JP5076666B2 - Spool device, linear solenoid valve - Google Patents

Description

  The present invention relates to a spool device and a linear solenoid valve.

Conventionally, as a linear solenoid valve, a first diameter portion (first spool) having a plurality of large-diameter lands and a second diameter portion (second spool) having a plurality of medium-diameter lands and small-diameter lands are manufactured. And what inserts this 1st diameter part and 2nd diameter part in an accommodation member (sleeve) is proposed (for example, refer to patent documents 1). In the linear solenoid valve described in Patent Document 1, since each diameter portion is divided, each axial length is shortened, bending is difficult to occur during manufacturing, and the gap between each spool and the sleeve can be reduced. It is possible and the leakage of hydraulic oil can be suppressed.
JP 2004-278642 A

  However, in the linear solenoid valve described in Patent Document 1, it is possible to reduce the gap between the spool and the sleeve, but since the spool slides in the sleeve, a clearance is necessarily required between them. For example, hydraulic fluid may leak from the discharge port. For example, it has been desired to further reduce the leakage of hydraulic oil such as improving energy consumption efficiency.

  This invention is made | formed in view of such a subject, and it aims at providing the spool apparatus and linear solenoid valve which can reduce the leakage of the fluid from a discharge port more.

  The spool device and the linear solenoid valve of the present invention employ the following means in order to achieve the above-described object.

The spool device of the present invention comprises:
A sleeve in which an input port, an output port, and a discharge port through which fluid flows are formed, and an internal space in which fluid can flow is formed;
The internal space is movable in the sliding direction, and the amount of fluid in the input port, the output port, and the discharge port is adjusted along with the movement in the sliding direction. A spool in which a blocking portion is formed to contact the wall portion formed on the input port side of the sleeve and close the input port;
It is equipped with.

  In this spool device, a spool is disposed in an internal space through which a fluid can flow in a sleeve formed with an input port, an output port, and a discharge port through which fluid flows. As the spool moves in the sliding direction, the fluid amounts at the input port, the output port, and the discharge port are adjusted. When the spool is moved in the sliding direction, a closing portion formed on the spool comes into contact with a wall portion formed on the input port side provided on the sleeve to close the input port. In general, a sliding clearance is provided between the spool and the sleeve, and fluid can flow between the clearance. In the present invention, the blocking portion abuts against the wall portion of the input port. Prevent fluid from flowing in. Therefore, it is possible to further reduce the fluid leakage from the discharge port by preventing the fluid from flowing in from the input port. Here, the “wall portion formed on the input port side” includes that a wall portion is formed in the vicinity of the input port.

  In the spool device of the present invention, the spool may be a surface different from a sliding surface that contacts and slides on the inner wall of the sleeve, and a closing portion may be formed as a sealing surface that contacts the wall portion. Good. By doing so, the input port can be closed by abutting on the surface, so that fluid leakage can be prevented more reliably. At this time, the spool may be formed with a closing portion that comes into contact with the wall portion as a sealing surface orthogonal to the sliding direction. In this way, the closed portion can be formed relatively easily, and as a result, fluid leakage from the discharge port can be easily prevented.

  In the spool device of the present invention, the spool is formed adjacent to the closing portion, and a sliding surface is formed that slides in contact with an inner wall in a sliding direction adjacent to the wall portion of the sleeve. It may be a thing. In this way, the flow of fluid from the input port can be prevented at the closed portion after the flow of fluid is suppressed by the sliding surface, so the flow of fluid from the input port can be suppressed more smoothly from the discharge port. The leakage of fluid can be reduced.

  In the spool device of the present invention, the spool is formed with a first land for adjusting a fluid amount at the input port and a diameter smaller than the first land, and the first land closes the input port. A second land that adjusts the amount of fluid at the discharge port so as to open the discharge port when moved in the movement direction may be provided. In this case, the first land that adjusts the amount of fluid at the input port is larger than the second land, so that it is easy to form a closed portion, and thus it is easy to prevent fluid leakage from the discharge port. In addition, when the input port is further closed to reduce the output from the output port, it is easy to prevent fluid leakage from the discharge port. In this case, in the spool, the first land includes a first cylindrical portion and a second cylindrical portion having a diameter smaller than that of the first cylindrical portion, and an outer peripheral surface of the second cylindrical portion is provided on a wall portion of the sleeve. It is a sliding surface which contacts and slides on the adjacent inner wall in the sliding direction, and a connecting surface between the first cylindrical portion and the second cylindrical portion may be the closed portion. A sliding surface that slides in contact with the inner wall in the sliding direction adjacent to the wall portion of the sleeve may be formed on the first land.

  In the spool device of the present invention, the sleeve may be formed with a contact surface perpendicular to the sliding direction on the wall portion, and the spool may be configured such that the closing portion contacts the contact surface. In this case, the closing portion that moves in the sliding direction comes into contact with the contact surface orthogonal to the sliding direction, so that the closing portion and the wall portion are more likely to come into contact with each other.

  In the spool device of the present invention, the sleeve is formed such that the inner diameter of the input port on the output port side is smaller than the inner diameter of the non-output port side, so that the wall portion is formed on the output port side. It is good as well. Here, in the sleeve, the wall portion may be formed on the wall surface of the input port on the output port side, and the contact surface of the wall portion with which the blocking portion abuts may be the wall surface of the input port. . In this way, the wall portion against which the blocking portion abuts can be formed on the sleeve relatively easily, and as a result, it is easy to prevent fluid leakage from the discharge port.

  In the spool device of the present invention including the first land and the second land, the sleeve includes a first sleeve that accommodates the first land and the second land, and a second sleeve fixed to the first sleeve. It is good also as what is formed by. In this case, since the processing accuracy can be increased by making the sleeve separate, the coaxiality can be increased. The sleeve may be configured such that the first sleeve and the second sleeve are fixed to each other on the end portion side of the first land different from the side on which the wall portion and the closing portion abut. By doing so, the first sleeve and the second sleeve are not fixed in the vicinity where the wall portion and the blocking portion abut, so that the degree of closing of the input port can be increased, and it is easy to prevent fluid leakage. . At this time, the spool has the second land formed on the discharge port side, the first land formed on the input port side, and the first land on the feedback port side for feedback provided on the sleeve. A third land having a smaller diameter may be formed, and the sleeve may be configured such that the first sleeve and the second sleeve are fixed to the feedback port side.

  In the spool device of the present invention including the first sleeve and the second sleeve, the sleeve includes an upright wall portion and an upright wall at an axial end portion of either the first sleeve or the second sleeve. A positioning surface adjacent to the insertion portion, and an insertion portion into which the standing wall portion can be inserted and an end surface adjacent to the insertion portion are provided on the other end in the axial direction. In addition, the first sleeve and the second sleeve may be fixed in a state where the end surface is positioned in contact with the positioning surface. If it carries out like this, a 1st sleeve and a 2nd sleeve can be fixed with sufficient precision comparatively easily.

  A linear solenoid valve according to the present invention includes any one of the above-described spool device, a coil, a yoke, and a plunger slidable in a sliding direction, and the sliding of the plunger causes the spool to move in the sliding direction. And a solenoid driving device to be moved. Since the spool device of the present invention can further reduce the leakage of fluid from the discharge port, a linear solenoid valve equipped with the same can obtain the same effect.

  Next, the best mode for carrying out the present invention will be described using examples.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an outline of the configuration of an electromagnetic valve 20 according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of the electromagnetic valve 20 when the input port 52 is closed. FIG. 3 is an explanatory view of an example of the assembly of the first sleeve 42 and the second sleeve 43, FIG. 3A is a view in which the spool 44 is inserted into the first sleeve 42, and FIG. 3B is a second sleeve. FIG. 3C is a diagram after assembling 43 to the first sleeve 42, and FIG. The electromagnetic valve 20 of the embodiment is used for hydraulic control of a clutch incorporated in an automatic transmission of a vehicle, for example, and is hydraulically fed (line) fed from an oil pump (not shown) and regulated by a regulator valve (not shown). It is configured as a linear solenoid valve for direct control capable of directly controlling the clutch CL by generating an optimal clutch pressure from the hydraulic pressure). The electromagnetic valve 20 is configured as a normally open linear solenoid valve in which the input port 52 is opened in an initial state. The solenoid driving device 30 and the solenoid driving device 30 are driven as shown in FIG. And a spool device 40 that regulates and outputs the input hydraulic pressure. In the drawing, the spool 44, the plunger 36 and the shaft 38 are shaded for easy understanding.

  The solenoid drive device 30 includes a yoke 31 as a bottomed cylindrical member, a coil 32 that is disposed on the inner peripheral side of the yoke 31 and in which an insulating wire is wound around an insulating bobbin 32a, and an open end of the yoke 31. A first core 34 formed with a flange portion 34 a to which the outer peripheral portion of the flange is fixed, and a cylindrical portion 34 b extending in the axial direction from the flange portion 34 a along the inner peripheral surface of the coil 32, and the inner peripheral surface of the yoke 31 And a cylindrical second core 35 extending in the axial direction to a position spaced apart from the cylindrical portion 34b of the first core 34 along the inner peripheral surface of the coil 32, and inserted into the second core 35 The plunger 36 is slidable in the axial direction (sliding direction) on the inner peripheral surface of the second core 35 and the inner peripheral surface of the first core 34, and the tip of the plunger 36 is inserted into the cylindrical portion 34 b of the first core 34. Abut and circle And a slidable shaft 38 of the inner peripheral surface of the part 34b in the axial direction. In addition, the solenoid driving device 30 is provided with a terminal 39 electrically connected to the coil 32 on the outer peripheral portion, and can supply power to the coil 32 via the terminal 39. The yoke 31, the first core 34, the second core 35, and the plunger 36 are all made of a ferromagnetic material such as high-purity iron, and the end surface of the cylindrical portion 34 b of the first core 34 and the second core 35. The space between the end faces is formed to function as a nonmagnetic material. In addition, since this space should just function as a nonmagnetic material, you may provide nonmagnetic metals, such as stainless steel and brass.

  In such a solenoid drive device 30, when the coil 32 is energized through the terminal 39, the magnetic flux flows so that the yoke 31, the second core 35, the plunger 36, the first core 34, and the yoke 31 circulate around the coil 32 in this order. A circuit is formed, whereby a suction force acts between the first core 34 and the plunger 36 to suck the plunger 36. As described above, since the shaft 38 that can slide in the axial direction on the inner peripheral surface of the first core 34 is in contact with the tip of the plunger 36, the shaft 38 moves forward (see FIG. (Middle left)

  The spool device 40 includes a substantially cylindrical sleeve 41 having one end attached to the yoke 31 and the first core 34 of the solenoid drive device 30, a first land 62, a second land 64, and a third land 66. A spool 44 inserted into the inner space 45 of one end 41 and connected at one end to the tip of the shaft 38 of the solenoid drive device 30; an end plate 46 screwed to the other end of the sleeve 41; And a coil spring 48 provided between the ends and biasing the spool 44 in the direction toward the solenoid driving device 30. The end plate 46 can finely adjust the urging force of the coil spring 48 by adjusting the screw position.

  In the sleeve 41, an internal space 45 is provided in the axial direction by a through hole, and hydraulic oil pumped from an oil pump (not shown) that is formed at an approximately central position in the sleeve 41 in the figure is input as an opening of the internal space 45. Input port 52, an output port 54 that is formed on the tip side (left side in the figure) from the input port 52 and discharges hydraulic oil to the clutch CL side, and is formed on the tip side (left end side in the figure) from the output port 54. Through a drain (discharge) port 56 for discharging the hydraulic oil and an oil passage formed outside on the rear end side (right side in the figure) of the input port 52 and discharged from the output port 54. A feedback port 58 for inputting and feeding back the spool 44 is formed. As will be described in detail later, the sleeve 41 includes a first sleeve 42 that accommodates the first land 62 and the second land 64, and a second sleeve 43 that accommodates the third land 66. It is press-fitted on the side and fixed.

  The spool 44 is formed as a shaft-like member that is inserted into the internal space 45 of the sleeve 41, and the first land 62 disposed in the vicinity of the input port 52 at the substantially center of the spool device 40 and the drain port 56 side ( The second land 64 disposed on the front end side, the third land 66 disposed on the feedback port 58 side (rear end side), and the first land 62 and the second land 64 are connected to each other. The input port 52, the output port 54, and the drain are tapered to have an outer diameter smaller than the outer diameter of the first and second lands 62, 64 and a smaller outer diameter from the lands 62, 64 toward the center. A communication portion 68 capable of communicating between the ports 56 and a connection portion 69 for connecting the first land 62 and the third land 66 and feeding back the spool 44 are provided. The outer diameter (A in the figure) of the first land 62 located in the center is formed larger than the outer diameter (B in the figure) of the second land 64 and the outer diameter (C in the figure) of the third land 66. . The first land 62 controls the amount of hydraulic oil input from the input port 52 and the feedback port 58, and has a first cylindrical member 72 and a first cylinder member 72 having a smaller diameter (D in the drawing) than the first cylindrical member 72. 2 columnar members 74. The first land 62 includes a sealing surface 62a as a closing portion that is an end surface of the first cylindrical member 72 perpendicular to the sliding direction, and a second surface along the inner wall of the first sleeve 42 adjacent to the sealing surface 62a. A sliding surface 62b which is an outer peripheral surface of the cylindrical member 74 is formed. The seal surface 62 a is a surface different from the sliding surface that contacts the inner wall of the sleeve 41, and is configured as a connecting surface that connects the first columnar member 72 and the second columnar member 74. On the other hand, in the first sleeve 42 in the vicinity of the input port 52 (the front end side of the first land 62), the inner diameter of the input port 52 on the output port 54 side is an inner diameter obtained by adding a sliding clearance to the outer diameter D of the first land 62. The inner diameter of the input port 52 other than the output port 54 (feedback port 58 side) is formed to be an inner diameter obtained by adding a sliding clearance to the outer diameter A of the first land 62. Thus, the wall 41a is formed on the output port 54 side of the input port 52 by forming the inner diameter of the input port 52 on the output port 54 side smaller than the inner diameter of the feedback port 58 side, and this wall 41a. Is formed with a contact surface 42a orthogonal to the sliding direction. That is, the contact surface 42 a is formed on the wall surface of the input port 52 on the output port 54 side. Then, when the first land 62 moves to the front end side in the sliding direction, the sliding surface 62b slides while contacting the inner wall of the wall portion 41a, and then the sealing surface 62a faces the contact surface 42a of the wall portion 41a. Contact.

  Here, the assembly of the first sleeve 42 and the second sleeve 43 will be described with reference to FIG. In the spool 44, the second land 64 is inserted into the first sleeve 42 with a diameter equal to or smaller than the inner diameter of the wall portion 41 a, so that the outer diameter B of the second land 64 is smaller than the outer diameter A of the first land 62. . Further, since the cross-sectional area in the axial direction of the third land 66 is made smaller than the cross-sectional area in the axial direction of the first land 62 and the feedback force is generated, the outer diameter A of the first land 62 is It is formed larger than the outer diameter C. Thus, since the first land 62 arranged at the center has an outer diameter larger than that of the other lands, in the solenoid valve 20, the sleeve 41 is composed of two members, the first sleeve 42 and the second sleeve 43. The spool 44 is arranged in the internal space 45 of the sleeve 41. As shown in FIG. 3B, a positioning surface 43b orthogonal to the axial direction and a cylindrical standing wall 43a erected on the inner wall side of the positioning surface 43b are formed on the distal end side of the second sleeve 43. Has been. Further, an end surface 42c orthogonal to the axial direction and an insertion portion 42b provided on the inner wall side of the first sleeve 42 so that the standing wall portion 43a can be inserted from the end surface 42c are formed on the rear end side of the first sleeve 42. ing. The spool 44 is formed to have an outer diameter D or less on the front end side from the seal surface 62a, and is formed to have an outer diameter A or less on the rear end side from the seal surface 62a. On the other hand, the inner diameter of the sleeve 41 is greater than the value obtained by adding sliding clearance to the inner diameter D on the tip side from the wall 41a, and the value obtained by adding sliding clearance to the inner diameter A on the rear end side from the wall 41a. It is formed as described above. In the assembly of the first sleeve 42 and the second sleeve 43, first, the spool 44 is inserted into the internal space 45 from the rear end side of the first sleeve 42 (FIG. 3A). When the spool 44 is inserted into the first sleeve 42, the second sleeve 43 is assembled to the rear end side of the first sleeve 42 (FIG. 3B). Specifically, the standing wall portion 43a provided at the tip of the second sleeve 43 is inserted into the insertion portion 42b provided at the rear end of the first sleeve 42 until the end surface 42c and the positioning surface 43b come into contact with each other. Then, the first sleeve 42 and the second sleeve 43 are coaxially positioned, and the first sleeve 42 and the second sleeve 43 are fixed in this state (FIG. 3C). As described above, the sleeve 41 has the first sleeve 42 and the second sleeve 43 fixed to each other on the end portion side of the first land 62 different from the seal surface 62 a side that contacts the wall portion 41 a of the input port 52.

  The operation of the thus configured solenoid valve 20 of the embodiment, particularly the operation when closing the input port 52 from the initial state will be described. FIG. 4 is an explanatory diagram showing an example of the relationship between the hydraulic pressure of the output port 54 and the consumption flow rate discharged from the drain port 56 and the current of the coil 32. In the initial position where the coil 32 is not energized, as shown in FIG. 1, the spool 44 is on the solenoid drive device 30 side by the biasing force of the coil spring 48, so that the input port 52 and the output port 54 communicate with each other through the communication portion 68. The hydraulic oil input to the input port 52 is output from the output port 54, and the hydraulic pressure acting on the clutch CL is high. At this time, part of the hydraulic oil input to the input port 52 is discharged from the drain port 56 via a sliding clearance, a notch (not shown), or the like. Next, when the coil 32 is energized, the plunger 36 is attracted to the first core 34 with a suction force corresponding to the magnitude of the current applied to the coil 32, and accordingly, the shaft 38 is moved to the tip side (left side in FIG. 1). The spool 44 moves to the coil spring 48 side. At this time, the spool 44 is a position where the thrust (attraction force) of the plunger 36, the urging force of the coil spring 48, and the feedback force acting on the spool 44 due to the pressure of the hydraulic oil input from the output port 54 to the feedback port 58 are just balanced. As the current increases, the spool 44 moves to the coil spring 48 side, reducing the opening area of the input port 52 and increasing the opening area of the drain port 56. At this time, since the input port 52 is gradually closed, the input from the input port 52 gradually decreases, and the output from the output port 54 also decreases accordingly. On the other hand, since the drain port 56 is gradually opened, the consumption flow rate of the hydraulic oil discharged from the drain port 56 becomes a substantially constant value.

  Subsequently, immediately before the seal surface 62a comes into contact with the contact surface 42a of the wall portion 41a, the input from the input port 52 decreases, and the consumption flow rate discharged from the drain port 56 also decreases (FIG. 4B). . When the spool 44 moves to the most distal end side, the seal surface 62a comes into contact with the contact surface 42a of the wall portion 41a, and the input port 52 is completely blocked by the land 62 (FIG. 4C). The output port 54 and the drain port 56 communicate (see FIG. 2). As a result, the hydraulic pressure acting on the clutch CL becomes the value 0, and the consumption flow discharged from the drain port 56 also becomes the value 0. Here, a case where the seal surface 62a is not formed and the seal surface 62a and the wall portion 41a are not in contact with each other is considered. In this case, a sliding clearance is provided between the sleeve 41 and the spool 44, and even when the first land 62 closes the input port 52, hydraulic oil is always supplied from the input port 52 through this clearance. The And hydraulic oil is always discharged | emitted from the open | released drain port 56, and a consumption flow volume maintains a substantially constant value (refer the dotted line of Fig.4 (a)). On the other hand, in the solenoid valve 20 of the present embodiment, the seal surface 62a and the wall portion 41a come into contact with each other to prevent input from the input port 52, thereby reducing the consumption flow rate discharged from the drain port 56 to the value 0. It is. For this reason, for example, in a vehicle or the like, it is possible to reduce the number of revolutions of an engine or a motor that drives an oil pump supplied to the input port 52.

  According to the electromagnetic valve 20 of the present embodiment described in detail above, the spool 44 is disposed in the inner space 45 of the sleeve 41 so as to be movable in the sliding direction, and input is performed in accordance with the movement of the spool 44 in the sliding direction. The oil amount at the port 52, the output port 54, and the drain port 56 is adjusted. When the spool 44 is moved in the sliding direction, the seal surface 62a formed on the spool 44 comes into contact with the contact surface 42a of the wall portion 41a formed on the input port 52 to block the input port 52. To do. In general, a sliding clearance is provided between the spool 44 and the sleeve 41, and hydraulic oil can flow between the clearances. Here, the sliding direction is provided on the wall 41 a of the input port 52. The seal surface 62a that is orthogonal to the abutment prevents the hydraulic oil from flowing in from the input port 52. Therefore, by preventing the inflow of the hydraulic oil from the input port 52 by the surface contact, the hydraulic oil from the drain port 56 can be prevented from leaking. Moreover, since it is possible to reduce the rotation speed of the engine, motor, etc. which drive an oil pump, energy consumption can be suppressed more. Furthermore, since the seal surface 62a is a surface orthogonal to the sliding direction, it can be formed relatively easily, and as a result, it is easy to prevent leakage of hydraulic oil from the drain port 56.

  Further, since the spool 44 is formed with a sliding surface 62b that slides in contact with the inner wall in the sliding direction in the vicinity of the wall 41a of the sleeve 41, after suppressing the inflow of hydraulic oil by the sliding surface, The inflow of the hydraulic oil from the input port 52 can be prevented at the closed portion, and the inflow of the hydraulic oil from the input port 52 can be suppressed more smoothly and the leakage of the hydraulic oil from the drain port 56 can be reduced. Further, since the first land 62 that adjusts the oil amount at the input port 52 is larger than the second land 64 and the third land 66, it is easy to form the seal surface 62a, thereby preventing the hydraulic oil from leaking from the drain port 56. It's easy to do. Further, the input port 52 is further closed, and when the drain port 56 is further opened, it is possible to prevent the hydraulic oil from leaking from the drain port 56. And since the seal surface 62a of the 1st land 62 which moves to a sliding direction contacts the contact surface 42a orthogonal to a sliding direction, it is easy to contact | abut the seal surface 62a and the contact surface 42a. Furthermore, since the sleeve 41 is formed so that the inner diameter of the input port 52 on the output port 54 side is smaller than the inner diameter of the feedback port 58 side, a wall 41 a is formed on the output port 54 side. The contact surface 42a can be formed relatively easily. And since it is possible to raise each processing precision by making the sleeve 41 into a different body, coaxiality can be raised. In addition, since the first sleeve 42 and the second sleeve 43 are not fixed in the vicinity where the wall portion 41a and the seal surface 62a contact each other, the degree of blockage of the input port 52 can be increased. Easy to prevent leakage of hydraulic oil. Further, the first sleeve 42 and the second sleeve 43 are fixed in a state where the standing wall portion 43a of the first sleeve 42 is inserted into the insertion portion 42b and the end surface 42c is positioned in contact with the positioning surface 43b. Therefore, the first sleeve 42 and the second sleeve 43 can be fixed with high accuracy relatively easily.

  In addition, this invention is not limited to the Example mentioned above at all, and as long as it belongs to the technical scope of this invention, it cannot be overemphasized that it can implement with a various aspect.

  For example, in the above-described embodiment, the normally open type electromagnetic valve 20 in which the input port 52 is opened in the initial state is used. However, as shown in FIG. 5, the normally closed state in which the input port 52 is closed in the initial state. A type of electromagnetic valve 20 may be used. FIGS. 5A and 5B are configuration diagrams schematically showing the configuration of another electromagnetic valve 20B. FIG. 5A is a cross-sectional view, FIG. 5B is an explanatory view of the sleeve 41B, and FIG. 62 is a partially enlarged view of 62. FIG. In addition, the same code | symbol is attached | subjected to the structure similar to the Example mentioned above, and the description is abbreviate | omitted. FIG. 5A shows a diagram in which the solenoid driving device 30 is driven and the input port 52 is opened. The sleeve 41B of the solenoid valve 20B has an input port 52 formed at a substantially central position, an output port 54 formed on the rear end side (right side in the drawing) from the input port 52, and a rear end side (see FIG. A drain port 56 is formed on the right end side in the middle, and a feedback port 58 is formed on the tip side (left end side in the drawing) from the input port 52. In the sleeve 41B, a first sleeve 42B that accommodates the first land 62 and the second land 64 and a second sleeve 43B that accommodates the third land 66 are press-fitted and fixed on the distal end side of the first land 62. (See FIG. 5B). Similarly to the above-described embodiment, the standing wall portion 43a provided on the rear end side and the inner wall side of the second sleeve 43B is inserted into the insertion portion 42b provided on the inner wall side at the tip of the first sleeve 42B, and the end surface 42c The first sleeve 42B and the second sleeve 43B are fixed in a state where the positioning surface 43b is in contact with and positioned.

  In the electromagnetic valve 20B configured in this way, in the initial position where the coil 32 is not energized, as shown in FIG. 6, the seal surface 62a abuts against the wall portion 41a, and the input port 52 is completely blocked by the land 62. It has come off (FIG. 6B). For this reason, the hydraulic pressure output from the output port 54 has a value of 0, and the consumption flow discharged from the drain port 56 also has a value of 0. For this reason, for example, in a vehicle or the like, it is possible to reduce the number of revolutions of an engine or a motor that drives an oil pump supplied to the input port 52. Next, when the coil 32 is energized, the spool 44 moves to the tip side according to the magnitude of the current applied to the coil 32 (FIG. 6C). At this time, since the input port 52 is gradually opened, the input from the input port 52 gradually increases, and the output from the output port 54 also increases accordingly. On the other hand, the drain port 56 is gradually closed, but the input from the input port 52 also increases, so that the consumption flow rate of the hydraulic oil discharged from the drain port 56 becomes a substantially constant value (FIG. 6A). Thus, also in the solenoid valve 20B, the effect similar to the Example mentioned above is acquired.

  In the embodiment described above, the seal surface 62a and the contact surface 42a of the wall 41a with which the seal surface 62a contacts are formed as surfaces orthogonal to the sliding direction. As shown, the seal surface 162a formed on the first land 162 and the contact surface 142a of the wall 141a formed on the first sleeve 142 may not be orthogonal to the sliding direction. 7A and 7B are explanatory views of another closed portion and a wall portion. FIG. 7A is an explanatory view of the sealing surface 162a, FIG. 7B is an explanatory view of the closed portion 262a, and FIG. It is explanatory drawing of the part 241a. FIG. 7A shows a sealing surface 162a formed on an acute angle surface and a wall portion 141a in surface contact therewith. Even in this case, leakage of hydraulic fluid from the drain port 56 can be prevented by reliably preventing the hydraulic fluid from flowing in from the input port 52 by surface contact. In addition, it is good also as what forms a contact surface of the wall part which can form a sealing surface in an obtuse angle | corner surface and can contact this.

  In the embodiment described above, the sealing surface 62a as the blocking portion and the surface of the wall portion 41a of the first sleeve 42 are in contact with each other to prevent the hydraulic oil from flowing in from the input port 52. As shown in b), a first land 262 having a closed end 262a at the tip of an acute angle surface is formed, and the closed portion 262a is in line contact with the wall 41a to prevent the inflow of hydraulic oil from the input port 52. Also good. Even in this case, the leakage of the hydraulic oil from the drain port 56 can be further suppressed by preventing the hydraulic oil from flowing in from the input port 52.

  In the embodiment described above, the seal surface 62a of the spool 44 is in contact with the contact surface 42a of the wall 41a provided on the wall surface of the input port 52 on the output port 54 side. For example, FIG. ), A contact surface 242a of the wall portion 241a may be provided on a surface different from the wall surface 241b of the input port 52, and the seal surface 62a of the spool 44 may be in contact with the contact surface 242a. That is, the wall portion 241a may be provided in the vicinity of the input port 52, or may be provided at a position shifted from the wall surface 241b of the input port 52 to the output port 54 side. Even in this case, it is possible to prevent the hydraulic oil from leaking from the drain port 56 by preventing the hydraulic oil from flowing in from the input port 52. In the above-described embodiment, the contact surface 42a is formed as a surface orthogonal to the sliding direction. However, the present invention is not limited to this, and may be a surface having a predetermined angle with respect to the sliding direction. . 7A to 7C may be applied to the contact surface as far as possible, or the contact surfaces shown in FIGS. 7A to 7C. This aspect may be applied to the sealing surface as far as possible.

  In the above-described embodiment, the first sleeve 42 and the second sleeve 43 are inserted into the insertion portion 42 b formed inside the first sleeve 42 by inserting the standing wall portion 43 a provided on the inner peripheral surface side of the second sleeve 43. Is assembled into the spool device 40 (see FIG. 3). As shown in FIG. 8A, the outer periphery of the second sleeve 343 is inserted into the insertion portion 342b provided on the outer peripheral surface side of the first sleeve 342. As a spool device 340 in which the standing wall portion 343a provided on the side is inserted, the positioning surface 343b provided on the inner side of the standing wall portion 343a and the end surface 342c come into contact with each other, and the first sleeve 342 and the second sleeve 343 are assembled. Also good. Further, as shown in FIG. 8B, the standing wall portion 443a provided on the outer peripheral side of the second sleeve 443 is inserted into the insertion portion 442b provided on the outer peripheral surface side of the first sleeve 442, and the standing wall portion 443a. A normally closed type spool device 440 in which the first sleeve 442 and the second sleeve 443 are assembled by abutting a positioning surface 443b and an end surface 442c provided on the inner side of the sleeve 440 may be used. Alternatively, a standing wall portion and a positioning surface may be provided on the first sleeve side, and an insertion portion and an end surface may be provided on the second sleeve side to assemble the first sleeve and the second sleeve.

  In the above-described embodiment, the first sleeve 42 and the second sleeve 43 are fixed on the rear end side (the right side in FIG. 1) of the first land 62. The two sleeves 43 may be divided and fixed. For example, the first sleeve 42 and the second sleeve 43 may be divided and fixed on the front end side of the first land 62 (left side in FIG. 1). In consideration of leakage of hydraulic oil, it is preferable that the first sleeve 42 and the second sleeve 43 are not fixed in the vicinity where the seal surface 62a and the wall portion 41a contact each other.

  In the embodiment described above, the electromagnetic valve 20 is configured as a linear solenoid valve for direct control capable of directly controlling the clutch CL. However, the present invention is applicable to a configuration configured as a linear solenoid valve for pilot control. May be applied.

  The present invention can be used in the electromagnetic valve manufacturing industry.

It is a block diagram which shows the outline of a structure of the solenoid valve 20 which is one Example of this invention. It is explanatory drawing of the solenoid valve 20 when the input port 52 is obstruct | occluded. FIG. 3A is an explanatory view of an example of the assembly of the first sleeve 42 and the second sleeve 43, FIG. 3A is a view in which the spool 44 is inserted into the first sleeve 42, and FIG. FIG. 3 (c) is a diagram after assembly to the first sleeve 42. FIG. FIG. 6 is an explanatory diagram showing an example of the relationship between the hydraulic pressure of the output port 54 and the consumption flow rate discharged from the drain port 56 and the current of the coil 32. FIG. 5A is a configuration diagram showing an outline of the configuration of another electromagnetic valve 20B, FIG. 5A is a sectional view, FIG. 5B is an explanatory view of a sleeve 41B, and FIG. 5C is a partially enlarged view of a first land 62. FIG. FIG. 6 is an explanatory diagram showing an example of the relationship between the hydraulic pressure of the output port 54 and the consumption flow rate discharged from the drain port 56 and the current of the coil 32. It is explanatory drawing of another obstruction | occlusion part and a wall part, FIG. 7 (a) is explanatory drawing of the sealing surface 162a, FIG.7 (b) is explanatory drawing of the obstruction | occlusion part 262a, FIG.7 (c) is description of wall part 241a. FIG. 8A and 8B are explanatory diagrams of another spool device, in which FIG. 8A is a normally open type and FIG. 8B is a normally closed type.

Explanation of symbols

  20, 20B Solenoid valve, 30 Solenoid drive, 31 Yoke, 32 Coil, 32a Bobbin, 34 First core, 34a Flange, 34b Cylindrical part, 35 Second core, 36 Plunger, 38 Shaft, 39 Terminal, 40, 340 , 440 Spool device, 41, 41B Sleeve, 41a, 141a, 241a Wall part, 42, 42B, 142, 342, 442 First sleeve, 42a, 142a, 242a Contact surface, 42b, 342b, 442b Insertion part, 42c, 342c, 442c End surface, 43, 43B, 343, 443 Second sleeve, 43a, 343a, 443a Standing wall, 43b, 343b, 443b Positioning surface, 44 Spool, 45 Internal space, 46 End plate, 48 Coil spring, 52 Input port, 54 output ports 56 Drain port, 58 Feedback port, 62, 162, 262 First land, 62a, 162a Sealing surface, 62b Sliding surface, 64 Second land, 66 Third land, 68 Communication portion, 69 Connection portion, 72 First cylinder Member, 74 2nd cylindrical member, 262a obstruction | occlusion part.

Claims (10)

A sleeve in which an input port, an output port, and a discharge port through which fluid flows are formed, and an internal space in which fluid can flow is formed;
The internal space is movable in the sliding direction, and the amount of fluid in the input port, the output port, and the discharge port is adjusted along with the movement in the sliding direction. and a spool closing portion for closing the wall portion formed on the input port side abuts the input port of the sleeve is formed,
The spool is a surface different from a sliding surface that slides in contact with the inner wall of the sleeve, and the closing portion is formed as a sealing surface that contacts the wall portion,
The spool includes a first land for adjusting a fluid amount at the input port, and the first land includes a first cylindrical portion and a second cylindrical portion having a smaller diameter than the first cylindrical portion, The outer peripheral surface of the second cylindrical portion is a sliding surface that slides in contact with the inner wall in the sliding direction adjacent to the wall portion of the sleeve, and the connecting surface between the first cylindrical portion and the second cylindrical portion is The blocking portion,
Spool device. 2. The spool device according to claim 1 , wherein the spool has a closing portion that abuts against the wall portion as a surface orthogonal to the sliding direction. The said spool is formed adjacent to the said closure part, The sliding surface which contacts and slides the inner wall of the sliding direction adjacent to the said wall part of the said sleeve is formed in Claim 1 or 2 The spool device described. The spool, adjusting the amount of fluid in the discharge port to the previous SL said first lands are formed in a smaller diameter than the first land moves sliding direction for closing the input port to open the discharge port second and a run-time the spool device according to any one of claims 1-3. The sleeve is formed with an abutting surface perpendicular to the sliding direction on the wall portion,
The spool device according to any one of claims 1 to 4 , wherein the blocking portion is in contact with the contact surface. Wherein the sleeve, the wall portion on the output port side by the inner diameter of the output port side of the input port is formed smaller than the inner diameter of the side not the output port side are formed, according to claim 1 to 5 The spool device according to any one of the above. The spool device according to claim 4 , wherein the sleeve is formed by a first sleeve that accommodates the first land and the second land, and a second sleeve fixed to the first sleeve. The spool device according to claim 7 , wherein the first sleeve and the second sleeve are fixed to each other on an end side of the first land different from a side on which the wall portion and the blocking portion abut. . In the sleeve, either one of the first sleeve and the second sleeve is provided with an upright wall portion at the axial end portion and a positioning surface adjacent to the upright wall portion, and at the other end in the axial direction. An insertion portion into which the standing wall portion can be inserted and an end surface adjacent to the insertion portion are provided at the portion, and the standing wall portion is inserted into the insertion portion, and the end surface is in contact with the positioning surface to be positioned. The spool device according to claim 7 or 8 , wherein the first sleeve and the second sleeve are fixed in a closed state. The spool device according to any one of claims 1 to 9 ,
A solenoid driving device having a coil, a yoke, and a plunger slidable in a sliding direction, and moving the spool in the sliding direction by sliding of the plunger;
Linear solenoid valve with

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