Pointing mechanism of offset feed antenna and using method
阅读说明：本技术 偏馈天线的指向机构及使用方法 (Pointing mechanism of offset feed antenna and using method ) 是由 董毅 王学强 王浩淼 罗小乐 陈伟 黄盛� 于 2020-06-22 设计创作，主要内容包括：本发明提供了一种偏馈天线的指向机构及使用方法,包括主体机座、天线机座、驱动组件、馈源机座以及锁定组件；所述驱动组件设置在所述主体机座一侧面上,用于驱动所述天线机座转动；所述天线机座设置在所述主体机座的内侧,所述天线机座一端通过第一法兰A与所述主体机座转动连接,另一端连接所述驱动组件的输出轴；所述馈源机座设置在所述天线机座的内侧,所述馈源机座的一端通过第一法兰B与所述天线机座转动连接,另一端通过第二法兰连接所述驱动组件的输出轴；所述馈源机座上设置有锁定组件,所述锁定组件,用于所述馈源机座与所述天线机座之间的锁定。本发明整体结构紧凑,可靠性高。(The invention provides a pointing mechanism of an offset feed antenna and a using method thereof, comprising a main body base, an antenna base, a driving component, a feed source base and a locking component; the driving assembly is arranged on one side surface of the main body base and used for driving the antenna base to rotate; the antenna base is arranged on the inner side of the main body base, one end of the antenna base is rotatably connected with the main body base through a first flange A, and the other end of the antenna base is connected with an output shaft of the driving assembly; the feed source base is arranged on the inner side of the antenna base, one end of the feed source base is rotatably connected with the antenna base through a first flange B, and the other end of the feed source base is connected with an output shaft of the driving assembly through a second flange; and the feed source base is provided with a locking assembly, and the locking assembly is used for locking the feed source base and the antenna base. The invention has compact integral structure and high reliability.)
1. A pointing mechanism of an offset feed antenna is characterized by comprising a main body base, an antenna base, a driving assembly, a feed source base and a locking assembly;
the driving assembly is arranged on one side surface of the main body base and used for driving the antenna base to rotate;
the antenna base is arranged on the inner side of the main body base, one end of the antenna base is rotatably connected with the main body base through a first flange A, and the other end of the antenna base is connected with an output shaft of the driving assembly;
the feed source base is arranged on the inner side of the antenna base, one end of the feed source base is rotatably connected with the antenna base through a first flange B, and the other end of the feed source base is connected with an output shaft of the driving assembly through a second flange;
and the feed source base is provided with a locking assembly, and the locking assembly is used for locking the feed source base and the antenna base.
2. The pointing mechanism of the offset antenna as claimed in claim 1, wherein the locking assembly comprises a locking bracket, a locking pin and a compression spring;
the locking bracket is arranged on the inner side surface of the antenna base and is provided with a locking pin sliding groove;
the locking pin is arranged in the locking pin sliding groove, and a limiting step is arranged on the locking pin; the pressure spring is sleeved on the locking pin and limited between the locking support and the limiting step.
3. The pointing mechanism for a bias-fed antenna according to claim 2, wherein said locking assembly further comprises a micro-switch and a micro-switch pad;
the microswitch pressing sheet is arranged at the outer end part of the locking pin, and a microswitch is arranged at the outer end part of the locking bracket;
when the pressure spring drives the locking pin to enter the limiting hole of the antenna base, the microswitch pressing sheet presses and contacts the microswitch when the feed source base is locked with the antenna base.
4. The pointing mechanism for a bias-fed antenna according to claim 1, further comprising a first bearing;
the first bearing is arranged on the main body base; the first flange A is arranged on an inner ring of the first bearing, so that the antenna base is rotatably connected with the main body base.
5. The pointing mechanism of the offset antenna as claimed in claim 1, further comprising a second bearing and a third bearing;
the second bearing and the third bearing are respectively arranged at the two end parts of the inner side surface of the antenna base;
the first flange B is arranged on the inner ring of the second bearing, and the second flange is arranged on the inner ring of the third bearing, so that the antenna base is rotationally connected with the feed source base.
6. The pointing mechanism of the offset antenna as claimed in claim 2, wherein the locking pin surface, the wall surface of the locking pin sliding groove and the locking pin hole surface are opposite sliding surfaces coated with a MoS2 solid lubricant film.
7. The pointing mechanism of the offset antenna of claim 1, wherein the antenna base and the feed base are capable of relative rotation of 77 °;
the antenna base and the feed source base can integrally rotate for-77 degrees to +30 degrees relative to the main body base.
8. The pointing mechanism of the offset antenna of claim 1, wherein the antenna base and the feed base are U-shaped;
and the antenna base and the feed source base are coaxially arranged.
9. The pointing mechanism of the offset antenna as claimed in claim 3, wherein the number of the limiting holes of the antenna base is plural, and the plural limiting holes are circumferentially distributed.
10. A use method of a pointing mechanism of a bias feed antenna is characterized by comprising the following steps:
step S1: unlocking the antenna base;
step S2: the driving component drives the antenna base to rotate;
step S3: after the antenna base rotates to a preset angle, the pressure spring is unlocked, the locking pin slides in the locking pin sliding groove to a limiting hole of the antenna base under the action of the pressure spring, the microswitch is triggered, an in-place signal is provided, and the driving assembly stops rotating;
step S4: and then the feed source base is unlocked, and the antenna comprising the pointing mechanism can realize the rotating pointing function under the action of the driving assembly.
Technical Field
The invention relates to the technical field of aerospace electromechanical, in particular to a pointing mechanism of an offset feed antenna and a using method thereof.
Background
With the mature development of modern aerospace technology, space exploration activities become more frequent and tasks become more complex, especially represented by space stations, lunar planning and mars exploration projects. The antenna products are mainly used for ensuring the transmission of data between satellites and earth satellites.
The offset antenna has no influence of feed shadow because the mounting positions of the feed and the high-frequency head are not on a straight line which is vertical to the central tangent plane of the antenna and passes through the center of the antenna, and has stronger adaptability because the gain of the offset antenna is larger than that of the positive feed antenna on the premise of the same antenna area, processing precision and receiving frequency.
Due to principle difference, the offset feed antenna needs to meet the severe vibration environment in the transmitting stage, the feed rod needs to be rotated and locked with the antenna at a fixed angle after the in-orbit antenna is unfolded, high positioning accuracy needs to be met, and the ground and satellite transmission is met along with the fact that the feed rod and the antenna body need to rotate together.
However, no pointing mechanism exists in the prior art, and the functional requirements can be met.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a pointing mechanism of an offset antenna and a using method thereof.
The pointing mechanism of the offset feed antenna comprises a main body base, an antenna base, a driving assembly, a feed source base and a locking assembly, wherein the main body base is provided with a first guide hole;
the driving assembly is arranged on one side surface of the main body base and used for driving the antenna base to rotate;
the antenna base is arranged on the inner side of the main body base, one end of the antenna base is rotatably connected with the main body base through a first flange A, and the other end of the antenna base is connected with an output shaft of the driving assembly;
the feed source base is arranged on the inner side of the antenna base, one end of the feed source base is rotatably connected with the antenna base through a first flange B, and the other end of the feed source base is connected with an output shaft of the driving assembly through a second flange;
and the feed source base is provided with a locking assembly, and the locking assembly is used for locking the feed source base and the antenna base.
Preferably, the locking assembly comprises a locking bracket, a locking pin and a compression spring;
the locking bracket is arranged on the inner side surface of the antenna base and is provided with a locking pin sliding groove;
the locking pin is arranged in the locking pin sliding groove, and a limiting step is arranged on the locking pin; the pressure spring is sleeved on the locking pin and limited between the locking support and the limiting step.
Preferably, the locking assembly further comprises a microswitch and a microswitch blade;
the microswitch pressing sheet is arranged at the outer end part of the locking pin, and a microswitch is arranged at the outer end part of the locking bracket;
when the pressure spring drives the locking pin to enter the limiting hole of the antenna base, the microswitch pressing sheet presses and contacts the microswitch when the feed source base is locked with the antenna base.
Preferably, a first bearing is further included;
the first bearing is arranged on the main body base; the first flange A is arranged on an inner ring of the first bearing, so that the antenna base is rotatably connected with the main body base.
Preferably, the device further comprises a second bearing and a third bearing;
the second bearing and the third bearing are respectively arranged at the two end parts of the inner side surface of the antenna base;
the first flange B is arranged on the inner ring of the second bearing, and the second flange is arranged on the inner ring of the third bearing, so that the antenna base is rotationally connected with the feed source base.
Preferably, the surface of the locking pin, the wall surface of the locking pin sliding groove and the surface of the locking pin hole are opposite sliding surfaces which are coated with MoS2 solid lubricating films.
Preferably, the antenna base and the feed base can relatively rotate for 77 degrees;
the antenna base and the feed source base can integrally rotate for-77 degrees to +30 degrees relative to the main body base.
Preferably, the antenna base and the feed source base are U-shaped;
and the antenna base and the feed source base are coaxially arranged.
Preferably, the number of the limiting holes of the antenna base is multiple, and the multiple limiting holes are distributed circumferentially.
The use method of the pointing mechanism of the offset antenna provided by the invention comprises the following steps:
step S1: unlocking the antenna base;
step S2: the driving component drives the antenna base to rotate;
step S3: after the antenna base rotates to a preset angle, the pressure spring is unlocked, the locking pin slides in the locking pin sliding groove to a limiting hole of the antenna base under the action of the pressure spring, the microswitch is triggered, an in-place signal is provided, and the driving assembly stops rotating;
step S4: and then the feed source base is unlocked, and the antenna comprising the pointing mechanism can realize the rotating pointing function under the action of the driving assembly.
Compared with the prior art, the invention has the following beneficial effects:
according to the antenna base and the feed source base, the antenna base and the feed source base are driven to rotate through the driving assembly, so that the angle adjustment among the main body base, the antenna base and the feed source base is realized, the antenna base and the feed source base can relatively rotate for 77 degrees, the antenna base and the feed source base can integrally rotate for-77 degrees to +30 degrees relative to the base, the whole structure is compact, and the reliability is high;
according to the invention, through distributed unlocking and rotation of the driving assembly, the locking pin between the antenna base and the feed source base slides in the corresponding groove under the action of the pressure spring, and after the locking pin rotates in place, the locking pin is in the groove, so that the locking of the antenna base and the feed source base is ensured, and the requirement of locking the repetition angle of 0.02 degree can be met.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic diagram illustrating an initial state of a pointing mechanism of an offset antenna according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a locking state of a pointing mechanism of the offset antenna according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a driving portion of a pointing mechanism of an offset antenna according to an embodiment of the present invention;
fig. 4 is a partial cross-sectional view of a locking assembly of a pointing mechanism of a bias-fed antenna according to an embodiment of the present invention.
In the figure:
the antenna base comprises a main body base 1, an
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Fig. 1 is a schematic view of an initial state of a pointing mechanism of a bias antenna in an embodiment of the present invention, and fig. 2 is a schematic view of a locking state of the pointing mechanism of the bias antenna in the embodiment of the present invention, as shown in fig. 1 and fig. 2, the pointing mechanism of the bias antenna provided in the present invention includes a main body base 1, an
the
the
the
the
Fig. 3 is a schematic sectional view of a driving portion of a pointing mechanism of a bias-fed antenna according to an embodiment of the present invention, where the pointing mechanism of the bias-fed antenna further includes a first bearing, a second bearing, and a third bearing;
the first bearing is arranged on the main body base; the first flange a is disposed on an inner ring of the first bearing so that the
The second bearing and the third bearing are respectively arranged at the two end parts of the inner side surface of the
the first flange B is arranged on the inner ring of the second bearing, and the second flange 8 is arranged on the inner ring of the third bearing, so that the
Fig. 4 is a partial cross-sectional schematic view of a locking state locking assembly of a pointing mechanism of a bias feed antenna in an embodiment of the present invention, as shown in fig. 4, the locking assembly 4 includes a locking bracket 401, a locking pin 402, and a compression spring 405;
the locking bracket 401 is arranged on the inner side surface of the
the locking pin 402 is arranged in the locking pin sliding groove, and a limit step is arranged on the locking pin 402; the compression spring 405 is sleeved on the locking pin 402 and limited between the locking bracket 401 and the limiting step;
the microswitch pressing sheet 404 is arranged at the outer end part of the locking pin 402, and a microswitch 403 is arranged at the outer end part of the locking bracket 401;
a locking pin hole is arranged on the
the locking assembly 4 further comprises a microswitch 403 and a microswitch presser 404;
the microswitch pressing sheet 404 is arranged at the outer end part of the locking pin 402, and a microswitch 403 is arranged at the outer end part of the locking bracket 401;
when the compression spring 405 drives the locking pin 402 to enter the limiting hole, so that the
In the embodiment of the present invention, the number of the limiting holes of the antenna base is plural, and the plural limiting holes are circumferentially distributed, specifically, circumferentially distributed centering on the first flange B and the second flange 8.
In the embodiment of the invention, the surface of the locking pin, the wall surface of the locking pin sliding groove and the surface of the locking pin hole are opposite sliding surfaces, and are coated with MoS2 solid lubricating films.
The
the
The
and the
The use method of the pointing mechanism of the offset antenna provided by the embodiment of the invention comprises the following steps:
step S1: unlocking the
step S2: the driving
step S3: after the
step S4: then the
The preset angle can be any angle of 30 degrees and 45 degrees.
In the embodiment of the present invention, the
In the embodiment of the invention, the antenna base and the feed source base are driven to rotate by the driving component, so that the angle adjustment among the main body base, the antenna base and the feed source base is realized, the antenna base and the feed source base can relatively rotate for 77 degrees, the antenna base and the feed source base can integrally rotate for-77 degrees to +30 degrees relative to the base, and the antenna base and the feed source base have compact integral structure and high reliability; in the embodiment of the invention, through distributed unlocking and rotation of the driving assembly, the locking pin between the antenna base and the feed source base slides in the corresponding groove under the action of the pressure spring, and after the locking pin rotates in place, the locking pin is in the groove, so that the locking of the antenna base and the feed source base is ensured, and the requirement of locking the repetition angle of 0.02 degree can be met.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
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