Flexible installation vehicle for undercarriage test equipment

Abstract

The invention provides a flexible installation vehicle for undercarriage test equipment. The flexible installation vehicle for the undercarriage test equipment comprises a moving vehicle, a translation driving mechanism, a flexible arm, a bracket, a lifting mechanism, a V-shaped clamping jaw, a fixing block and a rotating mechanism, the translation driving mechanism is arranged on the moving vehicle, the bracket is installed at the tail end of the flexible arm through a swing cylinder, the lifting mechanism is arranged on the bracket, and the V-shaped clamping jaw is arranged on the moving vehicle. A V-shaped clamping jaw is installed at the upper end of the bracket through the lifting mechanism, the lifting mechanism is used for driving the V-shaped clamping jaw to move in the vertical direction Z, a fixing frame is arranged at the lower end of the bracket, and a fixing block used for fixing an undercarriage tire is arranged on the fixing frame through a rotating mechanism. Large-range transfer of the undercarriage can be achieved, the heading direction, the lateral direction, the vertical direction and the attitude angle can be conveniently adjusted, the structure is simple, and the device can adapt to the limitation that the space of semi-closed test equipment is limited.

Description

Technical Field

[0001] This invention relates to the field of landing gear processing technology, and in particular to a flexible mounting vehicle for landing gear testing equipment. Background Technology

[0002] The landing gear system plays a crucial role in aircraft takeoff and landing. Before leaving the factory, it needs to undergo various tests, including drop vibration, static, shimmy, fatigue, and retraction tests. The installation attitude and fitting position of the landing gear vary in different types of tests, and fine-tuning of large landing gear in a semi-enclosed space is particularly difficult.

[0003] like Figure 1 As shown, a certain type of landing gear, with its main slewing shaft 101, retraction actuator 102, and outer cylinder 103 integrated and fixed to the aircraft fuselage, has a piston rod 104 connected to the outer cylinder 103 via a dynamic seal. A wheel axle 105 is connected to the piston rod 104, and a wheel tire 106 is mounted on the wheel axle 105. During flight landing and ground taxiing, the piston rod 104 and outer cylinder 103 absorb some energy through compression, while the remaining energy is absorbed through the deformation of the wheel tire 105. In drop tests, variable-stroke static fatigue tests, and oscillation tests, the landing gear needs to be placed in a closed space for fine-tuning of its attitude, including yaw, lateral tilt, vertical dynamic adjustment, and rotation around the main slewing shaft 101, to adapt to the attitude angle requirements of the landing gear under different test conditions.

[0004] Existing methods for transporting and installing test specimens often involve using specialized equipment such as overhead cranes and forklifts. This can easily damage the specimens and cause significant quality issues to their surfaces. In particular, for tests such as drop vibration tests, static fatigue tests, and oscillation tests conducted in enclosed spaces above the landing gear, the enclosed space above the equipment prevents the use of overhead cranes. Furthermore, due to the clearance fit in the assembly, the center of gravity of the test specimen cannot be fully identified, making it difficult to maintain balance when lifting it with a forklift. This necessitates repeated adjustments and installations, requiring substantial manpower and resources, resulting in long safety cycles and numerous safety hazards, which is detrimental to the use of large test specimens. Summary of the Invention

[0005] The purpose of this invention is to provide a flexible installation vehicle for landing gear testing equipment, which is suitable for the installation and fine-tuning of landing gear or similar products in a semi-enclosed limited space.

[0006] The technical scheme of the present application is: a flexible mounting vehicle for landing gear test equipment, comprising a moving vehicle, a translation driving mechanism, a flexible arm, a bracket, a lifting mechanism, a V-shaped clamping jaw, a fixing block and a rotating mechanism, the translation driving mechanism is arranged on the moving vehicle, the translation driving mechanism is used to drive the flexible arm to move along the heading direction X, the lateral direction Y and the horizontal rotation, the end of the flexible arm is provided with the bracket through a swing cylinder, the lifting mechanism is arranged on the bracket, the upper end of the bracket is provided with the V-shaped clamping jaw through the lifting mechanism, the lifting mechanism is used to drive the V-shaped clamping jaw to move along the vertical direction Z, the lower end of the bracket is provided with a fixing frame, and the fixing frame is provided with the fixing block for fixing the landing gear tire through the rotating mechanism.

[0007] Preferably, the V-shaped clamping jaw is connected to the lifting mechanism through a mounting seat, one side of the mounting seat away from the lifting mechanism is provided with a circular arc groove, and the flexible mounting vehicle for landing gear test equipment further comprises a rotating driving mechanism used to drive the V-shaped clamping jaw to move and displace along the circular arc groove.

[0008] Preferably, the rotating driving mechanism comprises an internal gear rack arranged on the inner wall of the circular arc groove, a rotating motor arranged on the V-shaped clamping jaw, a first driving gear arranged on the motor shaft of the rotating motor and engaged with the internal gear rack, and an arc-shaped sliding rail matched with the shape of the circular arc groove is arranged on the upper surface of the mounting seat, and a second sliding block connected to the arc-shaped sliding rail is arranged on the V-shaped clamping jaw.

[0009] Preferably, the V-shaped clamping jaw comprises a clamping block, a first screw rod, a first motor, a clamping jaw sliding rail, a base and a first sliding block, the base is connected with the rotating driving mechanism, a clamping jaw sliding rail, a first motor and a first screw rod rotatingly arranged are arranged on the side surface of the base, the first motor is drivingly connected with the first screw rod, the clamping block is threadedly connected with the first screw rod, two clamping blocks are oppositely arranged, a first sliding block is arranged on each clamping block, and the first sliding block is slidingly connected with the clamping jaw sliding rail.

[0010] Preferably, the lifting mechanism comprises a second motor, a second screw rod, a bracket sliding rail and a third sliding block, the second motor is mounted on the bracket, the mounting seat is threadedly connected with the second screw rod, the second motor is drivingly connected with the second screw rod, the bracket sliding rail is arranged on the bracket, and the third sliding block connected with the bracket sliding rail is arranged on the mounting seat.

[0011] Preferably, the translation driving mechanism comprises a cross slide capable of providing driving force in the heading direction X and the lateral direction Y and a slewing bearing capable of providing rotation driving force along the Z direction, the cross slide is arranged on the moving vehicle, the slewing bearing is mounted on the cross slide, and the flexible arm is mounted on the slewing bearing.

[0012] Preferably, the cross slide table comprises a heading guide rail, a heading slider, a first screw motor, a lateral guide rail, a lateral slider, a second screw motor, a lower platform and an upper platform, the heading guide rail is arranged on the mobile vehicle, the lower end of the lower platform is provided with the heading slider connected to the heading guide rail, the first screw motor is used to drive the lower platform to move along the heading direction X; the lateral guide rail is arranged on the lower platform, the lower end of the upper platform is provided with the lateral slider connected to the lateral guide rail, and the second screw motor is used to drive the upper platform to move along the lateral direction Y; and the slewing bearing is arranged on the upper platform.

[0013] Preferably, the slewing bearing comprises a gear ring arranged on the cross slide table and a servo motor arranged at the lower end of the flexible arm, and the servo motor is provided with a second driving gear engaged with the gear ring.

[0014] Preferably, the flexible arm comprises a lower adjusting arm, an upper adjusting arm, a first electric cylinder, a second electric cylinder and a turntable plate, the turntable plate is connected to the translation driving mechanism, the lower end of the lower adjusting arm is hinged to the turntable plate, the upper end of the lower adjusting arm is hinged to the lower end of the upper adjusting arm, the upper end of the upper adjusting arm is hinged to the swing cylinder, the first electric cylinder is connected between the upper adjusting arm and the lower adjusting arm, and the second electric cylinder is connected between the lower adjusting arm and the turntable plate.

[0015] Preferably, the flexible arm is arranged at one end of the mobile vehicle, and the other end of the mobile vehicle is provided with a counterweight.

[0016] Compared with the related art, the present application has the following beneficial effects: 1. The present application can realize large-range transfer of the landing gear, convenient adjustment of the heading direction, the lateral direction, the vertical direction and the attitude angle, has a simple structure and can adapt to the limitation of space of the semi-closed test equipment; 2. The present application has strong universality, can quickly adapt to landing gear products of different specifications, different diameters and different heights through the driving motor screw, and can realize quick replacement and application; 3. The present application arranges the flexible arm on the mobile vehicle, can solve the problem that the mobile vehicle cannot enter the semi-closed space, and plays a role of heading extension. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of a certain type of landing gear; Figure 2 It is a front view structural schematic view of the flexible mounting vehicle for the landing gear test equipment provided by the present application; Figure 3 It is a three-dimensional structural schematic view of the flexible mounting vehicle for the landing gear test equipment provided by the present application; Figure 4 It is a structural schematic view of the translation driving mechanism; Figure 5 A schematic diagram of the V-shaped gripper structure (I); Figure 6 Schematic diagram of the V-shaped gripper (II). Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" used below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0019] like Figure 2 , Figure 3 As shown, the flexible mounting vehicle for landing gear testing equipment provided in this embodiment includes a moving vehicle 1, a translation drive mechanism 3, a flexible arm 7, a bracket 11, a lifting mechanism 12, a V-shaped gripper 4, a fixing block 16, and a rotating mechanism 17. The translation drive mechanism 3 is mounted on the moving vehicle 1 and is used to drive the flexible arm 7 to rotate along the X-axis, Y-axis, and horizontal directions. The bracket 11 is mounted at the end of the flexible arm 7 via a swing cylinder 10. The lifting mechanism 12 is mounted on the bracket 11. The V-shaped gripper 4 is mounted on the upper end of the bracket 11 via the lifting mechanism 12. The lifting mechanism 12 is used to drive the V-shaped gripper 4 to move vertically along the Z-axis. A fixing frame 111 is provided at the lower end of the bracket 11. A fixing block 16 for fixing the landing gear tires is provided on the fixing frame 111 via the rotating mechanism 17. The V-shaped gripper 4 is connected to the lifting mechanism 12 via a mounting base 5. The mounting base 5 has a semi-circular arc groove 51 on the side away from the lifting mechanism 12. The flexible mounting vehicle for the landing gear testing equipment also includes a rotary drive mechanism 6 for driving the V-shaped gripper 4 to rotate along the arc groove 51. The flexible arm 7 is located at one end of the moving vehicle 1, and a counterweight 2 is located at the other end of the moving vehicle 1.

[0020] like Figure 2 , Figure 4 As shown, the translation drive mechanism 3 includes a cross slide 30 that provides driving force in the X-direction and Y-direction and a slewing bearing 320 that provides rotational driving force in the Z-direction. The cross slide 30 is mounted on the moving vehicle 1, the slewing bearing 320 is mounted on the cross slide 30, and the flexible arm 7 is mounted on the slewing bearing 320.

[0021] The cross slide 30 includes a navigation guide rail 31, a navigation slider 32, a first lead screw motor 33, a lateral guide rail 34, a lateral slider 35, a second lead screw motor 36, a lower platform 311, and an upper platform 312. The navigation guide rail 31 is mounted on the moving vehicle 1. The lower end of the lower platform 311 is provided with a navigation slider 32 connected to the navigation guide rail 31. The first lead screw motor 33 is used to drive the lower platform 311 to move along the navigation direction X.

[0022] The lateral guide rail 34 is mounted on the lower platform 311, and the lower end of the upper platform 312 is provided with a lateral slider 35 connected to the lateral guide rail 34. The second lead screw motor 36 is used to drive the upper platform 312 to move laterally in the Y direction. The slewing bearing 320 is mounted on the upper platform 312.

[0023] The slewing bearing 320 includes a gear ring 37 mounted on the upper platform 312 and a servo motor 39 mounted on the turntable plate 75 at the lower end of the flexible arm 7. The servo motor 39 is provided with a second drive gear 38 that meshes with the gear ring 37.

[0024] like Figure 5 , Figure 6 As shown, the rotary drive mechanism 6 includes an internal rack 61 disposed on the inner wall of the arc groove 51, a rotary motor 62 disposed on the V-shaped gripper 4, and a first drive gear 64 disposed on the motor shaft of the rotary motor 62 and meshing with the internal rack 61. The upper surface of the mounting base 5 is provided with an arc-shaped slide rail 63 adapted to the shape of the arc groove 51, and the lower surface of the base 45 of the V-shaped gripper 4 is provided with a second slider 65 connected to the arc-shaped slide rail 63.

[0025] The V-shaped gripper 4 includes a gripping block 41, a first lead screw 42, a first motor 43, a gripper slide rail 44, a base 45, and a first slider 46. The gripper slide rail 44, the first motor 43, and the first lead screw 42 are rotatably mounted on the side surface of the base 45. The first motor 43 is drivenly connected to the first lead screw 42. The gripping block 41 is threadedly connected to the first lead screw 42. There are two gripping blocks 41 arranged opposite each other. The first slider 46 is provided on the gripping block 41 and is slidably connected to the gripper slide rail 44.

[0026] The lifting mechanism 12 includes a second motor 121, a second lead screw 122, a bracket slide rail 123, and a third slider 124. The second motor 121 is mounted on the bracket 11, and the mounting base 5 is threadedly connected to the second lead screw 122. The second motor 121 and the second lead screw 122 are drivenly connected. The bracket 11 is provided with the bracket slide rail 123, and the mounting base 5 is provided with a third slider 124 connected to the bracket slide rail 123.

[0027] likeFigure 2 , Figure 3 As shown, the flexible arm 7 includes a lower adjusting arm 71, an upper adjusting arm 72, a first electric cylinder 73, a second electric cylinder 74, and a turntable plate 75. The turntable plate 75 is connected to the translation drive mechanism 3. The lower end of the lower adjusting arm 71 is hinged to the turntable plate 75, and the upper end of the lower adjusting arm 71 is hinged to the lower end of the upper adjusting arm 72. The upper end of the upper adjusting arm 72 is hinged to the swing cylinder 10. The first electric cylinder 73 is connected between the upper adjusting arm 72 and the lower adjusting arm 71, and the second electric cylinder 74 is connected between the lower adjusting arm 71 and the turntable plate 75.

[0028] The landing gear wheels are placed on the fixed block 16 and their position is adjusted by the rotating mechanism 17, while the struts are held by the V-shaped grippers 4. The cross slide 30 can achieve large-distance adjustments in heading and lateral direction. The slewing bearing 38 drives the flexible arm 7 to rotate. The extension and retraction of the first electric cylinder 73 and the second electric cylinder 74 can fine-tune the heading and vertical direction of the landing gear by driving the pitch of the lower adjusting arm 71 and the upper adjusting arm 72 respectively. The structure of the flexible arm 7 can solve the problem that the moving vehicle 1 cannot enter the semi-enclosed space, and plays a role in extending the heading. The swing cylinder 10 is an electric gear and rack structure, with one end connected to the upper adjusting arm 72 and the other end connected to the bracket 11 through the gear and rack. When the swing cylinder 10 rotates around its axis, the bracket 11 drives the entire workpiece to pitch, which can fine-tune the heading and vertical direction. The lifting mechanism 12 can drive the V-shaped grippers 4 to move up and down relative to the fixed frame 111 to adapt to landing gear products of different heights. The fixed block 16 is used to fix the landing gear tires and prevent slippage. The clamping block 41 can hold the landing gear strut by opening and closing, and can accommodate different diameters. Fine adjustments in various directions are achieved through various motors, enabling different attitude angles of the test equipment.

[0029] When the rotary motor 62 drives the first drive gear 64 to rotate, the second slider 64 is guided by the arc-shaped slide rail 63, and the first drive gear 64 rotates along the inner rack 61 to realize the rotation of the landing gear strut along the axis.

[0030] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A flexible mounting vehicle for landing gear testing equipment, characterized in that, The system includes a mobile vehicle (1), a translation drive mechanism (3), a flexible arm (7), a bracket (11), a lifting mechanism (12), a V-shaped gripper (4), a fixed block (16), and a rotating mechanism (17). The translation drive mechanism (3) is mounted on the mobile vehicle (1) and is used to drive the flexible arm (7) to rotate along the X-direction, Y-direction, and horizontal directions. The bracket (11) is mounted on the end of the flexible arm (7) via a swing cylinder (10). The lifting mechanism (12) is mounted on the bracket (11). The upper end of the bracket (11) is equipped with a V-shaped gripper (4) via the lifting mechanism (12). The lifting mechanism (12) is used to drive the V-shaped gripper (4) to move along the vertical Z-direction. The lower end of the bracket (11) is provided with a fixed frame (111). The fixed frame (111) is provided with a fixed block (16) for fixing the landing gear tires via the rotating mechanism (17).

2. The flexible mounting vehicle for landing gear testing equipment according to claim 1, characterized in that, The V-shaped gripper (4) is connected to the lifting mechanism (12) via the mounting base (5). The mounting base (5) has an arc groove (51) on the side away from the lifting mechanism (12). The flexible mounting vehicle for the landing gear test equipment also includes a rotary drive mechanism (6) for driving the V-shaped gripper (4) to rotate along the arc groove (51).

3. The flexible mounting vehicle for landing gear testing equipment according to claim 2, characterized in that, The rotary drive mechanism (6) includes an internal rack (61) on the inner wall of the arc groove (51), a rotary motor (62) on the V-shaped gripper (4), and a first drive gear (64) on the motor shaft of the rotary motor (62) and meshing with the internal rack (61). The upper surface of the mounting base (5) is provided with an arc-shaped slide rail (63) adapted to the shape of the arc groove (51), and the V-shaped gripper (4) is provided with a second slider (65) connected to the arc-shaped slide rail (63).

4. The flexible mounting vehicle for landing gear testing equipment according to claim 2, characterized in that, The V-shaped gripper (4) includes a gripper block (41), a first lead screw (42), a first motor (43), a gripper slide rail (44), a base (45), and a first slider (46). The base (45) is connected to the rotary drive mechanism (6). The side surface of the base (45) is provided with a gripper slide rail (44), a first motor (43), and a first lead screw (42) rotatably mounted. The first motor (43) is drivenly connected to the first lead screw (42). The gripper block (41) is threadedly connected to the first lead screw (42). There are two gripper blocks (41) arranged opposite each other. The gripper block (41) is provided with a first slider (46), which is slidably connected to the gripper slide rail (44).

5. The flexible mounting vehicle for landing gear testing equipment according to claim 2, characterized in that, The lifting mechanism (12) includes a second motor (121), a second lead screw (122), a bracket slide rail (123), and a third slider (124). The second motor (121) is mounted on the bracket (11), and the mounting base (5) is threadedly connected to the second lead screw (122). The second motor (121) is driven by the second lead screw (122). The bracket (11) is provided with the bracket slide rail (123), and the mounting base (5) is provided with a third slider (124) connected to the bracket slide rail (123).

6. The flexible mounting vehicle for landing gear testing equipment according to claim 1, characterized in that, The translation drive mechanism (3) includes a cross slide (30) that can provide driving force in the heading X and lateral Y directions and a slewing bearing (320) that can provide driving force in the rotation Z direction. The cross slide (30) is disposed on the moving vehicle (1), the slewing bearing (320) is mounted on the cross slide (30), and the flexible arm (7) is mounted on the slewing bearing (320).

7. The flexible mounting vehicle for landing gear testing equipment according to claim 6, characterized in that, The cross slide (30) includes a navigation guide rail (31), a navigation slider (32), a first lead screw motor (33), a lateral guide rail (34), a lateral slider (35), a second lead screw motor (36), a lower platform (311), and an upper platform (312). The navigation guide rail (31) is mounted on the moving vehicle (1). The lower end of the lower platform (311) is provided with a navigation slider (32) connected to the navigation guide rail (31). The first lead screw motor (33) is used to drive the lower platform (311) to move along the X direction. The lateral guide rail (34) is provided on the lower platform (311), and the lower end of the upper platform (312) is provided with a lateral slider (35) connected to the lateral guide rail (34). The second lead screw motor (36) is used to drive the upper platform (312) to move laterally in the Y direction. The slewing bearing (320) is provided on the upper platform (312).

8. The flexible mounting vehicle for landing gear testing equipment according to claim 6, characterized in that, The slewing bearing (320) includes a gear ring (37) mounted on a cross slide (30) and a servo motor (39) mounted on the lower end of the flexible arm (7). The servo motor (39) is provided with a second drive gear (38) that meshes with the gear ring (37).

9. The flexible mounting vehicle for landing gear testing equipment according to claim 1, characterized in that, The flexible arm (7) includes a lower adjusting arm (71), an upper adjusting arm (72), a first electric cylinder (73), a second electric cylinder (74), and a turntable plate (75). The turntable plate (75) is connected to the translation drive mechanism (3). The lower end of the lower adjusting arm (71) is hinged to the turntable plate (75). The upper end of the lower adjusting arm (71) is hinged to the lower end of the upper adjusting arm (72). The upper end of the upper adjusting arm (72) is hinged to the swing cylinder (10). The first electric cylinder (73) is connected between the upper adjusting arm (72) and the lower adjusting arm (71). The second electric cylinder (74) is connected between the lower adjusting arm (71) and the turntable plate (75).

10. The flexible mounting vehicle for landing gear testing equipment according to claim 1, characterized in that, The flexible arm (7) is located at one end of the mobile vehicle (1), and the other end of the mobile vehicle (1) is provided with a counterweight (2).

Images