Speed reduction mechanism, motor with speed reduction mechanism, and method for producing speed reduction mechanism
AssigneeAsmo Co., Ltd.
InventorsMasaya Horikawa, Hideyuki Yagi, Itaru Soga
Life of this patent
Estimating the term…
Abstract
A pressure angle of the worm is set to be greater than a pressure angle of the worm wheel so that a maximum number of meshing teeth becomes smaller than or equal to n (where n is a natural number) with respect to the speed reduction mechanism in which a number of meshing teeth is always n+1 or changed between n+1 and n by rotation under a condition in which the pressure angles of the worm and the worm wheel are the same with respect to each other.
Claims5
A speed reduction mechanism comprising:
- a worm made of metal;
- and
- a worm wheel that is made of self-lubricating resin and meshes with the worm,
- wherein a pressure angle of the worm at a contacting point between the worm and the worm wheel is set to be greater than a pressure angle of the worm wheel at the contacting point so that a maximum number of meshing teeth becomes smaller than or equal to n (where n is a natural number) with respect to the speed reduction mechanism in which a number of meshing teeth is always n+1 or changed between n+1 and n by rotation under a condition in which the pressure angles of the worm and the worm wheel are the same with respect to each other at the contacting point.
A manufacturing method of a speed reduction mechanism including a worm made of metal and a worm wheel made of self-lubricating plastic,
- wherein a pressure angle of the worm at a contacting point between the worm and the worm wheel is set to be greater than a pressure angle of the worm wheel at the contacting point so that a maximum number of meshing teeth becomes smaller than or equal to n (where n is a natural number) with respect to the speed reduction mechanism in which a number of meshing teeth is always n+1 or changed between n+1 and n by rotation under a condition in which the pressure angles of the worm and the worm wheel are the same with respect to each other at the contacting point.
Dependencies are inferred from the claim text.