BEARING DEVICE FOR WHEEL

• Main Authors: NAGAI NATSUKO, KARASAWA HIDENORI
• Format: Patent
• Language: English
• Published: 22.07.2013
• Subjects: AXLES FOR WHEELS OR CASTORS; BEARINGS; BLASTING; BRAKES; CASTORS; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INCREASING WHEEL ADHESION; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLE WHEELS; VEHICLES IN GENERAL; WEAPONS

PROBLEM TO BE SOLVED: To provide a bearing device for a wheel capable of obtaining reliability and steering stability, and reducing cost while eliminating any circumferential wobbling of a coupling part.SOLUTION: A through-hole 12 formed of a fitting part 12a and a telescopic part 12b of a large diameter is formed in the inner circumference of a hub wheel 1. A shaft 20 of an outer joint member 14 is fitted to the through-hole 12. A plurality of key grooves 22 extending in the axial direction are formed in the inside diameter of the end of the hub wheel 1 at equal spaces in the circumferential direction. A key groove 23 corresponding to each key groove 22 is formed at the outer circumference at a fore end of the shaft 20 of the outer joint member. The key groove 23 is formed in an inclined manner so as to be gradually enlarged toward the inner side, and a plurality of wedge spaces are formed between the key grooves 22 and the key grooves. Pins 24 are inserted into these wedge spaces. A washer 29 is attached to an anchor bolt 30 and abutted on the pins 24. A male screw 30a of the anchor bolt 30 is screwed to a female screw 21 of the shaft 20, and the hub wheel 1 and the outer joint member 14 are coupled with each other in a torque transmitting manner.