To reduce the noise of a speed reducer.SOLUTION: A shaft supporting structure 101 of a speed reducer 100 is equipped with a first bearing 4 rotatably supporting a base end side of a worm shaft 2, a second bearing 11 rotatably supporting a tip end side of the worm shaft 2, and a coil spring 12 energizing the worm shaft 2 toward a worm wheel 1 through the second bearing 11. The first bearing 4 has an inner ring 142 having an inside raceway groove 142a, an outer ring 141 having an outside raceway groove 141a, and a plurality of balls 143 disposed between the inside raceway groove 142a and the outside raceway groove 141a. The shaft supporting structure 101 is further equipped with pressing means for pressing a part of the outer ring 141 in an axial direction of the worm shaft 2.SELECTED DRAWING: Figure 4
【課題】減速機の騒音を低減する。【解決手段】減速機100の軸支持構造101は、ウォーム軸2の基端側を回転自在に支持する第1軸受4と、ウォーム軸2の先端側を回転自在に支持する第2軸受11と、第2軸受11を介して、ウォーム軸2をウォームホイール1へ向けて付勢するコイルスプリング12と、を備え、第1軸受4は、内側軌道溝142aを有する内輪142と、外側軌道溝141aを有する外輪141と、内側軌道溝142aと外側軌道溝141aとの間に配置される複数のボール143と、を有し、軸支持構造101は、外輪141の一部をウォーム軸2の軸方向へ押圧する押圧手段をさらに備える。【選択図】図4
SHAFT SUPPORTING STRUCTURE OF SPEED REDUCER AND STEERING DEVICE
減速機の軸支持構造及びステアリング装置
2021-06-10
Patent
Electronic Resource
Japanese
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