JP2006057517A - Solenoid-driven valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solenoid-driven valve with a driving valve having stable reciprocating motion while reducing its energy loss. <P>SOLUTION: The solenoid-driven valve comprises the driving valve having a stem 12 for reciprocating motion along the extending direction of the stem 12, a disc support 51, a lower disc 20 having one end connected to the stem 12 and the other end rockingly supported on the disc support 51 for rocking around a center axis 25 extending from the other end, and a lower torsion bar 26 provided extending on the center axis 25 and fixed to the other end. The lower torsion bar 26 has a fixed portion 4 fixed to the disc support 51 with its adjustable phase angle to the disc support 51 around the center axis 25. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention generally relates to an electromagnetically driven valve, and more particularly to a rotationally driven electromagnetically driven valve that is used in an internal combustion engine and is driven by electromagnetic force and elastic force.

  Japanese Utility Model Laid-Open No. 61-200919 discloses a knock pin in which serrations are formed along the axial direction on the outer peripheral surface of a pin body (Patent Document 1). Japanese Utility Model Laid-Open No. 61-200920 discloses a knock pin in which an outer peripheral surface of a pin body is provided with an elastic body capable of being pressed against a wall surface of a driving hole (Patent Document 2).

Further, Japanese Utility Model Publication No. 14-20004 discloses a screw provided with a screw formed on the outer periphery thereof and having a notch portion in a part of the outer periphery, and a lock nut disposed on the outer periphery of the notch portion. A relaxation prevention device is disclosed (Patent Document 3). Further, Japanese Utility Model Publication No. 37-9013 has a bag-shaped female screw, a screw screwed into the female screw, and a dish-shaped head, which extends from the head of the female screw to the inner end of the screw. A locking screw including a locking screw screwed in the axial direction is disclosed (Patent Document 4).
Japanese Utility Model Publication No. 61-200919 Japanese Utility Model Publication No. 61-200920 Japanese Utility Model Publication No. 14-20004 Japanese Utility Model Publication No. 37-9013

  An electromagnetically driven valve called a rotary drive type has a stem and reciprocates between a valve opening position and a valve closing position, and swings on one end abutting on the tip of the stem and a disk support. A disk having the other end supported movably and an electromagnet for applying an electromagnetic force to the disk. The electromagnetically driven valve is further provided at the other end of the disk, and is disposed on the outer periphery of the stem and urges the drive valve toward the valve opening position, and urges the drive valve toward the valve closing position. And a spiral spring. Due to the elastic force of these springs and the electromagnetic force generated by supplying current to the electromagnet, the disk swings around the other end as a fulcrum. The movement of the disk is transmitted to the stem through one end, and the drive valve reciprocates.

  In such an electromagnetically driven valve, a torsion bar and a spiral spring are provided so that the disk is positioned at an intermediate position between the valve opening position and the valve closing position when no electromagnetic force is applied. Based on this assumption, the electromagnetic force for overcoming the spring force of these springs is calculated at each lift position of the drive valve, and the current supply to the electromagnet is controlled from the calculation result.

  However, in the torsion bar and the spiral spring, a shape error that cannot be avoided in the manufacturing process and an assembly error with respect to the disk support base and stem occur, and the disk may not be accurately set at the intermediate position. In this case, an error occurs in the spring load received by the drive valve at each lift position, and an accurate electromagnetic force for overcoming the spring load is not required. As a result, the movement of the drive valve becomes unstable, the seating speed (operating sound) increases, and the power is wasted by the electromagnet for correcting such an error.

  Accordingly, an object of the present invention is to solve the above-described problems, and to provide an electromagnetically driven valve that can stably reciprocate the drive valve and reduce energy loss.

  The electromagnetically driven valve according to the present invention is an electromagnetically driven valve that operates by cooperation of electromagnetic force and elastic force. The electromagnetically driven valve has a valve shaft and reciprocates along the direction in which the valve shaft extends, a support member provided at a position spaced from the drive valve, and one end connected to the valve shaft And a swing member that swings about an axis extending at the other end, and is provided to extend on the shaft and is fixed to the other end. And a torsion spring. The torsion spring is fixed to the support member, and has a fixing portion in which the phase angle around the axis with respect to the fixed support member can be adjusted.

  According to the electromagnetically driven valve configured as described above, by providing the fixing portion, the torsion spring can be attached to the support member while adjusting the phase angle around the axis extending at the other end, and can be fixed at that position. . As a result, the spring load acting on the swing member from the torsion spring can be accurately set to a value determined by design. In this case, there is no error between the spring load that acts on the swing member from the torsion spring and the spring load that is calculated by design during the actual swing of the swing member. For this reason, the drive valve can be stably reciprocated by applying an electromagnetic force obtained from the designed spring load to the swing member. Further, since it is not necessary to apply an electromagnetic force so as to eliminate the error of the spring load, it is possible to prevent wasteful power consumption by the electromagnetically driven valve.

  Preferably, a plurality of swing members are provided at a distance from each other in the direction in which the valve shaft extends. According to the electromagnetically driven valve configured as described above, the above-described effects can be obtained in the electromagnetically driven valve adopting the parallel link mechanism.

  Preferably, the fixing portion includes an outer peripheral surface of a torsion spring in which serrations are formed. The support member has an opening into which the fixing portion is inserted. A serration that meshes with the serration formed in the fixed portion is formed on the inner wall of the opening. According to the electromagnetically driven valve configured as described above, by shifting the engagement between the serration formed on the outer peripheral surface of the torsion spring and the serration formed on the inner wall of the opening, the torsion spring is rotated around the axis relative to the support member. Can be adjusted. Further, since the meshing between the serrations is strong, the torsion spring can be reliably fixed at the adjusted position.

  Preferably, the fixed portion includes an outer peripheral surface of a torsion spring formed on a tapered surface. The support member has an opening into which the fixing portion is inserted. A tapered surface is formed on the inner wall of the opening so as to be in pressure contact with the tapered surface formed on the fixed portion. According to the electromagnetically driven valve configured as described above, the phase angle around the axis of the torsion spring with respect to the support member can be arbitrarily adjusted by pushing the torsion spring into the opening while shifting the tapered surfaces. Further, since a wedge force is generated between the outer peripheral surface of the torsion spring and the inner wall of the opening, the torsion spring can be reliably fixed at the adjusted position. Further, since it is only necessary to form the outer peripheral surface of the torsion spring in a tapered shape, the shape can be easily obtained even when the torsion spring is inferior in workability.

  Preferably, the fixing portion includes an outer peripheral surface of a torsion spring in which a male screw is formed. The support member has an opening into which the fixing portion is inserted. On the inner wall of the opening, a female screw is formed in which a male screw formed on the fixed portion is screwed. A lock nut is tightened into the opening from the side opposite to the direction in which the fixing portion is inserted. According to the electromagnetically driven valve configured as described above, the phase angle around the axis of the torsion spring with respect to the support member can be arbitrarily adjusted by changing the angle at which the torsion spring is screwed into the opening. Further, it is possible to prevent the torsion spring from being loosened by the repulsive force generated between the lock nut and the torsion spring. For this reason, the torsion spring can be reliably fixed at the adjusted position.

  As described above, according to the present invention, it is possible to provide an electromagnetically driven valve in which the drive valve is stably reciprocated and energy loss is reduced.

  Embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 is a cross-sectional view showing an electromagnetically driven valve according to Embodiment 1 of the present invention. The electromagnetically driven valve in the present embodiment constitutes an engine valve (intake valve or exhaust valve) of an internal combustion engine such as a gasoline engine or a diesel engine. In this embodiment, the case where the electromagnetically driven valve constitutes an intake valve will be described, but the same structure is provided even when the exhaust valve is constituted.

  Referring to FIG. 1, an electromagnetically driven valve 10 is a rotationally driven electromagnetically driven valve, and a parallel link mechanism is applied to its motion mechanism.

  The electromagnetically driven valve 10 includes a drive valve 14 having a stem 12 extending in one direction, a lower disk 20 and an upper disk 30 which are coupled to different positions of the stem 12 and swing by an applied electromagnetic force and elastic force, and a stem. A disc support base 51 provided side by side with the stem 12 at a position distant from 12, an open / close electromagnet 60 (hereinafter also simply referred to as an electromagnet 60) provided on the disc support base 51 and generating electromagnetic force, A lower torsion bar 26 and an upper torsion bar 36 are provided on the disk 20 and the upper disk 30, respectively, and apply an elastic force to these disks. The driving valve 14 reciprocates in the direction in which the stem 12 extends (the direction indicated by the arrow 103) in response to the swinging motion of the lower disk 20 and the upper disk 30.

  The drive valve 14 is mounted on a cylinder head 41 in which an intake port 17 is formed. A valve seat 42 is provided at a position where the intake port 17 of the cylinder head 41 communicates with a combustion chamber (not shown). The drive valve 14 further has an umbrella portion 13 formed at the tip of the stem 12. As the driving valve 14 reciprocates, the umbrella portion 13 is brought into close contact with the valve seat 42 or detached from the valve seat 42, whereby the intake port 17 is opened and closed. That is, when the stem 12 is raised, the driving valve 14 is positioned to the valve closing position, and when the stem 12 is lowered, the driving valve 14 is positioned to the valve opening position.

  The stem 12 includes a lower stem 12m continuous from the umbrella portion 13 and an upper stem 12n connected to the lower stem 12m via a lash adjuster 16. The lash adjuster 16 functions as a buffer member between the upper stem 12n and the lower stem 12m, and has a characteristic that it is easily contracted and hardly stretched. The lash adjuster 16 absorbs the positioning error of the drive valve 14 in the valve closing position, and securely attaches the umbrella portion 13 to the valve seat 42. The lower stem 12m is formed with a connecting pin 12p protruding from its outer peripheral surface, and the upper stem 12n is formed with a connecting pin 12q protruding from its outer peripheral surface at a position away from the connecting pin 12p. .

  The cylinder head 41 is provided with a valve guide 43 for guiding the lower stem 12m so as to be slidable in the axial direction. The upper stem 12n can be slid in the axial direction at a position away from the valve guide 43. A stem guide 45 is provided for guiding as described above. The valve guide 43 and the stem guide 45 are made of, for example, a metal material such as stainless steel so as to withstand high-speed sliding with the stem 12.

  FIG. 2 is a perspective view showing the electromagnet in FIG. Referring to FIGS. 1 and 2, an electromagnet 60 is provided on the disk support base 51 so as to be positioned between the lower disk 20 and the upper disk 30. The electromagnet 60 includes an opening / closing coil 62 and an opening / closing core 61 having attracting surfaces 61a and 61b and made of a magnetic material. The open / close core 61 has a shaft portion 61p extending in a direction orthogonal to the direction in which the stem 12 extends. The open / close coil 62 is provided so as to turn around the shaft portion 61p, and is constituted by a monocoil (a coil composed of a continuous continuous line).

  The disk support 51 is further provided with a valve opening permanent magnet 55 and a valve closing permanent magnet 56 located on the opposite side of the valve opening permanent magnet 55 with the electromagnet 60 interposed therebetween. The valve-opening permanent magnet 55 has a suction surface 55a, and a space in which the lower disk 20 swings is defined between the suction surface 55a and the suction surface 61b of the electromagnet 60. The valve-closing permanent magnet 56 has an adsorption surface 56 a, and a space in which the upper disk 30 swings is defined between the adsorption surface 56 a and the adsorption surface 61 a of the electromagnet 60.

  FIG. 3 is a perspective view showing the lower disk (upper disk) in FIG. Referring to FIGS. 1 and 3, the lower disk 20 has one end 22 and the other end 23, and extends from the other end 23 toward the one end 22 in a direction crossing the stem 12. The lower disk 20 is formed with rectangular surfaces 21a and 21b, and is provided at an arm portion 21 extending between one end 22 and the other end 23 and at the other end 23, and has a hollow cylindrical shape. The bearing part 28 is comprised. The surfaces 21a and 21b face the adsorption surface 61b of the electromagnet 60 and the adsorption surface 55a of the valve opening permanent magnet 55, respectively.

  The arm portion 21 is formed with a notch 29 located on the one end 22 side. Long holes 24 are formed in the wall surfaces of the notch 29 facing each other. A center axis 25 extending in a direction orthogonal to the direction from the one end 22 toward the other end 23 is defined at the other end 23. A through hole 27 extending along the central axis 25 is formed in the bearing portion 28.

  The upper disk 30 has the same shape as the lower disk 20, and includes one end 22 and the other end 23 of the lower disk 20, an arm portion 21, a surface 21a, a surface 21b, a notch portion 29, a long hole 24, a bearing portion 28, Corresponding to the through hole 27 and the central axis 25, one end 32, the other end 33, the arm part 31, the surface 31 b, the surface 31 a, the notch part 39, the long hole 34, the bearing part 38, the through hole 37 and the central axis 35 Is formed. The surfaces 31a and 31b face the adsorption surface 61a of the electromagnet 60 and the adsorption surface 56a of the valve-closing permanent magnet 56, respectively. The lower disk 20 and the upper disk 30 are made of a magnetic material.

  One end 22 of the lower disk 20 is swingably connected to the lower stem 12m by inserting the connecting pin 12p through the long hole 24. One end 32 of the upper disk 30 is slidably connected to the upper stem 12n by inserting a connecting pin 12q into the elongated hole 34.

  4 is a perspective view of a cross section of the electromagnetically driven valve taken along line IV-IV in FIG. FIG. 5 is a cross-sectional view of the electromagnetically driven valve along the line VV in FIG. FIG. 6 is an end view of the lower torsion bar as seen from the arrow VI in FIG. Hereinafter, the structure of the lower torsion bar 26 and the mounting structure of the lower disk 20 will be described. The upper torsion bar 36 and the upper disk 30 also have the same structure.

  With reference to FIGS. 1 and 4 to 6, a lower torsion bar 26 is fixed to the other end 23 in a state of being inserted into the through hole 27. The lower torsion bar 26 is made of spring steel and has a shape extending in a rod shape along the central axis 25. The lower torsion bar 26 has a fixing portion 4 that is fixed to the disc support base 51 at one end of the extension bar 26. The lower torsion bar 26 is rotatably supported with respect to the disk support 51 on the side opposite to the side on which the fixing portion 4 is provided.

  On the outer peripheral surface 4a of the fixed portion 4, a serration is formed in which grooves extending in the axial direction are provided side by side in the circumferential direction. The number of grooves provided side by side in the circumferential direction on the outer peripheral surface 4a is, for example, 20, and may be other numbers. The disk support 51 is formed with an opening 52 into which the fixing portion 4 is inserted. On the inner wall of the opening 52, serrations that mesh with serrations formed on the outer peripheral surface 4a are formed.

  When the fixing portion 4 is inserted into the opening 52, the serrations formed on the outer peripheral surface 4a of the fixing portion 4 and the inner wall of the opening 52 mesh with each other, and the lower torsion bar 26 is fixed to the disc support base 51. . As a result, the other end 23 of the lower disk 20 is supported by the disk support 51 so as to be swingable about the central axis 25. In the same manner, the other end 33 of the upper disk 30 is supported by the disk support base 51 via the upper torsion bar 36 so as to be swingable about the central axis 35. The drive valve 14 can be reciprocated by swinging the lower disk 20 and the upper disk 30 about the central shafts 25 and 35, respectively.

  An elastic force is applied to the lower disk 20 by a lower torsion bar 26 that urges the lower disk 20 around the central axis 25 in the clockwise direction. An elastic force is applied to the upper disk 30 by the upper torsion bar 36 to bias it counterclockwise about the central axis 35. In the state where the electromagnetic force by the electromagnet 60 is not applied, the lower disk 20 and the upper disk 30 are moved by the elastic force of the lower torsion bar 26 and the upper torsion bar 36 from the swinging end on the valve opening side and the swinging end on the valve closing side. Is positioned at an intermediate position.

  In the present embodiment, the lower torsion bar 26 and the upper torsion bar 36 are connected to the disk while adjusting the position where the serration formed on the outer peripheral surface 4a of the fixed portion 4 meshes with the serration formed on the inner wall of the opening 52. It fixes with respect to the support stand 51. FIG. For example, when the lower disk 20 and the upper disk 30 are positioned closer to the swing end on the valve opening side from the above-mentioned intermediate position, the counterclockwise elastic force by the upper torsion bar 36 is reduced by the lower torsion bar. 26 overcomes the clockwise elastic force of 26. In this case, for example, in order to increase the elastic force by the lower torsion bar 26, the position where the serrations mesh with each other is adjusted so that the fixing portion 4 of the lower torsion bar 26 is shifted in the clockwise direction with respect to the opening 52. It ’s fine. Thus, the fixed portion 4 functions as a load balance adjusting mechanism for the lower torsion bar 26 and the upper torsion bar 36, and the fixed portion 4 allows the lower disk 20 and the upper disk 30 to be connected to the swing end on the valve opening side. It can be accurately positioned at an intermediate position from the swinging end on the valve closing side.

  FIG. 7 is a schematic diagram showing an upper disk and a lower disk at the swing end on the valve opening side. FIG. 8 is a schematic diagram showing the upper disk and the lower disk at the intermediate position. FIG. 9 is a schematic view showing an upper disk and a lower disk at the swing end on the valve closing side. Subsequently, the operation of the electromagnetically driven valve 10 will be described.

  Referring to FIG. 7, when the drive valve 14 is in the valve open position, the open / close coil 62 is supplied with a current flowing in the direction indicated by the arrow 111 around the shaft portion 61 p of the open / close core 61. At this time, on the side where the upper disk 30 is located, current flows from the back of the paper surface shown in FIG. As a result, a magnetic flux flows in the opening / closing core 61 in the direction indicated by the arrow 112, and an electromagnetic force that attracts the upper disk 30 to the attracting surface 61 a of the electromagnet 60 is generated. On the other hand, the lower disk 20 is attracted to the attracting surface 55 a by the valve-opening permanent magnet 55. As a result, the upper disk 30 and the lower disk 20 are held at the swing end on the valve opening side shown in FIG. 7 against the elastic force of the lower torsion bar 26 disposed around the central axis 25.

  Next, referring to FIG. 8, when the current supply to the open / close coil 62 is stopped, the electromagnetic force generated in the electromagnet 60 disappears. Accordingly, the upper disk 30 and the lower disk 20 are separated from the suction surfaces 61a and 55a by the elastic force of the lower torsion bar 26, and start to swing toward the intermediate position. The elastic force generated by the lower torsion bar 26 and the upper torsion bar 36 tends to hold the upper disk 30 and the lower disk 20 at an intermediate position. For this reason, at a position beyond the intermediate position, a force in a direction opposite to the swinging direction acts on the upper disk 30 and the lower disk 20 by the upper torsion bar 36. However, since an inertial force is applied to the upper disk 30 and the lower disk 20 along the direction of rocking, the upper disk 30 and the lower disk 20 are swung to a position beyond the intermediate position.

  Referring to FIG. 9, next, a current is passed again in the direction indicated by arrow 111 through switching / coil 62 at a position beyond the intermediate position. At this time, on the side where the lower disk 20 is located, an electric current flows from the front of the paper surface shown in FIG. As a result, a magnetic flux flows in the opening / closing core 61 in the direction indicated by the arrow 132, and an electromagnetic force is generated that draws the lower disk 20 to the attracting surface 61 b of the electromagnet 60. On the other hand, the upper disk 30 is attracted to the attracting surface 56 a by the valve-closing permanent magnet 56.

  At this time, the upper disk 30 is also attracted to the attracting surface 61 a of the electromagnet 60 by the electromagnetic force generated by the electromagnet 60. However, since the electromagnetic force acts more greatly between the lower disk 20 and the electromagnet 60 that are close to each other, the upper disk 30 and the lower disk 20 are closed from the position beyond the intermediate position as shown in FIG. Swing to the swing end on the side.

  Thereafter, the start and stop of the current supply to the open / close coil 62 are repeated at the timing described above. As a result, the upper disk 30 and the lower disk 20 are swung between the swinging ends on the valve opening side and the valve closing side, and the drive valve 14 can be reciprocated through this swinging motion.

  The electromagnetically driven valve 10 according to the first embodiment of the present invention is an electromagnetically driven valve that operates by cooperation of electromagnetic force and elastic force. The electromagnetically driven valve 10 has a stem 12 as a valve shaft, a drive valve 14 that reciprocates along the direction in which the stem 12 extends, and a disk as a support member provided at a position spaced apart from the drive valve 14. As a shaft having a support base 51, one ends 22 and 32 connected to the stem 12, and the other ends 23 and 33 swingably supported by the disk support base 51 and extending at the other ends 23 and 33. As a torsion spring provided to extend on the central shafts 25 and 35 and fixed to the other ends 23 and 33 as a lower disk 20 and an upper disk 30 as swinging members swinging about the central shafts 25 and 35. The lower torsion bar 26 and the upper torsion bar 36 are provided. The lower torsion bar 26 and the upper torsion bar 36 are fixed to the disc support base 51 and have a fixing portion 4 that can adjust the phase angle around the central axes 25 and 35 with respect to the fixed disc support base 51.

  The fixing portion 4 includes an outer peripheral surface 4a of the lower torsion bar 26 and the upper torsion bar 36 in which serrations are formed. The disk support base 51 has an opening 52 into which the fixing part 4 is inserted. A serration that meshes with the serration formed in the fixed portion 4 is formed on the inner wall of the opening 52.

  In the present embodiment, the load balance adjustment mechanism by the fixing portion 4 is provided on both the lower disk 20 and the upper disk 30, but it may be provided only on either one. However, when both the lower disk 20 and the upper disk 30 are provided, the load capable of balancing the lower torsion bar 26 and the upper torsion bar 36 can be easily changed. For this reason, the elastic force acting on the lower disk 20 and the upper disk 30 during swinging can be freely adjusted.

  According to the electromagnetically driven valve 10 according to the first embodiment of the present invention configured as described above, the electromagnetic force by the electromagnet 60 is not applied by providing the fixing portion 4 on the lower torsion bar 26 and the upper torsion bar 36. In this state, the lower disk 20 and the upper disk 30 can be accurately positioned at an intermediate position between the swing ends on the valve opening side and the valve closing side.

  FIG. 10 is a graph showing the relationship between the lift amount of the drive valve and the resultant force of the upper torsion bar and the lower torsion bar. Referring to FIG. 10, in the figure, the resultant force of upper torsion bar 36 and lower torsion bar 26 is represented on the vertical axis with the direction in which drive valve 14 is urged upward being positive. The relationship between the two set in the design, that is, the relationship when the lower disk 20 and the upper disk 30 are accurately positioned at the intermediate position in a state where the electromagnetic force by the electromagnet 60 is not acting, This is indicated by the straight line 76. Further, the relationship between the lower disk 20 and the upper disk 30 when they are positioned closer to the valve opening side from the intermediate position is indicated by a straight line 78 in the drawing, and the positioning is performed closer to the valve closing side from the intermediate position. The relationship between the two is shown by a straight line 77 in the figure.

  As can be seen by comparing the straight lines 76 to 78, when the lower disk 20 and the upper disk 30 are set at positions shifted from the intermediate position, a balance point where the elastic forces of the two torsion bars balance is indicated by an arrow in the figure. In the range indicated by 79, the design balance point P deviates. In this case, the resultant force of the two torsion bars received by the drive valve 14 at each lift position varies within a range indicated by an arrow 80 in the figure, for example, and the resultant force set by design, that is, the resultant force represented by the straight line 76. An error occurs between However, in the present embodiment, such an error does not occur because the lower disk 20 and the upper disk 30 are accurately positioned at the intermediate positions of the swinging ends on the valve opening side and the valve closing side. For this reason, the electromagnetic force calculated from the designed resultant force is applied to the lower disk 20 and the upper disk 30, and the drive valve 14 can be stably reciprocated.

(Embodiment 2)
FIG. 11 is a sectional view showing an electromagnetically driven valve according to Embodiment 2 of the present invention. In the figure, a range similar to the range shown in FIG. 5 is shown. The electromagnetically driven valve in the present embodiment basically has the same structure as that of the electromagnetically driven valve 10 in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

  With reference to FIG. 11, in this Embodiment, the outer peripheral surface 4a of the fixing | fixed part 4 is formed in the taper surface. That is, the outer peripheral surface 4 a extends with an inclination with respect to the central axis 25 and is formed by a side surface of the truncated cone formed along the central axis 25. A tapered surface is formed on the inner wall of the opening 52 so as to come into surface contact with the outer peripheral surface 4 a in a state where the lower torsion bar 26 is inserted into the opening 52. A hexagonal hole 84 is formed in the fixed portion 4 from the end face 4 c side of the fixed portion 4.

  The disk support base 51 is further formed with a female screw hole 81 that opens from the side surface 51 c and continues to the opening 52. A nut 82 is tightened in the female screw hole 81 with a tightening force P. The nut 82 is formed with a hexagonal hole 83 penetrating along the central axis 25. The hexagonal hole 83 is formed larger than the hexagonal hole 84. When the end surface 4 c of the fixed portion 4 is pressed by the nut 82, the tapered surface formed on the outer peripheral surface 4 a is pressed against the tapered surface formed on the inner wall of the opening 52. At this time, if the angle formed by the central axis 25 and the ridgeline of the outer peripheral surface 4a is θ (in this case, the taper angle of the outer peripheral surface 4a is 2θ), the fixed portion 4 with respect to the opening 52 having a size of P / tan θ. The fastening force N is generated.

  In the present embodiment, the lower torsion bar 26 is fixed to the disc support base 51 using a special hexagon wrench having a through-hole formed in the axial direction and a normal hexagon wrench. More specifically, the nut 82 is lightly tightened with the fixing portion 4 inserted into the opening 52. Next, while fitting the front-end | tip of the above-mentioned special hexagon wrench in the hexagon hole 83, a normal hexagon wrench is fitted in the hexagon hole 84 through the through-hole formed in the special hexagon wrench. In this state, the lower torsion bar 26 is positioned at an optimum phase angle while turning a normal hexagon wrench, and the lower torsion bar 26 is fixed at that position by turning a special hexagon wrench.

  In the electromagnetically driven valve according to Embodiment 2 of the present invention, fixed portion 4 includes outer peripheral surface 4a of lower torsion bar 26 formed in a tapered surface. The disk support base 51 has an opening 52 into which the fixing part 4 is inserted. A tapered surface is formed on the inner wall of the opening 52 so as to be in pressure contact with the tapered surface formed on the fixed portion 4.

  A female screw hole 81 that continues to the opening 52 is formed in the disk support base 51. A nut 82 as a pressing member that presses the end surface 4 c of the fixing portion 4 and presses the outer peripheral surface 4 a and the tapered surfaces formed on the inner wall of the opening 52 is tightened into the female screw hole 81. A hexagon hole 84 as a first tool insertion hole into which a hexagon wrench as a tool for rotating the fixing portion 4 around the rotation axis 25 is inserted is formed in the fixing portion 4 from the end face 4c side. The nut 82 is formed with a hexagonal hole 83 as a second tool insertion hole into which the hexagonal hole 84 is exposed and a special hexagon wrench as a tool for tightening the nut 82 is inserted.

  FIG. 12 is a cross-sectional view showing a modification of the electromagnetically driven valve in FIG. Referring to FIG. 12, in this modification, a plate 71 joined to the end surface 4c of the fixing portion 4 is provided instead of the nut 82 in FIG. The plate 71 extends in a bowl shape from the end surface 4c to the side surface 51c of the disk support base 51. The plate 71 extends in the circumferential direction about the central axis 25 at a position extending to the side surface 51c. An elongated hole 71h is formed. The plate 71 is fastened to the disc support 51 by bolts 72 inserted through the long holes 71h. In this modification, the lower torsion bar 26 is fixed at an optimum phase angle by tightening the bolt 72 while rotating the plate 71.

  Although only the lower torsion bar 26 has been described in the present embodiment, it is only necessary that at least one of the lower torsion bar 26 and the upper torsion bar 36 be provided with the fixing portion 4 described above.

  According to the electromagnetically driven valve according to the second embodiment of the present invention configured as described above, the same effects as those described in the first embodiment can be obtained. In addition, in the present embodiment, since the load balance adjustment mechanism by the fixed portion 4 is configured by contact between the tapered surfaces, the lower torsion bar 26 is positioned at an arbitrary phase angle around the central axis 25. Can do. Thereby, load balance adjustment with a higher degree of freedom becomes possible. Moreover, since a large fastening force can be generated by the wedge effect, loosening of the lower torsion bar 26 with respect to the opening 52 can be prevented.

(Embodiment 3)
13 is a sectional view showing an electromagnetically driven valve according to Embodiment 3 of the present invention. In the figure, a range similar to the range shown in FIG. 5 is shown. The electromagnetically driven valve in the present embodiment basically has the same structure as that of the electromagnetically driven valve 10 in the first embodiment. Hereinafter, the description of the overlapping structure will not be repeated.

  Referring to FIG. 13, in the present embodiment, a male screw is formed on outer peripheral surface 4 a of fixing portion 4. A hexagon hole 88 is formed in the fixed portion 4 from the end face 4 c side of the fixed portion 4. On the other hand, the internal wall of the opening 52 is formed with a female screw into which a male screw formed on the outer peripheral surface 4a is screwed. A lock nut 86 is tightened into the opening 52 from the side opposite to the fixed portion 4, and the end surface 4 c of the fixed portion 4 is pressed by the end surface 86 c of the lock nut 86 facing the end surface 4 c. The lock nut 86 is formed with a hole 87 that penetrates in the direction in which the central shaft 25 extends.

  FIG. 14 is a cross-sectional view showing a process of performing load balance adjustment with the electromagnetically driven valve in FIG. 13. Referring to FIG. 14, in the present embodiment, first, fixing portion 4 is in a state of being tightened into opening 52. Referring to FIG. 13, next, the lock nut 86 is lightly tightened from the opposite side, and a hexagon wrench is fitted into the hexagon hole 88 through the hole 87. In this state, while rotating the hexagon wrench, the lower torsion bar 26 is positioned at an optimum phase angle, and the lock nut 86 is further tightened to fix the lower torsion bar 26 at that position.

  In the electromagnetically driven valve according to Embodiment 3 of the present invention, fixed portion 4 includes outer peripheral surface 4a of lower torsion bar 26 in which a male screw is formed. The disk support base 51 has an opening 52 into which the fixing part 4 is inserted. On the inner wall of the opening 52, a female screw into which a male screw formed on the fixed portion 4 is screwed is formed. A lock nut 86 is tightened into the opening 52 from the side opposite to the direction in which the fixing portion 4 is inserted.

  A hexagon hole 88 as a tool insertion hole into which a hexagon wrench as a tool for rotating the fixing portion 4 around the rotation shaft 25 is inserted is formed in the fixing portion 4 from the end face 4c side. The lock nut 86 is formed with a hole 87 through which the hexagonal hole 88 is exposed.

  Although only the lower torsion bar 26 has been described in the present embodiment, it is only necessary that at least one of the lower torsion bar 26 and the upper torsion bar 36 be provided with the fixing portion 4 described above.

  According to the electromagnetically driven valve according to the third embodiment of the present invention configured as described above, the same effects as those described in the first embodiment can be obtained. In addition, in the present embodiment, since the load balance adjusting mechanism by the fixing portion 4 is configured by a screw structure, the lower torsion bar 26 can be positioned at an arbitrary phase angle around the central axis 25. Thereby, load balance adjustment with a higher degree of freedom becomes possible.

  In the first to third embodiments, the case where the parallel link mechanism is employed for the rotationally driven electromagnetically driven valve has been described, but the present invention is not limited to this. One disk having one end connected to the stem 12 and the other end swingably supported by the disk support base 51, and a disk disposed above and below the disk, and alternately applying electromagnetic force to the disk The present invention can be applied to an electromagnetically driven valve including a plurality of electromagnets in the same manner as in the first to third embodiments.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is sectional drawing which shows the electromagnetically driven valve in Embodiment 1 of this invention. It is a perspective view which shows the electromagnet in FIG. FIG. 2 is a perspective view showing a lower disk (upper disk) in FIG. 1. It is a perspective view of the cross section of the electromagnetically driven valve along the IV-IV line in FIG. It is sectional drawing of the electromagnetically driven valve along the VV line in FIG. FIG. 6 is an end view of the lower torsion bar as seen from an arrow VI in FIG. 5. It is a schematic diagram showing an upper disk and a lower disk at the swing end on the valve opening side. It is a schematic diagram which shows the upper disk and lower disk in an intermediate position. It is a schematic diagram which shows the upper disk and lower disk in the rocking | fluctuation end by the side of a valve closing. It is a graph which shows the relationship between the lift amount of a drive valve, and the resultant force of an upper torsion bar and a lower torsion bar. It is sectional drawing which shows the electromagnetically driven valve in Embodiment 2 of this invention. It is sectional drawing which shows the modification of the electromagnetically driven valve in FIG. It is sectional drawing which shows the electromagnetically driven valve in Embodiment 3 of this invention. It is sectional drawing which shows the process of implementing load balance adjustment with the electromagnetically driven valve in FIG.

Explanation of symbols

  4 fixed part, 4a outer peripheral surface, 10 electromagnetically driven valve, 12 stem, 14 driven valve, 20 lower disk, 22, 32 one end, 23, 33 other end, 25, 35 central axis, 26 lower torsion bar, 30 upper disk , 36 Upper torsion bar, 51 Disc support, 52 opening, 86 Lock nut.

Claims (5)

An electromagnetically driven valve that operates in cooperation with electromagnetic force and elastic force,
A drive valve having a valve shaft and reciprocating along a direction in which the valve shaft extends;
A support member provided at a position spaced apart from the drive valve;
A swing member having one end connected to the valve shaft and the other end swingably supported by the support member, and swinging about an axis extending at the other end;
A torsion spring provided to extend on the shaft and fixed to the other end;
The torsion spring is an electromagnetically driven valve that is fixed to the support member and includes a fixing portion that can adjust a phase angle around the axis with respect to the fixed support member.   The electromagnetically driven valve according to claim 1, wherein a plurality of the swinging members are provided at a distance from each other in a direction in which the valve shaft extends. The fixing portion includes an outer peripheral surface of the torsion spring formed with serrations,
The support member has an opening into which the fixing portion is inserted,
3. The electromagnetically driven valve according to claim 1, wherein serrations that mesh with serrations formed in the fixed portion are formed on an inner wall of the opening. 4. The fixing portion includes an outer peripheral surface of the torsion spring formed on a tapered surface,
The support member has an opening into which the fixing portion is inserted,
4. The electromagnetically driven valve according to claim 1, wherein a tapered surface that is pressed against a tapered surface formed in the fixed portion is formed on the inner wall of the opening. 5. The fixing portion includes an outer peripheral surface of the torsion spring in which a male screw is formed,
The support member has an opening into which the fixing portion is inserted,
The inner wall of the opening is formed with a female screw into which a male screw formed on the fixing portion is screwed. A lock nut is tightened on the opening from the side opposite to the direction in which the fixing portion is inserted. The electromagnetically driven valve according to claim 1, wherein the electromagnetically driven valve is embedded.

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