CN109432798B - Regular tetrahedron-like telescopic variable structure - Google Patents

Abstract

The invention relates to the field of shearing type machinery, in particular to a regular tetrahedron-like telescopic variable structure which comprises 4 variable expansion surfaces and a plurality of connecting pieces, wherein the 4 variable expansion surfaces are connected and spliced into a regular tetrahedron-like structure by the connecting pieces; the variable expansion surface consists of 3 triangular groups; the triangle group comprises two triangle pieces; the triangular piece is an isosceles triangle, and a surface area pivoting part is arranged in any vertex of the middle part, the bottom edge and/or the bottom of the isosceles triangle; in the 3 triangular groups, adjacent group pivoting parts between the three triangular groups are sequentially aligned and hinged through a connecting piece, so that the 3 triangular groups in the variable expansion surface form a closed annular or triangular-like surface; the position of the surface area and surface area pivoting part of the triangular piece in the regular tetrahedron-like telescopic variable structure can be freely selected according to actual application requirements, and the application range of the regular tetrahedron-like telescopic variable structure is greatly expanded.

Description

Regular tetrahedron-like telescopic variable structure

Technical Field

The invention relates to the field of shearing type machinery, in particular to a four-side-like telescopic variable structure.

Background

Scissor mechanisms are currently used and developed in a wide variety of applications, such as collapsible tents, retractable curtains, elevators, foldable table lights or robotic arms. It features large expansion ratio, long distance and span, and small space after it is contracted, so it is used in many industries. At present, most of scissor mechanisms are applied to a single-side scissor mechanism or a double-parallel scissor mechanism, for example, a single-side scissor mechanism is adopted for a door curtain, a double-parallel scissor mechanism is adopted for an elevator, and most of the scissor mechanisms are single in structure and cannot be used in special occasions.

The invention patent with patent number CN 201510398913.8 discloses a similar cube-shaped telescopic variable structure on 21.10.2015, each face of the cube is formed by hinging four sets of triangular pieces, the middle parts of the bottom edges of two triangular pieces in each set of triangular pieces are provided with pivoting parts, and the two triangular pieces are rotatably hinged through the pivoting parts in the middle parts. Because the two triangular pieces are required to be connected by the pivoting part in the middle, the stretching change of each surface of the telescopic variable structure of the cube is completely the same and single, and only the specific structure of the cube with single stretching change can be applied in practical application, so that the application range is limited.

Disclosure of Invention

In view of the above-mentioned drawbacks, the present invention aims to provide a regular tetrahedron-like telescopic variable structure, wherein the regular tetrahedron-like structure is integrally tapered, the change between the telescopic surfaces is tapered, the position of the rotary hinge between two triangular components in each group of triangular groups can be selected according to actual requirements, and each surface formed by three groups of triangular groups after each rotary hinge is connected by a special connecting component can be assembled into a regular tetrahedron-like structure.

In order to achieve the purpose, the invention adopts the following technical scheme:

a kind of regular tetrahedron's flexible variable structure, characterized by, including 4 variable expansion surfaces and multiple link, 4 said variable expansion surfaces connect splice into a kind of regular tetrahedron by the said link; the variable expansion surface consists of 3 triangular groups; the triangle group comprises two triangle pieces.

Specifically, the triangular piece is an isosceles triangle, and the middle part or the bottom edge of the isosceles triangle is provided with a surface area pivoting part; two vertexes of the bottom edge of the isosceles triangle are provided with second pivoting parts; the two triangular pieces in the triangular group are overlapped to be arranged and are aligned through the two face area pivoting parts, and connecting pieces are arranged in the face area pivoting parts, so that the two triangular pieces in the triangular group can rotate around the face area pivoting parts in parallel; in the rotating process of the two triangular pieces, a second pivoting part close to an adjacent triangular group is an adjacent group pivoting part, and a second pivoting part located at the periphery of the variable expansion surface is an on-edge pivoting part; in the 3 triangular groups, adjacent group pivoting parts between the three triangular groups are sequentially aligned and hinged through a connecting piece, so that the 3 triangular groups in the variable expansion surface form a closed annular or triangular-like surface; two adjacent variable expansion surfaces are hinged with each other through a bending connecting piece, and the two upper pivoting parts of the edges, which are positioned on the same edge and are opposite to each other, are hinged with each other; so that 4 variable expansion surfaces are spliced into a regular tetrahedron.

Specifically, the adjacent group pivoting parts are circular holes or circular ring structures arranged on the triangular piece, and the two adjacent group pivoting parts are hinged through rotating shaft pins.

Specifically, the upper edge pivoting parts are round holes or circular ring structures arranged at the top points of the bottom edges of the triangular pieces, and the two upper edge pivoting parts are hinged through a bent connecting piece; the bending connecting piece is in a V shape, the included angle of two opposite bending edges is 70.53 degrees, and the two opposite bending edges are both provided with a rotating connecting hole; and a rotating shaft pin is arranged in the rotating connecting hole.

Preferably, the vertex angle degree of the triangular piece is 120 degrees, and the triangular piece is an isosceles triangle frame or an isosceles triangle plate;

in order to save the difficulty related to manufacturing and installation, the arrangement position of the face area pivot joint part is preferably provided with the following four specific schemes: the surface area pivoting part is arranged at the geometric center in the inner triangular area of the triangular piece; or the center of the bottom edge of the triangular piece is provided with the surface area pivoting part; or the area between the center of the bottom edge of the triangular piece and the top point of the bottom edge is provided with the surface area pivoting part; or the surface area pivoting part of the triangular piece is superposed with the adjacent group pivoting part.

Preferably, a deformation driving device for controlling the deformation of the telescopic variable structure is arranged, and the deformation driving device is arranged in the telescopic variable structure; the deformation driving device is an air cylinder pushing device, and the air cylinder pushing device realizes the expansion and the furling of the telescopic variable structure by changing the position of any one or more pivoting parts on the edges.

Preferably, the deformation driving device is a motor rotating device, and the motor rotating device realizes the expansion and the furling of the telescopic variable structure by changing the relative positions of two triangular pieces in any one or more groups of the triangular groups; the motor rotating device is arranged at the middle position pivoting part of any one group of the triangular pieces, the motor body is arranged on one of the triangular pieces, and the motor spindle is connected with the other triangular piece of the group of the triangular pieces.

The invention provides a regular tetrahedron-like telescopic variable structure, compared with the prior art, a regular tetrahedron structure formed by 4 variable expansion surface surrounding groups can realize the expansion or folding change of the whole structure of the regular tetrahedron-like structure by changing the position of a pin joint part on any edge of the regular tetrahedron, the volume of the expansion structure is about 1.2-3.5 of the volume of the contraction structure, the telescopic change space is larger, in addition, the hinge joint position of a triangular piece in each triangular group in the regular tetrahedron can be freely selected according to the actual application requirement and the telescopic shape change requirement, and each surface of the regular tetrahedron is similar to a triangle and can bear larger external pressure due to the stability of the triangle; the application range of the regular tetrahedron-like telescopic variable structure is greatly expanded.

Drawings

FIG. 1 is a schematic diagram of the construction of the triangle in one embodiment of the present invention;

FIG. 2 is a schematic view of the structure of the kink connector in an embodiment of the invention;

FIG. 3 is a schematic formal structure diagram of one of the variable facets of one embodiment of the present invention;

FIG. 4 is a schematic formal structure diagram of one of the variable facets of one embodiment of the present invention;

FIG. 5 is a schematic formal structure diagram of one of the variable facets of one embodiment of the present invention;

FIG. 6 is a schematic formal structure diagram of one of the variable facets of one embodiment of the present invention;

FIG. 7 is a schematic structural view of an embodiment of the present invention in a collapsed state;

FIG. 8 is a schematic structural view of an embodiment of the present invention in an expanded state;

FIG. 9 is a schematic structural view from another perspective of the embodiment of FIG. 8 in an expanded state;

FIG. 10 is a schematic structural view of an embodiment of the present invention in an expanded state;

fig. 11 is a schematic diagram of another perspective of the embodiment of fig. 10 in an expanded state.

Wherein: the variable display surface 100, the triangle 110, the surface area pivot part 111, the adjacent group pivot part 112, the first edge pivot part 113, the two pivot parts 114, the triangle group 120, and the bending connecting piece 130.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1-11, a regular tetrahedron-like telescopic variable structure is characterized by comprising 4 variable expansion surfaces 100 and a plurality of connectors, wherein the 4 variable expansion surfaces 100 are connected and spliced by the connectors to form a regular tetrahedron-like; the variable expansion surface 100 consists of 3 triangular groups 120; the triangle set 120 includes two triangles 110.

Specifically, the triangular piece 110 is an isosceles triangle, and a surface area pivoting part 111 is arranged in any vertex of the middle part, the bottom edge and the bottom of the isosceles triangle; two vertexes of the bottom edge of the isosceles triangle are provided with second pivoting parts; and the surface area pivot joint 111 part positioned at a certain vertex of the bottom of the isosceles triangle is superposed with the second pivot joint part arranged at the position; the two triangular pieces 110 in the triangular group 120 are stacked in an aligned manner through the two plane-area pivoting parts 111, and a connecting piece is arranged in each plane-area pivoting part 111, so that the two triangular pieces 110 in the triangular group 120 can rotate around the plane-area pivoting parts 111 in a parallel manner; in the rotating process of the two triangular pieces 110, the second pivoting part close to the adjacent triangular group 120 is an adjacent group pivoting part 112, and the second pivoting part located at the outer periphery of the variable stretching surface 100 is an edge pivoting part 113; in the 3 triangular groups 120, the adjacent group pivoting parts 112 between the three triangular groups are sequentially aligned and hinged through a connecting piece, so that the 3 triangular groups 120 in the variable expansion surface 100 form a closed annular or triangular-like surface; two opposite edge upper pivoting parts 113 on the same edge between two adjacent variable expansion surfaces 100 are hinged in pairs through bent connecting pieces; so that 4 of the variable facets 100 are spliced into a regular tetrahedron-like shape.

Specifically, as shown in fig. 1, the adjacent group of pivoting portions 112 are circular holes or circular ring structures disposed on the triangular piece 110, and the two adjacent group of pivoting portions 112 are hinged by a pivot pin; the above-mentioned pivoting parts 113 are circular holes or circular ring structures arranged at the top of the bottom side of the triangular piece 110, and the two above-mentioned pivoting parts 113 are hinged by a bending connector 130; as shown in fig. 2, the bending connector 130 is in a V shape, an included angle between two opposite bending sides is 70.53 degrees, that is, the included angle is approximately equal to the value of arccos (1/3), and both the two opposite bending sides are provided with a rotary connecting hole; and a rotating shaft pin is arranged in the rotating connecting hole.

Preferably, as shown in fig. 1, the vertex angle degree of the triangular element 110 is 120 degrees, and the triangular element 110 is an isosceles triangle frame or an isosceles triangle plate; when the telescopic bracket is an isosceles triangle frame, the structure is light, the telescopic bracket can be applied to the internal structure of a product needing telescopic change for supporting, the size and the mass are smaller due to contraction, and the telescopic bracket is convenient to carry and install; when for the triangle-shaped board, the pattern on the accessible design face enriches the style of flexible varistructure, satisfies people and examines pleasing to the eye different requirements, when being applied to children's intelligence development toy, and is interesting strong, helps children's intelligence development, and help children diverge the thinking, and the space third dimension is strong and safe use, and is not fragile, can also be applied to from the inside expansion stamping forming product of mould, because positive tetrahedron has the bigger concertina ratio, consequently can adapt to the processing demand of rapid expansion punching press and quick response.

In order to save the difficulty related to manufacturing and installation, the arrangement position of the face area pivoting part 111 preferably adopts the following four specific schemes: the geometric center of the inner triangular area of the triangular piece 110 shown in fig. 1, 8 and 9 is provided with the plane pivoting part 111; or as shown in fig. 2, 10 and 11, the central position of the bottom edge of the triangle 110 is provided with the plane area pivoting part 111; or as shown in fig. 3, the area between the center of the bottom edge of the triangle 110 and the top of the bottom edge is provided with the surface area pivoting part 111; or as shown in fig. 4, the surface area pivoting part 111 of the triangular piece 110 is overlapped with the adjacent group pivoting part 112. The four sides are various in flexible selection and installation modes, and the corresponding expansion deformation proportion and the specific parameter realization of the surface structure shape are also various; can be more suitable for different industrial application scenes; in the above four preferred real-time schemes, the regular tetrahedron structure shown in fig. 7 is formed after the complete contraction of the constituent regular tetrahedron.

Preferably, a deformation driving device for controlling the deformation of the telescopic variable structure is arranged, and the deformation driving device is arranged in the telescopic variable structure; the deformation driving device is an air cylinder pushing device which realizes the expansion and the furling of the telescopic variable structure by changing the position of any one or more of the pivoting parts 113 on the edges. The cylinder pushing device can be arranged on the bending connecting piece 130 or the triangle 110 according to different requirements of operation.

Preferably, the deformation driving device is a motor rotating device, and the motor rotating device realizes the expansion and the furling of the telescopic variable structure by changing the relative positions of two triangular pieces 110 in any one or more groups of the triangular groups 120; the motor rotating device is arranged at the middle pivoting part of any group of the triangular pieces 110, the motor body is arranged on one triangular piece 110 in the group of the triangular pieces 110, and the motor spindle is connected with the other triangular piece 110 in the group of the triangular pieces 110. The rotation of the motor can be accurately controlled by the control device, the whole telescopic variable structure is controlled by specific numerical values, and the degree of telescopic change of the telescopic variable structure is more accurately controlled by combining a surface vertical installation method of the telescopic variable structure, so that the motor is suitable for different occasions.

The invention provides a regular tetrahedron-like telescopic variable structure, compared with the prior art, a regular tetrahedron structure formed by 100 surrounding groups of 4 variable expansion surfaces can realize the expansion or folding change of the whole structure of the regular tetrahedron-like structure by changing the position of a pin joint part 113 on any edge of the regular tetrahedron, the whole size is smaller, the whole structure is more compact, the size reduction of the regular tetrahedron-like structure is easy to realize, the expansion structure has a larger telescopic change space which is about 1.2-3.5 of the volume of the contraction structure, and the regular tetrahedron can realize the support and telescopic change of the taper compared with a cube; in addition, the hinged position of the triangular piece 110 in each triangular group 120 in the regular tetrahedron can be freely selected according to the actual application requirement and the requirement of the change of the telescopic shape, and each surface of the regular tetrahedron is similar to a triangle due to the stability of the triangle, so that the regular tetrahedron can bear larger external pressure; the size reduction of the regular tetrahedron-like structure is easy to realize, and the whole structure is simple and compact; the method can be used in the deformation geometry truss structure in the fields of toy, building, bridge, spaceflight and the like, the four sides have the taper extension and the special stability of the triangle, and the method can be suitable for different fields; the telescopic variable structure can be applied to decorations needing structural size change, can be arranged in materials with tensile property to be unfolded, can provide good supporting and unfolding functions, and greatly expands the application range of the regular tetrahedron-like telescopic variable structure.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. A kind of regular tetrahedron's flexible variable structure, characterized by, including 4 variable expansion surfaces and multiple link, 4 said variable expansion surfaces connect splice into a kind of regular tetrahedron by the said link;

the variable expansion surface consists of 3 triangular groups; the triangle group comprises two triangle pieces;

the triangular piece is an isosceles triangle, and the middle part or the bottom edge of the isosceles triangle is provided with a surface area pivoting part; two vertexes of the bottom edge of the isosceles triangle are provided with second pivoting parts; the two triangular pieces in the triangular group are overlapped to be arranged and are aligned through the two face area pivoting parts, and connecting pieces are arranged in the face area pivoting parts, so that the two triangular pieces in the triangular group can rotate around the face area pivoting parts in parallel; in the rotating process of the two triangular pieces, a second pivoting part close to an adjacent triangular group is an adjacent group pivoting part, and a second pivoting part located at the periphery of the variable expansion surface is an on-edge pivoting part;

in the 3 triangular groups, adjacent group pivoting parts between the three triangular groups are sequentially aligned and hinged through a connecting piece, so that the 3 triangular groups in the variable expansion surface form a closed annular or triangular-like surface; two adjacent variable expansion surfaces are hinged with each other through a bending connecting piece, and the two upper pivoting parts of the edges, which are positioned on the same edge and are opposite to each other, are hinged with each other; so that 4 variable expansion surfaces are spliced into a regular tetrahedron.

2. A flexible variable structure like a regular tetrahedron according to claim 1, wherein the adjacent groups of pivoting portions are round holes or circular ring structures arranged on the triangular member, and two adjacent groups of pivoting portions are hinged by a pivot pin.

3. A flexible variable structure like a regular tetrahedron according to claim 1, wherein the upper edge pivot joint part is a circular hole or a ring structure arranged at the vertex of the bottom edge of the triangular piece, and the two upper edge pivot joint parts are hinged by a bending connecting piece; the bending connecting piece is in a V shape, the included angle of two opposite bending edges is 70.53 degrees, and the two opposite bending edges are both provided with a rotating connecting hole; and a rotating shaft pin is arranged in the rotating connecting hole.

4. A tetrahedron of the kind described in claim 1, wherein the apex angle of the triangular elements is 120 degrees, and the triangular elements are isosceles triangular frames or plates.

5. A tetrahedron-like telescopic variable structure of claim 1 or 4 wherein the face pivot is provided at the geometric center of the inner triangular region of the triangular member.

6. A tetrahedron-like telescopic variable structure according to claim 1 or 4, wherein the face area pivot joint is provided at a central position of the bottom side of the triangular piece.

7. A tetrahedron of claim 1 or 4 wherein the area between the center of the base of the triangle and the apex of the base is provided with the face pivot.

8. A tetrahedron-like telescopic variable structure of claim 1 or 4 wherein the face domain pivots of the triangle coincide with the adjacent set of pivots.

9. A regular tetrahedron-like telescopic variable structure according to claim 1, wherein a deformation driving device is provided for controlling the deformation of the telescopic variable structure, and the deformation driving device is installed inside the telescopic variable structure; the deformation driving device is an air cylinder pushing device, and the air cylinder pushing device realizes the expansion and the furling of the telescopic variable structure by changing the position of any one or more pivoting parts on the edges.

10. A regular tetrahedron-like telescopic variable structure of claim 9, wherein the shape-changing driving device is a motor rotating device, and the motor rotating device realizes the expansion and contraction of the telescopic variable structure by changing the relative positions of two triangular parts in any one or more groups of the triangular groups; the motor rotating device is arranged at the middle position pivoting part of any one group of the triangular pieces, the motor body is arranged on one of the triangular pieces, and the motor spindle is connected with the other triangular piece of the group of the triangular pieces.

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