KR102214443B1 - Apparatus for fixing neutral position of wings of projectile and projectile comprising thereof - Google Patents

Abstract

According to one embodiment, an apparatus for fixing a neutral position of a wing of a projectile includes: a rotation driving shaft connected with a wing which can be rotated to a module housing, to be rotated together with the wing; and a driving source connected with the rotation driving shaft, and including a rotor which can be rotated together with the rotation driving shaft. The rotation driving shaft includes: a wing rotation shaft connected directly with the wing to be rotated together with the wing; a pin connection rotation shaft connected with the wing rotation shaft to be slidable; a shaft connection pin fixed to an end of the pin connection rotation shaft; and a spring placed between the shaft connection pin and the wing rotation shaft to provide an elastic force leading the shaft connection pin to be projected toward the rotor. The rotor can include a frame having a shaft connection groove.

Description

A wing neutral position fixing device and a projectile including the same TECHNICAL FIELD [APPARATUS FOR FIXING NEUTRAL POSITION OF WINGS OF PROJECTILE AND PROJECTILE COMPRISING THEREOF}

The following description relates to a wing neutral position fixing device and a projectile including the same.

In the modern war environment, as combatants are required to improve their survival and mission capabilities, it is necessary to develop small tactical guided weapons that can be carried by each combatant. The development of small-sized tactical guided weapons at home and abroad centers on miniaturization of guided missiles. However, the development of microscopic guided missiles that can be carried by individual combatants or mounted on unmanned aerial vehicles such as small drones has not reached the completion stage.

One of the biggest technical barriers to miniaturization of guided missiles is the miniaturization of the guided missile wing drive. In the case of a normal guided missile, the space and weight allocated to the drive system are limited because the searcher, navigation sensor, guidance control device, propellant, and battery are components in addition to the wing drive system. However, even in the case of a miniaturized guided missile, all of the above-described components must be provided, and thus the space and weight limitations of the driving device are further increased. On the other hand, regardless of these spatial and weight restrictions, design requirements such as drive displacement, maximum output torque, and maximum output angular velocity of a driving device mounted on a guided missile are determined according to the operating concept and guidance technique of the guided missile. Therefore, the driving system must be designed to satisfy the design requirements even within the space and weight limitations, and if this design requirement is not satisfied, the driving system will conversely affect the operating concept and guided control technique of the guided missile. .

In general, the smaller the guided missile is, the higher the output efficiency is compared to the space-weight and the easier the controllable electric drive is applied. The electric drive is basically composed of a motor that generates power, a reducer or link structure that transmits power, a position sensor that measures rotational displacement, and a current controller that controls the current. In order to satisfy design requirements in consideration of the spatial and strategic limitations of the driving device, the configuration of the electric driving device may vary.

In general, electric drive systems applied to small guided missiles use a rotary BLDC motor and a power transmission unit such as a ball screw/lead screw. BLDC motors have the advantage that the output to space is higher than that of DC motors and control is easy. In addition, linear reducers such as ball screws have high energy transfer efficiency and mechanically disperse external forces such as wind acting on the blades, thereby increasing the stability of the drive system control system. And, in the case of a position sensor, it is generally easier to secure an absolute angle than an encoder, and a potentiometer with a simple peripheral device configuration is used. In the case of this potentiometer, it is attached to the rotor blades using gears to increase the resolution of the potentiometer in consideration of the maximum driving displacement of the blade. The control method of the driving device is determined according to the guidance technique. In particular, in the case of a guided missile aiming and firing a target, the driving device performs control to maintain a specific angle from external forces such as wind from launch to ballistic flight.

The above-described background technology is possessed or acquired by the inventor in the process of deriving the present invention, and is not necessarily a known technology disclosed to the general public prior to filing the present invention.

In the projectile control system, brake operation is required at the initial stage of launch.In the case of general brakes, active actuators and drive controllers are separately required, which reduces space utilization, and additional manufacturing costs and efforts to perform control Is required. Therefore, it is intended to provide a wing neutral position fixing device that mechanically and physically fixes the wings of a projectile, without incurring such cost and effort.

According to an embodiment, the wing neutral position fixing device includes: a module housing; Blades rotatable with respect to the module housing; A drive source including a rotor rotatable with respect to the module housing; And (i) maintaining a state separated from the rotor in the initial position, and (ii) when the rotor is rotated to a set position, it is coupled to the rotor to transmit the power received from the driving source to the blades. Can include.

The rotation drive shaft maintains a state fixed to the module housing in an initial position, and may be separated from the module housing when the rotor is rotated to the set position.

When the rotation drive shaft is rotated to the set position, a portion of the rotation drive shaft elastically protrudes to be coupled to the rotor.

The rotation drive shaft is directly connected to the blade, the blade rotation shaft capable of rotating integrally with the blade; A pin connection rotation shaft slidably connected to the blade rotation shaft; A shaft connection pin fixed to an end of the pin connection rotation shaft; And a spring providing an elastic force for causing the shaft connection pin to protrude toward the rotor, and the rotor may include a frame having a portion into which the shaft connection pin is inserted.

The shaft connection pin may include a pin body; And a pin blade protruding from the pin body, wherein the rotor includes a shaft connection groove, and the shaft connection groove is formed on the frame and includes a body groove into which the pin body is inserted; And a wing groove formed on the frame and into which the pin wing can be inserted.

The module housing may include a fin blade receiving portion capable of accommodating the fin blade; And a fixed shaft that can accommodate the pin body.

When the fin body is accommodated in the fixed shaft and the fin blades are accommodated in the fin blade accommodating part, when the rotor is rotated at a specific angle so that the blade groove and the fin blade are aligned with each other, the shaft connection pin By protruding from the fixed shaft and the pin blade receiving portion and being inserted into the shaft connection groove, the shaft connection groove and the shaft connection pin can be mated.

The module housing may include a first fin blade receiving portion capable of accommodating the fin blades, and the rotation drive shaft may further include a second fin blade receiving portion capable of accommodating the fin blades.

In a state in which the fin body is accommodated in the blade rotation shaft and the fin blades are accommodated in the first fin blade receiving portion and the second fin blade receiving portion, the rotor is rotated at a specific angle, and the blade groove and the fin blade When are aligned with each other, the shaft connection pin protrudes from the first pin wing receiving portion and the second pin wing receiving portion and is inserted into the shaft connection groove, so that the shaft connection groove and the shaft connection pin You can match this.

According to an embodiment, the wing neutral position fixing device includes: a module housing; Blades rotatable with respect to the module housing; A drive source including a rotor rotatable with respect to the module housing; And a blade rotation shaft connected to the blades to transmit power to the blades. And a shaft connection pin that is slidable with respect to the blade rotation shaft and physically coupled or detachable to the rotor.

In the module housing, a first fin blade receiving portion is formed to receive the fin blade of the shaft connection pin to restrict the rotation of the shaft connection pin, and the blade rotation shaft includes a fin blade of the shaft connection pin By receiving, a second fin wing receiving portion for restraining the rotation of the shaft connection pin is formed, the fin wing is accommodated in both the first fin wing receiving portion and the second fin wing receiving portion, the wing It is possible to prevent the rotation shaft from rotating with respect to the module housing.

In the module housing, a pin blade receiving portion for accommodating the pin blades of the shaft connection pin is formed to restrict the rotation of the shaft connection pin, and the blade rotation shaft is non-rotatable with respect to the shaft connection pin. By being connected, when the fin blade is accommodated in the fin blade receiving part, the blade rotation shaft may not be able to rotate with respect to the module housing.

According to an embodiment, a projectile is a fuselage; A module housing mountable in the body; Blades rotatable with respect to the fuselage; A rotation drive shaft connected to the wing and integrally rotated with the wing; And a drive source including a stator fixed to the module housing and a rotor connected to the rotation drive shaft and rotated integrally with the rotation drive shaft, wherein the rotation drive shaft is not rotated with respect to the module housing. It is separated from the former and can be coupled to the module housing, and is then connected to the rotor as the rotor rotates, and may not be separated from the rotor after being connected.

The device for fixing a neutral position of a projectile wing according to an embodiment may minimize energy consumption of a guided missile by maintaining a specific angle from initial launch, which is a main operating section of the guided missile driving device, to ballistic flight. Since the manual fixing device of the present invention is operated manually, there is no separate energy consumption, energy efficiency is maximized, and space and cost can be saved.

1 is a view showing a projectile according to an embodiment.
2 is a perspective view of a driving module according to an embodiment.
3 is a perspective view illustrating a state in which a part of a housing is cut out of a driving module according to an exemplary embodiment.
4 is a diagram illustrating an operation of a driving module according to an exemplary embodiment.
5 is a view showing a bundle of windings and a lower permanent magnet according to an embodiment.
6 is a view showing an upper permanent magnet and a lower permanent magnet according to an embodiment.
7 is a diagram illustrating an operation of a rotation angle sensor according to an exemplary embodiment.
8 is a block diagram of a system including a driving module and a controller according to an exemplary embodiment.
9 is a partial exploded perspective view of a driving module according to an exemplary embodiment.
10 is a view showing a fixed maintenance state and a release state of the wing according to an embodiment.
11 is a view showing a blade neutral position fixing device according to an embodiment.
12 is a cross-sectional view taken along the cut line II of FIG. 11.
13 is a view showing a blade neutral position fixing device according to another embodiment.

Hereinafter, embodiments will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing the embodiment, if it is determined that a detailed description of a related known configuration or function interferes with the understanding of the embodiment, a detailed description thereof will be omitted.

In addition, in describing the constituent elements of the embodiment, terms such as first, second, A, B, (a) and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. When a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but another component between each component It should be understood that may be “connected”, “coupled” or “connected”.

Components included in one embodiment and components including common functions will be described using the same name in other embodiments. Unless otherwise stated, the description in one embodiment may be applied to other embodiments, and a detailed description will be omitted in the overlapping range.

FIG. 1 is a view showing a projectile according to an embodiment, FIG. 2 is a perspective view of a driving module according to an embodiment, and FIG. 3 is a perspective view showing a partially cutaway view of a housing among driving modules according to an embodiment. .

1 to 3, the projectile 10 may include a fuselage 2 and a driving module 1. The driving module 1 may guide the projectile 10 in the direction of the target or determine a route by receiving an electric signal from the guidance control device. For example, the driving module 1 includes a first driving module 1b disposed at the rear of the body 2 and having a first wing 11b, and a first driving module 1b disposed in front of the first wing 11b. It may include a second driving module (1a) having two blades (11a). Here, the second wing 11a may include an ear wing (Canad). On the other hand, the above description is only one example, unless there is a description to the contrary, the location and type of the driving modules (1a, 1b) and the wings (11a, 11b) are not limited. Hereinafter, the first drive module 1b and the second drive module 1a are collectively referred to as “drive module 1”, and the first wing 11b and second wing 11a are collectively referred to as “wings 11”. To The drive module 1 may include a blade 11, a module housing 12, a rotation drive shaft 13, a drive source 14, a rotation angle sensor 15, and a control unit (not shown). Meanwhile, the above-described blade 11, module housing 12, rotation drive shaft 13, and drive source 14 may be collectively referred to as "a blade neutral position fixing device".

The module housing 12 may be mounted in the body 2 and may contain a driving source 14 and a rotation angle sensor 15. On the other hand, the module housing 12 may be understood as constituting a part of the body 2.

The rotation drive shaft 13 is disposed to pass through the module housing 12 and may be rotated with respect to the module housing 12. The rotation drive shaft 13 may be connected to the blade 11 and rotate integrally with the blade 11. For example, the blade 11 and the rotation drive shaft 13 may perform one rigid body motion. According to this structure, when the rotation drive shaft 13 rotates, the rotation drive shaft 13 and the blade 11 may rotate with respect to the fixed module housing 12. Meanwhile, the blade 11 and the rotation drive shaft 13 may be directly connected without a reducer intervening in the middle. As described later, the rotation drive shaft 13 is (i) coupled to the rotor 142 to transmit the rotational force of the rotor 142 to the blades 11, or (ii) separated from the rotor 142 to provide a module housing. By coupling to (12), it is possible to maintain the state not rotated relative to the module housing (12).

The drive source 14 may provide power for rotating the blade 11. For example, the drive source 14 may not be equipped with a reducer. By omitting the bulky reducer, the volume of the drive source 14 can be reduced. In addition, when power is transmitted, as shown in FIG. 8, there is no problem of backlash (backlash1) generated in a speed reducer provided in a normal gear structure, so control is easy. The drive source 14 may include a stator 141 and a rotor 142.

The stator 141 may be fixed to the module housing 12. For example, the stator 141 may include an upper permanent magnet 1411 fixed to the module housing 12 and a lower permanent magnet 1412 fixed to the module housing 12.

The rotor 142 is a portion that is rotated with respect to the stator 141 and is connected to the rotation drive shaft 13 and may be rotated integrally with the rotation drive shaft 13. For example, the rotor 142 includes a bundle of windings 1421 for guiding current to flow in a direction perpendicular to a line of magnetic force formed between at least a portion of the upper permanent magnet 1411 and the lower permanent magnet 1412, and A frame 1422 may be connected to the bundle 1421 and rotated integrally with the winding bundle 1421. According to this structure, the rotor 142 may reciprocate in an arc direction by the force of Lorentz between the upper permanent magnet 1411 and the lower permanent magnet 1412.

The rotation angle sensor 15 may detect the rotation angle of the blade 11. For example, the rotation angle sensor 15 may provide information for calculating a rotation angle at which the movement direction of the projectile is directed toward the target direction.

The controller may control the rotation angle of the blade 11 by receiving information on the rotation angle of the blade 11 through the rotation angle sensor 15 and controlling the driving source 14.

The driving module 1 including the above-described structure may include a plurality of blades 11. For example, when the drive module 1 includes two wings 11 on both sides, one module housing 12 has a rotation drive shaft 13, so that the two wings 11 can be controlled. Two driving sources 14 and two rotation angle sensors 15 may be provided. For example, two assemblies each including a blade 11, a rotation drive shaft 13, a drive source 14, and a rotation angle sensor 15 will be symmetrically disposed on both sides with respect to the center of the module housing 12. I can.

4 is a view showing the operation of a driving module according to an embodiment, FIG. 5 is a view showing a bundle of windings and a lower permanent magnet according to an embodiment, and FIG. 6 is a permanent upper magnet and a permanent lower panel according to an embodiment. It is a diagram showing a magnet.

First, referring to FIG. 4, when a current flows through the winding bundle 1421 located between the upper permanent magnet 1411 and the lower permanent magnet 1412, the rotation direction may vary according to the current direction.

The upper permanent magnet 1411 and the lower permanent magnet 1412 may have different magnetic poles formed on surfaces facing each other. For example, based on the direction shown in FIG. 6, when the upper permanent magnet left portion 14111 is the S pole and the upper permanent magnet right portion 14112 is the N pole, the lower permanent magnet left portion 14121 is the N pole, The right portion 14122 of the lower permanent magnet may be an S pole. The magnetic force line is formed in a vertical direction between the upper permanent magnet 1411 and the lower permanent magnet 1412, and the directions of the magnetic force lines may be different from each other at the left and right portions of the permanent magnet.

4 and 5, the winding bundle 1421 may have a fan shape in which a cavity is formed in the center. The winding bundle 1421 may include a pair of radial coil units 14211 and a pair of arc direction coil units 14212. For example, the pair of radial coil units 14211 may be disposed along a direction away from the rotation drive shaft 13. The pair of arc direction coil units 14212 are positioned at a predetermined distance with respect to the rotation drive shaft 13, and may interconnect the pair of radial direction coil units 14211.

In a state in which the polarities of the upper permanent magnet 1411 and the lower permanent magnet 1412 are formed as shown in the drawing, as shown in Fig. 4 (a), when a counterclockwise current flows through the winding bundle 1421, one The left side and the right side of the pair of radial coil units 14211 generate torque to rotate counterclockwise by electromagnetic force. As shown in (b) of FIG. 4, when a current in a clockwise direction flows through the winding bundle 1421, the left and right portions of the pair of radial coil units 14211 all generate torque to rotate clockwise by electromagnetic force. do. According to such a structure, by changing the direction of the current flowing through the winding bundle 1421, the rotation direction of the rotation drive shaft 13 can be changed.

According to this structure, the module housing 12 (refer to FIG. 3), the permanent magnet upper plate 1411 and the permanent magnet lower plate 1412 do not move, and the rotor 142, the rotation drive shaft 13 and the blade 11, 3) is rotated, so that the wing 11 is integrally connected with the driving source 14 to control the movement direction of the projectile 10 (see FIG. 1) in a direct driving manner.

Meanwhile, the module housing 12 (refer to FIG. 2) may further include a resistance fluid located in a space other than the space occupied by the winding bundle between the upper permanent magnet 1411 and the lower permanent magnet 1412. According to the resistance fluid, as a disadvantage of the direct drive type driving module 1, a problem that is excessively sensitive to disturbance can be reduced. For example, the resistance fluid may be a fluid obtained by mixing a magnetic fluid and a nonmagnetic fluid. The magnetic fluid may increase or decrease a torque for driving by reducing a loss of a magnetic field leaking into the air gap. Accordingly, it is possible to output as much torque as required by the drive module. For example, the non-magnetic fluid may be a fluid having a higher viscosity than the magnetic fluid. For example, the mixing ratio of the magnetic fluid and the non-magnetic fluid can be adjusted by varying the ratio according to the predicted frictional force calculated through the driving module motion simulation in advance, thereby adjusting the viscous friction of the rotor 142. have. A mechanism for the effect of viscous friction on the output will be described later in the description of FIG. 8.

Meanwhile, as shown in FIG. 5, in a state in which the rotor 142 is rotated to the maximum to the left, the radial coil part located on the left of the pair of radial coil parts 14211 overlaps the left part 14121 of the lower permanent magnet. And, the radial coil part located on the right side may overlap the right part 14122 of the lower permanent magnet. According to such a structure, since a pair of radial coil units 14211 through which currents in different directions flow from each other are located in a magnetic field in the same direction, a problem in which the rotor 142 is not rotated can be prevented. . Likewise, when the rotor 142 is rotated to the right to the maximum, the radial coil part located on the right of the pair of radial coil parts 14211 overlaps the right part 14122 of the lower permanent magnet, and is located on the left. The radial coil part may overlap the left part 14121 of the lower permanent magnet.

For example, in a state in which the rotor 142 is rotated to the maximum to the left, the radial coil part 14211 located on the right does not overlap with the left part 14121 of the lower permanent magnet, and the rotor 142 is on the right. In the state rotated to the maximum, the radial coil portion positioned on the left side may not overlap with the right portion 14122 of the lower permanent magnet. According to this structure, since it is possible to prevent electromagnetic forces in different directions from being applied to the pair of radial coil units 14211, it is possible to minimize a torque loss problem.

Meanwhile, as shown in FIG. 6, the upper permanent magnet 2411 and the lower permanent magnet 2412 may be formed by arranging divided pieces into a plurality of pieces, respectively. Compared to the non-divided upper permanent magnet 1411 and lower permanent magnet 1412, the upper permanent magnet 2411 and lower permanent magnet 2412, which are divided into a plurality of pieces and then combined, reduce eddy current to reduce current loss, and magnetic flux density. Can be made uniform, and accordingly, the output compared to the size of the driving source 14 (refer to FIG. 3) can be increased.

7 is a diagram illustrating an operation of a rotation angle sensor according to an exemplary embodiment.

Referring to FIG. 7, the rotation angle sensor 15 is for detecting the rotation angle of the blade 11, and a pair of resistors 151, a brush 152, a brush arm 153, and a substrate 154 And a potentiometer.

A pair of resistors 151 may be formed on a substrate 154 made of an insulating material installed in the module housing 12 (refer to FIG. 2 ).

The potentiometer is connected to the pair of resistors 151, respectively, and by measuring the applied voltage, the rotation angle of the blade 11 can be measured.

The brushes 152 may be connected to a pair of resistors 151 and a pair of resistors 151, respectively. For example, a plurality of contact points may be provided at the ends of the brush 152. Since the contact point is formed in multiples, noise that may occur during measurement can be minimized.

The brush arm 153 may connect the brush 152 and the rotation drive shaft 13 to each other, so that the brush 152 and the rotation drive shaft 13 perform one rigid body motion. According to this structure, in other words, since the rotation angle sensor 15 does not include a reducer, it is possible to prevent the occurrence of backlash 2 as shown in FIG. 8.

According to the above structure, the rotation angle sensor 15 may measure a potential difference through a potentiometer within a rotation driving range according to the maximum rotation angle of the blade 11 and detect the rotation angle of the blade 11 based on this. For example, as shown in (a) of FIG. 7, when the blade 11 is driven to the maximum in the counterclockwise direction, the measured voltage of the potentiometer may be the minimum value. As shown in (b) of FIG. 7, when the blade 11 is driven to the maximum in the clockwise direction, the measured voltage may be the maximum value.

8 is a block diagram of a system including a driving module and a controller according to an exemplary embodiment.

As described with reference to FIG. 8, the direct drive type drive module 1 with the reducer removed has a high sensitivity to disturbances such as wind, and thus has a problem that is difficult to apply in practice. However, as in the embodiment, magnetic fluid and nonmagnetic fluid are used. This problem can be solved by using a mixed resistance fluid. For a system including the driving module 1 and a controller, the input vs. output and the disturbance vs. output are formulated as follows.

here,

G _ro : Transfer function of output angle compared to input command

G _c : Transfer function of driving voltage controller

G _e : Transfer function of electric motor model

G _m : Transfer function of the mechanical model of the motor

H: transfer function of sensor model

here,

G _do : Transfer function of output angle versus disturbance

here,

K _a : torque constant

L _a : winding inductance

R _a : winding resistance

here,

J: Total moment of inertia of the driving module

b: Total viscous friction of the rotating part of the drive module

In small- and medium-sized or more electric motor only in the electrical model, the G _e response faster than G _m, because the drive device is miniaturized the more it reduces the decrease in the mechanical model J and b times the square than the decrease in the R _a and L _a electrical model G _m There is no guarantee that the response of is slower than G _e . For this reason, the output transfer function versus disturbance according to [Equation 1] is difficult to be negligibly small. Which raise the G _c or kiwoseo the b can be compensated system There viscosity of the magnetic fluid and the non-magnetic fluid resistance fluid mix described in Figure 4 by increasing the viscous friction b of G _m by increasing the damping of the system G _do It serves to reduce the impact of And the decrease in response of G _ro due to the increased friction can be compensated by increasing the torque constant K- _a through the magnetic fluid. Applying this, if the driving force is insufficient despite the low disturbance sensitivity due to the large friction value calculated after the system design, if the fluid mixed with the magnetic fluid is made by adopting the low viscosity of the nonmagnetic fluid, the rotating part is made smoother and b is lowered. I can.

Since the speed reducer is not used for power transmission and rotational displacement measurement, backlash does not occur at the two backlash generation points in the control block diagram of FIG. 8. This plays a role in reducing the nonlinearity of the control system and improving the control performance.

9 is a partial exploded perspective view of a driving module according to an exemplary embodiment, and FIG. 10 is a view showing a state of holding and releasing a wing fixed according to an exemplary embodiment.

9 and 10, the rotation drive shaft 13 maintains a state separated from the rotor 142 at the initial position, and is coupled to the rotor 142 when the rotor 142 is rotated to the set position. As a result, the power transmitted from the drive source 14 can be transmitted to the wing 11. That is, the rotation drive shaft 13 may be kept fixed to the module housing 12 at the initial position, and may be separated from the module housing 12 when the rotor 142 is rotated to the set position.

First, as shown in (a) of Figure 10, so that the rotation drive shaft 13 is not rotated with respect to the module housing 12, the rotation drive shaft 13 is separated from the rotor 142 and is attached to the module housing 12. Can be combined.

Next, as shown in (b) of FIG. 10, when the rotor 142 is rotated to the set position, a portion of the rotation drive shaft 13 is elastically protruded and can be coupled with the rotor 142. . After the rotation drive shaft 13 is connected to the rotor 142, the rotation drive shaft 13 may not be separated from the rotor 142 by an elastic force unless an external force is applied.

For example, the rotation drive shaft 13 may include a spring 131, a pin for shaft connection 132, a pin connection rotation shaft 133, and a blade rotation shaft 134.

The spring 131 may be disposed between the shaft connection pin 132 and the blade rotation shaft 134 to provide an elastic force that causes the shaft connection pin 132 to protrude toward the rotor 142. For example, the spring 131 may have a shape surrounding the pin connection rotation shaft 133.

The blade rotation shaft 134 is directly connected to the blade 11 and may transmit power to the blade 11. For example, the blade rotation shaft 134 may rotate integrally with the blade 11.

The pin-connected rotation shaft 133 is slidable in the axial direction with respect to the blade rotation shaft 134, but may be rotated at the same angle as the blade 11 in the axial circumferential direction. For example, the pin-connected rotation shaft 133 cannot rotate with respect to the blade rotation shaft 134, and may only slide along the rotation axis direction.

The shaft connection pin 132 is a portion fixed to the end of the pin connection rotation shaft 133, and may have a structure that can be fitted to the rotor 142. For example, the pin 132 for shaft connection may include a pin body 1321 and a pin wing 1322 protruding outward from the center.

The module housing 12 may include a fixed shaft 121. The fixed shaft 121 is a portion that does not move with respect to the module housing 12 like the stator 141, and may have a structure capable of being mated to the shaft connection pin 132. As shown in (a) of FIG. 10, when the pin 132 for shaft connection is coupled to the fixed shaft 121, the pin 132 for shaft connection and the wing 11 connected thereto are attached to the module housing 12. May not be rotated against. Such a state can be referred to as "the state of holding the wing fixed".

The frame 1422 may include a groove 14221 for shaft connection. For example, the shaft connection groove 14221 may have a structure that can be mated to the shaft connection pin 132. As shown in (b) of Figure 10, when the shaft connection pin 132 is coupled to the shaft connection groove 14221, the shaft connection pin 132 and the blade 11 connected thereto are the rotor 142 ) Can be rotated. Such a state may be referred to as "the state of releasing the fixed blades". According to this structure, the state of the blade 11 can be changed depending on whether the pin connection rotation shaft 133 is coupled to either of the fixed shaft 121 and the shaft connection groove 14221. The shaft connection groove 14221 may be formed on the frame 1422. The shaft connection groove 14221 includes a body groove 14221a into which the pin body 1321 can be inserted, and a wing groove 14221b formed on the frame 1422 and into which the pin wing 1322 can be inserted. Can include.

In the state where the blades are fixed and maintained as shown in FIG. 10A, the initial position is mechanically fixed without a separate active brake, so that power consumption for driving the blades 11 can be minimized. In other words, the rotation drive shaft 13 and the blade 11 may be in a fixed state that does not rotate with respect to the module housing 12 and the fixed shaft 121. For example, it is necessary to keep the angle of the wing 11 constant in the initial state of launch. Therefore, in a state where the spring 131 is compressed so that the shaft connection pin 132 is coupled to the fixed shaft 121, the shaft connection pin 132 is not inserted into the shaft connection groove 14221, the rotor By rotating the 142 at a specific angle and displacing it from each other, such a blade holding state can be achieved.

However, it is necessary to control the angle of the wing 11 at the point of starting guided maneuvering, past the step of maintaining the angle of the wing 11 at the beginning of the launch of the projectile 10 (refer to FIG. 1) such as a guided missile. Specifically, when the rotor 142 is rotated at a specific angle so that the shaft connection groove 14221 and the shaft connection pin 132 are aligned with each other, the blades shown in (b) of FIG. 10 may be released. . For example, when the rotor 142 is rotated at a specific angle so that the shaft connection groove 14221 and the shaft connection pin 132 are aligned with each other, the shaft is connected by the elastic restoring force of the spring 131 The for pin 132 protrudes, and the shaft connection pin 132 is inserted into the shaft connection groove 14221, so that the shaft connection groove 14221 and the shaft connection pin 132 can be mated. Accordingly, the rotation drive shaft 13 and the blade 11 may be in an unlocked state capable of rotating with respect to the module housing 12 and the fixed shaft 121. That is, the rotation drive shaft 13 and the frame 1422 are connected, so that the blade 11, the rotation drive shaft 13, and the frame 1422 may be integrally rotated.

Controlling the wing 11 so that a specific position is maintained from the initial launch requires a lot of energy, so operation is limited in a small guided missile, but according to this structure, electrical control can be performed at the time when control is required, It's efficient.

11 is a view showing a blade neutral position fixing device according to an embodiment, and FIG. 12 is a cross-sectional view taken along the cut line I-I of FIG. 11.

11 and 12, the module housing 12 is engaged with the rotation drive shaft 13, so that the rotation drive shaft 13 does not rotate with respect to the module housing 12, so that the rotation drive shaft 13 can be fixed. have. For example, the module housing 12 has a fixed shaft 121 capable of accommodating the pin body 1321 and a pin capable of restraining the rotation of the shaft connection pin 132 by accommodating the pin blade 1322 It may include a wing receiving portion 122.

When the pin body 1321 is accommodated in the fixed shaft 121 and the pin blade 1322 is accommodated in the fin blade receiving portion 122, the shaft connection pin 132 cannot be rotated with respect to the module housing 12 Becomes. In addition, for example, as shown in FIG. 12, on the outer surface of the pin connection rotation shaft 133 and the inner surface of the blade rotation shaft 134, protrusions and grooves that are spaced apart along the axial direction and match each other may be formed. According to this structure, the blade rotation shaft 134 is in a state in which rotation is impossible with respect to the shaft connection pin 132, and as a result, the blade rotation shaft 134 is in a state in which rotation is impossible with respect to the module housing 12 (wing Can be a fixed holding state

On the other hand, when the rotor 142 is rotated at a specific angle, and the wing groove (14221b (see FIG. 9)) and the pin wing (1322) are aligned with each other, the pin 132 for shaft connection is the fixed shaft 121 and the pin wing It protrudes from the receiving portion 122 and may be inserted into the shaft connection groove 14221 (see FIG. 9). Accordingly, the shaft connection groove 14221 and the shaft connection pin 132 are joined to each other, so that the blade rotation shaft 134 can be controlled (the blade is released).

13 is a view showing a blade neutral position fixing device according to another embodiment.

Referring to FIG. 13, a blade neutral position fixing device according to another exemplary embodiment may include a blade, a module housing 22, a rotation drive shaft 23, and a driving source. The rotation drive shaft 23 may include a spring 231, a pin 232 for shaft connection, a pin connection rotation shaft 233, and a blade rotation shaft 234. The pin 232 for shaft connection may include a pin body 2321 and a pin wing 2322.

As shown in FIG. 13, the fixed shaft 121 as described in FIG. 11 is not formed in the module housing 22, and the rotation drive shaft 23 may be disposed to pass through the module housing 22. Further, in the module housing 22, a first fin blade receiving portion 222 for accommodating the fin blade 2322 to restrict the rotation of the shaft connection pin 232 is formed, and similarly, the blade rotation shaft 234 In addition, a second fin blade receiving portion 235 for accommodating the fin blade 2322 to restrict the rotation of the shaft connection pin 232 may be formed. According to this structure, the shaft connection pin 232 is fitted to both the module housing 22 and the blade rotation shaft 234, so that the blade rotation shaft 234 cannot rotate relative to the module housing 22 (the blade is fixed. It can be a gist state). According to this structure, compared to the above-described embodiment, the structure of the protrusions and grooves as shown in FIG. 12 is not required to be applied.

On the other hand, when the rotor 142 (refer to FIG. 9) is rotated at a specific angle, and the wing groove (14221b (refer to FIG. 9)) and the pin wing 2322 are aligned with each other, the pin for shaft connection 232 is the wing rotation shaft 234 ) After being accommodated in the interior, the first pin wing receiving portion 122 of the module housing 22 and the second pin wing receiving portion 235 of the wing rotating shaft 234 protrude from the groove for shaft connection 14221, 9) can be inserted into. Accordingly, the shaft connection groove 14221 and the shaft connection pin 232 are joined to each other, so that the blade rotation shaft 234 can be controlled (the blade is unlocked).

As described above, although the embodiments have been described by the limited drawings, various modifications and variations are possible from the above description to those of ordinary skill in the art. For example, the described techniques are performed in a different order from the described method, and/or components such as the described structure, device, etc. are combined or combined in a form different from the described method, or in other components or equivalents. Even if substituted or substituted by, appropriate results can be achieved.

Claims (13)

Module housing;
Blades rotatable with respect to the module housing;
A drive source including a rotor rotatable with respect to the module housing; And
(i) maintains a state separated from the rotor at the initial position, and (ii) when the rotor is rotated to a set position, it is coupled to the rotor to transmit power received from the drive source to the blades. and,
The rotation drive shaft,
A blade neutral position fixing device, characterized in that it maintains a state fixed to the module housing in an initial position, and is separated from the module housing when the rotor is rotated to the set position.
delete The method of claim 1,
The rotation drive shaft,
When the rotor is rotated to the set position, a portion of the rotation drive shaft elastically protrudes to engage with the rotor.
The method of claim 1,
The rotation drive shaft,
A wing rotation shaft directly connected to the wing and capable of rotating integrally with the wing;
A pin connection rotation shaft slidably connected to the blade rotation shaft;
A shaft connection pin fixed to an end of the pin connection rotation shaft; And
It includes a spring that provides an elastic force for the shaft connection pin to protrude toward the rotor,
The rotor is a blade neutral position fixing device comprising a frame having a portion into which the pin for connecting the shaft is inserted.
The method of claim 4,
The shaft connection pin,
Fin body; And
It includes a fin blade protruding from the fin body,
The rotor includes a shaft connection groove,
The shaft connection groove,
A body groove formed on the frame and into which the pin body may be inserted; And
A wing neutral position fixing device formed on the frame and including a wing groove into which the pin wing can be inserted.
The method of claim 5,
The module housing,
A fin wing receiving portion capable of accommodating the fin wing; And
Wing neutral position fixing device further comprising a fixed shaft capable of accommodating the pin body.
The method of claim 6,
In a state in which the fin body is accommodated in the fixed shaft and the fin blade is accommodated in the fin blade receiving part,
When the rotor is rotated at a specific angle, and the wing groove and the pin wing are aligned with each other,
The shaft connection pin is protruded from the fixed shaft and the pin wing receiving portion and is inserted into the shaft connection groove, whereby the shaft connection groove and the shaft connection pin are joined together. Device.
The method of claim 5,
The module housing,
Including a first fin wing receiving portion capable of accommodating the fin wing,
The rotation drive shaft,
A wing neutral position fixing device further comprising a second pin wing receiving portion capable of accommodating the pin wing.
The method of claim 8,
In a state in which the fin body is accommodated in the blade rotation shaft and the fin blade is accommodated in the first fin blade receiving portion and the second fin blade receiving portion,
When the rotor is rotated at a specific angle, and the wing groove and the pin wing are aligned with each other,
The shaft connection pin protrudes from the first pin wing receiving portion and the second pin wing receiving portion and is inserted into the shaft connection groove, so that the shaft connection groove and the shaft connection pin are mated. Wing neutral position fixing device.
Module housing;
Blades rotatable with respect to the module housing;
A drive source including a rotor rotatable with respect to the module housing; And
A blade rotation shaft connected to the blades to transmit power to the blades; And
A blade neutral position fixing device including a shaft connection pin that is slidable with respect to the blade rotation shaft and physically coupled or detachable to the rotor.
The method of claim 10,
In the module housing, a first fin blade receiving portion is formed to receive the fin blades of the shaft connection pin and restrict the rotation of the shaft connection pin,
In the blade rotation shaft, a second fin blade receiving portion is formed to receive the fin blade of the shaft connection pin and restrict the rotation of the shaft connection pin,
The blade neutral position fixing device, characterized in that the pin blade is accommodated in both the first fin blade receiving portion and the second fin blade receiving portion, so that the blade rotation shaft cannot be rotated with respect to the module housing.
The method of claim 10,
In the module housing, a pin wing receiving portion for accommodating the pin wing of the shaft connection pin is formed to restrict the rotation of the shaft connection pin,
The blade rotation shaft is non-rotatably connected with respect to the shaft connection pin, so that when the fin blade is accommodated in the fin blade receiving portion, the blade rotation shaft is not rotatable with respect to the module housing. Positioning device.
fuselage;
A module housing mountable in the body;
Blades rotatable with respect to the fuselage;
A rotation drive shaft connected to the wing and integrally rotated with the wing; And
A stator fixed to the module housing and a drive source having a rotor connected to the rotation drive shaft and rotated integrally with the rotation drive shaft,
The rotation drive shaft,
In order not to rotate with respect to the module housing, it is separated from the rotor and can be coupled to the module housing, and then connected to the rotor as the rotor rotates, and after being connected, it is not separated from the rotor,
(i) maintains a state separated from the rotor in the initial position, (ii) when the rotor is rotated to the set position, it is coupled to the rotor to transmit the power received from the drive source to the blades,
A projectile using a wing neutral position fixing device, characterized in that it maintains a state fixed to the module housing in an initial position, and is separated from the module housing when the rotor is rotated to the set position.

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