FR3068755A1 - GEARBOX ACTUATOR COMPRISING AN AXIS DIVIDED ACTUATION MECHANISM, A SYSTEM PACK COMPRISING A GEARBOX ACTUATOR, AN ELECTRIC PUMP ACTUATOR AND A VALVE HOLDER PLATE AND SYSTEM COMPRISING THE SYSTEM PACKAGE AND A CLUTCH BOX. - Google Patents

Abstract

The invention relates to a gearbox actuator (1) for engaging and disengaging gears and / or shifting gears of a gearbox, such as, for example, a double-clutch transmission, a motor vehicle, comprising a displacement unit (2) for translational and rotational movement of a control shaft (3) provided with a first actuating mechanism (4) which is attached to the drive shaft control (3) and which is adapted to actuate a first set of wheels, and a second actuating mechanism (5) which is attached to the control shaft (3) and which is adapted to actuate a second train of wheels, wherein the first actuating mechanism (4) is arranged on one side of the moving unit (2) and the second operating mechanism (5) is arranged on the other side of the displacement unit (2). The invention further relates to a system pack consisting of such a transmission actuator (1), at least a first electric pump actuator (18, 19) and a valve plate (17), wherein the transmission actuator (1) is adapted to be mounted within a transmission bell (16), and the pump actuator (18, 19) and the valve plate (17) are each adapted to be mounted inside or outside the transmission bell (16). The invention furthermore relates to a system consisting of such a system pack and a transmission bell (16), in which a gearbox actuator (1) is arranged and fixed inside the bell. of a gearbox (16), and an electric pump actuator (18, 19) and a valve plate (17) are arranged and each fixed inside or outside the box bell speeds (16).

Description

Gearbox actuator comprising an axially divided actuation mechanism, system pack consisting of an electric gearbox actuator, an electric pump actuator and a valve plate and system consisting of the system pack and a gearbox bell

The invention relates to a gearbox actuator, in particular a hydraulic gearbox actuator or driven by an electric motor, for engaging and disengaging gears and / or for shifting or changing or selecting gears. of a gearbox, such as for example a double clutch gearbox, of a motor vehicle, comprising a displacement unit for translational and rotational displacement of a control shaft provided with a first mechanism actuation which is fixed to the control shaft and which is designed to actuate, consequently to engage and disengage and to change the speeds of a first set of wheels, such as for example a first gearbox part, and a second actuation mechanism which is fixed to the control shaft and which is intended to actuate, consequently to engage and disengage the gears and to change the gears of a second set of wheels, such as for example a second gearbox part. The invention further relates to a system pack comprising such a gearbox actuator, consisting of at least one electric pump actuator and a valve plate. The invention further relates to a system comprising said system pack and a gearbox bell.

Already known from the state of the art of gearbox actuators, in particular hydraulic gearbox actuators. For example, document WO2015 / 149795 discloses a hydraulic gearbox actuator (HGA) for example for a double clutch gearbox comprising control rods, intended to actuate control rods for actuating shift positions by means of a speed change source having an integrated speed change lever provided with a control finger and locking and ejecting elements for an active interlocking system, in which respectively only one axial unit is provided for the selection movement and only one pivoting unit is provided for the pivoting movement.

Such an active interlocking system makes it possible to preselect the gears in the two parts of a dual-transmission gearbox by means of a common set of actuators and in any combination. The active interlocking gearbox actuator consists essentially of the module of a gearshift selection shaft and the module of a drive unit. A control finger unit with a control finger as well as locking and ejecting elements forms the interface for the internal control of the gearbox. It interacts with the control rods for actuation of the sliding sleeves. In analogy to the operation of manual gearboxes, gear engagement is effected by means of the control finger. But the peculiarity lies in the fact that, in comparison with the width of the control fingers, clearly larger jaws, consequently gaps are formed on the control rods. It thus becomes possible, even when a gear is engaged, to bring the rotating control shaft back to the central position and to select another channel for another speed by means of the control finger. If a new speed is then preselected in the same part of the gearbox, the locking and ejection elements simultaneously ensure the disengagement of a speed which has already been passed.

The control shaft can be moved both in one direction of rotation and in the other direction of rotation, in order to eject the previously engaged speed. In the drive unit, an electric motor is respectively provided to carry out the gear change and gear selection movement. The gear change motor ensures the engagement and disengagement of the gears as well as the return of the control finger to the central selection position. It also ensures the rotary movement of the control shaft. The speed change motor, on the other hand, is responsible for positioning the control finger in the desired path, consequently for axial displacement of the control shaft and for axial positioning of the control finger.

In the case of a prior art hydraulic gearbox actuator, however, only the gearshift unit comprising the control finger and the locking and ejection elements is mounted inside the gearbox bell. The hydraulic displacement unit for translational and rotational movement of the control shaft is arranged outside the gearbox bell. Consequently, the state of the art always has the disadvantage that a larger mounting space is required outside the gearbox bell. In addition, the path between synchronization and actuation is very large, which leads to other drawbacks.

Consequently, the object of the invention is to reduce or at least reduce the drawbacks of the state of the art. In particular, the invention aims to develop a gearbox actuator which requires a reduced mounting space outside the gearbox bell, which also allows an increase in the rigidity of the actuation of gearbox and which reduces the complexity of the gearbox actuator.

The object of the invention is solved according to the invention with a device of this type, by the fact that the first actuation mechanism is arranged on one of the axial sides of the displacement unit and that the second mechanism actuator is arranged on the other side of the displacement unit opposite the first side.

This has the advantage that a conventional active interlocking system is divided locally into an area for a first set of wheels and an area for the second set of wheels. Therefore, it is possible to combine all of the clutch and gearbox actuators into a system pack, which can be integrated for the most part in the mounting space of the gearbox bell. Furthermore, the fact of arranging the actuation mechanisms on both sides of the displacement unit makes it possible to increase the rigidity of the actuation of the gearbox, since the path going from the control rods to the synchronizations is reduced. The solution according to the invention therefore proposes to arrange the actuation mechanisms at the two ends of the control shaft and for this reason to divide them locally, in order inter alia to reduce the distance between synchronization and actuation.

Advantageous embodiments are claimed in the claims and are explained in more detail below.

It is further expedient that the gearbox actuator is a hydraulic gearbox actuator (HGA). As a result, the axial sliding and the rotary movement of the control shaft can be actuated in a simple manner.

It is also advantageous that the first actuation mechanism is arranged at one of the axial ends of the control shaft and that the second actuation mechanism is arranged at the other axial end of the control shaft, since a path between actuation and synchronization can thus be reduced.

It is also advantageous that the displacement unit intended to slide axially and / or to cause rotation and / or to pivot the control shaft between the first actuation mechanism and the second actuation mechanism is arranged on the control shaft. As a result, the distance between synchronization and actuation can therefore be considerably reduced, which leads to an increase in the rigidity of the actuation of the gearbox.

In addition, it is expedient that the first actuation mechanism comprises a control finger for engaging the gears and / or that the second actuation mechanism comprises a control finger for the engagement of gears which is different from the finger. for controlling the first actuation mechanism. Therefore, unlike the prior art gearbox actuator, two control fingers are required, which actuate the first wheel set or the second wheel set alternately. For the concept, it is not necessary for two parts of the gearbox to be divided by being separated "up" and "down". For actuation, it does not matter which part of the gearbox the upper or lower control rods lead to. The speeds of a first and second set of wheels are of greater importance here.

On this point, it has proved to be advantageous that the first actuation mechanism further comprises at least one ejection element or a disengagement finger for disengaging gears and / or that the second actuation mechanism further comprises at least one ejection element or a disengagement finger for the ejection / disengagement of the gears, in which the ejection element of the second actuation mechanism is different from the ejection element of the first actuation mechanism actuation.

It is also advantageous for the control finger of the first actuation mechanism and the control finger of the second actuation mechanism to be arranged on the control shaft so that one of the two control fingers is always arranged in an actuating position, that is to say in radial alignment with a control rod, and that the other is offset from one or all of the control rods. This therefore means that, when a first set of wheels is actuated, the second set of wheels is not actuated and the second control finger therefore moves in an empty lane. It is therefore guaranteed that each time only one speed can be engaged.

In addition, an advantageous embodiment is characterized in that the gearbox actuator is arranged inside a gearbox bell. This means that both the control shaft, provided with the control fingers and possibly ejection elements, as well as the displacement unit allowing the axial sliding or the rotation of the control shaft, are arranged at the inside the gearbox bell. As a result, the mounting space outside the gearbox bell can be reduced advantageously.

The object of the invention is also solved according to the invention by the fact that a system pack is used which is composed of a gearbox actuator according to the invention, of at least one electric pump actuator (EPA) and a valve block or valve plate, in which the hydraulic gearbox actuator is adapted to be mounted inside a gearbox bell, and the pump actuator and the valve plate are each designed to be mounted inside or outside the gearbox housing. It does not matter whether the valve block or the valve plate is arranged inside or outside the gearbox housing. It is preferable to arrange the electric pump actuator "outside". But it can just as easily be "inside".

Advantageously, the elements of the hydraulic gearbox actuator can be mounted inside the gearbox bell, while the pump actuator and the valve plate comprising the valves intended to supply the hydraulic gearbox actuator and for example a cut-off clutch can be arranged outside the gearbox.

In this context, it is appropriate that the system pack includes two electric pump actuators. This is the only way to guarantee that a clutch actuation can be carried out at any time by means of an electric pump actuator. This means that the second electric pump actuator serves as "backup". This means that the duplicate arrangement of the electric pump actuator is not in place to add the actuation energies. Rather, this leaves (temporarily) at least one electric pump actuator available, while the second electric pump actuator performs clutch actuation.

In addition, the invention also relates to a system composed of a system pack according to the invention provided with a gearbox actuator, at least one electric pump actuator and a valve plate and a gearbox bell, in which the gearbox actuator is fixed inside the gearbox bell, for example to the gearbox bell and the electric pump actuator or the electric actuators of pump and valve plate are each attached to the inside or outside of the gearbox housing.

In other words, the invention relates to a solution for the optimal integration of the hydraulic actuation system of the gearbox, in which a conventional “active interlocking system” is divided locally and the assembly of clutch and gearbox actuators come together in a system pack. It is therefore possible to integrate the system pack partially into the gearbox mounting space. Therefore, the rigidity of the gearbox actuation is increased by the shortening of the path from the control rods to the synchronizations. Unlike an active interlocking system of the prior art, the control and disengagement fingers are not arranged at one end of the shaft, but the control and disengagement fingers are separated to actuate a first train wheels and for actuating a second set of wheels of a gearbox and arranged at both ends of the drive shaft, in order to reduce the distance between synchronizations and actuation.

Therefore, two control fingers are required. Preferably, a first set of wheels is associated with one side (axial) and the other set of wheels is associated with the other side (axial). The control rods are arranged in such a way that when one of the sets of trains (for example the first) is actuated, the other train of wheels (for example the second) is not actuated, but the second finger of control, for the actuation of the second set of wheels, moves in an empty track and is not aligned with a control rod.

Due to a transverse sliding of the control shaft, a control rod can be formed in the first set of wheels or in the second set of wheels. Following a consecutive rotation of the shaft, the torque of the control shaft is then transferred to the control rod via the control finger, so that the control rod is disengaged. In the conversion according to the invention, the transverse and rotary movement is converted by the hydraulic displacement unit in the hydraulic gearbox actuator. The transverse sliding therefore makes it possible to select a speed and the rotary movement makes it possible to engage or change a speed. Preferably, the hydraulic gearbox actuator is fully integrated inside the gearbox bell and mounted directly on a valve plate. The valve plate isolates the gearbox from the outside. This has the advantage that the hydraulic path has satisfactory ventilation and that the total rigidity of the gearbox actuator assembly is increased, since shorter control rods are used for interlocking. active.

The invention is explained in more detail below using the drawings. We can see that:

Fig. 1 illustrates a schematic representation of a gearbox actuator according to the invention comprising a control shaft and locally separate actuation mechanisms for actuating a first set of wheels and a second set of wheels, fig. 2 illustrates a schematic representation of the gearbox actuator comprising a hydraulic piston unit for axial sliding and a piston-rack unit for the rotary movement of the control shaft, fig. 3 illustrates a schematic representation of the gearbox actuator comprising a piston unit for axial sliding and a pivoting unit for the rotary movement of the control shaft, and FIG. 4 illustrates a schematic representation of the gearbox actuator comprising two electric pump actuators, a valve plate and a gearbox bell and the arrangement of the latter relative to each other.

The figures are only of a schematic nature and are used exclusively for the understanding of the invention. The same elements are provided with the same reference numbers.

FIG. 1 illustrates a gearbox actuator 1 for engaging and disengaging gears and / or for shifting a double clutch of a motor vehicle. Usually, a hydraulic gearbox actuator (HGA) is used.

As can be seen in Figure 2, the gearbox actuator 1 comprises a displacement unit 2, which is designed to move a control shaft 3 in translation and in rotation. A first actuation mechanism 4 is attached to the control shaft 3, which is designed to actuate a first set of wheels. A second actuation mechanism 5 is also attached to the control shaft 3, which is designed to actuate a second set of wheels.

The first actuation mechanism 4 is arranged on one side, the first, of the displacement unit 2 and the second actuation mechanism 5 is arranged on the other side of the displacement unit 2. By Consequently, the first actuation mechanism 4 is arranged at a first axial end of the control shaft 3, while the second actuation mechanism 5 is arranged at the other axial end, therefore opposite to the first end of the control shaft 3.

The displacement unit 2 comprises a control module 6 and a selection module 7. The control module 6 is designed to move the control shaft 3 in rotation, so that the actuation mechanism cooperates with a rod. control 8, so that the control rod 8 is engaged. The selection module 7 is designed to axially slide the control shaft 3 and thus to bring the control rods 8 into alignment with an actuation mechanism 4, 5. The first actuation mechanism 4 and the second mechanism d actuation 5 each have a control finger 9 and at least one ejection element 10 / a disengagement finger 10.

The selection unit 7 is therefore designed to bring either the control finger 9 of the first actuation mechanism 4 or the control finger 9 of the second actuation mechanism 5 into alignment with the control rod 8. The fingers control 9 are arranged on the control shaft 3 so that, when the control finger 9 of the first actuating mechanism 4 is in alignment with a control rod 8, the other control finger 9, namely of the second actuation mechanism 5, moves in an empty lane.

The control module 6 can, as illustrated in FIG. 2, be made in the form of a unit comprising a piston 11 and a rack 12, which cooperate with each other so as to be able to bring them into rotation the control shaft 3 when the piston 11 is stressed under pressure. The control module 6 can, as illustrated in FIG. 3, also be produced in the form of a unit comprising a pivoting wing 13, the control shaft 3 being moved in rotation following a stress in pressure of one of the oil chambers separated from each other by the pivoting wing 13.

The selection module 7 is produced in the form of a unit comprising a piston 14, which, when an oil chamber is stressed under pressure, can be made to slide against a prestressing of a spring 15 , so that the control shaft 3 is made to slide axially.

FIG. 4 illustrates the arrangement of the gearbox actuator 1. The gearbox actuator 1 is arranged jointly with the control shaft, the control fingers 9, the disengagement fingers 10 / the elements d ejection 10 and the displacement unit 2 inside a gearbox bell 16 and fixed to the gearbox bell 16. The gearbox bell is closed by a valve plate 17, which is arranged outside the gearbox bell 16. On the valve plate 17 are arranged several valves, which are connected to a first electric pump actuator (EPA) 18 and to a second electric pump actuator (EPA) 19. The electric pump actuators 18, 19 are therefore also arranged outside the gearbox bell 16.

List of numerical references

Gearbox actuator

Displacement unit

Control shaft first actuation mechanism second actuation mechanism control module selection module control rod control finger ejection element / disengagement finger piston rack swivel wing piston spring gearbox bell valve plate first actuator electric pump second electric pump actuator

Claims (10)

claims 1. Gearbox actuator (1) intended to engage and disengage the gears and / or to change the gears of a gearbox of a motor vehicle, comprising a displacement unit (2) for displacement in translation and in rotation of a control shaft (3) provided with a first actuation mechanism (4), which is fixed to the control shaft (3) and which is designed to actuate a first set of wheels, and a second actuating mechanism (5), which is fixed to the drive shaft (3) and which is designed to actuate a second set of wheels, characterized in that the first actuating mechanism (4) is arranged on one side of the displacement unit (2) and the second actuation mechanism (5) is arranged on the other side of the displacement unit (2). 2. Gearbox actuator (1) according to claim 1, characterized in that the gearbox actuator (1) is a hydraulic gearbox actuator (1). 3. Gearbox actuator (1) according to claim 1 or 2, characterized in that the first actuation mechanism (4) is arranged at one of the axial ends of the control shaft (3) and the second actuation mechanism (5) is arranged at the other axial end of the control shaft (3). 4. Gearbox actuator (1) according to any one of claims 1 to 3, characterized in that the displacement unit (2) allowing axial sliding and / or rotation of the control shaft (3 ) is arranged on the control shaft (3) between the first actuation mechanism (4) and the second actuation mechanism (5). 5. Gearbox actuator (1) according to any one of claims 1 to 4, characterized in that the first actuation mechanism (4) comprises a control finger (9) and / or the second mechanism actuation (5) comprises a control finger (9). 5 6. Gearbox actuator (1) according to claim 5, characterized in that the first actuation mechanism (4) further comprises at least one disengagement finger (10) and / or the second actuation mechanism ( 5) further comprises at least one disengagement finger (10). 7. Gearbox actuator (1) according to claim 5 or 6, characterized in that the control finger (9) of the first actuation mechanism (4) and the control finger (9) of the second actuation mechanism actuation (5) are arranged on the control shaft (3) such that only one of the 15 two control fingers (9) are each in an actuating position. 8. Gearbox actuator (1) according to any one of claims 1 to 7, characterized in that the gearbox actuator 20 (1) is designed to be arranged inside a gearbox bell (16). 9. System pack composed of a gearbox actuator (1) according to any one of claims 1 to 8, of at least one electric actuator of 25 pump (18, 19) and a valve plate (17), in which the gearbox actuator (1) is designed to be mounted inside a gearbox bell (16 ), and the pump actuator (18, 19) and the valve plate (17) are each designed to be mounted inside or outside the gearbox housing (16). 10. System composed of a system pack according to claim 9 and a gearbox bell (16), in which a gearbox actuator (1) is arranged and fixed inside the gearbox bell gear (16), and an electric pump actuator (18, 19) and a valve plate 5 (17) are arranged and fixed each inside or outside the gearbox bell (16 ).