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US 8,882,568 B2Granted
Impact absorbing mechanism of gear train
AssigneeMakita Corporation
InventorHiroki Ikuta
Life of this patent
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AssigneeMakita Corporation
InventorHiroki Ikuta
Estimating the term…
An impact absorbing mechanism for absorbing impact generated upon meshing of gears by starting or stopping an electric motor, for example, in a speed reduction gear train of a disk grinder, has the problem that its ease of manufacture and the durability are lowered because small elastic components are located between a driven gear and a driven shaft when an impact absorbing action occurs in the rotational direction in the related art. The present invention is aimed to improve the ease of manufacture and the durability of the impact absorbing mechanism. It is configured to absorb impact by displacing steel balls in a diameter expanding direction by relative rotation of a driven gear and a driven shaft due to rotational power generated upon meshing and by displacing an axial displacement member in an axial direction against an axial elastic member.
An impact absorbing mechanism of a gear train that transmits the rotational power of a driving shaft to a driven shaft, wherein the gear train includes a drive gear on the side of the driving shaft and a driven gear on the side of the driven shaft, which mesh with each other, wherein, in a rotational power transmission path between the driven gear and the driven shaft, there is provided a radial displacement member that is supported by the driven gear so as to be displaceable in a radial direction, an axial displacement member that displaces in an axial direction by the displacement of the radial displacement member in a diameter expanding direction, and an axial elastic member that performs an impact absorbing action with respect to the displacement of the axial displacement member in the axial direction, and wherein the axial displacement member is displaced in the axial direction by the rotation of the driven gear relative to the driven shaft, so that impact generated upon meshing between the drive gear and the driven gear is absorbed.
An impact absorbing mechanism of a gear train that transmits rotational power of a driving shaft to a driven shaft, wherein the gear train includes a drive gear on the side of the driving shaft and a driven gear on the side of the driven shaft, which mesh with each other, wherein, in a rotational power transmission path between the driven gear and the driven shaft, there is provided a radial displacement member that is supported by the driven gear so as to be displaceable in a radial direction, and a radial elastic member that performs an impact absorbing action with respect to the displacement of the radial displacement member in the diameter expanding direction, wherein the radial displacement member is displaced in the diameter expanding direction by the rotation of the driven gear relative to the driven shaft, so that impact generated upon meshing between the drive gear and the driven gear is absorbed.
Dependencies are inferred from the claim text.