JP6120638B2 - Electric on-off valve - Google Patents

Description

  The present invention relates to an electric on-off valve that switches a fluid flow state by opening and closing a valve body under an energizing action on a drive unit.

  The present applicant has proposed an electric on-off valve that can switch the flow state of fluid by opening and closing the valve body through a shaft under the driving action of a motor (see Patent Document 1). This on-off valve is used in, for example, a fuel cell system, a motor as a drive source, a gear mechanism meshed with a gear provided on a drive shaft of the motor, a shaft connected to the gear mechanism, and the shaft A disc-shaped valve body provided at an end of the valve body, and a spring that biases the valve body in order to maintain the valve open or closed state. When the motor is energized, the gear mechanism rotates in a predetermined direction along with the rotation of the drive shaft, and the valve body rotates along with the shaft. The passage is closed, and on the other hand, the valve element is rotated by the spring force of the spring by stopping energization of the motor, thereby switching to the valve open state in which the flow path communicates.

JP 2004-185880 A

  In such an electric on-off valve, for example, when the valve body is kept open, the drive unit is in a non-energized state and does not consume power because the thrust of a spring or the like is used. However, when the valve closed state is maintained, the driving force is generated and maintained by continuously energizing the driving unit. In recent years, from the viewpoint of energy saving, there is a demand for further reducing the power consumption used in the drive unit of the electric on-off valve as described above.

  The present invention has been made in connection with the above-described proposal, and an object thereof is to provide an electric on-off valve that can reliably maintain the open / close state of the valve body while further reducing power consumption. To do.

In order to achieve the above object, the present invention provides an electric on-off valve that switches a communication state of a flow path by opening and closing a valve body supported by a valve shaft.
A body in which the flow path is formed;
A drive unit that rotates under energization and opens and closes the valve body;
A biasing member that biases the valve body in a direction opposite to the biasing direction of the driving force of the driving unit;
A lock provided on the opposite side of the drive unit across the valve body, and holds the valve body in a fully closed or fully open position against the biasing force of the biasing member when the drive unit is not energized Mechanism,
With
The lock mechanism includes a rotor having a stepped portion on an outer peripheral surface and connected coaxially with the valve shaft, and an engaging portion engaged with the stepped portion. A pressing member that presses toward the step, and the rotor has an enlarged diameter portion that is enlarged toward the stepped portion, the stepped portion is provided adjacent to the enlarged diameter portion, and the pressing The member includes the engaging portion, the lever provided rotatably with respect to the outer peripheral surface side of the rotor, and the engagement portion to rotate toward the outer peripheral surface side. And a spring for urging the lever, wherein the engaging portion is composed of a rotating roller rotatably provided on the lever .

  According to the present invention, in the electric on-off valve that opens and closes the valve body by rotating the drive unit under energization action, while holding either one of the fully closed state or the fully open state of the valve body by the urging force of the urging member, A lock mechanism is provided on the opposite side of the drive unit with the valve body interposed therebetween. The locking mechanism includes a rotor that is coaxially connected to a valve shaft supported by a valve body and has a stepped portion formed on an outer peripheral surface thereof, and a pressing member having an engaging portion that is engaged with the stepped portion. In a non-energized state in which energization to the drive unit is stopped by engaging the engagement portion with the stepped portion when the engagement portion is pressed toward the rotor side, It is held in either the fully open state or the fully closed state.

  Accordingly, either the fully closed or fully opened state of the valve body can be held by the urging force of the urging member, while the fully open or fully closed state opposite to the above can be held by the lock mechanism. Compared with the electric open / close valve of the prior art in which the fully closed state is maintained by force, it is possible to eliminate the power consumption used for maintaining the fully closed or fully opened state of the valve body. As a result, it is possible to significantly reduce power consumption in the drive unit, and the fully open or fully closed state of the valve body can be reliably held by the biasing member and the lock mechanism.

  Further, by providing a lock mechanism on the opposite side of the drive unit across the valve body, only the lock mechanism can be added without changing the configuration of the drive unit, regardless of the presence or absence of the lock mechanism. Since the drive unit can be shared, manufacturing costs can be reduced.

  Furthermore, it is only necessary to increase the driving force of the driving unit only when the engaging part of the pressing member gets over the diameter-enlarged part of the rotor, and in the other normal operating range, the driving force at the time of getting over is increased. On the other hand, since the output can be suppressed, the power consumption in the normal operation range can be reduced.

Furthermore, the present invention provides an electric on-off valve that switches the communication state of the flow path by opening and closing the valve body supported by the valve shaft.
A body in which the flow path is formed;
A drive unit that rotates under energization and opens and closes the valve body;
A biasing member that biases the valve body in a direction opposite to the biasing direction of the driving force of the driving unit;
A lock provided on the opposite side of the drive unit across the valve body, and holds the valve body in a fully closed or fully open position against the biasing force of the biasing member when the drive unit is not energized Mechanism,
With
The lock mechanism includes a rotor having a stepped portion on an outer peripheral surface and connected coaxially with the valve shaft, and an engaging portion engaged with the stepped portion. A pressing member that presses toward the step, and the rotor has a diameter-expanded portion that is expanded toward the stepped portion, the stepped portion is provided adjacent to the diameter-expanded portion, and the drive It has a stopper which regulates rotation to the rotor side of the lever within the operation range of the part. Thereby, even when the engaging portion of the lever is pressed against the rotor, the rotating roller rotates under the contact action, thereby reducing the mutual contact resistance and allowing the lever to rotate smoothly. Wear at the contact portion is suppressed, and as a result, durability can be improved.

  Furthermore, since a stopper for restricting the rotation of the lever to the rotor side within the operating range of the drive unit is provided, it is possible to prevent a load from being applied from the lever to the rotor within the operating range of the drive unit. A load on the drive unit connected to the is prevented, and an increase in power consumption is prevented.

  Further, by providing the lock mechanism so as to be detachable from the body, the lock mechanism can be selectively attached or detached easily as needed.

  Furthermore, the electric on-off valve is used in the fuel cell system, and when the operation of the fuel cell is stopped, the flow of the reaction gas to the fuel cell stack is blocked by the lock mechanism when the valve body is completely closed. This is effective because the fuel cell stack can be prevented from deteriorating without consuming electric power.

  According to the present invention, the following effects can be obtained.

  That is, a lock capable of holding the valve body in the fully closed or fully opened position against the biasing force of the biasing member at a position opposite to the drive section across the valve body when the drive section is not energized. By providing a mechanism, either the fully closed or fully opened state of the valve body is held by the urging force of the urging member, while either the fully open or fully closed state opposite to the above is held by the lock mechanism. Compared with the electric on-off valve according to the prior art that holds the fully closed state by the driving force of the drive unit because it can hold, the power consumption used to hold the valve body in the fully closed or fully open state is reduced. Can do. As a result, it is possible to significantly reduce the power consumption of the electric on-off valve, and it is possible to reliably hold the fully open or fully closed state of the valve body by the urging member and the lock mechanism.

1 is an overall cross-sectional view of an electric on-off valve according to an embodiment of the present invention. It is an expanded sectional view which shows the lock mechanism vicinity in the electrically operated on-off valve of FIG. 3A is a plan view showing the locking mechanism of FIG. 2, and FIG. 3B is a cross-sectional view taken along line IIIB-IIIB of FIG. 3A. 4A to 4D are operation explanatory views of the rotor and the lock lever in the lock mechanism, FIG. 4A is a diagram illustrating an unlocked state when the valve body is in a fully opened state, and FIGS. 4B and 4C are diagrams. FIG. 4D is a diagram illustrating a state in which the rotor of 4A starts to rotate and the lock lever begins to rotate, and FIG. 4D is a diagram illustrating a locked state in which the valve body is fully closed and rotation of the rotor is restricted by the lock lever. It is.

  Preferred embodiments of the electric on-off valve according to the present invention will be described below and described in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 10 indicates an electric on-off valve according to an embodiment of the present invention.

  The electric on-off valve 10 is used, for example, in a fuel cell system, and is connected to a pipe through which hydrogen or oxygen as a reaction gas flows. As shown in FIG. 1, this electric on-off valve 10 is a valve having a body 12, a drive unit 14 housed in the body 12, and a valve body 18 that opens and closes a flow path 16 of the body 12. It includes a mechanism unit 20, a gear mechanism 22 that transmits the driving force of the driving unit 14 to the valve mechanism unit 20, and a lock mechanism 24 that maintains the open / closed state of the valve mechanism unit 20. Here, the normally open type electrically operated on / off valve 10 in which the valve body 18 is fully opened when the drive unit 14 is not energized and the upstream side and the downstream side of the flow path 16 sandwiching the valve body 18 are in communication with each other. explain.

  The body 12 is connected to the above-described piping, and a flow path 16 through which a fluid (for example, a reaction gas) flows is formed. In the flow path 16, a valve body 18 constituting the valve mechanism unit 20 is provided. A valve shaft 36 for opening and closing 18 is inserted through a shaft hole 26 penetrating in the vertical direction of the body 12. The body 12 is formed with a bottomed cylindrical storage chamber 28 substantially parallel to the shaft hole 26, and the drive unit 14 is stored in the storage chamber 28.

  The drive unit 14 includes, for example, a rotary drive source 30 such as a stepping motor or a DC servo motor, and is provided in the storage chamber 28 of the body 12 so that the drive shaft 32 of the rotary drive source 30 is on the upper side. A pinion gear 34 is attached to the drive shaft 32 and meshed with the first gear 40 of the gear mechanism 22 that is pivotally supported on the upper portion of the body 12.

  The valve mechanism 20 includes a disc-shaped valve body 18 and a valve shaft 36 to which the valve body 18 is connected. The valve body 18 is formed in a circular shape having substantially the same cross section as the flow path 16. The screw shaft 37 is fastened to a substantially central portion of the valve shaft 36. One end portion of the valve shaft 36 protrudes downward from the body 12 via the shaft hole 26 and is connected to a lock mechanism 24 described later, and the other end portion protrudes above the body 12 via the shaft hole 26, and the gear mechanism 22. Is mounted.

  The valve shaft 36 is rotatably supported by a pair of first bearings 38 provided so as to face the shaft hole 26.

  The gear mechanism 22 includes a first gear 40 that is pivotally supported on the upper portion of the body 12, and a second gear 42 that is coupled to the other end of the valve shaft 36, and the large-diameter gear portion of the first gear 40. 44 is meshed with the pinion gear 34 of the rotational drive source 30, and the small-diameter gear portion 46 is meshed with the second gear 42. Then, the driving force of the rotational drive source 30 is transmitted from the drive shaft 32 to the first gear 40 through the pinion gear 34, and is transmitted to the second gear 42 through the small diameter gear portion 46, thereby being decelerated. By being transmitted to the valve shaft 36, the valve shaft 36 and the valve body 18 rotate by a predetermined angle.

  Further, a return spring (biasing force) having a resilient force (biasing force) for biasing the valve shaft 36 in a predetermined rotation direction via the second gear 42 between the second gear 42 and the body 12. Member) 48 is interposed. The return spring 48 is formed of, for example, a spiral coil spring, and is biased in the direction in which the valve body 18 of the valve mechanism 20 opens (under the arrow B1 direction in FIG. 3A) under its elastic action. Is done.

  The lock mechanism 24 includes a housing 50 connected to the body 12, a rotor 52 rotatably provided in the housing 50, a lock lever (lever) 54 that rotates under the rotating action of the rotor 52, and the lock And a torque spring (spring) 56 that urges the lever 54. In the present embodiment, the lock lever 54 and the torque spring 56 correspond to the pressing member of the present invention.

  The housing 50 has a cover member 62 provided at the lower end of the body 12 in the present embodiment, and the rotor 52 and the lock lever 54 are accommodated in a space formed inside the cover member 62.

  The rotor 52 includes a cam portion 64 and first and second shaft portions 66 and 68 projecting axially from both end faces of the cam portion 64, and the first and second shaft portions 66 and 68 are valve valves. It is provided so as to be coaxial with the valve shaft 36 of the mechanism unit 20.

  The cam portion 64 includes a circular portion 70 that is concentric with the first and second shaft portions 66 and 68, and a nose portion (expanded diameter portion) 72 that protrudes radially outward from the circular portion 70. Further, the nose portion 72 includes a stepped portion 74 that is notched on one side with respect to a center line L (see FIG. 3A) passing through the center of the nose portion 72 and the center of the circular portion 70. The stepped portion 74 is formed in a substantially L-shaped cross section including a side surface along the center line L and a side surface orthogonal to the center line L. In other words, the cam portion 64 is formed in a shape in which a part of the nose portion 72 is recessed in the radially inward direction.

  The first shaft portion 66 is inserted into a hole 76 formed in the cover member 62 and is rotatably supported. On the other hand, the end portion of the second shaft portion 68 is formed with a convex portion 78 that protrudes in a direction away from the first shaft portion 66 and extends in a direction orthogonal to the axial direction of the second shaft portion 68. The shaft 36 is inserted into and engaged with a recess 80 formed at one end of the shaft 36. As a result, the relative rotational displacement between the valve shaft 36 and the second shaft portion 68 is restricted, and the rotor 52 rotates integrally with the cover member 62 under the rotational action of the valve shaft 36. It becomes.

  The lock lever 54 is a rotating body that is formed in a cylindrical shape with a bottom and is rotatably provided via a rod 84 that is pivotally supported via a second bearing 82. A nut 86 is provided at the end of the rod 84. And a rotating roller (engagement portion) 90 is pivotally supported at the tip of an arm 88 projecting radially outward from the outer peripheral surface thereof. The rotating roller 90 is composed of, for example, a ball bearing or a cam follower.

  The lock lever 54 is provided at a predetermined distance from the rotor 52 (see FIG. 3A), and is provided so that the axis of the rotor 52 and the rod 84 are substantially parallel (see FIG. 3B).

  The torque spring 56 is formed of, for example, a spiral coil spring, and is disposed between the lock lever 54 and the housing 50 and substantially coaxial with the rod 84. Then, one end portion of the torque spring 56 is held by a holding portion 92 protruding from the outer peripheral surface of the lock lever 54. As a result, the lock lever 54 is biased with a rotational force in a predetermined rotational direction (in the direction of arrow A1 in FIG. 3A, counterclockwise) under the resilient action of the torque spring 56, and the lock lever 54 The rotating roller 90 is always in contact with the outer peripheral surface of the cam portion 64.

  Further, a stopper 94 (see FIG. 3A) parallel to the rod 84 is provided in the vicinity of the lock lever 54, and the stopper 94 is configured so that the lock lever 54 is elastic in the rotational operation range of the drive unit 14. Further displacement by rotation in the counterclockwise direction (arrow A1 direction) is restricted.

  The electric on-off valve 10 according to the embodiment of the present invention is basically configured as described above. Next, the operation and effects thereof will be described. As shown in FIGS. 1 and 3A, the valve body 18 is in the valve open state, and the fully open state in which the flow path 16 on the upstream side and the flow path 16 on the downstream side of the valve body 18 communicate with each other is an initial state. explain.

  In this initial state, the drive unit 14 is not energized from a controller (not shown), and the valve body 18 is rotated via the valve shaft 36 by the elastic force of the return spring 48, so that the valve body 18 Is disposed substantially parallel to the extending direction of the flow path 16 (see FIG. 3A), and the rotor 52 of the lock mechanism 24 rotates clockwise (in the direction of the arrow B1) together with the valve shaft 36 as shown in FIG. 3A. In this state, the roller of the lock lever 54 is detached from the stepped portion 74 and is in contact with the outer peripheral surface of the circular portion 70. Since the fully opened state of the valve body 18 is held by the elastic force of the return spring 48, no electric power is consumed.

  Next, when the valve body 18 is rotated so that the communication state of the flow path 16 is blocked, a control signal is input to the drive unit 14 based on a control signal from a controller (not shown). As a result, the drive shaft 32 rotates in a predetermined direction. Along with this rotation, the driving force is transmitted from the pinion gear 34 to the valve shaft 36 via the gear mechanism 22, and the valve shaft 36 rotates by a predetermined angle against the elastic force of the return spring 48 (FIG. 3A). Middle, arrow B2 direction). As a result, the valve body 18 that rotates together with the valve shaft 36 rotates in the flow path 16, and is in a fully closed state in which communication between the upstream side and the downstream side of the flow path 16 is blocked by being orthogonal to the flow path 16. It becomes.

  In this case, in the lock mechanism 24, the rotor 52 starts to rotate counterclockwise (in the direction of arrow B <b> 2) with the rotation of the valve shaft 36. The lock lever 54 rotates clockwise (in the direction of arrow A2) against the resilience of the torque spring 56.

  Specifically, the rotation roller 90 of the lock lever 54 gradually moves from the outer peripheral surface of the circular portion 70 that is in contact with the valve body 18 in the fully open state to the outer peripheral surface of the nose portion 72 as the rotor 52 rotates. To do. As a result, the lock lever 54 starts to be pressed counterclockwise (in the direction of arrow A2) via the rotating roller 90 by the outer peripheral surface in which the separation distance from the second shaft portion 68 of the rotor 52 gradually increases. Further, when it is pressed by the top portion 96 of the nose portion 72, it further rotates counterclockwise (arrow A2 direction).

  Then, after the rotating roller 90 gets over the tip of the nose portion 72 under the further rotating action of the rotor 52, that is, after the valve body 18 is rotated about 90 ° from the fully closed state to the fully closed state, the rotation is performed. The roller 90 is engaged with the stepped portion 74. As shown in FIG. 4D, the stepped portion 74 is formed with a depth slightly smaller than the radius of the rotating roller 90, and the outer peripheral surface of the rotating roller 90 has two wall surfaces in the stepped portion 74. Abuts near the end. As a result, the elastic force of the torque spring 56 applied to the stepped portion 74 via the rotating roller 90 exceeds the driving force of the rotor 52, so that the rotor is moved by the lock lever 54 including the rotating roller 90. A locked state is established in which the clockwise rotation of 52 (in the direction of arrow B1) is restricted. At the same time, the lock lever 54 also stops further rotation counterclockwise (in the direction of the arrow A1) under the action of engagement with the stepped portion 74. The depth of the stepped portion 74 may be set as appropriate according to the resilience of the torque spring 56 and the like.

  Thereby, the rotor 52 is in a locked state in which the rotation operation is restricted by the rotation roller 90 of the lock lever 54 being engaged with the stepped portion 74 in the fully closed state where the valve body 18 closes the flow path 16. In this locked state, the elastic force of the torque spring 56 urged by the lock lever 54 is urged to the rotor 52 via the arm 88 and the rotating roller 90, so that the locked state is securely and firmly held. As a result, even when the energization of the drive unit 14 is stopped after the valve body 18 is fully closed, the valve mechanism 18 is kept in the fully closed state by the lock mechanism 24 and consumes power. Therefore, it can greatly contribute to the reduction of power consumption.

  On the other hand, when the valve body 18 is rotated again to be fully opened, a control signal having a polarity opposite to that when the valve is closed is output from the controller (not shown) to the drive unit 14. Along with this, the rotational drive source 30 is rotated in the opposite direction, and the valve body 18 starts to rotate in the valve opening direction together with the valve shaft 36 by the driving force transmitted to the valve shaft 36 via the gear mechanism 22 and the rotor. 52 begins to rotate clockwise (in the direction of arrow B1). At this time, the driving force applied to the valve shaft 36 and the rotor 52 is made larger than the elastic force of the torque spring 56 that urges the lock lever 54, thereby overcoming the elastic force and rotating the rotor 52. start.

  As the rotor 52 rotates, as shown in FIG. 4C, the top portion 96 of the nose portion 72 moves toward the rotating roller 90, and the rotating roller 90 is pushed up by the top portion 96 to be stepped. It separates from the portion 74 and rotates clockwise (in the direction of arrow A2) against the resilient force of the torque spring 56.

  Next, when the rotating roller 90 is detached from the stepped portion 74 and the rotor 52 further rotates and the rotating roller 90 reaches the outer peripheral surface of the nose portion 72 (see FIG. 4B), the drive unit 14 is energized. To stop. As a result, the lock lever 54 starts to rotate counterclockwise (in the direction of the arrow A1) by the elastic force of the torque spring 56 in a state where the rotating roller 90 is in contact with the outer peripheral surface of the rotor 52. The outer peripheral surface of 52 is pressed by the rotating roller 90 and the arm 88, and the rotor 52 rotates clockwise (in the direction of arrow B1) by the elastic force of the return spring 48 biased by the valve shaft 36.

  As a result, under the rotating action of the rotor 52, the valve body 18 rotates together with the valve shaft 36 to a position where the valve body 18 is fully opened and stops, and the fully open state is held by the elastic force of the return spring 48.

  Next, a case where the above-described lock mechanism 24 is attached to and detached from the body 12 will be briefly described.

  First, when removing the lock mechanism 24 connected to the lower end of the body 12, the housing 50 is fixed, for example, by removing a bolt or the like and moving it in a direction away from the body 12, The housing 50, the rotor 52 housed in the housing 50, and the lock lever 54 can be integrally removed from the body 12. That is, when the lock mechanism 24 is not required, the electric on-off valve 10 can be used as a single unit.

  Next, when the lock mechanism 24 is mounted on the electric opening / closing valve 10 described above, the housing 50 is moved to the electric opening / closing valve in a state where the rotor 52 and the lock lever 54 are previously installed at predetermined positions in the housing 50. 10, the second shaft portion 68 of the rotor 52 and the valve shaft 36 are aligned, and the convex portion 78 of the second shaft portion 68 is inserted into the concave portion 80 of the valve shaft 36. To engage. For example, by fixing the housing 50 to the lower end portion of the body 12 via a bolt or the like, the valve shaft 36 and the rotor 52 are connected to each other without relatively rotating.

  As described above, the lock mechanism 24 is detachably provided on the lower end portion of the body 12, and the convex portion 78 of the rotor 52 and the concave portion 80 of the valve shaft 36 are engaged with each other so that they can be easily connected. The lock mechanism 24 can be selectively attached or removed as necessary. In this case, the body 12 and the drive unit 14 of the electric on-off valve 10 need not be replaced and can be shared, so that the lock mechanism 24 can be retrofitted at a low cost.

  In the above description, the convex portion 78 is provided on the second shaft portion 68 of the rotor 52, and the concave portion 80 with which the convex portion 78 is engaged is formed at the end portion of the valve shaft 36. For example, the convex portion 78 may be provided on the valve shaft 36 side and the concave portion 80 may be provided on the rotor 52 side.

  As described above, in the present embodiment, in the electric on-off valve 10 that rotates the valve body 18 by energizing the drive unit 14, the fully open state of the valve body 18 is determined by the elastic force of the return spring 48. On the other hand, since the fully closed state of the valve body 18 can be held only by the lock mechanism 24, the electric opening and closing according to the related art in which the driving unit 14 is kept energized by continuously energizing the drive unit 14. Since power consumption in the fully closed state can be eliminated as compared with the valve, power consumption can be greatly reduced.

  In other words, the fully closed state of the valve body 18 can be mechanically held by the lock mechanism 24 without using electric power.

  For example, in the fuel cell system in which the electric opening / closing valve 10 is used, it is necessary to prevent the self-power generation by interrupting the flow of the reaction gas to the fuel cell stack when the operation of the fuel cell is stopped. Even in this case, since the shutoff state (fully closed state) of the flow path 16 by the valve body 18 can be maintained by the lock mechanism 24 without consuming electric power, it is possible to prevent deterioration of the fuel cell stack without consuming electric power. Is.

  Further, when releasing the locked state of the opening / closing operation of the valve body 18 by the lock mechanism 24, a driving force exceeding the resilience of the torque spring 56 is applied to the rotor 52, so that only the driving force can be used. In addition, the locked state in which the rotation of the valve body 18 and the valve shaft 36 is restricted can be reliably released.

  Further, by freely setting the position and quantity of the stepped portion 74 of the rotor 52, when the valve body 18 and the valve shaft 36 are rotated at less than 360 °, only when the valve body 18 is fully closed as described above. The rotational state of the valve body 18 and the valve shaft 36 can be regulated and locked at any position.

  Furthermore, since the lock lever 54 is provided with a rotating roller 90 that is in sliding contact with the outer peripheral surface of the rotor 52, even when the lock lever 54 is pressed under the rotating action of the rotor 52, the mutual contact resistance is reduced. As a result, the lock lever 54 can be smoothly rotated, and wear at the contact portion is suppressed. As a result, durability can be improved.

  Furthermore, since the holding force (locking force) by the lock lever 54 that restricts the rotation of the rotor 52 is set by the elastic force of the torque spring 56, for example, it is replaced with another torque spring 56 having a different elastic force. Thus, it can be easily used as a lock mechanism having lock levers having different holding forces.

  Further, since the lock mechanism 24 is disposed on the opposite side of the drive unit 14 with the valve mechanism unit 20 including the valve body 18 interposed therebetween, the configuration of the drive unit 14 is changed even when the lock mechanism 24 is retrofitted. It is possible to cope with only the locking mechanism 24 without doing so. Therefore, in the electric on-off valve 10, the drive unit 14 can be shared regardless of the presence or absence of the lock mechanism 24, so that the manufacturing cost can be reduced.

  Further, when the rotor 52 is rotated under the drive action of the drive unit 14, the drive force of the drive unit 14 is increased only when the rotation roller 90 of the lock lever 54 passes over the nose portion 72 of the rotor 52 and rotates. Therefore, in the other normal operating range of the drive unit 14, the output can be suppressed with respect to the driving force at the time of getting over, so that the power consumption in the normal operating range can be reduced.

  Furthermore, since the lock mechanism 24 has a simple configuration of the rotor 52 connected to the valve shaft 36 and the lock lever 54 that restricts the rotational operation of the rotor 52, the lock mechanism 24 can be reduced in size. Since it can be suitably mounted on the lower end portion and can be locked under the engaging action of the stepped portion 74 of the rotor 52 and the rotating roller 90 of the lock lever 54, there is no need for highly accurate processing or the like. It can be formed at low cost.

  Furthermore, the depth of the stepped portion 74 may be appropriately set according to the resilience of the torque spring 56 and the like.

  The electric on-off valve according to the present invention is not limited to the above-described embodiment, and it is needless to say that various configurations can be adopted without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Electric on-off valve 12 ... Body 14 ... Drive part 16 ... Flow path 18 ... Valve body 20 ... Valve mechanism part 22 ... Gear mechanism 24 ... Lock mechanism 36 ... Valve shaft 48 ... Return spring 50 ... Housing 52 ... Rotor 54 ... Lock Lever 56 ... Torque spring 64 ... Cam part 72 ... Nose part 74 ... Stepped part 78 ... Convex part 80 ... Concave part 88 ... Arm 90 ... Rotating roller 94 ... Stopper 96 ... Top part

Claims (4)

In the electric on-off valve that switches the communication state of the flow path by opening and closing the valve body supported by the valve shaft,
A body in which the flow path is formed;
A drive unit that rotates under energization and opens and closes the valve body;
A biasing member that biases the valve body in a direction opposite to the biasing direction of the driving force of the driving unit;
A lock provided on the opposite side of the drive unit across the valve body, and holds the valve body in a fully closed or fully open position against the biasing force of the biasing member when the drive unit is not energized Mechanism,
With
The lock mechanism includes a rotor having a stepped portion on an outer peripheral surface and connected coaxially with the valve shaft, and an engaging portion engaged with the stepped portion. A pressing member that presses toward the step, and the rotor has an enlarged diameter portion that is enlarged toward the stepped portion, the stepped portion is provided adjacent to the enlarged diameter portion, and the pressing The member includes the engaging portion, the lever provided rotatably with respect to the outer peripheral surface side of the rotor, and the engagement portion to rotate toward the outer peripheral surface side. And a spring for urging the lever, wherein the engaging portion comprises a rotating roller rotatably provided on the lever . In the electric on-off valve that switches the communication state of the flow path by opening and closing the valve body supported by the valve shaft,
A body in which the flow path is formed;
A drive unit that rotates under energization and opens and closes the valve body;
A biasing member that biases the valve body in a direction opposite to the biasing direction of the driving force of the driving unit;
A lock provided on the opposite side of the drive unit across the valve body, and holds the valve body in a fully closed or fully open position against the biasing force of the biasing member when the drive unit is not energized Mechanism,
With
The lock mechanism includes a rotor having a stepped portion on an outer peripheral surface and connected coaxially with the valve shaft, and an engaging portion engaged with the stepped portion. A pressing member that presses toward the step, and the rotor has a diameter-expanded portion that is expanded toward the stepped portion, the stepped portion is provided adjacent to the diameter-expanded portion, and the drive An electrically operated on-off valve having a stopper for restricting the rotation of the lever toward the rotor within the operating range of the member . According to claim 1 or 2 Symbol mounting of the electric on-off valve,
The electric opening / closing valve, wherein the lock mechanism is detachably attached to the body. The electric on-off valve according to any one of claims 1 to 3 ,
The electric on-off valve is used in a fuel cell system.

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