Electric motor for a fan

Abstract

The motor for the fan includes a housing (3), characterized in that the surface of the housing is smooth, a sleeve (6) is provided on the outer periphery of the housing, the inner diameter of the sleeve is larger than the diameter of the fan impeller, multiple stiffeners (11) are symmetrically provided between the sleeve and the housing, the width of the stiffener is smaller than the length of the stiffener, the width direction of the stiffener is parallel to the axis of the motor, the sleeve, the housing and the stiffeners are a whole, a stator winding lead hole (9) is provided at one end of the housing, and a stop (12) is provided on the inner circle at both ends of the sleeve. The beneficial effects are that the surface of the motor housing is smooth, which does not hinder the airflow of the fan; the sleeve can serve as the housing of the fan, the motor housing, stiffeners and sleeve are cast into a whole, the connection strength between them is high, and the connection between them will not be loosened due to vibration, which can ensure that the housing and the sleeve are coaxial; the inner circle at both ends of the sleeve is provided with a stop, and the fan's air inlet pipe (collecting pipe) and air outlet pipe can be easily connected to the stop.

Description

Technical Field

[0001] This utility model relates to an electric motor for a fan. Background Technology

[0002] The existing motor structure includes a housing with cooling fins, feet, and a junction box. When the motor is used with an axial flow fan, a bracket needs to be welded into the fan housing. When the motor is mounted on the bracket, its position needs to be adjusted so that the motor shaft is centered on the fan housing, making installation inconvenient. Vibrations generated during fan operation can loosen the connection between the motor and the bracket. The feet and junction box protrude asymmetrically from the housing surface, hindering airflow and causing additional power loss, thus reducing fan efficiency. Utility Model Content

[0003] To address the aforementioned problems, this utility model designs an electric motor for fans, which can be easily matched with axial flow fans, improve the strength of the fans, and reduce power loss.

[0004] The technical solution of this utility model is an electric motor for a fan, which includes a housing 3. The housing has a smooth surface. A sleeve 6 is provided on the outer periphery of the housing. The inner diameter of the sleeve is larger than the diameter of the fan impeller. Multiple stiffeners 11 are symmetrically arranged between the sleeve and the housing. The width of the stiffener is smaller than its length. The width direction of the stiffener is parallel to the axis of the electric motor. The sleeve, housing and stiffeners are an integral unit. A stator winding lead hole 9 is provided at one end of the housing. Stops 12 are provided on the inner circles at both ends of the sleeve.

[0005] The beneficial effects of this utility model are that the surface of the motor housing is smooth, that is, the surface of the housing has no heat dissipation fins, no junction box, and no feet, which does not obstruct the airflow of the fan and can reduce the power loss of the fan; the sleeve set on the outer side of the housing can serve as the housing of the fan; the motor housing, stiffening plate and sleeve can be cast into a whole, with high connection strength between them, and will not loosen due to vibration, which can ensure that the housing and sleeve are coaxial; the inner circles at both ends of the sleeve are provided with stop mouths, and the air inlet pipe (collecting pipe) and air outlet pipe of the fan can be easily connected to the stop mouths. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model.

[0007] Figure 2 for Figure 1 The right view.

[0008] Attached diagram symbols: 1-First end cover, 2-Main shaft, 3-Casing, 4-Stator, 5-Rotor, 6-Sleeve, 7-Bearing, 8-Second end cover, 9-Lead hole, 10-Cable socket, 11-Firming plate, 12-Stop, 13-Outlet duct, 14-Impeller, 15-Inlet duct. Detailed Implementation

[0009] An electric motor for a fan includes a housing 3, a stator 4 fixedly inserted into the inner wall of the housing, a rotor 5 inserted into the stator, and the two ends of the rotor's main shaft connected to a first end cover 1 and a second end cover 8 respectively via bearings 7. The first end cover 1 is connected to the left end of the housing, and the second end cover 8 is connected to the right end of the housing.

[0010] The surface of the casing is smooth, meaning there are no heat dissipation fins or junction boxes on the surface of the casing. A sleeve 6 is provided on the outer periphery of the casing. The inner diameter of the sleeve is larger than the diameter of the impeller 14 of the fan. Multiple stiffeners 11 are symmetrically arranged between the sleeve and the casing. The width of the stiffener is smaller than the length of the stiffener. The width direction of the stiffener is parallel to the axis of the motor. The sleeve, casing and stiffeners are a whole (formed by casting process). A stator winding lead hole 9 is provided at one end of the casing. Stops 12 are provided on the inner circles of both ends of the sleeve.

[0011] The width of the stiffening plate is equal to the length of the motor rotor 5, so that the weight of the motor is evenly borne by the stiffening plate.

[0012] The stator winding leads pass through the outlet hole and connect to the external power supply. To facilitate the connection between the stator winding leads and the external power supply, a cable socket 10 is installed in the outlet hole, and the stator winding leads are connected to the pins of the cable socket.

[0013] When the motor and the fan are installed together, the impeller 14 is connected to the right end of the motor shaft, the air inlet pipe 15 is connected to the stop at the left end of the sleeve, and the air outlet pipe 13 is connected to the stop at the right end of the sleeve. The sleeve set around the outer side of the casing can serve as the casing of the fan. The sleeve can be connected to the base, making the assembly of the fan very convenient.

Claims

1. An electric motor for a fan, comprising a housing (3), characterized in that, The surface of the casing is smooth. A sleeve (6) is provided on the outer periphery of the casing. The inner diameter of the sleeve is larger than the diameter of the fan impeller. Multiple stiffeners (11) are symmetrically arranged between the sleeve and the casing. The width of the stiffener is smaller than the length of the stiffener. The width direction of the stiffener is parallel to the axis of the motor. The sleeve, casing and stiffener are a whole. A stator winding lead hole (9) is provided at one end of the casing. Stops (12) are provided on the inner circles at both ends of the sleeve.

2. The electric motor for a fan according to claim 1, characterized in that, The width of the stiffener (11) is equal to the length of the rotor (5) of the motor.

3. The electric motor for a fan according to claim 1, characterized in that, A cable socket (10) is installed in the outlet hole (9).

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