Power transmission device

Abstract

To provide a power transmission device capable of outputting drive force generated by a single drive source, by switching an output destination to an output shaft selected from multiple output shafts.SOLUTION: A power transmission device 1 comprises an input shaft 20, a first output shaft 40, a second output shaft 50, and an output shaft switching section 25. The input shaft 20 is rotated with input of drive force. The first output shaft 40 is rotated with the drive force transmitted through the input shaft 20. The second output shaft 50 is arranged at a position different from that of the first output shaft 40 and rotated with the drive force transmitted through the input shaft 20. The output shaft switching section 25 switches between a first output state and a second output state. The first output state restricts rotation of the second output shaft 50 with the drive force and allows the first output shaft 40 to rotate with the drive force. The second output state restricts the rotation of the first output shaft 40 with the drive force and allows the second output shaft 50 to rotate with the drive force.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a power transmission device capable of outputting a driving force generated by a single driving source to an output shaft. [Background technology]

[0002] Conventionally, a plurality of motor-operated valves are arranged in a fluid circuit to control the flow of a fluid through the circuit. A motor-operated valve is generally configured to transmit a driving force output from one driving source to one specific output shaft. A technology related to such a motor-operated valve is disclosed in Patent Document 1.

[0003] The motor-operated valve of Patent Document 1 is used as a dehumidification control valve or an electronic expansion valve in a refrigeration cycle, and the driving force generated by a stepping motor serving as a driving source is transmitted to a needle valve via various members to adjust the valve opening degree. That is, in the technology described in Patent Document 1, the driving force generated by one driving source is output to one specific output destination (i.e., the needle valve). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-34140 A Summary of the Invention [Problem to be solved by the invention]

[0005] Here, in Patent Document 1 as well, multiple motor-operated valves are arranged in one fluid circuit (i.e., a refrigeration cycle system). In recent years, there has been a demand for reducing the installation space of fluid circuits. In the case of the technology in Patent Document 1, each of the multiple motor-operated valves is configured to have one drive source and one output destination (valve body), making it difficult to reduce the space required for installing the fluid circuit.

[0006] In view of this, a configuration in which an integrated valve that can share a drive source is used in the fluid circuit is being considered as a measure to realize space saving for mounting the fluid circuit. In other words, there is a need for the development of a power transmission device that can switch the drive force generated by one drive source and output it to multiple output destinations.

[0007] In view of the above, an object of the present disclosure is to provide a power transmission device capable of switching the output destination of driving force generated by one driving source to one selected from a plurality of output shafts. [Means for solving the problem]

[0008] A power transmission device according to one embodiment of the present disclosure has an input shaft (20), a first output shaft (40), a second output shaft (50), and an output shaft switching unit (25). The input shaft rotates when a driving force is input. The first output shaft rotates when a driving force is transmitted from the input shaft. The second output shaft is disposed at a position different from the first output shaft, and rotates when a driving force is transmitted from the input shaft. The output shaft switching unit switches between a first output state and a second output state. The first output state limits the rotation of the second output shaft caused by the driving force, and allows the rotation of the first output shaft caused by the driving force. The second output state limits the rotation of the first output shaft caused by the driving force, and allows the rotation of the second output shaft caused by the driving force.

[0009] Therefore, according to the power transmission device, the output destination of the driving force generated by one driving source can be appropriately switched between the first output shaft and the second output shaft by switching between the first output state and the second output state by the output shaft switching unit. In other words, since the output of the first output shaft and the second output shaft can be realized by one driving source, the configuration using the power transmission device can be made compact.

[0010] In addition, in the first output state of the output shaft switching unit, rotation of the second output shaft by the driving force is restricted while rotation of the first output shaft by the driving force is permitted, and in the second output state, rotation of the first output shaft by the driving force is restricted while rotation of the second output shaft by the driving force is permitted.

[0011] In other words, in either the first output state or the second output state, the driving force is transmitted to the first output shaft and the second output shaft, regardless of whether they rotate. Therefore, according to the power transmission device, even when switching occurs by the output shaft switching unit, the output modes of the first output shaft and the second output shaft can be controlled with high precision.

[0012] In addition, the reference symbols in parentheses for each means described in this column and in the claims indicate the correspondence with the specific means described in the embodiments described later. [Brief description of the drawings]

[0013] [Figure 1] 1 is a configuration diagram of an integrated valve to which a power transmission device according to a first embodiment is applied. [Diagram 2] FIG. 2 is a schematic diagram of a refrigeration cycle including an integrated valve. [Diagram 3] FIG. 2 is a cross-sectional view taken along line III-III in FIG. [Figure 4] FIG. 2 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] FIG. 4 is an explanatory diagram showing a first output state of the integrated valve according to the first embodiment. [Figure 6] FIG. 4 is an explanatory diagram showing a second output state of the integrating valve according to the first embodiment. [Figure 7] FIG. 11 is a configuration diagram of an integrated valve to which a power transmission device according to a second embodiment is applied. [Figure 8] FIG. 11 is an explanatory diagram illustrating an output shaft switching unit according to a second embodiment. [Figure 9] FIG. 11 is a configuration diagram of an integrated valve to which a power transmission device according to a third embodiment is applied. [Figure 10] FIG. 11 is a configuration diagram of an integrated valve to which a power transmission device according to a fourth embodiment is applied. [Figure 11] 11 is a cross-sectional view taken along line XI-XI in FIG. 10. [Figure 12] 13 is an explanatory diagram showing the configuration of a reaction force generating portion according to a fourth embodiment. FIG. [Figure 13]FIG. 13 is a cross-sectional view showing a reaction force generating portion in a fourth embodiment. [Figure 14] FIG. 13 is an explanatory diagram showing a first output state of the integrating valve according to the fourth embodiment. [Figure 15] FIG. 13 is an explanatory diagram showing a second output state of the integrating valve according to the fourth embodiment. [Figure 16] FIG. 4 is a cross-sectional view showing a first modified example of the resistance generating portion in the present disclosure. [Figure 17] FIG. 11 is a cross-sectional view showing a second modified example of the reaction force generating portion in the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a number of embodiments for carrying out the present disclosure will be described with reference to the drawings. In each embodiment, the same reference numerals may be used to designate parts corresponding to matters described in the preceding embodiment, and duplicated descriptions may be omitted. In each embodiment, when only a part of the configuration is described, other embodiments described previously may be applied to the other parts of the configuration. In addition to combinations of parts that are specifically indicated as being possible in each embodiment, it is also possible to partially combine embodiments even if not indicated, as long as there is no particular problem with the combination.

[0015] (First embodiment) An embodiment to which a power transmission device according to the present disclosure is applied will be described with reference to Figs. 1 to 6. In the first embodiment, the power transmission device according to the present disclosure is applied to an integrated valve V that integrates a plurality of valve devices in a fluid circuit. As shown in Fig. 1, the integrated valve V is configured such that the power transmission device 1 switches the output destination of the driving force output by the drive motor 11 between the first pressure reduction section VA side and the second pressure reduction section VB side for transmission.

[0016] As shown in FIG. 2, the first pressure reduction section VA and the second pressure reduction section VB in the first embodiment constitute an integrated valve V having a function of integrating two expansion valves connected in parallel to each other in a refrigeration cycle 100, which is a vapor compression type refrigeration cycle.

[0017] Specifically, the configuration of the refrigeration cycle 100 according to the first embodiment will be described with reference to Fig. 2. The refrigeration cycle 100 has a compressor 110, a condenser 111, a first pressure reduction section VA, a second pressure reduction section VB, a first evaporator 113, and a second evaporator 114.

[0018] In the first embodiment, the compressor 110 is an electric compressor that draws in, compresses, and discharges a refrigerant. The refrigeration cycle 100 is a subcritical cycle in which the high-pressure side refrigerant pressure does not exceed the critical pressure of the refrigerant, and a fluorocarbon refrigerant (e.g., R134a) is used as the refrigerant circulating in the vapor compression refrigeration cycle.

[0019] The condenser 111 condenses the refrigerant by dissipating heat from the refrigerant discharged from the compressor 110. A refrigerant branching section 112 is disposed on the refrigerant outlet side of the condenser 111. The refrigerant branching section 112 branches the flow of the refrigerant flowing out from the condenser 111 into a refrigerant flow toward the first pressure reduction section VA side and a refrigerant flow toward the second pressure reduction section VB side.

[0020] The first pressure reduction section VA constitutes a part of the integrated valve V according to the first embodiment, and reduces the pressure of a part of the refrigerant condensed in the condenser 111. A first evaporator 113 is connected to the downstream side of the refrigerant flow in the first pressure reduction section VA. The first evaporator 113 causes the refrigerant decompressed in the first pressure reduction section VA to absorb external heat and evaporate the refrigerant.

[0021] The second pressure reduction section VB constitutes a part of the integrating valve V, similar to the first pressure reduction section VA, and reduces the pressure of another part of the refrigerant condensed in the condenser 111. A second evaporator 114 is connected to the downstream side of the refrigerant flow in the second pressure reduction section VB. The second evaporator 114 causes the refrigerant decompressed in the second pressure reduction section VB to absorb external heat, thereby evaporating the refrigerant.

[0022] A refrigerant junction 115 is connected to the downstream side of the refrigerant flow of the first evaporator 113 and the downstream side of the refrigerant flow of the second evaporator 114. The refrigerant junction 115 joins the refrigerant flow out of the first evaporator 113 and the refrigerant flow out of the second evaporator 114, and causes the refrigerant to flow out to the suction port side of the compressor 110.

[0023] 2, the integrating valve V according to the first embodiment is configured by integrating the parts from the inlet side of the refrigerant branching section 112 to the outlet sides of the first pressure reduction section VA and the second pressure reduction section VB in the refrigeration cycle 100. That is, the integrating valve V has the function of the refrigerant branching section 112, the function of the first pressure reduction section VA, and the function of the second pressure reduction section VB.

[0024] Next, a specific configuration of the integrated valve V according to the first embodiment will be described with reference to the drawings. As shown in Fig. 1, the integrated valve V has a drive unit 10 that generates a driving force, and a main body unit 30 having a refrigerant flow path including a first pressure reducing unit VA and a second pressure reducing unit VB, and includes a power transmission device 1 according to the present disclosure. The power transmission device 1 transmits the rotational driving force generated by the drive unit 10 by switching between the first pressure reducing unit VA side and the second pressure reducing unit VB side using a magnetic force.

[0025] Here, the integrated valve V is disposed vertically in the refrigeration cycle 100. The vertical arrangement means that the axial directions of the valve bodies in the first pressure reducing section VA and the second pressure reducing section VB are substantially parallel to the direction of gravity, and the drive section 10 is disposed above the main body section 30.

[0026] 1, the drive unit 10 constitutes the upper portion of the integrated valve V, and is adjacent to the upper surface of the main body 30. The drive unit 10 has a drive motor 11 that generates a rotational drive force by supplying electric power, an input shaft 20 to which the drive force generated by the drive motor 11 is input, and an output shaft switching unit 25 for switching the output destination of the drive force input from the input shaft 20.

[0027] The drive motor 11 is a motor that can be driven by position feedback control, and has a rotor 12, a stator 13, and a shaft 14. As the drive motor 11, for example, a three-phase brushless motor, a stepping motor, or the like can be adopted.

[0028] The shaft 14 is rotatably supported by a motor holding plate 15 that constitutes the upper surface of the integrated valve V. The rotor 12 is attached to the shaft 14 and rotates integrally with the rotor 12. The shaft 14 is the output shaft of the drive motor 11 and also constitutes a part of the input shaft of the power transmission device 1.

[0029] The stator 13 is fixed to a motor case or a motor holding plate 15 (not shown), and has a stator coil. The rotor 12 is cylindrical, and the stator 13 is disposed inside the rotor 12. The rotor 12 has a plurality of pairs of magnets, each of which has an N pole and an S pole, disposed along the circumferential direction. For example, the rotor 12 may have four N poles and four S poles disposed on its circumferential surface, and the number of poles Pr of the rotor 12 may be eight. The stator 13 and the rotor 12 output a driving force that rotates the shaft 14 by electromagnetic force.

[0030] The motor holding plate 15 is disposed in the central portion of the output shaft switching unit 25 that is disposed in an annular shape in the upper portion of the integrated valve V. As described above, the motor holding plate 15 rotatably supports the shaft 14 of the drive motor 11.

[0031] The drive unit 10 houses a circuit unit (not shown). The circuit unit has a circuit board on which a plurality of electronic components for controlling the drive motor 11 are mounted. Furthermore, the circuit unit can execute control related to the switching operation of the output shaft in the integrated valve V (i.e., control of the output shaft switching unit 25).

[0032] An input shaft 20 is joined to the lower end of the shaft 14 of the drive motor 11. The input shaft 20 is attached so that its axis coincides with an extension of the rotation axis of the shaft 14. Therefore, when the drive motor 11 is driven, the input shaft 20 rotates integrally with the rotor 12 and the shaft 14.

[0033] An input magnet 21 is formed on the lower end of the input shaft 20. As described above, the input shaft 20 rotates together with the rotor 12 and the like when the rotational driving force generated by the drive motor 11 is input to the input shaft 20. Since the input magnet 21 is formed integrally with the input shaft 20, it rotates in response to the input of the rotational driving force generated by the drive motor 11.

[0034] 1 and 3, the input magnet 21 is formed in a disk shape at the lower end of the input shaft 20, and at least one pair of magnets consisting of an N pole 21N and an S pole 21S is arranged along the circumferential direction on its side (i.e., the outer circumferential surface of the disk shape). In this example, there is one N pole 21N and one S pole 21S, so the number of poles Pin of the input magnet 21 is two.

[0035] In the upper portion of the integrated valve V, the output shaft switching unit 25 is disposed so as to surround the periphery of the drive motor 11. As described above, the output shaft switching unit 25 is configured to switch the output destination of the rotational drive force generated by the drive motor 11 to either the first output shaft 40 or the second output shaft 50, and has a switching coil 26 and a switching yoke 27.

[0036] The switching coil 26 is a DC coil arranged in an annular shape on the partition wall 36 that constitutes the upper surface of the integrated valve V. The switching coil 26 can switch between flowing a current in a predetermined direction and flowing a current in the opposite direction.

[0037] The switching yoke 27 is a yoke made of a magnetic material configured to connect the inner diameter side and the outer diameter side of the annular switching coil 26 via the upper part of the switching coil 26. The switching yoke 27 can also be said to be an iron annular member having a groove shape with an open lower side. In this case, the switching coil 26 is disposed inside the groove shape.

[0038] When a magnetic field is generated by passing a direct current through the switching coil 26 configured in this manner, magnetic forces of different polarities are generated at the inner diameter side end and the outer diameter side end of the switching yoke 27. In the following description, the outer diameter side end of the switching coil 26 is referred to as a first magnetic force generating section 27A, and the inner diameter side end of the switching coil 26 is referred to as a second magnetic force generating section 27B.

[0039] When a current flows through the switching coil 26, a magnetic field is generated in the switching coil 26, causing a magnetic force to be generated in each of the first magnetic force generation unit 27A and the second magnetic force generation unit 27B. The polarities of the magnetic forces generated in the first magnetic force generation unit 27A and the second magnetic force generation unit 27B are controlled by the direction of the current flowing through the switching coil 26.

[0040] For example, when a current is passed through the switching coil 26 in a predetermined direction, the magnetic force generated in the first magnetic force generation unit 27A indicates an S pole, and the magnetic force generated in the second magnetic force generation unit 27B indicates an N pole. When a current is passed through the switching coil 26 in a direction opposite to the predetermined direction, the magnetic force generated in the first magnetic force generation unit 27A indicates an N pole, and the magnetic force generated in the second magnetic force generation unit 27B indicates an S pole.

[0041] Furthermore, since the first magnetic force generating unit 27A and the second magnetic force generating unit 27B are each attached so as to be in contact with the upper surface of the partition wall 36, the magnetic force generated by passing current through the switching coil 26 can be applied to the lower part of the partition wall 36.

[0042] 1, a partition wall 36 is disposed below the drive unit 10 including the drive motor 11, the input shaft 20, and the output shaft switching unit 25. The partition wall 36 is a sealing member that divides a space on the drive unit 10 side of the integrated valve V and the power transmission device 1 from a space on the main body 30 side including the first output shaft 40 and the like, and seals the space on the main body 30 side.

[0043] Since the space on the main body 30 side includes a space through which the refrigerant circulating in the refrigeration cycle 100 in the integrated valve V flows, the partition 36 prevents the refrigerant (high-pressure refrigerant) flowing through the main body 30 side from leaking into the space on the drive unit 10 side.

[0044] The partition 36 is formed, for example, as a non-magnetic material or a member having a predetermined magnetic permeability. Specifically, the partition 36 is formed of stainless steel obtained by transforming an austenitic stainless steel, such as SUS304, aluminum, or SUS305, into martensite by work hardening to impart magnetism to the stainless steel.

[0045] As described above, the partition wall 36 is joined to the upper surface of the main body portion 30 and seals the space formed inside the main body portion 30. That is, the partition wall 36 and the main body portion 30 form a pressure vessel having pressure resistance.

[0046] 1, the partition wall 36 is formed in a disk shape with a central portion recessed downward, and has a cylindrical sealing portion 36A, a bottom sealing portion 36B, and an outer sealing edge portion 36C. In the partition wall 36 according to the first embodiment, the cylindrical sealing portion 36A, the bottom sealing portion 36B, and the outer sealing edge portion 36C are integrally formed in order to improve pressure resistance.

[0047] The sealing cylindrical portion 36A is a cylindrical portion that constitutes the side surface of the portion recessed downward in the center of the partition wall 36. The sealing cylindrical portion 36A is located on the outer diameter side of the input side magnet 21, as shown in Figs.

[0048] The sealing bottom portion 36B is located below the input-side magnet 21 and closes the lower side of the sealing cylindrical portion 36A. This separates the internal space of the sealing cylindrical portion 36A from the space on the main body portion 30 side. The sealing outer edge portion 36C is a plate-shaped portion formed at the upper end of the sealing cylindrical portion 36A so as to expand radially outward. The sealing outer edge portion 36C is fixed to the upper surface of the main body portion 30.

[0049] The sealing bottom portion 36B may be formed in a disk shape with the center curved downward. Also, the corners forming the boundary between the sealing cylindrical portion 36A and the sealing bottom portion 36B may be rounded with a predetermined radius of curvature instead of a right angle. By adopting these shapes and processes, the pressure resistance of the partition wall 36 can be improved.

[0050] 1, the main body 30 constituting the lower part of the integrated valve V has a mechanism accommodating section 35 accommodating various mechanisms for realizing the pressure reducing functions of the first pressure reducing section VA and the second pressure reducing section VB, and a flow path forming section 60 in which a refrigerant flow path is formed through which the refrigerant of the refrigeration cycle 100 flows. The mechanism accommodating section 35 is disposed in the upper part of the main body 30, and the flow path forming section 60 constitutes the lower part of the main body 30. The internal space formed in the main body 30 (i.e., the mechanism accommodating section 35 and the partition wall 36) corresponds to an example of an accommodating space.

[0051] As described above, the mechanism housing section 35 of the integrated valve V houses various components for realizing the pressure reduction function of the first pressure reduction section VA and various components for realizing the pressure reduction function of the second pressure reduction section VB.

[0052] The various members for realizing the pressure reduction function of the first pressure reduction section VA include a first output shaft 40, a first bearing member 47, a first screw member 48, and a first valve body 49. The various members for realizing the pressure reduction function of the second pressure reduction section VB include a second output shaft 50, a second bearing member 57, a second screw member 58, and a second valve body 59.

[0053] The first output shaft 40 of the integrated valve V in the first embodiment is an output shaft that rotates by the rotational driving force generated in the drive unit 10 and outputs the rotational driving force to the first valve body 49 that constitutes the first pressure reduction section VA.

[0054] 1, the first output shaft 40 is disposed so as to have a rotation axis on an extension line of the rotation axes of the shaft 14 and the input shaft 20, and has a large diameter portion 41 and a small diameter portion 42. The rotation axis of the first output shaft 40 is also disposed so as to coincide with the center of the output shaft switching portion 25 formed in an annular shape.

[0055] The large diameter portion 41 is formed in a cylindrical shape and constitutes an upper portion of the first output shaft 40. Therefore, the large diameter portion 41 is accommodated in the mechanism accommodating portion 35 of the main body 30. The inner diameter dimension of the large diameter portion 41 is formed to be larger than at least the outer diameter dimension of the sealing cylindrical portion 36A of the partition wall 36. In addition, the diameter dimension of the large diameter portion 41 is formed to be the same as the diameter dimension of the first magnetic force generating portion 27A in the output shaft switching portion 25.

[0056] An output-side magnet 45 is disposed on the upper portion of the large diameter portion 41. As shown in Figs. 1 and 3, the output-side magnet 45 is formed in a cylindrical shape like the large diameter portion 41, and is configured by arranging a plurality of pairs of magnets, each consisting of an N pole 45N and an S pole 45S, at approximately equal intervals along the circumferential direction. In this example, there are 20 N poles 45N and 20 S poles 45S, so the number of poles Pf of the output-side magnet 45 is 40. The output-side magnet 45 has a different number of poles from the input-side magnet 21, and can be said to be a multi-pole magnet with a greater number of poles than the input-side magnet 21.

[0057] As described above, the input side magnet 21 of the input shaft 20 is disposed on the inner diameter side of the sealed cylindrical portion 36A of the partition wall 36. The output side magnet 45 is disposed on the outer diameter side of the sealed cylindrical portion 36A. As shown in Figs. 1 and 3, the output side magnet 45 is disposed so as to face the input side magnet 21 via the sealed cylindrical portion 36A of the partition wall 36. Therefore, the rotational driving force input to the input shaft 20 can be transmitted to the first output shaft 40 by the magnetic force acting between the input side magnet 21 and the output side magnet 45.

[0058] A first switching magnet 46 is disposed on the upper end surface of the large diameter portion 41. The first switching magnet 46 is disposed so that the upper side shows either an S pole or an N pole (for example, an S pole), and is annular in shape with the same diameter as the large diameter portion 41. Therefore, as shown in FIG. 1, the first switching magnet 46 disposed on the upper end of the large diameter portion 41 faces the first magnetic force generating portion 27A of the output shaft switching portion 25 via the sealing outer edge portion 36C of the partition wall 36. This allows the magnetic force generated in the first magnetic force generating portion 27A of the output shaft switching portion 25 to act on the first switching magnet 46, thereby controlling the operation of the first output shaft 40.

[0059] The small diameter portion 42 of the first output shaft 40 is formed in a cylindrical shape with a smaller diameter than the large diameter portion 41, and extends downward from the lower portion of the large diameter portion 41. The second output shaft 50 described later and the like are disposed inside the small diameter portion 42.

[0060] A first valve body 49 is disposed at the lower end of the small diameter portion 42. The first valve body 49 corresponds to the valve body in the first pressure reduction section VA, and is formed in a cylindrical shape with an outer diameter dimension smaller than the inner diameter of the small diameter portion 42.

[0061] 1 and 4, a groove 43 is formed at the lower end of the small diameter portion 42. The groove 43 is configured by depressing the inner surface of the cylindrical small diameter portion 42 in a groove shape, and extends upward from the lower end edge of the small diameter portion 42.

[0062] A protruding portion 49A is formed on the upper end side of the first valve body 49. The protruding portion 49A is formed by protruding the outer surface of the cylindrical first valve body 49 radially outward, and extends downward from the upper end edge of the first valve body 49. The outer diameter dimension of the protruding portion 49A is smaller than the inner dimension of the groove portion 43. Therefore, the protruding portion 49A of the first valve body 49 can be fitted into the groove portion 43 of the small diameter portion 42. At this time, a certain gap is provided between the inner surface of the groove portion 43 and the outer surface of the protruding portion 49A.

[0063] As a result, the groove 43 and the protrusion 49A cooperate with each other to rotate the first valve body 49 in accordance with the rotational movement of the first output shaft 40, and the rotational driving force transmitted to the first output shaft 40 can be transmitted to the first valve body 49. Furthermore, the groove 43 and the protrusion 49A cooperate with each other to move the first output shaft 40 in the rotational axis direction (i.e., the up-down direction) relative to the first valve body 49.

[0064] 1, a first bearing member 47 is disposed in the lower portion of the mechanism housing portion 35 formed in the main body portion 30. The first bearing member 47 is fixed to the lower portion of the mechanism housing portion 35 of the main body portion 30, and rotatably supports the first output shaft 40. In addition, the first bearing member 47 allows the first output shaft 40 to move up and down within a predetermined range.

[0065] A first screw member 48 is disposed below the first bearing member 47. The first screw member 48 is fixed inside a first valve chamber 65 that constitutes the flow passage forming portion 60 of the main body 30, and has a threaded hole. A female thread is formed inside the threaded hole of the first screw member 48, and a male thread is formed on the outer circumferential surface of the first valve body 49.

[0066] The male thread of the first valve body 49 is screwed into a threaded hole formed in the first screw member 48 to form a screw mechanism. As a result, when the first valve body 49 rotates, the first valve body 49 becomes movable in the direction of the rotation axis, making it possible to adjust the opening degree of the first pressure reducing section VA.

[0067] The second output shaft 50 of the integrated valve V is an output shaft that rotates by the rotational driving force generated in the drive unit 10 and outputs the rotational driving force to the second valve body 59 that constitutes the second pressure reduction unit VB.

[0068] 1, the second output shaft 50 is disposed so as to have a rotation axis on an extension line of the rotation axes of the shaft 14 and the input shaft 20 described above, and has a cylindrical portion 51 and a shaft portion 52. The rotation axis of the second output shaft 50 is disposed so as to coincide with the center of the output shaft switching portion 25 formed in an annular shape, and also coincides with the rotation axis of the first output shaft 40.

[0069] The cylindrical portion 51 is formed in a cylindrical shape and constitutes an upper portion of the second output shaft 50. The cylindrical portion 51 is disposed on the inner diameter side of the second output shaft 50 and is located on the outer diameter side of the sealing cylindrical portion 36A of the partition wall 36. Therefore, the cylindrical portion 51 is accommodated in the mechanism accommodating portion 35 of the main body 30. The cylindrical portion 51 is formed so as to have the same diameter dimension as the second magnetic force generating portion 27B of the output shaft switching portion 25.

[0070] A magnetic flux modulation section 55 is disposed on the upper portion of the cylindrical section 51. The magnetic flux modulation section 55 is a magnetic modulation section that modulates the magnetic flux between the input-side magnet 21 and the output-side magnet 45, and is formed integrally with the second output shaft 50.

[0071] 1 and 3, the magnetic flux modulation section 55 is formed in a cylindrical shape like the cylindrical section 51, and has a plurality of magnetic sections 55A and a plurality of non-magnetic sections 55B. The magnetic sections 55A and the non-magnetic sections 55B are frustum-shaped, and the magnetic sections 55A are arranged side by side at approximately equal intervals along the circumferential direction. The non-magnetic sections 55B are disposed between the magnetic sections 55A. For example, the magnetic sections 55A are formed of a soft magnetic material (e.g., an iron-based metal), and the non-magnetic sections 55B are formed of a non-magnetic material (e.g., stainless steel or resin).

[0072] The number of poles Pp of the magnetic flux modulation unit 55 is the same as the sum of the number of poles Pin of the input-side magnet 21 and the number of poles Pf of the output-side magnet 45. In the first embodiment, the number of poles Pin of the input-side magnet 21 is 2, and the number of poles Pf of the output-side magnet 45 is 40, so the number of poles Pp of the magnetic flux modulation unit 55 is 42. That is, the magnetic flux modulation unit 55 is configured using 21 magnetic portions 55A and 21 non-magnetic portions 55B.

[0073] As described above, the input side magnet 21 of the input shaft 20 is disposed on the inner diameter side of the sealed cylindrical portion 36A of the partition wall 36. The output side magnet 45 of the first output shaft 40 is disposed radially outward of the magnetic flux modulation portion 55 of the second output shaft 50. As shown in Figs. 1 and 3, the magnetic flux modulation portion 55 is disposed so as to face the input side magnet 21 and the output side magnet 45 via the sealed cylindrical portion 36A of the partition wall 36. Therefore, the magnetic flux modulation portion 55 can modulate the magnetic flux acting between the input side magnet 21 and the output side magnet 45.

[0074] When the rotation of the second output shaft 50 is stopped, the rotational driving force input to the input shaft 20 can be transmitted to the second output shaft 50 by the magnetic force acting between the input side magnet 21, the output side magnet 45, and the magnetic flux modulation section 55.

[0075] A second switching magnet 56 is disposed on the upper end surface of the cylindrical portion 51. The second switching magnet 56 is disposed so that the upper side shows either an S pole or an N pole (for example, an S pole), and has an annular shape with the same diameter as the cylindrical portion 51. The second switching magnet 56 is disposed so that the polarity shown by the upper surface of the second switching magnet 56 shows the same polarity as the upper surface of the first switching magnet 46.

[0076] 1, the second switching magnet 56 disposed at the upper end of the cylindrical portion 51 faces the second magnetic force generating portion 27B of the output shaft switching portion 25 via the sealed outer edge portion 36C of the partition wall 36. This allows the magnetic force generated in the second magnetic force generating portion 27B of the output shaft switching portion 25 to act on the second switching magnet 56, thereby making it possible to control the operation of the second output shaft 50.

[0077] The shaft portion 52 of the second output shaft 50 is an axially shaped portion extending downward from the lower portion of the cylindrical portion 51, and is formed integrally with the cylindrical portion 51. As described above, the shaft portion 52 is inserted into the inside of the small diameter portion 42 of the first output shaft 40, which is formed into a cylindrical shape. A second valve body 59 is disposed at the lower end of the shaft portion 52. The second valve body 59 corresponds to the valve body in the second pressure reducing section VB, and constitutes the valve body of a so-called needle valve.

[0078] 1, an insertion hole 52A is formed in the lower end of the shaft portion 52. The insertion hole 52A is drilled to extend axially upward from the lower end of the shaft portion 52 so as to include the rotation axis of the second output shaft 50.

[0079] A protruding piece 59A is formed on the upper end side of the second valve body 59. The protruding piece 59A protrudes so as to extend upward from the upper end of the second valve body 59 along the rotation axis of the second valve body 59. The outer diameter dimension of the protruding piece 59A is formed to be smaller than the inner diameter of the insertion hole 52A formed in the shaft portion 52. Therefore, the protruding piece 59A of the second valve body 59 can be inserted into the insertion hole 52A of the shaft portion 52, and the protruding piece 59A of the second valve body 59 can be engaged with the insertion hole 52A of the shaft portion 52. At this time, a predetermined interval can be provided between the inner surface of the insertion hole 52A and the outer surface of the protruding piece 59A.

[0080] As a result, the insertion hole 52A and the protruding piece 59A cooperate with each other to rotate the second valve body 59 in accordance with the rotational movement of the second output shaft 50, and the rotational driving force transmitted to the second output shaft 50 can be transmitted to the second valve body 59. Furthermore, the insertion hole 52A and the protruding piece 59A cooperate with each other to move the second output shaft 50 in the rotational axis direction (i.e., the up-down direction) relative to the second valve body 59.

[0081] 1, a second bearing member 57 is disposed below the mechanism housing portion 35 formed in the main body portion 30 and above the first bearing member 47. The second bearing member 57 is fixed to the main body portion 30 between the first output shaft 40 and the second output shaft 50, and rotatably supports the second output shaft 50. In addition, the second bearing member 57 allows the second output shaft 50 to move up and down within a predetermined range.

[0082] A second screw member 58 is disposed below the second bearing member 57, the first bearing member 47, and the first screw member 48. The second screw member 58 is fixed inside a second valve chamber 67 located below the first valve chamber 65, and has a screw hole. A female screw shape is formed inside the screw hole of the second screw member 58, and a male screw shape is formed on the outer circumferential surface of a second valve body 59.

[0083] The male thread of the second valve body 59 is screwed into a threaded hole formed in the second screw member 58 to form a screw mechanism. As a result, when the second valve body 59 rotates, the second valve body 59 becomes movable in the direction of the rotation axis, making it possible to adjust the opening degree in the second pressure reducing section VB.

[0084] 1, a flow path forming portion 60 is disposed in a lower portion of the main body portion 30 of the integrated valve V. The flow path forming portion 60 is a portion in which a refrigerant flow path 62 for causing the refrigerant circulating through the refrigeration cycle 100 to flow in and out of the first pressure reducing portion VA and the second pressure reducing portion VB in the integrated valve V is formed.

[0085] The main body 30 in the first embodiment constitutes the body portion (i.e., part of the housing) of the integrated valve V, and is formed from a casting material (e.g., AC4C) using an Al-Si-Mg based aluminum alloy.

[0086] An inlet 61, a first outlet 63, and a second outlet 64 are formed in the flow path forming portion 60 of the main body 30, and a refrigerant flow path 62 is formed to connect these. The inlet 61 is formed in the left side surface of the main body 30. As shown in Fig. 2, in the integrated valve V according to the first embodiment, the inlet 61 is connected to the outlet side of the condenser 111 of the refrigeration cycle 100.

[0087] A first outlet 63 and a second outlet 64 are formed on the right side surface of the main body 30. On the right side surface of the main body 30, the first outlet 63 is formed above the second outlet 64. As shown in Fig. 2, the first outlet 63 is connected to the refrigerant inlet side of the first evaporator 113 in the refrigeration cycle 100, and the second outlet 64 is connected to the refrigerant inlet side of the second evaporator 114 in the refrigeration cycle 100.

[0088] 1, in the main body 30, a first valve chamber 65 and a second valve chamber 67 are formed between the inlet 61 and the first outlet 63 and second outlet 64. The first valve chamber 65 is a valve chamber that houses the first valve body 49 and the like constituting the first pressure reducing section VA, and is formed below the mechanism housing section 35. The first valve chamber 65 communicates with the mechanism housing section 35 located above.

[0089] A first screw member 48 is fixed to the first valve chamber 65. Therefore, the first valve body 49 moves in the rotation axis direction inside the first valve chamber 65 by a screw mechanism formed in cooperation with the first screw member 48.

[0090] A first valve seat 66 is formed at the bottom of the first valve chamber 65, which is contactable with the first valve body 49 that moves up and down. The integrated valve V can adjust the throttle opening of the first pressure reduction section VA by adjusting the relative positional relationship of the first valve body 49 with respect to the first valve seat 66. A refrigerant flow path 62 extending toward the first outlet 63 is connected to the first valve chamber 65 near the first valve seat 66.

[0091] The second valve chamber 67 is a valve chamber that houses the second valve body 59 and other components that constitute the second pressure reducing section VB, and is formed below the first valve chamber 65. The second valve chamber 67 communicates with the first valve chamber 65 located above.

[0092] A second screw member 58 is fixed to the second valve chamber 67. Therefore, the second valve body 59 moves in the rotation axis direction inside the second valve chamber 67 by a screw mechanism formed in cooperation with the second screw member 58.

[0093] A second valve seat 68 that can come into contact with the second valve body 59 that moves up and down is formed at the bottom of the second valve chamber 67. The integrated valve V can adjust the throttle opening of the second pressure reduction section VB by adjusting the relative positional relationship of the second valve body 59 with respect to the second valve seat 68. A refrigerant flow path 62 that extends toward the second outlet 64 is connected to the second valve chamber 67 near the second valve seat 68.

[0094] In the integrating valve V, a refrigerant branching section 112 in the refrigeration cycle 100 is formed by a portion where the first valve chamber 65 and the second valve chamber 67 communicate with each other.

[0095] In the integrated valve V configured in this manner, the power transmission device 1 adjusts the amount of pressure reduction by switching between a first output state in which the amount of pressure reduction of the first pressure reduction section VA can be adjusted via the first output shaft 40, and a second output state in which the amount of pressure reduction of the second pressure reduction section VB can be adjusted via the second output shaft 50.

[0096] Hereinafter, the switching operation of the integrating valve V to the first output state and the second output state and the adjustment operation of the pressure reduction amount will be described with reference to the drawings.

[0097] First, the first output state of the integrated valve V and the power transmission device 1 will be described with reference to Fig. 5. The first output state is a state in which the drive motor 11 and the output shaft switching unit 25 are controlled in operation to permit the first output shaft 40 to output driving force, while restricting the second output shaft 50 from outputting driving force.

[0098] Specifically, when switching to the first output state, a direct current is passed through the switching coil 26 of the output shaft switching unit 25 in a predetermined direction. By passing a direct current in the predetermined direction, a magnetic field is generated in the switching coil 26, and a magnetic force is generated at each end of the switching yoke 27 in the output shaft switching unit 25. In the first output state, the polarity of the magnetic force generated in the first magnetic force generating unit 27A indicates an S pole, and the polarity of the magnetic force generated in the second magnetic force generating unit 27B indicates an N pole.

[0099] The magnetic forces generated in the first magnetic force generating unit 27A and the second magnetic force generating unit 27B act on the components of the mechanism accommodating unit 35 through the sealing outer edge portion 36C of the partition wall 36. As shown in Fig. 1 etc., the first magnetic force generating unit 27A faces the first switching magnet 46 through the sealing outer edge portion 36C, and the second magnetic force generating unit 27B faces the second switching magnet 56 through the sealing outer edge portion 36C.

[0100] As described above, the first switching magnet 46 is attached to the first output shaft 40 so that the upper side presents the S pole. Therefore, in the first output state, when a magnetic force is generated in the first magnetic force generating unit 27A, the first switching magnet 46 moves downward along the axial direction of the first output shaft 40, etc., away from the output shaft switching unit 25, repelling the magnetic force.

[0101] On the other hand, the second switching magnet 56 is also attached to the second output shaft 50 so that the upper side thereof presents the south pole. For this reason, in the first output state, when a magnetic force is generated in the second magnetic force generating unit 27B, the second output shaft 50 is attracted by the magnetic force, and the second output shaft 50 moves upward along the axial direction of the second output shaft 50, etc. As a result, the upper end surface of the second output shaft 50 is brought into close contact with the sealed outer edge portion 36C of the partition wall 36 by the magnetic force of the second magnetic force generating unit 27B.

[0102] When the drive motor 11 is driven in this state, the rotational drive force generated by the drive motor 11 is transmitted to the first output shaft 40 and the second output shaft 50 due to magnetic interaction between the input side magnet 21, the magnetic flux modulation unit 55, and the output shaft switching unit 25.

[0103] In the first output state, the second output shaft 50 is attracted toward the output shaft switching unit 25 by the magnetic force generated in the second magnetic force generating unit 27B, and is in close contact with the partition wall 36. Therefore, as a resistance to the rotational driving force transmitted from the drive motor 11 to the second output shaft 50, the magnetic force generated in the second magnetic force generating unit 27B and the frictional force generated between the partition wall 36 and the second output shaft 50 act.

[0104] Here, in the first output state, the relationship between the driving force transmitted to the second output shaft 50 and the resistance caused by the output shaft switching unit 25, etc. is set so that the resistance caused by the output shaft switching unit 25, etc. is greater than the driving force transmitted to the second output shaft 50. Therefore, in the first output state, the second output shaft 50 is in a state in which the driving force generated by the drive motor 11 is transmitted, but its rotation is hindered by the resistance caused by the output shaft switching unit 25, etc.

[0105] On the other hand, in the first output state, the first output shaft 40 is moved away from the output shaft switching unit 25 by the magnetic force generated in the first magnetic force generating unit 27A, and is separated from the partition wall 36. For this reason, no magnetic force or frictional force acts as a resistance to the rotational driving force transmitted from the drive motor 11 to the first output shaft 40.

[0106] For this reason, in the first output state, the rotation by the driving force transmitted to the first output shaft 40 is not hindered by the resistance caused by the output shaft switching unit 25, etc. Therefore, in the first output state, the first output shaft 40 receives the driving force generated by the drive motor 11 and is in a state where it can output the driving force to the first valve body 49, which is the output destination.

[0107] 5, when the drive motor 11 is driven, the rotational drive force generated by the drive motor 11 is transmitted to the first output shaft 40 and the second output shaft 50 by magnetic interaction between the input side magnet 21, the magnetic flux modulation unit 55, and the output shaft switching unit 25. At this time, the second output shaft 50 remains stopped due to the magnetic force of the output shaft switching unit 25, etc., but the first output shaft 40 rotates at a reduced speed at a predetermined reduction ratio relative to the rotation of the drive motor 11. In the first embodiment, the reduction ratio is 20 due to the configuration of the input side magnet 21, the magnetic flux modulation unit 55, and the output side magnet 45.

[0108] In this way, according to the integrated valve V of the first embodiment, by operating the drive motor 11 in the first output state, it is possible to move the first output shaft 40 and the first valve body 49. That is, by controlling the rotation direction of the drive motor 11 in the first output state, it is possible to move the first valve body 49 closer to or away from the first valve seat 66, thereby realizing adjustment of the throttle opening of the first pressure reducing section VA.

[0109] Next, the second output state of the integrated valve V and the power transmission device 1 will be described with reference to Fig. 6. The second output state is a state in which the drive motor 11 and the output shaft switching unit 25 are controlled in operation to permit the second output shaft 50 to output driving force, while restricting the first output shaft 40 from outputting driving force.

[0110] Specifically, when switching to the second output state, a direct current is passed through the switching coil 26 of the output shaft switching unit 25 in the direction opposite to the predetermined direction in the first output state. By passing a direct current, a magnetic field is generated in the switching coil 26, and a magnetic force is generated at each end of the switching yoke 27 in the output shaft switching unit 25. In the second output state, since a direct current is passed in the direction opposite to the predetermined direction, the polarity of the magnetic force generated in the first magnetic force generating unit 27A indicates an N pole, and the polarity of the magnetic force generated in the second magnetic force generating unit 27B indicates an S pole.

[0111] As explained in the first output state, the magnetic forces generated in the first magnetic force generating unit 27A and the second magnetic force generating unit 27B act on the first switching magnet 46 and the second switching magnet 56 through the sealing outer edge portion 36C of the partition wall 36.

[0112] As described above, since the first switching magnet 46 is attached to the first output shaft 40 so that the upper side presents the S pole, when a magnetic force is generated in the first magnetic force generating unit 27A in the second output state, the first switching magnet 46 is attracted to the output shaft switching unit 25 by the magnetic force. As a result, the upper end surface of the first output shaft 40 moves in the axial direction of the first output shaft 40 by the magnetic force of the first magnetic force generating unit 27A and comes into close contact with the sealed outer edge portion 36C of the partition wall 36.

[0113] On the other hand, the second switching magnet 56 is also attached to the second output shaft 50 so that the upper side presents the south pole. Therefore, in the second output state, when a magnetic force is generated in the second magnetic force generating unit 27B, the second switching magnet 56 repels the magnetic force and moves in the axial direction away from the output shaft switching unit 25.

[0114] When the drive motor 11 is driven even in the second output state, the rotational drive force generated by the drive motor 11 is transmitted to the first output shaft 40 and the second output shaft 50 due to magnetic interaction between the input side magnet 21, the magnetic flux modulation unit 55, and the output shaft switching unit 25.

[0115] In the second output state, the first output shaft 40 is attracted toward the output shaft switching unit 25 by the magnetic force generated in the first magnetic force generating unit 27A, and is in close contact with the partition wall 36. Therefore, the magnetic force generated in the first magnetic force generating unit 27A and the frictional force generated between the partition wall 36 and the first output shaft 40 act as a resistance to the rotational driving force transmitted from the drive motor 11 to the first output shaft 40.

[0116] In the second output state, the relationship between the driving force transmitted to the first output shaft 40 and the resistance caused by the output shaft switching unit 25, etc. is set so that the resistance caused by the output shaft switching unit 25, etc. is greater than the driving force transmitted to the first output shaft 40. Therefore, in the second output state, the first output shaft 40 is in a state in which the driving force generated by the drive motor 11 is transmitted, but its rotation is hindered by the resistance caused by the output shaft switching unit 25, etc.

[0117] On the other hand, in the second output state, the second output shaft 50 is moved away from the output shaft switching unit 25 by the magnetic force generated in the second magnetic force generating unit 27B, and is separated from the partition wall 36. For this reason, no magnetic force or frictional force acts as a resistance to the rotational driving force transmitted from the drive motor 11 to the second output shaft 50.

[0118] For this reason, in the second output state, the rotation by the driving force transmitted to the second output shaft 50 is not hindered by the resistance caused by the output shaft switching unit 25, etc. Therefore, in the second output state, the second output shaft 50 receives the driving force generated by the drive motor 11 and is able to output the driving force to the second valve body 59, which is the output destination.

[0119] 6, when the drive motor 11 is driven, the rotational drive force generated by the drive motor 11 is transmitted to the first output shaft 40 and the second output shaft 50 by magnetic interaction between the input side magnet 21, the magnetic flux modulation unit 55, and the output shaft switching unit 25. At this time, the first output shaft 40 remains stopped due to the magnetic force of the output shaft switching unit 25, but the second output shaft 50 rotates at a reduced speed at a predetermined reduction ratio relative to the rotation of the drive motor 11. In the first embodiment, the reduction ratio is 21 due to the configuration of the input side magnet 21, the magnetic flux modulation unit 55, and the output side magnet 45.

[0120] In this way, according to the integrated valve V of the first embodiment, by operating the drive motor 11 in the second output state, it is possible to move the second output shaft 50 and the second valve body 59. That is, by controlling the rotation direction of the drive motor 11 in the second output state, it is possible to move the second valve body 59 closer to or away from the second valve seat 68, thereby realizing adjustment of the throttling opening of the second pressure reducing section VB.

[0121] 5 and 6, the integrated valve V and power transmission device 1 according to the first embodiment can output driving force generated by one drive motor 11 by switching between a first output state in which the driving force is output to a first output shaft 40 and a second output state in which the driving force is output to a second output shaft 50. As a result, the integrated valve V and power transmission device 1 can achieve operations equivalent to two valve devices, a first pressure reducing section VA and a second pressure reducing section VB, with one drive motor 11 as a driving source.

[0122] As a result, with the integrated valve V and power transmission device 1 according to the first embodiment, the valve devices of a fluid circuit requiring a plurality of temperature states (for example, the refrigerant temperatures of the first evaporator 113 and the second evaporator 114), such as the refrigeration cycle 100 shown in Fig. 2, can be realized with one drive source. Also, by realizing the plurality of valve devices as an integrated valve V with a common drive source, the occupied space can be made smaller than when each valve device is provided individually, and the occupied space of the fluid circuit can be made smaller.

[0123] According to the integrated valve V and power transmission device 1 of the first embodiment, in both the first output state and the second output state, the rotational driving force is transmitted via a magnetic gear composed of the input side magnet 21, the magnetic flux modulation unit 55, and the output side magnet 45. By passing through the magnetic gear, the rotational driving force generated by the drive motor 11 is reduced in speed at a reduction ratio determined for each output state and transmitted to the output shaft side. As a result, the integrated valve V and the power transmission device 1 can output the rotational driving force generated by the drive motor 11 to the first valve body 49 or the second valve body 59 in a state in which the torque is increased while the rotational driving force is reduced in speed at a reduction ratio determined for each output state.

[0124] In the first output state shown in Fig. 5 and the second output state shown in Fig. 6, the rotational driving force generated by the drive motor 11 is transmitted to both the first output shaft 40 and the second output shaft 50. In other words, regardless of whether the rotation of the first output shaft 40 and the second output shaft 50 is permitted or restricted, the rotational driving force generated by the drive motor 11 acts on either output shaft.

[0125] In other words, since the driving force continues to be transmitted to the output shaft whose rotation is restricted, it is possible to suppress the occurrence of positional deviation at the timing when rotation of that output shaft is permitted, thereby improving the accuracy of the opening control of the first pressure reduction section VA and the second pressure reduction section VB.

[0126] In this state, the first output state and the second output state can be switched by changing the direction of the DC current flowing through the switching coil 26. Therefore, the integrated valve V and the power transmission device 1 can quickly switch between the adjustment of the opening degree of the first pressure reducing unit VA and the adjustment of the opening degree of the second pressure reducing unit VB, thereby improving the responsiveness of the operation switching of the fluid circuit.

[0127] 1 and other figures, the integrated valve V and the input shaft 20 constituting the power transmission device 1 are disposed in the drive section 10, and the first output shaft 40 and the second output shaft 50 are disposed in a mechanism accommodating section 35 of the main body section 30. The mechanism accommodating section 35 of the main body section 30 is partitioned from the drive section 10 via a partition wall 36, and the mechanism accommodating section 35 communicates with a space constituting a flow passage forming section 60 of the main body section 30.

[0128] That is, in the integrated valve V and the power transmission device 1, the first output shaft 40 and the second output shaft 50 are disposed in a space through which the high-pressure refrigerant flows through the refrigeration cycle 100, and are partitioned from the drive unit 10 side by the partition wall 36. Therefore, a refrigerant sealing structure using the partition wall 36 can be realized, so that the influence of the refrigerant on the operation of the drive unit 10 can be suppressed. Also, by adopting a configuration in which the partition wall 36 is attached to the main body 30, the pressure resistance to the high-pressure refrigerant can be improved.

[0129] As described above, the power transmission device 1 according to the first embodiment has the input shaft 20, the first output shaft 40, and the second output shaft 50, and switches between a first output state and a second output state by the switching operation of the output shaft switching unit 25. The first output state limits the rotation of the second output shaft 50 caused by the driving force, and allows the rotation of the first output shaft 40 caused by the driving force. The second output state limits the rotation of the first output shaft 40 caused by the driving force, and allows the rotation of the second output shaft 50 caused by the driving force.

[0130] Therefore, according to the integrated valve V and the power transmission device 1, the output destination of the driving force generated by one driving source can be appropriately switched to the first output shaft or the second output shaft by switching between the first output state and the second output state by the output shaft switching unit 25. In other words, since the outputs of the first output shaft 40 and the second output shaft 50 can be respectively realized by one driving source, the configuration using the power transmission device 1 (the integrated valve V and the refrigeration cycle 100) can be made compact.

[0131] In the first output state of the output shaft switching unit 25, rotation of the second output shaft 50 by the driving force is restricted, while rotation of the first output shaft 40 by the driving force is permitted. In the second output state, rotation of the first output shaft 40 by the driving force is restricted, while rotation of the second output shaft 50 by the driving force is permitted.

[0132] That is, in either the first output state or the second output state, regardless of whether they rotate or not, the driving force is transmitted to the first output shaft 40 and the second output shaft 50. Therefore, according to the power transmission device 1, even when switching occurs by the output shaft switching unit 25, it is possible to suppress positional deviation of the output destination and control the output modes of the first output shaft 40 and the second output shaft 50 with high accuracy.

[0133] 1 and other drawings, in the integrated valve V and the power transmission device 1, the input shaft 20 has an input side magnet 21, and the first output shaft 40 has an output side magnet 45. The second output shaft 50 has a magnetic flux modulation unit 55. The input shaft 20, the output side magnet 45, and the magnetic flux modulation unit 55 form a so-called magnetic gear. With this configuration, the integrated valve V and the power transmission device 1 can output the driving force input to the input shaft 20 at a reduction gear ratio determined respectively when the driving force is output from the first output shaft 40 and when the driving force is output from the second output shaft 50.

[0134] Furthermore, according to the integrated valve V and the power transmission device 1, the first output shaft 40 and the second output shaft 50 are arranged within the mechanism accommodating section 35 of the main body portion 30, and the mechanism accommodating section 35 is partitioned by a partition wall 36 from the drive section 10 in which the input shaft 20 is arranged.

[0135] As a result, the power transmission device 1 and the integrated valve V can separate the environment on the input shaft 20 side from the environments on the first output shaft 40 and second output shaft 50 sides. For example, even if the drive unit 10 is disposed on the input shaft 20 side, the operation of the drive unit 10 and the input of drive force to the input shaft 20 can be realized without being affected by the environments on the first output shaft 40 and second output shaft 50 sides.

[0136] The output shaft switching unit 25 is disposed outside the mechanism housing portion 35, which corresponds to the housing space, and applies a magnetic force to the first output shaft 40 and the second output shaft 50 disposed inside the mechanism housing portion 35 to restrict the rotation of either the first output shaft 40 or the second output shaft 50. In other words, by using a magnetic force, the operation of the first output shaft 40 and the second output shaft 50 disposed inside the housing space can be controlled in a non-contact manner, and the first output state and the second output state can be switched without affecting the pressure environment inside the mechanism housing portion 35.

[0137] As shown in Fig. 5 and Fig. 6, in the first embodiment, the output shaft switching unit 25, the first switching magnet 46 of the first output shaft 40, and the second switching magnet 56 of the second output shaft 50 apply magnetic forces in the axial direction of each output shaft to switch between the first output state and the second output state. The first output shaft 40 and the second output shaft 50 are disposed on the inner and outer sides in the radial direction of the same rotating shaft. For this reason, when the output shaft switching unit 25 switches between the first output state and the second output state, a load caused by magnetic forces can be applied so as not to interfere with the operation of the first output shaft 40 and the second output shaft 50.

[0138] Second embodiment Next, a second embodiment different from the above-mentioned embodiment will be described with reference to Figs. 7 and 8. In the second embodiment, the configurations of the first output shaft 40, the second output shaft 50, and the output shaft switching unit 25 are different from those of the first embodiment. That is, the other configurations of the integrated valve V and the power transmission device 1 (e.g., the drive unit 10, the main body unit 30, etc.) are the same as those of the first embodiment. For this reason, in the following description, the differences between the integrated valve V and the power transmission device 1 according to the second embodiment and the first embodiment will be described in detail, and descriptions of the other parts will be omitted.

[0139] In the integrated valve V and power transmission device 1 according to the second embodiment, the first output shaft 40 is disposed so as to have a rotation axis on an extension line of the rotation axes of the shaft 14 and the input shaft 20, and outputs a rotational driving force to a first valve body 49. The first output shaft 40 according to the second embodiment has a configuration similar to that of the above-described first embodiment, except that it does not have a first switching magnet 46. Therefore, the first output shaft 40 according to the second embodiment has a large diameter portion 41 in which an output side magnet 45 is disposed, and a small diameter portion 42 in which a groove portion 43 is formed, similar to the first embodiment.

[0140] The second output shaft 50 in the second embodiment is arranged to have a rotation axis on an extension of the rotation axis of the shaft 14 and the input shaft 20, and has a cylindrical portion 51 in which a magnetic flux modulation portion 55 is arranged, and a shaft portion 52 in which an insertion hole 52A is formed.

[0141] As shown in Fig. 7, in the second output shaft 50 according to the second embodiment, a second switching magnet 56 is not disposed on the upper end surface of the cylindrical portion 51. In the cylindrical portion 51 of the second output shaft 50 according to the second embodiment, the magnetic flux modulation portion 55 is formed to be longer in the axial dimension than in the first embodiment. That is, the magnetic flux modulation portion 55 according to the second embodiment is formed so as to generate a region (the upper portion of the magnetic flux modulation portion 55 in Fig. 7) that does not overlap with the output-side magnet 45.

[0142] The output side magnet 45 of the first output shaft 40 is disposed radially outward of the lower portion of the magnetic flux modulation unit 55 according to the second embodiment. The lower portion of the magnetic flux modulation unit 55 is disposed to face the input side magnet 21 and the output side magnet 45 via the pressure vessel 37. Therefore, according to the integrated valve V and power transmission device 1 according to the second embodiment, the driving force transmitted to the input shaft 20 can be transmitted to the first output shaft 40 and the second output shaft 50 by cooperation of the lower portion of the magnetic flux modulation unit 55, the input side magnet 21, and the output side magnet 45.

[0143] 7, in the integrated valve V and power transmission device 1 according to the second embodiment, unlike the first embodiment, a pressure vessel 37 formed in a cylindrical shape with a bottom is disposed so as to cover the upper surface of the flow path forming portion 60. The pressure vessel 37 cooperates with the upper part of the flow path forming portion 60 to form the outer shell of the mechanism accommodating portion 35.

[0144] The pressure vessel 37 is made of, for example, a non-magnetic material or a material having a predetermined magnetic permeability, similar to the partition wall 36 of the first embodiment. Specifically, the pressure vessel 37 is made of stainless steel obtained by transforming an austenitic stainless steel, such as SUS304, aluminum, or SUS305, into martensite by work hardening to impart magnetism.

[0145] 7, in the second embodiment, the wall surface of the pressure vessel 37 is disposed radially outward from the output-side magnet 45 of the first output shaft 40. In addition, the wall surface of the pressure vessel 37 is also disposed radially outward from the upper portion of the magnetic flux modulation section 55 of the second output shaft 50.

[0146] Here, in the integrated valve V and the power transmission device 1 according to the second embodiment, a first fixing coil 70A and a second fixing coil 70B are arranged as the output shaft switching unit 25. The first fixing coil 70A and the second fixing coil 70B are configured by so-called claw pole type fixed coils, and are arranged in an annular shape on the radial outside of the pressure vessel 37.

[0147] The first fixing coil 70A is arranged to face the output side magnet 45 of the first output shaft 40 through the side wall portion of the pressure vessel 37, and generates a magnetic field that inhibits rotation of the first output shaft 40 in response to power supply control.

[0148] The second fixing coil 70B is arranged to face the upper part of the magnetic flux modulation section 55 on the second output shaft 50 through the side wall portion of the pressure vessel 37, and generates a magnetic field that inhibits rotation of the second output shaft 50 in response to current control.

[0149] Here, the configurations of the first fixing coil 70A and the second fixing coil 70B will be described in detail with reference to Fig. 8. Note that, although Fig. 8 shows only a part of the first fixing coil 70A, the second fixing coil 70B has a similar configuration.

[0150] The first fixing coil 70A has a coil body 71 and a toothed core 72. The coil body 71 of the first fixing coil 70A is a DC coil wound in a circular shape. The coil body 71 of the second fixing coil 70B has a similar configuration, except that it is configured with a smaller diameter than the coil body of the first fixing coil 70A.

[0151] The toothed core 72 of the first fixing coil 70A is formed by sheet metal processing, and is arranged so as to wrap from the radially outer side toward the inner side of the annular coil body 71. As shown in Fig. 8, a plurality of sets of upper teeth 72U and lower teeth 72L formed by the ends of the toothed core 72 are arranged on the radially inner side of the first fixing coil 70A.

[0152] The upper teeth 72U are formed by machining one end of the plate material constituting the toothed core 72 into a comb shape, and are arranged radially inward from the radial outside to the upper side of the coil body 71. On the other hand, the lower teeth 72L are formed by machining the other end of the plate material constituting the toothed core 72 into a comb shape, and are arranged radially inward from the radial outside to the lower side of the coil body 71.

[0153] 8, a predetermined gap is formed between the upper teeth 72U and the lower teeth 72L in the first fixing coil 70A, and the upper teeth 72U and the lower teeth 72L are assembled so as to mesh with each other with a gap therebetween. The configuration relating to the upper teeth 72U and the lower teeth 72L is also the same in the second fixing coil 70B.

[0154] In the first fixing coil 70A configured in this manner, when electricity is applied to the coil body 71, for example, the upper tooth portion 72U exhibits an N pole and the lower tooth portion 72L exhibits an S pole. Therefore, on the radially inner side of the first fixing coil 70A, N poles and S poles are arranged alternately in the circumferential direction. The magnetic force thus generated acts on the output-side magnet 45 of the first output shaft 40 via the side wall portion of the pressure vessel 37. In other words, in the first fixing coil 70A, when electricity is applied to the coil body 71, a magnetic field that impedes the rotation of the first output shaft 40 is generated.

[0155] Similarly, in the second fixing coil 70B, by energizing the coil body 71, for example, the upper tooth portion 72U exhibits an N pole and the lower tooth portion 72L exhibits an S pole. Therefore, on the radially inner side of the second fixing coil 70B, N poles and S poles are arranged alternately in the circumferential direction. The magnetic force thus generated acts on the magnetic flux modulation portion 55 of the second output shaft 50 via the side wall portion of the pressure vessel 37. In other words, in the second fixing coil 70B, by energizing the coil body 71, a magnetic field that hinders the rotation of the second output shaft 50 is generated.

[0156] The first fixing coil 70A and the second fixing coil 70B have different total numbers of upper teeth 72U and lower teeth 72L. The total number of the upper teeth 72U and lower teeth 72L in the first fixing coil 70A is determined so that the number of magnetic poles formed by the upper teeth 72U and the lower teeth 72L is equal to the number of poles of the output magnet 45 on the first output shaft 40.

[0157] Therefore, for example, an attractive force due to the S pole and a repulsive force due to the N pole act in the rotational direction between the upper teeth 72U and the lower teeth 72L of the first fixing coil 70A and the output-side magnet 45 of the first output shaft 40. Since the number of poles in the first fixing coil 70A and the output-side magnet 45 satisfy the above-mentioned relationship, the rotation of the first output shaft 40 is hindered, and the rotation of the first output shaft 40 can be stopped.

[0158] On the other hand, the total number of the upper teeth 72U and the lower teeth 72L in the second fixing coil 70B is set to be equal to the total number of the magnetic portions 55A in the flux modulation portion 55 of the second output shaft 50.

[0159] Therefore, an attractive force acts in the rotational direction between the upper tooth portions 72U and the lower tooth portions 72L of the second fixing coil 70B and the magnetic portions 55A in the flux modulation portion 55 of the second output shaft 50. As described above, since the total number of the upper tooth portions 72U and the lower tooth portions 72L of the second fixing coil 70B is the same as the number of the magnetic portions 55A in the second output shaft 50, the rotation of the second output shaft 50 is hindered, and the rotation of the second output shaft 50 can be stopped.

[0160] Next, a first output state of the integrated valve V and the power transmission device 1 according to the second embodiment configured as described above will be described. As described above, the first output state is a state in which the rotation of the second output shaft 50 using the driving force transmitted from the drive motor 11 is restricted, and the rotation of the first output shaft 40 using the driving force is permitted.

[0161] As in the above-described embodiment, in the integrated valve V and the power transmission device 1, when a driving force is generated by starting the operation of the drive motor 11, the driving force is transmitted from the input shaft 20 to the first output shaft 40 and the second output shaft 50 through cooperation of the input side magnet 21, the output side magnet 45, and the magnetic flux modulation unit 55.

[0162] Here, in order to realize the first output state, it is necessary to inhibit the rotation of the second output shaft 50. In the case of the second embodiment, a current is passed through the coil body 71 of the second fixing coil 70B that constitutes the output shaft switching unit 25.

[0163] As a result, a magnetic field that inhibits the rotation of the second output shaft 50 is generated between the upper tooth portion 72U and the lower tooth portion 72L of the second fixing coil 70B and each magnetic portion 55A of the second output shaft 50. For this reason, by controlling the energization of the second fixing coil 70B, it is possible to stop the rotation of the second output shaft 50 against the driving force from the drive motor 11.

[0164] At this time, no current is applied to the first fixing coil 70A, and no magnetic field is generated between the first fixing coil 70A and the output-side magnet 45. Therefore, the first output shaft 40 rotates in response to the driving force from the drive motor 11, and the first valve body 49 can be moved.

[0165] In other words, the integrated valve V and power transmission device 1 according to the second embodiment can realize the first output state by passing current through the coil body 71 of the second fixing coil 70B, thereby inhibiting rotation of the second output shaft 50 and at the same time allowing rotation of the first output shaft 40.

[0166] Moreover, according to the integrated valve V and power transmission device 1 of the second embodiment, when realizing the first output state, a magnetic field is generated to inhibit rotation of the second output shaft 50, and no other members are brought into physical contact with the second output shaft 50. Therefore, according to the integrated valve V and power transmission device 1 of the second embodiment, it is possible to improve the responsiveness in switching to the first output state.

[0167] Next, a description will be given of the second output state of the integrated valve V and the power transmission device 1 according to the second embodiment. As described above, the second output state is a state in which the rotation of the first output shaft 40 using the driving force transmitted from the drive motor 11 is restricted, and the rotation of the second output shaft 50 using the driving force is permitted.

[0168] Here, in order to realize the second output state, it is necessary to inhibit the rotation of the first output shaft 40. In the case of the second embodiment, a current is passed through the coil body 71 of the first fixing coil 70A constituting the output shaft switching unit 25.

[0169] As a result, a magnetic field that inhibits the rotation of the first output shaft 40 is generated between the upper teeth 72U and the lower teeth 72L of the first fixing coil 70A and the output-side magnet 45 of the first output shaft 40. For this reason, by controlling the energization of the first fixing coil 70A, the rotation of the first output shaft 40 can be stopped against the driving force from the drive motor 11.

[0170] At this time, no current is applied to the second fixing coil 70B, and no magnetic field is generated between the second fixing coil 70B and the magnetic section 55A of the magnetic flux modulation section 55. Therefore, the second output shaft 50 rotates in response to the driving force from the drive motor 11, and the second valve body 59 can be moved.

[0171] In other words, the integrated valve V and power transmission device 1 according to the second embodiment can realize the second output state by passing current through the coil body 71 of the first fixing coil 70A, thereby inhibiting rotation of the first output shaft 40 and at the same time allowing rotation of the second output shaft 50.

[0172] Moreover, according to the integrated valve V and power transmission device 1 of the second embodiment, when the second output state is realized, a magnetic field is generated to inhibit rotation of the first output shaft 40, and no other members are brought into physical contact with the first output shaft 40. Therefore, according to the integrated valve V and power transmission device 1 of the second embodiment, it is possible to improve the responsiveness in switching to the second output state.

[0173] As described above, according to the power transmission device 1 of the second embodiment, even in a configuration in which a magnetic field that inhibits rotation is generated when switching between the first output state and the second output state, it is possible to obtain the same functional effects as those of the above-mentioned embodiment due to the configuration and operation.

[0174] According to the second embodiment, when switching between the first output state and the second output state, a magnetic field that inhibits rotation is generated without bringing other members into physical contact with the output shaft. Therefore, the integrated valve V and the power transmission device 1 according to the second embodiment can exhibit high responsiveness when switching between the first output state and the second output state.

[0175] Third embodiment Next, a third embodiment different from the above-mentioned embodiment will be described with reference to FIG. 9. In the third embodiment, the configuration of the output shaft switching unit 25 is different from that of the above-mentioned embodiment. That is, the other configurations (drive unit 10, main body unit 30, first output shaft 40, second output shaft 50, flow path forming unit 60, etc.) of the integrated valve V and the power transmission device 1 according to the third embodiment are similar to those of the above-mentioned second embodiment. For this reason, in the following description, differences between the integrated valve V and the power transmission device 1 according to the third embodiment and the above-mentioned embodiment will be described in detail, and descriptions of other parts will be omitted.

[0176] 9, in the integrated valve V and the power transmission device 1 according to the third embodiment, the output shaft switching unit 25 has a first electromagnet 75A and a second electromagnet 75B. The first electromagnet 75A has a DC coil and a yoke made of a magnetic material, and is disposed so as to face the output side magnet 45 of the first output shaft 40 across the side surface of the pressure vessel 37.

[0177] The first electromagnet 75A is disposed in a portion of the circumferential direction in a range that is radially outside the output-side magnet 45 via the side surface of the pressure vessel 37. Therefore, when a current is passed through the DC coil to generate a magnetic force in the first electromagnet 75A, the magnetic force generated in the first electromagnet 75A acts on a portion of the output-side magnet 45 disposed on the first output shaft 40 via the pressure vessel 37.

[0178] As a result, the first output shaft 40 becomes eccentric in a direction toward or away from the first electromagnet 75A from a normal state in which the first electromagnet 75A does not generate magnetic force, due to the action of the magnetic force generated between the first electromagnet 75A and a part of the output-side magnet 45. As a result, due to the eccentricity of the first output shaft 40, the first output shaft 40 can come into contact with the first bearing member 47 to generate a frictional force, and the frictional force can hinder the rotation of the first output shaft 40.

[0179] The second electromagnet 75B, like the first electromagnet 75A, has a DC coil and a yoke made of a magnetic material, and is positioned so as to face the upper portion of the flux modulation section 55 of the second output shaft 50 via the side surface of the pressure vessel 37.

[0180] Second electromagnet 75B is disposed in a portion of the circumferential direction in a range that is radially outward from the upper portion of magnetic flux modulation section 55 via the side surface of pressure vessel 37. The range in the circumferential direction in which second electromagnet 75B is disposed can be determined regardless of the range in which first electromagnet 75A is disposed.

[0181] Therefore, when a current is passed through the DC coil to generate a magnetic force in second electromagnet 75B, the magnetic force generated in second electromagnet 75B acts on a part of flux modulation unit 55 disposed on second output shaft 50 via pressure vessel 37. More specifically, the magnetic force generated in second electromagnet 75B acts on an upper portion of magnetic unit 55A in flux modulation unit 55.

[0182] As a result, the second output shaft 50 becomes eccentric in a direction approaching the second electromagnet 75B from a normal state in which no magnetic force is generated by the second electromagnet 75B due to the action of the magnetic force generated between the second electromagnet 75B and a part of the magnetic flux modulation section 55. As a result, due to the eccentricity of the second output shaft 50, the second output shaft 50 can come into contact with the second bearing member 57 to generate a frictional force, and the frictional force can hinder the rotation of the second output shaft 50.

[0183] That is, in the third embodiment, either the first output shaft 40 or the second output shaft 50 can be made eccentric by applying a magnetic force to either the first electromagnet 75A or the second electromagnet 75B constituting the output shaft switching unit 25. Since a frictional force acts on the first output shaft 40 or the second output shaft 50 due to contact with other members due to the eccentricity, the rotation of the eccentric output shaft of the first output shaft 40 or the second output shaft 50 is hindered by the frictional force generated between the output shaft and the other member.

[0184] In other words, according to the integrated valve V and power transmission device 1 of the third embodiment, the first output state and the second output state can be switched by selecting an electromagnet that generates magnetic force in the radial direction from among the first electromagnet 75A and the second electromagnet 75B that constitute the output shaft switching section 25.

[0185] Next, a first output state of the integrated valve V and the power transmission device 1 according to the third embodiment configured as described above will be described. As described above, the first output state is a state in which the rotation of the second output shaft 50 using the driving force transmitted from the drive motor 11 is restricted, and the rotation of the first output shaft 40 using the driving force is permitted.

[0186] In the integrated valve V and power transmission device 1 of the third embodiment, when a driving force is generated by starting the operation of the drive motor 11, the driving force is transmitted from the input shaft 20 to the first output shaft 40 and the second output shaft 50 through cooperation of the input side magnet 21, the output side magnet 45, and the magnetic flux modulation unit 55.

[0187] Here, in order to realize the first output state, it is necessary to inhibit the rotation of the second output shaft 50. In the case of the third embodiment, a current is passed through the DC coil of the second electromagnet 75B that constitutes the output shaft switching unit 25.

[0188] As a result, a magnetic force is generated between the second electromagnet 75B and the magnetic portion 55A of the magnetic flux modulation portion 55 in the second output shaft 50, causing the second output shaft 50 to become eccentric in a direction approaching the second electromagnet 75B. As the second output shaft 50 becomes eccentric, the second output shaft 50 comes into contact with other members (for example, the second bearing member 57), and the rotation of the second output shaft 50 is hindered. For this reason, the rotation of the second output shaft 50 can be stopped against the driving force from the drive motor 11 by controlling the energization of the second electromagnet 75B.

[0189] At this time, no current is applied to the DC coil of the first electromagnet 75A, and no magnetic force is generated between the first electromagnet 75A and the output-side magnet 45. Therefore, the first output shaft 40 rotates in response to the driving force from the drive motor 11, and the first valve body 49 can be moved.

[0190] In other words, in the integrated valve V and power transmission device 1 according to the third embodiment, by passing current through the DC coil of the second electromagnet 75B, a magnetic force acts in the radial direction to inhibit rotation of the second output shaft 50, while at the same time allowing rotation of the first output shaft 40, thereby realizing the first output state.

[0191] Furthermore, according to the integrated valve V and power transmission device 1 of the third embodiment, in order to generate a magnetic force in the radial direction on the second output shaft 50 and utilize a frictional force when realizing the first output state, the second electromagnet 75B is disposed at a portion in the circumferential direction. Therefore, according to the integrated valve V and power transmission device 1 of the third embodiment, it is possible to realize switching to the first output state with a more compact configuration compared to the configuration in which the output shaft switching unit 25 is disposed over the entire circumferential area as in the above-mentioned embodiment.

[0192] Next, a description will be given of the second output state of the integrated valve V and the power transmission device 1 according to the third embodiment. As described above, the second output state is a state in which the rotation of the first output shaft 40 using the driving force transmitted from the drive motor 11 is restricted, and the rotation of the second output shaft 50 using the driving force is permitted.

[0193] Here, in order to realize the second output state, it is necessary to inhibit the rotation of the first output shaft 40. In the case of the third embodiment, a current is passed through the DC coil of the first electromagnet 75A that constitutes the output shaft switching unit 25.

[0194] As a result, a magnetic force is generated between the first electromagnet 75A and a part of the output side magnet 45 of the first output shaft 40, causing the first output shaft 40 to become eccentric in a direction toward or away from the first electromagnet 75A. As the first output shaft 40 becomes eccentric, the first output shaft 40 comes into contact with other members (for example, the first bearing member 47), and the rotation of the first output shaft 40 is hindered. Therefore, by controlling the energization of the first electromagnet 75A, the rotation of the first output shaft 40 can be stopped against the driving force from the drive motor 11.

[0195] At this time, no current is applied to the DC coil of the second electromagnet 75B, and no magnetic force is generated between the second electromagnet 75B and a part of the magnetic portion 55A in the magnetic flux modulation portion 55. Therefore, the second output shaft 50 rotates in response to the driving force from the drive motor 11, and the second valve body 59 can be moved.

[0196] In other words, in the integrated valve V and power transmission device 1 according to the third embodiment, by passing current through the DC coil of the first electromagnet 75A, a magnetic force is applied in the radial direction to inhibit rotation of the first output shaft 40, while at the same time allowing rotation of the second output shaft 50, thereby realizing the second output state.

[0197] Furthermore, according to the integrated valve V and power transmission device 1 of the third embodiment, the first electromagnet 75A is disposed at a portion in the circumferential direction in order to utilize frictional force by generating a magnetic force in the radial direction with respect to the first output shaft 40 when realizing the second output state. Therefore, according to the integrated valve V and power transmission device 1 of the third embodiment, it is possible to realize switching to the second output state with a more compact configuration compared to the configuration in which the output shaft switching unit 25 is disposed over the entire circumferential area as in the above-mentioned embodiment.

[0198] As described above, according to the power transmission device 1 of the third embodiment, even in a configuration in which a magnetic force acts in the radial direction when switching between the first output state and the second output state, it is possible to obtain the same advantageous effects as those of the above-mentioned embodiments through the same configuration and operation.

[0199] In the third embodiment, when switching between the first output state and the second output state, a magnetic force is generated in the radial direction with respect to the first output shaft 40 or the second output shaft 50 to make it eccentric, and a frictional force generated between the eccentric output shaft is utilized. For this reason, the first electromagnet 75A and the second electromagnet 75B constituting the output shaft switching unit 25 according to the third embodiment are disposed at a portion in the circumferential direction.

[0200] As a result, according to the integrated valve V and power transmission device 1 of the third embodiment, it is possible to realize switching between the first output state and the second output state with a more compact configuration compared to the configuration in which the output shaft switching unit 25 is arranged over the entire circumferential area as in the above-described embodiment.

[0201] (Fourth embodiment) Next, a fourth embodiment different from the above-mentioned embodiment will be described with reference to Figs. 10 to 15. The fourth embodiment differs from the above-mentioned embodiment in that a switching member 80 is included as a component of the output shaft switching unit 25 that switches between the first output state and the second output state. That is, the other components of the integrated valve V and the power transmission device 1 (drive unit 10, main body unit 30, first output shaft 40, second output shaft 50, flow path forming unit 60, etc.) are the same as those of the above-mentioned embodiment. For this reason, in the following description, the differences from the above-mentioned embodiment among the components of the integrated valve V and the power transmission device 1 according to the fourth embodiment will be described in detail, and descriptions of other parts will be omitted.

[0202] The output shaft switching section 25 in the integrated valve V and power transmission device 1 in the fourth embodiment is composed of a switching coil 26 and a switching yoke 27 arranged along the outer surface of the pressure vessel 37, and a switching member 80 arranged inside the mechanism accommodating section 35.

[0203] 10, in the fourth embodiment, a switching member 80 constituting the output shaft switching unit 25 is disposed inside the mechanism accommodating portion 35 and disposed so as to be movable along the axial direction of the first output shaft 40, etc. The switching member 80 is formed in a cylindrical shape having a first rotation restricting portion 80A and a second rotation restricting portion 80B.

[0204] 11, the inner diameter of the cylindrical switching member 80 is set to be smaller than the maximum outer diameter of the pressure vessel 37 and larger than the outer diameter dimension of the large diameter portion 41 of the first output shaft 40. Therefore, in the fourth embodiment, the switching member 80 can move inside the mechanism accommodating portion 35 along the axial direction of the output shaft, passing between the pressure vessel 37 and the first output shaft 40.

[0205] A first rotation restricting portion 80A is disposed at the lower portion of the switching member 80. The first rotation restricting portion 80A is an annular portion formed to extend radially inward from the lower end portion of the cylindrical switching member 80. The first rotation restricting portion 80A is located lower than the large diameter portion 41 of the first output shaft 40.

[0206] In the fourth embodiment, the upper surface of the first rotation restricting portion 80A approaches or moves away from the lower surface of the large diameter portion 41 of the first output shaft 40 as the switching member 80 moves up and down. That is, in the fourth embodiment, the upper surface of the first rotation restricting portion 80A can be brought into contact with the lower surface of the large diameter portion 41 of the first output shaft 40 by controlling the energization of the switching coil 26.

[0207] A member-side magnet 81 is disposed on a side surface located on the outer diameter side of the first rotation restricting portion 80A. The member-side magnet 81 is disposed such that either the S pole or the N pole (for example, the N pole) faces radially outward.

[0208] 10, the switching coil 26 and the switching yoke 27 in the fourth embodiment are disposed so as to face a member-side magnet 81 of a switching member 80 via a side wall of a pressure vessel 37. By controlling the direction of a current to the switching coil 26, the magnetic poles (S pole, N pole) generated in the switching yoke 27 can be switched.

[0209] By switching the type of magnetic pole in the switching yoke 27 and causing a magnetic force to act between the member-side magnet 81 of the switching member 80, the switching member 80 can be moved up and down inside the mechanism accommodating portion .

[0210] A second rotation restricting portion 80B is disposed on the upper portion of the switching member 80. The second rotation restricting portion 80B is an annular portion formed to extend radially inward from the upper end portion of the cylindrical switching member 80. The second rotation restricting portion 80B is located above the upper surface of the large diameter portion 41 of the first output shaft 40 and the upper surface of the cylindrical portion 51 of the second output shaft 50.

[0211] In the fourth embodiment, the lower surface of the second rotation restricting portion 80B moves away from or approaches the upper surface of the cylindrical portion 51 of the second output shaft 50 as the switching member 80 moves up and down. That is, in the fourth embodiment, the lower surface of the second rotation restricting portion 80B can be brought into contact with the upper surface of the cylindrical portion 51 of the second output shaft 50 by controlling the energization of the switching coil 26.

[0212] 10, a resistance force generating portion 85 is formed in the first rotation restricting portion 80A and the second rotation restricting portion 80B of the switching member 80. The resistance force generating portion 85 of the first rotation restricting portion 80A is formed in a portion of the first rotation restricting portion 80A facing the lower surface of the large diameter portion 41 of the first output shaft 40.

[0213] The resistance generating portion 85 of the second rotation restricting portion 80B is formed in a portion of the second rotation restricting portion 80B that faces the upper surface of the cylindrical portion 51 of the second output shaft 50. The resistance generating portions 85 of the first rotation restricting portion 80A and the second rotation restricting portion 80B are formed in an annular shape centered on the center of the cylindrical switching member 80 and the positions of the rotation axes of the first output shaft 40 and the second output shaft 50.

[0214] In the first rotation restricting portion 80A and the second rotation restricting portion 80B, the reaction force generating portion 85 is formed in an annular shape, and a plurality of protrusions 85A and a plurality of recesses 85B are alternately arranged along the circumferential direction of the annular ring. As shown in Fig. 12, the protrusions 85A and the recesses 85B in the reaction force generating portion 85 are formed so as to extend radially from the center position of the reaction force generating portion 85 in an annular shape.

[0215] Here, the resistance generating portion 85 of the first rotation restricting portion 80A faces the underside of the large diameter portion 41 of the first output shaft 40, and is arranged so as to be able to come into contact with the underside of the large diameter portion 41 as the switching member 80 moves up and down. The underside of the large diameter portion 41 of the first output shaft 40 corresponds to an example of an opposing surface. As shown in FIG. 10 etc., a resistance generating portion 86 having a plurality of convex portions 86A and concave portions 86B is formed on the underside of the large diameter portion 41 of the first output shaft 40.

[0216] The reaction force generating portion 86 on the first output shaft 40 side is formed in an annular shape, similar to the reaction force generating portion 85 of the first rotation restricting portion 80A. In the reaction force generating portion 86 on the first output shaft 40 side as well, a plurality of convex portions 86A and concave portions 86B extend radially from the center of the ring, and the convex portions 86A and the concave portions 86B are arranged alternately in the circumferential direction.

[0217] As a result, when the first rotation restricting portion 80A is brought into contact with the lower surface of the large diameter portion 41 of the first output shaft 40, the convex portion 85A and the concave portion 86B, and the concave portion 85B and the convex portion 86A can be brought into contact in a meshed state as shown in FIG. 13. Here, the switching member 80 is arranged so as to be movable in the axial direction of the output shaft but not to rotate around the axis of the output shaft. For this reason, by meshing the resistance generating portion 85 of the first rotation restricting portion 80A with the resistance generating portion 86 on the first output shaft 40 side, a resistance against the rotational driving force of the first output shaft 40 can be generated, and the rotation of the first output shaft 40 can be inhibited and stopped.

[0218] The resistance generating portion 85 of the second rotation restricting portion 80B faces an upper surface of the cylindrical portion 51 of the second output shaft 50, and is arranged so as to be able to come into contact with the upper surface of the cylindrical portion 51 as the switching member 80 moves up and down. The upper surface of the cylindrical portion 51 of the second output shaft 50 corresponds to an example of an opposing surface. As shown in Fig. 10 etc., a resistance generating portion 87 having a plurality of convex portions 87A and concave portions 87B is formed on the upper surface of the cylindrical portion 51 of the second output shaft 50.

[0219] The reaction force generating portion 87 on the second output shaft 50 side is formed in an annular shape, similar to the reaction force generating portion 85 of the second rotation restricting portion 80B. In the reaction force generating portion 87 on the second output shaft 50 side as well, a plurality of convex portions 87A and concave portions 87B extend radially from the center of the ring, and the convex portions 87A and the concave portions 87B are arranged alternately in the circumferential direction.

[0220] As a result, when the second rotation restricting portion 80B is brought into contact with the upper surface of the cylindrical portion 51 of the second output shaft 50, the convex portion 85A and the concave portion 87B, and the concave portion 85B and the convex portion 87A can be brought into contact in a meshed state as shown in Fig. 13. As described above, the switching member 80 is arranged so as not to rotate around the axis of the output shaft. For this reason, by meshing the resistance generating portion 85 of the second rotation restricting portion 80B with the resistance generating portion 87 on the second output shaft 50 side, a resistance against the rotational driving force of the second output shaft 50 can be generated, and the rotation of the second output shaft 50 can be inhibited and stopped.

[0221] Next, a first output state of the integrated valve V and the power transmission device 1 according to the fourth embodiment configured as described above will be described. As described above, the first output state is a state in which the rotation of the second output shaft 50 using the driving force transmitted from the drive motor 11 is restricted, and the rotation of the first output shaft 40 using the driving force is permitted.

[0222] In the integrated valve V and power transmission device 1 of the fourth embodiment, when a driving force is generated by starting the operation of the drive motor 11, the driving force is transmitted from the input shaft 20 to the first output shaft 40 and the second output shaft 50 through cooperation of the input side magnet 21, the output side magnet 45, and the magnetic flux modulation unit 55.

[0223] Here, in order to realize the first output state, it is necessary to inhibit the rotation of the second output shaft 50. In the case of the fourth embodiment, the switching member 80 is moved by a magnetic force generated by energizing the switching coil 26, and the rotation of the second output shaft 50 is stopped.

[0224] Specifically, by passing a direct current in a predetermined direction through the switching coil 26, a magnetic force of a polarity different from the polarity of the member-side magnet 81 located on the outer surface of the switching member 80 is generated at the lower end of the switching yoke 27. As a result, a magnetic force acts between the lower end of the switching coil 26 and the member-side magnet 81 of the switching member 80 so as to attract each other.

[0225] 14, the switching member 80 moves downward in the axial direction due to the action of the magnetic force, and the second rotation restricting portion 80B comes into contact with the upper surface of the cylindrical portion 51 of the second output shaft 50. At this time, the resistance generating portion 85 of the second rotation restricting portion 80B and the resistance generating portion 87 on the second output shaft 50 side mesh with each other, so that a resistance that inhibits the rotation of the second output shaft 50 can be generated, and the rotation of the second output shaft 50 can be stopped.

[0226] It should be noted that the power supply to the switching coil 26 can be stopped at the stage where the second rotation restricting portion 80B comes into contact with the upper surface of the cylindrical portion 51 of the second output shaft 50. When the power supply to the switching coil 26 is stopped, the electromagnetic force from the switching yoke 27 stops, but the magnetic force of the member-side magnet 81 of the switching member 80 acts as an attractive force on the lower end portion of the switching yoke 27. Therefore, even when the power supply to the switching coil 26 is stopped, the second rotation restricting portion 80B can maintain the state in which the rotation of the second output shaft 50 is stopped.

[0227] Then, by moving the switching member 80 downward along the axial direction, the first rotation restricting portion 80A moves away from the lower surface of the large diameter portion 41 of the first output shaft 40. As a result, the first output shaft 40 becomes rotatable by the driving force transmitted from the input shaft 20 without being hindered by the switching member 80.

[0228] That is, in the integrated valve V and power transmission device 1 of the fourth embodiment, by passing a direct current in a predetermined direction through the switching coil 26, the switching member 80 is moved to inhibit rotation of the second output shaft 50, while at the same time allowing rotation of the first output shaft 40, thereby realizing the first output state.

[0229] Furthermore, according to the integrated valve V and power transmission device 1 of the fourth embodiment, when the first output state is realized, the switching member 80 inside the mechanism housing portion 35 is moved by the magnetic forces from the switching coil 26 and the switching yoke 27 outside the mechanism housing portion 35. Therefore, according to the fourth embodiment, it is possible to realize switching to the first output state without damaging the internal environment (i.e., the high-pressure environment) of the mechanism housing portion 35.

[0230] According to the integrated valve V and power transmission device 1 of the fourth embodiment, the switching member 80 moves along the axial direction of the first output shaft 40, etc., and applies an axial load to the second output shaft 50, thereby inhibiting the rotation of the second output shaft 50. The first output shaft 40 and the second output shaft 50 are disposed on the inner side and the outer side of the same central axis. Therefore, when an axial load is applied to the second output shaft 50, the effect on the rotational operation of the first output shaft 40 can be suppressed.

[0231] Furthermore, in the integrated valve V and power transmission device 1 according to the fourth embodiment, a resistance generating portion 85 is arranged on the second rotation restricting portion 80B of the switching member 80, and a resistance generating portion 87 is arranged on the upper surface of the cylindrical portion 51 of the second output shaft 50. When the first output state is realized, the resistance generating portion 85 on the switching member 80 side comes into contact with the resistance generating portion 87 on the second output shaft 50 side to generate a resistance (friction force) for inhibiting rotation of the second output shaft 50.

[0232] The resistance generating portion 85 and the resistance generating portion 87 each have a plurality of recesses and protrusions extending radially from the center of rotation. Therefore, when the resistance generating portion 85 and the resistance generating portion 87 are brought into contact with each other, the protrusions 85A and the recesses 87B, and the recesses 85B and the protrusions 87A can be brought into contact with each other in a meshed state. This makes it possible to increase the resistance for inhibiting the rotation of the second output shaft 50, and the integrated valve V and the power transmission device 1 according to the fourth embodiment can reliably achieve the first output state.

[0233] Next, a second output state of the integrated valve V and the power transmission device 1 according to the fourth embodiment will be described. The second output state is a state in which rotation of the first output shaft 40 using the driving force transmitted from the drive motor 11 is restricted, and rotation of the second output shaft 50 using the driving force is permitted.

[0234] Here, in order to realize the second output state, it is necessary to inhibit the rotation of the first output shaft 40. In the case of the fourth embodiment, the switching member 80 is moved by a magnetic force generated by energizing the switching coil 26, and the rotation of the first output shaft 40 is stopped.

[0235] Specifically, by passing a DC current in a predetermined direction through the switching coil 26, a magnetic force of a polarity different from the polarity of the member-side magnet 81 located on the outer surface of the switching member 80 is generated at the upper end of the switching yoke 27. In other words, a DC current of a direction opposite to that in the first output state is passed through the switching coil 26. As a result, a magnetic force acts between the upper end of the switching coil 26 and the member-side magnet 81 of the switching member 80 so as to attract each other.

[0236] 15, the switching member 80 moves upward in the axial direction due to the action of the magnetic force, and the first rotation restricting portion 80A comes into contact with the underside of the large diameter portion 41 of the first output shaft 40. At this time, the resistance generating portion 85 of the first rotation restricting portion 80A and the resistance generating portion 86 on the first output shaft 40 side mesh with each other, so that a resistance that inhibits rotation of the first output shaft 40 can be generated, and the rotation of the first output shaft 40 can be stopped.

[0237] It should be noted that the supply of current to the switching coil 26 can be stopped at the stage where the first rotation restricting portion 80A comes into contact with the lower surface of the large diameter portion 41 of the first output shaft 40. When the supply of current to the switching coil 26 is stopped, the electromagnetic force from the switching yoke 27 stops, but the magnetic force of the member-side magnet 81 of the switching member 80 acts as an attractive force on the upper end portion of the switching yoke 27. Therefore, even when the supply of current to the switching coil 26 is stopped, the first rotation restricting portion 80A can maintain the state in which the rotation of the first output shaft 40 is stopped.

[0238] Then, by moving the switching member 80 upward along the axial direction, the second rotation restricting portion 80B moves away from the upper surface of the cylindrical portion 51 of the second output shaft 50. As a result, the second output shaft 50 becomes rotatable by the driving force transmitted from the input shaft 20 without being hindered by the switching member 80.

[0239] That is, the integrated valve V and power transmission device 1 according to the fourth embodiment can move the switching member 80 by passing a DC current through the switching coil 26 in a direction opposite to that in the first output state, thereby inhibiting rotation of the second output shaft 50 and allowing rotation of the first output shaft 40. In other words, the integrated valve V and power transmission device 1 according to the fourth embodiment can realize the second output state by controlling the DC current to the switching coil 26.

[0240] Furthermore, according to the integrated valve V and power transmission device 1 of the fourth embodiment, when the second output state is realized, the switching member 80 inside the mechanism housing portion 35 is moved by the magnetic forces from the switching coil 26 and the switching yoke 27 outside the mechanism housing portion 35. Therefore, according to the fourth embodiment, it is possible to realize switching to the second output state without damaging the internal environment (i.e., the high-pressure environment) of the mechanism housing portion 35.

[0241] According to the integrated valve V and power transmission device 1 of the fourth embodiment, the switching member 80 moves along the axial direction of the first output shaft 40, etc., and applies an axial load to the first output shaft 40, thereby inhibiting the rotation of the first output shaft 40. The first output shaft 40 and the second output shaft 50 are disposed on the inner side and the outer side of the same central axis. Therefore, when an axial load is applied to the first output shaft 40, the effect on the rotational operation of the second output shaft 50 can be suppressed.

[0242] Furthermore, in the integrated valve V and power transmission device 1 according to the fourth embodiment, a resistance generating portion 85 is arranged on the first rotation restricting portion 80A of the switching member 80, and a resistance generating portion 86 is arranged on the underside of the large diameter portion 41 of the first output shaft 40. When the second output state is realized, the resistance generating portion 85 on the switching member 80 side comes into contact with the resistance generating portion 86 on the first output shaft 40 side to generate a resistance (friction force) for inhibiting rotation of the first output shaft 40.

[0243] The resistance generating portion 85 and the resistance generating portion 86 each have a plurality of recesses and protrusions extending radially from the center of rotation. Therefore, when the resistance generating portion 85 and the resistance generating portion 86 are brought into contact with each other, the protrusions 85A and the recesses 86B, and the recesses 85B and the protrusions 86A can be brought into contact with each other in a meshed state. This makes it possible to increase the resistance for inhibiting the rotation of the first output shaft 40, and the integrated valve V and the power transmission device 1 according to the fourth embodiment can reliably achieve the second output state.

[0244] As described above, according to the power transmission device 1 of the fourth embodiment, even when the switching member 80 is moved by electromagnetic force to switch between the first output state and the second output state, it is possible to obtain the same advantageous effects as those of the above-mentioned embodiments due to the configuration and operation.

[0245] According to the integrated valve V and power transmission device 1 of the fourth embodiment, when switching between the first output state and the second output state is realized, the switching member 80 inside the mechanism accommodating portion 35 is moved by the magnetic forces from the switching coil 26 and the switching yoke 27 outside the mechanism accommodating portion 35. For this reason, according to the fourth embodiment, since the switching member 80 is moved without physical contact from outside the mechanism accommodating portion 35, it is possible to realize switching between the first output state and the second output state without damaging the internal environment (i.e., high-pressure environment) of the mechanism accommodating portion 35.

[0246] According to the fourth embodiment, the switching member 80 moves along the axial direction of the first output shaft 40, etc., and applies an axial load to either the first output shaft 40 or the second output shaft 50, thereby inhibiting the rotation of the output shaft to which the load is applied. The first output shaft 40 and the second output shaft 50 are disposed on the inner side and the outer side on the same central axis. Therefore, when an axial load is applied to either the first output shaft 40 or the second output shaft 50, the effect on the rotational operation of the other output shaft can be suppressed.

[0247] Furthermore, in the integrated valve V and power transmission device 1 according to the fourth embodiment, a resistance generating section 85 is arranged on the switching member 80 side, and a resistance generating section 86 and a resistance generating section 87 are arranged on the first output shaft 40 side and the second output shaft 50 side, respectively. When switching between the first output state and the second output state is realized, the resistance generating section 85 on the switching member 80 side comes into contact with the resistance generating section 86 or the resistance generating section 87 on the output shaft side, generating a resistance (friction force) for inhibiting rotation of the output shaft.

[0248] Each of the resistance generating portions 85, 86, and 87 has a plurality of recesses and protrusions extending radially from the center of rotation. Therefore, when the resistance generating portion 85 on the switching member 80 side is brought into contact with the resistance generating portion 86 and the resistance generating portion 87 on the output shaft side, the protrusions 85A and the recesses 86B (recesses 87B), and the recesses 85B and the protrusions 86A (recesses 87A) can be brought into contact in a meshed state, respectively. This makes it possible to increase the resistance for inhibiting the rotation of the first output shaft 40 and the second output shaft 50, and the integrated valve V and the power transmission device 1 according to the fourth embodiment can reliably realize the switching between the first output state and the second output state.

[0249] (Other embodiments) The present disclosure is not limited to the above-described embodiment, and various modifications can be made as follows without departing from the spirit and scope of the present disclosure.

[0250] (a) In the above-described embodiment, the driving force is transmitted to the first output shaft 40 or the second output shaft 50 in a non-contact manner via the mutually acting magnetic forces of the input-side magnet 21, the output-side magnet 45, and the magnetic flux modulation unit 55, but the present invention is not limited to this configuration. For example, it is also possible to employ a configuration in which the driving force from the input shaft 20 is reduced at a predetermined reduction ratio by a mechanical configuration such as a planetary gear mechanism and then transmitted to the first output shaft 40 or the second output shaft 50.

[0251] (b) In the above-described embodiment, as shown in Fig. 5 and Fig. 6, the magnetic force generated by the output shaft switching unit 25 is directly applied to each of the first output shaft 40 and the second output shaft 50 to restrict the rotation of one of them while allowing the rotation of the other. However, the switching operation of the first output shaft 40 and the second output shaft 50 by the output shaft switching unit 25 is not limited to this mode. For example, a braking member that is displaced by the magnetic force generated by the output shaft switching unit 25 may be employed, and the displacement of the braking member may be used to restrict the rotation of one of them while allowing the rotation of the other.

[0252] (c) In the above-described embodiment, as shown in FIG. 1 etc., the first magnetic force generating unit 27A and the second magnetic force generating unit 27B of the output shaft switching unit 25 are disposed on the upper surface portion of the sealing outer edge portion 36C of the partition wall 36, but this is not limited to this embodiment.

[0253] The first magnetic force generating unit 27A can be arranged in various manners as long as it is possible to apply a magnetic force to the first switching magnet 46 of the first output shaft 40 and limit the rotation of the first output shaft 40. Similarly, the second magnetic force generating unit 27B can be arranged in various manners as long as it is possible to apply a magnetic force to the second switching magnet 56 of the second output shaft 50 and limit the rotation of the second output shaft 50.

[0254] (d) In the fourth embodiment described above, the resistance generating portion 85 formed on the switching member 80 is given as a portion that comes into contact with the resistance generating portion 86 and the resistance generating portion 87 formed on the first output shaft 40 and the second output shaft 50, respectively, but this is not limited to this embodiment. It is sufficient that the resistance generating portion 85 is disposed inside the mechanism accommodating portion 35 so as to be in contact with either the first output shaft 40 or the second output shaft 50 and rotatable therewith.

[0255] For example, it is possible to apply the drag generating portion 86 and the drag generating portion 87 on the first output shaft 40 and the second output shaft 50 sides and the corresponding drag generating portion 85 to the configuration of the first embodiment. Specifically, the drag generating portion 86 is formed on the upper surface of the first output shaft 40 in the first embodiment, and the drag generating portion 87 is formed on the upper surface of the second output shaft 50. Then, the drag generating portions 85 facing each other are formed on the surface constituting the inner side of the mechanism accommodating portion 35 at the sealing outer edge portion 36C of the partition wall 36. By configuring in this way, even in the configuration according to the first embodiment, a drag can be applied to either the first output shaft 40 or the second output shaft 50, and the switching between the first output state and the second output state can be reliably realized.

[0256] (e) In the fourth embodiment described above, the configuration shown in FIG. 13 has been given as the shapes of the reaction force generating portion 86 and the reaction force generating portion 87 formed on the first output shaft 40 and the second output shaft 50, and the reaction force generating portion 85 formed on the switching member 80, but the present invention is not limited to this. For example, as shown in FIG. 16, the bottom surface portions of the recesses 86B and 87B may be formed in a shape recessed toward the width direction center of each recess, and the tip of the protrusion 85A of the reaction force generating portion 85 of the switching member 80 may be guided to the width direction center portion. This allows the reaction force generating portion 85 on the switching member 80 side to be deeply engaged with the reaction force generating portion 86 or the reaction force generating portion 87, and ensures that a reaction force that inhibits the rotation of the first output shaft 40 and the second output shaft 50 is applied.

[0257] (f) It is only necessary that the reaction force generating portions 86 and 87 formed on the first output shaft 40 and the second output shaft 50 can be engaged with the reaction force generating portion 85 formed on the switching member 80, and the contact portions between them can be appropriately changed. As described above, a configuration may be adopted in which the tip portions of the convex portions 85A of the reaction force generating portion 85 are brought into contact with the bottom portions of the concave portions 86B and 87B. Alternatively, as shown in FIG. 17, a configuration may be adopted in which the inner side surfaces of the concave portions 86B and 87B are brought into contact with the side surfaces of the convex portions 85A and engaged with each other, and the tip portions of the convex portions 85A of the reaction force generating portion 85 are spaced apart from the bottom portions of the concave portions 86B and 87B.

[0258] The features of the power transmission device disclosed in this specification are as follows. (Item 1) an input shaft (20) that rotates by input of a driving force; a first output shaft (40) that rotates by the driving force transmitted from the input shaft; a second output shaft (50) disposed at a position different from that of the first output shaft and rotated by a driving force transmitted from the input shaft; and an output shaft switching unit (25) that switches between a first output state that limits rotation of the second output shaft by the driving force and allows rotation of the first output shaft by the driving force, and a second output state that limits rotation of the first output shaft by the driving force and allows rotation of the second output shaft by the driving force. (Item 2) The input shaft includes an input magnet (21) having a predetermined number of poles, The input magnet rotates integrally with the input shaft in response to rotation of the input shaft due to input of a driving force, the first output shaft has an output side magnet (45) that is arranged to face the input side magnet and has a different number of poles from the input side magnet, the output side magnet rotates integrally with the first output shaft in accordance with the rotation of the first output shaft, the second output shaft has a magnetic flux modulation section (55) that is configured by arranging a plurality of magnetic sections (55A) in parallel between the input side magnet and the output side magnet and modulates the magnetic flux acting between the input side magnet and the output side magnet, 2. The power transmission device according to item 1, wherein the magnetic flux modulation section rotates integrally with the second output shaft in accordance with rotation of the second output shaft. (Item 3) 3. The power transmission device according to item 1 or 2, wherein the first output shaft and the second output shaft are each disposed inside an accommodation space (35) partitioned with respect to a space in which the input shaft is disposed. (Item 4) The output shaft switching unit is disposed outside the accommodation space, 4. The power transmission device according to item 3, wherein the first output state and the second output state are switched by applying a magnetic force to the inside of the accommodation space to restrict rotation of either the first output shaft or the second output shaft. (Item 5) 5. The power transmission device described in item 4, wherein the output shaft switching unit switches between the first output state and the second output state by generating a load in a radial direction of the first output shaft and the second output shaft due to the action of a magnetic force on the inside of the accommodation space. (Item 6) 5. The power transmission device according to item 4, wherein the output shaft switching unit switches between the first output state and the second output state by forming a magnetic field that inhibits rotation of either the first output shaft or the second output shaft. (Item 7) 5. The power transmission device described in item 4, wherein the output shaft switching unit switches between the first output state and the second output state by generating a load in the axial direction of the first output shaft and the second output shaft due to the action of a magnetic force on the inside of the accommodation space. (Item 8) A reaction force generating portion (85) is disposed inside the accommodation space and generates a reaction force by contact, the output shaft switching unit changes a relative position between the first output shaft or the second output shaft and the drag generating unit in an axial direction of the first output shaft or the second output shaft by an action of a magnetic force on the inside of the accommodation space, 8. The power transmission device according to item 7, wherein the first output state and the second output state are switched by the action of a resistance force generated between the resistance generating portion and either the first output shaft or the second output shaft. (Item 9) the reaction force generating portion is disposed within the accommodation space so as to be displaceable along the axial direction of the first output shaft and the second output shaft, 9. The power transmission device according to item 8, wherein the magnetic flux is displaced in the axial direction by the action of a magnetic force from the output shaft switching portion and comes into contact with either the first output shaft or the second output shaft. (Item 10) The first output shaft and the second output shaft are disposed inside the accommodation space so as to be displaceable along the axial direction of the first output shaft and the second output shaft. 9. The power transmission device according to item 8, wherein the resistance generating unit is disposed at a position where it comes into contact with either the first output shaft or the second output shaft when the resistance generating unit is displaced in the axial direction by the action of a magnetic force from the output shaft switching unit. (Item 11) When a surface of the first output shaft and the second output shaft that faces the reaction force generating portion in the axial direction of the first output shaft and the second output shaft is defined as an opposing surface, A convex portion (85A, 86A, 87A) protruding in the axial direction of the first output shaft and the second output shaft is formed on either the reaction force generating portion or the opposing surface, 11. The power transmission device according to any one of items 8 to 10, wherein the other of the resistance generating portion and the opposing surface is formed with a recess (85B, 86B, 87B) that is recessed in the axial direction of the first output shaft and the second output shaft and engages with the protrusion. [Explanation of symbols]

[0259] 1 Power transmission device 20 Input shaft 21 Input magnet 25 Output shaft switching section 40 First output shaft 45 Output magnet 50 Second output shaft 55 Flux Modulation Section

Claims

1. An input shaft (20) that rotates by input of a driving force; a first output shaft (40) that rotates by the driving force transmitted from the input shaft; a second output shaft (50) disposed at a position different from that of the first output shaft and rotated by a driving force transmitted from the input shaft; and an output shaft switching unit (25) that switches between a first output state that limits rotation of the second output shaft by the driving force and allows rotation of the first output shaft by the driving force, and a second output state that limits rotation of the first output shaft by the driving force and allows rotation of the second output shaft by the driving force.

2. The input shaft includes an input magnet (21) having a predetermined number of poles, The input magnet rotates integrally with the input shaft in response to rotation of the input shaft due to input of a driving force, The first output shaft has an output side magnet (45) arranged to face the input side magnet and configured with a different number of poles from the input side magnet, the output side magnet rotates integrally with the first output shaft in accordance with the rotation of the first output shaft, the second output shaft has a magnetic flux modulation section (55) that is configured by arranging a plurality of magnetic sections (55A) in parallel between the input side magnet and the output side magnet and modulates the magnetic flux acting between the input side magnet and the output side magnet, The power transmission device according to claim 1 , wherein the magnetic flux modulation portion rotates integrally with the second output shaft in association with rotation of the second output shaft.

3. 3. The power transmission device according to claim 1, wherein the first output shaft and the second output shaft are each disposed inside an accommodation space (35) partitioned with respect to a space in which the input shaft is disposed.

4. The output shaft switching unit is disposed outside the accommodation space, 4. The power transmission device according to claim 3, wherein the first output state and the second output state are switched by applying a magnetic force to the inside of the accommodation space to restrict rotation of either the first output shaft or the second output shaft.

5. 5. The power transmission device according to claim 4, wherein the output shaft switching unit switches between the first output state and the second output state by generating a load in a radial direction of the first output shaft and the second output shaft due to the action of a magnetic force on the inside of the accommodation space.

6. 5. The power transmission device according to claim 4, wherein the output shaft switching unit switches between the first output state and the second output state by forming a magnetic field that inhibits rotation of either the first output shaft or the second output shaft.

7. 5. The power transmission device according to claim 4, wherein the output shaft switching unit switches between the first output state and the second output state by generating a load in an axial direction of the first output shaft and the second output shaft due to the action of a magnetic force on the inside of the accommodation space.

8. A reaction force generating portion (85) is disposed inside the accommodation space and generates a reaction force by contact, the output shaft switching unit changes a relative position of the reaction force generating unit and one of the first output shaft and the second output shaft in an axial direction of the first output shaft and the second output shaft by an action of a magnetic force on the inside of the accommodation space, 8. The power transmission device according to claim 7, wherein the first output state and the second output state are switched by the action of a resistance force generated between the resistance generating portion and either the first output shaft or the second output shaft.

9. the reaction force generating portion is disposed within the accommodation space so as to be displaceable along the axial direction of the first output shaft and the second output shaft, 9. The power transmission device according to claim 8, wherein the magnetic flux is displaced in the axial direction by the action of a magnetic force from the output shaft switching portion, and comes into contact with either the first output shaft or the second output shaft.

10. The first output shaft and the second output shaft are disposed inside the accommodation space so as to be displaceable along the axial direction of the first output shaft and the second output shaft.

9. The power transmission device according to claim 8, wherein the resistance generating portion is disposed at a position where it comes into contact with either the first output shaft or the second output shaft when displaced in the axial direction by the action of a magnetic force from the output shaft switching portion.

11. When a surface of the first output shaft and the second output shaft that faces the reaction force generating portion in the axial direction of the first output shaft and the second output shaft is defined as an opposing surface, A convex portion (85A, 86A, 87A) protruding in the axial direction of the first output shaft and the second output shaft is formed on either the reaction force generating portion or the opposing surface, 9. A power transmission device as described in claim 8, wherein the other of the resistance generating portion and the opposing surface is formed with a recess (85B, 86B, 87B) recessed in the axial direction of the first output shaft and the second output shaft and adapted to engage with the protrusion.

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