Hand-held power tool with an operating mode detection function, and method

Abstract

The invention relates to a hand-held power tool, in particular a diamond drill, which extends in a longitudinal direction (101), comprising a housing (110) and at least one drive motor (120) provided in the housing (110) for driving an output shaft (140), which has a tool holder (142) for an insert tool. The hand-held power tool is equipped with at least one sensor (180) and an evaluation unit (185), the at least one sensor (180) being designed to detect vibrations occurring during the operation of the hand-held power tool (100), and the evaluation unit (185) being designed to differentiate between a manually guided operation of the hand-held power tool (100) and a stand-guided operation of the hand-held power tool (100) by evaluating the detected vibrations.

Description

[0001] Description

[0002] title

[0003] MACHINE TOOL WITH OPERATING MODE DETECTION AND METHOD

[0004] State of the art

[0005] The present invention relates to a hand-held power tool, in particular a diamond drilling machine, which extends in a longitudinal direction, with a housing and at least one drive motor arranged in the housing for driving an output shaft which has a tool holder for an insert tool.

[0006] A hand-held power tool designed as a diamond drilling machine is known from the prior art. The diamond drilling machine extends in a longitudinal direction and has a housing with at least one drive motor arranged within the housing for driving an output shaft. The output shaft, in turn, has a tool holder for a cutting tool.

[0007] Disclosure of the invention

[0008] The invention relates to a hand-held power tool, in particular a diamond drilling machine, extending in a longitudinal direction, with a housing and at least one drive motor arranged in the housing for driving an output shaft which has a tool holder for an insert tool. At least one sensor and an evaluation unit are provided, wherein the at least one sensor is configured to detect vibrations occurring during operation of the hand-held power tool, and wherein the evaluation unit is configured to distinguish between hand-held and stand-mounted operation of the hand-held power tool by evaluating the detected vibrations.

[0009] The invention thus enables the provision of a hand-held power tool in which, by means of at least one sensor and the evaluation unit, a distinction can be made between hand-held operation and stand-mounted operation of the hand-held power tool, thus enabling safe and reliable operation of the hand-held power tool.

[0010] Preferably, the evaluation unit is designed to classify the operation of the hand-held machine tool as a stand-guided operation if the detected vibrations occur predominantly along the longitudinal direction of the hand-held machine tool.

[0011] This makes it easy to rule out hand-held operation of the hand-held machine tool and to identify stand-held operation.

[0012] The evaluation unit is preferably designed to classify the operation of the hand-held machine tool as hand-guided operation if the detected vibrations occur predominantly along transverse directions of the hand-held machine tool, wherein the transverse directions are arranged perpendicular to the longitudinal direction of the hand-held machine tool.

[0013] This allows for the safe and reliable exclusion of stand-guided operation and the detection of hand-guided operation.

[0014] A rotation control device is preferably provided which is designed to deactivate the drive motor in the event of a tilting of an insert tool driven by the tool holder in a workpiece to be machined, wherein the rotation control device is activated in hand-guided operation and deactivated in stand-guided operation.

[0015] This allows for the simple prevention of unintentional activation of the rotation control device during stand-guided operation, thereby enabling safe stand-guided operation. According to one embodiment, hand-guided operation is preset as the default setting, and the evaluation unit is designed to deactivate the rotation control device during stand-guided operation.

[0016] This ensures trouble-free operation of the hand-held power tool.

[0017] The present invention also relates to a hand-held machine tool system comprising a hand-held machine tool, in particular a diamond drilling machine, which has a first communication means and an evaluation unit, wherein the evaluation unit is configured to distinguish between stator-guided and hand-guided operation of the hand-held machine tool by evaluating a stator operating signal provided by the first communication means, and with a holding device for holding the hand-held machine tool in stator-guided operation, wherein the holding device has a second communication means configured to transmit the stator operating signal to the first communication means when the hand-held machine tool is attached to the holding device.

[0018] The invention thus enables the provision of a hand-held machine tool system with a hand-held machine tool and a holding device, in which a distinction can be made between hand-held operation and stand-held operation of the hand-held machine tool, thus enabling safe and reliable operation of the hand-held machine tool.

[0019] Preferably, the first communication means and the second communication means form a magnetic connection, an RFID connection and / or a Bluetooth connection for transmitting the stator operating signal.

[0020] This allows for the simple transmission of the stator operating signal via a wireless communication link.

[0021] Furthermore, the present invention relates to a method for operating a hand-held power tool, in particular a diamond drilling machine, which extends in a longitudinal direction and has a housing and at least one drive motor arranged in the housing for driving an output shaft, wherein the output shaft has a tool holder for an insert tool, characterized by the following steps:

[0022] • Detecting vibrations occurring during the operation of the hand-held power tool with at least one sensor assigned to the hand-held power tool, and

[0023] • Evaluation of the detected vibrations by an evaluation unit assigned to the hand-held power tool to differentiate between hand-held operation and stand-mounted operation of the hand-held power tool.

[0024] The invention thus enables the provision of a method for operating a hand-held machine tool, in which a distinction can be made between hand-guided operation and stand-guided operation of the hand-held machine tool, and thus a safe and reliable operation of the hand-held machine tool can be enabled.

[0025] Preferably, the differentiation between the hand-guided operation of the hand-held machine tool and the stand-guided operation of the hand-held machine tool by the evaluation unit comprises classifying the operation of the hand-held machine tool as stand-guided operation if the detected vibrations occur predominantly along the longitudinal direction of the hand-held machine tool.

[0026] This makes it easy to identify a stand-guided operation.

[0027] Preferably, the differentiation between hand-held and stand-mounted operation of the hand-held power tool by the evaluation unit comprises classifying the operation of the hand-held power tool as hand-held if the detected vibrations occur predominantly along transverse directions of the hand-held power tool, wherein the transverse directions are arranged perpendicular to the longitudinal direction of the hand-held power tool. Thus, hand-held operation can be reliably and reliably detected.

[0028] Preferably, the differentiation between the hand-guided operation of the hand-held machine tool and the stand-guided operation of the hand-held machine tool by the evaluation unit comprises deactivating a rotation control device of the hand-held machine tool in stand-guided operation, which is designed to deactivate the drive motor in the event of a jamming of an insert tool driven by the tool holder in a workpiece to be machined.

[0029] This makes it easy to prevent the unwanted activation of the rotation control device in stand-guided operation.

[0030] Preferably, hand-held operation is specified as the default setting, in which the rotation control device is activated.

[0031] This enables the safe operation of the hand-held power tool.

[0032] Brief description of the drawings

[0033] The invention is explained in more detail below with reference to exemplary embodiments illustrated in the drawings. The drawings show:

[0034] Fig. 1 shows a perspective view of a hand-held power tool designed as a drilling machine with an evaluation unit,

[0035] Fig. 2 shows a perspective view of a holding device for holding the hand-held power tool from Fig. 1.

[0036] Fig. 3 shows a perspective view of the operation of the hand-held power tool from Fig. 1 with the holding device from Fig. 2, and

[0037] Fig. 4 shows a flowchart of a method for operating the hand-held power tool of Fig. 1 and Fig. 3.

[0038] Description of the exemplary implementations

[0039] In the figures, elements with the same or comparable function are designated with identical reference numerals and described in detail only once. Fig. 1 shows an exemplary hand-held power tool 100 configured as a drill, with a housing 110 in which a drive motor 120 is arranged. The drive motor 120 is designed to drive an output shaft 140. Furthermore, a gearbox 130 is preferably associated with the drive motor 120, the drive motor 120 also being designed to drive the gearbox 130. Preferably, the hand-held power tool 100 is configured as a diamond drill.

[0040] The output shaft 140 preferably has a tool holder 142 for an insert tool (390 in Fig. 3). Furthermore, the output shaft 140 can have a tubular transport section 144 for removing dust and / or drilling particles generated during machining. In this case, the hand-held power tool 100 has an extraction area 150, to which an adapter 152 for connecting to an extraction hose 154 of an external extraction device can be assigned. Thus, during machining, dust and / or drilling particles generated by the hand-held power tool 100 can be transported via the tubular transport section 144 into the extraction area 150 and extracted from there via the adapter 152 and the extraction hose 154.

[0041] The housing 110 of the hand-held power tool 100 features, for illustrative purposes, a handle 115 on which a control element 117 for activating and deactivating the drive motor 120 is arranged. Preferably, the hand-held power tool 100 extends, in particular along a longitudinal direction 101, for illustrative purposes from the output shaft 140 to the handle 115.

[0042] The hand-held power tool 100 has at least one sensor 180 and one evaluation unit 185. The at least one sensor 180 is configured to detect vibrations occurring during operation of the hand-held power tool 100. The evaluation unit 185 is configured to distinguish between hand-held and stand-mounted operation of the hand-held power tool 100 by evaluating the detected vibrations. Preferably, the evaluation unit 185 is configured to classify the operation of the hand-held power tool 100 as stand-mounted operation if the detected vibrations occur predominantly along the longitudinal direction 101 of the hand-held power tool 100. Furthermore, the evaluation unit 185 is designed to classify the operation of the hand-held machine tool 100 as hand-guided operation if the detected vibrations occur predominantly along transverse directions 102, 103 of the hand-held machine tool 100.The transverse directions 102, 103 are arranged perpendicular to the longitudinal direction 101 of the hand-held power tool 100. Preferably, the longitudinal direction 101 is aligned along an x-axis x, the transverse direction 102 along a y-axis y, and the transverse direction 103 along a z-axis z of a coordinate system 199 exemplified by the hand-held power tool 100.

[0043] Alternatively or optionally, a distinction is made between stand-guided operation and hand-guided operation depending on the level of detected vibrations along the longitudinal direction 101 of the hand-held power tool 100. The evaluation unit 185 is designed to classify the operation of the hand-held power tool 100 as stand-guided operation if the detected vibrations along the longitudinal direction 101 of the hand-held power tool 100 are below a predetermined limit value, and to classify the operation of the hand-held power tool 100 as hand-guided operation if the detected vibrations along the longitudinal direction 101 of the hand-held power tool 100 are above the predetermined limit value.

[0044] Preferably, the hand-held power tool 100 has a rotation control device 189, which is designed to deactivate the drive motor 120 if a tool insert (390 in Fig. 3) driven by the tool holder 142 becomes jammed in a workpiece being machined. The rotation control device 189 is preferably activated in handheld operation and deactivated in stand-mounted operation. Preferably, handheld operation is specified as the default setting, and the evaluation unit 185 is designed to deactivate the rotation control device 189 in stand-mounted operation.

[0045] Furthermore, the hand-held power tool 100 can have at least one communication means 170, 175, 177. The evaluation unit 185 is preferably designed to distinguish between pedestal-guided and hand-guided operation of the hand-held power tool 100 by evaluating a pedestal operating signal provided by the at least one communication means 170, 175, 177. Therefore, a corresponding holding device (200 in Fig. 2) for holding the hand-held power tool 100 in pedestal-guided operation preferably also has suitable communication means (240, 250, 260 in Fig. 2).

[0046] For example, the hand-held power tool 100 has a power cable 190 for mains power supply. Alternatively, the hand-held power tool 100 can also be designed to operate independently of the mains supply using a battery pack. An optional auxiliary handle 119 is shown for the hand-held power tool 100.

[0047] Fig. 2 shows a holding device 200 for holding the hand-held power tool 100 from Fig. 1 in stand-guided operation. The holding device 200 is illustrated as a drill stand and has a base plate 210 with preferably four fastening means 212 for attachment to a surface. Furthermore, the holding device 200 has a support profile 220, which is fixed to the base plate 210 and stabilized at its end facing away from the base plate 210 by means of a stabilizing rod 217. The stabilizing rod 217 is also fixed to the base plate 220 at its end facing away from the support profile 220. The support profile 220 preferably has a rack 222. The rack 222 interacts with a slide 230, which is movable along a longitudinal extension 202 of the support profile 220. A control element 232 is provided for moving the carriage 230 along the rack 222 or the longitudinal extension 202.The control element 232 has at least one and, for illustrative purposes, three control levers 233.

[0048] Furthermore, a receiving section 235 for receiving the hand-held power tool 100 of Fig. 1 is assigned to the slide 230. The receiving section 235 preferably has an internal recess 236. Such a holding device 200 or such a drill stand is sufficiently known from the prior art, which is why a detailed description is omitted here. According to the invention, the holding device 200 has at least one communication means 240, 250, 260. The at least one communication means 240, 250, 260 is configured to transmit a stand operating signal to the at least one communication means 170, 175, 177 of the hand-held power tool 100 of Fig. 1 when the hand-held power tool 100 of Fig. 1 is attached to the holding device 200.For illustrative purposes only, a first communication device 240 is arranged on the interior recording 236 of the recording section 235, while two further communication devices 250, 260 are arranged on the sled 230.

[0049] Fig. 3 shows a hand-held power tool system 300 with the hand-held power tool 100 from Fig. 1 and the holding device 200 from Fig. 2, during a work operation. Here, the hand-held power tool 100, preferably designed as a diamond drill, is attached to the receiving area 235 of the holding device 200 via a holding area 380, on which the auxiliary handle 119 is arranged in Fig. 1. The longitudinal direction 101 of the hand-held power tool 100 is aligned parallel to the longitudinal extent 202 of the support profile 220 of the holding device 200. An insert tool 390, by way of example designed as a diamond drill, is arranged on the tool holder 142 of Fig. 1 in Fig. 3.

[0050] For illustrative purposes, the hand-held power tool 100 includes the communication device 175, and the holding device 200 includes the communication device 250, as described in Figures 1 and 2. Preferably, the communication devices 175 and 250 form an RFID connection for transmitting the stator operating signal. Here, for example, the communication device 250 is configured as a data carrier or transponder. Preferably, the communication device 250 is configured as a passive transponder, since it does not require its own power supply. The communication device 175 is preferably configured as a readout device and integrated into the hand-held power tool 100.

[0051] Alternatively or optionally, the hand-held power tool 100 includes the communication means 170 of Fig. 1, and the holding device 200 includes the communication means 240 of Fig. 2. In this case, the communication means 170 and 240 preferably form a magnetic connection for transmitting the stator operating signal. Here, the communication means 240 is, for example, designed as a magnetic ring arranged in the receiving area 235 of the holding device 200. In this case, the communication means 170 is preferably designed as a Hall sensor associated with the gearbox 130 of the hand-held power tool 100.

[0052] Alternatively or optionally, the hand-held power tool 100 includes the communication means 177 of Fig. 1, and the holding device 200 includes the communication means 260 of Fig. 2. Preferably, in this case, the communication means 177 and 260 establish a Bluetooth connection for transmitting the stator operating signal. Here, the communication means 260 is, for example, designed as a Bluetooth module arranged in the holding device 200. The communication means 177 is, in this case, designed as a Bluetooth module arranged in the hand-held power tool 100.

[0053] Preferably, the evaluation unit 185 is configured to distinguish between pedestal-guided and hand-guided operation of the hand-held power tool 100 by evaluating a pedestal operating signal provided by one or more of the communication means 170, 175, 177 of the hand-held power tool 100. The communication means 240, 250, 260 of the holding device 200 is configured to transmit the required pedestal operating signal to the communication means 170, 175, 177 of the hand-held power tool 100 when the hand-held power tool 100 is attached to the holding device 200.

[0054] Fig. 4 shows a method 400 illustrating a preferred operation of the hand-held power tool 100 from Fig. 1 and Fig. 3. In a first step 410, the hand-held power tool 100 is activated via the operating element 117. In a further step 420, vibrations occurring during the operation of the hand-held power tool 100 are detected by the sensor 180 assigned to the hand-held power tool 100. Subsequently, in step 430, the detected vibrations are evaluated by the evaluation unit 185 assigned to the hand-held power tool 100 to distinguish between hand-held and stand-guided operation of the hand-held power tool 100.

[0055] In step 440, the evaluation unit 185 classified the operation of the hand-held power tool 100 as hand-guided operation, since the detected vibrations were predominantly along transverse directions 102, 103 of Fig. 1 of the hand-held power tool 100. Subsequently, in step 450, the rotation control device 189 of the hand-held power tool 100 was activated.

[0056] In step 460, the evaluation unit 185 classified the operation of the hand-held power tool 100 as column-guided operation, since the detected vibrations predominantly occur along the longitudinal direction 101 of Fig. 1 of the hand-held power tool 100. In particular, movement in the longitudinal direction 101 is evaluated to detect column-guided operation.

[0057] Subsequently, in step 470, the rotation control device 189 of the hand-held power tool 100 is deactivated. If vibrations outside defined limits or vibrations in the transverse direction 102, 103 are detected during stand-guided operation, the rotation control device 189 is preferably activated.

[0058] It should be noted that the vibrations in the longitudinal direction 101 are also present in hand-held operation, but are not predominant.

[0059] Alternatively or optionally, in step 460 the stand-guided operation can be detected by communication between the hand-held machine tool 100 and the holding device 200.

Claims

Claims 1. Hand-held power tool (100), in particular a diamond drilling machine, extending in a longitudinal direction (101), with a housing (110) and at least one drive motor (120) arranged in the housing (110) for driving an output shaft (140) which has a tool holder (142) for an insert tool (390), characterized by at least one sensor (180) and an evaluation unit (185), wherein the at least one sensor (180) is designed to detect vibrations occurring during operation of the hand-held power tool (100), and wherein the evaluation unit (185) is designed to distinguish between hand-held operation of the hand-held power tool (100) and stand-mounted operation of the hand-held power tool (100) by evaluating the detected vibrations.

2. Hand-held power tool according to claim 1, characterized in that the evaluation unit (185) is designed to classify the operation of the hand-held power tool (100) as stand-guided operation when the detected vibrations occur predominantly along the longitudinal direction (101) of the hand-held power tool (100).

3. Hand-held power tool according to claim 1 or 2, characterized in that the evaluation unit (185) is configured to classify the operation of the hand-held power tool (100) as hand-guided operation when the detected vibrations occur predominantly along transverse directions (102, 103) of the hand-held power tool (100), wherein the transverse directions (102, 103) are arranged perpendicular to the longitudinal direction (101) of the hand-held power tool (100).

4. Hand-held power tool according to one of the preceding claims, characterized in that a rotation control device (189) is provided which is designed to detect, in the event of a tilting of one of the Tool holder (142) of driven insert tool (390) in a workpiece to be machined to deactivate the drive motor (120), wherein the rotation control device (189) is activated in hand-guided operation and deactivated in stand-guided operation.

5. Hand-held power tool according to claim 4, characterized in that hand-guided operation is specified as the basic setting and the evaluation unit (185) is designed to deactivate the rotation control device (189) in stand-guided operation.

6. Hand-held power tool system (300) comprising a hand-held power tool (100), in particular a diamond drilling machine, which has a first communication means (170, 175, 177) and an evaluation unit (185), wherein the evaluation unit (185) is configured to distinguish between pedestal-guided and hand-guided operation of the hand-held power tool (100) by evaluating a pedestal operating signal provided by the first communication means (170, 175, 177), and with a holding device (200) for holding the hand-held power tool (100) in pedestal-guided operation, wherein the holding device (200) has a second communication means (240, 250, 260) which is configured to transmit the pedestal operating signal to the first communication means (170, 175, 177) when the hand-held power tool (100) is attached to the holding device (200). to transfer.

7. Hand-held machine tool system according to claim 6, characterized in that the first communication means (170, 175, 177) and the second communication means (240, 250, 260) form a magnetic connection, an RFID connection and / or a Bluetooth connection for transmitting the stator operating signal.

8. Method for operating a hand-held power tool (100), in particular a diamond drilling machine, which extends in a longitudinal direction (101) and has a housing (110) and at least one drive motor (120) arranged in the housing (110) for driving an output shaft (140), wherein the output shaft (140) has a tool holder (142) for an insert tool (390), characterized by the following steps: • Detecting vibrations occurring during the operation of the hand-held power tool (100) with at least one sensor (180) assigned to the hand-held power tool (100), and • Evaluating the detected vibrations by an evaluation unit (185) assigned to the hand-held machine tool (100) to distinguish between hand-held operation of the hand-held machine tool (100) and stand-mounted operation of the hand-held machine tool (100).

9. Method according to claim 8, characterized in that the differentiation between the hand-guided operation of the hand-held machine tool (100) and the stand-guided operation of the hand-held machine tool (100) by the evaluation unit (185) comprises classifying the operation of the hand-held machine tool (100) as stand-guided operation if the detected vibrations occur predominantly along the longitudinal direction (101) of the hand-held machine tool (100).

10. Method according to claim 8 or 9, characterized in that the differentiation between the hand-guided operation of the hand-held machine tool (100) and the stand-guided operation of the hand-held machine tool (100) by the evaluation unit (185) comprises classifying the operation of the hand-held machine tool (100) as hand-guided operation if the detected vibrations occur predominantly along transverse directions (102, 103) of the hand-held machine tool (100), wherein the transverse directions (102, 103) are arranged perpendicular to the longitudinal direction (101) of the hand-held machine tool (100).

11. Method according to one of claims 8 to 10, characterized in that the differentiation between the hand-guided operation of the hand-held machine tool (100) and the stand-guided operation of the hand-held machine tool (100) by the evaluation unit (185) comprises deactivating a rotation control device (189) of the hand-held machine tool (100) in stand-guided operation, which is designed to deactivate the drive motor (120) in the event of a tilting of an insert tool (390) driven by the tool holder (142) in a workpiece to be machined.

12. Method according to claim 11, characterized in that the hand-guided operation is specified as the basic setting in which the rotation control device (189) is activated.

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