TA-202A Project

Platform Jack

Project Report 2013-14 (Second Semester) April 11, 2014

Under the enlightening guidance of

Dr. V.K.Jain at

Indian Institute of Technology Kanpur

Group Number : 27

Project Guide : Mr. Anil Kumar Jha

Name Roll Number Section

Rishabh Sahu 13575 D12

Akshay Chaturvedi 13071 D12

Aditya Sinha 13047 D12

Himanshu Rathee 13308 D12

Piyush Prashant 13476 D12

Vaibhav Yadav 13763 D12

Nilesh Sharma 13441 D12

Contents

1. Acknowledgement

2. Certificate

3. Overview

4. Functionality

5. Isometric Drawing

6. Bill of Material

7. Parts Drawing and Calculations

8. Cost Analysis

9. Future Modifications and Uses

10.Log Sheets

Acknowledgement

We are greatly indebted to our Project Guide Mr. Anil Kumar Jha for his continued support over the course of this Project. We

would like to express our gratitude to the T.A.s in the Lab for all the help they enthusiastically extended to us.

Without their moral support and inspiration we would not have

been able to complete this task. At this juncture, we would like to thank our Instructor-in-charge , Dr. V.K. Jain, for providing us an

excellent opportunity to experience real-world engineering. Lastly, we would like to thank everyone in TA Lab who helped us

at any point while doing our project .

Certificate

This is to certify that the TA202A Mechanical Lab Project, Platform Jack, is a complete and genuine work of Rishabh Sahu,

Akshay Chaturvedi, Aditya Sinha, Nilesh Sharma, Himanshu Rathee, Vaibhav Yadav and Piyush Prashant.

The Project's idea is original and does not constitute to any sort of plagiarism arising from previous works in TA202A Lab or any other

sources thereof.

Overview

Platform Jack is a very useful machine to lift very heavy objects using small force. It consists of a handle which rotates a worm. The worm in

turn rotates the worm-wheel which is connected to a driving spur gear.

This spur gear rotates four other driven spur gears which have threading on the inner side. The spur gears by their threading convert the rotational

motion to the lifting action which lifts the base plate.

The lifting force is very high in comparison to the force applied on the handle due to added mechanical advantages of various components of

machine.

Functionality Platform Jack is mainly designed to lift very heavy objects by just using force of hand. It is designed in a way such that in process of converting

the rotational force given by hand to the lifting force for top plate, it adds the mechanical advantage of various simple machines used.

Step:1 Worm and Worm-Wheel

The ratio between worm and worm-wheel is 20:1. Hence, for 20 rotations of worm (or handle), the worm-wheel rotates once.

Step:2 Spur Gears

As worm-wheel and driving spur gear are connected, there is no change in force. Driving spur gear(with 60 teeth) rotates 4 driven spur gear(with 20 teeth). So, for every rotation of driving spur gear the driven spur gear rotates 3 times.

[Here, we deliberately decided to lose some mechanical advantage because machine was starting to seem as really slow.]

Step:3 Screw Mechanism

Mechanical advantage of screw is added here. For every rotation of driven spur gear, the screw translates by 2mm.

Future Modification and Uses

Platform Jack can be very useful in industries and places like construction sites for lifting heavy objects as it provides a very large mechanical

advantage. Doing very minor changes will change this from just lifting using a platform to lifting using cable without affecting its mechanical

advantage. It can also serve as a replacement for Hydraulic Jacks in places where low maintenance is a priority.

Considering its future modification, one aspect, which is the strength, is at top priority. The machine should be able to withstand the weight it is required to lift smoothly. Another modification which will increase the

flexibility of machine can be the changeable radius of the handle. As the mechanical advantage depends upon the radius of handle, it can be

changed by changing the latter giving the machine added flexibility over relationship between speed and mechanical advantage.

Calculation of overall Mechanical Advantage-

Let the radius of handle be R.

To lift a load by 2mm (Output=2mm),

Handle has to be rotated 20/3 times.

Hence, Input= (2XXR)x20/3

Mechanical advantage = Input(in distance)/Output(in distance)

=(2XXR)x20/3(in mm)/2

= 20xXR/3(in mm)

Cost Analysis

Material Cost/Kg Volume/Qty Total Cost

Mild Steel Rod 75/kg 7.3 kg 547

Mild Steel Angle 50/kg 0.2 kg 10

Mild Steel Plate 65/kg 1.6 kg 108

Nuts And Bolts 85/kg 0.2 kg 17

Machine/Labor

Cost Per Unit

Working

Time

Total Cost

Lathe 250 per hour 10 hrs 2500

Milling 350 per hour 5 hrs 1750

Drilling 100 per hour 2 hrs 200

Unskilled 250 per day

(8 hrs) 21 7

4594

Skilled

350 per day

(8 hrs)

21

920

All costs are in Indian Rupees. Total Cost : Rs. 10646

Bill of Materials

Part Number

Part Name

Quantity

Material Required

Cost

1 Worm 1 MS Rod 25x27 16.9

2 Worm-Wheel 1 10.5

3 Driven Spur Gear

4 MS Rod36x12 62.5

4 Driving Spur Gear

1 MS Rod100x12 119.8

5 M16 Rod 4 MS Rod16x160 163.2

6 V-Plate 2 MS Sheet 8.3

7 V-Support Block

4 MS Rod12.7x12 7.6

8 L-Support 2 MS Angle 10.6

9 Top Plate 1 MS sheet5mm150x150

30.9

10 Base Plate 1 MS sheet5mm150x150

55.2

11 Pin 1 MSRod12.7x65 10.2

12 Legs 4 MS Rod20x100 159.3

WORM Outside Diameter of Worm= 22mm

Pitch of Single Start Worm=4.7mm

Depth of worm Tooth=0.6866*pitch=3.2270mm

All dimensions in mm.

Part Number Part Name Quantity Material Req 1 Worm 1 MS Rod

25x27

-RishabhSahu

WORM GEAR Diameter of wheel over sharp edges= 2r(1-cos /2)+Do=64.135mm

Throat Diameter of Wheel=D+2a= 62.8342mm

Ratio of Worm and Worm Wheel=20:1

Face width of Wheel= 2.38xPitch+6.35=17.35mm

Helix Angle of Worm=tan w=d/Lead=12.6988

w=85.49o

Gashing angle of Worm Wheel=90- w=4o31

All dimensions in mm.

Part Number Part Name Quantity Material Req 2 Worm Gear 1 x

-Rishabh Sahu

DRIVEN SPUR GEAR

Module=1.5

Number Of Teeth= 20

Addendum = Module =1.5

Dedendum = 1.157 Module= 1.7355mm

Working Depth = 2 Module =3mm

Whole Depth = 2.157 Module =3.2355mm

Outside Diameter = Module (Teeth + 2) =33mm

Part Number Part Name Quantity Description 3 Driven spur

Gear 4 MS Rod

36x12 All dimensions in mm. -Aditya Sinha

DRIVING SPUR GEAR

Module=1.5

Number Of Teeth= 60

Addendum = Module =1.5

Dedendum = 1.157 Module= 1.7355mm

Working Depth = 2 Module =3mm

Whole Depth = 2.157 Module =3.2355mm

Outside Diameter = Module (Teeth + 2) =93mm

Part Number Part Name Quantity Description

4 Driving Spur Gear 1

M.S. Rod 100x12

All dimensions in mm. Aditya Sinha

M16 THREADED ROD

Part Number Part Name Quantity Description 5 Threaded Rod 4 MS Rod

16x160 All Dimensions in mm.

-Vaibhav

V-PLATE SUPPORT BLOCK

All dimensions in mm.

Part Number Part Name Quantity Material Req 7 Legs 4 12.7x12

-Akshay Chaturvedi

TOP PLATE

All dimensions in mm.

Part Number Part Name Quantity Description 9 Top Plate 1 MS sheet

5mm 150x150 -Himanshu Rathee

BASE PLATE

Part Number Part Name Quantity Description

10 Base Plate 1 M.S. Sheet

5mm 200X200

PIN

Part Number Part Name Quantity Material Req 11

Pin 1 MS Rod 12.7x65

All dimensions in mm.

-Akshay Chaturvedi

LEGS

All dimensions in mm.

Part Number Part Name Quantity Material Req 12

Legs 4 20x100

-Akshay Chaturvedi

TA final (To be Printed)final part 1final part2abstractCost Analysis

PartTo Be printedWORMWORM GEARDriven spur gearDRIVING SPUR GEARM16 THREADED RODVTOP PLATEBASE PLATEPINLEGS

Model complete