Patent ID: 8851215
Filing Date: 2014-10-07
Classification: A01D,B60L,B62B,B62M,Y02P,Y02T

Abstract:
1. An electric wheeled apparatus comprising: a main body; at least one wheel supported by the main body in a rotatable manner; an electric motor configured to apply torque to the at least one wheel; a battery interface configured to removably receive at least first battery pack and a second battery pack which are each originally designed as a power source of an electric power tool, wherein the battery interface is configured to receive the first and second battery packs while the first and second battery packs are detached from the power tool; and an electric circuit unit configured to electrically connect the first and second battery packs attached to the battery interface with the electric motor, wherein the battery interface comprises a first positive connection terminal, a first negative connection terminal, a second positive connection terminal and a second negative connection terminal, the first positive connection terminal and the first negative connection terminal are configured to be electrically connected with a positive terminal and a negative terminal of the first battery pack respectively when the first battery pack is attached to the battery interface, the second positive connection terminal and the second negative connection terminal and configured to be electrically connected with a positive terminal and a negative terminal of the second battery pack respectively when the second battery pack is attached to the battery interface, and the electric unit is configured to selectively be switched to form a series connection circuit in which the first positive connection terminal is electrically connected with the second negative connection terminal with the electric motor being electrically interposed in the connection circuit between the first positive connection terminal and the second negative connection terminal, and in which the first negative connection terminal is electrically connected with the second positive connection terminal without the electric motor being electrically interposed in the connection circuit between the first negative connection terminal and the second positive connection terminal, and the electric circuit unit is further configured to selectively be switched to form any one of the series connection circuit and a parallel connection circuit in which the first positive connection terminal is electrically connected with the second positive connection terminal without the electric motor being electrically interposed in the connection circuit between the first positive connection terminal and the second positive connection terminal, and in which the first negative connection terminal is electrically connected with the second negative connection terminal without the electric motor being electrically interposed in the connection circuit between the first negative connection terminal and the second negative connection terminal.