A insulating backing plate that is used for protruding structure of having of track traffic fastener

The utility model discloses an insulating backing plate that is used for protruding structure of having of track traffic fastener, including insulating backing plate bottom plate, offered two installation through -holes on it, its line of centres and orbital motion angular separation are lighter than 90, and this insulation backing plate bottom plate has been offered and has been cylindrical protruding structure lieing in every installation through -hole department, and protruding structure is used for cup jointing with the elastic cushion who has the trompil in the relevant position, and protruding structure division has the axial direction through -hole and has a perfect understanding with installation through -hole on the insulation backing plate along the pathway vertical orientation to be connected with the base member after being used for the fastener to pass two through -holes. The utility model discloses an insulating backing plate improves through the optimization to current insulating base plate str