What is difference between key and cotter?
Keys are usually driven parallel to the axis of the shaft that are subjected to torsional motion. Cotters are normally driven at right angles to the axes of the connected parts.
What is cotter joint and knuckle joint?
A cotter joint, also known as a socket and spigot joint, is a method of temporarily joining two coaxial rods. One rod is fitted with a spigot, which fits inside a socket on one end of the other rod. Slots in the socket and the spigot align so that a cotter can be inserted to lock the two rods together.
Where are knuckle joints used?
Knuckle joints are often used to connect rods subjected to tension in structures such as roof ties, bridges, and cranes. The links of a chain are also considered a series of knuckle joints. Simplicity means that knuckle joints are easily manufactured while being strong and rigid under tension loads.
Which is an example of a knuckle joint?
A knuckle Joint is a mechanical component that is used to join the two components under tensile loads. It is also known as the Forked pin joint. For example Tractor and trolley. The trolley is being attached to the tractor with the help of a knuckle joint.
What is key joint?
A key joint is a pre-manufactured device used to create control joints in concrete structures. To minimize cracks associated with concrete shrinkage, builders place control joints at specific intervals along the concrete.
What are the types of keys?
There are broadly seven types of keys in DBMS:
- Primary Key.
- Candidate Key.
- Super Key.
- Foreign Key.
- Composite Key.
- Alternate Key.
- Unique Key.
Is knuckle joint and Universal Joint same?
Used in angular power transmission between shafts. It can be seen in-between the the propeller shaft & the gear box and also between the Crown and propeller shaft, in Heavy Commercial Vehicles and other Front-Engine Rear Wheel Drive Vehicles.
What is the difference between knuckle joint and universal joint?
Solution) The chief advantage of the universal joint over knuckle joint is its flexibility. The joint can serve the shafts which do have angular misalignment. It is cheap as well as cost effective too.
Why is knuckle joint used?
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.
What are the advantages of knuckle joint?
Advantages of knuckle joint
- Knuckle joint can withstand large tensile loads.
- It has good mechanical rigidity.
- Also, it is simple to manufacture and set up.
- It can be easily assembled and dismantled.
- Design is simple and easy.
- Fewer parts are less costly and more reliable.
- It can permit angular movement between rods.
What are the parts of knuckle joint?
Knuckle Joints -Parts And Functions
- Two rods which are to be connected.
- Eye end.
- Double Eye End or Fork End.
- Knuckle Pin.
- Collar.
- Taper Pin or Lock Pin or Split Pin.
What is the disadvantage of keyed joint?
Too much securely fixed keyed joint might become difficult to dismantle. Causes shaft imbalance. They introduce stress points due to the notch effect and reduce shaft strength. Possible axial displacement of hub unless locked by an extra component such as circlip or set screw.
What are the applications of knuckle joint?
The applications of Knuckle Joint is as follows. Knuckle joint is mostly used in the Automobile to connect the propeller shaft when two shafts are not straight to each other. Knuckle joint is used as the Tie rod joint of the jib crane. It is used as the Link of roller chain.
How to design cotter joints?
Design Procedure for Cotter Joint is Made to Calculate: 1 The diameter of each rod 2 Design of Single eye and double eye. 3 The thickness of the cotter by an empirical relationship 4 The diameter of the spigot on the basis of tensile stress 5 Shear failure 6 Crushing failure of spigot etc. More
What is the use of taper pin in knuckle joint?
The pin is used to hold one eye end of a rod and the fork end of the other rod firmly. Now, the Coller is placed exactly on the surface of the rod having a hole such that the Taper pin can be inserted into it. Thus the assembly of Knuckle Joint can be done.
What is the difference between cotter key and square key?
Keys, Cotter and Flat key or rectangular keyFigure 5.1(d) and square key Figure 5.1(f) are essentially Knuckle Joints same and used universally between shaft and any mating part like gear and pulley. Very large torque or power can be transmitted by both but square key is often preferred for equal strength in shear and crushing.