Demonstration and maintenance rack for nose landing gear of airplane

Abstract

The utility model provides a demonstration and maintenance rack for a nose landing gear of an airplane. The demonstration and maintenance rack comprises a base, a rack main body, a lifting frame and a lifting mechanism, the rack main body is fixedly mounted on the base; the rack body comprises stand columns and a top frame. The top frame is fixedly connected to the tops of the stand columns. The lifting frame is mounted on the top frame through a lifting mechanism; a main beam is arranged in the middle of the lifting frame and provided with a main shaft seat rotationally connected with a force bearing supporting column of an aircraft nose landing gear. An auxiliary beam is arranged behind the main beam, and an auxiliary shaft seat rotationally connected with a retracting and releasing mechanism of the nose landing gear of the aircraft is arranged on the auxiliary beam; the lifting mechanism comprises a lifting lead screw, a transmission device, a guide rod, a guide sleeve, a synchronizing shaft and a turning hand wheel. The device can fix the nose landing gear for maintenance and demonstration.

Description

Technical Field

[0001] The utility model relates to the field of aviation maintenance equipment, in particular to a demonstration and maintenance platform for an aircraft nose landing gear. Background Art

[0002] Aircraft landing gear is used for landing and walking, and is an important part of the aircraft. Among them, the aircraft landing gear is divided into the front landing gear located at the nose and the main landing gear located on both sides.

[0003] The nose landing gear needs to be secured for routine maintenance. In maintenance workshops, during routine training for aircraft maintenance technicians, the nose landing gear also needs to be secured for display and demonstration. This requires a device that can secure the nose landing gear without obstructing maintenance and allowing for adequate movement. The prior art lacks a device specifically designed for securing the nose landing gear of an aircraft. Utility Model Content

[0004] The purpose of the utility model is to provide a demonstration and maintenance stand for the front landing gear of an aircraft, in order to solve the problems existing in the prior art, so as to fix the front landing gear for maintenance and demonstration.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A demonstration and maintenance stand for an aircraft nose landing gear comprises a base, a stand body, a lifting frame and a lifting mechanism; the stand body is fixedly mounted on the base; the stand body comprises a column and a top frame, the top frame being fixedly connected to the top of the column; the lifting frame is mounted on the top frame via the lifting mechanism;

[0007] A main beam is provided in the middle of the lifting frame, on which a main axle seat is provided for rotational connection with the load-bearing strut of the aircraft's front landing gear; a secondary beam is provided at the rear of the main beam, on which a secondary axle seat is provided for rotational connection with the retraction and extension mechanism of the aircraft's front landing gear;

[0008] The lifting mechanism includes a lifting screw, a transmission device, a guide rod, a guide sleeve, a synchronous shaft and a turning handwheel; each lifting screw is connected to a set of transmission devices, and the lifting screw and the transmission device are installed on the top frame, and the top end of the lifting screw is connected to the lifting frame; adjacent transmission devices are connected through synchronous shaft transmission; a guide rod is provided on the side of each lifting screw, and the top end of the guide rod is fixedly connected to the lifting frame, and each guide rod is slidably connected to a guide sleeve, which is fixedly installed on the top frame; one of the transmission devices is connected to a turning handwheel.

[0009] Furthermore, the lifting mechanism also includes a motor, which is fixedly mounted on the top frame and is in transmission connection with one of the transmission devices.

[0010] Furthermore, the lifting screw rod and the transmission device are arranged at the corners of the top frame, and the synchronization shaft extends along each side of the top frame.

[0011] Furthermore, it also includes a ramp for assisting the movement of the front landing gear of the aircraft; the ramp is fixed to the edge of the base and connected to the base.

[0012] Furthermore, it also includes a bottom universal wheel; the bottom universal wheel is installed under the base.

[0013] Furthermore, it also includes an adjusting foot, which is installed under the base and is threadedly connected to the base.

[0014] The utility model discloses a demonstration and maintenance platform for the front landing gear of an aircraft. The load-bearing pillar of the front landing gear is connected via a main shaft seat on the platform body, and a retracting and extending mechanism is connected via a secondary shaft seat. There is sufficient space around the platform for maintenance operations and for daily demonstration and teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic structural diagram of a demonstration and maintenance stand for a front landing gear of an aircraft provided in an embodiment of the present invention.

[0016] Figure 2 It is a structural diagram of the lifting mechanism in an embodiment of the present utility model. DETAILED DESCRIPTION

[0017] The technical solution of the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] like Figure 1 As shown, the present invention provides a demonstration and maintenance stand for the front landing gear of an aircraft, comprising a base 1, a stand body 2, a lifting frame 3 and a lifting mechanism 4; the stand body 2 is fixedly mounted on the base 1; the stand body 2 comprises a column 21 and a top frame 22, the top frame 22 is fixedly connected to the top of the column 21; the lifting frame 3 is mounted on the top frame 22 via the lifting mechanism 4.

[0020] A main beam 31 is provided in the middle of the lifting frame 3, and a main shaft seat 32 is provided on the main beam 31, which is rotatably connected to the load-bearing support of the aircraft's front landing gear; a secondary beam 33 is provided behind the main beam 31, and a secondary shaft seat 34 is provided on the secondary beam 33, which is rotatably connected to the retraction and extension mechanism of the aircraft's front landing gear.

[0021] like Figure 2As shown, the lifting mechanism 4 includes a lifting screw 41, a transmission device 42, a guide rod 43, a guide sleeve 44, a synchronization shaft 45 and a turning handwheel 46; each lifting screw 41 is transmission-connected to a set of transmission devices 42, and the lifting screw 41 and the transmission device 42 are installed on the top frame 22, and the top end of the lifting screw 41 is connected to the lifting frame 3; adjacent transmission devices 42 are transmission-connected via a synchronization shaft 45; a guide rod 43 is provided on the side of each lifting screw 41, and the top end of the guide rod 43 is fixedly connected to the lifting frame 3, and each guide rod 43 is slidably connected to a guide sleeve 44, which is fixedly installed on the top frame 22; one of the transmission devices 42 is transmission-connected to a turning handwheel 46.

[0022] The main body 2 of the gantry supports the load via columns 21, and the lifting frame 3 can be raised and lowered on the gantry 2 by the lifting mechanism 4. During use, the top of the load-bearing strut of the nose landing gear is mounted on the main axle seat 32, and the end of the retraction mechanism of the nose landing gear is mounted on the secondary axle seat 34. The nose landing gear is then hoisted onto the lifting frame 3. The frame structure of the main body 2 provides ample space, ensuring that routine maintenance and inspection of the main landing gear are not affected. The gantry also serves a demonstration and training purpose, allowing the main landing gear to be demonstrated, such as steering and retraction.

[0023] The lifting mechanism 4 utilizes a lifting screw 41 for lifting and lowering. Manually rotating the turning handwheel 46 instantly drives the lifting screw 41 through the transmission device 42, achieving the lifting motion. The transmission device 42 houses a gear train that reduces effort, increases torque, and changes transmission direction. Multiple transmission devices 42 are synchronized via a synchronizing shaft 45. Activating one transmission device 42 synchronizes all others, driving all the lifting screws 41 simultaneously and achieving the lifting motion of the entire lifting frame 3.

[0024] As a further preferred feature, the lifting mechanism 4 further includes a motor 47, which is fixedly mounted on the top frame 22 and is in driving connection with one of the transmission devices 42. When the motor 47 drives one of the transmission devices 42, all transmission devices 42 operate synchronously under the drive of the synchronization shaft 45. A single motor 47 can electrically drive the lifting frame 3.

[0025] Preferably, the lifting screw 41 and the transmission device 42 are arranged at the corners of the top frame 22, and the synchronization shaft 45 extends along each side of the top frame 22. This layout can better utilize space and the synchronization shaft 45 will not hinder daily inspection and maintenance operations or demonstration teaching.

[0026] In order to facilitate the assembly and disassembly and transportation of the aircraft main landing gear, preferably, a ramp 5 for assisting the movement of the aircraft front landing gear is also included; the ramp 5 is fixedly arranged on the edge of the base 1 and connected to the base 1. The aircraft front landing gear can be pushed onto the base 1 through the ramp 5.

[0027] In order to facilitate the overall transportation of the platform, preferably, it also includes a bottom universal wheel 6; the bottom universal wheel 6 is installed under the base 1. In conjunction with it, it also includes an adjustment foot 7, which is installed under the base 1 and is threadedly connected to the base 1.

[0028] The universal wheels 6 at the bottom allow the stand to be moved along with the aircraft's nose landing gear. The stand's position can be freely adjusted during use, facilitating both demonstrations and routine maintenance and inspections. Once positioned correctly, the adjustable feet 7 can be rotated and extended to support the ground, securing the stand's position. Both the universal wheels 6 and the adjustable feet 7 are concealed by the base 1 and ramp 5, remaining hidden from view and preventing interference with routine maintenance.

[0029] The aircraft nose landing gear demonstration and maintenance stand of this utility model has a simple structure and provides lifting functions. The lifting mechanism 4 is linked via a synchronous shaft 45, and a single turning handwheel 46 or motor 47 controls the synchronous movement of all lifting screws 41. The layout is rational, and ample space within the stand body 2 facilitates routine inspection, maintenance, and demonstrations. Universal wheels 6 at the bottom allow for easy movement.

[0030] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A demonstration and maintenance stand for aircraft nose landing gear, characterized by: It includes a base, a stand body, a lifting frame and a lifting mechanism; the stand body is fixedly installed on the base; the stand body includes a column and a top frame, and the top frame is fixedly connected to the top of the column; the lifting frame is installed on the top frame through the lifting mechanism; A main beam is provided in the middle of the lifting frame, on which a main axle seat is provided for rotational connection with the load-bearing strut of the aircraft's front landing gear; a secondary beam is provided at the rear of the main beam, on which a secondary axle seat is provided for rotational connection with the retraction and extension mechanism of the aircraft's front landing gear; The lifting mechanism includes a lifting screw, a transmission device, a guide rod, a guide sleeve, a synchronous shaft and a turning handwheel; each lifting screw is connected to a set of transmission devices, and the lifting screw and the transmission device are installed on the top frame, and the top end of the lifting screw is connected to the lifting frame; adjacent transmission devices are connected through synchronous shaft transmission; a guide rod is provided on the side of each lifting screw, and the top end of the guide rod is fixedly connected to the lifting frame, and each guide rod is slidably connected to a guide sleeve, which is fixedly installed on the top frame; one of the transmission devices is connected to a turning handwheel.

2. The aircraft nose landing gear demonstration and maintenance stand according to claim 1, characterized in that: The lifting mechanism also includes a motor, which is fixedly mounted on the top frame and is in transmission connection with one of the transmission devices.

3. The aircraft nose landing gear demonstration and maintenance stand according to claim 1 or 2, characterized in that: The lifting screw rod and the transmission device are arranged at the corners of the top frame, and the synchronization shaft extends along each side of the top frame.

4. The aircraft nose landing gear demonstration and maintenance stand according to claim 1 or 2, characterized in that: It also includes a ramp for assisting the movement of the front landing gear of the aircraft; the ramp is fixedly arranged on the edge of the base and connected with the base.

5. The aircraft nose landing gear demonstration and maintenance stand according to claim 1 or 2, characterized in that: The utility model also comprises a bottom universal wheel; the bottom universal wheel is installed under the base.

6. The aircraft nose landing gear demonstration and maintenance stand according to claim 5, characterized in that: It also includes an adjusting foot, which is installed under the base and is threadedly connected to the base.

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