Aircraft artificial leg design structure

Abstract

The utility model belongs to the field of airplane auxiliary dragging tools, and relates to an airplane artificial leg design structure which comprises a main artificial leg and a tail artificial leg. A main landing gear of the aircraft is replaced by the main artificial leg, and a tail landing gear of the aircraft is replaced by the tail artificial leg; the main artificial leg comprises a frame, a movable wheel assembly, a rotating wheel assembly, an aircraft connecting assembly, a steering device and a supporting assembly. The movable wheel assembly and the rotating wheel assembly are grounded, the frame is horizontally arranged above the movable wheel assembly and the rotating wheel assembly, and the supporting assembly and the steering device are connected among the movable wheel assembly, the rotating wheel assembly and the frame; the aircraft connecting assembly is connected to the upper portion of the frame and used for being connected with an aircraft nose bracket. The problem of dragging the aircraft is solved, the aircraft body does not need to be transported to other places to be repaired, and the aircraft can be conveniently moved in a factory after the main artificial leg and the tail artificial leg are installed. The airplane dragging device is simple in operation, easy in direction control when an airplane is dragged, large in rotating angle, labor-saving and high in dragging stability.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of aircraft auxiliary towing tool, and particularly relates to a design structure of aircraft artificial leg. BACKGROUND

[0002] During the repair process, the main landing gear and the tail landing gear of the aircraft need to be disassembled, and the aircraft body can only be parked on the aircraft support after the disassembly, and cannot be moved, which is inconvenient for repair. Sometimes, the aircraft body needs to be transported to other places for repair. In order to ensure that the aircraft can be conveniently moved in the factory area, a kind of artificial leg is designed to replace the main landing gear and the tail landing gear. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a design structure of aircraft artificial leg to solve the problem that the aircraft cannot be moved during the repair process and is inconvenient for repair.

[0004] The technical scheme of the application is: a design structure of aircraft artificial leg, comprising a main artificial leg and a tail artificial leg; the main artificial leg replaces the main landing gear of the aircraft, and the tail artificial leg replaces the tail landing gear of the aircraft; the main artificial leg comprises a frame, a movable wheel assembly, a foot assembly, a swivel wheel assembly, an aircraft connecting assembly, a steering device and a support assembly; the movable wheel assembly and the swivel wheel assembly are grounded, the foot assembly is connected with the movable wheel assembly and the swivel wheel assembly, and is used for stopping the main artificial leg; the frame is horizontally arranged above the movable wheel assembly and the swivel wheel assembly; the support assembly and the steering device are both connected between the movable wheel assembly, the swivel wheel assembly and the frame, and are respectively used for providing support and swiveling; the aircraft connecting assembly is connected above the frame, and is used for connecting the aircraft nose support; the tail artificial leg comprises a roller mechanism, a shell and a support mechanism; the shell is arranged outside the support mechanism and the roller mechanism and supports the support mechanism and the roller mechanism.

[0005] Preferably, the frame comprises a bottom frame, a threaded connecting seat, a cross pipe, a first bearing seat and a hook, and is integrally welded into shape; the bottom frame is of a rectangular structure and is welded by square steel; there are four groups of threaded connecting seats which are symmetrically arranged on both sides of the bottom frame, and the threaded connecting seats are used for threaded cooperation with the support assembly; the cross pipe is horizontally welded at the bottom of the bottom frame and is used for connecting the aircraft connecting assembly; the first bearing seat is welded at the vertex position of the bottom frame and is used for bearing connection with the movable wheel assembly and the swivel wheel assembly; the hook is welded outside the first bearing seat and is used for hanging the steering device; the support assembly cooperates with the threaded connecting seat of the frame; the support assembly comprises the foot assembly, a first split pin, a first deep groove ball bearing, a baffle and a first thrust ball bearing; the first split pin, the first deep groove ball bearing, the baffle and the first thrust ball bearing cooperate with the first bearing seat.

[0006] Preferably, the foot assembly comprises a lever, an adjusting screw, an end cap, a fixed seat and a rubber sleeve; the adjusting screw is vertically arranged and threadedly connected with the threaded connecting seat, the lever is inserted into the upper end of the adjusting screw, the end cap is horizontally arranged at the lower part of the adjusting screw and is sleeved on the adjusting screw, the rubber sleeve is arranged below the end cap and the middle part of the rubber sleeve is ball-jointed with the lower end of the adjusting screw, the outer side is threadedly connected with the end cap; the lever can drive the adjusting screw to move upward or downward, when moving downward, the rubber sleeve can contact the ground; the first deep groove ball bearing and the first thrust ball bearing are respectively arranged in the first bearing seat at the front and rear ends of the bottom frame, and the first split pin and the stopper are used to fix the movable wheel assembly and the rotating wheel assembly by cooperating with the first deep groove ball bearing, the first thrust ball bearing and the first bearing seat.

[0007] Preferably, the movable wheel assembly comprises a first yoke, a front wheel, a first adjusting washer, a first bolt, a first flat washer and a first split pin; the front wheel is rotationally connected in the first yoke, and the first adjusting washer is connected between the first yoke and the front wheel; the first split pin is coaxially connected in the front wheel; the first bolt and the first nut are connected between the two ends of the front wheel and the first yoke, and the first yoke is fixed by tightening the first nut; the first flat washer is inserted between the first nut and the side wall of the first yoke; the front wheel is installed on the bearing seat through the shaft at the upper part of the first yoke, the first bearing seat is installed with the first thrust ball bearing at the lower end and the first deep groove ball bearing at the upper end; a thread is formed on the shaft at the upper end of the first yoke, the first yoke is installed by tightening the first nut to press the stopper, lock the position of the movable wheel and the first bearing seat, and then the first split pin is installed to complete the installation of the movable wheel.

[0008] Preferably, the rotating wheel assembly comprises a second yoke, a rear wheel, a second adjusting washer and a second flat washer; the rear wheel is rotationally connected in the second yoke, and the second adjusting washer is connected between the second yoke and the rear wheel; the second bolt and the second nut are connected between the two ends of the rear wheel and the second yoke, and the second yoke is fixed by tightening the second nut; the second flat washer is inserted between the second nut and the side wall of the second yoke; the second split pin is coaxially connected in the rear wheel, the rotating radius of the rear wheel is small, and the rear wheel can be omnidirectionally rotated and installed in the opposite direction of the heading; the installation mode of the rotating wheel assembly is the same as that of the movable wheel assembly.

[0009] Preferably, the steering device comprises a connecting rod, a first spring washer, a third nut and a fork; the connecting rod is hooked on the hook of the frame, is installed on the first bolt of the movable wheel assembly and the first bolt of the rotating wheel assembly through the fork, the third bolt and the third nut are connected between the connecting rod and the fork, and the connecting rod is connected to the non-threaded part of the third bolt, the steering device is pulled by loosening the third nut; the first spring washer is connected between the third nut and the side wall of the connecting rod.

[0010] Preferably, the aircraft connecting assembly comprises a lower bearing, a hexagonal head bolt, a fourth flat washer, a second spring washer and a hexagonal thick nut; the lower bearing is a semi-circular ring steel structural member; when installing the main artificial leg, the cross tube is moved to the stress position, and then the lower bearing is tightened with the upper bearing of the aircraft through the hexagonal head bolt, the fourth flat washer, the second spring washer and the hexagonal thick nut, thereby clamping the cylindrical surface on both sides of the cross tube.

[0011] Preferably, the roller mechanism comprises a wheel train, a third yoke, a wheel, a third adjusting washer, a fourth bolt, a fourth adjusting washer and a second hexagonal slotted nut; the third yoke is inserted into the wheel and the wheel train, and a third bearing connected with the wheel is arranged on the third yoke, and a protruding part is arranged at both ends of the third yoke; a fourth split pin is coaxially connected in the wheel; the third adjusting washer is connected between the protruding part of the third yoke and the third bearing, and is used for fine adjustment of the third bearing; the fourth bolt is threadedly connected to one end of the third yoke, and the second hexagonal slotted nut is threadedly connected to the other end of the third yoke, and the third yoke is tightened on the wheel train in cooperation with the fourth bolt;

[0012] A stepped shaft is arranged at the top of the third yoke, the bottom of the stepped shaft is connected with the wheel train, and the top of the stepped shaft is connected with the shell, the diameter of the stepped shaft gradually decreases from the bottom to the top, a second thrust ball bearing is connected at the position of the first step at the bottom of the third yoke, and a bearing cover is arranged on the upper part of the second thrust ball bearing;

[0013] A second deep groove ball bearing is arranged at the position of the third step away from the bottom of the stepped shaft, a small bushing and a large bushing are connected at the position of the fourth step away from the bottom of the stepped shaft, the small bushing is connected with the inner ring of the second deep groove ball bearing, and the large bushing is connected with the outer ring of the second deep groove ball bearing; a third deep groove ball bearing is connected at the position of the fifth step away from the bottom of the stepped shaft, and the third deep groove ball bearing is connected with the end faces of the large bushing and the small bushing, a fourth washer is connected at the position of the sixth step away from the bottom of the stepped shaft, an external thread is connected at the position of the sixth step away from the bottom of the stepped shaft, two locking round nuts are threadedly connected on the external thread, and are used for locking the parts on the stepped shaft; a locking stop washer is arranged between the two locking round nuts.

[0014] Preferably, the shell comprises a fixed joint, a connecting pipe, a connecting lug and a second bearing seat; a plurality of connecting seats are arranged on the fixed joint, and a plurality of groups of hexagonal head bolts, fifth washers, hexagonal slot nuts and third split pins are connected between each connecting seat and the aircraft tail lug;

[0015] The connecting pipe is integrally and coaxially connected with the fixed joint, the connecting lug and the second bearing seat are arranged at the end of the connecting pipe away from the fixed joint, the stepped shaft of the third yoke is arranged in the inner hole of the second bearing seat, and the upper end face of the outer ring of the third deep groove ball bearing abuts against the end face of the inner hole of the second bearing seat.

[0016] The outer thread of the second bearing seat is provided with a first locking nut, and the lower end surface of the second deep groove ball bearing outer ring can be fixed by tightening the first locking nut; the top of the first locking nut is provided with a round nut stop washer, and an adjusting nut is further arranged between the round nut stop washer and the shell for adjusting the tightness; the round nut stop washer is arranged on the upper end surface of the first locking nut to realize locking.

[0017] Preferably, the supporting mechanism comprises a left screw rod, a left screw sleeve, a supporting pipe, a right screw sleeve and a right screw rod; the left screw rod, the supporting pipe and the right screw rod are coaxially arranged, the two ends of the supporting pipe are threadedly connected with the left screw rod and the right screw rod respectively, the thread directions of the left screw sleeve and the right screw sleeve are opposite, and the thread directions of the left screw rod and the right screw rod are opposite; the left screw sleeve is threadedly connected to the left screw rod and abuts against the supporting pipe, the right screw sleeve is threadedly connected to the right screw rod and abuts against the supporting pipe, and a movable handle is inserted into the middle part of the supporting pipe; rotating the movable handle drives the left screw rod and the right screw rod to move towards each other or away from each other; the outer end of the left screw rod is connected with a connecting lug through a fifth bolt, a hexagonal groove nut, a fourth flat washer and a fourth open pin, and the right screw rod is connected with a tail fork ear bolt of an airplane through the same fifth bolt, hexagonal groove nut, fourth flat washer and fourth open pin.

[0018] The aircraft artificial leg design structure of the application solves the problem of dragging the aircraft, does not need to transport the fuselage to other places for repair, and can be conveniently moved in the factory area after the main artificial leg and the tail artificial leg are installed. The utility model has the advantages of simple operation, easy control of direction when dragging the aircraft, large turning angle, labor saving and high dragging stability. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions provided by the application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the application.

[0020] Figure 1 It is a schematic diagram of the overall structure of the main artificial leg of the application;

[0021] Figure 2 It is a three-view diagram of the frame structure of the application;

[0022] Figure 3 It is a schematic diagram of the foot assembly structure of the application;

[0023] Figure 4 It is a schematic diagram of the movable wheel assembly structure of the application;

[0024] Figure 5 It is a schematic diagram of the rotating wheel assembly structure of the application;

[0025] Figure 6The schematic diagram of the structure of the turning device of the present application;

[0026] Figure 7 The schematic diagram of the overall structure of the tail artificial leg of the present application;

[0027] Figure 8 The schematic diagram of the structure of the rolling wheel mechanism of the present application; Figure 7 The enlarged view of part A;

[0028] Figure 9 The schematic diagram of the overall structure of the support mechanism of the present application.

[0029] Figure 10 The overall structure of the shell of the present application;

[0030] Figure 11 The partial sectional view of the shell structure of the present application;

[0031] Figure 12 The schematic diagram of the overall structure of the support mechanism of the present application.

[0032] 1. turning device; 2. frame; 3. movable wheel assembly; 4. swivel wheel assembly; 5. foot assembly; 6. bottom frame; 7. threaded connection seat; 8. cross pipe; 9. first bearing seat; 10. hook; 11. first split pin; 12. first deep groove ball bearing; 13. baffle; 14. first thrust ball bearing; 15. lever; 16. adjusting lead screw; 17. end cover; 18. fixing seat; 19. rubber sleeve; 20. first yoke; 21. front wheel; 22. first adjusting washer; 23. first bolt; 24. first flat washer; 25. first nut; 26. first split pin; 27. second yoke; 29. rear wheel; 30. second adjusting washer; 31. second flat washer; 32. second bolt; 33. second nut; 34. second split pin; 35. connecting rod; 36. first spring washer; 37. third nut; 38. fork; 39. third bolt; 40. lower bearing bush; 41. hexagonal head bolt; 42. wheel train; 43. third yoke; 44. wheel; 45. third adjusting washer; 46. fourth bolt; 47. fourth adjusting washer; 48. second hexagonal split nut; 49. third bearing; 50. fourth split pin; 51. stepped shaft; 52. second thrust ball bearing; 53. bearing cover; 54. second deep groove ball bearing; 55. large bushing; 56. small bushing; 57. third deep groove ball bearing; 58. fourth washer; 59. locking round nut; 60. locking stop washer; 61. shell; 62. fixing joint; 63. connecting pipe; 64. connecting lug; 65. second bearing seat; 66. third split pin; 67. first locking nut; 68. round nut stop washer; 69. support mechanism; 70. left lead screw; 71. left screw sleeve; 72. support pipe; 73. right screw sleeve; 74. right lead screw; 75. movable handle; 76. fifth bolt; 77. adjusting nut. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0034] An aircraft artificial leg design structure comprises a main artificial leg and a tail artificial leg. The main artificial leg replaces the main landing gear of an aircraft, and the tail artificial leg replaces the tail landing gear of the aircraft.

[0035] As Figure 1 , the main artificial leg comprises a frame 2, a movable wheel assembly 3, a foot assembly 5, a swivel wheel assembly 4, an aircraft connecting assembly, a steering device 1 and a support assembly. The movable wheel assembly 3 and the swivel wheel assembly 4 are grounded, the foot assembly 5 is connected with the movable wheel assembly 3 and the swivel wheel assembly 4, and is used for main artificial leg locking, the frame 2 is horizontally arranged above the movable wheel assembly 3 and the swivel wheel assembly 4, and the support assembly and the steering device 1 are both connected between the movable wheel assembly 3, the swivel wheel assembly 4 and the frame 2, and are respectively used for providing support and swiveling; the aircraft connecting assembly is connected above the frame 2, and is used for connecting an aircraft nose bracket.

[0036] In combination Figure 2 , the frame 2 comprises a bottom frame 6, a threaded connecting seat 7, a cross pipe 8, a first bearing seat 9 and a hook 10, and is integrally welded into shape. The bottom frame 6 is of a rectangular structure and is welded from square steel; the threaded connecting seat 7 is provided in four groups and symmetrically on both sides of the bottom frame 6, and is used for threaded cooperation with the support assembly. The cross pipe 8 is horizontally welded at the bottom of the bottom frame 6, and is used for connecting the aircraft connecting assembly; the first bearing seat 9 is welded at the vertex position of the bottom frame 6, and is used for bearing connection with the movable wheel assembly 3 and the swivel wheel assembly 4, and the hook 10 is welded outside the first bearing seat 9, and is used for hooking the steering device 1.

[0037] The support assembly cooperates with the threaded connecting seat 7 of the frame 2, and comprises the foot assembly 5, a first split pin 11, a first deep groove ball bearing 12, a baffle 13 and a first thrust ball bearing 14. The first split pin 11, the first deep groove ball bearing 12, the baffle 13 and the first thrust ball bearing 14 cooperate with the first bearing seat 9.

[0038] In combination Figure 3The ground leg assembly 5 comprises a lever 15, an adjusting screw 16, an end cover 17, a fixing seat 18 and a rubber sleeve 19. The adjusting screw 16 is vertically arranged and threadedly connected with the threaded connecting seat. The lever 15 is inserted into the upper end of the adjusting screw 16. The end cover 17 is horizontally arranged at the lower part of the adjusting screw 16 and is sleeved on the adjusting screw 16. The rubber sleeve 19 is arranged below the end cover 17. The middle part of the rubber sleeve 19 is ball-jointed with the lower end of the adjusting screw 16. The outer side is threadedly connected with the end cover 17. The lever 15 can drive the adjusting screw 16 to move upward or downward. When moving downward, the rubber sleeve 19 can contact the ground to prevent the airplane from moving in the static state. When moving upward, the rubber sleeve 19 can be separated from the ground to tow the airplane.

[0039] The first deep groove ball bearing 12 and the first thrust ball bearing 14 are arranged in the first bearing seat 9 at the front and rear ends of the bottom frame 6 respectively. The split pin and the blocking piece 13 are used to fix the movable wheel assembly 3 and the slewing wheel assembly 4 in cooperation with the first deep groove ball bearing 12, the first thrust ball bearing 14 and the first bearing seat 9.

[0040] Specifically, as shown in Figure 4 The movable wheel assembly 3 comprises a first yoke 20, a front wheel 21, a first adjusting washer 22, a first bolt 23, a first flat washer 24 and a first split pin 26. The front wheel 21 is rotatably connected in the first yoke 20. The first adjusting washer 22 is connected between the first yoke 20 and the front wheel 21 and is used to adjust the distance between the front wheels 21. The first split pin 26 is coaxially connected in the front wheel 21. The first bolt 23 and the first nut 25 are connected between the two ends of the front wheel 21 and the first yoke 20. The first yoke 20 is fixed by tightening the first nut 25. The first flat washer 24 is inserted between the first nut 25 and the side wall of the first yoke 20.

[0041] The front wheel 21 has a large radius of rotation, which is convenient for adjusting the direction and can rotate in all directions. The front wheel 21 is installed in the positive direction of the airplane heading. The shaft at the upper part of the first yoke 20 is installed on the first bearing seat 9. The first bearing seat 9 is installed with the first thrust ball bearing 14 at the lower end and the first deep groove ball bearing 12 at the upper end. The shaft at the upper end of the first yoke 20 is provided with a thread. The first yoke 20 is installed by tightening the first nut 26 to press the blocking piece 13, lock the position of the movable wheel and the first bearing seat 9, and then install the first split pin to complete the installation of the movable wheel.

[0042] See Figure 5The swivel wheel assembly 4 comprises a second yoke 27, a rear wheel 29, a second adjusting washer 30 and a second flat washer 31. The rear wheel 29 is rotatably connected to the second yoke 27, and the second adjusting washer 30 is connected between the second yoke 27 and the rear wheel 29 for adjusting the distance between the rear wheel 29. The second bolt 32 and the second nut 33 are connected between the two ends of the rear wheel 29 and the second yoke 27, and the second yoke 27 is fixed by tightening the second nut 33, and the fourth split pin 50 is inserted into the rear end of the second bolt 32; the second flat washer 31 is inserted between the second nut 33 and the side wall of the second yoke 27. The second split pin 34 is coaxially connected in the rear wheel 29, the rear wheel 29 has a small radius of rotation and can rotate in all directions, and is installed in the opposite direction of the heading direction. The installation mode of the swivel wheel assembly 4 is the same as that of the movable wheel assembly 3.

[0043] See Figure 6 The steering device 1 comprises a connecting rod 35, a first spring washer 36, a third nut 37 and a fork 38. The connecting rod 35 is hooked on the hook 10 of the frame 2, is installed on the first bolt 25 of the movable wheel assembly 3 and the second bolt 32 of the swivel wheel assembly 4 through the fork 38, the third bolt 39 and the third nut 37 are connected between the connecting rod 35 and the fork 38, and the connecting rod 35 is connected to the non-threaded part of the third bolt 39. When the third nut 37 is loosened, the steering device 1 is pulled to complete the control of the direction of the movable wheel assembly 3 and the swivel wheel assembly 4. The first spring washer 36 is connected between the third nut 37 and the side wall of the connecting rod 35 to facilitate tightening of the third nut 37.

[0044] In combination Figure 1 The aircraft connecting assembly comprises a lower bearing bush 40, a hexagonal head bolt 41, a fourth flat washer, a second spring washer and a hexagonal thick nut. The lower bearing bush 40 is a semicircular ring steel structural member. When the main artificial leg is installed, the cross pipe 8 is moved to the stress position, and then the lower bearing bush 40 is tightened with the upper bearing bush of the aircraft through the hexagonal head bolt 41, the fourth flat washer, the second spring washer and the hexagonal thick nut, so as to clamp the cylindrical surface on both sides of the cross pipe 8, thereby achieving fixation.

[0045] The main artificial leg is connected with the aircraft through the frame 2, the aircraft connecting assembly and the supporting assembly, is moved through the movable wheel assembly 3 and the swivel wheel assembly 4, and the steering and control of the front wheel 21 and the rear wheel 29 are realized through the steering device 1, so as to realize stable traction of the aircraft.

[0046] In combination Figures 7-8 The tail artificial leg comprises a roller mechanism, a shell 61 and a supporting mechanism 69. The shell 61 is arranged outside the supporting mechanism 69 and the roller mechanism and supports the supporting mechanism 69 and the roller mechanism.

[0047] In combination Figure 9The roller mechanism comprises a wheel train 42, a third wheel fork 43, a wheel 44, a third adjusting washer 45, a fourth bolt 46, a fourth adjusting washer 47 and a second hexagonal slotted nut 48. The third wheel fork 43 is inserted into the wheel 44 and the wheel train 42, and the third wheel fork 43 is provided with a third bearing 49 connected with the wheel 44, and the third wheel fork 43 is provided with a protruding part at both ends, which can be hung and pulled by a traction rod. The fourth split pin 50 is coaxially connected in the wheel 44. The third adjusting washer 45 is connected between the protruding part of the third wheel fork 43 and the third bearing 49, and is used for fine adjustment of the third bearing 49. The fourth bolt 46 is threadedly connected to one end of the third wheel fork 43, and the second hexagonal slotted nut 48 is threadedly connected to the other end of the third wheel fork 43, and cooperates with the fourth bolt 46 to tighten the third wheel fork on the wheel train 42. Preferably, the second split pin 34 is inserted in the radial direction of the end of the third wheel fork 43, so as to further fix the third wheel fork 43.

[0048] The top of the third wheel fork 43 is provided with a stepped shaft 51, the bottom of the stepped shaft 51 is connected with the wheel train 42, and the top of the stepped shaft 51 is connected with the shell 61, the diameter of the stepped shaft 51 from the bottom to the top decreases in turn, the second thrust ball bearing 52 is connected at the position of the first step at the bottom of the third wheel fork 43, and the bearing cover 53 is installed on the upper part of the second thrust ball bearing 52.

[0049] The stepped shaft 51 is provided with the second deep groove ball bearing 54 at the position away from the third step at the bottom, the small bushing 56 and the large bushing 55 are connected at the position away from the fourth step at the bottom of the stepped shaft 51, the small bushing 56 is connected with the inner ring of the second deep groove ball bearing 54, and the large bushing 55 is connected with the outer ring of the second deep groove ball bearing 54. The third deep groove ball bearing 57 is connected at the position away from the fifth step at the bottom of the stepped shaft 51, and the third deep groove ball bearing 57 is connected with the end faces of the large bushing 55 and the small bushing 56, the fourth washer 58 is connected at the position away from the sixth step at the bottom of the stepped shaft 51, the stepped shaft 51 is provided with an external thread at the position away from the sixth step at the bottom, and two locking round nuts 59 are threadedly connected on the external thread, which are used for locking the parts on the stepped shaft 51. The locking stop washer 60 is arranged between the two locking round nuts 59, which plays an insurance role.

[0050] In combination Figures 10-11 The shell 61 comprises a fixed joint 62, a connecting pipe 63, a connecting lug 64 and a second bearing seat 65. The fixed joint 62 is provided with a plurality of connecting seats, and each connecting seat is connected with a plurality of groups of hexagonal head bolts 41, fifth washers, hexagonal slotted nuts and third split pins 66 between the fixed joint 62 and the connecting lug 64, so as to ensure stable fixation.

[0051] The connecting pipe 63 is integrally coaxially connected with the fixed joint 62, the connecting lug 64 and the second bearing seat 65 are arranged at the end of the connecting pipe 63 away from the fixed joint 62, the stepped shaft 51 of the third yoke 43 is arranged in the inner hole of the second bearing seat 65, and the upper end surface of the outer ring of the third deep groove ball bearing 57 abuts against the end surface of the inner hole of the second bearing seat 65.

[0052] The first locking nut 67 is arranged on the outer thread of the second bearing seat 65, the lower end surface of the outer ring of the second deep groove ball bearing 54 is fixed by tightening the first locking nut 67, so that the gear train 42 and the shell 61 are locked. The top of the first locking nut 67 is provided with a round nut stop washer 68, and an adjusting nut 77 is further arranged between the round nut stop washer 68 and the shell 61, which is used for adjusting the tightness. The round nut stop washer 68 is arranged on the upper end surface of the first locking nut 67 to realize locking.

[0053] In combination Figure 12 The supporting mechanism 69 comprises a left screw rod 70, a left screw sleeve 71, a supporting pipe 72, a right screw sleeve 73 and a right screw rod 74. The left screw rod 70, the supporting pipe 72 and the right screw rod 74 are coaxially arranged, the two ends of the supporting pipe 72 are threadedly connected with the left screw rod 70 and the right screw rod 74 respectively, the thread directions of the left screw sleeve 71 and the right screw sleeve 73 are opposite, the thread directions of the left screw rod 70 and the right screw rod 74 are opposite, the left screw sleeve 71 is threadedly connected with the left screw rod 70 and abuts against the supporting pipe 72, and then the left screw sleeve 71 is tightened by a locking nut; the right screw sleeve 73 is threadedly connected with the right screw rod 74 and abuts against the supporting pipe 72, and is tightened by a locking nut; and the middle part of the supporting pipe 72 is inserted with a movable handle 75. The movable handle 75 is rotated to drive the left screw rod 70 and the right screw rod 74 to move towards each other or away from each other, so as to increase or decrease the length of the supporting pipe 72. The outer end of the left screw rod 70 is connected with the connecting lug 64 through a fifth bolt 76, a hexagonal groove nut, a fourth flat washer and a fourth split pin 50, and the right screw rod 74 is connected with the aircraft tail yoke lug bolt through the same fifth bolt 76, hexagonal groove nut, fourth flat washer and fourth split pin 50.

[0054] Through the above design, the problem of dragging the aircraft is solved, the fuselage does not need to be transported to other places for repair, and the aircraft can be conveniently moved in the factory area after the main artificial leg and the tail artificial leg are installed. The utility model has the advantages of simple operation, easy control of direction, large turning angle, labor saving and high dragging stability.

[0055] As a specific embodiment, the utility model also includes an artificial leg installation method, and the specific steps are as follows:

[0056] Step 1. Install the main artificial leg

[0057] Step 1: Adjust the height of the aircraft nose bracket so that the cross pipe 8 on the main artificial leg contacts the aircraft.

[0058] Step 2: tighten the lower bearing 40 with the upper bearing of the airplane by hexagonal head bolt 41, fourth flat washer, second spring washer, hexagonal thick nut, and clamp the cylindrical surface of the cross pipe 8 on both sides.

[0059] Step 2. Install the tail prosthesis

[0060] Step 1: adjust the height of the airplane tail bracket, make the fixed joint 62 align with the bolt hole of the airplane tail fork ear, and install the hexagonal head bolt 41, the fifth washer, the hexagonal slot nut and the third split pin 66.

[0061] Step 2: rotate the movable handle 75, adjust the length of the left screw sleeve 71, make the hole on one side of the support rod align with the hole of the airplane tail fork ear, and install the fifth bolt 76, the hexagonal slot nut, the fourth flat washer and the fourth split pin 50.

[0062] Step 3: complete the movement of the main prosthesis by pulling the steering device 1, and then complete the towing of the airplane. If you want to move from the tail prosthesis direction, hang the traction rod on the tail prosthesis for towing.

[0063] Finally, it should be pointed out that: the utility model discloses the embodiment in the attached drawing, only relate to the structure involved in the embodiment of the present disclosure, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the utility model can be combined with each other;

[0064] Finally: the above only for the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. An aircraft prosthetic leg design structure, characterized by: The main false leg and the tail false leg; the main false leg replaces the main landing gear of the airplane, and the tail false leg replaces the tail landing gear of the airplane; the main false leg comprises a frame (2), a movable wheel assembly (3), a ground foot assembly (5), a swivel wheel assembly (4), an airplane connecting assembly, a steering device (1) and a supporting assembly; the movable wheel assembly (3) and the swivel wheel assembly (4) are grounded, the ground foot assembly (5) is connected with the movable wheel assembly (3) and the swivel wheel assembly (4) and is used for stopping the main false leg, the frame (2) is horizontally arranged above the movable wheel assembly (3) and the swivel wheel assembly (4), and the supporting assembly and the steering device (1) are both connected between the movable wheel assembly (3), the swivel wheel assembly (4) and the frame (2) and are respectively used for providing support and swiveling; the airplane connecting assembly is connected above the frame (2) and is used for connecting the airplane nose bracket; the tail false leg comprises a roller mechanism, a shell (61) and a supporting mechanism (69); the shell (61) is arranged outside the supporting mechanism (69) and the roller mechanism and supports the supporting mechanism (69) and the roller mechanism.

2. The design of a prosthetic leg for an airplane as claimed in claim 1, characterized in that: The frame (2) comprises a bottom frame (6), a threaded connecting seat (7), a horizontal pipe (8), a first bearing seat (9) and a hook (10) and is integrally welded; the bottom frame (6) is of a rectangular structure and is welded by square steel; the threaded connecting seat (7) is arranged on both sides of the bottom frame (6) in four groups and symmetrically and is used for being screwed with the supporting assembly; the horizontal pipe (8) is horizontally welded at the bottom of the bottom frame (6) and is used for connecting the airplane connecting assembly; the first bearing seat (9) is welded at the top position of the bottom frame (6) and is used for being connected with the bearings of the movable wheel assembly (3) and the swivel wheel assembly (4); the hook (10) is welded outside the first bearing seat (9) and is used for hanging the steering device (1); the supporting assembly is matched with the threaded connecting seat (7) of the frame (2), and the supporting assembly comprises the ground foot assembly (5), a first open pin (11), a first deep groove ball bearing (12), a baffle (13) and a first thrust ball bearing (14); the first open pin (11), the first deep groove ball bearing (12), the baffle (13) and the first thrust ball bearing (14) are matched with the first bearing seat (9).

3. The design of a prosthetic leg for an airplane as claimed in claim 2, characterized in that: The foot assembly (5) comprises a lever (15), an adjusting screw (16), an end cover (17), a fixing base (18) and a rubber sleeve (19); the adjusting screw (16) is vertically arranged and threadedly connected with a threaded connecting seat; the lever (15) is inserted into the upper end of the adjusting screw (16); the end cover (17) is horizontally arranged at the lower part of the adjusting screw (16) and sleeved on the adjusting screw (16); the rubber sleeve (19) is arranged below the end cover (17) and the middle part of the rubber sleeve (19) is ball-jointed with the lower end of the adjusting screw (16), and the outer side is threadedly connected with the end cover (17); the adjusting screw (16) can be driven to move upward or downward by rotating the lever (15), and the rubber sleeve (19) can be contacted with the ground when moving downward; the first deep groove ball bearing (12) and the first thrust ball bearing (14) are respectively arranged in the first bearing seat (9) at the front and rear ends of the bottom frame (6); the first split pin (11) and the baffle (13) are used for fixing the movable wheel assembly (3) and the rotating wheel assembly (4) by cooperating with the first deep groove ball bearing (12), the first thrust ball bearing (14) and the first bearing seat (9).

4. The design of a prosthetic leg for an airplane as claimed in claim 3, characterized in that: The movable wheel assembly (3) comprises a first fork (20), a front wheel (21), a first adjusting washer (22), a first bolt (23), a first flat washer (24) and a first split pin (26); the front wheel (21) is rotatably connected in the first fork (20), and the first adjusting washer (22) is connected between the first fork (20) and the front wheel (21); the first split pin (26) is coaxially connected in the front wheel (21); the first bolt (23) and a first nut (25) are connected between the two ends of the front wheel (21) and the first fork (20), and the first fork (20) is fixed by tightening the first nut (25); the first flat washer (24) is inserted between the first nut (26) and the side wall of the first fork (20); the front wheel (21) is installed on the first bearing seat (9) through the shaft at the upper part of the first fork (20), the first thrust ball bearing (14) is installed at the lower end of the first bearing seat (9), and the first deep groove ball bearing (12) is installed at the upper end of the first bearing seat (9); a thread is formed on the shaft at the upper end of the first fork (20), and the first fork (20) is installed by tightening the first nut (26) to press the baffle (13) and lock the position of the movable wheel and the first bearing seat (9), and then the first split pin is installed to complete the installation of the movable wheel.

5. The design of a prosthetic leg for an airplane as recited in claim 1, wherein: The swivel wheel assembly (4) comprises a second yoke (27), a rear wheel (29), a second adjusting washer (30) and a second flat washer (31); the rear wheel (29) is rotatably connected in the second yoke (27), the second adjusting washer (30) is connected between the second yoke (27) and the rear wheel (29); the second bolt (32) and the second nut (33) are connected between the two ends of the rear wheel (29) and the second yoke (27), and the second nut (33) is tightened to fix the second yoke (27); the second flat washer (31) is inserted between the second nut (33) and the side wall of the second yoke (27); the rear wheel (29) is coaxially connected with the second cotter pin (34) in the rear wheel (29), the rotation radius of the rear wheel (29) is small, and the rear wheel (29) can rotate universally and is installed in the opposite direction of the heading direction; the installation mode of the swivel wheel assembly (4) is the same as that of the movable wheel assembly (3).

6. The design of a prosthetic leg for an airplane as recited in claim 1, wherein: The steering device (1) comprises a connecting rod (35), a first spring washer (36), a third nut (37) and a fork-shaped piece (38); the connecting rod (35) is hooked on the hook (10) of the frame (2) and is installed on the first bolt (25) of the movable wheel assembly (3) and the first bolt (25) of the swivel wheel assembly (4) through the fork-shaped piece (38), the third bolt (39) and the third nut (37) are connected between the connecting rod (35) and the fork-shaped piece (38), the connecting rod (35) is connected to the non-threaded part of the third bolt (39), and the steering device (1) is pulled when the third nut (37) is loosened; the first spring washer (36) is connected between the third nut (37) and the side wall of the connecting rod (35).

7. The design of a prosthetic leg for an airplane as recited in claim 1, wherein: The aircraft connecting assembly comprises a lower bearing bush (40), a hexagonal head bolt (41), a fourth flat washer, a second spring washer and a hexagonal thick nut; the lower bearing bush (40) is a semicircular ring steel structural member; when the main artificial leg is installed, the cross pipe (8) is moved to the stress position, and then the lower bearing bush (40) is tightened with the upper bearing bush of the aircraft through the hexagonal head bolt (41), the fourth flat washer, the second spring washer and the hexagonal thick nut, so as to clamp the cylindrical surface on both sides of the cross pipe (8).

8. The design of a prosthetic leg for an airplane as recited in claim 1, wherein: The roller mechanism comprises a wheel train (42), a third yoke (43), a wheel (44), a third adjusting washer (45), a fourth bolt (46), a fourth adjusting washer (47) and a second hexagonal slotted nut (48); the third yoke (43) is inserted into the wheel (44) and the wheel train (42), the third yoke (43) is provided with the third bearing (49) connected with the wheel (44), and the two ends of the third yoke (43) are provided with protruding parts; the fourth cotter pin (50) is coaxially connected in the wheel (44); the third adjusting washer (45) is connected between the protruding part of the third yoke (43) and the third bearing (49) and is used for fine adjustment of the third bearing (49); the fourth bolt (46) is threadedly connected to one end of the third yoke (43), the second hexagonal slotted nut (48) is threadedly connected to the other end of the third yoke (43), and the third yoke is tightened on the wheel train (42) by cooperation of the fourth bolt (46). The top of the third fork (43) is provided with a stepped shaft (51), the bottom of the stepped shaft (51) is connected with the wheel train (42), the top is connected with the shell (61), the diameter of the stepped shaft (51) from the bottom to the top is gradually reduced, a second thrust ball bearing (52) is connected at the position of the first step at the bottom of the third fork (43), the upper part of the second thrust ball bearing (52) is provided with a bearing cover (53); The position of the third step from the bottom of the stepped shaft (51) is provided with a second deep groove ball bearing (54), the position of the fourth step from the bottom of the stepped shaft (51) is connected with a small bushing (56) and a large bushing (55), the small bushing (56) is connected with the inner ring of the second deep groove ball bearing (54), the large bushing (55) is connected with the outer ring of the second deep groove ball bearing (54); the position of the fifth step from the bottom of the stepped shaft (51) is connected with a third deep groove ball bearing (57), and the third deep groove ball bearing (57) is connected with the end face of the large bushing (55) and the small bushing (56), the position of the sixth step from the bottom of the stepped shaft (51) is connected with a fourth washer (58), the position of the sixth step from the bottom of the stepped shaft (51) is connected with an external thread, two locking round nuts (59) are threadedly connected on the external thread for locking the parts on the stepped shaft (51); a locking stop washer (60) is arranged between the two locking round nuts (59).

9. The design of a prosthetic leg for an airplane as claimed in claim 8, characterized in that: The shell (61) comprises a fixed joint (62), a connecting pipe (63), a connecting lug (64) and a second bearing seat (65); a plurality of connecting seats are arranged on the fixed joint (62), and each connecting seat is connected with the lug between the tail of the airplane through a plurality of groups of hexagonal head bolts (41), a fifth washer, a hexagonal groove nut and a third open pin (66); The connecting pipe (63) is integrally and coaxially connected with the fixed joint (62), the connecting lug (64) and the second bearing seat (65) are both arranged at the end of the connecting pipe (63) away from the fixed joint (62), the stepped shaft (51) of the third fork (43) is mounted in the inner hole of the second bearing seat (65), and the upper end face of the outer ring of the third deep groove ball bearing (57) abuts against the end face of the inner hole of the second bearing seat (65); A first locking nut (67) is mounted on the external thread of the second bearing seat (65), and the lower end face of the outer ring of the second deep groove ball bearing (54) can be fixed by tightening the first locking nut (67); a round nut stop washer (68) is arranged at the top of the first locking nut (67), an adjusting nut (77) is further arranged between the round nut stop washer (68) and the shell (61) for adjusting the tightness; the round nut stop washer (68) is mounted on the upper end face of the first locking nut (67) to realize locking.

10. The design of a prosthetic leg for an airplane as defined in claim 8, wherein: The support mechanism (69) comprises a left screw rod (70), a left screw sleeve (71), a support tube (72), a right screw sleeve (73) and a right screw rod (74); the left screw rod (70), the support tube (72) and the right screw rod (74) are coaxially arranged, the two ends of the support tube (72) are respectively threadedly connected with the left screw rod (70) and the right screw rod (74), the thread directions of the left screw sleeve (71) and the right screw sleeve (73) are opposite, the thread directions of the left screw rod (70) and the right screw rod (74) are opposite, the left screw sleeve (71) is threadedly connected on the left screw rod (70) and abuts against the support tube (72), the right screw sleeve (73) is threadedly connected on the right screw rod (74) and abuts against the support tube (72), and a movable handle (75) is inserted in the middle of the support tube (72); the movable handle (75) is rotated to drive the left screw rod (70) and the right screw rod (74) to move towards each other or away from each other; the outer end of the left screw rod (70) is connected with the connecting lug (64) through the fifth bolt (76), a hexagonal groove type nut, a fourth flat washer, a fourth split pin (50), and the right screw rod (74) is connected with the airplane tail fork lug bolt through the same fifth bolt (76), hexagonal groove type nut, fourth flat washer and fourth split pin (50).

Images