JPH0694112A - Speed shift operation device for automatic transmission - Google Patents

Abstract

PURPOSE:To lock surely a select lever in a P range position by means of simple constitution. CONSTITUTION:A lock member 11 to regulate the engagement release of an engage-stopping pin 4 from a cam plate 5 at the time of a select lever 1 being a P range position is provided, and drive is carried out between a locking position and an unlocking position by means of a motor provided in a drive mechanism 13. A lock release member 31 that is operated mutually to make the lock member 11 in the unlcoking position forcedly is provided. A long hole 41a is formed at a bracket 41 fixed at a screw rod 15, and a pin 42 projectingly provided at the lock member 11 is slidably put in. When the lock release member 31 is operated, forced displacement to the unlocking position is conducted as the pin 42 is moved in the long hole 41a, but the displacement is not transmitted to the screw rod 15 side. When operation force is released return to the former locking position is carried out by means of a spring 43.

Description

Detailed Description of the Invention

[0001]

[Industrial applications]

The present invention relates to a shift operating device for an automatic transmission.

In the automatic transmission, the range position is selected by the select lever. As the range position, a range position for parking (P range position), an R range position for backward traveling, an N range position for neutral state, and a plurality of range positions for forward traveling are set. The forward travel range position may be called a little differently, but generally, the D range position, the 2 range position, 1
It is set to the range position.

If the select lever is inadvertently moved from the P range position for parking to the traveling range position, the vehicle starts to move against the driver's intention, which is not preferable. In order to prevent such a situation, recently, when the select lever is in the P range position, the lock device locks the select lever so that it cannot move to another range position unless a predetermined release condition is satisfied. Are often attached.

Basically, such a lock mechanism locks the select lever so that it does not move toward the other range position at the P range position, and the lock member and the unlock position. An electromagnetic actuator for driving to and from the position is provided, and when a predetermined lock release condition is satisfied, the foot brake is stepped on assuming that the ignition switch is turned on, for example. The actuator is operated so that the lock member is in the unlocked position on the condition that the lock is released.

With the lock mechanism as described above, even if a predetermined release condition is satisfied, the actuator does not operate for some reason and the lock member remains in the lock position. It is possible that
Therefore, it is also possible to separately provide a lock release member that is manually operated, and manually operate the lock release member so that the lock member can be forcibly set to the unlocked position (for example, actual opening). 62
-202433 publication).

[0007]

With the lock release member as described above, the predetermined lock release condition is not satisfied, and the lock release member is not operated. It has been found that the so-called lock-out problem that the select lever moves from the P range position is likely to occur.

Explaining this point in detail, the actuator is
When the select lever is in the P range position, the control unit drives and controls the lock member to be in the lock position, and when the predetermined unlock condition is satisfied, the lock member is in the unlock position. . For this reason, a switch for detecting whether the lock member is in the lock position or the unlock position is provided, and this switch detects the position of the member mechanically displaced according to the movement of the lock member. Has become.

On the other hand, the lock member is, as described above,
The unlocking member forces the unlocked position regardless of the actuating position of the actuator. When the detection switch detects the unlock position by this forcible movement to the unlock position, the actuator moves the lock member toward the lock position, and the actuator and the lock release member move. The movements will interfere.

In order to avoid such interference, even if the lock member is set to the unlock position by the unlock member, the detection switch detects that the lock position is currently in the lock position. A predetermined tolerance is given to the detection width. In other words, the amount of movement of the lock member from the lock position to the unlock position is set to be smaller than the amount of movement of the lock member from the lock position to the unlock position by the actuator, and this small movement In the range, the detection switch is set to detect the locked position.

However, even if the lock member is moved to the unlock position by the lock release member, it is assumed that the lock position is set by the actuator, but it is not the complete lock position. This may result in an incomplete lock position, which was the cause of the lock omission.

As a method of solving such a situation, it is conceivable that when the lock releasing member is operated, the control ignoring the detection signal from the detection switch is performed. In this case, the lock releasing member is operated. Of course, it is necessary to add a switch to detect that
The control logic of the actuator will be quite complicated.

Therefore, an object of the present invention is to provide a gear shift operating device for an automatic transmission, which is capable of surely preventing lock disengagement with an extremely simple structure.

[0014]

To achieve the above object, the present invention has the following configuration. That is, the select lever for manually operating the range position is selected.
And a lock member that locks the select lever so as to prevent a change to another range position different from the parking range position when the select lever is in the parking range position, and the lock member is driven. Gearshift operating device for an automatic transmission including an electromagnetic actuator for operating the lock member, and a lock release member for manually operating the lock member to forcibly bring the lock member to the unlock position. A predetermined play is set in the linkage mechanism between the lock member and the actuator,
The lock member is allowed to move from the lock position to the unlock position without displacing the lock member, and the predetermined play is utilized to urge the lock member to return to the lock position. And a spring that operates.

[0015]

When the lock member is brought to the unlocked position by the lock releasing member, the member closer to the actuator than the part where the predetermined play is set is not displaced. This is not only preferable for preventing an unreasonable external force from acting on the actuator, but also makes it possible to completely separate the movement of the lock member by the unlocking member from the control system of the actuator. Thus, the setting itself of the control system does not need to consider the existence of the unlocking member.

When the actuator drives the locking member between the locked position and the unlocked position, the action of the spring causes it to be substantially as if there were no predetermined play, ie, Since the movement of the actuator and the movement of the lock member have a correspondence relationship, in the state where the lock member is set to the lock position by the actuator, the lock member is surely set to the lock position unless the lock release member is operated. As a result, the lock is securely prevented from coming off. In other words, by setting the predetermined play, the lock position can be surely obtained without considering the amount of movement of the lock releasing member to the unlock position.
It becomes possible to drive the lock member.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show a first embodiment of the present invention. First, in FIG. 1, 1 is a select lever.
Therefore, it is swingable about a predetermined axis. In FIG. 1, the lower part of the select lever-1 is shown as viewed from the side of the vehicle body, but the upper part thereof is shown as viewed from the rear of the vehicle. In the embodiment, the range positions selected by the select lever-1 are, for example, in order from the front of the vehicle to the rear, a P range position, an R range position, an N range position, a D range position, and a two range position. There are 6 positions with 1 range position.

The select lever-1 is a push button 2
And a push rod 3 that is displaced downward when the button 2 is pressed, and a locking pin 4 protruding from the side surface of the push rod 3. In connection with this locking pin 4,
The cam plate 5 is fixed to the vehicle body. Now, when the push rod 3 is displaced downward by pressing the button 2, the engagement between the locking pin 4 and the cam plate 5 is released, and the select lever-1 is changed to an arbitrary range position. It can be operated. The locking pin 4 is always urged upward according to the push rod 3.

On the other hand, when the button 2 is not operated, the cam plate 5 may restrict the operation of changing the range position of the select lever-1 depending on the current range position. In the embodiment, the position corresponding to the range position of the select lever-1 with respect to the cam plate 5 is indicated by the initial letters P, R, N, D, 2, 1 indicating the range position. In this state, as is apparent, the case where it is necessary to press the button 2 to change the range position is as follows. That is, when changing from P range position to another range position, when changing from R range position to P range position, when changing from N range position to R range position, from N range position, D range position or 2 range position It is time to change to one range position.
FIG. 1 shows a state in which the locking pin 4 is displaced downward by pressing the button 2 and is disengaged from the cam plate 5 at the current P range position.

A lock member 11 is swingably held around a shaft 12 on the vehicle body. This lock member 1
1 acts on the locking pin 4 when the select lever-1 is in the P range position to forcibly regulate downward displacement of the locking pin 4, that is, disengagement from the cam plate 5. For this reason, FIG. 1 shows the lock member 11 in the unlock position, and FIG. 2 shows the lock member in the lock position.

The lock member 11 is driven between an unlock position and a lock position by a drive mechanism 13 attached to the vehicle body. This drive mechanism 13 and its related parts are shown in FIG. First, the drive mechanism 13 has an electric motor 14 as an electromagnetic actuator and a screw rod 15. A toothed nut 16 is screwed into the threaded rod 15, and a gear 17 which is rotationally driven by the motor 14 is meshed with the toothed nut 16. The toothed nut 16 is restricted from moving in the axial direction, and the screw rod 15 can be moved in the axial direction but is restricted from rotating, so that the screw rod 15 is rotated in accordance with the forward and reverse rotation of the gear 17. It is reciprocally driven in the horizontal direction in the figure.

The screw rod 15 and the lock member 11 are connected via a play setting mechanism 18. As shown in FIGS. 4 and 5, the play setting mechanism 18 includes a cylindrical guide 19 formed at the tip of the screw rod 15 and the guide 1.
9 has a rod member 20 slidably fitted therein. The rod member 20 extends toward the lock member 11, and the end portion of the rod member 20 is centered around the pin 22.
Is rotatably connected to. Then, the rod member 20
Is urged by the spring 21 in the direction in which the screw rod 15 and the lock member 11 come close to each other, and is normally in the state shown in FIG. Then, when an external force in the direction of separating the screw rod 15 and the lock member 11 is applied, as shown in FIG. 5, the spring 21 is compressed and the gap between the two members 15 and 11 is increased. In this way, the movable amount of the rod member 20 within the guide 19 becomes a predetermined play.

At the rear end of the screw rod 15, a switch piece 15
a is formed, the first contact 23 for unlock position detection is fixedly arranged in front of the switch piece 15a, that is, the left side in FIG. 3, and the second contact 24 for lock position detection is provided behind the switch piece 15a. Is fixedly placed. 25 in FIG.
Is a drive circuit, and 26 is a control circuit. The drive circuit 25 is
When receiving the lock signal from the control circuit 26, the motor 14 is driven until the switch piece 15a comes into contact with the second contact 24. Further, the drive circuit 25 includes a control circuit 26.
When the unlock signal is received from the motor 14, the motor 14 is driven until the switch piece 15a contacts the first contact 23.

The control circuit 26 includes three switches 27 ...
The signal from 29 is input. The switch 26 is a brake switch that is turned on when the foot brake is depressed. The switch 28 is a P range position detection switch that is turned on when the select lever-1 is in the P range position. The switch 29 is an ignition switch. Such a control circuit includes switches 27-2.
A signal indicating whether the motor 14, that is, the lock member 11 is in the lock position or the unlock position, is output to the drive circuit 25 in accordance with the operating state of No. 9, and the control contents are summarized in Table 1. It is shown.

[0025]

[Table 1]

As is apparent from Table 1, when the select lever-1 is in the P range position, the lock member 11 is unlocked only when the ignition switch 29 is ON and the foot brake is depressed. A signal for setting the lock position is output to the drive circuit 25.

Referring again to FIGS. 1 and 2, an unlocking member 31 is swingably held by the vehicle body about a shaft 32 in the vehicle body. One end of the unlocking member 31 is an operating portion 31a extending to a position where the driver can operate it. Further, the other end of the unlocking member 31 is positioned so as to be able to engage with the engaging protrusion 33 formed on the locking member 11. The lock release member 31 is always locked by the spring 34 by the spring 34.
Is held in a standby state where it has virtually no effect on. When the driver operates the operation portion 31a of the lock releasing member 31 rearward against the spring 34, the other end of the lock releasing member 31 causes the engagement protrusion 33 to engage with the engagement protrusion 33.
An external force for forcibly swinging the lock member 11 in the locked position toward the unlocked position can be applied by pressing the lock member 11 toward the center left.

In the above structure, the range position is not in the P range position while the vehicle is traveling, and the lock member 11 is in the unlock position at this time. Consider a case where the vehicle is stopped and the select lever-1 is operated to the P range position. In this state, when the ignition switch is not ON or the foot brake is not depressed, the actuator 14 is rotated toward the lock position and the screw rod 15 is displaced rightward in FIG. It This rightward displacement of the screw rod 15 brings the lock member 11 to the lock position shown in FIG. In this locked state, even if the push button 2 is pressed, the downward displacement of the locking pin 4 is restricted by the lock member 11, so the select lever-1 is changed from the P range position to another range position. Is restricted.

When the lock member 11 is in the locked position, the ignition switch is ON and the foot blur is
When the key is depressed, the motor 14 is rotated toward the unlocked position, and the lock member 11 is largely swung counterclockwise from the state of FIG. 2 to the unlocked position. If the push button 2 is pressed in this state, the locking pin 4 is displaced downward without being obstructed by the lock member 11 and the engagement with the cam plate 5 is released, so that the select lever-1 can be arbitrarily moved. Can be changed to range position.

When the operating portion 31a of the unlocking member 31 is pushed rightward in the drawing in the locked position of FIG. 2, the locking member 11 is set to the unlocked position as shown in FIG.
Also at this time, the select lever can be changed to an arbitrary range position while pressing the push button 2. When the unlock position is set by the unlock member 31, the play setting mechanism 18 is in the state shown in FIG.

FIGS. 6 and 7 show a second embodiment of the present invention, in which the same components as those in the above-mentioned embodiment are designated by the same reference numerals and their duplicate description will be omitted (this will be described below. The same applies to the three examples). In this embodiment, the long hole 41a is formed in the bracket 41 fixed to the tip of the screw rod 15,
The pin 4 protruding from the lock member 11 is provided in the elongated hole 41a.
2 is slidably fitted. And the bracket 41
A spring 43 is stretched between the lock member 11 and the lock member 11. This long hole 41a is for setting a predetermined play. FIG. 6 shows the lock member 11 by the motor 14.
6 shows a state when is set to the lock position, and FIG.
Operating the lock release member 31 from the state of
The state when 1 is forcibly set to the unlock position is shown.
Of course, in the case of this embodiment, the bracket 41 (the long hole 41
a), the pin 42, and the spring 43 constitute a play setting mechanism 44 corresponding to the play setting mechanism 18 of the first embodiment.

8 and 9 show a third embodiment of the present invention. In this embodiment, the first embodiment or the second embodiment
A member corresponding to the lock member 11 in the embodiment has a structure in which the lock member 51 and the holding member 52 are divided. The holding member 52 is similar to the above-described embodiment in that the shaft 12
Is swingably held by the vehicle body around the
1 is attached to a holding member 52 by a pin 53 so as to be swingable. The lock member 51 is biased by a spring 54 (corresponding to the springs 21 and 43) in the clockwise direction in FIG. Regulated. The holding member 52 is swingably driven by the motor 14. Of course, the movement of the lock member 51 in the direction away from the stopper 55 causes a predetermined play, and the predetermined play and the spring 54 and the stopper 55 set the play corresponding to the play setting mechanism 18 or 44 in the embodiment. The mechanism 56 is configured. FIG. 8 shows a state where the lock member 51 is set to the lock position by the motor 14. Further, FIG. 9 shows a state in which the lock releasing member 31 is operated to forcibly set the lock member 51 to the unlock position from the state of FIG.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, and is a view showing a state in which a lock member is forcibly set to an unlock position by a lock release member.

FIG. 2 is a view showing a state in which a lock member is at a lock position.

FIG. 3 is a diagram showing a drive mechanism portion of a lock member, a control system, and a connecting mechanism portion of the drive mechanism and the lock member.

FIG. 4 is a view showing a play setting mechanism in which a predetermined play is set, which is formed between a lock member and a drive mechanism.

5 is a view showing a state where the lock release member forcibly brings the lock member to an unlocked position from the state of FIG. 4;

FIG. 6 is a view showing a second embodiment of the present invention and showing a state when the lock member is at the lock position.

FIG. 7 is a diagram showing a state in which the lock member is forcibly set to the unlock position by the lock release member from the state of FIG. 6;

FIG. 8 is a view showing a third embodiment of the present invention and showing a state when the lock member is at the lock position.

9 is a diagram showing a state where the lock member is forcibly set to an unlock position by the lock release member from the state of FIG. 8;

[Explanation of symbols]

 1 Select lever 2 Push button 3 Push rod 4 Locking pin 5 Cam plate 11 Lock member 13 Drive mechanism 14 Motor (electromagnetic actuator) 15 Screw rod 15a Switch piece 18 Play setting mechanism 19 Guide (predetermined play) 20) Rod member 21 Spring 23 First contact point (for unlock position detection) 24 Second contact point (for lock position detection) 25 Drive circuit 26 Control circuit 27 Break switch 28 P range position detection switch 29 Ignition switch 31 Lock Release member 41 Bracket 41a Long hole (for setting predetermined play) 42 Pin 43 Spring 44 Play setting mechanism 51 Lock member 52 Holding member 53 Pin as swing shaft (for setting predetermined play) 54 Spring 55 Stopper (predetermined play) 56) Play setting Structure

Claims (4)

[Claims] 1. A select lever for manually selecting a range position and a change to another range position different from the parking range position when the select lever is in the parking range position. To lock the select lever, an electromagnetic actuator for driving the lock member, and a manually operated lock member to force the lock member to an unlocked position. In a gear shift operating device of an automatic transmission including a lock release member for operating the lock member, a predetermined play is set in a linking mechanism between the lock member and the actuator without displacing the actuator. The lock member is configured to move from a lock position to an unlock position, and the lock is brought to an unlock position by utilizing the predetermined play. Shift operating apparatus for an automatic transmission, characterized in that it comprises a spring for biasing to return the timber to the locked position, the. 2. The actuator according to claim 1, wherein when the select lever is in a parking range position, the lock member is in an unlocked position on condition that a foot brake is stepped on. -The one that is activated. 3. The condition according to claim 2, wherein a condition that an ignition switch is turned on is further added as a condition for operating the actuator so that the lock member is in an unlocked position. 4. A lock position or an unlock position according to claim 1, which is actuated in accordance with a mechanical displacement position of a member on the actuator side of a portion where the predetermined play is set. The one that has a detection switch to detect whether there is.