CN215859666U - Pneumatic sliding plug door pump structure - Google Patents

Abstract

The utility model discloses a pneumatic sliding plug door pump structure, which relates to the technical field of traffic equipment and comprises a tray, wherein one end of the tray is welded with a cylinder fixing plate, the outer wall of the cylinder fixing plate is fixedly provided with a cylinder, the two sides of the outer wall of the tray are both fixedly provided with steel wire wheel fixing shafts, the outer walls of the two steel wire wheel fixing shafts are both sleeved with steel wire wheels, and the outer walls of the two steel wire wheels are respectively sleeved with a first steel wire rope and a second steel wire rope. Short service life.

Description

Pneumatic sliding plug door pump structure

Technical Field

The utility model relates to the technical field of traffic equipment, in particular to a pneumatic sliding plug door pump structure.

Background

The common bus doors, such as a small bus door, a medium bus door and a large bus door, mainly comprise an inner swing door, a folding door and an outer swing door, and the sliding plug door is a new product popular in recent years, has the advantages of attractive appearance and large opening degree, does not occupy the passage for passengers to get on or off, and is widely accepted by the bus companies and the passenger factories.

Chinese patent publication No. CN211081453U discloses a vertical synchronization mechanism for a sliding plug door, which describes "a vertical synchronization mechanism for a sliding plug door, comprising a swing arm shaft, wherein the swing arm shaft is vertically arranged, the upper end of the swing arm shaft is rotatably mounted on a mounting mechanism of the sliding plug door, the upper end of the swing arm shaft is mounted with a swing arm transmission mechanism which drives the swing arm shaft to rotate along with the translational sliding of a sliding mechanism of the sliding plug door, and the lower end of the swing arm shaft is rotatably mounted on an automobile body", compared with the prior art, the vertical synchronization mechanism can enable the upper and lower ends of each single door body to be uniformly stressed; and the whole structure is compact, and the cover is not easy to be opened by others.

The chinese patent publication of publication No. CN213775043U discloses a preceding single stopper sliding door that operates stably, describes "a preceding single stopper sliding door that operates stably, including stopper sliding door support, the bottom swing joint of stopper sliding door support has stopper sliding door fixed plate, the top swing joint of stopper sliding door fixed plate has the closing block, the equal swing joint in left and right sides at stopper sliding door fixed plate top has the leading wheel", this preceding single stopper sliding door that operates stably, preceding single stopper sliding door can not produce the phenomenon of skew or slope at the in-process of motion, reduces the probability of preceding single stopper sliding door damage, has prolonged the life of preceding single stopper sliding door, has improved the availability factor and the result of use of preceding single stopper sliding door.

However, the pneumatic sliding plug door has the defects of complex structure, heavy weight, inconvenience in installation, unstable operation and the like. Therefore, the sliding plug door structure which is simple and reliable in structure, convenient to install and debug, stable in operation, strong in adaptability and long in service life is urgently needed to be developed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects in the prior art and provides a pump structure of a pneumatic sliding plug door.

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

a pneumatic sliding plug door pump structure comprises a tray, wherein one end of the tray is welded with a cylinder fixing plate, the outer wall of the cylinder fixing plate is fixedly provided with a cylinder, both sides of the outer wall of the tray are fixedly provided with steel wire wheel fixing shafts, the outer walls of the two steel wire wheel fixing shafts are respectively sleeved with a steel wire wheel, the outer walls of the two steel wire wheels are respectively sleeved with a first steel wire rope and a second steel wire rope, one end of the first steel wire rope is fixedly connected with a first fixing plate, the other end of the first steel wire rope is fixedly connected with a second fixing plate, the outer wall of the first fixing plate is fixedly connected with a transmission plate, the outer wall of the tray is fixedly provided with a linear slide rail, the outer wall of the linear slide rail is slidably connected with a sliding block, the outer wall of the sliding block is fixedly provided with a door frame, the door frame is used for installing a vehicle door, and the top of the door frame is fixedly provided with a first cam follower, an upper guide rail is arranged at the upper part of the first cam follower, bearing fixing shafts are fixedly arranged at two ends of the tray, deep groove ball bearings are fixedly sleeved on the outer walls of the bearing fixing shafts, and second cam followers are fixedly arranged on the outer sides of the deep groove ball bearings;

the upper surface of the upper guide rail is fixedly provided with an upper cover shell, the two ends of the sliding block are fixedly provided with supporting frames, the top of each supporting frame is rotatably connected with a synchronizing rod, and the two ends of each synchronizing rod are fixedly sleeved with a synchronizing swing arm.

Preferably, the steel wire wheel fixing shaft is rotatably connected with the steel wire wheel through a bearing, the steel wire wheel is vertically installed, one end of the second steel wire rope is fixedly connected with one side of the first fixing plate, the other end of the second steel wire rope is fixedly connected with one end of the second fixing plate, when the first fixing plate moves, the first fixing plate drives the first steel wire rope and the second steel wire rope to move, and the first steel wire rope and the second steel wire rope drive the second fixing plate to move.

Preferably, the number of the sliding blocks is four, the sliding blocks are respectively distributed on two sides of the linear sliding rail, the number of the holding frames is two, the holding frames are respectively distributed on two sides of the tray, the two holding frames are respectively fixedly connected with the first fixing plate and the second fixing plate, and the first fixing plate and the second fixing plate can drive the sliding blocks to move.

Preferably, one side of driving plate is provided with the response piece, driving plate and cylinder are located same horizontal plane, and correspond each other, the output and the driving plate fixed connection of cylinder are concertina movement through control cylinder, and the cylinder passes through the driving plate and drives first fixed plate removal.

Preferably, the upper guide rail comprises a linear guide rail, an arc-shaped guide rail is welded at one end of the linear guide rail, guide grooves are formed in the lower surfaces of the linear guide rail and the arc-shaped guide rail, the first cam follower is located inside the guide grooves, and the first cam follower at the top of the sliding block slides in the guide grooves in the upper guide rail, so that the first cam follower horizontally moves along the guide grooves.

Preferably, the third cam followers are fixedly mounted on two sides of the top of the tray, are located on the inner side of the deep groove ball bearing and are in contact with the side wall of the supporting frame, and when the tray moves, the third cam followers play a guiding role, so that the tray is prevented from moving, and the moving stability of the device is improved.

Preferably, the bottom of the support frame is provided with an opening, the deep groove ball bearing is located in the bottom opening of the support frame and is in sliding connection with the support frame, the deep groove ball bearing horizontally moves in the opening of the support frame, and the deep groove ball bearing is used for supporting the tray to move in the front-back direction.

Preferably, an opening is formed in the bottom of the synchronous swing arm, the second cam follower is located in the opening in the bottom of the synchronous swing arm, the second cam follower is connected with the synchronous swing arm in a sliding mode, the second cam follower drives the synchronous swing arm to swing through the synchronous swing arm, and the synchronous swing arm drives the synchronous rod to rotate, so that the front and back movement of the holding frame is synchronous.

Preferably, the bottom of the support frame is fixedly provided with a mounting bracket through a bolt, and the mounting bracket is fixedly connected with an external carriage and used for mounting and fixing the whole structure.

Preferably, the outside of installing support is rotated and is connected with the stand, the top fixed mounting of stand has last rocking arm, the other end of going up the rocking arm is rotated and is connected with the swing arm, the other end of going up the swing arm is rotated with the bottom outer wall of tray and is connected, and when the tray carried out the seesaw, the tray passed through the swing arm and drives the swing of going up the swing arm, goes up the swing arm and drives the stand and rotate in step, the bottom fixed mounting of stand has swing arm down, the bottom fixedly connected with third fixed plate of stand through the position of the swing arm under the adjustment stand bottom, makes that of swing arm down drive about door lower part position motion coordinate unanimously, realizes synchronous motion.

The utility model has the beneficial effects that:

1. according to the utility model, the cylinder is controlled to do telescopic motion, the cylinder drives the first fixing plate to move through the transmission plate, the first fixing plate drives the first steel wire rope and the second steel wire rope to move, the first steel wire rope and the second steel wire rope drive the second fixing plate to move, the first fixing plate and the second fixing plate respectively drive the portal frame to move, and the portal frame synchronously drives the sliding block to move along the direction of the linear sliding rail, so that the swing of the portal frame is controlled, and the synchronous switching of the left door and the right door is realized.

2. According to the utility model, the upper guide rail is fixedly arranged on the lower surface of the upper housing, the first cam follower at the top of the sliding block slides in the guide groove in the upper guide rail, so that the first cam follower horizontally moves along the guide groove, and because one end of the guide groove is arc-shaped, the first cam follower drives the holding frame and the tray to move forwards and backwards, so that the plugging action of the holding frame is realized, and meanwhile, the upper guide rail adopts a single guide rail to realize plugging, so that the on-site loading and debugging are facilitated.

3. According to the utility model, the upper surface of the upper housing is provided with the synchronous rod, the two ends of the upper housing are provided with the synchronous swing arms, the tray drives the deep groove ball bearing and the second cam follower to move forwards and backwards, the deep groove ball bearing moves horizontally in the opening of the support frame, the second cam follower drives the synchronous swing arms to swing through the synchronous swing arms, and the synchronous swing arms drive the synchronous rods to rotate, so that the forward and backward movement synchronization of the holding frame is ensured, namely, the whole mechanism runs reliably and smoothly through the design of the synchronous rods, the upright posts and the synchronous swing arms, and when the tray moves, the third cam follower plays a role in guiding, so that the tray is prevented from moving, and the running stability of the mechanism is improved.

4. In the utility model, when the tray moves back and forth, the upper swing arm is driven by the tray through the upper swing arm to swing, the upright post is driven by the upper swing arm to rotate synchronously, and the lower swing arm drives the lower positions of the left door and the right door to move coordinately and consistently by adjusting the position of the lower swing arm at the bottom of the upright post, so that the synchronous movement is realized, and the whole mechanism runs reliably and smoothly.

In a word, the main transmission part is solidified to the tray as a new product, so that the structure is compact, the number of parts and the number of movable parts are reduced, the operation is reliable, the service life is long, and the utility model has the advantages of stable transmission, small occupied space, light weight, convenient installation and debugging and stable and reliable operation.

Drawings

Fig. 1 is a front view of a tray, a steel wire wheel fixing shaft and a steel wire wheel of a pneumatic sliding plug door pump structure of the utility model.

Fig. 2 is a top view of the tray, the steel wire wheel fixing shaft and the steel wire wheel of the pump structure of the pneumatic sliding plug door of the utility model.

Fig. 3 is a left side view of the linear guide, slider, upper guide of a pneumatic sliding plug door pump structure of the present invention.

Fig. 4 is a schematic structural view of an upper guide rail of a pump structure of a pneumatic sliding plug door according to the present invention.

Fig. 5 is a perspective view of a pump structure of a pneumatic sliding plug door according to the present invention.

Fig. 6 is a schematic structural diagram of an upper cover shell and a synchronous rod of a pump structure of a pneumatic sliding plug door of the utility model.

Fig. 7 is a front view of the tray, the door handle, and the upper housing of a pneumatic sliding plug door pump arrangement of the present invention.

Fig. 8 is a back view of the tray, door handle, upper housing of a pneumatic sliding plug door pump arrangement of the present invention.

Figure 9 is a side view of a mounting bracket, portal frame of a pneumatic sliding plug door pump structure of the present invention.

Fig. 10 is a schematic structural view of a pillar of a pump structure of a pneumatic sliding plug door according to the present invention.

Fig. 11 is a schematic structural diagram of a lower swing arm, an upright post fixing plate and an upper swing arm of a pneumatic sliding plug door pump structure according to the utility model.

Fig. 12 is a schematic structural view of a synchronous swing arm of a pneumatic sliding plug door pump structure according to the present invention.

Fig. 13 is a schematic structural diagram of a support frame of a pump structure of a pneumatic sliding plug door according to the present invention.

Fig. 14 is a schematic structural view of an upper swing arm of a pneumatic sliding plug door pump structure according to the present invention.

Figure 15 is a top view of a pump configuration for a pneumatic plug door of the present invention.

Figure 16 is a bottom view of a pump configuration for a pneumatic plug door of the present invention.

Reference numbers in the figures: 1. a tray; 2. a cylinder fixing plate; 3. a cylinder; 4. a steel wire wheel fixing shaft; 5. a wire wheel; 6. a first wire rope; 7. a second wire rope; 8. a first fixing plate; 9. a second fixing plate; 10. a drive plate; 11. an induction block; 12. a linear slide rail; 13. a slider; 14. an upper guide rail; 1401. a linear guide rail; 1402. an arc-shaped guide rail; 1403. a guide groove; 15. a first cam follower; 16. a bearing fixing shaft; 17. a deep groove ball bearing; 18. a second cam follower; 19. a third cam follower; 20. mounting a bracket; 21. a portal frame; 22. a column; 23. an upper housing; 24. a synchronization lever; 25. a synchronous swing arm; 26. a support frame; 27. a lower swing arm; 28. a third fixing plate; 29. an upper rotating arm; 30. and an upper swing arm.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Example (b):

as shown in figures 1 to 16:

a pneumatic sliding plug door pump structure comprises a tray 1, wherein one end of the tray 1 is welded with a cylinder fixing plate 2, the outer wall of the cylinder fixing plate 2 is fixedly provided with a cylinder 3, both sides of the outer wall of the tray 1 are fixedly provided with steel wire wheel fixing shafts 4, the outer walls of the two steel wire wheel fixing shafts 4 are respectively sleeved with a steel wire wheel 5, the outer walls of the two steel wire wheels 5 are respectively sleeved with a first steel wire rope 6 and a second steel wire rope 7, one end of the first steel wire rope 6 is fixedly connected with a first fixing plate 8, the other end of the first steel wire rope 6 is fixedly connected with a second fixing plate 9, the outer wall of the first fixing plate 8 is fixedly connected with a transmission plate 10, the outer wall of the tray 1 is fixedly provided with a linear slide rail 12, the outer wall of the linear slide rail 12 is slidably connected with a slide block 13, the outer wall of the slide block 13 is fixedly provided with a door holding frame 21, the door holding frame 21 is used for installing a vehicle door, the top of the door holding frame 21 is fixedly provided with a first cam follower 15, an upper guide rail 14 is arranged at the upper part of the first cam follower 15, bearing fixing shafts 16 are fixedly arranged at two ends of the tray 1, deep groove ball bearings 17 are fixedly sleeved on the outer walls of the bearing fixing shafts 16, and second cam followers 18 are fixedly arranged on the outer sides of the deep groove ball bearings 17;

the upper surface of the upper guide rail 14 is fixedly provided with an upper cover shell 23, the two ends of the sliding block 13 are fixedly provided with supporting frames 26, the tops of the supporting frames 26 are rotatably connected with synchronizing rods 24, and the two ends of the synchronizing rods 24 are fixedly sleeved with synchronizing swing arms 25.

Referring to fig. 1-2, the wire wheel fixing shaft 4 is rotatably connected with the wire wheel 5 through a bearing, the wire wheel 5 is vertically installed, one end of the second wire rope 7 is fixedly connected with one side of the first fixing plate 8, the other end of the second wire rope 7 is fixedly connected with one end of the second fixing plate 9, when the first fixing plate 8 moves, the first fixing plate 8 drives the first wire rope 6 and the second wire rope 7 to move, and the first wire rope 6 and the second wire rope 7 drive the second fixing plate 9 to move.

Referring to fig. 1-3, four sliders 13 are respectively arranged on two sides of the linear slide rail 12, two door holding frames 21 are respectively arranged on two sides of the tray 1, the two sliders 13 are used for bearing a single vehicle door, the two door holding frames 21 are respectively fixedly connected with the first fixing plate 8 and the second fixing plate 9, and the first fixing plate 8 and the second fixing plate 9 can drive the door holding frames 21 to move.

Referring to fig. 1-2, one side of the driving plate 10 is provided with an induction block 11, the driving plate 10 and the cylinder 3 are located on the same horizontal plane and correspond to each other, the output end of the cylinder 3 is fixedly connected with the driving plate 10, the cylinder 3 is controlled to perform telescopic motion, and the cylinder 3 drives the first fixing plate 8 to move through the driving plate 10.

Referring to fig. 1-4, the upper rail 14 includes a linear rail 1401, an arc-shaped rail 1402 is welded at one end of the linear rail 1401, guide grooves 1403 are respectively formed on the lower surfaces of the linear rail 1401 and the arc-shaped rail 1402, a first cam follower 15 is located inside the guide grooves 1403, and the first cam follower 15 on the top of the slider 13 slides in the guide grooves 1403 in the upper rail 14, so that the first cam follower 15 horizontally moves along the guide grooves 1403, and since one end of the guide grooves 1403 is arc-shaped, the first cam follower 15 drives the linking frame 21 and the tray 1 to move forward and backward.

Referring to fig. 2, both sides of the top of the tray 1 are fixedly provided with third cam followers 19, the third cam followers 19 are located on the inner side of the deep groove ball bearing 17, the third cam followers 19 are in contact with the side walls of the supporting frame 26, and when the tray 1 moves, the third cam followers 19 play a role in guiding, so that the tray 1 is prevented from moving, and the stability of the mechanism in operation is improved.

Referring to fig. 9 and 13, an opening is formed in the bottom of the support frame 26, the deep groove ball bearing 17 is located in the opening in the bottom of the support frame 26, the deep groove ball bearing 17 is slidably connected with the support frame 26, the deep groove ball bearing 17 horizontally moves in the opening of the support frame 26, and the deep groove ball bearing 17 is used for supporting the tray 1 to move in the front-back direction.

Referring to fig. 9 and 12, an opening is formed in the bottom of the synchronous swing arm 25, the second cam follower 18 is located in the opening in the bottom of the synchronous swing arm 25, the second cam follower 18 is slidably connected to the synchronous swing arm 25, the second cam follower 18 drives the synchronous swing arm 25 to swing through the synchronous swing arm 25, the synchronous swing arm 25 drives the synchronous rod 24 to rotate, and the front-back direction motion synchronization of the portal frame 21 is ensured.

Referring to fig. 6, the bottom of the supporting frame 26 is fixedly installed with a mounting bracket 20 through bolts, and the mounting bracket 20 is fixedly connected with an external compartment for installing and fixing the whole structure.

Referring to fig. 5-11, the outer side of the mounting bracket 20 is rotatably connected with an upright post 22, the top of the upright post 22 is fixedly provided with an upper rotating arm 29, the other end of the upper rotating arm 29 is rotatably connected with an upper swing arm 30, the other end of the upper swing arm 30 is rotatably connected with the outer wall of the bottom of the tray 1, when the tray 1 moves back and forth, the tray 1 drives the upper rotating arm 29 to swing through the upper swing arm 30, the upper rotating arm 29 drives the upright post 22 to rotate synchronously, the bottom of the upright post 22 is fixedly provided with a lower swing arm 27, the bottom of the upright post 22 is fixedly connected with a third fixing plate 28, and by adjusting the position of the lower swing arm 27 at the bottom of the upright post 22, the lower positions of the left and right doors driven by the lower swing arm 27 are moved coordinately, so as to realize synchronous movement.

The specific use mode and function of the embodiment are as follows:

when the automatic opening and closing device is used, the cylinder 3 is controlled to do telescopic motion, the cylinder 3 drives the first fixing plate 8 to move through the transmission plate 10, the first fixing plate 8 drives the first steel wire rope 6 and the second steel wire rope 7 to move, the first steel wire rope 6 and the second steel wire rope 7 drive the second fixing plate 9 to move, the first fixing plate 8 and the second fixing plate 9 respectively drive the holding frame 21 to move, and the holding frame 21 synchronously drives the sliding block 13 to move along the direction of the linear sliding rail 12, so that the holding frame 21 is controlled to swing, and the left door and the right door are synchronously opened and closed;

the structure and process are described with reference to FIGS. 1-6.

Meanwhile, an upper guide rail 14 is fixedly installed on the lower surface of the upper housing 23, a first cam follower 15 on the top of the sliding block 13 slides in a guide groove 1403 in the upper guide rail 14, so that the first cam follower 15 horizontally moves along the guide groove 1403, and because one end of the guide groove 1403 is arc-shaped, the first cam follower 15 drives the portal frame 21 and the tray 1 to move forwards and backwards, so that the plugging action of the portal frame 21 is realized, and meanwhile, the upper guide rail 14 adopts a single guide rail to realize plugging, so that the on-site loading and debugging are facilitated;

the structure and process are described with reference to FIGS. 1-9.

Because the upper surface of the upper housing 23 is provided with the synchronous rod 24, the two ends of the upper housing 23 are provided with the synchronous swing arms 25, the tray 1 drives the deep groove ball bearing 17 and the second cam follower 18 to move forwards and backwards, the deep groove ball bearing 17 moves horizontally in the opening of the support frame 26, the second cam follower 18 drives the synchronous swing arm 25 to swing through the synchronous swing arm 25, and the synchronous swing arm 25 drives the synchronous rod 24 to rotate, so that the forward and backward movement synchronization of the holding frame 21 is ensured;

the above structure and process are shown in FIGS. 5-16.

When the tray 1 moves back and forth, the tray 1 drives the upper rotating arm 29 to swing through the upper swing arm 30, the upper rotating arm 29 drives the upright post 22 to rotate synchronously, and the lower swing arm 27 drives the lower positions of the left door and the right door to move coordinately through adjusting the position of the lower swing arm 27 at the bottom of the upright post 22, so that synchronous movement is realized.

The above structure and process are shown in FIGS. 7-14.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims (10)

1. A pneumatic sliding plug door pump structure comprises a tray (1) and is characterized in that one end of the tray (1) is welded with a cylinder fixing plate (2), the outer wall of the cylinder fixing plate (2) is fixedly provided with a cylinder (3), two sides of the outer wall of the tray (1) are fixedly provided with steel wire wheel fixing shafts (4), the outer walls of the two steel wire wheel fixing shafts (4) are respectively sleeved with a steel wire wheel (5), the outer walls of the two steel wire wheels (5) are respectively sleeved with a first steel wire rope (6) and a second steel wire rope (7), one end of the first steel wire rope (6) is fixedly connected with a first fixing plate (8), the other end of the first steel wire rope (6) is fixedly connected with a second fixing plate (9), the outer wall of the first fixing plate (8) is fixedly connected with a transmission plate (10), the outer wall of the tray (1) is fixedly provided with a linear sliding rail (12), the outer wall of the linear sliding rail (12) is connected with a sliding block (13) in a sliding mode, the outer wall of the sliding block (13) is fixedly provided with a connecting frame (21), the top of the connecting frame (21) is fixedly provided with a first cam follower (15), the upper portion of the first cam follower (15) is provided with an upper guide rail (14), two ends of the tray (1) are fixedly provided with bearing fixing shafts (16), the outer wall of each bearing fixing shaft (16) is fixedly sleeved with a deep groove ball bearing (17), and the outer side of each deep groove ball bearing (17) is fixedly provided with a second cam follower (18);

the upper surface of the upper guide rail (14) is fixedly provided with an upper cover shell (23), the two ends of the sliding block (13) are fixedly provided with supporting frames (26), the top of each supporting frame (26) is rotatably connected with a synchronizing rod (24), and the two ends of each synchronizing rod (24) are fixedly sleeved with synchronizing swing arms (25).

2. A pump structure of a pneumatic plug door according to claim 1, wherein the wire wheel fixing shaft (4) is rotatably connected with the wire wheel (5) through a bearing, one end of the second wire rope (7) is fixedly connected with one side of the first fixing plate (8), and the other end of the second wire rope (7) is fixedly connected with one end of the second fixing plate (9).

3. A pump structure of a pneumatic sliding plug door according to claim 1, characterized in that the number of the sliding blocks (13) is four and respectively distributed on two sides of the linear guideway (12), the number of the door frames (21) is two and respectively distributed on two sides of the tray (1), and the two door frames (21) are respectively fixedly connected with the first fixing plate (8) and the second fixing plate (9).

4. A pump structure of a pneumatic plug door according to claim 1, characterized in that a sensing block (11) is disposed on one side of the driving plate (10), the driving plate (10) and the cylinder (3) are located on the same horizontal plane and correspond to each other, and the output end of the cylinder (3) is fixedly connected to the driving plate (10).

5. A pump structure of a pneumatic sliding plug door according to claim 1, wherein the upper rail (14) comprises a linear rail (1401), an arc rail (1402) is welded to one end of the linear rail (1401), guide grooves (1403) are arranged on the lower surfaces of the linear rail (1401) and the arc rail (1402), and the first cam follower (15) is located inside the guide grooves (1403).

6. A pump structure of a pneumatic plug door according to claim 1, characterized in that a third cam follower (19) is fixedly mounted on both sides of the top of the tray (1), the third cam follower (19) being located inside the deep groove ball bearing (17).

7. A pump structure of a pneumatic plug door according to claim 1, wherein the bottom of the support frame (26) is opened, the deep groove ball bearing (17) is located in the bottom opening of the support frame (26), and the deep groove ball bearing (17) is slidably connected with the support frame (26).

8. A pump structure for a pneumatic plug door according to claim 1, wherein the bottom of the synchronization swing arm (25) is opened, the second cam follower (18) is located in the bottom opening of the synchronization swing arm (25), and the second cam follower (18) is slidably connected to the synchronization swing arm (25).

9. A pneumatic plug door pump structure according to claim 1, wherein the mounting brackets (20) are fixedly mounted to the bottom of the support frame (26) by bolts.

10. A pump structure of a pneumatic plug door according to claim 9, characterized in that the outer side of the mounting bracket (20) is rotatably connected with a vertical column (22), the top of the vertical column (22) is fixedly provided with an upper rotating arm (29), the other end of the upper rotating arm (29) is rotatably connected with an upper swing arm (30), the other end of the upper swing arm (30) is rotatably connected with the outer wall of the bottom of the tray (1), the bottom of the vertical column (22) is fixedly provided with a lower swing arm (27), and the bottom end of the vertical column (22) is fixedly connected with a third fixing plate (28).

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