CN117773849A - Hand-held power tool with positioning support - Google Patents

Abstract

A hand-held power tool (100), in particular a screwdriver, comprising: -an elongated housing (110) in which at least one drive motor (140) for rotating the drive tool receiving means (120), a battery (150) for powering the drive motor (140) independently of the power grid and associated control electronics (220) are arranged; and a positioning bracket (200) forming an inner space (205, 206) for positioning the drive motor (140), the battery (150) and associated control electronics (220) in the elongated housing (110). The positioning support (200) has a first positioning section (208) for positioning the drive motor (140) and a second positioning section (209) for positioning the associated control electronics (220) and the battery (150), wherein the first and second positioning sections (208, 209) have different cross sections.

Description

Hand-held power tool with positioning support

Technical Field

The invention relates to a hand-held power tool, in particular a screwdriver, comprising: an elongated housing in which at least one drive motor for rotating the drive tool receiving means, a battery for powering the drive motor independently of the power grid and associated control electronics are arranged; and a positioning bracket forming an interior space for positioning the drive motor, battery and associated control electronics in the elongated housing.

Background

Such a hand-held power tool formed as a rod-shaped screwdriver is known from the prior art. The rod-shaped screwdriver has an elongated housing in which a drive motor for driving a plug-in tool that can be arranged in a tool receiving device is arranged. A positioning bracket for positioning the drive motor, the battery and the control electronics in the elongated housing is arranged in the inner space of the housing.

Disclosure of Invention

The invention relates to a hand-held power tool, in particular a screwdriver, comprising: an elongated housing in which at least one drive motor for rotating the drive tool receiving means, a battery for powering the drive motor independently of the power grid and associated control electronics are arranged; and a positioning bracket forming an interior space for positioning the drive motor, battery and associated control electronics in the elongated housing. The positioning bracket has a first positioning section for positioning the drive motor and a second positioning section for positioning the associated control electronics and battery, wherein the first and second positioning sections have different cross sections.

The invention can therefore provide a hand-held power tool having an elongate housing, wherein the positioning support can be reliably and rotationally locked relative to the elongate housing by means of different cross sections of the first and the second positioning section.

Preferably, the first positioning section is formed as a hollow cylinder and the second positioning section is formed as a hollow cuboid.

Thereby, a suitable cross section can be provided in a simple manner in order to form the anti-twist device in the housing.

Preferably, the positioning bracket has a first positioning tab for positioning the associated control electronics and a second positioning tab for positioning the battery along the longitudinal extension of the elongate housing, wherein the two positioning tabs are arranged substantially parallel to each other and are decoupled from each other by the recess.

The control electronics can thus be supported decoupled from the battery in a simple and easy manner.

According to one embodiment, the positioning bracket has two complementary half-shells which are connected to one another by a locking connection, wherein each half-shell has a first and a second positioning tab, respectively.

Thereby, the drive motor, the battery and the control electronics can be simply arranged in the positioning bracket.

Preferably, the second positioning section has said first and second positioning tabs.

Thereby, the two half-shells can be connected in a simple manner.

Preferably, the second positioning section has at least two holding sections, which form a positioning receiving means for the associated control electronics.

Thereby, a safe and stable arrangement of the control electronics can be achieved.

Preferably, the second positioning section has at least one positioning tab which surrounds the battery at least in sections for positioning.

Thus, the battery can be positioned simply and reliably.

According to one embodiment, the first positioning section has a ventilation groove.

Therefore, overheat of the drive motor can be simply prevented.

Preferably, the positioning bracket has at least one positioning receiving means on its outer periphery arranged along the longitudinal extension of the elongated housing for receiving at least one positioning tab provided to the at least one positioning receiving means and formed on the inner side of the elongated housing.

Thus, a rotationally fixed arrangement of the positioning bracket in the elongate housing can be achieved easily and simply.

Preferably, the positioning bracket has a connecting strut arranged transversely to the longitudinal extension of the elongate housing, which connecting strut is formed for axially fixing the battery in the associated receiving means of the positioning bracket.

Thus, a stable arrangement of the battery in the positioning bracket can be achieved in a simple manner.

The positioning bracket is preferably screwed onto the elongated housing by at least one screw dome or dome screw (Schraubdom) for axial fixation.

Thereby, a secure and stable connection between the positioning bracket and the elongated housing can be achieved.

Preferably, said at least one screw dome forms a clamping connection with a receiving means assigned to the associated control electronics.

Thereby, the connection between the screw dome and the control electronics can be achieved in a simple manner.

According to one embodiment, the positioning bracket has at least one cable retention section on its outer periphery.

Thus, a safe and reliable cable holding device can be provided, thereby preventing the cable from being caught during the assembly process.

Drawings

The invention will be described in more detail below with reference to embodiments in the accompanying drawings. In the accompanying drawings:

fig. 1 shows a side view of a hand-held power tool according to the invention, with an exemplary positioning bracket;

fig. 2 shows a partial exploded view of the hand-held power tool of fig. 1;

FIG. 3 shows a perspective exploded view of the positioning bracket of FIGS. 1 and 2;

fig. 4 shows a perspective side view of the positioning bracket of fig. 1-3;

fig. 5 shows a perspective view of the positioning bracket of fig. 1 to 4 from the underside;

fig. 6 shows a cross-sectional view of the hand-held power tool of fig. 1 and 2;

fig. 7 shows a cross-sectional view of the hand-held power tool of fig. 1 and 2 in a further cut-away position;

fig. 8 shows a perspective view of a section of the hand-held power tool of fig. 1 and 2, with the housing partially shown in perspective; and

fig. 9 shows an enlarged section of the positioning bracket of fig. 1 to 8.

Detailed Description

In the drawings, elements having the same or similar functions are provided with the same reference numerals and are described in detail only once.

Fig. 1 shows an exemplary hand-held power tool 100, which has an elongated housing 110, for example. By virtue of the elongated housing 110, the hand power tool 100 is formed, for example, in the shape of a so-called "stick". The hand-held power tool 100 is preferably formed as a screwdriver, in particular as a rod-shaped screwdriver. According to one embodiment, the hand-held power tool 100 can be mechanically and electrically connected to an energy supply unit in order to achieve a grid-independent power supply. The energy supply unit is preferably formed as a battery or battery pack 150. Preferably, the battery 150 is fixedly disposed in the housing 110.

Preferably, at least one drive motor 140 for driving the tool receiving device 120 is arranged in the elongate housing 110. Illustratively, the tool receiving device 120 has a receiving device 125 for receiving a plug-in tool. The receiving device 125 can form a hexagon socket for a screwdriver bit or a bit-plug tool.

The elongate housing 110 preferably has a cylindrical, exemplary at least partially sleeve-shaped base body with a first axial end 101 and an opposite second axial end 102, wherein the tool receiving device 120 is exemplary arranged in the region of the first axial end 101. Illustratively, the longitudinal direction 105 of the elongate housing 110 is formed between the first and second axial ends 101, 102.

In the hand-held power tool 100 shown in fig. 1, the tool receiver 120, the drive motor 140 and the housing 110 with the gripping region are arranged along a common longitudinal axis, which preferably coincides with the rotational axis 103 of the tool receiver 120. Preferably, all elements of the hand-held power tool 100 are arranged in the elongate housing 110. In contrast to hand-held power tools, in which the battery is arranged perpendicular to the pistol-shaped housing of the drive motor, which is known from the prior art, the battery 150 is therefore also preferably arranged in the housing 110 of the hand-held power tool 100.

According to one embodiment, the drive motor 140 is provided with a transmission 145. The transmission 145 is preferably formed as a planetary gear. In addition, a sliding switch 170 is preferably provided, which is arranged on the housing 110 for activating the reverse operation of the drive motor 140. Also, the housing 110 preferably has an optional torque adjustment sleeve 130 on its axial end 101 for adjusting the associated, optional torque coupling.

Illustratively, the tool receiving device 120 has an axial longitudinal extension 109. It is noted that in the context of the present invention, the term "axial" is understood as a direction along the longitudinal extension 109 of the tool receiving means 120. Furthermore, the term "radial" is understood to be a direction substantially perpendicular to the longitudinal extension 109 of the tool receiving device 120. Thus, the radial direction 108 is substantially perpendicular to the longitudinal direction 105 of the elongated housing 110 or to the longitudinal extension 109 of the tool receiving device 120. Furthermore, the axial direction is substantially parallel to the longitudinal extension 109 of the tool receiving means 120 or to the rotational axis 103 of the tool receiving means 120.

According to one embodiment, an activation unit 175 is provided for activating the drive motor 140. Illustratively, the activation unit 175 is axially disposed between the optional torque adjustment sleeve 130 and the slide switch 170.

Furthermore, according to the invention, a positioning bracket 200 is provided, which is formed for positioning the drive motor 140, the battery 150 and the associated control electronics (220 in fig. 2) in said elongated housing 110.

Fig. 2 shows the hand-held power tool 100 of fig. 1. Here, fig. 2 shows the positioning bracket 200 in fig. 1. The positioning bracket 200 preferably forms an interior space 205, 206 on its inner side facing the drive motor 140 and the battery 150 for positioning the drive motor 140, the battery 150 and the associated control electronics 220 in the elongated housing 110. Illustratively, the battery 150 has a circular cross-section. Further, the control electronics 220 are exemplarily arranged on an upper side of the battery 150 facing the control electronics 220.

Preferably, the drive motor 140 is disposed in a first positioning section 208 of the positioning bracket 200, and the battery 150 and associated control electronics 220 are disposed in a second positioning section 209 of the positioning bracket 200. The two positioning sections 208 and 209 are preferably arranged axially one after the other.

According to one embodiment, the inner space 205 is configured for a first positioning section 208 and the inner space 206 is configured for a second positioning section 209. In this case, the two positioning sections 208 and 209 are preferably connected to one another.

According to the invention, the two positioning sections 208, 209 have different cross sections. Preferably, the first positioning section 208 is formed in the form of a hollow cylinder, and the second positioning section 209 is formed in the form of a hollow cuboid. It is noted that the second positioning section 209 may also have a different shape, preferably an angular shape, such as a triangle or other polygon. Furthermore, the first positioning section 208 may also have any other shape, in particular a corner-free shape, such as an oval shape.

According to one embodiment, the positioning bracket 200 includes two complementarily formed half shells 230, 250. In the assembled state, the two half-shells 230, 250 form two positioning sections 208, 209 and inner spaces 205, 206. The two half-shells 230, 250 are preferably connected to each other by a locking connection (411-414 in fig. 4;511, 512 in fig. 5). For this purpose, the locking elements 231, 232, 245, 246, 251, 252, 256, 265, 266 are shown by way of example in fig. 2. The locking elements 231, 232, 251, 252 are arranged in the first positioning section 208, while the locking elements 245, 246, 256, 265, 266 are assigned to the second positioning section 209. The locking elements 245, 246 are preferably formed as locking receptacles, and the locking elements 265, 266 are preferably formed as locking hooks.

Preferably, the first positioning section 208 has two radially formed holding sections 278, 279 in its inner space 205 or on its inner circumference facing the drive motor 140. The retention sections 278, 279 illustratively form axial stops for the drive motor 140. Here, the holding section 278 is arranged facing the tool receiving device 120 or on an exemplary left end of the drive motor 140, and the holding section 279 is arranged on an end of the first positioning section 208 facing the second positioning section 209.

Furthermore, the first positioning section 208 preferably comprises ventilation grooves 233, 253 for cooling the drive motor 140. Furthermore, the positioning bracket 200 preferably comprises at least one cable holding section 249 on its outer circumference 207 facing the housing 110 and facing away from the battery 150 for fixedly holding at least one cable 215.

Preferably, the positioning bracket 200 includes first positioning tabs 235, 255 along the longitudinal extension 105 of the elongate housing 110 for positioning the associated control electronics 220. In addition, the positioning bracket 200 preferably further has second positioning pieces 241, 261 for positioning the battery 150. Here, the two positioning tabs 235, 255, 241, 261 are illustratively arranged substantially parallel to each other. In addition, tabs 235, 255, 241, 261 are preferably decoupled from one another by elongated recess 248. Here, an exemplary slot-like recess 248 is arranged between the tabs 235, 241 of the half-shell 230, and similarly, a recess 248 is also arranged between the tabs 255, 261 of the half-shell 250.

Preferably, each half shell 230, 250 includes first and second splines 235, 255, 241, 261, respectively. Preferably, the second locator section 209 includes the first and second locator tabs 235, 255, 241, 261.

According to one embodiment, the second positioning section 209 includes at least two holding sections 236, 237, 238, 239, 256, 257, 258, 259. The exemplary eight holding sections 236, 237, 238, 239, 256, 257, 258, 259 preferably form a positioning receiver 240, 260 for the associated control electronics 220. In this case, the holding sections 236, 237, 238, 239 are preferably assigned to the half-shell 230, while the holding sections 256, 257, 258, 259 are assigned to the half-shell 250. Preferably, one holding section 236, 238, 256, 258 forms an exemplary upper boundary of the positioning receiver 240, 260, respectively, while the holding section 237, 239, 257, 259 forms an exemplary lower boundary of the positioning receiver 240, 260. In this case, the exemplary upper boundary holding sections 236, 238, 256, 258 are each arranged axially next to one of the exemplary lower boundary holding sections 237, 239, 257, 259.

It is noted that the arrangement of the holding sections 236, 237, 238, 239, 256, 257, 258, 259 is exemplary only and should not be considered as limiting the invention. Thus, the holding sections 236, 238, 256, 258 may also form an exemplary lower boundary of the positioning receiver 240, 260, and the holding sections 237, 239, 257, 259 may form an exemplary upper boundary of the positioning receiver 240, 260.

In addition, the second positioning section 209 preferably includes at least one positioning tab 242, 243, 244, 262, 263, 264 that at least partially encloses the battery 150 for positioning. The splines 242, 243, 244 are preferably configured to the half shell 230, while the splines 262, 263, 264 are preferably configured to the half shell 250. Here, the splines 242, 262 are arranged axially facing the first positioning section 208, while the splines 244, 264 are arranged facing the second axial end 102 in fig. 1. Furthermore, the positioning tabs 243, 263 are preferably arranged axially between the positioning sections 242, 244, 262, 264.

Preferably, the positioning bracket 200 comprises at least one positioning receiver 272, 273 arranged along the longitudinal extension 105 of the elongated housing 110 on its outer periphery 207 facing the housing 110. Preferably, the positioning receiver 272, 273 is formed to receive at least one positioning tab 212, 214 provided to the positioning receiver 272, 273 and formed on the inner side 210 of the elongated housing 110 facing the driving motor 140 or the battery 150. End caps, not shown, are preferably screwed onto the splines 212, 214 to close the housing 100. Preferably, each half-shell 230, 250 has one of said positioning receptacles 272, 273, respectively. The positioning receptacles 272, 273 are arranged axially in sequence.

Preferably, the positioning bracket 200 comprises connecting struts 291, 293 arranged transversely to the longitudinal extension 105 of the elongate housing 110, which connecting struts are formed for axially fixing the battery 150 in the associated receiving means 206 of the positioning bracket 200. Here, the connection struts 291 are assigned to the half-shell 250, while the connection struts 293 are assigned to the half-shell 230. Furthermore, the positioning bracket 200 preferably has further stabilizing struts 292, 294 parallel to the connecting struts 291, 293, by means of which the two half-shells 230, 250 can be connected to one another.

Preferably, the second positioning section 209 has a radially inwardly formed widening tab 275 on its side facing the first positioning section 208, which widening tab is formed for axially fixing the battery 150 in the direction of the drive motor 140.

Furthermore, the positioning bracket 200 is preferably screwed to the elongated housing 110 for axial fixation by at least one (in the example two) screw domes 234, 254. Illustratively, a spiral dome 234 is configured to the half-shell 230 and a spiral dome 254 is configured to the half-shell 250. Preferably, each screw dome 234, 254 forms a clamping connection (621 in fig. 6) with the receiving means 221, 222 assigned to the associated control electronics 220. The receiving means 221, 222 are preferably arranged on the side of the control electronics 220. In addition, the elongate housing 110 preferably has anchor tabs 282, 283 on its inner side 210 for threaded engagement with the screw domes 234, 254 of the positioning bracket 200. Preferably, the screw domes 234, 254 are arranged in the region of the grip region 115, so that a threaded connection can be made through the recesses of the grip region 115.

Furthermore, an exemplary slot-like recess 248 is preferably formed from the respective helical dome 234, 254 to the free end of the positioning bracket 200 facing away from the drive motor 140. Preferably, the splines 242, 243, 244, 262, 263, 264 are here arranged to be axially decoupled from the recess 248.

When assembled, the positioning bracket 200 is arranged around the drive motor 140 and the battery 150 with the control electronics 220, and the two half-shells 230, 250 are connected to each other by a locking connection. Then, starting from the second axial end 102 of fig. 1, the housing 110 is pushed onto the positioning bracket 200 in the direction of arrow 201. In this case, a clamping connection is formed between the housing 110 and the positioning bracket 200. Finally, the housing 110 and the positioning bracket 200 are screwed to each other at the screw domes 234, 254.

Fig. 3 shows the positioning bracket 200 of fig. 1 and 2, and shows a preferably slot-shaped recess 248 for decoupling the positioning tabs 235, 255, 241, 261. Fig. 3 furthermore shows the locking elements 231, 232, 245, 246, 251, 252, 256, 265, 266 and the further locking elements 311, 312, 313, 314. The locking elements 311-314 are preferably arranged axially between the locking elements 251, 266, 252, 265, 231, 246, 233, 245. In particular, the locking elements 311, 312, 313, 314 are arranged axially between the widening piece 275 and the holding section 279.

Fig. 4 shows the positioning bracket 200 of fig. 1 to 3, in which fig. 4 the two half-shells 230, 250 are connected to one another by a locking connection. Here, fig. 4 shows locking connections 411-414. Here, the locking element 231 of the exemplary left side of the half-shell 230 and the locking element 251 of the half-shell 250 form a locking connection 411. Furthermore, the locking elements 313, 314 preferably form a locking connection 412. Furthermore, the locking elements 246, 256 preferably form a locking connection 413 and the locking elements 245, 265 form a locking connection 414.

Fig. 5 shows the positioning frame 200 in fig. 4 viewed from the underside. Here, fig. 5 shows a locking connection 511 formed by the locking elements 233, 253 and a locking connection 512 formed by the locking elements 311, 312.

Further, fig. 5 shows a holding section 278. Illustratively forming radially opposed retention sections 278. The holding section 278 is formed here as a radial piece, which is formed radially inward from the outer circumference 207 or toward the rotation axis 103 of fig. 1.

Fig. 6 shows the positioning bracket 200 of fig. 1 to 5 arranged in the elongated housing 110 with the battery 150 and the control electronics 220 arranged in the inner space 206. Fig. 6 shows a clamping connection 621 between the screw domes 234, 254 and the receiving devices 221, 222 assigned to the control electronics 220.

Further, fig. 6 shows an exemplary threaded connection 621 formed between the positioning bracket 200 and the elongated housing 110. Here, each screw element 611 connects the screw dome 234, 254 with a fixing piece 282, 283 arranged on the inner side 210 of the housing 110. Two threaded connections 621 are shown by way of example, wherein one threaded connection 621 is assigned to each half-shell 230, 250. Fig. 6 also shows the arrangement of the securing tabs 282, 283 on the axial end of the recess 248 facing the drive motor 140. The fixing pieces 282, 283 move inside the recess 248 when the positioning bracket 200 is pushed into the elongated housing 110.

Also, fig. 6 shows the configuration of the positioning pieces 242, 243, 244, 262, 263, 264 by the positioning pieces 244, 264. Preferably, the tabs 244, 264 are formed such that they at least partially surround the battery 150 on the outer periphery of the battery facing the elongate housing 110. Preferably, the splines 244, 264 have a receiving geometry that is configured to the battery 150. In particular, it is preferable that about 75% of the outer circumference of the battery 150 is surrounded.

Fig. 7 shows the positioning bracket 200 of fig. 6 disposed in the elongated housing 110. Here, the fixing pieces 282, 283 are arranged in the recess 248. Furthermore, the control electronics 220 are arranged in the positioning receiver 240, 260.

Fig. 6 also shows the positioning tabs 212, 214 arranged in the positioning receptacles 272, 273, by means of which the positioning bracket 200 is secured in the elongate housing 110 in a rotationally fixed manner. Fig. 7 also shows a second positioning section 209 formed in the manner of a hollow cuboid 710.

Fig. 8 shows an elongated housing 110 and the positioning bracket 200 of fig. 1 to 7 arranged in an inner space 210, wherein the housing 110 is shown in a transparent manner. Fig. 8 shows the arrangement of the positioning tabs 214 of the positioning bracket 200 in the positioning receptacles 272, 273 of the housing 110.

Fig. 9 shows a part of the positioning bracket 200 in fig. 1 to 8, wherein at least one cable holding section 249 is arranged on the outer circumference 207 of the positioning bracket 200. The cable holding section 249 is used here for the safe and secure arrangement of the cable 215 (for example the drive motor 140 and/or the power supply cable of the control electronics 220) on the positioning bracket 200. In particular, when the positioning bracket 200 is disposed in the housing 110, the cable 215 can be prevented from being caught.

Preferably, the cable retention section 249 comprises two retention tabs 911, 912 arranged substantially perpendicular to each other, which form a cable receiving device 913. Preferably, the two holding tabs 911, 912 are arranged parallel to the longitudinal axis or axis of rotation 103 in fig. 1. According to one embodiment, the length of the retention tabs 911, 912 is approximately 1 millimeter.

Claims (13)

1. A hand-held power tool (100), in particular a screwdriver, comprising: -an elongated housing (110) in which at least one drive motor (140) for rotating the drive tool receiving means (120), a battery (150) for powering the drive motor (140) independently of the power grid and associated control electronics (220) are arranged; and a positioning bracket (200) forming an inner space (205, 206) for positioning the drive motor (140), the battery (150) and associated control electronics (220) in the elongated housing (110), characterized in that the positioning bracket (200) has a first positioning section (208) for positioning the drive motor (140) and a second positioning section (209) for positioning the associated control electronics (220) and the battery (150), wherein the first and second positioning sections (208, 209) have different cross sections.

2. Hand-held power tool according to claim 1, characterized in that the first positioning section (208) is formed in the manner of a hollow cylinder and the second positioning section (209) is formed in the manner of a hollow cuboid.

3. Hand-held power tool according to claim 1 or 2, characterized in that the positioning bracket (200) has, along the longitudinal extension (105) of the elongate housing (110), a first positioning tab (235, 255) for positioning the associated control electronics (220) and a second positioning tab (241, 261) for positioning the battery (150), wherein the two positioning tabs (235, 255, 241, 261) are arranged substantially parallel to one another and are decoupled from one another by a recess (248).

4. A hand-held power tool according to claim 3, characterized in that the positioning bracket (200) has two complementarily formed half-shells (230, 250) which are connected to one another by means of a locking connection (411-414; 511, 512), wherein each half-shell (230, 250) has a first and a second positioning tab (235, 255, 241, 261), respectively.

5. The hand-held power tool according to claim 3 or 4, characterized in that the second positioning section (209) has the first and second positioning tabs (235, 255, 241, 261).

6. Hand-held power tool according to one of the preceding claims, characterized in that the second positioning section (209) has at least two holding sections (236, 237, 238, 239, 256, 257, 258, 259) which form a positioning receiver (240, 260) for the associated control electronics (220).

7. Hand-held power tool according to one of the preceding claims, characterized in that the second positioning section (209) has at least one positioning tab (242, 243, 244, 262, 263, 264) which surrounds the battery (150) at least in sections for positioning.

8. The hand-held power tool according to any one of the preceding claims, characterized in that the first positioning section (208) has a ventilation recess (233, 253).

9. Hand-held power tool according to any one of the preceding claims, characterized in that the positioning bracket (200) has at its outer periphery (207) at least one positioning receiving means (272, 273) arranged along the longitudinal extension (105) of the elongate housing (110) for receiving at least one positioning tab (212, 214) assigned to the at least one positioning receiving means (272, 273) and formed on the inner side (210) of the elongate housing (110).

10. Hand-held power tool according to any one of the preceding claims, characterized in that the positioning bracket (200) has a connecting strut (291, 293) arranged transversely to the longitudinal extension (105) of the elongate housing (110), which connecting strut is formed for axially fixing the battery (150) in the associated receiving device (206) of the positioning bracket (200).

11. Hand-held power tool according to any one of the preceding claims, characterized in that the positioning bracket (200) is screwed onto the elongate housing (110) by means of at least one screw dome (234, 254) for axial fixation.

12. Hand-held power tool according to claim 11, characterized in that the at least one screw dome (234, 254) forms a clamping connection (621) with a receiving device (221, 222) associated with the associated control electronics (220).

13. Hand-held power tool according to any one of the preceding claims, characterized in that the positioning bracket (200) has at least one cable holding section (249) on its outer circumference (207).