MACHINE TOOL WITH A POWER SUPPLY DEVICE

Description

[0001] The present invention relates to a machine tool, in particular a chisel hammer, comprising a drive, a percussion mechanism device, a control device, a power supply device for supplying the machine tool with electrical energy and a machine tool housing with a first and a second machine tool housing region.

[0002] Machine tools configured as rotary hammers and / or chisel hammers of the type mentioned above are generally known from the prior art. A machine tool according to the preamble of claim 1 is already known from US 2013 / 255980 A1.

[0003] Handling or operating large, hand-held machine tools can be difficult in certain situations, as these machine tools are often heavy and have a balanced mass or weight distribution. Even a slight change in the position of the machine tool can therefore lead to almost uncontrollable destabilization and sudden deflection. As a result, it is also possible that the machine tool is dropped by a user and crashes to the floor. Damage to the machine tool, and in particular to the components of the machine tool's power supply, is therefore possible. Damage to the power supply can occur especially because the components of the power supply are often located in exposed parts of the machine tool.

[0004] It is an object of the present invention to provide a machine tool which enables improved handling and operation and ensures better protection for the power supply of the machine tool.

[0005] The object is achieved by a machine tool, in particular a chisel hammer, comprising a drive, a percussion device, a control device, a power supply device for supplying the machine tool with electrical energy and a machine tool housing with a first and a second machine tool housing area.

[0006] According to the invention, it is provided that the energy supply device can be positioned in one direction between the first and second machine tool housing area, wherein a first interface is provided for connecting the energy supply device to the first machine tool housing area and a second interface is provided for connecting the energy supply device to the second machine tool housing area.

[0007] Both the first and the second interface are designed to establish a removable mechanical connection with the respective first and second machine tool housing areas. The mechanical connection can be designed in the form of a positive and / or non-positive coupling. It is possible for the mechanical connection to be designed in the form of a tongue and groove system or in the form of a rail system. Furthermore, the first and second interfaces are designed to establish a removable electrical connection with the respective first and second machine tool housing areas. With the aid of the electrical connection, electrical energy can be conducted from the energy supply device to the first and / or second machine tool housing areas.Furthermore, the first and second interfaces as well as the energy supply device can be designed such that electrical communication signals can be transported from the first or second machine tool housing area via the energy supply device to the second or first machine tool housing area.

[0008] The machine tool is designed such that the first and second interfaces are configured to releasably connect the energy supply device to the first and second machine tool housing areas.

[0009] According to the invention, the energy supply device is designed as a battery connection device with at least one battery interface for releasably connecting the energy supply device to at least one battery.

[0010] According to an embodiment not according to the invention, it may be possible for the energy supply device to be designed as a mains connection device with a line for releasably connecting the machine tool to a mains power source.

[0011] According to an advantageous embodiment of the present invention, it may be possible for the energy supply device to contain at least one ventilation duct, wherein the at least one ventilation duct extends substantially from a top side to a bottom side of the energy supply device.

[0012] According to an advantageous embodiment of the present invention, it may be possible for the at least one ventilation duct to contain at least one fan for generating an air flow through the at least one ventilation duct.

[0013] According to a further advantageous embodiment, it may be possible for the machine tool to be designed such that a center of gravity of the power supply device and a center of gravity of the tool housing lie essentially at an intersection point between a first and second plane, wherein the first and second planes are arranged perpendicular to each other. This provides a nearly optimal balance and weight distribution, improving the handling of the machine tool.

[0014] Further advantages will become apparent from the following description of the figures. Various embodiments of the present invention are illustrated in the figures. The figures, the description, and the claims contain numerous features in combination. Those skilled in the art will also expediently consider the features individually and combine them into useful further combinations.

[0015] In the figures, identical and similar components are numbered with the same reference numerals. They show: Figure 1 shows a side view of a machine tool with a power supply device in the form of a battery connection device with an internal battery between a first and second machine tool housing area; Figure 2 shows a perspective front view of the machine tool with the battery outside the power supply device designed in the form of a battery connection device; Figure 3 shows a further side view of the machine tool with the battery inside the power supply device designed in the form of a battery connection device; Figure 4 shows a side view of the power supply device designed in the form of a battery connection device with an internally positioned battery and a fan in a ventilation duct; Figure 5 shows a perspective rear view of the power supply device designed in the form of a battery connection device without a battery.Figure 6 shows a further side view of the machine tool with the first and second machine tool housing areas without a power supply device; Figure 7 shows a side view of the machine tool with the power supply device in the form of a mains connection device between the first and second machine tool housing areas; Figure 8 shows a further side view of the machine tool with the power supply device in the form of a mains connection device with a fan in a ventilation duct; and Figure 9 shows a side view of the power supply device in the form of a mains connection device with the fan in the ventilation duct. Examples of implementation:

[0016] Figure 1 and 2shows a machine tool 1 in the form of a chisel hammer. However, the machine tool 1 can also be a hammer drill, combination hammer, or the like. However, it is also possible for the machine tool 1 to be designed in the form of a saw, a grinder, a drill, a hammer drill, a screwdriver, or another hand-held power tool.

[0017] The machine tool 1 essentially contains a machine tool housing 2, a first handle device 3a and a second handle device 3b, a tool holder device 4, a drive 5, a striking mechanism 6, a control device and a power supply device 7, cf. Figures 2 to 4 .

[0018] The energy supply device 7 serves to supply the electrical consumers with electrical energy.

[0019] The drive 5 is designed as an electric motor and serves to drive the impact mechanism 6. The impact mechanism 6 serves to generate impacts or impact pulses. The drive 5 and the impact mechanism 6 are connected to each other. The impact mechanism 6, in turn, is connected to the tool holder 4 in such a way that the impact pulses generated by the impact mechanism 6 are transmitted to the tool holder 4.

[0020] The control device is not shown in the figures.

[0021] The machine tool housing 2 contains a first machine tool housing area 20 and a second machine tool housing area 30. As in Figure 3 As indicated, the drive 5 and the impact mechanism 6 are positioned in the first machine tool housing area 20. As in particular the Figure 2As can be seen, a display device 9 and an input device 10 are provided at an upper end of the second machine tool housing area 20. The display device 9 serves to display various states of the machine tool 1. The input device 10 serves to enter information and to set various states of the machine tool 1.

[0022] The first machine tool housing portion 20 in turn includes a first end 20a and a second end 20b. The second machine tool housing portion 30 also includes a first end 30a and a second end 30b.

[0023] The tool receiving device 4 is positioned at the first end 20a of the first machine tool housing region 20. The tool receiving device 4 serves to receive and hold a tool. The tool is not shown in the figures. In the case of the machine tool 1 being designed in the form of a chisel hammer, the tool is designed as a chisel. Furthermore, the first handle device 3a is positioned at the first end 20a of the first machine tool housing region 20. A first interface 22 is provided at the second end 20b of the first machine tool housing region 20. The first interface 22 serves to detachably connect the first machine tool housing region 20 to the power supply device 7. The first and second ends 20a, 20b of the first machine tool housing region 20 are positioned and aligned essentially one behind the other in direction A.

[0024] A second interface 32 is positioned at the first end 30a of the second machine tool housing portion 30. The second interface 32 serves to releasably connect the second machine tool housing portion 30 to the power supply device 7. The second handle device 3b is positioned at the second end 30b of the second machine tool housing portion 30. The first and second ends 30a, 30b of the second machine tool housing portion 30 are positioned and aligned substantially one behind the other in direction A.

[0025] Both the first and second handle devices 3a, 3b serve to hold and guide the machine tool 1. It is provided that one hand of a user of the machine tool 1 holds the machine tool 1 on the first handle device 3a, and another hand holds the machine tool 1 on the second handle device 3b. The user is not shown in the figures.

[0026] Like the Figures 2 and 3 As can be seen, the second handle device 3b contains an actuating switch 12 for actuating or activating the machine tool 1. The actuating switch 12 is connected to the control device, the energy supply device 7 and the drive 5.

[0027] Like the Figures 3 , 4 , 5 , 8 and 9 The energy supply device 7 contains a first interface 7a and a second interface 7b. With the aid of the first interface 7a of the energy supply device 7, the energy supply device 7 can be releasably connected to the first interface 22 of the first machine tool housing area 20. With the aid of the second interface 7b of the energy supply device 7, the energy supply device 7 can be releasably connected to the second interface 32 of the second machine tool housing area 30.

[0028] In the Figures 1 to 5 The energy supply device 7 is shown in a first embodiment. According to a first embodiment, the energy supply device 7 is designed in the form of a battery connection device with a battery interface 13 for releasably connecting the energy supply device 7 to a battery 14. The energy supply device 7 contains a base body 15 in the form of a shaft-shaped hollow cylinder. The base body 15 essentially contains a first, second, third and fourth side wall 15a, 15b, 15c, 15d. The first and second side walls 15a, 15b as well as the third and fourth side walls 15c, 15d are opposite one another, so that a continuous shaft 16 in the form of a central continuous recess with a receiving volume AV is created in the base body 15. As shown in the Figures 3 to 5As indicated, a fan 17 is positioned in the shaft 16 of the base body 15. The fan 17 serves to generate an air flow LS through the shaft 16 of the base body 15 in order to cool the shaft 16. Each of the four side walls 15a, 15b, 15c, 15d has an inner side 18 and an outer side 19. As particularly shown in the Figure 5 As shown, the first interface 7a is positioned on the outer side 19 of the first side wall 15a. Furthermore, the second interface 7b is positioned on the outer wall 19 of the second side wall 15b. Both the first and the second interface 7a, 7b are designed to establish a detachable mechanical connection with the respective first and second machine tool housing areas 20, 30. The mechanical connection can be designed in the form of a positive and / or non-positive coupling.

[0029] Furthermore, both the first and second interfaces 7a, 7b of the power supply device 7, as well as the first interface 22 of the first machine tool housing area 20 and the second interface 32 of the second machine tool housing area 30, each contain electrical contact elements, so that electrical energy can pass from the power supply device 7 to the first and / or second machine tool housing area 20, 30. The electrical contact elements are not shown in the figures.

[0030] Furthermore, both the first and second interfaces 7a, 7b of the power supply device 7, as well as the first interface 22 of the first machine tool housing area 20 and the second interface 32 of the second machine tool housing area 30, each contain communication elements for transporting communication signals from the first or second machine tool housing area 20, 30 via the power supply device 7 to the second or first machine tool housing area 20, 30. Communication signals can also be sent and / or received from the power supply device 7 to the first and / or second machine tool housing area 20, 30. The communication elements are not shown in the figures.

[0031] The battery interface 13 is positioned on the inner side 18 of the first side wall 15a of the power supply device 7. The fan 17 is arranged below the battery interface 13 in direction C, see. Figure 5. With the help of the fan 17, an air flow LS generated by the fan 17 can cool a rechargeable battery 14 connected to the battery interface 13. With the help of the battery interface 13, a rechargeable battery 14 can be detachably connected to the energy supply device 7 such that the electrical energy stored in the rechargeable battery 14 can be transported from the rechargeable battery 14 to the energy supply device 7. The battery interface 13 is designed such that the rechargeable battery 14 can be pushed in direction C onto the battery interface 13 to create a detachable connection. The battery interface 13 and an upper side of the rechargeable battery 14 have a tongue and groove system for this purpose. The tongue and groove system is not shown in the figures.

[0032] In the Figures 7 to 9The power supply device 7 is shown in a second embodiment. According to a second embodiment, the power supply device 7 is designed in the form of a mains connection device. The power supply device 7 designed as a mains connection device contains a control unit, a transformer, and a line 40 for releasably connecting the machine tool 1 to a mains power source.

[0033] Neither the mains power source, the control unit nor the transformer are shown in the figures.

[0034] Electrical energy can be supplied to the power supply device 7 via the line 40. As already described above, the electrical energy can then be transported from the power supply device 7 to the first and / or second machine tool housing area 20, 30 via the first and second interfaces 7a, 7b.

[0035] As in Figure 8 and9 As indicated, the energy supply device 7 contains a ventilation duct 25 that extends from a first opening 26 on a bottom side 8a to a second opening 28 on a top side 8b over the entire length of the energy supply device 7. The fan 17 is positioned in the ventilation duct 25 such that an air flow LS can flow through the ventilation duct 25 to cool the energy supply device 7.

[0036] Like the Figures 3 and 6 As can be seen, the energy supply device 7 serves to connect the two machine tool housing areas 20, 30 with each other. If, as in Figure 6 As can be seen, the energy supply device 7 is removed, the first and second machine tool housing areas 20, 30 are separated from each other.

[0037] As in Figure 2As shown, the machine tool 1 and in particular the two machine tool housing areas 20, 30 and the energy supply device 7 are designed such that a center of gravity of the energy supply device 7 and a center of gravity of the tool housing 1 lie essentially on a single intersection point 50 of a first and second plane E1, E2, wherein the first and second planes E1, E2 are arranged perpendicular to one another. List of reference symbols

[0038] 1 Machine tool 2 Machine tool housing 3a First handle device 3b Second handle device 3b 4 Tool holder device 5 Drive 6 Impact mechanism 7 Energy supply device 8a Bottom of the ventilation duct 8b Top of the ventilation duct 9 Display device 10 Input device 12 Actuating switch 13 Battery interface 14 Battery 15 Base body 15a First side wall 15b Second side wall 15c Third side wall 15d Fourth side wall 16 Shaft 17 Fan 18 Interior 19 Exterior wall 20 First machine tool housing area 20a First end of the first machine tool housing area 20b Second end of the first machine tool housing area 22 First interface on the first machine tool housing area 25 Ventilation duct 26 First opening of the ventilation duct 28 Second opening of the ventilation duct 30z Second machine tool housing area 30afirst end of the second machine tool housing area 30bsecond end of the second machine tool housing area 32second interface on thesecond machine tool housing area 40Line 50Intersection LSAir flow E1first level E2second level

Claims

1. Power tool (1), in particular chisel hammer, comprising a drive (5), a striking mechanism device (6), a control device, an energy supply device (7) for supplying the power tool (1) with electrical energy and a power tool housing (2) with a first and second power tool housing area (20, 30), wherein the energy supply device (7) can be positioned in one direction (A) between the first and second power tool housing areas (20, 30), wherein a first interface (22) for connecting the energy supply device (7) to the first power tool housing area (20) and a second interface (32) for connecting the energy supply device (7) to the second power tool housing area (30) are provided, wherein the energy supply device (7) is designed as a battery connection device with at least one battery interface (13) for the releasable connection of the energy supply device (7) to at least one battery (14), characterized in that the energy supply device (7) comprises a first interface (7a) and a second interface (7b), wherein by means of the first interface (7a) of the energy supply device (7), the energy supply device (7) can be releasably connected to the first interface (22) of the first power tool housing area (20) and by means of the second interface (7b) of the energy supply device (7), the energy supply device (7) can be releasably connected to the second interface (32) of the second power tool housing area (30) and the interfaces respectively comprise electrical contact elements, so that electrical energy can pass from the energy supply device (7) to the first and / or second power tool housing area (20, 30).

2. Power tool (1) according to Claim 1, characterized in that the energy supply device (7) comprises at least one ventilation duct (25), the at least one ventilation duct (25) extending essentially from an upper side (8b) to an underside (8a) of the energy supply device (7).

3. Power tool (1) according to Claim 2, characterized in that the at least one ventilation duct (25) comprises at least one fan (17) for generating an air flow (LS) through the at least one ventilation duct (25).