Designing Of a Manually & Automatic Operated Screw Jack
Designing Of a Manually & Automatic Operated Screw JackIn this current presentation we are going to discuss the design a screw jack which can be operated manually and automatic as well.Our main goal to achieve is, to design a light weight screw jack which can uplift a Weight upto 3 tonnes.Why we considered it to be lightweight &automatic?The jack could be operated easily without AGE & GENDER consideration.Why the need of adding manual option?The difficulty in providing a power source at each circumstances let us to add the manual optionInnovation: Automatic(era) & Internal and External threaded Screw
SCREW JACKA screw jack is a portable device consisting of a screw mechanism used to raise or lower the load.
Principle: The screw jack works is similar to that of an inclined plane.
Dc working principle: d.c motor is coupled with the screw jack by gear arrangement. The screw jack shafts rotation depends upon the rotation of D.C motor.The D.Cmotor shaft is connected to the spur gear. If power is given to the D.C motor, it will run so that the spur gear also runs to slow down the speed of the D.C motor.
Types of jacks- A hydraulic jack consists of a cylinder and piston mechanism. The movement of the piston rod is used to raise or lower the load. Mechanical jacks can be either hand operated or power driven.
Material propertiesS. NO.PARTSMATERIALSPECIFICATION1)ScrewPlain carbon steel 30C8Syt =400MPa Sut =550MPad=36mm dc=30mm p=6mm2)BearingChrome stainless steelSyt =300MPa Sut =445MPaISO104-1133523)GearAISI 4340 normalised steelt=12 module=2.5 T=504)Lower FrameHard cast steel 5)Upper FrameSyt =485MPa Sut =275MPaASTM A27 grade 70
SCREW
DESIGNING OF NUT
Specification of BEARING
SPECIFICATION OF GEARBall Bearing(axial-loading)Chrome stainless steelSyt =300MPa Sut =445MPaTotal height=12.5mmInternal dia=36mmExternal di=50mm
Spur gear-Trapezoidal profileTotal no. of teeth=46Addendum dia=115mmClearance=1mmDedundum dia=105mm
Handle
Analysis of bearing
Power calculation for automatic
PARTS OF THE LIFTING JACK IN EXPLODED VIEW
MOTION ANALYSIS OF THE LIFTING JACK
MAGNITUDE OF STRESSES INDUCED
DISPLACEMENT OF DIFFERENT PARTS
EQUIVALENT STRAIN
UNDER THE GUIDANCE OFDr KALYAN KUMAR SINGH
GROUP MEMBERSAbhishek Kumar15JE001459Akshay Mandwale15JE000968Sachin Kumar15JE001463K Bharat Kumar 15JE001160Raghvendra Singh15JE001431