JPH06297976A - Manual plate structure of automatic transmission and positioning method thereof - Google Patents

Abstract

PURPOSE:To provide the structure of fitting a manual plate and a check member correctly into the set position of an automatic transmission case, and the positioning method thereof. CONSTITUTION:A manual plate 2 and a case 1 are respectively provided with a plate side positioning hole 2b and a case side positioning hole 1c coinciding with each other in a specified range position. At the assembling time of the manual plate 2 and a detent spring, both positioning holes 2b, 1c are made coincide with each other, and a positioning pin 5 is inserted therein to position and fix the manual plate 2 to the case 1. The positioning and fitting of the detent spring is then performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a portion near a manual plate for determining each range position of an automatic transmission applied to a vehicle.

[0002]

2. Description of the Related Art Conventionally, as a manual plate portion structure of an automatic transmission, for example, one described in Japanese Utility Model Laid-Open No. 62-84530 is known. In this conventional automatic transmission, the manual plate portion structure is such that the manual plate is rotatably supported by the case, and one end of the manual plate is connected with the manual shaft that is interlocked with the select operation of the select lever. A parking lock cam is connected to the end, and a positioning ball (check member) that engages with a mountain valley portion formed on the manual plate and determines each range position is provided by being biased by a spring in the engaging direction. It has a structure.

[0003]

In the conventional apparatus as described above, when the check members such as the manual plate and the positioning balls are assembled to the case,
First, the check member is attached to the case and fixed, and then the manual plate is assembled.

As described above, in the procedure of positioning from the side away from the manual plate, if the precision of the case of the automatic transmission, the manual plate, the check member, etc. varies, the positional accuracy of the manual plate in the rotational direction will vary. It was difficult to keep the height high, and there was a risk of displacement of the manual plate.

When the manual plate is displaced in this way, the position of each range valve of the manual valve interlocking with the manual shaft is displaced, and the hydraulic pressure generation timing is deviated, or the amount of this positional deviation is caused. May exceed the mounting adjustment range of the inhibitor switch for detecting each range position, resulting in a problem that the inhibitor switch cannot be mounted in the case. Also,
If the above-mentioned displacement occurs between the manual plate and the check member, and if the direction of the check force of the check member does not point toward the center of rotation of the manual plate, the check force as set cannot be obtained and operability is improved. May deteriorate, or the predetermined check performance may not be obtained.

The present invention has been made in view of the above-mentioned conventional problems, and has a structure and a positioning for manually mounting the manual plate and the check member at a set position with respect to the case of the automatic transmission. It is intended to provide a way.

[0007]

In order to achieve the above-mentioned object, in the present invention, a manual plate connected to a manual shaft that is interlocked with a select operation of a select lever is rotatable to each predetermined range position. A check member, which is supported by a case of the automatic transmission and engages with a valley portion formed on the manual plate with a predetermined check force, is attached to the case, and the check member and the valley portion are engaged with each other. In the structure of the manual plate portion of the automatic transmission for determining the range position, at the position where the manual plate side and the case side coincide with each other when the predetermined ridges and valleys of the manual plate are engaged with the detent spring, Each has a structure in which the plate side positioning hole and the case side positioning hole are formed. Based on the concrete, it was decided to employ the following positioning methods.

That is, with the manual plate rotatably supported by the case of the automatic transmission, the plate-side positioning hole of the manual plate and the case-side positioning hole of the case are made to coincide with each other. Insert the positioning pin into the positioning hole to position and fix the manual plate to the case. Next, the check member is attached to the case after engaging with the predetermined peaks and valleys of the manual plate. Then, the positioning pin is pulled out from both positioning holes.

[0009]

[Operation] When attaching the manual plate and the check member to the case, align the plate-side positioning hole with the case-side positioning hole, and then insert the positioning pins into both positioning holes to attach the manual plate to the case. Positioning and fixing, and then in this positioning and fixing state, the check member is engaged with the predetermined peaks and valleys of the manual plate to position the check member, and then the check member is attached to the case. The positioning is performed from the side, and the positioning accuracy in the rotation direction of the manual plate is high. Further, since the check member is positioned and attached in the state where the manual plate is fixed, the position accuracy of the check member and the work stability are improved.

[0010]

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

FIG. 2 is a plan view showing the structure of the manual plate portion of the automatic transmission according to the embodiment of the present invention. In the figure, reference numeral 1 denotes a case of an automatic transmission, which is removed from a control valve (not shown). A manual plate 2 is rotatably attached near the outer periphery of the case 1. That is, the manual plate 2 is fixed to the tip of the manual shaft 3 as shown in the sectional view of FIG. The manual shaft 3 is rotatably supported in a support hole 1a formed in the case 1. Therefore, when the manual shaft 3 is rotated, the manual plate 2 is rotated with respect to the case 1. By the way, the manual shaft 3 is rotated in conjunction with the operation of a select lever provided in a vehicle compartment (not shown) to operate a manual valve (not shown).

Returning to FIG. 2 and continuing the description, a ridge portion 2a is formed on the outer periphery of the manual plate 2. Further, a detent spring (check member) 4 for engaging with the peaks and valleys 2a and fixing each range position of the manual plate 2 is provided. That is, the detent spring 4 has a predetermined elasticity with the plate portion 41 fixed to the case 1, one end of which is fixed to the plate portion 41 with a bolt 42 and a nut 43, and the other end has the ridges and valleys. And a spring portion 44 provided with a roller 44a engaging with the portion 2a. The plate portion 41 is provided with two oblong mounting holes 41a, 41a, and a bolt 45 is inserted into the mounting hole 41a to form a fastening screw hole 1b formed in the case 1. It is fixed to the case 1 by being fastened.

Further, as shown in FIG. 1, the manual plate 2 is provided with a plate side positioning hole 2b in a direction parallel to the manual shaft 3, while the case 1 is provided with a plate side positioning hole 2b. A case-side positioning hole 1c having the same diameter as the plate-side positioning hole 2b is bored in a position parallel to the hole 2b in a direction parallel to the manual shaft 3. Then, as shown in FIG. 2, both positioning holes 1c, 2b are aligned with each other.
The roller 44a of the detent spring 4 attached at a regular position is bored in such a positional relationship that it engages with a predetermined mountain / valley portion 2a of the manual plate 2 when 2b is matched. In addition, reference numeral 5 in the drawing is a positioning pin used in the later-described positioning work, and the outer diameter of the positioning pin 5 is formed to be slightly smaller than the inner diameters of the positioning holes 1c and 2b. Further, reference numeral 6 in the drawing denotes a manual valve positioning pin.

Next, a procedure for assembling the manual plate 2 and the detent spring 4 into the case 1 will be described.

First, the manual plate 2 is fixed to the manual shaft 3 inserted through the support hole 1a of the case 1 by a split pin (not shown).

Next, the manual plate 2 is rotated with respect to the case 1, and the plate side positioning hole 2b of the manual plate 2 and the case side positioning hole 1c of the case 1 are rotated.
Match with. Then, in this matching state, as shown in FIG. 1, the positioning pin 5 is inserted into both the positioning holes 1c and 2b, and the manual plate 2 is fixed to the case 1 for positioning.

Next, the roller portion 44a of the detent spring 4 is engaged with a predetermined position of the mountain valley portion 2a of the manual plate 2 as shown in FIG. 2, and is further formed on the plate portion 41 of the detent spring 4. Mounting hole 4
1a and 41a are arranged on the fastening screw holes 1b and 1b of the case 1 to position the detent spring 4, and then the bolts 45 and 45 are respectively attached to the mounting holes 41.
a and 41a, and is fastened to the fastening screw holes 1b and 1b, whereby the detent spring 4 is attached to the case 1.
Fixed to.

After that, the positioning pin 5 is pulled out from both the positioning holes 1c and 2b.

As described above, in this embodiment, the manual plate 2 and the case 1 are provided with the plate-side positioning hole 2b and the case-side positioning hole 1c, which respectively match at a predetermined range position. When assembling the manual plate 2 and the detent spring 4, the positioning pins 5 are inserted by aligning the positioning holes 1c and 2b, and the manual plate 2 is positioned and fixed to the case 1. Since the positioning and mounting are performed, positioning is performed from the side close to the manual valve, and the manual plate 2
The positioning accuracy in the rotation direction of the detent spring 4 is high, and with the manual plate 2 fixed.
Since the positioning work and the mounting work are performed, the positioning work of the detent spring 4 is easy and the positional accuracy is high.

Therefore, even if the precision of the case 1, manual plate 2 and detent spring 4 of the automatic transmission varies, the manual plate 2 is unlikely to be displaced. The position at each range position is unlikely to shift, a highly accurate hydraulic pressure generation timing can be obtained, and a high mounting work reliability is also obtained when mounting an inhibitor switch for detecting each range position. The direction of the check force is always directed to the center of rotation of the manual plate 2, and a stable check function and appropriate operability can be obtained.

Although the embodiment has been described above, the specific structure is not limited to this embodiment, and even if there is a design change or the like within a range not departing from the gist of the invention, it is included in the invention. For example, in the embodiment, as the check member, the detent spring 4 having the spring portion 44, one end of which is fixed to the plate portion 41 and the other end of which is provided with the roller 44a that engages with the crests 2a, is shown. If the check member is configured to engage with the ridges and valleys 2a formed on the manual plate 2 to obtain a predetermined check force, for example, a configuration having a spring-biased positioning ball of the related art is used. Other structures such as the above may be used.

Further, in the embodiment, the manual shaft 3
Is rotatably supported by the case 1 of the automatic transmission, and the manual plate 2 is attached to the manual shaft 3 so that the manual plate 2 is rotatably supported with respect to the case 1. Although shown, as in the prior art, the structure may be such that a manual plate is rotatably attached to a case around a pin and a manual shaft that slides with respect to the case is connected to the manual plate.

The shapes of the positioning holes 1c and 2b and the positioning pin 5 are not limited to the circular cross section shown in the embodiment, but may be formed in other shapes such as a triangle and a square.

[0024]

As described above, in the structure of the manual plate portion of the automatic transmission and the method of positioning the same according to the present invention, the manual plate and the case are matched with each other at a predetermined range position. As a structure with plate-side positioning holes and case-side positioning holes, when assembling the manual plate and check member, align both positioning holes and insert positioning pins to fix the manual plate to the case. Since the method of positioning and mounting the check member is adopted, positioning is performed from the side closer to the manual valve.
The positioning accuracy of the rotation direction of the manual plate is high,
Moreover, since the check member is positioned and attached in a stable state with the manual plate fixed, the position accuracy of the check member is also high. Therefore, the case of the automatic transmission, the manual plate, the detent spring, etc. Even if there is a variation in accuracy, the manual plate is less likely to be misaligned, so the position of the manual valve that interlocks with the manual shaft is unlikely to be misaligned, and highly accurate hydraulic pressure generation timing can be obtained. High work reliability is obtained when installing the inhibitor switch for detecting the position, and the check force of the check member is always directed toward the center of rotation of the manual plate to ensure a stable check function and appropriate operation. The effect of being able to obtain Unlikely to.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line S1-S1 of FIG. 2 showing a main part of a manual plate portion structure of an automatic transmission according to an embodiment of the present invention.

FIG. 2 is a plan view showing a structure of a manual plate portion of the automatic transmission according to the embodiment of the present invention.

[Explanation of symbols]

 1 Case 1c Case side positioning hole 2 Manual plate 2a Mountain valley part 2b Plate side positioning hole 3 Manual shaft 4 Detent spring (check member)

Claims (2)

[Claims] 1. A manual plate connected to a manual shaft that is interlocked with a select operation of a select lever is rotatably supported by a case of an automatic transmission in each predetermined range position, and is formed on the manual plate. In a structure of a manual plate portion of an automatic transmission, a check member that is engaged with a predetermined check force is attached to the case, and the check member and the ridges and valleys are engaged to determine each range position. The plate-side positioning hole and the case-side positioning hole are formed at the positions where the manual plate side and the case side coincide with each other when the predetermined ridges and valleys of the manual plate are engaged with the detent spring, respectively. The structure of the manual transmission plate part of the automatic transmission. 2. The plate-side positioning hole of the manual plate and the case-side positioning hole of the case are matched with each other while the manual plate is rotatably supported by the case of the automatic transmission, and both of them are matched. Insert the positioning pin into the positioning hole to position and fix the manual plate with respect to the case, then attach the check member to the case after engaging with the predetermined ridges and valleys of the manual plate, and then A positioning method for a manual plate portion structure of an automatic transmission characterized in that a positioning pin is pulled out from both positioning holes.