Fixing device for action cylinder of nose landing gear

Abstract

The utility model provides a nose landing gear action cylinder fixing device. The nose landing gear action cylinder fixing device comprises a hoop, a connecting bolt, a mounting bolt, a support and a wheel shaft. The bracket is divided into a left part and a right part which are symmetrical; the tops of the left part and the right part of the bracket are movably connected with hoops through mounting bolts; the hoop can move left and right along the bracket; the clamping hoop is connected through a connecting bolt and is used for fixing a nose landing gear action cylinder of an airplane; the wheel shaft is movably installed at the bottom of the support and can move left and right along the support. A positioning bolt and a positioning nut which are used for fixing the bracket are arranged in the middle of the bracket; fixing pins are arranged at the left and right ends of the wheel shaft; the device is simple in structure, convenient and fast to install and easy to operate, the aircraft attitude is kept stable, the weighing test efficiency is improved, the test risk is reduced, the production progress is effectively guaranteed, and the test cost is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft front landing gear fixing devices, and in particular relates to a front landing gear action cylinder fixing device. Background Art

[0002] During the aircraft development and production process, the aircraft needs to be weighed to determine whether the weight center of gravity of the manufactured aircraft is consistent with the weight center of gravity of the designed aircraft. Only by ensuring that the weight center of gravity of the aircraft meets the design weight center requirements can the safe flight of the aircraft be guaranteed. Since the landing gear actuator is retractable, the aircraft attitude will change during the weighing process. The unstable state of the aircraft makes the horizontal state adjustment work more difficult, resulting in a long time for the horizontal adjustment of the aircraft, which seriously affects the efficiency of the weighing work. In the horizontal state of the aircraft, the wheels are parked on the pads and are higher than the ground. Since the aircraft landing gear actuator is retractable, the aircraft will shake when it is subjected to external force changes, which increases the risk of aircraft weighing. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide a front landing gear actuator cylinder fixing device which can keep the front landing gear actuator cylinder of the aircraft in a fully extended state and avoid changes in the aircraft posture during the weighing process.

[0004] The utility model is realized by the following technical solutions:

[0005] A front landing gear actuator fixing device comprises a clamp, a connecting bolt, a mounting bolt, a bracket and a wheel axle; the bracket is divided into two symmetrical left and right parts; the tops of the left and right parts of the bracket are movably connected with clamps through mounting bolts; the clamp can move left and right along the bracket; the clamps are connected by connecting bolts and are used to fix the front landing gear actuator of the aircraft; the wheel axle is movably installed at the bottom of the bracket and can move left and right along the bracket; a positioning bolt and a positioning nut for fixing the bracket are arranged in the middle of the bracket; and fixing pins are arranged at the left and right ends of the wheel axle.

[0006] Beneficial effects of the utility model:

[0007] The utility model has the advantages of simple structure, quick and convenient installation and easy operation, and can maintain the stability of the aircraft attitude, improve the weighing test efficiency, reduce the test risk, effectively ensure the production progress and reduce the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0009] Figure 1 It is a structural schematic diagram of the utility model.

[0010] Figure 2This is a working state diagram of the utility model. As shown in the figure: 1-clamp; 2-connecting bolt; 3-installing bolt; 4-bracket; 5-positioning bolt; 6-positioning nut; 7-wheel axle; 8-fixing pin; 9-front landing gear; 91-front landing gear actuator; 92-front wheel. DETAILED DESCRIPTION

[0011] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0012] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantial change of the technical content.

[0013] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. It should be noted that the terms "include", "comprise" or any other variants are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0014] like Figure 1 The front landing gear actuator fixing device shown comprises: a clamp 1, a connecting bolt 2, a mounting bolt 3, a bracket 4, a positioning bolt 5, a positioning nut 6, a wheel axle 7, and a fixing pin 8.

[0015] The bracket 4 is composed of two parts which are symmetrical with respect to the left and right.

[0016] The clamp 1 is movably mounted on the top of the left and right brackets 4 by means of mounting bolts 3 and can move left and right along the top of the bracket 4 to clamp the front landing gear actuator 91 and fix the clamped clamp 1 by means of the connecting bolts 2 mounted on the clamp 1.

[0017] The positioning bolt 5 and the positioning nut 6 are installed between the left and right brackets 4 to connect the two brackets 4.

[0018] The wheel axle 7 is movably mounted at the bottom of the bracket 4 and can move left and right along the bracket 4 . Fixing pins 8 are provided at both ends of the wheel axle 7 to prevent the wheel axle 7 from falling off the bracket 4 .

[0019] Working principle:

[0020] like Figure 2 As shown, when in use, the clamp 1 used to install the front landing gear actuator cylinder 91 is installed on the front landing gear actuator cylinder 91 and locked with the connecting bolt 2, the axle 7 passes through the wheel center of the front wheel 92, the fixing pin 8 is inserted into the left and right ends of the axle 7, and the left and right brackets 4 are fixed together with the positioning bolts 5 and the positioning nuts 6.

[0021] The protection scope of the present utility model is not limited to the technical solutions disclosed in the specific implementation methods. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A front landing gear actuator fixing device, characterized in that: The invention comprises a clamp (1), a connecting bolt (2), a mounting bolt (3), a bracket (4) and a wheel axle (7); the bracket (4) is divided into two symmetrical left and right parts; the tops of the left and right parts of the bracket (4) are both movably connected to the clamp (1) via the mounting bolt (3); the clamp (1) can move left and right along the bracket (4); the clamps (1) are connected via the connecting bolt (2) and are used to fix the front landing gear actuator of the aircraft; the wheel axle (7) is movably mounted on the bottom of the bracket (4) and can move left and right along the bracket (4).

2. A front landing gear actuator fixing device according to claim 1, characterized in that A positioning bolt (5) and a positioning nut (6) for fixing the bracket (4) are arranged in the middle of the bracket (4).

3. A front landing gear actuator fixing device according to claim 1, characterized in that The wheel axle (7) is provided with fixing pins (8) at both ends thereof.

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