# Component parts of the mechanism - Applied Mechanics

## Components of the mechanism

Mechanisms, regardless of function and design, have a common structural basis. They consist of links - bodies involved in the transformation of motion. Link - part or group of rigidly connected parts (solid link). In addition, the links can be flexible (cables, belts, chains), liquid or gaseous.

Rack - fixed link or link conventionally taken as a stationary one. The stand can be a frame, a housing, a mechanism board, etc. Relative to the rack, the parameters of movement of the mechanism (displacement, speed, etc.).

From the mobile links, depending on their location in the chain of the mechanism, the input and output links are allocated. The input link is the link to which the movement from the engine is reported, the output - the link making the movement for which the mechanism is intended. The remaining mobile links of the mechanism are called intermediate . Mechanisms can have several input and output links. For example, a vehicle differential with one input link receiving traffic from the engine has two output links connected to the rear or front wheels.

The positions of all links of the mechanism with respect to the fixed link (racks) are given by generalized coordinates - independent variables that fully and unambiguously determine the position of the mechanism. The number of generalized coordinates corresponds to the number of degrees of freedom of the mechanism. In Fig. 1.1 shows the structural diagram of a flat hinged four-link. Here 1-4 are the links; A, B, C, D - kinematic pairs. The position of the hinged four-link mechanism having one degree of freedom is completely and unambiguously determined by specifying one coordinate (angles of -

Fig. 1.1

crank gate 1 ), which you can take as a generalized coordinate.

Any independent coordinates can be taken as generalized coordinates. The link whose coordinates are selected as generalized coordinates of the mechanism is called the starting link . In most cases, it coincides with the input link. However, sometimes to simplify the analysis for the initial link it is more convenient to take an intermediate or even an output link.

The links in the mechanisms are interconnected movably. The movable connection of two adjoining links, allowing their relative motion, is called a kinematic pair . The points, lines, surfaces along which the links touch, are called kinematic pairs .

[...]

[...]

[...]

[...]

[...]

[...]

[...]

[...]

[...]

[...]

[...]

[...]

[...]

[...]

## Other services that we offer

If you don’t see the necessary subject, paper type, or topic in our list of available services and examples, don’t worry! We have a number of other academic disciplines to suit the needs of anyone who visits this website looking for help.

## How to ...

We made your life easier with putting together a big number of articles and guidelines on how to plan and write different types of assignments (Essay, Research Paper, Dissertation etc)