Direct current brushless motor and draining pump

Abstract

The invention discloses a direct current brushless motor and a draining pump. The direct current brushless motor comprises an upper end cover, a lower end cover, motor shafts, an upper bearing, a lower bearing, a stator assembly and a rotor assembly; the motor shafts respectively penetrate through shaft outputting holes of the upper end cover and the lower end cover through the upper bearing and the lower bearing; a side wall extending upward is formed on the upper surface of the upper end cover to form an upper bearing chamber; and an upward bearing surface is formed at the shaft outputting hole of the upper end cover; the upper bearing is arranged in the upper bearing chamber and is located on the bearing surface; the top surface of the upper bearing chamber is provided with an upper pressing cover, the upper pressing cover is connected with the side wall of the upper end cover to press and fix the upper bearing. According to the direct current brushless motor and the draining pump provided by the invention, the upper bearing of the motor is arranged on the upper side of the upper end cover, so that the oil reserve of the lubricant can be increased, leakage and seepage of the lubricant during long-term operation can be prevented, and the service life of the motor can be effectively prolonged. The upper bearing is moved from the internal side of the end cover to the external side, therefore, the space for a drive circuit board provided by the internal part of the motor can be enlarged, thereby enlarging the board distribution area of the circuit board.

Description

technical field [0001] Embodiments of the present invention relate to motor structure technology, in particular to a DC brushless motor and a drainage pump. Background technique [0002] Drainage pumps are widely used in drainage equipment in various fields of production and life. For example, the indoor unit of a ceiling-mounted air conditioner needs to use a drain pump. When the air conditioner is running, a large amount of condensed water will be generated on the surface of the heat exchanger due to the cooling of the air. When the water accumulates to a certain extent, it will drop into the condensed water tank below the heat exchanger. It is necessary to install a drain pump inside to discharge the condensed water to the outside. Usually, according to different application requirements, the drainage pump is required to have a certain flow rate and head, and due to the noise requirements of the use environment, the working noise of the drainage pump should also be limi...

AI Technical Summary

Problems solved by technology

The lubricating oil in the bearing chamber of the upper end cover 102 of the motor 100 infiltrates and drips due to gravity and high temperature during long-term operation, causing the lubricating oil to be lost prematurely, which will cause the motor bearings to not be lubricated effectively, generate noise, and even Cause the motor shaft 101 and the bearing to wear and tear and fail

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