Fine-adjustable quiet zone scanning frame rotating shaft

Abstract

The utility model relates to a fine-tuning quiet zone scanning frame rotating shaft, which comprises a rotating base, a lower box body, an upper box body, a pitch shaft, an adapter shaft and a wave-absorbing mounting plate, an azimuth shaft is arranged at the bottom of the lower box body, the azimuth shaft is rotatably arranged on the rotating base through a pivotal bearing, and the upper box body is arranged at the top of the lower box body. An orientation adjusting assembly used for conducting fine adjustment on the initial orientation of the lower box body and the initial orientation of the upper box body is arranged between the rotating base and the lower box body, a levelness adjusting assembly used for conducting fine adjustment on the initial levelness of the upper box body is arranged on the upper box body, the pitch shaft is arranged on the front face of the upper box body, and the adapter shaft is connected to the pitch shaft. And a wave-absorbing mounting plate is arranged at the joint of the adapter shaft and the pitch shaft. The beneficial effects of the utility model are that: can carry out fine tuning to the orientation and levelness of rotating shaft after equipment installation, effectively guarantee the initial precision of structure assembly of rotating shaft so as to satisfy the modern test precision demand.

Description

TECHNICAL FIELD

[0001] The utility model belongs to RCS tight shrinkage field static area scanning frame measurement technical field, more specifically relates to a kind of fine tuning static area scanning frame rotating shaft. BACKGROUND

[0002] In recent years, stealth, anti-stealth technology develops rapidly, and the testing precision requirement of target radar cross section (Radar Crocs Section, RCS) test is higher and higher. The tight shrinkage field is widely applied due to its small occupation, high testing precision, all-weather measurement, good secrecy and other advantages. The area with the minimum reflection inside the darkroom is called static area, and the size of the RCS static area of the tight shrinkage field, the range of the static area, the amplitude tapering, the amplitude ripple, the phase ripple, the reflection level, the cross polarization, the path loss, the working frequency and other parameters are the main indicators for measuring the performance of the static area. Therefore, it is very important to detect the performance indicators of the static area of the tight shrinkage field.

[0003] The static area scanning frame is usually used for darkroom static area performance test and evaluation, and mainly includes a stand, a rotating shaft, a horizontal moving shaft and a polarization shaft. The horizontal moving shaft is installed on the top of the stand, the polarization shaft is installed on the horizontal moving shaft, and the rotating shaft is installed on the polarization shaft. The rotating shaft, as a key component, can realize the rotation and pitch movement of the horizontal moving shaft, so as to measure the static area cut surface electrical performance indicators. For a large static area scanning frame, the height of the scanning frame is more than 10 meters, and the weight of the horizontal moving shaft is several tons. It is inevitable to have assembly and deformation errors, and it is difficult to solve the problem by machining a single part. The rotating shaft of the existing scanning frame scheme mainly has the basic rotation and pitch functions, and does not have the fine tuning function of the azimuth and level after installation. Therefore, it is more suitable to design a fine tuning scanning frame rotating shaft to meet the modern testing precision requirement. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the shortcomings of the prior art, and provides a fine tuning static area scanning frame rotating shaft, which can fine tune the azimuth and level of the rotating shaft after installation, effectively ensure the initial assembly accuracy of the rotating shaft structure, and meet the modern testing precision requirement.

[0005] The utility model achieves the above-mentioned purpose by the following technical scheme.

[0006] The fine-tunable quiet zone scanning frame rotating shaft comprises a rotating base, a lower box, an upper box, a pitch shaft, an adapter shaft and a wave-absorbing mounting plate, the bottom of the lower box is provided with an azimuth shaft, the azimuth shaft is rotatably arranged on the rotating base through a slewing bearing, the upper box is arranged on the top of the lower box, the azimuth adjustment assembly for fine-tuning the initial azimuth of the lower box and the upper box is arranged between the rotating base and the lower box, the levelness adjustment assembly for fine-tuning the initial levelness of the upper box is arranged on the upper box, the pitch shaft is arranged on the front face of the upper box, the adapter shaft is connected to the pitch shaft, and the wave-absorbing mounting plate is arranged at the connecting position of the adapter shaft and the pitch shaft.

[0007] Further, the top of the lower box is provided with a connecting top plate, the bottom of the upper box is provided with a connecting bottom plate, the azimuth adjustment assembly is provided with two groups, the two groups of azimuth adjustment assemblies are arranged at the two ends of the connecting top plate on the back side of the lower box, and the levelness adjustment assembly is provided with multiple groups, and the multiple groups of levelness adjustment assemblies are arranged along the periphery of the connecting bottom plate.

[0008] Further, the azimuth adjustment assembly comprises a fixed seat, an adjusting seat, an azimuth adjusting top screw and an azimuth locking bolt, the fixed seat is arranged at the bottom of the connecting top plate, the adjusting seat is fixed to the rotating base on the side opposite to the two fixed seats, the azimuth adjusting top screw is arranged on the adjusting seat and abuts against the side wall of the fixed seat, and the azimuth locking bolt is arranged on the fixed seat and abuts against the rotating base.

[0009] Further, the levelness adjustment assembly comprises a levelness adjusting top screw and a levelness locking bolt, the levelness adjusting top screw is arranged on the connecting bottom plate and abuts against the connecting top plate, and the levelness locking bolt is arranged on the connecting bottom plate and is threadedly connected with the connecting top plate.

[0010] Further, the rotating base is provided with a mounting hole, the slewing bearing is arranged in the mounting hole, and the azimuth shaft is connected to the slewing bearing.

[0011] Further, one end of the adapter shaft is provided with a mounting flange connected with the pitch shaft, the other end of the adapter shaft is provided with an adapter flange, and the wave-absorbing mounting plate is fixedly sleeved on the mounting flange.

[0012] Further, the bottom of the rotating base and the adapter flange are both provided with recessed stops, and the mounting hole is arranged at the recessed stop on the rotating base.

[0013] Compared with the prior art, the fine-tunable quiet zone scanning frame rotating shaft has the following beneficial effects:

[0014] 1、The rotating base, the lower box, the upper box, the azimuth shaft, the slewing bearing and the azimuth adjustment assembly are arranged, so that the upper box can rotate with the lower box on the rotating base, and after the rotating shaft is assembled, the initial azimuth of the lower box and the upper box can be fine-tuned through the azimuth adjustment assembly, thereby solving the problem that the existing rotating shaft cannot fine-tune the initial azimuth.

[0015] 2. The utility model discloses a horizontal degree adjusting assembly is set up, can fine tune the horizontal degree of upper box body after rotating shaft assembly, guarantee that upper box body can keep horizontal circular motion, prevent the perpendicularity of rotating center when upper box body rotates not enough, and then solve the problem of the initial horizontal degree of the existing rotating shaft can not be fine tuned, finally through the setting of azimuth adjusting assembly and horizontal degree adjusting assembly, the structural assembly initial accuracy of rotating shaft is effectively guaranteed to satisfy modern test accuracy demand.

[0016] 3. The utility model discloses a rotating base is docked with the convex stop of the top of stand through the concave stop, and the adapter shaft is docked with the convex stop on the horizontal moving shaft through the concave stop, which guarantees the initial installation accuracy of the rotating base and the horizontal moving shaft. DRAWINGS

[0017] Figure 1 It is the overall structure perspective schematic drawing of the utility model;

[0018] Figure 2 It is the bottom structure schematic drawing of the rotating base in the utility model;

[0019] Figure 3 It is the overall structure plan view schematic drawing of the utility model;

[0020] Figure 4 It is Figure 3 It is the section structure schematic drawing in A-A direction;

[0021] Figure 5 It is Figure 4 It is the structure enlarged view schematic drawing of B in the utility model;

[0022] Figure 6 It is the structure schematic drawing of azimuth adjusting assembly in the utility model;

[0023] Figure 7 It is the structure schematic drawing of adapter shaft in the utility model.

[0024] In the drawing: 1, rotating base; 2, lower box body; 3, upper box body; 4, pitch shaft; 5, adapter shaft; 6, wave-absorbing mounting plate; 7, azimuth shaft; 8, slewing bearing; 9, connecting top plate; 10, connecting bottom plate; 11, fixed seat; 12, adjusting seat; 13, azimuth adjusting top screw; 14, azimuth locking bolt; 15, horizontal degree adjusting top screw; 16, horizontal degree locking bolt; 17, mounting flange; 18, adapter flange; 19, concave stop. DETAILED DESCRIPTION

[0025] The utility model will be further described below in connection with the drawings, but the protection scope of the utility model is not limited to the following.

[0026] For example, Figures 1-7As shown in the figure, a fine-tuning quiet zone scanning frame rotating shaft includes a rotating base 1, a lower box 2, an upper box 3, a pitch shaft 4, an adapter shaft 5, and a wave-absorbing mounting plate 6. The rotating base 1 is installed at the top of the column of the scanning frame, the lower box 2 is rotatably installed on the rotating base 1, the upper box 3 is arranged at the top of the lower box 2 and can rotate with the lower box 2, an azimuth adjustment assembly is arranged between the rotating base 1 and the lower box 2, the azimuth adjustment assembly is used for fine-tuning the initial azimuth of the lower box 2 and the upper box 3, a levelness adjustment assembly is arranged on the upper box 3, the upper box 3 is arranged on the lower box 2 through the levelness adjustment assembly, and the levelness adjustment assembly can be used for fine-tuning the initial levelness of the upper box 3, the pitch shaft 4 is installed on the front side of the upper box 3 (i.e. the side facing the radar wave direction), the adapter shaft 5 is connected to the pitch shaft 4, the transverse shaft of the scanning frame is connected to the adapter shaft 5, and the wave-absorbing mounting plate 6 for mounting the wave-absorbing material is arranged at the connection between the adapter shaft 5 and the pitch shaft 4.

[0027] As shown in the figure, Figure 1 , 2 , the bottom of the lower box 2 is fixed with an azimuth shaft 7, the base is provided with a mounting hole, a slewing bearing 8 is installed in the mounting hole, and the azimuth shaft 7 is connected to the slewing bearing 8, so that the upper box 3 can make a horizontal circular motion on the rotating base 1 with the lower box 2.

[0028] As shown in the figure, Figure 1 , Figure 3 , Figure 4 , the top of the lower box 2 is provided with a connecting top plate 9, the bottom of the upper box 3 is provided with a connecting bottom plate 10, the azimuth adjustment assembly is provided with two groups, the two groups of azimuth adjustment assemblies are arranged at the two ends of the connecting top plate 9 on the back side of the lower box 2, and the levelness adjustment assembly is provided with multiple groups, the multiple groups of levelness adjustment assemblies are arranged along the periphery of the connecting bottom plate 10, and the connecting bottom plate 10 is connected to the connecting top plate 9 through the levelness adjustment assembly.

[0029] As shown in the figure, Figure 1 , Figure 6 , the azimuth adjustment assembly includes a fixed seat 11, an adjusting seat 12, an azimuth adjusting top screw 13, and an azimuth locking bolt 14. The fixed seat 11 is fixed at the bottom of the connecting top plate 9, the adjusting seat 12 is fixed on the rotating base 1 on the side opposite to the two fixed seats 11, the azimuth adjusting top screw 13 is threadedly connected to the adjusting seat 12 and abuts against the side wall of the fixed seat 11, and the azimuth locking bolt 14 is threadedly connected to the fixed seat 11 and abuts against the rotating base 1. By screwing in and out of the two azimuth adjusting top screws 13, the azimuth adjusting top screw 13 can push the lower box 2 to rotate through the fixed seat 11, thereby realizing the azimuth adjustment of the lower box 2 and the upper box 3. After adjustment, the azimuth locking bolt 14 is tightened to abut against the fixed seat 11, the lower box 2 is locked, and the azimuth fine-tuning is completed.

[0030] As shown in the figure, Figures 3-5As shown, the leveling adjustment assembly includes a leveling adjusting screw 15 and a leveling locking bolt 16. The leveling adjusting screw 15 is threaded onto the connecting base plate 10 and abuts against the connecting top plate 9. The leveling locking bolt 16 is threaded onto both the connecting base plate 10 and the connecting top plate 9, thereby allowing the upper housing 3 to be mounted on the lower housing 2. If the lower housing 2 is not level and tilts, causing insufficient verticality of the rotation center when the lower housing 2 rotates (i.e., the levelness of the lower housing 2 is insufficient), the distance between the connecting base plate 10 and the connecting top plate 9 at different positions can be adjusted by screwing the leveling adjusting screw 15 in and out at different positions until the lower housing 2 is level. Then, the leveling locking bolt 16 is tightened to lock the upper housing 3, completing the fine-tuning of the levelness.

[0031] By incorporating the aforementioned orientation adjustment component and level adjustment component, this invention effectively ensures the initial assembly accuracy of the rotating shaft structure, thereby improving the testing accuracy during subsequent tests to meet modern testing accuracy requirements.

[0032] like Figure 2 , Figure 4 , Figure 7 As shown, one end of the adapter shaft 5 is fixed with a mounting flange 17, and the other end is fixed with an adapter flange 18. The wave-absorbing mounting plate 6 is fixedly sleeved on the mounting flange 17. Both the bottom of the rotating base 1 and the adapter flange 18 are provided with recessed stops 19, and the mounting holes are located at the recessed stops 19 on the rotating base 1. The rotating base 1 mates with the convex stop on the top of the column through the recessed stops 19, and the adapter shaft 5 mates with the convex stop on the transverse axis through the recessed stops 19, ensuring the initial installation accuracy of the rotating base 1 and the transverse axis. The adapter shaft 5 is connected to the pitch axis 4 through the mounting flange 17. The pitch axis 4 is driven by the pitch drive mechanism installed in the upper housing 3, which in turn drives the transverse axis to perform pitch movement. The cooperation between the pitch drive mechanism and the pitch axis 4 can be achieved using existing technology, and the specific structure and driving principle will not be described in detail.

[0033] The overall working principle of this utility model is as follows:

[0034] After the rotating shaft is installed with the other structures of the scanning frame, the initial flatness of the transverse axis rotation surface is detected by a remote laser tracker. If there is a deviation in orientation, first loosen the orientation locking bolt 14, then rotate the orientation adjusting screw 13 to adjust the required orientation. After adjustment, tighten the orientation locking bolt 14 to complete the initial orientation adjustment. If the verticality of the rotation center is insufficient, first loosen the leveling locking bolt 16, then rotate the leveling adjusting screw 15 to adjust the level. After adjustment, tighten the leveling locking bolt 16 to complete the leveling adjustment. Once the orientation and level are adjusted, loosen the orientation locking bolt to facilitate subsequent testing.

[0035] Finally, although the above description has shown and described the embodiments of the present application, it is understood to those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A fine-tunable dead zone scanning gantry rotation axis, characterized by: The utility model relates to a rotating base (1), lower box (2), upper box (3), pitch shaft (4), adapter shaft (5), wave absorption mounting plate (6), the bottom of lower box (2) is equipped with azimuth shaft (7), azimuth shaft (7) is rotated and is equipped with the rotary bearing (8) on rotating base (1), upper box (3) is equipped on the top of lower box (2), and the azimuth adjusting assembly for the initial azimuth of lower box (2) and upper box (3) is equipped between rotating base (1) and lower box (2), and the initial levelness of upper box (3) is adjusted to the levelness adjusting assembly of upper box (3), and pitch shaft (4) is equipped at the front of upper box (3), and adapter shaft (5) is connected to pitch shaft (4), and the connecting place of adapter shaft (5) and pitch shaft (4) is equipped with wave absorption mounting plate (6).

2. The tunable quiet zone scanner rotation axis of claim 1, wherein: The top of lower box (2) is equipped with connecting top plate (9), and the bottom of upper box (3) is equipped with connecting bottom plate (10), the azimuth adjusting assembly is equipped with two groups, and the two groups of azimuth adjusting assemblies are respectively equipped at the both ends of connecting top plate (9) on the back of lower box (2), and the levelness adjusting assembly is equipped with multiple groups, and the multiple groups of levelness adjusting assemblies are arranged along the periphery of connecting bottom plate (10).

3. The tunable quiet zone scanner rotation axis of claim 2, wherein: The azimuth adjusting assembly includes fixed seat (11), adjusting seat (12), azimuth adjusting top screw (13), azimuth locking bolt (14), fixed seat (11) is equipped at the bottom of connecting top plate (9), adjusting seat (12) is fixed on the rotating base (1) on the opposite side of two fixed seats (11), azimuth adjusting top screw (13) is equipped on adjusting seat (12) and is in contact with the side wall of fixed seat (11), and azimuth locking bolt (14) is equipped on fixed seat (11) and is in contact with rotating base (1).

4. The tunable quiet zone scanner rotation axis of claim 2, wherein: The levelness adjusting assembly includes levelness adjusting top screw (15) and levelness locking bolt (16), and levelness adjusting top screw (15) is arranged on connecting bottom plate (10) and is in contact with connecting top plate (9), and levelness locking bolt (16) is arranged on connecting bottom plate (10) and is in screw connection with connecting top plate (9).

5. The tunable quiet zone scanner rotation axis of claim 1, wherein: Rotating base (1) is equipped with mounting hole, and rotary bearing (8) is arranged in the mounting hole, and azimuth shaft (7) is connected to rotary bearing (8).

6. The tunable quiet zone scanner rotation axis of claim 5, wherein: The one end of adapter shaft (5) is equipped with mounting flange (17) connected with pitch shaft (4), and the other end of adapter shaft (5) is equipped with adapter flange (18), and wave absorption mounting plate (6) is fixedly sleeved on mounting flange (17).

7. The tunable quiet zone scanner rotation axis of claim 6, wherein: Rotating base (1) bottom and adapter flange (18) are all equipped with recessed stopper (19), and the recessed stopper (19) is arranged on rotating base (1).

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