Pad spring
A pad spring of a caliper brake according to the present embodiment is provided as a pair of pad springs for elastically supporting a pair of pad plates on a carrier, and the pad springs includes a pair of clip bases in contact with protruding surfaces of protrusions formed on two sides of the pad plates, a pair of first anchors connected to lower ends of the clip bases and formed to be curved in contact with lower surfaces of the protrusions, a pair of second anchors connected to upper ends of the clip bases and formed to be curved in contact with upper surfaces of the protrusions, a connector configured to connect the pair of second anchors, and a pair of retainers having one ends bonded to the clip bases and formed to extend inward and the other ends curved outward to be in contact with and support the pad plates and formed to extend, wherein the pair of retainers include an inner retainer in contact with and supporting an inner pad of the pair of pad plates and an outer retainer in contact with and supporting an outer pad of the pair of pad plates, and the inner retainer is formed of a material having a higher rigidity than the outer retainer.
1 . A pair of pad springs for elastically supporting a pair of pad plates on a carrier, the pad springs comprising:
a pair of clip bases in contact with protruding surfaces of protrusions formed on two sides of the pad plates;
a pair of first anchors connected to lower ends of the clip bases and formed to be curved in contact with lower surfaces of the protrusions;
a pair of second anchors connected to upper ends of the clip bases and formed to be curved in contact with upper surfaces of the protrusions;
a connector configured to connect the pair of second anchors; and
a pair of retainers having one ends bonded to the pair of clip bases and formed to extend inward and the other ends curved outward to be in contact with and support the pair of pad plates and formed to extend,
wherein the pair of retainers include an inner retainer in contact with and supporting an inner pad, which directly receives a force of a press member, of the pair of pad plates, and an outer retainer in contact with and supporting an outer pad, which indirectly receives the force of the press member, of the pair of pad plates, and
the inner retainer is formed of a material having a higher rigidity than a material of the outer retainer to correspond to asymmetric pressure applied to the pair of pad plates,
wherein:
at least one opening is formed in a flat portion of each of the pair of retainers; and
a total area of the opening formed in the inner retainer is smaller than a total area of the opening formed in the outer retainer.
2 . The pad spring of claim 1 , wherein a portion of the inner retainer bonded to one of the pair of clip bases is positioned closer to one of the pad plates than a portion of the outer retainer bonded to the other of the clip bases is to the other of the pair of pad plates.
3 . The pad spring of claim 1 , wherein the inner retainer is formed of one of iron, aluminum, and hard plastic.
4 . The pad spring of claim 1 , wherein a shape of the opening includes at least one of a circular shape, an elliptical shape, a rectangular shape, a square shape, and a rhombus shape.
5 . A pair of pad springs for elastically supporting a pair of pad plates on a carrier, the pad springs comprising:
a pair of clip bases in contact with protruding surfaces of protrusions formed on two sides of the pad plates;
a pair of first anchors connected to lower ends of the clip bases and formed to be curved in contact with lower surfaces of the protrusions;
a pair of second anchors connected to upper ends of the clip bases and formed to be curved in contact with upper surfaces of the protrusions;
a connector configured to connect the pair of second anchors; and
a pair of retainers having one ends bonded to the pair of clip bases and formed to extend inward and the other ends curved outward to be in contact with and support the pair of pad plates and formed to extend,
wherein the pair of retainers include an inner retainer in contact with and supporting an inner pad, which indirectly receives a force of a press member, of the pair of pad plates, and an outer retainer in contact with and supporting an outer pad, which directly receives a force of the press member, of the pair of pad plates, and
the inner retainer is formed of a material having a lower rigidity than a material of the outer retainer to correspond to asymmetric pressure applied to the pair of pad plates,
wherein:
at least one opening is formed in a flat portion of each of the pair of retainers; and
a total area of the opening formed in the inner retainer is greater than a total area of the opening formed in the outer retainer.
6 . The pad spring of claim 5 , wherein a portion of the inner retainer bonded to one of the pair of clip bases is positioned farther from one of the pair of pad plates than a portion of the outer retainer bonded to the other of the clip bases is from the other of the pair of pad plates.
7 . The pad spring of claim 5 , wherein the outer retainer is formed of one of iron, aluminum, and hard plastic.
8 . The pad spring of claim 5 , wherein a shape of the opening includes at least one of a circular shape, an elliptical shape, a rectangular shape, a square shape, and a rhombus shape.