JP2014190291A - Ceiling fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To disperse stress generating in a blade part and to improve intensity of the blade part further, in respect to a ceiling fan.SOLUTION: A ceiling fan includes a plurality of reinforcement parts 23 which extend from a root part 12 to the middle of a vane part 13, and in which a horizontal cross-sectional shape is a concave shape. An end part on the root side of the vane part 13 of a second dent part 22 is located closer to a tip of the vane part 13 as heading toward an upstream side 11c from a downstream side 11b. A dimension from an end part on the downstream side of the blade part 11 toward the upstream side at the root side of the vane part 13 of the second dent part 22 is larger than the dimension from an end part of the upstream side 11c of the blade part 11 toward the downstream side 11b at a first dent part 21. The length of the reinforcement part 23 becomes longer as heading toward the upstream side 11c from the downstream side 11b, and also a dimension of the reinforcement part 23 in a rotational direction 11a of the blade part 11 at the vane part 13 is smaller in the upstream side 11c than in the downstream side 11b.

Description

  The present invention relates to a ceiling fan suspended from a ceiling.

  Conventionally, the configuration of this type of ceiling fan has been as follows. That is, a pipe portion that can be engaged with the ceiling, a motor portion provided at the lower portion of the connecting portion, a support portion that is rotatably provided at the periphery of the motor portion, and a plurality of detachably provided on the support portion The blade part is composed of a metal blade part, and the blade part includes a root part fixed to the support part, a wing part that blows air as the support part rotates, and the root part and the wing part. The wing portion formed between the wing portion and the step portion which is inclined from the horizontal is formed, and the wing portion is bent downward toward the downstream side in the rotation direction of the wing portion. And it became the structure provided with the some reinforcement part in the center of the blade | wing part.

  For example, a similar prior document is described in Patent Document 1 below.

JP 2009-121243 A

  The problem in the above conventional example was to further improve the strength of the blade portion.

  That is, as the reaction of the blade portion rotating and pushing down the air, stress is generated in the step portion of the blade portion, and in long-term use, it may be damaged due to metal fatigue due to repeated load.

  Conventionally, a reinforcing part is provided in the blade part, and the strength is improved by this reinforcing part. As a result, the strength of the part provided with the reinforcing part is improved, but the stress is concentrated in the part not provided with the reinforcing part, and the concentrated part is damaged due to metal fatigue due to repeated load in long-term use. There was a case.

  In view of the above, an object of the present invention is to disperse the stress generated in the blade portion and further improve the strength of the blade portion.

  In order to achieve this object, the present invention includes a connecting portion that can be engaged with the ceiling, a motor portion provided at a lower portion of the connecting portion, and a support portion that is rotatably provided at the periphery of the motor portion. And a plurality of metal blade portions detachably provided on the support portion. The blade portion blows air by rotating a root portion fixed to the support portion and the support portion. It is integrally formed from a wing part and a step part that maintains the wing part provided between the root part and the wing part in a state inclined from the horizontal, and the wing part has a rotational direction of the wing part. A first indented portion recessed downward on the upstream side, a second indented portion recessed downward on the downstream side in the rotational direction of the blade portion, and a midway of the wing portion from the root portion And a plurality of reinforcing portions having a concave horizontal cross-sectional shape, The distance extending obliquely downward from the root portion increases from the flow side to the upstream side, and the first depression portion is inclined downward from the downstream side to the upstream side, and the second depression portion. The dimension from the downstream end of the blade part to the upstream side is such that the base side of the wing part is larger than the tip side, and the end part of the wing part of the second recess is downstream. As it goes from the side toward the upstream side, it is located closer to the tip of the wing part, and on the base side of the wing part of the second recess part, the dimension from the downstream end part to the upstream side of the wing part is , Larger than the dimension from the upstream end of the blade portion to the downstream side in the first recess, the length of the reinforcing portion becomes longer from the downstream side toward the upstream side, The size of the reinforcing part at the wing part in the rotational direction of the blade part is upstream. Is obtained by being smaller than the downstream side, thereby is to achieve the intended purpose.

  According to the present invention, the connecting portion that can be engaged with the ceiling, the motor portion provided at the lower portion of the connecting portion, the supporting portion that is rotatably provided at the periphery of the motor portion, and the mounting portion can be attached to and detached from the supporting portion. A plurality of metal blade portions provided, the blade portion is fixed to the support portion, a blade portion that blows air by rotating the support portion, and the root portion The wing portion provided between the wing portions is integrally formed with a stepped portion that maintains an inclined state from the horizontal, and the wing portion is directed downward on the upstream side in the rotation direction of the wing portion. A recessed first recess, a second recessed recess recessed downward in the rotational direction of the blade portion, and extending from the root portion to the middle of the wing portion. A plurality of reinforcing portions having a shape, and the stepped portion extends from the downstream side toward the upstream side. Accordingly, the distance extending obliquely downward from the root portion increases, the first recess portion inclines downwardly from the downstream side toward the upstream side, and the second recess portion corresponds to the blade portion. The dimension from the downstream end to the upstream is such that the base side of the wing part is larger than the tip side, and the base side end part of the wing part of the second recess is directed from the downstream side to the upstream side. Accordingly, the dimension from the downstream end portion to the upstream side of the blade portion on the base side of the blade portion of the second recess portion is closer to the first recess portion. And the length of the reinforcing part becomes longer from the downstream side toward the upstream side, and the reinforcement at the wing part is larger than the dimension from the upstream end of the blade part to the downstream side. The size of the blade in the rotational direction of the blade is characterized in that the upstream side is smaller than the downstream side. It is intended to be one in which it is possible to further improve the strength of the blade part.

  The dimension from the downstream end of the blade portion to the upstream side on the base side of the wing portion of the second recess portion is from the upstream end portion of the blade portion to the downstream side in the first recess portion. Therefore, the stress concentration between the stepped portion, the first dent portion, and the second dent portion is larger on the downstream side than on the upstream side.

  Therefore, a plurality of reinforcing portions are provided in order to relieve stress concentration between the step portion, the first dent portion, and the second dent portion.

  That is, the length of the reinforcing portion becomes longer as it goes from the downstream side to the upstream side, and the size in the rotation direction of the blade portion of the reinforcing portion at the wing portion is smaller on the upstream side than on the downstream side. Thereby, although the length of a reinforcement part is short compared with the upstream side on the downstream side, since the dimension in the rotation direction of a reinforcement part is large, stress concentration is eased more. On the other hand, on the upstream side, the stepped portion has a distance extending obliquely downward from the root portion as it goes from the downstream side to the upstream side, so stress concentration is relaxed on the upstream side compared to the downstream side. Therefore, compared with the downstream side, the length of the reinforcing portion is longer on the upstream side, but by reducing the size of the reinforcing portion in the rotational direction, the stress concentration is further reduced, and the upstream side and the downstream side This improves the balance of stress concentration.

  As a result, it is possible to disperse the stress concentration generated in the blade portion and further improve the strength of the blade portion.

The figure which shows the outline | summary of the ceiling fan of Embodiment 1 of this invention The figure which shows the outline | summary of the base part of the blade | wing part in the ceiling fan The figure which shows the outline of the blade part in the ceiling fan

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram showing an outline of a ceiling fan according to an embodiment of the present invention. FIG. 2: is the figure which looked at the outline | summary of the base part of the blade | wing part in the ceiling fan main body of embodiment of this invention from the bottom. FIG. 3 is a top view of the blade portion of the ceiling fan body according to the embodiment of the present invention.

  As shown in FIGS. 1 to 3, the ceiling fan includes a suspended portion 2 fixed to the ceiling 1 and a ceiling fan body 3 that can be engaged via the suspended portion 2. The ceiling fan main body 3 includes a connecting portion 4, a motor portion 7, a blade portion 11, and a main body cover portion 16.

  The ceiling fan body 3 includes a connecting portion 4 that can be suspended from the suspended portion 2 at the upper portion. The connecting portion 4 includes a joint portion 5 that is directly hooked to the suspended portion 2 and a cylindrical pipe portion 6 that is fixed to the lower portion of the joint portion 5.

  A motor portion 7 is fixed to the lower portion of the pipe portion 6. The motor unit 7 includes a substantially disk-shaped stator unit (not shown) fixed to the lower portion of the pipe portion 6 and a substantially ring-shaped rotor unit (not shown) that can freely rotate the outer periphery of the stator unit. doing. The lower surface of the rotor portion is provided with a bowl-shaped motor lower cover 20 that covers the lower surface of the rotor portion. A support portion 10 is provided on the side peripheral surface of the motor lower cover 20. The support portion 10 includes two fixing portions 17 that are screw holes. A plurality of detachable metal blades 11 are fixed to the screw holes by screws which are connecting means 18. The blade portion 11 is fixed so as to extend outward from the motor lower cover 20. A receiving portion 19 that is a flat surface is provided on the peripheral edge of the lower surface of the motor lower cover 20.

  In a state where the upper surface of the root portion 12, which will be described later, of the blade portion 11 is in contact with the lower surface of the motor lower cover 20, that is, the receiving portion 19, the blade portion 11 can be attached to and detached from the screw hole with the screw as the connecting means 18. A plurality of metal blade portions 11 are fixed. The blade portion 11 is fixed so as to extend outward from the motor lower cover 20.

  The blade part 11 is made of a metal plate, and includes a root part 12, a wing part 13, and a step part 14.

  The root portion 12 is positioned on the motor portion 7 side, which is one side of the blade portion 11, and has a fixed hole portion 15 that is two circular holes that are fixed to the support portion 10 in a substantially square plate shape. Each fixing hole portion 15 is located near the end portion on the upstream side 11 c and the end portion on the downstream side 11 b in the rotation direction 11 a of the blade portion 11. The blade portion 11 is fixed to the lower surface of the support portion 10 by fixing the screw as the connecting means 18 to the two screw holes as the fixing portion 17 of the support portion 10 through the fixing hole portion 15.

  By fixing the screw as the connecting means 18 to the two screw holes as the fixing portion 17 of the support portion 10 through the fixing hole portion 15 of the blade portion 11, the blade portion 11 and the motor lower cover 20 are supported. It is fixed to the part 10.

  The wing part 13 is located on the outer side, which is the other side of the blade part 11, and is a part that blows air when the rotor part rotates.

  The step portion 14 is located between the root portion 12 and the wing portion 13 and maintains the wing portion 13 in a state inclined from the horizontal. The step portion 14 has a flat plate shape extending from the end portion of the root portion 12 to the end portion of the wing portion 13, and the root portion 12 extends from the downstream side 11 b to the upstream side 11 c in the rotation direction 11 a of the arrow of the blade portion 11. The distance that extends diagonally downward from is increased. That is, the step 14 is a substantially triangular flat plate.

  The root portion 12, the wing portion 13, and the stepped portion 14 are integrally formed. That is, it is manufactured by pressing from a single metal plate.

  The blowing operation of the ceiling fan will be described. In the ceiling fan, when the motor unit 7 is energized, the rotor unit that is the motor unit 7 rotates. By this rotation, the blade portion 11 fixed to the support portion 10 at the periphery of the rotor portion also rotates. Here, since the wing part 13 is inclined obliquely downward as it goes from the downstream side 11b to the upstream side 11c in the rotation direction 11a of the blade part 11 by the step part 14, the wing part 13 flows along the lower surface of the wing part 13. Air is blown from the ceiling side toward the floor.

  A feature of this embodiment is the shape of the blade portion 11.

  The wing part 11 has a first dent part 21, a second dent part 22, and a reinforcing part 23.

  The first hollow portion 21 has a shape that is depressed downward, and is provided on the upstream side 11 c in the rotation direction 11 a of the blade portion 11 of the wing portion 13. The 1st hollow part 21 inclines below as it goes to the upstream 11c from the downstream 11b.

  The second recess 22 has a shape that is recessed downward, and is provided on the downstream side 11 b in the rotation direction 11 a of the blade 11 of the wing 13. As for the 2nd hollow part 22, the dimension from the edge part of the downstream side 11b of the blade | wing part 11 to the upstream side 11c is larger than the front end side at the base side of the wing | blade part 13. As shown in FIG. The end 24 on the base side of the wing part of the second hollow part 22 is located closer to the tip of the wing part 13 as it goes from the downstream side 11b to the upstream side 11c. Here, the dimension from the end of the downstream side 11b of the blade part 11 to the upstream side 11c on the base side of the wing part 13 of the second hollow part 22 is the blade part 11 of the first hollow part 21. It is larger than the dimension from the end of the upstream side 11c to the downstream side 11b.

  The reinforcement part 23 is extended from the root part 12 to the middle of the wing | blade part 13, the horizontal cross-sectional shape is concave shape, and is provided with two or more. The tip of the reinforcing portion 23 on the downstream side 11 b is located between the stepped portion 14 and the second recessed portion 22. The length of the reinforcing part 23 becomes longer as it goes from the downstream side 11b to the upstream side 11c, and the dimension in the rotation direction 11a of the blade part 11 of the reinforcing part 23 at the wing part 13 is such that the upstream side 11c is the downstream side 11b. It is smaller than

  With the above configuration, the dimension from the end of the downstream side 11b of the blade part 11 to the upstream side 11c on the base side of the wing part 13 of the second recess part 22 is the blade at the first recess part 21. Since the dimension from the end of the upstream side 11c of the part 11 to the downstream side 11b is larger, the stress concentration between the stepped part 14, the first dent part 21, and the second dent part 22 is on the upstream side 11c. In comparison, the downstream side 11b becomes larger.

  Therefore, a plurality of reinforcing portions 23 are provided to alleviate the stress concentration between the step portion 14, the first dent portion 21, and the second dent portion 22.

  That is, the length of the reinforcing part 23 becomes longer as it goes from the downstream side 11b to the upstream side 11c, and the dimension in the rotation direction 11a of the blade part 11 of the reinforcing part 23 in the wing part 13 is that the upstream side 11c is downstream. Smaller than the side 11b. Thereby, in the downstream side 11b, compared with the upstream side 11c, although the length of the reinforcement part 23 is short, since the dimension in the rotation direction 11a of the reinforcement part 23 is large, stress concentration is relieve | moderated more. On the other hand, on the upstream side 11c, since the stepped portion 14 extends obliquely downward from the root portion 12 as it goes from the downstream side 11b to the upstream side 11c, the upstream side 11c has a higher stress concentration than the downstream side 11b. It has been eased. Therefore, compared with the downstream side 11b, the length of the reinforcing portion 23 is longer on the upstream side 11c, but the size in the rotational direction 11a of the reinforcing portion is reduced, so that the stress concentration is further relaxed and the upstream side The balance of stress concentration between 11c and the downstream side 11b is improved.

  As a result, the stress concentration generated in the blade portion 11 can be dispersed, and the strength of the blade portion 11 can be further improved.

  The reinforcing portion 23 on the upstream side 11 c in the rotation direction 11 a of the blade portion 11 extends to the first recess portion 21. Temporarily, if the reinforcement part 23 and the 1st hollow part 21 are not connected, stress concentration will generate | occur | produce between the reinforcement part 23 and the 1st hollow part 21. FIG. Furthermore, the number of the reinforcement parts 23 between the 1st hollow part 21 and the level | step-difference part 14 which are the upstream 11c is the reinforcement part 23 between the 2nd hollow part 22 and the level | step-difference part 14 which are the downstream 11b. Therefore, it is considered that the stress concentration balance between the upstream side 11c and the downstream side 11b is lost. That is, the reinforcement part 23 on the upstream side 11c extends to the first depression part 21, and the reinforcement part 23 on the upstream side 11c and the first depression part 21 are connected, so that the upstream side 11c and the downstream side 11b are connected. It is thought that the balance of stress concentration is improved.

  The support portion 10 includes a plurality of fixing portions 17, and the root portion 12 of the blade portion 11 has a plurality of fixing hole portions 15 that are holes. The vane portion 11 is fixed to the lower surface of the support portion 10 by the connecting means 18 fixed to the fixing portion 17 through the fixing hole portion 15, and the fixing hole portion 15 is provided between the adjacent reinforcing portions 23. It has been done.

  Specifically, the fixing hole portion 15 on the upstream side 11c is between the first reinforcing portion 23a that is the most upstream side 11c and the second reinforcing portion 23b that is located next to the first reinforcing portion 23a. It is located in. The fixing hole portion 15 on the downstream side 11b is located between the third reinforcing portion 23c which is the most downstream side 11b and the fourth reinforcing portion 23d which is located next to the third reinforcing portion 23c. is there. Thereby, the stress concentration generated around the fixed hole portion 15 can be relaxed.

  The end portion 25 on the root portion 12 side in the blade portion 11 of the plurality of reinforcing portions 23 extends to the end portion on the motor portion 7 side of the blade portion 11.

  Thereby, the intensity | strength of the edge part by the side of the motor part 7 of the blade | wing part 11 improves, and the stress concentration which generate | occur | produces at the edge part by the side of the motor part 7 of the blade | wing part 11 can be relieved.

  According to the present invention, the connecting portion that can be engaged with the ceiling, the motor portion provided at the lower portion of the connecting portion, the supporting portion that is rotatably provided at the periphery of the motor portion, and the mounting portion can be attached to and detached from the supporting portion. A plurality of metal blade portions provided, the blade portion is fixed to the support portion, a blade portion that blows air by rotating the support portion, and the root portion The wing portion provided between the wing portions is integrally formed with a stepped portion that maintains an inclined state from the horizontal, and the wing portion is directed downward on the upstream side in the rotation direction of the wing portion. A recessed first recess, a second recessed recess recessed downward in the rotational direction of the blade portion, and extending from the root portion to the middle of the wing portion. A plurality of reinforcing portions having a shape, and the stepped portion extends from the downstream side toward the upstream side. Accordingly, the distance extending obliquely downward from the root portion increases, the first recess portion inclines downwardly from the downstream side toward the upstream side, and the second recess portion corresponds to the blade portion. The dimension from the downstream end to the upstream is such that the base side of the wing part is larger than the tip side, and the base side end part of the wing part of the second recess is directed from the downstream side to the upstream side. Accordingly, the dimension from the downstream end portion to the upstream side of the blade portion on the base side of the blade portion of the second recess portion is closer to the first recess portion. And the length of the reinforcing part becomes longer from the downstream side toward the upstream side, and the reinforcement at the wing part is larger than the dimension from the upstream end of the blade part to the downstream side. The size of the blade in the rotational direction of the blade is characterized in that the upstream side is smaller than the downstream side. It is intended to be one in which it is possible to further improve the strength of the blade part.

  The dimension from the downstream end of the blade portion to the upstream side on the base side of the wing portion of the second recess portion is from the upstream end portion of the blade portion to the downstream side in the first recess portion. Therefore, the stress concentration between the stepped portion, the first dent portion, and the second dent portion is larger on the downstream side than on the upstream side.

  Therefore, a plurality of reinforcing portions are provided in order to relieve stress concentration between the step portion, the first dent portion, and the second dent portion.

  That is, the length of the reinforcing portion becomes longer as it goes from the downstream side to the upstream side, and the size in the rotation direction of the blade portion of the reinforcing portion at the wing portion is smaller on the upstream side than on the downstream side. Thereby, although the length of a reinforcement part is short compared with the upstream side on the downstream side, since the dimension in the rotation direction of a reinforcement part is large, stress concentration is eased more. On the other hand, on the upstream side, the stepped portion has a distance extending obliquely downward from the root portion as it goes from the downstream side to the upstream side, so stress concentration is relaxed on the upstream side compared to the downstream side. Therefore, compared with the downstream side, the length of the reinforcing portion is longer on the upstream side, but by reducing the size of the reinforcing portion in the rotational direction, the stress concentration is further reduced, and the upstream side and the downstream side This improves the balance of stress concentration.

  As a result, it is possible to disperse the stress concentration generated in the blade portion and further improve the strength of the blade portion.

  Therefore, it is expected to be used as a ceiling fan for home use or office use.

DESCRIPTION OF SYMBOLS 1 Ceiling 2 Suspension part 3 Ceiling fan main body 4 Connection part 5 Joint part 6 Pipe part 7 Motor part 10 Support part 11 Blade | wing part 11a Rotating direction 11b Downstream side 11c Upstream side 12 Root part 13 Wing part 14 Step part 15 Fixed hole part 16 Main body cover portion 17 Fixing portion 18 Connecting means 19 Receiving portion 20 Motor lower cover 21 First recess portion 22 Second recess portion 23 Reinforcement portion 23a First reinforcement portion 23b Second reinforcement portion 23c Third reinforcement portion 23d 4th reinforcement part 24 edge part 25 edge part

Claims (4)

A connecting part that can be engaged with the ceiling, a motor part provided at the lower part of the connecting part, a support part that is rotatably provided at the periphery of the motor part, and a plurality of metal parts that are detachably provided on the support part The blade portion includes a root portion that is fixed to the support portion, a blade portion that blows air by rotation of the support portion, and a gap between the root portion and the blade portion. The wing portion is formed integrally with a step portion that maintains an inclined state from the horizontal, and the wing portion has a first dent recessed downward on the upstream side in the rotation direction of the wing portion. A plurality of reinforcements extending from the root part to the middle of the wing part and having a concave horizontal cross-sectional shape on the downstream side in the rotation direction of the blade part, the second depression part recessed downward And the stepped portion extends from the downstream side toward the upstream side. The first recess is inclined downward as it goes from the downstream side to the upstream side, and the second recess portion extends from the downstream end of the blade portion. The dimension toward the upstream side is such that the base side of the wing part is larger than the tip side, and the end part of the base part of the wing part of the second recessed part is located on the wing part as it goes from the downstream side toward the upstream side. The dimension from the downstream end portion to the upstream side of the blade portion on the base side of the wing portion of the second recess portion is located near the tip, and the size of the blade in the first recess portion Larger than the dimension from the upstream end of the part to the downstream side, the length of the reinforcing part becomes longer from the downstream side toward the upstream side, and the blade part of the reinforcing part at the wing part Ceiling fan characterized in that the dimension in the direction of rotation is smaller on the upstream side than on the downstream side . The ceiling fan according to claim 1, wherein the reinforcing portion on the upstream side in the rotation direction of the blade portion extends to the first recess portion. The support portion includes a plurality of fixing portions, and the root portion of the blade portion has a plurality of fixing hole portions that are holes, and is fixed to the fixing portion via the fixing hole portions. The ceiling fan according to claim 1 or 2, wherein the blade portion is fixed to a lower surface of the support portion by a connecting means, and the fixing hole portion is provided between the adjacent reinforcing portions. 4. The ceiling fan according to claim 1, wherein end portions of the blade portions of the plurality of reinforcing portions on the base portion side extend to end portions of the blade portions. 5.

Images