DE616892C - - Google Patents
Info
- Publication number
- DE616892C DE616892C DENDAT616892D DE616892DA DE616892C DE 616892 C DE616892 C DE 616892C DE NDAT616892 D DENDAT616892 D DE NDAT616892D DE 616892D A DE616892D A DE 616892DA DE 616892 C DE616892 C DE 616892C
- Authority
- DE
- Germany
- Prior art keywords
- motor
- flywheel
- screws
- screw
- electric screwdriver
- 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.)
- Active
Links
- 238000001816 cooling Methods 0.000 description 1
- 230000001627 detrimental Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Description
Robert Bosch Akt.-Ges. in Stuttgart Elektrischer SchraubenzieherRobert Bosch Akt.-Ges. in Stuttgart Electric screwdriver
Patentiert im Deutschen Reiche vom 20. Oktober 1931 abPatented in the German Empire on October 20 , 1931
Bei elektrischen Schraubenziehern hat der Motor beim Eindrehen der Schrauben verhältnismäßig große Kräfte zu überwinden, namentlich in dem Augenblick, in welchem die Schrauben mit ihrem Schraubenkopf auf der Unterlage aufsitzen und vollends stramm angezogen werden müssen. Es ,"wurden bei den seitherigen Ausführungen daher verhältnismäßig große Motoren verwendet, welche das Arbeitsgerät nicht unwesentlich verteuerten. Außerdem wurden die Abmessungen der Geräte so groß, daß an ihnen besondere Handgriffe vorgesehen werden mußten, um die Handhabung zu ermöglichen.In the case of electric screwdrivers, the motor has a proportionate amount of time when screwing in the screws to overcome great forces, especially the moment the screws sit with their screw heads on the surface and are fully tightened Need to become. It, "has therefore become proportionate in what has been said since then used large engines, which made the equipment more expensive. In addition, the dimensions of the devices were so large that they were special Handles had to be provided to enable handling.
Demgegenüber besteht die Erfindung darin, daß ein Motor kleiner Leistung und kleinen Durchmessers im Handgriff des Geräts untergebracht und zur Überwindung der beim Festziehen der Schrauben eintretenden hohen, zusätzlichen Belastungen mit einer Schwungscheibe versehen ist.In contrast, the invention is that a motor of small power and small Diameter housed in the handle of the device and to overcome when tightening the screws occurring high, additional loads with a flywheel is provided.
In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes teils in Ansicht, teils im Schnitt dargestellt.In the drawing, an exemplary embodiment of the subject matter of the invention is partly in view, partly shown in section.
In einem Gehäuse α ist, wie gestrichelt angedeutet, ein Motor b angeordnet, auf dessen Achse c eine Schwungscheibe d befestigt ist. Diese ist gleichzeitig als Ventilatorscheibe zum Kühlen des Motors ausgebildet und weist zu diesem Zweck schräg nach außen gerichtete Bohrungen e auf.In a housing α , as indicated by dashed lines, a motor b is arranged, on the axis c of which a flywheel d is attached. This is designed at the same time as a fan disk for cooling the motor and for this purpose has bores e directed obliquely outward.
Wie aus der Zeichnung ersichtlich ist, sind die Abmessungen des Motors b und damit des ganzen Gehäuses α so klein gehalten, daß das Gerät keines besonderen Handgriffes bedarf und infolge seines geringen Gewichts bequem gehandhabt werden kann. Die zusätzlichen Kräfte, die auftreten, wenn die einzudrehenden Schrauben mit ihrem Schraubenkopf auf der Unterlage aufsitzen und vollends stramm angezogen werden müssen, werden von der Schwungscheibe d überwunden, so daß die vorhandene kleine Leistung des Motors zum Festziehen der Schrauben genügt. Die Ventilatorscheibe kühlt den Motor so wirksam, daß dieser auch bei dauerndem Arbeiten sich nicht schädlich erwärmen kann.As can be seen from the drawing, the dimensions of the motor b and thus of the entire housing α are kept so small that the device does not require any special handling and can be easily handled due to its low weight. The additional forces that occur when the screw to be screwed sit with their screw head on the base and must be fully tightened, are overcome by the flywheel d , so that the existing small power of the motor is sufficient to tighten the screws. The fan disc cools the motor so effectively that it cannot heat up to a detrimental effect even when it is continuously working.
Außerdem unterstützt die Schwungscheibe, wenn die Schraube festgezogen ist, das Auskuppeln der zu diesem Zweck gebräuchlichen Rutschkupplung, die in bekannter Weise zwischen dem Motor und dem Schraubenzieher untergebracht ist.In addition, the flywheel helps disengage when the screw is tightened the slip clutch commonly used for this purpose, which in a known manner between the motor and the screwdriver.
Claims (2)
Publications (1)
Publication Number | Publication Date |
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DE616892C true DE616892C (en) |
Family
ID=576206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT616892D Active DE616892C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE616892C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1078958B (en) * | 1958-04-24 | 1960-03-31 | Hanns Fickert | Electric screwdriver |
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0
- DE DENDAT616892D patent/DE616892C/de active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1078958B (en) * | 1958-04-24 | 1960-03-31 | Hanns Fickert | Electric screwdriver |
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