cavity, 3. Motor rotor, 4. Throw block seat, 5. External spline sleeve, 6. Motor stator, 7. Motor rear end cover, 8. Friction housing, 9. Internal spline sleeve, 10. Throw block, 11. Friction plate, 12. Tension spring, 13. Throw block arc groove, 14. Slot, 15. Pressure plate, 16. Compression spring, 17. Pressure plate fixing, 18. Flat washer, 19. Fastener, 20 Steel sleeve, 21. Connecting shaft, 22. Oil-free bearing, 23. Inner pull plate, 24 Outer pull plate, 25. Fixing screw, 26. Passive shaft, 27. Washer, 28. Bearing, 29. Positioning screw, 30. Pull rod, 31. Brake fixing plate, 32. Brake, 33. Release handle, 34. Pressure plate mounting block, 35. Encoder, 36. Linkage hole, 37. Bracket, 38. Protective cover. DETAILED DESCRIPTION

[0040] The following is a description of two usage scenarios of the brake motor of the present application and their different structures and functional principles in conjunction with the accompanying drawings. Example 1: Adaptive uniform speed safety protection for low-speed elevators (I) Applicable objects and scope 1. Intelligent or ordinary material lift; 2. Intelligent or ordinary low-speed passenger and cargo lift; 3. Low-speed lifting machinery with independent brakes; 4. Other low-speed lifting machinery driven by motors and brakes.

[0041] (II) Structural characteristics Overall structure and appearance: See the structural anatomy and appearance diagram of the anti-fall protection brake motor (adaptive type).

[0042] like Figure 1 , 2 The functional parts shown. Their assembly relationship is as follows: The motor body is composed of a motor front end cover 1, a motor rotor 3, a motor stator 6 and a motor rear end cover 7.

[0043] The anti-fall protection brake motor (adaptive type) has an outer spline sleeve 5 installed on the rotating shaft at the rear of the motor rotor 3, and the inner spline sleeve 9 is mounted on the outer spline sleeve 5. Three swing blocks 10 are evenly distributed on the swing block seat 4 of the inner spline sleeve 9, and the swing block 10 is pressed against the inner spline sleeve 9 by two positive and negative tension springs 12 surrounding the arc groove 13 of the swing block. A friction plate 11 is fixed on the swing block 10. The friction shell 8 is fixed on the rear cover 7 of the motor, and a single-sided gap is left between the friction plate 11 on the swing block 10 and the inner hole of the friction shell 8. The above-mentioned structural parts constitute the main structure of the motor anti-fall uniform speed protection.

[0044] There are several swing block seats 4 evenly distributed in the circumferential direction, and this embodiment adopts three. A swing block cavity 2 is provided on the swing block 10, and the swing block cavity 2 is slidably matched with the swing block seat 4. The swing block 10 is thrown out radially and parallelly, and at the same time drives the friction plate 11 to contact the inner wall of the friction housing 8, with a large contact area and high friction torque.

[0045] like Figure 3 As shown, the rear part of the main structure of the motor anti-fall uniform speed protection is equipped with a brake 32 through a brake fixing disc 31, wherein the brake fixing disc 31 is fastened and mounted on the friction housing 8, the brake 32 is mounted on the brake fixing disc 31, the brake disc of the brake 32 is connected to the rotating shaft, and a brake release handle 33 is mounted on the brake 32. The release handle 33 is in the shape of a fork with a column and a transition seat.

[0046] like Figure 4 As shown, an encoder 35 and a fan are also installed on the rotating shaft at the rear of the motor rotor 3. The motor protective cover 38 is installed on the outer ring of the friction shell 8 and surrounds the main structure of the motor's anti-fall and uniform speed protection, brake, fan, etc. from the outside.

[0047] The motor shaft is equipped with a swing block 10 equipped with a friction plate 11 through an inner and outer spline sleeve. The swing block 10 is in a sliding match with the swing block seat 4. The safety protection function of adaptive braking is automatically triggered by the centrifugal principle, which responds quickly and increases the operating stability. The power system drives the load to fall safely in a dynamic balance manner, preventing the cage and the load from falling and avoiding safety accidents. This main structure is small in size and low in manufacturing cost, which is less than half of the progressive anti-fall safety device.

[0048] (III) Functional principle When the elevator drives the cage and the load to operate normally, the motor rotor 3 drives the outer spline sleeve 5, the inner spline sleeve 9, the swing block 10 equipped with the friction plate 11 and the tension spring 12 to rotate at the same speed. The rotation speed at this time is lower than the action speed corresponding to the set uniform speed. At this time, the adaptive uniform speed protection has not yet started and is in the off state. When the cage and the load run to the required height, the encoder 35 sends the position signal to the elevator control system, the control system issues a command, the motor stops, the brake 32 brakes, the elevator realizes automatic leveling, and the cage and the load then stop precisely at this height.

[0049] A. Power system brake failure (failure to brake or insufficient braking torque) Here’s how it works: For some reason, when the brake (or independent brake) of the elevator or other lifting machinery suddenly fails, it cannot brake or the braking torque is insufficient. At this time, the cage and the load lose the braking force and fall at a faster speed. At the same time, the cage and the load drive the motor rotor 3 together with the outer spline sleeve 5, the inner spline sleeve 9, the swing block 10 equipped with the friction plate 11 and the tension spring 12 to rotate in the opposite direction at a speed higher than the normal operation speed. When the rotation speed reaches the set adaptive action speed, the three swing blocks 10 equipped with the friction plate 11 overcome the tension of the tension spring 12 under the action of centrifugal force and are thrown out from the swing block seat 4 of the inner spline sleeve 9. The friction plate 11 is close to the inner wall of the friction housing 8 and forms a braking torque. The braking torque is transmitted to the outer spline sleeve 5 and the motor rotor 3 through the inner spline sleeve 9. The braking torque of the motor rotor 3 is transmitted to the elevator transmission system to force the cage and the load to decelerate. After the motor drives the transmission system to decelerate, the centrifugal force of the swing block 10 decreases, and the friction between the friction plate 11 and the inner wall of the friction housing 8 decreases accordingly, the braking torque decreases, and the motor rotor 3 accelerates again under the action of the cage and the load force. After acceleration, the centrifugal force of the swing block 10 increases again, and the friction between the friction plate 11 and the inner wall of the friction housing 8 increases accordingly. In this way, the cycle repeats over and over again, and finally the power system of the elevator (or other lifting machinery) drives the load to a set safety speed fixed value, forming a dynamic balance safety falling state. This set fixed speed value is the adaptive rated uniform speed.

[0050] When the power system of the elevator (or other lifting machinery) drives the cage and the load to fall to the ground or the initial position at the rated uniform speed, the system speed drops to zero, the centrifugal force disappears, and the swing block 10 falls back to the original position of the inner spline sleeve 9, that is, it automatically resets. The adaptive uniform speed safety protection is completed.

[0051] B. The power system cannot work (no power output or insufficient power output and the system is in braking state) When an elevator or other lifting machinery has a sudden failure (except for mechanical jams of the motor and power system), such as sudden power outage, inverter failure, electronic control component failure, motor failure, etc., resulting in no power output or insufficient power output and the power system's brakes are in a braking state, facing the situation of being unable to operate and requiring emergency landing, the brake (or independent brake) is released manually or through a spare small-capacity power supply device, manually or remotely controlled, and its "adaptive uniform speed braking function" is automatically triggered, driving the cage and load to descend at a safe speed without damaging the landing ground.

[0052] Here’s how it works: For some reason, when the brake of the elevator motor (or the independent brake of other lifting machinery) cannot release the brake, the power system cannot drive the load to operate normally. This failure is manifested in sudden power outages, failure of electronic control components, failure of inverters, failure of motors, etc., resulting in no power output or insufficient power output and the power system is in a braking state, facing the impossibility of operation and requiring emergency landing. At this time, it is necessary to urgently return the power system, especially the load, to the ground or the initial position.

[0053] According to different fault conditions, first, the release handle 33 on the brake 32 forces the brake 32 to be released (i.e., release the brake) through the manual device on the elevator or the electric control device of the elevator (the backup power supply connected to the elevator can be used in case of power failure). At this time, the cage and the load lose the braking force and fall at a faster speed. Subsequently, the adaptive uniform speed safety protection is implemented in the same principle as A.

[0054] Example 2: Linked uniform speed safety protection for medium and high speed elevators (I) Applicable objects and scope 1. Intelligent manned lift with higher speed; 2. Ordinary manned lifts with higher speeds; 3. Ordinary non-passenger lifts with higher speeds; 4. Hoisting machinery with independent brakes at higher speeds; 5. Other lifting machinery with a relatively high speed driven by motors and brakes.

[0055] (II) Structural characteristics Overall structure: See the structural anatomy and appearance diagram of the anti-fall protection brake motor (linkage type).

[0056] like Figure 5 , 6 The functional parts shown. Their assembly relationship is as follows: The motor body is composed of a motor front end cover 1, a motor rotor 3, a motor stator 6, a motor rear end cover 7 and other components.

[0057] The anti-fall protection brake motor (linkage type) has an outer spline sleeve 5 installed on the rotating shaft at the rear of the motor rotor 3, and the inner spline sleeve 9 is mounted on the outer spline sleeve 5. Three swing blocks 10 are evenly distributed on the swing block seat 4 of the inner spline sleeve 9, and the swing block 10 is pressed against the inner spline sleeve 9 by two positive and negative tension springs 12 surrounding the arc groove 13 of the swing block. The friction plate 11 is fixed on the swing block 10. The pressure plate 15 is floatingly fixed to the outer side of the inner spline sleeve 9 by the compression spring 16, the pressure plate fixing part 17, the flat pad 18, and the fastener 19. The friction shell 8 is fixed on the rear end cover 7 of the motor, and the friction plate 11 on the swing block 10 and the inner hole of the friction shell 8 have a single-sided gap. The linkage device consisting of a steel sleeve 20, a connecting shaft 21, an oil-free bearing 22, an inner pull plate 23, an outer pull plate 24, a fixing screw 25, a passive shaft 26, a washer 27, a bearing 28 and a pull rod 30 is fixed to the friction housing 8 by two positioning screws 29. The above structural parts constitute the main structure of the motor anti-fall linkage type uniform speed protection.

[0058] like Figure 7 As shown, there are several swing block seats 4 evenly distributed in the circumferential direction, and this embodiment adopts three. A swing block cavity 2 is provided on the swing block 10, and the swing block cavity 2 and the swing block seat 4 are slidably matched. The swing block 10 is thrown out radially and parallelly, and at the same time drives the friction plate 11 to contact the inner wall of the friction housing 8, with a large contact area and a high friction torque.

[0059] A pressure plate 15 is arranged in the slot 14 of the swing block 10; a pressure plate mounting block 34 is arranged on the inner spline sleeve 9, and the pressure plate 15 is mounted on the pressure plate mounting block 34 through a pressure plate fixing member 17 and a fastener 19. In this embodiment, the pressure plate fixing member 17 adopts a fixing screw, and the fastener 19 adopts a locking nut. A compression spring 16 is sleeved on the pressure plate fixing member 17. The pressure plate 15 cooperates with the linkage device to realize the safety protection of the cage and the load from falling.

[0060] like Figure 8As shown, there are two groups of linkage devices. The two groups of linkage devices are axially symmetrically arranged to ensure that the pressure plate 15 is pushed smoothly. The linkage device is installed in the linkage hole 36 of the friction shell 8 through its steel sleeve 20. An oil-free bearing 22 is arranged in the steel sleeve 20, and a connecting shaft 21 is arranged in the oil-free bearing 22. An inner pull plate 23 and an outer pull plate 24 are respectively installed at both ends of the connecting shaft 21, and are fastened by fixing screws 25. A passive shaft 26 is installed in the passive hole of the inner pull plate 23, and a bearing 28 is arranged on the passive shaft 26. A washer 27 and a retaining ring are arranged at the tail of the passive shaft 26. A pull rod hole is opened on the outer pull plate 24, and a pull rod 30 is installed in the pull rod hole through a bolt; the pull rod 30 is connected to the transition seat of the release handle 33. The linkage device is installed on the friction shell 8. Pulling the release handle 33 pulls the outer pull plate 24, and transmits force to the inner pull plate 23 through the connecting shaft 21, and then the bearing 28 pushes the pressure plate 15, so that the three swing blocks 10 equipped with the friction plate 11 overcome the tension of the tension spring 12 under the action of centrifugal force and are thrown out. The friction plate 11 is close to the inner wall of the friction shell 8 to form a braking torque, and a dynamic balance is achieved, and the power system performs a safe and uniform falling action. When the power system is lowered into place with the cage and the load, the speed of the power system drops to zero, the centrifugal force disappears, the swing block 10 falls back to the initial position of the inner spline sleeve 9, the swing block 10 automatically resets, the release handle 33 returns to its position, and the pressure plate 15 automatically resets. The cylindrical passive shaft 26 of the present application does not need to consider the axial eccentricity of the passive shaft 26 when processing, which reduces the manufacturing cost. The bearing 28 is rotatably installed on the cylindrical passive shaft 26 to avoid breaking the step surface of the eccentric dial wheel due to the rotational inertia force, keep the linkage device in good working condition, and improve the service life of the brake motor. The main structure is compact, the design volume is small, and the manufacturing cost is less than half of the progressive anti-fall safety device. The manufacturing cost is low. The linkage device is combined with the pressure plate 15, and is combined with the motor body and the brake through the pull rod 30, so that the three functions of driving, braking and safety protection are seamlessly combined, overcoming the shortcomings of the high manufacturing cost of the progressive anti-fall safety device and the impact damage to the elevator caused by the locked safety protection. It solves the safety disposal of personnel escape and lossless landing in case of sudden high-altitude failure. It is not only safe and reliable, but also has no adverse hidden dangers.

[0061] like Fig. 9As shown, the rear part of the main structure of the motor anti-fall linkage type uniform speed protection is equipped with a brake 32 through a brake fixing disc 31, wherein the brake fixing disc 31 is fastened and installed on the friction shell 8, the brake 32 is installed on the brake fixing disc 31, the brake disc of the brake 32 is connected to the rotating shaft, and the brake release handle 33 is installed on the brake 32. The release handle 33 is in the shape of a fork with a column and a transition seat. Two groups of pull rods 30 are connected between the transition seat of the release handle 33 of the brake and the linkage device. By adopting the mode of connecting the transition seat of the release handle 33 and the pull rod 30 of the linkage device, when a sudden fault occurs, the handle 33 is released manually or remotely, the pressure plate 15 is pushed, and the throwing block 10 is thrown out, and the anti-fall protection of the device is started, which has a simple structure, convenient operation and strong practicality.

[0062] like Fig.10 As shown, an encoder 35 and a fan are also mounted on the rotating shaft at the rear of the motor rotor 3.

[0063] The protective cover 38 of the motor is installed on the outer ring of the friction housing 8 through the bracket 37 and surrounds the main structure of the motor anti-fall linkage type uniform speed protection, the brake 32, the fan, etc. from the outside.

[0064] (III) Functional principle When the elevator drives the cage and the load to operate normally at the normal operating speed, the motor rotor 3 drives the outer spline sleeve 5, the inner spline sleeve 9, the swing block 10 equipped with the friction plate 11 and the tension spring 12 to rotate at the same speed, and the pressure plate 15, the compression spring 16 together with the pressure plate fixing 17, the flat pad 18 and the fastener 19 are driven to rotate at the same speed. At this time, the annular snap ring on the left side of the pressure plate 15 is stuck in the groove 14 of the three swing blocks 10. Even if the centrifugal force of the swing block 10 exceeds its own inertia, it still cannot be thrown out to implement friction braking. At this time, the linkage type uniform speed protection has not been started and is in the closed state. When the cage and the load run to the required height, the encoder 35 sends the position signal to the elevator control system, the control system issues a command, the motor stops, the brake 32 brakes, the elevator achieves automatic leveling, and the cage and the load then stop precisely at this height.

[0065] When a sudden failure occurs and the power system has no power output or the power output is insufficient and the system is in a braking state, the "linked uniform speed braking safety protection function" is triggered through manual or electric operation, driving the cage and load to descend at a uniform speed at the set safety speed without damaging the landing ground.

[0066] Here’s how it works: When a sudden failure occurs (except for mechanical jamming of the motor and power system), such as sudden power failure, inverter failure, electronic control component failure, motor failure, etc., resulting in no power output or insufficient power output and the brake of the power system is in a braking state, facing the impossibility of operation and requiring emergency landing, the brake release handle 33 is manually operated or manually or remotely operated through a spare small-capacity power supply device to release the brake 32 (or independent brake). At this time, the pull rod 30 is linked to the action of the brake release handle 33 to overcome the The spring force of the two compression springs 16 compresses it and pushes the pressure plate 15 to the right, so that the annular snap ring on the left side of the pressure plate 15 that originally pressed the swing block 10 is separated from the card groove 14 of the three swing blocks 10. The three swing blocks 10 equipped with friction plates 11 overcome the tension of the tension spring 12 under the action of centrifugal force and are thrown out from the swing block seat 4 of the inner spline sleeve 9. The friction plate 11 is close to the inner wall of the friction housing 8 and forms a braking torque. The braking torque is transmitted to the outer spline sleeve 5 and the motor rotor 3 through the inner spline sleeve 9. The braking torque of the motor rotor 3 is transmitted to the elevator transmission system to force the cage and the load to decelerate. After the motor drives the transmission system to decelerate, the centrifugal force of the swing block 10 decreases, and the friction between the friction plate 11 and the inner wall of the friction housing 8 decreases accordingly, and the braking torque decreases. The motor rotor 3 accelerates again under the action of the cage and the load force. After acceleration, the centrifugal force of the swing block 10 increases again, and the friction between the friction plate 11 and the inner wall of the friction housing 8 increases accordingly. In this way, the cycle repeats itself, and eventually the power system of the elevator (or other lifting machinery) drives the load to a set safety speed fixed value, forming a dynamic balance and safe falling state. This set safety speed fixed value is the linkage type rated uniform speed.

[0067] When the power system of the elevator (or other lifting machinery) drives the cage and the load to the ground or the initial position, the system speed drops to zero, the centrifugal force disappears, and the swing block 10 falls back to the original position of the inner spline sleeve 9, that is, it automatically resets. Manual operation or through a spare small-capacity power supply device, manually or remotely operate the release handle 33 of the brake, and the pressure plate 15 automatically resets under the action of the spring elastic force. The linkage type uniform speed safety protection is completed.

[0068] When the elevator takes the cage and the load away from the ground, the motor brake 32 (or the independent brake of other lifting machinery) suddenly fails, and the cage and the load fall rapidly, the "safety protection function of adaptive uniform braking" is automatically triggered to drive the cage and the load to descend at a set safe speed without damaging the landing ground. The cage and the load can be prevented from falling in time.

[0069] When the elevator with the cage and load is away from the ground due to a variety of sudden failures (including sudden power outages, inverter failure, electronic control component failure, motor failure, etc.), the "linked uniform speed braking safety protection function" is activated to return the cage and load to the ground in a timely and safe manner, ensuring the escape of personnel and the safe landing of equipment and loads.

[0070] The core main structure of the present application is very cleverly combined with the motor body and the brake trinity, seamlessly combining the three functions of driving, braking and safety protection, with novel design and compact structure.

[0071] The core main structure of this application has mature application technology, compact design, and low manufacturing cost, which is less than half of the progressive anti-fall safety device. It can realize the safe anti-fall protection of intelligent elevators at a relatively low cost, and overcome the two shortcomings of the progressive anti-fall safety device. Moreover, it can solve the safety disposal problems of personnel escape and lossless landing in case of sudden high-altitude failures. It is not only safe and reliable, but also has no adverse hidden dangers. When conditions are ripe, it can even replace the current dedicated progressive anti-fall safety device for elevators that uses locking protection.

[0072] This application is also applicable to ordinary rack and pinion lifts, and also to other types of lifting machinery other than rack and pinion lifts. Therefore, this is a new type of motor technology product with high innovation, strong practicality, and suitable for comprehensive promotion and application.

[0073] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fall protection brake motor, comprising a motor body consisting of a motor front end cover (1), a motor rotor (3), a motor stator (6), and a motor rear end cover (7); characterized in that: An outer spline sleeve (5) is installed on the rotating shaft behind the motor rotor (3), an inner spline sleeve (9) is mounted on the outer spline sleeve (5), and swing block seats (4) are evenly distributed on the inner spline sleeve (9). The swing block seats (4) and the swing blocks (10) are slidably matched, and the swing blocks (10) are tightly pressed on the inner spline sleeve (9) by a tension spring (12) surrounding the arc groove (13) of the swing block. A friction plate (11) is fixed on the swing block (10); a friction shell (8) is fixedly arranged on the rear end cover (7) of the motor, and a gap is formed between the friction plate (11) and the inner wall of the friction shell (8).

2. The anti-fall protection brake motor according to claim 1, characterized in that: The swing block seats (4) are a plurality of seats evenly distributed in the circumferential direction, a swing block cavity (2) is provided on the swing block (10), and the swing block cavity (2) and the swing block seat (4) are slidably matched.

3. The anti-fall protection brake motor according to claim 1, characterized in that: A pressure plate (15) is arranged in the slot (14) of the swing block (10); a pressure plate mounting block (34) is arranged on the inner spline sleeve (9); the pressure plate (15) is mounted on the pressure plate mounting block (34) via a pressure plate fixing member (17) and a fastener (19); and a compression spring (16) is sleeved on the pressure plate fixing member (17).

4. The anti-fall protection brake motor according to claim 3, characterized in that: Two sets of linkage devices are axially symmetrically arranged on the friction housing (8).

5. The anti-fall protection brake motor according to claim 4, characterized in that: The linkage device comprises a steel sleeve (20), a connecting shaft (21), an oil-free bearing (22), an inner pull plate (23), an outer pull plate (24), a passive shaft (26), a bearing (28) and a pull rod (30); the steel sleeve (20) is installed in a linkage hole (36) of a friction housing (8); an oil-free bearing (22) is arranged in the steel sleeve (20), a connecting shaft (21) is arranged in the oil-free bearing (22), and the inner pull plate (23) and the outer pull plate (24) are respectively installed at two ends of the connecting shaft (21); a passive shaft (26) is installed in the passive hole of the inner pull plate (23), and a bearing (28) is arranged on the passive shaft (26); the pull rod (30) is installed in the outer pull plate (24) through the pull rod hole, and the pull rod (30) is connected to a release handle (33).

6. The anti-fall protection brake motor according to claim 2 or 5, characterized in that: A brake fixing disc (31) is arranged on the friction housing (8), and a brake (32) is mounted on the brake fixing disc (31); the brake disc of the brake (32) is connected to a rotating shaft, and a release handle (33) is arranged on the brake (32).

7. The anti-fall protection brake motor according to claim 6, characterized in that: The outer ring of the friction housing (8) is mounted with a protective cover (38) via a bracket (37).

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