Week 11- Assembly Workbench

AIM - To design Quick Release Mechanism and CV Joint.

OBJECTIVES

• To design the parts of quick return Mechanism and create a assembly of it.
• To create drawings of parts , assembly of quick return mechanism.
• To design the parts of CV Joint and create a assembly out of it.
• To create drawings of parts , assembly of CV Joint.

THEORY

Quick Return Mechanism

A quick return mechanism is an apparatus to produce a reciprocating motion in which the time taken for travel in return stroke is less than in the forward stroke. It is driven by a circular motion source and uses a system of links with three turning pairs and a sliding pair.

Applications

• Shaper
• Mechanical Actuator
• Power Driven Saw
• Screw Press

CV Joint

Constant-velocity joints allow a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. They are mainly used in front wheel drive vehicles. Modern rear wheel drive vehicles with independent rear suspension typically use CV joints at the ends of the rear axle halfshafts and increasingly use them on the drive shaft.

Assembly Modelling

Assembly modeling represents the structure of a designed product and consists of using components to group geometric entities in hierarchies. Assembly modeling is commonly used in Mechanical Computer-Aided Design applications, it simplifies the design of complex products containing thousands or millions of geometric entities.

There are two main ways to design mechanical products: top-down and bottom-up approaches.

With bottom-up approach users start to design a product by detailing its low-level component. These components are then grouped into higher-level components. The process is continued until the very top component is corresponding to the product itself.

With top-down approach users start to design a product by defining but not detailing its first-level components. Each component is then refined in more detail by defining its sub-components. The process is continued till all low-level components are defined and detailed.

MAIN CONTENT

Quick Return Mechanism

Parts

Base

Slotted Lever

Swinging Arm

Slider

Cylindrical Slider

Assembly

Drawings

CV Joint

Parts

Main Body

Circular Cross

Cap

Assembly

Drawings