Drive unit, electrically assisted vehicle having the drive unit, and method of assembling the drive unit
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorTomohiro Usami
Life of this patent
Estimating the term…
Abstract
A drive unit for an electrically assisted vehicle includes an electric motor, an electronic circuit board including a control circuit that controls rotation of the electric motor, a holder that covers an entirety or a portion of the electronic circuit board and is fixed to the electronic circuit board, and a housing that accommodates the electric motor, the electronic circuit board, and the holder, such that the electronic circuit board is at a deeper position than the holder. A position of the holder on the electronic circuit board is fixed by tabs. The holder and the electronic circuit board are fixed to the housing by fasteners extending through first holes in the electronic circuit board and second holes in the holder.
Claims15
A drive unit for an electrically assisted vehicle, the drive unit comprising:
- an electric motor;
- an electronic circuit board having mounted thereon a control circuit that controls rotation of the electric motor;
- a holder that covers an entirety or a portion of the electronic circuit board and is fixed to the electronic circuit board;
- and
- a housing that accommodates the electric motor, the electronic circuit board, and the holder, such that the electronic circuit board is accommodated at a deeper position than the holder;
- wherein
- the electronic circuit board includes a first hole;
- the holder includes a second hole and at least two tabs;
- a position of the holder on the electronic circuit board is fixed by the at least two tabs;
- and
- the electronic circuit board and the holder are fixed to the housing by a fastener extending through the first hole and the second hole.
A method of assembling a drive unit for an electrically assisted vehicle, the method comprising:
- providing a housing;
- providing an electronic circuit board having mounted thereon a control circuit that controls rotation of an electric motor that drives the electrically assisted vehicle, the electronic circuit board including a first hole;
- providing a holder including at least two tabs and a second hole;
- using the at least two tabs to fix a position of the holder on the electronic circuit board so that the holder covers an entirety or a portion of the electronic circuit board;
- inserting the electronic circuit board into the housing while pressing on the holder, so that the electronic circuit board is accommodated at a deeper position than the holder;
- and
- fixing the electronic circuit board and the holder to the housing by passing a fastener through the first hole and the second hole.
Dependencies are inferred from the claim text.