Motor and blower

Abstract

To provide a motor that can suppress entry of water into a motor case.SOLUTION: A fixed flinger 41 includes: a first cylinder drip part 41b surrounding a part of a projection part 20b; and a second annular drip part 41c projecting to the side opposite to a motor case 10 from an outer periphery of a fixed part 41a. The fixed flinger 42 includes: an opposing part 42b; and a cylindrical cover part 42c that projecting to the motor case 10 side from the opposing part 42b. A cover end surface 42d of the cover part 42c is opposite the fixed part 41a on the inside of the second annular drip part 41c.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a motor and a blower device. [Background technology]

[0002] In the conventional waterproof structure of a motor, a waterproof curled portion is formed on the main casing. The output shaft passes through the waterproof curled portion and protrudes to the outside of the main casing. A water-shedding rubber is provided on the outside of the main casing.

[0003] The drain rubber has an attachment part and a cylindrical drain part. The attachment part is attached to the output shaft. The drain part protrudes from the attachment part toward the main casing. In addition, the tip of the drain part is located closer to the main casing than the tip of the waterproof curled part (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 3-77254 Summary of the Invention [Problem to be solved by the invention]

[0005] In the conventional motor waterproof structure described above, when the motor is used with the shaft protruding downward from the main casing, water that splashes on the motor flows down along the outer surface of the main casing and enters the inside of the water-draining rubber between the waterproof curled part and the water-draining part. If water accumulates inside the water-draining rubber, it can seep into the inside of the motor through the gap between the waterproof curled part and the shaft, causing damage to parts such as the shaft and bearings.

[0006] The present disclosure has been made to solve the above-mentioned problems, and has an object to provide a motor and a blower device that can prevent water from entering the motor case. [Means for solving the problem]

[0007] A motor according to the present disclosure includes a motor case having an output end portion provided with a shaft hole, a shaft having an accommodation portion accommodated in the motor case and a protrusion portion protruding from the shaft hole to the outside of the motor case, a motor body accommodated in the motor case and rotating the shaft, and an infiltration suppression device that suppresses infiltration of water from the shaft hole into the motor case, the infiltration suppression device having a fixed flinger provided at the output end portion and a rotating flinger provided at the protrusion portion and rotating together with the shaft, the fixed flinger being The rotating flinger has a flat fixed portion fixed to the output side end, a cylindrical first water cutting portion protruding from the fixed portion toward the opposite side to the motor case and surrounding part of the protruding portion, and an annular second water cutting portion protruding from the outer periphery of the fixed portion toward the opposite side to the motor case, and the rotating flinger has an opposing portion protruding radially outward from the protruding portion and facing the tip of the first water cutting portion, and a cylindrical cover portion protruding from the opposing portion toward the motor case, and the cover end face, which is the end face of the cover portion facing the motor case, faces the fixed portion inside the second water cutting portion. Effect of the Invention

[0008] According to the present disclosure, it is possible to prevent water from entering the motor case. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a motor according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view showing a part of the motor in FIG. 1 in an exploded state. [Diagram 3] FIG. 2 is a cross-sectional view of the motor of FIG. [Figure 4] FIG. 4 is an enlarged cross-sectional view of a portion of FIG. [Diagram 5]2 is an explanatory diagram showing the flow of water adhering to the outer surface of the motor in FIG. 1. [Figure 6] 2 is an explanatory diagram showing the flow of water adhering to the outer surface of the motor shown in FIG. 1, the shaft of which is installed horizontally. FIG. [Figure 7] 2 is a perspective view showing an example of a blower in which the motor of FIG. 1 is used. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, embodiments will be described with reference to the drawings. Embodiment 1 Fig. 1 is a perspective view showing a motor according to embodiment 1. Fig. 2 is a perspective view showing a part of the motor of Fig. 1 in an exploded state. Fig. 3 is a cross-sectional view of the motor of Fig. 1. Fig. 4 is a cross-sectional view showing an enlarged part of Fig. 3.

[0011] In the figure, a motor 50 includes a motor case 10, a cylindrical shaft 20, a first bearing 21, a second bearing 22, a motor body 30, and an infiltration suppression device 40.

[0012] In the motor 50, the axial direction of the motor body 30 is a direction along the axis C of the shaft 20. The radial direction of the motor body 30 is a direction perpendicular to the axis C. The circumferential direction of the motor body 30 is a direction along a circumference centered on the axis C.

[0013] The motor case 10 has a first case 11 made of metal, a second case 12 made of metal, and a plurality of case fasteners 13.

[0014] The first case 11 has a first case body 11a, a circular ring-shaped first flange portion 11b, and a disk-shaped output side end portion 11c.

[0015] The first case body 11a has a cylindrical shape centered on the axis C. The first flange portion 11b protrudes radially outward from the motor body 30 from the end of the first case body 11a on the second case 12 side.

[0016] The output side end 11c is provided at the end of the first case body 11a opposite to the second case 12. A shaft hole 11d is provided in the center of the output side end 11c. The shaft 20 passes through the shaft hole 11d. That is, the shaft 20 penetrates the output side end 11c.

[0017] The second case 12 has a second case body 12a, a circular second flange portion 12b, and a disk-shaped end portion 12c opposite to the output side.

[0018] The second case body 12a has a cylindrical shape centered on the axis C. The diameter of the second case body 12a is the same as the diameter of the first case body 11a. The second flange portion 12b protrudes from the end of the second case body 12a on the first case 11 side toward the outside in the radial direction of the motor body 30. The second flange portion 12b is overlapped with the first flange portion 11b.

[0019] The counter-output side end 12c is provided at the end of the second case body 12a opposite to the first case 11. The end of the second case body 12a opposite to the first case 11 is closed by the counter-output side end 12c.

[0020] The second flange portion 12b is fixed to the first flange portion 11b by a plurality of case fasteners 13. That is, the second case 12 is fixed to the first case 11 by a plurality of case fasteners 13. As each case fastener 13, for example, a combination of a bolt and a nut is used.

[0021] The shaft 20 has an accommodation portion 20a and a protruding portion 20b. The accommodation portion 20a is a portion of the shaft 20 that is accommodated in the motor case 10. The protruding portion 20b is a portion of the shaft 20 other than the accommodation portion 20a. In addition, the protruding portion 20b protrudes from the shaft hole 11d to the outside of the motor case 10.

[0022] The first bearing 21 is fixed to the output side end 11c through a first housing 23 within the motor case 10. The first bearing 21 also holds an end of the accommodating portion 20a on the protruding portion 20b side.

[0023] The second bearing 22 is fixed to the non-output side end 12c in the motor case 10 via a second housing 24. The second bearing 22 holds the end of the accommodation portion 20a opposite to the protruding portion 20b. The end of the shaft 20 opposite to the protruding portion 20b is located inside the motor case 10.

[0024] The shaft 20 is supported by the motor case 10 via a first bearing 21 and a second bearing 22 so as to be rotatable about an axis C.

[0025] The motor body 30 is housed in the motor case 10. The motor body 30 rotates the shaft 20 relative to the motor case 10. The motor body 30 has a cylindrical stator 31 and a cylindrical rotor 32.

[0026] The stator 31 is fixed to the inner circumferential surface of the motor case 10. The stator 31 has a cylindrical stator core 31a and a plurality of stator coils 31b. The stator core 31a is configured by stacking a plurality of electromagnetic steel plates in the axial direction of the motor body 30. The plurality of stator coils 31b are configured by winding a plurality of electric wires around the stator core 31a.

[0027] The rotor 32 is fixed to the housing portion 20a. This allows the rotor 32 to rotate together with the shaft 20. The shaft 20 passes through the center of the rotor 32 along the axial direction of the motor body 30. A gap is provided between the outer circumferential surface of the rotor 32 and the inner circumferential surface of the stator 31 over the entire circumference of the motor body 30 in the circumferential direction.

[0028] The infiltration suppression device 40 is provided between the output side end portion 11c and the protruding portion 20b. The infiltration suppression device 40 also suppresses the infiltration of water into the motor case 10 through the shaft hole 11d.

[0029] The infiltration suppression device 40 also has a fixed flinger 41, a rotating flinger 42 made of rubber, and a number of flinger fixing devices 43.

[0030] The fixed flinger 41 is provided at the output side end 11c on the outside of the motor case 10. The fixed flinger 41 has a flat fixing portion 41a, a cylindrical first water cutter portion 41b, and an annular second water cutter portion 41c.

[0031] The fixed portion 41a is fixed to the output side end 11c by a plurality of flanger fasteners 43. As each of the flanger fasteners 43, for example, a bolt is used.

[0032] The first draining portion 41b protrudes from the center of the fixed portion 41a toward the opposite side to the motor case 10. The first draining portion 41b surrounds a part of the protruding portion 20b. That is, the end of the protruding portion 20b on the housing portion 20a side is located inside the first draining portion 41b. A first draining groove 41d is formed around the entire outer circumferential surface of the first draining portion 41b.

[0033] The second draining portion 41c protrudes from the outer periphery of the fixing portion 41a toward the opposite side to the motor case .

[0034] The fixed flinger 41 of the first embodiment has a first member 411 made of rubber and a second member 412 made of metal. That is, the fixed flinger 41 of the first embodiment is configured by combining the first member 411 and the second member 412.

[0035] The first member 411 has a disk-shaped first flat plate portion 411a and a first water cut portion 41b. The first flat plate portion 411a is overlapped with the output side end portion 11c. The first water cut portion 41b protrudes from the center of the first flat plate portion 411a to the opposite side to the motor case 10.

[0036] The second member 412 has a disk-shaped second flat plate portion 412a and a second drainage portion 41c. The second flat plate portion 412a is overlapped on the first flat plate portion 411a. The fixing portion 41a is composed of the first flat plate portion 411a and the second flat plate portion 412a.

[0037] The second water cut-off portion 41c is formed by bending the entire outer periphery of the second flat plate portion 412a toward the opposite side to the motor case 10. The angle of the second water cut-off portion 41c with respect to the fixed portion 41a is within a range of 90 degrees to 170 degrees.

[0038] 2, the second flat plate portion 412a is provided with an opening 412b and a plurality of second holes 412c. The first draining portion 41b passes through the opening 412b.

[0039] The first flat plate portion 411a is provided with a plurality of first holes 411b. The output side end portion 11c is provided with a plurality of screw holes 11e.

[0040] Each flanger fixing device 43 is passed through a corresponding second hole 412c and a corresponding first hole 411b, and is screwed into a corresponding screw hole 11e, so that the fixing portion 41a is fixed to the output side end portion 11c.

[0041] The rotating flinger 42 is provided on the protruding portion 20b. The rotating flinger 42 rotates together with the shaft 20. The rotating flinger 42 has a cylindrical attachment portion 42a, a disk-shaped opposing portion 42b, and a cylindrical cover portion 42c.

[0042] The mounting portion 42a is attached to the outer peripheral surface of the protruding portion 20b. A fitting groove 20c is provided around the entire outer peripheral surface of the protruding portion 20b. The mounting portion 42a is fitted into the fitting groove 20c. This restricts the movement of the rotating flanger 42 relative to the shaft 20 in the axial direction of the motor body 30.

[0043] The facing portion 42b projects from the protruding portion 20b toward the radially outer side of the motor body 30. The facing portion 42b faces the tip of the first draining portion 41b. The cover portion 42c projects from the outer periphery of the facing portion 42b toward the motor case 10.

[0044] 4, the cover portion 42c has a cover end surface 42d. The cover end surface 42d is an end surface of the cover portion 42c on the motor case 10 side.

[0045] The cover end surface 42d faces the fixed portion 41a inside the second water cut-off portion 41c. That is, the cover end surface 42d is located closer to the motor case 10 than the end of the second water cut-off portion 41c opposite the motor case 10 in the axial direction of the motor body 30. Also, the end of the second water cut-off portion 41c opposite the second flat plate portion 412a is farther from the motor case 10 in the axial direction of the motor body 30 than the cover end surface 42d.

[0046] A second drainage groove 44 is formed between the second drainage portion 41c and the motor case 10 around the entire periphery of the first flat plate portion 411a.

[0047] In the motor 50, the fixed flinger 41 is provided with a first water cut-off portion 41b and a second water cut-off portion 41c. The rotating flinger 42 is provided with a cover portion 42c. The cover end surface 42d faces the fixed portion 41a on the inside of the second water cut-off portion 41c. This makes it possible to prevent water from entering the motor case 10.

[0048] 5, when the motor is used with the shaft 20 projecting downward from the first case 11, water flowing down along the outer surface of the first case 11 falls along the second water cut-off portion 41c as shown by the arrow A. In other words, the second water cut-off portion 41c prevents the water flowing down along the outer surface of the first case 11 from flowing toward the shaft hole 11d.

[0049] 6 is an explanatory diagram showing the flow of water adhering to the outer surface of the motor 50 when the shaft 20 in FIG. 1 is installed horizontally. In this case, the water flowing down along the outer surface of the first case 11 flows as indicated by the arrow B, and is prevented from flowing toward the protruding portion 20b side beyond the second draining portion 41c.

[0050] Moreover, the water adhering to the rotating flinger 42 flows down along the outer circumferential surface of the cover portion 42c, and is thrown radially outward of the motor body 30 by the rotation of the rotating flinger 42. This prevents the water adhering to the rotating flinger 42 from entering the inside of the rotating flinger 42.

[0051] Furthermore, water that has entered the interior of the rotating flinger 42 flows down along the outer circumferential surface of the first water draining portion 41b, and is discharged to the outside of the rotating flinger 42 through the gap between the cover end surface 42d and the fixed portion 41a.

[0052] In this way, whether the motor 50 is used with the shaft 20 oriented vertically or horizontally, it is possible to prevent water from entering the motor case 10. Therefore, even if the motor 50 is used in an environment where it may be exposed to water, it is possible to prevent failure of the motor 50 due to water entering the motor case 10, and the durability of the motor 50 can be improved.

[0053] Moreover, the fixed flinger 41 is configured by combining the first member 411 and the second member 412. Therefore, the first cutout portion 41b and the second cutout portion 41c can be easily formed in the fixed flinger 41.

[0054] The rotating flinger 42 is attached to the outer circumferential surface of the protruding portion 20b at the attachment portion 42a. Therefore, the rotating flinger 42 can be easily provided on the shaft 20.

[0055] Moreover, the angle of the second water cut portion 41c with respect to the fixing portion 41a is within a range of 90 degrees to 170 degrees. Therefore, the intrusion of water into the motor case 10 can be more reliably prevented.

[0056] The shape of the second water cutter portion 41c when viewed along the axial direction of the motor body 30 is not limited to a circular ring.

[0057] Furthermore, the shape of the cover portion 42c when viewed along the axial direction of the motor body 30 is not limited to a circular ring.

[0058] The first draining portion 41b may be formed at the output side end portion 11c.

[0059] Additionally, the fixed flinger 41 may be constructed as a single component.

[0060] Also, the rotating flinger 42 and the shaft 20 may be configured as one component. That is, the rotating flinger 42 may be formed on the shaft 20.

[0061] Here, Fig. 7 is a perspective view showing an example of a blower using the motor 50 of Fig. 1. The blower 60 includes the motor 50, a frame 61, a plurality of arms 62, and a plurality of blades 63.

[0062] The motor 50 is supported by a frame 61 via a plurality of arms 62. A plurality of blades 63 are attached to the shaft 20. The plurality of blades 63 rotate together with the shaft 20. The rotation of the plurality of blades 63 generates an air flow.

[0063] The blower in which the motor 50 is used is not limited to the type shown in FIG.

[0064] Furthermore, the application of the motor 50 is not limited to a blower.

[0065] Although the preferred embodiments have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

[0066] Various aspects of the present disclosure are summarized below as appendices.

[0067] (Appendix 1) a motor case having an output end portion provided with a shaft hole; a shaft having a housing portion housed in the motor case and a protruding portion protruding from the shaft hole to an outside of the motor case; a motor body housed in the motor case and configured to rotate the shaft; and An intrusion prevention device for preventing water from infiltrating into the motor case through the shaft hole Equipped with The infiltration suppression device is a fixed flanger provided at the output end; a rotating flinger provided on the protrusion and rotating together with the shaft; It has The fixed fringer is A flat plate-shaped fixed portion fixed to the output side end portion; a cylindrical first drainage portion that protrudes from the fixing portion toward the opposite side to the motor case and surrounds a part of the protruding portion; a second annular cutout portion protruding from an outer periphery of the fixing portion toward the opposite side to the motor case; It has The rotating flinger is a facing portion that faces a tip end of the first water draining portion and faces outward in a radial direction of the motor body from the protruding portion; a cylindrical cover portion protruding from the opposing portion toward the motor case; It has A cover end face, which is the end face of the cover portion on the motor case side, faces the fixed portion inside the second drainage portion. (Appendix 2) The fixed flanger has a first member and a second member; The first member has a first flat plate portion overlapping the output side end portion and the first drainage portion, The second member has a second flat plate portion overlapping the first flat plate portion and the second drainage portion, The second flat plate portion has an opening through which the first drainage portion passes, 2. The motor according to claim 1, wherein the fixed portion is constituted by the first flat plate portion and the second flat plate portion. (Appendix 3) 3. The motor of claim 1 or 2, wherein the rotating flanger further includes a mounting portion attached to an outer peripheral surface of the protrusion. (Appendix 4) The motor according to any one of claims 1 to 3, wherein an angle of the second cutout portion relative to the fixed portion is within a range of 90 degrees to 170 degrees. (Appendix 5) A motor according to any one of appendices 1 to 4. A blower device comprising: [Explanation of symbols]

[0068] 10 motor case, 11c output side end portion, 11d shaft hole, 20 shaft, 20a storage portion, 20b protrusion portion, 30 motor body, 40 infiltration suppression device, 41 fixed flanger, 41a fixed portion, 41b first water draining portion, 41c second water draining portion, 411 first member, 411a first flat plate portion, 412 second member, 412b opening, 42 rotating flanger, 42a mounting portion, 42b opposing portion, 42c cover portion, 42d cover end surface, 50 motor, 60 blower device.

Claims

1. a motor case having an output end portion provided with a shaft hole; a shaft having a housing portion housed in the motor case and a protruding portion protruding from the shaft hole to an outside of the motor case; a motor body housed in the motor case and configured to rotate the shaft; and An intrusion prevention device for preventing water from infiltrating into the motor case through the shaft hole Equipped with The infiltration suppression device is a fixed flanger provided at the output end; a rotating flinger provided on the protrusion and rotating together with the shaft; It has The fixed fringer is A flat plate-shaped fixed portion fixed to the output side end portion; a cylindrical first drain portion that protrudes from the fixing portion toward an opposite side to the motor case and surrounds a part of the protruding portion; a second annular cutout portion protruding from an outer periphery of the fixing portion toward an opposite side to the motor case; It has The rotating flinger is a facing portion that faces a tip end of the first water draining portion and faces outward in a radial direction of the motor body from the protruding portion; a cylindrical cover portion protruding from the opposing portion toward the motor case; It has A motor in which a cover end face, which is the end face of the cover portion on the motor case side, faces the fixed portion inside the second drainage portion.

2. The fixed flinger has a first member and a second member; The first member has a first flat plate portion overlapping the output side end portion and the first drainage portion, The second member has a second flat plate portion overlapped on the first flat plate portion and the second drainage portion, The second flat plate portion has an opening through which the first drainage portion passes, The motor according to claim 1 , wherein the fixed portion is constituted by the first flat plate portion and the second flat plate portion.

3. 3. The motor according to claim 1, wherein the rotating flinger further comprises a mounting portion attached to an outer circumferential surface of the protrusion.

4. 3. The motor according to claim 1, wherein an angle of the second cutout portion with respect to the fixed portion is within a range of 90 degrees to 170 degrees.

5. The motor according to claim 1 or 2. A blower device comprising:

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