JP2003130217A - Range switching device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a range switching device capable of preventing a transmission delay in driving an electric motor due to the curing of lubricant in the range switching device. SOLUTION: In this range switching device 1 for a vehicle, a temperature decision means 61 decides whether or not it is a comparatively low temperature based on a temperature T detected by a temperature detection means 26. In a stopping state of the vehicle maintained by a vehicle stop maintaining means 26 by the decision result, the lubricant cured in the range switching device 1 is softened by driving the electric motor 12 by an electric motor driving means 63 before selecting a shift position by a shift range selection means 25, and the transmission delay in driving the electric motor 12 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range switching device mounted on a vehicle or the like, and more particularly, to a range switching device for switching a shift range by an electric signal, which is a so-called shift-by-wire system, in which the temperature is relatively low. In some cases, the present invention relates to a range switching device that prevents a delay in a shift range switching operation.

[0002]

2. Description of the Related Art Conventionally, a range switching device is of a system in which movement of the position of a shift lever is transmitted via a push-pull cable engaged with the shift lever, that is, a system of manually switching the shift range of a hydraulic control device. It is common.

In recent years, there has been a tendency to increase the degree of freedom in the place where the shift lever is installed due to demands for increasing the degree of freedom in the interior design of automobiles and demands for increasing the number of derivative vehicles from the same platform. So, for example, the actual Kaihei 7
As disclosed in Japanese Unexamined Patent Publication No. 16067 and the like, there has been proposed a range switching device using a so-called shift-by-wire system, which switches a range by an electric signal.

The range switching device disclosed in the above publication transmits the shift position selection from the shift lever by an electric signal, and transmits the drive of the electric motor through a gear or the like, for example, hydraulic control of an automatic transmission. The shift range of the device is changed. As a result, while achieving the same function as that of the conventional method, it is possible to increase the degree of freedom of the shift lever installation place as described above.

[0005]

By the way, in the conventional system, the shift range is directly switched through the push-pull cable by the movement of the position of the shift lever, so that the manual valve of the automatic transmission is selected from the selection of the shift position by the shift lever. The time until the vehicle moved (select time) was constant without being affected by temperature, and the driver did not feel any discomfort.

[0006] However, the range switching device by the shift-by-wire system described above has a mechanism (reduction gear mechanism) for reducing the power transmitted from the gear supported by the bearing to the electric motor driven by the electric signal from the shift lever. Although the drive is transmitted via the motor, the lubricant (eg grease, oil, etc.) applied to the inside of the electric motor, bearings, gears, etc. may harden. For this reason,
The transmission of the drive of the electric motor may be delayed than usual. Especially in a vehicle left at a low temperature for a relatively long period of time, the initial select time becomes longer due to the hardened lubricant, and after the driver selects the shift position with the shift lever, unnecessary waiting time is imposed. There were times when I felt pleasant.

Therefore, an object of the present invention is to provide a range switching device that drives an electric motor before a shift position is selected, thereby solving the above-mentioned problems.

[0008]

The present invention according to claim 1 (see, for example, FIGS. 1 to 8), a shift position selecting means (25) capable of selecting a shift position, and the shift position selecting means (25). Shift range control means (18) for outputting a predetermined signal based on the selection, an electric motor (12) driven based on the predetermined signal from the shift range control means (18), and a shift range from the drive. (For example, P range, R range, N range, D
A range switching device (1) for a vehicle, comprising: a shift range operating unit (70) capable of switching between a range, a Ds range, etc.), and a vehicle stop maintaining means (62) for maintaining the stopped state of the vehicle; An electric motor drive means (63) for driving the electric motor (12) before the shift position is selected by the shift position selection means (25), and a range switching device for a vehicle ( It is in 1).

The present invention according to claim 2 (see, for example, FIGS. 1 to 8) comprises a temperature detecting means (for example, a temperature sensor) for detecting a temperature (T) (26) and the temperature detecting means (26). A temperature determination unit (61) for determining that the detected temperature (T) is equal to or lower than a predetermined temperature (for example, Tlim or lower), and the vehicle stop maintaining unit (6)
2) The range switching device (1) for a vehicle according to claim 1, wherein the stopped state of the vehicle is maintained based on the determination result of the temperature detection result.

According to a third aspect of the present invention (see, for example, FIGS. 1 to 7), an electromagnetic clutch (30) for connecting / disconnecting a power transmission state between the electric motor (12) and the shift range operating section (70). ), The vehicle stop maintaining means (6
2. The electromagnetic clutch control means (62a) capable of controlling the disengagement of the electromagnetic clutch (30) is provided in (2).
Alternatively, the vehicle range switching device (1) is described in item 2.

The vehicle stop maintaining means (62) includes, of course, release control of the electromagnetic clutch (30), forcible actuation of the brake (27), braking of drive wheels by ABS, and the like. It is a concept of maintaining a stopped state.

The present invention according to claim 4 (for example, FIGS. 1 to 4 and 8), the vehicle stop maintaining means (62)
The range switching device (1) for a vehicle according to claim 1 or 2, further comprising a vehicle stop control means (62b) capable of controlling a stopped state of the vehicle.

According to a fifth aspect of the present invention (for example, FIGS. 1 to 4), the vehicle stop control means (62b) includes a brake (for example, a foot brake, AB) for stopping the vehicle.
S, an electric parking mechanism, etc.) (27) are operated.

According to a sixth aspect of the present invention (for example, FIGS. 1 to 4 and 8), the vehicle has a drive source, and a drive device for transmitting output rotation of the drive source to drive wheels ( 2, 3, 28), and the vehicle stop control means (62b) controls the drive device (eg 2, 3, 28) so as to suppress power transmission to the drive wheels of the vehicle.
Operation (for example, R control, that is, reverse inhibit control,
N control, that is, neutral control).
Alternatively, it is in the range switching device (1) of the vehicle described in 5.

The present invention according to claim 7 (for example, FIGS. 1 to 4 and 8), the vehicle stop control means (62b)
Is configured to suppress engagement of a friction engagement element (for example, an input clutch) of the drive device (for example, 2, 3, 28),
According to another aspect of the present invention, there is provided a vehicle range switching device (1).

The present invention according to claim 8 (for example, FIGS. 1 to 4 and 8), the vehicle stop control means (62b)
The range switching device (1) for a vehicle according to any one of claims 4 to 7, characterized in that the stop state of the vehicle is controlled while the electromagnetic clutch (30) is engaged.

According to a ninth aspect of the present invention (for example, FIGS. 1 to 4 and 6 to 8), the vehicle has a drive source, and the output rotation of the drive source is transmitted to drive wheels. Drive unit (for example, 2, 3, 28) for operating the shift range operation unit (70).
3. A detent mechanism (9) for holding a shift range (for example, P range, R range, N range, D range, Ds range, etc.) in each shift range (3, 28). The vehicle range switching device (1) described above.

According to a tenth aspect of the present invention (for example, FIGS. 1 to 4 and 6 to 8), the shift range operating section (70) is a reduction gear for transmitting the drive of the electric motor (12). Vehicle range switching device (1) according to any one of claims 4 to 9, comprising a mechanism (46).
It is in.

According to an eleventh aspect of the present invention (for example, FIGS. 1 to 8), a worm gear (12b) for transmitting the drive of the electric motor (12) to the electromagnetic clutch (30),
And a worm wheel (13).
The vehicle range switching device (1) according to any one of 1 to 10.

[0020]

According to the present invention of claim 1, the vehicle stop maintaining means maintains the stopped state of the vehicle, and the electric motor driving means drives the electric motor before selecting the shift position to change the shift range. Since the switching operation is performed, the range switching device can be driven by driving the electric motor that keeps the stopped state of the vehicle but has slowed driving (for example, due to hardening of the lubricant) before selecting the shift position. Can be smooth. As a result, it is possible to prevent the transmission delay of the drive of the electric motor in the range switching device,
By shortening the time (select time) from the selection of the shift position to the switching of the shift range, it is possible to prevent the driver from feeling uncomfortable due to unnecessary waiting time.

According to the second aspect of the present invention, the temperature detecting means detects the temperature and the temperature determining means determines that the temperature is equal to or lower than the predetermined temperature. Therefore, the lubricant hardened when the temperature is relatively low is used. The electric motor, which has become dull,
By driving before the shift position is selected, the hardened lubricant can be softened and the range switching device can be driven smoothly. As a result, the time from selection of shift position to switching of shift range (select time) even if the temperature is relatively low
Can be shortened to prevent the driver from feeling uncomfortable due to unnecessary waiting time.

According to the third aspect of the present invention, the electromagnetic clutch control means can disengage and control the electromagnetic clutch that connects and disconnects the power transmission state between the electric motor and the shift range operating portion as the vehicle stop maintaining means. While the electromagnetic clutch is released, the drive of the electric motor is not transmitted to the shift range operation unit, that is, the stop state of the vehicle can be reliably maintained without switching the shift range to the traveling range. It is possible to drive an electric motor that has become dull in driving, which makes it possible to drive the range switching device smoothly.

According to the fourth aspect of the present invention, the vehicle stop control means can control the stopped state of the vehicle as the vehicle stop maintaining means. Therefore, the vehicle stop control can be performed even if the shift range is the traveling range. By controlling the stop state of the vehicle by the means, it is possible to drive the range switching device such as the electric motor and the shift range operating section, which have become slow to drive, while maintaining the stop state of the vehicle securely. The range switching device can be driven smoothly.

According to the present invention of claim 5, the vehicle stop control means actuates a brake for stopping the vehicle.
Even if the shift range is the travel range, the vehicle stop control means actuates the brake to stop the vehicle, so that the electric motor and the shift are slowed down in the state where the stopped state of the vehicle is reliably maintained. It is possible to drive a range switching device such as a range operating unit, which allows
The range switching device can be driven smoothly.

According to the present invention of claim 6, the vehicle stop control means operates the drive device so as to suppress the power transmission to the drive wheels of the vehicle. Therefore, even if the shift range is the traveling range. The vehicle stop control means operates the drive device to suppress the power transmission to the drive wheels of the vehicle, so that the electric motor and the shift range operation section in which the drive becomes dull in the state where the vehicle stop state is reliably maintained. Can drive range switching devices such as
The range switching device can be driven smoothly.

According to the seventh aspect of the present invention, the vehicle stop control means suppresses the engagement of the frictional engagement element of the drive device, so that the power transmission is surely suppressed but the driving becomes slow. It is possible to drive the range switching device such as the electric motor and the shift range operation unit, and thus, the range switching device can be driven smoothly.

According to the eighth aspect of the present invention, the vehicle stop control means controls the stopped state of the vehicle with the electromagnetic clutch engaged, so that the stopped state of the vehicle can be reliably maintained. Although it is possible, the drive of the electric motor is transmitted to the shift range operation unit, and not only the electric motor but also the shift range operation unit whose drive becomes slow is driven to reduce the transmission delay of the drive of the electric motor in the entire range switching device. Can be prevented.

According to the ninth aspect of the present invention, the detent mechanism holds the shift range of the drive device in each shift range. Therefore, the detent mechanism that has become dull is driven to drive the electric motor in the shift range operating section. It is possible to prevent the delay in the transmission of the drive.

According to the tenth aspect of the present invention, the reduction gear mechanism transmits the drive of the electric motor in the shift range operating portion, so that the reduction gear mechanism that has become dull is driven to drive the shift range operating portion. It is possible to prevent the transmission delay of the drive of the electric motor.

According to the eleventh aspect of the present invention, since the worm gear and the worm wheel transmit the drive of the electric motor to the electromagnetic clutch, the worm gear and the worm wheel whose drive is slowed down are driven to generate the electric power. It is possible to prevent the transmission delay of the drive from the motor to the electromagnetic clutch.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a range switching device 1 according to the present invention.
2 is a cross-sectional view showing the valve drive device 10 of the range switching device 1.

A vehicle to which the present invention is applied has a drive source and is provided with a drive device (not shown) for transmitting output rotation of the drive source to drive wheels, and has a multi-stage automatic transmission or a continuously variable transmission. The automatic transmission 28 (not shown) such as (CVT) constitutes a part of the drive device.

As shown in FIG. 1, the range switching device 1 according to the present invention is connected to the automatic transmission 28 via a hydraulic control device 3 provided in the automatic transmission 28, and the hydraulic control device 3 is connected to the automatic transmission 28. The stored manual valve 2 is
The hydraulic control device 3 is provided so as to be movable in the directions of the arrows A and B in FIG. By moving the manual valve 2 in the directions of arrows A and B shown in FIG. 1 and positioning it at a predetermined position, the hydraulic control device 3 shifts the shift range of the hydraulic control device 3 from the arrow A side to the arrow B side. For example, the P range, the R range, the N range, the D range, and the Ds range are sequentially switched.

An engaging groove 2c composed of two discs 2b, 2b is formed at the tip of the manual valve 2 on the arrow A side, and a detent lever 5 is provided in the engaging groove 2c. Pin 5a planted in the arm 5b of the
Are engaged through. On the upper part of the detent lever 5, for example, five groove portions 5d, 5e, 5f, 5g and 5h are formed at predetermined intervals. Each groove 5d, 5e, 5
f, 5g, and 5h are arranged in order from the upper right of FIG. 1 in a form corresponding to the shift ranges of the hydraulic control device 3, for example, “P”, “R”, “N”, “D”, and “Ds”. Further, on the right side of the detent lever 5 in FIG. 1, an arm portion 5b in which the above-mentioned pin 5a is planted is formed to project.
On the left side of the detent lever 5 in FIG. 1, a parking rod engaging hole 5i for driving a parking mechanism in a P range (not shown) is formed so as to penetrate therethrough, and the detent lever 5 has a rectangular shape at a substantially central portion thereof. The engaging hole 5j is formed therethrough, and the range control shaft 7 is inserted therein.

On the upper part of, for example, the five groove portions 5d, 5e, 5f, 5g, 5h of the detent lever 5, a detent spring composed of a leaf spring whose one end is fixed to the hydraulic control device 3 or the automatic transmission 28 is formed. The roller 9a, which is rotatably supported at its tip, is fitted into and engaged with, for example, any one of the five groove portions 5d, 5e, 5f, 5g, 5h, and 9b by its own elasticity. It is provided in a biased form. Further, the engagement hole 5 of the detent lever 5
A range control shaft 7 formed in a rod shape is integrally engaged with the detent lever 5 at j. Range control axis 7
1 has a rectangular cross section at the left end of FIG.
a is formed, and the valve drive device 10 is connected to the engagement portion 7a. As described above, the detent mechanism 9 includes the detent lever 5, the roller 9a, and the detent spring 9b.

Next, the valve drive device 10 is shown in FIG.
And it demonstrates along FIG. The valve drive device 10 includes an electric motor 12, an electromagnetic clutch 30, and a reduction gear mechanism 4
6 and an output gear 17. As shown in FIG. 2, the valve drive device 10 is mounted on the cover 8 of the automatic transmission 28 by the bolts 29, 29 via the support plate 45. As shown in FIG. 1 and FIG. An electromagnetic clutch 30, a reduction gear mechanism 46, and an output gear 17 are housed in the formed casing 11. In addition, the valve drive device 10 includes the cover 8 of the automatic transmission 28.
On the other hand, the influence of heat generated by the automatic transmission 28, which is arranged through the gap GP and is transmitted from the cover 8, is eliminated.

The electric motor 12 includes a bracket 12c,
An armature (not shown), an output shaft 12a of the electric motor 12,
And a casing 11. Bracket 1
2c includes an armature (not shown) formed as a stator, and rotatably supports one end of the output shaft 12a of the electric motor 12 provided at the rotation center of the armature. A worm gear 12b is attached to the other end of the output shaft 12a of the electric motor 12, and is meshed with a worm wheel 13 attached to an input shaft 37 of an electromagnetic clutch 30 attached to the casing 11, whereby an output shaft 12a of the electric motor 12 is provided. Are rotatably supported together with the armature. The electric motor 12 is attached to the casing 11 via a bracket 12c.

The electromagnetic clutch 30 includes the input shaft 37 of the electromagnetic clutch 30, the armature main body 50, the spring 52, the attracted disk 31, and the attracting rotor 32.
, The exciting coil 33, and the output shaft 38 of the electromagnetic clutch 30.
It consists of and. Input shaft 3 of electromagnetic clutch 30
7 is formed in a cylindrical shape, and has a rod-shaped electromagnetic clutch 30.
The output shaft 38 is concentrically mounted and is rotatably supported on the output shaft 38 of the electromagnetic clutch 30 via bearings 42 and 43. On the left side of the input shaft 37 of the electromagnetic clutch 30 in FIG. 2, an adsorption rotor 32 is provided in a form of spline connection.

The attraction rotor 32 is formed in a substantially circular shape, and an exciting coil 33 is wound around the outer circumference of the attraction rotor 32. The attraction rotor 32 and the attraction disk 31 face each other, and when the electromagnetic clutch 30 is released, the attraction rotor 32 and the attraction disk 31 have a predetermined gap due to the urging of a spring 52 described later. When the electromagnetic clutch 30 is engaged, the attraction rotor 32 and the attraction disk 31 are pressed against each other against the bias of the spring 52, as shown in FIG. Become. The attracted disk 31 is attached to a spring 52. The spring 52 is attached to the outer peripheral tip of a substantially circular armature main body 50.
It is engaged via a supporting portion 51 that supports the second member 2. The armature body 50 is attached to the output shaft 38 of the electromagnetic clutch 30.

When the exciting coil 33 of the electromagnetic clutch 30 is excited, the attraction rotor 32 and the attraction disk 31 are engaged with each other as described above. As a result, the electric motor 1
The drive of No. 2 is transmitted from the input shaft 37 to the electromagnetic clutch 30, and is sequentially transmitted to the output shaft 38 of the electromagnetic clutch 30 via the adsorption rotor 32, the attracted disk 31, the spring 52, and the armature main body 50. On the contrary, by releasing the excitation of the exciting coil 33 of the electromagnetic clutch 30,
The attraction rotor 32 and the attraction disk 31 are released.
As a result, the electric motor 12 is driven by the electromagnetic clutch 30.
Is no longer transmitted to the output shaft 38 of.

The reduction gear mechanism 46 includes an output shaft 38 of the electromagnetic clutch 30, a small gear 35 formed on the output shaft 38 of the electromagnetic clutch 30, an intermediate shaft 36, a large gear 36a of the intermediate shaft 36, and an intermediate shaft. And 36 small gears 36b. The output shaft 38 of the electromagnetic clutch 30 is rotatably supported on the inner periphery of the input shaft 37 of the electromagnetic clutch 30 so as to be nested and concentric with the input shaft 37 of the electromagnetic clutch 30. . The input shaft 37 is supported by the casing 11 via a bearing 44. Also,
The output shaft 38 is composed of a connecting shaft 39 and a small gear 35 formed on the outer periphery of one end of the connecting shaft 39. The output shaft 38 includes a bearing 4 near both ends of the small gear 35.
1, 42 and a bearing 43 are arranged at the other end of the connecting shaft 39. The output shaft 38 is connected to the bearing 4
1 and bearings 42 and 43 via the bearing 44 and the input shaft 37, and is supported by the casing 11. In addition, a plurality of bearings 41 of the connecting shaft 39,
The bearing 42 is disposed at a position that axially overlaps the worm wheel 13 among the 42 and 43.

The small gear 35 formed on the output shaft 38 of the electromagnetic clutch 30 has a bearing 47 on the casing 11.
A large gear 36 a of the intermediate shaft 36, which is rotatably supported via 47, is meshed with the gear. The intermediate shaft 36 has a small gear 36b.
Is formed, and the output gear 17, which is formed in a fan shape as a whole, is meshed with the small gear 36b. The output gear 17 is rotatably supported by the casing 11 via bearings 48, 48. Further, as shown in FIG. 1, a rectangular engaging hole 17a is formed at the center of the output gear 17, The engaging portion 7a of the range control shaft 7 is fitted and engaged in the engaging hole 17a.

The electric motor 12 and the reduction gear mechanism 4
6, the gear train of the output shaft 38, such as the small gear 35, the intermediate shaft 36, the large gear 36a, the small gear 36b, and the output gear 17, is the output shaft 38 nested within the input shaft 37 of the electromagnetic clutch 30. Of the electromagnetic clutch 30 and the output shaft 38 of the electromagnetic clutch 30.
Since they are taken out in the same direction, they are arranged in a form aligned in the vertical direction in the figure, as shown in FIG.

The range switching device 1 according to the present invention
In the shift range operation unit 70, the detent mechanism 9
, The range control shaft 7, the output gear 17, and the reduction gear mechanism 46.

As shown on the upper left side in FIG. 2, the position sensor 21 is provided by fixing the casing 11 to one end of the range control shaft 7 protruding from the casing 11, and supporting the detent spring 9b. Roller 9
a is a predetermined groove 5d, 5e, 5 on the upper part of the detent lever
The range position of the hydraulic control device 3 is detected based on the rotation angle of the range control shaft 7 that is fitted into and engaged with f, 5g, and 5h. The position sensor 21 is not limited to the detection of the rotation angle of the range control shaft 7, but may be any device that can detect the current position of the detent lever 5.
It may be provided other than above.

Next, the shift range control means 18 will be described with reference to FIGS. 3 is a block diagram showing a control unit (ECU) according to the present invention, and FIG. 4 is a block diagram showing shift range control means. As shown in FIG. 3, the shift range control means 18 constitutes a part of the control unit (ECU) according to the present invention shown in FIG. 1. The configuration of the control unit (ECU) according to the present invention will be described later. As shown in FIGS. 2 and 4, the shift range control means 18 includes a position sensor 21 fixed to the casing 11 for detecting the position of the detent lever 5 via the range control shaft 7, and a shift lever as the shift position selection means 25. 25,
Connected to the electric motor 12 and the electromagnetic clutch 3
It is connected to 0.

Further, as shown in FIG. 4, the shift lever 25 is connected to a shift lever position detector 23 which constitutes the shift range control means 18, and the shift lever position detector 23 is connected to the shift operation controller 20. There is. Also,
The position sensor 21 is also connected to the shift operation control unit 20. The shift operation control unit 20 includes a clutch drive control unit 22.
And the motor drive control unit 19, and the motor drive control unit 19 connects the electric motor 12 to the clutch drive control unit 2.
2 is connected to the electromagnetic clutch 30.

Next, the operation of the range switching device 1 will be described with reference to FIGS. 1, 2 and 4. For example, when the driver moves the position of the shift lever 25 and selects the shift position as shown in FIG. 4 in order to switch the shift range, the shift lever position detection unit 23 notifies the shift operation control unit 20 of the shift position. Output signal.

Based on the signal output from the shift lever position detection unit 23, the shift operation control unit 20 shifts the shift position selected by the shift lever 25 until then to the shift position selected as a result of the position movement of the shift lever 25. In order to move the shift position to, the motor drive control unit 19 is instructed to rotate the electric motor 12 in the normal or reverse direction according to the moving direction.

For example, the moving direction changes the shift range from P → R.
In the case of the direction of switching from → N → D → Ds, for example, when switching from the R range to the D range via the N range, the electric motor 12 is rotated in the normal direction, and conversely the movement direction shifts the shift range to Ds → D → N. In the direction of switching from → R → P, for example, when switching from the D range to the N range and the P range via the R range, the electric motor 12 is reversed.

The motor drive control unit 19 receives the command from the shift operation control unit 20 to rotate the electric motor 12 in the normal direction or in the reverse direction as described above, and rotates the electric motor 12 based on the command. In addition, the shift operation control unit 20
Receives a signal indicating that the position of the shift lever 25 has been moved from the shift lever position detection unit 23 in order to transmit the drive of the electric motor 12 to the shift range operation unit 70, so that the clutch drive control unit 22 receives the electromagnetic clutch 30. The command for engagement of is output. The clutch drive control unit 22 receives the command from the shift operation control unit 20, and receives the electromagnetic clutch 3
The exciting coil 33 of 0 is excited to engage the attracted disk 31 and the attracting rotor 32.

As a result, as shown in FIGS. 1 and 2,
The electric motor 12 is driven by the worm gear 12b, the worm wheel 13, the input shaft 37 of the electromagnetic clutch 30, the adsorption rotor 32, the attracted disk 31, the spring 52, the armature main body 50, the output shaft 38 of the electromagnetic clutch 30,
Small gear 35, large gear 36a of intermediate shaft 36, small gear 36b
1 is transmitted to the output gear 17 through the range control shaft 7 shown in FIG.
It is rotated by a predetermined angle in the directions indicated by arrows C and D.

When the range control shaft 7 is rotated by a predetermined angle by the electric motor 12, the detent lever 5 moves to the arm portion 5b.
At the same time, the pin 5a is rotated by a predetermined angle in the directions of arrows C and D shown in FIG. By moving the pin 5a by a predetermined amount, the spool 2a of the manual valve 2 that is engaged with the pin 5a via the engaging groove 2c is also moved by the same amount as the amount of movement of the pin 5a in the directions A and B. The hydraulic control device 3 is moved in the A and B directions, and the shift range of the hydraulic control device 3 is sequentially from the arrow A side shown in FIG. 1 to the P-R-N-D-Ds range, or from the arrow B side shown in FIG. It is switched to the D-N-R-P range.

Detent lever 5 by range control shaft 7
Is rotated by a predetermined angle, the roller 9a supported by the detent spring 9b moves into the predetermined groove portions 5d, 5e, 5f, 5
Move to g and 5h. When the position sensor 21 detects that the roller 9a has moved to the predetermined groove portions 5d, 5e, 5f, 5g, and 5h, the position sensor 21 outputs the detection result to the shift operation control unit 20, and the shift operation control unit 20 receiving this detection result. A command to release the electromagnetic clutch 30 is output to the clutch drive control unit 22, and a command to stop the electric motor 12 is output to the motor drive control device 19.

As a result, the drive from the electric motor 12 is not transmitted to the output gear 17 side thereafter, and the shift range operating portion 70 is in a free rotation state, but the roller 9a of the detent spring 9b is moved to the detent lever 5. The groove portions 5d, 5e, 5f, 5g, 5h are fitted and engaged and fixed.

In the range switching device 1 described above, there is no transmission delay of the drive of the electric motor 12 from the electric motor 12 to the manual valve 2, and the shift range is smoothly changed. Therefore, one end of the output shaft 12a of the electric motor 12 is connected. Supporting bracket 12c, worm gear 12
b, the worm wheel 13, the small gear 35 of the output shaft 38 of the electromagnetic clutch 30, the large gear 36a of the intermediate shaft 36, the small gear 36b of the intermediate shaft 36, and the output gear 17 are coated with a lubricant (for example, grease or oil). Has been done. In addition, the bearing 4 that supports the input shaft 37 of the electromagnetic clutch 30, which is all the bearings that configure the valve drive device 10.
2, 43, a bearing 41 supporting the connecting shaft 39,
42, 43, bearings 47, 4 supporting the intermediate shaft
7, and bearings 48, 4 supporting the output shaft 17.
8 is also coated with a lubricant. Furthermore, the groove portions 5d, 5 above the detent lever 5 that constitute the detent mechanism 9 are formed.
e, 5f, 5g, 5h, and detent spring 9b
A lubricant is also applied to the roller 9a which is rotatably supported by the roller 9a.

Next, the main part of the present invention will be described with reference to FIGS. As shown in FIG. 3, the control unit (ECU) according to the present invention includes a temperature determination means 61, a vehicle stop maintaining means 62, and an electric motor driving means 63.
Further, the vehicle stop maintaining means 62 includes an electromagnetic clutch control means 62a or a vehicle stop control means 62b.
In addition, the shift range control means 1 described above is included in the control unit.
8 is provided for performing normal shift range switching.

As shown in FIG. 3, the temperature detecting means 26 for detecting the temperature (the temperature in the range switching device 1),
The temperature determination unit 61 is connected to the temperature determination unit 61, and the temperature determination unit 61 is connected to the vehicle stop maintaining unit 62. In the vehicle stop maintaining means 62, the electromagnetic clutch control means 62a is the electromagnetic clutch 30, and the vehicle stop control means 62b is the brake 27.
And the automatic transmission 28. Further, the vehicle stop maintaining means 62 is connected to the electric motor driving means 63, and the electric motor driving means 63 is connected to the electric motor 12.

In the embodiment according to the present invention, for example, the electric motor 12, the worm gear 12b, and the worm wheel 1 are used.
3, the lubricant applied to the reduction gear mechanism 46, the output gear 17, the detent mechanism 9 and the like hardens (for example, the surface layer of the lubricant hardens), so that the drive of the electric motor 12 is delayed than usual and the manual valve Transmission to 2 (transmission delay)
Therefore, the time (hereinafter referred to as “select time”) from the selection of the shift position by the shift lever 25 to the movement of the manual valve 2 may be long. For example, in a vehicle left at a low temperature for a relatively long time,
In particular, the initial select time may be lengthened by the hardened lubricant. In such a case, the range switching device 1 according to the present invention softens the lubricant hardened by the drive of the electric motor 12 (for example, crushes the surface layer of the hardened lubricant by the drive), and the electric motor 1
The second transmission delay is prevented, thereby preventing the driver from feeling uncomfortable due to unnecessary waiting time. Hereinafter, the range switching device 1 according to the present invention will be described with reference to the first to fourth embodiments.

(Embodiment 1) The operation of the range switching device 1 according to the present invention will be described with reference to FIGS. 3 and 5.
FIG. 5 is a flowchart showing the operation of the range switching device 1 according to the first embodiment.

The range switching device 1 according to the first embodiment is
The temperature detection means 26, the temperature determination means 61, the electromagnetic clutch control means 62a as the vehicle stop maintaining means 62, and the electric motor driving means 63 are provided.

First, as shown in FIG. 5, when an unillustrated ignition switch (hereinafter referred to as "IG switch") is operated (Yes in step S-1), as shown in FIG. 26 detects the temperature T and outputs the detection result to the temperature determination means 61. On the other hand, if the IG switch is not operated, the flowchart ends (No in step S-1).

Then, when the temperature determining means 61 receives the signal of the temperature T from the temperature detecting means 26, it determines whether or not the temperature T falls below the temperature threshold Tlim (S-2). Below a relatively low temperature T at which the hardening of the lubricant is expected, eg 0
When the temperature T is 0 ° C., the temperature threshold value Tlim is set when the temperature T is 0 ° C. or less, and when the temperature T output from the temperature detection unit 26 is the temperature threshold Tlim or less, the temperature determination unit 61 hardens the lubricant. It is determined that the condition is met (Yes in step S-2), and the process proceeds to the next step S-3. On the other hand, when the temperature T is equal to or higher than the temperature threshold Tlim,
The temperature determination means 61 determines that the condition for curing the lubricant is not satisfied (No in step S-2), and if the lubricant is not cured, that is, since the select time is not affected, the flowchart ends ( S-5). If the temperature detecting means 26 detects the temperature in the range switching device 1, the temperature sensor of the automatic transmission 28,
Alternatively, it may be any one such as a vehicle temperature sensor.

In step S-2, if the temperature determining means 61 determines that the condition for hardening the lubricant is met, the temperature determining means 61 causes the electromagnetic waves forming the vehicle stop maintaining means 62 to operate as shown in FIG. Clutch control means 62a
A command for maintaining the stopped state of the vehicle is output to. Upon receiving this, the electromagnetic clutch control means 62a releases the electromagnetic clutch 30 in order to maintain the stopped state of the vehicle (S).
-3). As a result, even if the electric motor 12 is driven,
The electric motor 12 is driven by the output shaft 38 of the electromagnetic clutch 30.
From being transmitted to the manual valve 2 via the reduction gear mechanism 46 and the shift range operation unit 70, and the shift range is switched to the traveling range (for example, one of the Ds range, the D range, the R range, etc.). Instead, the vehicle remains stationary.

Then, the vehicle stop maintaining means 62 outputs a signal to the electric motor driving means 63 to drive the electric motor 12, and the electric motor driving means 6 receives the signal.
3 drives the electric motor 12 (S-4), softens the hardened lubricant because the temperature T is equal to or lower than the temperature threshold Tlim, and the flowchart ends (S-5). When the driver selects the shift position by the shift position selecting means (shift lever) 25 during the control shown in the above flow chart, the normal range switching control is performed by the shift range control means 18 after the control is completed. To change the shift range.

As described above, the range switching device 1 according to the first embodiment of the present invention detects the condition where the lubricant is hardened when the temperature T is equal to or lower than the temperature threshold value Tlim, so that when the temperature is relatively low. By driving the electric motor 12 that has become dull due to the hardened lubricant before the shift position is selected, the hardened lubricant can be softened and the range switching device 1 can be driven smoothly. it can. Thus, the transmission delay of the drive of the electric motor 12 in the range switching device 1 can be prevented, so that it is possible to shorten the select time and prevent the driver from feeling uncomfortable due to unnecessary waiting time.

Further, since the vehicle stop maintaining means 62 releases the electromagnetic clutch 30, the drive of the electric motor 12 is not transmitted to the shift range operating section 70, that is, the shift range is the traveling range (eg, Ds range, D range, The electric motor 12 can be driven in a state in which the stopped state of the vehicle is reliably maintained without switching to the R range or the like), and the hardened lubricant is softened by the driving of the electric motor 12, and the electric motor 12 Can be driven smoothly.

Further, the electric motor 12 and the electromagnetic clutch 30
It is possible to soften the hardened lubricant in the worm gear 12b and the worm wheel 13 provided between the electric motor 12 and the electric motor 12 to prevent the transmission delay of the drive from the electric motor 12 to the electromagnetic clutch 30.

(Second Embodiment) The operation of the range switching device 1 according to the present invention will be described with reference to FIGS. 3 and 6.
FIG. 6 is a flowchart showing the operation of the range switching device 1 according to the second embodiment.

The range switching device 1 according to the second embodiment is
The temperature detection means 26, the temperature determination means 61, the electromagnetic clutch control means 62a as the vehicle stop maintaining means 62, and the electric motor driving means 63 are provided.

First, as shown in FIG. 6, when an IG switch (not shown) is operated (Yes in step S-11),
As shown in FIG. 3, the temperature detecting means 26 detects the temperature T and outputs the detection result to the temperature determining means 61. on the other hand,
If the IG switch is not actuated, the flowchart ends (No in step S-11).

Then, when the temperature determining means 61 receives the signal of the temperature T from the temperature detecting means 26, it determines whether or not the temperature T falls below the temperature threshold Tlim (S-12). When the lubricant is cured at a relatively low temperature T or lower, for example, 0 ° C. or lower, when the temperature T is 0 ° C., the temperature threshold value Tlim is set, and the temperature T output from the temperature detection unit 26 is set to the temperature. When the temperature is equal to or less than the threshold value Tlim, the temperature determination unit 61 determines that the condition for hardening the lubricant is satisfied (Yes in step S-12), and the next step S-1.
Go to 3. On the other hand, when the temperature T output from the temperature detection means 26 is equal to or higher than the temperature threshold value Tlim, the temperature determination means 6
No. 1 determines that the condition for curing the lubricant is not satisfied (No in step S-12), and if the lubricant is not cured, that is, since the select time is not affected, the flowchart ends (S-17). ). The temperature detecting means 2
6 may be a temperature sensor of the automatic transmission 28, a temperature sensor of the vehicle, or the like as long as it detects the temperature T in the range switching device 1.

In step S-12, when it is determined by the temperature determining means 61 that the lubricant is hardened, the temperature determining means 61 causes the vehicle stop maintaining means 62 to notify the vehicle as shown in FIG. A command for detecting a stopped state (for example, an operating state of a parking brake or a foot brake) is output, and in response to this, the vehicle stop maintaining unit 62 detects the stopped state of the vehicle (S-13). For example, when the brake (parking brake) 27 is not operated, the vehicle stop maintaining means 62 is the electromagnetic clutch control means 62.
A command for releasing the electromagnetic clutch 30 is output to a (No in step S-13). Conversely, for example, if the brake (parking brake) 27 is operated, the vehicle stop maintaining means 62 outputs a command to the electromagnetic clutch control means 62a to engage the electromagnetic clutch 30 (Yes in step S-13).

Upon receipt of the command to release the electromagnetic clutch 30, the electromagnetic clutch control means 62a releases the electromagnetic clutch 30 (S-14). As a result, even if the electric motor 12 is driven, the drive of the electric motor 12 is not transmitted to the manual valve 2 via the shift range operation unit 70, so that the shift range is the travel range (for example, the Ds range,
It does not switch to either the D range or the R range), and the stopped state of the vehicle is maintained even if the brake (parking brake) 27 is not operated.

When the electromagnetic clutch control means 62a receives a command to engage the electromagnetic clutch 30, it engages the electromagnetic clutch 30 (S-15). As a result, the electric motor 12 is driven via the shift range operating unit 70, that is, the electromagnetic clutch 30 while the stopped state of the vehicle is maintained.
Is transmitted through the output shaft 38, the reduction gear mechanism 46, the output gear 17, the range control shaft 7, and the detent mechanism 9 of
The manual valve 2 is moved so that the shift range can be switched to the traveling range (for example, any of the Ds range, the D range, the R range, etc.).

Then, the vehicle stop maintaining means 62 outputs a signal to the electric motor driving means 63 in order to drive the electric motor 12, and the electric motor driving means 6 receives the signal.
3 drives the electric motor 12 (S-16), softens the hardened lubricant because the temperature T is equal to or lower than the temperature threshold Tlim, and the flow chart ends (S-17). When the driver selects the shift position by the shift position selecting means (shift lever) 25 during the control shown in the above flow chart, the normal range switching control is performed by the shift range control means 18 after the control is completed. To change the shift range.

As described above, in the range switching device 1 according to the second embodiment of the present invention, when the brake (parking brake) 27 is operated, the vehicle stop maintaining means 62 causes the electromagnetic clutch control means 62a to cause the electromagnetic clutch 30 to operate. The electromagnetic clutch control means 62a engages the electromagnetic clutch 30. Therefore, when the brake (parking brake) 27 is operated, the electric motor 12 is engaged.
Not only the drive of the electric motor 12, but the drive of the electric motor 12 is transmitted to the shift range operation unit 70.
It is possible to prevent the transmission delay of the drive of the electric motor 12 by softening the entire lubricant, that is, the lubricant hardened in the reduction gear mechanism 46 and the detent mechanism 9.

The brake (parking brake) 2
7, the non-operation, that is, the engagement of the electromagnetic clutch 30,
Regardless of the release, the lubricant hardened in the worm gear 12b and the worm wheel 13 provided between the electric motor 12 and the electromagnetic clutch 30 is softened,
It is possible to prevent transmission delay of the drive from the electric motor 12 to the electromagnetic clutch 30.

In the second embodiment, the brake 27 is a parking brake, but the brake 27 is not limited to this, and may be a foot brake, an electric parking mechanism, an ABS, or the like.

(Embodiment 3) The operation of the range switching device 1 according to the present invention will be described with reference to FIGS. 3 and 7.
FIG. 7 is a flowchart showing the operation of the range switching device 1 according to the third embodiment.

The range switching device 1 according to the third embodiment is
The temperature detection means 26, the temperature determination means 61, the electromagnetic clutch control means 62a as the vehicle stop maintaining means 62, and the electric motor driving means 63 are provided.

First, as shown in FIG. 7, when an unillustrated engine is started (Yes in step S-21),
As shown in, the temperature detecting means 26 detects the temperature T and outputs the detection result to the temperature determining means 61. On the other hand, if the engine is not started, the flowchart ends (No in step S-21).

Next, when the temperature determination means 61 receives the signal of the temperature T from the temperature detection means 26, it determines whether or not the temperature T falls below the temperature threshold Tlim (S-22). When the lubricant is cured at a relatively low temperature T or lower, for example, 0 ° C. or lower, when the temperature T is 0 ° C., the temperature threshold value Tlim is set, and the temperature T output from the temperature detection unit 26 is set to the temperature. When the temperature is equal to or lower than the threshold value Tlim, the temperature determination unit 61 determines that the condition for hardening the lubricant is satisfied (Yes in step S-22), and the next step S-2.
Go to 3. On the other hand, when the temperature T output from the temperature detection means 26 is equal to or higher than the temperature threshold value Tlim, the temperature determination means 6
No. 1 determines that the condition for curing the lubricant is not satisfied (No in step S-22), and if the lubricant is not cured, that is, since the select time is not affected, the flowchart ends (S-27). ). The temperature detecting means 2
6 may be a temperature sensor of the automatic transmission 28, a temperature sensor of the vehicle, or the like as long as it detects the temperature T in the range switching device 1.

In step S-22, when it is determined by the temperature determining means 61 that the lubricant hardens, the temperature determining means 61 causes the vehicle stop maintaining means 62 to stop the vehicle as shown in FIG. A command for detecting the state (for example, the operating state of the parking brake, the foot brake, etc.) is output, and in response to this, the vehicle stop maintaining means 62 detects the stopped state of the vehicle (S-23). If the brake (parking brake) 27 is not operated, the vehicle stop maintaining means 62 outputs a command for releasing the electromagnetic clutch 30 to the electromagnetic clutch control means 62a (step S-2).
No. 3). Conversely, the brake (parking brake) 2
If No. 7 is operated, the vehicle stop maintaining means 62 outputs a command to engage the electromagnetic clutch 30 to the electromagnetic clutch control means 62a (Yes in step S-23).

When the electromagnetic clutch control means 62a receives a command to disengage the electromagnetic clutch 30, it disengages the electromagnetic clutch 30 (S-24). As a result, even if the electric motor 12 is driven, the drive of the electric motor 12 is not transmitted to the manual valve 2 via the shift range operation unit 70, so that the shift range is the travel range (for example, the Ds range,
It does not switch to either the D range or the R range), and the stopped state of the vehicle is maintained even if the brake (parking brake) 27 is not operated.

When the electromagnetic clutch control means 62a receives a command to engage the electromagnetic clutch 30, it engages the electromagnetic clutch 30 (S-25). As a result, the electric motor 12 is driven via the shift range operating unit 70, that is, the electromagnetic clutch 30 while the stopped state of the vehicle is maintained.
Is transmitted through the output shaft 38, the reduction gear mechanism 46, the output gear 17, the range control shaft 7, and the detent mechanism 9 of
The manual valve 2 is moved so that the shift range can be switched to the traveling range (for example, any of the Ds range, the D range, the R range, etc.).

Next, the vehicle stop maintaining means 62 outputs a signal to the electric motor driving means 63 to drive the electric motor 12, and the electric motor driving means 6 receives the signal.
3 drives the electric motor 12 (S-26), softens the hardened lubricant because the temperature T is equal to or lower than the temperature threshold Tlim, and the flowchart ends (S-27). When the driver selects the shift position by the shift position selecting means (shift lever) 25 during the control shown in the above flow chart, the normal range switching control is performed by the shift range control means 18 after the control is completed. To change the shift range.

As described above, the range switching device 1 according to the third embodiment of the present invention starts the operation of the range switching device 1 according to the present invention when the engine is started, but the present invention is not limited to this. Any operation may be performed as long as it is performed before the driver selects the shift position, such as the operation of the IG switch.

The brake (parking brake) 2
7 is operated, the vehicle stop maintaining means 62 outputs a command to the electromagnetic clutch control means 62a to engage the electromagnetic clutch 30, and the electromagnetic clutch control means 62a engages the electromagnetic clutch 30, so that the brake (parking) is performed. When the brake 27 is operated, not only the drive of the electric motor 12 but also the drive of the electric motor 12 is transmitted to the shift range operation unit 70, and the transmission delay of the drive of the electric motor 12 in the entire range switching device 1 is transmitted. Can be prevented.

The brake (parking brake) 2
7, the non-operation, that is, the engagement of the electromagnetic clutch 30,
Regardless of the release, the lubricant hardened in the worm gear 12b and the worm wheel 13 provided between the electric motor 12 and the electromagnetic clutch 30 is softened,
It is possible to prevent transmission delay of the drive from the electric motor 12 to the electromagnetic clutch 30.

In the third embodiment, the brake 27 is a parking brake, but the brake 27 is not limited to this, and may be a foot brake, an electric parking mechanism, an ABS, or the like.

(Embodiment 4) The operation of the range switching device 1 according to the present invention will be described with reference to FIGS. 3 and 8.
FIG. 8 is a flowchart showing the operation of the range switching device 1 according to the fourth embodiment.

The range switching device 1 according to the fourth embodiment is
The temperature detection means 26, the temperature determination means 61, the vehicle stop maintaining means 62 (vehicle stop control means 62b), and the electric motor drive means 63 are provided.

First, as shown in FIG. 8, when an IG switch (not shown) is operated (Yes in step S-31),
As shown in FIG. 3, the temperature detecting means 26 detects the temperature T and outputs the detection result to the temperature determining means 61. on the other hand,
If the IG switch is not actuated, the flowchart ends (No in step S-31).

Then, when the temperature determining means 61 receives the signal of the temperature T from the temperature detecting means 26, it determines whether or not the temperature T falls below the temperature threshold Tlim (S-32). When the lubricant is cured at a relatively low temperature T or lower, for example, 0 ° C. or lower, when the temperature T is 0 ° C., the temperature threshold value Tlim is set, and the temperature T output from the temperature detection unit 26 is set to the temperature. When the temperature is equal to or lower than the threshold value Tlim, the temperature determination unit 61 determines that the condition for hardening the lubricant is satisfied (Yes in step S-32), and the next step S-3.
Go to 3. On the other hand, when the temperature T is equal to or higher than the temperature threshold Tlim, the temperature determination unit 61 determines that the condition for curing the lubricant is not satisfied (No in step S-32), and if the lubricant is not cured, that is, Since the select time is not affected, the flow chart ends (S-37). The temperature detecting means 26 may be any one of the temperature sensor of the automatic transmission 28 and the temperature sensor of the vehicle as long as it indicates the temperature in the range switching device 1.

In step S-32, when the temperature determining means 61 determines that the condition for hardening the lubricant is satisfied, the temperature determining means 61 causes the vehicle stop maintaining means 62 to stop the vehicle as shown in FIG. A command for detecting the state (for example, the operating state of the parking brake, the foot brake, etc.) is output, and in response to this, the vehicle stop maintaining means 62 detects the stopped state of the vehicle (S-33). If the brake (parking brake) 27 is not operated, as shown in FIG. 3, the vehicle stop control means 62b disconnects (suppresses) the power transmission to the drive wheels of the vehicle.
Is operated, that is, in order to prohibit (suppress) engagement of a friction engagement element (for example, an input clutch) of the automatic transmission 28, the hydraulic control device 3 is controlled (for example, R control, that is, reverse inhibit control, N control). That is, a command such as neutral control is output (No in step S-33), and the hydraulic control device 3 is controlled (S-34) while the electromagnetic clutch 30 is engaged (S-35). The vehicle stop control is performed.

On the contrary, the brake (parking brake) 2
If No. 7 is operated, the electromagnetic clutch 30 is engaged (Yes in step S-33). Even if the brake (parking brake) 27 is operated, in order to further ensure the maintenance of the stopped state of the vehicle, the vehicle stop control means 62b does not transmit power to the drive wheels of the vehicle. 3 may be controlled (for example, R control or reverse inhibit control, N control or neutral control, etc.).

Then, the vehicle stop maintaining means 62 outputs a signal to the electric motor driving means 63 to drive the electric motor 12, and the electric motor driving means 6 receives the signal.
3 drives the electric motor 12 (S-36). As a result, the electric motor 12 is driven via the shift range operating unit 70 while the vehicle is always stopped, that is,
The transmission is transmitted via the output shaft 38 of the electromagnetic clutch 30, the reduction gear mechanism 46, the output gear 17, the range control shaft 7, and the detent mechanism 9, the manual valve 2 is moved, and the shift range is set to the travel range (for example, the Ds range). , D range, R range, etc.). Then, when the electric motor 12 is driven, the lubricant is softened and the flowchart ends (S-37). When the driver selects the shift position by the shift position selecting means (shift lever) 25 during the control shown in the above flow chart, the normal range switching control is performed by the shift range control means 18 after the control is completed. To change the shift range.

As described above, in the range switching device 1 according to the fourth embodiment of the present invention, the vehicle stop control means 62b maintains the stopped state of the vehicle while the electromagnetic clutch 30 is engaged. Drive is always transmitted to the shift range operation unit 70, and not only the electric motor 12
The entire range switching device 1, that is, the electromagnetic clutch 30
The transmission delay of the drive of the electric motor 12 via the output shaft 38, the reduction gear mechanism 46, the output gear 17, the range control shaft 7, and the detent mechanism 9 can be prevented.

The brake (parking brake) 2
7, the non-operation, that is, the engagement of the electromagnetic clutch 30,
Regardless of the release, the lubricant hardened in the worm gear 12b and the worm wheel 13 provided between the electric motor 12 and the electromagnetic clutch 30 is softened,
It is possible to prevent transmission delay of the drive from the electric motor 12 to the electromagnetic clutch 30.

In the fourth embodiment, the brake 27 is a parking brake, but the brake 27 is not limited to this, and may be a foot brake, an electric parking mechanism, an ABS or the like. Further, the vehicle stop control means 62b controls the hydraulic control device 3 so as to disconnect (suppress) the power transmission to the drive wheels of the vehicle by the automatic transmission 28 (for example, R control, that is, reverse inhibit control, N control, that is, N control). However, the present invention is not limited to this, and may be any one that maintains the stopped state of the vehicle, such as the operation of the electric parking mechanism and the braking of the drive wheels by the ABS.

In the fourth embodiment, the present invention has been described as an example applied to a vehicle equipped with the automatic transmission 28. However, the present invention is not limited to this, and the range switching device 1 including the shift range operating section 70 and the electric motor 12 is described. The present invention can be applied to any vehicle equipped with, for example, in an electric vehicle or a hybrid vehicle, by similarly operating a drive source (motor) to suppress power transmission to drive wheels by regenerative braking. can do.

In the above-described embodiment of the present invention, an example in which the present invention is applied when the lubricant is hardened at a relatively low temperature is shown. However, the present invention is not limited to this, and the lubricant can be applied regardless of the temperature. The present invention may be applied when the lubricant has hardened (for example, when the lubricant is hardened by being left for a relatively long period of time), and when the drive of the electric motor 12 or the like becomes dull regardless of the lubricant. May be. In such cases,
For example, when the IG switch is operated or the engine is started, the electric motor 12 may be driven before the shift position is selected without detecting the temperature by the temperature detecting means 26.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a range switching device according to the present invention.

FIG. 2 is a cross-sectional view showing a valve drive device of the range switching device.

FIG. 3 is a block diagram showing a control unit (ECU) according to the present invention.

FIG. 4 is a block diagram showing shift range control means.

FIG. 5 is a flowchart showing the operation of the range switching device according to the first embodiment.

FIG. 6 is a flowchart showing the operation of the range switching device according to the second embodiment.

FIG. 7 is a flowchart showing the operation of the range switching device according to the third embodiment.

FIG. 8 is a flowchart showing the operation of the range switching device according to the fourth embodiment.

[Explanation of symbols]

1 Range switching device 2 Drive device (manual valve) 3 Drive device (hydraulic control device) 9 Detent mechanism 12 electric motor 12b worm gear 13 Worm wheel 18 Shift range control means 25 Shift position selection means (shift lever) 26 Temperature detection means (temperature sensor) 27 brakes 28 Drive (automatic transmission) 30 electromagnetic clutch 46 Reduction gear mechanism 61 temperature determination means 62 Vehicle stop maintenance means 62a Electromagnetic clutch control means 62b Vehicle stop control means 63 Electric motor drive means 70 Shift range operation unit T temperature

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI theme code (reference) F16H 59:72 F16H 59:72 (72) Inventor Naoki Ogoshi 10 Akane, Fujine-cho, Anjo City, Aichi Prefecture A-W Co., Ltd. F term (reference) 3J009 DA15 DA20 EA06 EA11 EA25 ED01 ED06 FA03 3J067 AA01 AA21 AA24 AB23 AC01 AC22 AC32 BB03 CA22 CA33 DA43 DB18 DB32 DB33 DB35 EA81 FB61 FB71 GA01 3J552 MA10 PA07 A01 QA20 MA01 PA06 NA01 RA29 RB02 SA01 SA31 SB01 SB02 VA48W VA62W VA80Z VB16W

Claims (11)

[Claims] 1. A shift position selection means for selecting a shift position, a shift range control means for outputting a predetermined signal based on the selection of the shift position selection means, and a predetermined signal from the shift range control means. A range switching device for a vehicle, comprising: an electric motor driven by the motor; and a shift range operating section capable of switching a shift range by the drive, comprising: vehicle stop maintaining means for maintaining a stopped state of the vehicle; An electric motor drive means for driving the electric motor before the shift position is selected by the selection means. 2. A temperature detecting means for detecting a temperature, and a temperature determining means for determining whether the temperature detected by the temperature detecting means is a predetermined temperature or less, wherein the vehicle stop maintaining means comprises: The range switching device for a vehicle according to claim 1, wherein the stopped state of the vehicle is maintained based on a determination result of the temperature determination means. 3. An electromagnetic clutch for connecting / disconnecting a power transmission state between the electric motor and the shift range operating section, wherein the vehicle stop maintaining means has an electromagnetic clutch control means capable of controlling release of the electromagnetic clutch. The range switching device for a vehicle according to claim 1 or 2. 4. The range switching device for a vehicle according to claim 1, wherein the vehicle stop maintaining means includes a vehicle stop control means capable of controlling a stopped state of the vehicle. 5. The range switching device for a vehicle according to claim 4, wherein the vehicle stop control means actuates a brake that stops the vehicle. 6. The vehicle includes a drive device having a drive source and transmitting the output rotation of the drive source to drive wheels, wherein the vehicle stop control means transmits power to the drive wheels of the vehicle. The range switching device for a vehicle according to claim 4, wherein the drive device is operated so as to suppress 7. The range switching device for a vehicle according to claim 6, wherein the vehicle stop control means suppresses engagement of a frictional engagement element of the drive device. 8. The range switching device for a vehicle according to claim 4, wherein the vehicle stop control means controls the stopped state of the vehicle with the electromagnetic clutch engaged. 9. The vehicle includes a drive device that has a drive source and transmits the output rotation of the drive source to drive wheels, and the shift range operation unit sets the shift range of the drive device to each shift range. The range switching device for a vehicle according to claim 4, further comprising a detent mechanism for holding the range. 10. The range switching device for a vehicle according to claim 4, wherein the shift range operation unit includes a reduction gear mechanism that transmits the drive of the electric motor. 11. The range switching device for a vehicle according to claim 1, further comprising a worm gear and a worm wheel for transmitting the drive of the electric motor to the electromagnetic clutch.