Frame driving mechanism of platform type seeker

Abstract

The utility model discloses a frame driving mechanism of a platform type seeker, and relates to the technical field of seeker design and manufacture, the platform type seeker comprises a shell and a vertical two-frame movement mechanism which is arranged on the shell and comprises an inner frame and an outer frame, the inner frame motor drives the inner frame gear reduction mechanism to drive the inner frame to rotate in the first rotating direction, and the outer frame motor drives the outer frame gear reduction mechanism to drive the outer frame to rotate in the second rotating direction perpendicular to the first rotating direction. Therefore, under the constraint of a limited diameter, the output torque of the inner and outer frames is increased, the clear aperture of the lens of the inner frame is increased, the operating distance of the seeker is increased, and the miniaturization of the seeker is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of seeker design and manufacturing, in particular to a frame driving technology of a platform type image seeker with a technical system for locking a target before launching and automatically tracking the target after launching. Background Art

[0002] Platform-type seekers utilize a vertical two-frame motion mechanism. Traditionally, these drives employ direct motor drive or pull-rod drive. The frame's output torque in these methods primarily depends on the motor's torque. For seekers that require pre-launch target lock-on, the frame's ability to withstand launch overloads is critical. Generally, to improve the seeker's ability to withstand launch overloads, the motor's torque requirements are high, increasing the coil thickness and diameter of the seeker's torque motor and increasing internal space consumption. For the same aperture, the motor consumes more space, leaving less room for the lens, reducing the seeker's range. For the same range, the seeker's size must be increased to preserve sufficient space for the lens, making it difficult to miniaturize the seeker. Utility Model Content

[0003] The utility model provides a frame driving mechanism of a platform-type seeker, aiming to solve the problems of maximizing the action distance of the seeker and miniaturizing the seeker under the constraint of limited diameter.

[0004] The utility model provides a frame driving mechanism of a platform-type guide head, the platform-type guide head includes a guide head shell and a vertical two-frame motion mechanism including an inner frame and an outer frame installed on the guide head shell, the frame driving mechanism includes: an inner frame motor installed on the outer frame; an inner frame gear reduction mechanism driven by the inner frame motor, which drives the inner frame to rotate in a first rotation direction; wherein the first rotation direction is parallel to the surface where the inner frame gear reduction mechanism is located; an outer frame motor installed on the shell; an outer frame gear reduction mechanism driven by the outer frame motor, which drives the outer frame to rotate in a second rotation direction, so that the inner frame installed on the outer frame rotates in the second rotation direction with the outer frame; wherein the second rotation direction is parallel to the surface where the outer frame gear reduction mechanism is located and perpendicular to the first rotation direction.

[0005] Preferably, the inner frame is mounted on the outer frame via a first inner frame rotation shaft and a second inner frame rotation shaft that are oppositely arranged so as to rotate in the first rotation direction.

[0006] Preferably, the inner frame gear reduction mechanism includes: an inner frame motor gear installed on the driving shaft end of the inner frame motor; and a first camera gear processed on one side surface of the inner frame and matched with the inner frame motor gear.

[0007] Preferably, the inner frame motor gear and the first camera gear adopt an internal gear transmission structure.

[0008] Preferably, the inner frame motor gear has arc-shaped external teeth, and the first camera gear has arc-shaped internal teeth.

[0009] Preferably, the frame driving mechanism also includes: an inner frame angle detection mechanism arranged on a side opposite to the inner frame gear reduction mechanism, the inner frame angle detection mechanism including: an inner frame angle sensor installed on the outer frame; an inner frame angle sensor gear installed on the rotating shaft of the inner frame angle sensor; a second camera gear processed on the other side surface of the inner frame and cooperating with the inner frame angle sensor gear; wherein, the inner frame angle sensor detects the rotation angle of the inner frame in the first rotation direction by sensing the rotation of the inner frame angle sensor gear.

[0010] Preferably, the outer frame is mounted on the inner wall of the shell via a first outer frame transmission shaft and a second outer frame transmission shaft that are arranged opposite to each other so as to rotate in a second rotation direction perpendicular to the first rotation direction.

[0011] Preferably, the outer frame gear reduction mechanism comprises: an outer frame motor gear mounted on the driving shaft end of the outer frame motor; and a first outer frame gear mounted on an end of the first outer frame transmission shaft away from the housing.

[0012] Preferably, the outer frame motor gear and the first outer frame gear adopt an external gear transmission structure.

[0013] Preferably, the frame driving mechanism also includes: an outer frame angle detection mechanism arranged on a side opposite to the outer frame gear reduction mechanism, the outer frame angle detection mechanism including: an outer frame angle sensor installed on the outer frame; an outer frame angle sensor gear installed on the rotating shaft of the outer frame angle sensor; a second outer frame gear installed at the end of the second outer frame transmission shaft away from the housing and cooperating with the outer frame angle sensor gear; wherein, the outer frame angle sensor detects the rotation angle of the outer frame in the second rotation direction by sensing the rotation of the outer frame angle sensor gear, and then determines the rotation angle of the inner frame in the second rotation direction that rotates following the outer frame.

[0014] The utility model provides a frame driving mechanism of a platform-type guide head, wherein the inner frame motor drives the inner frame gear reduction mechanism to drive the inner frame to rotate in a first rotation direction, and the outer frame motor drives the outer frame gear reduction mechanism to drive the outer frame to rotate in a second rotation direction perpendicular to the first rotation direction, so that the inner frame mounted on the outer frame rotates along with the outer frame in the second rotation direction. Under the constraint of limited diameter, the output torque of the inner and outer frames can be increased, the clear aperture of the optical lens can be increased, the effective distance of the guide head can be improved, and it is also conducive to the miniaturization of the guide head. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the servo frame gear transmission structure provided by the present invention;

[0016] Figure 2a This is a schematic diagram of the servo inner frame gear transmission structure provided by the present invention;

[0017] Figure 2b 、 Figure 2c 、 Figure 2d They are Figure 2a DD-direction cross-section, EE-direction cross-section, and half-section;

[0018] Figure 3a This is a schematic diagram of the servo outer frame gear transmission structure provided by the present invention;

[0019] Figure 3b and Figure 3c They are Figure 2a Middle DD and EE cross-sections;

[0020] Explanation of the accompanying drawings: 1-lens (inner frame), 2-first camera gear (camera inner gear), 3-inner frame motor, 4-inner frame motor gear, 5-inner frame angle sensor gear, 6-inner frame angle sensor, 7-first camera gear (camera outer gear), 8-outer frame (inner frame support), 9-second outer frame gear, 10-outer frame angle sensor, 11-outer frame angle sensor gear, 12-first outer frame gear, 13-outer frame motor gear, 14-outer frame motor, 15-housing (outer frame support), 16-inner frame motor drive shaft, 17-first inner frame transmission shaft, 18-second inner frame transmission shaft, 19-inner frame angle sensor rotation shaft, 20-outer frame motor drive shaft, 21-first outer frame transmission shaft, 22-second outer frame transmission shaft, 23-outer frame angle sensor rotation shaft. DETAILED DESCRIPTION

[0021] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The utility model provides a frame drive mechanism for a platform-type seeker. Figures 1 to 3c The platform-type guide head includes a shell 15 and a vertical two-frame motion mechanism including an inner frame 1 and an outer frame 8 installed on the shell 15. In the utility model, the inner frame 1 is installed on the inner wall of the outer frame 8 through the relatively arranged first inner frame rotating shaft 17 and the second inner frame rotating shaft 18 to rotate in the first rotation direction, and the outer frame 8 is installed on the inner wall of the shell 15 through the relatively arranged first outer frame transmission shaft 21 and the second outer frame transmission shaft 22 to drive the inner frame 1 to rotate in the second rotation direction perpendicular to the first rotation direction.

[0023] The frame driving mechanism includes: an inner frame motor 3 installed on the outer frame 8; an inner frame gear reduction mechanism driven by the inner frame motor 3, which drives the inner frame 1 to rotate in a first rotation direction, wherein the first rotation direction is parallel to the surface where the inner frame gear reduction mechanism is located; an outer frame motor 14 installed on the shell 15; an outer frame gear reduction mechanism driven by the outer frame motor 14, which drives the outer frame 8 to rotate in a second rotation direction, so that the inner frame 1 installed on the outer frame 8 rotates in the second rotation direction along with the outer frame 8; wherein the second rotation direction is parallel to the surface where the outer frame gear reduction mechanism is located and perpendicular to the first rotation direction.

[0024] In order to reduce the demand for motor torque and thus reduce the thickness and diameter of the motor, the inner frame system adopts a gear reduction mechanism. Specifically, the servo inner frame motor drive side of the seeker adopts a gear structure, and the gear on the inner frame end shaft adopts an arc-shaped internal gear structure or an external gear structure. Taking the inner gear structure on the inner frame end shaft as an example, Figure 1 、 Figure 2a 、 Figure 2b 、 Figure 2c 、 Figure 2dIn the schematic diagram of the servo inner-frame gear transmission structure, the inner-frame system utilizes a reduction transmission design to ensure that the infrared image seeker, which requires pre-launch target lock, does not lose lock during launch. The inner-frame gear reduction mechanism includes an inner-frame motor gear 4 mounted on the drive shaft 16 of the inner-frame motor 3, and a first camera gear 2 machined onto one side of the inner frame 1 to mate with the inner-frame motor gear 4. Taking the example of an inner frame employing an internal gear structure (i.e., an internal gear transmission structure between the inner frame motor gear 4 and the first camera gear 2), the first camera gear 2 has arc-shaped internal teeth, while the inner frame motor gear 4 has arc-shaped external teeth. The arc length of this arc structure (referred to as the arc length) is determined by the seeker frame angle. Specifically, the inner frame motor 3, mounted on the inner wall of the outer frame 8, is directly connected to the inner frame motor gear 4 (i.e., the inner frame motor gear 4 is mounted on the drive shaft 16 of the inner frame motor 3). The external teeth of the inner frame motor gear 4 mesh with the internal teeth of the first camera gear 2, enabling the inner frame motor 3 to drive the inner frame 1 via the reduction gear. When the radius of the first camera internal gear 2 is larger than that of the inner frame motor gear 4, the frame output torque can be increased. The specific transmission ratio can be selected based on the seeker's torque and dynamic performance requirements, the seeker's servo bandwidth, and the requirements for transmitting overload resistance. For example, if the first camera gear 2 adopts an inner arc structure and the transmission ratio with the inner frame motor gear 4 is 1:1.2, the torque output from the lens (inner frame) 1 end can reach 1.2 times the torque of the inner frame motor 3, thus reducing the torque requirement of the inner frame motor. Figure 1 、 Figure 2a 、 Figure 2b 、 Figure 2dThe frame drive mechanism of the present invention may further include an inner frame angle detection mechanism disposed on a side opposite the inner frame gear reduction mechanism. The inner frame angle detection mechanism may include: an inner frame angle sensor 6 mounted on the inner wall of the outer frame 8; an inner frame angle sensor gear 5 mounted on the rotating shaft 19 of the inner frame angle sensor 6; and a second camera gear 7 machined on the other side of the inner frame 1 and mating with the inner frame angle sensor gear 5. The inner frame angle sensor 6 detects the rotation angle of the inner frame 1 in the first rotational direction by sensing the rotation of the inner frame angle sensor gear 5. For example, in the case where the inner frame angle sensor 6 employs an external gear structure, the inner frame angle sensor 6 is directly connected to the inner frame angle sensor gear 5 (i.e., the frame angle sensor gear 5 is mounted on the rotating shaft 19 of the inner frame angle sensor 6). The external teeth of the inner frame angle sensor gear 5 then mesh with the external teeth of the second camera gear 7, transmitting the motion of the inner frame 1 to the inner frame angle sensor 6. As can be seen from the figure, the inner frame 1 of the present invention utilizes both internal gear transmission of the first camera gear 2 and external gear transmission of the second camera gear 7.

[0025] Considering the large load on the outer frame, and to reduce the motor torque requirement and thus the motor thickness and diameter, the outer frame drive utilizes a gear reduction mechanism to increase the frame's output torque. This gear reduction mechanism may include: an outer frame motor gear 13 mounted on the drive shaft end of the outer frame motor 14; and a first outer frame gear 12 mounted on one end of the rotating shaft of the outer frame 8 and mating with the outer frame motor gear 13.

[0026] Considering the large load on the outer frame, in order to reduce the demand for motor torque and thus reduce the thickness and diameter of the motor, the outer frame system adopts a gear reduction mechanism to increase the frame output torque. The outer frame gear reduction mechanism may include: an outer frame motor gear 13 mounted on the end of the drive shaft 20 of the outer frame motor 14; and a first outer frame gear 12 mounted on the end of the first outer frame transmission shaft 21 away from the housing 15. Figure 1 、 Figure 3a 、 Figure 3bThe outer frame end adopts an external gear structure (i.e., the outer frame motor gear 13 and the first outer frame gear 12 adopt an external gear transmission structure), the outer frame motor gear 13 has arc-shaped external teeth, and the first outer frame gear 12 has arc-shaped external teeth. The length of the arc is determined according to the seeker frame angle. Specifically, the outer frame motor 14 is mounted on the inner wall of the housing 15, and the outer frame motor gear 13 is directly connected to the outer frame motor 14 (i.e., the outer frame motor gear 13 is mounted on the drive shaft 20 of the outer frame motor 14). The outer frame motor gear 13 adopts an external gear structure, and the outer frame gear 12 is provided at the end of the first outer frame transmission shaft 21 away from the housing 15. The first outer frame gear 12 adopts an arc-shaped external gear structure. The outer frame motor 14 drives the outer frame 8 to move through the reduction gear mechanism formed by the outer frame motor gear 13 and the outer frame gear 12. The transmission ratio can be selected according to the seeker's requirements for torque and dynamic performance, the seeker's servo bandwidth, and the requirements for anti-launch overload. For example, the outer frame 8 is driven by the outer frame gear 12, and the outer frame motor gear 13 and the outer frame gear 12 adopt an outer gear meshing transmission ratio of 1:1.3. The torque output by the outer frame 8 can reach 1.3 times the torque of the outer frame motor 14. The frame driving mechanism of the present invention may also include: an outer frame angle detection mechanism is set on the side opposite to the outer frame gear reduction mechanism, see Figure 3a and Figure 3cThe outer frame angle detection mechanism may include: an outer frame angle sensor 10 mounted on the outer frame 8; an outer frame angle sensor gear 11 mounted on the rotating shaft 23 of the outer frame angle sensor 10; and a second outer frame gear 9 mounted on the end of the second outer frame transmission shaft 22 away from the housing 15 and mating with the outer frame angle sensor gear 11. The outer frame angle sensor 10 detects the rotation angle of the outer frame 8 in the second rotational direction by sensing the rotation of the outer frame angle sensor gear 11, thereby determining the rotation angle of the inner frame 1 in the second rotational direction, which rotates along with the outer frame 8. During operation, the outer frame angle sensor 10 mounted on the inner wall of the housing 15 has an external gear structure. The outer frame angle sensor 10 is directly connected to the outer frame angle sensor gear 11 (i.e., the outer frame angle sensor gear 11 is mounted on the rotating shaft 23 of the outer frame angle sensor 10). The external teeth of the outer frame angle sensor gear 11 mesh with the external teeth of the second outer frame gear 9, thereby transmitting the movement of the outer frame 8 to the outer frame angle sensor 10. As can be seen from the figure, the outer frame 8 of the present invention utilizes an external gear transmission for the first outer frame gear 12 and the second outer frame gear 9. This gear transmission method reduces the motor torque requirement by designing the transmission ratio, thereby creating more favorable spatial conditions for increasing the clear aperture of the seeker lens and improving the operating range. Furthermore, while maintaining the same operating range, this helps reduce the size of the seeker, achieving a miniaturized design. Furthermore, since the seeker outer frame 8 of the present invention is arranged on the inner wall of the seeker housing 15, radial dimension consumption is further reduced, increasing the available space for the inner frame lens 1 within the seeker (i.e., providing more radial space for increasing the clear aperture of the inner frame lens 1 within the aperture constraint). This maximizes the seeker's operating range and, while maintaining the same operating range, further reduces the size (i.e., diameter) of the seeker, contributing to a miniaturized design.

[0027] The frame drive mechanism of the utility model adopts a gear reduction mechanism with internal or external teeth to drive the inner and outer frames, replacing the traditional direct drive or pull rod type drive of the inner and outer frames, and arranges the outer frame support structure on the seeker housing, which can solve the problems of maximizing the effective range of the seeker and miniaturizing the seeker under the constraint of limited diameter. When it is used in the design of platform-type seeker, under the condition of the same caliber, it can significantly improve the effective range of the seeker to the target, and under the condition of the same effective range, it can significantly reduce the diameter of the seeker to meet different needs and different environments.

[0028] The preferred embodiments of the present invention are described above with reference to the accompanying drawings, but are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, and improvements made by those skilled in the art without departing from the scope and essence of the present invention shall fall within the scope of the present invention.

Claims

1. A frame drive mechanism for a platform-type seeker, comprising a housing and a vertical two-frame motion mechanism comprising an inner frame and an outer frame mounted on the housing, characterized in that: The frame driving mechanism comprises: an inner frame motor mounted on the outer frame; An inner frame gear reduction mechanism driven by the inner frame motor drives the inner frame to rotate in a first rotation direction; wherein the first rotation direction is parallel to a plane where the inner frame gear reduction mechanism is located; an outer frame motor mounted on the housing; The outer frame gear reduction mechanism driven by the outer frame motor drives the outer frame to rotate in the second rotation direction, so that the inner frame mounted on the outer frame rotates along with the outer frame in the second rotation direction; wherein the second rotation direction is parallel to the surface where the outer frame gear reduction mechanism is located and perpendicular to the first rotation direction.

2. The frame driving mechanism according to claim 1, wherein: The inner frame is mounted on the outer frame via a first inner frame rotation shaft and a second inner frame rotation shaft that are oppositely arranged to perform rotational movement in the first rotation direction.

3. The frame driving mechanism according to claim 1 or 2, characterized in that: The inner frame gear reduction mechanism includes: an inner frame motor gear mounted on an end of a drive shaft of the inner frame motor; A first camera gear is processed on one side surface of the inner frame and matches the inner frame motor gear.

4. The frame driving mechanism according to claim 3, characterized in that: The inner frame motor gear and the first camera gear adopt an internal gear transmission structure.

5. The frame driving mechanism according to claim 4, characterized in that: The inner frame motor gear has circular arc-shaped external teeth, and the first camera gear has circular arc-shaped internal teeth.

6. The frame driving mechanism according to claim 3, wherein: The frame driving mechanism further includes: an inner frame angle detection mechanism provided on a side opposite to the inner frame gear reduction mechanism, the inner frame angle detection mechanism including: an inner frame angle sensor mounted on the outer frame; an inner frame angle sensor gear mounted on the rotating shaft of the inner frame angle sensor; a second camera gear processed on the other side surface of the inner frame and cooperating with the inner frame angle sensor gear; The inner frame angle sensor detects the rotation angle of the inner frame in the first rotation direction by sensing the rotation of the inner frame angle sensor gear.

7. The frame driving mechanism according to claim 1, wherein: The outer frame is mounted on the inner wall of the housing via a first outer frame transmission shaft and a second outer frame transmission shaft that are oppositely arranged so as to rotate in a second rotation direction that is perpendicular to the first rotation direction.

8. The frame driving mechanism according to claim 7, wherein: The outer frame gear reduction mechanism includes: an outer frame motor gear mounted on the drive shaft end of the outer frame motor; A first outer frame gear is mounted on an end of the first outer frame transmission shaft away from the housing.

9. The frame driving mechanism according to claim 8, characterized in that: The outer frame motor gear and the first outer frame gear adopt an external gear transmission structure.

10. The frame driving mechanism according to claim 7, wherein: The frame driving mechanism further comprises: An outer frame angle detection mechanism is provided on a side opposite to the outer frame gear reduction mechanism, and the outer frame angle detection mechanism includes: an outer frame angle sensor mounted on the outer frame; an outer frame angle sensor gear mounted on the rotating shaft of the outer frame angle sensor; a second outer frame gear mounted on an end of the second outer frame transmission shaft away from the housing and cooperating with the outer frame angle sensor gear; The outer frame angle sensor detects the rotation angle of the outer frame in the second rotation direction by sensing the rotation of the outer frame angle sensor gear, and further determines the rotation angle of the inner frame in the second rotation direction that rotates following the outer frame.

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