Electric motor mounting structure for vehicles

1. A structure for mounting an electric motor in a vehicle, comprising:

a mounting frame detachably fixed to a body component of the vehicle by a bolt;

a upward-projecting bracket, which is upwardly projected from said mounting frame, being attached to the body component of the vehicle;

a bolt hole, in which the bolt is inserted, being formed on said upward-projecting bracket; and

a downward-projecting bracket, which is downwardly projected from said mounting frame, being connected to the electric motor,

both said mounting frame and said downward-projecting bracket being set apart from an axis of said bolt hole inward in the width direction of the vehicle, and

said downward-projecting bracket is disposed in a position beneath said upwardly-projecting bracket in side view.

2. The mounting structure according to claim 1 , further comprising:

a cross member connecting both ends of the mounting frame, which is a U-shaped member, wherein

a control unit, for managing the electric motor, is disposed on said cross member and is electrically connected with the electric motor.

3. The mounting structure according to claim 1 , wherein

said mounting frame is made by bending a pipe into a substantially U shape.

4. The mounting structure according to claim 1 , wherein

said upward-projecting bracket and said downward-projecting bracket are fixed adjacent to an end of the mounting frame.

5. The mounting structure according to claim 1 further comprising:

a motor bracket being fixed to said electric motor; and

a pair of vibration dampeners being equipped with both ends of said motor bracket, wherein

a pair of said downward-projecting brackets, which are individually fixed adjacent to both ends of the mounting frame, supports said electric motor via the pair of said vibration dampeners.

6. The mounting structure according to claim 1 , wherein

said mounting frame and said downward-projecting bracket are set apart from the axis of said bolt hole by a distance just sufficient enough to insert said bolt into said bolt hole.

7. A structure for mounting an electric motor to a vehicle, the mounting structure comprising:

means for fixing the electric motor to the vehicle; and

means for defining a position of a motor-roll-center, which is an axis of roll-momentum of the electric motor when the electric motor works, to be in a transversal direction of the vehicle, wherein

said motor-roll-center defining means sets the location of the motor-roll-center above a center of gravity of the electric motor.

8. The mounting structure according to claim 7 , wherein

said motor-roll-center defining means sets the location of the motor-roll-center directly over the center of gravity of the electric motor.

9. The mounting structure according to claim 7 , wherein

said electric motor fixing means and said motor-roll-center defining means which are integrated and which enable the electric motor to be equipped with the vehicle so that a rotation axis of the electric motor extends in the transversal direction of the vehicle.

10. The mounting structure according to claim 7 , further comprising:

a mounting frame fixed to a body component of the vehicle; and

a downward-projecting bracket provided to said mounting frame,

wherein said motor-roll-center defining means defines the position of the motor-roll-center by changing the position of said downward-projecting bracket at said mounting frame and characteristics of a rubber bush fixed to said downward-projecting bracket.