SU1479704A2 - Assembly for axial fixing a part on shaft - Google Patents

Abstract

The invention relates to mechanical engineering. The axial assembly of the part on the shaft comprises a pressure assembly consisting of a split ring 3 located in the annular groove 4 and a central nut 6. The assembly has an intermediate sleeve 7 with a thread 8 on the outer surface. The nut 6 is screwed onto the thread 8. The sleeve 7 is locked from rotation by the key 10. Taper bore 14 is made on the fixed part 2, and the counter conical bevel 15 is fixed on the nut 6, and the angle of inclination кон of the conical surfaces does not exceed the angle of inclination of the thread profile 8. When the assembly is rotated due to central forces, radial deformation of the nut 6 occurs, which in this case is displaced axially along the thread, but since angle Α does not exceed the angle of the thread profile, thread 8 does not relax, i.e. reliability of fastening increases. 1 il.

Description

Ichoborno refers to the mgshinno- grooved, can be used in pump engineering to mount the impeller on the shaft and is in addition to auth.s. No. 1262126.

The purpose of the invention is to increase the reliability of fastening.

The drawing shows the construction of the node.

The axial fastening assembly comprises a collar 1 on the shaft for abutment of the fixed part 2 and a pressure assembly consisting of a split ring 3 located in the annular groove 4 of the shaft 5 and the central nut 6. The assembly is provided with an intermediate sleeve 7 with a thread 8 on the outer surface, an annular groove 9 under the split ring 3 and a locking element 10 of the sleeve 7 against rotation relative to the fixed part 2. In this case, the central nut 6 is screwed onto the thread 8 of the sleeve 7. The locking element 10 is made in the form of a key. The key is located in the longitudinal grooves 11 and 12, respectively, on the protrusion 13 of the fixed part 2 and the intermediate sleeve 7. On the fixed part 2 from the end of the central nut 6 there is a tapered bore 14, and at the end of the nut 6 there is a reciprocal conical bevel 15, and the angle d the inclination of the generatrix of the conical surfaces of the bore 14 and the bevel 5 to the axis of the shaft does not exceed the angle of inclination of the thread profile 8 of the sleeve 7.

The fastening is carried out as follows.

Install the fixed part 2, the intermediate sleeve 7 with the key 10 and the split ring 3 so that

five

0

five

0

five

0

as shown in the figure. Then, the nut 6 is screwed onto the thread 8 of the sleeve 7. After the nut 6 comes into contact with the protrusion 13 of the fixed part 2, the intermediate sleeve moves in the axial direction. to the stop into the split ring 3. The nut 6 is tightened to the required tightening force. In operation, the axial force from the side of the fixed part 2 is transmitted through the nut 6, the thread 8, the intermediate sleeve 7 and the split ring 3 to the shaft. Elimination of a single stress concentrator in the form of a longitudinal groove for a key from the shaft makes it possible to increase its strength characteristics. By making tapered bore 14 and bevel 15 with an angle cf not exceeding the inclination angle of the thread profile 8 of the sleeve 7, the thread tightening is not loosened by the radial deformation of the nut 6 under the action of centrifugal forces, since its axial displacement along the thread profile 8 is compensated by the offset of the nut 6 along the conical surface of the bore 14. As a result, the reliability of fastening increases. t

Claims (1)

Invention Formula Knot axial mounting parts on the shaft by author. St. No. 1262126, characterized in that, in order to increase the fastening reliability, a conical kindling is made on the fixed part from the side of the central nut, and a counter conical bevel is on the nut end, and the angle of inclination of the generatrix of the conical surfaces of the bore and bevel to the shaft axis exceeds the angle of inclination of the thread profile of the sleeve.