A positioning device for the windscreen split surface of a fighter aircraft

Abstract

The present invention provides a fighter windshield sub - surface positioning device, belonging to the technical field of aviation equipment. The device includes a joint, a quick - release pin, an adjusting rod, a booster rod, a support, a pressure foot, a pull rod frame and a nut. The present invention adopts the method of pre - positioning before disassembly. Compared with the method of measuring and adjusting before and after disassembly, the positioning is more accurate, avoiding measurement errors. Compared with the method of measuring and adjusting before and after disassembly, the device of the present invention can achieve direct positioning, which is simple, fast and improves production efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of aviation equipment, and relates to a windshield split surface positioning device. Before the windshield glass is removed, this device is used to position the size of the windshield split surface to prevent the displacement of the windshield split surface after the windshield glass is removed. Background Art

[0002] The windshield is an important part of the aircraft life-saving system. It forms an integral sealed cockpit with the openable cockpit cover, providing a safe and comfortable in-air working environment for the pilot. During flight, the windshield glass not only bears the external aerodynamic pressure that changes constantly, but also bears the internal load of the cockpit. The tight combination of the windshield and the cockpit cover is the key technical index to ensure the in-air working environment and an important technical requirement to ensure the overall airtightness of the cockpit. Once the overall airtightness of the cockpit fails and the cockpit has air leakage or information leakage faults, it will endanger flight and life safety.

[0003] The fighter windshield mainly consists of a windshield glass, a windshield frame, a pressing plate, a cover plate, bolts, etc. The windshield split surface is a part of the windshield frame, located at the rear of the windshield glass, with an inclined shape and tightly combined with the windshield glass. The shape of the windshield split surface is relatively complex, with baffles at both the front and the rear. See the external view of the windshield in Figure 1 .

[0004] When the fighter is being repaired, the windshield glass needs to be disassembled and replaced. After the windshield glass is disassembled, the windshield split surface loses its supporting force and generates a position shift. When reinstalling, due to the displacement of the windshield split surface, if not controlled, it is difficult to restore it to the position before the windshield glass was disassembled, resulting in the out-of-tolerance of important technical indexes such as the fitting clearance and step difference between the cockpit cover and the windshield, making it difficult for the cockpit cover and the windshield to be tightly combined and difficult to ensure the repair quality of the fighter.

[0005] At the present stage, there is no effective control method, and only by relying on the method of measuring and recording the original data, the shape and position dimensions of the windshield split surface can be adjusted and restored during installation, but it is difficult to ensure the dimensional requirements. Summary of the Invention

[0006] In order to solve the above problems in the prior art, the present invention proposes a special windshield split surface positioning device. Before the windshield glass is disassembled, this device is used to position the size of the windshield split surface to ensure that the windshield split surface does not move during the whole process of disassembly, repair, installation, etc., and to ensure its shape and position dimensions.

[0007] The technical solution of the present invention is as follows:

[0008] A fighter windshield split surface positioning device includes a joint A 1, a quick-release pin 2, an adjusting rod 3, a force-increasing rod 4, a stop head 5, a joint B 6, a screw 7, a self-locking nut 8, a support 9, a protective pad 10, a pressure foot 11, a pull rod frame 12, and a nut 13.

[0009] The front end of the joint A1 is provided with a through hole which is matched with the docking slot hole and can be connected to the docking slot at the front of the windshield; the rear part of the joint A1 is a threaded rod for screwing with the adjusting rod 3.

[0010] The quick-release pin 2 includes a pin tongue a, a pin shaft b, a pin rod c and a pull ring d; wherein, the front end of the pin rod c is connected to the pull ring d, the end of the pin rod c is slotted, the pin tongue a is inserted into the slot and connected to the pin rod c through the pin shaft b. The pin tongue a end of the quick-release pin 2 is inserted into the through hole at the front end of the joint A1, and the joint A1 is connected and fixed to the front windshield structural member by rotating the pin tongue a.

[0011] The adjusting rod 3 is composed of a round nut Ⅰ e, a sleeve rod f and a round nut Ⅱ g; wherein, the sleeve rod f is a hollow tubular structure with scales marked thereon, and the size can be directly read out; a through hole is made in the middle of the sleeve rod f. Both the round nut Ⅰ e and the round nut Ⅱ g are provided with internal threads and are respectively screwed onto the joint A1 and the joint B6; the joint A1 and the joint B6 are respectively screwed onto both ends of the sleeve rod f, the overall length is adjusted by rotating the sleeve rod f, and the round nut Ⅰ e and the round nut Ⅱ g are rotated and locked at both ends of the sleeve rod f to ensure the fixed size requirements.

[0012] The force adding rod 4 is cylindrical and is installed in the through hole of the sleeve rod f on the adjusting rod 3. The overall length dimension of the adjusting rod 3, the joint A1 and the joint B6 is adjusted by adding force to ensure that the size meets the positioning requirements.

[0013] The stop head 5 is connected and fixed to the end of the force adding rod 4 to play a limiting role and prevent the force adding rod 4 from sliding out of the middle through hole of the adjusting rod 3.

[0014] The joint B6 is composed of a screw rod h, a reinforcing plate i and a connecting sleeve j; wherein, one end of the screw rod h is threaded and screwed with the adjusting rod 3; the other end is connected to the middle of the connecting sleeve j, and the connection between the two is further strengthened by the reinforcing plate i. An axial hole is made in the connecting sleeve j for screwing with the support 9.

[0015] The support 9 is composed of a pull rod seat k, an arc plate l, a support plate m and a connecting ear n; wherein, the arc plate l is connected to the support plate m, and the included angle between the two ensures that it can be closely attached to the windshield split surface, preferably 106°; two pull rod seats k are symmetrically connected to the bottom of the support plate m, and through holes are provided on the pull rod seats k; two connecting ears n are symmetrically connected to the outer side surface where the arc plate l is connected to the support plate m and are located between the two pull rod seats k; through holes are provided on the connecting ears n, and they are screwed with the connecting sleeve j of the joint B6 through the screw 7 and the self-locking nut 8.

[0016] The protective pad 10 is made by cutting a rubber plate and pasted on the arc plate l and the support plate m of the support 9, mainly playing a role in buffering and filling gaps.

[0017] There are 2 pieces of the pull rod frame 12 in total, which are both formed by welding a pull rod o and a pressure rod p; among them, the pressure rod p is a bent structure, and its bending angle meets the positioning and fitting requirements of the windshield parting surface, preferably 85°; the front end of the pull rod o is threaded and is screwed and fixed to the pull rod seat k on the support 9 through a nut 13, and the shape and position dimensions of the pull rod frame 12 and the support 9 are adjusted by adjusting the position of the nut 13.

[0018] The pressure foot 11 is connected to the end of the pressure rod p on the pull rod frame 12, and through the method of making the mouth closed, the pressure foot 11 can rotate freely inside the end of the pressure rod p, so as to realize the free adjustment of the angle and ensure the positioning requirements of different shapes.

[0019] The beneficial effects of the present invention:

[0020] 1) The device described in the present invention adopts the method of pre-positioning before disassembly. Compared with the method of measuring and adjusting before and after disassembly, the positioning is more accurate and measurement errors are avoided;

[0021] 2) Compared with the method of measuring and adjusting before and after disassembly, the device described in the present invention can achieve direct positioning, which is simple, fast and improves production efficiency. Description of the Drawings

[0022] Figure 1 It is an external shape diagram of a fighter windshield.

[0023] Figure 2 It is a schematic diagram of the external shape structure of the device described in the present invention.

[0024] Figure 3 It is a schematic diagram of a quick-release pin.

[0025] Figure 4 It is a schematic diagram of an adjusting rod.

[0026] Figure 5 It is a schematic diagram of joint B.

[0027] Figure 6 It is a schematic diagram of the support; among them, (a) is the front view and (b) is the side view.

[0028] Figure 7 It is a schematic diagram of the pull rod frame.

[0029] Figure 8 It is a schematic diagram of the pressure foot.

[0030] In the figure: 1 joint A; 2 quick-release pin; 3 adjusting rod; 4 force-increasing rod; 5 stop head; 6 joint B; 7 screw; 8 self-locking nut; 9 support; 10 protective pad; 11 pressure foot; 12 pull rod frame; 13 nut; a pin tongue; b pin shaft; c pin rod; d pull ring; e round nut I; f sleeve rod; g round nut II; h screw rod; i reinforcing plate; j connecting sleeve; k pull rod seat; l arc plate; m support plate; n connecting ear; o pull rod; p pressure rod. Detailed implementation mode

[0031] The following further explains the detailed implementation mode of the present invention in combination with embodiments and drawings, but is not used to limit the present invention.

[0032] As Figure 2 shown, a fighter windshield sub-surface positioning device includes joint A 1, quick-release pin 2, adjusting rod 3, power boost rod 4, stop head 5, joint B 6, screw 7, self-locking nut 8, support 9, protective pad 10, pressure foot 11, pull rod frame 12 and nut 13.

[0033] The front end of the joint A1 is provided with a through hole with a diameter of 8.2 mm, which is matched with the docking groove hole and can be connected to the front docking groove of the windshield; the rear part of the joint A1 is a threaded rod for screwing with the adjusting rod 3, and rotating the joint A1 realizes length adjustment.

[0034] The quick-release pin 2 includes a pin tongue a, a pin shaft b, a pin rod c and a pull ring d; among them, the front end of the pin rod c is connected to the pull ring d, the end of the pin rod c is slotted, and the pin tongue a is inserted into the slot and connected to the pin rod c through the pin shaft b. The pin tongue a end of the quick-release pin 2 is inserted into the through hole at the front end of the joint A1, and the joint A1 is connected and fixed to the front structural member of the windshield by rotating the pin tongue a.

[0035] The adjusting rod 3 is composed of a round nut I e, a sleeve rod f and a round nut II g; among them, the sleeve rod f is a hollow tubular structure, marked with scales on it, and the size can be directly read; a through hole with a diameter of 8.5 mm is made in the middle of the sleeve rod f. Both the round nut I e and the round nut II g are provided with internal threads and are respectively screwed on the joint A 1 and the joint B 6; the joint A 1 and the joint B 6 are respectively screwed to both ends of the sleeve rod f, the sleeve rod f is rotated to adjust the overall length, and the round nut I e and the round nut II g are rotated and locked at both ends of the sleeve rod f to ensure the fixed size requirements.

[0036] The power boost rod 4 is cylindrical and is installed in the through hole of the sleeve rod f on the adjusting rod 3. By applying force, the overall length dimension of the adjusting rod 3, the joint A 1 and the joint B 6 is adjusted to ensure that the size meets the positioning requirements.

[0037] The stop head 5 is fixedly connected to the end of the power boost rod 4 to play a limiting role and prevent the power boost rod 4 from slipping out of the middle through hole of the adjusting rod 3.

[0038] The joint B 6 is composed of a screw rod h, a reinforcing plate i and a connecting sleeve j; among them, one end of the screw rod h is provided with a thread and is screwed to the adjusting rod 3; the other end is connected to the middle of the connecting sleeve j, and the connection between the two is further strengthened through the reinforcing plate i. An axial hole is made in the connecting sleeve j for screwing with the support 9.

[0039] The support 9 is composed of a tie rod seat k, an arc plate l, a support plate m, and an ear n. Among them, the arc plate l is connected to the support plate m, and the included angle between them is 106°. Two tie rod seats k are symmetrically connected to the bottom of the support plate m, and through holes are provided on the tie rod seats k. Two ears n are symmetrically connected to the outer side surface where the arc plate l and the support plate m are connected and are located between the two tie rod seats k. Through holes are provided on the ears n, and they are screwed to the connecting sleeve j of the joint B 6 through screws 7 and self-locking nuts 8.

[0040] The protective pad 10 is made by cutting a rubber plate and is pasted on the arc plate l and the support plate m of the support 9, mainly playing a role in buffering and filling gaps.

[0041] There are 2 pieces of the tie rod frame 12 in total, which are all formed by welding a tie rod o and a pressure rod p. Among them, the pressure rod p is a bent structure, and its bending angle is 85°. Threads are made at the front end of the tie rod o, and it is screwed and fixed to the tie rod seat k on the support 9 through a nut 13. The form and position dimensions of the tie rod frame 12 and the support 9 are adjusted by adjusting the position of the nut 13.

[0042] The pressure foot 11 is connected to the end of the pressure rod p on the tie rod frame 12, and through the method of necking, the pressure foot 11 can rotate freely within the end of the pressure rod p, so as to realize free angle adjustment and ensure the positioning requirements of different shapes.

[0043] As Figure 1 shown, before the fighter windshield needs to be disassembled and replaced, the above-mentioned fighter windshield split surface positioning device is used for positioning, and the specific steps are as follows:

[0044] 1) Insert the joint A 1 into the docking groove at the front of the windshield, insert the quick-release pin 2 into the docking hole, and rotate the pin tongue a to connect and fix the joint A1 to the front windshield structural member.

[0045] 2) Screw the round nut Ⅰ e and the round nut Ⅱ g onto the joint A 1 and the joint B 6 respectively; then screw the joint A 1 and the joint B6 to both ends of the sleeve rod f of the adjusting rod 3 respectively; insert the force-applying rod 4 into the through hole in the middle position of the sleeve rod f, and install a stop head 5 at the end of the force-applying rod 4.

[0046] 3) Use the screw 7 and the self-locking nut 8 to screw the joint B 6 and the ear n of the support 9.

[0047] 4) The support 9 rotates around the screw 7 to adjust the angle, and the force-applying rod 4 is rotated to adjust the total length of the joint A1, the adjusting rod 3, and the joint B 6, so that the arc plate l and the support plate m of the support 9 are fitted to the windshield split surface.

[0048] 5) Install the pressure foot 11 on the pressure rod p of the tie rod frame 12, insert the tie rod o of the tie rod frame 12 into the through hole of the tie rod seat k of the support 9, adjust the length of the tie rod o so that the pressure foot 11 is tightly attached to the windshield split surface, and tighten and fix it with the nut 13.

[0049] 6) Rotate the force - adding rod 4 in a timely manner according to the specific situation to adjust the length of the device, and adjust the tightening degree of the nut 13 according to specific requirements to ensure the effective fixation of the windshield split surface. Lock the round nut Ⅰe and round nut Ⅱg at both ends of the sleeve rod f for dimension positioning.

[0050] 7) After the windshield is disassembled, the device always maintains the positioning dimensions of the windshield split surface. After the installation of the new windshield is completed, the device can be disassembled in the reverse order of the above steps.

Claims

1. A positioning device for the windshield split surface of a fighter aircraft, characterized in that, the device includes joint A (1), quick-release pin (2), adjusting rod (3), force-increasing rod (4), stop head (5), joint B (6), support (9), pressure foot (11) and pull rod frame (12); a through hole is made at the front end of the joint A (1); the rear part of the joint A (1) is a threaded rod for screwing with the adjusting rod (3); the quick-release pin (2) is matched with the through hole at the front end of the joint A (1) for connecting and fixing the joint A (1) with the front structure member of the windshield; the adjusting rod (3) is composed of round nut I (e), sleeve rod (f) and round nut II (g); wherein, the sleeve rod (f) is a hollow tubular structure with scales marked thereon; a through hole is made in the middle of the sleeve rod (f); both the round nut I (e) and the round nut II (g) are provided with internal threads and are respectively screwed on the joint A (1) and the joint B (6); the joint A (1) and the joint B (6) are respectively screwed on both ends of the sleeve rod (f), the overall length is adjusted by rotating the sleeve rod (f), and the round nut I (e) and the round nut II (g) are rotated and locked at both ends of the sleeve rod (f) to ensure the fixed dimension requirements; the force-increasing rod (4) is cylindrical and is installed in the through hole of the sleeve rod (f) on the adjusting rod (3); the stop head (5) is connected and fixed to the end of the force-increasing rod (4) to prevent the force-increasing rod from sliding out of the middle through hole of the adjusting rod; the joint B (6) is composed of screw rod (h), reinforcing plate (i) and connecting sleeve (j); wherein, one end of the screw rod (h) is threaded and is screwed with the adjusting rod (3); the other end is connected to the middle of the connecting sleeve (j), and the connection between the two is strengthened by the reinforcing plate (i); an axial hole is made in the connecting sleeve (j) for screwing with the support (9); the support (9) is composed of pull rod seat (k), arc plate (l), support plate (m) and connecting ear (n); wherein, the arc plate (l) is connected to the support plate (m), and the included angle between the two ensures that it can be closely attached to the windshield split surface; two pull rod seats (k) are symmetrically connected to the bottom of the support plate (m), and through holes are provided on the pull rod seats (k); two connecting ears (n) are symmetrically connected to the outer side surface where the arc plate (l) is connected to the support plate (m) and are located between the two pull rod seats (k); through holes are provided on the connecting ears (n) for connecting with the connecting sleeve (j) of the joint B (6); there are 2 pieces of the pull rod frames (12), both of which are welded by a pull rod (o) and a pressure rod (p); wherein, the pressure rod (p) is a bent structure, and its bending angle meets the positioning and fitting requirements of the windshield split surface; the front end of the pull rod (o) is threaded and is screwed with the pull rod seat (k) on the support (9) through a nut (13), and the form and position dimensions of the pull rod frame (12) and the support (9) are adjusted by adjusting the position of the nut (13); the pressure foot (11) is connected to the end of the pressure rod (p) on the pull rod frame (12), and through the way of necking production, the pressure foot (11) can freely rotate inside the end of the pressure rod (p), so as to realize free angle adjustment and ensure the positioning requirements of different shapes; a protective pad (10) is pasted on the arc plate (l) and the support plate (m) of the support (9) to play a role of buffering and filling gaps; The included angle between the arc-shaped plate (l) and the support plate (m) on the support (9) is 106°; the bending angle of the compression bar (p) on the tie bar frame (12) is 85°.

2. A fighter windshield split surface positioning device according to claim 1, wherein, the quick-release pin (2) includes a pin tongue (a), a pin shaft (b), a pin rod (c) and a pull ring (d); wherein, the front end of the pin rod (c) is connected to the pull ring (d), the end of the pin rod (c) is slotted, the pin tongue (a) is inserted into the slot and connected to the pin rod (c) through the pin shaft (b); the pin tongue (a) end of the quick-release pin (2) is inserted into the through hole at the front end of the joint A (1), and the joint A (1) is connected and fixed to the windshield front structural member by rotating the pin tongue (a).

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