DE884888C - Bearing sleeve for high-speed spindles, especially for electric hand grinders - Google Patents
Bearing sleeve for high-speed spindles, especially for electric hand grindersInfo
- Publication number
- DE884888C DE884888C DEB17546A DEB0017546A DE884888C DE 884888 C DE884888 C DE 884888C DE B17546 A DEB17546 A DE B17546A DE B0017546 A DEB0017546 A DE B0017546A DE 884888 C DE884888 C DE 884888C
- Authority
- DE
- Germany
- Prior art keywords
- bearing
- bearing sleeve
- outer ring
- spindle
- clamping
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/02—Driving main working members
- B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles
- B23Q5/043—Accessories for spindle drives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
- B23Q1/262—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members with means to adjust the distance between the relatively slidable members
- B23Q1/265—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members with means to adjust the distance between the relatively slidable members between rotating members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
Description
Die Erfindung_bezieht sich auf Lagerhülsen für hochtourige Spindeln von motorisch angetriebenen Handwerkzeugmaschinen, insbesondere von Handschleifern, in deren sich als Handgriff sowie als Einspannfläche eignendem Hals mindestens ein Außenring eines der Wälzlager für die Spindel eingepaßt ist.The invention relates to bearing sleeves for high-speed spindles of motor-driven hand machine tools, especially hand grinders, in their neck, which is suitable as a handle and as a clamping surface, at least one Outer ring of one of the rolling bearings for the spindle is fitted.
Bei Werkzeugspindeln mit einer Leerlaufdrehzahl von 30 ooo bis 6o ooo Umdrehungen je Minute sind die Spindellager außerordentlich gefährdet. Es hat sich bei den bekannten Lagerhülsen der beschriebenen Art gezeigt, daß trotz sorgfältigster Bearbeitung der Lagersitze häufig schon nach kurzer Laufzeit Lagerschäden eintreten, obwohl keine äußeren Ursachen erkennbar warenwährend andere Spindeln der gleichen Art überhaupt keine Spuren irgendeiner Beanspruchung zeigten.For tool spindles with an idle speed of 30,000 to 6,000 The spindle bearings are extremely endangered by ooo revolutions per minute. It has shown in the known bearing sleeves of the type described that despite the most careful Machining of the bearing seats, bearing damage often occurs after a short period of time, although no external causes were discernible, while other spindles did the same Art showed no signs of any stress at all.
Es konnte festgestellt werden, daß der größte Teil derartiger Lagerschäden auf die Art der Aufspannüng der Handwerkzeugmaschine zurückzuführen ist.It was found that the majority of such bearing damage is due to the type of Aufspannüng the hand tool.
Wenn man nämlich die Werkzeugmaschine möglichst nahe am werkzeugseitigen Ende der Lagerhülse einspannt, damit der Abstand der Arbeitsfläche des Werkzeugs, z. B. eines Schleifkörpers, von der Einspannstelle möglichst kurz wird, so wirken die von den verwendeten Spannmitteln auf die Lagerhülse ausgeübten Spannkräfte auch auf das am -werkzeugseitigen Ende der Hülse angeordnete Wälzlager der Spindel ein. Dadurch kann der meist recht schwache Außenring des Wälzlagers verformt werden was selbst dann zu einer raschen Zerstörung des -Wälzlagers bei den hohen Drehzahlen führt, wenn diese Verformung ganz geringfügig war.Namely, if the machine tool is as close as possible to the tool-side The end of the bearing sleeve is clamped so that the distance between the working surface of the tool, z. B. a grinding wheel, from the clamping point is as short as possible, so act the clamping forces exerted on the bearing sleeve by the clamping devices used on the roller bearing of the spindle arranged on the tool-side end of the sleeve. As a result, the outer ring of the rolling bearing, which is usually quite weak, can be deformed even then to a rapid destruction of the roller bearing at the high speeds leads when this deformation was very minor.
Um eine derartige Einspannung der Lagerhülse von vornherein.' unmöglich zu machen, wird die Außenfläche der Lagerhülse gemäß- der Erfindung so ausgebildet, daß die Handgriff- und Einspannflache des Halses der Lagerhülse in .der Zone des Wälzlageraußenringes abgesetzt ist, um eine Übertragung des Einspanndruckes auf den Außenring zu vermeiden.To such a clamping of the bearing sleeve from the start. ' not possible to make, the outer surface of the bearing sleeve according to the invention is designed so that the handle and clamping surface of the neck of the bearing sleeve in .der zone of the Rolling bearing outer ring is offset to a transfer of the clamping pressure to avoid the outer ring.
Bei einer bevorzugten Ausführungsform, bei welcher der gegen den Einspanndruck zu schützende Außenring am werkzeugseitigen Hülsenende eingespannt ist, ist die Außenfläche des Halses am Hülsenende konisch abgesetzt.In a preferred embodiment, in which the against the clamping pressure the outer ring to be protected is clamped at the tool-side sleeve end is the The outer surface of the neck is tapered off at the end of the sleeve.
In der Zeichnung ist als Ausführungsbeispiel die Spindellagerhülse eines elektrischen Handschleifers dargestellt, und zwar in Fig. i im Längsschnitt mit eingebauter Schleifspindel und in Big. 2 in Vorderansicht.In the drawing, the spindle bearing sleeve is an exemplary embodiment an electric hand grinder, namely in Fig. i in longitudinal section with built-in grinding spindle and in Big. 2 in front view.
Die Spindellagerhülse i i ist aus einem Stück geformt und umgibt die Schleifspindel 12 auf dem größten Teil ihrer Länge. An ihrem werkzeugseitigen Ende ist in einer feingepaßten Bohrung 13 der Außenring 14 eines Kugellagers eingepreßt, dessen innere Lauffläche 15 in die Spindel 1a eingeschliffen ist. Ein auf der Antriebsseite der Spindel befindliches Kugellager hat ebenfalls eine in die Spindel eingeschliffene Innenlauffläche 16, während der Außenring 17 so befestigt ist, daß ein bei der Herstellung der Spindel und ihrer Lager, wenn auch nur in, einer Größenanordnung von ,etwa io p, verursachter Längsschlag der Spindel federnd aufgenommen wird. Diesem Zweck dient eine membranartige Federscheibe i9, in welcher ein Paßring 18 zur Aufnahme des Außenrings 17 befestigt ist.The spindle bearing sleeve ii is molded in one piece and surrounds the grinding spindle 12 over the greater part of its length. At its end on the tool side, the outer ring 14 of a ball bearing is pressed into a precision-fitted bore 13, the inner running surface 15 of which is ground into the spindle 1a. A ball bearing located on the drive side of the spindle also has an inner running surface 16 ground into the spindle, while the outer ring 17 is fastened in such a way that, when the spindle and its bearings are manufactured, a size range of about 10 p, caused longitudinal stroke of the spindle is resiliently absorbed. A membrane-like spring washer 19, in which a fitting ring 18 for receiving the outer ring 17 is fastened, is used for this purpose.
Zwischen dem werkzeugseitigen und dem antriebseitigen Spindellager weist die Spindellagerhülse einen Hals auf, der sich sowohl als Handgriff bei freihändiger Arbeitsweise eignet als auch als Einspannschaft dient, wenn der Handschleifer beispielsweise auf dem Support einer Drehbank festgespannt wird. Der für das Einspannen geeignete Abschnitt des Halses reicht nicht bis an denjenigen Abschnitt der Lagerhülse heran, in welchem der werkzeugseitige Kugellageraußenring 14 eingespannt ist. In dieser Zone ist die Lagerhülse an ihrer Außenfläche konisch abgesetzt, und zwar über eine solche Länge; daß zwischen der Einspannstelle und dem Außenring 14 wenigstens ein Abstand gewahrt wird, der etwa dem Durchmesser des Außenrings 14 entspricht.Between the tool-side and the drive-side spindle bearing the spindle bearing sleeve has a neck that can be used as a handle when freehanded The way it works is suitable as well as being used as a clamping shank, for example when the hand grinder is used is clamped on the support of a lathe. The one suitable for clamping The section of the neck does not reach that section of the bearing sleeve in which the tool-side ball bearing outer ring 14 is clamped. In this Zone, the bearing sleeve is set off conically on its outer surface, over a such length; that between the clamping point and the outer ring 14 at least one Distance is maintained which corresponds approximately to the diameter of the outer ring 14.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEB17546A DE884888C (en) | 1951-11-10 | 1951-11-11 | Bearing sleeve for high-speed spindles, especially for electric hand grinders |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE306726X | 1951-11-10 | ||
DEB17546A DE884888C (en) | 1951-11-10 | 1951-11-11 | Bearing sleeve for high-speed spindles, especially for electric hand grinders |
Publications (1)
Publication Number | Publication Date |
---|---|
DE884888C true DE884888C (en) | 1953-07-30 |
Family
ID=25790276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB17546A Expired DE884888C (en) | 1951-11-10 | 1951-11-11 | Bearing sleeve for high-speed spindles, especially for electric hand grinders |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE884888C (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3028106A1 (en) * | 1980-07-18 | 1982-02-11 | F. Jos. Lamb Co., Warren, Mich. | BEARING ARRANGEMENT FOR MACHINE TOOL SPINDLES |
DE3414774A1 (en) * | 1983-04-22 | 1984-10-31 | Alfa Laval Separation Ab | BEARING FOR A ROTATING SPINDLE |
DE3330862A1 (en) * | 1983-08-26 | 1985-03-14 | Magyar Optikai Müvek, Budapest | Self-adjusting shaft construction |
DE1632289C1 (en) * | 1967-07-31 | 1991-11-07 | Kernverfahrenstechnik Gmbh | Axial bearings for high-speed shafts |
DE19818634A1 (en) * | 1998-04-25 | 1999-11-04 | Weck Manfred | Movable bearing for e.g. spindles and shafts |
DE19818633A1 (en) * | 1998-04-25 | 1999-11-11 | Weck Manfred | Sleeve for holding outer rings of axially tensioned bearing packet supporting shaft or spindle |
-
1951
- 1951-11-11 DE DEB17546A patent/DE884888C/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1632289C1 (en) * | 1967-07-31 | 1991-11-07 | Kernverfahrenstechnik Gmbh | Axial bearings for high-speed shafts |
DE3028106A1 (en) * | 1980-07-18 | 1982-02-11 | F. Jos. Lamb Co., Warren, Mich. | BEARING ARRANGEMENT FOR MACHINE TOOL SPINDLES |
FR2493206A1 (en) * | 1980-07-18 | 1982-05-07 | Lamb Co F Jos | APPARATUS FOR APPLYING A LOAD PRIOR TO THE MACHINE TOOL PIN SUPPORT BEARINGS |
DE3414774A1 (en) * | 1983-04-22 | 1984-10-31 | Alfa Laval Separation Ab | BEARING FOR A ROTATING SPINDLE |
DE3330862A1 (en) * | 1983-08-26 | 1985-03-14 | Magyar Optikai Müvek, Budapest | Self-adjusting shaft construction |
DE19818634A1 (en) * | 1998-04-25 | 1999-11-04 | Weck Manfred | Movable bearing for e.g. spindles and shafts |
DE19818633A1 (en) * | 1998-04-25 | 1999-11-11 | Weck Manfred | Sleeve for holding outer rings of axially tensioned bearing packet supporting shaft or spindle |
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