Aircraft push-to-close miniature force lock
By designing a small, press-type load-bearing lock for aircraft, the problem of needing tools to tighten nuts on aircraft maintenance access covers was solved, enabling rapid installation and removal and improving aircraft availability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGXI HONGDU AVIATION IND GRP
- Filing Date
- 2023-10-23
- Publication Date
- 2026-06-09
Smart Images
Figure CN117514989B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of aircraft supporting structure design, specifically relating to a small press-type load-bearing lock for aircraft. Background Technology
[0002] There are many maintenance access panels on the surface of the aircraft structure, and these maintenance access panels need to withstand the overall aerodynamic loads of the aircraft.
[0003] Maintenance access panels are often connected to the airframe structure using a support plate nut. Opening the access panel requires using tools to unscrew the support plate nut, and after the inspection and maintenance are completed, the support plate nut needs to be screwed back on using tools. This is time-consuming and labor-intensive, prolonging the maintenance operation time and affecting the aircraft's sortie rate during wartime.
[0004] Therefore, it is necessary to design a cap load-bearing lock that can be quickly installed and disassembled. Summary of the Invention
[0005] To address the issue of rapid installation and removal of load-bearing caps, this invention provides a push-button type small load-bearing lock for connecting aircraft caps.
[0006] In this invention, the outer end refers to the end closest to the outer surface of the aircraft, and the inner end refers to the end furthest from the outer surface of the aircraft.
[0007] This invention proposes a small, press-type load-bearing lock for aircraft, comprising a lock body base, a hook, a slider, a tension spring, a pull rod, and a lock cylinder, wherein...
[0008] The lock body base has a cylindrical structure, which includes a 3 / 4 cylindrical cavity and a 1 / 4 cylindrical solid. On one side of the 1 / 4 cylindrical solid, there is an axially extending guide groove and a slider movement groove, with an L-shaped movement groove partition between them. The slider movement groove is radially outward relative to the guide groove. The L-shaped movement groove partition has a hook guide groove, which is far from the center line at its outer end near the opening side and close to the center line at its inner end. The slider movement groove is connected to the outer end of a tension spring at its outer end and rotatably mounted with the inner arm of a U-shaped pull rod at its inner end.
[0009] The lock cylinder includes a 3 / 4 cylindrical solid and a 1 / 4 cylindrical notch that are combined with the lock body seat. A lock cylinder guide boss with a locking groove is arranged on one side of the 1 / 4 cylindrical notch. When the lock cylinder is inserted into the lock body seat, the lock cylinder guide boss slides into the guide groove.
[0010] The hook includes an outer locking block and an inner rotating connection structure, and the locking block has a hook guide boss on its side that inserts into the hook guide groove;
[0011] The slider body is a block structure embedded in the inner end notch of the L-shaped motion groove partition. Its upper end extends beyond the L-shaped motion groove partition, and its lower end sits on the slider motion groove. This block structure has a guide portion extending outward into the guide groove. The inner side of this guide portion is hinged to the hook. When the lock cylinder is inserted into the lock body seat, the locking block can be inserted into the locking groove. On the outer surface of the slider located in the slider motion groove, from the outside inward, there is a spring connection structure, a push plate, and a guide groove. The spring connection structure connects to the inner end of the tension spring, and the push plate extends beyond... The slider moves in a groove so that it can be squeezed by the lock cylinder; the outer arm of the U-shaped pull rod is perpendicularly abutted against the bottom of the guide groove under the action of pre-tightening force. The guide groove includes a clockwise closed-loop movement trajectory during the insertion and removal of the lock cylinder and guide groove steps that are distributed and descend sequentially on the movement trajectory. When the lock cylinder is inserted into the lock body seat, the outer arm is restricted to the angle position of the movement trajectory and thus locked. When the lock cylinder is pressed further inward, the outer arm is released from the angle restriction of the movement trajectory and the lock cylinder is dislodged under the action of spring tension.
[0012] Advantageously, the guide rail steps include a first guide rail step, a second guide rail step, a third guide rail step, and a fourth guide rail step that descend sequentially. The first guide rail step is the start and end position of the closed loop. When the lock cylinder is inserted, the outer support arm is blocked by the first guide rail step and guided to move along the movement trajectory. It slides down when it passes the second guide rail step, at which point the pressure on the lock cylinder stops. Under the action of the spring tension, the outer support arm is blocked by the second guide rail step and guided to move along the movement trajectory. It slides down when it passes the third guide rail step. The movement trajectory at this position has an angle, and the lock cylinder is locked. When the lock cylinder is pressed again, the outer support arm is blocked by the third guide rail step and guided to move along the movement trajectory. It slides down when it passes the fourth guide rail step, at which point the pressure on the lock cylinder stops. Under the action of the spring tension, the outer support arm is blocked by the fourth guide rail step and guided to move along the movement trajectory until it slides down when it reaches the first guide rail step.
[0013] Advantageously, the trajectory is based on a non-rectangular parallelogram with inward-facing angles at its outer edges.
[0014] Advantageously, the inner surface of the channel for the moving trajectory is formed by the first central guide groove boss, and the outer surface of the channel for the transition section between the third guide groove step and the fourth guide groove step is formed by the second central guide groove boss.
[0015] Advantageously, the movement trajectory also includes a straight-line trajectory preceding the closed-loop movement trajectory.
[0016] Advantageously, the hook also has a step in the middle that allows it to be aligned with the guide portion when locked.
[0017] Advantageously, the slider movement groove has a tension spring fixing boss A near the opening side, and the outer end of the tension spring is connected to the tension spring fixing boss A.
[0018] Advantageously, the spring connection structure on the slider is a tension spring fixing boss B.
[0019] Advantageously, the rotatable connection structure of the hook is a hook rotatable boss that is inserted into the shaft hole of the slider.
[0020] Advantageously, the lock body seat is mounted on the body structure, and the lock cylinder is mounted on the cover.
[0021] Beneficial effects: This invention can effectively connect the aircraft cover to the aircraft structure, and the disassembly and assembly are convenient and quick, effectively reducing the time in the process of disassembling and assembling the aircraft cover and improving the aircraft's availability. Attached Figure Description
[0022] Figure 1 and Figure 2 These are exploded views of the components of the aircraft-type push-button small load-bearing lock of this invention at two different angles;
[0023] Figure 3 This is a perspective view of the lock cylinder;
[0024] Figure 4 This is a perspective view of the lock body base;
[0025] Figure 5 This is a schematic diagram of a half-section of the lock body seat;
[0026] Figure 6 and Figure 7 These are the top and oblique views of the slider and hook after assembly;
[0027] Figure 8 This is the lock body assembly drawing;
[0028] Figure 9 This is a schematic diagram of the internal installation structure of the lock body;
[0029] Figure 10 This is a schematic diagram of a half-section of the lock body;
[0030] Figure 11 This is a diagram showing the locked state.
[0031] In the diagram: 1-Lock body seat; 2-Hook; 3-Slider; 4-Tension spring; 5-Pull rod; 6-Lock cylinder; 7-Locking groove; 8-Lock cylinder guide boss; 9-Hook guide groove; 10-Guide groove; 11-Tension spring fixing boss A; 12-Hook rotating boss; 13-Hook guide boss; 14-Tension spring fixing boss B; 15-Motion trajectory; 16-Guide groove; 17-First guide groove step; 18-Second guide groove step; 19-Third guide groove step; 20-Fourth guide groove step; 21-First center guide groove boss; 22-Second center guide groove boss; 23-L-shaped motion groove partition; 24-Slider motion groove; 25-Push plate Detailed Implementation
[0032] To achieve the above objectives, a push-button miniature load-bearing lock for connecting aircraft hatches is designed. The components of this push-button miniature load-bearing lock are as follows: Figure 1 , Figure 2 As shown, the load-bearing lock mainly consists of a lock body seat 1, a hook 2, a slider 3, a tension spring 4, a pull rod 5, and a lock cylinder 6.
[0033] Among them, lock cylinder 6 Figure 3 As shown, the part into which the lock cylinder is inserted is a 3 / 4 cylinder, and a lock cylinder guide boss 8 with a notch is arranged at a certain distance from the axis of the cylinder. This notch forms a locking groove 7.
[0034] Lock body seat such as Figure 4-5 As shown, it is a cylinder with a quarter-cylindrical solid portion and a sealed bottom. A guide groove 10 and a slider movement groove 24 are arranged in the quarter-cylindrical solid portion. The guide groove 10 is used for guiding the lock cylinder during insertion, and the slider movement groove 24 is used for the assembly and installation of the tension spring 4 and the slider 3.
[0035] The guide groove 10 and the slider movement groove 24 are separated by an L-shaped movement groove partition 23. An oblique hook guide groove 9 is arranged on the L-shaped movement groove partition 23, and a tension spring fixing boss A11 is arranged on the top of the lock body.
[0036] The assembly diagram of the slider and hook is as follows: Figure 6 , Figure 7 As shown, a tension spring fixing boss B14 is arranged at the end of the slider 3, and a hook rotating boss 12 is arranged at the bottom. A guide groove 16 is arranged on the slider 3. The guide groove 16 is composed of a first guide groove step 17, a second guide groove step 18, a third guide groove step 19, and a fourth guide groove step 20. The first guide groove step 17 is slightly higher than the starting end of the guide groove 16, the second guide groove step 18 is slightly higher than the third guide groove step 19, and the third guide groove step 19 is slightly higher than the fourth guide groove step 20. The guide groove 16 can ensure that the pull rod 5 moves along the motion trajectory 15. The first central guide groove boss 21 and the second central guide groove boss 22 are designed in a folded shape, and the turning point B is used for locking and fixing the pull rod 5. A hook guide boss 13 is arranged on the side of the head of the hook 2. The hook guide boss 13 can move in the hook guide groove 9. The slider 3 and the hook 2 are hinged together by the hook rotating boss 12. The hook 2 can rotate around the hook rotating boss 12 by a certain angle.
[0037] Lock body assembly drawing and cross-sectional drawing as follows Figure 8-10As shown, the tension spring fixing boss B14 on the slider 3 is connected to the tension spring fixing boss A11 on the lock body seat 1 through the tension spring 4. The upper end of the slider 3 is connected to the lock body seat 1 through the pull rod 5. The pull rod 5 is pressed against the guide groove 16. One end of the hook 2 is fixed to the slider 3 through the hook rotating boss 12, and the other end of the hook 2 is fixed in the hook guide groove 9 through the hook guide boss 13.
[0038] Cross-sectional view of the locking state of a small load-bearing lock as shown in the figure Figure 11 As shown.
[0039] This invention is a push-button miniature load-bearing lock for connecting an aircraft load-bearing cover to the aircraft structure. The appropriate diameter and length of the miniature load-bearing lock are selected based on the specific dimensions of the cover and the aircraft structure to be connected. The miniature load-bearing lock body base 1 is installed on the aircraft structure. The assembly diagram of the miniature load-bearing lock body is shown below. Figure 8 As shown, at this time, the tension spring 4 is in its normal state, and the pull rod 5 is located at the bottom A of the guide groove 16 on the slider 3, as shown. Figure 9 As shown, the hook guide boss 13 at the end of hook 2 is located at the top C of hook guide groove 9, as... Figure 10 As shown.
[0040] When installing the cover, insert the load-bearing lock cylinder 6. The lock cylinder 6 enters the lock body along the guide groove 10 on the lock body seat 1. The bottom E end face of the lock cylinder guide boss 8 of the lock cylinder 6 is as follows: Figure 3 As shown, the slider 3 moves downwards, and at this time, the hook 2 slowly rotates around the hook rotating boss 12. The hook rotating boss 12 at the end of the hook 2 moves from the top C to the bottom D along the hook guide groove 9. Figure 8 As shown, at the same time, the lever 5 moves from point A to point B along the motion trajectory 15.
[0041] As the lock cylinder 6 reaches the bottom of the lock body seat 1, the hook head of the pull hook 2 engages in the locking groove 7. Simultaneously, the pull rod 5 engages in the groove B in the middle of the first central guide groove boss 21, causing the tension spring 4 to be in a stretched state. At this time, the small load-bearing lock is in the locked state. Figure 11 As shown.
[0042] Pressing the top of the load-bearing lock cylinder 6, the pull rod 5 continues to move along the movement trajectory 15. The pull rod 5 disengages from the groove B in the middle of the first central guide groove boss 21. The tension spring 4 begins to contract under the action of the rebound force. At the same time, the tension spring 4 pulls the slider 3 and the hook 2 upward together. The hook at the end of the hook 2 disengages from the locking groove 7. The guide boss 13 at the end of the hook moves from the bottom D to the top C along the hook guide groove 9. The pull rod 5 also moves along the movement trajectory 15 to the bottom A of the guide groove 16. The lock cylinder 6 slowly pops out.
Claims
1. A small, press-type load-bearing lock for aircraft, characterized in that: It includes a lock body base (1), a hook (2), a slider (3), a tension spring (4), a pull rod (5), and a lock cylinder (6), among which The lock body seat (1) is a cylindrical structure, which includes a 3 / 4 cylindrical cavity and a 1 / 4 cylindrical solid. On one side of the 1 / 4 cylindrical solid, there is an axially extending guide groove (10) and a slider movement groove (24). Between the two is an L-shaped movement groove partition (23). The slider movement groove (24) is radially outward relative to the guide groove (10). The L-shaped movement groove partition (23) has a hook guide groove (9). The hook guide groove (9) is far from the center line at the outer end near the opening side and close to the center line at the inner end. The slider movement groove (24) is connected to the outer end of the tension spring (4) at the outer end and the inner arm of the U-shaped pull rod (5) is rotatably installed at the inner end. The lock cylinder (6) includes a 3 / 4 cylindrical solid and a 1 / 4 cylindrical notch that are combined with the lock body seat (1). A lock cylinder guide boss (8) with a locking groove (7) is arranged on one side of the 1 / 4 cylindrical notch. When the lock cylinder (6) is inserted into the lock body seat (1), the lock cylinder guide boss (8) slides into the guide groove (10). The hook (2) includes a locking block at the outer end and a rotating connection structure at the inner end, and a hook guide boss (13) is provided on the side of the locking block for inserting into the hook guide groove (9); The slider (3) is a block structure embedded in the notch at the inner end of the L-shaped motion groove partition (23). The upper end extends beyond the L-shaped motion groove partition (23), and the lower end sits on the slider motion groove (24). The block structure has a guide portion that extends outward into the guide groove (10). The inner side of the guide portion is hinged to the hook (2). When the lock cylinder (6) is inserted into the lock body seat (1), the locking block can be inserted into the locking groove (7). The slider (3) has a spring connection structure, a push plate (25), and a guide groove (16) on the outer side of the slider motion groove (24) from the outside to the inside. The spring connection structure is connected to the inner end of the tension spring (4), and the push plate (25) is connected to the inner end of the tension spring (4). The outer arm of the U-shaped lever (5) is perpendicular to the bottom of the guide groove (16) under the action of the pre-tightening force. The guide groove (16) includes a clockwise closed-loop movement trajectory (15) and guide groove steps that are distributed on the movement trajectory (15) and decrease sequentially. When the lock cylinder (6) is inserted into the lock body seat (1), the outer arm is restricted to the angle position of the movement trajectory (15) and thus locked. When the lock cylinder (6) is pressed further inward, the outer arm is released from the angle restriction of the movement trajectory (15) and the lock cylinder (6) is dislodged under the action of the spring tension.
2. The aircraft-type push-button miniature load-bearing lock according to claim 1, characterized in that: The guide rail steps include a first guide rail step (17), a second guide rail step (18), a third guide rail step (19), and a fourth guide rail step (20) that descend sequentially. The first guide rail step (17) marks the beginning and end positions of the closed loop. When the lock cylinder (6) is inserted, the outer support arm is blocked by the first guide rail step (17) and guided to move along the movement trajectory (15). It slides down when passing the second guide rail step (18), at which point pressure on the lock cylinder (6) ceases. Under the action of the spring tension, the outer support arm is blocked by the second guide rail step (18) and guided along... The moving trajectory (15) moves and slides down when it passes the third guide groove step (19). The moving trajectory (15) at this position has an angle, and the lock cylinder (6) is locked. When pressure is applied to the lock cylinder (6) again, the outer support arm is blocked by the third guide groove step (19) and guided to move along the moving trajectory (15). It slides down when it passes the fourth guide groove step (20). At this time, the pressure on the lock cylinder (6) stops. Under the action of the spring tension, the outer support arm is blocked by the fourth guide groove step (20) and guided. It slides down when it moves along the moving trajectory (15) to the first guide groove step (17).
3. The aircraft-type push-button miniature load-bearing lock according to claim 2, characterized in that: The basis of the movement trajectory (15) is a non-rectangular parallelogram with inward included angles at its outer edges.
4. The aircraft-type push-button miniature load-bearing lock according to claim 3, characterized in that: The inner surface of the channel of the moving trajectory (15) is formed by the first central guide groove boss (21), and the outer surface of the transition section between the third guide groove step (19) and the fourth guide groove step (20) is formed by the second central guide groove boss (22).
5. The aircraft-type push-button miniature load-bearing lock according to claim 4, characterized in that: The movement trajectory (15) also includes the straight-line trajectory preceding the closed-loop movement trajectory.
6. The aircraft-type push-button miniature load-bearing lock according to claim 5, characterized in that: The hook (2) also has a step in the middle that can be aligned with the guide portion when locked.
7. The aircraft push-button miniature load-bearing lock according to any one of claims 1-6, characterized in that: The slider movement groove (24) has a tension spring fixing boss A (11) near the opening side, and the outer end of the tension spring (4) is connected to the tension spring fixing boss A (11).
8. The aircraft push-type miniature load-bearing lock according to any one of claims 1-6, characterized in that: The spring connection structure on the slider (3) is a tension spring fixing boss B (14).
9. The aircraft push-button miniature load-bearing lock according to any one of claims 1-6, characterized in that: The rotating connection structure of the hook (2) is a hook rotating boss (12), which is inserted into the shaft hole of the slider (3).
10. The aircraft push-type miniature load-bearing lock according to any one of claims 1-6, characterized in that: The lock body seat (1) is installed on the machine body structure, and the lock cylinder (6) is installed on the cover.