Train tractor (for high-speed train, subway train and passenger train) --- train puller which is developed successfully by the company, is a kind of new automatic hitching machine, it overcomes the defects of hitching coupler traction device and ensures the safety, efficiency and automation of train washing. At present, except us, there is not any other company who owns the technology of train tractor (high-speed train, subway train and passenger train) --- train puller, so as to fill up the gap of “hitching” wheel traction in China.
　　Train tractor overcomes a series of defects of the last generation, such as big position error of hitching coupler, drawing rope hitching, traction position, scratching the surface of train easily, wearing the components and parts of train, poor safety, low efficiency, and busy rails and so like.
　　Train tractor has the following high performance: hitching and separating automatically, automatic traction controlled by program, wearing-resistant the parts of train, precise position, anti-slipping traction force, secure reliance, in any kind of weather, high efficiency (compared to similar foreign products), and traction speed adjustable with the load between 0 to 1.8 km/h and no-load between 1 to 3 km/h.
Equipment Composition and Characteristics:
　　Train tractor (high-speed train, subway train and passenger train) --- train puller is composed of automatic traction device, traction rope, automatic tensioning device of rope, direction changing device of traction end, direction changing device of direction changing end, the supporting roller device of rope, automatic hitching machine, electrical automatic control system and etc..
Characteristics:
 Hitching traction wheel doesn’t need to open train hitching coupler;
 Travel on the washing traction rails. When train tractor doesn’t work, it never intrudes         the building limits and never occupies the rails, and thus doesn’t affect the trains which are passing on it.
 Automatic hitching and separating, doesn’t need manual assistance. The hitching and separating time is only 30 second;
 Monitor the whole process of hitching and separating by video monitor;
 Realize mutual and combined control with washing machine and complete the whole washing process automatically;
 Pull by rope with big traction force and anti-slipping between wheels and rails.
 Safety. When the manipulator intrudes the “limits”, the strong red alarm light on the hitching machine inside the rails warns the driver, at the same time, the red light of signal of the rails turns on automatically, locks the rails to make sure the safety of people who drives the train and work on the rails.
Technical Characteristics and Parameters:
Automatic hitching machine:　―――――――   Run inside the rails
Rail of automatic hitching machine:　―――――   P60 rail base
Traction part:　　　―――――――――――   Wheel rim of multiple units
Max. traction force: ――――――――――― 　60kN
Load pulling speed :　――――――――――　0～1.8 km/h
No-load travel speed:　――――――――――　0～3 km/h
Stopping position error:　―――――――――　±500mm
Max. number of traction train units: ――――16 units
Max. mass of traction train units: ―――――800 t
Traction motor power: ―――――――――――37kW
Gross power: ―――――――――――――――42kW