JPH08200480A - Shift lock device of automatic transmission for vehicle - Google Patents

Abstract

PURPOSE: To improve durability further to reduce consumption of a power supply by making a device shiftable with a current carried in an electromagnetic solenoid only when performed shift operation from a P position, so as to suppress heat generation to a minimum limit in the electromagnetic solenoid. CONSTITUTION: A device comprises a lockup cable 6 of fixing a shift lever 1 to a P position by a parking lock member 3 when placed in a tense condition, electromagnetic solenoid 7 interposed in the halfway of this lockup cable 6 to tension it by spring tension of a solenoid spring 75 and a power supply circuit 8 for electrically connecting the electromagnetic solenoid 7 to a power supply. In the power supply circuit 8, only when turned on all of an ignition switch 5, a P position switch 82 and a stop switch 83, the electromagnetic solenoid 7 is connected to the power supply, and the lockup cable 6 is stroke-moved to release fixing a shift lever 1 to the P position, so as to make the shift lever shiftable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift lock device with a key interlock mounted on a shift mechanism of an automatic transmission.

[0002]

2. Description of the Related Art In a vehicle equipped with an automatic transmission, a shift lock device with a key interlock (hereinafter referred to as a shift lock device) having the following functions as an erroneous operation prevention device is provided in order to prevent the vehicle from suddenly starting suddenly. Is attached. 1) Shift lock: The shift operation from the P (parking) position to the general range, such as the D (drive) position, is not possible unless the brake pedal is pressed when starting. 2) Key interlock: The key of the key type ignition switch cannot be removed unless the shift lever is in the P position. Further, the shift lever cannot be operated while parked at the P position.

As this shift lock mechanism, conventionally,
The key interlock and shift lock are turned on and off by operating the brake pedal, and the P that detects that the shift lever is set to the P position
Position switch, ignition switch, microcomputer, electromagnetic solenoid (electromagnetic actuator),
An electronically controlled type, which is performed by a control device including a relay, and a mechanical type, in which a key interlock is performed by a lockup cable and a shift lock is controlled by an electromagnetic solenoid, are in practical use.

The above electronically controlled type is excellent in wearability, but
Since a computer is required, there is a drawback that the cost is high. The mechanical type has a connection structure of a lockup cable terminal (key interlock) in one shift mechanism,
Since it is necessary to provide a connecting structure of an electromagnetic solenoid (shift lock) and the structure of the shift mechanism is complicated, it can be manufactured at low cost, but there is a disadvantage that the number of assembling steps is large.

[0005]

In order to improve the drawbacks of the above mechanical shift lock mechanism, US Pat. No. 4,887,702 proposes a shift lock mechanism in which an electromagnetic solenoid is provided in the middle of a lockup cable. . However, this shift lock mechanism has a structure in which the electromagnetic solenoid is continuously energized during operation, which causes a problem that the electromagnetic solenoid generates heat and durability is deteriorated. Further, there is a possibility that the shift lever enters the general range from the P position due to a child's mischief during parking and the vehicle may move on a slope or the like to cause an accident.

The object of the present invention is to improve the durability by minimizing the heat generation of the electromagnetic solenoid by the structure in which the electromagnetic solenoid can be energized to release the shift lock only for a short time when the shift operation is performed from the P position. Another object of the present invention is to provide a shift lock device for an automatic transmission for a vehicle, which is capable of reducing wear and tear and is shift-locked even during parking.

[0007]

SUMMARY OF THE INVENTION The present invention provides a key type ignition switch, a P position switch for detecting that the shift lever is set to the P position, a stop switch for detecting that the brake pedal is depressed, A shift lock device for an automatic transmission for a vehicle, comprising a parking lock member for fixing a shift lever to a P position, wherein a rotation position of an ignition switch is directly connected to the parking lock member and is in a tension state. At this time, a lock-up cable that fixes the shift lever to the P position by the parking lock member, and an electromagnetic solenoid with a solenoid spring that is interposed in the middle of the lock-up cable and tensions the lock-up cable by the spring force of a solenoid spring. Power the electromagnetic solenoid to the power source. And a power supply circuit for connecting,
The power supply circuit includes the ignition switch, the P
Only when all of the position switch and the stop switch are on, the electromagnetic solenoid is electrically connected to a power source to move the lockup cable by a stroke against the spring force of the solenoid spring, and the parking lock member shift lever is used. Is fixed to the P position to allow the shift lever to shift.

[0008]

According to the present invention, the shift lock can be released by energizing only when all of the ignition switch, the P position switch and the stop switch are turned on. Therefore, the energization time to the electromagnetic solenoid is short, and the electromagnetic solenoid is overheated due to Joule heat.
Deterioration can be prevented. As a result, the durability of the electromagnetic solenoid is improved and the power consumption is low, so that the power consumption of the battery or the like is small. In addition, since the shift lock is also performed during parking, it is possible to eliminate the inconvenience that the shift lever enters the general range from the P position due to child's mischief during parking and the vehicle moves on a slope or the like, which is highly safe.

[0009]

The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows a schematic configuration of a shift mechanism of an automatic transmission for a vehicle. The shift mechanism 100 includes a shift lever 1 and a bracket 2 for mounting the shift lever 1 on a vehicle body. As is well known, the shift lever 1 has a P (parking) position, an R (reverse) position, an N (neutral) position, a D (drive) position, a 2 (second) position,
It has a set position such as an L (low) position.

The bracket 2 is a plate-like member which is erected by being fastened to the vehicle body at its lower end, and has a detent plate 22 at its upper part and a lever bracket 23 at its lower part via a step 21. A void 24 is formed in the middle of the lever bracket 23 including the step 21. An arcuate punching 26 having a tooth profile 25 of the detent mechanism 200 is formed on the upper edge of the detent plate 22. In addition, in this embodiment, the bracket 2 is formed by integrally bending the detent plate 22 and the lever bracket 23 by bending the cross section into a hook shape. However, the detent plate and the lever bracket are formed separately, and each is formed. It may be fixed to the vehicle body.

An upper guide pin 27 is projectingly provided on a front part (left part in the drawing) of a left side surface (front surface in FIG. 1) of the detent plate 22, and a rear part of the lever bracket 23 is projected downward into the space 24. Guide pins 28 are provided. A substantially convex plate-like parking lock member (hereinafter referred to as a lock member) 3 is attached to the void 24 so as to be vertically displaceable.

The shift lever 1 includes a shaft 11 whose lower end is rotatably attached to an intermediate portion of a right side surface (a rear surface in FIG. 1) of a lever bracket 23, and the shaft 11.
And a grip 12 attached to the upper end of the. Handful 12
As shown in FIGS. 2 and 3, a push-in button 13 is mounted on the shaft 11, and a rod 14 is disposed inside the shaft 11. A locking pin 15 is provided at the lower end of the rod 14,
The locking pin 15 is inserted into the arcuate punching 26 of the detent plate 22 through a longitudinal slit (not shown) provided in the shaft 11 and engages with the tooth profile 25 for positioning during shift operation. The detent mechanism 200 of FIG.

The shift lock device 4 of the present invention includes the lock member 3 for fixing the shift lever 1 to the P position.
And a lock-up cable 6 having a front end (the left end in the figure) connected to the ignition switch 5 and a rear end connected to the lock member 3. The lock-up cable 6 is provided with a shift lock control device 40 for tensioning and releasing tension of the lock-up cable 6 for starting the engine and starting the vehicle.

The lock member 3 has a notch 31 that engages with the locking pin 15 and is horizontally provided on the upper portion of the lock member 3 so as to open rearward. A guide groove 32 that engages with the upper guide pin 27 is vertically formed on the front side of the notch 31. Wide lower part, lower guide pin 2 on the rear side
A guide groove 33 that engages with 8 is vertically formed, and an L-shaped guide groove 34 is provided on the front side portion.

A link arm 35 is rotatably attached to the front portion of the lever bracket 23. A link pin 36 is provided at the upper end of the link arm 35, and the link pin 36 is engaged with the L-shaped guide groove 34. At the lower end of the link arm 35, a lock member connector 6 connected to the rear end of the lockup cable 6
0 is engaged. With this configuration, the lock member 3
Is attached to the bracket 2 so as to be vertically movable in the space 24, and as shown in FIG. 3, the link arm 35 operates so as to rotate counterclockwise as the lock member 3 descends. Further, when the link arm 35 rotates clockwise, the L-shaped guide groove 34 functions as a cam, and the lock member 3 is biased upward.

In this shift mechanism 100, the link arm 35 is rotatable when the lock-up cable 6 is stroked and the shift lock is released.
As a result, the lock member 3 can be lowered. In this state, when the push button 13 is pushed in, the rod 14 is lowered and the lock member 3 is lowered. When the lock member 3 descends to the lower position shown in FIG. 3, the detent mechanism 200
In, the locking pin 15 deviates from the valley of the tooth profile 25 at the P position (the tooth valley at the left end in the drawing), and the shift lever 1 can be shifted to a position other than the P position.

That is, the driver shifts the shift lever 1 from the P position to the N (neutral) position to start the vehicle, and to the R position.
When shifting to a position other than the P position, such as the (reverse) position and the D (drive) position, the tension (shift lock) of the lockup cable 6 is released, and the grip 1
It is necessary that both the push-in buttons 13 of 2 are pushed in. Also, when the lock member 3 is located in the lower position and the lock-up cable 6 is strained,
The lock member connector 60 urges the lower end of the link arm 35 to the right in the drawing to raise the lock member 3.

As is well known, the key type ignition switch 5 has an OFF position and an ACC (accessory).
It has a position, an ON position, and a START position. It has a motion conversion mechanism 53 that converts the rotation of the key 51 (shown in FIG. 1) into the movement of the slide member 52 in the front-rear direction. The shift lock control device 40 includes an electromagnetic solenoid 7 as an electromagnetic actuator interposed in the middle of the lockup cable 6, and a power supply circuit 8 that connects the electromagnetic solenoid 7 to a power supply Vcc when a predetermined condition is satisfied (FIG. 1)) and.

The lockup cable 6 has a structure in which an inner cable 62 made of a wire is inserted in a pipe-shaped outer cable 61. In this embodiment, the outer cable 61 is a front side outer cable 63 that connects between the ignition switch 5 and the electromagnetic solenoid 7.
And a rear side outer cable 64 connecting the electromagnetic solenoid 7 and the lock member connecting tool 60. The rear outer cable 64 is fastened to the vehicle body by a fastener 67.

The inner cable 62 is connected to the electromagnetic solenoid 7
Is divided into two parts before and after, the front end is connected to the slide member 52, and the front side inner cable is biased to the front side by the key spring 54 (see FIGS. 4, 5 and 6) arranged on the slide member 52. 65 and the rear end of the lock member connecting tool 6
And a rear inner cable 66 connected to 0.

As shown in FIG. 5 or FIG. 6, the electromagnetic solenoid 7 includes a cylindrical housing 71 and the housing 71.
It has a bobbin 72 fitted therein and a coil 73 wound around the bobbin. In the bobbin 72, the movable iron core 7
4 is loosely fitted, and the movable iron core 74 is biased to the front side by a solenoid spring 75 provided. Movable iron core 7
The rear end of No. 4 is connected to the front end of the rear side inner cable 66 and is urged by the solenoid spring 75 in the front end direction (left direction in the drawing).

A cylinder 76 is provided at the tip of the movable iron core 74.
A piston 77 is fitted in the cylinder 76, and the rear end of the front side inner cable 65 is connected to the piston 77. The cylinder 76 and the piston 77 are arranged so that the ignition switch 5 is turned off from the ACC regardless of the setting position of the movable iron core 74.
The idle swing mechanism 70 is formed so as to be rotatable to the (accessory) and ON (on) positions.

The power supply circuit 8 is mounted on the ignition switch 5 of the engine as shown in FIG.
Ignition switch 5 and shift lever 1 that are turned on when the FF position is switched to the ACC position or the ON position
The shift mechanism includes a P position switch 82 for detecting that is set to the P position, a stop switch 83 that is turned on when the brake pedal B is depressed, and a relay 84. The power supply circuit 8 includes an ignition switch 5, a P position switch 82, and a stop switch 83.
When all are turned on, the relay 84 is turned on and the coil 7
3 is connected to the power supply Vcc.

Next, the operation of the shift lock device 4 will be described with reference to FIG.
It will be described together with the schematic diagram shown in FIG. In (a), the engine is stopped, the vehicle is parked, and the brake pedal B is stepped on. The ignition switch 5 is OFF, the stop switch 83 is ON, and the P position switch 82 is ON. The lock-up cable 6 is in a tension state due to the urging force of the solenoid spring 75, and the lock member 3
Is held at a higher position, the shift lever 1 is fixed at the P position.

(B) shows a state where the ignition switch 5 is turned to the ACC position from the state of (a). Although the key 51 can be operated by the action of the idling mechanism 70,
The shift lever 1 is fixed in the P position. (C)
The state in which the ignition switch 5 is turned on and the brake pedal B is released is shown. Missing mechanism 70
By this action, the key 51 can be operated and the engine is started, but the shift lever 1 cannot be shifted because the shift lever 1 is fixed at the P position.

(D) shows the state where the brake pedal B is depressed from the state of (c). Ignition switch 5,
All of the stop switch 83 and the P position switch 82 are O
I am N. At this time, the electromagnetic solenoid 7 is energized to attract the movable iron core 74, and the movable iron core 74 compresses the solenoid spring 75 and moves leftward in the drawing. As a result, the tension of the lock-up cable 6 is released, the link arm 35 can be rotated counterclockwise, and the lock member 3 can be lowered. Therefore, the operation of pushing the push-button 13 of the grip 12 pushes the shift lever 1 It is possible to shift from position.

(E) shows that the shift lever 1 is shifted to the D position or the like to start the vehicle, and the brake pedal B is released. At this time, the energization of the electromagnetic solenoid 7 is stopped, but the lock member 3 is kept in the lowered position, so that the shift lever 1 can be freely shifted.

(F) shows a state where the vehicle is stopped and the engine is stopped. Even in this state, the lock member 3 is kept in the lowered position, so that the shift lever 1 can be freely shifted. (G) shows the case where the shift lever 1 is further returned to the P position. At this time, the lock member 3 is lifted by the urging force of the solenoid spring 75 applied to the lockup cable, and the shift lever 1 is fixed to the P position.

As shown in FIG. 4A, the idling mechanism 70
May be composed of a cylinder 56 provided in the slide member 52 and a piston 57 fitted in the cylinder 56. With this configuration, since it is not necessary to divide the inner cable 62 into two, one inner cable can be adopted,
There is an advantage that the lock-up cable can be easily manufactured and assembled.

Although the shift mechanism 100 of the floor type automatic transmission has been described in the above embodiment, the shift lock mechanism of the present invention can be applied to the shift mechanism of the handle column type automatic transmission.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a shift mechanism and a shift lock device of an automatic transmission.

FIG. 2 is a perspective view of a shift mechanism.

FIG. 3 is a perspective view of a shift mechanism.

FIG. 4 is a plan view of a shift lock device with a key interlock.

FIG. 5 is a plan view of a shift lock device with a key interlock.

FIG. 6 is a schematic view showing an operating state of the shift lock device.

[Explanation of symbols]

 1 shift lever 3 parking lock member 4 shift lock device 5 ignition switch 6 lock-up cable 7 electromagnetic solenoid (electromagnetic actuator) 8 power circuit 52 slide member 56 cylinder 57 piston 62 inner cable 70 idling mechanism 74 movable iron core 75 solenoid spring 76 cylinder 77 Piston 82 P Position Switch 83 Stop Switch B Brake Pedal

Claims (4)

[Claims] 1. A key type ignition switch, a P position switch for detecting that the shift lever is set to the P position, a stop switch for detecting that the brake pedal is depressed, and a shift lever fixed to the P position. A shift lock device for an automatic transmission for a vehicle, comprising a parking lock member for operating the ignition switch, wherein the rotation position of the ignition switch is directly connected to the parking lock member, and the parking lock member shifts when in a tension state. A lock-up cable that fixes the lever to the P position, an electromagnetic solenoid with a solenoid spring that is interposed in the middle of the lock-up cable and that tensions the lock-up cable by the spring force of a solenoid spring, and that uses the electromagnetic solenoid as a power source. Power times to connect A power supply circuit, the power supply circuit, the ignition switch, the P
Only when all of the position switch and the stop switch are on, the electromagnetic solenoid is electrically connected to a power source to move the lockup cable by a stroke against the spring force of the solenoid spring, and the parking lock member shift lever is used. A shift lock device for an automatic transmission for a vehicle, wherein the shift lever is unlocked to the P position and the shift lever can be shifted. 2. The ignition switch according to claim 1, further comprising a piston connected to an inner cable of the lock-up cable and a cylinder accommodating the piston, wherein the ignition switch is in an OFF position when the lock-up cable is under tension. To ACC position or ON
A shift lock device for an automatic transmission for a vehicle, which is provided with an idling mechanism that allows rotation to a position. 3. The idle swing mechanism according to claim 2,
A shift lock device for an automatic transmission for a vehicle, wherein the shift lock device is provided in a movable iron core of the electromagnetic solenoid interposed in the inner cable of the lock-up cable. 4. The idle swing mechanism according to claim 2,
A shift lock device for an automatic transmission for a vehicle, wherein the shift lock device is provided in a slide member that is slid by rotation of the ignition switch.