Space intersection degree fine adjustment mechanism for rotating shaft of antenna turntable

Abstract

The invention discloses a fine adjustment mechanism for the spatial intersection degree of a rotating shaft of an antenna rotary table, relates to the field of antenna housing testing, and aims to solve the problem that more accurate adjustment is difficult to realize due to the fact that only a small amount of adjustment can be realized in X and Y directions in the conventional mode. The fine adjustment mechanism comprises a fine adjustment mechanism main body assembly which comprises an X-direction adjusting seat, an azimuth base, an azimuth adjusting seat and a pitching adjusting seat; one end face of the X-direction adjusting seat is connected with the front-back telescopic assembly, and the other end face of the X-direction adjusting seat is provided with an orientation base capable of moving along the X-direction adjusting seat. An azimuth adjusting seat capable of moving along the azimuth base is arranged on the end surface, far away from the X-direction adjusting seat, of the azimuth base; an elevation angle adjusting seat capable of moving along the azimuth adjusting seat is arranged on the end surface, far away from the azimuth base, of the azimuth adjusting seat; the end face, away from the azimuth adjusting seat, of the pitching adjusting seat is connected with the antenna rotary table. Fine fine adjustment of four degrees of freedom of X direction, Y direction, orientation and pitching is realized, and the technical problem in the field is solved.

Description

Technical Field

[0001] This document relates to the field of antenna cover testing, and in particular to a spatial intersection fine-tuning mechanism for the rotation axis of an antenna turntable. Background Art

[0002] In the field of radome and antenna testing, a multi-axis turntable is mainly used to carry the radome and antenna to be tested in space for azimuth, pitch and polarization movement to achieve electrical performance testing. The radome turntable generally has azimuth, pitch, polarization, translation and other movement axes; the antenna turntable generally has azimuth, pitch, polarization and other movement axes. When using a multi-axis turntable to drive the radome and antenna to simulate the position required for testing in space, the geometric centers of the two need to coincide as much as possible.

[0003] The existing solution is mainly to adjust the height of the antenna turntable bracket, such as adding or reducing gaskets, left and right offsets, such as using screw holes for left and right fine-tuning. The existing method can only solve a small amount of adjustment in the X and Y directions, and because the adjustment position is far away from the antenna turntable installed at the end, it is difficult to make more precise adjustments. In addition, the antenna turntable bracket is generally large in size and weight, making adjustment difficult.

[0004] Therefore, it is necessary to provide a mechanism for fine-tuning the spatial intersection of the rotation axes of an antenna turntable. Summary of the invention

[0005] The present specification provides a mechanism for fine-tuning the spatial intersection of the rotating axes of an antenna turntable, which is used to solve the problem that the existing method can only solve a small amount of adjustment in the X and Y directions, and because the adjustment position is far away from the antenna turntable installed at the end, it is difficult to achieve more precise adjustment.

[0006] This specification provides a fine-tuning mechanism for the spatial intersection of the rotation axis of an antenna turntable, including a fine-tuning mechanism main component and a front and rear telescopic component;

[0007] The main assembly of the fine-tuning mechanism is used to adjust the azimuth axis and elevation axis of the antenna turntable;

[0008] The main assembly of the fine-tuning mechanism includes, in order of installation, an X-axis adjustment seat, an azimuth base, an azimuth adjustment seat and a pitch adjustment seat;

[0009] One end surface of the X-axis adjustment seat is connected to the front-rear telescopic assembly, and the other end surface of the X-axis adjustment seat is provided with an azimuth base that can move along it;

[0010] The azimuth adjustment seat capable of moving along the end surface of the azimuth base away from the X-axis adjustment seat is provided, and the elevation adjustment seat capable of moving along the end surface of the azimuth adjustment seat away from the azimuth base is provided;

[0011] The end surface of the pitch adjustment seat away from the azimuth adjustment seat is connected to the antenna turntable.

[0012] In some preferred embodiments, one end surface of the X-axis adjustment seat is fixed to the front and rear telescopic assembly, and its specific structure is:

[0013] The front and rear telescopic assembly includes a mounting seat, a linear guide assembly, a translation drive assembly, and a fixed seat;

[0014] The fixing seat comprises a mounting flange surface and a positioning circular stopper, wherein the mounting flange surface and the positioning circular stopper are used to fix the fixing seat to the upper mounting bracket;

[0015] A translation drive assembly is installed on the fixed seat, and the translation drive assembly is used to drive the linear guide rail assembly to move linearly, and the linear guide rail assembly is fixed to the mounting seat;

[0016] The mounting seat includes a flange fixed to baffles on both sides of the flange, the flange is fixed to one side of the adjustment block, the other side of the adjustment block is fixed to the X-axis adjustment seat, and the baffle is used to limit the X-axis adjustment seat;

[0017] The side surface where the short side of the X-axis adjustment seat is located is matched with the baffle with a small gap, and the side surface can move along the baffle. One end surface of the X-axis adjustment seat is in contact with the surface of the flange and can move along it.

[0018] In some preferred embodiments, the other end surface of the X-axis adjustment seat is provided with an azimuth base that can move along the other end surface, and the specific structure thereof is as follows:

[0019] A first Y-direction adjustment surface and a first Y-direction positioning guide groove are provided on the other end surface of the X-direction adjustment seat; a second Y-direction adjustment surface and a second Y-direction positioning guide groove are provided on one end surface of the azimuth base;

[0020] The second Y-direction adjustment surface matches with the first Y-direction adjustment surface, and the second Y-direction positioning guide groove matches with the first Y-direction positioning guide groove and moves along it.

[0021] In some preferred embodiments, the azimuth adjustment seat capable of moving along the end surface of the azimuth base away from the X-axis adjustment seat is provided, and its specific structure is as follows:

[0022] A first azimuth adjustment arc surface and a first azimuth positioning guide groove are provided on the end surface of the azimuth base away from the X-axis adjustment seat; a second azimuth adjustment arc surface and a second azimuth positioning guide groove are provided on one end surface of the azimuth adjustment seat;

[0023] The first orientation adjustment arc surface matches the second orientation adjustment arc surface, and the first orientation positioning guide groove is provided with the second orientation positioning guide groove along which the second orientation positioning guide groove can move;

[0024] An azimuth fine-adjusting top block is fixed between the second azimuth positioning guide grooves, and the azimuth fine-adjusting top block is used for adjusting the azimuth angle by means of a top screw.

[0025] In some preferred embodiments, an elevation adjustment seat capable of moving along the azimuth adjustment seat is provided on the end surface of the azimuth adjustment seat away from the azimuth base, and its specific structure is as follows:

[0026] The end surface of the azimuth adjustment seat away from the azimuth base is provided with a first pitch adjustment arc surface and a first pitch positioning guide groove; the elevation adjustment seat is provided with a second pitch adjustment arc surface and a second pitch positioning guide groove;

[0027] The first pitch adjustment arc surface matches the second pitch adjustment arc surface, and a second pitch positioning guide groove capable of moving along the first pitch positioning guide groove is arranged in the first pitch positioning guide groove.

[0028] In some preferred embodiments, an antenna turntable mounting surface is provided on an end surface of the elevation adjustment seat on a side away from the azimuth adjustment seat;

[0029] The antenna turntable mounting surface is used for mounting the antenna turntable.

[0030] In some preferred embodiments, the fine-tuning mechanism main body assembly further includes a fine-tuning screw, an azimuth screw washer, a pitch screw washer and a locking screw;

[0031] The fine-tuning screws are provided in at least three groups, one of which is threadedly connected to the adjustment block and abuts against the side end surface of the azimuth base to achieve mobile fixing of the azimuth base;

[0032] Another group of the fine-tuning screws is threadedly connected to the two side surfaces of the azimuth adjustment seat and abuts against the elevation adjustment seat, so as to realize the movable fixing of the elevation adjustment seat;

[0033] The third group of fine-tuning screws are threadedly connected to the two side surfaces of the second Y-direction positioning guide groove, and abut against the azimuth fine-tuning top block, so as to achieve fine-tuning in azimuth;

[0034] The locking screws are provided in at least two groups, one of which passes through the azimuth base and is threadedly connected to the first Y-direction adjustment surface through the azimuth screw gasket;

[0035] Another group of locking screws passes through the azimuth adjustment seat and is threadedly connected to the elevation adjustment seat through the pitch screw gasket.

[0036] In some preferred embodiments, the antenna turntable is provided with a fixing seat; the antenna turntable is fixed to the pitch adjustment seat through the antenna turntable fixing seat, the axial position is locked by a first circular stop, and is fixed to the mounting surface by a locking screw, and the first circular stop is opened on the pitch adjustment seat.

[0037] In some preferred embodiments, a second circular stop is provided on the fixing seat, and a slight adjustment of the polarization direction is achieved on the front end circular stop of the turntable integral bracket through the second circular stop, and the front end circular stop is provided on the turntable integral bracket.

[0038] In some preferred embodiments, a radome turntable is further provided in the circumferential direction of the fine-tuning mechanism main body assembly.

[0039] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:

[0040] 1. The main assembly of the fine-tuning mechanism in the present invention realizes the fine-tuning of four degrees of freedom, namely, X-direction, Y-direction, azimuth and pitch, within a compact space size range, thus solving the technical problems in this field;

[0041] 2. The fine-tuning mechanism of the present invention integrates the matching surface, positioning stop, locking screw operation space, fine-tuning top screw and the bearing structure body required for the adjustment of each degree of freedom. Each structure adopts an integrated design, and the multi-degree-of-freedom adjustment movement required for fine-tuning is transmitted to the end with the least amount of mechanism, thereby compressing the space occupation to the greatest extent.

[0042] 3. The present invention concentrates almost all fine-tuning mechanisms at the position closest to the antenna turntable, significantly reducing the load requirements of each component. The adjustment torque and locking torque required for fine-tuning of each link can be minimized, and a single person can operate it, which is conducive to the fine-tuning process.

[0043] 4. The Z-direction adjustment in this fine-tuning mechanism is combined with the front and rear telescopic movement, which is convenient for replacing the product to be tested during the test and also saves a separate adjustment mechanism;

[0044] 5. The present invention has good scalability. According to the size constraints of the radome turntable and the antenna turntable, the radius values ​​of the azimuth and pitch can be adjusted while the structural form remains unchanged, so as to adapt to more test systems;

[0045] 6. The fine adjustment of each motion axis in the present invention is independent of each other and can be adjusted individually according to the measured value of the spatial geometric quantity without worrying about the motion coupling between the motion axes;

[0046] 7. The present invention is driven by the minimum Z-direction dimension, which helps to minimize the eccentric torque after the antenna turntable is installed, so that the torque required for locking each motion axis can also be reduced, thereby reducing the size of the screws, so that the adjustment mechanism occupies as small a space volume as possible in the entire test turntable system, and does not affect the main motion function of the antenna turntable and the radome turntable (minimizing the possibility of interference); (This item cannot be disassembled because the adjustment mechanism needs to remain in this state after being positioned in the test space. If the size is large, it may interfere with the movement of the antenna and radome turntable)

[0047] 8. Each fine-tuning mechanism of the present invention adopts the form of double-sided fine-tuning screws. After determining the adjustment direction, first loosen the fine-tuning screw opposite to the pre-adjustment direction, and then tighten the fine-tuning screw in the positive direction. The operation can be repeated according to the adjustment amount. This method can ensure that the fine-tuning value of each motion axis is locked;

[0048] 9. The drive assembly of the antenna turntable telescopic mechanism in the present invention adopts a self-locking drive. After the telescopic value is determined, a hand wheel is used for adjustment to avoid reverse displacement caused by disturbances in the turntable movement and ensure that the Z-axis position is at the locked value. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0050] Figure 1 A schematic diagram of the spatial intersection fine-tuning mechanism of the antenna turntable rotation axis and the overall structure and motion axis of the antenna cover turntable and antenna turntable provided in this specification;

[0051] Figure 2 A schematic diagram of the X\Y position relationship of the spatial intersection fine-tuning mechanism of the antenna turntable rotation axis provided in this specification;

[0052] Figure 3 The overall structure of a spatial intersection fine-tuning mechanism for the rotation axis of an antenna turntable provided in this specification is schematically shown;

[0053] Figure 4 A schematic diagram of the main assembly of a fine-tuning mechanism for the spatial intersection fine-tuning mechanism of the rotation axis of an antenna turntable provided in this specification;

[0054] Figure 5 A schematic diagram of a fine-tuning mechanism main body group and azimuth and pitch motion center plane of a fine-tuning mechanism for the spatial intersection of the rotation axis of an antenna turntable provided in this specification;

[0055] Figure 6 A schematic diagram of the pitch adjustment seat structure of a spatial intersection fine-tuning mechanism for the rotation axis of an antenna turntable provided in this specification;

[0056] Figure 7 A schematic diagram of the structure of a spatial intersection fine-tuning mechanism for the rotation axis of an antenna turntable provided in this specification;

[0057] Figure 8 A schematic diagram of the azimuth base structure of a spatial intersection fine-tuning mechanism for an antenna turntable rotation axis provided in this specification;

[0058] Fig. 9 A schematic diagram of the structure of an X-axis adjustment seat of a spatial intersection fine-tuning mechanism for a rotating axis of an antenna turntable provided in this specification;

[0059] Fig.10 A schematic diagram of the structure of the front and rear telescopic components of a spatial intersection fine-tuning mechanism of a rotating axis of an antenna turntable provided in this specification;

[0060] Fig.11 A schematic diagram of the pitch center cross-sectional structure of a spatial intersection fine-tuning mechanism for an antenna turntable rotation axis provided in this specification;

[0061] Fig.12 This specification provides a schematic diagram of the azimuth center cross-sectional structure of a spatial intersection fine-tuning mechanism for an antenna turntable rotation axis. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0063] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0064] The present invention proposes a fine-tuning mechanism for the spatial intersection of the rotation axis of an antenna turntable, comprising a fine-tuning mechanism main component 1 and a front and rear telescopic component 2;

[0065] The fine-tuning mechanism main body assembly 1 is used to adjust the azimuth axis and elevation axis of the antenna turntable B;

[0066] The main assembly 1 of the fine-tuning mechanism includes, in order of installation, an X-axis adjustment seat 11, an azimuth base 12, an azimuth adjustment seat 13 and a pitch adjustment seat 14;

[0067] One end surface of the X-axis adjustment seat 11 is connected to the front-rear telescopic assembly 2, and the other end surface of the X-axis adjustment seat 11 is provided with an azimuth base 12 that can move along it;

[0068] The azimuth adjustment seat 13 capable of moving along the end surface of the azimuth base 12 away from the X-direction adjustment seat 11 is provided, and the elevation adjustment seat 14 capable of moving along the end surface of the azimuth adjustment seat 13 away from the azimuth base 12 is provided;

[0069] The end surface of the pitch adjustment seat 14 away from the azimuth adjustment seat 13 is connected to the antenna turntable B.

[0070] Among them, the present invention provides a multi-degree-of-freedom micro-adjustment mechanism for an antenna turntable near the end, which can adjust the inevitable geometric precision error caused by the complex structure to a very small range. The present invention can perform micro-adjustments in the six degrees of freedom of the X direction, Y direction, Z direction, azimuth rotation, pitch rotation and polarization rotation, so that the azimuth axis, pitch axis and polarization axis of the antenna turntable coincide with the azimuth axis, pitch axis and polarization axis of the radome turntable as much as possible, and the rotation center of the antenna turntable coincides with the rotation center of the radome turntable as much as possible.

[0071] Specifically, the present invention has an antenna turntable mounting flange as the front end, and in terms of structural layout, it includes a pitch adjustment seat 14, an azimuth adjustment seat 13, an azimuth base 12, an X-axis adjustment seat 11, and a front and rear telescopic assembly 2. Each adjustment seat has a mounting surface and positioning guide constraints required for fine-tuning of two degrees of freedom.

[0072] The front mounting surface and the round stopper of the pitch adjustment seat 14 can be used for the antenna turntable base to make micro-adjustments in the polarization direction; the pitch adjustment seat 14 as a whole can make micro-adjustments in the pitch direction; the front end of the azimuth adjustment seat 13 is the mounting surface and the positioning guide groove for the pitch adjustment seat 14 to make micro-adjustments in the pitch direction, and the whole can make micro-adjustments in the azimuth direction; the front end of the azimuth base 12 is the mounting surface and the positioning guide groove for the azimuth adjustment seat 12 to make micro-adjustments in the azimuth direction, and the whole can make micro-adjustments in the Y direction;

[0073] The front end of the X-axis adjustment seat 11 is the mounting surface and positioning guide groove for the azimuth base 12 to perform Y-axis fine-tuning, and the whole can be slightly adjusted in the X direction; the front end of the front and rear telescopic components 2 is the mounting surface and positioning guide groove for the X-axis adjustment seat 11 to perform X-axis fine-tuning; the adjustment mechanism mounting seat 21 in the front and rear telescopic components 2 can be translated in the front and rear direction, i.e., the Z direction, along the linear guide rail component 22 under the drive of the translation drive component 23; the Z-axis translation can be a movement with a larger stroke.

[0074] As a further explanation of the present invention, one end surface of the X-axis adjustment seat 11 is fixed to the front and rear telescopic assembly 2, and its specific structure is as follows:

[0075] The front-rear telescopic assembly 2 includes a mounting seat 21, a linear guide assembly 22, a translation drive assembly 23, and a fixing seat 24;

[0076] The fixing seat 24 includes a mounting flange surface 241 and a positioning circular stop 242, wherein the mounting flange surface 241 and the positioning circular stop 242 are used to fix the fixing seat 24 to the upper mounting bracket;

[0077] The fixing seat 24 is provided with a translation driving assembly 23, wherein the translation driving assembly 23 is used to drive the linear guide rail assembly 22 to move linearly, and the linear guide rail assembly 22 is fixed to the mounting seat 21;

[0078] The mounting seat 21 includes a flange 211 fixed to baffles 212 on both sides of the flange 211, the flange 211 is fixed to one side of the adjustment block 15, and the other side of the adjustment block 15 is fixed to the X-direction adjustment seat 11, and the baffle 211 is used to limit the X-direction adjustment seat 11;

[0079] The side surface 114 where the short side of the X-axis adjustment seat 11 is located is matched with the baffle 211 with a small gap, and the side surface 114 can move along the baffle 211. An end surface 113 of the X-axis adjustment seat 11 is in contact with the surface of the flange 211 and can move along it.

[0080] The fixing seat 24 of the front and rear telescopic assembly 2 has a round stop, and a slight adjustment of the polarization direction can be performed on the front round stop C1 of the turntable integral bracket C.

[0081] Among them, the side surface 114 and the baffle 211 are matched with a small gap, that is, the X-axis adjustment seat 11 is located between the baffle 212 at the front end of the mounting seat 21, and lateral displacement can be achieved; and the flange 211 is the matching surface between the two, which can constrain the position relationship in the front and rear directions; the flange 211 and the matching end face 113 are both finely machined surfaces; similarly, the side surface 114 and the matching baffle 212 are also finely machined surfaces to achieve precise matching with each other.

[0082] In this embodiment, the upper mounting bracket is an integral bracket C of the turntable.

[0083] The X-direction adjustment seat 11 and the mounting seat 21 are precisely matched with upper and lower guide grooves in the X direction, and oblong screw holes are reserved on both sides for locking. Precise adjustment is performed using adjustment blocks 15 fixed on both sides of the mounting seat 21.

[0084] As a further explanation of the present invention, the other end surface of the X-axis adjustment seat 11 is provided with an azimuth base 12 that can move along the X-axis adjustment seat 11, and its specific structure is as follows:

[0085] The other end surface of the X-direction adjustment seat 11 is provided with a first Y-direction adjustment surface 111 and a first Y-direction positioning guide groove 112; the one end surface of the azimuth base 12 is provided with a second Y-direction adjustment surface 123 and a second Y-direction positioning guide groove 124;

[0086] The second Y-direction adjustment surface 123 matches with the first Y-direction adjustment surface 111 , and the second Y-direction positioning guide groove 124 matches with the first Y-direction positioning guide groove 112 and moves along it.

[0087] As a further explanation of the present invention, the end surface of the azimuth base 12 away from the X-axis adjustment seat 11 is provided with the azimuth adjustment seat 13 which can move along the azimuth base 12, and its specific structure is as follows:

[0088] The end surface of the azimuth base 12 away from the X-axis adjustment seat 11 is provided with a first azimuth adjustment arc surface 121 and a first azimuth positioning guide groove 122; the end surface of the azimuth adjustment seat 13 is provided with a second azimuth adjustment arc surface 133 and a second azimuth positioning guide groove 134;

[0089] The first orientation adjustment arc surface 121 and the second orientation adjustment arc surface 133 are matched, and the first orientation positioning guide groove 122 is provided with the second orientation positioning guide groove 134 which can move along the first orientation positioning guide groove 122;

[0090] An azimuth fine-adjustment top block 19 is fixed between the second azimuth positioning guide grooves 134 , and the azimuth fine-adjustment top block 19 is used for adjusting the azimuth angle by means of a top screw.

[0091] As a further explanation of the present invention, the end surface of the azimuth adjustment seat 13 away from the azimuth base 12 is provided with an elevation adjustment seat 14 that can move along the azimuth adjustment seat 13, and its specific structure is as follows:

[0092] The end surface of the azimuth adjustment seat 13 away from the azimuth base 12 is provided with a first pitch adjustment arc surface 131 and a first pitch positioning guide groove 132; the elevation adjustment seat 14 is provided with a second pitch adjustment arc surface 143 and a second pitch positioning guide groove 144;

[0093] The first pitch adjustment arc surface 131 and the second pitch adjustment arc surface 143 match each other, and a second pitch positioning guide groove 144 that can move along the first pitch positioning guide groove 132 is disposed in the first pitch positioning guide groove 132 .

[0094] As a further explanation of the present invention, an antenna turntable mounting surface 142 is provided on the end surface of the elevation adjustment seat 14 on the side away from the azimuth adjustment seat 13;

[0095] The antenna turntable mounting surface 142 is used to mount the antenna turntable B.

[0096] As a further explanation of the present invention, the fine-tuning mechanism main body assembly 1 further includes a fine-tuning screw 16, an azimuth screw washer 17, a pitch screw washer 18 and a locking screw 120;

[0097] The fine-tuning screws 16 are provided in at least three groups, one of which is threadedly connected to the adjustment block 15 and abuts against the side end surface of the azimuth base 12 to achieve mobile fixing of the azimuth base 12;

[0098] Another group of the fine-tuning screws 16 are threadedly connected to the two side surfaces of the azimuth adjustment seat 13 and abut against the elevation adjustment seat 14 to achieve adjustable fixation of the elevation adjustment seat 14;

[0099] The third group of fine-tuning screws 16 are threadedly connected to the two side surfaces of the second Y-direction positioning guide groove 124, and abut against the azimuth fine-tuning top block 19, so as to achieve fine-tuning in azimuth;

[0100] At least two groups of locking screws 120 are provided, and one group passes through the orientation base 12 and is threadedly connected to the first Y-direction adjustment surface 111 through the orientation screw gasket 17;

[0101] Another set of locking screws 120 passes through the azimuth adjustment seat 13 and is threadedly connected to the elevation adjustment seat 14 through the pitch screw gasket 18 .

[0102] Among them, it is used to achieve fine adjustment in azimuth, specifically: when adjusting in the positive direction of azimuth, loosen the fine-tuning screw 16 on the positive side outward by one or two pitches, and then tighten the fine-tuning screw 16 on the opposite side to the positive side by one or two pitches until the top arc surface of the fine-tuning screw 16 contacts the corresponding side surface of the azimuth fine-tuning top block 19, and repeat this process according to the measured value to adjust to the required position; if directional operation is required, just follow the above steps in reverse.

[0103] Among them, the fine-tuning screw 16 adopts a standard fine thread, the top is a finely machined spherical surface, and the tail is a standard screw head; the fine-tuning screw hole reserved in the adjustment block 15 adopts a fine thread profile consistent with the fine-tuning screw 16, which is convenient for fine-tuning and locking the adjustment amount; the adjustment block 15 in the present invention can use a separate part if the size and space permit, and can be integrally formed with the adjustment seat body when the space is narrow.

[0104] As a further explanation of the present invention, the antenna turntable B is provided with a fixing seat B4; the antenna turntable B is fixed on the pitch adjustment seat 14 through the antenna turntable fixing seat B4, the axial position is locked by the first circular stop 141, and is fixed to the mounting surface 142 by a locking screw, and the first circular stop 141 is opened on the pitch adjustment seat 14.

[0105] As a further explanation of the present invention, a second circular stop is provided on the fixing seat 24, and a slight adjustment of the polarization direction is achieved on the front end circular stop C1 of the turntable integral bracket C through the second circular stop. The front end circular stop C1 is provided on the turntable integral bracket C.

[0106] Among them, in this embodiment, the antenna turntable B mainly includes an antenna azimuth axis B1, an antenna pitch axis B2, an antenna polarization axis B3, an antenna turntable fixing seat B4, and an antenna turntable rotation center BO;

[0107] The antenna turntable B is fixed to the pitch adjustment seat 14 through the antenna turntable fixing seat B4, the axial position is locked by the first round stop 141, and is fixed to the antenna turntable mounting surface 142 by the locking screw;

[0108] The antenna turntable integral bracket C comprises a front circular stopper C1, a mounting surface C2, and a bracket body C3; the specific structure of the antenna turntable integral bracket C is prior art and will not be described in detail here.

[0109] As a further explanation of the present invention, a radome turntable D is also provided in the circumferential direction of the fine-tuning mechanism main body assembly 1 .

[0110] The radome turntable D includes a radome azimuth axis D1, a radome pitch axis D2, a radome polarization axis D3, and a radome rotation center DO; the specific structure of the radome turntable D is prior art and will not be described in detail here.

[0111] Among them, in this embodiment, the radome rotation center DO corresponds to the antenna turntable rotation center BO, and the radome azimuth axis D1, the radome pitch axis D2, and the radome polarization axis D3 correspond to the antenna azimuth axis B1, the antenna pitch axis B2, and the antenna polarization axis B3 respectively.

[0112] The present invention comprises the following method during production and processing:

[0113] Taking the outer envelope of antenna turntable B and the rotation radius of the motion axis as the driving dimensions, the round stop size, the pitch adjustment surface radius, and the azimuth adjustment surface radius of the main assembly of the fine-tuning mechanism are determined in sequence according to the principle of top-down;

[0114] Combined with the adjustment amount required for fine-tuning (e.g., the angle value can be set to 2°, and the linear motion amount can be set to ±3mm), determine the overall size envelope of the main assembly of the fine-tuning mechanism;

[0115] All structures need to be designed synchronously using a unified coordinate system and dimension drive;

[0116] Calculate the stress of the main components of the fine-tuning mechanism according to the weight of the antenna turntable B and the product to be tested, and use simulation calculations. Design the approximate structure of each adjustment structure based on the simulation results combined with the aforementioned size envelope;

[0117] According to the size and operating space of the fine-tuning screw 16 and the locking screw 120, combined with the adjustment amount, the size of each positioning guide groove and the size of the matching surface in pitch, azimuth, X and Y directions are determined within the size envelope of the main component of the fine-tuning mechanism;

[0118] After determining the size, select a reasonable level of matching accuracy based on the adjustment accuracy;

[0119] All structures of the main components of the fine-tuning mechanism can be precisely machined by a 5-axis machining center to ensure that each mating surface can be finished in one clamping to achieve the highest dimensional accuracy and shape and position accuracy; if necessary, the mating surface can be ground and surface hardened;

[0120] The fine-thread fine-tuning screw 16 can be formed by secondary processing of a standard small-pitch screw, and the SR end face is mainly processed at the front end to facilitate point-to-surface contact with the part to be adjusted;

[0121] Correspondingly, the fine-tuning screw hole of the adjustment block 15 adopts a matching pitch;

[0122] The geometric measurements required for adjustment can be made using a laser tracker or an optical prism.

[0123] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A spatial intersection fine-tuning mechanism for the rotation axis of an antenna turntable, characterized in that: It comprises a fine-tuning mechanism main body component (1) and a front and rear telescopic component (2); The fine-tuning mechanism main body component (1) is used to adjust the azimuth axis and elevation axis of the antenna turntable (B); The fine adjustment mechanism main body assembly (1) comprises, in order of installation, an X-axis adjustment seat (11), an azimuth base (12), an azimuth adjustment seat (13) and a pitch adjustment seat (14); One end surface of the X-direction adjustment seat (11) is connected to the front-rear telescopic assembly (2), and the other end surface of the X-direction adjustment seat (11) is provided with an azimuth base (12) that can move along the same; The azimuth adjustment seat (13) capable of moving along the end surface of the azimuth base (12) away from the X-direction adjustment seat (11) is provided, and the elevation adjustment seat (14) capable of moving along the end surface of the azimuth adjustment seat (13) away from the azimuth base (12) is provided; The end surface of the pitch adjustment seat (14) away from the azimuth adjustment seat (13) is connected to the antenna turntable (B).

2. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 1 is characterized in that: One end surface of the X-axis adjustment seat (11) is fixed to the front and rear telescopic assembly (2), and its specific structure is as follows: The front-rear telescopic assembly (2) comprises a mounting seat (21), a linear guide assembly (22), a translation drive assembly (23), and a fixing seat (24); The fixing seat (24) comprises a mounting flange surface (241) and a positioning circular stopper (242), wherein the mounting flange surface (241) and the positioning circular stopper (242) are used to fix the fixing seat (24) to the upper mounting bracket; A translation drive assembly (23) is mounted on the fixed seat (24), wherein the translation drive assembly (23) is used to drive the linear guide assembly (22) to move linearly, and the linear guide assembly (22) is fixed to the mounting seat (21); The mounting seat (21) comprises a flange (211) and baffles (212) fixed on both sides of the flange (211); the flange (211) is fixed to one side of the adjustment block (15); the other side of the adjustment block (15) is fixed to the X-direction adjustment seat (11); and the baffles (211) are used to limit the X-direction adjustment seat (11); The side surface (114) where the short side of the X-axis adjustment seat (11) is located is matched with the baffle (211) with a small gap, and the side surface (114) can move along the baffle (211); an end surface (113) of the X-axis adjustment seat (11) is in contact with the surface of the flange (211) and can move along it.

3. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 2 is characterized in that: The other end surface of the X-axis adjustment seat (11) is provided with an azimuth base (12) that can move along the X-axis adjustment seat (11), and its specific structure is as follows: A first Y-direction adjustment surface (111) and a first Y-direction positioning guide groove (112) are provided on the other end surface of the X-direction adjustment seat (11); a second Y-direction adjustment surface (123) and a second Y-direction positioning guide groove (124) are provided on one end surface of the azimuth base (12); The second Y-direction adjustment surface (123) matches with the first Y-direction adjustment surface (111), and the second Y-direction positioning guide groove (124) matches with the first Y-direction positioning guide groove (112) and moves along it.

4. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 3 is characterized in that: The azimuth adjustment seat (13) capable of moving along the end surface of the azimuth base (12) away from the X-direction adjustment seat (11) is provided, and its specific structure is as follows: A first azimuth adjustment arc surface (121) and a first azimuth positioning guide groove (122) are provided on the end surface of the azimuth base (12) away from the X-axis adjustment seat (11); a second azimuth adjustment arc surface (133) and a second azimuth positioning guide groove (134) are provided on one end surface of the azimuth adjustment seat (13); The first orientation adjustment arc surface (121) and the second orientation adjustment arc surface (133) cooperate with each other, and the first orientation positioning guide groove (122) is provided with the second orientation positioning guide groove (134) along which the second orientation positioning guide groove (134) can move; An azimuth fine-adjustment top block (19) is fixed between the second azimuth positioning guide grooves (134), and the azimuth fine-adjustment top block (19) is used to adjust the azimuth angle by means of a top screw.

5. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 4, characterized in that: An elevation adjustment seat (14) capable of moving along the azimuth adjustment seat (13) is arranged on the end surface away from the azimuth base (12), and the specific structure thereof is as follows: The end surface of the azimuth adjustment seat (13) away from the azimuth base (12) is provided with a first pitch adjustment arc surface (131) and a first pitch positioning guide groove (132); the elevation adjustment seat (14) is provided with a second pitch adjustment arc surface (143) and a second pitch positioning guide groove (144); The first pitch adjustment arc surface (131) and the second pitch adjustment arc surface (143) are matched with each other, and a second pitch positioning guide groove (144) capable of moving along the first pitch positioning guide groove (132) is arranged in the first pitch positioning guide groove (132).

6. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 5, characterized in that: An antenna turntable mounting surface (142) is provided on the end surface of the elevation adjustment seat (14) on a side away from the azimuth adjustment seat (13); The antenna turntable mounting surface (142) is used for mounting the antenna turntable (B).

7. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 6, characterized in that: The fine-tuning mechanism main body component (1) further comprises a fine-tuning screw (16), an azimuth screw gasket (17), a pitch screw gasket (18) and a locking screw (120); At least three groups of the fine-tuning screws (16) are provided, one of which is threadedly connected to the adjustment block (15) and abuts against the side end surface of the azimuth base (12) to achieve mobile fixing of the azimuth base (12); Another group of the fine-tuning screws (16) are threadedly connected to the two side surfaces of the azimuth adjustment seat (13) and abut against the elevation adjustment seat (14) to achieve adjustable fixation of the elevation adjustment seat (14); The third group of fine-tuning screws (16) are threadedly connected to the two side surfaces of the second Y-direction positioning guide groove (124) and abut against the azimuth fine-tuning top block (19) to achieve fine-tuning in azimuth. The locking screws (120) are provided in at least two groups, one of which passes through the azimuth base (12) and is threadedly connected to the first Y-direction adjustment surface (111) through the azimuth screw gasket (17). Another set of locking screws (120) passes through the azimuth adjustment seat (13) and is threadedly connected to the elevation adjustment seat (14) through the pitch screw gasket (18).

8. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 7, characterized in that: The antenna turntable (B) is provided with a fixing seat (B4); the antenna turntable (B) is fixed on the pitch adjustment seat (14) through the antenna turntable fixing seat (B4), the axial position is locked through a first circular stop (141), and is fixed on the mounting surface (142) by a locking screw, and the first circular stop (141) is opened on the pitch adjustment seat (14).

9. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 8, characterized in that: The fixing seat (24) is provided with a second circular stop, through which a slight adjustment of the polarization direction can be made on the front circular stop (C1) of the turntable integral bracket (C), and the front circular stop (C1) is provided on the turntable integral bracket (C).

10. The antenna turntable rotation axis spatial intersection fine-tuning mechanism according to claim 9, characterized in that: A radome turntable (D) is also provided in the circumferential direction of the fine-tuning mechanism main body component (1).

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