公开(公告)号：EP0437060A3

公开(公告)日：1991-11-21

申请号：EP90313695.0

申请日：1990-12-14

申请人： Black & Decker Inc.

发明人： Elligson, Daniel M.

IPC分类号： B25F5/00 ,  B25B23/14 ,  B25B21/00

CPC分类号： B25F5/001 ,  B25B21/00 ,  B25B23/141

摘要： In an electrically powered combination screwdriver/drill (10), opposing halves (60, 62) of a ratchet type torque transmitting clutch (58) are normally biased axially apart by a compression spring (70). The output half (62) of the clutch is fixed on the output spindle (56) of the tool which is free to move axially within limits. For screwdriving operation, operator bias of the tool against the workpiece overcomes the spring, retracting the output spindle and bringing the clutch halves into engagement. An adjustable stop (78) in the nose of the tool limits axially rearward movement of the output spindle and hence depth of engagement of the clutch teeth (60, 62), thus providing a variable limit on torque transmitted. For the drilling mode, the rearward half of the clutch is cammed forward so that the clutch is firmly engaged for continuous rotation of the output spindle without specific torque limitation. An operator may switch from drilling mode to screwdriving mode and back without disturbing the torque limit adjustment of the screwdriving mode.

公开(公告)号：EP0680808B1

公开(公告)日：2001-08-29

申请号：EP95302725.7

申请日：1995-04-24

申请人： Black & Decker Inc.

发明人： Defrancesco, Anjelo J., Jnr. ,  Kunz, Michael P. ,  Elligson, Daniel M.

IPC分类号： B25F5/00 ,  H02P7/29 ,  B25B23/147

CPC分类号： H02P7/29 ,  B25B23/1475

公开(公告)号：EP0680808A1

公开(公告)日：1995-11-08

申请号：EP95302725.7

申请日：1995-04-24

申请人： Black & Decker Inc.

发明人： Defrancesco, Anjelo J., Jnr. ,  Kunz, Michael P. ,  Elligson, Daniel M.

IPC分类号： B25F5/00 ,  H02P7/29 ,  B25B23/147

CPC分类号： H02P7/29 ,  B25B23/1475

摘要： An impact tool 10 having a speed limiting control circuit 22 to allow an operator of the tool to controllably limit the maximum speed of the tool to a predetermined value when a trigger 16 thereof is fully engaged. The impact tool includes a manually adjustable speed limiting control 20 protruding from an outer surface of the impact tool which is conveniently manually adjustable. The speed limiting control 20 is coupled to the wiper arm 24a of a speed limiting potentiometer 24 which is electrically coupled to a speed control circuit 22 within the impact tool. The speed limiting potentiometer 24 limits the maximum speed of the motor 26 of the impact tool (and thus the maximum torque which can be generated by the impact tool 10) to an operator selected percentage of the maximum motor speed which would otherwise be produced when the trigger is fully engaged. In the preferred embodiment the speed limiting potentiometer 24 is electrically coupled in series between a capacitor 40 and speed control potentiometer 36, which are each coupled to a 555 CMOS timer 34 which controls the duty cycle of a FET 50 used to drive the motor. The speed limiting potentiometer 24 enables the operator to further limit the maximum duty cycle of the output of the timer 340 which is a pulse-width-modulated like output, to a percentage of that which would otherwise be produced when the trigger is fully engaged.

摘要翻译： 具有速度限制控制电路22的冲击工具10，其允许工具的操作者在其触发器16完全接合时可控地将工具的最大速度限制在预定值。 冲击工具包括从冲击工具的外表面突出的可手动调节的限速控制装置20，其可方便地手动调节。 速度限制控制器20耦合到速度限制电位计24的擦拭器臂24a，该限速电位计24电耦合到冲击工具内的速度控制电路22。 速度限制电位器24将冲击工具的电动机26的最大速度（并且因此可以由冲击工具10产生的最大扭矩）限制在操作者所选择的最大电动机速度的百分比，否则当最大电动机速度 触发器完全啮合。 在优选实施例中，速度限制电位器24串联电耦合在电容器40和速度控制电位计36之间，每个电位器都耦合到控制用于驱动电动机的FET 50的占空比的555 CMOS定时器34。 速度限制电位器24使得操作者能够将作为脉冲宽度调制的类似输出的定时器340的输出的最大占空比进一步限制为当触发器完全接合时将产生的百分比。

公开(公告)号：EP0437060A2

公开(公告)日：1991-07-17

申请号：EP90313695.0

申请日：1990-12-14

申请人： Black & Decker Inc.

发明人： Elligson, Daniel M.

IPC分类号： B25F5/00 ,  B25B23/14 ,  B25B21/00

CPC分类号： B25F5/001 ,  B25B21/00 ,  B25B23/141

摘要： In an electrically powered combination screwdriver/drill (10), opposing halves (60, 62) of a ratchet type torque transmitting clutch (58) are normally biased axially apart by a compression spring (70). The output half (62) of the clutch is fixed on the output spindle (56) of the tool which is free to move axially within limits. For screwdriving operation, operator bias of the tool against the workpiece overcomes the spring, retracting the output spindle and bringing the clutch halves into engagement. An adjustable stop (78) in the nose of the tool limits axially rearward movement of the output spindle and hence depth of engagement of the clutch teeth (60, 62), thus providing a variable limit on torque transmitted. For the drilling mode, the rearward half of the clutch is cammed forward so that the clutch is firmly engaged for continuous rotation of the output spindle without specific torque limitation. An operator may switch from drilling mode to screwdriving mode and back without disturbing the torque limit adjustment of the screwdriving mode.

摘要翻译： 在电动组合螺丝刀/钻头（10）中，棘轮式扭矩传递离合器（58）的相对的半部（60,62）通常被压缩弹簧（70）轴向地分开。 离合器的输出半部（62）固定在工具的输出轴（56）上，其在限制范围内自由地轴向移动。 对于螺丝起子操作，刀具对工件的操作者偏压克服了弹簧，缩回输出主轴并使离合器半部接合。 刀具鼻部中的可调节止动件（78）限制输出主轴的轴向向后移动，并因此限制离合器齿（60,62）的接合深度，从而为传递的扭矩提供可变限制。 对于钻孔模式，离合器的后半部向前凸轮，使得离合器牢固地接合以便输出主轴的连续旋转而没有特定的扭矩限制。 操作员可以从钻孔模式切换到螺丝起子模式，而不会影响螺丝起子模式的扭矩极限调整。