CN216110489U

CN216110489U - Crank connecting rod assembly and one-way door

Info

Publication number: CN216110489U
Application number: CN202121655444.0U
Authority: CN
Inventors: 薛原; 薛荣森
Original assignee: Xiangyang Sixiang Electromechanical Technology Co ltd
Current assignee: Xiangyang Sixiang Electromechanical Technology Co ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2022-03-22
Anticipated expiration: 2031-07-20

Abstract

The utility model relates to the technical field of one-way doors and discloses a crank connecting rod assembly and a one-way door. The one-way door comprises a rack, a crank connecting rod assembly, a main door and an auxiliary door, wherein the main door and the auxiliary door are rotationally connected to the rack, the crank is rotationally connected to the rack, and the connecting rod is used for driving the auxiliary door to move, so that the one-way door has the following advantages and effects: through installing the weight increasing block on the crank, when the crank moves, the weight increasing block moves along with the crank, so that the crank has larger movement inertia, and when the crank drives the auxiliary door to move through the connecting rod, the crank and the connecting rod move more stably and smoothly. The weight increasing block is preferably arranged at one end of the crank close to the connecting rod. The crank connecting rod assembly can be suitable for one-way doors of various different types, and is wide in application range and high in practicability.

Description

Crank connecting rod assembly and one-way door

Technical Field

The utility model relates to the technical field of one-way doors, in particular to a crank connecting rod assembly and a one-way door.

Background

The one-way door is a one-way passing door and is generally used in railway stations, high-speed railway stations, airports and other places. The comb-shaped one-way door is a common one-way door, the inner side and the outer side of the comb-shaped one-way door can mutually transmit articles, the security hidden danger exists, and the security anti-terrorism requirement cannot be met. In order to overcome the defects and shortcomings of the comb-shaped one-way door, the applicant submits a utility model patent with application number 201921495110.4 and named as a pulley system of the one-way door to the Chinese intellectual property office in 2019, 9, 10, and the crank is arranged on a one-way door frame and is hinged with a connecting rod which is hinged with the pulley. The crank drives the pulley to do linear reciprocating motion along the slide rail through the connecting rod.

In actual work, the applicant finds that the patent product has the following problems in operation: when the pulley is located at one end of the movement stroke, the crank and the connecting rod need large force to drive the pulley to move reversely, and the movement process of the crank and the connecting rod is not smooth. In order to solve the technical problem, the applicant improves the product and puts forward the application.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a crank connecting rod assembly which has the effects of increasing the motion inertia of a crank and enabling the crank and the connecting rod to move stably.

The technical purpose of the utility model is realized by the following technical scheme: a crank connecting rod assembly comprises a crank and a connecting rod hinged to the crank, wherein a weight increasing block is installed on the crank.

By adopting the technical scheme, the weight increasing block is arranged on the crank, so that the inertia of the crank connecting rod assembly during movement is increased, the crank and the connecting rod are more stable, and the movement speed is more balanced.

The utility model is further provided with: the weight increasing block is fixedly arranged on the crank through a bolt and a nut.

By adopting the technical scheme, the weight increasing block and the crank can be connected in a plurality of ways only by fixing the weight increasing block and the crank together. The bolt and the nut are common fasteners and are used for connecting the weight increasing block and the crank, so that the installation is convenient and fast, and the cost is low.

The utility model is further provided with: the weight increasing block comprises a first seat body and a second seat body, the crank is located between the first seat body and the second seat body, and the first seat body and the second seat body are fixed through bolts and nuts.

Through adopting above-mentioned technical scheme, it is fixed through bolt, nut between pedestal one, the pedestal two, press from both sides the crank tightly to make the weight gain piece fixed mutually with the crank.

The utility model is further provided with: the weight increasing block is installed at one end of the crank close to the connecting rod.

By adopting the technical scheme, the weight increasing block is only required to be arranged on the crank, and the selection of the specific installation position does not influence the implementation of the utility model. Preferably, if the weight increasing block is installed at one end of the crank close to the connecting rod, the better proposal is that the weight increasing block enhances the smoothness of the motion of the crank and the connecting rod.

The utility model also provides a one-way door, which comprises a frame, a crank connecting rod assembly, a main door and an auxiliary door, wherein the main door and the auxiliary door are rotatably connected to the frame, the crank is rotatably connected to the frame, and the connecting rod is used for driving the auxiliary door to move.

By adopting the technical scheme, the main door can be pushed by personnel, and a power device such as a motor and the like can be arranged on the frame to drive the main door to automatically rotate. The crank is driven to rotate in two modes, wherein one mode is that a transmission mechanism is arranged between the main door and the crank, and the main door drives the crank to rotate through the transmission mechanism when rotating. And the other is that a power device such as a motor and the like is arranged to drive the crank to rotate, and any mode can be selected.

The utility model is further provided with: the rack is movably provided with a pulley, and the connecting rod is hinged with the pulley; the rack is provided with a rotatable winding drum and an elastic piece, the auxiliary door comprises a plurality of door sheets which are sequentially hinged, and the auxiliary door is wound on the winding drum; one end of the auxiliary door is fixed with the winding drum, and the other end of the auxiliary door is fixed with the pulley; the elastic piece drives the winding drum to rotate by elasticity so as to wind the auxiliary door.

By adopting the technical scheme, the rack can be movably provided with the pulley, namely the pulley can move on the rack, the motion track is a straight line, the pulley can be in sliding connection with the rack, and the roller can rotate on the rack after the roller is installed on the pulley.

The connecting rod is hinged with the pulley, the crank rotates to drive the connecting rod to move, and the connecting rod moves to drive the pulley to do reciprocating linear motion on the rack. When the pulley is close to the main door, the auxiliary door is driven to be unfolded and unreeled from the reel. The pulley is far away from the main door, and the winding drum rotates under the action of the elastic part to wind the auxiliary door.

The utility model is further provided with: the auxiliary door comprises a first door leaf, the first door leaf is movably arranged on the rack, and the connecting rod is hinged with the first door leaf.

By adopting the technical scheme, the first door leaf is movably arranged on the rack, namely the first door leaf can move on the rack, the movement track is a straight line, and the friction form between the first door leaf and the rack can be rolling friction (for example, rollers are arranged on the second door leaf, and a guide rail with a groove is arranged on the rack) or sliding friction.

The utility model is further provided with: the auxiliary door further comprises a second door leaf, the second door leaf is movably arranged on the rack, a first connecting column is fixed on the crank, a second crank is fixed on the first connecting column, the second crank is hinged to a second connecting rod, and the second connecting rod is hinged to the second door leaf.

By adopting the technical scheme, the second door leaf is movably arranged on the rack, that is, the second door leaf can move on the rack, the movement track is a straight line, and the friction form between the second door leaf and the rack can be rolling friction (for example, rollers are arranged on the second door leaf, and a guide rail with a groove is arranged on the rack) or sliding friction.

The second door leaf is parallel to the first door leaf, and the second door leaf is arranged to have the effect that when the first door leaf and the second door leaf are close to the main door, the first door leaf and the second door leaf are staggered with each other to jointly prevent personnel from reversely passing through the one-way door. When the first door leaf and the second door leaf are far away from the main door, the first door leaf and the second door leaf can be stacked to reduce the overall occupied space of the first door leaf and the second door leaf.

The utility model is further provided with: the auxiliary door further comprises a third door leaf, the third door leaf is movably arranged on the rack, a second connecting column is fixed on the second crank, a third crank is fixed on the second connecting column, a third connecting rod is hinged to the third crank, and the third connecting rod is hinged to the third door leaf.

The utility model is further provided with: the main door comprises a main shaft rotationally connected to the rack and a plurality of main door leaves fixed on the main shaft; the rack is provided with a one-way device for limiting the one-way rotation of the main door; and a transmission mechanism for transmitting power is arranged between the main door and the crank or the crank is fixed on the main shaft.

By adopting the technical scheme, the one-way device is used for enabling the main door to rotate only along one direction and not rotate reversely.

The utility model has the beneficial effects that:

1. through installing the weight increasing block on the crank, when the crank moves, the weight increasing block moves along with the crank, so that the crank has larger movement inertia, and when the crank drives the auxiliary door to move through the connecting rod, the crank and the connecting rod move more stably and smoothly.

2. The weight increasing block is divided into a first seat body and a second seat body which are connected through a bolt and a nut, the crank is located between the first seat body and the second seat body, the first seat body and the second seat body clamp the crank tightly, connection and fixation between the weight increasing block and the crank are achieved, installation and disassembly are very convenient, and meanwhile, the position of the weight increasing block on the crank can be adjusted according to needs after the bolt is loosened.

3. The weight increasing block is preferably arranged at one end of the crank close to the connecting rod.

4. The crank connecting rod assembly can be suitable for one-way doors of various different types, and is wide in application range and high in practicability.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural relationship diagram between a rack and a main door of the first embodiment.

FIG. 2 is a schematic view showing the structural relationship among the frame, the sub-door, the pulley, the crank, and the connecting rod according to the first embodiment.

FIG. 3 is a schematic view of the structural relationship among the crank, the weight increasing block and the connecting rod according to the first embodiment.

Fig. 4 is an exploded view of the fixed shaft, the elastic member and the sub-door according to the first embodiment.

Fig. 5 is a schematic structural relationship diagram between the rack and the main door of the second embodiment.

Fig. 6 is a schematic view showing the structural relationship among the main door, the crank, the link, and the sub-door according to the second embodiment.

Fig. 7 is a schematic view of the structural relationship among the crank, the second crank, the connecting rod, the second connecting rod and the third connecting rod in the second embodiment.

FIG. 8 is a schematic view showing the structural relationship among the frame, the one-way device, and the crank according to the second embodiment.

Fig. 9 is a schematic structural view of a unidirectional device of the second embodiment.

In the figure, 1, a frame; 11. a channel; 12. a pulley; 13. a reel; 14. an elastic member; 15. a fixed shaft; 16. a first slide rail; 161. a first sliding block; 17. a second slide rail; 171. a second sliding block; 18. a third slide rail; 181. a third sliding block; 2. a main door; 21. a main shaft; 211. a drive gear; 22. a main door leaf; 3. a sub-door; 31. a first door leaf; 32. a second door leaf; 33. a third door leaf; 34. a door leaf; 4. a crank; 41. connecting a column I; 42. a crank II; 43. connecting a second column; 44. a third crank; 5. a connecting rod; 51. a first output terminal; 6. a second connecting rod; 61. a second output terminal; 7. a third connecting rod; 71. a third output terminal; 8. a weight increasing block; 81. a first seat body; 82. a second seat body; 83. a bolt; 9. a transmission mechanism; 91. an input shaft; 92. a driven gear; 10. a one-way device; 101. installing a shaft; 102. a one-way bearing; 103. a one-way gear.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

The first embodiment is as follows: a one-way door, as shown in fig. 1, 2 and 3, comprises a frame 1, a main door 2 and an auxiliary door 3, wherein a channel 11 is formed in the frame 1, one side of the channel 11 is an inlet, and the other side of the channel 11 is an outlet. The main door 2 comprises a main shaft 21 and three main door leaves 22 fixed on the main shaft 21, and the main shaft 21 is rotatably connected on the frame 1. The main door leaf 22 comprises a frame and a transparent glass fixed inside the frame. The frame 1 is rotatably connected with a winding drum 13, the auxiliary door 3 comprises a plurality of door sheets 34 which are sequentially hinged, and the auxiliary door 3 is wound on the winding drum 13. The winding drum 13 is arranged in a hollow mode, a through hole is formed in the upper end of the winding drum, a fixing shaft 15 penetrating through the through hole downwards is fixed on the rack 1, a bearing is installed at the through hole, and an inner ring of the bearing is fixed with the fixing shaft 15 in the axial direction. The fixed shaft 15 is provided with an elastic part 14, the elastic part 14 is a torsion spring, and one end of the torsion spring is sleeved on the fixed shaft 15 and is fixedly connected with the fixed shaft 15. The other end of the torsion spring is fixedly connected with the inner wall of the winding drum 13, and the elasticity of the torsion spring drives the winding drum 13 to rotate so as to wind the auxiliary door 3.

As shown in fig. 2, a slide rail is fixed on the frame 1, a pulley 12 is mounted on the slide rail, and the pulley 12 can move on the frame 1 along the slide rail. One end of the auxiliary door 3 is fixed to the drum 13, and the other end is fixed to the pulley 12. As shown in fig. 4, a crank connecting rod assembly is arranged on the frame 1, the crank connecting rod assembly includes a crank 4 fixed on the main shaft 21 and a connecting rod 5 hinged to the crank 4, and one end of the connecting rod 5 far away from the crank 4 is hinged to the pulley 12. The crank 4 is provided with the weight increasing block 8, the weight increasing block 8 is arranged at one end of the crank 4 close to the connecting rod 5, the weight increasing block 8 comprises a first seat body 81 and a second seat body 82, the crank 4 is positioned between the first seat body 81 and the second seat body 82, and the first seat body 81 and the second seat body 82 are connected through a bolt 83 and a nut, so that the first seat body 81 and the second seat body 82 are clamped and fixed on the crank 4. The weight-increasing block 8 is arranged on the crank 4, so that the inertia is large when the crank 4 and the weight-increasing block 8 move, and the crank 4 drives the pulley 12 to move in a reversing way through the connecting rod 5 to be more stable.

The rack 1 is provided with a one-way device 10, the one-way device 10 comprises a mounting shaft 101 fixed on the rack 1, a one-way bearing 103 mounted on the mounting shaft 101, a one-way gear 103 mounted on the outer ring of the one-way bearing 102, and a driving gear mounted on a main shaft, wherein the one-way gear 103 is meshed with the driving gear. In addition, other structures capable of realizing the unidirectional rotation of the main door 2 may be adopted as long as the function of limiting the unidirectional rotation of the main door 2 is realized.

The working principle is as follows: a person enters the channel 11 from the entrance, pushes the main door leaf 22 to move forward, the main door 2 rotates, the main shaft 21 of the main door 2 drives the crank 4 to move, and the crank 4 drives the pulley 12 to move on the rack 1 along the sliding rail through the connecting rod 5. When the main door 2 is close to the auxiliary door 3, the pulley 12 is far away from the main shaft 21, so that the main door leaf 22 can pass through the auxiliary door 3. After the main door leaf 22 has passed the auxiliary door 3, the trolley 12 is again brought close to the main shaft 21 to prevent persons from passing through the passageway 11 from the exit side of the passageway 11 in the opposite direction as the main door 2 rotates.

Example two: a one-way door, as shown in fig. 5 and 6, comprises a frame 1, wherein a passage 11 is formed in the frame 1 for passengers to pass through. The main door 2 positioned in the channel 11 is installed in the frame 1, and the main door 2 comprises a main shaft 21 rotatably connected to the frame 1 and three main door leaves 22 fixed on the main shaft 21. The frame 1 is rotatably provided with an input shaft 91, a crank group connected with the input shaft 91 and a connecting rod group connected with the crank 4 group. The input shaft 91 is parallel to the main shaft 21, and the input shaft 91 is linked with the main shaft 21. The main shaft 21 is fixed with a driving gear 211, the input shaft 91 is fixed with a driven gear 92, the diameter of the driving gear 211 is larger than that of the driven gear 92, and the driving gear 211 is meshed with the driven gear 92. The input shaft 91, the driving gear 211 and the driven gear 92 constitute a transmission mechanism 9 for transmitting the power of the main door 2 to the crank 4.

As shown in fig. 6 and 7, the crank 4 group includes a crank 4 fixed to the input shaft 91, a second crank 42 provided on the crank 4, and a third crank 44 provided on the second crank 42. The connecting rod 5 group comprises a first connecting rod 5 hinged with the crank 4, a second connecting rod 6 hinged with the second crank 42 and a third connecting rod 5 hinged with the third crank 44. The end of the first connecting rod 5 far away from the crank 4 is the first output end 51, the end of the second connecting rod 6 far away from the second crank 42 is the second output end 61, and the end of the third connecting rod 5 far away from the crank 4 is the third output end 71. The rack 1 is provided with an auxiliary door 3 group in a sliding manner, the auxiliary door 3 group comprises a first door leaf 31, a second door leaf 32 and a third door leaf 33, a first output end 51 is used for driving the first door leaf 31 to reciprocate, a second output end 61 is used for driving the second door leaf 32 to reciprocate, and a third output end 71 is used for driving the third door leaf 33 to reciprocate. The crank 4 and the connecting rod 5 form a crank connecting rod component.

As shown in fig. 7, a first connecting column 41 is fixed on the crank 4, and a first hinge hole (not shown) for the first connecting column 41 to pass through is formed in the first connecting rod 5, so as to hinge the first connecting rod 5 on the crank 4. The second crank 42 is fixed on the first connecting column 41, the second connecting column 43 is fixed on the second crank 42, and the second connecting rod 6 is provided with a second hinge hole (not shown) for the second connecting column 43 to pass through so as to hinge the second connecting rod 6 on the second crank 42. The third crank 44 is fixed on the second connecting column 43, the third connecting column is fixed on the third crank 44, and the third connecting rod 5 is provided with a third hinge hole (not shown) for the third connecting column to pass through so as to enable the third connecting rod 5 to be hinged on the third crank 44.

As shown in fig. 5 and 6, a first sliding groove (not shown in the figure) located below the first door leaf 31, a second sliding groove (not shown in the figure) located below the second door leaf 32, and a third sliding groove (not shown in the figure) located below the third door leaf 33 are formed in the rack 1, the lower end of the first door leaf 31 is embedded into the first sliding groove (not shown in the figure), the lower end of the second door leaf 32 is embedded into the second sliding groove (not shown in the figure), the lower end of the third door leaf 33 is embedded into the third sliding groove (not shown in the figure), and casters (not shown in the figure) are installed at the bottoms of the first door leaf 31, the second door leaf 32, and the third door leaf 33 to reduce friction during movement. A first sliding rail 16 positioned above a first door leaf 31, a second sliding rail 17 positioned above a second door leaf 32 and a third sliding rail 18 positioned above a third door leaf 33 are fixed on the rack 1, and the first sliding rail 16, the second sliding rail 17 and the third sliding rail 18 are parallel to each other. The first sliding rail 16 is slidably connected with a first sliding block 161, the first door leaf 31 is fixed with the first sliding block 161, and the first output end 51 is hinged with the first sliding block 161. The second sliding rail 17 is slidably connected with a second sliding block 171, the second door leaf 32 is fixed with the second sliding block 171, and the second output end 61 is hinged with the second sliding block 171. The third sliding rail 18 is slidably connected with a third sliding block 181, the third door leaf 33 is fixed with the third sliding block 181, and the third output end 71 is hinged with the third sliding block 181.

As shown in fig. 8 and 9, the rack 1 is provided with a one-way device 10 for limiting the one-way rotation of the main door 2, the one-way device 10 comprises an installation shaft 101 fixed on the rack 1, a one-way bearing 102 installed on the installation shaft 101, and a one-way gear 103 installed on the outer ring of the one-way bearing 102, the one-way gear 103 is meshed with the driving gear 211, and the one-way bearing 102 can rotate in one direction to limit the one-way rotation of the one-way gear 103, thereby limiting the one-way rotation of the main door 2, and preventing passengers from pushing the main door 2 to rotate in the opposite direction to pass through the one-way door in the opposite direction.

The working principle of the one-way door is as follows: the passenger enters the passageway 11 and pushes the main door 2 to rotate so as to pass through the one-way door. The main shaft 21 of the main door 2 drives the driven gear 92 and the input shaft 91 to rotate through the driving gear 211, the input shaft 91 drives the crank 4 groups to move, the crank 4 groups drive the auxiliary door 3 groups to move through the connecting rod 5 groups, the first output end 51 of the first connecting rod 5 drives the first door leaf 31 to do reciprocating motion, the second output end 61 of the second connecting rod 6 drives the second door leaf 32 to do reciprocating motion, the third output end 71 of the third connecting rod 5 drives the third door leaf 33 to do reciprocating motion, the motion stroke of the first door leaf 31 is larger than that of the second door leaf 32, and the motion stroke of the second door leaf 32 is larger than that of the third door leaf 33. When the auxiliary door 3 group is positioned between the two door leaves, the auxiliary door 3 group is in a state closest to the main shaft 21, and the positions of the first door leaf 31, the second door leaf 32 and the third door leaf 33 are staggered, so that the inner side and the outer side of the unidirectional door are blocked together. When the main door 2 continues to rotate, the first output end 51 drives the first door leaf 31 to move away from the main shaft 21, the second output end 61 drives the second door leaf 32 to move away from the main shaft 21, and the third output end 71 drives the third door leaf 33 to move away from the main shaft 21 until the first door leaf 31, the second door leaf 32 and the third door leaf 33 all move out of the movement track of the outer edge of the main door 2, so that the door leaves can smoothly pass through the set of the auxiliary doors 3. After the door leaves are opened at the position of the auxiliary door 3, the first output end 51 drives the first door leaf 31 to move to be close to the main shaft 21, the second output end 61 drives the second door leaf 32 to move to be close to the main shaft 21, and the third output end 71 drives the third door leaf 33 to move to be close to the main shaft 21 until the first door leaf 31, the second door leaf 32 and the third door leaf 33 move to be closest to the main shaft 21. During the rotation of the main door 2, the movement track of the outer edge of the main door 2 is intersected with the movement track of one end of the auxiliary door 3 group close to the main door 2.

Example three: a one-way door is different from the first embodiment in that a crank 4 is not directly fixed on a main shaft 21, an input shaft 91 is rotatably connected to a frame 1, the crank 4 is directly fixed on the input shaft 91, and a gear train for transmitting power is arranged between the main shaft 21 and the input shaft 91.

Example four: a one-way door is different from the first embodiment in that a crank 4 is not directly fixed to a main shaft 21. The frame 1 is rotatably connected with an input shaft 91, and the crank 4 is fixed on the input shaft 91. The frame 1 is provided with a motor for driving the input shaft 91 to rotate.

Example five: a one-way door is different from the second embodiment in that a secondary door 3 does not comprise a third door leaf 33, and the one-way door does not comprise a third crank 44 and a third connecting rod 5.

Example five: the one-way door is different from the second embodiment in that the auxiliary door 3 does not include the second door leaf 32 and the third door leaf 33, and the one-way door does not include the second crank 42, the second connecting rod 6, the third crank 44 and the third connecting rod 5.

Claims

1. A one-way door, comprising: including frame (1), crank link assembly, rotate connect in main door (2), auxiliary door (3) of frame (1), crank link assembly include crank (4), articulate in connecting rod (5) of crank (4), weight increasing piece (8) are installed in crank (4), crank (4) rotate connect in frame (1), connecting rod (5) are used for driving auxiliary door (3) motion.

2. A one-way door in accordance with claim 1, wherein: the weight increasing block (8) is fixedly arranged on the crank (4) through a bolt (83) and a nut.

3. A one-way door in accordance with claim 1, wherein: the weight increasing block (8) comprises a first base body (81) and a second base body (82), the crank (4) is located between the first base body (81) and the second base body (82), and the first base body (81) and the second base body (82) are fixed through bolts (83) and nuts.

4. A one-way door according to claim 1, 2 or 3, wherein: the weight increasing block (8) is arranged at one end of the crank (4) close to the connecting rod (5).

5. A one-way door according to any one of claims 1 to 3, wherein: the rack (1) is movably provided with a pulley (12), and the connecting rod (5) is hinged with the pulley (12); the rack (1) is provided with a rotatable winding drum (13) and an elastic piece (14), the auxiliary door (3) comprises a plurality of door sheets (34) which are sequentially hinged, and the auxiliary door (3) is wound on the winding drum (13); one end of the auxiliary door (3) is fixed with the winding drum (13), and the other end of the auxiliary door is fixed with the pulley (12); the elastic piece (14) elastically drives the winding drum (13) to rotate so as to wind the auxiliary door (3).

6. A one-way door according to any one of claims 1 to 3, wherein: the auxiliary door (3) comprises a first door leaf (31), the first door leaf (31) is movably arranged on the rack (1), and the connecting rod (5) is hinged to the first door leaf (31).

7. A one-way door according to claim 6, wherein: the auxiliary door (3) further comprises a second door leaf (32), the second door leaf (32) is movably arranged on the rack (1), a first connecting column (41) is fixed on the crank (4), a second crank (42) is fixed on the first connecting column (41), the second crank (42) is hinged to a second connecting rod (6), and the second connecting rod (6) is hinged to the second door leaf (32).

8. A one-way door according to claim 7, wherein: the auxiliary door (3) further comprises a third door leaf (33), the third door leaf (33) is movably arranged on the rack (1), a second connecting column (43) is fixed on the second crank (42), a third crank (44) is fixed on the second connecting column (43), the third crank (44) is hinged to a third connecting rod (7), and the third connecting rod (7) is hinged to the third door leaf (33).

9. A one-way door in accordance with claim 1, wherein: the main door (2) comprises a main shaft (21) rotatably connected to the rack (1) and a plurality of main door leaves (22) fixed on the main shaft (21); the rack (1) is provided with a one-way device (10) for limiting the one-way rotation of the main door (2); a transmission mechanism (9) for transmitting power is arranged between the main door (2) and the crank (4) or the crank (4) is fixed on the main shaft (21).