SE516035C2

SE516035C2 - Device for a vacuum cleaner

Info

Publication number: SE516035C2
Application number: SE0001070A
Authority: SE
Inventors: Stefan Carlsson
Original assignee: Electrolux Ab
Priority date: 2000-03-27
Filing date: 2000-03-27
Publication date: 2001-11-12
Also published as: SE0001070D0; AU2001239629A1; EP1272090A1; WO2001072197A1; SE0001070L

Abstract

This invention relates to a device for a vacuum cleaner comprising a fan which is driven by an electric motor, the motor being encapsulated in a motor housing (10) comprising a hood shaped part (11) or the like and at least one side wall part (12) or the like intended to be joined to one another when the motor is assembled. The hood shaped part (11) as well as the side wall part (12) each are provided with a spacing (15, 16) for taking up a ball bearing (14, 16) supporting the shaft (13) of the electric motor and an abutting surface (18, 19) cooperating with an outer ring (14a, 16a) of said ball bearing (14, 16) in order to press the two ball bearings towards one another, the hood shaped part (11) and the side wall part (12) being provided with cooperating abutting surfaces (26, 27). The abutting surfaces (26, 27) will, when the electric motor is mounted in the motor housing and under the influence of small pressing forces between the hood shaped part (11) and the side wall part (12), not get in touch with one another but are at final assembly forced to join one another. The material stresses created in the side wall part and/or the hood shaped part (11 and 12 resp) are thereby taken up as a spring movement in the material.

Description

n.»;: 516 oss oo.- n 2 uppbär dammsugarens icke visade ﬂäkt, är dels lagrad i ett första lager 14 som är anordnat i en ﬁcka eller ett utrymme 15 i den kåpformade delen 11 och dels i ett andra lager 16 som är anordnat i en ﬁcka eller ett utrymme 17 i gavelpartiet 12. Det i den kåpformade delen 11 anordnade utrymmet 15 begränsas delvis av en ringformad ﬂäns 18 som utgör en del av kåpan och som är avsedd att anligga mot det första kullagrets 14 ytterring l4a under det att gavelpartiets 12 utrymme 17 på motsvarande sätt delvis begränsas av en ytterligare ringformad ﬂäns 19 avsedd att anligga mot det andra kullagrets 16 ytterring 16a. Kullagrens innerringar 14b resp 16b anligger mot ett varsitt anslag 20 resp 21 på axeln eller är ﬁxerade på axeln 13 på något lämpligt sätt. n. »;: 516 oss oo.- n 2 carries the vacuum cleaner's not shown ﬂ genuine, is partly stored in a first layer 14 which is arranged in a box or a space 15 in the housing-shaped part 11 and partly in a second layer 16 which is arranged in a hole or a space 17 in the end portion 12. The space 15 arranged in the housing-shaped part 11 is limited in part by an annular shaft 18 which forms part of the housing and which is intended to abut against the outer ring 14a 14a of the first ball bearing 14 while the space 17 of the end portion 12 is correspondingly partly limited by an additional annular shaft 19 intended to abut against the outer ring 16a of the second ball bearing 16. The inner rings 14b and 16b of the ball bearings, respectively, abut against each stop 20 and 21, respectively, on the shaft or are axed on the shaft 13 in some suitable manner.

Den kåpformade delen 11 uppvisar ett utåtriktat, ringforrnatd ﬂänsparti 22 som är huvudsakligen parallellt med ett yttre ringformat randparti 23 på gavelpartiet 12. Flänspartiet 22 uppvisar ett antal hål 24 i vilka ett motsvarande antal från randpartiet 23 utskjutande vulster 25 införes under monteringen. Det ringformade ﬂänspartiet 22 liksom randpartiet 23 uppvisar samverkande anliggningsytor 26 rersp 27 som är avsedda att vid motorns montering pressas mot varandra med hjälp av ett antal skruvar 28 eller på något annat lämpligt sätt.The housing-shaped part 11 has an outwardly directed annular end portion 22 which is substantially parallel to an outer annular edge portion 23 of the end portion 12. The flange portion 22 has a number of holes 24 into which a corresponding number of beads 25 projecting from the edge portion 23 are inserted during assembly. The annular end portion 22 as well as the edge portion 23 have cooperating abutment surfaces 26 with rebates 27 which are intended to be pressed against each other during the mounting of the motor by means of a number of screws 28 or in some other suitable manner.

Montering av elmotorn i motorhuset går till på följande sätt. Elmotorn med sin motoraxel 13 och vidhängande kullager 14, 15 införes i den kåpformade delen 11 varvid kullagret 14 inpassas i utrymmet 15 så att ytterringen l4a kommer till anliggning mot ﬂänsen 18. Därefter centreras och påföres gavelpartiet 12 på motoraxelns 13 andra ände så att kullagret 16 införes i utrymmet 17. Vid fortsatt förskjutning av gavelpartiet 12 i riktning mot den kåpformade delen ll bringas vulsterna 25 att ingripa med hålen 24. Fortsatt förskjutning av delarna 11 och 12 i förhållande till varandra medför att kullagrets 16 ytterring kommer till anliggning mot ﬂänsen 19 innan anliggningsytorna 26 och 27 på ﬂänspartiet 22 och randpartiet 23 kommer i kontakt med varandra. Detta medför att det bildas en spalt mellan sagda ytor 26,27. Därefter ﬂxeras gavelpartiet 12 vid den kåpformade delen 11 medelst skruvarna 27 eller på något annat lämpligt sätt vilket medför att anliggningsytorna 26 resp 27 kommer att pressas samman så att spalten försvinner. Detta innebär i sin tur att det uppstår materialspänningar i gavelpartiet och i den kåpformade delen 11, vilka är utförda i något lämpligt elastiskt material såsom plåt eller plast, varvid dessa materialspänningar i sin tur orsakar axiellt riktade sammanpressande krafter på de båda kullagren. Genom att välja spaltens storlek på lämpligt sätt med hänsyn till det valda materialet och dimensionerna på gavelpartiet -|»lv 516 oss 3 resp den kåpforrnade delen kan lämliga inspänningskraﬁer åstadkommas i syﬁe att ge lagren den nödvändiga livslängden.Installation of the electric motor in the motor housing is done as follows. The electric motor with its motor shaft 13 and attached ball bearings 14, 15 is inserted into the housing-shaped part 11, the ball bearing 14 being fitted in the space 15 so that the outer ring 14a abuts against the shaft 18. Thereafter the end portion 12 is centered and applied to the other end of the motor shaft 13 is inserted into the space 17. When the end portion 12 continues to be displaced in the direction of the cap-shaped part 11, the beads 25 are brought into engagement with the holes 24. Continued displacement of the parts 11 and 12 relative to each other means that the outer ring of the ball bearing 16 abuts the abutment surfaces 26 and 27 on the end portion 22 and the edge portion 23 come into contact with each other. This causes a gap to be formed between said surfaces 26,27. Thereafter, the end portion 12 of the cap-shaped part 11 is xxerated by means of the screws 27 or in some other suitable manner, which means that the abutment surfaces 26 and 27, respectively, will be compressed so that the gap disappears. This in turn means that material stresses arise in the end portion and in the housing-shaped part 11, which are made of any suitable elastic material such as sheet metal or plastic, these material stresses in turn causing axially directed compressive forces on the two ball bearings. By choosing the size of the gap in a suitable manner with regard to the selected material and the dimensions of the end portion - | »lv 516 oss 3 or the housing-shaped part, suitable clamping requirements can be achieved in order to give the bearings the necessary service life.

Det skall i sammanhanget sägas att det inom uppﬁnningens ram givetvis är möjligt att utforma den kåpformade och/eller gavelpartiet på en mängd olika sätt så länge någon del av det motorn omgivande motorhuset genom sin ﬂexibilitet åstadkommer en lämplig inspänningskraft på kullagren.In this context, it should be said that within the scope of the invention it is of course possible to design the housing-shaped and / or end portion in a variety of ways as long as any part of the motor housing surrounding the motor through its flexibility provides a suitable clamping force on the ball bearings.

Claims

nia »- 516 us Patent claim

A device for a vacuum cleaner which comprises a ﬂ shaft driven by an electric motor, the electric motor being encapsulated in a motor housing (10) consisting of at least one housing-shaped part (11) or the like. and at least one end portion (12) el.dy1. intended to be connected to each other in connection with the assembly of the electric motor, the housing-shaped part (11) as well as the end portion (12) each having a space (15, 16) intended to receive a ball bearing (14, 16) which supports the shaft (13) of the electric motor and on the other hand a pressing surface (18, 19) which cooperates with the outer ring (14a, 16a) of said ball bearings (14, 16) in order to press the two ball bearings in the direction of each other during assembly and wherein both the housing-turned-away part (11) 12) has cooperating abutment surfaces (26,27), characterized in that the abutment surfaces (26,27) when the electric motor is mounted in the motor housing and during the application of small compressive forces between the housing-shaped part (11) and the end portion (12) do not come into contact with each other but which during the final assembly are made to connect to each other, whereby the resulting material stresses in the end portion and / or the housing-shaped part (11 and 12, respectively) are absorbed as a resilient movement in the material.

Device according to claim 1, characterized in that the housing-shaped part and / or the end portion (11 and 12, respectively) are made of sheet metal or plastic.

Device according to one of the preceding claims, characterized in that the housing-shaped part (1 1) and / or the end portion (12) have a device intended to accommodate said ball bearings (14, 16).

Device according to Claim 3, characterized in that the pocket is delimited by an annular shaft (18, 19) integrated with the cover-shaped part or the end portion (18, 19) which is intended to abut against the outer ring (14a, 16a) of the ball bearing. '

Device according to one of the preceding claims, characterized in that the housing-shaped part (11) as well as the end portion (12) have substantially uniform shapes (22, 23) which have said abutment surfaces (26, 27).

Device according to claim 5, characterized in that the shaped portions (22, 23) are provided with means (24, 25) by means of which the cap-shaped part (1 1) and the end portion (12) are centered relative to each other. -. »N | 516 us 5

Device according to claim 6, characterized in that said means (24,25) consists of protruding beads or the like on the one-shaped portion. etc. and openings or the like formed on the other ﬂ-shaped portion.

Device according to Claim 6 or 7, characterized in that the housing-shaped part (11) and the end portion (12) are connected to one another by means of joints (28) engaging in the shaped parts.