Constructobots
Name Transforms Into… Body Part When Emerging
Pile Up Tractor Right Leg
Mixing Bowl Cement Truck Left Leg
Transport Dumper Dump Truck Body
Power Lift Crane Head
Dirt Crusher Bulldozer Left Arm
Scoop Dude Steam Shovel Right Arm

They Combine To form BUILDONOID

Are they're actually some rescue stuff or something like that?

No. Construction vehicles.