OPERATOR’S FATIGUE OF  HAND TRACTORS   GROUP NO :1
Hand Tractors  <ul><li>Usually used in developing countries </li></ul><ul><li>For land preparation in dry & wet conditions...
 
 
Operator’s fatigue <ul><li>During field operations hand tractors impose a greater work load on the operator </li></ul><ul>...
Important Short Comings in field Operation <ul><li>Excessive vibration feel as the hand grip </li></ul><ul><li>Uncomfortab...
 
<ul><li>Work related fatigue </li></ul><ul><li>Work related pain </li></ul>Cont…..
Hand Tractor’s Human Energy Demand <ul><li>The human energy demand in the operation of a hand tractor is influenced by </l...
How to Reduce Operator’s Fatigue??? <ul><li>A hand tractor was modified to enable operation in a seated position </li></ul...
A Hand Tractor Operator Seat should be comfortable to control; <ul><li>Steering Clutch </li></ul><ul><li>Break Clutch </li...
Other Hints for a Comfortable Seat.. <ul><li>Back support & foot rests  </li></ul><ul><li>Ensure Stability </li></ul><ul><...
 
Design of a seat Seat pan Strong enough to support the weight of an  operator up to 80kg Leaf spring Support the seat & ac...
Advantages of incorporating a Hand Tractor seat… <ul><li>Reducing Human energy consumption. </li></ul><ul><li>Reducing the...
 
 
References <ul><li>“ Operator’s Fatigue in Field Operation of Hand Tractors” V.K.Tewari , K.N.Dewangan,  published online ...
<ul><li>THANK YOU </li></ul>
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OPERATOR’S FATIGUE OF HAND TRACTORS

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  • OPERATOR’S FATIGUE OF HAND TRACTORS

    1. 1. OPERATOR’S FATIGUE OF HAND TRACTORS GROUP NO :1
    2. 2. Hand Tractors <ul><li>Usually used in developing countries </li></ul><ul><li>For land preparation in dry & wet conditions </li></ul><ul><li>Suitable for small size fields </li></ul><ul><li>Operator guide the machine by walking along behind it </li></ul>
    3. 5. Operator’s fatigue <ul><li>During field operations hand tractors impose a greater work load on the operator </li></ul><ul><li>Its results in fatigue </li></ul><ul><li>Needs more human energy than a conventional tractor </li></ul>
    4. 6. Important Short Comings in field Operation <ul><li>Excessive vibration feel as the hand grip </li></ul><ul><li>Uncomfortable postures </li></ul><ul><li>Vibration cause diseases in hands </li></ul><ul><ul><ul><li>Vibration syndrome </li></ul></ul></ul><ul><ul><ul><li>Finger disorder </li></ul></ul></ul><ul><ul><ul><li>Causing pain </li></ul></ul></ul><ul><ul><ul><li>Loss of ability to hold the controls </li></ul></ul></ul>
    5. 8. <ul><li>Work related fatigue </li></ul><ul><li>Work related pain </li></ul>Cont…..
    6. 9. Hand Tractor’s Human Energy Demand <ul><li>The human energy demand in the operation of a hand tractor is influenced by </li></ul><ul><li>Forward speed </li></ul><ul><li>The machine balance </li></ul><ul><li>The type of task (wet land/dry land) </li></ul>
    7. 10. How to Reduce Operator’s Fatigue??? <ul><li>A hand tractor was modified to enable operation in a seated position </li></ul><ul><li>The seated posture of operation requires minimal muscular effort </li></ul><ul><li>Reduce the pressure </li></ul>
    8. 11. A Hand Tractor Operator Seat should be comfortable to control; <ul><li>Steering Clutch </li></ul><ul><li>Break Clutch </li></ul><ul><li>High-low speed change lever </li></ul><ul><li>Main speed change lever </li></ul><ul><li>Blade speed change gear lever </li></ul>
    9. 12. Other Hints for a Comfortable Seat.. <ul><li>Back support & foot rests </li></ul><ul><li>Ensure Stability </li></ul><ul><li>Proper seat moments for different operators </li></ul>
    10. 14. Design of a seat Seat pan Strong enough to support the weight of an operator up to 80kg Leaf spring Support the seat & acted as a shock absorber backrest Small backrest of 200mm & depth of 360mm footrest Care was taken to ensure comfort in the seated posture
    11. 15. Advantages of incorporating a Hand Tractor seat… <ul><li>Reducing Human energy consumption. </li></ul><ul><li>Reducing the operational time. </li></ul><ul><li>Increase the efficiency for road transport </li></ul><ul><li>Reducing Work related body pain. </li></ul><ul><li>Reducing vibration intensity in acceleration. </li></ul>
    12. 18. References <ul><li>“ Operator’s Fatigue in Field Operation of Hand Tractors” V.K.Tewari , K.N.Dewangan, published online on 24 th July 2004 </li></ul>
    13. 19. <ul><li>THANK YOU </li></ul>

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