A locking, unlocking, and switch triggering mechanism for a landing gear handle.

Abstract

This invention relates to a locking and unlocking mechanism and a switch triggering mechanism for a landing gear handle, comprising a guide frame structure, a locking mechanism, a handle component, and a micro switch. All of these structures are mounted on front and rear housing plates. The position of the handle component is locked using the locking mechanism and the slot in the guide frame structure. When locking and unlocking the landing gear handle, the handle needs to be pulled to unlock and then switched, before the locking mechanism and the slot in the guide frame structure are used again to lock the position of the handle component. The advantages of this invention are that it is convenient and quick to operate, has a simple structure, and the mechanical limiting method is safe and reliable. It also avoids problems such as weak feedback during switch triggering, unsmooth handle switching, and unreliable switch triggering mechanisms. Furthermore, the mechanism is small in size and lightweight.

Description

Technical Field

[0001] This invention relates to a locking and unlocking mechanism and a switch triggering mechanism for a landing gear handle. Background Technology

[0002] The landing gear handle is a crucial switch for controlling the landing gear. The reliability of its locking mechanism and the effectiveness of its triggering mechanism are paramount to the safe control of the landing gear. Traditional landing gear handle mechanisms often suffer from complex locking and unlocking mechanisms, unreliable triggering mechanisms, and issues such as unpleasant operation or lack of feedback, all of which affect the safety and reliability of aircraft operation. Therefore, there is an urgent need for a simple and reliable landing gear handle locking, unlocking, and triggering mechanism. Summary of the Invention

[0003] The purpose of this invention is to provide a locking, unlocking, and switch triggering mechanism for a landing gear handle, which can be used for locking and unlocking the landing gear handle and triggering the landing gear switch. This invention designs a locking, unlocking, and switch triggering mechanism for a landing gear handle, including a guide frame structure, a locking mechanism, a handle assembly, and a micro switch. All of the above structures are mounted on two housing plates. The handle assembly consists of a handle head, an operating lever, a damper, a limit spring, a cam, a camshaft, a pull-out limit pin, a conversion limit pin, and a conversion limit retaining ring. The handle head is fixedly connected to the upper end of the operating lever. A conversion limit pin is provided in the middle of the operating lever, and conversion limit retaining rings are installed at both ends of the conversion limit pin. The conversion limit pin is nested in the groove of the guide frame structure, and the conversion limit retaining rings are located outside the groove. The groove of the guide frame structure is a horizontally oriented arc-shaped groove with semi-circular grooves at both ends. An axial through hole is provided at the lower part of the operating lever, and a front extension cylinder of the damper is placed in the through hole. The rear part of the front extension cylinder is a... A cylinder has an axial through hole in the middle of the damper, which connects to the front extension cylinder. An axial groove through the through hole is formed on the side wall of the front extension cylinder. A limit spring is placed at the top of the front extension cylinder. A radial hole is formed on the side wall of the axial through hole at the lower part of the operating rod. A pull-out limit pin is placed in the radial hole and is located behind the limit spring. A through hole is provided radially on the rear cylinder of the damper. The rear cylinder of the damper is axially placed in the side hole of the cam. The camshaft passes through the camshaft hole and the hole of the damper to fix the damper inside the cam. Both ends of the camshaft are fixed to the front and rear housing plates. The installation position of the camshaft is the center of the arc segment of the groove on the guide frame structure. A conversion protrusion is provided on one side of the cam, and a switch trigger protrusion one and a switch trigger protrusion two are provided on the other side of the cam.

[0004] The locking mechanism consists of a rocker plate component, a spring support component, and a rotating shaft. The upper end of the rocker plate component has a shaft hole, and a rotating shaft is installed in the shaft hole. The rotating shaft is connected to the front and rear housing plates. An installation groove is provided in the middle of the rocker plate component, and a roller is installed in the groove. The roller corresponds to the conversion protrusion provided on one side of the cam. A spring support component is provided at the corresponding position at the lower end of the rocker plate component. The bottom plate of the spring support component is fixedly connected between the two housing plates. A conversion limit spring is installed on the bottom plate of the spring support component.

[0005] There are two microswitches installed between two housing plates. The two microswitches are set along the rotation stroke of the cam. The trigger spring at the top of the microswitch cooperates with the switch trigger protrusion one and switch trigger protrusion two of the cam.

[0006] The advantages of this invention are that this structure is convenient and quick to operate, simple in structure, safe and reliable in mechanical limiting method, and avoids the problems of weak feedback during switch triggering and switching, unsmooth feel during handle switching and unreliable switch triggering mechanism. The mechanism is small in size and light in weight. Attached Figure Description

[0007] Appendix Figure 1 This is a schematic diagram of the structure of the present invention.

[0008] Appendix Figure 2 This is an exploded view of the locking mechanism of the present invention.

[0009] Appendix Figure 3 This is a schematic diagram of the handle component of the present invention.

[0010] Appendix Figure 4 This is an exploded view of the handle component of the present invention.

[0011] Appendix Figure 5 This is a schematic diagram of the cam in the handle component of the present invention.

[0012] Appendix Figure 6 This is a schematic diagram illustrating the action conversion process of the locking and unlocking mechanism and the switch triggering mechanism of the landing gear handle according to the present invention.

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Detailed Implementation

[0014] Figures 1 to 6The figure shows a locking, unlocking, and switch triggering mechanism for a landing gear handle, including a guide frame structure 1, a locking mechanism 2, a handle assembly 3, and a micro switch 4. All of these structures are mounted on two housing plates 5. The handle assembly 3 consists of a handle head 31, an operating lever 32, a damper 33, a limit spring 34, a cam 35, a camshaft 36, a pull-out limit pin 37, a conversion limit pin 38, and a conversion limit retaining ring 39. The handle head 31 is fixedly connected to the upper end of the operating lever 32. A conversion limit pin 38 is provided in the middle of the operating rod 32. Conversion limit retaining rings 39 are installed at both ends of the conversion limit pin 38. The conversion limit pin 37 is nested in the groove 11 of the guide frame structure 1. The conversion limit retaining rings 39 are located outside the groove 11. The groove 11 of the guide frame structure 1 is a horizontally oriented arc-shaped groove with semi-circular grooves at both ends. An axial through hole 325 is provided at the lower part of the operating rod 32. The front extension cylinder of the damper 33 is placed in the through hole. The rear part of the front extension cylinder is a cylinder. The damper 33 has an axial through hole 334 in the middle, which connects to the front extension cylinder. An axial groove 331 through the through hole is formed on the side wall of the front extension cylinder. A limit spring 34 is placed at the top of the front extension cylinder. A radial hole 324 is formed on the side wall of the lower part of the operating rod 32 at the axial through hole 325. A pull-out limit pin 37 is placed in the radial hole, located behind the limit spring 34. A through hole 333 is radially provided on the rear cylinder of the damper 33. The rear cylindrical part of the damper 33 is axially placed in the side hole 351 of the cam 35. The camshaft 36 passes through the camshaft hole 352 and the hole 333 of the damper 33 to fix the damper 33 inside the cam 35. The two ends of the camshaft 36 are fixed on the front and rear housing plates 5. The installation position of the camshaft 36 is the center of the arc segment of the groove 11 on the guide frame structure 1. A conversion protrusion 353 is provided on one side of the cam, and a switch trigger protrusion 1 354 and a switch trigger protrusion 2 355 are provided on the other side of the cam.

[0015] The locking mechanism 2 consists of a rocker plate component 22, a spring support component 23, and a rotating shaft 21. The upper end of the rocker plate component 22 has a shaft hole, and a rotating shaft is installed in the shaft hole. The rotating shaft is connected to the front and rear housing plates 5. An installation groove is provided in the middle of the rocker plate component 22, and a roller 223 is installed in the groove. The roller corresponds to the conversion protrusion 353 provided on one side of the cam. A spring support component is provided at the corresponding position at the lower end of the rocker plate component. The spring support component 23 is fixedly connected between the two housing plates 5. A conversion limit spring 232 is installed on the spring support component 23.

[0016] There are two microswitches 4, which are installed between two housing plates 5. The two microswitches 4 are arranged along the rotation stroke of the cam 35. The trigger spring 41 at the top of the microswitch 4 cooperates with the first trigger protrusion 354 and the second trigger protrusion 355 of the cam 35.

[0017] When the landing gear handle is in the handle locking position 1 (switch not triggered), the conversion limit spring 232 on the locking mechanism 2 provides elastic force to make the roller 223 press against the lower arc segment of the conversion protrusion 353 on the cam 35. At the same time, the conversion limit retaining ring 39 on the handle component 3 is stuck in the semi-circular groove of the right groove 11 of the guide frame structure 1. The arc features 41 of the two microswitches 4 contact the non-protruding arc segment on the cam 35. The switch is not pressed and triggered, and can be safely and reliably locked in this position. Pulling up the handle head 31 of the handle component 3 causes the operating lever 32 to drive the pull-out limit pin 37 on it to compress the limit spring 34 installed in the 331 hole of the damper 33. The conversion limit pin 38 and conversion limit retaining ring 39 on the handle component 3 move upward and disengage from the limit position of the right semi-circular groove of the groove 11 of the guide frame structure 1. The handle component 3 is unlocked. Moving the handle head 31 causes the conversion limit pin 38 and conversion limit retaining ring 39 to move along the groove 11 to the vertical position of the handle component 3. At this time, the rocker component 22 on the locking mechanism 2 rotates around the rotating shaft 21, compressing the conversion limit spring 232. The top of the conversion protrusion 353 on the cam 35 overcomes the elastic force of the conversion limit spring 232 and presses against the roller 223 on the locking mechanism 2. At this time, the conversion limit spring 232 is also at its maximum deformation and maximum elastic force, and the switch is in the ready-to-trigger state. Continue moving the handle head 31. At this time, the switch trigger protrusion 1 354 and switch trigger protrusion 2 355 on the cam 35 of the handle component 3 press the trigger spring 41 of the two micro switches 4 respectively, triggering the switch. The rocker component 22 on the locking mechanism 2 rotates around the rotating shaft 21. The conversion limit spring 232 provides elastic force to make the roller 223 press against the arc section of the conversion protrusion 353 on the cam 35. At the same time, the pull limit pin 37 of the operating lever 32 drives the handle component 3 to move down under the elastic force of the limit spring 34. The conversion limit pin 38 and the conversion limit retaining ring 39 are locked in the other limit semi-circular groove of the groove 11 of the guide frame structure 1, reliably locking the handle component 3.

Claims

1. A locking, unlocking, and switch triggering mechanism for a landing gear handle, comprising a guide frame structure, a locking mechanism, a handle assembly, and a micro switch, wherein the above structures are mounted on front and rear housing plates, characterized in that: The handle assembly consists of a handle head, an operating lever, a damper, a limit spring, a cam, a camshaft, a pull-out limit pin, a conversion limit pin, and a conversion limit retaining ring. The handle head is fixedly connected to the upper end of the operating lever. A conversion limit pin is located in the middle of the operating lever, and conversion limit retaining rings are installed at both ends of the conversion limit pin. The conversion limit pin is nested in the groove of the guide frame structure, and the conversion limit retaining rings are located outside the groove. The groove of the guide frame structure is a horizontally oriented arc-shaped groove with semi-circular grooves at both ends. An axial through hole is opened at the lower part of the operating lever, and the front extension cylinder of the damper is placed in the through hole. The rear part of the front extension cylinder is cylindrical. An axial through hole is opened in the middle of the damper, and the axial through hole connects to the front extension cylinder. An axial groove with a through hole is provided on the side wall of the extension cylinder. A limit spring is placed at the top of the front extension cylinder. A radial hole is provided on the side wall at the axial through hole of the lower part of the operating rod. A pull-out limit pin is placed in the radial hole. The pull-out limit pin is located behind the limit spring. A through hole is provided radially on the rear cylinder of the damper. The rear cylinder of the damper is placed axially in the side hole of the cam. The camshaft passes through the camshaft hole and the hole of the damper to fix the damper inside the cam. The two ends of the camshaft are fixed to the front and rear housing plates. The installation position of the camshaft is the center of the arc segment of the groove on the guide frame structure. A conversion protrusion is provided on one side of the cam. A switch trigger protrusion one and a switch trigger protrusion two are provided on the other side of the cam. The locking mechanism consists of a rocker plate component, a spring support component, and a rotating shaft. The upper end of the rocker plate component has a shaft hole, and a rotating shaft is installed in the shaft hole. The rotating shaft is connected to the front and rear housing plates. An installation groove is provided in the middle of the rocker plate component, and a roller is installed in the groove. The roller corresponds to the conversion protrusion provided on one side of the cam. A spring support component is provided at the corresponding position at the lower end of the rocker plate component. The bottom plate of the spring support component is fixedly connected between the two housing plates. A conversion limit spring is installed on the bottom plate of the spring support component. There are two microswitches installed between two housing plates. The two microswitches are set along the rotation stroke of the cam. The trigger spring at the top of the microswitch cooperates with the switch trigger protrusion one and switch trigger protrusion two of the cam.

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