CN114001598A

CN114001598A - Tail-rotating type actuator for bullet

Info

Publication number: CN114001598A
Application number: CN202111439781.0A
Authority: CN
Inventors: 徐润浩; 赵跃华; 江润珠
Original assignee: Jiangsu Haineng Power Technology Co ltd
Current assignee: Jiangsu Haineng Power Technology Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-02-01

Abstract

The invention relates to the field of missile flight attitude control, in particular to a tail rotary actuator for a missile capable of guiding and flying. A miniature high-speed DC motor is arranged in a metal shell with the diameter smaller than that of the warhead, an output shaft is connected with a small speed reducer, and a tail shaft is driven to rotate by an output shaft of the speed reducer. A small magnet magnetized in the radial direction is arranged at the head of the motor and used for reflecting the speed and the moving direction of the motor, and an encoder is arranged at the end part of the metal shell and used for transmitting power supply and moving speed and direction commands to the motor and receiving the rotating speed and the position state of the motor reflected by the magnet. The encoder transmits a motion control signal to the motor and collects the running state of the motor, the reducer transmits the high-speed motion of the motor to the tail shaft to perform low-speed rotation motion, and then provides a rotation torque for changing the motion direction for the projectile body, changes the flight direction of the projectile body, enables the projectile body to move into a guidable state, and improves the striking precision.

Description

Tail-rotating type actuator for bullet

Technical Field

The invention relates to the field of control of flight attitudes for bombs, in particular to a tail rotary actuator for a guided flight bomb.

Background

Actuators for changing the attitude of an object are often used in industrial equipment and aircraft. The motion mode of the actuators is basically that a motor is combined with a speed reducer and a push rod, and the rotation motion of the motor is changed into linear reciprocating motion through the push rod. Such as elevators for lifting objects; the equipment such as a steering engine and the like for changing the flight attitude when the airplane and the guided missile fly are all actuators adopting the linear reciprocating motion mode. Generally, the actuator cannot be used for attitude control of small-volume rotating objects, such as small-caliber low-cost projectiles like cannonballs, rocket projectiles, sniper projectiles and the like.

Disclosure of Invention

In order to improve the hit precision of small ammunition and realize accurate guidance of low-cost ammunition, the invention provides a tail rotary actuator as a projectile body flight reversing device, which is used for changing the flight attitude of a projectile body in the guidance process and improving the hit precision.

The technical scheme adopted by the invention is as follows: in a metal shell whose diameter is less than that of warhead a miniature high-speed D.C. motor is mounted, in order to raise rotating torque of tail wing of bullet body the output shaft of said motor is connected with a small speed reducer, and the output shaft of said speed reducer can be used for driving tail shaft to rotate, said tail shaft and bullet shell are connected by means of a rolling bearing and a plane bearing so as to ensure the concentricity of tail shaft and motor shaft when the tail shaft is rotated. The tail wing is connected with the tail shaft through the screw thread at the upper tail end of the tail shaft.

In order to control the speed and the moving direction of the motor, a Hall element circuit cannot be installed in the motor to monitor the speed and the moving direction of the motor based on the limitation of the volume of the motor, so that the motor is a double-output-shaft brush direct current motor. The encoder for driving/collecting motor signal is mounted on the end of metal shell body, and is used for supplying power supply and moving speed and direction instruction to motor, and simultaneously receiving the motor rotation speed and position state data.

The invention has the advantages that the motion control signal is transmitted to the motor through the encoder and the running state of the motor is collected. When the motor moves, the high-speed movement of the motor is transmitted to the tail shaft through the speed reducer to be in low-speed rotation movement, then the rotating torque for changing the movement direction is provided for the projectile body, the movement direction of the projectile body is changed, the projectile body moves to be in a guidable state, and the striking precision is improved.

Drawings

FIG. 1 is a perspective semi-sectional view of an embodiment of the present invention.

Fig. 2 is a schematic perspective view of an embodiment of the present invention.

In the figure: 1. an encoder; 11. a connector; 12. a circuit board; 13. a chip; 2. a magnet; 3. a miniature high-speed direct current motor; 4. a speed reducer; 5. a bearing; 6. a tail shaft; 7. a rolling bearing fitting surface; 8. a planar bearing mating surface; 9. a housing.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following specific examples are merely illustrative of the invention and are not to be construed as limiting the invention.

As shown in fig. 1, an embodiment of the present invention provides a tail-spin actuator for a projectile, including an encoder 1, a magnet 2, a micro high-speed dc motor 3, a speed reducer 4, a bearing 5, a tail shaft 6, a rolling bearing mating surface 7, a planar bearing mating surface 8, and a housing 9; the encoder 1 comprises a connector 11, a circuit board 12 and a chip 13; an output shaft of the motor 3 is connected with a speed reducer 4, and an output shaft of the speed reducer 4 drives a tail shaft 6 to rotate; the tail shaft 6 is connected with the cartridge case through a rolling bearing matching surface 7 and a plane bearing matching surface 8, and the tail wing of the cartridge case is connected with the tail end of the tail shaft 6 through threads.

The tail-spin actuator for the missile is characterized in that in order to control the speed and the moving direction of the motor 3, a Hall element circuit cannot be installed in the motor 3 to monitor the speed and the moving direction of the motor based on the limitation of the volume of the motor, so that the motor 3 is a double-output-shaft brush direct current motor.

The tail-spin actuator for the bullet is characterized in that a magnet 2 arranged on a shaft-out part of the head of a motor 3 is a small magnet which is magnetized in the radial direction and is used for reflecting the speed and the moving direction of the motor 3.

The tail-spin actuator for the missile is characterized in that an encoder 1 for driving/collecting motor signals is arranged at the end part of a metal shell 9 and used for transmitting power supply and movement speed and direction instructions to a motor 3 and receiving the rotation speed and position state of the motor reflected by a magnet 2.

The tail-spin actuator for the projectile is characterized in that a motion control signal is transmitted to the motor 3 through the encoder 1 and the running state of the motor is collected; when the motor 3 moves, the high-speed movement of the motor 3 is transmitted to the tail shaft 6 through the speed reducer 4 to be in low-speed rotation movement, the wind resistance is utilized to provide rotation torque for changing the movement direction for the projectile body, the flight direction of the projectile body is changed, the projectile body moves to be in a guidable state, and the striking precision is improved.

Claims

1. A tail rotary actuator for bullets comprises an encoder, a magnet, a miniature high-speed direct current motor, a speed reducer, a bearing, a tail shaft, a rolling bearing matching surface, a plane bearing matching surface and a shell; the encoder comprises a connector, a circuit board and a chip; an output shaft of the motor is connected with a speed reducer, and an output shaft of the speed reducer drives a tail shaft to rotate; the tail shaft is connected with the shell through a matching surface of the rolling bearing and a matching surface of the plane bearing, and the tail wing of the projectile body is connected with the tail end of the tail shaft through threads.

2. The projectile motion tailing actuator as defined in claim 1 wherein, to control the motor speed and direction of motion, hall element circuitry cannot be installed inside the motor to monitor the motor speed and direction of motion based on motor volume limitations, whereby the motor is a dual output shaft brushed dc motor.

3. The projectile motion tailing actuator as defined in claim 1 wherein the encoder for driving/collecting motor signals is mounted at the end of the metal casing for supplying power to the motor and speed and direction commands as well as receiving the speed and position of the motor as reflected by the magnets.

4. The tail-spin actuator as claimed in claim 1, wherein the motor transmits the high-speed motion of the motor to the tail shaft through the speed reducer to rotate at a low speed during the motion, and the wind resistance provides a rotational moment for changing the motion direction of the projectile body to change the flight direction of the projectile body, so that the projectile body can move in a guidance state and the striking precision is improved.