Rotary body mounting device and air treatment device equipped with rotary body mounting device

Abstract

To provide a rotating body installing device that can stably rotate a rotating body, is easy to install the rotating body, and has excellent durability.SOLUTION: A rotating body installed on a motor 1 comprises a boss mounting fitting 6, a boss 7, and a detaching device 8. The boss mounting fitting 6 has a motor shaft insertion hole 60 and a boss mounting surface 61. The boss 7 is an elastic body, has a boss side motor shaft insertion hole 70 and a groove 71 into which a motor pin 3 is fitted, and is mounted to the boss mounting fitting 6 so as to form a gap 10 between an inner peripheral side lower surface of the boss 7 and the boss mounting surface 61. A rotating body installing device fixes the rotating body by the detaching device 8 with the motor pin 3 fitted into the groove 7.SELECTED DRAWING: Figure 21

Description

Technical Field

[0001] The present invention relates to a rotating body mounting device for mounting a rotating body such as a fan to a motor, and an air treatment device such as a range hood provided with the rotating body mounting device.

Background Art

[0002] Conventionally, a rotating body mounting device for mounting a rotating body such as a fan to a motor has been proposed. For example, the rotating body mounting device disclosed in Patent Document 1 has been proposed. This rotating body mounting device is configured to provide an abutment plate made of rubber or soft plastic on the boss portion of the blade, provide a pin on the drive shaft of the motor, insert the boss portion into the drive shaft, and fix the blade by causing the abutment plate to bite into the pin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Since this rotating body mounting device fixes the blade by causing the abutment plate to bite into the pin, it is necessary to press the blade with a large force to surely cause the abutment plate to bite into the pin, so there is a problem that it is difficult to mount the blade. If the abutment plate is made of a soft material, it can be surely pressed with a small force to cause the abutment plate to bite into the pin, but when the blade starts to rotate or stops, the pin may move relative to the abutment plate and the rotation of the blade may become unstable. Therefore, since the abutment plate is made of a hard material, it is necessary to press it with a strong force to surely cause the abutment plate to bite into the pin.

[0005] To resolve this issue, the applicants developed a mounting device in which the blade boss is made of an elastic material, a motor shaft insertion hole and groove are formed in the boss, a motor pin is provided on the motor shaft, and the blade is attached to the motor shaft by inserting the motor shaft into the motor shaft insertion hole and fitting the motor pin into the groove. This mounting device makes it easy to attach the blades because all you have to do is fit the motor pins into the grooves, but the following problems arose. In this mounting device, when the blades rotate due to the rotation of the motor shaft, the boss vibrates slightly in the axial direction of the motor shaft, and the motor pin is strongly pressed against the bottom of the groove. Strong force acts on the bottom of the groove and the motor pin, and if the boss is made of a hard elastic material, the boss may crack or the motor pin may bend after prolonged use, resulting in durability problems.

[0006] Therefore, when the boss was made of a soft, elastic material to prevent the boss from cracking and the motor pin from bending, the motor pin sometimes moved relative to the boss when the blades started or stopped rotating, causing the blade rotation to become unstable.

[0007] The present invention was made to solve the above-mentioned problems, and its objective is to provide a rotating body mounting device and an air treatment device equipped with a rotating body mounting device that are easy to mount, allow the rotating body to rotate stably, and have excellent durability. [Means for solving the problem]

[0008] The first rotating body mounting device of the present invention is a rotating body mounting device for mounting a rotating body to a motor, wherein the motor shaft of the motor is provided with a motor pin, and the rotating body is provided with a boss mounting bracket and a boss Detachable deviceThe boss mounting bracket has a boss mounting surface around a motor shaft insertion hole into which the motor shaft is inserted, the boss is an elastic body and has a boss-side motor shaft insertion hole continuous with the motor shaft insertion hole and a groove into which the motor pin fits, and is attached to the boss mounting bracket such that a gap is formed between the inner circumferential lower surface of the boss and the boss mounting surface, the rotating body has the motor shaft inserted into the boss-side motor shaft insertion hole and the motor pin , spanning a position in the axial direction of the motor shaft that overlaps with the air gap and a position in the axial direction of the motor shaft that does not overlap with the air gap. With the groove in place, Detachable device This rotating body mounting device is characterized by fixing the motor shaft so that it does not move in the axial direction.

[0009] In the first rotating body mounting device of the present invention, the outermost end of the motor pin can be located outside the gap. According to this configuration, Motor pin This stabilizes the rotating body in the axial direction, preventing it from oscillating perpendicular to the axial direction of the motor shaft during rotation, and allowing the rotating body to rotate stably.

[0010] The second rotating body mounting device of the present invention is a rotating body mounting device for mounting a rotating body to a motor, wherein the motor shaft of the motor is provided with a motor pin, and the rotating body is provided with a boss mounting bracket and a boss Detachable device The boss mounting bracket has a boss mounting surface around the motor shaft insertion hole into which the motor shaft is inserted, and the boss is It is an elastic body, The motor shaft insertion hole has a boss-side motor shaft insertion hole that is continuous with the motor shaft insertion hole, and has a groove into which the motor pin fits, and is attached to the boss mounting bracket so as to form a gap between the inner circumferential lower surface of the boss and the boss mounting surface, and the rotating body has the motor shaft inserted into the boss-side motor shaft insertion hole and the motor shaft, and the motor pin, Spanning a position in the axial direction of the motor shaft that overlaps with the air gap and a position in the axial direction of the motor shaft that does not overlap with the air gap With the groove engaged, Detachable device This rotating body mounting device is characterized by fixing the motor shaft so that it does not move in the axial direction.

[0011] In the second rotating body mounting device of the present invention, the outermost end of the motor pin is located outside the gap, the central portion of the motor pin bites into the inner portion of the groove that is facing the lower surface of the inner circumference, and the tip portion of the motor pin bites into the outer portion of the groove that is outside the inner portion. According to this configuration, Motor pin This stabilizes the rotating body in the axial direction, preventing it from oscillating perpendicular to the axial direction of the motor shaft during rotation, and allowing the rotating body to rotate stably.

[0012] In the first and second rotating body mounting devices of the present invention, the gap extends to the motor shaft insertion hole on the boss side, and the boss is supported by its inner circumference portion only by its outer circumference portion. The aforementioned It can be a rotating body mounting device attached to a boss mounting bracket. With this configuration, the inner circumference of the boss is prone to distortion, and when the motor pin bites into the bottom of the groove, the inner circumference distorts, which can reduce the pressing force on the rotating body.

[0013] In the first and second rotating body mounting devices of the present invention, the lower surface of the boss has a stepped shape in which the inner circumferential lower surface is located above the outer circumferential lower surface, the thickness of the inner circumferential portion of the boss is thinner than the thickness of the outer circumferential portion, the boss is attached to the boss mounting bracket with at least the outer circumferential lower surface of the boss in contact with the boss mounting surface, and the gap is formed between the inner circumferential lower surface of the boss and the boss mounting surface. With this configuration, the thickness of the inner circumference portion of the boss is thinner than the thickness of the outer circumference portion, so the inner circumference portion of the boss is more prone to deformation, and the pressing force required to engage the motor pin with the bottom of the groove can be reduced.

[0014] In the first and second rotating body mounting devices of the present invention, the boss mounting bracket has a portion that is continuous with the opening end of the motor shaft insertion hole and the boss mounting surface that is curved or inclined in a funnel shape, The motor shaft of The motor shaft insertion hole It can be used as a rotating mounting device that constitutes an insertion guide section when inserting into a device. According to this configuration, even when the motor shaft is inserted obliquely into the boss-side motor shaft insertion hole, the tip of the motor shaft is guided along the insertion guide portion into the motor shaft insertion hole, so that the motor shaft can be smoothly inserted into the motor shaft insertion hole.

[0015] In the first and second rotating body mounting devices of the present invention, the boss can be a rotating body mounting device made of a thermoplastic elastomer having a hardness in the range of 60 to 90 degrees. According to this configuration, the boss can be easily molded and can be accurately molded into a predetermined shape.

[0016] In the first and second rotating body mounting devices of the present invention, a cylindrical member having a higher hardness than the boss is provided in the boss-side motor shaft insertion hole, and the rotating body mounting device in which the motor shaft is inserted into the cylindrical member can be used. According to this configuration, the rotating body can rotate stably.

[0017] The air treatment device provided with the rotating body mounting device of the present invention is an air treatment device provided with the rotating body mounting device, characterized in that it is provided with the rotating body mounting device according to any one of claims 1 to 4.

[0018] The rotating body mounting device of the present invention can have the following configuration. A rotating body mounting device for mounting a rotating body on a motor, wherein the motor shaft of the motor has a motor pin, and the rotating body includes a boss mounting fitting and a boss Detachable device The boss mounting fitting has a boss mounting surface around a motor shaft insertion hole into which the motor shaft is inserted; the boss is an elastic body; it has a boss-side motor shaft insertion hole continuous with the motor shaft insertion hole and a groove into which the motor pin fits; and it is attached to the boss mounting fitting so as to form a gap between the lower surface on the inner peripheral side of the boss and the boss mounting surface. The rotating body has the motor shaft inserted into the boss-side motor shaft insertion hole and the motor shaft insertion hole, and the motor pin , spanning a position in the axial direction of the motor shaft that overlaps with the air gap and a position in the axial direction of the motor shaft that does not overlap with the air gap. is fixed in a state of fitting into the groove so as not to move in the axial direction of the motor shaft by Detachable device A rotating body mounting device characterized by this.

[0019] (2) The outermost end of the motor pin is located outside the gap. ( 1 ) The rotating body mounting device described. (3) A rotating body mounting device for mounting a rotating body to a motor, wherein the motor shaft of the motor is provided with a motor pin, and the rotating body is provided with a boss mounting bracket and a boss Detachable device The boss mounting bracket has a boss mounting surface around the motor shaft insertion hole into which the motor shaft is inserted, and the boss is It is an elastic body, The motor shaft insertion hole has a boss-side motor shaft insertion hole that is continuous with the motor shaft insertion hole, and has a groove into which the motor pin fits, and is attached to the boss mounting bracket so as to form a gap between the inner circumferential lower surface of the boss and the boss mounting surface, and the rotating body has the motor shaft inserted into the boss-side motor shaft insertion hole and the motor shaft, and the motor pin, Spanning a position in the axial direction of the motor shaft that overlaps with the air gap and a position in the axial direction of the motor shaft that does not overlap with the air gap With the groove engaged, Detachable device The axis of the motor shaft A rotating body mounting device characterized by being fixed in a way that prevents movement in a particular direction.

[0020] (4) The rotating body mounting device according to (3), characterized in that the outermost end of the motor pin is located outside the gap, the central portion of the motor pin bites into the inner portion of the groove that is opposite to the lower inner surface, and the tip portion of the motor pin bites into the outer portion of the groove that is outside the inner portion. (5) The gap extends to the motor shaft insertion hole on the boss side, and the boss is supported by its inner circumference portion only by its outer circumference portion. The aforementioned (1) characterized by being attached to the boss mounting bracket ( 4 ) A rotating body mounting device as described in any of the following.

[0021] (6) The rotating body mounting device according to any one of (1) to (5), characterized in that the lower surface of the boss has a stepped shape in which the inner circumferential lower surface is located above the outer circumferential lower surface, the thickness of the inner circumferential portion of the boss is thinner than the thickness of the outer circumferential portion, the boss is attached to the boss mounting bracket with at least the outer circumferential lower surface of the boss in contact with the boss mounting surface, and the gap is formed between the inner circumferential lower surface of the boss and the boss mounting surface. (7) The boss mounting bracket has a portion that is continuous with the opening end of the motor shaft insertion hole and the boss mounting surface that is curved or inclined in a funnel shape, The motor shaft of The motor shaft insertion hole A rotating body mounting device according to any one of (1) to (6), characterized in that it constitutes an insertion guide portion for insertion into.

[0022] (8) The rotating body mounting device according to any one of (1) to (7), characterized in that the boss is made of a thermoplastic elastomer having a hardness in the range of 60 to 90 degrees. (9) The rotating body mounting device according to any one of (1) to (8), characterized in that the motor shaft insertion hole on the boss side is provided with a cylindrical member having a harder hardness than the boss, and the motor shaft is inserted into the cylindrical member. [Effects of the Invention]

[0023] According to the first rotating body mounting device of the present invention, the rotating body can be easily mounted, the rotating body can be rotated stably, and it has excellent durability. According to the second rotating body mounting device of the present invention, the rotating body is easier to mount, the rotating body can be rotated more stably, and it has excellent durability. [Brief explanation of the drawing]

[0024] [Figure 1] This is a front view showing an embodiment of the rotating body mounting device of the present invention, with the fan removed from the motor. [Figure 2] This is a perspective view showing a motor with a fan attached, illustrating an embodiment of the rotating body mounting device of the present invention. [Figure 3]This is a cross-sectional view showing a motor with a fan attached, illustrating an embodiment of the rotating body mounting device of the present invention. [Figure 4] Figure 3 is a magnified view of the boss mounting area. [Figure 5] This is a plan view of the boss mounting bracket. [Figure 6] This is a front view of the boss mounting bracket. [Figure 7] This is a bottom view of the boss mounting bracket. [Figure 8] This is a cross-sectional view AA in Figure 6. [Figure 9] This is a top-view perspective of the boss mounting bracket. [Figure 10] This is a perspective view of the boss mounting bracket from below. [Figure 11] This is a floor plan of the boss. [Figure 12] This is a front view of the boss. [Figure 13] This is a bottom view of the boss. [Figure 14] Figure 13 is a cross-sectional view of BB. [Figure 15] This is a top-down perspective view of the boss. [Figure 16] This is a bottom-view perspective of the boss. [Figure 17] This is a plan view of the power transmission section. [Figure 18] This is a front view of the power transmission section. [Figure 19] This is a bottom view perspective of the power transmission section. [Figure 20] This is an enlarged cross-sectional view showing the boss mounting state. [Figure 21] This is a magnified view showing how the motor pin is embedded in the bottom of the groove. [Figure 22] This is a cross-sectional view showing a motor with a fan attached, illustrating a second embodiment of the rotating body mounting device of the present invention. [Figure 23] This is a bottom view perspective of the boss and cylindrical member. [Figure 24] This is an enlarged cross-sectional view showing the boss mounting state. [Figure 25] This is a magnified view showing how the motor pin is embedded in the bottom of the groove. [Modes for carrying out the invention]

[0025] This embodiment is a rotating body mounting device for attaching a range hood fan to a motor, where the range hood is an air treatment device and the fan is a rotating body. The overall configuration of the rotating body mounting device will be explained with reference to Figures 1 to 4. Figure 1 is a front view with the fan removed from the motor, Figure 2 is a perspective view with the fan attached to the motor, Figure 3 is a cross-sectional view with the fan attached to the motor, and Figure 4 is an enlarged view of the boss mounting portion in Figure 3. As shown in Figure 1, a motor pin 3 is attached to the motor shaft 2 of the motor 1 so as to be perpendicular to the axial direction. On the motor shaft 2, towards the tip side of the motor pin 3 (opposite to the motor 1), an engaging portion 4, such as a screw groove, which constitutes a one-touch attachment / detachment device described later, is formed.

[0026] As shown in Figures 1 and 2, the fan 5 is a sirocco fan in which multiple blades 5c are mounted at intervals along the circumference between a circular top plate 5a and a circular ring body 5b. As shown in Figure 3, the fan 5 has a boss mounting bracket 6, a boss 7 attached to the motor 1 side of the boss mounting bracket 6, and a one-touch attachment / detachment device 8 attached to the opposite side of the boss mounting bracket 6 from the motor 1. The boss mounting bracket 6 is fixed to the fan 5 by a power transmission unit 9. The boss 7 is made of an elastic material.

[0027] As shown in Figure 4, the boss mounting bracket 6 has a motor shaft insertion hole 60 into which the motor shaft 2 is inserted, and a boss mounting surface 61 that is continuous with the area around the motor shaft insertion hole 60, with the boss mounting surface 61 facing the motor 1. The boss 7 has a boss-side motor shaft insertion hole 70 into which the motor shaft 2 is inserted, and a groove 71 into which the motor pin 3 fits. The boss 7 is mounted with the side opposite to the side facing the motor 1 (hereinafter referred to as the top surface) (hereinafter referred to as the bottom surface) in contact with the boss mounting surface 61 of the boss mounting bracket 6, and the boss-side motor shaft insertion hole 70 is continuous with the motor shaft insertion hole 60 of the boss mounting bracket 6.

[0028] The attachment / detachment device 8 includes a cover 80 attached to the lower surface of the boss mounting bracket 6. Inside the cover 80 are an engaging piece 81 that engages with the engaged portion 4 of the motor shaft 2, an operating member 82 protruding from the cover 80, and a stopper member 83, etc. The engaging piece 81 is moved by a spring 84 toward an engagement position that engages with the engaged portion 4, and is moved to an engagement position that does not engage with the engaged portion 4 by operating the operating member 82. The stopper member 83 restricts the position in which the fan 5 is inserted onto the motor shaft 2. The attachment / detachment device 8 is the same as that described in Japanese Patent Publication No. 5728481, so a detailed explanation is omitted. Furthermore, the attachment / detachment device 8 is not limited to a one-touch type; it may also be a device in which a female thread is formed on the motor shaft 2, and a nut is screwed into the female thread and tightened to secure the fan.

[0029] The installation status of fan 5 is as follows: As shown in Figures 3 and 4, the motor shaft 2 is inserted into the motor shaft insertion hole 70 on the boss side of the boss 7 and the motor shaft insertion hole 60 of the boss mounting bracket 6, and with the motor pin 3 fitted into the groove 71 of the boss 7, the fan 5 is fixed to the motor 1 by the attachment / detachment device 8 so that it does not move in the axial direction of the motor shaft 2. As a result, fan 5 rotates in conjunction with motor shaft 2.

[0030] Details of the boss mounting bracket 6 will be explained based on Figures 5 to 10. Figure 5 is a plan view of the boss mounting bracket, Figure 6 is a front view of the boss mounting bracket, Figure 7 is a bottom view of the boss mounting bracket, Figure 8 is a cross-sectional view AA of Figure 6, Figure 9 is a top perspective view of the boss mounting bracket, and Figure 10 is a bottom perspective view of the boss mounting bracket. The boss mounting bracket 6 has a cylinder 62 and a disc-shaped flange 63 that is integrally provided and continuous with the perimeter of one open end of the cylinder 62, and the flange 63 is perpendicular to the longitudinal direction of the cylinder 62. The flange 63 has a dish shape with a recessed inner circumference such that the inner circumference portion (the portion on the side of the cylinder 62) 63a is located below the outer circumference portion (the portion opposite to the cylinder 62) 63b, and the flange 63 has a recess 63c on its inner circumference. The inner circumferential surface of the cylinder 62 is the motor shaft insertion hole 60, and the upper surface of the inner circumferential portion 63a of the flange 63, that is, the bottom surface of the recess 63c, is the boss mounting surface 61.

[0031] The continuous portion between the inner circumferential surface of the cylinder 62 and the inner circumferential portion 63a of the flange 63 is curved in a funnel shape, and the inner diameter of the opening of the motor shaft insertion hole 60 on the motor 1 side gradually increases toward the motor 1, forming an insertion guide portion 64. The outer peripheral end of the insertion guide portion 64 is located on the outer peripheral side of the inner peripheral surface of the boss-side motor shaft insertion hole 70 (see Figure 20). The insertion guide portion 64 may also have a funnel-shaped inclination. With this configuration, Motor shaft 2 into motor shaft insertion hole 60 When inserting, the tip of motor shaft 2 but Insertion guide section 64 to Since it will guide you through insertion, Motor shaft 2 into motor shaft insertion hole 60 It is easy to insert.

[0032] Rotation transmission holes 65 and positioning holes 66 are formed in the inner circumference portion 63a of the flange 63. The rotation transmission holes 65 are oval in shape with their long axis oriented toward the center of the motor shaft insertion hole 60, and four of them are formed at 90-degree intervals in the circumferential direction. The positioning hole 66 is circular and one is formed there. The outer peripheral portion 63b of the flange 63 is the fixed portion to which the power transmission unit 9 is secured, and a plurality of fixing rings 67 are formed protruding from the upper surface. Outer peripheral part 63b A cover fixing ring 68 for securing the cover 80 is formed to protrude from the bottom surface.

[0033] The details of boss 7 will be explained based on Figures 11 to 16. Figure 11 is a plan view of the boss, Figure 12 is a front view of the boss, Figure 13 is a bottom view of the boss, Figure 14 is a cross-sectional view of BB of Figure 13, Figure 15 is a top perspective view of the boss, and Figure 16 is a bottom perspective view of the boss. Note that in Figure 14, the side of boss 7 facing motor 1 (top surface) is shown as the bottom. The boss 7 has a roughly cylindrical shape with a large-diameter lower circular portion 72 and a small-diameter upper circular portion 73 integrated with the upper surface of the lower circular portion 72, and an annular pressing surface 74 near the lower part of its outer circumference, with the pressing surface 74 facing upward. The lower surface 72a of the lower circular portion 72 is the lower surface of the boss 7, and the upper surface 73a of the upper circular portion 73 is the upper surface of the boss 7. A boss-side motor shaft insertion hole 70 is formed continuously on the lower surface 72a of the lower circular portion 72 and the upper surface 73a of the upper circular portion 73, and a groove 71 is formed on the upper surface 73a of the upper circular portion 73. The groove 71 opens to the upper surface 73a of the upper circular portion 73 and to the inner and outer surfaces and is shaped toward the center of the boss-side motor shaft insertion hole 70, and four grooves are formed at 90-degree intervals in the circumferential direction to form a cross shape.

[0034] The outer diameter of the lower circular portion 72 is the same as the inner diameter of the recess 63c of the boss mounting bracket 6, so that the lower circular portion 72 fits into the recess 63c and the lower surface 72a contacts the bottom surface (boss mounting surface 61) of the recess 63c. A downward-facing recess 75 is formed on the inner circumference side (boss-side motor shaft insertion hole 70 side) of the lower surface 72a of the lower circular portion 72, and the lower surface 72a has a stepped shape in which the inner circumference lower surface 72a-1 is located above the outer circumference lower surface 72a-2 (opposite side of the boss-side motor shaft insertion hole 70). In Figure 14, the lower surface 72a of the lower circular portion 72 is shown as the top. As a result, with the lower circular portion 72 fitted into the recess 63c of the boss mounting bracket 6, the outer peripheral lower surface 72a-2 contacts the bottom surface (boss mounting surface 61) of the recess 63c, and the inner peripheral lower surface 72a-1 separates from the bottom surface (boss mounting surface 61) of the recess 63c, creating a gap between them.

[0035] The lower surface 72a of the lower circular portion 72 has a rotation transmission projection 76 and a positioning projection 77 formed thereon. The rotation transmission projection 76 is an elongated oval shape, longer in the direction toward the center of the boss-side motor shaft insertion hole 70, and is formed across the inner circumferential lower surface 72a-1 and the outer circumferential lower surface 72a-2, with four of them formed at 90-degree intervals in the circumferential direction. Each rotation transmission projection 76 is located directly below each groove 71 and is in the same position in the circumferential direction. With the lower circular portion 72 of the boss 7 fitted into the recess 63c of the boss mounting bracket 6, the rotation transmission projection 76 fits into the rotation transmission hole 65. The positioning projection 77 is cylindrical in shape and is formed across the inner lower surface 72a-1 and the outer lower surface 72a-2. When the lower circular portion 72 of the boss 7 is fitted into the recess 63c of the boss mounting bracket 6, the positioning projection 77 fits into the positioning hole 66. This configuration ensures that the rotational force of the boss 7 is reliably transmitted to the boss mounting bracket 6, preventing deformation of the boss 7 during the transmission of rotational force.

[0036] Details of the power transmission unit 9 will be explained based on Figures 17 to 19. Figure 17 is a plan view of the power transmission unit, Figure 18 is a front view of the power transmission unit, and Figure 19 is a bottom perspective view of the power transmission unit. The power transmission section 9 has a shape in which an outer ring-shaped plate 90 and an inner circular plate 91 are integrally connected by a plurality of ribs 92, with the inner circular plate 91 positioned below the outer ring-shaped plate 90. The outer ring-shaped plate 90 has a connecting portion 93, such as a slit, which connects to the blade 5c of the fan 5, and the inner circular plate 91 has a hole 94 into which the upper circular portion 73 of the boss 7 fits, and a fixing hole 95 into which the fixing ring 67 of the boss mounting bracket 6 fits.

[0037] The mounting state of boss 7 will be explained in detail based on Figure 20. Figure 20 is an enlarged cross-sectional view showing the boss mounting state, and the motor shaft 2, fan 5, attachment / detachment device 8, etc. are not shown. The lower circular portion 72 of the boss 7 fits into the recess 63c of the boss mounting bracket 6, and the outer peripheral lower surface 72a-2 of the lower surface 72a of the lower circular portion 72, that is, the outer peripheral lower surface of the boss 7, contacts the boss mounting surface 61 (the bottom surface of the recess 63c), and a gap 10 is formed between the inner peripheral lower surface 72a-1 of the lower surface 72a of the lower circular portion 72, that is, the inner peripheral lower surface of the boss 7, and the boss mounting surface 61 (the bottom surface of the recess 63c). The gap 10 is an annular shape that is continuous in the circumferential direction. The gap 10 is not a complete cavity, and may have linear or hemispherical protrusions that project downward from the inner peripheral lower surface 72a, or project upward from the upper surface of the inner peripheral portion 63a of the flange 63.

[0038] Since the rotation transmission projection 76 of the boss 7 is fitted into the rotation transmission hole 65 of the boss mounting bracket 6, the rotation of the boss 7 is transmitted to the boss mounting bracket 6 via the rotation transmission projection 76, and the boss 7 and the boss mounting bracket 6 rotate together as a single unit. The boss 7 receives rotational force from the motor pin 3 fitted into the groove 71, and transmits this rotational force to the boss mounting bracket 6 via the rotation transmission projection 76. However, since the groove 71 and the rotation transmission projection 76 are located in the same position in the circumferential direction, the position where the rotational force is applied and the position where the rotational force is transmitted are the same in the circumferential direction. As a result, no excessive force acts in the circumferential direction between the groove 71 and the rotation transmission projection 76 of the boss 7, and the boss 7 does not deform.

[0039] With the boss 7 attached to the boss mounting bracket 6, the hole 94 of the power transmission section 9 is fitted into the upper circular section 73 of the boss 7, the inner circular plate 91 is brought into contact with the pressing surface 74 of the boss 7, and the fixing hole 95 is fitted into the fixing ring 67 of the boss mounting bracket 6. Then, the fixing ring 67 is crimped to fix the inner circular plate 91 of the power transmission unit 9 and the inner portion 63b of the flange 63 of the boss mounting bracket 6, and the inner circular plate 91 fixes the outer lower surface 72a-2 of the lower circular portion 72 of the boss 7 to the boss mounting surface 61 of the boss mounting bracket 6. Preferably, it is fixed by pressing. With this configuration, the power transmission unit 9 and the boss mounting bracket 6 are securely fixed together, and the power transmission unit 9 can press the boss 7 against the boss mounting bracket 6 for secure attachment.

[0040] Fan 5 is attached to motor 1 as follows: Attachment and Detachment With the operating member 82 of the device 8 in an engaged position where the engaging piece 81 is not engaged with the engaged part 4, the fan 5 is moved toward the motor 1 as indicated by arrow a in Figure 1, and as shown in Figures 3 and 4, the boss-side motor shaft insertion hole 70 of the boss 7 and the motor shaft insertion hole 60 of the boss mounting bracket 6 are sequentially inserted onto the motor shaft 2, and the groove 71 of the boss 7 is fitted onto the motor pin 3. The inner diameter of the boss-side motor shaft insertion hole 70 is larger than the outer diameter of the motor shaft 2, and the motor shaft 2 may be inserted into the boss-side motor shaft insertion hole 70 at an angle. As shown in Figure 20, the gap 10 is continuous up to the boss-side motor shaft insertion hole 70, so the tip of the motor shaft 2 inserted at an angle into the boss-side motor shaft insertion hole 70 may interfere with the boss mounting surface 61 in the gap 10 and not be inserted into the motor shaft insertion hole 60. However, since there is an insertion guide portion 64, the tip of the motor shaft 2 inserted at an angle is guided along the insertion guide portion 64 into the motor shaft insertion hole 60, so the motor shaft 2 can be smoothly inserted into the motor shaft insertion hole 60.

[0041] With the bottom of groove 71 of boss 7 fitted onto motor pin 3, the fan 5 is inserted. Attachment and Detachment The stopper member 83 of the device 8 is pushed toward the motor 1 until it contacts the tip surface of the motor shaft 2, causing the motor pin 3 to bite into the bottom of the groove 71. In other words, the distance from the tip surface of the motor shaft 2 to the motor pin 3 is shorter than the distance between the bottom of the groove 71 and the stopper member 83. To put it another way, the distance from the engaged portion 4 of the motor shaft 2 to the motor pin 3 is shorter than the distance between the bottom of the groove 71 and the engagement position.

[0042] In this state, the operating member 82 is operated to move the engaging piece 81 to the engaging position and engage with the engaged portion 4 of the motor shaft 2, thereby fixing the fan 5 so that it does not move in the axial direction of the motor shaft 2 with the motor pin 3 biting into the bottom of the groove 71, and thus the fan 5 is attached to the motor 1. The motor pin 3 is simply fitted into the groove 71, and the groove 71 bottom It doesn't need to be integrated into the department. As a result, fan 5 rotates in conjunction with motor shaft 2.

[0043] In the rotating body mounting device of this embodiment, it is only necessary to fit the motor pin 3 into the groove 71 of the boss 7, fan It's easy to attach the 5. Furthermore, because a gap 10 is formed between the inner lower surface of the boss 7 and the boss mounting surface 61 (the bottom surface of the recess 63c), the rotation of the motor shaft 2 fanWhen 5 is rotating, the boss 7 vibrates slightly in the axial direction of the motor shaft 2, and when the motor pin 3 is strongly pressed against the bottom of the groove 71, the boss 7 is prone to elastic deformation, so the boss 7 is not a rigid elastic body. fan When the rotation of 5 begins or stops, the motor pin 3 does not move relative to the boss 7. fan This design prevents the boss 7 from cracking and the motor pin 3 from bending, ensuring that part 5 rotates stably, resulting in a highly durable component.

[0044] In other words, the rotating body mounting device of this embodiment makes it easy to mount the fan 5, allows the fan 5 to rotate stably, and provides a rotating body mounting device with excellent durability. Furthermore, if the motor pin 3 is embedded in the bottom of the groove 71, fan When starting or stopping rotation of 5, ensure that the motor pin 3 does not move relative to the boss 7. fan This makes the rotation of the 5th rotation even more stable.

[0045] Next, the state in which the motor pin 3 is embedded in the groove 71 with the fan 5 installed will be explained with reference to Figure 21. Figure 21 is an enlarged view showing the state in which the motor pin is embedded in the groove, and the fan 5, attachment / detachment device 8, etc. are not shown. As shown in Figure 21, the outer peripheral lower surface 72a-2 of the lower circular portion 72 of the boss 7, that is, the outer peripheral lower surface of the boss 7, is in contact with the boss mounting surface 61, and there is a gap 10 between the inner peripheral lower surface 72a-1 of the lower circular portion 72, that is, the inner peripheral lower surface of the boss 7, and the boss mounting surface 61. The outermost end of the motor pin 3, furthest from the motor shaft 2, is located outside the gap 10. The central portion 3a of the motor pin 3 on the motor shaft 2 side bites into the inner portion 71a, which is opposite the inner circumferential lower surface 72a-1 at the bottom of the groove 71. The tip portion 3b of the motor pin 3 bites into the outer portion 71b, which is outside the inner portion 71a and is opposite the outer circumferential lower surface 72a-2 at the bottom of the groove 71.

[0046] The pressing force required to engage the central portion 3a of the motor pin 3 with the inner portion 71a at the bottom of the groove 71 is smaller than the pressing force required to engage the tip portion 3b of the motor pin 3 with the outer portion 71b at the bottom of the groove 71, due to the presence of the air gap 10. When the tip portion 3b of the motor pin 3 bites into the outer portion 71b at the bottom of the groove 71, the boss 7 undergoes elastic compression deformation. However, a portion of this elastic compression deformation escapes into the gap 10, so the pressing force required to bite the tip portion 3b of the motor pin 3 into the outer portion 71b at the bottom of the groove 71 is smaller than when there is no gap 10. Therefore, the pressing force required to engage the motor pin 3 with the bottom of the groove 71 is smaller than when there is no gap 10, allowing the fan 5 to rotate stably by using a hard material for the boss 7, and making it easier to attach the fan 5 to the motor 1.

[0047] Furthermore, the outermost end of the motor pin 3 is located outside the gap 10, and the tip portion 3b of the motor pin 3 bites into the outer portion 71b at the bottom of the groove 71, and this outer portion 71b faces the portion that is in contact with the boss mounting surface 61. As a result, the motor pin 3 is stabilized in the axial direction, preventing the fan 5 from oscillating perpendicular to the axial direction of the motor shaft 2 when the fan 5 rotates, and allowing the fan 5 to rotate stably. Furthermore, the outermost end of the motor pin 3 may be positioned inside the gap 10 so that the entire motor pin 3 bites into the inner portion 71a facing the inner circumferential lower surface 72a-1 at the bottom of the groove 71.

[0048] Furthermore, the gap 10 extends to the boss-side motor shaft insertion hole 70 of the boss 7, and the inner circumference portion 7a that forms the inner circumference lower surface of the boss 7 is supported only by the outer circumference portion 7b that forms the outer circumference lower surface when attached to the boss mounting bracket 6. As a result, the inner circumference portion 7a is easily distorted, and when the motor pin 3 is driven into the bottom of the groove 71, the inner circumference portion 7a distorts, which can reduce the pressing force of the fan 5. Therefore, it is easier to attach the fan 5 to the motor 1. Note that the gap 10 is the boss-side motor shaftIt is not necessary to extend the insertion hole 70 continuously. For example, an upward projection may be provided on the inside of the recess 63c of the boss mounting bracket 6, and the inner lower surface of the inner circumferential portion 7a of the boss 7 may be brought into contact with the upward projection, forming a gap between the outer circumferential side of the upward projection and the inner lower surface 72a-1.

[0049] Furthermore, the shape of the lower surface of the boss 7 is a stepped shape in which the inner lower surface is positioned above the outer lower surface, forming a gap 10 between the inner lower surface and the boss mounting surface 61. As a result, the thickness (in the vertical direction) of the inner portion 7a of the boss 7 is thinner than the thickness (in the vertical direction) of the outer portion 7b. The inner portion 7a of the boss 7 is more prone to deformation, and the pressing force required to engage the central portion 3a of the motor pin 3 with the inner portion 71a at the bottom of the groove 71 can be reduced. Therefore, it is easier to attach the fan 5 to the motor 1. Alternatively, the lower surface of the boss 7 may be made flat, and the boss mounting surface 61 of the boss mounting bracket 6 may be made stepped so that the outer circumference is higher than the inner circumference, thereby forming a gap 10 between the flat lower surface of the boss 7 and the inner circumference of the boss mounting surface 61.

[0050] The material used for Boss 7 is an elastomer, with a hardness in the range of 60 to 90 degrees, more preferably in the range of 70 to 80 degrees. If the hardness of the elastomer is less than 60 degrees, the boss 7 is too soft, making it unstable for the motor pin 3 to transmit rotational force to the boss 7 when the fan 5 rotates, and preventing the fan 5 from rotating smoothly. If the hardness of the elastomer exceeds 90 degrees, boss 7 is too hard, so install fan 5 and then the motor pin 3 A gap is created between the motor pin 3 and the bottom of the groove 71 of boss 7, causing the motor pin 3 to collide with the groove 71 of boss 7 when the fan 5 rotates, resulting in a collision noise.

[0051] Elastomers come in two types: thermosetting elastomers and thermoplastic elastomers. Thermosetting elastomers do not soften when heated, making them difficult to mold. Thermoplastic elastomers soften when heated and return to a rubbery state when cooled, making them easy to mold and allowing for precise molding. In this embodiment, since a thermoplastic elastomer is used as the material for the boss 7, the boss 7 can be easily molded and molded with high precision to a predetermined shape.

[0052] Next, a second embodiment will be described with reference to Figures 22 to 25. Figure 22 is a cross-sectional view showing a motor with a fan attached, illustrating the second embodiment of the rotating body mounting device of the present invention; Figure 23 is a bottom perspective view of the boss and cylindrical member; Figure 24 is an enlarged cross-sectional view showing the boss mounting state; and Figure 25 is an enlarged view showing the state in which the motor pin is embedded in the bottom of the groove. As shown in Figure 22, the motor 1 and fan 5 are the same as in the first embodiment, and the boss 7 is equipped with a cylindrical member 11. The cylindrical member 11 has higher hardness than the boss 7. As shown in Figure 23, the cylindrical member 11 is located in the boss-side motor shaft insertion hole 70 of the boss 7. Down It is inserted and mounted from one side, and the motor shaft 2 is inserted into the inner circumferential surface 12 of the cylindrical member 11.

[0053] As shown in Figure 24, the boss-side motor shaft insertion hole 70 of the boss 7 extends from a position below the bottom of the groove 71 of the boss 7 to the inner circumferential lower surface 72a-1 of the lower surface 72a of the lower circular portion 72 of the boss 7, and the upper part of the boss-side motor shaft insertion hole 70 has a downward-facing step portion 70a. In other words, the inner diameter of the boss-side motor shaft insertion hole 70 in the second embodiment is larger than the inner diameter of the boss-side motor shaft insertion hole 70 in the first embodiment by an amount equivalent to the thickness of the cylindrical member 11, and the upper part has a downward-facing step portion 70a. The upper end surface 11a of the cylindrical member 11 abuts against the downward step portion 70a, and the upper end surface 11a of the cylindrical member 11 is below the bottom of the groove 71. The lower end surface 11b of the cylindrical member 11 is at the same position as the inner circumferential lower surface 72a-1 of the lower surface 72a of the lower circular portion 72 of the boss 7.

[0054] As shown in Figure 25, a cylindrical member 11 is provided in the boss-side motor shaft insertion hole 70 of the boss 7, and the motor shaft 2 is inserted into the inner circumferential surface 12 of the cylindrical member 11. Since the cylindrical member 11, which is harder than the boss 7, is interposed between the motor shaft 2 and the boss-side motor shaft insertion hole 70, even if the fan 5 is mounted with the motor pin 3 biting into the bottom of the groove 71, and the inner surface of the boss-side motor shaft insertion hole 70 elastically deforms due to the distortion of the boss 7, the cylindrical member 11 correctly maintains the orientation of the boss 7 perpendicular to the axial direction of the motor shaft 2, preventing the fan 5 from becoming oblique to the orientation perpendicular to the axial direction of the motor shaft 2. Because Boss 7 is elastic, 5 Although the fan 5 may become unstable due to slight movement relative to the motor shaft 2, the cylindrical member 11 allows the fan 5 to be held stably relative to the motor shaft 2.

[0055] When the fan 5 is installed with the motor pin 3 embedded in the bottom of the groove 71, the inner circumferential lower surface 72a-1 of the lower circular portion 72 of the boss 7 sinks downward. At the same time, the cylindrical member 11 sinks downward by the same amount, so the distance between the lower end surface 11b of the cylindrical member 11 and the boss mounting surface 61 of the boss mounting bracket 6 becomes shorter than before the fan 5 was installed, allowing the fan 5 to be held stably. In this embodiment, the upper end surface 11a of the cylindrical member 11 is the boss side motor shaft insertion of the boss 7. hole Since it is in contact with the downward-facing stepped portion 70a of 70, the cylindrical member 11 sinks down reliably. These factors work together to allow fan 5 to rotate stably.

[0056] Since the upper end surface 11a of the cylindrical member 11 is located below the bottom of the groove 71 of the boss 7, the motor pin 3 is prevented from interfering with the cylindrical member 11 when the fan 5 is installed, and the gap between the groove 71 of the boss 7 and the motor pin 3 can be minimized. Since the lower end surface 11b of the cylindrical member 11 is in the same position as the inner circumferential lower surface 72a-1 of the lower circular portion 72 of the boss 7, even if the inner circumferential portion 7a of the boss 7 is distorted after the motor pin 3 bites into the bottom of the groove 71 when the fan 5 is installed, the cylindrical member 11 is prevented from interfering with the inner circumferential portion 63a of the flange 63 of the boss mounting bracket 6. This prevents interference between the motor pin 3 and the cylindrical member 11 caused by the upper end surface 11a of the cylindrical member 11 protruding above the bottom of the groove 71 of the boss 7.

[0057] In the second embodiment, the upper end surface 11a of the cylindrical member 11 is the boss side motor shaft insertion surface. hole Since it is in contact with the downward-facing stepped portion 70a of 70, it is possible to reliably prevent the upper end surface 11a of the cylindrical member 11 from protruding above the bottom of the groove 71 of the boss 7. The lower end surface 11b of the cylindrical member 11 may be located above the inner circumferential lower surface 72a-1 of the lower circular portion 72 of the boss 7. The material of the cylindrical member 11 can be glass, resin, metal, or any other material with a higher hardness than the boss 7. Preferably, it should be a metal that is resistant to heat and impact.

[0058] In the above explanation, the range hood fan 5 was described as a rotating body, but the range hood filter can also be considered a rotating body, or any other object that is rotated by a motor, not just a fan or filter. Furthermore, while a range hood was used as an example of an air treatment device, it is not limited to this. Other examples of air treatment devices include commercial air purifiers, fryer hoods that capture oil fumes generated during cooking and release purified air, air conditioning fans equipped with large internal fans used to increase ventilation airflow in restaurants and buildings, and steam collectors that capture steam generated from cooking areas or steam discharged outside when the cooking area door is opened, remove moisture, and then release the air. [Explanation of symbols]

[0059] 1...Motor, 2...Motor shaft, 3...Motor pin, 3a...Central part, 3b...Tip part, 4...Engaged part, 5...Fan (rotating body), 6...Boss mounting bracket, 7...Boss, 7a...Inner circumference part, 7b...Outer circumference part, 8...Attachment / detachment device, 9...Power transmission part, 10...Gap, 11...Cylindrical member, 60...Motor shaft insertion hole, 61...Boss mounting surface, 62...Cylinder, 63...Flange, 63a...Inner circumference part, 63b...Outer circumference part, 64...Insertion guide part, 70...Boss-side motor shaft insertion hole, 71...Groove, 71a...Inner part at the bottom of groove 71, 71b...Outer part at the bottom of groove 71, 72...Lower circular part, 72a...Bottom surface, 72a-1...Inner circumference bottom surface (inner circumference bottom surface of boss 7), 72a-2...Outer circumference bottom surface (outer circumference bottom surface of boss 7), 73...Upper circular part.

Claims

1. A rotating body mounting device for attaching a rotating body to a motor, The motor shaft of the aforementioned motor is equipped with a motor pin. The rotating body comprises a boss mounting bracket, a boss, and a detachable device. The boss mounting bracket has a boss mounting surface around the motor shaft insertion hole into which the motor shaft is inserted. The boss is an elastic body and has a boss-side motor shaft insertion hole that is continuous with the motor shaft insertion hole, and a groove into which the motor pin fits, and is attached to the boss mounting bracket such that a gap is formed between the inner circumferential lower surface of the boss and the boss mounting surface. The rotating body mounting device is characterized in that the motor shaft is inserted into the boss-side motor shaft insertion hole and the motor shaft is fitted into the groove with the motor pins straddling a position in the axial direction of the motor shaft that overlaps with the air gap and a position in the axial direction of the motor shaft that does not overlap with the air gap, and is fixed by the attachment / detachment device so as not to move in the axial direction of the motor shaft.

2. In the rotating body mounting device according to claim 1, A rotating body mounting device in which the outermost end of the motor pin is located outside the gap.

3. A rotating body mounting device for attaching a rotating body to a motor, The motor shaft of the aforementioned motor is equipped with a motor pin. The rotating body comprises a boss mounting bracket, a boss, and a detachable device. The boss mounting bracket has a boss mounting surface around the motor shaft insertion hole into which the motor shaft is inserted. The boss is an elastic body and has a boss-side motor shaft insertion hole that is continuous with the motor shaft insertion hole, and a groove into which the motor pin fits, and is attached to the boss mounting bracket such that a gap is formed between the inner circumferential lower surface of the boss and the boss mounting surface. The rotating body mounting device is characterized in that the motor shaft is inserted into the boss-side motor shaft insertion hole and the motor shaft is engaged in the groove with the motor pins spanning a position in the axial direction of the motor shaft that overlaps with the air gap and a position in the axial direction of the motor shaft that does not overlap with the air gap, and is fixed by the attachment / detachment device so as not to move in the axial direction of the motor shaft.

4. In the rotating body mounting device according to claim 3, A rotating body mounting device in which the outermost end of the motor pin is located outside the gap, the central portion of the motor pin bites into the inner portion of the groove opposite to the lower inner surface, and the tip portion of the motor pin bites into the outer portion of the groove that is outside the inner portion.

5. In a rotating body mounting device according to any one of claims 1 to 4, The aforementioned gap extends to the motor shaft insertion hole on the boss side, and the boss is attached to the boss mounting bracket such that its inner circumference is supported only by its outer circumference in this rotating body mounting device.

6. In a rotating body mounting device according to any one of claims 1 to 4, The lower surface of the boss has a stepped shape in which the inner circumferential lower surface is positioned above the outer circumferential lower surface, the thickness of the inner circumferential portion of the boss is thinner than the thickness of the outer circumferential portion, the boss is attached to the boss mounting bracket with at least the outer circumferential lower surface of the boss in contact with the boss mounting surface, and the gap is formed between the inner circumferential lower surface of the boss and the boss mounting surface in a rotating body mounting device.

7. In a rotating body mounting device according to any one of claims 1 to 4, The aforementioned boss mounting bracket is a rotating body mounting device in which the portion of the boss mounting surface that is continuous with the opening end of the motor shaft insertion hole is curved or inclined in a funnel shape, and constitutes an insertion guide portion when the motor shaft is inserted into the motor shaft insertion hole.

8. In a rotating body mounting device according to any one of claims 1 to 4, The boss is a rotating body mounting device made of a thermoplastic elastomer with a hardness in the range of 60 to 90 degrees.

9. In a rotating body mounting device according to any one of claims 1 to 4, A rotating body mounting device comprising a cylindrical member having a higher hardness than the boss in the motor shaft insertion hole on the boss side, with the motor shaft inserted into the cylindrical member.

10. An air treatment apparatus equipped with a rotating body mounting device, characterized by comprising a rotating body mounting device according to any one of claims 1 to 4.

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