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EP0043538A2 - Saugventilator für einen Staubsauger - Google Patents

Saugventilator für einen Staubsauger Download PDF

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Publication number
EP0043538A2
EP0043538A2 EP81105056A EP81105056A EP0043538A2 EP 0043538 A2 EP0043538 A2 EP 0043538A2 EP 81105056 A EP81105056 A EP 81105056A EP 81105056 A EP81105056 A EP 81105056A EP 0043538 A2 EP0043538 A2 EP 0043538A2
Authority
EP
European Patent Office
Prior art keywords
producing unit
bearing
set forth
armature
suction producing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP81105056A
Other languages
English (en)
French (fr)
Other versions
EP0043538A3 (de
Inventor
Rudolph W. Wacek
Jonathan Miller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shop Vac Corp
Original Assignee
Shop Vac Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shop Vac Corp filed Critical Shop Vac Corp
Publication of EP0043538A2 publication Critical patent/EP0043538A2/de
Publication of EP0043538A3 publication Critical patent/EP0043538A3/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans

Definitions

  • This invention relates to electric fans in general and more particularly relates to a suction producing unit for a vacuum cleaner.
  • U.S. Patent No. 2,778,563 issued January 22, 1957, to D.I. Doyle for a Vacuum and Blower Producer discloses a vertically disposed cylindrical tank having a pancake-type electric fan axially disposed at the top of the tank for producing suction within the tank. -The instant invention is directed to an electric fan of this type.
  • the instant invention provides a fan motor having an armature rotatable about a vertical axis defined by upper.and lower bearings mounted to respective upper and lower housing sections.
  • the lower bearing is essentially fixed while the upper bearing is mounted on a swivel support.
  • the latter is formed by a spring retainer which is secured to the upper housing section and form parts of a subassembly.
  • the spring retainer provides a concave seat for the upper bearing and also biases it upward against a concave seating surface of the upper housing.
  • the lower housing section is provided with integrally formed tubular supports for brushes engaging the commutator for the armature.
  • the outer ends of the brush supports are covered by snap-held removable plastic caps.
  • insulating sleeves on the fan-blade end of the motor shaft and an insulating clamping unit electxically insulate the motor from the fan blade and housing therefor.
  • the primary object of the instant invention is to provide a novel relatively inexpensive and reliable suction producing unit for a vacuum cleaner.
  • Another object is to provide a suction producing unit of this type so constructed that assembly thereof is facilitated.
  • Still another object is to provide a suction producing unit of this type constructed so as to minimize the possibility of electrical shock.
  • Suction producing unit 20 of Figure 1 includes an electric motor comprising rotatable armature 21 surrounded by stator field piece 22.
  • stator windings 23, 24 Figure 2 are magnetically coupled with pole piece 22.
  • the axis of rotation for armature 21 is defined by vertical shaft 25 which extends beyond both ends of armature 21 and is rotatably supported by upper and lower bearings 26, 27 respectively.
  • Magnetic frame or field piece 22 is sandwiched between upper and lower housing sections 28, 29 which are connected by two screws 31 which extend vertically downward through clearance apertures in frame 22..
  • upper housing section 28 is an inverted U-shaped member having vertical legs 32, 33 which extend downward from opposite ends of web 34.
  • the free ends of legs 32, 33 are provided with respective out-turned ears 38, 39 having the respective clearance apertures 36, 37 through which screws 31 extend.
  • Outboard of clearance aperture 36, ear 38 is provided with another aperture 41 to receive a grounding screw (not shown).
  • the underside of web 34 is provided with concave seating surface 42 which is engaged by upper bearing 26.
  • the periphery of ring-like spring retainer 43 is seated on shoulder 46 at the underside of web 34 and is secured to upper housing 28 by peening over portion 47 of web 34 disposed in the vicinity of shoulder 46.
  • Spring member 43 is provided with upwardly facing concave seating surface 44 which is in engagement with upper bearing 26.
  • Spring 43 biases upper bearing 26 upward against seating surface 42, and seating surfaces 42, 44 permit upper bearing 26 to swivel as required. This enables bearing 26 to rotatably support the upper end of shaft 25 which extends into an axial aperture of bearing 26.
  • Inverted cup-like cap 50 ( Figures 10 and 11) is secured to upper housing 28 by two screws 49 which are received in threaded engagement in apertures 48 in web 34 after passing through clearance apertures 51 in the disk-like upper surface 52 of cap 50.
  • Surface 52 is also provided with a plurality of ventilating openings 53 through which air is drawn downward by fan blade 55 which is disposed within cap 50 and is secured to the upper end of shaft 25 just below upper bearing 26.
  • Sleeve 54 on the upper end of shaft 25 operatively positions blade 55. Air moved by the latter serves to cool motor 21, 22.
  • lower housing 29 is a molded insulating member formed having main cylindrical portion 61 concentric with motor shaft 25.
  • Flange 62 which extends radially inward from the lower end of main section 61, is provided with central opening 63 through which the lower end of shaft 25 extends.
  • Surrounding opening 63 is upwardly extending lip 64 which positions lower bearing 27.
  • the latter is a ball bearing unit whose inner race is closely fitted with respect to shaft 25.
  • Corrugated tolerance ring 65 is interposed between lip 64 and.the outer race of bearing 27.
  • Flange 62 and flange 66 extending radially outward from main section 61, form the upper boundary for shallow chamber 67 wherein suction fan blade 70 is disposed.
  • Lower housing 29 also includes post formations 71, 71 adjacent the inner surface of main section 61. Posts 71 are provided with recesses 72 open at the their upper ends to threadably receive screws 31.
  • Brush supports 73, 73 are formed integrally with and extend radially through main section 61.
  • Each support 73 is of generally rectangular cross-section having a through passage 76 which receives brass holder 74 for carbon brush 75. The latter is biased into engagement with commutator 77 mounted on shaft 25 and electrically connected to the windings of armature 21.
  • Brass holders 74 are electrically connected to field windings 23, 24.
  • a coiled compression spring (not shown) disposed within holder 74 biases brush 75 radially inward into good electrical contact with commutator 77.
  • the outer end of passage 76 is closed by inwardly Bending tabs (not shown) on opposite sides of brass holder 74.
  • Plastic cap 78 covers the outer end of support 73, being removably held in operative position by four snap-fitted fingers 79. Below each of the brush supports 73, main cylindrical section 61 is provided with apertures 81 which provide outlets for air moved radially by lower fan blade 55 to cool motor 21, 22.
  • the end of field winding 23 remote from brush 75 is connected to electrical lead 151 and the end of field winding 24 remote from the other brush 75 is connected to electrical lead 152.
  • Leads 151, 152 extend radially outward of lower housing 29 through notch 153 ( Figure 4) in main section 61. Leads 151, 152 are maintained at the bottom of notch 153 by generally H-shaped molded plastic clamping member 155 (Figs. 4, 6 and 7) which is locked in position from above by field piece 22.
  • Sponge-like ring 200 cemented to the upper surface of 66 provides a gasket for a cover (not shown) placed over motor 21, 22.
  • flange 66 Extending downward from flange 66 are three posts 82 which rest against the upper surface of motor support 83.
  • the latter provides the lower boundary for chamber 67 and is provided with upwardly extending spacer projections 84 in the vicinity of each of the posts 82.
  • Screws (not shoivn) extend upward through clearance apertures in support 83 and are received in apertures 86 of post 82 to mechanically secure lower housing 29 to support 83.
  • Support 83 is also provided with upwardly extending annular lip 85 which forms the side boundary for chamber 67. However, there is a gap 87 between the upper end of lip 85 and lower housing 29, with this gap 87 providing a narrow exhaust opening for radially moving air generated by rotating fan 70.
  • Support 83 is provided with central opening 88 surrounded by upwardly extending shallow lip 89 and downwardly extending cylindrical section 91. Cylinder 91 and lip 89 serve to axially direct air being drawn into fan 70.
  • the latter is secured to shaft 25 by flanged nut 92 whose threads are engaged with the threads at the lower end of shaft 25.
  • Flanged spacer 93 on shaft 25 is interposed between fan wall 95 and the inner race of bearing 27 on shaft 25. Wall section 95 of fan 70 is clamped between flanged spacer 93 and lower washer 96 as nut 92 is tightened against the latter.
  • motor support 83 is mounted to the top of the vacuum tank 97 shown in phantom in Figure 1.
  • Figure 14 illustrates another embodiment of the instant invention which is similar to the embodiment of Figure 1 but differs therefrom by having a different upper housing construction and a lower shaft connection which provides superior insulation.
  • upper housing 105 is a molded plastic member which combines the functions of metal upper housing 28 and cap 5Q.
  • Upper housing 105 provides the cylindrical upper seat 106 for upper bearings 26.
  • Spring retainer 107 is secured in operative position by ring 108 having outwardly extending ears 109 each of which is provided with a clearance aperture 111 through which a screw 112 extends. The latter is received in threaded engagement in a recess of upper housing 105.
  • the lower end of shaft 25 extends through insulating sleeve 121 having outer shoulder 122 which abuts the top of bearing 27.
  • Sleeve 121 extends below bearing 27 into insulating spacer sleeve 123. The latter extends through central aperture 63 at the bottom of lower housing 29 and through the central aperture in fan blade wall 95.
  • the central portion of sleeve 123 is provided with radially outward circular flange 124 positioned below lower housing inward flange 62 and adjacent the upper surface of fan wall 95.
  • Rubber-like washer 127 surrounds sleeve 123 and abuts the lower surface of wall 95.
  • Insulating flanged cap nut 130 having threaded insert 131 is mounted on the threaded lower end of shaft 25 and is provided with a recess wherein washer 127 is disposed. Tightening of cap nut 130 clamps fan wall 95 between washer 127 and flange 124. At the same time sleeve 123 is forced upward into abutment with the tapered diameter of sleeve 121 and the lower surface of bearing unit 27.

Landscapes

  • Motor Or Generator Frames (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
EP81105056A 1980-07-09 1981-06-30 Saugventilator für einen Staubsauger Withdrawn EP0043538A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16681080A 1980-07-09 1980-07-09
US166810 1980-07-09

Publications (2)

Publication Number Publication Date
EP0043538A2 true EP0043538A2 (de) 1982-01-13
EP0043538A3 EP0043538A3 (de) 1983-03-16

Family

ID=22604782

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105056A Withdrawn EP0043538A3 (de) 1980-07-09 1981-06-30 Saugventilator für einen Staubsauger

Country Status (3)

Country Link
EP (1) EP0043538A3 (de)
AU (1) AU7260281A (de)
DK (1) DK303581A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140218A (en) * 1983-05-20 1984-11-21 Rau Swf Autozubehoer Electric motor
GB2154073A (en) * 1982-01-08 1985-08-29 Black & Decker Inc Improvements in or relating to electric motors and components therefor
GB2219144A (en) * 1988-05-25 1989-11-29 Johnson Electric Ind Mfg Securing bearing in electric motor frame
EP0930040A2 (de) * 1998-01-20 1999-07-21 Tennant Company Geräuscharmes Sauggebläse
US6224340B1 (en) 1998-02-20 2001-05-01 Black & Decker, Inc. Fan Retention system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103388589B (zh) * 2013-02-04 2015-09-30 山东精工泵业有限公司 立式水环真空泵

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175551A1 (de) * 1972-03-14 1973-10-26 Moulinex Sa
US4110644A (en) * 1976-08-02 1978-08-29 Emerson Electric Co. Dynamoelectric machine end shield arrangement
US4109978A (en) * 1976-10-14 1978-08-29 Electric Machinery Mfg. Co. Electrically insulated sleeve bearing and method of making same
US4111615A (en) * 1975-06-18 1978-09-05 Matsushita Electric Industrial Company, Limited Fluid exhausting device
DE2811014A1 (de) * 1978-03-14 1979-09-20 Siemens Ag Geblaeseaggregat fuer einen staubsauger
FR2472294A1 (fr) * 1979-12-21 1981-06-26 Vorwerk Co Interholding Dispositif de montage de l'arbre du rotor de moteurs electriques, equipe d'une helice de ventilateur

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175551A1 (de) * 1972-03-14 1973-10-26 Moulinex Sa
US4111615A (en) * 1975-06-18 1978-09-05 Matsushita Electric Industrial Company, Limited Fluid exhausting device
US4110644A (en) * 1976-08-02 1978-08-29 Emerson Electric Co. Dynamoelectric machine end shield arrangement
US4109978A (en) * 1976-10-14 1978-08-29 Electric Machinery Mfg. Co. Electrically insulated sleeve bearing and method of making same
DE2811014A1 (de) * 1978-03-14 1979-09-20 Siemens Ag Geblaeseaggregat fuer einen staubsauger
FR2472294A1 (fr) * 1979-12-21 1981-06-26 Vorwerk Co Interholding Dispositif de montage de l'arbre du rotor de moteurs electriques, equipe d'une helice de ventilateur

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154073A (en) * 1982-01-08 1985-08-29 Black & Decker Inc Improvements in or relating to electric motors and components therefor
GB2140218A (en) * 1983-05-20 1984-11-21 Rau Swf Autozubehoer Electric motor
GB2219144A (en) * 1988-05-25 1989-11-29 Johnson Electric Ind Mfg Securing bearing in electric motor frame
EP0930040A2 (de) * 1998-01-20 1999-07-21 Tennant Company Geräuscharmes Sauggebläse
EP0930040A3 (de) * 1998-01-20 1999-10-06 Tennant Company Geräuscharmes Sauggebläse
US6224340B1 (en) 1998-02-20 2001-05-01 Black & Decker, Inc. Fan Retention system

Also Published As

Publication number Publication date
DK303581A (da) 1982-01-10
AU7260281A (en) 1982-01-14
EP0043538A3 (de) 1983-03-16

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Inventor name: MILLER, JONATHAN

Inventor name: WACEK, RUDOLPH W.