JP2013183500A - Vibrator holder and electric motor including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibrator holder which makes noise less likely to be transmitted and achieves good vibration proof characteristics.SOLUTION: Multiple non-penetrating cavity parts 3 are disposed along a circumferential direction of a holding part 2 inserted into a protruding part 11 provided in a vibrator (a motor 10) at predetermined intervals.

Description

  The present invention relates to a vibrating body holder for attaching a vibrating body such as an electric motor to a predetermined mounting site, and more specifically, relates to a vibrating body holder having a good vibration-proof characteristic that effectively absorbs vibration of the vibrating body. .

  For example, when a vibrating body such as an electric motor is directly fixed to the housing, vibration during driving is transmitted to the housing and becomes one of the causes of noise. Therefore, when attaching this type of vibrating body, a vibrating body holder having vibration isolation characteristics is interposed between the vibrating body and the housing.

  As an example of the vibrating body holder, Patent Documents 1 and 2 disclose that a vibration isolating device including a rubber cap having vibration isolating properties is attached to a bearing house protruding from both ends of a motor bracket.

  In Patent Document 1, a holding surface for holding a bearing house is cut out in a gear shape, thereby reducing a contact area and reducing vibration transmission. In Patent Document 2, a through-hole is provided in the axial direction, and air is allowed to flow there, whereby both reduction of vibration and suppression of temperature rise can be achieved.

  However, Patent Documents 1 and 2 have the following problems. That is, if the contact surface with the bearing house is cut out like a gear to reduce the contact area as in Patent Document 1, the motor body may idle with respect to the rubber cap due to the rotational moment generated when the motor is turned ON / OFF. . If the position of the motor is shifted, it is not preferable because a cable or the like may be pulled and disconnected.

  Moreover, since patent document 2 is a through-hole penetrated to the axial direction, there exists a possibility that the sound generated from the motor side may leak outside through a through-hole.

Japanese Utility Model Publication No. 54-159019 JP-A-6-327187

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vibrating body holder that is unlikely to generate noise and has good vibration isolation characteristics.

  In order to achieve the above-described object, the present invention has several features described below. That is, a vibrating body holder having a predetermined thickness and made of an elastic body formed in a plate shape, the holding being inserted into a convex portion provided on the vibrating body on one end surface side of the vibrating body holder And a plurality of gaps arranged at predetermined intervals along the circumferential direction of the holding part, and the gaps are formed of non-through holes with a predetermined depth.

  As a more preferred aspect, the partition wall between the gaps is formed so that its circumferential width gradually increases from the center toward the outside in the radial direction.

  As a more preferred aspect, the other end surface side of the vibrating body holder is provided with a locking projection for fixing the vibrating body holder to a predetermined attachment site.

  As a more preferred aspect, the holding part is a through-hole formed along the axial direction from one end to the other end of the vibrating body holder, and is a first cylinder that is locked along the outer peripheral surface of the convex part. A cylindrical surface and a second cylindrical surface having a smaller diameter than the first cylindrical surface are disposed along the axial direction, and between the first cylindrical surface and the second cylindrical surface, A step surface for supporting the tip of the convex portion is provided.

  As a more preferred embodiment, when the depth from the opening of the gap to the deepest part is L and the axial length of the first cylindrical surface is l, the gap has a depth L of the first. It is characterized by being formed so as to be larger than the axial length l of one cylindrical surface (L> l).

  The present invention is an electric motor including a bearing house in which a bearing that supports a rotating shaft is housed, the bearing house being provided so as to protrude in an axial direction of the rotating shaft, and along an outer periphery of the bearing house. An electric motor comprising the vibrating body holder according to any one of claims 1 to 5 is also included.

  According to the first aspect of the present invention, the vibrating body holder is made of an elastic body having a predetermined thickness and formed in a plate shape, and is provided on the vibrating body on one end surface side of the vibrating body holder. A holding portion inserted into the convex portion and a plurality of gap portions arranged at predetermined intervals along the circumferential direction of the holding portion, and the gap portion is formed of a non-through hole having a predetermined depth. Thus, both noise characteristics and vibration isolation characteristics can be achieved.

  According to the second invention, the partition wall between the gaps is formed such that the circumferential width gradually increases from the center toward the outside in the radial direction, so that the center side is soft. Further, the rigidity increases toward the outside, and not only can the idling of the motor body due to the rotational moment generated when the motor is turned on / off be prevented, but also the vibration-proof characteristic is good.

  According to the third aspect of the invention, the other end surface of the vibrating body holder is provided with a locking projection for fixing the vibrating body holder to a predetermined attachment site. The vibrating body can be firmly fixed to the attachment site without deteriorating the characteristics.

  According to the fourth invention, the holding portion is a through hole formed along the axial direction from one end to the other end of the vibrating body holder, and is locked along the outer peripheral surface of the convex portion. A first cylindrical surface and a second cylindrical surface having a smaller diameter than the first cylindrical surface are disposed along the axial direction, and are between the first cylindrical surface and the second cylindrical surface. Since the step surface for supporting the tip of the convex portion is provided, the movement of the vibrating body can be more reliably restrained.

  According to the fifth invention, when the depth from the opening to the deepest portion of the gap is L and the axial length of the first cylindrical surface is l, the gap is the depth L. Is larger than the axial length l of the first cylindrical surface (L> l), the entire vibrating body holder is easily deformed, and the vibration isolation performance is improved. In addition, the grip force on the mounted surface is also improved.

  According to the sixth aspect of the invention, by attaching the vibrating body holder along the outer periphery of the bearing house protruding from the outer peripheral surface of the bracket, the idling of the motor body due to the rotational moment generated when the motor is turned ON / OFF is ensured. Can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS (a) Front view of the vibrating body holder which concerns on one Embodiment of this invention, (b) Rear view, (c) Side view, and (d) AA sectional view. The partial enlarged front view of the said vibrating body holder. The partial expanded sectional view of the said vibrating body holder. The disassembled perspective view of the state which attached the said vibrating body holder to the vibrating body (motor). (A) Sectional drawing of the state which attached the said vibrating body holder to the vibrating body (motor), (b) The partial expanded sectional view of the state which attached the said vibrating body holder to the vibrating body (motor).

  Next, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.

  As shown in FIG. 1, the vibrating body holder 1 is made of an elastic body having vibration-proof characteristics such as vibration-proof rubber, and in this example, the whole is formed in a disk shape. Vulcanized rubber is used as the anti-vibration rubber in the present embodiment, but any material having anti-vibration characteristics may be selected according to the specifications.

  As shown in FIG. 1 (a), on one end surface of the vibrating body holder 1, a holding part 2 attached to a bearing house 11 of an electric motor 10 described later at the center, and a holding part 2 centering on the holding part 2. And a plurality of gaps 3 arranged concentrically with a predetermined interval.

  Referring also to FIG. 1 (d), the holding part 2 is composed of a cylindrical through hole that penetrates the vibrating body holder 1 along the axial direction (the horizontal direction in FIG. 1 (d)). The holding part 2 has a first cylindrical surface 21 having substantially the same diameter as the outer diameter of the bearing house 11 and a second cylindrical surface 22 having a smaller diameter than the first cylindrical surface 21, and the first cylindrical surface A second cylindrical surface 22 is disposed on the same axis on one end side of 21 (the right end in FIG. 1D).

  Between the first cylindrical surface 21 and the second cylindrical surface 22, a step surface 23 that supports the tip surface 11 a of the bearing house 11 is formed. The step surface 23 is a vertical surface orthogonal to the axial direction of the holding portion 2 and is an annular surface formed on the boundary between the first cylindrical surface 21 and the second cylindrical surface 22.

  As shown in FIG. 1A, the gap 3 is a cutout groove having a rectangular cross section, and in this example, 16 gaps are provided at intervals of 22.5 ° around the central axis. Each gap 3 has the same shape, and as shown in FIG. 1 (d), its bottom 31 is curved in an R shape in order to keep the thickness from the other end of the vibrating body holder 1 constant to some extent. Yes.

  In this example, the gap 3 is formed in a rectangular cross section, but may be a rectangle including a square, a trapezoidal shape, a round shape, or the like, and the shape is arbitrary depending on the specification. May be changed to Further, the number and interval may be arbitrarily selected.

  A partition wall 4 is disposed between the gaps 3, and the partition wall 4 is formed such that its circumferential width (thickness) T gradually increases from the center toward the outside in the radial direction. Has been. In other words, in this example, when the innermost diameter side is T1 and the outermost diameter side width is T2, T1 <T2.

  According to this, since the inner diameter side width T1 is formed thinner than the outer diameter side width T2, the inner diameter side is easily deformed in the circumferential direction, that is, becomes flexible, and the outer diameter side has higher rigidity. Therefore, when the motor is attached as the vibrating body, the force acting in the circumferential direction due to the rotational moment generated when the motor is turned on and off can be effectively absorbed, and the vibration can be more effectively attenuated.

  With reference to FIG. 1 and FIG. 3, on the other end side (right end side in FIG. 1 (c)) of the vibrating body holder 1, a locking projection for attaching the vibrating body holder 1 to a predetermined attachment site 5 is provided. The locking projection 5 has a columnar shape that is coaxially projected from the other end of the vibrating body holder 1, and has an outer diameter that is smaller than the outer diameter of the vibrating body holder 1.

  The locking projection 5 is formed to protrude from the other end side of the vibrating body holder 1 by a height H in the axial direction. In this example, the height H is provided to ensure a predetermined thickness from the bottom 31 of the gap 3, and specifically H = 2.0 mm.

  According to this, the latching convex portion 5 is formed so as to project a predetermined height along the axial direction, so that it is not easily affected by the gap portion 3, and the other portion of the vibrating body holder 1. Since the rigidity is kept relatively high compared to the part, it is possible to perform more stable attachment by fixing the vibrating body holder 1 to a predetermined attachment part by using the locking projection 5. it can.

  Further, when the depth from the opening of the gap 3 to the deepest part is L and the axial length of the first cylindrical surface 21 is l, the gap 3 has a depth L of the first cylindrical surface. It is formed to be larger than the axial length l of 21 (L> l).

  According to this, the first and second cylindrical surfaces 21 and 22 are easily deformed in the radial direction. Therefore, by strongly pressing the locking projection 5 toward the inner diameter side, the first and second cylindrical surfaces 21 and 22 are in close contact with the bearing house 11, while preventing the motor 10 from slipping, It is difficult to transmit vibration to the housing side described later.

  Next, an example of the attachment mode of the vibrating body holder 1 according to the present invention will be described with reference to the drawings. In this example, a description will be given as an example using the electric motor 10 as a vibrating body.

  As shown in FIG. 4 and FIG. 5, the vibrating body holder 1 has the holding portions 2 inserted and attached along bearing houses 11 provided at both ends of the bracket of the electric motor 10 in the axial direction. The bearing house 11 is a space in which a bearing (not shown) that supports the rotating shaft 12 of the electric motor 10 is accommodated, and is provided so as to protrude from both ends of the electric motor 10 in the axial direction.

  The first cylindrical surface 21 of the holding portion 2 of the vibrating body holder 1 is inserted along the bearing house 11, and the tip 11 a of the bearing house 11 is brought into contact with the step surface 23. Next, as shown in FIG. 4, the electric motor 10 having the vibrating body holder 1 attached thereto is installed on a mounting base 6 provided in a housing (not shown).

  The mounting base 6 includes a base 61 that is integrally attached to the housing side, and a pressing plate 62 that is detachably attached to the base 61. The base 61 and the pressing plate 62 hold the vibrating body holder 1. It is designed to be sandwiched and supported.

  Both the base 61 and the holding plate 62 are provided with a first support surface 63 that supports the outer peripheral surface of the vibrating body holder 1 and a second support surface 64 that supports the outer peripheral surface of the locking projection 5. A step surface 65 is provided between the support surface 63 and the second support surface 64.

  The first support surface 63 is a semicircular arc surface corresponding to about a half circumference of the outer peripheral surface of the vibrating body holder 1, and the first support surfaces 63 of the base 61 and the pressing plate 62 are arranged facing each other. As a result, a large-diameter cylindrical surface that supports the outer peripheral surface of the vibrating body holder 1 is formed.

  Similarly, the second support surface 64 is a semicircular arc surface formed approximately half the circumference of the outer peripheral surface of the locking projection 5 or less, and each of the second support surfaces 64 of the base 61 and the holding plate 62 is connected to each other. By being arranged so as to face each other, a small-diameter cylindrical surface that supports the outer peripheral surface of the locking projection 5 is formed.

  In this example, the second support surface 64 is formed to be slightly shorter than the half circumference of the outer peripheral surface of the locking projection 5, and the second support surface 64 comes into close contact with the locking projection 5. Yes. Thereby, the vibrating body holder 1 is firmly held on the support base 6 by the locking projection 5 and the second support surface 65.

  In this example, the vibration body has been described by taking the electric motor 10 as an example, but the vibration body is not particularly limited as long as it can be a vibration generation source. In addition to the vibrating body, the vibrating body holder 1 of the present invention may be used for the purpose of blocking external vibration.

DESCRIPTION OF SYMBOLS 1 Vibrating body holder 2 Holding part 21 1st cylindrical surface 22 2nd cylindrical surface 23 Step surface 3 Cavity part 4 Partition wall 5 Locking convex part 6 Mounting base

Claims (6)

  A vibrating body holder having a predetermined thickness and made of an elastic body formed in a plate shape, and a holding section inserted into a convex portion provided on the vibrating body on one end surface side of the vibrating body holder And a plurality of gaps arranged at predetermined intervals along the circumferential direction of the holding part, and the gap part is formed of a non-through hole with a predetermined depth. .   The partition wall between the gaps is formed so that its circumferential width gradually increases from the center toward the outside in the radial direction.   The locking projection for fixing the vibrating body holder to a predetermined attachment site is provided on the other end surface side of the vibrating body holder. Vibrating body holder.   The holding portion is a through-hole formed along the axial direction from one end to the other end of the vibrating body holder, and includes a first cylindrical surface that supports an outer peripheral surface of the convex portion, and the first cylinder A second cylindrical surface having a smaller diameter than the cylindrical surface is disposed along the axial direction, and supports the tip of the convex portion between the first cylindrical surface and the second cylindrical surface. The vibrating body holder according to claim 1, wherein a step surface is provided.   When the depth from the opening of the gap to the deepest part is L and the axial length of the first cylindrical surface is l, the gap has a depth L of the first cylindrical surface. The vibrating body holder according to claim 4, wherein the vibrating body holder is formed so as to be larger than an axial length l (L> l).   An electric motor comprising a bearing house in which a bearing for supporting a rotating shaft is housed, wherein the bearing house is provided so as to protrude in an axial direction of the rotating shaft, and is along the outer periphery of the bearing house. An electric motor comprising the vibrating body holder described in any one of 1 to 5.

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