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Connecting rod and coupling rods attached to a small locomotive driving wheel. In general, all railroad vehicles have spring suspension; without springs, irregularities in the track could lift wheels off the rail and cause impact damage to both rails and vehicles. Driving wheels are typically mounted so that they have around 1 inch (2.5 cm) of ...
On a conventional, non-articulated locomotive, the driving wheels are all coupled together with side rods (also known as coupling rods); normally one pair is directly driven by the main rod (or connecting rod) which is connected to the end of the piston rod; power is transmitted to the others through the side rods. [2] [3] [4]
Wheels coupled to the main/side rods, through which the power developed in the cylinders (24) is transformed into tractive power at the rails. [1] [2] [5] [3]: 28 The weight of bearings and coupling rods on the driving wheels is counterbalanced with cast-in weights to reduce "hammering" on the track when the locomotive is under way. [3]: 21
The coupling rod between those axles was 'triangular', with an additional bearing mounted on its top edge, taking the thrust of the jackshaft drive rod. Unlike most connecting rods, this allows it to be mounted in the same plane as the coupling rod bearings. This reduces the overhung lengths of the crankpins and their bending loads.
A return connecting rod, [1] [2] return piston rod [i] or (in marine parlance) double piston rod engine [2] or back-acting engine is a particular layout for a steam engine. The key attribute of this layout is that the piston rod emerges from the cylinder to the crosshead, but the connecting rod then reverses direction and goes backwards to the ...
A trunk engine locates the connecting rod within a large-diameter hollow piston. This "trunk" carries almost no load. The interior of the trunk is open to outside air, and is wide enough to accommodate the side-to-side motion of the connecting rod, which links a gudgeon pin at the piston head to an outside crankshaft.
The heavy central V coupling rod and closely set paired motors of the E.330 were replaced by two motors set either side of the transformer and control gear, and with a lighter rod drive in order to reduce Hammer blow, using lighter rods and a pair of jackshafts set beyond the coupled wheels. Placing the jackshafts at axle level reduced the ...
A pair of cross-heads above the cylinders transmitted the power through a pair of coupling rods, making use of a loose eccentric valve gear. [7] Locomotion No. 1 is believed to have been the first locomotive to use coupling rods to connect its driving wheels together, an approach that considerably decreased the chance of slipping. [8]