| 摘要 |
The present invention provides the stablest coupling structure of a bull gear and a shaft in a converter tilting device. The present invention includes: a shaft having a tapered end portion; a bull gear which has a tapered insertion hole corresponding to the tapered end portion of the shaft; a first ring gear 140 which has a leg 142 supported on the bull gear, and a second ring gear which is provided on the outer side from the first ring gear, and maintains a constant interval from the shaft by a connection member 160, and has a piston rod which is moved in a cylinder unit 156 by a hydraulic pressure from a hydraulic pressure source, thereby coming into contact with a first ring member. If the piston rod pushes the first ring member, the leg of the first ring member pushes the inner side of the bull gear against the fixed shaft, whereby the insertion hole of the bull gear is fit on the shaft. Between the bull gear and the shaft, stress can be evenly distributed over the entire contact area, and disassembling and assembling of the bull gear and the shaft is easy. |
