JP2917101B2 - Shift lever device for automatic transmission - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift lever device for an automatic transmission, in which a shift lever is locked by using a cable, and more particularly to a shift lock structure for improving the operation feeling when the shift lock is released.

[0002]

2. Description of the Related Art In vehicles, a shift lock mechanism is employed to prevent erroneous operation of a shift lever at the time of starting. As one example of a shift lock mechanism, a technique is known in which a solenoid is excited when a brake pedal is depressed in a state where the shift lever is shifted to a parking range (P range), and the shift lock of the shift lever is released.
There is also known a shift lock mechanism using a cable interlocked with the movement of a shift lever.

FIG. 8 shows an example of a conventional shift lever device for an automatic transmission. In FIG. 8, reference numeral 2 denotes a shift lever that is swingably supported by the base plate 1. The shift lever 2 has a shift button (not shown)
And a detent pin 3 which is moved downward by pressing the shift button. Detent pin 3
Can be engaged with the detent plate 4 at a plurality of positions. The base plate 1 is provided with a shift lock plate 5 that can be engaged with the detent pin 3 only when the shift lever 2 is in the P range so as to be slidable in the vertical direction.

A cable lever 7 to which a cable 6 is connected is swingably provided on the base plate 1.
A pin 7a provided at one end of the cable lever 7 is provided with an S-shaped cam groove 5a formed on the shift lock plate 5.
It is fitted in. The cable 6 is used to prevent an ignition key (not shown) inserted into a key cylinder (not shown) from coming off, and the ignition key cannot be removed except at the LOCK position of the key cylinder. The base plate 1 is provided with a solenoid (not shown) that can engage with the shift lock plate 5 and prevent the shift lock plate 5 from descending.

When the shift lock plate 5 is engaged with the detent pin 3, the shift lock plate 5 is biased upward by a biasing force of a spring (not shown) provided in the shift lever 7. In this state, since the detent pin 3 is also engaged with the detent plate 4, the shift operation of the shift lever 2 becomes impossible. When the vehicle starts,
When the brake pedal (not shown) is depressed, the solenoid is excited and the engagement between the solenoid and the shift lock plate 5 is released. Therefore, the shift lock plate 5 can be pressed down by pressing the detent pin 3 with the shift button, and the shift lever 2 can be shifted to a range other than the P range.

[0006]

However, the shift lever device shown in FIG. 8 has the following problems. Since the shift lock plate has a structure that slides in the vertical direction, it is necessary to provide a slight gap in the sliding portion in order to smoothly move the shift lock plate. Therefore, there is a problem that rattling sound is generated due to the gap. Conventionally, grease has been applied to the sliding portion to suppress the rattling noise. The swinging of the cable lever 7 in the left-right direction can be obtained by converting the vertical movement of the shift lock plate 5 with the S-shaped cam groove 5a. The larger the stroke, the better. However, since the amount of movement of the shift lock plate 5 depressed by the shift button is also limited, in order to secure a large stroke of the cable lever 7, the inclination angle of the cam groove 5 a must be reduced or the cable lever 7 cannot be moved. It is necessary to increase the lever ratio, and as a result, there is a problem that the operation force of the shift button increases.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a shift lever device for an automatic transmission capable of preventing rattling noise of a shift lock mechanism and improving the operation feeling when the shift lock is released. It is in.

[0008]

A shift lever device for an automatic transmission according to the present invention which achieves this object is as follows. A shift lever having a detent pin swingably supported by the base plate and interlocking with the movement of the shift button; engaging at a plurality of positions in the shift direction of the detent pin and the shift lever to position the shift lever in a plurality of ranges; A detent plate, a shift lock lever that is swingably supported by a shaft portion of the base plate, and has a regulating surface with which the detent pin can abut.
When the shift lever is in the P range, the shift lock lever is swung by the shift button by being engaged with the shift lock lever. An actuator for blocking and releasing the engagement with the shift lock lever by depressing the brake pedal; and contacting with a guide pin provided on the shift lock lever and fixed to the shift lever when the shift lever is out of the P range. A shift lever device for an automatic transmission, comprising: a guide flange portion that keeps a swing angle of a shift lock lever constant.

[0009]

According to the shift lever device for an automatic transmission of the present invention,
The shift lock lever, to which the detent pin can abut, is swingably supported by the shaft of the base plate.Therefore, the shift lock lever can be attached to the shaft without any gap between the shaft and the shift lock lever. It can be swung smoothly as the center. Accordingly, the shift lock lever hardly rattles with respect to the shaft portion, and rattling noise is prevented. When the shift lever is in the P range, the shift lock lever and the actuator are engaged, so even if the detent pin is pressed down by the shift button, the detent pin abuts on the regulating surface of the shift lock lever. However, the engagement between the detent pin and the detent plate cannot be released. Therefore, it becomes impossible to shift the shift lever to a range other than the P range. If the brake pedal is depressed while the shift lever is in the P range, the engagement between the shift lock lever and the actuator is released by the operation of the actuator, and the shift lever P
Shift operation to other than the range becomes possible. Since the end of the cable is engageable with the key cylinder, if the shift lock lever is depressed by the detent pin, the movement of the cable causes the end of the cable to engage with the key cylinder, and the ignition from the key cylinder It is possible to prevent the key from coming off. Shift lever is P
In the range other than the range, the swinging posture of the shift lock lever is kept constant by the contact between the guide flange and the guide pin, so that the end of the cable and the key cylinder remain engaged, and the shift lever is moved to the P position. Unless the shift is made to the range, the ignition key is prevented from falling out of the key cylinder. Since the cable is moved by the swing of the shift lock lever, there is no need to convert the linear motion into the swing motion by the cam groove unlike the conventional device, and the operating force of the shift button may be small.

[0010]

1 to 6 show an embodiment of the present invention. In FIG. 1, reference numeral 20 denotes a base plate made of a synthetic resin. A shift lever 21 is swingably supported on the base plate 20 via a shaft 22. Near the top of the shift lever 21,
A shift button 23 is provided. Shift lever 21
A detent pin 24 interlocked with the shift button 23 is provided at the lower part of. A detent plate 25 is provided on the base plate 20. The detent pin 25 has a detent pin 24 on the shift lever 2.
A plurality of step surfaces 25a engaging in one shift direction are formed.

A shaft 27 is formed on the base plate 20. A shift lock lever 30 is swingably supported by the shaft 27. The shift lock lever 30 is formed with a cylindrical portion 31 fitted to the shaft portion 27,
A claw 32 for retaining is formed at the tip of the cylindrical portion 31. The shift lock lever 30 is swingable about a cylindrical portion 31, and the cylindrical portion 31 is fitted to the shaft portion 27 almost completely. The top surface of the shift lock lever 30 is formed on a regulating surface 33 to which the detent pin 24 can abut. The regulating surface 33 is formed as a curved surface having a radius R _{1 about} the swing center X of the shift lever 21. The shift lock lever 30 has an engagement surface 35 that can be engaged with a solenoid 50 described later. A connection pin 34 is formed at one end of the shift lock lever 30. The connection pin 34 is connected to a cable 40 that transmits mechanical power.

The cable 40 is used for key interlock. As shown in FIG. 5, a terminal fitting 41 as a cable end is attached to the other end.
A holder 44 is provided near the key cylinder 42 into which an ignition key 48 for starting the vehicle is inserted. The terminal fitting 41 is movably held by a holder 44. The terminal fitting 41 is urged by a spring 45 in a direction away from the shift lock lever 30.

A key cylinder 42 is provided near the holder 44.
Is provided with a key cylinder cam 43 interlocked with the movement of an ignition key 48 inserted into the key cylinder cam 43. Terminal fitting 41
Can be engaged with the key cylinder cam 43 in the rotational direction. As shown in FIG. 6, the position of the ignition key 48 with respect to the key cylinder 42 is LOCK, ACC
(Accessory), ON, and START. LO
CK is a position where the ignition key 48 is inserted. When the ignition key 48 is at a position other than the LOCK position, the key cylinder cam 43 is engaged with the end metal fitting 41 in the rotation direction. Kission key 48
Is rotated from the LOCK position to the ACC position, a device such as a radio in the vehicle compartment can be turned on. When the ignition key 48 is rotated to the START position after passing the ON position, the engine can be started by the motor. When the ignition key is released in this state, the ignition key 48 automatically returns to the ON position. When the vehicle is running, the ignition key 48 is ON
Position.

A solenoid 50 as an actuator is provided on the base plate 20 side. The solenoid 50 has a plunger 51 and a spring 52. The solenoid 50 is excited by the depressing operation of a brake pedal (not shown) when the ignition key 48 is in the ON position and the shift lever 21 is in the P range. When the solenoid 50 is not excited, the plunger 51 is pushed out toward the engagement surface 35 of the shift lock lever 30 by the biasing force of the spring 52, and the engagement surface 35 of the shift lock lever 30 and the plunger 51 can be engaged. It has become. When the solenoid 50 is excited, the plunger 51 is attracted to the solenoid body and the shift lock lever 30
The engagement between the engagement surface 35 and the plunger 51 is released.

A guide pin (boss) 60 extending in the horizontal direction is fixed to the shift lever 21. When the shift lever 21 is in a range other than the P range, the shift lock lever 21 comes into contact with the guide pin 60 to keep the swing angle of the shift lock lever 21 constant.
1 is provided. In the present embodiment, the guide flange 61 and the shift lock lever 30 are integrally formed.
Upper surface 61a of the guide flange 61 of the guide pin 60 is in sliding contact is formed on the curved surface of radius R ₂ centered on the pivot center X of the shift lever 21, coincides with the movement locus of the guide pin 60. As shown in FIG. 7, the distal end of the guide flange portion 61 is preferably a bent portion 52 that bends downward so that the guide pin 60 can easily move on the upper surface 61 a of the guide flange portion 61.
Thereby, even if the vertical position of the guide flange portion 51 due to the variation in the pushing amount of the shift button 23 varies, the guide pin 60 can be easily moved to the guide flange portion 6.
1 can be guided to the upper surface 61a.

A lock release button 71 is mounted on the upper cover 70 covering the upper portion of the base plate 20 so as to be movable in the vertical direction. The plunger 51 of the solenoid 50 is provided with a lock release cam 72 having an inclined surface 72a that can slide on the lower end of the lock release button 71. The lock release cam 72 is formed integrally with the plunger 51 in this embodiment. When the lock release button 71 is pressed downward, the plunger 51 moves with the lock release cam 72 in a direction away from the engagement surface 35 of the shift lock plate 30. The lock release button 71 is used when the solenoid 50 cannot operate due to a significant voltage drop of the battery or the like.

Next, the operation of the shift lever device for an automatic transmission will be described. Shift lever 21
Is shifted to the P range, the detent pin 24 is urged upward by the urging force of a spring (not shown) housed in the shift lever 21, so that the shift lock lever 30 is (A). In this state, as shown in FIG.
4a.

When the shift lever 21 is in the P range, the engagement surface 35 of the shift lock lever 30 and the plunger 51 of the solenoid 50 are engaged, so that the brake pedal (not shown) is depressed. Even if the shift button 23 is pressed and the detent pin 24 is pressed down,
The shift lock lever 30 swings downward only to the position shown in FIG. Therefore, detent pin 2
4 is still engaged with the step surface 25a of the detent plate 25, and the shift operation of the shift lever 21 becomes impossible.

Next, when a brake pedal (not shown) is depressed by a predetermined amount or more, the plunger 51 moves in a direction away from the engagement surface 35 of the shift lock lever 30 by energizing the solenoid 50, and the shift lock lever 30 The engagement with the plunger 51 is released. Here, when the detent pin 24 is pressed down by pressing the shift button 23, the shift lock lever 30 swings downward to the position shown in FIG. In this state, the engagement of the detent pin 24 with the step surface 25a of the detent plate 25 is released, and the shift lever 21 can be shifted to a range other than the P range.

When the shift lever 21 is shifted to a range other than the P range, the guide pin 60 fixed to the shift lever 21 comes into sliding contact with the upper surface 61a of the guide flange portion 61. Since the top surface shape matches the movement locus of the guide pin 60, the swing angle of the shift lock lever 30 is kept constant even when the shift lever 21 is shifted to a range other than the P range.
Since the cable 40 is connected to the shift lock lever 30, the cable 40 is pulled by the swing of the shift lock lever 30 by the shift operation of the shift lever 21 from the P range, and the position of the terminal fitting 41 with respect to the key cylinder 42. Changes. When the shift lever 21 is shifted to a range other than the P range, the terminal fitting 41 is engaged with the key cylinder 42 in the rotation direction,
The ignition key 48 cannot be pulled out.

When the shift lever 21 is returned to the P range, the detent pin 24
And the detent pin 24 moves upward by the urging force of a spring (not shown) in the shift lever 21. Since the shift lock lever 30 is urged to swing upward by the spring 45 on the cable 40 side, the shift lock lever 30 swings upward with the rise of the detent pin 24 and returns to the state of FIG. . In this state, the engagement between the terminal fitting 41 and the key cylinder cam 43 is released, and the ignition key 48 can be removed from the key cylinder 42.

[0022]

According to the shift lever device for an automatic transmission according to the present invention, the following effects can be obtained. (1) Since the shift lock lever having a regulating surface with which the detent pin can abut is swingably supported on the shaft portion of the base plate, the gap between the sliding portions is reduced as compared with a structure that slides linearly. However, the shift lock lever can be smoothly moved. Therefore, the shift lock lever hardly rattles with respect to the shaft portion, and it is possible to prevent rattle noise. As a result, it is not necessary to apply grease for suppressing rattling noise. (2) The cable for preventing the ignition key from coming off the key cylinder moves by the swing of the shift lock lever. Therefore, it is necessary to convert the linear movement into the swing movement using the cam groove as in the conventional device. Nor. Therefore, the operation force of the shift button can be reduced, and the operation feeling of the shift lever when the shift lock is released can be improved.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a shift lever device for an automatic transmission according to an embodiment of the present invention.

FIG. 2 is a perspective side view of FIG. 1;

FIG. 3 is a perspective view of the shift lock lever of FIG. 1;

FIG. 4 is a front view showing a change in movement of a shift lock lever associated with a shift operation of the shift lever of FIG. 1;

FIG. 5 is an enlarged front view near the key cylinder of FIG. 1;

FIG. 6 is a front view showing a positional relationship between a key cylinder and an ignition key in FIG. 1;

FIG. 7 is a front view showing a modification of the shift lock lever of FIG. 3;

FIG. 8 is a front view showing an example of a conventional shift lever device for an automatic transmission.

[Explanation of symbols]

 Reference Signs List 20 base plate 21 shift lever 23 shift button 24 detent pin 25 detent plate 30 shift lock lever 40 cable 42 key cylinder 50 actuator (solenoid) 60 guide pin 61 guide flange

Claims (1)

(57) [Claims] 1. A base plate that is swingably supported by a base plate,
A shift lever having a detent pin interlocked with movement of a shift button; a detent plate engaged with the detent pin and the shift lever at a plurality of positions in a shift direction to position the shift lever in a plurality of ranges; and a shaft portion of the base plate. A shift lock lever having a regulating surface that is swingably supported on the detent pin and that can contact the detent pin; a cable connected to the shift lock lever, an end of which can be engaged with a key cylinder; An actuator for preventing the shift lock lever from swinging by the shift button by engaging with the shift lock lever when in the P range, and releasing the engagement with the shift lock lever by depressing a brake pedal; Provided on the lever, and the shift lever
A shift lever device for an automatic transmission, comprising: a guide flange portion that contacts a guide pin fixed to the shift lever when the shift lock lever is out of the range to keep the swing angle of the shift lock lever constant.