A transmission mechanism for an aircraft intake valve assembly

Abstract

The present invention relates to the technical field of reduction transmission devices, and discloses a transmission mechanism for an aircraft intake valve assembly. The transmission mechanism comprises a housing, a worm is rotatably connected to one side of the housing, a worm wheel meshing with the worm is rotatably connected to the other side of the housing, an output shaft is passed through and rotatably connected to the housing, a first gear is fixedly connected to one end of the worm, a second gear is rotatably connected to the housing, a second cover plate is fixedly connected to the side of the housing close to the worm wheel, the output shaft passes through the second cover plate, a first friction disk is fixedly connected to the side of the second cover plate away from the worm wheel, a spline rod is fixedly connected to the output shaft, a sliding disk is splined to the spline rod, and the sliding disk is pressed and matched with the first friction disk. The present invention utilizes the friction between the sliding disk and the first friction disk to provide partial resistance to the output shaft, thereby preventing the vibration force on the output shaft from acting completely between the worm and the worm wheel.

Description

Technical Field

[0001] The invention relates to the technical field of reduction transmission devices and discloses a transmission mechanism for an aircraft air intake valve assembly. Background Art

[0002] The aircraft's intake valve assembly is an adjustable part of the aircraft's intake system, such as adjustable intake vanes, boundary layer extraction system or ram air intake valve. The main purpose of adjusting the intake valve assembly is to optimize the intake efficiency, adapt to different flight conditions and improve engine performance.

[0003] The existing transmission mechanism for adjusting the intake valve assembly includes a deceleration locking mechanism to ensure that the intake valve is fixed in a specific position to prevent accidental movement. The existing technology usually uses a worm gear as a transmission mechanism to adjust the intake valve assembly of the aircraft. When the aircraft flight conditions are very harsh, the intake valve assembly will produce frequent vibrations if the force on the intake valve assembly is unstable, and the vibration generated by the intake valve assembly will directly act on the teeth of the worm gear. The teeth between the worm gear and the worm gear are vibrated for a long time, causing the teeth of the worm gear to wear. This makes it impossible to accurately control the aircraft's intake volume, resulting in the aircraft being unable to adapt to different flight conditions. Summary of the invention

[0004] In order to overcome the shortcomings of the existing transmission device of the aircraft air intake valve assembly, the present invention provides a transmission mechanism for the aircraft air intake valve assembly.

[0005] The technical solution is as follows: A transmission mechanism for an aircraft intake valve assembly, comprising a housing, a worm is rotatably connected to one side of the housing, a worm wheel meshing with the worm is rotatably connected to the other side of the housing, an output shaft is penetrated and rotatably connected to the housing, the output shaft penetrates the worm wheel and the two are spline-connected, one end of the worm is fixedly connected to a first gear, a second gear is rotatably connected to the side of the housing close to the first gear, the first gear meshes with the second gear, a first cover plate is fixedly connected to the side of the housing close to the second gear, the first cover plate penetrates and rotatably connects an input shaft fixed to the second gear, a second cover plate is fixedly connected to the side of the housing close to the worm wheel, the output shaft penetrates the second cover plate, a first friction plate is fixedly connected to the side of the second cover plate away from the worm wheel, a spline rod is fixedly connected to the output shaft, the spline rod is spline-connected to a sliding disk, the sliding disk is extruded and matched with the first friction disk, the sliding disk is provided with a step surface, and a symmetrical hydraulic rod is fixedly connected to the second cover plate, and the telescopic end of the hydraulic rod is slidably matched with the step surface of the sliding disk through a mounting plate.

[0006] Furthermore, the worm wheel is fan-shaped, and limiting step surfaces are provided on both sides of the inner wall of the shell. The symmetrical limiting step surfaces on the shell are used to limit the worm wheel.

[0007] Furthermore, the central axis of the output shaft coincides with the central axes of the first friction disk and the sliding disk, and the opposing surfaces of the first friction disk and the sliding disk are sprayed with friction material.

[0008] Furthermore, a wear indicating mechanism is included, the wear indicating mechanism is arranged on the second cover plate, the wear indicating mechanism is used to indicate the wear degree of the worm and the worm wheel, the wear indicating mechanism includes a sector gear, the sector gear is fixedly connected to the output shaft, the sector gear is located in the housing, a first bracket is fixedly connected to a side of the second cover plate close to the sector gear, the first bracket is rotatably connected to a third gear meshing with the sector gear, the second cover plate is provided with a through hole, the through hole of the second cover plate is sealed and rotatably connected to a rotating plate, the third gear is close to A second friction disk is fixedly connected to one side of the second cover plate, a second bracket is fixedly connected to a side of the second cover plate away from the worm gear, the second bracket is rotatably connected to a rotating sleeve, a one-way clutch is arranged between the rotating sleeve and the rotating plate, the inner ring of the one-way clutch is fixedly connected to the rotating sleeve, a connecting assembly is arranged between the one-way clutch and the rotating plate, the connecting assembly is used to connect the outer ring of the one-way clutch and the third gear, an indicating assembly is arranged on the side of the second cover plate away from the third gear, the indicating assembly is used to indicate the degree of wear between the worm and the worm gear.

[0009] Further, the connecting assembly includes sliding rods with circumferentially equal spacing, the sliding rods with circumferentially equal spacing are all slidably connected to the side walls of the outer ring of the one-way clutch, the sliding rods with circumferentially equal spacing all penetrate the rotating plate, an extrusion ring is fixedly connected between the sliding rods with circumferentially equal spacing, the extrusion ring is extrusion-fitted with the second friction disk, a connecting ring is fixedly connected between the sliding rods with circumferentially equal spacing, a reset member is installed between the connecting ring and the outer ring of the one-way clutch, the sliding disk is fixedly connected to a limiting ring, the limiting ring is limitedly fitted with the connecting ring, the second bracket is fixedly connected to an arc-shaped push rod, and the telescopic end of the arc-shaped push rod is fixedly connected to the rotating sleeve through a mounting plate.

[0010] Furthermore, the one-way clutch is of roller type, which is used to ensure the one-way rotation of the rotating sleeve.

[0011] Furthermore, the indication assembly includes an indication shell, which is fixed to a side of the second cover plate away from the third gear, and a sliding column is sealed and slidably connected inside the indication shell, a first elastic member is fixed between the sliding column and the indication shell, a connecting pipe is connected between the indication shell and the arc-shaped push rod, a one-way valve is installed in the connecting pipe, and hydraulic oil is filled in the arc-shaped push rod and the connecting pipe.

[0012] Furthermore, the indicator shell is made of a transparent material, and scale lines are arranged on the outer side of the indicator shell.

[0013] Further, it also includes a positioning mechanism, which is arranged between the third gear and the second bracket, and is used to limit the position of the third gear. The positioning mechanism includes a threaded rod, which is splined to the third gear, and the threaded rod passes through the extrusion ring, the rotating plate, the inner ring of the one-way clutch and the rotating sleeve. The second bracket is fixed with a threaded sleeve, and the threaded rod is threadedly connected to the threaded sleeve. The second bracket is fixed with a first fixed shell through a mounting plate, and the first fixed shell is slidably connected with a connecting column, and the connecting column is rotatably connected to the threaded rod. A first piston fixed to the connecting column is slidably connected in the first fixed shell, and a second fixed shell is fixed on the mounting plate of the first fixed shell. A second fixed shell is slidably connected with a second piston, and a second elastic member is fixed between the second piston and the second fixed shell. A U-shaped tube is connected between the first fixed shell and the second fixed shell, and the first fixed shell, the U-shaped tube and the second fixed shell are all filled with hydraulic oil. A limiting component is arranged between the second bracket and the shell, and the limiting component is used to control the connection state of the U-shaped tube.

[0014] Further, the limit assembly includes a telescopic rod, which is fixedly connected to the indicator shell, the telescopic end of the telescopic rod passes through the indicator shell and is squeezed and matched with the sliding column, the telescopic rod is filled with hydraulic oil, the first fixed shell is fixedly connected with a telescopic limit rod through a mounting plate, the telescopic rod and the telescopic limit rod are connected through an oil guide pipe, a rotary valve is installed on the U-shaped tube, a torsion spring is fixedly connected between the rotating plate of the rotary valve and the first fixed shell, a through hole is provided on the rotating plate of the rotary valve, and the telescopic end of the telescopic limit rod is limitedly matched with the through hole on the rotating plate of the rotary valve.

[0015] The beneficial effects of the present invention are: 1. The present invention utilizes the friction between the sliding plate and the first friction plate to provide partial resistance to the output shaft, thereby preventing the vibration force exerted on the output shaft from acting completely between the worm and the worm wheel, avoiding the worm and the worm wheel from being subjected to stress for a long time and being seriously worn, thereby improving the service life and working stability of the device.

[0016] 2. The present invention utilizes a one-way clutch to realize one-way contraction of the telescopic end of the arc-shaped push rod, thereby changing the moving position of the sliding column along the indicator shell. The staff can know the wear condition between the worm and the worm wheel according to the position of the sliding column moving in the indicator shell, and there is no need to disassemble the device for inspection, thereby improving the work efficiency of the staff.

[0017] 3. The present invention utilizes the resistance of hydraulic oil flowing through the rotary valve to provide resistance to the movement of the connecting column, increases the rotation resistance of the output shaft and the sector gear, enhances the stability between the worm wheel and the output shaft, avoids the serious friction between the worm wheel and the worm teeth caused by the vibration of the output shaft due to uneven force, improves the transmission stability of the device, and ensures the adjustment accuracy of the aircraft intake valve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a rear-view stereoscopic structural schematic diagram of the present invention;

[0020] Figure 3 is a cross-sectional view of the housing and the first cover plate of the present invention;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the worm gear, sliding disk and other parts of the present invention;

[0022] Figure 5 It is a cross-sectional view of the first friction disc and the sliding disc and other parts of the present invention;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the housing and sector gear and other parts of the present invention;

[0024] Figure 7 It is a rear perspective structural schematic diagram of the second cover plate and the sector gear and other parts of the present invention;

[0025] Figure 8 is a cross-sectional view of the second cover plate and the rotating plate of the present invention;

[0026] Fig. 9 is a cross-sectional view of the third gear and the second friction plate of the present invention;

[0027] Fig.10 It is a cross-sectional view of the rotating plate and one-way clutch and other parts of the present invention;

[0028] Fig.11 A cross-sectional view of an indicator shell of the present invention;

[0029] Fig.12 It is a schematic diagram of the three-dimensional structure of the first fixed shell and the second fixed shell of the present invention;

[0030] Fig.13 is a cross-sectional view of a first fixed shell and a second fixed shell of the present invention;

[0031] Fig.14 It is a three-dimensional structural schematic diagram of the telescopic limit rod and the rotary valve of the present invention.

[0032] Markings in the accompanying drawings: 1: housing, 2: worm, 3: worm wheel, 4: output shaft, 5: first gear, 6: second gear, 7: first cover plate, 8: input shaft, 9: second cover plate, 10: first friction plate, 11: spline rod, 12: sliding plate, 13: hydraulic rod, 14: sector gear, 15: first bracket, 16: third gear, 17: rotating plate, 18: second friction plate, 19: second bracket, 20: rotating sleeve, 21: one-way clutch, 22: sliding rod, 23 : Extrusion ring, 24: Connecting ring, 241: Limiting ring, 25: Arc push rod, 26: Indicating shell, 27: Sliding column, 28: First elastic member, 29: Connecting pipe, 30: One-way valve, 31: Threaded rod, 32: Threaded sleeve, 33: First fixed shell, 34: Connecting column, 35: First piston, 36: Second fixed shell, 37: Second piston, 38: Second elastic member, 39: U-shaped tube, 40: Telescopic rod, 41: Telescopic limiting rod, 42: Rotating valve, 43: Torsion spring. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0034] Research has found that during the adjustment of the aircraft intake valve assembly, if the intake valve assembly is subjected to unstable force, frequent vibrations will occur, and the vibrations generated by the intake valve assembly will directly act on the teeth of the worm gear, causing the teeth of the worm gear to wear, which results in the inability to accurately control the intake volume of the aircraft, causing the aircraft to be unable to adapt to different flight conditions. The following implementation method is used to overcome the above problems.

[0035] Embodiment 1: A transmission mechanism for an aircraft intake valve assembly, such as Figure 1-Figure 6As shown, it includes a shell 1, the upper part of the shell 1 is rotatably connected to a worm 2, a bearing is installed between the shell 1 and the worm 2, the lower part of the shell 1 is rotatably connected to a worm wheel 3 meshing with the worm 2, the shell 1 passes through and is rotatably connected to an output shaft 4, the output shaft 4 is connected to an aircraft intake valve assembly, the output shaft 4 passes through the worm wheel 3 and the two are splined, the worm 2 rotates and meshes with the worm wheel 3, the left end of the worm 2 is fixedly connected to a first gear 5, the left side of the shell 1 is rotatably connected to a second gear 6, the first gear 5 meshes with the second gear 6, the diameter of the first gear 5 is larger than the diameter of the second gear 6, the left side of the shell 1 is fixedly connected to a first cover plate 7, the first cover plate 7 passes through and is rotatably connected to an input shaft 8 fixed to the second gear 6, the input shaft 8 is connected to the main shaft of the driving motor, the front side of the shell 1 is fixedly connected to a second cover plate 9, the output shaft 4 passes through the second cover plate 9, the front side of the second cover plate 9 is fixedly connected to The first friction disc 10 and the output shaft 4 are fixedly connected with a spline rod 11, the output shaft 4 and the spline rod 11 are connected by bolts, the spline rod 11 is spline-connected with a sliding disc 12, the sliding disc 12 is extruded and matched with the first friction disc 10, the central axis of the output shaft 4 coincides with the central axes of the first friction disc 10 and the sliding disc 12, the opposite surfaces of the first friction disc 10 and the sliding disc 12 are sprayed with friction materials, the sliding disc 12 is provided with a step surface, the second cover plate 9 is fixedly connected with two symmetrical hydraulic rods 13, the telescopic ends of the hydraulic rods 13 are slidably matched with the step surfaces of the sliding disc 12 through the mounting plate, the two hydraulic rods 13 are used to adjust the position of the sliding disc 12, so that the sliding disc 12 is extruded on the first friction disc 10, the worm wheel 3 is fan-shaped, and limited step surfaces are provided on both sides of the inner wall of the outer shell 1, and the limited step surfaces on the outer shell 1 are used to limit the worm wheel 3 to improve the stability of the worm wheel 3.

[0036] When using the device, the input shaft 8 is connected to the main shaft of the driving motor, and the output shaft 4 is fixedly connected to the aircraft intake valve assembly. When adjusting the aircraft intake valve, the main shaft of the driving motor drives the input shaft 8 to rotate circumferentially, the input shaft 8 drives the second gear 6 to rotate, the second gear 6 drives the first gear 5 to rotate, the diameter of the first gear 5 is larger than the diameter of the second gear 6, the first gear 5 drives the worm 2 to rotate circumferentially along the outer shell 1, the worm 2 drives the worm wheel 3 to rotate clockwise, the worm wheel 3 drives the output shaft 4 to rotate, and the output shaft 4 adjusts the aircraft intake valve assembly accordingly. The first gear 5 and the second gear 6 are composed of a two-stage reduction structure with the worm 2 and the worm wheel 3, so that the device has the characteristics of large speed ratio and high load-bearing capacity, and the worm 2 and the worm wheel 3 cooperate with each other to have a self-locking function, which improves the stability of the device. When adjusting the aircraft intake valve assembly in the reverse direction, the main shaft of the driving motor is rotated in the reverse direction, so that the worm wheel 3 rotates counterclockwise.

[0037] After the worm wheel 3 rotates to the specified position, the two hydraulic rods 13 are started, and the telescopic ends of the two hydraulic rods 13 are contracted. The telescopic ends of the two hydraulic rods 13 drive the sliding plate 12 to move backward through the mounting plate, and the sliding plate 12 slides backward along the spline rod 11. The sliding plate 12 is then squeezed on the front side of the first friction plate 10, and then the two hydraulic rods 13 are closed, and the sliding plate 12 and the first friction plate 10 always maintain the squeezing force, and the friction force between the sliding plate 12 and the first friction plate 10 is used to provide partial resistance to the output shaft 4, thereby preventing the vibration force on the output shaft 4 from acting completely between the worm 2 and the worm wheel 3, avoiding the worm 2 and the worm wheel 3 from being seriously worn due to long-term stress, thereby improving the service life and working stability of the device.

[0038] When the rotation angle of the output shaft 4 is adjusted again, the two hydraulic rods 13 are started first, and the telescopic ends of the two hydraulic rods 13 drive the sliding plate 12 to move forward along the spline rod 11 through the mounting plate, and the sliding plate 12 is separated from the first friction plate 10. The swing angle of the worm gear 3 and the output shaft 4 is changed by driving the main shaft of the motor, and then the above operation is repeated to make the sliding plate 12 and the first friction plate 10 squeeze and contact again.

[0039] When the staff inspects the wear of the simple transmission mechanism of the aircraft intake valve group, the transmission mechanism needs to be disassembled for inspection, which results in a high workload for the staff. The following implementation method is adopted to solve the above problem.

[0040] Embodiment 2: Based on embodiment 1, Figure 6-Figure 10As shown, it also includes a wear indicating mechanism, which is arranged on the second cover plate 9. The wear indicating mechanism is used to indicate the wear degree of the worm 2 and the worm wheel 3. The wear indicating mechanism includes a sector gear 14, which is fixed to the output shaft 4 and is located in the housing 1. A first bracket 15 is fixed to the rear side of the second cover plate 9, and the first bracket 15 is rotatably connected to a third gear 16 meshing with the sector gear 14. The second cover plate 9 is provided with a through hole, and a rotating plate 17 is sealed and rotatably connected in the through hole of the second cover plate 9. A sealing ring is installed between the second cover plate 9 and the rotating plate 17 to ensure that the second cover plate 9 and the rotating plate 17 are in a sealed state. A second friction disk 18 is fixed to the front side of the third gear 16, and a second bracket is fixed to the front side of the second cover plate 9. 19. The second bracket 19 is located at the front side of the second cover plate 9. The second bracket 19 is rotatably connected with a rotating sleeve 20. A one-way clutch 21 is arranged between the rotating sleeve 20 and the rotating plate 17. The one-way clutch 21 is a roller type and is used to ensure the one-way rotation of the rotating sleeve 20. The one-way clutch 21 is an existing part. The internal structure of the one-way clutch 21 is not shown in the accompanying drawings. The inner ring of the one-way clutch 21 is fixedly connected to the rotating sleeve 20. The central axis of the rotating sleeve 20 coincides with the central axis of the one-way clutch 21. A connecting component is arranged between the one-way clutch 21 and the rotating plate 17. The connecting component is used to connect the outer ring of the one-way clutch 21 and the third gear 16. An indicating component is arranged on the front side of the second cover plate 9. The indicating component is used to indicate the degree of wear between the worm 2 and the worm wheel 3.

[0041] like Figure 5 and Figure 8-Figure 10 As shown, the connecting assembly includes three sliding rods 22 with equal circumferential spacing. The three sliding rods 22 are all slidably connected to the side wall of the outer ring of the one-way clutch 21. The inner ring of the one-way clutch 21 can only rotate counterclockwise. The three sliding rods 22 all penetrate the rotating plate 17. An extrusion ring 23 is fixedly connected between the rear ends of the three sliding rods 22. The extrusion ring 23 is extruded and matched with the second friction disk 18. The opposite sides of the extrusion ring 23 and the second friction disk 18 are sprayed with friction material. The three sliding rods 22 A connecting ring 24 is fixedly connected between the front ends, a reset piece is installed between the connecting ring 24 and the outer ring of the one-way clutch 21, the reset piece between the connecting ring 24 and the outer ring of the one-way clutch 21 is a spring, the sliding plate 12 is fixedly connected with a limit ring 241, the limit ring 241 and the connecting ring 24 are limited, the limit ring 241 is used to push the connecting ring 24 to move backward, the second bracket 19 is fixedly connected with an arc push rod 25, and the telescopic end of the arc push rod 25 is fixedly connected to the rotating sleeve 20 through a mounting plate.

[0042] like Figure 8 and Fig.11As shown, the indication assembly includes an indication shell 26, which is fixed to the front side of the second cover plate 9. A sliding column 27 is sealed and slidably connected inside the indication shell 26. A first elastic member 28 is fixed between the sliding column 27 and the indication shell 26. The first elastic member 28 is configured as a tension spring. The first elastic member 28 is located inside the indication shell 26. A connecting pipe 29 is connected between the indication shell 26 and the arc-shaped push rod 25. A one-way valve 30 is installed in the connecting pipe 29. Hydraulic oil is filled in the arc-shaped push rod 25 and the connecting pipe 29. Under the action of the one-way valve 30, the hydraulic oil in the arc-shaped push rod 25 can only flow outward. The indication shell 26 is configured as a transparent material, and a scale line is configured on the outer side of the indication shell 26. The sliding column 27 is configured as red, so that the staff can observe the position of the sliding column 27 conveniently.

[0043] In the process of the worm gear 3 driving the output shaft 4 to rotate, the output shaft 4 drives the sector gear 14 to rotate, the sector gear 14 drives the third gear 16 to rotate, and the third gear 16 rotates along the first bracket 15. In the initial state, the second friction plate 18 does not contact the extrusion ring 23. When the worm gear 3 and the output shaft 4 rotate to the specified angle, the telescopic ends of the two hydraulic rods 13 drive the sliding plate 12 to move backward and contact the first friction plate 10. In the process of the sliding plate 12 moving backward, the sliding plate 12 drives the limit ring 241 to move backward synchronously, the limit ring 241 squeezes the connecting ring 24 backward, and the connecting ring 24 drives the three sliding rods 22 to move backward. The reset parts of the sliding rods 22 are compressed, and the three sliding rods 22 move backward along the outer ring of the one-way clutch 21. The three sliding rods 22 slide backward along the rotating plate 17, and the three sliding rods 22 drive the extrusion ring 23 to move backward and fit and squeeze the front side of the second friction plate 18.

[0044] When the worm 2 and the worm wheel 3 are worn, a gap appears between the worm 2 and the worm wheel 3. When the output shaft 4 is subjected to unstable force, the output shaft 4 directly acts on the worm 2 through the worm wheel 3, and the worm wheel 3 and the output shaft 4 will rotate in a small range. The worm wheel 3 and the worm 2 will also vibrate due to the unstable force on the output shaft 4. When the output shaft 4 vibrates, relative rotation will occur between the sliding plate 12 and the first friction plate 10, and the friction force of the sliding plate 12 and the first friction plate 10 will provide resistance to the output shaft 4, thereby reducing the vibration between the worm 2 and the worm wheel 3 to a certain extent.

[0045] When the output shaft 4 is vibrated, the output shaft 4 drives the sector gear 14 to move synchronously, and the sector gear 14 drives the third gear 16 to reciprocate. At this time, the extrusion ring 23 and the second friction plate 18 are in an extrusion state. The third gear 16 drives the extrusion ring 23 to rotate synchronously through the second friction plate 18. The extrusion ring 23 drives the three sliding rods 22 to swing back and forth, and the rotating plate 17 reciprocates along the second cover plate 9. The three sliding rods 22 simultaneously drive the connecting ring 24 and the outer ring of the one-way clutch 21 to swing back and forth. When the outer ring of the one-way clutch 21 rotates counterclockwise, the outer ring of the one-way clutch 21 drives the inner ring to rotate, and the one-way clutch 21 When the outer ring rotates clockwise, the outer ring of the one-way clutch 21 cannot drive the inner ring to rotate. When the inner ring of the one-way clutch 21 rotates counterclockwise, the inner ring of the one-way clutch 21 drives the rotating sleeve 20 to rotate counterclockwise. The rotating sleeve 20 drives the telescopic end of the arc push rod 25 to contract through the mounting plate. As long as the output shaft 4 is subjected to unstable force and vibrates, the telescopic end of the arc push rod 25 will contract, and the hydraulic oil in the arc push rod 25 will flow into the indicator shell 26 along the connecting pipe 29. Under the action of the one-way valve 30, the hydraulic oil in the arc push rod 25 can only flow into the indicator shell 26, and the telescopic end of the arc push rod 25 can only contract inward.

[0046] After the hydraulic oil gradually flows into the indicator shell 26, the hydraulic oil pushes the sliding column 27 upward, and the sliding column 27 flows upward along the indicator shell 26, and the first elastic member 28 is stretched. When the staff regularly inspects the device, the staff reads the indication scale indicated by the sliding column 27 on the indication shell 26. The staff can know the wear between the worm 2 and the worm wheel 3 without disassembling the device. When the sliding column 27 moves to the top of the indicator shell 26, it is proved that the worm 2 and the worm wheel 3 in the device need to be inspected and replaced. After the worm 2 and the worm wheel 3 are replaced, the staff resets the telescopic ends of the sliding column 27 and the arc push rod 25, and the staff controls the telescopic ends of the two hydraulic rods 13 to reset, and the first friction disk 10 loses contact with the sliding disk 12. At the same time, under the action of the reset member on the sliding rod 22, the three sliding rods 22 and the extrusion ring 23 and the connecting ring 24 thereon are reset, and the extrusion ring 23 loses contact with the second friction disk 18. Then the staff inspects and replaces the worm 2 and the worm wheel 3.

[0047] Example 3: Based on Example 2, Figure 12-14As shown, it also includes a positioning mechanism, which is arranged between the third gear 16 and the second bracket 19. The positioning mechanism is used to limit the position of the third gear 16. The positioning mechanism includes a threaded rod 31, which is splined to the third gear 16. The threaded rod 31 passes through the extrusion ring 23, the rotating plate 17, the inner ring of the one-way clutch 21 and the rotating sleeve 20. The threaded rod 31 and the rotating sleeve 20 are slidably matched. The second bracket 19 is fixedly connected with a threaded sleeve 32. The threaded rod 31 is threadedly connected with the threaded sleeve 32. When the threaded rod 31 rotates, the threaded rod 31 will slide back and forth along the threaded sleeve 32. The second bracket 19 is fixedly connected with a first fixed shell 33 through a mounting plate. The first fixed shell 33 is slidably connected with a connecting column 34. The connecting column 34 is rotatably connected to the threaded rod 31. When the threaded rod 31 moves along the threaded sleeve 32, the connecting column 34 synchronously slides along the first fixed shell 33. A first piston 35 fixedly connected to the connecting column 34 is connected, and a sealing ring is installed on the outer ring surface of the first piston 35 to increase the sealing between the first fixed shell 33 and the first piston 35. A second fixed shell 36 is fixedly connected to the mounting plate of the first fixed shell 33, and a second piston 37 is slidably connected to the second fixed shell 36. A sealing ring is installed on the outer ring surface of the second piston 37 to increase the sealing between the second fixed shell 36 and the second piston 37. A second elastic member 38 is fixedly connected between the second piston 37 and the second fixed shell 36. The second elastic member 38 is set as a spring. The second elastic member 38 is located in the second fixed shell 36. A U-shaped tube 39 is connected between the first fixed shell 33 and the second fixed shell 36. The first fixed shell 33, the U-shaped tube 39 and the second fixed shell 36 are all filled with hydraulic oil. A limiting component is arranged between the second bracket 19 and the outer shell 1, and the limiting component is used to control the connection state of the U-shaped tube 39.

[0048] like Figure 8 , Fig.11 and Fig.14 As shown, the limit assembly includes a telescopic rod 40, the telescopic rod 40 is fixedly connected to the indicator shell 26, the telescopic end of the telescopic rod 40 passes through the indicator shell 26 and is pressed and matched with the sliding column 27, the telescopic rod 40 is filled with hydraulic oil, the first fixed shell 33 is fixedly connected with a telescopic limit rod 41 through a mounting plate, the telescopic rod 40 and the telescopic limit rod 41 are connected through an oil guide pipe, when the telescopic end of the telescopic rod 40 is contracted, under the flow of hydraulic oil, the telescopic end of the telescopic limit rod 41 is also contracted, and the U-shaped A rotary valve 42 is installed on the tube 39, and a torsion spring 43 is fixedly connected between the rotating plate of the rotary valve 42 and the first fixed shell 33. The rotary valve 42 is initially in an open state, and the torsion spring 43 is in a force storage state. A through hole is provided on the rotating plate of the rotary valve 42, and the telescopic end of the telescopic limit rod 41 is limitedly matched with the through hole on the rotating plate of the rotary valve 42. Under the torsion force of the torsion spring 43, the rotary valve 42 stops rotating after rotating to a specified angle, and the rotary valve 42 still remains in a connected state at this time.

[0049] When adjusting the rotation angle of the worm gear 3 and the output shaft 4, the sector gear 14 drives the third gear 16 to rotate, and the third gear 16 drives the threaded rod 31 to rotate synchronously. When the threaded rod 31 rotates along the threaded sleeve 32, the threaded rod 31 moves forward and backward along the threaded sleeve 32, and at the same time, the threaded rod 31 moves forward and backward along the third gear 16. When the threaded rod 31 rotates, it pushes the first piston 35 to reciprocate along the first fixed shell 33 through the connecting column 34. In the initial state, the rotating valve 42 is in the open state, and the torsion spring 43 is in the stored force state. The hydraulic oil in the first fixed shell 33 and the second fixed shell 36 flows back and forth along the U-shaped tube 39, and the second elastic member 38 is compressed or stretched.

[0050] When the worm gear 3 and the output shaft 4 rotate to a specified angle, the output shaft 4 is subjected to uneven force, causing wear between the worm 2 and the worm wheel 3. During use, the friction between the sliding plate 12 and the first friction plate 10 is used to extend the service life of the worm 2 and the worm wheel 3. As the use time increases, the friction between the sliding plate 12 and the first friction plate 10 decreases, thereby increasing the vibration intensity between the worm 2 and the worm wheel 3. At this time, as the hydraulic oil is injected into the indicator shell 26, the sliding column 27 moves upward along the indicator shell 26, and the sliding column 27 presses the telescopic end of the telescopic rod 40 upward, and the telescopic end of the telescopic rod 40 contracts inwardly. The hydraulic oil in the telescopic rod 40 flows along the oil guide pipe into the telescopic limit rod 41, and the telescopic end of the telescopic limit rod 41 contracts. The telescopic end of the telescopic limit rod 41 loses the limiting cooperation with the through hole on the rotating plate of the rotary valve 42. Subsequently, under the torsion of the torsion spring 43, the rotating plate of the rotary valve 42 swings, so that the connecting area of ​​the rotary valve 42 is reduced, and the rotary valve 42 always remains in a connected state. When the output shaft 4 drives the sector gear 14 to swing due to vibration, the first piston 35 will push the hydraulic oil in the first fixed shell 33 through the rotary valve 42 and the U-shaped tube 39, so that the hydraulic oil flows from the first fixed shell 33 and the second fixed shell 36, and the resistance of the hydraulic oil flowing through the rotary valve 42 is used to provide resistance to the movement of the connecting column 34, thereby increasing the rotation resistance of the output shaft 4 and the sector gear 14, enhancing the stability between the worm wheel 3 and the worm 2, avoiding the serious friction between the teeth of the worm wheel 3 and the worm 2 caused by the vibration of the output shaft 4 due to uneven force, improving the transmission stability of the device, and ensuring the adjustment accuracy of the aircraft intake valve assembly. When the staff inspects the device, the staff will reset the rotary valve 42 and the threaded rod 31 at this time. At the same time, when the sliding column 27 slides downward to reset, the sliding column 27 and the telescopic end of the telescopic rod 40 lose extrusion, and the staff will reset the rotating plate of the rotary valve 42, and the telescopic end of the telescopic limit rod 41 will be again matched with the through hole limit on the rotating plate of the rotary valve 42.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A transmission mechanism for an aircraft air intake valve assembly, comprising a housing (1), a worm (2) being rotatably connected to one side of the housing (1), a worm wheel (3) meshing with the worm (2) being rotatably connected to the other side of the housing (1), an output shaft (4) penetrating the housing (1) and being rotatably connected, the output shaft (4) penetrating the worm wheel (3) and the two being spline-connected, a first gear (5) being fixedly connected to one end of the worm (2), a second gear (6) being rotatably connected to the side of the housing (1) close to the first gear (5), the first gear (5) meshing with the second gear (6), a first cover plate (7) being fixedly connected to the side of the housing (1) close to the second gear (6), the first cover plate (7) penetrating and rotatably connected to an input shaft (8) fixedly connected to the second gear (6), a second cover plate (9) being fixedly connected to the side of the housing (1) close to the worm wheel (3), the output shaft (4) penetrating the second cover plate (9), and the characteristic of the following is that: It also includes a first friction disc (10), the first friction disc (10) being fixedly connected to a side of the second cover plate (9) away from the worm gear (3), the output shaft (4) being fixedly connected to a spline rod (11), the spline rod (11) being spline-connected to a sliding disc (12), the sliding disc (12) being extrusion-fitted with the first friction disc (10), the sliding disc (12) being provided with a step surface, the second cover plate (9) being fixedly connected to a symmetrical hydraulic rod (13), the telescopic end of the hydraulic rod (13) being slidably fitted with the step surface of the sliding disc (12) via a mounting plate; The invention also comprises a wear indicating mechanism, which is arranged on the second cover plate (9) and is used to indicate the degree of wear of the worm (2) and the worm wheel (3). The wear indicating mechanism comprises a sector gear (14), which is fixedly connected to the output shaft (4). The sector gear (14) is located in the housing (1). A first bracket (15) is fixedly connected to a side of the second cover plate (9) close to the sector gear (14). The first bracket (15) is rotatably connected to a third gear (16) meshing with the sector gear (14). The second cover plate (9) is provided with a through hole. A rotating plate (17) is sealed in the through hole of the second cover plate (9) and is rotatably connected thereto. The third gear (16) is close to the second cover plate (16). A second friction plate (18) is fixedly connected to one side of the second cover plate (9), a second bracket (19) is fixedly connected to the side of the second cover plate (9) away from the worm gear (3), the second bracket (19) is rotatably connected to a rotating sleeve (20), a one-way clutch (21) is arranged between the rotating sleeve (20) and the rotating plate (17), the inner ring of the one-way clutch (21) is fixedly connected to the rotating sleeve (20), a connecting component is arranged between the one-way clutch (21) and the rotating plate (17), the connecting component is used to connect the outer ring of the one-way clutch (21) and the third gear (16), and an indication component is arranged on the side of the second cover plate (9) away from the third gear (16), the indication component is used to indicate the degree of wear between the worm (2) and the worm gear (3); The connecting assembly comprises sliding rods (22) with equal circumferential spacing, the sliding rods (22) with equal circumferential spacing are all slidably connected to the side wall of the outer ring of the one-way clutch (21), the sliding rods (22) with equal circumferential spacing all penetrate the rotating plate (17), an extrusion ring (23) is fixedly connected between the sliding rods (22) with equal circumferential spacing, the extrusion ring (23) is extrusion-matched with the second friction plate (18), a connecting ring (24) is fixedly connected between the sliding rods (22) with equal circumferential spacing, a reset member is installed between the connecting ring (24) and the outer ring of the one-way clutch (21), the sliding plate (12) is fixedly connected to a limiting ring (241), the limiting ring (241) is limitedly matched with the connecting ring (24), the second bracket (19) is fixedly connected to an arc push rod (25), the telescopic end of the arc push rod (25) is fixedly connected to the rotating sleeve (20) through a mounting plate; The indicating assembly comprises an indicating housing (26), the indicating housing (26) being fixedly connected to a side of the second cover plate (9) away from the third gear (16), a sliding column (27) being sealed and slidably connected inside the indicating housing (26), a first elastic member (28) being fixedly connected between the sliding column (27) and the indicating housing (26), a connecting pipe (29) being connected between the indicating housing (26) and the arc-shaped push rod (25), a one-way valve (30) being installed in the connecting pipe (29), and hydraulic oil being filled in both the arc-shaped push rod (25) and the connecting pipe (29).

2. A transmission mechanism for an aircraft intake valve assembly according to claim 1, characterized in that: The worm wheel (3) is fan-shaped, and limiting step surfaces are provided on both sides of the inner wall of the outer shell (1). The symmetrical limiting step surfaces on the outer shell (1) are used to limit the position of the worm wheel (3).

3. A transmission mechanism for an aircraft intake valve assembly according to claim 2, characterized in that: The central axis of the output shaft (4) coincides with the central axes of the first friction disc (10) and the sliding disc (12); and the opposing surfaces of the first friction disc (10) and the sliding disc (12) are sprayed with friction material.

4. A transmission mechanism for an aircraft intake valve assembly according to claim 3, characterized in that: The one-way clutch (21) is of roller type and is used to ensure the one-way rotation of the rotating sleeve (20).

5. A transmission mechanism for an aircraft intake valve assembly according to claim 4, characterized in that: The indicator shell (26) is made of a transparent material, and scale lines are provided on the outside of the indicator shell (26).

6. A transmission mechanism for an aircraft intake valve assembly according to claim 5, characterized in that: The invention also comprises a positioning mechanism, the positioning mechanism being arranged between the third gear (16) and the second bracket (19), the positioning mechanism being used to limit the position of the third gear (16), the positioning mechanism comprising a threaded rod (31), the threaded rod (31) being spline-connected to the third gear (16), the threaded rod (31) penetrating the extrusion ring (23), the rotating plate (17), the inner ring of the one-way clutch (21) and the rotating sleeve (20), the second bracket (19) being fixedly connected with a threaded sleeve (32), the threaded rod (31) being threadedly connected to the threaded sleeve (32), the second bracket (19) being fixedly connected with a first fixed shell (33) via a mounting plate, the first fixed shell (33) being slidably connected with a connecting column (34), the connecting column (34) The first fixed housing (33) is rotatably connected to the threaded rod (31); a first piston (35) fixedly connected to the connecting column (34) is slidably connected in the first fixed housing (33); a second fixed housing (36) is fixedly connected to the mounting plate of the first fixed housing (33); a second piston (37) is slidably connected to the second fixed housing (36); a second elastic member (38) is fixedly connected between the second piston (37) and the second fixed housing (36); a U-shaped tube (39) is connected between the first fixed housing (33) and the second fixed housing (36); the first fixed housing (33), the U-shaped tube (39) and the second fixed housing (36) are all filled with hydraulic oil; a limit assembly is provided between the second bracket (19) and the housing (1); the limit assembly is used to control the connection state of the U-shaped tube (39).

7. A transmission mechanism for an aircraft intake valve assembly according to claim 6, characterized in that: The limit assembly comprises a telescopic rod (40), the telescopic rod (40) being fixedly connected to the indicator housing (26), the telescopic end of the telescopic rod (40) passing through the indicator housing (26) and being pressed and matched with the sliding column (27), the telescopic rod (40) being filled with hydraulic oil, the first fixed housing (33) being fixedly connected with a telescopic limit rod (41) via a mounting plate, the telescopic rod (40) and the telescopic limit rod (41) being connected via an oil guide pipe, a rotary valve (42) being installed on the U-shaped tube (39), a torsion spring (43) being fixedly connected between a rotating plate of the rotary valve (42) and the first fixed housing (33), a through hole being arranged on the rotating plate of the rotary valve (42), the telescopic end of the telescopic limit rod (41) being limited and matched with the through hole on the rotating plate of the rotary valve (42).

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