• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a method for personal protection using a hand-held tool (100), which is driven by a rotating shaft (30), wherein a rotational acceleration of the rotating shaft (30) of the hand-held tool is detected and a safety measure is performed if the determined rotational acceleration is achieved. a threshold value. The invention also relates to a hand-held tool and computer unit.
    公开号:SE539964C2
    申请号:SE1450948
    申请日:2014-08-15
    公开日:2018-02-13
    发明作者:Rieger Manuel
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    Method The present invention relates to a method of personal protection when using a hand-held tool and a hand-held tool.
    State of the art Hand-held tools, which have electric motors driven by rotating shafts, can be, for example, screw tools such as (battery-powered) screwdrivers or even drilling tools such as single-hammer drills. Optionally, the direction of rotation of the rotating shaft can be set by the user. Depending on the nominal power, such devices can generate very strong forces and torques, which in the event of incorrect handling or unforeseen (even incorrect) operating conditions can also cause wounds and injuries to the user. This situation occurs especially when the workpiece does not raise the expected counter-torque, for example if the shaft does not rotate in the planned direction of rotation, which, for example, is set by the user, or if the connection between tool and workpiece is lost, which can lead to danger to user safety and serious injury. the hos user. This may be the case, for example, if an error occurs in the hand-held tool and the direction of rotation performed does not correspond to the set one, the re-user accidentally sets the wrong direction of rotation or if a defect in a workpiece machined with the hand-held tool is present or occurs. For example, a screw head, which is to be screwed on with the hand-held tool, can come off or wear out.
    It is therefore desirable to provide an opportunity to increase personal protection when using a hand-held tool and reduce the risk of injury.
    Description of the invention In accordance with the invention, a method of personal protection is proposed when using a hand-held tool and a hand-held tool with the criteria in the independent patent claims. Advantageous designs are subject to the dependent claims as well as the following description.
    Advantages of the invention The invention provides a particularly simple and safe possibility of reducing or completely avoiding injuries to the user of a hand-held tool with a rotating shaft, wherein the rotational accelerations occurring on the shaft are monitored and limited by one or more safety measures.
    If a user wants to put a hand-held tool into operation and adjusts to a rotating shaft of the hand-held tool rotating in a certain direction of rotation, the user in most cases exerts a force against this direction of rotation in order to be able to control that hand-held tool. However, if the rotating shaft of the hand-held tool rotates in the opposite direction of rotation, on which the user has not adjusted, the user may lose control of the hand-held tool and may also be injured. In this case and in the event of a connection loss, the rotational acceleration of the rotating shaft of the hand-held tool increases rapidly. This circumstance utilizes the invention, to increase the operational reliability and personal protection of the hand-held tool.
    By registering according to the invention the rotational acceleration of the rotating shaft of the hand-held tool and the monitoring of whether the rotational acceleration has reached the upper threshold value, it is checked, so to speak, whether a sufficient counter-torque is provided from the workpiece. If this is not the case, the rotational acceleration reaches the threshold value and a safety measure is carried out, in order to guarantee the user's safety. As the hand-held tool can perform high torques, the hand-held tool can exert high forces on the user. The invention prevents uncontrolled operation of the hand-held tool and prevents the user from being injured by these high forces.
    Thus, the personal protection of the user is guaranteed by the invention, in particular when the direction of rotation of the rotating shaft of the rotating hand-held tool does not correspond to a desired direction of rotation. This may be the case, for example, if the user erroneously sets the incorrect direction of rotation. The invention avoids these risks and increases the user's safety.
    Furthermore, by means of the invention, the user's personal protection can be increased, in particular in the event of a defect in the hand-held tool or workpiece, which is machined with the hand-held tool. Such a defect of the hand-held tool can in particular lead to the hand-held tool rotating in the wrong direction of rotation due to a defect. This may be the case, for example, if the control unit of the hand-held tool has a defective and the hand-held tool is no longer controlled correctly or, for example, a screw head, which is to be screwed on by means of the hand-held tool, falls off, etc. This is the user's safety in the danger zone, as he is not prepared for the rapidly increasing speed of the rotating shaft. Thus, by monitoring whether the rotational acceleration of the rotating shaft reaches the threshold value, it is also checked whether such a defect of the hand-held tool or workpiece is present.
    Furthermore, the invention detects if during the operation of the hand-held tool the direction of rotation of the rotating shaft of the hand-held tool is changed by mistake. This may be the case, for example, if the user accidentally activates a corresponding switch for setting the direction of rotation. By detecting the rotational acceleration and a suitable choice of the threshold value, it is detected if there is a change in the direction of rotation of the rotating shaft of the hand-held tool. In this case, the corresponding safety measure is also implemented.
    In many hand-held tools, the speed, translation ratio or power of the hand-held tool may also be set. Even with such settings, the user's safety can be jeopardized if the handheld tool is set incorrectly. Here too, the user's personal protection is enhanced by the invention.
    The invention can be integrated into a handheld tool cost-effectively and without great expense. The invention can then be realized in a simple manner through a software. This software can be easily integrated into a computer unit, at least in the handheld tool. The invention does not require any mechanics and no wear-sensitive construction parts. In particular, an acceleration sensor is used for the detection of the rotational acceleration. Such acceleration sensors are cost-effective to acquire and do not require much space. Such an acceleration sensor can thus be integrated without problems even in the limited space conditions of a hand-held tool.
    As a safety precaution, the hand-held tool is preferably disengaged. In particular, this can be done instantaneously, whereby as soon as the threshold value has been reached, the power supply of the hand-held tool is interrupted. On the other hand, the power supply of the hand-held tool can also be reduced continuously, until the hand-held tool is finally disconnected. Alternatively or in addition, a warning signal is preferably issued, for example in the form of an acoustic warning sound or a warning lamp, as a safety measure. A vibration of the hand-held tool is also a possible warning signal. Alternatively, the speed of the rotating shaft of the hand-held tool is preferably limited as a safety measure. This speed limit is in particular a speed value at which there is no danger to the user of the hand-held tool.
    In an advantageous embodiment of the invention, a direction of rotation of the rotating shaft is determined on the basis of the detected rotational acceleration. In several hand-held tools, a desired direction of rotation of the rotating shaft can be set by the user, for example by means of a switch, in particular by means of a toggle switch. Preferably, it is checked whether the determined direction of rotation corresponds to the desired direction of rotation. This increases the user's safety, in case the user has accidentally or the handheld tool set the wrong direction of rotation due to an error. For example, in hand-held tools, in which the direction of rotation is set via a user interface, in particular in the form of a software, the incorrect direction of rotation can be set by software error. By the invention this can be detected and the corresponding safety measures can be initiated in good time.
    A computer unit in accordance with the invention, for example a control device for a hand-held tool, is, in particular program-technically, configured to carry out a method according to the invention. The implementation of the invention in the form of software is also advantageous, as it enables particularly low costs, especially if an embodiment computer unit uses more detailed data and therefore in any case exists. Suitable data carriers for the provision of computer programs are in particular floppy disks, hard disks, flash memory, EEPROMs, CD-ROMs, DVDs and more. It is also possible to download a program via computer network (internet, intranet, etc.).
    Further advantages and embodiments of the invention appear from the description and the accompanying drawing.
    It is clear that the above-mentioned and the criteria intended for further elucidation below are not only useful in the foregoing stated combination, but also in other combinations or independently, without departing from the scope of the present invention.
    The invention is schematically illustrated by means of exemplary embodiments in the drawing and the following will be described in detail with reference to the drawing.
    Description of the figures Figure 1 schematically shows a preferred embodiment of a hand-held tool according to the invention, which is configured to carry out a preferred embodiment of a method according to the invention.
    Detailed description of the drawing In figure 1, a hand-held tool in the form of a battery-powered screwdriver is schematically shown and denoted by 100.
    The battery-powered screwdriver 100 then has an energy supply source, in particular in the form of a battery 10. In the case of the battery 10, an electric machine, in particular an electric motor 20, can be supplied with energy. The electric motor 20 can set a shaft 30 of the battery-powered screwdriver 100 in rotation. At the end of the shaft 30, different bodies 40 can be mounted to fasten different types of screws with the battery-powered screwdriver 100.
    The battery-powered screwdriver 100 further has a toggle switch 50. In the noble toggle switch 50, a direction of rotation 31 of the shaft 30 can be set. In a switch 60, the battery-powered screwdriver 100 can be switched on and off.
    The battery-powered screwdriver 100 further has a computer unit, in particular in the form of a control device 70. The control device 70 is configured to carry out a preferred embodiment of the method according to the invention. If a user sets by means of the rocker switch 50 a direction of rotation of the shaft 30, this is registered by the control device 70, indicated by reference numeral 75. In the following shell, the explicit example is considered, where the user sets a direction of rotation 31 of the shaft 30 which is clockwise. The controller 70 sets the corresponding direction of rotation 31 clockwise.
    If the user now activates the switch 60, this is also registered by the control device 70, indicated by reference numeral 76. The control device then controls the electric motor 20, indicated by reference numeral 72. The electric motor 20 is supplied through the battery 10 with energy and the displacement shaft 30 in rotation with the clockwise rotation 31. The rotating shaft 30 also sets the body 40 in rotation.
    An acceleration sensor 80 now detects a rotational acceleration of the rotating shaft 30. The acceleration sensor 80 transmits the detected rotational acceleration to the controller 70, indicated by reference numeral 78. The controller 70 monitors whether the detected rotational acceleration reaches a threshold value. In particular, the monitor controller 70 then if the detected rotational acceleration exceeds a threshold value.
    In this case, there is a risk that the user may lose control of the battery-powered screwdriver 100, which could potentially result in injury to the user. The control device 70 therefore performs a corresponding safety measure.
    Preferably, the controller 70 disconnects the battery-powered screwdriver as a safety precaution. In addition, the controller 70 can separate the electric motor 20 from the battery, indicated by reference numeral 71.
    Alternatively or additionally, the actuator 70 determines from the detector rotational acceleration of the acceleration sensor 80 the direction of rotation 31 of the rotating shaft 30. The actuator 70 checks whether this determined direction of rotation 31 corresponds to the direction of rotation set at the rocker switch 50. If this is not the case, then there is, for example, a defect in the battery-powered screwdriver 100. This particular example is then the determined direction of rotation 31 of the rotating shaft 30 counterclockwise, even though the rotation direction 31 of the rotating shaft 30 was set clockwise at the rocker switch. In this case, the control device 70 also carries out the safety measure and disconnects the battery-powered screwdriver 100.
    权利要求:
    Claims (9)
    [1]
    A method of personal protection using a hand-held tool (100), which is driven by a rotating shaft (30), wherein a rotational acceleration of the rotating shaft (30) of the hand-held tool is detected, monitoring is performed of whether the detected rotational acceleration has been achieved. upper threshold value, - due to the result of the detected rotational acceleration and monitoring, it is checked whether an expected torque is provided from the workpiece, and -a safety measure is performed if the determined rotational acceleration has reached the upper threshold without the expected counter torque being provided from the workpiece.
    [2]
    A method according to claim 1, wherein the hand-held tool (100) is disengaged as a safety measure.
    [3]
    Method according to Claim 1 or 2, in which a warning signal is issued as a safety measure.
    [4]
    A method according to any one of the preceding claims, wherein as a safety measure a speed of the rotating shaft (30) of the hand-held tool (100) is limited.
    [5]
    A method according to any one of the preceding claims, wherein a direction of rotation (31) of the rotating shaft (30) of the hand-held tool (100) is determined on the basis of the detected rotational acceleration.
    [6]
    A method according to claim 5, wherein the safety measure is performed if the fixing direction of rotation (31) of the rotating shaft (30) of the hand-held tool (100) does not correspond to a direction of rotation set by a toggle switch (50) of the hand-held tool ( 100).
    [7]
    Computer unit (70), which is configured - to monitor whether a detected rotational acceleration of a rotating shaft (30) of a hand-held tool reaches an upper threshold value, -that due to the result of the detected rotational acceleration and monitoring whether an expected counter-torque is provided from the workpiece, and controlling the hand-held tool to perform a safety action if the determined rotational acceleration reaches the upper threshold value, without the expected counter-torque being provided from the workpiece.
    [8]
    A hand-held tool (100), comprising - a rotating shaft (30) - an acceleration sensor (80), which is configured to detect single-rotational acceleration of the rotating shaft (30) of the hand-held tool (100) and - a computer unit (70) according to requirement 7.
    [9]
    A hand-held tool (100) according to claim 8, which is designed as a screw tool or a drilling tool.
    类似技术:
    公开号 | 公开日 | 专利标题
    USRE45112E1|2014-09-09|Power tool anti-kickback system with rotational rate sensor
    US7410006B2|2008-08-12|Power tool anti-kickback system with rotational rate sensor
    CN101051744B|2013-03-27|Electric machine tool and method for operating thereof
    US9962807B2|2018-05-08|Angle grinder comprising a yaw rate sensor for measuring the housing rotation
    CN105459033A|2016-04-06|Sensor Device, in Particular Hand-Held Power-Tool Sensor Device
    CN201159251Y|2008-12-03|Controller of power tool with slewing axis
    US20200114502A1|2020-04-16|Power tool with anti-kickback control system
    US10675747B2|2020-06-09|Control method for a hand-held power tool
    SE539964C2|2018-02-13|Procedure for personal protection when using a handheld tool as well as a handheld tool and computer unit
    US9050726B2|2015-06-09|Activation control device for robotic auxiliary devices
    CN103406571A|2013-11-27|Drilling machine with protective device
    US9366299B2|2016-06-14|Handheld drill/driver device
    JP2019519388A|2019-07-11|Electric pulse tool with controlled reaction force
    JP6558737B2|2019-08-14|Impact rotary tool
    US20210059649A1|2021-03-04|Replaceable battery unit for a surgical power tool
    US20200206887A1|2020-07-02|Power tool and method
    JP2015104760A|2015-06-08|Processing device and method for determining state of main spindle thereof
    JP2009083044A|2009-04-23|Impact tightening tool
    JP2010194663A|2010-09-09|Power tool
    同族专利:
    公开号 | 公开日
    DE102013216428A1|2015-02-26|
    SE1450948A1|2015-02-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4041043A1|1990-12-20|1992-06-25|Mania Electronic Gmbh|Tool breakage control for circuit board machining - evaluates tool spindle speed upon displacement of tool w.r.t. workpiece|
    DE10103142A1|2001-01-24|2002-07-25|Hilti Ag|Electric tool rotating apparatus and safety starting routine has microcontroller to disconnect motor drive to tool if threshold exceeded|
    DE102008043785A1|2008-11-17|2010-05-20|Robert Bosch Gmbh|Handheld machine tool i.e. drill press, device, has sensor unit detecting characteristic of torque, and another sensor unit provided for detecting characteristic of number of revolutions, where sensors are partly single piece formed|
    DE102009045758A1|2009-10-16|2011-04-21|Robert Bosch Gmbh|Hand tool e.g. drilling machine, has processing unit connected with acceleration sensor and electric motor and drive shaft and controlling rotational movement of motor and drive shaft based on acceleration signal|
    DE102009054762A1|2009-12-16|2011-06-22|Hilti Aktiengesellschaft|Control method for a hand-held machine tool and machine tool|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102013216428.9A|DE102013216428A1|2013-08-20|2013-08-20|Method of personal protection when operating a hand-held tool|
    [返回顶部]