Three-axis linkage satellite antenna adjusting mechanism

Abstract

The utility model discloses a three-axis linkage satellite antenna adjusting mechanism, and relates to the field of satellite communication, so that the satellite antenna adjusting mechanism is convenient to carry, store, operate and adjust in multiple degrees of freedom. The adjusting mechanism comprises a foldable support and a three-axis driving mechanism formed by sequentially connecting an orientation adjusting assembly, a pitching adjusting assembly and a polarization adjusting assembly, the orientation adjusting assembly is connected with the support, and the polarization adjusting assembly is used for being connected with an antenna load; the orientation adjusting assembly, the pitching adjusting assembly and the polarization adjusting assembly are internally provided with communicated wiring channels. The adjusting mechanism has the advantages of being simple in structure, light in weight, small in storage size, convenient to operate, attractive in structure and safe to use, and high-precision adjustment on the three freedom degrees of orientation, pitching and polarization can be achieved.

Description

Technical Field

[0001] The utility model relates to a satellite communication facility, in particular to a three-axis linkage satellite antenna adjusting mechanism. Background Art

[0002] For traditional satellite communication antennas to transmit signals to satellites, the satellite communication antennas need to be aligned with the satellites to achieve signal transmission. If there is a deviation in the alignment direction, the communication effect will be affected, and in severe cases, the communication will be interrupted. The higher the antenna frequency, the narrower the antenna beam width. Therefore, the higher the antenna frequency, the smaller the range of the angle to the satellite, and the higher the accuracy requirements for the servo mechanism. So, the requirements for the automatic satellite acquisition of antenna equipment are also getting higher and higher.

[0003] With the continuous development of the satellite communication field, satellite communication facilities are increasingly developing towards the trend of being lightweight and portable. In order to enable satellite antenna users to obtain a better user experience and enhance the core competitiveness of products, higher requirements are put forward for the portability and operability of satellite antennas. Summary of the Utility Model

[0004] The invention object of the utility model is to provide a three-axis linkage satellite antenna adjusting mechanism for the above problems, so that the satellite antenna adjusting structure is convenient to carry, store, operate and adjust in multiple degrees of freedom.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A three-axis linkage satellite antenna adjusting mechanism, which comprises:

[0007] A retractable bracket;

[0008] A three-axis drive mechanism formed by sequentially connecting an azimuth adjusting component, an elevation adjusting component and a polarization adjusting component. The azimuth adjusting component is connected to the bracket, and the polarization adjusting component is used to connect an antenna load;

[0009] A communication wire routing channel is arranged inside the azimuth adjusting component, the elevation adjusting component and the polarization adjusting component.

[0010] Further, the elevation adjusting component is connected to the end of the azimuth adjusting component, and the rotation axis of the elevation adjusting component is perpendicular to the rotation axis of the azimuth adjusting component;

[0011] The polarization adjusting component is connected to the circumference of the rotation axis of the elevation adjusting component, and the rotation axis of the polarization adjusting component is perpendicular to the rotation axis of the elevation adjusting component.

[0012] Further, the pitching rotation assembly includes a T-shaped box, in which a pitching joint module is installed. The pitching rotation output shaft of the pitching joint module is connected to a pitching end cover at one end of the cross arm of the T-shaped box. A bearing is installed at the other end of the cross arm of the T-shaped box, which is coaxially arranged with the output shaft of the pitching joint module. A pitching wire passing shaft is connected to the bearing, and the pitching wire passing shaft extends outside the cross arm of the T-shaped box and is connected to a wire outlet cover. The pitching wire passing shaft and the wire outlet cover serve as the wire routing channels of the pitching rotation assembly; the polarization adjustment assembly is respectively connected to the pitching end cover and the wire outlet cover at both ends of the cross arm of the T-shaped box from the circumferential direction of the rotation shaft of the pitching adjustment assembly.

[0013] Further, the polarization adjustment assembly includes a polarization base and a polarization mounting base;

[0014] The polarization base is respectively connected to the pitching end cover and the wire outlet cover from both sides of the cross arm axis of the T-shaped box; a polarization motor module is installed in the polarization mounting base, and the polarization rotation output shaft of the polarization motor module is connected to the polarization base;

[0015] A polarization wire protection sleeve is arranged on the central axis of the polarization motor module, serving as the wire routing channel inside the polarization motor module; the wire routing channels in the polarization base are respectively communicated with the wire outlet cover and the polarization wire protection sleeve.

[0016] Further, a first limiting structure is arranged between the polarization mounting base and the polarization base, and the first limiting structure includes a mutually cooperating first arc-shaped chute and a first limiting pin.

[0017] Further, a second limiting structure is arranged between the polarization base and the cross arm of the T-shaped box, and the second limiting structure includes a mutually cooperating second arc-shaped chute and a second limiting pin.

[0018] Further, the wire routing channels in the polarization base adopt flexible printed circuit boards for wire routing.

[0019] Further, the polarization motor module includes a servo motor, a motor adapter plate, a harmonic reducer and the polarization rotation output shaft connected in sequence; the servo motor is installed on a polarization motor base, and the polarization motor base is connected to the polarization mounting base.

[0020] Further, the azimuth adjustment assembly includes an azimuth mounting base and an azimuth motor module, and the azimuth mounting base is connected to the bracket;

[0021] The azimuth motor module is installed inside the long arm of the T-shaped box, and the azimuth rotation output shaft of the azimuth motor module is connected to the azimuth mounting base.

[0022] Further, the azimuth mounting base is coaxially connected to the long arm of the T-shaped box;

[0023] An azimuth wire protection sleeve is arranged on the central axis of the azimuth motor module, serving as a wiring channel for the azimuth adjustment component;

[0024] A conductive slip ring is coaxially connected inside the azimuth adjustment component, and a wire harness of the conductive slip ring is routed through the azimuth wire sheath.

[0025] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0026] The three-axis linkage satellite antenna adjustment mechanism of this design can realize the combined adjustment of the satellite antenna in three degrees of freedom: pitch, azimuth and polarization, and has strong operability for satellite alignment. Although the adjustment mechanism has the freedom of multi-axis rotation, the overall structure is compact, lightweight and small in size. After loading the antenna load, the volume of the entire machine can be minimized by storing the bracket and adjusting the pitch angle and polarization angle, which is easy to carry. The unfolding operation during satellite alignment is also extremely simple. You only need to unfold the bracket and then adjust it in three degrees of freedom. The adjustment mechanism of this design adopts an internal wiring method to prevent the external wiring from limiting the adjustment range of the three degrees of freedom, and to prevent unreliable factors introduced by line exposure, which can improve the reliability and safety of the adjustment mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the usage status of the three-axis linkage satellite antenna adjustment mechanism.

[0028] Figure 2 It is a cross-sectional view of the three-axis drive mechanism.

[0029] Markings in the figure: 1-1 is the antenna load; 1-2 is the three-axis drive mechanism; 1-3 is the bracket; 1 is the pitch end cover; 2 is the pitch joint module; 3 is the bearing; 4 is the pitch bearing seat; 5 is the bearing cover; 6 is the pitch through-line shaft; 7 is the outlet cover; 8 is the first limit pin; 9 is the polarization seat; 10 is the T-box; 11 is the second limit pin; 12 is the azimuth mounting seat; 13 is the polarization mounting seat; 14 is the polarization motor seat; 15 is the polarization wire sheath; 16 is the servo motor; 17 is the motor adapter plate; 18 is the harmonic reducer; 19 is the azimuth motor seat; 20 is the azimuth wire sheath; 21 is the azimuth fixing seat; 22 is the slip ring mounting seat; 23 is the conductive slip ring, 24 is the first arc-shaped slide groove; 25 is the first connecting plate; 26 is the second connecting plate; 27 is the polarization mounting plate, 28 is the cross arm, and 29 is the long arm. DETAILED DESCRIPTION

[0030] The utility model is described in detail below in conjunction with the accompanying drawings.

[0031] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0032] As Figure 1 shown, the three-axis linkage satellite antenna adjustment mechanism includes a bracket, which is designed as a tripod structure in this embodiment and has the characteristics of adjustable height, convenient storage, and small storage space. At the top of the tripod, a three-axis drive mechanism is connected, which has the adjustment functions of azimuth, elevation, and polarization degrees of freedom, and is formed by sequentially connecting an azimuth adjustment component, an elevation adjustment component, and a polarization adjustment component. When in use, the antenna load is connected to the polarization adjustment component.

[0033] It can be Figure 1 found that no cables are found outside the entire adjustment mechanism. This is because the three-axis drive mechanism, which is the core component, adopts an internal wiring method, that is, a connected wiring channel is provided inside the azimuth adjustment component, the elevation adjustment component, and the polarization adjustment component. The control line, signal line, and power line all run inside the three adjustment components, which can eliminate the limitation of the cable on the adjustment range of a certain / some degrees of freedom and avoid potential hazards caused by the cable being exposed outside, such as cable aging and damage caused by frequent folding, and damage caused by friction with external objects during storage.

[0034] As Figure 1 shown, in this embodiment, the adjustment of the azimuth angle is to rotate around the vertical axis, the adjustment of the elevation angle is to rotate around the horizontal axis, and the adjustment of the polarization angle is to rotate around an axis perpendicular to the elevation angle rotation axis when both the azimuth angle and the elevation angle are fixed. Specifically, there are:

[0035] The azimuth adjustment component is connected to the top of the bracket. The elevation adjustment component is connected to the end of the azimuth adjustment component, and the rotation axis of the elevation adjustment component is perpendicular to the rotation axis of the azimuth adjustment component. The polarization adjustment component is connected to the circumference of the rotation axis of the elevation adjustment component, and the rotation axis of the polarization adjustment component is perpendicular to the rotation axis of the elevation adjustment component.

[0036] The elevation adjustment component is located between the azimuth adjustment component and the polarization adjustment component, and it has a connection relationship with the other two adjustment components. Therefore, the structure of the elevation adjustment component will be introduced first here.

[0037] As Figure 2As shown, the main body of the pitch adjustment component is a T-shaped box, shaped like a T-shaped tube, which includes a horizontal cross arm and a long arm vertically connected to the middle of the cross arm. A pitch joint module is installed inside the T-shaped box, and this pitch joint module includes facilities such as a servo motor that can drive rotation. The pitch rotation output shaft of the pitch joint module is connected to a pitch end cover located at one end of the cross arm of the T-shaped box ( Figure 2 the left end in). The pitch joint module is fixed inside the T-shaped box, and driving the pitch rotation output shaft to rotate can drive the pitch end cover to rotate. A bearing is installed at the other end of the cross arm of the T-shaped box, and this bearing is installed inside the T-shaped box through a bearing mount fixed at the other end of the cross arm of the T-shaped box ( Figure 2 the right end in). The outer wall of the bearing is adaptively installed with the inner wall of the bearing mount. The bearing, the bearing mount and the output shaft of the pitch joint module are coaxially arranged. Usually, on the end face where the bearing is located, a bearing cover is also provided on the cross arm of the T-shaped box to cover the bearing and prevent dust and the like from entering. A pitch wire passing shaft is connected to the bearing, and this pitch wire passing shaft extends outside the cross arm of the T-shaped box and is connected to an outlet cover. The pitch wire passing shaft is tubular, and its outer wall is adaptively connected to the inner wall of the bearing, so it is also coaxially arranged with the bearing. The hollow part of the pitch wire passing shaft can pass wires, and the pitch wire passing shaft and the outlet cover serve as the wire routing channels of the pitch rotation component. In this way, the pitch wire passing shaft and the outlet cover can rotate around the pitch rotation output shaft of the pitch joint module. The polarization adjustment component is respectively connected to the pitch end cover and the outlet cover located at both ends of the cross arm of the T-shaped box in the circumferential direction of the rotation axis of the pitch adjustment component. The pitch joint module drives the pitch end cover to rotate, and the pitch end cover drives the polarization adjustment component to rotate circumferentially. Since the polarization adjustment component is also connected to the outlet cover, the outlet cover can perform driven rotation to ensure the stability of pitch angle adjustment.

[0038] As Figure 2 shown, the planned adjustment component includes a polarization base and a polarization mount. The polarization base is used to connect the pitch adjustment component, and the polarization mount is used to connect the antenna load.

[0039] Specifically, the polarization base is respectively connected to the pitch end cover and the outlet cover from both sides of the cross arm of the T-shaped box in the axial direction. In some embodiments, the polarization base includes a first connecting plate and a second connecting plate located at both ends of the cross arm of the T-shaped box. The two connecting plates are parallel to each other, and a polarization mounting plate is vertically connected between the first connecting plate and the second connecting plate. The cross arm of the T-shaped box is located in the space formed by the first connecting plate, the second connecting plate and the polarization mounting plate. The polarization mount is connected to the side of the polarization mounting plate facing away from the T-shaped box (preferably in the middle position).

[0040] A polarization motor module is installed inside the polarization mounting base, and the polarization rotating output shaft of the polarization motor module is connected to the polarization base. In some embodiments, the polarization motor module includes a servo motor, a motor adapter plate, a harmonic reducer, and a polarization rotating output shaft that are connected in sequence; the servo motor is installed on the polarization motor base, and the polarization motor base is connected to the polarization mounting base. In this way, the rotation of the servo motor drives the rotation of the polarization rotating output shaft. Since the polarization rotating output shaft is fixedly connected to the polarization base, in fact, the servo motor and the like rotate, driving the polarization mounting base to adjust the polarization angle. The servo motor is a brushless outer rotor motor with a built-in motor driver and a 16Bit encoder, which can achieve high-precision drive control of ±0.006°, thereby realizing high-precision polarization angle adjustment.

[0041] In this way, the polarization adjustment assembly includes two parts: the polarization base and the polarization mounting base. A polarization cable protection sleeve is arranged on the central axis of the polarization motor module as a wire routing channel inside the polarization motor module. Similarly, a wire routing channel is designed inside the polarization base, and the wire routing channel inside the polarization base is respectively communicated with the wire outlet cover and the polarization cable protection sleeve.

[0042] Since the polarization base is a bent plate shape and its internal space is narrow and inconvenient for wire routing, in some embodiments, the wire routing channel inside the polarization base uses a flexible printed circuit board for wire routing.

[0043] In principle, the polarization angle can be adjusted in the range of 360 degrees (i.e., ±180 degrees), and the pitch angle can be adjusted in the range of 0 degrees - 180 degrees. However, considering the application in the satellite pointing scenario where the satellite is on top of the adjustment mechanism, it is not necessary to design the adjustment range for the entire angle range. In some embodiments, the adjustment range of the polarization angle is designed within ±90 degrees (of course, canceling the limit can achieve adjustment within ±180 degrees), and the adjustment range of the pitch angle can also be designed within 0 degrees - 90 degrees (canceling the limit is within 0 degrees - 180 degrees). In specific implementation, the adjustment range of the polarization angle can be limited by the first limiting structure provided between the polarization mounting base and the polarization base. The first limiting structure includes a mutually cooperating first arc-shaped chute and a first limiting pin, where one is arranged on the polarization base and the other is arranged at the corresponding position on the polarization mounting base. For example, the first limiting pin is connected to the polarization base, and the first arc-shaped chute is arranged at the corresponding position on the polarization mounting base. The adjustment range of the pitch angle is limited by the second limiting structure provided between the polarization base and the cross arm of the T-shaped box. The second limiting structure includes a mutually cooperating second arc-shaped chute and a second limiting pin, where one is arranged on the end face of the cross arm of the T-shaped box and the other is arranged at the corresponding position on the polarization base. For example, the second limiting pin is arranged on the outer end face of the bearing cover, and the second arc-shaped chute is arranged at the corresponding position on the second connecting plate.

[0044] Compared with the pitch adjustment module and the azimuth adjustment module, which have the corresponding devices arranged on or inside their own structures, the structure of the azimuth adjustment component is more special.

[0045] The azimuth adjustment assembly includes an azimuth mounting seat and an azimuth motor module, the azimuth mounting seat is connected to the bracket; the azimuth motor module is installed in the long arm of the T-box (through the azimuth fixing seat in the T-box), and the azimuth rotation output shaft of the azimuth motor module is connected to the azimuth mounting seat. In this way, when the azimuth motor module drives its azimuth rotation output shaft to rotate, since the azimuth rotation output shaft is fixedly connected to the azimuth mounting seat, it is actually the main part of the azimuth motor module that rotates, thereby driving the T-box to rotate 360 ​​degrees around the vertical axis, thereby adjusting the azimuth angle.

[0046] In some embodiments, the structure of the azimuth adjustment module is the same as that of the polarization adjustment module, that is, both include a servo motor, a motor adapter, a harmonic reducer and a rotating output shaft (the polarization adjustment module is a polarization rotating output shaft, and the azimuth adjustment module is an azimuth rotating output shaft).

[0047] The adjustment mechanism proposed in the utility model can adjust the azimuth angle continuously for 360 degrees, which requires that the wire harness of the azimuth adjustment component part cannot be twisted. In some embodiments, a conductive slip ring is used in the azimuth adjustment component to realize the transmission of the wire harness.

[0048] The azimuth mounting seat is coaxially connected to the long arm of the T-box, and an azimuth wire sheath is provided on the central axis of the azimuth motor module as a wiring channel for the azimuth adjustment component. A conductive slip ring is coaxially connected inside the azimuth adjustment component, and the conductive slip ring is installed in the azimuth mounting seat through a slip ring mounting seat located in the azimuth mounting seat. The azimuth rotation output shaft of the azimuth adjustment module is connected to the part of the conductive slip ring fixed by the slip ring mounting seat, and the wiring harness of the conductive slip ring (free part) can be routed through the azimuth wire sheath.

[0049] The above design can achieve a compact and lightweight design of the adjustment mechanism in structure, as well as high-precision adjustment in each degree of freedom. The three-axis linkage can meet the pointing accuracy of ±0.02. The overall weight of the adjustment mechanism can be as low as 1.5 kg, but it can drive a 12 kg antenna load. The internal wiring design can improve the reliability and safety of the whole machine while maintaining the beauty of the whole machine.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-axis linkage satellite antenna adjustment mechanism, characterized in that, Comprising: A retractable bracket; A three-axis drive mechanism formed by sequentially connecting an azimuth adjustment component, a pitch adjustment component, and a polarization adjustment component. The azimuth adjustment component is connected to the bracket, and the polarization adjustment component is used to connect to an antenna load; a communication wire routing channel is provided inside the azimuth adjustment component, the pitch adjustment component, and the polarization adjustment component.

2. The three-axis linkage satellite antenna adjustment mechanism according to claim 1, wherein The pitch adjustment component is connected to the end of the azimuth adjustment component, and the rotation axis of the pitch adjustment component is perpendicular to the rotation axis of the azimuth adjustment component; The polarization adjustment component is connected to the circumference of the rotation axis of the pitch adjustment component, and the rotation axis of the polarization adjustment component is perpendicular to the rotation axis of the pitch adjustment component.

3. The three-axis linkage satellite antenna adjustment mechanism according to claim 2, wherein The pitch adjustment component includes a T-shaped box. A pitch joint module is installed inside the T-shaped box. The pitch rotation output shaft of the pitch joint module is connected to a pitch end cover located at one end of the cross arm of the T-shaped box. A bearing is installed at the other end of the cross arm of the T-shaped box. The bearing is coaxially arranged with the output shaft of the pitch joint module. A pitch wire passing shaft is connected to the bearing. The pitch wire passing shaft extends outside the cross arm of the T-shaped box and is connected to a wire outlet cover. The pitch wire passing shaft and the wire outlet cover serve as the wire routing channel of the pitch adjustment component; the polarization adjustment component is respectively connected to the pitch end cover and the wire outlet cover located at both ends of the cross arm of the T-shaped box from the circumference of the rotation axis of the pitch adjustment component.

4. The three-axis linkage satellite antenna adjustment mechanism according to claim 3, wherein The polarization adjustment component includes a polarization base and a polarization mounting base; The polarization base is respectively connected to the pitch end cover and the wire outlet cover from both sides of the axial direction of the cross arm of the T-shaped box; a polarization motor module is installed inside the polarization mounting base, and the polarization rotation output shaft of the polarization motor module is connected to the polarization base; A polarization wire protection sleeve is provided on the central axis of the polarization motor module, serving as the wire routing channel inside the polarization motor module; the wire routing channels inside the polarization base are respectively communicated with the wire outlet cover and the polarization wire protection sleeve.

5. The three-axis linkage satellite antenna adjustment mechanism according to claim 4, wherein A first limiting structure is provided between the polarization mounting base and the polarization base. The first limiting structure includes a mutually cooperating first arc-shaped chute and a first limiting pin.

6. The three-axis linkage satellite antenna adjustment mechanism according to claim 4, wherein A second limiting structure is provided between the polarization base and the cross arm of the T-shaped box. The second limiting structure includes a mutually cooperating second arc-shaped chute and a second limiting pin.

7. The three-axis linkage satellite antenna adjustment mechanism according to claim 4, wherein The wire routing channel inside the polarization base uses a flexible printed circuit board for wire routing.

8. The three-axis linkage satellite antenna adjustment mechanism according to claim 4, wherein The polarization motor module includes a servo motor, a motor adapter plate, a harmonic reducer, and the polarization rotary output shaft, which are connected in sequence; the servo motor is installed on the polarization motor base, and the polarization motor base is connected to the polarization mounting base.

9. The three-axis linkage satellite antenna adjusting mechanism according to any one of claims 3-8, characterized in that The azimuth adjusting assembly includes an azimuth mounting base and an azimuth motor module, and the azimuth mounting base is connected to the bracket; The azimuth motor module is installed in the long arm of the T-shaped box, and the azimuth rotary output shaft of the azimuth motor module is connected to the azimuth mounting base.

10. The three-axis linkage satellite antenna adjusting mechanism according to claim 9, characterized in that The azimuth mounting base is coaxially connected to the long arm of the T-shaped box; An azimuth wire protection sleeve is arranged on the central axis of the azimuth motor module as a wire routing channel for the azimuth adjusting assembly; A conductive slip ring is coaxially connected in the azimuth adjusting assembly, and the wire harness of the conductive slip ring is routed through the azimuth wire protection sleeve.

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