| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a gear whose rigidity can be made high, and which can be easily made light. <P>SOLUTION: A gear comprises: a hub 2 in which a rotary shaft penetrates the inner circumference thereof; a disk 3 which is formed while extending in a diameter enlarging direction from the hub 2; a rim 4 which is formed while extending in the diameter enlarging direction from the disk 3 and has outer circumferential teeth 41 on the outer circumference thereof; and a gear piece 5 which is disposed in the axial line direction of the rotary shaft while interposing a lightening space 6 between the gear piece and the disk 3 and provided to connect the hub 2 and the rim 4 and has a spline engage section 53 along the outer circumference thereof. <P>COPYRIGHT: (C)2013,JPO&INPIT |
