DE102015006318A1 - power tool - Google Patents

Abstract

It is an object of the present invention to provide a technique that contributes to a further improvement of a hand-held power tool. The representative hand-held power tool performs a predetermined operation using a tool bit. The power tool includes a tool body, a drive mechanism adapted to drive the tool bit, and an output changing device. The output changing device is adapted to change the output of the tool bit according to a tilt state of the tool body with respect to a standard line, the standard line being provided based on a gravity acting on the tool body.

Description

TECHNICAL AREA

The invention relates to a hand-held power tool that holds a user with his hand.

STATE OF THE ART

The Japanese Unexamined Patent Laid-Open Publication No. 2012-11543 discloses a position sensing technique for a nail operator. This technique is provided with an acceleration sensor that detects the position change of the nail driver held by a user in a work environment. According to the prior art, the nail rubbing operation is permitted when the nail driver is correctly positioned while the nail rubbing operation is not permitted when the nail dresser is not positioned correctly.

While it is convenient for worker safety to allow and disallow the operation based on the sensed power tool position, further technical improvement is desired with respect to a hand-held power tool to reduce the fatigue of the user caused by the user holding the power tool is going to decrease.

SUMMARY OF THE INVENTION

THE PROBLEM TO BE SOLVED BY THE INVENTION

Accordingly, it is an object of the invention to provide a modified hand-held power tool that helps to reduce the fatigue of the user.

MEDIUM TO SOLVE THE PROBLEM

The above-explained problem can be solved by providing a power tool according to claim 1.

In accordance with the present teachings, a representative hand-held power tool is provided that is adapted to perform a predetermined operation by means of a tool bit. The representative power tool is configured to include a tool body, a drive mechanism, and an output changing device. The drive mechanism is adapted to drive the tool bit. The output changing device is adapted to change the output of the tool bit according to a tilt state of the tool body with respect to a standard line. The standard line is provided based on a gravitational force applied to the tool body.

According to the representative hand-held power tool, the change in the output of the tool bit is normally configured by a speed per minute of the tool bit when the tool bit is used to operate a drilling mode or hammer drilling mode. On the other hand, the tool bit output may be configured by hammering rate per minute of the tool bit when the tool bit is used to operate a hammer mode or a hammer drill mode.

Generally, during a drilling operation, the power tool has a possibility of being inadvertently swung around the tool bit when the tool bit is inadvertently jammed by the workpiece. Although such unintentional rocking motion of the power tool is known as a "locked state" of the power tool, it is necessarily required by the user of the power tool to apply further retaining force to the power tool to prevent such a locked condition. Furthermore, during a hammering operation, it is necessarily required by the user to apply more holding force to the power tool in order for the tool bit to advance toward the workpiece for hammering. According to the representative power tool, the output changing device changes the output of the tool bit according to a tilt state of the tool body with respect to a standard line, whereby the fatigue of the user holding the power tool can be reduced.

As an aspect of the representative power tool, the tool bit output may be changeable between a first output value and a second output value that is less than the first output value.

Furthermore, the output changing device may include an acceleration sensor for detecting the tilt state of the tool body.

Further, the drive mechanism may include a drive motor provided with a motor shaft, the output changing device configured to change the tool bit output by changing the rotation of the motor shaft.

Further, the output changing device may detect the inclination value representing the inclination state of the tool body, and compares the slope value with a predetermined standard value and selects one of the first and second output values.

Further, the output changing device selects the first output value when detecting the inclination value corresponding to a state in which the longitudinal axis of the tool bit extends in a substantially vertical direction.

Furthermore, the default value may be configured to be changed manually by a user of the power tool.

Further, the power tool may be provided with a third output value that is an intermediate value between the first and second output values, and the output changing device selects one of the first, second, and third output values based on the tilt state of the tool body with respect to the standard line ,

The output changing device may include a switching member, and the switching member selects an on and off state based on the tilt state of the tool body with respect to the standard line, so that the tool bit output in the on state can be changed while the tool bit output can not be changed.

Furthermore, the representative power tool may include a hammer mechanism, a drilling mechanism, and a mode setting member. The above-explained switching device may preferably be set to the on state in the drilling mode with respect to the operation of the mode setting device, and the switching device may preferably be set to the off state in the hammer mode with respect to the operation of the mode setting device.

Further, the representative power tool may further include a display for indicating the on and off states of the switching device.

Other objects, features and advantages of the present teachings will be more readily understood after reading the following detailed description, together with the accompanying drawings and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

1 Fig. 10 is a front view showing the entire construction of a hammer drill according to a first representative embodiment.

2 FIG. 10 is an enlarged cross-sectional view showing details of a driving mechanism of the hammer drill. FIG.

3 is a schematic block diagram showing a control of the hammer drill.

4 schematically shows a block diagram according to a tilt detection device.

5 is a schematic view showing an operating member.

6 is schematically shows an example of operation of the hammer drill.

7 schematically shows another example of operation of the hammer drill.

8th schematically shows an operation example of the hammer mode.

9 schematically shows an operation example of the hammer mode.

DETAILED DESCRIPTION OF THE INVENTION

Each of the additional features and method steps disclosed above and below may be used separately or in conjunction with other features and method steps to provide and manufacture improved hand-held power tools and methods of using such hand-held power tools and devices used therein. Representative examples of the present invention, examples of which use many of these additional features and method steps in conjunction, will be described in detail with reference to the drawings. This detailed description is merely intended to teach one skilled in the art further details for carrying out preferred aspects of the present teachings and is not intended to limit the scope of the invention. Only the claims define the scope of the claimed invention. Therefore, combinations of features and steps disclosed within the following detailed description may not be necessary to practice the invention in the broadest sense, and instead are merely taught to specifically describe some representative examples of the invention, which is now to be read in detail Reference is made to the attached drawings.

First Representative Embodiment

A first representative embodiment will now be described in detail according to FIG 1 to 9 described. The first representative embodiment is with an electrically powered hammer drill 100 configured as an example of the power tool according to the teachings. The representative hammer drill 100 is by a user of the hammer drill 100 held with his single hand or both hands and used for a job.

The basic construction of the representative hammer drill 100 will now according to 1 and 2 described. 1 shows the entire construction of the hammer drill 100 and 2 shows the details of the drive mechanism of the hammer drill 100 , In this description, a "left side", "right side", "upper side" and "lower side" correspond within the 1 and 2 a "front side", "rear side", "upper side" and "lower side" of the hammer drill 100 ,

The hammer drill 100 contains a tool body 101 at which one bit 119 is releasably attached. Attaching and loosening between the tool bit 119 and the tool body 101 are executed by the user. The bit 119 corresponds to the tool bit. The bit 119 becomes on the tool body 101 attached so that the longitudinal axis of the bit 119 in the front and back of the hammer drill 100 extends.

As in 1 shown is the tool body 101 of the hammer drill 100 mainly with a motor housing 103 , a gearbox 105 and a handle 107 intended. The motor housing 103 takes a drive motor 110 on. The drive motor 110 is an example that corresponds to the "drive motor". The drive motor 110 is with a motor shaft 111 intended. The axis of rotation of the motor shaft 111 crosses perpendicular with an extension direction 119Y of the bit 119 , The axis of rotation of the motor shaft 111 can with the extension direction 119Y do not cross vertically.

The handle 107 is at the rear side portion of the tool body 111 arranged by the user of the hammer drill 100 to be held. The handle 107 is with a pusher 107a provided, which is actuated by the user. When the user releases the pusher 107a pulls (pushes), becomes the drive motor 110 energized. The pusher 107a (and also a mode setting component 650 which will be explained later) has a pusher preventing mechanism (not shown in the drawings). The pusher actuation prevention mechanism is configured to operate the pusher 107a back to the handle 107 to move if the user manually a knob 651 the mode setting component 650 actuated. That's why the pusher 107a partially within the handle 107 added. The pusher preventing mechanism secures the pusher 107a partially inside the handle 107 is received, and prevents the handle operation by the user.

A switch 107b for continuous hammering is front of the pusher 107a arranged. The desk 107b for continuous hammering projects towards the rear side and is released for actuation when the trigger is operated 107a is prevented by the pusher operation prevention mechanism.

As in 2 shown, takes the gearbox 105 a crank mechanism 120 , a striking mechanism 140 and a tool holder rotating mechanism 150 on. The crank mechanism 120 is mainly with a first drive gear 121 at the motor shaft 111 of the drive motor 110 is formed, a driven gear 123 , a crankshaft 125 by the driven gear 123 is rotated, an eccentric shaft 127 , to the crankshaft 125 coupled, and a connecting rod 129 provided with the eccentric shaft 127 is coupled. The crankshaft 127 is on the gearbox 105 by means of an upper bearing and a lower bearing (not specifically shown) rotatably mounted. The motor shaft 111 and the crankshaft 125 are arranged parallel to each other. The eccentric shaft 127 is formed integrally with the crankshaft and has an axis that is from the axis of rotation of the crankshaft 125 is offset. The connection rod 129 couples a piston 131 with the eccentric shaft 127 ,

As in 2 shown, the impact mechanism is mainly with the piston 131 a cylinder 141 , a percussion piston 143 and a firing pin 145 intended. The piston 131 is inside the cylinder 141 slidably extending in an extension direction. The drive motor and the cylinder 141 are arranged so that the respective longitudinal axes intersect. The cylinder 141 is on the back side of the tool holder 159 arranged to an air chamber 141 passing through the piston 131 and the percussion piston 143 is defined to be included. The percussion piston 143 is slidable inside the cylinder 141 arranged to beat a striker for the firing pin 145 to build. The firing pin 145 defines an intermediate means for transmitting the energy of the percussion piston 143 to the bit 119 , The percussion piston 143 is made using a pressure fluctuation (ie, air spring function) of the air chamber 141 caused by the sliding movement of the piston 143 is generated, driven. The percussion piston 143 beats the firing pin 145 and transmits the power to the bit 119 over the firing pin 145 ,

When the impact mechanism 140 works, is the output of the bit 119 , namely the output of the tool bit, by a beat number of the bit 119 defined per predetermined unit of time. In particular, the time unit is defined by one minute. The beat number of the bit 119 is by a reciprocation number of the piston 131 defined, which is proportional to the speed of the motor shaft. Thus, the output of the bit 119 proportional to the speed of the motor shaft 111 Are defined.

As in 2 As shown, the tool holder rotating mechanism is mainly provided with a second driving gear, a driving side member 168 , an intermediate gear 153 , a mechanical torque limiter 167 , a small Kegelzahlrad 155 , a large Kegelzahlrad 157 and the tool holder 159 intended. The tool holder rotating mechanism 150 transmits the torque of the motor shaft 111 to the bit 119 ,

As in 1 and 2 shown holding the tool holder 159 solvable the bit 119 , The tool holder 159 has a cylindrical shape and is relative to the transmission housing 105 rotatable. Furthermore, as in 2 shown is the second drive gear 151 below the first drive gear 121 arranged and is together with the first drive gear 121 turned.

As in 2 shown, the drive-side component has 168 an intermediate gear 168a on. The intermediate gear 168a stands with the second drive gear 151 engaged. The drive-side component 168 is rotated when the second drive gear 151 rotates. The transmission ratio of the drive-side component 168 to the second drive gear 151 is set so that the speed of the drive-side component 168 less than the speed of the second drive gear 151 is. The intermediate shaft 153 is on the drive-side component 168 educated. The intermediate shaft 153 is rotatable by the gear housing 105 rotatably supported by an upper and a lower bearing.

As in 2 shown is a mechanical torque limiter 167 coaxial with the intermediate shaft 153 arranged. The mechanical torque limiter 167 prevents torque transmission to the bit 119 when a torque on the bit 119 exceeds a predetermined value (ie, maximum transmission torque). That means that the mechanical torque limiter 167 as a security measure to protect the bit 119 against excessive torque is used. The mechanical torque limiter 167 is between the small bevel gear 155 and the drive-side component 168 intended. The mechanical torque limiter 167 is mainly with a component 169 the driven side and a spring 167a intended. The component 169 the driven side is connected to the drive-side component 168 engaged and the spring 167a is between the drive-side component 168 and the component 169 provided the driven side. When the torque is on the intermediate shaft 153 is applied, is less than the maximum transmission torque value, by the biasing force of the spring 167a is predetermined, a torque between the drive-side component 168 and the component 169 transmitted to the driven side. Accordingly, the small bevel gear rotates 155 , On the other hand, if the torque acting on the intermediate shaft 153 is applied, exceeds the maximum transmission torque, the torque transmission between the drive-side component 167 and the component 169 prevents the driven side. As a result, the small bevel gear becomes 155 prevented from rotating.

As in 2 shown, the torque is applied to the small bevel gear 155 is transferred, then to the large bevel gear 157 transfer. The torque applied to the small bevel gear 155 is transferred to the large bevel gear 157 transfer that with the small bevel gear 155 engaged. As a result, the torque applied to the large bevel gear 157 is transmitted to the bit 119 over the tool holder 159 as a final output shaft, with the large bevel gear 157 coupled, transmitted.

The hammer drill 100 according to the first representative embodiment includes a hammer drilling mode and a hammer mode for driving the bit 119 , In the hammer drilling mode, the bit becomes 119 for performing a drilling motion by rotating about the extension direction 119Y is defined as in 1 shown, and a hammer movement operated by a linear movement in the extension direction 119Y is defined. Further, besides the first representative embodiment, a drilling mode operation may be performed without the hammer movement of the bit 119 be provided together with the hammer mode and / or hammer drilling mode described above.

(Output change device 400 )

Now, an output changing device 400 according to the 3 to 5 described. The output changing device 400 is near the drive motor 110 inside the motor housing 103 in the tool body 101 arranged. The output changing device 400 includes a tilt detection device 500 and a controller 600 , The control 600 is with a memory 610 , a calculator 611 and a drive signal generator 612 intended. Although the Output change device 400 in the motor housing 103 is arranged, it can, for. B. in the transmission housing 105 or in the handle 107 be arranged.

The tilt detection device 500 includes an acceleration sensor for detecting the tilt state of the tool body 101 , As in 4 shown defines the tilt detection device 500 a vertical line 200 (Top-down direction in 4 ) in relation to the force of gravity acting on the inclination detecting device 500 acts. Furthermore, the tilt detection device defines 500 continue the standard line 210 that the vertical line 200 crosses at a predetermined angle. In the first representative embodiment, the predetermined angle is set at 90 degrees. According to the first representative embodiment, the standard line extends 210 parallel to the extension line 119Y of the bit 119 ,

As in 4 shown by a dashed line is the inclination detecting device 500 in a state to the default line 210 to cross what is referred to in the description as "tilt state". In this tilted state, a component part of the gravity acceleration becomes "G sinusθ" on the tilt detecting device 500 applied. Thus, a voltage value corresponding to the "G sinusθ" becomes the control 600 as an output of the tilt detecting device 500 output. The computer 611 the controller 600 converts the voltage value of the tilt detection device 500 into an angle value that is considered a "detected angle" 310 is defined.

The memory 610 saves a standard angle 220 , The standard angle 220 is considered a standard for comparison with the detected angle 310 used. The standard angle 220 is set as an angle smaller than the angle through the standard line 210 and the vertical line 210 is determined by crossing each other. Thus, when the extending direction of the bit exceeds 119 parallel with the vertical line 200 with respect to the inclination state of the tool body 101 to the standard line 210 becomes, the detected angle 310 the standard angle.

The computer 611 calculates the detected angle 310 and compares the detected angle 310 with the standard angle 220 , As an output of the bit 119 For example, a first output value and a second output value smaller than the first output value are provided. The comparison result of the calculator 611 gets to the drive generator 612 transmitted. When the detected angle 310 It results in not being the standard angle 220 exceeds, the drive signal generator provides the second output value. On the other hand, if the detected angle 310 It results in that the standard angle 220 is exceeded, the drive signal generator provides the first output value.

The drive circuit 620 sees the drive current according to the signal of the drive signal generator 612 before and thus becomes the drive motor 110 driven to rotate. As described above, the tool bit output value is set by selecting one of the first output value and the second output value according to the tilt state.

As in 3 shown contains the hammer drill 100 an output display 630 , a switching component 640 and a mode setting component 650 , in the 5 are shown. 5 is a plan view of the tool body 101 according to 1 , In 5 the hatched part corresponds to the state in which the light-emitting diode is turned on. As in 5 are shown, the output indicator, the switching device 640 and the mode setting component 650 within a frame 710 arranged. The area within the frame 710 is considered a business component 700 designated.

The output display 630 is by arranging a plurality of LEDs 631 designed to visually display the height of the tool bit output. In 5 There are five LEDs and four LEDs are on.

The switching component 640 is positioned in one of an on state and an off state. In the on state, the output of the bit 119 according to the detected angle 310 changed while in the off state, the output of the bit 119 not changed. In other words, activates and deactivates the Schalbauteil 640 the output changing device 400 , In the first representative embodiment, the user of the hammer drill 100 manually the on and off state of the switching device 640 using a function-on-switch 641 and a function-off switch 642 which is independent of the function-on switch 641 is provided, choose. Each one of the function-on switch 641 and from the function-off switch 642 is provided with an LED to indicate the activation and non-activation state.

The mode setting component 650 is used to select the drive mode between the hammer mode and the hammer drill mode. As in 5 shown contains the mode setting component 650 a knob 651 which is rotatable for selecting the respective positions 651a . 651b and 651c is provided. When the adjusting knob 651 in position 651a or 651c is set, is the hammer drill 100 in the hammer mode. When the adjusting knob 651 in position 651b is set, is the hammer drill 100 in the hammer drilling mode. If the User of the hammer drill 100 the adjusting knob 651 in the position 651c turns, the whole pusher 107 or part of the pusher 107 inside the handle 107 received by the pusher preventing mechanism and the pusher 107a can not be operated. In this state, the user of the hammer drill 100 continue to select the button for continuous hammering.

(Operation of the hammer drill 100 )

The operation of the hammer drill 100 according to the first representative embodiment is according to 6 to 9 described. 6 and 7 show the mode of operation in the case where the hammer drill 100 is used in the hammer drilling mode. Further show 8th and 9 the operating mode in the case where the hammer drill 100 is used in the hammer mode. In 6 to 9 is the function-on switch 641 in an ON state. The value of the standard angle 220 is set to 45 degrees. The value of the output of the tool bit becomes when the speed of the motor shaft 111 is maximum, referred to as the first output value of the tool bit. In the case where the first output value of the tool bit is at 100%, the output value of the tool bit at 80% is referred to as the second output value of the tool bit.

In the case of the hammer drilling mode, which is in 6 and 7 shown is the drill bit 119a as the bit 119 selected. 6 shows the state in which the user performs a work against the ground surface by holding the hammer drill with his hand. The floor surface and the user are not shown for the sake of simplicity. In this case, the extension direction runs 119Y parallel to the vertical line 200 and the value of the detected angle 310 is determined as 90 degrees. The value of the detected angle 310 exceeds the value of the standard angle 220 , As a result, the output value of the tool bit is set as the first output value of the tool bit. In this state, the weight of the hammer drill 110 in addition to the hammer drill 110 as a force that the drill bit 119a pressed against the workpiece, applied. Accordingly, it is sufficient that the user only "has the power to hold the hammer drill 100 To create no blocking phenomenon "mainly the hammer drill 100 adds. Therefore, the user can safely and easily perform the operation without feeling any noticeable physical fatigue.

7 Fig. 12 shows the state in which the user performs the operation against the wall surface extending in the vertical direction by holding the hammer drill 100 with the user's hand and essentially horizontal straightening of the drill bit 119a , In 7 For simplicity, the wall surface and the user are not shown. And the extension direction 119Y of the drill bit 119a is substantially perpendicular to the vertical line 200 ,

In this case, the value of the detected angle 310 essentially determined as zero degrees. In other words, the value of the detected angle 310 does not exceed the standard angle 220 , As a result, the output value of the tool bit is determined as the second output value of the tool bit.

In this condition, the user takes the weight of the hammer drill 100 with his hand up. In addition to storing the weight of the hammer drill 100 the user needs the drill bit 119a Press on the wall surface and "the force to hold the hammer 100 To create no blocking phenomenon "the hammer drill 100 Add. However, since the output value of the tool bit is fixed to the second output value of the tool bit, "the force for holding the hammer drill 100 to cause no blocking phenomenon "are reduced in comparison with the first output value of the tool bit. Therefore, it is not necessarily required by the user to apply an excessive force to perform the operation. As a result, the user's physical fatigue can be reduced.

In the case of the hammer mode used in 8th and 9 is shown is the hammer bit 119b as the bit 119 selected. 8th shows the state in which the user performs a work against the ground surface by holding the hammer drill 100 by hand. In 8th For simplicity, the floor surface and the user are omitted. Here is the extension direction 119Y of the hammer bit 119b parallel to the vertical line 200 , In this case, 90 degrees becomes the value of the detected angle 310 detected. That is, the condition is such that the value of the detected angle 310 over the value of the standard angle 220 goes. As a result, the output value of the tool bit is regarded as the first output value of the tool bit.

In this condition, the weight of the hammer works 100 as a force, the hammer bit 119b press against the processed object. The weight of the hammer drill 100 also works as "the reaction force to the force of the hammer hitting the ground surface". As a result, the user adds only one force to the bearing of the hammer drill 100 added that this does not fall over. Accordingly, the user can be safe and fast perform the work without absorbing heavy physical stress.

9 Fig. 14 shows the state in which the user performs the operation against the wall surface extending in the vertical direction by holding the hammer drill 100 with the hand and the drill bit 119b directed essentially horizontally. In 9 the appearance of the wall surface and the user are omitted for simplicity. In this state, the extension direction 119Y of the hammer bit 119b substantially perpendicular to the vertical line 200 , In this case, almost zero degrees becomes the value of the detected angle 310 detected. That is, the condition is such that the value of the detected angle 310 not the value of the standard angle 220 exceeds. As a result, the output value of the tool bit is determined as the second output value of the tool bit.

In this condition, the user takes the weight of the hammer drill 100 with the hand up. In addition, the user presses the hammer bit 119b against the wall surface and adds "a reaction force against the force of the hammer bit 119 adding the wall beats ". However, the output value of the tool bit is the second output value, and the "reaction force against the force of the hammer bit 119 that hits the wall surface "is reduced compared to the first output value of the tool bit. As a result, the user can perform a work safely and easily without any physical burden. In the case of the hammer drill 100 According to this representative embodiment, the fatigue of the user can be reduced.

As the other aspects of the invention, the second to fifth representative embodiments will now be described below. In these descriptions, the same designations and references as in the first embodiment are used 1 to 9 are shown.

Second Representative Embodiment

As another aspect, the hammer drill 100 another controller 600 which has a different construction from the one used in the above-described first representative embodiment. Within the control 600 According to the second representative embodiment, the first output value of the tool bit is given by the drive signal generator 612 set when the detected angle 310 90 degrees (corresponding to one in 6 and 8th shown state). On the other hand, the second output value of the tool bit becomes the drive signal generator 612 set when the detected angle 310 Zero degrees is (corresponding to one in 7 and 9 shown state). Furthermore, a third output value is provided by the drive signal generator 612 as an intermediate value between the first and second output values of the tool bit. For example, 90% of the first output value of the tool bit is set as the third output value of the tool bit and the third output value is determined by the drive signal generator 612 set when the detected angle 310 45 degrees. As a further aspect of the second representative embodiment, one or a plurality of further intermediate outputs of the tool bit other than the first, second, and third representative embodiments may be provided for accurately and accurately controlling the reduction in fatigue of the operator of the hammer.

Third Representative Embodiment

As another aspect, the hammer drill 100 another controller 600 in which the standard angle 220 can be manually and variably set by the user, for example using a knob.

Fourth Representative Embodiment

As another aspect, the hammer drill 100 another controller 600 in which the mode setting component 650 and the switching component 640 coupled together. For example, when the user enters the hammer drilling mode by means of the mode setting component 650 selects, the function-on switch 641 activated as it activates the mode setting component 650 coupled in the hammer drilling mode. And when the user selects the hammer mode, it becomes the function-off switch 642 activated as it activates the mode setting component 650 coupled in the hammer mode.

Fifth Representative Embodiment

As another aspect, the hammer drill 100 another tilt detection device 500 in which a tilt detecting device other than the acceleration sensor is used. For example, the inclination detecting device may be provided with a ball member, a touch sensor, and a track. The ball may be disposed within the track and may be in accordance with the inclination of the tool body 101 be movable. The touch sensor may be installed at one end of the web.

Therefore, if that of the tool body 101 is tilted, the ball moves within the track to touch with the touch sensor, and thus a tilt state is detected.

The first to fifth representative embodiments were explained by a hammer drill. On the other hand, the teachings may preferably be applied to power tools other than the hammer drill, such as a disk sander and a screwdriver.

Furthermore, the following features and aspects can be realized in combination with each of the features of the claims.

The power tool further includes a display for indicating the on and off state of the switching device.

The power tool in which the second output value is set to approximately 80% of the first output value.

The power tool further includes a standard angle display indicative of the predetermined default value.

The power tool in which the output changing device includes a tilt detecting circuit that detects the tilt state of the tool body.

The power tool is defined as a hammer drill.

(Corresponding relationships between the structural elements of the embodiments and the structural elements of the teachings)

The corresponding relationship between the structural elements of the embodiments and the structural elements of the teachings are as follows:
The hammer drill 100 is an example of a configuration that corresponds to the "power tool".

The bit 119 is an example of a configuration that corresponds to the "tool bit".

The tool body 101 is an example of a configuration that corresponds to the "tool body".

The drive motor 110 is an example of a configuration that corresponds to the "drive motor".

The motor shaft 111 is an example of a configuration corresponding to the "motor shaft".

The impact mechanism 140 is an example of a configuration that corresponds to the "impact mechanism".

The tool holder rotating mechanism 150 is an example of a configuration that corresponds to the "tool holder rotating mechanism".

The output changing device 400 is an example of a configuration corresponding to the "output changing device".

The standard line 210 is an example of a configuration that corresponds to the "default line".

The detected angle 310 is an example of a configuration corresponding to the "detected angle".

The standard angle 220 is an example of a configuration that is the "standard angle 220 "Corresponds.

The switching component 640 is an example of a configuration that corresponds to the "shell component".

The mode setting switch 650 is an example of a configuration corresponding to the "mode setting switch".

The shift indicator 643 is an example of a configuration that corresponds to the "shift indication".

It is explicitly pointed out that all features disclosed in the description and / or the claims are considered separate and independent of each other for the purpose of original disclosure as well as for the purpose of limiting the claimed invention independently of the feature combinations in the embodiments and / or the claims should. It is explicitly stated that all range indications or indications of groups of units disclose every possible intermediate value or subgroup of units for the purpose of the original disclosure as well as for the purpose of restricting the claimed invention, in particular also as the limit of a range indication.

LIST OF REFERENCE NUMBERS

100

Rotary Hammer

101

tool body

103

motor housing

105

gearbox

107

handle

107a

handle

107b

Switch for continuous hammering

110

drive motor

111

motor shaft

119

bit

119a

drill bit

119b

hammer bit

119Y

extension direction

120

crank mechanism

121

first drive gear

123

driven gear

125

crankshaft

127

eccentric shaft

129

connecting rod

131

piston

140

impact mechanism

141

cylinder

141

air chamber

143

percussion piston

145

firing pin

150

Tool holder rotation mechanism

151

second drive gear

153

intermediate shaft

155

small bevel gear

157

big bevel gear

159

toolholder

167

mechanical torque limiter

167a

feather

168

drive-side component

168a

intermediate gear

169

Component of the driven side

200

vertical line

210

standard line

220

standard angle

300

recorded line

310

detected angle

400

Output change device

500

Tilt detection device

600

control

610

Storage

611

computer

612

Drive signal generator

620

drive circuit

630

output display

631

light emitting diode

640

switching device

641

Function-on switch

642

Function-off switch

643

switch display

650

Mode determining component

651

knob

651a

first position

651b

second position

651c

third position

700

operating component

710

frame

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2012-11543 [0002]

Claims (10)

Hand-held power tool ( 100 ), which performs a predetermined operation by means of a tool bit ( 119 ), with a tool body ( 101 ), a drive mechanism used to drive the tool bit ( 119 ), and an output changing device ( 400 ), characterized in that the output changing device ( 400 ), the output of the tool bit ( 119 ) according to a tilt state of the tool body ( 101 ) with respect to a standard line ( 210 ), where the default line ( 210 ) based on a gravitational force acting on the tool body ( 101 ) acts, is provided. Power tool ( 100 ) according to claim 1, wherein the tool bit output between a first output value and a second output value which is smaller than the first output value, changeable. Power tool ( 100 ) according to claim 1 or 2, wherein said output changing device ( 400 ) an acceleration sensor for detecting the tilt state of the tool body ( 101 ) having. Power tool ( 100 ) according to one of claims 1 to 3, wherein the drive mechanism comprises a drive motor ( 110 ) provided with a motor shaft ( 111 ) is provided, wherein the output changing device ( 400 ) for changing the tool bit output by changing the rotation of the motor shaft ( 111 ) is configured. Power tool ( 100 ) according to one of claims 2 to 4, wherein the output changing device ( 400 ) detects the slope value that determines the tilt state of the tool body ( 101 ), and compares the slope value with a predetermined standard value, and selects one of the first and second output values. Power tool ( 100 ) according to claim 5, wherein the output changing device ( 400 ) selects the first output value when the slope value corresponding to a state in which the longitudinal axis of the tool bit ( 119 ) extends substantially in a vertical direction. Power tool ( 100 ) according to claim 5 or 6, wherein the default value is configured to be manually set by a user of the power tool ( 100 ) to be changed. Power tool ( 100 ) according to one of claims 2 to 7, wherein the power tool ( 100 ) is further provided with a third output value that is an intermediate value between the first and second output values, and the output changing device selects one of the first, second, and third output values based on the tilt state of the tool body ( 101 ) with respect to the standard line ( 210 ) selects. Power tool ( 100 ) according to one of Claims 1 to 8, in which the output changing device is a switching component ( 640 ), and the switching component ( 640 ) an on and off state based on the tilt state of the tool body ( 101 ) with respect to the standard line ( 210 ), so that the tool bit output in the on state can be changed while the tool bit output can not be changed. Power tool ( 100 ) according to claim 9, having a hammer mechanism for linearly driving the tool bit ( 119 ) in a longitudinal direction of the tool bit ( 119 ), a drilling mechanism adapted to rotate the tool bit ( 119 ) about the longitudinal direction of the tool bit ( 119 ) is adapted to a mode setting component ( 650 ) for selecting the hammer mode and the drilling mode in which the switching component ( 640 ) in the drilling mode with respect to the operation of the mode setting component (FIG. 650 ) is set in the on state, and the switching component ( 640 ) in the hammer mode with respect to the operation of the mode setting member (FIG. 650 ) is set in the off state.

Images