Handheld power tool with a switchable transmission

Abstract

A hand-held power tool, which includes a drive unit for rotatably driving a tool receptacle about an assigned rotational axis, the drive unit having at least one drive motor and a switchable transmission, the switchable transmission being arranged in a transmission housing, the transmission housing including at least partially sleeve-shaped coupling housing and a transmission cover fixed thereto, the switching element being configured to switch the switchable transmission between at least two different gears, a locking sleeve for locking the switching element in at least a first and a second switching position is arranged in the coupling housing, the switchable transmission forms a cross-sectional plane perpendicular to the rotational axis at least in a first switching position of the switching element, in this cross-sectional plane the locking sleeve is arranged at least in regions between the transmission cover and the switching element, and the switching element is arranged at least in regions between the locking sleeve and the coupling housing.

Description

Technical Field

[0001] The present invention relates to a hand-held power tool, which includes a drive unit for rotatably driving a tool receiving part about an assigned rotation axis, wherein the drive unit has at least one drive motor and a switchable transmission device, wherein the switchable transmission device is arranged in a transmission device housing, the transmission device housing includes an at least partially sleeve-shaped coupling housing and a transmission device cover fixed thereto, wherein a switching element is provided for switching the switchable transmission device between at least two different gears, wherein a locking sleeve is arranged in the coupling housing for locking the switching element in at least one first switching position and a second switching position. Background Art

[0002] Such a handheld power tool having a drive unit is known from the prior art. The drive unit comprises a drive motor and a switchable transmission. The switchable transmission is disposed in a transmission housing and can actuate an associated switching ring gear via a shift element to shift gears. The shift element is disposed on the outer circumference of the transmission housing. Summary of the Invention

[0003] The present invention relates to a handheld power tool comprising a drive unit for rotatably driving a tool holder about an associated rotational axis, the drive unit comprising at least one drive motor and a switchable transmission, the switchable transmission being arranged in a transmission housing comprising an at least partially sleeve-shaped coupling housing and a transmission cover secured thereto, a shifting element being provided for shifting the switchable transmission between at least two different gears, a locking sleeve being arranged in the coupling housing for locking the shifting element in at least a first shift position and a second shift position. The switchable transmission, at least in the first shift position of the shifting element, forms a cross-sectional plane perpendicular to the rotational axis, in which the locking sleeve is arranged at least regionally between the transmission cover and the shifting element, and the shifting element is arranged at least regionally between the locking sleeve and the coupling housing.

[0004] The present invention thus makes it possible to provide a handheld power tool which can be equipped with a compact transmission due to a predetermined arrangement in a cross-sectional plane.

[0005] Preferably, the switchable transmission has a switching ring gear which can be axially displaced by the switching element and is arranged in an inner receptacle formed by the locking sleeve, wherein the switching ring gear has a receiving groove on its outer circumference for at least partially receiving the switching element.

[0006] Thus, it is possible to arrange the switching element at least partially on the switching annulus in a reliable and uncomplicated manner to switch gear ratios.

[0007] Preferably, the transmission cover has an annular centering flange arranged in the inner receiving portion of the locking sleeve for centering the locking sleeve in the radial direction.

[0008] Thus, centering of the locking sleeve can be achieved in a simple manner and method.

[0009] The transmission cover preferably engages form-fittingly into the locking sleeve.

[0010] Thus, a safe and reliable arrangement of the transmission cover on the locking sleeve can be achieved.

[0011] According to one embodiment, the locking sleeve has at least one axially oriented positioning tab at its axial end facing the transmission cover, and the transmission cover has a receiving portion for receiving the at least one axially oriented positioning tab.

[0012] Thus, safe and reliable positioning aids can be provided, and pre-positioning of the transmission cover during assembly of the switchable transmission can be achieved.

[0013] Preferably, the locking sleeve has at least one support tab at its axial end facing the transmission cover, and the support tab bears against the threaded hub of the transmission cover.

[0014] Thus, stable and robust support of the transmission cover can be achieved. In addition, the at least one support tab can provide positioning aids and pre-positioning of the transmission cover during assembly of the switchable transmission.

[0015] Preferably, at least two support tabs are provided at the axial end of the locking sleeve facing the transmission cover, and the positioning tab and the support tabs preferably form a triangular arrangement.

[0016] Thus, a compact and reliable arrangement of the transmission cover on the locking sleeve can be achieved.

[0017] Preferably, the transmission cover is fixed to the coupling housing by means of at least one threaded element, and the at least one threaded element loads the transmission cover in the direction of the tool receiving portion. In addition, the transmission cover is preferably fixed on the side of the coupling housing facing the drive motor.

[0018] According to one embodiment, the transmission cover forms the annulus of the switchable transmission on its side facing the tool receiving portion.

[0019] Thus, a compact, switchable transmission with a reduced structural length can be provided.

[0020] Preferably, the locking sleeve has radially opposed deflection tabs formed on its outer circumference for deflecting the switching element when switching from the first gear position to the second gear position. In addition, the locking sleeve preferably has an associated notch through which the switching element passes. In addition, the coupling housing and the locking sleeve are preferably connected to each other by a form-fit connection.

[0021] According to one embodiment, the coupling housing has at least one inwardly projecting portion on its inner circumference, and the locking sleeve has at least one receiving portion on its outer circumference, wherein the at least one projecting portion is disposed in the at least one receiving portion.

[0022] Thus, a torsional stop and / or torque support between the coupling housing and the locking sleeve can be constructed in a simple manner and method.

[0023] Preferably, the at least one projecting portion is arranged parallel to the axis of rotation.

[0024] Thus, a simple and uncomplicated arrangement of the projecting portions can be achieved.

[0025] According to one embodiment, a plurality of projecting portions are configured as single-stage projecting portions having a single stage and / or two-stage projecting portions having a first stage and a second stage, wherein the second stage has a greater height in the radial direction than the first stage.

[0026] Thus, suitable projecting portions can be provided in a simple manner and method.

[0027] Preferably, the locking sleeve has a receiving portion assigned to the projecting portion for torsional stop and centering of the locking sleeve on the coupling housing.

[0028] Thus, a safe and reliable connection between the locking sleeve and the coupling housing can be provided.

[0029] According to one embodiment, a fixing ring is arranged on the axial end of the locking sleeve facing the tool receiving portion, wherein the fixing ring prevents the switching hollow wheel from twisting when the switching element is arranged in the first switching position.

[0030] Thus, safe and reliable operation of the switchable transmission can be achieved, in which the switching hollow wheel is prevented from twisting in the first switching position.

[0031] Preferably, the fixing ring is made of metal. Preferably, the switching hollow wheel has external teeth on its outer circumference, and the fixing ring has internal teeth on its inner circumference, wherein the external teeth of the switching hollow wheel and the internal teeth of the fixing ring form a form-fit.

[0032] According to one embodiment, the locking sleeve has an annular extension, and the fixing ring is arranged on the locking sleeve such that the annular extension receives the fixing ring on the circumferential side.

[0033] Thus, a safe and reliable arrangement of the fixing ring can be achieved, in which a torsion stop and / or torque support of the fixing ring can be formed.

[0034] Preferably, the annular extension is arranged on the axial end of the locking sleeve facing the tool receiving part. Here, preferably, a receiving part is formed between two adjacent annular extensions respectively.

[0035] Preferably, the switchable transmission is a planetary gear transmission, which includes at least one annulus, at least one planet carrier and at least one planet gear. A disc-shaped plate is provided between the at least one planet carrier and the at least one planet gear, which prevents the planet carrier from moving into the annulus in the first switching position of the switching element. Preferably, the disc-shaped plate is axially supported on the coupling housing. Here, the disc-shaped plate is preferably arranged on the axial end of the fixing ring facing the tool receiving part. Here, the disc-shaped plate and the fixing ring preferably each have a notch on their outer circumferences, and the notch is configured to receive a protrusion of the coupling housing. In addition, the fixing ring preferably has tabs on its outer circumference, and a first or second receiving part is formed between two adjacent tabs. The first receiving part is configured to receive the protrusion, and the second receiving part is configured to receive the annular extension of the locking sleeve. Preferably, the coupling housing has a protruding edge (Anstehkante) for supporting the disc-shaped plate at least partially circumferentially on its inner circumference.

[0036] According to one embodiment, the coupling housing has a notch formed along the rotation axis of the tool receiving part, through which the switching element is connected to an operating element for operating the switching element.

[0037] Thus, a safe and reliable operation of the switchable transmission can be achieved.

[0038] Preferably, the switching element has an arcuate, preferably at least approximately U-shaped base body. In addition, the locking sleeve preferably has plastic. Description of the Drawings

[0039] In the following description, the present invention will be elaborated in detail by means of the embodiments shown in the drawings. Here:

[0040] Figure 1 : A side view of a hand-held power tool having a switchable transmission arranged in a transmission housing;

[0041] Figure 2 : Shown arranged in Figure 1in the transmission housing of Figure 1 Perspective view of a switchable transmission;

[0042] Figure 3 : showing Figure 1 and Figure 2 Cross-sectional view of a switchable transmission;

[0043] Figure 4 : showing in the region of the transmission cover assigned to the transmission, Figure 1 and Figure 2 Cross-sectional view of a switchable transmission;

[0044] Figure 5 : showing Figures 1 to 3 Side view of a switchable transmission;

[0045] Figure 6 : showing Figure 4 Side view of a switchable transmission without a locking sleeve assigned to the transmission housing;

[0046] Figure 7 : showing assigned to Figures 1 to 6 Perspective view of a switchable transmission;

[0047] Figure 8 : showing assigned to Figures 1 to 6 Perspective view of the coupling housing of a switchable transmission;

[0048] Figure 9 : showing assigned to Figures 1 to 6 Perspective view of the locking sleeve of a switchable transmission;

[0049] Figure 10 : showing assigned to Figures 1 to 6 Perspective view of the switching hollow wheel of a switchable transmission;

[0050] Figure 11 : showing assigned to Figures 1 to 6 Perspective view of the switching element of a switchable transmission;

[0051] Figure 12 : showing Figure 9 Perspective view of the locking sleeve;

[0052] Figure 13 : showing Figure 12 Perspective view of the locking sleeve including the assigned fixing ring;

[0053] Figure 14 : showing Figures 1 to 6 Cross-sectional view of a switchable transmission to illustrate Figure 13 the arrangement of the fixing ring;

[0054] Figure 15 : showing Figures 1 to 6 A sectional view of a switchable transmission device for illustrating the arrangement of the plate assigned to the locking sleeve; and

[0055] Figure 16 : showing Figures 1 to 6 A longitudinal sectional view of the switchable transmission device.

[0056] Components having the same or similar functions in the drawings are provided with the same reference numerals and are described precisely only once. Detailed Description

[0057] Figure 1 An exemplary hand-held power tool 100 is shown, which includes a housing 105 in which a drive unit 125 for rotatably driving a tool receiving part 140 is preferably arranged. The tool receiving part 140 is configured in the illustration for receiving an insert tool or an application tool 198 and rotates about a rotation axis 199 during operation.

[0058] In the illustration, the hand-held power tool 100 can be mechanically and electrically connected to a battery pack 190 for power supply without grid support, but alternatively it can also be operated, for example, with grid support. Exemplarily, the hand-held power tool 100 is configured as an electric screwdriver. Correspondingly, the tool receiving part 140 is configured in the illustration in the manner of a drill chuck 145, which is exemplarily provided with a protective sleeve 196. However, alternatively, the tool receiving part 140 can also be provided in the manner of a tool accessory, which is detachably arranged on the hand-held power tool 100.

[0059] However, the hand-held power tool 100 can also be configured, for example, as a rotary hammer or an impact electric screwdriver. In this case, the hand-held power tool 100 has an assigned impact mechanism 150, which is not required when it is configured as an electric screwdriver. It should be noted, however, that the present invention is not limited to electric screwdrivers, rotary hammers or impact electric screwdrivers, but can generally be used in hand-held power tools in which the drive unit has a switchable transmission, in particular a planetary gear transmission.

[0060] In the illustrated embodiment, the drive unit 125 has at least one drive motor 180 and a switchable transmission device in the illustration. Preferably, the drive motor 180 is configured as an electronically commutated motor. Preferably, the drive motor 180 can be switched on and off by a manual switch 195, which is arranged on the handle 115 of the housing 105 in the illustration.

[0061] The switchable transmission 120 is preferably configured as a planetary gear transmission. Preferably, the switchable transmission 120 is arranged in a transmission housing 122. Preferably, a switching element ( Figure 16 in 1598, 1599 in Figure 2 ) for switching between at least two different gears is provided for the switchable transmission 120, in which gears the switching element ( Figure 2 ) is arranged in corresponding switching positions ( Figure 16 in 1598, 1599 in Figure 2 ) assigned to the respective gears. Preferably, the switchable transmission 120 has an operating element 127 for operating the switching element ( Figure 2 ) or for manually switching gears by the user. The switchable transmission 120 is hereinafter simply referred to as "transmission 120" for the sake of simplicity.

[0062] In addition, the hand-held power tool 100 optionally has a torque setting device, which includes a torque setting sleeve 197. Such a torque setting device is sufficiently known from the prior art, so that a detailed description of the torque setting device is omitted here for the sake of brevity of description.

[0063] Figure 2 Shown is the transmission 120 arranged in the transmission housing 122, which includes Figure 1 the drill chuck 145. In addition, Figure 2 shown is the operating mode setting element 290. In the illustration, the operating mode setting element 290 is configured as a sleeve.

[0064] The transmission housing 122 preferably has at least partially sleeve-shaped coupling housing 220 and a transmission cover 210 fixed thereto. In addition, preferably, a locking sleeve 230 for locking the switching element 240 is arranged in the coupling housing 220.

[0065] In the illustration, the coupling housing 220 is shown transparently to clarify the view. Here preferably, the locking sleeve 230 is arranged on the inner circumference 222 of the coupling housing 220. Preferably, the locking sleeve 230 is fixed to the coupling housing 220. Preferably, the coupling housing 220 and the locking sleeve 230 are connected to each other by a form-fitting connection. In addition, preferably, the transmission cover 210 engages form-fittingly into the locking sleeve 230.

[0066] Preferably, the transmission cover 210 is arranged at the end of the transmission housing 122 facing away from the tool receiving part 140. In the illustration, the transmission cover 210 has a disc-shaped base body including a central support flange 216, a side 289 facing the drive motor 180, and a side 288 facing the tool receiving part 140. The transmission cover 210 preferably has at least two, four in the illustration, connecting sections 214 on its outer circumference. Here, the four connecting sections 214 approximately form a rectangle. Preferably, each connecting section 214 is provided with screw hubs 291, 292, 293, 294.

[0067] According to one embodiment, the transmission cover 210 is fixed to the side of the coupling housing 220 facing the drive motor 180. Preferably, the transmission cover 210 is fixed to the coupling housing 220 by a threaded connection 250 using at least one threaded part 251. In the illustration, the transmission cover 210 is fixed to the coupling housing 220 by four screw hubs 291, 292, 293, 294 by means of four assigned threaded parts 251. Here, the threaded part 251 loads the transmission cover 210 in the direction of the tool receiving part 140, preferably along the axial direction 201, relative to the tool receiving part 140.

[0068] Preferably, the coupling housing 220 has connection areas 225 assigned to the connecting sections 214. Preferably, each connection area 225 has a threaded area for arranging the threaded part 251. Preferably, a threaded part 251 is assigned to each connecting section 214 or connection area 225 to form a corresponding threaded connection 250.

[0069] Furthermore, the transmission cover 210 preferably forms a hollow wheel 212 of the transmission 120 on its side 288 facing the tool receiving part 140. Preferably, the hollow wheel 212 is integrally formed with the transmission cover 210. However, the hollow wheel 212 can also be fixed to the transmission cover 210 in a fixed or releasable manner by any connection.

[0070] Preferably, a switching element 240 for switching between at least two different gear positions ( Figure 16 1598, 1599 in this case) is assigned to the transmission 120. The switching element 240 can be arranged in switching positions 205, 206 assigned to the respective gear positions ( Figure 16 1598, 1599 in this case). Preferably, the switching element 240 can be arranged in the switching position 205 on the right in the figure and the switching position 206 on the left in the figure. In the right switching position 205, the switching hollow wheel ( Figure 3 320 in this case) assigned to the switching element 240 is arranged in the illustrative left position or the first gear position ( Figure 16 1598 in this case); and in the left switching position 206, the switching hollow wheel (Figure 3 320) in the explanatory right position or another gear position ( Figure 16 1599) in. Preferably, the transmission 120 forms a cross-sectional plane perpendicular to the axis of rotation 199 at least in the right switching position 205 of the switching element 240 ( Figure 16 1500) in. In this cross-sectional plane, the locking sleeve 230 is at least partially arranged between the transmission cover 210 and the switching element 240, and the switching element 240 is at least partially arranged between the locking sleeve 230 and the coupling housing 220.

[0071] According to one embodiment, the switching element 240 has an arcuate, preferably at least approximately U-shaped base body ( Figure 11 1010) in. The switching element 240 is preferably at least partially arranged between the coupling housing 220 and the locking sleeve 230. Here, the switching element 240 is preferably configured such that, in order to switch the transmission 120, a switching hollow wheel is loaded along the axis of rotation 199 of the tool receiving part 140 ( Figure 3 320) for gear shifting.

[0072] Preferably, the locking sleeve 230 has an assigned notch 232 for passing through the switching element 240. Preferably, the coupling housing 220 has a notch 224 formed along the axis of rotation 199 of the tool receiving part 140, through which the switching element 240 can be connected to Figure 1 the operating element 127 for operating the switching element 240.

[0073] According to one embodiment, the locking sleeve 230 has at least one axially oriented positioning tab 239 at its axial end facing the transmission cover 210 ( Figure 9 801) in, wherein the transmission cover 210 has a receiving part 219 for receiving at least one axially oriented positioning tab 239. The term "axially oriented" is understood in the context of the present invention as an orientation along the axial direction 201 or along the axis of rotation 199.

[0074] Furthermore, the locking sleeve 230 preferably has at least one support tab 296 at its axial end facing the transmission cover 210 ( Figure 9 801) in, which supports on the screw hubs 293, 294 of the transmission cover 210. Preferably, at least two support tabs 296 are provided at the axial end of the locking sleeve 230 facing the transmission cover 210 ( Figure 9 801) in, wherein the positioning tab 239 and the support tab 296 preferably form a triangular arrangement. However, it should be noted that this arrangement can also have any other shape, such as rectangular.

[0075] Furthermore, a fixing ring 260 is provided at the axial end of the locking sleeve 230 facing the tool receiving part 140 ( Figure 9 in 802). Preferably, the fixing ring 260 abuts against the locking sleeve 230 in the axial direction 201. The fixing ring 260 preferably prevents the switching hollow wheel ( Figure 3 in 320) from twisting when the switching element 240 is set in the right switching position 205, wherein the fixing or locking of the switching hollow wheel ( Figure 3 in 320) is constituted.

[0076] Furthermore, the transmission 120 is preferably configured with a disc-shaped plate 270 which prevents the planet gear carrier ( Figure 16 in 1521) assigned to the transmission 120 from moving into another hollow wheel ( Figure 16 in 1523) in the illustrated right switching position 205 of the switching element 240. Herein, the disc-shaped plate 270 is preferably supported axially, or in the axial direction 203, i.e., along the rotation axis 199, on the coupling housing 220. Furthermore, the disc-shaped plate 270 is provided at the axial end of the fixing ring 260 facing the tool receiving part 140. It should be noted here that the disc-shaped plate 270 is hereinafter simply referred to as "plate 270" for simplicity.

[0077] Preferably, the locking sleeve 230 has a first material and the fixing ring 260 has a second material which is different from the first material. Preferably, the first material is plastic and the second material is metal. By the design with the fixing ring 260 made of metal, the wear during the switching process using the switching hollow wheel ( Figure 3 in 320) can be reduced.

[0078] It should be noted here that in this specification, the term "axial" should be understood as the arrangement or orientation along the axial direction 201, i.e., along the rotation axis 199. Similarly, in this specification, the term "radial" should be understood as the arrangement or orientation along the radial direction 203, i.e., perpendicular to the rotation axis 199.

[0079] Figure 3 Shown Figure 2 is the transmission housing 122 including the coupling housing 220 and the locking sleeve 230. As described above, the locking sleeve 230 is arranged on the inner circumference 222 of the coupling housing 220 and is preferably fixed thereto.

[0080] Preferably, the transmission 120 has a switching hollow wheel 320 which can be axially moved by the switching element 240. The switching hollow wheel 320 is arranged in the inner receiving part 315 formed by the locking sleeve 230, wherein the switching hollow wheel 320 is on its outer circumference ( Figure 10preferably has a receiving groove (921) for at least partially receiving the switching element 240 on it Figure 10 in (920). In addition, Figure 3 Illustrate the planet carrier 392 configured for the switching sun gear 320, which is configured with three planet gears 390 in the illustration.

[0081] Preferably, the coupling housing 220 has at least one, four in the illustration, inwardly directed, in particular radially inwardly directed, protrusions 342 on its inner circumference 222. In the context of the present invention, the term "inwardly directed" should be understood as inwardly along Figure 2 the radial direction 203, or in the direction of the axis of rotation 199. Preferably, the protrusions 342 are at least approximately parallel to Figure 1 and Figure 2 the axis of rotation 199 of.

[0082] Similarly, the locking sleeve 230 has at least one, four in the illustration, receiving portions 317 on its outer circumference 316. Preferably, the protrusions 342 are arranged in the assigned notches 317 to form a torsional stop. Here, the locking sleeve 230 is centered on its outer circumference, or via the receiving portions 317, by the coupling housing 220 via the protrusions 342. According to an embodiment, the protrusions 342 are arranged in the connection region 225 of the coupling housing 220 and are preferably formed integrally with the connection region 225.

[0083] In addition, Figure 3 Illustrate the notch 232 configured for the switching element 240 to pass through and assigned to the locking sleeve 230. In the illustration, the locking sleeve 230 has two radially opposed notches 232 for the switching element 240 to pass through each one end ( Figure 11 1011, 1012) in. Here, one end of the switching element 240 is preferably arranged in the receiving portion, in particular the receiving groove ( Figure 10 920) in of the switching sun gear 320.

[0084] In addition, Figure 3 Illustrate the notch 224 formed on the coupling housing 220. In the illustration, the switching element 240 protrudes through the notch 224 in the upper region of the coupling housing 220. Preferably, the coupling housing 220 is configured to have the notch 224 such that the switching element 240 is at least partially, preferably completely, arranged within the transmission housing 122, in particular within the coupling housing 220. That is, the switching element 240 preferably does not protrude beyond the coupling housing 220 in the radial direction of the transmission housing 122. According to an embodiment, the switching element 240 is at least partially, preferably completely, arranged Figure 2 below the threaded connection 250 of, preferably in the same plane.

[0085] Figure 4 shows Figure 3 connector housing 220 and locking sleeve 230 and Figure 2 transmission cover 210. Herein, Figure 4 illustrates centering flange 410 provided in inner receiving portion 315 of locking sleeve 230 of transmission cover 210. Centering flange 410 is preferably formed annularly, however, it may also be formed only partially along the circumferential direction of transmission cover 210, for example, formed as an annular segment. Centering flange 410 is configured to preferably center locking sleeve 230 along Figure 2 radial direction 203.

[0086] Figure 5 shows from Figures 2 to 4 transmission housing 122, wherein connector housing 220 is shown transparently similarly to Figure 2 . Herein, Figure 5 shows the arrangement of switching element 240 in the illustrated right switching position 205 and in the illustrated left switching position 206. Exemplarily, switching element 240 is arranged facing transmission cover 210 in left switching position 206, and in right switching position 205, switching element 240 is arranged in notch 224 facing away from transmission cover 210.

[0087] Figure 6 shows Figure 4 transmission housing 122 without connector housing 220. Herein, Figure 6 illustrates the design of outer circumference 316 of locking sleeve 230. Locking sleeve 230 preferably has radially opposed deflection tabs 511, 512 formed on its outer circumference 316, which are used to deflect switching element 240 when switching from one switching position to another switching position 205, 206. Preferably, deflection tabs 511, 512 are formed by recesses 520. Preferably, switching element 240 is arranged in recesses 520. Deflection tabs 511, 512 are preferably configured as terminal stops for switching element 240 in switching positions 205, 2'06.

[0088] According to one embodiment, locking sleeve 230 has a plurality of annular extensions 530 at its axial end ([[]] Figure 9 802 in[[[]]) facing tool receiving portion 140. Preferably, the plurality of annular extensions 530 has four annular extensions 531, 532, 533([[]] Figure 12 534 in[[[]]). In addition, locking sleeve 230 is preferably formed on the inner circumference of annular extensions 531, 532, 533([[]] Figure 12 534 in[[[]]) for along[[[]] Figure 2The receiving portion 539 of the fixing ring 260 is received in the radial direction 203 (see Figure 13 ). Here, the fixing ring 260 is preferably arranged on the locking sleeve 230 such that the annular expansion portions 531, 532, 533 ( Figure 12 534 in) receive the fixing ring 260 on the peripheral side.

[0089] Furthermore, the plate 270 preferably has notches 271 on its outer circumference. Furthermore, the fixing ring preferably has tabs 265, 266, 267, 268 on its outer circumference, and first or second receiving portions 261, 262 are respectively formed between two adjacent tabs 265, 266, 267, 268. The first and second receiving portions 261, 262 are preferably configured to receive the assigned protrusions in the axial direction 201 Figure 2 . The first receiving portion 261 is preferably configured to receive the protrusions of the connector housing 220 ( Figure 8 710, 720 in), and the second receiving portion 262 is configured to receive the annular expansion portions 531, 532, 533 of the locking sleeve 230 ( Figure 12 534 in). Preferably, the first receiving portion 261 of the fixing ring 260 and the notch 271 of the plate 270 form a common receiving portion for arranging the protrusion 342 of the connector housing 220 in the axial direction 201 Figure 2 . Figure 3

[0090] Figure 7 Shows Figures 1 to 6 the transmission cover 210 of the transmission housing 122. Here, Figure 7 explains the illustrated disc-shaped base body of the transmission cover 210 including the central support flange 216 and the outer circumferential connection section 214 including the screw hubs 291 to 294. Furthermore, Figure 7 shows the idler wheel 212 formed on the transmission cover 210 opposite to the support flange 216.

[0091] Furthermore, Figure 7 explains the receiving portion 219 for receiving at least one axially oriented positioning tab 239 Figure 2 . The receiving portion 219 is arranged in the illustration above between the screw hubs 291 and 292 in Figure 7 . It should be noted here that the receiving portion 219 can also be arranged at any other position of the transmission cover 210 or between two adjacent screw hubs 291 to 294. In the illustration, the receiving portion 219 is arranged in the middle between the two screw hubs 291 and 292, but it can also be arranged eccentrically or offset.

[0092] Furthermore, Figure 7 explainsFigure 4 which can be arranged in the Figure 3 inner receiving part 315 of the locking sleeve 230, preferably an annular centering flange 410. The centering flange 410 preferably has an outer diameter smaller than that of the hollow wheel 212. In addition, the outer diameter of the centering flange 410 is preferably larger than the diameter of the central support flange 216.

[0093] Figure 8 shown Figures 1 to 6 coupling housing 220 of the transmission housing 122. Here, Figure 8 preferably two opposing notches 224 are illustrated. In addition, Figure 8 shown for partially arranging Figure 2 connecting region 225 of the threaded part 251.

[0094] Preferably, an inwardly protruding portion 342 is formed on the inner circumference 222 of the coupling housing 220 (see also Figure 3 ). The protruding portion 342 forms an extension formed along Figure 2 radial direction 203. Preferably, the protruding portion 342 is configured for Figures 2 to 6 torsion stop and / or centering of the locking sleeve 230 on the coupling housing 220. According to one embodiment, each protruding portion 342 is configured as a single-stage protruding portion 710 having a single stage 711 and / or a two-stage protruding portion 720 having a first stage 721 and a second stage 722. Here, the second stage 722 has a greater height than the first stage 721 along the radial direction 203. Preferably, the protruding portion 342 is formed on the connecting region 225. In the illustration, four protruding portions 342 are formed, where preferably, the single-stage protruding portion 710 is formed on the lower connecting region 225 shown in the illustration, and the two-stage protruding portion 720 is formed on the upper connecting region 225 shown in the illustration.

[0095] Preferably, in the assembled state of the transmission 120, each protruding portion 710, 720 is received in the notch 271 of the plate 270 and the first notch 261 of the fixing ring 260. In particular, each protruding portion 710, 720 is received in the first notch 261 of the fixing ring 260 respectively.

[0096] In addition, the coupling housing 220 preferably has a protruding edge 730 for supporting the plate 270 at least partially along the circumferential direction on its inner circumference. The protruding edge 730 preferably forms a radially inward extension.

[0097] Figure 9 shown as viewed from the first axial end 801 having its axial ends 801, 802 Figures 1 to 6 locking sleeve 230. Here, Figure 9Illustrate the preferred cylindrical or annular base body of the locking sleeve 230, which includes two radially opposed notches 232 for the switching element 240 to pass through. In addition, Figure 9 Illustrate the shown V-shaped recess 520 and the oppositely configured deflection tabs 511, 512 for deflecting the switching element 240. The deflection tabs 511, 512 preferably have at least an approximately triangular deflection profile. In the illustration, the locking sleeve 230 has two radially opposed deflection profiles, each of which includes a recess 520 and two deflection tabs 511, 512.

[0098] In addition, Figure 9 Show the positioning tab 239 and the support tabs 296 or 898, 899 provided on the axial end 801 facing the transmission cover 210. The support tabs 898, 899 are preferably diamond-shaped, but can also have any other shape, such as triangular. Similarly, Figure 9 Show the preferred triangular arrangement of the positioning tab 239 and the support tabs 898, 899. It should be noted here that this arrangement can also have any other shape, such as quadrilateral.

[0099] According to an embodiment, the locking sleeve 230 has receiving portions 317 or 810, 820 configured for Figure 8 the protruding portions 710, 720, for torsional stop and centering of the locking sleeve 230 on the coupler housing 220. The receiving portions 810, 820 are preferably formed along the axial direction 201. Preferably, the receiving portion 810 is provided in the lower part in the illustration, or in the area of the support members 898, 899, and the receiving portion 820 is provided in the upper part in the illustration, or in the area of the deflection tabs 511, 512. In particular, the receiving portion 820 is constructed above the deflection tabs 511, 512.

[0100] Preferably, a notch 232 is provided between the receiving portions 810, 820. Preferably, the receiving portion 820 has first and second segments 821, 822 along the axial direction 201. Here, the first segment 821 is configured for receiving Figure 8 the second stage 722 of the coupler housing 220, and the second segment 822 is configured for receiving Figure 8 the first stage 721 of the coupler housing 220.

[0101] In addition, Figure 9 Illustrate a plurality of annular extensions 530 formed on the second axial end 802. Preferably, receiving portions 810, 820 are respectively formed between two adjacent annular extensions 531, 532, 533 ( Figure 12 534 in

[0102] Figure 10 Show ​ The switching ring gear 320 of the transmission device 120. The switching ring gear 320 has an annular base body in the figure, which has a portion for receiving the outer circumference 921 of the base body. ​ The receiving slot 920 of the switching element 240 .

[0103] Furthermore, the switching ring gear 320 has, for example, another toothing 930 on its outer circumference 921. Here, the toothing 930 is preferably designed as a rotation securing device for the switching ring gear 320. Furthermore, the switching ring gear 320 has a toothing 913 on its inner circumference 911. ​ and ​ The planet gears 390 of the planet gear carrier 392 roll along this tooth portion.

[0104] ​ Show ​ The switching element 240 of the transmission 120 is shown in FIG. The switching element 240 has an arcuate, preferably at least approximately U-shaped base body 1010. The base body 1010 preferably has two ends 1011, 1012, which point inwards. Preferably, the ends 1011, 1012 are arranged in the assembled state of the transmission 120. ​ In the receiving groove 920 of the switching ring gear 320.

[0105] ​ Shown is a diagram viewed from the second axial end 802. ​ The locking sleeve 230. Here, ​ The plurality of annular expansions 530 provided on the second axial end 802 are illustrated. Four annular expansions 531-534 are shown, but there may be more or fewer than four annular expansions 531-534. In particular, the annular expansions 532, 534 are preferably each provided in the region of the notch 232.

[0106] also, ​ Clarify the use of ​ The receiving portion 539 of the fixing ring 260 is received in the radial direction 203. In addition, ​ The receptacles 810 , 820 are explained, in particular the receptacle 820 having the first and second sections 821 , 822 .

[0107] ​ Shown with ​ 、 ​ and ​ The fixing ring 260, ​ The locking sleeve 230. The fixing ring 260—as described above—has webs 265, 266, 267, 268 on its outer circumference and an internal toothing 1110 on its inner circumference.​ The outer tooth part 930 of the switching hollow wheel 320 preferably forms a form-fit with the inner tooth part 1110 of the fixed ring 260.

[0108] In the illustration, the fixed ring 260 is arranged in the receiving part 539. Here, the fixed ring 260 preferably does not protrude beyond the locking sleeve 230 in the ​ axial direction 201. The fixed ring 260 is mirror-symmetrically configured and has tabs 265 - 268 on its right and left semi-circumferences as illustrated. An annular extension 531 is preferably provided between the two tabs 265; an annular extension 533 is preferably provided between the two tabs 268; and an annular extension 532 is provided on the left side and an annular extension 534 is provided on the right side in the illustration between the tabs 266 and 267. The annular extensions 531 - 534 are preferably each arranged in the receiving part 262 of the fixed ring 260. In addition, receiving parts 261 for arranging the ​ projections 710, 720 of the coupling housing 220 are preferably formed between the tabs 265, 266 and 267, 268 respectively.

[0109] ​ The illustration shows the arrangement of the fixed ring 260 in the ​ transmission device 120. Here, the projections 710, 720 of the coupling housing 220 are received in the first receiving part 261 of the fixed ring 260, and the annular extensions 531 - 534 of the coupling housing 220 are arranged in the second receiving part 262 of the fixed ring 260. Thereby, torsional stop and / or torque support can be achieved. In addition, ​ the outer tooth part 930 of the switching hollow wheel 320 is illustrated, which forms a form-fit with the inner tooth part 1110 of the fixed ring 260.

[0110] ​ The illustration shows ​ the arrangement of the plate 270 in the coupling housing 220. Here, the projections 710, 720 of the coupling housing 220 are preferably received in the notches 271 of the plate 270 for torsional stop. The plate 270 is preferably configured in particular to prevent leakage of lubricant between the transmission gear positions of the transmission device 120.

[0111] ​ The illustration shows ​ the transmission device 120 arranged in the transmission housing 122. Here, ​Illustrate a cross-sectional plane 1500 that is arranged perpendicular to the axis of rotation 199 at least in the first or right switching position 205. In the illustration, the cross-sectional plane 1500 is arranged in the axial direction 201 at the height of the hollow wheel 212 of the transmission cover 210. In the cross-sectional plane 1500, preferably, the locking sleeve 230 is arranged at least in regions between the transmission cover 210 and the switching element 240. Furthermore, in the cross-sectional plane 1500, preferably, the switching element 240 is arranged at least in regions between the locking sleeve 230 and the coupling housing 220. In other words, at least in the cross-sectional plane 1500, the transmission cover 210 is arranged first radially outward from the axis of rotation 199, followed by the locking sleeve 230 and then the coupling housing 220, wherein the switching element 240 is preferably arranged between the locking sleeve 230 and the coupling housing 220.

[0112] Furthermore, ​ Illustrate the centering of the locking sleeve 230 by the centering flange 410 of the transmission cover 210. Here, the centering flange 410 is arranged in the inner receiving portion 315 of the locking sleeve 230. Furthermore ​ Illustrate the arrangement of the fixing ring 260 in the receiving portion 539 of the locking sleeve 230, wherein the fixing ring 260 is arranged on the locking sleeve 230 such that the annular extensions 531 - 534 receive the fixing ring 260 on the circumferential side.

[0113] Similarly, ​ Show the arrangement of the plate 270 on the coupling housing 220. Here, the plate 270 is arranged at the axial end of the fixing ring 260 facing the tool receiving portion 140. In particular, the plate 270 abuts against the axial end 802 of the coupling housing 220 facing the tool receiving portion 140. Here, the plate 270 is supported on the protruding edge 730 of the coupling housing 220 in the direction of the tool receiving portion 140.

[0114] According to one embodiment, the transmission 120 is configured in the manner of a planetary transmission and has at least one hollow wheel 1523, at least one planetary gear carrier 1521, and at least one planetary gear 1522. Between at least one planetary gear carrier 1521 and at least one planetary gear 1522, a plate 270 is provided in the illustration. Here, the plate 270 prevents the planetary gear carrier 1521 from moving or moving into the hollow wheel 1523 in the first switching position 205 of the switching element 240.

[0115] Preferably, the switching element 240 is configured with at least two different gear positions 1598, 1599, wherein the switching element 240 is arranged in ​in the right or left switching positions 205, 206 assigned to gears 1598, 1599. In the right switching position 205 of the switching element 240, the switching hollow wheel 320 is arranged in the left position shown or in the first gear 1598; and in the left switching position 206 of the switching element 240, the switching hollow wheel 320 is arranged in the right position shown or in the other gear 1599.

[0116] In addition, ​ the protective sleeve 196 assigned to the tool receptacle 140 is illustrated. In addition, ​ an exemplary structure of a torque setting device including a torque setting sleeve 197 is shown.

Claims

1. A hand-held power tool (100), comprising a drive unit (125) for rotationally driving a tool receptacle (140) about an assigned rotational axis (199), wherein the drive unit (125) has at least one drive motor (180) and a switchable transmission (120), wherein the switchable transmission (120) is arranged in a transmission housing (122), which transmission housing comprises at least partially a sleeve-shaped coupling housing (220) and a transmission cover (210) fixed thereto, wherein a switching element (240) is provided for switching the switchable transmission (120) between at least two different gears (1598, 1599), wherein a locking sleeve (230) for locking the switching element (240) in at least one first switching position and a second switching position (205, 206) is arranged in the coupling housing (220), characterized in that The switchable transmission device (120) forms a cross-sectional plane (1500) perpendicular to the axis of rotation (199) at least in a first switching position (205) of the switching element (240). In this cross-sectional plane, the locking sleeve (230) is arranged at least in regions between the transmission cover (210) and the switching element (240), and the switching element (240) is arranged at least in regions between the locking sleeve (230) and the coupling housing (220).

2. The hand-held power tool according to claim 1, characterized in that, The switchable transmission device (120) has a switching hollow wheel (320) that can be axially moved by the switching element (240). The switching hollow wheel is arranged in an inner receiving portion (315) formed by the locking sleeve (230), wherein the switching hollow wheel (320) has a receiving groove (920) on its outer circumference (921) for at least partially receiving the switching element (240).

3. The hand-held power tool according to claim 2, characterized in that, The transmission cover (210) has an annular centering flange (410) arranged in the inner receiving portion (315) of the locking sleeve (230) for centering the locking sleeve (230) in the radial direction (203).

4. The hand-held power tool according to one of the above claims, characterized in that, The transmission cover (210) engages form-fittingly into the locking sleeve (230).

5. The hand-held power tool according to claim 4, characterized in that, The locking sleeve (230) has at least one axially oriented positioning tab (239) at its axially facing end (801) towards the transmission cover (210), wherein the transmission cover (210) has a receiving portion (219) for receiving the at least one axially oriented positioning tab (239).

6. The hand-held power tool according to one of the preceding claims, characterized in that, The locking sleeve (230) has at least one support tab (898, 899) at its axially facing end (801) towards the transmission cover (210), and the support tab supports on the thread hubs (293, 294) of the transmission cover (210).

7. The hand-held power tool according to claim 5 or 6, characterized in that, At least two support tabs (898, 899) are arranged at the axially facing end (801) of the locking sleeve (230) towards the transmission cover (210), and the positioning tab (239) and the support tabs (898, 899) preferably form a triangular arrangement.

8. The hand-held power tool according to one of the preceding claims, characterized in that, The transmission cover (210) forms a hollow wheel (212) of the switchable transmission device (120) on its side (288) facing the tool receiving portion (140).

9. The hand-held power tool according to one of the preceding claims, characterized in that, The coupling housing (220) has at least one inwardly protruding portion (342) on its inner circumference (222), and the locking sleeve (230) has at least one receiving portion (317) on its outer circumference (316), wherein the at least one protruding portion (342) is arranged in the at least one receiving portion (317).

10. The hand-held power tool according to claim 9, characterized in that, The at least one protruding portion (342) is arranged parallel to the axis of rotation (199).

11. The hand-held power tool according to claim 9 or 10, characterized in that, A plurality of protrusions (342) are configured as single - stage protrusions (710) having a single stage (711) and / or two - stage protrusions (720) having a first stage (721) and a second stage (722), wherein the second stage (722) has a greater height in the radial direction (203) than the first stage (721).

12. The hand-held power tool according to claim 11, characterized in that, The locking sleeve (230) has receiving portions (810, 820) configured for the protrusions (710, 720) for torsional stopping and centering of the locking sleeve (230) on the coupling housing (220).

13. The hand-held power tool according to one of the preceding claims, characterized in that, A fixing ring (260) is arranged on the axial end (802) of the locking sleeve (230) facing the tool receiving portion (140), wherein the fixing ring (260) prevents the switching hollow wheel (320) from rotating when the switching element (240) is arranged in the first switching position (205).

14. The hand-held power tool according to claim 13, characterized in that, The locking sleeve (230) has annular extensions (531, 532, 533, 534), and the fixing ring (260) is arranged on the locking sleeve (230) such that the annular extensions (531 - 534) receive the fixing ring (260) on the circumferential side.

15. The hand-held power tool according to one of the preceding claims, characterized in that, The coupling housing (220) has a notch (224) formed along the rotation axis (199) of the tool receiving portion (140), through which the switching element (240) is connected to an operating element (127) for operating the switching element (2).

Images