| CPC B60T 13/588 (2013.01) [B60T 13/746 (2013.01); F16D 55/228 (2013.01); F16D 65/0068 (2013.01); F16D 65/0087 (2013.01); F16D 65/18 (2013.01); F16D 2055/0016 (2013.01); F16D 2055/007 (2013.01); F16D 2121/04 (2013.01); F16D 2121/24 (2013.01); F16D 2125/40 (2013.01)] | 10 Claims |
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1. A brake caliper, comprising:
a fixed seat, having a first side wall, a second side wall opposite to the first side wall, and an accommodating space defined between the first side wall and the second side wall; an inner wall surface of the first side wall having at least one piston groove parallel to an axis and communicating with the accommodating space, an outer wall surface of the second side wall having a piston hole parallel to the axis and communicating with the accommodating space, the fixed seat further having an oil passage communicating with the piston groove and the piston hole, the oil passage having an opening, the outer wall surface of the second side wall further having at least two guide holes parallel to the axis;
a piston unit, including at least one first piston slidably disposed in the piston groove and a second piston slidably disposed in the piston hole, one side of the second piston, facing an outside of the fixed seat, being recessed with a receiving groove, an inner wall surface of the receiving groove being provided with at least one guide portion parallel to the axis, the second piston having a pushed face at a bottom of the receiving groove, the piston unit further including a pushing member slidably disposed in the receiving groove, an outer wall surface of the pushing member being provided with at least one slide portion corresponding to the guide portion, the slide portion being slidably connected to the guide portion so that the pushing member is slidable relative to the second piston along the axis, one side of the pushing member, facing the pushed face, having a pushing face, a push space being defined between the pushing face and the pushed face, one side of the pushing member, facing an outside of the receiving groove, having a restricting face, the restricting face being formed with a screw hole parallel to the axis, at least one first flow channel being defined between an outer wall surface the second piston and an inner wall surface of the piston hole, the first flow channel communicating with the oil passage, at least one second flow channel being defined between an inner wall surface the second piston and the outer wall surface of the pushing member, the second flow channel communicating with the push space;
a cover, disposed on an outside of the piston hole, an inner wall surface of the cover having a blocking portion extending toward the piston hole, the blocking portion being formed with at least one perforation, wherein when the second piston slides toward the cover and abuts against the blocking portion, the perforation communicates with the first flow channel and the second flow channel, an outer wall surface of the cover having a shaft hole corresponding to the screw hole;
a brake lining unit, disposed in the accommodating space, the brake lining unit having a first brake lining disposed close to the first piston and a second brake lining disposed close to the second piston;
a movable seat, disposed adjacent to an outer side of the second side wall, the movable seat being provided with guide posts corresponding to the respective guide holes, the guide posts being inserted through the respective guide holes so that the movable seat can slide relative to the fixed seat parallel to the axis, the movable seat having a positioning hole corresponding to the shaft hole, a peripheral side of the movable seat including a link arm extending toward the first side wall, a distal end of the link arm being provided with a link portion, the link portion being located between the first side wall and the first brake lining;
a drive unit, disposed on the movable seat, the drive unit being movable along with the movable seat, the drive unit having a drive rod that is rotatably disposed in the positioning hole, one end of the drive rod being provided with a shaft portion corresponding to the shaft hole, the shaft portion being slidable in the shaft hole, a screw portion extending from a front end of the shaft portion and corresponding to the screw hole, the screw portion being screwed to the screw hole, another end of the drive rod being provided with a connecting portion for connecting a drive source, the drive rod being driven by the drive source to screw the pushing member to slide in the receiving groove.
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