System comprising a handheld machine tool, a first and a second accessory, and a handheld machine tool or an accessory

Abstract

The present invention relates to a system, comprising a handheld power tool, a first accessory and a second accessory, wherein the handheld power tool has at least one interface, which is configured to connect the handheld power tool to the first accessory and / or the second accessory, wherein the interface comprises a mechanical interface unit and an electrical interface unit. It is proposed that the interface comprises a communication interface unit.

Description

Technical Field

[0001] The invention relates to a system comprising a handheld power tool, a first and a second accessory, and a corresponding handheld power tool or accessory. Background Art

[0002] DE 20 2012 001 853 U1 discloses an electric machine tool having an interface via which the electric machine tool can be mechanically and electrically connected to a battery pack, and an additional terminal which can be conductively connected to the battery pack and is provided for attaching an external electric device via which the external electric device can be supplied with energy from the battery pack. Summary of the invention

[0003] The invention relates to a system comprising a handheld power tool, a first accessory and a second accessory, wherein the handheld power tool has at least one interface which is configured to connect the handheld power tool to the first accessory and / or the second accessory, wherein the interface comprises a mechanical interface unit and an electrical interface unit. It is proposed that the interface comprises a communication interface unit. Advantageously, the interface can thus be used to transmit data and information to different accessories.

[0004] The handheld power tool is configured as a handheld, especially hand-guided and portable power tool during processing. The handheld power tool can be configured as an electric drill, electric hammer, electric pick, angle grinder, eccentric grinder, saw, screwdriver, impact drill screwdriver, grinding tool or the like. The handheld power tool can be configured as a mains-powered device, which can be attached to a power supply device, such as a power grid or a generator via a cable. Alternatively, the handheld power tool can also be configured as a battery-powered handheld power tool that can be supplied with energy via at least one battery pack. The handheld power tool has a drive unit, which includes an electric motor. In addition, the handheld power tool has a tool receiving part, in which an inserted tool can be fixed in a releasable manner. The inserted tool can be configured as a drill bit, a chisel bit, a dividing disc, a grinding disc, a batch head or the like according to the type of the handheld power tool. The tool receiving part is coupled to the drive unit so that the drive motion can be transmitted from the electric motor to the inserted tool. Preferably, the drive motion is transmitted from the drive unit to the tool receiving part via a transmission device.

[0005] The accessory, when mounted on the handheld power tool, has at least one function, which in particular differs from a pure data processing function. The accessory can be designed, for example, as a protective cover for an angle grinder for protecting an operator; a dust extraction device for removing dust from the work site of the handheld power tool; an additional handle for providing an additional gripping surface for the operator; or the like. Additionally or alternatively, the accessory can also have at least one function that can be electronically controlled by a control unit. The accessory can be designed, for example, as a work site lighting device or a measuring device, such as a drilling depth gauge. It is also conceivable that the accessory has its own drive unit, such as a motor, which is controlled by a control unit and drives a fan of the dust extraction device.

[0006] The accessory is in particular releasably connected to the handheld machine tool via the interface. A releasable connection is to be understood in particular as a connection that can be releasably connected without tools. The mechanical interface unit is configured for a force-locking and / or form-locking connection between the handheld machine tool and the first accessory and / or the second accessory. The mechanical interface unit preferably comprises a guide element, such as a guide rail or a guide groove, which is configured for guiding during the connection process. In addition, the mechanical interface unit preferably comprises at least one operating element, by which the lock between the handheld machine tool and the first accessory and / or the second accessory is unlocked. The operating element can be configured, for example, as a button or a switch. Preferably, the mechanical interface unit comprises at least one locking element, which is configured for locking the handheld machine tool to the first accessory and / or the second accessory.

[0007] The communication interface unit is configured to exchange data and information. The communication interface unit has, in particular, an electronic device configured to receive and / or send data via at least one communication contact element. The electronic device preferably has a circuit board, a microcontroller and / or a memory unit. For example, operating information can be sent or exchanged between the handheld machine tool and the first and / or second accessories via the communication interface. The operating information can, for example, relate to the operating state of the handheld machine tool, such as an open / closed state. The operating information can also relate to an operating mode, such as an operating mode with a low or high speed of an insert tool or an electric motor, an operating mode with a high or low torque, etc. For example, tool information can be sent or exchanged between the handheld machine tool and the first and / or second accessories via the communication interface. Tool information can, for example, relate to identification or firmware upgrade of the handheld machine tool and / or accessories. Preferably, the first and / or second accessories are configured to be controllable or adjustable via the communication interface unit.

[0008] In addition, it is proposed that the mechanical interface unit is configured to mechanically connect the housing of the handheld machine tool to the housing of the first accessory and / or the housing of the second accessory. The housing of the handheld machine tool is particularly configured as an external housing, in which the drive unit is arranged. The housing is preferably configured in multiple parts and can be made of metal material and / or plastic. The housing of the handheld machine tool particularly includes at least one gripping area or handle that is integrally configured with the housing. The housing of the accessory is preferably configured as an external housing, in which, for example, a functional unit, a drive unit or a control unit of the accessory can be arranged. The mechanical connection is preferably achieved by force-locking and / or form-locking connection. The housing of the first accessory and / or the second accessory can be directly fixed to the housing of the handheld machine tool. Alternatively, it is also conceivable that the housing of the first accessory and / or the second accessory can be indirectly fixed to the housing of the handheld machine tool, for example, via an additional handle that can be releasably fixed.

[0009] Furthermore, it is proposed that the electrical interface unit is configured to connect the handheld power tool and the first accessory and the second accessory to each other in such a way that energy can be transferred from the handheld power tool to the first accessory or the second accessory for providing power to the first and second accessories. In particular, the electrical interface unit has two electrical contact elements, namely a positive contact and a negative contact.

[0010] It is further proposed that the communication interface unit has at least one contact element assigned to the handheld power tool and a contact element assigned to the first accessory or the second accessory, which contact elements are designed for transmitting information when in contact with one another.

[0011] Furthermore, it is proposed that the electrical interface unit and the communication interface unit are integrally configured, in particular as a USB interface. Advantageously, a particularly compact configuration can be achieved thereby. In particular, the electrical interface unit and the communication interface unit are arranged in a plug or a socket.

[0012] Furthermore, it is proposed that the USB interface is arranged on the housing of the handheld power tool and / or on the housing of the battery pack of the handheld power tool. The handheld power tool and / or the battery pack can each have one, two or more USB interfaces. Advantageously, in this way, multiple accessories can be supplied with energy simultaneously or one accessory with very high power can be supplied with energy via these USB interfaces.

[0013] It is further proposed that a power of at least 100 Watts, in particular at least 120 Watts, preferably at least 150 Watts, can be transmitted via the interface, in particular via at least one USB interface.

[0014] The invention further relates to a handheld power tool or a battery pack as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Further advantages are obtained from the following description of the drawings. The drawings, the specification and the claims contain a plurality of feature combinations. A person skilled in the art can also regard these features individually and summarize them into other meaningful combinations. In the different embodiments shown, identical or similar features are provided with the same reference numerals and are characterized by additional letters.

[0016] The accompanying drawings show:

[0017] Figure 1 A side view of a handheld power tool according to the present invention, having a first accessory;

[0018] Figure 2 a side view of the handheld power tool with a second accessory;

[0019] Figure 3 Side view of the handheld power tool with a third accessory. DETAILED DESCRIPTION

[0020] exist Figure 1 1 shows a system 10, which includes a handheld power tool 12 and an accessory 100. The handheld power tool 12 is configured as an electric hammer, for example. The handheld power tool 12 has a housing 14, which is configured as an external housing. A drive unit 18 with an electric motor 16 and a transmission device 20 with an impact mechanism are arranged in the housing 14. A tool receiving part 22 is arranged at the front end of the handheld power tool 12, which is used to receive an inserted tool 24, which can be configured as a rock drill or a chisel, for example. The inserted tool 24 can be driven to rotate around a working axis 26 or to impact along the working axis 26 according to the operating mode of the handheld power tool 12. A handle 28 is arranged at the rear end of the handheld power tool 12. The handle 28 damps the vibration caused by the impact mechanism during the operation of the handheld power tool 12 via a damping unit 30. An operating switch 32 is arranged on the handle 28, and the handheld power tool 12 can be turned on and off or controlled by the operating switch. A battery receptacle 34 is arranged under the handle 28, by which a battery pack 36 is releasably fixed to the housing 14 of the handheld power tool 12. The battery pack 36 has a battery pack housing 38, in which ten battery cells are arranged in two layers, for example. The battery pack 36 is configured as a replaceable battery pack, which is removed from the handheld power tool 12 for charging and connected to a charger (not shown). The handheld power tool 12, in particular the drive unit 18 of the handheld power tool 12, is supplied with energy via the battery pack 36. In addition, the handheld power tool has an interface 40, via which the handheld power tool 12 can be connected to the accessory 100. The interface 40 includes a mechanical interface unit 42, an electrical interface unit 44 and a communication interface unit 46.

[0021] The attachment 100 is configured as a dust suction device, through which the drill cuttings at the processing site can be sucked away during the operation of the handheld machine tool 12. The attachment 100 has a housing 102, in which a drive unit 104 is arranged. The drive unit 104 includes an electric motor 106, which drives a fan 108. The attachment 100 also has a dust collection chamber 110, which can be releasably fixed in the housing. A filter element, such as a folded filter, is arranged in the dust collection chamber 110. The attachment 100 also has a suction head 112 on its front end located at the end side. The suction head 112 is supported in a linear motion by a telescopic unit 114. The suction head has a cylindrical opening 116, through which the insert tool 24 sinks during the drilling process. The suction opening of the dust suction device is arranged in the region of the cylindrical opening 116, through which the drill cuttings are received and transported to the dust collection chamber 110 by the air flow generated by the fan 108.

[0022] The housing 14 of the handheld power tool 12 is releasably connected to the housing 102 of the accessory 100 via the mechanical interface unit 42. The connection is realized in particular by force-locking and / or form-locking connection by means known to those skilled in the art, such as corresponding guide elements and latching connections. The mechanical interface unit 42 also includes an operating element 118, which is arranged on the housing 102 of the accessory 100. The latching connection or locking between the handheld power tool 12 and the accessory 100 can be advantageously released by the operating element 118.

[0023] The electrical interface unit 44 and the communication interface unit 46 are integrated and are configured as a USB interface 48, in particular a USB interface Type C PD, for example. The tool-side USB interface 48 is configured as a socket, for example. In the state connected to the accessory 100, the USB interface 48 of the handheld power tool 12 cooperates with the corresponding USB interface 120 of the accessory 100. The USB interface 120 of the accessory is configured as a plug, for example.

[0024] The USB interface 48 of the handheld power tool 12 is connected to an electronic device 50, which is arranged in the housing 14 of the handheld power tool 12. In addition, the USB interface 48 of the handheld power tool 12 is connected to the battery pack 36, in particular via the electronic device 50. The USB interface 120 of the accessory 100 is connected to the electronic device 122 of the accessory 100. In particular, the USB interface 120 of the accessory is connected to the drive unit 104, preferably via the electronic device 122. Thus, the accessory 100 can be powered by the battery pack 36 connected to the handheld power tool 12b via the USB interface 48. Preferably, the USB interface is configured to transmit a power of 80 watts to 120 watts, preferably approximately 100 watts.

[0025] The electronic device 50 of the handheld machine tool 12 is connected to the electronic device 122 of the accessory 100 via the USB interface 48. For example, device information, such as device information about the model or type of the handheld machine tool 12 and / or the model or type of the battery pack 36, can be transmitted to the accessory 100, in particular to the electronic device 122 of the accessory 100, via the electronic device 50 of the handheld machine tool 12. Alternatively or additionally, it is conceivable that device information, such as the model or type of the accessory 100, is transmitted to the handheld machine tool 12, in particular to the electronic device 50 of the handheld machine tool 12, via the electronic device 122 of the accessory 100. Advantageously, it can be ascertained via the electronic device 50 of the handheld machine tool 12 and / or the electronic device 122 of the accessory 100 whether the devices can be operated together with one another as intended. Furthermore, it is also conceivable that control signals are sent from the handheld power tool 12 or the electronic device 50 of the handheld power tool 12 to the electronic device 122 of the accessory 100 via the USB interface 48 in order to control the drive unit 104 of the accessory 100 .

[0026] The accessory 100 configured as a dust suction device, for example, does not have its own power supply device. However, it is also conceivable that the accessory 100 has a battery pack for power supply and transmits only data or information for identification and / or control via the USB interface 48. Similarly, the arrangement or fixing point of the accessory 100 on the handheld machine tool 12 is to be regarded as an example. The accessory 100 is fixed, for example, on the front side 52 of the handheld machine tool 12, which faces the tool receiving part 22. It is also conceivable that the accessory 100 configured as a dust suction device is fixed next to the handheld machine tool 12. It is also conceivable that the accessory 100 can be fixed on the additional handle 54. The additional handle 54 is preferably releasably connected to the handheld machine tool 12, in particular the housing 14 of the handheld machine tool 12. The additional handle 54 is arranged in the area of ​​the tool receiving part 22.

[0027] exist Figure 2 middle, Figure 1The handheld power tool 12 is connected to another accessory 100a via an interface 40. The accessory 100a is configured as a work position lighting device and has a housing 102a, in which a functional unit 126a having an illumination element 124a is arranged. The illumination element 124a is preferably configured as an LED illumination device. The mechanical interface unit 42 is arranged on the additional handle 54 of the handheld power tool 12 so that the accessory 100a can be fixed on the additional handle 54 of the handheld power tool 12. The accessory 100a has a USB interface 120a on its side facing away from the illumination element 124a, and the USB interface is configured as a socket, for example. Because the housing 14 of the handheld power tool 12 is not directly attached to the housing 102a of the accessory 100a, the USB interface 48 of the handheld power tool 12 and the USB interface 120a of the accessory 100a are connected to each other via a connecting line 61. Advantageously, the accessory 100a can be connected to the battery pack 36 via the handheld power tool 12 for energy supply. Preferably, device information can be transmitted, in particular exchanged, between the handheld power tool 12 and the accessory 100a via the USB interface 48. Advantageously, the accessory 100a can also be controlled by the electronic device 50 of the handheld power tool 12. The accessory 100a can, for example, be switched on or off or the lighting intensity of the accessory 100a can be adjusted by the electronic device 50 during operation of the handheld power tool 12.

[0028] exist Figure 3 middle, Figure 1 The handheld machine tool 12 is connected to another accessory 100b, which is designed as a measuring device. The measuring device is designed, for example, as a distance measuring device, by which the distance 127 between the accessory 100b and the workpiece 128 to be processed can be determined. The accessory 100b has a housing 102b, in which a sensor 130b of a functional unit 126b is arranged. The handheld machine tool 12 is connected to the accessory 100b via an interface 40. The mechanical interface unit 42 connects the housing 14 of the handheld machine tool 12 to the housing 102b of the accessory 100b by force locking and form locking. The USB interface 48 of the handheld machine tool 12 and the USB interface 120b of the accessory 100b are similar to each other. Figure 1Structure and connection. An electronic device 122b is also arranged in the housing 102b of the accessory 100b, and the sensor 130b can be controlled or adjusted by the electronic device. Preferably, the data obtained by the sensor 130b is at least temporarily stored in the electronic device 122b. The sensor 130b can be configured as an optical sensor or an ultrasonic sensor, for example. The accessory 100b configured as a measuring instrument is supplied with energy by means of the power supply device of the handheld machine tool 12 or the battery pack 36 via the USB interface 48. In addition, the instrument information of the handheld machine tool 12 and the accessory 100b is exchanged via the USB interface 48. The data obtained by the sensor 130b can be transmitted from the electronic device 122b of the accessory 100b to the handheld machine tool 12 via the USB interface 48. The electronic device 122b of the accessory 100b and / or the electronic device 50 of the handheld machine tool 12 can advantageously determine the drilling depth through the data obtained by the sensor 130b.

[0029] The handheld power tool 12 shown has, for example, a single USB interface 48, which is arranged on the front side 52 of the housing 14. The number and arrangement are to be regarded as examples. It is also conceivable that the handheld power tool 12 has a second USB interface 48', which is arranged on the upper side 58 of the handheld power tool 12 (see Figure 1 Alternatively or additionally, a USB interface 48″ may also be arranged on the underside 60 and / or the side 62 of the handheld power tool 12 or in the region of the handle 28 (see Figure 2 ). It is also conceivable to arrange one or more battery locations on the battery pack housing 36. Advantageously, multiple USB interfaces 48, 48', 48" can be used to supply energy to multiple accessories 100 at the same time and / or to supply energy to a single high-energy-demand accessory such as a vacuum cleaner.

Claims

1. A system comprising a handheld machine tool (12), a first accessory (100) and a second accessory (100a), wherein: The first accessory (100) is different from the second accessory (100a), wherein the handheld power tool has at least one interface (40) which is designed to releasably connect the handheld power tool (12) to the first accessory (100) and to the second accessory (100a), wherein the interface (40) includes a mechanical interface unit (42) and an electrical interface unit (44), It is characterized in that The interface (40) comprises a communication interface unit (46), the electrical interface unit (44) and the communication interface unit (46) being configured as USB interfaces (48), wherein the mechanical interface unit (42) is configured to mechanically connect a housing (14) of the handheld power tool (12) to a housing (102, 102a) of a first accessory and to a housing (102, 102a) of a second accessory (100, 100a), wherein the housing (102, 102a) of the first accessory and / or the housing (102, 102a) of the second accessory (100, 100a) are fixed to the housing (14) of the handheld power tool (12) via a releasably fixed additional handle (54).

2. The system according to claim 1, characterized in that The electrical interface unit (44) is configured to connect a handheld power tool (12) and a first accessory and / or a second accessory (100, 100a) to each other so that energy can be transferred from the handheld power tool (12) to the first accessory and / or the second accessory (100, 100a) for supplying power to the first accessory and / or the second accessory (100, 100a).

3. The system according to claim 1 or 2, characterized in that: The communication interface unit (46) has at least one contact element assigned to the handheld power tool (12) and a contact element assigned to a first accessory or a second accessory (100, 100a), the contact element assigned to the handheld power tool and the contact element assigned to the first accessory or the second accessory (100, 100a) being configured to transmit information when in contact with each other.

4. The system according to claim 1 or 2, characterized in that: The electrical interface unit (44) and the communication interface unit (46) are integrally constructed.

5. The system according to claim 1 or 2, characterized in that: The USB interface (48) is arranged on a housing (12) of the handheld power tool (100) and / or on a battery pack housing (38) of a battery pack (36) of the handheld power tool (12).

6. The system according to claim 5, characterized in that The handheld power tool (12) and / or the battery pack (36) has a second USB interface (48', 48'').

7. The system according to any one of claims 1, 2 and 6, characterized in that A power of at least 100 watts can be transmitted via the interface (40).

8. The system according to any one of claims 1, 2 and 6, characterized in that The first accessory and / or the second accessory (100, 100a) is configured as a dust suction device (100), a lighting device (100a) or a measuring instrument (100b).

9. The system according to claim 6, characterized in that At least 100 watts of power can be delivered via the at least one USB port (48).

10. The system according to claim 6, characterized in that At least 120 watts of power can be delivered via the at least one USB port (48).

11. The system according to claim 6, characterized in that At least 150 watts of power can be delivered via the at least one USB port (48).

12. The system according to claim 7, characterized in that A power of at least 120 watts can be transmitted via the interface (40).

13. The system according to claim 7, characterized in that A power of at least 150 watts can be transmitted via the interface (40).

14. A handheld power tool for use with a system according to one of the preceding claims.

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