<p>This thesis has been made in cooperation with the forestry machinery producerEco-Log in Söderhamn. The focus of the thesis has been to find a cheaper wayto open the large engine hood of the company’s harvesters. The goal was tofind a solution that could increase the value for the customers by being saferand simpler to use, or, at the least, keep these values at an equal level comparedto the previous solution.In order to make it possible to CE-mark the new solution, it was importantMachinery Directive that came into effect from the beginning of 2010.To begin with, a specification of requirements was set up. Thereafter, anumber of different basic concepts was retrieved and evaluated. The chosenconcept was to use electro-mechanical actuators for the opening of the largeengine hood. A market research was made, where a number of differentactuators were chosen. Thereafter, a program that found possible placementsfor them was designed. Some of the alternatives were test assembled in theCAD-model of the machine, which gave information for a meeting with theEco-Log engineering team, where one final concept was to be chosen.The chosen concept was based on using an actuator from the manufacturerLinak with the stroke of 400 mm that was to be placed in a horizontal positiondirectly under the hood. To ensure that the hinges would be able to resist thenew pressure, a new hinge concept was developed. All parts of the finishedoverall concept were stress tested with FEM-analysis to detect any problems.The mounting brackets on the tank bow and in the hood were created in 8mm sheet metal. To endure the surface pressure in the mounting hole on thebracket, the mounting plates will be manufactured in steel with a yield point of500-650 MPa.The actuator is manoeuvred by a spring centre rocker switch. To be able toaccess emergency manual operation the actuator will be mounted in a 30degree angle.To sum up, the final solution was cheaper, safer and easier to assemble.</p>
| Identifer | oai:union.ndltd.org:UPSALLA/oai:DiVA.org:uu-119314 |
| Date | January 2010 |
| Creators | Nilsson, Johan |
| Publisher | Uppsala University, Industrial Technology |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, text |
| Relation | TVE ; 10001 |
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