CN116427793A

CN116427793A - Locking device for platform sliding door

Info

Publication number: CN116427793A
Application number: CN202310596002.0A
Authority: CN
Inventors: 赵五喜; 张超
Original assignee: Beijing Pavilion Profit Technology Co ltd
Current assignee: Beijing Pavilion Profit Technology Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-07-14

Abstract

The invention also discloses a locking device for a platform sliding door, comprising: the device comprises a mounting seat, two lock bolts, an unlocking mechanism and two locking mechanisms; the unlocking mechanism comprises an electromagnet, a driving block and two crank connecting rods; the locking mechanism comprises two locking plates, a transmission locking rod and a lock body, wherein the lock body comprises a rotary locking plate, the end part of the locking tongue is inserted into the lock body and can push the rotary locking plate to rotate and be locked with the rotary locking plate, the rotary locking plate rotates to enable the transmission locking rod to move downwards, and the locking plate is locked with the transmission locking rod at a locking position under the action of the reset force of the unlocking mechanism; the unlocking is that the electromagnet is electrified to drive the driving block to move upwards, the crank connecting rod drives the locking plate to separate from the locking position of the transmission locking rod, and meanwhile, the lock tongue can separate from the rotary locking plate, so that the unlocking of the sliding door is realized. The invention has reasonable structural design and good reliability and stability.

Description

Locking device for platform sliding door

Technical Field

The invention relates to a locking device for a platform sliding door, and belongs to the technical field of urban rail transit.

Background

The existing electric locking devices of all-height platform doors for rail transit platform door systems or rapid transit platform door systems mostly adopt electromagnet-driven locking pins to move, and the locking pins and locking blocks arranged on sliding doors are combined into locking relation; when the door is closed, before the sliding door of the full-height platform door is closed in place, the electromagnet drives the lock pin to move, so that the sliding door is closed in place conveniently; after the sliding door of the full-height platform door is closed in place, the electromagnet drives the lock pin to move again, and the lock pin locks the lock catch, so that the sliding door of the full-height platform door is in a locking state. The working units and the triggering mechanisms of the electric locking device are independent, and the electromagnet is in a working state when the door is opened or closed, so that the electric locking device has higher installation precision requirement, is inconvenient to adjust, is difficult to adapt to wind load and other conditions, causes inconvenient opening or closing of the sliding door of the full-height platform door when the position of the sliding door is changed, and has low reliability.

CN 106013991B discloses an electric locking device for a full-height platform door, which adopts an electromagnet assembly or other driving assemblies to drive a lock plate to move, the lock plate and a lock pin arranged on a sliding door are combined to form a working state, and when the door is opened, the electromagnet drives the lock plate to move, so that the lock pin is unlocked, and the sliding door is in an openable state; when the door is closed, the lock pin pushes the lock plate to move under the action of the door closing force in the door closing process of the sliding door, and after the sliding door is closed in place, the lock pin is locked by the lock plate, so that the sliding door is in a locking state; the door opening device has the advantages that the structure is simple, the electromagnet assembly is in a working state only when the door is opened, the installation and adjustment are convenient, the adaptability is adjustable, and the cost is low. However, the following disadvantages exist: 1) The locking is only by the locking plate.

CN 101666189B discloses a locking device for a track traffic shielding door, which comprises a lock seat, a locking mechanism, an electromagnetic unlocking mechanism, a moving unlocking mechanism and a signal generating mechanism, wherein the locking mechanism, the electromagnetic unlocking mechanism, the moving unlocking mechanism and the signal generating mechanism 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 sliding door is locked and unlocked by limiting a sliding door limiting pin connected with the sliding door through left and right locking blocks. The defects are that: 1. the reset of the left locking piece, the right locking piece and the left locking bolt adopts a reset spring, and the reset spring is in a stretched state under the closing state of the vehicle door, so that the spring is easy to fatigue failure due to long-time stretching. Meanwhile, the fatigue degree of the lock block reset spring is inconsistent with that of the lock tongue reset spring, so that the lock block and the lock tongue are not synchronously reset, and the lock block is caused. 2. The clearance between the locking piece and the limiting pin of the sliding door is high in requirement, and the clearance is too large or too small, so that blocking can be possibly caused. 3. The clearance requirement of the fit between the locking piece and the lock tongue is high, and the blocking is easy to generate. In conclusion, the bending groove of the locking block for locking the sliding door opening pin is high in processing difficulty, high in precision is required, the locking hook of the lock tongue locked with the lower arm of the locking block also needs to be matched well to be unlocked and locked smoothly, and the reset spring is in a stretched state for a long time and is easy to fatigue failure.

Therefore, a reasonable-structure rail transit platform door locking device which does not cause blocking of locking parts and does not cause fatigue damage of a return spring in a stretched state for a long time is a target pursued by those skilled in the art.

Disclosure of Invention

The invention aims to solve the problems that the prior rail transit platform door locking device has unreasonable structural design and high precision of locking pieces, and the reset spring of the locking pieces is in an open state for a long time, so that the fatigue failure of the locking pieces is caused.

In order to achieve the above purpose, the technical scheme of the invention is as follows: a locking device for a platform sliding door, comprising: the installation seat is symmetrically provided with lock bolts on the two sliding doors respectively, an unlocking mechanism positioned in the central position of the installation seat and two locking mechanisms symmetrically arranged on two sides of the unlocking mechanism;

the unlocking mechanism comprises: the electromagnet for electric unlocking is arranged at the lower part of the central position of the mounting seat; the driving block is sleeved on the push rod of the electromagnet; the two crank connecting rods are symmetrically arranged at two sides of the push rod; the crank connecting rod comprises a first arm and a second arm which are arranged in a V shape, and the joint of the first arm and the second arm is arranged on the mounting seat through a hinge shaft; the driving block is movably connected with the first arm and is used for driving the crank connecting rod to rotate;

the locking mechanism comprises two locking plates which are horizontally and symmetrically arranged on two sides of the push rod, and the second arm end part of the crank connecting rod is movably connected with one end of the locking plate and used for driving the locking plate to switch between a locking position and an unlocking position; the two transmission lock rods are vertically and symmetrically arranged at two sides of the push rod, and are rod-shaped; the locking plate is locked with the transmission locking rod through a locking structure, when the locking plate is positioned at a locking position, the transmission locking rod can be stopped from moving upwards, and when the locking plate is positioned at an unlocking position, the restriction on the upward movement of the transmission locking rod is released; the two lock bodies are symmetrically arranged on two sides of the push rod and are positioned right below the transmission lock rod; the top of the lock body is opened for the lower ends of the transmission lock rods to extend in, and the outer side surfaces of the two lock bodies are provided with lock holes for the lock bolts to be inserted in;

the lock tongue is in a strip plate shape, and the end part of the lock tongue is inserted into the lock body from the lock hole and locked with the lock body, and drives the transmission lock rod to move up and down, so that the lock plate and the transmission lock rod are switched between a locking position and an unlocking position.

As a preferred embodiment, wherein: the driving block is movably connected with the first arm: the central position of the driving block is provided with a waist-shaped long hole which is horizontally arranged; the free end of the first arm is provided with a first sliding pin, and the first sliding pins of the two crank connecting rods respectively extend into two sides of the long hole of the driving block;

the second arm end part is movably connected with one end of the lock plate: the free end of the second arm is provided with a kidney-shaped sliding hole; one end of the lock plate is provided with a second sliding pin, the second sliding pin is matched with a sliding hole on a second arm of the crank connecting rod, and the second sliding pin is inserted into the sliding hole;

the locking structure comprises: the locking rod locking part is positioned on the transmission locking rod and is locked with the locking plate, and the locking rod stopping part is stopped by the locking plate; the lock plate is provided with a first U-shaped opening facing one side of the transmission lock rod, and the bottom of the first U-shaped opening is provided with a second U-shaped opening; the opening width of the second U-shaped opening is smaller than that of the first U-shaped opening; the diameter of the locking part of the lock rod is smaller than that of the stop part of the lock rod; the width of the second U-shaped opening is larger than the diameter of the locking part of the locking rod and smaller than the diameter of the stopping part of the locking rod, and the diameter of the stopping part of the locking rod is matched with the diameter of the first U-shaped opening.

As a preferred embodiment, wherein: the lock body comprises a square shell, and a rotary lock plate is arranged in the shell through a rotating shaft; the two rotary locking plates are symmetrically arranged left and right; the circumference of the rotary locking plate is provided with a protruding part, and a concave part which is adjacent to the protruding part and is arranged at one side facing the electromagnet; a protruding lock tooth is arranged on one side opposite to the concave part of the rotary lock plate, and a U-shaped groove is arranged on one side, facing the center of the electromagnet, of the adjacent lock tooth; the top surface of the shell of the lock body is open and the lower end of the transmission lock rod extends in;

the outer side surface of the shell of the lock body is provided with a lock hole for inserting the lock tongue, the front end of the lock tongue is provided with a pushing cross rod which is embedded into the groove and used for pushing the rotary lock plate to rotate, and the rear of the pushing cross rod is provided with a square lock hole for inserting lock teeth;

when the lock tongue is inserted, the lock teeth are inserted into the square lock holes, the concave parts rotate to the lower part of the transmission lock rod, and the transmission lock rod is in a locking state; when the lock tongue is pulled out, the lock teeth are separated from the square lock holes, the protruding parts rotate to the lower part of the transmission lock rod, and the transmission lock rod is in an unlocking state.

As a preferred embodiment, wherein: further, an upper guide plate and a lower guide plate which are fixed on the mounting seat and are arranged in parallel are arranged above and below the lock plate, and a horizontal chute for guiding the lock plate is formed between the upper guide plate and the lower guide plate.

As a preferred embodiment, wherein: further, a guide shaft sleeve fixedly arranged on the mounting seat is arranged outside the transmission lock rod to provide vertical movement guide for the transmission lock rod; the transmission lock rod is provided with a stop ring for limiting the transmission lock rod to fall to a locking position.

As a preferred embodiment, wherein: the center line of the groove is arranged in a direction offset by an acute angle alpha with the radius of the rotary locking plate, and the acute angle alpha is 15-30 degrees.

As a preferred embodiment, wherein: the mounting seat is box-shaped, and a cover plate is arranged in front of the mounting seat.

As a preferred embodiment, wherein: a first travel switch is arranged above the push rod of the electromagnet, and a second travel switch and a third travel switch are arranged above the transmission lock rods on the left side and the right side; the push rod is provided with a first triggering part which extends upwards and is used for triggering the first travel switch, and the locking part of the lock rod of the transmission lock rod is provided with a second triggering part which extends upwards.

When the door is closed and locked, the two lock bolts move in opposite directions, the push cross rod at the front end of the lock bolt enters the groove of the rotary lock plate to push the rotary lock plate to rotate, the rotary lock plate at the left side rotates anticlockwise, the rotary lock plate at the right side rotates clockwise, and the lock teeth at the rear of the groove are just inserted into the square lock holes of the lock bolts; meanwhile, the rotary lock plate rotates, so that the protruding part of the rotary lock plate is separated from the lower end of the transmission lock rod due to rotation, the concave part of the rotary lock plate rotates to the lower end of the transmission lock rod, the transmission lock rod falls into the concave part under the action of the return spring, and at the moment, the lock rod stop part of the transmission lock rod is stopped by the second U-shaped opening of the lock plate and cannot move upwards, so that the transmission lock rod is kept at the concave part of the rotary lock plate and the lock teeth are kept at the locking position of the square lock hole; the lock plate drives the lock rod stop to realize as follows: under the action of the reset force, the push rod of the electromagnet moves downwards, the push rod drives the left crank connecting rod to rotate clockwise through the driving block to drive the right crank connecting rod to rotate anticlockwise, and the crank connecting rod drives the locking plates on the left side and the right side to move leftwards and rightwards respectively, so that the second U-shaped opening is embedded with the locking rod locking part, the width of the second U-shaped opening is smaller than the diameter of the locking rod stopping part, and therefore the locking rod stopping part can be limited to move upwards, namely the locking plates can keep the transmission locking rod in the position, and the door can be prevented from being opened due to the fact that the locking plates are driven by accident (manual door pulling) to move to realize door closing and locking.

When the sliding door is unlocked, the electromagnet of the unlocking mechanism is electrically conducted, the iron core moves upwards to drive the push rod to move upwards, and then the crank connecting rod on the left side is driven to rotate anticlockwise to drive the crank connecting rod on the right side to rotate clockwise, and the crank connecting rod drives the lock plates on the left side and the right side to move towards the middle respectively, so that the second U-shaped opening is separated from the locking part of the lock rod, and the second U-shaped opening releases the limit of the stop part of the lock rod; simultaneously, the spring bolt moves to both sides under the drive of sliding door, and the rotation locking plate that is arranged in the recess of rotation locking plate drive left side rotates along the pointer, the rotation locking plate on right side anticlockwise rotates, and the lock tooth deviate from in the square lockhole of spring bolt, and under the drive of rotation locking plate, the bulge of rotation locking plate just changes to the transmission locking lever below, jack up the transmission locking lever, accomplishes the unblock.

The corresponding electromagnet and the two transmission lock bars are provided with travel switches, when the lock is unlocked, a first trigger part at the top end of a push rod of the electromagnet 31 triggers the first travel switch, the rotary lock plate jacks up the transmission lock bar, and a second trigger part at the top end of the transmission lock bar triggers the second travel switch and the third travel switch respectively; all three travel switches are triggered, indicating that the door has been opened. When the door is locked, the push rod of the electromagnet falls back under the action of the reset force, the first travel switch is released, the transmission lock rod falls back, the second travel switch and the third travel switch are released, and when the three travel switches are released, the door is locked. The beneficial effects are as follows: through the action of the three travel switches, the detection and confirmation lock tongue is inserted in place, the door body is indirectly confirmed to be closed in place and locked, and the fault point position can be rapidly determined when the lock breaks down.

According to the technical scheme, the unlocking mechanism is arranged at the central position, the locking mechanisms are symmetrically arranged at the two sides of the unlocking mechanism, the unlocking mechanism drives the two symmetrically-arranged crank connecting rods through the driving block, the locking plate of the locking mechanism is further driven to switch between the locking position and the unlocking position, meanwhile, the strip-shaped lock tongue is inserted into the lock body, and the driving lock tongue is driven to move up and down, so that locking and unlocking are realized, the problem that spring fatigue is caused in the unlocking mechanism in the prior art no matter in the unlocking and locking states is solved, and therefore the problem that parts in the locking mechanism in the prior art are easy to fatigue failure is effectively solved.

Further, the locking device for the platform sliding door of the invention, wherein the locking structure between the locking plate and the transmission locking rod is that the transmission locking rod is designed into two parts with a small upper part and a big lower part: the locking plate matched with the locking rod is provided with a first U-shaped opening and a second U-shaped opening; the second U-shaped opening width is larger than the locking part diameter of the lock rod and smaller than the stopping part diameter of the lock rod, and the first U-shaped opening width is larger than the stopping part diameter of the lock rod, so that the lock plate can lock and unlock the lock rod through linear motion, namely, the lock rod and the lock plate move linearly, and therefore, the two locking pieces can easily achieve manufacturing precision, and the problems of precision influence and blockage are not caused by difficult processing.

Further, the locking device for the platform sliding door is characterized in that the lock body is a rotary lock plate, the rotary lock plate is provided with a protruding part and a recessed part, meanwhile, the rotary lock plate is provided with a groove for inserting a lock tongue and a lock tooth which can be inserted into the tongue, the rotary lock plate is pushed by the lock tongue, so that the protruding part and the recessed part of the lock body can be respectively rotated below the transmission lock rod, the transmission lock rod can be jacked and fallen, the transmission lock rod is in an unlocking state when jacked, and the transmission lock rod falls to the recessed part to be in a locking state. The transmission lock rod is switched between locking and unlocking through the variable-diameter rotary lock plate, so that the transmission lock rod is high in reliability and accurate in transmission, and the phenomenon of blocking cannot occur.

Further, the locking device for the platform sliding door is characterized in that a first travel switch is arranged above the push rod of the electromagnet, and a second travel switch and a third travel switch are arranged above the transmission lock rods on the left side and the right side; the double-group travel switch is used for respectively detecting the actions of the left and right side transmission lock rods, can respectively determine the states (insertion and extraction) of the lock bolts at the two sides to indirectly confirm the switch states of the two doors, accurately feeds back the real-time state information of the lock bolts at the two sides to the outside through the actions of the travel switch, and provides more information for a control system.

The locking device can feed back respective door closing in-place signals and locking signals of two doors, and when one door is locked, for example: the right side sliding door is closed in place, the right side transmission lock rod falls to the locking state position, namely inserts in the concave part of the rotary lock plate, however, because the left side door is not closed in place, the left side transmission lock rod is still in the unlocking state position at this moment, namely still above the convex part of the rotary lock plate, at this moment, the left side crank connecting rod cannot rotate clockwise to enter the locking position, so that the push rod of the electromagnet cannot fall, and meanwhile, the right side crank connecting rod cannot rotate anticlockwise to enter the locking position, at this moment, the left side door can be clearly judged to be not closed because the left side second travel switch is not released. Therefore, the locking device can realize that the locking mechanism of the single door which is closed in place cannot be locked, and the locking mechanism can only act to lock after both doors are closed in place, so that the doors cannot be opened again, and the two doors can be opened only after the electromagnet acts to push the locking mechanism again.

In conclusion, the locking device for the platform sliding door has the advantages of small size, strong adaptability, simple and compact structure, more feedback information, high reliability and convenience in maintenance and replacement.

Drawings

FIG. 1 is a schematic view of a locking device for a platform sliding door according to the present invention;

FIGS. 2 and 3 are perspective and front views of a locking apparatus for a platform sliding door according to the present invention with an end cap removed and a left side lock housing removed;

FIG. 4 is a perspective view of a mount according to the present invention;

FIG. 5 is a perspective view of a locking apparatus for a platform sliding door according to the present invention with the mount removed and the left side lock housing removed;

fig. 6, 7, 8 and 9 are perspective, front, top and side views of an unlocking mechanism and locking structure of a locking device for a platform sliding door according to the present invention;

FIGS. 10 and 11 are schematic views showing a locking apparatus for a sliding door of a platform according to the present invention in a locked state and an unlocked state;

FIG. 12 is a front view of a pivoting locking tab of a locking device for a platform sliding door according to the present invention;

FIG. 13 is a perspective view of a locking tongue of a locking device for a platform sliding door according to the present invention;

FIG. 14 is a perspective view of a locking plate of a locking device for a platform sliding door according to the present invention;

fig. 15 is a perspective view of a crank link of a locking device for a platform sliding door according to the present invention.

Reference numerals illustrate: mounting base 11, extension 111, cover plate 12; the lock tongue 2 pushes the cross rod 21, the square lock hole 22 and the side push rod 23; the unlocking mechanism 3, the electromagnet 31, the push rod 311 and the first triggering part 312; a driving block 32, a long hole 321; a crank link 33, a first arm 331, a second arm 332, a first slide pin 333, a slide hole 334, and a hinge shaft 335; an elastic card 34; a locking mechanism 4, a locking plate 41, a second slide pin 411, a first U-shaped opening 413, a second U-shaped opening 414; a transmission lock lever 42, a lock lever locking part 421, a lock lever stopping part 422, and a second triggering part 423; lock body 43, housing 430, lock hole 4301; the rotary lock plate 431, the protruding part 4311, the concave part 4312, the lock tooth 4313, the groove 4314, the second lock tooth 4313', and the second groove 4314'; a rotating shaft 432; upper guide plate 441, lower guide plate 442, chute 443; a guide sleeve 45; a stop ring 46; a first travel switch 51, a second travel switch 52, and a third travel switch 53.

Detailed Description

The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the preferred embodiments should not be used to limit the scope of the present invention.

Referring to fig. 1-15, there is shown a locking device for a platform sliding door according to the present invention, comprising:

referring to fig. 1 to 4, a mounting base 11 is provided, the mounting base 11 having a substantially rectangular box shape, the mounting base having a downwardly extending projection 111 at a central lower portion thereof, and a cover plate 12 provided at a front face of the mounting base 11; the mounting 11 and cover 12 define a cavity for receiving the various components.

Referring to fig. 13, two bolts 2 are symmetrically arranged on the sliding door, the two bolts 2 are in a strip shape, the front end of each bolt 2 is provided with a pushing cross rod 21, a square lock hole 22 is arranged behind the pushing cross rod, two ends of each pushing cross rod 21 are provided with side push rods 23 which extend forwards and are arranged in parallel, the outer sides of the side push rods 23 are contracted towards the center, and the side push rods 23 facilitate the bolts 2 to enter a lock body 43 (described in detail later);

an unlocking mechanism 3 for electric unlocking, said unlocking mechanism 3 comprising:

an electromagnet 31 provided at the center of the mount 11, the lower portion of the electromagnet extending into the protruding portion 111 of the mount 11;

a driving block 32 provided on the push rod 311 of the electromagnet 31, specifically, the driving block 32 is fixed on the push rod 311 by two elastic cards 34; a waist-shaped long hole 321 which is horizontal and symmetrically arranged with a central line is arranged at the central position of the driving block 32, and the direction of the long hole 321 is the front-back direction;

two crank connecting rods 33 symmetrically arranged on both sides of the push rod 311; the crank connecting rod 33 comprises a first arm 331 and a second arm 332, the upper ends of the first arm 331 and the second arm 332 are connected into a whole to form a V-shaped structure, the connecting part of the first arm 331 and the second arm 332 is arranged on the mounting seat 11 through a hinge shaft 335, and the hinge shaft 335 can be directly formed in the mounting seat 11; the driving block 32 is movably connected with the first arm 331 and is used for driving the crank connecting rod 33 to rotate; specifically, the free end of the first arm 331 has a first sliding pin 333, the first sliding pins 333 of the two crank links 33 extend into both sides of the long hole 321 of the driving block 32, respectively, and the crank links 33 rotate about the hinge shaft 335 under the driving of the driving block 32; the free end of the second arm 332 is provided with a kidney-shaped sliding hole 334;

the two sides of the unlocking mechanism 3 are symmetrically provided with locking mechanisms 4,

the locking mechanism 4 comprises two locking plates 41, the two locking plates 41 are symmetrically arranged on two sides of the push rod 311, and the end part of the second arm 332 of the crank connecting rod 33 is movably connected with one end of the locking plate 41 and is used for driving the locking plate 41 to switch between a locking position and an unlocking position; specifically, one end of the lock plate 41, that is, the inner end facing the electromagnet, has a second sliding pin 411, the second sliding pin 411 is matched with the sliding hole 334 on the second arm 332 of the crank link 33, and the second sliding pin 411 is inserted into the sliding hole 334, and drives the two lock plates 41 to horizontally move left and right or relatively during the rotation of the two crank links 33;

the locking mechanism 4 further comprises two transmission locking bars 42 which are vertically and symmetrically arranged at two sides of the push rod 311, the transmission locking bars 42 are in a rod shape, and comprise a locking bar locking part 421 at the upper part and a locking bar stopping part 422 at the lower part, the locking plate 41 is locked with the transmission locking bars 42 through a locking structure, when the locking plate 41 is positioned at a locking position, the transmission locking bars 42 can be stopped from moving upwards, and when the locking plate 41 is positioned at an unlocking position, the restriction on the upward movement of the transmission locking bars 42 is released;

specifically, the locking structure comprises: a lock lever locking portion 421 located on the transmission lock lever 42 and a lock lever stopper portion 422 stopped by the lock plate 41; a first U-shaped opening 413 provided on the lock plate 41 toward the outside (i.e., toward the transmission lock lever 42) and a second U-shaped opening 414 provided at the bottom of the first U-shaped opening 413, the second U-shaped opening 414 having an opening width smaller than that of the first U-shaped opening 413; the diameter of the locking part 421 is smaller than that of the locking part 422; the diameter of the locking bar locking part 421 is matched with the width of the second U-shaped opening 414 of the locking plate 41, and the width of the second U-shaped opening 414 is smaller than the diameter of the locking bar stopping part 422, namely, the second U-shaped opening 414 allows the locking bar locking part 421 to pass through and limits the locking bar stopping part 422 to pass through, the diameter of the locking bar stopping part 422 is matched with the diameter of the first U-shaped opening 413, and the first U-shaped opening 413 allows the locking bar stopping part 422 to pass through; when the two crank links 33 rotate towards the center (i.e. the left crank link rotates anticlockwise and the right crank link rotates clockwise), the two lock plates 41 are driven to move towards the center (move towards each other), the second U-shaped opening 414 is separated from the lock rod locking part 421, the transmission lock rod 42 can move upwards, when the two crank links 33 rotate towards both sides, the two lock plates 41 are driven to move towards both sides (move away from each other), the second U-shaped opening 414 is engaged with the lock rod locking part 421, and the second U-shaped opening 414 limits the upward movement of the transmission lock rod 42;

the locking mechanism 4 also comprises two lock bodies 43 which are symmetrically arranged at two sides of the push rod 311 of the electromagnet 31 and are positioned right below the transmission lock rod 42;

the lock body 43 comprises a square shell 430, the top of the shell 430 of the lock body 43 is open for the lower ends of the transmission lock rods 42, the outer side surfaces of the shells 430 of the two lock bodies 43 are provided with lock holes 4301 for inserting the lock bolts 2, the end self-locking holes 4301 of the lock bolts 2 are inserted into the lock body 43 and locked with the lock body 43, and the transmission lock rods 42 can be driven to move up and down so as to enable the lock plates 41 and the transmission lock rods 42 to be switched between a locking position and an unlocking position; specifically, two rotary lock pieces 431 are symmetrically arranged right under the transmission lock lever 42, and the rotary lock pieces 431 are rotatably fixed in the housing 430 through a rotation shaft 432; the rotary lock plate 431 has a protruding part 4311, and a recess 4312 for locking is provided adjacent to the protruding part 4311 on the side facing the center of the electromagnet; a protruding locking tooth 4313 is arranged on the side opposite to the concave part 4312 of the rotary locking plate 431, a U-shaped groove 4314 is arranged on the side, facing the electromagnet, of the adjacent locking tooth 4313, the groove 4314 is used for receiving the insertion of the locking bolt 2, the locking tooth 4313 is inserted into the square locking hole 22 of the locking bolt 2 by pushing the rotary locking plate 431 for a second time to rotate, meanwhile, when the locking bolt 2 is inserted, the rotary locking plate 431 on the right side rotates clockwise, the rotary locking plate 431 on the left side rotates anticlockwise, so that the concave part 4312 rotates to the lower side of the transmission locking rod 42, the transmission locking rod 42 falls to a locking position, and the locking plate 41 locks the transmission locking rod at the position; preferably, the center line of the groove 4314 is offset from the radius of the pivoting locking piece 431 by an acute angle α, which facilitates insertion of the locking bolt 2.

Further, the drive lock lever 42 is provided with a stop ring 46 for limiting the drive lock lever from falling to the locked position;

in order to make the horizontal movement of the lock plate 41 smooth, an upper guide plate 441 and a lower guide plate 442 are arranged above and below the lock plate 41 and are fixed on the mounting seat 11 in parallel, a horizontal sliding groove 443 is formed between the upper guide plate 441 and the lower guide plate 442, and the sliding groove 443 makes the horizontal movement of the lock plate 41 smooth; in order to enable the transmission lock rod 42 to move up and down smoothly, a guide shaft sleeve 45 is arranged outside the transmission lock rod 42, and the guide shaft sleeve 45 is fixedly arranged on the mounting seat 11 to provide vertical movement guide for the transmission lock rod 42;

when the locking device for the platform sliding door is closed and locked, the push cross rod 21 at the front end of the lock tongue 2 enters the groove 4314 to push the rotary lock plate 431 to rotate, the rotary lock plate 431 at the left side rotates anticlockwise, and the rotary lock plate 431 at the right side rotates clockwise, so that the lock tooth 4313 is just inserted into the square lock hole 22 of the lock tongue 22; meanwhile, the rotary lock piece 431 rotates, so that the protruding part 4311 of the rotary lock piece 431 is separated from the lower end of the transmission lock rod 42 due to rotation, the recessed part 4312 of the rotary lock piece 431 rotates to the lower end of the transmission lock rod 42, the transmission lock rod 42 falls into the recessed part 4312 under the action of the return spring, at the moment, the stop ring 46 limits the transmission lock rod 42 to fall into the recessed part 4312, the transmission lock rod 42 is stopped by the lock plate 41 and cannot move upwards, and therefore the transmission lock rod 42 is kept at the locking position of the recessed part 4312 of the rotary lock piece 431; the stop of the lock plate 41 to the drive rod 42 is achieved by: under the action of the reset force, the electromagnet 31 moves downwards to drive the push rod 311 to move downwards, the push rod 311 drives the left crank connecting rod 33 to rotate clockwise through the driving block 32 to drive the right crank connecting rod 33 to rotate anticlockwise, and the crank connecting rod 33 drives the lock plates 41 on the left side and the right side to move leftwards and rightwards respectively, so that the second U-shaped opening 414 is embedded with the lock rod locking part 421, the width of the second U-shaped opening 414 is smaller than the diameter of the limit lock rod stopping part 422, and therefore the limit lock rod stopping part 422 can move upwards, namely the lock plate 41 locks and keeps the transmission lock rod 42 at the position, and the door can be prevented from being opened due to the unexpected (manual door-pulling) driving of the lock tongue 2, thereby realizing door closing and locking.

When the sliding door is unlocked, the electromagnet 31 of the unlocking mechanism 3 is conducted, the iron core moves upwards to drive the push rod 311 and the driving block 32 to move upwards, the first sliding pin 333 of the crank link 33 inserted into the long hole 321 of the driving block 32 drives the crank link 33 to rotate, namely, drives the left crank link 33 to rotate anticlockwise to drive the right crank link 33 to rotate clockwise, and the crank link 33 drives the locking plates 41 on the left side and the right side to move towards the middle respectively through the second sliding pin 411 inserted into the sliding hole 334 of the second arm 332, so that the second U-shaped opening 414 is separated from the locking rod locking part 421, and the second U-shaped opening 414 releases the limit of the locking rod stopping part 422 to realize unlocking; simultaneously, the lock tongue 2 moves to two sides under the drive of the sliding door, the cross rod 21 is pushed to drive the left rotary lock plate 431 to rotate along the pointer, the right rotary lock plate 431 rotates anticlockwise, the lock teeth 4313 are separated from the square lock hole 22 of the lock tongue 22, and the bulge 4311 of the rotary lock plate 431 just rotates to the lower part of the transmission lock rod 42 under the drive of the rotary lock plate 431, so that the transmission lock rod 42 is jacked up to complete unlocking.

Further, a first travel switch 51 is provided above the push rod 311 of the electromagnet 31, and a second travel switch 52 and a third travel switch 53 are provided above the transmission lock rod 42 on the left and right sides; the push rod 311 has a first triggering portion 312 extending upward for triggering the first travel switch 51, and the locking bar locking portion 421 of the transmission locking bar 42 has a second triggering portion 423 extending upward. The three travel switches are used for detecting the action conditions of the electromagnet 31 and the two transmission lock bars 42 respectively.

When the door is unlocked, the system supplies power, the electromagnet 31 is powered on, the first travel switch 51 is triggered by the first triggering part 312 of the push rod 311, the lock tongue 2 is opened to two sides along with the sliding door, the lock tongue 2 withdraws from the rotary lock plate 431, the rotary lock plate 431 jacks up the transmission lock rod 431, the second triggering parts 423 of the two transmission lock rods 431 trigger the second travel switch 52 and the third travel switch 53 respectively, the second travel switch 52 and the third travel switch 53 are triggered and then are changed into a normally open state from an original normally closed state, and the first travel switch 51 is triggered and then is changed into a normally closed state from an original normally open state. When all three travel switches are triggered, the left and right doors are indicated to be opened and in a door opening state.

When the door is closed and locked, the lock tongue 2 is inserted into the rotary lock piece 431 to drive the rotary lock piece 431 to rotate, the lock teeth 4313 are inserted into the square lock holes 22 of the lock tongue 22, and the two transmission lock rods 431 fall back into the concave parts 4312 of the rotary lock piece 431; at the same time, the iron core of the electromagnet 31 falls under the action of the restoring force, drives the push rod 311 to fall, and the crank connecting rods 33 on the left and right sides respectively rotate clockwise and anticlockwise, and drive the locking plate 41 to respectively move towards the left and right sides, and the locking plate 41 locks and maintains the transmission locking rod 42 at the position. When the transmission lock lever 431 falls, the second and third travel switches 52, 53 are released, respectively, and then the electromagnet 31 is reset, and the first travel switch 51 is released, indicating that both side doors are closed. Similarly, only three travel switches are released, indicating that the door has been closed, and when the first travel switch is released, the second and/or third travel switches are not released, indicating a malfunction.

Referring to fig. 12, a set of second locking teeth 4313 'and second grooves 4314' may be added to the rotary locking plate 431 adjacent to the locking teeth 4313 and grooves 4314 at 90, and may be used to match with the locking bolts when they are arranged in a vertical direction.

It should be noted that the above embodiment is a preferred embodiment of the present invention, in which the driving block 32 is movably connected to the first arm 331, and the driving block 32 may also be provided with a driving pin, and correspondingly, a sliding groove is provided at the free end of the first arm to realize the movable connection between the two. The second arm 332 end of the crank link 33 is movably connected to one end of the lock plate 41, which may also be: a sliding pin is provided at the self-high end of the second arm, and a sliding hole corresponding to the sliding pin is provided at the end of the locking plate 41, so as to realize movable connection. In addition, the locking structure between the locking plate 41 and the transmission locking rod 42 may be other structures for realizing upward movement of the transmission locking rod 42 in the locking position, for example: a lock hole which is horizontally arranged is arranged on the transmission lock rod 42, a lock pin which corresponds to the lock hole is arranged on the lock plate, and the lock pin is provided with two parts: the small diameter part at the front end and the large diameter part behind the small diameter part, the diameter of the large diameter part is matched with the diameter of the lock hole, and the gap between the small diameter part and the lock hole is larger than the unlocking lifting distance of the transmission lock rod; when the small diameter part of the front end of the lock plate is inserted into the lock hole, the transmission lock rod can still move upwards to the unlocking position due to the action of the clearance, and when the large diameter part of the front end plate of the lock is inserted into the lock hole, the limitation of the upward movement of the transmission lock rod can be realized, and the locking is realized, so that the embodiment is only a preferred embodiment of the invention.

The invention discloses a process principle of unlocking and opening a door: the electromagnet 31 is electrified to drive the first travel switch 51 to trigger through the transmission lock rod 42, and meanwhile, the driving block 32 arranged on the push rod 311 of the electromagnet drives the crank connecting rods 33 on two sides to rotate, and the crank connecting rods 33 drive the lock plate 41 to move along the sliding grooves 443, so that the lock plate 41 moves away from the locking position. The motor of the sliding door is started to drive the door body to do door opening movement, the lock tongue 2 arranged on the door body synchronously pulls out the lock head 43, the lock tongue 2 pulls out and simultaneously drives the rotary lock plate 431 to rotate, the rotary lock plate 431 utilizes the self structure, namely the bulge 4311 to jack up the transmission lock rod 42, and the jacked transmission lock rod 42 pushes the second travel switch 52 and the third travel switch 53 to trigger. At this time, the electromagnet 31 is powered off, the electromagnet push rod 311 is retracted under the action of the reset force, the driving block 32 drives the crank connecting rod 33 to rotate and push the lock plate 41 back, but the lock plate 41 cannot return due to the fact that the transmission lock rod 42 is pushed up, and at this time, the first travel switch 51 triggered above the electromagnet cannot be reset and is still in a trigger state. At the moment, the lock tongue withdraws from the lock body to finish opening the door, the three travel switches are all in a trigger state, a normally closed loop connected to the normally closed point position is disconnected, and the normally open point positions of the three travel switches are closed to output signals to the outside after triggering.

The invention relates to a door closing in-place and locking signal extraction principle: the door closing in-place signal is provided by the normally open points of the second and third travel switches 52, 53 on the left and right sides. When the lock tongue 2 is inserted into the lock head 43, the lock tongue 2 drives the rotary lock plate 431 to rotate, the transmission lock rod 42 jacked up after the rotary lock plate 431 rotates moves downwards and resets under the action of the elastic force of the springs of the second travel switch and the third travel switch, the second travel switch and the third travel switch triggered by jacking of the transmission lock rod 42 reset, the normally open point is changed from closed to open, and the normally closed point is changed from open to closed. And a door closing in-place signal is transmitted to the controller through the opening and closing changes of the contacts of the second travel switch and the third travel switch. The locking signal is provided by the normally open point of the first travel switch 51 above the electromagnet 31, after unlocking and opening the door, the locking plate 41 is blocked by the transmission locking rod 42 and can not be reset, so that the first travel switch 51 above the middle electromagnet 31 is still in a trigger state, when the door closing tongue 2 is inserted into the lock body 43, the transmission locking rod 42 is reset, the locking plate 41 is reset to block and eliminate, under the reset force of the first travel switch 51 and the dead weight of the electromagnet push rod 311, the locking plate 41 is reset, the second travel switch and the third travel switch are reset, the normally open point is changed from closed to open, the normally closed point is changed from open to closed, and the change of opening and closing of the travel switch contacts transmits a closing signal to the controller. When all the 3 travel switches are reset, the loops connected with the three normally closed points are conducted, and a loop conduction signal is fed back to the controller.

The above description is illustrative of the invention and is not intended to be limiting, and the invention is intended to provide a station sliding door security lock, it being understood by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the following claims, for example: the movable connection mode of the driving block, the first arm, the second arm end of the crank connecting rod and one end of the locking plate is changed, but all the movable connection modes fall into the protection scope of the invention.

Claims

1. A locking device for a platform sliding door, comprising: a mounting base (11),

the lock bolts (2) are respectively symmetrically arranged on the two sliding doors,

an unlocking mechanism (3) positioned at the central position of the mounting seat (11) and two locking mechanisms (4) symmetrically arranged at two sides of the unlocking mechanism (3);

the unlocking mechanism (3) comprises: an electromagnet (31) for electric unlocking is arranged at the lower part of the central position of the mounting seat (11);

a driving block (32) sleeved on the push rod (311) of the electromagnet (31); the two crank connecting rods (33) are symmetrically arranged at two sides of the push rod (311); the crank connecting rod (33) comprises a first arm (331) and a second arm (332) which are arranged in a V shape, and the joint of the first arm (331) and the second arm (332) is arranged on the mounting seat (11) through a hinge shaft (335); the driving block (32) is movably connected with the first arm (331) and is used for driving the crank connecting rod (33) to rotate;

the locking mechanism (4) comprises:

the two lock plates (41) are horizontally and symmetrically arranged on two sides of the push rod (311), and the end part of the second arm (332) of the crank connecting rod (33) is movably connected with one end of the lock plate (41) and is used for driving the lock plate (41) to switch between a locking position and an unlocking position;

the two transmission lock rods (42) are vertically and symmetrically arranged at two sides of the push rod (311), and the transmission lock rods (42) are rod-shaped; the lock plate (41) is locked with the transmission lock rod (42) through a locking structure, when the lock plate (41) is positioned at a locking position, the transmission lock rod (42) can be stopped from moving upwards, and when the lock plate (41) is positioned at an unlocking position, the restriction on the upward movement of the transmission lock rod (42) is released;

the two lock bodies (43) are symmetrically arranged at two sides of the push rod (311) and are positioned right below the transmission lock rod (42); the top of the lock body (43) is opened for the lower ends of the transmission lock rods (42) to extend in, the outer side surfaces of the two lock bodies (43) are provided with lock holes (4301) for the lock bolts (2) to be inserted in,

the lock tongue (2) is in a strip plate shape, the end part of the lock tongue (2) is inserted into the lock body (43) from the lock hole (4301) and locked with the lock body (43), and drives the transmission lock rod (42) to move up and down, so that the lock plate (41) and the transmission lock rod (42) are switched between a locking position and an unlocking position.

2. A locking device for a platform sliding door according to claim 1, wherein: the driving block (32) is movably connected with the first arm (331) as follows: the central position of the driving block (32) is provided with a waist-shaped long hole (321) which is horizontally arranged; the free end of the first arm (331) is provided with a first sliding pin (333), and the first sliding pins (333) of the two crank connecting rods (33) respectively extend into two sides of the long hole (321) of the driving block (32);

the movable connection between the end of the second arm (332) and one end of the locking plate (41) is that: the free end of the second arm (332) is provided with a kidney-shaped sliding hole (334); one end of the lock plate (41) is provided with a second sliding pin (411), the second sliding pin (411) is matched with a sliding hole (334) on a second arm (332) of the crank connecting rod (33), and the second sliding pin (411) is inserted into the sliding hole (334);

the locking structure comprises: a lock lever locking part (421) which is arranged on the transmission lock lever (42) and is locked with the lock plate (41) and a lock lever stopping part (422) which is stopped by the lock plate (41); a first U-shaped opening (413) arranged on one side of the lock plate (41) facing the transmission lock rod (41) and a second U-shaped opening (414) positioned at the bottom of the first U-shaped opening (413); the opening width of the second U-shaped opening (414) is smaller than the opening width of the first U-shaped opening (413); the diameter of the locking part (421) of the lock rod is smaller than that of the stop part (422) of the lock rod; the width of the second U-shaped opening (414) is larger than the diameter of the locking part (421) of the locking rod and smaller than the diameter of the stopping part (422) of the locking rod, and the diameter of the stopping part (422) of the locking rod is matched with the diameter of the first U-shaped opening (413).

3. A locking device for a platform sliding door according to claim 2, wherein: the lock body (43) comprises a square shell (430), and a rotary lock plate (431) is arranged in the shell (430) through a rotating shaft (432); the two rotary locking plates (431) are symmetrically arranged left and right; the circumference of the rotary lock plate (431) is provided with a bulge (4311), and a concave part (4312) which is adjacent to the bulge (4311) and is arranged at one side facing the electromagnet (31); a protruding locking tooth (4313) is arranged on one side opposite to the concave part (4312) of the rotary locking plate (431), and a U-shaped groove (4314) is arranged on one side, facing the center of the electromagnet (31), of the adjacent locking tooth (4313); the top surface of a shell (430) of the lock body (43) is open, and the lower end of the transmission lock rod (42) extends in;

the outer side surface of a shell (430) of the lock body (43) is provided with a lock hole (4301) for inserting the lock tongue (2), the front end of the lock tongue (2) is provided with a pushing cross rod (21) which is embedded into the groove (4314) and used for pushing the rotary lock plate (431) to rotate, and a square lock hole (22) for inserting a lock tooth (4313) is arranged behind the pushing cross rod (21);

when the lock tongue (2) is inserted, the lock teeth (4313) are inserted into the square lock hole (22), the concave part (4312) rotates to the lower part of the transmission lock rod (42), and the transmission lock rod (42) is in a locking state; when the lock tongue (2) is pulled out, the lock teeth (4313) are separated from the square lock hole (22), the protruding part (4311) rotates to the lower part of the transmission lock rod (42), and the transmission lock rod (42) is in an unlocking state.

4. A locking device for a platform sliding door according to claim 3, wherein:

further, an upper guide plate (441) and a lower guide plate (442) which are fixed on the mounting seat (11) and are arranged in parallel are arranged above and below the lock plate (41), and a horizontal chute (443) for guiding the lock plate (41) is formed between the upper guide plate (441) and the lower guide plate (442).

5. A locking device for a platform sliding door according to claim 4, wherein:

further, a guide shaft sleeve (45) fixedly arranged on the mounting seat (11) is arranged outside the transmission lock rod (42) to provide vertical movement guide for the transmission lock rod (42); a stop ring (46) is provided on the drive lock lever (42) for limiting the drive lock lever to fall to the locked position.

6. A locking device for a platform sliding door according to any one of claims 3 to 5, wherein:

the centre line of the groove (4314) is arranged in a direction offset by an acute angle alpha with the radius of the rotary lock plate (431), and the acute angle alpha is 15-30 degrees.

7. A locking device for a platform sliding door according to any one of claims 1 to 5, wherein: the mounting seat (11) is box-shaped, and a cover plate (12) is arranged in front of the mounting seat (11).

8. A locking device for a platform sliding door according to any one of claims 1 to 5, wherein: a first travel switch (51) is arranged above a push rod (311) of the electromagnet (31), and a second travel switch (52) and a third travel switch (53) are arranged above the transmission lock rod (42) on the left side and the right side; the push rod (311) has a first triggering part (312) extending upwards for triggering the first travel switch (51), and the locking bar locking part (421) of the transmission locking bar (42) has a second triggering part (423) extending upwards.