US 7,320,392 B2 | ||
Shaft coupling unit | ||
Xingyun Xie, 1 Floor West 72 Building, Tong Zi Po, River West, Changsha City 410013 (China) | ||
Appl. No. 10/535,022 PCT Filed Nov. 10, 2003, PCT No. PCT/CN03/00945 § 371(c)(1), (2), (4) Date May 13, 2005, PCT Pub. No. WO2004/046576, PCT Pub. Date Jun. 03, 2004. |
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Claims priority of application No. 02 1 50200 (CN), filed on Nov. 16, 2002. | ||
Prior Publication US 2006/0049020 A1, Mar. 09, 2006 | ||
Int. Cl. F16D 13/56 (2006.01); F16D 19/00 (2006.01) |
U.S. Cl. 192—89.21 [188/166; 192/114 R] | 19 Claims |
1. A coupling device for a shaft, comprising:
a coupling disk coupled to an out-extending shaft;
a disk coupled to an external force member;
a first concave-convex assembly which is with the disk and has a first helicoid engaging surface;
a second concave-convex assembly which is engaged with the coupling disk and has a second helicoid engaging surface engaged
with the first helicoid engaging surface; and
a force generating source member provided between the coupling disk and the disk, wherein:
the first and second concave-convex assemblies are positioned to be pressed against and engaged with each other, and wherein
at least one of the first and second concave-convex assemblies is movable relative to the other to effect a rotational angular
displacement and an axial displacement relative to the other;
the first concave-convex assembly and the disk are positioned to be pressed against and engaged with each other, with at least
one of the first concave-convex assembly and the disk being movable relative to the other to effect a rotational sliding angular
displacement between the first concave-convex assembly and the disk;
an external force association member is positioned between the first concave-convex assembly and said external force member,
and the external force association member and the first concave-convex assembly are positioned to be pressed against and engaged
with each other in a radial direction, and wherein at least one of the external force association member and the first concave-convex
assembly is movable relative to the other to effect an axial sliding displacement between the external force association member
and the first concave-convex assembly; and
upon action of the force generating source member, the disk is coupled with the out-extending shaft via the coupling disk
so that the external force member and the out-extending shaft are coupled.
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