Truss type radar antenna wire rope drive mechanism

Abstract

The present application belongs to the technical field of radar antenna, and particularly relates to a truss type radar antenna steel wire rope driving mechanism, which comprises a mounting frame, a driving motor, a spline shaft and an internal thread sleeve arranged on the mounting frame, and two ends of an arc-shaped connecting plate are respectively connected with steel wire ropes, the steel wire ropes are respectively provided with a reel matched with the driving motor in a driving connection mode, the reel is coaxially and matchingly arranged with the spline shaft by means of a key groove arranged on the inner wall of the reel, one end of the spline shaft is connected with the driving end of the driving motor, and the other end is rotationally connected with the mounting frame, an outer thread matched with the internal thread sleeve is arranged on the outer wall of the reel, and the reel has the freedom of moving along the axial direction of the reel by means of the driving motor and the internal thread sleeve. The mechanism can realize the uniform winding and unwinding of the steel wire rope, improve the precision of the antenna angle adjustment, avoid the extrusion and abrasion of the steel wire rope, effectively prolong the service life of the steel wire rope and reduce the maintenance frequency.

Description

Technical Field

[0001] This invention belongs to the field of radar antenna technology, and specifically relates to a truss-type radar antenna wire rope drive mechanism. Background Technology

[0002] In truss-type radar antennas, the antenna is a parabolic cylindrical arc antenna with a diameter of tens of meters. During use, in order to better carry out astronomical observation, radar search and other tasks, this antenna needs to have a certain angle adjustment capability to better receive signals.

[0003] Existing technology includes an arc-shaped connecting plate at the bottom of an antenna support plate, connected to a hinge shaft. Both ends of the arc-shaped connecting plate are connected to the ends of steel wire ropes. The middle section of the steel wire rope extends rearward to a reel and is wound around it. As the reel rotates, the steel wire rope at one end of the arc-shaped connecting plate lengthens, while the steel wire rope at the other end shortens. This change in the length of the steel wire rope at both ends of the arc-shaped connecting plate causes the steel wire ropes to pull on the arc-shaped connecting plate. The arc-shaped connecting plate then drives the antenna to rotate along the hinge shaft, thus adjusting the antenna angle. However, during the reel rotation, the steel wire rope moves on the reel, resulting in uneven actual length during winding and unwinding. This causes the antenna angle to be unable to be precisely controlled, and may even cause the steel wire ropes to pile up and become tangled, resulting in compression and deformation. This leads to a decrease in the strength and wear resistance of the steel wire rope, affecting its service life. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a truss-type radar antenna wire rope drive mechanism, which can achieve uniform winding and unwinding of the wire rope, improve the accuracy of antenna angle adjustment, and at the same time avoid wire rope compression and wear, effectively extending the service life of the wire rope and reducing maintenance frequency.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A truss-type radar antenna wire rope drive mechanism includes a mounting frame and a drive motor mounted on the mounting frame, which is connected to the antenna via a curved connecting plate using wire ropes. The mounting frame is equipped with a splined shaft and an internal threaded sleeve. Wire ropes are connected to both ends of the curved connecting plate. Each wire rope is fitted with a reel that is driven and connected to the drive motor. The reel is coaxially fitted with the splined shaft via a keyway on its inner wall. One end of the splined shaft is connected to the drive end of the drive motor, and the other end is rotatably connected to the mounting frame. The outer wall of the reel has an external thread that matches the internal threaded sleeve. The reel has the freedom to move along its own axial direction via the drive motor and the internal threaded sleeve. The wire ropes are wound around the grooves of the external threads on the reel.

[0007] The spool is fitted with a locking nut adjacent to the internal threaded sleeve. The mounting bracket is equipped with a telescopic rod, the two ends of which are respectively hinged to the mounting bracket and the locking nut. The locking nut has the freedom to rotate on the spool by means of the telescopic rod.

[0008] The locking nut is provided with a drive collar that is driven to connect with the telescopic rod. The locking nut is provided with a first arc-shaped groove and a set of second arc-shaped grooves at intervals along its circumference. A pin assembly is provided in the first arc-shaped groove. The internal threaded sleeve is provided with a pin hole. The pin assembly extends from the locking nut into the pin hole. The drive collar is provided with a retraction drive block located in the first arc-shaped groove and a rotation drive block located in the second arc-shaped groove. The rotation of the drive collar respectively forms the retraction drive block driving the pin assembly and the rotation drive block driving the locking nut.

[0009] The pin assembly includes a pin body arranged axially along the locking nut, a ball body fixedly connected to the pin body, and a guide rail arranged in the first arc-shaped groove and cooperating with the ball body to form a guide. The retraction drive block is a wedge block, and the inclined surface of the wedge block cooperates with the ball body for drive. A return spring connected to the ball body is arranged in the first arc-shaped groove.

[0010] The two ends of the second arc-shaped groove and the two ends of the rotary drive block are respectively arranged along the radial direction of the locking nut.

[0011] The scrolls are arranged in parallel to each other, and the splined shafts connected to each scroll are connected by gear drive.

[0012] The beneficial effects of this invention are:

[0013] This invention employs a drive motor to rotate a splined shaft, with a reel coaxially mounted on the splined shaft. The splined shaft drives the reel to rotate synchronously, and the reel engages with an internal threaded sleeve. During the rotation of the reel, axial movement occurs on the splined shaft, ensuring that the wire rope's winding and unwinding positions remain consistent. This guarantees that the wire rope can be evenly wound and unwound in one rotation of the reel. The length of the wire rope from the arc-shaped connecting plate to the reel is easily controlled, thereby enabling precise adjustment of the antenna angle. Furthermore, the reel's axial movement during rotation ensures that the wire rope is neatly arranged along the axis of the reel during winding, preventing stacking, compression, or friction between the wire ropes. This avoids deformation or wear, effectively extending the wire rope's service life and reducing maintenance frequency. Attached Figure Description

[0014] Figure 1 This is a top view of the present invention;

[0015] Figure 2 This is a schematic diagram illustrating the usage state of the present invention;

[0016] Figure 3 for Figure 1 A cross-sectional view of the locking nut in the tightened state along the AA direction;

[0017] Figure 4 This is a diagram showing the lock nut in the loosened state.

[0018] Figure 5 for Figure 1 Sectional view along the BB direction of the internal threaded sleeve, lock nut and drive collar;

[0019] Figure 6 for Figure 5 A magnified schematic diagram of part C in the middle;

[0020] Figure 7 This is a schematic diagram of the drive collar structure;

[0021] In the attached diagram, 1. Mounting bracket, 2. Wire rope, 3. Arc-shaped connecting plate, 4. Drive motor, 5. Splined shaft, 6. Internal threaded sleeve, 7. Reel, 8. Locking nut, 9. Telescopic rod, 10. Drive collar, 11. First arc-shaped groove, 12. Second arc-shaped groove, 13. Pin assembly, 131. Pin body, 132. Ball, 133. Guide rail, 134. Return spring, 14. Pin hole, 15. Retracting drive block, 151. Inclined surface, 16. Rotation drive block, 17. Gear set. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0023] Specific implementation examples Figure 1-7 As shown, a truss-type radar antenna wire rope drive mechanism includes a mounting frame 1, and a drive motor 4, a splined shaft 5, and an internal threaded sleeve 6 mounted on the mounting frame 1. Wire ropes 2 are respectively mounted on both ends of the arc-shaped connecting plate 3 of the antenna. Each wire rope 2 is paired with a reel 7 that is driven and connected to the drive motor 4. One end of the wire rope 2 is connected to the reel 7. A keyway is provided on the inner wall of the reel 7. The reel 7 is fitted onto the splined shaft 5 via the keyway and is coaxially mounted with the splined shaft 5. One end of the splined shaft 5 is connected to the drive end of the drive motor 4, and the other end is rotatably connected to the mounting frame 1. An external thread matching the internal threaded sleeve 6 is provided on the outer wall of the reel 7. The reel 7 has the freedom to move along its own axial direction via the drive motor 4 and the internal threaded sleeve 6. The wire rope 2 is wound around the groove of the external thread on the reel 7. The spools 7 are arranged in parallel to each other. Among the splined shafts 5 connected to each spool 7, one splined shaft 5 is connected to the drive end of the drive motor 4 and is driven by the gear set 17 to the other splined shaft 5.

[0024] The reel 7 and the internal threaded sleeve 6 mesh with each other, driving the motor 4 to work and drive the splined shaft 5 to rotate the reel 7. During the rotation of the reel 7, the wire rope 2 is wound up and unwound. Under the action of the reel 7 and the internal threaded sleeve 6, the reel 7 moves axially, so that the winding and unwinding position of the wire rope 2 is always in the same position. This ensures that the wire rope 2 can be wound up and unwound evenly in one rotation of the reel 7. The length of the wire rope 2 from the arc-shaped connecting plate 3 to the reel 7 is easy to control, thereby realizing precise adjustment of the antenna angle. Since the reel 7 moves axially during rotation, the wire rope 2 is neatly arranged along the axial direction of the reel 7 during winding. There is no stacking, squeezing or friction between the wire ropes 2, avoiding deformation or wear of the wire rope 2, effectively improving the service life of the wire rope 2 and reducing the maintenance frequency.

[0025] Furthermore, a locking nut 8 adjacent to the internal threaded sleeve 6 is fitted on the reel 7, and a telescopic rod 9 is provided on the mounting frame 1. The two ends of the telescopic rod 9 are respectively hinged to the mounting frame 1 and the locking nut 8. The locking nut 8 has the freedom to rotate on the reel 7 by means of the telescopic rod 9. The telescopic rod 9 drives the locking nut 8 to rotate and tighten with the internal threaded sleeve 6. An axial force is generated between the locking nut 8 and the internal threaded sleeve 6, which increases the friction between the internal threaded sleeve 6 and the reel 7. This effectively prevents the reel 7 and the internal threaded sleeve 6 from loosening due to wind force during the shutdown process when the antenna angle does not need to be adjusted or the drive motor 4 is stopped, and prevents the change of antenna angle caused by the rotation of the reel 7.

[0026] Furthermore, the locking nut 8 is provided with a drive collar 10 that is driven to connect with the telescopic rod 9. The locking nut 8 has a first arc-shaped groove 11 and a set of second arc-shaped grooves 12 spaced along its circumference. A pin assembly 13 is provided in the first arc-shaped groove 11, and a pin hole 14 is provided on the internal threaded sleeve 6. The pin assembly 13 extends from the locking nut 8 into the pin hole 14. During the non-adjustment period of the antenna angle, the telescopic rod 9 can be closed to put it in a powerless state. The pin assembly 13 is inserted into the pin hole 14 to form an auxiliary brake on the locking nut 8 and the internal threaded sleeve 6, preventing the spool 7 from rotating and changing the antenna angle, and at the same time preventing the telescopic rod 9 from being damaged by the rotation of the spool 7 when the telescopic rod 9 is in a powerless state. The drive collar 10 is provided with a retraction drive block 15 located in the first arc-shaped groove 11 and a rotation drive block 16 located in the second arc-shaped groove 12. When the antenna angle needs to be adjusted, the drive collar 10 is controlled by the telescopic rod. Driven by motor 4, the telescopic rod 9 rotates forward. During rotation, it drives the retraction drive block 15 to rotate in the first arc groove 11, which in turn drives the pin assembly 13 to exit from the pin hole 14. This drives the rotation drive block 16 to rotate, and after the pin assembly 13 exits, the rotation drive block 16 pushes the locking bolt 8 to rotate in the second arc groove 12, loosening the locking bolt 8 from the internal thread sleeve 6. This allows the scroll 7 to rotate under the drive of motor 4, thereby adjusting the antenna angle. During the rotation of the scroll 7, the telescopic rod 9 stops. After the antenna angle is adjusted, the telescopic rod 9 drives the drive collar 10 to rotate in reverse. The retraction drive block 15 retracts in the first arc groove 11, and the rotation drive block 16 retracts in the second arc groove 12, driving the locking nut 8 to rotate in reverse and tighten with the internal thread sleeve 6. After tightening, the pin assembly 13 extends into the pin hole 14 to form a fixed connection between the locking nut 8 and the internal thread sleeve 6, preventing loosening between them. The upper end of the telescopic rod 9 is U-shaped, and the left and right ends of the drive collar 10 are located inside the upper end of the U-shaped structure and are hinged to the telescopic rod 9.

[0027] Specifically, the pin assembly 13 includes a pin 131 arranged axially along the locking nut 8, a ball 132 fixedly connected to the pin 131, and a guide rail 133 arranged in the first arc groove 11 and cooperating with the ball 132 to form a guide. The retraction drive block 15 is a wedge block, and the inclined surface 151 of the wedge block cooperates with the ball 132 to drive it. The wedge block is provided with a relief groove for the pin 131. When the wedge block moves in the first arc groove 11, it will not interfere with the pin 131 due to the arrangement of the relief groove. A return spring 134 connected to the ball 132 is provided in the first arc groove 11. The return spring 134 extends and pushes the ball 132 to slide along the guide rail 133. The pin 131 extends from the locking nut 8 into the pin hole 14.

[0028] The two ends of the second arc-shaped groove 12 and the two ends of the rotary drive block 16 are respectively arranged radially along the locking nut 8; the rotary drive block 16 moves within the second arc-shaped groove 12 as the drive collar 10 rotates, and the end of the rotary drive block 16 and the end of the second arc-shaped groove 12 fit together to form a surface contact, balancing the load and preventing damage to the rotary drive block 16 or the second arc-shaped groove 12; the drive collar 10 continues to rotate, and the end face of the rotary drive block 16 fits with the end face of the second arc-shaped groove 12 to drive the locking nut 8 to rotate, thereby tightening or loosening.

[0029] With the locking nut 8 tightened as the initial state, when antenna angle adjustment is needed, the drive collar 10 rotates clockwise, and the retracting drive block 15 moves within the first arc-shaped groove 11 until the inclined surface 151 contacts the sphere 132, pushing the sphere 132 backward along the guide rail 133. The return spring 134 is compressed, and the pin 131 retracts into the locking nut 8. The drive collar 10 continues to rotate clockwise, and the end of the rotating drive block 16 contacts the end of the second arc-shaped groove 12, pushing the locking nut 8 to rotate clockwise, preventing the pin 131 from contacting the pin hole 14. Collision damage occurs; when the locking nut 8 needs to be tightened, the drive collar 10 reverses, and the retracting drive block 15 moves in the opposite direction in the first arc groove 11 until it is separated from the ball 132. The drive collar 10 continues to reverse, and the other end of the rotating drive block 16 contacts the other end of the second arc groove 12 and pushes the locking nut 8 to reverse. After locking, the pin 131 is aligned with the pin hole 14, the return spring 134 releases its length, and the ball 132 moves forward along the guide rail 133, inserting the pin 131 into the pin hole 14.

Claims

1. A truss-type radar antenna wire rope drive mechanism, comprising a mounting frame (1) and a drive motor (4) connected to an arc-shaped connecting plate (3) of the antenna via a wire rope (2) and mounted on the mounting frame (1), characterized in that: The mounting bracket (1) is provided with a spline shaft (5) and an internal thread sleeve (6). The two ends of the arc-shaped connecting plate (3) are respectively connected with steel wire ropes (2). The steel wire ropes (2) are respectively provided with a reel (7) that is driven and connected to the drive motor (4). The reel (7) is coaxially matched with the spline shaft (5) by means of the keyway provided on its inner wall. One end of the spline shaft (5) is connected to the drive end of the drive motor (4), and the other end is rotatably connected to the mounting bracket (1). The outer wall of the reel (7) is provided with an external thread that matches the internal thread sleeve (6). The reel (7) has the freedom to move along its own axis by means of the drive motor (4) and the internal thread sleeve (6). The steel wire rope (2) is wound in the groove of the external thread on the reel (7). The spool (7) is fitted with a locking nut (8) adjacent to the internal thread sleeve (6). The mounting frame (1) is provided with a telescopic rod (9). The two ends of the telescopic rod (9) are respectively hinged to the mounting frame (1) and the locking nut (8). The locking nut (8) has the freedom to rotate on the spool (7) by means of the telescopic rod (9). The locking nut (8) is provided with a drive collar (10) that is driven to connect with the telescopic rod (9). The locking nut (8) is provided with a first arc groove (11) and a set of second arc grooves (12) at intervals along its circumference. The first arc groove (11) is provided with a pin assembly (13). The internal thread sleeve (6) is provided with a pin hole (14). The pin assembly (13) extends from the locking nut (8) into the pin hole (14). The drive collar (10) is provided with a retraction drive block (15) located in the first arc groove (11) and a rotation drive block (16) located in the second arc groove (12). The rotation of the drive collar (10) respectively forms the retraction drive block (15) driving the pin assembly (13) and the rotation drive block (16) driving the locking nut (8).

2. The truss-type radar antenna wire rope drive mechanism according to claim 1, characterized in that: The pin assembly (13) includes a pin (131) arranged axially along the locking nut (8), a ball (132) fixedly connected to the pin (131), and a guide rail (133) arranged in the first arc groove (11) and cooperating with the ball (132) to form a guide. The retraction drive block (15) is a wedge block, and the inclined surface (151) of the wedge block cooperates with the ball (132) to drive it. A return spring (134) connected to the ball (132) is provided in the first arc groove (11).

3. The truss-type radar antenna wire rope drive mechanism according to claim 1, characterized in that: The two ends of the second arc groove (12) and the two ends of the rotary drive block (16) are respectively arranged along the radial direction of the locking nut (8).

4. The truss-type radar antenna wire rope drive mechanism according to claim 1, characterized in that: The spools (7) are arranged in parallel to each other, and the spline shafts (5) connected to each spool (7) are driven to be connected by a gear set (17).

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