Lop fit 2.0 E-bike (treadmill walking E-bike) using Cero 7.0

Lopifit 2.0

INTRODUCTION

Treadmill cycle is also exercise device which is used at the time off morning for walking or running purpose, at morning time we have need of juice so we can arrange juice mixture from the wheel arrangement by using gear. We can make juice at any time when we use bicycle. Mobile is important device which any time in our pockets. So, there is need of battery charging for mobile so arrange the charging kit with bicycle which operated on treadmill cycle wheel.

The fabrication of the treadmill traveler is very advantageous because of its simple construction and easy working principle. To say in a one line, this machine follows the action of the user. That is, when the driver walks forward, the machine moves forward and when he walks backward, the machine moves backward. A treadmill setup is made so that the operator can walk on the belt. A handle is placed in the front for the controlling of the vehicle. The rollers above which the conveyor belt (treadmill belt), held in tension are coupled to the wheels of the machine, usually rear wheels. The rollers are connected by a suitable arrangement for efficient transmission of motion thus having minimal losses during the transmission of motion. The frame of the machine is designed in such a way that it is balanced and the operator doesn’t put any effort in balancing the machine. Now when the operator walks forward, the conveyor belt moves in one direction which makes the wheels of the machine to rotate so that the machine moves front. When he walks backwards, the motion direction of the belt is reversed and thus the vehicle moves backwards.

OBJECTIVE

The treadmill bicycle is a totally new way of moving. With the electric assist it takes less effort to walk then “a walk in the park”. It is the combination of the DC motor, Hall Effect Sensor and amplifier boosting your walking pace up to the higher speed. Increased use of fuel has resulted in increase of pollution and degradation of natural resources. With increasing population and their need, it has become necessary to control the use of fuel and decrease the pollution; so as to make it avail it’s important to our coming generation. Due to heavy busy schedule people are not able to give attention to their health and physical fitness. As it uses no fuel so it saves energy simultaneously it can be used as treadmill and Bicycle. No need to use it as conventional treadmill in closed room; you can roam on roads also.

Components of Lopifit :

1. Treadmill Frame design:

Frame design is done according to the tread belt size. As per space availability and clearance for reduction of friction, Frame consists of a set of rollers, in which first and last roller is for movement of belt and other are supportive rollers. Rollers are fitted in frame by means of bush.

Reasons:

1. Mild steel is readily available in market.
2. It is economical to use.
3. It is available in standard size.
4. It has good mechanical properties i.e. it is easily machinable.
5. It has moderate factor of safety, because factor of safety results in unnecessary wastage of material and Heavy selection
6. It has high tensile strength.
7. Low co-efficient of thermal expansion

Properties of Mild Steel:

M.S. has carbon content from 0.15% to 0.30%. They are easily wieldable thus can be hardened only. They are similar to wrought in properties. Both ultimate tensile and compressive strength of the steel increases with increase in carbon content. They can be easily gas welded or electric or arc welded. With increase in the carbon percentage weld ability decreases. Mild steel serves the purpose and hence selected because of above purpose

2. Rollers:

length of rollers as 500mm. To reduce the friction of belt with Frame 5 mm clearance is provided on both sides. Front roller is of diameter 60mm and that of rear one have diameter 50mm. For easy and fast movement of belt some taper should be provided to belt that’s why front roller is large in diameter and rear is in small diameter. Rollers are connected to frame by using MS rod of diameter 10 mm. PVC bush are placed in front roller and deep groove ball bearing 6000, which is use for light weight operation is used. Rear roller is directly welded to 10mm MS rod.

3. Free wheels:

In mechanical or automotive engineering, a freewheel or overrunning clutch is a device in atransmission that disengages the driveshaft from the driven shaft when the driven shaft rotates faster than the driveshaft. An overdrive is sometimes mistakenly called a free wheel.

4. Pedal Assistance Sensor:

If you turn on the motor power while riding, PAS will send a signal to make the motor work andassist you ride easier. Simply speaking, riding with pedal assistance sensor is very helpful to save your energy.

5. Belt(Nylon Rubber Fabric):

Standard material available for tread belt is nylon fabric. So we use this material for treadmill belt. Nylon rubber fabric is cheap and easily available, less in cost & having property of wear resistance.

The top side of the belt is rubber (higher quality treadmills use PVC rubber) and the underside is cotton, polyester, urethane or mono-filament.

6. Bearings:

Single row deep groove ball bearings are the most widely used roller bearing type in the world due to their versatility and overall performance. They are characterized by having deep raceway grooves in which the inner and outer rings have circular arcs of slightly larger radius than that of the balls.

7. Motor:

Motor is an electrical device which converts electrical energy into mechanical energy. In this work, the DC motor is used because they are simple, lightweight, and more rugged and requires low maintenance. The specifications of motor are : 350 watt, 36 volt, 300 rpm.

gear train model

8. Battery:

Battery is a device consisting of single or multiple electrochemical cells. This is used for supplying electric power.it has two terminals:

1. Anode, which is negative terminal
2. Cathode, which is positive terminal. The electrons travel to cathode from anode.

There are two most common types of batteries: lithium ion battery and lead acid battery. The lithium ion battery is made from lithium and lead acid consists lead. Both are suitable for storage solutions.

9. Chain:

This is a series of connected metal links that are joined together. Chains are used to transfer from one sprocket to another. A chain drive is intermediate between belt drive and gear drive. Chain drive has some characteristics of belt drive and some of gear drive. Chain drive can be used for long and short center distances. It can operate without full lubrication film between joints unlike gear drive. The efficiency of chain drive is more than belt drive. It is compact compared to belt drives.

10. Sprocket:

Sprocket is a component used to engage links of chain. One can call it a toothed wheel, with the help of chain and sprockets power transmission system can be formed. Here, there are total five sprockets of different teeth and diameter is used to obtain required speed ratio. The sprockets are made of same material as chain .

Steering fork and front wheel:

Steering fork controls the direction in which the vehicle moves and is operated by operator, which also contains the brakes and accelerator for accelerating the vehicle.

Curved fork blades can also provide some shock absorption. The purpose of this offset is to reduce 'trail', the distance that the front wheel ground contact point trails behind the point where the steering axis intersects the ground. Too much trail makes a bicycle feel difficult to turn.

wheels

Since spoke wheels are simple and durable, they can be easily repaired.No specialized equipment is needed to repair them and there are many repair service providers in the market. As compared to alloys, which do not take bumps well, spoke wheels are very well suited for rough road and off-road conditions, especially in rural areas.

Steel used to make spoke wheels is cheaper and overall, less steel is used. Its manufacturing process is simple and technology is completely mature. This makes spoke wheels cheaper to buy than alloys.

Storage cabin:

Storage cabin is essential for every vehicle to place little accessories ad items , here we use the storage to place battery and extra space is provided for keeping any belongings, with a cover for protection and mounted at rear part of the vehicle , above the wheel.

CALCULATIONS FOR ROLLER:

For diameter of the roller

Load analysis of the selected material:

Maximum applied load = human weight + body weight

Assume it as 120kg which is 1177.2N.

Maximum allowable load =1177.2N. (considering maximum weight of rider)

Length of roller = 490mm

Uniformly distributed load = load x total length

=2.4N/mm.

(Consider simply supported beam)

Where Permissible shear stress

= 0.3x tensile yield strength of steel

=180N/mm²

Maximum shear stress

=0.18 X ultimate tensile yield strength

=126 N/mm².

Bending stress factor Kb=1.5

Life load factor Kt =1

Motor specifications

Power of motor = 350W

RPM of motor=300rpm

Power (P)=2πNT/60x10>6

Motor torque= 11146.4N-mm.

Assuming the roller is simply supported beam

Maximum bending stress (Mb) at cut section=711480N-mm

From

Maximum torque relation

We get diameter= 45mm

For speed o roller:

The length of the belt is = 1.7m=1700mm

So, for one full rotation of the belt a man has to run 1.7m

If a man running at a speed 5 km/h then in one hour the belt rotates=2941 times

Here, the diameter of roller is = 45 mm

So, for each rotation of the belt one roller completes

=1777/πD

So, the speed of the belt rotation is 2824/hour=48rpm

For each revolution of belt roller rotates 13times

Speed of the roller = 13x48

=624 rpm.

Calculation of Rear wheel RPM to obtain a maximum speed of 50kmph

From realtion v=rxw

V= linear velocity

R= radius od wheel

W= angular velocity

Compound Gear train calculation:

By the relation

N1T1=N2T2

We can obtain the speed and number of teeth on sprocket.

Final assembly of Lopifit2.0

ADVANTAGES

• Simple in construction.
• Easy to fabricate.
• The components used for the fabrication are simple and easily available.
• The cost of the system is less.
• No need of separate time for exercising.
• No need of skilled operators to operate this machine.
• Less maintenance is needed.
• Compact in size.
• Less weight.
• Easily portable.
• Solar power charges the battery automatically.

DISADVANTAGES

• Not suitable for travelling longer distances.
• Not as efficient as motor driven vehicles.
• More human effort is required in order to drive the vehicle.

APPLICATIONS

These types of machines can be widely used in the fields such as,

• Fitness and gym,
• Those who are interested in evening walks.
• Automobile application.
• Two-wheeler Application.
• Light vehicles.

FUTURE SCOPE

• It can be used as an indoor locomotive device infrastructure with large roof span i.e. malls, warehouse,
• open markets, large office spaces, etc.
• By using such product pedestrian cops can save themselves from getting exhausted.
• Pedestrians in large campuses can benefits from this product the same way.
• Can replace cycle as an energy efficient vehicle for those who cannot drive a cycle.

CONCLUSION

Exercise-Treadmill bicycle helps in maintaining proper physique. Physical fitness is of utmost importance in day to day life. People often get bored while exercising in a closed room such as gym. By using treadmill bicycle one can exercise outdoors in fresh air.

Fuel saving-People often use vehicle for travelling over short distance. This causes unnecessary wastage of fuel. Due to use of treadmill bicycle over short distance a large amount of fuel can be saved.

Travelling-Treadmill bicycle can be used for travelling over short distances. One can also exercise while travelling over short distance.

Eco- friendly-Treadmill bicycle does not require any fuel. Therefore, it does not emit any pollutants. So it is an eco-friendly vehicle.