JP2021036769A - Rotary device - Google Patents

Abstract

To provide a rotary device improving quietness.SOLUTION: A rotary device includes a motor, multiple gears including an output gear for outputting rotation of the motor to the outside, and an enclosure for housing the multiple gears and the motor. The enclosure includes a first surface, a second surface facing the first surface, and provided separately therefrom, and a sidewall provided on the periphery of the first and second surfaces, and supporting the first and second surfaces while spaced apart from each other. On the surface of at least one of the first and second surfaces, a vibration attenuation part is located on the inside of the output gear. The vibration attenuation part is a projection projecting from the surface, and the projection is constituted of multiple protrusions, the output gear has a recess facing the surface, a part of the projection is housed in the recess of the output gear, and a specific crevice is provided between the facing recess and projection.SELECTED DRAWING: Figure 3

Description

The present invention relates to a rotating device.

For example, Patent Document 1 discloses a motor actuator (rotating device) that drives a plurality of doors (louvers) provided in the middle of an air passage through which air flows in a vehicle air conditioning system.

Japanese Unexamined Patent Publication No. 2015-220996

Suppress the noise generated by the housing.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a rotating device having improved quietness.

The present invention is grasped by the following configuration in order to achieve the above object.
(1) The rotating device of the present invention includes a motor, a plurality of gears for outputting the rotation of the motor to the outside, and a housing for accommodating the plurality of the gears and the motor. A first surface portion and a second surface portion facing the first surface portion and provided apart from the first surface portion are provided, and at least one surface portion of the first surface portion or the second surface portion has a first surface portion. There is a vibration damping part and a second vibration damping part, and the first vibration damping part faces a gear having a size larger than the other gears among the plurality of gears, and the first vibration damping part is It is a protruding portion provided so as to project from at least one of the surface portions, the second vibration damping portion is closer to the outer peripheral portion with respect to the first vibration damping portion, and the second vibration damping portion is , The mounting member attached to the at least one surface portion is provided.

(2) In the configuration of the above (1), a rod-shaped protrusion is provided on the at least one surface portion, and the mounting member is attached to the at least one surface portion via the rod-shaped protrusion.

(3) In the configuration of (1) or (2) above, a third vibration damping portion is provided, and the third vibration damping portion is screwed into a screw hole formed in at least one of the surface portions. Equipped with attached screws.

(4) In the configuration of (2) above, a plurality of rod-shaped protrusions including the rod-shaped protrusions are provided on at least one of the surface portions.

(5) In the configuration of (3) above, a plurality of screw holes including the screw holes are formed on at least one of the surface portions, and a plurality of screws including the screws are respectively formed in the plurality of screw holes. It is screwed and attached.

According to the present invention, it is possible to provide a rotating device having improved quietness.

It is a figure of the rotating apparatus of 1st Embodiment which concerns on this invention, (a) is the perspective view which looked at the 1st surface side of a housing, (b) is the perspective view which looked at the 2nd surface side of a housing It is a figure. It is a perspective view which removed the 1st housing of the rotating apparatus of 1st Embodiment which concerns on this invention. It is an exploded perspective view of the rotating apparatus of 1st Embodiment which concerns on this invention. It is a perspective view which looked at the inside of the 1st housing of 1st Embodiment which concerns on this invention. It is a figure for demonstrating the 2nd Embodiment which concerns on this invention, (a) is the perspective view which looked at the inside of 1st housing, (b) is the 1st vibration damping part of 1st Embodiment. It is a perspective view which shows the attachment member which comprises the vibration damping part of the 2nd Embodiment changed to, and (c) is the perspective view which shows the state which a plurality of attachment members are attached to the 1st housing. It is a schematic diagram for demonstrating the air-conditioning system provided with the rotating apparatus of embodiment which concerns on this invention. It is a figure which shows the vehicle equipped with the air-conditioning system of FIG.

Hereinafter, embodiments for carrying out the present invention (hereinafter, referred to as “embodiments”) will be described in detail with reference to the accompanying drawings.
The same elements are numbered the same throughout the description of the embodiment.

(First Embodiment)
1A and 1B are views of the rotating device 10 according to the embodiment of the present invention, FIG. 1A is a perspective view of the first surface portion 21 side of the housing 20, and FIG. 1B is a second surface portion of the housing 20. It is a perspective view which looked at the 25 side.
FIG. 2 is a perspective view of the rotating device 10 from which the first housing 23 is removed, and FIG. 3 is an exploded perspective view of the rotating device 10.

As shown in FIG. 1, the rotating device 10 has a first surface portion 21 as a surface portion, a second surface portion 25 as a surface portion facing the first surface portion 21 and provided apart from the first surface portion 21, and a second surface portion 25. It is provided on the outer peripheral portion of the first surface portion 21 and the second surface portion 25, and includes a side wall portion 24 that connects or supports the first surface portion 21 and the second surface portion 25 at a distance from each other.

Specifically, as shown in FIG. 2, the housing 20 is a first side wall that constitutes a part of a side wall portion 24 (see FIG. 1) provided on the outer peripheral portion of the first surface portion 21 and the first surface portion 21. A second housing 23 having a first housing 23 having a portion 22 and a second side wall portion 26 having a second side wall portion 26 forming a part of a side wall portion 24 (see FIG. 1) provided on the outer peripheral portions of the second surface portion 25 and the second surface portion 25. It is configured by combining with the housing 27.
The housing 20 is made of a resin material such as polypropylene, polyethylene terephthalate, and ABS.

Then, as shown in FIGS. 2 and 3, the rotating device 10 mechanically outputs the motor 30 and the rotation of the motor 30 to the outside as various parts housed in the housing 20 (see FIG. 1). It is provided with a plurality of gears 60 including an output gear 50 to be used.

Further, as shown in FIGS. 2 and 3, the rotating device 10 includes a sensor 70 for detecting the rotation angle of the output gear 50 and a sensor 70 as various parts housed in the housing 20 (see FIG. 1). Three first connection terminals 72 for obtaining a rotation angle signal according to the rotation angle provided on the base portion 71 of the sensor 70, and two electrically connected to the motor 30 provided on the base portion 71 of the sensor 70. It includes two second connection terminals 35, and a flexible wiring board 80 (see FIG. 3) that electrically connects the two motor terminals (not shown) of the motor 30 to the second connection terminal 35.

(motor)
The motor 30 is a drive device for rotating the output gear 50, and a DC motor is used in this embodiment.
As shown in FIG. 3, the motor 30 is led out from a main body portion 31 having a square columnar outer shape with curved corners and a first end surface 31a of the main body portion 31, and a rotating shaft (shown) to which a worm gear 41 is fixed. And a pair of motor terminals for power supply (shown) that are located on the opposite side of the first end surface 31a of the main body 31 and are provided so as to project outward from the second end surface 31b facing the first end surface 31a. It is equipped with.
A rotating shaft is fixed to the rotor.

(Transmission gear)
As shown in FIGS. 2 and 3, the plurality of gears 60 include a transmission gear 40, and the transmission gear 40 rotates the rotation shaft (not shown) of the motor 30 at a predetermined gear ratio. It is a gear for transmitting to the output gear 50, and in this embodiment, three gears (worm gear 41, first second gear 42, and second second gear 43) are used as the transmission gear 40.

Specifically, as shown in FIG. 2, the transmission gear 40 includes a worm gear 41 fixed to a rotating shaft (not shown) of the motor 30, a large-diameter gear 42a connected to the worm gear 41, and a small-diameter gear 42a. The first two-stage gear 42 having the gear 42b, the large-diameter gear 43a connected to the small-diameter gear 42b in the first two-stage gear 42, and the small-diameter gear 43b connected to the output gear 50 (see FIG. 3). ), And a second two-stage gear 43.

In the present embodiment, the first and second gears 42 and the first and second gears 42 and the second gear so as to transmit the rotation of the rotation shaft (not shown) of the motor 30 to the output gear 50 while adjusting the gear ratio using a small space. 2 The two-stage gear 43 is used, but for example, the second two-stage gear 43 may be omitted and the output gear 50 may be connected to the gear 42b having a small diameter of the first two-stage gear 42. The output gear 50 may be directly connected to the worm gear 41 by omitting the step gear 42 and the second second gear 43.

(Output gear)
The output gear 50 is connected to the drive shaft of the louver of the air conditioning system of a vehicle such as an automobile (not shown), and outputs the rotation of the rotation shaft (not shown) of the motor 30 as a driving force for controlling the drive shaft of the louver. Gear.

Therefore, as shown in FIG. 3, the second surface portion 25 of the second housing 27 is provided with an opening 25a for accessing the output gear 50 from the outside in a portion corresponding to the center side of the output gear 50. As shown in FIG. 1B, a drive shaft of a louver (not shown) can be connected to the engaging portion 51 of the output gear 50 through the opening 25a.

The output gear 50 is not limited to the mode in which the drive shaft of the louver (not shown) is directly connected, and a gear interposed between the rotating device 10 and the drive shaft of the louver (not shown) may be provided. , The rotating shaft of the intervening gear is connected to the output gear 50.

(sensor)
For example, air conditioners installed in automobiles are equipped with louvers.
In order to drive and control the louver (not shown) in a predetermined state, it is necessary to control the rotation angle of the output gear 50, and the sensor 70 controls the rotation angle of the output gear 50 in order to control the rotation angle of the output gear 50. It is a sensor for detecting the rotation angle.

Then, by controlling the rotation of the motor 30 based on the rotation angle of the output gear 50 detected by the sensor 70, the output gear 50 is rotated so that the louver (not shown) is in a predetermined state.

In the present embodiment, a rotary type resistance type position sensor is used for the sensor 70, and as shown in FIGS. 2 and 3, the sensor 70 is used to obtain a rotation angle signal corresponding to the rotation angle of the output gear 50. It has three first connection terminals 72 for input and output, a sensor substrate 73 on which a resistor to which the first connection terminal 72 is electrically connected is printed, and a conductive brush (not shown) that contacts the resistor. A rotating body (not shown) that rotates integrally with the output gear 50 that detects the rotation angle, a base portion 71 for arranging them, and a base portion 71 provided at a position corresponding to the rotating body (not shown). It includes a covering portion 74 that forms a sensor housing.

Then, in addition to the three first connection terminals 72 for the sensor 70 for obtaining the rotation angle signal, the base portion 71 further has a flexible wiring board for each of the two motor terminals (not shown) of the motor 30. Two second connection terminals 35, which are electrically connected via 80 (see FIG. 3), are also arranged and fixed.

By consolidating the first connection terminal 72 and the second connection terminal 35 on the base portion 71 of the sensor 70 and arranging and fixing them in this way, the space can be effectively used and the rotating device 10 can be miniaturized.

Further, by arranging the first connection terminal 72 and the second connection terminal 35 on the base portion 71, the first connection terminal 72 and the second connection are connected to other parts housed in the housing 20 (see FIG. 1). It is possible to avoid contact with the terminal 35, and the reliability can be further improved.

Further, since the base portion 71 is simple in shape, even if a structure for arranging and fixing the first connection terminal 72 and the second connection terminal 35 is provided, the cost of a mold or the like for molding the base portion 71 is required. Will not be high.

On the other hand, since the housing 20 is formed with a structure for arranging various parts, if a structure for arranging and fixing the first connection terminal 72 and the second connection terminal 35 is further provided, the housing 20 is provided. Since the mold or the like for molding (the first housing 23 or the second housing 27) becomes complicated and the cost of the mold or the like increases, the manufacturing cost of the housing 20 increases.

Therefore, as in the present embodiment, it is possible to reduce the manufacturing cost by allowing the first connection terminal 72 and the second connection terminal 35 to be arranged and fixed to the base portion 71 of the sensor 70.

Further, in the present embodiment, as shown in FIG. 2, the second connection terminal 35 is arranged on the base portion 71 so as to be located on the motor 30 side of the first connection terminal 72. 2 The wiring distance between the connection terminal 35 and the motor terminal (not shown) of the motor 30 can be shortened, and the electrical wiring between the second connection terminal 35 and the motor terminal (not shown) of the motor 30 can be made compact. Can be.

(1st connection terminal and 2nd connection terminal)
The first connection terminal 72 and the second connection terminal 35 are connection terminals connected to an external connector connected to the rotating device 10.
The three first connection terminals 72 are electrically connected to a conductive portion (not shown) of the sensor board 73 for detecting the rotation angle of the output gear 50, and the two second connection terminals 35 are flexible wiring boards described later. It is electrically connected to two motor terminals (not shown) which are power terminals of the motor 30 via 80.

Then, as shown in FIGS. 2 and 3, the second connection terminal 35 is a bent portion in which one end side opposite to the tip end side connected to the external connector is bent in a direction away from the base portion 71, and the base is formed. It has a connecting portion 35a extending in a direction away from the portion 71, and by providing such a connecting portion 35a, the reliability of the electrical connection with the flexible wiring board 80 is improved, as will be described later. Can be made to.

(Flexible wiring board)
As shown in FIG. 3, the flexible wiring board 80 is roughly divided into three surfaces, specifically, a first surface portion 81 on one end side connected to the second connection terminal 35, and a motor 30. A second surface portion 82 on the other end side connected to the motor terminal (not shown) of the above, and an intermediate surface portion 83 connecting the first surface portion 81 and the second surface portion 82 are provided.

The first surface portion 81 is formed with two first engagement holes 81a that engage with each other at the connection portions 35a of the two second connection terminals 35, and the second surface portion 82 is formed with the motor 30. Two second engagement holes 82a are formed to engage with each of the pair of motor terminals (not shown).

Therefore, by soldering the connection portions 35a of the two second connection terminals 35 by engaging the two first engagement holes 81a of the first surface portion 81, a firm electrical connection can be obtained. Therefore, poor connection can be suppressed.
Similarly, by engaging the second engaging hole 82a of the second surface portion 82 with the pair of motor terminals (not shown) of the motor 30, soldering is performed to ensure firm electricity. Since the connection can be made, poor connection can be suppressed.

It is also possible to connect the second connection terminal 35 and the motor terminal (not shown) of the motor 30 with a lead wire.
The flexible wiring board is preferable in that it is easier to handle than the lead wire and is less likely to be damaged, so that the connection workability is better.
On the other hand, if the flexible wiring board 80 is used as in the present embodiment, the wiring workability is improved, so that the manufacturing cost can be reduced.

Further, in the present embodiment, as shown in FIG. 3, the first surface portion 81 and the second surface portion 82 are substantially orthogonal to the intermediate surface portion 83 connecting the first surface portion 81 and the second surface portion 82 of the flexible wiring board 80. A bent portion 83a is provided so as to be arranged so as to do so.
The bent portion 83a also has a shape provided with a folded structure.

For example, if the second connection terminal 35 and the motor terminal (not shown) of the motor 30 are linearly connected by the flexible wiring board 80, the motor 30 and the second connection terminal 35 vibrate due to the vibration of the vehicle. , The connection portion between the flexible wiring board 80 and the second connection terminal 35 and the connection portion between the motor terminal (not shown) and the flexible wiring board 80 are likely to be subjected to tensile stress or the like, resulting in poor connection or flexible wiring. The substrate 80 is likely to be disconnected.

Therefore, in the present embodiment, the angle (bending angle) formed by the first surface portion 81 and the second surface portion 82 in response to vibration or the like on the way from the second connection terminal 35 to the motor terminal (not shown) of the motor 30. ) Is changed and a bent portion 83a provided with a folded structure showing springiness is interposed.

In this way, the bent portion 83a provided with the folded structure is deformed so that the bent angle changes in response to vibration or the like and exhibits springiness. Therefore, the second connection terminal 35 and the flexible wiring board 80 It is possible to prevent tensile stress and the like from being applied to the connection portion of the motor terminal (not shown) and the connection portion between the motor terminal (not shown) and the flexible wiring board 80. Etc. can be suppressed.

However, even if the bent portion 83a is configured by only one bending without a folded structure, a portion having an extra length can be formed as compared with the case of linear wiring, and the influence of tensile stress and the like can be obtained. May be used as such a bent portion because it can reduce the number of parts.
On the other hand, as in the present embodiment, it is preferable to use the bent portion 83a provided with the folded structure because the bent portion 83a having the folded structure can be made less susceptible to the influence of tensile stress and the like. is there.

Therefore, the reliability of the rotating device 10 can be improved by providing the flexible wiring board 80 with a bent portion 83a having a folded structure as in the present embodiment.

As in the present embodiment, assuming that the intermediate surface portion 83 is provided with the bent portion 83a having the folded structure, as can be seen from FIG. 2, the conductive pattern formed on the flexible wiring board 80 is provided. Is provided on the side where the connection portion 35a protrudes when the connection portion 35a of the second connection terminal 35 is passed through the first engagement hole 81a, and the motor terminal (see FIG. 3) is provided in the second engagement hole 82a (see FIG. 3). Since the motor terminal (not shown) is provided on the protruding side when it is passed through (not shown), there is also an effect that workability at the time of soldering is improved.

(Case)
As described above, the housing 20 is configured so that the first housing 23 and the second housing 27 are combined.
Then, when the noise state of each part of the housing 20 was examined, the vibration at the positions of the first surface portion 21 and the second surface portion 25 corresponding to the output gear 50 was larger than the other parts and caused the noise. I found that.

At the positions of the first surface portion 21 and the second surface portion 25 facing the output gear 50, since the output gear 50 having a large size that cannot be contacted with other members is arranged, there is no structure for suppressing vibration. , It is considered that the position is such that vibration leading to noise is likely to occur.

Therefore, by providing a plurality of vibration damping portions 90 at the positions of the first surface portion 21 and the second surface portion 25 corresponding to the output gear 50 so as not to hinder the rotation of the output gear 50, the noise generated by the housing 20 can be generated. The vibration damping unit 90 will be specifically described below.

FIG. 4 is a perspective view of the inside of the first housing 23.
In FIG. 4, the region where the output gear 50 is located is schematically shown by the dotted line frame B.

(First vibration damping part)
As shown in FIG. 4, at a position corresponding to the output gear 50 (around the dotted line frame B) of the first surface portion 21 which is one surface portion of the housing 20 (see FIG. 1), the first surface portion which is one surface portion. A first vibration damping portion 90 is provided as a protruding portion formed by projecting from 21 to the inside of the housing 20 and composed of a plurality of convex portions 91 cantilevered on the first surface portion 21.
The plurality of convex portions 91 are arranged side by side in the direction of the rotation axis of the motor 30 or in the direction intersecting the rotation axis.
In the thickness direction of the housing 20, the convex portion 91 is formed longer than the rib 96 formed on the housing 20, and is formed in a rod-shaped outer shape.
A plurality of ribs extending in the direction of the rotation axis of the motor 30 or in the direction intersecting the rotation axis are formed on the inner surface of the first surface portion 21 facing the second surface portion 25.

In this way, by providing the protruding portion composed of the plurality of convex portions 91 on the first surface portion 21 of the housing 20, the housing 20 (see FIG. 1) corresponding to the output gear 50 (around the dotted line frame B) The weight of a part of the first surface portion 21 which is one surface portion is increased.
Therefore, even if the first surface portion 21 of the housing 20 vibrates, the amplitude of the vibration is rapidly attenuated with the passage of time, so that the generation of noise emitted from the housing 20 can be suppressed, or other than the first surface portion 21. It is possible to suppress the occurrence of resonance with vibration in other parts of the housing 20 and reduce noise.

The protruding portion composed of the plurality of convex portions 91 is located inside the output gear 50, as can be seen from the dotted line frame B.
Therefore, as shown in FIGS. 2 and 3, the output gear 50 is formed with a recess 52 on the surface facing the first surface portion 21.
The recess 52 avoids contact with a protrusion composed of a plurality of protrusions 91 and accommodates the protrusion.
The protruding portion composed of the plurality of convex portions 91 protrudes from the first surface portion 21 so that a part of the protruding portion composed of the plurality of convex portions 91 is located in the concave portion 52 on the tip end side. It is formed.
A predetermined gap is provided between the concave portion 52 and the protruding portion, so that the concave portion 52 has a concave shape and the gap is provided to prevent the concave portion 52 and the protruding portion from coming into contact with each other. ing.

It is also possible to form the protruding portions as one convex portion in which they are integrally connected instead of forming the plurality of convex portions 91.
Since the protruding portion, which is one convex portion connected integrally, is likely to be deformed during molding of the housing 20 (more specifically, the first housing 23), as in the present embodiment. , More specifically, when it is integrally formed with the housing 20 (more specifically, the first housing 23), it is preferable to provide the protruding portions as a plurality of convex portions 91.

(Second vibration damping part)
In the present embodiment, in addition to the first vibration damping section 90 described above, a second vibration damping section 90 is also provided in the vicinity of the first vibration damping section 90.

Specifically, as shown in FIG. 4, the housing 20 (is located near the first side wall portion 22 close to the first vibration damping portion 90 having the protruding portion composed of the plurality of convex portions 91. A plurality of screw holes 21a formed in the first surface portion 21 which is one surface portion (see FIG. 1) are formed.
The plurality of metal screws 92 screwed into the screw holes 21a are mounting members attached to the first surface portion 21 of the housing 20.
A second vibration damping portion 90 composed of the mounting member is provided on the first surface portion 21 of the housing 20.
The plurality of screw holes 21a and screws 92 are provided on the inner surface or the outer surface of the surface portion.
Here, the inner surface means a surface facing the inside of the housing 20, and the outer surface means a surface facing the outside of the housing 20.
The screw 92 is made of a metal material such as iron or aluminum.

Since the second vibration damping portion 90 composed of the plurality of metal screws 92 attached in this way has a larger unit mass as a material than the housing 20 made of a resin material, the weight is increased. Therefore, the noise is reduced in the same manner as the first vibration damping unit 90 described above.

In the above description, the case where the first vibration damping portion 90 is a protruding portion composed of a plurality of convex portions 91 formed by projecting from the first surface portion 21 which is one of the surface portions to the inside of the housing 20 is shown. However, similarly to the second vibration damping portion 90, a plurality of convex portions 91 may be provided by screw connection, and the first vibration damping portion 90 may also be configured as a mounting member.
Further, the first surface portion 21 is provided with the first vibration damping portion 90 and the second vibration damping portion 90, but the second surface portion 25 is provided with the first vibration damping portion 90 and the second vibration damping portion 90. The first and second vibration damping portions 90 may be provided on both the first and second surface portions.

In this way, by configuring the vibration damping portion 90 as the mounting member, the selection range of the material can be expanded, so that the size of the vibration damping portion 90 for obtaining the required weight can be kept small. At the same time, it is possible to suppress the noise while checking the noise situation and omitting some mounting members to minimize the increase in weight.

(Third vibration damping part)
Further, in the present embodiment, in addition to the first and second vibration damping units 90 described above, a third vibration damping unit 90 is provided.
Specifically, as shown in FIG. 3, the third vibration damping portion 90 is provided on the second surface portion 25 which is the other surface portion of the housing 20 (see FIG. 1).

As described above, the second surface portion 25 is provided with an opening 25a that allows the output gear 50 to be accessed from the outside, and as shown in FIG. 3, the opening 25a is a cylinder described later. A cylindrical wall portion 93 as a first wall portion having a shape, and a second cylindrical wall portion (hereinafter referred to as a cylinder) provided inside the housing 20 (see FIG. 1) and formed along the outer circumference of the opening 25a. , Called an opening wall) 25aa.
Further, the opening 25a is provided at a position facing the output gear 50, and the output gear 50 can come into contact with the outside through the opening 25a.

The third vibration damping portion 90 surrounds the opening 25a along the outer circumference of the opening 25a.
The third vibration damping portion 90 is formed as a cylindrical wall portion 93 provided at a position separated from the opening wall portion 25aa so as to project from the second surface portion 25 to the inside of the housing 20 (see FIG. 1). ..
The cylindrical wall portion 93 surrounds the opening wall portion 25aa.

The third vibration damping portion 90 formed of the cylindrical wall portion 93 formed in this way also has a housing 20 corresponding to the output gear 50 (FIG. 1), similarly to the first and second vibration damping portions 90. Since the weight of the position of the second surface portion 25, which is the other surface portion of (see), is increased, even if vibration occurs, the vibration is quickly damped, resonance and the like are less likely to occur, and noise is reduced. Can be done.

Further, in the present embodiment, as shown in FIG. 3, between the opening wall portion 25aa and the cylindrical wall portion 93, an annular opening wall portion 25aa extending in the circumferential direction and an annular cylindrical wall extending in the circumferential direction A plurality of ribs 93a connecting the portions 93 are formed.

By providing such a rib 93a, the weight can be increased, resonance and the like are less likely to occur, and noise can be reduced.
Further, by providing the rib 93a, the housing 20 is structurally strong, for example, the bending rigidity of the housing 20 is increased. Therefore, vibration can be attenuated and noise can be reduced from this point as well. it can.

(Fourth vibration damping part and fifth vibration damping part)
The first to third vibration damping portions 90 are vibration damping portions 90 provided inside the housing 20 (see FIG. 1), but in the present embodiment, the vibration damping portions 90 are also provided on the outside of the housing 20. The fourth vibration damping section 90 and the fifth vibration damping section 90 will be specifically described below.

As shown in FIG. 1A, a fourth vibration damping portion 90 (see the hatched portion) is provided at a position corresponding to the output gear 50 of the first surface portion 21 which is one surface portion of the housing 20. There is.

The fourth vibration damping portion 90 is configured as a wall thickness increasing portion 94 formed so as to make the wall thickness thicker toward the outside of the housing 20 than the basic wall thickness of the first surface portion 21. It has been increased and structurally strengthened to reduce noise.

The wall thickness increasing portion 94 is configured so that at least a part of the wall thickness increasing portion 94 is included in the region where the range of the output gear 50 arranged in the housing 20 is projected toward the first surface portion 21 side. However, the noise can be further reduced by providing the side wall portion 24 as in the present embodiment.

Similarly, as shown in FIG. 1B, the fifth vibration damping portion 90 (see the hatched portion) is also located at a position corresponding to the output gear 50 in the second surface portion 25 which is the other surface portion of the housing 20. It is provided.

Like the fourth vibration damping portion 90, the fifth vibration damping portion 90 also has a wall thickness formed so as to be thicker toward the outside of the housing 20 than the basic wall thickness of the second surface portion 25. It is configured as an increase section 95, and is designed to reduce noise by increasing the weight and structurally strengthening the structure.

Similar to the wall thickness increasing portion 94, the wall thickness increasing portion 95 is also at least one of the wall thickness increasing portions 95 in a region where the range of the output gear 50 arranged in the housing 20 is projected on the second surface portion 25 side. It is sufficient that the portion is included, but the noise can be further reduced by providing the portion up to the side wall portion 24 as in the present embodiment.

The wall thickness increasing portion 94 and the wall thickness increasing portion 95 determine how much the wall thickness is increased with respect to the basic wall thickness while considering the degree of noise reduction. For example, the basic wall thickness is increased. It is preferable that the wall thickness is 20% or more thicker than the thickness.

Then, when the noise states of those provided with the first to fifth vibration damping portions 90 and those without the above-mentioned first to fifth vibration damping portions 90 are compared, the sound pressure of the sound having the loudest frequency is reduced by 1 dB or more. I was able to confirm.

In the present embodiment, the first to fifth vibration damping units 90 are provided, but it is not always necessary to provide all of the five vibration damping units 90.

For example, in parts used in vehicles such as automobiles, weight reduction in grams may be required from the viewpoint of energy saving, etc., so some vibration damping is considered in consideration of the balance between the degree of sound deadening and weight increase. Part 90 may be omitted.

(Second Embodiment)
FIG. 5 is a diagram for explaining the second embodiment, and the second embodiment will be described below with reference to FIG.
The second embodiment has the same basic configuration as the first embodiment, except that the configuration of the first vibration damping unit 90 is different.
Therefore, in the following, the parts different from the first embodiment will be mainly described, and the description of the parts similar to the first embodiment may be omitted.

FIG. 5A is a perspective view of the inside of the first housing 23, and FIG. 5B is a vibration damping portion of the second embodiment changed to the vibration damping portion 90 of the first embodiment. FIG. 5C is a perspective view showing a mounting member 91'constituting the 90, and FIG. 5C is a perspective view showing a state in which a plurality of mounting members 91'are mounted on the first housing 23.

As shown in FIG. 5A, the first surface portion 21 of the first housing 23 is provided with a plurality of rod-shaped protrusions 21b formed so as to project inward of the housing 20 (see FIG. 1). Has been done.

Then, as shown in FIG. 5B, the crescent-shaped mounting member 91'made of the metal material constituting the vibration damping portion 90 is provided with a plurality of press-fitting holes 91a'in which the rod-shaped protrusions 21b are press-fitted. ing.

Therefore, by mounting the mounting member 91'on the first surface portion 21 by press-fitting the rod-shaped protrusion 21b into the press-fitting hole 91a'of the mounting member 91', the first vibration damping portion 90 of the first embodiment (FIG. 4), the vibration damping portion 90 configured as a cantilevered protruding portion on the first surface portion 21 can be realized.

Then, as shown in FIG. 5 (c), a plurality of mounting members 91'are provided, or as shown in FIG. 5 (a), the number of mounting members 91'is reduced. The weight can be adjusted.
Therefore, it is possible to add an appropriate weight in consideration of the balance between the muffling effect and the weight increase.
Since the outer shape of the mounting member 91'is close to the outer shape of connecting the plurality of convex portions 91 of the first embodiment, the mounting member 91'is the output gear 50 described in the first embodiment. It can be accommodated in the recess 52 (see FIG. 2) so as not to come into contact with the output gear 50.

The case where the rotating device 10 as described above is used in, for example, an air conditioning system for a vehicle such as an automobile, and is simply used for an air conditioning system for a vehicle will be described below.
FIG. 6 is a schematic view for explaining the air conditioning system 100 including the rotating device 10 of the embodiment, and FIG. 7 is a diagram showing a vehicle equipped with the air conditioning system 100 of FIG.

As shown in FIG. 6, the air conditioning system 100 includes a blower fan 101, an evaporator 102, a heater 103, and a louver 104, which are arranged in the front portion FR (see FIG. 7) of the vehicle.

More specifically, the blower fan 101 is arranged on the suction port 100a side of the air conditioning system 100, and the evaporator 102 for cooling the air sent out from the blower fan 101 is arranged on the downstream side in the air flow direction.

Further, the heater 103 is arranged downstream of the evaporator 102 in the air flow direction, the louver 104 is arranged between the evaporator 102 and the heater 103, and the louver 104 flows from the evaporator 102 side to the heater 103 side. By controlling the amount of air supplied, the temperature of the air is adjusted to an appropriate temperature.

The air adjusted to an appropriate temperature is further supplied to the vehicle interior from an air outlet provided in the vehicle interior via a duct or the like. In the above-mentioned air conditioning system 100, for example, The rotating shaft 104a of the louver 104 is connected to the engaging portion 51 (see FIG. 1) of the output gear 50 of the rotating device 10 described above.
Therefore, as described above, the rotation device 10 controls the rotation of the louver 104 (see the double-headed arrow in FIG. 8) so that the louver 104 is in a predetermined state.

The above is only an example of the rotating device 10 in the air conditioning system 100. For example, in the air conditioning system 100, the air inside the vehicle is circulated and the air outside the vehicle is taken into the vehicle interior. The flow path (duct path) may be switched, and a louver is also provided at the switching portion.
Therefore, the rotating device 10 can also be preferably used to control the louver provided in the switching portion.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the embodiments.
In the above embodiment, the case where the sensor 70 is arranged to detect the rotation angle of the output gear 50 has been shown, but the detection of the rotation angle is not limited to the output gear 50.

For example, if the relationship between the rotation angle of one of the plurality of transmission gears 40 and the driving state of a louver (not shown) is obtained, the rotation angle of that gear is detected and based on the rotation angle. By controlling the rotation of the motor 30, it is possible to control the drive of a louver (not shown).
Therefore, the sensor 70 that detects the rotation angle may be arranged so as to detect the rotation angle of any one of the transmission gears 40.

Further, in the above embodiment, the rotary type resistance type position sensor is used for the sensor 70, but the sensor 70 does not necessarily have to be the rotary type resistance type position sensor, and the non-contact type rotary type position sensor is used. It may be.

However, since the resistance type position sensor has a structure in which the conductive brush physically contacts the resistor firmly, detection failure due to the influence of vehicle vibration is unlikely to occur. Therefore, the sensor 70 is a rotary type resistance type position sensor. Is preferable to use.

Further, the vibration damping portion is provided in the housing so that the center of gravity of the first surface portion 21 or the second surface portion 25 of the housing 20 is located closer to the vibration damping portion with respect to the center of the first surface portion 21 or the second surface portion 25. It may be provided.
Here, the center of the first surface portion 21 or the second surface portion 25 is the first surface portion corresponding to the intersection of the diagonal lines of the four mounting portions A, B, C, and D of the housing 20 in the thickness direction of the housing 20. It is the position of 21 or the second surface portion 25.
In order to move the center of gravity closer to the vibration damping portion, the above embodiment can be appropriately applied as the vibration damping portion.

Further, the first vibration damping portion 90 may be provided on the second surface portion 25.

Further, by providing the first vibration damping portion 90 as a weight on the first surface portion 21 and / or the second surface portion 25, a part of the first surface portion 21 and the second surface portion 25 provided with the first vibration damping portion 90. May be heavier than the other parts.

Further, by providing the first vibration damping portion 90 on the first surface portion 21 and / or the second surface portion 25, the bending rigidity of a part of the first surface portion 21 and the second surface portion 25 provided with the first vibration damping portion 90 (Young's modulus) may be larger than the flexural rigidity (Young's modulus) in other parts.

Further, the first vibration damping portion 90 may be provided at a position closer to the fitting portion E or the fitted portion F, or adjacent to the fitting portion E or the fitted portion F with respect to the center of the housing 20. I do not care.
Here, the center of the housing 20 is the intersection of the diagonal lines of the four mounting portions A, B, C, and D of the housing 20 in the thickness direction of the housing 20.

The motor may include, for example, a stator, a rotor, a commutator, a brush, and a bracket provided with a brush (not shown).

As described above, it goes without saying that various changes can be made without departing from the gist of the present invention, and the technical scope of the present invention also includes various changes without departing from the gist of the present invention. It is included in the above, which is clear to those skilled in the art from the description of the scope of claims.

The inventions described in the claims originally attached to the application of the application which is the priority basis of this application are added below.
The claim numbers given in the appendix are the scope of the claims originally attached to the application for this application.
<Claim 1>
With the motor
A plurality of gears including an output gear that outputs the rotation of the motor to the outside,
A housing for accommodating a plurality of the gears and the motor,
The housing is
The first side and
A second surface portion facing the first surface portion and provided apart from the first surface portion, and a second surface portion.
A side wall portion provided on the outer peripheral portion of the first surface portion and the second surface portion and supporting the first surface portion and the second surface portion at a distance is provided.
A rotating device in which a vibration damping portion is provided at a position corresponding to the output gear on at least one surface portion of the first surface portion or the second surface portion.
<Claim 2>
The rotating device according to claim 1, wherein the vibration damping portion is provided so as to project from the surface portion to the inside of the housing, and is a projecting portion that increases the weight of the surface portion.
<Claim 3>
The rotating device according to claim 2, wherein the protruding portion is a plurality of convex portions formed so as to project from the surface portion to the inside of the housing.
<Claim 4>
The rotating device according to claim 2, wherein the protruding portion is a mounting member that is mounted so as to project from the surface portion to the inside of the housing.
<Claim 5>
The housing is made of a resin material.
The rotating device according to claim 4, wherein the mounting member is a metal material.
<Claim 6>
The output gear has a recess and is
The rotating device according to any one of claims 2 to 5, wherein a part of the protruding portion is housed in the recess of the output gear.
<Claim 7>
The surface portion is provided with an opening at a position facing the output gear.
The vibration damping portion is a tubular wall portion that increases the weight of the surface portion, and the tubular wall portion is formed so as to project from the surface portion to the inside of the housing.
The rotating device according to claim 1, wherein the tubular wall portion surrounds the opening.
<Claim 8>
The tubular wall portion is used as the first wall portion.
A tubular second wall that surrounds the opening is provided on the surface.
The second wall portion is surrounded by the first wall portion.
The rotating device according to claim 7, wherein a plurality of ribs connecting the first wall portion and the second wall portion are formed on the surface portion.
<Claim 9>
The rotating device according to any one of claims 1 to 8, wherein the vibration damping portion is a wall thickness increasing portion in which the wall thickness is formed to be thicker than the basic wall thickness of the surface portion to increase the weight.
<Claim 10>
The rotating device according to claim 9, wherein the wall thickness increasing portion is formed so as to increase the wall thickness from the surface portion toward the outside of the housing.

10 ... Rotating device, 20 ... Housing, 21 ... First surface, 21a ... Screw hole, 21b ... Rod-shaped protrusion, 22 ... First side wall, 23 ... First housing, 24 ... Side wall, 25 ... Second Face, 25a ... Opening, 25aa ... Opening wall, 26 ... Second side wall, 27 ... Second housing, 30 ... Motor, 31 ... Main body, 31a ... First end face, 31b ... Second end face, 35 ... 2nd connection terminal, 35a ... Connection part, 40 ... Transmission gear, 41 ... Warm gear, 42 ... 1st 2nd gear, 42a ... Large diameter gear, 42b ... Small diameter gear, 43 ... 2nd 2nd gear, 43a ... Large diameter gear, 43b ... Small diameter gear, 50 ... Output gear, 51 ... Engagement part, 52 ... Recession, 60 ... Gear, 70 ... Sensor, 71 ... Base part, 72 ... First connection terminal, 73 ... Sensor board, 74 ... Covering part, 80 ... Flexible wiring board, 81 ... First flat surface part, 81a ... First engaging hole, 82 ... Second flat surface part, 82a ... Second engaging hole, 83 ... Intermediate flat surface part, 83a ... Bent part, 90 ... Vibration damping part, 91 ... Convex part, 91'... Mounting member, 91a' ... Press-fit hole, 92 ... Screw, 93 ... Cylindrical wall part, 93a ... Rib, 94 ... Wall thickness increase part, 95 ... Thickness increase part, 96 ... Rib, 100 ... Air conditioning system, 101 ... Blower fan, 102 ... Evaporator, 103 ... Heater, 104 ... Louver, 104a ... Rotating shaft, A, B, C, D ... Mounting part, E ... Fitting part, F ... Fitted part, FR ... Front part

Claims (5)

With the motor
A plurality of gears including a gear that outputs the rotation of the motor to the outside, and
The housing including the plurality of gears and the motor is provided.
The plurality of gears include gears that are larger in size than the other gears.
The housing is
A first surface portion having a wall portion surrounding a gear having a size larger than that of the other gear,
A second surface portion facing the first surface portion and provided apart from the first surface portion in the rotation axis direction of a gear having a size larger than the other gears.
The first surface portion and the side wall portion that supports the second surface portion are provided.
The first surface portion has a vibration damping portion.
The vibration damping portion includes a protruding portion protruding from the first surface portion to the inside of the housing, and a mounting member attached to the protruding portion.
The first surface portion faces a gear having a size larger than that of the other gears.
The vibration damping portion is a rotating device located closer to the side wall portion with respect to the wall portion of the first surface portion. The vibration damping portion includes a plurality of protruding portions and
A plurality of mounting members mounted on the plurality of protrusions are provided.
The plurality of protrusions include the protrusions, and the protrusions include the protrusions.
The rotating device according to claim 1, wherein the plurality of mounting members include mounting members mounted on the protruding portion. The rotating device according to claim 1 or 2, wherein the vibration damping portion includes a screw hole formed in the protruding portion and a screw screwed and attached to the screw hole. The rotating device according to any one of claims 1 to 3, wherein the vibration damping portion includes a plurality of rod-shaped protrusions and a mounting member attached to the plurality of rod-shaped protrusions. The rotating device according to any one of claims 1 to 4, wherein the protruding portion is closer to the side wall portion with respect to the position of the first surface portion corresponding to a gear having a size larger than the other gear.

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