RU1812046C - Device for assembly of press-fit joints, type shaft-to-bush - Google Patents

Abstract

Usage: mechanical assembly production. SUMMARY OF THE INVENTION: the device comprises a housing with a mandrel for receiving a sleeve therein and a shaft mandrel. Both mandrels are mounted coaxially with the housing in a sliding fit and can be moved horizontally relative to one another. 2 ill.

Description

The invention relates to the field of mechanical assembly production, can be used in the installation of bushings, rings on shafts of machines with guaranteed tension.

The purpose of the invention is to improve the accuracy of the joint by increasing the accuracy of mounting the mating parts at the assembly position and maintaining this accuracy during the pressing process.

A significant difference is the installation of the mandrels relative to the housing coaxially on a sliding fit, the mandrels being able to move in the axial direction relative to one another. This makes it possible to increase the accuracy of the relative position of the parts to be joined at the assembly position, and the rigidity of the housing ensures its preservation during the pressing process and the minimum deviation from the alignment of the actuating surfaces of the shaft and the sleeve.

In FIG. 1 shows the assembly diagram of the node; in FIG. 2 - installation of connected parts in a common housing.

A shaft 1 connected to

the sleeve 2, which have the Executive surface 3. 4. When assembling the node, the shaft is based on the surface 3 in the mandrel 5, located in the cylindrical hole of the housing 6, and the sleeve is based on the surfaces 4 and 7 in the mandrel 8 (figure 2), placed the same cylindrical hole of the housing 6. The mandrels 5 and 8 are mated with the cylindrical holes of the mandrels 5 and 8 also on the sliding fit. The installation of the shaft and the sleeve in the mandrels and mandrels in the housing along the sliding fittings makes it possible to remove the assembled assembly from the housing 6 upon completion of the combination of the mating surfaces 9 and 10 of the shaft and the sleeve. The axial, axial force during pressing is ensured by acting on the punch 11. The parts are connected to the assembly, the left end of the housing b resting on a fixed plane and applying axial force to the end of the mandrel 8 through the punch 11. In this case, the connected parts interact with the surface the chamfers, and then interaction begins with the mating surfaces 9 and 10. The base of the part in a common housing on the surface of its cylindrical hole ensures the movement of the mandrel 8 together with the sleeve 2 in the direction determined l emom surfaces of the mandrel 8 and the housing 6 regardless of the magnitude of the axial force and its direction of action in the presence of a possible skew plane outer punch 11 and the possible effects of the changes of the punch actuator on the elastic deformation of its elements. The accuracy of the joint assembly depends only on the size of the gaps in the connections of the mandrel 8 with the housing 6, the length of the mandrel 8, the values of the gaps in the connections of the shaft 1 and the sleeve 2 with the mandrels 5 and 8.

With a decrease in the gaps in these joints and an increase in the length of the mandrel 8, the accuracy of the assembly increases. In addition, the mandrel 8 can be made so that: its seating surfaces and the plane of the end face facing the shaft will be machined from one installation, which ensures alignment of its seating surfaces and the perpendicularity of the end face to the axes of these surfaces.

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Using the proposed device provides the following advantages in comparison with existing devices: it increases the accuracy of the assembled units, stabilizes the pressing force by limiting possible misalignment of the axes of the parts to be joined, and improves the quality and strength of the assembled units by eliminating the causes of cutting of the mating surfaces of the parts.

Claims (1)

SUMMARY OF THE INVENTION A device for assembling press joints of the shaft-sleeve type, comprising a housing with a mandrel for receiving the sleeve therein, a press-in element, which includes that, in order to improve the accuracy of the connection, it is provided with a mandrel for placement a shaft therein, both mandrels being mounted in the housing coaxially with it in a sliding fit and with the possibility of horizontal movement relative to one another.