Stop (mechanics)
A stop is the intended end point of the path of movement of a body. At this point, the body "strikes" another body - a physical obstacle that is itself called a stop . Both bodies together form half of a form fit , i.e. H. that the impacting body can leave the stop in the opposite direction.
Stops can be found in a variety of moving mechanical structures: Framework for gates , doors , and windows , stops for trolleys and booms of cranes , bumpers for vehicles, installation of a bar tab of a stock rail in a rail switch u. v. a. The stop is fixed, but can also be adjustable such. B. often on machine tools . On a lathe , the drive for advancing the tool slide is automatically disabled when the set stop is reached. On table saws is to the intended width of a board on a guide bar on, (at which one runs along the too wide board applies ).
Parts that are assembled to form machines and devices are often provided with stops with the help of which they are positioned against one another. On the other hand, the forces that occur during use are transmitted via the stop surfaces. One example is a thickening ( collar ) on a shaft against which a wheel is pushed and via which an axial force acting between the shaft and the wheel is transmitted. A screw is usually screwed or inserted into a part until its head rests in a ring on the part and an axial force is transmitted between the two.
Individual evidence
- ^ Siegfried Hildebrand : Feinmechanische Bauelemente, 5.3.2. Attacks, Hanser 1968, pages 690 to 700