KR102124807B1 - Installation structure, rotary machine, air conditioner, and adjustment method - Google Patents

Abstract

It provides an installation structure capable of suppressing vibration. The installation structure according to one embodiment includes first to third members, and first and second limiting members. The first member is provided with a first recess on the first outer surface, which is disposed at every first angular distance around the second axis. The second member is provided on the second inner surface with a second concave portion disposed around the second axis at a second angular distance different from the first angular distance, and on the second outer surface with a third angular distance around the third axis. The disposed third recess is provided. The third member is provided on a third inner surface with a fourth recess disposed around the third axis at a fourth angular distance different from the third angular distance. The first limiting member is accommodated in the first recess and the second recess. The second limiting member is accommodated in the third recess and the fourth recess.

Description

INSTALLATION STRUCTURE, ROTARY MACHINE, AIR ADJUSTMENT AND ADJUSTMENT METHOD {INSTALLATION STRUCTURE, ROTARY MACHINE, AIR CONDITIONER, AND ADJUSTMENT METHOD}

An embodiment of the present invention relates to an installation structure, a rotating machine, an air conditioner, and an adjustment method.

In a rotating machine that rotates a rotating object such as a fan, the shaft of a power source such as a motor and the rotating object such as a fan are connected by an installation structure. For example, a shaft is inserted through a hole formed in the installation structure, and a rotating object is connected to the outer circumference of the installation structure.

Japanese Patent Publication No. 2012-92810

The center of gravity of the rotating body may be eccentric with respect to the shaft. In this case, when the rotating body rotates, there is a fear that vibration occurs in the rotating body.

The installation 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 surface extending about a first axis, and a first outer surface extending about a second axis different from the first axis while being located on the opposite side of the first inner surface, At least a portion of the first inner surface forms a first hole, and the first outer surface is provided with at least one first concave portion disposed at every first angular distance around the second axis. The second member has a second inner surface extending around the second axis, and a second outer surface extending around a third axis different from the second axis while being located on the opposite side of the second inner surface. , Wherein at least a portion of the second inner surface is configured to contact the first outer surface of the first member accommodated in the second hole while forming a second hole configured to receive the first member, and the second On the inner surface, at least one second concave portion disposed at every second angular distance different from the first angular distance is provided around the second axis, and at least one disposed at every third angular distance around the third axis on the second outer surface The third recess is provided. The third member has a third inner surface extending about the third axis, and at least a portion of the third inner surface forms a third hole configured to receive the second member, and the third hole At least one fourth concave portion, which is in contact with the second outer surface of the second member accommodated in, and is disposed at a fourth angular distance different from the third angular distance around the third axis, is provided on the third inner surface. The first restriction member is accommodated in one of the opposing first concave portions and one of the second concave portions, and restricts the first member and the second member from rotating about the second axis. The second limiting member is accommodated in one of the opposing third recesses and the fourth recess, and limits the rotation of the second member and the third member around the third axis.

1 is a perspective view showing an air conditioner according to a first embodiment.
2 is a perspective view showing the main body of the indoor unit according to the first embodiment.
3 is a cross-sectional view showing the main body of the indoor unit according to the first embodiment.
4 is a perspective view schematically showing an exploded shaft and bush of a motor according to the first embodiment.
5 is a plan view showing the bush of the first embodiment.
6 is a plan view showing a part of the bush of the first embodiment.
7 is a plan view showing a bush in which the first member of the first embodiment is rotated.
8 is a plan view showing a bush in which the second member of the first embodiment is rotated.
9 is a plan view showing another example of the bush of the first embodiment.
10 is a plan view showing a part of the bush according to the second embodiment.
11 is a plan view showing a part of the bush according to the third embodiment.
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 for the component according to the embodiment and the description of the component. Components and descriptions in plural expressions may be different expressions that are not described. In addition, elements and descriptions that are not in a plurality of expressions may be in other expressions that are not described.

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 rotating machine, and may be referred to as an air conditioner, for example. Further, the rotating machine is not limited to the air conditioner 10, and may be a machine having an industrial motor, a household electric machine such as a fan and a washing machine, or another machine having a power source and a rotating body.

As shown in each figure, in this specification, X-axis, Y-axis and Z-axis are defined. The X axis, the Y axis, and the Z axis are orthogonal to each other. The X-axis follows the width of the air conditioner 10. The Y axis is along the length (depth) of the air conditioner 10. The Z-axis follows 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 or a control device that controls the indoor unit 11 and the outdoor unit. Further, 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 mounted on the ceiling of the room where the indoor unit 11 is installed, for example. On the cover 21, a plurality of intake ports 25 and a plurality of delivery ports 26 are provided. The air supply mechanism 26 can be opened and closed by, for example, a louver.

2 is a perspective view showing the main body 22 of the indoor unit 11 of the first embodiment. 3 is a cross-sectional view showing the main body 22 of the indoor unit 11 of the first embodiment. 2 and 3, the main body 22 includes 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 also be referred to as a centrifugal fan, for example. Further, the rotating body is not limited to the turbo fan 34, and may be, for example, another fan such as a propeller fan, or another rotating body such as a gear or pulley. The bush 36 is an example of an installation structure, and may be called, for example, a connecting part, a bearing, or a member.

As shown in Fig. 3, the housing 31 is formed 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 spreading on the X-Y plane. The upper wall 41 may be formed with ribs for improving the rigidity of the upper wall 41, for example. The peripheral wall 42 is formed in a cylindrical shape extending from the edge of the upper wall 41 in the negative direction along the Z-axis (opposite direction of the Z-axis, in the lower direction).

Inside the housing 31, a blower path 45 is installed. The blower path 45 may be formed of the housing 31 or may be formed of, for example, a member mounted inside the housing 31. The upper wall 41 has an inner surface 41a facing the blower path 45. The inner surface 41a faces the negative direction along the Z axis.

The heat exchanger 32 is disposed in the blower furnace 45. The heat exchanger 32 is, for example, mounted on the inner surface 41a of the upper wall 41 and formed in a cylindrical shape extending in the negative direction along the Z axis. The heat exchanger 32 has, for example, a tube or fin through which a refrigerant flows. The heat exchanger 32 causes heat exchange between the air passing through the heat exchanger 32 and the refrigerant, and heats or cools the air. Also, the heat exchanger 32 is not limited to this example.

The motor 33 is, for example, a DC motor capable of changing the number of revolutions 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 a bolt extending from the inner surface 41a by a nut.

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

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

The hub 51 is formed in a cylindrical shape extending in the direction along the Z axis. The hub 51 is attached to the shaft 33a of the motor 33 through the bush 36. The support part 52 is formed in an annular shape spreading on the X-Y plane. The support part 52 is disposed closer to the upper wall 41 than the hub 51 and surrounds the motor 33.

The connecting portion 53 is formed, for example, in a substantially conical cylindrical 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 spread over the X-Y plane, and is connected to the ends of the plurality of blades 54.

The motor 33 rotates the turbo fan 34 by rotating the shaft 33a. As shown by the arrow in FIG. 3, the rotating turbo fan 34 draws air from the room 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 from the air supply 26 of FIG. 1.

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

4 is a perspective view schematically showing an exploded shaft 33a and a bush 36 of the motor 33 of the first embodiment. 4 shows a cross section of the bush 36. As shown in Fig. 4, the bush 36 includes 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 the 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, for example, 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 cylinder portion 71 and a flange portion 72. The cylindrical portion 71 is formed in a substantially cylindrical shape extending in the direction along the Z axis. Due to this, a first hole 75 extending in the direction along the Z axis and penetrating the cylinder 71 is formed in the cylinder 71. Moreover, the 1st hole 75 is not limited to the hole which penetrates the cylinder part 71, The bottom hole may be sufficient as it.

5 is a plan view showing the bush 36 of the first embodiment. As shown in FIG. 5, the 1st hole 75 has a substantially circular cross section centered on the 1st central axis C1. The first central axis C1 is an example of the first axis. 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 extending around the first central axis C1. In the present embodiment, the first central axis C1 substantially coincides with the central axis of the axis 33a of the motor 33. For this reason, the 1st central axis C1 may be called a rotation center.

As shown in Fig. 4, the cylinder 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 an example of the first inner surface. The first outer peripheral surface 71b is an example of the first outer surface. The first inner peripheral surface 71a is a substantially cylindrical surface that divides (regulates) the first hole 75 and extends around the first central axis C1. In other words, the first inner peripheral surface 71a forms a first hole 75. In addition, a part of the first inner peripheral surface 71a may form the first hole 75. According to another expression, the first inner circumferential surface 71a is a substantially cylindrical surface extending around the first central axis C1. The first inner peripheral surface 71a faces the inside of the first hole 75. The first hole 75 is formed 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. 5, the 1st outer peripheral surface 71b is a substantially cylindrical surface extended centering on the 2nd central axis C2. In other words, the first outer circumferential surface 71b is a substantially cylindrical surface extending around the second central axis C2. The second central axis C2 is an example of the second axis.

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 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, the first inner peripheral surface 71a, and the first hole 75 are eccentric with each other. Further, the second central axis C2 may be inclined with respect to the first central axis C1.

The first outer circumferential surface 71b is formed in a substantially cylindrical shape extending around the second central axis C2, thereby forming rotational symmetry around the second central axis C2. As described above, 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 (direction indicated by the arrow on the Z axis, the upward direction) and the negative direction along the Z axis. The first hole 75 is opened to the two first end surfaces 71c.

The fitting part 76 is provided in the cylinder part 71. The fitting portion 76 protrudes from the first inner peripheral surface 71a to the inside of the first hole 75. In the direction along the Z axis, the length of the fitting portion 76 is shorter than the length of the first hole 75. 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. In addition, the fitting part 76 is not limited to this example.

As in the present embodiment, projections such as concave portions and fitting portions 76 may be provided on a portion of the first inner peripheral surface 71a. In this case, the 1st central axis C1 passes through the center of the 1st hole 75 in the part which has a circular cross section in which a recess or protrusion is not formed. Moreover, a recess or a protrusion may be provided in the whole area of the 1st inner peripheral surface 71a in the direction along a Z axis. In this case, the first central axis C1 passes through the center of the arcuate 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 is the first having the center closest to the geometric center of gravity (drawing center) of the cross section of the first hole 75 It passes through the center of the arcuate portion in the cross section of the hole 75.

In the above description, the case where the cross section of the first hole 75 has a circular or circular arc portion has been described, but the cross section of the first hole 75 may not have a circular arc portion. In this case, the 1st central axis C1 passes through the axis of symmetry of the 1st hole 75 in the part which has a rotationally symmetrical cross section in which a recess or protrusion is not formed. Moreover, a recess or a protrusion may be provided in the whole area of the 1st inner peripheral surface 71a in the direction along a 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. When the shape of the first hole 75 does not correspond to any of the above-described cases, the first central axis C1 passes through the geometric center of gravity of the cross section of the first hole 75.

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

The flange portion 72 protrudes from the first outer peripheral surface 71b of the cylindrical portion 71. The flange portion 72 is formed in a substantially disc shape spread on the X-Y plane. Further, the flange portion 72 may be formed in a different shape.

The flange portion 72 protrudes 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 facing in the positive direction along the Z axis. The first surface 72a is continuous with one first end surface 71c of the cylindrical portion 71. The second surface 72b is located on the opposite side of the first surface 72a and is a substantially flat surface facing 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. Due to this, a second hole 81 extending in the direction along the Z axis and penetrating the second member 62 is formed in the second member 62. In addition, the second hole 81 is not limited to a hole passing through 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 around the second central axis C2. In other words, the second hole 81 is a hole extending around the second central axis C2.

4, the 2nd member 62 has the 2nd inner peripheral surface 62a, the 2nd outer peripheral surface 62b, and the 2nd 2nd end surfaces 62c. The second inner peripheral surface 62a is an example of the second inner surface. The second outer peripheral surface 62b is an example of the second outer surface. The second inner circumferential surface 62a is a substantially cylindrical surface that divides (regulates) 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. In addition, a part of the second inner peripheral surface 62a may form the second hole 81. According to another expression, the second inner circumferential surface 62a is a substantially cylindrical surface extending around the second central axis C2. The second inner circumferential surface 62a faces the inside of the second hole 81. The second hole 81 is provided inside the second inner peripheral surface 62a.

The second inner circumferential surface 62a is formed in a substantially cylindrical shape that extends around the second central axis C2, thereby forming rotational symmetry around the second central axis C2. In this way, the second central axis C2 is also a symmetric axis of the second inner peripheral surface 62a.

As described above, the center (second central axis C2) of the second hole 81 and the second inner peripheral surface 62a, and the center of the first outer peripheral surface 71b of the tube portion 71 of the first member 61 (the first 2 The central axis C2) is substantially coincident. Due to this, when the first member 61 and the second member 62 are not fixed to each other and free, the second member 62 can rotate about the second central axis C2 relative to the first member 61. have.

The cylinder 71 of the first member 61 is accommodated in the second hole 81. The radius of the second hole 81 and the radius of the first outer circumferential surface 71b of the cylindrical portion 71 of the first member 61 are substantially equal. For this reason, the 2nd inner peripheral surface 62a contacts the 1st outer peripheral surface 71b of the cylinder part 71 accommodated in the 2nd hole 81, and the 2nd member 62 is Z with respect to the 1st member 61 Limits movement in the direction intersecting the axis. In addition, a part of the second inner peripheral surface 62a may be slightly spaced 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. 5, the 2nd outer peripheral surface 62b is a cylindrical surface extended centering on the 3rd central axis C3. In other words, the second outer peripheral surface 62b is a cylindrical surface extending around the third central axis C3. The third central axis C3 is an example of the third axis.

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 different position 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, the second inner peripheral surface 62a, and the second hole 81 are eccentric with each other. The third central axis C3 may be inclined obliquely with respect to the first central axis C1, or may be inclined obliquely 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. For this reason, 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 circumferential surface 62b is formed in a cylindrical shape extending around the third central axis C3, thereby being formed symmetrically around the third central axis C3. In this way, the third central axis C3 is also a symmetric axis of the second outer peripheral surface 62b.

As shown in Fig. 4, the two second end faces 62c face the positive direction along the Z axis and the negative direction along the Z axis. The second hole 81 is opened to the two second end surfaces 62c. By accommodating the cylinder portion 71 in the second hole 81, the second end surface 62c facing 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 second member 62 from moving in the positive direction along the Z axis relative to the first member 61.

The third member 63 is formed in a substantially cylindrical shape extending in the direction along the Z axis. Due to this, a third hole 85 extending in the direction along the Z axis and penetrating the third member 63 is formed in the third member 63. In addition, the third hole 85 is not limited to a hole passing through the third member 63, and may be a bottomed hole.

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 a virtual 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 extending around 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 an example of the third inner surface. The third inner peripheral surface 63a is a substantially cylindrical surface that divides (regulates) the third hole 85 and extends around the third central axis C3. In other words, the third inner peripheral surface 63a forms a third hole 85. In addition, a part of the third inner peripheral surface 63a may form the third hole 85. According to another expression, the third inner circumferential surface 63a is a substantially cylindrical surface extending around the third central axis C3. The third inner peripheral surface 63a faces the inside of the third hole 85. The third hole 85 is provided inside the third inner peripheral surface 63a. The 3rd inner peripheral surface 63a, the 2nd inner peripheral surface 62a, and the 2nd hole 81 are eccentric to each other.

The third inner circumferential surface 63a is formed in a substantially cylindrical shape extending around the third central axis C3, thereby forming a rotational symmetry around the third central axis C3. As described above, the third central axis C3 is also a symmetric axis of the third inner peripheral surface 63a.

As described above, the center of the third hole 85 and the third inner peripheral surface 63a (third central axis C3) and the center of the second outer peripheral surface 62b of the second member 62 (third central axis C3) Substantially matches. Due to this, when the second member 62 and the third member 63 are not fixed to each other and are free, the third member 63 can rotate about the third central axis C3 relative to the second member 62. have.

The second member 62 is received 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. For this reason, the third inner circumferential surface 63a contacts the second outer circumferential surface 62b of the second member 62 accommodated in the third hole 85, and the third member 63 is attached to the second member 62. Is limited to move in the direction intersecting the Z axis. In addition, a part of the third inner peripheral surface 63a may be slightly spaced 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 circumferential surface 63b is a cylindrical surface extending around the third central axis C3. That is, the center (third central axis C3) of the third outer peripheral surface 63b and the center (third central axis C3) of the third inner peripheral surface 63a substantially coincide. In other words, the third inner peripheral surface 63a and the third outer peripheral surface 63b are arranged in a concentric shape.

The third outer peripheral surface 63b is a substantially cylindrical surface extending from the third central axis C3 to the central axis. The third outer peripheral surface 63b is formed in rotational symmetry around the third central axis C3. In this way, the third central axis C3 is also a symmetric axis of the third outer peripheral surface 63b.

As shown in Fig. 3, the third member 63 is formed integrally with the hub 51 of the turbo fan 34, for example, by insert molding. 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. In addition, the third member 63 and the turbo fan 34 are not limited to this example, and may be formed as one component, for example, from the same material.

As shown in Fig. 4, the two third end faces 63c face the positive direction along the Z axis and the negative direction along the Z axis. The third hole 85 is opened to the two third end surfaces 63c. The cylinder 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 face 63c facing the positive direction along the Z axis has a flange portion ( 72) to the second surface 72b. The flange portion 72 supports the third member 63 and restricts the third member 63 from moving in the positive direction along the Z axis relative to the first member 61.

In the state in which the cylinder portion 71 is accommodated in the second hole 81 and the second member 62 is accommodated in the third hole 85, the first end face 71c facing the negative direction along the Z axis, the first The two end surfaces 62c and the third end surfaces 63c form approximately the same plane. The cap 35 mounted on the shaft 33a supports the first end face 71c, the second end face 62c, and the third end face 63c facing the negative direction along the Z axis, and the second end face 63c. And the third members 62 and 63 are restricted from moving 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 toroidal sheet made of a material having elasticity, such as synthetic rubber. By providing the seat 78, even if the first end face 71c, the second end face 62c, and the third end face 63c facing the negative direction along the Z axis form a step, the cap 35 ) Can stably support the first to third end surfaces 71c, 62c, and 63c.

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 recesses 91 are provided on the first outer circumferential surface 71b of the first member 61. The first concave portion 91 may be referred to as a groove, a concave portion, and a notch, for example.

The first concave portion 91 is a groove that extends in the direction along the Z axis and has a substantially semicircular cross section. Moreover, the 1st recessed part 91 may be formed in another shape. The first concave portion 91 is opened to the first outer circumferential surface 71b and is opened to the first end surface 71c facing the negative direction along the Z axis of the cylindrical portion 71.

The plurality of first concave portions 91 are arranged at every first pitch P ₁ around the second central axis C2. In other words, the plurality of first recesses 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 angle difference between two adjacent first recesses 91 around the second central axis C2. In the first embodiment, the first pitch P ₁ is 25°.

Among the plurality of first concave portions 91, the angle difference between two adjacent first concave portions 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 recesses for each first pitch P ₁ around the second central axis C2 starting from one first recess 91 When the portion 91 is disposed, the angle difference between the first concave portion 91 serving as a starting point and the first concave portion 91 disposed last is different from the first pitch P ₁ .

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

The second concave portion 92 is a groove that extends in the direction along the Z axis and has a substantially semicircular cross section. Moreover, the 2nd recessed part 92 may be formed in another shape. The radius of the second concave portion 92 is approximately equal to the radius of the first concave portion 91. The second recess 92 is opened to the second inner circumferential surface 62a and opens to the two second end surfaces 62c of the second member 62.

The plurality of second concave portions 92 is disposed every second pitch P ₂ around the second central axis C2. The second pitch P ₂ is an example of the second angular distance and the third angle θ ₃ , and is an angle difference between two adjacent second recesses 92 around the second central axis C2. In the first embodiment, the second pitch P ₂ is 24°. In this way, the second pitch P ₂ is different from the first pitch P ₁ . Similar to the first concave portion 91, among the plurality of second concave portions 92, an angle difference between two adjacent second concave portions 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. Moreover, the 3rd recessed part 93 may be formed in another shape. The third recess 93 is opened to the second outer circumferential surface 62b and is opened to the two second end surfaces 62c of the second member 62.

The plurality of third concave portions 93 are disposed every 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 angle difference between two third recesses 93 adjacent to the third central axis C3. In the first embodiment, the third pitch P ₃ is 18°. Similar to the first concave portion 91, the angle difference between two adjacent third concave portions 93 among the plurality of third concave portions 93 may be different from the third pitch P ₃ .

A plurality of fourth recesses 94 are provided on the third inner circumferential surface 63a of the third member 63. The fourth recess 94 may also be referred to as a groove, recess, and notch, for example. The fourth recess 94 is a groove that extends in the direction along the Z axis and has a substantially semicircular cross section. Moreover, the 4th recessed part 94 may be formed in another shape. The radius of the fourth recess 94 is approximately equal to the radius of the third recess 93. The fourth recess 94 is opened to the third inner circumferential surface 63a and is opened to the two third end surfaces 63c of the third member 63.

The plurality of fourth concave portions 94 are disposed at every 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 angle difference between two fourth recesses 94 adjacent to the third central axis C3. In the first embodiment, the fourth pitch P ₄ is 19°. In this way, 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 concave portion 91, the angular difference between two adjacent fourth concave portions 94 among the plurality of fourth concave portions 94 may be different from the fourth pitch P ₄ .

As shown in FIG. 4, the 1st pin 64 and the 2nd pin 65 are formed in substantially cylindrical shape. Further, the first pin 64 and the second pin 65 may be formed in different shapes. The radius of the first pin 64 is approximately equal to the radius of the first concave portion 91 and also approximately equal to the radius of the second concave portion 92. The radius of the second pin 65 is approximately equal to the radius of the third concave portion 93, and also approximately equal to the radius of the fourth concave portion 94.

As shown in FIG. 5, the 1st pin 64 is accommodated in one of the some 1st recessed part 91 and the 2nd recessed part 92. The first pin 64 restricts the first member 61 and the second member 62 from rotating relative to the second central axis C2. For this reason, the 1st member 61 and the 2nd member 62 transmit torque to each other, and can rotate integrally around the 2nd central axis C2.

The second pin 65 is accommodated in one of the plurality of opposing third recesses 93 and one of the plurality of fourth recesses 94. The second pin 65 restricts the second member 62 and the third member 63 from rotating relative to the third central axis C3. For this reason, the 2nd member 62 and the 3rd member 63 transmit torque to each other, and can rotate integrally around the 3rd 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 turbo fan 34 formed integrally with the third member 63. Specifically, the first to third members 61 to 63 are rotated around each other (the second central axis C2 or the third central axis C3), and the position of the central axis of the shaft 33a of the motor 33 And, the position of the center of gravity of the turbo fan 34 is arranged. In other words, the position of the first central axis C1 and the position of the center of gravity of the turbo fan 34 coincide.

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

With the position of the first central axis C1 and the position of the center of gravity of the turbo fan 34 coinciding, one of the plurality of first recesses 91 facing each other and one of the plurality of second recesses 92 The first pin 64 is accommodated, and the second pin 65 is accommodated in one of the plurality of opposed third recesses 93 and the plurality of fourth recesses 94. Thereby, it becomes possible for the shaft 33a of the motor 33 to transmit rotation (torque) to the turbo fan 34 through the first to third members 61 to 63.

The center of gravity of the turbo fan 34 may be at any position on the first central axis C1 along the Z axis. That is, the position of the center of gravity of the turbo fan 34 is the same as the position of the first central axis C1 when viewed from the plane in the direction in which the first central axis C1 extends (positive direction along the Z axis or negative direction along the Z axis). Matches.

Since the position of the first central axis C1 and the position of the center of gravity of the turbo fan 34 coincide, the occurrence of vibration in the rotating turbo fan 34 is suppressed. Further, even if the position of the center of gravity of the turbo fan 34 differs from the position of the first central axis C1, the position of the first central axis C1 approaches the position of the center of gravity of the turbo fan 34, thereby rotating the turbo. Vibration generated in the fan 34 is 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 which is the center of the turbo fan 34 and the third member 63, the first to third members 61 To 63) are arranged as shown in FIG. 5. That is, the 1st central axis C1 and the 3rd central axis C3 are arrange|positioned at the same position. In this case, the position of the second central axis C2 may be different from the position shown in FIG. 5.

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 turbo fan 34 The position of (third central axis C3) substantially coincides. This suppresses the occurrence of vibration in the rotating turbo fan 34.

On the other hand, the position of the center of gravity of the turbo fan 34 may be different from the position of the third central axis C3 due to, for example, a position shift of the third member 63 during insert molding. In this case, the first to third members 61 to 63 are rotated around each other (the second central axis C2 or the third central axis C3) from the position in FIG. 5. Hereinafter, as shown in FIG. 5, the alignment of the center of gravity CG at the position different from the third central axis C3 and the first central axis C1 will be described. In addition, for convenience of description, the first central axis C1 and the third central axis C3 shown in FIG. 5 are based on the same state, but the alignment of the center of gravity CG and the first central axis C1 is not limited to this example. .

The center of gravity CG is at a position indicated by polar coordinates R _f and θ _f with respect to the third central axis C3. That is, while the center of gravity CG is spaced apart from the third central axis C3 by a distance R _f , it is at a position rotated by an angle θ _f around the third central axis C3 from the position shown in FIG. 5.

7 is a plan view showing a bush 36 in 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 over the angle θ _r1 around the second central axis C2. Accordingly, the distance between the first central axis C1 and the third central axis C3 changes, and the first central axis C1 is disposed at a position spaced apart from the third central axis C3 by a distance R _f . That is, by rotating the first member 61 around the second central axis C2 relative to the second member 62, the eccentricity amount of the first central axis C1 with respect to the third central axis C3 is adjusted.

8 is a plan view showing a bush 36 in which the second member 62 of the first embodiment is rotated. Subsequently, the second member 62 is rotated with respect to the third member 63 over the angle θ _r2 around the third central axis C3. Thereby, the angle of the first central axis C1 based on the third central axis C3 is changed, and the first central axis C1 is disposed in the polar coordinates R _f ,θ _f , and is disposed at the same position as the center of gravity CG. . That is, by rotating the second member 62 around the third central axis C3 relative to the third member 63, the eccentric angle of the first central axis C1 relative to the third central axis C3 is adjusted.

The rotation angle θ _r1 of the first member 61 for arranging the first central axis C1 in the polar coordinates (R _f ,θ _f ) is obtained by the following equation (Number 1). That is, the first member 61 is rotated around the second central axis C2 relative to the second member 62 based on the eccentric distance R _f of 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 in the polar coordinates (R _f ,θ _f ) is obtained by the following equation (2). That is, the second member 62 is rotated around the third central axis C3 relative to the third member 63 based on the eccentric angle θ _f of 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 axis 33a of the motor 33 and the position of the center of gravity CG of the turbo fan 34 substantially coincide. In this case, the turbo fan 34 and the shaft 33a of the motor 33 are apparently eccentric with each other, but vibration of the rotating turbo fan 34 is suppressed.

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 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. Is set. As the first member 61 is rotated 180 degrees relative to the second member 62, the first central axis C1 is disposed 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 (Formula 3).

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

As described above, the second member 62 is rotated around the second central axis C2 relative to the first member 61 according to the position of the center of gravity CG of the turbo fan 34. Then, the first pin 64 is accommodated in the first concave portion 91 and the second concave portion 92 facing each other, and limits the relative rotation of the first member 61 and the second member 62. In the first member 61 and the second member 62, the second member 62 is the first member 61 at a plurality of angles around the second central axis C2 with respect to the first member 61 It is possible to be mounted on.

Further, the third member 63 is rotated about the third central axis C3 relative to the second member 62 according to the position of the center of gravity CG of the turbo fan 34. Then, the second pin 65 is accommodated in the opposing third concave portion 93 and the fourth concave portion 94, and limits the relative rotation of the second member 62 and the third member 63. In the second member 62 and the third member 63, the third member 63 is the second member 62 at a plurality of angles around the third central axis C3 with respect to the second member 62 It is possible to be mounted on. This makes it possible to match the position of the central axis (first central axis C1) of the shaft 33a of the motor 33 with the position of the center of gravity CG of the turbo fan 34.

In the first embodiment, the angle of the second member 62 relative to the first member 61 is adjustable in 1° increments around the second central axis C2. In addition, the angle of the third member 63 relative to the second member 62 can be adjusted in units 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 units of 1°. Hereinafter, an example of setting of 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 and the difference ΔP ₃₄ of the fourth pitch P is _4, a is set such that the third pitch P ₃ and the fourth the pitch P ₄ of the at least one sub-multiple of. 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 the value obtained by subtracting the fourth pitch P ₄ from the third pitch P ₃ . In the first embodiment, the third pitch P ₃ is 18 ° and the pitch P ₄ of the fourth difference ΔP ₃₄ of 19 °, is 1 °. For this reason, the difference ΔP ₃₄ is a factor of the third pitch P _{3 and} a factor of the fourth pitch P ₄ . The difference ΔP ₃₄ divides the third pitch P ₃ into n _a equal parts.

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

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

In 1st Embodiment, the value obtained by Formula (Formula 4) is about -2.056, and is 0 or less. Because of this, the third pitch in the first embodiment and the fourth pitch P ₃ P ₄ is, satisfies the formula (number 4).

In addition, when the difference ΔP ₃₄ is different from a divisor of 360°, the third pitch P ₃ and the fourth pitch P ₄ are set to satisfy the following equation (Number 5).

The position around the third central axis C3 of the third member 63 relative to the second member 62 by the third pitch P ₃ and the fourth pitch P ₄ satisfying the expression (number 4) or the expression (number 5) The (angle) can be adjusted without any deficiency 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 units of 1°.

There may be a plurality of combinations of the third pitch P ₃ and the fourth pitch P ₄ that satisfy Expression (Number 4) or Expression (Number 5). Among the plurality of combinations, the closer the value obtained from Expression (Formula 4) or Expression (Formula 5) approaches 0, the smaller the number of the third recessed portions 93 and the fourth recessed portions 94 is.

In the combination of the third pitch P ₃ (18°) and the fourth pitch P ₄ (19°) in the first embodiment, when the difference ΔP ₃₄ is 1°, the third pitch P ₃ and the fourth pitch P ₄ Of the multiple combinations of, the value of expression (number 4) is the combination closest to zero. For this reason, the combination of the third pitch P ₃ and the fourth pitch P ₄ in the first embodiment is a combination in which the number of the third recesses 93 and the fourth recesses 94 is the smallest.

Similarly, if the difference ΔP ₃₄ differs from the 360 ° divisor, the combination of the third pitch P ₃ and the fourth the pitch P ₄ is the liquid of the third plurality of combinations of pitch P ₃ and the fourth pitch P _4, the formula (5 Number ) Is set to the nearest zero combination. In this case, the combination of the third pitch P ₃ and the fourth pitch P ₄ is a 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.

The difference ΔP ₁₂ between the first pitch P ₁ and the second pitch P ₂ is set to be a factor of at least one of the first pitch P1 and the 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 an 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 25° as the first pitch P ₁ and 24° as the second pitch P ₂ is 1°. For this reason, the difference ΔP ₁₂ is a factor of the first pitch P _{1 and} a factor of the second pitch P ₂ . The difference ΔP ₁₂ divides the second pitch P ₂ into n _c equal parts.

Further, at least one of the first pitch P ₁ and the second pitch P ₂ is set to be a factor of 360°. In the present embodiment, 24°, which is the second pitch P ₂ , is a divisor of 360°. In addition, the second pitch P ₂ equally divides 360° into 1/2 n _d . In addition, 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 first concave portions 91 is N. In this case, the first pitch P ₁ and the second pitch P ₂ are set to satisfy the following expressions (expression 6) and expressions (expression 7).

As described above, the first member 61 is rotated over the angle θ _r1 around the second central axis C2 relative to the second member 62, so that the eccentric distance of the first central axis C1 to the third central axis C3 It can be made equal to the eccentric distance R _f of the center of gravity CG. As shown in equation (1), the eccentric distance R _f is a cosine function of the angle θ _r1 . The function of the cosine is 180° symmetrical. For this reason, it is assumed that the second pitch P ₂ divides 360° into 1/2 n _d equal parts, and the first pitch P ₁ and the second pitch P ₂ are set as Equation (Number 6) to form a plurality of first recesses. The overlap of angles obtained by the combination of 91 and the plurality of second recesses 92 is suppressed. That is, the number of the plurality of first concave portions 91 and the plurality of second concave portions 92 can be reduced.

In 1st Embodiment, the value obtained by Formula (Number 6) becomes about -6.042, and is 0 or less. Thus, the first pitch P ₁ in the first embodiment and the second pitch P ₂ is, satisfies the formula (number 6). In addition, in the first embodiment, the first pitch P ₁ and the second pitch P ₂ also satisfy equation (7).

In addition, when 360°/ΔP ₁₂ is odd, the first pitch P ₁ and the second pitch P ₂ are set to satisfy the following equation (8), and only one first concave portion 91 is the first outer peripheral surface. It may be provided in (71b). For example, when ΔP ₁₂ is 8°, 24°, 40°, 72°, or 120°, 360°/ΔP ₁₂ is odd.

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 to satisfy the following equation (Number 9).

First by a pitch P ₁ and a second pitch P ₂ satisfies the formula (number 6) and (number 7) or expression (number 8), or expression (number 9), and satisfies, the first member 61 The position (angle) around the second central axis C2 of the second member 62 with respect to the difference ΔP ₁₂ as a unit can be adjusted over the entire circumference around the second central axis C2 without lack.

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

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 Of the plurality of combinations, the value of the expression (number 6) is the closest combination. Therefore, the first embodiment of the first pitch P ₁ and a second combination of the pitch P ₂ is in a first combination where the number of write of the recess 91 and the second recess (92).

When 360°/ΔP ₁₂ is odd, the combination of the first pitch P ₁ and the second pitch P ₂ satisfying the equation (Number 8) is the number of the first recess 91 and the second recess 92 It may be the least combination. In this case, for example, formula (number 6) and (number 7) to satisfy a first pitch P ₁ and a first and second pitch P _2, a first pitch that satisfies the formula (number 8), P ₁ and a second pitch that Among P ₂ , the one with a smaller number of the plurality of first recesses 91 and the plurality of second recesses 92 is selected. For example, when ΔP ₁₂ is 72°, the combination of the first pitch P ₁ and the second pitch P ₂ satisfying the expression (Equation 8) includes a plurality of first recesses 91 and a plurality of second recesses It is the combination with the smallest number of parts 92.

On the other hand, if the difference ΔP ₁₂ differs from the 360 ° divisors, the first pitch P ₁ and a second combination of the pitch P ₂ is the liquid of the first pitch P ₁ and a second plurality of combinations of the pitch P _2, formula (number 9 ) Is set to the nearest zero combination. In this case, the combination of the first pitch P ₁ and the second pitch P ₂ is a combination in which the number of the first recesses 91 and the second recesses 92 is the smallest.

In the air conditioner 10 having 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 first outer peripheral surface 71b Is eccentric from the second central axis C2. In addition, 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 accommodated in the second hole 81 of the second member 62, and the second member 62 is received in the third hole 85 of the third member 63. The second member 62 is disposed at a desired angle around the second central axis C2 with respect to the first member 61, and by the first pin 64 around the second central axis C2 with the first member 61. Limit the rotation. The third member 63 is disposed at a desired angle around the third central axis C3 with respect to the second member 62, and around the third central axis C3 with the second member 62 by the second pin 65 Limit the rotation. Thereby, the position of the 3rd central axis C3 can be arrange|positioned at the position coinciding with the 1st central axis C1, or the desired position different from the 1st central axis C1. Thus, for example, the position of the first central axis C1 can be matched with the center of gravity CG of the bush 36, and the vibration of the turbo fan 34 on which the bush 36 is mounted is suppressed. Therefore, generation of noise due to vibration is suppressed.

In addition, the first pin 64 has one of a plurality of first concave portions 91 arranged every first pitch P ₁ around the second central axis C2 and a first pitch P ₁ around the second central axis C2. It is accommodated in one of the plurality of second recesses 92 disposed every second pitch P ₂ different from and limits the relative rotation of the first member 61 and the second member 62. As a result, the second to the position (angle) of the surrounding second center axis C2 of the first member 61 of the member 62, a first pitch P ₁ and a second difference ΔP ₁₂ of pitch P ₂ in the unit , Can be adjusted finer.

The second pin 65 is different from one of the plurality of third recesses 93 arranged every third pitch P ₃ around the third central axis C3, and the third pitch P ₃ around the third central axis C3. It is accommodated in one of the plurality of fourth recesses 94 arranged every fourth pitch P ₄ and limits the relative rotation of the second member 62 and the third member 63. Thereby, the position (angle) around the third central axis C3 of the third member 63 relative to the second member 62 is based on the difference ΔP ₃₄ between the third pitch P ₃ and the fourth pitch P ₄ as a unit. , Can be adjusted finer.

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. Thereby, the 3rd central axis C3 can be arrange|positioned at the position coinciding with the 1st central axis C1.

The pitch P ₃ and the third difference ΔP ₃₄ of the fourth pitch P _4, a third the pitch P ₃ and the fourth the pitch P ₄ of at least one of the divisor. 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 around the third central axis C3 relative to the second member 62 is adjusted over the entire circumference around the third central axis C3 in units of the difference ΔP ₃₄ . Can be.

At least one of the third pitch P ₃ and the fourth pitch P ₄ is a factor of 360°. As a result, the to the position (angle) of the Tri center axis C3 of the second member 62 of the third member 63, the difference ΔP ₃₄ as a unit, the third central axis over the entire periphery of the surrounding C3 When the plurality of third recesses 93 and the plurality of fourth recesses 94 are arranged to be adjustable, the number of the third recesses 93 and the fourth recesses 94 can be reduced. have. Therefore, it becomes easy to form the 3rd recessed part 93 and the 4th recessed part 94, and the assembly of the bush 36 becomes easy.

The third pitch P ₃ is equally divided into 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 is equally divided into 360° n _b . In addition, when the difference ΔP ₃₄ is a factor of 360°, the combination of the third pitch P ₃ and the fourth pitch P ₄ satisfies Expression (Number 4), and the third when the difference ΔP ₃₄ is different from the factor of 360° The combination of the pitch P ₃ and the fourth pitch P ₄ satisfies Expression (Number 5). Then, the third pitch P ₃ and the fourth is a combination of the pitch P _4, and the third pitch P ₃ and the fourth the pitch P, at least one of the value of the expression (number 4) or expression (number 5) of the combination of the 0 ₄ It is a close combination. As a result, the to the position (angle) of the Tri center axis C3 of the second member 62 of the third member 63, the difference ΔP ₃₄ as a unit, the third central axis over the entire periphery of the surrounding C3 While being able to adjust without deficiency, the number of the third recesses 93 and the fourth recesses 94 can be reduced. Therefore, it becomes easy to form the 3rd recessed part 93 and the 4th recessed part 94, and the assembly of the bush 36 becomes easy.

A first pitch P ₁ and the second pitch difference ΔP ₁₂ of P _2, a first pitch P ₁ and at least one of a sub-multiple of the 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 with the difference ΔP ₁₂ as a unit. Can be.

At least one of the first pitch P ₁ and the second pitch P ₂ is a factor of 360°. Thereby, the some 1st recessed part 91 so that the position (angle) of the 2nd member 62 around the 2nd central axis C2 with respect to the 1st member 61 can be adjusted in units of the difference ΔP ₁₂ And when the plurality of second recesses 92 are arranged, the number of the first recesses 91 and the second recesses 92 can be reduced. Therefore, it becomes easy to form the 1st recessed part 91 and the 2nd recessed part 92, and the assembly of the bush 36 becomes easy.

A second pitch P _2, n _c being equally divided in the art by a second pitch P ₂ of the first difference ΔP ₁₂ of pitch P _1, a second pitch P ₂ is uniformly distributed to the 360 ° 1/2 n _d. In addition, the the difference ΔP ₁₂ sub-multiple of 360 °, the second central axis of the number of the first plurality of the first concave portion 91 is disposed for each pitch P ₁ around C2 N first pitch P ₁ and the second to person if the combination of the pitch P ₂ is the formula (number 6) and (number 7) to satisfy the difference ΔP ₁₂ is in the 360 ° divisor is different if the first pitch P ₁ and a second combination of the pitch P ₂ expression (number of 9) is satisfied. And, the value of the first pitch P ₁ and a second expression of the at least one combination of the pitch P is a combination of the _two, a first pitch P ₁ and a second pitch P ₂ (number 6) or expression (number 9) The 0 It is a close combination. Thereby, the position (angle) of the 2nd member 62 around the 2nd central axis C2 with respect to the 1st member 61 is adjustable in units of the difference ΔP ₁₂ , and the first concave portion 91 And the number of second recesses 92 can be reduced. Therefore, it becomes easy to form the 1st recessed part 91 and the 2nd recessed part 92, and the assembly of the bush 36 becomes easy.

A second pitch P ₂ of the first pitch P difference ΔP ₁₂ is sub-multiple of the second pitch P ₂ of the _first and second pitch P ₂ is a sub-multiple of 360 °, it is a sub-multiple of the difference ΔP ₁₂ 360 °. Then, when the value obtained by dividing 360° by the difference ΔP ₁₂ is an odd number, the number of the first recesses 91 is satisfied while satisfying the expression (Number 8). Thereby, the position (angle) of the 2nd member 62 around the 2nd central axis C2 with respect to the 1st member 61 is adjustable in units of the difference ΔP ₁₂ , and the first concave portion 91 And the number of second recesses 92 can be reduced. Therefore, it becomes easy to form the 1st recessed part 91 and the 2nd recessed part 92, and the assembly of the bush 36 becomes easy.

(Second embodiment)

The second embodiment will be described below with reference to FIG. 10. In addition, in description of the following several embodiment, the component which has the same function as the component already demonstrated is given the same code|symbol as the component already demonstrated and the description may be abbreviate|omitted. In addition, a plurality of constituent elements to which the same reference numerals are assigned may not be said to have all functions and properties in common, and may have different functions and properties according to each embodiment.

10 is a plan view showing a part of the bush 36 according to the second embodiment. 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°, and the fourth pitch P ₄ Is 16°.

The first pitch P ₁ and the second pitch P ₂ of the second embodiment satisfies equations (expression 6) and equations (expression 7). However, in the second embodiment, the number of the first concave portion 91 and the second concave portion 92 is greater than in the first embodiment.

The second embodiment of the third pitch P ₃ and P ₄ is a fourth pitch, it satisfies the formula (number 4). However, in the second embodiment, the number of the third concave portions 93 and the fourth concave portions 94 is greater than 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 expressions (expression 6) and expression (expression 7) is expressed by expressions (expression 6) and expressions (expression 7). The value obtained from may be different from the combination closest to 0. In addition, the combination of the third and fourth pitch P ₃ P ₄ pitch that satisfies the formula (number 4) is a value obtained from the equation (number 4), or different combinations closest to 0 and.

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 some 1st pin 64 can be accommodated in the 1st recessed part 91 and the 2nd recessed part 92, and the relative rotation of the 1st member 61 and the 2nd member 62 is possible. You can limit it more reliably. Moreover, the some 3rd recessed part 93 and the some 4th recessed part 94 oppose. Thereby, a plurality of second pins 65 can be accommodated in the third recess 93 and the fourth recess 94, so that the relative rotation of the second member 62 and the third member 63 is possible. You can limit it more reliably.

(Third embodiment)

The third embodiment will be described below with reference to FIG. 11. 11 is a plan view showing a part of the bush 36 according to the third embodiment. 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°, and 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 Expression (Number 4). For this reason, the angle of the 3rd member 63 with respect to the 2nd adjustable member 62 is provided by 360 degrees in 2 degree units.

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 expressions (expression 6) and expressions (expression 7). For this reason, the angle of the 2nd member 62 with respect to the 1st adjustable member 61 is provided by 360 degrees in 2 degree units.

In the air conditioner 10 having 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 ₃ The difference ΔP ₃₄ between 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 units of 2°.

(Fourth embodiment)

The fourth embodiment will be described below with reference to FIG. 12. 12 is a plan view showing a part of the bush 36 according to the fourth embodiment. 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°, and 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 Expression (Number 4). For this reason, the angle of the 3rd member 63 with respect to the 2nd adjustable member 62 is provided by 360 degrees in 3 degree units.

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 expressions (expression 6) and expressions (expression 7). For this reason, the angle of the 2nd member 62 with respect to the 1st adjustable member 61 is provided by 360 degrees in 3 degree units.

In the air conditioner 10 having 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 ₃ The difference ΔP ₃₄ between 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 units of 3°.

According to at least one embodiment described above, the first limiting member is different from the first angular distance around the second central axis and one of the plurality of first concave portions disposed at the first angular distance around the second central axis. It is accommodated in one of a plurality of second recesses arranged at every second angular distance, and limits the relative rotation of the first member and the second member. Thereby, the position (angle) of the 2nd member around the 2nd central axis with respect to the 1st member can be adjusted more finely as a unit of the difference between a 1st angular distance and a 2nd angular distance.

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

10: air conditioner
33: motor
33a: axis
34: turbo fan
36: Bush
61: first member
62: second member
62a: Second inner peripheral surface
62b: Second outer peripheral surface
63: third member
63a: Third inner circumference
64: first pin
65: second pin
71: Pass
71a: First inner circumference
71b: first outer peripheral surface
75: first hole
81: second hole
85: third hole
91: first recess
92: second recess
93: third recess
94: fourth recess
C1: first central axis
C2: 2nd central axis
C3: 3rd central axis
CG: center of gravity
P ₁ : 1st pitch
P ₂ : 2nd pitch
P ₃ : Third pitch
P ₄ : 4th pitch
ΔP ₁₂ , ΔP ₃₄ : difference

Claims (12)

It has a first inner surface extending about a first axis, and a first outer surface extending around a second axis different from the first axis while being located on the opposite side of the first inner surface, and at least of the first inner surface. A first member, wherein a first hole is formed, and at least one first concave portion is disposed on the first outer surface at a first angular distance around the second axis,
It has a second inner surface extending about the second axis, and a second outer surface extending around a third axis different from the second axis while being located on the opposite side of the second inner surface, At least a portion is configured to contact the first outer surface of the first member accommodated in the second hole while forming a second hole configured to receive the first member, and on the second inner surface, the second At least one second recessed portion disposed at every second angular distance different from the first angular distance around the axis, and at least one third recessed portion disposed at each third angular distance around the third axis on the second outer surface A second member provided,
The second member accommodated in the third hole, having a third inner surface extending about the third axis, and at least a portion of the third inner surface forming a third hole configured to receive the second member A third member which is in contact with the second outer surface of, and is provided with at least one fourth recessed portion disposed at every fourth angular distance different from the third angular distance around the third axis, on the third inner surface,
A first limiting member accommodated in one of the opposing first recesses and one of the second recesses and restricting the first member and the second member from rotating about the second axis;
A second limiting member accommodated in one of the opposing third recesses and one of the fourth recesses and restricting the second member and the third member from rotating about the third axis
It is provided, the installation structure. According to claim 1,
The first axis, the second axis and the third axis are parallel to each other,
The installation structure in which the distance between the first axis and the second axis is equal to the distance between the second axis and the third axis. According to claim 2,
The installation structure in which 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. According to claim 3,
At least one of the third angular distance and the fourth angular distance is a divisor of 360°, an installation structure. The method of claim 4,
The first angle θ ₁ which is one of the third angular distance and the fourth angular distance is the difference Δθ ₁₂ between the first angle θ ₁ and the second angle θ _{2 which} is the other of the third angular distance and the fourth angular distance, n Divided into ₁ ,
The first angle θ ₁ divides 360° into n ₂ equal parts,
When the difference Δθ ₁₂ is a factor of 360°, the combination of the first angle θ ₁ and the second angle θ ₂ satisfies the following equation (1), and also the first angle θ ₁ and the second Of the at least one combination of angles θ ₂ , the value of the formula (1) is the closest combination 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 Expression (2) below, and further includes the first angle θ ₁ and the first Of the at least one combination of 2 angles θ ₂ , the value of the formula (2) is the closest combination,

Installation structure. The method according to any one of claims 2 to 5,
The installation structure in which the second difference between the first angular distance and the second angular distance is at least one of the first angular distance and the second angular distance. The method of claim 6,
At least one of the first angular distance and the second angular distance is a divisor of 360°, an installation structure. The method of claim 7,
The third angle θ ₃ which is one of the first angular distance and the second angular distance is n by a difference Δθ ₃₄ between the third angle θ ₃ and the other of the first angular distance and the second angular distance, the fourth angle θ ₄ Divided into _three equal parts,
The third angle θ ₃ equally divides 360° into 1/2 n ₄ ,
And the difference Δθ ₃₄ is sub-multiple of 360 °, also the second to the axis number of the first recess or the second recess is arranged in each of the fourth angle θ ₄ If N individual, the third angle θ ₃ And the combination of the fourth angle θ ₄ satisfies the following equations (3) and (4), and also among the combination of at least one of the third angle θ ₃ and the fourth angle θ ₄ , the equation (3) The value of is the closest combination 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 equation (5), and also the third angle θ ₃ and the third 4 Of the at least one combination of angles θ ₄ , the value of the formula (5) is a combination combination closest to 0,

Installation structure. The method of claim 7,
The difference Δθ ₃₄ between the third angle θ ₃ which is one of the first angular distance and the second angular distance and the fourth angle θ _{4 which} is the other of the first angular distance and the second angular distance is a factor of the third angle θ ₃ ,
The third angle θ ₃ is a factor of 360°,
The difference Δθ ₃₄ is a factor of 360°,
When the value obtained by dividing 360° by the difference Δθ ₃₄ is an odd number, the following equation (6) is satisfied, and the number of the first concave portion or the second concave portion disposed every fourth angle θ ₄ is one,

Installation structure. The installation structure according to claim 1,
A power source having an axis inserted through the first hole and capable of rotating the axis
Equipped with a rotating machine. The installation structure according to claim 1,
A power source having an axis inserted through the first hole and capable of rotating the axis;
Fan connected to the third member
It is provided, the air conditioning apparatus. A first inner surface extending about a first axis and a first outer surface extending on a second axis that is located on the opposite side of the first inner surface and is different from the first axis and parallel to the first axis. A first member having at least a portion of the first inner surface forming a first hole, and at least one first concave portion disposed at each first angular distance around the second axis on the first outer surface Wow,
A second inner surface extending about the second axis, and a second inner surface located on the opposite side of the second inner surface and extending around a third axis different from the second axis and parallel to the second axis Having an outer surface, and at least a portion of the second inner surface is configured to contact the first outer surface of the first member accommodated in the second hole while forming a second hole configured to receive the first member, On the second inner surface, at least one second concave portion disposed at every second angular distance different from the first angular distance around the second axis is provided, and on the second outer surface, at every third angular distance around the third axis A second member provided with at least one disposed third recess,
The second member accommodated in the third hole, having a third inner surface extending about the third axis, and at least a portion of the third inner surface forming a third hole configured to receive the second member A third member that is in contact with the second outer surface of, and is provided with at least one fourth recessed portion disposed at every fourth angular distance different from the third angular distance around the third axis, on the third inner surface
And a first distance between the first axis and the second axis is equal to a second distance r between the second axis and the third axis.
From the state in which the first axis and the third axis coincide, the eccentric distance R _f between the center of gravity of the installation structure and the third axis, represented by polar coordinates (R _f ,θ _f ), based on the third axis On the basis of this, the first member is rotated with respect to the second member over an angle θ _r1 satisfying the following equation (7) around the second axis,

Rotating the second member about the third member around the third axis based on the eccentric angle θ _f between the third axis and the center of gravity over an angle θ _r2 satisfying the following equation (8),

Receiving a first restricting member in one of the opposing first recesses and one of the second recesses, limiting the first member and the second member from relatively rotating about the second axis,
Receiving a second limiting member in one of the opposing third recesses and one of the fourth recesses, and restricting the second member and the third member from relatively rotating around the third axis
The adjustment method, which includes.

Images