RU1772263C - Drive for washing machine - Google Patents

Abstract

Usage: household appliances, in particular washing machines. SUMMARY OF THE INVENTION: a machine drive comprises an activator mounted on a vertical shaft, an electric motor and a belt drive with drive and driven pulleys. The drive further comprises means for unloading the activator shaft from the radial load and to absorb the axial load. This tool has a ball bearing and a plate mounted on a driven pulley. The driven pulley is mounted on a ball bearing and the plate is connected to the activator shaft. The transmission of torque to the shaft from the plate provides unloading of the shaft from the radial load of the belt drive. 2 ill.

Description

The invention relates to household appliances, and more particularly to small-sized activator-type washing machines.

A small-sized washing machine is known, comprising a washing tub, an activator placed in it and a drive in the form of an electric motor, on the shaft of which a drive pulley is mounted, transmitting rotation by a V-belt drive to a driven pulley mounted on the shaft of the activator.

The drive of the known machine is compact, insignificant noise is generated during its operation, but it has a relatively low reliability due to the fragility of the sliding bearing and the sealing collar on the activator shaft.

When the activator rotates, the sleeve of the plain bearing experiences an additional radial load and wears out on one side, which entails the crushing of the sealing sleeve on the same side and the leakage of washing solution along the shaft

When washing, the load from the washing solution with the laundry is perceived by the activator. This load acts along the activator shaft and is transferred to the antifriction gasket, which leads to its wear during rotation of the activator.

To eliminate these drawbacks, it is necessary to load the activator shaft from radial and axial loads, respectively equal to the tension of the V-belt and the mass of the column of washing solution with laundry over the activator.

An object of the present invention is to increase operational reliability by reducing the radial and axial loads on the activator shaft.

In FIG. 1 shows a diagram of a washing machine: in FIG. 2 - activator drive.

The washing machine includes a tub 1 for the washing solution and the laundry loaded therein. The tank 1 has a recess in the bottom in which the activator 2 is installed. The activator 2 is mounted and fixed on a vertical shaft 3, which is installed in a plain bearing, consisting of aluminum

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the housing 4 and the bronze-graphite sleeve 5, the housing 4 of the sliding bearing is installed in the hole of the bottom of the tank 1 and secured with a nut 6. To prevent leakage of the washing solution from the tank 1 along the shaft in the upper part of the housing 4 of the sliding bearing there is an additional sleeve 7,

A driven pulley 9 is installed on the plain bearing housing 4 through a deep groove ball bearing 8, and a plate 11 is mounted on the free end of the shaft 3 through the adjusting shields 10, fixed to the hub of the driven pulley 9.

The plate 11 is made in the form of a disk with a central hole for the free end of the shaft 3, which has an element for transmitting torque, for example flats 12. A drive pulley 14 is mounted on the shaft of the electric motor 13, connected by a belt 15 with a driven pulley 9. The washers fO are kept from axial displacement finger 16.

Washing in the machine is carried out by intensive circulation of the washing solution created by the activator 2. The gap between the bottom of the tank 1 and the end of the activator 2 is provided by a set of adjusting washers 10. The activator 2 is rotated by the electric motor 13 through the drive pulley 14. belt 15, driven pulley 9, plate 11 and shaft 3.

This design of the machine eliminates the impact of the belt 3 activator radial load from the belt drive. This load is absorbed through the deep groove ball bearing 8 by the fixed housing 4 of the plain bearing, and the shaft

3 only transmits torque.

Pulley 9 through a deep groove ball bearing 8 mounted on the shank of the housing

4and is not directly connected with the shaft 3, i.e., if the shaft 3 is conditionally removed from the housing 4, then the pulley 9 will remain on the housing 4 (through

bearing) and the belt drive will remain, only the housing 4 will absorb the radial load. To transmit torque from the pulley 9 to the shaft 3

serves as a plate 11, rigidly connected to the pulley 9 and having an element for transmitting torque to the shaft 3, for example, the flats 12.

8 of the claimed device, the axial load P from the washing solution with the laundry through the end surfaces of the flats 12 of the shaft 3, the shims 10, the plate 11 and the pulley 9 is perceived by the same radial ball bearing 8. This solution allows a given clearance H between the end face of the activator 2 hub and the end face of the housing 4 (the clearance is regulated by the rearrangement of the washers 10), which eliminates the need for additional antifriction gasket and two steel washers, which are of the prototype design, and eliminates engine power losses on renie paired activator hub - end housing.

Claims (1)

The claims A washing machine drive comprising an activator mounted on a vertical shaft mounted in a cylindrical housing m kinematically associated with the electric motor by means of a belt drive with driving and driven pulleys, characterized in that, in order to increase operational reliability by reducing the radial and axial loads on the activator shaft, it further comprises a ball bearing, by means of which the driven pulley is mounted on a cylindrical housing, and a plate fixed to the hub of the driven pulley, connected to the free end of the activator shaft with the possibility of transmitting torque. yu Yu FIG.