Coaxiality detection device for vertical shaft of airplane cabin door

Abstract

The invention discloses a coaxiality detection device for a vertical shaft of an aircraft cabin door, relates to the field of vertical shaft detection, and solves the problem that an existing coaxiality detection device is difficult to comprehensively detect the vertical shaft, the coaxiality detection device comprises a device base and a mounting box fixedly mounted at the top of the device base, and a circular box is rotatably mounted on the inner side of the mounting box; coaxial detection openings are formed in the outer side of the circular box and the outer side of the mounting box, and four displacement sensors in central symmetry are arranged on the inner side of the circular box; the detection mechanism is used for enabling the four displacement sensors to comprehensively detect the vertical shaft, and the detection mechanism is mounted in the mounting box; according to the invention, through the detection mechanism, when the four displacement sensors keep rotating and synchronously push the vertical shaft, comprehensive coaxiality detection can be carried out on the outer side of the vertical shaft, so that the effect of comprehensive detection is achieved.

Description

Technical Field

[0001] The invention relates to the field of vertical axis detection, in particular to a coaxiality detection device for a vertical axis of an aircraft cabin door. Background Art

[0002] Aircraft doors are doors on the aircraft for people, cargo and equipment to enter and exit, including boarding doors, service doors, emergency exit windows, cargo doors and inspection covers, etc. The designs and functions of these doors vary, but their common purpose is to ensure a safe and smooth flight.

[0003] With the comprehensive development of the economy and the improvement of people's quality of life, the quality of aircraft products has received extensive attention from all walks of life, and the coaxiality control of cabin doors affects the final quality of aircraft. Based on this, in order to improve the quality and efficiency of aircraft assembly, the vertical axis of the aircraft cabin door needs to be detected before assembly. The existing Chinese public patent document: CN108050922A discloses a coaxiality detection device. Although the axis to be detected can be positioned by three bearings, so that the probe of the micrometer can perform coaxiality detection on the axis to be detected, the vertical axis of the aircraft cabin door is relatively long. During the detection, the vertical axis needs to be displaced. When the bearing is clamped, it is difficult to push the vertical axis, and it will cause wear on the outer side of the vertical axis, which is easy to cause incomplete detection. Summary of the invention

[0004] The object of the present invention is to provide a device for detecting the coaxiality of the vertical axis of an aircraft cabin door, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The invention discloses a coaxiality detection device for the vertical axis of an aircraft cabin door, comprising: a device base and a mounting box fixedly mounted on the top of the device base, a circular box rotatably mounted on the inner side of the mounting box, coaxial detection openings are provided on the outer sides of the circular box and the mounting box, and the vertical axis can be inserted into the circular box through the detection openings, and four displacement sensors in central symmetry are arranged on the inner side of the circular box for performing coaxiality detection on the vertical axis; the invention also comprises: a detection mechanism for enabling the four displacement sensors to perform comprehensive detection on the vertical axis, the detection mechanism being mounted inside the mounting box; a distance adjustment mechanism for enabling the four displacement sensors to perform synchronous adjustment with the vertical axis, the distance adjustment mechanism being mounted inside the circular box; and a shaft pushing mechanism for pushing the vertical axis into the detection opening of the mounting box, the shaft pushing mechanism being mounted on the top of the device base.

[0007] Preferably, the detection mechanism includes a positioning plate fixedly mounted on the outside of the displacement sensor, both sides of the positioning plate are fixedly connected with mounting seats, the bottom of the mounting seat is an arc-shaped structure, and three equidistantly distributed balls are rotatably mounted on the bottom of the mounting seat to facilitate the vertical axis to move along the outside of the balls, the mounting seat is located on the outside of the mounting box, and a sleeve box is fixedly connected to the side of the positioning plate close to the inner side of the circular box, and a positioning box is limitedly slidably provided on the inner side of the sleeve box, and the positioning box is fixedly mounted on the inner side of the circular box, and the displacement sensor is close to the positioning plate. A telescopic rod is fixedly connected to one side of the box, and a micrometer is fixedly installed at one end of the telescopic rod away from the displacement sensor, which is used to display the value detected by the displacement sensor. The micrometer is fixedly installed on the outside of the circular box, and a motor is fixedly installed on the outside of the installation box. The output end of the motor extends to the inside of the installation box and is fixedly connected to a gear cylinder 1. Two gear rings matching the gear cylinder 1 are fixedly connected to the outside of the circular box. The gear cylinder 1 is driven to rotate by the motor, and the gear cylinder 1 drives the circular box to rotate through the gear ring, thereby realizing comprehensive detection of the vertical axis by the displacement sensor.

[0008] Preferably, the distance adjustment mechanism includes two swivels symmetrically mounted on the inner side of the circular box, a plurality of centrally symmetrical support rods are fixedly connected between the two swivels, and two symmetrically distributed sliding rods are fixedly connected to the outer side of the sleeve box, and an arc groove is provided on the outer side of the swivel for limiting the sliding of the sliding rod. When the swivel rotates, the sliding rod can be driven to move through the arc groove, so that the sliding rod pulls the sleeve to move along the outer side of the positioning box, and an arc cavity is provided on the outer side of the swivel located on the left side of the circular box, and an arc rack is fixedly connected to the inner wall of the arc cavity, and a gear matching the arc rack is provided on the inner side of the arc cavity. The rotating gear can drive the swivel to rotate through the arc rack, and the axis of the gear is fixedly connected to an adjusting bolt extending to the outside of the mounting box for adjusting the gear.

[0009] Preferably, the push shaft mechanism includes two support plates symmetrically fixedly installed on the top of the device base, two symmetrically distributed guide rods are fixedly connected between the two support plates, the guide rods pass through the installation box, a movable plate 1 slidably installed on the outside of the guide rods is provided on the left side of the installation box, a side of the movable plate 1 close to the installation box is fixedly connected to a push rod, and a movable plate 2 slidably installed on the outside of the guide rods is provided on the right side of the installation box, a threaded barrel 1 is fixedly installed on the outside of the movable plate 2, a handle is provided on the right side of the movable plate 2, a rotating rod is fixedly connected to the outside of the handle, and a threaded barrel 1 is provided on the outside of the rotating rod The matching threads and the turning of the handle can drive the rotating rod to rotate and move along the inner side of the threaded barrel 1. The end of the rod away from the movable plate 1 and the end of the rotating rod away from the handle are both installed with rubber blocks, so that the two rubber blocks clamp the vertical axis to be detected. A screw is rotatably installed between the two support plates, and the screw passes through the installation box. The outer side of the screw is fixedly connected with a gear barrel 2 matching the gear ring. The outer sides of the movable plate 1 and the movable plate 2 are both fixedly connected with a threaded barrel 2 matching the screw. When the gear ring rotates, the screw can be driven to rotate through the gear barrel 2, so that the movable plate 1 and the movable plate 2 move synchronously, thereby pushing the vertical axis.

[0010] Preferably, a triangular clamping plate is fixedly connected to the top of the mounting seat, and a sliding groove for limiting the sliding of the triangular clamping plate is provided on the outer side of the circular box, thereby improving the stability of the mounting seat.

[0011] Preferably, both ends of the mounting seat are arc-shaped structures, which facilitates the alignment of the vertical axis with the four mounting seats.

[0012] Preferably, an observation port is provided on a side of the mounting box close to the gear cylinder for observing the micrometer.

[0013] Preferably, a connecting plate that slides through the installation box is fixedly connected between the movable plate 1 and the movable plate 2, so as to facilitate synchronous movement of the movable plate 1 and the movable plate 2.

[0014] Preferably, the rubber stopper is in a conical frustum structure, so as to stop against the inner side of the vertical axis.

[0015] Preferably, the two rubber blocks are respectively connected to the push rod and the rotating rod through mounting nuts, so as to facilitate the installation and removal of the rubber blocks.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention uses a detection mechanism so that the vertical axis can be inserted into the inner side of the circular box through the detection opening on the mounting box, so that the four displacement sensors are aligned with the vertical axis and the four displacement sensors are kept rotating. When the vertical axis is pushed synchronously, the outer side of the vertical axis can be fully coaxially detected, thereby achieving a comprehensive detection effect.

[0018] 2. The present invention can synchronously move the four displacement sensors and the center position of the circular box through the distance adjustment mechanism, which is convenient for positioning with the vertical axis, and adjust the displacement sensor according to the size of the vertical axis, so as to detect vertical axes of more sizes.

[0019] 3. The present invention can clamp and position the vertical axis through the push-axis mechanism, so that the four displacement sensors can send the vertical axis into the circular box when rotating, which is convenient for detecting the longer displacement vertical axis and allows the vertical axis to move at a uniform speed, thereby achieving the effect of improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of the installation box and the circular box in the present invention;

[0022] Figure 3 It is a structural schematic diagram of the gear ring and gear cylinder in the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the rotating ring and the positioning plate in the present invention;

[0024] Figure 5 It is a schematic diagram of the mounting seat and ball structure in the present invention;

[0025] Figure 6 It is a schematic diagram of the structure of the arc-shaped rack and the sliding rod in the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the sleeve box and the positioning box in the present invention;

[0027] Figure 8 It is a schematic diagram of the structure of the rubber stopper and the rotating rod in the present invention.

[0028] In the figure: 1. device base; 2. mounting box; 3. round box; 4. displacement sensor; 5. positioning plate; 6. mounting seat; 7. ball bearing; 8. sleeve box; 9. positioning box; 10. telescopic rod; 11. micrometer; 12. motor; 13. gear cylinder 1; 14. gear ring; 15. swivel; 16. slide rod; 17. arc cavity; 18. arc rack; 19. gear; 20. adjusting bolt; 21. support plate; 22. guide rod; 23. movable plate 1; 24. push rod; 25. movable plate 2; 26. threaded cylinder 1; 27. handle; 28. swivel rod; 29. ​​rubber push block; 30. screw; 31. gear cylinder 2; 32. threaded cylinder 2; 33. triangular clamp plate; 34. connecting plate; 35. mounting nut; 36. support rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative inspiration are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1-Figure 8 The coaxiality detection device for the vertical axis of the aircraft cabin door shown in the figure includes a device base 1 and a mounting box 2 fixedly installed on the top of the device base 1, a circular box 3 is rotatably installed on the inner side of the mounting box 2, and coaxial detection openings are provided on the outer sides of the circular box 3 and the outer sides of the mounting box 2, so that the vertical axis can be inserted into the circular box 3 through the detection opening, and four displacement sensors 4 in a central symmetric manner are arranged on the inner side of the circular box 3 for coaxiality detection of the vertical axis; it also includes: a detection mechanism, which is used to make the four displacement sensors 4 perform a comprehensive detection on the vertical axis, and the detection mechanism is installed inside the mounting box 2; a distance adjustment mechanism, which is used to make the four displacement sensors 4 synchronously adjust with the vertical axis, and the distance adjustment mechanism is installed inside the circular box 3; a shaft pushing mechanism, which is used to push the vertical axis into the detection opening of the mounting box 2, and the shaft pushing mechanism is installed on the top of the device base 1.

[0031] The detection mechanism includes a positioning plate 5 fixedly mounted on the outside of the displacement sensor 4, and both sides of the positioning plate 5 are fixedly connected with a mounting seat 6. The bottom of the mounting seat 6 is an arc-shaped structure, and three equally distributed balls 7 are rotatably mounted on the bottom of the mounting seat 6, so that the vertical axis can move along the outside of the balls 7. The mounting seat 6 is located on the outside of the mounting box 2, and a sleeve box 8 is fixedly connected to the side of the positioning plate 5 close to the inside of the circular box 3. A positioning box 9 is limitedly slid on the inside of the sleeve box 8, and the positioning box 9 is fixedly mounted on the inside of the circular box 3. A telescopic rod 10 is fixedly connected to the side of the displacement sensor 4 close to the positioning box 9 A micrometer 11 is fixedly installed at one end of the telescopic rod 10 away from the displacement sensor 4, which is used to display the value detected by the displacement sensor 4. The micrometer 11 is fixedly installed on the outside of the circular box 3. A motor 12 is fixedly installed on the outside of the mounting box 2. The output end of the motor 12 extends to the inside of the mounting box 2 and is fixedly connected to a gear cylinder 13. Two gear rings 14 that match the gear cylinder 13 are fixedly connected to the outside of the circular box 3. The gear cylinder 13 is driven to rotate by the motor 12, and the gear cylinder 13 drives the circular box 3 to rotate through the gear ring 14, so as to realize the comprehensive detection of the vertical axis by the displacement sensor 4;

[0032] The user inserts the vertical axis between the four mounting seats 6 on the left side of the circular box 3 and starts the motor 12. The motor 12 can drive the gear ring 14 to rotate through the gear cylinder 13, so that the gear ring 14 drives the circular box 3 to rotate along the inner side of the mounting box 2. The circular box 3 drives the positioning plate 5 to rotate through the positioning box 9 and the sleeve box 8, so that the displacement sensor 4 on the inner side of the positioning plate 5 makes a circular motion along the outer side of the vertical axis, and the user simultaneously pushes the vertical axis to move along the ball 7 on the mounting seat 6, so that the vertical axis can be aligned with the axis center of the detection port of the circular box 3, thereby realizing a comprehensive detection of the vertical axis through the four displacement sensors 4.

[0033] The distance adjustment mechanism includes two swivels 15 symmetrically mounted on the inner side of the circular box 3, a plurality of centrally symmetrical support rods 36 are fixedly connected between the two swivels 15, and two symmetrically distributed slide bars 16 are fixedly connected to the outer side of the sleeve box 8. An arc groove is provided on the outer side of the swivel 15 for the slide bar 16 to limit the sliding. When the swivel 15 rotates, the slide bar 16 can be driven to move through the arc groove, so that the slide bar 16 pulls the sleeve box 8 to move along the outer side of the positioning box 9. An arc cavity 17 is provided on the outer side of the swivel 15 located on the left side of the circular box 3, and an arc rack 18 is fixedly connected to the inner wall of the arc cavity 17. A gear 19 matched with the arc rack 18 is provided on the inner side of the arc cavity 17. The rotating gear 19 can drive the swivel 15 to rotate through the arc rack 18, and the axis of the gear 19 is fixedly connected with an adjusting bolt 20 extending to the outer side of the mounting box 2 for adjusting the gear 19;

[0034] The user can rotate the adjusting bolt 20 to drive the gear 19 to rotate, so that the gear 19 drives the corresponding swivel 15 to rotate through the arc-shaped rack 18. The swivel 15 can drive another swivel 15 to rotate synchronously through the support rod 36, so that the swivel 15 pulls the slide bar 16 to move through the arc-shaped groove, and the slide bar 16 drives the sleeve box 8 to move along the outside of the positioning box 9. The sleeve box 8 can drive the displacement sensor 4 and the mounting seat 6 to move synchronously through the positioning plate 5, so as to realize the synchronous adjustment of the four displacement sensors 4. The vertical axis can be positioned by the ball 7 on the mounting seat 6, and can be adjusted accordingly according to the size of the vertical axis, so as to facilitate the detection of vertical axes of more sizes.

[0035] The push shaft mechanism includes two support plates 21 symmetrically fixedly installed on the top of the device base 1, two symmetrically distributed guide rods 22 are fixedly connected between the two support plates 21, the guide rods 22 penetrate the installation box 2, and a movable plate 23 slidably installed on the outside of the guide rods 22 is provided on the left side of the installation box 2, and a push rod 24 is fixedly connected to the side of the movable plate 23 close to the installation box 2, and a movable plate 25 slidably installed on the outside of the guide rod 22 is provided on the right side of the installation box 2, and a threaded cylinder 26 is fixedly installed on the outside of the movable plate 25, and a handle 27 is provided on the right side of the movable plate 25, and a rotating rod 28 is fixedly connected to the outside of the handle 27, and a thread matching the threaded cylinder 26 is provided on the outside of the rotating rod 28. Turn the handle The handle 27 can drive the rotating rod 28 to rotate and move along the inner side of the threaded barrel 1 26. The end of the rod 24 away from the movable plate 1 23 and the end of the rotating rod 28 away from the handle 27 are both installed with rubber blocks 29, so that the two rubber blocks 29 clamp the vertical axis to be detected. A screw 30 is rotatably installed between the two support plates 21. The screw 30 passes through the installation box 2. The outer side of the screw 30 is fixedly connected with a gear barrel 2 31 matched with the gear ring 14. The outer sides of the movable plate 1 23 and the movable plate 25 are both fixedly connected with a threaded barrel 2 32 matched with the screw 30. When the gear ring 14 rotates, the screw 30 can be driven to rotate through the gear barrel 2 31, so that the movable plate 1 23 and the movable plate 25 move synchronously, so as to push the vertical axis.

[0036] When the user inserts the vertical axis between the four mounting seats 6 on the left side of the circular box 3, the user can rotate the rotating rod 28 through the handle 27 to make the rotating rod 28 rotate and move along the inner side of the threaded barrel 1 26, and the rubber stopper 29 on the rotating rod 28 contacts one side of the vertical axis, pushing the vertical axis to contact the rubber stopper 29 on the stopper 24, so that the vertical axis can be positioned and clamped. When the gear ring 14 rotates, it can drive the gear barrel 2 31 to rotate synchronously, so that the gear barrel 2 31 drives the screw 30 to rotate, and the screw 30 drives the movable plate 1 23 and the movable plate 2 25 to move in the same direction along the outer side of the guide rod 22 through the threaded barrel 2 32, so that the vertical axis can be pushed into the circular box 3, and the vertical axis can be detected, and corresponding adjustments can be made according to the length of the vertical axis, thereby improving the convenience and efficiency of vertical axis detection.

[0037] Working principle: First, the user inserts the vertical shaft between the four mounting seats 6 on the left side of the round box 3, and turns the handle 27, so that the handle 27 drives the rotating rod 28 to rotate, and the rotating rod 28 rotates along the inner side of the threaded cylinder 26, so that the rubber stopper 29 on the rotating rod 28 contacts one side of the vertical shaft, and pushes the vertical shaft to contact the rubber stopper 29 on the stopper 24, so as to position and clamp the vertical shaft. Then, the user starts the motor 12, and the motor 12 drives the gear cylinder 13 to rotate, so that the gear cylinder 13 is driven by the gear cylinder 13. The two gear rings 14 are driven to rotate, and the gear rings 14 drive the gear cylinder 2 31 to rotate synchronously, so that the gear cylinder 2 31 drives the screw rod 30 to rotate, and the screw rod 30 drives the movable plate 1 23 and the movable plate 2 25 to move in the same direction along the outer side of the guide rod 22 through the threaded cylinder 2 32, so as to drive the vertical axis to move synchronously. When one end of the vertical axis is aligned with the ball 7 of the mounting seat 6, the user turns off the motor 12 and rotates the adjusting bolt 20, so that the adjusting bolt 20 drives the gear 19 to rotate, and the gear 19 drives the corresponding gear 19 through the arc rack 18. The rotating ring 15 rotates, and the rotating ring 15 drives another rotating ring 15 to rotate synchronously through the support rod 36. The four arc grooves corresponding to the two rotating rings 15 pull the sliding rod 16 to move, and the sliding rod 16 drives the sleeve box 8 to move along the outside of the positioning box 9. The sleeve box 8 drives the displacement sensor 4 and the mounting seat 6 to move synchronously through the positioning plate 5, so that the ball 7 on the mounting seat 6 contacts the outside of the vertical axis and the bearing is axially positioned. Finally, the user starts the motor 12 again, and the rubber stop block 29 pushes the vertical axis to move along the outside of the ball 7 to the inside of the circular box 3. At the same time, the two gear rings 14 drive the circular box 3 to rotate along the inside of the mounting box 2. The circular box 3 drives the positioning plate 5 to rotate through the positioning box 9 and the sleeve box 8, so that the displacement sensor 4 on the inside of the positioning plate 5 makes a circular motion along the outside of the vertical axis. Therefore, as the vertical axis moves at a uniform speed, the four displacement sensors 4 in the rotating state can detect the coaxiality of the vertical axis, thereby achieving the effect of quickly and comprehensively detecting the vertical axis and improving the detection efficiency and convenience.

[0038] Example 2: Please refer to Figure 3 and Figure 5 The present embodiment further explains Example 1. A triangular clamping plate 33 is fixedly connected to the top of the mounting seat 6 in the figure. A sliding groove is provided on the outer side of the circular box 3 for limiting the sliding of the triangular clamping plate 33 to improve the stability of the mounting seat 6. Both ends of the mounting seat 6 are arc-shaped structures, which are convenient for aligning the vertical axis with the four mounting seats 6. An observation port is provided on the side of the mounting box 2 close to the gear cylinder 13 for observing the micrometer 11.

[0039] In this embodiment: when the positioning plate 5 moves, it can drive the mounting seat 6 and the triangular clamping plate 33 to move along the slide groove on the circular box 3, so that the triangular clamping plate 33 rests on the circular box 3 to provide support for the mounting seat 6. When the vertical axis moves toward the detection opening of the circular box 3, it can move along the arc edge on the outside of the mounting seat 6 to the center position of the detection opening, so as to facilitate the rapid alignment of the vertical axis with the four mounting seats 6. After detecting the vertical axis, the user can view the data on the micrometer 11 through the observation port on the outside of the mounting box 2.

[0040] Example 3: Please refer to Figure 2 and Figure 8 This embodiment further illustrates other embodiments. A connecting plate 34 that slides through the mounting box 2 is fixedly connected between the movable plate 1 23 and the movable plate 2 25 in the figure, so that the movable plate 1 23 and the movable plate 2 25 can move synchronously. The rubber stopper 29 has a conical frustum structure, so that it can stop against the inner side of the vertical axis. The two rubber stoppers 29 are respectively connected to the stopper rod 24 and the rotating rod 28 through the mounting nuts 35, so that the rubber stoppers 29 can be easily installed and removed.

[0041] In this embodiment: when the movable plate 1 23 and the movable plate 2 25 move, they can drive the connecting plate 34 to move synchronously, thereby improving the stability of the movable plate 1 23 and the movable plate 2 25 when moving, and maintaining the movable plate 1 23 and the movable plate 2 25 to move synchronously. The rubber stopper 29 can have its outer conical surface pressed against the outer side of the vertical axis, which is convenient for quickly positioning the vertical axis, and the user can rotate the mounting nut 35 to disassemble the rubber stopper 29, so as to replace the corresponding rubber stopper 29 according to the size of the vertical axis.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the coaxiality of a vertical axis of an aircraft cabin door, characterized in that: include: A device base (1) and a mounting box (2) fixedly mounted on the top of the device base (1); a circular box (3) is rotatably mounted on the inner side of the mounting box (2); coaxial detection openings are provided on the outer sides of the circular box (3) and the outer sides of the mounting box (2); and four displacement sensors (4) are arranged on the inner side of the circular box (3) in a centrally symmetrical manner; Also includes: A detection mechanism, used to enable the four displacement sensors (4) to perform a comprehensive detection on the vertical axis, the detection mechanism being installed inside the installation box (2); A distance adjustment mechanism, used for making the four displacement sensors (4) synchronously adjusted with the vertical axis, the distance adjustment mechanism being installed inside the circular box (3); The shaft pushing mechanism is used to push the vertical shaft into the detection opening of the installation box (2), and the shaft pushing mechanism is installed on the top of the device base (1).

2. The coaxiality detection device for the vertical axis of an aircraft cabin door according to claim 1, characterized in that: The detection mechanism comprises a positioning plate (5) fixedly mounted on the outside of the displacement sensor (4), both sides of the positioning plate (5) are fixedly connected with mounting seats (6), the bottom of the mounting seat (6) is an arc-shaped structure, three equidistantly distributed balls (7) are rotatably mounted on the bottom of the mounting seat (6), the mounting seat (6) is located on the outside of the installation box (2), a sleeve box (8) is fixedly connected to the side of the positioning plate (5) close to the inside of the circular box (3), a positioning box (9) is limitedly slidably mounted on the inside of the sleeve box (8), and the positioning box (9) is fixedly mounted on the inside of the circular box (3). On the inner side, a telescopic rod (10) is fixedly connected to a side of the displacement sensor (4) close to the positioning box (9), a micrometer (11) is fixedly installed on the end of the telescopic rod (10) away from the displacement sensor (4), the micrometer (11) is fixedly installed on the outer side of the circular box (3), a motor (12) is fixedly installed on the outer side of the installation box (2), the output end of the motor (12) extends to the inside of the installation box (2) and is fixedly connected to a gear cylinder (13), and two gear rings (14) matching the gear cylinder (13) are fixedly connected to the outer side of the circular box (3).

3. The coaxiality detection device for the vertical axis of an aircraft door according to claim 2, characterized in that: The distance adjustment mechanism comprises two rotating rings (15) symmetrically mounted on the inner side of the circular box (3), a plurality of centrally symmetrical supporting rods (36) are fixedly connected between the two rotating rings (15), two symmetrically distributed sliding rods (16) are fixedly connected to the outer side of the sleeve box (8), an arc groove for limiting the sliding of the sliding rods (16) is provided on the outer side of the rotating ring (15), an arc cavity (17) is provided on the outer side of the rotating ring (15) located on the left side of the circular box (3), an arc rack (18) is fixedly connected to the inner wall of the arc cavity (17), a gear (19) matched with the arc rack (18) is arranged on the inner side of the arc cavity (17), and an adjusting bolt (20) extending to the outer side of the mounting box (2) is fixedly connected to the axis of the gear (19).

4. The coaxiality detection device for the vertical axis of an aircraft door according to claim 3, characterized in that: The push shaft mechanism comprises two support plates (21) symmetrically fixedly mounted on the top of the device base (1), two symmetrically distributed guide rods (22) are fixedly connected between the two support plates (21), the guide rods (22) penetrate the installation box (2), a movable plate (23) slidably mounted on the outside of the guide rods (22) is arranged on the left side of the installation box (2), a side of the movable plate (23) close to the installation box (2) is fixedly connected with a push rod (24), a movable plate (25) slidably mounted on the outside of the guide rods (22) is arranged on the right side of the installation box (2), a threaded cylinder (26) is fixedly mounted on the outside of the movable plate (25), and a handle is arranged on the right side of the movable plate (25). (27), the outer side of the handle (27) is fixedly connected with a rotating rod (28), the outer side of the rotating rod (28) is provided with a thread that matches with the threaded barrel (26), the end of the push rod (24) away from the movable plate (23) and the end of the rotating rod (28) away from the handle (27) are both installed with a rubber push block (29), a screw rod (30) is rotatably installed between the two support plates (21), the screw rod (30) passes through the installation box (2), the outer side of the screw rod (30) is fixedly connected with a toothed barrel (31) that matches with the toothed ring (14), and the outer sides of the movable plate (23) and the movable plate (25) are both fixedly connected with a threaded barrel (32) that matches with the screw rod (30).

5. The coaxiality detection device for the vertical axis of an aircraft door according to claim 2, characterized in that: A triangular clamping plate (33) is fixedly connected to the top of the mounting seat (6), and a sliding groove for limiting the sliding of the triangular clamping plate (33) is provided on the outer side of the circular box (3).

6. The coaxiality detection device for the vertical axis of an aircraft door according to claim 2, characterized in that: Both ends of the mounting seat (6) are arc-shaped structures.

7. The coaxiality detection device for the vertical axis of an aircraft door according to claim 2, characterized in that: The installation box (2) is provided with an observation port on one side close to the gear cylinder (13).

8. The coaxiality detection device for the vertical axis of an aircraft door according to claim 4, characterized in that: A connecting plate (34) is fixedly connected between the movable plate 1 (23) and the movable plate 2 (25) and slides through the installation box (2).

9. The coaxiality detection device for the vertical axis of an aircraft door according to claim 4, characterized in that: The rubber stopper (29) is in a conical frustum structure.

10. The coaxiality detection device for the vertical axis of an aircraft cabin door according to claim 4, characterized in that: The two rubber abutment blocks (29) are respectively connected to the abutment rod (24) and the rotating rod (28) by installing nuts (35).

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