Motor

Abstract

The utility model relates to the technical field of motor devices, in particular to a motor, which comprises a shell, a rotor assembly and a fan, the shell comprises an inner sleeve and an outer sleeve sleeved outside the inner sleeve, a fluid air duct is formed between the inner sleeve and the outer sleeve, the rotor assembly comprises a driving shaft, the lower end of the outer sleeve is provided with an accommodating cavity, and the fan is positioned in the accommodating cavity. The fan comprises a body and a mounting sleeve, a mounting hole is formed in the body, the mounting hole is fixedly connected with the mounting sleeve, the driving shaft is inserted into the mounting sleeve, and the driving shaft is sleeved with a bearing and rotationally connected into the inner sleeve through the bearing. Due to the fact that the installation sleeve is arranged, the installation hole needs to be large in size, after the size of the installation hole is enlarged, assembly tolerance in a larger range can be achieved, the requirement for size precision is weakened, at the moment, the installation sleeve is easy to install, and extrusion fracture of the installation hole is not prone to being caused. Meanwhile, the mounting sleeve and the driving shaft are both in regular shapes, the size precision is easy to control in the machining process, and interference fit mounting is facilitated through the inner diameters of the driving shaft and the mounting sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of motor devices, in particular to a motor. Background Art

[0002] A motor is a power component that converts electrical energy into mechanical energy. It is widely used in fields such as hair dryers, electric fans, electric vehicles, and automated production equipment. The motor is mainly composed of a housing, a rotor assembly, a stator assembly, a circuit board, and a cooling fan. The housing includes an inner sleeve and an outer sleeve, the stator assembly includes a rotating shaft, and the cooling fan is mounted on the rotating shaft to dissipate heat from the working motor.

[0003] In existing motors, the cooling fan includes a hub and fan blades. The fan blades are evenly distributed on the outer wall of the hub. A mounting hole is provided at the center of the hub. The rotating shaft on the rotor assembly is directly inserted into the mounting hole to achieve a fixed connection with the fan. When the motor is working, the rotating shaft rotates, and the rotating shaft drives the fan to rotate after the rotation, thereby achieving heat dissipation and cooling of the motor.

[0004] However, existing fans are generally injection molded parts, and in order to match the diameter of the shaft, the size of the installation is also relatively small. The small size leads to a small assembly tolerance range, and the dimensional accuracy requirements of the installation hole and the shaft are extremely strict. During the interference fit installation of the shaft, if the dimensional accuracy is exceeded, it is easy to cause the installation hole to be squeezed and cracked. Utility Model Content

[0005] The purpose of the utility model is to provide a method to solve the technical problems in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is to provide a motor, including a shell, a rotor assembly and a fan, the rotor assembly and the fan are arranged in the shell, the shell includes an inner sleeve and an outer sleeve sleeved outside the inner sleeve, a fluid air duct is formed between the inner sleeve and the outer sleeve, the rotor assembly includes a drive shaft, the lower end of the outer sleeve is provided with a accommodating cavity, the fan is located in the accommodating cavity, the fan includes a body and a mounting sleeve, the body is provided with a mounting hole, the mounting hole is fixedly connected to the mounting sleeve, the drive shaft is inserted into the inner diameter of the mounting sleeve, the drive shaft sleeve is provided with a bearing and is rotatably connected to the inner sleeve through the bearing.

[0007] Furthermore, both the inner diameter surface and the outer diameter surface of the mounting sleeve are provided with friction patterns for increasing resistance.

[0008] Furthermore, the body includes a hub and blades, the blades are multiple and evenly arranged on the outer surface of the hub in the circumferential direction, and the mounting hole is provided at the center position of the hub.

[0009] Furthermore, the hub and the blades are integrally injection molded.

[0010] Furthermore, the bearing comprises an upper bearing and a lower bearing, a spring is sleeved on the drive shaft between the upper bearing and the lower bearing, and ends of the spring are respectively in pressure contact with the upper bearing and / or the lower bearing.

[0011] Furthermore, the motor also includes a stator assembly, a circuit board is provided at the upper end of the shell, a heat dissipation cavity is formed between the circuit board and the stator assembly, the circuit board has heat dissipation holes penetrating its upper and lower surfaces, and the heat dissipation holes are connected to the heat dissipation cavity.

[0012] Furthermore, the height of the mounting sleeve is greater than the height of the mounting hole.

[0013] Furthermore, the installation sleeve is made of metal material.

[0014] Furthermore, the rotor assembly also includes a shaft sleeve, which is inserted into the inner sleeve, and the shaft sleeve and the inner sleeve are interference fit, and the bearing is located in the shaft sleeve and is rotatably connected to the shaft sleeve.

[0015] The beneficial effects of the utility model are:

[0016] 1. The fan includes a body and a mounting sleeve. The body is provided with a mounting hole, the mounting hole is fixedly connected with the mounting sleeve, and the drive shaft is inserted into the inner diameter of the mounting sleeve. Due to the installation of the mounting sleeve, the mounting hole needs to be opened with a larger size. When the size of the mounting hole becomes larger, a larger range of assembly tolerance can be achieved, and the requirements for dimensional accuracy are reduced. At this time, the mounting sleeve is easy to install and is not prone to extrusion and rupture of the mounting hole. At the same time, the mounting sleeve and the drive shaft are both regular shapes, and the dimensional accuracy is easy to control during the processing process. The inner diameter of the drive shaft and the mounting sleeve is convenient for interference fit installation.

[0017] 2. The inner diameter surface and outer diameter surface of the installation sleeve are provided with friction patterns to increase resistance, which facilitates interference fit installation.

[0018] 3. The bearing includes an upper bearing and a lower bearing. A spring is sleeved on the drive shaft between the upper bearing and the lower bearing. The ends of the spring are respectively pressed against the upper bearing and / or the lower bearing. The two ends of the spring press against the upper bearing and the lower bearing, thereby reducing the contact wear of the upper bearing and the lower bearing during use and increasing the service life of the motor.

[0019] 4. By setting a heat dissipation cavity between the circuit board and the stator assembly, and setting heat dissipation holes penetrating the upper and lower surfaces of the circuit board, the heat dissipation holes are connected to the heat dissipation cavity. When the motor is working, the heat generated by the stator assembly enters the heat dissipation cavity and is discharged outward from the heat dissipation holes, thereby improving the heat dissipation effect of the motor, avoiding excessive temperature of the motor, ensuring that the speed of the motor is not affected, and improving the service life.

[0020] 5. The hub and blades are integrally injection molded, with high processing efficiency. The mounting sleeve is made of metal material, which has good structural strength and is not easily deformed during installation. The fan in this application is light in weight, does not affect the processing accuracy, has high processing efficiency, and can reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 An exploded schematic diagram of a three-dimensional structure of a motor provided in an embodiment of the utility model;

[0023] Figure 2 An exploded schematic diagram of the overall structure of a motor provided by an embodiment of the utility model;

[0024] Figure 3 for Figure 2 Cross-sectional structural diagram;

[0025] Figure 4 A schematic diagram of the overall structure of a fan used in a motor structure provided in an embodiment of the utility model;

[0026] Figure 5 A cross-sectional view of a fan used in a motor structure provided in an embodiment of the utility model;

[0027] Figure 6 A schematic diagram of the installation of a mounting sleeve used in a motor structure provided in an embodiment of the utility model;

[0028] Figure 7 A schematic diagram of the installation of a shaft sleeve used in a motor structure provided in an embodiment of the utility model;

[0029] Figure 8 A cross-sectional view of a shell used in a motor structure provided in an embodiment of the utility model.

[0030] Description of reference numerals:

[0031] 1. Shell; 11. Accommodating chamber; 12. Inner sleeve; 13. Outer sleeve; 14. Fluid duct; 2. Rotor assembly; 21. Drive shaft; 22. Upper bearing; 23. Lower bearing; 24. Spring; 25. Bushing; 3. Fan; 31. Main body; 311. Mounting hole; 312. Hub; 313. Blade; 32. Mounting sleeve; 4. Stator assembly; 5. Circuit board; 6. Terminal; 7. Magnetic core. DETAILED DESCRIPTION

[0032] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. 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.

[0033] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Reference Figures 1 to 8A motor provided as an embodiment of the utility model includes a shell 1, a rotor assembly 2 and a fan 3. The rotor assembly 2 and the fan 3 are arranged in the shell 1. The shell 1 includes an inner sleeve 12 and an outer sleeve 13 sleeved outside the inner sleeve 12. A fluid air duct 14 is formed between the inner sleeve 12 and the outer sleeve 13. The rotor assembly 2 includes a drive shaft 21. The lower end of the outer sleeve 13 is provided with a accommodating chamber 11. The fan 3 is located in the accommodating chamber 11. The fan 3 includes a body 31 and a mounting sleeve 32. The body 31 is provided with a mounting hole 311. The mounting hole 311 is fixedly connected to the mounting sleeve 32. The drive shaft 21 is inserted into the inner diameter of the mounting sleeve 32. The drive shaft 21 is sleeved with a bearing and is rotatably connected to the inner sleeve 12 through the bearing.

[0037] The fan 3 includes a body 31 and a mounting sleeve 32. The body 31 is provided with a mounting hole 311, the mounting hole 311 is fixedly connected with the mounting sleeve 32, and the drive shaft 21 is inserted into the inner diameter of the mounting sleeve 32. Due to the installation of the mounting sleeve 32, the mounting hole 311 needs to be larger in size. After the size of the mounting hole 311 becomes larger, a larger range of assembly tolerance can be achieved, and the requirements for dimensional accuracy are reduced. At this time, the mounting sleeve 32 is easy to install and is not easy to cause extrusion and rupture of the mounting hole 311. At the same time, the mounting sleeve 32 and the drive shaft 21 are both regular shapes, and the dimensional accuracy is easy to control during the processing process. The inner diameters of the drive shaft 21 and the mounting sleeve 32 are convenient for interference fit installation.

[0038] In this embodiment, the inner sleeve 12 and the outer sleeve 13 are connected by connecting ribs, and a fluid air duct 14 is formed between the inner sleeve 12 and the outer sleeve 13. The rotor assembly 2 includes a rotating shaft and a magnetic core 7, and the magnetic core 7 is arranged at the upper end of the rotating shaft. The inner diameter surface and the outer diameter surface of the mounting sleeve 32 are both provided with friction lines that increase resistance, which is convenient for interference fit installation. The body 31 includes a hub 312 and blades 313, and the blades 313 are multiple and evenly arranged on the outer surface of the hub 312 in the circumferential direction. The center position of the hub 312 is provided with a mounting hole 311. The hub 312 and the blades 313 are integrally injection molded, and the processing and manufacturing efficiency is high. The mounting sleeve 32 is made of metal material, and the structural strength of the metal material is good, and it is not easy to deform during the installation process. The fan 3 in this embodiment is light in overall weight, does not affect the processing and manufacturing accuracy, has high processing efficiency, and can reduce costs. The mounting sleeve 32 is preferably made of copper material, which has strong corrosion resistance. Among them, the mounting sleeve 32 can also be made of metal materials such as aluminum, iron or other alloys. The height of the mounting sleeve 32 is greater than the height of the mounting hole 311 , so that the mounting sleeve 32 can be fully inserted into the mounting hole 311 , thereby preventing the mounting sleeve 32 from accidentally detaching from the body 31 .

[0039] Furthermore, the bearing comprises an upper bearing 22 and a lower bearing 23 , and a spring 24 is sleeved on the driving shaft 21 between the upper bearing 22 and the lower bearing 23 , and ends of the spring 24 are respectively pressed against the upper bearing 22 and / or the lower bearing 23 .

[0040] Specifically, in this embodiment, the rotor assembly 2 further includes a sleeve 25, which is made of metal. The sleeve 25 is inserted into the inner sleeve 12, and the sleeve 25 and the inner sleeve 12 are interference fit. The upper bearing 22 and the lower bearing 23 are located in the sleeve 25 and are rotatably connected to the sleeve 25. The two ends of the spring 24 are respectively pressed against the lower surface of the upper bearing 22 and the upper surface of the lower bearing 23. By providing the spring 24, the contact wear of the upper bearing 22 and the lower bearing 23 during use is reduced, thereby improving the service life of the motor. The motor also includes a stator assembly 4, and a circuit board 5 is provided at the upper end of the housing 1. A heat dissipation cavity is formed between the circuit board 5 and the stator assembly 4. The circuit board 5 has a heat dissipation through hole that runs through its upper and lower surfaces, and the heat dissipation through hole is connected to the heat dissipation cavity. A mounting seat for mounting the circuit board 5 is provided at the upper end of the stator assembly 4 to facilitate the installation of the circuit board 5. The end of the circuit board 5 away from the stator assembly 4 is connected to a terminal 6, which is an important component for connecting the power supply to the circuit inside the motor.

[0041] Furthermore, a mounting position is provided on the outer sleeve 13 of the housing 1, and the motor as a whole can be fixed by the mounting position. The mounting position is provided with bolts and nuts for convenient installation, and the mounting position is fixed by connecting the bolts and nuts.

[0042] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A motor, comprising a housing (1), a rotor assembly (2) and a fan (3), wherein the rotor assembly (2) and the fan (3) are arranged in the housing (1), the housing (1) comprises an inner sleeve (12) and an outer sleeve (13) sleeved outside the inner sleeve (12), a fluid air duct (14) is formed between the inner sleeve (12) and the outer sleeve (13), the rotor assembly (2) comprises a drive shaft (21), and is characterized in that: The lower end of the outer sleeve (13) is provided with a receiving cavity (11), the fan (3) is located in the receiving cavity (11), the fan (3) comprises a body (31) and a mounting sleeve (32), the body (31) is provided with a mounting hole (311), the mounting hole (311) is fixedly connected with the mounting sleeve (32), the drive shaft (21) is inserted into the inner diameter of the mounting sleeve (32), the drive shaft (21) is provided with a bearing and is rotatably connected to the inner sleeve (12) via the bearing.

2. A motor as claimed in claim 1, characterized in that: The inner diameter surface and the outer diameter surface of the installation sleeve (32) are both provided with friction patterns for increasing resistance.

3. A motor as claimed in claim 2, characterized in that: The body (31) comprises a hub (312) and blades (313); the blades (313) are multiple and evenly arranged on the outer surface of the hub (312) in the circumferential direction; the mounting hole (311) is provided at the center of the hub (312).

4. A motor as claimed in claim 3, characterized in that: The hub (312) and the blades (313) are integrally injection-molded.

5. A motor as claimed in claim 1, characterized in that: The bearing comprises an upper bearing (22) and a lower bearing (23); a spring (24) is sleeved on the drive shaft (21) between the upper bearing (22) and the lower bearing (23); ends of the spring (24) are respectively in pressure contact with the upper bearing (22) and / or the lower bearing (23).

6. A motor as claimed in claim 1, characterized in that: It also comprises a stator assembly (4), a circuit board (5) being provided at the upper end of the housing (1), a heat dissipation cavity being formed between the circuit board (5) and the stator assembly (4), the circuit board (5) having heat dissipation through holes penetrating the upper and lower surfaces thereof, the heat dissipation through holes being connected to the heat dissipation cavity.

7. A motor as claimed in claim 1, characterized in that: The height of the mounting sleeve (32) is greater than the height of the mounting hole (311).

8. A motor as claimed in claim 1, characterized in that: The installation sleeve (32) is made of metal material.

9. A motor as claimed in claim 1, characterized in that: The rotor assembly (2) further comprises a shaft sleeve (25), wherein the shaft sleeve (25) is inserted into the inner sleeve (12), the shaft sleeve (25) and the inner sleeve (12) are interference fit, and the bearing is located in the shaft sleeve (25) and is rotatably connected to the shaft sleeve (25).

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