JP6171002B2 - Gear shift control device for automatic transmission - Google Patents

Description

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

  The present invention relates to an internal control module type internal gear shift control device or adjustment device which is arranged horizontally and transmits a movement movement to a fork on both sides of an equilibrium position.

  More specifically, the present invention provides a selection motor, a shift motor, a mechanism for decelerating the selection movement, a mechanism for decelerating the shift movement, and a shift member in a fork claw. A clutch module comprising a shift module actuated by these mechanisms to select one gear, as well as to move the selected fork using the shift member, to engage the gear. The present invention relates to a gear shift control device for an automatic transmission that is enclosed in a mechanism housing that comes into contact therewith.

  This type of control is specifically illustrated in document FR27997018, which describes an internal control module that is constituted by a rotatable shaft, is fixed with respect to movement and supports the element that locks the fork into a dormant state. To do. This shaft is surrounded by a cylindrical element that supports the member that actuates the fork claw. The actuating member is driven to rotate by the tubular element and can be placed on one side or the other side of the fork claw. The fork selection is thus obtained by rotational movement. The actuating member fixedly connected to the tubular element is driven to move by the tubular element controlled by an assembly comprising a shaft and a shift member. The gear engagement movement corresponds to the movement movement.

  The end of the shaft of the control module appears at the end of the box housing and can carry a lever. A shift shaft can also emerge from the housing. The movements corresponding to the selection of the fork and the engagement of the gears are independent movements and are provided by two actuators adapted to the outside of the box using a reduction mechanism. Actuator adaptation outside the box, referred to as an “add-on” device, presents protection and cost challenges as long as the elements that make up the reduction mechanism must have their own housings that support the corresponding electrical actuators. is there.

  The document FR2796697 discloses a device called “add-in” because it is inside the box. This internal control device has a cam-type barrel or cylinder. The internal control device is provided with a coaxial bush that is fixedly connected to the lamp and the bush and slides on the cylinder via a pin cooperating with the groove. The bushing comprises means for selecting various members on its outer periphery for engaging the gear. The selection means is rotated and displaced by a gear train connected to the drive means.

  This system only allows continuous gear shifts, i.e. gears cannot be skipped.

  The object of the present invention is to produce a compact control device which is incorporated in a gear box and retains all the internal control of the corresponding manual box and allows gear skipping.

  For this purpose, the present invention proposes that the shift motor and the speed reduction mechanism are arranged inside the box housing, while the actuating motor is located outside.

  Preferably, the selection movement is a rotation of the shift module performed using a cylindrical element that surrounds the support shaft of the module and supports the gear shift member.

  This device can be provided with a moving shaft mounted inside the box in parallel with the shift control module, ensuring the movement of the cylindrical element supporting the shift member.

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

FIG. 1 is an overall external view of the gear box. FIG. 2 is an overall view of the internal mechanism. FIG. 3 is an overall view of the control mechanism. FIG. 4 is an overall view of the shift mechanism. FIG. 5 is a view of the assembled moving shaft. FIG. 6 is an overall view of the selection mechanism.

  In FIG. 1, the entire gear box 1 can be seen, and the housing has two parts, a clutch housing 10 and a mechanism housing 11. The mechanism housing 11 supports two electric control motors, a shift control motor 100 and a selection control motor 200.

  In FIG. 2, the actuating motor and mechanism housing 11 is removed and provided with a tilting member for engagement with the internal mechanism of the box, namely the primary shaft 20, the assembled secondary shaft 21, and the reverse intermediate pinion 23. The assembled reverse intermediate shaft 22, the assembled fork shaft 40 and the assembled internal control module 50 can be seen.

  FIG. 3 shows details of the mechanism controlled by the actuator. The assembled fork shaft 40 supports the fork 41 of the fifth gear, the fork 42 of the third / fourth gear, and the fork of the first / second gear. Each fork controls the movement of the sliding gear, that is, the sliding gear 44 of the fifth gear, the sliding gear 45 of the third / fourth gear, and the sliding gear 46 of the first / second gear. The internal shift control module 50 includes an interlock key 52 comprising a support shaft 51, an arm 52a for limiting angle selective rotation, and a lock portion 52b inserted into a non-selected fork claw, also seen in FIG. From a cylindrical element 53 comprising a shoulder 53a surrounding the shaft 51 and carrying a shift member (not shown) for moving the fork claw, a reverse contact contactor cam 54 and a ball member 55 Composed.

  4 and 5 show the shift operation. Gear engagement is obtained by moving the sliding gear from its neutral position to a position that engages a movable pinion. The sliding gear, fork, and shift module move in the direction of the parallel axis of the shift module and fork shaft. The shift module 50 includes an electric motor 100 in which an end portion of a shaft introduced into the housing 11 supports the pinion 100a, and an intermediate return pinion 101 placed inside the box. The shift module 50 belongs to the clutch housing 10 and the mechanism housing 11, respectively. It is driven by a shift actuating device comprising an intermediate return pinion 101 held in the axial direction between two abutment surfaces. The intermediate pinion 101 transmits rotational motion to the nut 102 by its outer peripheral teeth. The nut 102 is supported by the moving shaft 103. The nut 102 is closed axially between the housings and has an inner thread (not shown) as a result of converting its rotational movement into a moving movement of the moving shaft 103. The direction of rotation of the nut 102 determines the direction of movement of the shaft 103.

  FIG. 5 shows the threaded portion 103 a of the moving shaft 103 cooperating with the assembled moving shaft 103 and nut 102. The moving shaft 103 provided in parallel with the shift module transmits the movement of the moving shaft 103 to the tubular element 53 of the module 50 via the arm 104 that terminates in two branches 104a surrounding the shoulder 53a of the tubular element 53. To do. In a variant, the end of the arm can be easily fixed in a groove (not shown) in the tubular element 51 via a stop ring (not shown).

  The selective actuator shown in FIG. 6 includes an electric motor 200 in which an end portion of a shaft introduced into the housing 11 supports the pinion 200a, and an intermediate return pinion 201. The pinion 201 is located inside the box. The pinion 201 is held in the axial direction between two contact surfaces, one of which belongs to the clutch housing 10 and the other of which belongs to the mechanism housing 11, and transmits the rotational motion to the nut 202. The nut 202 has a square fan shape that is fixed to the interlock key 52 with teeth around the nut 202.

  The selection movement is the rotation of the shift module 50. The selective actuating device is a corresponding fork claw, namely a claw 47 for a fifth gear fork, a claw 48 for a third / fourth gear fork, and a claw for a first / second gear fork. 49, the angle of a shift member (not shown) supported by the tubular element 53 is changed.

  In conclusion, by incorporating a speed reduction mechanism within the gearbox, the transmission space requirements are reduced, and discontinuous gear skips and gear changes are realized through shift and selection movements performed by independent controllers. I must stress that.

Claims (9)

A gear shift control device for an automatic transmission (1) enclosed in a mechanism housing (11) abutting on a clutch housing (10),
A selection motor (200);
A shift motor (100);
A selective motion deceleration mechanism (200a, 201, 202) for decelerating the selective motion ;
A shift motion decelerating mechanism (100a, 101, 102) for decelerating the shift motion ;
Placing the shift member in the fork claw (47, 48, 49) to select the two gears and using the shift member to move the selected fork (41, 42, 43) Accordingly, in order to engage the gears, Bei example a shift module (50) which is actuated by the selection motion reduction mechanism and the shift motion reduction mechanism,
While the shift module (50) , the selective motion reduction mechanism, and the shift motion reduction mechanism are disposed inside the clutch housing (10) and the mechanism housing (11) of the automatic transmission (1), the selection motor (200) and the shift motor (100) are installed on the outside thereof ,
The selection movement is rotation of the shift module (50) performed using a cylindrical element (53) that surrounds a support shaft (51) of the shift module (50) and supports a gear shift member; Gear shift control device for automatic transmission (1). In parallel with the shift module (50), it is provided with a moving shaft (103) provided inside the automatic transmission (1) to ensure the movement of the cylindrical element (53). The control device according to claim 1 . The moving shaft (103) supports the transverse arm (104), and the end of the transverse arm (104) surrounds the tubular element (53), thereby moving the tubular element (53). The control device according to claim 2 , wherein the control device can be made to operate. 4. Control device according to claim 3 , characterized in that the end (104a) of the transverse arm (104) surrounds a shoulder (53a) of the tubular element (53). The control device according to claim 3 , wherein the end (104a) of the transverse arm (104) is fixed to a groove of the tubular element (53) via a stop ring. The selective motion reduction mechanism (200a, 201, 202) is held in the axial direction between two contact surfaces belonging to the clutch housing (10) and the mechanism housing (11) of the automatic transmission (1), respectively. Control device according to any one of claims 1 to 5 , characterized in that it comprises an intermediate return pinion (201). The intermediate return pinion (201) transmits rotational motion to a nut (202) secured to an interlock key (52) of a shift mechanism that prevents motion of the unselected fork claw (47, 48, 79). The control device according to claim 6 , wherein: 8. Control device according to claim 7 , characterized in that the nut (202) is a square sector with teeth around it. The shift motion reduction mechanism (100a, 101, 102) is an intermediate return pinion (101) placed inside the automatic transmission , and belongs to the clutch housing (10) and the mechanism housing (11), respectively. 9. Control device according to any one of claims 1 to 8 , characterized in that it comprises an intermediate return pinion (101) held axially between two abutment surfaces.

Images