DE4321216A1 - Motor and component mounting for electrical appliances, in particular vacuum cleaners - Google Patents

Abstract

The invention relates to a solution for mounting the motor and other components within electrical appliances, in particular vacuum cleaners and small and domestic electrical appliances. It is intended to replace costly solutions, such as those according to the prior art, and furthermore to contribute to improving usefulness. The motor or the component which is to be accommodated in the housing is accommodated with a slight push fit in a moulding made of thermoplastic foam material. The external contours of the moulding correspond to those of the interior of the housing of the associated electrical appliance. <IMAGE>

Description

The invention relates to an engine and component storage Vacuum cleaners and comparable electrical small or Household appliances.

The area of application is also in other areas of technology expandable where motors or drive units or others Components are safe and also low-noise and low-vibration must be stored, for example in electroacoustics.

The prior art provides various solutions to Motors, in particular motor fan units, and other components in electrical appliances, especially in vacuum cleaners, safely and to be stored quietly in the device housing.

The motor fan units are either radial or axial in Housing arranged.

The holding and bearing elements also attack accordingly. It spring elements come into contact with vibration-absorbing support elements for use. Furthermore, ring seals or support rings are axially or used radially, the drive part in particular Should protect moisture, but also storage and take over noise insulation functions.

The motor fan unit is preloaded accordingly on the sealing ring.

Engine mounts with the help of are also known elastic molded parts. However, they only attack partially and therefore increased design and manufacturing costs require in terms of bracket.

The motor fan unit is held in the housing itself either between the housing walls or within by Partitions formed areas. Combinations are also known. The partitions are mostly vibration-damped towards the housing.

It is also proposed that the engine fan unit in To accommodate retaining rings, which then by means of the mentioned Measures against the device housing against vibration damping this are arranged.

Pre-shaped elastic damping is used to dampen vibrations elements, mainly made of rubber, are provided. With vacuum cleaners with square retaining ring to hold the motor fan unit are elastic pockets that are pre-tensioned, located in the corners of the retaining ring.

Finally, it is proposed to make the housing walls from one to produce foamed material from a Reinforcement insert stabilized and outside of is surrounded by skin. The reinforcement insert is used for Inclusion of aggregates.  

The above solutions are based on the number of used Seen components too expensive and in many cases have that Economical limit reached. This also applies analogously for the manufacturing side, especially the effort for the provision of molds.

The susceptibility to failure is due to the multitude of used components too high.

Therefore, the state of the art is unable to provide the To solve the task, namely a bearing of the engine and / or other components within electrical devices, in particular Vacuum cleaners and small electrical and household appliances, too develop that is capable of the following Meeting demands in the complex:

• - Positioned motor bracket in the housing;
• - Safe absorption of static and dynamic forces;
• - Improved damping of engine and fan vibrations;
• - reduction of structure-borne and airborne noise;
• - Fluidic optimization of the air flow;
• - Drastic reduction in the number of components.

The aim is to achieve that the production of Vacuum cleaners or other electrical devices essential can be done more economically. The value in use should be increased due to weight reduction and better noise and Vibration damping.

According to the invention, the aforementioned object is achieved as follows: The motor or that in an electrical device, especially in one Vacuum cleaner or another electrical small or Household appliance, component to be accommodated is with a press fit in one Molded part made of thermoplastic foam embedded. It is the motor is also conceivable and even advantageous for vacuum cleaners via work units firmly connected to it, for example a blower, to be stored indirectly in the molded part. To this end the molding is provided with a blind hole, which in its Depth corresponds at least to the length of the possible press fit. The outer contours of the molded part are analogous to those of the Housing interior designed in such a way that the molding can also be used with a press fit in the housing can.

The molding is, if necessary, with appropriate Provide openings, openings, channels and the like. for example for air routing, for connections and Cable entries.  

The molded part expediently consists of foamed Polypropylene or a material with equivalent properties. If necessary, it can be composed of individual segments become.

The invention is illustrated by the example of a vacuum cleaner explained.

The accompanying drawing shows the mounting of an engine blower unit, consisting of the engine 2 and the blower 1 , in the engine compartment of a vacuum cleaner.

The central component is a molded part 7 made of foamed polypropylene. Its outer contour corresponds to the inner contour of the engine compartment and is provided with a blind hole for receiving the engine blower unit. The blower side is first fully inserted into the blind hole. The blind hole diameter is slightly smaller than that of the blower 1 , so that there is a slight interference fit, which guarantees a secure fit on the blower side. This complies with the hysteresis of the polypropylene foam.

The depth of the blind hole is chosen so that the The entire length of the motor blower unit is included becomes.

In order to ensure a secure fit of the molded part 7 in the engine compartment, a light press fit is also provided for this.

On the fan side, the molded part 7 bears against a partition 8 which separates the engine compartment and the suction compartment 11 from one another. In this area it has an opening 10 for the intake air. To discharge the exhaust air, further openings 9 are located in the area of the pressure chamber 12 in the jacket of the molded part 7 .

If necessary, additional openings, openings, Channels and the like are provided, for example, connections or cable entries.

On the motor side, the motor blower unit is supported by means of a rubber bearing 4 , which at the same time ensures security against rotation.

Optionally, the molded part 7 can be lined with a film 5 in the area of the pressure chamber 12 .

Reference list

1 blower
2 engine
3 housing
4 rubber bearings
5 slide
6 engine casing
7 molding
8 partition
9 opening
10 opening
11 suction chamber
12 pressure chamber

Claims (6)

1. Motor and component storage for electrical devices, in particular vacuum cleaners, characterized in that the motor ( 2 ), optionally via fixed working units, for example a blower ( 1 ), and / or another component with a press fit in a molded part ( 7 ) is made of thermoplastic foam, the shape of the molded part ( 7 ) corresponds to that of the housing interior, which is available for the motor ( 2 ) or the component to be accommodated, and is also fitted with a press fit in this. 2. Engine and component storage according to claim 1, characterized in that the molded part ( 7 ) is composed of individual segments. 3. Engine and component storage according to claim 1, characterized in that the molded part ( 7 ) consists of foamed polypropylene or a material with equivalent properties. 4. Motor mounting according to claim 1, wherein the motor is designed as a motor blower unit for a vacuum cleaner, characterized in that the shaped part ( 7 ) has a blind hole in which the motor blower unit with the blower side is first inserted in its entire length, that the shaped part ( 7 ) on the fan side on the partition ( 8 ) to the suction chamber ( 11 ) and that it is provided in this area with an opening ( 10 ) for the intake air, and that in the molded part ( 7 ) openings ( 9 ) circumferentially in the area of the pressure chamber ( 12 ) are provided for the exhaust air and, if necessary, further openings, channels or guides. 5. Motor mounting according to claim 4, characterized in that the motor-side mounting of the motor fan unit by means of rubber bearings ( 4 ) is realized against rotation. 6. Engine mounting according to claim 4, characterized in that the molded part ( 7 ) in the region of the pressure chamber ( 12 ) is lined with a film ( 5 ) or coated in a suitable manner.