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Front shovel, back hoe and loader

Front shovel, back hoe and loader. Group member:. Lam Wai Kei 50255268 Hui Tan La 50320673. Why do we have to know the differences between them?. Because Different equipments cope with different conditions and tasks Time and effort(efficiency) needed to do tasks will be affected

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Front shovel, back hoe and loader

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  1. Front shovel, back hoe and loader

  2. Group member: • Lam Wai Kei 50255268 • Hui Tan La 50320673

  3. Why do we have to know the differences between them? • Because • Different equipments cope with different conditions and tasks • Time and effort(efficiency) needed to do tasks will be affected • it is used to perform repetitive work • Capacity(e.g. bucket = 1.0 yd3) and • Cycle (e.g. 60 secs/ bucket)

  4. Comparison among 3 machines(wheel type) • Function • Appearance • Operation method There are many sizes and power of the three machine. In general speaking, the main aspects for us to concern is the • bucket capacity, • rotation ability and • up and down ability with similar size

  5. Main Function • Excavation and loading

  6. Hoe • very versatile: dig trench, place pipe, backfill with same hoe • excellent digging power • excellent accuracy for depth control • excellent for loading trucks • productivity approaches power shovel output when digging at moderate depths

  7. Function Back Hoe excavate the earth at a lower level

  8. Functional differences between back hoe and front shovel Back hoe: • Excavate or dig materials below its standing level Front shovel • Dig or ditch material from ground and up to above

  9. Front shovel(pull hoe) After digging, the front shovel is loading surplus onto a truck

  10. Loader The loader is removing surplus off site

  11. Function of loader • used for digging, scooping, lifting, carrying & dumping • used for backfilling, spreading & compacting

  12. Function (summary)

  13. Appearance Front shovel / hoe The working radius is about 20 ft.

  14. Appearance (Cont) Loader

  15. Appearance (summary) • The working radius of shove is larger • The loader is wider

  16. Operation method(When dig, load, haul and dump)

  17. Operation method (Cont)(When dig, load, haul and dump)

  18. Operation method (Cont)(When dig, load, haul and dump)

  19. Operation method (Cont)(When dig, load, haul and dump)

  20. Comparison among 3 machines(wheel type)

  21. Comparison among 3 machines(wheel type) • The long boom of hoe can allow it the dig the soil more flexible and deeper • Since the main function of loader is loading material, it will carry much more material than hoes do. • For the tipping problem, the boom of loader cannot be too long

  22. Difficulties in a restricted area The site is: • small and limited(e.g. in the centre of a traffic road) • Sloppy(e.g. on a hill side) • Many obstacles(e.g. construction material, other equipments)

  23. Which equipment is suitable for the site? It depends on the site condition. • If we need to dig the sides of the site,just like It is better to use a front shovel

  24. Which equipment is suitable for the site? • Reason: • More efficient to use as Back Hoe need to rise its arms first before operation, power will be wasted to uplift the arms

  25. Which equipment is suitable for the site? • If materials below operation needed to be excavated out, back hoe is more suitable to be used.

  26. Which equipment is suitable for the site? • For digging earth, we seldom use loader to carry out , since its bulky size and the limitation on rotation

  27. Which equipment is suitable for the site? How about using loader to transport surplus or material on site?

  28. Which equipment is suitable for the site? It is clear that the cap of loader cannot rotate. (up and down only) On a restricted site, it is impossible to use it to transport material on site as there is no enough space for the to return and move

  29. Which equipment is suitable for the site? • The boom of the hoe can be moved, at about 45o, even in a limited space they can rotate more flexible than loader

  30. Summary In a restricted area, • Back hoe and front shovel are more efficient to undergo digging • Small truck is then used to remove the surplus off site

  31. Reference • http://www.komatsueq.com/Products/shovels.htm • http://www.komatsueq.com/Products/loaders.htm • http://www.citivu.com/fontana/mw/equip.html • http://www.ajaxpong.com.hk/chinese/html/excavator.html • http://www.atvchassis.com/shovel.html • http://www.trucks.nl/ • http://www.yungtay.com.tw/yungtay_hitachi/mach_04.htm • http://www.vanloon.trucks.nl/index.html • McKay, John Kenneth. "Building construction, Volume 4 " 4th ed. Harlow, Essex : Longman Scientific & Technical, 1988. • Seeley, Ivor H. "Advanced building measurement" 2nd ed. London : Macmillan, 1989. • Hardie, Glenn M. "Building construction : principles, practices, and materials"Englewood Cliffs, N.J. : Prentice Hall, c1995.

  32. End

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