CN111003153A

CN111003153A - Paddle locking device

Info

Publication number: CN111003153A
Application number: CN201911358430.XA
Authority: CN
Inventors: 付强; 贾利勇
Original assignee: Xian Aircraft Design and Research Institute of AVIC
Current assignee: Xian Aircraft Design and Research Institute of AVIC
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-04-14

Abstract

The application provides a lock oar device, its characterized in that, a lock oar device 400 includes rocking arm pivot 401, rocking arm 402, gyro wheel 403, disc 404 and spring 405, wherein: rocker arm pivot 401 sets up on engine nacelle front end structure 1, and the one end of rocker arm 402 is installed on rocker arm pivot 401, and gyro wheel 403 is installed to the other end of rocker arm 402, is provided with the actuator on the engine nacelle front end structure 1, the ejector pin top of actuator is on rocker arm 402, and the center department fixed mounting of disc 404 is epaxial at screw 3, and the edge of disc 404 is provided with the recess, the recess and the gyro wheel 403 of disc 404 match, and the gyro wheel 403 of rocker arm 402 rolls along disc 404, and the one end of spring 405 is fixed on engine nacelle front end structure 1, and the other end of spring 405 is fixed on rocker arm 402.

Description

Paddle locking device

Technical Field

The application relates to an aircraft structure design technology, in particular to a paddle locking device.

Background

For some propeller aircrafts without landing gears, such as solar unmanned planes, the propeller often rotates under the action of airflow during landing, the propeller is caused to land during grounding, and the propeller needs to be replaced after each landing. Or the propeller is stopped at a random position through motor braking, but the propeller still has a high probability of touching the ground to cause damage.

Disclosure of Invention

The invention mainly aims to lock the propeller in a horizontal position before landing and eliminate the risk of hitting the ground by the propeller.

The application provides a lock oar device, its characterized in that, a lock oar device 400 includes rocking arm pivot 401, rocking arm 402, gyro wheel 403, disc 404 and spring 405, wherein:

rocker arm pivot 401 sets up on engine nacelle front end structure 1, and the one end of rocker arm 402 is installed on rocker arm pivot 401, and gyro wheel 403 is installed to the other end of rocker arm 402, is provided with the actuator on the engine nacelle front end structure 1, the ejector pin top of actuator is on rocker arm 402, and the center department fixed mounting of disc 404 is epaxial at screw 3, and the edge of disc 404 is provided with the recess, the recess and the gyro wheel 403 of disc 404 match, and the gyro wheel 403 of rocker arm 402 rolls along disc 404, and the one end of spring 405 is fixed on engine nacelle front end structure 1, and the other end of spring 405 is fixed on rocker arm 402.

Preferably, the rollers 403 engage in the grooves of the disc 404 when the two blades of the propeller 3 are in the horizontal position.

Preferably, the other end of the swing arm 402 is mounted with a roller 403 through a rotating shaft.

Preferably, the rear end of the front panel of the nacelle front end structure 1 is connected to the motor 2.

Preferably, the ram of the actuator is against the middle or end of the rocker 402.

Preferably, two grooves are arranged at the edge of the disc 404, and the positions of the two grooves are on the same straight line with the center of the circle.

Preferably, the paddle lock device further comprises at least one damper.

Preferably, the setting position of the damper comprises a rocker arm rotating shaft 401, a rotating shaft of a roller 403 and a spring 405.

Compared with the prior art, the invention can effectively protect the propellers of certain airplanes from contacting with the ground when landing, reduce the use cost of the airplanes and improve the attendance rate of the airplanes.

Drawings

Fig. 1 is a schematic structural diagram of a paddle locking device according to an embodiment of the present disclosure;

fig. 2 is a schematic view illustrating a locked state of a paddle lock device according to an embodiment of the present disclosure;

fig. 3 is a side view of a paddle lock device according to an embodiment of the present disclosure;

fig. 4 is a schematic view illustrating a locking process state of a paddle locking device according to an embodiment of the present disclosure;

wherein: 1-engine nacelle front end structure, 2-motor, 3-propeller, 400-paddle locking device, 401-rocker arm rotating shaft, 402-rocker arm, 403-roller, 404-disc, 405-spring.

Detailed Description

When the motor has power output, the motor drives the propeller to rotate, and the airplane is driven to fly. A disk with a pit is mounted on the propeller shaft. A rocker arm controlled by an actuator is mounted on the fixed structure near the propeller. When the motor drives the propeller to normally operate, the rocker arm is jacked away from the disc by the actuator, and the rotation of the disc and the propeller is not influenced by the rocker arm. When it is desired to stop the propeller in a horizontal position, the actuator is retracted, causing the rocker arm to press against the disk under the action of the spring. When the roller on the rocker arm is pressed on the large arc section of the disc, the disc and the propeller can still rotate smoothly. When the pits of the disk run to the roller, the roller is pressed into the pits of the disk under the action of the spring, and certain resistance is generated. When the kinetic energy of the propeller is still large, the rollers are pushed out of the pits against the resistance, but this process reduces the kinetic energy of the propeller. Thereafter, a portion of the kinetic energy is dissipated for each revolution of the propeller until the propeller has insufficient kinetic energy to force the rollers out of the pockets for a period of time. The pits, the rollers and the propeller blades are designed at reasonable positions, so that the propeller can be ensured to be in a horizontal state when stopped.

If the propeller is required to decelerate more quickly, a damping element can be added at the rocker arm shaft or at the roller shaft, so that the kinetic energy of the propeller is consumed more quickly.

Claims

1. A paddle lock device (400), comprising a rocker arm shaft (401), a rocker arm (402), a roller (403), a disc (404), and a spring (405), wherein:

rocker arm pivot (401) set up on engine nacelle front end structure (1), and install on rocker arm pivot (401) the one end of rocker arm (402), and gyro wheel (403) are installed to the other end of rocker arm (402), are provided with the actuator on engine nacelle front end structure (1), the ejector pin top of actuator is on rocker arm (402), and the center department fixed mounting of disc (404) is epaxial at screw (3), and the edge of disc (404) is provided with the recess, the recess and gyro wheel (403) of disc (404) match, and gyro wheel (403) of rocker arm (402) roll along disc (404), and the one end of spring (405) is fixed on engine nacelle front end structure (1), and the other end of spring (405) is fixed on rocker arm (402).

2. The propeller locking device according to claim 1, wherein the rollers (403) engage in grooves in the disc (404) when the two blades of the propeller (3) are in a horizontal position.

3. The paddle lock device according to claim 1, wherein the other end of the rocker arm (402) is provided with a roller (403) through a rotating shaft.

4. The paddle lock device according to claim 1, wherein the rear end of the front panel of the nacelle front end structure (1) is connected to the motor (2).

5. The paddle lock device according to claim 1, wherein the ram of the actuator is pushed against the middle or the end of the rocker arm (402).

6. The paddle lock device according to claim 1, wherein two grooves are arranged at the edge of the disc (404), and the positions of the two grooves are on the same line with the center of the circle.

7. The paddle lock device of claim 1, further comprising at least one damper.

8. The paddle lock device according to claim 7, wherein the damper is arranged at a position comprising a rocker arm rotating shaft (401), a rotating shaft of a roller (403), and a spring (405).