JPH05157161A - Pull-off preventing structure of hydraulic control valve of automatic transmission - Google Patents

Abstract

PURPOSE:To provide pull-off preventing structure wherein structure is simplified and a key is held without needing a space. CONSTITUTION:A key groove 182 extending from the mating surface of a lower body to a spool hole 116 is formed and a key 172 having an expansion part 174 formed so that thickness is made approximately equal to a key groove width T is inserted in a part where the key groove is positioned. The one surface of the key groove 182 is formed such that the opposite surface of the key groove 182 for supporting the plate surface of a key supports the expansion part 174 of the key and the key is prevented from falling in the direction of the axis of a spool hole. Thereby, size being not larger than the size of the spool hole suffices for the size of a seat part being the tip of the key positioned in the spool hole. A need to form a groove throughout the whole periphery of the spool hole to prevent the occurrence of a fall and to lock the seat part, having size larger than a hole size, to the groove is eliminated and there is no need to provide a space for the groove.

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. 14 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. FIG. 15 and FIG. 16 show an example thereof, in which a key hole 33 which crosses the lower body 11 in the thickness direction through substantially the center of the spool hole 18 is formed, 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.

17 and 18 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 control valve as described above, it is necessary to provide a through hole extending over the upper and lower surfaces of the body for the key in FIGS. 15 and 16 to prevent the valve from coming off at the spool hole end. 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. In addition, even in the case of FIGS. 17 and 18, since a groove having a larger diameter 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, it is an object of the present invention to provide a retaining structure for a hydraulic control valve of an automatic transmission, which has a simple structure and requires no space.

[0009]

Therefore, according to the present invention, at the end of the opening of the spool hole of the body of the hydraulic control valve, the key groove that reaches the spool hole from one surface of the body at a substantially right angle to the axis of the spool hole is provided. A key having a seat portion having a width dimension not larger than the spool hole diameter facing the inside of the spool hole is formed in the key groove, and the key is inserted into the key hole. The bulged portion has a thickness substantially the same as the width of the keyway in the axial direction.

[0010]

[Function] By the bulging portion of the key, the play between the key groove and the key in the axial direction of the spool hole is zero or negligible, and the key does not fall in the axial direction of the spool hole without any other means on the body side. , Held at the set position.

[0011]

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 formed by bulging on the lower surface, and solenoid valves 160 and 161 are mounted on the solenoid mounting block 124 so that their axes are 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. With the control valve 100 fixed in the transmission case 50, the counter shaft 5
The protrusion 125 overlaps in the axial direction of the parking pole shaft 60 in the vicinity of the end of the parking pole shaft 60 that supports the parking pole 58 that is engageable with the parking gear 56 attached to the No. 4 vehicle. 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.

On the lower body end surface side of the spool hole, a solenoid valve works as a retainer of the spool hole for a large-diameter built-in valve. This will be described with reference to FIGS. 9 and 10. In the opening of the lower body end surface of the spool hole 114, a key groove 183 reaching the upper surface 180 of the lower body is formed in the upper wall of the spool hole, and a foot extending from the seat portion 194 of the key 192 is formed. 196 is locked in the key groove 183 from the inside of the spool hole.

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 then 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.

One of the other spool holes on the lower body end face side
The retainer 16 is shown in FIGS. 11 and 12. From the upper surface 180 of the lower body 110 to the spool hole 11
A key groove 182 reaching 6 is formed, and a key 172 made of a plate material is inserted from here to support the valve spring 170. 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.

As described above, in this embodiment, the key groove 182 reaching the spool hole 116 from the mating surface of the lower body.
The key 172 is provided with a bulge portion 174 having a thickness substantially equal to the width of the key groove at a portion located inside the key groove.
Since the key is inserted, the one side of the keyway is the key 172
The key surface does not fall in the axial direction of the spool hole 116 because the opposite surface of the key groove supports the bulging portion 174 of the key.

Therefore, the seat portion at the tip of the key located in the spool hole need only have a width dimension that is not larger than the spool hole diameter, and a groove is formed over the entire circumference of the spool hole to prevent it from falling, and the size is made larger than the hole diameter. There is no need to lock the seat and no space is taken for the groove.

Since a small hole 176 is provided in the seat portion of the key, when disassembling it, it can be easily removed by engaging a tool with it and moving the key end partly out of the mating surface. it can. Therefore, it is not necessary to penetrate the key groove over the upper and lower surfaces of the body for pushing out the key, and a groove connecting one mating surface and the spool hole is sufficient.

In addition, the bulging portion of the key is formed in various ways as shown in FIG. (A) of the same figure is made by molding the bulged portion 174 'by pressing or forging from a thick plate material, and is an integral body of one material similar to that of FIG. (B) is another plate material small piece 1 on the main body plate material 173.
75b is adhered to form a bulge. Also (c)
Is a bulging part by covering an end portion of the main body plate material 173 with a U-shaped cap 175c, and (d) is a small plate material piece 17 having a pin.
5d is pushed into an insertion hole formed in the main body plate material 173 and fixed to form a bulging portion. Furthermore, like (e),
A thin plate 175e may be wound around the body plate 173 to form a bulge. In both cases, the portion of the key located in the key groove has a thickness substantially the same as the width of the key groove, and the association between the key groove and the key is zero or very small to prevent the key from collapsing.

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 if the spool hole is provided in either the lower body or the upper body, the groove space around the spool hole is not required.

[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 key groove which reaches the spool hole from one surface of the body is provided. By inserting a key with a bulge formed so that it has a thickness approximately the same as the width of the key groove in the portion that is located inside the groove to receive the valve element, the bulge of the key allows the key groove and the key There is zero or very little play in the axial direction of the spool hole, and the key does not fall in the axial direction of the spool hole without any other means on the body side. This allows
The structure is simple and almost no processing is required to prevent the body from coming off, and the key is held at the set position without taking the space dedicated to 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 diagram showing details of a C portion in FIG.

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

FIG. 11 is a cross-sectional view showing details of an end surface portion of a spool hole.

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

FIG. 13 is a diagram showing a modified example of a key.

FIG. 14 is a view showing a conventional control valve.

FIG. 15 is a diagram showing a conventional retaining structure.

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

FIG. 17 is a view showing another conventional retaining structure.

18 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 100 Control valve 110 Lower body 150 Upper body 112, 114, 116 Spool hole 118 Spool 120 End surface 122 Overhanging portion 124 Solenoid mounting block 125 Protrusion 126, 126 'Casted groove 128 Solenoid valve edge hole 129 Solenoid valve Central hole 130 Separate plate 154 Protrusion 160, 161 Solenoid valve 162, 163 Bracket 170 Valve spring 171 Plug 172 Key 173 Key body 174, 174 'Swelling portion 175b, 175d Plate material small piece 175c Cap 175e Thin plate 176 Small hole 180 Top surface 181 Lower surface 182, 183 Key groove 184 Spool hole wall 192 Key 194 Seat portion 196 Feet 198 Arm 200 Tip portion 202 Holding portion

Claims (2)

[Claims] 1. A key groove is formed at an end of a spool hole opening of a body of a hydraulic control valve, the key groove reaching the spool hole from one surface of the body substantially at right angles to the axis of the spool hole. A key is inserted and arranged with a seat portion having a width dimension not larger than the spool hole diameter facing the spool hole, and the key is located in the key groove and has a key groove width substantially in the axial direction of the spool hole. A retaining structure for a hydraulic control valve of an automatic transmission, which has bulged portions having the same thickness. 2. The one surface of the body is a mating surface to be overlapped with another member, and the key substantially corresponds from the mating surface of the body to a wall facing the opening of the key groove of the spool hole. A structure for preventing the hydraulic control valve of an automatic transmission from coming off, which has a length that is equal to that of the seat and a small hole is provided in the seat portion.