JP2983736B2 - Retaining structure of hydraulic control valve for automatic transmission - Google Patents

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 structure for preventing a valve incorporated in the body of the hydraulic control valve from coming off at a spool hole end.

[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 disposed adjacent to a power train rotating element in a transmission case. It is. FIG. 14 shows a conventional control valve 1 of this type.
0 shows an example of the lower body 11, the separate plate A12, the interbody 13, and the separate plate B1.
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. Reference numeral 16 denotes a manual valve spool, and reference numerals 17 and 18 denote spool holes. A solenoid valve 20 for connecting and disconnecting a predetermined portion of the hydraulic circuit is mounted on the interbody 13 with a shaft extending vertically, and a similar solenoid valve 21 is mounted on the lower body 11 from the left and right.

[0004] Except for the manual valve whose spool protrudes from the end face of the body, the built-in valve is provided with a spool, a plug or a spring in the spool hole at the opening of the end face of the body to prevent the spool from coming off. FIGS. 15 and 16 show an example in which a key hole 33 is formed through the center of the spool hole 18 and crosses the lower body 11 in the thickness direction. The key 30 is inserted into the key hole and the plug 35 is inserted through the spool hole 18. Etc. do not pop out.

[0005] The key 30 is inserted from the mating surface side of the body, and the hook portion 31 formed on the head fits into the concave portion 34 formed on the mating surface. In this state, the length of the key 30 is set such that the tip protrudes to the outer surface of the body so that the tip of the key does not fall out of the key hole 33 even when the key 30 has a dimensional error or the key dances. . At the time of disassembly, the key is pulled out by locking the tool to the hook portion 31.

FIGS. 17 and 18 show another retaining method.
A cast groove 39 extending from the mating surface of the lower body 11 in a direction perpendicular to the axis of the spool hole 18 ′ and extending around the entire circumference of the spool hole is formed. A spring seat 37 having a tip whose diameter is larger than the diameter of the spool hole 18 ′ is inserted into the groove 39. That is, since the groove width is large relative to the plate thickness of the spring seat 37, the spring seat 37 is locked in the groove 39 around the spool hole 18 'in order to prevent the spring seat from falling down. 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 entire automatic transmission. In some cases, the inter body and the upper body may be formed as an integrated upper body.

[0008]

However, in the above control valve, it is necessary to provide a through hole extending over the upper and lower surfaces of the body for the key in FIGS. In addition to this, there is a problem that a concave portion for receiving the hook needs to be processed, and since the tip of the key projects to the outer surface of the body, other components cannot be arranged in the vicinity of this. 17 and 18, since a groove having a diameter larger than that of the spool hole is formed exclusively for the spring seat,
You will take up space. As a result, the size of the control valve cannot be easily reduced. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a structure for preventing a hydraulic control valve of an automatic transmission from falling out, which is simple in structure and requires no space in view of the above problems.

[0009]

According to the present invention, there is provided a hydraulic control valve, wherein a key groove reaching the spool hole from one surface of the body at a substantially right angle to the axis of the spool hole is provided at an opening end of the spool hole of the body of the hydraulic control valve. A key having a sheet portion having a width dimension not larger than the spool hole diameter facing the inside of the spool hole is inserted and arranged in the key groove, and the key is provided in a portion located in the key groove. The bulge had a thickness substantially the same as the keyway width in the axial direction.

[0010]

[Function] The swelling of the key causes no or little axial play between the key groove and the key in the axial direction of the spool hole, so that the key does not fall in the axial direction of the spool hole even if no other means is provided on the body side. , Held in the set position.

[0011]

1 and 2 show an embodiment of the present 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 provided above the transmission main shaft 52 and the counter shaft 54. The control valve 100 has a lower body 11 sandwiching a separate plate.
0 and an upper body 150, each of which has an oil passage forming a hydraulic circuit, and the lower body 110 has spool holes 112, 114, 116 formed therein, and a manual valve and other valves are respectively incorporated therein.

The lower body 110 is further provided with a solenoid mounting block 124 formed by swelling on the lower surface, and solenoid valves 160 and 161 are mounted on the lower body 110 so that their axes are parallel to the transmission main shaft 52 and the counter shaft 54. Can be 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.

[0013] The solenoid valve and the oil passage mounted on the lower surface of the lower body are connected by a cast passage.
For example, the solenoid valve 161 and the valve spool hole 11
The connection to 6 is shown in FIGS. That is, the axis of the spool hole 116 and the solenoid valve 161 are parallel to each other, and the spool hole 116 and the edge hole 128 of the solenoid valve are formed 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, a 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 the solenoid valve are
In addition to being arranged side by side with each other, they may be arranged on the opposite sides to each other with the communicating passage of the blank. In addition, not only the casting but also a processing hole may be used.

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 of the solenoid mounting block 124 of the lower body 110. When the control valve 100 is fixed in the transmission case 50, the counter shaft 5
Near the end of the parking pole shaft 60 that supports the parking pawl 58 that can be engaged with the parking gear 56 attached to the fourth gear 4, the projection 125 overlaps the parking pole shaft 60 in the axial direction. For this reason, the parking pole shaft 60 is held at the regular position without any other special stopper.

In a portion B near the manual valve, as shown in FIG. 7 showing a mating surface sandwiching the separate plate of the lower body and the upper body, the reference outer shape of the upper body 150 is determined by the oil formed therein. Because of the need for passage 152, manual valve spool 118
End face 12 on the reference outline of lower body 110 through which
It has a projection 154 projecting beyond zero.

The lower body 110 has a spool hole 112.
8, the overhang portion 122 having a thickness h smaller than the reference thickness H of the lower body 110 and an outer shape corresponding to the protruding portion 154 of the upper body 150 as shown in FIG.
Are provided in a flat shape, the upper surface 180 serving as a mating surface is extended, and receives the protruding portion 154 with the separate plate 130 interposed therebetween.

On the side of the lower body end face side of the spool hole, for a large-diameter built-in valve, a solenoid valve functions as a stopper for the spool hole to come off. This will be described with reference to FIGS. 9 and 10. At the opening of the lower body end face 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 the 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 that is bent from the edge of the seat portion 194 facing the foot 196 to the outside of the spool hole, passes through the edge of the spool hole, and is folded back on the lower surface 181 along the edge of the lower body again, is seated again. At a distal end portion 200 parallel to the portion 194, it 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 as not to be pivotally displaced in the pull-out direction about the foot 196 as the pivot center. The key 192 receives a plug 171 or a valve element such as a spool or a valve spring in its seat portion 194 to prevent the key 192 from coming off.

One of the other spool holes on the end surface side of the lower body
16 and 17 are shown in FIGS. Spool hole 11 from upper surface 180 of lower body 110
A key groove 182 reaching 6 is formed, from which a key 172 made of a plate material is inserted to support the valve spring 170. The key 172 has a length substantially corresponding to a portion extending from the upper surface 180 of the lower body to the spool hole wall 184 which penetrates the spool hole wall opening of the key groove 182 and faces the opening. It has a width not larger than the hole diameter.

A bulging portion 174 is formed in a portion of the key 172 located in the key groove 182. Bulge 174
Is substantially the same as the width T of the spool hole 116 of the key groove 182 as viewed in the axial direction. A small hole 176 is provided near the center of the portion corresponding to the spool hole 116. The key 172 inserted into the key groove 182
Since the separate plate 130 and the upper body 150 are provided, they 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.
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.
A key 172 in which a bulging portion 174 is formed in a portion located in the key groove so as to have substantially the same thickness as the key groove width.
, So one side of the keyway is key 172
And the opposite surface of the key groove supports the bulging portion 174 of the key, so that the key does not fall in the axial direction of the spool hole 116.

For this reason, the sheet portion at the tip of the key located in the spool hole needs to have a width not larger than the diameter of the spool hole, and a groove is formed over the entire periphery of the spool hole to prevent the key from falling down, and the groove is made larger than the hole diameter there. There is no need to lock the seat, and no space is required for the groove.

Since a small hole 176 is provided in the sheet portion of the key, when disassembling, a tool can be engaged with the small hole and moved until the end of the key partially comes out of the mating surface. it can. Therefore, there is no need 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.

The bulging portion of the key can be formed in various modes as shown in FIG. (A) of this figure is formed by forming a bulged portion 174 'from a thick plate material by pressing or forging, and is an integrated material of the same material as that shown in FIG. (B) shows another plate material small piece 1 on the main body plate material 173.
75b is bonded to form a bulging portion. (C)
Is a U-shaped cap 175c over an end of the main body plate 173 to form a bulging portion, and (d) is a plate material piece 17 having a pin.
5d is pressed into an insertion hole formed in the main body plate member 173 and fixed to form a bulging portion. Furthermore, as in (e),
The thin plate 175e may be wound around the main body plate member 173 to form a bulging portion. In any case, the portion of the key located in the key groove has substantially the same thickness as the width of the key groove, and the asobi between the key groove and the key is zero or small, thereby preventing the key from falling.

Although the embodiment has been described with reference to the control valve disposed above the power train, the present invention is not limited to this, and may be applied to a control valve disposed below the power train. And, regardless of whether the spool hole is provided in the lower body or the upper body, the effect that the space for the groove around the spool hole becomes unnecessary is obtained.

[0027]

As described above, according to the present invention, a key groove is provided from the one surface of the body to the spool hole to prevent the valve element from falling off from the spool hole formed in the body of the control valve. A key having a bulging portion formed so as to have approximately the same thickness as the width of the key groove is inserted into a portion located in the groove so as to receive the valve element. The asobi in the axial direction of the spool hole between them becomes zero or small, and the key does not fall in the axial direction of the spool hole even if no other means is applied to the body side. This allows
The key is held in the set position with a simple structure, requiring almost no processing for retaining the body, and without taking up a dedicated space for retaining.

[Brief description of the drawings]

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

FIG. 2 is a bottom view of the control valve as viewed from the direction of arrows AA in FIG. 1;

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

FIG. 4 is a sectional view taken along line GG of FIG. 3;

FIG. 5 is a diagram showing details of a portion W in FIG. 1;

FIG. 6 is a sectional view taken along line XX of FIG. 5;

FIG. 7 is a view showing a mating surface of a lower body and an upper body in a portion B of FIG. 1;

8 is a sectional view taken along the line DD of FIG. 7;

FIG. 9 is a diagram showing details of a portion C in FIG. 1;

FIG. 10 is a sectional view taken along line FF of FIG. 9;

FIG. 11 is a sectional view showing details of an end face of a spool hole.

FIG. 12 is a sectional view taken along the line EE of FIG. 11;

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 view showing a conventional retaining structure.

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

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

18 is a sectional view taken along line LL of FIG.

[Explanation of symbols]

 DESCRIPTION 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 Depression 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 face 122 Overhang 124 Solenoid mounting block 125 Projection 126, 126 '' Cast-in groove 128 Solenoid valve edge hole 129 Solenoid valve Center hole 130B Separate plate 154 Projecting portion 160, 161 Solenoid valve 162, 163 Bracket 170 Valve spring 171 Plug 172 Key 173 Key body 174, 174 'Swelling portion 175b, 175d Small plate material 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 part 196 Foot 198 Arm 200 Tip part 202 Holding part

Claims (2)

(57) [Claims] A key groove reaching the spool hole is formed substantially at a right angle from one surface of the body to a shaft of the spool hole at an opening end of a spool hole of the body of the hydraulic control valve. A key having a sheet portion having a width dimension not larger than the spool hole diameter facing the inside of the spool hole is inserted and arranged, and the key is provided at a portion located in the key groove, substantially the same as the key groove width in the axial direction of the spool hole. A structure for retaining a hydraulic control valve of an automatic transmission, characterized in that the structure has bulging portions of the same thickness. 2. The one surface of the body is a mating surface that is overlapped with another member, and the key substantially corresponds from a mating surface of the body to a wall of the spool hole facing the opening of the key groove. and has a length of, claim 1 Symbol, characterized in that the said seat portion is provided with a small hole
The structure of retaining the hydraulic control valve of the onboard automatic transmission.