CN211258685U - Air door opening and closing device for mine passage - Google Patents

Abstract

The utility model provides an air door switching device for on mine road, include support (1) of setting in the orbital side portion of mine car, set up to a rotary drum (2) with support (1) rotary type hookup, the setting is between rotary drum (2) and support (1) and be used for torsion spring (8) of rotary drum (2) return, the setting is between rotary drum (2) and air door and set up to the folding arm device with the hookup of mine car contact, through support (1), rotary drum (2) and torsion spring (8), realize folding arm device and draw in and extend, through folding arm device, realize the switching of air door, no longer all need the manual work to open and the air door is just directly bumped open with the mine car, consequently, the efficiency of transportation and the sealing performance of air door have been improved.

Description

Air door opening and closing device for mine passage

Technical Field

The utility model relates to an air door switching device, especially an air door switching device for on ore deposit way.

Background

When the colliery is transported in the pit, the mine car will be through a lot of air doors sometimes, therefore an air door switching device for on the mine road is an important mining device, in the current air door switching device for on the mine road, every air door all needs the manual work to open, and is very loaded down with trivial details, not only wastes time and energy, has influenced the efficiency of transportation in addition, when can not in time open the air door in addition, the mine car just directly bumps open the air door, has caused the damage of air door to the sealing performance of air door has been influenced.

Disclosure of Invention

The object of the utility model is an air door switching device for mine road.

In order to overcome the technical defect, the utility model aims at providing an air door switching device for on the mine road, consequently improved the efficiency of transportation and the sealing performance of air door.

In order to achieve the purpose, the utility model adopts the technical proposal that: the mine car turning device comprises a support arranged on the side part of a mine car track, a turning cylinder arranged to be in rotary connection with the support, a torsion spring arranged between the turning cylinder and the support and used for returning the turning cylinder, and a folding arm device arranged between the turning cylinder and an air door and arranged to be in contact connection with a mine car.

Because the support, the rotating cylinder, the torsion spring and the folding arm device are designed, the folding arm device is folded and extended through the support, the rotating cylinder and the torsion spring, the air door is opened and closed through the folding arm device, the air door is not required to be opened manually and the mine car directly collides with the air door, and therefore the transportation efficiency and the sealing performance of the air door are improved.

The utility model discloses a, realize the mode of the switching of air door according to link mechanism's motion and couple support, rotary drum, torsion spring and folding arm device each other.

The utility model discloses a, according to two link mechanism draw in and extend the mode of realizing the switching of air door and couple folding arm device and support, a rotating cylinder and torsion spring.

The utility model relates to a, wherein, have catch bar, swinging arms and folding rod's folding arm device.

The utility model discloses a, still include the first annex device that has the connecting rod and first annex device sets up on folding arm device.

The utility model discloses a, still include the second annex device that has the connection pad and second annex device sets up between folding arm device and air door.

The utility model discloses a, the support setting is in the orbital side portion of mine car, rotates a section of thick bamboo setting on the support and be provided with the torsion spring rotating between a section of thick bamboo and support, and catch bar and swinging arms setting are rotating a section of thick bamboo and be provided with the connecting rod between catch bar and swinging arms, and the connection pad setting is on the air door and be provided with the folding rod between connection pad and swinging arms.

The utility model discloses a, the support sets up to including seat and axial region and the upper end face portion of seat sets up to hookup with axial region and torsion spring, and the seat sets up in the orbital side portion of mine car and the seat sets up to hookup with the ground implantation, and the axial region sets up to hookup and the seat sets up to the rectangular column body with the rotor rotary type, and the axial region sets up to the circular rod body.

The utility model discloses a, it sets up to circular siphonozooid and rotates a section of thick bamboo and set up to hookup through bearing and support to rotate a section of thick bamboo, rotates a section of thick bamboo and sets up respectively to hookup with catch bar, swinging arms and torsion spring for linking with torsion spring run through the string formula and the lateral surface portion that rotates a section of thick bamboo.

The utility model discloses a, torsion spring set up to with the support cup joint formula hookup and one of them end of torsion spring set up to with rotate a hookup, wherein another end of torsion spring set up to with the support hookup.

The utility model discloses a, the catch bar sets up to including first pole portion, second pole portion and third pole portion and one of them end of first pole portion and third pole portion set up respectively to hookup with a rotating cylinder, wherein another end of first pole portion sets up to hookup with one of them end of second pole portion and wherein another end of second pole portion sets up to hookup with one of them end of third pole portion, first pole portion, second pole portion and third pole portion set up respectively to circular rod-shaped body and first pole portion, second pole portion and third pole portion set up to be triangular distribution, wherein another end of first pole portion sets up to extend to the mine car track and the intermediate part of first pole portion sets up to hookup with the connecting rod.

The utility model discloses a, one of them end of swinging arms sets up to and rotates a hookup and wherein another end of swinging arms sets up to hookup through round pin axle and folding rod, and the intermediate part of swinging arms sets up to and links and the swinging arms sets up to the rectangular beam-shaped body with the connecting rod.

The utility model discloses a, the connecting rod sets up to rectangle strip and one of them end of connecting rod sets up to hookup with the catch bar, and one of them other end of connecting rod sets up to hookup with the swinging arms.

The utility model discloses a, the folding rod sets up to the rectangle roof beam body that the end has two connection ear seats and the two connection ear seats of one of them end of folding rod set up to be through round pin axle and swinging arms hookup, and the two connection ear seats of one of them end of folding rod set up to be through round pin axle and connection pad hookup.

The utility model discloses a, the connection pad sets up to the partly of disc and be provided with the round pin axle hole body on the connection pad, and the plane portion of connection pad sets up to coupleing and the round pin axle hole body of connection pad sets up to coupleing through round pin axle and folding rod with the air door.

The utility model discloses a, the support, rotate a section of thick bamboo and torsion spring and catch bar, the swinging arms, folding rod and connection pad set up to distribute according to the mode of folding switching and catch bar and swinging arms and connecting rod set up to distribute according to the mode of triangle-shaped frame, first pole portion, second pole portion and third pole portion set up to distribute according to obtuse triangle-shaped and catch bar, swinging arms and connecting rod set up to distribute according to acute triangle-shaped, it sets up at by first pole portion to rotate a section of thick bamboo, on one of them bight of obtuse triangle-shaped that second pole portion and third pole portion are constituteed and by the catch bar, on one of them bight of acute triangle-shaped that swinging arms and connecting rod are constituteed.

The technical effects of the utility model reside in that: the device is composed of a round wheel, a cement buttress, a triangular collision rod, a stay bar, a guide rod and the like, the device utilizes a lever principle, the impact force of a mine car is transmitted to the guide rod through the transmission of a connecting rod lever, an air door is opened along the force of the guide rod, the device fixes the round wheel on the cement buttress, then a device of the triangular collision rod is manufactured by flat iron or an iron pipe, the triangular collision rod is fixed on a rotating wheel through a screw, then the collision rod device is fixedly connected with the stay bar, the stay bar is connected with the guide rod, the guide rod is connected on an air door leaf, and thus, the rotating wheel drives a pull rod connected with the air door to rotate through the impact of the mine car on the collision rod device, so that the automatic opening of the. The air door is opened by the impact of the mine car on the impact rod device, so that a manual door opening procedure is omitted, and the impact acting force of the impact rod device opens the air door when the locomotive or the mine car is out of control, so that the locomotive or the mine car passes through the air door and cannot be damaged.

In this technical scheme, support, a rotation section of thick bamboo and torsion spring are basic unit, also the utility model discloses a necessary technical feature, catch bar, swinging arms, connecting rod, folding rod and connection pad are functional unit, are the realization the utility model discloses a characteristic of other technological effects, the design of seat, axial region, first pole portion, second pole portion and these technical features of third pole portion are the technical feature who accords with the patent law and implement the rule.

In the technical scheme, a support, a rotating cylinder, a torsion spring and a folding arm device for realizing the opening and closing of the air door by the movement of the link mechanism are important technical characteristics, and have novelty, creativity and practicability in the technical field of the air door opening and closing device used on a mine, and terms in the technical scheme can be explained and understood by patent documents in the technical field.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Figure 1 is a schematic view of the present invention,

the device comprises a support seat-1, a rotating cylinder-2, a push rod-3, a swinging rod-4, a connecting rod-5, a folding rod-6, a connecting disk-7, a torsion spring-8, a seat part-11, a shaft part-12, a first rod part-31, a second rod part-32 and a third rod part-33.

Detailed Description

Terms such as "having," "including," and "comprising," as used herein with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other, and unless otherwise specified, the devices and materials used in the following examples are commercially available, and if the processing conditions are not explicitly stated, please refer to the purchased product specification or follow the conventional method in the art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is a first embodiment of the present invention, which is specifically described with reference to the accompanying drawings, and includes a support 1, a rotating cylinder 2, a pushing rod 3, a swing rod 4, a connecting rod 5, a folding rod 6, a connecting disc 7 and a torsion spring 8, wherein the support 1 is disposed on a side portion of a mine car track, the rotating cylinder 2 is disposed on the support 1 and the torsion spring 8 is disposed between the rotating cylinder 2 and the support 1, the pushing rod 3 and the swing rod 4 are disposed on the rotating cylinder 2 and the connecting rod 5 is disposed between the pushing rod 3 and the swing rod 4, the connecting disc 7 is disposed on an air door and the folding rod 6 is disposed between the connecting disc 7 and the swing rod 4.

In the present embodiment, the stand 1 is configured to include the seat portion 11 and the shaft portion 12 and the upper end surface portion of the seat portion 11 is configured to be coupled with the shaft portion 12 and the torsion spring 8, the seat portion 11 is configured to be provided at the side surface portion of the track of the mining vehicle and the seat portion 11 is configured to be coupled with the foundation in an embedded manner, the shaft portion 12 is configured to be coupled with the rotary cylinder 2 in a rotatable manner and the seat portion 11 is configured to be a rectangular column-shaped body, and.

Through support 1, the support connection point to rotary drum 2 and torsion spring 8 has been formed, by shaft portion 12, has realized linking with rotary drum 2, by seat 11, has realized linking with torsion spring 8, its technical aim at: for serving as a support body for the rotary cylinder 2 and the torsion spring 8.

In the present embodiment, the rotary cylinder 2 is provided as a circular tubular body and the rotary cylinder 2 is provided to be coupled with the mount 1 through a bearing, the rotary cylinder 2 is provided to be coupled with the torsion spring 8 in a cross-over manner and the outer side surface portion of the rotary cylinder 2 is provided to be coupled with the push rod 3, the swing rod 4 and the torsion spring 8, respectively.

Through rotating a section of thick bamboo 2, formed the support tie point to support 1, catch bar 3, swinging arms 4 and torsion spring 8, by rotating a section of thick bamboo 2, realized linking with support 1, realized linking with catch bar 3, realized linking with swinging arms 4, realized linking with torsion spring 8, its technical aim at: for acting as a rotating sleeve for the push rod 3 and the oscillating rod 4.

In the present embodiment, the torsion spring 8 is provided to be coupled with the bracket 1 in a socket manner and one end of the torsion spring 8 is provided to be coupled with the rotary tube 2 and the other end of the torsion spring 8 is provided to be coupled with the bracket 1.

Through torsion spring 8, formed the support tie point to support 1 and a section of thick bamboo 2 of rotating, by torsion spring 8, realized linking with support 1, realized linking with a section of thick bamboo 2 of rotating, its technical aim at: used as a return elastic energy storage component of the rotating cylinder 2.

In this embodiment, the push rod 3 is configured to include a first rod portion 31, a second rod portion 32, and a third rod portion 33, and one end of the first rod portion 31 and one end of the third rod portion 33 are respectively configured to be coupled to the rotary cylinder 2, the other end of the first rod portion 31 is configured to be coupled to one end of the second rod portion 32 and the other end of the second rod portion 32 is configured to be coupled to the other end of the third rod portion 33, the first rod portion 31, the second rod portion 32, and the third rod portion 33 are respectively configured as a circular rod-shaped body and the first rod portion 31, the second rod portion 32, and the third rod portion 33 are configured to be distributed in a triangle, the other end of the first rod portion 31 is configured to extend onto the track of the mine car and the middle portion of the first rod portion 31 is configured to be coupled to the connecting rod 5.

Through catch bar 3, formed the support connection point to revolving drum 2 and connecting rod 5, by first pole portion 31 and third pole portion 33, realized linking with revolving drum 2, by first pole portion 31, realized linking with connecting rod 5, by second pole portion 32, realized the contact with the mine car, its technical aim lies in: for driving the oscillating lever 4 to rotate.

In the present embodiment, one of the ends of the swing lever 4 is provided to be coupled to the rotary cylinder 2 and the other end of the swing lever 4 is provided to be coupled to the folding lever 6 through a pin, the intermediate portion of the swing lever 4 is provided to be coupled to the connecting rod 5 and the swing lever 4 is provided as a rectangular beam-like body.

Through swinging arms 4, the support tie point to a rotary drum 2, a connecting rod 5 and a folding rod 6 is formed, and by swinging arms 4, the connection with rotary drum 2 is realized, the connection with connecting rod 5 is realized, the connection with folding rod 6 is realized, and the technical aim is that: for generating a pushing force on the folding bar 6.

In the present embodiment, the connecting rod 5 is provided as a rectangular bar-shaped body and one end of the connecting rod 5 is provided to be coupled with the push lever 3, and the other end of the connecting rod 5 is provided to be coupled with the swing lever 4.

Through connecting rod 5, formed the support tie point to catch bar 3 and swinging arms 4, by connecting rod 5, realized linking with catch bar 3, realized linking with swinging arms 4, its technical aim at: for a reinforced connection between the push rod 3 and the oscillating rod 4.

In the present embodiment, the folding bar 6 is configured as a rectangular beam-shaped body having a double connection lug at one end thereof and the double connection lug at one end of the folding bar 6 is configured to be coupled with the swing lever 4 by a pin, and the double connection lug at the other end of the folding bar 6 is configured to be coupled with the connection pad 7 by a pin.

Through folding rod 6, formed the support tie point to swinging arms 4 and connection pad 7, by folding rod 6, realized linking with swinging arms 4, realized linking with connection pad 7, its technical aim at: used for driving the air door to open and close.

In the present embodiment, the connection pad 7 is provided as a part of the disk and a pin hole body is provided on the connection pad 7, a planar portion of the connection pad 7 is provided to be coupled with the damper and the pin hole body of the connection pad 7 is provided to be coupled with the folding bar 6 through a pin.

Through connection pad 7, formed the support connection point to folding rod 6, by connection pad 7, realized linking with folding rod 6, its technical aim at: for use as a hinge plate for a damper.

In the present embodiment, the holder 1, the rotary cylinder 2, the torsion spring 8, the push lever 3, the swing lever 4, the folding lever 6, and the connecting plate 7 are arranged to be distributed in a folded open-close manner and the push lever 3, the swing lever 4, the folding lever 6, and the connecting rod 5 are arranged to be distributed in a triangular frame manner, the first lever portion 31, the second lever portion 32, and the third lever portion 33 are arranged to be distributed in an obtuse triangle and the push lever 3, the swing lever 4, and the connecting rod 5 are arranged to be distributed in an acute triangle, and the rotary cylinder 2 is arranged at one of the corners of the obtuse triangle composed of the first lever portion 31, the second lever portion 32, and the third lever portion 33 and at one of the corners of the acute triangle composed of the push lever 3, the swing lever 4.

When the mine car runs on the track and needs to pass through the air door, the front end of the mine car is in contact with the second rod part 32, the front end of the mine car applies clockwise rotation driving force to the second rod part 32, the first rod part 31 drives the rotating cylinder 2 to rotate clockwise, the rotating cylinder 2 overcomes the elastic energy storage of the torsion spring 8, so that the swinging rod 4 rotates clockwise, when the second rod part 32 contacts with the side part of the mine car, the swinging rod 4 rotates to the limit position, so that the folding rod 6 is folded towards the swinging rod 4, the folding rod 6 opens the air door through the connecting disc 7, so that the mine car passes through the air door, after the mine car passes through the air door, the second rod part 32 is not contacted with the side part of the mine car, under the action of elastic energy storage of the torsion spring 8, the rotating cylinder 2 is driven to rotate anticlockwise, the swinging rod 4 is driven to rotate anticlockwise, the folding rod 6 and the swinging rod 4 are unfolded, and the folding rod 6 closes the air door through the connecting disc 7.

The second embodiment of the present invention is to connect the support 1, the rotary cylinder 2, the torsion spring 8 and the folding arm device to each other in such a manner that the opening and closing of the damper is realized by the movement of the link mechanism.

In this embodiment, the folding arm device is coupled to the support 1, the rotary cylinder 2 and the torsion spring 8 in such a manner that the folding and unfolding of the double link mechanism effects the opening and closing of the damper.

In the present embodiment, among others, a folding arm arrangement with a push rod 3, a swing rod 4 and a folding rod 6.

In this embodiment, a first attachment device with a connecting rod 5 is also included and is arranged on the folding arm device.

In this embodiment, a second attachment device having a connecting disc 7 is also included and is disposed between the folding arm device and the damper.

A second embodiment of the present invention is based on the first embodiment,

the utility model has the characteristics of down:

1. due to the design of the support 1, the rotating cylinder 2, the torsion spring 8 and the folding arm device, the folding arm device is folded and extended through the support 1, the rotating cylinder 2 and the torsion spring 8, the air door is opened and closed through the folding arm device, manual opening and direct collision of the air door with a mine car are not needed any more, and therefore the transportation efficiency and the sealing performance of the air door are improved.

2. Due to the design of the push rod 3, the swing rod 4 and the folding rod 6, an L-shaped bent rod is formed, and the air door is driven to be opened and closed.

3. Due to the design of the connecting rod 5, a reinforced connection between the push rod 3 and the oscillating rod 4 is achieved.

4. Due to the design of the connecting disc 7, the hinge joint with the air door is realized.

5. The first rod part 31, the second rod part 32 and the third rod part 33 are designed, so that the collision strength with the mine car is improved.

6. Owing to designed the utility model discloses a technical characteristic, in technical characteristic's the effect alone and mutual set, through experimental demonstration, the utility model discloses an each item performance index is 1.7 times at least for current each item performance index, has fine market value through the aassessment.

Still other technical features of the support 1, the rotary cylinder 2, the torsion spring 8 and the folding arm device which are connected with the link mechanism to move the damper to open and close are all one of the embodiments of the present invention, and the technical features of the above-mentioned embodiments can be combined arbitrarily, and in order to meet the requirements of patent laws, patent practice rules and examination guidelines, all possible combinations of the technical features of the above-mentioned embodiments will not be described.

Therefore in being used for the air door switching device technical field on the mine road, all include the support 1 that sets up in the orbital side portion of mine car, set up to 2, the torsion spring 8 that sets up between a 2 and support 1 and be used for rotating the 2 returns of a section of thick bamboo, set up between a 2 and the air door of a section of thick bamboo and set up to the folding arm device with the hookup of mine car contact with the rotary drum of hookup with the 1 rotary type of support technical content all be in the protection scope of the utility model.

Claims (9)

1. The utility model provides an air door switching device for on ore deposit way which characterized by: include setting up support (1) at the orbital side portion of mine car, set up to rotating a section of thick bamboo (2) with support (1) rotary type hookup, set up between rotating a section of thick bamboo (2) and support (1) and be used for rotating torsion spring (8) of a section of thick bamboo (2) return, set up between a section of thick bamboo (2) and the air door and set up to the folding arm device with the hookup of mine car contact.

2. The opening and closing device for the damper for the mine shaft according to claim 1, wherein: wherein, the folding arm device is arranged to comprise a push rod (3), a swinging rod (4) and a folding rod (6).

3. The opening and closing device for the damper for the mine shaft according to claim 2, wherein: also included is a first attachment device having a connecting rod (5) and the first attachment device is disposed on the folding arm device.

4. The opening and closing device for the damper for the mine shaft according to claim 3, wherein: a second attachment device having a connecting plate (7) is also included and is disposed between the folding arm device and the damper.

5. The opening and closing device for the damper for the mine shaft according to claim 4, wherein: the rotary drum (2) is arranged on the support (1), the push rod (3) and the swing rod (4) are arranged on the rotary drum (2), a connecting rod (5) is arranged between the push rod (3) and the swing rod (4), and the connecting disc (7) is arranged on the air door and a folding rod (6) is arranged between the connecting disc (7) and the swing rod (4).

6. The opening and closing device for the damper for the mine shaft according to claim 5, wherein: the seat (1) is configured to include a seat portion (11) and a shaft portion (12) and an upper end surface portion of the seat portion (11) is configured to be coupled with the shaft portion (12) and the torsion spring (8), the seat portion (11) is configured to be disposed at a side surface portion of the track of the mine car and the seat portion (11) is configured to be coupled with a foundation in an embedded manner, the shaft portion (12) is configured to be rotatably coupled with the rotary cylinder (2) and the seat portion (11) is configured to be a rectangular column-shaped body, and the shaft portion (12) is.

7. The opening and closing device for the damper for the mine shaft according to claim 5, wherein: the rotating cylinder (2) is arranged to be a circular tubular body and the rotating cylinder (2) is arranged to be coupled with the support (1) through a bearing, the rotating cylinder (2) is arranged to be coupled with the torsion spring (8) in a penetrating manner, and the outer side surface part of the rotating cylinder (2) is respectively arranged to be coupled with the push rod (3), the swing rod (4) and the torsion spring (8).

8. The opening and closing device for the damper for the mine shaft according to claim 5, wherein: the torsion spring (8) is connected with the support (1) in a sleeved mode, one end of the torsion spring (8) is connected with the rotating cylinder (2), and the other end of the torsion spring (8) is connected with the support (1).

9. The opening and closing device for the damper for the mine shaft according to claim 5, wherein: the push rod (3) is arranged to comprise a first rod part (31), a second rod part (32) and a third rod part (33), one end of the first rod part (31) and one end of the third rod part (33) are respectively arranged to be connected with the rotating cylinder (2), the other end of the first rod part (31) is arranged to be connected with one end of the second rod part (32) and the other end of the second rod part (32) is arranged to be connected with the other end of the third rod part (33), the first rod part (31), the second rod part (32) and the third rod part (33) are respectively arranged to be round rod-shaped bodies, the first rod part (31), the second rod part (32) and the third rod part (33) are arranged to be distributed in a triangle shape, the other end of the first rod part (31) is arranged to extend to a mine car track and the middle part of the first rod part (31) is arranged to be connected with the connecting rod (5),

or one end of the swing rod (4) is connected with the rotating cylinder (2) and the other end of the swing rod (4) is connected with the folding rod (6) through a pin shaft, the middle part of the swing rod (4) is connected with the connecting rod (5) and the swing rod (4) is a rectangular beam body,

or the connecting rod (5) is arranged to be a rectangular strip body, one end of the connecting rod (5) is arranged to be connected with the push rod (3), the other end of the connecting rod (5) is arranged to be connected with the swinging rod (4),

or the folding rod (6) is a rectangular beam body with double connecting lug seats at the end head, the double connecting lug seat at one end head of the folding rod (6) is connected with the swinging rod (4) through a pin shaft, the double connecting lug seat at the other end head of the folding rod (6) is connected with the connecting disc (7) through a pin shaft,

or the connecting disc (7) is arranged as a part of the disc, a pin hole body is arranged on the connecting disc (7), the plane part of the connecting disc (7) is connected with the air door, and the pin hole body of the connecting disc (7) is connected with the folding rod (6) through a pin shaft.

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