CN211448480U - Vice door group and have one-way door of this vice door group - Google Patents

Abstract

The utility model relates to an one-way current facility technical field discloses a vice door group and has one-way door of this vice door group, and vice door group includes frame, first vice door, and first vice door includes first door leaf, end shell, connecting portion one, sets up in the connecting portion two of end shell. The utility model has the advantages of it is following and effect: the first auxiliary door comprises a first door leaf and an end shell, and a first connecting part on the first door leaf and a second connecting part on the end shell are movably arranged on the rack, so that the first auxiliary door moves stably; the vice door of second is located between the plate body of first door leaf and end shell, and the locating piece on locating piece one on the first door leaf, the locating piece on the plate body is to spacing the second door leaf, rocks about when avoiding the vice door motion of second, and is steady when making the vice door motion of second. The convex part of end shell reduces the clearance between first vice door and the main door, avoids the short and small personnel of stature to pass through one-way door in order to reverse through the clearance between first vice door and the main door.

Description

Vice door group and have one-way door of this vice door group

Technical Field

The utility model relates to an one-way current facility technical field, in particular to vice door group and have one-way door of this vice door group.

Background

The one-way door, i.e. the one-way passage door, is usually arranged at the exit of the station, so that passengers in the station can pass through the one-way passage door conveniently. Chinese patent application with application publication number CN110397381A discloses a one-way door, including frame, main door, crank set, connecting rod set, vice door group, crank set includes main crank, second crank, third crank, and connecting rod set includes first connecting rod, second connecting rod, third connecting rod, and vice door includes first vice door, second vice door and third vice door, and every crank, connecting rod drive the vice door motion that corresponds. However, the above one-way door has the following disadvantages: the upper end of the auxiliary door is connected with the frame, and the auxiliary door is easy to rock towards two sides during movement and is not stable during movement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a vice door unit has the effect of motion stationary.

The above technical purpose of the present invention can be achieved by the following technical solutions: a secondary door set comprises a rack and a first secondary door, wherein the first secondary door comprises a first door leaf, an end shell fixed on the first door leaf, a first connecting part arranged on the first door leaf and a second connecting part arranged on the end shell, the first connecting part and the second connecting part can be movably arranged on the rack, and the running track of the first connecting part is parallel to the running track of the second connecting part.

Through adopting above-mentioned technical scheme, the connecting portion one of first door leaf, the connecting portion two of end shell all can remove the setting in the frame, and the first movement track of connecting portion and the second movement track of connecting portion when first auxiliary door moves.

The utility model discloses a further set up to: the end shell comprises a plate body parallel to the first door leaf and a folded plate, one end of the folded plate is fixed on the first door leaf, and the other end of the folded plate is fixed with the plate body.

The utility model discloses a further set up to: the second connecting part is arranged on the plate body.

The utility model discloses a further set up to: and a convex part positioned in front of the end part of the first door leaf is formed after the folded plate is bent.

By adopting the technical scheme, the first door leaf moves in a reciprocating linear motion and is close to or far away from the main door of the one-way door. First door leaf end front means: in front of the first door leaf when it is moved closer to the main door, i.e. the projection is located between the first door leaf and the main door. The convex part formed after the folded plate is bent can reduce the gap between the first door leaf and the main door, and prevent short personnel from passing through the gap between the first door leaf and the main door.

The utility model discloses a further set up to: the folded plate is bent to form an inclined plane which is located on one side of the first door leaf.

By adopting the technical scheme, the inclined plane formed after the folded plate is bent reduces the gap between the end shell and the main door.

The utility model discloses a further set up to: vice door group still including portable set up in the second vice door of frame, the second vice door with first door leaf parallels, the vice door of second is located first door leaf with between the plate body.

The utility model discloses a further set up to: a first positioning block is fixed on the end face, close to the second auxiliary door, of the first door leaf, and a second positioning block is fixed on the end face, close to the second auxiliary door, of the plate body; a gap is formed between the first positioning block and the second auxiliary door or the first positioning block is abutted against the second auxiliary door; and a gap is formed between the second positioning block and the second auxiliary door or the second positioning block is abutted to the second auxiliary door.

Through adopting above-mentioned technical scheme, locating piece one, locating piece two can be inconsistent or form tiny clearance with the vice door of second, play spacingly to the vice door of second when the vice door motion of second, improve the stationarity when the vice door motion of second.

The utility model discloses a further set up to: the auxiliary door group further comprises a limiting seat fixed on the rack, and a limiting groove for the second auxiliary door to be embedded into is formed in the limiting seat.

Through adopting above-mentioned technical scheme, the vice door embedding of second is at the spacing inslot, and the stationarity when reinforcing the vice door motion of second.

The utility model discloses a further set up to: the second auxiliary door comprises a second door leaf and a third connecting part arranged on the second door leaf, the third connecting part is movably arranged on the rack and comprises a third connecting seat fixed on the second door leaf, a third connecting shaft rotatably arranged on the third connecting seat, a third roller fixed on the third connecting shaft or a third sliding block.

The utility model discloses a further set up to: the first connecting part comprises a first connecting seat fixed at the upper end of the first door leaf, a first connecting shaft rotationally arranged on the first connecting seat, and a first roller fixed on the first connecting shaft, a first sliding rail is fixed on the rack, and a first sliding groove for embedding the first roller is formed in the first sliding rail; the connecting part II comprises a connecting seat II fixed at the upper end of the end shell, a connecting shaft II rotatably arranged on the connecting seat II and a roller II fixed on the connecting shaft II, a sliding rail II is fixed on the rack, and a sliding groove II for the roller II to be embedded into is formed in the sliding rail II.

The utility model discloses a further set up to: the first rolling wheels are two in number and distributed on two sides of the first connecting seat, a first strip-shaped bulge is fixed on the first sliding rail, and a first groove for embedding the first strip-shaped bulge is formed in the circumferential side wall of the first rolling wheel; the two idler wheels are distributed on two sides of the second connecting seat, the second sliding rail is fixed with a second strip-shaped protrusion, and a second groove for the second strip-shaped protrusion to be embedded into is formed in the side wall of the circumference of the second idler wheel.

The utility model discloses a further set up to: the first connecting part comprises a first sliding block fixed with the first door leaf, the second connecting part comprises a second sliding block fixed with the end shell, the first sliding block is connected with the first guide rail in a sliding mode, and the second sliding block is connected with the second guide rail in a sliding mode.

Another object of the utility model is to provide an one-way door, including rotate set up in the main door of frame, rotate set up in frame and linkage in the input shaft of main door, the input shaft is fixed with the main crank, the main crank articulates there is first connecting rod, first connecting rod is kept away from main crank's one end with first secondary door is articulated mutually.

The utility model discloses a further set up to: the main crank is fixed with a second crank, the second crank is hinged with a second connecting rod, and one end of the second connecting rod, which is far away from the second crank, is hinged with the second auxiliary door.

The utility model has the advantages that: the first auxiliary door comprises a first door leaf and an end shell, and a first connecting part on the first door leaf and a second connecting part on the end shell are movably arranged on the rack, so that the first auxiliary door moves stably; the vice door of second is located between the plate body of first door leaf and end shell, and the locating piece on locating piece one on the first door leaf, the locating piece on the plate body is to spacing the second door leaf, rocks about when avoiding the vice door motion of second, and is steady when making the vice door motion of second. The convex part of end shell reduces the clearance between first vice door and the main door, avoids the short and small personnel of stature to pass through one-way door in order to reverse through the clearance between first vice door and the main door.

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 described 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 without creative efforts.

FIG. 1 is a schematic structural view of example 1.

Fig. 2 is a schematic structural view of the main door, main crank, secondary crank, and sub-door set according to embodiment 1.

Fig. 3 is a schematic view of the positional relationship among the main crank, the secondary crank, the first connecting portion, the second connecting portion, and the third connecting portion in embodiment 1.

Fig. 4 is a schematic view of the positional relationship between the first sub-door and the second sub-door in embodiment 1.

Fig. 5 is a schematic view of the structure of the sub-door group of embodiment 1.

Fig. 6 is a schematic structural view between the stopper seat and the second sub-door in embodiment 1.

Fig. 7 is a schematic structural diagram of a first connection portion, a second connection portion, and a third connection portion in embodiment 1.

Fig. 8 is a schematic view of a positional relationship among the first connecting portion, the second connecting portion, the third connecting portion, the first slide rail, the second slide rail, and the third slide rail in embodiment 1.

Fig. 9 is a schematic view of the structure of the unidirectional device of embodiment 1.

Fig. 10 is a schematic view of the positional relationship between the first sub-door and the second sub-door in embodiment 2.

Fig. 11 is a schematic view of the structure of the sub-door group of embodiment 2.

Fig. 12 is a schematic structural view of a first connection portion, a second connection portion, and a third connection portion in embodiment 2.

Fig. 13 is a schematic structural view of a first connection portion, a second connection portion, and a third connection portion in embodiment 4.

In the figure, 1, a frame; 11. a first slide rail; 111. a first sliding chute; 112. a first strip-shaped bulge; 12. a second slide rail; 121. a second chute; 122. a second strip-shaped bulge; 13. a third slide rail; 131. a third chute; 132. a strip-shaped bulge III; 14. a first guide rail; 15. a second guide rail; 16. a third guide rail; 17. a limiting seat; 171. a limiting groove; 2. a main door; 21. a main shaft; 211. a drive gear; 22. rotating the door leaf; 3. a first sub-door; 31. a first door leaf; 311. a first positioning block; 32. an end shell; 321. a plate body; 3211. a second positioning block; 322. folding the plate; 323. a convex portion; 324. a bevel; 33. a first connecting part; 331. a first connecting seat; 3311. a first hinge shaft; 332. a first connecting shaft; 333. a first roller; 3331. a first groove; 334. a first sliding block; 3341. a third hinge shaft; 34. a second connecting part; 341. a second connecting seat; 342. a second connecting shaft; 343. a second roller; 3431. a second groove; 344. a second sliding block; 4. a second sub-door; 41. a second door leaf; 42. a connecting part III; 421. a third connecting seat; 4211. a second hinge shaft; 422. a third connecting shaft; 423. a third roller; 4231. a third groove; 424. a third sliding block; 4241. a fourth hinge shaft; 5. an input shaft; 51. a driven gear; 6. a main crank; 61. a first link; 7. a second crank; 71. a second link; 8. a channel; 9. a one-way device; 91. installing a shaft; 92. a one-way bearing; 93. a one-way gear.

Detailed Description

The technical solution of the present invention will be clearly and completely described below with reference to the specific embodiments. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1: a one-way door, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, comprises a frame 1, a main door 2 and an auxiliary door group which are rotatably arranged on the frame 1, wherein a passage 8 is formed in the frame 1 for passengers to pass through. The main door 2 is positioned in the channel 8, and the main door 2 comprises a main shaft 21 rotatably connected to the frame 1 and three rotary door leaves 22 fixed on the main shaft 21. The auxiliary door group comprises a first auxiliary door 3 and a second auxiliary door 4, wherein the first auxiliary door 3 comprises a first door leaf 31, an end shell 32 fixed on the first door leaf 31, a first connecting part 33 arranged at the upper end of the first door leaf 31, and a second connecting part 34 arranged at the upper end of the end shell 32. The end shell 32 includes a plate 321 and a folded plate 322, the plate 321 is parallel to the first door leaf 31, one end of the folded plate 322 is fixed on the first door leaf 31, the other end of the folded plate is fixed on the plate 321, and the middle of the folded plate 322 is bent for multiple times. The folded plate 322 is bent to form a protruding portion 323, the direction of the first door 31 toward the main door 2 is forward, and the protruding portion 323 is located forward of one end of the first door 31 close to the main door 2 main shaft 21, that is, the protruding portion 323 is located between the end of the first door 31 and the main door 2. The convex portion 323 reduces the gap between the first door 31 and the main door 2, and prevents short persons from passing through the gap between the first door 31 and the main door 2.

As shown in fig. 5, 6, 7, and 8, the first connecting portion 33 includes a first connecting seat 331 fixed at the upper end of the first door leaf 31, a first connecting shaft 332 rotatably connected to the first connecting seat 331, and two first rollers 333 fixed at two ends of the first connecting shaft 332, the first connecting shaft 332 is horizontally disposed, the number of the first connecting shafts 332 is two, and the two first rollers 333 at two ends of each first connecting shaft 332 are distributed at two sides of the first connecting seat 331. The rack 1 is fixed with a first sliding rail 11, and the first sliding rail 11 is provided with a first sliding groove 111 for embedding a first roller 333. The first slide rail 11 is fixedly provided with a first strip-shaped protrusion 112, and the circumferential side wall of the first roller 333 is provided with a first groove 3331. The first roller 333 is positioned in the first sliding groove 111, and the first strip-shaped protrusion 112 is embedded in the first groove 3331.

As shown in fig. 5, 6, 7 and 8, the second connecting portion 34 includes a second connecting seat 341 fixed at the upper end of the plate body 321, a second connecting shaft 342 rotatably connected to the second connecting seat 341, and two second rollers 343 fixed at two ends of the second connecting shaft 342, the second connecting shaft 342 is horizontally disposed, the number of the second connecting shafts 342 is two, and the two second rollers 343 at two ends of each second connecting shaft 342 are distributed at two sides of the second connecting seat 341. The second sliding rail 12 is fixed on the frame 1, and the second sliding rail 12 is provided with a second sliding chute 121 for the second roller 343 to be embedded into. The slide rail is fixed with a second strip-shaped protrusion 122, and the circumferential side wall of the second roller 343 is provided with a second groove 3431. The second roller 343 is located in the second sliding groove 121, and the second strip-shaped protrusion 122 is embedded in the second groove 3431.

As shown in fig. 5, 6, 7, and 8, the second sub-door 4 includes a second door 41 and a third connecting portion 42 disposed at an upper end of the second door 41, the second door 41 is parallel to the first door 31, and the second door 41 is located between the first door 31 and the plate 321. A plurality of first positioning blocks 311 are fixed on the end surface of the first door leaf 31 close to the second door leaf 41. A plurality of second positioning blocks 3211 are fixed on the end surface of the plate 321 close to the second door leaf 41. The first positioning block 311 and the second positioning block 3211 both abut against the second door 41, so that the stability of the second door 41 in the movement process is enhanced. The limiting seat 17 is fixed on the frame 1, the limiting groove 171 is formed in the limiting seat 17, the lower end of the second door leaf 41 is embedded into the limiting groove 171, the limiting groove 171 in the limiting seat 17 can limit the second door leaf 41, the rocking of the second door leaf 41 to two sides in the moving process is reduced, and the moving stability of the second door leaf 41 is enhanced.

As shown in fig. 5, 6, 7, and 8, the connecting portion three 42 includes a connecting seat three 421 fixed to the upper end of the second door leaf 41, a connecting shaft three 422 rotatably connected to the connecting seat three 421, and two roller three 423 fixed to two ends of the connecting shaft three 422, the connecting shaft three 422 is horizontally disposed, the number of the connecting shaft three 422 is two, and the two roller three 423 at two ends of each connecting shaft three 422 are distributed on two sides of the connecting seat three 421. The rack 1 is fixed with a third sliding rail 13, and the third sliding rail is provided with a third sliding chute 131 for embedding the third roller 423. The slide rail is fixed with a strip-shaped protrusion III 132, and the circumferential side wall of the roller III 423 is provided with a groove III 4231. The roller three 423 is positioned in the sliding groove three 131, and the strip-shaped protrusion three 132 is embedded into the groove three 4231.

As shown in fig. 1, 2 and 3, the frame 1 is rotatably connected with an input shaft 5, and the input shaft 5 and the main shaft 21 are both vertically arranged. A driven gear 51 is fixed to the input shaft 5, a drive gear 211 is fixed to the main shaft 21, and the drive gear 211 meshes with the driven gear 51. The input shaft 5 is fixed with a main crank 6, the main crank 6 is provided with a fixed shaft and a first connecting rod 61, the fixed shaft is fixed with the main crank 6, the first connecting rod 61 is provided with a hinge hole, and the fixed shaft penetrates through the hinge hole and is in clearance fit, so that the main crank 6 is hinged with the first connecting rod 61. The first connecting portion 33 further includes a first hinge shaft 3311 fixed to the first connecting seat 331, and the first connecting rod 61 is hinged to the first hinge shaft 3311. The fixed shaft is fixed with a second crank 7, and the second crank 7 is higher than the main crank 6 and the first connecting rod 61. The second crank 7 is articulated with a second connecting rod 71. The connecting portion third 42 further includes a hinge shaft second 4211 fixed to the connecting seat third 421, and the second link 71 is hinged to the hinge shaft second 4211.

As shown in fig. 9, the frame 1 is provided with a one-way device 9 for limiting the one-way rotation of the main door 2, the one-way device 9 includes a mounting shaft 91 fixed to the frame 1, a one-way bearing 92 mounted on the mounting shaft 91, and a one-way gear 93 mounted on an outer ring of the one-way bearing 92, and the one-way gear 93 is engaged with the driving gear 211. The unidirectional rotation of the unidirectional bearing 92 limits the unidirectional rotation of the unidirectional gear 93, and further limits the unidirectional rotation of the main door 2, and prevents passengers from pushing the main door 2 to rotate reversely to pass through the unidirectional door.

The working principle of the one-way door is as follows: the passenger enters the passageway 8 and pushes the main door 2 to rotate to pass through the one-way door. The main shaft 21 of the main door 2 drives the driven gear 51 and the input shaft 5 to rotate through the driving gear 211, the main crank 6 on the input shaft 5 drives the first auxiliary door 3 to reciprocate through the first connecting rod 61, and the second crank 7 drives the second auxiliary door 4 to reciprocate through the second connecting rod 71. When the sub-door group is located between the two revolving door leaves 22 of the main door 2, the first sub-door 3 is in a position closest to the main axis 21 of the main door 2; the main door 2 continues to rotate, the first auxiliary door 3 and the second auxiliary door 4 are far away from the main shaft 21 of the main door 2, and after the rotating door leaf 22 of the main door 2 passes through, the first auxiliary door 3 and the second auxiliary door 4 are close to the main shaft 21 of the main door 2 again. Through the setting of vice door group, play the effect that the separation passenger passes through the unidirectional door along with main door 2 rotation reversal.

Example 2: a one-way door, which is different from embodiment 1 in that, as shown in fig. 10, 11 and 12, a folded plate 322 is bent to form a slope 324, and the slope 324 is located at one side of a first door leaf 31, so that a gap between an end shell 32 and a rotary door leaf 21 of a main door 2 can be reduced.

Example 3: a one-way door is different from the embodiment 1 in that a small gap is formed among a first positioning block 311, a second positioning block 3211 and a second door leaf 41, and the movement of the second door leaf 41 is limited.

Example 4: a one-way door, which is different from embodiment 1 in that, as shown in fig. 13, a first connecting part 33 includes a first slider 334 fixed to a first sub-door 3, and a third hinge shaft 3341 fixed to the first slider 334, a first guide rail 14 is fixed to a frame 1, and the first slider 334 is slidably connected to the first guide rail 14. The second connecting portion 34 includes a second slider 344 fixed to the plate 321, the second guide rail 15 is fixed to the frame 1, and the second slider 344 is slidably connected to the second guide rail 15. The connecting portion three 42 includes a slider three 424 fixed to the second door leaf 41, and a hinge shaft four 4241 fixed to the slider three 424. The frame 1 is fixed with a first connecting rod 61 hinged with a third hinged shaft 3341, and a second connecting rod 71 hinged with a fourth hinged shaft 4241.

Claims (14)

1. A set of sub-doors, comprising: the first auxiliary door (3) comprises a first door leaf (31), an end shell (32) fixed on the first door leaf (31), a first connecting part (33) arranged on the first door leaf (31) and a second connecting part (34) arranged on the end shell (32), wherein the first connecting part (33) and the second connecting part (34) can be movably arranged on the rack (1), and the running track of the first connecting part (33) is parallel to the running track of the second connecting part (34).

2. A sub-door group according to claim 1, wherein: the end shell (32) comprises a plate body (321) parallel to the first door leaf (31) and a folded plate (322) with one end fixed to the first door leaf (31) and the other end fixed to the plate body (321).

3. A sub-door group according to claim 2, wherein: the second connecting part (34) is arranged on the plate body (321).

4. A sub-door group according to claim 2, wherein: a convex part (323) positioned in front of the end part of the first door leaf (31) is formed after the folded plate (322) is bent.

5. A sub-door group according to claim 2, wherein: the folded plate (322) is bent to form an inclined surface (324) which is positioned at one side of the first door leaf (31).

6. A sub-door group according to claim 2, wherein: the auxiliary door group further comprises a second auxiliary door (4) movably arranged on the rack (1), the second auxiliary door (4) is parallel to the first door leaf (31), and the second auxiliary door (4) is located between the first door leaf (31) and the plate body (321).

7. A sub-door group according to claim 6, wherein: a first positioning block (311) is fixed on the end face, close to the second auxiliary door (4), of the first door leaf (31), and a second positioning block (3211) is fixed on the end face, close to the second auxiliary door (4), of the plate body (321); a gap is formed between the first positioning block (311) and the second auxiliary door (4) or the first positioning block (311) is abutted against the second auxiliary door (4); a gap is formed between the second positioning block (3211) and the second auxiliary door (4) or the second positioning block (3211) is abutted against the second auxiliary door (4).

8. A sub-door group according to claim 6, wherein: the auxiliary door set further comprises a limiting seat (17) fixed on the rack (1), and a limiting groove (171) for the second auxiliary door (4) to be embedded into is formed in the limiting seat (17).

9. A sub-door group according to claim 6, wherein: the second auxiliary door (4) comprises a second door leaf (41) and a third connecting part (42) arranged on the second door leaf (41), the third connecting part (42) can be movably arranged on the rack (1), the third connecting part (42) comprises a third connecting seat (421) fixed on the second door leaf (41), a third connecting shaft (422) rotatably arranged on the third connecting seat (421), and a third roller (423) fixed on the third connecting shaft (422), or the third connecting part (42) comprises a third slider (424).

10. A sub-door group according to claim 1, wherein: the first connecting part (33) comprises a first connecting seat (331) fixed at the upper end of the first door leaf (31), a first connecting shaft (332) rotatably arranged on the first connecting seat (331), and a first roller (333) fixed on the first connecting shaft (332), the rack (1) is fixed with a first sliding rail (11), and the first sliding rail (11) is provided with a first sliding groove (111) for embedding the first roller (333); the second connecting part (34) comprises a second connecting seat (341) fixed at the upper end of the end shell (32), a second connecting shaft (342) rotatably arranged on the second connecting seat (341), and a second roller (343) fixed on the second connecting shaft (342), the rack (1) is fixed with a second sliding rail (12), and the second sliding rail (12) is provided with a second sliding groove (121) for embedding the second roller (343).

11. A sub-door group according to claim 10, wherein: the first rollers (333) are two in number and distributed on two sides of the first connecting seat (331), the first sliding rail (11) is fixedly provided with a first strip-shaped protrusion (112), and the circumferential side wall of the first rollers (333) is provided with a first groove (3331) for embedding the first strip-shaped protrusion (112); the number of the second rollers (343) is two, the second rollers are distributed on two sides of the second connecting seat (341), the second sliding rail (12) is fixed with a second strip-shaped protrusion (122), and a second groove (3431) for the second strip-shaped protrusion (122) to be embedded into is formed in the circumferential side wall of the second rollers (343).

12. A sub-door group according to claim 1, wherein: the frame (1) is fixed with a first guide rail (14) and a second guide rail (15), the first connecting part (33) comprises a first sliding block (334) fixed with the first door leaf (31), the second connecting part (34) comprises a second sliding block (344) fixed with the end shell (32), the first sliding block (334) is in sliding connection with the first guide rail (14), and the second sliding block (344) is in sliding connection with the second guide rail (15).

13. A one-way door having a set of sub-doors according to any of claims 1 to 12, wherein: including rotate set up in main door (2), the rotation of frame (1) set up in frame (1) and link in input shaft (5) of main door (2), input shaft (5) are fixed with main crank (6), main crank (6) articulate there is first connecting rod (61), keep away from first connecting rod (61) the one end of main crank (6) with first auxiliary door (3) are articulated mutually.

14. A one-way door according to claim 13, wherein: a second crank (7) is fixed on the main crank (6), the second crank (7) is hinged to a second connecting rod (71), and one end, far away from the second crank (7), of the second connecting rod (71) is hinged to the second auxiliary door (4).

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