Ultra-thin four-pole series wound motor for household blender

Abstract

An ultra-thin four-pole series wound motor for a household blender, relating to the technical field of ultra-thin series wound motors, and comprising a mount (1), wherein a stator (2) is mounted on the mount (1), four winding coils (3) are provided on the stator (2), a steel shaft (4) is rotatably connected onto the mount (1) by means of a bearing, and a rotor (5) is mounted on the steel shaft (4). By providing four winding coils, the number of winding coils is increased, thereby increasing the strength of a generated magnetic field; at the moment of starting, the stronger magnetic field and appropriate current are generated, resulting in higher starting torque, so that the motor can have a greater output in a smaller volume, achieving miniaturization of external dimensions of household high-power blenders and reducing product costs.

Description

A household blender with an ultra-thin four-pole series motor Technical Field

[0001] This utility model relates to the field of ultra-thin series motor technology, and in particular to an ultra-thin four-pole series motor for household mixers. Background Technology

[0002] A four-pole series-wound motor is a type of DC motor. Its stator (stationary part) has four magnetic poles, consisting of two pairs of poles (NS, NS). Series winding means that its field winding (the winding that generates the magnetic field) and armature winding (the winding that generates the induced electromotive force and carries the current) are connected in series. According to the law of electromagnetic induction, when current flows through the armature winding, the armature winding experiences an Ampere force in the magnetic field, thereby generating torque and causing the rotor (rotating part) of the motor to rotate. Because it is a series-wound motor, the armature current is also the field current. When the load changes, the change in current causes a change in the magnetic field strength, which in turn affects the motor's speed and torque characteristics.

[0003] Currently, the technology of two-pole single-phase series motors for high-power household mixers is mature. However, existing two-pole single-phase series motors cannot output high torque with a structure of relatively similar size. In mixers, space is limited, resulting in motors with lower torque and insufficient power that can be installed inside. High-power mixers are limited by the size of the internal high-power motor, making them larger overall and greatly increasing the costs of materials, transportation, warehousing, and logistics. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes an ultra-thin four-pole series motor for household mixers, which more precisely solves the problems described above.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model proposes an ultra-thin four-pole series motor for household mixers, including a mounting bracket, a stator mounted on the mounting bracket, four winding coils disposed on the stator, and a steel shaft rotatably connected to the mounting bracket via bearings, with a rotor mounted on the steel shaft.

[0007] Furthermore, the mounting bracket includes an upper bracket and a lower bracket, the stator includes a base, the base is fixedly connected to the upper bracket and the lower bracket, an upper support frame and a lower support frame are installed on the inner side of the base, the upper support frame and the lower support frame are located between the upper bracket and the lower bracket, and each of the upper support frame and the lower support frame is provided with four placement slots, and the four winding coils are respectively installed in the four placement slots, and the four winding coils are connected in series.

[0008] Furthermore, the outer diameter of the stator core is 80mm-160mm.

[0009] Furthermore, the outer diameter of the rotor is 50mm-100mm.

[0010] Furthermore, the other end of the steel shaft is provided with a mounting groove, and a vortex fan is installed at the lower end of the steel shaft.

[0011] Furthermore, a bakelite board is installed on the lower support, and four carbon brush assemblies are installed on the bakelite board. The steel shaft passes through the bakelite board, and a commutator is installed on the steel shaft. The commutator cooperates with the carbon brush assemblies. An insulating sticker is provided on one side of the bakelite board. The thickness of the bakelite board is 1.5-2.0mm, and the thickness of the insulating sticker is 0.8-1.5mm.

[0012] Furthermore, a plurality of wire harness structures are fixedly connected to the lower surface of the lower support frame. The wire harness structure includes a vertical plate, which is fixedly connected to the lower support frame. A plurality of wire harness clips are fixedly connected to one side of the vertical plate. The wire harness clips are arc-shaped and elastic.

[0013] Furthermore, multiple cable ties are wound around the lower support frame. The cable ties are used to bundle the wires, and one of the cable ties is wrapped with a wire bundle tube, which is used to gather multiple wires.

[0014] Furthermore, one end of the steel shaft is provided with a threaded hole for fixing external devices.

[0015] Furthermore, the steel shaft has snap-fit ​​surfaces on both sides of one end, and the two snap-fit ​​surfaces are located on both sides of the threaded hole.

[0016] The beneficial effects of this utility model are:

[0017] This invention proposes an ultra-thin four-pole series motor for household mixers. By setting four winding coils in a ring array, the magnetic field strength is increased due to the increased number of winding coils. In a series motor, the increased number of excitation winding coils strengthens the magnetic field. At startup, a larger magnetic field and suitable current are generated, resulting in a greater starting torque. This allows the motor to have a larger output in a smaller size, meeting the requirements for miniaturization of high-power household mixers and reducing product costs.

[0018] A household mixer ultra-thin four-pole series motor reduces the overall height of the carbon brush assembly by mounting a bakelite board on which individual carbon brush assemblies are fixed, and then fixed to a lower bracket. This saves internal space and reduces the size of the motor. The individual carbon brush assemblies are insulated, and the insulated bakelite board is reinforced with insulating paper to ensure creepage distance and electrical safety distance, achieving safe insulation and thus improving the motor's safety. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the structure of this utility model;

[0020] Figure 2 is a schematic diagram of the structure of the lower support of this utility model;

[0021] Figure 3 is a schematic diagram of the carbon brush assembly of this utility model;

[0022] Figure 4 is a schematic diagram of the winding coil of this utility model.

[0023] The attached diagram is labeled as follows: 1. Mounting bracket; 101. Upper bracket; 102. Lower bracket; 2. Stator; 21. Base; 22. Upper support frame; 23. Lower support frame; 3. Winding coil; 4. Steel shaft; 5. Rotor; 6. Mounting slot; 7. Bakelite board; 8. Carbon brush assembly; 9. Commutator; 11. Wire harness structure; 111. Vertical plate; 112. Wire harness clip; 12. Cable tie; 13. Wire harness tube. Detailed Implementation

[0024] To more clearly and completely illustrate the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, will provide further details.

[0025] Please refer to Figures 1-4. This utility model proposes an ultra-thin four-pole series motor for a household mixer. Its features include a mounting frame 1, on which a stator 2 is mounted. The stator 2 has four winding coils 3. A steel shaft 4 is rotatably connected to the mounting frame 1 via bearings. One end of the steel shaft 4 has a threaded hole for fixing external components, primarily for fixing rotating blades. Two snap-fit ​​surfaces are located on both sides of one end of the steel shaft 4, also for fixing the rotating blades and enhancing the fixing force of the steel shaft 4. A rotor 5 is mounted on the steel shaft 4. The mounting frame 1 includes an upper bracket 101 and a lower bracket 102. The stator 2 includes a base 21, which is fixedly connected to the upper bracket 101 and the lower bracket 102. An upper support frame 22 and a lower support frame 23 are mounted on the inner side of the base 21, located between the upper bracket 101 and the lower bracket 102. Each of the four mounting slots on the 23 is equipped with four winding coils 3, which are installed in the four mounting slots respectively. The four winding coils 3 are connected in series. The outer diameter of the stator core 2 is 80mm-160mm, and the outer diameter of the rotor 5 is 50mm-100mm. This device sets four sets of winding coils 3 in a small mounting frame 1. The four winding coils 3 are arranged in a ring array, forming two south poles and two north poles of magnetic field. The winding coils 3 are connected in series. When the number of winding coils 3 increases, according to Ampere's circuital law, the magnetic field strength will increase for a given current. In a series-wound motor, the increase of the excitation winding coils 3 will make the magnetic field stronger. In terms of torque, at the moment of startup, due to the generation of a larger magnetic field and a suitable current, there will be a larger starting torque, which allows the motor to have a larger output in a smaller volume. This meets the requirements of miniaturization of the appearance size of household high-power mixers and reduces the cost of products in terms of materials, transportation, warehousing and logistics.

[0026] As shown in Figure 2, the other end of the steel shaft 4 is provided with a mounting groove 6. A vortex fan is installed at the lower end of the steel shaft 4. The vortex fan is not shown in the figure. Since the winding coil 3 is added inside the motor, more heat will be generated during use. Therefore, when the steel shaft 4 rotates, it drives the bottom vortex fan to rotate together. The vortex fan generates a large flow negative pressure, and generates hot and cold air convection to cool the rotor 5 and stator 2. This is beneficial to the cooling of the motor and avoids the motor efficiency from being too high, which would lead to a decrease in output power and horsepower.

[0027] As shown in Figures 3 and 4, a bakelite board 7 is mounted on the lower bracket 102, and four carbon brush assemblies 8 are mounted on the bakelite board 7. A steel shaft 4 passes through the bakelite board 7, and a commutator 9 is mounted on the steel shaft 4. The commutator 9 cooperates with the carbon brush assemblies 8. An insulating sticker is provided on one side of the bakelite board 7. The thickness of the bakelite board 7 is 1.5-2.0mm, and the thickness of the insulating sticker is 0.8-1.5mm. The four carbon brush assemblies 8 are fixed on the bakelite board 7 and then fixed on the lower bracket 102 to reduce the overall height of the carbon brush assemblies 8, save internal space of the motor, and reduce the size of the motor. The four carbon brush assemblies 8 are insulated, and the insulating bakelite board 7 is reinforced with insulating paper to ensure creepage distance and electrical safety distance, thereby achieving safe insulation and improving the safety of the motor.

[0028] As shown in Figures 2 and 4, multiple wire-bundling structures 11 are fixedly connected to the lower surface of the lower support frame 23. Each wire-bundling structure 11 includes a vertical plate 111, which is fixedly connected to the lower support frame 23. Multiple wire-bundling clips 112 are fixedly connected to one side of the vertical plate 111. The wire-bundling clips 112 are arc-shaped and elastic. Multiple cable ties 12 are wrapped around the lower support frame 23. The cable ties 12 are used to bundle wires. One of the cable ties 12 has a wire-bundling tube 13 wrapped around it. The wire-bundling tube 13 is used to bundle multiple wires. The wire-bundling clips 112, cable ties 12, and wire-bundling tube 13 are all used to fix and bind the wires. The wire-bundling tube 13 is relatively wide and can hold multiple wires. When the wires are long, they can be wrapped around the lower support frame 23. The cable ties 12 and wire-bundling clips 112 are used to fix the wires at various positions, making the wires more organized and saving space.

[0029] Working principle: Four sets of winding coils 3 are set in the mounting frame 1. The four winding coils 3 are arranged in a ring array, forming two south poles and two north poles of magnetic field. The winding coils 3 are connected in series. When the number of winding coils 3 increases, according to Ampere's circuital law, the magnetic field strength generated for a given current will increase. Due to the generation of a larger magnetic field and a suitable current, there will be a larger starting torque. The four carbon brush assemblies 8 are fixed on the bakelite board 7 and then fixed on the lower bracket 102 to reduce the overall height of the carbon brush assembly 8, save internal space of the motor and reduce the size of the motor. When the steel shaft 4 rotates, it drives the bottom eddy fan to rotate together. The eddy fan generates a large flow negative pressure, and generates hot and cold air convection to cool the rotor 5 and stator 2. The wires are wound under the lower support frame 23 and fixed at various positions by cable ties 12 and wire clamps 112.

[0030] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A thin-type four-pole series motor for a household blender, characterized in that, It includes a mounting frame, on which a stator is mounted, and four winding coils are provided on the stator. A steel shaft is rotatably connected to the mounting frame via bearings, and a rotor is mounted on the steel shaft.

2. The ultra-thin four-pole series motor for household mixers according to claim 1, characterized in that, The mounting bracket includes an upper bracket and a lower bracket. The stator includes a base. The base is fixedly connected to the upper bracket and the lower bracket. An upper support frame and a lower support frame are installed on the inner side of the base. The upper support frame and the lower support frame are located between the upper bracket and the lower bracket. Each of the upper support frame and the lower support frame is provided with four placement slots. The four winding coils are respectively installed in the four placement slots and are connected in series.

3. The ultra-thin four-pole series motor for household mixers according to claim 1, characterized in that, The outer diameter of the stator core is 80mm-160mm.

4. The ultra-thin four-pole series motor for household mixers according to claim 1, characterized in that, The outer diameter of the rotor is 50mm-100mm.

5. The ultra-thin four-pole series motor for household mixers according to claim 3, characterized in that, The other end of the steel shaft is provided with a mounting groove, and a vortex fan is installed at the lower end of the steel shaft.

6. The ultra-thin four-pole series motor for household mixers according to claim 2, characterized in that, A bakelite board is mounted on the lower support, and four carbon brush assemblies are mounted on the bakelite board. A steel shaft passes through the bakelite board, and a commutator is mounted on the steel shaft. The commutator cooperates with the carbon brush assemblies. An insulating sticker is provided on one side of the bakelite board. The thickness of the bakelite board is 1.5-2.0 mm, and the thickness of the insulating sticker is 0.8-1.5 mm.

7. The ultra-thin four-pole series motor for household mixers according to claim 2, characterized in that, The lower surface of the lower support frame is fixedly connected to multiple wire harness structures. Each wire harness structure includes a vertical plate, which is fixedly connected to the lower support frame. Multiple wire harness clips are fixedly connected to one side of the vertical plate. The wire harness clips are arc-shaped and elastic.

8. The ultra-thin four-pole series motor for household mixers according to claim 7, characterized in that, Multiple cable ties are wound around the lower support frame. The cable ties are used to bundle the wires. One of the cable ties is wrapped with a wire bundle tube, which is used to gather multiple wires.

9. The ultra-thin four-pole series motor for household mixers according to claim 1, characterized in that, One end of the steel shaft is provided with a threaded hole for fixing external devices.

10. The ultra-thin four-pole series motor for household mixers according to claim 9, characterized in that, The steel shaft has two snap-fit ​​surfaces on both sides of one end, and the two snap-fit ​​surfaces are located on both sides of the threaded hole.

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