JP5881252B2 - Motorized valve - Google Patents

Description

  The present invention relates to an electric valve used for, for example, an expansion valve that controls the flow rate of refrigerant in a refrigeration cycle.

  Conventionally, in a refrigeration cycle, an expansion valve has been provided between the outdoor heat exchanger and the indoor heat exchanger, and in the cooling mode, the refrigerant from the outdoor heat exchanger is expanded by the expansion valve to exchange the indoor heat. In the heating mode, the refrigerant from the indoor heat exchanger is expanded by the expansion valve and led to the outdoor heat exchanger. As such an expansion valve, various motor-operated valves that control the flow rate of the refrigerant have been proposed so as to correspond to normal operation, defrost operation, dehumidification operation, and the like.

  In this type of electric valve, a stopper mechanism is provided to regulate the position of the valve with the maximum valve opening and the minimum valve opening (or the fully closed state). An electric valve provided with such a stopper mechanism is disclosed in Patent Document 1, for example.

  The motor-operated valve (indicated by reference numeral 800 in the figure) disclosed in Patent Document 1 is provided with a holder portion 821 that faces the valve port 801a in the valve chamber 801b of the valve body 801 as shown in FIG. A member 802 is disposed. A rotor shaft 803 to which a magnet rotor 852 is fixedly attached is screwed into the holder portion 821. A guide male screw 821b is formed on the outer peripheral surface of the holder portion 821, and a fixed lower end stopper portion SD1 and a fixed upper end stopper portion SU1 projecting radially from the guide male screw 821b are respectively provided at both ends of the guide male screw 821b. Is formed. A driven slider 804 is disposed on the side of the holder portion 821.

  As shown in FIG. 18, the driven slider 804 integrally includes an arc-shaped portion 841 and a movable lower end stopper portion MD1 and a movable upper end stopper portion MU1 provided at both ends of the arc-shaped portion 841. A guide female screw 804a is formed inside the arc-shaped portion 841, the movable lower end stopper portion MD1, and the movable upper end stopper portion MU1, and this guide female screw 804a is screwed to the guide male screw 821b of the holder portion 821. ing.

  The magnet rotor 852 is fixed to the rotor shaft 803 at the center thereof. Then, the rotor shaft 803 is rotated together with the magnet rotor 852 by the rotation of the magnet rotor 852, and the rotor shaft 803 is moved in the direction of the axis L (up and down in the drawing) by the screw feeding action, so that the valve body 832 is moved with respect to the valve port 801a. Advance and retreat.

  The magnet rotor 852 is composed of a columnar magnet portion 852a and an inner disk portion 852b. A protrusion 852c parallel to the axis L is formed on a part of the inner peripheral surface of the magnet portion 852a. Yes. When the magnet rotor 852 rotates, the protrusion 852c contacts the movable lower end stopper portion MD1 or the movable upper end stopper portion MU1 of the driven slider 804, and rotates the driven slider 804 in the same direction as the magnet rotor 852 rotates. Rotate like so. As a result, the driven slider 804 moves in the same direction as the rotor shaft 803 (up and down in the drawing) by the screw feeding action of the guide male screw 821b and the guide female screw 804a.

  When the magnet rotor 852 and the rotor shaft 803 rotate and move downward in the figure, the movable lower end stopper portion MD1 of the driven slider 804 comes into contact with the fixed lower end stopper portion SD1, and the driven slider 804, the magnet rotor 852, and the rotor shaft 803 rotate. The movement stops and the valve body 832 fully closes the valve port 801a. On the other hand, when the magnet rotor 852 and the rotor shaft 803 are moved upward in the drawing, the movable upper end stopper portion MU1 of the driven slider 804 contacts the fixed upper end stopper portion SU1, and the driven slider 804, the magnet rotor 852, and the rotor shaft 803 rotate. Stops, and the valve body 832 fully opens the valve port 801a.

JP 2010-38219 A

  However, in the motor-operated valve 800 described above, the configuration of the stopper mechanism configured by the holder portion 821 of the support member 802 and the driven slider 804 is complicated, so there is room for improvement in terms of manufacturing cost.

  Then, an object of this invention is to provide the motor operated valve provided with the stopper mechanism of a simpler structure.

In order to achieve the above object, a first aspect of the present invention provides a valve main body provided with a valve port provided inside and having a valve port that opens toward the valve chamber, and a distance from the valve port. A cylindrical holder portion that is disposed oppositely and is formed on the inner peripheral surface of a drive female screw that is coaxial with the valve port shaft, and a drive male screw that is paired with the drive female screw is formed on the outer peripheral surface. A rotor shaft screwed into the drive female screw, a valve body portion that moves forward and backward with respect to the valve port by movement of the rotor shaft in the axial direction, a magnet rotor fixed to the rotor shaft, and the magnet rotor A motor part that rotates the coil part, and a coil member that integrally has a coil part made of wire and a claw part that protrudes radially outward of the coil part, and the coil part of the coil member are screwed together And the coil part A guide rail formed integrally with the holder part on the outer peripheral surface of the holder part so that the holder part can move in the axial direction of the holder part by rotation thereof, and the guide rail on the outer peripheral surface of the holder part In the vicinity of both ends, there is provided a stopper abutting surface formed so that any one end of the coil portion of the coil member abuts and restricts the rotation of the coil member, and the coil member is connected to the magnet rotor. When the rotation of the magnet rotor is rotated and the rotation of the magnet rotor in the direction of the rotation is restricted when any one end of the coil portion abuts against the stopper contact surface corresponding to the rotation, the rotation of the magnet rotor is restricted. A claw receiving portion with which the claw portion of the coil member abuts is integrally provided on the inner peripheral surface of the magnet rotor, and the stopper abutting surface is the guide rail Ri is also an electric valve, characterized in that it is connected with the radially outward and is formed to extend in the guide rail of the holder portion. According to a second aspect of the present invention, there is provided a valve main body provided with a valve port provided inside and having a valve port opened toward the valve chamber, and opposed to the valve port with a gap therebetween. A cylindrical holder part having a drive female screw coaxial with the valve port shaft is formed on the inner peripheral surface, and a drive male screw paired with the drive female screw is formed on the outer peripheral surface, and is screwed onto the drive female screw. A combined rotor shaft, a valve body portion that moves forward and backward with respect to the valve port by movement of the rotor shaft in the axial direction, a magnet rotor fixed to the rotor shaft, and a motor portion that rotates the magnet rotor And a coil member integrally including a coil portion made of a wire and a claw portion protruding radially outward of the coil portion, and the coil member of the coil member are screwed together, and the coil member is Because of its rotation A guide rail formed integrally with the holder portion on the outer peripheral surface of the holder portion so as to be movable in the axial direction of the holder portion, and near both ends of the guide rail on the outer peripheral surface of the holder portion. A stopper abutting surface formed so that any one end of the coil portion of the coil member abuts against and restricts the rotation of the coil member is provided, and the coil member rotates as the magnet rotor rotates. The coil member is configured to restrict the rotation of the magnet rotor in the direction of rotation when any one end of the coil portion abuts against the stopper contact surface corresponding thereto and the rotation is restricted. A claw receiving portion with which the claw portion of the magnet rotor is abutted is integrally provided on the inner peripheral surface of the magnet rotor,
The stopper contact surface is an electric valve characterized in that the height from the outer peripheral surface of the holder portion is formed to be the same as the height of the guide rail and is connected to the guide rail.

The invention described in claim 3 is the invention described in claim 1 or 2 , wherein the stopper contact surface is formed in parallel to a radial direction and an axial direction of the holder portion. Is.

The invention described in claim 4 is the invention described in any one of claims 1 to 3 , wherein the guide rail is formed at one end portion of the holder portion so as to protrude in a radial direction of the holder portion. A hooking protrusion for hooking a part of the coil portion of the coil member when the coil member is screwed to the coil member is provided.

In order to achieve the above object, a fifth aspect of the present invention provides a valve main body provided with a valve port provided inside and having a valve port that opens toward the valve chamber, and a distance from the valve port. A cylindrical holder portion that is disposed oppositely and is formed on the inner peripheral surface of a drive female screw that is coaxial with the valve port shaft, and a drive male screw that is paired with the drive female screw is formed on the outer peripheral surface. A rotor shaft screwed into the drive female screw, a valve body portion that moves forward and backward with respect to the valve port by movement of the rotor shaft in the axial direction, a magnet rotor fixed to the rotor shaft, and the magnet rotor A motor part that rotates the coil part, and a coil member that integrally has a coil part made of wire and a claw part that protrudes radially outward of the coil part, and the coil part of the coil member are screwed together And the coil part And a guide groove formed integrally with the holder portion on the outer peripheral surface of the holder portion so that the holder member can move in the axial direction of the holder portion by rotation thereof, and both end portions of the guide groove are the coil members. The coil member is formed so as to be interrupted in the outer peripheral surface of the holder part so as to restrict the rotation of the coil member when any one end of the coil part comes into contact with the coil member. The rotation of the magnet rotor in the direction of the rotation is restricted when any one end of the coil portion abuts against the end of the guide groove corresponding thereto and the rotation is restricted. The motor-operated valve is characterized in that a claw receiving portion with which the claw portion of the coil member abuts is provided on the inner peripheral surface of the magnet rotor.

According to a sixth aspect of the present invention, in the fifth aspect of the present invention, stopper contact surfaces formed in parallel to the radial direction and the axial direction of the holder portion are provided at both ends of the guide groove. It is characterized by that.

The invention described in claim 7 is characterized in that, in the invention described in claim 5 or 6 , one end portion of the holder portion is formed in a tapered shape.

The invention described in claim 8 is the invention described in any one of claims 5 to 7 , wherein the coil member is integrated with the holder portion on the outer peripheral surface of the holder portion so that the coil member can be screwed together. The coil member mounting groove is further formed, and the coil member mounting groove is provided closer to the end of the holder part than the guide groove and arranged side by side in the axial direction of the guide groove and the holder part. An end of the guide groove side end of the guide groove is disposed close to and spaced from one end of the guide groove.

The invention described in claim 9 is the invention described in any one of claims 1 to 8 , wherein the number of turns of the coil member is at least 1 or more.

According to the first aspect of the present invention, either one end of the coil portion of the coil member abuts in the vicinity of both end portions of the guide rail on the outer peripheral surface of the holder portion so as to restrict the rotation of the coil member. The coil contact member is rotated with the rotation of the magnet rotor, and any one end of the coil portion abuts against the corresponding stopper contact surface to restrict the rotation. A claw receiving portion with which the claw portion of the coil member abuts is provided on the inner peripheral surface of the magnet rotor so as to restrict the rotation of the magnet rotor in the direction of rotation when it is done. Therefore, when the coil member is rotated with the rotation of the magnet rotor, and the coil member abuts against a stopper contact surface near one end of the guide rail and the rotation is restricted, the magnet rotor is rotated. Rotation in the direction is restricted. That is, the coil member and the stopper contact surface formed on the outer peripheral surface of the holder portion function as a stopper mechanism. Thereby, the structure of the stopper mechanism provided in the electric valve can be simplified. Moreover, since the stopper contact surface is formed to extend outward in the radial direction of the holder portion from the guide rail, the coil portion of the coil member expands in the radial direction when the coil member hits the stopper contact surface. Even when the situation where it deform | transforms like this occurs, it can suppress that a coil member gets over a stopper contact surface, and can suppress that a coil member falls from a guide rail.

According to the invention described in claim 3 , since the stopper contact surfaces provided in the vicinity of both end portions of the guide rail are formed in parallel to the radial direction and the axial direction of the holder portion, the coil member is either Rotation can be reliably controlled when it hits against the stopper contact surface.

According to the invention described in claim 4 , since the hook projecting piece formed so as to protrude in the radial direction of the holder portion is provided at one end portion of the holder portion, it is integrally formed on the outer peripheral surface of the holder portion. When the coil member is screwed into the guide rail, a part of the coil part of the coil member is hooked on the hooking projecting piece and the other part of the coil part opposite to the radial direction is pulled. Thus, the diameter of the coil portion can be easily expanded. For this reason, the coil member can be easily screwed onto the guide rail by inserting the holder portion inside the coil portion whose diameter has been expanded.

According to the fifth aspect of the present invention, when both ends of the guide groove into which the coil member is screwed come into contact with either one end of the coil portion of the coil member, the rotation of the coil member is restricted. The coil member is rotated with the rotation of the magnet rotor, and either one end of the coil hits the end of the corresponding guide groove. A claw receiving portion with which the claw portion of the coil member abuts so as to restrict the rotation of the magnet rotor in the direction of rotation when the rotation is restricted is provided on the inner peripheral surface of the magnet rotor. Therefore, when the coil member is rotated in accordance with the rotation of the magnet rotor, and the coil member abuts against one end of the guide groove and the rotation is restricted, the magnet rotor restricts the rotation in the direction of the rotation. Is done. That is, the coil member and the guide groove formed on the outer peripheral surface of the holder portion function as a stopper mechanism. Thereby, the structure of the stopper mechanism provided in the electric valve can be simplified.

According to the sixth aspect of the present invention, since the stopper contact surfaces formed in parallel to the radial direction and the axial direction of the holder portion are provided at both ends of the guide groove, the coil member is formed of the guide groove. The rotation can be reliably restricted when it hits one of the ends.

According to the invention described in claim 7 , since the one end portion of the holder portion is formed in a tapered shape, when the one end portion of the holder portion is inserted inside the coil member, the insertion proceeds. The diameter of the coil member gradually increases, so that the coil member can be easily screwed into the guide groove. Thereby, assemblability can be improved with a simple configuration, and the manufacturing cost can be reduced.

According to the invention described in claim 8 , further comprising a coil member mounting groove formed integrally with the holder portion on the outer peripheral surface of the holder portion so that the coil member can be screwed, the coil member mounting groove, The guide groove and the holder portion are arranged in the axial direction closer to the end of the holder portion than the guide groove, and one end portion of the coil member mounting groove is close to one end portion of the guide groove with a gap therebetween. First, the coil member is screwed into the coil member mounting groove near the end of the holder portion, and the coil member is rotated to move to one end near the guide groove in the coil member mounting groove. And the coil member is enlarged in diameter so as to get over a portion that partitions one end of the coil member mounting groove and one end of the guide groove on the outer peripheral surface of the holder portion, and the rotation of the coil member is advanced. And easily It can be screwed to the coil member id groove. Thereby, for example, even in the configuration in which the guide groove is provided at a position away from the end portion of the holder portion, the assemblability can be improved with a simple configuration, and the manufacturing cost can be further suppressed.

According to the ninth aspect of the present invention, since the number of windings of the coil member is at least 1 or more, the coil member can be surely screwed into the guide groove or the guide rail. It is possible to suppress the rotation of the magnet rotor with a simple configuration by suppressing dropping off from the groove or the guide rail.

It is a longitudinal cross-sectional view of the motor operated valve of the 1st Embodiment of this invention. It is a perspective view of the supporting member and coil member with which the motor operated valve of FIG. 1 is provided. It is a top view of the holder part of the supporting member of FIG. It is a perspective view of the coil member of FIG. FIG. 2A is an enlarged front view in the vicinity of a holder portion for explaining an example of a method for assembling the motor-operated valve in FIG. 1, in which (a) shows one of coil portions of a coil member on a valve opening upper limit stopper protrusion provided at one end portion of the holder portion; (B) shows a state in which the diameter of the coil portion is expanded from (a) and a holder portion is inserted inside the coil portion, and (c) is further inserted from (b). Is shown, and the coil member is screwed into the guide rail of the holder portion. It is a longitudinal cross-sectional view of the magnet rotor with which the motor operated valve of FIG. 1 is provided. It is a cross-sectional perspective view of the magnet rotor of FIG. (A) is a front view of the holder part vicinity at the time of the valve full open state in the motor operated valve of FIG. 1, (b) is a top view of (a). (A) is a rear view of the holder part vicinity at the time of the valve closing state in the motor operated valve of FIG. 1, (b) is sectional drawing which follows the AA line of (a). It is a longitudinal cross-sectional view of the motor operated valve of the 2nd Embodiment of this invention. (A) is a front view of the holder part vicinity at the time of the valve full open state in the motor operated valve of FIG. 10, (b) is sectional drawing which follows the AA line of (a). (A) is a rear view of the holder part vicinity at the time of the valve closing state in the motor operated valve of FIG. 10, (b) is sectional drawing which follows the BB line of (a). It is a perspective view of the coil member with which the motor operated valve of FIG. 10 is provided. It is an enlarged front view of the holder part vicinity explaining an example of the assembly method of the electric valve of FIG. 10, (a) shows the state which inserted the one end part of the holder part in the coil part of a coil member, (b) (A) shows the state where the insertion has been advanced, and (c) shows the state where the insertion has been further advanced from (b) and the coil member has been screwed into the guide groove of the holder portion. It is an enlarged front view which shows the structure of the modification of the supporting member (holder part) with which the electrically operated valve of FIG. 10 is provided. It is a perspective view which shows the structure of the other modification of the supporting member (holder part) with which the electrically operated valve of FIG. 10 is provided. It is a longitudinal cross-sectional view of the conventional motor operated valve. It is a figure which shows the driven slider with which the motor operated valve of FIG. 17 is provided.

(First embodiment)
Below, the motor operated valve of the 1st Embodiment of this invention is demonstrated with reference to FIGS.

  FIG. 1 is a longitudinal sectional view of a motor-operated valve according to a first embodiment of the present invention. FIG. 2 is a perspective view of a support member and a coil member provided in the motor-operated valve of FIG. FIG. 3 is a plan view of the holder portion of the support member of FIG. FIG. 4 is a perspective view of the coil member of FIG. FIG. 5 is an enlarged front view of the vicinity of the holder for explaining an example of the method for assembling the motor-operated valve in FIG. 1. FIG. 5 (a) is a diagram illustrating the coil opening on the valve opening upper limit stopper protrusion provided at one end of the holder. A state where a part of the coil part is hooked is shown, (b) shows a state where the diameter of the coil part is expanded from (a) and a holder part is inserted inside the coil part, and (c) shows (b) ), The insertion is further advanced, and the coil member is screwed into the guide rail of the holder portion. FIG. 6 is a longitudinal sectional view of a magnet rotor provided in the motor-operated valve of FIG. 7 is a cross-sectional perspective view of the magnet rotor of FIG. Fig.8 (a) is a front view of the holder part vicinity at the time of the valve full open state in the motor operated valve of FIG. 1, (b) is a top view of (a). Fig.9 (a) is a rear view of the holder part vicinity at the time of the valve closing state in the motor operated valve of FIG. 1, (b) is sectional drawing which follows the AA line of (a). In addition, the concept indicating the direction such as “up and down” in the following description corresponds to the direction in FIG. 1 and indicates the relative positional relationship of each member and indicates the absolute positional relationship. is not.

  As shown in FIG. 1, the motor-operated valve (shown by reference numeral 1) includes a valve body 10, a support member 20, a rotor shaft 30, a valve body portion 40, a coil member 50, and a stepping motor 60. And.

  The valve body 10 is formed in a cylindrical shape using, for example, a metal such as stainless steel. The valve main body 10 is provided with a valve seat portion 11 formed integrally with the valve main body 10 so as to close the lower end portion in the drawing. A valve port 11 a is opened at the center of the valve seat portion 11. The valve body 10 forms a valve chamber 12 inside.

  The valve body 10 is connected to a first joint pipe 13 as a fluid flow path such as a refrigerant on one side of the outer periphery, and the first joint pipe 13 is electrically connected to the valve chamber 12. Further, a second joint pipe 14 is connected to the valve seat portion 11, and the second joint pipe 14 is electrically connected to the valve chamber 12 through the valve port 11a. The first joint pipe 13 and the second joint pipe 14 are made of, for example, copper or brass, and are fixed to the valve body 10 by brazing or the like.

  The support member 20 is made of, for example, a substantially cylindrical holder portion 21 made of a synthetic resin such as PPS (polyphenylene sulfide) resin, and stainless steel integrally provided at the end portion of the holder portion 21 near the valve body 10 by insert molding. And a flange portion 22 made of steel. The support member 20 is fixed to the valve body 10 by the flange portion 22 being sandwiched between the valve body 10 and a stainless steel case 61 of a stepping motor 60 described later and welded to each other.

  The holder portion 21 is arranged such that its axis is overlapped with an axis L passing through the axis of the valve port 11a. A screw hole 23 and a slide hole 24 arranged in the direction of the axis L so as to penetrate the holder part 21 are formed at the center of the holder part 21. A drive female screw 23 a is formed on the inner peripheral surface of the screw hole 23, and a rotor shaft 30 described later is screwed into the screw hole 23. The slide hole 24 is disposed closer to the valve port 11 a and has a larger diameter than the screw hole 23. A valve body 40 described later is fitted into the slide hole 24 so as to be slidable.

  As shown in FIG. 2, the holder portion 21 has a guide rail 25 formed of a spiral protrusion on its outer peripheral surface 21 a. In the guide rail 25, winding portions adjacent to each other are arranged with an interval therebetween. Guide rail 25 guides each winding part of coil part 51 from one side or both sides so that coil part 51 of coil member 50 mentioned below is screwed together and coil member 50 can rotate in the peripheral direction. The guide rail 25 is disposed so that the axis of the guide rail 25 overlaps the axis L. In the present embodiment, a part of the outer peripheral surface 21a of the holder portion 21 is chamfered in the axis L direction. Thereby, the guide rail 25 is formed in a spiral shape that is virtually continuous in a chamfered portion, not in an actual continuous spiral shape. By doing in this way, the die cutting in the resin molding of the holder part 21 becomes easy. Of course, it is not limited to this, The holder part 21 may be formed in the cylindrical shape without chamfering as mentioned above, and the guide rail may be formed in the spiral shape which continued in fact.

  As shown in FIG. 3, the valve closing lower limit stopper protrusion protruding in the radial direction of the guide rail 25 is located in the vicinity of the end portion (lower end portion 25 a) of the guide rail 25 near the valve port 11 a on the outer peripheral surface 21 a of the holder portion 21. 26 is provided in the vicinity of the end portion (upper end portion 25b) of the outer peripheral surface 21a of the holder portion 21 on the side opposite to the lower end portion 25a of the guide rail 25. An upper limit stopper projection 27 is provided. The valve opening upper limit stopper protrusion 27 is disposed between the end surface (upper end portion 21 b) of the holder portion 21 and the upper end portion 25 b of the guide rail 25.

  A lower end portion of the guide rail 25 is placed on the valve closing lower limit stopper projection 26 so that a claw portion 52 of the coil member 50 abuts when a coil member 50 described later is guided by the guide rail 25 and reaches the lower end portion 25a. A lower limit stopper surface 26 a is formed so as to be parallel to the axis L and parallel to the radial direction of the guide rail 25 so as to intersect the guide rail 25 at 25 a. The lower limit stopper surface 26 a is formed extending from the guide rail 25 to the outer side in the radial direction of the holder portion 21. That is, the stopper contact surface 26 a is formed so that the height from the outer peripheral surface 21 a of the holder portion 21 is higher than that of the guide rail 25. The lower limit stopper surface 26a corresponds to a stopper contact surface.

  A guide rail is provided on the valve opening upper limit stopper projection 27 so that the other end 51b of the coil portion 51 of the coil member 50 abuts when a coil member 50 described later is guided by the guide rail 25 and reaches the upper end portion 25b. An upper limit stopper surface 27 a formed in parallel with the axis L and in parallel with the radial direction of the guide rail 25 is provided at the upper end portion 25 b of 25. The upper limit stopper surface 27 a is formed so as to extend outward from the guide rail 25 in the radial direction of the holder portion 21. That is, the upper limit stopper surface 27 a is formed so that the height from the outer peripheral surface 21 a of the holder portion 21 is higher than that of the guide rail 25. The valve opening upper limit stopper protrusion 27 corresponds to a hooking protrusion piece, and the upper limit stopper surface 27a corresponds to a stopper contact surface.

  In the present embodiment, the lower limit stopper surface 26a and the upper limit stopper surface 27a are formed in parallel with the axis L and in parallel with the radial direction of the guide rail 25, but the present invention is not limited to this. As long as it is a shape that restricts the rotation of the coil member 50 when one end 51a or the other end 51b of the coil portion 51 abuts, the shape and the direction of the surface are arbitrary as long as the object of the present invention is not violated. In the present embodiment, the lower limit stopper surface 26a and the upper limit stopper surface 27a are formed to extend outward in the radial direction of the holder portion 21 from the guide rail 25, but are not limited thereto. The height of the holder portion 21 from the outer peripheral surface 21a may be the same as that of the guide rail 25, and the shape and size thereof are arbitrary as long as the object of the present invention is not violated.

  In the present embodiment, the lower limit stopper surface 26a and the upper limit stopper surface 27a intersect with the guide rail 25 at the lower end portion 25a and the upper end portion 25b of the guide rail 25 (that is, connected to the guide rail 25). However, the present invention is not limited to this. For example, the lower limit stopper surface 26 a and the upper limit stopper surface 27 a may be provided with a gap from the lower end portion 25 a and the upper end portion 25 b of the guide rail 25. That is, the lower limit stopper surface 26a and the upper limit stopper surface 27a may be in contact with the guide rail 25 or may be provided with a gap between the lower limit stopper surface 26a and the object of the present invention. The lower surface portion of the guide rail 25 on the outer peripheral surface 21a of the holder portion 21 is such that the one end 51a or the other end 51b of the coil portion 51 of the coil member 50 abuts and the rotation of the coil member 50 is restricted. 25a and the upper end part 25b should just be formed.

  As shown in FIG. 1, the rotor shaft 30 is formed in a cylindrical rod shape using, for example, a metal such as stainless steel. A drive male screw 30a is formed on a part of the outer peripheral surface of the rotor shaft 30, and this drive male screw 30a is screwed to the drive female screw 23a of the holder portion 21 described above. Thereby, the rotor shaft 30 is arranged so that the axis thereof overlaps the axis L, and is moved in the direction of the axis L by a screw feed action by being rotated around the axis. In other words, the rotor shaft 30 is arranged so that the axis L and the axis are overlapped, and is supported so as to move in the direction of the axis L by being rotated about the axis. In the present embodiment, the drive female screw 23a and the drive male screw 30a are right-hand screws. A flange portion 31 is provided at an end portion of the rotor shaft 30 near the valve port 11a so that a valve body portion 40, which will be described later, can be rotated about the axis L.

  The valve body 40 includes a valve holder 41, a valve body 42, a washer 43, a spring receiver 44, and a compression coil spring 45.

  The valve holder 41 is formed in a cylindrical shape having an outer diameter substantially the same as the inner diameter of the slide hole 24 of the holder portion 21 described above. The valve holder 41 is fitted in the slide hole 24 so as to be slidable. Thus, the valve holder 41 is supported by the support member 20 so as to be movable in the direction of the axis L.

  The valve body 42 has a needle shape, and is fixed to the end portion (lower end portion 41a) of the valve holder 41 on the valve port 11a side so that the tip end of the needle shape faces the valve port 11a. The valve body 42 adjusts the flow rate by adjusting the interval with the valve seat portion 11 between the maximum valve opening and the minimum valve opening (or the fully closed state).

  A flange portion 31 of the rotor shaft 30 is rotatably engaged with an end portion (upper end portion 41b) of the valve holder 41 opposite to the valve port 11a side. Specifically, the washer 43 is sandwiched between the flange portion 31 of the rotor shaft 30 and the upper end portion 41 b of the valve holder 41 so that the rotor shaft 30 can be rotated by the upper end portion 41 b of the valve holder 41. I'm stuck. By this engagement, the valve holder 41 is supported by the rotor shaft 30 so as to be movable in the direction of the axis L and rotatable about the axis L. A spring receiver 44 is provided in the valve holder 41 so as to be movable in the direction of the axis L. A compression coil spring 45 is attached between the spring receiver 44 and the valve body 42 in a compressed state where a predetermined load is applied. Thereby, the spring receiver 44 is pressed against the rotor shaft 30 side and is in contact with the flange portion 31 of the rotor shaft 30.

  The coil member 50 is formed by bending a wire such as a steel material having spring properties. As shown in FIG. 4, the coil member 50 integrally includes a coil spring-like coil part 51 and a claw part 52 that protrudes radially outward from one end 51 a of the coil part 51. The coil portion 51 is wound at substantially the same diameter (thickness) as the interval between the winding portions of the guide rail 25 of the holder portion 21 and at the same pitch, and can be restored to the original diameter even if the diameter is increased to some extent. Has elasticity. The coil member 50 (specifically, the coil portion 51) is screwed to the guide rail 25 of the holder portion 21 so as to be rotatable in the circumferential direction. When the coil portion 51 is screwed to the guide rail 25, the entire coil portion 51 is accommodated between the winding portions of the guide rail 25, and is screwed to a part of the guide rail 25 in the axis L direction. In other words, the length of the coil portion 51 in the axis L direction is shorter than the length of the guide rail 25 in the axis L direction. Therefore, the coil part 51 is guided by the guide rail 25 and moves in the direction of the axis L when rotated in a state of being screwed to the guide rail 25. The coil member 50 can be easily manufactured by bending a wire.

  In this embodiment, the coil member 50 and the guide rail 25 are right-handed screws, and the pitch of the guide rail 25 and the coil member 50 is set larger than the pitch of the drive female screw 23a and the drive male screw 30a. Moreover, it is preferable that the coil part 51 is 5/4 turn (450 degree | times) and the number of turns is 1 or more. Of course, it is not limited to such a configuration. For example, the pitch of the guide rail 25 and the coil member 50 and the pitch of the drive female screw 23a and the drive male screw 30a are set to be the same, or the coil portion 51 is These configurations are arbitrary as long as they are not contrary to the object of the present invention, such as two or more turns.

  The coil member 50 is screwed into the guide rail 25 of the holder part 21 by elastically deforming the coil part 51 so as to expand the diameter and by inserting the holder part 21 inside the coil part 51 and restoring the shape.

  Here, a method of assembling the coil member 50 to the guide rail 25 will be described. FIGS. 5A to 5C are diagrams illustrating a method of assembling the coil member 50 to the guide rail 25. FIG.

  First, as shown in FIG. 5A, the valve opening upper limit stopper protrusion 27 provided at the upper end (upper end portion 21 b) of the holder portion 21 of the support member 20 in the drawing is passed through the inside of the coil member 50. Part of the coil part 51 (indicated by symbol A in the figure) is hooked. Then, as shown in FIG. 5B, a part of the coil part 51 hooked on the valve-opening upper limit stopper protrusion 27 and another part (indicated by symbol B in the figure) facing the radial direction are replaced with the coil part. The upper end portion 21b of the holder portion 21 is inserted inside the coil portion 51 whose diameter has been increased while being close to the upper end portion 21b of the holder portion 21 while pulling 51 so as to increase the diameter. When the insertion of the upper end portion 21 b of the holder portion 21 is further advanced, the one end 51 a of the coil portion 51 gets over a part of the guide rail 25, and the coil portion 51 of the coil member 50 is screwed to the guide rail 25. . In this way, the coil member 50 is assembled to the guide rail 25.

  As shown in FIG. 1, the stepping motor 60 has a case 61, a magnet rotor 62, and a stator coil 63.

  The case 61 is made of a metal such as stainless steel, for example, and is formed in a substantially cylindrical shape with one end on the upper side in the figure closed. The lower end of the case 61 in the drawing is airtightly fixed to the valve body 10 by welding or the like with the flange portion 22 of the support member 20 sandwiched between the case 61 and the valve body 10.

  The magnet rotor 62 has a cylindrical magnet portion 64 whose outer peripheral portion is magnetized in multiple poles, and a disc portion 65 that closes one end of the magnet portion. The magnet rotor 62 is fixed to the rotor shaft 30 via a metal fitting 66 integrally formed at the center of the disk portion 65. Thereby, the magnet rotor 62 is provided in the case 61 so as to be rotatable around the axis of the rotor shaft 30.

  The stator coil 63 is disposed on the outer peripheral surface of the case 61. When a pulse signal is given to the stator coil 63, the magnet rotor 62 is rotated according to the number of pulses. The stator coil 63 corresponds to a motor unit.

  When the magnet rotor 62 is rotated, the rotor shaft 30 is rotated together with the magnet rotor 62, and the rotor shaft 30 is moved in the axis L direction (vertical direction in FIG. 1) by the screw feeding action of the drive male screw 30a and the drive female screw 23a. The valve body 40 moves forward and backward with respect to the valve port 11a. Thereby, the opening degree of the valve port 11a is changed, and the flow rate of the fluid flowing from the first joint pipe 13 to the second joint pipe 14 (or from the second joint pipe 14 to the first joint pipe 13) is controlled.

  As shown in FIGS. 6 and 7, a protrusion 67 as a claw receiving portion extending in the axis L direction is formed on a part of the inner peripheral surface of the magnet portion 64 of the magnet rotor 62. The protrusion 67 abuts on the claw portion 52 of the coil member 50 when the magnet rotor 62 rotates, and rotates to rotate (push) the coil member 50 in the same direction as the magnet rotor 62 rotates. . Thereby, the coil member 50 moves along the axis L in the same direction as the rotor shaft 30 by the screw feeding action of the guide rail 25 and the coil portion 51 of the coil member 50. In the present embodiment, the ridge 67 is provided on the inner peripheral surface of the magnet portion 64, but in place of the ridge 67, a concave groove as a claw receiving portion extending in the direction of the axis L is provided. May be.

  The coil member 50 moves in the direction of the axis L so as to approach the valve port 11a by rotating clockwise when viewed from above in FIG. At this time, the claw abutment surface 67a with which the claw portion 52 of the ridge 67 abuts is formed in parallel with the radial direction of the guide rail 25 and in parallel with the axis L direction.

  Further, the coil member 50 moves in the direction of the axis L so as to be separated from the valve port 11a by being rotated counterclockwise when viewed from above in FIG. At this time, the other claw abutment surface 67b with which the claw portion 52 of the ridge 67 abuts is formed parallel to the radial direction of the guide rail 25 and parallel to the axis L direction.

  Next, operation | movement of the motor operated valve 1 of this embodiment is demonstrated with reference to FIG. 8, FIG.

  In the motor-operated valve 1, the magnet rotor 62 and the rotor shaft 30 are rotated so as to move in a direction away from the valve port 11a (upward in FIG. 1). Then, the other claw contact surface 67b located on the opposite side of the claw contact surface 67a of the protrusion 67 of the magnet rotor 62 contacts the claw portion 52 of the coil member 50, and the claw portion 52 is pushed by the other claw contact surface 67b. The coil member 50 is pushed around in the circumferential direction. Then, when the valve body 40 is moved to a position where the maximum opening degree is accompanied with the movement in the axis L direction due to the rotation of the rotor shaft 30, as shown in FIGS. 8A and 8B, the coil member The other end 51b of the 50 coil portions 51 abuts on the upper limit stopper surface 27a of the valve opening upper limit stopper projection 27, and the rotation of the coil member 50 is restricted. Then, further rotation of the magnet rotor 62 that has pushed the claw 52 is restricted, and the movement of the valve body 40 beyond the position where the maximum opening degree is reached is restricted.

  Alternatively, in the motor-operated valve 1, the magnet rotor 62 and the rotor shaft 30 are rotated so as to move in a direction approaching the valve port 11a (downward in FIG. 1). Then, the claw contact surface 67a of the protrusion 67 of the magnet rotor 62 contacts the claw portion 52 of the coil member 50, and the claw portion 52 is pushed by the claw contact surface 67a, so that the coil member 50 is pushed in the circumferential direction. Then, when the valve body 40 is moved to a position where the opening degree is minimum (or the valve is closed) with the movement in the axis L direction due to the rotation of the rotor shaft 30, the state shown in FIGS. As shown, the claw portion 52 of the coil member 50 hits the lower limit stopper surface 26a of the valve closing lower limit stopper projection 26, and the rotation of the coil member 50 is restricted. Then, further rotation of the magnet rotor 62 that has pushed the claw 52 is also restricted, and the valve body 40 is restricted from being moved beyond the minimum opening (or valve closed state). Is done.

  As described above, the motor-operated valve 1 according to the present embodiment has an interval between the valve body 10 provided with the valve chamber 11 provided inside and the valve port 11a opened toward the valve chamber 12, and the valve port 11a. A cylindrical holder portion 21 having a female female screw 23a formed on the inner peripheral surface, which is disposed oppositely and coaxial with the axis L of the valve port 11a, and a female male screw 30a paired with the female female screw 23a is an outer peripheral surface. Fixed to the rotor shaft 30, the rotor shaft 30 screwed into the drive female screw 23a, the valve body portion 40 that moves forward and backward with respect to the valve port 11a by the movement of the rotor shaft 30 in the axis L direction. A magnet rotor 62 and a stator coil 63 that rotates the magnet rotor 62 are provided. In addition, the motor-operated valve 1 includes a coil member 51 formed of a wire and a coil member 50 integrally including a claw portion 52 protruding outward in the radial direction of the coil portion 51, and the coil portion 51 of the coil member 50 are screwed together. A guide rail 25 formed integrally with the holder portion 21 is provided on the outer peripheral surface 21a of the holder portion 21 so that the member 50 can move in the axial direction of the holder portion 21 by its rotation. Then, one end 51 a or the other end 51 b of the coil portion 51 of the coil member 50 abuts in the vicinity of the lower end portion 25 a and the upper end portion 25 b of the guide rail 25 on the outer peripheral surface 21 a of the holder portion 21 and regulates the rotation of the coil member 50. The lower limit stopper surface 26a and the upper limit stopper surface 27a formed as described above are provided, the coil member 50 is rotated with the rotation of the magnet rotor 62, and one end 51a or the other end 51b of the coil portion 51 corresponds to the lower limit stopper surface. 26a, a protrusion 67 on which the claw portion 52 of the coil member 50 abuts so as to restrict the rotation of the magnet rotor 62 in the direction of rotation when it abuts against the upper limit stopper surface 27a and is restricted from rotating. It is provided on the inner peripheral surface of the rotor 62.

  Further, the motor-operated valve 1 has a lower limit stopper surface 26 a and an upper limit stopper surface 27 a formed in parallel to the radial direction and the axial direction of the holder portion 21.

  Further, the motor-operated valve 1 is formed such that a lower limit stopper surface 26 a and an upper limit stopper surface 27 a extend from the guide rail 25 to the outer side in the radial direction of the holder portion 21.

  Further, the motor-operated valve 1 is provided with a valve opening upper limit stopper protrusion 27 formed on the upper end portion 21 b of the holder portion 21 so as to protrude in the radial direction of the holder portion 21.

  Moreover, as for the motor operated valve 1, the winding number of a coil member is at least 1 or more.

  As described above, according to the present embodiment, one end 51a or the other end 51b of the coil portion 51 of the coil member 50 abuts in the vicinity of the lower end portion 25a and the upper end portion 25b of the guide rail 25 on the outer peripheral surface 21a of the holder portion 21. A lower limit stopper surface 26a and an upper limit stopper surface 27a formed so as to restrict the rotation of the coil member 50 are provided, and the coil member 50 is rotated with the rotation of the magnet rotor 62 and the one end 51a of the coil portion 51 or When the other end 51b hits the lower limit stopper surface 26a or the upper limit stopper surface 27a corresponding thereto and the rotation is restricted, the claw portion 52 of the coil member 50 restricts the rotation of the magnet rotor 62 in the direction of the rotation. A protrusion 67 to be abutted is provided on the inner peripheral surface of the magnet rotor 62. Therefore, the coil member 50 is rotated in accordance with the rotation of the magnet rotor 62, and the coil member 50 abuts against the lower limit stopper surface 26a near the lower end portion 25a of the guide rail 25 or the upper limit stopper surface 27a near the upper end portion 25b and rotates. Is restricted, the magnet rotor 62 is restricted from rotating in the direction of the rotation. That is, the coil member 50 and the lower limit stopper surface 26a and the upper limit stopper surface 27a formed on the outer peripheral surface 21a of the holder portion 21 function as a stopper mechanism. Thereby, the structure of the stopper mechanism provided in the electric valve 1 can be simplified.

  Further, according to the present invention, the lower limit stopper surface 26 a and the upper limit stopper surface 27 a provided in the vicinity of the lower end portion 25 a and the upper end portion 25 b of the guide rail 25 are formed in parallel to the radial direction and the axial direction of the holder portion 21. Therefore, when the coil member 50 hits the lower limit stopper surface 26a and the upper limit stopper surface 27a, the rotation can be reliably restricted.

  Further, since the lower limit stopper surface 26a and the upper limit stopper surface 27a are formed to extend outward in the radial direction of the holder portion 21 from the guide rail 25, the coil member 50 abuts against the lower limit stopper surface 26a and the upper limit stopper surface 27a. Thus, even when the coil portion 51 of the coil member 50 is deformed so as to expand in the radial direction, the coil member 50 is prevented from getting over the lower limit stopper surface 26a and the upper limit stopper surface 27a. The coil member 50 can be prevented from falling off the guide rail 25.

  Further, the upper end portion 21 b of the holder portion 21 is provided with a valve opening upper limit stopper projection 27 that protrudes in the radial direction of the holder portion 21, so that it is formed integrally with the outer peripheral surface 21 a of the holder portion 21. When the coil member 50 is screwed to the guide rail 25, a part of the coil part 51 of the coil member 50 is hooked on the valve opening upper limit stopper protrusion 27, and the part of the coil part 51 is opposed to the part in the radial direction. The diameter of the coil part 51 can be easily expanded by pulling a part of. Therefore, the coil member 50 can be easily screwed to the guide rail 25 by inserting the holder portion 21 inside the coil portion 51 whose diameter has been increased.

  In addition, since the number of turns of the coil member 50 is at least 1 or more, the coil member 50 can be reliably screwed to the guide rail, and therefore, the coil member 50 can be prevented from falling off from the guide rail, The rotation of the magnet rotor 62 can be reliably regulated with a simple configuration.

(Second Embodiment)
Below, the motor operated valve of the 2nd Embodiment of this invention is demonstrated with reference to FIGS.

  FIG. 10 is a longitudinal sectional view of a motor-operated valve according to the second embodiment of the present invention. Fig.11 (a) is a front view of the holder part vicinity at the time of the valve full open state in the motor operated valve of FIG. 10, (b) is sectional drawing which follows the AA line of (a). Fig.12 (a) is a rear view of the holder part vicinity at the time of the valve closing state in the motor operated valve of FIG. 10, (b) is sectional drawing which follows the BB line of (a). FIG. 13 is a perspective view of a coil member provided in the electric valve of FIG. FIG. 14 is an enlarged front view of the vicinity of the holder portion for explaining an example of the assembly method of the motor-operated valve in FIG. 10, and (a) shows a state where one end portion of the holder portion is inserted into the coil portion of the coil member; (B) shows a state in which the insertion is advanced from (a), and (c) shows a state in which the insertion is further advanced from (b) and the coil member is screwed into the guide groove of the holder portion. In addition, the concept of “upper and lower” in the following description corresponds to the upper and lower sides in FIG. 1 and indicates the relative positional relationship between the members, and does not indicate the absolute positional relationship. In the second embodiment, each component is assigned a symbol independently of the first embodiment. That is, in the second embodiment, even if the same reference numerals as those in the first embodiment are given, the same components as those in the first embodiment are not necessarily shown.

  This electric valve (indicated by reference numeral 100 in the figure) has a cylindrical valve body 1. The valve body 1 is provided with a valve seat portion 1A that is integrally formed with the valve body 1 so as to close the lower opening. A valve port 1a is opened in the valve seat portion 1A. A support member 2 is attached to the upper opening opposite to the opening where the valve seat 1A is provided. Thereby, the valve main body 1 forms the valve chamber 1b inside. A first joint pipe 11 serving as a flow path for a fluid such as a refrigerant is connected to the valve body 1 on one side of the outer periphery, and the first joint pipe 11 is electrically connected to the valve chamber 1b. A second joint pipe 12 is connected to the valve seat portion 1A, and the second joint pipe 12 is electrically connected to the valve chamber 1b via the valve port 1a. The first joint pipe 11, the second joint pipe 12, and the support member 2 are fixed to the valve body 1 by brazing or the like.

  The support member 2 has a central cylindrical holder portion 21 and a flange portion 22 on the outer periphery of the lower end portion of the holder portion 21. The upper end portion 21e of the holder portion 21 is formed in a tapered shape with a tapered outer diameter that gradually decreases toward the top. The support member 2 is attached to the valve body 1 by a flange portion 22. The support member 2 is molded from a synthetic resin.

  In the center of the holder portion 21, a drive female screw 21a coaxial with the axis L of the valve port 1a and its screw hole are formed. That is, the drive female screw 21 a is formed on the inner peripheral surface of the holder portion 21. A cylindrical slide hole 211 having a diameter larger than the outer periphery of the screw hole of the drive female screw 21a is formed at the center of the holder portion 21 on the valve port 1a side. A cylindrical rod-shaped rotor shaft 3 is disposed in the screw hole and the slide hole 211 of the drive female screw 21a.

  A cylindrical valve holder 31 is fitted in the slide hole 211 so as to be slidable in the axis L direction. Thereby, the valve holder 31 is supported via the support member 2 so as to be movable in the axis L direction. The valve holder 31 is attached coaxially with the valve chamber 1b, and a needle-like valve body 32 is fixed to the lower end of the valve holder 31 on the valve port 1a side. The valve body portion 32 adjusts the flow rate by adjusting the interval with the valve seat portion 1A between the maximum valve opening and the minimum valve opening (or the fully closed state).

  Further, the valve holder 31 is engaged with the rotor shaft 3. That is, a flange portion 3 b is integrally formed at the lower end portion of the rotor shaft 3, and the flange portion 3 b sandwiches the washer 33 together with the upper end portion of the valve holder 31, and the lower end portion of the rotor shaft 3 is the upper end portion of the valve holder 31. It is caught so that it can rotate. Due to this engagement, the valve holder 31 is supported by the rotor shaft 3 so as to be rotatably suspended. A spring receiver 34 is provided in the valve holder 31 so as to be movable in the axis L direction. A compression coil spring 35 is attached between the spring receiver 34 and the valve body 32 in a state where a predetermined load is applied. Accordingly, the spring receiver 34 is biased upward and is in contact with the lower end portion of the rotor shaft 3.

  A drive male screw 3 a is formed on the outer peripheral surface of the rotor shaft 3, and this drive male screw 3 a is screwed to the drive female screw 21 a of the holder portion 21. In the present embodiment, the drive female screw 21a and the drive male screw 3a are right-hand screws.

  The holder portion 21 is formed with a spiral guide groove 21b on its outer peripheral surface 21f.

  As shown in FIGS. 11A and 11B, a valve opening side stopper contact surface 21b2 parallel to the radial direction and the axial direction of the holder portion 21 is formed on the upper end 21b1 of the guide groove 21b. Thus, the upper end 21b1 of the guide groove 21b is formed to be interrupted in the outer peripheral surface 21f of the holder portion 21.

  As shown in FIGS. 12A and 12B, a valve closing side stopper contact surface 21b4 parallel to the radial direction and the axial direction of the holder portion 21 is formed at the lower end 21b3 of the guide groove 21b. Thus, the lower end 21b3 of the guide groove 21b is formed to be interrupted in the outer peripheral surface 21f of the holder portion 21.

  The coil member 4 is screwed into the guide groove 21b.

  The coil member 4 is formed by bending a wire such as a steel material used for a spring or the like. As shown in FIG. 13, the coil member 4 integrally includes a coil spring-like coil portion 41 and a claw portion 42 that protrudes radially outward from one end 41 a of the coil portion 41. The coil part 41 is formed with substantially the same diameter and the same pitch as the guide groove 21b of the holder part 21, and has elasticity that can be restored to the original diameter even if the diameter is increased to some extent. The coil member 4 (specifically, the coil part 41) is screwed into the guide groove 21 b of the holder part 21. When the coil portion 41 is screwed into the guide groove 21b, the entire coil portion 41 is accommodated in the guide groove 21b and screwed into a partial section in the axis L direction of the guide groove 21b. In other words, the length of the coil portion 41 in the axis L direction is shorter than the length of the guide groove 21b in the axis L direction. Therefore, the coil part 41 moves in the guide groove 21b when rotated in a state of being screwed into the guide groove 21b. In the present embodiment, the claw portion 42 is provided so as to be connected to one end of the coil portion 41. However, the claw portion 42 is not limited to this, and the claw portion 42 is provided at an intermediate portion of the coil portion 41 (a portion that enters inside from both end portions). You may connect and provide.

  In this embodiment, the coil member 4 and the guide groove 21b are right-handed screws, and the pitch of the guide groove 21b (coil member 4) is set larger than the pitch of the drive female screw 21a (and drive male screw 3a). . Moreover, the coil part 41 is 5/4 times (450 degrees), and it is preferable that the number of turns is 1 or more. Of course, it is not limited to such a configuration. For example, the pitch of the guide groove 21b (coil member 4) and the pitch of the drive female screw 21a (and drive male screw 3a) are set to be the same, or the coil These configurations are arbitrary as long as the part 41 is wound twice or more and does not contradict the object of the present invention.

  Here, a method for assembling the coil member 4 in the guide groove 21b will be described. 14A to 14C are views for explaining a method of assembling the coil member 4 in the guide groove 21b.

  First, as shown in FIG. 14A, the upper end portion 21 e of the holder portion 21 of the support member 2 is inserted inside the coil member 4. Then, when this insertion is advanced, as shown in FIG. 14B, the upper end portion 21e of the holder portion 21 is formed in a tapered shape, so that the diameter of the coil portion 41 of the coil member 4 gradually increases. Can be spread. When the insertion is further advanced, the inner diameter of the coil portion 41 of the coil member 4 extends to the outer diameter of the holder portion 21, and one end 41a of the coil portion 41 reaches the guide groove 21b and enters therein. When the coil member 4 is rotated around the axis in this state, the coil member 4 is gradually screwed into the guide groove 21b, and the other end 41b of the coil portion 41 enters the guide groove 21b. The whole coil part 41 is screwed together. In this way, the coil member 4 is assembled in the guide groove 21b.

  As shown in FIG. 10, a case 51 of a stepping motor 5 as a motor unit is airtightly fixed to the upper end of the valve body 1 by welding or the like. In the case 51, a magnet rotor 52 having an outer peripheral portion magnetized in multiple poles is rotatably provided. A stator coil 53 is disposed on the outer periphery of the case 51. The stepping motor 5 rotates the magnet rotor 52 according to the number of pulses when a pulse signal is given to the stator coil 53.

  The magnet rotor 52 is fixed to the rotor shaft 3 at the center thereof. Then, the rotor shaft 3 is rotated together with the magnet rotor 52 by the rotation of the magnet rotor 52, and the rotor shaft 3 is moved in the axis L direction (up and down) by the screw feeding action of the drive male screw 3a and the drive female screw 21a. The part 32 moves forward and backward with respect to the valve port 1a. Thereby, the opening degree of the valve port 1a is changed, and the flow rate of the fluid flowing from the first joint pipe 11 to the second joint pipe 12 or the flow rate of the fluid flowing from the second joint pipe 12 to the first joint pipe 11 is controlled. The A pressure equalizing hole 22a is formed in the flange portion 22 of the support member 2, and the inside of the case 51 is always at the same pressure as the valve chamber 1b.

  The magnet rotor 52 includes a cylindrical magnet portion 521 and a disk portion 522 inside the magnet portion 521, and a protrusion as a claw receiving portion parallel to the axis L is formed on a part of the inner peripheral surface of the magnet portion 521. 523 is formed. The protrusions 523 come into contact with the claw portions 42 of the coil member 4 when the magnet rotor 52 rotates, and rotate so as to rotate (push and turn) the coil member 4 in the same direction as the magnet rotor 52 rotates. . Thereby, the coil member 4 moves in the same direction (up and down) as the rotor shaft 3 by the screw feeding action of the guide groove 21 b and the coil portion 41 of the coil member 4. In the present embodiment, the protrusion 523 is provided on the inner peripheral surface of the magnet portion 521. However, instead of the protrusion 523, a concave groove as a claw receiving portion parallel to the axis L may be provided. Good.

  Next, the operation of the motor-operated valve 100 according to the present embodiment will be described with reference to FIGS.

  In the motor-operated valve 100, the magnet rotor 52 and the rotor shaft 3 are rotated so as to move upward in the figure. Then, the protrusion 523 of the magnet rotor 52 contacts the claw part 42 of the coil member 4, and the claw part 42 of the coil member 4 is pushed by the protrusion 523, so that the coil member 4 is rotated. Then, when the valve body 32 is moved to a position where the valve is fully opened along with the movement of the rotor shaft 3 in the axial direction due to the rotation, as shown in FIGS. The other end 41b of the coil portion 41 abuts against the valve-opening stopper contact surface 21b2 of the upper end 21b1 of the guide groove 21b, and the rotation of the coil member 4 is restricted. Then, further rotation of the magnet rotor 52 that has pushed the claw portion 42 of the coil member 4 is also restricted, and the rotation is stopped.

  In the motor-operated valve 100, the magnet rotor 52 and the rotor shaft 3 are rotated so as to move downward in the figure. Then, the protrusion 523 of the magnet rotor 52 contacts the claw part 42 of the coil member 4, and the claw part 42 of the coil member 4 is pushed by the protrusion 523, so that the coil member 4 is rotated. Then, when the valve element 32 is moved to a position where the valve opening 32 (or the valve is fully closed) with the movement of the rotor shaft 3 in the axial direction due to the rotation, FIGS. 12A and 12B. As shown, one end 41a of the coil portion 41 of the coil member 4 abuts against the valve closing stopper contact surface 21b4 of the lower end 21b3 of the guide groove 21b, and the rotation of the coil member 4 is restricted. Then, further rotation of the magnet rotor 52 that has pushed the claw portion 42 of the coil member 4 is also restricted, and the rotation is stopped.

  As described above, the motor-operated valve 100 according to the present embodiment has an interval between the valve body 1 provided with the valve chamber 1b inside and the valve port 1a that opens toward the valve chamber 1b, and the valve port 1a. A cylindrical holder portion 21 formed on the inner peripheral surface with a drive female screw 21a that is open and opposed and coaxial with the axis L of the valve port 1a, and a drive male screw 3a that is paired with the drive female screw 21a is an outer peripheral surface. The rotor shaft 3 screwed into the drive female screw 21a, the valve body 32 that moves forward and backward with respect to the valve port 1a by the movement of the rotor shaft 3 in the axial direction, and the magnet fixed to the rotor shaft 3. A rotor 52 and a motor unit 5 that rotates the magnet rotor 52 are provided. And the coil part 41 which consists of the coil part 41 which consists of a coil part 41 which consists of a wire, and the coil part 41 radially outward, and the coil part 41 of the coil member 4 are screwed together, and the coil member 4 rotates the coil member 4 Guide groove 21b formed integrally with the holder part 21 on the outer peripheral surface 21f of the holder part 21 so as to be movable in the axial direction of the holder part 21, and an upper end 21b1 and a lower end 21b3 of the guide groove 21b are When one end 41a or the other end 41b of the coil part 41 of the coil member 4 abuts, the coil member 4 is formed so as to be interrupted in the outer peripheral surface 21f of the holder part 21 so as to restrict the rotation of the coil member 4. 52, one end 41a or the other end 41b of the coil portion 41 is rotated to the upper end 21b1 and the lower end 21b3 of the corresponding guide groove 21b. A protrusion 523 with which the claw portion 42 of the coil member 4 abuts so as to restrict the rotation of the magnet rotor 52 in the direction of rotation when the rotation is restricted by contact with the inner surface of the magnet rotor 52. Is provided.

  Further, a valve opening stopper contact surface 21b2 formed in parallel to the radial direction and the axial direction of the holder portion 21 is provided at the upper end 21b1 of the guide groove 21b, and the radius of the holder portion 21 is provided at the lower end 21b3 of the guide groove 21b. The valve closing side stopper contact surface 21b4 formed in parallel with the direction and the axial direction is provided.

  Moreover, the upper end part 21e of the holder part 21 is formed in the taper taper shape.

  Further, the number of turns of the coil member 4 (specifically, the coil portion 41) is at least 1 or more.

  As described above, according to the present embodiment, when the upper end 21b1 and the lower end 21b3 of the guide groove 21b into which the coil member 4 is screwed, the one end 41a or the other end 41b of the coil portion 41 of the coil member 4 abuts the coil. It is formed in the outer peripheral surface 21f of the holder portion 21 so as to restrict the rotation of the member 4, the coil member 4 is rotated with the rotation of the magnet rotor 52, and the coil portion 41 has one end 41a or the other end 41b corresponding thereto. When the rotation is restricted by abutting against the upper end 21b1 and the lower end 21b3 of the guide groove 21b, the protrusions with which the claw portions 42 of the coil member 4 abut so as to restrict the rotation of the magnet rotor 52 in the direction of the rotation. 523 is provided on the inner peripheral surface of the magnet rotor 52. Therefore, when the coil member 4 is rotated in accordance with the rotation of the magnet rotor 52 and the coil member 4 abuts against the upper end 21b1 or the lower end 21b3 of the guide groove 21b and the rotation is restricted, the magnet rotor 52 is rotated in the direction of the rotation. Rotation is regulated. That is, the coil member 4 and the guide groove 21b formed on the outer peripheral surface 21f of the holder portion 21 function as a stopper mechanism. Thereby, the structure of the stopper mechanism provided in the electric valve 100 can be simplified. Therefore, for example, the manufacturing cost can be suppressed.

  Further, a valve opening stopper contact surface 21b2 formed in parallel to the radial direction and the axial direction of the holder portion 21 is provided at the upper end 21b1 of the guide groove 21b, and the radius of the holder portion 21 is provided at the lower end 21b3 of the guide groove 21b. Since the valve closing side stopper contact surface 21b4 formed parallel to the direction and the axial direction is provided, the rotation of the coil member 4 is surely restricted when the coil member 4 hits the upper end 21b1 or the lower end 21b3 of the guide groove 21b. Can do.

  Further, since the upper end portion 21e of the holder portion 21 is formed in a tapered shape, when the upper end portion 21e of the holder portion 21 is inserted inside the coil member 4, the diameter of the coil member 4 increases as the insertion proceeds. Gradually spread, and therefore, the coil member 4 can be easily screwed into the guide groove 21b. Thereby, assemblability can be improved with a simple configuration, and the manufacturing cost can be reduced.

  In addition, since the number of turns of the coil member 4 is at least 1 or more, the coil member 4 can be surely screwed into the guide groove 21b, so that the coil member 4 is prevented from falling off from the guide groove 21b. Thus, the rotation of the magnet rotor 52 can be reliably regulated with a simple configuration.

  Although the present invention has been described with reference to the preferred embodiment, the motor-operated valve of the present invention is not limited to the configuration of the above embodiment.

  For example, in the second embodiment described above, only the guide groove 21b is provided on the outer peripheral surface 21f of the holder portion 21 of the support member 2, but the present invention is not limited to this. For example, as shown in FIG. 15, the holder member 21 and the outer peripheral surface 21 f of the holder portion 21 are connected to the coil member 4 so that the coil member 4 can be screwed together (that is, in the same winding direction as the guide groove 21 b and substantially the same pitch). You may further provide the coil member attachment groove | channel 21c formed integrally. The coil member mounting groove 21c is provided in the axial direction of the guide groove 21b and the holder portion 21 closer to the upper end portion 21e of the holder portion 21 than the guide groove 21b. Further, the lower end 21c1 on the guide groove 21b side of the coil member mounting groove 21c is disposed in close proximity to the upper end 21b1 of the guide groove 21b. FIG. 15 is an enlarged front view showing a configuration of a modified example of a support member (holder portion) included in the motor-driven valve of FIG.

  In this way, first, the coil member 4 is screwed into the coil member mounting groove 21c near the upper end portion 21e of the holder portion 21, and the coil member 4 is rotated to move closer to the guide groove 21b in the coil member mounting groove 21c. The diameter of the coil member 4 is increased so as to get over the portion D that partitions the lower end 21c1 of the coil member mounting groove 21c and the upper end 21b1 of the guide groove 21b on the outer peripheral surface 21f of the holder portion 21. The coil member 4 can be easily screwed into the guide groove 21b by advancing the rotation of the coil member 4. Thereby, for example, even in the configuration in which the guide groove 21b is provided at a position away from the upper end portion 21e of the holder portion 21, the assemblability can be improved with a simple configuration, and the manufacturing cost can be further suppressed. .

  Moreover, in 2nd Embodiment mentioned above, although the holder part 21 which the supporting member 2 has was formed in the column shape, it is not limited to this. For example, as illustrated in FIG. 16, a configuration in which a part of the outer peripheral surface 21 f of the holder portion 21 is chamfered in the axial direction may be employed. In the case of this configuration, the guide groove 21b 'is not formed in an actual continuous spiral shape, but is formed in a virtually continuous spiral shape at the chamfered portion. By doing in this way, the mold release in the resin molding of the support member 2 (holder part 21) becomes easy. FIG. 16 is a perspective view showing the configuration of another modification of the support member (holder part) provided in the motor-operated valve of FIG.

  Moreover, in 2nd Embodiment mentioned above, although the nail | claw part 42 of the coil member 4 and the protrusion 523 of the magnet rotor 52 contact | abutted so that separation | separation is possible, it is not restricted to this, The protrusions 523 may be fixedly in contact with each other. However, in this case, it is necessary to set the pitch of the guide groove 21b (coil member 4) and the pitch of the drive female screw 21a (and the drive male screw 3a) to be the same. The same applies to the first embodiment.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. Of course, such modifications are included in the scope of the present invention as long as they have the configuration of the electric valve of the present invention.

(First embodiment)
DESCRIPTION OF SYMBOLS 1 Motorized valve 10 Valve main body 11 Valve seat part 11a Valve port 12 Valve chamber 20 Support member 21 Holder part 25 Guide rail 26 Valve closing lower limit stopper protrusion 26a Lower limit stopper surface (stopper contact surface)
27 Valve opening upper limit stopper projection (hook projection piece)
27a Upper limit stopper surface (stopper contact surface)
30 Rotor shaft 40 Valve body part 50 Coil member 51 Coil part 52 Claw part 60 Stepping motor 62 Magnet rotor 63 Stator coil (motor part)
67 ridge (nail receiving part)
67a, 67b Nail surface L axis (second embodiment)
DESCRIPTION OF SYMBOLS 1 Valve body 1A Valve seat part 1a Valve port 1b Valve chamber 2 Support member 21 Holder part 21a Drive female screw 21b Guide groove 21b1 Upper end of guide groove (end part of guide groove)
21b2 Valve opening side stopper contact surface 21b3 Lower end of guide groove (end of guide groove)
21b4 Valve closing side stopper contact surface 21c Coil member mounting groove 21c1 Lower end of coil member mounting groove (end on guide groove side)
21e Upper end of holder (one end of holder)
21f Outer peripheral surface of holder part 3 Rotor shaft 3a Drive male screw 32 Valve body part 4 Coil member 41 Coil part 41a One end of coil part 41b Other end of coil part 42 Claw part 5 Stepping motor (motor part)
52 Magnet rotor 523 Projection (claw receiving part)
100 motorized valve

Claims (9)

A valve body provided with a valve port provided inside and having a valve port that opens toward the valve chamber; a drive female screw disposed opposite to the valve port and spaced from the valve port and coaxial with the valve port axis; A cylindrical holder portion formed on the inner peripheral surface, a drive male screw paired with the drive female screw is formed on the outer peripheral surface, and the rotor shaft is screwed to the drive female screw, and the shaft of the rotor shaft In a motor-operated valve comprising: a valve body portion that moves forward and backward with respect to the valve port by movement in a direction; a magnet rotor fixed to the rotor shaft; and a motor portion that rotates the magnet rotor.
A coil member integrally including a coil portion made of a wire and a claw portion projecting radially outward of the coil portion;
A guide rail integrally formed with the holder part on the outer peripheral surface of the holder part so that the coil part of the coil member is screwed and the coil member is movable in the axial direction of the holder part by rotation thereof; With
In the vicinity of both end portions of the guide rail on the outer peripheral surface of the holder portion, there is a stopper contact surface formed so that any one end portion of the coil portion of the coil member hits and restricts rotation of the coil member. Provided,
When the coil member is rotated in accordance with the rotation of the magnet rotor, and any one end portion of the coil portion abuts against the corresponding stopper contact surface to restrict the rotation, the direction of the rotation is increased. A claw receiving portion with which the claw portion of the coil member abuts so as to restrict the rotation of the magnet rotor is integrally provided on the inner peripheral surface of the magnet rotor,
Electric valve the stopper abutting surface, characterized in that it is connected to the guide rails are formed to extend radially outwardly of the holder portion than the guide rail.   A valve body provided with a valve port provided inside and having a valve port that opens toward the valve chamber; a drive female screw disposed opposite to the valve port and spaced from the valve port and coaxial with the valve port axis; A cylindrical holder portion formed on the inner peripheral surface, a drive male screw paired with the drive female screw is formed on the outer peripheral surface, and the rotor shaft is screwed to the drive female screw, and the shaft of the rotor shaft In a motor-operated valve comprising: a valve body portion that moves forward and backward with respect to the valve port by movement in a direction; a magnet rotor fixed to the rotor shaft; and a motor portion that rotates the magnet rotor.
  A coil member integrally including a coil portion made of a wire and a claw portion projecting radially outward of the coil portion;
  A guide rail integrally formed with the holder part on the outer peripheral surface of the holder part so that the coil part of the coil member is screwed and the coil member is movable in the axial direction of the holder part by rotation thereof; With
  In the vicinity of both end portions of the guide rail on the outer peripheral surface of the holder portion, there is a stopper contact surface formed so that any one end portion of the coil portion of the coil member hits and restricts rotation of the coil member. Provided,
  When the coil member is rotated in accordance with the rotation of the magnet rotor, and any one end portion of the coil portion abuts against the corresponding stopper contact surface to restrict the rotation, the direction of the rotation is increased. A claw receiving portion with which the claw portion of the coil member abuts so as to restrict the rotation of the magnet rotor is integrally provided on the inner peripheral surface of the magnet rotor,
  The motor-operated valve characterized in that the stopper abutting surface is formed to have the same height from the outer peripheral surface of the holder portion as the height of the guide rail and is connected to the guide rail. The motor-operated valve according to claim 1 or 2 , wherein the stopper contact surface is formed in parallel to a radial direction and an axial direction of the holder portion. A hooking projecting piece formed on one end portion of the holder portion so as to project in the radial direction of the holder portion and for hooking a part of the coil portion of the coil member when the coil member is screwed to the guide rail. The motor-operated valve according to claim 1 , wherein the motor-operated valve is provided. A valve body provided with a valve port provided inside and having a valve port that opens toward the valve chamber; a drive female screw disposed opposite to the valve port and spaced from the valve port and coaxial with the valve port axis; A cylindrical holder portion formed on the inner peripheral surface, a drive male screw paired with the drive female screw is formed on the outer peripheral surface, and the rotor shaft is screwed to the drive female screw, and the shaft of the rotor shaft In a motor-operated valve comprising: a valve body portion that moves forward and backward with respect to the valve port by movement in a direction; a magnet rotor fixed to the rotor shaft; and a motor portion that rotates the magnet rotor.
A coil member integrally including a coil portion made of a wire and a claw portion projecting radially outward of the coil portion;
A guide groove formed integrally with the holder part on the outer peripheral surface of the holder part so that the coil part of the coil member is screwed and the coil member is movable in the axial direction of the holder part by rotation thereof; With
Both end portions of the guide groove are formed by being interrupted in the outer peripheral surface of the holder portion so as to restrict the rotation of the coil member when any one end portion of the coil portion of the coil member abuts.
When the coil member is rotated in accordance with the rotation of the magnet rotor, and any one end portion of the coil portion abuts against the corresponding end portion of the guide groove and the rotation is restricted, the rotation direction is changed. A motor-operated valve characterized in that a claw receiving portion with which the claw portion of the coil member abuts so as to restrict the rotation of the magnet rotor is provided on the inner peripheral surface of the magnet rotor. The motor-operated valve according to claim 5 , wherein stopper contact surfaces formed in parallel to a radial direction and an axial direction of the holder portion are provided at both end portions of the guide groove. The motor operated valve according to claim 5 or 6 , wherein one end portion of the holder portion is formed in a tapered shape. A coil member mounting groove formed integrally with the holder part on the outer peripheral surface of the holder part so that the coil member can be screwed;
The coil member mounting groove is provided nearer to the end of the holder part than the guide groove in the axial direction of the guide groove and the holder part,
End of the guide groove side of the coil member mounting groove, any one of claims 5-7, characterized in that it is arranged close at a one end and spacing of the guide grooves The motor-operated valve as described in. The motor-operated valve according to any one of claims 1 to 8 , wherein the number of turns of the coil member is at least one or more.

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