SU365233A1 - DEVICE FOR HYDROPRESSING ASSEMBLY OF DETAILS TYPE TYPE SHAFT WITH GUARANTEED TENSION - Google Patents

Description

one

The invention relates to the field of assembly, in particular press fittings.

A device is known for hydropressing assembly of parts such as a shaft sleeve with guaranteed tension, comprising a support coaxially mounted on a fixed base for fixing the shaft and a hollow cylindrical body with a piston located in it, and also between them a cradle for locating the sleeve.

However, the known device does not provide a high quality film with a high pressing force.

The proposed device differs from the known ones in that at the end of the shaft facing the shaft there is a cylindrical groove with a diameter smaller than the shaft diameter forming a cavity connected to the inner surface of the cylindrical body connected to a low pressure source, while the piston is mounted movably and the support for fixing The shaft is equipped with a mechanism for moving the shaft in the axial direction. Such an embodiment of the device increases the quality of the connection and reduces the pressing force.

FIG. 1 shows the proposed device; in fig. 2 is an AA section of FIG. one.

The device comprises a support coaxially mounted on a fixed base / for mounting the shaft 2 with the mechanism for moving the press-in into a sleeve in the form of a rod 3 of a power cylinder and a hollow cylindrical body 4 with a piston 5 located in it.

At the end of the shaft facing shaft 2, a cylindrical groove with a diameter smaller than the shaft diameter is formed, forming a cavity A with the inner surface of the cylindrical body 4 connected to a low pressure source of 100–200 kg / cm through

inlet valve 6, and valve 7 is designed for high pressure.

Porschen 5 is movably mounted and creates the necessary force to press pin 8 to the end of shaft 2 in the process of pressing it into sleeve 9,

for example a gear wheel.

In addition, the device is equipped with a prism 10 for raising the shaft to a line of centers // and 12, as well as a cradle 13 in the form of a carriage for the base of a sleeve, for example a gear

wheels, also on the line of centers, and to press it against the sealing ring 14. The device operates as follows. The sleeve (or gear) 9 is fed into the cradle 13 in the form of a carriage, pre-adjusted in height to the desired size, and the shaft 2 is fed into the prism 10. The cradle 13 moves to the right and presses, for example, the gear to the sealing ring 14 to create a cavity tightness BUT.

The prism 10 lifts the shaft to the line of centers 11 and 12. The center 12 moves to the left and feeds the shaft to the center 11, with the shaft fixed in the upper position, after which the prism is lowered.

The mechanism for moving the shaft in the form of a rod 3 of a power cylinder moves the shaft to the right and centers it in a hole, for example, a gear wheel along a chamfer. The piston 5 of the fifth 8 is pressed against the end of the shaft than provides. with the integrity of the cavity l.

Oil from the pump is fed through inlet valve 6 into cavity A under a pressure of 100-200 kg / CMj, after which the pressing process begins.

An increase in pressure in the cavity L to 1500-2000 kg / slg is achieved due to the difference in the diameters of the shaft 2 and the bore of the piston 5.

Due to the increase in pressure between the mating surfaces, oil is formed on the interlayer, reducing the pressing force 5-7 times and preserving the quality of the mating surfaces.

After pressing is complete, all parts of the device take their initial position in

reverse order, and the assembled connection is automatically removed from the assembly zone and directed further along the process.

Subject invention

A device for hydropressing assembly of parts such as a shaft bushing with guaranteed tension, containing coaxially mounted on a fixed base a support for fixing the shaft and a hollow cylindrical body with a piston located in it, as well as a space for placing the bushing between them, characterized in In order to improve the quality of the joint and reduce the pressing force, a cylindrical bore with a diameter smaller than the shaft diameter and forming the inner surface of the cylinder is made at the end of the piston facing the shaft. The cavity is connected to a low pressure source, while the piston is movably mounted, and the support for fixing the shaft is provided with a mechanism for moving the shaft in the axial direction.

five

12

FIG. one