中文字幕欧美激情一区二区_亚洲国产丝袜av激情区精品_欧美在线无码的_久久久久久久久无码精品成人网_亚洲欧美中文v日韩V在线_91啪啪啪免费啪啪啪_欧美伊官方在线_国产乱伦中文字幕国产一区,国产家庭乱伦av免费,思思热久久色,人妻一区二区三区在线播放

Hollow shaft refers to a through hole made in the center of the shaft body, with an inner keyway inside the through hole. The outer surface of the shaft body is machined with a stepped cylinder and an outer keyway.
The outer surface of the shaft body is machined with a stepped cylinder and an external key groove. The center through-hole of the shaft is sleeved with the main shaft of the press chamber, and the input power is driven by the transmission gear installed on the cylinder on the outer surface of the shaft to directly transmit to the main shaft of the press chamber.
The hollow shaft occupies a relatively large space volume, but it can reduce weight. According to material mechanics analysis, when transmitting torque on a rotating shaft, from a radial cross-section perspective, the greater the effect of transmitting torque at the outermost point. When the shaft needs to transmit a large torque, a thicker shaft diameter is required. Due to the small effect of transmitting torque at the shaft center, hollow ones are generally used to reduce the self weight of the shaft.