Zf Friedrichshafen Ag

Zf Friedrichshafen

Christoph Margraf

Peter Ziemer

Stefan Brom

Martin Brehmer

Kai Bornträger

Andreas Beisswenger

Stefan Beck

Christian Sibla

Ulrich Doerr

Josef Haupt

Thilo Schmidt

Thomas Riedisser

Hagen Doepfert

Gabor Diosi

Johannes Glückler

Angelika Ebert

Jorg Arnold

Thomas Bauer

Valentine Herbeth

Michael Trübenbach

Tamas Gyarmati

Monika Rößner

Carl Schilling

Wolfgang Großpietsch

Robert Reiser

Oliver Angele

Stefan Benz-Breitweg

Christian Staiger

Manuel Steinmann

Sebastian Freis

Uwe Schraff

Markus Strobel

Felix Fink

Klaus Steinhauser

Uwe Griesmeier

Christian Popp

Peter Tiesler

Markus Herrmann

Georg Mihatsch

Kim Führer

Matthias List

Andreas Schmidt

Jörg Arnold

Leschek Debernitz

Reinhard Deppert

Rainer Grundler

Ingo Lippenberger

Maik Wiesner

Sebastian Grimm

Benjamin Schneider

Michel Wiemer

Harald Tiesler

An arrangement for actuating a shift element for a bottom bracket gearbox () includes a shift ring () rotatably mounted in a housing () and assigned to a gearbox component. A shift pawl () for locking or releasing the shift ring () is assigned to the shift ring () for shifting a gear stage. A support region mechanically reinforces the housing () and is provided at least along a contact region () between an inner wall () of the housing () and an outer circumference of the shift ring (). The contact region () is defined by reaction forces () acting when the shift ring () is locked.

Bottom-bracket gear

A gear set arrangement () for a bicycle gearbox () includes a planetary assembly, a stationary component (), a first and a second brake (B, B), and a first and a second freewheel clutch (F, F). One planetary gear set () of the planetary assembly includes a first rotary element, a second rotary element, and a third rotary element. The first rotary element is rotationally fixable on the stationary component () by the first brake (B). The first rotary element is connectable to the output () by the first freewheel clutch (F). The second rotary element is rotationally fixable on the stationary component () by the second brake (B). The second rotary element is connectable to the output () by the second freewheel clutch (F). The third rotary element is connected to the input () for conjoint rotation. The gear set arrangement () is configured to provide three ratios.

Gear set assembly and bicycle gearing system

A rotor carrier for a rotor of an electric machine and to a hybrid module with such a rotor carrier. The rotor carrier includes a tubular base body having elements on an outer circumferential surface facing the rotor for connection between base body and rotor, the base body is connected to a hub by a connection element. The connection element has an axial portion which extends along a part of the axial length of the base body and runs coaxial to the latter, in that receptacles for parts of a clutch are provided on an inner circumferential surface of the axial portion remote of the base body, and in that the connection element has a flange area adjoining the axial portion.

Rotor support for an electrical machine

A rotor carrier for a rotor of an electric machine and to a hybrid module with such a rotor carrier. The rotor carrier includes a pot-shaped base body. The base body overlaps only a portion of the axial extension of the rotor, in that the rotor carrier comprises a second supporting body that has elements on an outer circumferential surface for a positive engagement connection and/or frictional engagement connection between supporting body and rotor, in that the supporting body has a radially extending flange, and in that the bottom of the base body and the flange of the supporting body are connected to one another.

A shaft (W) for a motor vehicle transmission (G) includes four axial bore holes (B, B, B, B) for conducting fluid within the shaft (W). A central axis of each of the four bore holes (B, B, B, B) is spaced apart from an axis of rotation (WA) of the shaft (W). A radial distance (r) between the central axis of at least two of the four bore holes (B, B, B, B) and the axis of rotation (WA) differs from a radial distance (r) between the central axis of one of the remaining bore holes and the axis of rotation (WA). A transmission (G) for a motor vehicle with a shaft (W) is also provided.

Shaft for a motor vehicle transmission

A shaft (W) for a motor vehicle transmission (G) may have axial bore holes positioned within the shaft and configured to guide fluid within the shaft. The shaft may have first, second, and third axial sections (W, W, W), the second axial section being axially between the first and third axial sections. Fluid enters the axial bore holes in the second axial section and exits the axial bore holes in the first and third axial sections. One of the axial bore holes (B; B, B) is arranged, at least partially, in the first axial section and is radially spaced from an axis of rotation (WA) of the shaft. Another of the axial bore holes (BRS; B_SE, B) is arranged, at least partially, in the third axial section. The one of the axial bore holes (B; B, B) is coaxial with the other of the axial bore holes (BRS; B_SE, B).

Transmission shaft, transmission, and motor vehicle drivetrain

A multi-stage planetary transmission for a bicycle or a pedelec includes a transmission input shaft (), a transmission output shaft (), and at least three planetary gear sets (VRS, VR, VR, RS, RS, NRS, NR, NR). A first planetary gear set (RS) and a second planetary gear set (RS) are configured as a main gear set and at least one further planetary gear set (VRS, VR, VR, NRS, NR, NR) is configured as a front-mounted gear set and/or as a rear-mounted gear set. At least three free-wheel clutches (F, F, F, F) and at least three brakes (B, B, B, B) are provided for implementing at least eight gears (G, G, G, G, G, G, G, G, G, G, G, G, G, G, G, G). Moreover, the multi-stage transmission may be a bottom bracket transmission. In addition, a bicycle or pedelec with the multi-stage transmission is proposed.

Planet-type multi-stage transmission for a bicycle or pedelec

A transmission having planetary gearsets (RSRSRSRSRS). Elements (STST) of gearsets (RSRS) form input and output shafts, respectively. Element (SO) of gearset (RS) couples element (HO) of gearset (RS) and can be immobilized by shift element (A). Element (ST) of gearset (RS) couples element (HO) of gearset (RS). Element (HO) of gearset (RS) can be immobilized by shift element (B). Elements (SOST) of gearsets (RSRS) can connect by shift element (C). Elements (HOSOSO) of gearsets (RSRSRS) couple and can couple element (SO) of gearset (RS) by shift element (E). An element of gearset (RS) is connected to an element of gearset (RS), while another element of gearset (RS) can be connected by shift element (D) to another element of gearset (RS). Elements (SOST) of gearsets (RSRS) are connected and can be immobilized by shift element (F).

Automatic transmission

A multi-speed transmission has drive and output shafts, three front-mounted and two rear-mounted planetary gear sets, and shift elements which can be engaged to selectively implement at least eleven forward gears and one reverse gear. The front gear sets are connected to one element of the rear gear sets. Five shift elements are assigned to the front gear sets and two are assigned to the rear gear sets, such that the front gear sets transmit seven output speeds to the rear gear sets. If normalized to the input speed of the drive shaft, at least one output speed of the front gear sets is less than 0, one output speed is greater than 1, one output speed is equal to 0, one output speed is equal to 1 and two output speeds are between 0 and 1.

Multispeed transmission

A multi-speed transmission having drive and output shafts, front-mounted planetary gearsets, rear-mounted planetary gearsets and six shift elements. Selective engagement of shift elements selectively renders a drive shaft speed and speeds generated in the front gearsets for achieving a reverse gear and twelve forward gears via the rear gearsets transmissible as an output speed to the output shaft. Four shift elements are assigned to the front gearsets and two are assigned to the rear gearsets. At least one front gearset is rigidly connected to an element of the rear gearsets, resulting in six different output speeds of the front gearsets being transmissible to the rear gearsets. If normalized to the drive shaft input speed, one output speed is smaller than 0, three output speeds are between 0 and 1, one output speed is equal to 1 and one output speed is greater than 1.

A multi-speed transmission having drive and output shafts, three front-mounted and two rear-mounted planetary gearsets, six shift elements which are selectively engaged to render a speed of the drive shaft and speeds generated in the front gearsets to achieve at least one reverse and twelve forward gears via at least one of the rear gearsets transmissible as the output shaft speed. Four shift elements are assigned to the front gearsets and two shift elements are assigned to the rear gearsets. At least one of the front gearsets is fixed to an element of the rear gearsets, resulting in six different output speeds of the front gearsets being transmissible to at least one of the rear gearsets. If normalized to the input speed of the drive shaft, one of the six output speeds is less than 0, four are between 0 and 1, and one is equal to 1.

A transmission having five planetary gearsets and seven shift elements for achieving various ratios between drive and output shafts. A forward gearset has three shafts. Two intermediate gearsets have four shafts. Two main gearsets have at least four shafts. Depending on the shift states of the second and third shift elements, the forward gearset can generate two rotational speeds at the output side, which transfer from a forward gearset shaft to an intermediate gearset shaft. Depending on the shift states of the first to fifth shift elements, the intermediate gearset can generate eight rotational speeds at the output side, which pass from another intermediate gearset shaft to a main gearset shaft. Depending on the shift states of the seven shift elements, the main gearset can generate up to fourteen forward and two reverse gears at the output side, which are transferred by another main gearset shaft to the output shaft.

Planetary automatic transmission

A rotating shifting element arrangement for an automatic transmission of a vehicle, having a cylinder element (), is proposed, in which an actuating piston () for actuating a shifting element () is arranged in an axially movable way, a compensating cavity () of the shifting element () being provided by way of the actuating piston () and an oil dam (), and wherein the oil dam () is fixed radially outside the piston face () of the actuating piston ().

Clutch assembly

A system for locking and releasing a shifting position of a shifting element that is hydraulically actuatable by an actuating pressure is provided. The shifting element is arranged coaxially with a transmission shaft. The system includes a stop valve. The stop valve is subjectable to a control pressure that is separate from the actuating pressure of the shifting element. The stop valve is arranged radially inside the shifting element in the transmission housing.

Assembly for blocking and enabling a shifting position of a shifting element

An automatic transmission has a first clutch shaft that constantly connects first and fourth planetary gear sets, a second clutch shaft that constantly connects second and third planetary gear sets, and a third clutch shaft that constantly connects the third and first planetary gear sets. A drive shaft is constantly connected to the fourth planetary gear set; an output shaft is constantly connected to the third planetary gear set. The first planetary gear set is directly connected to two shift elements, the second planetary gear set is directly connected to four shift elements, the third planetary gear set is directly connected to two shift elements, the fourth planetary gear set is directly connected to four shift elements. The drive shaft is directly connected to only one shift element. The output shaft is directly connected to only one shift element. A seventh shift element is directly connected to the drive shaft and the second and fourth planetary gear sets.

Multi-speed automatic transmission

Growing community of inventors

Markdorf, Germany

Christoph Margraf