Driving motor

Abstract

Provided is a driving motor that will meet the requests of making the length of a rotating axis of the driving motor to be shorter in the axial direction, and which will also have waterproof, vibration resistance, and soundproof characteristics. In this driving motor (3); a motor interior-space (35) is formed by a housing (21) that has a first and second opening and which is formed to be cylinder shaped, and a flange (22) that blocks the second opening of this housing (21); and a stator assembly (18), a rotor assembly (20), a lower-side end section of the rotating axis (12) that has been placed lower than the flange (22) up until now, and a control circuit-board (19) are all made to be contained in this motor interior-space (35). Furthermore, a ring-shaped elastic member (45) is made to intervene between the upper-side end section of the rotating axis (12) and the first opening of the housing (21); and the lower-side end section of the rotating axis (12), the stator assembly (18), and the rotor assembly (20) are made to be fixed to the flange (22) through a mounting elastic member (59).

Description

technical field [0001] The present invention relates to a motor housed in, for example, a case having a passage for air flow, such as a blower case constituting an air supply unit of a vehicle air conditioner, and used to drive a predetermined air conditioner such as a fan. Background technique [0002] In recent years, as drive motors for air blowers in vehicle air conditioners and hybrid vehicle ventilators, products that are smaller than conventional products and have high performance are required. Accordingly, there is a demand for the development of a driving motor that is excellent in water resistance and heat dissipation, has a small size in the axial direction of the rotating shaft of the blower, and can suppress manufacturing costs. [0003] In this regard, for example, a vehicle-mounted air blower including a brushless motor disclosed in Patent Document 1 is known. The vehicle-mounted air blower disclosed in Patent Document 1 has: a brushless motor that rotates th...

AI Technical Summary

Problems solved by technology

[0013] However, in the brushless motor of the vehicle-mounted air blower disclosed in Patent Document 1, a control circuit board storage room is formed by providing a lower case under an upper case, and a control circuit board is stored in the control circuit board storage room. Since there is a convex portion that bulges downward compared to the upper case, there is a problem that the convex portion protrudes out of the duct, and at the same time, the vehicle-mounted air blower must be installed on the duct.

[0014] In addition, in the brushless motor of the vehicle-mounted air blower disclosed in Patent Document 1, the cooling fins for dissipating heat generated from the components on the control circuit board are arranged facing the air blower side, and accordingly there are the following disadvantages. That is, the structure is complicated and the manufacturing cost of the brushless motor is also relatively high

Furthermore, since the brushless motor disclosed in this patent document 1 is not sufficiently waterproofed regardless of whether it is used in a vehicle-mounted air blower, there is also a problem that the components of the brushless motor are prone to rust.

[0015] In addition, in the brushless motor of the vehicle-mounted air blower disclosed in Patent Document 2, a control circuit board storage room is formed by providing a lower case under an upper case, and a control circuit board is stored in the control circuit board storage room. Since there is a convex portion that bulges downward compared to the upper case, there is a problem that the convex portion protrudes out of the duct, and at the same time, the vehicle-mounted air blower must be installed on the duct.

[0016] Furthermore, in the brushless motor of the vehicle-mounted air blower disclosed in Patent Document 2, the cooling fins for dissipating heat generated from the components on the control circuit board are arranged facing the air blower side, and accordingly there are the following disadvantages. That is, the structure is complicated and the manufacturing cost of the brushless motor is also relatively high

Furthermore, since the brushless motor disclosed in this patent document 2 is not sufficiently waterproofed regardless of whether it is used in a vehicle-mounted air blower, there is also a problem that the components of the brushless motor are prone to rust.

[0017] Moreover, in the case of using the anti-vibration member shown in Patent Document 4, since the structure of the anti-vibration member is relatively complicated and has a special structure, there is a disadvantage that the manufacturing cost of the anti-vibration member is relatively increased, Furthermore, the manufacturing cost of the driving motor using the anti-vibration member is also relatively high.