| 摘要 |
<p>A feeding apparatus includes a screw shaft (23), a feeding nut (24), a supporting member (31, 32), a driving unit (25), an intermediate member (7, 8) supported by the screw shaft (23) and arranged to be rotatable relative to the supporting member (31, 32), and an elastic biasing mechanism (71b, 44, 74, 75, 46, 84), The intermediate member (7, 8) includes a radial sliding contact surface (71a, 73, 76a, 75a, 81a) slidably contacting a radial bearing surface (32c) of the supporting member (31, 32), first and second thrust sliding contact surfaces (71b, 74, 76b, 82 / 72, 74, 75b, 81) contacting first and second thrust bearing surfaces 32b) formed at the supporting member (31, 32), respectively. The elastic biasing mechanism (71b, 44, 74, 75, 46, 84) elastically biases the first and second thrust sliding contact surfaces (71b, 74, 76b, 82 / 72, 74, 75b, 81) of the intermediate member (7, 8) to contact the first and second thrust bearing surfaces (32b), respectively, and further elastically biases the intermediate member (7, 8) to a thrust receiving member (43, 76, 83) provided at the screw shaft (23) for assembling the intermediate member (7, 8) and the thrust receiving member (43, 76, 83) onto the screw shaft (23) without a clearance between the intermediate member (7, 8) and the thrust receiving member (43, 76, 83).</p> |
