JP5251335B2 - Valve body - Google Patents

Description

  The present invention relates to a valve body that is provided in a hydraulic control device of an automatic transmission and is manufactured through a casting process and a machining process, and in particular, a hole that opens in a direction perpendicular to the opening direction of the valve hole at a portion adjacent to the valve hole. The present invention relates to a valve body having

  In the valve body of the hydraulic control device for an automatic transmission described in Patent Document 1, an upper valve body is disposed on the upper side of the lower valve body, and a cover is disposed on the lower side of the lower valve body. Fastened and integrated. An oil passage including a valve hole (valve hole) and a bolt insertion hole are formed in the lower valve body. The upper valve body has an oil passage including a valve hole and a bolt screw hole corresponding to the bolt insertion hole, and a screw hole coaxial with the bolt screw hole.

The solenoid valve is fitted into the valve hole of the upper valve body, is prevented from rotating and coming off by the bracket, and is fixed to the upper valve body by a fixing bolt screwed into the screw hole via the bracket. Thus, since the bolt screw hole and the screw hole are formed coaxially, space can be saved as compared with the case where both are formed separately, and the valve body can be downsized.
JP-A-5-231524 (paragraphs [0008], [0009], [0014], FIG. 1)

  In general, a valve body is formed with a pilot hole or oil passage by casting, and a valve hole or a positioning bolt that requires accuracy is formed by machining or the like. In the valve body described in Patent Document 1, the valve hole of the upper valve body, the bolt screw hole, and the screw hole are holes formed by processing, but since both are arranged close to each other, the part is cast. It tends to be thick in the state of the coarse material immediately after. For this reason, a cast hole is likely to be generated in the thick part, and the cast hole may appear on the inner peripheral surface after the processing of each hole, which may reduce the valve function. In order to eliminate this point, the valve hole, bolt screw hole and screw hole should be arranged as far apart as possible to form a cast hole during casting. This hinders the miniaturization of the valve body.

  An object of the present invention is to provide a valve body capable of preventing the formation of a cast hole and achieving a reduction in size and weight.

In order to solve the above-mentioned problem, the structural feature of the invention according to claim 1 is that a valve body provided in a hydraulic control device for an automatic transmission has a valve hole and the valve hole adjacent to the valve hole. opened in the direction perpendicular to the opening direction of the hole, perpendicular to the hole punching cast having a bottom, possess a machining hole penetrating the bottom portion, the opening direction of the valve hole the cast hole is across the bottom It is formed so as to open in both directions .

The structural feature of the invention according to claim 2 is that in claim 1 , when viewed from the opening direction of the valve hole, a perpendicular line extending from the axis of the valve hole to the axis of the core hole Arranging the bottom so that the intersection is located within the bottom.

According to a third aspect of the present invention, in the first aspect , the valve body has a structure divided into a plurality of bodies, and the processing hole is positioned by fastening between the combined bodies. The positioning fastening means is a hole through which the positioning fastening means is inserted.

According to a fourth aspect of the present invention, there is provided a structural feature of the invention according to the second aspect , wherein the valve body includes a rear body having a minimum area when viewed from the opening direction of the cast hole and a middle area having the valve hole. It is divided into a body and a front body having the largest area, the positioning fastening means is disposed on a diagonal line of the rear body, and the cast hole is formed in the middle body.

According to a fifth aspect of the present invention, there is provided a structural feature according to any one of the first to fourth aspects, wherein the key groove into which the key for preventing the valve from coming off from the valve hole is inserted is an end of the valve hole. It is formed in the vicinity and the keyway is formed so as to be connected to the cast hole.

According to the invention according to claim 1 configured as described above, when a machining hole that opens in a direction perpendicular to the opening direction of the valve hole is machined by cutting or the like in a portion adjacent to the valve hole, roughening immediately after casting is performed. There is a possibility that the part in the material state becomes thick and a cast hole may be generated. However, since a cast hole having a bottom portion is formed in the part, the part becomes only a thin bottom part and the formation of the cast hole is generated. Can be suppressed. Therefore, it is not appearing on the inner circumferential surface even cast nest is processed by cutting or the like the valve hole with processed by cutting or the like machining holes in the bottom, it has a name that impair valve function.
And the valve hole processed by cutting etc. and the processing hole can be arranged closer. That is, since the cast hole is formed by pulling out the protruded cast pin, the cast pin needs to be tapered, that is, the diameter of the core of the cast pin needs to be larger than the diameter of the tip of the cast pin. Since the size of the bottom determined by the diameter of the core is fixed, the diameter of the base of the core pin varies depending on the depth of the core hole. In other words, when the casting hole is formed so as to open in both directions in a direction perpendicular to the opening direction of the valve hole with the bottom portion interposed therebetween, the depth of each casting hole can be reduced. The root diameter can be made smaller than the core diameter of the core pin when the core hole is formed on one side of the bottom. For this reason, there is no need for a wide space for forming a cast hole between the valve hole and the machining hole, and the two can be arranged closer to each other, so that the valve body can be further reduced in size and weight.

In the invention according to claim 2 configured as described above, the casting hole is formed by pulling out the protruding casting pin as described above. Therefore, the casting pin has a tapered shape, that is, the core diameter of the casting pin. Needs to be larger than the diameter of the tip of the core pin. Since the size of the bottom determined by the diameter of the processed hole is constant, the base diameter of the core pin varies depending on the position where the core hole is formed, that is, the depth of the core hole. Therefore, by setting the shaft center and the bottom of the valve hole to the same position, the valve hole and the cast hole can be arranged closer to each other without further interference, so that the valve body can be further reduced in size and weight.

In the invention according to claim 3 configured as described above, in order to fasten and position the combined body with high accuracy, it is necessary to improve the accuracy of the processing hole through which the positioning fastening means is inserted. Since the hole forming part is a cast hole leaving the bottom part, the bottom part is a thin part. For this reason, a highly accurate machining hole can be easily formed in the bottom, and the machining cost of the valve body can be reduced.

In the invention according to claim 4 configured as described above, since the positioning fastening means determines the fastening position according to the smallest rear body, in the middle body, the positioning fastening means has a space between the valve hole and the valve hole. To penetrate. Even in that case, if the core hole with the bottom is formed in the middle body, the valve body is smaller and lighter than when the hole is formed between the valve hole and the hole through which the positioning fastening means is inserted. It is possible to prevent the formation of a cast hole while making it.

In the invention according to claim 5 configured as described above, since it is not necessary to provide a partition wall between the cast part and the key groove, the valve hole and the processing hole can be arranged closer to each other, so that the occupied space of both can be further reduced. Thus, the valve body can be further reduced in size and weight.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing a valve body according to an embodiment of the present invention.
The valve body 1 is provided in a hydraulic control device that controls an automatic transmission of a vehicle. The body is divided into a middle body 2, a rear body 3, and a front body 4, and the rear body 3 and the front body 4 are arranged on both sides of the middle body 2 via separators 5 and 6, respectively. The bodies 2, 3, 4 and the separators 5, 6 are fastened and positioned by positioning bolts 7 that are one of positioning fastening means, and are fastened and fixed by fixing bolts 8 </ b> A and 8 </ b> B to be integrated.

  The middle body 2 is formed with an oil passage 21, valve holes 22A, 22B, 22C, positioning bolt holes 23, fixing bolt insertion holes 24A, 24B, and the like. The rear body 3 is formed with an oil passage 31, a positioning bolt hole 33, a fixing bolt insertion hole 34A, and the like. The front body 4 is formed with an oil passage 41, positioning bolt fastening holes 43, fixing bolt fastening holes 44A and 44B, and the like. In this example, the front body 4, the middle body 2, and the rear body 3 are arranged so that the area of the plane parallel to the opening direction of the valve holes 22A, 22B, and 22C (the area when viewed from the left in the drawing) is reduced in this order. Is formed.

  Although not shown in the drawings, the valves that are inserted into the valve holes 22A and the like include valves having spools such as a primary regulator valve and a secondary regulator valve, and valves including balls and springs such as a check valve and a pressure relief valve. .

  The separators 5 and 6 are formed with positioning bolt holes 53 and 63, fixing bolt insertion holes 54A, 54B, and 64B. Gaskets (not shown) are attached to both surfaces of the separators 5 and 6 (excluding the holes 53, 63, 54A, 54B, and 64B), and the valve holes 22A and the like are positioned from the oil passages 21, 31, and 41, respectively. Oil leakage to the bolt holes 23 and the like is prevented.

  Since the positioning bolt 7 needs to fasten and position the combined rear body 3, separator 5, middle body 2, separator 6 and front body 4, the plane area parallel to the opening direction of the valve holes 22A, 22B, and 22C is large. It is arranged according to the smallest rear body 3. Since the fastening position of the positioning bolt 7 is determined according to the rear body 3 having the smallest planar area in this way, in the middle body 2, the positioning bolt 7 passes through the space between the valve hole 22A and the valve hole 22B, for example. As a result, such processed parts are densely packed. Even in such a case, the valve body 1 is formed by forming a cast hole 91, which will be described later in detail, in the middle body 2 as compared with the case where the cast hole is formed between the valve hole and the hole through which the positioning bolt is inserted. It is possible to prevent the formation of a cast hole while reducing the size and weight.

  In order to effectively suppress the displacement of the combined rear body 3 and the like, at least two positioning bolts 7 are required. For this reason, the fastening positions of the positioning bolts 7 are arranged at diagonal positions of the rear body 3 (positions P1 and P2 in the plan view of the middle body 2 of the cast coarse material shown in FIG. 2). According to such an arrangement, the displacement of the combined rear body 3 and the like can be effectively suppressed, and the combined rear body 3 and the like are fastened and positioned with high accuracy by the minimum two positioning bolts 7. can do. Note that three or more positioning bolts 7 may be arranged.

  The positioning bolt 7 is inserted from the positioning bolt hole 33 of the rear body 3 and passed through the positioning bolt hole 53 of the separator 5, the positioning bolt hole 23 of the middle body 2, and the positioning bolt hole 63 of the separator 6. The front body 4 is screwed into a positioning bolt fastening hole 43. The positioning bolt holes 33, 53, and 63 are all formed slightly larger in diameter than the shaft diameter so that a predetermined fitting clearance is generated between the positioning bolt holes 33 and 53 and the shaft of the positioning bolt 7.

  Although the positioning bolt hole 23 is a characteristic portion of the present invention and will be described in detail later, a bottom portion 92 having a diameter larger than the shaft diameter is formed so that a gap is generated between the positioning bolt hole 23 and the shaft of the positioning bolt 7. A cast hole 91 and a bolt hole 23 a processed so as to penetrate the bottom portion 92 are formed. That is, a cast hole 91 that opens in both directions with a thin bottom portion 92 interposed therebetween is formed in the cast coarse material of the middle body 2 before processing. The processed middle body 2 is formed with a bolt hole 23 a in the bottom 92. The bolt hole 23a is formed to have a diameter slightly larger than the shaft diameter so that a predetermined fitting clearance is generated between the bolt hole 23a and the shaft of the positioning bolt 7. The positioning bolt fastening hole 43 is formed with a female screw that can be screwed with the male screw of the positioning bolt 7.

  The fixing bolt 8A fastens and fixes the combined rear body 3, separator 5, middle body 2, separator 6 and front body 4, and the fixing bolt 8B includes the combined middle body 2, separator 6 and front. Since the body 4 needs to be fastened and fixed, it is arranged so as to have a substantially lattice shape in the plane of each of the bodies 2, 3, 4; . FIG. 2 shows the fixing bolt insertion holes 24 arranged in a substantially lattice shape in the plane of the middle body 2. According to such an arrangement, the combined middle body 2 and the like can be firmly fastened and fixed by the minimum necessary fixing bolts 8A and 8B.

  The fixing bolt 8A is inserted from the fixing bolt insertion hole 34A of the rear body 3, and includes the fixing bolt insertion hole 54A of the separator 5, the fixing bolt insertion hole 24A of the middle body 2, and the fixing bolt insertion hole 64A of the separator 6. It is threaded into the fixing bolt fastening hole 44 </ b> A of the front body 4. The fixing bolt 8B is inserted from the fixing bolt insertion hole 24B of the middle body 2, passed through the fixing bolt insertion hole 64B of the separator 6, and screwed into the fixing bolt fastening hole 44B of the front body 4. The fixing bolt insertion holes 24A, 24B, 34A, 54A, 64A, and 64B are formed with a diameter slightly larger than the shaft diameter so that a gap is generated between the fixing bolts 8A and 8B. It is a hole. In the fixing bolt fastening holes 44A and 44B, female screws that can be screwed with the male screws of the fixing bolts 8A and 8B are formed.

  The positioning bolt hole 23 which is a characteristic part of the valve body 1 having such a configuration will be described. The valve body 1 is formed with a pilot hole such as an oil passage 21 and a valve hole 22A by casting, and the bolt of the positioning bolt hole 23 through which the positioning hole 7 and the valve hole 22A and the like that require precision by machining or the like are passed. A hole 23a and positioning bolt holes 33, 53, 63 are formed. Here, generally when the casting coarse material of the valve body has a punched hole that needs to be processed after casting, and a hole forming part that is adjacent to the punched hole and processes the processed hole by cutting or the like, There is a possibility that the hole forming portion is thick and a cast hole is generated. In that state, if the cast hole is machined into the valve hole by cutting or the like, and the positioning bolt hole is machined into the thick hole forming part by cutting or the like, the cast hole generated at the thick hole forming part is Oil leakage may occur.

  In the valve body 1 shown in FIG. 1, the valve hole 22A processed by cutting or the like from the punched hole and the positioning bolt hole 23 disposed adjacent to the valve hole 22A correspond. Note that the positioning bolt insertion hole 33 of the rear body 3 and the positioning bolt fastening hole 43 of the front body 4 are formed in the rear body 3 and the front body 4 only with as-cast oil passages 21 and 41 and are cut by cutting or the like. Since the valve hole to be processed is not formed, the above problem does not occur.

  Therefore, as shown in FIG. 1, the positioning bolt hole 23 of the middle body 2 of the present embodiment has a larger diameter than that of the middle body 2 so that a gap is generated between the positioning bolt hole 23 and the shaft of the positioning bolt 7. Are formed of a cast hole 91 having a bottom portion 92 formed from both end surfaces (a mating surface with the separators 5 and 6 of the middle body 2), and a bolt hole 23a processed by cutting or the like so as to penetrate the bottom portion 92. ing. Therefore, the thin casting 92 of the middle body 2 is formed with thin-walled bottom portions 92 from both end surfaces of the middle body 2 in which the bolt holes 23a having a predetermined fit with the shafts of the positioning bolts 7 are processed by cutting or the like. Further, it is formed between the respective cast holes 91. That is, conventionally, a bolt hole that has a predetermined fit with the shaft of the positioning bolt 7 is formed across both end faces of the middle body 2, but in this embodiment, the outline of the AA line in FIG. 2 shown in FIG. As shown in the cross-sectional view, a bolt hole 23a having a predetermined fit with the shaft of the positioning bolt 7 is formed between both end surfaces of a thin bottom portion 92 formed at a substantially central portion between both end surfaces of the middle body 2. .

  By using the positioning bolt hole 23 having such a configuration, the bottom 92, which is the site where the bolt hole 23a is formed, becomes thin, and the occurrence of a cast hole can be suppressed. For this reason, even if the valve hole 22A and the bolt hole 23a are processed by cutting or the like, the cast hole does not appear on the inner peripheral surface, and the function of the valve disposed in the valve hole 22A is not impaired. Moreover, since the axial length of the bolt hole 23a processed into the thin-walled bottom portion 92 may be shorter than the axial length of the bolt hole processed over both end faces of the conventional middle body 2, a highly accurate bolt hole 23a can be easily formed. can do. For this reason, the combined bodies 2, 3, and 4 can be fastened and positioned with high accuracy, and the processing cost of the valve body 1 can be reduced.

  Further, since the punched hole 91 is formed by pulling out the protruded cast pin, it is necessary that the cast pin has a tapered shape, that is, the diameter of the core of the cast pin is larger than the diameter of the tip of the cast pin. And since the magnitude | size of the bottom part 92 decided by the diameter of the bolt hole 23a which lets the positioning bolt 7 pass is constant, the base diameter of a cast pin changes with the formation position of the cast part 91, ie, the depth of the cast hole 91. . Since the above-mentioned casting hole 91 is formed on both sides in the thickness direction of the bottom portion 92 formed at a substantially central portion between both end faces of the middle body 2, the depth of the casting hole 91 is set at the bottom portion of the middle body 2. Is formed on one end surface side, and becomes shallower than the depth of the cast hole when the cast hole is formed in a portion extending from the other end surface side of the middle body 2 to the bottom portion.

  Therefore, the cast pin that forms the cast hole 91 becomes the cast pin having the smallest diameter of the cast pin, so that the valve hole 22A and the positioning bolt hole 23 are connected from the other end surface side of the middle body 2. The valve body 1 can be reduced in size and weight by reducing the occupying space of the valve body 1 as compared with the case where the valve body 1 is formed at the bottom portion. In particular, when viewed from the opening direction of the valve hole 22A or the like, the intersection La of the axis 91a of the core hole 91 and the perpendicular L extending from the axis 22Ac of the valve hole 22A is located in the bottom portion 92. Since the bottom portion 92 is disposed, the valve body 1 can be further reduced in size and weight because the circular valve hole 22A and the taper-shaped cast hole 91 can be disposed closer to each other without interfering with each other. .

  Further, the cast hole 91 formed on the front body 4 side is formed so as to be connected to the bent portion 25a of the key groove 25 formed in the vicinity of the inlet 22Aa (see FIG. 2) of the valve hole 22A. Thereby, since the valve hole 22A and the positioning bolt hole 23 can be arranged closer to each other, the space occupied by both can be further reduced, and the valve body 1 can be further reduced in size and weight. Note that an L-shaped key 26 (see FIG. 1) is inserted into the key groove 25 to contact the end surface of a valve (not shown) inserted into the valve hole 22A via a spring to prevent the valve from coming off. The By inserting the bent portion of the key 26 into the bent portion 25 a of the key groove 25, it is possible to prevent the key 26 from being detached when inserted into the key groove 25.

  As shown in FIG. 1, the positioning bolt hole 23 having the above-described cast hole 91 and the bolt hole 23a machined in the bottom portion 92 has valve holes 22A and 22B on both sides of the positioning bolt hole 23 as shown in FIG. Since the bolt hole 23 and the valve holes 22A and 22B can be arranged close to each other, the space occupied by each hole can be further reduced, and the valve body 1 can be further reduced in size and weight.

1 is a schematic cross-sectional view showing a valve body according to an embodiment of the present invention. The schematic plan view which shows the casting coarse material of the middle body of the valve body shown in FIG. The AA line schematic sectional drawing of the casting rough material of the middle body shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Valve body, 2 ... Middle body, 7 ... Positioning bolt, 21 ... Oil passage, 22A, 22B, 22C ... Valve hole, 23 ... Positioning bolt hole, 23a ... Bolt hole, 91 ... Cast hole, 92 ... bottom.

Claims (5)

In the valve body provided in the hydraulic control device of the automatic transmission,
And the valve hole, open in a direction perpendicular to the opening direction of the valve hole at a portion adjacent to the valve hole, possess the hole punching cast having a bottom, and a machining hole penetrating the bottom portion, the cast hole Is formed so as to open in both directions in a direction perpendicular to the opening direction of the valve hole across the bottom . 2. The bottom portion according to claim 1 , wherein when viewed from the opening direction of the valve hole, the bottom portion is positioned such that an intersection of a perpendicular extending from the axis of the valve hole with respect to the axis of the core hole is located in the bottom portion. A valve body characterized by the arrangement. 2. The valve body according to claim 1 , wherein the valve body has a structure divided into a plurality of bodies, and the machining hole is a hole through which positioning fastening means for fastening and positioning between the combined bodies is inserted. A valve body characterized by The valve body according to claim 2 , wherein the valve body is divided into a rear body having a minimum area as viewed from an opening direction of the cast hole, a middle body having an intermediate area having the valve hole, and a front body having a maximum area. A valve body characterized in that a fastening means is disposed on a diagonal line of the rear body, and the cast hole is formed in the middle body. In any one of claims 1 to 4, wherein the keyway for inserting a key to prevent the omission of the valve from the valve hole is formed near the end portion of the valve hole, the hole the keyway punching cast the A valve body formed to be connected.

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