March 2015 Archives

It is good to make cross section drawings to provide a better understanding of a complex mechanism with various mechanical components assembled by illustrating how the representative mechanical components are assembled. This section explains how to make a cross section drawing using the Bingo Machine as an example.

• The general rule is to draw the cross section that is cut at the base center line. However, you may draw the cross section that is cut at a point other than the base center line if necessary.
• When cutting at a point other than the base center line, draw a cutting line (thin dashed line) to illustrate the cutting position. ([Fig.1])
• Draw a thick solid line for both ends of the cutting line and for key points where the cutting direction changes. ([Fig.1])
• In addition, when you need to indicate the view direction of a cross section or when you make several cross section drawings separately, add an arrow and a symbol on both ends of the cutting line and include a description such as "Cross Section A - A" next to the cross section drawing. ([Fig.1])
• Note that the cross section of parts such as bolts/nuts, shafts, pins, rivets, or keys will not be drawn in longitudinal direction, in principle.

There are following two methods for separation (escapement) mechanism.
This section introduces these methods along with representative examples of the mechanism.