Transportable screwing tool with integrated switching element

Patent metadata

Field	Value
Publication number	US-9272397-B2
Application number	US-201213563852-A
Country	US
Kind code	B2
Filing date	Aug 1, 2012
Priority date	Aug 2, 2011
Publication date	Mar 1, 2016
Grant date	Mar 1, 2016

Abstract

A transportable screwing tool configured to mount and/or dismount screws into and/or out of a work piece includes an electric motor operable by electrical energy and a switching element configured to activate and/or deactivate the electric motor. The screwing tool further includes a drive train arranged inside a housing of the screwing tool. The drive train is mounted pivotably about an axis of rotation arranged essentially perpendicularly to the drive train. A method for activating and/or deactivating the electric motor includes moving at least one element of the switching element for the purpose of activating the electric motor out of a position of nonuse into a position of use when the drive train is moved in rotation about the axis of rotation.

First claim

What is claimed is:

1. A transportable screwing tool for mounting and/or demounting screws into and/or out of a work piece, comprising:
a housing defining a first longitudinal axis;
an electric motor;
a switching element having a first position and a second position and configured for one or more of activating and deactivating the electric motor when moved between the first position and the second position; and
a drive train supported by the housing and pivotable about an axis of rotation with respect to the housing, the drive train operably connected to the electric motor and including a screwing spindle defining a second longitudinal axis, wherein:
the axis of rotation is perpendicular to a plane defined by the first longitudinal axis and second longitudinal axis; and
the drive train is operably connected to the switching element such that as the drive train pivots about the axis of rotation in a first direction, the switching element is moved from the first position to the second position.

2. The screwing tool according to claim 1 , wherein the drive train includes a gear connected rigidly to the electric motor.

3. The screwing tool according to claim 2 , wherein the drive train has a measuring element arranged rigidly on the gear.

4. The screwing tool according to claim 2 , wherein the drive train has a rotary encoder.

5. The screwing tool according to claim 1 , further comprising:
control electronics arranged rigidly with respect to the housing; and
a connection element arranged between the switching element and the control electronics.

6. The screwing tool according to claim 1 , wherein the switching element is fixed to the drive train such that the switching element moves with the drive train with respect to the housing as the drive train pivots about the axis of rotation.

7. The screwing tool according to claim 1 , further comprising a spring element arranged on the drive train to urge the drive train in a second direction opposite to the first direction into a position of rest when the screwing tool is not in use.

8. The screwing tool according to claim 1 , further comprising an angled head screwing element that is rigidly connected to the drive train such that deflection of the angled head screwing element pivots the drive train about the axis of rotation in the first direction out of a position of rest and toward an activation position.

9. The screwing tool according to claim 1 , wherein the screwing tool has at least one energy accumulator unit configured to store electrical energy.

10. A method for activating and/or deactivating an electric motor by use of a switching element which is arranged inside a housing of a screwing tool configured to mount and/or dismount screws into and/or out of a work piece, comprising:
applying a pressure force on an angled head screwing element of the screwing tool, wherein:
the housing defines a first longitudinal axis;
the angled head screwing element defines a second longitudinal axis, and is rigidly connected to a drive train of the screwing tool;
the drive train is supported by the housing, is pivotable with respect to the housing about an axis of rotation perpendicular to a plane defined by the first longitudinal axis and second longitudinal axis, and is operatively connected to the electric motor and the switching element;

pivoting the drive train in a first direction about the axis of rotation via the pressure force acting on the angled head screwing element to move the switching element from a first position to a second position, the switching element configured to activate the electric motor when moved from the first position to the second position; and
activating the electric motor of the switching tool by moving the switching element from the first position to the second position in order to operate the angled head screwing element.

11. The method according to claim 10 , wherein:
the screwing tool further includes a spring element that is arranged in the housing and that is configured to exert a spring force on the drive train in a second direction opposite to the first direction and toward a position of rest; and
the drive train is moved out of the position of rest into an activation position to move the switching element from the first position to the second position when the pressure force applied to the angled head screwing element is sufficient to overcome the spring force of the spring element.

Assignees

• Goetz Kurt
• Kugler Achim
• Bosch Gmbh Robert

Inventors

• Goetz Kurt
• Kugler Achim

Classifications

• B25B23/1422

  torque indicators or adjustable torque limiters · CPC title

• B25F5/00

  Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for · CPC title

• B25B23/1425

  by electrical means · CPC title

• B25B21/00 Primary

  Portable power-driven screw or nut setting or loosening tools; (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; {for mounting or dismounting wheels B60B29/006}); Attachments for drilling apparatus serving the same purpose (machines B23P19/06) · CPC title

• B25B23/14

  Arrangement of torque limiters or torque indicators in wrenches or screwdrivers (couplings for transmitting rotation or clutches F16D; devices for measuring torque per se G01L) · CPC title