Frame type undercarriage with adjustable structure for test

Abstract

The invention discloses a frame type undercarriage with an adjustable structure for a test. The frame type undercarriage aims at solving the problem that an existing fixed undercarriage is insufficient in flexibility under variable test conditions. The undercarriage comprises a bearing module, a frame module and a buffer module. The bearing module comprises a plurality of bearing units, and each bearing unit comprises an axle, two wheels, a bearing, two axle sleeves and two limiting hoops. The frame module is used for adjusting the main, starting and retreating distance and the tire distance. The buffer module comprises an oil gas buffer, an anti-torsion arm and a buffer base. Through the adjustable frame structure, different test requirements are met, the test cost is reduced, the research and development period is shortened, the performance and safety of the aircraft in diversified environments are improved, and the aircraft has remarkable practical value and wide application prospects.

Description

Technical Field

[0001] The invention relates to the field of landing gear test applications, and in particular to a test-use adjustable frame-type landing gear. Background Art

[0002] In landing gear testing, the existing fixed landing gear prototype design has certain limitations. Once the fixed landing gear is manufactured, its size and shape cannot be changed. Although this design is relatively simple in manufacturing process, it lacks flexibility when facing changing test conditions. Especially when conducting ground tests or simulating different load conditions, the structure of the landing gear needs to be adjusted to meet different test requirements. Fixed landing gear cannot meet this demand for flexible adjustment, so it is often necessary to manufacture multiple sets of landing gear with different configurations during the test process, which not only increases costs but also prolongs the R&D cycle.

[0003] In order to solve the above problems, the present invention provides an adjustable test frame landing gear. By designing an adjustable frame structure, the main take-off and setback distance of the frame landing gear and the distance between the left and right tires can be flexibly adjusted according to different test requirements and actual application environments, thereby improving the adaptability and functionality of the landing gear test piece. Compared with the prior art, the present invention can meet different load conditions and diversified test requirements without replacing multiple sets of frame landing gears, thereby effectively reducing test costs, shortening the R&D cycle, and improving test efficiency. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an adjustable frame-type landing gear for testing in view of the defects involved in the background technology.

[0005] The present invention adopts the following technical solutions to solve the above technical problems: An adjustable configuration frame type landing gear for testing, comprising a load-bearing module, a frame module and a buffer module; The load-bearing module includes first to third load-bearing units; The first to third load-bearing units have the same structure, and all include a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; a limiting threaded blind hole for fixing the wheel axle is provided at the midpoint of the mounting ring; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The frame module comprises a first fixing beam, a connecting block, a second fixing beam, first to fourth engaging blocks, and first to seventh fixing bolts; The first fixed beam and the second fixed beam have the same structure, and one end of each is provided with a threaded column, and the side wall is evenly provided with a first through groove and a second through groove along the length direction; the first through groove and the second through groove have the same structure, and both include a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected end to end in sequence, wherein the first arc-shaped groove wall and the second arc-shaped groove wall are both side walls of a semi-cylinder, and the opening directions are opposite; the first plane groove wall is provided with a first fixing through hole and a second fixing through hole respectively; The first to fourth engaging blocks have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The first engaging block and the mounting ring of the wheel axle can cooperate with the first through groove gap; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the first arc-shaped groove wall of the first through groove and the mounting ring of the wheel axle with corresponding gaps, the engaging threaded blind hole on the first engaging block and the first fixed through hole on the first through groove are connected and coaxial, and the limiting threaded blind hole on the wheel axle and the second fixed through hole on the first through groove are connected and coaxial; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the mounting ring of the wheel axle and the first arc-shaped groove wall of the first through groove with corresponding gaps, the engaging threaded blind hole on the first engaging block and the second fixed through hole on the first through groove are connected and coaxial, the limiting threaded blind hole on the wheel axle and the first fixed through hole on the first through groove are connected and coaxial; The connecting block is a rectangular parallelepiped, comprising a first side wall, a second side wall, and first to fourth side walls connected end to end in sequence, wherein the first side wall and the second side wall are respectively provided with threaded blind holes in the center thereof for matching with the threaded columns on the first fixing beam and the second fixing beam; the first side wall and the third side wall are horizontal; the second side wall is provided with a through hole for matching with the clearance of the wheel axle mounting ring, and the axis of the through hole intersects perpendicularly with the axis of the threaded blind hole on the first side wall; the first side wall is provided with a third fixing through hole in the center thereof for matching with the fifth fixing bolt; The threaded columns of the first fixing beam and the second fixing beam are respectively threadedly fixed to the threaded blind holes on the first side wall and the second side wall of the connecting block, so that the axes of the first through grooves of the first fixing beam and the second fixing beam are parallel to the axis of the through hole on the second side wall of the connecting block; The first engaging block and the mounting ring of the axle of the first load-bearing unit are arranged in the first through groove of the first fixed beam, and the second engaging block and the mounting ring of the axle of the second load-bearing unit are arranged in the first through groove of the second fixed beam; When the first fixing bolt passes through the first fixing through hole on the first through slot of the first fixing beam and the locking thread blind hole on the first locking block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the first through slot of the first fixing beam and the limiting thread blind hole on the axle of the first load-bearing unit and is threadedly fixed, the third fixing bolt passes through the first fixing through hole on the first through slot of the second fixing beam and the locking thread blind hole on the second locking block and is threadedly fixed, and the fourth fixing bolt passes through the second fixing through hole on the first through slot of the second fixing beam and the limiting thread blind hole on the axle of the second load-bearing unit and is threadedly fixed; When the first fixing bolt passes through the second fixing through hole on the first through slot of the first fixing beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixed, and the second fixing bolt passes through the first fixing through hole on the first through slot of the first fixing beam and the engaging threaded blind hole on the first engaging block and is threadedly fixed, the third fixing bolt passes through the second fixing through hole on the first through slot of the second fixing beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixed, and the fourth fixing bolt passes through the first fixing through hole on the first through slot of the second fixing beam and is threadedly fixed with the engaging threaded blind hole on the second engaging block; The fifth fixing bolt passes through the third fixing through hole on the connecting block and is threadedly fixed to the limiting threaded blind hole on the axle of the third load-bearing unit; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a third through groove with the same shape as the first through groove, and the third through groove also comprises a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected in sequence end to end, wherein the second plane groove wall is provided with a fourth fixing through hole; The first side plate and the second side plate include the connecting block, the third through slot on the first side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the third engaging block, and the third through slot on the second side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the fourth engaging block; When the first arc wall and the second arc wall of the third engaging block are respectively matched with the first arc-shaped groove wall of the third through groove of the first side plate and the corresponding clearance of the mounting ring of the third load-bearing unit wheel axle, the first arc wall and the second arc wall of the fourth engaging block are respectively matched with the first arc-shaped groove wall of the third through groove of the second side plate and the corresponding clearance of the mounting ring of the third load-bearing unit wheel axle, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; When the first arc wall and the second arc wall of the third engaging block respectively cooperate with the corresponding clearances of the mounting ring of the third load-bearing unit axle and the first arc-shaped groove wall of the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively cooperate with the corresponding clearances of the mounting ring of the third load-bearing unit axle and the first arc-shaped groove wall of the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0006] The present invention also discloses another test adjustable frame type landing gear, comprising a load-bearing module, a frame module and a buffer module; The load-bearing module includes first and second load-bearing units; The first to second load-bearing units have the same structure, and both include a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; a limiting threaded blind hole for fixing the wheel axle is provided at the midpoint of the mounting ring; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The frame module comprises a first fixing beam, a connecting block, a second fixing beam, first to fourth engaging blocks, a fixing shaft, and first to seventh fixing bolts; The first fixed beam and the second fixed beam have the same structure, and one end of each is provided with a threaded column, and the side wall is evenly provided with a first through groove and a second through groove along the length direction; the first through groove and the second through groove have the same structure, and both include a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected end to end in sequence, wherein the first arc-shaped groove wall and the second arc-shaped groove wall are both side walls of a semi-cylinder, and the opening directions are opposite; the first plane groove wall is provided with a first fixing through hole and a second fixing through hole respectively; The first to fourth engaging blocks have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The first engaging block and the mounting ring of the wheel axle can cooperate with the first through groove gap; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the first arc-shaped groove wall of the first through groove and the mounting ring of the wheel axle with corresponding gaps, the engaging threaded blind hole on the first engaging block and the first fixed through hole on the first through groove are connected and coaxial, and the limiting threaded blind hole on the wheel axle and the second fixed through hole on the first through groove are connected and coaxial; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the mounting ring of the wheel axle and the first arc-shaped groove wall of the first through groove with corresponding gaps, the engaging threaded blind hole on the first engaging block and the second fixed through hole on the first through groove are connected and coaxial, the limiting threaded blind hole on the wheel axle and the first fixed through hole on the first through groove are connected and coaxial; The connecting block is a rectangular parallelepiped, comprising a first side wall, a second side wall, and first to fourth side walls connected end to end in sequence, wherein the first side wall and the second side wall are respectively provided with threaded blind holes in the center thereof for matching with the threaded columns on the first fixing beam and the second fixing beam; the first side wall and the third side wall are horizontal; the second side wall is provided with a through hole for matching with the clearance of the wheel axle mounting ring, and the axis of the through hole intersects perpendicularly with the axis of the threaded blind hole on the first side wall; the first side wall is provided with a third fixing through hole in the center thereof for matching with the fifth fixing bolt; The threaded columns of the first fixing beam and the second fixing beam are respectively threadedly fixed to the threaded blind holes on the first side wall and the second side wall of the connecting block, so that the axes of the first through grooves of the first fixing beam and the second fixing beam are parallel to the axis of the through hole on the second side wall of the connecting block; When the first clamping block and the mounting ring of the wheel axle of the first load-bearing unit are arranged in the first through groove of the first fixing beam, the second clamping block and the mounting ring of the wheel axle of the second load-bearing unit are arranged in the first through groove of the second fixing beam; at this time, if the first fixing bolt passes through the first fixing through hole on the first through groove of the first fixing beam and the clamping threaded blind hole on the first clamping block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the first through groove of the first fixing beam and the limiting threaded blind hole on the wheel axle of the first load-bearing unit and is threadedly fixed, then the third fixing bolt passes through the first fixing through hole on the first through groove of the second fixing beam and is threadedly fixed with the clamping threaded blind hole on the second clamping block, and the fourth fixing bolt passes through the second fixing The second fixing through hole on the first through slot of the fixed beam is threadedly fixedly connected with the limiting threaded blind hole on the axle of the second load-bearing unit; if the first fixing bolt passes through the second fixing through hole on the first through slot of the first fixed beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixedly connected, and the second fixing bolt passes through the first fixing through hole on the first through slot of the first fixed beam and the engaging threaded blind hole on the first engaging block and is threadedly fixedly connected, the third fixing bolt passes through the second fixing through hole on the first through slot of the second fixed beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixedly connected, and the fourth fixing bolt passes through the first fixing through hole on the first through slot of the second fixed beam and is threadedly fixedly connected with the engaging threaded blind hole on the second engaging block; When the first clamping block and the mounting ring of the wheel axle of the first load-bearing unit are arranged in the second through groove of the first fixing beam, the second clamping block and the mounting ring of the wheel axle of the second load-bearing unit are arranged in the second through groove of the second fixing beam; at this time, if the first fixing bolt passes through the first fixing through hole on the second through groove of the first fixing beam and the clamping threaded blind hole on the first clamping block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the second through groove of the first fixing beam and the limiting threaded blind hole on the wheel axle of the first load-bearing unit and is threadedly fixed, then the third fixing bolt passes through the first fixing through hole on the second through groove of the second fixing beam and is threadedly fixed with the clamping threaded blind hole on the second clamping block, and the fourth fixing bolt passes through the second fixing The second fixing through hole on the second through slot of the fixed beam is threadedly fixedly connected with the limiting threaded blind hole on the axle of the second load-bearing unit; if the first fixing bolt passes through the second fixing through hole on the second through slot of the first fixed beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixedly connected, and the second fixing bolt passes through the first fixing through hole on the second through slot of the first fixed beam and the engaging threaded blind hole on the first engaging block and is threadedly fixedly connected, the third fixing bolt passes through the second fixing through hole on the second through slot of the second fixed beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixedly connected, and the fourth fixing bolt passes through the first fixing through hole on the second through slot of the second fixed beam and is threadedly fixedly connected with the engaging threaded blind hole on the second engaging block; The fixed shaft is a cylinder having the same shape as the mounting ring of the wheel axle, and a limiting threaded blind hole is provided at its midpoint; The fifth fixing bolt passes through the third fixing through hole on the connecting block and is threadedly fixed to the limiting threaded blind hole on the fixing shaft; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a third through groove with the same shape as the first through groove, and the third through groove also comprises a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected in sequence end to end, wherein the second plane groove wall is provided with a fourth fixing through hole; The first side plate and the second side plate include the connecting block, the third through slot on the first side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the third engaging block, and the third through slot on the second side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the fourth engaging block; When the first arc wall and the second arc wall of the third engaging block respectively cooperate with the first arc groove wall and the corresponding clearance of the fixed shaft of the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively cooperate with the first arc groove wall and the corresponding clearance of the fixed shaft of the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; When the first arc wall and the second arc wall of the third engaging block respectively match with the corresponding clearances of the first arc-shaped groove wall of the fixed shaft and the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively match with the corresponding clearances of the first arc-shaped groove wall of the fixed shaft and the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0007] The present invention also discloses another test adjustable frame type landing gear, comprising a load-bearing unit, a first engaging block, a second engaging block, a buffer module, and first to fourth fixing bolts; The load-bearing unit comprises a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; two ends of the mounting ring are respectively provided with a first limiting threaded blind hole and a second limiting threaded blind hole for fixing the wheel axle; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The first engaging block and the second engaging block have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the thickness is the same as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a first fixed through groove and a second fixed through groove, the first fixed through groove and the second fixed through groove have the same structure and both comprise a first arcuate groove wall, a first plane groove wall, a second arcuate groove wall and a second plane groove wall which are connected end to end in sequence, wherein the first arcuate groove wall and the second arcuate groove wall are both side walls of a semi-cylinder with opposite opening directions; the second plane groove wall is provided with a first fixed through hole and a second fixed through hole; The first engaging block and the mounting ring of the wheel shaft can be loosely matched with the first fixed through groove, and the second engaging block and the mounting ring of the wheel shaft can be loosely matched with the second fixed through groove; When the first arc wall and the second arc wall of the first engaging block respectively cooperate with the corresponding clearances of the first arc groove wall of the first fixed through groove and the mounting ring of the wheel axle, the first arc wall and the second arc wall of the second engaging block respectively cooperate with the corresponding clearances of the first arc groove wall of the second fixed through groove and the mounting ring of the wheel axle, the first fixing bolt passes through the first fixing through hole on the first fixing through groove and is threadedly connected with the engaging threaded blind hole on the first engaging block, the second fixing bolt passes through the second fixing through hole on the first fixing through groove and is threadedly connected with the first limiting threaded blind hole on the wheel axle; the third fixing bolt passes through the first fixing through hole on the second fixing through groove and is threadedly connected with the engaging threaded blind hole on the second engaging block, and the fourth fixing bolt passes through the second fixing through hole on the second fixing through groove and is threadedly connected with the second limiting threaded blind hole on the wheel axle; When the first arc wall and the second arc wall of the first engaging block respectively cooperate with the corresponding clearances of the mounting ring of the wheel axle and the first arc groove wall of the first fixed through groove, the first arc wall and the second arc groove wall of the second engaging block respectively cooperate with the corresponding clearances of the mounting ring of the wheel axle and the first arc groove wall of the second fixed through groove, the first fixing bolt passes through the first fixing through hole on the first fixing through groove and is threadedly connected with the first limiting thread blind hole on the wheel axle, the second fixing bolt passes through the second fixing through hole on the first fixing through groove and is threadedly connected with the engaging thread blind hole on the first engaging block; the third fixing bolt passes through the first fixing through hole on the second fixing through groove and is threadedly connected with the second limiting thread blind hole on the wheel axle, the fourth fixing bolt passes through the second fixing through hole on the second fixing through groove and is threadedly connected with the engaging thread blind hole on the second engaging block; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0008] The present invention also discloses another test adjustable frame type landing gear, comprising a load-bearing unit, a first adjustment block, a second adjustment block, a buffer module, and first to second fixing bolts; The load-bearing unit comprises a wheel axle, a wheel and a bearing; the inner ring of the bearing is sleeved at the midpoint of the wheel axle and is coaxially fixedly connected to the wheel axle; the wheel hub of the wheel is coaxially fixedly connected to the outer ring of the bearing; The first adjustment block and the second adjustment block have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder with opposite opening directions; the first flat wall and the second flat wall are respectively provided with a first adjustment threaded blind hole and a second adjustment threaded blind hole, and the first end wall is provided with a mounting through hole; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a first fixed through groove and a second fixed through groove, the first fixed through groove, the second fixed through groove and the first adjustment block have the same shape, and all comprise a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall and a second plane groove wall connected end to end in sequence, and a fixing through hole is provided on the second plane groove wall; The first adjustment block can be matched with the first fixed through slot with a clearance, and the second adjustment block can be matched with the second fixed through slot with a clearance; When the first arc wall of the first adjusting block and the first arc groove wall gap of the first fixed through groove are matched, the first arc wall of the second adjusting block and the first arc groove wall gap of the second fixed through groove are matched, the first fixing bolt passes through the fixing through hole on the first fixed through groove and is threadedly fixedly connected with the first adjusting thread blind hole on the first adjusting block, and the second fixing bolt passes through the fixing through hole on the second fixed through groove and is threadedly fixedly connected with the first adjusting thread blind hole on the second adjusting block; When the first arc wall of the first adjusting block and the second arc groove wall gap of the first fixed through groove are matched, the first arc wall of the second adjusting block and the second arc groove wall gap of the second fixed through groove are matched, the first fixing bolt passes through the fixing through hole on the first fixed through groove and is threadedly fixedly connected with the second adjusting thread blind hole on the first adjusting block, and the second fixing bolt passes through the fixing through hole on the second fixed through groove and is threadedly fixedly connected with the second adjusting thread blind hole on the second adjusting block; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0009] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: Compared with the traditional fixed landing gear, the adjustable frame landing gear of the present invention reduces the need to manufacture multiple sets of frame landing gear, thereby reducing costs and shortening the development cycle. The present invention also includes a method for testing and verifying the adjustable frame landing gear, which verifies the capacity, stability and durability of the landing gear by simulating different configurations and loads to ensure its reliability in actual applications. By accurately adjusting the tire spacing and setback distance of the frame landing gear, the landing gear design of the present invention can adapt to changing use environments, such as different runway conditions and terrains, and improve the performance of the aircraft in a variety of environments.

[0010] In summary, the adjustable test-use frame-type landing gear of the present invention not only improves the adaptability and functionality of the frame-type landing gear through its unique design and adjustment mechanism, but also reduces costs, shortens the R&D cycle, and improves the performance and safety of aircraft in different environments. The embodiments and drawings of the present invention further describe in detail the various components of the above-mentioned technical solution and their interrelationships, as well as how to achieve the technical objectives of the present invention. The realization of these technical effects provides a solid foundation for the application of the present invention in the field of aircraft landing gear design and manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the first configuration of the present invention; Figure 2 It is a schematic diagram of the exploded structure of the first load-bearing unit of the present invention after the first and second wheels are removed; Figure 3 It is a structural schematic diagram of the first fixed beam in the present invention; Figure 4 It is a structural schematic diagram of the connection block in the present invention; Figure 5 It is a schematic structural diagram of the vehicle frame of the present invention and the first to third load-bearing units cooperating with each other; Figure 6 It is a structural schematic diagram of the buffer base in the present invention; Figure 7 It is a schematic diagram of the structure of the buffer base and the frame module in the present invention; Figure 8 It is a schematic diagram of the structure of the buffer module and the frame module in the present invention; Fig. 9 It is a structural schematic diagram of the second configuration of the present invention; Fig.10 is a schematic diagram of the structure after the second configuration of the present invention is adjusted; Fig.11 It is a structural schematic diagram of the third configuration of the present invention; Fig.12is a schematic diagram of the structure of the third configuration of the present invention after the wheels are removed; Fig.13 It is a structural schematic diagram of the fourth configuration of the present invention.

[0012] In the figure, 1-outer cylinder, 2-upper anti-torsion arm, 3-lower anti-torsion arm, 4-wheel, 5-first fixed beam, 6-buffer base, 7-second fixed beam, 8-axle limiting clamp, 9-frame connecting block, 10-axle sleeve, 11-axle, 12-frame blocking block, 13-frame blocking block. DETAILED DESCRIPTION

[0013] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings: The present invention can be implemented in many different forms and should not be considered to be limited to the embodiments described herein. On the contrary, these embodiments are provided to make this disclosure thorough and complete, and will fully express the scope of the present invention to those skilled in the art. In the accompanying drawings, components are enlarged for clarity.

[0014] like Figure 1 As shown, the present invention discloses an adjustable configuration frame type landing gear for testing, comprising a load-bearing module, a frame module and a buffer module; The load-bearing module includes first to third load-bearing units; like Figure 2 As shown, the first to third load-bearing units have the same structure, and all include a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limit clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; a limiting threaded blind hole for fixing the wheel axle is provided at the midpoint of the mounting ring; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The frame module comprises a first fixing beam, a connecting block, a second fixing beam, first to fourth engaging blocks, and first to seventh fixing bolts; like Figure 3As shown, the first fixed beam and the second fixed beam have the same structure, one end of each is provided with a threaded column, and the side wall is evenly provided with a first through groove and a second through groove along the length direction; the first through groove and the second through groove have the same structure, and both include a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected end to end in sequence, wherein the first arc-shaped groove wall and the second arc-shaped groove wall are both side walls of a semi-cylinder, and the opening directions are opposite; the first plane groove wall is provided with a first fixing through hole and a second fixing through hole respectively; The first to fourth engaging blocks have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The first engaging block and the mounting ring of the wheel axle can cooperate with the first through groove gap; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the first arc-shaped groove wall of the first through groove and the mounting ring of the wheel axle with corresponding gaps, the engaging threaded blind hole on the first engaging block and the first fixed through hole on the first through groove are connected and coaxial, and the limiting threaded blind hole on the wheel axle and the second fixed through hole on the first through groove are connected and coaxial; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the mounting ring of the wheel axle and the first arc-shaped groove wall of the first through groove with corresponding gaps, the engaging threaded blind hole on the first engaging block and the second fixed through hole on the first through groove are connected and coaxial, the limiting threaded blind hole on the wheel axle and the first fixed through hole on the first through groove are connected and coaxial; like Figure 4 As shown, the connecting block is a rectangular parallelepiped, comprising a first side wall, a second side wall, and first to fourth side walls connected end to end in sequence, the first side wall and the second side wall are respectively provided with threaded blind holes in the center for matching with the threaded columns on the first fixing beam and the second fixing beam; the first side wall and the third side wall are horizontal; the second side wall is provided with a through hole for matching with the wheel axle mounting ring clearance, the axis of the through hole and the axis of the threaded blind hole on the first side wall intersect vertically; the first side wall is provided with a third fixing through hole in the center for matching with the fifth fixing bolt; The threaded columns of the first fixing beam and the second fixing beam are respectively threadedly fixed to the threaded blind holes on the first side wall and the second side wall of the connecting block, so that the axes of the first through grooves of the first fixing beam and the second fixing beam are parallel to the axis of the through hole on the second side wall of the connecting block; The first engaging block and the mounting ring of the axle of the first load-bearing unit are arranged in the first through groove of the first fixed beam, and the second engaging block and the mounting ring of the axle of the second load-bearing unit are arranged in the first through groove of the second fixed beam; When the first fixing bolt passes through the first fixing through hole on the first through slot of the first fixing beam and the locking thread blind hole on the first locking block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the first through slot of the first fixing beam and the limiting thread blind hole on the axle of the first load-bearing unit and is threadedly fixed, the third fixing bolt passes through the first fixing through hole on the first through slot of the second fixing beam and the locking thread blind hole on the second locking block and is threadedly fixed, and the fourth fixing bolt passes through the second fixing through hole on the first through slot of the second fixing beam and the limiting thread blind hole on the axle of the second load-bearing unit and is threadedly fixed; When the first fixing bolt passes through the second fixing through hole on the first through slot of the first fixing beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixed, and the second fixing bolt passes through the first fixing through hole on the first through slot of the first fixing beam and the engaging threaded blind hole on the first engaging block and is threadedly fixed, the third fixing bolt passes through the second fixing through hole on the first through slot of the second fixing beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixed, and the fourth fixing bolt passes through the first fixing through hole on the first through slot of the second fixing beam and is threadedly fixed with the engaging threaded blind hole on the second engaging block; The fifth fixing bolt passes through the third fixing through hole on the connecting block and is fixedly connected with the limiting thread blind hole on the axle of the third load-bearing unit by thread. Figure 5 As shown; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; like Figure 6 As shown, the buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure, and the thickness is the same as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a third through groove with the same shape as the first through groove, and the third through groove also comprises a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected in sequence end to end, wherein the second plane groove wall is provided with a fourth fixing through hole; like Figure 7 As shown, the first side plate and the second side plate include the connecting block, the third through slot on the first side plate is respectively matched with the mounting ring of the third load-bearing unit axle and the third engaging block, and the third through slot on the second side plate is respectively matched with the mounting ring of the third load-bearing unit axle and the fourth engaging block; When the first arc wall and the second arc wall of the third engaging block are respectively matched with the first arc-shaped groove wall of the third through groove of the first side plate and the corresponding clearance of the mounting ring of the third load-bearing unit wheel axle, the first arc wall and the second arc wall of the fourth engaging block are respectively matched with the first arc-shaped groove wall of the third through groove of the second side plate and the corresponding clearance of the mounting ring of the third load-bearing unit wheel axle, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; When the first arc wall and the second arc wall of the third engaging block respectively cooperate with the corresponding clearances of the mounting ring of the third load-bearing unit axle and the first arc-shaped groove wall of the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively cooperate with the corresponding clearances of the mounting ring of the third load-bearing unit axle and the first arc-shaped groove wall of the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; like Figure 8 As shown, the piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0015] like Fig. 9 As shown, the present invention also discloses another test adjustable frame type landing gear, comprising a load-bearing module, a frame module and a buffer module; The load-bearing module includes first and second load-bearing units; The first to second load-bearing units have the same structure, and both include a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; a limiting threaded blind hole for fixing the wheel axle is provided at the midpoint of the mounting ring; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The frame module comprises a first fixing beam, a connecting block, a second fixing beam, first to fourth engaging blocks, a fixing shaft, and first to seventh fixing bolts; The first fixed beam and the second fixed beam have the same structure, and one end of each is provided with a threaded column, and the side wall is evenly provided with a first through groove and a second through groove along the length direction; the first through groove and the second through groove have the same structure, and both include a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected end to end in sequence, wherein the first arc-shaped groove wall and the second arc-shaped groove wall are both side walls of a semi-cylinder, and the opening directions are opposite; the first plane groove wall is provided with a first fixing through hole and a second fixing through hole respectively; The first to fourth engaging blocks have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The first engaging block and the mounting ring of the wheel axle can cooperate with the first through groove gap; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the first arc-shaped groove wall of the first through groove and the mounting ring of the wheel axle with corresponding gaps, the engaging threaded blind hole on the first engaging block and the first fixed through hole on the first through groove are connected and coaxial, and the limiting threaded blind hole on the wheel axle and the second fixed through hole on the first through groove are connected and coaxial; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the mounting ring of the wheel axle and the first arc-shaped groove wall of the first through groove with corresponding gaps, the engaging threaded blind hole on the first engaging block and the second fixed through hole on the first through groove are connected and coaxial, the limiting threaded blind hole on the wheel axle and the first fixed through hole on the first through groove are connected and coaxial; The connecting block is a rectangular parallelepiped, comprising a first side wall, a second side wall, and first to fourth side walls connected end to end in sequence, wherein the first side wall and the second side wall are respectively provided with threaded blind holes in the center thereof for matching with the threaded columns on the first fixing beam and the second fixing beam; the first side wall and the third side wall are horizontal; the second side wall is provided with a through hole for matching with the clearance of the wheel axle mounting ring, and the axis of the through hole intersects perpendicularly with the axis of the threaded blind hole on the first side wall; the first side wall is provided with a third fixing through hole in the center thereof for matching with the fifth fixing bolt; The threaded columns of the first fixing beam and the second fixing beam are respectively threadedly fixed to the threaded blind holes on the first side wall and the second side wall of the connecting block, so that the axes of the first through grooves of the first fixing beam and the second fixing beam are parallel to the axis of the through hole on the second side wall of the connecting block; like Fig. 9 As shown, when the first clamping block and the mounting ring of the wheel axle of the first load-bearing unit are arranged in the first through groove of the first fixing beam, the second clamping block and the mounting ring of the wheel axle of the second load-bearing unit are arranged in the first through groove of the second fixing beam; at this time, if the first fixing bolt passes through the first fixing through hole on the first through groove of the first fixing beam and the clamping threaded blind hole on the first clamping block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the first through groove of the first fixing beam and the limiting threaded blind hole on the wheel axle of the first load-bearing unit and is threadedly fixed, then the third fixing bolt passes through the first fixing through hole on the first through groove of the second fixing beam and the clamping threaded blind hole on the second clamping block and is threadedly fixed, and the fourth fixing bolt passes through the first fixing through hole on the first through groove of the second fixing beam and is threadedly fixed The second fixing through hole on the first through slot of the second fixing beam is threadedly fixedly connected with the limiting threaded blind hole on the axle of the second load-bearing unit; if the first fixing bolt passes through the second fixing through hole on the first through slot of the first fixing beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixedly connected, and the second fixing bolt passes through the first fixing through hole on the first through slot of the first fixing beam and the locking threaded blind hole on the first locking block and is threadedly fixedly connected, the third fixing bolt passes through the second fixing through hole on the first through slot of the second fixing beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixedly connected, and the fourth fixing bolt passes through the first fixing through hole on the first through slot of the second fixing beam and is threadedly fixedly connected with the locking threaded blind hole on the second locking block; like Fig.10As shown, when the first clamping block and the mounting ring of the wheel axle of the first load-bearing unit are arranged in the second through groove of the first fixing beam, the second clamping block and the mounting ring of the wheel axle of the second load-bearing unit are arranged in the second through groove of the second fixing beam; at this time, if the first fixing bolt passes through the first fixing through hole on the second through groove of the first fixing beam and the clamping threaded blind hole on the first clamping block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the second through groove of the first fixing beam and the limiting threaded blind hole on the wheel axle of the first load-bearing unit and is threadedly fixed, then the third fixing bolt passes through the first fixing through hole on the second through groove of the second fixing beam and the clamping threaded blind hole on the second clamping block and is threadedly fixed, and the fourth fixing bolt passes through the first fixing through hole on the second through groove of the second fixing beam and is threadedly fixed The second fixing through hole on the second through slot of the second fixing beam is threadedly fixedly connected with the limiting threaded blind hole on the wheel axle of the second load-bearing unit; if the first fixing bolt passes through the second fixing through hole on the second through slot of the first fixing beam and the limiting threaded blind hole on the wheel axle of the first load-bearing unit and is threadedly fixedly connected, and the second fixing bolt passes through the first fixing through hole on the second through slot of the first fixing beam and the locking threaded blind hole on the first locking block and is threadedly fixedly connected, the third fixing bolt passes through the second fixing through hole on the second through slot of the second fixing beam and the limiting threaded blind hole on the wheel axle of the second load-bearing unit and is threadedly fixedly connected, and the fourth fixing bolt passes through the first fixing through hole on the second through slot of the second fixing beam and is threadedly fixedly connected with the locking threaded blind hole on the second locking block; The fixed shaft is a cylinder having the same shape as the mounting ring of the wheel axle, and a limiting threaded blind hole is provided at its midpoint; The fifth fixing bolt passes through the third fixing through hole on the connecting block and is threadedly fixed to the limiting threaded blind hole on the fixing shaft; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a third through groove with the same shape as the first through groove, and the third through groove also comprises a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected in sequence end to end, wherein the second plane groove wall is provided with a fourth fixing through hole; The first side plate and the second side plate include the connecting block, the third through slot on the first side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the third engaging block, and the third through slot on the second side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the fourth engaging block; When the first arc wall and the second arc wall of the third engaging block respectively cooperate with the first arc groove wall and the corresponding clearance of the fixed shaft of the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively cooperate with the first arc groove wall and the corresponding clearance of the fixed shaft of the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; When the first arc wall and the second arc wall of the third engaging block respectively match with the corresponding clearances of the first arc-shaped groove wall of the fixed shaft and the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively match with the corresponding clearances of the first arc-shaped groove wall of the fixed shaft and the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0016] like Fig.11 As shown, the present invention also discloses another test adjustable frame type landing gear, comprising a load-bearing unit, a first engaging block, a second engaging block, a buffer module, and first to fourth fixing bolts; The load-bearing unit comprises a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; two ends of the mounting ring are respectively provided with a first limiting threaded blind hole and a second limiting threaded blind hole for fixing the wheel axle; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The first engaging block and the second engaging block have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the thickness is the same as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a first fixed through groove and a second fixed through groove, the first fixed through groove and the second fixed through groove have the same structure and both comprise a first arcuate groove wall, a first plane groove wall, a second arcuate groove wall and a second plane groove wall which are connected end to end in sequence, wherein the first arcuate groove wall and the second arcuate groove wall are both side walls of a semi-cylinder with opposite opening directions; the second plane groove wall is provided with a first fixed through hole and a second fixed through hole; The first engaging block and the mounting ring of the wheel shaft can be loosely matched with the first fixed through groove, and the second engaging block and the mounting ring of the wheel shaft can be loosely matched with the second fixed through groove; like Fig.12 As shown, when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the corresponding clearances of the first arc-shaped groove wall of the first fixed through groove and the mounting ring of the wheel axle, the first arc wall and the second arc wall of the second engaging block respectively cooperate with the corresponding clearances of the first arc-shaped groove wall of the second fixed through groove and the mounting ring of the wheel axle, the first fixing bolt passes through the first fixing through hole on the first fixing through groove and is threadedly connected with the engaging threaded blind hole on the first engaging block, the second fixing bolt passes through the second fixing through hole on the first fixing through groove and is threadedly connected with the first limiting threaded blind hole on the wheel axle; the third fixing bolt passes through the first fixing through hole on the second fixing through groove and is threadedly connected with the engaging threaded blind hole on the second engaging block, and the fourth fixing bolt passes through the second fixing through hole on the second fixing through groove and is threadedly connected with the second limiting threaded blind hole on the wheel axle; When the first arc wall and the second arc wall of the first engaging block respectively cooperate with the corresponding clearances of the mounting ring of the wheel axle and the first arc groove wall of the first fixed through groove, the first arc wall and the second arc groove wall of the second engaging block respectively cooperate with the corresponding clearances of the mounting ring of the wheel axle and the first arc groove wall of the second fixed through groove, the first fixing bolt passes through the first fixing through hole on the first fixing through groove and is threadedly connected with the first limiting thread blind hole on the wheel axle, the second fixing bolt passes through the second fixing through hole on the first fixing through groove and is threadedly connected with the engaging thread blind hole on the first engaging block; the third fixing bolt passes through the first fixing through hole on the second fixing through groove and is threadedly connected with the second limiting thread blind hole on the wheel axle, the fourth fixing bolt passes through the second fixing through hole on the second fixing through groove and is threadedly connected with the engaging thread blind hole on the second engaging block; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0017] like Fig.13 As shown, the present invention also discloses another test adjustable frame type landing gear, comprising a load-bearing unit, a first adjustment block, a second adjustment block, a buffer module, and first to second fixing bolts; The load-bearing unit comprises a wheel axle, a wheel and a bearing; the inner ring of the bearing is sleeved at the midpoint of the wheel axle and is coaxially fixedly connected to the wheel axle; the wheel hub of the wheel is coaxially fixedly connected to the outer ring of the bearing; The first adjustment block and the second adjustment block have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder with opposite opening directions; the first flat wall and the second flat wall are respectively provided with a first adjustment threaded blind hole and a second adjustment threaded blind hole, and the first end wall is provided with a mounting through hole; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a first fixed through groove and a second fixed through groove, the first fixed through groove, the second fixed through groove and the first adjustment block have the same shape, and all comprise a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall and a second plane groove wall connected end to end in sequence, and a fixing through hole is provided on the second plane groove wall; The first adjustment block can be matched with the first fixed through slot with a clearance, and the second adjustment block can be matched with the second fixed through slot with a clearance; When the first arc wall of the first adjusting block and the first arc groove wall gap of the first fixed through groove are matched, the first arc wall of the second adjusting block and the first arc groove wall gap of the second fixed through groove are matched, the first fixing bolt passes through the fixing through hole on the first fixed through groove and is threadedly fixedly connected with the first adjusting thread blind hole on the first adjusting block, and the second fixing bolt passes through the fixing through hole on the second fixed through groove and is threadedly fixedly connected with the first adjusting thread blind hole on the second adjusting block; When the first arc wall of the first adjusting block and the second arc groove wall gap of the first fixed through groove are matched, the first arc wall of the second adjusting block and the second arc groove wall gap of the second fixed through groove are matched, the first fixing bolt passes through the fixing through hole on the first fixed through groove and is threadedly fixedly connected with the second adjusting thread blind hole on the first adjusting block, and the second fixing bolt passes through the fixing through hole on the second fixed through groove and is threadedly fixedly connected with the second adjusting thread blind hole on the second adjusting block; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

[0018] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0019] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test adjustable configuration frame type landing gear, characterized in that: It includes a load-bearing module, a frame module and a buffer module; The load-bearing module includes first to third load-bearing units; The first to third load-bearing units have the same structure, and all include a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; a limiting threaded blind hole for fixing the wheel axle is provided at the midpoint of the mounting ring; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The frame module comprises a first fixing beam, a connecting block, a second fixing beam, first to fourth engaging blocks, and first to seventh fixing bolts; The first fixed beam and the second fixed beam have the same structure, and one end of each is provided with a threaded column, and the side wall is evenly provided with a first through groove and a second through groove along the length direction; the first through groove and the second through groove have the same structure, and both include a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected end to end in sequence, wherein the first arc-shaped groove wall and the second arc-shaped groove wall are both side walls of a semi-cylinder, and the opening directions are opposite; the first plane groove wall is provided with a first fixing through hole and a second fixing through hole respectively; The first to fourth engaging blocks have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The first engaging block and the mounting ring of the wheel axle can cooperate with the first through groove gap; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the first arc-shaped groove wall of the first through groove and the mounting ring of the wheel axle with corresponding gaps, the engaging threaded blind hole on the first engaging block and the first fixed through hole on the first through groove are connected and coaxial, and the limiting threaded blind hole on the wheel axle and the second fixed through hole on the first through groove are connected and coaxial; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the mounting ring of the wheel axle and the first arc-shaped groove wall of the first through groove with corresponding gaps, the engaging threaded blind hole on the first engaging block and the second fixed through hole on the first through groove are connected and coaxial, the limiting threaded blind hole on the wheel axle and the first fixed through hole on the first through groove are connected and coaxial; The connecting block is a rectangular parallelepiped, comprising a first side wall, a second side wall, and first to fourth side walls connected end to end in sequence, wherein the first side wall and the second side wall are respectively provided with threaded blind holes in the center thereof for matching with the threaded columns on the first fixing beam and the second fixing beam; the first side wall and the third side wall are horizontal; the second side wall is provided with a through hole for matching with the clearance of the wheel axle mounting ring, and the axis of the through hole intersects perpendicularly with the axis of the threaded blind hole on the first side wall; the first side wall is provided with a third fixing through hole in the center thereof for matching with the fifth fixing bolt; The threaded columns of the first fixing beam and the second fixing beam are respectively threadedly fixed to the threaded blind holes on the first side wall and the second side wall of the connecting block, so that the axes of the first through grooves of the first fixing beam and the second fixing beam are parallel to the axis of the through hole on the second side wall of the connecting block; The first engaging block and the mounting ring of the axle of the first load-bearing unit are arranged in the first through groove of the first fixed beam, and the second engaging block and the mounting ring of the axle of the second load-bearing unit are arranged in the first through groove of the second fixed beam; When the first fixing bolt passes through the first fixing through hole on the first through slot of the first fixing beam and the locking thread blind hole on the first locking block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the first through slot of the first fixing beam and the limiting thread blind hole on the axle of the first load-bearing unit and is threadedly fixed, the third fixing bolt passes through the first fixing through hole on the first through slot of the second fixing beam and the locking thread blind hole on the second locking block and is threadedly fixed, and the fourth fixing bolt passes through the second fixing through hole on the first through slot of the second fixing beam and the limiting thread blind hole on the axle of the second load-bearing unit and is threadedly fixed; When the first fixing bolt passes through the second fixing through hole on the first through slot of the first fixing beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixed, and the second fixing bolt passes through the first fixing through hole on the first through slot of the first fixing beam and the engaging threaded blind hole on the first engaging block and is threadedly fixed, the third fixing bolt passes through the second fixing through hole on the first through slot of the second fixing beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixed, and the fourth fixing bolt passes through the first fixing through hole on the first through slot of the second fixing beam and is threadedly fixed with the engaging threaded blind hole on the second engaging block; The fifth fixing bolt passes through the third fixing through hole on the connecting block and is threadedly fixed to the limiting threaded blind hole on the axle of the third load-bearing unit; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a third through groove with the same shape as the first through groove, and the third through groove also comprises a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected in sequence end to end, wherein the second plane groove wall is provided with a fourth fixing through hole; The first side plate and the second side plate include the connecting block, the third through slot on the first side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the third engaging block, and the third through slot on the second side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the fourth engaging block; When the first arc wall and the second arc wall of the third engaging block are respectively matched with the first arc-shaped groove wall of the third through groove of the first side plate and the corresponding clearance of the mounting ring of the third load-bearing unit wheel axle, the first arc wall and the second arc wall of the fourth engaging block are respectively matched with the first arc-shaped groove wall of the third through groove of the second side plate and the corresponding clearance of the mounting ring of the third load-bearing unit wheel axle, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; When the first arc wall and the second arc wall of the third engaging block respectively cooperate with the corresponding clearances of the mounting ring of the third load-bearing unit axle and the first arc-shaped groove wall of the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively cooperate with the corresponding clearances of the mounting ring of the third load-bearing unit axle and the first arc-shaped groove wall of the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

2. An adjustable frame landing gear for testing, characterized in that: It includes a load-bearing module, a frame module and a buffer module; The load-bearing module includes first and second load-bearing units; The first to second load-bearing units have the same structure, and both include a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; a limiting threaded blind hole for fixing the wheel axle is provided at the midpoint of the mounting ring; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The frame module comprises a first fixing beam, a connecting block, a second fixing beam, first to fourth engaging blocks, a fixing shaft, and first to seventh fixing bolts; The first fixed beam and the second fixed beam have the same structure, and one end of each is provided with a threaded column, and the side wall is evenly provided with a first through groove and a second through groove along the length direction; the first through groove and the second through groove have the same structure, and both include a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected end to end in sequence, wherein the first arc-shaped groove wall and the second arc-shaped groove wall are both side walls of a semi-cylinder, and the opening directions are opposite; the first plane groove wall is provided with a first fixing through hole and a second fixing through hole respectively; The first to fourth engaging blocks have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The first engaging block and the mounting ring of the wheel axle can cooperate with the first through groove gap; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the first arc-shaped groove wall of the first through groove and the mounting ring of the wheel axle with corresponding gaps, the engaging threaded blind hole on the first engaging block and the first fixed through hole on the first through groove are connected and coaxial, and the limiting threaded blind hole on the wheel axle and the second fixed through hole on the first through groove are connected and coaxial; when the first arc wall and the second arc wall of the first engaging block respectively cooperate with the mounting ring of the wheel axle and the first arc-shaped groove wall of the first through groove with corresponding gaps, the engaging threaded blind hole on the first engaging block and the second fixed through hole on the first through groove are connected and coaxial, the limiting threaded blind hole on the wheel axle and the first fixed through hole on the first through groove are connected and coaxial; The connecting block is a rectangular parallelepiped, comprising a first side wall, a second side wall, and first to fourth side walls connected end to end in sequence, wherein the first side wall and the second side wall are respectively provided with threaded blind holes in the center thereof for matching with the threaded columns on the first fixing beam and the second fixing beam; the first side wall and the third side wall are horizontal; the second side wall is provided with a through hole for matching with the clearance of the wheel axle mounting ring, and the axis of the through hole intersects perpendicularly with the axis of the threaded blind hole on the first side wall; the first side wall is provided with a third fixing through hole in the center thereof for matching with the fifth fixing bolt; The threaded columns of the first fixing beam and the second fixing beam are respectively threadedly fixed to the threaded blind holes on the first side wall and the second side wall of the connecting block, so that the axes of the first through grooves of the first fixing beam and the second fixing beam are parallel to the axis of the through hole on the second side wall of the connecting block; When the first clamping block and the mounting ring of the wheel axle of the first load-bearing unit are arranged in the first through groove of the first fixing beam, the second clamping block and the mounting ring of the wheel axle of the second load-bearing unit are arranged in the first through groove of the second fixing beam; at this time, if the first fixing bolt passes through the first fixing through hole on the first through groove of the first fixing beam and the clamping threaded blind hole on the first clamping block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the first through groove of the first fixing beam and the limiting threaded blind hole on the wheel axle of the first load-bearing unit and is threadedly fixed, then the third fixing bolt passes through the first fixing through hole on the first through groove of the second fixing beam and is threadedly fixed with the clamping threaded blind hole on the second clamping block, and the fourth fixing bolt passes through the second fixing The second fixing through hole on the first through slot of the fixed beam is threadedly fixedly connected with the limiting threaded blind hole on the axle of the second load-bearing unit; if the first fixing bolt passes through the second fixing through hole on the first through slot of the first fixed beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixedly connected, and the second fixing bolt passes through the first fixing through hole on the first through slot of the first fixed beam and the engaging threaded blind hole on the first engaging block and is threadedly fixedly connected, the third fixing bolt passes through the second fixing through hole on the first through slot of the second fixed beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixedly connected, and the fourth fixing bolt passes through the first fixing through hole on the first through slot of the second fixed beam and is threadedly fixedly connected with the engaging threaded blind hole on the second engaging block; When the first clamping block and the mounting ring of the wheel axle of the first load-bearing unit are arranged in the second through groove of the first fixing beam, the second clamping block and the mounting ring of the wheel axle of the second load-bearing unit are arranged in the second through groove of the second fixing beam; at this time, if the first fixing bolt passes through the first fixing through hole on the second through groove of the first fixing beam and the clamping threaded blind hole on the first clamping block and is threadedly fixed, and the second fixing bolt passes through the second fixing through hole on the second through groove of the first fixing beam and the limiting threaded blind hole on the wheel axle of the first load-bearing unit and is threadedly fixed, then the third fixing bolt passes through the first fixing through hole on the second through groove of the second fixing beam and is threadedly fixed with the clamping threaded blind hole on the second clamping block, and the fourth fixing bolt passes through the second fixing The second fixing through hole on the second through slot of the fixed beam is threadedly fixedly connected with the limiting threaded blind hole on the axle of the second load-bearing unit; if the first fixing bolt passes through the second fixing through hole on the second through slot of the first fixed beam and the limiting threaded blind hole on the axle of the first load-bearing unit and is threadedly fixedly connected, and the second fixing bolt passes through the first fixing through hole on the second through slot of the first fixed beam and the engaging threaded blind hole on the first engaging block and is threadedly fixedly connected, the third fixing bolt passes through the second fixing through hole on the second through slot of the second fixed beam and the limiting threaded blind hole on the axle of the second load-bearing unit and is threadedly fixedly connected, and the fourth fixing bolt passes through the first fixing through hole on the second through slot of the second fixed beam and is threadedly fixedly connected with the engaging threaded blind hole on the second engaging block; The fixed shaft is a cylinder having the same shape as the mounting ring of the wheel axle, and a limiting threaded blind hole is provided at its midpoint; The fifth fixing bolt passes through the third fixing through hole on the connecting block and is threadedly fixed to the limiting threaded blind hole on the fixing shaft; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a third through groove with the same shape as the first through groove, and the third through groove also comprises a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall, and a second plane groove wall connected in sequence end to end, wherein the second plane groove wall is provided with a fourth fixing through hole; The first side plate and the second side plate include the connecting block, the third through slot on the first side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the third engaging block, and the third through slot on the second side plate is respectively matched with the mounting ring of the axle of the third load-bearing unit and the fourth engaging block; When the first arc wall and the second arc wall of the third engaging block respectively cooperate with the first arc groove wall and the corresponding clearance of the fixed shaft of the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively cooperate with the first arc groove wall and the corresponding clearance of the fixed shaft of the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; When the first arc wall and the second arc wall of the third engaging block respectively match with the corresponding clearances of the first arc-shaped groove wall of the fixed shaft and the third through groove of the first side plate, the first arc wall and the second arc wall of the fourth engaging block respectively match with the corresponding clearances of the first arc-shaped groove wall of the fixed shaft and the third through groove of the second side plate, the sixth fixing bolt passes through the fourth fixing through hole of the first side plate and the engaging threaded blind hole on the third engaging block and is threadedly fixed, and the seventh fixing bolt passes through the fourth fixing through hole of the second side plate and the engaging threaded blind hole on the fourth engaging block and is threadedly fixed; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

3. An adjustable configuration frame type landing gear for testing, characterized in that: It includes a load-bearing unit, a first clamping block, a second clamping block, a buffer module, and first to fourth fixing bolts; The load-bearing unit comprises a wheel axle, first to second wheels, first to second bearings, first to second bushings, and first to second limiting clamps; The wheel axle comprises a shaft body and a mounting ring, wherein the mounting ring is sleeved in the middle of the shaft body and is coaxially fixed to the shaft body; two ends of the mounting ring are respectively provided with a first limiting threaded blind hole and a second limiting threaded blind hole for fixing the wheel axle; The outer ring of the first bearing is coaxially fixedly connected to the wheel hub of the first wheel, and the inner ring is sleeved on one end of the shaft body; the first sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end of which is against the inner ring of the first bearing; the first limiting clamp is against the end of the inner ring of the first bearing away from the first sleeve, and the first limiting clamp is coaxially fixedly connected to the shaft body, so that the first bearing is fixed in the radial direction; The outer ring of the second bearing is coaxially fixedly connected to the hub of the second wheel, and the inner ring is sleeved on one end of the shaft body; the second sleeve is sleeved on the shaft body, one end of which is against the mounting ring, and the other end is against the inner ring of the second bearing; the second limiting clamp is against the end of the inner ring of the second bearing away from the second sleeve, and the second limiting clamp is coaxially fixedly connected to the shaft body, so that the second bearing is fixed in the radial direction; The first engaging block and the second engaging block have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder and have the same opening direction; a locking threaded blind hole is provided on the first flat wall; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the thickness is the same as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a first fixed through groove and a second fixed through groove, the first fixed through groove and the second fixed through groove have the same structure and both comprise a first arcuate groove wall, a first plane groove wall, a second arcuate groove wall and a second plane groove wall which are connected end to end in sequence, wherein the first arcuate groove wall and the second arcuate groove wall are both side walls of a semi-cylinder with opposite opening directions; the second plane groove wall is provided with a first fixed through hole and a second fixed through hole; The first engaging block and the mounting ring of the wheel shaft can be loosely matched with the first fixed through groove, and the second engaging block and the mounting ring of the wheel shaft can be loosely matched with the second fixed through groove; When the first arc wall and the second arc wall of the first engaging block respectively cooperate with the corresponding clearances of the first arc groove wall of the first fixed through groove and the mounting ring of the wheel axle, the first arc wall and the second arc wall of the second engaging block respectively cooperate with the corresponding clearances of the first arc groove wall of the second fixed through groove and the mounting ring of the wheel axle, the first fixing bolt passes through the first fixing through hole on the first fixing through groove and is threadedly connected with the engaging threaded blind hole on the first engaging block, the second fixing bolt passes through the second fixing through hole on the first fixing through groove and is threadedly connected with the first limiting threaded blind hole on the wheel axle; the third fixing bolt passes through the first fixing through hole on the second fixing through groove and is threadedly connected with the engaging threaded blind hole on the second engaging block, and the fourth fixing bolt passes through the second fixing through hole on the second fixing through groove and is threadedly connected with the second limiting threaded blind hole on the wheel axle; When the first arc wall and the second arc wall of the first engaging block respectively cooperate with the corresponding clearances of the mounting ring of the wheel axle and the first arc groove wall of the first fixed through groove, the first arc wall and the second arc groove wall of the second engaging block respectively cooperate with the corresponding clearances of the mounting ring of the wheel axle and the first arc groove wall of the second fixed through groove, the first fixing bolt passes through the first fixing through hole on the first fixing through groove and is threadedly connected with the first limiting thread blind hole on the wheel axle, the second fixing bolt passes through the second fixing through hole on the first fixing through groove and is threadedly connected with the engaging thread blind hole on the first engaging block; the third fixing bolt passes through the first fixing through hole on the second fixing through groove and is threadedly connected with the second limiting thread blind hole on the wheel axle, the fourth fixing bolt passes through the second fixing through hole on the second fixing through groove and is threadedly connected with the engaging thread blind hole on the second engaging block; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

4. An adjustable configuration frame type landing gear for testing, characterized in that: It includes a load-bearing unit, a first adjusting block, a second adjusting block, a buffer module, and first to second fixing bolts; The load-bearing unit comprises a wheel axle, a wheel and a bearing; the inner ring of the bearing is sleeved at the midpoint of the wheel axle and is coaxially fixedly connected to the wheel axle; the wheel hub of the wheel is coaxially fixedly connected to the outer ring of the bearing; The first adjustment block and the second adjustment block have the same structure and are cylindrical, comprising a first end wall, a second end wall, and a first arc wall, a first flat wall, a second arc wall, and a second flat wall connected end to end in sequence, wherein the first arc wall and the second arc wall are both side walls of a semi-cylinder with opposite opening directions; the first flat wall and the second flat wall are respectively provided with a first adjustment threaded blind hole and a second adjustment threaded blind hole, and the first end wall is provided with a mounting through hole; The buffer module comprises an oil-gas buffer, a first hinge seat, a second hinge seat, an upper anti-torsion arm, a lower anti-torsion arm and a buffer base; The buffer base comprises a top plate, a first side plate and a second side plate, wherein the first side plate and the second side plate have the same structure and the same thickness as the diameter of the first fixed beam; one end of the top plate is vertically fixedly connected to the upper end of the first side plate, and the other end is vertically fixedly connected to the upper end of the second side plate to form a U-shaped structure; the first side plate and the second side plate are respectively provided with a first fixed through groove and a second fixed through groove, the first fixed through groove, the second fixed through groove and the first adjustment block have the same shape, and all comprise a first arc-shaped groove wall, a first plane groove wall, a second arc-shaped groove wall and a second plane groove wall connected end to end in sequence, and a fixing through hole is provided on the second plane groove wall; The first adjustment block can be matched with the first fixed through slot with a clearance, and the second adjustment block can be matched with the second fixed through slot with a clearance; When the first arc wall of the first adjusting block and the first arc groove wall gap of the first fixed through groove are matched, the first arc wall of the second adjusting block and the first arc groove wall gap of the second fixed through groove are matched, the first fixing bolt passes through the fixing through hole on the first fixed through groove and is threadedly fixedly connected with the first adjusting thread blind hole on the first adjusting block, and the second fixing bolt passes through the fixing through hole on the second fixed through groove and is threadedly fixedly connected with the first adjusting thread blind hole on the second adjusting block; When the first arc wall of the first adjusting block and the second arc groove wall gap of the first fixed through groove are matched, the first arc wall of the second adjusting block and the second arc groove wall gap of the second fixed through groove are matched, the first fixing bolt passes through the fixing through hole on the first fixed through groove and is threadedly fixedly connected with the second adjusting thread blind hole on the first adjusting block, and the second fixing bolt passes through the fixing through hole on the second fixed through groove and is threadedly fixedly connected with the second adjusting thread blind hole on the second adjusting block; The piston rod of the oil-gas buffer is vertically fixedly connected to the center of the upper end surface of the top plate; The first articulated seat is fixed on the piston cylinder of the oil-gas buffer, and the second articulated seat is fixed on the top plate; one end of the upper anti-torsion arm is articulated to the first articulated seat, and the other end is articulated to one end of the lower anti-torsion arm; the other end of the lower anti-torsion arm is articulated to the second articulated seat; the movable planes of the upper anti-torsion arm and the lower anti-torsion arm are parallel to the first side plate.

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