High-precision control method suitable for space connecting rod type antenna array surface unfolding and folding mechanism

Abstract

The invention provides a high-precision control method suitable for a space connecting rod type antenna array surface unfolding and folding mechanism, and relates to the technical field of radar antenna array surface erection. According to the high-precision control method, deformation caused by gravity is counteracted by conducting one-way internal stress pre-deformation design on the unfolding and folding mechanism, deformation caused by the gravity in the unfolding and folding process of the unfolding and folding mechanism is reduced, shear fork arms are made to have the deformation amount symmetrical along the center line, the overall flatness of the installation position of a column framework reaches the optimal state, and the overall flatness of the installation position of the column framework reaches the optimal state. The high-precision repeatable configuration of the unfolding and folding mechanism is realized; a synchronous connecting rod mechanism is arranged between the upper shear fork arm and the lower shear fork arm, a plurality of driving oil cylinders which operate synchronously are arranged on the shear fork arms, and hinge points of the shear fork arms are matched with two sets of conical roller bearings which are installed back to back in a clearance eliminating mode through hinge shafts, so that stable hinge joint of an outer side connecting rod and an inner side connecting rod is achieved; and the control precision of the unfolding and folding mechanism is further guaranteed through the method that the hinged shaft head ends of the shear fork arms are connected with the column frameworks through the column framework hinge seats.

Description

Technical Field

[0001] The invention relates to the technical field of radar antenna array installation, and in particular to a high-precision control method suitable for a space link type antenna array deployment and retraction mechanism. Background Art

[0002] As the caliber of radar antenna arrays increases, the radar's own survivability and combat concealment are urgent needs in modern warfare. The space-linked antenna array deployment and retraction system has extremely strong maneuverability and can realize the maneuverable deployment and withdrawal of highly integrated large-aperture antenna arrays. It is an excellent choice for the deployment and withdrawal of low-frequency large-aperture radar arrays.

[0003] However, the spatial linkage mechanism has many hinge points and is extremely flexible. How to control the deformation of the array and ensure the accuracy of the antenna array while ensuring the installation and withdrawal of the large-aperture antenna array is a major problem faced in engineering. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a high-precision control method applicable to a space-linked antenna array deployment and retraction mechanism, which solves the problem of poor control accuracy of the space-linked antenna array deployment and retraction mechanism.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A high-precision control method applicable to a space linkage antenna array deployment and retraction mechanism, the high-precision control method comprising:

[0007] The length L of the unit arm of the nth section of the lower scissor arm n It is lengthened relative to M, so that internal stress is generated when the extension and retraction mechanism is deployed, driving the scissor arms to deflect upward at an angle of α, satisfying:

[0008] L n =M+a n

[0009] Wherein, M is the unit arm expansion length of the upper scissor arm;

[0010] a n >0, its value is

[0011] nθ is the deflection angle of the nth unit arm of the upper scissor arm relative to the first unit arm.

[0012] Preferably, the stowage mechanism comprises: a support, a scissor arm and a column frame;

[0013] The support is provided with a scissor arm which is extended and retracted in the horizontal direction;

[0014] The scissor arms are provided with a plurality of column frames arranged in the expansion and contraction direction, and each column frame extends vertically;

[0015] The scissor arm comprises: an upper scissor arm and a lower scissor arm;

[0016] The upper part of the column frame is connected to the upper scissor arm, and the lower part is connected to the lower scissor arm.

[0017] Preferably, when the upper scissor arm is in the unfolded state, the vertical displacement H of the end of the nth unit arm is:

[0018]

[0019] Among them, θ is the deflection angle of the adjacent unit arms of the scissor arm at the corresponding hinge point.

[0020] Preferably, the high-precision control method further includes:

[0021] A synchronous connecting rod mechanism is arranged between the upper scissor fork arm and the lower scissor fork arm;

[0022] The synchronous link mechanism comprises: a fixed hinge point, a first link, a second link and a third link;

[0023] The fixed hinge point is arranged on the support, the midpoint of the first connecting rod is hinged to the fixed hinge point, and the two ends of the first connecting rod are hinged to the head ends of the second connecting rod and the third connecting rod respectively;

[0024] The end of the second connecting rod is hinged to the upper scissor arm, the end of the third connecting rod is hinged to the lower scissor arm, and the second connecting rod and the third connecting rod are of equal length.

[0025] Preferably, the upper connecting rod at the head end of the upper scissor arm is hinged to the support, the lower connecting rod at the head end of the upper scissor arm is hinged to the first slider, the first slider is slidably connected to the support, and the end of the second connecting rod is hinged to the first slider;

[0026] The lower connecting rod at the head end of the lower scissor arm is hinged to the support, the upper connecting rod at the head end of the lower scissor arm is hinged to the second slider, the second slider is slidably connected to the support, and the end of the third connecting rod is hinged to the second slider;

[0027] A limit stopper is provided on the support to limit the movement limit positions of the first slider and the second slider;

[0028] A latch is provided between the support and the first slider and the second slider, and is used to fix the first slider, the second slider and the support after the scissor arms are unfolded or retracted into place.

[0029] Preferably, the high-precision control method further includes:

[0030] A plurality of synchronously operating driving cylinders are arranged on the scissor arms, and the extension direction of all the driving cylinders is parallel to the extension and retraction direction of the scissor arms;

[0031] The driving oil cylinder is self-locking after being deployed into position, so that the rigid positioning of the scissor arms along the deployment direction can be achieved.

[0032] Preferably, the high-precision control method further includes:

[0033] At the hinge point of the scissor arm, a hinge shaft is used with two sets of tapered roller bearings installed back to back to eliminate backlash to stably hinge the outer connecting rod and the inner connecting rod;

[0034] The outer connecting rod is provided with an outer reaming hole, and the inner connecting rod is provided with an inner reaming hole;

[0035] The head end of the hinge shaft is connected with the outer reaming hole by interference fit, and the end end is connected with the inner reaming hole bearing through two sets of tapered roller bearings installed back to back, so as to realize the hinge connection between the outer connecting rod and the inner connecting rod;

[0036] A first stud is provided at the end of the hinge shaft, and two sets of tapered roller bearings are installed back to back in the inner reaming hole. The end of the hinge shaft is threadedly connected with two first round nuts after passing through the two sets of tapered roller bearings. The first round nuts are tightened with torque to eliminate the gap and press the two sets of tapered roller bearings; a first anti-loosening gasket is provided between the two first round nuts.

[0037] Preferably, a cover is installed at the inner end of the inner reaming hole to prevent sand, dust and foreign matter from entering.

[0038] Preferably, the inner connecting rod is provided with a grease injection port connected to the inner reaming hole, which is used for regularly injecting grease into the tapered roller bearing position.

[0039] Preferably, the high-precision control method further includes:

[0040] The hinge shaft head end of the scissor arm is connected to the column frame through a column frame hinge seat;

[0041] The column frame hinge seat comprises: a sliding bearing, a hinge seat, a retaining ring, a second anti-loosening washer and a second round nut;

[0042] The hinge seat is connected to the hinge shaft bearing through a sliding bearing, and the column frame is fixedly connected to the hinge seat;

[0043] One end of the sliding bearing is limited by the shoulder of the hinge shaft, and the other end is limited by the retaining ring;

[0044] The hinge shaft head end is provided with a second stud, which passes through a retaining ring and a second anti-loosening gasket in sequence and is threadedly connected with a second round nut.

[0045] The present invention provides a high-precision control method for a space-link antenna array deployment and retraction mechanism. Compared with the prior art, it has the following beneficial effects:

[0046] In the present invention, the high-precision control method offsets the deformation caused by gravity by designing a unidirectional internal stress pre-deformation of the deployment and retraction mechanism, reduces the deformation of the deployment and retraction mechanism caused by gravity during the deployment and retraction process, makes the scissor arms present a deformation amount that is symmetrical along the center line, and the overall flatness at the installation position of the column frame reaches an optimal state, thereby realizing a high-precision and repeatable configuration of the deployment and retraction mechanism; and further ensures the control accuracy of the deployment and retraction mechanism by arranging a synchronous connecting rod mechanism between the upper scissor arm and the lower scissor arm, arranging a plurality of synchronously running driving cylinders on the scissor arms, using a hinge shaft at the hinge point of the scissor arms in combination with two groups of back-to-back anti-backlash mounted tapered roller bearings to realize stable articulation of the outer connecting rod and the inner connecting rod, and connecting the column frame through a column frame articulated seat at the hinge shaft head end of the scissor arms. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 Schematic diagram of the structure of the unfolding and retracting mechanism in an embodiment of the present invention.

[0049] Figure 2 Schematic diagram of the deformation of the unfolding and retracting mechanism in the embodiment of the present invention. Figure 3 Schematic diagram of the synchronous connecting rod mechanism in the embodiment of the present invention. Figure 4 Schematic diagram of the articulated structure of the scissor arms in an embodiment of the present invention. Figure 5 for Figure 4 Enlarged view of point A in the middle. Figure 6 for Figure 4 Enlarged view of point B in the middle.

[0050] The reference numerals in the figure are set as: support 10, column frame 20, upper scissor arm 30, first slider 31, lower scissor arm 40, second slider 41, fixed hinge 50, first connecting rod 51, second connecting rod 52, third connecting rod 53, driving cylinder 60, hinge shaft 70, tapered roller bearing 71, outer connecting rod 72, inner connecting rod 73, first round nut 74, first anti-loosening gasket 75, cover 76, grease injection port 77, column frame articulated seat 80, sliding bearing 81, articulated seat 82, retaining ring 83, second anti-loosening gasket 84, second round nut 85. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The embodiment of the present application solves the problem of poor control accuracy of a spatial linkage antenna array deployment and retraction mechanism by providing a high-precision control method applicable to a spatial linkage antenna array deployment and retraction mechanism.

[0053] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0054] Example:

[0055] The present invention provides a high-precision control method applicable to a space linkage type antenna array deployment and retraction mechanism, the high-precision control method comprising:

[0056] The deformation caused by gravity is offset by designing the deployment and retraction mechanism with unidirectional internal stress pre-deformation, thereby reducing the deformation of the deployment and retraction mechanism caused by gravity during the deployment and retraction process, thereby achieving a high-precision and repeatable configuration of the deployment and retraction mechanism.

[0057] like Figure 1 As shown, the unfolding and retracting mechanism comprises: a support 10, a scissor arm and a column frame 20;

[0058] The support 10 is provided with a scissor arm that expands and contracts in the horizontal direction;

[0059] The scissor arms are provided with a plurality of column frames 20 arranged in the expansion and contraction direction, each column frame 20 extends vertically, and the antenna array surface is installed on the column frame 20;

[0060] The scissor arm comprises: an upper scissor arm 30 and a lower scissor arm 40;

[0061] The upper portion of the column frame 20 is connected to the upper scissor arm 30 , and the lower portion is connected to the lower scissor arm 40 .

[0062] like Figure 2 As shown, when the extension and retraction mechanism is in the unfolded state, the deformation of the scissor arm is mainly caused by the angular deflection at the hinge position. The scissor arm is composed of a plurality of unit arms between two adjacent hinges. When the upper scissor arm 30 is in the unfolded state, the vertical displacement H of the end of the nth unit arm is:

[0063]

[0064] Wherein, M is the unit arm expansion length between two adjacent hinge points of the upper scissor arm 30;

[0065] θ is the deflection angle of the adjacent unit arms of the upper scissor arm 30 at the corresponding hinge point.

[0066] The unidirectional internal stress pre-deformation comprises:

[0067] The nth unit arm expansion length L of the lower scissor arm 40 is n It is lengthened relative to M, so that internal stress is generated when the extension and retraction mechanism is deployed, driving the scissor arms to deflect upward at an angle of α, satisfying:

[0068] L n =M+a n

[0069] Among them, a n >0, its value is

[0070] The scissor arms are made to present a symmetrical deformation along the midline, and the overall flatness at the installation position of the column frame 40 reaches an optimal state.

[0071] like Figure 1 , Figure 3 As shown, the high-precision control method also includes:

[0072] A synchronous connecting rod mechanism is provided between the upper scissor arm 30 and the lower scissor arm 40 to improve the synchronization rate of the extension and retraction of the upper scissor arm 30 and the lower scissor arm 40;

[0073] The synchronous link mechanism comprises: a fixed hinge point 50, a first link 51, a second link 52 and a third link 53;

[0074] The fixed hinge 50 is arranged on the support 10, the midpoint of the first connecting rod 51 is hinged to the fixed hinge 50, and the two ends of the first connecting rod 51 are hinged to the head ends of the second connecting rod 52 and the third connecting rod 53 respectively;

[0075] The end of the second connecting rod 52 is hinged to the upper scissor arm 30 , and the end of the third connecting rod 53 is hinged to the lower scissor arm 40 . The second connecting rod 52 and the third connecting rod 53 are of equal length.

[0076] like Figure 1 , Figure 3 As shown, the upper connecting rod at the head end of the upper scissor arm 30 is hinged to the support 10, the lower connecting rod at the head end of the upper scissor arm 30 is hinged to the first slider 31, the first slider 31 is slidably connected to the support 10, and the end of the second connecting rod 52 is hinged to the first slider 31;

[0077] The lower connecting rod at the head end of the lower scissor arm 40 is hinged to the support 10, the upper connecting rod at the head end of the lower scissor arm 40 is hinged to the second slider 41, the second slider 41 is slidably connected to the support 10, and the end of the third connecting rod 53 is hinged to the second slider 41;

[0078] The support 10 is provided with a limit stopper for limiting the movement limit positions of the first slider 31 and the second slider 41;

[0079] Pins are provided between the support 10 and the first slider 31 and the second slider 41 for fixing the first slider 31, the second slider 41 and the support 10 after the scissor arms are unfolded or retracted into place.

[0080] like Figure 1 As shown, the high-precision control method also includes:

[0081] A plurality of synchronously operating driving cylinders 60 are arranged on the scissor arms, and the extension directions of all the driving cylinders 60 are parallel to the extension and retraction directions of the scissor arms;

[0082] The driving oil cylinder 60 is self-locking after being deployed to the right position, so as to realize the rigid positioning of the scissor arms along the deployment direction.

[0083] like Figure 4 , Figure 5 As shown, the high-precision control method also includes:

[0084] At the hinge point of the scissor arm, a hinge shaft 70 is used in conjunction with two sets of tapered roller bearings 71 installed back to back to eliminate backlash to achieve a stable hinge connection between the outer connecting rod 72 and the inner connecting rod 73, thereby improving the overall rigidity of the scissor arm and reducing the deformation of the extension and retraction mechanism;

[0085] The outer connecting rod 73 is provided with an outer reaming hole, and the inner connecting rod 73 is provided with an inner reaming hole;

[0086] The head end of the hinge shaft 70 is connected with the outer reaming hole by interference fit, and the end end is connected with the inner reaming hole bearing through two sets of tapered roller bearings 71 installed back to back, so as to realize the hinge connection between the outer connecting rod 72 and the inner connecting rod 73;

[0087] The end of the hinge shaft 70 is provided with a first stud, and two sets of tapered roller bearings 71 are installed back to back in the inner reaming hole. The end of the hinge shaft 70 passes through the two sets of tapered roller bearings 71 and is threadedly connected with two first round nuts 74. The first round nuts 74 are tightened with torque to eliminate the gap and press the two sets of tapered roller bearings 71; a first anti-loosening gasket 75 is arranged between the two first round nuts 74 to prevent the first round nuts 74 from loosening;

[0088] A cover 76 is installed at the inner end of the inner reaming hole to prevent sand and dust from entering;

[0089] The inner connecting rod 73 is provided with a grease injection port 77 connected to the inner reaming hole, which is used for regularly injecting grease into the tapered roller bearing 71 to ensure smooth rotation.

[0090] like Figure 4 , Figure 6 As shown, the high-precision control method also includes:

[0091] The column frame 20 is connected to the column frame hinge seat 80 at the head end of the hinge shaft 70 of the scissor arm, so that even if the upper scissor arm 30 and the lower scissor arm 40 are out of sync during the extension and retraction process, the column frame 20 can still maintain axial force, thereby preventing the column frame 20 from generating radial stress and causing deformation or even fracture;

[0092] The column frame hinge seat 80 includes: a sliding bearing 81, a hinge seat 82, a retaining ring 83, a second anti-loosening washer 84 and a second round nut 85;

[0093] The hinge seat 82 is connected to the hinge shaft 70 through a sliding bearing 81, and the column frame 20 is fixedly connected to the hinge seat 82;

[0094] One end of the sliding bearing 81 is limited by the shoulder of the hinge shaft 70, and the other end is limited by the retaining ring 83;

[0095] The hinge shaft 70 is provided with a second stud at its head end. The second stud passes through a retaining ring 83 and a second anti-loosening washer 84 in sequence and is threadedly connected with a second round nut 85 .

[0096] In summary, compared with the prior art, the present invention has the following beneficial effects:

[0097] 1. In the embodiment of the present invention, the high-precision control method offsets the deformation caused by gravity by designing the unidirectional internal stress pre-deformation of the deployment and retraction mechanism, reduces the deformation of the deployment and retraction mechanism caused by gravity during the deployment and retraction process, makes the scissor arms present a symmetrical deformation along the midline, and achieves the best overall flatness at the installation position of the column frame 40, thereby realizing a high-precision and repeatable configuration of the deployment and retraction mechanism.

[0098] 2. In the embodiment of the present invention, the high-precision control method improves the synchronization rate of the extension and retraction of the upper scissor arm 30 and the lower scissor arm 40 by setting a synchronous connecting rod mechanism between the upper scissor arm 30 and the lower scissor arm 40, thereby further ensuring the control accuracy of the extension and retraction mechanism.

[0099] 3. In the embodiment of the present invention, the high-precision control method is implemented by arranging a plurality of synchronously operating driving cylinders 60 on the scissor arms. The driving cylinders 60 are self-locked after being deployed into position, thereby achieving rigid positioning of the scissor arms along the deployment direction, and further ensuring the control accuracy of the deployment and retraction mechanism.

[0100] 4. In the embodiment of the present invention, the high-precision control method realizes the stable articulation of the outer connecting rod 72 and the inner connecting rod 73 by using a hinge shaft 70 at the hinge point of the scissor arm in conjunction with two sets of tapered roller bearings 71 installed back to back to eliminate clearance, thereby improving the overall rigidity of the scissor arm, reducing the deformation of the deployment mechanism, and further ensuring the control accuracy of the deployment mechanism.

[0101] 5. In the embodiment of the present invention, the high-precision control method connects the column frame 20 through the column frame articulated seat 80 at the head end of the hinge shaft 70 of the scissors arm, so that even if the upper scissors arm 30 and the lower scissors arm 40 are out of sync during the extension and retraction process, the column frame 20 can still maintain axial force, avoiding radial stress on the column frame 20 that causes deformation or even fracture, thereby further ensuring the control accuracy of the extension and retraction mechanism.

[0102] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0103] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-precision control method for a space-link antenna array deployment and retraction mechanism, characterized in that: The high-precision control method comprises: The length L of the nth unit arm of the lower scissor arm (40) is n It is lengthened relative to M, so that internal stress is generated when the extension and retraction mechanism is deployed, driving the scissor arms to deflect upward at an angle of α, satisfying: L n =M+a n Wherein, M is the unit arm expansion length of the upper scissor arm (30); a n >0, its value is nθ is the deflection angle of the nth unit arm of the upper scissor arm (30) relative to the first unit arm.

2. The high-precision control method for a spatial linkage antenna array deployment and retraction mechanism according to claim 1, characterized in that: The unfolding and retracting mechanism comprises: a support (10), a scissor arm and a column frame (20); The support (10) is provided with a scissor arm that is extended and retracted in the horizontal direction; The scissor arms are provided with a plurality of column frames (20) arranged in the expansion and contraction direction, and each column frame (20) extends vertically; The scissor arm comprises: an upper scissor arm (30) and a lower scissor arm (40); The upper part of the column frame (20) is connected to the upper scissor arm (30), and the lower part is connected to the lower scissor arm (40).

3. The high-precision control method for a space-link antenna array deployment and retraction mechanism as claimed in claim 1, characterized in that: When the upper scissor arm (30) is in the unfolded state, the vertical displacement H of the end of the nth unit arm is: Wherein, θ is the deflection angle of adjacent unit arms of the upper scissor arm (30) at the corresponding hinge point.

4. The high-precision control method for a spatial linkage antenna array deployment and retraction mechanism as claimed in claim 2, characterized in that: The high-precision control method further comprises: A synchronous connecting rod mechanism is arranged between the upper scissor arm (30) and the lower scissor arm (40); The synchronous link mechanism comprises: a fixed hinge point (50), a first link (51), a second link (52) and a third link (53); The fixed hinge point (50) is arranged on the support (10), the midpoint of the first connecting rod (51) is hinged to the fixed hinge point (50), and the two ends of the first connecting rod (51) are respectively hinged to the head ends of the second connecting rod (52) and the third connecting rod (53); The end of the second connecting rod (52) is hinged to the upper scissor arm (30), and the end of the third connecting rod (53) is hinged to the lower scissor arm (40). The second connecting rod (52) and the third connecting rod (53) are of equal length.

5. The high-precision control method for a space-link antenna array deployment and retraction mechanism as claimed in claim 4, characterized in that: The upper connecting rod at the head end of the upper scissor arm (30) is hinged to the support (10), the lower connecting rod at the head end of the upper scissor arm (30) is hinged to the first slider (31), the first slider (31) is slidably connected to the support (10), and the end of the second connecting rod (52) is hinged to the first slider (31); The lower connecting rod at the head end of the lower scissor arm (40) is hinged to the support (10), the upper connecting rod at the head end of the lower scissor arm (40) is hinged to the second slider (41), the second slider (41) is slidably connected to the support (10), and the end of the third connecting rod (53) is hinged to the second slider (41); The support (10) is provided with a limit stopper plate for limiting the movement limit positions of the first sliding block (31) and the second sliding block (41); A latch is provided between the support (10) and the first slider (31) and the second slider (41), and is used to fix the first slider (31), the second slider (41) and the support (10) after the scissor arms are unfolded or retracted into place.

6. The high-precision control method for a spatial linkage antenna array deployment and retraction mechanism as claimed in claim 2, characterized in that: The high-precision control method further comprises: A plurality of synchronously operating driving cylinders (60) are arranged on the scissor arms, and the extension directions of all the driving cylinders (60) are parallel to the extension and retraction directions of the scissor arms; The driving oil cylinder (60) is self-locking after being deployed into position, thereby realizing the rigid positioning of the scissor arms along the deployment direction.

7. The high-precision control method for a spatial linkage antenna array deployment and retraction mechanism as claimed in claim 2, characterized in that: The high-precision control method further comprises: At the hinge point of the scissor arm, a hinge shaft (70) is used in conjunction with two sets of tapered roller bearings (71) installed back to back to eliminate backlash to stably hinge the outer connecting rod (72) and the inner connecting rod (73); The outer connecting rod (73) is provided with an outer reaming hole, and the inner connecting rod (73) is provided with an inner reaming hole; The head end of the hinge shaft (70) is interference-connected with the outer reaming hole, and the end end is connected to the inner reaming hole bearing through two sets of tapered roller bearings (71) installed back to back, so as to realize the hinge connection between the outer connecting rod (72) and the inner connecting rod (73); The end of the hinge shaft (70) is provided with a first stud, and two groups of tapered roller bearings (71) are installed back to back in the inner reaming hole. The end of the hinge shaft (70) passes through the two groups of tapered roller bearings (71) and is threadedly connected with two first round nuts (74). The first round nuts (74) are tightened with torque to eliminate the gap and press the two groups of tapered roller bearings (71); a first anti-loosening gasket (75) is arranged between the two first round nuts (74).

8. The high-precision control method for a space-linked antenna array deployment and retraction mechanism as claimed in claim 7, characterized in that: A sealing cover (76) is installed at the inner end of the inner reaming hole to prevent sand, dust and foreign matter from entering.

9. The high-precision control method for a spatial linkage antenna array deployment and retraction mechanism according to claim 7, characterized in that: The inner connecting rod (73) is provided with a grease injection port (77) connected to the inner reaming hole, and is used for regularly injecting grease into the tapered roller bearing (71).

10. The high-precision control method for a space-link antenna array deployment and retraction mechanism according to claim 7, characterized in that: The high-precision control method further comprises: The hinge shaft (70) of the scissor arm is connected to the column frame (20) via a column frame hinge seat (80); The column frame hinge seat (80) comprises: a sliding bearing (81), a hinge seat (82), a retaining ring (83), a second anti-loosening washer (84) and a second round nut (85); The hinge seat (82) is connected to the hinge shaft (70) through a sliding bearing (81), and the column frame (20) is fixedly connected to the hinge seat (82); One end of the sliding bearing (81) is limited by the shaft shoulder of the hinge shaft (70), and the other end is limited by the retaining ring (83); The hinge shaft (70) is provided with a second stud at the head end, and the second stud passes through the retaining ring (83) and the second anti-loosening gasket (84) in sequence and is threadedly connected with the second round nut (85).

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