Bottom bracket with a gearbox for a bicycle, bicycle with a bottom bracket

Abstract

Bottom bracket with a gearbox (1) for a bicycle and a bottom bracket crankshaft (25), wherein a gearbox input shaft (4) is non-rotatably connected to the bottom bracket crankshaft (25), comprising at least one switching element and a sleeve (3) which encloses the at least one switching element and is mechanically connected to the switching element in such a way that a rotational movement of the sleeve (3) results in a linear movement of the at least one switching element, characterized in that the at least one switching element is arranged within the cavity enclosed by the sleeve (3), wherein the at least one switching element allows a relative movement between two components in a first actuation state and establishes a connection for the transmission of a torque between the two components in a further actuation state.

Description

[0001] The invention relates to a bottom bracket with a gearbox. Furthermore, the invention relates to a bicycle with a gearbox or a bottom bracket.

[0002] Numerous bottom bracket gearboxes are known from the prior art, featuring multiple shifting elements and planetary gear sets. In these known bottom bracket gearboxes, actuating the shifting elements is often only achievable with a complex design. The size of the bottom bracket gearbox increases with the number of shifting elements and / or planetary gear sets.

[0003] WO 98 / 029 296 A1 discloses a device for actuating a shifting axle operatively connected to a switchable bottom bracket gearbox.

[0004] DE 102 579 73 B3 discloses a manual transmission and a vehicle with such a manual transmission.

[0005] DE 197 207 94 A1 reveals a multi-speed gearbox hub.

[0006] EP 2 028 096 A1 reveals a multi-start epicyclic gear hub.

[0007] The subsequently published document DE 10 2016 207 035 A1 discloses a drive arrangement and a vehicle.

[0008] DE 10 2014 101 726 A1 discloses a load-shiftable multi-speed planetary gearbox.

[0009] The object of the invention is to provide a transmission in which a large number of switching elements can be actuated and which is compact in design.

[0010] The problem is solved by all the subject matter of the independent patent claims.

[0011] The problem is solved by a bottom bracket with a gearbox for a bicycle and a bottom bracket crankshaft, wherein a gearbox input shaft is non-rotatably connected to the bottom bracket crankshaft, wherein at least one switching element and a sleeve that encloses the at least one switching element and is mechanically connected to the switching element such that a rotational movement of the sleeve results in a linear movement of the at least one switching element. The at least one switching element is arranged within the cavity enclosed by the sleeve. In a first actuation state, the at least one switching element allows relative movement between two components and, in a further actuation state, establishes a connection for the transmission of a torque between the two components.

[0012] Alternatively, the problem is solved by a bottom bracket with a gearbox for a bicycle and a bottom bracket crankshaft, wherein a gearbox input shaft is non-rotatably connected to the bottom bracket crankshaft, wherein at least one switching element and a sleeve that encloses the at least one switching element and is mechanically connected to the switching element such that a rotational movement of the sleeve results in a linear movement of the at least one switching element. Several switching elements are arranged within the sleeve.

[0013] In the transmission according to the invention, it was found that a compact transmission can be realized if the at least one switching element, and in particular all switching elements, are arranged inside the sleeve, in a cavity enclosed by the sleeve. Furthermore, it was found that actuation of a plurality of switching elements can be carried out in a simple manner if the rotary movement of the sleeve is converted into a linear movement of the switching element.

[0014] Depending on its actuation state, a switching element allows relative movement between two components or establishes a connection for transmitting torque between them. Relative movement can, for example, involve the rotation of two components where the rotational speed of the first component differs from that of the second. Furthermore, it is also conceivable that only one of the two components rotates while the other remains stationary or rotates in the opposite direction.

[0015] In a particular embodiment, the transmission can have a first planetary gear set, a second planetary gear set, a third planetary gear set, and a fourth planetary gear set, wherein a transmission input shaft is non-rotatably connected to a gear set element of the first planetary gear set and a gear set element of the second planetary gear set. A first shaft of the transmission is non-rotatably connected to a gear set element of the fourth planetary gear set, and a second shaft of the transmission is non-rotatably connected to another gear set element of the third planetary gear set and another gear set element of the fourth planetary gear set. A third shaft of the transmission is non-rotatably connected to another gear set element of the third planetary gear set. A fourth shaft of the transmission is non-rotatably connected to a gear set element of the third planetary gear set and to another gear set element of the fourth planetary gear set.The result is a gearbox that has at least four, in particular exactly four, planetary gear sets.

[0016] A planetary gear set comprises a sun gear, a carrier, and a ring gear. The planet gears are rotatably mounted on the carrier and mesh with the teeth of the sun gear and / or the teeth of the ring gear.

[0017] The term "shaft" does not exclusively refer to a cylindrical, rotatably mounted machine element for transmitting torques, but rather also includes general connecting elements that connect individual components, in particular connecting elements that non-rotatably join several components together.

[0018] The switching element can be a first shift sleeve that can be selectively moved into a first, second, or third switching position by means of a first actuating device. In the first switching position, the transmission input shaft can be connected to the first shaft in a rotationally fixed manner by means of the first shift sleeve. In the second switching position, another gear set element of the second planetary gear set can be connected to the first shaft in a rotationally fixed manner by means of the first shift sleeve. In the third switching position, the first shift sleeve cannot be connected to either the transmission input shaft or the other gear set element of the second planetary gear set in a rotationally fixed manner. This means that no torque is transmitted to the first shaft by means of the first shift sleeve. The result is a first shift sleeve that can be used to implement three switching positions.

[0019] The other gear set element of the second planetary gear set can be a ring gear of the second planetary gear set. The gear set element of the second gear set element can be a web, and the other gear set element of the second planetary gear set can be a sun gear.

[0020] The transmission may include a detent element that prevents the first shift sleeve from moving independently. This detent element can prevent axial movement of the first shift sleeve. Furthermore, the detent element can prevent the shift sleeve, once in the first, second, or third shift position, from moving independently to another shift position. The detent element may be designed as a clamping ring.

[0021] The directional terms "axial" and "radial" refer to a central axis of the gearbox, unless otherwise stated.

[0022] The transmission can have a first freewheel by which, in the first shift position of the first shift sleeve and in one direction of rotation of the transmission input shaft, the transmission input shaft is rotationally fixed to the first shaft. This means that the first freewheel is in a locked position in the direction of rotation of the transmission input shaft. Furthermore, the transmission can have a second freewheel by which, in the second shift position of the first shift sleeve and in one direction of rotation of the other gear set element of the second planetary gear set, the other gear set element is rotationally fixed to the first shaft. This means that the second freewheel is in a locked position in the same direction of rotation of the other gear set element of the second planetary gear set.As a result, the first freewheel and the second freewheel make it easy to ensure that torque transmission via the first shift sleeve is only transferred to the first shaft in one direction of rotation of the gearbox input shaft or the other gear set element of the second planetary gear set.

[0023] A simple design for the first freewheel can be achieved by having at least one pawl that is rigidly connected to the first shift sleeve. A rigid connection is defined as one in which the pawl is connected to the first shift sleeve in such a way that the first pawl moves together with the first shift sleeve into the respective switching position of the first shift sleeve. The connection is also designed such that the first pawl can be moved into the locked position or a release position in which no torque is transmitted via the freewheel. The freewheel can have several first pawls, in particular exactly two first pawls, which are spaced apart from each other along the circumference of the first shift sleeve.

[0024] A simple design for the second freewheel can be achieved by having at least one other first pawl that is rigidly connected to the first shift sleeve. This other first pawl can be spaced apart from the first pawl, particularly in the axial direction. The second freewheel can have several other first pawls, in particular exactly two, spaced apart from each other along the circumferential direction of the first shift sleeve.

[0025] The other gear set element of the second planetary gear set may have a projection. The projection is designed and arranged such that, in the first switching position of the first shift sleeve, the other first pawl is pressed into the release position by means of the projection. The first pawl is engaged with the first shaft. Furthermore, the projection is designed such that, in the second switching position of the first shift sleeve, the first pawl is pressed into the release position by means of the projection. The other first pawl is engaged with the first shaft. Additionally, the projection is designed and arranged such that, in the third switching position of the first shift sleeve, the first pawl and the other first pawl are each pressed into a release position by means of the projection.

[0026] The first actuating element is mechanically connected to the first shift sleeve. In particular, the first actuating element can be mechanically connected to the first shift sleeve in such a way that a linear movement of the first actuating element, especially in the axial direction, is transmitted to the first shift sleeve. The first shift sleeve moves linearly, with the linear movement of the first shift sleeve being in the same direction as the linear movement of the first actuating element. The connection between the first actuating element and the first shift sleeve can be designed such that the first shift sleeve is rotatably arranged relative to the actuating element. This is advantageous because the first shift sleeve has a different rotational speed than the first actuating element.

[0027] Furthermore, the first actuating element can extend at least partially through the gear set element of the first planetary gear set and / or the gear set element of the second planetary gear set. In particular, the first actuating element can extend at least partially through the web of the first planetary gear set and / or the web of the second planetary gear set. This achieves simple actuation of the first shift sleeve.

[0028] The first actuating element can be mechanically connected to a first pin of the actuating device. The first pin can be arranged in a first recess of the sleeve, the first recess of the sleeve serving to guide the first pin. The first pin can be arranged in the first recess such that the sleeve can rotate relative to the first pin. The first pin is guided in a longitudinal groove in the housing, preferably by means of a sliding shoe, to prevent rotation. This means that the first pin does not rotate with the sleeve when it rotates. However, the first recess is designed such that when the sleeve rotates, the first pin moves, in particular exclusively, in the axial direction. Thus, the rotational movement of the sleeve results in a linear movement of the first pin and therefore of the first actuating element.As a result, the first recess and the first pin simply convert the rotary motion of the sleeve into a linear motion of the first actuating element. The first pin is mechanically connected to the first actuating element in such a way that the first actuating element can rotate relative to the pin.

[0029] In a special embodiment, the switching element can be a second shift sleeve. This second shift sleeve can be selectively moved into either a first or a second switching position by means of the second actuating device. In the first and / or second switching position, the other gear set element of the second planetary gear set can be rotationally fixed to the second shaft by means of the second shift sleeve. The second shift sleeve moves linearly when moved into the respective switching position. The linear movement of the second shift sleeve is in the same direction as the linear movement of the second actuating device.

[0030] The transmission can have a third freewheel, by means of which, in the first shift position of the second shift sleeve and in one direction of rotation of the other gear set element of the second planetary gear set, the other gear set element is rotationally fixed to the second shaft. Furthermore, the transmission can have a fourth freewheel, by means of which, in the second shift position of the second shift sleeve and in the opposite direction of rotation of the second shaft, the other gear set element of the second planetary gear set is rotationally fixed to the second shaft. This opposite direction of rotation is the opposite of the first direction of rotation. This means that the third and fourth freewheels lock when the second shaft rotates in opposite directions.

[0031] A simple embodiment of the third freewheel can be achieved by having at least one, and in particular at least two, second pawls that are rigidly connected to the second shaft. In particular, the third freewheel can have several second pawls that are spaced apart from each other along the circumferential direction of the second shaft. The second pawl is rigidly connected to the second shaft regardless of whether it is in the release position or the locking position.

[0032] The fourth freewheel can have at least one, and in particular at least two, other second pawls that are rigidly connected to the second shaft. In particular, the fourth freewheel can have several other second pawls that are spaced apart from each other along the circumferential direction of the second shaft. The other second pawl is rigidly connected to the second shaft regardless of whether it is in the release or locking position. The other second pawls are spaced axially apart from the first two second pawls.

[0033] The fixed connection of the second and the other second pawls with the second shaft means that when the second shift sleeve is moved into the first or second shift position by means of the actuating device, the second pawl and the other second pawl do not move axially together with the second shift sleeve.

[0034] The second actuating element is mechanically connected to the second shift sleeve. The second shift sleeve is rotationally fixed to the other gear set element of the second planetary gear set.

[0035] Furthermore, the second actuating element, particularly at an end remote from the second switching sleeve, can be mechanically connected to a second pin. The second pin can be arranged in a second recess of the sleeve, with this recess serving to guide the second pin. The second pin can be positioned in the second recess such that the sleeve can rotate relative to the second pin. Like the first pin, the second pin is guided in the same longitudinal groove in the housing, preferably also via a sliding shoe, to prevent rotation. This means that the second pin does not rotate with the sleeve when it rotates. The second recess and the second pin are designed such that, when the sleeve rotates, the second pin moves, in particular exclusively, in the axial direction.Thus, the rotational movement of the sleeve results in a linear movement of the second pin and therefore of the second actuating element. As a result, the second recess and the second pin simply convert the rotational movement of the sleeve into a linear movement of the second actuating element and thus of the second shift sleeve. The second pin is mechanically connected to the second actuating element in such a way that the second actuating element can rotate relative to the pin.

[0036] In a special embodiment, the switching element can be a third shift sleeve that can be selectively moved into either a first or a second shift position by means of a third actuating device. In the first and / or second shift position, the transmission input shaft can be rotationally fixed to the second shaft by means of the third shift sleeve. In particular, the transmission input shaft can be indirectly and rotationally fixed to the third shift sleeve by means of the gear set element of the first and / or second planetary gear set. The third shift sleeve moves linearly when moved into the respective shift position. The linear movement of the third shift sleeve is in the same direction as the linear movement of the third actuating device.

[0037] The gear element of the first planetary gear set can be a carrier. The other gear element of the first planetary gear set can be a ring gear, and the remaining gear element of the first planetary gear set can be a sun gear.

[0038] The transmission can have a fifth freewheel, by means of which, in the first shift position of the third shift sleeve and in one direction of rotation of the gear set element of the first and / or second planetary gear set, the gear set element is rotationally fixed to the second shaft. Furthermore, the transmission can have a sixth freewheel, by means of which, in the second shift position of the third shift sleeve and in a different direction of rotation of the second shaft, the gear set element of the second planetary gear set is rotationally fixed to the second shaft. This other direction of rotation is opposite to the direction of rotation. This means that the fifth and sixth freewheels lock when the second shaft rotates in opposite directions.

[0039] The fifth freewheel can have at least one, and in particular several, third pawls that are rigidly connected to the second shaft. The sixth freewheel can have at least one other third pawl, and in particular several other third pawls, that are rigidly connected to the second shaft. The third pawl and the other third pawl are designed analogously to the second pawl of the third freewheel and the other second pawl of the fourth freewheel, respectively, so reference is made to the above descriptions. In addition, the third pawl and the other third pawl are arranged axially spaced from the second pawl and the other second pawl.

[0040] The third actuating element is mechanically connected to the third shift sleeve. This third actuating element is rotationally fixed to the gear set element of the first and / or second planetary gear set. The gear set element of the first and / or second planetary gear set can be a web of the respective planetary gear set.

[0041] The third actuating element can be mechanically connected to a third pin. The third pin can be arranged in a third recess of the sleeve, with the third recess serving to guide the third pin. The third pin can be arranged in the third recess such that the sleeve can rotate relative to the third pin. Like the first pin, the third pin is guided against rotation, preferably in the same longitudinal groove in the housing, also preferably by means of a sliding shoe. This means that the third pin does not rotate with the sleeve when it rotates. The third recess and the third pin are designed such that when the sleeve rotates, the third pin moves, in particular exclusively, in the axial direction. Thus, the rotational movement of the sleeve results in a linear movement of the third pin and therefore of the third actuating element.As a result, the third recess and the third pin simply convert the rotary motion of the sleeve into a linear motion of the third actuating element and thus of the third switching sleeve. The third pin is mechanically connected to the third actuating element in such a way that the third actuating element can rotate relative to the third pin.

[0042] In a special embodiment, the switching element can be a fourth shift sleeve, which can be selectively moved into either a first or a second switching position by means of a fourth actuating device. In the first and / or second switching position, the other gear set element of the first planetary gear set can be rotationally fixed to the second shaft by means of the fourth shift sleeve. The fourth shift sleeve moves linearly when moved into the respective switching position. The linear movement of the fourth shift sleeve is in the same direction as the linear movement of the fourth actuating device.

[0043] The transmission can have a seventh freewheel, by means of which, in the first shift position of the fourth shift sleeve and in one direction of rotation of the other gear set element of the first planetary gear set, the other gear set element is rotationally fixed to the second shaft. Furthermore, the transmission can have an eighth freewheel, by means of which, in the second shift position of the fourth shift sleeve and in a different direction of rotation of the second shaft, the other gear set element of the first planetary gear set is rotationally fixed to the second shaft. The opposite direction of rotation is the opposite of the first direction of rotation. This means that the seventh and eighth freewheels lock when the second shaft rotates in opposite directions.

[0044] The seventh freewheel can have at least one, and in particular several, fourth pawls that are rigidly connected to the second shaft. The eighth freewheel can have at least one, and in particular several, other fourth pawls that are rigidly connected to the second shaft. The fourth pawl and the other fourth pawl are designed analogously to the second pawl of the third freewheel and the other second pawl of the fourth freewheel, so reference is made to the above descriptions. In addition, the fourth pawl and the other fourth pawl are arranged axially spaced from the third pawl and the other third pawl.

[0045] The fourth actuating element is mechanically connected to the fourth shift sleeve. This fourth actuating element can be rotationally fixed to the fourth shift sleeve. Furthermore, the fourth actuating element can be rotationally fixed to the other gear set element of the first planetary gear set.

[0046] The fourth actuating element can be mechanically connected to a fourth pin. The fourth pin can be arranged in a fourth recess of the sleeve, with the fourth recess serving to guide the fourth pin. The fourth pin can be arranged in the fourth recess such that the sleeve can rotate relative to the fourth pin. Like the first pin, the fourth pin is preferably guided in the same longitudinal groove in the housing, also preferably by means of a sliding shoe, and thus secured against rotation. This means that the fourth pin does not rotate with the sleeve when it rotates. The fourth recess and the fourth pin are designed such that when the sleeve rotates, the fourth pin moves, in particular exclusively, in the axial direction. Thus, the rotational movement of the sleeve results in a linear movement of the fourth pin and therefore of the fourth actuating element and consequently of the fourth switching sleeve.As a result, the fourth recess and the fourth pin simply convert the rotary motion of the sleeve into a linear motion of the fourth actuating element. The fourth pin is connected to the fourth actuating element in such a way that the fourth actuating element can rotate relative to the fourth pin.

[0047] In a special embodiment, the switching element can be a fifth shift sleeve that can be selectively moved into either a neutral position or a switching position in which the other gear set element of the first planetary gear set is rotationally fixed to the third shaft by means of the fifth shift sleeve. In the neutral position, no torque is transmitted from the gear set element of the first planetary gear set to the third shaft via the fifth shift sleeve. The fifth shift sleeve moves linearly when moved into the respective switching position.

[0048] The transmission can have a ninth freewheel by means of which, when the fifth shift sleeve is in the engaged position and the other gear set element of the first planetary gear set is rotating in one direction, the other gear set element is non-rotatably connected to the third shaft. When the other gear set element rotates in the opposite direction, the ninth freewheel rotates freely. The freewheel can have at least one fifth pawl, and in particular several fifth pawls, which are rigidly connected to the third shaft and / or which are spaced apart from each other along the circumferential direction of the third shaft.

[0049] The fifth shift sleeve can be non-rotatably connected to the other gear set element of the first planetary gear set. In particular, the fifth shift sleeve can be non-rotatably connected to the fourth shift sleeve, preferably directly. The fifth shift sleeve can also be drive-wise connected to a fifth pin.

[0050] In particular, the fifth switching sleeve can have a receptacle for receiving the fifth pin. The fifth pin can be arranged in a fifth recess of the sleeve, with the fifth recess of the sleeve serving to guide the fifth pin. The fifth pin can be arranged in the fifth recess such that the sleeve can rotate relative to the fifth pin. Like the first pin, the fifth pin is guided against rotation, preferably in the same longitudinal groove in the housing, also preferably by means of a sliding shoe. This means that the fifth pin does not rotate with the sleeve when it rotates. The fifth recess and the fifth pin are designed such that when the sleeve rotates, the fifth pin moves, in particular exclusively, in the axial direction. Thus, the rotational movement of the sleeve results in a linear movement of the fifth pin and therefore of the fifth switching sleeve.As a result, the fifth recess and the fifth pin convert the rotary motion of the sleeve into a linear motion of the fifth switching sleeve in a simple manner. The fifth pin is connected to the fifth switching sleeve in such a way that the fifth switching sleeve can rotate relative to the fifth pin.

[0051] The gearbox can also have a tenth freewheel, by means of which the third shaft, particularly in one direction of rotation of the third shaft, can be connected to a housing in a rotationally fixed manner. In the opposite direction of rotation of the third shaft, the tenth freewheel rotates freely. The housing can be a gearbox housing or a bottom bracket housing. In particular, the housing does not rotate during operation of the gearbox. The gearbox can be arranged in a cavity of the bottom bracket housing. Furthermore, the gearbox can have at least 11, and in particular exactly 15, gears, each with a different gear ratio between the gearbox input shaft and the gearbox output shaft.

[0052] Furthermore, a bicycle with a bottom bracket is advantageous.

[0053] The invention is schematically represented in the figures, with identical or equivalent elements generally being designated with the same reference numerals. This shows: Fig. 1 a switching diagram of a bottom bracket gearbox according to the invention, Fig. 2 a sectional view of the bottom bracket gear according to the invention, Fig. 3 a section view along line DD from Fig. 2, Fig. 4 a section view along line EE from Fig. 2, Fig. 5a a gearbox cutout at a first shift position of the first shift sleeve, Fig. 5b a gearbox cutout at a third shift position of the first shift sleeve, Fig. 5c a gearbox cutout at a second shift position of the first shift sleeve, Fig. 6 a sectional view along line AA from Fig. 2, Fig. 7 a perspective view of a gear section, Fig. 8 a perspective view of part of the sleeve with several actuating devices, Fig. 9 a sectional view of the transmission according to the invention when the second shift sleeve is actuated, Fig. 10 a sectional view of the transmission according to the invention when the third shift sleeve is actuated, Fig. 11 a sectional view of the transmission according to the invention when the fourth shift sleeve is actuated Fig. 12 a sectional view along line BB from Fig. 11, Fig. 13 a section view along line CC from Fig. 11, Fig. 14 a sectional view along line MM from Fig. 11, Fig. 15 a side view of the sleeve showing the components necessary for sleeve actuation.

[0054] The in Fig. The gearbox shown in 1 has a first planetary gear set PS1, a second planetary gear set PS2, a third planetary gear set PS3, and a fourth planetary gear set PS4. The third planetary gear set PS3 and the fourth planetary gear set PS4 form a main gear set HR. The main gear set HR has a first shaft W1, a second shaft W2, a third shaft W3, and a fourth shaft W4.

[0055] Furthermore, the gearbox 1 has five switching elements in the form of which are described in more detail below and in Fig. The transmission 1 comprises shift sleeves S1-S5 (not shown). In particular, the transmission 1 has a first shift sleeve S1, which can assume a first shift position D, a second shift position E, or a third shift position (not shown); a second shift sleeve S2, which can assume a first shift position Bz or a second shift position Bs; a third shift sleeve S3, which can assume a first shift position Cz or a second shift position Cs; a fourth shift sleeve S4, which can assume a first shift position Mz or a second shift position Ms; and a fifth shift sleeve S5, which can assume a shift position A or a neutral position (not shown).

[0056] Furthermore, the gearbox 1 has ten freewheels, namely a first freewheel F1, a second freewheel F2, a third freewheel F3, a fourth freewheel F4, a fifth freewheel F5, a sixth freewheel F6, a seventh freewheel F7, an eighth freewheel F8, a ninth freewheel 9, and a tenth freewheel F10. A gearbox input shaft 4 of the gearbox 1 is non-rotatably connected to a bottom bracket crankshaft 25. The bottom bracket crankshaft 25 has a pedal at each of its two ends.

[0057] The first freewheel F1 has at least two first pawls 5, and the second freewheel F2 has at least two other first pawls 6. The first pawls 5 and the other first pawls 6 are rigidly connected to the first shift sleeve S1. The third freewheel F3 has at least two second pawls, the fourth freewheel F4 has at least two other second pawls, the fifth freewheel F5 has at least two third pawls, the sixth freewheel F6 has at least two other third pawls, the seventh freewheel F7 has at least two fourth pawls 11, and the eighth freewheel has at least two other fourth pawls 12. The pawls of the third to eighth freewheels F3-F8 are each rigidly connected to the second shaft W2 and in Fig. 1 not shown. The ninth freewheel F9 has two fifth pawls that are rigidly connected to the third shaft W3 and are in Fig. 1 is not shown.

[0058] In Fig. Figure 1 shows only the upper part of the gearbox 1. The planetary gear sets PS1, PS2, PS3, PS4 are arranged coaxially to the bottom bracket crankshaft 25.

[0059] A sun gear of the first planetary gear set PS1 is non-rotatably connected to a housing G. A web of the first planetary gear set PS1 is non-rotatably connected to the transmission input shaft 4. A ring gear of the first planetary gear set PS1 can be non-rotatably connected to the second shaft W2 by means of the fourth shift sleeve S4. In the first shift position Mz of the fourth shift sleeve S4, the ring gear of the first planetary gear set PS1 can be non-rotatably connected to the second shaft W2 by means of the seventh freewheel F7. In the second shift position Ms of the fourth shift sleeve S4, the ring gear of the first planetary gear set PS1 can be non-rotatably connected to the second shaft W2 by means of the eighth freewheel F8. The seventh freewheel F7 and the eighth freewheel F8 are designed such that they lock the second shaft W2 in different directions of rotation.Furthermore, the ring gear of the first planetary gear set PS1 can be connected to the third shaft W3 in a rotationally fixed manner by means of the fifth shift sleeve S5 and the ninth freewheel F9.

[0060] The transmission input shaft 4 is non-rotatably connected to the second shaft W2 by means of the web of the first and second planetary gear sets PS1 and PS2 and by means of the third shift sleeve S3. In particular, the transmission input shaft 4 is non-rotatably connected to the second shaft W2 by means of the fifth freewheel F5 when the third shift sleeve S3 is in the first shift position Cz. The transmission input shaft 4 is non-rotatably connected to the second shaft W2 by means of the sixth freewheel F6 when the third shift sleeve S3 is in the second shift position Cs. The fifth freewheel F5 and the sixth freewheel F6 are designed such that they lock the second shaft W2 in opposite directions of rotation.

[0061] The sun gear of the second planetary gear set PS2 is non-rotatably connected to the housing G. The ring gear of the second planetary gear set PS2 can be non-rotatably connected to the second shaft W2 by means of the second shift sleeve S2. In particular, the ring gear of the second planetary gear set PS2 can be connected to the second shaft W2 by means of the third freewheel F3 when the second shift sleeve S2 is in the first shift position Bz. Furthermore, the ring gear of the second planetary gear set PS2 can be connected to the second shaft W2 by means of the fourth freewheel F4 when the second shift sleeve S2 is in the second shift position Bs. In addition, the ring gear of the second planetary gear set PS2 can be non-rotatably connected to the first shaft W1 by means of the first shift sleeve S1.In particular, the ring gear of the second planetary gear set PS2 can be connected to the first shaft W1 in a rotationally fixed manner by means of the second freewheel F2 when the first shift sleeve S1 is arranged in the second shift position E.

[0062] The transmission input shaft 4 can be connected to the first shaft W1 in a rotationally fixed manner by means of the first shift sleeve S1. In particular, the transmission input shaft 4 can be connected to the first shaft W1 in a rotationally fixed manner by means of the first freewheel F1 when the first shift sleeve S1 is arranged in the first shift position D.

[0063] The third planetary gear set PS3 and the fourth planetary gear set PS4 are arranged and operatively connected such that the main gear set HR is designed as a Simpson gear set. A sun gear of the third planetary gear set PS3 is non-rotatably connected to the second shaft W2. A web of the third planetary gear set PS3 is non-rotatably connected to the fourth shaft W4. A ring gear of the third planetary gear set PS3 is non-rotatably connected to the third shaft W3. The third shaft W3 can be non-rotatably connected to the housing G by means of a tenth freewheel F10. However, the main gear set HR is not limited to the design as a Simpson gear set.

[0064] A sun gear of the fourth planetary gear set PS4 is non-rotatably connected to the second shaft W2. The sun gear of the fourth planetary gear set PS4 is non-rotatably connected to the sun gear of the third planetary gear set PS3 via the second shaft W2. A carrier of the fourth planetary gear set PS4 is non-rotatably connected to the first shaft W1. A ring gear of the fourth planetary gear set PS4 is non-rotatably connected to the fourth shaft W4. The ring gear of the fourth planetary gear set PS4 is non-rotatably connected to the carrier of the third planetary gear set PS3 via the fourth shaft W4. The fourth shaft W4 can be a transmission output shaft.

[0065] Fig. Figure 2 shows a sectional view of a lower part of the transmission 1 according to the invention. In particular, it shows Fig. 2 the constructive implementation of the in Fig. The gearbox 1 shown in Figure 1 has a sleeve 3 that encloses the first to fifth shift sleeves S1 to S5. Furthermore, the gearbox 1 has a first actuating element 8 that is mechanically connected to the sleeve 3 and the first shift sleeve S1.

[0066] The first actuating element 8 is designed to convert a rotary movement of the sleeve 3 into a linear movement of the first switching sleeve S1. The first actuating element 8 is mechanically connected to the first switching sleeve S1 at one end. Specifically, the connection between the first actuating element 8 and the first switching sleeve S1 is such that relative rotation of the first switching sleeve S1 with respect to the first actuating element 8 is possible. The first actuating element 8 moves the first switching sleeve S1 into different switching positions.

[0067] The drive connection between the first actuating element 8 and the first switching sleeve S1 is achieved by a head 26 of the first actuating element 8, which is located at the end of the first actuating element 8 facing the first switching sleeve S1. When the first switching sleeve S1 is displaced, the head 26 presses against the first switching sleeve S1. Furthermore, a first ring 27 is provided, which can be brought into contact with the head 26 of the first switching sleeve S1. Additionally, a first thrust washer 28 is provided, which is arranged axially adjacent to the first ring 27 and the head 26 of the first actuating element 8. A first snap ring 29 fixes the first thrust washer 28 and the first ring 27 axially to the first switching sleeve S1.

[0068] Part of the first actuating element 8 extends through the web of the first planetary gear set PS1 and the web of the second planetary gear set PS2. Furthermore, the first actuating element 8 is mechanically connected at an end remote from the first shift sleeve S1 to a first pin 9. The first actuating element 8 has a receptacle for receiving the first pin 9. The first actuating element 8 is connected to the first pin 9 in such a way that it can rotate relative to the pin 9. The first pin 9 is arranged in a first recess 10 of the sleeve 3.

[0069] The first actuating element 8 essentially comprises three sections: a receiving section 30 for receiving the pin 9, a radial section 31 connected to the receiving section 30, and a sliding section 32, which extends through the web of the first planetary gear set PS1 and the second planetary gear set PS2 and is mechanically connected to the first shift sleeve S1, as explained above. The head 26 is part of the sliding section 32, and the head 26 has a larger cross-section than the rest of the sliding section 32.

[0070] The radial section 31 is integrally connected to the receiving section 30 and extends radially from the receiving section 30 to the central axis M of the transmission 1. The sliding section 32 and the radial section 31 are each made of two parts, with the sliding section 32 and the radial section 31 being connected to each other in such a way that relative movement of the two sections in the axial direction is not possible. A second snap ring 33 may be present, which secures the radial section 31 to the sliding section 32 in the axial direction. The sliding section 32 extends through the web of the first and second planetary gear sets PS1 and PS2.

[0071] The receiving section 30 has a recess for receiving the first pin 9. A receiving ring 34 for receiving the first pin 9 is arranged in the recess. In addition, two thrust washers 35 are arranged in the recess.

[0072] Fig. Figure 3 shows a cross-sectional view along line DD. Fig. 2. As from Fig. As can be seen in Figure 3, two first latches 5 are rigidly connected to the first switching sleeve S1. The connection of the first latches 5 to the first switching sleeve S1 is such that the first latch 5 can rotate relative to the first switching sleeve S1. In particular, the first latches 5 can be inserted into the Fig. The locking position shown in section 3 can be rotated. The first two pawls 5 form the first freewheel F1.

[0073] Fig. Figure 3 also shows a state in which the first shift sleeve S1 is in the first shift position D. In this state, the first pawl 5 engages in a recess 37 of the transmission input shaft 4, thus creating a rotationally fixed connection between the transmission input shaft 4 and the first shift sleeve S1 in one direction of rotation of the transmission input shaft 4. Furthermore, the first shift sleeve S1 is rotationally fixed to the first shaft W1 by means of a toothed connection 38. This means that the transmission input shaft 4 is rotationally fixed to the first shaft W1 by means of the first shift sleeve S1.

[0074] Fig. 4 shows a cross-sectional view along line EE from Fig. 2. As from Fig. As can be seen in Figure 4, two other first latches 6 are rigidly connected to the first switching sleeve S1. The connection of the other first latches 6 to the first switching sleeve S1 is such that the other first latches 6 can rotate relative to the first switching sleeve S1. In particular, the other first latches 6 can be moved into the Fig. The freewheel position shown in section 4 can be rotated. In the freewheel position, there is no rotationally fixed connection between the first shift sleeve S1 and the ring gear 41 of the second planetary gear set PS2.

[0075] The other first pawls 6 form the second freewheel F2 and are spaced apart from each other along the circumferential direction of the first shift sleeve S1. Furthermore, the other first pawls 6 are, as shown from Fig. As can be seen in Figure 2, the first pawls 5 are arranged axially spaced apart. Furthermore, the other first pawls 6 are arranged offset from the first pawls 5 along the circumferential direction of the first switching sleeve S1.

[0076] The Fig. Figures 5a to c show a section of the gearbox with different shift positions of the first shift sleeve S1. The figures shown are... Fig. Figures 5a to 5c, relating to a central axis M of the gearbox 1, show both an upper section and a lower section of the gearbox 1. Fig. 5a the first shift sleeve S1, which is in the first shift position D. In the first shift position D, the first shift sleeve S1 is non-rotatably connected to the transmission input shaft 4 by means of the first freewheel F1.

[0077] The gearbox 1 has a detent element 39 which prevents the first shift sleeve S1 from moving to a different shift position on its own. Thus, the detent element 39 serves to fix the first shift sleeve S1 in the axial direction. The first shaft W1 has several, in particular exactly three, recesses 40 in which the detent element 39 can be inserted to fix the first shift sleeve S1. The detent element 39 can be designed as a snap ring. The recesses 40 are arranged in the teeth of the first shaft W1.

[0078] Furthermore, the ring gear 41 of the second planetary gear set RS2 has a projection 7. The projection 7 is designed and arranged such that, in the first switching position D of the first shift sleeve S1, the other first pawls 6 are engaged by means of the projection 7 in the Fig. The release position shown in section 4 must be pressed.

[0079] Starting from the in Fig. In the first switching position D shown in 5a, the first switching sleeve S1 is moved axially into the position shown in the first actuating element 8. Fig. The third switching position shown in Figure 5b is shifted. In the third switching position, both the first pawls 5 and the other first pawls 6 are pressed into the release position by means of the projection 7, so that no torque can be transmitted to the first shaft W1 via the first switching sleeve S1. The projection 7 is axially wide enough to press both the first pawls 5 and the other first pawls 6 into the release position by means of the projection 7.

[0080] With a further axial displacement of the first switching sleeve S1 into the Fig. In the second switching position E shown in Figure 5c, the first switching sleeve S1 is moved axially to such an extent that the other first pawls 6 are no longer pressed into the release position by the projection 7. The other first pawls 6 engage in recesses of the ring gear 41 of the second planetary gear set PS2 to create the rotationally fixed connection, while the first pawls 5 are still held in the release position by the projection 7.

[0081] Fig. Figure 6 shows a sectional view along line AA. Fig. 2. As from Fig. Once part 6 is removable, sleeve 3 is completely closed. Furthermore, it is made of Fig. Figure 6 shows that several first pins 9 are present, spaced apart from each other along the circumferential direction of the sleeve 3. These several first pins 9 are each guided in a longitudinal groove 49 in the housing G by means of a sliding shoe 50 to prevent rotation. The sleeve 3 is enclosed by the housing G. A small gap exists in the radial direction between the sleeve 3 and the housing G.

[0082] Fig. Figure 7 shows a perspective sectional view of the gearbox 1. In particular, it is evident from Fig. As can be seen from Figure 7, the sleeve 3 is arranged inside the housing G and has several recesses spaced apart from each other in the axial direction, into which the respective pins are inserted. The sleeve 3 serves to guide the pins arranged in the recesses and is rotatably designed. The recesses are designed such that their axial orientation changes along the circumferential direction of the sleeve 3. The orientation of the recesses is chosen such that, depending on the rotation angle of the sleeve 3, at least one pin can be moved in the axial direction, and thus at least one switching sleeve is moved linearly. The pins do not rotate with the sleeve 3, but are only designed to be movable in the axial direction. This means that when the sleeve 3 is rotated, the first pin 9, for example, is displaced in the axial direction due to the orientation of the recesses.As a result of the axial displacement of the first pin 9, the first actuating element 8 is also displaced in the axial direction. A force is exerted on the first switching sleeve S1 by means of the head 26 of the first actuating element 8, causing the first switching sleeve S1 to be displaced in the axial direction. The subsequent switching sleeves, described in more detail below, are actuated in an analogous manner.

[0083] Fig. Figure 8 shows a perspective view of part of the sleeve 3 and several actuating elements. As can be seen from Fig. As can be seen in Figure 8, the individual actuating elements are arranged axially spaced apart from one another. Furthermore, it can be seen that each actuating element has several radial sections that are spaced apart from one another in the circumferential direction of the sleeve 3. Each actuating element is designed to convert a rotary movement of the sleeve into a linear movement of the respective associated switching sleeves.

[0084] Fig. Figure 9 shows a sectional view of the gearbox 1 during actuation of the second shift sleeve S2. The second shift sleeve S2 is in Fig. 9 is arranged in the first switching position Bz and can be moved from the first switching position Bz into a Fig. The second switching position Bs, shown in dashed lines, can be moved linearly. The second switching sleeve S2 is directly connected to a second actuating element 13. The second actuating element 13 is connected at its end furthest from the second switching sleeve S2 to a second pin 14. Analogous to the first actuating element 8, the second actuating element 13 has a receiving section, a radial section, and a sliding section. The receiving of the second pin 14 in a receptacle of the receiving section is analogous to the receiving of the first pin 9 in the receptacle of the receiving section of the first actuating element 8.

[0085] The second pin 14 is arranged in a second recess 15 in the sleeve 3. The second shift sleeve S2 is non-rotatably connected to the ring gear 41 of the second planetary gear set PS2. When the sleeve 3 rotates, the second pin 14 can move axially due to the shape of the second recess 15. In this case, the second actuating element 13 moves axially, causing the second shift sleeve S2 to move into the second switching position Bs, shown with dashed lines. As a result, the second actuating element 13 converts a rotary movement of the sleeve 3 into a linear movement of the second shift sleeve S2.

[0086] Fig. Figure 10 shows a sectional view of the gearbox 1 during actuation of the third shift sleeve S3. The third shift sleeve S3 is in Fig. 10 is arranged in the first switching position Cz and can be moved to the second switching position Cs, which is in Fig. The third shift sleeve S3, shown with dashed lines, can be moved linearly. The third shift sleeve S3 is rotationally fixed to the third actuating element 16. The third actuating element 16 is rotationally fixed to the transmission input shaft 4 by means of the web of the first and second planetary gear sets PS1 and PS2. Furthermore, the third actuating element 16 is mechanically connected at the end furthest from the third shift sleeve S3 to a third pin 17, which is arranged in a third recess 18 of the sleeve 3. Analogous to the first actuating element 8, the third actuating element 16 has a receiving section, a radial section, and a sliding section. The receiving of the third pin 17 in a receptacle of the receiving section is analogous to the receiving of the first pin 9 in the receptacle of the receiving section of the first actuating element 8.

[0087] Fig. Figure 11 shows a sectional view of the gearbox 1 during actuation of the fourth shift sleeve S4. The fourth shift sleeve S4 is in Fig. 11 is arranged in the first switching position Mz and can be moved to the second switching position Ms, which is in Fig. The fourth shift sleeve S4, shown with a dashed line, can be moved linearly. Furthermore, the fourth shift sleeve S4 is rotationally fixed to the fourth actuating element 19. The fourth actuating element 19 is rotationally fixed to a ring gear of the first planetary gear set PS1. Additionally, the fourth actuating element 19 is drive-wise connected to a fourth pin 20, which is arranged in a fourth recess 21 of the sleeve 3. The fourth actuating element 19 is rotationally fixed to the fourth shift sleeve S4 by means of a dowel pin 46. The fourth actuating element 19 has a receptacle for receiving the fourth pin 20. The fourth pin 20 is received analogously to the first pin 9 in the receptacle of the receiving section of the first actuating element 8.

[0088] The fifth switching sleeve S5 is in a neutral position, in which no torque is transmitted to the third shaft W3. The fifth switching sleeve S5 has a receptacle for receiving a fifth pin 23, which is located in a fifth recess of the sleeve 3. Furthermore, the fifth switching sleeve S5 is rotationally fixed to the fourth switching sleeve S4. When the sleeve 3 is rotated, the fifth switching sleeve S5 is moved axially from the neutral position to the switching position A shown with dashed lines.

[0089] Fig. Figure 12 shows a section along line BB. Fig. 11. As from Fig. As can be seen in Figure 12, the fourth pawls 11 are rigidly connected to the second shaft W2. The fourth pawls 11 are in a locking position and each engages in a recess 42 of the fourth shift sleeve S4. As a result, the second shaft W2 is rotationally fixed to the fourth shift sleeve S4 by means of the fourth pawls 11. The fourth pawls 11 form the seventh freewheel F7.

[0090] Fig. 13 shows a section along line CC from Fig. 11. From Fig. Figure 13 shows that the second shaft W2 also has other fourth pawls 12. The other fourth pawls 12 are not engaged with the fourth switching sleeve S4, as the latter is in the first switching position Cz. Only when the fourth switching sleeve S4 is moved into the second switching position Cs by means of the fourth actuating device 19 do the other fourth pawls 12 engage with the fourth switching sleeve S4.

[0091] Fig. Figure 14 shows a section along the line MM from Fig. 11. A snap ring 43 is to be removed from this, which is connected to the fourth pawls 11 and the other fourth pawls 12. The snap ring 43 serves to exert a preload on the fourth pawls 11 and the other fourth pawls 12.

[0092] Fig. Figure 15 shows a side view of sleeve 3. From Fig. Figure 15 shows that the sleeve 3 is mechanically connected to a Bowden cable 44. Furthermore, a spring, preferably a tension spring 45, is connected to the sleeve 3, which returns the sleeve 3 to its initial position after actuation. The sleeve 3 has several cutouts 47 by means of which the tension spring 45 is guided on the sleeve 3. The tension spring 45 is connected at one end 48 to the housing G and at the other end 51 to the sleeve 3. Alternatively, the spring could also be designed as a coil spring. Reference sign 1 gearbox 3 Sleeve 4 Gearbox input shaft 5 first door handle 6 other first door handles 7 Survey 8 first actuating device 9 first pen 10 first exception 11 fourth handle 12 other fourth handle 13 second means of operation 14 second pen 15 second exception 16 third means of operation 17 third pen 18 third exception 19 fourth means of operation 20 fourth pen 21 fourth exclusion 23 fifth pen 24 fifth exception 25 Bottom bracket crankshaft 26 heads 27 first ring 28 first thrust washer 29 first snap ring 30 Recording section 31 Radial section 32 Shift section 33 second snap ring 34 Mounting ring 35 Thrust washer 37 Recess in the gearbox input shaft 38 Toothing of the first shift sleeve 39 Grid element 40 Exclusion 41 Ring gear of the second planetary gear set 42 Recess in the fourth shift sleeve 43 Snap ring 44 Bowden cable 45 Tension spring 46 Dowel pin 47 Outbreak 48 End of the torsion spring 49 Longitudinal groove in the housing 50 ice skates 51 other end of the tension spring A Switching position of the fifth switching sleeve The first switching position of the first switching sleeve The second switching position of the first switching sleeve G Housing M Central axis of the gearbox Bz first switching position of the second switching sleeve B's second switching position of the second switching sleeve Cz first switching position of the third switching sleeve C's second switching position of the third switching sleeve HR main wheelset Mz first switching position of the fourth switching sleeve M's second switching position of the fourth switching sleeve F1 first freewheel F2 second freewheel F3 third freewheel F4 fourth freewheel F5 fifth freewheel F6 sixth freewheel F7 seventh freewheel F8 eighth freewheel F9 ninth freewheel F10 tenth freewheel S1 first shift sleeve S2 second shift sleeve S3 third shift sleeve S4 fourth shift sleeve S5 fifth shift sleeve W1 first wave W2 second wave W3 third wave W4 fourth wave PS1 first planetary gear set PS2 second planetary gear set PS3 third planetary gear set PS4 fourth planetary gear set

Claims

[1] Bottom bracket with a gearbox (1) for a bicycle and a bottom bracket crankshaft (25), wherein a gearbox input shaft (4) is non-rotatably connected to the bottom bracket crankshaft (25), comprising at least one switching element and a sleeve (3) which encloses the at least one switching element and is mechanically connected to the switching element in such a way that a rotational movement of the sleeve (3) results in a linear movement of the at least one switching element, characterized by , that the at least one switching element is arranged within the cavity enclosed by the sleeve (3), wherein the at least one switching element allows a relative movement between two components in a first actuation state and establishes a connection for the transmission of a torque between the two components in a further actuation state. [2] Bottom bracket with a gearbox (1) for a bicycle and a bottom bracket crankshaft (25), wherein a gearbox input shaft (4) is non-rotatably connected to the bottom bracket crankshaft (25), wherein at least one switching element and a sleeve (3) which encloses the at least one switching element and is mechanically connected to the switching element in such a way that a rotational movement of the sleeve (3) results in a linear movement of the at least one switching element, characterized by , that several switching elements are arranged inside the sleeve (3). [3] Bottom bracket according to claim 1 or 2, characterized by , that the at least one switching element comprises a first switching sleeve (S1) which can be selectively moved into a first switching position (D) or a second switching position (E) or a third switching position by means of a first actuating means (8). [4] Bottom bracket according to claim 1 or 2, characterized by, that the transmission (1) comprises a first planetary gear set (PS1), a second planetary gear set (PS2), a third planetary gear set (PS3) and a fourth planetary gear set (PS4), wherein the transmission input shaft (4) is non-rotatably connected to a gear set element of the first planetary gear set (PS1) and a gear set element of the second planetary gear set (PS2), and a first shaft (W1) is non-rotatably connected to a gear set element of the fourth planetary gear set (PS4), and a second shaft (W2) is non-rotatably connected to a further gear set element of the third planetary gear set (PS3) and a further gear set element of the fourth planetary gear set (PS4), and a third shaft (W3) is non-rotatably connected to another gear set element of the third planetary gear set (PS3), and a fourth shaft (W4) is non-rotatably connected to a gear set element of the third planetary gear set (PS3) and another gear set element of the fourth planetary gear set (PS4). [5] Bottom bracket according to claim 4, characterized by , that the at least one switching element comprises a first switching sleeve (S1) which can be selectively moved into a first switching position (D) or a second switching position (E) or a third switching position by means of a first actuating means (8). [6] Bottom bracket according to claim 5, characterized by , that a. in the first shift position (D) the transmission input shaft (4) can be connected to the first shaft (W1) in a rotationally fixed manner by means of the first shift sleeve (S1) and / or that b. in the second switching position (E) another gear set element of the second planetary gear set (PS2) can be connected to the first shaft (W1) in a rotationally fixed manner by means of the first switching sleeve (S1) and / or that c. in the third switching position the first shift sleeve (S1) cannot be connected in a rotationally fixed manner to either the transmission input shaft (4) or the other gear set element of the second planetary gear set (PS2). [7] Bottom bracket according to claim 5 or 6, characterized by a. a first freewheel (F1) by means of which, in the first shift position (D) of the first shift sleeve (S1) and in one direction of rotation of the transmission input shaft (4), the transmission input shaft (4) is connected to the first shaft (1) in a rotationally fixed manner and / or by b. a second freewheel (F2), by means of which, in the second switching position (E) of the first shift sleeve (S1) and in a direction of rotation of the other gear set element of the second planetary gear set (PS2), the other gear set element is connected to the first shaft (W1) in a rotationally fixed manner. [8] Bottom bracket according to claim 7, characterized by , that a. the first freewheel (F1) has at least one first pawl (5) which is firmly connected to the first shift sleeve (S1) and / or that b. the second freewheel (F2) has at least one other first pawl (6), which is arranged in the axial direction at a distance from the first pawl (5) and is firmly connected to the first shift sleeve (S1). [9] Bottom bracket according to claim 8, characterized by , that the other gear set element of the second planetary gear set (PS2) has a projection (7), wherein the projection (7) is designed and arranged such that a. in the first switching position (D) of the first switching sleeve (S1) the other first latch (6) is pressed into a release position by means of the protrusion (7) and / or that b. in the second switching position (E) of the first switching sleeve (S1) the first latch (5) is pressed into the release position by means of the protrusion (7) and / or that c. in the third switching position of the first switching sleeve (S1) the first latch (5) and the other first latch (6) are each pressed into a release position by means of the protrusion (7). [10] Bottom bracket according to any one of claims 5 to 9, characterized by , that the first actuating means (8) is connected to the first switching sleeve (S1) in a drive-related manner, wherein the first switching sleeve (S1) is rotatably arranged relative to the first actuating means (8). [11] Bottom bracket according to any one of claims 5 to 10, characterized by , that the first actuating means (8) extends at least partially through the wheelset element of the first planetary gear set (PS1) and / or the wheelset element of the second planetary gear set (PS2). [12] Bottom bracket according to any one of claims 5 to 11, characterized by , that the first actuating means (8) is connected to a first pin (9) which is arranged in a first recess (10) of the sleeve (3). [13] Bottom bracket according to claim 12, characterized by , that a. during a rotational movement of the sleeve (3) a linear movement of the first pin (9) occurs, in particular exclusively in the axial direction, and / or that b. the first actuating means (8) is arranged to rotate relative to the first pin (9). [14] Bottom bracket according to one of claims 1 or 2 or 4 to 13, characterized by , that the at least one switching element comprises a second switching sleeve (S2) which can be selectively moved into a first switching position (Bz) or a second switching position (Bs) by means of a second actuating means (13). [15] Bottom bracket according to claim 14, characterized by , that in the first switching position (Bz) and / or in the second switching position (Bs) the other gear set element of the second planetary gear set (PS2) can be connected to the second shaft (W2) in a rotationally fixed manner by means of the second switching sleeve (S2). [16] Bottom bracket according to claim 14 or 15, characterized by a. a third freewheel (F3) by means of which, in the first switching position (Bz) of the second shift sleeve (S2) and in one direction of rotation of the other gear set element of the second planetary gear set (PS2), the other gear set element is non-rotatably connected to the second shaft (W2) and / or by b. a fourth freewheel (F4), by means of which, in the second switching position (Bs) of the second switching sleeve (S2) and in a different direction of rotation of the second shaft (W2), the other gear set element of the second planetary gear set (PS2) is connected to the second shaft (W2) in a rotationally fixed manner. [17] Bottom bracket according to claim 16, characterized by , that a. the third freewheel (F3) has at least one second pawl which is firmly connected to the second shaft (W2). b. the fourth freewheel (F4) has at least one other second pawl which is firmly connected to the second shaft (W2). [18] Bottom bracket according to any one of claims 14 to 17, characterized by, that the second actuating means (13) is mechanically connected to the second switching sleeve (S2) and a. the second shift sleeve (S2) is non-rotatably connected to the other gear set element of the second planetary gear set (PS2) and / or b. the second actuating means (13) is connected to a second pin (14) which is arranged in a second recess (15) of the sleeve (3). [19] Bottom bracket according to one of claims 1 or 2 or 4 to 18, characterized by , that the at least one switching element comprises a third switching sleeve (S3) which can be selectively moved into a first switching position (Cz) or a second switching position (Cs) by means of a third actuating means (16). [20] Bottom bracket according to claim 19, insofar as it refers back to claim 3, characterized by, that in the first switching position (Cz) and / or in the second switching position (Cs) the transmission input shaft (4) can be connected to the second shaft (W2) in a rotationally fixed manner by means of the third shift sleeve (S3). [21] Bottom bracket according to claim 19 or 20, characterized by a. a fifth freewheel (F5) by means of which, in the first switching position (Cz) of the third shift sleeve (S3) and in one direction of rotation of the wheelset element of the second planetary gear set (PS2), the wheelset element is non-rotatably connected to the second shaft (W2) and / or b. a sixth freewheel (F6), by means of which, in the second switching position (Cs) of the third switching sleeve (S3) and in a different direction of rotation of the second shaft (W2), the gear set element of the second planetary gear set (PS2) is connected to the second shaft (W2) in a rotationally fixed manner. [22] Bottom bracket according to claim 21, characterized by , that a. the fifth freewheel (F5) has at least a third pawl which is firmly connected to the second shaft (W2). b. the sixth freewheel (F6) has at least one other third pawl which is firmly connected to the second shaft (W2). [23] Bottom bracket according to one of claims 19 to 22, characterized by , that the third actuating means (16) is mechanically connected to the third switching sleeve (S3) and a. is non-rotatably connected to the gear set element of the second planetary gear set (PS2) and / or b. is connected to a third pin (17) via a drive mechanism, which is arranged in a third recess (18) of the sleeve (3). [24] Bottom bracket according to one of claims 1 or 2 or 4 to 23, characterized by, that the at least one switching element comprises a fourth switching sleeve (S4) which can be selectively moved into a first switching position (Mz) or a second switching position (Ms) by means of a fourth actuating means (19). [25] Bottom bracket according to claim 24, characterized by , that in the first switching position (Mz) and / or in the second switching position (Ms) the other gear set element of the first planetary gear set (PS1) can be connected to the second shaft (W2) in a rotationally fixed manner by means of the fourth switching sleeve (S4). [26] Bottom bracket according to claim 24 or 25, characterized by a. a seventh freewheel (F7) by means of which, in the first switching position (Mz) of the fourth shift sleeve (S4) and in one direction of rotation of the other gear set element of the first planetary gear set (PS1), the other gear set element is non-rotatably connected to the second shaft (W2) and / or b. an eighth freewheel (F8), by means of which, in the second switching position (Ms) of the fourth switching sleeve (S4) and in a different direction of rotation of the second shaft (W2), the other gear set element of the first planetary gear set (PS1) is connected to the second shaft (W2) in a rotationally fixed manner. [27] Bottom bracket according to claim 26, characterized by , that a. the seventh freewheel (F7) has at least a fourth pawl (11) which is firmly connected to the second shaft (W2). b. the eighth freewheel (F8) has at least one other fourth pawl (12) which is firmly connected to the second shaft (W2). [28] Bottom bracket according to one of claims 24 to 27, characterized by , that the fourth actuating means (19) is mechanically connected to the fourth shift sleeve (S4) and a. is non-rotatably connected to the other gear set element of the first planetary gear set (PS1) and / or b. is connected to a fourth pin (20) via a drive mechanism, which is arranged in a fourth recess (21) of the sleeve (3). [29] Bottom bracket according to one of claims 1 or 2 or 4 to 28, characterized by , that at least one switching element comprises a fifth switching sleeve (S5) which can be selectively moved into a neutral position or a switching position (A) in which the other gear set element of the first planetary gear set (PS1) can be connected to the third shaft (W3) in a rotationally fixed manner by means of the fifth sliding sleeve (S5). [30] Bottom bracket according to claim 29, characterized by a ninth freewheel (F7) by means of which, in the switching position (A) of the fifth shift sleeve (S5) and in a direction of rotation of the other gear set element of the first planetary gear set (PS1), the other gear set element is connected to the third shaft (W3) in a rotationally fixed manner. [31] Bottom bracket according to claim 30, characterized bythat the ninth freewheel (F9) has at least a fifth pawl which is firmly connected to the third shaft (W3). [32] Bottom bracket according to one of claims 29 to 31, characterized by , that the fifth switching sleeve (S5) a. is non-rotatably connected to the other gear set element of the first planetary gear set (PS1) and / or b. is connected to a fifth pin (23) via a drive mechanism, which is arranged in a fifth recess (24) of the sleeve (3). [33] Bottom bracket according to any one of claims 4 to 32, characterized by a tenth freewheel (F10) by means of which the third shaft (W3) can be connected to a housing (G) in a rotationally fixed manner. [34] Bicycle with a bottom bracket according to any one of claims 1 to 33.

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