JP2019099054A - Shift device - Google Patents

Abstract

To provide a shift device that allows downsizing of the device size.SOLUTION: A lock member 14 is held at an arbitrary unlock position by feedback control of a motor 18 based on an output of a position detection part 39 at the time of unlock actuation. At this normal time, conduction torque of the motor 18 is larger than a biasing force of a biasing member 32, so that switching of the lock member 14 to the unlock position is permitted. At the time of power failure, the biasing force of the biasing member 32 is larger than cogging torque of the motor 18, so that the lock member 14 at the unlock position moves in a lock direction by the biasing force of the biasing member 32 and locks to a locked part 35. Therefore, even during power failure, the lock member 14 can return to the lock position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a shift device provided with a shift lock function capable of locking the operation of a shift operation unit.

  Conventionally, for example, a shift device of a vehicle is equipped with a shift device provided with a shift lock function (shift lock device) that disables the operation of the shift operating unit (shift lever etc.) if the engine is not started ( Patent Document 1 etc.). In this type of shift lock device, the lock member is switched to the lock position or the unlock position by driving the actuator based on, for example, a switch signal of the switch portion provided in the shift operation unit, and the lock state and the unlock state are obtained. There is an electric type that switches the state.

  When the shift lock device is switched to the unlock state, for example, the actuator is operated in one direction to move the lock member in the lock position in the unlock direction against the biasing force of the biasing member. As a result, the lock member is disengaged from the locked portion of the shift operation unit, and the shift operation unit can be operated.

  On the other hand, when the shift lock device is switched to the lock state, for example, the actuator is operated in the other direction to allow the lock member at the unlock position to move in the lock direction by the biasing force of the biasing member. As a result, the lock member is locked to the locked portion of the shift operation portion, and the operation of the shift operation portion is disabled.

Unexamined-Japanese-Patent No. 2017-136962

  When the shift lock device is in the unlocked state, for example, the biasing force of the biasing member is realized by setting the biasing force of the biasing member to a value smaller than the cogging torque of the motor as the actuator. . As a result, after the shift lock device is switched to the unlock state, the lock member is held at the unlock position by the cogging torque of the motor even if the energization of the motor is stopped. When the shift lock device is returned to the locked state, the motor is energized again to operate the lock member, and the lock member is moved in the lock direction by the biasing force of the biasing member.

  By the way, when the shift lock device has the above-mentioned structure, when the shift lock device loses the power when the shift lock device is in the unlock state, the lock member is maintained at the unlock position. . That is, when the power is lost under the unlocked state, the lock member can not be returned to the locked state. In order to cope with this problem, a solenoid is added to cope with the loss of power. However, the size of the shift device has been reduced due to the need for the solenoid.

  An object of the present invention is to provide a shift device capable of reducing the device size.

  In the shift device that solves the above problem, the lock member is locked by being locked to the locked portion of the shift operation unit, and the lock is detected, and the lock detected in the configuration that disables operation of the shift operation unit. While monitoring the position of the lock member, which is biased in the locking direction by the biasing force of the biasing member at the time of unlocking, while monitoring the position of the member, the position detection unit outputting the detection signal in an analog form and the unlocking operation. And controlling the actuator so as to maintain the lock member in a disengaged state from the locked portion to maintain the lock member in the unlocked state, and when the power is lost under the unlocked state, the biasing member And a controller configured to shift the lock member to the lock position by the biasing force.

  According to this configuration, at the time of normal unlocking operation, by controlling the actuator based on the detection signal of the position detection unit, torque against the urging force of the urging member is applied to the lock member, and the lock member Hold at any unlock position. This makes it possible to secure the unlocked state of the shift lock device. In addition, when the power of the shift lock device is lost, the actuator is inactivated, but the lock member at this time is moved to the locked position by the biasing member. Therefore, when the power is lost, the shift lock device can be switched to the locked state. As described above, in the case of the present configuration, no separate member such as a solenoid is required to realize that the lock member is returned to the lock position when the power is lost. Therefore, the device size of the shift lock device can be small even if the shift of the lock member to the lock position is secured when the power is lost.

  In the shift device, it is preferable that the biasing force of the biasing member is set to take a larger value than the cogging torque of the motor as the actuator when the actuator is not energized. According to this configuration, when the power is lost, the lock member in the unlocked state can be more reliably returned to the locked state by the biasing member that generates a force larger than the cogging torque of the motor.

  In the shift device, it is preferable that the control unit maintain the unlocked state of the lock member by feedback control of the operation of the actuator based on a detection signal of the position detection unit. According to this configuration, it is possible to accurately position the lock member at the desired position by feedback control of the actuator.

  The shift device is provided with a cam portion provided rotatably around an eccentric axis and capable of switching the position of the lock member, and the control portion rotates the cam portion by the actuator so as to rotate the lock member. Preferably, switching between the lock position and the unlock position is performed. According to this configuration, it is possible to switch the lock position and the unlock position of the lock member by a simple configuration using the cam portion.

  In the shift device, preferably, the position detection unit outputs, as the detection signal, a signal whose value changes linearly in accordance with a change in position of the lock member. According to this configuration, it is easy to obtain the correlation between the position of the lock member and the output of the position detection unit, which is advantageous for preventing erroneous detection of the position of the lock member.

  According to the present invention, the device size can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram of the shift apparatus (shift lock apparatus) of one Embodiment. The schematic diagram of the shift pattern of a shift device. The block diagram which shows the electric constitution of shift lock device. FIG. 8 is an operation diagram showing a locked state of the shift lock device. The action | operation figure which shows the unlocking state of a shift lock apparatus. Explanatory drawing which shows the shift operation which can be operated in a locked state, and the shift operation inoperable. (A), (b) is an action | operation figure of the shift lock apparatus at the time of power loss.

Hereinafter, one embodiment of a shift device will be described according to FIGS. 1 to 7.
As shown in FIG. 1, the shift device 1 for a vehicle includes a shift operating unit 2 that is operated when switching the shift position of the vehicle, and a housing 3 that supports the shift operating unit 2 in an operable manner. The shift operation unit 2 is a lever type that switches the shift position by being turned around (swing operation) around a shaft 5 provided in the operation main body 4 extending in a lever shape.

  As shown in FIG. 2, in the shift pattern of this example, the shift position is set to “parking position (P position)”, “reverse position (R position)”, “neutral position” by operating the shift operation unit 2 in a linear direction. This is a four-position straight type that is switched to one of “N position” and “drive position (D position)”.

  Returning to FIG. 1, the shift device 1 includes a shift lock device 8 that can not operate the shift operation unit 2 unless the engine is started. The shift lock device 8 of this example electrically controls the lock mechanism 10 capable of locking the operation of the shift operation unit 2 based on the operation of the switch unit 9 provided in the shift operation unit 2 to perform shift operation. It is an electrical system that switches permission or non-permission. In the case of this example, the shift lock device 8 permits the shift operation by electrically switching the lock mechanism 10 to the unlocked state, for example, when the switch unit 9 is operated in a state where the engine is started. The switch unit 9 is, for example, a latch switch formed on the knob 11 of the shift operation unit 2 and outputs an on / off switch signal Sk.

  The shift lock device 8 includes a lock member 14 that can be locked to the shift operation unit 2 and an actuator 15 serving as a driving source of the lock member 14. The lock member 14 includes a main body portion 16 and a locking projection 17 locked to the shift operation portion 2. The lock member 14 is assembled to the housing 3 so as to be linearly reciprocable (in the direction of arrow A in FIG. 1) so as to take the lock or unlock position. The lock member 14 is disposed so as to be movable in the rotational radial direction of the shift operation unit 2 around the shaft 5. The lock member 14 linearly moves in the locking direction and the unlocking direction along, for example, a guide (not shown) provided on the housing 3 side. The actuator 15 includes, for example, a motor 18 and is electrically connected to the main substrate 21 of the shift device 1 through the motor substrate 19 and the wiring 20.

  A gear mechanism 25 is attached to the motor shaft 24 of the motor 18, and a lock member 14 is assembled to the housing 3 in an operable manner via a cam portion 26 interlocking with the gear mechanism 25. The cam portion 26 operates the lock member 14 based on the rotation of the motor 18, and rotates around the eccentric shaft 27 (in the direction of the arrow B in FIG. 1) to switch the position of the lock member 14. The gear mechanism 25 is, for example, a worm gear. The cam portion 26 is integrally rotatably connected to a worm wheel 29 that meshes with the worm 28. The cam portion 26 is formed in a shape having the projecting portion 30 on a part of the outer peripheral surface. The cam portion 26 is in contact with the curved surface portion 31 formed on the main body portion 16 of the lock member 14.

The lock member 14 is provided with a biasing member 32 for biasing the lock member 14 in the locking direction (the direction of the arrow A1 in FIG. 1). The biasing member 32 comprises, for example, a coil spring.
The shift operating portion 2 is provided with a locked portion 35 which is a locking portion of the lock member 14. The locked portion 35 is a first locked portion 35a to which the lock member 14 is locked when the shift operating portion 2 is at the P position, and the lock member 14 is locked when the shift operating portion 2 is at the R position And a third engaged portion 35c to which the lock member 14 is engaged when the shift operation unit 2 is at the N position or the D position. The partition wall 36 which separates the second engaged portion 35 b and the third engaged portion 35 c is formed in a projecting shape having a tapered surface. The locked portion 35 is set on an arc centered on the shaft 5.

  The shift lock device 8 has a power loss lock forced switching function that enables the lock mechanism 10 to be switched to the locked state when the power is lost. This is because, for example, when the lock member 14 is maintained in the unlocked state when the shift lock device 8 (shift device 1) falls into the power loss state when the lock mechanism 10 is in the unlocked state, the shift operation It is not preferable on the vehicle that the unit 2 can be operated freely. Therefore, when the power is lost, it is preferable to return the shift lock device 8 in the unlocked state to the locked state.

  In this case, the shift lock device 8 includes a position detection unit 39 that detects the position of the lock member 14. The position detection unit 39 includes a detection unit 40 provided in the lock member 14 and a sensing unit 41 provided on the housing 3 side (in this example, the main substrate 21). The position detection unit 39 is preferably, for example, a magnetic detection type. In this case, the detected part 40 is a magnet, and the sensing part 41 is a magnetic sensor. The position detection unit 39 (sensing unit 41) outputs the detected position of the lock member 14 as an analog detection signal St. In particular, in the case of this example, the position detection unit 39 outputs, as the detection signal St, a signal whose value changes linearly in accordance with the change in position of the lock member 14.

  As shown in FIG. 3, the shift lock device 8 includes a control unit 44 that controls the operation of the shift lock device 8. The control unit 44 receives the switch signal Sk of the switch unit 9 and the detection signal St of the position detection unit 39. The control unit 44 controls the actuator 15 based on the switch signal Sk and the detection signal St to control the operation of the shift lock device 8 (switching between locking and unlocking).

  The control unit 44 of this example monitors the position of the lock member 14 urged in the locking direction by the urging force of the urging member 32 at the time of unlocking operation by the detection signal St, while the lock member 14 is the locked portion. The actuator 15 is controlled to maintain the disengagement state from 35, and the lock member 14 is maintained in the unlocked state. Thus, based on the detection signal St of the position detection unit 39, the control unit 44 according to the present embodiment causes the energization torque "Ta" of the motor 18 to take a larger value than the urging force "Tb" of the urging member 32. The motor 18 is controlled to maintain the lock member 14 in the unlocked state.

  The control unit 44 controls the motor 18 such that the motor 18 and the biasing member 32 have a relationship of “Ta> Tb” when switching the shift lock device 8 to the unlocked state, and the lock member 14 can be set to any intermediate position. Hold in position. The intermediate position is, for example, an arbitrary one point in a range (unlocking range) from the position where the locking member 14 is pulled out of the locked portion 35 to the deepest position in the unlocking direction. The motor control is preferably, for example, feedback control. The control unit 44 controls the motor 18 by PWM (Pulse Width Modulation) to adjust the voltage or current applied to the motor 18 to optimize the torque generated in the motor 18 (lock member 14 in the lock position). Adjust the value as needed).

  Further, the biasing force "Tb" of the biasing member 32 is set to take a value larger than the cogging torque "Tc" of the motor 18 when the motor 18 is not energized. This may be realized, for example, by changing the motor 18 to a large biasing member 32 having a large biasing force "Tb" without changing it conventionally, or the biasing member 32 has not been changed conventionally. It may be realized by changing to a motor 18 having a small cogging torque "Tc". Since the motor 18 and the biasing member 32 have a relationship of “Tb> Tc” when the motor 18 is not energized, the locking member is biased by the biasing force of the biasing member 32 when the power of the shift lock device 8 in the unlocked state is lost. 14 moves to shift to the locked state.

Next, the operation and effects of the shift device 1 (shift lock device 8) will be described with reference to FIGS.
As shown in FIG. 4, it is assumed that the switch unit 9 is operated when the shift operation unit 2 is at the P position. At this time, since the control unit 44 receives the switch signal Sk with operation from the switch unit 9, the cam unit 26 is rotated in the unlocking direction (arrow B2 direction in FIG. 4) by rotating the motor 18 in one direction. Let In the case of this example, the energizing torque "Ta" of the motor 18 is set to be larger than the biasing force "Tb" of the biasing member 32, so the locking member 14 is released even if the biasing member 32 is present. Movement in the locking direction is possible. When the cam portion 26 rotates in the unlock direction, the cam member 26 slides the lock member 14 in the unlock direction (direction of arrow A2 in FIG. 4) against the biasing force of the biasing member 32.

  As shown in FIG. 5, when the lock member 14 slides in the unlocking direction and separates from the first engaged portion 35a, the shift lock device 8 switches to the unlocked state. At this time, the control unit 44 keeps the lock member 14 at the intermediate position (unlocking range) while performing feedback control of the motor 18 based on the detection signal St of the position detection unit 39. Thus, the state in which the lock member 14 is released from the first engaged portion 35 a is maintained, and the unlock state of the shift lock device 8 is maintained.

  When the shift lock device 8 is in the unlocked state, the operation of the shift operation unit 2 is permitted. Therefore, the shift operation unit 2 can be operated from the P position to the R position, the N position, and the D position. The unlocking state of the shift lock device 8 is preferably maintained while the switch unit 9 is operated.

  In addition, it is assumed that the switch unit 9 is not operated because the finger is released from the switch unit 9 of the shift operation unit 2 or the like. At this time, since the control unit 44 receives the switch signal Sk without operation from the switch unit 9, the cam unit 26 is rotated in the locking direction (the arrow B1 direction in FIG. 5) by rotating the motor 18 in the other direction. . When the cam portion 26 rotates in the locking direction, the push-up by the cam portion 26 is released, and the locking member 14 slides in the locking direction (arrow A1 direction in FIG. 5) by the biasing force of the biasing member 32.

  Returning to FIG. 4, when the lock member 14 slides in the locking direction and is locked to the locked portion 35 (FIG. 4 is the first locked portion 35 a), the shift lock device 8 is locked. As a result, the operation of the shift operation unit 2 becomes impossible. Therefore, the operation of the shift operation unit 2 can be restricted.

  As shown in FIG. 6, when the shift operation is locked when the shift operation unit 2 is at the D position, the shift operation to the N position is possible. When the shift operation is locked when the shift operation unit 2 is at the N position, although the operation to the D position is possible, the operation to the R position is not possible. When the shift operation is locked when the shift operation unit 2 is at the R position, although the operation to the N position is possible, the operation to the P position is not possible. When the shift operation is locked when the shift operation unit 2 is at the P position, the operation to the R position is not possible.

  As shown in FIG. 7A, for example, when the shift operation unit 2 is at the N position and the shift lock device 8 is in the unlocked state, it is assumed that the power of the shift lock device 8 (shift device 1) is lost. Here, in the case of this example, the biasing force "Tb" of the biasing member 32 is set larger than the cogging torque "Tc" of the motor 18. Therefore, when the power is lost, the lock member 14 is in the locking direction (FIG. 7A) while the cam portion 26 is rotated in the locking direction (the arrow B1 direction of FIG. 7A) by the biasing force of the biasing member 32. It slides in the direction of arrow A1) and shifts to the locked state (see FIG. 7 (b)). Therefore, it is possible to return the shift lock device 8 to the locked state when the power is lost.

  Now, in the case of the present embodiment, at the time of unlocking operation (when power is supplied), the motor 18 is controlled based on the detection signal St of the position detection unit 39 to set the urging force "Tb" of the urging member 32. The resisting torque (energized torque Ta of the motor 18) is applied to the lock member 14 to hold the lock member 14 at an arbitrary unlock position. This makes it possible to ensure the unlocked state of the shift lock device 8. Further, when the power of the shift lock device 8 is lost, the motor 18 is inactivated, but the lock member 14 at this time takes a motion to be switched to the lock position by the biasing member 32. Therefore, when the power is lost, the shift lock device 8 can be switched to the locked state. As described above, in the case of the present configuration, no separate member such as a solenoid is required to realize that the lock member 14 is returned to the lock position when the power is lost. Therefore, the device size of the shift lock device 8 may be reduced even if the shift of the lock member 14 to the lock position is secured when the power is lost.

  The biasing force "Tb" of the biasing member 32 is set to be larger than the cogging torque "Tc" of the motor 18 when the motor 18 is not energized. In this case, the lock member 14 in the unlocked state can be more reliably returned to the locked state by the biasing member 32 that generates a force larger than the cogging torque "Tc" of the motor 18 when the power is lost.

  The control unit 44 feedback-controls the operation of the motor 18 based on the detection signal St of the position detection unit 39 to maintain the unlocked state of the lock member 14. Therefore, the feedback control of the motor 18 can accurately position the lock member 14 at a desired position.

  The control unit 44 rotates the cam unit 26 by the motor 18 to switch the lock position of the lock member 14 and the unlock position. Therefore, the lock position and the unlock position of the lock member 14 can be switched by the simple configuration using the cam portion 26.

  The position detection unit 39 outputs, as the detection signal St, a signal whose value changes linearly according to the change in position of the lock member 14. Therefore, since the correlation between the position of the lock member 14 and the output of the position detection unit 39 can be easily obtained, it is advantageous for preventing erroneous detection of the position of the lock member 14.

The present embodiment can be modified as follows. The present embodiment and the following modifications can be implemented in combination with one another as long as there is no technical contradiction.
The structure for operating the lock member 14 by the rotational movement of the motor 18 is not limited to the structure using the cam portion 26. Even if the lock member 14 is operated by using the motor rotation as a driving force, the structure is appropriately changed. Good.

-Motor control should just be control which can hold | maintain the lock member 14 in an intermediate position (unlocking range).
The position detection unit 39 is not limited to the magnetic sensor, and may be changed to another type such as an optical sensor.

The locking member 14 is not limited to a member that moves in linear reciprocating motion, and may be changed to another type, such as one that moves in rotation.
The shift device 1 is not limited to the lever type, and may be a rotary type in which the shift operation unit 2 is rotated.

The actuator 15 is not limited to the motor 18, and may be changed to another member such as a solenoid.
The output waveform of the position detection unit 39 may have any waveform change as long as it is analog.

The biasing member 32 is not limited to a coil spring, and can be changed to another member.
The shift pattern is not limited to the 4-position straight type, and may be, for example, three positions or five positions or more. Also, the shift operation direction is not limited to straight, and may be, for example, a shift pattern that changes in both the shift direction and the select direction.

The number and shape of the engaged portions 35 can be appropriately changed to patterns other than the embodiment.
The shift lock device 8 can be applied to various vehicles.
The shift device 1 is a mechanical type in which the shift operation unit 2 and the transmission are directly connected by a wire or the like, or an electric type in which the operation of the shift operation unit 2 is electrically detected and the transmission is controlled by an electric signal. Any of (shift by wire) may be used.

  DESCRIPTION OF SYMBOLS 1 ... Shift apparatus, 2 ... Shift operation part, 8 ... Shift lock apparatus, 10 ... Lock mechanism, 14 ... Lock member, 15 ... Actuator, 18 ... Motor, 26 ... Cam part, 27 ... Eccentric axis, 32 ... Energization Member 35: locked portion 35a: first locked portion 35b: second locked portion 35c: third locked portion 39: position detection unit 44: control unit St: detection signal.

Claims (5)

In the shift device, in which the lock member is locked by being locked to the locked portion of the shift operation portion, and the operation of the shift operation portion is disabled.
A position detection unit that outputs the detected position of the lock member as an analog detection signal;
At the time of unlocking operation, while the position of the lock member biased in the lock direction by the biasing force of the biasing member is monitored by the detection signal, the lock member is maintained in the disengaged state from the locked portion The actuator is controlled to maintain the unlocked state of the lock member, and when the power is lost under the unlocked state, the control unit causes the lock member to shift to the lock position by the biasing force of the biasing member. Shift device. The shift device according to claim 1, wherein the biasing force of the biasing member is set to have a value larger than a cogging torque of a motor as the actuator when the actuator is not energized. 3. The shift device according to claim 1, wherein the control unit maintains the unlocked state of the lock member by performing feedback control of the operation of the actuator based on a detection signal of the position detection unit. It has a cam portion provided rotatably around an eccentric shaft and capable of switching the position of the lock member,
The shift device according to any one of claims 1 to 3, wherein the control unit rotates the cam unit by the actuator to switch between the lock position and the unlock position of the lock member. The shift device according to any one of claims 1 to 4, wherein the position detection unit outputs, as the detection signal, a signal whose value linearly changes according to a change in position of the lock member.