CN113263469A

CN113263469A - Hand-held power tool with a work area lighting device

Info

Publication number: CN113263469A
Application number: CN202110184545.2A
Authority: CN
Inventors: M·洛伊佩特
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 2020-02-17
Filing date: 2021-02-10
Publication date: 2021-08-17
Also published as: DE102020201946A1

Abstract

The invention relates to a hand-held power tool (100), in particular a screwdriver, comprising a housing (105), at least one drive unit (180) for driving the tool receptacle (140) is arranged in the housing, wherein the tool receptacle (140) is designed to receive a plug-in tool, wherein a working area lighting device (150) is arranged on an end face (199) of the housing (105) associated with the tool receptacle (140) in an annular manner around the tool receptacle (140), the work area lighting device (150) has a retaining ring (156), the retaining ring (156) having a receptacle (159) for arranging at least one light-emitting means (254), wherein the work area lighting device (150) is clamped between the drive unit (180) and an end face (199) of the housing (105).

Description

Hand-held power tool with a work area lighting device

Technical Field

The invention relates to a hand-held power tool, in particular a screwdriver, having a housing in which at least one drive unit is arranged for driving a tool receptacle, wherein the tool receptacle is designed for receiving a plug-in tool, and wherein a working area lighting device is arranged on an end face of the housing associated with the tool receptacle in a manner surrounding the tool receptacle in an annular manner.

Background

Such hand-held power tools with a working area lighting device are known from the prior art. The working area illumination device is arranged in a ring-shaped manner around the tool receptacle for illuminating the associated processing area. Preferably, the working area lighting device is fixedly connected to the housing of the hand-held power tool, for example by a screw connection.

Disclosure of Invention

The invention relates to a hand-held power tool, in particular a screwdriver, having a housing in which at least one drive unit is arranged for driving a tool receptacle, wherein the tool receptacle is designed for receiving a plug-in tool, and wherein a working area lighting device is arranged on an end face of the housing associated with the tool receptacle in a manner surrounding the tool receptacle in an annular manner. The work area lighting device has a retaining ring with a receptacle for arranging at least one light emitting means, wherein the work area lighting device is clamped between the drive unit and an end face of the housing.

The invention can thus provide a hand-held power tool in which the working area lighting device can be arranged stably and robustly by clamping the retaining ring belonging to the working area lighting device.

Preferably, the retaining ring has in the radial direction an inner and an outer circumferential flange which are arranged concentrically with respect to one another, wherein the inner and outer circumferential flanges are connected to one another by an annular face, and wherein the receptacle is configured in the form of an annular groove extending along the annular face between the inner and outer circumferential flanges.

Thus, a suitable retaining ring can be provided in a simple manner.

Preferably, the drive unit has a gear mechanism, which is arranged in an associated gear mechanism housing, wherein the retaining ring is supported on the gear mechanism housing.

Thus, a compact design of the gear housing and of the work area lighting device can be provided.

Preferably, the housing has a housing cover on its end face assigned to the tool receptacle, which housing cover has a radially inwardly directed circumferential flange, wherein the retaining ring is arranged and fixed between the transmission housing and the radially inwardly directed circumferential flange.

Thus, clamping of the retaining ring in the housing is enabled in a simple manner.

According to one embodiment, the transmission housing has a torque setting device on the output side, which has a receiving region for rotatably movably supporting the tool receptacle and has a threaded region, wherein the receiving region and the threaded region are arranged coaxially relative to one another, and wherein the retaining ring is supported by means of its central through-opening on the outer periphery of the receiving region and is loaded in the axial direction against the threaded region.

Thus, a stable and robust fixing of the retaining ring in the housing is enabled.

Preferably, at least one positioning tab is provided in the receptacle for positioning the circuit board associated with the at least one light-emitting means in a predetermined angular position.

Thus, a simplified and uncomplicated assembly of the work area lighting arrangement is enabled.

Preferably, the retaining ring has a slot for guiding through a current supply line associated with the circuit board.

Therefore, direct wiring (Verkabelung) of the circuit board and the current supply device can be provided in a simple manner.

The outer circumferential flange preferably has at least one loading element directed inward in the radial direction for loading the at least partially transparent cover of the work area lighting device into the receptacle.

Therefore, the transparent cover can be securely and reliably fixed to the retaining ring.

According to one embodiment, the at least partially transparent cover at least substantially encloses the receptacle.

Thus, a safe and robust protection of the at least one light emitting element of the work area lighting arrangement may be provided.

Preferably, the retaining ring has at least one positioning tab directed outward in the radial direction for positioning the retaining ring in a predetermined angular position in the housing of the hand-held power tool.

The retaining ring can therefore be positioned in the housing simply and uncomplicated.

The invention further relates to a work area lighting device for a hand-held power tool, in particular a screwdriver, wherein the hand-held power tool has a housing in which at least one drive unit is arranged for driving a tool receptacle, wherein the tool receptacle is designed for receiving a plug-in tool, and wherein the work area lighting device can be arranged on an end face of the housing associated with the tool receptacle in a ring-shaped manner around the tool receptacle. The work area lighting device has a retaining ring with a receptacle for arranging the at least one light emitting means, wherein the work area lighting device can be clamped between the drive unit and the housing end face of the hand-held power tool.

Drawings

The invention is explained in detail in the following description on the basis of embodiments shown in the drawings. The figures show:

fig. 1 is a perspective view of a hand-held power tool with a working area lighting device;

fig. 2 is an enlarged, fragmentary, perspective view of the working area lighting device of fig. 1 with the housing of the hand-held power tool of fig. 1 diagrammatically partially open;

figure 3 a longitudinal section through the work area lighting apparatus of figure 2,

fig. 4 is a perspective view of a retaining ring associated with the work area illumination device of fig. 1 to 3.

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

Detailed Description

Fig. 1 shows an exemplary hand-held power tool 100 having a housing 105 in which a drive unit 180 having at least one drive motor 185 is preferably arranged. The drive unit 180 is preferably configured for rotationally driving the tool receiver 140. Here, the tool receiver 140 is designed to receive a plug-in tool. Preferably, the tool receiving portion 140 is configured with an inner receiving portion 142 for receiving an insertion tool configured as a driver bit and/or a drilling tool. In operation, the tool receiver 140 rotates about the longitudinal axis 109.

The drive motor 185 is preferably configured as an electronically commutated motor, but may be any other electric drive motor, such as a brushed motor or the like. Here, the drive motor 185 can be switched on and off preferably by a manual switch 195. The housing 105 of the hand-held power tool 100 preferably has a handle 107, wherein a manual switch 195 is arranged on the handle 107. Furthermore, the housing 105 has a housing cover 177 on its end side 199 associated with the tool receptacle 140. Illustratively, the housing cover 177 is configured as a housing cover. Preferably, the housing cover 177 has at least in sections a radially inwardly directed peripheral flange (231 in fig. 2).

According to one embodiment, the drive unit 185 is assigned a shiftable transmission 170. The shiftable gear unit 170 is preferably designed as a planetary gear unit. Here, the shiftable transmission 170 is arranged in a transmission housing 175. The transmission housing 175 is disposed in the housing 105.

Preferably, the hand-held power tool 100 has a torque setting device 160. The torque setting device 160 is designed to set a predetermined torque at least within predetermined limits or to set a maximum torque that can be applied to the tool receiver 140, wherein the tool receiver 140 is decoupled from a drive shaft associated with the drive unit 180 when the predetermined or predetermined torque is reached. Preferably, the torque adjustment device 160 is arranged in the output-side region of the transmission housing 175 or at an axial end facing the front side 199.

Preferably, a work area lighting device 150 is arranged on an end side 199 of the housing 105. Preferably, the work area illumination device 150 annularly surrounds the tool receptacle 140. Preferably, the work area illumination device 150 and the tool receiving portion 140 are coaxially arranged with respect to each other. The work area lighting device 150 is preferably equipped with a retaining ring 156 having a receptacle 159 for arranging at least one light emitting means (254 in fig. 2).

Preferably, the work area lighting device 150 is sandwiched between the drive unit 180 and an end side 199 of the housing 105. Preferably, the work area lighting device 150 is sandwiched between the drive unit 180 and the housing cover 177 of the housing 105 and is thereby fixed in the housing 105. In this case, the work area lighting device 150 is supported on the gear mechanism housing 175, in particular on the output-side region of the gear mechanism housing 175.

Preferably, the transmission housing 175 has a cylindrical section (242 in fig. 2) on the output side, preferably in the region of the torque adjustment device 160. Preferably, the tool receiving portion 140 is at least partially disposed within the cylindrical section (242 in fig. 2). Furthermore, a working area illumination device 150 is preferably arranged on the outer periphery 179 of the cylindrical section (242 in fig. 2). In particular, the retaining ring 156 of the work area illumination device 150 is illustratively supported on an outer periphery 179 of the transmission housing 175.

The work area lighting device 150 is preferably provided with an at least partially transparent cover 152. Preferably, the cover 152 is constructed to be completely transparent. The cover 152 is preferably arranged at least in sections in a receptacle 159 of the retaining ring 156. Here, the cover 152 at least partially closes the receptacle 159. According to one embodiment, the cover 152 has at least one, illustratively three lenses 154. Preferably, the lens 154 is arranged in the region of the light-emitting means (254 in fig. 2) assigned to the work area lighting device 150.

Preferably, the hand-held power tool 100 can be mechanically and electrically connected to the battery pack 190 for network-independent power supply, but alternatively, it can also be operated, for example, in a network-dependent manner. The hand-held power tool 100 is designed as a screwdriver, for example. However, the hand-held power tool 100 can also be designed as a drill driver or as a hammer.

Fig. 2 shows the work area lighting device 150 from fig. 1, wherein, in fig. 2, the housing 105 of the hand-held power tool 100 is shown partially in section for the purpose of visually illustrating the structure of the work area lighting device 150 and the arrangement of the work area lighting device 150 in the housing 105 of the hand-held power tool 100.

As explained above, the retaining ring 156 of the work area lighting device 150 has a receptacle 159. Preferably, the retaining ring 156 has, in the radial direction 299, an at least partially circumferentially configured inner circumferential flange 212 and an at least partially circumferentially configured outer circumferential flange 211. Preferably, the inner and outer

peripheral flanges

212, 211 are concentrically arranged relative to each other. According to one embodiment, the inner and outer

peripheral flanges

212, 211 are connected to each other by an at least sectionally arranged connection surface 218. Preferably, the connection surface 218 is configured as an annular surface. Furthermore, the receiving portion 159 is preferably configured in the form of an annular groove extending along the connecting surface 218 between the inner and outer

peripheral flanges

212, 211. In addition, the retaining ring 156 has a central through opening 214.

Preferably, a replaceable circuit board 220 having at least one light emitting device 254 is disposed in the receiving portion 159. The printed circuit board 220 is preferably arranged in an adhesive-free manner, i.e., is not fixed in the receptacle 159 by means of an adhesive. Illustratively, the circuit board 220 has an annular base 222. However, the printed circuit board 220 may also be formed from a plurality of printed circuit board sections, which may be designed as ring segments, for example. Preferably, the cover 152 loads the circuit board 220 into the receiving portion 159. Preferably, the at least one light emitting device 254 is configured as an LED. Preferably, at least one light emitting device 254 is provided with a lens 154.

Preferably, the retaining ring 156 has at least one loading element 217 on its outer circumference 215 or on its outer circumferential flange 211, which loading element is directed inward in the radial direction 299. The at least one loading element 217 is configured for loading the cover 152 of the work area lighting device 150 into the receptacle 159.

Furthermore, the retaining ring 156 preferably has at least one positioning web 219 (411, 412, 413 in fig. 4) on its outer circumference 215 or on its outer circumferential flange 211, which is directed outward in the radial direction 299. At least one positioning tab 219 (411, 412, 413 in fig. 4) is designed for positioning the retaining ring 156 in the housing 105 of the hand-held power tool 100. In particular, at least one positioning tab 219 (411, 412, 413 in fig. 4) is configured for positioning the retaining ring 156 in the housing 105 in a predefined angular position.

Fig. 2 furthermore shows a schematic illustration of the torque adjustment device 160 from fig. 1, which is arranged in the region of the output side of the transmission housing 175 of the transmission 170 from fig. 1. To this end, the transmission housing 175 preferably has a cylindrical section 242. As explained above, the tool receptacle 140 is arranged within the cylindrical section 242 and the work area illumination device 150 is arranged, preferably supported, on the outer periphery 179 of the cylindrical section 242.

Furthermore, the torque adjustment device 160 preferably has a threaded region 241. Illustratively, the thread region 241 is formed by at least two web sections 248, which are formed in the axial direction 294 and have an external thread 249, wherein the at least two web sections 248 are arranged spaced apart from one another in the circumferential direction. Preferably, the cylindrical section 242 and the threaded region 241 are coaxially arranged with respect to each other.

Preferably, the retaining ring 156 is disposed and secured between the transmission housing 175 and the radially inwardly directed peripheral flange 231 of the housing cover 177. For this purpose, the retaining ring 156 is preferably supported on the outer circumference of the cylindrical section 242 by means of its central through-opening 214. Furthermore, the retaining ring 156 is loaded against the threaded region 241 in the axial direction 294. To this end, the peripheral flange 231 loads the work area lighting device 150, in particular the retaining ring 156, against the threaded region 241. Furthermore, the peripheral flange 231 loads the cover 152 into the receptacle 159 or fixes it, preferably in addition to the radially inwardly directed loading elements 217, into the receptacle 159 or on the retaining ring 156.

Fig. 3 shows the work area lighting fixture 150 of fig. 1 and 2 with a retaining ring 156. Fig. 3 shows a schematic illustration of the arrangement of the working area lighting device 150 or the retaining ring 156 sandwiched between the threaded section 241 of the gear housing 175 and the peripheral flange 231 of the housing cover 177 and the arrangement on the cylindrical section 242 of the gear housing 175. In this case, the retaining ring 156 rests with its connecting surface on the end side 311 of the threaded section 241 facing the end side 199. Furthermore, the retaining ring 156 preferably has a slot 321 for guiding through a current supply line 399 assigned to the circuit board 220.

Fig. 4 shows the retaining ring 156 of fig. 1 to 3 with inner and outer

circumferential flanges

212, 211, a connecting face 218 and a central through-opening 214, wherein fig. 4 visually shows the positioning tabs 219 or 411, 412, 413 arranged on the outer circumferential flange 211. The three positioning tabs 219 and 411, 412, 413 shown in the figures are preferably configured differently for positioning the retaining ring 156 in a predetermined angular position in the housing 105 of the hand-held power tool 100. Thus, the positioning webs 219 or 411, 412, 413 have different lengths in the circumferential direction and in the radial direction 299.

Preferably, at least one positioning tab 422 is provided in the receptacle 159 of the retaining ring 156 for positioning the circuit board 220 of fig. 2 and 3 in a predetermined angular position in the receptacle 159. The at least one positioning tab 422 is disposed on the inner and/or outer

peripheral flanges

212, 211. Illustratively, three positioning tabs 422 are disposed on the inner periphery of outer peripheral flange 211 facing receptacle 159 and one positioning tab 422 is disposed on the outer periphery of inner peripheral flange 212 facing receptacle 159. Here, the positioning element 422 is oriented in the radial direction 299. Furthermore, the positioning elements 422 preferably have different lengths in the radial direction 299 in order to be arranged at predetermined angular positions. Preferably, the positioning element 422 is arranged on the connection face 218 and on the inner and/or outer

peripheral flanges

212, 211.

Further, fig. 4 shows a notch 321 for guiding the current supply line 399 of fig. 3 therethrough. Illustratively, notches 321 are configured on attachment face 218 and outer peripheral flange 211. Notches 321 may also be configured on the connection face 218, the inner peripheral flange 212, and/or the outer peripheral flange 211.

It should be noted that the connection surface 218, the inner circumferential flange 212 and/or the outer circumferential flange 211 may also be constructed only in sections in the circumferential direction. Furthermore, the illustrated number of positioning elements 219 or 411, 412, 413, positioning tabs 422 and/or loading elements 217 is merely exemplary and should not be considered as limiting the invention. Therefore, more or less than three positioning elements 219 or 411, 412, 413, positioning webs 422 and/or loading elements 217 can also be provided.

Claims

1. A hand-held power tool (100), in particular a screwdriver, having a housing (105), at least one drive unit (180) for driving a tool receptacle (140) is arranged in the housing, wherein the tool receptacle (140) is designed for receiving a plug-in tool, and wherein a working area lighting device (150) is arranged on an end face (199) of the housing (105) associated with the tool receptacle (140) in an annular manner around the tool receptacle (140), characterized in that the work area lighting device (150) has a retaining ring (156), the retaining ring has a receptacle (159) for arranging at least one light emitting device (254), wherein the work area lighting device (150) is clamped between the drive unit (180) and an end face (199) of the housing (105).

2. The hand-held power tool according to claim 1, characterized in that the retaining ring (156) has an inner circumferential flange (212) and an outer circumferential flange (211) in the radial direction (299), which are arranged concentrically relative to one another, wherein the inner and outer circumferential flanges (212, 211) are connected to one another by an annular surface (218), and wherein the receptacle (159) is configured in the form of an annular groove extending along the annular surface (218) between the inner and outer circumferential flanges (212, 211).

3. Hand-held power tool according to claim 1 or 2, characterized in that the drive unit (180) has a gear (170) which is arranged in an associated gear housing (175), wherein the retaining ring (156) is supported on the gear housing (175).

4. The hand-held power tool according to claim 3, characterized in that the housing (105) has a housing cover (177) on its end face (199) associated with the tool receptacle (140), which housing cover has a radially inwardly directed peripheral flange (231), wherein the retaining ring (156) is arranged and fixed between the transmission housing (175) and the radially inwardly directed peripheral flange (231).

5. The hand-held power tool according to claim 3 or 4, characterized in that the transmission housing (175) has a torque setting device on the output side, which has a receiving region (221) for rotatably supporting the tool receiver (140) and has a threaded region (241), wherein the receiving region (221) and the threaded region (241) are arranged coaxially with respect to one another, and wherein the retaining ring (156) is supported by means of its central through-opening (214) on the outer periphery of the receiving region (221) and is loaded in the axial direction (294) against the threaded region (241).

6. The hand-held power tool according to one of the preceding claims, characterized in that at least one positioning tab (422) is provided in the receptacle (159) for positioning a circuit board (220) associated with at least one light emitting means (254) in a predetermined angular position.

7. The hand-held power tool according to claim 6, characterized in that the retaining ring (156) has a slot (321) for guiding through a current supply line (399) associated with the circuit board (220).

8. The hand-held power tool according to one of claims 2 to 7, characterized in that the outer circumferential flange (211) has at least one loading element (217) directed inward in a radial direction (299) for loading an at least partially transparent cover (152) of the work area lighting device (150) into the receptacle (159).

9. The hand-held power tool according to claim 8, characterized in that the at least partially transparent cover (152) at least substantially encloses the receptacle (159).

10. The hand-held power tool according to one of the preceding claims, characterized in that the retaining ring (156) has at least one positioning lug (219; 411, 412, 413) which points outward in the radial direction (299) for positioning the retaining ring (156) in a predefined angular position in a housing (105) of the hand-held power tool (100).

11. A working area illumination device (150) for a hand-held power tool (100), in particular a screwdriver, wherein the hand-held power tool (100) has a housing (105) in which at least one drive unit (180) is arranged for driving a tool receptacle (140), wherein the tool receptacle (140) is designed for receiving a tool insert, and wherein the working area illumination device (150) can be arranged on an end face (199) of the housing (105) associated with the tool receptacle (140) in an annular manner around the tool receptacle (140), characterized in that the working area illumination device (150) has a retaining ring (156) having a receptacle (159) for arranging at least one light-emitting means (254), wherein the working area illumination device (150) can be clipped between the drive unit (180) and the hand-held power tool (100) Between the end sides (199) of the housing (105).