Handheld power tool with rechargeable battery protection

Abstract

The present invention relates to a handheld electric power tool having a housing-integrated handle, through which a handle axis extends, and a receiving compartment for receiving a rechargeable battery pack is arranged on the handle end of the housing-integrated handle, wherein the receiving compartment is installed in the handle end so as to be movable along the handle axis.

Description

Technical Field

[0001] The present invention relates to a handheld electric power tool having a housing-integrated handle, through which the handle axis extends. A receiving compartment for a rechargeable battery pack is arranged at the handle end of the handle. The rechargeable battery pack is used to power the handheld electric power tool. Background Art

[0002] Hand-held electric power tools of the type mentioned at the outset are in principle known from the prior art.Rechargeable battery protection devices are also known, such as elastically formed rechargeable battery housings or corner protectors for rechargeable battery packs. Summary of the Invention

[0003] It is an object of the present invention to specify a handheld electric power tool that facilitates the fundamentals of rechargeable battery protection in conjunction with the relatively compact size or proportions of the handheld power tool.

[0004] To this end, the present invention proposes a handheld electric power tool, which has a housing-integrated handle, through which the handle axis extends, and a receiving compartment for receiving a rechargeable battery pack is arranged on the handle end of the housing-integrated handle, the receiving compartment being installed in the handle end so as to be movable along the handle axis, the receiving compartment having a guide sleeve, and the handheld electric power tool having a compression spring, which is arranged coaxially with the guide sleeve.

[0005] This object is achieved in that the receiving compartment is mounted in the handle end so as to be displaceable along the handle axis.

[0006] The present invention encompasses the discovery that previously known rechargeable battery protection devices typically require a relatively large volume for the handheld electric power tool, or at least for the rechargeable battery pack. Thus, such rechargeable battery packs are indeed safe from shocks. However, comfortable working in tight workspaces is often hindered. This is avoided in the handheld electric power tool according to the present invention by relocating at least a portion of the rechargeable battery protection device to the handle end of the handheld electric power tool.

[0007] It has been found to be advantageous if the hand-held electric power tool has at least one spring element and / or at least one damper element, which act between the handle end and the receiving compartment.

[0008] In a particularly preferred embodiment, the receiving compartment includes a guide sleeve. It has been found advantageous if at least some portions of the guide sleeve are arranged in a guide channel formed in the handle end. In a particularly preferred embodiment, a plurality of ribs are arranged around the entire guide sleeve. In a further preferred embodiment, the ribs are designed to be elastically deflectable radially outward and / or inward. It has been found advantageous if the ribs tilt radially outward as the distance from the receiving compartment increases. In a further preferred embodiment, the guide channel tapers along the handle axis and away from the receiving compartment. This preferably allows the ribs to elastically deform radially inward if the receiving compartment and the handle end are brought closer together. The receiving compartment and the handle end typically come closer together when the handheld electric power tool is dropped onto the rechargeable battery pack. The tapered portion can be dome-shaped, or portions of the tapered portion can be dome-shaped. Preferably, the tapered portion abuts a substantially cylindrical portion of the guide channel.

[0009] It has been found to be advantageous that the ribs are formed as a single piece with the receiving compartment. Alternatively, the ribs can be provided as components distinct from the receiving compartment. In a particularly preferred embodiment, the ribs and / or the receiving compartment are made of plastic.

[0010] In a further preferred embodiment, the ribs each have a retaining edge, wherein the retaining edge preferably limits the movement of the receiving compartment relative to the handle end. It has been found to be advantageous if the retaining edge together with the projection of the guide channel creates at least a one-sided form-fit connection in the direction of the handle axis.

[0011] In a particularly preferred embodiment, the handheld electric power tool includes a compression spring. It has been found to be advantageous if the compression spring is arranged coaxially with the guide sleeve. Furthermore, it has been found to be advantageous if the compression spring is arranged such that it is compressed along the handle axis when the receiving compartment and the handle end are brought closer together, for example, due to an impact. The compression spring can be identical to at least one spring element of the handheld electric power tool. It has been found to be advantageous if both the elastically deformable rib and the compression spring contribute to drop cushioning and / or drop damping.

[0012] In a particularly preferred embodiment, the handheld electric power tool is equipped with an elastically deformable sealing sleeve, which is preferably arranged along the transition between the handle end and the receiving compartment. The sealing sleeve can bear against the projection and / or against the receiving compartment. It has proven advantageous if the sealing sleeve acts as a damper along the handle axis. The sealing sleeve can be identical to at least one damper element of the handheld electric power tool.

[0013] In a further preferred embodiment, the handheld electric power tool is designed as a drill. It has been found to be advantageous if the handheld electric power tool has a rechargeable battery pack which is received or is to be received in the receiving compartment.

[0014] 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 features in combination. Those skilled in the art will readily consider these features individually and combine them to form other useful combinations. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In the accompanying drawings, the same and similar parts are represented by the same reference numerals. In the accompanying drawings:

[0016] Figure 1 A first exemplary embodiment of a handheld electric power tool is shown;

[0017] Figure 2 shows a cross-sectional view of a receiving compartment for receiving a rechargeable battery pack;

[0018] Figure 3 The receiving compartment is shown in perspective; and

[0019] Figure 4 Shown in detail Figure 1 An exemplary embodiment of . DETAILED DESCRIPTION

[0020] Figure 1 A preferred exemplary embodiment of a handheld electric power tool 100 is shown in FIG. Figure 1 As can be seen in the figure, the handheld electric power tool 100 is designed as a drilling machine by way of example. The handheld electric power tool 100 is equipped with a housing-integrated handle 10, through which the handle axis GA extends. During operation, the handle 10 is grasped by the user in order to hold the handheld electric power tool 100 in this way, for example with one hand. A receiving compartment 20 for receiving a rechargeable battery pack 80 is arranged on the handle end 11 of the handle 10. According to the invention, the receiving compartment 20 is mounted in the handle end 11 so as to be movable along the handle axis GA. This movement is Figure 2 Indicated by a double arrow BR oriented parallel to the handle axis GA.

[0021] The receiving chamber 20 has a guide sleeve 25 (refer to Figure 2 ), at least some parts of the guide sleeve are arranged in the guide channel 15 formed in the handle end 11. A plurality of ribs 27 are arranged around the entire guide sleeve 25 (see also Figure 2 ), the plurality of ribs are designed to be elastically deflectable outwardly and inwardly in the radial direction RR. Figure 2 It can be clearly seen that these ribs 27 increase with distance from the receiving compartment 20 (at Figure 2 In the radial direction RR, the ribs 27 are inclined outwards. In other words, the circumference of the rib 27 at the transition to the battery pack receiving compartment 20 is smaller than the circumference at the free end of the rib 27. In order to mount the receiving compartment 20 on the handle end 11, the ribs 27 are pressed inwards in the radial direction RR by hand or by a machine and inserted into the guide channel 15. The ribs 27 each have a retaining edge 29. The retaining edge 29 limits the movement of the receiving compartment 20 relative to the handle end 11. More precisely, the retaining edge 29, together with the protrusion 17 of the guide channel 15, produces a one-sided form-fit connection along the handle axis GA in the downward direction. In other words, in Figure 2 In the process, the receiving compartment 20 will not fall out downwards from the handle end 11.

[0022] As from Figure 2 As can also be seen in the handheld electric power tool 100, a compression spring 30 is arranged coaxially with the guide sleeve 25. This compression spring 30 can be used to dampen the impact force FS generated by the rechargeable battery pack 80 arranged in the receiving compartment 20. Here, the guide sleeve 25 engages further upward in the direction of the handle axis GA into the guide channel 15. The downward locking of the compression spring 30 is achieved by the already described form-fit connection between the retaining edge 29 of the rib 27 and the projection 17 of the guide channel 15.

[0023] The handheld electric power tool 100 also has an elastically deformable sealing sleeve 40, which is arranged along the transition between the handle end 11 and the receiving compartment 20. The sealing sleeve 40 encloses the handle end 11, preventing dirt or moisture from entering the guide channel 15. The sealing sleeve 40 rests against the projection 17 and the receiving compartment 20. By way of example, the sealing sleeve 40 is composed of an elastomer, which acts as a damper along the handle axis GA. In other words, in the event of an impact on the rechargeable battery pack 80, the sealing sleeve 40 is compressed from below.

[0024] Figure 3 , a perspective view of the receiving compartment 20 is shown. Clearly visible is the guide sleeve 25 protruding from the receiving compartment 20 and surrounded by six ribs 27. The ribs 27 are arranged evenly spaced apart around the guide sleeve 25. The ribs 27 are designed to be elastically deflectable inwardly and outwardly in the radial direction RR and to tilt outwardly in the radial direction RR. In the exemplary embodiment shown here, the ribs 27 are formed as a single piece with the receiving compartment and are made of plastic.

[0025] Now refer to Figure 4The spring action of the rib 27 will be further explained. Figure 4 yes Figure 1 Detailed illustration. The essentially cylindrical guide channel 15 formed in the handle end 11 has a tapered portion 19 in the direction of the handle axis GA (this means an upward direction away from the receiving compartment 20), along which the corresponding retaining edge 29 of the rib 27 can slide. If the receiving compartment 20 approaches the handle end 11 due to an impact force FS applied to the rechargeable battery pack 80, then with the help of this tapered portion 19, the rib 27 is elastically deformed inwardly in the radial direction RR toward the handle axis GA. The elastic deformation of the rib 27 in the inward direction allows a portion of the impact force FS to be buffered. Another portion of the impact force is buffered by the compression spring 30. The spring action of the rib 27 and the spring action of the compression spring 30 act synergistically.

[0026] List of Reference Numerals

[0027] 10 handles

[0028] 11 Handle end

[0029] 15 Guide Channel

[0030] 17 protrusion

[0031] 19 tapered portion

[0032] 20 Receiving Module

[0033] 25 guide sleeve

[0034] 27 ribs

[0035] 29 Keep an Edge

[0036] 30 Compression spring

[0037] 40 Sealing sleeve

[0038] 80 Rechargeable Battery Pack

[0039] 90 shell

[0040] 100 Handheld Electric Power Tools

[0041] The direction of movement of the BR receiving compartment relative to the handle

[0042] GA handle axis

[0043] RA Rotation axis

[0044] RR radial direction

Claims

1. A handheld electric power tool (100) comprising a housing-integrated handle (10), a handle axis (GA) extending through the housing-integrated handle, and a receiving compartment (20) for receiving a rechargeable battery pack (80) arranged on a handle end (11) of the housing-integrated handle, It is characterized in that The receiving chamber (20) is mounted in the handle end (11) so as to be movable along the handle axis (GA), the receiving chamber (20) having a guide sleeve (25), and the handheld electric power tool (100) having a compression spring (30) coaxially arranged with the guide sleeve (25).

2. The handheld electric power tool (100) according to claim 1, It is characterized in that The compression spring acts between the handle end (11) and the receiving compartment (20).

3. The handheld electric power tool (100) according to claim 1, It is characterized in that At least some portion of the guide sleeve is disposed in a guide channel (15) formed in the handle end (11).

4. The handheld electric power tool (100) according to claim 3, It is characterized in that A plurality of ribs (27) are arranged around the entire guide sleeve (25) and are designed to be elastically deflectable outwardly and / or inwardly in a radial direction (RR).

5. The handheld electric power tool (100) according to claim 4, It is characterized in that The ribs (27) are inclined outwardly in the radial direction (RR) as the distance from the receiving compartment (20) increases.

6. The handheld electric power tool (100) according to claim 4 or 5, It is characterized in that The guide channel (15) tapers along the handle axis (GA) and in a direction away from the receiving compartment (20), with the result that the ribs (27) are elastically deformed inwards in the radial direction (RR) when the receiving compartment (20) and the handle end (11) approach one another.

7. The handheld electric power tool (100) according to claim 4 or 5, It is characterized in that The ribs (27) each have a retaining edge (29), wherein the retaining edge (29) limits the movement of the receiving compartment (20) relative to the handle end (11).

8. The handheld electric power tool (100) according to any one of claims 1 to 5, It is characterized in that The handheld power tool (100) has an elastically deformable sealing sleeve (40), which is arranged along a transition portion between the handle end (11) and the receiving chamber (20).

9. The handheld electric power tool (100) according to claim 8, It is characterized in that The sealing sleeve (40) acts as a damper along the handle axis (GA).

10. The handheld electric power tool (100) according to any one of claims 1 to 5, It is characterized in that The handheld electric power tool (100) is designed as a drill.

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