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Patent Searching and Data


Title:
BALL SCREW DEVICE
Document Type and Number:
Japanese Patent JP2003148584
Kind Code:
A
Abstract:

To provide an end cap-type ball screw device suitable for miniaturization, having a simple structure for endlessly circulating a ball, reducing the number of components, and simplifying the machining in manufacturing.

In this ball screw device composed of a screw shaft 1 provide with a spiral ball rolling groove 10 on an outer peripheral face with a predetermined lead, and a nut member 4 having a through hole for penetrating the screw shaft 1, having an approximately cylindrical shape, provided with a spiral load rolling groove 42 located oppositely to the ball rotating groove 10 of the screw shaft 1 to form a spiral load ball passage, and engaged with the screw shaft 1 through a number of balls 2, an open groove 47 is formed on an end face of a nut member 4 vertical to the axial direction of the screw shaft 1, and a donut-shaped flat member 5 covering the open groove 47 is fixed to an end face of the nut member 4, whereby the endless circulating passage of the ball 2 is formed.


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Inventors:
TACHIKAKE YUJI
TAKANO FUJIO
Application Number:
JP2001348340A
Publication Date:
May 21, 2003
Filing Date:
November 14, 2001
Export Citation:
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Assignee:
THK CO LTD
International Classes:
F16H25/22; (IPC1-7): F16H25/22
Attorney, Agent or Firm:
Tetsuro Ide (3 others)