Drilling device and friction clutch for a drilling device

Patent metadata

Field	Value
Publication number	US-10245717-B2
Application number	US-201514672778-A
Country	US
Kind code	B2
Filing date	Mar 30, 2015
Priority date	Mar 28, 2014
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A drilling device, which is adjustable at least between a clamping configuration, a drilling configuration and a screwing configuration, includes a machine housing and a machine spindle, which is drivable with the aid of a motor. A drill chuck having a jaw holder, in which clamping jaws are guided, which are adjustable with the aid of a threaded connection provided between an entrainer and a threaded sleeve is provided. A drill spindle, which is drivable by the motor via a planetary gear set, is disposed on the side facing the machine spindle and includes a sun wheel, a planet carrier, which carries at least one planet wheel, and a ring wheel, which has at least one cam, which interacts with at least one clutch element, which is fixed with respect to the ring gear in the drilling configuration. The at least one clutch element is supported with respect to the ring wheel, movable against a clamping spring force of a clamping spring, and the at least one clutch element is movably supported against a screw spring force, in the screwing configuration, the screw spring force resulting from a series connection of the clamping spring and a screw spring.

First claim

What is claimed is:

1. A drilling device that is adjustable at least between a clamping configuration, a drilling configuration and a screwing configuration, the drilling device comprising:
a machine housing;
a machine spindle, which is drivable with the aid of a motor;
a drill chuck having a jaw holder, in which clamping jaws are guided that are adjustable with the aid of a threaded connection provided between an entrainer and a threaded sleeve;
a drill spindle that is drivable by the motor via a planetary gear set, which is disposed on a side facing the machine spindle and includes a sun wheel;
a planet carrier that carries at least one planet wheel; and
a ring wheel that has at least one cam that interacts with at least one clutch element fixed with respect to the ring wheel in the drilling configuration,
wherein the at least one clutch element is supported movably against a clamping spring force of a clamping spring with respect to the ring wheel in the clamping configuration,
wherein the at least one clutch element is movably supported against a screw spring force with respect to the ring wheel in the screwing configuration,
wherein the screw spring force results from a series connection of the clamping spring and a screw spring, with the clamping spring and the screw spring being positioned in series along a central axis of the drilling device, and
wherein the screw spring is spaced apart from the clamping spring in the axial direction of the central axis.

2. The drilling device according to claim 1 , wherein a shift sleeve is provided for manual switching between the configurations.

3. A drilling device that is adjustable at least between a clamping configuration, a drilling configuration and a screwing configuration, the drilling device comprising:
a machine housing;
a machine spindle, which is drivable with the aid of a motor;
a drill chuck having a jaw holder, in which clamping jaws are guided that are adjustable with the aid of a threaded connection provided between an entrainer and a threaded sleeve;
a drill spindle that is drivable by the motor via a planetary gear set, which is disposed on a side facing the machine spindle and includes a sun wheel;
a planet carrier that carries at least one planet wheel; and
a ring wheel that has at least one cam that interacts with at least one clutch element fixed with respect to the ring wheel in the drilling configuration,
wherein the at least one clutch element is supported movably against a clamping spring force of a clamping spring with respect to the ring wheel in the clamping configuration,
wherein the at least one clutch element is movably supported against a screw spring force with respect to the ring wheel in the screwing configuration,
wherein the screw spring force results from a series connection of the clamping spring and a screw spring, and
wherein the screw spring and the clamping spring are separated by a separating disk, which is fixedly disposed with respect to the ring wheel in the clamping configuration and is adjustably disposed with respect to the ring wheel in the screwing configuration.

4. The drilling device according to claim 3 , wherein the clamping spring is disposed on the side of the separating disk facing the ring wheel, and wherein the screw spring is disposed on the side of the separating disk facing away from the ring wheel.

5. The drilling device according to claim 3 , wherein an anti-rotation system is active between the machine housing and the separating disk for rotatably fixedly supporting the separating disk with respect to the machine housing.

6. The drilling device according to claim 3 , wherein the separating disk has a guiding element, which blocks a movement with respect to the ring wheel or an axial movement of the separating disk in the clamping configuration.

7. The drilling device according to claim 6 , wherein the anti-rotation system is formed from the guiding element and a guiding groove provided axially in the machine housing.

8. The drilling device according to claim 6 , wherein the shift sleeve includes a radial guide for guiding the guiding element in the clamping configuration and in the drilling configuration, and wherein the shift sleeve has an axial guide for guiding the guiding element in the screwing configuration.

9. The drilling device according to claim 1 , wherein the at least one clutch element has a multi-part design and includes at least one ring wheel clutch part and at least one spring clutch part.

10. The drilling device according to claim 9 , wherein the at least one ring wheel clutch part is guided in the machine housing or a clutch ring, which is rotatably fixedly coupled with the machine housing, and wherein an orifice ring, which is rotatably fixedly connected to the shift sleeve or forms a single piece therewith, is disposed coaxially to the machine housing and has at least one opening in which the at least one spring clutch part is disposed.

11. The drilling device according to claim 9 , wherein a diameter of the at least one ring wheel clutch part is smaller than or equal to a diameter of the spring clutch part.

12. The drilling device according to claim 9 , wherein the at least one spring clutch part and the at least one ring wheel clutch part corresponding thereto are disposed in alignment with a shared spring axis in the screwing configuration and in the clamping configuration.

13. The drilling device according to claim 1 , wherein an axially adjustable compression element is provided for varying the screw spring force.

14. The drilling device according to claim 1 , wherein the jaw holder is rotatably fixedly supported with respect to the machine housing in the clamping configuration and is rotatably fixedly supported with respect to the drill spindle in the drilling configuration.

15. The drilling device according to claim 1 , wherein the shift sleeve includes a dial having a shifting gate in which a control element is guided, which is adjustable between the configurations.

16. The drilling device according to claim 15 , wherein the control element is coupled with a sliding sleeve that interacts with the jaw holder such that it rotatably fixedly supports the jaw holder with respect to the machine housing exclusively in the clamping configuration.

17. The drilling device according to claim 16 , wherein the control element is rotatably fixedly disposed with respect to the machine housing.

18. The drilling device according to claim 15 , wherein the shifting gate is designed as an annular recess in an inner wall of the dial in which the control element, which is designed as a control clip, is guided.

19. The drilling device according to claim 1 , wherein the at least one cam is a front cam provided on a front side of the ring wheel facing away from the machine spindle.

20. A friction clutch for limiting a torque in a drilling device, the friction clutch comprising:
a ring wheel having a clutch side, which includes cams; and
at least one clutch element resting against the clutch side, which is fixed in its position with respect to the ring wheel in a drilling configuration and which is movably supported with respect to a the ring wheel against a clamping spring force of a clamping spring in a clamping configuration, and which is movably supported with respect to the ring wheel against a screw spring force in a screwing configuration,
wherein the screw spring force results from a series connection between the clamping spring and a screw spring.

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Assignees

• Roehm Gmbh

Inventors

• Schenk Peter
• Hengsberger Patrick

Classifications

• B25F5/001 Primary

  Gearings, speed selectors, clutches or the like specially adapted for rotary tools · CPC title

• Y10T74/20012

  Multiple controlled elements · CPC title

• F16D7/046

  with a plurality of axially moving parts · CPC title

• F16D7/08

  moving axially between engagement and disengagement · CPC title

• G05G9/00

  Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously · CPC title