Design of Universal Mounti ng Fixture and Deployable Roll-Over Protective Structure for 2WD Agricultural Tractors
KrishiKosh
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Title |
Design of Universal Mounti ng Fixture and Deployable Roll-Over Protective Structure for 2WD Agricultural Tractors
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Creator |
Ashish Kumar Shrivastava
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Contributor |
V.K. Tewari
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Subject |
irrigation, soil management, spacing, groundwater table, food preservation, saline soils, land resources, drainage systems, crops, layering
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Description |
AWT-198
More than 4.5 million farmers own tractors in India and rollover appear a serious concern in safety. Very successful step in lowering the number of rollover deaths was the addition of ROPS to tractors. However, ROPS are still not a standard piece of equipment on Indian tractors although several standardization and legislative implementation have taken place worldwide. Therefore to address the issue and providing a complete solution to existing challenges the investigation has been taken place. To assess the scenario of ROPS and variation of axle housings design, a questionnaire survey were conducted. Further categoriz ation of axle housings and axle housing Strength Index were determined. Moreover , an ‘Universal Mounting Fixture (UMF)’ was designed and developed for ROPS retrofitting which incorporate variation in the cross-sections of ROPS and non uniformity in the fixing location since many axle housings do not have square and rectangular sh ape. In order to maintain International Standard and for ‘approved’ fitment, a Test Rig was developed to perform Static testing of ROPS. To accelerate the ROPS retrofitting, a deployable type ROPS was also designed and fabricated. The results indicated that none of the manufactures is providing ROPS on Indian tractor models. Several designs of axle housing exist in the tractor models manufactured by different companies. Axle housing strength index has been worked out to be 1.57. Developed Test Rig has been found strong enough to perform static testing of ROPS. Universal mounting fixture was found capable of satisfying IS 11821 (Part 2): 1992 requirements. It could accommodate size 40 mm × 60 mm to 70 mm × 90 mm of hollow recta ngular section and 40 mm to 90 mm diameter size of hollow circular cross sections. The D-ROPS was designed and developed using hollow circular section. The cross section of fixed post was found to be 88.9 × 7.62 mm whereas 73 mm × 5.16 mm was decided for deployable post. D-ROPS was able to retrofitting on tractor, thus increasing the overall safety of the operators. Proper implementation of policies and stride nt regulation with this engineering intervention expected to reduce high number of fatalities of tractor overturn per year. |
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Date |
2017-01-06T12:08:55Z
2017-01-06T12:08:55Z 2013 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/94826
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Format |
application/pdf
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