DE8909144U1 - Bearing web for shaft bearings in hand-held power tools - Google Patents
Bearing web for shaft bearings in hand-held power toolsInfo
- Publication number
- DE8909144U1 DE8909144U1 DE8909144U DE8909144U DE8909144U1 DE 8909144 U1 DE8909144 U1 DE 8909144U1 DE 8909144 U DE8909144 U DE 8909144U DE 8909144 U DE8909144 U DE 8909144U DE 8909144 U1 DE8909144 U1 DE 8909144U1
- Authority
- DE
- Germany
- Prior art keywords
- bearing web
- bearing
- hand
- power tools
- held power
- 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
- 235000012773 waffles Nutrition 0.000 claims description 2
- 238000005553 drilling Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/02—Construction of casings, bodies or handles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
- B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- B25F5/008—Cooling means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
- H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drilling And Boring (AREA)
Description
Patent-Verwaltungs-GmbH Theodor-Stern-Kai 1, 6000 Frankfurt 1Patent-Verwaltungs-GmbH Theodor-Stern-Kai 1, 6000 Frankfurt 1
Lagersteg für die Wellenlagerung in handgeführten Elektrowerkzeugen Bearing web for shaft bearings in hand-held power tools
Die Erfindung betrifft einen Lagersteg für handgeftihrte Elektrowerk^euge gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a bearing bridge for hand-held power tools according to the preamble of claim 1.
Ein derartiger Lagersteg, der gegebenenfalls auch noch ein weiteres oder weitere '.agar aufnehmen kann, zählt zu den mechanisch hcehbeanspruchten Teilen ve:. Elektrowerkzeugen. Wegen Jer geforderten Einhaltung eines vorgegebenen Bsir'olumens sowie auch au* Kostencr-mden (verwendetes Lageriaatsrial ) kann es im Bereich des Lagerstegs zu ungünstigen Temp<;riii_/verhältnissen kommen.Such a bearing web, which can also accommodate another or more bearings, is one of the parts of power tools that are subject to high mechanical stress. Due to the requirement to maintain a specified volume and also for cost reasons (bearing material used), unfavorable temperature and humidity conditions can arise in the area of the bearing web.
Der Erfindung liegt die Aufgabe zugrunde, insbesondere in denjenigen Fällen, i; denen ein Verrippen des Lagerstegs aus Platzoder Kostengründen ausscheidet und/oder das verwendete Lagerstegmaverial hinsichtlich seines Wärmeabgabevermögens zu wünschen übrig läßt, die Wärmeabfuhr zu verbessern.The invention is based on the object of improving heat dissipation, particularly in those cases i; in which ribbing of the bearing web is not possible for reasons of space or cost and/or the bearing web material used leaves something to be desired in terms of its heat dissipation capacity.
Diese Aufgabe ist erfindungsgemäß durch die Maßnahmen gemäß dem kennzeichnenden Teil des Anspruchs 1 gelöst.This object is achieved according to the invention by the measures according to the characterizing part of claim 1.
Die Erfindung wird im nachstehenden anhand eines durch die Zeichnung veranschaulichten Ausführungsbeispiels erläutert.The invention is explained below using an embodiment illustrated in the drawing.
einer Schlagbohrmaschine mit einem Zweischalengehäuse, a hammer drill with a two-shell housing,
Fig. 2 eine Ansicht des Lagerstegs von der Motorseite der Bohrmaschine her,Fig. 2 a view of the bearing web from the motor side of the drilling machine,
Fig. 3 eine Ansicht des Lagerstegs von der Abtriebsseite der Bohrmaschine her,Fig. 3 a view of the bearing web from the output side of the drill,
Fig. 4 eine Seitenansicht des Lagerstegs gemäß den Figuren 2 und im Schnitt.Fig. 4 is a side view of the bearing web according to Figures 2 and in section.
Bei der Schlagbohrmaschine gemäß Fieur 1 ist in einer Bohrung 10 des aus Sintermaterial bestehenden Lagerstegs 11 die Ankerwelle M des Antriebsmotors 13 mittels eines Nadellagers 14 drehbar gelagert. In einer darüber befindlichen, parallel zur Bohrung 10 verlaufenden weiteren Bohrung 15 des Lagerstegs sitzl das hintere Lager 16 für die Arbeitsspindel 17, die abtriebsseitig in einem vorderen Lager 18 nochmals gelagert ist. Die beiden Lager 16 und 18 sind hier als Nadellager ausgebildet.In the impact drill according to Figure 1, the armature shaft M of the drive motor 13 is rotatably mounted in a bore 10 of the bearing web 11 made of sintered material by means of a needle bearing 14. In a further bore 15 of the bearing web located above it and running parallel to the bore 10, there is the rear bearing 16 for the work spindle 17, which is again mounted on the output side in a front bearing 18. The two bearings 16 and 18 are designed as needle bearings here.
Der Lagersteg 11 weist an seiner dem auf der Ankerwella 12 sitzenden Ventilator 19 zugewandten Seite eine nutförmige Ausnehmung 20 aufs die sich bis in das Innere der Bohrung 15 fortsetzt. In dieser Nut ist ein Schieber 21 geführt, dessen Nase 22 in eine am zylindrischen Teil 23' eines Betätigungsglieds 23 angebrachte Spiralnut 23" eingreift, so daß der Schieber 21 bei Drehung des Betätigungsglieds 23 je nach Drehrichtung in den rückwärtigen Bereich der Bohrung 1S eindringt oder sich aus diesem herausbewegt. Im ersten Fall wird eine Axialbewegung der Arbeitsspindel 17 und damit des mit dieser unmittelbar oder mittelbar vereinigten Bohrers unterbunden; so daß nur der Arbeitsgang Bohren ermöglicht wird. Im anderen Fall ist der Weg für eine Axialbewegung der Arbeitsspindel 17 frei, so daß Schlagbohrbetrieb möglich ist. Zu diesem Zweck ist der Lagersteg mit einem Nockenoder Rastenkranz 24 versehen, der m't einem Rastenkranz 25 (Gegenra'jtenkranz) korrespondiert, welcher *n der antriebssei iigen Stirnseite eines auf der Arbeitsspindel befindlichen Zahnrads 26 angebracht ist, das vom Ankerritzel 27 angetrieben wird.The bearing web 11 has on its side facing the fan 19 sitting on the armature shaft 12 a groove-shaped recess 20 which continues into the interior of the bore 15. A slide 21 is guided in this groove, the nose 22 of which engages in a spiral groove 23" attached to the cylindrical part 23' of an actuating member 23, so that the slide 21, when the actuating member 23 is rotated, penetrates into the rear area of the bore 1S or moves out of it, depending on the direction of rotation. In the first case, an axial movement of the work spindle 17 and thus of the drill directly or indirectly connected to it is prevented; so that only the drilling operation is possible. In the other case, the path for an axial movement of the work spindle 17 is free, so that impact drilling operation is possible. For this purpose, the bearing web is provided with a cam or ratchet ring 24, which corresponds to a ratchet ring 25 (counter-ratchet ring) which is attached to the drive-side face of a gear 26 located on the work spindle. which is driven by the armature pinion 27.
Der Lagersteg 11 ist an seiner dem Ventilator 19 zugeordneten Fläche mit einer Oberflächenvergrößernden Riffelung 28 versehen, die als Waffelmucter oder ähnlich ausgebildet sein kann.The bearing web 11 is provided on its surface associated with the fan 19 with a surface-enlarging corrugation 28, which can be designed as a waffle groove or similar.
&tgr;.-.&Lgr;.&ngr;.&tgr;.-.&Lgr;.&ngr;.
II »»
Die entsprechende Ansicht des Lagerstegs zeigt Figur 2. Neben der Riffelung 28 ist hieraus auch die Bohrung 10 für das getriebeseitige Lager der Ankerwelle und die nut^örmige Ausnehmung für den Schieber 23 ersichtlich.The corresponding view of the bearing web is shown in Figure 2. In addition to the corrugation 28, the bore 10 for the gear-side bearing of the armature shaft and the groove-shaped recess for the slide 23 can also be seen.
Aus den Figuren 3 und 4 ist der Nocken- bzw. Rastenkranz 24 besondern deutlich zu entnehmen.The cam or detent ring 24 can be seen particularly clearly in Figures 3 and 4.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8909144U DE8909144U1 (en) | 1989-07-28 | 1989-07-28 | Bearing web for shaft bearings in hand-held power tools |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8909144U DE8909144U1 (en) | 1989-07-28 | 1989-07-28 | Bearing web for shaft bearings in hand-held power tools |
Publications (1)
Publication Number | Publication Date |
---|---|
DE8909144U1 true DE8909144U1 (en) | 1989-09-28 |
Family
ID=6841500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8909144U Expired DE8909144U1 (en) | 1989-07-28 | 1989-07-28 | Bearing web for shaft bearings in hand-held power tools |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE8909144U1 (en) |
-
1989
- 1989-07-28 DE DE8909144U patent/DE8909144U1/en not_active Expired
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