Single degree of freedom conical axial and radial synchronous deployment mechanism

Abstract

The application provides a single-degree-of-freedom conical axial and radial synchronous deployment mechanism and belongs to the technical field of aircrafts; the structure arrangement between the main supporting rod and the auxiliary supporting rod is connected, so that the fixed ring arranged in the axial direction can realize the deployment of the whole conical mechanism, the rigidity of the whole conical mechanism is good, and the structure is simple; the structure arrangement of the two groups of supporting components makes the whole conical mechanism have the structural characteristics of single degree of freedom, simple structure and high rigidity, and makes the deployment ratio of the whole conical mechanism larger. The application comprises a main supporting rod and an auxiliary supporting rod, further comprises a fixed ring, an upper supporting component and a lower supporting component; the auxiliary supporting rod is arranged above the main supporting rod, the fixed ring is arranged above the auxiliary supporting rod, the upper supporting component is arranged between the main supporting rod and the auxiliary supporting rod, and the lower supporting component is arranged below the main supporting rod; 24 third rotating pairs are equiangularly arranged on the fixed ring, and the auxiliary supporting rod is connected to one end of the third rotating pair.

Description

TECHNICAL FIELD

[0001] The present application relates to a single degree of freedom conical axial radial synchronous deployment mechanism, in particular to the field of aircraft technology. BACKGROUND

[0002] Due to the limited accommodation space of the carrier, the space deployable mechanism is widely used in the design of aircraft load, and the conical deployable mechanism can be applied to protective devices, satellite antennas and many application scenarios;

[0003] The radial deployable mechanism is generally realized by a scissors mechanism, which is not collapsible or even elongated in the axial direction, and the axial deployable mechanism is usually realized by an inwardly folded two-link mechanism. This mechanism needs to lock the hinge joint to realize the movement locking after the deployment of the mechanism, which also makes the mechanism heavy and complex in structure. SUMMARY

[0004] The purpose of the present application is to provide a single degree of freedom conical axial radial synchronous deployment mechanism to ensure good deployment rigidity of the conical mechanism and simpler structure.

[0005] To solve the above technical problems, the technical scheme adopted by the present application is: the present application comprises a main support rod and a secondary support rod, and further comprises a fixed ring, an upper support assembly and a lower support assembly;

[0006] The secondary support rod is arranged above the main support rod, the fixed ring is arranged above the secondary support rod, the upper support assembly is arranged between the main support rod and the secondary support rod, and the lower support assembly is arranged below the main support rod.

[0007] Further, the deployment mechanism is driven by the fixed ring, and the deployment of the conical mechanism is realized by the cooperation of the upper support assembly and the lower support assembly, and the mechanism has the advantages of simple structure, light weight and high rigidity.

[0008] The fixed ring is equiangularly installed with 24 third rotation pairs, one end of the third rotation pair is connected with the secondary support rod, the other end of the secondary support rod is connected with the second rotation pair, and the third rotation pair is in the same plane;

[0009] Further, the deployment mechanism is driven and deployed by the fixed ring, and the support of the deployment mechanism is completed by the cooperation of the second rotation pair and the secondary support rod.

[0010] The center of the fixed ring intersects with the straight line perpendicular to the axis of the third rotation pair, that is, the axis is perpendicular to the diameter of the fixed ring;

[0011] Further, the third rotation pair makes the deployment mechanism more stable.

[0012] The upper layer support assembly comprises a hook joint and a support rib plate;

[0013] The second rotating pair is provided with a hook joint, one end of the hook joint is connected with a support rib plate, two support rib plates are provided, and the two support rib plates are connected together.

[0014] Further, the support rib plate can be expanded and contracted through cooperation of the second rotating pair and the hook joint.

[0015] The lower layer support assembly comprises a first rotating pair, a first annular support rod, a second annular support rod and a third annular support rod; the main support rod is connected with the first rotating pair at the bottom end, the other end of the first rotating pair is connected with the first annular support rod, four first annular support rods are provided corresponding to the main support rod, the second annular support rod and the third annular support rod are provided between adjacent two first annular support rods, and the second annular support rod and the third annular support rod are connected together.

[0016] The first annular support rod, the second annular support rod and the third annular support rod are all provided with four groups, and the four groups of the first annular support rod, the second annular support rod and the third annular support rod cooperate to form a complete circular support after expansion.

[0017] Further, the structure is supported through cooperation of the main support rod and the first rotating pair, and the first annular support rod, the second annular support rod and the third annular support rod cooperate to form a complete circular support after expansion.

[0018] The second rotating pair and the second rotating pair have a certain inclination angle, the main support rod and the first rotating pair have a certain inclination angle, and the two groups of inclination angles are the same.

[0019] Further, by ensuring that the inclination angles between the 24 secondary support rods and the second rotating pair are consistent, the inclination angles ensure that the four main support rods do not interfere with each other in the inwardly retracted state.

[0020] The beneficial effects of the present application are:

[0021] 1. The structure of the connection between the main support rod and the secondary support rod can realize the expansion of the whole conical mechanism through the axial arrangement of the fixed circular ring, and the whole conical mechanism has good rigidity and simple structure.

[0022] 2. The structure of the two groups of support assemblies has the structure characteristics of single degree of freedom, simple structure and high rigidity, and the expansion and contraction ratio of the whole conical mechanism is larger. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the first rotating pair structure of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the second annular support rod and the third annular support rod of the present invention;

[0026] Figure 4 This is a schematic diagram of the supporting rib structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the folded structure of the overall structure of the present invention.

[0028] 1. Main support rod; 2. First rotation pair; 3. Second rotation pair; 4. First annular support rod; 5. Second annular support rod; 6. Third annular support rod; 7. Secondary support rod; 8. Hooke's hinge; 9. Support rib; 10. Fixed ring; 11. Third rotation pair. DETAILED DESCRIPTION

[0029] The following will be combined with the Figures 1-5 , clearly and completely describe the technical solutions in the embodiments.

[0030] Specific implementation method 1: Figure 1 and Figure 4 As shown, the overall structure includes a fixed ring 10, an upper support assembly and a lower support assembly. The upper end of the main support rod 1 is connected to the upper support assembly, and the lower end of the main support rod 1 is connected to the lower support assembly. The upper support assembly and the lower support assembly are controlled to be expanded and retracted through the fixed ring 10, thereby making the overall conical mechanism have the structural characteristics of single degree of freedom, simple structure, and high rigidity, and making the overall cone expansion and contraction ratio larger;

[0031] The outside of the fixed ring 10 is rotatably connected to 24 third rotating pairs 11 at equal angles. The center of the fixed ring 10 intersects a straight line perpendicular to the axis of the third rotating pair 11, that is, the axis is perpendicular to the diameter of the fixed ring 10. The other ends of the 24 third rotating pairs 11 are rotatably connected to the auxiliary support rods 7. At this time, the 24 auxiliary support rods 7 are rotatably arranged below the fixed ring 10, so that the fixed ring 10 can drive the auxiliary support rods 7 to rotate through the third rotating pairs 11.

[0032] The other end of the auxiliary support rod 7 is rotatably connected to the second rotating pair 3, and a Hooke's hinge 8 is rotatably provided inside the second rotating pair 3. One end of the Hooke's hinge 8 is rotatably connected to a supporting rib 9. There are two supporting ribs 9, and the two supporting ribs 9 are rotatably connected together, so that the auxiliary support rod 7 drives the two supporting ribs 9 to rotate through the second rotating pair 3 and the Hooke's hinge 8, thereby realizing multi-angle expansion and contraction of the structure;

[0033] The axis of the Hooke's hinge 8 connected to the supporting rib 9 is arranged parallel to the axis of the second revolute pair 3 and the axis of the other Hooke's hinge 8. The three axes are in the same plane, that is, the line connecting the three axes is a straight line. The position of the Hooke's hinge 8 and the supporting rib 9 is the dead point of the structure, thereby limiting the final deployment position of the mechanism.

[0034] There are 24 second rotation pairs 3 corresponding to the secondary support rods 7, and four main support rods 1 are fixedly connected at equal angles below the 24 second rotation pairs 3. At this time, the four main support rods 1 and four of the 24 secondary support rods 7 are arranged in the same straight line, and the main support rods 1 can be driven to move through the secondary support rods 7;

[0035] Specific implementation method 2: Figures 2-3 and Figure 5 As shown, the other end of the main support rod 1 is rotatably connected to the first rotating pair 2, and the other end of the first rotating pair 2 is rotatably connected to the first annular support rod 4. Four first annular support rods 4 are provided corresponding to the main support rod 1, and a second annular support rod 5 and a third annular support rod 6 are rotatably provided between two adjacent first annular support rods 4. The second annular support rod 5 and the third annular support rod 6 are rotatably connected together. Four groups of the first annular support rod 4, the second annular support rod 5 and the third annular support rod 6 are provided. The four groups of the first annular support rod 4, the second annular support rod 5 and the third annular support rod 6 cooperate to form a complete circular support that forms the bottom after expansion, so that the overall structure can be stably expanded and collapsed.

[0036] By setting the inclination angle between the secondary support rod 7 and the second rotating pair 3 to be the same as the inclination angle between the main support rod 1 and the first rotating pair 2, there is no interference between the rods when the four main support rods 1 are in the inward retracted state, so that the overall conical mechanism has the structural characteristics of single degree of freedom, simple structure, and high rigidity, and the expansion and contraction ratio of the overall cone is larger.

[0037] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present invention, within the spirit and principles of the present invention, without departing from the content of the technical solution of the present invention, shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A single-degree-of-freedom conical axial and radial synchronous expansion and contraction mechanism, comprising a main support rod (1) and a secondary support rod (7), characterized in that: It also includes a fixed ring (10), an upper support assembly and a lower support assembly; A secondary support rod (7) is provided above the main support rod (1), a fixed ring (10) is provided above the secondary support rod (7), an upper support assembly is provided between the main support rod (1) and the secondary support rod (7), and a lower support assembly is provided below the main support rod (1); 24 third rotation pairs (11) are installed at equal angles on the fixed ring (10), one end of the third rotation pair (11) is connected to the auxiliary support rod (7), and the other end of the auxiliary support rod (7) is connected to the second rotation pair (3), and the third rotation pairs (11) are all in the same plane; The upper support assembly includes a Hooke's hinge (8) and a support rib (9); a Hooke's hinge (8) is provided on the inner side of the second rotating pair (3); one end of the Hooke's hinge (8) is connected to the support rib (9); two support ribs (9) are provided, and the two support ribs (9) are connected together.

2. A single-degree-of-freedom conical axial and radial synchronous expansion and contraction mechanism according to claim 1, characterized in that: The center of the fixed ring (10) intersects a straight line perpendicular to the axis of the third rotating pair (11), that is, the axis is perpendicular to the diameter of the fixed ring (10).

3. The single-degree-of-freedom conical axial and radial synchronous expansion and contraction mechanism according to claim 1, characterized in that: The lower support assembly comprises a first rotating pair (2), a first annular support rod (4), a second annular support rod (5) and a third annular support rod (6); The bottom end of the main support rod (1) is connected to a first rotating pair (2), and the other end of the first rotating pair (2) is connected to a first annular support rod (4). Four first annular support rods (4) are provided corresponding to the main support rods (1). A second annular support rod (5) and a third annular support rod (6) are provided between two adjacent first annular support rods (4), and the second annular support rod (5) and the third annular support rod (6) are connected together.

4. The single-degree-of-freedom conical axial and radial synchronous expansion and contraction mechanism according to claim 1, characterized in that: Four groups of the first annular support rod (4), the second annular support rod (5) and the third annular support rod (6) are provided. The four groups of the first annular support rod (4), the second annular support rod (5) and the third annular support rod (6) cooperate to form a complete circular support that forms a bottom after being unfolded.

5. The single-degree-of-freedom conical axial and radial synchronous expansion and contraction mechanism according to claim 1, characterized in that: There is a certain tilt angle between the auxiliary support rod (7) and the second rotation pair (3), and there is a certain tilt angle between the main support rod (1) and the first rotation pair (2). The two sets of tilt angles are set to the same. The tilt angles ensure that no interference occurs between the four main support rods (1) when they are in an inwardly retracted state.

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