Mechanisms
Mechanisms which are devices designed to transform input forces and movement into a desired set of output forces and movement can be classified according to the use of them. Kinematic pairs are one common type of mechanism used in machines. Generally, a kinematic pair is a connection between two bodies that enforces constraints on their relative movement. Kinematic pairs are also classified into to types. Lower pairs and higher pairs. Lower pairs are joints that constrains contact between two points. is where a surface occuts contact between two members. Higher pairs are constraints that requires a curve or surface in the moving body to maintain contact with a curve or surface in the fixed body. Another type of mechanism are gears and gear trains. Gears are rotating machine parts which have cut teeth in order to transmit torque. Gear trains are formed by mountin gears on a frame so that the teeth of the gears engage. simple gear trains are used to transmit rotary motion. Another type of mechanism is the cam and follower system. A cam and follower system is a mechanism that uses a cam and follower to create a specific motion. The cam is in most cases a flat piece of metal that has unusual shape or profile machined onto it. The movement of the follower is then transmitted to another mechanism or another part of the mechanism.
Mechanisms which are devices designed to transform input forces and movement into a desired set of output forces and movement can be classified according to the use of them. Kinematic pairs are one common type of mechanism used in machines. Generally, a kinematic pair is a connection between two bodies that enforces constraints on their relative movement. Kinematic pairs are also classified into to types. Lower pairs and higher pairs. Lower pairs are joints that constrains contact between two points. is where a surface occuts contact between two members. Higher pairs are constraints that requires a curve or surface in the moving body to maintain contact with a curve or surface in the fixed body. Another type of mechanism are gears and gear trains. Gears are rotating machine parts which have cut teeth in order to transmit torque. Gear trains are formed by mountin gears on a frame so that the teeth of the gears engage. simple gear trains are used to transmit rotary motion. Another type of mechanism is the cam and follower system. A cam and follower system is a mechanism that uses a cam and follower to create a specific motion. The cam is in most cases a flat piece of metal that has unusual shape or profile machined onto it. The movement of the follower is then transmitted to another mechanism or another part of the mechanism.
No comments:
Post a Comment