JPS6078144A - Manual valve of automatic speed change gear - Google Patents

Abstract

PURPOSE:To obtain a small-sized hydraulic controller by allowing the engagement edge part of a spool to be inserted into a valve opening. CONSTITUTION:A part of an engagement edge part 22a is inserted by a length of l0 into a valve opening 10, when a spool 22 shifts to the innermost side of the valve opening 10. Therefore, the length in the axial direction which is necessitated for the whole manual valve becomes l2-l0+l3, and the total length is reduced by l0+l1 in comparison with the conventional case, and a small-sized hydraulic controller can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a manual pulp for automatic transmissions.

(b) Prior Art As shown in Figure 1, the manual valve of the conventional automatic transmission has valve holes 10 and 1 provided in the valve body.
It consists of a spool 12 loaded with 0. The valve hole 10 has six ports lOa to LOf.

The spool 12 has two lands 12b and 12c and an engaging end 12a. The engaging end portion 12a is provided with an engaging groove 12d, and the end of the lever 14 is engaged with this engaging groove 12d. The lever 14 is connected to a select lever via a linkage (not shown), and when the select lever is operated, the spool 12 is moved to P,
It can be moved between R, N, D, II, and 1. In FIG. 1, spool 12 is in position P.

Note that the position indicated by the virtual line is the position ■. However, the conventional manual pulp for automatic transmissions has the following problems. That is, since it is necessary to drain oil from the opening of the valve hole 10 at the P position, there is a gap between the engaging end 12a and the opening of the valve hole 10 as shown in FIG. A gap was provided. For this reason, in order to arrange the manual valve, U shown in Fig. 1,
, ＋l Z 13 dimensions were required, and the space required for the manual valve was large. This poses a major problem for hydraulic control systems for automatic transmissions that require a large number of valves to be disposed within a limited space.

(c) Purpose of the Invention The object of the present invention is to obtain a manual valve for an automatic transmission that requires less space and is downsized.

(d) Structure of the Invention The present invention achieves the above object by inserting the engaging end of the spool into the valve hole.

That is, in the manual valve for an automatic transmission according to the present invention, a portion of the retaining end enters into the valve hole at the position where the spool is pushed into the valve hole to the deepest position, and the connection between the valve hole and the engaging end is A gap is formed between them for draining oil.

Embodiments of the present invention will be described below with reference to FIGS. 2 to 4 of the accompanying drawings.

(First Embodiment) A manual valve for an automatic transmission shown in FIG. 2 is composed of a valve hole 10 and a spool 22 inserted into the valve hole IO. Valve hole 10 has 6 ports) 10
a to 10f. Line pressure is always supplied to port 10d. Po) 10f is drain bow 1.
It is. Ports loa, 10b, 10c and toe are supplied with line pressure from ports 1-10d depending on the position of the spool 22. The spool 22 has two lands 22
b and 22c, and an engaging end portion 22a. An engagement groove 22d is provided in the retaining end portion 22a, and the lever 24 is engaged with this engagement groove 22d. Lever 2
4 is connected to a select lever via a linkage (not shown), and the spool 22 can be moved in the axial direction by operating the select lever. Retaining end 2
The outer diameter of the valve hole 2a is smaller than the inner diameter of the valve hole 10. When the spool 22 moves to the innermost side of the valve hole 10 (position P), a part of the engaging end 22a enters into the valve hole 10 by the vertical dimension shown in FIG.

Next, the operation of the manual valve of this automatic transmission will be explained. The spool 22 is set to P by operating the selector lever (not shown) and swinging the
, R, N, D, II, and 1. Port lOd is always supplied with line pressure as described above. The port 10c communicates with the port 110d at the D, II and 1 positions. Port lob is II
and in communication with port 1-IQd at position 1.

Port 10a communicates with port 10d in the working position.

Furthermore, the port 10e communicates with the port 10d at the R position. In the P position, as described above, the spool 22
The engaging end portion 22a of the valve hole 10 is inserted into the valve hole 10 by a length of 0. However, since the outer diameter of the engaging end portion 22a is smaller than the inner diameter of the valve hole 10, the port 10a,
The oils 10b and 10C are discharged through the gap between them. Fig. 2 shows the engaging end 2 in the working position as shown by the imaginary line.
2a, the amount of protrusion of the engaging end in this case is smaller than in the conventional case shown in FIG. In other words, the axial length required for the entire manual valve is approximately 100 meters, as shown in FIG. Therefore, the total length is smaller by 0+1 than the conventional case shown in FIG. As described above, according to the present invention, the space required for the manual valve can be reduced.

(Second Embodiment) FIGS. 3 and 4 show a second embodiment of the present invention. In this embodiment, a notch 22e is provided in the engaging end portion 22a. By doing so, oil can be discharged through the 9J notch 22e, so there is no need to reduce the outer diameter of the engaging end 22a. The rest of the configuration is the same as that shown in FIG. This embodiment is suitable for cases where the outer diameter of the engaging end 22a cannot be made small (for example, when the engaging end 22a
This is effective in cases where a sufficient engagement portion with the lever 24 cannot be secured by reducing the outer diameter of the lever 24.

(-・) Effects of the Invention] 2. As described above, according to the present invention, the spool has an engaging end portion at one end that engages with a lever connected to the select lever via a linkage, and the spool is fitted In a manual valve for an automatic transmission, which is configured from the valve hole to be matched, at the position where the spool is pushed to the deepest point in the valve hole, a part of the engaging end part enters into the valve hole, and the valve hole and Since a gap is formed between the engagement end and the engagement end for draining oil, the space required for the manual valve can be reduced, and the hydraulic control device can be downsized.

[Brief explanation of drawings]

Fig. 1 shows a manual valve of a conventional automatic transmission, Fig. 2 shows a first embodiment of the invention, Fig. 3 shows a second embodiment of the invention, and Fig. 4 shows a manual valve of a conventional automatic transmission. IV-IV in Figure 3
It is a sectional view along a line. 10 --- Valve hole, 22 --- Spool, 22 ae Pa-engaging end, 22 d --- Engaging groove, 24 --- Recess/Ku-0 Patent applicant: Nissan Motor Co., Ltd. Agent valve
Toshi Miyauchi, Physician Line spacing 1 Figure 2 Figure 3 - Figure 4 Broom

Claims (1)

[Scope of Claims] An automatic transmission manual comprising: a spool having an engaging end at one end that engages with a lever connected via a linkage to a select lever; and a valve hole into which the spool is fitted. In pulp, when the spool is pushed into the valve hole the deepest part of the engaging end is inside the valve hole, and there is a hole between the valve hole and the retaining end for draining oil. A manual pulp for an automatic transmission, which is characterized by having an S-shaped groove formed therein.