JPH01160732A - Gear shifting device for automatic transmission - Google Patents

Abstract

PURPOSE:To simplify the shape of a stopper protrusion by checking the downward movement of a compression rod through the stopper protrusion formed on a locking member. CONSTITUTION:An annular locking member 39 is fitted on the periphery of a rotating support shaft 30, and the peripheral surface of the locking member 39 is protrusively provided with 8 stepper protrusion 40 and a driving piece 42 provided with a long hole 41. The locking member 39 is formed to rotatably attain a locked position L where the stopper protrusion 40 is located near and opposite the lower end surface 43 of a compression rod 34 as shown by a full line and an unlocked position U where the stopper protrusion 40 is separated from the lower end surface 43 of the compression rod 34 on the extension axis of the rod 34 as shown by a chain line.

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.

2. Description of the Related Art Conventionally, as a shift operating device for an automatic transmission mounted on an automobile, one having the structure shown in FIG. 5 has been put into practical use. That is, a detent plate 10 is installed upright on the vehicle floor, and the detent plate 10 has driving positions such as R (reverse) and D (drive), and P (parking lock) and neutral (N). A guide groove is formed in which stop positions such as the following are set. A shift lever 13 is pivotally supported on one side of the detent plate IO by a pivot shaft 12.
3, by pressing a select button (not shown), the guide groove 11 is moved downward and is biased upward.
A detent pin (4) that comes into contact with is provided. A lock lever 15 is provided on the other side of the detent plate IO, and is supported together with the shift lever 13 by a pivot shaft 12.
) An engagement recess 16 is formed in the free end. This lock lever 15 receives the detent pin 14, which is in the P position, in the engagement recess 16, and then the shift lever! It is configured to be rotatable between a lock position L (shown by a chain line) in which rotational operation of the detent pin 3 is prevented, and an unlock position U (shown by a solid line) in which it is pulled away from the detent pin 14 by a return spring 17. This lock lever 1
5 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 equipped with a control circuit (Fig. (not shown) are linked. 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 excited. Therefore, the planter 19 protrudes and moves the lock lever 15 to the lock position L1. : 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 is activated! 5 rotates to unlock position U.

This makes it possible for the detent pin I4 to move from the P position to any other driving position, and by making it impossible to shift to the driving position without controlling the brake, the brake position can be changed by the driver. This allows the user to learn the correct operations and prevents incorrect operations.

Problems to be Solved by the Invention However, in such a conventional eRl, in order to restrain the detent pin 14 to the P-polision, it is necessary to move the detent pin 14 downward as the select button is pressed. , Following this, shift lever -1
It is also necessary to prevent the detent pin I4 from moving laterally when the detent pin I4 is rotated from the P position to the R position. Therefore, the engagement recess 16 formed in the lock lever 15 is required to have the function of not only blocking the downward movement of the detent pin 14 but also blocking the lateral movement. Engagement recess like this! 6 has a complicated shape in order to have a function of preventing the two-dimensional movement of the detent pin 14.

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, when the detent pin 14 is moved, the detent pin 14 is Bending stress is generated in the direction.

Therefore, it is necessary to take measures to resist the bending stress, such as increasing the diameter of the detent pin 14 or molding it from a highly rigid material, resulting in disadvantages in terms of weight and cost.

Furthermore, in order to position the soft lever 13 more reliably, the detent pin 14 is provided at a position separated by a predetermined length Q (approximately 50 mm) from the pivot shaft 12, which is the pivot point of the shift lever 13. Therefore, the lock lever 15, which is pivotally supported by the pivot shaft 12 and restrains the detent pin 14, has a length of at least 4 or more.

Therefore, it is necessary to secure a space on the side of the detent plate 10 to arrange the elongated lock lever tS and a space necessary for the lock lever 15 to rotate between the lock position and the unlock position U. First, the disadvantage of increasing the size of the entire device was also avoided.

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

Means for Solving the Problems In order to solve the above problems, the present invention provides stop positions such as P (parking) and neutral (N),
R (reverse), D (drive).

A detent plate with running positions such as 2 (second) and l (first) is fixed upright on the vehicle body, and a shift lever that can be rotated to each of the positions is pivotally supported on the side of the detent plate. A compression rod is inserted into the shift lever, which is biased upwardly and moves downwardly when the shift lever is pressed. In the structure in which a detent bin is provided which is released from each position as the rod moves downward, an annular locking member having a stopper protrusion on the circumferential surface is fitted to the pivot shaft of the shift lever. The member has a locking position in which the stop collar protrusion FJ is positioned opposite to the lower end surface of the compression rod to prevent the compression rod from moving downward, and an unlocking position in which it is separated from the lower end surface and allows the compression rod to move downward. The locking member is configured to be rotatable in the following manner, and the locking member is rotated to the locking position based on a rotational operation of a shift lever to a stop position, and is rotated to an unlocking position based on a brake operation. Means are provided.

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, whereby the stopper protrusion is located opposite to the lower end surface of the compression rod, 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 restricted to the P position. At this time, since the stopper protrusion merely prevents the downward movement of the compression rod, it is sufficient that the stopper protrusion has the function of preventing only one-dimensional movement of the compression rod, and its shape may be simple. Become. In addition, the locking member does not directly block the movement of the detent pin, but blocks the downward movement of the compression rod, that is, the movement in the axial direction. Therefore, bending stress will also occur on the compression rod, even if the detent pin is oil-free. do not have.

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 lock member is located at the lower part of the shift lever into which the compression rod is inserted, and is attached to the rotation support shaft. The locking member and the like can be arranged by effectively utilizing the space around the axis.

Example An embodiment of the present invention will be described below with reference to the drawings.

That is, as shown in FIG. 1.2, 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 top of the opening 23. The guide groove 24 has a stop position P.

N1 and running positions R, D, and 2.1 are set, and a recess 25 is formed at the P position, and a protrusion 26 is formed between the P and R positions. Further, as shown in FIG. 3, a bent piece 27 extends from the side edge of the detent plate 22, and a park switch 29 having a contactor 28 is attached to the bent piece 27.

Further, a pivot shaft 30 is rotatably inserted into the lower central portion of the detent plate 22, and the pivot shaft 30 is connected to the lower end portion 1 of the shift lever 3I. : Installed and facing each other! A pair of legs 32.32 are secured, the legs 32.32
A slide hole 33° 33 is provided in the vertical direction. The shift lever 31 has a hollow cylindrical shape, and a compression rod 34 is loosely inserted inside. The compression rod 34 is biased 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 carved on the circumferential surface of its lower end. There is. The male thread 35 includes:
A detent pin 36 is screwed at the center thereof, and one end of the detent pin 36 is loosely inserted into the opening 23 through one of the slide holes 33, and is brought into contact with the guide groove 24 and positioned. There is. One-sided shift lever 31
An operating knob 37 is attached to the upper end, and the operating knob 37 is retracted when pressed to move the compression rod 34 downward (in the direction of the arrow in FIG. 2). A select button 38 is provided.

On the other hand, an annular locking member 39 is fitted on the outer circumferential surface of the rotation support shaft 30, and a drive piece 42 provided with a stopper protrusion 40 and a long hole 41' is provided on the circumferential surface of the locking member 39.
is provided protrudingly. This locking member 39 connects the stopper protrusion 40 indicated by a solid line to the combination tongue rod 3.
The stopper protrusion 40 can be rotated between a locked position close to and facing the lower end surface 43 of 4 and an unlocked position U where the stopper protrusion 40 is spaced apart from the extension axis of the lower end surface 43 as shown by the chain line. It is configured as follows. A plunger 45 of an electromagnetic actuator 44 serving as 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.
It also has a characteristic of driving the plunger 45 in and out when excited. 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 park switch 29 is connected to a brake switch 48 which is turned on by depressing the brake pedal. Note that the first
In the figure, 49 is a finisher that is provided with an indicator and the like and covers the detent plate and the like.

In this embodiment with the above configuration, the shift lever 31
When the detent pin 36 is rotated from an arbitrary running position to the P position, the detent pin 36 is located in the recess 25 at the P position, and the detent pin 36 comes into contact with the contact 28 as shown in FIG. Then, the park switch 29 is turned ON, and the controller 47 supplies an exciting 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 rotated to the locked position. In this state, if the driver attempts to move the combination gin rod 34 downward by pressing the select button 38 without depressing the brake pedal, the lower end surface 43 of the compression rod 34
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 3I is thereby restrained in the P position. At this time, the stopper protrusion 40 is
The compression rod 34 is in contact with the lower end surface 43.
Since it only prevents the downward movement of the compression rod 34, it is sufficient to have the function of preventing only the downward movement of the compression rod 34, that is, the one-dimensional movement. Therefore, as shown in the figure, it is sufficient that the stopper protrusion 40 has a height close to the lower end surface 43 on the circumferential surface of the lock NNC 39, and its shape is extremely simple. In addition, when the shaft lever 31 is restrained to the P-bodsion in this way, the three locking members do not prevent the movement of the detent pin 36 in any way, but prevent the downward movement of the compression rod 34 in the axial direction. Detent pin 36
There is no bending stress on the combined gin rod 34, nor is there any bending stress on the combined gin rod 34. Therefore, the locking member 39 is fitted onto the pivot shaft 30 and prevents the downward movement of the combination gin rod 34 at the lower end surface 43, so that the locking member 39 is attached to the lower leg of the shift lever 31 into which the compression rod 34 is inserted. By effectively utilizing the space between 32 and 32 and the pivot shaft 30, the three locking members can be arranged on the extension axis of the shift lever 31.

Therefore, in the outer space 0 of the detent plate 22 shown in FIG.
(FIG. 5) does not require a space for arranging parts, and therefore the overall shape of the apparatus can be made smaller, such as by making the finisher 49 smaller. In addition, since the locking member 39 is located on the extension axis of the shift lever 31, by disposing the detent plate 22 on the opposite side of the shift lever 31 from that in the above embodiment, it can be used for right-hand drive vehicles and for left-hand drive vehicles. This makes it possible to easily change the specifications for use with steering wheel vehicles.

Then move the shift lever 31 to the P position.

When the brake pedal is depressed and operated when rotating to each traveling position such as R, 2, 1, etc., the brake switch 48 is turned on, and the controller 47 receives the ON signal from the brake switch 48 and starts supplying the excitation current. Stop. Therefore, the electromagnetic actuator 44 operates to demagnetize,
The plunger 45 protrudes and the lock member 39 rotates to the unlock position U. When the driver presses the select button 38 in this state, the compression rod 34
The lower end surface 43 of 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 driving position.

In the above embodiment, the compression rod 34 is prevented from moving downward at the P position, or the locking member 39 is configured to be able to rotate to the locking position corresponding to the N position. However, it is possible to prevent the compression rod 34 from moving downward.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention includes a locking member fitted onto the pivot shaft of a shift lever, and a stopper protrusion formed on the locking member that allows the compression rod inserted into the shift lever to move downward. The lower end surface is designed to prevent this. Therefore, the stopper protrusion only needs to have the function of blocking one-dimensional downward movement of the compression rod, so the shape of the stopper protrusion can be made extremely simple, reducing molding costs. It becomes possible to aim for. In addition, 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 oil-free and also prevents movement of the compression rod. No bending stress is generated in the shear direction when this happens. Therefore, there is no need to increase the rigidity of the detent pin or compression rod, and durability can be improved.

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

Further, since the lock member is configured to prevent the compression rod inserted into the shift lever from moving downward 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, the size of the device can be reduced, and interference with other vehicle parts arranged on the side of the shift lever can be avoided. In addition, as a result of the locking member being arranged on the extended axis of the shift lever, specifications for right-hand drive vehicles and left-hand drive vehicles can be easily changed by arranging the detent plate on the opposite side of the shift lever. It is also possible for you to make changes.

[Brief explanation of the drawing]

FIG. 1 is a side view showing one embodiment of the present invention, and FIG. 2 is a side view showing one embodiment of the present invention.
A partial cross-sectional explanatory diagram corresponding to the arrows in Figure ■-■, Fig. 3 is a cross-sectional view indicated by the arrows in Fig. 1, and Fig. 4 is a block diagram of the same embodiment.
FIG. 5 is a side view showing a conventional shift operating device for an automatic transmission. 22... Day tin tobi plate, 30... Rotation support shaft, 31... Shift lever 134... Compression rod, 36... Detent pin, 39... Lock member, 40... Stopper Protrusion, 43...lower end surface,
44...Electromagnetic actuator (driving means), L...
Lock position, U... unlock position. Figure 2 j So Figure 3 Figure 4 Figure 5?

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 is biased upwardly and downwardly when pressed. A structure in which a compression rod is inserted, and the compression rod is provided with detent pins that are positioned at the respective positions in response to rotation of the shift lever and released from the positions 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, and the locking member positions the stopper protrusion opposite to the lower end surface of the compression rod, so that the compression rod is closed. The locking member is configured to be rotatable between a locking position that prevents downward movement of the shift lever and an unlocking position that allows the compression rod to move downwardly when separated from the lower end surface. A speed change operation device for an automatic transmission, characterized in that a drive means is provided that rotates to the lock position based on a rotation operation and rotates to the unlock position based on a brake operation.