JPH04254058A - Control valve unit for transmission - Google Patents

Abstract

PURPOSE:To rationalize the disposition of an oil passage by forming an intermediate valve body in a control valve unit formed of a three-piece valve body to be largest so as to be connected to the oil passage of a casing, and fitting solenoids to a lower valve body in such a way as not to protrude outside the intermediate valve body. CONSTITUTION:An upper valve body 16, an intermediate valve body 18 and a lower valve body 20 are overlapped to form a control valve unit 14. The intermediate valve body 18 is made largest in contour shape and connected to the oil passage of a casing 10. Solenoids 24, 26 are fitted to the side faces of the lower valve body 20, and the contour shape of the lower valve body 20 is set in such a way that the solenoids 24, 26 are not protruded outside the intermediate valve body 18. Accordingly, even if an obstruction approaches the control valve unit 14 from the lateral direction, the obstruction stops in contact with the side part of the intermediate valve body 18, so that the solenoids 24, 26 are prevented from being damaged.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control valve unit for a transmission.

0002

[Prior Art] As a conventional transmission control valve unit, there is one shown in Fig. 3 (Nissan Automobile Automatic Transmission RL4F03A type,
(See Service Manual pages B-270 and B-48). The control valve unit of this transmission is composed of an upper valve body 50, an intermediate valve body 52, and a lower valve body 54. Lower valve body 5
The outer shape of the valve body 4 is larger than that of the other valve bodies, and the valve body 4 is attached to the casing 56 at this projecting portion. Lower valve body 54 and casing 5
The oil passage is connected to the contact surface with 6. Solenoids 58 and 60 are attached to the sides of the lower valve body 54.

0003

However, the conventional transmission control valve unit as described above has a problem in that the solenoid protrudes to the side of the valve body and is not sufficiently protected during assembly. That is, since the solenoids 58 and 60 are exposed, there is a possibility that other parts may come into contact with the solenoids, resulting in insufficient protection. Furthermore, this conventional control valve unit for a transmission has a problem in that the connection of oil passages between the valve bodies is complicated. That is, when it is necessary to connect an oil passage between the upper valve body 50 and the lower valve body 54, the oil passage always passes through the intermediate valve body 52; The shape is smaller than that of the lower valve body 54, which complicates the arrangement of oil passages in the intermediate valve body 52 in particular. The present invention aims to solve these problems.

0004

SUMMARY OF THE INVENTION The present invention solves the above problems by increasing the outer shape of the intermediate valve body and attaching it to the casing. That is, the control valve unit for a transmission according to the present invention is configured by overlapping an upper valve body, a lower valve body, and one or more intermediate valve bodies disposed in an intermediate portion thereof, and includes: The two intermediate valve bodies have a larger outer shape than the other valve bodies, and the protruding portion of the outer shape of the intermediate valve body is attached to the valve mounting surface of the casing in close contact with the casing side at this close contact portion. Connection with the oil passage is made, and a solenoid is attached to the side of the valve body located below this intermediate valve body, and the end opposite to the side where the solenoid is attached is attached to the intermediate valve body. It is set so that it does not protrude outward beyond the outline shape of.

[0005] An intermediate valve body is attached to the casing, and a solenoid is attached to a smaller valve body located below the intermediate valve body. The solenoid is included in the projection plane of the intermediate valve body when viewed in plan. Therefore, the solenoid is protected by the intermediate valve body even against obstacles from the side during assembly. This reduces the possibility of damage to the solenoid. Further, since the intermediate valve body has the largest outer shape, it is easy to arrange an oil passage connecting the upper valve body and the lower valve body.

[0006]

[Embodiment] An embodiment is shown in FIGS. 1 and 2. Casing 1
An oil pan 12 is attached to the lower surface of the casing 10, and a control valve unit 14 is arranged in a space on the lower side of the casing 10 constituted by both. The control valve unit 14 has an upper valve body 16
, an intermediate valve body 18, and a lower valve body 20, which are connected in an overlapping state in this order. The intermediate valve body 18 has the largest outer shape, and the oil passage on the casing 10 side and the oil passage on the intermediate valve body 18 side are connected at the projecting portion thereof. Solenoids 24, 26 and 28 are attached to the sides of the lower valve body 20. The outer shape of the lower valve body 20 is considerably smaller than the outer shape of the intermediate valve body 18, so that even with the solenoids 24, 26, and 28 attached,
The overall contour shape is smaller than the contour shape of the intermediate valve body 18. That is, the intermediate valve body 18
When viewed from above, not only the lower valve body 20 but also the solenoids 24, 26, and 28 attached thereto are hidden behind the intermediate valve body 18 and cannot be seen. If an obstacle approaches the control valve unit 14 from the side for some reason, it collides with the side of the intermediate valve body 18 and stops. Therefore, the obstruction moving from the side can cause the solenoids 24, 2
6 and 28, and their damage is prevented. Further, for example, when the oil pressure in the oil passage in the lower valve body 20 is configured to be controlled by the solenoid 24 and the oil pressure in this oil passage is used for switching the valve in the upper valve body 16, Although it is necessary to connect the oil passages through the intermediate valve body 18, the intermediate valve body 18 has the largest outer shape, and there is plenty of room for the oil passages, making it easy to connect a large number of oil passages. It can be carried out.

[0007]

[Effects of the Invention] As explained above, according to the present invention, the outer shape of the intermediate valve body is made the largest, and the solenoid is attached to the valve body below this, so that the solenoid is protected. The connection of oil lines will also be streamlined.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an embodiment of the invention.

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 3 is a diagram showing a control valve unit of a conventional transmission.

[Explanation of symbols]

10 Casing 14 Control valve unit 16 Lower valve body 18 Intermediate valve body 20 Lower valve body 24 Solenoid 26 Solenoid 28 Solenoid

Claims (1)

[Claims] Claim 1: In a control valve unit for a transmission, which is configured by overlapping an upper valve body, a lower valve body, and one or more intermediate valve bodies disposed in an intermediate portion thereof, one intermediate valve body The valve body has a larger outer shape than other valve bodies, and the protruding part of the intermediate valve body is attached to the valve mounting surface of the casing in close contact with the casing side oil passage. A solenoid is attached to the side of the valve body located below this intermediate valve body, and the end opposite to the side where the solenoid is attached is connected to the outer shell of the intermediate valve body. A transmission control valve unit characterized by being set so as not to protrude outward beyond its shape.