CN217602421U - Platform door driving unit - Google Patents

Abstract

The utility model discloses a platform door driving unit, which consists of a driving motor, a gear seat, a gear, a rack, a motor braking component and a manual unlocking component, wherein the gear seat is arranged on a platform door bottom plate and passes through the gap of a platform door track, the gear is horizontally arranged in the gear seat, the gear and the rack are meshed below the platform door track, an output shaft of the driving motor extends into the gear seat and is connected with the gear, and the gear is controlled to move along the rack by the driving motor; the motor braking assembly is used for locking a motor shaft of the driving motor after power failure, so that the in-place locking function of the door body is realized; the manual unlocking assembly is used for manually unlocking the motor shaft of the driving motor by the motor braking assembly, so that the motor shaft of the driving motor can rotate smoothly. The utility model discloses compact structure, drive control are convenient, operation safety and stability is reliable, the door body targets in place and outage automatic locking, outage are from restoring to the throne, fundamentally has solved the difficult, difficult and the poor problem of fail safe nature of drive control of the portable novel platform door of full open.

Description

Platform door driving unit

Technical Field

The utility model relates to a track traffic platform door technical field especially relates to a platform door drive unit.

Background

Track traffic station generally sets up the platform door at the platform edge, with the track district with wait the district isolation, the purpose is in order to guarantee normal operation of train and passenger's safety, improves the environment of waiting, promotes the comfort level that the passenger waited. Most of the existing rail platform doors are fixed platform doors. The opening position of the platform door is fixed, the opening is limited, and the platform door is suitable for urban rails such as subways and light rails or other rail platforms of single vehicle types. However, the high-speed railway platform and the intercity railway platform in China have the requirements of train parking platforms of various types due to various reasons, and the precision of the train parking position is lower than that of a subway and a light rail, so that the requirement of the type adaptability of the platform to platform doors is higher than that of the conventional subway safety door. Therefore, a can satisfy platform door application market demand that multi-vehicle type stopped needs and wait to release urgently, this kind of platform door system full length is movable, and all door bodies are the last sliding door of tradition meaning, and divide main door and vice door, and vice door opens and shuts at the structure of main door, and the main door moves at platform door edge, under the cooperation of each movable door unit, can realize that the platform optional position opens the door and super large door opening degree function.

The transmission system of the existing fixed platform door is a fixed platform door transmission system mainly based on belt transmission and screw rod transmission, the transmission system only meets the requirements of stable and reliable transmission, simple structure, convenience in installation and maintenance and service life, but has the limitations of short transmission distance, large structure size and mutual independence of each unit transmission system, and cannot be applied to a novel full-motion platform door with movable full length.

The novel full-motion platform door has the advantages that the requirement on the transmission system is more complex than that of the original platform door, the structure is stable and reliable, the safety is high, the functional requirement that the transmission distance is not limited is met, and meanwhile, all door bodies of the full-motion platform door can move, so that the novel transmission system has new requirements on the installation position and the space of the transmission system, and the appearance requirement of small and compact structure is met.

The fully-moving platform door has high requirements on the transmission mechanism and also has very strict requirements on the braking function of the transmission mechanism. In traditional platform door, adopt direct current motor, mechanical lock or electromagnetic lock to add the mode of zero position switch more and realize a body drive control and a door locking function that targets in place, the system utilizes direct current motor's hall signal feedback to realize the location to door body position more, nevertheless when the condition that cuts off the power supply or the signal of telecommunication loses takes place the back, corresponding positional information will be lost to the system, then need reset and confirm a body zero position again through zero position switch this moment. This type of braking device is suitable for movements with defined direction of action and defined travel, has good adaptability and reliability, and has been successful on rail transit platform doors. However, when the platform door system has some special working conditions, for example, the motor may rotate forward or backward under the action of opening the door, the position of the motion end is uncertain, and the door body needs to be locked at different positions, the conventional platform door braking device loses its adaptability and reliability under these conditions, and cannot provide a reliable basis for the safety requirements of the system. These above problems present a significant challenge to the security and reliability of such new platform doors.

Therefore, a platform door driving unit based on the use conditions of a fully-open movable novel platform door, which has the advantages of compact structure, safe, stable and reliable operation, in-place locking of a door body, automatic locking in power failure, self-resetting in power failure and cost consideration, is urgently needed to be developed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that prior art exists, provide a simple structure, structure overall dimension is little, reliable and stable, the security is high, the motion distance is unlimited, can infinitely dock and continue, and can realize that the door body targets in place the locking, the automatic locking of outage, the outage is from restoring to the throne to the platform door drive unit of the corresponding unblock scheme of adaptation, fundamentally has solved the accessible function requirement that opens the door of the all movable platform door of opening of all equal movable of the door body.

The utility model discloses a thus realized, a platform door drive unit comprises driving motor, pinion stand, gear, rack, motor brake assembly and manual unblock subassembly, the pinion stand is installed on platform door bottom plate and passes the orbital clearance of platform door, level setting the gear in the pinion stand, wheel and rack mesh below platform door track, the output shaft of driving motor stretches into the pinion stand and is connected with the gear, moves along the rack through driving motor control gear;

the motor brake assembly is connected with the driving motor and used for locking a motor shaft of the driving motor after power failure, so that the in-place locking function of the door body is realized; a motor shaft of the driving motor is connected with an output shaft of the driving motor;

the manual unlocking assembly is connected with the motor braking assembly and used for manually unlocking the motor braking assembly to the motor shaft of the driving motor, so that the motor shaft of the driving motor can rotate smoothly.

Preferably, the upper part of the gear seat is of a circular double-layer flange structure with a through hole at the center, the upper-layer flange is used for mounting the driving motor, an output shaft of the driving motor penetrates through the through hole to be connected with the gear, and the lower-layer flange is used for mounting the gear seat on a platform door bottom plate;

the lower part of the gear seat is of a plate-type clip structure, the plate-type clip structure is used for being matched with the platform door track and penetrating through a gap of the platform door track, and the gear is positioned on the lower part of the inner side of the plate-type clip structure;

the lower part of the gear seat is vertically arranged and rigidly connected with the upper part of the gear seat, and the upper part of the gear seat covers the lower part of the gear seat.

Further preferably, the diameter of the upper-layer flange is smaller than that of the lower-layer flange.

Further preferably, the bottom of the plate-type clip structure is provided with a mounting seat hole, a bearing is installed in the mounting seat hole, a bushing is arranged between the bearing and the gear, one end of the bushing is in contact with the inner ring of the bearing, the other end of the bushing is in contact with the gear, an output shaft of the driving motor is connected with the gear through a flat key, sequentially penetrates through the gear and the bushing, and is connected with the bearing.

Preferably, the motor braking assembly comprises a motor brake and an absolute value encoder, and a motor shaft of the driving motor penetrates through the motor brake and is connected with the absolute value encoder; the motor brake is used for locking a motor shaft of the driving motor after power failure, so that the in-place locking function of the door body is realized; the absolute value encoder is used for memorizing the rotation angle of a motor shaft of the driving motor, outputting corresponding position parameters and having a power-off memory function.

Preferably, the motor brake comprises a magnetic yoke assembly, an armature, a shaft sleeve, a friction plate, a spring and a connecting plate, wherein the magnetic yoke assembly and the armature are sequentially sleeved on the motor shaft, a spring groove for accommodating the spring is formed in the side, close to the armature, of the magnetic yoke assembly, one end of the spring is abutted with the magnetic yoke assembly, and the other end of the spring is abutted with the armature; the shaft sleeve is fixedly connected with a motor shaft through a set screw, so that the armature can move between the shaft sleeve and the magnetic yoke assembly when power is lost, the friction plate is positioned between the connecting plate and the armature and is fixed on the armature, and the connecting plate is fixed on the driving motor.

Preferably, manual unblock subassembly includes manual unblock spanner, manual unblock spanner passes the yoke subassembly through connecting bolt and links to each other with armature, the interval between manual unblock spanner and the motor brake is from being close to connecting bolt side direction and keeping away from connecting bolt side grow gradually for touch and press manual unblock spanner can pull back armature towards the yoke subassembly direction.

Further preferably, the manual unlocking assembly further comprises a manual unlocking device and a manual unlocking steel cable, one end of the manual unlocking steel cable is connected with the manual unlocking device, and the other end of the manual unlocking steel cable is connected with the side, far away from the connecting bolt, of the manual unlocking wrench; manual unlocking device includes manual unblock handle, unblock connecting rod and manual unblock base, the rotatable installation of manual unblock handle one end is on manual unblock base, and the manual unblock handle other end and unblock connecting rod one end butt, the rotatable installation of unblock connecting rod is on manual unblock base, and the unblock connecting rod other end is connected with manual unblock cable wire.

Further preferably, two ends of the manual unlocking steel cable are movably connected with the unlocking connecting rod and the manual unlocking wrench respectively.

Preferably, the absolute value encoder is a gear multi-turn absolute value encoder.

The utility model has the advantages and positive effects be:

1. the utility model adopts the gear rack transmission structure, integrates the driving of all platform doors into one set, and is arranged in a whole length, thereby greatly reducing the structural size and the space of the driving unit, and ensuring that all platform doors can realize the situation that the movement distance is not limited under the mutual cooperation, and the utility model has the advantages of simple structure, small structural overall dimension, stable and reliable transmission, high safety, unlimited movement distance, unlimited butt joint and continuation and the like; and the underneath type structure for transmission is arranged below the platform door track, so that the gear and the rack can be isolated, the safety factor is high, the safety requirement of passengers for getting on or off the train is met, the service life of the gear and the rack is prolonged, the artificial abrasion and damage caused by the exposure of the gear and the rack are avoided, the interference on a driving system is avoided, the platform door is matched with the platform door track, and the running is ensured to be more stable.

2. The upper part of the gear seat of the utility model adopts a circular double-layer flange structure with a through hole at the center, which is convenient for installing and disassembling the driving motor and the gear seat, and avoids the particle sundries at the platform plate from falling into the gear to influence the working performance of the gear; the lower part adopts a plate-type square-shaped structure, the rigidity is improved by rigid connection, the gear can be well connected with the driving motor and the rack, and meanwhile, the gear can be limited and restrained up and down, so that the gear is convenient to be matched with the platform door track, the small width of the gap of the platform door track can be adapted to move, the guide effect can be realized, the transverse bearing capacity of the output shaft of the driving motor is reduced, and the gear and the rack can be always kept in a good meshing state; the design of whole pinion stand makes whole transmission part's structure compacter, and life is longer, and operating stability is better, has satisfied the passenger simultaneously and has passed a station to the orbital security requirement of platform door.

3. The utility model discloses a rack and pinion transmission adopts the horizontal drive mode, and to a great extent reduces vibrations for the driving force is bigger, and rack and pinion interlock motion is more steady, transmission efficiency is high, makes the motion and the braking of platform door easier.

4. The utility model discloses a gear of every platform door moves on the rack that leads to long, and through the cooperation between each platform door, can solve the platform door demand that the multi-vehicle type berthed the track platform, satisfies the platform door function demand that the demand and the big aperture opened the door of multiposition arbitrary position even opened the door.

5. The utility model discloses a brake assembly is different from in the past and is applied to the platform door body braking of confirming the action direction and confirming the stroke, and motor brake and absolute value encoder module are introduced in the innovation, for the platform door of the indefinite stroke of two-way motion, have laid the hardware basis that drives locking function, overturn in the past and adopt the design of door body structure locking, combine rack and pinion drive mechanism and utilize the motor shaft to brake the locking and realize the door body locking function; meanwhile, a motor brake and a manual unlocking component are innovated and developed, and an emergency escape unlocking function on the basis of a motor locking function is realized. The driving unit adopts a direct-current brushless speed reduction motor, is low in cost, simple to control, free of losing position information in power failure and capable of automatically locking in power failure, ensures the safety protection function of the platform door under the unexpected condition, is very high in safety and reliability, and fundamentally solves the problems of difficulty in driving and controlling, difficulty in-place locking and poor safety and reliability of a full-open movable novel platform door.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a perspective view of a platform door driving unit according to an embodiment of the present invention;

fig. 2 is a side view of a platform door drive unit provided by an embodiment of the present invention;

fig. 3 is an exploded schematic view of a gear, a gear seat and a driving motor according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion A of FIG. 1;

fig. 5 is a schematic structural diagram of the inside of the motor brake provided by the embodiment of the present invention.

Description of reference numerals:

1. a drive motor; 101. an output shaft of the drive motor; 102. a motor shaft of the driving motor;

2. a motor brake; 201. a yoke assembly; 202. a shaft sleeve; 203. an armature; 204. a friction plate; 205. a coupling plate; 206. a spring; 207. tightening the screw; 3. an absolute value encoder;

4. manually unlocking the wrench; 401. a connecting bolt;

5. a manual unlocking device; 501. a manual unlocking handle; 502. unlocking the connecting rod; 503. manually unlocking the base;

6. manually unlocking the wire rope;

7. a gear seat; 701. a through hole; 702. mounting a base hole; 8. a gear; 9. a flat bond; 10. a bushing; 11. a bearing; 12. a rack; 13. a platform door floor; 14. platform door track.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 3, the present embodiment provides a platform door driving unit, which is composed of a driving motor 1, a gear seat 7, a gear 8, a rack 12, a motor braking assembly and a manual unlocking assembly, wherein the driving motor 1 is installed on the gear seat 7, the gear seat 7 is installed on a platform door bottom plate 13 and penetrates through a gap of a platform door track 14, the gear 8 is horizontally arranged in the gear seat 7, the gear 8 is engaged with the rack 12 below the platform door track 14, an output shaft 101 of the driving motor extends into the gear seat 7 to be connected with the gear 8, and the gear 8 is controlled to move along the rack 12 by the driving motor 1; the driving system integrates the driving of all platform doors into a set of driving system by adopting a gear rack transmission mechanism, is arranged in a full length way, and has the advantages of simple structure, small structural overall dimension, stability, reliability, high safety, unlimited movement distance, infinite butt joint and continuity and the like. The gear rack transmission adopts a horizontal transmission mode, so that the vibration is reduced to a great extent, the transmission force is larger, the gear rack meshing motion is more stable, the transmission efficiency is high, and the motion and the braking of the platform door are easier.

The motor brake assembly is connected with the driving motor 1 and used for locking a motor shaft 102 of the driving motor after power failure, so that the in-place locking function of the door body is realized; a motor shaft 102 of the driving motor is connected with an output shaft 101 of the driving motor; the manual unlocking assembly is connected with the motor braking assembly and used for manually unlocking the motor shaft 102 of the driving motor by the motor braking assembly, so that the motor shaft 102 of the driving motor can smoothly rotate. The door body locking function is realized by means of motor shaft braking locking, and meanwhile, the emergency escape unlocking function on the basis of the motor locking function is realized, so that the safety and reliability of the driving unit are higher, and the problems of difficult driving control, difficult in-place locking and poor safety and reliability of the full-open movable novel platform door are fundamentally solved.

The upper part of the gear seat 7 is of a circular double-layer flange structure with a through hole at the center, an upper-layer flange is used for mounting the driving motor 1, an output shaft 101 of the driving motor penetrates through the through hole 701 to be connected with the gear 8, and a lower-layer flange is used for mounting the gear seat 7 on a platform door bottom plate 13; the lower part of the gear seat 7 is of a plate-type return structure, the plate-type return structure is matched with the platform door rail 14 and used for penetrating through a gap of the platform door rail 14, the gear 8 is horizontally arranged on the lower part of the inner side of the plate-type return structure, the gear 8 can be well connected with the driving motor 1 and the rack 12, meanwhile, the gear 8 can be limited and restrained up and down, the gear seat is safe, stable and reliable, and is convenient to be matched with the platform door rail 14, the gear seat can not only adapt to small-width movement of the gap of the platform door rail 14, but also play a role in guiding, meanwhile, the transverse bearing capacity of the output shaft 101 of the driving motor is reduced, the gear rack can be always kept in a good meshing state, the whole driving unit is more compact in structure due to the design of the whole gear seat 7, the service life is longer, the operation stability is better, and meanwhile, and the safety requirement of passengers on the platform board when the passengers cross the station is met.

The lower part of the gear seat 7 and the upper part of the gear seat 7 are vertically arranged and rigidly connected, so that the rigidity is improved, and the upper part of the gear seat 7 covers the lower part of the gear seat 7, so that the influence on the working performance of the gear 8 caused by the falling of particle impurities at the platform door track 14 into the gear 8 is avoided. The transmission part adopts an underlying structure for transmission below the platform door track 14, the rack and pinion is isolated from the external environment through the platform door track 14, the damage of pollutants and artificial conditions to the rack and pinion is effectively avoided, the safety factor is high, the safety requirement of passengers for getting on or off the train is met, the service life of the rack and pinion is prolonged, the artificial abrasion and damage caused by the exposure of the rack and pinion are avoided, the interference to a driving system is avoided, the transmission reliability and safety are improved, the platform door is matched with the platform door track 14, and the operation is more stable.

The diameter of the upper-layer flange plate is smaller than that of the lower-layer flange plate, so that the driving motor 1 and the gear seat 7 are convenient to mount and dismount.

The bottom of plate-type structure of returning is provided with mount pad hole 702, install bearing 11 in the mount pad hole 702, be provided with bush 10 between bearing 11 and the gear 8, bush 10 one end is inconsistent with bearing 11 inner circle, and the other end is inconsistent with gear 8, driving motor's output shaft 101 passes through the parallel key and is connected with gear 8, and passes gear 8, bush 10 in proper order, is connected with bearing 11. The central axes of the gear base 7, the gear 8, the mounting base hole 702 and the output shaft 101 of the driving motor are coaxial. The bushing 10 is arranged between the gear 8 and the bearing 11 and sleeved on an output shaft 101 of the driving motor to play roles of blocking and limiting; the end of the output shaft 101 of the drive motor is connected to the inner race of the bearing 11. The gear 8 is engaged with the rack 12, and the driving motor 1 controls the output shaft 101 of the driving motor to rotate so as to drive the gear 8 to move on the teeth, in this embodiment, the driving motor 1 is a dc brushless speed reducing motor.

Referring to fig. 4 and 5, the motor brake assembly includes a motor brake 2 and an absolute value encoder 3, and a motor shaft 102 of the driving motor passes through the motor brake 2 and is connected to the absolute value encoder 3; the motor brake 2 is used for locking a motor shaft 102 of the driving motor after power failure, so that the in-place locking function of the door body is realized; the absolute value encoder 3 is used for memorizing the rotation angle of the motor shaft 102 of the driving motor, outputting corresponding position parameters, and having a power-off memory function, so that even if the door body is manually moved after power-off, the accurate relative zero position can be obtained according to the specific position information output by the absolute value encoder 3 after power restoration. The absolute value encoder 3 is a gear multi-turn absolute value encoder, and the specific model can be selected from Shanghai's 281565630 automatic GME-58-RS-13/12-0.5-10/28-SGM-65-B absolute value encoders. By introducing the motor brake 2 and the absolute value encoder 3 module, a hardware basis for controlling the driving and locking functions is laid for the platform door with bidirectional movement and indefinite travel; the design of locking a movable box body structure is adopted in the past in a subversion mode, and the function of locking the box body is achieved by combining a gear rack transmission mechanism and utilizing motor shaft brake locking. The driving motor 1 adopts a direct-current brushless speed reducing motor, is low in cost, simple to control, free of losing position information in power failure and capable of being automatically locked in power failure, the safety protection function of the platform door under the accident condition is guaranteed, and safety and reliability are very high.

The motor brake 2 comprises a magnetic yoke assembly 201, an armature 203, a shaft sleeve 202, a friction plate 204, a spring 206 and a connecting plate 205, wherein the magnetic yoke assembly 201 and the armature 203 are sequentially sleeved on a motor shaft 102 of the driving motor, a spring groove for accommodating the spring 206 is formed in the side, close to the armature 203, of the magnetic yoke assembly 201, one end of the spring 206 is abutted against the magnetic yoke assembly 201, and the other end of the spring 206 is abutted against the armature 203; the shaft sleeve 202 is fixedly connected with the motor shaft 102 of the driving motor through a set screw 207, so that the armature 203 can move between the shaft sleeve 202 and the magnetic yoke assembly 201 when power is lost, the friction plate 204 is positioned between the connecting plate 205 and the armature 203 and is fixed on the armature 203, and the connecting plate 205 is fixed on the driving motor 1. Under the condition of electrification, the magnetic yoke assembly 201 attracts the armature 203, a gap is reserved between the friction plate 204 and the connecting plate 205, and the motor shaft 102 of the driving motor rotates smoothly; after power failure, the magnetic yoke assembly 201 loses effect, the adsorption force between the magnetic yoke assembly 201 and the armature 203 disappears, the spring 206 recovers deformation and extrudes the armature 203, the friction plate 204 is attached to the connecting plate 205, the motor shaft 102 of the driving motor is braked, and the effect of power failure braking is achieved.

The manual unlocking assembly comprises a manual unlocking wrench 4, the manual unlocking wrench 4 penetrates through the magnetic yoke assembly 201 through a connecting bolt 401 to be connected with the armature 203, the distance between the manual unlocking wrench 4 and the motor brake 2 gradually increases from the side close to the connecting bolt 401 to the side far away from the connecting bolt 401, and the armature 203 can be pulled back towards the magnetic yoke assembly 201 by pressing the manual unlocking wrench 4. At this time, a gap is generated between the friction plate 204 and the coupling plate 205, the motor shaft 102 of the driving motor rotates smoothly, the driving motor 1 is in a free state, the unlocking is successful, and the movable box can move arbitrarily. The manual unlocking assembly solves the emergency escape function of the platform door.

For more convenient operation, the manual unlocking assembly further comprises a manual unlocking device 5 and a manual unlocking steel cable 6, one end of the manual unlocking steel cable 6 is movably connected with the manual unlocking device 5, and the other end of the manual unlocking steel cable is movably connected with the side, far away from the connecting bolt 401, of the manual unlocking wrench 4; manual unlocking device 5 includes manual unblock handle 501, unblock connecting rod 502 and manual unblock base 503, the rotatable installation of manual unblock handle 501 one end is on manual unblock base 503, and the other end of manual unblock handle 501 and unblock connecting rod 502 one end butt, the rotatable installation of unblock connecting rod 502 is on manual unblock base 503, and the unblock connecting rod 502 other end is connected with manual unblock cable 6. The manual unlocking handle 501 of the manual unlocking device 5 is pressed to drive the unlocking connecting rod 502 to rotate, the unlocking connecting rod 502 pulls the manual unlocking steel cable 6, the other end of the manual unlocking steel cable 6 drives the pressing manual unlocking wrench 4, the armature 203 of the motor brake 2 is pulled back, the motor brake 2 is released, the motor brake 2 is unlocked to lock the motor shaft 102 of the driving motor, and the motor shaft 102 of the driving motor rotates smoothly.

Each platform door driving unit is fixed on a platform door bottom plate 13 and extends out of a set of gear seat 7 and a set of gear 8, when a platform door system receives a door opening instruction and calls corresponding platform door position parameters, the system drives a direct-current brushless speed reduction motor to enable the gear 8 to move along a rack 12 butted in full length, so that the platform door reaches a specific position, the position of the platform door is checked according to position information in an absolute value encoder 3, after the platform door reaches a required position, the motor brake 2 is powered off, a motor shaft 102 of the driving motor is locked, and the platform door is locked in place at the moment.

The position information of the absolute value encoder 3 is determined by the mechanical position, and when power failure and electric signal loss occur, the system can also determine the specific position of the platform door after power restoration and continue to complete the next action.

6 one end of manual unblock cable wire is connected with manual unlocking device 5, and one end is connected with manual unblock spanner 4, touches and presses manual unlocking device 5, and manual unblock cable wire 6 compresses tightly manual unblock spanner 4, releases motor brake 2, the brushless gear motor of direct current belongs to free state this moment, and the platform door can remove wantonly.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (10)

1. A platform door driving unit is characterized by comprising a driving motor, a gear seat, a gear, a rack, a motor braking assembly and a manual unlocking assembly, wherein the gear seat is installed on a platform door bottom plate and penetrates through a gap of a platform door track, the gear is horizontally arranged in the gear seat, the gear and the rack are meshed below the platform door track, an output shaft of the driving motor extends into the gear seat and is connected with the gear, and the gear is controlled to move along the rack through the driving motor;

the motor braking assembly is connected with the driving motor and used for locking a motor shaft of the driving motor after power failure, so that the in-place locking function of the door body is realized; a motor shaft of the driving motor is connected with an output shaft of the driving motor;

the manual unlocking assembly is connected with the motor braking assembly and used for manually unlocking the motor braking assembly to the motor shaft of the driving motor, so that the motor shaft of the driving motor can rotate smoothly.

2. The platform door driving unit according to claim 1, wherein the gear seat has a circular double-layered flange structure with a through hole at the center, the upper flange is used for mounting the driving motor, the output shaft of the driving motor passes through the through hole to be connected with the gear, and the lower flange is used for mounting the gear seat on the platform door bottom plate;

the lower part of the gear seat is of a plate-type clip structure, the plate-type clip structure is used for being matched with the platform door track and penetrating through a gap of the platform door track, and the gear is positioned at the lower part of the inner side of the plate-type clip structure;

the lower part of the gear seat is vertically arranged and rigidly connected with the upper part of the gear seat, and the upper part of the gear seat covers the lower part of the gear seat.

3. A platform door drive unit according to claim 2, wherein the upper flange has a diameter smaller than the diameter of the lower flange.

4. A platform door driving unit according to claim 2, wherein the bottom of the plate-type return structure is provided with a mounting hole, a bearing is installed in the mounting hole, a bushing is arranged between the bearing and the gear, one end of the bushing is abutted against the inner ring of the bearing, the other end of the bushing is abutted against the gear, and the output shaft of the driving motor is connected with the gear through a flat key, sequentially passes through the gear and the bushing, and is connected with the bearing.

5. A platform door drive unit according to claim 1, wherein the motor brake assembly comprises a motor brake and an absolute encoder, the motor shaft of the drive motor passing through the motor brake and being connected to the absolute encoder; the motor brake is used for locking a motor shaft of the driving motor after power failure, so that the in-place locking function of the door body is realized; the absolute value encoder is used for memorizing the rotation angle of a motor shaft of the driving motor, outputting corresponding position parameters and having a power-off memory function.

6. The platform door driving unit according to claim 5, wherein the motor brake includes a yoke assembly, an armature, a shaft sleeve, a friction plate, a spring and a coupling plate, the yoke assembly and the armature are sequentially sleeved on the motor shaft, the yoke assembly is provided with a spring groove for accommodating the spring at a side close to the armature, one end of the spring abuts against the yoke assembly, and the other end abuts against the armature; the shaft sleeve is fixedly connected with a motor shaft through a set screw, so that the armature can move between the shaft sleeve and the magnetic yoke assembly when power is lost, the friction plate is positioned between the connecting plate and the armature and is fixed on the armature, and the connecting plate is fixed on the driving motor.

7. The platform door drive unit of claim 1, wherein the manual release assembly includes a manual release wrench coupled to the armature through the yoke assembly via a connecting bolt, and wherein the spacing between the manual release wrench and the motor brake increases from a side closer to the connecting bolt to a side further from the connecting bolt, such that pressing the manual release wrench pulls the armature back toward the yoke assembly.

8. The platform door drive unit of claim 7, wherein the manual unlocking assembly further comprises a manual unlocking device and a manual unlocking cable, the manual unlocking cable having one end connected to the manual unlocking device and one end connected to a side of the manual unlocking wrench away from the connection bolt; manual unlocking device includes manual unblock handle, unblock connecting rod and manual unblock base, the rotatable installation of manual unblock handle one end is on manual unblock base, and the manual unblock handle other end and unblock connecting rod one end butt, the rotatable installation of unblock connecting rod is on manual unblock base, and the unblock connecting rod other end is connected with manual unblock cable wire.

9. The platform door drive unit of claim 8, wherein both ends of the manual unlocking cable are movably connected to the unlocking link and the manual unlocking wrench, respectively.

10. A platform door drive unit according to claim 5, wherein the absolute value encoder is a geared multi-turn absolute value encoder.

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