JP6423178B2 - Solenoid valve and manufacturing method thereof - Google Patents

Description

  The present invention relates to a solenoid valve used in a hydraulic system of an automobile and a manufacturing method thereof.

  An automobile is provided with a solenoid valve at a predetermined position of a hydraulic flow path in order to control supply of hydraulic oil and lubricating oil to hydraulic equipment. The solenoid valve has a valve body and a solenoid portion, and is configured to displace a spool valve disposed in the valve body by an energizing action of the solenoid portion (see Patent Document 1). When the spool valve is displaced and is arranged at a predetermined position in the valve main body by the adjustment plug, the hydraulic flow passage and the valve main body (valve hole) communicate with each other to allow the hydraulic pressure to flow.

Japanese Patent No. 3488862

  By the way, in the manufacture of the solenoid valve, a solenoid part is attached to one end of the valve body, and in this state, an operation of inserting and fixing the adjustment plug from the other end side (the side opposite to the solenoid part) of the valve body is performed.

  However, the side peripheral surface of the valve body is provided with a flow path portion for circulating hydraulic pressure in the valve body, and the valve main body is surrounded by the assembly stress when the adjustment plug is inserted and fixed. If stress concentration occurs on the side wall, the shape may be deformed. For this reason, the solenoid valve is required to be designed to increase the thickness of the valve body so as not to be deformed by stress concentration. In this case, there arises another inconvenience that the valve body is increased in size and weight by the increase in thickness.

  The present invention has been made in view of the above circumstances, and can suppress the deformation of the valve body when assembling the adjustment plug, thereby improving the quality of the product, and reducing the size and weight of the device. An object of the present invention is to provide a solenoid valve and a method for manufacturing the solenoid valve.

  In order to achieve the above object, the present invention provides a solenoid part that applies an electromagnetic thrust to press the spool valve in the axial direction, the solenoid part is attached to one end, and the spool valve is slidably accommodated. A regulating hole for adjusting the positional relationship between the spool valve and the valve hole under the action of electromagnetic thrust, and the regulating hole connected to the valve hole in the other end opposite to the solenoid part. A solenoid valve including a mounting hole to be fixed and a valve body having a plurality of flow passage portions communicating with the valve hole and the outside, and an outer periphery of the valve body located radially outside the mounting hole The surface is provided with a holding portion for holding the valve body in the axial direction.

  According to the above, the solenoid valve can suppress the deformation of the valve body by holding the valve body via the holding part at a position outside the mounting hole to which the adjustment plug is fixed at the time of manufacture. In other words, when the adjustment plug is fixed to the mounting hole, the holding portion near the mounting hole receives the assembly stress of the adjustment plug, so that the assembly stress is prevented from being transmitted to the valve body on the proximal side of the mounting hole. Distortion does not occur near the road. Accordingly, it becomes possible to fit the spool valve and the adjustment plug to the valve body with high accuracy, and the quality of the product can be improved. In addition, since the spool valve is accommodated and arranged with high accuracy, the electromagnetic thrust of the solenoid portion can be reduced, and the solenoid portion can be reduced in size. Furthermore, the strength of the valve body can be reduced to further promote thinning (downsizing) and weight reduction.

  In this case, the holding portion is preferably a pair of grooves formed along a direction orthogonal to the axial direction of the valve body.

  Thus, by configuring the holding portion with a pair of groove portions, the valve body can be fixed simply by dropping the fixing member that fits into the groove portion toward the valve body, facilitating the manufacture of the solenoid valve. Can do.

  In order to achieve the above-mentioned object, the present invention provides a solenoid part that applies electromagnetic thrust to press the spool valve in the axial direction, the solenoid part is attached to one end, and the spool valve is slidable. A control hole for adjusting the positional relationship between the spool valve and the valve hole under the action of electromagnetic thrust, and the adjustment plug connected to the valve hole in the other end opposite to the solenoid part. And a valve main body having a plurality of flow passage portions communicating with the valve hole and the outside, the solenoid valve manufacturing method being located radially outside the mounting hole A holding portion for holding the valve main body in the axial direction is provided on the outer peripheral surface of the valve main body, the outer peripheral surface of the valve main body is externally fitted by a jig portion of an assembly apparatus, and the jig The valve body A solenoid valve fixing step in which a fixing member is inserted from a direction different from the axial direction and the holding portion is held by the fixing member; a pressure fluid is circulated through the solenoid valve; The adjusting plug is inserted into the mounting hole while measuring the pressure fluid pressure, and when the pressure fluid pressure reaches a predetermined pressure, And an adjusting plug adjusting step for ending the entry.

  According to the above, when the solenoid valve is manufactured, the valve body is deformed by holding the valve body via the holding portion at the position outside the mounting hole where the adjustment plug is fixed by performing the solenoid valve fixing step. Can be deterred. Further, the valve body is fixed simply by inserting the fixing member into the jig portion, and the fixing member itself is stiffened by being inserted into the jig portion. Therefore, it is possible to prevent the inconvenience that the fixing member is deformed when the adjustment plug is attached and the solenoid valve is displaced and deformed. As a result, the quality of the solenoid valve can be improved, and it is possible to further promote downsizing of the solenoid part, thinning (downsizing) and lightening of the valve body.

  The jig portion may be provided with a plurality of test pressure fluid passages corresponding to the flow passage portion of the valve body.

  Thus, by providing the test pressure fluid path in the jig portion, the flow passage can be communicated with the test pressure fluid path simply by fitting the valve body to the jig portion. The jig portion can satisfactorily supply the pressure fluid to the valve main body via the test pressure fluid path when the adjustment plug adjustment process is performed.

  According to the present invention, the solenoid valve can suppress the deformation of the valve body when assembling the adjusting plug, can improve the quality of the product, and can further promote the downsizing and weight reduction of the device. .

FIG. 1A is a plan view showing the entire configuration of a solenoid valve according to an embodiment of the present invention from below, and FIG. 1B is a partial side sectional view showing the solenoid valve of FIG. 1A. It is a perspective view which shows the state which attached the solenoid valve of FIG. 1A to the assembly apparatus. 3A is a partial side cross-sectional view showing a mounting state of the solenoid valve and the assembling apparatus, and FIG. 3B is an enlarged cross-sectional view showing an insertion state of the adjustment plug of the solenoid valve of FIG. 3A. 4A is a plan sectional view showing a state in which the solenoid valve is fixed by a fixing member, and FIG. 4B is a sectional view taken along line IVB-IVB in FIG. 4A.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a solenoid valve according to the present invention will be described in detail with reference to the accompanying drawings by giving preferred embodiments in relation to a method for manufacturing a solenoid valve.

  The solenoid valve 10 according to an embodiment of the present invention is used to control supply or stop of supply of hydraulic pressure (such as hydraulic fluid) that is a pressure fluid. The solenoid valve 10 is provided in a hydraulic system of an automobile (for example, a variable valve mechanism that makes the opening / closing timing of an intake / exhaust valve of an engine variable). The hydraulic oil is stored in the hydraulic pressure source A of the automobile, flows through the flow passage B including the solenoid valve 10, and is supplied to the hydraulic pressure operating unit C. At this time, the solenoid valve 10 appropriately controls the flow of the hydraulic oil by performing an excitation action proportional to the power supply.

  As shown in FIGS. 1A and 1B, the solenoid valve 10 includes a valve body 12 and a solenoid portion 14. In the following description, the left side in the drawing is referred to as the distal end side of the solenoid valve 10 and the right side in the drawing is referred to as the proximal end side of the solenoid valve 10 based on the arrow directions shown in FIGS. 1A and 1B. Moreover, the up-down direction in FIG. 1A which planarly viewed the solenoid valve 10 from below is referred to as a width direction, and the up-down direction in FIG. These direction indications are for convenience of explanation, and it is a matter of course that the solenoid valve 10 may be used in an arbitrary direction.

  The valve body 12 of the solenoid valve 10 is a mechanical mechanism part that constitutes a part of the hydraulic flow passage B in the hydraulic system of the automobile and controls the flow of hydraulic pressure. The valve body 12 is configured as a cylindrical casing having a predetermined axial length over the base end and the tip end. On the proximal end side of the valve main body 12, a flange portion 12b that protrudes radially outward with respect to the body portion 12a having a substantially constant outer diameter is integrally formed. The solenoid portion 14 is attached to the flange portion 12b by predetermined attachment means such as caulking or press fitting.

  The solenoid portion 14 of the solenoid valve 10 has a cylindrical casing 14a having a diameter larger than that of the valve main body 12, and an electric mechanism section that applies electromagnetic thrust to the valve main body 12 in the casing 14a. The solenoid unit 14 can employ a known configuration. For example, the solenoid unit 14 includes a movable shaft 16 (armature) disposed at the shaft center, a coil unit 18 that applies electromagnetic thrust to the movable shaft 16 based on power supply, and a coupler that supplies (energizes) power to the coil unit 18. 20 and so on. The solenoid unit 14 excites the coil unit 18 in proportion to the power supply amount of the coupler 20 to move the movable shaft 16 forward in the distal direction.

  The valve body 12 opens and closes the flow path B based on the driving state of the solenoid unit 14. The valve body 12 has a through-hole 22 formed so as to penetrate the shaft center portion in order to accommodate various configurations therein. The through-hole 22 is formed from the base end surface of the valve body 12 to the valve hole 24 formed in the middle of the body portion 12a, and to the tip opening 26a of the valve body 12 connected to the distal end side of the valve hole 24. Hole 26. In the through hole 22, a spool valve 30, a valve spring 32, and an adjustment plug 34 are accommodated in order from the proximal end side to the distal end side.

  The spool valve 30 is a movable member of the solenoid valve 10 and is configured as a cylindrical body having a predetermined length along the axial direction. The base end of the spool valve 30 is a flat receiving surface 30 a that contacts the movable shaft 16 of the solenoid portion 14 and receives the electromagnetic thrust of the movable shaft 16. At the tip of the spool valve 30, a spool valve side accommodation recess 36 for accommodating the base end portion of the valve spring 32 is provided.

  Further, a first annular groove 38 and a second annular groove 40 that are recessed radially inward along the circumferential direction are provided on the side wall of the spool valve 30. The first annular groove 38 is formed slightly closer to the base end than the intermediate portion of the spool valve 30 and has a wider groove width in the axial direction. The second annular groove 40 is formed closer to the tip than the first annular groove 38 of the spool valve 30 and has a narrower groove width than the first annular groove 38. The first annular groove 38 and the second annular groove 40 communicate with each other via a communication passage 42 formed obliquely inside the spool valve 30.

  The spool valve-side accommodation recess 36 is recessed by a predetermined depth (approaching the vicinity of the second annular groove 40) from the distal end surface of the spool valve 30 toward the proximal direction. The inner diameter of the spool valve side accommodation recess 36 substantially matches the outer diameter of the valve spring 32. Thereby, the spool valve side accommodation recess 36 holds the base end of the valve spring 32 without being shaken.

  The valve spring 32 is formed as a coil spring having an axial center that substantially coincides with the axial direction of the valve body 12. The valve spring 32 is disposed between the spool valve 30 and the adjustment plug 34. The base end of the valve spring 32 is seated on the bottom surface of the spool valve side accommodation recess 36, and the tip of the valve spring 32 is seated on the bottom surface of an adjustment plug side accommodation recess 44 of the adjustment plug 34 described later. The valve spring 32 is retracted and accommodated as the adjustment plug 34 is fixed. Therefore, the valve spring 32 constantly urges the spool valve 30 in the proximal direction (solenoid part 14 side) with the adjustment plug 34 as a base point. Therefore, the base end of the spool valve 30 is always in contact with the movable shaft 16 of the solenoid unit 14.

  The adjustment plug 34 is accommodated and fixed in the mounting hole 26 of the valve body 12, thereby defining the set length of the valve spring 32. That is, the initial load of the valve spring 32 is adjusted by the depth of pressing the adjustment plug 34 into the mounting hole 26. The adjustment plug 34 is formed in a cylindrical shape having an adjustment plug side accommodation recess 44 on the base end side and a pressing recess 46 on the distal end side.

  The adjustment stopper side accommodation recess 44 is depressed by a predetermined depth from the base end surface of the adjustment stopper 34 toward the distal end, and has an inner diameter that substantially coincides with the spool valve side accommodation recess 36. As described above, the distal end side of the valve spring 32 is inserted into the adjustment plug side accommodation recess 44.

  On the other hand, when the adjustment plug 34 is assembled into the mounting hole 26, a press-fit rod 94 (see FIG. 2) for pushing the adjustment plug 34 in the proximal direction is accommodated in the depression 46 for insertion. A side peripheral surface of the adjustment plug 34 that overlaps the depression 46 for pressing is formed as a press-fit fitting surface 34 a with the mounting hole 26.

  The side peripheral surface of the adjustment plug 34 that overlaps the adjustment plug-side accommodation recess 44 is formed as a small-diameter portion 34b that is slightly smaller in diameter than the press-fit fitting surface 34a, and an O-ring 50 is attached to the small-diameter portion 34b. An annular groove 48 is formed along the circumferential direction. The adjustment plug 34 is in close contact with the inner peripheral surface of the mounting hole 26 by the press-fitting fitting surface 34a, and is firmly housed and fixed in the axial direction of the valve body 12. Further, in this state, in addition to the press-fitting fitting surface 34a, the O-ring 50 is attached to the annular groove 48, and the distal end side (mounting hole 26) of the valve main body 12 is liquid-tightly closed.

  The peripheral wall of the valve body 12 has a plurality of flow passage portions 52 (hereinafter referred to as first to fifth ports 52a from the proximal end side to the distal end side of the valve body 12) that communicate the valve hole 24 with the outside of the valve body 12. To 52e). The first port 52 a communicates with an annular oil passage 53 a provided so as to accommodate the contact portion between the spool valve 30 and the movable shaft 16 in the valve hole 24 and is open to the oil reservoir D. The second port 52b is provided so as to communicate with the annular oil passage 53b defined in the valve hole 24 so as to surround from the first annular groove 38 to the proximal side wall of the spool valve 30, and with the first port 52a Similarly, the oil reservoir D is opened. The third port 52c is provided so as to face the first annular groove 38 of the spool valve 30, and further communicates with the flow passage B connected to the hydraulic operation part C of the automobile. The fourth port 52d also communicates with an annular oil passage 53c provided so as to be opposed to the first annular groove 38 of the spool valve 30 and a flow passage B connected to a hydraulic pressure source A of the automobile. The hydraulic oil supplied from the hydraulic pressure source A flows through the first annular groove 38 to the third port 52c. The fifth port 52 e communicates with a space in which the valve spring 32 facing the tip of the spool valve 30 is disposed and is opened to the oil reservoir D through the orifice 54.

  The solenoid valve 10 positions the spool valve 30 on the proximal end side of the valve hole 24 by the urging force of the valve spring 32 as shown in FIG. 1B in a state where the supply of power to the solenoid unit 14 is stopped. In this state, the side wall of the spool valve 30 faces the fourth port 52d and blocks the flow of hydraulic oil from the hydraulic power source A to the third port 52c.

  On the other hand, the solenoid valve 10 drives the movable shaft 16 in the power supply state to the solenoid unit 14 and propels it in the distal direction. The movable shaft 16 displaces the spool valve 30 in the distal direction against the urging force of the valve spring 32 with a propulsive force proportional to the magnitude of the supply current. The spool valve 30 is displaced by a predetermined amount in the distal direction, thereby opening and closing the port. The first annular groove 38 is simultaneously communicated with the third port 52c and the fourth port 52d, and the operation to the third port 52c is performed. Regulate oil pressure. Therefore, the control hydraulic pressure adjusted from the hydraulic power source A to the hydraulic operation unit C flows through the passage opening corresponding to the magnitude of the supply current. The solenoid valve 10 can operate the hydraulic actuator C based on this control hydraulic pressure.

  The hydraulic fluid supplied to the first annular groove 38 via the fourth port 52d also diverts to the second annular groove 40 via the communication path 42. The communication path 42 is a feedback oil path. As a result, the control hydraulic pressure acts on the second annular groove 40 as a feedback pressure, and the spool valve 30 is moved in the proximal direction in response to an increase in the feedback pressure input to the second annular groove 40. The control oil pressure is corrected (regulated) as appropriate. A part of the hydraulic oil supplied into the through hole 22 circulates around the spool valve 30 and then is discharged to the oil reservoir D via the first, second and fifth ports 52a, 52b and 52e. The Thereby, the lubricity of the spool valve 30 is improved. Thus, the orifice 54 provided in the fifth port 52e serves to reduce the axial vibration of the spool valve 30 due to its flow path resistance.

  The valve main body 12 is provided with a holding portion 60 in order to prevent the valve main body 12 from moving in the axial direction and the valve main body 12 from being deformed when the above-described configuration is assembled into the through hole 22 at the time of manufacture. . As shown in FIG. 1A, the holding portion 60 according to the present embodiment includes a pair of groove portions 62 formed on the outer peripheral surface 13 of the valve body 12.

  The pair of grooves 62 are provided at positions (on the same axis as the valve main body 12) facing each other across the axial center portion of the valve main body 12. The groove portion 62 is formed on the distal end side of the valve body 12, that is, on the radially outer side at a position overlapping the mounting hole 26 of the valve body 12. Thus, the groove 62 is preferably formed as close as possible to the press-fit fitting surface 34a of the adjustment plug 34. Thereby, when inserting the adjustment plug 34 in the valve main body 12, the valve main body 12 can be hold | maintained favorably and distortion of the valve main body 12 by insertion stress can be suppressed suitably.

  The pair of groove portions 62 are formed so that the bottom portions 62a of the groove portions 62 extend in parallel with each other by being cut out linearly along the height direction of the valve body 12. That is, the groove part 62 in which the bottom part 62a extends linearly becomes the deepest in the intermediate part in the height direction of the cylindrical valve body 12, and becomes gradually shallower as it is vertically separated from the intermediate part. By forming it in such a shape, the valve body 12 can suppress a decrease in strength at the location where the groove 62 is formed. Further, the pair of groove portions 62 extending in parallel allows a fixing member 76 to be described later to easily enter from the extending direction of the groove portion 62, and is engaged with the fixing member 76 so as to be around the axis of the valve body 12. Rotation can also be regulated.

  The pair of groove portions 62 are formed so as not to communicate with the mounting hole 26 even at the deepest intermediate portion in the height direction, that is, shallower than the wall thickness of the peripheral wall of the valve body 12. Therefore, the mounting hole 26 is not distorted by the insertion stress of the adjusting plug 34, and the circular shape of the cross section is kept good. The groove width of the groove portion 62 (width along the axial direction of the valve body 12) is set to such an extent that it loosely fits (clearance fit) with the fixing member 76.

  The solenoid valve 10 is basically configured as described above. Next, the configuration of the assembly device 70 for attaching the adjustment plug 34 to the valve body 12 of the solenoid valve 10 will be described. As shown in FIG. 2, the assembling apparatus 70 includes a base portion 72, a jig portion 74, a fixing member 76, and a pushing portion 78.

  The base portion 72 is a block body formed in a square shape, and the jig portion 74 is screwed and fixed to the upper surface, and the pushing portion 78 is screwed to one side surface. Thereby, the base 72 fixes the relative position of the jig part 74 and the pushing part 78.

  The jig portion 74 has a plurality of fixing bolt holes 74a, and is firmly fixed by sandwiching the base portion 72 on the upper surface of a base (not shown) by a plurality of fixing bolts inserted through the fixing bolt holes 74a. The A fitting hole 80 that fits the outer shape of the valve body 12 and substantially matches the inner diameter (not shown) of the insertion portion of the solenoid valve 10 in the automobile hydraulic system is provided inside the jig portion 74. 74 accommodates the solenoid valve 10 in the fitting hole 80 so as to be detachable. As a result, the inner surface of the fitting hole 80 is brought into contact with the outer peripheral surface 13 of the valve main body 12 with an appropriate frictional force to support the valve main body 12 and to suppress the bending / distortion deformation of the valve main body 12. When the adjustment plug 34 is pushed in, the valve body 12 is inserted from the proximal end opening of the fitting hole 80 toward the distal end, and the distal end is exposed from the distal end surface of the jig portion 74.

  As shown in FIG. 3A, the base 72 and the jig portion 74 have a plurality of test pressure fluid paths 82 (first to first ports) communicating with the first to fifth ports 52 a to 52 e in the fitted state of the valve body 12. Four pressure fluid paths 82a-82d) are provided. In this case, the first pressure fluid passage 82a is formed in a flow path branched so that one side communicates with the first and second ports 52a and 52b, and the other side is connected to an oil reservoir (not shown). One side of the second pressure fluid path 82b communicates with the third port 52c, and the other side is connected to a hydraulic gauge 84 (see FIG. 2). The third pressure fluid path 82c has one side communicating with the fourth port 52d and the other side connected to a hydraulic pressure source 86 (see FIG. 2). The fourth pressure fluid path 82d has one side communicating with the fifth port 52e and the other side connected to an oil reservoir (not shown).

  Further, as shown in FIGS. 2 and 3A, an insertion hole 88 for inserting the fixing member 76 is formed on the upper surface of the jig portion 74. The insertion hole 88 has a predetermined dimension in the width direction (longer than the inner diameter of the fitting hole 80), and the axial dimension is formed in a rectangular cross section that matches the plate thickness of the fixing member 76 described later. It communicates in the orthogonal direction with respect to the fitting hole 80 by penetrating linearly in the direction. In addition, the fixing member 76 is formed so as to be bridged over both the jig portion 74 and the base portion 72 by further providing a recessed portion that extends the insertion hole 88 on the surface of the base portion 72 facing the lower surface of the jig portion 74. May be.

  The fixing member 76 is inserted from the upper surface of the insertion hole 88 after the valve body 12 is inserted into the fitting hole 80 of the jig portion 74, thereby entering the groove portion 62 of the valve body 12 to cure the valve body 12. Engage with the tool part 74. The fixing member 76 has an inverted U shape when viewed from the front, and is formed with a protruding portion 77 that protrudes in the height direction with respect to the jig portion 74. The protruding portion 77 is provided with a hooking hole 77a that is used to remove the fixing member 76 from the jig portion 74 after an adjustment plug adjusting step of the solenoid valve 10 described later. The length in the width direction of the fixing member 76 is set to be larger than the outer diameter of the valve body 12 and smaller than the width of the insertion hole 88, whereby a predetermined distance in the width direction is set between the fixing member 76 and the insertion hole 88. A play space is formed. This play space is set to prevent the fixing member 76 from deforming the valve body 12 when the fixing member 76 engages the valve body 12 with the jig portion 74. The fixing member 76 is made of a carbon steel material such as tool steel (SK material), for example, and coupled with the plate thickness, the fixing member 76 is inserted via the valve body 12 when the adjustment plug 34 is pressed into the valve body 12. It is formed so as not to deform itself.

  The fixing member 76 includes a pair of leg portions 90 that protrude downward from a substantially middle portion in the height direction. The pair of leg portions 90 are portions that enter the pair of groove portions 62 of the valve body 12 inserted and held in the jig portion 74. The length in the width direction of the leg 90 is set sufficiently longer than the depth of the groove 62 of the valve body 12. That is, the leg portion 90 is positioned in both the groove portion 62 and the insertion hole 88 of the jig portion 74 in a state where the fixing member 76 holds the valve body 12 (see also FIG. 4B). Accordingly, the fixing member 76 can be engaged with the valve main body 12 in a state where the fixing member 76 is inserted into the jig portion 74, and can effectively restrict the movement of the valve main body 12 in the axial direction.

  On the other hand, the push-in portion 78 has a plurality of fixing bolt holes 78a, and includes a guide member 92 fixed to one side surface of the base portion 72, and a press-fit rod 94 inserted and guided in the guide hole 92a of the guide member 92. . The guide member 92 is fixed so as to protrude upward from the base 72 so that the axis of the guide hole 92 a coincides with the axis of the fitting hole 80 of the jig portion 74. One end of the press-fit rod 94 is connected to the actuator 96, and an intermediate portion is inserted into the guide hole 92 a of the guide member 92. The press-fitting rod 94 advances and retreats along the axial direction of the valve main body 12 fixed by the jig portion 74 and the fixing member 76 based on the guide of the guide hole 92 a by applying a driving force from the actuator 96.

  The solenoid valve 10 may be configured such that the adjustment plug 34 is screwed into the mounting hole 26 instead of the configuration in which the adjustment plug 34 is press-fitted by the press-fitting rod 94. In this case, the pushing portion 78 includes a screwing rod or the like that pushes the adjusting plug 34 in the proximal direction while rotating the adjusting plug 34. Similarly, the pushing recess 46 of the adjusting plug 34 is also used for screwing (for example, a hexagonal shape). ). The valve body 12 is also restricted from rotating about its axis by engaging the groove 62 with the leg portion 90 of the fixing member 76. For this reason, even if the adjustment plug 34 is screwed in, the valve body 12 can be firmly fixed and the position of the adjustment plug 34 can be set.

  The assembling apparatus 70 is basically configured as described above. Hereinafter, a method for manufacturing the solenoid valve 10 using the assembling apparatus 70 will be specifically described.

  In manufacturing the solenoid valve 10, first, the spool valve 30 is inserted from the base end side of the through hole 22 of the valve body 12, and then the solenoid portion 14 is attached to the base end. Thereby, the tip of the movable shaft 16 of the solenoid part 14 is inserted into the valve hole 24 of the valve body 12.

  Next, a solenoid valve fixing step of mounting and holding the valve body 12 in this state on the assembly apparatus 70 is performed. In the solenoid valve fixing step, the valve body 12 is inserted from the proximal end opening of the fitting hole 80 of the jig portion 74 toward the distal end, and the outer peripheral surface of the valve body 12 is moved by the jig portion 74 as shown in FIG. 3A. 13 is fitted. In this state, the first and second ports 52 a and 52 b of the valve body 12 communicate with the first pressure fluid path 82 a of the jig portion 74. The third port 52c communicates with the second pressure fluid path 82b, the fourth port 52d communicates with the third pressure fluid path 82c, and the fifth port 52e communicates with the fourth pressure fluid path 82d.

  Further, in a state where the valve main body 12 is externally fitted through the fitting hole 80, the fixing member 76 is inserted from the insertion hole 88 on the upper surface of the jig portion 74, and a pair of the valve main body 12 is connected by the pair of leg portions 90 of the fixing member 76. The groove 62 is engaged. That is, the movement of the valve body 12 in the axial direction is restricted by the fixing member 76 inserted from the direction orthogonal to the axial direction. Thereby, the valve body 12 is firmly fixed to the jig portion 74.

  After the solenoid valve fixing step is performed, a control plug temporary insertion step is performed. In the adjustment plug temporary insertion step, the valve spring 32 is inserted into the through hole 22 of the valve main body 12 with the press-fitting rod 94 separated from the valve main body 12, and the adjustment plug 34 is fitted into the tip opening 26a. That is, as shown in FIG. 3B, only the small-diameter portion 34b, which is a portion where the O-ring 50 of the adjustment plug 34 is mounted, which is slightly smaller in diameter than the press-fitting fitting surface 34a, is inserted into the mounting hole 26 of the valve body 12. The adjustment plug 34 is held in the mounting hole 26 by the O-ring 50, and the valve spring 32 is accommodated in the adjustment plug side accommodation recess 44 and the spool valve side accommodation recess 36. Thereafter, the actuator 96 is driven to move the press-fit rod 94 toward the valve main body 12, and the drive of the actuator 96 is stopped in a state where the press-fit rod 94 enters the pushing recess 46 of the adjustment plug 34 and is lightly in contact therewith.

  After the adjustment plug temporary insertion step, a preparation step is performed. In the preparation process, hydraulic oil having a predetermined reference pressure (for example, 200 kPa) is supplied from the hydraulic pressure source 86 toward the third pressure fluid path 82c of the assembling apparatus 70. Further, in this state, predetermined power (for example, an intermediate current) is supplied from the coupler 20 of the solenoid unit 14 to the coil unit 18 to obtain a reference excitation state. As a result, the movable shaft 16 moves in the distal direction, and the spool valve 30 is also displaced in the distal direction by being pressed by the movable shaft 16.

  And the adjustment plug adjustment process is implemented in the state which implemented said preparation process. In the adjustment plug adjustment process, the actuator 96 is driven again while measuring the pressure of the hydraulic oil output from the second pressure fluid passage 82b of the assembling apparatus 70 with the oil pressure gauge 84, and the proximal direction of the valve body 12 is determined. The press-fitting rod 94 is gradually moved toward. As a result, the press-fitting fitting surface 34 a of the adjustment plug 34 is gradually pushed toward the proximal end of the mounting hole 26 of the valve body 12.

  Here, as shown in FIGS. 4A and 4B, the valve main body 12 is restricted from moving in the axial direction with respect to the jig portion 74 because the leg portion 90 of the fixing member 76 engages the groove portion 62. ing. Therefore, even if the press-fitting rod 94 is press-fitted, only the adjustment plug 34 can be pushed in the proximal direction without moving the valve body 12. In particular, since the fixing member 76 fixes the vicinity of the tip end portion of the valve body 12 (the radially outer side of the mounting hole 26), the pressing force of the press-fit rod 94 can be received by the fixing member 76. Therefore, it is possible to prevent the pushing force from being transmitted to the proximal end side of the valve main body 12, and the deformation of the body portion 12a of the valve main body 12 is suppressed. The valve spring 32 is accelerated to contract as the adjustment plug 34 is pushed.

  The flow amount of hydraulic oil changes by pushing in the adjustment plug 34 by the adjustment plug adjustment process. Therefore, the oil pressure gauge 84 is monitored (measured), and when the pressure of the hydraulic oil reaches a specified pressure (for example, 100 kPa), the pushing-in of the press-fitting rod 94 is stopped, and the adjustment plug adjustment process is terminated.

  Thereafter, the supply of hydraulic pressure to the third pressure fluid passage 82c is stopped, and factory air is blown in place of the hydraulic oil, and the hydraulic oil remaining in the solenoid valve 10 is extracted. Thereafter, the press-fit rod 94 is retracted from the adjustment plug 34. At this time, the adjustment plug 34 is firmly fixed in the mounting hole 26 by the press-fitting fitting surface 34a, and therefore does not follow the retracted press-fit rod 94 and remains in the position where the push-in of the press-fit rod 94 is stopped. It will be. Furthermore, by hanging a predetermined tool on the hooking hole 77a of the fixing member 76 and lifting it upward, the fixing member 76 is removed from the jig portion 74, and the solenoid valve 10 is removed from the jig portion 74. Complete manufacturing (assembly adjustment).

  As described above, according to the solenoid valve 10 and the method for manufacturing the same according to the present embodiment, the valve main body 12 is provided at the outer position of the mounting hole 26 to which the adjustment plug 34 is fixed by providing the holding portion 60. By holding this, deformation of the valve body 12 can be suppressed. That is, when the adjusting plug 34 is fixed to the mounting hole 26, the pressing force of the adjusting plug 34 is received by the holding portion 60 near the mounting hole 26, so that the pressing force is applied to the valve body 12 on the base end side with respect to the mounting hole 26. This prevents transmission and prevents distortion near the flow path portion 52. Therefore, the spool valve 30 and the adjustment plug 34 can be fitted to the valve body 12 with high accuracy, and the quality of the product can be improved. Further, by accommodating and arranging the spool valve 30 with high accuracy, the electromagnetic thrust of the solenoid unit 14 can be reduced, and the solenoid unit 14 can be downsized. Furthermore, the strength of the valve main body 12 can be reduced to further promote thinning (downsizing) and weight reduction.

  In this case, by configuring the holding portion 60 with the pair of groove portions 62, the valve main body 12 can be fixed simply by dropping the fixing member 76 fitted into the groove portion 62 toward the valve main body 12. Manufacturing can be facilitated.

  Further, the valve body 12 is fixed by simply inserting the fixing member 76 into the jig portion 74, and the fixing member 76 itself is stiffened by being inserted into the jig portion 74. Therefore, it is possible to prevent a problem that the fixing member 76 is deformed when the adjustment plug 34 is attached, and the solenoid valve 10 is displaced and deformed. Further, the test pressure fluid passage 82 is provided in the jig portion 74, so that the flow passage portion 52 can be communicated with the test pressure fluid passage 82 only by fitting the valve body 12. The jig portion 74 can satisfactorily supply the pressure fluid to the valve body 12 via the test pressure fluid passage 82 when the adjustment plug adjustment process is performed.

  In the above description, the present invention has been described with reference to preferred embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. Yes. For example, the solenoid valve 10 is used for the flow of various pressure fluids such as hydraulic oil used in a transmission, lubricating oil supplied to a sliding part of an engine or an automatic transmission, cooling water circulated and supplied to a high temperature part of the engine or the like. It may be provided at an appropriate location of the automobile for the purpose of controlling the motor.

  The assembling apparatus 70 is not limited to the configuration in which the jig portion 74 and the fixing member 76 are separate members. For example, if it is the structure which open | releases the fitting hole 80 so that the jig | tool part 74 can be divided | segmented, the structure which integrally formed the latching | locking part (convex part etc.) equivalent to said leg part 90 in the inner surface of the fitting hole 80 But you can. Further, when the jig portion 74 and the fixing member 76 are mechanically assembled and the valve body 12 is fitted into the fitting hole 80, the leg portion 90 of the fixing member 76 is automatically (or manually) fitted into the groove portion 62. ) It may be configured to be inserted.

  The holding portion 60 that holds the valve main body 12 is not limited to the pair of groove portions 62, and various configurations can be applied. For example, three or more groove portions 62 are provided, and the groove portions 62 are provided in the valve main body 12. It may be arranged in a U shape in a sectional view along the circumferential direction. In this case, the fixing member 76 is similarly formed in a U-shape, so that it fits into the groove 62, and the rotation of the valve body 12 around the axis can be more firmly regulated.

DESCRIPTION OF SYMBOLS 10 ... Solenoid valve 12 ... Valve body 14 ... Solenoid part 22 ... Through-hole 24 ... Valve hole 26 ... Mounting hole 30 ... Spool valve 32 ... Valve spring 34 ... Adjustment plug 52 ... Flow path part 60 ... Holding part 62 ... Groove part 70 ... Assembly device 74 ... Jig part 76 ... Fixing member 78 ... Pushing part 80 ... Fitting hole 82 ... Test pressure fluid path 90 ... Leg part

Claims (4)

A solenoid portion that applies electromagnetic thrust to press the spool valve in the axial direction;
The solenoid part is attached to one end, a valve hole for slidably housing the spool valve, an adjustment plug for adjusting the positional relationship between the spool valve and the valve hole under the action of electromagnetic thrust, and the solenoid part communicates with the mounting hole, and said valve hole and the outside for accommodating fixing the adjusting plug Tsurana press-fitted with a mating surface on the piezoelectric inlet fitting surface that the valve hole in the other end portion opposite to the A solenoid valve including a valve body having a plurality of flow paths,
Wherein the outer peripheral surface of the valve body located radially outward of the mounting hole, the holding portion for regulating the movement and rotation of the axis about the axial direction of the valve body is provided,
The holding portions are a pair of grooves formed so that the bottoms extend in parallel with each other by cutting out the outer peripheral surface of the valve main body linearly along a direction orthogonal to the axial direction of the valve main body. , Solenoid valve. The solenoid valve according to claim 1, wherein
The valve body is cylindrical,
The solenoid valve is a solenoid valve that is deepest at an intermediate portion in the orthogonal direction and becomes shallower as the distance from the intermediate portion increases in the orthogonal direction . A solenoid portion that applies electromagnetic thrust to press the spool valve in the axial direction;
The solenoid part is attached to one end, a valve hole for slidably housing the spool valve, an adjustment plug for adjusting the positional relationship between the spool valve and the valve hole under the action of electromagnetic thrust, and the solenoid part A valve body having a mounting hole that is connected to the valve hole in the other end opposite to the valve and accommodates and fixes the adjustment plug, and a valve body that has a plurality of flow passage portions that communicate the valve hole and the outside. A manufacturing method of
Wherein the outer peripheral surface of the valve body located radially outward of the mounting hole, which holding portion for regulating the movement and rotation of the axis about the axial direction of the valve body is provided,
A solenoid valve that externally fits the outer peripheral surface of the valve body by a jig portion of the assembly apparatus, and that holds the holding portion by the fixing member by inserting a fixing member into the jig portion from a direction different from the axial direction of the valve body. A fixing process;
A preparatory step of operating the spool valve by circulating a pressure fluid through the solenoid valve and applying a predetermined current to the solenoid portion;
Adjusting plug adjustment that advances the adjusting plug into the mounting hole while measuring the pressure fluid pressure, and terminates the entering of the adjusting plug when the pressure fluid reaches a predetermined pressure. A method of manufacturing a solenoid valve. In the manufacturing method of the solenoid valve according to claim 3,
The jig part is provided with a plurality of test pressure fluid paths corresponding to the flow path part of the valve body ,
In the solenoid valve fixing step, the holding member is held by the fixing member, and the flow path portion communicates with the test pressure fluid path .

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