JPH0657499B2 - Automatic transmission shift lock device - Google Patents

Description

The present invention relates to a shift lock device for a vehicle equipped with an automatic transmission, specifically, a selector lever placed in a parking position without care. The present invention relates to a shift lock device that cannot be moved to another range position.

(Prior Art) A general vehicle equipped with an automatic transmission (hereinafter referred to as "A / T vehicle")
The selector lever (referred to as ") has a parking position" P "for mechanically fixing the fluid clutch during parking, a reverse position" R "for setting the back gear, and a neutral position" N "for completely disengaging the transmission. ], Drive position "D", which allows normal full automatic shifting,
Change gear from second gear only or low gear to second gear
It is selectively placed in a second position "2", which limits between gears, and a low position "L", which limits shifting to only low gears. Then, in order to prevent the A / T vehicle from running out of control immediately after starting, the engine is
It is designed to be started via an engine starting circuit which allows starting only in the position or neutral position.

In addition, when the gear enters the driving range while the engine is running at high speed, the selector lever is moved from the parking position to another range, for example, the drive range, in order to prevent the vehicle from running out of control. In this case, a parking shift lock device is conceivable in which the selector lever (shift rod) cannot move unless the brake pedal is depressed. In such a parking shift lock device, the lock member of the selector lever (shift rod) and the brake pedal are connected by a connecting means such as a cable, and
When the pedal is depressed, the locking member retracts to the unlocked position.

(Problems to be Solved by the Invention) In order to release the locking action of the parking shift lock device, the brake pedal must be depressed. In the case of the parking shift lock device in which the brake pedal and the lock member are mechanically connected, the brake pedal, which is operated and swings relatively frequently during traveling, also swings the lock member. There is a problem that it becomes a load of. In addition, retracting the lock member to the unlocked position when the brake pedal is depressed means, in other words, that the lock member is in the locked position when the brake pedal is not depressed, which means that the shift It will be locked and some means of avoiding this will be required.

(Means for Solving the Problem) In the present invention, the load of the pedal force of the brake pedal is not applied, and the unlocked position of the lock member is surely guaranteed.
In providing the shift lock device for T cars,
A shift rod provided so as to be movable and rotatable in the axial direction according to a gear position selection operation of the lever, a lock pin fixed to the shift rod, and the shift pin engaged with the lock pin. Move freely between a locked position that restricts axial movement of the rod and a non-locked position that is retracted from the movement path of the lock pin and that does not hinder the axial and rotational movement of the shift rod. A lock plate provided, a return spring that gives the lock plate a habit of moving toward the lock position, a control pin fixed to the shift rod, and a parking rod for the shift rod.
A first position, which is moved by the control pin when it is placed in a position, and a position which is moved by the control pin when the shift rod is in a position other than the parking position. Control lever that is swingable between the second position and the brake pedal,
Connecting means for connecting the plate and connecting means for moving the lock plate from the lock position to the non-lock position when the brake pedal is depressed while the shift rod is in the parking position; One end of the control plate is releasably positioned in the lock plate, and when the control lever is in the first position, the lock plate is allowed to move to the lock position. Is provided in the second position, the control arm is provided integrally with the control lever for holding the lock plate in the unlocked position.

(Operation) When the shift rod is in the parking position and the brake pedal is not depressed, the lock plate is moved to the locked position by the elasticity of the return spring, and the shift rod is moved to the parking position. Since it is locked at, the selector lever cannot be moved to another range position. At this time, the control lever is placed in the first position, which does not prevent the lock plate from moving toward the lock position.

When the brake pedal is stepped on while the shift rod is in the parking position, the connecting means connecting the pedal and the lock lever, the lock lever resists the elasticity of the return spring. Is moved to the unlocked position so that the selector lever can be moved to another range position.

When the shift lock is released and the shift rod is rotated to a position other than the parking position, the control pin swings the control lever to the second position and the control arm integrated with this locks the lock lever. Hold the lever in the unlocked position.

(Example) Hereinafter, the present invention will be described in detail based on one example shown in the drawings.

In FIG. 1, on a steering column 2 that rotatably supports a steering shaft 1, a shift rod 4 to which a selector lever 3 is fixed is attached.
Is attached so as to be freely movable and rotatable in the Y direction. The shift rod 4 selects a traveling condition by operating the selector lever 3. The selected range is
You need to keep this. At a proper position of the steering column 2, a base end portion 5a of a detent plate 5 having a plurality of range positions is fixed. Of the range positions, only the parking position P is formed at a position independent of the other positions, and includes a reverse position R and a recess 5c formed with the projection 5b as a boundary. A detent pin 6 is fixedly mounted on the shift rod 4 to selectively engage one of the range positions of the detent plate 5 for holding the rod in the selected range.
The shift rod 4 in which the detent pin 6 is engaged with the parking position P cannot be rotated in the Y direction to another range position until it is moved in the arrow X direction.

A support shaft 7 is arranged along the steering column 2. This support shaft 7 is used for the steering column 2
It is supported by a bracket (not shown) fixed to. The tip 8a of the support shaft 7 is attached to the shift rod 4
The base end 8b of the lock plate 8 which is positioned so as to be engageable with (see FIG. 2) is supported. The lock plate 8 is made of a highly rigid member, and is also rotatable with respect to a highly rigid support shaft and is supported so as not to move in the axial direction. The front end portion 8a of the lock plate has a control unit which forms a connecting means described later.
One end 9a of the cable 9 is joined. FIG. 1 shows a state in which the detent pin 6 is engaged with the parking position P. The shift rod 4 in this position has one side edge 8c of the lock plate 8 attached thereto.
A lock pin 10 which is engaged and disengaged with is fixedly planted. As shown in FIG. 2, the lock plate 8 engages with the lock pin 10 to restrict the shift rod 4 from moving in the axial direction X, and as shown in FIG. Lock pin
By retreating from the movement locus of 10, it is swingably provided between the shift rod 4 and an unlocked position that does not hinder the movement of the shift rod 4 in the axial direction X. A tight return spring 12 is stretched between a locking portion 8d formed on the lock plate 8 and a bracket 11 fixed to the steering column 2. This return spring 12
Thus, the locking plate 8 is provided with a habit of moving in the direction of the arrow a toward the locking position where the tip of the locking plate 8 abuts the shift rod 4 to prevent the locking pin 10 from moving in the X direction. There is.

The brake pedal 13 of the service brake has a support shaft 13a.
It is provided so that it can swing around. The other end 9b of the control cable 9 is connected to the brake pedal 13. Lock plate 8 and brake pedal
The connecting means for connecting with 13 is not limited to the control cable 9, but may be a rod or a link.

A control lever 14 is supported on the support shaft 7 so as to be separated from the lock lever 8 so as to be rotatable and not to move in the axial direction. The control lever 14 has a control arm 15 and an elongated hole 14a. The control arm 15 is formed so as to be substantially parallel to the support shaft 7, and one end 15a thereof extends to a position where it can be engaged with and disengaged from the lock lever 8. In the illustrated example, the control arm 15 is formed integrally with the control lever 14, but this arm may be a member separate from the control lever.

A distal end portion 16a of a control pin 16 fixedly mounted on the shift rod 4 is loosely engaged with the elongated hole 14a of the control lever 14. The tip 16a is the shift rod 4
It runs parallel to. Control lever 14 has a long hole
Depending on the relative position of 14a and control pin 16, it is swung between a first position shown in FIG. 2 and a second position shown in FIG.

The structure of the control lever 14 will be described with reference to FIGS. 2 and 3. The long hole 14a includes an arcuate engagement portion 14b and a step portion 14c formed continuously with the engagement portion 14b. As shown in FIG. 2, when the shift rod 4 is placed in the parking position (see FIG. 1), the control lever 14 has its stepped portion 14c engaged with the control pin 15. It is located in position 1. Then, as shown in FIG. 3, when the shift rod 4 is moved to a range other than the parking position, the control lever 14 is rotated counterclockwise about the support shaft 7 by the control pin 16. Rocked to. The operation of the ignition key portion is necessary for the control lever 14 to be displaced to the second position, which will be described later. FIG. 3 shows the state in which the shift rod 4 has been rotated slightly more than the angle θ1 required to get out of the parking position, and the control pin 16 causes the control lever 14 to swing by the angle θ2. Has been. When the control lever 14 is swung by the angle θ2, the control pin located on the stepped portion 14c
16 is disengaged from the step. Control lever
Arc-shaped engaging portion 14 when 14 is swung by an angle θ2
The center of the arc of b is set to be substantially at the same position as the rotation center axis of the shift rod 4. In other words,
The arc-shaped engaging portion 14b at the position where the control lever 14 is swung by the angle θ2 shifts the center thereof.
It is formed in an arc shape that is substantially the same as the rotation center of the rod 4. Therefore, as shown in FIG. 3, when the shift rod 4 is swung to an angle θ1 or more, that is, a position other than the parking position, the movement locus of the control pin 16 moves along the arcuate engagement portion 14b. , The pin moves without rocking the control lever 14. As shown in FIG.
The position of the control lever 14 when the pin 16 is engaged with the arcuate engagement portion 14b is referred to as the second position.

Further, as shown in FIG. 3, when the control lever 14 swings by the angle θ2, the control cable 17 connected to the locking portion 14d of the control lever 14 is pulled by the length S. As shown in FIG. 1, this length S is long enough to move the operating member 19a of the interlocking means 19 of the ignition key portion 18 from the locked position to the unlocked position. The ignition key section 18 is, as is well known,
The ignition key 20 is configured to be attachable / detachable only when the ignition key 20 is located at the lock position LOCK. The interlock means 19 is a means for enabling the attachment / detachment of the ignition key only when the selector lever 3 is placed not only in the lock position LOCK but also in the parking position. A structure has been proposed. In the embodiment shown, the control lever 14 allows the actuating member 19a to be in the locked position when the shift rod 4 is in the parking position, i.e. the ignition position. The key 20 can only be removed when it is in the locked position LOCK. Also, control
When the lever 14 is placed in the second position shown in FIG. 3, the operating member 19a is placed in the unlocked position so that the key cannot be removed. Therefore, when the ignition key 20 is placed in the lock position LOCK, the operating member 19a is placed in the lock position LOCK via the key cylinder (not shown). At this time, the control lever 14 is placed in the first position shown in FIG. 2, and the control lever 14 placed in this first position is
In order to swing the control pin 16, the ignition key 20, that is, the operating member 19a is locked at the lock position LO.
It is necessary to loosen the control cable 17 by rotating it from ck to at least the ACC position. In other words, in the illustrated embodiment, the actuating member 19a has a control pin 16, a control lever 14, and a control cable 17 when the shift rod 4 is not in the parking position, as shown in FIG. It will be blocked from moving through and will not be brought to the locked position.

The operation of the embodiment configured as described above will be described separately with reference to FIG. 4 depending on whether the shift position is the parking position or another position. In this embodiment, the engine can only be started when the selector lever 3 is in the parking position, which will be described later.

"Parking position" When the ignition key is in the locked position LOCK, the detent pin 6 of the shift rod 4 is
As shown in the figure, the recess 5c at the parking position P
Is located in. At this time, brake pedal 11
When is not depressed (brake is OFF), the lock plate 8 is placed in the lock position shown in FIG. 2 by the elasticity of the return spring 12. That is, lock
The plate 8 has one surface 8e, as shown in FIG.
Is abutted against the control arm 15, and its tip 8a is positioned so as to be engageable with the lock pin 10 of the shift rod 4. At this time, control lever 14
Is in the first position with its step 14c engaged with the control pin 16. Therefore, the brake pedal 11
Since the lock plate 8 is at the lock position that restricts the movement of the lock pin 10 in the direction of the arrow X when the pedal is not depressed, the selector lever 3 is operated to operate the detent pin of the shift rod 4. Parking 6
You cannot move from position P to another range position. When the brake pedal 11 is depressed (brake ON), the lock plate 8 is moved to the unlocked position against the elasticity of the return spring 12, as shown in FIG. Therefore, shift rod 4
Can be moved in the X direction, but the ignition /
When the key is in the lock position LOCK, since the operating member 19a of the interlock means is in the lock position to prevent the control lever 14 from swinging, the shift rod 4 cannot rotate. The operation of the selector lever 3 is also “disabled”.

When the ignition key is rotated to the ACC position and the brake pedal is not depressed (brake OFF), the lock plate 8 is held at the lock position shown in FIG. The operation of and the movement and rotation of the shift rod 4 are “impossible”. brake·
When the pedal 11 is depressed (brake ON), as shown in FIG. 3, the lock plate 8 is swung to the unlocked position, so that the selector lever can be operated, that is, the shift rod can be moved and rotated. However, since the control lever 14 rotates by the angle θ2 to move the operating member 19a of the interlock means to the lock position, the attachment / detachment of the ignition key 20 is “impossible”. In this case as well, the engine is off and the vehicle will not start.

The action of the shift rod 4 and selector lever 3 that accompanies the brake ON / OFF when the ignition key is turned from the engine OFF state to the ON / start position is AC.
The same when placed in the C position.

Substantially disengagement of the shift lock effect is effective with the engine turned on. Ignition key 20
Was rotated to the engine ON position after the engine was started,
Brake pedal 11 is not depressed (Brake OF
F) and the lock plate 8 is the return spring 12
Is held in the lock position (see FIG. 2) by the elastic force of. As shown in FIG. 2, when the lock plate 8 is in the lock position and restricts the movement of the lock pin 10, the shift rod 4 cannot move in the axial direction. Therefore, since the detent pin 6 cannot be pulled out from the recess 5c (see FIG. 1) at the parking position P, the operation of the selector lever 3 also becomes "impossible" and the select operation to the running range cannot be performed. Next, brake pedal 11
When is depressed, the lock plate 8 is moved to the unlocked position via the control cable 9 as shown in FIG. 3, and the selector lever 3 and the shift rod 4 are moved in the X direction and the Y direction. The rotation to becomes "OK",
Selector lever operation becomes "OK".

As described above, in order to move the selector lever 3 locked in the parking position to another position, the shift lock cannot be released unless the brake pedal 11 is depressed, so the selector lever is operated. When the desired gear range is selected, the vehicle will try to start suddenly if the engine speed is high, but the driver puts his foot on the brake pedal and there is a slight difference. If so, it is in a state of being depressed, so that the pedal can be further depressed to immediately deal with this, and sudden start can be suppressed.

“Other than parking position” When a gear position other than the parking position is selected, the shift rod 4 rotates between the reverse position R and the low position L (see FIG. 1) depending on the running state. Be moved. When the shift rod 4 is rotated with the brake pedal 13 depressed and the lock plate 8 placed in the unlocked position, control
The pin 16 moves along the arcuate engagement portion 14b between the position shown by the solid line and the position shown by the chain line in FIG. 3, and holds the control lever 14 at the second position in which the control lever 14 is swung by the angle θ2. is doing. Therefore, the operating member of the interlock mechanism 19
19a is adapted to be held in the unlocked position.
Therefore, the attachment / detachment of the ignition key 20 is “impossible” in the gear ranges other than the parking position.

On the other hand, when the shift rod 4 is moved to a position other than the parking position by operating the selector lever 3, the control pin 16 engaged with the step portion 14c of the control lever 14 moves the lever 14 to the position other than the parking position. Swing by angle θ2. When the control lever 14 is placed in the second position shown in FIG. 3, the control arm 15 integrated with the lever 14 swings in the same direction to engage the tip 15a thereof with the one surface 8d of the lock plate 8. Combined and hold the plate 8 in the unlocked position. The unlocked position of the lock plate 8 is a position retracted from the rotation path of the lock pin 10, so that the pin 10 that rotates with the select operation does not engage with the lock plate 8. By pressing the brake pedal 11, the lock plate 8
Is further swung counterclockwise from the lock position shown in FIG. 3, but since the elasticity of the return spring 12 is reduced, it does not become a load of the brake pedal force.

Next, the operation of the interlock mechanism will be described. As shown in FIG. 3, when the shift rod 4 is placed at a position other than the parking position, the control
The pin 16 swings and holds the control lever 14 in the second position. In this state, since the operating member 19a is located at the unlocked position, the ignition key 20 cannot be returned to the locked position LOCK. In other words, the engine cannot be turned off. Of course, it is not possible to attach / detach the ignition key. Shift rod 4
As shown in FIG. 2, when the control pin 16 is placed in the parking position, the control pin 16 swings to a position where it can be engaged with the stepped portion 14c. Therefore, the ignition key 20 is rotated to move the operating member. Since 19a can be swung to the lock position, the control lever 14 can be returned to the first position via the control cable 17. Therefore, the ignition key 20 is provided when the selector lever 3 is not in the parking position.
In other words, it cannot be detached unless the shift lock is set. In other words, the engine can only be started if the gears are in shift lock. By using the control lever 14, which is one component of the gear shift lock device, as a component of the key interlock mechanism as in the illustrated embodiment, the structure of both mechanisms can be simplified.

As shown in FIG. 2, the shift rod 4 is connected to the parking
When the control lever 14 is returned to the position and the control lever 14 is returned to the first position with the control pin 16, the control arm 15 integrated with the lever is also returned, and if the brake pedal 13 is not depressed, the lock plate 8 is allowed to swing to the lock position shown in FIG. 2 and is placed in the shift lock state. The control lever 14 is returned to the first position, and the interlock mechanism 19 is returned to the unlocked position via the cable 17, so that the ignition key 20 can be rotated to the LOCK position and can be removed. Becomes

(Effects of the Invention) As described above, according to the shift lock device for an A / T vehicle of the present invention, the shift lock can be released by depressing the brake pedal, and after the release, the selector lever moves to the parking position. When a range other than is selected, the control lever holds the lock plate in the unlocked position, so the load on the brake pedal is not applied. Further, since the lock pin that rotates with the operation of the selector lever during traveling is not blocked by the lock lever from rotating, the shift lock has high reliability.

[Brief description of drawings]

FIG. 1 is a perspective view of a shift lock device showing an embodiment of the present invention, and FIG. 2 is a shift rod in a parking position, a lock plate in a lock position, and a control lever in a first position. Fig. 3 is a plan view of the main part of the above, showing the state in which the shift rod is parked.
When the lock plate is in a position other than the position, the lock plate is in the unlocked position, and the control lever is in the second position, FIG.
It is a figure which shows the operating relationship of each member in positions other than a position and a parking position. 3 ... Selector lever, 4 ... Shift rod, 8 ...
… Lock plate, 9 …… Connecting means, 10 …… Lock ・
Pin, 12 ... Return spring, 13 ... Brake
Pedal, 14 ... control lever, 15 ... control arm, 16 ... control pin.

Claims (1)

[Claims] 1. An automatic transmission in which a gear position of a transmission is designated by selecting a position of a selector lever, which is provided so as to be axially movable and rotatable in response to a gear position selecting operation of the selector lever. The shift rod, the lock pin fixed to the shift rod, the lock position that engages with the lock pin to restrict the axial movement of the shift rod, and the movement trajectory of the lock pin. A lock plate that is retracted and is movable between an unlocked position that does not impede the movement of the shift rod in the axial direction and the rotation direction, and a lock plate that moves toward the locked position with respect to the lock plate. The return spring that gives the habit of movement, the control pin fixed to the shift rod, and the shift rod A first position, which is moved by the control pin when the shift rod is placed in a position, and a position which is moved by the control pin when the shift rod is placed in a position other than the parking position. The control lever, which is swingably provided between the shift rod and the second position, is connected to the brake pedal and the lock plate, and the shift rod is placed in the parking position. Connecting means for moving the lock plate from the lock position to the non-lock position when the brake pedal is depressed, and one end of the connecting means being disengageable from the lock plate, and the control lever is Allow the lock plate to move to the lock position when in the 1 position. A control arm integrally provided with the control lever, which holds the lock plate in the unlocked position when the control lever is in the second position. Shift lock device.