4results about How to "Improve running smoothness" patented technology

The application discloses a crankshaft transmission mechanism for an engine, which comprises a crankshaft and a connecting rod, a crank arm and a balance weight are integrally formed and are connected through a smooth transition of a concave arc surface; a first boss in a ring shape is arranged on the outer side surface of the crank arm near the two ends of the crankshaft, and the radial outer contour of the first boss extends to be tangent to the concave arc surface; the end surface of the one end of the crank arm where a connecting rod journal is located is a circular arc surface, is concentric with the connecting rod journal, and has a diameter smaller than the outer diameter of the axial end surface of the big end of the connecting rod. The radial size of the first boss is enlarged to increase the contact area with the inner wall of the shell to reduce the surface pressure, meanwhile, the big end of the connecting rod is exposed to the axial end surface to form a lubrication exposed area through the circular arc surface, so that forced lubrication and cooling are realized; and through the structure that the end surface of the driving gear is integrated into a contact surface, the semi-ring second boss surface is axially positioned, the connecting rod journal is thickened, and the eccentric mass block of the balance shaft is recessed to avoid, the wear resistance, the lubrication and heat dissipation performance, the structural strength and the running stability of the crankshaft transmission mechanism are simultaneously improved under the compact layout.

The invention provides a machining method and device for a cross-flow fan with multiple sections of impellers connected in series. The machining method comprises the steps that at least four end plate blanks guaranteeing the parallelism of the upper face and the lower face are stacked and fixed to a tool plate; synchronously machining a rotating shaft center hole, a positioning pin hole and a directional reference surface corresponding to the axis of the impeller on the fixed end plate blank; the end plates are detached; a cross beam corresponding to each impeller unit is machined, and positioning pin holes in the two sides of the cross beam are machined on the basis that the parallelism of the butt joint plane is guaranteed; two end plates corresponding to a single impeller unit are positioned and placed on the datum planes of the two end plates, a coaxial tool penetrates through rotating shaft center holes of the two end plates, a cross beam is arranged between the two end plates and pre-fastened through screws, and positioning pin holes in the end plates and the cross beam are corrected and finely machined through a reamer; at least two impeller units are connected in series along the axis, and positioning and fixing are conducted at the butt joint positions of the adjacent impeller units. The cross-flow fan manufactured based on the method is small in vibration, low in noise and stable in operation, the product performance is substantially improved, and the service life is substantially prolonged.

The utility model discloses a precise planetary reducer for a servo ring rolling mill, which relates to the technical field of reducers and comprises a first outer shell, a second outer shell is arranged on one side of the first outer shell, and the first outer shell and the second outer shell are fixedly connected through a plurality of bolts and nuts. An input shaft is arranged on the inner side of the first outer shell, the inner wall of the first outer shell is connected with the input shaft through an input rotating bearing, an auxiliary sun gear is fixedly arranged at the inner end of the input shaft, a main sun gear is arranged on the inner side of the second outer shell, and the auxiliary sun gear and the main sun gear are connected through a fixed rotating shaft. A gear ring is fixedly arranged on the outer side of the main sun gear and the inner wall of the second outer shell. The input shaft is subjected to limited rotation through the input rotating bearing, the running resistance during rotation of the input shaft is reduced, the input shaft is also prevented from being in contact with the inner wall of the first outer shell, and the auxiliary sun gear and the main sun gear are arranged in a matched mode, so that redundant space in the second outer shell is filled with lubricating grease.

A computer-implemented method for determining a closing time point of an injector of an internal combustion engine by means of a classifier, wherein the method comprises the steps of: determining a time series of input signals, wherein the input signals each correspond to a time point within the time series and each characterize a deformation of the injector; determining, by means of the classifier, a plurality of first values based on the time series of input signals, wherein each first value corresponds to a time point of the time series and the first value characterizes a probability that the closing time point of the injector coincides with the time point; determining a plurality of second values, wherein a second value is a sum of an adjacent first value and the first value, respectively, wherein the second value corresponds to the time point to which the first value corresponds; determining the closing time point based on a maximum second value of the plurality of second values.