Research on Innovative Design and Evaluation of Agricultural Machinery Products

Table 10

Functional principles of the hand-held rotary tiller.

Function	Principle	Principle elaboration
Safety	Replacement of a mechanical system ✓; Cushion in advance ✓; Segmentation ✕; Rushing through ✕; Partial or overdone action ✕; Transformation of physical and chemical states of an object ✕	Replacement of a mechanical system was currently a relatively new idea that can be tracked further.; Cushion in advance was less innovative, but it needed studying.; Segmentation, rushing through, and partial or overdone action were not useful for safety.; It was not necessary to increase the cost for transformation of physical and chemical states of an object.
Antivibration	Use of porous materials ✓; Periodic action ?; Segmentation ✕	Use of porous materials was useful for buffer vibrations. Periodic action may cause resonance. Segmentation was not appropriate for Antivibration.
Antiskid	Composite materials ✓; An inexpensive short-life object instead of an expensive durable one?; Transformation of physical and chemical states of an object ✕; Extraction ✕	Composite materials can be considered emphatically.; The inventive principle of cheap alternatives was needed further analysis. The principle that transformation of physical and chemical states of a hand-held rotary tiller may increase costs was not taken into account.; Extraction was not very suitable for the product.
Practical	Dynamicity ✓; Replacement of a mechanical system?; Use a pneumatic or hydraulic construction?; Thermal expansion ✕	Dynamicity deserves to be considered and used.; The inventive principle of replacing mechanical systems using pneumatic or hydraulic structures can continue to be tracked. Thermal expansion can be excluded.

All the principles come from the 40 original principles of TRIZ.