INDEXING DEVICE
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United States of America Patent
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N/A
Issued Date -
Jul 22, 2010
app pub date -
Jul 1, 2008
filing date -
Jul 12, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An indexing device (100) is provided, in which a clamp sleeve (34a) extending along a rotary shaft (39) is disposed in the space between the rotary shaft (39) and a housing hole (31s) of a frame (31b), and the clamp sleeve (34a) bulges toward the rotary shaft (39) by supply of pressure fluid, so as to non-rotatably hold the rotary shaft (39). A pressure-receiving cylindrical portion (38a1) extending in parallel to the rotary shaft (39) is provided around the rotary shaft (39) integrally with the frame (31b). A cylinder-like portion (38b) extending along the rotary shaft (39) is provided integrally with the rotary shaft (39) in the space between the pressure-receiving cylindrical portion (38a1) and the clamp sleeve (34a). When the clamp sleeve (34a) bulges, the cylinder-like portion (38b) is pinched by the clamp sleeve (34a) and the pressure-receiving cylindrical portion (38a1). Thus, the contact area, in which a frictional force is produced, is increased, and a desirable braking force can be obtained without the pressure of the pressure fluid being increased.
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