JP6050705B2 - solenoid valve - Google Patents

Description

  The present invention relates to an electromagnetic valve applied to, for example, a vehicle brake device.

  As a conventional electromagnetic valve, for example, a normally closed pressure reducing valve used in a brake device of a vehicle having a function such as ABS described in Patent Document 1 below is known.

  Briefly, this pressure reducing valve is formed in a cylindrical shape and generates electromagnetic force by energization, a cylindrical member provided inside the cylindrical shape of the solenoid, and welded to an upper end portion inside the cylindrical member. A fixed iron core made of a magnetic material fixed by the like, a plunger that is slidably accommodated in the longitudinal direction while being guided by the inner peripheral surface of the cylindrical member, and a ball valve body that is caulked and fixed to the tip of the plunger, A valve spring for urging the plunger in the valve closing direction; and a valve seat on which the ball valve body is separated when the plunger slides in the axial direction by the electromagnetic force of the solenoid and the spring force of the valve spring. And the sheet member having a portion. In addition, a fluid path is formed in the space between the distal end outer peripheral portion of the plunger and the inner peripheral portion of the seat member so that the brake fluid communicates from the wheel cylinder side to the master cylinder and the plunger pump side.

  The pressure reducing valve is housed in a valve holding hole formed in the brake fluid passage leading from the master cylinder to the wheel cylinder in the housing of the brake device, and brake fluid is supplied from the wheel cylinder side to the housing in the ABS operation. It has a function of reducing the hydraulic pressure in the brake device by communicating with the reservoir tank side.

JP-T-2004-505834

  However, in the electromagnetic valve (pressure reducing valve) described in Patent Document 1, the seat member is formed to extend in the depth direction of the valve holding hole, and the ball valve is disposed at the front end side of the seat member. A valve seat part is formed on which the body is seated.

  For this reason, the plunger is set to have a long shaft length in accordance with the formation position of the valve seat portion of the seat member, and the outer peripheral surface on the fixed iron core side and the cylindrical shape on which the outer peripheral surface is slidably guided. The length of the guide surface between the inner peripheral surface of the member is shorter than the axial length of the plunger. That is, the distal end side where the valve body is provided is not guided and supported by the inner peripheral surface of the cylindrical member.

  As a result, due to the clearance between the inner peripheral surface of the cylindrical member and the outer peripheral surface of the plunger, the plunger is inclined to increase the swinging width, and the seating point of the plunger valve body with respect to the valve seat portion is shifted to provide a sealing property. May get worse.

  The present invention has been devised in view of the actual situation of the conventional electromagnetic valve, and the axial length of the plunger can be increased by arranging the position of the valve seat portion of the seat member having two members close to the plunger side. Provided is an electromagnetic valve that can be shortened to suppress the inclination of the plunger and to suppress the deviation of the seating point of the valve body of the plunger with respect to the valve seat portion, thereby improving the sealing performance.

The invention according to claim 1 includes a solenoid that generates an electromagnetic force when energized, a cylindrical member made of a non-magnetic material disposed on an inner periphery of the solenoid, and a magnetic body. A bottomed member that is slidably guided on the inner peripheral surface, moves in the axial direction by the suction force of the solenoid, has a movable member provided with a valve body on the tip side, and a first opening opened at one end. A first member formed in a cylindrical shape, having a through hole formed in the peripheral wall and having a first passage hole formed in the bottom wall, the first opening side being connected to the cylindrical member; The second opening is formed in a cylindrical shape having a second opening that is open at one end, the second opening is liquid-tightly fixed to the first opening from the axial direction, and is formed on the lid wall. A second passage hole communicating with the one passage hole from the axial direction, and an outside of the second passage hole A valve seat portion formed at a hole edge, and a second member that opens and closes the second passage hole by the valve body being attached to and detached from the valve seat portion via the movable member. Prepared,
The valve seat portion is arranged on the solenoid side with respect to the through hole.

  The axial length of the movable member can be shortened by disposing the position of the valve seat portion of the seat member composed of two parts, the first member and the second member, close to the movable member side. Thereby, the inclination of the movable member due to the clearance between the inner peripheral surface of the cylindrical member and the outer peripheral surface of the movable member is suppressed, and the seating property of the valve body of the movable member and the valve seat portion of the seat member is improved. Thus, the sealing performance is improved.

1 is a longitudinal sectional view of a first embodiment in which a solenoid valve according to the present invention is applied to a brake hydraulic device of a vehicle. It is a hydraulic circuit diagram of a brake hydraulic device in the present embodiment. It is a longitudinal cross-sectional view of the plunger (movable member) provided for this embodiment. It is a longitudinal cross-sectional view of the 1st member provided for this embodiment. It is a longitudinal cross-sectional view of the 2nd member provided for this embodiment. It is a longitudinal cross-sectional view which shows 2nd Embodiment of the solenoid valve which concerns on this invention. It is a longitudinal cross-sectional view which shows 3rd Embodiment of the solenoid valve which concerns on this invention. It is a longitudinal cross-sectional view of the 1st member and 2nd member which are provided to the same 3rd embodiment. It is a longitudinal cross-sectional view which shows 4th Embodiment of the solenoid valve which concerns on this invention.

Hereinafter, each embodiment of the solenoid valve used for the brake device concerning the present invention is explained in full detail based on a drawing. In this embodiment, the present invention is applied to a pressure reducing valve of a vehicle brake hydraulic device that controls normal braking, ABS, and behavior of the vehicle.
[First Embodiment]
As shown in the hydraulic pressure circuit of FIG. 2, the brake hydraulic device 1 includes a master cylinder 3 that generates a brake pressure having a height corresponding to the depression amount of the brake pedal 2, and the master cylinder 3 and the front left and right (FR, FL) side and rear wheel left and right (RR, RL) side wheel cylinders 4 that are the first oil passages that communicate with each other, and each main passage 5 is provided with each main cylinder 5 from the master cylinder 3 to each wheel cylinder 4 are provided in four normally open solenoid type pressure increasing valves 6 and normally closed solenoid type pressure reducing valves 7 that respectively control the brake fluid pressure to 4 and two sub passages 8 branched from each main passage 5. Two plunger pumps 9 for discharging the brake fluid pressure to the wheel cylinders 4 and two tanks for storing the brake fluid discharged from the wheel cylinders 4 through the pressure reducing valves 7. And Batanku 10, and a, a pump motor 41 for operating the respective plunger pump 9.

  Each pressure increasing valve 6 controls the brake fluid pressure from the master cylinder 3 to be supplied to each wheel cylinder 4 during normal braking operation, while each pressure reducing valve 7 is opened when the ABS is operated. The brake fluid in each wheel cylinder 4 is returned to each reservoir tank 10 for temporary storage, and each of the pressure-increasing and reducing valves 6 and 7 is opened and closed by a controller (not shown). The brake fluid pressure in the wheel cylinder 4 is increased, reduced and maintained. Each of the pressure increasing / decreasing valves 6 and 7 is opened / closed by energizing or de-energizing electronic components described later that operate based on a control signal from the controller.

  Also, the brake fluid temporarily stored in each reservoir tank 10 is operated by the plunger motor 9 by the pump motor 41, and two brake fluids provided between the master cylinder 3 and the pressure increasing valves 6 are provided. It returns to the external reservoir tank 13 on the master cylinder 3 side through the gate-out valve 12.

  In each of the sub passages 8, two gate-in valves 11 provided between the master cylinder 3 and the plunger pumps 9, the gate-out valves 12, and the pump motors 41 are operated. Plunger pump 9 is provided.

  Each of the gate-in valves 11 is a normally closed solenoid type electromagnetic on-off valve, which is closed during normal braking or ABS operation, and is opened only during behavior control. On the other hand, each of the gate-out valves 12 is a normally-open solenoid type electromagnetic on-off valve that is opened during normal braking and ABS operation, and is closed when the pressure is increased during behavior control.

  At the time of pressure increase during the behavior control of the vehicle, each plunger pump 9 is operated by a pump motor 41, and each pressure increase valve 6 and each gate-out valve 12 are closed while the gate-in valve 11 is closed. Is opened, and the brake fluid of the master cylinder 3 passes through the sub-passage 8 by each plunger pump 9, and the brake fluid is pressure-fed through the pressure-increasing valves 6 to the wheel cylinder 4 to which the hydraulic pressure is to be applied. ing.

  As shown in FIG. 1, each pressure reducing valve 7 is press-fitted and fixed in a valve holding hole 15 of a housing 14 of the brake hydraulic device 1.

  As shown in FIG. 1, the valve holding hole 15 is formed in a stepped shape, and is composed of a large diameter portion 15a, a medium diameter portion 15b, and a small diameter portion 15c in order from the open side. One end opening 5a on the side of each pressure increasing valve 6 of the main passage 5 is formed on the side surface of the medium diameter portion 15b, and the bottom surface of the small diameter portion 15c is connected to the reservoir tank 10 side. The other end opening 16a of the decompression passage 16 which is the second oil passage is formed.

  As shown in FIG. 1, each of the pressure reducing valves 7 includes a solenoid 17 that generates electromagnetic force when energized, a cylindrical member 18 that is disposed on the inner peripheral portion of the solenoid 17 and is made of a nonmagnetic material, and the cylindrical shape. A fixed iron core 19 provided at the upper end portion 18a of the member 18, a plunger 20 which is a movable member slidably accommodated inside the cylindrical member 18, and a ball-like valve provided at the tip of the plunger 20 Body 21, valve spring 42 for urging the plunger 20 in the advancing direction, and when the plunger 20 slides in the axial direction by the electromagnetic force of the solenoid 17 and the spring force of the valve spring 42. And a seat member 22 having a valve seat portion 33 on which 21 is seated.

  The cylindrical member 18 has the fixed iron core 19 fixed to the upper end portion 18a by welding, and the lower end portion 18b formed in a stepped diameter increasing shape toward the outer side in the circumferential direction.

  In addition, an annular fixed bush 39 is provided on the outer periphery of the fixed portion 18d at the upper portion of the lower end portion 18b of the cylindrical member 18. The fixed bush 39 is fitted from the upper end in the axial direction of the fixed core 19 and is press-fitted and fixed to the outer peripheral surface of the fixed portion 18d. Further, the upper end of the large diameter portion 15a of the valve holding hole 15 of the housing 14 is caulked to form a caulking portion 15d, and the fixing bush 39 is fixed to the housing 14 by the caulking portion 15d.

  As shown in FIGS. 1 and 3, the plunger 20 is slidably accommodated in the longitudinal direction while the outer peripheral surface 20a is guided by the inner peripheral surface of the cylindrical member 18, and the lower end portion 20b has the A bulged holding groove 20c for holding the valve body 21 is integrally formed. The plunger 20 is set to a relatively short axial length that fits within the axial length of the cylindrical member 18.

  The valve body 21 is caulked and fixed in a holding groove formed in the holding groove 20 c of the plunger 20.

  The valve spring 42 is elastically mounted between a seat surface of a cylindrical groove formed at the upper end portion of the plunger 20 and the lower surface of the fixed iron core 19, and the urging force of the valve spring 42 causes the plunger 20 to close in the valve closing direction. Is urged in the axial direction on the sheet member 22 side.

  The sheet member 22 is composed of upper and lower two members in the figure, a first member 23 and a second member 24, and the second member 24 is press-fitted and fixed to the first member 23 from the axial direction.

  As shown in FIGS. 1 and 4, the first member 23 is formed in a bottomed cylindrical shape by press molding, and the upper end side has a first peripheral wall 25 having a maximum diameter, a second peripheral wall 26 having a medium diameter, and a third peripheral wall. The peripheral wall 27 and the fourth peripheral wall 28 having the smallest diameter are formed in a stepped shape so that the diameter is reduced from the first opening 23a side where one end on the plunger 20 side is opened toward the bottom 23b which is the bottom wall. Yes.

  The first peripheral wall 25 is provided such that an outer peripheral surface 25 a is press-fitted and fixed to an inner peripheral surface of a lower end portion 18 b of the cylindrical member 18 and extends the cylindrical member 18. The second peripheral wall 26 has a large-diameter passage hole 29 that is a plurality of through-holes formed in the side portion so as to penetrate therethrough along the radial direction.

  Further, the first peripheral wall 25 and the second peripheral wall 26 are formed in a stepped shape at the inner periphery and the outer periphery by press molding. The press-molding pressure causes work hardening in the first and second peripheral walls 25, 26, and the work hardening improves the rigidity of the first peripheral wall 25 and the second peripheral wall 26, and the large-diameter passage hole. The distortion of the first peripheral wall 25 when forming 29 can be suppressed.

  The third peripheral wall 27 is formed to have an outer diameter slightly smaller than the outer diameter of the second peripheral wall 26, while the inner diameter is smaller than the inner diameters of the first and second peripheral walls 25 and 26. In addition, the second member 24 is press-fitted into the inner peripheral surface 27b, and a cylindrical filtering 38 is press-fitted and fixed between the outer peripheral surface 27a and the outer peripheral surface of the lower end portion 18b of the cylindrical member 18. Yes.

  The filtering 38 is formed with a plurality of through holes 38a penetrating in a radial direction at a circumferential position, and a filter 38b for filtering brake fluid is provided in the through hole 38a. The filtering 38 faces the inner peripheral surface of the middle diameter portion 15b of the valve holding hole 15 and the one end opening 5a of each main passage 5 with a slight gap.

  A cylindrical first liquid passage 35 communicating with each main passage 5 is formed in the space between the outer peripheral surfaces of the second peripheral wall 26 and the third peripheral wall 27 and the inner periphery of the filtering 38. .

  The fourth peripheral wall 28 has an outer peripheral surface 28 a press-fitted into the small diameter portion 15 c of the valve holding hole 15. Further, a step portion 23 e is formed between the third peripheral wall 27 and the fourth peripheral wall 28.

  A cylindrical press-fitting jig can be brought into contact with the stepped portion 23e from the lower end side in the axial direction. Therefore, when the first member 23 is press-fitted into the cylindrical member 18, the bottom portion 23b is formed. In addition, it is possible to suppress deformation of the first passage hole 30 that may be caused by the pressure acting directly on the first passage hole 30 described later and its periphery. In addition, since the inner periphery of the stepped portion 23e can be used as a stopper when the second member 24 is press-fitted, workability can be improved.

  The bottom portion 23 b has a small-diameter first passage hole 30, which is an orifice, formed in the center in the axial direction, and a concave portion 23 d is formed in the upper portion of the first passage hole 30. That is, the first passage hole 30 is formed by forming in advance a recess 23d having a larger inner diameter than the first passage hole 30 on the inner bottom surface of the bottom 23b, and then penetrating the recess 23d. Yes. As a result, the work of forming the first passage hole 30 is facilitated.

  Further, by forming the first passage hole 30 in the bottom 23b of the first member 23, it is possible to form the orifices in the peripheral walls 25 to 28 more easily than the orifices, thereby improving productivity. be able to.

  As shown in FIGS. 1 and 5, the second member 24 is formed into a covered cylindrical shape by press molding, and the small diameter portion 32 and the large diameter portion 31 having a larger diameter than the small diameter portion 32 are arranged in this order from the upper side in the drawing. It is formed in a stepped diameter increasing shape.

  The large-diameter portion 31 has an outer diameter that is smaller than the inner diameters of the first and second peripheral walls 25 and 26, and an outer peripheral surface 31 a that is the inner peripheral surface 27 b of the third peripheral wall 27 of the first member 23. The second opening 24 b on the lower end side is disposed so as to face the first passage hole 30.

  The small-diameter portion 32 has a cylindrical second liquid passage 36 formed between the outer peripheral surface and the inner peripheral surfaces of the first peripheral wall 25 and the second peripheral wall 26 and between the lower end side of the plunger 20. The second liquid path 36 communicates with the first liquid path 35. Since the small diameter portion 32 is formed to have an inner diameter and an outer diameter smaller than those of the large diameter portion 31, a wide space for the second liquid passage 36 can be secured.

  Further, a step portion 24 c is formed between the large diameter portion 31 and the small diameter portion 32, and the step portion 24 c allows the second member 24 to be connected to the inner periphery of the third peripheral wall 27 of the first member 23. When press-fitting into the surface 27b, a press-fitting jig (not shown) can be brought into contact. Thereby, when the large-diameter portion 31 of the second member 24 is press-fitted into the inner peripheral surface 27 b of the third peripheral wall 27 of the first member 23, pressure is directly applied to the valve seat portion 33 and its periphery. The deformation | transformation of the valve seat part 33 which may arise can be suppressed.

  Further, the lid wall 24a at the upper end of the second member 24 has a second passage hole 34 penetratingly formed along the vertical direction at the center position, and the upper end hole edge of the second passage hole 34 has A spherical valve seat portion 33 is formed. The valve seat portion 33 is formed in a tapered shape with a reduced diameter in the axial direction of the second passage hole 34, and the tubular member is larger than the large diameter passage hole 29 of the first member 23. It is formed on the 18th side.

  The plunger 20 is lifted and slid by the electromagnetic force of the solenoid 17 to the valve seat 33 to separate the valve body 21 and open the second passage hole 34, while the electromagnetic force of the solenoid 17 is demagnetized. Then, the plunger 20 slides downward by the spring force of the valve spring 42, the valve body 21 is seated, and the second passage hole 34 is closed.

Further, when the third liquid passage 37 is formed on the inner peripheral surface of the second member 24 and the inner periphery of the fourth peripheral wall 28 of the first member 23 and the second passage hole 34 is opened, the main passage The passage 5 communicates with the two decompression passages 16 through the liquid passages 35 to 37.
[Effects of First Embodiment]
Hereinafter, the effect of this embodiment is demonstrated.

  Therefore, according to this embodiment, when the ABS is operated while the vehicle is running, each pressure increasing valve 6 is closed and the brake fluid from the master cylinder 3 is cut, while each pressure reducing valve 7 is Is opened and the hydraulic pressure applied to each wheel cylinder 4 is temporarily stored in each reservoir tank 10, and brake fluid passes through each gate-out valve 12 by each plunger pump 9 operated by the pump motor 41. To the master cylinder 3. Then, by opening / closing the increase / decrease valves 6 and 7 by a controller (not shown), the hydraulic pressure in the brake hydraulic device 1 is increased / decreased so that the tire is not locked.

  Further, when behavior control is performed while the vehicle is running and the pressure is increased, each gate-out valve 12 is closed, while each gate-in valve 11 is opened, and each plunger pump 9 is used as a master cylinder. The brake fluid is sucked from 3 through each sub-passage 8. And brake fluid is pumped through each said pressure increase valve 6 connected to the said wheel cylinder 4 which wants to apply hydraulic pressure.

  When the solenoid 17 is not energized by the controller, that is, when the ABS is not operated, each pressure reducing valve 7 comes into contact with the valve seat 33 of the second member 24 and the second passage hole 34. To prevent the brake fluid from the main passages 5 from communicating with the decompression passages 16 side, when the ABS is operated, the solenoid 17 is energized by the controller. The plunger 20 is sucked to the fixed iron core 19 side, the valve body 21 is separated from the valve seat portion 33, and brake fluid is supplied from the main passage 5 side to the pressure reducing passages via the liquid passages 35 to 37. 16 communicates. As a result, the hydraulic pressure applied to each wheel cylinder 4 is sent from the main passage 5 side to the pressure reduction passage 16 side via the liquid passages 35 to 37, and temporarily sent to the reservoir tanks 10. By storing it, the fluid pressure is released and the pressure is reduced.

  In this embodiment, the seat member 22 is composed of two members, the first member 23 and the second member 24, and the formation position of the valve seat portion 33 of the second member 24 is compared with the prior art. Therefore, the entire length from the end surface of the plunger 20 on the fixed iron core 19 side to the valve body 21 can be shortened accordingly. Further, since the entire outer peripheral surface 20a of the plunger 20 is always guided (supported) by the inner peripheral surface 18c of the cylindrical member 18, the plunger 20 slides in the cylindrical member 18. Even when tilted by the clearance between the inner peripheral surface of the tubular member 18 and the outer peripheral surface of the plunger 20, the seat when the valve element 21 comes into contact with the valve seat portion 33 when each pressure reducing valve 7 is closed. It is possible to suppress the point from shifting.

  Further, in the prior art, the valve seat portion is formed on the portion of the seat member that is press-fitted into the housing, that is, on the bottom side of the seat member. Therefore, when the seat member is press-fitted and fixed in the housing, When the valve seat is deformed by press-fitting and the valve body is seated on the valve seat portion, the seating point is shifted, and the sealing performance of the valve body may be deteriorated.

  On the other hand, in the present embodiment, the seat member 22 has two member configurations, the first member 23 and the second member 24, and is press-fitted into the valve seat portion 33 and the housing of the second member 24. The fourth peripheral wall 28 of the first member 23 is a separate part. For this reason, the position of the valve seat portion 33 where the valve body 21 comes into contact with the fourth peripheral wall 28 press-fitted into the small diameter portion 15c of the valve holding hole 15 is separated, and the valve seat portion 33 becomes the plunger. Since the valve seat portion 33 is arranged close to the 20 side, the valve seat portion 33 is not affected by deformation due to press fitting. Therefore, also in this respect, when the valve body 21 is seated on the valve seat portion 33, the seating point becomes difficult to shift, and it is possible to prevent the sealing performance of the valve body 21 from being deteriorated.

  Further, as described above, the third peripheral wall 27 of the first member 23 is formed in a step shape between the third peripheral wall 27 and the fourth peripheral wall 28. That is, if the third peripheral wall 27 and the fourth peripheral wall 28 are formed on the same surface, a force to spread outwardly due to the press-fitting of the second member 24 is applied to the housing 14. Although the press-fit load is excessive, the first member is formed by forming the third peripheral wall 27 press-fitting the second member 24 and the fourth peripheral wall 28 press-fitted into the housing 14 into a step shape. 23 is work hardened, and the press-fitting of the second member 24 prevents the fourth peripheral wall 28 of the first member 23 from being spread outward, so that the press-fitting load can be prevented from becoming excessive.

  Further, the outer peripheral surface 31a of the large-diameter portion 31 of the second member 24 provided with the valve seat portion 33 is press-fitted and fixed in the inner peripheral surface 27b of the third peripheral wall 27 of the first member 23. Since the valve seat portion 33 does not move in the axial direction carelessly, the valve body 21 of the plunger 20 is brought into contact with the valve seat portion 33 by the urging force of the valve spring 42 when each pressure reducing valve 7 is closed. When contacted, the sealing performance can be improved.

  Further, since the first member 23 and the second member 24 are formed by press molding, the cost can be reduced.

  As described above, the large-diameter portion 31 has an outer diameter smaller than the inner diameters of the first and second peripheral walls 25 and 26, and an outer peripheral surface 31 a is the third peripheral wall of the first member 23. The second opening 24 b on the lower end side is press-fitted into the inner peripheral surface 27 b of the outer peripheral surface 27, and is disposed so as to face the first passage hole 30. Accordingly, when the large-diameter portion 31 of the second member 24 is press-fitted into the inner peripheral surface 27b of the third peripheral wall 27, the first and second peripheral walls 25 and 26 do not have the same inner diameter. The press-in workability can be improved by shortening. Moreover, only the necessary part can be finished by limiting the pressed-in part. Specifically, since the outer peripheral surface 25a of the first peripheral wall 25 is press-fitted into the inner peripheral surface of the lower end portion 18b of the tubular member 18, finishing is necessary. However, since the press-fitted portion is limited, finishing of the inner peripheral surfaces of the first peripheral wall 25 and the second peripheral wall 26 becomes unnecessary. Thus, productivity can be improved.

Further, the first member 23 can be sealed without an O-ring because it is press-fitted and fixed to the housing 14 in a liquid-tight manner.
[Second Embodiment]
FIG. 6 shows a second embodiment in which the structure of the small diameter portion 32 of the second member 24 is changed and the structure of the plunger 20 is changed.

  That is, the plunger 20 has a cylindrical recess 20d formed on the lower surface of the lower end 20b, and the holding groove 20c is formed in the center of the recess 20d, and the valve body 21 is fixed by caulking thereto. .

  The small-diameter portion 32 is formed in an elongated cylindrical shape with the axial length extending toward the plunger 20, and a second passage hole 34 and a valve seat portion 33 are formed in the center of the lid wall 24a.

  Therefore, according to this embodiment, the axial length of the small diameter portion 32 is extended to the plunger 20 side so that the valve seat portion 33 is arranged closer to the solenoid 17 side, and the plunger 20 By forming a recess 20d in the lower end 20b of the cylinder and forming the holding groove 20c in the center of the recess 20d, the valve element 21 that is caulked and fixed in the holding groove 20c is brought closer to the fixed core 19 side. be able to. As a result, the outer peripheral surface 20a of the plunger 20 is guided by the inner peripheral surface 18c of the cylindrical member 18, and stable slidability can be obtained, so that the inclination of the plunger 20 is further suppressed than in the first embodiment. In addition, the position of the valve seat portion 33 on which the valve body 21 is separated and seated is arranged close to the solenoid 17 side, so that the valve body 21 at the tip end of the plunger 20 is seated on the valve seat portion 33. The displacement of the seating point can be further suppressed than in the first embodiment.

Since the other configuration is the same as that of the first embodiment, the same effect as that of the first embodiment can be obtained.
[Third Embodiment]
7 and 8 show a third embodiment in which the structure of the second peripheral wall 26 of the first member 23 is changed and the structure of the small diameter portion 32 of the second member 24 is changed.

  That is, the inner diameter and outer diameter of the second peripheral wall 26 of the first member 23 are set to be the same as the inner diameter and outer diameter of the first peripheral wall 25 and are formed in a straight shape.

  The inner diameter and outer diameter of the small diameter portion 32 of the second member 24 are set to be the same as the large diameter portion 31.

Therefore, according to this embodiment, the inner diameter and outer diameter of the second peripheral wall 26 of the first member 23 are set to be the same as the inner diameter and outer diameter of the first peripheral wall 25 and are formed in a straight shape. Since the inner diameter and the outer diameter of the small-diameter portion 32 of the second member 24 are set to be the same as those of the large-diameter portion 31, it is possible to facilitate the molding when the second member 24 is press-molded.
Since the other configuration is the same as that of the first embodiment, the same effect as that of the first embodiment can be obtained.
[Fourth Embodiment]
FIG. 9 shows a fourth embodiment in which the orifice is formed by a member (resin member) separate from the first passage hole 30.

  That is, the orifice member 40 is provided inside the large diameter portion 31 of the second member 24.

  The orifice member 40 is formed in a cylindrical shape by a resin material, is press-fitted and fixed to the inner peripheral portion 31b of the large-diameter portion 31, and has a small-diameter passage hole 40a penetratingly formed in the central axis direction.

  Further, the orifice member 40 is formed with a first tapered surface 40d and a second tapered surface 40e which are reduced in diameter toward the axial direction of the small diameter passage hole 40a at the upper end portion 40b and the lower end portion 40c, respectively. .

  Therefore, according to this embodiment, the first passage hole is provided by providing the orifice member 40 in the third liquid passage 37 between the first passage hole 30 and the second passage hole 34. The diameter of 30 can be increased. As a result, the accuracy of the first passage hole 30 becomes unnecessary, so that workability can be improved.

  Since the other configuration is the same as that of the first embodiment, the same effect as that of the first embodiment can be obtained.

  The present invention is not limited to the configuration of each of the embodiments described above, and the configuration can be changed without departing from the spirit of the invention.

  The technical ideas of the invention other than the claims ascertained from the embodiment will be described below.

[Claim a] In the solenoid valve according to claim 1,
The electromagnetic valve, wherein the second member is formed by press molding.

  According to this invention, the cost can be reduced by forming the second member by press molding.

[Claim b] In the electromagnetic valve according to claim 1 or a,
The solenoid valve, wherein the second member is press-fitted into the first member, and has an outer diameter on the second passage hole side of the first member smaller than an outer diameter on the press-fitting portion side with the first member. .

  According to this invention, the space of the liquid path on the outer periphery of the second member can be secured widely.

[Claim] The electromagnetic valve according to any one of claims 1 and a and b, wherein the first member is formed by press molding.

  According to this invention, it is possible to reduce the cost by forming the first member by press molding.

[Claim d] In the solenoid valve according to any one of claims 1 and a to c,
The first member includes a first peripheral wall press-fitted into an inner periphery of the cylindrical member and a second peripheral wall in which the through hole is formed, and has a step on both the outer periphery and the inner periphery. solenoid valve.

  According to this invention, by providing a step between the first peripheral wall and the second peripheral wall, the rigidity is improved by work hardening, and the distortion of the first peripheral wall when the through hole is formed can be suppressed.

[Claim e] In the electromagnetic valve according to any one of claims 1 and a to d,
The electromagnetic valve, wherein the second member is press-fitted into the first member.

[Claim f] In the solenoid valve according to claim e,
In the first member, the inner diameter of the third peripheral wall into which the second member is press-fitted is smaller than the inner diameter of the first peripheral wall.

  According to this invention, the load at the time of the second member press-fitting can be suppressed by forming the inner diameter of the third peripheral wall for press-fitting the second member smaller than the inner diameter of the first peripheral wall. Moreover, productivity can be improved by distributing and specifically arranging members that require accuracy.

[Claim g] In the solenoid valve according to claim e or f,
The electromagnetic valve according to claim 1, wherein the first member has a step on both the outer periphery and the inner periphery between the third peripheral wall and a fourth peripheral wall press-fitted into the housing of the hydraulic device.

According to the present invention, when the third peripheral wall and the fourth peripheral wall are formed on the same surface, a force to push outward is applied by the second member press-fitting, and the press-fitting load to the housing However, the first member is work hardened by forming the third peripheral wall press-fitting the second member and the fourth peripheral wall press-fitting into the housing into a step shape, Since the fourth peripheral wall of the first member is not expanded outward by the press-fitting of the second member, it is possible to suppress the press-fitting load from being a problem.

[Claim h] In the solenoid valve according to any one of claims 1 and a to g,
An electromagnetic valve, wherein an orifice is provided between the second passage hole and the first passage hole.

  According to the present invention, the manufacturing cost can be reduced by eliminating the orifice of the first member or the second member.

[Claim i] In the solenoid valve according to any one of claims 1 and a to h,
The movable member is a solenoid valve characterized in that a recess having an axial center as a center is formed on an end face on the second member side, and the valve element is disposed at the bottom of the recess.

  According to this invention, the shake of the movable member can be further suppressed by shortening the axial length while securing the sliding portion length of the movable member.

[Claim j] In the electromagnetic valve according to any one of claims 1 and a to i,
The electromagnetic valve according to claim 1, wherein the first passage hole is an orifice.

  According to the present invention, by forming the orifice in the bottom portion, it is possible to form the orifice more easily than the formation of the orifice in each peripheral wall, and the productivity can be improved.

[Claim k] In the solenoid valve according to claim 2,
The electromagnetic valve, wherein the first member is attached to the housing by press-fitting.

  According to this invention, since the first member is directly press-fitted into the housing, it can be sealed without an O-ring.

DESCRIPTION OF SYMBOLS 1 ... Brake hydraulic device 3 ... Master cylinder 4 ... Wheel cylinder 5 ... Main passage (oil passage)
6 ... Pressure increasing valve 7 ... Pressure reducing valve 14 ... Housing 16 ... Pressure reducing passage (oil passage)
17 ... Solenoid 18 ... Cylindrical member 19 ... Fixed iron core 20 ... Plunger (movable member)
DESCRIPTION OF SYMBOLS 21 ... Valve body 22 ... Sheet member 23 ... 1st member 23a ... 1st opening part (one-end opening part)
23b ... Bottom (bottom wall)
24 ... 2nd member 25 ... 1st surrounding wall 26 ... 2nd surrounding wall 27 ... 3rd surrounding wall 28 ... 4th surrounding wall 29 ... Large diameter passage hole (through-hole)
DESCRIPTION OF SYMBOLS 30 ... 1st passage hole 31 ... Large diameter part 32 ... Small diameter part 33 ... Valve seat part 34 ... 2nd passage hole 40 ... Orifice member

Claims (4)

A solenoid that generates electromagnetic force when energized;
One end of which is disposed on the inner periphery of the solenoid, and the cylindrical member of non-magnetic material and the other end side is enlarged via a step portion,
A movable member made of a magnetic material, slidably guided on the inner peripheral surface of the cylindrical member, moved in the axial direction by the attraction force of the solenoid, and provided with a valve body on the distal end side;
Have a first opening formed at one end and the other end side is formed into a bottomed cylindrical shape reduced in diameter via a step portion, the first opening side is fitted into the inner periphery of the tubular member And at least one through hole formed in the axial direction in contact with the step portion of the tubular member, and formed in the peripheral wall along the radial direction, and formed through the bottom wall along the axial direction. A first member having a first passage hole;
It is formed in a covered cylindrical shape having a second opening portion opened at one end, the second opening portion side is fitted into the inner peripheral side of the first member, and an axis with respect to the step portion of the first member A second passage hole that is liquid-tightly fixed to the first opening from the axial direction by being abutted in the direction, and is formed in the lid wall and communicates with the first passage hole from the axial direction; A valve seat portion formed at the outer edge of the two passage holes, and the valve body opens and closes the second passage hole by being separated from and seated on the valve seat portion via the movable member. Two members,
The electromagnetic valve according to claim 1, wherein the valve seat portion is disposed closer to the cylindrical member than the through hole. A housing in which a first oil passage connected to the wheel cylinder and a second oil passage connected to the reservoir tank are formed;
A solenoid valve attached to the housing and opening / closing the oil passage according to an operating state of a brake;
In a brake device comprising:
The solenoid valve is a solenoid that generates an electromagnetic force when energized;
One end of which is disposed on the inner periphery of the solenoid, and the cylindrical member of non-magnetic material and the other end side is enlarged via a step portion,
A movable member made of a magnetic material, slidably guided on the inner peripheral surface of the cylindrical member, moved in the axial direction by suction of the solenoid, and provided with a valve body on the distal end side;
Have a first opening formed at one end and the other end side is formed into a bottomed cylindrical shape reduced in diameter via a step portion, the first opening side is fitted into the inner periphery of the tubular member And a through hole that is disposed in axial contact with the step portion of the cylindrical member, is formed in the peripheral wall along the radial direction, and is connected to the first oil passage, and a bottom wall. A first member having a first passage hole formed through and extending along the axial direction and connected to the second oil passage;
It is formed in a covered cylindrical shape having a second opening portion opened at one end, the second opening portion side is fitted into the inner peripheral side of the first member, and an axis with respect to the step portion of the first member A second passage hole which is liquid-tightly fixed to the first opening side from the axial direction by being disposed in contact with the first direction, and which is formed in the lid wall and communicates with the first passage hole from the axial direction; A valve seat portion formed at the outer edge of the two passage holes, and the valve body opens and closes the second passage hole by being separated from and seated on the valve seat portion via the movable member. Two members,
The brake device according to claim 1, wherein the valve seat portion is disposed closer to the tubular member than the through hole.   A solenoid that generates electromagnetic force when energized;
  A cylindrical member of a non-magnetic material having one end side disposed on the inner periphery of the solenoid and the other end side having a diameter increased via a stepped portion;
  A movable member made of a magnetic material, slidably guided on the inner peripheral surface of the cylindrical member, moved in the axial direction by the attraction force of the solenoid, and provided with a valve body on the distal end side;
  The first opening is formed in a bottomed cylindrical shape having a first opening opened at one end, and the other end is reduced in diameter via a stepped portion, and the first opening is fitted into the inner peripheral side of the tubular member. And at least one through hole fixed to the step portion of the cylindrical member and formed in the peripheral wall along the radial direction, and a first passage hole formed through the bottom wall along the axial direction. A first member;
  It is formed in a covered cylindrical shape having a second opening opened at one end, the second opening side is fitted into the inner peripheral side of the first member, and the first step is inserted into the stepped portion of the first member. A second passage hole which is liquid-tightly fixed from the opening side, is formed in the lid wall and communicates with the first passage hole from the axial direction, and a valve seat portion formed at an outer edge of the second passage hole And the valve body includes a second member that opens and closes the second passage hole by being attached to and detached from the valve seat portion via the movable member,
  The electromagnetic valve according to claim 1, wherein the valve seat portion is disposed closer to the cylindrical member than the through hole.   A housing in which a first oil passage connected to the wheel cylinder and a second oil passage connected to the reservoir tank are formed;
  A solenoid valve attached to the housing and opening / closing the oil passage according to an operating state of a brake;
  In a brake device comprising:
  The solenoid valve is a solenoid that generates an electromagnetic force when energized;
  A cylindrical member of a non-magnetic material having one end side disposed on the inner periphery of the solenoid and the other end side having a diameter increased via a stepped portion;
  A movable member made of a magnetic material, slidably guided on the inner peripheral surface of the cylindrical member, moved in the axial direction by suction of the solenoid, and provided with a valve body on the distal end side;
  The first opening is formed in a bottomed cylindrical shape having a first opening opened at one end, and the other end is reduced in diameter via a stepped portion, and the first opening is fitted into the inner peripheral side of the tubular member. And a through hole fixed to the step portion of the cylindrical member and formed in the peripheral wall along the radial direction and connected to the first oil passage, and formed through the bottom wall along the axial direction. A first member having a first passage hole connected to the second oil passage;
  It is formed in a covered cylindrical shape having a second opening opened at one end, the second opening side is fitted into the inner peripheral side of the first member, and the first step is inserted into the stepped portion of the first member. A second passage hole which is liquid-tightly fixed from the opening side, is formed in the lid wall and communicates with the first passage hole from the axial direction, and a valve seat portion formed at an outer edge of the second passage hole And the valve body includes a second member that opens and closes the second passage hole by being attached to and detached from the valve seat portion via the movable member,
  The brake device according to claim 1, wherein the valve seat portion is disposed closer to the tubular member than the through hole.

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