Cotter joint a cotter joint is a temporary fastening and is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces and not in rotation. This joint has better strength compared to the socket and spigot cotter joint. Gib and cotter joints are used for rods of square or rectangular cross section. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Machine design multiple choice questions and answers pdf free download,objective type interview questions and answers,lab viva,online quiz,bits,test. So normally these are the different kinds of joints which uses cotter. 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. All components of the joint are assumed to be of the same material. 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. Sleeve has two slots where two cotters are placed in different slots and going through. Gibandcotter joint article about gibandcotter joint. A gib and cotter joint is usually used in strap end or big end of a connecting rod. In order to find out various dimensions of the parts of a cotter joint, failures in different parts and at different xsections are considered. A mechanical joint is a section of a machine which is used to connect one or more mechanical.
Cotterjoints and pin joints are used for rods in tensile or compressive. Cotter joint has mainly three components spigot, socket and cotter as shown in figure 9. Rods may be of different cross sections like circular or square. 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. Gibhead is a taper key is usually provided with a head, called a gibhead, to facilitate its removal. This joint is used to join two rods of square or rectangular in cross section. Appropriate slots are cut in the sleeve and in the cylindrical rods. Autocad mechanical practice drawings pdf free download autocad exercise book. Sleeve type cotter joint to connect two shafts 25 mm eehand orthographic views of. Types of cotter joints socket and spigot cotter joint, sleeve and cotter joint, and gib and cotter joint.
A joint in timber construction, formed with a steel strap tightly drawn in position by steel clips and wedges explanation of gibandcotter joint. What are the practical application of cotter joint. Unit2 keys splines socket and spigot cotter joint sleeve and cotter joint gib and cotter joint knuckle joint. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. Rods, having axial tensile or compressive forces are connected by cotter joints. Jun 03, 2017 a cotter joint b bolted joint c kunckle joint d universal coupling e gib and cotter joint. Instructions the parts and assembly of the cotter joint is. A cotter is a pin or wedge passing through a hole to fix parts tightly together. Cotter joints may be used in areas subject to corrosion during operation, resulting in difficulty in turning rusty bolts and nuts of threaded connections.
Cotter joint is widely used to connect the piston rod and cross head of the steam engine, so as a joint between the piston rod and the tailor pump rod, foundation bolt etc. A joint in timber construction, formed with a steel strap tightly drawn in position by steel clips and wedges explanation of gib and cotter joint. In this excerpt, he explains the jointbyjoint concept. Cotter joint is widely used to connect the piston rod and cross head of the. Friction at the edges between the socket holes and the cotter.
In british usage cotter pin has the same meaning, but in the u. Gray produced the idea, and michael brought it to the masses. Gib is likely a cotter but with two gib heads at its ends. Coaxial holes are provided in the fork end, eye end and. The rods may be subjected to a tensile or compressive load. What is a cotter joints a cotter is a flag wedge shaped piece of steel. In a socket and spigot cotter joints, one end of the rods is provided with a socket type of. Cotter joint is used to connect two rods or components which are subjected to tension or compression. All the above parts can be visualized if you take a look at the exploded view shown below. Most mechanical joints are designed to allow relative movement of these mechanical parts of the machine in one degree of freedom, and restrict. Consider a gib and cotter joint for square rods as shown in fig. It contains a sleeve and two wedge shaped tapered cotters.
So gib is very useful member in that kind of joint. Sleeve cotter joint pdf the working of the cotter and sleeve and cotter and gib are shown below. Sleeve and cotter joint is a type of joint used to typically connect two similar coaxial cylindrical rods. Nov 07, 2009 cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. Cottered joint article about cottered joint by the free. Knuckle joint is named so because it is free to rotate about the axis of a knuckle pin. Cotter joint is used to connect two rods subjected to axial tensile or compressive loads. This is the simplest form of cotter joint used for fastening the two circular rods. Keys a key is a machine element that is used to connect the transmission shaft to rotating machine element like pulley, gear, sprocket, flywheel to prevent relative motion. Jan 08, 2011 gib and cotter joints are used for rods of square or rectangular cross section. This increases the bearing area and permits drilling while making the slots. Knuckle joint introduction, parts and applications. 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. The cotter is usually made of mild steel or wrought iron.
Free body diagram of forces acting on three components of the cotter joint socket, cotter and spigot are shown in figure 9. Design of gib and cotter joint for strap end of a connecting rod. The end of one rod is forged in the from of a fork or strap. Cotter joint piston tension physics free 30day trial. Cotter joint article about cotter joint by the free dictionary. Java project tutorial make login and register form step by step using netbeans and mysql database duration. There are a three types of cotter joint 1 socket and spigot cotter joint 2 sleeve and cotter joint 3 gib and cotter joint. Here instead of a socket arrangement, a sleeve is used. Design of gib and cotter joint for strap end of a connecting. Design of various types of riveted joints under different static loading conditions. 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. A cotter joint is a simple and compact connection and is easily assembled and disassembled. A cotter is driven tightly through the slots in the rods which are kept slightly mis aligned. Cotter joints are used to connect two rods, subjected to tensile or compressive forces along their.
The taper varies from 1 in 48 to 1 in 24 and it may be increased up to 1 in 8, if a locking device is provided. A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another. Nov 29, 20 the variou s proportions of the joint as per empirical relations are. Joint pdf calculation example 1 consider random variables x,y with pdf fx,y such that fx. Gib and cotter joint and its design engineers gallery. Following are the three commonly used cotter joints to connect two rods by a cotter. Spigot is formed on one of the rods and socket is formed on the other. What are the applications of sleeve and cotter joint answers. The cotter is locked in position by means of a screw as shown in fig. The cotter has uniform thickness and the width dimension is given a slight taper. Cotter joint uses one or two cotters to connect two rods rigidly transmitting forces and motion, with no rotation of the rods 3.
Common tree felling accidents and what you can do to prevent them duration. In a sleeve and cotter joint, the cut slots are always made a little bit wider than the width of the cotters in order to promote wedging action of the cotters over the slots. A joint in which a cotter, usually a flat bar tapered on one side to ensure a tight fit, transmits power by shear on an area at right angles to its length explanation of cottered joint. The center for urban agriculture recommended for you. Cotter joints use a transverse wedge with cylindrical or conical surfaces, and a longitudinal wedge. Gibandcotter joint article about gibandcotter joint by. This cotter joint is also used to connect circular rods. Some of the parts are a bit more challenging than others, but none of them are meant to be difficult. It is usually used in connecting a piston rod to the crosshead of a reciprocating steam engine, a piston rod and its extension as a tail or pump rod, strap end of connecting rod etc.
See all design to learn to design and assemble the parts in diff ways and methods. Typical applications are in fixing a crank to its crankshaft, as in a bicycle, or a piston rod to a crosshead, as in a steam engine. What are the applications of sleeve and cotter joint. A cotter is a flat wedge shaped steel piece of rectangular crosssection and its width is tapered either on. Sleeve cotter joint pdf the working of the cotterandsleeve and cotterand gib are shown below.
What was very likely the most influential concept in physical training in the past five years occurred during a casual conversation between gray cook and michael boyle. Socket and spigot cotter joint, sleeve and cotter joint, and gib and cotter joint. The continuous case is essentially the same as the discrete case. Gib and cotter joint creo part design and assembly. Feb, 2018 java project tutorial make login and register form step by step using netbeans and mysql database duration. Mechanical engineeringmachine design mcq pdf all exam.
Cotter joints, socket and spigot joint, sleeve and cotter joint gib and cotter joint, knuckle joint. Mechanical joints may be temporary or permanent, most types are designed to be disassembled. Autocad mechanical practice drawings pdf free download. Gib goldline bullnose external 90 degree corner trim gib slim angle standard gib slim angle off angle gib slim arch bead gib stopping angles gib stopping beads gib casing beads gib shadowline stopping bead gib metal trim control joint p35. The various design equations for cotter joints design were put. A socket is formed by expanding the end of one rod in which the spigotend of the other rod is inserted. A gib is used along with the cotter to make this joint. Split nut is a locking device in which a one smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming b a slot is cut partly in middle of nut and.
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