JP2015059509A - Attachment/detachment device for impeller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the vibration of a motor from being transmitted to an impeller by eliminating breakage and deformation of a buffer material to be attached to engaging pins.SOLUTION: A cylindrical buffer material 4 is attached to each of engaging pins 3 of a motor 1. This configuration ensures that an engaging projection 23 of a boss part 10 of an impeller 6 is brought into contact with the cylindrical buffer material 4 so as to rotate the cylindrical buffer material 4. Therefore, an attachment/detachment device for the impeller 6 capable of preventing the vibration of the motor 1 from being transmitted to the impeller 6 is obtainable by eliminating breakage and deformation of the cylindrical buffer material 4 to be attached to the engaging projection 23.

Description

  The present invention relates to an impeller attachment / detachment device that can easily attach / detach an impeller to a rotating shaft of an electric motor without using a spinner nut or the like.

  Conventionally, this kind of impeller attachment / detachment device includes a sheet-like cushioning material such as rubber between an engagement pin attached to a rotating shaft of an electric motor and a fitting recess of a boss portion of the impeller attached to the electric motor. The noise generated by the propagation of the vibration and the contact between the engaging pin and the insertion recess at the initial movement is prevented (for example, see Patent Document 1).

  The impeller attaching / detaching device will be described below with reference to FIGS.

  As shown in FIG. 5, a rotation-preventing engagement pin 103 is fixed to the base end portion of the rotating shaft 102 of the electric motor 101 in a direction orthogonal thereto, and a rubber or other buffer is attached to the engagement pin 103. A sheet 104 made of a material is provided, and an annular locking groove 105 is formed on the tip side.

  6 and 7, the impeller 106 is a sirocco fan provided with a boss portion 108 having a fitting hole 107 into which the rotating shaft 102 is inserted at the center portion. The boss portion 108 of the impeller 106 is formed with an engagement recess 109 that engages with the engagement pin 103 of the rotating shaft 102 and is movable in a direction perpendicular to the rotating shaft 102, and the urging force of the spring is used to A holding portion 110 that holds the impeller in a retaining state by being locked in the locking groove of the rotation shaft, and moves the holding portion 110 against the urging force of the spring to hold the holding portion 110 and the locking groove 105. And an escape operation section 111 for releasing the lock.

JP 2009-270550 A

  In such a conventional impeller attachment / detachment device, when the impeller is mounted on the electric motor, the engagement recess and the engagement recess are adjacent to each other even if the engagement recess and the engagement pin are not aligned. The engaging pin slides on the inclined part connecting the convex parts and fits into the engaging concave part. At this time, the buffer material is applied with a force in the direction opposite to the sliding direction of the engaging pin, and the buffer material Has a problem that the vibration of the electric motor propagates to the impeller by breaking or deforming.

  SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-described conventional problems, and the blade attaching / detaching device that can prevent the vibration of the motor from propagating to the impeller without breaking or deforming the cushioning material attached to the engaging pin. The purpose is to provide.

  In order to achieve this object, according to the present invention, the rotation shaft of the motor is provided with two opposing engagement pins for rotation prevention and an annular locking groove, and the insertion hole into which the rotation shaft is inserted is provided. The boss of the impeller has an engagement recess that engages with the engagement pin of the rotating shaft, and is movable in a direction orthogonal to the rotating shaft, and is moved into the locking groove of the rotating shaft by a biasing force of a spring. A holding portion that locks and holds the impeller in a retaining state, and a release operation that releases the locking between the holding portion and the locking groove by moving the holding portion against the biasing force of the spring. And a cylindrical cushioning material is attached to each of the detent engagement pins, thereby achieving the intended purpose.

  According to the present invention, the rotation shaft of the electric motor is provided with two opposing engagement pins for rotation prevention and an annular locking groove, and the boss portion of the impeller having the insertion hole into which the rotation shaft is inserted. An engagement recess that engages with the engagement pin of the rotating shaft, and a movable portion that is movable in a direction orthogonal to the rotating shaft, and is locked in the locking groove of the rotating shaft by a biasing force of a spring. A holding portion that holds the holding portion in a retaining state, and a release operation portion that moves the holding portion against the biasing force of the spring to release the locking between the holding portion and the locking groove. Since the cylindrical cushioning material is attached to each of the locking engagement pins, the cushioning material rotates even if a force is applied to the cushioning material in the direction opposite to the sliding direction of the engagement pin. As a result, the shock absorber attached to the engagement pin will not be broken or deformed, and the motor will vibrate. Can be prevented from being propagated to the impeller, the effect can be obtained as.

The perspective view which shows the electric motor of the attachment / detachment apparatus of the impeller of Embodiment 1 of this invention. Side structure diagram showing attachment state of impeller and electric motor of attachment / detachment device of same impeller Detailed perspective view of the boss portion of the impeller of the impeller attachment / detachment device Perspective view of essential parts of the impeller attaching / detaching device from above The perspective view which shows the electric motor of the attachment / detachment apparatus of the conventional impeller The perspective view from the lower part which shows the impeller of the attachment / detachment apparatus of the impeller Perspective view of essential parts of the impeller attaching / detaching device from above

  According to a first aspect of the present invention, there is provided an apparatus for attaching and detaching an impeller, wherein the rotating shaft of the electric motor is provided with two opposing engaging pins for rotation prevention and an annular locking groove, and the inserting shaft into which the rotating shaft is inserted. An boss portion of an impeller having an engagement recess that engages with the engagement pin of the rotation shaft, and a movable groove in a direction orthogonal to the rotation shaft, and a locking groove of the rotation shaft by a biasing force of a spring A holding portion that holds the impeller in a state of preventing the impeller from coming off, and a release that moves the holding portion against the urging force of the spring and releases the lock between the holding portion and the locking groove. An operation portion, and a cylindrical cushioning material is attached to each of the locking pins for rotation prevention. As a result, the boss portion of the impeller comes into contact with the cylindrical cushioning material and the cushioning material rotates, so that the vibration of the electric motor propagates to the impeller without breaking or deforming the cushioning material attached to the engagement pin. There is an effect that this can be prevented.

  Moreover, you may make it the structure of closing one side of one cylindrical shock absorbing material. This prevents liquid such as oil from entering the engagement portion between the engagement pin and the cylindrical cushioning material by closing one side of the cylindrical cushioning material. There is an effect that it is possible to prevent from being easily removed.

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

(Embodiment 1)
As shown in FIG. 1, a locking pin 3 is fixed to the base end portion 26 of the rotating shaft 2 of the electric motor 1 (motor) so as to penetrate in a direction orthogonal to the engaging pin 3. A rubber cylindrical cushioning material 4 is attached to each of the engagement pins 3, and an annular recess-shaped locking groove 5 is formed on the distal end 25 side of the rotating shaft 2.

  Further, the tip 25 of the rotating shaft 2 is formed with an inclined portion 2a whose tip is narrowed.

  As shown in FIG. 2 to FIG. 4, the impeller 6 attached to the rotating shaft 2 of the electric motor 1 has a plurality of blades 8 (48 in this case) standing upright on the outer periphery of a disk-shaped substrate 7 that is a main plate. The boss portion 10 having the insertion hole 9 formed with the inclined portion 9a formed with the inclined portion 9a having the inclined side 9a wider than the inclined portion 2a is formed in the center portion, and the outer periphery of the boss portion 10 is surrounded. For example, here is a sirocco fan in which a static pressure can be applied.

  The boss portion 10 of the impeller 6 is formed with a plurality of engagement recesses 12 with which the engagement pins 3 of the rotating shaft 2 are engaged (four in this embodiment due to space and the like), Two parallel guide ribs 14 are provided in the internal space 13 of the boss frame 11 surrounding the boss portion 10, and the holding portion 15 described later is slidable between the guide ribs 14 so as to be movable in a direction perpendicular to the insertion hole 9. Provided.

  The holding portion 15 has a substantially box shape with an open top surface, communicates with the insertion hole 9 on the bottom surface, a large-diameter circle 16a that is substantially the same diameter as the insertion hole 9, and a small-diameter circle 16b that is slightly larger in diameter than the locking groove 5. And a locking spring 17 that is biased so that the small-diameter circle 16b moves in the direction of the insertion hole 9 is provided on one side surface, and is opposed to the one side surface. On the other side, an escape operation part 19 connected by a support pin 18 is provided so as to be rotatable about the support pin 18 as a fulcrum. At the distal end side of the escape operation portion 19, when the small-diameter circle 16 b of the locking hole 16 is in a position that coincides with the insertion hole 9, the locking protrusion that abuts the outer peripheral surface of the boss frame 11 and prevents the holding portion 15 from moving. A portion 20 is provided, and an arcuate protrusion 21 that is in sliding contact with the other side surface formed in an arc shape is provided when the portion 20 is rotated. Further, the escape operation part 19 is provided with a lock spring 22 urged in a direction in which the lock projection 20 abuts the outer peripheral surface of the boss frame 11. When the escape operation part 19 is not operated, an automatic operation is performed. Therefore, the holding unit 15 is locked.

  When the rotary shaft 2 is inserted into the fitting hole 9 of the impeller 6 configured as described above, and further pushed in to fix the impeller 6 to the rotary shaft 2, the engaging convex portion 23 and the engaging pin of the boss portion 10 are fixed. When the cylindrical cushioning material 4 attached to 3 contacts and the cylindrical cushioning material 4 rotates, the inclined portion 24 connecting the engaging concave portion 12 and the engaging convex portion 23 adjacent to the engaging concave portion is engaged with the engaging pin. 3 slides and fits into the engaging recess 12, so that the impeller 6 is smoothly fixed to the rotating shaft 2. In this way, when the rotary shaft 2 is inserted into the insertion hole 9 of the impeller 6 and further pushed in to fix the impeller 6 to the rotary shaft 2, a cylindrical shape in which the engaging convex portion 23 is attached to the engaging pin 3. Preventing the vibration of the motor 1 from propagating to the impeller 6 without breaking or deforming the cylindrical cushioning material 4 by contacting and rotating the cylindrical cushioning material 4 when contacting the cushioning material 4 Can do.

  Moreover, it is set as the structure which closes the outer one side which is not the rotating shaft 2 side of each cylindrical shock absorbing material 4. FIG.

  Thereby, it is possible to prevent the liquid such as oil from entering the gap that is the fitting portion between the engagement pin 3 and the cylindrical cushioning material 4 from the outside, and the cylindrical cushioning material 4 due to the penetration of the liquid such as oil. Can be prevented from coming off easily.

  Since the impeller attachment / detachment device according to the present invention is capable of preventing the vibration of the motor from propagating to the impeller without breaking or deforming the cushioning material attached to the engagement pin, This is useful for an impeller attaching / detaching device that can be easily attached / detached without using a spinner nut or the like.

DESCRIPTION OF SYMBOLS 1 Electric motor 2 Rotating shaft 2a Inclination part 3 Engagement pin 4 Cylindrical shock absorbing material 5 Locking groove 6 Impeller 7 Substrate 8 Blade 9 Insertion hole 9a Inclination part 10 Boss part 11 Boss frame 12 Engagement recessed part 13 Internal space 14 Guide rib DESCRIPTION OF SYMBOLS 15 Holding | maintenance part 16 Locking hole 16a Large diameter circle 16b Small diameter circle 17 Locking spring 18 Support pin 19 Retraction operation part 20 Locking protrusion 21 Arc-shaped protrusion 22 Locking spring 23 Engaging convex part 24 Inclining part 25 Tip 26 Base end

Claims (2)

The rotating shaft of the electric motor is provided with two opposing engaging convex portions for preventing rotation and an annular locking groove, and the rotating shaft is mounted on the boss portion of the impeller having a fitting hole into which the rotating shaft is inserted. An engagement recess that engages with the engagement projection, and is movable in a direction perpendicular to the rotation shaft, and is locked in the engagement groove of the rotation shaft by a biasing force of a spring to prevent the impeller from coming off A holding portion that holds the state and a retraction operation portion that moves the holding portion against the urging force of the spring and releases the lock between the holding portion and the locking groove, An impeller attaching / detaching device characterized by attaching a cylindrical cushioning material to each engaging pin. The impeller attaching / detaching device according to claim 1 or 2, wherein one of the cylindrical cushioning members is closed.

Images