3results about How to "Reduce axial play" patented technology

The utility model relates to the technical field of mechanical precision machining, and discloses an embedded main shaft structure of an ultrasonic system, which comprises a body, a shaft core, a front bearing, a bearing pre-tightening ring and a wireless power supply component, and the shaft core is arranged in an inner cavity of the body; a front bearing and a bearing pre-tightening ring are sequentially arranged between the outer side of the shaft core and the inner side of the body, and the bearing pre-tightening ring is located on the side, away from the center line of the shaft core, of the front bearing and used for positioning the front bearing. A containing groove is formed in the end face, away from the front bearing, of the bearing pre-tightening ring, and a wireless power supply assembly is arranged in the containing groove. According to the utility model, the wireless power supply assembly is embedded in the bearing pre-tightening ring for fastening the front bearing, and the bearing pre-tightening ring is arranged between the outer side of the shaft core and the inner side of the body, so that the stability of bearing installation is improved, and the axial movement of the shaft core is reduced, thereby ensuring the working reliability of the main shaft.

An axial semi-closed dynamic and static pressure bearing-rolling bearing combined supporting spindle system of an inertia friction welding machine, the present application relates to the system design of axial bearing and rolling bearing supporting part of axial semi-closed spindle system. The present application aims to realize the semi-closed axial bearing and rolling bearing supporting structure, realize the closed type within the pre-tightening range of back pressure bearing (3), realize the open type outside the pre-tightening range of back pressure bearing (3), so that the assembly is simple and the manufacturing cost is reduced. Back pressure bearing (3) improves the carrying capacity of liquid dynamic and static pressure thrust bearing (11). Back pressure bearing (3) improves the stability of liquid dynamic and static pressure thrust bearing (11) under the condition of large load and high speed, reduces the scraping work of liquid dynamic and static pressure thrust bearing bush, and improves the production efficiency. Spring structure (2) reduces the noise of back pressure bearing (3) during work. The specific structure is shown in abstract drawing 1.

The application discloses an electric drive assembly transmission structure and a vehicle. The electric drive assembly transmission structure comprises an input shaft, an intermediate shaft and an output shaft which are sequentially connected in transmission. The input shaft is a shaft piece of an integral structure, and comprises a first shaft section, a second shaft section and a third shaft section which are sequentially reduced in diameter along an axial direction. The first shaft section is provided with a motor rotor. The second shaft section is provided with a first bearing, and a snap ring is arranged on a side of the first bearing away from the motor rotor. An inner ring of the first bearing and the input shaft are axially connected with the snap ring, respectively. The third shaft section is provided with a first gear which is used for meshing with a second gear on the intermediate shaft. The intermediate shaft is further provided with a third gear which is used for meshing with a fourth gear on the output shaft. Through the above structure, the transmission efficiency of the electric drive assembly can be effectively improved, and the problems of large axial displacement of the input shaft and abnormal sound of the shaft stage (NVH) can be avoided.