JP5301243B2 - solenoid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid ensuring the response and pressure resistance. <P>SOLUTION: A solenoid 1 in which a shaft 5, joined to a plunger 4, is moved in its axial direction to drive a base unit includes a magnetic circuit that introduces a magnetic field generated around a coil 12 to the plunger 4; the magnetic circuit is formed by a case 9, a base 2, and a sleeve 3, which are made of a magnetic material. The solenoid 1 also has at least a pressure vessel 90, which accommodates the plunger 4 and the shaft 5, formed by the case 9, the base 2, and the sleeve 3, the base flanges 66 protruding from the base 2 in the radial direction of the shaft 5, and case flanges 91 protruding from the case 9 in the radial direction of the shaft 5; each flange 66, and its case flange 91 being mutually assembled via a common bolt and clamped to a mounting table of the base unit. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a solenoid that slides a shaft in an axial direction by a magnetic field generated in a coil.

The solenoid disclosed in Patent Document 1 drives a plunger by a magnetic field generated in a coil and drives a valve of a mother machine coupled to the plunger.
JP 11-336934 A

  However, in such a conventional solenoid, since the flange (bracket) for attaching the solenoid case to the mother machine is formed separately from the case, there is a problem that the attachment portion of the case is enlarged. It was.

  Further, such a conventional solenoid has a structure for holding the pressure in the case, and it is difficult to ensure sufficient pressure resistance.

  The present invention has been made in view of the above problems, and an object thereof is to provide a solenoid that simplifies the mounting structure and ensures pressure resistance.

The present invention is a solenoid for driving a plunger by driving a plunger by a magnetic field generated in a coil, moving a shaft coupled to the plunger in an axial direction, and driving a mother machine. A case made of a magnetic material, comprising a cylindrical base disposed on the open end side of the case inside, and a cylindrical sleeve disposed on the back side of the case inside the coil and facing the base with a magnetic gap The base and the sleeve constitute a magnetic circuit for guiding the magnetic field generated around the coil to the plunger, and at least the case, the base and the sleeve constitute a pressure vessel for accommodating the plunger and the shaft. protruding, projecting base flange formed by the base and integrally from the case in a radial direction of the shaft Kesufura A di, and configured to fasten the mounting seat of the mother ship by polymerizing with each other the base flange and the case flange via a common bolt.
The present invention also includes a base flange projecting from the base, a base flange that contacts the base flange and is fixed to the base, and the base flange and the case flange are overlapped with each other via a common bolt. It is configured to be fastened to the mounting seat of the mother machine.

  According to the present invention, the base flange and the case flange are overlapped with each other and fastened to the mounting seat of the mother machine, so that the base is fixed in the axial direction with respect to the case, and the pressure vessel is constituted by the case, the base and the sleeve. The working fluid pressure generated within can be maintained. As a result, it is possible to prevent the working fluid flowing into the pressure vessel containing the plunger and the shaft from the mother machine from leaking out of the solenoid, and to ensure the pressure resistance of the solenoid.

  Since the bolt that overlaps and fastens the base flange and the case flange also serves to fasten the solenoid to the mounting seat of the mother machine, the number of bolts provided on the solenoid is reduced, and the mounting structure is simplified.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a front view of the solenoid 1, and FIG. 2 is a cross-sectional view taken along line A-O-A in FIG.

  The solenoid 1 is an electromagnetic actuator that drives the plunger 4 by a magnetic field generated in the coil 12 and slides the shaft 5 coupled to the plunger 4 in the axial direction.

  The solenoid 1 is attached to a mother machine of a hydraulic device (not shown). The end 52 of the shaft 5 is linked to a hydraulic valve provided in the mother machine, and opens and closes the hydraulic valve.

  Not limited to this, the solenoid 1 may be provided in a pneumatic device, other machine, or facility, and may drive a pneumatic valve or other movable part.

  The solenoid 1 includes a case 9, a base 2, a sleeve 3, a plunger 4, a shaft 5, a gap embedded body 6, first and second bearings 7 and 8, a pressure resistant tube 17, a coil assembly 10, and the like.

  The coil assembly 10 includes a cylindrical bobbin 11 having flanges at both ends, a coil 12 formed by winding a magnet wire around the bobbin 11, and a pair of terminals coupled to both ends of the magnet wire of the coil 12. 13 and a mold resin 14 surrounding the coil 12.

  The mold resin 14 includes a cylindrical enclosure 16 in which the bobbin 11 and the coil 12 are accommodated, and a connector 15 that protrudes from one end of the enclosure 16 and faces the terminal 13. A mating connector (not shown) is inserted into the connector portion 15. When the coil 12 is energized through this mating connector, a magnetic field is generated inside the coil 12. Not limited to this, the coil 12 may be energized via a lead wire.

  As a magnetic path constituting member for guiding the magnetic flux of the coil 12, a case 9, a base 2, a plunger 4, and a sleeve 3 are provided, which are each formed of a magnetic material.

  1 and 2, O is the center line of the shaft 5. A cylindrical plunger 4 is fitted to the outer periphery of the shaft 5 and coupled by welding or caulking.

  The case 9 is formed in a bottomed cylindrical shape and has a pair of case flanges 91 protruding from the opening end. Bolt holes 98 are opened in the case flanges 91 and are fastened to the mounting seat of the mother machine by two bolts (not shown) that pass through the bolt holes 98.

  A coil assembly 10 is accommodated inside the case 9. A notch 97 opening on the side surface of the case 9 is formed, and the connector 15 projects from the notch 97.

  In FIG. 1, each case flange 91 protrudes in a radial direction orthogonal to the center line O of the shaft 5, and the connector portion 15 protrudes in a direction orthogonal to the center line of each case flange 91.

  Not only this but the direction which case flange 91 and connector part 15 project is arbitrarily arranged according to the shape of the other party to which solenoid 1 is attached. For example, the connector part 15 may be protruded in the center line O direction, and the mating connector may be inserted / removed in the center line O direction.

  The cylindrical base 2 and the sleeve 3 are arranged on the inner side of the case 9 and coaxially with the center line O, and the shaft 5 and the plunger 4 are inserted into the inner sides thereof. The base 2 is disposed on the opening end side of the case 9, and the sleeve 3 is disposed on the back side of the case 9.

  The case 9 has a case inner cylindrical portion 36 that protrudes in a cylindrical shape from the bottom. The case inner cylinder portion 36 is formed coaxially with the center line O of the shaft 5.

  The sleeve 3 has a sleeve outer peripheral surface 31 fitted into the inner peripheral surface of the bobbin 11, an inner peripheral surface 33 fitted into the case inner cylindrical portion 36 by press-fitting, and an end surface 32 abutting against the bottom surface 93 of the case 9. The shaft 5 is in contact with the center line O of the shaft 5 and is coaxial. The inner peripheral surface 33 of the sleeve 3 abuts on the outer peripheral surface 38 of the case inner cylindrical portion 36 without a gap, and a metal seal is formed by these abutting portions.

  The metal pressure-resistant tube 17 made of a nonmagnetic material is formed in a thin cylindrical shape, and is fitted to the outer peripheral surface 25 of the base 2 and the outer peripheral surface 31 of the sleeve 3.

  A layered seal 19 is interposed between the inner peripheral surface 18 of the pressure-resistant tube 17, the outer peripheral surface 25 of the base 2, and the outer peripheral surface 31 of the sleeve 3. This layered seal 19 expands and deforms due to the pressure received by it, and seals between the inner peripheral surface 18 of the pressure-resistant tube 17 and the outer peripheral surface 25 of the base 2 and the outer peripheral surface 31 of the sleeve 3.

  The layered seal 19 is provided over substantially the entire inner peripheral surface 18 of the pressure-resistant tube 17. Thereby, even if the magnetic gap between the base 2 and the sleeve 3 is an air gap, sufficient sealing performance can be obtained.

  The layered seal 19 is provided over substantially the entire inner peripheral surface 18 of the pressure-resistant tube 17, but is not limited thereto, and may be provided over the magnetic gap between the base 2 and the sleeve 3 and the vicinity thereof.

  Alternatively, the inner peripheral surface 18 of the pressure-resistant tube 17 may be press-fitted into the outer peripheral surface 25 of the base 2 and the outer peripheral surface 31 of the sleeve 3, and a metal seal may be formed by these abutting portions.

  The pressure tube 17 has an axial length equal to that of the bobbin 11, and one end 17 a abuts against the base flange 21 of the base 2 without a gap, and the other end 17 b abuts against the bottom surface 93 of the case 9 without a gap. A metal seal is formed at these contact portions.

  The case 9, the base 2, the pressure-resistant tube 17, and the sleeve 3 constitute a pressure vessel 90 that accommodates the plunger 4 and the shaft 5, and hydraulic oil (working fluid) flowing from the mother machine into the solenoid 1 is outside the solenoid 1. To prevent leakage.

  The pressure tube 17 may be eliminated, and an O-ring may be interposed between the base 2, the sleeve 3, and the coil assembly 10, and the pressure vessel 90 may be configured by the case 9, the base 2, the sleeve 3, and the coil assembly 10. .

  A disc-shaped base flange 21 is formed at one end of the base 2, and a pair of base flanges 66 projecting in a radial direction perpendicular to the center line O of the shaft 5 is formed from the base flange 21.

  The base flange 21 and the base flange 66 are integrally formed with the base 2.

  The base flange 66 overlaps with a pair of case flanges 91 protruding from the case 9. The back surface 67 of the base flange 66 contacts the end surface 96 of the case flange 91. The back surface 67 of the base flange 66 and the end surface 96 of the case flange 91 are each formed in a planar shape orthogonal to the center line O of the shaft 5.

  A bolt hole 68 is opened in the base flange 66, and the bolt hole 68 communicates with a bolt hole 98 opened in the case flange 91.

  The base flange 66 and the case flange 91 are fastened to a mounting seat of a mother machine (not shown) by two bolts (not shown) that pass through the respective bolt holes 68 and 98. An end surface 79 of the base flange 66 abuts against the mounting seat of the mother machine.

  Thus, the base flange 66 and the case flange 91 are fastened to each other, whereby the base 2 is fixed in the axial direction with respect to the case 9, and the pressure vessel 90 configured by the case 9, the base 2, the pressure-resistant tube 17, and the sleeve 3. The working fluid pressure generated within can be maintained.

  An annular step 24 is formed on the outer peripheral surface of the base flange 21. A caulking portion 95 is formed at the opening end of the case 9, and the caulking portion 95 is engaged with the annular step portion 24, thereby preventing the base 2 from coming off. Thus, the base 1 is prevented from being detached from the case 9 even when the solenoid 1 is in a state before being assembled to the mother machine.

  An annular gap 55 is formed between the inner peripheral surface 33 of the sleeve 3 and the plunger outer peripheral surface 41.

  The shaft 5 is made of a nonmagnetic material, passes through the sleeve 3 and the base 2, and is supported so as to be slidable in the direction of the center line O via the first and second bearings 7 and 8. The plunger 4 is disposed between the first and second bearings 7 and 8.

  The second bearing 8 is attached by fitting its outer peripheral surface 81 to the inner peripheral surface 37 of the case inner cylindrical portion 36.

  The base 2 has base inner peripheral surfaces 26 to 29 that gradually increase in diameter on the inner periphery thereof.

  The base inner peripheral surface 26 having the smallest diameter defines a gap 56 between the base outer peripheral surface 51 and the outer peripheral surface 51 of the shaft 5.

  The outer peripheral surface 71 of the first bearing 7 is fitted and attached to the base inner peripheral surface 27 having the second smallest diameter.

  An annular gap 55 is formed between the base inner peripheral surface 29 having the largest diameter and the plunger outer peripheral surface 41.

  FIG. 3 is an enlarged cross-sectional view around the plunger 4. As also shown, an annular step 46 is formed between the base inner peripheral surface 28 and the base inner peripheral surface 29 in the base 2. The annular step 46 is formed in a planar shape orthogonal to the center line O of the shaft 5 and faces the plunger front end face 47 in parallel.

The base 2 has an annular tapered end surface 45 that is inclined with respect to the center line O of the shaft 5. On the other hand, the sleeve 3 has an annular end surface 35 orthogonal to the center line O of the shaft 5. An annular magnetic gap is formed between the annular tapered end surface 45 of the base 2 and the annular end surface 35 of the sleeve 3 . The annular end face 35 may be inclined without being orthogonal to the center line O.

  The magnetic flux generated inside the coil 12 is guided by the case 9, the base 2, the plunger 4, and the sleeve 3. Since the magnetic flux passing between the base 2 and the sleeve 3 is blocked by the magnetic gap, the magnetic flux is directed through the plunger 4 to ensure the magnetic flux density from the base 2 toward the plunger 4.

  The shape and position of the magnetic gap are arbitrarily set, and a solenoid thrust force corresponding to a stroke in which the plunger 4 moves in the direction of the center line O is obtained.

  A gap buried body 6 made of a nonmagnetic material is interposed in the magnetic gap. The gap embedded body 6 abuts on each of the annular tapered end surface 45 of the base 2 and the annular end surface 35 of the sleeve 3.

  The gap embedded body 6 may not be interposed between the annular tapered end surface 45 of the base 2 and the annular end surface 35 of the sleeve 3, and a gap may be provided.

  The solenoid 1 is provided with a first bearing front chamber 73, a plunger front chamber 74, a plunger back chamber 75, and a second bearing back chamber 76 around the shaft 5 and the plunger 4, and hydraulic oil from the mother machine is guided to these. .

  The first bearing front chamber 73 is provided in front of the first bearing 7 and is defined between the base 2 and the first bearing 7. The first bearing front chamber 73 communicates with the mother machine side through a gap 56 defined between the shaft 5 and the base 2, and hydraulic oil from the mother machine is guided. This gap 56 constitutes a base through passage 62 that communicates the mother machine with the first bearing front chamber 73.

  The base inner peripheral surface 26 may be increased in diameter so that contamination can be accumulated in the base through passage 62.

  The plunger front chamber 74 is defined between the first bearing 7 and the plunger front end surface 47.

  The first bearing 7 is interposed between the first bearing front chamber 73 and the plunger front chamber 74. The first bearing 7 does not have a flow path penetrating the first bearing 7 and functions to block communication between the first bearing front chamber 73 and the plunger front chamber 74.

  The plunger back chamber 75 is defined between the end surface 48 of the plunger 4 and the second bearing 8.

  The plunger 4 is interposed between the plunger front chamber 74 and the plunger back chamber 75. In order to prevent the magnetic adsorption between the sleeve 3 and the plunger 4, an annular gap 55 is defined around the plunger outer peripheral surface 41. The annular gap 55 constitutes a plunger outer circumferential path 63 that communicates the plunger front chamber 74 and the plunger back chamber 75.

  A plurality of grooves 42 are formed in the plunger outer peripheral surface 41 as the plunger outer peripheral path 63. The hydraulic oil is configured to flow between the plunger front chamber 74 and the plunger back chamber 75 through the grooves 42.

  By defining the plunger outer circumferential path 63 by the plurality of grooves 42, the clearance of the gap 55 can be reduced. By reducing the clearance of the gap 55, the magnetic efficiency for driving the plunger 4 can be increased.

  The second bearing back chamber 76 is provided behind the second bearing 8, and is defined between the second bearing 8 and the bottom surface 93 of the case 9.

  The second bearing 8 is interposed between the plunger back chamber 75 and the second bearing back chamber 76. A plurality of grooves 82 are formed on the outer peripheral surface 81 of the second bearing 8. These grooves 82 constitute a second bearing through passage 64 that allows the plunger back chamber 75 and the second bearing back chamber 76 to communicate with each other.

  A vertical through hole 53 that penetrates the shaft 5 in the direction of the center line O and a horizontal through hole 54 that penetrates the shaft 5 in the radial direction perpendicular to the center line O are formed. The vertical through hole 53 and the horizontal through hole 54 constitute a shaft through path 65 that communicates the mother machine with the second bearing rear chamber 76.

  By connecting a hydraulic valve (not shown) of the mother machine to an end 52 protruding from the base 2 of the shaft 5, the open end of the vertical through hole 53 is closed. In that case, the shaft end passage 65 is prevented from being blocked by the open end of the lateral through hole 54 communicating with the mother machine.

  Next, the operation of the embodiment of the present invention configured as described above will be described.

  When the solenoid 1 is assembled to the mother machine and the hydraulic oil (not shown) of the mother machine is filled with hydraulic oil, the hydraulic oil from the mother machine is filled into the solenoid 1 through the following path.

  The hydraulic oil from the mother machine is filled into the first bearing front chamber 73 through the base through passage 62 (gap 56).

  The hydraulic oil from the mother machine is filled into the second bearing rear chamber 76 through the shaft through passage 65 (the horizontal through hole 54 and the vertical through hole 53).

  The hydraulic oil in the second bearing back chamber 76 is filled into the plunger back chamber 75 through the second bearing through passage 64 (groove 82).

  The hydraulic oil in the plunger back chamber 75 is filled into the plunger front chamber 74 through the plunger outer peripheral path 63 (gap 55, groove 42).

  The solenoid 1 drives the plunger 4 by the magnetic force of the coil 12, slides the shaft 5 coupled to the plunger 4 in the axial direction, and opens and closes the hydraulic valve of the mother machine.

  When the coil 12 is not energized, the shaft 5 is held at the initial position by the reaction force received from the hydraulic valve of the mother machine.

  When the coil 12 is energized, the plunger 4 is driven closer to the base 2 by the solenoid thrust generated by the magnetic field generated inside the coil 12, and the shaft 5 is slid forward (to the left in FIG. 2). Open and close the valve. FIG. 2 shows an operating state in which the shaft 5 is slid by a certain stroke from the initial position by the solenoid thrust.

  When the shaft 5 slides forward, the volume of hydraulic oil from which the shaft 5 retreats from the second bearing back chamber 76 flows into the second bearing back chamber 76 from the mother machine through the shaft through passage 65.

  At this time, when the plunger 4 moves forward, hydraulic oil corresponding to the moving volume of the plunger 4 flows from the plunger front chamber 74 that contracts into the plunger back chamber 75 that extends through the plunger outer circumferential path 63.

  When the coil 12 is de-energized, the shaft 5 slides backward (to the right in FIG. 2) by the reaction force received from the hydraulic valve of the mother machine, and opens and closes the hydraulic valve of the mother machine.

  When the shaft 5 slides backward, the volume of hydraulic oil that the shaft 5 enters from the second bearing back chamber 76 flows out from the second bearing back chamber 76 through the shaft through passage 65 to the mother machine.

  At this time, when the plunger 4 moves rearward, the hydraulic oil corresponding to the moving volume of the plunger 4 flows from the plunger back chamber 75 that contracts into the plunger front chamber 74 that extends through the plunger outer peripheral path 63.

  The first bearing 7 cuts off the communication between the first bearing front chamber 73 and the plunger front chamber 74, and the hydraulic fluid of the mother machine passes through the shaft through passage 65, the second bearing rear chamber 76, and the second bearing through passage 64 to move the plunger. It is configured to be guided to the back chamber 75. Thereby, the path | route in which the contamination mixed in the hydraulic fluid led from the mother machine reaches the strong magnetic field portion B around the plunger 4 is lengthened, and the contamination of the magnetic material (base 2 and plunger 4) constituting the strong magnetic field portion B It is possible to suppress adhesion and deposition on the surface. Thereby, the malfunction of the solenoid 1 resulting from the contamination of hydraulic oil can be prevented, and the movable time during which the solenoid 1 operates stably can be extended.

  Further, since the second bearing back chamber 76 expanded and contracted by sliding of the shaft 5 communicates with the plunger back chamber 75 via the second bearing through passage 64, pressure fluctuation from the mother machine is caused by the second bearing back chamber. Even when the pressure is transmitted to 76, the pressure fluctuation in the second bearing back chamber 76 is transmitted to the plunger back chamber 75 through the second bearing through passage 64, and the second bearing 8 is pressured in the second bearing back chamber 76 and the plunger back chamber 75. It can be prevented from falling off due to the difference.

  The plunger outer circumferential path 63 includes an annular gap 55 defined around the plunger outer circumferential surface 41 to prevent magnetic adsorption between the sleeve 3 and the plunger 4, and a plurality of grooves 42 opened in the plunger outer circumferential surface 41. Therefore, when the plunger 4 moves, the flow of the hydraulic oil around the plunger 4 is suppressed, the viscosity resistance of the hydraulic oil applied to the plunger 4 is reduced, and the operation responsiveness of the solenoid 1 is improved. Further, when the plunger 4 moves at a high speed, the contamination accumulated on the plunger 4 is removed. Thereby, the malfunctioning of the solenoid 1 resulting from the contamination of hydraulic fluid can be prevented.

  Since the plunger outer circumferential path 63 includes a plurality of grooves 42 formed on the plunger outer circumferential surface 41, the flow path cross-sectional area of the plunger outer circumferential path 63 is expanded by these grooves 42. Thereby, when the plunger 4 moves, the flow of the hydraulic oil around the plunger 4 is suppressed, the viscosity resistance of the hydraulic oil applied to the plunger 4 is reduced, and the operation responsiveness of the solenoid 1 is improved.

  As described above, in the present embodiment, the plunger 4 is driven by the magnetic field generated in the coil 12, the shaft 5 coupled to the plunger 4 is moved in the axial direction, and the solenoid 1 is driven to drive the mother machine. 12, a cylindrical case 9 that accommodates 12, a cylindrical base 2 that is disposed on the open end side of the case 9 inside the coil 12, and a base 2 that is disposed on the back side of the case 9 inside the coil 12. And a cylindrical sleeve 3 facing each other with a magnetic gap, and a magnetic circuit for guiding a magnetic field generated around the coil 12 to the plunger 4 by the case 9 made of a magnetic material, the base 2 and the sleeve 3 is configured to at least the case. 9, the base 2, and the sleeve 3 constitute a pressure vessel 90 that accommodates the plunger 4 and the shaft 5, and protrudes from the base 2 in the radial direction of the shaft 5. A base flange 66 and a case flange 91 projecting from the case 9 in the radial direction of the shaft 5, and the base flange 66 and the case flange 91 are overlapped with each other via a common bolt and fastened to the mounting seat of the mother machine. did.

  Based on the above configuration, the base flange 66 and the case flange 91 are overlapped with each other and fastened to the mounting seat of the mother machine, whereby the base 2 is fixed in the axial direction with respect to the case 9, and the case 9, the base 2 and the sleeve The working fluid pressure generated in the pressure vessel 90 constituted by 3 can be held. Accordingly, it is possible to prevent the hydraulic oil (working fluid) flowing into the pressure vessel 90 that accommodates the plunger 4 and the shaft 5 from the mother machine from leaking out of the solenoid 1 and to secure the pressure resistance of the solenoid 1.

  The bolts that overlap the base flange 66 and the case flange 91 and fasten each other also serve to fasten the solenoid 1 to the mounting seat of the mother machine. Peeled off.

  Next, another embodiment shown in FIG. 4 will be described. This has basically the same configuration as the embodiment of FIGS. 1 to 3, and only the differences will be described. In addition, the same code | symbol is attached | subjected to the same structure part as the said embodiment.

  The base flange 66 is formed separately from the base 2.

  A disc-shaped base flange 21 is integrally formed at one end of the base 2. The end surface 79 of the base flange 66 is assembled so as to contact the base flange 21.

  The inner peripheral surface 70 of the base flange 66 is fitted and fixed to the outer peripheral surface 25 of the base 2 by press fitting. The inner peripheral surface 70 of the base flange 66 and the outer peripheral surface 25 of the base 2 are in contact with each other without a gap, and a metal seal is formed by this contact portion.

  The base flange 66 may be fixed to the base 2 by caulking or welding.

  The pressure tube 17 has an axial length equal to that of the bobbin 11, and one end 17 a abuts against the back surface 67 of the base flange 66 without a gap, and the other end 17 b abuts against the bottom surface 93 of the case 9 without a gap. A metal seal is formed by these contact portions. As a result, the case 9, the base 2, the base flange 66, the sleeve 3, and the pressure tube 17 constitute a pressure vessel 90.

  The pressure tube 17 may be eliminated, and an O-ring may be interposed between the base 2, the sleeve 3, and the coil assembly 10, and the pressure vessel 90 may be configured by the case 9, the base 2, the sleeve 3, and the coil assembly 10. .

  A bolt hole 68 is opened in the base flange 66, and the bolt hole 68 communicates with a bolt hole 98 opened in the case flange 91.

  The base flange 66 and the case flange 91 are fastened to a mounting seat of a mother machine (not shown) by two bolts (not shown) that pass through the respective bolt holes 68 and 98. An end surface 79 of the base flange 66 abuts against the mounting seat of the mother machine.

  Thus, the base flange 66 and the case flange 91 are fastened to each other, whereby the base 2 is fixed in the axial direction with respect to the case 9, and the pressure vessel 90 configured by the case 9, the base 2, the pressure-resistant tube 17, and the sleeve 3. The working fluid pressure generated within can be maintained.

  In the present embodiment, the base flange 66 is formed separately from the base 2.

  Based on the above configuration, by changing the shape of the base flange 66 in accordance with the shape of the mounting seat of the mother machine, it is not necessary to change the shape of the base 2 and the processing cost can be reduced.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

  The solenoid of the present invention is useful for hydraulic equipment, pneumatic equipment, other machines and equipment.

The front view of the solenoid which shows embodiment of this invention. Sectional drawing of the solenoid which similarly follows the AOA line of FIG. The sectional view which expanded the plunger circumference similarly. Sectional drawing around the plunger showing another embodiment.

Explanation of symbols

1 Solenoid 2 Base 3 Sleeve 4 Plunger 5 Shaft 12 Coil 66 Base Flange 68 Bolt Hole 90 Pressure Vessel 91 Case Flange 98 Bolt Hole

Claims (3)

A solenoid that drives a mother machine by driving a plunger by a magnetic field generated in a coil, moving a shaft coupled to the plunger in an axial direction,
A cylindrical case for housing the coil;
A cylindrical base disposed on the open end side of the case inside the coil;
A cylindrical sleeve disposed on the back side of the case inside the coil and facing the base with a magnetic gap;
A magnetic circuit configured to guide a magnetic field generated around the coil to the plunger by the case made of a magnetic material, the base, and the sleeve;
A pressure vessel that houses the plunger and the shaft by at least the case, the base, and the sleeve;
Projecting from said base in a radial direction of the shaft, and a base flange formed by the base and integral,
A case flange protruding in the radial direction of the shaft from the case,
A solenoid characterized in that the base flange and the case flange are overlapped with each other via a common bolt and fastened to a mounting seat of the mother machine. A solenoid that drives a mother machine by driving a plunger by a magnetic field generated in a coil, moving a shaft coupled to the plunger in an axial direction,
A cylindrical case for housing the coil;
A cylindrical base disposed on the open end side of the case inside the coil;
A cylindrical sleeve disposed on the back side of the case inside the coil and facing the base with a magnetic gap;
A magnetic circuit configured to guide a magnetic field generated around the coil to the plunger by the case made of a magnetic material, the base, and the sleeve;
A pressure vessel that houses the plunger and the shaft by at least the case, the base, and the sleeve;
A base collar protruding from the base;
A base flange that is in contact with the base collar and fixed to the base;
A case flange protruding in the radial direction of the shaft from the case,
A solenoid characterized in that the base flange and the case flange are overlapped with each other via a common bolt and fastened to a mounting seat of the mother machine . A pressure-resistant tube fitted to the outer peripheral surface of the base and the outer peripheral surface of the sleeve;
The pressure tube is
One end abuts the base without any gap,
The solenoid according to claim 1 or 2, wherein the other end contacts the case without any gap.

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