US 11,913,525 B2
Belt drive device
Hirokazu Kume, Yamanashi (JP)
Assigned to FANUC CORPORATION, Yamanashi (JP)
Appl. No. 17/996,205
Filed by FANUC CORPORATION, Yamanashi (JP)
PCT Filed Jul. 26, 2021, PCT No. PCT/JP2021/027496
§ 371(c)(1), (2) Date Oct. 13, 2022,
PCT Pub. No. WO2022/024977, PCT Pub. Date Feb. 3, 2022.
Claims priority of application No. 2020-130298 (JP), filed on Jul. 31, 2020.
Prior Publication US 2023/0213088 A1, Jul. 6, 2023
Int. Cl. F16H 19/08 (2006.01); B25J 9/10 (2006.01); F16H 7/10 (2006.01)
CPC F16H 19/08 (2013.01) [B25J 9/1045 (2013.01); F16H 7/10 (2013.01); F16H 2019/085 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A belt drive device comprising:
a first pulley and a second pulley that are rotatably arranged at a predetermined distance in a device main body,
a belt that is configured to be wrapped around the first pulley and the second pulley, and
an adjustment mechanism that is provided to the first pulley and configured to adjust an interaxial distance between the first pulley and the second pulley, wherein
the adjustment mechanism includes:
a support member that rotatably supports the first pulley,
a first long hole provided in at least one selected from the device main body and the support member, the first long hole having a length direction along an interaxial direction that connects a rotation axis of the first pulley and a rotation axis of the second pulley,
a first fastening member including a shaft portion that is inserted into the first long hole and that fastens the support member to the device main body,
a second long hole provided in at least one selected from the device main body and the support member, the second long hole having a length direction along the interaxial direction, the second long hole being shorter than the first long hole, and
a second fastening member including a shaft portion that is inserted into the second long hole and that fastens the support member to the device main body,
the first long hole has a first length that allows the support member to move toward the second pulley until the interaxial distance reaches at least a distance at which the belt cam be wrapped around the first pulley and the second pulley when the second fastening member is removed, and
the second long hole has a second length that retains the interaxial distance to a distance at which the belt wrapped around the first pulley and the second pulley is prevented from being dislodged when the second fastening member is installed.