CN107745831A - Annular deployable mechanism - Google Patents

Abstract

The invention proposes a ring-shaped expandable mechanism, which is composed of a long ring section and a short ring section; hinges are installed on the upper and lower side edges of both ends of the long ring section; hinges are installed on the upper and lower side edges of both ends of the short ring section; , a long ring segment is only hinged to the short ring segment at the hinges at both ends of the upper or lower side, and a short ring segment is only hinged to the long ring segment at two diagonal hinges; when unfolded, it is A single-layer ring structure formed by long ring segments and short ring segments at intervals; when folded, it is turned into a three-layer cylindrical structure by hinges, the upper and lower layers are composed of long ring segments, the middle layer is composed of short ring segments, and the upper layer is composed of long ring segments. The ring segments are connected to the two adjacent short ring segments of the middle layer by hinges at both ends of the lower side, and the long ring segments of the lower layer are connected to the two adjacent short ring segments of the middle layer by hinges at both ends of the upper side. . The present invention is applicable to working conditions where the ring structure needs to be collapsed into a smaller ring structure and the ring structure itself cannot be collapsed during the collapse process.

Description

Ring Expandable Mechanism

technical field

The invention relates to the field of space systems, in particular to a ring-shaped expandable mechanism, which is a product unfolding mechanism in which both the working and folded states are ring-shaped, and the structure itself can only be segmented and cannot be folded.

Background technique

In some specific occasions or special structural designs, such as space systems, it is required that the ring structure can be folded to a smaller size and have the function of self-expansion.

Currently, most of the ring structure expansion schemes adopt the design form of truss structure, and use tetrahedron or hexahedron expansion units to realize the ring structure expansion. However, under special working conditions, it is necessary to fold the ring structure into a smaller ring structure. In addition, due to the limitations of the use environment, the ring structure itself cannot be folded during the folding process, and can only be divided into limited segments. Faced with such a special The needs of the existing ring-shaped structure cannot be met by the current deployment scheme, and it is necessary to design a deployment scheme suitable for this type of working condition according to this special working condition and demand.

Contents of the invention

In order to solve the problems existing in the prior art, the present invention proposes a ring-shaped expandable mechanism, which can fold the ring-shaped structure into a smaller-sized ring-shaped structure, and meet the requirement that the ring-shaped structure itself cannot be folded during the folding process, and can only be segmented into limited segments. Requirements, the unfolded state of the present invention is a ring, and the folded state is a cylinder.

Technical scheme of the present invention is:

The annular expandable mechanism is characterized in that it consists of several long ring segments and several short ring segments;

The long ring segments are divided into two types: the first type of long ring segments are equipped with hinges at both ends of the upper side, and the second type of long ring segments are equipped with hinges at both ends of the lower side;

The short ring segments are divided into two categories: when the inner arc of the short ring segment is the forward direction, the first type of short ring segment is equipped with hinges on the lower edge of the left end and the upper edge of the right end, and the second type of short ring segment Hinges are installed on the upper edge of the left end of the segment and the lower edge of the right end;

One end of a long ring segment is connected to a first-type short ring segment by a hinge, and the other end is connected to a second-type short ring segment by a hinge; one end of a short ring segment is connected to a first-type long ring segment by a hinge, and the other end is connected by a hinge a category II long ring segment;

When the annular expandable mechanism is in the unfolded state, the annular expandable mechanism is a single-layer ring structure formed by long ring segments and short ring segments at intervals; when the annular expandable mechanism is in the folded state, the When the hinge is turned over, the annular expandable mechanism is a three-layer cylindrical structure, the upper layer is composed of one type of long ring segments, the lower layer is composed of another type of long ring segments, and the middle layer is composed of two types of short ring segments alternately along the circumferential direction.

The annular expandable mechanism is characterized in that it consists of several long ring segments and several short ring segments;

The long ring section is equipped with hinges on the upper and lower edges of both ends; the short ring section is equipped with hinges on the upper and lower edges of both ends; The hinge is hinged to the short ring segment, and a short ring segment is only hinged to the long ring segment at two diagonal hinges;

When the annular expandable mechanism is in the unfolded state, the annular expandable mechanism is a single-layer ring structure formed by long ring segments and short ring segments at intervals; when the annular expandable mechanism is in the folded state, the The hinge is turned over, and the ring-shaped expandable mechanism is a three-layer cylindrical structure. The upper and lower layers are composed of long ring segments, and the middle layer is composed of short ring segments. The two adjacent short ring segments are connected by hinges, and the long ring segments of the lower layer are hinged to the two adjacent short ring segments of the middle layer through the hinges at both ends of the upper side.

Beneficial effect

The present invention is applicable to working conditions where the annular structure needs to be collapsed into a smaller-sized annular structure and the annular structure itself cannot be collapsed during the folding process, and fills the technical blank of this design scheme.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Figure 1: Schematic diagram of the unfolded state of the ring structure;

Figure 2: Schematic diagram of the ring structure unfolding process;

Figure 3: Schematic diagram of the folded state of the ring structure (top view);

Figure 4: Schematic diagram of the closed state of the ring structure (side view);

Among them: 1. hinge; 2. ring segment.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation indicated by rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as limiting the invention.

As shown in FIG. 1 , the annular expandable mechanism in this embodiment is composed of several long ring segments and several short ring segments.

As shown in Figure 2, the long ring segments are divided into two categories: hinges are installed on both ends of the upper side of the first type of long ring segment, and hinges are installed on the two ends of the lower side of the second type of long ring segment; The short ring segments are divided into two types: when the inner arc of the short ring segment is the positive direction facing forward, the first type of short ring segment is equipped with hinges on the lower edge of the left end and the upper edge of the right end, and the second type of short ring segment is equipped with hinges on the left end Hinges are installed on the upper side edge and the right end lower side edge.

One end of a long ring segment is connected to a first-type short ring segment by a hinge, and the other end is connected to a second-type short ring segment by a hinge; one end of a short ring segment is connected to a first-type long ring segment by a hinge, and the other end is connected by a hinge A long ring segment of the second category.

As shown in Fig. 2 and Fig. 4, when the annular expandable mechanism is in the expanded state, the annular expandable mechanism is a single-layer ring structure formed by long ring segments and short ring segments at intervals; when the ring When the expandable mechanism is in the folded state, it is turned over by the hinge. The circular expandable mechanism is a three-layer cylindrical structure. The upper layer is composed of one type of long ring segments, the lower layer is composed of another type of long ring segments, and the middle layer is composed of two types of short ring segments. The segments alternate along the circumference.

Of course, in order to facilitate unified processing, a unified long ring segment and a unified short ring segment can be used. The long ring section is equipped with hinges on the upper and lower edges of both ends; the short ring section is equipped with hinges on the upper and lower edges of both ends; The hinges are hinged to the short ring segments, and a short ring segment is only hinged to the long ring segments at two diagonal hinges.

When the annular expandable mechanism is in the unfolded state, the annular expandable mechanism is a single-layer ring structure formed by long ring segments and short ring segments at intervals; when the annular expandable mechanism is in the folded state, the The hinge is turned over, and the ring-shaped expandable mechanism is a three-layer cylindrical structure. The upper and lower layers are composed of long ring segments, and the middle layer is composed of short ring segments. The two adjacent short ring segments are connected by hinges, and the long ring segments of the lower layer are hinged to the two adjacent short ring segments of the middle layer through the hinges at both ends of the upper side.

The present invention is applicable to working conditions where the annular structure needs to be collapsed into a smaller-sized annular structure and the annular structure itself cannot be collapsed during the folding process, and fills the technical blank of this design scheme.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limitations to the present invention. Variations, modifications, substitutions, and modifications to the above-described embodiments are possible within the scope of the present invention.

Claims (2)

1. A ring-shaped expandable mechanism, characterized in that: it is composed of several long ring segments and some short ring segments; The long ring segments are divided into two types: the first type of long ring segments are equipped with hinges at both ends of the upper side, and the second type of long ring segments are equipped with hinges at both ends of the lower side; The short ring segments are divided into two categories: when the inner arc of the short ring segment is the forward direction, the first type of short ring segment is equipped with hinges on the lower edge of the left end and the upper edge of the right end, and the second type of short ring segment Hinges are installed on the upper edge of the left end of the segment and the lower edge of the right end; One end of a long ring segment is connected to a first-type short ring segment by a hinge, and the other end is connected to a second-type short ring segment by a hinge; one end of a short ring segment is connected to a first-type long ring segment by a hinge, and the other end is connected by a hinge a category II long ring segment; When the annular expandable mechanism is in the unfolded state, the annular expandable mechanism is a single-layer ring structure formed by long ring segments and short ring segments at intervals; when the annular expandable mechanism is in the folded state, the When the hinge is turned over, the annular expandable mechanism is a three-layer cylindrical structure, the upper layer is composed of one type of long ring segments, the lower layer is composed of another type of long ring segments, and the middle layer is composed of two types of short ring segments alternately along the circumferential direction. 2. A ring-shaped expandable mechanism, characterized in that: it consists of several long ring segments and several short ring segments; The long ring section is equipped with hinges on the upper and lower edges of both ends; the short ring section is equipped with hinges on the upper and lower edges of both ends; The hinge is hinged to the short ring segment, and a short ring segment is only hinged to the long ring segment at two diagonal hinges; When the annular expandable mechanism is in the unfolded state, the annular expandable mechanism is a single-layer ring structure formed by long ring segments and short ring segments at intervals; when the annular expandable mechanism is in the folded state, the The hinge is turned over, and the ring-shaped expandable mechanism is a three-layer cylindrical structure. The upper and lower layers are composed of long ring segments, and the middle layer is composed of short ring segments. The two adjacent short ring segments are connected by hinges, and the long ring segments of the lower layer are hinged to the two adjacent short ring segments of the middle layer through the hinges at both ends of the upper side.