Design assistance device for steering device and method of assisting steering device design

A design assistance device for a steering device, the design assistance device assisting a design of an intermediate shaft module including a tube yoke and a shaft yoke connected to the tube yoke, the design assistance device for the steering device comprising:

• a storage unit which stores at least
• information having a joint length as a distance between a first connection reference point where the intermediate shaft module is connected to a column yoke and a second connection reference point where the intermediate shaft module is connected to a pinion side yoke and a fitting length specification as a condition of a fitting length where the tube yoke and the shaft yoke are connected to each other,
• information of an existing component of an already designed tube yoke, and
• information of an existing component of an already designed shaft yoke;
• a candidate component extraction unit which extracts a candidate component of the tube yoke included in the joint length from the information of the existing component of the tube yoke and extracts a candidate component of the shaft yoke included in the joint length from the information of the existing component of the tube yoke;
• a calculation unit which is disposed between the first connection reference point and the second connection reference point and calculates an instruction for storing a combination of the candidate component of the tube yoke and the candidate component of the shaft yoke in the storage unit when the fitting length where the candidate component of the tube yoke and the candidate component of the shaft yoke are combined with each other satisfies the fitting length specification;
• and
• a display unit which displays an index indicating the presence of the instruction calculated by the calculation unit.