Permanent magnet direct current motor with heat-resistant function

Abstract

The utility model discloses a permanent-magnet direct-current motor with a heat-resistant function, which belongs to the technical field of permanent-magnet direct-current motors and is characterized in that a stator is mounted on the inner wall of a casing, a plurality of windings are arranged on the inner wall of the stator, and a rotor is rotatably arranged in the middle of each winding; a cooling frame is installed on the outer wall of the machine shell, a cooling cavity is formed between the cooling frame and the outer wall of the machine shell, multiple sets of air inlet bins are further arranged on the outer wall of the machine shell, and main body parts of the air inlet bins are located in the cooling cavity; an outer air inlet groove is formed in the outer wall of the cooling cavity, an inner air inlet communicated with the air inlet bin is formed in the outer wall of the machine shell, and multiple sets of exhaust ports are formed in the top of the top cover. According to the utility model, double cooling can be carried out through the cooling cavity and the air inlet bin, and external lower air can firstly enter the air inlet bin to be cooled and then enter the interior of the shell through the inner air inlet. Through the cooperation of the sliding seat and the sliding block, the stability and the convenience of the stator during installation can be improved, and the practicability and the stability of the permanent magnet direct current motor are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet DC motors, in particular to a permanent magnet DC motor with a heat-resistant function. Background Art

[0002] Permanent magnet DC motors can be divided into permanent magnet brushless DC motors and permanent magnet brushed DC motors according to whether they have brushes or not. Permanent magnet DC motors are DC motors that use permanent magnets to create a magnetic field. Permanent magnet DC motors are widely used in various portable electronic devices or appliances, such as recorders, VCD players, record players, electric massagers and various toys. They are also widely used in automobiles, motorcycles, hand dryers, electric bicycles, battery vehicles, ships, aviation, machinery and other industries. They are also widely used in some high-tech products, such as video recorders, copiers, cameras, mobile phones, precision machine tools, bank money counters, banknote bundling machines, etc.

[0003] Announcement No.: CN220172959U discloses a permanent magnet DC motor suitable for high speed and low consumption of garage doors, specifically related to the field of garage door motors, including a mounting seat, the outer wall of the mounting seat is fixedly connected with a gusset plate, the interior of the gusset plate is penetrated and connected with an extension bolt, a bearing on one side of the mounting seat is connected with an operating hand wheel, the output end of the operating hand wheel is fixedly connected with a bidirectional threaded rod, the outer wall of the bidirectional threaded rod is threadedly connected with a threaded movable cylinder, the outer wall of the threaded movable cylinder is fixedly connected with a slide rod, one end of the slide rod is fixedly connected with a mounting arc plate, a permanent magnet DC motor assembly is arranged inside the mounting seat, and the interior of the permanent magnet DC motor assembly includes a drive motor, a reducer and a lubrication buffer bin. The utility model facilitates the rotation of the bidirectional threaded rod by rotating the operating hand wheel, and the mounting arc plate is close to the permanent magnet DC motor assembly for clamping and installation, so that it is suitable for garage doors of different models, and the motor is used for winding operation.

[0004] The permanent magnet DC motors in the above-mentioned comparative documents have a single heat dissipation structure, and the internal heat is not easy to be discharged, which will affect the service life of the motor after long-term use. Therefore, a permanent magnet DC motor with heat-resistant function is designed here to solve the above-mentioned problem. Utility Model Content

[0005] The utility model aims to provide a permanent magnet DC motor with heat resistance function in order to solve the problems that the traditional permanent magnet DC motor has a single heat dissipation structure, the internal heat is not easy to be discharged, and the service life of the motor will be affected after long-term use.

[0006] To achieve the above-mentioned purpose, the technical solution of the utility model is: a permanent magnet DC motor with heat-resistant function, including a casing and a top cover, a stator is installed on the inner wall of the casing, a plurality of windings are arranged on the inner wall of the stator, and a rotor is rotatably arranged in the middle of the winding; a cooling frame is installed on the outer wall of the casing, a cooling cavity is formed between the cooling frame and the outer wall of the casing, a plurality of air intake bins are also arranged on the outer wall of the casing, and the main part of the air intake bins is located in the cooling cavity; an external air intake groove is opened on the outer wall of the cooling cavity, an internal air intake port connected to the air intake bin is opened on the outer wall of the casing, and a plurality of exhaust ports are opened on the top of the top cover.

[0007] As a further solution of the utility model: a liquid inlet pipe and a liquid discharge pipe are arranged on the cooling frame.

[0008] As a further solution of the utility model: a bottom plate is arranged at the bottom of the housing, and a plurality of sets of screw holes are arranged on the bottom plate.

[0009] As a further solution of the utility model: an upper convex ring is provided at the bottom of the top cover, a lower convex ring matching therewith is provided at the top of the casing, a plurality of groups of locking fans are provided at the bottom of the upper convex ring, a plurality of groups of first slots matching therewith are provided on the lower convex ring, the locking fan comprises a vertical plate and an arc-shaped plate, a second slot matching therewith is provided on the side of the first slot.

[0010] As a further solution of the utility model: a plurality of groups of sliding blocks are arranged on the inner wall of the housing, and a plurality of groups of sliding seats cooperating with the sliding blocks are arranged on the outer wall of the stator.

[0011] As a further solution of the utility model: a plurality of groups of bolts are threadedly mounted on the upper convex ring and the lower convex ring.

[0012] As a further solution of the utility model: valves are provided on the liquid inlet pipe and the liquid discharge pipe.

[0013] The utility model provides a permanent magnet DC motor with heat resistance function through improvement, which has the following improvements and advantages compared with the prior art:

[0014] The utility model can perform gas-liquid dual cooling on the device through the cooling chamber and the air inlet bin, wherein the coolant is injected into the cooling chamber through the liquid inlet pipe, so that the outside of the casing can be efficiently cooled. In addition, the hot air density inside the device is relatively small, and it will be discharged from the exhaust port. The lower air outside will first enter the air inlet bin for cooling, and then enter the inside of the casing through the internal air inlet. When the device needs to be disassembled, first insert the locking fan into the first slot, and then rotate the top cover clockwise, and the locking is completed when the arc plate is inserted into the second slot. The cooperation of the slide seat and the slider can improve the stability and convenience of the stator installation, which improves the practicality and stability of the permanent magnet DC motor with heat resistance function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further explained below in conjunction with the accompanying drawings and embodiments:

[0016] Figure 1 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 2 It is a three-dimensional structural diagram of the interior of the utility model;

[0018] Figure 3 It is a three-dimensional structural diagram of the top cover in the utility model;

[0019] Figure 4 It is a three-dimensional structural diagram of the rotor in the utility model;

[0020] Figure 5 It is a cross-sectional view of the utility model.

[0021] Description of reference numerals:

[0022] 1. Casing; 2. Top cover; 3. Bottom plate; 4. Cooling frame; 5. Cooling chamber; 6. Liquid inlet pipe; 7. Liquid discharge pipe; 8. Screw hole; 9. Locking fan; 10. Vertical plate; 11. Arc plate; 12. First slot; 13. Second slot; 14. Upper convex ring; 15. Lower convex ring; 16. Exhaust port; 17. Air inlet bin; 18. Inner air inlet; 19. Outer air inlet slot; 20. Stator; 21. Sliding seat; 22. Winding; 23. Rotor; 24. Slider. DETAILED DESCRIPTION

[0023] The following will be combined with the attached Figures 1 to 5 The utility model is described in detail, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] The utility model provides a permanent magnet DC motor with heat resistance function through improvement, such as Figure 1-Figure 5 As shown, a permanent magnet DC motor with heat resistance function includes a casing 1 and a top cover 2, a stator 20 is installed on the inner wall of the casing 1, a plurality of windings 22 are arranged on the inner wall of the stator 20, and a rotor 23 is rotatably arranged in the middle of the winding 22; a cooling frame 4 is installed on the outer wall of the casing 1, a cooling cavity 5 is formed between the cooling frame 4 and the outer wall of the casing 1, a plurality of air intake bins 17 are also arranged on the outer wall of the casing 1, and the main part of the air intake bin 17 is located in the cooling cavity 5; an outer air intake groove 19 is opened on the outer wall of the cooling cavity 5, an inner air intake port 18 connected with the air intake bin 17 is opened on the outer wall of the casing 1, a plurality of exhaust ports 16 are opened on the top of the top cover 2, and a liquid inlet pipe 6 and a liquid discharge pipe 7 are arranged on the cooling frame 4.

[0025] The utility model can perform gas-liquid dual cooling on the device through the cooling chamber 5 and the air inlet bin 17, wherein the cooling liquid is injected into the cooling chamber 5 through the liquid inlet pipe 6, and the outside of the housing 1 can be efficiently cooled. In addition, the hot air density inside the device is relatively low, and it will be discharged from the exhaust port 16. The low-temperature air outside will first enter the air inlet bin 17 for cooling, and then enter the inside of the housing 1 through the inner air inlet 18. The cooperation of the slide seat 21 and the slider 24 can improve the stability and convenience of the stator 20 during installation, which improves the practicality and stability of the permanent magnet DC motor with heat-resistant function.

[0026] See attached Figure 1 -Attached Figure 2 A bottom plate 3 is provided at the bottom of the housing 1, and a plurality of screw holes 8 are provided on the bottom plate 3.

[0027] In this embodiment, in order to facilitate installation of the device at a desired location, a plurality of screw holes 8 are provided on the bottom plate 3 .

[0028] See attached Figure 2 -Attached Figure 3 An upper convex ring 14 is provided at the bottom of the top cover 2, and a lower convex ring 15 cooperating therewith is provided at the top of the casing 1. A plurality of locking fans 9 are provided at the bottom of the upper convex ring 14, and a plurality of first slots 12 cooperating with the locking fans 9 are provided on the lower convex ring 15. The locking fan 9 includes a vertical plate 10 and an arc plate 11. A second slot 13 cooperating with the arc plate 11 is provided on the side of the first slot 12.

[0029] In this embodiment, in order to facilitate the rapid positioning and installation of the top cover 2, multiple sets of locking fans 9 are provided at the bottom of the upper convex ring 14. When the device needs to be disassembled, the locking fan 9 is first inserted into the first slot 12, and then the top cover 2 is rotated clockwise, and the locking is completed when the arc plate 11 is inserted into the second slot 13.

[0030] See attached Figure 2 and attached Figure 4 A plurality of groups of sliders 24 are arranged on the inner wall of the housing 1 , and a plurality of groups of slide seats 21 cooperating with the sliders 24 are arranged on the outer wall of the stator 20 .

[0031] In this embodiment, in order to further facilitate the disassembly and assembly of the stator 20 , a sliding seat 21 and a sliding block 24 are designed.

[0032] See attached Figure 1 -Attached Figure 3 A plurality of bolts are threadedly mounted on the upper convex ring 14 and the lower convex ring 15.

[0033] In this embodiment, in order to further improve the stability and prevent the top cover 2 from loosening due to excessive vibration, a plurality of groups of bolts (not shown) are threadedly mounted on the upper convex ring 14 and the lower convex ring 15 .

[0034] See attached Figure 1 and attached Figure 5 Valves are provided on both the liquid inlet pipe 6 and the liquid discharge pipe 7.

[0035] In this embodiment, in order to further control the circulation of the cooling liquid, valves (not shown) are provided on the liquid inlet pipe 6 and the liquid outlet pipe 7 .

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A permanent magnet DC motor with heat resistance, characterized in that: The invention comprises a casing (1) and a top cover (2), wherein a stator (20) is mounted on the inner wall of the casing (1), a plurality of windings (22) are arranged on the inner wall of the stator (20), and a rotor (23) is rotatably arranged in the middle of the winding (22); a cooling frame (4) is mounted on the outer wall of the casing (1), a cooling chamber (5) is formed between the cooling frame (4) and the outer wall of the casing (1), a plurality of air intake bins (17) are also arranged on the outer wall of the casing (1), and the main body of the air intake bins (17) are located in the cooling chamber (5); an outer air intake groove (19) is provided on the outer wall of the cooling chamber (5), an inner air intake port (18) communicating with the air intake bin (17) is provided on the outer wall of the casing (1), and a plurality of air exhaust ports (16) are provided on the top of the top cover (2).

2. The permanent magnet DC motor with heat resistance function according to claim 1, characterized in that: The cooling frame (4) is provided with a liquid inlet pipe (6) and a liquid outlet pipe (7).

3. The permanent magnet DC motor with heat resistance function according to claim 1, characterized in that: A bottom plate (3) is provided at the bottom of the housing (1), and a plurality of groups of screw holes (8) are provided on the bottom plate (3).

4. The permanent magnet DC motor with heat resistance function according to claim 1, characterized in that: An upper convex ring (14) is provided at the bottom of the top cover (2), and a lower convex ring (15) cooperating therewith is provided at the top of the housing (1). A plurality of locking fans (9) are provided at the bottom of the upper convex ring (14), and a plurality of first slots (12) cooperating with the locking fans (9) are provided on the lower convex ring (15). The locking fans (9) include a vertical plate (10) and an arc plate (11), and a second slot (13) cooperating with the arc plate (11) is provided on the side of the first slot (12).

5. The permanent magnet DC motor with heat resistance function according to claim 1, characterized in that: A plurality of groups of sliders (24) are arranged on the inner wall of the housing (1), and a plurality of groups of slide seats (21) cooperating with the sliders (24) are arranged on the outer wall of the stator (20).

6. The permanent magnet DC motor with heat resistance function according to claim 4, characterized in that: The upper convex ring (14) and the lower convex ring (15) are also threadedly mounted with multiple groups of bolts.

7. The permanent magnet DC motor with heat resistance function according to claim 2, characterized in that: Valves are provided on the liquid inlet pipe (6) and the liquid discharge pipe (7).

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