JPH0318786Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an oil passage structure of a valve body disposed inside an automatic transmission for an automobile.

(Prior Art) FIG. 2 shows a conventional valve body. A spool valve V consisting of a spool a and a sleeve b is disposed within this valve body, and a first oil passage c in the valve body and a first oil flow port d formed in the sleeve b are connected to each other. A second oil passage f in the valve body and a second oil passage g formed in the sleeve b are connected through a second communication hole h.

Conventionally, the first communication hole e is formed by a drill hole drilled from one side i of the valve body,
The second communication hole h is formed by a drill hole drilled from the other side j of the valve body, and the ends of the communication holes e and h are sealed by press-fitting balls k and l, respectively. .

(Problem to be solved by the invention) By the way, according to the above conventional example, the first communication hole e
In order to form the second communicating hole h, it is necessary to drill a hole in each hole, and a sealing operation such as press-fitting the balls k and l is also required in each hole.

(Means for Solving the Problems) In order to solve the above problems, the present invention has a first oil flow port and a second oil flow port located at different positions in the spool movement direction and symmetrically in the circumferential direction. a first communication hole that communicates between a first oil passage and the first oil passage; and a first communication hole that communicates between the second oil passage and the second oil passage; In a valve body in which a communicating second communication hole is formed, the first communication hole and the second communication hole are bored diagonally from a side surface of the valve body.
It is characterized by being formed using a drilled hole in a book.

(Function) According to the above configuration, the first communication hole and the second communication hole can be formed at once by one drill hole drilled diagonally from the side surface of the valve body, and the tip of the drill hole By configuring the oil passage to be stopped at a position where the oil passage reaches one of the oil passages (corresponding to the second oil passage in the embodiment), the sealing operation of the drill hole can be performed by This means that it is only necessary to perform the drilling work on the side opening on the drilling side, and the drilling work and hole sealing work are halved compared to the conventional example.

(Embodiment) FIG. 1 shows a plurality of valve body units 1a,
An example is shown in which the present invention is applied to a multi-layer valve body formed by combining 1b and 1c.

A spool valve 4 consisting of a spool 2 and a sleeve 3 is arranged in this multilayer valve body in the stacking direction. A first oil flow port 5a and a second oil flow port 5b are formed in the sleeve 3 at different positions in the moving direction of the spool 2 and symmetrically in the circumferential direction.

a first oil passage 6 formed within the valve body;
a communicates with the first oil flow port 5a via a first communication hole 7a. Further, the second oil passage 6b formed in the valve body is connected to a second communication hole 7b.
It communicates with the second oil flow port 5b via.

The first communication hole 7a and the second communication hole 7
b is formed by one drill hole diagonally drilled from the side surface 8 of the valve body. This drill hole is drilled before the sleeve 3 is press-fitted into the valve body, and as shown in phantom lines in FIG.
When the tip reaches the second oil passage 6b, the drilling operation is stopped. Further, a ball 9 is press-fitted in order to seal the base end of this drill hole.

The present invention can be configured in various ways other than those shown in the above embodiments. Further, the present invention can also be applied to valve bodies other than multi-layer valve bodies.

(Effects of the invention) Since the present invention has the above-described structure and operation, the drilling and sealing work of the communication hole that communicates the oil flow port of the sleeve with the oil passage in the valve body can be halved, improving work efficiency. I can do it.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is a longitudinal sectional view showing a conventional example. 2... Spool, 3... Sleeve, 5a... First oil flow port, 5b... Second oil flow port, 6a...
...First oil passage, 6b...Second oil passage, 7a...First communication hole, 7b...Second communication hole, 8...Side surface of the valve body.

Claims (1)

[Scope of utility model registration request] A first oil flow port and a second oil flow port are located at different positions in the spool movement direction and at symmetrical positions in the circumferential direction.
a first communication hole that communicates between a first oil passage and the first oil passage; and a second oil passage and the second oil passage; In the valve body in which a second communication hole communicating with the mouth is formed, the first communication hole and the second communication hole are formed by a single drill hole drilled diagonally from a side surface of the valve body. The oil passage structure of the valve body is characterized by: