Failure of cotter joint may causes accident, so it is necessary to design cotter joint to. Permissible shear stress for the cotter material, and. Mechanical forging presses with knuckle joint partspecific motion characteristics. Design procedure of cotter joint, socket and spigot joint. For power transmission or motion transfer application we generally uses temporary joints like screwed joint, cotter joint, sleeve cotter joint, universal joint or. The failure of cotter joint may causes accident so it is necessary to design cotter joint to withstand under tension without failure. Design of temporary unit 2 design of temporary connections connections structure 2. Design of joint objective questions ies, ias, gate cotters 1. Misumi offers free cad download, short lead times, competitive pricing, and no minimum order quantity. Now this kind of cotter joint is known as a socket and spigot type cotter joint.
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. 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. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and owned by third party users. Mar 27, 2012 cotter and knuckle joints hareesha n g dept.
Machine design unit 4 design of riverted cotter knuckle. 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. Cotter gets locked because of the frictional force of the contacting surfaces. Match list i with list ii and select the correct answer using the code given below the lists. 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. During transportation variable stresses act on knuckle joint which causes failure of joint.
Failure of cotter in shear considering the failure of cotter in shear as shown in fig. Study and analysis of pin of knuckle joint in train 1ravindra s. A knuckle joint is a mechanical joint used to connect two rods which are under a tensile load, when there is a requirement of small amount of flexibility, or angular moment is necessary. Cotter joint a cotter joint is used to connect rigidly two coaxial rods or bars which are subjected to axial tensile or compressive forces. Design of various types of riveted joints under different static loading conditions, eccentrically loaded riveted joints. Cotter joint is used to connect two rods or components which are subjected to tension or compression. Design of gib and cotter joint for strap end of a connecting rod. Keywords cotter joint, design, modeling, analysi, catiav5r20, ansys r15. Knuckle joint pin starting ansys 6 the main utility window can be broken up into three areas. Cotter, knuckle joints and lever design linkedin slideshare. Chapter 7 cotter and knuckle joints machine design.
A knuckle joint is used to connect two rods which are under a tensile load. Here, catia v5 software is used to create components of knuckle joint. The locking device may be a taper pin or a set screw used on the lower end of the cotter. Apr 08, 2017 application of cotter and knuckle joint. Each cad and any associated text, image or data is in no way sponsored by or affiliated with any company, organization or realworld item, product, or good it may purport to portray. This is the model of a cotter i designed for the first time according to the design considerations from the mechanical engineering data book. Since the cotter is in double shear, therefore shearing area of the cotter 2 b t and shearing strength of the cotter 2 b t equating this to load p, we have p 2 b t from this equation.
It is not used for connecting shafts that rotate and transmit torque. Design of cotter joint animation step by step procedure. 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 for an easy adjustment. Chapter cotter and knuckle joints chapter objectives design a cotter joint for a given load to be transmitted, after assuming allowable stresses in cotter and rods.
The knuckle joint assembly consists of the following major components. In this article, i am going to publish the detailed design procedure for knuckle joint. Keys, cotter and unit 5 key, cotter and knuckle knuckle. Following are the three commonly used cotter joints to connect two rods by a cotter. Apr 11, 2020 cotter and knuckle joint part 1 mechanical engineering notes edurev is made by best teachers of mechanical engineering. This document is highly rated by mechanical engineering students and has been viewed 249 times. Explore the constraint window in inventor and assemble the ballandsocket joint.
This document is highly rated by mechanical engineering students and has been viewed 1585 times. Machine design unit 4 design of riverted cotter knuckle joints new free download as pdf file. Cotter joints are used to connect two rods, subjected to tensile or compressive forces along their. View notes ch12 from mechanical 403 at anna university chennai regional office, coimbatore. Knuckel joint is designed to allow certain motion or angle between two shafts even if they are in action, whereas cotter joit is design to facilitate the aligned shafts that rotate in same directions. Jan 07, 2018 lever design process, hand and foot lever designs, cotter and knuckle joints, thickness of cotter, slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. 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. It is usually used in connecting a piston rod to the crosshead of a reciprocating steam engine, a piston rod and its extension. Knuckle joint assembly drawing sectional front top view mechanical drafting md knuckle joint design procedure problems and questions assembly drawing of knuckle joint knuckle joint assembly drawing in hindi easy way important for polytechnic engineering student machine drawing sleeve and cotter joint socket spigot knuckle joint drawing you machine. Design of gib and cotter joint for strap end of a connecting. Knuckle joint can be classified into a large number of types based on its size, shape, specification, application and other criteria.
A knuckle joint is understood to be a hinged joint in which projection in one part. Here is the diagram showing the exploded view of knuckle joint. 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. Ch12 contents contents cotter and knuckle joints c h a p t e r n 431 12 cotter and knuckle joints 1 introduction 2 types of cotter joints 3 socket.
Design of cotter joint bending strength of materials. Dimensions can be determined using these empirical relations and the strength equations can be then used as a check. Knuckle and ballandsocket joints indian institute of. Design of cotter joint animation cotter joint assembly drawing. Cut section of socket and spigot joint 0404 hareesha n g, dsce, blore78 2 3. Design a knuckle selection from machine design book. Design procedure for the spigot and cotter joint to understand the design steps let take a question and solve it step by step.
Mechanical joints may be temporary or permanent, most types are designed to be disassembled. Knuckle joints, check out the variety of configurable, knuckle joints for industrial applications. Cotter and knuckle joints understanding engineers gallery. Cotter and knuckle joint part 1 mechanical engineering.
A cotter is a flat wedgeshaped piece of steel as shown in figure4. Knuckle joint introduction, parts and applications. Design of knuckle joint a knuckle joint is used to connect two rods which are under the action of tensile load, when small amount of flexibility or angular moment is necessary. This increases the bearing area and permits drilling while making the slots. View notes cotter and knuckle joint from none at lovely professional university. Anuj gupta introduction 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. Knuckle joint definition of knuckle joint by the free. The link drive system of the mml2 developed by schuler can be made very flexible during the design of the press. Ch12 contents contents cotter and knuckle joints c h a p t. Front and top view of knuckle joint evangelinterior. The knuckle joint is a type of joint which is used in steering system in between the steering rod and pinion of the steering gear, as the line of the action axis of both the mechanical parts are intersecting and lies in different planes, so it is. Dimensional calculations of knuckle joint assembly by using c programming for academic problem purpose article pdf available january 2018 with 7,834 reads how we measure reads.
It is a kind of hinged joint between two rods, often like a ball and socket joint. This permits design of the motion characteristics in accordance with the requirements of the parts to be. Sleeve and cotter joint, socket and spigot joint and. Cotter joint cotter joints with socket and spigot ends for circular bars slots are wider than the cotter. Apr 09, 2020 chapter 7 cotter and knuckle joints machine design, mechanical engineering mechanical engineering notes edurev is made by best teachers of mechanical engineering. The maximum permissible stresses are 55 mpa in tension. Hai friends, the team members of srmechanicalupdates09 are not responsible for any errors,omissions,or damages arising out of use of this information. Knuckle joint is yet another to join rods to carry axial force. A knuckle joint is used to connect the two rods which are under the tensile load when there is requirement of a small amount of flexibility or when angular movement is necessary. For analysis, it is intended to design the model of knuckle joint in cad software. It is uniform in thickness but tapering in width, generally on one side only. Very large torque or power can be transmitted by both but square key is often preferred. Cotter and knuckle joint cotter and knuckle joints 431 1. Sleeve cotter joint pdf the working of the cotter andsleeve and cotter and gib are shown below.
Cotter pulls the rod and socket tightly together clearance must be provided for adjustment. The parts and assembly of the knuckle joint and ballandsocket joint are shown below. Cut section of socket and spigot joint 3272012 2 hareesha n g, dsce, blore78. A knuckle joint is a mechanical joint used to c onnect two rods which are under a tensile load, when there is a requirement of small amount of flexibility, or angular moment is necessary.
The grabcad library offers millions of free cad designs, cad files, and 3d models. Cotter joint these types of joints are used to connect the end of a rod or bar to a shaft. Lever design process, hand and foot lever designs, cotter and knuckle joints, thickness of cotter, slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Sleeve cotter joint pdf the working of the cotter and sleeve and cotter and gib are shown below. Nagpur abstract the current paper presents the problem of the failure of the knuckle pin in a railway coupling due to shearing.
A cotter is a flat wedge shaped piece of rectangular crosssection and its width is tapered either on one side or both sides from one end to another for an easy adjustment. When there is a requirement of a small amount of flexibility or angular moment, knuckle joint is used. Design of cotter joint free download as powerpoint presentation. The effect of stress concentration due to the slot is neglected. Some standard proportions for dimensions of the knuckle joint are taken as. A cotter joints is a flat wedge link piece of steel of rectangular cross section which is inserted through the rods at high angle to their axes. Unit 2 design of temporary design of temporary connections. Study and analysis of pin of knuckle joint in train. Sleeve and cotter joint, socket and spigot joint and knuckle joint drawn by r. Very high tightening force due to wedge action, which prevents loosening of parts in service. Video lecture on design procedure of cotter joint, socket and spigot joint from design of cotter joint, knuckle joint,levers and offset links chapter of design of machine for mechanical. The cotter is locked in position by means of a screw as shown in fig. The effective design of mechanical device or assembly demand the predictive knowledge of its behavior in working condition. There is always axial or linear line of action of load.
A mechanical joint is a section of a machine which is used to connect one or more mechanical part to another. Now in that class we have designed what is known as knuckle joint that is the. Contents contents cotter and knuckle joints c h a p t e r n 431 12 cotter and knuckle joints 1. A knuckle joint may be readily disconnected for adjustments or repairs. Pdf dimensional calculations of knuckle joint assembly by. Manufacturers usually have a model number for each type of knuckle joint they manufacture. As seen in the assembly the knuckle joint has main four parts. Join the grabcad community today to gain access and download. Design a cotter joint subjected to a tensile load of 35 kn and a compressive load of 40 kn. Jul 17, 2016 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. Instructions the parts and assembly of the cotter joint is.
Cotter a cotter is a flat wedge shaped piece of rectangular cross section and its width is tapered either on one side or on. Ppt knuckle joint powerpoint presentation free to view. What are the practical application of cotter joint. Ch12 contents contents cotter and knuckle joints c h a.
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