JP2020092602A - 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 of a vehicle air conditioning system flows.

Japanese Patent Laid-Open No. 2015-220969

By the way, in recent years, the quietness of the environment inside the vehicle has tended to increase, but in the case of a vehicle driven by a motor such as an electric vehicle, the noise generated by the internal combustion engine is not emitted, and thus the quietness inside the vehicle is significantly increased.

With such a high level of noise reduction, even in a vehicle equipped with an internal combustion engine, even a sound that was not so noticeable becomes noticeable in the vehicle. It is believed that even higher noise levels will be required.

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 with improved quietness.

The present invention is grasped by the following configurations in order to achieve the above object.
(1) A rotating device of the present invention includes a motor, a plurality of gears including an output gear that outputs the rotation of the motor to the outside, and a housing that houses the plurality of gears and the motor. The body is provided on a first surface portion, a second surface portion that faces the first surface portion and is spaced apart from the first surface portion, and an outer peripheral portion of the first surface portion and the second surface portion, and A side surface portion that separates and supports the first surface portion and the second surface portion, and at least one surface portion of the first surface portion and the second surface portion has a vibration damping portion located inside the output gear. The vibration damping portion is a protruding portion provided so as to protrude from the surface portion, the protruding portion is configured by a plurality of convex portions, and the output gear has a concave portion facing the surface portion. A part of the protrusion is housed in the recess of the output gear, and a predetermined gap is provided between the recess and the protrusion that face each other.

(2) In the configuration of (1) above, the concave portion faces the surface portion.

(3) In the configuration of (1) or (2) above, a part of the protruding portion on the tip side is located in the recess.

(4) In the configuration according to any one of (1) to (3) above, the center of gravity of the surface portion is located closer to the vibration damping portion than the center of the surface portion.

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

It is a figure of the rotation device of a 1st embodiment concerning the present invention, (a) is a perspective view which looked at the 1st surface part side of a case, and (b) is a perspective which looked at the 2nd surface part side of the case. It is a figure. It is the perspective view which removed the 1st case of the rotation device of a 1st embodiment concerning the present invention. It is an exploded perspective view of the rotation device of a 1st embodiment concerning the present invention. It is the perspective view which looked at the inside of the 1st case of a 1st embodiment concerning the present invention. It is a figure for demonstrating 2nd Embodiment which concerns on this invention, (a) is a perspective view which looked at the inside of a 1st housing, (b) is a 1st vibration damping part of 1st Embodiment. It is a perspective view which shows the attachment member which comprises the vibration damping part of 2nd Embodiment changed into FIG. 6, and (c) is a perspective view which shows the state which attached the attachment member to the 1st housing|casing several. It is a schematic diagram for explaining an air-conditioning system provided with a rotation device of an embodiment concerning the present invention. It is a figure which shows the vehicle provided with the air conditioning system of FIG.

Hereinafter, modes 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 denoted by the same numbers throughout the description of the embodiments.

(First embodiment)
1A and 1B are diagrams of a rotating device 10 according to an embodiment of the present invention, FIG. 1A is a perspective view of a first surface portion 21 side of a 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.
2 is a perspective view of the rotating device 10 with the first housing 23 removed, and FIG. 3 is an exploded perspective view of the rotating device 10.

As shown in FIG. 1, the rotating device 10 includes 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 spaced from the first surface portion 21. The side wall portion 24 is provided on the outer peripheral portion of the first surface portion 21 and the second surface portion 25, and separates the first surface portion 21 and the second surface portion 25 and connects or supports them.

Specifically, as shown in FIG. 2, the housing 20 includes a first side wall 21 and a first side wall that constitutes a part of a side wall 24 (see FIG. 1) provided on an outer peripheral portion of the first surface 21. A second case having a first housing 23 having a portion 22 and a second side wall portion 26 forming a part of a side wall portion 24 (see FIG. 1) provided on the outer peripheral portion of the second surface portion 25 and the second surface portion 25. The housing 27 and the housing 27 are combined.
The housing 20 is made of a resin material such as polypropylene, polyethylene terephthalate, ABS or the like.

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 components housed in the housing 20 (see FIG. 1). A plurality of gears 60 including an output gear 50 for

As shown in FIGS. 2 and 3, the rotation device 10 includes a sensor 70 for detecting the rotation angle of the output gear 50 and a sensor 70 as various components housed in the housing 20 (see FIG. 1). 3 provided on the base portion 71 of the sensor 70 for obtaining a rotation angle signal according to the rotation angle, and the base portion 71 of the sensor 70 and electrically connected to the motor 30. It is provided with one second connection terminal 35 and a flexible wiring board 80 (see FIG. 3) that electrically connects the two motor terminals (not shown) of the motor 30 and 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 includes a main body 31 having a rectangular columnar outer shape with curved corners, and a rotation shaft (not shown) to which the worm gear 41 is fixed and which is led out from the first end surface 31 a of the main body 31. And a pair of motor terminals (not shown) for power supply, which are located on the opposite side of the first end surface 31a of the main body 31 and project outward from the second end surface 31b facing the first end surface 31a. No)), and.
A rotation shaft is fixed to the rotor.

(Transmission gear)
As shown in FIGS. 2 and 3, the plurality of gears 60 includes a transmission gear 40, and the transmission gear 40 rotates the rotation shaft (not shown) of the motor 30 at a predetermined gear ratio. This is a gear for transmission to the output gear 50, and in this embodiment, three gears (a worm gear 41, a first two-stage gear 42, and a second two-stage 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 rotation shaft (not shown) of the motor 30, a gear 42 a having a large diameter connected to the worm gear 41, and a small diameter. A first two-stage gear 42 having a gear 42b, a large diameter gear 43a connected to the smaller diameter gear 42b in the first two-stage gear 42, and a smaller diameter gear 43b connected to the output gear 50 (see FIG. 3). ) Having a second two-stage gear 43.

In addition, in the present embodiment, the first two-stage gear 42 and the second gear 42 and the second gear 42 are arranged 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. Although the second two-stage gear 43 is used, for example, the second second-stage gear 43 may be omitted and the output gear 50 may be connected to the gear 42b having a smaller diameter than the first second-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 two-step gear 43.

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

For this reason, 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, the drive shaft of the 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 may be provided between the rotation device 10 and the drive shaft of the louver (not shown). The rotating shaft of the intervening gear is connected to the output gear 50.

(sensor)
For example, an air conditioner mounted on an automobile is provided with a louver.
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 brought into a predetermined state.

In the present embodiment, a rotary resistance type position sensor is used as the sensor 70. As shown in FIGS. 2 and 3, the sensor 70 obtains a rotation angle signal corresponding to the rotation angle of the output gear 50. It has three first connection terminals 72 for input/output, a sensor substrate 73 on which a resistor is printed to which the first connection terminal 72 is electrically connected, 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 disposing them, and a base portion 71 that is provided at a position corresponding to the rotating body (not shown). And a cover portion 74 forming a sensor housing.

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 electrically connected through 80 (see FIG. 3) are also arranged and fixed.

As described above, when the first connection terminal 72 and the second connection terminal 35 are collectively arranged and fixed to the base portion 71 of the sensor 70, the space can be effectively used, and thus the rotating device 10 can be downsized.

Further, by disposing the first connection terminal 72 and the second connection terminal 35 on the base portion 71, other components housed in the housing 20 (see FIG. 1) and the first connection terminal 72 and the second connection are provided. It is possible to avoid contact with the terminal 35 and further improve reliability.

Further, since the base portion 71 is simple in shape, even if a structure for arranging and fixing the first connecting terminal 72 and the second connecting terminal 35 is provided, the cost of the mold for molding the base portion 71 is low. Is never high.

On the other hand, since the housing 20 has a structure for arranging various components, if a structure for arranging and fixing the first connecting terminal 72 and the second connecting terminal 35 is further provided, the housing 20 is Since the mold for molding the (first casing 23 and the second casing 27) becomes complicated and the cost of the mold and the like increases, the manufacturing cost of the casing 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 with respect to the first connection terminal 72. The wiring distance between the second connection terminal 35 and the motor terminal (not shown) of the motor 30 can be shortened, and the electric wiring between the second connection terminal 35 and the motor terminal (not shown) of the motor 30 can be made compact. Can be something.

(First connection terminal and second 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 the flexible wiring boards described later. It is electrically connected to two motor terminals (not shown) which are power source terminals of the motor 30 via 80.

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

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

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

Therefore, the soldering is performed by engaging the two first engaging holes 81a of the first surface portion 81 with the connecting portions 35a of the two second connecting terminals 35, so that a reliable electrical connection can be achieved. Since it can be performed, connection failure can be suppressed.
Similarly, a pair of motor terminals (not shown) of the motor 30 are soldered by engaging the second engaging holes 82a of the second surface portion 82, thereby ensuring a stable electrical connection. Since connection can be performed, connection failure can be suppressed.

It is also possible to connect a lead wire between the second connection terminal 35 and the motor terminal (not shown) of the motor 30.
The flexible wiring board is more preferable than the lead wire in terms of handleability and is less likely to be damaged, and thus is preferable in terms of good connection workability.
On the other hand, when 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 that connects the first surface portion 81 and the second surface portion 82 of the flexible wiring board 80. The bent portion 83a is provided so as to be arranged.
This bent portion 83a is also provided with a folded structure.

For example, when the second connection terminal 35 and the motor terminal (not shown) of the motor 30 are linearly connected by the flexible wiring board 80, when the motor 30 and the second connection terminal 35 vibrate due to the vibration of the vehicle. , Tensile stress is easily applied to 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, which may cause connection failure or flexible wiring. The breakage of the substrate 80 is likely to occur.

Therefore, in the present embodiment, the angle formed by the first surface portion 81 and the second surface portion 82 (the bending angle) in the middle of reaching the motor terminal (not shown) of the motor 30 from the second connection terminal 35 in accordance with vibration or the like. ), and a bent portion 83a provided with a folded structure exhibiting a spring property is interposed.

By doing so, the bending portion 83a provided with the folded structure is deformed so that the bending angle changes according to vibration and the like and exhibits spring properties, so that the second connection terminal 35 and the flexible wiring board 80 are It is possible to avoid applying tensile stress or the like to the connection portion of the flexible wiring board 80 and the connection portion of the flexible wiring board 80 and the motor terminal (not shown), and it is possible to suppress the occurrence of connection failure and to disconnect the flexible wiring board 80 itself. And the like 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 where wiring is performed in a straight line, and the influence of tensile stress or the like. Therefore, such a bent portion may be used.
On the other hand, as in the present embodiment, it is preferable to use the bent portion having the folded structure because the bent portion 83a provided with the folded structure can be less affected by the tensile stress and the like. is there.

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

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

(Case)
As described above, the housing 20 is configured by combining the first housing 23 and the second housing 27.
Then, when the state of noise was examined for each part of the housing 20, the vibration of the positions of the first surface portion 21 and the second surface portion 25 corresponding to the output gear 50 was the cause of noise larger than other portions. 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 large-sized output gear 50 that cannot contact other members is arranged, there is no structure for suppressing vibration. It is considered that the position where vibrations 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 is reduced. The vibration damping unit 90 will be specifically described below.

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

(First vibration damping section)
As shown in FIG. 4, at the position corresponding to the output gear 50 (around the dotted line frame B) of the first surface portion 21 that is one surface portion of the housing 20 (see FIG. 1), the first surface portion that is one surface portion. A first vibration damping section 90 is provided as a projecting section that is formed by projecting from the inside of the housing 20 and is cantilevered on the first surface section 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 has a rod-shaped outer shape.
In addition, on the inner surface of the first surface portion 21 facing the second surface portion 25, 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.

In this way, by providing the projecting portion constituted by 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 frame B) is provided. 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 quickly attenuated over time, so that the noise generated 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 casing 20 and reduce noise.

As can be seen from the dotted line frame B, the protruding portion formed by the plurality of protruding portions 91 is located inside the output gear 50.
Therefore, as shown in FIGS. 2 and 3, the output gear 50 is provided with a concave portion 52 on the surface facing the first surface portion 21.
The recess 52 accommodates the protrusion while avoiding contact with the protrusion formed of the plurality of protrusions 91.
The protrusion formed of the plurality of protrusions 91 is arranged to protrude from the first surface portion 21 so that a part of the protrusion formed of the plurality of protrusions 91 on the tip end side is located in the recess 52. Has been formed.
A predetermined gap is provided between the recess 52 and the protrusion, and the recess 52 has a recessed shape and avoids contact between the recess 52 and the protrusion by providing the gap. ing.

It is also possible to form the projecting portion not as the plurality of convex portions 91 but as one convex portion integrally connected to each other.
Such a projecting portion, which is one convex portion that is integrally connected, is likely to be deformed when the housing 20 (more specifically, the first housing 23) is molded, and therefore, as in the present embodiment. When integrally formed with the housing 20 (more specifically, the first housing 23 ), it is preferable to provide protrusions as the plurality of protrusions 91.

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

Specifically, as shown in FIG. 4, the housing 20 (at a position near the first side wall portion 22 that is close to the first vibration damping portion 90 having a protrusion formed of a plurality of protrusions 91). A plurality of screw holes 21a are formed in the first surface portion 21, which is one surface portion (see FIG. 1).
The plurality of metal screws 92 screwed and attached to the screw holes 21 a are attachment members attached to the first surface portion 21 of the housing 20.
The second vibration damping portion 90 configured by this mounting member is provided on the first surface portion 21 of the housing 20.
The plurality of screw holes 21a and the screws 92 are provided on the inner surface or the outer surface of the surface portion.
Here, the inner surface refers to a surface facing the inside of the housing 20, and the outer surface refers to a surface facing the outside of the housing 20.
The screw 92 is made of a metal material such as iron and aluminum.

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, and therefore the weight is increased. Therefore, the noise is reduced in the same manner as the first vibration damping section 90 described above.

In addition, in the above, the case where the first vibration damping portion 90 is the protruding portion configured by the plurality of convex portions 91 formed by protruding from the first surface portion 21 which is one surface portion to the inside of the housing 20 is shown. However, similar to the second vibration damping portion 90, the first vibration damping portion 90 may be configured as a mounting member by providing a plurality of convex portions 91 by screw connection.
Further, although the first vibration damping portion 90 and the second vibration damping portion 90 are provided on the first surface portion 21, the first vibration damping portion 90 and the second vibration damping portion 90 are provided on the second surface portion 25. The first and second vibration damping portions 90 may be provided on both the first and second surface portions.

As described above, since the vibration damping portion 90 is configured as the attachment member, the selection range of the material can be widened, so that the size of the vibration damping portion 90 for obtaining the necessary weight can be kept small. In addition, while confirming the noise condition, it is possible to omit some mounting members and suppress the noise while minimizing the increase in weight.

(Third vibration damping section)
Furthermore, in this embodiment, in addition to the above-described first and second vibration damping portions 90, a third vibration damping portion 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 the opening portion 25a that allows the output gear 50 to be accessed from the outside. As shown in FIG. 3, the opening portion 25a is formed in the cylinder described later. -Shaped cylindrical wall portion 93 as a first wall portion, and a cylindrical second wall portion that is provided inside the housing 20 (see FIG. 1) and is formed along the outer periphery of the opening portion 25a (hereinafter , Referred to as an opening wall portion) 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 periphery of the opening 25a.
The third vibration damping portion 90 is formed as a cylindrical wall portion 93 provided at a position apart 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.

Similarly to the first and second vibration damping portions 90, the third vibration damping portion 90 formed by the cylindrical wall portion 93 formed in this manner also corresponds to the output gear 50 (see FIG. 1). Since the weight of the position of the second surface portion 25, which is the other surface portion of the reference), is increased, even if vibration is generated, the vibration is quickly attenuated, resonance is less likely to occur, and noise is reduced. You can

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

By providing such ribs 93a, the weight can be increased, resonance is less likely to occur, and noise can be reduced.
Further, by providing the ribs 93a, the housing 20 becomes structurally strong, for example, the bending rigidity of the housing 20 becomes high, so that vibration can be damped 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 the 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 outside the housing 20. In the following description, the fourth vibration damping section 90 and the fifth vibration damping section 90 will be specifically described.

As shown in FIG. 1A, a fourth vibration damping portion 90 (see a hatched portion) is provided at a position corresponding to the output gear 50 on 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 have a wall thickness thicker toward the outside of the housing 20 than the basic wall thickness of the first surface portion 21. Increased and structurally strengthened to reduce noise.

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

Similarly, as shown in FIG. 1B, a fifth vibration damping portion 90 (see a hatched portion) is also provided at a position corresponding to the output gear 50 on 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 is also formed to have a wall thickness that is thicker toward the outside of the housing 20 than the basic wall thickness of the second surface portion 25. It is configured as an increasing portion 95 to reduce the noise by increasing the weight and structurally strengthening it.

Similar to the wall thickness increasing portion 94, the wall thickness increasing portion 95 has at least a portion of the wall thickness increasing portion 95 in a region where the range of the output gear 50 arranged in the housing 20 is projected to the second surface 25 side. It suffices that the parts are included, but the noise can be further reduced by providing the parts up to the side wall part 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 to be increased with respect to the basic wall thickness in consideration of the degree of noise reduction. It is preferable that the thickness is 20% or more of the thickness.

Then, when the noise states of the above-described first and fifth vibration damping units 90 and those not provided are compared, a sound pressure drop of 1 dB or more is observed in the sound of the loudest frequency. I was able to confirm.

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

For example, for parts used in vehicles such as automobiles, weight reduction in grams may be required from the viewpoint of energy saving, so some vibration damping should be considered in consideration of the balance between noise reduction and weight increase. The unit 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 that of the first embodiment, and is different only in the configuration of the first vibration damping section 90.
Therefore, in the following, a description will be given mainly of the parts different from the first embodiment, and description of the same parts as 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 in which the first vibration damping portion 90 of the first embodiment is replaced. FIG. 5 is a perspective view showing a mounting member 91 ′ that constitutes 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 projections 21b formed so as to project toward the inside of the housing 20 (see FIG. 1). Has been.

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

Therefore, the bar-shaped projection 21b is press-fitted into the press-fitting hole 91a′ of the mounting member 91′ so that the mounting member 91′ is mounted on the first surface portion 21 so that the first vibration damping portion 90 of the first embodiment (see FIG. 4), it is possible to realize the vibration damping portion 90 configured as a cantilevered protrusion on the first surface portion 21.

Then, as shown in FIG. 5(c), a plurality of attachment members 91' are attached, or as shown in FIG. 5(a), attachment members 91' are attached by reducing the attachment number. The weight can be adjusted.
Therefore, it is possible to add an appropriate weight in consideration of the balance between the sound deadening effect and the weight increase.
Since the outer shape of the mounting member 91′ is close to the outer shape of the plurality of convex portions 91 of the first embodiment, the mounting member 91′ is the same as the outer shape of the output gear 50 described in the first embodiment. The output gear 50 can be housed in the recess 52 (see FIG. 2) so as not to contact the output gear 50.

The rotating device 10 as described above is used, for example, in an air conditioning system of a vehicle such as an automobile, and hereinafter, a case where it is simply used in an air conditioning system of a vehicle will be described.
FIG. 6 is a schematic diagram for explaining an air conditioning system 100 including the rotating device 10 of the embodiment, and FIG. 7 is a diagram showing a vehicle including the air conditioning system 100 in 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 a front portion FR (see FIG. 7) of the vehicle.

More specifically, a blower fan 101 is arranged on the suction port 100a side of the air conditioning system 100, and an evaporator 102 that cools the air sent 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, and the louver 104 is arranged between the evaporator 102 and the heater 103. The louver 104 flows from the evaporator 102 side to the heater 103 side. By controlling the supply amount of air, the temperature of air is adjusted to an appropriate temperature.

Then, the air whose temperature is adjusted to an appropriate temperature is further supplied into the vehicle compartment from an outlet provided in the vehicle compartment via a duct or the like. In the air conditioning system 100 described above, 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) to bring it into a predetermined state.

It should be noted that the above only shows an example of the rotating device 10 in the air conditioning system 100. For example, the air conditioning system 100 can be used to circulate the air in the vehicle interior and to take the air outside the vehicle into the vehicle interior. The flow path (duct path) may be switched in some cases, and a louver is also provided at the switching portion.
Therefore, the rotating device 10 can be preferably used to control the louvers provided in the switching portion.

Although the present invention has been described above based on the embodiment, the present invention is not limited to the embodiment.
In the above embodiment, the case where the sensor 70 is arranged so as to detect the rotation angle of the output gear 50 has been described, 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 the louver (not shown) is obtained, the rotation angle of the gear is detected and based on the rotation angle. By controlling the rotation of the motor 30, drive control of a louver (not shown) can be performed.
Therefore, the sensor 70 for detecting 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 resistance type position sensor is used as the sensor 70, but the sensor 70 does not necessarily have to be a rotary resistance type position sensor, and a non-contact type rotary position sensor. May be

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

Further, a 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 than 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 corresponds to the intersection of the diagonal lines of the four mounting portions A, B, C, D of the housing 20 in the thickness direction of the housing 20. 21 or the position of the second surface portion 25.
In order to make 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 section 90 may be provided on the second surface section 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 on which the first vibration damping portion 90 is provided. 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 on which the first vibration damping portion 90 is provided. The (Young's modulus) may be larger than the bending rigidity (Young's modulus) in other portions.

Further, the first vibration damping portion 90 may be provided near the center of the housing 20 toward the fitting portion E or the fitted portion F, or at a position adjacent to the fitting portion E or the fitted portion F. 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 the brush, which are not shown.

As described above, it goes without saying that various modifications can be made without departing from the scope of the present invention, and various modifications without departing from the scope of the invention also cover the technical scope of the present invention. , Which is obvious to a person skilled in the art from the description of the claims.

The invention described in the scope of the claims first attached to the application for the application which is the priority basis of this application will be additionally described below.
The claim numbers in the appended claims are as set forth in the claims originally attached to the application for this application.
<Claim 1>
A motor,
A plurality of gears including an output gear that outputs the rotation of the motor to the outside,
A housing for housing the plurality of gears and the motor,
The housing is
A first surface portion,
A second surface portion facing the first surface portion and provided apart from the first surface portion;
A side wall portion that is provided on the outer peripheral portion of the first surface portion and the second surface portion and that supports the first surface portion and the second surface portion by separating them from each other;
A rotation device in which a vibration damping portion is provided at a position corresponding to the output gear on at least one of the first surface portion and the second surface portion.
<Claim 2>
The rotation device according to claim 1, wherein the vibration damping portion is a protrusion that is provided so as to protrude from the surface portion to the inside of the housing and increases the weight of the surface portion.
<Claim 3>
The rotating device according to claim 2, wherein the projecting portion is a plurality of projecting portions formed to project from the surface portion to the inside of the housing.
<Claim 4>
The rotating device according to claim 2, wherein the projecting 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 a resin material,
The rotating device according to claim 4, wherein the mounting member is made of a metal material.
<Claim 6>
The output gear has a recess,
The rotating device according to any one of claims 2 to 5, wherein a part of the protrusion 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 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 as the first wall portion,
A tubular second wall portion surrounding the opening is provided on the surface portion,
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>
9. The rotating device according to claim 1, wherein the vibration damping portion is a wall thickness increasing portion that is thicker than a basic wall thickness of the surface portion to increase the weight.
<Claim 10>
The rotation device according to claim 9, wherein the thickness increasing portion is formed so as to increase in thickness from the surface portion toward the outside of the housing.

DESCRIPTION OF SYMBOLS 10... Rotation device, 20... Housing|casing, 21... 1st surface part, 21a... Screwing hole, 21b... Rod-shaped projection, 22... 1st side wall part, 23... 1st housing|casing, 24... Side wall part, 25... 2nd Surface portion, 25a... Opening portion, 25aa... Opening wall portion, 26... Second side wall portion, 27... Second housing, 30... Motor, 31... Main body portion, 31a... First end surface, 31b... Second end surface, 35... Second connection terminal, 35a... Connection part, 40... Transmission gear, 41... Worm gear, 42... First two-stage gear, 42a... Large diameter gear, 42b... Small diameter gear, 43... Second two-stage gear, 43a ... a gear having a large diameter, 43b... a gear having a small diameter, 50... an output gear, 51... an engaging portion, 52... a concave portion, 60... a gear, 70... a sensor, 71... a base portion, 72... a first connecting terminal, 73... Sensor substrate, 74... Cover portion, 80... Flexible wiring board, 81... First flat surface portion, 81a... First engaging hole, 82... Second flat surface portion, 82a... Second engaging hole, 83... Intermediate flat surface portion, 83a... Bent portion, 90... Vibration damping portion, 91... Convex portion, 91'... Mounting member, 91a'... Press-fit hole, 92... Screw, 93... Cylindrical wall portion, 93a... Rib, 94... Wall thickness increasing portion, 95... Wall thickness increasing 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 (4)

A motor,
A plurality of gears including an output gear that outputs the rotation of the motor to the outside,
A housing for housing the plurality of gears and the motor,
The housing is
A first surface portion,
A second surface portion facing the first surface portion and provided apart from the first surface portion;
Equipped with
At least one of the first surface portion and the second surface portion has an opening facing the output gear, a plurality of first vibration damping portions, and a plurality of second vibration damping portions,
The first vibration damping portion is a protruding portion extending in a direction intersecting with the rotation axis of the motor,
The plurality of second vibration damping portions surround the opening,
Each of the plurality of second vibration damping portions is a protruding portion provided so as to protrude from the at least one surface portion,
In the rotation axis direction of the gear, the second vibration damping portion is longer than the first vibration damping portion,
A rotating device in which an attachment member is attached to each of the plurality of protrusions. Each of the plurality of protrusions has a bar-shaped outer shape,
The rotating device according to claim 1, wherein each of the plurality of attachment members is attached to the at least one surface portion via the protrusion. The rotating device according to claim 1 or 2, wherein each of the plurality of mounting members is a screw that is screwed and mounted in a screw hole formed in the protrusion. The plurality of first vibration damping portions are provided on the inner surface of the first surface portion,
The rotation device according to claim 1, wherein the weight of the first surface portion is increased by the plurality of first vibration damping portions.