JP3620958B2 - Retaining structure for hydraulic control valve of automatic transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a retaining structure at a valve bore end of a valve incorporated in a body of a hydraulic control valve of an automatic transmission, and more particularly to a retaining structure of a hydraulic control valve of an automatic transmission that improves workability when assembling the valve. .
[0002]
[Prior art]
The automatic transmission is performed by controlling the hydraulic pressure supplied to the hydraulic mechanism of each unit by a control valve arranged adjacent to the power train rotating element.
This type of control valve is configured as a unit by, for example, sequentially stacking an upper body, a separator, an interbody, a separator, and a lower body. Each body has a hydraulic circuit and a control valve. The valve is configured by inserting a valve element such as a spool into a valve bore formed on the end face of the body, and is provided with a stopper to prevent them from coming out of the valve bore.
[0003]
FIG. 2 is a sectional view showing an example of the structure. A spool 20 is provided in a valve bore 60 having a port. The plug 40 having a groove on the circumference is inserted into the valve bore 60 up to the contact position when the spool 20 moves outward. A pin hole 50 passing through the groove of the plug 40 is formed in the body 10. By inserting a pin as a fixing member into the pin hole 50, the plug 40 is locked and the spool 20 is prevented from coming off.
[0004]
[Problems to be solved by the invention]
However, in the valve as described above, the pin can easily be removed from the pin hole, and if the plug is not installed at an accurate position, the pin cannot be inserted into the groove and the front and rear positions are adjusted with a jig. There was a problem that workability was not good. .
In addition, when the plug is inserted too far into the valve bore, there is a problem that the assembly position is wrong, such as the pin being outside the plug.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a control valve retaining structure in which the fixing member does not easily fall off and the workability during assembly is improved.
[0005]
[Means for Solving the Problems]
Therefore, according to the present invention, in the valve bore of the body of the hydraulic control valve, the opening of the valve bore is enlarged to form a retaining portion, and the plug is installed at a position away from the shoulder of the valve bore at the retaining portion. A retainer penetrating the retaining portion is inserted to the outside of the plug, a spring is provided between the plug and the shoulder portion, and the spring is supported on the inner periphery of the retaining portion. It was supposed to be.
The retaining portion is preferably expanded to a diameter that allows the plug to be pushed into the valve bore with a finger.
Preferably, the spring is a coil spring, and the plug is installed at a position where it can come into contact with the spool when a spool provided in the valve bore moves to the plug side.
[0006]
[Action]
According to the first aspect of the present invention, since the valve bore is enlarged to provide the spring, the urging force can be applied to the plug without hindering the movement of the spool. Since the plug is pressed against the retainer by the biasing force of the spring, the retainer does not easily fall out of the retainer hole during operation.
When assembling the valve, it can be assembled by inserting the retainer into the retainer hole with the plug pushed inward from the retainer fixing position. It is possible to obtain an effect that cannot make a mistake in the position. This improves the assembly efficiency.
[0007]
By setting the diameter of the retaining portion so that the plug can be pushed into the valve bore with a finger, the valve can be assembled without a jig.
Further, the plug can be provided with a function as a stopper by being installed at a position where the plug can come into contact with the spool provided in the valve bore.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described by way of examples.
FIG. 1 is a cross-sectional view showing the configuration of the embodiment. A valve bore 7 having a diameter of 8 mm is formed in the approximate center of an aluminum body 1 whose upper and lower surfaces are processed into a flat surface. The valve bore 7 is provided with a pressure oil inlet / outlet port. The spool 2 is driven by pressure oil from the port.
[0009]
The tip of the valve bore 7 is connected to the retaining portion 6. The retaining portion 6 is formed to have a diameter of 12 mm so that a finger can be inserted by expanding the diameter of the spool 2.
A retainer hole 8 that passes through the center of the retaining portion and passes between the upper and lower surfaces of the body 1 is formed on the opening side of the retaining portion 6.
[0010]
The spring 3 is a coil spring and is seated on the shoulder of the valve bore 7 and the retaining portion 6 and applies a biasing force to the plug 4 installed in the opening. The plug 4 is in contact with the retainer 5 and is prevented from moving outward. The retainer 5 is inserted into the retainer hole 8 and fixed by being crimped to the wall of the retainer hole 8 by the spring force from the plug 4.
[0011]
When assembling the valve, the spool 2 is first inserted into the valve bore 7. While the plug 4 is mounted on the valve bore, the spring 3 is pressed inward from the retainer hole 8 while compressing the spring 3 with a finger. The retainer 5 is inserted into the retainer hole 8 from the upper surface of the body 1, and the finger is removed at the point where it hits the finger, and the retainer 5 is pushed down. The plug 4 returns to the fixed position by the restoring force of the spring 3 and presses the retainer 5 against the wall surface of the retainer hole. The thickness of the plug and the position of the retainer hole are set so that the plug 5 functions as a stopper.
Other bodies are stacked on the upper and lower surfaces of the body 1, and the retainer 5 is sealed in the retainer hole 8 by them.
[0012]
As described above, the diameter of the valve bore is expanded to form a retaining portion, and the retaining portion is provided with a spring that applies a biasing force to the plug. Therefore, even in a valve without a spring, the plug can be pressed against the retainer. it can.
Further, since the plug is fixed from the outside by the retainer, there is no position adjustment at the time of fixing, and the effect of not causing a mistake in assembling position can be obtained.
[0013]
【The invention's effect】
According to the first aspect of the present invention, since the valve bore is expanded to provide the spring, the plug can be pressed against the retainer even with a valve having no spring. As a result, the retainer does not easily fall out of the retainer hole, and workability during assembly is improved.
In addition, since the retainer can be inserted into the retainer hole with the plug pushed inward from the retainer's fixed position, assembly is simplified, and the plug is returned to the fixed position by spring force. The effect that cannot be caused is obtained.
[0014]
The stopper can be assembled without a jig by expanding the diameter of the stopper so that the plug can be pushed into the valve bore with a finger.
Further, when the plug is installed at a position where it can come into contact with the spool provided in the valve bore, the plug can have a function as a stopper.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration of an embodiment.
FIG. 2 is a diagram showing a conventional example.
[Explanation of symbols]
1, 10 Body 2, 20 Spool 3 Spring 4, 40 Plug 5 Retainer 6 Retaining hole 7, 60 Valve bore 8 Retainer hole 50 Pin hole

Claims (3)

In the valve bore of the body of the hydraulic control valve, the opening portion of the valve bore is enlarged to form a retaining portion, and a plug is installed at a position away from the shoulder portion of the valve bore at the retaining portion. A retainer penetrating the retaining portion is inserted in the direction, a spring is provided between the plug and the shoulder portion, and the spring is supported on the inner periphery of the retaining portion. Structure to prevent the hydraulic control valve of the transmission from coming off. 2. The retaining structure for a hydraulic control valve of an automatic transmission according to claim 1, wherein the retaining portion is expanded to a diameter that allows the plug to be pushed into the valve bore with a finger. 2. The spring according to claim 1, wherein the spring is a coil spring, and the plug is installed at a position where it can come into contact with the spool when a spool provided in the valve bore moves to the plug side. The structure for retaining the hydraulic control valve of automatic transmissions.

Images