CN110002335A - A kind of adjustable vertical lifting device of aircraft nose landing gear - Google Patents

Abstract

The invention discloses an adjustable vertical hoisting device for the front landing gear of an aircraft, which comprises a lower hanger, a lower connecting pin, an upper hanger, an upper connecting pin, an adjusting pin and a limit pin, and the lower hanger is provided with two guide rods. The upper ends of the two guide rods are respectively provided with guide parts, and a first limit hole is opened on the guide parts, a lower connecting rod is arranged behind the two guide rods, and a lower perforation is arranged at the rear end of the two lower connecting rods; The pin shaft is inserted into the lower hole; the upper end of the upper hanger is provided with two balance adjustment plates, the lower end is provided with two sleeves, a plurality of center of gravity adjustment holes are opened on the two balance adjustment plates, and the two guide parts are correspondingly inserted in the two sleeves , a second limit hole is arranged on the sleeve, upper connecting rods are respectively arranged behind the two sleeves, and upper perforations are respectively arranged at the rear ends of the two upper connecting rods; the upper connecting pin is inserted into the upper through holes; The adjustment pin is inserted into the center of gravity adjustment hole; the limit pin is used for insertion into the first limit hole and the second limit hole. The invention can realize the vertical hoisting of the front landing gear of the aircraft.

Description

An adjustable vertical hoisting device for the nose landing gear of an aircraft

technical field

The invention relates to an adjustable vertical hoisting device for the nose landing gear of an aircraft.

Background technique

At present, the domestic reference tools for aircraft maintenance are provided by foreign aircraft manufacturers, but for some maintenance solutions, it is difficult to operate in actual production, and only strict working parameter requirements are given, without mentioning the required Tooling equipment. For example, when the aircraft landing gear is overhauled or the overall hoisting installation is performed, the assembly requirements for the outer cylinder of the front landing gear are vertical assembly, and there are multiple rubber seal rings between the bearings between the inner and outer cylinders. Standard, otherwise friction and collision will occur, damage the sealing ring or the surface treatment layer of each part, and affect the product quality. Due to the complex structure of the outer cylinder of the landing gear and the asymmetric mass distribution, the vertical hoisting cannot be guaranteed simply by passing the sling through the journal hole of the nose gear, or the upper and lower lugs on the outer side wall of the outer cylinder of the nose gear.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an adjustable vertical hoisting device for the nose landing gear of an aircraft, which can realize the vertical hoisting of the nose landing gear of the aircraft.

To solve the above-mentioned technical problems, the technical scheme adopted in the present invention is as follows:

An adjustable vertical hoisting device for the nose landing gear of an aircraft, characterized in that it comprises:

The lower hanger is provided with two guide rods, the left and right of the two guide rods are correspondingly fixedly connected, the upper ends of the two guide rods are respectively provided with vertically upward guide parts, and a plurality of first limit holes are opened on the guide parts, and a plurality of first limit holes are opened on the guide parts. The limit holes are arranged vertically, and lower connecting rods extending horizontally and backward are respectively arranged behind the two guide rods, the two lower connecting rods correspond to the left and right, and the rear ends of the two lower connecting rods are respectively provided with lower perforations;

The lower connecting pin is inserted into the lower hole for connecting with the lower connecting ear on the outer side wall of the outer cylinder of the nose landing gear;

The upper hanger is provided with two horizontal and backward balance adjustment plates at the upper end and two vertical downward sleeves at the lower end. When the nose landing gear is hoisted, the balance adjustment plate is located directly above the nose landing gear, and the two balance adjustment plates correspond to the left and right. A plurality of center of gravity adjustment holes are correspondingly opened on the two balance adjustment plates. The center of gravity adjustment holes are arranged along the length direction of the balance adjustment plate. There is a second limit hole, an upper link extending horizontally and backward is respectively arranged behind the two sleeves, the two upper links correspond left and right, and upper perforations are respectively arranged at the rear ends of the two upper links;

The upper connecting pin is inserted into the upper through hole and used to connect with the upper connecting ear on the outer side wall of the outer cylinder of the nose landing gear;

The adjusting pin is inserted into the center of gravity adjusting hole;

The limit pin is used to be inserted into the first limit hole and the second limit hole, so as to connect the sleeve and the guide part.

Two sets of second limit holes are respectively arranged on the two sleeves, and the two sets of second limit holes are arranged vertically, and the interval between them is equal to the interval between two adjacent first limit holes. Limit pins are inserted into the second limit holes of the group.

The two guide rods are fixedly connected by a beam.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention makes full use of the structure on the front landing gear, is directly connected with the ears on the outer side wall of the front landing gear outer cylinder, and then selects the center of gravity adjustment hole and adjusts the relative position between the lower hanger and the upper hanger. It can meet the vertical hoisting work under various load distribution conditions. This set of equipment has strong compatibility, convenient operation and high reliability. It provides important tooling support for the assembly and production of the nose landing gear of various types of aircraft.

The present invention mainly solves the problem of vertical hoisting control in the process of disassembling and assembling the inner and outer barrels of the front landing gear of the Airbus A320 series aircraft and the entire front landing gear assembly hoisting process, and is mainly applied to the front landing gear of the Airbus A320 series and Boeing 737 series. During the in-depth repair of the landing gear and the overall installation of the components. The present invention can realize the vertical hoisting of the outer cylinder of the front landing gear or the vertical hoisting of the entire front landing gear through the selection of hoisting points at different positions according to the actual weight distribution during hoisting. The invention can be compatible with the assembly and test work of the nose landing gear of different types of aircraft, and is reliable and convenient to use.

Description of drawings

Fig. 1 is the three-dimensional schematic diagram of the present invention;

Fig. 2 is the structure schematic diagram of the existing aircraft nose landing gear;

FIG. 3 is a schematic diagram of the present invention when the nose landing gear of the aircraft is hoisted.

The meaning of the reference symbols in the figure:

1-upper hanger; 11-balance adjustment plate; 12-upper link; 13-sleeve; 14-second limit hole; 15-gravity adjustment hole; 2-lower hanger; 21-guide rod; 22-down connecting rod; 23-beam; 24-guide part; 25-first limit hole; 3-upper connecting pin; 4-lower connecting pin; 5-adjusting pin; 6-limiting pin; 100-outer cylinder; 101-connected to the lower ear; 102-connected to the upper ear.

Detailed ways

The present invention will be further described below in conjunction with the embodiments.

As shown in FIG. 1 , an adjustable vertical hoisting device for the nose landing gear of an aircraft includes a lower pylon 2 , a lower connecting pin 4 , an upper pylon 1 , an upper connecting pin 3 , an adjusting pin 5 and a limit pin 6 . FIG. 2 is a schematic structural diagram of an existing aircraft nose landing gear, which includes an outer tube 100, and an upper ear 102 and a lower ear 101 are provided on the outer side wall of the outer tube.

The lower hanger 2 is provided with two guide rods 21, the left and right of the two guide rods are correspondingly fixedly connected, and the upper ends of the two guide rods 21 are respectively provided with vertically upward guide parts 24, the guide parts 24 are corresponding to the left and right, and the guide parts 24 are opened with A plurality of first limit holes 25 are arranged vertically. In this embodiment, there are four first limit holes 25, and behind the two guide rods 21 are respectively provided with horizontal and backward extending holes. The lower connecting rods 22, the two lower connecting rods 22 correspond left and right, the rear ends of the two lower connecting rods 22 are respectively provided with lower through holes, and the lower through holes at the rear ends of the two lower connecting rods 22 correspond left and right. The lower connecting pin shaft 4 is inserted into the lower through hole for connecting with the lower connecting lug 101 on the outer side wall of the outer cylinder of the nose landing gear.

The upper end of the upper hanger 1 is provided with two horizontally backward balance adjustment plates 11. When the nose landing gear is hoisted, the balance adjustment plate 11 is located directly above the nose landing gear. A plurality of center of gravity adjustment holes 15 are correspondingly opened on the adjustment plate 11. In this embodiment, each of the balance adjustment plates 11 is provided with four center of gravity adjustment holes 15. The center of gravity adjustment holes 15 are arranged along the length direction of the balance adjustment plate 11. The lower end of the 1 is provided with two vertically downward sleeves 13, the two sleeves 13 correspond left and right, the two guide portions 24 are correspondingly inserted in the two sleeves 13, and the sleeve 13 is provided with a first limit hole 25 corresponding to the first limit hole 25. Two limit holes 14 . The upper links 12 extending horizontally and backward are respectively provided behind the two sleeves 13. The two upper links 12 correspond left and right. The rear ends of the two upper links 12 are respectively provided with upper perforations. The upper perforation corresponds to the left and right. The upper connecting pin shaft 3 is inserted into the upper through hole for connecting with the upper connecting ear 102 on the outer side wall of the outer cylinder of the nose landing gear.

The adjustment pin 5 is inserted into the center of gravity adjustment hole 15 for connection with the lifting component of the external crane, and the limit pin 6 is used to penetrate into the first limit hole 25 and the second limit hole 14, on the left and right sides. The limiting pins 6 are respectively passed through the sleeves 13 of the two parts, so as to connect the sleeves 13 and the guide parts 24 .

When using, first pull out the limit pin 6, and adjust the position between the upper hanger 1 and the lower hanger 2 up and down, so that the upper connecting pin 3 and the lower connecting pin 4 are respectively connected to the upper The lugs 102 correspond to the lower lugs 101, and then re-insert the limit pins 6 to lock the upper hanger 1 and the lower hanger 2 with each other, and adjust the position of the vertical hoisting device so that the upper lugs on the outer side wall of the outer cylinder of the nose landing gear are 102 is located between the two upper connecting rods 12, the lower lugs 101 on the outer side wall of the front landing gear outer cylinder are located between the two lower connecting rods 22, and the upper connecting pins 3 are used to pass through the upper through holes and the upper lugs 102 in turn. The upper connecting lug 102 of the outer cylinder of the nose landing gear is connected with the upper connecting rod 12, and the lower connecting pin 4 is used to pass through the lower hole and the installation hole on the lower connecting lug 101 in turn, so as to connect the outer cylinder of the nose landing gear to the upper connecting rod 12. The lower ear 101 is connected with the lower link 22, and the connecting hole on the lifting part of the external hoist corresponds to a set of center of gravity adjustment holes 15, and the adjusting pin 5 is passed through the connecting hole and The center of gravity adjustment holes 15 corresponding to the two balance adjustment plates are connected to the external lifting components of the hoist and the two balance adjustment plates 11 . When lifting, if the nose landing gear of the aircraft is not vertical, you can lower the nose landing gear of the aircraft, adjust the adjustment pin 5, select other center of gravity adjustment holes 15, connect the adjustment pin 5 with other center of gravity adjustment holes 15, and finally adjust to the front of the aircraft. The landing gear is vertical. Through the cooperation of the sleeve 13 and the guide portion 24, the vertical hoisting device can be adapted to the nose landing gear of different types of aircraft. Various aircraft nose landing gear designs. The vertical hoisting device can be used to hoist only the outer cylinder 100 of the nose landing gear of the aircraft, or directly hoist the entire nose landing gear of the aircraft.

In this embodiment, two sets of second limiting holes 14 are respectively provided on the two sleeves 13 . The two sets of second limiting holes 14 are arranged vertically, and the interval between them is the same as the distance between two adjacent first limiting holes 25 . The intervals are equal, and the limiting pins 6 are inserted into the two sets of second limiting holes 14 .

The two guide rods 21 in this embodiment are fixedly connected by a beam 23 .

The above-mentioned embodiments of the present invention are not intended to limit the scope of protection of the present invention, and the embodiments of the present invention are not limited thereto. According to the above-mentioned contents of the present invention, according to common technical knowledge and conventional means in the field, without departing from the present invention Under the premise of the above basic technical idea, other various modifications, replacements or changes made to the above structure of the present invention should all fall within the protection scope of the present invention.

Claims (3)

1. an adjustable vertical hoisting device for the nose landing gear of an aircraft, is characterized in that, comprises: The lower hanger is provided with two guide rods, the two guide rods are fixedly connected to the left and right, the upper ends of the two guide rods are respectively provided with vertically upward guide parts, and a plurality of first limit positions are opened on the guide parts A plurality of the first limit holes are arranged vertically, and lower connecting rods extending horizontally and backward are respectively arranged behind the two guide rods, and the two lower connecting rods correspond to the left and right, and are connected to the two lower connecting rods. The rear ends of the rods are respectively provided with lower perforations; The lower connecting pin is inserted into the lower through hole, and is used for connecting with the lower connecting ear on the outer side wall of the outer cylinder of the front landing gear; The upper hanger is provided with two horizontally backward balance adjustment plates at the upper end and two vertically downward sleeves at the lower end. When the nose landing gear is hoisted, the balance adjustment plate is located directly above the nose The plates correspond to the left and right, a plurality of center of gravity adjustment holes are correspondingly opened on the two balance adjustment plates, the center of gravity adjustment holes are arranged along the length direction of the balance adjustment plates, and the two guide parts are correspondingly inserted in the two sleeves. In the pipe, a second limit hole is provided on the sleeve corresponding to the first limit hole, and an upper connecting rod extending horizontally backward is respectively arranged behind the two sleeves, and the two upper connecting rods are connected to each other. The rods correspond to the left and right, and upper perforations are respectively provided at the rear ends of the two upper connecting rods; The upper connecting pin is inserted into the upper through hole and used for connecting with the upper connecting ear on the outer side wall of the outer cylinder of the nose landing gear; an adjustment pin, which is passed through the center of gravity adjustment hole; A limit pin is used to be inserted into the first limit hole and the second limit hole, so as to connect the sleeve and the guide portion. 2. The adjustable vertical hoisting device for the nose landing gear of an aircraft according to claim 1, wherein two sets of second limit holes are respectively provided on the two sleeves, and the two sets of the second limit holes They are arranged vertically, and the interval between them is equal to the interval between the two adjacent first limiting holes, and the limiting pins are inserted through the two sets of the second limiting holes. 3 . The adjustable vertical hoisting device for the nose landing gear of an aircraft according to claim 1 , wherein the two guide rods are fixedly connected by a beam. 4 .