Jacking tool for aircraft maintenance

Abstract

The invention relates to the technical field of aircraft maintenance equipment, and discloses a jacking tool for aircraft maintenance, a limiting assembly is arranged on a jacking assembly, and the limiting assembly is used for clamping an undercarriage of a manned aircraft; the safety assembly is arranged on the inner side of the base and used for limiting the jacking assembly. Limiting of the other end of the second supporting arm can be relieved by pulling the first pull rod upwards to move, in the process that the other end of the second supporting arm resets and moves, the rotating base drives the first pull rod to move in the long through groove through the rotating shaft, and when the other end of the first pull rod abuts against the inner side inclined face of the guide groove, the first pull rod moves downwards; when the other end of the first pull rod is lower than the horizontal plane, the first tension spring drives the first pull rod to reset, so that one end of the first pull rod drives the limiting column to move and abut against the limiting toothed plate through the rotating shaft and the connecting frame, and therefore the device can be conveniently limited when used next time, and the using safety of the device can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of aircraft maintenance equipment technology, specifically to a lifting tool for aircraft maintenance. Background Technology

[0002] In the maintenance of manned aircraft, lifting devices are typically used to raise the aircraft to a certain height to facilitate inspection, maintenance, and repair of its bottom and landing gear. Traditional lifting equipment often suffers from problems such as complex operation, insufficient safety, and limited adaptability. For example, some lifting devices lack stability, potentially causing damage to the aircraft during lifting or lowering; others are difficult to move and cannot quickly respond to different maintenance needs. Furthermore, mainstream lifting equipment relies primarily on hydraulic cylinders as a single power source; when oil lines leak or valves malfunction, the piston rod may retract instantly, causing the aircraft to plummet. Although some devices are equipped with hydraulic locking valves, this solution cannot handle extreme conditions such as oil line ruptures, reducing the safety of manned aircraft maintenance. Therefore, a lifting tool for aircraft maintenance is proposed. Summary of the Invention

[0003] The purpose of this invention is to provide a lifting tool for aircraft maintenance to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a lifting tool for aircraft maintenance, comprising... Two bases, with legs installed at the bottom of the two bases, and a lifting assembly provided at the top of each of the two bases. The lifting assembly is used to lift the manned aircraft, and a limit assembly is provided on the lifting assembly. The limit assembly is used to clamp the landing gear of the manned aircraft. A safety component is disposed on the inner side of the base and is used to limit the lifting component; A movable component, wherein the lifting component is disposed at both ends of the base, and the movable component is used for moving the base; The lifting assembly includes two first arms, two second arms, and a support plate. One end of each of the two first arms is hinged to the top end of the base. The two second arms are respectively hinged to the inner sides of the two first arms. The other ends of the top two sides of the base are fixedly connected to a first guide frame. The other ends of each of the two second arms are fixedly connected to a rotating seat. The outer side of the rotating seat is rotatably connected to a first roller located inside the first guide frame. One end of each of the bottom two sides of the support plate is hinged to one end of each of the two second arms. The other ends of the bottom two sides of the support plate are fixedly connected to a second guide frame. The other ends of each of the two first arms are rotatably connected to a second roller located inside the two second guide frames. A drive assembly is provided between the two first arms and the two second arms.

[0005] Preferably, the drive assembly includes a first connecting column, a second connecting column, and a first hydraulic cylinder. The first connecting column is fixedly connected to one inner end of the two first arms, the second connecting column is fixedly connected to the other inner end of the two second arms, the first hydraulic cylinder is hinged to one side of the first connecting column, and the piston rod of the first hydraulic cylinder is hinged to one side of the second connecting column.

[0006] Preferably, the aforementioned safety component includes a rotating shaft, a connecting frame, and a limiting post. The rotating shaft is rotatably connected to two rotating seats. The connecting frame is fixedly sleeved on the outside of the rotating shaft. The limiting post is fixedly connected to both ends of the connecting frame. Limiting toothed plates are fixedly connected to one end of each of the two inner sides of the base. A long through groove is provided on one side of the first guide frame. One end of the rotating shaft extends to the outside of the rotating seat and passes through the inside of the long through groove. A first pull rod is fixedly connected to one end of the rotating shaft. A first connecting seat is movably sleeved on one outer end of the first pull rod. A collar is movably sleeved on the other outer end of the first pull rod. A first tension spring is fixedly connected between the first connecting seat and the collar. The first tension spring is in a stretched state. A guide wheel is installed on the outside of the collar at the other end of the first pull rod. A reset component is provided on the top of the first guide frame.

[0007] Preferably, the reset assembly includes a first fixing plate and a limiting plate. The limiting plate is fixedly connected to the top of the first guide frame, and the first fixing plate is fixedly connected to one end of the limiting plate. A guide groove is provided on one side of the first fixing plate.

[0008] Preferably, the aforementioned movable assembly includes two fixed cylinders with closed ends, two crankshafts, and two support columns. The two fixed cylinders are respectively fixedly connected to both ends of the base, the two crankshafts are rotatably connected to the inside of the two fixed cylinders, and the two support columns are respectively fixedly sleeved on the ends of the crankshafts extending to the outside of the fixed cylinders. Moving wheels are installed on the two support columns. A through groove is opened on one side of the two fixed cylinders. A second pull rod is movably sleeved on the two crankshafts. One end of the second pull rod extends to the outside of the fixed cylinder through the through groove. A fixed seat is fixedly connected to one end of the base. A guide column movably passes through one side of the fixed seat. One end of the guide column is connected to the ball head of one end of the second pull rod through a ball sleeve. Two fixed columns are fixedly connected to the inside of the base. A second hydraulic cylinder is installed on the side of the two fixed columns that are far apart from each other. The other end of the guide column is fixedly connected to the piston rod of the second hydraulic cylinder. Fixed components are provided at both ends of the rear side of the two fixed cylinders.

[0009] Preferably, the fixing assembly includes two mounting plates, two inserts, and two second tension springs. The two mounting plates are fixedly connected to the rear ends of the fixing cylinder, the two inserts pass through one side of the two mounting plates, the two second tension springs are movably sleeved on the outside of the two inserts, and one end of the two inserts is rotatably connected to an L-shaped plate via a bearing.

[0010] Preferably, a socket is provided on one side of the aforementioned support column, and the socket matches the support column.

[0011] Preferably, one end of the second tension spring is fixedly connected to a bearing on the outer side of one end of the insert, and the other end of the second tension spring is fixedly connected to one side of the mounting plate.

[0012] Preferably, the aforementioned limiting assembly includes two guide rails, two slides, and two second fixing plates. A limiting groove is formed on the top of the base. Both guide rails are fixedly connected to the bottom of the support plate. The two slides are slidably connected to the outer ends of the two guide rails. One side of each of the two second fixing plates extends through the interior of the limiting groove and is fixedly connected to the top of the two slides. A buffer pad is fixedly connected to the opposite side of each of the two second fixing plates. Second connecting seats are fixedly connected to both ends of the two guide rails. A lead screw is rotatably connected between the two second connecting seats. A brake motor is installed on one side of one of the second connecting seats. The output shaft of the brake motor is fixedly connected to one end of the lead screw extending to the outer side of the second connecting seat.

[0013] Preferably, the outer side of the lead screw is provided with opposite threaded ends, and the two slides are respectively connected to the outer side of the lead screw by threads.

[0014] Compared with the prior art, the present invention, employing the above technical solution, has the following technical effects: 1. When the support plate moves upward, the second arm can drive the rotating seat to move, and the rotating seat can drive the rotating shaft to move, so that the connecting frame drives the limiting post to move on the top of the limiting tooth plate. When the rotating shaft does not move, the limiting post is engaged with the teeth of the limiting tooth plate, which can limit the other end of the second arm, prevent the first hydraulic cylinder from going out of control and causing the support plate to fall suddenly, improve the safety of maintenance, and avoid threatening the safety of maintenance personnel.

[0015] 2. By pulling the first pull rod upward, the limiting position of the other end of the second arm can be released. During the reset movement of the other end of the second arm, the rotating seat drives the first pull rod to move inside the long through groove via the rotating shaft. When the other end of the first pull rod abuts against the inner inclined surface of the guide groove, the first pull rod moves downward. When the other end of the first pull rod is lower than the horizontal surface, the first tension spring drives the first pull rod to reset, so that one end of the first pull rod drives the limiting post to move and abut against the limiting tooth plate via the rotating shaft and connecting frame, thereby facilitating the limiting position of the device during the next use and ensuring the safety of the device.

[0016] 3. In this invention, the piston rod of the second hydraulic cylinder pushes the guide column to move inside the fixed base, so that the ball sleeve at one end of the guide column pushes the second pull rod to move through the ball head of the second pull rod. One end of the second pull rod pushes the crankshaft to rotate, and the crankshaft drives the support column to rotate, so that the moving wheel contacts the ground and drives the base to move upward, thereby supporting the base. This facilitates the movement of the device through the moving wheel, making it easier to store and adjust the spacing of the device, and improving the applicability of the device.

[0017] 4. In this invention, the output shaft of the brake motor drives the lead screw to rotate, and the lead screw drives two slides to move closer to each other on the guide rail frame. This causes the two slides to drive the two second fixing plates to move closer to each other. At this time, the two second fixing plates drive the buffer pads to abut against the outside of the landing gear, which can fix the landing gear of the manned aircraft and prevent the manned aircraft from shifting or swaying during the lifting process, thereby improving the stability of the manned aircraft during lifting. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the first support arm structure of the present invention; Figure 3 This is a schematic diagram of the first tie rod structure of the present invention; Figure 4 This is a schematic diagram of the bottom structure of the present invention; Figure 5 This is a schematic diagram of the through-slot structure of the present invention; Figure 6 This is a schematic diagram of the crankshaft structure of the present invention; Figure 7This is a schematic diagram of the L-shaped plate structure of the present invention; Figure 8 This is a schematic diagram of the support plate structure of the present invention.

[0020] Explanation of reference numerals in the attached drawings: 1. Base; 21. First support arm; 22. Second support arm; 23. First guide frame; 24. Rotary seat; 25. First roller; 26. Support plate; 27. Second guide frame; 28. Second roller; 29. ​​First connecting column; 210. Second connecting column; 211. First hydraulic cylinder; 31. Rotating shaft; 32. Connecting frame; 33. Limiting column; 34. Limiting toothed plate; 35. Long through groove; 36. First pull rod; 37. First connecting seat; 38. Collar; 39. First tension spring; 310. Guide wheel; 311. First fixing plate 312. Guide groove; 313. Limiting plate; 41. Fixed cylinder; 42. Crankshaft; 43. Support column; 44. Moving wheel; 45. Second tie rod; 46. Fixed seat; 47. Guide column; 48. Fixed column; 49. Second hydraulic cylinder; 410. Through groove; 51. Limiting groove; 52. Guide rail frame; 53. Slide seat; 54. Second fixed plate; 55. Buffer pad; 56. Lead screw; 57. Second connecting seat; 58. Brake motor; 61. Mounting plate; 62. Insert post; 63. Second tension spring; 64. L-shaped plate; 65. Insertion hole; 7. Support leg. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0023] Example 1 Please see Figure 1-5The present invention provides a technical solution: a lifting tool for aircraft maintenance, comprising two bases 1, with outriggers 7 installed at the bottom of the two bases 1, and a lifting assembly provided at the top of each of the two bases 1. The lifting assembly is used for lifting manned aircraft, and a limit assembly is provided on the lifting assembly for clamping the landing gear of the manned aircraft; a safety assembly is provided on the inner side of the base 1 and is used for limiting the lifting assembly; and a moving assembly is provided at both ends of the lifting assembly and is used for moving the base 1.

[0024] By setting up a lifting assembly, the manned aircraft can be easily inspected and maintained. The lifting assembly includes two first arms 21, two second arms 22, and a support plate 26. One end of each of the two first arms 21 is hinged to the top end of the base 1. The two second arms 22 are respectively hinged to the inner sides of the two first arms 21. The other ends of the top sides of the base 1 are fixedly connected to first guide frames 23. The other ends of each of the two second arms 22 are fixedly connected to rotating seats 24. The outer side of the rotating seats 24 is rotatably connected to first rollers 25 inside the first guide frames 23. One end of the bottom sides of the support plate 26 is respectively hinged to one end of each of the two second arms 22. The other ends of the bottom sides of the support plate 26 are fixedly connected to second guide frames 27. The other ends of each of the two first arms 21 are rotatably connected to second rollers 28 inside the two second guide frames 27. A drive assembly is provided between one arm 21 and two second arms 22. The drive assembly includes a first connecting column 29, a second connecting column 210, and a first hydraulic cylinder 211. The first connecting column 29 is fixedly connected to one inner end of the two first arms 21, and the second connecting column 210 is fixedly connected to the other inner end of the two second arms 22. The first hydraulic cylinder 211 is hinged to one side of the first connecting column 29, and the piston rod of the first hydraulic cylinder 211 is hinged to one side of the second connecting column 210. The extension of the piston rod of the first hydraulic cylinder 211 drives the second connecting column 210 to move, so that the other end of the second arm 22 drives the first roller 25 to move inside the first guide frame 23, and at the same time, the other end of the first arm 21 drives the second roller 28 to move inside the second guide frame 27, thereby driving the support plate 26 to move upward, which can raise the manned aircraft.

[0025] By incorporating safety components, the safety of maintenance can be improved, avoiding threats to the safety of maintenance personnel. The safety components include a rotating shaft 31, a connecting frame 32, and a limiting post 33. The rotating shaft 31 is rotatably connected to two rotating seats 24. The connecting frame 32 is fixedly sleeved on the outside of the rotating shaft 31. The limiting post 33 is fixedly connected to both ends of the connecting frame 32. Limiting toothed plates 34 are fixedly connected to one end of each of the two inner sides of the base 1. A long through groove 35 is provided on one side of the first guide frame 23. One end of the rotating shaft 31 extends to the outside of the rotating seat 24 and passes through the interior of the long through groove 35. A first pull rod 36 is fixedly connected to one end of the rotating shaft 31. A first connecting seat 37 is movably sleeved on one outer end of the first pull rod 36, and a collar 38 is movably sleeved on the other outer end of the first pull rod 36. A first tension spring 39 is fixedly connected between the connecting seat 37 and the collar 38. The first tension spring 39 is in a stretched state and is a wear part that needs to be maintained and replaced regularly. A guide wheel 310 is installed on the outer side of the collar 38 at the other end of the first pull rod 36. During the movement of the second support arm 22, the second support arm 22 can drive the rotating seat 24 to move, and the rotating seat 24 can drive the rotating shaft 31 to move, so that the connecting frame 32 drives the limiting post 33 to move on the top of the limiting tooth plate 34. When the rotating shaft 31 does not move, the limiting post 33 is engaged with the teeth of the limiting tooth plate 34, which can limit the other end of the second support arm 22 and prevent the first hydraulic cylinder 211 from going out of control, causing the support plate 26 to fall suddenly. A reset component is provided on the top of the first guide frame 23. After maintenance is completed, the extension of the first hydraulic cylinder 211 moves the limiting post 33 to the inclined surface of the teeth of the limiting tooth plate 34, and then pulls the first pull rod 36 upward, causing one end of the first pull rod 36 to drive the rotating shaft 31 to rotate. The rotating shaft 31, through the connecting frame 32, drives the two limiting posts 33 away from the top of the limiting tooth plate 34. At this time, the guide wheel 310 at the other end of the first pull rod 36 abuts against the top of the limiting plate 313 under the tension of the first tension spring 39, which can limit the position of the limiting post 33, thereby releasing the limit at the other end of the second support arm 22, and thus controlling the descent of the support plate 26.

[0026] To ensure the safety of the device, the reset assembly includes a first fixing plate 311 and a limiting plate 313. The limiting plate 313 is fixedly connected to the top of the first guide frame 23, and the first fixing plate 311 is fixedly connected to one end of the limiting plate 313. A guide groove 312 is provided on one side of the first fixing plate 311. During the movement of the other end of the second support arm 22, the rotating seat 24 drives the first pull rod 36 to move inside the long through groove 35 through the rotating shaft 31. When the other end of the first pull rod 36 abuts against the inner inclined surface of the guide groove 312, the first pull rod 36 moves downward. When the other end of the first pull rod 36 is lower than the horizontal surface, the first tension spring 39 drives the first pull rod 36 to reset, so that one end of the first pull rod 36 drives the limiting post 33 to move through the rotating shaft 31 and the connecting frame 32 and abuts against the limiting tooth plate 34, thereby facilitating the limiting of the device during the next use.

[0027] The working principle or structural principle is as follows: During lifting, the hydraulic station is started by controlling the switch group. The piston rod of the first hydraulic cylinder 211 extends, driving the second connecting column 210 to move. This causes the other end of the second arm 22 to drive the first roller 25 to move inside the first guide frame 23. At the same time, the other end of the first arm 21 drives the second roller 28 to move inside the second guide frame 27, thereby driving the support plate 26 to move upward, which can raise the manned aircraft to facilitate maintenance. During the movement of the second arm 22, the second arm 22 can drive the rotating seat 24 to move. The rotating seat 24 can drive the rotating shaft 31 to move, causing the connecting frame 32 to drive the limiting column 33 to move on the top of the limiting tooth plate 34. When the rotating shaft 31 does not move, the limiting column 33 is engaged with the teeth of the limiting tooth plate 34, which can limit the other end of the second arm 22, preventing the first hydraulic cylinder 211 from going out of control and causing the support plate 26 to fall suddenly. This improves the safety of maintenance and avoids threats to the safety of maintenance personnel. After maintenance is completed, the extension of the first hydraulic cylinder 211 moves the limiting pin 33 to the inclined surface of the teeth of the limiting tooth plate 34. Then, the first pull rod 36 is pulled upward, causing one end of the first pull rod 36 to drive the rotating shaft 31 to rotate. The rotating shaft 31, through the connecting bracket 32, moves the two limiting pins 33 away from the top of the limiting tooth plate 34. At this time, the guide wheel 310 at the other end of the first pull rod 36 abuts against the top of the limiting plate 313 under the tension of the first tension spring 39, which can limit the position of the limiting pins 33, thereby releasing the limit at the other end of the second support arm 22, and thus controlling the support plate 26. As the second arm 22 moves, the rotating seat 24 drives the first pull rod 36 to move inside the long through groove 35 via the rotating shaft 31. When the other end of the first pull rod 36 abuts against the inner inclined surface of the guide groove 312, the first pull rod 36 moves downward. When the other end of the first pull rod 36 is below the horizontal surface, the first tension spring 39 drives the first pull rod 36 to reset, so that one end of the first pull rod 36 drives the limiting post 33 to move and abut against the limiting tooth plate 34 via the rotating shaft 31 and the connecting frame 32, thereby facilitating the limiting of the device during the next use and ensuring the safety of the device.

[0028] Example 2 Please see Figure 6-7 Unlike Embodiment 1, to improve the ease of use of the device, the moving assembly includes two fixed cylinders 41 with closed ends, two crankshafts 42, and two support columns 43. The two fixed cylinders 41 are respectively fixedly connected to both ends of the base 1. The two crankshafts 42 are rotatably connected to the inside of the two fixed cylinders 41. The two support columns 43 are respectively fixedly sleeved on one end of the crankshafts 42 extending to the outside of the fixed cylinders 41. Moving wheels 44 are installed on the two support columns 43. A through groove 410 is opened on one side of the two fixed cylinders 41. A second pull rod 45 is movably sleeved on the two crankshafts 42. One end of the second pull rod 45 extends to the outside of the fixed cylinder 41 through the through groove 410. A fixed seat 46 is fixedly connected to one end of the inner side of the base 1. A guide post 47 movably passes through one side of the fixed seat 46. One end of the guide post 47 passes through... A ball sleeve is connected to the ball head at one end of the second pull rod 45. Two fixed columns 48 are fixedly connected to the inner side of the base 1. A second hydraulic cylinder 49 is installed on the side of the two fixed columns 48 that are far apart from each other. The other end of the guide column 47 is fixedly connected to the piston rod of the second hydraulic cylinder 49. The piston rods of the two second hydraulic cylinders 49 extend and push the guide column 47 to move inside the fixed seat 46. This causes the ball sleeve at one end of the guide column 47 to push the second pull rod 45 to move via the ball head of the second pull rod 45. One end of the second pull rod 45 pushes the crankshaft 42 to rotate. The crankshaft 42 then drives the support column 43 to rotate, causing the moving wheel 44 to contact the ground and drive the base 1 to move upward, thereby supporting the base 1. Fixed components are provided at both ends of the rear side of the two fixed cylinders 41.

[0029] To ensure the stability of the base 1, the fixing assembly includes two mounting plates 61, two inserts 62, and two second tension springs 63. The two mounting plates 61 are fixedly connected to the rear ends of the fixing cylinder 41, and the two inserts 62 pass through one side of the two mounting plates 61. The two second tension springs 63 are movably sleeved on the outside of the two inserts 62. One end of the two inserts 62 is rotatably connected to an L-shaped plate 64 via a bearing. A insertion hole 65 is provided on one side of the support column 43, and the insertion hole 65 matches the support column 43. One end of the second tension spring 63 is fixedly connected to the insert 61. On the bearing on one side of the 2nd end, the other end of the second tension spring 63 is fixedly connected to one side of the mounting plate 61. The second tension spring 63 is a wear part and needs to be maintained and replaced regularly. When the device needs to be moved, the L-shaped plate 64 is rotated so that one end of the L-shaped plate 64 is disengaged from the outside of the mounting plate 61. During the rotation of the support column 43, when the insertion post 62 moves to the outside of the insertion hole 65, the second tension spring 63 drives the insertion post 62 to reset, so that the insertion post 62 is inserted into the inside of the insertion hole 65, thus completing the fixation of the support column 43 and ensuring that the support column 43 can provide stable support.

[0030] The working principle or structural principle is as follows: When the device needs to be moved, the L-shaped plate 64 is rotated, causing one end of the L-shaped plate 64 to detach from the outside of the mounting plate 61. Then, the hydraulic station is started by controlling the switch group, and the piston rods of the two second hydraulic cylinders 49 extend. The piston rods of the second hydraulic cylinders 49 push the guide column 47 to move inside the fixed base 46, so that the ball sleeve at one end of the guide column 47 pushes the second pull rod 45 to move through the ball head of the second pull rod 45. One end of the second pull rod 45 pushes the crankshaft 42 to rotate, and the crankshaft 42 drives the support column 43 to rotate, so that the moving wheel 44 abuts against the ground and drives the base 1 to move upward, thereby supporting the base 1. When the insertion post 62 moves to the outside of the insertion hole 65, the second tension spring 63 drives the insertion post 62 to reset, so that the insertion post 62 is inserted into the inside of the insertion hole 65, thus completing the fixation of the support column 43 and ensuring that the support column 43 can provide stable support. This facilitates the movement of the device through the moving wheel 44, making it easier to store and adjust the spacing of the device, and improving the applicability of the device.

[0031] Example 3 Please see Figure 8Unlike embodiments 1 and 2, in order to improve the stability of the manned aircraft's lifting and prevent damage to the manned aircraft, the limiting assembly includes two guide rails 52, two slides 53, and two second fixing plates 54. A limiting groove 51 is provided on the top of the base 1. Both guide rails 52 are fixedly connected to the bottom of the support plate 26. The two slides 53 are slidably connected to the outer ends of the two guide rails 52. One side of each of the two second fixing plates 54 extends through the limiting groove 51 and is fixedly connected to the top of the two slides 53. A buffer pad 55 is fixedly connected to the opposite side of each of the two second fixing plates 54. Second connecting seats 57 are fixedly connected to both ends of the two guide rails 52. A lead screw 56 is rotatably connected between the two second connecting seats 57. A brake motor 58 is installed on one side of one of the second connecting seats 57. The output shaft of the brake motor 58 is fixedly connected to one end of the lead screw 56 extending to the outer side of the second connecting seat 57. The outer side of the lead screw 56 is provided with... The two slides 53, each with opposite threaded ends, are threadedly connected to the outer side of the lead screw 56. The output shaft of the brake motor 58 drives the lead screw 56 to rotate, causing the two slides 53 to move closer together on the guide rail frame 52. The lead screw 56 requires regular cleaning and lubrication. A dust cover can be installed on the outer side of the lead screw 56 to ensure its cleanliness and smooth operation. This causes the two slides 53 to move the two second fixing plates 54 closer together. At this time, the two second fixing plates 54 drive the buffer pads 55 to abut against the outer side of the landing gear, which can fix the landing gear of the manned aircraft and prevent the manned aircraft from shifting or swaying during the lifting process, thus improving the stability of the manned aircraft during lifting. The model of the brake motor 58 is 4IK25GN-CB. The brake motor 58 is also called a holding brake motor. Its structure and working principle are existing technologies and will not be described in detail here.

[0032] The working principle or structural principle is as follows: When the manned aircraft needs to be repaired, it is moved to the top of the two support plates 26, so that the two ends of the landing gear of the manned aircraft are placed on the top of the two support plates 26 respectively. Then, the brake motor 58 is started by controlling the switch group. The output shaft of the brake motor 58 drives the lead screw 56 to rotate. The lead screw 56 drives the two slides 53 to move closer to each other on the guide rail frame 52, so that the two slides 53 drive the two second fixing plates 54 to move closer to each other. At this time, the two second fixing plates 54 drive the buffer pads 55 to abut against the outside of the landing gear, which can fix the landing gear of the manned aircraft and prevent the manned aircraft from shifting or shaking during the lifting process, thereby improving the safety of the manned aircraft lifting.

[0033] Those skilled in the art will understand that the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention can be combined or combined in various ways without departing from the spirit and teachings of the present invention. All such combinations and / or combinations fall within the scope of the present invention.

Claims

1. A lifting tool for aircraft maintenance, characterized in that, include Two bases (1), with legs (7) installed at the bottom of the two bases (1), and a lifting assembly provided at the top of each of the two bases (1). The lifting assembly is used to lift the manned aircraft, and a limit assembly is provided on the lifting assembly. The limit assembly is used to clamp the landing gear of the manned aircraft. A safety component is disposed on the inner side of the base (1) and is used to limit the lifting component; A movable component, wherein the lifting component is disposed at both ends of the base (1), and the movable component is used for moving the base (1); The lifting assembly includes two first arms (21), two second arms (22), and a support plate (26). One end of each of the two first arms (21) is hinged to the top of the base (1), and the two second arms (22) are respectively hinged to the inner sides of the two first arms (21). The other ends of the top sides of the base (1) are fixedly connected to a first guide frame (23), and the other ends of each of the two second arms (22) are fixedly connected to a rotating seat (24). The outer side of the rotating seat (24) is located on the first guide frame. A first roller (25) is rotatably connected to the inner side of the support plate (23). One end of the bottom of the support plate (26) is hinged to one end of the two second arms (22). The other end of the bottom of the support plate (26) is fixedly connected to the two guide frames (27). The other end of the two first arms (21) is rotatably connected to the two second guide frames (27). A drive assembly is provided between the two first arms (21) and the two second arms (22).

2. The lifting tool for aircraft maintenance according to claim 1, characterized in that, The drive assembly includes a first connecting column (29), a second connecting column (210), and a first hydraulic cylinder (211). The first connecting column (29) is fixedly connected to one end of the inner side of the two first arms (21), and the second connecting column (210) is fixedly connected to the other end of the inner side of the two second arms (22). The first hydraulic cylinder (211) is hinged to one side of the first connecting column (29), and the piston rod of the first hydraulic cylinder (211) is hinged to one side of the second connecting column (210).

3. The lifting tool for aircraft maintenance according to claim 1, characterized in that, The safety assembly includes a rotating shaft (31), a connecting frame (32), and a limiting post (33). The rotating shaft (31) is rotatably connected to two rotating seats (24). The connecting frame (32) is fixedly sleeved on the outside of the rotating shaft (31). The limiting post (33) is fixedly connected to both ends of the connecting frame (32). Limiting tooth plates (34) are fixedly connected to one end of each of the two inner sides of the base (1). A long through groove (35) is provided on one side of the first guide frame (23). One end of the rotating shaft (31) extends to the outside of the rotating seat (24) and passes through the inside of the long through groove (35). One end of the rotating shaft (31) is fixedly connected to a first pull rod (36), one end of the first pull rod (36) is movably sleeved with a first connecting seat (37), the other end of the first pull rod (36) is movably sleeved with a collar (38), a first tension spring (39) is fixedly connected between the first connecting seat (37) and the collar (38), the first tension spring (39) is in a stretched state, a guide wheel (310) is installed on the outside of the collar (38) at the other end of the first pull rod (36), and a reset component is provided on the top of the first guide frame (23).

4. The lifting tool for aircraft maintenance according to claim 3, characterized in that, The reset assembly includes a first fixing plate (311) and a limiting plate (313). The limiting plate (313) is fixedly connected to the top of the first guide frame (23). The first fixing plate (311) is fixedly connected to one end of the limiting plate (313). A guide groove (312) is provided on one side of the first fixing plate (311).

5. The lifting tool for aircraft maintenance according to claim 1, characterized in that, The movable assembly includes two fixed cylinders (41) with closed ends, two crankshafts (42), and two support columns (43). The two fixed cylinders (41) are fixedly connected to both ends of the base (1), and the two crankshafts (42) are rotatably connected to the inside of the two fixed cylinders (41). The two support columns (43) are fixedly sleeved on one end of the crankshafts (42) extending to the outside of the fixed cylinders (41). The two support columns (43) are equipped with movable wheels (44). A through groove (410) is opened on one side of the two fixed cylinders (41). A second pull rod (45) is movably sleeved on the two crankshafts (42). One end of the second pull rod (45) passes through... The through groove (410) extends to the outside of the fixed cylinder (41). A fixed seat (46) is fixedly connected to one end of the inner side of the base (1). A guide post (47) is movably passed through one side of the fixed seat (46). One end of the guide post (47) is connected to the ball head of one end of the second pull rod (45) through a ball sleeve. Two fixed posts (48) are fixedly connected to the inner side of the base (1). A second hydraulic cylinder (49) is installed on the side of the two fixed posts (48) that are far apart from each other. The other end of the guide post (47) is fixedly connected to the piston rod of the second hydraulic cylinder (49). Fixed components are provided at both ends of the rear side of the two fixed cylinders (41).

6. The lifting tool for aircraft maintenance according to claim 5, characterized in that, The fixing assembly includes two mounting plates (61), two inserts (62), and two second tension springs (63). The two mounting plates (61) are fixedly connected to the rear ends of the fixing cylinder (41), the two inserts (62) pass through one side of the two mounting plates (61), and the two second tension springs (63) are movably sleeved on the outside of the two inserts (62). One end of the two inserts (62) is rotatably connected to an L-shaped plate (64) through a bearing.

7. A lifting tool for aircraft maintenance according to claim 6, characterized in that, A socket (65) is provided on one side of the support column (43), and the socket (65) matches the support column (43).

8. A lifting tool for aircraft maintenance according to claim 6, characterized in that, One end of the second tension spring (63) is fixedly connected to the bearing on the outer side of one end of the insert (62), and the other end of the second tension spring (63) is fixedly connected to one side of the mounting plate (61).

9. A lifting tool for aircraft maintenance according to claim 1, characterized in that, The limiting assembly includes two guide rails (52), two slides (53), and two second fixing plates (54). The top of the base (1) has a limiting groove (51). The two guide rails (52) are fixedly connected to the bottom of the support plate (26). The two slides (53) are slidably connected to the outer ends of the two guide rails (52). One side of the two second fixing plates (54) passes through the interior of the limiting groove (51) and is fixedly connected to the top of the two slides (53). A buffer pad (55) is fixedly connected to the opposite side of the two second fixing plates (54). The two ends of the two guide rails (52) are fixedly connected to second connecting seats (57). A lead screw (56) is rotatably connected between the two second connecting seats (57). A brake motor (58) is installed on one side of one of the second connecting seats (57). The output shaft of the brake motor (58) is fixedly connected to one end of the lead screw (56) extending to the outer side of the second connecting seat (57).

10. A lifting tool for aircraft maintenance according to claim 9, characterized in that, The lead screw (56) has opposite threaded ends on its outer side, and the two slides (53) are respectively connected to the outer side of the lead screw (56) by threads.

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