JPH1016593A - Locking device of shift lever for automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a locking mechanism to reduce the load on a solenoid, miniaturize the solenoid, reduce the moving frequency of a plunger, and reduce the working noise. SOLUTION: A solenoid 33 is turned on when a lock-release condition is established to apply the energizing force in the same direction as the energizing direction of a coil spring 38. When a first lock piece 21 to move to a non-lock position L3 presses a slider 37 of the solenoid 33, the slider 37 is moved together with a housing 34 of the solenoid 33 in the separating direction from the waiting position P against the energizing force of a coil spring 40. Movement of the slider 37, the plunger 36 and the housing 34 in the separating direction from the waiting position P allows the movement of the first lock piece 21 to the non-lock position L3. As a result, the shift lever is released in a passage between the prescribed positions when the lock releasing condition is established, and the shift lever can be switched.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift lever locking device for an automatic transmission, and more particularly, to a shift lever having a reverse inhibit function of a shift lever for preventing the shift lever from accidentally entering a reverse position during traveling. The present invention relates to a lever locking device.

[0002]

2. Description of the Related Art Conventionally, a vehicle equipped with an automatic transmission (hereinafter referred to as an A / T vehicle) is provided with a floor-type shift lever, and the shift lever designates a shift position of the automatic transmission. . Fig. 7 shows the driver's seat of the A / T car.
Shown in

As shown in FIG. 7, a brake pedal 2 is provided in the driver's seat 1 of an A / T vehicle in front of the driver's seat 1. The driver's seat 1 is provided with a shift lever housing 3 at the front left of the driver's seat 1. A shift pattern hole 4 is formed in the shift lever housing 3, and a shift lever 5 is inserted through the shift pattern hole 4 so as to be swingable in the front-rear direction and the left-right direction.

As shown in FIG. 8, a plurality of steps are formed on the inner surface of the shift pattern hole 4, and when the shift lever 5 is moved, the shift lever 5 is moved right and left along the inner surface of the shift pattern hole 4. Move in the front-back direction while moving in the direction. In the shift pattern hole 4, a shift position corresponding to an automatic transmission (not shown) of the A / T vehicle is set at a predetermined position.

[0005] The shift position is provided with a parking position PP where the drive wheels are mechanically locked, a neutral position PN where the speed change element does not act, and a reverse position PR for moving the vehicle backward. The automatic transmission is a three-speed forward transmission, and its shift position is a drive position PD for performing forward automatic shifting of all transmissions, and fixed positions P1, P2, and P3 fixed to each of the three forward speeds. Is provided.
The function of the shift position can be selected by moving the shift lever 5 in the front-rear direction while swinging the shift lever 5 in the left-right direction and moving the shift lever 5 to each shift position. That is, the shift pattern hole 4 is a passage for the shift lever 5 to move to each shift position.

The operation of the shift lever 5 will be described. For example, when the shift lever 5 is moved out of the parking position PP, the shift lever 5 is first moved rightward until the shift lever 5 becomes a position where it can be moved backward. Next, the shift lever 5 is moved backward (downward in the figure) along the inner surface of the shift pattern hole 4 until the shift lever 5 comes into contact with the step portion 4a. Then, the shift lever 5 is moved to the left to make contact with the inner surface of the shift pattern hole 4. With this operation, the shift lever 5 is moved to the parking position P.
P can escape.

When the shift lever 5 is moved to the neutral position P
When the shift lever 5 is moved from the position N to the reverse position PR, the shift lever 5 is first moved rightward until the shift lever 5 can move forward. Next, the shift lever 5 is moved forward (upward in the figure) until it comes into contact with the step 4b. By this operation, the shift lever 5 can be moved from the neutral position PN to the reverse position PR.

Further, as shown in FIG. 8, an inhibit lock mechanism 10 is provided in the shift lever housing 3. The inhibit lock mechanism 10 includes the shift lever 5
Is inadvertently shifted from the neutral position PN to the reverse position PR.
To prevent entry. That is, if the shift lever 5 at any one of the drive position PD or the fixed positions P1, P2, and P3 enters the reverse position PR due to an erroneous operation while the A / T vehicle is traveling forward, a large shock occurs in the vehicle. . Therefore, the shift lever 5 cannot be moved to the reverse position PR unless conditions such as stopping of the vehicle are satisfied.

The structure of the inhibit lock mechanism 10 will be described. The inhibit lock mechanism 10 includes first and second lock pieces 11 and 12, a link 13, and a solenoid 14. First lock piece 11
Has one end pivotally mounted on the fixed shaft 15 and the other end disposed in the shift pattern hole 4. The second lock piece 12 is rotatably supported by a fixed shaft 16, one end of which is disposed in the shift pattern hole 4, and the other end of which is the link 1.
3 is connected to the first lock piece 11. Also,
The first lock piece 11 is rotatably mounted on a tip of a plunger 14 a of the solenoid 14.

The solenoid 14 is connected to a control circuit (not shown), and the control circuit controls the solenoid 14 to an excited state (ON) and a non-excited state (OFF) based on conditions such as stopping the vehicle. I have. And solenoid 1
4 is controlled to be off, the plunger 14a is protruded by the pressing spring 14b, and the first and second lock pieces 1 are
Reference numerals 1 and 12 are arranged in the shift pattern hole 4 and close the shift pattern hole 4, that is, the passage of the shift lever 5.

Then, the shift lever 5 at the parking position PP is engaged with the first lock piece 11, so that the left and right swing thereof is restricted. Therefore, the shift lever 5 cannot escape from the parking position PP. The shift lever 5 at the neutral position PN is in the second position.
And the rocking in the left-right direction is restricted. Therefore, the shift lever 5 is moved to the reverse position PR.
Can not be moved.

On the other hand, when the solenoid 14 is controlled to be turned on, the plunger 14a is retracted to retract the first and second lock pieces 11, 12 from the shift pattern hole 4. Then, the shift lever 5 at the parking position PP does not engage with the first lock piece 11, so that the shift lever 5 can escape from the parking position PP. Further, the shift lever 5 at the neutral position PN does not engage with the second lock piece 12, so that the reverse position PR
Can be moved to.

When the solenoid 14 is off, the shift lever 5 may be in the reverse position PR. At this time, the first lock piece 11 is moved forward by the shift lever 5 against the elastic force of the pressing spring 14b, and is further moved leftward to move to the parking position PP. Further, the second lock piece 12 can be moved rearward by the shift lever 5 against the elastic force of the pressing spring 14b, and further moved to the left to be moved to the neutral position PN.

[0014]

However, in the above-mentioned conventional lock device, the link system constituting the lock device is complicated, and the number of parts constituting the link system is large. Therefore, there is a problem that miniaturization is difficult and cost increases.

Also, since there are many link system components, there is a problem that when the link system is driven by a solenoid, the load on the solenoid increases. The solenoid 14 is turned on when the shift lever 5 is moved from the parking position PP or the neutral position PN to the reverse position PR, and the plunger 14a moves. On the other hand, from the reverse position PR to the parking position PP or the neutral position PN
The plunger 14a is also moved by the shift lever 5 when moving the plunger 14a. Therefore, the durability of the solenoid 14 has a problem that, in addition to the case where the plunger 14a moves by the on / off control, the case where the plunger 14a is forcibly moved by the shift lever 5 must be considered.

Further, when the plunger 14a is moved by controlling the on / off of the solenoid 14, the lock pieces 11, 12 and the link 13 also move in conjunction therewith.
There is a problem that the sound when operating the solenoid 14 is loud and annoying.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is possible to reduce the load on the solenoid by simplifying the lock mechanism, to reduce the size of the solenoid, and to reduce the frequency of movement of the plunger. An object of the present invention is to provide a lock device for a shift lever of an automatic transmission that can reduce the operation noise because the link mechanism or the like is not operated by the solenoid operation.

[0018]

In order to solve the above-mentioned problems, the invention according to claim 1 switches between a parking position PP and a reverse traveling position PR, a non-driving position PN, and a forward traveling PD. In the passage between the shift lever to be disposed and the predetermined position of the shift lever, a lock that opens when the unlock condition is satisfied and enables the shift lever to be switched, and locks when the unlock is not satisfied and disables the switch of the shift lever. A lock device for the shift lever of the automatic transmission, the lock device being located on a movement locus of the lock member from a lock position to a non-lock position and being movably pressed by the lock member. A first moving body which, when pressed by the member, allows the lock member to move to the unlocked position and is always held at the standby position by the first urging means; Serial together provided in the first moving body, in a state where the first moving body is positioned at the standby position,
A second movement which is arranged on the movement trajectory of the lock member to the unlock position and which is always held at the standby position by the second urging means having a smaller urging force than the first urging means. The lock member which is turned on when the lock release condition is satisfied and which applies an urging force in the same direction as the urging direction of the second urging means to move the second moving body to the unlock position. When pressed, the second moving body is moved together with the first moving body in a direction away from the standby position of the first moving body. When the unlock condition is not satisfied, the second moving body is turned off to eliminate its urging force, and When the lock member that moves to the unlock position with respect to the moving body presses, the first moving body
And a solenoid that permits relative movement of the movable member and prevents the lock member from moving to the unlocked position.

Further, in the invention of claim 2, the lock member opens and closes a passage between the parking position PP and the reverse travel position PR, and moves by the shift lever to move the shift lever for reverse travel. A first locking member movably disposed between a locked position and an unlocked position to enable movement from the position PR to the parking position PP, and a non-driving position P
A lock position and a non-lock position are provided to open and close the passage between N and the reverse travel position PR, and to move the shift lever in the front-rear direction to move from the reverse travel position PR to the non-drive position PN. And a second lock member movably arranged between the first position and the second position.

According to the first aspect of the present invention, the solenoid is turned on when the lock release condition is satisfied, and applies an urging force in the same direction as the urging direction of the second urging means. As a result, when the lock member that moves to the unlock position is pressed against the second moving body, the second moving body is separated from the standby position together with the first moving body against the urging force of the first urging means. In the direction you want. The movement of the second moving body and the first moving body in the direction away from the standby position allows the lock member to move to the unlocked position. As a result, in the passage between the predetermined positions of the shift lever, it is opened when the lock release condition is satisfied, and the shift lever can be switched.

Conversely, when the unlock condition is not satisfied, the solenoid is turned off to eliminate its urging force.
As a result, when the lock member that moves to the unlock position with respect to the second moving body presses, the second moving body moves relative to the first moving body against the second urging means. . As a result, the movement of the lock member to the unlocked position is prevented.

According to the second aspect of the present invention, when the first lock member opens and closes the passage between the parking position PP and the reverse travel position PR, when the lock condition is satisfied and when the lock condition is not satisfied, The operation of claim 1 is performed. Further, when the second lock member opens and closes the passage between the non-drive position PN and the reverse travel position PR, the above-described operation is performed when the lock condition is satisfied and when the lock condition is not satisfied.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. In the present embodiment, the same components as those in FIGS. 7 and 8 are denoted by the same reference numerals, and detailed description is omitted. The operation of moving the shift lever 5 to each shift position is the same as the conventional operation. Therefore, the description is omitted. Note that PD is a drive position as a forward traveling position.

As shown in FIG. 1, an inhibit lock mechanism 20 is provided near the shift pattern hole 4. The inhibit lock mechanism 20 is provided with a first lock piece 21 formed in a crank shape. The first lock piece 21 constitutes a lock member and a first lock member.

The first lock piece 21 is slidably supported by the shift lever housing 3 in the left-right direction in FIG. First lock piece 2
The front end of 1 extends to the parking position PP side of the shift pattern hole 4 as a parking position, and a recess 22 is formed in the extended portion 23 so that the shift lever 5 can be engaged.

When the first lock piece 21 is pressed against the stopper 29 provided on the shift lever housing 3, it blocks the passage between the parking position PP and the reverse position PR as the reverse traveling position. At this time, the first
The recess 22 of the lock piece 21 is located above the parking position PP, and the shift lever 5 is in the recess 22. The position when the first lock piece 21 is pressed against the stopper 29 provided on the shift lever housing 3 is referred to as a first lock position L1 in the lock area of the first lock piece 21.

At this time, the shift lever 5 in the concave portion 22 is located at the parking position PP when the first lock piece 21 is located at the locked position. Note that in this embodiment, the lock area is defined by a right side or a right end of the first lock piece 21 and a third lock piece 24 described later in the first lock position L1 in FIG.
And the second lock position L2, and the L3 position closer to the right than the second lock position L2 is a non-lock position.

When the shift lever 5 at the parking position PP is swung rightward, the first lock piece 21 slides rightward based on the swing. The first lock piece 21 is in the unlocked position L shown in FIG.
3, the reverse position PR and the parking position P
The passage between the shift lever P and the shift lever P is opened, so that the shift lever 5 located in the recess 21 can swing toward the reverse position PR.

Below the rear end of the first lock piece 21, a third lock piece 24 is provided. Third
The lock piece 24 is slidably supported only in the left and right directions in FIG. As shown in FIG.
Is provided with a stopper 30 for restricting the movement of the third lock piece 24 to the left. The contact position of the third lock piece 24 with this stopper 30 is the third position.
Is referred to as a first lock position L1 of the lock piece 24 of FIG.

A locking projection 25 is provided on the rear side of the third lock piece 24, and one end of a coil spring 26 as a tension spring is hooked to the locking projection 25. The other end of the coil spring 26 is hooked on the shift lever housing 3 so that the coil spring 26 holds the third lock piece 24 at the first lock position L1.

On the left end of the third lock piece 24, a second lock piece 27 is rotatably supported by a shaft 28. One end of a coil spring 31, which is a pressing spring, is hooked on the rear side of the second lock piece 27,
The other end of the coil spring 31 is hooked on the shift lever housing 3.

The third lock piece 24 and the second lock piece 27 constitute a lock member and a second lock member. The shift lever housing 3 includes the second lock piece 2.
A stopper 32 is provided for regulating the clockwise rotation of 7. The second lock piece 27 is always pressed against the stopper 32 by the urging force of the coil spring 31. The third lock piece 24 is pressed against the stopper 30, and the second lock piece 27 is pressed against the stopper 32. The third lock piece 24 is disposed in the shift pattern hole 4 so as to be in the neutral position as the non-drive position. The passage between the position PN and the reverse position PR is closed.

At this time, the second lock piece 27 engages with the shift lever 5 at the neutral position PN. When the shift lever 5 at the neutral position PN swings in the left-right direction, the second lock piece 27 and the third lock piece 21 slide in the left-right direction integrally based on the swing. (See FIG. 5).

The second lock piece 27 can be engaged with the shift lever 5 at the reverse position PR, so that the shift lever 5 at the reverse position PR can be moved backward.
That is, when the second lock piece 27 moves toward the neutral position PN, the second lock piece 27 moves against the coil spring 31 based on the movement (see FIG. 5).

The inhibit lock mechanism 20 has a solenoid 33. Housing 3 of solenoid 33
The guide 4 is vertically movable with respect to the shift lever housing 3. The housing 34 constitutes a first moving body.

At the lower end of the housing 34, one end of a coil spring 40 which is a pressing spring as a first urging means is engaged. The other end of the coil spring 40 is hooked on the shift lever housing 3, and the solenoid 33 is constantly urged upward by the coil spring 40. The biasing force of the coil spring 40 is f2.
The housing 34 is provided with a stopper 4 provided on the shift lever housing 3 by the bias of the coil spring 40.
3 is always located at the position where it is locked. This position is referred to as a standby position P in the first moving body (see FIGS. 1 and 2).
reference).

A housing 34 of the solenoid 33 is provided with a coil 35 and a plunger 36 which is attracted upward by excitation of the coil 35. The attraction force to the plunger 36 due to the excitation of the coil 35 is f3. A lower end of the plunger 36 is engaged with one end of a coil spring 38 which is a pressing spring as a second urging means. The other end of the coil spring 38 is hooked on the housing 34 to urge the plunger 36 upward. This urging force is defined as f1.

The relationship between the urging forces f1, f2 of the coil springs 38, 40 and the attraction force f3 of the coil 35 is as follows. f1 <f2 f1 + f3> f2 That is, the urging force f1 of the coil spring 38 is smaller than the urging force f2 of the coil spring 40, and the urging force f1 of the coil spring 38 and the attraction force f3 of the coil 35.
Is greater than the urging force f2 of the coil spring 40.

At the tip of the plunger 36, a slider 37 is fixed. The upper surface of the slider 37 is a contact surface 39 formed of a slanted flat surface and opposes the first and third lock pieces 21 and 24. The slider 37
By locking with a stopper (not shown) provided on the housing 34, the upward movement of the slider 37 is restricted so that the upper end edge of the slider 37 is positioned flush with the upper end surface of the housing 34. (See FIG. 2). This position is the standby position of the slider 37. The plunger 36 and the slider 37 constitute a second moving body.

The solenoid 33 is connected to the housing 34
Or at least one of the contact surfaces 39 of the slider 37 is provided with the first and third lock pieces 21 and 24.
To be engaged with the lower surface of the.

That is, when the solenoid 33 is in the excited state,
When the first lock piece 21 and the third lock piece 24 are located at the P position and the first lock piece 21 and the third lock piece 24 are located at the first lock position L1, as shown in FIG. The slider 37 is engaged with the contact surface 39.

When the solenoid 33 is in the excited state,
The first lock piece 21 or the third lock piece 2
4A is located at the unlocked position L3, FIG.
Or, as shown in FIG.
Alternatively, a solenoid 33 is provided on the lower surface of the third lock piece 24.
Of the housing 34 are engaged with each other.

When the solenoid 33 is in the demagnetized state and the first
Is located at the second lock position L2,
And the third lock piece 24 is in the first lock position L1.
6A, the slider 37 is pressed downward by the first lock piece 21 as shown in FIG. 6A, and in this state, the slider 37 is pressed by the lower surface of the first lock piece 21.
Are engaged with each other. Then, at this time, the first lock piece 21 abuts on the upper side surface of the housing 34 of the solenoid 33, and the movement from the second lock position L2 to the unlock position L3 is prevented.

The solenoid 33 is in a demagnetized state, and
The first lock piece 21 is located at the unlocked position L3,
When the third lock piece is located at the second lock position L2, the slider 37 is pressed downward by the third lock piece 24 as shown in FIG. The upper edge of the slider 37 is engaged with the lower surface of the lock piece 24. At this time, the third lock piece 24 comes into contact with the upper side surface of the housing 34 of the solenoid 33, and the second lock position L
2 to the unlocked position L3 is prevented.

As shown in FIG. 1, a parking switch 41 and a neutral switch 42 are provided near the shift pattern hole 4. Parking switch 41
Is provided at a position where it is engaged with the shift lever 5 at the parking position PP, and is turned on (closed) in the engaged state. Neutral switch 42 is in neutral position P
N is provided at a position where the shift lever 5 is engaged with the shift lever 5 and is turned on (closed) in the engaged state. Next, the electrical configuration of the shift lever locking device of the automatic transmission will be described.

As shown in FIG. 3, an ignition switch 46 is connected to the control circuit 45. The ignition switch 46 is provided in a key cylinder (not shown) of the driver's seat 1. A key lock solenoid 47 is provided in the key cylinder, and the key lock solenoid 47 is connected to the control circuit 45. When the key lock solenoid 47 is energized, a plunger (not shown) protrudes, and the plunger prevents the ignition key from rotating from a predetermined position, thereby preventing the ignition key from being pulled out.

A battery E is mounted on the A / T vehicle, and a contact on one end of an ignition switch 46 is connected to the battery E. The ignition switch 46 is provided with an accessory contact ACC and an ignition contact IG, and is appropriately connected to the accessory contact ACC and the ignition contact IG based on a rotation operation amount of an ignition key (not shown). Both contacts ACC and IG are connected to a control circuit 45, and the voltage of the battery E is used as an accessory power supply and an ignition power supply, respectively.
Supplied to Then, the control circuit 45 is driven based on the supplied power of the battery E.

The parking switch 41 is connected to the control circuit 45. The control circuit 45 inputs the ON of the parking switch 41 and detects that the shift lever 5 is at the parking position PP. Also,
The neutral switch 42 is connected to the control circuit 45. The control circuit 45 includes the neutral switch 42
Is turned on, and the shift lever 5 is moved to the neutral position P.
N is detected. Control circuit 45
The on / off control of the solenoid 33 is performed based on the detected position of the shift lever 5.

A vehicle speed sensor 48 is connected to the control circuit 45, and detects the vehicle speed when the A / T vehicle is running forward based on the state of the vehicle speed sensor 48. And
When the speed of the A / T vehicle is equal to or higher than a predetermined vehicle speed (10 km / h in this embodiment), the solenoid 33 is turned off to prevent the shift lever 5 from entering the reverse position PR.

A brake switch 49 is connected to the control circuit 45, and the depression of the brake pedal 2 is detected by the brake switch 49. The control circuit 45 controls the on / off of the solenoid 33 based on the detected depression of the brake pedal 2.

That is, the control circuit 45 controls the solenoid 33 to be turned on (excited) and turned off (demagnetized) according to conditions based on the states of the parking switch 41, the neutral switch 42, the brake switch 49, and the vehicle speed sensor 48. . Then, the solenoid 33 is turned on.
By turning off, the slider 37 is held at the standby position or cannot be held. When the slider 37 is held at the standby position, the first and third lock pieces 21 and 24 are allowed to move only in the range of the lock region, but move rightward from the second lock position L2 to the unlock position L3. Movement is restricted. As a result, the movement of the shift lever 5 is restricted.

Next, the operation of the shift lever locking device according to the present embodiment having the above-described configuration will be described. When the driver rotates the ignition key to connect the ignition switch 46 to the accessory contact ACC, the voltage of the battery E is supplied to the control circuit 45 via the accessory contact ACC.
Is applied to Then, the control circuit 45 includes the parking switch 41, the neutral switch 42, the vehicle speed sensor 48
And the state of the brake switch 49, and controls the drive of the solenoid 33 based on the state.

That is, the control circuit 45 controls the solenoid 33 to be off when the parking switch 41 is on, that is, when the shift lever 5 is at the parking position PP. Then, the plunger 36 holds the slider 37 at the standby position only by the urging force f1 of the coil spring 38.

Therefore, when the shift lever 5 is swung to the right in this state, the first lock piece 21 resists the urging force of the coil spring 38 and the slider 33 of the solenoid 33 as shown in FIG. 37 is depressed and moved downward.
At this time, since the urging force f2 of the coil spring 40 urging the housing 34 of the solenoid 33 upward is larger than the urging force f1 of the coil spring 38, the solenoid 33 itself does not move downward. The first lock piece 21 is moved to the second position by the downward movement of the slider 37.
After that, the lock position L2 is reached, but thereafter, the first lock piece 21 abuts on the upper side surface of the housing 34 of the solenoid 33 and cannot move. Therefore, the shift lever 5
Is restricted from swinging rightward and cannot escape from the parking position PP.

Next, the driver turns the ignition key to turn the ignition switch 41 to the ignition contact I.
When connected to G, the voltage of the battery E is applied to the control circuit 45 via the ignition contact IG.

First, the case where there is a vehicle speed, that is, the case where the A / T vehicle is traveling forward will be described. At this time, the shift lever 5 moves from the neutral position PN to the fixed position P1,
It is located at either P2 or P3. The control circuit 45 detects the vehicle speed by the vehicle speed sensor 48 and controls the solenoid 33 to be turned off. When the solenoid 33 is turned off, the plunger 36 holds the slider 37 at the standby position only by the urging force f1 of the coil spring 38.

Therefore, in this state, the neutral position PN
6B, the third lock piece 24 presses the slider 37 of the solenoid 33 downward against the urging force of the coil spring 38 as shown in FIG. 6B. Move. At this time, since the urging force f2 of the coil spring 40 urging the housing 34 of the solenoid 33 upward is larger than the urging force f1 of the coil spring 38, the solenoid 33 itself does not move downward. Then, the third lock piece 24 reaches the second lock position L2 by the downward movement of the slider 37, but thereafter, the third lock piece 21 moves by contacting the upper side surface of the housing 34 of the solenoid 33. Can not. Therefore, the rightward swing of the shift lever 5 is limited, and the shift lever 5 is shifted from the neutral position PN to the reverse position PR.
Can not be moved.

As a result, it is possible to prevent the shift lever 5 from inadvertently moving to the reverse position PR during traveling. Next, when there is no vehicle speed, that is, when the A / T vehicle is stopped and the brake pedal 2 is depressed and the brake switch 49 is turned on, the control circuit 45 sets the state of the parking switch 41 and the neutral switch 42 to the state. Regardless, the solenoid 33 is turned on. When the solenoid 33 is turned on, the plunger 36 is attracted by the coil 35, so that the slider 37 is held at the standby position by a force obtained by adding the attraction force f3 of the coil 35 to the urging force f1 of the coil spring 38. The combined force (holding force: f1 + f3) is applied to the coil spring 4
It becomes larger than the urging force f2 of 0.

Therefore, in this state, the shift lever 5 located at the parking position PP or the neutral position PN
When the shift lever 5 located at the position shown in FIG.
As shown in FIG. 4A or 4B, the first lock piece 21 or the third lock piece 24 presses the slider 37 downward, but the holding force (f1 + f3) of the slider 37 is larger than the solenoid 33. Is larger than the urging force f3 of the coil spring 40 of the housing 34 of the
And the solenoid 33 are pressed integrally.
Accordingly, the housing 34 of the solenoid 33 moves downward against the urging force of the coil spring 40.

Therefore, when the shift lever 5 is at the parking position PP or the neutral position PN, the shift lever 5 can swing rightward.
Can be moved to any shift position between.

On the other hand, when the A / T vehicle is stopped and the brake switch 44 is off, that is, when the brake pedal 2 is not depressed, the shift lever 5 is moved to the parking position P.
When it is at P, the parking switch 41 is turned on by the shift lever 5. The control circuit 45 inputs the ON of the parking switch 41 and controls the solenoid 33 to be OFF. When the solenoid 33 is turned off, the above-described FIG.
As shown in (a), the rightward movement of the first lock piece 21 is restricted. Therefore, since the swing of the shift lever 5 is restricted, the shift lever 5 cannot escape from the parking position PP.

When the shift lever 5 is in the neutral position PN when the A / T vehicle is stopped and the brake switch 44 is off, the neutral switch 39 is turned on by the shift lever 5. Become. Then, the control circuit 45 sets the neutral switch 4
2 is turned on, and the solenoid 33 is turned off.
When the solenoid 33 is turned off, the slider 37 is allowed to move downward from the standby position as shown in FIG. 6B, so that the solenoid 33 itself does not move downward.
Then, the third lock piece 24 reaches the second lock position L2 by the downward movement of the slider 37, but thereafter, the third lock piece 21 moves by contacting the upper side surface of the housing 34 of the solenoid 33. Can not. Therefore, the rightward swing of the shift lever 5 is limited, and the shift lever 5 cannot be moved from the neutral position PN to the reverse position PR.

1) As described in detail above, in the present embodiment, the inhibit lock mechanism 20 for restricting the movement of the shift lever 5 is separated into the first lock piece 21 and the second lock piece 24. And the solenoid 33
Is excited to allow the solenoid 33 itself to move from the standby position P, thereby allowing the lock pieces 21 and 22 to move from the lock region to the unlock position, and release the lock. In addition, by demagnetizing the solenoid 33, the solenoid itself prevents the lock pieces 21 and 24 from moving to the unlocked position and stays in the lock area.

As a result, the solenoid 32 is connected to the plunger 3
6 and only the suction force for holding the slider 37 is required, and there is no need to drive other members.
3, the load can be reduced, and stable operation can be achieved.

2) Inhibit mechanism 2 of the present embodiment
No. 0 employs a structure in which the first and second lock pieces 21 and 24 are slid without using a link mechanism. As a result, the number of parts is reduced, and the number of assembling steps can be reduced, so that the cost can be reduced.

3) Further, when the solenoid 33 is turned off (demagnetized) at the time of locking, when the slider 37 and the plunger 36 receive an external force from both the lock pieces 21 and 24, the solenoid 33 receives the pressing force of the coil spring 38. In opposition, both members 37, 38 need only move downward. Further, when the solenoid 33 is unlocked, even if the solenoid 33 receives an external force from the lock pieces 21 and 24, the solenoid 3
3 moves downward by the housing 33 being pressed against the urging force of the coil spring 40.

Therefore, stress on the solenoid 33 can be reduced, and durability can be improved. 4) Further, even when the solenoid 33 is driven, the plunger 36 is held at the standby position by the coil spring 38 in advance, and the plunger 36 and the slider 37 are moved.
Since only the holding force located at the standby position is increased, the sound generated when the solenoid 332 operates can be eliminated.

The present invention is not limited to the above embodiment, but may be implemented as follows. (A) In the above embodiment, the coil springs constituting the various biasing means are constituted by the push springs or the extension springs, but the push springs are also constituted by the extension springs or the extension springs are constituted by the extension springs. You may change to a spring.

(B) In the above embodiment, the control circuit 45
Although the solenoid 33 and the key lock solenoid 47 are provided in the first embodiment, only the solenoid 33 may be provided. (C) In the present embodiment, the control circuit 45 includes the parking switch 41, the neutral switch 42, and the vehicle speed sensor 4.
Although the on / off control of the solenoid 33 is performed based on the states of the brake switch 8 and the brake switch 49, the combination may be appropriately changed and executed.

(D) In the above embodiment, when the vehicle speed is 10 km / h or more, the solenoid 33
Is turned off to limit the movement of the shift lever 5,
The vehicle speed may be changed to an appropriate value, and when the speed is equal to or higher than the value, the solenoid 33 may be turned off to limit the movement of the shift lever 5.

(E) In this embodiment, a three-speed automatic transmission is used, a drive position PD for performing automatic forward shift of all transmissions, and a fixed position P1, which is fixed to each of three forward speeds.
Although P2 and P3 are set, they may be set arbitrarily, such as set at the drive position PD and the fixed positions P1 and P2. Further, the present invention may be implemented by using an automatic transmission capable of performing two-step shifting or four or more-step shifting.

(F) In the present embodiment, the lock piece is common to the first and third lock pieces, but a solenoid 33 may be provided exclusively for each. Further, the present invention is not limited to the shape of the shift pattern hole 4 according to the present embodiment, and the shape may be appropriately changed to, for example, a mirror-reversed shape in the left-right direction. (G) In the present embodiment, the neutral switch 42 that is engaged when the shift lever 5 is in the neutral position PN is provided to detect that the shift lever 5 is in the neutral position PN. May be provided with a neutral detection sensor for detecting that the speed change element does not act, and the shift lever 5 may be detected to be in the neutral position PN based on the detection result of the neutral detection sensor.

Among the technical ideas grasped from the above embodiment, the technical ideas other than the claims are described below together with the effects. (1) In claim 1 or claim 2, the third biasing means is a coil constituting one solenoid. According to this configuration, the function of claim 1 or claim 2 can be realized by a single solenoid coil.

[0074]

As described above, according to the first aspect of the present invention, the load on the solenoid can be reduced by simplifying the lock mechanism. Further, since the solenoid only applies an urging force to the second operating body and does not move the second operating body, the solenoid can be made a small solenoid, and the frequency of movement of the plunger can be reduced. Since the link mechanism is not activated,
An excellent effect that can reduce the operation noise is achieved.

According to the second aspect, the effect of the first aspect can be achieved in each of the two lock members.

[Brief description of the drawings]

FIG. 1 is a plan view of a shift lever locking device according to an embodiment of the present invention.

FIG. 2 is a side view of a lock mechanism.

FIG. 3 is a block circuit diagram of a control circuit of a shift lever locking device.

FIG. 4A is a side view of a lock device in a state where a first lock piece is operated when a solenoid is turned on,
(B) is a side view of the lock device in a state where the second lock piece is operated when the solenoid is turned on.

FIG. 5 is a plan view of a lock mechanism.

FIG. 6A is a side view of the lock device in a state where the first lock piece is operated when the solenoid is off, and FIG.
FIG. 5 is a side view of the lock device in a state where the second lock piece is operated when the solenoid is off.

FIG. 7 is a schematic view showing a sudden driving of the A / T vehicle.

FIG. 8 is a plan view showing a conventional inhibit lock mechanism for a shift lever.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Driver seat, 2 ... Brake pedal, 3 ... Shift lever housing, 4 ... Shift pattern hole, 5 ... Shift lever,
21. Lock member and first lock member constituting first lock member
Lock piece, 24... A third lock piece constituting a lock member, 26... A coil spring, 27... A second lock piece constituting a second lock member together with the third lock piece. , 31 ...
Coil spring, 33 ... solenoid, 34 ... housing, 35 ... coil, 36 ... plunger, 37 ... slider, 38 ... coil spring as second urging means,
39: contact surface, 40: coil spring as first biasing means, 41: parking switch, 42: neutral switch, 45: control circuit, 46: ignition switch, 48: company sensor, 49: brake switch.

Claims (2)

[Claims] 1. A parking position (PP), a reverse traveling position (PR), a non-driving position (PN), and a forward traveling (PD).
When the unlock condition is satisfied, the shift lever (5) is opened in the passage between the shift lever (5) that is switched between the shift lever (5) and the predetermined position of the shift lever (5), and the shift lever (5) can be switched. If not established, the lock members (21, 21) that close to disable switching of the shift lever (5).
And a lock device for a shift lever of an automatic transmission, comprising: a lock member (21, 24, 27) that is located on a movement path from a lock position to a non-lock position of the lock member (21, 24, 27); 21, 24, 27) so that the lock members (21, 24, 27) can move to the unlocked position when pressed by the lock members (21, 24, 27). The first moving body (34), which is always held at the standby position by the first urging means (40), and the first moving body (34) is provided on the first moving body (34).
When the moving member (34) is located at the standby position, the moving member (34) is disposed on the movement locus of the lock member to the unlock position, and has a smaller urging force than the first urging means (40). The second urging means (38) is turned on when the lock release condition is satisfied with the second moving body (36, 37) which is always held at the standby position, and the second urging means (38) By applying a biasing force in the same direction as the biasing direction of the second moving body (36, 37), when the lock member (21, 24, 27) that moves to the unlocked position is pressed against the second moving body (36, 37), The moving body (36, 37) is connected to the first moving body (3
4) is moved in a direction away from the standby position of the first moving body (34), and when the lock release condition is not satisfied, the first moving body (34) is turned off to eliminate its urging force, and the second moving body (36,
Lock member (2) that moves to the unlock position with respect to (37).
1, 2, 27), the second mobile unit (3
And a solenoid (33) for allowing relative movement of the first and second moving bodies (34, 34) with respect to the first moving body (34) and preventing the lock members (21, 24, 27) from moving to the unlocked position. Locking device for shift lever of transmission. 2. The lock member opens and closes a passage between a parking position (PP) and a reverse traveling position (PR), and is moved by the shift lever (5) to move the shift lever (5). A first lock member (21) movably disposed between a locked position and an unlocked position to enable movement from the reverse traveling position (PR) to the parking position (PP); Opening and closing the passage between (PN) and the reverse travel position (PR), the shift lever (5) moves the vehicle forward and backward to move from the reverse travel position (PR) to the non-drive position (PN). 2. A shift lever lock for an automatic transmission according to claim 1, further comprising a second lock member (27, 24) movably disposed between a locked position and a non-locked position to allow the movement of the shift lever. apparatus.