JP2003028293A - Gear shift control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a reliability by providing a backup means for mechanically switching a gear shift range at the time of failure of an electric motor, etc. SOLUTION: A control unit 18 rotates an output shaft 15 by the electric motor 6 according to the mode of operation of a selector switch 19 to switch the gear shift range of an automatic transmission. Also, a first lever 22 installed on the output shaft 15 in locked state and a second lever 24 rotatingly operated by a gear shift lever 28 through a wire 29 are installed in a backup gear shift range switching device 21. When the electric motor 6 fails, the first lever 22 is rotated by the gear shift lever 28 through the second lever 24, and the transmission is selectively switched to a P range or an N range. Thus, when the motor fails, countermeasures such as stoppage and towing of the vehicle can be smoothly performed to increase the reliability.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift control device for a vehicle which is preferably used for electrically switching a shift range of a transmission mounted on, for example, an automobile.

[0002]

2. Description of the Related Art Generally, an automatic transmission (automatic transmission) mounted on, for example, an automobile is provided with a shift control device for switching a shift range by a driver of the vehicle. As such a shift control device, an electric shift control device is known in which a shift range is switched by an electric motor according to a switch operation of a driver (for example, Japanese Patent Laid-Open No. 5-99326).
No. 5-306750, etc.).

An electric shift control device according to this type of prior art has a casing provided in a vehicle, and the casing is connected to an electric motor and an output side of the electric motor via a reduction gear mechanism or the like. Output shaft is provided. Further, the output shaft projects to the outside of the casing, and the projecting end side is connected to a range switching valve switchably provided in a hydraulic circuit of the transmission or the like.

Here, the range switching valve is displaced to a plurality of switching positions in accordance with the rotation angle of the output shaft, so that the shift range of the transmission is changed to, for example, the parking (P) range or the reverse (R) range. , Neutral (N) range, drive (D) range, second (S) range, low (L) range, and the like.

Further, the shift control device is provided with a control unit as motor control means for controlling the electric motor, and the input side of the control unit is provided with a shift range switch provided near the driver's seat or the like. The switch is connected.

When the driver operates the changeover switch during driving of the vehicle, the changeover switch outputs a shift operation signal to the control unit. As a result, the control unit can switch the transmission to a desired shift range by driving the electric motor and rotating the output shaft by a rotation angle corresponding to the shift operation signal. The shift range is held by a detent mechanism or the like provided in the transmission even when the electric motor is stopped.

[0007]

By the way, in the above-mentioned prior art, the electric gear motor is driven according to the switch operation of the driver, and the output shaft of the gear shift control device is rotated to switch the gear shift range. There is.

However, for example, when the electric motor or the like fails, the output shaft is not rotated even if the driver operates the changeover switch, so that the transmission is in the gear range fixed at the time of failure. Becomes

Therefore, for example, when the electric motor or the like breaks down while the vehicle is running and the transmission is fixed to the D range, the R range, or the like, it becomes difficult to stop the vehicle in a stable manner, or a tow truck. For example, the vehicle may not be able to be smoothly towed, and the reliability may be reduced.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to change the shift range by a manual operation or the like even if the electric motor or the like fails, so that the vehicle stops. Another object of the present invention is to provide a vehicular shift control device capable of easily taking measures against failure such as towing and improving reliability.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 generates a drive torque for switching the shift range of a casing provided in a vehicle and a transmission provided in the casing. An electric motor, an output shaft that is rotatably provided in the casing and outputs the rotation of the electric motor to the transmission side to switch the shift range, and the shift range is switched according to a shift operation signal input from the outside. Therefore, the invention is applied to a vehicle shift control device including a motor control means for controlling the electric motor.

A feature of the structure adopted by the invention of claim 1 is a backup shift range switching means for switching the shift range by rotating the output shaft by a mechanical operating force in addition to the electric motor. There is a configuration that is equipped with.

With this configuration, when the electric motor, the motor control means, etc. become inoperable due to a failure, the shift range switching means rotates the output shaft by a mechanical operation force of the driver or the like. It can be operated dynamically, and the transmission range can be switched in the backup state.

According to a second aspect of the present invention, the speed change range switching means has a backup speed change lever that is switched when the electric motor fails, and the speed change lever switches the transmission between the parking range and the neutral range. It is configured to selectively switch to one of the shift ranges.

As a result, the driver of the vehicle operates the gear shift range switching means by operating the gear shift range for backup when the electric motor or the like is out of order, and operates the gear shift range to the parking range (P range) or the gear shift range as required. It is possible to switch to the neutral range (N range).

Further, according to the invention of claim 3, the shift range switching means is a first lever which rotates integrally with the output shaft, and the output shaft, which is rotatably provided on the output shaft and is rotationally operated from the outside. The second lever is sometimes engaged with the first lever, and the second lever is held at a position separated from the first lever while the first lever is rotated by an electric motor, and the second lever is externally connected. And a biasing unit that allows the first lever to be engaged with the first lever when being rotated.

Thus, when the electric motor is out of order, the second lever can be rotated by the operating force of the driver, for example, and the output shaft can be driven by the second lever via the first lever. Further, when the electric motor is operating normally, the second lever, which is required only during the backup operation, can be held at a position separated from the first lever by the biasing means, so that they come into contact with each other and become redundant on the output shaft. It is possible to prevent an excessive load from being applied.

Further, according to the invention of claim 4, the second lever has left and right engaging portions which are separated from each other with the first lever interposed therebetween in the rotation direction of the output shaft. One of the engaging portions engages with the first lever when the second lever is rotated toward the parking range side, and the other engaging portion moves the second lever into the neutral range. It is configured to engage with the first lever when it is rotated toward the side.

Accordingly, either the left or right engaging portion can be engaged with the first lever according to the rotating direction of the second lever, and the engaging portion causes the first lever to move to the P range or It can be rotated toward either one of the N ranges.

Further, according to the invention of claim 5, in order to hold the second lever on the output shaft in the neutral position separated from the first lever, the output shaft is directed toward one side in the rotational direction of the output shaft from the neutral position. Is provided with a movable stopper capable of rotating toward the other side in the rotating direction, and the urging means includes:
A first biasing spring that constantly biases the movable stopper toward the one side to allow the movable stopper to rotate toward the other side, and the second lever in cooperation with the movable stopper. A second biasing spring that biases the second lever toward the movable stopper to hold it in the neutral position and allows the second lever to move away from the movable stopper toward the one side. is doing.

As a result, the movable stopper cannot be rotated to the one side in the rotation direction with respect to the neutral position of the second lever. Therefore, when the shift range switching means is inactive, the first biasing spring moves the movable stopper to the neutral position. Can be held at. Further, in this state, the second lever can be brought into contact with the movable stopper by the second biasing spring, so that the second lever can be held at the neutral position. On the other hand, when the shift range switching means is activated, the second lever can rotate in one direction of rotation so as to separate from the movable stopper against the second biasing spring, and the second lever functions as the movable stopper. It is also possible to rotate together with the first biasing spring to the other side in the rotation direction.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings, taking a vehicle shift control device mounted on an automobile or the like as an example.

Reference numeral 1 denotes a casing which forms an outer shell of the shift control device. The casing 1 is made of, for example, a metal material, a resin material or the like, and as shown in FIGS. 1 to 4, an upper case 1A.
And the lower case 1B.

Here, as shown in FIGS. 4 and 6, the upper case 1A is provided with a cylindrical projection 2 in which a shift range switching device 21 described later is arranged, and a peripheral wall of the cylindrical projection 2 is provided. Has
A notch-shaped spring mounting groove 2A is formed at one location in the circumferential direction. Further, as shown in FIG. 1, a movable stopper contact portion 3 for setting a neutral position of a second lever 24, which will be described later, is projectingly provided on the case 1A. Further, the case 1A is provided with a P range stopper 4 and an N range stopper 5 located on the protruding end side of the movable stopper abutting portion 3 in a protruding manner.

Reference numeral 6 denotes an electric motor mounted on the outer surface side of the casing 1. The electric motor 6 has a motor output shaft 6A protruding into the casing 1 as shown in FIG. The electric motor 6 is supplied with power by a control unit 18 described later via a connector 7 provided in the casing 1, and generates a drive torque for switching the shift range of an automatic transmission (not shown). .

Reference numeral 8 denotes a reduction gear mechanism housed in the casing 1. The reduction gear mechanism 8 includes a drive gear 9, intermediate gears 10 and 12, a driven gear 14 and the like, which will be described later, as shown in FIGS. The electric motor 6 is configured to include decelerating rotation of the electric motor 6 to transmit a large rotational torque to the output shaft 15 described later.

Reference numeral 9 denotes a substantially conical drive gear fixed to the tip end side of the motor output shaft 6A of the electric motor 6, and the drive gear 9
Meshes with the gear portion 10A of the intermediate gear 10, and these are formed as bevel gears whose rotation axes are orthogonal to each other. In this case, the bevel gear can bidirectionally transmit the rotation between the gears 9 and 10, and therefore, when the output shaft 15 is rotated in the backup state by the shift range switching device 21 described later. The rotation of the intermediate gear 10 transmitted from the output shaft 15 can be released to the drive gear 9 side.

Reference numeral 10 denotes a first intermediate gear which is rotatably provided on the casing 1 via a support shaft 11.
Is a conical gear portion 1 that is integrally formed of, for example, a metal material, a resin material, or the like, and is rotationally driven by the drive gear 9.
0A and a gear portion 10B formed by a spur gear or the like. A second intermediate gear 12 is rotatably provided on the casing 1 via a support shaft 13,
The intermediate gear 12 is integrally formed with a large-diameter gear portion 12A meshing with a gear portion 10B of the intermediate gear 10 and a small-diameter gear portion 12B formed of a spur gear or the like.

Reference numeral 14 is a substantially arcuate driven gear that constitutes the final stage gear of the reduction gear mechanism 8. The driven gear 14 is fixed to the output shaft 15 at a midway position in the longitudinal direction so as to prevent rotation. It rotates together with 15. Further, an arcuate gear portion 14A meshing with the small-diameter gear portion 12B of the intermediate gear 12 is formed on the outer peripheral side of the driven gear 14.

Reference numeral 15 denotes an output shaft formed of, for example, a stepped columnar metal rod or the like. The output shaft 15 is, as shown in FIG.
It is rotatably provided inside. The output shaft 15 is
A small-diameter shaft portion 15A having one side (upper side) in the axial direction protruding from the cylindrical projection 2 of the casing 1, and a lever fitting portion 1 formed with a non-circular cross section on the protruding end side of the small-diameter shaft portion 15A.
5B and a large-diameter shaft portion 15C that is formed by expanding the diameter of the small-diameter shaft portion 15A on the other side (lower side) in the axial direction and that is connected to a range switching valve (not shown) via a shaft or the like. It is configured.

The output shaft 15 is rotated in the arrow A direction or the arrow B direction in FIG. 2 through the reduction gear mechanism 8 when the electric motor 6 rotates in one direction or the opposite direction. The rotational displacement is output to the range switching valve on the transmission side. As a result, the transmission selectively selects one of the shift ranges including, for example, the P range, the R range, the N range, the D range, the S range, and the L range according to the rotation angle of the output shaft 15. Can be switched. In addition, the electric motor 6,
The electric motor 6 due to a failure of the control unit 18 or the like
When it becomes inoperable, the shift range switching device 21
Is used to mechanically rotate the output shaft 15.

Reference numeral 18 denotes a control unit as motor control means provided in the vehicle. The control unit 18, as shown in FIG. 1, receives signals input from a shift range change switch 19 and a rotation angle sensor 20 which will be described later. The electric motor 6 is drive-controlled by using the electric motor 6, and the automatic transmission is electrically switched to a desired shift range corresponding to the switch operation of the driver.

Reference numeral 19 denotes a shift range changeover switch provided near the driver's seat, for example. The shift range changeover switch 19 outputs to the control unit 18 a shift operation signal corresponding to the shift range selected and operated by the driver. To do.

Reference numeral 20 denotes a rotation angle sensor provided in the casing 1. The rotation angle sensor 20 is composed of a potentiometer mounted between the casing 1 and the output shaft 15 as shown in FIG. The rotation angle of the shaft 15 is detected and a detection signal is output to the control unit 18.

Reference numeral 21 denotes a gear shift range switching device as backup gear shift range switching means used when the electric motor 6 is inoperable. The gear shift range switching device 21 includes a first lever 22, a second lever 24, which will be described later. Movable stopper 2
5, the urging springs 26 and 27, the speed change lever 28 and the like, and is operated by a mechanical operation force of a driver or the like.

Numeral 22 is a first lever which is attached to the lever fitting portion 15B of the output shaft 15 by means of a retaining ring 23 in a non-rotatable state. The first lever 22 projects radially from the output shaft 15, When the shaft 15 is driven by the electric motor 6 between the P range and the L range, the rotation range θ in FIG.
It rotates integrally with the output shaft 15.

Reference numeral 24 denotes the output shaft 1 protruding from the casing 1.
5 is a second lever rotatably provided on the outer periphery of the protruding end of the second lever 24. As shown in FIGS.
Push / pull wire 29 by a shift lever 28 described later.
It is mechanically rotated via the.

The second lever 24 has a small-diameter shaft portion 15
A tubular fitting portion 24A rotatably fitted over the outer circumference of A and the outer circumference of a tubular portion 25A of a movable stopper 25 described later.
A substantially annular plate-shaped portion 24B that projects radially outward from the tubular fitting portion 24A, and a lever piece portion 24C that projects radially outward from one circumferential position of the plate-shaped portion 24B. , P that is located radially outside of the plate-like portion 24B and projects in the axial direction
Range engaging part 24D, N range engaging part 24E, and spring mounting parts 24F projectingly provided on both surfaces of the lever piece part 24C,
The wire mounting portion 24G is included.

Here, as shown in FIG. 5, the P range engaging portion 24D and the N range engaging portion 24E sandwich the first lever 22 with respect to the rotating direction of the output shaft 15, and the left and right sides. Are separated from each other, and these are arranged so as to be engageable with the left side and the right side of the first lever 22. Then, when the second lever 24 is held at the neutral position in FIG. 5 as described later, these engaging portions 24D and 24E are disposed at positions outside the rotation range θ of the first lever 22. The first levers 22 are separated from each other.

When the second lever 24 is rotated in the direction of arrow A as shown in FIG.
4D engages the first lever 22 and rotates the output shaft 15 toward the P range. When the second lever 24 contacts the P range stopper 4 of the casing 1, the transmission is switched to the P range.

On the other hand, when the second lever 24 is rotated in the direction of arrow B as shown in FIG. 11, the N range engaging portion 24E engages with the first lever 22 and the output shaft 15 is moved to the N direction. Rotate toward range. Then, the second lever 24
When is contacted with the N range stopper 5, the transmission is switched to the N range.

Reference numeral 25 denotes a movable stopper rotatably provided on the outer peripheral side of the output shaft 15. The movable stopper 25 is shown in FIG.
As shown in FIG. 5, a tubular portion 25A that is rotatably fitted to the outer periphery of the small diameter shaft portion 15A, an annular flange portion 25B that projects radially outward from the tubular portion 25A, and a circumferential direction of the flange portion 25B. Of 1
An L-shaped bent protrusion 25C that protrudes radially outward from the location and has its protruding end side bent to one side in the axial direction; and the bent protrusion 25.
It is configured to include a projecting piece portion 25D that projects radially outward from the flange portion 25B at a position different from C, and a spring mounting portion 25E that projects from the back surface of the projecting piece portion 25D.

Here, the movable stopper 25 is restricted from rotating in the direction of the arrow A (one side in the rotating direction) of the protruding piece portion 25D with respect to the movable stopper contact portion 3 of the casing 1.
The movable stopper contact portion 3 is rotatable in the direction of arrow B (the other side in the rotating direction). Then, when the shift range switching device 21 is not in operation, the projecting piece 25D of the movable stopper 25 is biased in the direction of arrow A by the spring force of the biasing spring 26, as shown in FIGS. 25D is in contact with the movable stopper contact portion 3. In this state, the lever piece 24C of the second lever 24 is in contact with the bending protrusion 25C of the movable stopper 25 by the spring force of the biasing spring 27. This causes the movable stopper 25 to move the biasing spring 26,
The second lever 24 is held in the neutral position shown in FIG. 5 in cooperation with 27, and in this neutral position, the engaging portions 24D and 24E are in the first position.
It is set in advance as a position that is out of the rotation range θ of the lever 22.

Reference numeral 26 is a first biasing spring as a biasing means provided between the casing 1 and the movable stopper 25.
As shown in FIGS. 6 and 7, the urging spring 26 is arranged in the cylindrical projection 2 of the casing 1, and one end 26A thereof is engaged in the spring mounting groove 2A of the cylindrical projection 2. At the same time, the other end 26B is attached to the spring mounting portion 25E of the movable stopper 25.
Have been hooked on. The urging spring 26 constantly urges the movable stopper 25 in the direction of arrow A in FIG. 5 to press the protruding piece 25D thereof against the movable stopper contact portion 3, and
The movable stopper 25 is allowed to rotate in the arrow B direction together with the second lever 24.

27 is a second lever 24 and a movable stopper 25.
A second urging spring as a urging means provided between the urging spring 27 and the urging spring 27. One end 27A of the urging spring 27 is hooked on the spring mounting portion 24F of the second lever 24, and The end 27B is hooked on the bent protrusion 25C of the movable stopper 25. Then, the biasing spring 27 causes the lever piece portion 24C of the second lever 24 to bend the protruding portion 25C of the movable stopper 25.
The second lever 24 is allowed to rotate in the arrow A direction away from the movable stopper 25 while being urged in the arrow B direction toward each other and pressing them against each other.

Reference numeral 28 is a backup speed change lever provided near the driver's seat of the vehicle, for example.
As shown in FIGS. 1 and 5, is mechanically connected to the second lever 24 via a push-pull wire 29 or the like attached to the wire attachment portion 24G of the second lever 24.

When the driver switches the gear shift lever 28 from the inoperative position shown in FIG. 1 to the P range direction, the second lever 2 is pushed through the push-pull wire 29.
4 is rotated in the direction of arrow A, and the transmission is switched to the P range. Further, when the shift lever 28 is switched to the N range direction, the second lever 24 is rotated in the arrow B direction, and the transmission is switched to the N range.

The vehicular shift control device according to the present embodiment has the above-mentioned structure, and its operation will be described below.

First, when the driver or the like changes the gear change range changeover switch 19 during driving of the vehicle, the control unit 18 drives the electric motor 6 to drive the electric motor 6.
The rotation is transmitted to the output shaft 15 via the reduction gear mechanism 8. Then, the control unit 18 uses the output shaft 1
The transmission can be switched to a desired shift range while the rotation angle sensor 20 detects the rotation angle of the gear 5. Also,
The shift range switched at this time is held by the detent mechanism or the like provided in the transmission even when the electric motor 6 is stopped.

When the electric motor 6 is operating normally in this way, as shown in FIGS. 5 and 8, the gear shift lever 28 for backup is set to the non-actuated position, and the gear shift range switching device 21 is switched to the first position. The 2 lever 24 is held at the neutral position by the movable stopper 25 and the biasing springs 26 and 27. Therefore, the engaging portion 24 of the second lever 24
D and 24E do not come into contact with the first lever 22 and hinder the rotation of the output shaft 15, and the output shaft 15 can be smoothly driven by the electric motor 6.

On the other hand, for example, when the electric motor 6 becomes inoperable due to a failure of the electric motor 6, the control unit 18, etc., the driver manually switches the speed change lever 28 while power supply is stopped. , Operates the shift range switching device 21.

In this case, for example, in order to stop the vehicle when the electric motor 6 fails, when the transmission is switched to the P range, when the driver first tilts the speed change lever 28 in the P range direction, the second lever 24 is moved. As shown in FIGS. 9 and 10, a mechanical operating force is applied in the direction of arrow A via the push-pull wire 29. As a result, the second lever 24 is rotated to the position where it abuts against the stopper 4 against the spring force of the biasing spring 27 without interlocking with the movable stopper 25, and the P range engaging portion 24D is The output shaft 15 can be driven to the P range side via the first lever 22. Thus, for example, after the vehicle is moved to a safe place such as a road shoulder, the transmission can be manually switched to the P range by the shift range switching device 21, and the vehicle can be reliably stopped.

Further, for example, when the transmission is switched to the N range in order to move the vehicle in the towed state, first, when the shift lever 28 is tilted in the N range direction, the second lever 24 is set to the position shown in FIG. As shown in FIG. 12, an operating force in the direction of arrow B is applied.

At this time, since the lever piece 24C of the second lever 24 is in contact with the bending protrusion 25C of the movable stopper 25, the second lever 24 is in a position of contacting the stopper 5 against the spring force of the biasing spring 26. Together with the movable stopper 25 as shown by arrow B
The N-range engaging portion 24E can be driven in the direction to drive the output shaft 15 to the N-range side via the first lever 22. Thus, for example, when the vehicle is towed by a tow truck or the like, the transmission can be manually switched to the N range, and the resistance of the grounded vehicle can be reduced to easily move the vehicle.

Thus, according to the present embodiment, in addition to the electric motor 6, the backup speed change range switching device 2 is provided.
1 is provided, even if the electric motor 6 or the like fails, for example, the backup transmission lever 28 can be manually operated to selectively switch the transmission to the P range or the N range. It is possible to easily take countermeasures against breakdowns such as stopping and pulling, and improve reliability.

In addition, the second lever 24 includes the first lever 2
Since the left and right engaging portions 24D and 24E are formed with the 2 being sandwiched therebetween, these engaging portions 24D and 24E are
The first lever 22 can be turned to the P range side or the N range side in accordance with the turning direction of, and the shift range switching device 21 capable of switching between two shift ranges can be realized with a simple structure.

The second lever 24 has a movable stopper 2
5 and the two biasing springs 26 and 27 are used to hold the intermediate position, so that the first lever 2 rotated by the electric motor 6 when the shift range switching device 21 is not operating.
It is possible to prevent the second lever 24 from interfering with 2,
Even when the shift range switching device 21 is mounted, the shift control in the normal state by the control unit 18 can be smoothly performed.

Moreover, when the gear shift range switching device 21 is not in operation, the neutral position of the second lever 24 is moved to the movable stopper 25.
Can be accurately set by the positional relationship between the protruding piece portion 25D and the movable stopper contact portion 3, and the second lever 24 can be stably held at the neutral position regardless of the spring force of the biasing springs 26 and 27. You can

In the above embodiment, the transmission can be switched to the P range or the N range by the shift range switching device 21, but the present invention is not limited to this, and the transmission can be switched by the shift range switching means. The configuration may be such that switching to only the P range is possible. In addition, the shift range switching means,
For example, the transmission may be configured to be switchable to the R range, D range, S range, L range, or the like.

In the embodiment, the drive gear 9 of the reduction gear mechanism 8 and the gear portion 10A of the intermediate gear 10 are conical bevel gears. However, the present invention is not limited to this, and these are bidirectional. You may comprise by the spur gear which can transmit rotation of.

[0061]

As described in detail above, according to the first aspect of the present invention, a backup shift range switching means for switching the shift range of the transmission by rotating the output shaft by a mechanical operating force is provided. Since the gear shift range switching means has a structure, the output shaft can be rotated by a mechanical operation force of a driver or the like even when the electric motor, the motor control means, or the like is broken down. Can be reliably switched in the backup state. Therefore, when the motor or the like fails, it is possible to easily take measures against the failure, such as stopping or pulling the vehicle, and the reliability can be improved.

According to the second aspect of the present invention, the shift range switching means has a shift lever for selectively switching the transmission to one of the P range and the N range. When the electric motor or the like fails, for example, after moving the vehicle to a safe place such as a road shoulder, the transmission lever can be operated to switch the transmission to the P range, and the vehicle can be reliably stopped. Also,
For example, when the vehicle is towed by a tow truck or the like, the transmission can be switched to the N range, so that the resistance of the grounded vehicle can be reduced and the vehicle can be easily moved.

According to the third aspect of the present invention, the shift range switching means rotates the output shaft by the second lever via the first lever, and the urging means moves the second shaft when the electric motor is operated.
Since the lever is configured to be held at a position separated from the first lever, when operating the shift range switching means,
By rotating the second lever, the output shaft can be driven via the first lever, and the shift range of the transmission can be reliably switched. Further, when the shift range switching means is not in operation, the biasing means can hold the second lever at a position where it does not interfere with the first lever, so that the motor control means can smoothly perform the shift control during normal operation.

Further, according to the invention of claim 4, the second lever has the left and right engaging portions which are separated from each other by sandwiching the first lever in the rotation direction of the output shaft. Two
Either the left or the right engaging portion can be engaged with the first lever according to the turning direction of the lever, and the first lever can be turned toward the P range or the N range by this engaging portion. . Therefore, it is possible to realize a shift range switching means capable of switching between two shift ranges with a simple structure.

According to the invention of claim 5, the second lever is held at the neutral position by the movable stopper and the first and second biasing springs. During operation of the electric motor, the engaging portion of the second lever does not come into contact with the first lever to prevent the rotation of the output shaft, and the output shaft can be smoothly driven by the electric motor. Further, the neutral position of the second lever can be accurately set as the rotation restricting position of the movable stopper.
The second lever can be stably held at the neutral position regardless of the spring force of the urging spring.

[Brief description of drawings]

FIG. 1 is a front view showing a vehicle shift control device according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of the shift control device in which a casing is partially broken.

3 is a sectional view of the lower side of the shift control device as seen from the direction of arrows III-III in FIG.

FIG. 4 is a cross-sectional view of the shift control device as seen from the direction of arrows IV-IV in FIG.

FIG. 5 is an enlarged view of a main part in FIG. 1 showing a shift range switching device.

6 is an enlarged cross-sectional view of the shift range switching device as seen from the direction of arrows VI-VI in FIG.

FIG. 7 is an exploded perspective view showing a state before the gear range switching device is assembled.

FIG. 8 is an explanatory diagram of FIG. 5 showing a state in which the second range lever is held at the neutral position when the gear shift range switching device is in a non-operating state.

FIG. 9 is an enlarged view of an essential part of the shift control device and the like showing a state in which the output lever is switched to the P range by rotating the second lever.

FIG. 10 is a diagram showing a state in which the output shaft is switched to the P range.
It is an explanatory view similar to.

FIG. 11 is an enlarged view of a main part of the shift control device and the like showing a state in which the output shaft is switched to the N range by rotating the second lever.

FIG. 12 is a diagram showing a state in which the output shaft is switched to the N range.
It is an explanatory view similar to.

[Explanation of symbols]

1 casing 2 cylindrical protrusion 2A spring mounting groove 3 Movable stopper contact part 4,5 stopper 6 electric motor 8 Reduction gear mechanism 9 Drive gear 10,12 Intermediate gear 14 Driven gear 15 Output shaft 18 control unit (motor control means) 20 Rotation angle sensor 21 Shift range switching device (shift range switching means) 22 First lever 24 Second lever 24A tubular fitting 24B Plate part 24C lever piece 24D, 24E engagement part 24F Spring mounting part 24G wire mounting part 25 Movable stopper 25A tube 25B collar part 25C bent protrusion 25D protrusion 25E spring mounting part 26, 27 biasing spring (biasing means) 26A, 26B, 27A, 27B end 28 gear shift lever 29 Push-pull wire

Claims (5)

[Claims] 1. A casing provided in a vehicle, an electric motor provided in the casing for generating a driving torque for switching a shift range of a transmission, and a casing rotatably provided in the casing for rotating the electric motor. A vehicle shift control device comprising: an output shaft that outputs to a transmission side to switch a shift range; and motor control means that controls the electric motor to switch the shift range according to a shift operation signal input from the outside. A shift control device for a vehicle, further comprising a backup shift range switching means for rotating the output shaft by a mechanical operating force and switching the shift range, separately from the electric motor. 2. The shift range switching means has a backup shift lever that is switched when the electric motor fails, and the shift lever shifts the transmission to one of a parking range and a neutral range. The shift control device for a vehicle according to claim 1, wherein the shift control device is configured to selectively switch to a range. 3. The shift range switching means includes a first lever which rotates integrally with the output shaft, and a first lever which is rotatably provided on the output shaft and is rotated by an external operation. When the second lever to be engaged and the first lever are rotated by an electric motor, the second lever is held at a position separated from the first lever, and the second lever is rotated from the outside. 3. The shift control device for a vehicle according to claim 1, further comprising an urging means that allows the first lever to be engaged with the first lever. 4. The second lever has left and right engaging portions that are separated from each other with the first lever interposed therebetween in the rotation direction of the output shaft, and one of the left and right engaging portions is provided. Engaging portion engages with the first lever when the second lever is rotated toward the parking range side, and the other engaging portion rotates the second lever toward the neutral range side. The shift control device for a vehicle according to claim 3, wherein the shift control device engages with the first lever when operated. 5. The rotation of the output shaft toward the one side of the rotation direction of the output shaft is restricted from the neutral position in order to hold the second lever at the neutral position separated from the first lever. A movable stopper capable of rotating toward the other side in the moving direction is provided, and the urging means always urges the movable stopper toward the one side so that the movable stopper faces the other side. A first biasing spring that allows rotation, and a second lever that biases the second lever toward the movable stopper in order to hold the second lever in a neutral position in cooperation with the movable stopper. The vehicle shift control device according to claim 3 or 4, further comprising: a second biasing spring that allows the component to move away from the movable stopper toward the one side.