| 摘要 |
A hub of a vehicle bearing device has a cylindrical portion and a flange portion. The flange portion has a pin hole formation portion, a reference position intermediate portion, separate position intermediate portions, and build-up portions. The reference position intermediate portion is formed between bolt hole formation portions. The first separate position intermediate portion is formed between bolt hole formation portions. The second separate position intermediate portion is formed between bolt hole formation portions. The pin hole formation portion is formed at the reference position intermediate portion, and has a hub side pin hole. A pin for fixing the hub and a brake rotor to each other is inserted into the hub side pin hole. The build-up portions are formed on the separate position intermediate portions, and are balanced in terms of weight with the pin-hole formation portion. |
| 主权项 |
1. A vehicle bearing device with a hub,
wherein the hub is a portion to which a brake rotor is fixed and which has a cylindrical portion and a flange portion; the flange portion has a plurality of bolt hole formation portions protruding outwardly from the cylindrical portion, one pin hole formation portion, one reference position intermediate portion, two adjacent position intermediate portions, one or a plurality of separate position intermediate portions, and a balance adjustment portion; the reference position intermediate portion is formed between the bolt hole formation portions adjacent to each other in the peripheral direction of the cylindrical portion; the adjacent position intermediate portions are formed between the bolt hole formation portions adjacent to each other in the peripheral direction of the cylindrical portion, and are formed at positions adjacent to the reference position intermediate portion with the bolt hole formation portion therebetween in the peripheral direction of the cylindrical portion; the separate position intermediate portions are formed between the bolt hole formation portions adjacent to each other in the peripheral direction of the cylindrical portion, and are formed at positions adjacent to the adjacent position intermediate portions with the bolt hole formation portions therebetween in the peripheral direction of the cylindrical portion and at positions on the side opposite to the reference position intermediate portion with respect to the adjacent position intermediate portions; the bolt hole formation portions have hub side bolt holes; the plurality of bolt hole formation portions are formed at equal intervals in the peripheral direction of the flange portion; the hub side bolt holes are formed as portions into which wheel bolts for fixing the hub and the brake rotor to each other are inserted; the pin hole formation portion is formed at the reference position intermediate portion, and has a hub side pin hole; the hub side pin hole is formed as a portion into which a pin for fixing the hub and the brake rotor to each other is inserted; and the balance adjustment portion is formed at the one or the plurality of separate position intermediate portions, and is well-balanced in weight with the pin hole formation portion. |
