DE1185347B - Arrangement for the elastic suspension of a motor blower unit in a vacuum cleaner housing - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Boarding school KL: A 471

Number:
File number:
Registration date:
Display day:

German KL: 34 c -5/70

1185 347
A35748Ic / 34c

November 13, 1957

January 14, 1965

The invention relates to household vacuum cleaners and relates to a suspension arrangement a horizontally directed motor fan unit in a vacuum cleaner housing, wherein the motor fan unit is suspended by means of a single, this concentrically enclosing elastic bearing.

In a known arrangement of this type, eight are distributed over the circumference of the motor fan unit short coil springs arranged, in pairs of one obliquely forward and one summarized obliquely rearwardly directed spring, the motor fan unit at four points of their Support the circumference against the housing. Such a storage is against wobbling movements of the motor fan unit relatively soft, so that between the sprung and unsprung parts in particular A relatively large amount of play is required on the impeller to avoid hitting one another will. The suspension requires a lot of space in the radial direction. Compared to tangential forces the spring action is very weak. The previously known suspension is also because of the many Individual parts are complex and require relatively long assembly times.

The invention is based on the object while avoiding the disadvantages of the previously known arrangement to create a simple and robust suspension that has a great elastic resilience in Circumferential direction compared to the synchronous slot frequency of the motor and compared to the suction coarse dirt arising asynchronous load surges of the fan possesses and at the same time effectively attenuates the sound waves transmitted from the motor fan unit to the suspension. This is of great importance in particular for hand-held vacuum cleaners, in which the motor fan unit containing housing attached to a housing during suction by the operator Handle is held directly and, as a result, vibrations transmitted by the housing and shocks are very uncomfortable for the operator.

According to the invention this is achieved in that the bearing consists of two concentrically arranged to one another elastic rings made of rubber od. Like. Of which one on the motor fan unit and the change is held axially immovable on the vacuum cleaner housing, and one facing each other Grooves of the rings mounted, formed into a closed ring curved helical spring, which is a has greater rigidity against radial compressive forces than the elastic rings.

Arrangement for the elastic suspension of a
Motor fan unit in one
Vacuum cleaner housing

Applicant:

Aktiebolaget Electrolux, Stockholm

Representative:

Dipl.-Ing. E. Jourdan, patent attorney,

Frankfurt / M., Freiherr-vom-Stein-Str. 18th

Named as inventor:

Anders Folke Napoleon Lindsjö;

Jean Ivan Ragnar Boivie, Stockholm

Claimed priority:

Sweden December 13, 1956 (11319)

It is useful, the camp, preferably on the entire circumference, with one of the inner ring to provide radially inwardly extending approach, which he has a circumferential groove Motor fan unit engages, the bearing at least approximately from one through the Focus of the motor fan unit extending radial plane is penetrated. By such a Arrangement, the stabilizing forces acting axially on the bearing are kept negligibly small, so that the elastic rings can be made of particularly flexible material.

To the helical spring, which is preferably made of metal, as well as possible in the axial direction between the Holding rings and effectively damping natural vibrations of the spring complement each other in a special way Training feature of the invention, the grooves in the elastic rings to one in cross section circular, the helical spring tightly enclosing recess.

The arrangement according to the invention offers the further advantage of a simple sealing connection between the motor fan unit and the housing over the entire circumference to create to subdivide the housing interior, for example, into a suction chamber and a pressure chamber. To this Purposes, according to a further feature of the invention, are the elastic rings over their entire length Circumference by a preferably on the front sides

409 768/36

Claims (1)

3 4 attached web wall sealingly connected to one another side of the fan 22 and a blow-out space 31 where the web wall is thinner than the rings on the pressure side of the fan, which is guided on the motor side is. gen end of the cover 25 against the blow-out space Further features and advantages of the invention opens 31, is subdivided. From the blow-out space 31 result from the description of one in FIGS. 5, the air flows through slots 32 into one of the schematic illustrated embodiment. It housing formed, vertically directed exhaust duct shows · 33 and comes from this through a with a F i g. 1 is a perspective view of the blow-out opening at the front, covered obliquely by the hinged grille 34, onto the one motor blower unit and a handle 36 attached to the one holder of a hand-held dust filter housing on the upper housing side.
Saugers, the bearing 27 is composed of an inner ring 37 F i g. 2 a partially in the suspension plane and an outer one arranged concentrically therewith Motor fan unit sectioned front view on ring 38 made of rubber or a similar elastic the housing of Fig. 1, material together, in semi-annular grooves F i g. 3 shows a longitudinal section through the vacuum cleaner 15, a helical spring preferably made of metal housing according to fig. 1 and 2. 39 between them over the entire circumference. The dust, preferably made of plastic. The helical spring has a greater rigidity Sucker housing 10 consists of an upper part 11 and as the rings 37, 38 and is of the semi-circular Lower part 12, which is almost completely enclosed by screws or similar grooves, so that liches are held together. The in-20 an axial displacement of the rings against each other Inside the housing is prevented by a partition 13 in. two superimposed chambers 14 and 15 and The inner ring 37 carries one on one end face divided, of which the lower chamber 14 is a bag- extends radially inwards over the entire circumference shaped dust filter 16 receives, while in the upper-extending extension 40, which in a circumferential groove In the chamber 15, a motor fan unit 17 is arranged in the motor-side cover 25 of the motor is. The parting plane of the housing 10 runs fan unit engages. This means that the warehouse is in parallel to the longitudinal direction of the motor fan unit in the axial direction with respect to the motor fan unit and to the direction of flow of the air in the filter 16, and it is ensured that the engine and, together with a horizontal axial fan unit, always remains in the center of gravity, level of the motor fan unit. The one front wall 30, which causes axial forces on the bearing to a large extent, verdes Housing 10 is to be avoided in the area of the lower part 12 and thus for the inner and hinged cover 18 is formed and contains an outer ring 37, 38 a particularly flexible Ma air inlet nozzle 19 for attaching one of the materials can be selected. Vacuum cleaner nozzle carrying suction tube (not the two rings 37 and 38 are shown on the suction). Inside the housing 10, 35 page closes on its entire circumference by one on their directly on the air inlet connection with its end faces attaching, in cross-section semicircular opening edge combine sealingly between the cover 18 and moderately arched web wall 42 sealingly with one another Ring-shaped support 20 formed by the housing bound and thereby form a coherent one clamped dust bag 16 on. Part in which the helical spring 39 from the motor The motor fan unit 17 is arranged so that 40 side is introduced. By means of the web wall, the motor 21 against which the inlet connection 19 is contained is achieved that the bearing at the same time points as a seal between the front wall, while the fan 22 acts with the motor fan unit and the housing. As its open suction side against the opposite from FIG. 3, the web wall 42 is directed towards the essential front wall. The partition 13 is lent thinner than the rings 37, 38, so that the end facing away from the inlet port 19 with 45 it does not transmit any bearing forces.
Provided openings 23 through which the outer ring 38 is, at least in part, of blow in the lower chamber 14 a negative pressure in the cross-section of U-shaped sheet metal strips lower generated and thereby the dust is bordered by the thickness to be cleaned, by means of which it is in the cross-section the surface through the mouthpiece and the suction also U-shaped clamp mount 28, tube into the bag-shaped dust filter 16, which is 50 29 held. At the height of the parting line between due to the suction from the upper and lower housing part 11, 12 acting on its outside, the outer self inflates, sucks. elastic ring 38 extending radially outwards On its circumference are the motor fan unit kenden pegs 44 which are supported in a tangential direction and the motor by two axially one behind the other against shell-shaped covers 24 and 25 provided on the housing parts 11, 12 and 55 supports 45, 46 and thereby encapsulated, which are held together in a sealing manner by the clamping bracket 26 rotating the bearing with respect to the housing 10. Prevent the cover on the engine side.
25 carries on its scope, for example in one of the Ra claims enforcing the focus of the motor fan unit:
dial plane, a bearing 27, with the help of which the motor 60 Blower unit in a half from the upper part 11 1st arrangement for hanging a horizontal and half of the motor fan unit formed and prepared by the lower part 12 in an annular conveyor sucker housing which represents a radial transverse wall like dust, the motor fan unit Migen clamp mount 28, 29 is held. This further by means of a single one, this concentrically around bearing described below acts at the same time as a seal 65 closing elastic bearing is suspended, between the motor fan unit and the the transverse characterized in that the bearing wall-forming clamp mount 28, 29, so that the two concentrically arranged from one another Upper chamber 15 in a suction arm 30 on the suction elastic rings (37, 38) made of rubber or the like. of which one (37) on the motor fan unit (17) and the other (38) on the vacuum cleaner housing (10) is held axially immovable, and one in mutually facing grooves of the Rings (37, 38) mounted helical spring (39) curved to form a closed ring is formed, which has a greater rigidity against radial compressive forces than the elastic rings (37, 38). 2. Arrangement according to claim 1, characterized in that the bearing (27), preferably over the entire circumference, with a shoulder extending radially from the inner ring (37) (40) engages in a circumferential groove (41) of the motor fan unit (17), the bearing (27) at least approximately from one running through the center of gravity of the motor fan unit (17) Radial plane is penetrated. 3. Arrangement according to claim 1 or 2, characterized in that the grooves in the elastic rings (37,38) to a circular cross-section, the helical spring (39) tight complete the surrounding recess. 4. Arrangement according to one or more of claims 1 to 3, characterized in that the elastic rings (37, 38) on their entire circumference by one preferably on the end faces attached web wall (42) which forms a piece with the rings and is connected to one another in a sealing manner are, the web wall is thinner than the rings. 5. Arrangement according to one or more of the preceding claims, characterized in that that the outer elastic ring (38) in an annular clamp mount (28,29) in the Housing (10) is held. 6. The arrangement according to claim 5, wherein the housing is divisible in a preferably horizontal axial plane of the motor fan unit, thereby characterized in that the bearing (27) between two semicircular clamping frame halves (28, 29) is clamped, wherein the clamping frame halves are U-shaped in profile. 7. Arrangement according to claim 6, characterized in that the outer elastic ring (38) at least partially bordered by sheet metal strips (43) with a U-shaped cross-section and of small thickness is. 8. Arrangement according to one or more of the preceding claims, characterized in that that the outer elastic ring (38) with at least one radially outwardly directed Pin (44) is provided, which the bearing (27) in the tangential direction against in the housing (10) arranged support (45, 46) is supported. Considered publications:
U.S. Patent No. 1,860,884. 1 sheet of drawings 409 768B6 1.65 © Bundesdruckerei Berlin