Rotary apparatus

1. A rotary apparatus comprising:

a motor;

a plurality of gears including an output gear; and

a housing accommodating the plurality of gears and an entirety of a frame of the motor, wherein

the housing includes

a first surface portion,

a second surface portion opposing the first surface portion and spaced apart from the first surface portion, and

a sidewall portion provided at an outer peripheral portion of the first surface portion and the second surface portion and supporting the first surface portion and the second surface portion, wherein:

the housing is formed with a first housing and a second housing,

the first housing includes the first surface portion and a first sidewall portion forming a part of the sidewall portion,

the second housing includes the second surface portion and a second sidewall portion forming an other part of the sidewall portion,

the first surface portion and/or the second surface portion includes a vibration damping part opposing the output gear in a rotary axis direction of the output gear such that at least one of the first surface portion and/or the second surface portion defines an associated surface portion with the vibration damping part,

the vibration damping part is a projecting portion projecting into the housing from the associated surface portion and increases the weight of the associated surface portion,

the projecting portion comprises a plurality of protruded portions projecting into the housing from the associated surface portion,

the output gear has a recessed portion, and

a part of the projecting portion is accommodated in the recessed portion of the output gear.

2. The rotary apparatus according to claim 1 , wherein

the projecting portion is an attachment member attached in the housing, and

the attachment member projects into the housing from the first surface portion and/or the second surface portion.

3. The rotary apparatus according to claim 2 , wherein

the housing is formed with a resin material, and

the attachment member is formed with a metal material.

4. The rotary apparatus according to claim 1 , wherein

the first surface portion and/or the second surface portion includes an opening portion facing the output gear;

the vibration damping part is a tubular wall portion that increases the weight of the associated surface portion, the tubular wall portion projecting into the housing from the first surface portion and/or the second surface portion; and

the tubular wall portion surrounds the opening portion.

5. The rotary apparatus according to claim 4 , wherein,

the tubular wall portion is a first wall portion;

the first surface portion and/or the second surface portion includes a second wall portion surrounding the opening portion and the second wall portion is tubular;

the second wall portion is surrounded by the first wall portion; and

the first surface portion and/or the second surface portion includes a plurality of ribs connecting the first wall portion and the second wall portion.

6. The rotary apparatus according to claim 4 , wherein

the opening portion is located at a portion corresponding to a center side of the output gear and provides access to the output gear from outside.

7. The rotary apparatus according to claim 1 , wherein

the vibration damping part is an increased thickness portion having a thickness greater than a basic thickness of the first surface portion and/or the second surface portion and a weight greater than a weight of the first surface portion and/or the second surface portion.

8. The rotary apparatus according to claim 7 , wherein

the thickness of the increased thickness portion increases from the first surface portion and/or the second surface portion toward outside the housing.

9. The rotary apparatus according to claim 1 , wherein

the rotary apparatus is configured to be disposed in an air conditioning system.