JPH05164228A - Fall-out preventive structure of hydraulic control valve for automatic transmission - Google Patents

Abstract

PURPOSE:To obtain simply structured fall-out preventive structure which retains a key without occupying a large space. CONSTITUTION:A leg 196 of a key 192 is engagingly locked to a key groove 183 provided to an upper wall of a spool hole 114, and an arm 198 which is bent toward the lower bottom side of a lower body is engagingly locked to the outside of a spool hole 114 in an extending manner opposite to the leg together with the solenoid valve fixed by means of a fixing bracket 162 of the solenoid valve arranged in the vicinity of the spool hole 114. This arrangement makes it unnecessary to provide a through hole passing through in the thickness direction of a body or a groove extending over the entire circumference of the spool hole 114, leading to space saving.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic control valve for an automatic transmission, and more particularly to a retaining structure for a spool hole end of a valve incorporated in a body of the automatic transmission.

[0002]

2. Description of the Related Art Shift control of an automatic transmission is performed by controlling a hydraulic pressure supplied to a hydraulic mechanism of each unit by a hydraulic control valve arranged in a transmission case adjacent to a power train rotating element. Be done. FIG. 13 shows a conventional control valve 1 of this kind.
0, showing a lower body 11, a separate plate A 12, an interbody 13, a separate plate B 1.
4, the upper body 15 is sequentially stacked to form a unit.

A hydraulic circuit is formed in each of the lower body 11, the interbody 13, and the upper body 15, and a plurality of valves including a manual valve for hydraulic control are incorporated therein. Reference numeral 16 is a spool of a manual valve, and 17 and 18 are spool holes. A solenoid valve 20 for connecting and disconnecting a predetermined portion of the hydraulic circuit is attached to the interbody 13 with its axis in the vertical direction, and a similar solenoid valve 21 is attached to the lower body 11 from the horizontal direction.

In the built-in valve, except for the manual valve whose spool projects from the body end surface, the spool, plug or spring is prevented from coming off in the spool hole at the opening of the body end surface. 14 and 15 show an example thereof, in which a key hole 33 is formed which passes through the center of the spool hole 18 and crosses the lower body 11 in the thickness direction, and the key 30 is inserted into this key hole to insert the key from the spool hole 18 into the plug 35. It is designed so that the etc. do not pop out.

The key 30 is inserted from the mating surface side of the body, and the hook portion 31 formed on the head portion is housed in the recess 34 formed on the mating surface. In this state, the length of the key 30 is set such that the tip of the key 30 projects to the outer surface of the body so that the key tip does not come off from the key hole 33 even if the key 30 has a dimensional error or the key dances. . At the time of disassembly, the tool is locked to the hook portion 31 and the key is pulled out.

FIGS. 16 and 17 show another retaining method.
A cast-out groove 39 that extends from the mating surface side of the lower body 11 in a direction perpendicular to the axis of the spool hole 18 'and surrounds the entire circumference of the spool hole is formed. A spring seat 37 having a diameter larger than that of the spool hole 18 ′ is inserted into the groove 39. That is, since the groove width is larger than the plate thickness of the spring seat 37, the spring seat 37 is locked to the groove 39 around the spool hole 18 'to prevent the spring seat from collapsing. The spring 40 of the valve is prevented from jumping out.

Such a control valve is required to be compact in order to reduce the size of the automatic transmission as a whole, and the interbody and the upper body may be integrated into an upper body in some cases.

[0008]

However, in the above control valve, in order to prevent the valve from slipping off at the spool hole end, it is necessary to provide a through hole extending over the upper and lower surfaces of the body for the keys in FIGS. 14 and 15. In addition, there is a problem that a recess for receiving the hook needs to be machined, and the tip of the key projects to the outer surface of the body, so that other parts cannot be arranged in the vicinity. Also, in the case of FIGS. 16 and 17, since the groove having a diameter larger than the spool hole is formed only for the spring seat,
It will take up space. As a result, downsizing of the control valve cannot be promoted easily.

Therefore, in view of the above problems, an object of the present invention is to provide a retaining structure for a hydraulic control valve of an automatic transmission, which has a simple structure and requires no space.

[0010]

Therefore, according to the present invention, the seat portion of the key is located in the spool hole at the end portion of the spool hole opening of the body of the hydraulic control valve having the functional member attached to the outer surface, and the spool hole inner wall is formed. A key groove corresponding to a foot extending from the seat portion is provided, and the foot is locked in the key groove, and the key faces the foot, and the key is spooled from the seat portion through an edge of the spool hole. It has an arm extending to the outside of the hole, the arm is locked to the functional member to hold the position of the key, and the seat portion of the key supports the valve element incorporated in the spool hole.

[0011]

[Operation] The foot of the key is locked in the key groove on the inner wall of the spool hole, and the arm is outside the spool hole passing through the edge of the spool hole.
The key is held in the set position by being locked by another functional member attached to the body of the control valve.

[0012]

1 and 2 show an embodiment of the invention applied to an automatic transmission in which a control valve is arranged above a power train. In the transmission case 50, a control valve 100 is installed above the transmission main shaft 52 and the counter shaft 54. The control valve 100 is a lower body 11 with a separate plate interposed.
0 and an upper body 150, and oil passages forming a hydraulic circuit are formed in each of them, spool holes 112, 114, 116 are formed in the lower body 110, and manual valves and other valves are incorporated therein.

The lower body 110 is further provided with a solenoid mounting block 124 bulgingly formed on the lower surface thereof, and solenoid valves 160 and 161 are mounted on the lower body 110 with their axes parallel to the transmission main shaft 52 and the counter shaft 54. Be done. The solenoid valves 160 and 161 are fixed to the solenoid mounting block 124 by bolting brackets 162 and 163 extending from their body walls, respectively.

The solenoid valve attached to the lower surface of the lower body and the oil passage are connected by a casting passage,
For example, solenoid valve 161 and valve spool hole 11
The connection with 6 is shown in FIGS. That is, the spool hole 116 and the solenoid valve 161 have their axes parallel to each other, and the spool hole 116 and the edge portion hole 128 of the solenoid valve are provided in a cast groove 126 provided in a direction substantially perpendicular to these axes. The openings are individually overlapped and communicate with each other. Also, the central hole 129 of the solenoid valve is connected to the oil passage by a cast groove 126 'which also extends to the mating surface.

The spool hole and solenoid valve are
Besides being arranged side by side with each other, they can be arranged on opposite sides of each other with a casting communication path interposed therebetween. Further, it is not limited to casting, and a processed hole may be used.

Further, as shown in FIGS. 5 and 6 which are detailed views of the portion W in FIG. 1, a projection 125 is provided on the shoulder portion of the solenoid mounting block 124 of the lower body 110. On the other hand, a forked boss 62 having an arm A63 and an arm B64 extends from the inner wall of the transmission case 50, and penetrates the arm A63 to form an arm B6.
The parking pole 58 is supported by the parking pole shaft 60 inserted into the bag hole 65 of No. 4, and the parking pole 58 is moved to the arm A,
It is arranged between B. The parking pole 58 is rotatable around a parking pole shaft 60 and is engageable with a parking gear 56 attached to the counter shaft 54.

When the control valve 100 is fixed at the set position in the transmission case 50, the solenoid mounting block 1 of the lower body thereof is provided.
24 The projection 125 on the shoulder portion is used for the parking pole shaft 6
It is located near the end of the arm A on the side of 0 and overlaps with the extension of the parking pole shaft in the pulling direction. For this reason, the parking pole shaft 60 is held in the regular position without any special retaining means.

In the vicinity B where the manual valve faces, as shown in FIG. 7 showing the mating surfaces sandwiching the separate plates of the lower body and the upper body, the reference outer shape of the upper body 150 is the oil formed therein. Due to the need for the passage 152, the spool 118 of the manual valve
End surface 12 on the reference outline of the lower body 110 into and out of which
It has a protruding portion 154 protruding more than zero.

The lower body 110 has a spool hole 112.
As shown in FIG. 8, the protruding portion 154 of the upper body 150, which has a thickness h smaller than the reference thickness H of the lower body 110 and has an outer shape corresponding to the outer shape, avoids the hole diameter of
Are provided in a flat shape, the upper surface 180 as a mating surface is extended, and the protruding portion 154 is received with the separate plate 130 interposed therebetween.

At the end face side of the lower body of the spool hole, the valve spring loaded in the lower body is prevented from coming off. 9 and 10 show the details thereof. A key groove 182 reaching the spool hole 116 from the upper surface 180 of the lower body 110 is formed, and a key 172 made of a plate material is inserted from here to support the valve spring 170. There is. The key 172 has a length substantially corresponding to the upper surface 180 of the lower body penetrating the spool hole wall opening of the key groove 182 to the spool hole wall 184 facing the opening, and the portion corresponding to the spool hole 116 is the spool. It has a width that is not larger than the hole diameter.

A bulging portion 174 is formed in a portion of the key 172 located inside the key groove 182. Bulge 174
Is substantially the same as the width T of the key groove 182 as viewed in the axial direction of the spool hole 116. A small hole 176 is provided near the center of the portion corresponding to the spool hole 116. The key 172 inserted in the key groove 182 is
The separate plate 130 and the upper body 150 do not come out. When disassembling the valve, the tool is locked in the small hole 176 and the key 172 is attached to the lower body upper surface 180.
Move it so that it partially protrudes, and then pull it out from the top side.

With respect to other large-diameter built-in valves, solenoid valves act as retainers for the spool holes. This will be described with reference to FIGS. 11 and 12. At the opening of the lower body end surface of the spool hole 114, the keyway 1 that reaches the upper surface 180 of the lower body at the spool hole upper wall.
83 is formed, and the foot 196 extending from the seat portion 194 of the key 192 is provided with a key groove 183 from the inside of the spool hole.
Is locked to.

The arm 198, which is bent outward from the spool hole from the edge of the seat portion 194 facing the foot 196, passes through the spool hole edge, and is folded back onto the lower surface 181 along the lower body edge, is seated again. A tip portion 200 parallel to the portion 194 is locked by a holding portion 202 formed on a bracket 162 of the solenoid valve. As a result, the key 192 is restricted so that it cannot be rotationally displaced in the pulling-out direction around the foot 196 as the center of rotation. The key 192 receives a plug 171 or a valve element such as a spool or a valve spring at its seat portion 194 to prevent the seat 194 from coming off.

As described above, in this embodiment, the axis of the solenoid valve is parallel to the built-in valve and also parallel to the power train rotation axis such as the transmission main shaft and the counter shaft. Has a low overhang and is located near its built-in valve to communicate without interfering with the powertrain.

Then, the foot of the key 192 is locked in the key groove 183 provided on the upper surface of the lower body of the spool hole 114, that is, on the upper wall of the spool hole 114. The arm 198 is locked together with the solenoid valve by a solenoid valve fixing bracket 162 arranged near the spool hole. As a result, it is not necessary to form a through hole or a concave portion that traverses the body in the thickness direction, and it is not necessary to provide a groove around the entire circumference of the spool hole, and therefore no space is required.

Although the embodiment has been described with respect to the control valve arranged above the power train, the present invention is not limited to this, and the control valve is also arranged below the power train. Even when the solenoid valve or the built-in valve is attached to either the lower body or the upper body, the effect of reducing the machining around the spool hole and not requiring space can be obtained. Further, the key groove does not need to penetrate the wall of the spool hole, and it is sufficient if the key groove has a depth for receiving the foot of the key.

[0027]

As described above, according to the present invention, in the retainer for preventing the valve element from falling out of the spool hole formed in the body of the control valve, the foot and the arm extending oppositely from the seat portion receiving the valve element. Use a key with a key to lock the foot of the key in the key groove of the inner wall of the spool hole, and the arm extends to the outside of the hole through the edge of the spool hole so that it can be locked by other functional members attached to the body. Therefore, the structure is simple and almost no processing is required for the body to prevent the key from coming off, and the key is held at the set position without taking a space dedicated to preventing the key from coming off.

[Brief description of drawings]

FIG. 1 is a partial sectional front view showing an embodiment of the invention.

FIG. 2 is a bottom view of the control valve taken along the line AA of FIG.

FIG. 3 is a sectional view showing a connection between a solenoid valve and a spool hole.

FIG. 4 is a sectional view taken along line GG in FIG.

5 is a diagram showing details of a W portion in FIG.

6 is a sectional view taken along line XX of FIG.

FIG. 7 is a diagram showing a mating surface of a lower body and an upper body in a B portion of FIG.

8 is a cross-sectional view taken along the line DD of FIG.

FIG. 9 is a cross-sectional view showing details of an end surface portion of a spool hole.

10 is a sectional view taken along line EE of FIG.

FIG. 11 is a diagram showing details of a C portion in FIG.

12 is a sectional view taken along line FF of FIG.

FIG. 13 is a view showing a conventional control valve.

FIG. 14 is a diagram showing a conventional retaining structure.

15 is a sectional view taken along line KK of FIG.

FIG. 16 is a view showing another conventional retaining structure.

FIG. 17 is a sectional view taken along line LL in FIG.

[Explanation of symbols]

 10 Control Valve 11 Lower Body 13 Interbody 15 Upper Body 16 Spool 17, 18, 18 'Spool Hole 20, 21 Solenoid Valve 25 Power Train 30 Key 31 Hook Part 33 Key Hole 34 Recess 35 Plug 37 Spring Seat 39 Groove 40 Valve Spring 50 Transmission case 52 Transmission main shaft 54 Counter shaft 56 Parking gear 58 Parking pole 60 Parking pole shaft 62 Boss 63 Arm A 64 Arm B 65 Blind hole 100 Control valve 110 Lower body 150 Upper body 112, 114, 116 Spool hole 118 Spool 120 End surface 122 Overhanging part 124 Solenoid mounting block 125 Protrusions 126, 126 'Cast-out groove 128 Edge hole of solenoid valve 129 Central hole of solenoid valve 130 Separate plate 154 Projection 160, 161 Solenoid valve 162, 163 Bracket 170 Valve spring 171 Plug 172 Key 174 Bulging portion 176 Small hole 180 Upper surface 181 Lower surface 182, 183 Key groove 184 Spool hole wall 192 Key 194 Seat portion 196 Legs 198 Arm 200 Tip portion 202 Holding portion

Claims (2)

[Claims] 1. A seat portion of a key is located in a spool hole at an end portion of a spool hole opening of a body of a hydraulic control valve having a functional member attached to an outer surface thereof, and a key corresponding to a foot extending from the seat portion on an inner wall of the spool hole. A key groove is provided, the foot is locked in the key groove, and the key has an arm that faces the foot and extends from the seat portion to the outside of the spool hole through an edge of the spool hole; A hydraulic pressure for an automatic transmission characterized in that an arm is locked to the functional member to hold the position of the key, and a seat portion of the key is configured to support a valve element incorporated in the spool hole. Control valve retaining structure. 2. The functional member is a solenoid valve, and an end portion of the arm is locked to a bracket fixed to the body and extending from a body wall of the solenoid valve. The structure for retaining the hydraulic control valve of the automatic transmission described above.