Built-in spindle ram mechanism

The utility model relates to a built-in spindle ram mechanism, and relates to the technical field of machine tool manufacturing, the built-in spindle ram mechanism comprises a support frame and a ram slidably arranged on the support frame, a hard rail is arranged on the ram along the sliding direction of the ram, the support frame is provided with a guide groove for the hard rail to insert, and the guide groove is arranged on the support frame. A filling layer is arranged between the hard rail and the groove wall of the guide groove, and the hard rail and the filling layer are arranged in a sliding mode. Through combined use of the linear rails and the hard rails, the cutting strength of the ram can be improved. 本申请涉及一种内藏式主轴滑枕机构，其涉及机床制造技术领域，其包括支撑架以及滑动设置在所述支撑架上的滑枕，所述滑枕上设有硬轨，所述硬轨沿着所述滑枕的滑动方向设置，所述支撑架上设有供所述硬轨插入的导向槽，所述硬轨与所述导向槽槽壁之间设有填充层，所述硬轨与所述填充层滑动设置。本申请通过线轨与硬轨的组合使用，能够提高滑枕的切割强度。