Aircraft parts unlocking stroke measuring device and method

Abstract

The present invention belongs to the field of mechanical debugging and measurement of aircraft emergency life-saving systems, and proposes an aircraft parts unlocking stroke measuring device and method. The aircraft parts unlocking stroke measuring device includes a clamping mechanism, a fixed base mechanism and a driving mechanism; the scale lines of the scale rod of the present invention cooperate with the scale pointer structure of the mobile bracket to realize fast and intuitive reading operation; the quick-release clamping is adopted to reduce the installation and disassembly time and improve the efficiency of the unlocking stroke inspection work. The clamping mechanism is composed of a quick-release bolt, a rotating nut and a slotted structure of a left fixing frame and a right fixing frame. The front wheel angle ruler can be removed by loosening the quick-release bolt. Compared with the previous method of tightening screws, the number of tool reworks is reduced. Each part of the device can be easily installed in the part measurement area, reducing the difficulty of installation and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the field of mechanical debugging and measurement of an aircraft emergency life-saving system, and in particular to a device and method for measuring the unlocking stroke of aircraft parts. Background Art

[0002] When the aircraft is flying in the air, the pilot is in the cockpit, which is a relatively closed environment. When a special situation occurs and the pilot needs to parachute, the cockpit life-saving system works to eject the pilot from the cockpit and enable the pilot to leave the aircraft. Therefore, during the aircraft commissioning process, the cockpit life-saving system inspection is indispensable.

[0003] During the inspection of the aircraft life-saving system, the installation of related finished products and functional accessories, as well as the precise debugging and measurement of performance indicators are involved. When measuring the unlocking stroke of aircraft parts, the stroke measurement tool plays an irreplaceable role. The disassembly, assembly, use and measurement effect of the measuring tool directly affect the efficiency of the cockpit life-saving system inspection work and product quality.

[0004] At present, in the inspection of aircraft parts unlocking stroke, the stroke index given in the measurement technical conditions mainly relies on the mechanical structure of the parts themselves, and then uses relevant measuring equipment, combined with the motion characteristics and dimensional data parameters of the parts, to perform formula calculations, and finally obtain the required stroke data. Although this method can also complete this work well, it takes a long time and a lot of work to convert the measured data before obtaining the results. Summary of the invention

[0005] In view of the above reasons, an aircraft parts unlocking stroke measuring device and method are invented. The aircraft parts unlocking stroke measuring device is mainly used to efficiently complete the accurate measurement and inspection of the unlocking stroke of the cabin life-saving system parts. It is compatible with the mechanical structure of the system, easy to install and disassemble, and the scale reading is more convenient and intuitive. Under the premise of simplifying the measurement method, it reduces the difficulty of operation, improves work efficiency, and ensures the accuracy of the measurement data. The device in the present invention can directly reflect the real-time distance of the part movement, which can not only improve the measurement efficiency, but also ensure the product quality.

[0006] The technical solution of the present invention is: an aircraft part unlocking stroke measuring device, comprising a clamping mechanism, a fixed base mechanism and a driving mechanism; the left fixing frame 1 and the right fixing frame 2 are both semicircular, and the two are connected by a rotating pin 16 to form a clamping mechanism, which is used to clamp the aircraft part unlocking stroke measuring tool to the surface of the part shell, plays the role of fixing the overall measuring tool, and then locked by a quick-release bolt 3 and a rotating nut 4;

[0007] The fixed base mechanism includes a lower stop base 5, a lead screw 8, a driven gear 9, an upper stop base 10, a scale rod 12 and a light rod 13, which play the role of connecting the moving assembly and the driving mechanism, and are in direct contact with the left fixed frame 1 and the right fixed frame 2, ensuring the fixity during work; the end of the clamping mechanism is connected to the lower stop base 5; two lead screws 8, a scale rod 12 and a light rod 13 are installed between the lower stop base 5 and the upper stop base 10; the moving bracket 6 is threadedly connected to the two lead screws 8 for reciprocating motion, thereby driving the parts to realize the unlocking action, and there are long strip grooves on it, which can realize the installation of the measuring tool without disassembling the aircraft parts, thereby improving the work efficiency. A driven gear 9 is installed on each lead screw 8; a scale pointer is provided on the moving bracket 6, which cooperates with the scale rod 12 to obtain the scale.

[0008] The driving mechanism includes a rotating handle 11 , a rotating shaft 14 and a main gear 15 , which are connected in sequence; the rotating shaft 14 passes through a through hole of the upper stop base 10 , and the main gear 15 is meshed with each driven gear 9 .

[0009] The mounting points of the two lead screws 8 are respectively located at one diameter end point of the two bases, and the upper and lower ends of the lead screw 8 are nested in the circular grooves of the lower stop base 5 and the upper stop base 10 to ensure that they will not rotate eccentrically; the mounting points of the scale rod 12 and the smooth rod 13 are respectively located at the other diameter end points of the two bases, and the two diameters are perpendicular to each other.

[0010] Because the movable bracket 6 is in direct contact with the parts and transmits torque, a felt pad 7 is attached to its contact surface to protect the surface of the parts and avoid mechanical damage.

[0011] The quick-release bolt 3 is a cylinder with a slotted notch on its head and embossed on the side cylindrical surface to increase friction, allowing the operator to use a slotted screwdriver or complete the tightening work manually. The quick-release bolt 3 and the rotating nut 4 constitute a quick-release mechanism.

[0012] The travel of the part is read by the scale lines on the scale rod 12 and the scale pointer on the movable bracket 6, such as Figure 3 shown.

[0013] The working principle of the driving mechanism is to rotate the handle 11 to transmit the rotational motion to the screw 8 through the main gear 15 on the rotating shaft 14 in cooperation with the driven gear 9, and the screw 8 and the moving bracket 6 are threadedly connected, so that the motion form is converted from rotation around the axis to linear motion. The moving bracket 6 contacts the moving part of the part to realize the simulation of the unlocking motion of the part.

[0014] A method for measuring the unlocking stroke of aircraft parts comprises the following steps:

[0015] 1) Loosen the quick-release bolt 3, rotate the left fixing frame 1 and the right fixing frame 2, and open the clamping area of ​​the part unlocking stroke measuring device; first move the right fixing frame 2 close to the cylindrical surface to be installed, rotate it along the cylindrical surface, and move the left fixing frame 1 to the desired position; fix the quick-release bolt 3;

[0016] 2) Install the lower stop base 5 with the moving bracket 6, the felt pad 7, the lead screw 8 and the rotating handle 11 onto the aircraft part from one side, and rotate the rotating handle 11 to adjust the position of the moving bracket 6 so that it is below the moving end of the part and has a certain gap with the part;

[0017] 3) Perform pre-tightening work before inspection. First, turn the rotating handle 11 counterclockwise to make the moving bracket 6 slowly approach the moving end of the part. Stop rotating the rotating handle 11 until the two are in contact.

[0018] 4) Check the unlocking stroke of the part. First, read the current position data Amm through the scale lines engraved on the scale rod 12 and the scale pointer on the movable bracket 6. Then rotate the rotating handle 11 counterclockwise. The movable bracket 6 drives the moving end of the part to move until the unlocking moment. Stop rotating the rotating handle 11. At this time, read the scale data Bmm. At this time, the unlocking stroke C of the part is B-Amm.

[0019] Beneficial effects of the present invention:

[0020] (1) The present invention has a novel structure and is easy to install. The stroke measurement tool is divided into two parts, namely, the clamping and fixing part and the motion measurement part. Each part can be easily installed in the part measurement area, which reduces the difficulty of installation and improves work efficiency. In addition, because its overall size is designed to be small and its structural shape is adapted to the structure of the measured part, it can ensure the gap with the surrounding motion mechanism during the measurement process, avoid damaging the surrounding structure and causing unnecessary losses.

[0021] (2) The scale lines on the scale rod 12 of the present invention cooperate with the scale pointer structure on the movable bracket 6 to realize fast and intuitive reading operation. Because the scale is drawn by an engraving method, the scale lines and reference values ​​are engraved on the structure using a laser machine or other equipment. The scale is clear and has a clear contrast with the background color of the scale lines, making it easier to read. Compared with traditional printed scale lines, it can effectively prevent the phenomenon of blurred or missing markings caused by wear during long-term use.

[0022] (3) The present invention adopts a quick-release clamping method to reduce the time for installing and disassembling the angle ruler and improve the efficiency of the unlocking stroke inspection work. The clamping mechanism is composed of a quick-release bolt 3, a rotating nut 4 and corresponding slotted structures on the left fixing frame 1 and the right fixing frame 2. The front wheel angle ruler can be removed by loosening the quick-release bolt 3. Compared with the method of tightening the screws, the quick-release bolt 3 and the rotating nut 4 can be prevented from being lost due to repeated disassembly and assembly, the number of tool repairs can be reduced, the use time can be extended, and the risk of generating redundant materials in the aircraft working area can be reduced.

[0023] (4) A felt pad 7 with a buffering property is added to the upper surface of the movable bracket 6 of the aircraft part unlocking stroke measuring device that is in direct contact with the aircraft part, which can play a protective role and strengthen the protection of the aircraft part to prevent the metal part of the measuring tool from directly contacting the aircraft component during installation and use to cause scratches, resulting in surface quality defects and unnecessary losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the overall schematic diagram of the unlocking stroke measuring device for aircraft parts;

[0025] Figure 2 is a schematic diagram of the clamping mechanism;

[0026] Figure 3 Schematic diagram of the application reading of the unlocking stroke measuring device for aircraft parts.

[0027] Among them: 1-left fixing frame, 2-right fixing frame, 3-quick release bolt, 4-rotating nut, 5-lower stop base, 6-movable bracket, 7-felt pad, 8-screw, 9-driven gear, 10-upper stop base, 11-rotating handle, 12-scale rod, 13-plain rod, 14-rotating shaft, 15-main gear, 16-rotating pin. DETAILED DESCRIPTION

[0028] The specific implementation methods and steps of the present invention are as follows:

[0029] 1) Before measuring the unlocking stroke of aircraft parts, it is necessary to first check the motion mechanism and the clamping area of ​​the measuring tool in the surrounding area of ​​the part measurement to ensure that there are no redundant objects and mechanical damage in the working area.

[0030] 2) Loosen the quick-release bolt 3, rotate the left fixing frame 1 and the right fixing frame 2, and open the clamping area of ​​the part unlocking stroke measuring tool.

[0031] 3) First, bring the right fixing bracket 2 close to the cylindrical surface to be installed, rotate it along the cylindrical surface, and move the left fixing bracket 1 to the desired position.

[0032] 4) Keep the measuring tool in place, put the quick-release bolt 3 into the bolt fixing slot on the left fixing frame 1, tighten the quick-release bolt 3 with a flat-blade screwdriver or by hand to complete the clamping of the part unlocking stroke measuring tool. During the tightening process, make sure that the rotating nut 4 is in the nut slot on the right fixing frame 2.

[0033] 5) Install the lower stop base 5 of the measuring tool with the movable bracket 6, felt pad 7, lead screw 8, and rotating handle 11 onto the aircraft part from one side. During installation, adjust the position of the movable bracket 6 by rotating the rotating handle 11 so that it is below the moving end of the part and has a certain gap with the part.

[0034] 6) After completing the clamping work of the stroke measuring tool for part unlocking, check the firmness of the fixation of the stroke measuring tool and the gap with the surrounding mechanisms to ensure that the stroke measuring tool does not collide with the aircraft moving mechanism during the unlocking process of the aircraft parts.

[0035] 7) Perform pre-tightening work before inspection. When inspecting, first turn the rotating handle 11 counterclockwise to allow the movable bracket 6 to slowly approach the moving end of the part, and then stop rotating the rotating handle 11 when the two are in contact.

[0036] 8) Check the unlocking stroke of the part. First, read the current position data A mm through the scale lines engraved on the scale rod 12 and the scale pointer on the movable bracket 6. Then, rotate the rotating handle 11 counterclockwise. The movable bracket 6 drives the moving end of the part to move until the unlocking moment. Stop rotating the rotating handle 11. At this time, read the scale data B mm. At this time, the unlocking stroke of the part C = BA mm.

[0037] 9) After completing the part unlocking stroke inspection, first detach the lower stop base 5 from the aircraft part, then keep the unlocking stroke measuring tool in place, use a flat-blade screwdriver or hand to loosen the quick-release bolt 3, and when the quick-release bolt 3 is loose, take it out of the bolt slot on the right fixing bracket 2. At this time, remove the unlocking stroke measuring tool from the measuring area.

[0038] 10) After disassembly, count the number of parts of the unlocking stroke measuring tool, check its integrity, and pack and store them after passing the inspection.

Claims

1. An aircraft parts unlocking stroke measuring device, characterized in that: The aircraft parts unlocking stroke measuring device comprises a clamping mechanism, a fixed base mechanism and a driving mechanism; The left fixing frame (1) and the right fixing frame (2) are both semicircular and connected via a rotating pin (16) to form a clamping mechanism for clamping an aircraft part unlocking stroke measuring tool onto the surface of the part housing and then locking it via a quick-release bolt (3) and a rotating nut (4); The fixed base mechanism comprises a lower stop base (5), a lead screw (8), a driven gear (9), an upper stop base (10), a scale rod (12) and a smooth rod (13); the end of the clamping mechanism is connected to the lower stop base (5); two lead screws (8), a scale rod (12) and a smooth rod (13) are installed between the lower stop base (5) and the upper stop base (10); the movable bracket (6) is threadedly connected to the two lead screws (8) for reciprocating motion, and a long strip groove is opened on the movable bracket; each lead screw (8) is installed with a driven gear (9); a scale pointer is provided on the movable bracket (6) to obtain the scale in cooperation with the scale rod (12); The driving mechanism comprises a rotating handle (11), a rotating shaft (14) and a main gear (15), which are connected in sequence; the rotating shaft (14) passes through a through hole of the upper stop base (10), and the main gear (15) meshes with each driven gear (9).

2. The aircraft parts unlocking stroke measuring device according to claim 1, characterized in that: The mounting points of the two lead screws (8) are respectively located at the end points of one diameter of the two bases, and the mounting points of the scale rod (12) and the smooth rod (13) are respectively located at the end points of the other diameter of the two bases, and the two diameters are perpendicular to each other.

3. The aircraft parts unlocking stroke measuring device according to claim 1 or 2, characterized in that: A felt pad (7) is adhered to the contact surface of the movable bracket (6).

4. The aircraft parts unlocking stroke measuring device according to claim 1, characterized in that: The lower stop base (5) is provided with a long strip slot for being directly mounted on one side of an aircraft part.

5. The aircraft parts unlocking stroke measuring device according to claim 1, characterized in that: The quick-release bolt (3) is a cylinder, a head of which is provided with a slotted opening, and an embossing treatment is performed on the side cylindrical surface.

6. A method for measuring the unlocking stroke of aircraft parts, characterized in that: The aircraft parts unlocking stroke measuring device according to any one of claims 1 to 5 comprises the following steps: 1) Loosen the quick-release bolt (3), rotate the left fixing frame (1) and the right fixing frame (2), and open the clamping area of ​​the part unlocking stroke measuring device; first move the right fixing frame (2) close to the cylindrical surface to be installed, rotate it along the cylindrical surface, and move the left fixing frame (1) to the desired position; fix the quick-release bolt (3); 2) Installing the lower stop base (5) with the moving bracket (6), the felt pad (7), the lead screw (8) and the rotating handle (11) onto the aircraft part from one side, and rotating the rotating handle (11) to adjust the position of the moving bracket (6) so that it is below the moving end of the part and has a certain gap with the part; 3) To perform pre-tightening work before inspection, first turn the rotating handle (11) counterclockwise to allow the moving bracket (6) to slowly approach the moving end of the part, and then stop rotating the rotating handle (11) until the two are in contact; 4) Check the unlocking stroke of the part. First, read the current position data Amm through the scale lines engraved on the scale rod (12) and the scale pointer on the movable bracket (6). Then, turn the rotating handle (11) counterclockwise, and the movable bracket (6) drives the moving end of the part to move until the unlocking moment. Stop turning the rotating handle (11) and read the scale data Bmm. At this time, the unlocking stroke of the part C = B-Amm.

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