The invention discloses an automatic charging device for recessed electric rails of electric vehicles driven on a highway. A left recessed electric rail and a right recessed electric rail are arranged on the two sides of the middle part of vertical rods of partition fences in the middle of a bi-directional lane; a left grounded electric rail and a right grounded electric rail are arranged on the two sides of the lower ends of the vertical rods, and are not arranged at the crossroads, so that a pavement is not occupied, transportation and city appearance are not affected, and electric vehicles can be charged automatically as long as moving near to the double electric rails of the partition fences; a power supply cavity opening below a n-shaped plastic track of each recessed electric rail faces downwards, and a power supply
copper square
pipe is hidden at the upper part inside the cavity to prevent the invasion of water sprayed from various directions; the head ends of the left electric rail and the right electric rail pass through an underground cable, and are connected with a power supply of a
toll power feeding
station; an arc ground wire carbon
brush of an automatic transformation carbon
brush rack of a vehicle-mounted
electrical control automatic
current collector rotates backwards automatically through the elastic force and sliding
friction force between the arc ground wire carbon
brush and an grounded electric rail
copper square
pipe; a live wire carbon brush rack erects upwards, a positioning claw positions the live wire carbon brush rack in the vertical state, the upper end of a live wire carbon brush is positioned in the middle of the
copper square
pipe inside a recessed electric rail cavity and receives
electricity through sliding and connection; when the vehicle leaves from the double electric rails, the
current collector is shrunk automatically, and the vehicle bottom can be concealed.