Power tool with protective shield support device for rechargeable battery

Abstract

A power tool, particularly a chipping hammer, includes a first side handle, a second side handle, and a tool housing having an interface for releasably receiving and retaining a first rechargeable battery and a second rechargeable battery, wherein a side handle axis extending through the first and second side handles is arranged substantially perpendicular to a working axis extending through the tool housing. The power tool includes a protective device for protecting the first and second rechargeable batteries, the protective device having an internal volume for at least partially receiving the first and second rechargeable batteries.

Description

Technical Field

[0001] The present invention relates to a power tool, in particular a chipping hammer, which comprises a first side handle and a second side handle and a tool housing, wherein the tool housing has an interface device for releasably receiving and retaining a first rechargeable battery and a second rechargeable battery, wherein a side handle axis extending through the first side handle and the second side handle is arranged to be substantially perpendicular to a working axis extending through the tool housing. Background Art

[0002] Drill hammers and / or chiseling hammers of the type mentioned in the introduction are known in principle from the prior art.

[0003] If rechargeable batteries are used to supply power tools with electrical energy, it is advantageous to take specific measures to protect the rechargeable batteries from shocks and other mechanical effects. For example, rechargeable batteries can be quite sensitive to such mechanical effects (such as shocks) or react in a malfunctioning manner.

[0004] Protective devices for rechargeable batteries on power tools (known from the prior art) are often inadequate and complex and can be a hindrance when using the battery-operated power tool. Summary of the Invention

[0005] It is an object of the present invention to provide a power tool comprising an improved protection device for rechargeable batteries which supply electrical energy to the power tool.

[0006] This object is achieved by a power tool, in particular a chipping hammer, which comprises a first side handle and a second side handle and a tool housing, the tool housing having an interface device for releasably receiving and retaining a first rechargeable battery and a second rechargeable battery, wherein a side handle axis extending through the first side handle and the second side handle is arranged substantially perpendicular to a working axis extending through the tool housing.

[0007] According to the present invention, the power tool comprises a protection device for protecting a first rechargeable battery and a second rechargeable battery, said protection device having an internal volume for at least partially receiving the first rechargeable battery and the second rechargeable battery.

[0008] According to an advantageous configuration of the invention, the protective device may have a length in a direction substantially parallel to the side handle axis of between 350 mm and 450 mm, in particular 400 mm. Thus, the protective device has sufficient length to receive and hold two rechargeable batteries.

[0009] According to another advantageous configuration of the present invention, the protective device may include at least one support surface, wherein a plane extending through the at least one support surface is arranged substantially parallel to the side handle axis and / or perpendicular to the working axis. When the power tool is flipped over and placed upside down, the power tool can be set down relatively safely and supported by the support surface. Safely setting down the power tool or placing it upside down is advantageous, in particular, for example, when removing a tool from the power tool.

[0010] According to an advantageous configuration of the invention, it is possible to include at least one auxiliary handle on the tool housing, wherein the at least one auxiliary handle is arranged on the tool housing such that an auxiliary handle axis extending through the at least one auxiliary handle is arranged essentially parallel to the side handle axis and / or perpendicular to the working axis.

[0011] According to a further advantageous configuration of the invention, it is possible for the protective device to comprise a first frame element and a second frame element, wherein the first frame element and the second frame element each comprise a top side and a bottom side, and wherein the first frame element and the second frame element can be releasably connected to each other at the respective top sides, and the first frame element and the second frame element can be releasably connected to the tool housing at the respective bottom sides. This results in a modular design of the protective device. If the first frame element or the second frame element becomes damaged, the damaged frame element can be replaced in a modular and simple manner.

[0012] Further advantages will become apparent from the following description of the accompanying drawings. Various exemplary embodiments of the present invention are illustrated in the accompanying drawings. The drawings, the description, and the claims contain many combined features. Those skilled in the art will readily consider these features individually and combine them to form further useful combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In the accompanying drawings, the same and similar parts are denoted by the same reference numerals. In the accompanying drawings:

[0014] Figure 1 shows a rear view of a power tool having a first side handle and a second side handle and a protection device for protecting a first rechargeable battery and a second rechargeable battery according to a first embodiment;

[0015] Figure 2 shows a front perspective view of a power tool having a first side handle and a second side handle and a protection device for protecting a first rechargeable battery and a second rechargeable battery according to a first embodiment;

[0016] Figure 3 shows a side view of a power tool;

[0017] Figure 4 shows a rear perspective view of the power tool with the first rechargeable battery and the second rechargeable battery positioned outside of the protective device;

[0018] Figure 5 shows a rear view of a power tool having a first side handle and a second side handle, a protection device for protecting a first rechargeable battery and a second rechargeable battery according to a first embodiment, and an auxiliary handle;

[0019] Figure 6 shows a further rear perspective view of the power tool with the first and second rechargeable batteries in positions outside of the protective device according to the first embodiment;

[0020] Figure 7 shows a front perspective view of a power tool with a first rechargeable battery and a second rechargeable battery in position within a protective device according to a first embodiment;

[0021] Figure 8 shows a perspective view of a protection device according to a second embodiment having a first side module and a second side module;

[0022] Figure 9 A perspective view showing the front side of a first side module according to a second embodiment; and

[0023] Figure 10 A perspective view of the rear side of a second side module according to a second embodiment is shown. DETAILED DESCRIPTION

[0024] Figure 1 and Figure 2 The power tool 1 is shown in the form of a chipping hammer. However, the power tool 1 may also be a hammer drill, a combination hammer or the like.

[0025] The power tool 1 mainly comprises a tool housing 2 , a first side handle 9 a , a second side handle 9 b , a tool mounting device 4 , and a protection device 11 for protecting a first rechargeable battery 6 a and a second rechargeable battery 6 b .

[0026] The tool housing 2 contains mainly a driver, an impact mechanism, and a control device. The tool housing 2 has a first side 7a, a second side 7b, a bottom end 8a, and a top end 8b. The driver, impact mechanism, and control device are not shown in the drawings.

[0027] As from Figure 1 It is apparent that the working axis Z extends through the middle of the power tool.

[0028] A first side handle 9a is positioned on the first side 7a of the tool housing 2, whereas a second side handle 9b is positioned on the second side 7b of the tool housing 2. The two side handles 9a, 9b serve to hold and guide the power tool 1.

[0029] Likewise Figure 1 As shown, the side handle axis Y extends through the middle of the first side handle 9a and the second side handle 9b. The side handle axis Y and the working axis Z are substantially perpendicular to each other.

[0030] The tool mounting device 4 is positioned at the bottom end 8a of the tool housing 2. The tool mounting device 4 is used to releasably receive and hold a tool W. In this case, the tool W is configured as a chisel, Figure 3 .

[0031] The driver can be configured as an electric motor and connected to the impact mechanism so that the driver drives the impact mechanism to generate impact pulses. The impact mechanism is further connected to the tool assembly device 4 so that the impact pulses generated by the impact mechanism are transmitted to the tool W located in the tool assembly device 4.

[0032] Arranged at the top end portion 8b of the tool housing 2 are an interface device 10 and a protection device 11 for protecting the first and second rechargeable batteries 6a, 6b. Figure 4 and Figure 6 Specifically illustrated, the interface device 10 includes a first rechargeable battery connection point 12a and a second rechargeable battery connection point 12b. The first rechargeable battery connection point 12a allows the first rechargeable battery 6a to be releasably connected to the power tool 1, allowing the electrical energy stored in the first rechargeable battery 6a to be supplied to a load of the power tool 1. The second rechargeable battery connection point 12b allows the second rechargeable battery 6b to be releasably connected to the power tool 1, allowing the electrical energy stored in the second rechargeable battery 6b to be supplied to a load of the power tool 1. The load receiving the electrical energy may be a driver, a control device, or the like.

[0033] As from Figure 6 It is particularly obvious that the protection device 11 for protecting the first rechargeable battery 6a and the second rechargeable battery 6b comprises a first frame element 13a and a second frame element 13b. Figure 9 and Figure 10As specifically illustrated, both the first frame element 13a and the second frame element 13b are configured as a U-shaped bracket. In this case, the first frame element 13a and the second frame element 13b configured as a U-shaped bracket each include a top side 14, a bottom side 15, an inner side 16a, and an outer side 16b. The two frame elements 13a, 13b of the protective device 11, configured as a U-shaped bracket, form an interior volume IV defining the interior area of ​​the protective device 11. The protective device 11, primarily composed of the two frame elements 13a, 13b, includes a first opening 17a and a second opening 17b. The first rechargeable battery 6a can be introduced into the interior of the protective device through the first opening 17a, while the second rechargeable battery 6b can be introduced into the interior of the protective device through the second opening 17b, such that both rechargeable batteries 6a, 6b are located within the interior volume IV of the protective device 11. The protective device 11 is configured so that the first opening 17a and the second opening 17b face in opposite directions.

[0034] According to the first embodiment of the protection device 11, the lower sides 15 of the first frame element 13a and the second frame element 13b, which are configured as U-shaped brackets, are firmly connected to the top end portion 8b of the tool housing 2. In addition, the two frame elements 13a, 13b are not connected together at their respective top sides 14 and have a certain gap 18, as shown in FIG. Figure 2 、 Figure 4 、 Figure 6 and Figure 7 Because the two frame elements 13a, 13b are not connected together at their respective top sides 14 and the gap 18 between the two frame elements at the top sides 14 is configured in a continuous manner, the two frame elements 13a, 13b can move to a certain extent relative to each other at their top sides 14. The two frame elements 13a, 13b therefore exhibit a certain degree of flexibility.

[0035] According to an alternative embodiment of the protective device 11, not shown in the drawings, the two frame elements 13a, 13b can be connected together at the top sides 14 of the two frame elements by additional support struts or in the form of a continuous plate. In this case, the support struts or plates (not shown in the drawings) can be formed from a flexible or solid material. If the support struts or plates are formed from a flexible material, the two frame elements 13a, 13b can move relative to each other. However, if the support struts or plates are formed from a solid material, the two frame elements 13a, 13b cannot move relative to each other and form a stable structure.

[0036] As from Figure 6As is apparent, the first rechargeable battery connection point 12a and the second rechargeable battery connection point 12b are positioned within the protective device 11 or within the interior volume IV of the protective device 11. As is also apparent, the two rechargeable battery connection points 12a, 12b are oriented relative to one another such that the first rechargeable battery 6a and the second rechargeable battery 6b are introduced into the corresponding rechargeable battery connection points 12a, 12b in opposite directions. The first rechargeable battery 6a is introduced into the interior of the protective device 11 in direction A through the first opening 17a and then into the rechargeable battery connection point 12a, while the second rechargeable battery 6b is introduced into the interior of the protective device 11 in direction B through the second opening 17b and then into the rechargeable battery connection point 12b, with reference to FIG. Figures 4 to 7 In this case, the direction A extends substantially parallel to the side handle axis Y and perpendicular to the working axis Z.

[0037] Furthermore, according to the first embodiment of the protection device 11, the first supporting surface 19a, the second supporting surface 19b, the third supporting surface 19c and the fourth supporting surface 19d are provided on the top side 14 of the first frame element 13a and the second frame element 13b configured as a U-shaped bracket, with reference to Figure 4 、 Figure 6 and Figure 7 In this case, the first and second bearing surfaces 19a, 19b are positioned on the top side 14 of the first frame element 13a, while the third and fourth bearing surfaces 19c, 19d are positioned on the top side 14 of the second frame element 13b, with reference to Figure 4 and Figure 6 The four support surfaces 19a, 19b, 19c, 19d are configured in a planar manner and are arranged parallel to one another.

[0038] like Figure 5As shown, the protective device 11 has a certain length L in direction A and in direction B. In this case, the length L is between 350 mm and 450 mm. In the preferred embodiment, the length L is 400 mm. It should be noted that when the first rechargeable battery 6a is located in the first rechargeable battery connection point 12a and the second rechargeable battery 6b is located in the second rechargeable battery connection point 12b, the length L corresponds to at least the distance from the rear side RS of the first rechargeable battery 6a to the rear side RS of the second rechargeable battery 6b. It is also possible that when the first and second rechargeable batteries 6a, 6b have approximately the same housing length, the length L corresponds to at least twice the length of the housings of the first and second rechargeable batteries 6a, 6b. The defined value of the length L ensures that the first rechargeable battery 6a does not protrude laterally from the protective device 11 in direction B, and that the second rechargeable battery 6b does not protrude laterally from the protective device 11 in direction A. Because the two rechargeable batteries 6a, 6b do not protrude laterally from the protective device 11 due to the limited length L, the rechargeable batteries 6a, 6b will not come into contact with the base plate if the power tool 1 is dropped. If the power tool 1 is dropped, only the protective device 11 will come into contact with the base plate, and the rechargeable batteries 6a, 6b will not, thereby dissipating the sudden impact energy or shock pulse into the protective device 11.

[0039] As from Figure 7 As is apparent, the plane E extends through the four support surfaces 19 a, 19 b, 19 c, 19 d. In this case, the plane extends substantially parallel to the side handle axis Y and perpendicular to the working axis Z. The four support surfaces 19 a, 19 b, 19 c, 19 d serve to safely and stably lower the power tool 1 when the power tool 1 is positioned in an inverted manner (i.e., placed upside down) in order to remove the tool W from the tool mounting device 4.

[0040] The power tool 1 also includes an auxiliary handle 20. The auxiliary handle 20 is configured as a bow and includes a first end 20a, a second end 20b, and a gripping area 20c arranged between the first end 20a and the second end 20b. The auxiliary handle axis X extending through the auxiliary handle 20 is arranged substantially parallel to the side handle axis Y and / or perpendicular to the working axis Z. The power tool 1 can be gripped and guided with the aid of the auxiliary handle 20. In the present exemplary embodiment, the auxiliary handle 20 is positioned on the protective device 11. To this end, the first end 20a and the second end 20b of the auxiliary handle 20, which is configured as a bow, are fastened to the first frame element 13a.

[0041] Figures 8 to 10A protective device 11 according to a second embodiment is shown. The protective device 11 according to the first embodiment is configured in a similar manner to the protective device 11 according to the second embodiment. The configuration of the protective device 11 according to the first embodiment differs from the configuration of the protective device 11 according to the second embodiment primarily in that the first frame element 13a and the second frame element 13b are releasably connected to one another at the top side 14. For the releasable connection of the first frame element 13a and the second frame element 13b, a screw connection is used. As can be seen from Figure 9 and Figure 10 As is apparent from each of the drawings, both the first frame element 13a and the second frame element 13b each include a first screw cap 21a and a second screw cap 21b. The screws are not shown in the figures. Furthermore, the first frame element 13a and the second frame element 13b are releasably connected to one another at the top side 14 by means of a plug-type connection 22. For this purpose, the first frame element 13a and the second frame element 13b each include a first plug-type element 22a and a second plug-type element 22b, resulting in the first frame element 13a and the second frame element 13b being releasably connected to one another.

[0042] List of Reference Numerals

[0043] 1 Power Tools

[0044] 2 Tool housing

[0045] 4 Tool assembly device

[0046] 6a First Rechargeable Battery

[0047] 6b Second rechargeable battery

[0048] 7a First side

[0049] 7b Second side

[0050] 8a Bottom end of tool housing

[0051] 8b Top end of tool housing

[0052] 9a First side handle

[0053] 9b Second side handle

[0054] 10 Interface device

[0055] 11 Protecting Equipment

[0056] 12a First rechargeable battery connection point

[0057] 12b Second rechargeable battery connection point

[0058] 13a First frame element

[0059] 13b Second frame element

[0060] 14 Top side of first / second frame element

[0061] 15 Underside of first / second frame element

[0062] 16a Inner side of first / second frame element

[0063] 16b Outer side of first / second frame element

[0064] 17a First opening in the protective device

[0065] 17b Second opening in the protective device

[0066] 18 Gap at top side of first / second frame element

[0067] 19a First supporting surface

[0068] 19b Second supporting surface

[0069] 19c Third supporting surface

[0070] 19d Fourth supporting surface

[0071] 20 Auxiliary handle

[0072] 21a First screw cover

[0073] 21b Second screw cover

[0074] 22 Plug connector

[0075] 22a First plug-in element

[0076] 22b Second plug-in element

[0077] E plane passing through the supporting surface

[0078] W Tool

[0079] X Auxiliary handle axis

[0080] Y side handle axis

[0081] Z work axis

Claims

1. A power tool (1), comprising a first side handle and a second side handle (9a, 9b) and a tool housing (2), the tool housing having an interface device (10) for releasably receiving and retaining a first rechargeable battery and a second rechargeable battery (6a, 6b), wherein: A side handle axis (Y) extending through the first and second side handles (9a, 9b) is arranged substantially perpendicular to a working axis (Z) extending through the tool housing, The power tool comprises a protective device (11) for protecting the first rechargeable battery and the second rechargeable battery, wherein the protective device (11) has an internal volume for at least partially receiving the first rechargeable battery and the second rechargeable battery. Characterized in that the protection device (11) comprises a first frame element (13a) and a second frame element (13b), wherein the first frame element and the second frame element (13a, 13b) each comprise a top side (14) and a bottom side (15), and wherein the first frame element and the second frame element (13a, 13b) are releasably connectable to each other at the respective top side (14) and the first frame element and the second frame element (13a, 13b) are releasably connectable to the tool housing ( 2), wherein the first frame element and the second frame element (13a, 13b) form a first opening (17a) and a second opening (17b) when connected to the tool housing (2), wherein the protective device (11) is configured so that the first rechargeable battery (6a) is introduced through the first opening (17a) in a first direction (A) and mounted to the interface device (10) and the second rechargeable battery (6b) is introduced through the second opening (17b) in a second direction (B) opposite to the first direction (A) and mounted to the interface device (10).

2. The power tool (1) according to claim 1, It is characterized by: The protection device (11) has a length (L) between 350 mm and 450 mm in the first direction and the second direction (A, B) substantially parallel to the side handle axis (Y).

3. The power tool (1) according to claim 2, It is characterized by: The length (L) is 400 mm.

4. The power tool (1) according to any one of claims 1 to 3, It is characterized by: The protection device (11) comprises at least one supporting surface (19a, 19b, 19c, 19d), wherein a plane (E) extending through the at least one supporting surface (19a, 19b, 19c, 19d) is arranged substantially parallel to the side handle axis (Y) and / or perpendicular to the working axis (Z).

5. The power tool (1) according to any one of claims 1 to 3, It is characterized in that At least one auxiliary handle (20) is included on the tool housing (2), wherein the at least one auxiliary handle (20) is arranged on the tool housing (2) so that an auxiliary handle axis (X) extending through the at least one auxiliary handle (20) is arranged substantially parallel to the side handle axis (Y) and / or perpendicular to the working axis (Z).

6. The power tool (1) according to any one of claims 1 to 3, It is characterized in that The power tool (1) is a chipping hammer.

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