# US 2013/0153344 A1 · Composite disc rotor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0153344 A1 - Document ID: US20130153344A1 - Status: Published application - Kind: A1 - Application number: 13/714,824 - Filed: 2012-12-14 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Assignees: Akebono Brake Industry Co., Ltd. - Inventors: Takefumi MORIO; Shinjiro MASUKO; Takaaki SASAKI; Tomoki YACHI - Web page: https://patentgrep.com/patent/US20130153344A1 ## CPC - F16D 65/123: {comprising an annular disc secured to a hub member; Discs characterised by means for mounting} - F16D 65/12: Discs; Drums for disc brakes - F16D 65/126: {the material being of low mechanical strength, e.g. carbon, beryllium; Torque transmitting members therefor} - F16D 2065/1316: {radially segmented} - F16D 2065/1328: {internal cavities, e.g. cooling channels} - F16D 2065/1348: {resilient} - F16D 2065/1364: {with relative movement axially} - F16D 2065/1392: {Connection elements} - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES ## Abstract A composite disc rotor includes a disc main body, a coupling bracket and coupling units. Each of the coupling units includes a bobbin, a clip and a coupling bolt. A head part of the bobbin includes a torque receiving portion inserted in the notch and a projection projected in a circumferential direction from an end of the torque receiving portion. A pipe part of the bobbin is extended from the head part and is fitted in a coupling through hole of the disc main body. The clip includes a connecting portion between the torque receiving portion and the notch and a pressing portion extended from the connecting portion between the head part and the coupling bracket. The coupling bolt is inserted into each of through hole of the bobbin to fix the coupling bracket to the coupling unit. ## Claims ### Claim 1 A composite disc rotor comprising: a disc main body, having a ring shape, having a pair of friction surfaces which are opposite each other in an axial direction of the disc main body and to which pads are pushed upon braking, including a plurality of coupling portions at a plurality of circumferential positions of the disc main body, each of the coupling portions being disposed inner side in a radial direction of the disc main body and being formed with a coupling through hole; a coupling bracket, having a plurality of notches which are opened in an outer peripheral edge of the coupling bracket and disposed at the plurality of circumferential positions; and a plurality of coupling units, disposed at the plurality of circumferential positions, and each of which includes a bobbin including a head part and a pipe part, a clip and a coupling bolt, wherein the head part includes a torque receiving portion inserted in each of the notches and a projection projected in a circumferential direction of the disc main body from an end of the torque receiving portion in the axial direction, the pipe part is extended from the head part and is fitted in the coupling through hole, each of the bobbins is formed with a through hole penetrating the head part and the pipe part, each of the clip includes a connecting portion between the torque receiving portion and a inner surface of each of the notches and a pressing portion extended from the connecting portion in the circumferential direction between the head part and the coupling bracket, and each of the coupling bolts is inserted into each of the through holes of the bobbins to fix the coupling bracket to the coupling unit, so that a torque applied to the friction surfaces is transmitted to the coupling bracket via the bobbin. ### Claim 2 (depends on 1) The composite disc rotor according to claim 1, wherein the pressing portion includes a spring portion provided between the projection and the coupling bracket so as to urge the projection away from the coupling bracket in the axial direction. ### Claim 3 (depends on 2) The composite disc rotor according to claim 2, wherein the connection portion surrounds three sides of the torque receiving portion of each bobbin and has a folded-back shape, at least two pressing portions are extended from opposed positions of the connection portion, which are bent from at least one edge of the connection portion to an opposite side to the torque receiving portion, and a part of each of the pressing portions is contacted to both circumferential side portions of each of the notches ### Claim 4 (depends on 3) The composite disc rotor according to claim 3, wherein the spring portions are formed by folding back tip half parts of a pair of the pressing portions which are extended from an edge of the connection portion at a side of the head part in the axial direction, toward the head part, and the spring portions are held between the head part and the pressing portions with being elastically compressed in the axial direction. ### Claim 5 (depends on 3) The composite disc rotor according to claim 3, wherein the respective pressing portions are extended from four positions of the connecting portion, two of the four positions are the opposed positions of the connection portion in the edge thereof at the side of the head part in the axial direction, the other two of the four positions are opposed positions of the connection portion in an opposite edge thereof at an opposite side of the head part, and the respective pressing portions interpose both circumferential sides of each notch of the coupling bracket from both axial sides. ### Claim 6 (depends on 3) The composite disc rotor according to claim 3, wherein the respective pressing portions are extended from two positions of the connecting portion, the two positions are the opposed positions of the connection portion in the edge thereof at the side of the head part in the axial direction, and both the pressing portions are contacted to one axial surface of both circumferential sides of each notch. ### Claim 7 (depends on 1) The composite disc rotor according to claim 1, wherein the pressing portion is extended from an edge of the connection portion at a side of the head part in the axial direction, an extension part is extended inward in the radial direction from the pressing portion, and the extension part includes an engaging part which is engaged with an inner end portion of the head part in the radial direction so as to restrict a displacement of the clip outward in the radial direction. ### Claim 8 (depends on 1) The composite disc rotor according to claim 1, wherein at least a part of an inner surface of each of the through holes of the bobbins is formed with female screw, and each of the coupling bolts is screwed with the female screw. ### Claim 9 (depends on 1) The composite disc rotor according to claim 1, wherein each of the clips is integrally formed of a metal sheet having a resilience and corrosion resistance.