JPH0820017B2 - Manual transmission stopper structure for automatic transmission - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stopper structure for preventing a manual plate in a manual valve operating system of an automatic transmission from overstroke in both rotation directions.

(Prior Art) An automatic transmission has a manual valve, and a driver selects the parking (P) range position, the reverse (R) range position, the neutral (N) range position, and the forward automatic shift (D) range. Position, the second speed engine brake (II) range position, and the first speed (engine brake (I) range position) are moved to various range positions to make the hydraulic pressure supply state a desired state, and to park or stop the vehicle. It is possible to achieve a predetermined running form.

By the way, it is necessary for the operating system of the manual valve to set a moderation sensation at each of the above range positions so that the driver can sense this position sensibly. Therefore, the operation system of the manual valve is configured so that the manual valve is stroked through the manual plate that is rotated by the driver's selection operation and provides a moderation feeling for each range position.

On the other hand, the manual plate is configured so as not to overstroke in both rotation directions so that the manual valve does not stroke beyond the range positions at both ends.

As a stopper structure for that purpose, there is a conventional one as shown in FIG. 3 which is adopted in the automatic transmission described in "RE4R01A type automatic transmission" (A261C07) issued by Nissan Motor Co., Ltd. In the figure, 20 is a manual valve, and 21 is a control valve body incorporating a gear shift control hydraulic circuit including this manual valve. The control valve body 21 includes a lower body 22, an upper body 23, and a separate plate 24 interposed therebetween.
It is configured by combining and.

The operating system of the manual valve 20 includes a manual plate 25, which is pivotally supported by a manual shaft 26. Manual valve at one end of manual plate 25
20 and the other end is connected by a link 27 to a select lever operated by the driver. The manual plate 25 further has six notches 25-P, 25-R, 25-N, 25-D, 25 corresponding to the P, R, N, D, II, I ranges on the outer peripheral surface of the other end. -II, 25-I
And a leaf spring type check member 28 which is formed in the notch and gives the above-described moderation sensation.

The manual plate 25 is rotated via the link 27 by the driver's selection operation, and sequentially rotated in the counterclockwise direction from the P range position in the drawing to the R range position, N range position,
The D range position, the II range position, and the I range position (shown by phantom lines) are set, and the manual valve 20 can be set to the corresponding range position. At each range position, the check member 28 has corresponding notches 25-P, 25-R, 25-N, 25-D, 25-II, 25-I.
It gives the driver a sense of moderation and informs the driver of each range position.

On the other hand, in order to prevent overstroke in both rotation directions of the manual plate 25, the end of the manual plate 25 close to the manual valve 20 is made to abut against the casting surface 29, 30 of the control valve body 21. I do.

(Problems to be Solved by the Invention) In the conventional stopper structure for a manual plate, however, the following problems occur because the manual plate 25 is brought into contact with the casting surface 29, 30 of the control valve body 21.

In other words, it is difficult to obtain dimensional accuracy on the casting surface 29,30, and the casting surface 29,3 from the mounting reference R of the control valve body 21.
The distances A ^{± c} and B ^{± d} up to 0 greatly vary, and the distance l between the casting surfaces 29 and 30 is 1 = B-A ^{± (c + d)}
As you can see, there will be even greater variation. Therefore, the size 1 is increased in consideration of this large variation, whereby the manual plate 25 is moved to the P range position,
It is necessary to avoid interference with the surfaces 29 and 30 before reaching the I range position. This means that the allowable overstroke of the manual plate 25 becomes large, and the overstroke of the inhibitor switch that detects the rotation of the manual plate 25 to detect the selected range must be larger than the overstroke of the manual plate 25. Since it had to be done, it was inevitable that the inhibitor switch would become quite large.

In order to solve this problem, it is conceivable to finish the surfaces 29, 30 without leaving them as casting surfaces, but in this case, the number of processing steps increases and the processing cost rises, which is not practical.

The present invention solves the above-mentioned problem by using this surface as a stopper of the manual plate from the viewpoint that the control valve body has an extra surface that is processed to ensure the accuracy when the separate plate mounting surface is processed. The purpose is to do.

(Means for Solving the Problems) For this purpose, the stopper structure for a manual plate according to the present invention strokes the manual valve in the control valve body to various range positions via the manual plate rotated by the driver's selection operation. In the automatic transmission in which the desired state is obtained by the above, when the separate mounting surface is machined on the control valve body, the machining surface additionally formed on the control valve body is formed in both rotation directions of the manual plate. It is characterized by being used as a stopper.

(Operation) When the driver performs a select operation, the manual plate is rotated in conjunction with this to move the manual valve to various range positions. As a result, the automatic transmission is brought into a desired state according to the selected range, and a desired parking, stopping or running mode can be achieved.

When the manual plate is overstroked in both rotation directions, the manual plate collides with the stopper,
Overstroke is prevented.

By the way, when the separate mounting surface is processed on the control valve body, the surface that is additionally processed to ensure accuracy is used as the stopper of the manual plate,
The precision of the manual plate stopper surface can be increased without increasing the processing man-hour and increasing the processing cost. Due to this high precision, the allowable overstroke of the manual plate, which is inevitable in order to avoid interference with the stopper surface at both range positions of the manual plate, can be made small, and the overstroke of the inhibitor switch can be made small accordingly. This inhibitor switch can be downsized.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show an embodiment of the present invention, in which 1 is a manual valve and 2 is a control valve body incorporating a gear shift control hydraulic circuit including this manual valve. The control valve body 2 is formed by sequentially stacking a lower body 3 having a manual valve 1 inserted therein, a separate plate 4, an interbody 5, a separate plate 6, and an upper body 7, and combining them.

To explain the operating system of the manual valve 1, it comprises a manual plate 8. The manual plate 8 is fixed to the manual shaft 9 in the middle thereof and is rotatable through the manual shaft 9, and one end of the manual plate 8 is engaged with the manual valve 1. On the outer circumference of the other end of the manual plate 8, P, R, N, D, I
6 notches corresponding to I, I range 8-P, 8-R, 8-N, 8-
A check member 10 is provided which forms D, 8-II, 8-I, and which is recessed into these notches to give a feeling of moderation at each range position.

When the driver selects, the manual plate 8
Rotates together with the mantle shaft 9 in conjunction with this. This rotation causes the manual plate 8 to move to the R range position or the P range position (shown by a chain double-dashed line) from the N range position shown in the drawing to the clockwise direction in FIG.
When it rotates counterclockwise in the figure, it is in the D range position, the II range position, or the I range position (shown by a chain line). Check member 10 has corresponding notches 8-N, 8-R, 8 at each range position.
-P, 8-D, 8-II, 8-I can be depressed to give a feeling of moderation, and the driver can sensuously know each range position. Then, the manual plate 8 strokes the manual valve 1 to the corresponding range position according to the rotating position, and the automatic transmission can be brought into a desired state.

Next, a tosper structure for preventing the manual plate 8 from overstroke counterclockwise from the position indicated by the one-dot chain line in FIG. 1 and from overstroke clockwise from the position indicated by the two-dot chain line in FIG. 1 will be described.

In the lower body 3, the interbody 5, and the upper body 7, it is necessary to machine the mounting surfaces of the separate plates 4 and 6 with high accuracy and keep them liquid-tight. In order to secure this high accuracy, when the separate plate mounting surface of each body is processed, it is additionally processed including the periphery other than the part in contact with the separate plate. For interbody 5, separate plate 6
There are extraly processed surfaces 11 and 12 when processing the mounting surface of. In this example, both ends of the manual plate 8 in the rotational direction are positioned so that the machined surfaces 11 and 12 are used as stopper surfaces 11 and 12 for preventing overstroke of the manual plate 8.

According to such a stopper structure for a manual plate,
When the manual plate 8 is rotated beyond the P range position shown by the two-dot chain line in FIG. 1, the stopper surface 12 blocks this, and the manual plate 8 is moved by the I range shown by the one-dot chain line in FIG. If it is attempted to rotate it beyond the position, the stopper surface 11 blocks this, and the overstroke of the manual plate 8 can be prevented.

By the way, since the stopper surfaces 11 and 12 are machined surfaces, respectively, the precision is high. Therefore, the stopper surface 1 is located at both range positions (P range position, I range position) of the manual plate 8.
In order to avoid interference with 1 and 12, the allowable overstroke of the unavoidable manual plate 8 can be reduced,
The overstroke of the inhibitor switch can be made smaller accordingly, and the inhibitor switch can be made smaller.

Further, when the stopper surfaces 11 and 12 are machined, the lid is also a machined surface which is additionally formed when the separate plate mounting surface is machined, so that it does not increase the processing man-hours and increase the processing cost. The above effects can be achieved.

(Effect of the Invention) Thus, as described above, the stopper structure for a manual plate of the present invention, when the separate plate mounting surface is machined on the control valve body, the machining surface additionally formed on the control valve body is rotated by both rotations of the manual plate. Since it is a stopper in the direction, the precision of the manual plate stopper surface can be increased and the allowable overstroke of the manual plate can be reduced without increasing the processing man-hours and the processing cost. Can be miniaturized.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a manual valve operating system showing an embodiment of a stopper structure of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a schematic view similar to FIG. 1 showing a conventional stopper structure. FIG. 1 …… Manual valve 2 …… Control valve body 3 …… Lower body 4,6 …… Separate plate 5 …… Interbody 7 …… Upper body 8 …… Manual plate 9 …… Manual shaft 10 …… Checking member 11,12 …… Stopper surface

Claims (1)

[Claims] 1. An automatic transmission in which a desired state is obtained by moving a manual valve in a control valve body to various range positions through a manual plate rotated by a driver's selection operation, A stopper structure for a manual plate for an automatic transmission, characterized in that, when a separate mounting surface is machined on the control valve body, the machined surface additionally formed on the control valve body serves as a stopper in both rotation directions of the manual plate. .