A cotter is a flat wedge shaped piece of rectangular cross section and its width is tapered either on one side or on both sides from one end to another. Here is the diagram showing the exploded view of knuckle joint. Assemble the parts by using the tools edit and save if necessary. What are the practical application of cotter joint. It is essential to properly install a cotter pin it can mean the difference between.
The parts and assembly of the cotter joint is shown below. The stress is also less than the permissible stress of the material. To lock rotation of the end piece with double joint, push the cotter pin c through the hole until it snaps into place. Before going into detailed steps to design the dimensions of the knuckle joint, it is essential to get oriented with all its components and their functions. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. The taper varies from 1 in 48 to 1 in 24 and it may be increased to 1 in 8 if locking is provided.
Cotter joint is used to connect two rods subjected to compressive or axial tensile loads. This paper presents a theoretical model and a simulation analysis of bolted joint deformations. Sleeve and cotter joint, socket and spigot joint and. Solidworks cotter joint assembly design tutorial with details. A design procedure of cotter joint cotter joint introduction before going into detailed steps to design and find dimensions of cotter joint, it is necessary to understand clearly the various components, their functions and assembly of cotter joint. You are advised to draw similar assemblies for saddle key and key on flat. Keys are machine elements used to prevent relative rotational movement between a shaft and the parts mounted on it, such as pulleys, gears, wheels, couplings, etc. Autocad mechanical practice drawings pdf free download autocad exercise book. From this it is clear that the design of cotter joint is safe for 50kn as there is minimum acceptable deflection. What is the difference between cotter joint answer sahil knuckle joint is used to connect two rods whose axes either coincide or intersect and lie in one plane, which are subjected to transmit axial tensile force on other hand cotter joint is used to connect two coaxial rods, which are subjected to either axial force or axial compressive.
Knuckle joint introduction, parts and applications. Instructions the parts and assembly of the cotter joint is shown. Rods may be of different cross sections like circular or square. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces.
Manufacturing method of cotter joint copy free download as powerpoint presentation. Cotter and knuckle joint part 1 mechanical engineering. Sir, what do you mean by fs in the knuckle joint assembly drawing. The assembly consists of inserting the spigot end into the socket end and putting the cotter into their common slot. The first step in analysing any machine assembly using fem package is to draw a solid model 5. Make a movie to show the locking condition using drive constraints. The assembly and dismantling of parts of the cotter joint is quick and simple. Cotter joint is widely used to connect the piston rod and crosshead of a steam engine, as a joint between the piston rod and the tailor pump rod. Some of the parts are a bit more challenging than others, but none of them are meant to be difficult. The knuckle joint is a type of joint which is used in. Cotter joint uses one or two cotters to connect two rods rigidly transmitting forces and motion, with no rotation of the rods 3. Cotter joint is widely used to connect the piston rod and crosshead of a steam engine, as a joint between the piston rod and the tailor pump rod, foundation bolt etc. This document is highly rated by mechanical engineering students and has been viewed 249 times. Cotter joint is widely used in application in automobiles and other field.
Knuckle joint design procedure problems and questions assembly drawing of knuckle joint knuckle joint assembly drawing sectional front top view mechanical drafting md machine drawing sleeve and cotter joint socket spigot knuckle joint drawing you solved 2 shear loading of bolt given the knuckle joint machine drawing btau305 sunil. Standard, straight cotter pins, also called split cotter pins, have two straight prongs that are spread apart to keep other fasteners, such as bolts and nuts, in place. Join the grabcad community today to gain access and download. The modelling of the knuckle joint is done using 3d software. Cotter joint in solidworks, sketch, 3d model and its assembly, only for education purpose here is an animation video for cotter joint assembly explod. All the above parts can be visualized if you take a look at the exploded view shown below. Cotter joint assembly 3d cad model library grabcad. The end of one rod is forged in the from of a fork or strap. P load on the joint or pull acting on rods, d diameter of the rod, d1 outer. A cotter is a flat wedgeshaped piece of steel which is used to connect rigidly two rods which transmit motion in the axial direction tensile or compressive forces without rotation.
Use contact solver follow the parametric relations given. Result thus the 3d assembly of the knuckle joint has been created on the software catia v5 with accurate dimension and with all respects. What is a cotter joints a cotter is a flag wedge shaped piece of steel. Assembly and removal of these joints are easy as they are simple in shape. It is not at all suitable to connect rotating shafts which transmit torque. Coaxial holes are provided in the fork end, eye end and. Repeat steps d and f to release the lower ball joint and rem assembly. The source code in c basic programming language is employed in this paper to calculate dimensions of knuckle joint assembly by providing some input parameter. Autocad mechanical practice drawings pdf free download. The grabcad library offers millions of free cad designs, cad files, and 3d models. Open the assembly part then open the all parts one by one.
If joint leaks at low pressure, carefully disassemble joint and identify problem. A cotter joint is a temporary fastening and is used to connect rigidly two co axial rods or bars which are subjected to axial tensile or compressive force. Cotter and knuckle joints understanding engineers gallery. Installing a cotter pin prevents parts from backing out of or slipping off other parts. Instructions the parts and assembly of the cotter joint is. Cotter joint the cotter joint offers the following advantages. Cotter is flat wedge shape piece of rectangular cs and width is tapered either one side or both side from one end to another for an easy adjustment. Rods, having axial tensile or compressive forces are connected by cotter joints. Most mechanical joints are designed to allow relative movement of these mechanical parts of the machine in one degree of freedom, and restrict movement in one or more others. Figure 1 shows the parts of a keyed joint and its assembly. A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another. The cotter is usually made of mild steel or wrought iron.
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