Spiral jacking type undercarriage mounting device

Abstract

The utility model discloses a spiral jacking type undercarriage installation device, and belongs to the technical field of aviation aircraft wheel and undercarriage system integration tests. The undercarriage installation device comprises a supporting guide rail, an upper rocker arm supporting frame, a supporting column supporting frame and a wheel shaft supporting frame. The supporting guide rail is located at the bottom of the device, the upper rocker arm supporting frame, the supporting column supporting frame and the axle supporting frame are installed on the supporting guide rail, and the upper rocker arm supporting frame is fixed in position and adjustable in height. The position and the height of the supporting column supporting frame are adjustable; the axle supporting frame is adjustable in position and fixed in height. An undercarriage airplane wheel with an airplane wheel is placed on the device, the undercarriage can be conveniently aligned with a test bed interface through adjustment of the supporting frames, and installation is convenient. The problems that when an integrated system test is carried out on an aircraft landing gear and an aircraft wheel, adjustment, butt joint and installation of an interface of the landing gear and a test bed are difficult, time and labor are wasted, and the falling risk exists are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of integrated test technology for aircraft wheels and landing gear systems, and particularly relates to a screw jack type landing gear installation device. Background Art

[0002] With the development of aviation test technology, the original method of testing wheels alone on an inertia test bench can no longer meet the matching requirements of wheels and landing gears under real working conditions. In order to simulate real working conditions as much as possible under test conditions, it is necessary to conduct aviation wheel and landing gear integrated system test verification in the laboratory.

[0003] Compared with the previous test method of wheels alone on an inertia test bench, the integrated system test requires installing the landing gear with wheels on the integrated test bench for overall test and measurement. The landing gear system integrated test bench is generally of a frame structure with limited internal space. When installing the landing gear with wheels as a whole, it is necessary to use a hoist to lift the landing gear with wheels to be tested into the frame structure of the test bench as a whole and install the interfaces. The disadvantages of this method are as follows: First, it is difficult to determine the position of the lifting point during installation, and it is difficult to ensure the stability of the test piece during the installation process, and it is difficult to dock the interface between the test piece to be tested and the test bench; Second, the distance between the lifting point and the landing gear is too large, and once there is a problem with the lifting tool during the installation process, it is easy to cause a safety accident of falling; Third, the labor intensity of workers during the installation process is large and the efficiency is low.

[0004] Therefore, it is necessary to design a special installation device. Summary of the Invention

[0005] Technical problems to be solved: Aiming at the deficiencies of the prior art, the present invention provides a screw jack type landing gear installation device. The device is provided with an upper rocker support frame, a strut support frame, and a wheel axle support frame on the support guide rail. Among them, the position of the upper rocker support frame is fixed and the height is adjustable; the position and height of the strut support frame are both adjustable; the position of the wheel axle support frame is adjustable and the height is fixed. By placing the landing gear with wheels on this device and adjusting each support frame, it is convenient to align the landing gear with the test bench interface for installation. The present invention solves the problems that when conducting an integrated system test on an aircraft landing gear and wheels, it is difficult to adjust, dock, and install the interface between the landing gear and the test bench, which is time-consuming and laborious, and there is a risk of falling.

[0006] The technical solution of the present invention is: A screw jack type landing gear installation device, including a support guide rail, an upper rocker support frame, a strut support frame, and a wheel axle support frame;

[0007] The support guide rail is located at the bottom of the device and is used for installing other components;

[0008] The upper rocker arm support frame is fixed on the support guide rail, located at one end of the support guide rail, and is used to support the upper rocker arm of the landing gear; the support height of the upper rocker arm support frame is adjustable;

[0009] The wheel axle support frame is shiftably mounted on the support guide rail, located at the other end of the support guide rail, and is used to horizontally support the wheel axle of the landing gear; the installation position of the wheel axle support frame can be slidably adjusted and locked in position along the support guide rail;

[0010] The strut support frame is shiftably mounted on the support guide rail, located between the upper rocker arm support frame and the wheel axle support frame, and is used to support the bottom end of the strut of the landing gear; the installation position of the strut support frame can be slidably adjusted and locked in position along the support guide rail, and the support height of the strut support frame is adjustable.

[0011] A further technical solution of the present invention is that: the support guide rail includes two roller guide rails that are parallel to each other and aligned at both ends; the roller guide rail includes a guide rail body and rollers; the guide rail body is axially provided with an inner groove with a rectangular cross-section, and a plurality of the rollers are rotatably mounted in the inner groove in a linear arrangement to form the rolling elements of the guide rail; the bottom of the guide rail is provided with a first limit groove and a second limit groove, which are respectively used to define the installation positions of the strut support frame and the wheel axle support frame.

[0012] A further technical solution of the present invention is that: the upper rocker arm support frame includes a support seat and a first height adjustment mechanism, the bottom of the support seat is fixed on the support guide rail, and a first height adjustment mechanism is installed on its top; the first height adjustment mechanism includes: a first support plate, a first positioning pin and a first adjustment bolt; the first support plate is vertically slidably mounted on the top of the support seat through a plurality of first positioning pins, and the top end of the first support plate is provided with a concave portion for supporting the upper rocker arm; the first adjustment bolt is threadedly connected to the first support plate and is used to adjust the support height of the first support plate.

[0013] A further technical solution of the present invention is that: the support seat is a frame structure, including a bottom plate, a top plate and support rods, the bottom plate is fixedly connected to the support guide rail; the top plate is located directly above the center of the bottom plate and is parallel to the bottom plate; the four support rods are used to fixedly connect the four corner positions of the bottom plate and the top plate.

[0014] A further technical solution of the present invention is as follows: The first support plate is a T-shaped plate, including a first horizontal plate arranged horizontally and a first vertical plate vertically fixed on the first horizontal plate. A first concave portion is coaxially provided at the center of the top of the first vertical plate for supporting the upper rocker arm. Four first positioning pins are provided, symmetrically arranged on both sides of the first vertical plate, and respectively inserted into through holes corresponding to the four corners of the first horizontal plate, playing a guiding role in adjusting the height of the first support plate. The bottom end of the first positioning pin is fixedly connected to the top plate by threads. Two first adjusting bolts are provided, respectively located between two first positioning pins on both sides of the first vertical plate. The first adjusting bolts are threadedly connected to the first horizontal plate. By screwing the first adjusting bolts, the distance between the first horizontal plate and the top plate can be adjusted, and thus the support height of the first support plate can be adjusted.

[0015] A further technical solution of the present invention is as follows: The first height adjusting mechanism further includes a first bearing chamber. The two first bearing chambers correspond to the two first adjusting bolts one by one. The first bearing chamber includes a first bearing seat and a first bearing. The first bearing seat is fixed on the top plate by mounting screws. The first bearing is installed in the bearing seat. The first bearing is simultaneously located directly below the first adjusting bolt, and the inner ring of the first bearing is in interference fit connection with the lower end of the first adjusting bolt coaxially.

[0016] A further technical solution of the present invention is as follows: The strut support frame includes a sliding bottom plate, a first limiting plate, a first slider, and a second height adjusting mechanism.

[0017] The sliding bottom plate is horizontally mounted on the support guide rail. First sliders are provided at the bottom surfaces of both ends thereof and are respectively embedded in the inner grooves of the two track bodies and are in sliding contact with the rollers.

[0018] The two first limiting plates are fixedly arranged in parallel on the bottom surface of the sliding bottom plate and are respectively located inside the roller tracks at both ends of the sliding bottom plate. At least two threaded holes are provided on the first limiting plate. The first limiting bolts pass through the first limiting grooves and are connected to the threaded holes of the limiting plates, for locking the position of the strut support frame on the support guide rail.

[0019] The second height adjusting mechanism is installed at the middle position on the sliding bottom plate for supporting the bottom end of the bracket of the landing gear, and the support height of the second height adjusting mechanism can be adjusted.

[0020] A further technical solution of the present invention is that: the second height adjustment mechanism includes a second support plate, a second positioning pin, and a second adjustment bolt; the second support plate is a T-shaped plate, including a second horizontal plate arranged horizontally and a second vertical plate vertically fixed on the first horizontal plate; the second horizontal plate is installed on the sliding bottom plate through a plurality of second positioning pins; the second vertical plate is perpendicular to the first vertical plate in space, and a second concave portion is provided at the center of the top of the second vertical plate for supporting the bottom end of the bracket of the landing gear; there are four second positioning pins, symmetrically arranged on both sides of the second vertical plate, and respectively inserted into through holes corresponding to the four corners of the second horizontal plate, playing a guiding role in adjusting the height of the second support plate, and the bottom end of the second positioning pin is fixedly connected to the sliding bottom plate by threads; there are two second adjustment bolts, respectively located in the middle of two second positioning pins on the same side, and the second adjustment bolts are threadedly connected to the second horizontal plate for adjusting the support height of the second support plate.

[0021] A further technical solution of the present invention is that: the second height adjustment mechanism further includes a second bearing chamber, and the two second bearing chambers correspond to the two second adjustment bolts one by one; the second bearing chamber includes a second bearing seat and a second bearing; the second bearing seat is fixed on the sliding bottom plate through mounting screws; the second bearing is installed in the second bearing seat, the second bearing is simultaneously located directly below the second adjustment bolt, and the inner ring of the second bearing is in interference fit connection with the lower end of the second adjustment bolt coaxially.

[0022] A further technical solution of the present invention is that: the wheel axle support frame includes a bracket slide plate, a second limiting plate, and a second slider; the bracket slide plate includes a slide plate and two third vertical plates, the slide plate is horizontally mounted on the support guide rail, and second sliders are provided at the bottom surfaces of both ends thereof and are respectively embedded in the inner grooves of the two track bodies and are in sliding contact with the rollers; the two third vertical plates are parallel to the second vertical plate and are both vertically fixed on the slide plate and are symmetric with respect to the center of the slide plate; a third concave portion is provided at the center of the top of the third vertical plate for supporting the wheel axle of the landing gear.

[0023] The two second limiting plates are fixedly mounted in parallel on the bottom surface of the slide plate and are respectively located inside the roller guide rails at both ends of the slide plate; at least two threaded holes are provided on the second limiting plate, and the second limiting bolts pass through the second limiting grooves of the track and are connected to the threaded holes of the second limiting plate for locking the position of the wheel axle support frame on the guide rail.

[0024] Beneficial effects

[0025] The beneficial effects of the present invention are as follows: For a screw jack type landing gear installation device of the present invention, a support guide rail composed of two mutually parallel roller guide rails is provided at the bottom, which is used to support and install the upper rocker support frame, the strut support frame and the axle support frame, facilitating the sliding adjustment of the positions of the strut support frame and the axle support frame along the support guide rail. Limit slots are provided on the guide rail, and limit plates are provided on the strut support frame and the axle support frame. The position can be locked by cooperating with limit bolts. The operation of adjusting and locking the positions of the strut support frame and the axle support is convenient. By adjusting the distance between the strut support frame and the axle support frame, the device can be applied to rocker type landing gears of different specifications and models, having versatility; at the same time, it is also convenient to move the landing gear to align and adjust the corresponding interfaces with the test bench.

[0026] A first height adjustment mechanism is provided in the upper rocker support frame, facilitating the adjustment of the height of the upper end of the rocker to be consistent with the corresponding interface of the test bench. A second height adjustment mechanism is provided in the strut support frame, facilitating the adjustment of the height of the installation hole at the upper end of the support to be consistent with the corresponding interface of the test bench. The two height adjustment mechanisms meet the lifting and adjustment requirements of the landing gear. By cooperating with the position adjustment of the strut support frame and the axle support frame along the support guide rail, the adjustment in two dimensions, namely the height direction of the landing gear support and the axial direction along the support guide rail, can be realized, facilitating the installation of the landing gear on the test bench.

[0027] In the strut support frame and the axle support frame of the present invention, the slider design facilitates the sliding adjustment of the support frame. While the limit plate design realizes position locking with the corresponding limit slot on the track, it can also cooperate with the slider to play a role in moving guidance, and at the same time prevent the strut support frame and the axle support frame from slipping out of the guide rail during sliding position adjustment. The first limit slot defines the adjustable position range of the strut support frame along the support guide rail, and the second limit slot defines the adjustable position range of the axle support frame along the support guide rail, meeting the limit and fixing requirements of the landing gear on the device. Brief Description of the Drawings

[0028] Figure 1 It is a schematic diagram of the overall structure of the landing gear installation device of the present invention;

[0029] Figure 2 It is a schematic diagram when the landing gear installation device of the present invention installs a rocker type landing gear;

[0030] Figure 3 It is a top view schematic diagram of the landing gear installation device of the present invention;

[0031] Figure 4 It is Figure 2 The enlarged view of the structure at A in

[0032] Figure 5 It is Figure 2 The enlarged view of the structure at B in

[0033] Figure 6Cross-sectional view of the installation structure of the bottom of the strut support frame and the support guide rail in the present invention;

[0034] Figure 7 Cross-sectional view of the installation structure of the wheel axle support frame and the support guide rail in the present invention.

[0035] Explanation of reference numerals: 1. Support guide rail, 11. Guide rail main body, 12. Roller, 13. First limiting groove, 14. Second limiting groove, 2. Upper rocker arm support frame, 21. Support seat, 211. Bottom plate, 212. Top plate, 213. Support rod, 22. First support plate, 221. First horizontal plate, 222. First vertical plate, 223. First concave part, 23. First positioning pin, 24. First adjusting bolt, 25. First bearing chamber, 251. First bearing seat, 252. First bearing, 3. Strut support frame, 31. Sliding bottom plate, 32. First limiting plate, 321. Threaded hole of the first limiting plate, 33. First slider, 34. First limiting bolt, 35. Second support plate, 351. Second horizontal plate, 352. Second vertical plate, 353. Second concave part, 36. Second positioning pin, 37. Second adjusting bolt, 38. Second bearing chamber, 381. Second bearing seat, 382. Second bearing, 4. Wheel axle support frame, 41. Bracket slide plate, 411. Slide plate, 412. Third vertical plate, 413. Third concave part, 42. Second limiting plate, 421. Threaded hole of the second limiting plate, 43. Second slider, 44. Second limiting bolt, 5. Landing gear, 51. Upper rocker arm, 511. Connecting hole at the end of the upper rocker arm, 52. Wheel axle, 53. Bracket, 531. Connecting hole at the upper end of the bracket, 54. Strut, 55. Lower rocker arm. Detailed implementation manners

[0036] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0038] This embodiment provides a screw jack type landing gear installation device, which is mainly applicable to the docking installation and disassembly of the landing gear on the test bench during the integrated system test of the rocker arm type landing gear with wheels as a whole. By placing the landing gear on this installation device and then placing the device with the landing gear on the test bench, manual adjustment of the main shaft direction and heading of the landing gear can be carried out, facilitating the installation and disassembly work of the rocker arm type landing gear. It ensures the stability of the assembled test piece with the landing gear and wheels during the installation process, and is easy to adjust, making the interface docking between the landing gear and the test bench more accurate.

[0039] Refer to Figures 1-3 , the screw jack type landing gear installation device described in this embodiment includes a support guide rail 1 and an upper rocker arm support frame 2, a strut support frame 3, and a wheel axle support frame 4 that are arranged side by side on the support guide rail 1.

[0040] The support guide rail 1 is located at the bottom of the device and serves as the support component of the entire device. It includes two horizontally arranged, parallel and aligned roller guide rails at both ends. Also refer to Figure 6 , 7 , the roller guide rail includes a guide rail body 11 and rollers 12. The guide rail body 11 is axially provided with an inner groove with a rectangular cross-section. A plurality of the rollers 12 are arranged in a row and rotatably installed in the inner groove to form the rolling elements of the roller guide rail. The bottom of the guide rail body 11 is vertically provided with a first limit groove 13 and a second limit groove 14 that penetrate the guide rail body 11, which are respectively used to define the installation positions of the strut support frame 3 and the wheel axle support frame 4. The first limit grooves 13 and the second limit grooves 14 of the two roller guide rails correspond to each other.

[0041] The upper rocker arm support frame 2 is fixed on the support guide rail 1 and is located at the leftmost end of the support guide rail 1 shown in Figure 1 , and is used to support the upper rocker arm 51 of the landing gear 5. The support height of the upper rocker arm support frame 2 can be adjusted. The upper rocker arm support frame 2 includes a support seat 21 and a first height adjustment mechanism. The bottom of the support seat 21 is fixed on the support guide rail 1, and a first height adjustment mechanism is installed on its top.

[0042] Specifically, the support seat 21 is a frame support structure, including a bottom plate 211, a top plate 212, and support rods 213. The bottom plate 211 is a square plate with a weight-reducing square hole in the center. The two ends of the bottom plate 211 are horizontally placed on the support guide rail 1 and fixedly connected to the guide rail. The top plate 212 is located directly above the center of the bottom plate 211 and is parallel to the bottom plate 211. The support rods 213 are rod-shaped and are used to fix the top plate 212 directly above the bottom plate 211. One end of each support rod 213 is fixedly connected to the bottom plate 211, and the other end is fixedly connected to the top plate 212. The four support rods 213 are respectively located at the four corresponding corner positions of the bottom plate 211 and the top plate 212.

[0043] Refer to Figure 1 , 4, the first height adjustment mechanism includes a first support plate 22, a first positioning pin 23, a first adjustment bolt 24, and a first bearing housing 25. The first support plate 22 is a T-shaped plate, including a horizontally arranged first horizontal plate 221 and a first vertical plate 222 vertically fixed at the middle position of the first horizontal plate 221. The first horizontal plate 221 is horizontally installed on the top plate 212 through four first positioning pins 23. The top center of the first vertical plate 222 is provided with a first concave portion 223 for supporting the upper rocker arm 51. The concave surface of the first concave portion 223 is an arc surface, and the axis of the arc surface of the first concave portion 223 is parallel to the axis direction of the roller guide rail. The four first positioning pins 23 are symmetrically arranged on both sides of the first vertical plate 222 and are located at the four corner positions of the first horizontal plate 221. The first positioning pin 23 is perpendicular to the top plate 212, and its lower end is provided with an external thread, which is threadedly fixed to the top plate 212 and locked by a locknut. The main body of the first positioning pin 23 is a smooth shaft, and its smooth shaft portion is inserted into the corresponding through hole of the first horizontal plate 221, and the two are in clearance fit to form a sliding pair, enabling the first horizontal plate 221 to slide up and down along the first positioning pin 23, thereby playing a guiding role in adjusting the height of the first support plate 22. There are two first adjustment bolts 24, which are parallel to the first positioning pin 23 and are respectively located in the middle of the two first positioning pins 23 on the same side. The first adjustment bolt 24 is threadedly connected to the first horizontal plate 221. By simultaneously and in the same direction screwing the two first adjustment bolts 24, the distance between the first horizontal plate 221 and the top plate 212 can be adjusted, and then the support height of the first support plate 22 can be adjusted.

[0044] To reduce the rotational friction force of the first adjustment bolt 24, first bearing housings 25 are provided directly below the two first adjustment bolts 24. The first bearing housing 25 includes a first bearing seat 251 and a first bearing 252. The first bearing seat 251 is fixed to the top plate 212 by mounting screws. The first bearing 252 is installed in the first bearing seat 251 and is coaxial with the first adjustment bolt 24. The outer ring of the first bearing 252 is in interference fit with the first bearing seat 251, and the inner ring of the first bearing 252 is in interference fit with the lower end of the first adjustment bolt 24. The lower end of the first adjustment bolt 24 is provided with a smooth shaft section that mates with the inner ring of the first bearing 252.

[0045] Refer to Figure 1 、 2 、6, the strut support frame 3 is shiftably installed on the support guide rail 1, between the upper rocker arm support frame 2 and the wheel axle support frame 4, where the wheel axle support frame 4 is located at Figure 1 the right end of the support guide rail 1 shown. The strut support frame 3 is used to support the bottom end of the bracket 53 of the landing gear 5. The installation position of the strut support frame 3 can be slidably adjusted and locked within the range defined by the two first limit grooves 13 of the support guide rail 1, and the support height of the strut support frame 3 can be adjusted.

[0046] Specifically, the strut support bracket 3 includes a sliding bottom plate 31, a first limit plate 32, a first slider 33, and a second height adjustment mechanism. The sliding bottom plate 31 is horizontally mounted on the support guide rail 1. First sliders 33 are provided at both bottom ends thereof and are respectively embedded in the inner grooves of the two track bodies 11. The lower end surface of the first slider 33 is in sliding contact with the roller 12.

[0047] There are two first limit plates 32, which are fixedly parallel to the bottom surface of the sliding bottom plate 31 and are respectively located inside the roller tracks at both ends of the sliding bottom plate 31. The outer side wall of the first limit plate 32 is in contact with the inner side wall of the track body 11. Two threaded holes 321 are provided on the first limit plate 32. The first limit bolt 34 passes through the first limit groove 13 and is threadedly connected to the threaded hole 321 of the first limit plate 32 to lock the position of the strut support bracket 3 on the support guide rail 1. The settings of the first limit plate 32 and the first slider 33 also improve the stability of the strut support bracket 3 when sliding along the support guide rail 1. It should be noted that the first limit plates 32, the first sliders 33, the threaded holes 321, the first limit bolts 34, and the first limit grooves 13 at both ends of the sliding bottom plate 31 are symmetrically arranged. When adjusting or locking the position of the strut support bracket 3 on the support guide rail 1, both ends need to be adjusted simultaneously.

[0048] Refer to Figure 1 、 2 As shown in FIGS. 4, 5, the second height adjustment mechanism is installed at the middle position on the sliding bottom plate 31 and is used to support the bottom end of the bracket 53 of the landing gear 5, that is, the connection point of the three components of the bracket 53, the strut 54, and the lower rocker arm 55 of the landing gear 5. The support height of the second height adjustment mechanism can be adjusted.

[0049] The second height adjustment mechanism includes a second support plate 35, a second positioning pin 36, a second adjusting bolt 37, and a second bearing housing 38. The second support plate 35 is a T-shaped plate structure, including a horizontally arranged second horizontal plate 351 and a second vertical plate 352 vertically fixed at the middle position of the first horizontal plate. The second horizontal plate 351 is horizontally installed above the sliding bottom plate 31 through four second positioning pins 36. The second vertical plate 352 is spatially perpendicular to the first vertical plate 222. At the center of the top of the second vertical plate 352, there is a second concave portion 353 for supporting the bottom end of the bracket 53 of the landing gear 5. The concave surface of the second concave portion 353 is an arc surface, and the axis of the arc surface of the second concave portion 353 is spatially perpendicular to the axis direction of the roller guide rail. There are four second positioning pins 36, symmetrically arranged on both sides of the second vertical plate 352, and located at the four corner positions of the second horizontal plate 351. The second positioning pin 36 is perpendicular to the sliding bottom plate 31, and its lower end is provided with an external thread, which is threadedly fixed to the sliding bottom plate 31 and locked by a locknut. The main body of the second positioning pin 36 is a smooth shaft, and its smooth shaft portion is inserted into the corresponding through hole of the second horizontal plate 351, and the two are in clearance fit to form a sliding pair, enabling the second horizontal plate 351 to slide up and down along the second positioning pin 36, thus playing a guiding role in adjusting the height of the second support plate 35. There are two second adjusting bolts 37, parallel to the second positioning pins 36, and respectively located in the middle of the two second positioning pins 36 on the same side. The second adjusting bolts 37 are threadedly connected to the second horizontal plate 351. By simultaneously and in the same direction screwing the two second adjusting bolts 37, the distance between the second horizontal plate 351 and the sliding bottom plate 31 can be adjusted, and further the support height of the second support plate 35 can be adjusted. Figure 5 The state when the distance between the second support plate 35 and the sliding bottom plate 31 is the largest is shown.

[0050] It can be seen that the component structures and connection methods of the second height adjustment mechanism and the first height adjustment mechanism are the same, and the overall installation directions are perpendicular to each other.

[0051] In order to reduce the rotational friction force of the second adjusting bolt 37, second bearing housings 38 are provided directly below the two second adjusting bolts 37. The second bearing housing 38 includes a second bearing seat 381 and a second bearing 382. The second bearing seat 381 is fixed to the sliding bottom plate 31 by mounting screws. The second bearing 382 is installed in the second bearing seat 381 and is coaxial with the second adjusting bolt 37. The outer ring of the second bearing 382 is connected to the second bearing seat 381 by interference fit, and the inner ring of the second bearing 382 is connected to the lower end of the second adjusting bolt 37 by interference fit. The lower end of the second adjusting bolt 37 is provided with a smooth shaft section that fits with the inner ring of the second bearing 382.

[0052] Refer to Figure 1 、 2 、7, the wheel axle support frame 4 can be shiftably installed on the support guide rail 1 and is located Figure 1The right end of the support guide rail 1 shown is used to horizontally support the axle 52 of the landing gear 5. The installation position of the axle support frame 4 can be slidably adjusted and locked within the range defined by the second limit groove 14 along the support guide rail 1.

[0053] The axle support frame 4 includes a bracket slide plate 41, a second limit plate 42, and a second slider 43. The bracket slide plate 41 includes a slide plate 411 and two third vertical plates 412. The slide plate 411 is horizontally mounted on the support guide rail 1, and second sliders 43 are provided on the bottom surfaces of both ends thereof and are respectively embedded in the inner grooves of the two guide rail bodies 11. The lower end surface of the second slider 43 is in sliding contact with the roller 12. The two third vertical plates 412 are parallel to the second vertical plate 352 and parallel to the support guide rail 1; the two third vertical plates 412 are both vertically fixed on the slide plate 411 and are centrosymmetric with respect to the slide plate 411. A third concave portion 413 is provided at the center of the top of the third vertical plate 412 for supporting the axle 52 of the landing gear 5. The concave surface of the third concave portion 413 is an arc surface, and the axis of the arc surface of the third concave portion 413 is spatially perpendicular to the axis direction of the roller guide rail. The design of the arc-shaped third concave portion 413 enables the axle 52 to be in full contact with the third vertical plate 412, ensuring the support stability.

[0054] There are two second limit plates 42, which are fixedly parallel to the bottom surface of the slide plate 411 and are respectively located inside the roller guide rails at both ends of the slide plate 411. The outer side wall of the second limit plate 42 is in contact with the inner side wall of the track body 11. Two threaded holes 421 are provided on the second limit plate 42, and the second limit bolt 44 passes through the second limit groove 14 of the guide rail body 11 and is threadedly connected to the threaded hole 421 of the second limit plate 44 to realize the position locking of the axle support frame 4 on the support guide rail 1. The setting of the second limit plate 42 and the second slider 43 improves the stability of the axle support frame 4 when sliding along the support guide rail 1. It should also be noted that the second limit plates 42, the second sliders 43, the threaded holes 421, the second limit bolts 44, and the second limit grooves 14 at both ends of the bracket slide plate 41 are all symmetrically arranged. When adjusting or locking the position of the axle support frame 4 on the support guide rail 1, both ends need to be carried out simultaneously.

[0055] When the screw jack type landing gear installation device is in use, adjust the positions of the strut support frame 3 and the axle support frame 4 on the support guide rail 1 so that the distances between the upper rocker arm support frame 2, the strut support frame 3, and the axle support frame 4 match the landing gear 5 to be tested; adjust the support heights of the first height adjustment mechanism and the second height adjustment mechanism so that the support height of the device matches the landing gear 5 to be tested. Place the rocker arm type aircraft landing gear 5 with wheels on this device, so that the first concave portion 223 of the first support plate 22 in the upper rocker arm support frame 2 supports the outer diameter of the upper rocker arm 51 of the landing gear 5; make the second concave portion 353 of the second support plate 35 in the strut support frame 3 support the bottom end of the bracket 53 of the landing gear 5; make the third concave portions 413 of the two third vertical plates 412 in the axle support frame 4 support the outer diameter of the axle 52 of the landing gear 5. Then move the installation device with the landing gear 5 placed on it to the system test bench by a flatbed truck or a vehicle to complete the subsequent installation. By simultaneously screwing the two first adjustment bolts 24 in the upper rocker arm support frame 2, the distance between the first horizontal plate 221 and the top plate 212 can be adjusted, and then the support height of the first support plate 22 can be adjusted to facilitate the adjustment of the height of the connection hole 511 at the end of the upper rocker arm to be consistent with the corresponding interface on the test bench. By simultaneously screwing the two second adjustment bolts 37 in the strut support frame 3, the distance between the second horizontal plate 351 and the sliding bottom plate 31 can be adjusted, and then the support height of the second support plate 35 can be adjusted to facilitate the adjustment of the height of the connection hole 531 at the upper end of the bracket to be consistent with the corresponding interface on the test bench. By adjusting the installation positions of the strut support frame 3 along the support guide rail 1 and the installation positions of the axle support frame 4 along the support guide rail 1, the axial position adjustment of the landing gear 5 along the support guide rail 1 can be achieved, that is, the manual adjustment of the heading of the landing gear 5. After adjustment in place, fix the connection hole 511 at the end of the upper rocker arm to the top of the test bench frame through a fastening bolt, and fixedly connect the connection hole 531 at the upper end of the bracket through a bench frame connecting shaft and a locking device. After the installation is completed, remove this installation device for testing. During disassembly, first support the device under the landing gear 5, and then disassemble each connection interface.

[0056] A screw jack type landing gear installation device provided in this embodiment is used to install the test piece for the integrated test of the landing gear with wheels onto the landing gear system integrated test bench, and can perform manual adjustment of the main shaft direction and heading of the landing gear, and is applicable to the installation and disassembly work of rocker arm type landing gears. By adjusting the positional relationship between the strut support frame 3 and the axle support frame 4 on the support guide rail 1, and by adjusting the first height adjustment mechanism and the second height adjustment mechanism, the landing gear 5 is made to match the installation device for stable support; the landing gear 5 is made to match the corresponding installation interfaces on the test bench frame for precise docking adjustment. Thereby reducing the labor intensity of workers, improving the stability during the installation process of the landing gear 5, and making the interface docking between the landing gear 5 and the test bench more precise.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A screw jack type landing gear installation device, characterized in that: It includes a support guide rail, an upper rocker support frame, a strut support frame, and a wheel axle support frame; The support guide rail is located at the bottom of the device and is used for installing other components; The upper rocker support frame is fixed on the support guide rail and is located at one end of the support guide rail, and is used for supporting the upper rocker of the landing gear; the support height of the upper rocker support frame is adjustable; The wheel axle support frame is shiftably installed on the support guide rail and is located at the other end of the support guide rail, and is used for horizontally supporting the wheel axle of the landing gear; the installation position of the wheel axle support frame can be slidably adjusted and locked in position along the support guide rail; The strut support frame is shiftably installed on the support guide rail and is located between the upper rocker support frame and the wheel axle support frame, and is used for supporting the bottom end of the strut of the landing gear; the installation position of the strut support frame can be slidably adjusted and locked in position along the support guide rail, and the support height of the strut support frame is adjustable.

2. The screw jack type landing gear mounting device according to claim 1, wherein: The support guide rail includes two roller guide rails that are parallel to each other and aligned at both ends; the roller guide rail includes a guide rail body and rollers; a rectangular inner groove is axially provided on the guide rail body, and a plurality of the rollers are rotatably installed in the inner groove in a linear arrangement to form the rolling elements of the guide rail; a first limit groove and a second limit groove are provided at the bottom of the guide rail body, which are respectively used to define the installation positions of the strut support frame and the wheel axle support frame.

3. The screw jack type landing gear installation device according to claim 2, characterized in that: The upper rocker support frame includes a support seat and a first height adjustment mechanism. The bottom of the support seat is fixed on the support guide rail, and a first height adjustment mechanism is installed on its top; The first height adjustment mechanism includes: a first support plate, a first positioning pin, and a first adjustment bolt; The first support plate is vertically slidably installed on the top of the support seat through a plurality of first positioning pins. An inner concave portion for supporting the upper rocker is provided at the top end of the first support plate; the first adjustment bolt is threadedly connected to the first support plate and is used to adjust the support height of the first support plate.

4. The screw jack type landing gear installation device according to claim 3, characterized in that: The support seat is of a frame structure and includes a bottom plate, a top plate, and support rods. The bottom plate is fixedly connected to the support guide rail; the top plate is located directly above the center of the bottom plate and is parallel to the bottom plate; the four support rods are used to fixedly connect the four corner positions of the bottom plate and the top plate.

5. The screw jack type landing gear installation device according to claim 3, characterized in that: The first support plate is a T-shaped plate and includes a first horizontal plate arranged horizontally and a first vertical plate vertically fixed on the first horizontal plate. A first inner concave portion is provided at the center of the top of the first vertical plate for supporting the upper rocker; there are four first positioning pins, symmetrically arranged on both sides of the first vertical plate, and respectively inserted into through holes corresponding to the four corner positions of the first horizontal plate to play a guiding role in adjusting the height of the first support plate. The bottom end of the first positioning pin is threadedly fixed to the top plate; there are two first adjustment bolts, respectively located between the two first positioning pins on the same side, and the first adjustment bolt is threadedly connected to the first horizontal plate.

6. The screw jack type landing gear mounting device according to claim 3, characterized in that: The first height adjustment mechanism further includes a first bearing chamber. The two first bearing chambers correspond to the two first adjustment bolts one by one; the first bearing chamber includes a first bearing seat and a first bearing; the first bearing seat is fixed on the top plate through mounting screws; the first bearing is installed in the bearing seat and is located directly below the first adjustment bolt. The inner ring of the first bearing is in interference fit connection with the lower end of the first adjustment bolt coaxially.

7. The screw jack type landing gear mounting device according to claim 2, wherein: The pillar support frame includes a sliding bottom plate, a first limit plate, a first slider, and a second height adjustment mechanism; The sliding bottom plate is horizontally mounted on the support guide rail. First sliders are provided at the bottom surfaces of both ends thereof and are respectively embedded in the inner grooves of the two track bodies and are in sliding contact with the rollers; The two first limit plates are fixedly parallel to the bottom surface of the sliding bottom plate and are respectively located inside the roller tracks at both ends of the sliding bottom plate; at least two threaded holes are provided on the first limit plate, and the first limit bolt passes through the first limit groove and is connected to the threaded hole of the first limit plate for locking the position of the pillar support frame on the support guide rail; The second height adjustment mechanism is installed at the middle position on the sliding bottom plate and is used to support the bottom end of the bracket of the landing gear, and the support height of the second height adjustment mechanism can be adjusted.

8. The screw jack type landing gear installation device according to claim 7, characterized in that: The second height adjustment mechanism includes a second support plate, a second positioning pin, and a second adjustment bolt; the second support plate is a T-shaped plate and includes a second horizontal plate arranged horizontally and a second vertical plate vertically fixed on the first horizontal plate; the second horizontal plate is installed on the sliding bottom plate through the second positioning pin; the second vertical plate is perpendicular to the first vertical plate in space, and a second concave portion is provided at the center of the top of the second vertical plate for supporting the bottom end of the bracket of the landing gear; four second positioning pins are provided, symmetrically arranged on both sides of the second vertical plate, and respectively penetrate through the through holes corresponding to the four corners of the second horizontal plate to play a guiding role in adjusting the height of the second support plate, and the bottom end of the second positioning pin is fixedly connected to the sliding bottom plate by threads; two second adjustment bolts are provided, respectively located between the two second positioning pins on the same side, and the second adjustment bolts are threadedly connected to the second horizontal plate for adjusting the support height of the second support plate.

9. The screw jack type landing gear installation device according to claim 8, characterized in that: The second height adjustment mechanism further includes a second bearing chamber, and the two second bearing chambers correspond to the two second adjustment bolts one by one; the second bearing chamber includes a second bearing seat and a second bearing; the second bearing seat is fixed to the sliding bottom plate by mounting screws; the second bearing is installed in the second bearing seat and is located directly below the second adjustment bolt, and the inner ring of the second bearing is in interference fit connection with the lower end of the second adjustment bolt coaxially.

10. The screw jack type landing gear mounting device according to claim 2, characterized in that: The wheel axle support frame includes a bracket sliding plate, a second limit plate, and a second slider; the bracket sliding plate includes a sliding plate and two third vertical plates, the sliding plate is horizontally mounted on the support guide rail, and second sliders are provided at the bottom surfaces of both ends thereof and are respectively embedded in the inner grooves of the two guide rail bodies and are in sliding contact with the rollers; the two third vertical plates are parallel to the second vertical plate and are both vertically fixed on the sliding plate and are symmetric with respect to the center of the sliding plate; a third concave portion is provided at the center of the top of the third vertical plate for supporting the wheel axle of the landing gear; The two second limit plates are fixedly parallel to the bottom surface of the sliding plate and are respectively located inside the roller guide rails at both ends of the sliding plate; at least two threaded holes are provided on the second limit plate, and the second limit bolt passes through the second limit groove of the guide rail body and is connected to the threaded hole of the second limit plate for locking the position of the wheel axle support frame on the support guide rail.

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