Forklift Transmission - Using gear ratios, a gearbox or transmission supplies speed and torque conversions from a rotating power source to another machine. The term transmission means the entire drive train, together with the prop shaft, clutch, final drive shafts, differential and gearbox. Transmissions are more commonly used in vehicles. The transmission changes the output of the internal combustion engine so as to drive the wheels. These engines have to work at a high rate of rotational speed, something that is not suitable for slower travel, stopping or starting. The transmission increases torque in the process of reducing the higher engine speed to the slower wheel speed. Transmissions are also used on fixed equipment, pedal bikes and wherever rotational torque and rotational speed require change.
There are single ratio transmissions which function by changing the speed and torque of motor output. There are many various gear transmissions with the ability to shift between ratios as their speed changes. This gear switching could be done automatically or manually. Reverse and forward, or directional control, could be supplied also.
In motor vehicles, the transmission is usually connected to the crankshaft of the engine. The transmission output travels via the driveshaft to one or more differentials and this process drives the wheels. A differential's main function is to be able to alter the rotational direction, though, it could also provide gear reduction as well.
Power transmission torque converters as well as other hybrid configurations are other alternative instruments used for torque and speed adaptation. Traditional gear/belt transmissions are not the only machinery offered.
The simplest of transmissions are simply called gearboxes and they provide gear reductions in conjunction with right angle change in the direction of the shaft. Every so often these simple gearboxes are utilized on PTO machinery or powered agricultural equipment. The axial PTO shaft is at odds with the normal need for the powered shaft. This particular shaft is either vertical, or horizontally extending from one side of the implement to another, depending on the piece of equipment. Snow blowers and silage choppers are examples of much more complicated machines which have drives providing output in several directions.
In a wind turbine, the type of gearbox used is much more complex and bigger than the PTO gearbox utilized in farming equipment. The wind turbine gearbos converts the high slow turbine rotation into the faster electrical generator rotations. Weighing up to quite a few tons, and based upon the size of the turbine, these gearboxes generally contain 3 stages so as to achieve an overall gear ratio beginning from 40:1 to more than 100:1. So as to remain compact and to distribute the massive amount of torque of the turbine over more teeth of the low-speed shaft, the initial stage of the gearbox is normally a planetary gear. Endurance of these gearboxes has been a concern for some time.
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