DE10331949B3 - A method for maintaining the belt tension in a domestic washing and drying machine has a combined drum motor and fan motor assembly which is pivoted and tensioned by a spring - Google Patents

Abstract

The wash drum (7) is driven by an electric motor (1) and drive belt (6) and the drying fan(s) (12) by a motor (3) to which the first motor is coupled (2). A spring (13) tensions the belt by pivoting the motor assembly about the shaft bearings (11) of the second motor.

Description

The The invention relates to a household tumble dryer according to the preamble of claim 1.

household dryer can be designed so that a motor for driving a laundry drum and another motor is provided for driving a fan. Both engines are. each separately on a bearing block connected to a housing bottom held. The drive of the laundry drum is additional provided with a belt tensioning device. The provision of two separate bearing blocks is expensive and requires a relatively large amount of space.

To counteract this disadvantage, household tumble dryers are known to provide a single motor for driving the laundry drum and the blower. The motor is pivotally accommodated in a bearing block provided on the housing bottom. The laundry drum is driven by a pulley received on the motor shaft and a belt (see DE 80 11 829 U1 ). To tension the belt, the motor is pivotally received about an axis in the bearing block. The belt tension is maintained by means of a train attached to the motor spring. At least one fan of the fan is also attached to the shaft. The disadvantage of this solution is that the blower can only be operated if at the same time the laundry drum is rotated. Especially with regard to a gentle drying of the laundry, a separate operation of the laundry drum and the blower is desirable.

Also from the DE 100 01 702 C1 a condensation dryer with a drive unit is known in which fan wheels for cold air and process air are arranged on the motor shaft of the electric motor. At the same time, the belt drive device for the drying drum is coupled to the motor shaft.

From the DE 1 054 956 C is a washing and spinning machine is known, which has two motors for driving the drum to provide the required performance when starting the drum. The auxiliary engine 9 is on the engine 2 attached with its own holder. Even with these household machines, it is not intended to drive the various functions, each with their own engines.

task The invention is to provide a household tumble dryer, the preferably easy and inexpensive can be produced and in which the laundry drum and the fan independently are operable.

These The object is solved by the features of claim 1. Expedient refinements result arising from the features of the claims 2 to 13.

To proviso The invention provides that the first drive device mounted on the second drive means, and that the second Drive device for tensioning the belt against the action a return means pivotable on the housing is held. The proposed solution requires installation Both drive devices only the provision of a single Bearing block. The proposed household tumble dryer is simple and economical produced. The proposed arrangement of the drive devices is space saving. As a result, the household tumble dryer be equipped with other modules, which additional Enable functions.

Under the term "drive means" is an electric operable device understood that also with a gearbox can be provided. It has an electric motor.

advantageously, the second drive means is pivotable by means of an axis with the housing connected, and a second shaft of the second drive means is arranged parallel to the axis. The first drive device is expediently so mounted on the second drive device that the first Shaft of the first drive means arranged parallel to the axis is. According to a further embodiment, the axis is arranged on the housing side, so that the bearing block pivots about the axis. He can be beneficial Be part of a bottom assembly of the housing. Is the pivot axis the second drive means concentric with the shaft of the second Drive device formed, can advantageously be the bearing block be rigid.

The aforementioned features allow a particularly simple conversion of a conventional household laundry dryer, which is provided with a single drive means for driving the laundry drum and the fan. To provide a separate drive means for driving the laundry drum, a further motor can be mounted on the motor housing of the motor for the fan wheel in this case. The motor for the fan is kept pivotable and is tensioned by means of a tension spring to maintain a belt tension. This clamping device can also be used in the proposed solution: By the another motor for driving the laundry drum is mounted on the motor housing of the motor for the fan, this is also pivotally supported and biased by the tension spring, so that the belt tension is maintained.

To a further embodiment, the first drive means a mounted on the first shaft pulley and a pulley, wherein the pulley is mounted so that the belt pulley wraps around with a wrap angle of at least 120 °. This will be one undesirable Slippage of the belt avoided.

The first drive means can by means of an adapter on the second Drive device to be mounted. This facilitates the assembly and further reduces production costs.

at the adapter can be z. B. one on a motor housing of second drive device mounted mounting rail and on a motor housing the first drive means attached corresponding profile act, which is insertable into the mounting rail. Furthermore, a Such adapters include a screw with which the through, the rail and the profile made connection can be secured. The adapter may also be a device, with which the engine of the first drive means under utilization the contour of the motor housing the second drive device can be mounted. In this Case may be the engine case the second drive device remain unchanged.

The Return means can be a tension spring, on the one hand. on the housing, preferably the floor assembly, and on the other hand on one of the drive means, preferably the second drive means, or is attached to the adapter. To Another design feature is a separate control Driving the first and second drive means provided. The first and / or the second drive device may have a 4-pole Have asynchronous motor, in which to change the speed using the controller can be switched on each two poles. A such control leaves easy and inexpensive to implement.

following is an embodiment of the invention with reference to the single drawing explained in more detail.

In the figure is a first electric motor 1 by means of an adapter indicated schematically here 2 fixed with a second electric motor 3 connected. At the electric motors 1 . 3 it may be asynchronous motors in which by means of a (not shown here) control two poles are switchable. The first electric motor 1 is on his first wave 4 with a pulley 5 provided to the a belt 6 for driving a laundry drum 7 is guided. To increase the wrap angle of the pulley 5 may be provided (not shown here) pulley, which, for example, on the first electric motor 1 is appropriate.

The second electric motor 3 In the embodiment shown in the figure is advantageously pivotable about the axis passing through the shaft 10 is represented in a bearing block 9 held. The bearing block 9 may be part of a floor assembly, which is advantageously made of injection-molded plastic. The second wave 10 reaches through the bearing block 9 and is supported by it by means of bearings. At both ends is the shaft 10 each with a fan 12a . 12b Mistake. The one fan 12a serves the operation of a cold air blower, the other fan 12b the circulation of the moisture-laden hot air through a (not shown here) heat exchanger.

A tension spring 13 is on a (not shown here) housing or the bottom assembly (not shown here) of the household tumble dryer and the first electric motor 1 appropriate.

By means of the tension spring 13 gets out of the first electric motor 1 and the second electric motor 3 existing arrangement around the pivot axis passing through the shaft 10 is formed, in the direction of the tension spring 13 indicated arrow pivoted until the belt 6 is curious. The tension of the belt 6 is due to the action of the tension spring 13 maintained.

The proposed drive arrangement is particularly advantageous because only one bearing block 9 is necessary for their inclusion. It saves space. Furthermore, it is possible with the proposed arrangement, both the laundry drum 7 as well as the fan wheels 12a . 12b to control independently of each other. The electric motors 1 . 3 can have only half the power compared to the prior art solution with a single electric motor. Such electric motors have a smaller size. The proposed arrangement occupies little more space than a conventional arrangement with a single electric motor.

1

first electric motor

2

adapter

3

second electric motor

4

first wave

5

pulley

6

belt

7

washing drum

8th

axis

9

bearing block

10

second wave

11

Long hole

12a, 12b

impellers

13

mainspring

Claims (13)

Household laundry drier with a housing in which a first drive device ( 1 ) for driving a laundry drum ( 7 ) by means of a belt ( 6 ) and a second drive device ( 3 ) for driving at least one fan wheel ( 12a . 12b ), characterized in that the first drive means ( 1 ) on the second drive device ( 3 ) is mounted, and that the second drive means ( 3 ) for tensioning the belt ( 6 ) against the action of a return agent ( 13 ) about an axis ( 10 . 8th ) is formed pivotable. Household tumble dryer according to claim 1, wherein the second drive means ( 3 ) about an axis ( 8th ) is pivotable, wherein the axis ( 8th ) parallel to the shaft ( 10 ) of the second drive device ( 3 ) runs. Household laundry drier according to claim 1, characterized in that the second drive means ( 3 ) around the shaft ( 10 ) is formed pivotable. Household laundry drier according to one of the preceding claims, wherein the first drive device ( 1 ) so on the second drive device ( 3 ) is mounted, that a first wave ( 4 ) of the first drive device ( 1 ) parallel to the shaft ( 10 ) of the second drive device ( 3 ) is arranged. Household tumble dryer according to one of the preceding claims, wherein the axis ( 8th ) on the housing side in the region of a second drive device ( 3 ) bearing bearing blocks ( 9 ) runs. Household tumble dryer according to claim 5, wherein the bearing block ( 9 ) Is part of a bottom assembly of the housing. Household laundry drier according to one of the preceding claims, wherein the first drive device ( 1 ) one on the first wave ( 4 ) attached pulley ( 5 ) and a deflection roller, wherein the deflection roller is mounted so that the belt ( 6 ) the pulley ( 5 ) wraps around at a wrap angle of at least 120 °. Household laundry drier according to one of the preceding claims, wherein the first drive device ( 1 ) by means of an adapter ( 2 ) on the second drive device ( 3 ) is mounted. Household tumble dryer according to one of the preceding claims, wherein the return means comprises a tension spring ( 13 ), on the one hand on the housing and on the other hand on one of the drive means ( 1 . 3 ), or on the adapter ( 2 ) is attached. Household tumble dryer according to one of the preceding claims, wherein a control for separately driving the first ( 1 ) and second drive device ( 3 ) is provided. Household tumble dryer according to one of the preceding claims, wherein the first ( 1 ) and / or the second drive device ( 3 ) has a 4-pole asynchronous motor / s. household dryer according to any one of the preceding claims, wherein for changing the Speed of the asynchronous motors by means of the control two each Poles are switchable. Household laundry drier according to one of the preceding claims, characterized in that the second drive device ( 3 ) around the axis ( 10 ) and the axis ( 8th ) a limiting device for the pivoting movement of the second drive device ( 3 ).