WO2021146916A1 - Dispositif de changement de vitesse pour une transmission - Google Patents

Dispositif de changement de vitesse pour une transmission Download PDF

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Publication number
WO2021146916A1
WO2021146916A1 PCT/CN2020/073502 CN2020073502W WO2021146916A1 WO 2021146916 A1 WO2021146916 A1 WO 2021146916A1 CN 2020073502 W CN2020073502 W CN 2020073502W WO 2021146916 A1 WO2021146916 A1 WO 2021146916A1
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WO
WIPO (PCT)
Prior art keywords
shift
adapter
shifting device
driving block
select
Prior art date
Application number
PCT/CN2020/073502
Other languages
English (en)
Inventor
Xiaoming Feng
Xiaoming Li
Ran Zhou
Original Assignee
Knorr-Bremse Braking Systems For Commercial Vehicles (Dalian) Co., Ltd.
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
Application filed by Knorr-Bremse Braking Systems For Commercial Vehicles (Dalian) Co., Ltd. filed Critical Knorr-Bremse Braking Systems For Commercial Vehicles (Dalian) Co., Ltd.
Priority to PCT/CN2020/073502 priority Critical patent/WO2021146916A1/fr
Priority to CN202110072214.XA priority patent/CN113217618B/zh
Publication of WO2021146916A1 publication Critical patent/WO2021146916A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/08—Multiple final output mechanisms being moved by a single common final actuating mechanism
    • F16H63/20—Multiple final output mechanisms being moved by a single common final actuating mechanism with preselection and subsequent movement of each final output mechanism by movement of the final actuating mechanism in two different ways, e.g. guided by a shift gate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/0278—Constructional features of the selector lever, e.g. grip parts, mounting or manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
    • F16H59/02—Selector apparatus
    • F16H59/04—Ratio selector apparatus
    • F16H59/041—Ratio selector apparatus consisting of a final output mechanism, e.g. ratio selector being directly linked to a shiftfork
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/26—Generation or transmission of movements for final actuating mechanisms
    • F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
    • F16H61/32—Electric motors actuators or related electrical control means therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/32—Gear shift yokes, e.g. shift forks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
    • F16H63/30—Constructional features of the final output mechanisms
    • F16H63/32—Gear shift yokes, e.g. shift forks
    • F16H2063/321—Gear shift yokes, e.g. shift forks characterised by the interface between fork body and shift rod, e.g. fixing means, bushes, cams or pins

Definitions

  • the present invention relates to a shifting device for a transmission.
  • it relates to a shifting device of a vehicle transmission with at least two shift-units.
  • sliding sleeves are used in order to form rotationally fixed connections between gears pivoting on a shaft and the shaft itself in order to engage a gear.
  • a sliding sleeve can be put up to three positions on the shaft. In one position, the sliding sleeve forms a rotationally fixed connection with one gear on the shaft, in a second position it forms a rotationally fixed connection with another gear on the shaft and in yet another position it doesn’ t form any connection with a gear at all. This position is called neutral position.
  • the movements of the sliding sleeves are usually transmitted by shift-forks, which are used as shift-units and form a positive connection with the sliding sleeves. One shift-fork is connected to one sliding sleeve.
  • the shifting device according to Fig. 1 comprises three shift-rods (51, 61, 71) that are arranged in parallel, each of which is connected to a related shift-fork (not shown) , respectively.
  • the shift-rods (51, 61, 71) can be moved independently from each other along a y-direction, which is parallel to the longitudinal axes of the shift-rods (51, 61, 71) .
  • the shifting device according to Fig. 1 comprises a shift shaft 34, which is positioned in an x-direction perpendicular to the longitudinal axis of the three shift-rods (51, 61, 71) and thus to the y-direction.
  • the adapter 40 is firmly mounted on the shift shaft 34.
  • the adapter 40 includes a shift finger 41, which can be engaged by a positive connection with recesses that are formed in each shift-rod (51, 61, 71) .
  • the shift finger 41 is mounted within the adapter 40 and rotatable around the shift shaft 34 and protrudes outwards of the adapter 40 in a direction towards the shift-rods (51, 61, 71) so that it can be coupled with one of them at a time.
  • the adapter 40 and the shift finger 41 are also moved into the same direction but if in contrast the shift shaft 34 is rotated, only the shift finger 41 rotates, while the adapter 40 doesn't.
  • the shifting device comprises one select actuator 20 and one shift actuator 30.
  • the shift actuator 30 is situated in a certain distance from the shift actuator 34, in both, a direction perpendicular to the x-direction and the y-direction from the shift shaft 34, and is connected to it by a lever 39 forming a crank mechanism and allowing the shift actuator 30 to rotate the shift shaft 34 about its longitudinal axis.
  • Both actuators 20, 30 are designed as hydraulic linear actuators.
  • the adapter 40 and the shift finger 41 are moved alongside the x-direction, which is parallel to the longitudinal axis of the shift shaft 34 and, thus, perpendicular to the shift-rods 51, 61, 71.
  • the shift finger 41 By moving the shift finger 41 along the shift shaft 34 in x-direction, it can be engaged with the recesses of the shift-rods (51, 61, 71) and thus a selection of one of the shift-rods 51, 61, 71 and its corresponding shift-fork that is to be shifted can be performed.
  • the actual shifting movement of the shift-fork can be executed.
  • the shift actuator 30 is activated.
  • the longitudinal movement induced by the actuator is transformed into a rotational movement of the shift shaft 34 by the lever 39 and the crank mechanism.
  • the shift finger 41 is also rotated with the shift shaft 34.
  • the shift finger 41 which is engaged with one of the shift-rods 51, 61, 71, is moved alongside the y-direction by which also the engaged shift-rod 51, 61, 71 and the corresponding shift-fork are moved along the y-direction.
  • the selected shift-fork is able to move the sliding sleeve into a predetermined position by which a gear is engaged.
  • a disadvantage of the shifting device according to the above described prior art is that a large space is needed for the shifting device. This is mainly because of the requirement of a shift shaft, which is arranged perpendicular to the longitudinal axes of the shift-rods. Thus, the width of the layout of the shifting device is large especially considering that, apart from the shift shaft, the select actuator also is required in extension of the shift shaft.
  • the shifting device for a transmission with at least two shift-units comprises, at least two shift-rods connected to the at least two shift-units of the transmission, respectively, or formed integrally with them as one piece. That means, that each shift-rod is connected to exactly one shift-unit.
  • the shifting device according to the invention further comprises a main shaft on which the at least two shift-forks are supported so as to be still movable along the longitudinal direction of the main shaft, which is also referred to as x-direction.
  • x-direction the shift-units and the shift-rods connected thereto can only be moved along the longitudinal axis of the main shaft.
  • the shifting device further comprises a select driving block configured to be movable in a y-direction, which extends perpendicular to the x-direction, and to transmit a force provided by a select actuator to an adapter in the y-direction. Further, a shift driving block is provided being configured to transmit a force provided by a shift actuator to the adapter in x-direction.
  • the shift driving block and the select driving block are formed as two different parts.
  • the adapter is also formed as an independent part from both, the select driving block and the shift driving block.
  • the adapter is configured to be moved into the same number of predetermined positions in y-direction as there are shift-rods. In said positions the adapter engages with only one of the shift-rods at a time. Once the adapter is in one of the positions the respective selected shift-unit can be moved in x-direction into different predetermined positions to shift a selected gear. Each of these positions either leads to the engagement of the respective sliding sleeve of the shift-unit being moved with a gear or is a neutral position in which no gear is engaged.
  • shifting device With the shifting device according to the invention, a long shift shaft, which is connected to both actuators and which can be moved along its axis can be avoided.
  • the level of integration can be raised and much smaller embodiments of shifting devices with less spatial requirements can be achieved.
  • the possible connections between the adapter and the shifting rods are formed in a positive-locking manner. Additionally or alternatively also the connection between the shift driving block and the adapter are formed in a positive-locking manner.
  • shift finger in this application is to be understood as any projection extending outward of the adapter in a direction perpendicular to both, the x-direction and the y-direction. It may be provided in different shapes such as for example a cube, a cuboid, a spherical shape or others.
  • the recesses in the shift-rods or the shift driving block, respectively, are formed in corresponding shapes.
  • the shift finger is configured to be able to be pushed into the adapter in a manner in which the shift finger does not engage with any recess of any shift-rod.
  • the shift finger is configured to be able to sink into the adapter.
  • the shift finger is advantageously shaped in a manner that allows it to be pushed out of one of the recesses in the shift-rod it is engaged with, when the adapter is moved in the y-direction, while a force in x-direction is still transmitted to the shift-rod.
  • a shape for example, is a shape, having a rectangular cross-sectional view in y-direction and a triangular cross-sectional view in x-direction. Due to the triangular shape the shift finger is pushed towards the inside of the adapter when being moved in y-direction.
  • the rectangular shape provides a positive locking connection in x-direction.
  • This embodiment allows the shifting device to engage a gear at a higher velocity. While in other embodiments the adapter, together with the selected shift-rod, is to be brought into a neutral position first in order to select a new shift-rod, the selection of the shift-rod can also be started out of a position of the shift-rod, which is not the neutral position provided that the shift-rod is brought back into said neutral position by a different mechanism than the shift mechanism.
  • This different mechanism provided to bring the shift-rod into its neutral position, could be e.g. a spring mechanism or a spring, which applies an urging restore force to the shift-rod in the direction towards the neutral position when the shift rod is moved out of the neutral position by the adapter.
  • the select actuator is activated out of a not neutral position, the force applied by the select actuator to the adapter and its shift finger will cause the shift finger to be pushed into the adapter due to its triangular shape in the cross-sectional view in x-direction and thus to disengage with the selected shift-rod.
  • the shift-rod is brought back into its neutral position by, for example, the spring mechanism mentioned above and the gear is disengaged, too.
  • the adapter is moved in the quickest way possible in order for the shift finger to be engaged with the recess of a different shift-rod. Once a different shift-rod is selected, it can be moved in x-direction to engage a new gear.
  • the select driving block comprises at least one projection, which is configured to engage with the recess of at least one shift-rod, which at the time is not engaged with the shift finger of the adapter.
  • the adapter is arranged in a central part of the select driving block in y-direction.
  • the select driving block comprises two projections, with one of them being provided on every side of the adapter and the two projections being configured to be engaged with the recess of the shift-rods in at least one position of the adapter.
  • each of the shift-rods comprises a shift finger, configured to be engaged with a recess formed in the adapter and to be able to be pushed inside the respective shift-rod, especially by movement of the adapter in y-direction, in a manner in which the shift finger does not engage with the recess of the adapter.
  • the select driving block transmits the force provided by the select actuator to the adapter in a positive-locking manner.
  • the shift driving block transmits the force provided by a shift actuator to the adapter also in a positive-locking manner.
  • a positive-locking connection to the adapter is a technical comparatively simple way of transmitting forces. It doesn't require complex parts and is in most cases easy to design with respect to the given spatial requirements of the device. It therefore offers advantages in terms of low-cost production and maintenance of the components involved, especially with regard to other ways of transmitting forces, like magnetic or electromagnetic connections or frictional connections.
  • the shifting device further comprises a select detent, which is configured to lock the select driving block and thus the adapter in each position in which the adapter moved by the select driving block is engaged with only one of the shift-rods at the time. It additionally or alternatively comprises a shift detent configured to lock the shift driving block in each position, in which the respective shift-rod engaged with the adapter is in one of the predetermined positions along the x-direction.
  • This embodiment provides a possibility to assure, that the predetermined positions in either the y-direction or the x-direction are maintained throughout the engaging progress. Furthermore, it has to be made sure that the force by the detent holding the adapter in the x-direction or the y-direction respectively is selected to be smaller than the force that can be applied by the respective actuator.
  • the shifting device further comprises at least one select position sensor configured to detect the position of the select driving block and/or at least one shift position sensor configured to detect the position of the shift diving block.
  • the position of the adapter can be detected and sent to a control unit, which controls the shifting device. Knowing the exact position of the adapter is important to firstly provide a secure and unambiguous connection between the adapter and the shifting rods and to assure the right end positions of the movements of the adapter and secondly to be able to move the adapter into the right directions and thus assuring the correct select or shift movement.
  • the select actuator and/or the shift actuator are either one of a pneumatic actuator, hydraulic actuator or electric actuator. All three different kinds of actuators offer suitable alternatives in terms of low-cost solutions, which provide a sufficient dynamic and precision of the movement.
  • the invention further comprises a method for shifting gears with a shifting device for a transmission according to claim 5.
  • the select actuator and the shift actuator of the shifting device can be activated at least partly at the same time.
  • the shift actuator can only be activated once the select actuator has assured that the right shift-rod has been selected.
  • a method in which both, the shift movement and the select movement can be performed at least partly simultaneously, a reduction of the time for selecting and shifting a gear can be achieved.
  • Fig. 1 a schematic perspective view of a shifting device according to the prior art
  • Fig. 2 a perspective view of a shifting device according to an embodiment of the invention
  • Fig. 3 a cross-sectional view in y-direction of the shifting device of Fig. 2
  • Fig. 4a, 4b, 4c a top view on the main part of the shifting device of Fig. 2 with the adapter being in three different select positions
  • Fig. 5a, 5b, 5c a top view on the main part of the shifting device of Fig. 2 with the adapter being in three different shift positions
  • Fig. 1 shows a perspective view of a shifting device of a transmission according to the prior art. A detailed description of the Figure can be found above, which is why only the basic functional concept is described here.
  • the shifting device has two actuators, one select actuator 20 and one shift actuator 30.
  • the select actuator is provided to move a shift shaft 34 along its longitudinal axis in a y-direction, while the shift actuator 30 is provided to rotate the shift shaft 34 around its longitudinal axis.
  • an adapter 40 is mounted which comprises a first shift finger 41.
  • the adapter 40 is mounted in a manner on the shift shaft 34 that it can be moved with the shift shaft 34 in y-direction when the shift shaft 34 is moved, but cannot be rotated with the shift shaft 34. In other words, it is mounted rotatable on the shaft 34.
  • the first shift finger 41 in contrast is mounted firmly attached to the shift shaft 34 in both the rotatable direction and the y-direction.
  • the shift finger 41 can be engaged with shift-rods 51, 61, 71 which are connected to shift-forks 50, 60, 70 (not shown) of the shifting device, by which in turn the gears of the transmission can be engaged.
  • the shift-forks are used as shift-units in this embodiment.
  • the first shift finger 41 is moved via the shift shaft 34 in y-direction by the select actuator 20 to select the required shift rod 51, 61, 71.
  • the shift actuator 30 rotates the shift shaft 34 by means of which the shift finger also rotates. Due to the rotation and the coupling between the shift finger and the shift-rod, the shift-rod is moved in x-direction and a gear of the transmission is engaged.
  • Fig. 2 shows a perspective view of a shifting device 1 according to an embodiment of the invention. All reference numerals of corresponding parts in Fig. 1 remain the same.
  • the shifting device 1 comprises a main shaft 10 oriented in x-direction of the shifting device 1, which supports three shift-forks 50, 60, 70, the shift-forks 50, 60, 70 being able to be moved alongside the x-direction.
  • the shift-forks 50, 60, 70 are each connected to one sliding sleeve (not shown) , respectively, by which a gear of the transmission can be engaged when it is moved into a predetermined position in x-direction.
  • each shift-fork 50, 60, 70 is moved into predetermined positions the gears of the transmission can be engaged.
  • Each shift-fork 50, 60, 70 also has one position, in which no gear is engaged, which is the neutral position.
  • To each of the shift-forks 50, 60, 70 one of the shift-rods 51, 61, 71 is firmly attached and all of them are aligned in parallel in x-direction.
  • Fig. 3 shows a cross-sectional view in y-direction of the shifting device of Fig. 2.
  • Each of the shift-rods 51, 61, 71 has a recess 52, 62, 72, respectively, having the shape of a rectangular groove.
  • the recesses 52, 62, 72 are aligned on one level in x-direction, so that the grooves are exactly on the same positions in x-direction.
  • An adapter 40 is connected to the shift rod 51 in a positive-locking manner in x-direction. As a result, a force applied on the adapter 40 in x-direction will be transmitted to the shift-rod 51 and cause its movement in x-direction.
  • the select driving block 21 shows two projections 211 on each side of the adapter 40 (Fig. 2) .
  • these projections are engaged with the recess 62 of the shift-rod 61 on the one side of the adapter 40 and the recess 72 (not shown) of the shift-rod 71 on the other side of the adapter 40. This assures that if the shift-rod 51 is moved by the adapter 40, the other two shift rods 61, 71 stay in the neutral position.
  • the projections 211 have to be wider than the width of a shift-rod in y-direction, as one of the projections 211 must be capable of holding two adjacent shift-rods in a case in which one of the outer shift-rods 61, 71 is selected.
  • the adapter 40 is arranged in a central position of a select driving block 21.
  • a select actuator 20 is provided as a hydraulic actuator causing a movement of the select driving block 21 in y-direction through a select shaft 24 once it is activated.
  • the adapter 40 is sandwiched in a central groove of the select driving block 21 in a manner, in which a movement in y-direction of the select driving block 21 induces also a movement of the adapter 40 in the same direction.
  • a select position sensor 23 and a select detent 22 are also arranged on the select driving block 21. The select position sensor 23 detects the exact position of the select driving block 21 and the select detent 22 locks the select driving block 21 in predetermined positions with a predetermined force, which is smaller than the force that can be applied by the select actuator.
  • a second shift finger 42 is provided on the other side of the adapter 40 in x-direction.
  • This second shift finger 42 is connected in a positive-locking manner with a recess 311, which is formed in a shift driving block 31 (also see Fig. 3) . That means that a movement by the shift driving block 31 in x-direction induces a movement of the adapter 40 in x-direction.
  • a shift actuator 30 is provided as an hydraulic actuator, which moves the shift driving block 31 in x-direction via a small shift shaft (not shown) when activated.
  • a shift position sensor 33 and a shift detent 32 are provided. The shift position sensor 33 detects the exact position of the shift driving block 31 and the shift detent 32 locks the shift driving block 31 in predetermined positions with a predetermined force, which is smaller than the force that can be applied by the shift actuator 30.
  • Both, the shift detent 32 as well as the select detent 22 may be realized by a spring pushing a small ball on the surface of the shift driving block 31 or the select driving block 21 respectively.
  • the detents 22, 32 do not move together with the driving blocks 21, 31 but are locked in a fixed position with regard to, for example, a housing of the shifting device.
  • small grooves are formed at predetermined positions, which correspond to the predetermined positions of the adapter 40. If the driving blocks 21, 31 are moved by the respective actuators 20, 30, the balls of the detents 22, 32 are slightly pressed onto the surface by the bias of the springs and moved along the surfaces. Once they reach a groove, they slide into the grooves and thus a locking mechanism is formed, as force is to be applied to move the balls out of the grooves again. Hence, it can be assured that the selected shift-fork is locked in its predetermined position.
  • Figs. 4a to 4c each provide a top view on the main part of the shifting device of Fig. 2 with the adapter being in three different select positions in each Fig. In all three Figs., the shift-rods are in neutral position in x- direction. To visually emphasize the different positions in which the adapter 40 is in each of the Figs., two dotted lines are shown over all 3 Figs. 4a to 4c.
  • the adapter 40 is positioned over the shift-rod 61 on the very right in projection plane and is connected to it through its first shift finger 41 and the recess 62 in the shift-rod 61.
  • the select detent 22 is on the very left of the select driving block 21 in projection plane, and locks the select driving block 21 in this position.
  • the adapter 40 also moves into the same direction as it is pushed by the select driving block 21.
  • the force applied by the actuator is bigger than the locking force of the detent 22.
  • the select position sensor 23 sends a signal to a control means, which then stops the actuator and the detent locks the position of the select driving block 21 and thus, of the adapter 40.
  • Fig. 4b where the adapter is positioned above the shift-rod 51 and connected to it. Comparing Figs. 4a and 4b, it can be seen that the select driving device 21 and the adapter 40 have moved to the left in projection plane.
  • the control means stops the select actuator 20, when the select position sensor 23 indicates that the select driving block 21 is in the position of Fig. 4c.
  • Figs. 5a to 5c show a top view on the main part of the shifting device of Fig. 2 with the adapter being in three different shift positions, but always engaged with the same shift-rod 51, which means that it is always in the same selected position.
  • two dotted lines are shown in the Figs. 5a to 5c to emphasize the different positions of the shift-rod 51 and the shift fork 50.
  • the neutral position of the shift-rod 51 is shown in Fig. 5b. If the shift actuator 30 is activated and moves the driving shift block 31 in x-direction, the adapter 40 and the shift rod 51 also move in the same direction, which can be seen comparing Fig. 5b with Fig. 5c. Hence, the shift-fork 50 also moves in positive x-direction and engages a gear. Once a predetermined position of the shift-fork 50 and thus the adapter 40 and the shift driving block 31 is reached, the shift position sensor 33 sends a signal to the control means, which in turn stops the actuator 30 and the shift detent 32 locks the position of the shift driving block 31 in the above described manner.
  • the other shift-rods (61, 71) can also be shifted in the same manner.
  • the selecting movement to select a new shift-rod is only possible in the neutral position of each shift-rod. That means, that before selecting a new shift-rod is possible, the respective shift-rod, which is engaged with the adapter, is to be moved into its neutral position first.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

L'invention divulgue un dispositif de changement de vitesse pour une transmission, en particulier une transmission de véhicule, comprenant au moins deux unités de changement de vitesse (50, 60, 70). Le dispositif de changement de vitesse comprend : au moins deux tringles de changement de vitesse (51, 61, 71), reliées aux au moins deux unités de changement de vitesse (50, 60, 70) de la transmission respectivement, un arbre principal (10), conçu pour supporter les au moins deux unités de changement de vitesse (50, 60, 70) dans une direction x, qui s'étend parallèlement à une direction longitudinale de l'arbre principal (10), un bloc d'entraînement de sélection (21) conçu pour être mobile dans une direction y, qui est perpendiculaire à la direction x, et pour transmettre une force fournie par un actionneur de sélection (20) à un adaptateur (40) dans la direction y, un bloc d'entraînement de changement de vitesse (31) conçu pour transmettre une force fournie par un actionneur de changement de vitesse (30) à l'adaptateur (40) dans la direction x, l'adaptateur (40) étant conçu pour être déplacé dans au moins deux positions prédéterminées dans la direction y, dans lesquelles l'adaptateur (40) forme une liaison avec une seule des tringles de changement de vitesse (51, 61, 71) à la fois, moyennant quoi l'unité de changement de vitesse respective (50, 60, 70) peut être déplacée dans la direction x pour passer une vitesse.
PCT/CN2020/073502 2020-01-21 2020-01-21 Dispositif de changement de vitesse pour une transmission WO2021146916A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2020/073502 WO2021146916A1 (fr) 2020-01-21 2020-01-21 Dispositif de changement de vitesse pour une transmission
CN202110072214.XA CN113217618B (zh) 2020-01-21 2021-01-20 用于传动机构的换档装置

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