JP6221093B2 - solenoid - Google Patents

Description

  The present invention relates to a solenoid, and relates to a solenoid whose exterior is composed of a plurality of constituent members.

  In a solenoid, in order to make it easy to attach to a flow rate adjustment valve of a hydraulic circuit, the exterior may be configured by combining members having different thicknesses, materials, or processing methods. Below, an example of the prior art which comprised the exterior by combining different members will be described.

  FIG. 10 is a cross-sectional view showing the structure of a solenoid according to the prior art. In FIG. 14, 100 is a solenoid valve, 101 is a solenoid unit, 102 is a magnetic path cylinder, 103 is a case, 104 is a second outer wall, 105 is a first outer wall, 106 is a step, and 107 is a valve operating unit. .

  FIG. 10 is an invention disclosed in Japanese Patent Laid-Open No. 10-241932. The solenoid unit 101 of the present invention is used by being incorporated in the electromagnetic valve 100. The internal mechanism of the solenoid unit 101 is housed in a case 103 that constitutes an exterior. The case 103 is formed so that the diameter of the first outer wall portion 105 is smaller than that of the second outer wall portion 104, and the first outer wall portion 105 is formed with respect to the magnetic path cylinder 102 constituting a part of the exterior. It is mated. The magnetic path cylinder 102 is fixed to the valve operation unit 107. As described above, the exterior is constituted by the magnetic path cylinder 102 and the case 103, so that the case 103 can be attached to the valve operating unit 107 without making it complicated.

  However, in the case of the above configuration, in order to prevent the hydraulic oil from leaking from the gap between the magnetic path cylinder 102 and the case 103, the first outer wall portion 105 that occupies almost the lower half of the case 103 is provided. It is necessary to press fit into the magnetic path cylinder 102. Thus, when it press-fits in the other party deeply, the thickness of the exterior of a solenoid will become these thickness substantially, and will exceed the thickness originally required as a case. In addition, if the position where the stepped portion 106 of the case 103 is formed varies, the case 103 is pressed into the magnetic path cylinder 102, so that the case 103 needs to be precisely processed. Cost increases. It is possible to weld the members that make up the exterior instead of the configuration that press fits deeply into the other party, but in the case of welding, the position of the central axis between the members and the total length of the solenoid are likely to be distorted due to the influence of heat. . Therefore, even if the members constituting the exterior are easily integrated, the operability and durability as a solenoid may be reduced.

JP-A-10-241932

  In order to solve the above problems, the present invention provides a solenoid whose exterior is composed of a plurality of structural members, and the structural members of the exterior are easily integrated with each other, and the operability and durability as a solenoid are improved. An object is to provide a solenoid that can be secured.

  According to a first aspect of the present invention, there is provided a movable magnetic pole slidably provided, a first flat surface formed in a substantially disc shape and orthogonal to the central axis of the movable magnetic pole, and the first A magnetic pole member having a hook-like portion formed with a second flat surface facing away from the flat surface, a substantially cylindrical shape, and an inner peripheral surface formed in a substantially cylindrical shape. The first exterior component member having the opening and the second opening, the first exterior component member being formed in a substantially cylindrical shape, and the inner peripheral surface being formed in a substantially cylindrical shape, and the first opening and the second A second exterior component member having a first opening portion, and the first exterior component member has a portion in the vicinity of the first opening portion having an inner diameter larger than the inner diameter of the central portion. It is formed as a thin part, and the step surface between the thin part and the central part is formed so as to be orthogonal to the central axis of the movable magnetic pole. In the second exterior component member, the vicinity of the second opening is formed as a thin part in which the inner diameter of the part is larger than the inner diameter of the central part. The step surface with the portion is formed so as to be orthogonal to the central axis of the movable magnetic pole, and the magnetic pole member is such that the second flat surface of the bowl-shaped portion is the step of the first exterior component member. The first flat surface is in contact with the stepped surface of the second exterior component, and the end surface on the first opening side of the first exterior component And an end face on the second opening side of the second exterior component member is joined by brazing.

  According to a second aspect of the present invention, in the first aspect of the present invention, the magnetic pole member is formed such that a peripheral side surface of the hook-shaped portion is parallel to a central axis of the movable magnetic pole, and the magnetic pole member In the member, a portion of the flange-shaped portion on the first exterior component member side is press-fitted into the thin portion of the first exterior component member, and a portion of the flange-shaped portion on the second exterior component member side is A solenoid that is press-fitted into the thin portion of the second exterior component member.

  According to a third aspect of the present invention, in the second aspect of the present invention, in the second exterior component member, the inner diameter of the portion near the second opening is larger than the inner diameter of the thin portion. The solenoid is characterized by being formed as another thin portion.

  According to a fourth aspect of the present invention, in the invention according to the second or third aspect, the magnetic pole member includes the peripheral side surface of the bowl-shaped portion, the first flat surface, and the second flat surface. It is the solenoid characterized by the corner | angular part between being chamfered.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the magnetic pole member includes an auxiliary magnetic pole portion formed in a substantially cylindrical shape, and the magnetic pole member includes the auxiliary magnetic pole portion. The solenoid further includes a bearing press-fitted into the auxiliary magnetic pole part and slidably supporting the movable magnetic pole.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, and is further provided integrally with the movable magnetic pole, and a tip side portion is the second exterior configuration. A shaft that protrudes from the first opening of the member, an auxiliary magnetic pole portion formed in a substantially cylindrical shape, and a hook-like portion formed in a substantially disk shape, Another magnetic pole member press-fitted into the second opening side of the first exterior component member, and press-fitted into the auxiliary magnetic pole part of the other magnetic pole member, and sliding on the proximal end portion of the shaft A solenoid having another bearing that supports the solenoid.

  The invention according to claim 7 is the invention according to claim 6, further comprising a fixed magnetic pole having a cylindrical portion formed in a substantially cylindrical shape, wherein the auxiliary magnetic pole portion of the another magnetic pole member is The solenoid is press-fitted into the cylindrical part of the fixed magnetic pole.

  According to the first aspect of the present invention, the step portion between the first exterior component member and the second exterior component member is in contact with the first flat surface and the second flat surface of the bowl-shaped portion. In addition, since the end surface on the first opening side of the first exterior component and the end surface on the second opening side of the second exterior component are joined by brazing, the base material is almost melted. Can be joined together, and the position of the central axis between the members and the total length of the solenoid do not get out of order. As a result, the operability and durability as a solenoid can be secured. Moreover, it is possible to perform brazing after accurately securing a slight gap suitable for brazing between the first exterior component and the second exterior component, and to improve the reliability of joining by brazing. It can also be secured.

  According to the second aspect of the present invention, since the hook-shaped portion of the magnetic pole member is press-fitted into the first exterior component member and the second exterior component member, the first exterior component member and the second exterior member are pressed. It can be easily realized that the central axes of the constituent members coincide with each other.

  According to the third aspect of the present invention, the inner diameter of the second exterior component in the vicinity of the second opening is further larger than the inner diameter of the thin portion, so that the portion between the thinner portion and the magnetic pole member Create a gap. Therefore, brazing can be easily performed by inserting an annular brazing material into the gap and assembling the solenoid.

  According to the fourth aspect of the present invention, when the flange-shaped portion of the magnetic pole member is press-fitted into the first exterior component member and the second exterior component member, the inner peripheral side of the opening of the exterior component member It is possible to prevent the press-fitting from being hindered by the edge of the hook being caught by the corner.

  According to the fifth aspect of the invention, since the bearing is press-fitted into the auxiliary magnetic pole portion of the magnetic pole member, the movable magnetic pole can be accurately slid in a predetermined direction.

  According to the sixth aspect of the present invention, since another bearing is press-fitted into the auxiliary magnetic pole portion of another magnetic pole member, the shaft can be accurately slid in a predetermined direction.

  According to the seventh aspect of the present invention, since the fixed magnetic pole can be accurately arranged in a predetermined direction, it is possible to prevent unnecessary friction between the fixed magnetic pole and the movable magnetic pole.

It is sectional drawing which shows the non-energized state of the solenoid which concerns on embodiment of this invention. It is sectional drawing which shows the electricity supply state of the solenoid which concerns on embodiment of this invention. It is a figure which shows the 2nd exterior component member which concerns on embodiment of this invention, (a) is sectional drawing, (b) is a front view. It is sectional drawing which shows the 1st exterior component member which concerns on embodiment of this invention. It is sectional drawing which shows the 2nd auxiliary | assistant magnetic pole which concerns on embodiment of this invention. It is sectional drawing (1) which shows the procedure of brazing in embodiment of this invention. It is sectional drawing (2) which shows the procedure of brazing in embodiment of this invention. It is sectional drawing (3) which shows the procedure of brazing in embodiment of this invention. It is sectional drawing (4) which shows the procedure of brazing in embodiment of this invention. It is sectional drawing which shows the solenoid valve equipped with the solenoid which concerns on a prior art.

  First, a solenoid according to an embodiment of the present invention will be described. FIG. 1 is a sectional view showing a non-energized state of the solenoid according to the embodiment of the present invention. In FIG. 1, 10 is a solenoid, 20 is a second exterior component, 21 is a small diameter portion, 23 is a large diameter portion, 25 is a first thin portion, 26 is a second thin portion, 30 is a first exterior component, 33 is a thin part, 36 is a first thin part, 37 is a second thin part, 40 is a second auxiliary magnetic pole, 41 is a bowl-shaped part, 46 is an auxiliary magnetic pole part, 50 is a first auxiliary magnetic pole, and 51 is a large diameter auxiliary. Magnetic pole part, 52 is a bowl-shaped part, 53 is a small-diameter auxiliary magnetic pole part, 54 is a fixed magnetic pole, 55 is a disk-like part, 56 is a fitting cylindrical part, 57 is a suction cylindrical part, 58 is a bottom face, 59 Is a through hole, 60 is a movable magnetic pole, 61 is a shaft, 62 is an end cap, 63 is a bowl-shaped portion, 64 is a bobbin, 65 is a coil, 66 is a lead wire, 67 is a bearing, 68 is a bearing, 69 is a spring, 70 And 71 are spacers, 72 and 73 are O-rings, 74 is a sealing resin, 75 is a brazing portion, and 76 is a filter. It is a wood storage space. Moreover, FIG. 2 is sectional drawing which shows the energization state of the solenoid which concerns on embodiment of this invention. The reference numerals used in FIG. 2 are the same as those in FIG.

  First, the outline of the solenoid 10 will be described. The solenoid 10 according to the embodiment of the present invention is a direct acting solenoid that is attached to a valve mainly used in a hydraulic circuit. That is, the solenoid 10 is configured to retract most of the shaft 61 protruding by the elastic force of the spring 69 into the second exterior component member 20 when the movable magnetic pole 60 is attracted to the fixed magnetic pole 54. In other words, when the movable magnetic pole 60 is energized to the coil 65, the fixed magnetic pole 54, the first auxiliary magnetic pole 50, the first exterior component 30, the second auxiliary magnetic pole 40, and the magnetic flux flowing around the movable magnetic pole 60, It slides so that the air gap may be reduced, and the state shown in FIG. 2 is obtained. When energization of the coil 65 is stopped, the coil 65 is pressed toward the second exterior component member 20 by the elastic force of the spring 69 provided between the bearing 67 and the spacer 70. The movable magnetic pole 60 slides toward the second exterior component member 20 by this pressing force, and a portion on the tip end side of the shaft 61 provided integrally with the movable magnetic pole 60 protrudes from the second exterior component member 20 as shown in FIG. It will be in the state shown in As can be seen from FIGS. 1 and 2, since the stroke length of the movable magnetic pole 60 is long and the shaft 61 is considerably longer than the movable magnetic pole 60, the movable magnetic pole 60 and the shaft are supported by two bearings of the bearing 67 and the bearing 68. 61 sliding is supported. In addition, the solenoid 10 joins the first exterior component member formed of a magnetic material and the second exterior component member 20 formed of a non-magnetic material by brazing as shown by a brazing portion 75 instead of welding or press fitting. At the same time, these exterior component members and the second auxiliary magnetic pole 40 are joined by brazing. It should be noted that the solenoid 10 may be used in a hydraulic circuit other than hydraulic pressure such as a hydraulic circuit, and can of course be used for applications other than the hydraulic circuit such as a control unit for position control. The second exterior component member 20 can also be formed of a magnetic material depending on the shape and size, the configuration of the apparatus to be mounted, and the like.

  Next, each component of the solenoid 10 will be described. FIG. 3 is a view showing a second exterior component member according to the embodiment of the present invention, in which (a) is a cross-sectional view and (b) is a front view. In FIG. 3, 22 is a stepped portion, 24 is an inner peripheral surface, 27 is an end surface, 28a and 28b are stepped surfaces, 29a and 29b are inner peripheral surfaces, and the other symbols are the same as those in FIG.

  The second exterior component member 20 is located on the distal end side of the shaft 61, and the inside is a space in which the movable magnetic pole 60 and the shaft 61 move. The side close to the base end portion of the shaft 61 is a large diameter portion 23 having a large diameter, and the side close to the tip end portion of the shaft 61 is a small diameter portion 21. The large-diameter portion 23 has an outer peripheral surface formed in a substantially hexagonal column shape, and an inner peripheral surface formed in a columnar shape. The opening on the large diameter portion 23 side faces the opening of the first exterior component 30 shown in FIG. 1, and is joined to the opening of the first exterior component 30 by brazing. Moreover, as shown to Fig.3 (a), the 1st thin part 25 and the 2nd thin part 26 are formed in the opening part vicinity part by the side of the large diameter part 23. As shown in FIG. The first thin portion 25 is thinned by scraping the inner peripheral surface side so that the inner diameter is larger than the inner diameter of the central portion. The second thin portion 26 is positioned closer to the opening than the first thin portion 25 and is thinner than the first thin portion 25. The second thin portion 26 is also thinned by shaving the inner peripheral surface side.

  By forming the first thin portion 25 and the second thin portion 26 as described above, the inner peripheral surface 29a and the inner peripheral surface are very narrow in the vicinity of the opening of the inner peripheral surface of the large diameter portion 23. 29b is formed. The diameter of the inner peripheral surface 29a is set to a size that allows the flanged portion 41 of the second auxiliary magnetic pole 40 to be press-fitted. As a result, the assembly accuracy of the solenoid 10 can be increased, that is, the center axis of the second exterior component member 20 and the center axis of the second auxiliary magnetic pole 40 can be easily matched when the solenoid 10 is assembled. As described above, when the solenoid 10 is assembled, the inner peripheral surface 29a and the outer peripheral surface of the flange-shaped portion 41 are in contact with each other, whereas the inner peripheral surface 29b has a larger diameter. A gap is formed between the outer peripheral surface. This gap is used to arrange the brazing material, as will be described later. By the way, by forming the first thin portion 25 and the second thin portion 26, the step surface 28a and the step surface 28b are formed. The step surface 28a and the step surface 28b are formed so as to be orthogonal to the central axis of the large diameter portion 23, and the step surface 28a is in contact with the flange portion 41 and joined by brazing after the solenoid 10 is assembled. It becomes a state. As will be described later, since the first exterior component 30 and the bowl-shaped portion 41 are brazed in the same manner, the gap between the second exterior component 20 and the first exterior component 30 is in the direction of the central axis of the flange-shaped portion 41. It can set suitably with the width | variety with respect to.

  The step surface 28b is formed to arrange the brazing material together with the inner peripheral surface 29b. Therefore, the widths of the stepped surface 28b and the inner peripheral surface 29b are set such that an annular brazing material can be disposed. Further, the end face 27 is opposed to the end face of the first exterior component 30 with a slight gap between the end face 27 and a space that infiltrates the brazing material when the annular brazing material is melted. Become. The small-diameter portion 21 is formed in a substantially cylindrical shape, is formed for incorporation in another device such as a valve unit of a solenoid valve, and has a thread on the outer peripheral surface. Further, the inner peripheral surface 24 of the small diameter portion 21 is formed in a substantially cylindrical shape, and a predetermined gap is set between the small diameter portion 21 and the shaft 61 so that hydraulic oil or the like can flow therethrough. Further, the stepped portion 22 between the small diameter portion 21 and the large diameter portion 23 is arranged so that the spacer 71 shown in FIG. 1 abuts, and the sliding of the movable magnetic pole 60 is performed through the spacer 71. 22.

  Next, the first exterior component member will be described. FIG. 4 is a cross-sectional view showing a first exterior component member according to the embodiment of the present invention. In FIG. 4, 31 is a central portion, 32 and 34 are inner peripheral surfaces, 35 is a stepped surface, 38a and 38b are inner peripheral surfaces, 39a and 39b are stepped surfaces, and other reference numerals are the same as those in FIG. .

  The first exterior component member 30 is formed in a substantially cylindrical shape and serves as a case of the main component parts of the solenoid 10 together with the second exterior component member 20. The first exterior component member 30 has a thin portion 33 at the opening portion near the distal end portion of the shaft 61, and a first thin portion 36 and a second thin portion 37 at the opening portion near the base end portion of the shaft 61. Is formed. The thin portion 33 is thinned by cutting the inner peripheral surface side so that the inner diameter is larger than the inner diameter of the central portion. By forming the thin portion 33, the inner peripheral surface 34 having a very narrow width is formed in the vicinity of the opening of the inner peripheral surface on the side close to the tip portion of the shaft 61 of the first exterior component 30. The diameter of the inner peripheral surface 34 is set to a size that allows the flanged portion 41 of the second auxiliary magnetic pole 40 to be press-fitted. Thereby, the assembly accuracy of the solenoid 10 can be increased, that is, the center axis of the first exterior component 30 and the center axis of the second auxiliary magnetic pole 40 can be easily matched when the solenoid 10 is assembled. As a result, the central axes of the first exterior component member 30 and the second exterior component member 20 can be made to coincide with each other, and the misalignment and inclination of the central axes that are likely to occur when the case is configured by two exterior component members. Occurrence can be reliably prevented.

  Further, a step surface 35 is formed between the inner peripheral surface 34 and the inner peripheral surface 32. The step surface 35 is formed so as to be orthogonal to the central axis of the first exterior component member 30 and, after the solenoid 10 is assembled, is in contact with the flange 41 and joined by brazing. Since the bowl-shaped part 41 can be formed from a general magnetic material, it is extremely easy to set the thickness in units of 0.1 mm, and it is particularly difficult to set in units of 0.01 mm. is not. Accordingly, the gap between the opposing end surfaces of the first exterior component member 30 and the second exterior component member 20 is also adjusted to a suitable size in units of 0.1 mm or less so that the brazing material is sufficiently infiltrated. Is possible. Therefore, in this embodiment, even if the case of the solenoid 10 is constituted by two exterior constituent members, these can be appropriately brazed, so that there is no problem in the strength and durability of the case.

  Similarly, the first thin portion 36 is thinned by cutting the inner peripheral surface side so as to be larger than the inner diameter of the central portion. The second thin portion 37 is located closer to the opening than the first thin portion 36 and is thinner than the first thin portion 36. The second thin portion 37 is also thinned by shaving the inner peripheral surface side. By forming the first thin portion 36 and the second thin portion 37, an inner peripheral surface 38a and an inner peripheral surface 38b having a very narrow width are formed in the opening portion on the side close to the base end portion of the shaft 61. In addition, the second thin portion 37 is made thin in consideration of caulking the tip end side after the end cap 62 is press-fitted. The diameter of the inner peripheral surface 38a of the first thin portion 36 is set to a size that allows the flange-shaped portion 52 of the first auxiliary magnetic pole 50 shown in FIG. As a result, the assembly accuracy of the solenoid 10 is increased, that is, the center axis of the bearing 67 press-fitted into the large-diameter auxiliary magnetic pole part 51 and the small-diameter auxiliary magnetic pole part 53 of the first auxiliary magnetic pole 50 and the second auxiliary magnetic pole 40. It is possible to prevent a deviation from occurring in the center axis of the bearing 68 press-fitted into the auxiliary magnetic pole portion 46, and to provide a highly reliable solenoid. The inner peripheral surface 38b is set to a size that allows the end cap 62 to be press-fitted. Further, by forming the first thin portion 36 and the second thin portion 37, the step surface 39a and the step surface 39b are formed. The step surface 39 a and the step surface 39 b are formed so as to be orthogonal to the central axis of the central portion 31. Since the stepped surface 39a comes into contact with the flanged portion 52 after the flanged portion 52 is press-fitted, the center axis of the bearing 68 press-fitted into the auxiliary magnetic pole portion 46 is prevented from being inclined with respect to the original direction. effective. Further, the end cap 62 abuts on the step surface 39b.

  Next, the second auxiliary magnetic pole will be described. FIG. 5 is a cross-sectional view showing a second auxiliary magnetic pole according to the embodiment of the present invention. In FIG. 5, 42a is a second flat surface, 42b is a first flat surface, 43 is a peripheral side surface, 44 and 45 are chamfered portions, 47 is an inner peripheral surface, 48 is a stepped surface, 49 is an annular groove, All reference numerals are the same as those in FIG.

  The second auxiliary magnetic pole 40 has a role of securing a long stroke length of the movable magnetic pole 60 and a role of holding these exterior component members in order to accurately join the first exterior component member 30 and the second exterior component member 20. Together. That is, the second auxiliary magnetic pole 40 is composed of two parts, that is, the auxiliary magnetic pole part 46 and the flanged part 41. The auxiliary magnetic pole portion 46 generates a flow of magnetic flux between the peripheral side surface of the movable magnetic pole 60 when the coil 65 is energized and constitutes a magnetic circuit with the other magnetic poles. Generate a suction force in between. Further, the base end portion side of the shaft 61 of the second auxiliary magnetic pole 40 is formed thin, and a bearing 68 is press-fitted into the inner peripheral surface 47 of the thin portion. The bearing 68 is press-fitted so as to abut on a step surface 48 between the inner peripheral surface 47 and the tip end side of the shaft 61. With this structure, the bearing 68 can be accurately arranged at a predetermined position. Further, an annular groove 49 for holding the O-ring 73 shown in FIG. 1 at a predetermined site is formed on the outer peripheral surface of the auxiliary magnetic pole portion 46.

  The flange 41 is formed so as to expand in a disc shape from the end of the auxiliary magnetic pole 46 on the base end side of the shaft 61. The first flat surface 42 b that is the surface on the first exterior component member 30 side of the auxiliary magnetic pole portion 46 and the second flat surface 42 a that is the surface on the second exterior component member 20 side are on the central axis of the auxiliary magnetic pole portion 46. The center axis of the first exterior component member 30 and the second exterior component member 20 and the center axis of the auxiliary magnetic pole portion 46 are coincident with each other so that the center axis of the bearing 68 is formed. Can be matched exactly. The peripheral side surface 43 of the bowl-shaped portion 41 is also formed so as to coincide with the central axis of the auxiliary magnetic pole portion 46, and the center axis of the first exterior component member 30 and the second exterior component member 20 and the bearing 68 are arranged. The center axis can be matched precisely. In addition, the vicinity of the two edges of the peripheral side surface 43 is chamfered to form a chamfered portion 44 and a chamfered portion 45. The chamfered portion 44 and the chamfered portion 45 are such that when the flange-shaped portion 41 is sequentially press-fitted into the second exterior component member 20 and the first exterior component member 30, the corner portions of the flange-shaped portion 41 are the second exterior component member 20. Alternatively, it is formed so that it can be smoothly press-fitted without being caught in the opening of the first exterior component 30.

  Returning to FIG. 1 and FIG. The first auxiliary magnetic pole 50 has both the role of a magnetic pole on the side where the fixed magnetic pole 54 and the movable magnetic pole 60 are attracted, and the role of accurately holding the fixed magnetic pole 54 at a predetermined position. That is, the first auxiliary magnetic pole 50 is composed of two parts, an auxiliary magnetic pole part composed of a large-diameter auxiliary magnetic pole part 51 and a small-diameter auxiliary magnetic pole part 53 and a hook-shaped part 52. The large-diameter auxiliary magnetic pole portion 51 is a portion that is continuous with the bowl-shaped portion 52 and is formed in a substantially cylindrical shape. While being inserted into the hollow part of the bobbin 64, the base end part side of the shaft 61 is inserted into the opening part in the center. Further, a small-diameter auxiliary magnetic pole portion 53 is formed in the hollow portion on the center side, and a bearing 67 is press-fitted. The small-diameter auxiliary magnetic pole portion 53 has an outer diameter smaller than that of the large-diameter auxiliary magnetic pole portion 51 in order to press-fit the fixed magnetic pole 54. The fixed magnetic pole 54 that has been press-fit does not reach the step portion between the large-diameter auxiliary magnetic pole portion 51 and the small-diameter auxiliary magnetic pole portion 53, and a gap is formed between them. An O-ring 72 is disposed in this gap. As described above, the hook-like portion 52 is press-fitted into the first thin portion 36 of the first exterior component member 30, but is not a complete disc shape, and the lead wire 66 is provided at a portion not shown in FIG. 1. A cut for insertion is formed.

  The fixed magnetic pole 54 has a disc-like portion 55 disposed at the center, and a fitting tubular portion 56 extends along the central axis of the disc-like portion 55 on the base end side of the shaft 61, so that the suction tubular portion 57. Extends along the central axis of the disc-like portion 55 toward the proximal end portion of the shaft 61. The fitting tubular portion 56 is formed in a substantially truncated cone shape, and a through hole is formed along the central axis. It is press-fitted into the small-diameter auxiliary magnetic pole portion 53 and serves as a fixing means for the fixed magnetic pole 54 and also a means for accurately directing the suction cylindrical portion 57 in a predetermined direction. Further, the through hole of the suction cylindrical portion 57 is continuous with the through hole 59 of the disc-like portion 55, and the shaft 61 and the spring 69 are inserted therethrough. When the coil 65 is energized, as shown in FIG. 2, the movable magnetic pole 60 is attracted toward the bottom surface 58 of the suction cylindrical portion 57, but since the sticking prevention spacer 70 is provided, the movable magnetic pole 60 is provided. Does not touch the bottom surface 58 directly. The movable magnetic pole 60 is formed in a substantially cylindrical shape, and a shaft 61 is press-fitted into a through hole formed along the central axis.

  The spring 69 is supported in a state where the base end side of the shaft 61 is in contact with the stepped portion of the hollow portion of the bearing 67, and the tip end side of the shaft 61 is in contact with the spacer 70. When the coil 65 is not energized, the movable magnetic pole 60 is pressed against the spacer 71 by extending the inside of the fitting tubular portion 56 as shown in FIG. When the coil 65 is energized, the spring 69 is pushed into the through hole 59 by the attractive force acting on the movable magnetic pole 60 as shown in FIG. The bobbin 64 is accommodated in a space surrounded by the first exterior component member 30, the first auxiliary magnetic pole 50, the fixed magnetic pole 54, and the second auxiliary magnetic pole 40. Further, O-rings 72 and 73 are provided between the bobbin 64 and the first auxiliary magnetic pole 50 and the second auxiliary magnetic pole 40 so that the hydraulic oil does not enter the coil 65. The end cap 62 closes the side where the first auxiliary magnetic pole 50 and the shaft 61 are disposed. A circuit board or the like may be provided inside the end cap 62 as long as the operation of the shaft 61 is not hindered. The hook-shaped portion 63 of the end cap 62 is press-fitted into the second thin portion 37 of the first exterior component member 30, and the second thin portion 37 is caulked to seal the periphery of the hook-shaped portion 63. Further, the cuts through which the lead wires 66 are inserted are sealed with a sealing resin 74. The bearings 67 and 68 are drive bushes, but other types of bearings may be used, and a sleeve may be used depending on the configuration of the solenoid.

  Subsequently, a brazing procedure in the embodiment of the present invention will be described. FIG. 6 is a cross-sectional view (1) showing the procedure of brazing in the embodiment of the present invention. In FIG. 6, reference numeral 80 denotes a brazing material, and other reference numerals are the same as those in FIG. Moreover, FIG. 7 is sectional drawing (2) which shows the procedure of brazing in embodiment of this invention. Reference numerals used in FIG. 7 are the same as those in FIGS. 1 and 6. FIG. 8 is a cross-sectional view (3) showing the procedure of brazing in the embodiment of the present invention. The reference numerals used in FIG. 8 are the same as those in FIGS. In addition, FIG. 9 is a cross-sectional view (4) showing the procedure of brazing in the embodiment of the present invention. In FIG. 9, reference numeral 81 denotes a brazing material, and other reference numerals are the same as those in FIGS.

  In the embodiment of the present invention, the second exterior component member 20, the first exterior component member 30, and the second auxiliary magnetic pole 40 are joined to each other by brazing. The assembly of the movable magnetic pole 60, the shaft 61, the fixed magnetic pole 54, and the like can be appropriately performed after brazing. First, as shown in FIG. 6, preparation is made so that the small-diameter portion 21 of the second exterior component member 20 faces downward and the central axis is vertical. Then, the brazing material 80 is placed in the brazing material storage space 76. Next, as shown in FIG. 7, the portion on the second exterior component member 20 side of the flange 41 of the second auxiliary magnetic pole 40 is press-fitted into the first thin portion 25 of the second exterior component member 20. Further, as shown in FIG. 8, the first exterior component member 30 is covered with the second auxiliary magnetic pole 40 from above so that the thin portion 33 is closer to the first exterior component member 30 side of the flange portion 41. Press fit the part. Next, as shown in FIG. 9, a brazing material 81 is placed on the bowl-shaped portion 41. Then, the brazing materials 80 and 81 are melted by heating the vicinity of the parts to be brazed of the second exterior component member 20, the first exterior component member 30 and the second auxiliary magnetic pole 40. The molten brazing material 80 flows out of the brazing material storage space 76 and infiltrates into the gap between the bowl-shaped portion 41 and the first thin portion 25 of the second exterior component member 20. Further, the brazing material 81 infiltrates into the gap between the flange portion 41 and the thin portion 33 of the first exterior component 30, and further, the second thin portion 26 and the first exterior component of the second exterior component 20. It also infiltrates into the gap with 30 thin portions 33. The brazing materials 80 and 81 may be melted by placing the second exterior component member 20, the first exterior component member 30 and the second auxiliary magnetic pole 40 in a vacuum furnace for brazing and heating them all.

When brazing is performed according to the above procedure, brazing can be performed more easily than when brazing material is applied from the outside of the first exterior component 30 and the second auxiliary magnetic pole 40. In addition, since brazing is performed with the first exterior component member 30 positioned on the second exterior component member 20, the molten brazing material 81 infiltrates into the gap between the bowl-shaped portion 41 and the thin portion 33 by its own weight. It becomes easy to do and it becomes difficult to spread on the surface of the bowl-shaped part 41 wastefully. In order to prevent the brazing material 81 from spreading into the surface of the bowl-shaped part 41 without infiltrating the gap between the bowl-shaped part 41 and the thin part 33, the brazing material 81 has an inner part of the central part 31 of the first exterior component member 30. The diameter is preferably in contact with the peripheral surface. Further, when the first exterior component member 30 is thicker than the second exterior component member 20, another thin portion corresponding to the second thin portion 26 is formed in the thin portion 33, and the brazing material A space corresponding to the storage space 76 is formed. At the same time, a thin portion corresponding to the thin portion 33 is formed in the second exterior component member 20 by one step. Then, contrary to the above-described procedure, it is desirable to perform brazing in a state where the second exterior component member 20 is positioned on the first exterior component member 30. As yet another example, the vicinity of the edge of the peripheral side surface of the bowl-shaped portion 41 is cut to form a gap between the first exterior component 30 or the second auxiliary magnetic pole 40 and correspond to the brazing material storage space 76. It is possible that the first exterior component member 30 and the second auxiliary magnetic pole 40 do not have such a space.

  As described above, in the solenoid 10 according to the embodiment of the present invention, the step surface 35 of the first exterior component member 30 and the step surface 28a of the second exterior component member 20 are connected to the bowl-shaped portion of the second auxiliary magnetic pole 40. 41, in contact with the first flat surface 42b and the second flat surface 42a, the end surface on the step surface 35 side of the first exterior component 30 and the second thin portion 26 side of the second exterior component 20 Since the end surfaces of the first and second exterior components 30 and 20 are joined by brazing, the first exterior component 30 and the second exterior component 20 can be joined with almost no melting, and the center axis position between the members and the total length of the solenoid 10 are not distorted. Each central axis coincides with the central axis of the movable magnetic pole 60. Moreover, it is possible to perform brazing while accurately securing a small gap suitable for brazing between the first exterior component member 30 and the second exterior component member 20, and to improve the reliability of joining by brazing. It can also be secured. Further, since the flange 41 of the second auxiliary magnetic pole 40 is press-fitted into the first exterior component 30 and the second exterior component 20, the center between the first exterior component 30 and the second exterior component 20. Matching the axes can be easily realized. Further, since the first auxiliary magnetic pole 50 and the second auxiliary magnetic pole 40 are press-fitted into the first exterior component 30, the bearing 67 and the bearing 68 press-fitted into these can be accurately arranged and are movable. It is easy to slide the magnetic pole 60 and the shaft 61 in a predetermined direction.

  Furthermore, a first thin portion 25 having a larger inner diameter than the center and a second thin portion 26 having a larger inner diameter are formed in the vicinity of the opening on the flange-shaped portion 41 side of the second auxiliary magnetic pole 40 of the second exterior component member 20. Therefore, a gap is generated between the second thin portion 26 and the bowl-shaped portion 41. Therefore, brazing can be easily performed by assembling the solenoid 10 after inserting the annular brazing material 80 into the gap in advance. Further, when the collar-shaped portion 41 is press-fitted into the first exterior component member 30 and the second exterior component member 20, the inner periphery side of the opening of the first exterior component member 30 or the second exterior component member 20. It is possible to prevent the edge from being caught by the corner and preventing the press-fitting. In addition, since the bearing 68 is press-fitted into the auxiliary magnetic pole portion 46 of the second auxiliary magnetic pole 40, the movable magnetic pole can be accurately slid in a predetermined direction. Further, since the bearing 67 is press-fitted into the large-diameter auxiliary magnetic pole portion 51 and the small-diameter auxiliary magnetic pole portion 53 of the first auxiliary magnetic pole 50, the shaft 61 can be accurately slid in a predetermined direction. Further, since the flange-shaped portion 52 of the first auxiliary magnetic pole 50 is press-fitted into the first exterior component 30, the large-diameter auxiliary magnetic pole portion 51 and the small-diameter auxiliary magnetic pole portion 53 of the first auxiliary magnetic pole 50 are directed in a predetermined direction. Therefore, it is possible to prevent the unnecessary friction between the fixed magnetic pole 54 and the movable magnetic pole 60.

  The present invention is not limited to the contents described above. For example, a shaft-like protrusion may be provided on the fixed magnetic pole itself, instead of providing a shaft on the fixed magnetic pole. Further, an oil passage for holding the spool with respect to the fixed magnetic pole and a spool may be provided so as to be integrated with the valve. Furthermore, it is possible to separate the part having the function as a cover of the auxiliary magnetic pole and the part only functioning as the auxiliary magnetic pole, and to make them independent components. As described above, various modifications can be made without departing from the scope described in each claim.

10 Solenoid 20 Second exterior component 21 Small diameter portion 22 Step portion 23 Large diameter portion 24 Inner peripheral surface 25 First thin portion 26 Second thin portion 27 End surface 28a Step surface 28b Step surface 29a Inner peripheral surface 29b Inner peripheral surface 30 First exterior component 31 Central portion 32 Inner peripheral surface 33 Thin portion 34 Internal peripheral surface 35 Step surface 36 First thin portion 37 Second thin portion 38a Inner peripheral surface 38b Inner peripheral surface 39a Stepped surface 39b Stepped surface 40 Second auxiliary Magnetic pole 41 Hook-shaped portion 42a Second flat surface 42b First flat surface 43 Peripheral side surface 44 Chamfered portion 45 Chamfered portion 46 Auxiliary magnetic pole portion 47 Inner peripheral surface 48 Step surface 49 Annular groove 50 First auxiliary magnetic pole 51 Hook-shaped portion 53 Small-diameter auxiliary magnetic pole portion 54 Fixed magnetic pole 55 Disk-shaped portion 56 Fitting tube-shaped portion 57 Suction tube-shaped portion 58 Bottom surface 59 Through-hole 60 Movable magnetic pole 61 Shaft 62 End cap 63 Wedge-shaped portion 64 Bin 65 Coil 66 Lead wire 67 Bearing 68 Bearing 69 Spring 70 Spacer 71 Spacer 72 O-ring 73 O-ring 74 Sealing resin 75 Brazing part 76 Brazing material storage space 80 Brazing material 81 Brazing material 100 Electromagnetic valve 101 Solenoid unit 102 Magnetic path Tube 103 Case 104 Second outer wall portion 105 First outer wall portion 106 Stepped portion 107 Movable magnetic pole

Claims (5)

A movable magnetic pole slidably provided;
A bowl-shaped portion formed in a substantially disc shape and having a first flat surface orthogonal to the central axis of the movable magnetic pole and a second flat surface facing away from the first flat surface. A magnetic pole member provided;
A first exterior component member formed in a substantially cylindrical shape and having an inner peripheral surface formed in a substantially cylindrical shape and having a first opening and a second opening;
A second exterior component member having a substantially cylindrical shape and an inner peripheral surface formed in a substantially cylindrical shape, and having a first opening and a second opening ;
A shaft provided integrally with the movable magnetic pole and having a tip end portion protruding from the first opening of the second exterior component member;
An auxiliary magnetic pole portion formed in a substantially cylindrical shape and a flange-shaped portion formed in a substantially disk shape are provided, and the flange-shaped portion is press-fitted into the second opening side of the first exterior component member. Another magnetic pole member;
Another bearing that is press-fitted into the auxiliary magnetic pole portion of the another magnetic pole member and that slidably supports the proximal end portion of the shaft ;
In the first exterior component, the portion near the first opening is formed as a thin portion in which the inner diameter of the portion is larger than the inner diameter of the central portion, and the thin portion and the central portion Is formed so that the step surface is perpendicular to the central axis of the movable magnetic pole,
In the second exterior component member, a portion in the vicinity of the second opening is formed as a thin portion in which the inner diameter of the portion is larger than the inner diameter of the central portion, and the thin portion and the central portion Is formed so that the step surface is perpendicular to the central axis of the movable magnetic pole,
In the magnetic pole member, the second flat surface of the bowl-shaped portion is in contact with the step surface of the first exterior component member, and the first flat surface is the second exterior component member of the second exterior component member. Provided to contact the stepped surface,
An end face on the first opening side of the first exterior constituent member and an end face on the second opening side of the second exterior constituent member are joined by brazing. The magnetic pole member is formed so that a peripheral side surface of the bowl-shaped portion is parallel to a central axis of the movable magnetic pole,
In the magnetic pole member, a portion of the flange-shaped portion on the first exterior component member side is press-fitted into the thin portion of the first exterior component member, and the portion of the flange-shaped portion on the second exterior component member side is pressed. The solenoid according to claim 1, wherein a portion is press-fitted into the thin portion of the second exterior component member. 3. The solenoid according to claim 2 , wherein the magnetic pole member has chamfered corners between the peripheral side surface of the bowl-shaped portion and the first flat surface and the second flat surface. . The magnetic pole member includes an auxiliary magnetic pole portion formed in a substantially cylindrical shape,
4. The solenoid according to claim 1, further comprising a bearing press-fitted into the auxiliary magnetic pole portion of the magnetic pole member and slidably supporting the movable magnetic pole. 5. Furthermore, it has a fixed magnetic pole with a cylindrical portion formed in a substantially cylindrical shape,
The solenoid according to any one of claims 1 to 4, wherein the auxiliary magnetic pole part of the another magnetic pole member is press-fitted into the cylindrical part of the fixed magnetic pole.

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