A DC motor with an external drive structure

Abstract

This utility model relates to the field of motor technology. The externally driven DC motor includes a housing outside the drive structure and a base on the underside of the housing. It also includes a stator, rotor, motor shaft, and bearings inside the drive structure. The stator is externally connected to a drive board via wires. The stator and rotor are housed within the housing. The motor shaft passes through the middle of the housing and base and is connected to them via bearings. This DC motor only requires connecting wires to the stator to the external drive board, making it simple and convenient. Furthermore, this DC motor only needs to be tested using the external drive, solving the problem of numerous steps on the drive board and reducing the risk of damage to electronic components. When the DC motor is powered on, the heat generated by the external drive board does not affect the motor's temperature rise, reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of DC motor technology, and in particular to a DC motor with an external drive structure. Background Technology

[0002] Currently, most DC motors used in ice makers are built-in drive motors. However, built-in drive motors with external rotors present the following problems in existing production processes:

[0003] a. The excessive temperature rise of the drive motor is mainly due to the heat generated by the electronic components on the drive board, which is conducted to the motor housing, resulting in an excessively high overall motor temperature;

[0004] b. The driver board may remain on the production line for too many processes, which may lead to damage to the electronic components on the board;

[0005] c. Because the repair cost of the driver board is relatively high, malfunctions during production will greatly increase the repair cost;

[0006] Therefore, there is an urgent need for a DC motor with an external drive structure to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a DC motor with an external drive structure to solve the technical problems of existing drive motors with built-in drive boards, which cause the motor to overheat and increase maintenance costs.

[0008] This utility model discloses a DC motor with an external drive structure, including a housing outside the drive structure and a base on the lower side of the housing, and a stator, a rotor, a motor shaft and bearings inside the drive structure. The stator is externally connected to a drive plate via wires. The stator and rotor are located inside the housing. The motor shaft passes through the middle of the housing and the base and is connected to the housing and the base via bearings.

[0009] Preferably, the base has a T-shaped structure, with its upper protruding portion located in the middle of the housing.

[0010] Preferably, the bearing includes an upper bearing and a lower bearing, the bearing being a deep groove ball bearing, the upper bearing being a 688ZZ bearing, and the lower bearing being a 608 bearing.

[0011] Preferably, the lower end of the motor shaft is provided with an external thread, and the middle part is provided with a groove. A retaining ring is provided in the groove, and the retaining ring is engaged with the lower side of the lower bearing.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] The DC motor with this external drive structure has the following advantages:

[0014] 1. This DC motor only requires connecting wires to the stator to connect to an external drive board, which is simple and convenient;

[0015] 2. This DC motor only requires testing with an external driver, which solves the problem of multiple processes on the driver board and reduces the risk of damage to electronic components;

[0016] 3. When the DC motor is powered on, the heat generated by the external drive board will not affect the temperature rise of the motor, thus reducing maintenance costs. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0018] Figure 1 This is a schematic diagram of the split structure of an embodiment of a DC motor with an external drive structure according to the present invention;

[0019] Figure 2 This is a side view schematic diagram of an embodiment of a DC motor with an external drive structure according to the present invention;

[0020] Figure 3 yes Figure 2 Cross-sectional view of AA.

[0021] In the diagram: 1. Housing; 2. Base; 3. Stator; 4. Rotor; 5. Motor shaft; 51. External thread; 52. Groove; 6. Wire; 7. Upper bearing; 8. Lower bearing; 9. Snap ring. Detailed Implementation

[0022] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0023] like Figure 1-3As shown, this utility model discloses a DC motor with an external drive structure, including a housing 1 located outside the drive structure and a base 2 located on the lower side of the housing 1. It also includes a stator 3, a rotor 4, a motor shaft 5, bearings, and wires 6 located inside the drive structure. The stator 3 is externally connected to a drive plate via the wires 6. The stator 3 and rotor 4 are located inside the housing 1. The motor shaft 5 passes through the middle of the housing 1 and base 2 and is connected to the housing 1 and base 2 via bearings. The base 2 has a T-shaped structure, with its upper protruding portion located in the middle of the housing 1. The bearings include an upper bearing 7 and a lower bearing 8, both being deep groove ball bearings. The upper bearing 7 is a 688ZZ bearing, and the lower bearing 8 is a 608 bearing. The lower end of the motor shaft 5 has an external thread 51, and the middle has a groove 52. A retaining ring 9 is located in the groove 52 and engages with the lower bearing 8.

[0024] This utility model discloses an externally driven DC motor, mainly comprising a housing 1, a base 2, a stator 3, a rotor 4, a motor shaft 5, an upper bearing 7, and a lower bearing 8. The housing 1 and base 2 are fixedly connected. The base 2 is T-shaped, with its upper end inserted into the bottom of the housing 1 to form the motor body. The stator 3 and rotor 4 are located inside the housing 1. A wire 6 is connected to the stator 3, which in turn connects to an external drive plate to energize the motor. A magnetic ring is also provided on the rotor 4. When energized, the electromagnetic energy of the magnetic ring is converted into mechanical energy to drive the motor shaft 5 to rotate. The upper bearing 7 and lower bearing 8 are respectively provided at the upper and middle parts of the motor shaft 5 to ensure its rotation. A retaining ring 9 in the middle of the motor shaft 5 is engaged with the lower bearing 8 to ensure the stability of the motor shaft 5 installation. Additionally, the lower end of the motor shaft 5 is provided with an external thread 51, which connects to a geared motor and drives the ice maker to rotate.

[0025] The DC motor with an external drive structure of this utility model has the following characteristics:

[0026] 1. This DC motor only requires connecting wires 6 to the stator 3 of the motor to connect to the external drive board, which is simple and convenient;

[0027] 2. This DC motor only requires testing with an external driver, which solves the problem of multiple processes on the driver board and reduces the risk of damage to electronic components;

[0028] 3. When the DC motor is powered on, the heat generated by the external drive board will not affect the temperature rise of the motor, thus reducing maintenance costs.

[0029] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A DC motor with an external drive structure, characterized in that: The device includes a housing located outside the drive structure and a base located on the lower side of the housing. It also includes a stator, a rotor, a motor shaft, and bearings located inside the drive structure. The stator is externally connected to a drive plate via wires. The stator and rotor are located inside the housing. The motor shaft passes through the middle of the housing and the base and is connected to the housing and the base via bearings.

2. The DC motor with an external drive structure as described in claim 1, characterized in that, The base has a T-shaped structure, with its upper protruding part located in the middle of the casing.

3. The DC motor with an external drive structure as described in claim 1, characterized in that, The bearing includes an upper bearing and a lower bearing. The bearing is a deep groove ball bearing. The upper bearing is a 688ZZ bearing and the lower bearing is a 608 bearing.

4. The DC motor with an external drive structure as described in claim 1, characterized in that, The lower end of the motor shaft is provided with an external thread, and the middle part is provided with a groove. A retaining ring is provided in the groove, and the retaining ring is engaged with the lower side of the lower bearing.

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