CN114270079A - Gear selection drum device and transmission device with same - Google Patents

Gear selection drum device and transmission device with same Download PDF

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Publication number
CN114270079A
CN114270079A CN202080061041.5A CN202080061041A CN114270079A CN 114270079 A CN114270079 A CN 114270079A CN 202080061041 A CN202080061041 A CN 202080061041A CN 114270079 A CN114270079 A CN 114270079A
Authority
CN
China
Prior art keywords
gear
drum
gear selection
selection drum
arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202080061041.5A
Other languages
Chinese (zh)
Inventor
J·豪普特
T·加斯曼
D·格特
M·韦克豪森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GKN Driveline International GmbH
Original Assignee
GKN Driveline International GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to DE102019213179.4 priority Critical
Priority to DE102019213179.4A priority patent/DE102019213179A1/en
Application filed by GKN Driveline International GmbH filed Critical GKN Driveline International GmbH
Priority to PCT/EP2020/072912 priority patent/WO2021037592A1/en
Publication of CN114270079A publication Critical patent/CN114270079A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00Arrangement or mounting of transmissions in vehicles
    • B60K17/04Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00Arrangement or mounting of transmissions in vehicles
    • B60K17/02Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K17/00Arrangement or mounting of transmissions in vehicles
    • B60K17/04Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H63/00Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/08Multiple final output mechanisms being moved by a single common final actuating mechanism
    • F16H63/16Multiple final output mechanisms being moved by a single common final actuating mechanism the final output mechanisms being successively actuated by progressive movement of the final actuating mechanism
    • F16H63/18Multiple final output mechanisms being moved by a single common final actuating mechanism the final output mechanisms being successively actuated by progressive movement of the final actuating mechanism the final actuating mechanism comprising cams
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00Arrangement or mounting of electrical propulsion units
    • B60K2001/001Arrangement or mounting of electrical propulsion units one motor mounted on a propulsion axle for rotating right and left wheels of this axle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2200/00Transmissions for multiple ratios
    • F16H2200/0021Transmissions for multiple ratios specially adapted for electric vehicles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H2200/00Transmissions for multiple ratios
    • F16H2200/003Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0034Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H3/00Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/02Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
    • F16H3/08Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
    • F16H3/087Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
    • F16H3/089Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H48/00Differential gearings
    • F16H48/20Arrangements for suppressing or influencing the differential action, e.g. locking devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H63/00Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30Constructional features of the final output mechanisms
    • F16H63/34Locking or disabling mechanisms
    • F16H63/3416Parking lock mechanisms or brakes in the transmission
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H63/00Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30Constructional features of the final output mechanisms
    • F16H63/38Detents

Abstract

The invention relates to a gear selection drum arrangement for a gear shift unit in a drive train of a motor vehicle, comprising: a rotary drive device (3) having a motor shaft (4), the motor shaft (4) being rotatably drivable in two rotational directions (R1, R2); and two gear selector drums (5, 6) which are in drive connection with the motor shaft (4) in such a way that one of the gear selector drums (5, 6) is driven in rotation, while the other gear selector drum (6, 5) is not rotated, depending on the direction of rotation of the motor shaft (4). The invention further relates to a transmission device (35) having such a gear selector drum device (2).

Description

Gear selection drum device and transmission device with same
Technical Field
The invention relates to a gear selector drum device for shifting a plurality of shift elements, in particular for a drive train of a motor vehicle, and to a transmission device having such a gear selector drum device.
Background
DE 10203633 a1 discloses a shifting device for a transmission having a cam gear with a shifting element, which is rotatably guided on a shaft and is provided with at least one groove track. At least one shifting means engages in the groove track, which shifting means can be moved axially in each case by the shape of the groove track when the shifting element is rotated. The groove rail has an upshift stroke formed as an upshift groove and a downshift stroke provided for downshifting. The downshift travel is designed as a downshift groove which guides the shifting means during a downshift into an axial shift position corresponding to the neutral position.
A motor vehicle transmission having a rotatable gear selector drum with two groove tracks is known from WO 2019/063227 a 1. The first groove track has a front track section, a rear track section and a side section which is designed as a dead-lane structure. The track-following element engages in the groove track, said track-following element being coupled to the parking lock in such a way that the arrangement of the track-following element in the side section brings about a locked state of the parking lock. A second path following element is provided, which engages in the second groove track and is coupled to a shift fork for shifting a forward gear of the motor vehicle.
A gear selector drum arrangement for a dual clutch transmission drive train is known from WO 2018/141551 a 1. The apparatus includes a first gear selection drum coupled to a first motor through a first planetary gear set arrangement and a second gear selection drum coupled to a second motor through a second planetary gear set arrangement.
A transmission control device with a gear selector drum is known from WO 2015/058753 a 2.
A stepped transmission with a shifting and selection device with a cam element is known from DE 10011271 a 1.
Devices with a gear selection drum and a shift fork are used, for example, in multi-gear transmissions, in which the actuation can be carried out manually or electromechanically. The gear selection drum usually has a circumferential groove on the outer surface, into which one or more shift forks can be fitted. By rotating the gear selection drum, the shift forks are moved in accordance with the groove profile in order to shift gears in a predefined sequence, which sequence is defined by the groove profile. If several shifting elements are to be shifted independently of one another, a gear selector drum with an adjusting mechanism is required for each shifting element.
Disclosure of Invention
The object of the present invention is to provide a gear selector drum arrangement which allows shifting of a plurality of shift elements and which has a simple structural design. The object is also to provide a transmission device with such a gear selector drum arrangement, which is easy to construct.
In order to solve the object, a gear selector drum device for a gear shift unit of a motor vehicle drive train is proposed, comprising: a rotary drive having a motor shaft which is rotatably driven in two rotational directions; and two gear selector drums, the said gear selector drum is connected with motor shaft so as to drive one of the said gear selector drums rotationally according to the direction of rotation of the said motor shaft, and another gear selector drum is non-driven.
The arrangement allows switching of the two gear shift systems by means of independent switching actions with only one rotary drive. The shifting system can be a component of a torque-transmitting shifting unit, such as a transmission, a clutch, in particular an off-clutch and/or a parking lock for a selectively drivable drive train. In this case, it is possible for the two gear selector drums to be used for actuating the same or different shifting units.
Within the scope of the present disclosure, the term "drive connection" is intended to include in particular all forms of torque transmission between the motor shaft and the respective gear selector drum shaft. In particular, a gear stage, for example a gear pair, can be provided between the motor shaft and the respective drum shaft.
The rotary drive is designed to rotationally drive the motor shaft in both rotational directions. The rotary drive is preferably designed in the form of an electromechanical servomotor or electric motor, wherein other rotary drives, such as hydraulic or pneumatic drives, are also possible.
These two gear selector drums, which can also be referred to as shift drums, are formed separately and can be driven in rotation independently of one another depending on the direction of rotation of the rotary drive. The two gear selector drums are in particular in driving connection with the rotary drive such that, when the motor shaft is driven in a first direction of rotation, the first gear selector drum is driven in rotation, while the second gear selector drum is undriven, and vice versa, such that, when the motor shaft is driven in a second, opposite direction of rotation, the second gear selector drum is driven in rotation, while the first gear selector drum is undriven. Included conceptually together within the scope of the present disclosure with "driverless" are: the associated drive shaft is twisted relative to the gear selector drum, i.e. the gear selector drum is decoupled from the drive shaft in the direction of rotation and can in particular be stationary.
Each gear selector drum can be connected to the motor shaft via an associated one-way clutch. Such a one-way clutch is designed such that the input part establishes a torque-transmitting connection with the output part in a first rotational direction and is freely rotatable relative to the output part in the opposite rotational direction. In this regard, the one-way clutch can also be referred to as a freewheeling clutch, a one-way clutch or an overrunning clutch. The first and second one-way clutches can in principle be arranged at any position in the drive train between the motor shaft and the associated gear selection drum. In this case, the first and second one-way clutches are designed or arranged relative to one another such that in each direction of rotation of the motor shaft one-way clutch is closed and the other one-way clutch is open, and vice versa. Thus, the two shifting systems can be selectively actuated by a corresponding selection of the direction of rotation. The servomotor can thus operate both shifting mechanisms independently of one another.
In particular, the first gear selection drum can be connected to the drive shaft via a first one-way clutch, which is locked when the motor shaft is driven in the first direction of rotation and is released when the motor shaft is driven in the second direction of rotation, and the second gear selection drum can be connected to the drive shaft via a second one-way clutch, which is locked when the motor shaft is driven in the second direction of rotation and is released when the motor shaft is driven in the first direction of rotation.
According to a first embodiment, the two gear selector drums are arranged on a common drive shaft, which is in driving connection with the motor shaft. According to a second embodiment, the two gear selector drums can be arranged on two separate drive shafts, which are both in driving connection with the motor shaft. The two gear selector drum shafts can be arranged parallel to one another or at an angle to one another. When two shafts are used, the one-way clutch can be arranged in the drive train between the servomotor and the gear selection drum shaft instead of between the gear selection drum and the gear selection drum shaft.
Each gear selector drum has at least one circumferential adjustment contour, which can be formed in particular in the form of a guide groove. The adjusting contour is designed in the peripheral region in such a way that it has at least a first contour section and a second contour section, which are spaced apart from one another in the axial direction and are connected to one another by a gradient section. At least one shifting element, for example a shift fork, can be provided for each gear selector drum, which cooperates with the circumferential adjustment contour. By means of the at least two profile sections, at least two shift positions of the shift member can be achieved accordingly.
In the detailed description, the first gear selection drum can have a first adjustment contour on a first outer circumferential surface for shifting the first shifting member, and the second gear selection drum can have a second adjustment contour on a second outer circumferential surface for shifting the second shifting member.
It goes without saying that any application for the gear selection drum and a corresponding design of the adjustment contour can be envisaged. For example, the one or more adjustment contours can be designed, for example, for shifting at least two gears of the transmission, for actuating a parking brake, for actuating a shifting clutch and/or for locking a differential.
A latching mechanism for at least one of the two gear selector drums can be provided in order to hold the respective gear selector drum in a defined rotational position. The latching mechanism can, for example, comprise a latching element which can engage resiliently into a latching recess. For example, the gear selector drum can have one or more detent recesses distributed over the circumference, into which detent elements connected to the stationary component can engage in a detent manner.
According to one specific embodiment, a sensor is provided for at least one of the first and second gear selector drums, which sensor is designed to detect the rotational position of the associated gear selector drum. For this purpose, the gear selector drum can have one or more transmitter elements distributed over the circumference, the position of which transmitter elements can be detected by the sensor.
Drawings
Preferred embodiments are explained below with the aid of the figures. Wherein:
fig. 1 shows, partially in longitudinal section, a gear selector drum arrangement according to the invention for actuating a shift unit of a drive train for a motor vehicle in a first embodiment;
FIG. 2 illustrates a gear selector drum of the device of FIG. 1 in an axial view;
fig. 3 shows a circumferential development of a second gear selection drum of the device of fig. 1 with a schematically depicted adjustment profile;
fig. 4 shows a circumferential development of a first gear selector drum of the device of fig. 1 with a schematically depicted adjustment profile;
fig. 5 shows a circumferential development of a gear selector drum with a schematically depicted adjustment contour for the device of fig. 1 in a modified embodiment;
fig. 6 shows, partially in longitudinal section, a gear selector drum arrangement according to the invention for actuating a shift unit of a drive train for a motor vehicle in a second embodiment; and is
Fig. 7 shows a schematic representation of a drive device with a gear selector drum arrangement according to the invention in a sectional view.
Detailed Description
Fig. 1 to 4, which are described jointly below, show a gear selector drum arrangement 2 for actuating one or more shift units of a drive train (not shown) for a motor vehicle. The gear selector drum arrangement 2 has a rotary drive 3 and two gear selector drums 5, 6 which can be driven in rotation by a drive shaft 4 of the rotary drive 3. The rotary drive 3 is configured for rotationally driving the drive shaft 4 in a first rotational direction R1 and in an opposite second rotational direction R2. The gear selector drums 5, 6 are in driving connection with the drive shaft 4 in such a way that they are driven in rotation or are undriven or stationary depending on the direction of rotation R1, R2 of the drive shaft 4.
The gear selector drum device 2 can be used for shifting various gear shift units, for example for shifting at least two gears of a transmission, for actuating a parking brake, for actuating a shifting clutch and/or for locking a differential. The gear selector drum arrangement 2 can also be referred to as an actuator arrangement. The rotation driving device 3 may be configured as a motor, for example, but is not limited thereto. The drive shaft 4 of the rotary drive 3 can also be referred to as a motor shaft.
According to the present embodiment, the two gear selector drums 5, 6 are arranged on a common drive shaft 7, which is in driving connection with the motor shaft 4 and can also be referred to as gear selector drum shaft. The drive train 8 between the motor shaft 4 and the gear selection drum shaft 7 contains an optional gear stage 9 which is designed to convert the rotational movement of the rotary drive 3 from a fast speed to a slow speed. It goes without saying that the transmission ratio of the rotary movement from the rotary drive 3 to the gear selector drums 5, 6 can be selected or designed according to technical requirements. The gear stage 9 comprises a pinion (Ritzel) 10 connected to the motor shaft 4 in a rotationally fixed manner and a gear 11 connected to the gear selection drum shaft 7 in a rotationally fixed manner, which mesh with one another.
The two gear selector drums 5, 6 are formed separately and can be driven in rotation independently of one another as a function of the direction of rotation R1, R2 of the rotary drive 3. When the motor shaft 4 is driven in a first direction of rotation R1, the first gear selection drum 5 is driven in rotation, while the second gear selection drum 6 is non-driven or non-rotating. When the motor shaft 4 is driven in the second, opposite direction of rotation R2, the second gear selection drum 6 is driven in rotation, whereas the first gear selection drum 5 is non-driven or non-rotating. Here, "non-driven" means in particular that the gear selector drum shaft 7 can be rotated relative to the respective gear selector drum, wherein the gear selector drum can be stationary.
In the present exemplary embodiment, the two gear selector drums 5, 6 are connected to the gear selector drum shaft 7 via associated one-way clutches (Freilauf) 15, 16. In the present exemplary embodiment, the one-way clutches 15, 16 are each formed to act in opposite rotational directions between the gear selector drum shaft 7 and the respective gear selector drum 5, 6. When the gear selection drum shaft 7 rotates in the first direction of rotation, torque is transmitted to the first gear selection drum 5 via the first one-way clutch 15, while the second one-way clutch 16 is torque-free, so that the second gear selection drum 6 is stationary. When the gear selection drum shaft 7 rotates in the opposite rotational direction, the first one-way clutch 15 interrupts the transmission of torque, so that the first gear selection drum 5 is stationary and torque is transmitted to the second gear selection drum 6 via the second one-way clutch 16 to rotate it.
The one-way clutches 15, 16 can be designed as desired in order to achieve the technical functionality of coupling in one rotational direction and decoupling in the opposite rotational direction. For example, the one-way clutches 15, 16 can each comprise a one-way clutch input, a one-way clutch output and one or more clamping bodies 14 arranged circumferentially between the input and the output. The clamping body 14 can be formed, for example, in the form of a roller, a non-circular body or a pawl. The first one-way clutch output is formed by the section 13 of the first gear selector drum 5 and the first one-way clutch input is formed by the section 12 of the gear selector drum shaft 7. Radially between the shaft and the drum, a plurality of clamping bodies 14 are arranged distributed over the circumference. The second one-way clutch 16 is constructed or arranged such that the clamping body 19 is arranged between a second one-way clutch input formed by the second section 17 of the gear selector drum shaft and a section 18 of the second gear selector drum 6 as output, between which the clamping body is arranged.
The gear selector drum shaft 7 can be mounted in a stationary component (not shown) by means of the bearing means 21, 22 in a manner that it can be rotated about the axis of rotation a 7. An axial bearing 23 for rotational decoupling is provided between the two gear selector drums 5, 6, so that they can rotate relative to one another without friction.
As can be seen in particular in fig. 1, each gear selector drum 5, 6 has a circumferential adjustment contour 25, 26, which is formed in the form of a groove track without being limited thereto. Depending on the number of adjustment contours 25, 26, at least one adjustment element, for example in the form of a shift fork, can be provided for each gear selection drum 5, 6, which adjustment element interacts with the circumferential adjustment contour. For example, the adjusting element can be axially actuated in each case by a path-following element which interacts with the adjusting contour. For this purpose, the path-following elements engage in the adjusting contours 25, 26 of the associated gear selector drum 5, 6 and are correspondingly moved axially by the rotation of the gear selector drum, so that the associated shift fork connected to the path-following elements is also moved axially in accordance with the adjusting contours 25, 26. It goes without saying that the adjustment contour can be formed according to the technical requirements for the structural unit to be switched.
The exemplary adjustment contour 25 of the first gear selection drum 15 shown in fig. 4 is designed to realize three shift positions Pa, Pb, Pc. For this purpose, the adjusting contour 25 has a first section 25a without a gradient, an adjoining transition section 25t with an axial gradient, an intermediate section 25b without a gradient, a second transition section 25s with an axial gradient and a second section 25c without a gradient over a range of half a revolution of the gear selector drum 5, that is to say over a range of rotation angles of 180 °. The second half extending in the circumferential direction, i.e. the half extending from 180 ° to 360 °, is formed symmetrically to this, wherein the individual segments 25s ', 25b ', 25t ' are provided with a marked line. When the path-following element engages in the first section 25a, a first shift position Pa of the shift fork or of the transmission, which can form a first gear of the transmission, for example, is engaged. When the gear selector drum is rotated by 90 ° relative to the shift position Pa, the path-following element is moved into an intermediate shift position Pb, which can form, for example, a neutral position of the transmission. When the gear selection drum 5 rotates half a turn (180 °), the track following element is in a second shift position Pc, which can form, for example, a second gear of the transmission. Upon further rotation of the gear selector drum 5, the transmission can, starting from the second position Pc, again be first shifted into an intermediate or neutral shift position Pb (at 270 °), and from there into an initial position (at 360 °) or into the first shift position Pa corresponding to the first gear of the transmission.
In order to reliably engage or hold the shift positions Pa, Pb, Pc, a latching mechanism 27, 28 for at least one of the two gear selector drums 5, 6 can optionally be provided. The latching means 27, 28 comprise a latching element 29, which latching element 29 can be latched into a recess 30 of the gear selector drum 5, 6. The number of the detent recesses 30 preferably corresponds to the shift positions to be occupied in a defined manner. In the present case, four detent recesses 30a, 30b, 30c, 30b 'are provided for the first gear selector drum 5, which detent recesses are arranged in the peripheral region in accordance with the contour sections 25a, 25b, 25c, 25 b' or the shift positions Pa, Pb, Pc. The detent elements 29 are in the present case embodied in the form of balls which are acted upon radially inwardly by the spring 32 in the direction of the axis of rotation a7 of the gear selector drum 5. The spring 32 can be received or supported in a stationary housing 33.
The exemplary adjustment contour 26 of the second gear selection drum 6 shown in fig. 3 is designed to realize two shift positions Pa, Pb. For this purpose, the adjusting contour 26 has, over a single revolution of the gear selector drum 6, i.e. over 360 ° around the axis of rotation, a first section 26a without a gradient and a second section 26b without a gradient, which is axially spaced apart from the first section, which are connected by transition sections 26t, 26 t' with an axial gradient. When the path following elements of the second gear selection drum 6 engage in the first portion 26a, the first shift position Pa of the shift fork or of the shift unit connected thereto comes to rest. When the gear selector drum is rotated by 180 ° relative to the first shift position Pa, the path following element is moved into the second shift position Pb, so that the shift fork is moved into the second shift position Pb. When the gear selection drum 6 continues to be rotated, the first shift position Pa is reached again, and so on.
In order to reliably engage or hold the two shift positions Pa, Pb, an optional latching mechanism 28 is also provided in the second gear selector drum 6. In the present case, only two detent recesses 31a, 31b are provided for the second gear selection drum 6, which are arranged in the peripheral region in accordance with the contour sections 26a, 26b or the shift positions Pa, Pb. The latching mechanism 28 for the second gear selection drum 6 is designed in accordance with the latching mechanism 27 of the first gear selection drum 5, so that reference is briefly made to the above description.
At least one of the two gear selector drums 5, 6 can be provided with a sensor in order to detect the rotational position Pa, Pb, Pc of the associated gear selector drum. For this purpose, the gear selector drums 5, 6 can have one or more transmitter elements distributed over the circumference, the position of which can be detected by the sensor. The transmission element can be arranged in particular in a rotational position representing a shift position, so that the engagement of the shift position can be reliably detected.
Fig. 5 shows a further gear selector drum 5 in a developed view for a gear selector drum arrangement according to the invention with a modified embodiment of the adjustment contour. The gear selector drum 5 corresponds in large part in terms of construction and mode of operation to the embodiment of fig. 1 and 4, so that reference is made to the above description for common points. The same or modified details are provided with the same reference numerals as in the figures described above. The features of this embodiment are discussed below.
The gear selector drum 5 according to fig. 5 has two adjusting contours 24, 25, which are designed to realize four shift positions Pa, Pb, Pc, Pd. For this purpose, one of the adjusting contours 24 has, in the range of one half of a revolution (180 ° angle of rotation) of the gear selection drum 5, a first section 24a without a gradient (for the first shift position Pa or first gear), a transition section 24t adjacent to the first section with an axial gradient, a second section 24b without a gradient (for the second shift position Pb or second gear), a second transition section 24s with an axial gradient, and an intermediate section 24c without a gradient (neutral position). The second half of the circumferential extension, i.e. the half extending from 180 ° to 360 °, is formed symmetrically to this.
The further adjusting contour 25 has, within a range of one half of a revolution of the gear selection drum 5 (that is to say a rotation angle of 180 °), an axially intermediate section 25a without gradient (neutral position), a first transition section 25t adjoining this section with axial gradient, a first section 25b without gradient (for the third shift position Pc or the third gear), a second transition section 25s with axial gradient and a second section 25c without gradient (for the fourth shift position Pc or the fourth gear shift). The second half of the circumferential extension of the adjustment contour 25, i.e. the half from 180 ° to 360 °, is formed symmetrically to this.
The associated path-following element engages in each of the two adjustment contours 24, 25. In this case, the actuating contours 24, 25 are coordinated with one another in such a way that, when the path following elements of the actuating contour 24 pass through or are arranged in the shift sections 24a and 24b, the path following elements of the actuating contour 25 are located in the section 25a, i.e. in the neutral position, over this range of rotational angles. Conversely, it is accordingly provided that the path following elements of the adjusting contour 24 are in the range 24c, i.e. in the neutral position, in this range of rotational angles when the path following elements of the adjusting contour 25 pass through or are arranged in the shift ranges 25b and 25 c.
In order to reliably engage or hold the four shift positions Pa, Pb, Pc, Pd, an optional detent mechanism 28 can also be provided in the gear selector drum 5 according to fig. 5. In this case, six detent recesses 30a, 30b, 30c, 30d, 30c ', 30 b' are provided for the gear selector drum 5, which detent recesses are arranged in the circumferential region in accordance with the contour sections 24a, 24b, 25c or the shift positions Pa, Pb, Pc, Pd.
Fig. 6 shows a second embodiment of the gear selector drum arrangement 2 according to the invention, which largely corresponds to the embodiment according to fig. 1 to 4, so that reference is made to the above description for the common points. The same or corresponding details are provided with the same reference signs.
The difference in the present embodiment according to fig. 6 is that the two gear selector drums 5, 6 are arranged on two separate drive shafts 7, 7'. The two drive shafts 7, 7' are each in driving connection with the motor shaft 4. The respective drive trains 8, 8 'between the motor shaft 4 and the gear selector drum shafts 7, 7' each contain a gear stage 9 in order to convert the rotary motion of the rotary drive 3 from a fast speed to a slow speed. The first gear stage 9 for the first gear selection drum 5 comprises a pinion 10 connected to the motor shaft 4 and a gear wheel 11 connected to the gear selection drum shaft 7, which pinion and gear wheel mesh with each other. The second speed change stage 9 ' for the second gear selection drum 6 comprises a pinion 10 and a second gear 11 ' connected to the second gear selection drum shaft 7 ', which pinion and gear mesh with each other. In this case, the two gear selector drum shafts 7, 7' are now arranged parallel, other arrangements being possible.
It can also be seen that the first gear wheel 11 and the second gear wheel 11' currently have different diameters, so that different gear ratios for the two gear selector drums 5, 6 result. It goes without saying, however, that the transmission ratios can also be identical.
In the present embodiment, the one-way clutches 15, 16 are each arranged between the respective gear selector drum 5, 6 and the associated gear selector drum shaft 7, 7'. However, according to a modified embodiment, it is also possible for one or two one-way clutches 15, 16 to be arranged in the respective drive train 8, 8 'between the rotary drive 3 and the gear selection drum shaft 7, 7'.
Fig. 7 shows a transmission device 35 according to the invention with a gear selector drum arrangement 2 according to fig. 1 according to the invention. The transmission device 35, which comprises the gear box 36 and the differential 37, can be driven by an electric motor 38. The electric motor 38 and the transmission device 35 together form an electric drive for driving a drive shaft of the motor vehicle. The electric drive can be used as the sole drive source or together with an additional drive source.
The motor shaft of the electric motor 38 is connected to a drive shaft 39. The manual transmission 36 comprises two shift steps, so that the introduced torque can be transmitted from the drive shaft 39 to the countershaft 40 in two different gear ratios i1, i 2. The intermediate shaft 40 is in driving connection with a differential base 41 of the differential 37. By means of the differential 37, the introduced torque is distributed to the two half shafts for driving the wheels. A coupling unit (Kupplungseinheit) 42 is provided, which can be actuated by the gear selector drum device 2 in order to selectively shift the manual transmission 36 into the neutral position, into the first gear or into the second gear. The gear selector drum arrangement 2, which is only schematically illustrated here, can be configured, for example, according to fig. 1 with the gear selector drums 5, 6 according to fig. 3 and 4.
The gear change transmission 36 is configured as a reduction transmission, so that the rotational movement introduced by the electric motor 38 is converted from a fast speed to a slow speed. The first gear ratio step comprises a first drive pulley 44, which is mounted rotatably on the drive shaft 39, and a first intermediate gear 45, which is connected in a rotationally fixed manner to the intermediate shaft 40 and meshes with one another. The first drive pulley 44 and the first intermediate gear 45 form a first gear set having a first gear ratio i 1. The second gear ratio stage comprises a second drive pulley 46, which is mounted rotatably on the drive shaft 39, and a second intermediate gear 47, which is connected in a rotationally fixed manner to the intermediate shaft 40 and meshes with one another. The second drive wheel 46 and the second intermediate gear 47 form a second gear set having a second gear ratio i 2. The third gear stage comprises a driven gear 47 connected to the intermediate shaft 40 and a ring gear 48 meshing therewith and fixedly connected to the differential carrier 41.
The differential base 41 is supported in the housing 43 so as to be rotatable about a rotation axis a 41. The differential 37 further includes a plurality of differential gears 49 and two side gears 50, 51, wherein the differential gears 49 are rotatably supported on shafts perpendicular to the rotation axis a41 in the differential base 41, and the two side gears 50, 51 are respectively arranged so as to be rotatable coaxially with the rotation axis a41 and are meshed with the differential gears 49. The torque introduced from the ring gear 48 into the differential base 41 is transmitted to the two side gears 50, 51 through the differential gear 49, with a balancing effect between the two side gears. The side gears 50, 51 are connected for torque transmission in angular motion by means of synchronous universal joints 52, 53 to associated axle shafts (not shown) which transmit the torque to the wheels.
The coupling unit 42 is arranged axially between a first drive wheel 44 and a second drive wheel 46. The coupling unit is designed for selectively transmitting torque from the drive shaft to the first drive wheel 44 or the second drive wheel 46. For this purpose, a coupling element 54 is provided, which can connect the coupling input, which is connected in a rotationally fixed manner to the drive shaft 39, optionally to the first drive wheel 44 or the second drive wheel 46. The coupling element 54 is designed in the form of a sliding sleeve which is held in a rotationally fixed and axially displaceable manner on the coupling input.
The sliding sleeve 54 is actuated by the first gear selector drum 5 of the gear selector drum arrangement 2 according to the invention. The first gear selection drum 5 is twisted by operating the rotary drive 3 in a first direction of rotation R1, while the second gear selection drum 6 is stationary. In this case, the path-following element 55 interacting with the adjusting contour 25 follows and moves the shift element 54 connected thereto, in particular in the form of a shift fork, in the axial direction. The shift fork 56 engages in an annular groove of the sliding sleeve 54. The gear selector drum device 2 can be actuated by an electronic control unit and, as required, depending on the current or desired driving state of the motor vehicle.
The transmission device 35 comprises a two-speed circuit (zweiggangsschaltung) formed by a first power path and a second power path functionally connected in parallel. By means of a corresponding actuation of the gear selector drum arrangement 2 into the first or second shift position Pb, Pc, the coupling unit 42 can selectively transmit torque from the electric motor 38 to the differential 37 via the first power path (gears 44, 45, 47, 48) or alternatively via the second power path (gears 46, 47, 48).
When the path following element 55 engages in the middle section of the adjusting contour 25, the shift fork 56 is correspondingly in an axially central shift position (N) which corresponds to the neutral position of the shift transmission 36. In this position, the electric motor 38 and the differential 37 are decoupled from one another so that no torque is transmitted between the axle shafts and the electric motor 38. When the gear selection drum 5 is rotated relative to the shift position Pa, the path following element 55 is displaced in the first axial direction (currently to the right) so that, starting from the neutral position, the shift fork 56 assumes a first shift position (G1) which corresponds to a first gear of the manual transmission 36. As the gear selection drum 5 continues to rotate, the path following element 55 or the shift fork 56 first passes through an axially intermediate shift position (N) and from there in the second direction (currently to the left) into a shift position (G2) corresponding to the second gear of the manual transmission 36. As the gear selection drum 5 continues to rotate, the path-following element 55 or the shift fork 56 again enters the axially central shift position (N) or neutral position.
The second gear selection drum 6, which is only schematically illustrated here, is rotated by actuating the rotary drive 3 in the opposite rotational direction. The second gear selection drum 6 is used to shift another gear shift unit, for example a parking lock (not shown).
The described embodiment allows switching two shifting systems with only one rotary drive 3 by means of independent switching actions.
List of reference numerals:
2-gear selection drum device
3 Rotary drive device
4 drive shaft/motor shaft
5 first gear selection drum
6 second gear selecting drum
7. 7' drive shaft/gear selection drum shaft
8. 8' power train
9. 9' speed change stage
10 pinion
11 Gear
Section 12 (15)
13 section (15)
14 clamp body (15)
15 first one-way clutch (5)
16 second one-way clutch (6)
Section 17 (16)
18 section (16)
19 clamp body (16)
21. 21' support device
22. 22' support device
23 axial bearing
24 regulating outline (5)
25 regulating outline (5)
26 regulating outline (6)
27 locking mechanism
28 locking mechanism
29 latching element
30 latch recess
32 spring
33 casing
35 Transmission device
36-shift transmission
37 differential mechanism
38 electric motor
39 drive/transmission shaft
40 intermediate shaft
41 differential base
42 coupler unit
43 casing
44 primary drive wheel
45 first intermediate gear
46 second driving wheel
47 second intermediate gear
48 ring wheel
49 differential gear
50 side gear
51 side gear
52 synchronous universal joint
53 synchronous universal joint
54 coupling element
55 track following element
56 Shift Member
57 shift member
Axis A
P shift position
R direction

Claims (15)

1. A gear selector drum arrangement for a gear shift unit in a powertrain of a motor vehicle, said drum arrangement comprising:
a rotary drive (3) having a motor shaft (4), the motor shaft (4) being rotatably drivable in two directions of rotation (R1, R2),
it is characterized in that
Two gear selector drums (5, 6) which are in drive connection with the motor shaft (4) in such a way that, depending on the direction of rotation of the motor shaft (4), one of the gear selector drums (5, 6) is driven in rotation, while the other gear selector drum (6, 5) is undriven.
2. The gear selector drum arrangement of claim 1,
it is characterized in that the preparation method is characterized in that,
upon driving the motor shaft (4) in a first rotational direction (R1), the first gear selection drum (5) is rotationally driven, while the second gear selection drum (6) is stationary, and
upon driving the motor shaft (4) in a second direction of rotation (R2), the second gear selection drum (6) is rotationally driven, while the first gear selection drum (5) is stationary.
3. Gear selection drum arrangement according to claim 1 or 2,
the first gear selection drum (5) and the second gear selection drum (6) are arranged on a common drive shaft (7) which is in driving connection with the motor shaft (4).
4. Gear selection drum arrangement according to claim 1 or 2,
the first gear selection drum (5) being arranged on a first drive shaft (7) and the second gear selection drum (6) being arranged on a second drive shaft (7'),
wherein the first and second drive shafts (7, 7') are in driving connection with the motor shaft (4).
5. The gear selection drum arrangement according to any one of claims 1 to 4,
it is characterized in that the preparation method is characterized in that,
the first gear selection drum (5) is connected with the drive shaft (7) by a first one-way clutch (15), the first one-way clutch (15) being locked when driving the motor shaft (4) in the first rotational direction (R1) and being open when driving the motor shaft (4) in the second rotational direction (R2), and
the second gear selection drum (6) is connected with the drive shaft (7, 7') through a second one-way clutch (16), the second one-way clutch (16) being locked when the motor shaft (4) is driven in the second rotational direction (R2) and being opened when the motor shaft (4) is driven in the first rotational direction (R1).
6. The gear selection drum arrangement according to any one of claims 1 to 5,
it is characterized in that the preparation method is characterized in that,
at least one of the first gear selection drum (5) and the second gear selection drum (6) has a detent element (29) with which the respective gear selection drum (5, 6) can be held in a rotational position (Pa, Pb, Pc, Pd, Pe).
7. The gear selection drum arrangement according to any one of claims 1 to 6,
it is characterized in that the preparation method is characterized in that,
a sensor is provided for at least one of the first gear selector drum (5) and the second gear selector drum (6), said sensor being designed to detect the rotational position of the associated gear selector drum (5, 6).
8. The gear selection drum arrangement according to any one of claims 1 to 7,
it is characterized in that the preparation method is characterized in that,
the first gear selection drum (5) has a first adjustment contour (25) on a first outer circumferential surface for switching a first shifting member (56), and the second gear selection drum (6) has a second adjustment contour (26) on a second outer circumferential surface for switching a second shifting member (57).
9. The gear selector drum arrangement of claim 8,
it is characterized in that the preparation method is characterized in that,
the first adjustment contour (25) and the second adjustment contour (26) are circumferentially closed.
10. The gear selection drum arrangement according to claim 8 or 9,
it is characterized in that the preparation method is characterized in that,
at least one of the first and second adjustment contours (25, 26) is designed for shifting at least two gears of a manual transmission (36).
11. The gear selection drum arrangement according to any one of claims 8 to 10,
it is characterized in that the preparation method is characterized in that,
at least one of the first adjustment contour (25) and the second adjustment contour (26) is designed for actuating a parking brake.
12. The gear selection drum arrangement according to any one of claims 8 to 11,
it is characterized in that the preparation method is characterized in that,
at least one of the first adjustment contour (25) and the second adjustment contour (26) is designed for a locking differential (37).
13. The gear selection drum arrangement according to any one of claims 8 to 12,
it is characterized in that the preparation method is characterized in that,
at least one of the first and second adjustment contours (25, 26) is designed to actuate the off-clutch.
14. Transmission device, in particular for an electrically drivable drive train of a motor vehicle, having a gear change transmission (36), the gear change transmission (36) having a coupling unit (42) and a gear selector drum arrangement (2),
wherein the gear change transmission (36) can be selectively shifted into a first gear change position in which a torque is transmitted from the input element to the output element with a first transmission ratio and into a second gear change position in which a torque is transmitted from the input element to the output element with a second transmission ratio by means of the gear selector drum arrangement (2) and the coupling unit (42),
it is characterized in that the preparation method is characterized in that,
the gear selection drum arrangement (2) is designed according to any one of claims 1 to 13.
15. A transmission arrangement as recited in claim 14,
it is characterized in that the preparation method is characterized in that,
the transmission (36) can be shifted into a neutral position, in which the input part and the output part can rotate freely relative to each other, by means of the gear selector drum device (2) and the coupling unit (42).
CN202080061041.5A 2019-08-30 2020-08-14 Gear selection drum device and transmission device with same Pending CN114270079A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE102019213179.4 2019-08-30
DE102019213179.4A DE102019213179A1 (en) 2019-08-30 2019-08-30 Shift drum assembly and gear assembly with such a shift drum assembly
PCT/EP2020/072912 WO2021037592A1 (en) 2019-08-30 2020-08-14 Gear selector drum arrangement and transmission arrangement comprising such a gear selector drum arrangement

Publications (1)

Publication Number Publication Date
CN114270079A true CN114270079A (en) 2022-04-01

Family

ID=72145390

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202080061041.5A Pending CN114270079A (en) 2019-08-30 2020-08-14 Gear selection drum device and transmission device with same

Country Status (3)

Country Link
CN (1) CN114270079A (en)
DE (1) DE102019213179A1 (en)
WO (1) WO2021037592A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19530616C2 (en) * 1995-08-21 1998-10-22 Daimler Benz Ag Switching device for gear change transmission
DE10011271B4 (en) * 2000-03-08 2009-04-09 Daimler Ag Multi-step transmission with a selector and selector
DE10128854A1 (en) * 2001-06-15 2002-12-19 Zf Sachs Ag Shift device for gear change box esp. for motor vehicles with sequential shifting up or down without tractive force interruption
DE10203633A1 (en) * 2002-01-30 2003-09-04 Zahnradfabrik Friedrichshafen Gear shift device
WO2015058753A2 (en) * 2013-10-22 2015-04-30 Schaeffler Technologies AG & Co. KG Transmission-and-clutch actuator having a clearance angle and a freewheel
DE102017102212B4 (en) * 2017-02-06 2020-06-18 Magna Pt B.V. & Co. Kg Shift drum assembly and automotive powertrain
DE102017009029B4 (en) * 2017-09-27 2019-11-21 Daimler Ag Motor vehicle transmission, in particular for a motor vehicle

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DE102019213179A1 (en) 2021-03-04

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