High-sensitivity elevator door machine braking device

Abstract

The application discloses a high-sensitivity elevator door machine brake device, which comprises an elevator car and a driving assembly at the bottom end of the elevator car, the driving assembly has two groups which are completely same and are respectively located at the bottom end of the two sides of the elevator car; the device comprises a calibration assembly, the calibration assembly has two groups which are completely same and are respectively located at the two ends of the inner wall of the elevator car; the device comprises a touch plate assembly, the touch plate assembly has four groups which are completely same and are respectively located at the upper and lower ends inside the elevator car. The driving assembly and the calibration assembly are arranged, so that the position of the elevator light curtain is calibrated regularly during the operation of the elevator, so that the sensitivity of the elevator door machine brake device is reduced due to the deviation of the elevator light curtain caused by vibration. The touch plate assembly is arranged, so that the sensitivity of the elevator door machine brake device changes with the position of the door, so that the sensitivity requirement at different positions during the door closing process is met, and the self-adaptation of the sensitivity of the device is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of elevator door machine braking, in particular to a high-sensitivity elevator door machine braking device. BACKGROUND

[0002] The elevator door machine braking device is one of the important protection devices of the elevator, and mainly functions to ensure the safe opening and closing of the elevator door during the operation of the elevator. If the door is not closed when the elevator is running, the braking device will automatically start to stop the operation of the elevator and keep it at the current floor. In order to achieve the above function, it is necessary to first ensure that the elevator door will not be closed when there is foreign matter blocking in the middle, and then transmit a signal to the braking system of the elevator through the sensor to brake the elevator, so as to ensure that the elevator stops running.

[0003] In the existing elevator, the elevator light curtain and the safety touch plate are used to realize the anti-pinch function of the elevator door. The light curtain is an infrared sensing device installed on the elevator car door. As long as there is an obstruction in the range of infrared sensing, the door will be reopened. However, due to its structural characteristics, the elevator light curtain will have dead angle areas at the upper and lower ends during installation, i.e. when there is foreign matter blocking in this area, the elevator light curtain cannot monitor it, at which time the safety touch plate is needed. The safety touch plate is a soft door installed at the upper and lower ends of the elevator light curtain on the elevator car door. When the elevator car contacts an object during the closing process, a switch connected to the near door will give a door opening signal to the control cabinet, so as to reopen the elevator car door. The all-around anti-pinch function of the elevator door is realized by the cooperation of the elevator light curtain and the safety touch plate.

[0004] However, during the operation of the elevator, vibration will inevitably occur due to friction, which will cause the bolts used to fix the elevator light curtain to loosen, further causing the position of the elevator light curtain to shift and the correspondence between the receiver and the transmitter to be destroyed, thereby reducing the sensitivity of the elevator door machine braking device. After long-term use, the spring elasticity of the safety touch plate will decrease, which will also affect the sensitivity of the device. In order to maintain the high sensitivity of the elevator door machine braking device, it needs to be regularly maintained, but the maintenance requires the disassembly of the door system of the elevator, which is a large project and time-consuming and laborious. SUMMARY

[0005] The purpose of the present application is to provide a high-sensitivity elevator door machine braking device with the advantages of automatic calibration and adaptive sensitivity, which solves the problems raised in the background art.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a high-sensitivity elevator door mechanism braking device, comprising an elevator car and a drive assembly at the bottom end thereof, the drive assembly has two groups which are completely the same and are respectively located at the bottom end of two sides of the elevator car, and the drive assembly is fixedly connected with the elevator car; comprising a calibration assembly, the calibration assembly has two groups which are completely the same and are respectively located at two ends of the inner wall of the elevator car, and the calibration assembly is fixedly connected with the elevator car, and the calibration assembly is in transmission connection with the drive assembly; comprising a touch plate assembly, the touch plate assembly has four groups which are completely the same and are respectively located at upper and lower ends inside the elevator car, and the touch plate assembly is fixedly connected with the elevator car; comprising a control module, the control module is located inside the touch plate assembly and is fixedly connected with the touch plate assembly.

[0007] Preferably, the elevator car comprises a car door, the car door is located on one side of the elevator car and is in movable connection with the elevator car, a landing door is in transmission connection with the side away from the elevator car of the car door, and the car door and the landing door are in transmission connection through a mortise and tenon structure.

[0008] Preferably, the drive assembly comprises an air tank, the air tank is fixedly connected with the outer wall of the bottom end of the car door, the inside of the air tank is penetrated and movably connected with a pressure roller, a pressure spring is arranged between the inner wall of the air tank and the axial top end of the pressure roller, the outer wall of the axial end close to the air tank of the pressure roller is movably connected with a limiting piece one, the outer wall of the axial end away from the air tank of the pressure roller is movably connected with a limiting piece two, the limiting piece one and the limiting piece two are fixedly connected with the outer wall of the bottom end of the car door, the outer wall of the axial middle part of the pressure roller is fixedly connected with a convex shaft, the outer wall of the axial end close to the limiting piece two of the pressure roller is movably connected with a bevel gear one, the bottom end of the pressure roller is fixedly connected with an abutting piece, and the bottom end of the air tank is penetrated and fixedly connected with a conduit.

[0009] Preferably, the calibration assembly comprises a drive shaft, the drive shaft is fixedly connected with the inner wall of the car door, the outer wall of the axial end of the drive shaft is fixedly connected with two non-complete gears, the two non-complete gears are centrally symmetrically distributed, the outer wall of the axial end close to the non-complete gear one of the drive shaft is in transmission connection with a transmission belt, the other end of the transmission belt is in transmission connection with the drive shaft of the other drive assembly, the outer wall of the axial end close to the car door of the drive shaft is fixedly connected with a bevel gear two, the bevel gear two is in meshing and transmission connection with the bevel gear one, the top end of the non-complete gear is intermittently meshed and in transmission connection with a transmission gear, the transmission gears are in meshing and transmission connection through staggered meshing, the end away from the bevel gear two of the transmission gear is meshed and in transmission connection with a rack, the end away from the transmission gear of the rack is fixedly connected with a calibration plate, the calibration plates are arranged with light curtain strips, and the light curtain strips are fixedly connected with the inner wall of the car door.

[0010] Preferably, the touch plate assembly comprises a pressure plate, the pressure plate is located inside the car door and is in transmission connection with the car door through a mortise and tenon structure, the pressure plate is in transmission connection with the landing door through a mortise and tenon structure, the bottom end of the pressure plate is fixedly connected with a connecting rod, one end of the connecting rod axially away from the pressure plate penetrates and movably connects with a sleeve, a working hole is formed in the outer wall of the sleeve, the working holes of the sleeve are in communication with each other through a connecting pipe, the working holes of the sleeve are fixedly connected with a conduit, the one end of the connecting rod axially away from the pressure plate is fixedly connected with two positioning pieces, the two positioning pieces are mirror-symmetrically distributed with the extension line of the center of the connecting rod as the axis, the one end of the positioning piece away from the connecting rod penetrates and movably connects with the working hole of the sleeve, and the one end of the sleeve axially away from the connecting rod is fixedly connected with a sealing film.

[0011] Preferably, the control module comprises a signal generator, a receiver and a controller; the signal generator is located inside the sleeve close to one end of the sealing film and is fixedly connected with the sleeve, the signal generator is arranged in a pressure switch mode; the receiver is located on the inner wall of the car door and is fixedly connected with the car door, and the receiver is electrically connected with the signal generator; the controller is located on the inner wall of the car door and is fixedly connected with the car door, and the controller is electrically connected with the receiver.

[0012] Preferably, the specifications of the abutting piece are matched with the hydraulic buffer device at the bottom end of the elevator shaft, the pressure spring in the air tank is fixedly connected with the inner wall of the air tank, and the pressure spring in the air tank is in contact with the top end of the pressure roller.

[0013] Preferably, the sleeve is made of a flexible pressure-resistant material, and the sleeve has a high-strength bending reset ability.

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] 1、The driving assembly and the calibration assembly are arranged, so that the position of the elevator light curtain is calibrated regularly during the operation of the elevator, thereby avoiding the sensitivity reduction of the elevator door machine brake device caused by the vibration-induced deviation of the elevator light curtain, and reducing the maintenance frequency of the elevator and saving a large amount of labor.

[0016] 2、The touch plate assembly is arranged, so that the sensitivity of the elevator door machine brake device changes with the position of the door, thereby meeting the sensitivity requirement at different positions during the door closing process, realizing the self-adaptation of the sensitivity of the device, and improving the service life of the device. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the main structure of the application;

[0018] Figure 2 is a sectional view of the main structure of the present application;

[0019] Figure 3 is a schematic view of the positional relationship between the car and the drive assembly of the present application;

[0020] Figure 4 is a sectional view of the drive assembly of the present application;

[0021] Figure 5 is a schematic view of the positional relationship between the drive assembly and the calibration assembly of the present application;

[0022] Figure 6 is a schematic view of the positional relationship of the calibration assembly of the present application;

[0023] Figure 7 is a schematic view of the positional relationship between the drive assembly and the touch plate assembly of the present application;

[0024] Figure 8 is a sectional view of the touch plate assembly of the present application;

[0025] Figure 9 is a flow chart of the overall operation of the present application.

[0026] In the figure: 1, elevator car; 11, car door; 12, landing door; 2, air tank; 21, pressure roller; 22, limiting member one; 23, limiting member two; 24, protruding shaft; 25, bevel gear one; 26, abutting member; 27, guide pipe; 3, drive shaft; 31, non-complete gear; 32, transmission belt; 33, bevel gear two; 34, transmission gear; 35, rack; 36, calibration plate; 37, light curtain strip; 4, pressure plate; 41, connecting rod; 42, sleeve; 43, positioning member; 44, sealing film. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. Embodiment One

[0028] Please refer to Figures 1 to 9The application provides a technical scheme: a high-sensitivity elevator door mechanism braking device, which comprises an elevator car 1 and a driving assembly at the bottom end of the elevator car 1, the driving assembly has two groups which are completely the same and are respectively located at the bottom end of the two sides of the elevator car 1, and the driving assembly is fixedly connected with the elevator car 1; the device further comprises a calibration assembly, the calibration assembly has two groups which are completely the same and are respectively located at the two ends of the inner wall of the elevator car 1, and the calibration assembly is fixedly connected with the elevator car 1, and the calibration assembly is in transmission connection with the driving assembly; the device further comprises a touch plate assembly, the touch plate assembly has four groups which are completely the same and are respectively located at the upper and lower ends inside the elevator car 1, and the touch plate assembly is fixedly connected with the elevator car 1; and the device further comprises a control module, which is located inside the touch plate assembly and is fixedly connected with the touch plate assembly.

[0029] In the application, the elevator car 1 is used as the power source of the whole device, the bottom floor of the elevator is used as the trigger condition of the calibration work, the trigger frequency of the calibration work can be maximized, and the regular maintenance of the elevator can be achieved; the driving device is installed at the bottom end of the elevator shaft, when the elevator runs to the bottom floor, the elevator car 1 extrudes the driving device, the driving device starts to work and drives the calibration assembly, the calibration assembly further calibrates the horizontal direction of the elevator light curtain; meanwhile, the driving assembly synchronously drives the touch plate assembly to perform the inflation and pressurization work inside the touch plate assembly, the touch plate assembly always maintains the pressurization state under the action of the driving assembly, so that the touch plate assembly always maintains high sensitivity and the service life of the touch plate assembly is prolonged; meanwhile, under the action of the pressurization state, the bottom end of the touch plate assembly always extrudes the elevator light curtain, and the vertical direction of the elevator light curtain is further calibrated. Embodiment two

[0030] The elevator car 1 comprises a car door 11, the car door 11 is located on one side of the elevator car 1 and is movably connected with the elevator car 1, a landing door 12 is in transmission connection with the side, away from the elevator car 1, of the car door 11, and the car door 11 and the landing door 12 are in transmission connection through a mortise and tenon structure.

[0031] The driving assembly comprises a gas tank 2, the gas tank 2 is fixedly connected with the outer wall of the bottom end of the car door 11, the inside of the gas tank 2 is penetrated and movably connected with a pressure roller 21, a pressure spring is arranged between the inner wall of the gas tank 2 and the axial top end of the pressure roller 21, the outer wall of the axial end of the pressure roller 21 close to the gas tank 2 is movably connected with a limiting piece one 22, the outer wall of the axial end of the pressure roller 21 far from the gas tank 2 is movably connected with a limiting piece two 23, the limiting piece one 22 and the limiting piece two 23 are fixedly connected with the outer wall of the bottom end of the car door 11, the outer wall of the axial middle part of the pressure roller 21 is fixedly connected with a convex shaft 24, the outer wall of the axial end of the pressure roller 21 close to the limiting piece two 23 is movably connected with a bevel gear one 25, the bottom end of the pressure roller 21 is fixedly connected with an abutting piece 26, the bottom end of the gas tank 2 is penetrated and fixedly connected with a conduit 27.

[0032] The specification of the abutting piece 26 is matched with the hydraulic buffer device at the bottom end of the elevator shaft, the pressure spring in the gas tank 2 is fixedly connected with the inner wall of the gas tank 2, and the pressure spring in the gas tank 2 is in contact with the top end of the pressure roller 21.

[0033] In use, during normal operation of the elevator, the elevator car 1 is in the state of up and down movement, the elevator car 1 is fixedly connected with the car door 11, so that the car door 11 moves together with the elevator car 1, and the landing door 12 is fixedly installed at the elevator port of each floor, that is, the car door 11 and the landing door 12 are in transmission connection through the mortise and tenon structure at the preset position, the transmission process corresponds to the elevator door opening and closing action, and the vertical movement of the car door 11 cannot be transmitted to the landing door 12, so that the landing door 12 remains stationary.

[0034] When the elevator car 1 descends to the bottom layer of the elevator shaft, the abutting piece 26 is in contact with and pressed by the hydraulic buffer device at the bottom end of the elevator shaft, the hydraulic buffer device is a prior art structure and will not be described in detail here; since the abutting piece 26 is fixedly connected with the pressure roller 21, the pressure roller 21 is synchronously pressed by the hydraulic buffer device and changes the positional relationship, and because the limiting piece one 22, the limiting piece two 23, the pressure roller 21 and the convex shaft 24 jointly form a cylindrical cam transmission structure, that is, with the change of the positional relationship of the pressure roller 21, the pressure roller 21 is synchronously rotated around its own axis under the action of the convex shaft 24, and the rotation angle is fixed at ninety degrees each time; with the vertical movement of the pressure roller 21, the pressure roller 21 synchronously presses the gas in the inner wall of the gas tank 2, so that the gas pressure in the gas tank 2 increases and further fills into the conduit 27; with the fixed shaft rotation of the pressure roller 21, the bevel gear one 25 starts to rotate synchronously, and the limiting and movable connection between the bevel gear one 25 and the conduit 27 ensures that the bevel gear one 25 will not fall off in the normal state and can transmit the rotation relationship of the pressure roller 21.

[0035] With the movement of the pressure roller 21 in the vertical direction, the pressure roller 21 begins to extrude the pressure spring of the inner wall of the gas tank 2, through the cooperation of the pressure spring and the hydraulic buffer device at the bottom end of the elevator shaft, the effective stroke of the buffer device is further expanded, thereby increasing the buffer distance of the elevator to provide more safety protection for passengers. Embodiment three

[0036] The calibration assembly includes a drive shaft 3 fixedly connected with the inner wall of the car door 11, the outer wall of the drive shaft 3 is fixedly connected with two incomplete gears 31, the two incomplete gears 31 are centrally symmetrically distributed, the outer wall of the drive shaft 3 axially close to one end of the incomplete gear 31 is drivingly connected with a transmission belt 32, the other end of the transmission belt 32 is drivingly connected with the drive shaft 3 of the other group of drive assemblies, the outer wall of the drive shaft 3 axially close to one end of the car door 11 is fixedly connected with a bevel gear two 33, the bevel gear two 33 is meshed and drivingly connected with the bevel gear one 25, the top end of the incomplete gear 31 is intermittently meshed and drivingly connected with a transmission gear 34, the transmission gears 34 are alternately meshed and drivingly connected, one end of the transmission gear 34 away from the bevel gear two 33 is meshed and drivingly connected with a rack 35, one end of the rack 35 away from the transmission gear 34 is fixedly connected with a calibration plate 36, the calibration plates 36 are placed with light curtain strips 37, and the light curtain strips 37 are fixedly connected with the inner wall of the car door 11.

[0037] The driving assembly located at the same side of the car door 11 is connected by the transmission belt 32, and the fixed shaft of the bevel gear 2 is rotated, and the fixed shaft of the bevel gear 3 is synchronously rotated and the single rotation angle is fixed as ninety degrees. Since the bevel gear 3 is fixedly connected with the driving shaft 3, the driving shaft 3 is fixedly connected with the incomplete gear 31, that is, the driving shaft 3 and the incomplete gear 31 start to synchronously rotate. With the rotation of the incomplete gear 31, the incomplete gear 31 and the transmission gear 34 present an intermittent meshing relationship. When the teeth of the incomplete gear 31 and the transmission gear 34 are in the corresponding position, the transmission gear 34 synchronously rotates and the rotation angle is ninety degrees. When the teeth of the incomplete gear 31 and the transmission gear 34 are not in the corresponding position, the transmission gear 34 remains stationary. Since the two incomplete gears 31 are centrally symmetrically distributed and the transmission gears 34 are intermeshed and connected, the motion trajectory of the transmission gear 34 is a continuously changing reciprocating rotation, and the motion directions of the intermeshed transmission gears 34 are opposite. Under the action of the transmission gear 34, the rack 35 is driven to move in the horizontal direction, and the rack 35 further drives the calibration plate 36 to move, that is, the motion trajectory of the calibration plate 36 is a reciprocating cycle of approaching and moving away from each other. The elevator car 1 descends to the bottom floor four times, and the pressure roller 21 rotates through a complete circle, that is, the calibration plate 36 realizes a reciprocating cycle. The calibration plate 36 calibrates the horizontal direction of the light curtain strip 37 by approaching each other, so that the light curtain strip 37 is offset and reset, thereby ensuring the sensitivity of the elevator door mechanism brake device. Embodiment four

[0038] The touch plate assembly comprises a pressure plate 4 located inside the car door 11 and connected with the car door 11 through a mortise and tenon structure, the pressure plate 4 is connected with the landing door 12 through a mortise and tenon structure, the bottom end of the pressure plate 4 is fixedly connected with a connecting rod 41, one end of the connecting rod 41 axially away from the pressure plate 4 penetrates and movably connects with a sleeve 42, the outer wall of the sleeve 42 is provided with a working hole, the working holes of the sleeve 42 are connected with each other through a connecting pipe, the working hole of the sleeve 42 is fixedly connected with the guide pipe 27, the one end of the connecting rod 41 axially away from the pressure plate 4 is fixedly connected with two positioning members 43, the two positioning members 43 are mirror-symmetrically distributed with the extension line of the center of the connecting rod 41 as the axis, the one end of the positioning member 43 away from the connecting rod 41 penetrates and movably connects with the working hole of the sleeve 42, and the one end of the sleeve 42 axially away from the connecting rod 41 is fixedly connected with a sealing film 44.

[0039] The control module comprises a signal generator, a receiver and a controller; the signal generator is located inside the sleeve 42 close to one end of the sealing film 44 and is fixedly connected with the sleeve 42, and the signal generator is arranged in a pressure switch mode; the receiver is located on the inner wall of the car door 11 and is fixedly connected with the car door 11, and the receiver is electrically connected with the signal generator; the controller is located on the inner wall of the car door 11 and is fixedly connected with the car door 11, and the controller is electrically connected with the receiver.

[0040] The sleeve 42 is made of a flexible pressure-resistant material, and the sleeve 42 has a high-strength bending reset capability.

[0041] With the increase of the pressure inside the gas tank 2, the gas enters the inside of the sleeve 42 through the conduit 27, at this time, the inside of the sleeve 42 is in a pressurized environment, and the sealing film 44 is inflated under the action of the gas pressure, and since the bottom end of the sleeve 42 abuts against the light curtain strip 37, that is, the inflation of the sealing film 44 further increases the pressure on the light curtain strip 37, thereby calibrating the longitudinal orientation of the light curtain strip 37 and further ensuring the high sensitivity of the light curtain strip 37; and the connecting rod 41 and the sleeve 42 will inevitably have gas dissipation during long-term work, and regular gas filling to the inside of the pressure plate 4 through the conduit 27 can ensure that the gas pressure inside the sleeve 42 is always within a predetermined range, thereby further improving the service life of the elevator door brake device.

[0042] The working hole of the sleeve 42 is sealed by the conduit 27 to ensure the airtight environment inside the sleeve 42;

[0043] During the opening and closing of the elevator door, the car door 11 and the landing door 12 are in transmission connection, at this time, the pressure plate 4 is synchronously connected through the mortise and tenon structure, that is, the pressure plate 4 synchronously opens and closes the elevator door, and since the pressure plate 4 is fixedly connected with the connecting rod 41, the connecting rod 41 moves synchronously; during the closing of the elevator door, the gas pressure inside the sleeve 42 gradually decreases, and the pressure gradually changes from the pressurized state to the negative pressure state, that is, the force required for the connecting rod 41 to shrink into the inside of the sleeve 42 becomes smaller and smaller, and correspondingly, the trigger pressure threshold of the pressure plate 4 gradually decreases, that is, with the gradual closing of the elevator door, the sensitivity of the elevator door brake device gradually increases, thereby making the sensitivity of the brake device further meet the actual use requirements.

[0044] When the pressure on the pressure plate 4 is greater than the threshold value, the matching relationship between the positioning member 43 and the sleeve hole 42 is contacted, the connecting rod 41 is retracted into the sleeve 42 and further contacts the signal generator; the signal generator is set to be in pressure switch mode, when the connecting rod 41 contacts it, a signal is sent, the receiver located in the inside of the car door 11 receives the signal and further transmits it to the controller, the controller controls the traction system and the brake system of the elevator, so that the car door 11 is changed from the closed state to the open state, thereby providing the anti-pinch function for the elevator door, and further ensuring the sensitivity of the elevator door mechanism brake device.

[0045] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A high-sensitivity elevator door machine braking device, comprising an elevator car (1) and a drive assembly at the bottom end thereof, characterized in that: The driving assembly has two groups which are completely same and are respectively located at the bottom end of the two sides of the elevator car (1), and the driving assembly is fixedly connected with the elevator car (1); The calibration assembly has two groups which are completely same and are respectively located at the two ends of the inner wall of the elevator car (1), and the calibration assembly is fixedly connected with the elevator car (1), and the calibration assembly is drivingly connected with the driving assembly; The touch plate assembly has four groups which are completely same and are respectively located at the upper and lower ends of the inside of the elevator car (1), and the touch plate assembly is fixedly connected with the elevator car (1); The control module is located in the inside of the touch plate assembly and is fixedly connected with the touch plate assembly; The calibration assembly comprises a driving shaft (3), the inner wall of the car door (11) is fixedly connected with the driving shaft (3), the outer wall of the driving shaft (3) in the axial direction is fixedly connected with two non-complete gears (31), the two non-complete gears (31) are centrally symmetrically distributed, the outer wall of the driving shaft (3) in the axial direction close to one end of the non-complete gear (31) is drivingly connected with a transmission belt (32), the other end of the transmission belt (32) is drivingly connected with the driving shaft (3) of the other group of driving assemblies, the outer wall of the driving shaft (3) in the axial direction close to one end of the car door (11) is fixedly connected with a bevel gear two (33), the bevel gear two (33) is meshed with and drivingly connected with the bevel gear one (25), the top ends of the non-complete gears (31) are intermittently meshed with and drivingly connected with transmission gears (34), the transmission gears (34) are interlacedly meshed with and drivingly connected with each other, one end of the transmission gear (34) away from the bevel gear two (33) is meshed with and drivingly connected with a rack (35), one end of the rack (35) away from the transmission gear (34) is fixedly connected with a calibration plate (36), the calibration plates (36) are located with light curtain strips (37), and the inner wall of the car door (11) is fixedly connected with the light curtain strips (37); The touch plate assembly comprises a pressure plate (4), the pressure plate (4) is located in the inside of the car door (11) and is drivingly connected with the car door (11) through a mortise and tenon structure, the pressure plate (4) is drivingly connected with the layer door (12) through the mortise and tenon structure, the bottom end of the pressure plate (4) is fixedly connected with a connecting rod (41), one end of the connecting rod (41) in the axial direction away from the pressure plate (4) penetrates and is movably connected with a sleeve (42), the outer wall of the sleeve (42) is provided with a working hole, the working holes of the sleeve (42) are communicated with each other through connecting pipes, the working holes of the sleeve (42) are fixedly connected with the guide pipe (27), one end of the connecting rod (41) in the axial direction away from the pressure plate (4) is fixedly connected with two positioning members (43), the two positioning members (43) are mirror-symmetrically distributed with the extension line of the center of the connecting rod (41) as the axis, one end of the positioning member (43) away from the connecting rod (41) penetrates and is movably connected in the working hole of the sleeve (42), and one end of the sleeve (42) in the axial direction away from the connecting rod (41) is fixedly connected with a sealing film (44).

2. A high sensitivity elevator door machine braking device according to claim 1, characterized in that: The elevator car (1) includes a car door (11), which is located on one side of the elevator car (1) and is movably connected with the elevator car (1), and the car door (11) is drivingly connected with a landing door (12) away from one side of the elevator car (1), and the car door (11) and the landing door (12) are drivingly connected through a mortise structure.

3. A high sensitivity elevator door machine braking device according to claim 1, characterized in that: The driving assembly includes a gas tank (2), the gas tank (2) is fixedly connected with the outer wall of the bottom end of the car door (11), the inside of the gas tank (2) is penetrated and movably connected with a pressure roller (21), a pressure spring is arranged between the inner wall of the gas tank (2) and the axial top end of the pressure roller (21), the outer wall of one end of the pressure roller (21) axially close to the gas tank (2) is movably connected with a limiting piece one (22), the outer wall of one end of the pressure roller (21) axially away from the gas tank (2) is movably connected with a limiting piece two (23), the limiting piece one (22) and the limiting piece two (23) are fixedly connected with the outer wall of the bottom end of the car door (11), the outer wall of the axial middle part of the pressure roller (21) is fixedly connected with a convex shaft (24), the outer wall of one end of the pressure roller (21) axially close to the limiting piece two (23) is movably connected with a bevel gear one (25), the bottom end of the pressure roller (21) is fixedly connected with an abutting piece (26), and the bottom end of the gas tank (2) is penetrated and fixedly connected with a conduit (27).

4. A high sensitivity elevator door machine braking device according to claim 1, characterized in that: The control module includes a signal generator, a receiver and a controller; The signal generator is located inside the sleeve (42) close to one end of the sealing film (44) and is fixedly connected with the sleeve (42), and the signal generator is arranged in a pressure switch mode; The receiver is located on the inner wall of the car door (11) and is fixedly connected with the car door (11), and the receiver is electrically connected with the signal generator; The controller is located on the inner wall of the car door (11) and is fixedly connected with the car door (11), and the controller is electrically connected with the receiver.

5. A high sensitivity elevator door gear braking device according to claim 3, characterized in that: The abutting piece (26) is matched with the hydraulic buffer device at the bottom end of the elevator shaft, the pressure spring in the gas tank (2) is fixedly connected with the inner wall of the gas tank (2), and the pressure spring in the gas tank (2) and the top end of the pressure roller (21) are in contact with each other.

6. A high sensitivity elevator door machine braking device as defined in claim 1, wherein: The sleeve (42) is made of flexible and pressure-resistant material, and the sleeve (42) has high bending reset ability.

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