A landing gear mounting tool for a lift space

Abstract

The application belongs to the field of aeronautical structure dynamics test, and particularly relates to a landing gear mounting tool for no lifting space, a base (1), a rotary support device (3) and a mounting frame; a plurality of omnidirectional wheels for support are mounted on the lower end surface of the base (1), the rotary support device (3) is mounted on the upper end surface of the base (1), the mounting frame is fixed above the rotary support device (3), the mounting frame has a rotary freedom degree relative to the base (1), and the rotary positioning device between the base (1) and the mounting frame limits the rotary freedom degree of the mounting frame. The application can freely adjust the X\Y direction position, and can rotate around the Z axis to align the mounting hole position.

Description

Technical Field

[0001] This application belongs to the field of aerospace structural dynamics testing, and specifically relates to a landing gear installation fixture for use in areas without lifting space. Background Technology

[0002] Landing gear is an essential component of an aircraft's takeoff and landing system, and it is a critical part of ensuring safe takeoff and landing. Its structural performance is an important indicator of the overall performance of an aircraft.

[0003] When conducting landing gear tests, the landing gear and tooling need to be installed under the test bench. However, some test benches were not designed with hoisting in mind and do not have space reserved for hoisting at the top. The current solution is to use a transition plate with two lugs and lift the lugs with a hydraulic forklift. This method is difficult to fine-tune near the target position and has poor movement and control performance. Summary of the Invention

[0004] To address the aforementioned problems, this application provides a landing gear installation fixture for applications without lifting space, comprising:

[0005] The base consists of a base, a slewing support device, and a mounting frame. The lower end of the base is equipped with multiple omnidirectional wheels for support, and the upper end is equipped with a slewing support device. The mounting frame is fixed above the slewing support device, giving the mounting frame a degree of freedom of rotation relative to the base. A slewing positioning device is also provided between the base and the mounting frame to restrict the degree of freedom of rotation of the mounting frame.

[0006] Preferably, the mounting frame includes a welded frame and a detachable frame. The welded frame is a box-shaped structure formed by welding multiple frame strips, and one side of it is fixed by a threaded connection to the detachable frame.

[0007] Preferably, the rotary positioning device includes: a fixing nut fixed on the base and a lifting bolt installed in the fixing nut, wherein the lifting bolt is raised to contact and limit the bottom of the mounting frame.

[0008] Preferably, the bottom of the frame has a protrusion, and the top of the lifting bolt has a groove that mates with the protrusion.

[0009] Preferably, the bottom of the frame has a groove into which the lifting bolt is raised and inserted.

[0010] Preferably, the fixing nuts and lifting bolts are distributed at the four corners of the base.

[0011] The advantages of this application include:

[0012] a) This auxiliary installation tooling can install the landing gear and its installation tooling in locations where lifting is not possible;

[0013] b) The X and Y positions can be freely adjusted, and the Z-axis can be rotated to align with the mounting holes;

[0014] c) The frame size and slewing bearing size can be changed according to different landing gear sizes, making it highly versatile;

[0015] d) The structure is simple and convenient to design and has a low cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation fixture according to a preferred embodiment of this application.

[0017] Figure 2 This is a schematic diagram of the installation fixture according to a preferred embodiment of this application.

[0018] Figure 3 This is an auxiliary support model diagram.

[0019] Figure 4 This is a diagram of the auxiliary support principle model. Detailed Implementation

[0020] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings. Other related parts can be referred to the general design. In the absence of conflict, the embodiments and technical features in the embodiments of this application can be combined with each other to obtain new embodiments.

[0021] like Figures 1-4 As shown, this application provides a landing gear installation fixture for use in spaces without lifting capacity, comprising:

[0022] The system comprises a base 1, a slewing support device 3, and a mounting frame. The lower end of the base 1 is equipped with multiple omnidirectional wheels for support, and the upper end is fitted with the slewing support device 3. The mounting frame is fixed above the slewing support device 3, allowing the mounting frame to rotate relative to the base 1. A slewing positioning device is also provided between the base 1 and the mounting frame to restrict the rotational freedom of the mounting frame. The slewing positioning device provides support during movement to ensure stability and prevent tipping, and removes support when adjusting the angle. This device is simple to operate and provides a solution for installations without lifting space, thus possessing practical significance.

[0023] Preferably, the mounting frame includes a welded frame 5 and a detachable frame 4. The welded frame 5 is a box-shaped structure formed by welding multiple frame strips, and one side of it is fixed by a threaded connection to the detachable frame 4. The slewing support device 3 is prior art and consists of two rotating bodies connected by bearings.

[0024] Preferably, the rotary positioning device includes: a fixing nut 11 fixed on the base 1 and a lifting bolt 12 installed in the fixing nut 11, wherein the lifting bolt 12 is raised to contact and limit the bottom of the mounting frame.

[0025] Preferably, the frame has a protrusion at the bottom, and the top of the lifting bolt 12 has a groove that mates with the protrusion. This device provides auxiliary support during frame movement, ensuring frame stability. The top of the lifting nut has a pre-made groove for aligning with the protrusion at the bottom of the frame, ensuring that the frame does not rotate during movement. After reaching the installation position, the lifting nut can be unscrewed to adjust the frame rotation and align it with the mounting holes.

[0026] Preferably, the bottom of the frame has a groove into which the lifting bolt 12 is raised and inserted.

[0027] Preferably, the fixing nut 11 and the lifting bolt 12 are distributed at the four corners of the base 1.

[0028] Its installation process is as follows Figure 2 As shown, 1. Assemble the installation fixture and landing gear fastening fixture on the ground; 2. Push the fixture to the installation position; 3. Use a slewing bearing to adjust the angle and align the mounting holes; 4. Use a forklift to lift the landing gear to a small height and install it onto the test bench; 5. Lower the fixture and remove the removable frame of the installation fixture; 6. Remove the fixture frame to complete the installation.

[0029] The advantages of this application include:

[0030] a) This auxiliary installation tooling can install the landing gear and its installation tooling in locations where lifting is not possible;

[0031] b) The X and Y positions can be freely adjusted, and the Z-axis can be rotated to align with the mounting holes;

[0032] c) The frame size and slewing bearing size can be changed according to different landing gear sizes, making it highly versatile;

[0033] d) The structure is simple and convenient to design and has a low cost.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A landing gear installation fixture for use in spaces without hoisting capacity, characterized in that, include: The base (1), the slewing support device (3), and the mounting frame are provided. The lower end face of the base (1) is equipped with multiple omnidirectional wheels for support, and the upper end face is equipped with the slewing support device (3). The mounting frame is fixed above the slewing support device (3) so that the mounting frame has a degree of freedom of rotation relative to the base (1). There is also a slewing positioning device between the base (1) and the mounting frame to limit the degree of freedom of rotation of the mounting frame.

2. The landing gear installation fixture for use in spaces without hoisting space as described in claim 1, characterized in that, The mounting frame includes a welded frame (5) and a detachable frame (4). The welded frame (5) is a box-shaped structure formed by welding multiple frame strips, and one side of it is fixed by the detachable frame (4) by threaded connection.

3. The landing gear installation fixture for use in spaces without hoisting space as described in claim 1, characterized in that, The rotary positioning device includes a fixing nut (11) fixed on the base (1) and a lifting bolt (12) installed in the fixing nut (11). The lifting bolt (12) rises and contacts the bottom of the mounting frame for a limit stop.

4. The landing gear installation fixture for use in spaces without hoisting requirements as described in claim 3, characterized in that, The bottom of the frame has a protrusion, and the top of the lifting bolt (12) has a groove that mates with the protrusion.

5. The landing gear installation fixture for use in spaces without hoisting space as described in claim 3, characterized in that, The bottom of the frame has a groove, and the lifting bolt (12) is raised and inserted into the groove.

6. The landing gear installation fixture for use in spaces without hoisting requirements as described in claim 3, characterized in that, The fixing nuts (11) and lifting bolts (12) are distributed at the four corners of the base (1).

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