JP6987449B2 - Oil channel connection structure - Google Patents

Description

The present invention relates to an oil passage connection structure in a transmission.

For example, in a transmission such as a continuously variable transmission (CVT) or an automatic transmission (AT), a brake or a rotating element for braking a rotating element and another rotating element are used. Many clutches for connecting are used. Brake, clutch and torque converter need to be supplied with oil for their operation. Therefore, in the transmission, the hydraulic pressure generated by the oil pump is regulated by the valve body, and the regulated hydraulic pressure is supplied from the valve body to each part requiring oil supply through the oil passage.

FIG. 3 is a cross-sectional view illustrating a part of a conventional transmission.

The valve body 91 is attached to the case 92 forming the outer shell of the transmission from below. A plurality of oil passages are formed in the case 92. Of the plurality of oil passages, the oil passage 93 connected to the valve body 91 is open at the lower end surface of the case 92. An oil passage 94 that communicates inside and outside the valve body 91 is formed on the upper surface of the valve body 91 at a position that vertically overlaps with each oil passage 93. The lower end surface of the case 92 is abutted against the upper surface of the valve body 91, so that the oil passage 93 of the case 92 and the oil passage 94 of the valve body 91 communicate with each other.

Japanese Unexamined Patent Publication No. 5-39864

When changing the connection position between the oil passage 93 of the case 92 and the oil passage 94 of the valve body 91 (the oil transfer position between the oil passages 93 and 94) due to a change in the transmission design, the change is made to the valve body. The change is made in two dimensions in the abutting surface between the upper surface of the 91 and the lower end surface of the case 92. Therefore, as shown by a virtual line in FIG. 3, depending on the connection position between the oil passage 93 of the case 92 and the oil passage 94 of the valve body 91, the member 95 and the oil passage of the case 92 arranged in the case 92 may be connected. It may interfere with the portion where 93 is formed. In this case, in order to avoid interference or to secure a gap between the member 95 and the portion where the oil passage 93 of the case 92 is formed, it is necessary to enlarge the abutting surface between the upper surface of the valve body 91 and the lower end surface of the case 92. Will occur, leading to an increase in the size of the transmission.

An object of the present invention is to improve the degree of freedom in changing the connection position between the oil passages of the valve body (first oil passage, second oil passage) and the oil passages of the case (third oil passage, fourth oil passage). It is to provide an oil channel connection structure that can be used.

In order to achieve the above object, the oil passage connection structure according to the present invention is an oil passage connection structure in a transmission, and a valve body is attached from below to a case forming the outer shell of the transmission to form a valve. The upper surface of the body has a first surface portion and a second surface portion formed in a stepped manner, and the valve body has a first oil passage opened at the first surface portion and a second oil passage opened at the second surface portion. The case has a third oil passage that is abutted against the first oil passage and communicates with the first oil passage, and an open end facing the second oil passage, and communicates with the second oil passage. A fourth oil passage is formed, and an annular gasket surrounding the open end of the fourth oil passage is provided, and the gasket abuts on the second surface portion.

According to this configuration, the valve body is formed with a first oil passage that is opened at the first surface portion of the upper surface thereof, and the case has a third oil passage that abuts against the first oil passage and communicates with the first oil passage. An oil passage is formed. The connection position between the first oil passage and the third oil passage can be changed within the first surface portion. Further, when a second oil passage different from the first oil passage is formed in the valve body and a fourth oil passage communicating with the second oil passage is formed in the case, the second oil passage is formed on the first surface portion. It can also be formed so as to be opened by. Since the first surface portion and the second surface portion of the upper surface of the valve body are formed in a stepped manner, if the second oil passage is formed so as to be opened on the first surface portion, the portion where the fourth oil passage of the case is formed. If and the members arranged in the case interfere with each other, or if a sufficient gap cannot be secured between them, the interference can be avoided by forming the second oil passage so as to be opened at the second surface portion. Or the gap can be secured. Further, the connection position between the second oil passage and the fourth oil passage can be changed in the second surface portion.

Therefore, it is possible to improve the degree of freedom in changing the connection position between the first oil passage and the third oil passage and the connection position between the second oil passage and the fourth oil passage. Also, compared to the configuration in which the transmission is enlarged in order to avoid interference between the part where the fourth oil passage of the case is formed and the members arranged in the case and to secure a gap between them. , The transmission can be downsized.

In a configuration in which the first oil passage and the third oil passage are butted, the second oil passage and the fourth oil passage may be separated from each other without being abutted. An annular gasket that surrounds the open end of the fourth oil passage is provided, and the gasket is in contact with the second surface portion, so that oil leaks from between the second oil passage and the fourth oil passage. (Oil leak) can be suppressed.

According to the present invention, it is possible to improve the degree of freedom in changing the connection position between the oil passage of the valve body and the oil passage of the case, and it is possible to reduce the size of the transmission.

It is a perspective view of the valve body which concerns on one Embodiment of this invention. It is sectional drawing which shows a part of the transmission provided with a valve body graphically. It is sectional drawing which shows a part of the conventional transmission graphically.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Valve body>
FIG. 1 is a perspective view of a valve body 1 according to an embodiment of the present invention.

The valve body 1 is provided in the transmission of a vehicle and is a component for controlling hydraulic pressure (hydraulic oil or lubricating oil) to each part of the transmission. The valve body 1 has a three-story structure in which an upper body 2, a middle body 3, and a lower body 4 are stacked in three upper and lower stages. A separate plate 5 is interposed between the upper body 2 and the middle body 3, and a separate plate 6 is interposed between the middle body 3 and the lower body 4.

An oil passage through which oil flows is formed in the upper body 2, the middle body 3, and the lower body 4. The oil passage formed in the upper body 2 and the oil passage formed in the middle body 3 communicate with each other through a communication passage formed in a predetermined portion of the separate plate 5. Further, the oil passage formed in the middle body 3 and the oil passage formed in the lower body 4 communicate with each other through a communication passage formed in a predetermined portion of the separate plate 6.

The oil passage formed in the upper body 2 includes a plurality of first oil passages 11 extending up and down and opening the upper end thereof. A plane surrounding the upper end of each first oil passage 11 is formed around the upper end. The plane surrounding the upper end of each first oil passage is formed at the same height position to form the first surface portion 12.

The upper body 2 is formed to be smaller in size than the middle body 3 in a plan view. As a result, a part 13 of the separate plate 5 on the middle body 3 is not covered by the upper body 2 and is exposed upward. A reinforcing plate 14 is attached by bolts 15 on a part 13 of the separate plate 5. The oil passage formed in the middle body 3 extends vertically to penetrate the separate plate 5 and the reinforcing plate 14, and the upper end thereof is opened by the second surface portion 16 formed of the upper surface of the reinforcing plate 14. 2 Oil passages 17 are included. The second surface portion 16 is located at a position lower than that of the first surface portion 12, and the first surface portion 12 and the second surface portion 16 are formed in a stepped manner.

<Oil channel connection structure>
FIG. 2 is a cross-sectional view illustrating a part of a transmission provided with a valve body 1. In FIG. 2, the separate plate 5 and the reinforcing plate 14 are not shown.

The valve body 1 is attached to the case 21 forming the outer shell of the transmission from below. The case 21 has a joint portion 22 and a facing portion 23.

The joint portion 22 is joined to the upper body 2 of the valve body 1 by a bolt 32 in a state where the lower end surface 31 thereof abuts against the first surface portion 12 of the valve body 1. A third oil passage 33 is formed in the joint portion 22. The third oil passage 33 is opened at the lower end surface 31 of the joint portion 22. In a state where the joint portion 22 is joined to the upper body 2, the third oil passage 33 is abutted with the first oil passage 11 formed in the upper body 2 and communicates with the first oil passage 11.

The lower end surface 41 of the facing portion 23 faces the second surface portion 16 of the valve body 1 from above. A gap 42 is formed between the lower end surface 41 of the facing portion 23 and the second surface portion 16. A fourth oil passage 43 is formed in the facing portion 23. On the lower end surface 41 of the facing portion 23, a gasket arranging portion 44 having a width (larger diameter) wider than that of the fourth oil passage 43 is formed so as to be recessed upward. The fourth oil passage 43 is open in the gasket arrangement portion 44, and the open end thereof faces the second oil passage 17 opened in the second surface portion 16 in the vertical direction.

An annular gasket 45 is internally fitted in the gasket arrangement portion 44. The inner diameter of the gasket 45 is larger than the diameter of the open end of the fourth oil passage 43, and the circumference of the open end of the fourth oil passage 43 is surrounded by the gasket 45. The gasket 45 is pressed against the second surface portion 16 of the valve body 1, and the fourth oil passage 43 communicates with the second oil passage 17 via the space 46 surrounded by the gasket 45.

<Action effect>
As described above, the valve body 1 is formed with a first oil passage 11 opened by the first surface portion 12, and the joint portion 22 of the case 21 is abutted with the first oil passage 11 to form a first oil passage. A third oil passage 33 communicating with 11 is formed. With the design change of the transmission, the connection position between the first oil passage 11 and the third oil passage 33 can be changed in the first surface portion 12.

Further, a second oil passage 17 different from the first oil passage 11 is formed in the valve body 1. The valve body 1 has a second surface portion 16 which is different from the first surface portion 12, and the second oil passage 17 is opened by the second surface portion 16. A fourth oil passage 43 having an open end facing the second oil passage 17 and communicating with the second oil passage 17 is formed in the facing portion 23 of the case 21. With the design change of the transmission, the position where the second oil passage 17 and the fourth oil passage 43 face each other can be changed in the second surface portion 16.

Therefore, it is possible to improve the degree of freedom in changing the connection position between the first oil passage 11 and the third oil passage 33 and the connection position between the second oil passage 17 and the fourth oil passage 43. Further, the facing portion 23 of the case 21 can be avoided below the member 51 arranged in the case 21 to prevent the member 51 and the facing portion 23 from interfering with each other. Thereby, in order to avoid interference between the configuration shown in FIG. 3, that is, the member 95 arranged in the case 92 and the portion of the case 92 where the oil passage 93 is formed, the upper surface of the valve body 91 and the case Compared with the configuration in which the abutting surface with the lower end surface of 92 is enlarged, the size of the transmission can be reduced.

The second oil passage 17 and the fourth oil passage 43 are separated from each other without being abutted against each other. The facing portion 23 of the case 21 is provided with an annular gasket 45 that surrounds the periphery of the open end of the fourth oil passage 43. The gasket 45 is in contact with the second surface portion 16 of the valve body 1. As a result, it is possible to suppress oil leakage (oil leak) between the second oil passage 17 and the fourth oil passage 43.

<Modification example>
Although one embodiment of the present invention has been described above, the present invention can also be implemented in other embodiments.

For example, in the above-described embodiment, a step is formed between the upper body 2 and the middle body 3, and the first oil passage 11 and the second oil passage 17 are formed in the upper body 2 and the middle body 3, respectively. I picked up the composition. Not limited to this, a step may be formed between the upper body 2 and the lower body 4, and the first oil passage and the second oil passage may be formed in the upper body 2 and the lower body 4, respectively. Further, a step may be formed between the middle body 3 and the lower body 4, and the first oil passage and the second oil passage may be formed in the middle body 3 and the lower body 4, respectively.

The transmission to which the present invention is applied may be a continuously variable transmission (CVT), a continuously variable transmission (AT), or a continuously variable transmission (power split type). You may. The power split type continuously variable transmission is provided with, for example, a belt-type continuously variable transmission mechanism that changes power steplessly by changing the gear ratio, and splits power into two paths between an input shaft and an output shaft. It is a transmission that can be transmitted.

In addition, various design changes can be made to the above-mentioned configuration within the scope of the matters described in the claims.

1: Valve body 11: 1st oil passage 12: 1st surface part 16: 2nd surface part 17: 2nd oil passage 21: Case 33: 3rd oil passage 43: 4th oil passage 45: Gasket

Claims (1)

It is the connection structure of the oil passage in the transmission.
A valve body is attached from below to the case that forms the outer shell of the transmission.
The valve body has a structure in which an upper body and a middle body are stacked one above the other.
A separate plate is interposed between the upper body and the middle body.
The upper body is formed to be smaller in size than the middle body in a plan view.
A part of the separate plate is not covered by the upper body,
A reinforcing plate is mounted on the part of the separate plate.
The upper surface of the valve body has a first surface portion and a second surface portion formed in a stepped manner, and has a first surface portion and a second surface portion.
The second surface portion is composed of the upper surface of the reinforcing plate.
The valve body is formed with a first oil passage that is opened on the first surface portion and a plurality of second oil passages that are opened on the second surface portion.
The case has a third oil passage that is abutted against the first oil passage and communicates with the first oil passage, and an open end facing the second oil passage, and communicates with the second oil passage. A fourth oil passage is formed,
Provided with an annular gasket surrounding the periphery of the open end of the fourth oil passage, the gasket is in contact with the second face, through a space surrounded by the gasket, the said second oil passage An oil passage connection structure that communicates with the fourth oil passage.

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