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From page 80... ... 80 A P P E N D I X B Bus Operator Workstation Engineering CAD Model Specifications Introduction The following information is provided in order to demonstrate the steps and specifications that were applied to the creation of the Engineering CAD Model which was then exported into the 3-D PDF Model. Bus Operator Workstation, Engineering CAD Model, Packaging Reference Components, and Points Two operator packaging points were established as the references around which the seat and steering wheel positions are based. Read the entire page →
From page 81... ... Bus Operator Workstation Engineering CAD Model Specifications 81 Figure B-1. Seat index point (SIP) Read the entire page →
From page 82... ... 82 Bus Operator Workstation Design for Improving Occupational Health and Safety The resulting AHP coordinates in the model were as follows: Xc: 1714.9 mm Yc: 500.5 mm Zc: 0.0 mm Figure B-2. The determination of the AHP according to SAE J1516. Read the entire page →
From page 83... ... Bus Operator Workstation Engineering CAD Model Specifications 83 Figure B-3. The AHP reference from WRS absolute zero. Read the entire page →
From page 84... ... 84 Bus Operator Workstation Design for Improving Occupational Health and Safety The resulting ATRP coordinates in the model were as follows: Xc: 1136.9 mm Yc: 750.2 mm Zc: 495.0 mm Figure B-4. Seat calculated ATRP (SAE J1516) Read the entire page →
From page 85... ... Bus Operator Workstation Engineering CAD Model Specifications 85 Figure B-5. Suggested steering wheel size (457 mm) Read the entire page →
From page 86... ... 86 Bus Operator Workstation Design for Improving Occupational Health and Safety Full Rear, Full Up re. Read the entire page →
From page 87... ... Bus Operator Workstation Engineering CAD Model Specifications 87 Using the SWP described along the rim top and diameter center, the steering wheel center point was positioned using a combination of vehicle data from the physical measures of a similar column and a result of the guideline development analysis. As evident in Figure B-7, the separation of the SWP from the AHP is 221 mm horizontal (SAE J1100 dimension "L11") Read the entire page →
From page 88... ... 88 Bus Operator Workstation Design for Improving Occupational Health and Safety Figure B-8. The suggested steering wheel tilt/telescope adjustment range. Read the entire page →
From page 89... ... Bus Operator Workstation Engineering CAD Model Specifications 89 above the contour reference forward and around 160°. See Figure B-9 for top and right-side views of the shin/knee contours. Read the entire page →
From page 90... ... 90 Bus Operator Workstation Design for Improving Occupational Health and Safety The 3-D eyellipses were constructed according to the process specified for Class B vehicles in SAE J941, Appendix E The size of the two identical eyellipses was constructed with axes defined by a 95th percentile eyellipse and Seat Track Travel (TL23) Read the entire page →
From page 91... ... Bus Operator Workstation Engineering CAD Model Specifications 91 Figure B-10. Eyellipses in 3-D form as developed by SAE J941, Appendix E Read the entire page →
From page 92... ... 92 Bus Operator Workstation Design for Improving Occupational Health and Safety Figure B-11. The visibility sheets extend between the eyellipse tangents and down to the APTA visibility target or up to the APTA visibility angle above horizontal. Read the entire page →
From page 93... ... Bus Operator Workstation Engineering CAD Model Specifications 93 The eye point being described in the formula is referred to as the Japanese Industrial Standard (JIS) eye point, which can be determined by constant offset dimensions from the SAE eyellipse mid-eye centroid as follows (Driver Focus–Telematics Working Group [2006] Read the entire page →
From page 94... ... 94 Bus Operator Workstation Design for Improving Occupational Health and Safety Another useful envelope is suggested by the APTA guideline regarding front and side sun visors/shades. The guideline suggests that "the visor when deployed, shall be effective in the operator's field of view angles more than 5° above the horizontal." The guideline also states that the "deployment of the visor shall not restrict vision of the rearview mirrors." This requirement would create a conflict were it not for the recent addition in the 2013 version of the guideline allowing for the alternative of roller type sunscreens. Read the entire page →
From page 95... ... Bus Operator Workstation Engineering CAD Model Specifications 95 The result of these six surface section curves at Zc: 600 is visible in Figure B-15. The final reach curve was selected by comparing the six manikins based on their varying seat positions and arm reach distances. Read the entire page →
From page 96... ... 96 Bus Operator Workstation Design for Improving Occupational Health and Safety Figure B-16. The reach surface envelope developed from manikin Female U represents maximum reach rotating from clavicle and extends to hand grasp for left and right arms. Read the entire page →
From page 97... ... Bus Operator Workstation Engineering CAD Model Specifications 97 Figure B-17. The reach curve section on the surface at Zc: 600 for manikin Female U Read the entire page →
From page 98... ... 98 Bus Operator Workstation Design for Improving Occupational Health and Safety Figure B-18. Bus operator clearance envelopes for pedal and shoulder-elbow clearance per ISO 16121-1:2012. Read the entire page →
From page 99... ... Bus Operator Workstation Engineering CAD Model Specifications 99 Figure B-19. Steering wheel hand clearance. Read the entire page →
From page 100... ... 100 Bus Operator Workstation Design for Improving Occupational Health and Safety Figure B-20. An additional steering wheel position which tilts forward of vertical 5° with telescope at full upward extension is demonstrated to increase operator access into and out of the workstation area. Read the entire page →
From page 101... ... Bus Operator Workstation Engineering CAD Model Specifications 101 Figure B-21. Balanced step heights and optional consideration of emergency access hatch (SAE J185) Read the entire page →
From page 102... ... 102 Bus Operator Workstation Design for Improving Occupational Health and Safety Figure B-22. A minimum door access opening (SAE J185) Read the entire page →
From page 103... ... Bus Operator Workstation Engineering CAD Model Specifications 103 Figure B-23. Minimum step size (127 mm) Read the entire page →

From page 80...

... 80 A P P E N D I X B Bus Operator Workstation Engineering CAD Model Specifications Introduction The following information is provided in order to demonstrate the steps and specifications that were applied to the creation of the Engineering CAD Model which was then exported into the 3-D PDF Model. Bus Operator Workstation, Engineering CAD Model, Packaging Reference Components, and Points Two operator packaging points were established as the references around which the seat and steering wheel positions are based.