Method for inspecting ball screw device, inspection jig, and inspection device
AssigneeNtn Corporation
InventorAkio KATO
Life of this patent
Estimating the term…
Abstract
In inspecting the number of balls 30 disposed in circulation paths S1 to S3 of a ball screw device 1, an inspection jig 40 is inserted between the balls 30 disposed in the circulation paths S1 to S3 from a gap between a nut 10 and a screw shaft 20, and the number of the balls 30 is inspected by an insertion state of the inspection jig 40 at this time.
Claims11
A method for inspecting a number of balls disposed in a circulation path of a ball screw device, the method comprising inserting an inspection jig between the balls disposed in the circulation path through a gap between a nut and a screw shaft of the ball screw device, and inspecting the number of the balls by an insertion state of the inspection jig at a time of insertion.
An inspection jig that is inserted between balls disposed in a circulation path of a ball screw device and inspects a number of the balls, wherein
- the inspection jig includes a narrow portion and a wide portion provided on an insertion direction rear side of the narrow portion,
- a circumferential width of the narrow portion is larger than a total gap amount between the balls when the number of the balls disposed in the circulation path is excessively large, and is smaller than a total gap amount between the balls when the number of the balls disposed in the circulation path is appropriate, and
- a circumferential width of the wide portion is larger than a total gap amount between the balls when the number of the balls disposed in the circulation path is appropriate, and is smaller than a total gap amount between the balls when the number of the balls disposed in the circulation path is excessively small.
An inspection device for a ball screw device, the inspection device inspecting a number of balls disposed in a circulation path of the ball screw device, the inspection device comprising:
- an inspection jig;
- an inspection jig drive unit that inserts the inspection jig between the balls disposed in the circulation path;
- and a determiner that determines whether the number of the balls in the circulation path is appropriate or inappropriate by an insertion state of the inspection jig.
Dependencies are inferred from the claim text.