JP2019100420A - Connecting structure of oil path - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil passage connection structure capable of improving the degree of freedom of changing the connection position between an oil passage of a valve body and an oil passage of a case. SOLUTION: A valve body 1 is formed with a first oil passage 11 opened by a first surface portion 12, and a joint portion 22 of a case 21 is abutted with the first oil passage 11 to form a first oil passage 11. A third oil passage 33 communicating with the oil passage 33 is formed. Further, a second oil passage 17 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. 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. [Selection diagram] Fig. 2

Description

  The present invention relates to a connection structure of oil passages in a transmission.

  For example, in transmissions such as Continuously Variable Transmission (CVT) and Automatic Transmission (AT), a brake for rotating the rotating element and another rotating element are required. Many clutches and the like for coupling are used. The brakes, clutches and torque converters 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 through the oil passage to each part that requires the supply of oil.

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

  The valve body 91 is attached from the lower side to a case 92 which is an outer shell of the transmission. The case 92 is formed with a plurality of oil passages. Among the plurality of oil passages, an oil passage 93 connected to the valve body 91 is opened at the lower end face of the case 92. An oil passage 94 communicating the inside and the outside of the valve body 91 is formed on the top surface of the valve body 91 at a position overlapping the oil passages 93 vertically. The oil passage 93 of the case 92 and the oil passage 94 of the valve body 91 communicate with each other by bringing the lower end surface of the case 92 into abutment with the upper surface of the valve body 91.

Unexamined-Japanese-Patent No. 5-39864

  When changing the connection position of oil passage 93 of case 92 and oil passage 94 of valve body 91 (the delivery position of oil between oil passages 93 and 94) due to a change in transmission design, the change may be made by changing the valve body This is a two-dimensional change in the butt plane between the upper surface of the upper surface 91 and the lower end surface of the case 92. Therefore, depending on the connection position of the oil passage 93 of the case 92 and the oil passage 94 of the valve body 91, as shown by a phantom line in FIG. 3, the member 95 arranged in the case 92 and the oil passage of the case 92 It may interfere with the portion where 93 is formed. In this case, in order to avoid interference or secure a gap between the member 95 and the portion of the case 92 where the oil passage 93 is formed, it is necessary to enlarge the butting surface of the upper surface of the valve body 91 and the lower end surface of the case 92 And cause the transmission to become larger.

  The object of the present invention is to improve the freedom of changing the connection position between the oil passage (first oil passage, second oil passage) of the valve body and the oil passage (third oil passage, fourth oil passage) of the case. It is possible to provide a connection structure of oil passages.

  In order to achieve the above object, a connection structure of an oil passage according to the present invention is a connection structure of an oil passage in a transmission, and a valve body is attached from the lower side to a case forming an outer shell of the transmission The upper surface of the body has a first surface portion and a second surface portion formed in a step, and the valve body includes a first oil passage opened at the first surface portion and a second oil passage opened at the second surface portion. And a third oil passage which abuts on the first oil passage to communicate with the first oil passage, the case has an open end facing the second oil passage, and is in communication with the second oil passage. A fourth oil passage is formed, and an annular gasket surrounding the periphery of the open end of the fourth oil passage is provided, and the gasket abuts on the second surface.

  According to this configuration, the valve body is formed with the first oil passage opened at the first surface portion of the upper surface, and the case is brought into abutment with the first oil passage and is communicated with the first oil passage. An oil passage is formed. The connection position of the first oil passage and the third oil passage can be changed in the first surface portion. When the second oil passage separate from the first oil passage is formed in the valve body, and the fourth oil passage communicating with the second oil passage is formed in the case, the second oil passage forms the first surface portion. It can also be formed to be open at Since the first surface portion and the second surface portion of the upper surface of the valve body are formed in a step difference, when the second oil passage is formed to be opened at the first surface portion, a portion where the fourth oil passage of the case is formed If the second oil passage is opened at the second surface when there is an interference between the two and a member disposed in the case or if a sufficient gap can not be secured between them, the interference is avoided. Or you can secure the gap. Furthermore, the connection position of the second oil passage and the fourth oil passage can be changed in the second surface portion.

  Therefore, it is possible to improve the freedom of 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. In addition, the transmission is larger than that of the transmission in order to avoid the interference between the portion where the fourth oil passage of the case is formed and the member disposed in the case and to secure a gap between them. The size of the transmission can be reduced.

  In the configuration in which the first oil passage and the third oil passage abut on each other, the second oil passage and the fourth oil passage may be separated without being abutted on each other. An annular gasket is provided surrounding the periphery of the open end of the fourth oil passage, and the gasket is in contact with the second surface portion, whereby oil leaks from between the second oil passage and the fourth oil passage. (Oil leak) can be suppressed.

  According to the present invention, the degree of freedom in changing the connection position of the oil passage of the valve body and the oil passage of the case can be improved, and the transmission can be miniaturized.

It is a perspective view of a valve body concerning one embodiment of the present invention. FIG. 2 is a cross-sectional view schematically illustrating a portion of a transmission provided with a valve body. FIG. 10 is a cross-sectional view schematically showing a part of a conventional transmission.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the attached 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 a component that is provided in a transmission of a vehicle and controls the hydraulic pressure (hydraulic oil or lubricating oil) to each part of the transmission. The valve body 1 has a three-story structure in which the upper body 2, the middle body 3 and the lower body 4 are stacked in three stages up and down. 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.

  In the upper body 2, the middle body 3 and the lower body 4, oil passages through which oil flows are formed. The oil passage formed in the upper body 2 and the oil passage formed in the middle body 3 communicate with each other via 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 at 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 which extend vertically and whose upper end is opened. Around the upper end of each first oil passage 11, a plane surrounding the upper end is formed. The plane surrounding the upper end of each first oil passage constitutes the first surface portion 12 by being formed at the same height position.

  The upper body 2 is smaller than the middle body 3 in a plan view. Thereby, the part 13 of the separate plate 5 on the middle body 3 is exposed upward without being covered by the upper body 2. A reinforcing plate 14 is attached to a part 13 of the separate plate 5 by a bolt 15. Then, the oil passage formed in the middle body 3 extends vertically and penetrates the separate plate 5 and the reinforcing plate 14, and a plurality of second surface portions 16 whose upper ends are opened by the upper surface of the reinforcing plate 14 are opened. 2 oil passage 17 is included. The second surface portion 16 is located at a lower position than the first surface portion 12, and the first surface portion 12 and the second surface portion 16 are formed to be uneven.

<Connection structure of oil passage>
FIG. 2 is a cross-sectional view schematically showing a part of the transmission in which the valve body 1 is provided. In FIG. 2, the separation plate 5 and the reinforcing plate 14 are not shown.

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

  The joint portion 22 is joined to the upper body 2 of the valve body 1 by the bolt 32 in a state where the lower end face 31 of the joint portion 22 abuts on the first surface portion 12 of the valve body 1. The third oil passage 33 is formed in the joint portion 22. The third oil passage 33 is open at the lower end surface 31 of the joint 22. In a state where the joint portion 22 is joined to the upper body 2, the third oil passage 33 is in contact with the first oil passage 11 formed in the upper body 2 and is in communication with the first oil passage 11.

  The lower end surface 41 of the opposing portion 23 is opposed to the second surface portion 16 of the valve body 1 from the upper side. A gap 42 is generated 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 arrangement portion 44 wider (large diameter) than the fourth oil passage 43 is formed to be recessed upward. The fourth oil passage 43 is opened in the gasket arrangement portion 44, and the open end thereof is vertically opposed to the second oil passage 17 opened at the second surface portion 16.

  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 periphery 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 a space 46 surrounded by the gasket 45.

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

  In addition, 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 at 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 at which the second oil passage 17 and the fourth oil passage 43 face each other can be changed in the second surface portion 16.

  Therefore, the degree of freedom in changing the connection position of the first oil passage 11 and the third oil passage 33 and the connection position of the second oil passage 17 and the fourth oil passage 43 can be improved. In addition, the opposing portion 23 of the case 21 can be avoided below the member 51 disposed in the case 21, and interference between the member 51 and the opposing portion 23 can be suppressed. Thereby, the upper surface of the valve body 91 and the case are separated in order to avoid interference between the member 95 disposed in the case 92 and the portion where the oil passage 93 of the case 92 is formed. As compared with the configuration in which the butt surface with the lower end surface of 92 is enlarged, the transmission can be miniaturized.

  The second oil passage 17 and the fourth oil passage 43 are separated without abutting each other. The facing portion 23 of the case 21 is provided with an annular gasket 45 surrounding 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 the oil from leaking between the second oil passage 17 and the fourth oil passage 43 (oil leak).

<Modification>
As mentioned above, although one Embodiment of this invention was described, this invention can also be implemented with another form.

  For example, in the above 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 took up the configuration. Not only this but a level | step difference may be formed between the upper body 2 and the lower body 4, and the 1st oil path and the 2nd oil path 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 to form a first oil passage and a second oil passage 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) or a stepped automatic transmission (AT: automatic transmission), or a power split continuously variable transmission. May be A power split type continuously variable transmission includes, for example, a belt type continuously variable transmission mechanism that continuously changes the power by changing the gear ratio, and splits the power into two paths between the input shaft and the output shaft. Transmission that can be transmitted.

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

1: Valve body 11: First oil passage 12: First surface portion 16: Second surface portion 17: Second oil passage 21: Case 33: Third oil passage 43: Fourth oil passage 45: Gasket

Claims (1)

A connection structure of oil passages in a transmission,
A valve body is attached from below to a case forming an outer shell of the transmission,
The upper surface of the valve body has a first surface portion and a second surface portion which are formed in an uneven manner,
The valve body is formed with 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 abuts on the first oil passage and is in communication with the first oil passage, and an open end facing the second oil passage, and is in communication with the second oil passage. A fourth oil passage is formed,
A connection structure of oil passages, provided with an annular gasket surrounding a periphery of the open end of the fourth oil passage, wherein the gasket abuts on the second surface portion.

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