JP2002295654A - Valve body of automatic transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a narrowing of an oil passage in a valve body due to adjacent obstacles. SOLUTION: The valve body 1, formed with an oil passage 10 therein constituting a hydraulic circuit of an automatic transmission and other oil passage constitution member 2 are arranged facing each other. The oil passage 10 is constituted by a groove 10a, formed on the valve body 1 and a groove 20a formed on the other oil passage constitution member 2 and both grooves 10a, 20a section an oil passage laid on the valve body and other oil passage constituting member. Since the oil passage can be arranged, by utilizing a space synthesizing the valve body and other oil passage constitution member, even when the width and the depth of the oil passage groove are restricted in the valve body, securing of the cross section of oil passage is facilitated, by utilizing the opposed space of other oil passage constitution member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve body of an automatic transmission, and more particularly to an oil passage structure of the valve body.

[0002]

2. Description of the Related Art An automatic transmission is provided with a hydraulic control device for controlling a hydraulic servo for operating an engaging element of a torque converter and a gear train associated therewith.
The hydraulic circuit that constitutes the hydraulic control device incorporates various control valves, orifices, filters, and the like, and is built in a block-shaped valve body that connects them through an oil passage. The oil passage in the valve body is composed of a flat groove open on one side of the valve body for ease of machining, while the hydraulic circuit is highly integrated to reduce the occupied area. Because of the three-dimensional arrangement, the valve body is stacked and separated by separating the multiple blocks with a separator plate sandwiched between them, creating a three-dimensional structure. It is communicated with the hole of the formed separator plate.

[0003]

By the way, in the laminated valve body constructed as described above, the valve arrangement is made giving priority to the rationality of the arrangement of the main valves, and furthermore, the oil leakage from the laminated portion is prevented. In order to prevent it, it is fixed to the automatic transmission case with a large number of fastening bolts arranged as evenly as possible over the entire valve body, avoiding the oil passage formation part and the valve arrangement part. There may be an oil passage portion where it is practically difficult to secure the oil passage cross-sectional area.
For example, in a portion where the sliding hole of the valve approaches the bottom side of the groove and the groove or bolt insertion hole adjacent to the side of the groove approaches, the sliding hole of the valve becomes an obstacle and increases the depth of the groove. As a result, the securing of the oil passage cross-sectional area is hindered, and further, the securing of the oil passage cross-sectional area by the increase in the width of the groove with the bolt insertion hole acting as an obstacle is also hindered. Such problems are caused by the rationality of valve arrangement,
The problem cannot be solved unless the arrangement relation is partially corrected at the expense of the uniformity of the bolt arrangement or the whole circuit design is redone.

The present invention has been made in view of such circumstances, and as a result of various considerations regarding the configuration of the oil passage, the conventional arrangement of the oil passage has been described as one in which one oil passage is provided in one valve body. He came to the conclusion that there was a reason why he could not find a solution to what he had been doing with the concept. Accordingly, an object of the present invention is to provide a valve body capable of securing an oil passage cross-sectional area by avoiding the oil passage narrowing due to an obstacle with a simple configuration by eliminating the above-described regulation concept. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a valve body in which an oil passage constituting a hydraulic circuit of an automatic transmission is formed, wherein the valve body comprises a separator plate. In the valve body of the automatic transmission fixed to face the other oil passage forming member with the oil passage interposed therebetween, the oil passage is formed in the valve body, and the groove facing the other oil passage forming member is open. A groove formed on the other oil passage forming member and having an open surface facing the valve body. The two grooves overlap each other at least at a part of the groove width on the facing surface, and extend in the extending direction of the groove. An oil passage continuously overlapping with the oil passage is defined.

Next, the present invention provides a valve body in which an oil passage constituting a hydraulic circuit of an automatic transmission is formed.
In a valve body of an automatic transmission in which the valve body is fixed to face another oil path forming member across a separator plate, an oil path formed in the valve body has a flow path cross-sectional area due to an adjacent obstacle. A parallel oil passage is formed parallel to the narrowed portion to be narrowed, and a parallel oil passage is formed in another oil passage forming member to supplement the flow path cross-sectional area of the narrowed portion.

In the above configuration, the narrowed portion of the oil passage of the valve body and the parallel oil passage of the other oil passage forming member are grooves that are open on the side facing the separator plate, and are formed by openings formed in the separator plate. An integrated oil passage can be configured.

The above configuration is effective when the oil passage is a suction oil passage communicating with an oil pump.

As the obstacle, there is a bolt insertion hole for fastening another oil passage adjacent to the oil passage or a valve body to the automatic transmission case.

[0010]

According to the structure of the first aspect,
Since the oil passages can be arranged by utilizing the combined space of the valve body and the other oil passage forming members facing each other, even if the width and depth of the oil passage groove in the valve body are restricted, other oil passages are required. It is easy to secure the oil passage cross-sectional area by utilizing the facing space of the passage forming member. Moreover, since the oil passage extending over the valve body and the other oil passage forming member is established by overlapping at least a part of their width on the facing surface side,
The position of the oil passage groove between the valve body and other oil passage forming members can be shifted within the range of the groove width, increasing the freedom of oil passage arrangement, and securing the oil passage cross-sectional area in a restricted space. It becomes even easier.

According to the second aspect of the present invention, the oil passages can be arranged by utilizing a space in which the valve body and the other oil passage forming members facing each other are integrated. Even when it is difficult to secure the cross-sectional area of the flow passage, it is possible to secure the cross-sectional area of the oil passage by cooperating with the parallel oil passage using the empty space of another oil passage forming member. In addition, the oil passage of the valve body and the parallel oil passage of the other oil passage forming members do not necessarily have to have the same flow passage shape, so that the degree of freedom of arrangement of the oil passage is increased, and the oil in the restricted space is increased. It becomes easier to secure the road cross-sectional area.

Further, according to the third aspect of the present invention, since the oil passage of the valve body and the parallel oil passage of the other oil passage forming members are both formed by grooves opened on the facing surface side, the structure of the conventional valve body can be improved. It is possible to secure the oil passage cross-sectional area in the same manner as the processing.

According to the configuration of the fourth aspect, it is particularly necessary to reduce the flow resistance as much as possible, so that the oil passage cross-sectional area of the suction oil passage requiring a large cross-sectional area can be easily secured.

Further, according to the configuration of the fifth aspect, it is easy to secure an oil passage cross-sectional area at a position where the oil passages are dense.

According to the configuration of the sixth aspect, it is easy to secure an oil passage sectional area in an oil passage in which the oil passage sectional area is sharply narrowed by being adjacent to the bolt fastening portion.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partial plan view showing a valve body of an automatic transmission to which the present invention is applied. This figure shows the shape of a valve body, which is actually arranged vertically on the front side of an automatic transmission horizontally arranged with respect to the vehicle, as viewed from the front side of the vehicle. The case 2 is defined such that a valve body middle 1 is a front side on the paper surface and another oil passage forming member (in the present embodiment, which is constituted by a transmission case, is referred to as a case in the description of the embodiment) 2 is a rear side. The external shape of the valve body and the oil path fixed to the valve body are shown in a see-through state, the external shape and the oil path indicated by the imaginary line are those of the valve body middle 1, and the external shape and the oil path indicated by the solid line are the case. Shown on the two side.

An oil passage 10 shown by a bold two-dot chain line in the drawing is an oil passage according to the application of the present invention, and this oil passage is connected to a valve body front (not shown, which is located further forward than the valve body middle on the paper). A suction oil passage connecting the drain port of the secondary regulator valve arranged in the valve body and the suction port of the oil pump outside the valve body is formed, and one side is adjacent to the portion passing through the valve body middle 1 Between the other oil passage 11 and the through hole 12 of the valve body fastening bolt, thereby forming a narrowed portion. Therefore, in accordance with the present invention, the suction oil passage 10 is formed between the groove 10a (shown by a two-dot chain line) in the middle of the suction oil passage 10 on the side facing the case 2 and the valve body middle 1 formed in the case 2. Groove with open side (shown by solid line in the figure) 20
a, and the two grooves overlap each other at least on a part of the groove width on the opposing surface, and continuously overlap in the extending direction of the groove to define an oil passage extending between the valve body middle 1 and the case 2. It is configured to be.

FIG. 2 is a cross-sectional view of the suction oil passage 10 taken along the line AA as viewed from below by horizontally cutting the side near the drain port of the secondary regulator valve (the upstream side in the oil flow). In this portion, the suction oil passage 10 has a sufficient groove width and depth, so that the valve body middle 1
It is formed only by the side groove 10a. Therefore, groove 1
The open side of Oa (the lower side in the figure) is covered with a separator plate 3.

FIG. 3 is a view of B downstream of the suction oil passage 10.
3B shows a cross section. This portion is a portion where the adjacent oil passage 11 becomes an obstacle and the groove width starts to narrow, and a groove 20 a forming the parallel oil passage 20 is also formed from this portion on the case 2 side. In this cross section, the groove 20a on the case 2 side is slightly shifted in the groove width direction with respect to the groove 10a on the valve body middle 1 side. This is because the cylinder hole 21 of the hydraulic servo for band brake is close to the bottom side of the groove 20a on the case 2 side.
Is to ensure the depth.

FIG. 4 is a cross-sectional view of the suction oil passage 10 taken along the line CC in FIG. In this part, B-
Although there is no significant change to the B section, from this part,
While the adjacent other oil passage 11 starts to bite into the suction oil passage 10, the bolt passage hole 12 approaches as an obstacle on the opposite side of the other oil passage 11, so that the groove width starts to narrow extremely.

FIG. 5 shows the section of the suction oil passage 10 along the line DD, which is the most narrowed portion. In this portion, the oil passage cross-sectional area is mainly secured by the depths of the grooves 10a and 20a. are doing. After passing through this portion, the suction oil passage 10 reaches a vertical hole portion (shown by hatching in FIG. 1) 10b communicating with the front side of the valve body (not shown), and is expanded again. The cross sections are compared, and the BB section and the C section, which are halfway from the AA section and the DD section, are compared.
Although the oil passage cross-sections of the -C cross section seem to be wide, these cross-sections are portions connecting the groove 10a on the valve body middle 1 side and the groove 20a on the case 2 side, and since the flow path is a bent portion, the flow The cross section of the road is almost constant.

Thus, according to the oil passage configuration of the present embodiment, the oil passage can be arranged by utilizing the combined space of the valve body middle 1 and the case 2 facing each other. Even when the width and depth of 10a are restricted, it is easy to secure the oil passage cross-sectional area by using the facing space of the case 2. In addition, the oil passage extending between the valve body middle 1 and the case 2 is formed by overlapping at least a part of their width on the facing surface side.
It is also possible to displace the positions of 0a and 20a within the range of the groove width, so that the degree of freedom of oil passage arrangement is increased, and it becomes easier to secure the oil passage cross-sectional area in a restricted space.

As described above, for convenience of understanding of the technical idea of the present invention, description has been made based on one embodiment. However, the present invention is not limited to the illustrated embodiment, and the scope of the claims is not limited thereto. Within the scope of the matters described in the claims, various specific configurations can be changed and implemented. For example, the other oil passage forming member may be another valve body laminated with the valve body.

[Brief description of the drawings]

FIG. 1 is a partial plan view showing an oil passage of a valve body of an automatic transmission to which the present invention is applied in a see-through state.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a sectional view taken along the line CC of FIG. 1;

FIG. 5 is a sectional view taken along line DD of FIG. 1;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 valve body middle (valve body) 2 case (other oil passage forming member) 3 separator plate 10 suction oil passage 10 a groove 11 other oil passage 20 parallel oil passage 20 a groove 30 opening

Continued on the front page (72) Inventor Takayuki Kuno 10 Takane, Fujii-machi, Anjo, Aichi Prefecture Inside Aisin AW Co., Ltd. (72) Inventor Masaaki Nishida 10 Takane, Fujii-cho, Anjo, Aichi Aisin Ai Within the Company, Inc. (72) Inventor Masahiro Hayabuchi 10 Takane, Fujii-machi, Anjo-city, Aichi Prefecture F-term within the Aisin AW Co., Ltd. 3H051 AA11 BB10 CC11 FF15 3J552 MA01 NA01 NB01 PA64 QA41B QA42B

Claims (6)

[Claims] 1. A valve body in which an oil passage constituting a hydraulic circuit of an automatic transmission is formed. The valve body is fixed to face another oil passage forming member with a separator plate interposed therebetween. In the valve body of the automatic transmission, the oil passage is formed in the valve body, a groove having an open surface facing the other oil passage forming member, and a groove formed in the other oil passage forming member and facing the valve body. An automatic groove, wherein at least a part of the width of the groove overlaps with each other on the facing surface, and defines an oil passage that continuously overlaps in the extending direction of the groove. Transmission valve body. 2. A valve body in which an oil passage constituting a hydraulic circuit of an automatic transmission is formed, and the valve body is fixed to face another oil passage forming member with a separator plate interposed therebetween. In a valve body of an automatic transmission, an oil passage formed in a valve body is arranged in parallel with a narrowed portion whose flow passage cross-sectional area is narrowed by an adjacent obstacle, and a flow passage of the narrowed portion is formed in another oil passage forming member. A valve body for an automatic transmission, wherein a parallel oil passage that supplements a cross-sectional area is formed. 3. The narrowed portion of the oil passage of the valve body and the parallel oil passage of another oil passage forming member are grooves that are open on the side facing the separator plate, and are integrated by an opening formed in the separator plate. 3. The valve body of the automatic transmission according to claim 2, wherein the valve body constitutes a provided oil passage. 4. The hydraulic control device for an automatic transmission according to claim 1, wherein the oil passage is a suction oil passage communicating with an oil pump. 5. The valve body for an automatic transmission according to claim 2, wherein the obstacle is another oil passage adjacent to the oil passage. 6. The obstacle according to claim 2, wherein the obstacle is a bolt insertion hole for fastening the valve body to the automatic transmission case.
A valve body for an automatic transmission according to any one of claims 5 to 13.