Abstract
A hand-held power tool, in particular a screwdriver, includes a housing, a drive motor, and a gear unit for driving a tool holder designed to hold an insertion tool, and having an insertion tool magazine for storing a plurality of selectable insertion tools. The gear unit is arranged at least in sections within the insertion tool magazine.
Claims
1. A hand-held power tool comprising: a housing; a drive motor within the housing; a gear unit operably connected to the dive motor and configured to drive a tool holder which is configured to hold an insertion tool; and an insertion tool magazine configured to store a plurality of selectable insertion tools, wherein the gear unit is arranged at least in sections within the insertion tool magazine.
2. The hand-held power tool according to claim 1, wherein: the gear unit comprises an outer holder for the insertion tool magazine; and the outer holder is designed such that the insertion tool magazine is rotatably arranged on the gear unit.
3. The hand-held power tool according to claim 1, wherein the gear unit comprises at least one air inlet opening formed on an end facing away from the drive motor and designed to direct air towards the drive motor.
4. The hand-held power tool according to claim 1, wherein: the gear unit comprises a gear end plate; and the gear end plate is configured to be locked by at least one locking element via a gear housing holder.
5. The hand-held power tool according to claim 4, wherein: the gear end plate is configured to be connected to the drive motor; the gear end plate has a motor shaft opening; and the motor shaft opening is designed such that a motor shaft of the drive motor is passed through the motor shaft opening.
6. The hand-held power tool according to claim 1, wherein the gear end plate has at least one circumferentially formed air guide opening designed to direct air towards the drive motor.
7. The hand-held power tool according to claim 1, wherein: the gear unit comprises at least one ring gear having at least one anti-rotation element; a gear housing comprises at least one anti-rotation holder designed on an end facing away from the drive motor; and the anti-rotation element is designed to engage in the anti-rotation holder and secure the ring gear against rotation.
8. The hand-held power tool according to claim 1, wherein: the gear unit comprises a locking ring and a gear output shaft holder; and the locking ring is designed to rotatably hold the gear output shaft holder.
9. The hand-held power tool according to claim 8, wherein: the locking ring comprises at least a locking bar on its outer circumference; a gear housing comprises at least one locking holder; and the locking bar is designed to engage in the locking holder.
10. The hand-held power tool according to claim 1, wherein the drive motor is arranged at least in sections within the insertion tool magazine.
11. The hand-held power tool of claim 1, wherein the gear unit comprises an inner holder that at least partially accommodates the drive motor.
12. The hand-held power tool according to claim 1, wherein: the gear unit at a gear neck comprises at least one securing element; the housing comprises at least one securing holder; and the securing holder is designed such that the securing holder accommodates the securing element and secures the gear unit against rotation of the gear unit.
13. The hand-held power tool according to claim 1, wherein: the gear unit comprises at least one contact element; the housing comprises at least one contact holder; and the contact element is designed to abut the contact holder and to introduce at least radial forces that occur into the housing.
14. The hand-held power tool according to claim 1, wherein: the gear unit comprises at least one fixing element; the housing comprises at least one fixing holder; and the fixing holder accommodates the fixing element to axially secure the gear unit.
15. The hand-held power tool according to claim 1, wherein: the gear unit comprises at least one vent element arranged at least partially axial to the gear unit and/or the drive motor and designed to vent at least the gear unit.
16. The hand-held power tool of claim 1, wherein the hand-held power tool is a screwdriver.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The disclosure is explained in more detail in the following with reference to a preferred embodiment. In the following, the drawings show:
[0032] FIG. 1 a side view of a hand-held power tool according to the present disclosure;
[0033] FIG. 2 a section of a longitudinal cross-section of the hand-held power tool;
[0034] FIG. 3 a side view of an insertion tool magazine having a drive unit;
[0035] FIG. 4a a front perspective view of a gear housing;
[0036] FIG. 4b a rear perspective view of the gear housing;
[0037] FIG. 4c a perspective view of a locking ring of a gear unit;
[0038] FIG. 4d a perspective view of a gear output shaft holder of the gear unit;
[0039] FIG. 4e a perspective view of a gear output shaft of the gear unit;
[0040] FIG. 4f a perspective view of a ring gear of the gear unit;
[0041] FIG. 4g a perspective view of a gear end plate of the gear unit;
[0042] FIG. 4h a section of a side view of a housing half of a housing of the hand-held power tool;
DETAILED DESCRIPTION
[0043] FIG. 1 shows a hand-held power tool 100 according to the disclosure, wherein it is designed here for example as a cordless screwdriver. The hand-held power tool 100 comprises an output shaft 124 and a tool holder 150. The hand-held power tool 100 comprises a housing 110 with a handle 126. To provide a mains-independent power supply, the hand-held power tool 100 can be mechanically and electrically connected to a power supply for cordless operation, so that the hand-held power tool 100 is designed as a cordless hand-held power tool 100. In this case, a fixed battery 130 serves as a power supply. However, the present disclosure is not limited to cordless hand-held power tools, but can also be applied to mains-dependent, i.e., mains-powered, hand-held power tools.
[0044] The housing 110 comprises a drive unit 111, wherein the drive unit 111 is arranged at least partially in the housing 110. The drive unit 111 comprises an electric drive motor 114, which is supplied with current by the battery 130, and a gear unit 118. The drive motor 114 comprises a motor housing 115. The gear unit 118 is designed as a planetary gear 166, see also FIGS. 2 and 4. The drive motor 114 is designed such that it can be actuated, for example via a manual switch 128, so that the drive motor 114 can be switched on and off. The drive motor 114 can advantageously be electronically controlled and/or regulated, so that a reversing mode and a desired rotational speed can be implemented. For the reversing mode, the hand-held power tool 100 comprises a rotation direction switching element 121 designed as a rotation direction changeover switch. The rotation direction switching element 121 is designed to switch the drive motor 114 between a clockwise direction of rotation and a counterclockwise direction of rotation. The design and mode of operation of a suitable drive motor are well known to those skilled in the art, which is why they will not be discussed in detail here.
[0045] The gear unit 118 is connected to the drive motor 114 via a motor shaft 116. The gear unit 118 is provided to convert a rotation of the motor shaft 116 into rotation between the gear unit 118 and the tool holder 150, wherein the gear unit 118 and the tool holder 150 are connected to each other via an intermediate gear 164, see also FIGS. 2 and 3. The gear unit 118 comprises a gear housing 119, which is at least partially arranged in the housing 110. The hand-held power tool 100 comprises a tool axis 102, wherein an axis of rotation of the drive shaft 116 forms the tool axis 102. In addition, the hand-held power tool comprises a further tool axis 104 formed by an axis of rotation of the tool axis 150. Axial should be understood as essentially parallel to the tool axis 102 and/or the further tool axis 104. Radial should be understood as essentially perpendicular to the tool axis 102 and/or the further tool axis 104.
[0046] Furthermore, the gear unit 118 comprises a gear output shaft 136. The gear output shaft 136 drives the tool holder 150 via the intermediate gear 164. The gear output shaft 136 projects at least in sections out of an insertion tool magazine 200, see also FIGS. 2 and 3. Furthermore, the motor shaft 116 and the gear output shaft 136 are coaxially arranged with respect to each other, see also FIG. 2.
[0047] The tool holder 150 is preferably integrally formed with and/or designed on the output shaft 124, see also FIG. 2. The tool holder 150 is preferably arranged in an axial direction 132 facing away from the drive unit 111. The tool holder 150 is designed here as a hexagon socket, in the form of a bit holder, which is provided to hold an insertion tool 140. The insertion tool is designed in the form of a screwdriver bit having a polygonal outer coupling 142.
[0048] The hand-held power tool 100 comprises a control unit 170 at least for controlling the drive unit 111, in particular the drive motor 114. The housing 110 at least partially accommodates the control unit 170. The control unit 170 comprises a microprocessor not shown in detail.
[0049] The hand-held power tool 100 comprises the insertion tool magazine 200 for storing a plurality of selectable insertion tools 140, see also FIGS. 2-4. The gear unit 118 is arranged at least in sections within the insertion tool magazine 200, see also FIGS. 2 to 4. The housing 110 at least partially accommodates the tool holder 150, the drive motor 114, the gear unit 118, and the insertion tool magazine 200. Here, the housing 110 is exemplary shaped as a shell housing with two half shells, see also FIGS. 2 and 3. The housing 110 comprises at least one motor holder 112 formed on each of the two half shells. The motor holder 112 is designed to at least partially hold the motor housing 115 and to substantially arrange it within the housing 110.
[0050] FIG. 2 shows a section 400 of a longitudinal section of the hand-held power tool 100. Electrical leads are not shown in more detail here. The motor shaft 116 comprises a motor pinion 117 that engages in the planetary gear 166. The motor pinion 117 is substantially arranged within the insertion tool magazine 200. The planetary gear 166 comprises at least one planetary gear stage 167, 168, 169 and a ring gear 129, wherein the at least one planetary gear stage 167, 168, 169 is arranged substantially concentrically to the insertion tool magazine 200. By means of example, three planetary gear stages 167, 168, 169 are provided; a first planetary gear stage 167, a second planetary gear stage 168, and a third and last planetary gear stage 169. The third planetary gear stage 169 drives the gear output shaft 136. The gear housing 119 is arranged in a radial direction to the tool axis 102 between the planetary gear 166 and the insertion tool magazine 200. Furthermore, the planetary gear 166 is arranged in an axial direction to the tool axis 102 between the drive motor 114 and the intermediate gear 164, in which the planetary gear train 166 is arranged substantially entirely within the insertion tool magazine 200.
[0051] The insertion tool magazine 200 is formed to store the plurality of selectable insertion tools 140, wherein the insertion tool magazine 200 is formed as a drum magazine. The insertion tool magazine 200 includes a plurality of insertion tool chambers 210, see also FIGS. 3 and 4. The insertion tool magazine 200 is rotatably formed opposite the housing 110,wherein it is arranged at least partially within the housing 110. Each of the insertion tool chambers 210 at least partially accommodates the respective insertion tool 140. The gear unit 118, in particular the gear housing 119, comprises an outer holder 180 for the insertion tool magazine 200, wherein the gear housing 119 here forms the outer holder 180 for the insertion tool magazine 200, such that the gear housing 119 and the outer holder for the insertion tool magazine 200 are formed in one piece, see also FIG. 4. The outer holder 180 is designed such that the insertion tool magazine 200 is rotatably arranged on the gear housing 119. The outer holder 180 for the insertion tool magazine 200 is designed such that the insertion tool magazine 200 is rotatably supported at least partially within the housing 110.
[0052] The insertion tool magazine 200 comprises an inner holder 212 for the gear unit 118, in particular the gear housing 119. The outer holder 180 for the insertion tool magazine 200 accommodates the inner holder 212 of the insertion tool magazine 200 for the gear unit 118, in particular the gear housing 119. The insertion tool magazine 200 is thereby arranged circumferentially around the gear unit 118. By means of example, the insertion tool magazine 200 is formed as a hollow cylindrical body, such that an inner lateral surface 214 of the insertion tool magazine 200 forms the inner holder 212 for the gear unit 118, see also FIGS. 3 and 4. The gear housing 119 is formed as a pot-shaped hollow body, wherein the planetary gear stages 167, 168, 169 are arranged substantially within the hollow body, see also FIGS. 3 and 4.
[0053] The gear unit 118, in particular the gear housing 119, comprises at least one air inlet opening 220 formed on an end facing away from the drive motor 114, wherein four arc-shaped air inlet openings 220 are provided herein, see also FIG. 4. The air inlet openings 220 are circumferentially arranged around the tool axis 102. Furthermore, the gear housing 119 comprises a gear neck 138, see also FIGS. 3 and 4. The gear neck 138 is formed on an end of the gear housing 119 opposite the drive motor 114, wherein the gear neck 138 is arranged substantially axially to the tool axis 102 between the third planetary gear stage 169 and the intermediate gear 164. The gear neck 138 comprises two gear output shaft bearings, not shown in detail, that rotatably support the gear output shaft 136. The air inlet openings 220 are formed in sections circumferentially around the gear neck 138. In addition, the air inlet openings 220 are formed concentrically at least in sections to the gear output shaft 138 on the gear housing 119 and arranged axially to the tool axis 102 between the intermediate gear 164 and the third planetary gear stage 169. The gear unit 118 has a gear end plate 182. The ring gear 129 is arranged axially to the tool axis 102 between the gear neck 138 and the gear end plate 182. The ring gear 129 is arranged coaxially to the gear collar 138 substantially within the gear housing 119.
[0054] The gear end plate 182 can be locked by means of at least one locking element 184 via a gear housing holder 186, see also FIGS. 4b and g. The gear end plate 182 can be connected to the drive motor 114, in particular the motor housing 115. In this case, the gear end plate 182 is bolted, for example, to the drive motor 114, in particular the motor housing 115.
[0055] The gear unit 118 comprises a locking ring 240 and a gear output shaft holder 250, see also FIGS. 4c and d. The locking ring 240 is designed to rotatably hold the gear output shaft holder 250 and formed with a circular inner holder 242 in the manner of a ring. The locking ring 240 is arranged substantially within the gear housing 119 and is arranged on the end of the gear housing 119 facing away from the drive motor 114. The locking ring 240 is arranged axially to the tool axis 102 between the gear neck 138 and the drive motor 114. The locking ring 240 is designed to rotatably support the gear output shaft holder 250 substantially within the circular inner holder 242, see also FIG. 4c. The gear output shaft holder 250 is designed as a planetary carrier 174 of the third planetary gear stage 169, see also FIG. 4d. Here, the gear output shaft holder 250 abuts the locking ring 240 and connects the third planetary gear stage 169 to the gear output shaft 136. The gear output shaft holder 250 comprises an opening 252 to hold a protrusion 137 of the gear output shaft 136, see also FIG. 4e. By means of example, the opening 252 of the gear output shaft holder 250 is formed like a dumbbell. The gear output shaft holder 250 comprises a connection holder 254 formed on a side facing away from the drive motor 114, wherein it is here formed in sections as three bars arranged in a circumferential direction to the tool axis 102. The gear output shaft 136 comprises at least partially circumferential, shoulder-like protrusions 139 that can be connected to the connection holder 254 in a form-fit manner, see also FIG. 4e. An outer circumference of the connection holder 254 is rotatably arranged on the inner holder 242 of the locking ring 240.
[0056] The drive motor 114, in particular the motor housing 115, is arranged at least in sections within the insertion tool magazine 200, wherein the drive motor 114 at least partially projects into the inner holder 212 of the insertion tool magazine 200. The insertion tool magazine 200 overlaps the drive motor 114 at least in sections. The drive motor 114 is arranged at least in sections substantially concentrically to the insertion tool magazine 200.
[0057] The gear unit 118, in particular the gear housing 119, comprises an inner holder 188 that at least partially accommodates the drive motor 114, in particular the motor housing 115. Here, the inner holder 188 of the gear unit 118 encloses at least in sections the drive motor 114, in particular the motor housing 115. The gear housing 118 comprises a bar 190 that is at least partially circumferential. The motor housing 115 abuts at least partially the bar 190, wherein the inner holder 188 forms the bar 190. The inner holder 188 of the gear housing can be arranged radially to the tool axis between the motor housing and the insertion tool magazine.
[0058] FIG. 3 shows a side view of the insertion tool magazine 200 with the drive unit 111. The gear unit 118, in particular the gear housing 119, comprises at least one securing element 192 on the gear neck 138, wherein two securing elements 192 are provided here. The housing 110 comprises at least one securing holder 260, wherein two securing holders 260 are provided here, see also FIG. 4h. The securing holder 260 is designed such that the securing holder 260 accommodates the securing element 192 and secures the gear unit 118, in particular the gear housing 119, against rotations of the gear unit 118, in particular the gear housing 119. The securing element 192 is formed substantially parallel to the tool axis 102 and is formed in the manner of a bar. The securing element 192 and the gear neck 138 are formed in one piece. The securing holder 260 is designed to hold the securing element 192 at least in a form-fit manner
[0059] The gear unit 118, in particular the gear housing 119, comprises a contact element 194. The housing 110 comprises a contact holder, see also FIG. 4h. The contact element 194 is designed to abut the contact holder 262, see also FIG. 2. The contact element 194 is arranged opposite to the gear neck 138 on the gear housing 119, wherein the gear housing 119 forms the contact element 194. The contact element 194 is coaxial and substantially concentric to the inner holder 188 of the gear unit 118, in particular the gear housing 119. Here, the contact element 194 is formed circumferentially to the tool axis 102 around the gear housing 119 and is formed as a contact bar. The contact element 194 is arranged transversely to the tool axis 102 on the gear housing 110.
[0060] Furthermore, the gear unit 118, in particular the gear housing 119, comprises at least one fixing element 196, wherein two fixing elements 196 are provided herein. The housing 110 comprises at least one fixing holder 264, wherein two fixing holders 264 are provided herein. The fixing holder 264 accommodates the fixing element 196 at least for axially securing the gear unit 118, in particular the gear housing 119. The fixing element 196 is formed as one piece with the gear housing 119. The fixing element 196 is here formed, by means of example, in the manner of a square disc type and in the circumferential direction to the tool axis 102 at the outer circumference of the gear housing 119. The fixing element 196 is coaxial to the inner holder 188 of the gear unit 118, in particular of the gear housing 119.
[0061] FIG. 4a shows a front perspective view of the gear housing 119. The gear housing 119 comprises a vent element 222, wherein the vent element 222 is formed at least partially axially to the gear unit 118, in particular the gear housing 119. FIG. 4b is a rear perspective view of the gear housing 119. The vent element 222 is formed herein as an axial groove that forms a polygonal opening at the gear neck 138, see also FIG. 4a. The vent element 222 is formed within an inner circumference 181 of the gear housing 119. The vent element 222 comprises two openings, wherein a first opening is formed on the gear neck 138 and a second opening is formed on the drive motor 114.
[0062] The gear housing 119 comprises the gear housing holder 185 for the gear end plate 182. The gear housing 119 and the gear housing holder 186 are formed in one piece, wherein the gear housing holder 182 is formed on the inner circumference 181 of the gear housing 119, wherein four gear housing holders 186 are formed. The ring gear 129 comprises at least one anti-rotation element 266, wherein three anti-rotation elements 266 are formed herein, see also FIG. 4f. The gear housing 110 comprises at least one anti-rotation holder 198 formed on an end facing away from the drive motor 114. The anti-rotation element 266 is designed to engage in the anti-rotation holder 198, thereby securing the ring gear 129 against rotation. The anti-rotation holder 198 is designed to complement the anti-rotation element 266, see also FIG. 4f. The anti-rotation holder 198 is shaped such that the anti-rotation element 266 at least engages in the anti-rotation holder 198 in a form-fit manner Here, the gear housing 119 forms the anti-rotation holder 198, wherein three anti-rotation holders 198 are formed.
[0063] The locking ring 240 comprises at least one locking bar 246 on its outer circumference 244, see also FIG. 4c. The gear housing 119 comprises at least one locking holder 270, wherein three locking holders 270 are formed herein. The locking bar 246 is designed to engage in the locking holder 270. The locking bar 246 and the locking holder 270 are designed to be complementary to each other. The anti-rotation holder 198 and the locking holder 270 are alternately arranged circumferentially in the gear housing 119, wherein these are separated from each other by housing bars 272.
[0064] FIG. 4c is a perspective view of the locking ring 240 of the gear unit 118. The locking bar 246 is formed in an arc-shape, wherein the locking bar 246 can at least engage in the locking holder 270 in a form-fit manner. Three locking bars 270 are formed here.
[0065] FIG. 4d shows a perspective view of the gear output shaft holder 250 of the gear unit 118. The planetary carrier 174 comprises three planetary bolts 172, wherein only one of the planetary bolts 172 is shown here. FIG. 4e shows a perspective view of the gear output shaft 136 of the gear unit 118. The gear output shaft 136 comprises a holder 176 for the gear output shaft bearings. In addition, the gear output shaft 136 comprises a holder 178 for the gearwheel 165 of the intermediate gear 164. FIG. 4f is a perspective view of the ring gear 129 of the gear unit 118. The ring gear 129 forms the anti-rotation element 266, wherein three anti-rotation elements 266 are provided herein. The ring gear 129 is formed in one piece with the anti-rotation elements 266. The anti-rotation elements 266 are circumferentially formed on the ring gear 129, wherein the anti-rotation elements 266 are formed at least partially as circumferential bars. The ring gear 129 comprises an outer holder 274 for the gear housing 119. In addition, the ring gear 129 comprises an inner toothing 276 for the planetary gear stages 167, 168, 169 of the planetary gear 166.
[0066] FIG. 4g shows a perspective view of the gear end plate 182 of the gear unit 118. The gear end plate 182 is disc-shaped, wherein the gear end plate 182 forms the locking element 184. The gear end plate 182 and locking element 184 are formed as one piece here, wherein four locking elements 184 are provided. The locking element 184 is formed in the manner of a bar in the circumferential direction around the gear end plate 182. The locking element 184 forms a type of bayonet connection with the gear housing holder 186. The gear end plate 182 comprises a motor shaft opening 187 that is formed as a circle herein. The motor shaft opening 187 is formed such that the motor shaft 116 of the drive motor 114 can be passed through the motor shaft opening 187. An inner diameter of the motor shaft opening 187 is designed such that the motor pinion 117 on the motor shaft 116 can be passed through the motor shaft opening 187. The gear end plate 182 comprises at least one circumferentially formed air guide opening 224, wherein air guide openings 224 are provided here, each formed in an arc-shaped manner The air guide opening 224 is designed to direct air in the direction of the drive motor 114. The air guide openings 224 are each arranged radially to the tool axis 102 between the motor shaft opening 187 and the locking element 184. The gear end plate 182 comprises at least one screw connection opening 189 for screwing the gear end plate 182 to the motor housing 115. Here, two screw connection openings 189 are provided. The screw connection opening 189 is designed such that at least one screw can be passed though through the screw connection opening 189 to the motor housing 115, such that the screw connection can be formed between the gear end plate 182 and the motor housing 115.
[0067] FIG. 4h shows the section 400 of a side view of a housing half 280 of the housing 110 of the hand-held power tool 100. The securing holder 260 is formed in the manner of a shaft, wherein the housing 110 forms the securing holder 260. In addition, each housing half 280 comprises a securing holder 260. The contact holder 262 is formed as a bar transverse to the tool axis 102. The contact holder 262 is formed by the housing 110. The fixing holder 264 is formed as a type of pocket, wherein each housing half 280 forms a fixing holder 264. The housing half 280 comprises a holder 282 for the gear neck 138, wherein each of the housing halves 280 comprises a holder 282 for the gear neck 138. Furthermore, each of the housing halves 280 each has a holder 284 for the tool holder 150.
