CN219792102U - Synchronous door vane device of elevator - Google Patents

Abstract

The utility model relates to the technical field of elevators and discloses an elevator synchronous door vane device. The elevator synchronous door knife device comprises a door knife bottom plate, a knife arm assembly, a door knife rocker, a lock hook, an unlocking assembly and a pre-tightening assembly, wherein the door knife rocker is rotationally arranged on the door knife bottom plate, and can drive the knife arm assembly to open or close when rotating; the latch hook is rotatably arranged on the door knife bottom plate; the unlocking assembly comprises an unlocking plate and an unlocking connecting rod, the unlocking plate is rotatably arranged on the door knife bottom plate, the unlocking plate can drive the lock hook to rotate, one end of the unlocking connecting rod is connected with the door knife rocker, the other end of the unlocking connecting rod is connected with the unlocking plate, and the door knife rocker can drive the unlocking plate to rotate through the unlocking connecting rod; the pretension subassembly includes installing support and elastic component, and the installing support is connected with the unblock board, and the one end and the installing support of elastic component are connected, and the other end is connected with the door sword rocker, can compress the elastic component when the door sword rocker rotates. The utility model can solve the problem of secondary door closing and improve the riding experience of passengers.

Description

Synchronous door vane device of elevator

Technical Field

The utility model relates to the technical field of elevators, in particular to an elevator synchronous door vane device.

Background

The door machine is commonly used in the door closing process of the elevator, a synchronous motor of the door machine drives a door knife rocker on a car door hanging plate to move through a synchronous belt, and the door knife rocker drives a knife arm assembly to transport through a transmission structure, so that the elevator car door and the landing door are driven to be closed. And in the final stroke stage of closing the car door, the limiting component for limiting the rotation of the door knife rocker is triggered to unlock due to the approach of the two car door hanging plates, and the door knife rocker drives the knife arm component to release the unlocking door ball of the landing door under the drive of the synchronous belt after being released.

However, the door knife rocker is in a free rotation state relative to the car door at the moment, the force applied by the synchronous belt is used for driving the door knife rocker to rotate, the door knife rocker does not drag the car door to continue to be closed in the free rotation process, the car door temporarily stops to be closed, after the action of the door knife rocker and the knife arm assembly is finished, the door knife rocker is limited to continue to rotate, and then the door knife rocker continues to drive the car door to approach each other to complete the closing of the car door. In the time quantum that limit component released the rotation restriction to the door sword rocker, hold-in range only driven door sword rocker and knife arm assembly motion, the sedan-chair door continues to be closed after the knife arm assembly motion is finished, and this short pause of sedan-chair door causes the bad riding experience of secondary closing the door for the passenger, easily makes the passenger produce panic and produces adverse effect to the elevator brand. In addition, in elevator operation, because the latch hook position is unstable, also take place the problem of closing the door secondarily easily, let the passenger feel that the elevator is not enough safe, take experience poor.

Disclosure of Invention

Based on the problems, the utility model aims to provide the elevator synchronous door vane device which can solve the problem of secondary door closing and improve the riding experience of passengers.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

synchronous door sword device of elevator includes:

a door knife bottom plate;

the cutter arm assembly is arranged on the door cutter bottom plate;

the door knife rocker is rotationally arranged on the door knife bottom plate, and can drive the knife arm assembly to open or close when rotating;

the lock hook is rotationally arranged on the door knife bottom plate;

the unlocking assembly comprises an unlocking plate and an unlocking connecting rod, the unlocking plate is rotatably arranged on the door knife bottom plate, the unlocking plate can drive the lock hook to rotate, one end of the unlocking connecting rod is connected with the door knife rocker, the other end of the unlocking connecting rod is connected with the unlocking plate, and the door knife rocker can drive the unlocking plate to rotate through the unlocking connecting rod;

the pretension assembly comprises a mounting bracket and an elastic piece, wherein the mounting bracket is connected with the unlocking plate, one end of the elastic piece is connected with the mounting bracket, the other end of the elastic piece is connected with the door knife rocker, and the elastic piece can be compressed when the door knife rocker rotates.

As an alternative of the elevator synchronous door vane device, the elevator synchronous door vane device further comprises a car door lock switch, wherein the plugging contact surface of the car door lock switch and the rotation axis of the lock hook are positioned in the same plane.

As an alternative of the elevator synchronous door vane device, the car door lock switch comprises a socket piece and a plug piece, wherein the plug piece is rotatably arranged on the door vane bottom plate, the plug piece is connected with the lock hook, the plug piece can be plugged into or separated from the socket piece, and a plugging contact surface of the plug piece and the socket piece is positioned in the same plane with the rotation axis of the lock hook.

As an alternative scheme of the elevator synchronous door vane device, the cutter arm assembly comprises a first cutter arm and a second cutter arm, and the door vane rocker can drive the first cutter arm and the second cutter arm to open or close when rotating.

As an alternative scheme of the elevator synchronous door knife device, the knife arm assembly further comprises a driving swing rod, the driving swing rod is rotatably arranged on the door knife bottom plate, one end of the driving swing rod is rotatably connected with the first knife arm, the other end of the driving swing rod is rotatably connected with the second knife arm, and the first knife arm and the second knife arm can be driven to open and close by the driving swing rod when the door knife swing rod rotates.

As an alternative of the elevator synchronous door vane device of the utility model, the unlocking connecting rod comprises a first rod and a second rod which are rotatably connected, the first rod is rotatably connected with the door vane rocker, and the second rod is rotatably connected with the driving swing rod.

As an alternative scheme of the elevator synchronous door vane device, the pre-tightening assembly further comprises a guide rod, the elastic piece is sleeved on the guide rod, one end of the guide rod is connected with the door vane rocker, and the other end of the guide rod is connected with the mounting bracket in a sliding manner.

As an alternative scheme of the elevator synchronous door vane device, the mounting bracket is provided with the guide ring, the guide ring is in sliding connection with the guide rod, the guide rod is provided with the stop part, one end of the elastic piece is abutted with the guide ring, and the other end of the elastic piece is abutted with the stop part.

As an alternative scheme of the elevator synchronous door vane device, the unlocking plate is provided with a limiting groove, and the locking hook is provided with a limiting protrusion in sliding fit with the limiting groove.

As an alternative scheme of the elevator synchronous door vane device, the elevator synchronous door vane device further comprises a fixed bracket, wherein the fixed bracket is arranged on the door vane bottom plate, and the lock hook is rotatably arranged on the fixed bracket.

The beneficial effects of the utility model are as follows:

according to the elevator synchronous door knife device, when the elevator is in a natural non-working state, the knife arm assembly is in a closed state, the lock hook is in a locking state, when the elevator is in an elevator door opening and closing running state, the knife arm assembly is still in the closed state, the lock hook is in an unlocking state, when the elevator is in an elevator door closing in-place state and a landing state, the door knife rocker drives the unlocking plate to rotate, the unlocking plate drives the lock hook to rotate so as to lock, meanwhile, the door knife rocker drives the knife arm assembly to open, when the elevator is in a car door opening self-rescue state, the knife arm assembly is still in an open state, the lock hook is unlocked by the external force of door opening action, so that self-rescue is completed, the car door can be opened by the aid of the internal and external rescue of the car, the safety is higher, a pre-tightening assembly is added on the basis of the elevator self-rescue function, the pre-tightening assembly comprises a mounting bracket and an elastic piece, one end of the elastic piece is connected with the mounting bracket, the other end of the elastic piece is connected with the door knife rocker, the elastic piece can compress the elastic piece when the door knife rocker rotates, the compressed elastic piece always applies an acting force for preventing the door rocker from rotating, the acting force for the door rocker, the door rocker can always move smoothly, and the problem of closing the door rocking rod is solved by the locking is always, and the door locking stability is always is solved by the problem of closing the door locking plate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic front view of an elevator synchronous door vane device according to an embodiment of the present utility model in a natural non-operating state;

fig. 2 is a schematic rear view of an elevator synchronous door vane device according to an embodiment of the present utility model in a natural non-operating state;

fig. 3 is a schematic front view of an elevator synchronous door vane device provided in an embodiment of the present utility model in an elevator door opening and closing operation state;

fig. 4 is a schematic rear view of an elevator synchronous door vane device provided in an embodiment of the present utility model in an elevator door opening and closing operation state;

fig. 5 is a schematic front view of an elevator synchronous door vane device provided in an embodiment of the present utility model when an elevator is in a door-closed position and a step-away state;

fig. 6 is a schematic rear view of an elevator synchronous door vane device provided in an embodiment of the present utility model when an elevator is in a door-closed position and a step-away state;

fig. 7 is a schematic front view of an elevator synchronous door vane device provided in an embodiment of the present utility model in a state of self-rescue when a door is taken off in a car;

fig. 8 is a schematic rear view of an elevator synchronous door vane device according to an embodiment of the present utility model in a state of self-rescue when the elevator synchronous door vane device is in a car door-stripping state.

In the figure:

1. a door knife bottom plate; 2. a cutter arm assembly; 3. a door knife rocker; 4. a latch hook; 5. unlocking the assembly; 6. a pretension assembly; 7. a car door lock switch; 8. a fixed bracket; 9. unlocking the rope; 10. unlocking the rod;

11. a track groove; 12. a guide groove;

21. a first cutter arm; 22. a second tool arm; 23. a driving swing rod; 24. driven swing rod;

31. a first section; 32. a second section; 33. a third section;

41. a limit protrusion;

51. unlocking plate; 52. unlocking the connecting rod;

511. a limit groove;

521. a first lever; 522. a second lever;

61. a mounting bracket; 611. a guide ring; 62. an elastic member; 63. a guide rod; 631. a stop portion;

71. a socket member; 72. a plug member.

Detailed Description

In order to make the technical problems solved by the present utility model, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 8, the present embodiment provides an elevator synchronous door vane device, which includes a door vane base plate 1, a vane arm assembly 2, a vane rocker 3, a lock hook 4, an unlocking assembly 5, and a pretensioning assembly 6, the vane arm assembly 2 being disposed on the door vane base plate 1. The door knife rocker 3 is rotatably arranged on the door knife bottom plate 1, and the door knife rocker 3 can drive the knife arm assembly 2 to open or close when rotating. The latch hook 4 is rotatably arranged on the door knife bottom plate 1.

Specifically, door sword bottom plate 1 fixed connection is in one side sedan-chair door, and door sword rocker 3 are located door sword bottom plate 1 and are close to car one side, and door sword rocker 3 keeps away from ground position department rotation and is connected with the power shaft, and the power shaft is connected with the door machine hold-in range, and knife arm subassembly 2 sets up in door sword bottom plate 1 one side that is close to the layer door. When the door is opened, the door knife rocker 3 rotates in a direction away from the car door at the other side under the traction of the door machine synchronous belt, the door knife rocker 3 drives the lock hook 4 to rotate to unlock the car door, and then the door knife rocker 3 drags the car door to open under the traction of the door machine synchronous belt. When the car door is opened, the door knife rocker 3 drives the knife arm assembly 2 to clamp unlocking door balls of the landing door, and the knife arm assembly 2 opens the landing door under the drive of the door knife rocker 3.

The unlocking assembly 5 comprises an unlocking plate 51 and an unlocking connecting rod 52, the unlocking plate 51 is rotatably arranged on the door knife bottom plate 1, the unlocking plate 51 can drive the lock hook 4 to rotate, one end of the unlocking connecting rod 52 is connected with the door knife rocker 3, the other end of the unlocking connecting rod 52 is connected with the unlocking plate 51, and the door knife rocker 3 can drive the unlocking plate 51 to rotate through the unlocking connecting rod 52. The pretensioning assembly 6 includes a mounting bracket 61 and an elastic member 62, the mounting bracket 61 is connected with the unlocking plate 51, one end of the elastic member 62 is connected with the mounting bracket 61, the other end is connected with the door knife rocker 3, and the elastic member 62 can be compressed when the door knife rocker 3 rotates.

When the elevator is in a natural non-working state, the knife arm assembly 2 is in a closed state, and the lock hook 4 is in a locking state. When the elevator is in the elevator door opening and closing operation state, the cutter arm assembly 2 is still in the closed state, and the lock hook 4 is in the unlocking state. When the elevator is in a state of closing the door in place and moving the elevator, the door knife rocker 3 drives the unlocking plate 51 to rotate through the unlocking connecting rod 52, the unlocking plate 51 drives the lock hook 4 to rotate to lock, and meanwhile, the door knife rocker 3 drives the knife arm assembly 2 to open. When the elevator is in a lift car door-pulling self-rescue state, the cutter arm assembly 2 is still in an open state, and the lock hook 4 is unlocked by the external force applied by door-pulling action, so that self-rescue is completed, the elevator door can be pulled off by lift car inner and outer rescue during leveling, and the safety is higher.

The pre-tightening assembly 6 is added on the basis of the elevator self-rescue function, the pre-tightening assembly 6 comprises the mounting bracket 61 and the elastic piece 62, the mounting bracket 61 is connected with the unlocking plate 51, one end of the elastic piece 62 is connected with the mounting bracket 61, the other end of the elastic piece is connected with the door knife rocker 3, the elastic piece 62 can be compressed when the door knife rocker 3 rotates, the compressed elastic piece 62 always applies an acting force for preventing the door knife rocker 3 from rotating, the movement stability of the door knife rocker 3 is enhanced, the smoothness of closing a car door is improved, the problem of secondary door closing can be solved, and the force of the elastic piece 62 is always transmitted to the unlocking plate 51 through the mounting bracket 61, so that the lock hook 4 always receives an acting force for falling a lock.

Optionally, the elevator synchronous door knife device further comprises a car door lock switch 7, wherein the plugging contact surface of the car door lock switch 7 and the rotation axis of the lock hook 4 are positioned in the same plane. On the basis of integrating the car door lock switch 7, the plug-in contact surface of the car door lock switch 7 is ensured to pass through the rotating point of the lock hook 4, so that the contact is in an optimal working state, and the service life of the car door lock switch 7 is prolonged.

Alternatively, the car door lock switch 7 includes a socket 71 and a plug 72, the plug 72 is rotatably disposed on the door knife base plate 1, the plug 72 is connected with the latch hook 4, the plug 72 can be plugged into or separated from the socket 71, and the plugging contact surfaces of the plug 72 and the socket 71 are located in the same plane with the rotation axis of the latch hook 4. The door lock switch 7 is an important part of the elevator and its function is to fix the door and to ensure the safety of passengers. The working principle of the car door lock switch 7 is that the lock hook 4 is fixed on the door frame by electromagnetic force to keep the car door closed. When the elevator reaches a specified floor, the elevator control system sends an unlocking signal to enable the lock hook 4 to be separated from the door frame, and the car door can be opened. The locking hook 4 is a metal rod fixed to the door and has a generally L-shaped end which can be conveniently snapped into a locking hole in the door frame. The socket member 71 and the plug member 72 may constitute an electromagnetic lock, and the principle of operation may be to generate a magnetic field when a current is applied, thereby attracting the latch bolt and fixing it to the door frame. The attraction force of the electromagnetic lock depends on the magnitude of the current and the strength of the magnetic field, and can usually bear a certain tensile force. When the socket 71 and the plug 72 are plugged, a sufficient attraction force is generated under the action of current to clamp the latch hook 4 on the door frame, so that the closed state of the car door is maintained.

Alternatively, the cutter arm assembly 2 includes a first cutter arm 21 and a second cutter arm 22, and the door cutter rocker 3 can drive the first cutter arm 21 and the second cutter arm 22 to open or close when rotating. The first cutter arm 21 and the second cutter arm 22 are vertically arranged, and when the car door is opened, the door knife rocker 3 drives the first cutter arm 21 and the second cutter arm 22 to be closed so as to clamp an unlocking door ball of the landing door.

Optionally, the cutter arm assembly 2 further includes a driving swing rod 23, the driving swing rod 23 is rotatably disposed on the cutter base plate 1, one end of the driving swing rod 23 is rotatably connected with the first cutter arm 21, the other end of the driving swing rod is rotatably connected with the second cutter arm 22, and when the cutter arm assembly 3 rotates, the driving swing rod 23 can drive the first cutter arm 21 and the second cutter arm 22 to open and close. The door knife rocker 3 and the driving rocker 23 are respectively positioned at two sides of the door knife bottom plate 1, and the driving rocker 23 is downwards inclined from one end close to the car door at the other side to one end far from the car door at the other side. When the door knife rocker 3 rotates, the driving swing rod 23 drives the first knife arm 21 and the second knife arm 22 to move the vertical first knife arm 21 and the second knife arm 22 towards the direction of approaching to each other, the first knife arm 21 and the second knife arm 22 clamp unlocking door balls of the landing door, and the knife arm assembly 2 opens the landing door under the driving of the door knife rocker 3.

In order to ensure the motion stability of the first cutter arm 21 and the second cutter arm 22, the cutter arm assembly 2 further comprises a driven swing rod 24, the driving swing rod 23 and the driven swing rod 24 are parallel to each other, and the driven swing rod 24 is inclined downwards from one end close to the car door at the other side to one end far from the car door at the other side. The driving rocker and the driven rocker cooperate to move the vertical first cutter arm 21 and the vertical second cutter arm 22 towards the direction of approaching each other, the unlocking door ball of the landing door is clamped by the first cutter arm 21 and the second cutter arm 22, and the landing door is opened by the cutter arm assembly 2 under the drive of the door cutter rocker 3.

Alternatively, the unlocking link 52 comprises a first lever 521 and a second lever 522 rotatably connected, the first lever 521 being rotatably connected with the knife rocker 3, the second lever 522 being rotatably connected with the driving swing link 23. Since the door knife rocking bar 3 and the driving rocking bar 23 are respectively located at two sides of the door knife bottom plate 1, the unlocking connecting rod 52 adopts a two-section structure, the first rod 521 and the second rod 522 are respectively located at two sides of the door knife bottom plate 1, and the rotation connection of the first rod 521 and the second rod 522 can be realized through a rotating shaft. The vane base plate 1 is provided with a guide groove 12, and the guide groove 12 guides the rotation shafts of the first lever 521 and the second lever 522. The rotation shafts of the first lever 521 and the second lever 522 apply a force to the unlocking plate 51, so that the unlocking plate 51 rotates.

Optionally, the pretensioning assembly 6 further includes a guide rod 63, the elastic member 62 is sleeved on the guide rod 63, one end of the guide rod 63 is connected with the door knife rocker 3, and the other end is slidably connected with the mounting bracket 61. The elastic member 62 can be a spring, and has the advantages of convenient material taking and low cost. To facilitate the installation of the elastic member 62, optionally, the installation support 61 is provided with a guide ring 611, the guide ring 611 is slidably connected with the guide rod 63, the guide rod 63 is provided with a stop portion 631, and one end of the elastic member 62 abuts against the guide ring 611, and the other end abuts against the stop portion 631.

For convenience, the unlocking plate 51 drives the lock hook 4, optionally, a limiting groove 511 is provided on the unlocking plate 51, and a limiting protrusion 41 slidingly engaged with the limiting groove 511 is provided on the lock hook 4. For easy installation of the latch hook 4, optionally, the elevator synchronous door vane device further comprises a fixing bracket 8, the fixing bracket 8 is arranged on the door vane bottom plate 1, and the latch hook 4 is rotatably arranged on the fixing bracket 8.

The door knife rocker 3 may comprise a first portion 31, a second portion 32 and a third portion 33, the first portion 31 is rotatably connected with a power shaft, the power shaft is connected with a door machine synchronous belt, the second portion 32 is rotatably connected with the guide rod 63, and the third portion 33 is rotatably connected with the first rod 521. The door knife bottom plate 1 is provided with a track groove 11, a convex shaft is arranged in the middle of the first part 31 and penetrates through the track groove 11, and the track groove 11 guides the movement track of the door knife rocking bar 3.

The elevator synchronous door knife device further comprises an unlocking rope 9 and an unlocking rod 10, wherein the unlocking rope 9 is connected to one end of the unlocking rod 10, the middle part of the unlocking rod 10 is rotatably connected to the door knife bottom plate 1, and the other end of the unlocking rod 10 can be abutted against the locking hook 4. When the elevator is accidentally parked, a rescuer pulls the unlocking rope 9 downwards from the outside, and the unlocking rod 10 can be driven to rotate, so that the unlocking rod 10 drives the lock hook 4 to lift, and the car door is conveniently pulled off.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. Synchronous door sword device of elevator, its characterized in that includes:

a door knife bottom plate (1);

the cutter arm assembly (2) is arranged on the door cutter bottom plate (1);

the door knife rocking rod (3) is rotationally arranged on the door knife bottom plate (1), and the door knife rocking rod (3) can drive the knife arm assembly (2) to open or close when rotating;

the lock hook (4) is rotationally arranged on the door knife bottom plate (1);

the unlocking assembly (5) comprises an unlocking plate (51) and an unlocking connecting rod (52), the unlocking plate (51) is rotatably arranged on the door knife bottom plate (1), the unlocking plate (51) can drive the lock hook (4) to rotate, one end of the unlocking connecting rod (52) is connected with the door knife rocker (3), the other end of the unlocking connecting rod is connected with the unlocking plate (51), and the door knife rocker (3) can drive the unlocking plate (51) to rotate through the unlocking connecting rod (52);

the pretension assembly (6) comprises a mounting bracket (61) and an elastic piece (62), wherein the mounting bracket (61) is connected with the unlocking plate (51), one end of the elastic piece (62) is connected with the mounting bracket (61), the other end of the elastic piece is connected with the door knife rocker (3), and the elastic piece (62) can be compressed when the door knife rocker (3) rotates.

2. The synchronous elevator door knife device according to claim 1, characterized in that it further comprises a car door lock switch (7), the plug contact surface of the car door lock switch (7) being located in the same plane as the rotation axis of the locking hook (4).

3. The elevator synchronous door vane device according to claim 2, characterized in that the car door lock switch (7) comprises a socket piece (71) and a plug piece (72), the plug piece (72) is rotatably arranged on the door vane base plate (1), the plug piece (72) is connected with the lock hook (4), the plug piece (72) can be plugged with or separated from the socket piece (71), and the plugging contact surface of the plug piece (72) and the socket piece (71) is located in the same plane with the rotation axis of the lock hook (4).

4. The synchronous elevator door knife device according to claim 1, wherein the knife arm assembly (2) comprises a first knife arm (21) and a second knife arm (22), and the door knife rocker (3) can drive the first knife arm (21) and the second knife arm (22) to open or close when rotating.

5. The elevator synchronous door knife device according to claim 4, wherein the knife arm assembly (2) further comprises a driving swing rod (23), the driving swing rod (23) is rotatably arranged on the door knife base plate (1), one end of the driving swing rod (23) is rotatably connected with the first knife arm (21), the other end of the driving swing rod is rotatably connected with the second knife arm (22), and the first knife arm (21) and the second knife arm (22) can be driven to open and close by the driving swing rod (23) when the door knife swing rod (3) rotates.

6. The synchronous door knife device of claim 5, characterized in that the unlocking link (52) comprises a first lever (521) and a second lever (522) which are rotatably connected, the first lever (521) being rotatably connected with the door knife rocker (3), the second lever (522) being rotatably connected with the driving rocker (23).

7. The synchronous elevator door knife device according to claim 1, wherein the pre-tightening assembly (6) further comprises a guide rod (63), the elastic piece (62) is sleeved on the guide rod (63), one end of the guide rod (63) is connected with the door knife rocker (3), and the other end of the guide rod is connected with the mounting bracket (61) in a sliding mode.

8. The elevator synchronous door knife device according to claim 7, wherein a guide ring (611) is arranged on the mounting bracket (61), the guide ring (611) is slidably connected with the guide rod (63), a stop portion (631) is arranged on the guide rod (63), one end of the elastic piece (62) is abutted to the guide ring (611), and the other end is abutted to the stop portion (631).

9. The elevator synchronous door knife device according to claim 1, characterized in that a limit groove (511) is arranged on the unlocking plate (51), and a limit protrusion (41) which is in sliding fit with the limit groove (511) is arranged on the locking hook (4).

10. The synchronous elevator door knife device according to claim 1, further comprising a fixed bracket (8), wherein the fixed bracket (8) is arranged on the door knife bottom plate (1), and the lock hook (4) is rotatably arranged on the fixed bracket (8).