Radar antenna pitching locking mechanism

Abstract

The utility model belongs to the technical field of radar antennas, and particularly relates to a radar antenna pitching locking mechanism, a radar antenna is arranged on a pitching swing seat, and the pitching swing seat is hinged to an azimuth turntable and has the degree of freedom of pitching swing relative to the azimuth turntable. The locking mechanism comprises a telescopic assembly and a locking hole, the telescopic assembly is arranged on the azimuth turntable, the locking hole is formed in the pitching swing seat, and when a radar antenna borne by the pitching swing seat faces upwards, the telescopic assembly and the locking hole are matched in an inserted mode to form pitching locking of the radar antenna. The locking mechanism can provide reliable rigid connection for the pitching swing seat of the radar antenna, and the capacity of the pitching swing seat of the radar antenna for resisting extreme external force impact is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to radar antenna technical field, concretely relates to a radar antenna pitch locking mechanism. BACKGROUND

[0002] Radar is widely used in national defense, aviation, weather and many other fields, and its antenna as the key component of signal transceiver plays a decisive role in system performance. When the radar antenna is not working for a long time, in order to reduce external interference and protect the equipment, the rotating pitch swing seat is usually set to the antenna towards the sky.

[0003] At present, electromagnetic brakes are generally used in various radar antennas, aiming to ensure the stability of the antenna during non-working period. However, when the radar antenna is placed upward for a long time, the existing electromagnetic braking scheme has many problems. In the aspect of mechanics, the upward antenna is not only subjected to the continuous action of gravity in the pitch direction, but also needs to withstand huge external torque in strong wind, heavy rain and other bad weather. Long-time energization of the electromagnetic brake will cause the electromagnetic coil to heat up, accelerate the aging of internal parts and reduce the braking performance. The swing of the antenna in the pitch direction not only aggravates the wear of the structural parts, but also may damage the antenna and cause the radar system to be paralyzed in severe cases.

[0004] In addition, the positioning accuracy of the antenna pitch angle of some radars is extremely high. For example, the radar used for space target monitoring, the slight deviation of the antenna pitch angle may lead to failure of target tracking. And the electromagnetic brake in the braking state for a long time is difficult to maintain high-precision angle locking due to mechanical fatigue.

[0005] Therefore, how to ensure that the pitch swing seat of the radar antenna maintains high stability in the non-working state for a long time, and greatly improves its ability to resist extreme external force impact, is a problem that needs to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0006] The utility model discloses a radar antenna pitch locking mechanism, which can provide reliable rigid connection for the pitch swing seat of the radar antenna and effectively improve the ability of the pitch swing seat of the radar antenna to resist extreme external force impact.

[0007] The specific technical scheme adopted by the utility model is as follows:

[0008] The utility model relates to a radar antenna elevation locking mechanism, radar antenna is arranged on the elevation swing seat, the elevation swing seat is hinged and is arranged on the azimuth turntable, has the freedom of relative azimuth turntable elevation swing, key lies in, the locking mechanism includes telescopic component and locking hole, telescopic component is arranged on the azimuth turntable, locking hole is arranged on the elevation swing seat, when the radar antenna carried by the elevation swing seat is arranged towards the sky, telescopic component and locking hole are inserted and are matched and form the elevation locking of radar antenna.

[0009] Telescopic component includes screw rod, locking pin and screw sleeve, one end of locking pin is fixed with screw rod, the other end is inserted and is matched with locking hole, screw sleeve is rotatably installed on the box, screw sleeve is threadedly connected with screw rod, screw sleeve is transmission connected with the output shaft of motor and has the freedom of rotating around the axis of screw sleeve, and screw sleeve rotates and pushes screw rod and locking pin to be telescopic on the box.

[0010] The outer side of screw sleeve is coaxially fixed with transmission gear, and screw sleeve is transmission connected with the output shaft of motor through transmission gear.

[0011] The motor is provided with a quick-release type crank handle.

[0012] The overhanging end of screw rod is extended from the box, a limit block is arranged on the overhanging end, a pair of proximity switches are arranged on the box, the limit block is located between the two proximity switches and cooperates with the proximity switches to limit the stroke of the locking pin.

[0013] A semicircular gear is arranged on the elevation swing seat, the elevation swing seat is transmission connected with the driving equipment through the semicircular gear to realize the adjustment of the elevation angle, and the locking pin and the locking hole are respectively arranged in parallel with the axis of the semicircular gear.

[0014] A locking sleeve is arranged on the edge of the locking hole of the elevation swing seat, the locking sleeve extends towards the telescopic component, the inner hole of the locking sleeve is in the structure of a large outer diameter and a small inner diameter, and the locking pin is inserted and matched with the inner hole of the locking sleeve.

[0015] The utility model discloses the beneficial effect is:

[0016] In the utility model, the locking mechanism adopts the mode of inserting and locking to lock the elevation angle of radar antenna, the mechanical structure of the locking mechanism can provide reliable rigid connection, provides additional protection for the antenna, ensures that the antenna remains in the position of facing the sky, avoids the change of the elevation angle of the antenna due to external force, and causes the damage of equipment, the locking mechanism can be powered off after locking the antenna, prevents the electromagnetic brake from being fatigued due to long-time power-on and keeping the braking state, can better meet the requirement of long-term stable fixation of the antenna, reduces the maintenance cost and risk,

[0017] The extension and retraction of the locking pin can be controlled by the forward and reverse rotation of the motor, which is convenient to operate; the friction between the screw sleeve and the lead screw can realize self-locking, preventing the retraction of the locking pin, and the locking pin can keep the plug-in cooperation with the locking hole after the power-off of the motor, maintaining the locking of the radar antenna;

[0018] The overhanging end of the lead screw is provided with a limiting block, the box body is provided with a pair of proximity switches arranged at intervals, the limiting block is located between the two proximity switches and cooperates with the proximity switches to form the stroke limiting of the locking pin, preventing the locking pin from being excessively extended or retracted, and ensuring the accurate position of the locking pin each time. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front view of the telescopic assembly;

[0020] Figure 2 It is a sectional view of A-A of Figure 1

[0021] Figure 3 It is a right view of the telescopic assembly;

[0022] Figure 4 It is an application schematic view of the utility model;

[0023] Figure 5 It is an enlarged schematic view of part B of Figure 4

[0024] In the drawings, 1 is a pitching swing seat, 2 is an azimuth turntable, 3 is a telescopic assembly, 4 is a locking sleeve, 5 is a box body, 6 is a motor, 7 is a screw sleeve, 8 is a crank handle, 9 is a proximity switch, 10 is a transmission gear, 11 is a semicircular gear, 12 is a lead screw, 1201 is an overhanging end, 13 is a locking pin, and 14 is a limiting block. DETAILED DESCRIPTION

[0025] The utility model will be further described in combination with the drawings and specific embodiments:

[0026] The specific embodiments are shown in Figure 1 , Figure 4 , Figure 5 The utility model relates to a radar antenna pitching locking mechanism, and the radar antenna is arranged on a pitching swing seat 1, the pitching swing seat 1 is hingedly arranged on an azimuth turntable 2 and has a relative azimuth turntable 2 pitching swing degree of freedom, and the key is that the locking mechanism comprises a telescopic assembly 3 and a locking hole, the telescopic assembly 3 is arranged on the azimuth turntable 2, and the locking hole is arranged on the pitching swing seat 1, when the radar antenna borne by the pitching swing seat 1 is arranged towards the sky, the telescopic assembly 3 and the locking hole are plug-in cooperated to form the pitching locking of the radar antenna. The azimuth turntable 2 is rotationally arranged on a base, and the base is fixedly connected with the ground.​​

[0027] When the radar antenna is not in operation for a long time, the radar antenna is adjusted to be directed to the sky, at this time, the locking hole on the pitching swing base 1 is coaxially arranged with the telescopic assembly 3, the telescopic assembly 3 is elongated into the locking hole and is inserted and matched with the locking hole, so as to lock the pitching angle of the radar antenna. The mechanical structure of the locking mechanism can provide reliable rigid connection, provide additional protection for the antenna, ensure that the antenna is kept in the sky direction position, avoid the damage of the equipment caused by the change of the pitching angle of the antenna due to external force, lock the antenna after the locking mechanism, and power off the electromagnetic brake to prevent the electromagnetic brake from being fatigued due to long-time power-on and braking state, so as to better meet the requirements of long-term stable fixation of the antenna, reduce the maintenance cost and risk.

[0028] As shown in Figure 1 , Figure 2 , the telescopic assembly 3 comprises a lead screw 12, a locking pin 13 and a screw sleeve 7, one end of the locking pin 13 is fixedly connected with the lead screw 12, the other end is inserted and matched with the locking hole, the screw sleeve 7 is rotatably installed on the box body 5, the screw sleeve 7 is threadedly connected with the lead screw 12, the screw sleeve 7 is drivingly connected with the output shaft of the motor 6 and has the freedom of rotating around the axis of the screw sleeve 7, the screw sleeve 7 rotates to drive the lead screw 12 and the locking pin 13 to be telescoped on the box body 5, and the box body 5 is installed on the azimuth turntable 2. The transmission between the lead screw 12 and the screw sleeve 7 has the advantages of high transmission accuracy and stable operation, can accurately control the telescopic distance of the locking pin 13, so as to ensure the accurate insertion of the locking pin 13 and the locking hole and improve the reliability of the locking; the extension and retraction of the locking pin 13 can be controlled by the forward and reverse rotation of the motor 6, which is convenient to operate; more importantly, the friction between the screw sleeve 7 and the lead screw 12 can realize self-locking to prevent the locking pin 13 from retracting, and the locking pin 13 can maintain the insertion and matching with the locking hole after the motor 6 is powered off, thereby maintaining the locking of the radar antenna.

[0029] A strip-shaped protrusion is arranged on the inner wall of the box body 5, a guide groove is arranged on the locking pin 13, the protrusion and the guide groove are inserted and matched, which can prevent the locking pin 13 and the lead screw 12 from rotating with the screw sleeve 7, and also guide the telescoping of the locking pin 13, so that the locking pin 13 accurately moves back and forth along the set straight line track.

[0030] A transmission gear 10 is coaxially arranged on the outer side of the screw sleeve 7, the screw sleeve 7 is drivingly connected with the output shaft of the motor 6 through the transmission gear 10, and the transmission of the transmission gear 10 enhances the stability of the kinetic energy transmission. Specifically, the output shaft of the motor 6 is connected with a first driving gear through a first speed reducer, the output shaft of the motor 6 transmits power to the first driving gear, the first driving gear is engaged with the transmission gear 10 for transmission, the transmission gear 10 drives the screw sleeve 7 to rotate synchronously, thereby driving the locking pin 13 to be telescoped on the box body 5.

[0031] As shown in Figures 1-3As shown, the motor 6 is provided with a quick-release crank handle 8, the connecting end of the output shaft of the motor 6 is provided with a hexagonal spline structure, and the connecting end of the crank handle 8 is provided with an internal hexagonal sleeve matched with the hexagonal spline. The quick-release structure is formed by the sleeve of the inner hole and the spline. When the motor 6 fails or needs to be manually operated to lock the mechanism, the quick-release crank handle 8 can be quickly installed on the motor and connected with the output shaft of the motor 6. By manually rotating the crank handle 8, the output shaft of the motor 6 is rotated, thereby driving the extension and retraction of the locking pin 13, providing an emergency operation mode for the locking mechanism, and improving the reliability and adaptability of the system. When the motor 6 is powered on, the crank handle 8 is not installed to prevent the motor 6 from rotating the crank handle 8 and causing danger.

[0032] The overhanging end 1201 of the lead screw 12 extends from the box 5, and a limit block 14 is arranged on the overhanging end 1201. The box 5 is provided with a pair of proximity switches 9 arranged at intervals, and the limit block 14 is located between the two proximity switches 9 and cooperates with the proximity switches 9 to form the stroke limit of the locking pin 13. The two proximity switches 9 are fixed to the box 5 by means of a mounting plate, and are arranged at intervals along the axial direction of the lead screw 12. When the motor 6 is driven to rotate the nut 7, the limit block 14 moves linearly with the extension and retraction assembly 3. When the limit block 14 moves close to one of the proximity switches, it reaches the sensing range of the proximity switch 9, which detects the signal of the limit block 14 and feeds back the signal to the controller of the motor 6. The controller controls the motor 6 to stop operating, thereby preventing the locking pin 13 from continuing to extend outward or retracting excessively, ensuring the accurate position of the locking pin 13 each time it extends and retracts, avoiding damage to the locking pin 13 and the locking hole due to excessive extension, and affecting the normal operation of other parts of the equipment due to the excessive extension of the locking pin 13. It also ensures that the retracted position of the locking pin 13 is fixed each time, preparing for the next locking operation.

[0033] The pitch swing seat 1 is provided with a semicircular gear 11, and the pitch swing seat 1 is connected with a driving device through the semicircular gear 11 to realize the adjustment of the pitch angle. The driving device is a driving motor, which is connected with a second driving gear through a second speed reducer, and the second driving gear is in meshing transmission with the semicircular gear 11. The axis of the center of the semicircular gear 11 is collinear with the hinge shaft of the pitch swing seat 1 and the azimuth turntable 2. The rotation of the semicircular gear 11 drives the pitch swing seat 1 to swing relative to the azimuth turntable 2, and the locking pin 13 and the locking hole are arranged parallel to the axis of the semicircular gear 11. The locking pin 13 and the locking sleeve 4 are inserted and matched to effectively prevent the pitch swing seat 1 from shaking under external force, thereby enhancing the stability of the locking mechanism in locking the pitch angle of the radar antenna.

[0034] The locking sleeve 4 is arranged on the pitching swing seat 1 around the edge of the locking hole, extends towards the telescopic assembly 3, the inner hole of the locking sleeve 4 is in a large-outside-small-inside horn mouth structure, and the locking pin 13 is in plug-in cooperation with the inner hole of the locking sleeve 4. The overhanging end of the locking sleeve 4 overhangs from the pitching swing seat 1 towards the locking pin 13, and the locking stroke of the locking pin 13 is reduced; the large-outside-small-inside horn mouth structure guides the insertion process of the locking pin 13, facilitates the accurate insertion of the locking pin 13 into the locking sleeve 4, and thus in plug-in cooperation with the locking hole.

Claims

1. A radar antenna pitch locking mechanism, wherein the radar antenna is mounted on a pitch swing mount (1), and the pitch swing mount (1) is hinged to an azimuth turntable (2) and has a degree of freedom to pitch relative to the azimuth turntable (2), characterized in that: The locking mechanism comprises a telescopic assembly (3) and a locking hole, the telescopic assembly (3) is arranged on the azimuth turntable (2), the locking hole is arranged on the pitching swing base (1), when the radar antenna carried by the pitching swing base (1) is arranged towards the sky, the telescopic assembly (3) and the locking hole are inserted and matched to form the pitching locking of the radar antenna.

2. A radar antenna elevation lock mechanism according to claim 1, characterized in that: The telescopic assembly (3) comprises a lead screw (12), a locking pin (13) and a screw sleeve (7), one end of the locking pin (13) is fixedly connected with the lead screw (12), the other end is inserted and matched with the locking hole, the screw sleeve (7) is rotatably arranged on the box body (5), the screw sleeve (7) is threadedly connected with the lead screw (12), the screw sleeve (7) is drivingly connected with the output shaft of the motor (6) and has the freedom of rotating around the axis of the screw sleeve (7), the screw sleeve (7) rotates to drive the lead screw (12) and the locking pin (13) to extend and retract on the box body (5).

3. A radar antenna elevation locking mechanism according to claim 2, characterized in that: The outer side of the screw sleeve (7) is coaxially fixedly provided with a transmission gear (10), the screw sleeve (7) is drivingly connected with the output shaft of the motor (6) through the transmission gear (10).

4. A radar antenna elevation lock mechanism according to claim 2, characterized in that: The motor (6) is provided with a quick-release crank handle (8).

5. A radar antenna elevation lock mechanism according to claim 2, characterized in that: The overhanging end (1201) of the lead screw (12) is arranged on the box body (5), the overhanging end (1201) is provided with a limiting block (14), the box body (5) is provided with a pair of interval arranged proximity switches (9), the limiting block (14) is located between the two proximity switches (9) and cooperates with the proximity switches (9) to form the stroke limiting of the locking pin (13).

6. A radar antenna elevation lock mechanism according to claim 2, characterized in that: The pitching swing base (1) is provided with a semicircular gear (11), the pitching swing base (1) is drivingly connected with the driving device through the semicircular gear (11) to realize the adjustment of the pitching angle, the locking pin (13) and the locking hole are respectively arranged parallel to the axis of the semicircular gear (11).

7. A radar antenna elevation lock mechanism as claimed in claim 2, characterized in that: The locking sleeve (4) is arranged around the edge of the locking hole on the pitching swing base (1), the locking sleeve (4) extends towards the telescopic assembly (3), the inner hole of the locking sleeve (4) is in the structure of large outside and small inside, the locking pin (13) is inserted and matched with the inner hole of the locking sleeve (4).

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