CN110295804B - Passive lock for platform door and platform door - Google Patents

Passive lock for platform door and platform door Download PDF

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Publication number
CN110295804B
CN110295804B CN201910525426.1A CN201910525426A CN110295804B CN 110295804 B CN110295804 B CN 110295804B CN 201910525426 A CN201910525426 A CN 201910525426A CN 110295804 B CN110295804 B CN 110295804B
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CN
China
Prior art keywords
locking
positioning
lock
main shaft
cam
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Application number
CN201910525426.1A
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Chinese (zh)
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CN110295804A (en
Inventor
史和平
任金龙
张凌云
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Shanghai Jiacheng Railway Transportation Safety System Corp
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Shanghai Jiacheng Railway Transportation Safety System Corp
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Priority to CN201910525426.1A priority Critical patent/CN110295804B/en
Publication of CN110295804A publication Critical patent/CN110295804A/en
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B1/00—General arrangement of stations, platforms, or sidings; Railway networks; Rail vehicle marshalling systems
    • B61B1/02—General arrangement of stations and platforms including protection devices for the passengers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/0065—Operating modes; Transformable to different operating modes
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/14—Arrangement of several locks or locks with several bolts, e.g. arranged one behind the other
    • E05B63/146—Arrangement of several locks or locks with several bolts, e.g. arranged one behind the other locks with two or more bolts, each bolt itself being a tumbler
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/0007—Locks or fastenings for special use for gates
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/08—Locks or fastenings for special use for sliding wings
    • E05B65/0864—Locks or fastenings for special use for sliding wings the bolts sliding perpendicular to the wings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/60—Power-operated mechanisms for wings using electrical actuators
    • E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
    • E05F15/632—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings
    • E05F15/643—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for horizontally-sliding wings operated by flexible elongated pulling elements, e.g. belts, chains or cables
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/40—Application of doors, windows, wings or fittings thereof for gates
    • E05Y2900/404—Application of doors, windows, wings or fittings thereof for gates for railway platform gates

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The invention discloses a passive lock of a platform door and the platform door with the passive lock, wherein the passive lock comprises a lock seat and a locking mechanism; the lock seat comprises a frame body surrounded by an upper cover plate, a lower cover plate, a left side plate and a right side plate; the locking mechanism mainly comprises a locking main shaft and two positioning cams, and a positioning pin is fixedly connected to the locking main shaft; the two positioning cams are respectively provided with a limit groove and a notch part, and the two notch parts are respectively matched with the limit pins of the two movable doors; the locating pin passes through the limit grooves of the two locating cams at the same time. In the process of synchronous reverse rotation and synchronous reset of the two positioning cams, the positioning pins synchronously move along the limiting grooves of the two positioning cams. The invention does not need to realize the unlocking function through an electromagnet or other electronic elements needing power supply, and solves the problem that the lock loses the automatic unlocking force after the power is off or the power supply is closed in the prior art.

Description

Passive lock for platform door and platform door
Technical Field
The invention relates to a platform door lock, in particular to a passive lock of a platform door and the platform door with the passive lock.
Background
In rail transit, in order to ensure absolute completeness of a train and passengers entering and exiting, and prevent the passengers from jumping a track or falling below a platform due to accidents, a platform door needs to be arranged on the platform.
At present, a door body assembly of the platform door is generally composed of a movable door and a fixed door, and when the platform door is closed, the two movable doors are mutually folded and locked by a locking mechanism to prevent the platform door from being opened under the action of external force; when the door is opened, the locking mechanism can be automatically unlocked, and the two movable doors are separated from each other; in the emergency operation mode, the locking mechanism can be manually opened by platform staff or passengers to realize manual unlocking.
However, the existing automatic unlocking of the locking mechanism is realized by an electromagnet or other electronic elements needing power supply. The application number 201020656124.2 discloses a locking and unlocking device for a rail transit platform screen door, which comprises a lock seat, and a locking mechanism, an electromagnetic unlocking mechanism, a manual unlocking mechanism and a signal generating mechanism which are arranged on the lock seat. The locking mechanical system sets up the leading flank at the lock seat, including the left and right locking piece and the left and right spring bolt that the symmetry set up, control locking piece and control spring bolt rotationally install respectively on the lock seat about, be connected with locking piece reset spring between the locking piece about, be connected with spring bolt reset spring between the left and right spring bolt, form locking and unlocking relation between left locking piece and the left spring bolt, form locking and unlocking relation between right locking piece and the right spring bolt. The locking and unlocking of the movable door are realized by limiting a movable door limiting pin connected with the movable door through a left locking block and a right locking block. When the rail transit shielding door is unlocked and opened, the electromagnetic unlocking bracket is driven to move after the electromagnet is controlled by the controller to drive the lock tongue transmission pin to act, the restriction on the left locking block and the right locking block is released, and the automatic unlocking force is lost after the power is off or the power supply is closed, so that potential safety hazards are left.
Disclosure of Invention
The invention aims to provide a passive lock for a platform door, which does not need to realize the unlocking function by an electromagnet or other electronic elements needing power supply, so as to solve the problem that the lock loses the automatic unlocking force after the power is off or the power supply is closed in the prior art.
In order to achieve the above object, the present invention provides a passive lock for a platform door, comprising a lock base and a locking mechanism mounted on the lock base; the lock seat comprises a frame body formed by surrounding an upper cover plate, a lower cover plate, a left side plate and a right side plate, and a plurality of waist-shaped holes and mounting holes for other components to pass through are formed in the lock seat; the locking mechanism includes:
the left side plate and the right side plate are provided with locking spindle mounting holes, a locking spindle passes through the left side plate and the right side plate of the lock seat through the locking spindle mounting holes, and the locking spindle can axially move along the locking spindle mounting holes; a main shaft reset spring which can provide axial force for the locking main shaft is sleeved on the locking main shaft; a positioning pin is fixedly connected to the locking main shaft;
The fixed shaft is sleeved with a first positioning cam and a second positioning cam which can rotate around the fixed shaft, a positioning cam reset spring is arranged on the fixed shaft and between the two positioning cams, the first positioning cam and the second positioning cam are connected with the positioning cam reset spring, and the first positioning cam and the second positioning cam can synchronously rotate reversely and synchronously reset through the positioning cam reset spring;
The first positioning cam and the second positioning cam are respectively provided with a limiting groove and a notch part, and the two notches are respectively matched with the limiting pins of the two sliding doors; the limiting grooves comprise arc-shaped sections and bending limiting sections, the circle centers of the arc-shaped sections are identical to the fixed shaft, and when the first positioning cam and the second positioning cam rotate along the fixed shaft, the positioning pins can move along the arc-shaped sections of the limiting grooves; the bending limiting section is connected to the end part of the arc-shaped section; the locating pin passes through the limit groove of the first locating cam and the limit groove of the second locating cam simultaneously, and moves along the limit groove of the first locating cam and the limit groove of the second locating cam synchronously in the synchronous reverse rotation and synchronous reset process of the first locating cam and the second locating cam.
In the preferred scheme of the invention, a step is arranged on the locking main shaft, one end of the main shaft reset spring props against the step of the locking main shaft, and the other end props against the lock seat.
Further, the locating pin is fixed on a connecting plate, and the connecting plate is connected with the locking main shaft through bolts, so that the position of the locating pin can be finely adjusted conveniently.
Further, a rubber ring is arranged on the locking main shaft and is positioned between the connecting plate and the lock seat, and the shock absorption effect is achieved in the process that the positioning pin connecting plate moves towards the lock seat.
Further, in order to reduce the space occupied and reduce the size of the passive lock, a waist-shaped hole which is convenient for the positioning pin to move is formed in the upper cover plate of the lock seat, the positioning pin stretches into the waist-shaped hole, and the waist-shaped hole can also play a role in guiding the positioning pin.
In a preferred embodiment of the invention, the fixed shaft is perpendicular to the locking spindle, and the fixed shaft is located at one side of the locking spindle.
In the preferred scheme of the invention, the positions of the limiting grooves on the first positioning cam and the positions of the limiting grooves on the second positioning cam are symmetrical, and the symmetry line is a straight line which is parallel to the axis of the locking main shaft and passes through the center of the positioning pin.
In a preferred embodiment of the present invention, the notch of the first positioning cam and the notch of the second positioning cam are disposed on the same side of the lock base, and extend out of the lock base, the notch of the first positioning cam faces to the right and corresponds to the right moving door limiting pin, and the notch of the second positioning cam faces to the left and corresponds to the left moving door limiting pin.
In the preferred scheme of the invention, the passive lock of the platform door further comprises a manual unlocking linkage component, the manual unlocking linkage component comprises a two-link structure consisting of a transverse link and an inclined link, a waist hole is formed in the locking main shaft, one end of the transverse link is rotatably connected with the lock seat, the other end of the transverse link is rotatably connected with one end of the inclined link, and the other end of the inclined link is connected with the waist hole of the locking main shaft. An upward force is applied to the connecting end of the inclined connecting rod of the transverse connecting rod, the transverse connecting rod rotates around the lock seat, the transverse connecting rod drives one end of the inclined connecting rod to move upwards, and the other end of the inclined connecting rod drives the locking main shaft to move axially through the waist hole.
In a preferred embodiment of the invention, the passive lock of the platform door further comprises a signal generating mechanism, the end part of the locking main shaft is provided with a convex ring, and the signal generating mechanism comprises a travel switch corresponding to the convex ring. Further, the lock seat connecting end of the transverse connecting rod is provided with a swinging arm part, and the signal generating mechanism further comprises a travel switch corresponding to the swinging arm part.
In addition, the application also provides a platform door, the upper part of the door body of the platform door is provided with a door girder, a circulating synchronous belt driven by a motor is arranged on the door girder, a left moving door and a right moving door are hung and arranged on the circulating synchronous belt in a vertically staggered mode, and the bottoms of the left moving door and the right moving door are provided with sliding rail devices which play a role in supporting and guiding; the circulating synchronous belt drives the left and right movable doors to synchronously open or close; the platform door passive lock is arranged in the middle of the door machine beam and is used for locking and unlocking the left and right movable doors, and movable door limiting pins which are matched with the passive lock to realize locking and unlocking are respectively arranged on the left and right movable doors; and a driving piece which is used for driving the circulating synchronous belt to push the locking main shaft of the passive lock to unlock along with the displacement generated by the tensioning of the circulating synchronous belt when the motor is started is further arranged on the circulating synchronous belt.
When the locking is carried out, the two movable door limiting pins respectively enter the notch parts of the two positioning cams along the horizontal direction, the first positioning cam and the second positioning cam are driven to rotate in opposite directions, the positioning pins on the locking main shaft slide along the arc sections of the limiting grooves, and when the positioning pins slide to the connecting positions (transitional positions) of the arc sections and the bending limiting sections; under the action of the main shaft reset spring, the locking main shaft drives the positioning pin to enter the bending limiting section, and the positioning cam is locked and cannot rotate;
When unlocking, the locking main shaft is pushed by external force to move one end distance (the length of the bending limiting section) in the direction of overcoming the main shaft reset spring, the positioning pin on the locking main shaft moves from the bending limiting section of the limiting groove to the connection position (transition position) of the arc-shaped section and the bending limiting section, and under the action of the positioning cam reset spring, the first positioning cam and the second positioning cam simultaneously reversely rotate, and the positioning pin moves along the arc-shaped section of the limiting groove to finish unlocking.
The passive lock of the platform door does not need to realize the unlocking function by an electromagnet or other electronic elements needing power supply, and solves the problem that the lock loses the automatic unlocking force after the power is off or the power supply is closed in the prior art.
The passive lock of the platform door has compact and reasonable structure and high reliability and stability.
The features of the present invention will be apparent from the following detailed description of the preferred embodiments, taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a schematic view of a moving door mounted on a circulating synchronous belt in an embodiment.
Fig. 2 is a schematic view of a passive lock.
Fig. 3 is a schematic view of the lock base.
Fig. 4 is a schematic view of a locking mechanism.
Fig. 5 is a schematic view of the locking spindle installed in the lock base (positioning cam omitted).
FIG. 6 is a schematic diagram of the relationship between the first positioning cam and the second positioning cam.
Fig. 7 is a schematic view showing a position state of the positioning pin in the limit grooves of the two positioning cams.
Fig. 8 is a schematic view showing a state that the positioning pin is at another position of the limiting grooves of the two positioning cams.
Fig. 9 is a schematic diagram of the operation of the passive lock.
Fig. 10 is a schematic diagram of the operation of the passive lock.
Fig. 11 is a schematic diagram of the operation of the passive lock.
Detailed Description
In order that the manner in which the invention is attained, as well as the features and advantages thereof, will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof.
Referring to fig. 1, a platform door is a full-height door or a shielding door, a door beam 10 is provided at an upper portion of a door body, a circulating synchronous belt 11 driven by a motor is mounted on the door beam, a left moving door 12 and a right moving door 12 are suspended and mounted on the circulating synchronous belt 11 in a vertically staggered manner, and slide rail devices (not labeled in the figure) having supporting and guiding functions are provided at bottoms of the left moving door and the right moving door. The motor drives the circulation synchronous belt 11 to move, and the circulation synchronous belt drives the left and right movable doors 12 to synchronously open or close. A passive lock is arranged in the middle position 13 of the door beam and used for locking and unlocking the left and right movable doors, and a movable door limiting pin 14 which is matched with the passive lock to realize locking and unlocking is arranged on each of the left and right movable doors. The driving part is provided with a swing arm (not labeled in the figure), the middle part of the swing arm can be rotated by the swing arm, the upper end of the swing arm is fixedly connected with the circulating synchronous belt, and the lower end of the swing arm corresponds to the left end position of the locking main shaft of the passive lock.
Referring to fig. 2-11, a passive lock includes a lock base 100 and a locking mechanism, a manual unlocking linkage member, and a signal generating mechanism mounted on the lock base;
Referring to fig. 3, the lock base 100 includes a frame body surrounded by an upper cover plate 110, a lower cover plate 120, a left side plate 130 and a right side plate 140, and is provided with a plurality of waist-shaped holes and mounting holes for other components to pass through.
The locking mechanism includes:
Referring to fig. 3, 4 and 5, a locking spindle mounting hole 131 is formed in the left and right side plates, and a locking spindle 200 passes through the left and right side plates (130, 140) of the lock base through the locking spindle mounting hole 131, and the locking spindle 200 can axially move along the locking spindle mounting hole. The locking main shaft is sleeved with a main shaft reset spring 210, a step 211 is arranged on the locking main shaft, one end of the main shaft reset spring 210 props against the step 211 of the locking main shaft, the other end of the main shaft reset spring props against the lock seat, and the main shaft reset spring 210 can provide axial force for the locking main shaft 200. The middle part of the locking main shaft is connected with a connecting plate 220 through a bolt (or welding), and a locating pin 230 is fixed on the connecting plate 220, and the position of the locating pin is convenient to finely adjust by adopting a bolt connection mode. The positioning pin 230 moves in the axial direction of the locking spindle in synchronization with the locking spindle 200.
In order to reduce the occupied space and reduce the size of the passive lock, the upper cover plate 110 of the lock seat is provided with a waist-shaped hole 111 which is convenient for the positioning pin to move, the upper end of the positioning pin 230 extends into the waist-shaped hole, and the waist-shaped hole 111 can also play a role in guiding the positioning pin.
In addition, a rubber ring 240 is sleeved on the locking spindle and is positioned between the connecting plate 220 and the lock base 100, and the rubber ring 240 plays a role in shock absorption during the process that the connecting plate 220 moves towards the lock base 100.
Referring to fig. 6,7 and 8, a fixing shaft 150 is provided between the upper and lower cover plates (110, 120), the fixing shaft 150 being perpendicular to the locking spindle 200, but the fixing shaft 150 is located at one side of the locking spindle 200 (to avoid interference during movement). A first positioning cam 300 and a second positioning cam 400 which can rotate around the fixed shaft are sleeved on the fixed shaft 150, a positioning cam return spring 160 (torsion spring) is arranged on the fixed shaft and between the two positioning cams, spring mounting holes 161 are respectively formed in the two positioning cams, and one end of the positioning cam return spring 160 is connected with the first positioning cam 300 and the other end is connected with the second positioning cam 400 through the spring mounting holes 161; so that the first positioning cam and the second positioning cam can complete the actions of synchronous reverse rotation and synchronous reset.
Limiting grooves (310, 410) and notch parts (320, 420) are respectively arranged on the first positioning cam and the second positioning cam, and the two notch parts are respectively matched with the limiting pins 14 of the two sliding doors. The notch 420 of the first positioning cam 320 and the notch 420 of the second positioning cam are disposed on the same side of the lock base, and extend out of the lock base, the notch 410 of the first positioning cam faces to the right and corresponds to the right moving door limiting pin, and the notch 420 of the second positioning cam faces to the left and corresponds to the left moving door limiting pin.
Since the rotation directions of the first positioning cam 300 and the second positioning cam 400 are opposite, the positions of the limit grooves 310 on the first positioning cam distributed on the first positioning cam and the positions of the limit grooves 410 on the second positioning cam distributed on the second positioning cam are symmetrically structured, and the symmetry line is a straight line parallel to the axis of the locking spindle and passing through the center of the positioning pin.
The two limiting grooves comprise an arc-shaped section a and a bending limiting section b, the circle center of the arc-shaped section a is identical to that of the fixed shaft, and the bending limiting section b is connected to the end part of the arc-shaped section a. The positioning pin 230 passes through both the limiting groove 310 of the first positioning cam and the limiting groove 410 of the second positioning cam.
In the process of synchronously rotating in opposite directions and synchronously resetting the first positioning cam 300 and the second positioning cam 400, the positioning pins move along the limiting grooves of the first positioning cam and the limiting grooves of the second positioning cam at the same time, referring to fig. 5, when the positioning pins 230 are located at the bending limiting sections b of the limiting grooves 310 and 410 at the same time, at this time, the first positioning cam 300 and the second positioning cam 400 are subjected to the torsion force of the positioning cam return spring 160, but under the blocking limiting action of the positioning pins 230, the first positioning cam 300 and the second positioning cam 400 cannot rotate, so that the moving door limiting pins 14 on the left moving door and the right moving door are locked in the two notch parts (320 and 420). When unlocking is needed, the locking main shaft 200 is pushed to move rightwards by external force, the positioning pin 230 is driven to move rightwards along the bending limiting section b, and enters the transition position of the bending limiting section b and the arc section a (shown in fig. 6), at this time, because the circle center of the arc section is the same as that of the fixed shaft, the positioning pin can move along the arc section a, the locking of the positioning pin to the positioning cam is released, the first positioning cam 300 and the second positioning cam 400 are released by the torsion of the positioning cam return spring 160, the first positioning cam 300 is driven to rotate clockwise, the second positioning cam 400 rotates anticlockwise, the corresponding notch parts (320 and 420) are rotated to the outside, and the moving door limiting pins 14 on the left moving door and the right moving door can be moved out from the notch parts (320 and 420) to the outside respectively, so that the purpose of unlocking the moving door is realized.
Referring again to fig. 2, the passive lock of the platform door further comprises a signal generating mechanism comprising a travel switch 610 corresponding to the collar 260, provided with the collar 260 at the end of the locking spindle. When the locking spindle 200 moves leftwards until the positioning pin 230 slides into the bending limiting section b (the moving door is closed and locked), the convex ring 260 presses the travel switch 610, and the travel switch 610 sends a door closing locking signal to the control unit. When the external force drives the locking spindle 200 to move rightward until the positioning pin 230 slides into the arc section a (the moving door can be opened), the convex ring is separated from the travel switch 610, the travel switch 610 is reset, and an unlocking signal is sent to the control unit. The convex ring 260 and the travel switch 610 are divided into two groups, which play a redundant role.
The passive lock of the platform door further comprises a manual unlocking linkage component, the manual unlocking linkage component comprises a two-link structure consisting of a transverse link 510 and an inclined link 520, a waist hole 250 is formed in the locking main shaft 200, one end of the transverse link 510 is rotatably connected with the lock base 100, the other end of the transverse link 510 is rotatably connected with one end of the inclined link 520, and the other end of the inclined link 520 is connected with the waist hole 250 of the locking main shaft. An upward force is applied to the connecting end of the inclined connecting rod of the transverse connecting rod, the transverse connecting rod rotates around the lock seat, the transverse connecting rod drives one end of the inclined connecting rod to move upwards, and the other end of the inclined connecting rod drives the locking spindle 200 to move axially (rightward) through the waist hole 250.
In addition, a swing arm 511 is provided at the lock base connection end of the cross link 510, and a travel switch (not shown) corresponding to the swing arm is also provided on the right side of the swing arm 511, and is mounted on the fixing plate 170. When the manual unlocking is performed, the left end of the transverse connecting rod moves upwards, the swing arm 511 swings right around the lock seat, the manual unlocking travel switch is pressed, and the manual unlocking travel switch sends a manual unlocking signal to the control unit.
The working principle of the invention is as follows:
because the two positioning cams rotate synchronously and reversely, one positioning cam is taken as an example.
Referring to fig. 9, when the circulating synchronous belt drives the movable door to close, the movable door limiting pin 14 moves from right to left and enters the notch part of the positioning cam, and as the movable door moves, the movable door limiting pin 14 drives the positioning cam to rotate clockwise, in the process, the state of the main shaft return spring 210 is unchanged and is always in a compressed state, the positioning cam return spring is changed from a free state to a compressed state, and the compression amount is gradually increased; when the positioning pin 230 moves along the arc-shaped section a and the positioning pin 230 moves to a transition position with the bending limiting section b (as shown in fig. 10), at this time, the direction of the bending limiting section b is just parallel to the axial direction of the locking spindle, the spindle return spring 210 is released, the elastic force of the spindle return spring pushes the positioning pin 230 to move along the bending limiting section b, and referring to fig. 11, the positioning cam is subjected to torsion of the positioning cam return spring 160, but the positioning cam cannot rotate under the blocking limiting action of the positioning pin 230. At this point, the moving door is closed in place and locked by the passive lock.
When unlocking, before the motor starts to drive the circulating synchronous belt to rotate, the circulating synchronous belt can be tensioned first, the process can enable the circulating synchronous belt to generate smaller displacement, the upper end of the circulating synchronous belt is fixedly connected with the circulating synchronous belt to rotate, the lower end of the swinging arm pushes the locking main shaft to move leftwards, in the process, the main shaft reset spring 210 starts to be compressed, the locating pin 230 on the locking main shaft moves from the bending limit section b of the limit groove to the transition position of the arc section and the bending limit section (the locating pin moves from the position of fig. 11 to the position of fig. 10), the locating pin can move along the arc section a due to the fact that the circle center of the arc section is the same as the fixed shaft, the locking of the locating pin to the locating cam is released, the torsion of the locating cam reset spring 160 is released to drive the first locating cam 300 to rotate clockwise, the second locating cam 400 rotates anticlockwise, the corresponding notch parts (320 and 420) are rotated to the outer sides (the state of fig. 10 is changed to the state of fig. 9), and the moving door limit pins 14 on the left and the right moving door can move outwards from the notch parts (320 and 420).
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (11)

1. A passive lock for a platform door, characterized by: comprises a lock seat and a locking mechanism arranged on the lock seat; the lock seat comprises a frame body formed by surrounding an upper cover plate, a lower cover plate, a left side plate and a right side plate, and a plurality of waist-shaped holes and mounting holes are formed in the lock seat; the locking mechanism includes:
the left side plate and the right side plate are provided with locking spindle mounting holes, a locking spindle passes through the left side plate and the right side plate of the lock seat through the locking spindle mounting holes, and the locking spindle can axially move along the locking spindle mounting holes; a main shaft reset spring which can provide axial force for the locking main shaft is sleeved on the locking main shaft; a positioning pin is fixedly connected to the locking main shaft;
The fixed shaft is sleeved with a first positioning cam and a second positioning cam which can rotate around the fixed shaft, a positioning cam reset spring is arranged on the fixed shaft and between the two positioning cams, the first positioning cam and the second positioning cam are connected with the positioning cam reset spring, and the first positioning cam and the second positioning cam can synchronously rotate reversely and synchronously reset through the positioning cam reset spring;
The first positioning cam and the second positioning cam are respectively provided with a limiting groove and a notch part, and the two notches are respectively matched with the limiting pins of the two sliding doors; the limiting grooves comprise arc-shaped sections and bending limiting sections, and the circle centers of the arc-shaped sections are identical to the fixed shaft; the bending limiting section is connected to the end part of the arc-shaped section; the locating pin passes through the limit groove of the first locating cam and the limit groove of the second locating cam simultaneously, and moves along the limit groove of the first locating cam and the limit groove of the second locating cam synchronously in the synchronous reverse rotation and synchronous reset process of the first locating cam and the second locating cam.
2. A passive lock for a platform door according to claim 1, wherein: the locating pin is fixed on a connecting plate, and the connecting plate is connected with the locking main shaft through bolts.
3. A passive lock for a platform door according to claim 2, wherein: a rubber ring is arranged on the locking main shaft and is positioned between the connecting plate and the lock seat.
4. A passive lock for a platform door according to claim 1, wherein: the upper cover plate of the lock seat is provided with a waist-shaped hole which is convenient for the locating pin to move, and the locating pin stretches into the waist-shaped hole.
5. A passive lock for a platform door according to claim 1, wherein: the fixed axle is perpendicular with the locking main shaft, and the fixed axle is located one side of locking main shaft.
6. A passive lock for a platform door according to claim 1, wherein: the positions of the limiting grooves on the first positioning cam and the positions of the limiting grooves on the second positioning cam are symmetrical, and the symmetry line is a straight line which is parallel to the axis of the locking main shaft and passes through the center of the positioning pin.
7. A passive lock for a platform door according to claim 1, wherein: the notch parts of the first positioning cam and the second positioning cam are arranged on the same side of the lock seat and extend out of the lock seat, the notch part of the first positioning cam faces to the right and corresponds to the right moving door limiting pin, and the notch part of the second positioning cam faces to the left and corresponds to the left moving door limiting pin.
8. A passive lock for a platform door according to claim 1, wherein: the manual unlocking linkage component comprises a two-connecting-rod structure consisting of a transverse connecting rod and an inclined connecting rod, a waist hole is formed in the locking main shaft, one end of the transverse connecting rod is rotatably connected with the lock seat, the other end of the transverse connecting rod is rotatably connected with one end of the inclined connecting rod, and the other end of the inclined connecting rod is connected with the waist hole of the locking main shaft.
9. A passive lock for a platform door according to claim 1, wherein: the passive lock of the platform door further comprises a signal generating mechanism, a convex ring is arranged at the end part of the locking main shaft, and the signal generating mechanism comprises a travel switch corresponding to the convex ring.
10. A platform door, characterized by: the upper part of the device is provided with a door machine beam, a circulating synchronous belt driven by a motor is arranged on the door machine beam, a left moving door and a right moving door are hung and arranged on the circulating synchronous belt in a vertically staggered mode, and the bottoms of the left moving door and the right moving door are provided with sliding rail devices which play a supporting and guiding role; the circulating synchronous belt drives the left and right movable doors to synchronously open or close; a platform door passive lock as claimed in any one of claims 1-9 is installed in the middle of a door machine beam, and a moving door limiting pin matched with the passive lock to realize locking and unlocking is arranged on each of the left moving door and the right moving door.
11. A platform door according to claim 10, wherein: and a driving piece which is used for driving the circulating synchronous belt to push the locking main shaft of the passive lock to unlock along with the displacement generated by the tensioning of the circulating synchronous belt when the motor is started is further arranged on the circulating synchronous belt.
CN201910525426.1A 2019-06-18 2019-06-18 Passive lock for platform door and platform door Active CN110295804B (en)

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