JP6743461B2 - Solenoid valve device and its pressure adjusting method - Google Patents

Description

The present invention relates to, for example, an electromagnetic valve device capable of appropriately adjusting a spring set load of a valve body and a pressure adjusting method thereof.

A spool valve type solenoid valve using a spool valve is known as a solenoid valve that controls the pressure of fluid according to an electric signal. This solenoid valve changes the hydraulic pressure to be supplied according to the applied electric current, and is used, for example, in a hydraulic circuit of an automatic transmission of a vehicle.

The hydraulic characteristic of this type of solenoid valve has a standard range, and there is no problem if the current-hydraulic characteristic is within the range of the standard, but since the vehicle is developed based on the median of the standard, The closer it is, the better the performance. As a matter of course, since the non-standard function does not function properly, at the worst, the current-hydraulic characteristic must be within the standard.

In this type of solenoid valve, a pressure adjusting plug is provided in order to adjust the hydraulic characteristics within the standard range. The pressure regulator is also generally called an adjuster. The pressure regulating plug is housed, for example, inside a cylindrical nozzle that constitutes an electromagnetic valve together with a spool that serves as a valve body. The outer diameter of the pressure regulating plug is machined to a male thread, and the inner diameter of the nozzle is machined to a female thread. A spring is installed between the pressure regulator and the spool, and the set load of the spring can be adjusted by tightening or loosening the screw of the pressure regulator. After adjusting to the optimum set load position, caulking is performed to crush the threads of the male and female threads in order to prevent the pressure regulating plug from loosening.

When manufacturing a solenoid valve, adjust the tightening degree of the pressure adjusting plug while measuring the pressure at the pressure adjusting point, and then perform caulking when the pressure reaches the median value of the standard. The position of is fixed. However, when the pressure regulating plug is displaced during crimping, the set pressure also deviates from the median value, so the smaller the crimping shift, the better. In addition, since there is variation in the slope of the current-hydraulic characteristics, the smaller the crimping deviation, the better the pressure deviation after crimping may be outside the standard.

Conventionally, by pressing the nozzle from the outside with a conical crimping punch, the nozzle is deformed to the inner diameter side and the pressure regulating plug is fixed. However, there is play in the axial direction between the male screw of the pressure regulating plug and the female screw of the sleeve, and the pressing position of the punch and the position of the screw thread are not constant. There are cases where it is displaced in the axial direction and cases where it is not displaced. Therefore, the axial displacement of the pressure control plug fixed by the caulking process becomes large and small, and the set load of the spring changes accordingly. Variation occurs.

JP 2012-220013 A JP, 9-166238, A

In order to eliminate the above-described variation after caulking, for example, in Patent Document 1, the position is temporarily determined by a rectangular first caulking punch, and then a circular first shape having a smaller shape than the first caulking punch is used. 2 The caulking process is performed with the axial position determined by the caulking punch. However, although the positional deviation in the axial direction can be suppressed to some extent, the position adjustment and the crimping work each have to be performed twice, resulting in an increase in the number of work steps. Further, since the two steps of the first caulking punch and the second caulking punch are performed, the caulking device becomes complicated, and the cycle time becomes long and the productivity decreases.

In Patent Document 2, a through hole is provided in the nozzle in advance, and a screw pin of the pressure regulating plug is crushed by a caulking pin inserted from the through hole. However, this technique has a drawback in that the through hole needs to be provided in the nozzle in advance and the processing man-hour is required. Also, when the tip of the caulking pin hits the slope of the screw thread, the caulking pin pushes the pressure regulating plug in the axial direction to change its position, and the adjusted spring pressure may deviate slightly. ..

Such variations in positioning due to the crimping process occur not only in the spool valve type solenoid valve, but also in other solenoid valves and all solenoid valve devices that position the pressure regulating plug while applying a spring load.

It is an object of the present invention to provide a solenoid valve device and a pressure adjusting method for the solenoid valve device, in which workability in swaging and positioning accuracy of a pressure adjusting plug are improved.

One form of the solenoid valve device of the present invention is characterized by having the following configuration.
(1) A solenoid having a pin that moves in the axial direction by exciting a coil.
(2) A cylindrical nozzle disposed adjacent to the pin on one axial side of the solenoid.
(3) A spool valve housed in the nozzle and axially moved by movement of the pin.
(4) A spring that is in contact with one end of the spool valve in the axial direction and presses the spool valve toward the solenoid in the axial direction.
(5) A nozzle screw portion provided on the inner periphery of the nozzle on the tip side in the axial direction.
(6) The spring pressing force on the spool valve can be varied by rotating the spool valve by contacting one end of the spring in the axial direction and having a pressure adjusting screw portion on the outer peripheral surface that is screwed inward in the radial direction of the nozzle screw portion. A pressure regulator to be used.

The nozzle screw portion has the following configuration.
(7) A first bulge portion provided on an inclined surface on the pressing direction side of the spring, of the two inclined surfaces forming the screw thread provided on the nozzle screw portion.
(8) A second bulge portion provided on an inclined surface axially opposite to the slope surface provided with the first bulge portion, of the two slope surfaces forming the screw thread provided on the nozzle screw portion.
(9) The bulge amount of the second bulge portion is larger than the bulge amount of the first bulge portion.

Another mode of the electromagnetic valve device of the present invention is characterized by having the following configuration.
(1) A solenoid having a pin that moves in the axial direction by exciting a coil.
(2) A cylindrical nozzle disposed adjacent to the pin on one axial side of the solenoid.
(3) A spool valve housed in the nozzle and moved in the axial direction by the movement of the pin.
(4) A spring that comes into contact with one end of the spool valve in the axial direction and presses the spool valve toward the solenoid in the axial direction.
(5) A nozzle screw portion provided on the outer periphery of the nozzle on the tip side in the axial direction.
(6) The inner peripheral surface has a pressure adjusting screw portion that is in contact with one end of the spring in the axial direction and that is screwed to the outside of the nozzle screw portion in the radial direction, and is rotated to prevent the spring from being applied to the spool valve. Pressure regulator with variable pressing force.

The pressure adjusting screw portion has the following configuration.
(7) A first bulge portion provided on an inclined surface on the pressing direction side of the spring, of the two inclined surfaces forming the screw thread provided on the pressure adjusting screw portion.
(8) Of the two slopes forming the screw thread provided on the pressure adjusting screw part, the second bulge part provided on the slope face opposite to the slope face provided with the first bulge part in the axial direction. ..
(9) The bulge amount of the first bulge portion is larger than the bulge amount of the second bulge portion.

The pressure regulating method of the present invention is characterized by including the following steps.
Contacting the rotating jig (1) tone 圧栓, wherein the Rukoto rotation jig is rotated by rotating the adjustment圧栓, by adjusting the spacing of said timing圧栓and said spool valve, the spring The first step to determine the set load.
(2) the rear first step, a second step of fixing said rotation jig using said jig in the state where the rotation jig and said tone圧栓are in contact.
(3) After the second step, the nozzle screw portion or a part of the outer peripheral surface of the pressure regulating plug is plastically deformed from the outside in the radial direction of the pressure regulating plug, and the nozzle screw portion and the screw of the pressure regulating plug are screwed. A third step of fixing the movement of the pressure regulating plug by plastically deforming the screwed portion with the portion.

According to the present invention, the rotating jig is rotated by bringing the rotating jig into contact with the pressure adjusting plug, the distance between the pressure adjusting plug and the spool valve is adjusted, and the rotating jig is set in a state in which the set load of the spring is determined. For fixing , the pressure regulating plug is pressed on the side opposite to the pressing direction of the spring. As a result, there is no displacement between the pressure regulating plug and the nozzle screw portion, and the pressure applied to the spool valve by the spring pressed by the pressure regulating plug can be set accurately.

FIG. 1 is a vertical sectional view of the first embodiment. FIG. 2 is an enlarged cross-sectional view of the nozzle screw portion of the first embodiment. FIG. 3 is an enlarged cross-sectional view showing the method of manufacturing the nozzle screw portion of the first embodiment. FIG. 4 is a cross-sectional view showing an example of a jig used in the manufacturing method of FIG. FIG. 5 is a perspective view of the jig shown in FIG. FIG. 6 is a graph showing the effect of the first embodiment. FIG. 7 is a vertical sectional view of the second embodiment. FIG. 8 is an enlarged cross-sectional view of the nozzle screw portion of the second embodiment. FIG. 9 is an enlarged cross-sectional view of a nozzle screw portion showing a problem of the conventional technique.

[1. First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the present embodiment, the axis means the central axis along the longitudinal direction of the nozzle that incorporates the spool valve, and when simply referred to as the circumferential direction or the axial direction, it indicates the circumferential direction of the central axis or the axial direction of the central axis. .. The one end in the axial direction is one end in the axial direction of each member, and in the present embodiment, the end on the right side in the drawing is shown, and the other end in the axial direction is the end on the opposite side in the axial direction of each member. Yes, in the present embodiment, the end portion on the left side in the drawing is shown.

[1.1 Overall configuration]
FIG. 1 is a vertical sectional view of the solenoid valve of this embodiment. The solenoid valve according to the present embodiment includes a drive unit 10 and a nozzle unit 20 provided at one axial end of the drive unit 10.

The drive unit 10 includes a coil 12 fixed inside a tubular housing 11, a resin layer 13 that covers the coil 12, and a tubular stator core 14 provided on the inner circumference of the coil 12. A plunger 15 that is attracted by the coil 12 and moves in the stator core 14 is inserted in the center of the stator core 14, and a pin 16 that moves together with the plunger 15 is inserted in the nozzle 20 side of the plunger 15. A pin guide core 14 a is provided on the outer periphery of the pin 16 in the housing 11.

The nozzle portion 20 has a cylindrical nozzle 21 and a spool valve 22 that is axially slidably inserted therein. The nozzle 21 is provided with a plurality of ports 21a, 21b, 21c so as to penetrate the wall surface thereof. The spool valve 22 is provided with valve portions 22a, 22b, 22c for opening and closing the ports 21a, 21b, 21c. The end of the spool valve 22 on the drive unit 10 side is abutted with the end of the pin 16 on the opposite side of the plunger 15. A recess 23 is provided at an end of the spool valve 22 opposite to the drive unit 10, and one end of a spring 24 is inserted into the recess 23.

A pressure regulating plug 25 is screwed into the end of the nozzle 21 opposite to the drive unit 10. That is, the female screw 26 is formed on the inner periphery of the end of the nozzle 21, the male screw 27 is formed on the outer periphery of the pressure regulating plug 25, and the male screw 27 is screwed onto the inner periphery of the female screw 26 to adjust the end of the nozzle 21. A pressure plug 25 is attached. The female screw 26 provided on the nozzle 21 corresponds to the nozzle screw portion in the invention of claim 1.

A recess 28 is provided on the end surface of the pressure regulating plug 25 on the drive unit 10 side, and the other end of the spring 24 is inserted into the recess 28. A groove 29 is provided on the outer end surface of the pressure adjusting plug 25, that is, the end surface opposite to the spring 24, and the tip of the jig is inserted into the groove 29 to rotate the pressure adjusting plug 25. Adjust the tightening amount.

[1.2 Configuration of pressure regulator]
At the position corresponding to the pressure regulating plug 25 on the outer circumference of the nozzle 21, two caulking portions 30a and 30b that are pressed from the outer circumference of the nozzle 21 toward the central axis thereof are provided. The caulking portions 30 a and 30 b are formed by driving the caulking punch P from the outer circumference of the pressure regulating plug 25.

As shown in the enlarged cross-sectional view of FIG. 2, of the two slopes forming the screw thread of the female screw 26 of the nozzle 21 corresponding to the caulking portions 30a and 30b, the slope on the pressing direction side of the spring 24 is first 1 bulge A is provided. Further, of the two slopes forming the thread of the female screw 26, the second bulge B is provided on the slope opposite to the slope where the first bulge A is provided in the axial direction. The amount of bulging from the sloped surface of the second bulge portion B is larger than the amount of bulge of the first bulge portion A.

[1.3 jig]
In the solenoid valve device of the first embodiment having the above-described configuration, in order to make the bulging amount from the sloped surface of the second bulging portion B larger than the bulging amount of the first bulging portion A, For example, a jig as shown in FIGS. 3 to 5 is used.

This jig includes a holding portion 50 of the solenoid valve device and holding portions 51a and 51b of the two caulking punches P. The holding portions 50, 51a, 51b are both block-shaped, and the holding portions 51a, 51b of the punch P are fixed to both sides of the holding portion 50 of the solenoid valve device. The one punch holding portion 51a is fixed to the holding portion 50 of the solenoid valve device with the hydraulic pressure supply portion 52 and the packing 53 interposed therebetween.

The holding portion 50 of the solenoid valve device is provided with a mounting hole 54 having a circular cross section that penetrates through the holding portion 50 so as to be orthogonal to the stacking direction of the holding portions 50, 51a, 51b. One opening of the mounting hole 54 is for fitting the nozzle portion 20 of the solenoid valve device, and the female screw 26 of the nozzle portion 20 reaches near the center of the holding portion 50. An oil passage 50a is bored inside the holding portion 50, and one end of the oil passage 50a is opened to a fitting portion of the mounting hole 54 into which the solenoid valve device is fitted. The other end of the oil passage 50a of the holding portion 50 communicates with the oil passage 52a provided in the hydraulic pressure supply portion 52, whereby the hydraulic pressure from the hydraulic pressure supply portion 52 causes the oil passage 52a of the hydraulic pressure supply portion 52, The oil pressure similar to that when the solenoid valve device is used is supplied to the spool valve 22 via the oil passage 50a of the holding portion 50 and the ports 21a, 21b and 21c fitted in the mounting hole 54.

A pair of punch insertion holes 56a and 56b are provided in the holding portion 50 at positions facing the female screw 26 of the nozzle portion 20. The punch insertion holes 56a and 56b penetrate from the outer surface of the holding portion 50 to the inner surface of the mounting hole 54. The tips of the punches P held by the holding portions 51a, 51b are inserted into the punch insertion holes 56a, 56b so that they can come into contact with and separate from the outer peripheral surface of the nozzle portion 20. The hydraulic pressure supply part 52 is provided with a punch insertion hole 56c corresponding to the punch insertion hole 56a of the holding part 50, and the punch P held by the holding part 51a penetrates through the punch insertion hole 56c, and the holding part is held. It has reached 50.

The hydraulic pressure supply unit 52 and the holding unit 50 of the solenoid valve device are fixed in close contact with each other, and the packing 53 provided therebetween connects the oil passages 52a and 50a of the both in an oil-tight manner. The punch holding portions 51a and 51b arranged on both sides of the holding portion 50 are provided so as to be able to come into contact with and separate from the holding portion 50. Two pin-shaped guides 57 are provided on both surfaces of the holding portion 50, and the punch holding portions 51a and 51b move along the guides 57.

The rotary jig 60 of the pressure regulating plug 25 is inserted into the opening of the mounting hole 54 on the side opposite to the solenoid valve device. The rotary jig 60 is a columnar member as a whole, and the tip end side portion is inserted into the mounting hole 54, and the base end side protrudes from the holding portion 50. The bearing portion 58 is fixed to the opening of the mounting hole 54 on the rotating jig 60 side. The bearing portion 58 is fixed to the holding portion 50 by means such as screwing. The protruding portion of the rotating jig 60 from the holding portion 50 is fitted into the bearing portion 58 in a rotatable and slidable manner.

The bearing portion 58 is provided with a stopper 59 that prevents the rotation jig 60 from moving. FIG. 4 is an example of the stopper 59. In the stopper 59 of FIG. 4, a screw hole is bored in the bearing portion 58 at a right angle to the axial direction of the rotating jig 60, and the tip of a set screw 59a screwed into the screw hole is pressed against the peripheral surface of the rotating jig 60. It is a thing. A handle 59b for tightening or loosening the set screw 58a is fixed to a portion of the set screw 59a exposed from the bearing portion 58.

A ridge 61 that engages with the groove 29 provided in the pressure regulating plug 25 is provided at the tip of the rotating jig 60. A spring 62 is arranged between the tip of the rotating jig 60 and the bearing portion 56. The spring 62 has a larger elastic force than the spring 24 provided in the solenoid valve device. A handle 63 for rotating the rotating jig 60 is provided at the base end of the rotating jig 60.

[1.4 Pressure adjustment method]
The pressure adjusting method of the solenoid valve device of the present embodiment is performed as follows using the jig.

[1.4.1 First step]
As shown in FIG. 3, the nozzle portion 20 of the solenoid valve device is inserted into the mounting hole 58 of the jig, and the pressure regulating plug 25 at the tip thereof is abutted against the tip of the rotary jig 60, and is provided on the pressure regulating plug 25. The protrusion 61 of the rotary jig 60 is fitted into the groove 29. At this time, the pressure adjusting plug 25 is pressed toward the rotating jig 60 by the spring 24 arranged in the nozzle 21, but the elastic force of the spring 62 provided between the rotating jig 60 and the bearing portion 58 is reduced. Since it is larger, the pressure regulating plug 25 is urged toward the other end side in the axial direction.

When the nozzle portion 20 is inserted to the position of the mounting hole 58 shown in FIG. 3, the ports 21a, 21b, 21c provided in the nozzle 21 and the oil passage 50a opening in the mounting hole 58 are connected. In this state, hydraulic oil is supplied to the spool valve 22 of the solenoid valve device by supplying hydraulic oil from the oil passage 52a of the hydraulic pressure supply unit 52.

When the handle 63 of the rotary jig 60 is rotated and the pressure regulating plug 25 is rotated while the hydraulic pressure is being applied to the spool valve 22, the pressure regulating plug 25 is inserted into the groove 29. It rotates together with the rotating jig 60. In this case, since the elasticity of the spring 62 of the rotating jig 60 is strong, the slope of the male screw 27 on the spool valve 22 side and the slope of the female screw 26 on the rotating jig 60 side are large as shown in the enlarged view of FIG. The pressure control plug 25 moves to the other end side in the axial direction while rotating in the nozzle 21 while closely contacting each other.

By moving the pressure adjusting plug 25 in the axial direction of the nozzle 21 by the rotating jig 60, the distance between the pressure adjusting plug 25 and the nozzle 21 is adjusted, and the repulsive force of the spring 24 compressed between the pressure adjusting plug 25 and the nozzle 21 is increased or decreased. Determine the set load of the spring applied to 21. That is, the oil pressure is applied from the oil passage of the oil pressure supply unit 52 to the ports 21a, 21b, 21c of the nozzle 21, and the rotating jig 60 is rotated while the handle 63 is rotated so that the output becomes a predetermined value, and the spring 24 of the spool valve 22 is rotated. Determine the set load of.

[1.4.2 Second step]
In the second step, the axial movement of the pressure regulating plug 25 is temporarily fixed while the set load is determined in the first step. That is, when the set load is determined, the handle 59b of the stopper 59 provided on the bearing portion 58 is used to rotate the set screw 59a, so that the rotating jig 60 is pressed by the tip of the set screw 59a. Then, the rotating jig 60 cannot move in the rotation direction and the axial direction with respect to the bearing portion 58, and the pressure adjusting plug 25 pressed by the rotating jig 60 is also attached to the male screw 27 on the spool valve 22 side. The slant surface and the slant surface of the female screw 26 on the side of the rotating jig 60 are temporarily fixed so as not to move in the axial direction while being in close contact with each other.

[1.4.3 Third step]
In the third step, in a state where the pressure regulating plug 25 is temporarily fixed, a part of the outer peripheral surface of the nozzle 21 is plastically deformed from the radial outside of the pressure regulating plug 25, and the female screw 26 and the male screw 27 are screwed together. The portion is plastically deformed to fix the movement of the pressure regulating plug 25. That is, the punch holding parts 51a and 51b arranged on both sides of the holding part 50 and the hydraulic pressure supply part 52 are moved along the guide 57, and two punches P are provided from the opposite side of the nozzle 21 in the radial direction 180 degrees. The threads of the female screw 26 are plastically deformed by simultaneously caulking the female screw 26 portion at the tip of the nozzle 21 toward the inner side in the radial direction.

Normally, when such a plastic deformation process is performed, if there is a gap between the female screw 26 and the male screw 27 as shown in FIG. 9( a ), the pressure regulating plug 25 will have a gap as shown in FIG. 9( b ). Then, it moves to the one end side in the axial direction with a gap. However, in the present embodiment, since the pressure regulating plug 25 is temporarily fixed by the jig, the movement toward the one end side in the axial direction is restricted, and the caulking is performed at almost the same position.

As a result of this caulking process, as shown in FIG. 2, of the two slopes of the female screw 26 provided in the nozzle 25, the first bulge portion A is formed on the slope of the pressing direction side of the spring 24, and the first bulge portion is formed. A second bulge B is formed on the slope opposite to the axial direction where the slope A is provided. In this case, of the two slopes, the slope close to the screw thread is hardly deformed, and the slope with the gap is largely deformed. 1 is larger than the bulge amount A of the bulge portion.

After fixing the pressure regulating plug 25 to the female screw 26 of the nozzle 21 in this way, the hydraulic pressure supplied to the solenoid valve device is released, the solenoid valve device is removed from the jig, and the pressure regulating work is completed. ..

[1.5 Effect]
According to this embodiment, the following effects are exhibited.

(1) In the present embodiment, the pressure adjusting plug 25 is screwed into the nozzle 21 while pressing the male screw 27 against the female screw 26, the set load is adjusted, and the pressure adjusting plug 25 is cured while the adjustment is completed. Temporarily fix with tools. Therefore, when the caulking process is performed by the punch P, the pressure regulating plug 25 does not move in the axial direction by the pressure of the punch P, and the pressure regulating plug 25 is stopped at the position where the set load is determined. , Can be securely fixed to the nozzle 21.

(2) Of the two slopes forming the female screw 26 provided on the nozzle 21, the second bulge B provided on the slope of the pressure regulating plug 25 on the side away from the male screw 27 is in close contact with the male screw 27. Since it is larger than the bulging amount of the first bulging portion A provided on the inclined surface on the side where the pressure adjustment plug 25 is tightened, the positional relationship between the female screw 26 and the male screw 27, which are in close contact with each other when the pressure regulating plug 25 is tightened, is maintained as is. The pressure plug 25 can be fixed to the nozzle 21. As a result, even if the caulking work is performed after the adjustment of the set load, there is no displacement of the pressure regulating plug 25, and the variation of the set load once adjusted is eliminated.

In this regard, FIG. 6 shows data obtained by actually measuring how much the hydraulic pressure value before and after the crimping process changes between the present embodiment and the conventional technique in which the jig is not temporarily fixed. According to the present embodiment, it can be seen that the amount of variation and the variation in the hydraulic pressure value before and after caulking are smaller than those in the conventional technique.

(3) In the present embodiment, since the punch P is performed simultaneously from both sides in the radial direction, the pressure regulating plug 25 can be fixed more reliably, and the pressure regulating plug 25 is not displaced. Will be improved.

(4) The step of specifying the axial position of the pressure regulating plug 25 for adjusting the set load of the spring 24 and the step of performing the caulking process of the pressure regulating plug 25 can be performed by one jig. Therefore, workability is improved.

[2. Second Embodiment]
The second embodiment will be described with reference to FIGS. 7 and 8. In the second embodiment, a cup-shaped pressure regulating plug 25 is fixed to the end of the nozzle 21 on the one axial end side so as to cover it.

In the second embodiment, a male screw 27 is provided on the outer circumference of the end portion of the nozzle 21 on the side opposite to the drive portion 10. The pressure regulating plug 25 has a cylindrical shape with a bottom, and an internal thread 26 is provided on the inner periphery thereof. The female screw 26 corresponds to the pressure adjusting screw portion provided on the pressure adjusting plug 25 in the invention of claim 2. The pressure regulating plug 25 is fitted so as to cover the end portion of the nozzle 21, and its female screw 26 and the male screw 27 of the nozzle 21 are screwed together.

One end of the spring 24 in the axial direction abuts on the inner surface of the pressure regulating plug 25, and the other end of the spring 24 in the axial direction is fitted into a convex portion 28 a provided on the end portion of the spool valve 22. By tightening the pressure regulating plug 25 to the nozzle, the pressing force on the spring 24 changes, and the load of the spring is adjusted. The plurality of caulking portions 30a and 30b are formed by driving the caulking punch P having a plurality of pressing portions from the outer circumference of the pressure regulating plug 25. The interval between the caulking portions 30a and 30b and other configurations are the same as in the first embodiment.

As shown in the enlarged cross-sectional view of FIG. 8, of the two slopes forming the thread of the female screw 26 of the pressure regulating plug 25, corresponding to the caulking portions 30a and 30b, the slope on the pressing direction side of the spring 24. Is provided with a first bulge portion A. Further, of the two slopes forming the thread of the female screw 26, the second bulge B is provided on the slope opposite to the slope where the first bulge A is provided in the axial direction. The amount of bulging from the sloped surface of the first bulge portion A is larger than the amount of bulge of the second bulge portion B.

Therefore, also in the second embodiment, the pressure regulating plug 25 can be fixed to the nozzle 21 while maintaining the positional relationship between the female screw 26 and the male screw 27 that are in close contact with each other when the pressure regulating plug 25 is tightened. As a result, even if the caulking work is performed after the adjustment of the set load, there is no displacement of the pressure regulating plug 25, and the variation of the set load once adjusted is eliminated. In addition, also in the second embodiment, it is possible to obtain the same effects as those of the first embodiment.

[3. Other Embodiments]
The present invention is not limited to the above embodiments. The above embodiment is presented as an example, and can be implemented in various other forms. Various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope of the invention, the gist, and the scope of equivalents thereof. Hereinafter, an example thereof will be shown.

(1) In the illustrated embodiment, the present invention is applied as a solenoid valve device of a solenoid spool valve, but the present invention is not limited to this type of solenoid valve, and is also used for other types of solenoid valves. It is possible. Further, the invention is not limited to the solenoid valve, and can be applied to all devices that need to be fixed so that the adjustment amount does not shift after the spring load is adjusted.

(2) The jig for temporarily fixing the pressure regulating plug 25 after determining the set load is not limited to the one shown in the drawing. A configuration may be adopted in which the movement of the rotating jig 60 is blocked in the axial direction.

(3) The crimping portion may be provided at one place or at three or more places, but the pressure adjusting plug 25 can be more reliably fixed at a plurality of places. When plastically deformed from a plurality of directions, the pressure regulating plug 25 does not tilt with respect to the central axis, and the nozzle 21 and the pressure regulating plug 25 can be accurately positioned all around. It is preferable that the plurality of caulking portions be formed simultaneously by a jig such as a caulking punch, but the caulking portions may be formed one by one.

(4) As the spring 24, a U-shaped spring, a torsion spring, or a bamboo spring may be used in addition to the illustrated coil spring. In addition to metal, a resin spring or a spring made of a block-shaped elastic body can be used.

A... 1st bulge part, B... 2nd bulge part, P... Caulking punch, 10... Drive part, 11... Housing, 12... Coil, 13... Resin layer, 14... Core, 14a... Pin guide core, 15... Plunger, 16... Pin, 20... Nozzle part, 21... Nozzle, 21a, 21b, 21c... Port, 22... Spool valve, 22a, 22b, 22c... Valve part, 23... Recess, 24... Spring, 25... Adjustment Pressure plug, 26... Female screw, 27... Male screw, 28... Recessed portion, 29... Groove, 30a, 30b... Crimping portion, 50... Solenoid valve device holding portion, 51a, 51b... Punch holding portion, 52... Hydraulic pressure supply portion, 53... packing, 54... mounting hole, 56a, 56b... punch insertion hole, 57... guide, 58... bearing part, 59... stopper, 60... rotating jig, 61... ridge, 62... spring, 63... handle.

Claims (3)

A solenoid having a pin that moves in the axial direction by exciting the coil,
A cylindrical nozzle disposed adjacent to the pin on one axial side of the solenoid,
A spool valve housed in the nozzle and moved in the axial direction by the movement of the pin;
A spring that abuts on one end side in the axial direction of the spool valve and presses the spool valve toward the solenoid side in the axial direction;
Nozzle screw portion provided on the tip side in the axial direction of the nozzle,
A pressure adjusting plug that includes a screw portion that is screwed into the nozzle screw portion, is in contact with an end portion of the spring in the axial direction on one end side, and rotates to change the spring pressing force to the spool valve;
A method for pressurizing jig thus regulating the set load of the spring which holds the solenoid valve device provided with,
Contacting the rotating jig to the tone 圧栓, the rotary jig rotates the adjustment圧栓 by Rukoto rotate, by adjusting the spacing of said timing圧栓and said spool valve, the set load of the spring The first step of determining
After the first step, a second step of fixing the rotating jig using the jig in a state where the rotating jig and the pressure regulating plug are in contact with each other,
After the second step, the nozzle screw portion or a part of the outer peripheral surface of the pressure regulating plug is plastically deformed from the outer side in the radial direction of the pressure regulating plug, and the nozzle screw portion and the screw portion of the pressure regulating plug are formed. A third step of plastically deforming the screwed portion to fix the movement of the pressure regulating plug;
And method for adjusting pressure in a solenoid valve device. In the second step, and said timing圧栓, in a state where said rotating jig is in contact, the rotating jig and the tone圧栓by fixing the rotational jig by using said jig The pressure regulating method for a solenoid valve device according to claim 1, wherein movement in the axial direction is prevented. In the third step, at a plurality of locations on the nozzle screw portion or the peripheral surface of the pressure regulating plug, plastically deformed portions that are plastically deformed from the radially outer side to the radially inner side of the pressure regulating plug are formed, and 3. The pressure regulating method for a solenoid valve device according to claim 1, wherein the plastically deformed portion is formed at the same time on the radially opposite side of the nozzle screw portion or the peripheral surface of the pressure regulating plug.

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