Self-heat-dissipation motor

Abstract

The utility model discloses a self-heat-dissipation motor, which comprises a first support, a second support, a stator connected between the first support and the second support, and a rotor penetrating through the inner cavity of the stator, rotating shafts at two ends of the rotor are respectively and rotatably connected with the first support and the second support, and a commutator is arranged on the rotating shaft in the first support. The first support is provided with an electric brush corresponding to the commutator, and the rotating shaft in the second support is provided with fan blades. When the motor is electrified to work, the stator generates a rotating magnetic field to drive the rotor to rotate. The rotation of the rotor drives the fan blades on the rotating shaft to rotate, and the fan blades generate airflow when rotating to accelerate air convection in the motor and take away heat generated by the stator and the rotor. The fan blades are located in the second support and face the stator and the rotor, no support blocks exist between the fan blades, and the heat dissipation performance is better. The fan blade is composed of the two fan blade parts which are oppositely spliced, so that the fan blade is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the field of motors, in particular to a self-heating motor. Background Art

[0002] The motors used in kitchen machines (such as soymilk machines, wall breaking machines, etc.) are generally single-phase motors, which include a front bracket, a rear bracket, a stator connected between the front bracket and the rear bracket, and a rotor that passes through the inner cavity of the stator. The rotating shafts at both ends of the rotor are rotatably connected to the front bracket and the rear bracket respectively, and the rotating shaft at at least one end passes through the corresponding bracket. During the use of the motor, a part of the electrical energy will always be converted into internal energy, causing the motor to heat up, so fan blades are installed on the rotating shaft of the motor for heat dissipation. The fan blades and the rotating shaft are generally connected in a set, and the two are tightly combined through an interference fit.

[0003] In the prior art, the fan blades are usually installed on the rotating shaft part extending from the motor bracket. This design facilitates the installation and removal of the fan blades. However, since the fan blades are installed outside the bracket and the bracket faces the stator cavity, this design has a significant defect, that is, the bracket will hinder the ventilation of the stator cavity, resulting in a decrease in heat dissipation performance. Specifically, the structure of the bracket not only limits the path of air flow, but also increases the resistance of air circulation, making it difficult for the heat inside the motor to dissipate quickly.

[0004] In summary, although the fan blade installation method in the prior art is easy to install and disassemble, it has problems of obstructed ventilation and reduced heat dissipation performance in actual use. Utility Model Content

[0005] The main purpose of the utility model is to provide a self-heating motor, aiming to improve the heat dissipation performance while facilitating the disassembly and assembly of the fan blades.

[0006] The utility model proposes a self-heating motor, including a first bracket, a second bracket, a stator connected between the first bracket and the second bracket, and a rotor passing through the inner cavity of the stator. The rotating shafts at both ends of the rotor are rotatably connected to the first bracket and the second bracket respectively. A commutator is installed on the rotating shaft in the first bracket. A brush corresponding to the commutator is installed on the first bracket. A fan blade is installed on the rotating shaft in the second bracket. The rotor drives the fan blade to rotate. The fan blade is composed of two relatively spliced ​​fan blade components. The fan blade component includes an arc-shaped surrounding wall adapted to the rotating shaft. The two arc-shaped surrounding walls are connected and fixed to the rotating shaft.

[0007] Preferably, a mortise and tenon structure for relative positioning is provided between the arc-shaped surrounding wall and the rotating shaft.

[0008] Preferably, the two blade components are connected and fixed by screws.

[0009] Preferably, the opposite ends of the two arc-shaped surrounding walls are respectively provided with mutually matching plug-in blocks and plug-in slots, and the plug-in blocks and the plug-in slots are respectively provided with relative threaded connection holes, the plug-in blocks are placed on the plug-in slots, and screws are installed in the relative threaded connection holes to connect the two fan blade components.

[0010] Preferably, it further comprises a temperature control unit, which is wrapped in an insulating heat shrink sleeve and bound to the stator winding of the stator.

[0011] The beneficial effects of the self-heating motor of the utility model are:

[0012] The utility model of the self-heating motor comprises a first bracket, a second bracket, a stator connected between the first bracket and the second bracket, and a rotor passing through the inner cavity of the stator. The rotating shafts at both ends of the rotor are respectively connected to the first bracket and the second bracket for rotation. A commutator is installed on the rotating shaft in the first bracket. A brush corresponding to the commutator is installed on the first bracket. A fan blade is installed on the rotating shaft in the second bracket. When the motor is powered on, the stator generates a rotating magnetic field to drive the rotor to rotate. The rotation of the rotor drives the fan blades on the rotating shaft to rotate. When the fan blades rotate, airflow is generated to accelerate air convection inside the motor and take away the heat generated by the stator and the rotor. The fan blades are located in the second bracket, facing the stator and the rotor, without any bracket blocking them, and the heat dissipation performance is better.

[0013] The fan blade is composed of two relatively spliced ​​fan blade parts, and the fan blade parts include an arc-shaped surrounding wall adapted to the rotating shaft, and the two arc-shaped surrounding walls are connected and fixed to the rotating shaft. Different from the existing assembly method of the fan blade and the rotating shaft, the fan blade does not need to be installed or pulled out from the end of the rotating shaft, so that the fan blade is installed in the bracket, and the bracket will not block the installation of the fan blade, which is convenient for the disassembly and assembly of the fan blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view of the self-heating motor according to an embodiment of the utility model.

[0015] Figure 2 It is a left side view of the self-heating motor according to an embodiment of the utility model.

[0016] Figure 3 It is a schematic diagram of the structural decomposition of the fan blades of the self-heating motor according to an embodiment of the utility model.

[0017] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] Reference Figures 1 to 3 , an embodiment of the self-heating motor of the utility model is proposed:

[0020] A self-heating motor includes a first bracket 1, a second bracket 2, a stator 3 connected between the first bracket 1 and the second bracket 2, and a rotor 4 passing through the inner cavity of the stator 3. The rotating shafts at both ends of the rotor 4 are rotatably connected to the first bracket 1 and the second bracket 2 respectively. A commutator 5 is installed on the rotating shaft in the first bracket 1. A brush corresponding to the commutator 5 is installed on the first bracket 1. Another rotating shaft 41 extends from the second bracket 2. A fan blade 6 is installed on the rotating shaft in the second bracket 2, and the rotor 3 drives the fan blade 6 to rotate. The fan blade 6 is composed of two relatively spliced ​​fan blade components 61. The fan blade component 61 includes an arc-shaped surrounding wall adapted to the rotating shaft, and the two arc-shaped surrounding walls are connected and fixed in contact with the rotating shaft.

[0021] The first bracket 1 and the second bracket 2 are the main supporting structures of the motor, which are respectively located at the two ends of the motor to support the stator and the rotor.

[0022] The stator 3 is the stationary part of the motor, which generates a magnetic field through the principle of electromagnetic induction. The stator 3 is made of stacked silicon steel sheets, and copper wire windings 31 are embedded in the slots of the silicon steel sheets.

[0023] The rotor 4 is the rotating part of the motor and is located in the inner cavity of the stator 3. The core material of the rotor 3 is usually an iron core, and the outside is coated with copper or aluminum windings. The rotation of the rotor 3 is supported by the rotating shafts at both ends, and the rotating shafts are connected to the first bracket 1 and the second bracket 2 through bearings.

[0024] The rotating shaft is a key part for transmitting mechanical energy, and a commutator 5 is installed on one end of the rotating shaft. The commutator 5 completes the commutation of the current through friction contact with the brush to ensure the normal operation of the motor.

[0025] The fan blade 6 is composed of two relatively spliced ​​fan blade parts 61. Each fan blade part 61 includes an arc-shaped surrounding wall adapted to the rotating shaft, and the two arc-shaped surrounding walls are connected and fixed to the rotating shaft to form a complete fan blade structure. Different from the existing way of fitting the fan blades and the rotating shaft, the fan blades do not need to be installed or pulled out from the end of the rotating shaft. In this way, the fan blades are installed in the bracket, and the bracket will not block the installation of the fan blades, which is convenient for the disassembly and assembly of the fan blades. The fan blades 6 generate airflow as the rotor 4 rotates, strengthening the air convection inside and around the motor to achieve an effective heat dissipation effect.

[0026] When the motor is powered on, the stator 3 generates a rotating magnetic field to drive the rotor 4 to rotate. The rotation of the rotor 4 drives the fan blades 6 on the shaft to rotate. When the fan blades 6 rotate, airflow is generated to accelerate air convection inside the motor and take away the heat generated by the stator 3 and the rotor 4. The fan blades 6 are located in the second bracket 2, and the fan blades 6 face the stator 3 and the rotor 4. There is no bracket blocking them, so the heat dissipation performance is better.

[0027] Furthermore, a mortise and tenon structure for relative positioning is provided between the arc-shaped surrounding wall and the rotating shaft. The mortise and tenon structure includes a protrusion 62 provided on the arc-shaped surrounding wall and a groove provided on the rotating shaft, the protrusion 62 corresponds to the groove, and the protrusion 62 is inserted into the corresponding groove, so that the fan blade 6 and the rotating shaft are mutually connected and limited in the circumferential direction, and the rotating shaft drives the fan blade 6 to rotate.

[0028] The two leaf components 61 are connected and fixed by screws. Specifically, the opposite ends of the two arc-shaped surrounding walls are respectively provided with mutually matching plug-in blocks 64 and plug-in slots 63, and the plug-in blocks 64 and the plug-in slots 63 are respectively provided with opposite threaded connection holes. The plug-in blocks 64 are placed on the opposite plug-in slots 63, and screws are installed in the opposite threaded connection holes to connect the two leaf components 61, and the assembly operation is simple.

[0029] The motor is provided with a temperature control unit 7, which is wrapped in an insulating heat shrink sleeve and bound to the winding 31 of the stator 3 by a cable tie. The temperature of the motor is detected by the temperature control unit 7. If the temperature exceeds the set temperature, the motor stops working to protect the motor.

[0030] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A self-heating motor, characterized in that: It includes a first bracket, a second bracket, a stator connected between the first bracket and the second bracket, and a rotor passing through the inner cavity of the stator. The rotating shafts at both ends of the rotor are rotatably connected to the first bracket and the second bracket respectively. A commutator is installed on the rotating shaft located in the first bracket, a brush corresponding to the commutator is installed on the first bracket, and a fan blade is installed on the rotating shaft located in the second bracket. The rotor drives the fan blade to rotate; the fan blade is composed of two relatively spliced ​​fan blade components, and the fan blade component includes an arc-shaped surrounding wall adapted to the rotating shaft, and the two arc-shaped surrounding walls are connected and fixed to the rotating shaft.

2. The self-heating motor according to claim 1, characterized in that: A mortise and tenon structure for relative positioning is provided between the arc-shaped surrounding wall and the rotating shaft.

3. The self-heating motor according to claim 2, characterized in that: The two fan blade components are connected and fixed by screws.

4. The self-heating motor according to claim 3, characterized in that: The opposite ends of the two arc-shaped surrounding walls are respectively provided with matching plug-in blocks and plug-in slots, and the plug-in blocks and the plug-in slots are respectively provided with relative threaded connection holes. The plug-in blocks are placed on the plug-in slots, and screws are installed in the relative threaded connection holes to connect the two fan blade components.

5. The self-cooling motor according to any one of claims 1 to 4, characterized in that: It also includes a temperature control unit, which is wrapped in an insulating heat shrink sleeve and bound to the stator winding of the stator.

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