Vehicle shift-by-wire device

• US 10,641,387 B2
• Filed: 11/23/2018
• Issued: 05/05/2020
• Est. Priority Date: 11/24/2017
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Morise, Masaru
• Primary Examiner(s): Young, Edwin A
• Application Number:
  US16/199,033
• Publication Number:
  US 20190162301A1
• Time in Patent Office: Days
• CPC Class Codes: F16H 2061/122 Avoiding failures by using redundant parts
• CPC Class Codes: F16H 2061/1268 Electric parts of the controller, e.g. a defect solenoid, wiring or microprocessor
• CPC Class Codes: F16H 2061/247 Detents for range selectors
• CPC Class Codes: F16H 2063/423 Range indicators for automatic transmissions, e.g. showing selected range or mode
• CPC Class Codes: F16H 59/10 comprising levers
• CPC Class Codes: F16H 59/105 consisting of electrical switches or sensors
• CPC Class Codes: F16H 61/12 Detecting malfunction or potential malfunction, e.g. fail safe in control of hydrostatic gearing F16H61/4192; Circumventing or fixing failures
• CPC Class Codes: F16H 61/24 Providing feel, e.g. to enable selection
• CPC Class Codes: F16H 63/42 Ratio indicator devices

Abstract

A vehicle shift-by-wire device includes: a casing in which the shift actuator is disposed; a coupling member; and a connecting/disconnecting member disposed in the casing movably in the shifting direction and movably in a connecting/disconnecting direction crossing the shifting direction, and moved in the shifting direction integrally with the coupling member, wherein when the connecting/disconnecting member is held at an electrically shifting position in the connecting/disconnecting direction, the connecting/disconnecting member is coupled to the shift actuator and is moved in the shifting direction by the shift actuator to switch the shift corresponding position of the shift position switching mechanism via the coupling member, and wherein when the connecting/disconnecting member is moved to a manually shifting position in the connecting/disconnecting direction, the connecting/disconnecting member coupled to the shift actuator is disconnected so that the shift actuator is disabled to switch the shift corresponding position of the shift position switching mechanism.

Claims

1. A vehicle shift-by-wire device including an automatic transmission, a shift position switching mechanism configured to switch a shift position of the automatic transmission in accordance with a plurality of shift corresponding positions of the shift position switching mechanism and a shift actuator configured to electrically drive the shift position switching mechanism, the vehicle shift-by-wire device further comprising:

a casing in which the shift actuator is disposed;

a coupling member mechanically coupled to the shift position switching mechanism via an interlocking device and moved in a shifting direction to switch the shift corresponding position of the shift position switching mechanism; and

a connecting/disconnecting member disposed in the casing so as to be movable in the shifting direction and in a connecting/disconnecting direction crossing the shifting direction, and configured to be integrally moved in the shifting direction with the coupling member, wherein;

when the connecting/disconnecting member is held at an electrically shifting position in the connecting/disconnecting direction, the connecting/disconnecting member is coupled to the shift actuator and is moved in the shifting direction by the shift actuator to switch the shift corresponding position of the shift position switching mechanism via the coupling member, and

when the connecting/disconnecting member is moved to a manually shifting position in the connecting/disconnecting direction, the connecting/disconnecting member coupled to the shift actuator is disconnected so that the shift actuator is disabled to switch the shift corresponding position of the shift position switching mechanism.

2. The vehicle shift-by-wire device according to claim 1, further comprising:

a shift operation member disposed in the casing so as to be movable in the shifting direction such that when the connecting/disconnecting member is moved to the manually shifting position, the shift operation member is coupled to the connecting/disconnecting member, and manually operated to move to one of a plurality of predetermined shift selecting positions so that the connecting/disconnecting member is moved in the shifting direction and the shift corresponding position of the shift position switching mechanism is switched via the coupling member; and

a movement restriction mechanism disposed in at least one of the shift operation member and the connecting/disconnecting member, the movement restriction mechanism being configured to allow the connecting/disconnecting member of which the position in the shifting direction is defined in accordance with the shift corresponding position via the coupling member to be operated to move in the manually shifting direction and to couple the shift operation member only when the shift selecting position of the shift operation member coincides with the shift corresponding position of the shift position switching mechanism.

3. The vehicle shift-by-wire device according to claim 2, wherein the movement restriction mechanism includes an engagement concave portion and an engagement convex portion (i) disposed in one and the other of the shift operation member and the connecting/disconnecting member, (ii) allowed to fit to each other in the connecting/disconnecting direction, and (iii) allowed to be engaged relatively immovably in the shifting direction when the shift selecting position of the shift operation member coincides with the shift corresponding position of the shift position switching mechanism.

4. The vehicle shift-by-wire device according to claim 2, further comprising:

a selected position indicator indicating shift selecting positions and disposed in at least one of the casing and the shift operation member; and

a detent mechanism positioning the shift operation member at each of the plurality of shift selecting positions.

5. The vehicle shift-by-wire device according to claim 1, further comprising:

a connecting/disconnecting operation member disposed in the casing immovably in the shifting direction and movably in the connecting/disconnecting direction, the connecting/disconnecting operation member being configured to engage the connecting/disconnecting member relatively immovably in the connecting/disconnecting direction to operate the connecting/disconnecting member manually to move in the connecting/disconnecting direction; and

an electrical connector device disposed across the connecting/disconnecting operation member and the casing, the electrical connector device being configured to mechanically connect and disconnect an electrical connection cable such that (i) the electrical connector device is put into a connected state to enable the shift actuator to operate when the connecting/disconnecting operation member is operated to move, (ii) the connecting/disconnecting member is moved to the electrically shifting position, (iii) the electrical connector device is put into a disconnected state to make the shift actuator unable to operate when the connecting/disconnecting operation member is operated to move, and (iv) the connecting/disconnecting member is moved to the manually shifting position.

6. The vehicle shift-by-wire device according to claim 1, further comprising a momentary type shift position selecting device configured to be operated by a driver to alternatively select one of a plurality of shift positions of the automatic transmission and to return automatically to an original state after a selecting operation of the shift position is performed.

7. The vehicle shift-by-wire device according to claim 1, wherein:

the connecting/disconnecting member is configured to move pivotally around a shift center line that is the shifting direction and movably in a direction of the shift center line that is the connecting/disconnecting direction,

the connecting/disconnecting member is coupled relatively non-pivotally to an output member of the shift actuator disposed on the shift center line when the connecting/disconnecting member is operated to move to the electrically shifting position in the shift center line direction, and

the connecting/disconnecting member coupled to the output member is disconnected from the output member when the connecting/disconnecting member is operated to move to the manually shifting position in the center line direction.