Attachment structure having a connection member with multiple attachment features
The present aspects include an adhesive and mechanically bonded adapter or node. The adapter or node comprises a connection member, including: an outer wall extending in a first direction from a first proximal end to a first distal end; an inner wall extending within the outer wall, in the first direction, from a second proximal end to a second distal end; and a base wall extending from an inner surface of the outer wall to an outer surface of the inner wall between the first proximal end and the second proximal end; and wherein the outer wall, the inner wall, and the base wall define a space having a distance between the outer wall and the inner wall that varies in the first direction, wherein the space is configured to fixedly position an end portion of a tube inserted into the space such that the end portion is fixed to the inner surface of the outer wall and the outer surface of the inner wall.
1. A structure comprising:
a connection member, including:
an outer wall extending in a first direction from a first proximal end to a first distal end;
an inner wall extending within the outer wall, in the first direction, from a second proximal end to a second distal end; and
a base wall extending from, and connecting, an inner surface of the outer wall to an outer surface of the inner wall between the first proximal end and the second proximal end; and
wherein the outer wall, the inner wall, and the base wall define a space having a distance between the outer wall and the inner wall that varies in the first direction, wherein the space is configured to fixedly position an end portion of a tube inserted into the space such that the end portion is fixed to the inner surface of the outer wall and the outer surface of the inner wall.
2. The structure of claim 1 , wherein the outer surface of the inner wall includes an engagement feature configured to increase a resistance to removal of the tube from the space after being inserted into the space.
3. The structure of claim 2 , wherein the engagement feature comprises at least a first threaded surface, a rough surface, protrusions that dig into the tube, concentric rings, barbs, or hooks.
4. The structure of claim 3 , further comprising:
the tube inserted into the space, wherein an inner surface of the tube comprises a second threaded surface corresponding to the first threaded surface.
5. The structure of claim of claim 4 , wherein the second threaded surface is at least pre-threaded before the insertion of the tube into the space or formed by the first threaded surface when the tube is inserted into the space.
6. The structure of claim 1 , wherein the inner surface of the outer wall includes an engagement feature configured to increase a resistance to removal of the tube from the space after being inserted into the space.
7. The structure of claim 1 , further comprising:
the tube inserted into the space; and
an adhesive that at least adheres the inner surface of the outer wall to an outer surface of the tube or adheres the outer surface of the inner wall to an inner surface of the tube.
8. The structure of claim 1 , wherein the distance between the outer wall and the inner wall increases in the first direction.
9. The structure of claim 1 , wherein a diameter of the outer surface of the inner wall of the connection member decreases in the first direction.
10. The structure of claim 1 , wherein the inner surface of the outer wall of the connection member has a constant diameter in the first direction.
11. The structure of claim 1 , wherein a diameter of the inner surface of the outer wall of the connection member increases in the first direction.
12. The structure of claim 1 , wherein an inner diameter of an inner surface of the inner wall of the connection member decreases or remains constant in the first direction.
13. The structure of claim 1 , wherein the outer surface of the inner wall of the connection member decreases in diameter in the first direction and the inner surface of the outer wall of the connection member has a constant diameter in the first direction.
14. The structure of claim 1 , wherein the connection member is configured to form a gap between an end surface of the end portion of the tube and the base wall when the tube is inserted into the space, and further configured to include an adhesive in the gap to adhere the tube to the connection member.
15. The structure of claim 1 , wherein the outer wall has a first longitudinal length in the first direction, wherein the inner wall has a second longitudinal length in the first direction, and wherein the first longitudinal length is greater than the second longitudinal length.
16. The structure of claim 1 , wherein the connection member further comprises a base member, wherein the outer wall and the inner wall extend from the base member.
17. The structure of claim 16 , wherein the base member includes an internal wall defining a chamber, and wherein the inner wall includes an inner surface defining an open proximal end that communicates with the chamber.
18. The structure of claim 1 , wherein the connection member is 3-D printed.