JP6725467B2 - Mounting structure, rotating machine, air conditioner, and adjusting method - Google Patents

Description

Embodiments of the present invention relate to a mounting structure, a rotary machine, an air conditioner, and an adjusting method.

In a rotary machine that rotates a rotating object such as a fan, a mounting structure connects a shaft of a power source such as a motor and a rotating object such as a fan. For example, a shaft is inserted through a hole provided in the mounting structure, and a rotating object is connected to the outer periphery of the mounting structure.

JP 2012-92810 A

The center of gravity of the rotating body may be eccentric with respect to the shaft. In this case, when the rotating body rotates, vibration may occur in the rotating body.

The mounting structure according to one embodiment includes a first member, a second member, a third member, a first limiting member, and a second limiting member. The first member has a first inner peripheral surface extending around the first central axis, and a second center located on the opposite side of the first inner peripheral surface and different from the first central axis. A first outer peripheral surface extending about an axis, and at least a part of the first inner peripheral surface forms a first hole, and the second center is formed on the first outer peripheral surface. At least one first recess is provided about the axis at a first angular distance. The second member is located on the opposite side of the second inner peripheral surface from the second inner peripheral surface extending around the second central axis, and the third member is different from the second central axis. A second outer peripheral surface extending about the central axis, and at least a portion of the second inner peripheral surface forms a second hole configured to accommodate the first member and It is configured to come into contact with the first outer peripheral surface of the first member housed in the second hole, and has the first corner on the second inner peripheral surface around the second central axis. At least one second concave portion is provided for each second angular distance different from the distance, and at least one second concave portion is provided on the second outer peripheral surface for each third angular distance around the third central axis. One third recess is provided. The third member has a third inner peripheral surface extending around the third central axis, and at least a part of the third inner peripheral surface is configured to accommodate the second member. A third hole formed in the third hole while contacting the second outer peripheral surface of the second member housed in the third hole At least one fourth concave portion is provided around the fourth angular distance different from the third angular distance. The first limiting member is housed in one of the first recesses and one of the second recesses facing each other, and the first member and the second member are provided around the second central axis. Limit rotation. The second limiting member is housed in one of the third concave portion and one of the fourth concave portion facing each other, and the second member and the third member are arranged around the third central axis. Limit rotation.

FIG. 1 is a perspective view showing the air conditioner of the first embodiment. FIG. 2 is a perspective view showing the main body of the indoor unit of the first embodiment. FIG. 3 is a cross-sectional view showing the main body of the indoor unit of the first embodiment. FIG. 4 is a perspective view schematically showing an exploded shaft and bush of the motor of the first embodiment. FIG. 5 is a plan view showing the bush of the first embodiment. FIG. 6 is a plan view showing a part of the bush of the first embodiment. FIG. 7: is a top view which shows the bush by which the 1st member of 1st Embodiment is rotated. FIG. 8: is a top view which shows the bush by which the 2nd member of 1st Embodiment is rotated. FIG. 9 is a plan view showing another example of the bush according to the first embodiment. FIG. 10 is a plan view showing a part of the bush according to the second embodiment. FIG. 11 is a plan view showing a part of the bush according to the third embodiment. FIG. 12 is a plan view showing a part of the bush according to the fourth embodiment.

(First embodiment)
The first embodiment will be described below with reference to FIGS. 1 to 9. In addition, in this specification, a plurality of expressions may be described as to the constituent elements and the description of the constituent elements according to the embodiment. The components and the description having a plurality of expressions may have other expressions not described. Further, components and explanations that are not expressed in plural may be expressed in other expressions not described.

FIG. 1 is a perspective view showing an air conditioner (air conditioner; hereinafter referred to as an air conditioner) 10 of the first embodiment. The air conditioner 10 is an example of an air conditioner and a rotary machine, and may be referred to as an air conditioner, for example. The rotary machine is not limited to the air conditioner 10, and may be a mechanism having an industrial motor, household electric appliances such as a fan and a washing machine, or another machine having a power source and a rotating body.

As shown in each drawing, an X axis, a Y axis, and a Z axis are defined herein. The X axis, the Y axis, and the Z axis are orthogonal to each other. The X axis extends along the width of the air conditioner 10. The Y axis is along the length (depth) of the air conditioner 10. The Z axis is along the height of the air conditioner 10.

As shown in FIG. 1, the air conditioner 10 has an indoor unit 11. The indoor unit 11 is connected to, for example, an outdoor unit and a control device that controls the indoor unit 11 and the outdoor unit. An air conditioning system in which a plurality of indoor units 11 are connected to one control device may be configured.

The indoor unit 11 has a cover 21 and a main body 22. The cover 21 is provided, for example, on the ceiling in the room where the indoor unit 11 is installed. The cover 21 is provided with a plurality of intake ports 25 and a plurality of air supply ports 26. The air supply port 26 can be opened and closed by a louver, for example.

FIG. 2 is a perspective view showing the main body 22 of the indoor unit 11 according to the first embodiment. FIG. 3 is a cross-sectional view showing the main body 22 of the indoor unit 11 of the first embodiment. As shown in FIGS. 2 and 3, the main body 22 has a housing 31, a heat exchanger 32, a motor 33, a turbo fan 34, a cap 35, and a bush 36. The motor 33 is an example of a power source. The turbo fan 34 is an example of a rotating body and a fan, and may be referred to as a centrifugal fan, for example. The rotating body is not limited to the turbofan 34, but may be another fan such as a propeller fan, or another rotating body such as a gear or a pulley. The bush 36 is an example of a mounting structure, and may be referred to as, for example, a connecting component, a bearing, or a member.

As shown in FIG. 3, the housing 31 is made of, for example, metal and has an upper wall 41 and a peripheral wall 42. The upper wall 41 is formed in a plate shape extending on the XY plane. Ribs that improve the rigidity of the upper wall 41 may be formed on the upper wall 41, for example. The peripheral wall 42 is formed in a tubular shape extending from the edge of the upper wall 41 in the negative direction along the Z axis (the opposite direction of the arrow of the Z axis, the downward direction).

An air blow passage 45 is provided inside the housing 31. The air passage 45 may be formed by the housing 31, or may be formed by, for example, a member mounted inside the housing 31. The upper wall 41 has an inner surface 41 a facing the air passage 45. The inner surface 41a faces in the negative direction along the Z axis.

The heat exchanger 32 is arranged in the air passage 45. The heat exchanger 32 is attached to, for example, the inner surface 41a of the upper wall 41, and is formed in a tubular shape extending in the negative direction along the Z axis. The heat exchanger 32 has, for example, tubes and fins through which the refrigerant flows. The heat exchanger 32 causes heat exchange between the air passing through the heat exchanger 32 and the refrigerant to heat or cool the air. The heat exchanger 32 is not limited to this example.

The motor 33 is, for example, a DC motor whose rotation speed can be changed by inverter control. The motor 33 is attached to the inner surface 41a of the upper wall 41. For example, the motor 33 is attached to the bolt extending from the inner surface 41a by a nut.

The motor 33 has a shaft 33a. The shaft 33a may also be referred to as a drive shaft or a rotation shaft, for example. The shaft 33a extends in the negative direction along the Z axis. When the motor 33 is driven, the motor 33 rotates the shaft 33a around the central axis of the shaft 33a.

The turbo fan 34 is arranged in the air passage 45 and is surrounded by the heat exchanger 32. The turbo fan 34 is made of, for example, a synthetic resin. The turbofan 34 may be made of other materials. The turbo fan 34 has a hub 51, a support portion 52, a connecting portion 53, a plurality of blades 54, and a shroud 55.

The hub 51 is formed in a tubular shape extending in the direction along the Z axis. The hub 51 is attached to the shaft 33a of the motor 33 via the bush 36. The support portion 52 is formed in an annular shape extending on the XY plane. The support portion 52 is arranged closer to the upper wall 41 than the hub 51 and surrounds the motor 33.

The connecting portion 53 is formed in, for example, a substantially frustoconical tubular shape, and connects the end portion of the hub 51 and the inner circumference of the support portion 52. The plurality of blades 54 are arranged in an annular shape and extend from the support portion 52 in the negative direction along the Z axis. The shroud 55 is formed in an annular shape extending on the XY plane and is connected to the ends of the plurality of blades 54.

The motor 33 rotates the shaft 33a to rotate the turbo fan 34. As shown by the arrow in FIG. 3, the rotating turbo fan 34 sucks indoor air from the intake port 25 in FIG. 1 and sends the air to the heat exchanger 32. The air warmed or cooled by the heat exchanger 32 is supplied to the room through the air supply port 26 of FIG.

The cap 35 fixes the turbofan 34 and the bush 36 to the shaft 33a of the motor 33. For example, the cap 35 is screwed to a male screw formed on the tip of the shaft 33a to support the turbo fan 34 and the bush 36.

FIG. 4 is a perspective view schematically showing the shaft 33a and the bush 36 of the motor 33 of the first embodiment in a disassembled state. FIG. 4 shows a cross section of the bush 36. As shown in FIG. 4, the bush 36 has a first member 61, a second member 62, a third member 63, a first pin 64, and a second pin 65. The first pin 64 is an example of a first limiting member. The second pin 65 is an example of a second limiting member.

The first member 61, the second member 62, and the third member 63 are made of a relatively light metal such as an aluminum alloy. That is, the first to third members 61 to 63 are made of the same material.

The first to third members 61 to 63 may be made of another material such as synthetic resin. Further, the material of the first member 61, the material of the second member 62, and the material of the third member 63 may be different.

The first member 61 has a tubular portion 71 and a flange portion 72. The tubular portion 71 is formed in a substantially cylindrical shape extending in the direction along the Z axis. Therefore, the cylindrical portion 71 is provided with the first hole 75 extending in the direction along the Z axis and penetrating the cylindrical portion 71. The first hole 75 is not limited to the hole penetrating the tubular portion 71, and may be a hole having a bottom.

FIG. 5 is a plan view showing the bush 36 of the first embodiment. As shown in FIG. 5, the first hole 75 has a substantially circular cross section centered on the first central axis C1. The first central axis C1 is a virtual central axis of the first hole 75 along the Z axis. That is, the first hole 75 is a substantially circular hole extending around the first central axis C1. In other words, the first hole 75 is a hole that extends centering on the first central axis C1. In the present embodiment, the first central axis C1 substantially coincides with the central axis of the shaft 33a of the motor 33. Therefore, the first central axis C1 may also be referred to as a rotation center.

As shown in FIG. 4, the tubular portion 71 has a first inner peripheral surface 71a, a first outer peripheral surface 71b, and two first end surfaces 71c. The first inner peripheral surface 71a is a substantially cylindrical surface that defines (defines) the first hole 75 and extends around the first central axis C1. In other words, the first inner peripheral surface 71a forms the first hole 75. In addition, a part of the first inner peripheral surface 71 a may form the first hole 75. In other words, the first inner peripheral surface 71a is a substantially cylindrical surface that extends with the first central axis C1 as the center. The first inner peripheral surface 71 a faces the inside of the first hole 75. The first hole 75 is provided inside the first inner peripheral surface 71a.

The first outer peripheral surface 71b is located on the opposite side of the first inner peripheral surface 71a. As shown in FIG. 5, the first outer peripheral surface 71b is a substantially cylindrical surface extending around the second central axis C2. In other words, the first outer peripheral surface 71b is a substantially cylindrical surface that extends with the second central axis C2 as the center.

The second central axis C2 is a virtual central axis of the first outer peripheral surface 71b along the Z axis. The second central axis C2 is parallel to the first central axis C1 and is located at a position different from the first central axis C1. In other words, the second central axis C2 is different from the first central axis C1. That is, the first outer peripheral surface 71b and the first inner peripheral surface 71a and the first hole 75 are eccentric to each other. The second central axis C2 may be inclined with respect to the first central axis C1.

The first outer peripheral surface 71b is formed in a substantially cylindrical shape extending around the second central axis C2, and thus is formed in rotational symmetry around the second central axis C2. Thus, the second central axis C2 is also the axis of symmetry of the first outer peripheral surface 71b.

As shown in FIG. 4, the two first end surfaces 71c face the positive direction along the Z axis (the direction indicated by the arrow on the Z axis, the upward direction) and the negative direction along the Z axis. The first hole 75 opens in the two first end surfaces 71c.

A fitting portion 76 is provided on the tubular portion 71. The fitting portion 76 projects from the first inner peripheral surface 71 a to the inside of the first hole 75. The length of the fitting portion 76 is shorter than the length of the first hole 75 in the direction along the Z axis. In other words, the fitting portion 76 is provided on a part of the first inner peripheral surface 71a in the direction along the Z axis. The fitting portion 76 is not limited to this example.

As in the present embodiment, a protrusion such as a recess or a fitting portion 76 may be provided on a part of the first inner peripheral surface 71a. In this case, the first central axis C1 passes through the center of the first hole 75 in a portion having a circular cross section in which no recess or protrusion is provided. Moreover, a dent or a protrusion may be provided in the entire area of the first inner peripheral surface 71a in the direction along the Z axis. In this case, the first central axis C1 passes through the center of the arc-shaped portion in the cross section of the first hole 75. When the cross section of the first hole 75 includes a plurality of arc-shaped portions, the first central axis C1 has a center closest to the geometric center of gravity (centroid) of the cross section of the first hole 75, The first hole 75 passes through the center of the arc-shaped portion in the cross section.

In the above description, the case where the cross section of the first hole 75 has a circular or arc-shaped portion has been described, but the cross section of the first hole 75 may not have an arc-shaped portion. In this case, the first central axis C1 passes through the axis of symmetry of the first hole 75 in a portion having a rotationally symmetric cross section in which no depression or protrusion is provided. Moreover, a dent or a protrusion may be provided in the entire area of the first inner peripheral surface 71a in the direction along the Z axis. In this case, the first central axis C1 passes through the axis of symmetry of the largest rotational symmetry formed by the cross section of the first hole 75. If the shape of the first hole 75 does not apply to any of the above cases, the first central axis C1 passes through the geometric center of gravity of the cross section of the first hole 75.

The shaft 33 a of the motor 33 is inserted into the first hole 75. The shaft 33a is a so-called D-cut shaft provided with a notch 33b. When the shaft 33a is passed through the first hole 75, the fitting portion 76 fits in the notch 33b. As a result, the rotation of the shaft 33a is transmitted to the first member 61.

The flange portion 72 projects from the first outer peripheral surface 71b of the tubular portion 71. The flange portion 72 is formed in a substantially disc shape extending on the XY plane. The flange 72 may be formed in another shape.

The flange portion 72 projects from the end of the first outer peripheral surface 71b in the positive direction along the Z axis. The flange portion 72 has a first surface 72a and a second surface 72b. The first surface 72a is a substantially flat surface that faces the positive direction along the Z axis. The first surface 72a is continuous with the one first end surface 71c of the tubular portion 71. The second surface 72b is located on the opposite side of the first surface 72a and is a substantially flat surface that faces the negative direction along the Z axis.

The second member 62 is formed in a substantially cylindrical shape extending in the direction along the Z axis. Therefore, the second member 62 is provided with the second hole 81 extending in the direction along the Z-axis and penetrating the second member 62. The second hole 81 is not limited to the hole penetrating the second member 62, and may be a bottomed hole.

As shown in FIG. 5, the second hole 81 has a substantially circular cross section centered on the second central axis C2. That is, the second central axis C2 is a virtual central axis of the second hole 81 along the Z axis, and the second hole 81 is a substantially circular hole extending centering on the second central axis C2. In other words, the second hole 81 is a hole that extends centering on the second central axis C2.

As shown in FIG. 4, the second member 62 has a second inner peripheral surface 62a, a second outer peripheral surface 62b, and two second end surfaces 62c. The second inner peripheral surface 62a is a substantially cylindrical surface that defines (defines) the second hole 81 and extends around the second central axis C2. In other words, the second inner peripheral surface 62a forms the second hole 81. The second inner peripheral surface 62a may partially form the second hole 81. In other words, the second inner peripheral surface 62a is a substantially cylindrical surface that extends with the second central axis C2 as the center. The second inner peripheral surface 62 a faces the inside of the second hole 81. The second hole 81 is provided inside the second inner peripheral surface 62a.

The second inner peripheral surface 62a is formed in a substantially cylindrical shape extending around the second central axis C2, and thus is formed in rotational symmetry around the second central axis C2. Thus, the second central axis C2 is also the axis of symmetry of the second inner peripheral surface 62a.

As described above, the centers of the second hole 81 and the second inner peripheral surface 62a (second central axis C2) and the center of the first outer peripheral surface 71b of the tubular portion 71 of the first member 61 (first 2 is substantially coincident with the central axis C2). Therefore, when the first member 61 and the second member 62 are not fixed to each other and are free, the second member 62 should rotate with respect to the first member 61 about the second central axis C2. You can

The cylindrical portion 71 of the first member 61 is housed in the second hole 81. The radius of the second hole 81 and the radius of the first outer peripheral surface 71b of the tubular portion 71 of the first member 61 are substantially equal. Therefore, the second inner peripheral surface 62 a contacts the first outer peripheral surface 71 b of the tubular portion 71 housed in the second hole 81, and the second member 62 is displaced relative to the first member 61 by Z. Restrict movement in the direction that intersects the axis. In addition, a part of the second inner peripheral surface 62a may be slightly separated from the first outer peripheral surface 71b.

The second outer peripheral surface 62b is located on the opposite side of the second inner peripheral surface 62a. As shown in FIG. 5, the second outer peripheral surface 62b is a cylindrical surface extending around the third central axis C3. In other words, the second outer peripheral surface 62b is a cylindrical surface that extends with the third central axis C3 as the center.

The third central axis C3 is a virtual center line of the second outer peripheral surface 62b along the Z axis. The third central axis C3 is parallel to the first central axis C1 and parallel to the second central axis C2, and is at a position different from the second central axis C2. In other words, the third central axis C3 is different from the second central axis C2. That is, the second outer peripheral surface 62b and the second inner peripheral surface 62a and the second hole 81 are eccentric to each other. The third central axis C3 may be inclined with respect to the first central axis C1 and may be inclined with respect to the second central axis C2.

The distance r ₁₂ between the first central axis C1 and the second central axis C2 is substantially equal to the distance r ₂₃ between the second central axis C2 and the third central axis C3. Therefore, as shown in FIG. 5, the first central axis C1 and the third central axis C3 can be arranged at the same position.

The second outer peripheral surface 62b is formed in a cylindrical shape extending around the third central axis C3, so that the second outer peripheral surface 62b is rotationally symmetrical about the third central axis C3. Thus, the third central axis C3 is also the axis of symmetry of the second outer peripheral surface 62b.

As shown in FIG. 4, the two second end surfaces 62c face the positive direction along the Z axis and the negative direction along the Z axis. The second hole 81 opens in the two second end faces 62c. Since the cylindrical portion 71 is housed in the second hole 81, the second end surface 62c that faces the positive direction along the Z-axis contacts the second surface 72b of the flange portion 72. The flange portion 72 supports the second member 62 and restricts the movement of the second member 62 with respect to the first member 61 in the positive direction along the Z axis.

The third member 63 is formed in a substantially cylindrical shape extending in the direction along the Z axis. For this reason, the third member 63 is provided with a third hole 85 extending in the direction along the Z axis and penetrating the third member 63. The third hole 85 is not limited to the hole penetrating the third member 63, and may be a hole having a bottom.

As shown in FIG. 5, the third hole 85 has a substantially circular cross section centered on the third central axis C3. That is, the third central axis C3 is an imaginary central axis of the third hole 85 along the Z axis, and the third hole 85 is a substantially circular hole extending around the third central axis C3. In other words, the third hole 85 is a hole that extends centering on the third central axis C3.

As shown in FIG. 4, the third member 63 has a third inner peripheral surface 63a, a third outer peripheral surface 63b, and two third end surfaces 63c. The third inner peripheral surface 63a is a substantially cylindrical surface that defines (defines) the third hole 85 and extends around the third central axis C3. In other words, the third inner peripheral surface 63a forms the third hole 85. In addition, a part of the third inner peripheral surface 63a may form the third hole 85. In other words, the third inner peripheral surface 63a is a substantially cylindrical surface that extends with the third central axis C3 as the center. The third inner peripheral surface 63 a faces the inside of the third hole 85. The third hole 85 is provided inside the third inner peripheral surface 63a. The third inner peripheral surface 63a and the second inner peripheral surface 62a and the second hole 81 are eccentric to each other.

The third inner peripheral surface 63a is formed in a substantially cylindrical shape extending around the third central axis C3, and is thus formed in rotational symmetry around the third central axis C3. Thus, the third central axis C3 is also the axis of symmetry of the third inner peripheral surface 63a.

As described above, the center of the third hole 85 and the third inner peripheral surface 63a (the third central axis C3) and the center of the second outer peripheral surface 62b of the second member 62 (the third central axis C3). It substantially coincides with C3). Therefore, when the second member 62 and the third member 63 are not fixed to each other and are free, the third member 63 should rotate with respect to the second member 62 about the third central axis C3. You can

The second member 62 is housed in the third hole 85. The radius of the third hole 85 and the radius of the second outer peripheral surface 62b of the second member 62 are substantially equal. Therefore, the third inner peripheral surface 63a contacts the second outer peripheral surface 62b of the second member 62 housed in the third hole 85, and the third member 63 is opposed to the second member 62. Restricting movement in the direction intersecting the Z axis. In addition, a part of the third inner peripheral surface 63a may be slightly separated from the second outer peripheral surface 62b.

The third outer peripheral surface 63b is located on the opposite side of the third inner peripheral surface 63a. As shown in FIG. 5, the third outer peripheral surface 63b is a cylindrical surface extending around the third central axis C3. That is, the center of the third outer peripheral surface 63b (third central axis C3) and the center of the third inner peripheral surface 63a (third central axis C3) substantially coincide with each other. In other words, the third inner peripheral surface 63a and the third outer peripheral surface 63b are arranged concentrically.

The third outer peripheral surface 63b is a substantially cylindrical surface extending with the third central axis C3 as the central axis. The third outer peripheral surface 63b is formed in rotational symmetry around the third central axis C3. Thus, the third central axis C3 is also the axis of symmetry of the third outer peripheral surface 63b.

As shown in FIG. 3, the third member 63 is integrally formed with the hub 51 of the turbofan 34 by insert molding, for example. In the present embodiment, the third outer peripheral surface 63b of the third member 63 is connected to the hub 51 of the turbo fan 34. The third member 63 and the turbo fan 34 are not limited to this example, and may be formed as a single component by using the same material, for example.

As shown in FIG. 4, the two third end surfaces 63c face the positive direction along the Z axis and the negative direction along the Z axis. The third hole 85 opens in the two third end faces 63c. The cylindrical portion 71 is accommodated in the second hole 81, and the second member 62 is accommodated in the third hole 85, so that the third end surface 63c facing in the positive direction along the Z-axis is formed in the flange portion 72. It contacts the second surface 72b. The flange portion 72 supports the third member 63 and restricts the movement of the third member 63 with respect to the first member 61 in the positive direction along the Z axis.

In a state in which the tubular portion 71 is housed in the second hole 81 and the second member 62 is housed in the third hole 85, the first end surface 71c and the second end surface 62c facing the negative direction along the Z axis. , And the third end surface 63c form substantially the same plane. The cap 35 attached to the shaft 33a supports the first end face 71c, the second end face 62c, and the third end face 63c that face the negative direction along the Z axis, and supports the second and third members 62, 63. Restrict movement of the first member 61 in the negative direction along the Z-axis with respect to the first member 61.

A sheet 78 may be interposed between the cap 35 and the first to third members 61 to 63. The sheet 78 is a substantially annular sheet made of a material having elasticity such as synthetic rubber. By providing the sheet 78, even when the first end surface 71c, the second end surface 62c, and the third end surface 63c that face in the negative direction along the Z axis form a step, the cap 35 is provided with the first to third surfaces. The third end faces 71c, 62c, 63c can be stably supported.

FIG. 6 is a plan view showing a part of the bush 36 of the first embodiment. As shown in FIG. 6, a plurality of first concave portions 91 are provided on the first outer peripheral surface 71b of the first member 61. The first recess 91 may also be referred to as, for example, a groove, a recess, or a cutout.

The first recess 91 is a groove that extends in the direction along the Z axis and has a substantially semicircular cross section. The first concave portion 91 may be formed in another shape. The first concave portion 91 opens on the first outer peripheral surface 71b and also opens on the first end surface 71c of the tubular portion 71 facing in the negative direction along the Z axis.

The plurality of first concave portions 91 are arranged at the first pitch P ₁ around the second central axis C2. In other words, the plurality of first concave portions 91 are arranged at a constant angle (first pitch P ₁ ) around the second central axis C2. The first pitch P ₁ is an example of the first angular distance and the fourth angle θ ₄ and is an angular difference between two adjacent first concave portions 91 around the second central axis C2. In the first embodiment, the first pitch P ₁ is 25°.

Of the plurality of first recesses 91, the angle difference between two adjacent first recesses 91 may be different from the first pitch P ₁ . For example, when the first pitch P ₁ is different from a divisor of 360°, a plurality of _first pitches P ₁ are provided around the second central axis C 2 with one first recess 91 as a starting point. When the concave portion 91 is arranged, the angular difference between the first concave portion 91 which is the starting point and the first concave portion 91 which is finally arranged is different from the first pitch P ₁ .

A plurality of second recesses 92 are provided on the second inner peripheral surface 62a of the second member 62. Further, a plurality of third recesses 93 are provided on the second outer peripheral surface 62b of the second member 62. The second recess 92 and the third recess 93 may also be referred to as, for example, a groove, a recess, and a cutout.

The second recess 92 is a groove extending in the direction along the Z axis and having a substantially semicircular cross section. The second recess 92 may be formed in another shape. The radius of the second recess 92 is substantially equal to the radius of the first recess 91. The second recess 92 opens on the second inner peripheral surface 62 a and also opens on the two second end surfaces 62 c of the second member 62.

The plurality of second recesses 92 are arranged around the second central axis C2 at every second pitch P ₂ . The second pitch P ₂ is an example of the second angular distance and the third angle θ ₃ and is an angular difference between two adjacent second concave portions 92 around the second central axis C2. In the first embodiment, the second pitch P ₂ is 24°. Thus, the second pitch P ₂ is different from the first pitch P ₁ . Similar to the first recess 91, the angle difference between two adjacent second recesses 92 of the plurality of second recesses 92 may be different from the second pitch P ₂ .

The third recess 93 is a groove that extends in the direction along the Z axis and has a substantially semicircular cross section. The third recess 93 may be formed in another shape. The third recess 93 opens on the second outer peripheral surface 62b and also opens on the two second end surfaces 62c of the second member 62.

A plurality of third recess 93 is disposed in each third pitch P ₃ around the third central axis C3. The third pitch P ₃ is an example of the third angular distance and the first angle θ ₁ , and is an angular difference between two adjacent third concave portions 93 around the third central axis C3. In the first embodiment, the third pitch P ₃ is 18°. Similar to the first recess 91, the angle difference between two adjacent third recesses 93 among the plurality of third recesses 93 may be different from the third pitch P ₃ .

A plurality of fourth recesses 94 are provided on the third inner peripheral surface 63a of the third member 63. The fourth recess 94 may also be referred to as, for example, a groove, a recess, or a cutout. The fourth recess 94 is a groove extending in the direction along the Z axis and having a substantially semicircular cross section. The fourth recess 94 may be formed in another shape. The radius of the fourth recess 94 is substantially equal to the radius of the third recess 93. The fourth recess 94 opens on the third inner peripheral surface 63 a and also opens on the two third end surfaces 63 c of the third member 63.

The plurality of fourth recesses 94 are arranged at the fourth pitch P ₄ around the third central axis C3. The fourth pitch P ₄ is an example of the fourth angular distance and the second angle θ ₂ , and is an angular difference between two adjacent fourth concave portions 94 around the third central axis C3. In the first embodiment, the fourth pitch P ₄ is 19°. Thus, the fourth pitch P ₄ is different from the third pitch P ₃ . The first to fourth pitches P _{1 to} P ₄ are respectively larger than 0° and smaller than 360°. Similar to the first recess 91, the angle difference between two adjacent fourth recesses 94 among the plurality of fourth recesses 94 may be different from the fourth pitch P ₄ .

As shown in FIG. 4, the first pin 64 and the second pin 65 are formed in a substantially columnar shape. The first pin 64 and the second pin 65 may be formed in other shapes. The radius of the first pin 64 is substantially equal to the radius of the first recess 91, and is substantially equal to the radius of the second recess 92. The radius of the second pin 65 is substantially equal to the radius of the third recess 93 and substantially equal to the radius of the fourth recess 94.

As shown in FIG. 5, the first pin 64 is housed in one of the plurality of first recesses 91 and one of the plurality of second recesses 92 facing each other. The first pin 64 limits the relative rotation of the first member 61 and the second member 62 about the second central axis C2. Therefore, the first member 61 and the second member 62 transmit torque to each other and can rotate integrally around the second central axis C2.

The second pin 65 is housed in one of the plurality of third recesses 93 and one of the plurality of fourth recesses 94 that face each other. The second pin 65 restricts relative rotation of the second member 62 and the third member 63 about the third central axis C3. Therefore, the second member 62 and the third member 63 transmit torque to each other and can rotate integrally around the third central axis C3.

The first to third members 61 to 63 described above are assembled according to the position of the center of gravity of the turbofan 34 integrally formed with the third member 63. More specifically, the first to third members 61 to 63 are rotated about the centers (the second central axis C2 or the third central axis C3) with respect to each other, and the central axis of the shaft 33a of the motor 33 is It is arranged so that the position and the position of the center of gravity of the turbofan 34 match. In other words, the position of the first central axis C1 and the position of the center of gravity of the turbofan 34 are matched.

The position of the center of gravity of the turbo fan 34 is measured by placing the turbo fan 34 on three pressure sensors arranged in a triangular shape. The position of the center of gravity of the turbo fan 34 is not limited to this example, and may be measured by rotating the turbo fan 34, for example.

In a state where the position of the first central axis C1 and the position of the center of gravity of the turbofan 34 coincide with each other, one of the plurality of first recesses 91 and one of the plurality of second recesses 92 facing each other is first No. 64 is accommodated, and the second pin 65 is accommodated in one of the plurality of third recesses 93 and one of the plurality of fourth recesses 94 facing each other. As a result, the shaft 33a of the motor 33 can transmit rotation (torque) to the turbofan 34 via the first to third members 61 to 63.

The center of gravity of the turbofan 34 may be located at any position on the first central axis C1 along the Z axis. That is, the position of the center of gravity of the turbofan 34 is the position of the first central axis C1 when viewed in plan in the direction in which the first central axis C1 extends (the positive direction along the Z axis or the negative direction along the Z axis). Is matched with.

By causing the position of the first central axis C1 and the position of the center of gravity of the turbo fan 34 to coincide with each other, vibration of the rotating turbo fan 34 is suppressed. Even if the position of the first center axis C1 and the position of the center of gravity of the turbo fan 34 are different, the position of the first center axis C1 is brought closer to the position of the center of gravity of the turbo fan 34, thereby rotating the turbo fan. Vibrations occurring at 34 are reduced.

For example, when the position of the center of gravity of the turbo fan 34 is the same as the position of the third central axis C3 that is the center of the turbo fan 34 and the third member 63, the first to third members 61 to 63 are It is arranged as shown in FIG. That is, the first central axis C1 and the third central axis C3 are arranged at the same position. In this case, the position of the second central axis C2 may be different from the position shown in FIG.

By arranging the first to third members 61 to 63 as shown in FIG. 5, the position of the central axis (first central axis C1) of the shaft 33a of the motor 33 and the center of gravity of the turbofan 34 (the third central axis C3) are determined. The position of the central axis C3) substantially coincides. This suppresses vibration of the rotating turbo fan 34.

On the other hand, the position of the center of gravity of the turbofan 34 may be different from the position of the third central axis C3 due to the displacement of the third member 63 during insert molding, for example. In this case, the first to third members 61 to 63 are rotated around the center (the second central axis C2 or the third central axis C3) from the position of FIG. Hereinafter, alignment of the center of gravity CG at a position different from the third central axis C3 as shown in FIG. 5 and the first central axis C1 will be described. Note that, for convenience of description, the state where the first central axis C1 and the third central axis C3 shown in FIG. Not limited to

The center of gravity CG is at a position represented by polar coordinates (R _f , θ _f ) with the third central axis C3 as a reference. That is, the center of gravity CG is located at a distance R _f from the third central axis C3 and at a position rotated by an angle θ _f from the position shown in FIG. 5 around the third central axis C3.

FIG. 7 is a plan view showing the bush 36 on which the first member 61 of the first embodiment is rotated. As shown in FIG. 7, the first member 61 is rotated with respect to the second member 62 about the second central axis C2 over an angle θ _r1 . As a result, the distance between the first central axis C1 and the third central axis C3 changes, and the first central axis C1 is arranged at a position separated from the third central axis C3 by the distance R _f . That is, when the first member 61 rotates about the second central axis C2 with respect to the second member 62, the amount of eccentricity of the first central axis C1 with respect to the third central axis C3 is adjusted.

FIG. 8 is a plan view showing the bush 36 on which the second member 62 of the first embodiment is rotated. Next, the second member 62 is rotated with respect to the third member 63 about the third central axis C3 over an angle θ _r2 . As a result, the angle of the first central axis C1 with respect to the third central axis C3 changes, the first central axis C1 is arranged in the polar coordinates (R _f , θ _f ) and is located at the same position as the center of gravity CG. Will be placed. That is, when the second member 62 rotates about the third central axis C3 with respect to the third member 63, the eccentric angle of the first central axis C1 with respect to the third central axis C3 is adjusted. To be done.

The rotation angle θ _r1 of the first member 61 for arranging the first central axis C1 in polar coordinates (R _f , θ _f ) is calculated by the following equation (1). That is, the first member 61 is rotated about the second central axis C2 with respect to the second member 62 based on the eccentric distance R _f between the center of gravity CG and the third central axis C3.

The rotation angle θ _r2 of the second member 62 for arranging the first central axis C1 at the polar coordinates (R _f , θ _f ) is calculated by the following equation (2). That is, the second member 62 is rotated about the third central axis C3 with respect to the third member 63 based on the eccentric angle θ _f between the center of gravity CG and the third central axis C3.

By rotating the first and second members 61 and 62 as described above, the position of the central axis of the shaft 33a of the motor 33 and the position of the center of gravity CG of the turbofan 34 substantially match. In this case, the turbo fan 34 and the shaft 33a of the motor 33 are apparently eccentric to each other, but vibration of the rotating turbo fan 34 is suppressed.

FIG. 9 is a plan view showing another example of the bush 36 of the first embodiment. In the case shown in FIG. 9, the eccentric distance R _f between the center of gravity CG and the third center axis C3 is set to the maximum value at which the first center axis C1 and the center of gravity CG can be arranged at the same position by the bush 36. To be done. By rotating the first member 61 by 180 degrees with respect to the second member 62, the first central axis C1 is arranged at the same position as the center of gravity CG in the case shown in FIG.

In the case shown in FIG. 9, the eccentric distance R _f is expressed by the following equation (3).

According to the equation (3), when the eccentric distance R _f is equal to or shorter than the sum of the distance r ₁₂ and the distance r ₂₃ , the bush 36 can arrange the first central axis C1 and the center of gravity CG at the same position. Is.

As described above, the second member 62 is rotated about the second central axis C2 with respect to the first member 61 according to the position of the center of gravity CG of the turbofan 34. Then, the first pin 64 is housed in the first concave portion 91 and the second concave portion 92 which face each other, and restricts the relative rotation of the first member 61 and the second member 62. In such a first member 61 and a second member 62, the second member 62 should be attached to the first member 61 at a plurality of angles around the second central axis C2 with respect to the first member 61. Is possible.

Further, the third member 63 is rotated about the third central axis C3 with respect to the second member 62 according to the position of the center of gravity CG of the turbofan 34. Then, the second pin 65 is housed in the third concave portion 93 and the fourth concave portion 94 which face each other, and limits the relative rotation of the second member 62 and the third member 63. In such a second member 62 and a third member 63, the third member 63 should be attached to the second member 62 at a plurality of angles around the third central axis C3 with respect to the second member 62. Is possible. This makes it possible to match the position of the central axis (first central axis C1) of the shaft 33a of the motor 33 and the position of the center of gravity CG of the turbofan 34.

In the first embodiment, the angle of the second member 62 with respect to the first member 61 can be adjusted in steps of 1° around the second central axis C2. Further, the angle of the third member 63 with respect to the second member 62 can be adjusted in steps of 1° around the third central axis C3.

The first to fourth pitches P _{1 to} P ₄ are set so that the relative angles of the first to third members 61 to 63 can be adjusted in steps of 1°. Hereinafter, an example of setting the first to _fourth pitches P _{1 to} P ₄ will be described in detail. First, the third pitch P ₃ and the fourth pitch P ₄ are set as follows.

The third pitch P ₃ fourth difference [Delta] P ₃₄ between the pitch P ₄ of is set to be at least one sub-multiple of the third pitch P ₃ and the fourth pitch P _4. The difference ΔP ₃₄ is an example of the first difference and the difference Δθ ₁₂ .

The difference ΔP ₃₄ is an absolute value of a value obtained by subtracting the _fourth pitch P ₄ from the _third pitch P ₃ . In the first embodiment, the difference ΔP ₃₄ between 18° that is the third pitch P ₃ and 19° that is the fourth pitch P ₄ is 1°. Therefore, the difference ΔP ₃₄ is a divisor of the third pitch P _{3 and} a divisor of the fourth pitch P ₄ . The difference ΔP ₃₄ equally divides the _third pitch P ₃ into n _a .

Further, at least one of the third pitch P ₃ and the fourth pitch P ₄ is set to be a divisor of 360°. In the present embodiment, the third pitch P ₃ of 18° is a divisor of 360°. The third pitch P ₃ divides 360° into n _b equal parts. The third pitch P ₃ may be different from a divisor of 360°.

In the first embodiment, the difference ΔP ₃₄ is a divisor of 360°. In this case, the third pitch P ₃ and the fourth pitch P ₄ are set so as to satisfy the following (Formula 4).

In the first embodiment, the value obtained by the expression (4) is about −2.056, which is 0 or less. Therefore, the third pitch P ₃ and the fourth pitch P ₄ in the first embodiment satisfy the equation (4).

When the difference ΔP ₃₄ is different from the divisor of 360°, the third pitch P ₃ and the fourth pitch P ₄ are set so as to satisfy the following (Equation 5).

When the third pitch P ₃ and the fourth pitch P ₄ satisfy the expression (4) or the expression (5), the third member 63 with respect to the second member 62 can be around the third central axis C3. The position (angle) can be adjusted without any shortage over the entire circumference around the third central axis C3 with the difference ΔP ₃₄ as a unit. In other words, the angle of the third member 63 with respect to the adjustable second member 62 is provided by 360° in steps of 1°.

There may be a plurality of combinations of the third pitch P ₃ and the fourth pitch P ₄ that satisfy the equation (4) or the equation (5). Among the plurality of combinations, the closer the value obtained from the expression (4) or the expression (5) is to 0, the smaller the number of the third recesses 93 and the fourth recesses 94.

The combination of the first embodiment of the third pitch _P 3 (18 °) and the fourth pitch _P 4 (19 °), when the difference [Delta] P ₃₄ is 1 °, the third pitch _{P 3} and the fourth Among the plurality of combinations of the pitch P ₄ of, the value of the formula (4) is the closest to 0. Therefore, the combination of the third pitch P ₃ and the fourth pitch P ₄ in the first embodiment is the combination in which the number of the third recesses 93 and the fourth recesses 94 is the smallest.

Similarly, when the difference [Delta] P ₃₄ differs from a divisor of 360 °, the third pitch _{P 3} and the fourth combination of the pitch _{P 4,} the third pitch _{P 3} and the fourth plurality of combinations of pitch _{P 4} Among them, the value of the expression (5) is set to a combination that is closest to zero. In this case, the combination of the third pitch P ₃ and the fourth pitch P _{4 is} the combination in which the number of the third recesses 93 and the fourth recesses 94 is the smallest.

When the third pitch P ₃ and the fourth pitch P ₄ are set, the first pitch P ₁ and the second pitch P ₂ are set as follows.

First pitch P ₁ and the difference [Delta] P ₁₂ of the second pitch P ₂ is set to be at least one sub-multiple of the first pitch P ₁ and a second pitch P _2. The difference ΔP ₁₂ is an example of the second difference and the difference Δθ ₃₄ .

The difference ΔP ₁₂ is the absolute value of the value obtained by subtracting the _second pitch P ₂ from the _first pitch P ₁ . In the first embodiment, the difference ΔP ₁₂ between the first pitch P ₁ of 25° and the second pitch P ₂ of 24° is 1°. Therefore, the difference ΔP ₁₂ is a divisor of the first pitch P _{1 and} a divisor of the second pitch P ₂ . The difference ΔP ₁₂ equally divides the _second pitch P ₂ by n _c .

Further, at least one of the first pitch P ₁ and the second pitch P ₂ is set to be a divisor of 360°. In the present embodiment, the second pitch P ₂ of 24° is a divisor of 360°. Furthermore, the second pitch _{P 2} is equal 1 / 2n _d of 360 °. The second pitch P ₂ may be different from a divisor of 360°.

In the first embodiment, the difference ΔP ₁₂ is a divisor of 360°, and the number of the first concave portions 91 is N. In this case, the first pitch P ₁ and the second pitch P ₂ are set so as to satisfy the following equations (6) and (7).

As described above, the first member 61 is rotated with respect to the second member 62 about the second central axis C2 over the angle θ _r1 , so that the first center with respect to the third central axis C3. The eccentric distance of the axis C1 can be made equal to the eccentric distance R _f of the center of gravity CG. As shown in the equation (1), the eccentric distance R _f is a function of the cosine of the angle θ _r1 . The cosine function is symmetric at 180°. Therefore, by the second pitch _{P 2} is set to the 360 ° 1 / 2n _d aliquoted, sets a first pitch _{P 1} and a second pitch _{P 2} as shown in (6) below, a plurality The overlapping of the angles obtained by the combination of the first concave portion 91 and the plurality of second concave portions 92 is suppressed. That is, the number of the plurality of first recesses 91 and the plurality of second recesses 92 can be reduced.

In the first embodiment, the value obtained by the expression (6) is about −6.042, which is 0 or less. Therefore, the first pitch P ₁ and the second pitch P ₂ in the first embodiment satisfy the equation (6). In addition, in the first embodiment, the first pitch P ₁ and the second pitch P ₂ also satisfy the expression (7).

When 360°/ΔP ₁₂ is an odd number, the first pitch P ₁ and the second pitch P ₂ are set so as to satisfy the following (Equation 8), and only one first recess 91 is provided. May be provided on the first outer peripheral surface 71b. For example, if ΔP ₁₂ is 8°, 24°, 40°, 72°, or 120°, 360°/ΔP ₁₂ is an odd number.

On the other hand, when the difference ΔP ₁₂ is different from a divisor of 360°, the first pitch P ₁ and the second pitch P ₂ are set so as to satisfy the following formula (Equation 9).

When the first pitch P ₁ and the second pitch P ₂ satisfy the equations (6) and (7), or the equation (8), or satisfy the equation (9), the first member The position (angle) of the second member 62 around the second central axis C2 with respect to 61 can be adjusted without any shortage over the entire circumference around the second central axis C2 in units of the difference ΔP ₁₂ .

There may be a plurality of combinations of the first pitch P ₁ and the second pitch P ₂ that satisfy the equations (6) and (7) or the equation (9). Among the plurality of combinations, the closer the value obtained from the expression (6) or the expression (9) is to 0, the smaller the number of the first recesses 91 and the second recesses 92.

In the combination of the first pitch P ₁ (25°) and the second pitch P ₂ (24°) in the first embodiment, when the difference ΔP ₁₂ is 1°, the first pitch P ₁ and the second pitch P 2 Among the plurality of combinations of the pitch P ₂ of, the value of the formula (6) is the closest to 0. Therefore, the combination of the first pitch P ₁ and the second pitch P ₂ in the first embodiment is the combination in which the number of the first concave portions 91 and the second concave portions 92 is the smallest.

When 360°/ΔP ₁₂ is an odd number, the combination of the first pitch P ₁ and the second pitch P ₂ satisfying the expression (8) has the smallest number of the first concave portions 91 and the second concave portions 92. Can be a combination of In this case, for example, the (6) and (7) first satisfying equation pitch _{P 1} and a second pitch _{P 2,} a first pitch _{P 1} and a second satisfying equation (8) a pitch P _2, better less is selected the number of the plurality of first recess 91 and a plurality of second recesses 92 of the. For example, when ΔP ₁₂ is 72°, the combination of the first pitch P ₁ and the second pitch P ₂ satisfying the expression (8) is the plurality of first recesses 91 and the plurality of second recesses 92. Is the combination that minimizes the number of.

On the other hand, when the difference [Delta] P ₁₂ differs from a divisor of 360 °, the first pitch _{P 1} and a second combination of the pitch _{P 2} is the first pitch _{P 1} and a second plurality of combinations of pitch _{P 2} Among them, the value of the expression (9) is set to a combination that is closest to zero. In this case, the combination of the first pitch P ₁ and the second pitch P _{2 is} the combination in which the number of the first concave portions 91 and the second concave portions 92 is the smallest.

In the air conditioner 10 including the bush 36 according to the first embodiment described above, the first central axis C1 of the first inner peripheral surface 71a of the first member 61 is the same as the first central axis C1 of the first outer peripheral surface 71b. It is eccentric from the central axis C2 of 2. Further, the second central axis C2 of the second inner peripheral surface 62a of the second member 62 is eccentric from the third central axis C3 of the second outer peripheral surface 62b. Then, the first member 61 is housed in the second hole 81 of the second member 62, and the second member 62 is housed in the third hole 85 of the third member 63. The second member 62 is arranged at a desired angle about the second central axis C2 with respect to the first member 61, and is rotated about the second central axis C2 with the first member 61 by the first pin 64. Be restricted. The third member 63 is arranged at a desired angle around the third central axis C3 with respect to the second member 62, and is rotated about the third central axis C3 with the second member 62 by the second pin 65. Be restricted. Accordingly, the position of the third central axis C3 can be arranged at a position that coincides with the first central axis C1 or at a desired position different from the first central axis C1. Therefore, for example, the position of the first central axis C1 can be aligned with the center of gravity CG of the bush 36, and the vibration of the turbofan 34 to which the bush 36 is attached is suppressed. Therefore, generation of noise due to vibration is suppressed.

Further, the first pin 64 has one of the plurality of first concave portions 91 arranged at the first pitch P ₁ around the second central axis C2 and the first pin 64 around the second central axis C2. _{One of} the plurality of second recesses 92 arranged at each second pitch P ₂ different from the pitch P ₁ and accommodated in one of the plurality of second recesses 92, and restricts relative rotation between the first member 61 and the second member 62. To do. Thus, the position (angle) of the second member 62 about the second central axis C2 with respect to the first member 61 is defined with the difference ΔP ₁₂ between the _first pitch P ₁ and the second pitch P ₂ as a unit. , Can be adjusted more finely.

The second pin 65 has one of a plurality of third recesses 93 arranged at a _third pitch P ₃ around the third central axis C3, and a third pitch P around the third central axis C3. _{The third} concave portion 94 is housed in one of the plurality of fourth concave portions 94 arranged at a _fourth pitch P ₄ different from _3, and limits the relative rotation of the second member 62 and the third member 63. Thus, the position (angle) of the third member 63 about the third central axis C3 with respect to the second member 62 is defined with the difference ΔP ₃₄ between the _third pitch P ₃ and the fourth pitch P ₄ as a unit. , Can be adjusted more finely.

The distance r ₁₂ between the first central axis C1 and the second central axis C2 is equal to the distance r ₂₃ between the second central axis C2 and the third central axis C3. As a result, the third central axis C3 can be arranged at a position that coincides with the first central axis C1.

Difference [Delta] P ₃₄ of the third pitch _{P 3} and the fourth pitch _{P 4} is a divisor of at least one of the third pitch _{P 3} and the fourth pitch _{P 4.} That is, it is possible to equally divide the third pitch P ₃ or the fourth pitch P ₄ by the difference ΔP ₃₄ . Therefore, the position (angle) of the third member 63 about the third central axis C3 with respect to the second member 62 should be adjusted over the entire circumference around the third central axis C3 in units of the difference ΔP _34. You can

At least one of the third pitch P ₃ and the fourth pitch P ₄ is a divisor of 360°. Thereby, the position (angle) of the third member 63 around the third central axis C3 with respect to the second member 62 can be adjusted over the entire circumference around the third central axis C3 in units of the difference ΔP _34. When arranging the plurality of third recesses 93 and the plurality of fourth recesses 94 in the, it is possible to further reduce the number of the third recesses 93 and the fourth recesses 94. Therefore, the third recess 93 and the fourth recess 94 can be easily formed, and the bush 36 can be easily assembled.

The third pitch P ₃ is equally divided by n _a by the difference ΔP ₃₄ between the _third pitch P ₃ and the fourth pitch P _4, and the third pitch P ₃ equally divides 360° by n _b . Furthermore, when the difference ΔP ₃₄ is a divisor of 360°, the combination of the third pitch P ₃ and the fourth pitch P ₄ satisfies the expression (4), and the difference ΔP ₃₄ is different from the divisor of 360°. In this case, the combination of the third pitch P ₃ and the fourth pitch P ₄ satisfies the equation (5). The combination of the third pitch P ₃ and the fourth pitch P ₄ is a third pitch P ₃ and the fourth of the at least one combination of pitch P ₄ (Expression 4) or (5) formula Is a combination whose value of is closest to zero. Accordingly, the position (angle) of the third member 63 about the third central axis C3 with respect to the second member 62 is not insufficient over the entire circumference around the third central axis C3 in units of the difference ΔP _34. The number of the third recesses 93 and the fourth recesses 94 can be reduced while the adjustment can be performed. Therefore, the third recess 93 and the fourth recess 94 can be easily formed, and the bush 36 can be easily assembled.

First pitch _{P 1} and the second difference [Delta] P ₁₂ between the pitch _{P 2} is a divisor of at least one of the first pitch _{P 1} and a second pitch _{P 2.} That is, it is possible to equally divide the first pitch P ₁ or the second pitch P ₂ by the difference ΔP ₁₂ . Therefore, the position (angle) of the second member 62 around the second central axis C2 with respect to the first member 61 is adjusted over the entire circumference around the second central axis C2 in units of the difference ΔP _12. You can

At least one of the first pitch P ₁ and the second pitch P ₂ is a divisor of 360°. Accordingly, the position (angle) of the second member 62 around the second central axis C2 with respect to the first member 61 can be adjusted in units of the difference ΔP ₁₂ and the plurality of first recesses 91 and the plurality of second recesses 91. When arranging the recesses 92, the number of the first recesses 91 and the second recesses 92 can be further reduced. Therefore, the first recess 91 and the second recess 92 can be easily formed, and the bush 36 can be easily assembled.

The second pitch P ₂ is equally divided by n _c by the difference ΔP ₁₂ between the _second pitch P ₂ and the first pitch P _1, and the second pitch P ₂ is evenly divided by 360° by 1/2 n _d. To do. Further, when the difference ΔP ₁₂ is a divisor of 360° and the number of the plurality of first concave portions 91 arranged at the first pitch P ₁ around the second central axis C2 is N, the first difference is obtained. When the combination of the pitch P _{1 of 1} and the second pitch P ₂ satisfies the expressions (6) and (7) and the difference ΔP ₁₂ is different from a divisor of 360°, the first pitch P ₁ and the second pitch P ₂ The combination of _two pitches P ₂ satisfies the formula (9). The first pitch P ₁ and a second combination of the pitch P ₂ is, first pitch P ₁ and a second of the at least one combination of pitch P ₂ (6) or formula (9) below Is a combination whose value of is closest to zero. Thereby, the position (angle) of the second member 62 around the second central axis C2 with respect to the first member 61 can be adjusted in units of the difference ΔP ₁₂ , and the first concave portion 91 and the second concave portion 91 can be adjusted. The number of recesses 92 can be reduced. Therefore, the first recess 91 and the second recess 92 can be easily formed, and the bush 36 can be easily assembled.

Second pitch _{P 2} between the first difference [Delta] P ₁₂ between the pitch _{P 1} is a divisor of the second pitch _{P 2,} a submultiple of the second pitch _{P 2} is 360 °, the difference [Delta] P ₁₂ is It is a divisor of 360°. Then, when the value obtained by dividing 360° by the difference ΔP ₁₂ is an odd number, the expression (8) is satisfied and the number of the first concave portions 91 is one. Thereby, the position (angle) of the second member 62 around the second central axis C2 with respect to the first member 61 can be adjusted in units of the difference ΔP ₁₂ , and the first concave portion 91 and the second concave portion 91 can be adjusted. The number of recesses 92 can be reduced. Therefore, the first recess 91 and the second recess 92 can be easily formed, and the bush 36 can be easily assembled.

(Second embodiment)
The second embodiment will be described below with reference to FIG. In the following description of a plurality of embodiments, components having the same functions as the components already described are given the same reference numerals as the components already described, and further description may be omitted. .. Further, a plurality of constituent elements to which the same reference numerals are assigned do not necessarily have common functions and properties, and may have different functions and properties according to each embodiment.

FIG. 10 is a plan view showing a part of the bush 36 according to the second embodiment. As shown in FIG. 10, in the second embodiment, the first pitch P ₁ is 21°, the second pitch P ₂ is 20°, the third pitch P ₃ is 15°, The fourth pitch P ₄ is 16°.

The first pitch P ₁ and the second pitch P _{2 of} the second embodiment satisfy the equations (6) and (7). However, in the second embodiment, the number of the first recesses 91 and the second recesses 92 is larger than that in the first embodiment.

The third pitch P ₃ and the fourth pitch P ₄ of the second embodiment satisfy the equation (4). However, in the second embodiment, the number of third recesses 93 and fourth recesses 94 is larger than that in the first embodiment.

As in the second embodiment described above, the combination of the first pitch P ₁ and the second pitch P ₂ satisfying the equations (6) and (7) is represented by the equation (6) and ( The value obtained from the expression (7) may be different from the combination closest to zero. Further, the combination of the third pitch P ₃ and the fourth pitch P ₄ satisfying the expression (4) may be different from the combination whose value obtained from the expression (4) is closest to zero.

According to the air conditioner 10 including the bush 36 of the second embodiment, the plurality of first recesses 91 and the plurality of second recesses 92 face each other. Thereby, the plurality of first pins 64 can be housed in the first recess 91 and the second recess 92, and the relative rotation of the first member 61 and the second member 62 can be more reliably performed. Can be limited to Further, the plurality of third recesses 93 and the plurality of fourth recesses 94 face each other. Accordingly, the plurality of second pins 65 can be housed in the third recess 93 and the fourth recess 94, and the relative rotation between the second member 62 and the third member 63 can be more reliably performed. Can be limited to

(Third Embodiment)
The third embodiment will be described below with reference to FIG. FIG. 11 is a plan view showing a part of the bush 36 according to the third embodiment. As shown in FIG. 11, in the third embodiment, the first pitch P ₁ is 38°, the second pitch P ₂ is 36°, the third pitch P ₃ is 24°, The fourth pitch P ₄ is 26°.

In the third embodiment, the difference ΔP ₃₄ between the _third pitch P ₃ and the fourth pitch P ₄ is 2°. The third pitch P ₃ and the fourth pitch P ₄ satisfy the equation (4). Therefore, the angle of the third member 63 with respect to the adjustable second member 62 is provided by 360° in 2° steps.

In the third embodiment, the difference ΔP ₁₂ between the _first pitch P ₁ and the second pitch P ₂ is 2°. The first pitch P ₁ and the second pitch P ₂ satisfy the equations (6) and (7). Therefore, the angle of the second member 62 with respect to the adjustable first member 61 is provided in 360° increments of 2°.

In the air conditioner 10 including the bush 36 according to the third embodiment described above, the difference ΔP ₁₂ between the _first pitch P ₁ and the second pitch P ₂ is set to 2°, and the third pitch P 2 is set. The difference ΔP ₃₄ between ₃ and the fourth pitch P ₄ is set to 2°. Thereby, the relative angles of the first to third members 61 to 63 can be adjusted in steps of 2°.

(Fourth Embodiment)
The fourth embodiment will be described below with reference to FIG. FIG. 12 is a plan view showing a part of the bush 36 according to the fourth embodiment. As shown in FIG. 12, in the fourth embodiment, the first pitch P ₁ is 48°, the second pitch P ₂ is 45°, the third pitch P ₃ is 30°, The fourth pitch P ₄ is 33°.

In the fourth embodiment, the difference ΔP ₃₄ between the _third pitch P ₃ and the fourth pitch P ₄ is 3°. The third pitch P ₃ and the fourth pitch P ₄ satisfy the equation (4). Therefore, the angle of the third member 63 with respect to the adjustable second member 62 is provided in 360° increments of 3°.

In the fourth embodiment, the difference ΔP ₁₂ between the _first pitch P ₁ and the second pitch P ₂ is 3°. The first pitch P ₁ and the second pitch P ₂ satisfy the equations (6) and (7). Therefore, the angle of the second member 62 with respect to the adjustable first member 61 is provided by 360° in increments of 3°.

In the air conditioner 10 including the bush 36 according to the fourth embodiment described above, the difference ΔP ₁₂ between the _first pitch P ₁ and the second pitch P ₂ is set to 3°, and the third pitch P ₂ is set. The difference ΔP ₃₄ between ₃ and the fourth pitch P ₄ is set to 3°. Thereby, the relative angles of the first to third members 61 to 63 can be adjusted in 3° steps.

According to at least one embodiment described above, the first limiting member has one of the plurality of first concave portions arranged at the first angular distance around the second central axis, and the second limiting member. Relative rotation between the first member and the second member, which is housed in one of the plurality of second concave portions arranged for each second angular distance different from the first angular distance around the central axis. To limit. Thereby, the position (angle) of the second member around the second central axis with respect to the first member can be adjusted more finely with the difference between the first angular distance and the second angular distance as a unit. it can.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the scope of equivalents thereof.

10... Air conditioner, 33... Motor, 33a... Shaft, 34... Turbo fan, 36... Bushing, 61... First member, 62... Second member, 62a... Second inner peripheral surface, 62b... Second Outer peripheral surface, 63... Third member, 63a... Third inner peripheral surface, 64... First pin, 65... Second pin, 71... Cylindrical portion, 71a... First inner peripheral surface, 71b... 1 outer peripheral surface, 75... 1st hole, 81... 2nd hole, 85... 3rd hole, 91... 1st recessed part, 92... 2nd recessed part, 93... 3rd recessed part, 94... 4 of the recess, C1 ... first central axis, C2 ... second central axis, C3 ... third central axis, CG ... centroid, P 1 _... first pitch, P 2 _... second pitch, _{P 3} ... third pitch, P 4 _... fourth pitch, ΔP _12, ΔP _{34 ...} difference.

Claims (12)

A first inner peripheral surface extending around a first central axis and a first inner peripheral surface located opposite to the first inner peripheral surface and extending around a second central axis different from the first central axis. An outer peripheral surface of, and at least a part of the first inner peripheral surface forms a first hole, and a first corner is formed on the first outer peripheral surface about the second central axis. A first member provided with at least one first recess arranged at every distance;
A second inner peripheral surface extending around the second central axis and a third central axis located opposite to the second inner peripheral surface and different from the second central axis. Two outer peripheral surfaces, and at least a part of the second inner peripheral surface forms a second hole configured to house the first member and is housed in the second hole. A second corner different from the first angular distance about the second central axis on the second inner peripheral surface, the second corner being configured to contact the first outer peripheral surface of the first member. At least one second concave portion arranged for each distance is provided, and at least one third concave portion arranged for each third angular distance around the third central axis on the second outer peripheral surface. A second member provided with
It has a third inner peripheral surface extending about the third central axis, and at least a part of the third inner peripheral surface has a third hole configured to accommodate the second member. Forming and contacting the second outer peripheral surface of the second member housed in the third hole, the third inner peripheral surface having the third corner around the third central axis. A third member provided with at least one fourth recess arranged at every fourth angular distance different from the distance;
A first recess housed in one of the first recesses and one of the second recesses facing each other to restrict rotation of the first member and the second member about the second central axis; Restriction member,
A second member that is housed in one of the third recesses and one of the fourth recesses that face each other and restricts rotation of the second member and the third member about the third central axis. Restriction member,
Mounting structure that includes. The first central axis, the second central axis and the third central axis are parallel to each other,
The mounting structure according to claim 1, wherein a distance between the first central axis and the second central axis is equal to a distance between the second central axis and the third central axis. The mounting structure according to claim 2, wherein the first difference between the third angular distance and the fourth angular distance is a divisor of at least one of the third angular distance and the fourth angular distance. .. The mounting structure according to claim 3, wherein at least one of the third angular distance and the fourth angular distance is a divisor of 360°. One first angle theta ₁ is one of the third angular distance and said fourth angular distance, among the first angle theta ₁ and the third angular distance and said fourth angular distance N _{1 is} equally divided by the difference Δθ _{12 from} the second angle θ ₂ which is the other of
The first angle θ ₁ divides 360° into n ₂ equal parts,
When the difference Δθ ₁₂ is a divisor of 360°, the combination of the first angle θ ₁ and the second angle θ ₂ satisfies the following formula (1) of Formula 1, and the first angle θ 1 Of at least one of the angle θ ₁ and the second angle θ ₂ of Equation (1), the value of Equation (1) of Equation 1 is the closest to 0,

When the difference Δθ ₁₂ is different from a divisor of 360°, the combination of the first angle θ ₁ and the second angle θ ₂ satisfies the following expression (2) of the equation 2, and the first the value of the angle theta ₁ and the second angle theta ₂ of at least one of the number 2 in the formula of the combination (2) is a combination closest to 0,

The mounting structure according to claim 4. The second difference between the first angular distance and the second angular distance is a divisor of at least one of the first angular distance and the second angular distance. Any one of 5 mounting structure. The mounting structure according to claim 6, wherein at least one of the first angular distance and the second angular distance is a divisor of 360°. The third angle θ ₃ that is one of the first angular distance and the second angular distance is the third angle θ ₃ and the first angular distance and the second angular distance. N _{3 is} equally divided by the difference Δθ _{34 from} the fourth angle θ ₄ which is the other of
The third angle θ ₃ divides 360° into 1/2n ₄ equal parts,
The difference Δθ ₃₄ is a divisor of 360°, and the number of the first recesses or the second recesses arranged around the second central axis for each of the fourth angles θ ₄ is N. And the combination of the third angle θ ₃ and the fourth angle θ ₄ satisfies the following equations (3) and (4), and the third angle Of at least one combination of θ ₃ and the fourth angle θ ₄ , the value of the formula (3) of the equation 3 is the closest to 0,

When the difference Δθ ₃₄ is different from a divisor of 360°, the combination of the third angle θ ₃ and the fourth angle θ ₄ satisfies the following expression (5) of the expression 5 and the third Of at least one of the angle θ ₃ and the fourth angle θ ₄ of Equation (5), the value of Equation (5) of Equation 5 is the closest to 0.

The mounting structure according to claim 7. A third angle θ _{3 that} is one of the first angular distance and the second angular distance, and a fourth angle that is the other of the first angular distance and the second angular distance. The difference Δθ _{34 from} θ ₄ is a divisor of the third angle θ ₃ , and
The third angle θ ₃ is a divisor of 360°,
The difference Δθ ₃₄ is a divisor of 360°,
When a value obtained by dividing 360° by the difference Δθ ₃₄ is an odd number, the following Expression (6) is satisfied, and the first concave portion or the first concave portion arranged for each of the fourth angles θ ₄ is satisfied. The number of recesses of 2 is one,

The mounting structure according to claim 7. A mounting structure according to any one of claims 1 to 9,
A power source having a shaft that is inserted through the first hole and capable of rotating the shaft;
A rotating machine equipped with. A mounting structure according to any one of claims 1 to 9,
A power source having a shaft that is inserted through the first hole and capable of rotating the shaft;
A fan connected to the third member,
An air conditioning device comprising: A first inner peripheral surface extending around a first central axis, a first inner peripheral surface opposite to the first inner peripheral surface, different from the first central axis, and parallel to the first central axis; A first outer peripheral surface extending about the central axis of 2 and at least a part of the first inner peripheral surface forms a first hole, and the first outer peripheral surface has the first outer surface. A first member provided with at least one first concave portion arranged at every first angular distance around the central axis of 2;
A second inner peripheral surface extending about the second central axis, a second inner peripheral surface opposite to the second inner peripheral surface, different from the second central axis, and parallel to the second central axis; A second outer peripheral surface extending about a third central axis, and at least a part of the second inner peripheral surface has a second hole configured to accommodate the first member. It is formed so as to come into contact with the first outer peripheral surface of the first member housed in the second hole, and is formed on the second inner peripheral surface around the second central axis. At least one second concave portion arranged for each second angular distance different from the first angular distance, and for each third angular distance about the third central axis on the second outer peripheral surface. A second member provided with at least one third recess disposed therein;
It has a third inner peripheral surface extending about the third central axis, and at least a part of the third inner peripheral surface has a third hole configured to accommodate the second member. Forming and contacting the second outer peripheral surface of the second member housed in the third hole, the third inner peripheral surface having the third corner around the third central axis. A third member provided with at least one fourth recess arranged at every fourth angular distance different from the distance;
And a first distance between the first central axis and the second central axis is equal to a second distance r between the second central axis and the third central axis. , A method of adjusting the mounting structure,
From the state where the first central axis coincides with the third central axis, the center of gravity of the mounting structure represented by polar coordinates (R _f , θ _f ) on the basis of the third central axis and the third center axis. Based on an eccentric distance R _{f from} the center axis of the first member, an angle θ _{r1 with} respect to the second member that satisfies the following expression (7) of the following formula 7 around the second center axis. Rotate over

Based on the eccentric angle θ _f between the third central axis and the center of gravity, the second member is moved with respect to the third member about the third central axis by the following formula (8). Rotate over an angle θ _r2 that satisfies

A first limiting member is housed in one of the first recesses and one of the second recesses facing each other, and the first member and the second member are relatively arranged around the second central axis. Limit spinning to
A second limiting member is housed in one of the third recesses and one of the fourth recesses facing each other, and the second member and the third member are relatively arranged around the third central axis. Limit spinning to,
Adjustment method including that.

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