JPH092092A - Select lever lock device of automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the structure and to prevent sudden start after an engine is started. SOLUTION: A select lever lock device comprises a cam plate 7 where a detent pin 4 is engaged and a slider 21 is engaged with a select lever 1 positioned in a P range, which is rotatably provided, and a cable 10 is connected to the cam plate in such a manner that only when the select lever 1 is positioned in the P range, a key lock is released, and the slider 21 is controlled to move forward and backward, linking with the operation of a brake. The device further comprises a stopper for regulating the rotation of the cam plate 7 in such a manner that when the select lever 1 is positioned outside the P range, the cam plate 7 is not engaged with the detent pin 4. Thus, an engine can be started by inserting a key only when the select lever 1 is in the P range, and in order to shift the lever from the P range to the other range after the engine is started, it is always necessary to conduct the brake operation, so that shifting from the range outside the P range to the P range can be smoothed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a select lever locking device for an automatic transmission, which prevents a vehicle from suddenly starting immediately after starting the engine.

[0002]

2. Description of the Related Art In a vehicle such as an automobile equipped with an automatic transmission, an engine is started by setting a select lever to a P range or an N range, and when the engine is started, the select lever is switched to a travel range. In this case, if the engine speed becomes high for some reason, the engine will suddenly start as soon as the select lever is switched. Then select the lever P
After starting the engine in range or N range,
When the select lever is under certain conditions, for example, if the brake pedal is not depressed, the lock device provided on the select lever will operate to prevent the select lever from being operated or to depress the brake pedal. A mechanism has been devised.

[0003]

Such a conventional device can prevent a sudden start after starting the engine as long as the device is properly operated, but the operation is complicated and the lock device is released. There was a problem that the mechanism became complicated. The present invention provides a select lever lock device for an automatic transmission that solves this problem.

[0004]

Means for solving the above problems are as follows from the description of claim 1 according to the present invention.
In the automatic transmission, a detent pin is erected at the base of the select lever, and the detent pin is penetrated into a detent hole of a detent plate provided in the vicinity of the select lever to guide the shift range of the select lever. A cam plate, to which a detent pin is engaged, is rotatably attached to the plate while the select lever is positioned in the P range, and a base of a cable connected to a key lock portion of an ignition switch is attached to a tip of the cam plate. A slider that engages the ends so that the key lock is released only when the select lever is in the P range, and engages with the cam plate when the select lever is in the P range. Is supported by the detent plate so that it can move back and forth, and the slider is linked to the operation of the brake. The detent plate is provided with a stopper that controls the rotation of the cam plate so that the detent pin does not engage with the cam plate when the select lever is located at a position other than the P range. It is characterized by being provided.

Next, how the invention can be solved by the invention understood from the above claims will be described. In the present invention grasped from the description of claim 1, a cam plate engaged with a detent pin is pivotally mounted on the detent plate in a state where the select lever is positioned in the P range of the detent plate, The lock of the key is released only when the select lever is in the P range by connecting the base end of the cable connected to the key lock part of the ignition switch to the tip of the cam plate. The key can be inserted into the key cylinder to start the engine only when is in the P range, and when the engine is stopped and the key is removed from the key cylinder, the select lever must be in the P range. Will be.

As described above, when the engine is started, the select lever is always in the P range, and the slider that engages with the cam plate can be moved back and forth while the select lever is in the P range. Since the slider is supported on the detent plate and the slider is linked to the operation of the brake to control the advance / retreat, the brake must be operated to move the select lever from the P range to another range after the engine is started. Must.

A stopper for restricting the rotation of the cam plate is provided on the detent plate so that the detent pin does not engage with the cam plate when the select lever is located at a position other than the P range. Therefore, when the select lever is moved from a position other than the P range to the P range, the detent pin can be moved so as not to engage with the cam plate.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention as understood from the description of the above claims will be described. In the present invention as understood from the description of claim 1, as shown in FIG.
A detent pin 4 is planted at the base of the select lever 1, and the detent pin 4 is passed through a detent hole 6 of a detent plate 5 provided in the vicinity of the select lever 1 to guide the shift range of the select lever 1. In the automatic transmission, the recess 9 with which the detent pin 4 engages when the select lever 1 is in the P range
The cam plate 7 having the above is rotatably attached to the detent plate 5.

Then, the base end of the cable 10 connected to the key lock portion of the ignition switch 11 shown in FIG. 2 is connected to the tip of the cam plate 7, and the key of the key is operated only when the select lever 1 is in the P range. Allow the lock to be released. Further, the cam plate 7 is provided with a concave portion 22, and a slider 21 which engages with the concave portion 22 of the cam plate 7 is supported by the detent plate 5 so as to be able to move forward and backward while the select lever 1 is positioned in the P range. . Then, the slider 21 is controlled to move back and forth in association with the operation of the brake.

Further, as shown in FIG. 6, the select lever 1
A stopper for restricting the rotation of the cam plate 7 so that the detent pin 4 does not engage with the concave portion 22 with which the slider 21 engages when the detent pin 4 provided on the position other than the P range is located. 23 is provided on the detent plate 5.

[0011]

An embodiment of the present invention will be described below. In FIG. 1, reference numeral 1 denotes a select lever, which is supported by a bracket 2 which is a member on the vehicle body side so as to be rotatable around a shaft 3. The select lever 1 is provided with a detent pin 4 and penetrates the detent hole 6 of the detent plate 5. The detent hole 6 is a step hole as shown in the figure, and the detent pin 4 is kept in an inclination corresponding to the shift position by engaging with this step portion.

A cam plate 7 is attached to the detent plate 5.
Are rotatably supported by a shaft 8. A recess 9 is formed in the cam plate 7 so that the detent pin 4 can be fitted therein. Due to this fitting, when the select lever 1 is moved, the cam plate 7 also rotates in conjunction with this at a certain position. One end of a cable 10 is connected to a part of the cam plate 7. The other end of the cable 10 extends into the passenger compartment and reaches an ignition switch 11 shown in FIG.

The ignition switch 11 has a key insertion opening 12
By inserting a key into a key cylinder (not shown) inside and rotating the key, the lock mechanism of the steering wheel is driven and the electric circuit is switched. A lock claw 13 is provided on the upper portion of the key insertion opening 12 so as to be in contact with the shaft 14, and the tip of the lock claw 13 enters the key insertion opening 12 as shown in FIG. When engaged with the tip of the, the key is the ignition switch
You will not get out of 11. Part of the shaft 14 is tapered
It is formed into 15 and is adapted to be moved by the cable 10. The lock claw 13 is driven to move back and forth toward the key cylinder by the contact with the tapered portion 15.

As shown in FIG. 1, a solenoid 16 is attached to the bracket 2, and a plunger 17 is inserted into and retracted from the solenoid 16. The plunger 17 has a boss 18 at the tip thereof, and a tension spring 19 is interposed between the boss 18 and the solenoid 16. As a result, the plunger 17 is pulled into the solenoid 16 when the solenoid 16 is not energized.

A slider 21 is rotatably attached to the boss 18 via a joint 20. The slider 21 has a pointed tip, and its portion faces the cam plate 7. The cam plate 7 has a slider 21
The concave portion 22 corresponding to is formed. The slider 21 is adapted to project to the left in the figure when the solenoid 16 is energized. Reference numeral 23 is a guide for the slider 21.

Next, referring to FIGS. 5 and 6, the detent plate 5 is provided with a stopper 23. As shown in FIG. 7, the stopper 23 is formed by projecting the detent plate 5 by pressing. Stopper
When the select lever 1 is at a position other than P, the reference numeral 23 serves to regulate the movement of the cam plate 7 from the original position (the position shown in FIG. 5) for some reason. The state of FIG. 6 shows that the cam plate 7 is rotated counterclockwise and the position is regulated by the stopper 23.

FIG. 8 shows a device for limiting the movement of the cam plate 7. This is a part of the cam plate 7 that protrudes and has a spring 24 and a ball inside.
It is through 25. By fitting the ball 25 into the groove 26 provided in the detent plate 5, a proper resistance can be given.

In the embodiment described above, the slider 21 is made to project when the solenoid 16 is energized, but this can be replaced by the compression spring 27 by changing the position as shown in FIG. . In addition, the slider 21 and the boss
The connection with 18 may be made not by the shaft 20 but by a structure in which the slider 21 is retracted by interposing a compression spring 28 as shown in FIGS. 10 and 11, and further by sliding without using the spring. The slider 21 may enter the inside of the boss 18.

The operation of this embodiment thus constructed will be described below. When the select lever 1 is in the P range, the detent pin 4 is attached to the detent plate 5.
A cam plate 7 having a recess 9 for engaging with is pivotally mounted, and the base end of a cable 10 connected to a shaft 14 of an ignition switch 11 is connected to the tip of the cam plate 7 so that the select lever 1 moves to P. Since the key is unlocked only when it is in the range, as shown in FIG. 1, when the select lever 1 is in the P range, the detent pin 4 of the cam plate 7 moves. By fitting the cam plate 7 in the recess 9 and rotating the cam plate 7 around the shaft 8 to move the cable 10 in the direction of arrow B (see FIG. 4), the shaft 14 of the ignition switch 11 is moved to the third position. By pushing the lock claw 13 to the left in the figure and retracting the lock claw 13 from the key insertion opening 12, the key cylinder (not shown) is unlocked, and the key is removed from the key cylinder or inserted into the key cylinder. Ready to go.

Thus, only when the select lever 1 is in the P range, the key is inserted into the key cylinder,
Since it is possible to remove the key from the key cylinder, the engine is stopped, the vehicle is parked, and when the key is removed, the select lever 1 is always in the P range, and therefore the select lever 1 will be the next time the engine is started. The engine will always be started in the P range.

In this way, when the engine starts and the vehicle travels next, the select lever 1 must be moved from the P range to another range. In this case, the cam plate 7 is provided with the concave portion 22, and the select lever 1
Is located in the P range, the concave portion of the cam plate 7
Since the slider 21 engaging with 22 is supported on the detent plate 5 so as to be able to move forward and backward, and the slider 21 is controlled to move forward and backward in association with the operation of the brake, the slider 21 rotates the cam plate 7 unless the brake is operated. The movement is locked, and the movement of the select lever 1 to another range can be locked.

That is, the energization condition of the solenoid 16 is set so that the solenoid 16 is energized when the brake pedal is not depressed and the engine speed is higher than a certain value. When the solenoid 16 is energized, the plunger 17 is projected against the elastic force of the tension spring 19. As a result, the slider 21 is moved to the cam plate 7 side.

Therefore, in order to switch the select lever 7 to another range from the state where the select lever 1 is in the P range position, the condition that the brake pedal is depressed and the engine speed is lower than a certain value is satisfied. Then, the solenoid 16 must be de-energized. Further, when the vehicle is traveling with the brake pedal not depressed and the engine speed is high, the condition for energizing the solenoid 16 is satisfied, and the slider 21 is in the state of moving to the cam plate 7 side. Since the slider 21 is movably supported by the detent plate 5 so as to engage with the recess 22 of the cam plate 7 when the select lever 1 is in the P range, the select lever 1 is in a range other than the P range. When it is positioned at, the slider 21 and the concave portion 22 are not engaged, and the range of the select lever 1 can be switched regardless of the energization of the solenoid 16. In addition,
The solenoid 16 is adapted to be energized only when the ignition switch is ON.

Further, as shown in FIG. 6, the select lever 1
The detent plate 5 is provided with a stopper 23 for restricting the rotation of the cam plate 7 so that the detent pin 4 does not engage with the concave portion 22 when the detent pin 4 provided at the position other than the P range is located. When the select lever 1 is returned to the P position from the state of FIG. 6, the detent pin 4 pushes the outer profile of the cam plate 7, and the cam plate 7 rotates clockwise, Returning to the original position shown, the detent pin 4 is directed to the recess 9.

[0025]

As described above in detail, according to the present invention, which can be understood from the detailed description of the invention based on the description of claim 1, in order to remove the key and park the vehicle, the select lever is always pushed. Must be in the range, so the select lever must be in the P range the next time the engine is started, and if the select lever is not in the P range when starting the engine, the key to the key cylinder will Since it cannot be inserted, starting of the vehicle can be reliably prevented when the engine is started.

Further, when the engine is started and the select lever is in the P range and the select lever is switched from the P range to another range, the select lever is not in the P range unless the brake pedal is depressed. Since it is not possible to switch to another range, it is possible to reliably prevent a sudden start of the vehicle. When the select lever is not in the P range, the cam plate and the slider do not engage with each other, so that the range other than the P range of the select lever can be freely switched, and normal traveling can be performed.

When the select lever is located at a position other than the P range, the detent plate is provided with a stopper for restricting the rotation of the cam plate so that the detent pin does not engage with the cam plate with which the slider engages. ,
When the select lever is moved from a position other than the P range to the P range, the detent pin can be moved so as not to engage with the cam plate, so that the range of the select lever can be smoothly switched.

[Brief description of drawings]

FIG. 1 is a front view showing one embodiment of the present invention.

FIG. 2 is a vertical sectional view of an ignition switch.

FIG. 3 is a vertical sectional view taken along the line III-III in FIG.

FIG. 4 is a front view showing an operating state of the cam plate in FIG.

5 is a front view showing a portion of the detent plate of FIG. 1 provided with a stopper.

6 is a front view showing a rotating state of the cam plate in FIG.

7 is a vertical cross section taken along line VII-VII of FIG.

8 is a vertical cross section taken along the line VIII-VIII of FIG.

9 is a front view showing another attachment of the solenoid in FIG. 1. FIG.

FIG. 10 is a vertical cross-sectional view showing another attachment structure of the slider in FIG. 1.

11 is a cross-sectional view taken along the line XI-XI of FIG.

[Description of sign]

 1 Select Lever 4 Detent Pin 5 Detent Plate 6 Detent Hole 7 Cam Plate 9 Recess 10 Cable 11 Ignition Switch 21 Slider 23 Stopper

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location // F16H 59:54

Claims (1)

[Claims] 1. An automatic transmission in which a detent pin is planted at the base of a select lever, and the detent pin is passed through a detent hole of a detent plate provided in the vicinity of the select lever to guide the shift range of the select lever. In the machine, a cam plate with which the detent pin engages is pivotally attached to the detent plate while the select lever is positioned in the P range, and a key lock portion of an ignition switch is attached to a tip end of the cam plate. The lock of the key is released only when the base ends of the connected cables are connected so that the select lever is in the P range, and the cam plate is in a state in which the select lever is in the P range. The detent plate supports a slider that engages with the detent plate so that the slider can be operated. A stopper for controlling the movement of the cam plate so that the detent pin does not engage with the cam plate when the select lever is located at a position other than the P range in cooperation with the work. Is provided on the detent plate, and a select lever locking device for an automatic transmission.