Low-profile large-bearing radar antenna pedestal

Abstract

The invention provides a low-profile large-bearing radar antenna pedestal, and relates to the technical field of radar antenna pedestals. According to the antenna pedestal, an inner ring and an outer ring are in bearing connection through a first bearing in a nested mode, flattening design is carried out, the radial space is fully utilized, the axial space of rotation is compressed as much as possible, and the height of loading loads is reduced; the outer ring is connected with an upper load through a topological optimized connecting claw, so that the influence of instantaneous impact potential energy is effectively reduced, and the problems that the overturning moment of the antenna pedestal is large and the impact load resistance is weak are solved; the antenna pedestal adopts the flexible hydraulic motor as a power source of the driving unit, so that damage to hardware such as rotating gears under the impact condition is effectively prevented; the movable ring of the collector ring is connected with the upper load through the flexible pull rod, it is guaranteed that the movable ring of the collector ring can rotate along with rotation of the upper load, line entanglement between the upper load and the radar base is avoided, and the situation that hard impact borne by the upper load is transmitted to the collector ring and consequently the collector ring is stuck can be prevented.

Description

Technical Field

[0001] The invention relates to the technical field of radar antenna pedestals, and in particular to a low-profile and high-load-bearing radar antenna pedestal. Background Art

[0002] The antenna pedestal plays a "connecting" role in the radar system. It is used to provide stable support for the upper antenna under various working conditions such as transportation and work. It is responsible for the transmission of signals and energy of the entire radar system, and is also responsible for adjusting the azimuth and attitude of the antenna array during operation.

[0003] The current antenna bases mostly adopt the structure of "turntable + slewing bearing + base" or "turntable + double bearing vertical shaft + base". These two types of antenna bases have large axial dimensions and high support points, which cause the overturning arm of the upper-mounted antenna relative to the support surface to be large. In addition, the structural characteristics cannot eliminate the instantaneous large impact potential energy, which is not conducive to the upper-mounted antenna working while moving. For airborne radars, it will also affect the motion characteristics of the carrier. Reducing the axial dimensions of the antenna base and reducing the impact potential energy through structural optimization are key measures to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a low-profile, high-load-bearing radar antenna pedestal, which solves the problems of large overturning moment and weak impact load resistance of the antenna pedestal.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A low-profile, high-load radar antenna base, the antenna base comprising: an inner ring, an outer ring, a connecting claw and a driving unit;

[0007] The inner ring and the outer ring are connected via a first bearing nested bearing, and a gear ring is mounted on the outer ring;

[0008] The drive unit is fixedly mounted on the inner ring, and the output gear of the drive unit is meshed with the ring gear;

[0009] The outer ring is connected to the upper load through a plurality of connecting claws, and the inner ring is fixedly connected to the radar base;

[0010] The inner ring, the outer ring, the first bearing and the gear ring are all coaxially arranged.

[0011] Preferably, the first bearing is a full-fill four-point contact ball bearing.

[0012] Preferably, the outer wall of the inner ring is provided with a first limiting ring extending outward, and a pre-tightening plate is installed at the bottom end of the inner ring through high-strength bolts, and the first limiting ring cooperates with the pre-tightening plate to clamp the inner ring of the first bearing;

[0013] The inner wall of the outer ring is provided with a second limiting ring extending inwardly, the gear ring is installed on the outer ring through high-strength bolts, and the second limiting ring cooperates with the gear ring to clamp the outer ring of the first bearing.

[0014] Preferably, the bottom end of the outer ring is dynamically sealed with the pre-tightening plate via a rotary oil seal; the top end of the outer ring is sealed with the inner ring via a labyrinth seal.

[0015] Preferably, the connecting claw comprises: a shear bushing and a pair of supporting claws;

[0016] The claw tips of the paired supporting claws are respectively fixed to the top and bottom of the outer ring through the hinged hole bolts, and the claw roots are connected through the shear bushings, and the inner holes of the shear bushings are interfaces for connecting the upper load.

[0017] Preferably, the driving unit comprises: a hydraulic motor and a reducer;

[0018] The hydraulic motor is transmission-connected with the reducer, and the output gear is installed on the output shaft of the reducer.

[0019] Preferably, an angle measuring device is installed on the inner ring, and the angle measuring device comprises: a double-piece gear and a multi-turn encoder;

[0020] The double-piece gear is installed on the inner ring through the second bearing, so that the double-piece gear is meshed with the gear ring; the multi-turn encoder is installed on the inner ring, and the input shaft of the multi-turn encoder is connected to the double-piece gear through a coupling.

[0021] Preferably, the gear ratio between the ring gear and the output gear is an infinite decimal; the gear ratio between the ring gear and the double-piece gear is 2 N , N is a positive integer.

[0022] Preferably, a valve group is installed on the inner side of the inner ring, and the cables and pipelines of the driving unit and the angle measuring device are connected to external equipment through the valve group.

[0023] Preferably, the antenna base further comprises: a slip ring; cables, pipelines, optical fibers and other lines between the upper load and the radar base are all connected through the slip ring; the fixed ring of the slip ring is fixedly connected to the inner ring through a bracket, and the dynamic ring of the slip ring is connected to the upper load through a plurality of flexible pull rods;

[0024] The flexible pull rod comprises: a first rod end joint bearing, a first pull rod, a hinge shaft, a second pull rod, a second rod end joint bearing and a transition mounting plate;

[0025] One end of the first pull rod is connected to the moving ring of the merge ring through the first rod end joint bearing, the other end of the first pull rod is connected to one end of the second pull rod through the hinge shaft, the other end of the second pull rod is connected to the transition mounting plate through the second rod end joint bearing, and the transition mounting plate is fixedly connected to the upper load.

[0026] The present invention provides a low-profile, high-load radar antenna pedestal. Compared with the prior art, it has the following advantages:

[0027] Beneficial effects:

[0028] In the present invention, the antenna seat connects the inner ring and the outer ring through the first bearing nested bearing, and performs a flattened design, fully utilizing the radial space, compressing the rotating axial space as much as possible, and reducing the height of the mounted load; and the mounted load is connected to the outer ring through the topologically optimized connecting claws, effectively reducing the influence of instantaneous impact potential energy, and solving the problem of large overturning moment of the antenna seat and weak impact load resistance performance; and the antenna seat adopts a flexible hydraulic motor as the power source of the driving unit, effectively preventing damage to the rotating gears and other hardware under impact conditions; the dynamic ring of the merge ring is connected to the mounted load by a flexible pull rod, which not only ensures that the dynamic ring of the merge ring can rotate with the rotation of the mounted load, avoiding entanglement of the lines between the mounted load and the radar base, but also prevents the hard impact on the mounted load from being transmitted to the merge ring, causing the merge ring to get stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 Schematic diagram of the structure of the antenna base in an embodiment of the present invention.

[0031] Figure 2 It is a partial cross-sectional view of the antenna base at the driving unit in an embodiment of the present invention.

[0032] Figure 3 It is a partial cross-sectional view of the antenna base at the angle measuring device in an embodiment of the present invention.

[0033] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0034] Figure 5 This is a topological optimization diagram of the supporting claw in an embodiment of the present invention.

[0035] Figure 6 It is a longitudinal partial cross-sectional view of the antenna base in an embodiment of the present invention.

[0036] The reference numerals in the figure are set as: inner ring 10, first bearing 11, first limit ring 12, pre-tightening plate 13, rotary oil seal 14, outer ring 20, gear ring 21, second limit ring 22, connecting claw 30, shear bushing 31, supporting claw 32, output gear 40, hydraulic motor 41, reducer 42, angle measuring device 50, double-piece gear 51, multi-turn encoder 52, second bearing 53, coupling 54, valve group 60, merge ring 70, first rod end joint bearing 71, first pull rod 72, hinge shaft 73, second pull rod 74, second rod end joint bearing 75, transition mounting plate 76. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The embodiment of the present application solves the problem of large overturning moment and weak impact load resistance of the antenna pedestal by providing a low-profile and large-load-bearing radar antenna pedestal.

[0039] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Example:

[0041] like Figure 1-Figure 3 As shown, the present invention provides a low-profile and high-load radar antenna base, the antenna base comprising: an inner ring 10, an outer ring 20, a connecting claw 30 and a driving unit;

[0042] The inner ring 10 and the outer ring 20 are connected by a first bearing 11 nested bearing, and a gear ring 21 is installed on the outer ring 20;

[0043] The drive unit is fixedly mounted on the inner ring 10 via a flange, and the output gear 40 of the drive unit is meshed with the ring gear 21;

[0044] The outer ring 20 is connected to the upper load through a plurality of connecting claws 30, and the inner ring 10 is fixedly connected to the radar base;

[0045] The inner ring 10 , the outer ring 20 , the first bearing 11 and the gear ring 21 are all coaxially arranged.

[0046] The first bearing 11 is a fully loaded four-point contact ball bearing, which improves its ability to withstand axial loads, radial loads, and overturning moments caused by vibration and impact.

[0047] like Figure 2 , Figure 3 As shown, the outer wall of the inner ring 10 is provided with a first limiting ring 12 extending outward, and a pre-tightening plate 13 is installed at the bottom end of the inner ring 10 through high-strength bolts. The first limiting ring 12 cooperates with the pre-tightening plate 13 to clamp the inner ring of the first bearing 11;

[0048] The inner wall of the outer ring 20 is provided with a second limiting ring 22 extending inwardly. The gear ring 21 is installed on the outer ring 20 by high-strength bolts. The second limiting ring 22 cooperates with the gear ring 21 to clamp the outer ring of the first bearing 11.

[0049] like Figure 2 , Figure 3 As shown, a rotary oil seal 14 is provided between the bottom end of the outer ring 20 and the pre-tightening plate 13 for dynamic sealing.

[0050] like Figure 4 As shown, the top end of the outer ring 20 is sealed with the inner ring 10 via a labyrinth seal.

[0051] like Figure 1 As shown, the connecting claw 30 includes: a shear bushing 31 and a pair of supporting claws 32;

[0052] The claw tips of the paired supporting claws 32 are respectively fixed to the top and bottom of the outer ring 20 by means of hole-making bolts, and the claw roots are connected by means of shear-resistant bushings 31 , the inner holes of which are interfaces for connecting the upper load.

[0053] like Figure 5 As shown, the support claw 32 serves as a force transmission structural member for the upper load, and the configuration and unit configuration of the support claw 32 are optimized based on the force transmission topology.

[0054] like Figure 1 , Figure 2 As shown, the driving unit includes: a hydraulic motor 41 and a reducer 42;

[0055] The hydraulic motor 41 is in transmission connection with the reducer 42 , and the output gear 40 is mounted on the output shaft of the reducer 42 .

[0056] like Figure 1 , Figure 3 As shown, an angle measuring device 50 is installed on the inner ring 10, and the angle measuring device 50 includes: a double-piece gear 51 and a multi-turn encoder 52;

[0057] The double-piece gear 51 is mounted on the inner ring 10 via a second bearing 53 , so that the double-piece gear 51 is meshed with the ring gear 21 ; the multi-turn encoder 52 is mounted on the inner ring 10 , and the input shaft of the multi-turn encoder 52 is connected to the double-piece gear 51 via a coupling 54 .

[0058] The gear ratio between the ring gear 21 and the output gear 40 is an infinite decimal, which effectively prevents the ring gear 21 and the output gear 40 from repeated wear at the same position; the gear ratio between the ring gear 21 and the double-piece gear 51 is 2 N , N is a positive integer, so that the angle measurement error generated by the angle measurement device 50 is equivalent to the angle measurement error of the antenna base, which will be reduced by 2 N times, thereby improving the angle measurement accuracy.

[0059] like Figure 1 As shown, a valve group 60 is installed inside the inner ring 10 , and cables and pipelines of the driving unit and the angle measuring device 50 are connected to external equipment through the valve group 60 .

[0060] like Figure 1-Figure 3 As shown, the inner ring 10 and the outer ring 20 are both hollow, and the inner wall of the inner ring 10 and the outer wall of the outer ring 20 are both provided with weight-reducing holes.

[0061] like Figure 1 As shown, the drive units are provided in two groups, and the two groups of drive units have completely identical structures and are arranged symmetrically, and can be used in a dual-drive or one-in-one-backup manner according to needs.

[0062] like Figure 6 As shown, the antenna base further includes: a slip ring 70;

[0063] The cables, pipelines, optical fibers and other lines between the upper load and the radar base are connected through the merge ring 70;

[0064] The fixed ring of the slip ring 70 is fixedly connected to the inner ring 10 through a bracket, and the moving ring of the slip ring 70 is connected to the upper load through a plurality of flexible tie rods;

[0065] The flexible pull rod comprises: a first rod end joint bearing 71, a first pull rod 72, a hinge shaft 73, a second pull rod 74, a second rod end joint bearing 75 and a transition mounting plate 76;

[0066] One end of the first tie rod 72 is connected to the moving ring of the merge ring 70 through the first rod end joint bearing 71, the other end of the first tie rod 72 is connected to one end of the second tie rod 74 through the hinge shaft 73, the other end of the second tie rod 74 is connected to the transition mounting plate 76 through the second rod end joint bearing 75, and the transition mounting plate 76 is fixedly connected to the upper load.

[0067] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0068] 1. In the embodiment of the present invention, the antenna seat connects the inner ring 10 and the outer ring 20 through the nested bearings of the first bearing 11, and performs a flattened design to make full use of the radial space, compress the rotating axial space as much as possible, and reduce the height of the upper load; and the upper load is connected through the outer ring 20 through the topologically optimized connecting claw 30, which effectively reduces the influence of instantaneous impact potential energy and solves the problem of large overturning moment and weak impact load resistance performance of the antenna seat.

[0069] 2. In the embodiment of the present invention, the antenna base adopts a flexible hydraulic motor 41 as the power source of the driving unit, which effectively prevents damage to the rotating gears and other hardware under impact conditions.

[0070] 3. In the embodiment of the present invention, in the antenna base, the moving ring of the slip ring 70 is connected to the upper load through a flexible pull rod, which ensures that the moving ring of the slip ring 70 can rotate with the rotation of the upper load to avoid entanglement of the line between the upper load and the radar base, and prevents the hard impact of the upper load from being transmitted to the slip ring 70, causing the slip ring 70 to get stuck.

[0071] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0072] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-profile, high-load radar antenna pedestal, characterized in that: The antenna base comprises: an inner ring (10), an outer ring (20), a connecting claw (30) and a driving unit; The inner ring (10) and the outer ring (20) are connected via a first bearing (11) and a nested bearing, and a gear ring (21) is mounted on the outer ring (20); The drive unit is fixedly mounted on the inner ring (10), and the output gear (40) of the drive unit is meshed with the ring gear (21); The outer ring (20) is connected to the upper load via a plurality of connecting claws (30), and the inner ring (10) is fixedly connected to the radar base; The inner ring (10), the outer ring (20), the first bearing (11) and the gear ring (21) are all coaxially arranged.

2. The low-profile, high-load radar antenna pedestal according to claim 1, characterized in that: The first bearing (11) is a fully loaded four-point contact ball bearing.

3. The low-profile, high-load radar antenna pedestal according to claim 1, characterized in that: The outer wall of the inner ring (10) is provided with a first limiting ring (12) extending outward, and the bottom end of the inner ring (10) is installed with a pre-tightening plate (13) through high-strength bolts, and the first limiting ring (12) cooperates with the pre-tightening plate (13) to clamp the inner ring of the first bearing (11); The inner wall of the outer ring (20) is provided with a second limiting ring (22) extending inwardly, the gear ring (21) is mounted on the outer ring (20) by means of high-strength bolts, and the second limiting ring (22) cooperates with the gear ring (21) to clamp the outer ring of the first bearing (11).

4. The low-profile, high-load radar antenna pedestal according to claim 1, characterized in that: The bottom end of the outer ring (20) is dynamically sealed with the pre-tightening plate (13) via a rotating oil seal (14); the top end of the outer ring (20) is sealed with the inner ring (10) via a labyrinth seal.

5. The low-profile, high-load radar antenna pedestal according to claim 1, characterized in that: The connecting claw (30) comprises: a shear-resistant bushing (31) and a pair of supporting claws (32); The claw tips of the paired supporting claws (32) are respectively fixed to the top and bottom of the outer ring (20) by means of hole-making bolts, and the claw roots are connected by means of a shear-resistant bushing (31), the inner hole of which is an interface for connecting the upper load.

6. The low-profile, high-load radar antenna pedestal according to claim 1, characterized in that: The driving unit comprises: a hydraulic motor (41) and a reducer (42); The hydraulic motor (41) is transmission-connected to the reducer (42), and the output gear (40) is mounted on the output shaft of the reducer (42).

7. The low-profile, high-load radar antenna pedestal according to claim 1, characterized in that: An angle measuring device (50) is installed on the inner ring (10), and the angle measuring device (50) comprises: a double-piece gear (51) and a multi-turn encoder (52); The double-piece gear (51) is mounted on the inner ring (10) via a second bearing (53), so that the double-piece gear (51) is meshed with the gear ring (21); the multi-turn encoder (52) is mounted on the inner ring (10), and the input shaft of the multi-turn encoder (52) is connected to the double-piece gear (51) via a coupling (54).

8. The low-profile, high-load radar antenna pedestal according to claim 7, characterized in that: The gear ratio between the ring gear (21) and the output gear (40) is an infinite decimal; the gear ratio between the ring gear (21) and the double-piece gear (51) is 2 N , N is a positive integer.

9. The low-profile, high-load radar antenna pedestal according to claim 7, characterized in that: A valve group (60) is installed inside the inner ring (10), and cables and pipelines of the drive unit and the angle measuring device (50) are connected to external equipment through the valve group (60).

10. The low-profile, high-load radar antenna pedestal according to any one of claims 1 to 9, characterized in that: The antenna base further comprises: a slip ring (70); cables, pipelines, optical fibers and other lines between the upper load and the radar base are all connected via the slip ring (70); the fixed ring of the slip ring (70) is fixedly connected to the inner ring (10) via a bracket, and the moving ring of the slip ring (70) is connected to the upper load via a plurality of flexible pull rods; The flexible pull rod comprises: a first rod end joint bearing (71), a first pull rod (72), a hinge shaft (73), a second pull rod (74), a second rod end joint bearing (75) and a transition mounting plate (76); One end of the first pull rod (72) is connected to the moving ring of the collector ring (70) through a first rod end joint bearing (71), the other end of the first pull rod (72) is connected to one end of the second pull rod (74) through a hinge shaft (73), the other end of the second pull rod (74) is connected to a transition mounting plate (76) through a second rod end joint bearing (75), and the transition mounting plate (76) is fixedly connected to the upper load.

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