WO2021038773A1 - プッシュプルソレノイド - Google Patents

プッシュプルソレノイド Download PDF

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Publication number
WO2021038773A1
WO2021038773A1 PCT/JP2019/033805 JP2019033805W WO2021038773A1 WO 2021038773 A1 WO2021038773 A1 WO 2021038773A1 JP 2019033805 W JP2019033805 W JP 2019033805W WO 2021038773 A1 WO2021038773 A1 WO 2021038773A1
Authority
WO
WIPO (PCT)
Prior art keywords
plunger
case
axial direction
push
guide member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/033805
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
小林　優
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harmonic Drive Systems Inc
Original Assignee
Harmonic Drive Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harmonic Drive Systems Inc filed Critical Harmonic Drive Systems Inc
Priority to EP19943501.7A priority Critical patent/EP4024417A4/en
Priority to CN201980099454.XA priority patent/CN114258577B/zh
Priority to JP2021541885A priority patent/JP7111443B2/ja
Priority to PCT/JP2019/033805 priority patent/WO2021038773A1/ja
Priority to US17/619,497 priority patent/US12009149B2/en
Priority to KR1020227000662A priority patent/KR102587317B1/ko
Publication of WO2021038773A1 publication Critical patent/WO2021038773A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1623—Armatures having T-form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H01F2007/086—Structural details of the armature

Definitions

  • the present invention relates to a push-pull solenoid, and more particularly to a push-pull solenoid that is not provided with a return mechanism such as a return spring that applies a force in the direction opposite to the suction direction to the plunger to return it to its original position.
  • a return mechanism such as a return spring that applies a force in the direction opposite to the suction direction to the plunger to return it to its original position.
  • the push-pull solenoid is described in Patent Documents 1 and 2, for example.
  • the plunger at the initial position (return position) away from one end face of the case is attracted by magnetic force to the side of the fixed iron core arranged in the case and pulled into the pull-in position. ..
  • the shaft coaxially connected to the plunger is extruded from the opposite case end face.
  • the shaft is used to push out an object to be operated.
  • the plunger that slides to the retracted position does not have a return mechanism such as a return spring, so that it returns to a free state that can freely slide at that position.
  • an acceleration load is applied to the shaft in the free state from the side of the object to be operated in the direction of pushing back the shaft, and the shaft and the plunger are placed in the initial position (return position). Pushed back to the side of. At this time, the plunger may be excessively pushed back to a position beyond the original initial position (return position) by inertial force (excessive return). Further, when the plunger is held in a posture in which gravity is applied in the axial direction, the weight of the shaft and the plunger is added to the inertial force due to the load applied from the operation object, so that the shaft and the plunger may fall out of the case. There is also.
  • a push-pull solenoid equipped with a return spring is known as a return mechanism for the plunger.
  • a compression coil spring is arranged as a return spring between the end face of the case and the tip of the plunger protruding from the end face.
  • both ends of the return spring are connected to the plunger side and the case side, respectively, the plunger cannot be accurately positioned at the return position and the suction position, the suction force is reduced, and the impact contact with the object is made. Etc. will occur.
  • the return spring is attached, the shaft length of the solenoid is increased by that amount, and the stroke of the plunger is shortened by the contact length of the return spring.
  • an object of the present invention is to suppress impact contact with an operating object during suction of the plunger, vibration and noise caused by the impact, and to prevent excessive return and dropout of the plunger after suction is released.
  • the purpose is to provide a push-pull solenoid with a simple mechanism.
  • the push-pull solenoid of the present invention With the case A base made of magnetic material fixed to the case, A plunger made of a magnetic material that protrudes in a slidable state in the axial direction from one end face of the case in the axial direction of the case. A coil that generates a magnetic attraction force to slide the plunger in the axial direction from the return position away from the case end face toward the pull-in direction approaching the case end face.
  • the guide member attached to the case and Is equipped with The guide member is characterized by having a friction guide surface that guides the plunger in the axial direction with a predetermined frictional force.
  • the plunger when the plunger slides in the axial direction, it slides along the friction guide surface of the guide member.
  • a predetermined frictional force acts on the plunger that slides along the friction guide surface in the direction opposite to the sliding direction.
  • the plunger whose suction is released by turning off the power does not become a free state that can slide in the axial direction, and the sliding in the axial direction is restrained by the frictional force.
  • a tubular member that coaxially surrounds the plunger protruding from the end face of the case can be used as the guide member.
  • the inner peripheral surface of the tubular member may be used as the friction guide surface.
  • the plunger may be formed with an outer peripheral surface that slides in the axial direction along the inner peripheral surface of the tubular member.
  • (A) and (b) are explanatory views which show the main structure of the push-pull solenoid to which this invention is applied.
  • (A) and (b) are graphs showing the relationship between the slide position of the plunger and the force acting on the plunger.
  • (A1) to (a4) are explanatory views showing four types of cylindrical guide members having different axial cross-sectional shapes, and (b) is a slide of a plunger when the guide members of each shape are used. It is a graph which shows the relationship between a position and a frictional force.
  • (A) to (e) are explanatory views showing each example of a cylindrical guide member.
  • the push-pull solenoid 1 (hereinafter, may be simply referred to as "solenoid 1") is a case 2 made of a magnetic material, a base 3 which is a fixed iron core made of a magnetic material, and a movable iron core made of a magnetic material. It includes a plunger 4 and a coil 5. A shaft 6 made of a non-magnetic material is coaxially connected and fixed to the plunger 4.
  • FIG. 1 (b) shows that the plunger 4 is pulled toward the case end surface 21 from the initial position (return position) 4A shown in FIG. 1 (a) protruding from one case end surface 21 of the case 2 by the magnetic attraction force. It is sucked toward the pull-in position 4B shown in.
  • the shaft 6 that slides integrally with the plunger 4 has one shaft end 61 protruding from the tip surface of the plunger 4 in the axial direction 1a.
  • the shaft 6 extends through the central shaft hole 31 of the base 3 in a slidable state.
  • the other shaft end 62 of the shaft 6 projects outward from the other case end face 22 of the case 2 through the central shaft hole 31 of the base 3.
  • the shaft 6 When the plunger 4 is in the initial position (return position) 4A, the shaft 6 is in the retracted position 6A in which the shaft end portion 62 is pulled toward the case end face 22.
  • the shaft 6 When the plunger 4 is sucked into the pull-in position 4B, the shaft 6 also slides in the same direction, and the shaft end 62 slides to the extrusion position 6B extruded from the case end face 22.
  • the operating object W in contact with the shaft operating end 63 which is the tip of the shaft end 62, is pushed out in the axial direction 1a by a predetermined distance.
  • the operation target W of this example has a predetermined spring rigidity in the axial direction 1a.
  • the plunger 4 projecting from the case end surface 21 in the case 2 has a small-diameter cylindrical portion 41 extending through the circular opening 23 of the case end surface 21 in a slidable state, and a cylindrical portion 41 projecting out of the case. It is provided with a large-diameter disk-shaped plunger head 42 formed at the tip of the.
  • the outer peripheral surface of the plunger head 42 is a circular outer peripheral surface 43 having a constant width.
  • a guide member 7 that guides the slide of the plunger 4 is attached to the side of the case end surface 21 in the case 2.
  • the guide member 7 of this example is a cylindrical member made of a non-magnetic material.
  • the guide member 7 coaxially surrounds the portion of the plunger 4 protruding from the case end surface 21.
  • the circular inner peripheral surface of the guide member 7 is a case-side fixing portion 71 in which one end thereof is coaxially adhered and fixed to the outer peripheral surface of the case 2.
  • the remaining inner peripheral surface portion of the circular inner peripheral surface is a friction guide surface 72 that guides the circular outer peripheral surface 43 of the plunger 4 in the axial direction 1a with a predetermined frictional force.
  • the guide member 7 is preferably formed of a gel material, an elastomer material, or a plastic material so as to generate a small frictional force suitable for practical use.
  • 2A and 2B are graphs showing the relationship between the slide position (stroke) of the plunger 4 and the force applied to the plunger 4 when the solenoid 1 is on and off.
  • the solenoid 1 is at the initial position (return position) 4A where the plunger 4 protrudes from the case end face 21. It is assumed that the shaft operating end 63 of the shaft 6 is in contact with the operating object W having the spring rigidity from the axial direction 1a.
  • the curve A shows the magnitude of the magnetic force generated between the base 3 and the plunger 4.
  • the magnetic force increases as the plunger 4 approaches the base 3.
  • the straight line B1 indicates the frictional force generated between the plunger 4 and the guide member 7.
  • the frictional force has a constant magnitude regardless of the slide position of the plunger 4, and acts in the return direction opposite to the suction direction of the plunger.
  • the external force applied to the shaft 6 from the operation target object W having the spring rigidity is assumed to increase according to the pushing amount as shown by the straight line C.
  • the operating force of the plunger 4 in the suction direction is represented by the curve D.
  • the solenoid 1 is turned off and the energization of the coil 5 is stopped.
  • the plunger 4 is opened, and the plunger 4 is pushed back from the pull-in position 4B toward the initial position (return position) 4A by an external force from the side of the operating object W acting on the shaft 6.
  • the frictional force generated between the plunger 4 and the guide member 7 is a constant value as shown in the straight line B2 and acts in the suction direction of the plunger.
  • the external force decreases as the plunger 4 approaches the return position, as shown by the straight line C.
  • the plunger 4 can be stopped at the initial position (return position). Can be done. As a result, it is possible to prevent excessive return in which the plunger 4 is pushed back to a position beyond the initial position (return position) by an external force. Further, it is possible to prevent the plunger 4 from falling out of the case 2. Further, since the plunger 4 can be returned to the initial position (return position) with high accuracy, the plunger 4 can be sucked toward the pull-in position with an appropriate suction force at the next energization.
  • the guide member 7 of this example is a cylindrical member having a constant thickness, and the inner diameter dimension of the circular inner peripheral surface thereof is constant at each position in the axial direction 1a. As a result, the frictional force generated at each slide position of the plunger 4 is constant.
  • the inner diameter, thickness, and tightening allowance of the cylindrical guide member 7 may be designed so that the required frictional force can be obtained. In particular, the frictional force greatly changes depending on the cross-sectional shape of the cylindrical guide member 7 in the axial direction.
  • FIG. 3B is a graph showing the relationship between the slide position of the plunger 4 and the frictional force when the guide members of each shape are used.
  • the straight line C in FIG. 3B shows the reaction force from the outside as in the case of FIG.
  • the cylindrical guide member 17 shown in FIG. 3A1 is the same as the guide member 7 shown in FIG. 1, has the same cross-sectional shape in the axial direction, and has the same inner diameter of the friction guide surface 17a. Is. In this case, as shown by line a1 in FIG. 3B, the frictional force acting on the plunger 4 is substantially constant.
  • the cylindrical guide member 27 shown in FIG. 3A2 moves from the position 7A where the plunger 4 at the initial position (return position) contacts to the position 7B where the plunger 4 at the retracting position contacts along the axial direction. It has a trapezoidal cross-sectional shape with the same outer diameter and a gradually decreasing inner diameter.
  • the frictional force due to the friction guide surface 27a increases linearly from the position 7A to the position 7B along the axial direction as shown by the line a2 in FIG. 3B.
  • the cylindrical guide member 37 shown in FIG. 3A has a cross-sectional shape in which both the outer diameter and the inner diameter gradually increase from the position 7A to the position 7B along the axial direction. As shown by the line a3 in FIG. 3B, the frictional force due to the friction guide surface 37a increases linearly with a large inclination from the position 7A to the position 7B along the axial direction.
  • 3A4 has a cross-sectional shape in which the outer diameter is constant and the inner diameter gradually decreases in a curved shape from the position 7A to the position 7B along the axial direction.
  • the frictional force of the curved friction guide surface 47a increases in a curved shape from the position 7A to the position 7B along the axial direction as shown by the line a4 in FIG. 3B. To do.
  • the cross-sectional shape of the cylindrical member By changing the cross-sectional shape of the cylindrical member in this way, the required frictional force can be obtained.
  • FIG. 4 is an explanatory view showing still another example of the cylindrical guide member.
  • the guide member 170 shown in FIG. 4A is formed by bending a cylindrical portion 171 having a friction guide surface 175 formed of a circular inner peripheral surface and a cylindrical portion 171 at a right angle inward in the radial direction from one open end. It is provided with an annular flange 172.
  • the annular end surface 173 of the annular flange 172 is a case-side fixing portion that is adhesively fixed to the case end surface of the case 2.
  • a cylindrical body 271 and an annular flange 273 protruding inward in the radial direction are integrated at a position close to one opening end 272 in the axial direction on the circular inner peripheral surface thereof. It is formed.
  • the circular inner peripheral surface between the other open end 274 and the annular flange 273 of the cylindrical body 271 is the friction guide surface 275.
  • the annular flange 273 is located between the plunger 4 and the case 2 in the axial direction, and functions as an air gap spacer for reducing the influence of residual magnetism when the plunger 4 returns to the initial position (return position).
  • the annular end surface of the annular flange 273 facing the side of the case 2 and the circular inner peripheral surface of the cylinder are case-side fixing portions 276 that are adhesively fixed to the case side.
  • the guide member 370 shown in FIG. 4C has a configuration in which a large-diameter cylindrical body 372 is coaxially integrally formed with a small-diameter cylindrical body 371.
  • the circular inner peripheral surface of the small-diameter cylindrical body 371 is a friction guide surface 373.
  • the circular inner peripheral surface of the large-diameter cylindrical body 372 and the annular end surface between the cylindrical bodies are case-side fixing portions 374 that are adhesively fixed to the case side.
  • the guide member 470 shown in FIG. 4D has a configuration in which an annular flange 472 is coaxially integrally formed at the end of the cylindrical body 471.
  • the circular inner peripheral surface of the cylindrical body 471 is a friction guide surface 473.
  • the annular flange 472 extends radially outward and inward from the cylindrical body 471, and its annular end face is a case-side fixing portion 474 that is adhesively fixed to the case end face of the case.
  • the guide member 570 shown in FIG. 4 (e) includes a small-diameter cylindrical body 571, a large-diameter cylindrical body 572 coaxially integrally formed at the end thereof, and an annular flange 573 formed between them.
  • the circular inner peripheral surface of the small-diameter cylindrical body 571 is a friction guide surface 574.
  • the annular flange 573 projects inward in the radial direction from the circular inner peripheral surface of the small-diameter cylindrical body 571, and functions as an air gap spacer.
  • the circular inner peripheral surface of the large-diameter cylindrical body 572 and the annular end surface of the annular flange 573 are case-side fixing portions 575 that are adhesively fixed to the side of the case 2.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electromagnets (AREA)
PCT/JP2019/033805 2019-08-28 2019-08-28 プッシュプルソレノイド Ceased WO2021038773A1 (ja)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP19943501.7A EP4024417A4 (en) 2019-08-28 2019-08-28 PUSH-PULL SOLENOID
CN201980099454.XA CN114258577B (zh) 2019-08-28 2019-08-28 推拉式螺线管
JP2021541885A JP7111443B2 (ja) 2019-08-28 2019-08-28 プッシュプルソレノイド
PCT/JP2019/033805 WO2021038773A1 (ja) 2019-08-28 2019-08-28 プッシュプルソレノイド
US17/619,497 US12009149B2 (en) 2019-08-28 2019-08-28 Push-pull solenoid
KR1020227000662A KR102587317B1 (ko) 2019-08-28 2019-08-28 푸시풀 솔레노이드

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2019/033805 WO2021038773A1 (ja) 2019-08-28 2019-08-28 プッシュプルソレノイド

Publications (1)

Publication Number Publication Date
WO2021038773A1 true WO2021038773A1 (ja) 2021-03-04

Family

ID=74683945

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2019/033805 Ceased WO2021038773A1 (ja) 2019-08-28 2019-08-28 プッシュプルソレノイド

Country Status (6)

Country Link
US (1) US12009149B2 (https=)
EP (1) EP4024417A4 (https=)
JP (1) JP7111443B2 (https=)
KR (1) KR102587317B1 (https=)
CN (1) CN114258577B (https=)
WO (1) WO2021038773A1 (https=)

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS63273306A (ja) 1987-04-30 1988-11-10 Nec Corp プツシユプルソレノイド
JPH0298607A (ja) 1988-10-05 1990-04-11 Ricoh Co Ltd シート長測定装置
JP2006105264A (ja) * 2004-10-05 2006-04-20 Matsushita Electric Ind Co Ltd 遮断弁
WO2012032594A1 (ja) * 2010-09-06 2012-03-15 トヨタ自動車株式会社 電磁式リニア弁
WO2013065179A1 (ja) * 2011-11-04 2013-05-10 トヨタ自動車株式会社 電磁式リニア弁

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Publication number Priority date Publication date Assignee Title
JPS63273306A (ja) 1987-04-30 1988-11-10 Nec Corp プツシユプルソレノイド
JPH0298607A (ja) 1988-10-05 1990-04-11 Ricoh Co Ltd シート長測定装置
JP2006105264A (ja) * 2004-10-05 2006-04-20 Matsushita Electric Ind Co Ltd 遮断弁
WO2012032594A1 (ja) * 2010-09-06 2012-03-15 トヨタ自動車株式会社 電磁式リニア弁
WO2013065179A1 (ja) * 2011-11-04 2013-05-10 トヨタ自動車株式会社 電磁式リニア弁

Also Published As

Publication number Publication date
JP7111443B2 (ja) 2022-08-02
CN114258577B (zh) 2024-06-18
EP4024417A4 (en) 2023-05-10
KR20220017498A (ko) 2022-02-11
JPWO2021038773A1 (https=) 2021-03-04
KR102587317B1 (ko) 2023-10-10
EP4024417A1 (en) 2022-07-06
US12009149B2 (en) 2024-06-11
CN114258577A (zh) 2022-03-29
US20220375670A1 (en) 2022-11-24

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