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Portable tool with wireless measured value transmission

A portable tool and transmission device technology, applied in the field of portable thread tightening tools, can solve the problems of large structural space and inapplicability of portable appliances, and achieve the effect of reducing energy requirements and omitting high costs

Active Publication Date: 2013-02-27
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a disadvantage of this type of signal transmission structure is that it requires a relatively large installation space and is therefore not particularly suitable for portable appliances

Method used

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  • Portable tool with wireless measured value transmission
  • Portable tool with wireless measured value transmission
  • Portable tool with wireless measured value transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 A schematic diagram of a part of a portable tool 1 according to the invention is shown. Here, the portable tool has a driving device (not shown), such as an electric motor, which drives a driven shaft 4 that is designated by 4 as a whole and rotates around a rotation axis D through a transmission device (not shown). The driven shaft is also used here as a measuring shaft for measuring physical parameters, such as torque in particular. In addition, the tool also has a detection device marked with 2 as a whole, which detects the physical parameters of the working process. Here, the detection device 2 has a strain gauge 28, by means of which a torque, for example a transmitted torque, can be detected. Here, the driven shaft 4 is rotatably supported with respect to the housing part 52 which can be configured as a pot. The reference number 42 designates a driven head on which a screw thread can be arranged, for example.

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PUM

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Abstract

A portable tool(1) includes an electric motor drive(6), an output body, a detection device(2), and a transmission device. The output body can be rotated about a predefined axis. The detection device(2) detects at least one physical measured value which is characteristic of the output operation with the output body(4). The transmission device transmits the physical parameter contactlessly from a rotating region of the tool to a stationary region(54,56) of the tool. The transmission device includes a rotor coil and a stator coil. The rotor coil(12) rotates with respect to the stator coil(14). The stator coil(14) is configured without a former in a region between the stator coil(14) and the rotor coil(12).

Description

Technical field [0001] The invention relates to a portable tool, in particular to a portable screw tightening tool (Schraubwerkzeug). Such portable tools have long been known from the prior art, for example in the form of wrenches, electric screwdrivers or hand drills. Background technique [0002] Such tools are also known in the prior art, which have, for example, a wireless measurement signal transmission device that transmits measured torque data from the rotation area of ​​the tool to the fixed area of ​​the tool. EP 2246 680 A2 describes a power tool with a non-contact torque measuring device and a method for measuring torque in the power tool. Here, a first coil and a second coil arranged on the drive shaft or the motor shaft are provided, and the second coil is coupled to the torque sensor. [0003] Therefore, the device allows a non-contact signal transmission structure, which is used in measurement value sensors for fixed tools. However, the disadvantage of this type o...

Claims

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Application Information

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IPC IPC(8): G01L3/10B25B21/00
CPCG01L3/10G01D5/16G01L3/108G01L5/24B25B23/14B25B21/00
Inventor A·弗卢雷尔M·里格A·库格勒
Owner ROBERT BOSCH GMBH