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EMAX Lawnmower Improvements for 2013 Sales Season

EMAX Lawnmower Improvements for 2013 Sales Season. Paul Hodgson Design Engineer. Project Objectives This project was initiated to address the various quality and performance concerns related to the EMAX lawnmowers that have arisen during their first season in the marketplace

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EMAX Lawnmower Improvements for 2013 Sales Season

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  1. EMAX Lawnmower Improvements for 2013 Sales Season Paul Hodgson Design Engineer

  2. Project Objectives • This project was initiated to address the various quality and performance concerns related to the EMAX lawnmowers that have arisen during their first season in the marketplace • From the analysis of these concerns it has been possible to identify the contributory faults and devise solutions. These solutions and implementation details are illustrated in the following slides 2

  3. EMAX32 1. Switchbox / Handle Improvements 2. Transmission Improvements (motor, belt, housings) 3

  4. 1. EMAX32 Switchbox / Handle Improvements 1a. Additional screw bosses to improve switch location 1d. Additional ribs added in housing to retain lock button when actuated 1b. Lever actuator thickened to increase rigidity 1e. Uprated lever sping to ensure lever fully retreats upon release 1c. Lock button / lever interface redesigned to ensure positive engagement and correct actuation of switch 4

  5. 1. EMAX32 Switchbox / Handle Improvements 1f. In redesigning lock button / actuator interface, switching postion has been moved earlier in stroke. More over travel 5

  6. 1. EMAX32 Switchbox / Handle Improvements 1g. Dimensional changes to screw bosses and supporting ribs to secure switchboxes to handle and limit rotational movement 6

  7. 2. EMAX32 Transmission Improvements 2a. Material change on main structural components to BMC. This gives improvements in terms of dimensional and temperature stability. Fundamentally, it is a more rigid material which will allow a lower belt tension, thus reducing stress on all connected components within the transmission 7

  8. 2. EMAX32 Transmission Improvements 2b. Extra grinding operation added to manaufacture of armature shaft to ensure that assembled pinion meets run-out specification 2c. Belt retenion lip increased on gear wheel 8

  9. EMAX34 / 38 3. Switchbox / Handle Improvements 4. Transmission Improvements (motor, belt, housings) 9

  10. 3. EMAX34 / 38 Switchbox / Handle Improvements 3. All switchbox changes are the same as described on EMAX32 10

  11. 4. EMAX34 / 38 Transmission Improvements 4a. Belt retenion lip increased on gear wheel 4b. Extra grinding operation added to manaufacture of armature shaft to ensure that assembled pinion meets run-out specification 11

  12. EMAX42 5. Switchbox / Handle Improvements 6. Transmission Improvements (motor, belt, housings) 12

  13. 5. EMAX42 Switchbox / Handle Improvements 5a. Internal modifications as described on EMAX 32/34/38 5b. Pivot support location improved to ensure positive switching over complete length of bale bar 13

  14. 6. EMAX42 Transmission Improvements 6a. Belt retenion lip increased on gear wheel 6b. Extra grinding operation added to manaufacture of armature shaft to ensure that assembled pinion meets run-out specification 14

  15. EMAX 34 / 38 / 42 Grassboxes Standardise clip dimensions on EMAX 34 & 38 grassboxes to match those on EMAX42 EMAX 34 & 38 grassbox clips will be modified when production schedule allows access to mould tools. There is no functional problem with EMAX 34 & 38 grassboxes as they are currently being produced, the modification is to standardise dimensions across all SKUs 15

  16. Implementation Summary 16

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