JPH0719663U - Control valve mounting structure for automatic transmission - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent noise and vibration from being transmitted to the automatic transmission casing from the control valve mounted on the automatic transmission casing. [Constitution] The valve bodies 14 and 16 constituting the control valve 12 are attached by bolts 24 in a state of being in close contact with the automatic transmission casing 10. The contact surfaces 20 and 22 are formed on the same plane. The bolts 24 are arranged on the outer circumferences of the valve bodies 14 and 16 and on the central portions of the valve bodies 14 and 16. The control valve 12 is provided with solenoids 32 and 34.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a control valve mounting structure for an automatic transmission.

[0002]

[Prior art]

 As a conventional control valve mounting structure for an automatic transmission, there is one disclosed in Japanese Patent Application Laid-Open No. 61-36541. The control valve shown here consists of two valve bodies, an upper valve body and a lower valve body, and the lower valve body is arranged on the side far from the center line of the automatic transmission casing. The oil passage between the automatic transmission casing side and the control valve side is connected by bringing the lower valve body side into close contact with the automatic transmission casing. In the case of the technology disclosed in this publication, in order to efficiently connect the oil passage in the central part of the lower valve body to the automatic speed changer casing side, a through hole is provided on the upper valve body side, and a portion corresponding to this through hole is provided. The projection of the automatic transmission casing is provided, and the lower surface of the projection is brought into close contact with the lower valve body to connect the oil passage. This is intended to simplify the connection of oil passages.

[0003]

[Problems to be solved by the device]

 However, since the control valve of the above-mentioned conventional technique is fixed to the automatic transmission casing with bolts only on the outer circumference of the valve body, the support rigidity of the control valve is low. For this reason, if a solenoid for electrically controlling hydraulic pressure is installed in this, when the noise and vibration generated when the solenoid is driven are transmitted to the vehicle interior through the control valve and the automatic transmission casing, they are unique to the transmission system. The frequency is low, which is a disadvantage for blocking noise and vibration. That is, since the support rigidity of the control valve is low, the natural frequency of the transmission system is lowered, and a resonance system that amplifies noise and vibration is easily formed. The present invention aims to solve the above problems.

[0004]

[Means for Solving the Problems]

 According to the present invention, the automatic transmission casing and the valve body are brought into close contact with each other on the same plane, and the bolts for mounting the valve body to the automatic transmission casing are arranged not only on the outer periphery of the valve body but also on the central portion. The above problems are solved. That is, in the control valve mounting structure for an automatic transmission according to the present invention, in the first aspect of the present invention, the valve bodies (14, 16) forming the control valve (12) are closely attached to the automatic transmission casing (10). Mounted with bolts (24) in the closed state, the contact surfaces (20, 22) are formed on the same plane, and the bolts (24) are provided on the outer circumference of the valve body (14, 16) and the valve body (14, 16). Centrally located, the control valve (12) is characterized by having solenoids (32, 34). Further, in the second aspect of the present invention, the control valve (12) is constructed by stacking a plurality of valve bodies (14, 16), and these valve bodies (14, 16) pass through bolts ( 26) is attached to the automatic transmission casing (10). The reference numerals in parentheses indicate the corresponding members of the embodiment.

[0005]

[Action]

 In the structure of claim 1, since the valve body constituting the control valve is closely attached to the automatic transmission casing on the same plane, and the bolt is mounted in a state in which the bolt is also arranged in the central portion of the valve body. The support rigidity is high, and the natural frequency of the transmission system can be increased. Therefore, even if the solenoid serving as the vibration source is provided in the control valve, it is difficult to form a resonance system that amplifies the solenoid driving vibration, which is advantageous in blocking noise and vibration. Further, when fixing the central portion of the control valve to the automatic transmission casing with bolts to increase the rigidity of the automatic transmission casing opening, the conventional lower valve body and the automatic transmission casing are brought into close contact with each other. However, if the upper valve body in the central part of the control valve is simply fixed to the automatic transmission casing, the sealing performance of the oil passage connection part will be impaired, so high processing accuracy is required accordingly. In this case, the automatic transmission casing and the valve body are brought into close contact with each other on the same plane, and the oil passage connection part is provided on this close contact surface.Therefore, the valve body of the automatic transmission casing is installed without consideration of processing accuracy. Even if the parts that are in close contact are fixed, the sealing performance of the oil passage connection will not be impaired. Further, according to the second aspect of the present invention, when a plurality of valve bodies are stacked, the weight of the transmission system increases only by mounting and fixing another valve body on the valve body attached to the automatic transmission casing. This lowers the natural frequency, but since the valve body is attached to the automatic transmission casing by the through bolts that penetrate all the valve bodies, it does not reduce the overall rigidity. Since the natural frequency does not decrease, it is advantageous in blocking the transmission of noise and vibration.

[0006]

【Example】

 1 and 2 show an embodiment of the present invention. A control valve 12 is arranged on the lower side of the automatic transmission casing 10. The control valve 12 is composed of an upper valve body 14, a lower valve body 16, and a separate plate 18 interposed therebetween. The control valve 12 is mounted with the mounting surface (contact surface) 20 formed on the upper surface of the upper valve body 14 in close contact with the valve mounting surface (contact surface) 22 formed on the automatic transmission casing 10. There is. Although the upper valve body 14 and the lower valve body 16 are connected to each other by a bolt 24 shown in FIG. 2, they are also fastened together with the automatic transmission casing 10 by a through bolt 26 penetrating them. A strainer 28 is attached to the lower surface side of the lower valve body 16. The control valve 12 is housed in an oil pan 30 attached to the automatic transmission casing 10. It should be noted that solenoids 32 and 34 indicated by imaginary lines are attached to the upper valve body 14. The oil is transferred between the control valve 12 and the automatic transmission casing 10 through the contact surface between the mounting surface 20 of the upper valve body 14 and the valve mounting surface 22 of the automatic transmission casing 10. That is, oil pressure supply oil passages for the oil pump suction passage, discharge passage, clutch / brake, etc. are provided at positions corresponding to the mounting surface 20 and valve mounting surface 22, respectively. Since the mounting surface 20 and the valve mounting surface 22 are on the same plane, there is little processing error and hydraulic sealing is possible without providing a sealing member. Moreover, since all of the oil passages are connected by the mounting surface 20 on the upper surface side of the upper valve body 14, the mating surface side of the upper valve body 14 and the lower valve body 16, that is, the side facing the separate plate 18, An oil passage can be provided over the entire surface, and many valves and oil passages can be arranged in a limited space. Further, as shown in FIG. 2, the through bolts 26 for mounting the control valve 12 on the automatic transmission casing 10 are arranged not only on the outer peripheral portion of the control valve 12 but also on the central portion thereof. The opening side is bridged, and the rigidity of the automatic transmission casing 10 is improved. Since the contact surface between the valve body located near the center line of the automatic transmission casing and the valve body located on the far side can be made wide, the entire control valve can be compactly housed while the valves and oil passages are arranged. The degree of freedom can be secured. Since the valve body located closer to the center line of the automatic transmission casing was brought into close contact with the automatic transmission casing to connect the oil passage, the lower valve body located farther from the center line was brought into close contact with the oil body. In the conventional type in which the passages are connected, there is a predetermined gap between the automatic transmission casing portion having an oil passage inside and the upper valve body adjacent to the automatic transmission casing portion and the wall of each of the automatic transmission casing portion and the upper valve body. The control valve can be downsized by eliminating the need for these spaces, whereas the space for the thickness was required. Further, since it is not necessary to provide a through hole in the upper valve body to connect the lower valve body and a part of the automatic transmission casing, the control valve does not become large in the outer peripheral direction. Furthermore, since the automatic transmission casing and the valve body are in close contact with each other on the same plane, and the oil passage connection part is provided on this close contact surface, the valve arranged on the automatic transmission casing side without considering the processing accuracy. Even if the body is firmly attached, the sealing performance of the oil passage connection will not be impaired. In addition, when fixing the central part of the control valve to the automatic transmission casing with bolts to increase the rigidity of the casing opening, if the conventional lower valve body and casing are closely attached, If a certain upper valve body is simply fixed to the automatic transmission casing, the sealing property of the oil passage connection will be impaired, and high processing accuracy is required accordingly. The valve body located near the line is in close contact with the automatic transmission casing on the same plane, and the oil passage connection part is provided on this close contact surface. Even if the part where the valve body placed close to the line is in close contact is fixed, the sealing performance of the oil passage connection will not be impaired. Therefore, a bolt for increasing the rigidity of the opening portion of the automatic transmission casing can be easily provided in the central portion of the control valve. In this embodiment, the control valve 12 is arranged on the lower side of the automatic transmission casing 10. However, on the contrary, when the control valve 12 is arranged on the upper side of the automatic transmission casing 10 and on the side portion of the automatic transmission casing 10. The present invention can be similarly applied to the case of arrangement.

[0007]

[Effect of device]

 As described above, according to the present invention, the valve body, which is arranged on the side closer to the center line of the automatic transmission casing, is tightly attached to the automatic transmission casing on the same plane. Compared to the case where oil passage connection parts are provided for each, the oil pressure sealability will be affected by processing error even if multiple oil passage connection parts are provided on the adhesion surface on the same plane at any position. Therefore, it is not necessary to provide a seal member, and the degree of freedom in layout of the oil passage connecting portion can be improved. Even if the control valve is provided with a solenoid that serves as a noise source or a vibration source, since the support rigidity for supporting the control valve in the automatic transmission casing is high, it is difficult to form a resonance system that amplifies the solenoid drive vibration, etc. It is advantageous for blocking vibration and vibration. Further, when all the valve bodies are attached to the automatic transmission casing by the through bolts penetrating through them, the supporting rigidity for supporting the control valve on the automatic transmission casing is further increased. Therefore, it is more advantageous in blocking noise and vibration.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an automatic transmission according to an embodiment of the present invention.

FIG. 2 is a view of the control valve seen from the lower side of FIG.

[Explanation of symbols]

 10 Automatic Transmission Casing 12 Control Valve 14 Upper Valve Body 16 Lower Valve Body 20 Mounting Surface (Adhesive Surface) 22 Valve Mounting Surface (Adhesive Surface) 24 Bolt 26 Through Bolt

Claims (2)

[Scope of utility model registration request] 1. A control valve mounting structure for an automatic transmission in which a control valve (12) is mounted in an automatic transmission casing (10), wherein the valve bodies (14, 16) constituting the control valve (12) are The transmission casing (10) is attached to the transmission casing (10) by bolts (24), the contact surfaces (20, 22) are formed on the same plane, and the bolts (24) are attached to the outer circumference of the valve body (14, 16). Also, the control valve (12) is arranged in the center of the valve body (14, 16).
4) A control valve mounting structure for an automatic transmission, characterized in that 2. The control valve (12) is constructed by stacking a plurality of valve bodies (14, 16),
The valve bodies (14, 16) are attached to the automatic transmission casing (10) by means of through bolts (26) extending therethrough.
Control valve mounting structure for the automatic transmission described.