CN113027898A

CN113027898A - Node connecting piece and node connecting assembly

Info

Publication number: CN113027898A
Application number: CN201911249923.XA
Authority: CN
Inventors: 何天斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2021-06-25

Abstract

The application discloses node connecting piece and node coupling assembling thereof, a node connecting piece includes: the device comprises a first annular piece (11), wherein at least one first radial arm (12) is arranged on the outer peripheral surface of the first annular piece (11), and the inner peripheral surface of the first annular piece (11) is used for forming a rotating pair and is provided with a first limiting structure. Another nodal connection, comprising: the second ring-shaped part (21) is provided with at least one second radial arm (22) on the outer peripheral surface of the second ring-shaped part (21), an extension column (23) for forming a revolute pair is arranged on the inner peripheral surface of the second ring-shaped part (21), and the extension column (23) is provided with a second limiting structure. The node connecting assembly comprises the two node connecting pieces, and a rotating pair is formed between the two node connecting pieces. According to the technical scheme of this application, form the revolute pair through the cooperation between the node connecting piece, consequently obtain good application flexibility.

Description

Node connecting piece and node connecting assembly

Technical Field

The present application relates to the field of mechanical components, and more particularly, to a node connection member and a node connection assembly including the same.

Background

The connection of mechanical components is used in a wide variety of applications, for example in the connection of trusses, in the construction of building blocks, and the like. Since reliable connection between different members in a three-dimensional space is required at a node point, a connector fitting with different members is usually designed at the node point.

Conventional joint connectors are typically pre-designed according to the installation requirements at the joint and are manufactured and then used in the actual assembly process. Thus, in general, different nodal connections are required for different three-dimensional connection regimes. When the connection working condition changes, the node connecting piece is difficult to be applied due to poor application flexibility.

In view of this, how to provide a node connection solution with better flexibility becomes a technical problem to be solved in the field.

Disclosure of Invention

In view of the above, the present application provides a node connection technical solution to obtain good application flexibility, so that the node connection technical solution can be widely applied to nodes connected by various mechanical members.

According to the present application, there is provided a node connecting member comprising: the first ring-shaped piece is provided with at least one first radial arm on the outer peripheral surface, and the inner peripheral surface of the first ring-shaped piece is used for forming a revolute pair and is provided with a first limiting structure.

Preferably, the ends of said first radial arms are closed; or the end of the first radial arm is provided with a hole structure.

Preferably, the longitudinal extension of the first radial arm is perpendicular to the axial direction of the first annular element; or the line of longitudinal extension of the first radial arm is coplanar with the central axis of the first annulus; or the longitudinal extension line of the first radial arm is out of plane with the central axis of the first ring-shaped member.

Preferably, the first limit structure includes: the first axial limiting structure is used for limiting the position of the first annular piece in the axial direction in the mounting state.

Preferably, the first axial limiting structure comprises an inner circumferential flange disposed on an inner circumferential surface of the first ring member adjacent the first end of the first ring member.

Preferably, the inner peripheral flange is provided continuously in the circumferential direction on the inner peripheral surface of the first ring member.

Preferably, the first limit structure includes: a first circumferential stop structure adjacent the second end of the first ring member for adjustably limiting the position of the first ring member in the circumferential direction in the installed condition.

Preferably, the first circumferential limiting structure comprises: a plurality of first limiting grooves which are uniformly distributed on the inner circumferential surface of the first annular member at intervals and extend along the axial direction; or at least one first limiting column, which extends along the axial direction and is fixedly arranged on the inner circumferential surface of the first annular member and protrudes inwards in the radial direction.

According to another aspect of the present application, there is provided a node connector comprising: the outer circumferential surface of the second ring-shaped piece is provided with at least one second radial arm, the inner circumferential surface of the second ring-shaped piece is provided with an extension column used for forming a revolute pair, and the extension column is provided with a second limiting structure.

Preferably, the ends of said second radial arms are closed; or the end of the second radial arm is provided with a hole structure.

Preferably, the longitudinal extension of the second radial arm is perpendicular to the axial direction of the second annular element; or the longitudinal extension of the second radial arm is coplanar with the central axis of the second annulus; or the longitudinal extension line of the second radial arm is out of plane with the central axis of the second ring-shaped member.

Preferably, the extension column comprises: a connecting portion fixedly connected to an inner circumferential surface of the second ring member; and a columnar portion extending from the connecting portion in the axial direction and beyond an end surface of the first end portion of the second ring member, at least a part of an outer side surface of the columnar portion being provided as at least a part of an outer peripheral surface for forming a revolute pair.

Preferably, the columnar portion includes a plurality of columnar portions arranged at intervals from each other, each of the columnar portions having an arc-shaped surface for forming an outer peripheral surface of the revolute pair.

Preferably, the cross-sectional shape of the columnar portion is a sector; and/or the height of the plurality of columnar portions above the end surface of the first end portion of the second annular member may be uniform or nonuniform.

Preferably, the extension column has a connection hole structure opened at least in an axial direction.

Preferably, the second limit structure of the extension column comprises: and the second axial limiting structure is arranged on the end surface of the columnar part.

Preferably, the second axial stop formation comprises a stop flange projecting radially outwardly at the end of the cylindrical portion.

Preferably, the second limit structure of the extension column comprises: a second circumferential limiting structure for adjustably limiting a position of the second ring member in the circumferential direction in the mounted state.

Preferably, the second circumferential limiting structure comprises: at least one second limit column, which extends along the axial direction and is fixedly arranged on the connecting part and protrudes outwards in the radial direction beyond the outer peripheral surface; or a plurality of second limiting grooves which are uniformly distributed on the outer peripheral surface of the columnar part at intervals and extend along the axial direction.

Preferably, the connector comprises an axial arm connected to the second end of the second annular member and extending in an axial direction opposite the extension post.

Preferably, the ends of the axial arms are closed; or the end of the axial arm is provided with a hole structure.

According to a further aspect of the present application, there is provided a node connecting assembly, wherein the node connecting assembly comprises at least one first ring member and at least one second ring member of the above node connecting member, and the extending column of one of the second ring members is fitted into the corresponding one of the first ring members, thereby forming a revolute pair between the extending column and the inner circumferential surface of the first ring member.

Preferably, the first annular element and the second annular element fitted to each other have only a rotational degree of freedom of relative rotation about the central axis and no degree of freedom of relative translation in the axial direction by means of the first limit structure and the second limit structure.

Preferably, the first ring member and the second ring member fitted to each other have a plurality of restricting positions switchably around the central axis, and an angular difference between any two adjacent restricting positions in the circumferential direction is 10 degrees to 180 degrees.

Preferably, the first and second ring members fitted to each other have the same outer diameter.

Preferably, the node connecting assembly comprises a plurality of pairs of the first ring-shaped member and the second ring-shaped member assembled with each other, and at least one rod-shaped member is connected between the pairs of the first ring-shaped member and the second ring-shaped member assembled with each other through the respective first radial arm and/or second radial arm.

Different with the relatively poor node connecting piece of traditional flexibility, in the technical scheme of this application, node connection subassembly includes split type node connecting piece to form the revolute pair through the cooperation between the node connecting piece, therefore same node connecting piece or node connection subassembly can be applicable to in the application operating mode of difference, thereby obtain good application flexibility.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate an embodiment of the invention and, together with the description, serve to explain the invention. In the drawings:

fig. 1 and 2 are schematic views of a node connection according to a preferred embodiment of the present application.

Fig. 3 and 4 are schematic views of a node connection according to another preferred embodiment of the present application.

Fig. 5 and 6 are schematic views showing the assembled state of the two node connecting members.

Fig. 7 is a sectional view showing the assembled state of the above-described two node connectors.

FIG. 8 is a schematic view of a nodal connection assembly including a plurality of nodal connections.

Fig. 9 is a schematic view of a connecting rod connected to the node connecting assembly.

Fig. 10-21 are schematic diagrams of node-connecting assemblies according to various embodiments of the present application.

Detailed Description

The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Definition of terms

In the present application:

by "node" is generally meant a connection point when mechanical members are connected to each other, such as a mechanical truss structure, a frame structure, a connection point when building blocks, etc.

The so-called "axial" is generally the bi-directional direction of the central axis of rotation for a ring.

By "radial" is meant generally perpendicular to the "axial" direction, and in particular to the radial or diametrical direction of the annular member.

The terms "first" and "second" are used for distinguishing between similar features or elements or structures and are not intended to be limiting, and in some cases, the terms "first" or "second" may be used interchangeably.

The terms "inner" and "outer" are generally used with reference to the annulus as the basis, inwardly toward the inside of the annulus and outwardly toward the outside of the annulus.

In the technical scheme of this application, provide two kinds of nodal connection spares and include nodal connection subassembly of these two kinds of nodal connection spares. The first type of nodal connection is described in detail below with reference to fig. 1 and 2.

First node connecting piece

As shown in fig. 1 and 2, according to one embodiment of the present application, the node connecting member provided by the present application includes a first ring member 11, at least one first radial arm 12 is disposed on an outer circumferential surface of the first ring member 11, and an inner circumferential surface of the first ring member 11 is configured to form a revolute pair and is provided with a first limiting structure.

The first annular member 11 and its attendant structural features form the major part of the node connection. The first annular element 11 is annular in body and comprises at least one first radial arm 12 arranged on the outer peripheral surface and a first stop structure arranged on the inner peripheral surface, which first stop structure will be described in detail below.

In the first ring member 11 as the node connecting member, the inner circumferential surface thereof is used to form a rotating pair, so that after the installation and assembly are completed, the first ring member 11 can rotate by the rotating pair formed on the inner circumferential surface thereof, thereby flexibly adjusting the pointing direction of the first radial arm 12, and thus obtaining good flexibility for application to different connection conditions.

The number of first radial arms 12 is at least one and the number or other parameters may be selected according to the particular application. For example, two or more may be used. The first radial arm 12 may extend in a radial direction or a diameter direction of the first ring 11, or may extend in a direction perpendicular to a central axis of the first ring 11 but not intersecting the central axis. Thus, the longitudinal extension of the first radial arm may be perpendicular to the axial direction of the first ring; or the line of longitudinal extension of the first radial arm is coplanar with the central axis of the first annulus; or the longitudinal extension line of the first radial arm is out of plane with the central axis of the first ring-shaped member. By "longitudinally extending line" is herein understood a longitudinally extending centre line of the first radial arm.

The first radial arm 12 is generally intended to be connected to other members, for example to other rods. To this end, the ends of the first radial arms 12 may be closed for insertion into other components; or the end of said first radial arm 12 is provided with a hole structure to allow the insertion of other components into the first radial arm 12. Through the connection with other components, a mechanical connection structure, such as a truss structure or a building block shape, can be formed in the three-dimensional space.

In order to limit the first ring member to a reliable position in the assembled state, as described above, the first stopper structure is provided on the inner circumferential surface. In order to limit the position of the first ring member 11 in the axial direction, the first limiting structure comprises a first axial limiting structure for limiting the position of the first ring member 11 in the axial direction in the mounted state. That is, the first ring member 11 is immovable in its axial direction after installation and assembly.

The first limiting structure may be implemented in various ways, for example, a limiting column, a protrusion, etc. for implementing axial limiting may be provided on a component that cooperates with the first ring member 11. It may also be provided on the first annular element 11 itself. Preferably, as shown in fig. 1 and 2, the first axial limiting structure includes an inner circumferential flange 13, and the inner circumferential flange 13 is disposed on the inner circumferential surface of the first annular member 11 and is adjacent to the first end 111 of the first annular member 11. The inner peripheral flange 13 may be distributed on a part of the inner periphery of the first ring member 11 (i.e., the inner peripheral flange 13 is provided discontinuously), but preferably, the inner peripheral flange 13 is provided continuously on the inner peripheral surface of the first ring member 11 in the circumferential direction.

The inner peripheral flange 13 protrudes inward in the radial direction, so that when the first ring member 11 is fitted to other members, the first ring member 11 can be held in a predetermined position by the stopper action of the inner peripheral flange 13, preventing it from coming off from the other members in the axial direction.

In order to make the revolute pair have a predetermined rotation range and/or a predetermined limit position in the circumferential direction, preferably, as shown in fig. 2, the first limit structure includes: a first circumferential stop structure adjacent the second end 112 of the first ring member 11 for adjustably limiting the position of the first ring member 11 in the circumferential direction in the installed condition.

After the installation and assembly are completed, the first ring member 11 has a degree of freedom of rotation about its central axis, and in order to meet the requirements of the connection condition, the rotational angle range or rotational position of the first ring member 11 needs to be limited. In particular, the first circumferential limiting structure does not completely fix the first ring-shaped member, but rather keeps the first ring-shaped member adjustably and controllably rotatable. This can be achieved in a number of ways. For example, a limit projection, a stopper, or the like may be provided on another component that is engaged with the first ring member 11 so as to be able to break through or pass over.

Preferably, as shown in fig. 2, the first circumferential limiting structure includes: a plurality of first stopper grooves 14, the plurality of stopper grooves 14 being uniformly distributed on the inner circumferential surface of the first ring member 11 at intervals and each extending in the axial direction. In this embodiment, the first ring member may be provided with a stopper post or a stopper protrusion on another member engaged with the first ring member, so that when the stopper post falls into one of the stopper grooves 14, the first ring member is held in the stopper position corresponding to the stopper groove. Further, when the first ring member 11 is rotated again, it may be disengaged from the original spacing groove and dropped into a new spacing groove, thereby allowing the first ring member to change its rotational orientation.

Furthermore, according to another mode, the first circumferential limiting structure may include the at least one first limiting post (not shown) that extends in the axial direction and is fixedly disposed on the inner circumferential surface of the first ring member 11 and protrudes inward in the radial direction. In this embodiment, a plurality of spacing grooves (similar to the spacing grooves 14 shown in fig. 2) may be provided in other parts that engage the first ring member, thereby allowing the spacing posts in this embodiment to engage the plurality of spacing grooves, and also allowing the first ring member to adjustably and controllably rotate.

The first ring member may be made of a plastic material or a metal material, and the elastic deformability of the material of the first ring member may be utilized during assembly and adjustment of the rotational position of the first ring member. For example, the elastic deformation of the limiting column can be used for realizing the matching conversion of the limiting column and different limiting grooves.

Second type node connecting piece

As shown in fig. 3 and 4, according to another preferred embodiment of the present application, there is provided another node connecting member including: the second ring-shaped part 21 is provided with at least one second radial arm 22 on the outer peripheral surface, the inner peripheral surface of the second ring-shaped part 21 is provided with an extending column 23 for forming a revolute pair, and the extending column 23 has a second limiting structure.

As shown in fig. 3 and 4, the second ring member 21 includes at least one second radial arm 22 disposed on an outer circumferential surface thereof and an extension column 23 connected to an inner circumferential surface thereof, and the extension column 23 may form a rotation pair by being engaged with an inner circumferential surface of the first ring member 11. Similarly, in order to secure the second ring member 21 in the assembled position, the second ring member 21 further includes a second limiting structure formed on the extending column 23.

The arrangement of the second radial arm 22 is similar to the arrangement of the first radial arm 21 described above. For example, the second radial arm 22 ends closed for inserting other components to be connected; or the end of said second radial arm 22 is provided with a hole structure to allow the insertion of other parts to be connected into the radial arm. As another example, the longitudinal extension of the second radial arms 22 is perpendicular to the axial direction of the second annular element 21; or the longitudinal extension of the second radial arm 22 is coplanar with the central axis of the second annular member 21; or the longitudinal extension of the second radial arm 22 is coplanar with the central axis of the second annular element 21. As for the arrangement of the second radial arm 22, reference may be made to the arrangement of the first radial arm 21 described above, and therefore, the second radial arm 22 will not be described in detail here.

The arrangement of the extending column 23 is described in detail below. As described above, the extension column 23 may form a revolute pair by cooperation with the inner circumferential surface of the first ring member 11, and thus the relative rotational position between the first ring member and the second ring member may be flexibly adjusted or selected.

Preferably, as shown in fig. 3, the extension column 23 includes: a connecting portion 231, the connecting portion 231 being fixedly connected to an inner peripheral surface of the second ring member 21; and a columnar portion 232, the columnar portion 232 extending from the connecting portion 231 in the axial direction and beyond an end surface of the first end portion 211 of the second ring 21, at least a part of an outer side surface of the columnar portion 232 being provided as at least a part of an outer peripheral surface 2321 for forming a rotation pair.

In this structure, the connection portion 231 is fixedly connected to the inner circumferential surface of the second ring as a base for attaching the extension column 23. The connecting portion 231 may be distributed in the entire cross-sectional area of the inner circumferential surface, or may be distributed in a partial cross-sectional area of the inner circumferential surface in order to satisfy the requirement of fixed connection, thereby achieving the effects of reducing material and weight. Generally, the connecting portion 231 is connected to the inner circumferential surface of the second ring member at a plurality of positions, so that it is possible to provide a stable support to the extending column 23.

The columnar portion 232 extends in the axial direction beyond the first end face 211 of the second ring member 21 on the basis of the connecting portion 231 to enable a fitting relationship with the inner peripheral surface of the first ring member. Meanwhile, at least a part of the outer side surface of the columnar portion 232 is provided as at least a part of the outer peripheral surface 2321 for forming a revolute pair. For example, the column portion 232 may be a single cylindrical shape, the outer peripheral surface of which is entirely used to form a revolute pair. As a preferred embodiment, the column portion 232 may be a circumferentially segmented structure, as shown in fig. 3. Specifically, the column portion 232 includes a plurality of column portions arranged at intervals from each other, each having an arc-shaped surface for forming the outer circumferential surface 2321 of the revolute pair. In the embodiment shown in fig. 3, there are a plurality of column portions 232, and the outer side surface of each column portion 232 is formed as an arc surface, and the arc surfaces are located in the same outer circumferential surface 2321 and are used for cooperating with the inner circumferential surface of the first ring member 11 to form a rotating pair. Although in the form shown in fig. 3 there are two posts 232, it will be appreciated that more posts, such as 3-6, may be provided. By providing the columnar portion 232 of a sectional structure, elastic deformation of the columnar portion 232 can be facilitated, thereby facilitating assembly with the first ring member. In the structural form of the columnar portion 232 of the sectional structure, it is preferable that the cross-sectional shape of each columnar portion is a sector; and/or the height of the plurality of columnar portions above the end surface of the first end portion 211 of the second annular member 21 may be uniform or nonuniform.

As described above, the outer side surface of the extending column 23 is used to form a revolute pair with the inner circumferential surface of the first ring member. Preferably, as shown in fig. 3, the extension column 23 has a connection hole structure 233 opened at least in the axial direction. By means of the connection hole structure 233, it is possible to provide a plugging position for other connecting elements or radial arms of the first ring member. Further preferably, the connection hole structure 233 may be provided with a releasable locking mechanism, such as a stopper pin, a claw, or the like.

As shown in fig. 4, the second annular member as the second type of node connection may preferably have an axial arm 25, the axial arm 25 being connected to the second end 212 of the second annular member 21 and extending in an axial direction opposite to the extension column 23. The axial arm 25 offers the possibility of more connection means. Preferably, the ends of the axial arms 25 are closed; or the ends of the axial arms 25 are provided with a hole structure. Preferably, the axial arms 25 extend in the direction of the central axis of the second annular element.

In order to maintain the second annular member in a reliable position after assembly, as shown in fig. 3 and 4, the second limit structure of the extension column 23 includes: a second axial limiting structure and/or a second circumferential limiting structure, wherein the second axial limiting structure is arranged on the end surface of the columnar part 232; the second circumferential stop structure serves to adjustably limit the position of the second annular element 21 in the circumferential direction in the mounted state, in other words to be able to adjustably maintain the relative rotational position between the two annular elements in cooperation with the first annular element.

The second axial stop formation may take a variety of forms to cooperate with the first axial stop formation of the first annular element, for example as a stop lug, stop abutment or the like. Preferably, as shown in fig. 3, the second axial stop structure includes a stop flange 2322 projecting radially outwardly at the distal end of the cylindrical portion 232. Therefore, when the extension column 23 is inserted into the first ring member, the stop flange 2322 of the column portion 232 passes over the inner peripheral flange 13, so that the first ring member and the second ring member have a certain relative position in the axial direction by the fitting relationship between the inner peripheral flange 13 and the stop flange 2322. At the same time, the limiting function of the end face of the second annular member may be added, so that the first annular member is limited in the space between the limiting flange 2322 of the second annular member and the end face thereof. Although described above in terms of a mating relationship between the position-defining flange and the inner peripheral flange, it will be appreciated by those skilled in the art that other implementations of axial position-defining between the first annular member and the second annular member are possible and are within the scope of the present application.

In the circumferential direction, preferably, the second circumferential limiting structure may include: at least one second stopper post 24 extending in the axial direction and fixedly disposed on the connecting portion 231 and protruding outward in the radial direction beyond the outer circumferential surface 2321. In this configuration, when the extended posts 23 of the second ring member are inserted into the first ring member, they have a relatively fixed position in the axial direction, while in the circumferential direction, at least one second spacing post 24 is able to drop into the corresponding spacing slot 14 shown in fig. 2 and hold the two ring members in a relatively fixed rotational position. When the two parts rotate relatively, the second limiting column 24 can be separated from the original limiting groove 14 through elastic deformation and fall into the other limiting groove 14, so that the relative rotation position between the first annular part and the second annular part can be adjusted.

Alternatively, as described above, in the case where the first ring member has the stopper post, a plurality of second stopper grooves (not shown) may be provided in the connecting portion, and the plurality of second stopper grooves may be uniformly distributed on the outer circumferential surface 2321 of the columnar portion 232 at intervals and each extend in the axial direction. As can be seen from the above description of the two embodiments, a position-limiting groove may be provided on the first ring member, and a position-limiting post may be correspondingly provided on the second ring member (as shown in the embodiments of fig. 1 to 4); the first ring member may be provided with a stopper post and the second ring member may be provided with a stopper groove (not shown). Both embodiments are within the scope of the present application. As can be understood by those skilled in the art, a gap exists between the inner peripheral surface of the first ring-shaped member and the outer peripheral surface of the extending column of the second ring-shaped member, and the design of the limiting column satisfies that: the radius of the circle formed by the rotation locus in the circumferential direction is naturally larger than the radius of the outer peripheral surface cross-sectional circle of the extended column of the second ring member and is also slightly larger than the radius of the inner peripheral surface cross-sectional circle of the first ring member.

Node connecting assembly

As shown in fig. 5 to 9, the present application also provides a nodal connection assembly comprising at least one first ring segment 11 of the first type of nodal connection described above and at least one second ring segment 21 of the second type of nodal connection described above. That is, the first ring member 11 and the second ring member 21 may be assembled and connected to each other.

As shown in fig. 5, 6 and 7, a first ring member 11 and a second ring member 21 may be assembled together. Specifically, the extending column 23 of one second ring member 21 is inserted into a corresponding one of the first ring members 11, so that a revolute pair is formed between the extending column 23 and the inner circumferential surface of the first ring member 11. Alternatively, the plurality of first ring members 11 and the plurality of second ring members 21 may be assembled with each other, as shown in fig. 9. Therefore, according to different working requirements, the first radial arm, the second radial arm and/or the axial arm can be connected to the link member (as shown in fig. 8, only one connection node is schematically shown in the figure, and the connection node can be applied to other different connection nodes), or can be connected to the adjacent corresponding first ring member or second ring member. Thus, in the solution of the present application, after being assembled to each other, the first ring element 11 and the second ring element 21 have only a rotational degree of freedom of relative rotation about the central axis and no degree of freedom of relative translation in the axial direction by means of the first and second limiting structures. Through controllable rotatory position relation between first ring member and the second ring member, can realize very nimble cubical space connected mode or connection structure, this is the realization that this technical scheme of this application is flexible too. In addition, the node connecting assembly can lock the two annular parts through locking pins, welding, gluing and other modes after a space connecting mode is selected, and further the rotational freedom degree between the two annular parts is eliminated. Of course, according to different working conditions, the rotational freedom degree between the two can be reserved after the connection is completed.

When assembled with each other, the first annular member 11 and the second annular member 21 have a plurality of limit positions (corresponding to the positions of the limit grooves 14 in the preferred embodiment) between them, which are switchable around the central axis, and the angular difference between any two adjacent limit positions in the circumferential direction is 15 degrees to 60 degrees, preferably 15 degrees (corresponding to 24 limit grooves), 30 degrees (corresponding to 12 limit grooves), 45 degrees (corresponding to 8 limit grooves), or 60 degrees (corresponding to 6 limit grooves). Preferably, said first annular element 11 and second annular element 21, fitted to each other, have the same external diameter; and/or coaxially with each other.

As discussed above, the first radial arm, the second radial arm, and/or the axial arm may have a connecting rod or rod-like member 26 attached thereto, as shown in FIG. 9, to form a connecting node with at least one pair of first and second annular members. It will be appreciated that other connecting nodes may be formed using annuli of the same or different geometric parameters. In a mechanical mechanism, such as a truss mechanism, preferably annular members of the same parameters are used, so that good interchangeability is obtained. For example, as shown in fig. 10 to 21, the node connecting assembly according to the present application may have various combinations, and these variations are within the scope of the present application.

As can be seen from the above description, in the technical solution of the present application, the revolute pair is formed by the cooperation between the ring members as the node connecting members, and thus the same node connecting member or node connecting assembly can be applied to different application conditions, thereby achieving good application flexibility.

The preferred embodiments of the present application have been described in detail above, but the present application is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications all belong to the protection scope of the present application.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in the present application.

In addition, any combination of the various embodiments of the present application can be made, and the same should be considered as the disclosure of the present invention as long as the combination does not depart from the spirit of the present application.

Claims

1. A nodal connection, the nodal connection including: the device comprises a first annular piece (11), wherein at least one first radial arm (12) is arranged on the outer peripheral surface of the first annular piece (11), and the inner peripheral surface of the first annular piece (11) is used for forming a rotating pair and is provided with a first limiting structure.

2. The nodal connection according to claim 1, wherein the first radial arm (12) is closed at its extremity; or the end of the first radial arm (12) is provided with a hole structure; preferably, the longitudinal extension of the first radial arm (12) is perpendicular to the axial direction of the first annular element (11); or

The longitudinal extension of the first radial arm (12) is coplanar with the central axis of the first ring (11); or

The longitudinal extension of the first radial arm (12) is coplanar with the central axis of the first annular element (11).

3. The nodal connection of claim 1, wherein the first limit formation comprises: a first axial limiting structure for limiting the position of the first annular member (11) in the axial direction in a mounted state; preferably, the first axial limiting structure comprises an inner circumferential flange (13), and the inner circumferential flange (13) is arranged on the inner circumferential surface of the first annular member (11) and is adjacent to the first end part (111) of the first annular member (11); preferably, the inner peripheral flange (13) is continuously provided on the inner peripheral surface of the first ring member (11) in the circumferential direction.

4. The nodal connection of claim 1, wherein the first limit formation comprises: a first circumferential stop structure adjacent the second end (112) of the first ring member (11) for adjustably limiting the position of the first ring member (11) in the circumferential direction in the installed condition;

preferably, the first circumferential limiting structure comprises:

a plurality of first limiting grooves (14), wherein the plurality of limiting grooves (14) are uniformly distributed on the inner circumferential surface of the first annular member (11) at intervals and extend along the axial direction; or

At least one first stopper post extending in the axial direction and fixedly provided on the inner peripheral surface of the first ring member (11) and protruding inward in the radial direction.

5. A nodal connection, the nodal connection including: the second ring-shaped part (21) is provided with at least one second radial arm (22) on the outer peripheral surface of the second ring-shaped part (21), an extension column (23) for forming a revolute pair is arranged on the inner peripheral surface of the second ring-shaped part (21), and the extension column (23) is provided with a second limiting structure.

6. The nodal connection according to claim 5, wherein the second radial arm (22) is closed at its extremity; or the end of the second radial arm (22) is provided with a hole structure;

preferably, the longitudinal extension of the second radial arms (22) is perpendicular to the axial direction of the second annular element (21); or

The longitudinal extension of the second radial arm (22) is coplanar with the central axis of the second ring (21); or

The longitudinal extension of the second radial arm (22) is coplanar with the central axis of the second annular element (21).

7. The nodal connection according to claim 5, wherein said extension column (23) comprises:

a connecting portion (231), the connecting portion (231) being fixedly connected to an inner peripheral surface of the second ring member (21); and

a columnar portion (232), the columnar portion (232) extending from the connecting portion (231) in the axial direction and beyond an end surface of the first end portion (211) of the second ring (21), at least a part of an outer side surface of the columnar portion (232) being provided as at least a part of an outer peripheral surface (2321) for forming a revolute pair.

8. The nodal connection according to claim 7, wherein the columnar portion (232) includes a plurality of columnar portions disposed at intervals from one another, each having an arcuate face for forming an outer peripheral surface (2321) of a revolute pair;

preferably, the cross-sectional shape of the columnar portion is a sector; and/or

The height of the plurality of columnar portions above the end face of the first end portion (211) of the second ring member (21) is uniform or nonuniform.

9. The nodal connection according to claim 5, wherein the extension column (23) has a connection hole structure (233) that is open at least in an axial direction.

10. The nodal connection of claim 7, wherein the second limit formation of the extension column (23) comprises: a second axial limiting structure arranged on the end surface of the columnar part (232);

preferably, the second axial stop structure comprises a stop flange (2322) projecting radially outwardly at the end of the cylindrical portion (232).

11. The nodal connection of claim 7, wherein the second limit formation of the extension column (23) comprises: a second circumferential limit structure for adjustably limiting a position of the second ring member (21) in the circumferential direction in the mounted state; preferably, the second circumferential limiting structure comprises:

at least one second stopper post (24) extending in an axial direction and fixedly provided on the connecting portion (231) and protruding outward in a radial direction beyond the outer peripheral surface (2321); or

The second limiting grooves are uniformly distributed on the outer peripheral surface (2321) of the columnar portion (232) at intervals and extend in the axial direction.

12. The joint of claim 5, wherein it comprises an axial arm (25), the axial arm (25) being connected to the second end (212) of the second annular element (21) and extending in an axial direction opposite to the extension column (23); preferably, the ends of the axial arms (25) are closed; or the end of the axial arm (25) is provided with a hole structure.

13. A nodal connection assembly, wherein the nodal connection assembly includes at least one first ring member (11) of a nodal connection as claimed in any one of claims 1 to 4 and at least one second ring member (21) of a nodal connection as claimed in any one of claims 5 to 12, the extension column (23) of one of the second ring members (21) being received within a corresponding one of the first ring members (11) so as to form a revolute pair between the extension column (23) and the inner circumferential surface of the first ring member (11).

14. A nodal connection assembly according to claim 13, wherein the first and second annular elements (11, 21) assembled to each other have only a rotational degree of freedom of relative rotation about a central axis and no degree of freedom of relative translation in an axial direction by means of said first and second limiting structures.

15. A nodal connection assembly according to claim 14, wherein the first and second ring members (11, 21) fitted to each other are convertibly provided with a plurality of limit positions about a central axis, the angular difference in circumferential direction between any two adjacent limit positions being between 10 and 180 degrees.

16. A nodal connection assembly according to claim 13, wherein said first and second annular members (11, 21) fitted to each other have the same external diameter;

preferably, the node connecting assembly comprises a plurality of pairs of first ring-shaped members (11) and second ring-shaped members (21) assembled with each other, and at least one rod-shaped member (26) is connected between the pairs of first ring-shaped members (11) and second ring-shaped members (21) assembled with each other through the respective first radial arms (12) and/or second radial arms (22).