Feed mechanism of a winding rib-type deployable antenna

Abstract

The present invention relates to a feed mechanism of a winding rib-type deployable antenna, comprising: a base; a sleeve assembly: comprising a lower sleeve installed on the base, and an upper sleeve whose bottom extends into the lower sleeve and can move up and down along the axis direction of the lower sleeve, and a sleeve spring in a compressed state is also installed between the lower sleeve and the upper sleeve; a feed structure: comprising a feed, a feed line and a feed line fixing part, and the upper and lower ends of the feed line are respectively connected to the feed source and the feed line fixing part; a locking / unlocking member: comprising a locking rope and a hot knife, one end of the locking rope is fixedly connected to the upper sleeve, and the other end is fixed to the base, and the hot knife is also in close contact with the locking rope. Compared with the prior art, the present invention realizes the one-button synchronous deployment of the feed mechanism and the reflective surface, and the height of the feed can be adjusted as needed, and has the characteristics of high reliability of deployment and retraction, high accuracy of feed position and simple adjustment.

Description

Technical Field

[0001] The invention belongs to the technical field of aerospace structures and relates to a feed mechanism of a winding rib type deployable antenna. Background Art

[0002] Compared with traditional satellites, microsatellites have many advantages: short R&D cycle, low cost; small size, light weight, flexible launch; easy to achieve standardized design and modular assembly, etc. Communication satellites among application satellites are currently the artificial satellites that are most closely related to our lives. Among them, low-orbit communication satellites have the advantages of low cost, simple receiving equipment, and short broadband delay. Low-orbit microsatellite constellations that combine the advantages of microsatellites and low-orbit communication satellites have received widespread attention at home and abroad. For example, in order to create a large global Internet constellation, Space X has applied for the launch of a total of 42,000 microsatellites three times since 2016; China has also proposed communication constellation plans such as Hongyan and Hongyun.

[0003] The working performance of satellite antennas is mainly related to the size and processing accuracy of the antennas. The small size of microsatellites limits the electrical performance of the antennas they carry, which in turn limits the application scope of microsatellites. In addition to upgrading the design of communication systems, deployable satellite antennas with larger apertures and higher processing accuracy can also improve the working performance of microsatellite antennas.

[0004] At present, there are few deployable antennas used for in-orbit micro-satellites at home and abroad. For example, Chinese patent CN108767418A discloses a high storage ratio winding rib type deployable antenna structure, including: a mounting base; a central body: its interior is hollow and arranged on the mounting base; a retractable feed source: installed in the central body; a plurality of elastic winding ribs: which are installed around the outer side of the bottom of the central body; a metal mesh surface: stretched and laid on the elastic winding ribs, and cooperate with the unfolded elastic winding ribs to form a parabolic reflection surface; a locking assembly: including a bottom groove arranged on the mounting base around the central body, a locking hoop that constrains the unfolding of the elastic winding ribs and the bottom is placed in the bottom groove, an upper top plate arranged at the top of the retractable feed source and pressing the upper end of the locking hoop, and a locking rope; a release assembly: including a round rod hot knife in contact with the locking rope, and an external power supply. However, the feed system in this invention has the disadvantages of low rigidity after unfolding, difficulty in ensuring pointing accuracy, and inability to adjust the feed source height. Summary of the invention

[0005] The purpose of the present invention is to provide a feed mechanism for a wound rib-type deployable antenna, which can realize one-touch synchronous deployment of the feed mechanism and the reflective surface, and can adjust the feed height as needed. It has the characteristics of high deployment and retraction reliability and simple feed position adjustment.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A feed mechanism for a winding rib-type deployable antenna, comprising:

[0008] Base;

[0009] The sleeve assembly includes a lower sleeve mounted on a base, and an upper sleeve whose bottom extends into the lower sleeve and can move up and down along the axis of the lower sleeve. A sleeve spring in a compressed state is also installed between the lower sleeve and the upper sleeve.

[0010] Feed source structure: including a feed source, a feed line and a feed line fixing part, wherein the feed source is fixed on the top of the upper sleeve, the feed source fixing part is installed on the base, and the upper and lower ends of the feed line are respectively connected to the feed source and the feed line fixing part;

[0011] Locking / unlocking member: includes a locking rope and a hot knife, one end of the locking rope is fixedly connected to the upper sleeve, and the other end is fixed to the base, the hot knife is installed on the base, and the hot knife is also in close contact with the locking rope.

[0012] Furthermore, a protrusion protruding in the radial direction is provided on the outer surface of the upper sleeve, and a limiting bolt extending into the interior of the lower sleeve and used to press downward against the protrusion is provided in the upper middle region of the lower sleeve.

[0013] Furthermore, the lower sleeve is in two sections connected up and down, wherein the inner diameter of the upper section is smaller than the inner diameter of the lower section, and the inner wall surface of the upper section of the lower sleeve is tightly matched with the outer wall surface of the upper sleeve.

[0014] Furthermore, the upper middle region of the lower sleeve is also provided with a plurality of groups of through threaded holes distributed along the height direction, and the limit bolts are screwed into the through threaded holes at different heights to adjust the maximum height of the upper sleeve's upward movement.

[0015] Furthermore, within the range of movement of the upper sleeve up and down along the inner wall of the lower sleeve, the feeder is always in a non-tensioned state.

[0016] Furthermore, the base includes an upper base portion and a lower base portion that are connected to each other, the lower sleeve is installed on the upper base portion, and the feed fixing portion, the hot knife and the locking rope are all installed or connected to the lower base portion.

[0017] Furthermore, the upper part of the base and the lower part of the base are engaged with each other through a bayonet and then fixed with bolts.

[0018] Furthermore, a rope fixing end is provided on the base, and one end of the locking rope passes through the bottom end of the lower sleeve, passes sideways and is closely attached to the hot knife, and is then fixed to the rope fixing end.

[0019] Furthermore, the hot knife is installed on the base through a hot knife support.

[0020] Furthermore, a hoop retracting claw is installed on the top of the upper sleeve, and the edge of the hoop retracting claw extends downward to form a claw structure. When the expandable antenna is stored, the claw structure of the hoop retracting claw presses and clamps the top of the locking hoop to press the locking hoop into the bottom groove installed on the base, and retract the reflecting surface into the locking hoop.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] (1) The present invention simultaneously retracts and locks the feed mechanism and the reflective surface through a pre-tightened locking rope. The transmission path of the locking force is simple and clear, and the locking reliability is high. The unlocking method adopts a hot knife unlocking method. The feed mechanism and the reflective surface are driven to unfold simultaneously by the elastic energy stored in the sleeve spring and the elastic winding ribs when they are retracted, and the unfolding reliability is high.

[0023] (2) The upper sleeve of the present invention adopts a sunken design, which fully utilizes the internal space of the base and effectively reduces the folded height of the feed mechanism.

[0024] (3) The unfolding height of the present invention can be adjusted by the limit bolts on the side of the lower sleeve, so that the position of the feed source can be adjusted, which is convenient for testing and locking the optimal position of the feed source; the sleeves of the feed mechanism have a certain length of tight fit, so that the feed mechanism has a very high axial angle accuracy.

[0025] (4) The base of the present invention adopts a separate assembly form, so that the installation of the reflective surface and the feed mechanism are relatively independent to a certain extent, avoiding the situation where the installation and adjustment process of the feed mechanism affects the reflective surface.

[0026] (5) One end of the locking rope of the present invention is fixed to the top of the upper sleeve, which facilitates the replacement of the locking rope when the deployable antenna is folded and unfolded multiple times; the locking rope in the upper sleeve is distributed along the inner wall of the sleeve, occupying only a small space in the internal cavity of the feed mechanism, which is convenient for the arrangement of electrical components such as the feed line. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is an axonometric schematic diagram of the deployable antenna in the deployed state;

[0028] Figure 2 is a cross-sectional schematic diagram of the deployable antenna in the stowed state;

[0029] Figure 3 It is a cross-sectional schematic diagram of the feed mechanism in a folded state;

[0030] Figure 4 is a cross-sectional schematic diagram of the feed mechanism in an unfolded state;

[0031] Figure 5 This is an axonometric diagram of the base;

[0032] Figure 6 is an axonometric schematic diagram of the lower sleeve assembly;

[0033] Description of the markings in the figure:

[0034] 1 is a base, 1-1 is a lower part of a base, 1-2 is an upper part of a base, 2 is a lower sleeve assembly, 2-1 is a lower sleeve, 2-2 is a limit bolt, 3 is an upper sleeve, 4 is a sleeve spring, 5 is a feed structure, 5-1 is a feed, 5-2 is a feed line, 5-3 is a feed line fixing part, 6 is a locking / unlocking member, 6-1 is a locking rope, 6-2 is a rope fixing end, 6-3 is a hot knife, 6-4 is a hot knife support, 7 is a hoop gathering claw, 8 is a reflecting surface, 8-1 is an elastic winding rib, 8-2 is a metal mesh surface, 9 is a locking hoop, and 10 is a bottom groove. DETAILED DESCRIPTION

[0035] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the following implementation manners or examples, unless otherwise specified, functional components or structures are conventional components or conventional structures used in the art to achieve corresponding functions.

[0038] The present invention provides a feed source 5-1 mechanism of a winding rib type deployable antenna, the structure of which is shown in FIG. Figures 1 to 4 As shown, including:

[0039] Base 1;

[0040] The sleeve assembly includes a lower sleeve 2-1 mounted on a base 1, and an upper sleeve 3 whose bottom extends into the lower sleeve 2-1 and can move up and down along the axis of the lower sleeve 2-1. A sleeve spring 4 in a compressed state is also installed between the lower sleeve 2-1 and the upper sleeve 3.

[0041] Feed source 5-1 structure: including feed source 5-1, feed line 5-2 and feed line fixing part 5-3, the feed source 5-1 is fixed on the top of the upper sleeve 3, the feed source 5-1 fixing part is installed on the base 1, and the upper and lower ends of the feed line 5-2 are respectively connected to the feed source 5-1 and the feed line fixing part 5-3;

[0042] Locking / unlocking member 6: includes a locking rope 6-1 and a hot knife 6-3, one end of the locking rope 6-1 is fixedly connected to the upper sleeve 3, and the other end is fixed to the base 1, the hot knife 6-3 is installed on the base 1, and the hot knife 6-3 is also in close contact with the locking rope 6-1.

[0043] In some specific implementations, please refer to Figure 2 , Figure 6 As shown in the figures, the outer surface of the upper sleeve 3 is provided with a protrusion protruding in its radial direction, and the middle and upper area of ​​the lower sleeve 2-1 is provided with a limiting bolt 2-2 extending into the interior thereof and used to press downward against the protrusion.

[0044] For more specific implementations, please refer to Figures 2 to 4 As shown in the figure, the lower sleeve 2-1 is in two sections connected up and down, wherein the inner diameter of the upper section is smaller than the inner diameter of the lower section, and the inner wall surface of the upper section of the lower sleeve 2-1 is tightly matched with the outer wall surface of the upper sleeve 3, so as to ensure the axial angle accuracy of the upper sleeve 3 when it moves up and down. Generally speaking, the longer the length of the upper section, the higher the axial angle accuracy. At the same time, the outer diameter of the protrusion on the outside of the upper sleeve 3 is slightly smaller than the inner diameter of the lower section of the lower sleeve 2-1, but larger than the inner diameter of the upper section, so as to prevent the upper sleeve 3 from slipping out of the lower sleeve 2-1 when it moves up and unfolds. At the same time, there is a certain gap between the inner wall of the lower section of the lower sleeve 2-1 and the outer surface of the upper sleeve 3 to place the sleeve spring 4.

[0045] In a more specific embodiment, the middle and upper region of the lower sleeve 2-1 is also provided with a plurality of groups of through threaded holes distributed in the height direction, and the limiting bolts 2-2 (the lower sleeve 2-1 and the limiting bolts 2-2 cooperate to form the lower sleeve assembly 2) are screwed into the through threaded holes at different heights to adjust the maximum height of the upper sleeve 3 moving upward. Specifically, the limiting bolts 2-2 whose ends are close to the outer surface of the upper sleeve 3 when tightened are screwed into a group of through threaded holes at different heights, which can limit the height of the outer surface protrusion of the upper sleeve 3 moving upward, thereby adjusting the height of the upper sleeve 3 when it is fully extended. The distribution range of the through threaded holes in the axial direction of the lower sleeve 2-1 is the adjustment range of the height of the upper sleeve 3 when it is fully extended. Similarly, the spacing of the through threaded holes in the axial direction of the lower sleeve 2-1 is the minimum value of the height adjustment amount when the upper sleeve 3 is fully extended. The impact resistance reliability of the corresponding limiting bolts 2-2 can be improved by adjusting the number and diameter of bolts of the same height.

[0046] In addition, the minimum height of the sleeve spring 4 after compression is less than the distance between the lower surface of the outer surface protrusion of the upper sleeve 3 and the lower end of the upper sleeve 3, so as to ensure that the upper sleeve 3 can be completely retracted into the lower sleeve 2-1. The sleeve spring 4 is compressed when the antenna is stored, and the spring force causes the upper sleeve 3 to slide and unfold and maintain its unfolded state after unlocking. More preferably, the sleeve spring 4 can be made of stainless steel material with good mechanical properties, and its structural parameters such as the middle diameter, wire diameter, number of turns, pitch, etc. are determined by structural mechanics calculations and the design dimensions of the upper sleeve 3 and the lower sleeve 2-1.

[0047] In some specific embodiments, within the range of movement of the upper sleeve 3 up and down along the inner wall of the lower sleeve 2-1, the feeder line 5-2 is always in a non-tensioned state, and when the antenna is stored, the feeder line 5-2 is spirally curled in the upper sleeve 3, and the feeder line 5-2 is stretched when the antenna is deployed. In addition, when the feed source 5-1 mechanism is folded, the lower end of the upper sleeve 3 sinks to a position close to the upper surface of the lower portion 1-1 of the base.

[0048] In some specific implementations, please refer to Figure 5 As shown in the figure, the base 1 includes a base upper part 1-2 and a base lower part 1-1 connected to each other, the lower sleeve 2-1 is installed on the base upper part 1-2, and the feeder fixing part 5-3, the hot knife 6-3 and the locking rope 6-1 are all installed or connected to the base lower part 1-1. The present invention adopts the assembly form of the base 1 in the upper and lower parts, and the base lower part 1-1 is mainly used to install the locking / unlocking member 6, and the base upper part 1-2 is mainly used to install the reflective surface 8 of the deployable antenna, so that the installation of the deployable antenna reflective surface 8 and the feed source 5-1 mechanism is relatively independent.

[0049] In a more specific embodiment, the base upper part 1-2 and the base lower part 1-1 are engaged with each other through a bayonet and then fixed with bolts. The bayonet engagement can effectively reduce the shear force of the connecting bolts of the base upper part 1-2 and the base lower part 1-1.

[0050] In some specific implementations, please refer to Figure 2 As shown in the figure, the base 1 is also provided with a rope fixing end 6-2, one end of the locking rope 6-1 passes through the bottom end of the lower sleeve 2-1, passes through the side and is close to the hot knife 6-3, and is fixed at the rope fixing end 6-2. During operation, the locking rope 6-1 can be melted by heating the hot knife 6-3, thereby unlocking the feed source 5-1 mechanism.

[0051] In some specific implementations, please refer to Figure 2 As shown in the figure, the hot knife 6-3 is installed on the base 1 through the hot knife support 6-4. In addition, the hot knife 6-3 generally adopts a round rod hot knife.

[0052] In some specific implementations, please refer to Figure 2 As shown in FIG. 1 , a hoop retracting claw 7 is also installed on the top of the upper sleeve 3. The edge of the hoop retracting claw 7 extends downward to form a claw structure. When the deployable antenna is stored, the claw structure of the hoop retracting claw 7 presses and clamps the top of the locking hoop 9 to press the locking hoop 9 into the bottom groove 10 installed on the base 1, and retracts the reflective surface 8 into the locking hoop 9. Please refer to FIG. Figure 1 As shown, the reflecting surface 8 is composed of elastic winding ribs 8-1 and a metal mesh surface 8-2.

[0053] The above embodiments may be implemented individually or in any combination of two or more.

[0054] The above implementation is described in more detail below in conjunction with specific examples.

[0055] Embodiment 1:

[0056] This embodiment provides a feed source 5-1 mechanism for a winding rib-type deployable antenna, and its structure is shown in FIG. Figures 1 to 4 As shown, including:

[0057] Base 1;

[0058] The sleeve assembly includes a lower sleeve 2-1 mounted on a base 1, and an upper sleeve 3 whose bottom extends into the lower sleeve 2-1 and can move up and down along the axis of the lower sleeve 2-1. A sleeve spring 4 in a compressed state is also installed between the lower sleeve 2-1 and the upper sleeve 3.

[0059] Feed source 5-1 structure: including feed source 5-1, feed line 5-2 and feed line fixing part 5-3, the feed source 5-1 is fixed on the top of the upper sleeve 3, the feed source 5-1 fixing part is installed on the base 1, and the upper and lower ends of the feed line 5-2 are respectively connected to the feed source 5-1 and the feed line fixing part 5-3;

[0060] Locking / unlocking member 6: includes a locking rope 6-1 and a hot knife 6-3, one end of the locking rope 6-1 is fixedly connected to the upper sleeve 3, and the other end is fixed to the base 1, the hot knife 6-3 is installed on the base 1, and the hot knife 6-3 is also in close contact with the locking rope 6-1.

[0061] Please see again Figure 2 , Figure 6 As shown in the figures, the outer surface of the upper sleeve 3 is provided with a protrusion protruding in its radial direction, and the middle and upper area of ​​the lower sleeve 2-1 is provided with a limiting bolt 2-2 extending into the interior thereof and used to press downward against the protrusion.

[0062] Please see again Figures 2 to 4 As shown in the figure, the lower sleeve 2-1 is in two sections connected up and down, wherein the inner diameter of the upper section is smaller than the inner diameter of the lower section, and the inner wall surface of the upper section of the lower sleeve 2-1 is closely matched with the outer wall surface of the upper sleeve 3, so that the axial angle accuracy of the upper sleeve 3 when moving up and down can be ensured. Generally speaking, the longer the length of the upper section, the higher the axial angle accuracy. At the same time, the outer diameter of the protrusion on the outer side of the upper sleeve 3 is slightly smaller than the inner diameter of the lower section of the lower sleeve 2-1, but larger than the inner diameter of the upper section, so that the upper sleeve 3 can be prevented from slipping out of the lower sleeve 2-1 when moving up and unfolding. At the same time, a certain gap is left between the inner wall of the lower section of the lower sleeve 2-1 and the outer surface of the upper sleeve 3 to place the sleeve spring 4. The middle and upper area of ​​the lower sleeve 2-1 is also provided with a plurality of groups of through threaded holes distributed in the height direction, and the limit bolts 2-2 are screwed into the through threaded holes at different heights to adjust the maximum height of the upper sleeve 3 moving upward. Specifically, the limit bolts 2-2 whose ends are close to the outer surface of the upper sleeve 3 when tightened can be screwed into a group of through threaded holes at different heights to limit the height of the outer surface protrusion of the upper sleeve 3 moving upward, thereby adjusting the height of the upper sleeve 3 when it is fully extended. The distribution range of the through threaded holes in the axial direction of the lower sleeve 2-1 is the adjustment range of the height when the upper sleeve 3 is fully extended. Similarly, the spacing of the through threaded holes in the axial direction of the lower sleeve 2-1 is the minimum value of the height adjustment when the upper sleeve 3 is fully extended. The impact resistance reliability of the corresponding limit bolts 2-2 can be improved by adjusting the number and diameter of bolts of the same height.

[0063] In addition, the minimum height of the sleeve spring 4 after compression is less than the distance between the lower surface of the outer surface protrusion of the upper sleeve 3 and the lower end of the upper sleeve 3, so as to ensure that the upper sleeve 3 can be completely retracted into the lower sleeve 2-1. The sleeve spring 4 is compressed when the antenna is stored, and the spring force after unlocking causes the upper sleeve 3 to slide and unfold and maintain its unfolded state. More preferably, the sleeve spring 4 can be made of stainless steel material with good mechanical properties, and its structural parameters such as the middle diameter, wire diameter, number of turns, pitch, etc. are determined by structural mechanics calculations and the design dimensions of the upper sleeve 3 and the lower sleeve 2-1. Within the travel range of the upper sleeve 3 moving up and down along the inner wall of the lower sleeve 2-1, the feed line 5-2 is always in a non-tensioned state. In addition, when the feed source 5-1 mechanism is folded, the lower end of the upper sleeve 3 sinks to the upper surface close to the lower part 1-1 of the base.

[0064] Please see again Figure 5 As shown in the figure, the base 1 includes an upper base part 1-2 and a lower base part 1-1 which are connected to each other, the lower sleeve 2-1 is installed on the upper base part 1-2, and the feeder fixing part 5-3, the hot knife 6-3 and the locking rope 6-1 are all installed or connected to the lower base part 1-1. In this embodiment, the base 1 is assembled in the form of an upper and lower part, and the lower base part 1-1 is mainly used to install the locking / unlocking part 6, and the upper base part 1-2 is mainly used to install the reflective surface 8 of the deployable antenna, so that the installation of the deployable antenna reflective surface 8 and the feed source 5-1 mechanism is relatively independent. The upper base part 1-2 and the lower base part 1-1 are engaged with each other through a bayonet, and then fixed with bolts. The bayonet engagement can effectively reduce the shear force of the connecting bolts of the upper base part 1-2 and the lower base part 1-1.

[0065] Please see again Figure 2 As shown in the figure, the base 1 is also provided with a rope fixing end 6-2, one end of the locking rope 6-1 passes through the bottom end of the lower sleeve 2-1, passes through the side and is close to the hot knife 6-3, and is fixed at the rope fixing end 6-2. During operation, the locking rope 6-1 can be melted by heating the hot knife 6-3, thereby unlocking the feed source 5-1 mechanism.

[0066] Please see again Figure 2 As shown in FIG. 1 , the hot knife 6-3 is installed on the base 1 through the hot knife support 6-4.

[0067] Please see again Figure 2 As shown in the figures, a hoop retracting claw 7 is also installed on the top of the upper sleeve 3, and the edge of the hoop retracting claw 7 extends downward to form a claw structure. When the deployable antenna is stored, the claw structure of the hoop retracting claw 7 presses and clamps the top of the locking hoop 9 to press the locking hoop 9 into the bottom groove 10 installed on the base 1, and retract the reflecting surface 8 into the locking hoop 9.

[0068] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A feed mechanism for a wound rib-type deployable antenna, characterized in that: include: Base; The sleeve assembly includes a lower sleeve mounted on a base, and an upper sleeve whose bottom extends into the lower sleeve and can move up and down along the axis of the lower sleeve. A sleeve spring in a compressed state is also installed between the lower sleeve and the upper sleeve. Feed source structure: including a feed source, a feed line and a feed line fixing part, wherein the feed source is fixed on the top of the upper sleeve, the feed source fixing part is installed on the base, and the upper and lower ends of the feed line are respectively connected to the feed source and the feed line fixing part; Locking / unlocking member: comprising a locking rope and a hot knife, one end of the locking rope is fixedly connected to the upper sleeve, and the other end is fixed to the base, the hot knife is installed on the base, and the hot knife is also in close contact with the locking rope; The outer surface of the upper sleeve is also provided with a protrusion protruding in the radial direction thereof, and the middle and upper region of the lower sleeve is also provided with a limiting bolt extending into the interior thereof and used to press downward against the protrusion; The lower sleeve is in two sections connected to each other, wherein the inner diameter of the upper section is smaller than the inner diameter of the lower section, and the inner wall surface of the upper section of the lower sleeve is tightly matched with the outer wall surface of the upper sleeve; The middle and upper region of the lower sleeve is also provided with a plurality of groups of through threaded holes distributed along the height direction, and the limit bolts are screwed into the through threaded holes at different heights to adjust the maximum height of the upper sleeve moving upward; In the range of travel of the upper sleeve moving up and down along the inner wall of the lower sleeve, the feeder is always in a non-tensioned state; A hoop retracting claw is also installed on the top of the upper sleeve, and the feed mechanism also includes a locking hoop for retracting the reflective surface. The edge of the hoop retracting claw extends downward to form a claw structure. When the deployable antenna is stored, the claw structure of the hoop retracting claw presses and clamps the top of the locking hoop to press the locking hoop into the bottom groove installed on the base, and retract the reflective surface into the locking hoop; The locking rope in the upper sleeve is distributed along the inner wall of the sleeve; The base comprises an upper base portion and a lower base portion which are connected to each other, the lower sleeve is installed on the upper base portion, and the feed source fixing portion, the hot knife and the locking rope are all installed or connected to the lower base portion; The upper part of the base and the lower part of the base are engaged with each other through a bayonet and then fixed with bolts; The base is also provided with a rope fixing end, one end of the locking rope passes through the bottom end of the lower sleeve, passes sideways and is closely attached to the hot knife, and is then fixed at the rope fixing end.

2. The feed mechanism of the wound rib-type deployable antenna according to claim 1, characterized in that: The hot knife is installed on the base through a hot knife support.

Images