Load assisted adjustment radar antenna pedestal

Abstract

The application relates to the field of radar antennas and provides a load-assisted adjusting type radar antenna pedestal, which comprises a rotating disc, a pitching support arm connected with the rotating disc and used for connecting a radar antenna, a lifting screw rod connected with the pitching support arm and used for adjusting the angle of the pitching support arm, a lifting driving system installed on the rotating disc and connected with the lifting screw rod and used for driving the lifting screw rod to move, and a driving element installed between the rotating disc and the radar antenna and used for adjusting the angle of the radar antenna. In use, the driving force of the antenna during lifting can be effectively reduced under the condition that the height of the mobile transportation and the working height of the antenna are met, and the position of the load center of gravity can be adjusted at different working angles of the antenna.

Description

Technical Field

[0001] This invention relates to the field of radar antenna technology, and more specifically to a load-assisted adjustable radar antenna mount. Background Technology

[0002] Requirements such as radar detection range, detection accuracy, and anti-stealth capabilities have led to an increase in the size and quantity of radar antennas and equipment. At the same time, it is desirable for radar antennas to be able to switch between different elevation angles.

[0003] like Figure 1 and Figure 2 As shown, conventional antenna mounts limit the length of radar antennas due to the combined effects of the length specifications of the finalized vehicle and the position of the rear axle. Furthermore, after the antenna layout is completed, the antenna's center of gravity will deviate significantly from the center of rotation of the antenna mount at different working angles, which is not conducive to long-term stable operation.

[0004] To address these issues, we propose a load-assisted adjustable radar antenna mount. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a load-assisted adjustable radar antenna mount, which solves the problem that the antenna center deviates far from the rotation center when working at different angles, which is not conducive to long-term stable operation.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A load-assisted adjustable radar antenna mount includes a turntable;

[0010] The pitch support arm is rotatably connected to the turntable and is used to connect the radar antenna;

[0011] A lifting screw is connected to the pitch arm and is used to adjust the angle of the pitch arm;

[0012] A lifting drive system is mounted on the turntable and connected to the lifting screw, used to drive the lifting screw to move;

[0013] A drive element, installed between the turntable and the radar antenna, is used to adjust the angle of the radar antenna.

[0014] In a new embodiment, a pitch encoder is coaxially arranged with the rotation axis of the pitch arm, used to measure the real-time angle of the pitch arm, and electrically connected to the lifting drive system.

[0015] In a new embodiment, the lifting drive system includes:

[0016] case;

[0017] Driver source;

[0018] A lifting reducer, connected to the drive source, is mounted on the housing and connected to the housing via a first bearing;

[0019] The drive wheel, located inside the housing, is connected to the output shaft of the lifting reducer.

[0020] The nut is connected to the housing via a tapered bearing, and the internal thread of the nut is connected to the external thread of the lifting screw.

[0021] The driven wheel is fitted onto the nut and meshes with the driving wheel;

[0022] A rotary oil seal is connected to the tapered bearing and the housing.

[0023] In a new embodiment, the lifting drive system further includes:

[0024] The first bevel gear is connected to the drive wheel and is coaxially arranged with the drive shaft, and the other end of the first bevel gear is connected to the housing through a third bearing;

[0025] The second bevel gear meshes with the first bevel gear;

[0026] The manual shaft is connected to the second bevel gear and to the housing via the second bearing, with one end of the manual shaft extending outside the housing.

[0027] In a new embodiment, it also includes:

[0028] The base is connected to the turntable via a slewing bearing;

[0029] An orientation drive unit is installed between the base and the turntable to drive the turntable to rotate.

[0030] In a new embodiment, the orientation driving unit includes:

[0031] Orientation drive motor;

[0032] An azimuth reducer is connected to the azimuth drive motor;

[0033] The drive gear is connected to the power shaft of the geared motor and meshes with the slewing bearing.

[0034] In a new embodiment, it also includes:

[0035] Two limiting components are installed on the turntable and located on the movement trajectory of the pitch arm, used to limit the rotation angle of the pitch arm during forward and reverse rotation within a preset range.

[0036] In a new embodiment, it also includes:

[0037] A double round nut is installed at the end of the lifting screw.

[0038] In a new embodiment, a transition plate is mounted on the base and is position-adjustable. The drive gear is rotatably connected to the transition plate so that the gap between the drive gear and the slewing bearing changes when the position of the transition plate is adjusted.

[0039] In a new embodiment, the turntable is connected to the pitch arm via a double hinge shaft and is sealed by a rotary oil seal.

[0040] (III) Beneficial Effects

[0041] Compared with the prior art, the beneficial effects of the present invention are:

[0042] 1. While meeting the requirements of mobile transport height and antenna working height, effectively reduce the instantaneous driving force for antenna lifting, and adjust the position of the load center of gravity at different antenna working angles, so that the radar system can be transported and operated in a more stable state.

[0043] 2. Effectively reduce the instantaneous driving force for antenna lifting while meeting the requirements for mobile transport height and minimum antenna operating height.

[0044] 3. For radar antennas operating at different angles, adjust the antenna's center of gravity to ensure that the distance between the antenna's center of gravity and the antenna mount's rotation center is within a reasonable range, thus guaranteeing the antenna mount's reliable operation over a long period of time. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 Layout diagram of the transportation status of a mobile radar;

[0047] Figure 2 Layout diagram of the mobile radar in operation;

[0048] Figure 3 A schematic diagram of the rear view of the connection structure between the lifting drive system and the pitch boom;

[0049] Figure 4 A front view of the connection structure between the lifting drive system and the pitch boom;

[0050] Figure 5 This is a schematic diagram of the connection structure between the azimuth drive unit and the slewing bearing;

[0051] Figure 6 A schematic diagram of the connection structure between the turntable and the pitch arm;

[0052] Figure 7 This is a schematic diagram of the lifting drive system.

[0053] Figure 8 A schematic diagram showing the physical limits of the lifting screw in its working and transport states;

[0054] Figure 9 Schematic diagram of the principle for adjusting the center of gravity of the antenna using a lifting screw.

[0055] In the picture:

[0056] 1. Turntable 2. Pitch control arm

[0057] 3. Lifting screw 4. Lifting drive system

[0058] 401. Shell

[0059] 402, Driver Source

[0060] 403. Lifting reducer

[0061] 404, Drive Wheel

[0062] 405. Lifting nut

[0063] 406. Driven wheel

[0064] 407. First bevel gear

[0065] 408. Second bevel gear

[0066] 409. Manual Shaft

[0067] 5. Drive components 6. Pitch encoder

[0068] 7. Base; 8. Orientation drive unit

[0069] 801. Orientation drive motor

[0070] 802. Axial reducer

[0071] 803. Drive gear

[0072] 9. Limiting component; 10. Double round nut

[0073] 11. Transition plate 12. Slewing bearing Detailed Implementation

[0074] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0075] Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

[0076] This application provides a load-assisted adjustable radar antenna mount, which solves the problem that the center of the radar antenna deviates far from the rotation center of the antenna mount at different working angles. It enables the antenna to be closer to the rotation center at different working angles, reducing the torque of the antenna's gravity and facilitating long-term stable operation.

[0077] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0078] An elevation arm 2 is added to the bottom of the antenna to support it. The angle of the antenna can be adjusted by using the lifting screw 3 and the drive element 5. At the same time, the lateral movement of the antenna can also be adjusted, so that the antenna is closer to the rotation center.

[0079] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0080] Reference Figure 1 and Figure 2 In existing technologies, the layout of mobile radar mainly includes a vehicle platform, a turntable, and an antenna. The antenna rotates relative to the turntable via a hinge A, allowing it to operate at a certain angle. The distance L0 between the bottom of the antenna and the rear of the platform is limited by the length of the transport platform of the standardized vehicle. Furthermore, to meet the requirements of mobile transport, the height H1 from the top of the platform (PTD) to the top of the antenna must be less than the transport limit height H limit - platform height H0 (refer to GJB 2948-1997). At the same time, the height HA of the hinge A from the top of the platform is also limited, which in turn limits the height H2 of the antenna bottom from the platform at the operating angle, affecting the antenna's operating shielding angle α.

[0081] Meanwhile, the driving force F for the antenna to rotate around hinge axis A generally reaches its maximum value F1 at the moment of lifting during transport. At this time, according to the torque balance, F1L1=GL2. Similarly, the supporting force F2 in the working state satisfies F2L1′=GL1cosθ. To reduce the driving force F1 at the moment of lifting and the supporting force F2 in the working state, the distance L2 from the antenna's center of gravity to the hinge axis must be reduced. However, at the working angle Θ, reducing L2 will cause the antenna's center of gravity to shift away from the turntable's rotation center L3.

[0082] Reference Figures 3-9 A load-assisted adjustable radar antenna mount includes a turntable 1, a slewing bearing 12, a base 7, an azimuth drive unit 8, an elevation arm 2, an elevation encoder 6, a lifting screw 3, a lifting drive system 4, and a drive element 5.

[0083] Reference Figure 3 and Figure 4 The slewing bearing 12 is mounted on the base 7 and can rotate. The turntable 1 is mounted on the slewing bearing. The orientation drive unit 8 is connected to the slewing bearing 12 and drives the slewing bearing 12 to rotate. The orientation drive unit 8 includes a motor, a reducer, a transition plate 11, and a drive gear 803. The motor and reducer are fixedly mounted on the base 7 through the transition plate 11. The external teeth of the drive gear 803 mesh with the external teeth of the slewing bearing 12 to drive the turntable 1 to rotate relative to the base 7.

[0084] Reference Figure 6 The pitch support arm 2 is hinged to the turntable 1 via two hinge shafts. Each hinge point consists of a pair of tapered roller bearings, a hinge shaft, a pitch rotary oil seal, two pitch round nuts, a bushing, and a spacer.

[0085] Reference Figure 5 The azimuth drive unit 8 drives the slewing bearing 12 and the turntable 1 to rotate. The pitch arm 2 is located on the turntable 1 and rotates with the turntable 1. The pitch arm 2 is rotated by the lifting screw 3 and the lifting drive system 4, which causes the angle of the antenna to change.

[0086] The driving element 5 is driven by a hydraulic cylinder telescopic or an electric telescopic rod, with one end rotatably connected to the antenna and the other end rotatably connected to the turntable 1. Alternatively, one end can be rotatably connected to the antenna and the other end slidably connected to the turntable 1.

[0087] The lifting drive system 4 drives the lifting screw 3 to move, and the lifting screw 3 pushes the pitch arm 2 to rotate. The lifting screw 3 and the pitch arm 2 are rotatably and / or slidably connected, and the lifting drive system 4 can also be rotatably and / or slidably configured. In this way, the lifting drive system 4, the lifting screw 3, and the pitch arm 2 can be interconnected in various ways, while ensuring that the pitch arm 2 can rotate smoothly.

[0088] The pitch encoder 6 is coaxially mounted with the hinge shaft and is used to provide feedback on the real-time angle of the pitch arm 2. It can also feed back the real-time angle to the lifting drive system 4 or other electrical components, including the radar control box and drive element 5. It is coaxially arranged with the rotation axis of the pitch arm 2, used to measure the real-time angle of the pitch arm 2, and is electrically connected to the lifting drive system 4.

[0089] The antenna mount includes a turntable 1; an elevation arm 2, rotatably connected to the turntable 1 for connecting the radar antenna; a lifting screw 3, connected to the elevation arm 2 for adjusting the angle of the elevation arm 2; a lifting drive system 4, mounted on the turntable 1 and connected to the lifting screw 3 for driving the lifting screw 3 to move; and a drive element 5, mounted between the turntable 1 and the radar antenna for adjusting the angle of the radar antenna.

[0090] Reference Figure 7 The lifting drive system 4 includes a housing 401; a drive source 402; a lifting reducer 403 connected to the drive source 402, mounted on the housing 401, and connected to the housing 401 via a first bearing; a drive wheel 404 located inside the housing 401 and connected to the output shaft of the lifting reducer 403; a lifting nut 405 connected to the housing 401 via a tapered bearing, and the internal thread of the lifting nut 405 is connected to the external thread of the lifting screw 3; and a driven wheel 406 sleeved on the lifting nut 405 and meshing with the drive wheel 404.

[0091] The lifting drive system 4 includes a lifting reducer 403 and a drive source 402. The drive source 402 can be a stepper motor, servo motor, or other types of motor. The lifting drive system 4 drives the lifting nut 405 to move relative to the lead screw through a pair of spur gear driven wheels 406. The first bevel gear 407 is coaxially mounted with the spur gear, which is the driving wheel 404.

[0092] The first bevel gear 407 and the second bevel gear 408 are used in pairs and are led out to the outside of the housing 401 via a manual shaft 409. The outer end of the manual shaft 409 has a specific shape to facilitate rotation, such as an external hexagon, external octagon, or internal hexagon, serving as a hand-crank interface. By manually rotating the manual shaft 409, the second bevel gear 408 and the first bevel gear 407 rotate relative to each other, which in turn causes the lifting nut 405 to move relative to the lifting screw. The lifting screw 3 is provided with a hand-crank external interface, so that the lifting screw 3 can be manually driven to a maintenance state when the lifting drive system 4 malfunctions.

[0093] The driving wheel 404 and the driven wheel 406 can be connected by gear meshing, by transmission belt, or by other transmission methods.

[0094] The drive source 402 drives the lifting reducer 403 to work. The lifting reducer 403 drives the drive wheel 404 to rotate. The drive wheel 404 drives the driven wheel 406 to rotate. The driven wheel 406 drives the lifting nut 405 to rotate. The lifting nut 405 interacts with the lifting screw 3, causing the lifting screw 3 to move. The lifting screw 3 pushes the pitch arm 2 to rotate, thereby adjusting the angle of the antenna. At the same time, the rotation of the pitch arm 2 can also change the center of gravity of the antenna.

[0095] The double round nut 10 is installed at the end of the lifting screw 3.

[0096] Adjust the position of the round nut relative to the lead screw to set a physical limit, ensuring that the maximum position of the pitch arm 2 in the radar antenna working state does not exceed the limit.

[0097] Because the lifting screw is subjected to a large axial force, a tapered roller bearing is selected for the support bearing. Since the axial force on the gear pair is small, a high-efficiency deep groove ball bearing is selected for the support bearing. The housing 401 is sealed with a rotary oil seal.

[0098] The orientation drive unit 8 includes: an orientation drive motor 801; an orientation reducer 802 connected to the orientation drive motor 801; and a drive gear 803 connected to the power shaft of the reducer motor and meshing with the slewing bearing 12.

[0099] The azimuth drive motor 801 drives the azimuth reducer 802, which in turn drives the drive gear 803 to rotate. The drive gear 803 drives the slewing bearing 12 to rotate, which in turn drives the turntable 1 to rotate.

[0100] A transition plate 11 is mounted on the base 7 and its position is adjustable. The drive gear 803 is rotatably connected to the transition plate 11 so that the gap between the drive gear 803 and the slewing bearing 12 changes when the position of the transition plate 11 is adjusted. The transition plate 11 can slide on the base 7 along the diametrical direction of the meshing of the drive gear 803 and the slewing bearing 12 to adjust the meshing backlash.

[0101] The turntable 1 and the pitch support arm 2 are connected by a double hinge shaft and sealed by a rotary oil seal.

[0102] The turntable 1 and the pitch support arm 2 are connected by a double hinge shaft. Each hinge shaft is connected by a pair of tapered roller bearings and a pair of round nuts with tightening torque to eliminate backlash. The moving pair is sealed by a rotary oil seal as a rotary motion seal.

[0103] like Figure 8 As shown, a limiting component 9 is set on the turntable 1 to limit the working angle of the pitch arm 2. The working position GZDW is set at the bottom of the rotating support ear, and the transport position YSDW is set at the rear of the pitch arm 2 to ensure that the pitch arm 2 does not exceed the limit in both working and transport states.

[0104] Two limiting members 9 are installed on the turntable 1 and located on the movement trajectory of the pitch support arm 2, which are used to limit the rotation angle of the pitch support arm 2 during forward and reverse rotation to a preset range.

[0105] like Figure 9 As shown, the tilt angle of the pitch boom 2 in the transport state is... 0. After the antenna is lifted according to the transport state fulcrum, the distance by which the center of gravity shifts from the rotation center M is L3. L3 is also the optimal adjustment amount of the elevation arm 2. That is, L3 = Lcosθ0 - Lcos(θ0 + Δθ). From the angle of force on the lifting screw 3, when the tilt angle of the lifting screw 3 exceeds 90°, the force on the screw changes from compression to tension, which is not conducive to the stable use of the system. Therefore, θ0 + Δθ < 90°.

[0106] Similarly, the change in the vertical distance H between the lowest point of the antenna and the ground is ΔH = Lsin(θ0 + Δθ) - Lsinθ0.

[0107] From L3 and ΔH and 0 and Δ From the relationship, we know that MAXL3=MAXΔH≤L, and the hinge distance L of the pitch arm 2 can be determined from this relationship.

[0108] In summary, compared with existing technologies, it has the following beneficial effects:

[0109] 1. While meeting the requirements for mobile transport height and antenna working height, effectively reduce the instantaneous driving force for antenna lifting, and adjust the position of the load center of gravity at different antenna working angles, so that the radar system can be transported and operated in a more stable state.

[0110] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A load-assisted adjustable radar antenna mount, characterized in that, include: Turntable; The pitch support arm is rotatably connected to the turntable and is used to connect the radar antenna; A lifting screw is connected to the pitch arm and is used to adjust the angle of the pitch arm; A double round nut is installed at the end of the lifting screw; A lifting drive system is mounted on the turntable and connected to the lifting screw, used to drive the lifting screw to move; A driving element is installed between the turntable and the radar antenna to adjust the angle of the radar antenna; A pitch encoder, coaxially arranged with the rotation axis of the pitch arm, is used to measure the real-time angle of the pitch arm and is electrically connected to the lifting drive system. The lifting drive system includes: case; Driver source; A lifting reducer, connected to the drive source, is mounted on the housing and connected to the housing via a first bearing; The drive wheel, located inside the housing, is connected to the output shaft of the lifting reducer. The lifting nut is connected to the housing via a tapered bearing, and the internal thread of the lifting nut is connected to the external thread of the lifting screw. The driven wheel is fitted onto the lifting nut and meshes with the driving wheel; The first bevel gear is connected to the driving wheel and is coaxial with the driving wheel, and the other end of the first bevel gear is connected to the housing through the third bearing; The second bevel gear meshes with the first bevel gear; The manual shaft is connected to the second bevel gear and to the housing via the second bearing, with one end of the manual shaft extending outside the housing.

2. The antenna mount as described in claim 1, characterized in that, Also includes: The base is connected to the turntable via a slewing bearing; An orientation drive unit is installed between the base and the turntable to drive the turntable to rotate.

3. The antenna mount as described in claim 2, characterized in that, The orientation driving unit includes: Orientation drive motor; An azimuth reducer is connected to the azimuth drive motor; The drive gear is connected to the power shaft of the azimuth reducer and meshes with the slewing bearing.

4. The antenna mount as described in claim 1, characterized in that, Also includes: Two limiting components are installed on the turntable and located on the movement trajectory of the pitch arm, used to limit the rotation angle of the pitch arm during forward and reverse rotation within a preset range.

5. The antenna mount as described in claim 3, characterized in that, Also includes: A transition plate is mounted on the base and its position is adjustable. The drive gear is rotatably connected to the transition plate so that the gap between the drive gear and the slewing bearing changes when the position of the transition plate is adjusted.

6. The antenna mount as described in claim 1, characterized in that, The turntable is connected to the pitch arm via a double hinge shaft and is sealed by a rotary oil seal.

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