RU2615801C2 - Gear shift control device for automatic transmission - Google Patents

Abstract

FIELD: transportation.

SUBSTANCE: gear shift control device for the automatic transmission (1) comprises the selection drive (200) the transition drive (100), the mechanism (200a, 201, 202) reducing the selection movement, the mechanism (10a, 11, 102) reducing the transition movement, and the transition module (50 ) driven to select two gears. The transition module (50) and the reducing mechanisms are located inside the housings (10, 11) of the box (1), and the drives (100, 200) are located outside of the box.

EFFECT: compactness of gear shift mechanisms.

9 cl, 6 dwg

Description

The invention relates to an internal gearshift control device for a manual gearbox of a motor vehicle.

It relates to an internal gearshift control device, such as a horizontally located internal control module, which transfers translational movements to the forks in one and the other direction from the equilibrium position.

In particular, an object of the invention is a gearshift control device for an automatic transmission enclosed in a mechanism housing adjacent to a clutch housing, comprising a selection drive, a transition drive, a selection movement reduction mechanism, a transition movement reduction mechanism, and a transition module driven by these mechanisms for selection of two gears by introducing a lever into the forks and for engaging the gear by moving the selected fork with the shift lever.

This type of control is disclosed, in particular, in document FR 2797018, which describes an internal control module comprising an axis that is free to rotate and locked in translational motion, on which the fork locking elements are installed at rest. This axis is covered by a tubular element with levers mounted on it, actuating the forks. The drive levers are driven by a tubular element and can go into one or the other of the forks. Thus, the choice of the fork occurs using a rotational movement. The drive levers fixedly connected to the tubular element are driven in translational motion by this tubular element, which is controlled by a node from the axis and the transition lever. The gear shift corresponds to the translational motion.

The end of the axis of the control module may exit the end of the box body and has a lever. The transition axis can also exit the housing. The movements corresponding to the choice of the fork and the inclusion of the transmission may be different and they are provided by two drives installed outside the box, by means of gearboxes. Installing drives outside the box, called add-ons, is a problem of protection and cost, since the elements that make up the gearboxes must have their own housing, which also supports the corresponding electric drive.

FR 2796697 discloses a device inside a box and therefore referred to as an “add-in”. This internal control device comprises a drum or cylinder with cams. It is equipped with a ramp and a coaxial sleeve that slides along the specified cylinder with a pin fixedly connected to the sleeve, which interacts with the groove. At its outer periphery, the sleeve comprises means for selecting various gear selectors. Means of choice are moved in rotation by a gear transmission, which is associated with the drive means.

This system provides only sequential speed transitions, that is, it does not allow transmission to pass.

The objective of the invention is to create a compact control device integrated in the gearbox, which fully preserves the integrity of the internal control of the corresponding manual gearbox and which allows transmission to be skipped.

In this regard, according to the invention, the transition module and reduction mechanisms are located inside the case of the box, while the drives are located outside this box.

Preferably, the selection movement is the rotation of the transition module, carried out by means of a tubular element, which covers the reference axis of the module and on which the gear lever is made.

The device may include a translational axis mounted inside the box parallel to the transition control module and providing translational movement of the tubular element with a transition lever mounted on it.

Other features and advantages of the present invention will be more apparent from the following description of a non-limiting embodiment of the invention with reference to the accompanying drawings.

In FIG. 1 shows a gearbox, general appearance;

in FIG. 2 shows internal mechanisms, general view;

in FIG. 3 shows the control mechanisms, a general view;

in FIG. 4 shows transition mechanisms, general view;

in FIG. 5 shows the axis of translational movement, complete view;

in FIG. 6 shows a selection mechanism, a general view.

In FIG. 1 shows a General view of the gearbox 1, the housing of which consists of two parts: from the clutch housing 10 and from the mechanism housing 11. Two electrical control drives are installed on the mechanism housing 11: a transition control drive 100 and a selection control drive 200, respectively.

In FIG. 2, where the drives and the case 11 of the mechanism are removed, the internal mechanisms of the box are shown: the input shaft 20, the secondary shaft 21 connected to it, the reverse reverse shaft 22 assembled with its rocker 23 for engaging the intermediate reverse gear, the axle 40 assembly and the inner control module 50 assembly.

In FIG. 3 shows in more detail the mechanisms controlled by the drive devices. Forks of the fifth gear 41, third-fourth gears 42 and first-second gears are mounted on the axle 40 of the forks assembly. Each fork controls the movement of the sliding sleeve: the sliding sleeve 44 of the fifth gear, the sliding sleeve 45 of the third to fourth gears and the sliding sleeve 46 of the first to second gears. The internal transition control module 50 includes:

- the reference axis 51,

- an internal lock lock 52, comprising a selection rotation limit lever 52a and locking sectors 52 that engage in grips of unselected forks, shown only in FIG. 6,

- a tubular element 53, covering the axis 51, containing the drive shoulder 53A with a transition lever (not shown) that moves the forks, cam 54 reversing contactor and ball mechanism 55.

In FIG. 4 and 5 show the transition action. The gear is engaged by moving the sliding clutch from its neutral position to the engaged position with the freewheel. The sliding sleeve, yoke and junction module move in the direction of the parallel axes of the junction module and the yoke axis. The transition module 50 is driven by a transition control device comprising an electric drive 100, at the end of the shaft of which goes into the housing 11, a gear 100a is installed, and an intermediate gear gear 101 located inside the box and held in the axial direction between the two supporting sides belonging respectively to the clutch housing 10 and to the mechanism housing 11. The intermediate gear 101 transmits rotational motion to the nut 102 through its peripheral teeth. A nut 102 is mounted on the axis 103 of the translational motion. It is axially locked between the housings and has an internal thread (not shown) by which it converts its rotational motion into the translational motion of the translational axis 103. The direction of rotation of the nut 102 determines the direction of translation of the axis 103.

In FIG. 5 shows the translational assembly axis 103 and its threaded portion 103a interacting with the nut 102. The translational axis 103, mounted parallel to the transition module, transfers its movements to the tubular element 53 of the module 50 through the lever 104, which ends with two branches 104a, covering the shoulder 53a of the tubular member 53. In an embodiment, the end of the arm may simply be secured in an annular groove (not shown) of the tubular member 51 by means of a retaining ring (not shown).

The selection drive device shown in FIG. 6, consists of an electric drive 200, at the end of the shaft of which enters the housing 11, a gear 200a is installed, and from an intermediate gear gear 201. The gear 201 is located inside the box. It is held in the axial direction between two supporting sides, one of which belongs to the clutch body 10, and the other to the mechanism body 11, and transmits rotational motion to the nut 202. The nut 202 is an angular sector with teeth on its periphery, which is fixed on lock 52 internal lock.

The selection movement is the rotation of the transition module 50. The selection actuator moves in the angular direction a transition lever (not visible) mounted on the tubular member 53 into the corresponding grips of the fork, namely, gripper 47 for the fifth gear fork, gripper 48 for the third-fourth gear fork and gripper 49 for the first-second fork gears.

In conclusion, it should be noted that the integration of reduction mechanisms into the gearbox allows reducing the dimensions of the transmission and that the transition and selection movements carried out by independent control devices make it possible to skip gears and change the gear ratio inconsistently.

Claims (9)

1. A gearshift control device for an automatic transmission (1) enclosed in a mechanism housing (11) adjacent to a clutch housing (10), comprising a selection drive (200), a transition drive (100), a mechanism (200a, 201, 202) reduction of the motion of choice, the mechanism (100a, 101, 102) of the reduction of the motion of the transition and the module (50) of the transition driven by these mechanisms to select two gears by introducing the shift lever into the grip (47, 48, 49) of the fork and to engage the gear by move the selected fork (41, 42, 43) using the shift lever characterized in that the transition module (50) and reduction mechanisms are located inside the cases (10, 11) of the box (1), and the drives (100, 200) are located outside this box, while the movement reduction mechanism (200a, 201, 202) The selection includes an intermediate gear (201), configured to transmit rotational motion to a nut (202), which is fixed to the lock (52) of the internal locking of the transition mechanism, preventing the movement of unselected grippers (47, 48, 79) of the fork. 2. The control device according to claim 1, characterized in that the selection movement is the rotation of the transition module (50), carried out using a tubular element (53), which covers the reference axis (51) of the transition module (50) and on which the transition lever is mounted gears. 3. The control device according to claim 1, characterized in that it contains an axis (103) of translational motion mounted inside the box (1) parallel to the transition module (50) and providing translational movement of the tubular element (53). 4. The control device according to claim 3, characterized in that a transverse lever (104) is mounted on the axis (103) of the translational movement, enveloping the tubular element (53) at its end with the possibility of ensuring its translational movement. 5. The control device according to claim 4, characterized in that the end (104a) of the lever (104) covers the shoulder (53a) of the tubular element (53). 6. The control device according to claim 4, characterized in that the end (104a) of the lever (104) is fixed in the annular groove of the tubular element (53) by means of a retaining ring. 7. The control device according to claim 1, characterized in that the intermediate gear gear (201) is located in the axial direction between the two supporting sides belonging respectively to the clutch housing (10) and the gear box housing (11) (1). 8. The control device according to claim 1, characterized in that the nut (202) is an angular sector with teeth on the periphery. 9. The control device according to claim 1, characterized in that the mechanism (100a, 101, 102) for reducing the motion of the transition contains an intermediate gear gear (101) located inside the box and held in the axial direction between the two supporting sides belonging respectively to the housing ( 10) the clutch and to the body (11) of the mechanism.

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