Accelerator pedal apparatus

摘要

An accelerator pedal apparatus includes a pedal arm rotating around a first rotation axis line, a return spring and a reaction force adding mechanism including a drive source and a rotation member rotating around a second rotation axis line and having a contact portion contacted to the pedal arm which adds reaction force in the direction to return the pedal arm to the rest position. A first distance from the contact position of the pedal arm with the contact portion to the first rotation axis line is longer than a second distance to the second rotation axis line. The pedal arm includes a contact section having the contact portion displaced while being contacted so that the contact portion is to be farther from the first rotation axis line when rotating toward the maximum depression position and to be closer to the first rotation axis line when rotating toward the rest position.

主权项

1. An accelerator pedal apparatus comprising:
a pedal arm interlocked with an accelerator pedal; a housing to support the pedal arm between a rest position and a maximum depression position as being rotatable around a first rotation axis line; a return spring to return the pedal arm toward the rest position; and a reaction force adding mechanism which includes a drive source arranged at the housing and a rotation member having a contact portion being contacted detachably attachable to the pedal arm and being rotated around a second rotation axis line in a same direction as the pedal arm in a state of being contacted to the pedal arm and in which the rotation member adds reaction force in the direction to return the pedal arm to the rest position with drive force of the drive source, the drive source being an induction torque motor having a drive shaft integrally rotated coaxially to the second rotation axis line, wherein the pedal arm includes a pedal side arm which is interlocked with the accelerator pedal and a contact side arm which defines a contact section, the pedal side arm extending to one side and the contact side arm extending to an other side so as to sandwich the first rotation axis line, the contact portion includes a roller in rolling contact with the contact section, a position sensor detecting an angular position of the pedal arm is arranged in the first rotation axis line, a first distance from a contact position of the pedal arm with the contact portion to the first rotation axis line is formed longer than a second distance from the contact position of the pedal arm with the contact portion to the second rotation axis line; the rotation member is a rotation lever to define the contact portion at a free end of the rotation member; the contact side arm includes the contact section which has a nonlinear cam profile to convert a rotational drive force of the torque motor into a rotational torque of the rotation lever, and the cam profile is formed so that the contact portion is displaced to recede from the first rotation axis line and approach to an upper end portion of the pedal arm by rolling the roller while the contact portion is contacted to the contact section when the pedal arm is rotated toward the maximum depression position and so that the contact portion is displaced to approach the first rotation axis line while the contact portion is contacted to the contact section by rolling the roller when the pedal arm is rotated toward the rest position; wherein when the reaction force adding mechanism adds reaction force to the pedal arm in the return direction through the rotation member, the rotation member adds the reaction force to the pedal arm where the contact position is displaced depending on the rotational position of the pedal arm.