US 11,953,063 B2
Normally closed disc clamp system and rotary table using the same
Peng-Wen Chen, Taichung (TW); Chien-Yu Lin, Taichung (TW); and Li-Wen Huang, Taichung (TW)
Assigned to HIWIN TECHNOLOGIES CORP., Taichung (TW)
Filed by HIWIN TECHNOLOGIES CORP., Taichung (TW)
Filed on Aug. 31, 2021, as Appl. No. 17/462,583.
Prior Publication US 2023/0068977 A1, Mar. 2, 2023
Int. Cl. F16D 55/32 (2006.01); F16D 55/30 (2006.01); F16D 65/12 (2006.01); F16D 121/04 (2012.01); F16D 123/00 (2012.01); F16D 125/08 (2012.01)
CPC F16D 55/32 (2013.01) [F16D 55/30 (2013.01); F16D 65/12 (2013.01); F16D 2121/04 (2013.01); F16D 2123/00 (2013.01); F16D 2125/08 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A normally closed disc clamp system, comprising:
a housing comprising a receiving groove;
a disc assembly arranged in said receiving groove of said housing, said disc assembly comprising a first fixed disc, a second fixed disc and a rotating disc, said rotating disc being set between said first fixed disc and said second fixed disc;
a brake ring movably installed in said receiving groove of said housing and forming a first chamber with said housing, said brake ring comprising a brake portion pressing against said first fixed disc when said brake ring is located at a braking position, so that said rotating disc is fixed between said first fixed disc and said second fixed disc, and releasing said first fixed disc when said brake ring is located at a brake releasing position, so that said rotating disc is rotatable relative to said first fixed disc and said second fixed disc;
a pressure-enhancing ring provided in said receiving groove of said housing and partially abutting said brake ring, so that a second chamber is formed between said pressure-enhancing ring and said brake ring; and
an elastic unit installed in said pressure-enhancing ring to push said pressure-enhancing ring in the direction of said brake ring;
wherein when a fluid is only supplied to the first chamber, said brake ring is kept in said brake releasing position by the action of said fluid; when said fluid is only supplied to said second chamber, said brake ring is held in said braking position by said fluid, and said pressure-enhancing ring compresses said elastic unit by the action of said fluid; the direction of the force applied by said fluid to said pressure-enhancing ring is opposite to the direction of the force applied by said elastic unit to said pressure-enhancing ring; when said fluid is stopped from entering said first chamber and said second chamber, said pressure-enhancing ring pushes said brake ring by the force exerted by said elastic unit, so that said brake ring is kept in said braking position, wherein said brake portion of said brake ring comprises a brake surface, said brake ring pressing said first fixed disc with said brake surface of said brake portion when said brake ring is located at said braking position, said brake ring further comprising an inner ring surface adjacent to said brake surface, said brake surface and said inner ring surface defining therebetween a first included angle, said first included angle being less than 90 degrees.