JPH04127480U - Solenoid for solenoid valve - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to join the guide member and spring bearing member and the guide member and the fixed magnetic pole without generating thermal distortion, significantly increasing the work efficiency of joining each member and reducing the manufacturing cost of the solenoid. To provide a solenoid for a solenoid valve that can reduce the [Structure] Joint part 20 between guide member 4 and fixed magnetic pole 10 where movable iron core 5 is arranged, and guide member 13 and movable iron core 5
The joint portion 30 with the spring receiving member 13 that receives the spring member 7 that urges the spring member 7 is joined by brazing.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a solenoid for a solenoid valve, and in particular to the connection between the components that make up the solenoid. A solenoid for solenoid valves that can improve work efficiency in joint work and reduce solenoid production costs. Regarding de.

0002

[Prior art]

Conventionally, various electromagnetic valves such as electromagnetic on-off valves and electromagnetic directional control valves equipped with solenoids have been used. Valves are used in industrial machinery such as construction machinery and agricultural machinery, or hydraulic systems such as automobiles and aircraft. Widely used. As shown in FIG. 4, the conventional electromagnetic valve solenoid 100 has a cylinder made of magnetic material. a shaped case 101, and a cylindrical solenoid disposed on the inner outer periphery of the case 101. a cylindrical member made of a non-magnetic material disposed inside the solenoid member 102; A guide member 103, a movable iron core 104 disposed within the guide member 103, and a movable A spring member 105 that biases the iron core 104 and a guide provided on the left end side of the case 101. The fixed magnetic pole 106 is bonded and fixed to the left end of the door member 103 and the right end of the case 101. A spring receiving part made of a magnetic material is disposed on the side and is bonded and fixed to the right end part of the guide member 103. When assembling the solenoid 100, the guide member 103 is first assembled. After joining the joint part 110 between and the spring receiving member 107 by welding, the O-ring 108 Attach the adjustment screw 109, the spring member 105, and the movable iron core 104, and then The fixed magnetic pole 106 is disposed in engagement with the guide member 103, and then the guide member 10 3 and the fixed magnetic pole 106 were joined by welding.

0003

[Problem that the idea aims to solve]

In the conventional electromagnetic valve solenoid, the guide member and the spring bearing member are connected to each other. The parts and the joints between the guide member and the fixed magnetic pole are joined by welding, so each part There is a problem in that thermal strain tends to occur at the joints where the walls of the materials are relatively thin. In particular, At the joint between the inner diameter member and the spring receiving member, the inner diameter of these members is distorted due to thermal strain. It is easy to see, and since a bead is generated on the inner surface of the joint, the guide member and spring are removed after welding. Finishing must be performed on the inner circumferential surface of the receiving member, which may significantly reduce work efficiency. There is a problem in that the manufacturing cost of the solenoid increases. In addition, the guide member and When welding the fixed magnetic pole, the heat conducted to the spring receiver will cause it to attach to the adjustment screw. O-rings are easily deteriorated by heat, so O-rings made of heat-resistant materials should not be used. Therefore, there is a problem that the cost of the O-ring becomes high.

0004 The purpose of this invention is to connect the guide member, spring receiver member, and guide without causing thermal distortion. It is possible to join components and fixed magnetic poles, significantly increasing the work efficiency of joining each component. To provide a solenoid for a solenoid valve that can reduce the manufacturing cost of the solenoid. That is.

[0005]

[Means to solve the problem]

The electromagnetic valve solenoid according to the present invention includes a cylindrical case made of a magnetic material and a cylindrical case made of a magnetic material. A cylindrical solenoid member disposed on the inner outer periphery and a cylindrical solenoid member disposed inside the solenoid member. A cylindrical guide member made of non-magnetic material and a movable iron core arranged inside the guide member. , a spring member that biases the movable core, and a guide member disposed at one end of the case. A fixed magnetic pole bonded and fixed to the end, and the other end of the guide member arranged at the other end of the case. A solenoid for a solenoid valve equipped with a spring bearing member made of magnetic material bonded and fixed to the and a joint between the fixed magnetic pole and the guide member and a joint between the guide member and the spring bearing member. The parts are joined by brazing.

[0006]

[Effect]

In the electromagnetic valve solenoid according to the present invention, the fixed magnetic pole and the guide member are connected to each other. The joint between the guide member and the spring receiver member is joined by brazing. , there is no thermal distortion in each member, especially in the guide member and spring receiver member. Distortion of the inner diameter due to thermal distortion and contact when welding the guide member and spring receiver member. This eliminates the problem of beads forming on the inner surface of the joint, making it easier to finish these parts after joining. Machining can be omitted, and the efficiency of joining work is significantly increased, making it easier to manufacture solenoids. Cost can be reduced. In addition, the connection between the spring receiving member and the guide member and It is possible to join the fixed magnetic pole and the guide member at the same time, reducing the joining work. Work efficiency can be further increased. Also, when using an O-ring, make sure that it is heat resistant. O-ring costs can be reduced because regular ones can be used instead of ones made of materials. can be reduced.

[0007]

[Effect of the idea]

According to the solenoid for a solenoid valve according to the present invention, as explained in the function section above, the solenoid is fixed. The joint between the constant magnetic pole and the guide member and the joint between the guide member and the spring bearing member are brazed. Since the joints are made by screwing, the problem of thermal distortion of each member can be solved, and the guide member and bar It is possible to omit finishing machining of the support parts, and the efficiency of joining work is significantly improved. The manufacturing cost of the guide can be reduced, and the connection between the spring receiving member and the guide member can be reduced. Since it is possible to simultaneously connect the fixed magnetic pole and the guide member, it is possible to When using O-rings, the work efficiency can be further improved. The cost of O-rings is reduced because regular ones can be used instead of ones made of heat-resistant materials. Effects such as being able to reduce costs can be obtained.

[0008]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a solenoid S provided in an electromagnetic directional control valve. It is. As shown in Fig. 1, a cylindrical case 1 made of a magnetic material has a cylindrical A solenoid member 3 wound around the bobbin 2 is attached, and a non-magnetic A cylindrical guide member 4 made of material is fitted inside, and a movable iron core is installed inside the guide member 4. 5 is disposed so as to be slidable in the left and right direction, and a rod member 6 is disposed on the left side of the movable iron core 5 in the left and right directions. A spring portion is provided on the right side of the movable core 5 and biases the movable core 5 to the left. A spring accommodating hole 5a for accommodating the material 7 is formed. A fixed magnetic pole 10 is arranged on the left end side of the case 1, and the fixed magnetic pole 10 and the guide member 4 The rod member 6 is connected to the rod member 6 formed on the fixed magnetic pole 10. The spring is inserted through the spring insertion hole 10a and the spring accommodation hole 10b and protrudes toward the left end side of the fixed magnetic pole 10. ing. The valve body V of the electromagnetic directional control valve is attached to the left end of the fixed magnetic pole 10. A threaded portion 10c is formed, and a spacer 11 is provided between the fixed magnetic pole 10 and the movable iron core 5. It is being Note that the reference numeral 12 is an O-ring.

[0009] A spring receiving member 13 made of a magnetic material is disposed on the right end side of the case 1. 3 and the guide member 4 are joined and fixed at the joint 30, and the screw hole 13 of the spring receiving member 13 An adjustment screw 14 for adjusting the spring force of the spring member 7 is screwed onto a. tone A protrusion 14a with which the spring member 7 engages is formed at the left end of the adjustment screw 14. At the right end of the screw 14, there is an operating section 1 with which an operating tool is engaged when adjusting the adjusting screw 14. 4b is formed, and the adjustment screw 14 has a sealer with sealing resin embedded in the thread groove. 15 is screwed on. Note that the inner diameter of the screw hole 13a is larger than the outer diameter of the spring member 7. It is formed with a large diameter.

0010 Between the case 1 and the spring receiving member 13 are two approximately ring-shaped yoke parts made of magnetic material. The material 16 is disposed in contact with the right end of the bobbin 2, and the case is disposed near the right side of the yoke member 16. A rubber bush 17 is disposed between the spring support member 13 and the spring support member 13, and The two lead wires 18 of the solenoid member 3 that supply exciting current to the solenoid member 3 are , are inserted into the case 1 through the protrusion 17a of the bush 17. As shown in FIG. 2, each yoke member 16 has two lead wires 18 connected to the bobbin 2 side. Notches 16a for passage are formed in a fan shape, and a button corresponding to the notch 16a A portion of the left end of the bush 17 on the side of the spring receiving member 13 is provided with a groove that engages with each notch 16a. A protrusion 17b that restricts rotation of the yoke member 16 is integrally formed. The right end of the case 1 has an insertion hole 8 through which the protrusion 17a of the bush 17 is engaged. A side plate member 8 is provided, and the side plate member 8 is attached to the spring receiving member 13. It is fixed to the case 1 by a ring member 9.

[0011] Next, the joint portion 20 between the guide member 4 and the fixed magnetic pole 10, and the joint portion 20 between the guide member 4 and the spring receiver. The joint portion 30 with the member 13 will be explained. As shown in FIG. 3, a step portion 21 is formed in an annular shape on the fixed magnetic pole 10 side of the joint portion 20. When the fixed magnetic pole 10 and the guide member 4 are engaged, the stepped portion 21 and the guide An annular groove 22 for arranging a linear brazing material M is formed at the left end of the do member 4, A groove 23 is formed on the circumferential surface of the fixed magnetic pole 10 that comes into contact with the guide member 4 on the right side of the step 21. It is formed in a ring shape. On the other hand, on the guide member 4 side of the joint portion 30, a step portion 31 and an engaging portion 32 are respectively provided in an annular shape. A stepped portion 33 is formed on the spring receiving member 13 side of the joint portion 30 and is engaged with the engaging portion 32. When the spring receiving member 13 and the guide member 4 are engaged, the stepped portion 31 and the spring are formed. An annular groove 34 is formed with the left end of the receiving member 13 for arranging the linear brazing material M. , the inner circumferential surface of the engaging portion 32, the inner circumferential surface of the spring receiving member 13, and the outer circumferential surface of the right part of the movable iron core 5. A relatively large gap 35 of several hundred microns is formed between the two.

0012 When joining each joining part 20, 30, as shown in FIG. The fixed magnetic pole 10 and the spring bearing member 13 are respectively guided. Engage with the member 4, and place brazing materials M made of copper, for example, in each annular groove 22 and 34, respectively. Then, in this state, the brazing material M is melted in a vacuum furnace and the joints 20 and 30 are brazed. . During brazing, the molten brazing material M is filled into the annular grooves 22 and 34, respectively, and , some of them are the contact surface between the guide member 4 and the fixed magnetic pole 10 of the joint part 20, and It penetrates into the contact surface between the guide member 4 and the spring receiving member 13 of the joint 30, and the joint 20. 30 are firmly joined. In addition, the annular groove 23 formed in the fixed magnetic pole 10 and the movable iron Due to the gap 35 between the core 5 and the spring bearing member 13, the molten brazing material M flows into the joints 20 and 3. It may flow out onto the inner peripheral surface of the guide member 4 other than 0 or the spring receiving member 13, or it may flow onto the movable iron core 5. -It is possible to reliably prevent the material M from flowing down and adhering. After brazing the joints 20 and 30 in this way, the solenoid member 3, the yoke member 16, bush 17, adjustment screw 14, case 1, etc. are assembled. The spring member 7 When assembling the adjustment screw 14, insert it together with the adjustment screw 14 from the screw hole 13a. , after adjusting the spring force of the spring member 7 via the adjustment screw 14, tighten the seal nut 15. It is screwed onto the adjustment screw 14 to seal the adjustment screw 14. Seal nut 1 like this When it is necessary to bleed air between the movable iron core 5 and the spring bearing member 13 by using 5. To do this, loosen the seal nut 15 and remove the adjustment screw 14 from the spring receiver member 13. This makes it easy to bleed air.

[0013] The operation of the solenoid S configured in this way will be explained. Joint portion 20 between guide member 4 and fixed magnetic pole 10 and guide member 4 and spring receiver member 1 Since the joint part 30 with 3 is joined by brazing, each member 4, 10, 13 No thermal strain occurs, especially due to thermal strain of the guide member 4 and the spring bearing member 13. Distortion of the inner diameter is prevented, and the joint portion 3 between the guide member 4 and the spring receiver member 13 is Since the brazing material M is reliably prevented from flowing into the inner surface of 0, the contact between these members 4 and 13 is It is possible to omit finishing processing after joining, greatly increasing the efficiency of joining work. The manufacturing cost of the id S can be reduced. In addition, multiple solenoids S Therefore, it becomes possible to join the respective joint parts 20 and 30 at the same time in the furnace. , it is possible to dramatically improve the work efficiency of joining work. The atmosphere in the furnace during brazing is not limited to vacuum, but inert gas or nitrogen gas may also be used. It is also possible that the brazing material M is a silver brazing material or an alloy brazing material. Ma In addition, the above-mentioned solenoid is not limited to electromagnetic directional control valves, but also electromagnetic on-off valves and electromagnetic pilot valves. Of course, it can be applied to various electromagnetic valves such as.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a solenoid for a solenoid valve.

FIG. 2 is a perspective view of a yoke member and a bush.

FIG. 3 is a partially enlarged sectional view showing a state in which a fixed magnetic pole, a guide member, and a spring receiver member are engaged with each other.

FIG. 4 is a sectional view of a conventional solenoid for a solenoid valve.

[Brief explanation of symbols]

S Solenoid for solenoid valve 1 case 3 Solenoid parts 4 Guide member 5 Movable iron core 7 Spring member 10 Fixed magnetic pole 13 Spring receiving member 20・30 Joint part

Claims (1)

[Scope of utility model registration request] Claim 1: A cylindrical case made of a magnetic material, a cylindrical solenoid member disposed on the inner outer periphery of the case, and a cylindrical guide made of a non-magnetic material disposed inside the solenoid member. A member, a movable core disposed within the guide member, a spring member that biases the movable core, a fixed magnetic pole disposed at one end of the case and bonded to one end of the guide member, and the rest of the case. In a solenoid for an electromagnetic valve, the solenoid includes a spring bearing member made of a magnetic material, which is disposed on an end side and is bonded and fixed to the other end of the guide member, and a joint portion between the fixed magnetic pole and the guide member, and the guide member and the spring bearing member. A solenoid for a solenoid valve, characterized in that the joint with the solenoid is joined by brazing.