3 Speed Gearbox Mechanism

Gearboxes or also commonly called gear reducers or enclosed speed reducers are used on many electromechanical drive systems. Gearboxes, are essentially multiple open gear sets contained in a housing. The housing supports bearings and shafts, holds in lubricants, and protects the components from surrounding conditions. Gearboxes are available in a wide range of load capacities and speed ratios.

The purpose of a gearbox is to increase or reduce speed. As a result, torque output will be the inverse of the speed function. If the enclosed drive is a speed reducer (speed output is less than speed input), the torque output will increase; if the drive increases speed, the torque output will decrease. Gearbox designs are classified as either bevel designs, where gears are perpendicular to each other, or spur designs, where two gears rotate parallel to each other.

The 3 Speed Gearbox presents the mechanism of a gearbox. Gears of various dimensions are placed along the x and y axis. A motor rotates the central shaft and different arrangements that can be made in the project causes the rotational motion to transfer from one axis to other. The project is mainly made from Mdf, mild steel and Acrylic. The machine can be divided into 4 groups of gears. Each group consists of 4 gears of different dimensions. The machine works in 3 different scenarios.

In scenario 1, the central shaft is held together by a coupler. The rotational motion starts from the motor and transfers to the group 1 gears and from there, with the help of the coupler transfers to group 3 gears. In this scenario, the group 2 & 4 gears are disengaged. In scenario 2, the coupler & the group 4 gears are disengaged. The rotational motion starts from the motor and transfers to group 1 gears and from there via group 2 gears transfers to group 3 gears.

In scenario 3, the coupler & group 2 gears are disengaged. The rotational motion which starts from the motor transfers to group1 gears and from there transfers to group 3 gears via group 4 gears. The transfer of motions between groups of gears is possible due to proper meshing of biggest gears present in group 1 & 3 and smallest gears present in groups 2 & 4

IMPOSSIBLE AND LAW OF COMPLEMENT THEOREM.

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WHAT IS PROBABILITY AND THEIR TYPES

PROBABILITY:

               In case of engineering statics we take a probability definition for this type.

                             

        "probability is define as predict to happening something"




for  example :IT WILL RAIN TODAY

probability are generally two types :

1. experimental
2. theoretical

here we discussed today experimentally probability in very briefly so please read full to clear your concept.


EXPERIMENTAL:

                                   An operation which can produced same well -defined outcomes is called experiment.


RANDOM EXPERIMENT:


                                   An experiment in which all possible outcomes at known and the exact output presided in advance is called random experiment.



SAMPLE SPACE:


                                   When we perform an experiment then the set S of all possible outcomes is called sample space.e.g

                            S={H,T}



EVENT:


              Any subset of a sample space is called an event


                               P(E)=NUMBER OF FAVORABLE OUTCOMES  /  TOTAL NUMBER OF POSSIBLE OUTCOMES



 EQUALLY LIKE EVENTS:

             
               Two events A and B are said to be equally likely events when one events is has likely to occur as the other.



MUTUALLY EXCLUSIVE EVENTS:


             Two events A and B of a single experiment are said to be mutually exclusive events or disjoints sets if and if only if they can not both occur at the same time that is They have no points in common.


               AnB=O



EXHAUSTIVE EVENTS:

                       
               Is that their union must cover all the events with in the bentire sample space .For example events A and B are said to be collectively exhaust it


             AuB=S










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