TWI629967B - Household appliance, in particular attachment appliance for a vacuum cleaner - Google Patents

Abstract

The present invention relates to an attachment for a household appliance, particularly a vacuum cleaner, comprising an appliance housing comprising a motor supported in the appliance housing and having a motor shaft and a motor housing, The first end extends to a second end that is parallel to the direction of extension of the motor shaft, the motor shaft being supported therein. In order to produce a noise reduction caused by an appliance during operation, the present invention provides a sleeve through which the entire motor housing is fixed in a torque-proof manner in the appliance housing. Between the outer side of the motor housing and the inner side of the appliance housing, wherein the sleeve is at least partially comprised of an elastomeric material having a modulus of elasticity that is less than the elasticity of the material of the appliance housing and/or the motor housing Modulus. The invention further relates to a household appliance, in particular a vacuum cleaner, comprising an appliance as an attachment means.

Description

Household appliances, especially vacuum cleaner attachments Field of invention

The present invention relates to an attachment for a household appliance, particularly a vacuum cleaner, comprising an appliance housing comprising a motor supported in the appliance housing and having a motor shaft and a motor housing, The first end extends to a second end that is parallel to the direction of extension of the motor shaft, the motor shaft being supported therein. The invention is further related to a device, in particular a vacuum cleaner, comprising an appliance as an attachment means.

According to the invention, one of the electrical devices for the vacuuming surface, such as the mouthpiece, or the entire device used for the vacuuming surface, is understood to be a household appliance. For this device, an example of a household device, hereinafter, is also referred to as a vacuum cleaner. Thus, a so-called floor nozzle is used for floor cleaning, in particular hard floors or carpets. In principle, the cushions or the like can also be individually vacuumed in the so-called top surface area by means of a general household appliance or attachment.

In principle, for the purposes of the present invention, the terms of the household appliance are not only related to the vacuum cleaner or the attachment of the vacuum cleaner, but also include any type of electrical household appliance, for example, also including a cleaning window or the like. Class of appliances. However, the vacuum cleaner will still be used primarily as a reference in an exemplary manner, as this is a preferred application. According to the invention, the term "cleaner" is not limited to electric household vacuum cleaners, but also includes automated movable appliances, especially floor cleaning robots.

Background of the invention

As described above, for example, a vacuum cleaner, the attachment means are typically embodied for a particular floor to be cleaned, that is, having a special attachment means, for example, which is specifically designed for carpet cleaning And other attachments that are specifically designed for vacuuming hard floors. Floor nozzles, which can be adjusted and thus feasible for cleaning different floors, are also well known in the prior art. In the attachment means described above, preferably for cleaning carpets, it is known to provide a driven brush body, for example a brush roller comprising bristles disposed on a brush shaft. The brush roller is typically powered by an electric motor having a motor shaft supported in a motor housing, one end of which is provided with a sprocket which in turn drives a drive wheel via a tooth The belt is attached to the brush roller in a twist-proof manner. The rotation of the motor shaft is transmitted to the brush body, which body thus rotates.

It is well known to insert the motor into a bearing that is welded to the bottom portion (chassis) of the appliance housing of the attachment device, wherein the motor is positioned by the side facing the side of the toothed belt. The cartridge is supported against the outer casing of the appliance. The rigid foam segments or strands are used to direct the air inside the appliance casing, respectively. a bearing for a motor made of a hard material, which is used for The anti-twist mode secures the motor in the housing of the appliance, which is well known from another prior art.

One problem that has arisen in the prior art is that the motor transmits vibration to the appliance housing, resulting in relatively high noise in response to actuation of the household appliance.

Summary of invention

Based on this, it is an object of the present invention to provide a household appliance of the aforementioned type which is capable of reducing the noise generated during operation.

An appliance, in particular a vacuum cleaner attachment device, for example, a household vacuum cleaner, comprising an appliance housing comprising a motor, in particular an electric motor, supported in the appliance housing and having a motor shaft and a motor housing extending from a first end to a second end in parallel with the direction of extension of the motor shaft (orientation of the axis of rotation) and wherein the motor shaft is supported, the above purpose of derivation and designation is solved a sleeve through which the entire motor housing is fixed in a torque-proof manner, the sleeve being disposed between the outer side of the motor housing and the inner side of the appliance housing, wherein The sleeve is at least partially, in particular completely, composed of an elastic material having a modulus of elasticity that is less than the modulus of elasticity of the material of the appliance housing and/or the motor housing.

In contrast to the prior art, according to the present invention, the entire motor housing is supported in the sleeve and the sleeve is used not only to fasten the front end of the motor housing in the appliance housing. The sleeve thus constitutes a decoupling element for the entire motor.

A sleeve is understood to be the casing of the motor for protecting and stabilizing the motor inside the appliance casing. By means of the sleeve, the motor can be arranged in the housing of the appliance in a manner that is anti-rotation and in particular in an axial and/or radial immovable manner, that is to say in the non-working state and in particular also in the operation. During this contact, the relative movement between the outer surface of the motor housing and the inner surface of the sleeve at the point of contact, and the outer surface of the sleeve and the inner surface of the appliance housing may not occur. In principle, however, due to the resilient material of the sleeve, a slight relative movement between the motor housing and the housing of the appliance is possible, whereby vibration is more difficult to transfer from the motor housing to the appliance housing, or on the one hand In this case, it is prevented and thereby, and vice versa, it is more difficult to occur or on the other hand it can be prevented from being caused by impact or vibration, individually acting on the household appliance from the outside (for example The power transmission when the household appliance is rudely placed on the surface to be cleaned, when in use.

A further advantage of the sleeve provided in accordance with the present invention is that the motor can be configured with a custom assembled sleeve prior to installation into the household appliance, and thus can be inserted into the appliance housing in a single step as a pre- Assemble components (structural units). The reliable assembly of the motor in the housing of the appliance and the decoupling associated with vibration and shock are simultaneously achieved. In particular, when it is a one-piece plastic part, for example, an injection molded part, the sleeve can also be configured in a simple manner (for example, a recessed portion and/or a protruding portion), on the one hand, ensuring a response The customized assembly referred to after assembly, on the other hand, can also have the purpose of directing the flow of air through the appliance housing for cooling purposes.

Different specific embodiments of the household appliance of the present invention will now be described in detail below.

According to a specific embodiment of the household appliance of the present invention, the elastic modulus of the elastic material of the sleeve is preferably at least 10 times, preferably at least less than 20 times, the modulus of elasticity of the material of the appliance casing and/or the motor casing. It is particularly preferably at least less than 50 times. In this way it is in particular ensured that the motor is decoupled by the effective vibration of the appliance housing, wherein the motor can still be fixed in the appliance housing simultaneously in a stable manner. The selected modulus of elasticity of the elastomeric material of the sleeve, which preferably constitutes the entire sleeve, also ensures a rigid component that surrounds the motor, such that the components comprise a portion of the elastomeric material of the sleeve The modulus of elasticity is a high modulus of elasticity. For example, the lower portion of the appliance housing (chassis) or the upper portion of the appliance housing (cover) is not damaged in response to a large impact or vibration.

For example, the sleeve is at least partially, in particular completely, composed of a material, in particular a plastic, preferably an elastomer, comprising an elastic modulus of at most 500 N/mm ² . In particular, the elastic modulus of the Department of bits by a range of 1 to 250N / mm ^2, preferably position by a range of 5 to 150N / mm ^2, in particular preferred position by a 10 to 100N / mm ² of In the scope. Plastics, when subjected to a tensile or compressive load, are dimensionally stable, but at the same time elastically deformable, which is understood to be an elastomer. After being deflected (deformed) from the original shape, the elastomer assumes its original shape again after it is released again. A material comprising the elastic modulus has proven to be particularly suitable on the one hand to compensate for vibrations or shocks, and on the other hand to ensure that the motor is firmly held in the appliance housing.

According to a further embodiment of the household appliance according to the invention, the sleeve extends over at least half of the circumference of the motor casing, preferably over at least three quarters of the circumference, particularly preferably across the entire circumference . In addition or in an alternative arrangement, the sleeve can extend over at least half of the length of the motor casing, preferably over at least three quarters of the length, particularly preferably across the entire length, wherein the length It means that the first end portion to the second end portion are parallel to the extending direction of the motor shaft. The casing of the motor casing constructed by the sleeve is further retained within the casing of the appliance to an optimum extent and to achieve vibrational decoupling in all areas and/or directions of the motor casing.

According to still another further embodiment of the household appliance of the present invention, the sleeve is comprised of at least two sleeve portions that are at least partially detachable from one another. For example, the sleeve portions can be embodied as a half-shell portion that surrounds the motor housing in the proper insertion state of the motor as described above. In order to be able to insert the motor into the sleeve, the sleeve portions can be disengaged from each other whereby the interior of the sleeve is freely accessible. When the sleeve portions are at least partially detached from one another, for example via at least one hinge element, it consists in particular of the same material as the rest of the sleeve. The sleeve portions are in particular pivotable relative to each other, preferably with respect to a shaft, which is parallel to the direction of extension of the motor shaft. The sleeve can thus be opened, for example, to enable the motor to be taken out one after the other, for example for maintenance or repair purposes.

According to yet a further embodiment of the household appliance of the invention, the sleeve is embodied in one piece (i.e., integrally formed into one piece). In addition Or in an alternative arrangement, at least two sleeve portions, in particular the half shell portions of the sleeve, are connected to each other in one piece. The at least one hinge element can also be connected to the remainder of the sleeve in one piece. It is capable of producing a one-piece design and is also assembled in a particularly simple manner.

According to still another embodiment of the household appliance of the present invention, the motor has a power transmission module. An example of a power transmission module has been described above. According to the present invention, a power transmission module includes at least one transmission wheel, in particular a sprocket, which is connected to the motor shaft and a driven wheel in a torque-proof manner, in particular a belt gear and a casing. And/or surrounding the drive wheel and/or the driven wheel. If the drive wheel does not contact or drive the driven wheel, individually, if the drive train is spaced apart from the driven wheel, in particular perpendicular to the direction of extension of the motor shaft, the belt, in particular the tooth, can be further prepared A belt that connects the drive wheel to the driven wheel. The toothed belt can also be surrounded by the casing. According to this embodiment, the casing is surrounded by the sleeve or consists of the sleeve. In this latter case, the casing can be attached to the remainder of the sleeve in one piece. The power transmission module is also optimally protected and vibration decoupled by the housing.

According to still another further embodiment of the household appliance of the present invention, at least one radial opening is prepared in the sleeve that connects the interior of the sleeve to the outside of the sleeve. Radially means that the opening faces in a direction perpendicular to the direction in which the motor shaft extends. Preferably, a plurality of openings are prepared. Through the openings, the motor housing is exposed to the outer boundary of the sleeve or exposed to the interior of the appliance housing, individually and optimally cooled at the locations.

Preferably, the cooling channel, which can be partially constructed by the sleeve, is also embodied to optimize cooling. According to a further embodiment, at least two openings, in particular radial openings, are provided in the sleeve, wherein at least one (inner) cooling channel through which air flows or through which air can flow, individually, and The passage connects the two openings or the two openings, individually and interconnected, and is embodied between the outer side of the motor housing and the inner side of the sleeve.

In addition or in an alternative arrangement, at least one (outer) cooling channel through which air flows or through which air can flow, individually and in particular, is connected to at least one (inner) cooling channel, The two openings in the sleeve are interconnected and disposed between the outer side of the sleeve and the inner side of the appliance housing. In particular, the appliance housing also has at least two openings, each opening being connected to an (outer) cooling passage of the aforementioned type, which thus extends between the outside of the sleeve and the inside of the appliance housing.

The cooling channels or individual segments of the cooling channels, individually, can be arranged in such a manner to separate the air path generated within the appliance housing for the intake and exhaust gases. Airflow can be directed through the motor during operation of the household appliance and particularly during operation of the motor via the corresponding cooling passages, thereby ensuring heat exchange and cooling of the motor.

According to still another embodiment of the household appliance of the present invention, the sleeve has at least one protruding portion that is at least partially rotated in the circumferential direction on the inner side and/or the outer side (extending around the motor shaft) The direction of the direction), in particular at least one rib and/or at least one recessed portion, In particular, at least one groove that rotates at least partially in the circumferential direction. For example, a groove can also be disposed in a rib, for example, in the radially outer (rotating) portion of the rib. In one aspect, the recessed portions or grooves, individually, can be used to secure the sleeve axially and/or radially to corresponding projections in the appliance housing. The motor housing can also be fixed axially and/or radially in the same way inside the sleeve. On the other hand, the recessed portions can, in principle, also be used to form the cooling channels. The same applies to the mentioned projections or ribs, individually, which can also be used to axially and/or radially secure the sleeve to the appliance housing and/or to fix the motor housing to the The sleeve and/or supply and transfer cooling air.

According to yet a further embodiment of the household appliance according to the invention, the final preparation is between the motor housing and the sleeve and/or between the sleeve and the appliance housing without a play, ie in the axial direction (motor shaft Extending direction) and / or in the radial direction. Due to the elasticity of the material of the sleeve, although it is connected, it also ensures optimum vibration decoupling, which is free of play. The motor is still held in the housing of the appliance in a stable manner.

Moreover, this object is solved by a device, in particular a vacuum cleaner (home vacuum cleaner), including a previously defined type of household appliance as an attachment.

According to the invention, a sleeve, as defined above, in a household appliance, in particular a special shape and/or a special material, which has the added advantage of already mentioned advantages, is prepared. It is thus also possible to provide the accessibility of the interior of the appliance housing in a simple manner by means of the special sleeve, since, for example, the successively provided foam segments or strands are not separately arranged without hindrance. To date, the latter has also disadvantages, which are now avoided by the present invention, that is, individual components that need to be detached from each other for maintenance or repair purposes may inadvertently stick to each other. A further advantage is that no additional components are required for vibration decoupling and storage. The number of components is thus reduced and the assembly is simplified by the invention, which also reduces costs. At the same time, the motor is not only vibration decoupling, but also reduces noise due to the material of the sleeve, further reducing noise formation. Due to the material of the sleeve, the strength of the household appliance is also significantly increased. As already stated, the cooling passages, which are formed by corresponding projections and/or recessed portions of the sleeve, also have the further advantage of effectively preventing overheating of the motor. Due to the material of the sleeve, which is relatively dimensionally stable, the motor always obtains sufficient cooling or fresh ambient air, respectively.

1‧‧‧Household appliances, especially attachments

2‧‧‧vacuum cleaners, such as household vacuum cleaners

3‧‧‧ appliance housing

4‧‧‧Motor

5‧‧‧Motor shaft

6‧‧‧Motor housing

7‧‧‧Sleeve

7a, 7b‧‧‧ sleeve part

8‧‧‧Power transmission module

9a‧‧‧Transmission wheels, especially toothed belts

9b‧‧‧ driven wheel

10‧‧‧shell

11‧‧‧ Opening in the sleeve

12‧‧‧ Opening in the sleeve

13‧‧‧ Opening in the sleeve

14‧‧‧(inner) cooling channel

15‧‧‧ (outside) cooling channel

16‧‧‧ (inside) protruding parts, especially ribs

17‧‧‧ (outside) protruding parts, especially ribs

18‧‧‧ recessed parts, especially grooves

19‧‧‧Base device for vacuum cleaner

20‧‧‧Dust collection room

21‧‧‧ cable

22‧‧‧ 具具

23‧‧‧Handle

24‧‧‧ brush body

25‧‧‧floor

26‧‧‧ Appliance parts

X‧‧‧ extending direction

x ₁ ‧‧‧ pivot axis between sleeve parts

U‧‧‧ circumferential direction

The possibilities for embodying and further forming the household appliance of the present invention as well as the household appliance of the present invention will now be described. In connection with this, reference is made to the scope of the patent application, which is hereby incorporated by reference in its entirety in its entirety in its entirety in the the the the the the the the In the drawings: Figure 1 shows a schematic perspective view of a household appliance in the form of a vacuum cleaner comprising a household appliance of the invention as an attachment means, and Figure 2a is shown for use in the household appliance of Figure 1. A schematic perspective view of the motor including an open sleeve, and Figure 2b shows a schematic perspective view of the motor from Figure 2a, including a closed sleeve, and 3 shows a schematic partial view of an exemplary embodiment that can be coupled to the vacuum cleaner of FIG. 1 and includes a suitably assembled motor and the sleeve that surrounds the motor.

Detailed description of the preferred embodiment

Figure 1 illustrates a vacuum cleaner 2, in particular a household appliance in the form of a powered household vacuum cleaner, as a preferred application of the household appliance 1 of the present invention. The cleaner 2 is embodied as a hand-operated stick. In the present exemplary embodiment, it has the provision that the vacuum cleaner 2 initially has a base unit 19 that preferably has an electric motor for use with a suction/blower unit. A dust collection chamber 20 provided for accommodating absorbed dust is attached to the base unit 19. The dust collection chamber preferably includes a dust filter bag (not shown).

The power source of the electric motor integrated in the base unit 19 is supplied via a cable 21 which also supplies electric power to the motor 4 which will be described below. According to an exemplary embodiment not shown, the electric motor 4 supplies power via a battery, whereby a cable 21 is thus not required.

A plug-in socket is further prepared on the base unit 19 for use by the appliance stick 22. The implement stick has a grip 23 on the end side.

In order to clean the floor, the base unit 19 is fluidly connected to an attachment means, which here constitutes the household appliance 1 of the invention. The attachment means is embodied in the form of a suction nozzle, here a floor nozzle. This particular embodiment shows a floor nozzle that includes an assembly that is supported for rotation within the body for use in the form of a brush body 24 for dust particles from the floor 25 loose and accommodate. The brush body 24 is generally schematically illustrated in phantom in Figure 1 and is disposed vertically below a portion 26 of the appliance housing 3 of Figure 3 that is open toward the floor 25.

As further seen in Fig. 3, the motor 4 surrounded by a sleeve 7 is coupled to the brush body 24 and driven via a power transmission module 8, as will be explained in more detail below.

The structural unit (pre-assembled assembly) of the motor 4 and the sleeve 7 is illustrated in Figure 3, in which it is inserted into the lower portion (chassis) of the appliance housing 24 and individually illustrated in the Figure In 2a and 2b, the sleeve 7 is open in Figure 2a and closed in Figure 2b.

The attachment or household appliance 1 illustrated separately in these figures comprises an appliance housing 3 and a motor 4 supported in the appliance housing 3 in the form of an electric motor. The motor 4 has a motor shaft 5 and a motor housing 6 extending parallel to the direction X of extension of the motor shaft 5 from a first end to a second end, the motor shaft 5 being supported therein. On the rear end portion of the motor 4 (in Fig. 2a), the motor shaft 5, in turn, is coupled to a drive wheel 9a in the form of a sprocket, which is driven by a toothed belt (not shown). Moving wheel 9b. The drive wheel, the driven wheel and the toothed belt are surrounded by a casing 10, wherein the transmission wheel 9a, the driven wheel 9b, the toothed belt and the casing 10 constitute the power transmission module 8 as a whole, which has been mentioned above.

As particularly illustrated in Figures 2a, 2b and 3, a sleeve 7 is divided into two pieces through which the entire motor housing 6 is fixed in a twist-proof manner and axially and radially immovably. The appliance casing 3 is disposed between the outer side of the motor casing 6 and the inner side of the appliance casing 3. In the exemplary embodiment, the sleeve is entirely composed of an elastic material, which is an elastomer having a modulus of elasticity that is less than the modulus of elasticity of the material of the surrounding device housing 3 and the motor housing 6. Here, for example, the elastic modulus is 100 N/mm ² .

As shown in Figure 2a, wherein the sleeve 7 is comprised of two sleeve portions 7a and 7b that are partially detachable from each other and are capable of pivoting (opening and closing) relative to each other, i.e., relative to an axis x ₁ , The shafting is parallel to the direction X of extension of the motor shaft 5. Figure 2a shows the open state and Figure 2b shows the closed state.

It can be seen in Figures 2b and 3 that the sleeve 7 extends across the entire circumference of the motor housing 6 and across the entire length of the motor housing 6, thus completely surrounding the motor housing 6 at least in the circumferential direction U. . The only exceptions are a plurality of radial openings 11, 12 and 13 which are recessed in the material of the sleeve 7 and which are used to cool the motor 4. Thereby, in the properly installed state, in the side of the sleeve 7 on the bottom, a separate larger radial opening 11 is prepared, while being placed on the side of the top in a properly installed state. Prepare additional openings 12 and 13. The motor housing 6 is exposed to the outer periphery of the sleeve 7 or exposed to the interior of the appliance housing 3 via the openings 11, 12 and 13, respectively, wherein in each case the openings 12 and 13 constitute an internal cooling The end point of the passage 14 (i.e., located inside the sleeve) is distributed between the outer side of the motor casing 6 and the inner side of the sleeve 7. Thus, in each case the opening 12 is an air inlet opening and the opening 13 is an exhaust opening. As can be seen in Figure 3, in this case of an exemplary embodiment of the invention, a pair of openings 12 and 13 are prepared in the left half in each case and A corresponding inner cooling passage 14 and a pre-assembled assembly of the motor 4 and sleeve 7 are prepared in the right half.

The inner cooling passages 14 are connected to the outer cooling passages 15 (i.e., located outside the sleeve), in each case being embodied on the outer side of the sleeve 7 and the outer casing 3 of the appliance Inside the room. As can be seen in FIG. 3, a first outer cooling passage 15 is provided on the front side, which guides the cooling air from the bottom side of the household appliance 1 through a (not shown) disposed in the appliance housing 3. The opening enters the individual opening 12 and is transferred therethrough to the individual inner cooling passage 14 to the individual opening 13. Thereby, the cooling air, which is subsequently heated, is laterally discharged by the household appliance 1 as an exhaust through another external cooling passage and another (not shown) opening in the appliance casing 3. In Fig. 3, only the bottom portion of the appliance casing 3, the so-called chassis, is illustrated. The upper portion, the so-called cover, has additional elements that form the outer cooling passages 15 described and separately direct the intake to the individual openings 12 or to accurately vent the exhaust Wait for the opening 13 to discharge.

The sleeve 7 of the present invention is embodied as a single piece having a plurality of projections 16 or 17, individually rotated in the circumferential direction U, and a concave portion 18 which rotates in the circumferential direction U. Individually, in a manner that is anti-twisted and immovable in the axial and radial directions, it is at least partially used to secure the motor 4 in the sleeve 7, or to fix the sleeve 7 to the appliance housing 3 Medium, and/or at least partially used to direct air and to materialize the illustrated cooling passages 14 and 15.

Additional household appliance segments (projecting portions and/or recessed portions) that complete the outer cooling passages 15 are embodied in the appliance housing 3.

The sleeve 7 described above ensures a connection between the motor housing 6 and the sleeve 7 and between the sleeve 7 and the appliance housing 3 without play. At the same time, the sleeve 7 has a function of vibration decoupling and a function of forming a cooling passage. The sleeve 7, which is used in accordance with the present invention, is thus an integral molded component that combines different functions.

Claims (19)

A household appliance, in particular a vacuum cleaner attachment device, comprising an appliance housing, comprising a motor supported in the appliance housing and having a motor shaft and a motor housing, the motor housing One end portion extends to a second end portion parallel to the extending direction of the motor shaft, and the motor shaft is supported in the motor housing, wherein a sleeve is disposed on an outer side of the motor housing and the appliance housing Between the inner sides, and the entire motor casing is fixed in the appliance casing via the sleeve in a torque-proof manner, wherein the sleeve is at least partially composed of an elastic material having a modulus of elasticity smaller than the casing of the appliance And/or a modulus of elasticity of the material of the motor housing, wherein the sleeve is comprised of at least two sleeve portions that are at least partially detachable from each other and are pivotable relative to one another about an axis, The shaft is parallel to the direction in which the motor shaft extends. The household appliance of claim 1, wherein the elastic modulus of the elastic material of the sleeve is at least 10 times greater than the elastic modulus of the material of the appliance housing and/or the motor housing. The household appliance of claim 2, wherein the elastic modulus of the elastic material of the sleeve is at least 20 times greater than the elastic modulus of the material of the appliance housing and/or the motor housing. The household appliance of claim 2, wherein the elastic modulus of the elastic material of the sleeve is smaller than the material of the appliance casing and/or the material of the motor casing The modulus of sex is at least 50 times. The household appliance of claim 1 or 2, wherein the sleeve is at least partially, in particular completely, composed of a material, in particular a plastic, comprising an elastic modulus of at most 500 N/mm ² , in particular, the elastic modulus The number is in a range from 1 to 250 N/mm ² . A household appliance according to claim 5, wherein the elastic modulus is in a range from 5 to 150 N/mm ² . A household appliance according to claim 6, wherein the elastic modulus is in a range from 10 to 100 N/mm ² . A household appliance according to claim 1, wherein the sleeve extends across at least half of the circumference of the motor housing and/or traverses at least half of the length of the motor housing. A household appliance according to claim 8 wherein the sleeve extends across at least three quarters of the circumference of the motor housing and/or across at least three quarters of the length of the motor housing. A household appliance according to claim 9 wherein the sleeve extends across the entire circumference of the motor housing and/or across the entire length of the motor housing. The household appliance of claim 1, wherein the two sleeve portions are connected to each other in at least a portion via at least one hinge member when at least partially detached from each other. A household appliance according to claim 1, wherein the sleeve is embodied in one piece, and/or at least two sleeve portions of the sleeve are integrally connected to each other. The household appliance of claim 1, wherein the motor has a power transmission mode a set comprising a drive wheel, in particular a sprocket, connected to the motor shaft in a torque-proof manner; a driven wheel, in particular a belt gear; and a casing supporting and/or surrounding the drive wheel And/or a driven wheel, wherein the casing is surrounded by or consists of the sleeve. A household appliance according to claim 1, wherein the sleeve is provided with at least one radial opening that connects the interior of the sleeve to the outside of the sleeve. The household appliance of claim 1, wherein the sleeve is provided with at least two openings, in particular radial openings, and at least one cooling passage connecting the two openings to each other is embodied outside the motor casing and Between the inside of the sleeve. The household appliance of claim 1, wherein the at least one cooling passage is specifically connected to at least one cooling passage that connects the two openings in the sleeve to each other, and is embodied on the outer side of the sleeve and the appliance housing Between the inner sides. The household appliance of claim 1, wherein the sleeve has at least one protruding portion that is at least partially rotated in the circumferential direction on the inner side and/or the outer side, in particular at least one rib; and/or at least one depression Part, in particular at least one groove, which rotates at least partially in the circumferential direction. The household appliance of claim 1 wherein there is no clearance between the motor housing and the sleeve and/or between the sleeve and the appliance housing. A household appliance, in particular a vacuum cleaner, comprising a household appliance as one of the items 1 to 18 as an attachment appliance.