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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 unsuitable portable appliances and large structural space, and achieve the effect of omitting high cost and reducing energy demand

Active Publication Date: 2016-09-28
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 view of a part of a portable tool 1 according to the invention is shown. In this case, the portable tool has a drive (not shown), such as an electric motor, which drives an output shaft 4 , designated as a whole by 4 , which rotates about an axis of rotation D via a gear (not shown). In this case, the driven shaft also serves as a measuring shaft for measuring physical variables, such as in particular torque. In addition, the tool has a detection device designated as a whole by 2, which detects a physical parameter of the working process. In this case, the detection device 2 has a strain gauge 28 , by means of which a torque, for example a transmitted torque, can be detected. In this case, output shaft 4 is mounted rotatably relative to housing part 52 , which may be embodied in the shape of a pot. The reference numeral 42 designates the output head, on which, for example, a screwdriver can be arranged.

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PUM

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Abstract

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

Description

technical field [0001] The invention relates to a portable tool, in particular a portable screwdriver. 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] Tools are likewise known in the prior art, which have, for example, a wireless measurement signal transmission device for transmitting measured torque data from a rotating region of the tool to a stationary region of the tool. EP 2246 680 A2 describes an electric tool with a contactless torque measuring device and a method for measuring torque in an electric tool. In this case, a first coil and a second coil arranged on the drive shaft or the motor shaft, which is coupled to the torque sensor, are provided. [0003] The device thus permits a contactless signal transmission structure, which is used in measured value sensors for stationary tools. However, a signal transmission structure of this type has the di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L3/10B25B21/00
CPCB25B23/14G01L3/108G01L5/24
Inventor A·弗卢雷尔M·里格A·库格勒
Owner ROBERT BOSCH GMBH