SU1368157A1 - Arrangement for press-fit assembly of shaft-bushing type part - Google Patents

Abstract

The invention relates to an assembly production, in particular, to devices for assembling with the tension of parts such as a shaft-hub. The aim of the invention is to improve the quality of the obtained compound. For this, the stem 2 of the power cylinder mounted on the base I is complete with a step

Description

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tym The end portion of the rod having a smaller diameter is located in the through axial bore 4 of the body 3 of the power cylinder. The distance from the stem seal 12 to the edge of the annular cavity 21 determines the amount of mechanical pressing. When high pressure is applied through the nozzle 15 into the annular cavity 21, the housing 3 together with the sleeve 8 is mixed by a predetermined amount until the cavity 21 is in communication with the cavity of the sleeve 8. When

Further injection of high pressure in the cavity 21 increases the internal diameter of the sleeve 8 and its base assembly with the shaft 7 with the supply of working fluid under pressure into the interface. The position of the floating piston relative to the rod 2 determines the pressure in the cavity 21, and the adjustable movement of the floating piston allows this pressure to be changed stepwise. 1 il.

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The invention relates to an assembly production, in particular to an assembly with a tension of parts such as a shaft hub.

The aim of the invention is to improve the quality of the compound obtained by limiting the length of the initial mechanical pressing in and, consequently, reducing, in conjunction, the contact surface area with a reduced tension value, resulting from the cut-off of asperities, as well as adjusting the pressure in the working shift cavity of the power cylinder .

The drawing shows the proposed device, a longitudinal section of

The device dp of assembly with the tension of details like shaft sleeve contains base I, on which the power cylinder is installed, the rod 2x of which is fixed on the base, and the body 3 has the possibility of axial reciprocating movement.

The body 3 of the power cylinder is made with a through axial bore 4, the diameter of which is smaller than the diameter of the body cavity, at its end facing the assembly to be assembled, a seal 5 is fixed, as well as clamps 6 for the sleeve 8 being pressed onto the shaft 7. also made the channel. 9 with a fitting 10 for communicating the housing cavity with a high pressure source (not shown).

The rod 2 of the power cylinder is made of stepped shape with a plot of smaller diameter 11, installed in

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through hole 4 of the housing, seals 12 and 13, as well as channel 14 with fitting 15 for high pressure supply

A floating piston in the form of a sleeve 16 with a stepped external surface and a seal 17 is mounted in the cavity of the ram cylinder of the concentric rod 2 with the possibility of axial movement, while the end face of the sleeve 16 is mounted on a removable support 18 mounted on the base. The housing is fixed Krishka 19 with a seal 20.

In the cylinder there are two annular cavities 21 and 22 formed by the surfaces of the housing 3, the rod 2 and the floating piston.

The device works as follows.

A press-fit sleeve 8 is mounted on the body 3 of the power cylinder, which is fixed by the grippers 6. The mating shaft 7 is guided to the end of the sleeve 8 until it stops, and the other end of the shaft is abutted against the base 1. When high pressure is supplied through the fitting 15 into the annular cavity 21 body 3, together with the sleeve 8 attached thereto, are moved to a predetermined mating length until the stem seal 12 extends beyond the edge of the annular cavity 21, the latter being connected with the internal cavity of the sleeve 8 being pressed. This completes the mechanical pressing ka 8 sleeve, and with a further injection of high

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the pressure increases the internal diameter of the sleeve and its main assembly with the shaft 7 with the supply of liquid under pressure into the interface.

Fitting 22 is recognized for high pressure supply. The annular cavity 21, when the piston piston is moved to its initial upper position and designed for the formation of joints with maximum tensions. At low values of the tension or reduction of the coupling diameter, the removable support 18 is removed, and the floating piston is lowered all the way into the cover 19.

Claims (1)

Invention Formula A device for assembling with a tension of parts such as a shaft-bushing, containing a cylinder mounted on the base, the rod of which is fixed to the base, and the housing is provided with a through-hole with a coaxial cavity in the end wall remote from the base and mounted with the possibility of axial return -available movement, floating piston, placed in the cavity of the power cylinder coaxially with the rod with the possibility of reciprocating movement, mounted on the housing 74 the power cylinder clamps for the sleeve, as well as the source of high pressure, while the rod of the power cylinder is made with a channel associated with a source of high pressure, characterized in that, in order to improve the quality of the connection, it is equipped with a removable support mounted on the base in the cylinder body is made with a diameter less than the diameter of its cavity, the rod is made in a stepped form with a section of smaller diameter located at the end remote from the base and installed in the through hole As the case, the floating piston is made in the form of a sleeve with a stepped outer surface, facing a greater degree to the through hole of the case and mounted concentrically to the rod, forming an annular cavity between its lateral outer surface and the inner surface of the case, communicating with a high pressure source. their ends with a support, while the stem channel communicates with the annular cavity formed by the end of a larger stage facing the through-hole of the housing body surface and stem surface.