JPH0255666B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a shift operation device for an automatic transmission that prevents a shift operation from a stop position to a running position unless a brake is applied when starting an automobile.

BACKGROUND OF THE INVENTION Conventionally, as a shift operation device for an automatic transmission mounted on an automobile, a structure shown in FIG. 5 has been put into practical use. That is, a detent plate 10 is provided upright on the vehicle floor, and the detent plate 10 has R (reverse) and D (drive)
A guide groove 11 is formed in which running positions such as P (parking lock) and stop positions such as N (neutral) are set. A shift lever 13 is pivotally supported on one side of the detent plate 10 by a pivot shaft 12, and the shift lever 13 is moved downward by pressing a select button (not shown). At the same time, a detent pin 14 is provided which is biased upward and comes into contact with the guide groove 11. A lock lever 15 is disposed on the other side of the detent plate 10 and is pivotally supported by a pivot shaft 12 together with the shift lever 13.
An engaging recess 16 is formed in the free end of the holder.
This lock lever 15 receives the detent pin 14 located at the P position in the engagement recess 16, and is at the lock position L (shown by the chain line) which prevents rotation of the shift lever 13, and when it is pulled by the return spring 17 and is pulled into the detent pin 14. It is configured to be freely rotatable to an unlock position U (shown in solid line) away from the tent pin 14. The lock lever 15 is in contact with the tip of a plunger 19 provided on an electromagnetic actuator 18 that can move forward and backward, and the electromagnetic actuator 18 is provided with an ignition switch, a P position detection switch, and a stop lamp switch. A control circuit (not shown) is associated. In this structure, when the shift lever 13 is in the P position with the ignition switch turned on, the P position detection switch is turned on and the electromagnetic actuator 18 is turned on.
is activated by excitation. Therefore, the plunger 19 projects and drives the lock lever 15 to the lock position L, and the detent pin 14 is prevented from moving from the P position to any other position.

Next, when the brake pedal is depressed and the stop lamp switch is turned on, the electromagnetic actuator 18 is demagnetized, the plunger 19 is retracted, and the lock lever 15 is rotated to the unlock position U.
This allows the detent pin 14 to move from the P position to other travel positions,
By making it impossible to shift to the driving position unless the brakes are controlled in this way, the driver can learn the brake position and prevent erroneous operation.

Problems to be Solved by the Invention However, in such a conventional structure,
In order to restrain the detent pin 14 in the P position, the detent pin 14 must be moved downward as the select button is pressed, and the shift lever 13 must then be moved from the P position to the R position. It is also necessary to prevent the detent pin 14 from moving laterally when the rotation operation is performed. Therefore, the engagement recess 16 formed in the lock lever 15 is connected to the detent pin 14.
In this way, the engagement recess 16 is required to have the function of preventing not only the downward movement of the detent pin 14 but also the lateral movement of the detent pin 14. In order to have a function that can prevent this, the shape becomes complicated.

Furthermore, if the lock lever 15 at the end of the detent pin 14 prevents the movement of the detent pin 14 in each of the above-mentioned directions, on the other hand, when the detent pin 14 is moved, the movement of the detent pin 14 is prevented. Bending stress occurs in the shear direction. Therefore, the detent pin 14 has a large diameter,
Alternatively, it is necessary to take measures to resist the bending stress, such as molding with a highly rigid material, resulting in disadvantages in terms of weight and cost.

Furthermore, the detent pin 14 is connected to the shift lever 1.
In order to more reliably position the shift lever 13, the pivot shaft 12 is located a predetermined distance l (approximately 50 mm) away from the pivot shaft 12, which is the pivot point of the shift lever 13. The lock lever 15, which is pivotally supported by the detent pin 12 and restrains the detent pin 14, has a length of at least l. Therefore, it is necessary to secure a space on the side of the detent plate 10 for arranging the elongated locking lever 15 and a space necessary for the locking lever 15 to rotate between the locking position L and the unlocking position U. First, it also has the disadvantage that the entire device becomes larger.

The present invention has been made in view of these conventional problems, and is an automatic automatic that solves the above problems by restraining the shift lever in the stop position without blocking the movement of the detent pin. The present invention provides a gear shift operation device for a transmission.

Means for Solving the Problems In order to solve the above problems, the present invention provides stop positions such as P (parking), N (neutral), R (reverse), D (drive), etc.
A daytent plate set with driving positions such as 2 (second) and 1 (first) is erected and fixed on the vehicle body, and on the side of the daytent plate,
A rotatable shift lever is pivotally supported at each of the positions, and a compression rod is inserted into the shift lever to be biased upwardly and to move downwardly when pressed. In the structure in which a detent pin is provided on the shift lever, the detent pin is positioned at each position in accordance with the rotational operation of the shift lever, and is released from each position as the compression rod is moved downward. An annular locking member having a stopper protrusion on the circumferential surface is fitted onto the rotation support shaft, and the locking member positions the stopper protrusion opposite to the lower end surface of the compression rod. The lock member is configured to be rotatable between a lock position that prevents the compression rod from moving downwards and an unlock position that allows the compression rod to move downwardly when separated from the lower end surface. Driving means is provided which rotates to the lock position based on a rotation operation to the stop position and to the unlock position based on a brake operation.

Operation In the above configuration, when the shift lever is rotated to the P position, the driving means rotates the locking member to the locking position, thereby causing the stopper protrusion to move below the compression rod. Located opposite the end face, it prevents the compression rod from moving downward. Therefore, the detent pin cannot be released from the P position, and as a result, the shift lever is constrained to the P position. At this time, since the stopper protrusion merely prevents the compression rod from moving downward, it is sufficient that the stopper protrusion has the function of preventing only one-dimensional movement of the compression rod. The shape will be simple. Furthermore, the locking member does not directly prevent the movement of the detent pin, but prevents the compression rod from moving downward, that is, from moving in the axial direction. No bending stress occurs in the curve. Moreover, since the locking member is fitted onto the rotation support shaft and prevents the movement of the compression rod at its lower end surface, the locking member is fitted to the rotation support shaft and prevents movement of the compression rod at the lower end surface of the locking member. Therefore, the space around the pivot shaft can be effectively utilized to arrange the lock member and the like.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIGS. 1 and 2, a base plate 21 is attached to the vehicle body 20, and a detent plate 22 is erected and fixed to the base plate 21. An opening 23 is formed in the detent plate 22, and a guide groove 24 is formed at the upper edge of the opening 23. The guide groove 24 has stop positions P, N, and traveling positions R, D, 2,
1, and a recess 25 is formed in the P position, and a protrusion 26 is formed between the P and R positions. Further, the side edge of the detent plate 22 is provided with a bent piece 27 as shown in FIG.
A contactor 28 is provided on the bent piece 27.
A park switch 29 is installed. Furthermore, a pivot shaft 30 is rotatably inserted into the lower center of the detent plate 22.
A pair of opposing legs 32, 32 provided at the lower end of the shift lever 31 are fixed to the pivot shaft 30, and slide holes 33, 33 are provided in the legs 32, 32 in the vertical direction. ing. The shift lever 31 has a hollow cylindrical shape, and a compression rod 34 is loosely inserted inside. The compression rod 34 is urged upward (in the direction of arrow A in FIG. 2) by a return spring (not shown) housed in the shift lever 31, and has a male thread 35 on the circumferential surface of its lower end. is engraved. A detent pin 36 is screwed into the male screw 35 at its center, and one end of the detent pin 36 is loosely inserted into the opening 23 through one slide hole 33 and is inserted into the guide. Groove 2
It is located in contact with 4. On the other hand, the shift lever 3
An operating knob 37 is attached to the upper end of the compression rod 34, and when pressed, the operating knob 37 moves in and out of the operating knob 37 to move the compression rod 34 (second
Select button 3 that can be moved downward in the direction indicated by the arrow B in the figure
8 is provided.

On the other hand, an annular lock member 39 is fitted on the outer peripheral surface of the rotation support shaft 30.
A stopper protrusion 40 and a drive piece 42 provided with an elongated hole 41 are protruded from the circumferential surface of the drive member 9 . This locking member 39 locks the stopper protrusion 40 shown in solid lines onto the lower end surface 43 of the compression rod 34.
The lock position L is located close to and facing the stopper protrusion 40 as shown by the chain line.
Unlock position U separated from the extension axis of 3.
It is configured so that it can be rotated. A plunger 45 of an electromagnetic actuator 44, which is a driving means, is locked in the elongated hole 41 provided in the drive piece 42, and the electromagnetic actuator 44 normally projects the plunger 45, and when activated, the plunger 45 projects. It has a characteristic of driving the plunger 45 in and out. The electromagnetic actuator 44 is fixed to the base plate 21 via a bracket 46, and the power supply circuit is connected to the output port of the controller 47 as shown in FIG.
The input port of the controller 47 is connected to the park switch 29 and a brake switch 48 which is turned on by depressing the brake pedal. In addition, in Figure 1,
A finisher 49 is provided with an indicator and the like and covers the detent plate and the like.

In this embodiment with the above configuration, when the shift lever 31 is rotated from an arbitrary traveling position to the P position, the detent pin 36 is located in the recess 25 of the P position, and the detent pin 36 is located in the third position.
As shown in the figure, the detent pin 36 is connected to the contact 2.
8. Then, the park switch 29
ON is activated, and the controller 47 supplies excitation current to the electromagnetic actuator 44 based on this. Therefore, the electromagnetic actuator 44 is energized, the plunger 45 is retracted, and the locking member 39 is
rotates to the lock position L. In this state, if the driver attempts to move the compression rod 34 downward by pressing the select button 38 without depressing the brake pedal, the lower end surface 43 of the compression rod 34 will move against the stopper protrusion 40. The compression rod 34 is prevented from moving downward. Therefore, the detent pin 36 cannot be released from the recess 25 in the P position, and the shift lever 31 is thereby restrained in the P position. At this time, the stopper protrusion 40 contacts the lower end surface 43 and only prevents the compression rod 34 from moving downward. It is only necessary to have a function of blocking movement. Therefore, the stopper protrusion 40 is simply connected to the locking member 3 as shown.
It is sufficient to have a height close to the lower end surface 43 on the circumferential surface of 9, and the shape is extremely simple. Also, like this, move the shift lever 31 to P.
When restraining the detent pin 36 in the position, the locking member 39 does not prevent the movement of the detent pin 36 in any way.
The detent pin 36 prevents the compression rod 34 from moving downward in the axial direction.
No bending stress is created in the compression rod 34, and no bending stress is created in the compression rod 34. Moreover, since the locking member 39 is fitted onto the pivot shaft 30 and prevents the downward movement of the compression rod 34 at the lower end surface 43, the shift lever 31 into which the compression rod 34 is inserted is fixed. By effectively utilizing the space between the lower legs 32, 32 and the pivot shaft 30, the lock member 39 can be placed on the extension axis of the shift lever 31. Therefore, it is not necessary to have a component placement space as in the conventional case where the elongated lock lever 15 (FIG. 5) is disposed in the outer space O of the detent plate 22 shown in FIG. Therefore, the finisher 49 can be made smaller, and the overall shape of the apparatus can be made smaller.
Also, since the lock member 39 is located on the extension axis of the shift lever 31, by arranging the detent plate 22 on the opposite side of the shift lever 31 from the above embodiment, it can be used for right-hand drive vehicles. It is also possible to easily change specifications for left-hand drive vehicles.

Then, when the shift lever 31 is rotated from the P position to each of the driving positions such as D, R, 2, 1, etc., the brake pedal is depressed and operated.
The brake switch 48 is turned ON, and the controller 47 receives the ON signal from the brake switch 48 and stops supplying the excitation current. Therefore, the electromagnetic actuator 44 operates to demagnetize the plunger 4.
5 protrudes, and the locking member 39 rotates to the unlocked position U. When the driver presses the select button 38 in this state, the lower end surface 43 of the compression rod 34 is allowed to move downward without interfering with the stopper protrusion 40. Therefore, the detent pin 36 is released from the recess 25 in the P position, and the shift lever 31 can be rotated to a desired traveling position.

In the above embodiment, the compression rod 34 is prevented from moving downward in the P position, but the locking member 39 can also be rotated to a locking position corresponding to the N position. , it is possible to prevent the compression rod 34 from moving downward even in the N position.

Effects of the Invention As explained above, the present invention includes a locking member fitted to the pivot shaft of the shift lever, and a stopper protrusion formed on the locking member that locks the compression rod inserted into the shift lever. The downward movement of the is prevented at the lower end surface. Therefore, since the stopper projection only has to have the function of blocking only the one-dimensional downward movement of the compression rod, the shape of the stopper projection can be made extremely simple. It becomes possible to reduce molding costs. Moreover, since the detent pin provided on the compression rod does not block the movement of the compression rod, and moreover, the movement of the compression rod is blocked at its lower end surface, the detent pin is of course When the compression rod is stopped from moving, no bending stress occurs in the shear direction. Therefore, there is no need to increase the rigidity of the detent pin or compression rod, and durability can be improved.

Furthermore, since the lock member is fitted onto the pivot shaft of the shift lever, the pivot shaft can be effectively used to attach the lock member, and an increase in the number of parts can be suppressed. .

Furthermore, since the lock member is configured to prevent the downward movement of the compression rod inserted into the shift lever at its lower end surface, the lock member is disposed on the extension axis of the shift lever. . Therefore, the size of the speed change operating device on the side of the shift lever does not increase, making it possible to downsize the device and avoiding interference with other vehicle parts arranged on the side of the shift lever. . Also, as a result of the lock member being disposed on the extended axis of the shift lever, the detent plate can be placed on the opposite side of the shift lever, making it easy to use for right-hand drive vehicles and left-hand drive vehicles. It also allows specifications to be changed.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is a partial cross-sectional explanatory diagram corresponding to Figure 1 - arrows,
FIG. 3 is a sectional view taken along the line shown in FIG. 1, FIG. 4 is a block diagram of the same embodiment, and FIG. 5 is a side view showing a conventional gear shift operation device for an automatic transmission. 22...Detent plate, 30...Rotation shaft,
31...Shift lever, 34...Compression rod, 36...Detent pin, 39...Lock member, 40...Stopper projection, 43...Lower end surface, 44...
Electromagnetic actuator (driving means), L...lock position, U...unlock position.

Claims (1)

[Claims] 1. A shift lever is rotatably supported on the side of the detent plate where a stop position and a running position are set, and the shift lever has a
A compression rod is inserted that is biased upward and moves downward in response to a pressing operation, and is oriented to each of the positions in response to a rotational operation of the shift lever; In the structure in which a detent pin is provided which is released from the position as the compression rod moves downward, a locking member having a stopper protrusion on the circumferential surface is fitted to the pivot shaft of the shift lever. a locking position in which the locking member positions the stopper protrusion facing the lower end surface of the compression rod to prevent the compression rod from moving downward;
The locking member is configured to be rotatable to an unlocked position which is spaced apart from the lower end surface and allows the compression rod to move downward, and the locking member is rotated to the unlocked position when the shift lever is rotated to the stop position. 1. A shift operating device for an automatic transmission, comprising a drive means that rotates to a lock position and to an unlock position based on a brake operation.