Motor with integrated housing

Abstract

The utility model relates to the technical field of motors, and discloses a motor with an integrated housing, comprising a housing, the lower surface of the housing is provided with heat dissipation holes, the center of the inner surface of the housing is rotatably clamped with a movable shaft sleeve, and the inner wall of the movable shaft sleeve is fixedly connected with a rotating shaft. A rotor assembly is arranged between the inner wall of the shell and the outer wall of the rotating shaft, the rotor assembly comprises an impeller, the inner wall of the impeller fixedly sleeves the outer side of the rotating shaft, the outer side of the impeller is fixedly connected with a rotor iron core frame, and the upper surface of the rotor iron core frame is provided with a mounting groove. According to the utility model, the rotor assembly, the positioning clamping grooves of the mounting grooves and the positioning clamping columns of the permanent magnets are in clearance fit, so that the assembly and subsequent maintenance and disassembly of the rotor iron core frame and the permanent magnets are facilitated, and meanwhile, the symmetrical positioning clamping columns enable the permanent magnets to be stressed in a balanced manner, limit the radial displacement of the permanent magnets and avoid looseness caused by centrifugal force during rotation; connection strength and positioning precision are enhanced, and the high-rotation-speed requirement of the motor is met.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor with an integrated housing. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction.12 Electric motors are divided into electric motors and generators. The main function of an electric motor is to convert electrical energy into mechanical energy and generate driving torque, serving as a power source for electrical appliances or various machines. The main function of a generator is to convert mechanical energy into electrical energy.

[0003] An electric motor is typically composed of core components such as a stator, rotor, housing, bearings, shaft, windings, and end caps. Different types of motors, such as DC motors, AC motors, and stepper motors, have slightly different structures, but their basic operating principles are similar.

[0004] While existing motors achieve the conversion of electrical energy into mechanical energy, their modular housings are prone to gaps, pose a risk of separation during operation, and have low heat dissipation efficiency. In addition, the permanent magnet mounting structure of the rotor assembly lacks stability and has poor positioning accuracy, which affects the motor's protection level and service life, making it less convenient to use. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a motor with an integrated housing, which aims to solve the problems in the prior art where the spliced ​​housing is prone to gaps, poses a risk of separation during operation, and has low heat dissipation efficiency. At the same time, the permanent magnet mounting structure of the rotor assembly has insufficient stability and poor positioning accuracy, thus affecting the motor's protection level and service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a motor with an integrated housing, including a housing, a heat dissipation hole on the lower surface of the housing, a movable bushing rotatably engaged at the center of the inner surface of the housing, a rotating shaft fixedly connected to the inner wall of the movable bushing, and a rotor assembly disposed between the inner wall of the housing and the outer wall of the rotating shaft.

[0007] The rotor assembly includes an impeller, the inner wall of which is fixedly sleeved on the outer side of the rotating shaft. A rotor core frame is fixedly connected to the outer side of the impeller. An installation groove is formed on the upper surface of the rotor core frame. A positioning slot is formed on the inner wall of the installation groove. A permanent magnet is movably engaged with the inner wall of the installation groove. A fixed bushing is sleeved between the outer side of the rotating shaft and the inner side of the rotor core frame. A top cover is fixedly connected to the top of the fixed bushing. An upper bearing is fixedly engaged with the upper surface of the top cover. A stator winding is sleeved and connected to the outer periphery of the fixed bushing. A lower bearing is fixedly engaged with the lower surface of the stator winding.

[0008] As a further description of the above technical solution:

[0009] There are two positioning slots, which are mirror images of each other along the central axis of the mounting groove.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the permanent magnet is fixedly connected to a positioning pin, and the outer wall of the positioning pin is movably engaged with the inner wall of the positioning slot.

[0012] As a further description of the above technical solution:

[0013] There are two positioning pins, which are mirror images of each other along the central axis of the permanent magnet.

[0014] As a further description of the above technical solution:

[0015] The top cover has mounting screw holes on its upper surface, and three mounting screw holes are evenly distributed in a ring along the upper surface of the top cover.

[0016] As a further description of the above technical solution:

[0017] A through hole is provided between the top cover and the fixed bushing, wherein the inner wall of the through hole is adapted to the outer wall size of the rotating shaft.

[0018] As a further description of the above technical solution:

[0019] The inner walls of the upper and lower bearings are fitted and connected to the outer wall of the rotating shaft.

[0020] As a further description of the above technical solution:

[0021] The upper surface of the stator winding is fixedly connected with control wiring.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the positioning slot of the mounting groove and the positioning post of the permanent magnet are fitted with a clearance through the rotor assembly, which facilitates the assembly of the rotor core frame and the permanent magnet and subsequent maintenance and disassembly. At the same time, the symmetrical positioning posts balance the force on the permanent magnet, limit its radial displacement, and prevent loosening due to centrifugal force during rotation, thereby enhancing the connection strength and positioning accuracy and meeting the high speed requirements of the motor.

[0024] 2. In this utility model, the shell, which has heat dissipation holes, is made in one piece. Compared with the spliced ​​shell, this reduces gaps and weight, avoids the risk of separation during operation, and effectively accelerates the heat dissipation of the motor during operation, thereby improving the protection level of the motor. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an electric motor with an integrated housing proposed in this utility model;

[0026] Figure 2 This is a schematic diagram showing the disassembled structure of the shaft and stator windings of a motor with an integrated housing proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the overall disassembled structure of a motor with an integrated housing proposed in this utility model;

[0028] Figure 4 This is a schematic diagram showing the disassembled structure of the rotor assembly of an electric motor with an integrated housing, as proposed in this utility model.

[0029] Legend:

[0030] 1. Housing; 2. Heat dissipation holes; 3. Movable bushing; 4. Rotating shaft; 5. Rotor assembly; 51. Impeller; 52. Rotor core frame; 53. Mounting groove; 54. Positioning slot; 55. Permanent magnet; 56. Positioning pin; 6. Fixed bushing; 7. Top cover; 8. Mounting screw holes; 9. Upper bearing; 10. Stator winding; 11. Lower bearing; 12. Control wiring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-3This utility model provides an embodiment of a motor with an integrated housing, including a housing 1. The housing 1 is manufactured using an integrated molding process, which reduces gaps and avoids the risk of separation during operation compared to a spliced ​​housing, thus improving the motor's protection level. The lower surface of the housing 1 has heat dissipation holes 2, which are fan-shaped and distributed in a ring to increase the heat dissipation area and facilitate faster heat dissipation during motor operation. A movable bushing 3 is rotatably engaged at the center of the inner surface of the housing 1. The movable bushing 3 is precision injection molded to form an interference fit with the inner wall of the housing 1, ensuring both rotational flexibility and preventing axial movement. A rotating shaft 4 is fixedly connected to the inner wall of the movable bushing 3. The rotating shaft 4 and the movable bushing 3 are fixed using a hot-press embedding process to ensure concentricity and improve power transmission efficiency. A rotor assembly 5 is disposed between the inner wall of the housing 1 and the outer wall of the rotating shaft 4. The rotor assembly 5 is located in the core area of ​​the motor's magnetic field interaction, and its rotational motion converts electrical energy into mechanical energy through the principle of electromagnetic induction. A fixed bushing 6 is fitted between the outer side of the rotating shaft 4 and the inner side of the rotor assembly 5. The fixed bushing 6 is made of high-strength aluminum alloy, which reduces weight while providing stable axial support for the rotor assembly 5. A top cover 7 is fixedly connected to the top of the fixed bushing 6. The top cover 7 and the fixed bushing 6 are connected by welding to form a strong and sealed integral structure. A through hole is provided between the top cover 7 and the fixed bushing 6. The inner wall of the through hole is adapted to the outer wall of the rotating shaft 4. The through hole is precision ground to form an H7 / g6 clearance fit with the rotating shaft 4. To ensure the free rotation of the shaft 4 while controlling radial runout error, the upper surface of the top cover 7 has mounting screw holes 8. Three mounting screw holes 8 are evenly distributed in a ring along the upper surface of the top cover 7, at 120° intervals. Together with anti-loosening bolts, these holes ensure even force distribution and secure installation of the top cover 7 onto the working end face, preventing installation deformation. An upper bearing 9, a deep groove ball bearing, is fixedly attached to the upper surface of the top cover 7. This bearing features high speed and low friction, capable of withstanding radial loads and a small amount of axial load. A stator winding 10 is connected to the outer circumference of the fixed bushing 6. The stator winding 10 uses a multi-layer dense winding process with enameled copper wire, and is externally wrapped with insulating and thermally conductive silicone to improve energy conversion efficiency and enhance insulation performance. A control mechanism is fixedly connected to the upper surface of the stator winding 10. Wiring 12, the control wiring 12 uses a waterproof aviation plug for easy and quick connection with external control systems, and has an anti-misplugging function. The lower bearing 11 is fixedly clipped to the lower surface of the stator winding 10. The inner walls of the upper bearing 9 and the lower bearing 11 are fitted to the outer wall of the rotating shaft 4. The lower bearing 11 and the upper bearing 9 are of the same model and are symmetrically arranged to form a stable double-support structure. By using the lower bearing 11, the upper bearing 9 and the rotating shaft 4 for interference fit and with grease filling, friction loss can be effectively reduced and service life extended. The housing 1, which has heat dissipation holes 2, adopts an integrated molding process. Compared with spliced ​​housings, it can reduce gaps, avoid the risk of separation during operation, and effectively facilitate the accelerated heat dissipation during motor operation.This improves the motor's protection level.

[0033] Reference Figures 2-4 The rotor assembly 5 includes an impeller 51, the inner wall of which is fixedly sleeved on the outer side of the rotating shaft 4. The impeller 51 is manufactured using a die-casting process, which optimizes aerodynamic performance and reduces wind resistance and noise. A rotor core frame 52 is fixedly connected to the outer side of the impeller 51. An installation groove 53 is formed on the upper surface of the rotor core frame 52. The depth of the installation groove 53 is optimized through magnetic circuit simulation, which can not only securely install the permanent magnet 55 but also maximize the magnetic field strength. A positioning slot 54 is formed on the inner wall of the installation groove 53. There are two positioning slots 54, which are mirror images of each other along the central axis of the installation groove 53. The double positioning slot 54 design can prevent the permanent magnet 55 from twisting during installation and ensure accurate positioning of the magnetic pole direction. The permanent magnet 55 is movably engaged on the inner wall of the installation groove 53. The permanent magnet 55 is made of high remanence neodymium iron boron material, which can provide a stable and strong magnetic field after magnetization, thereby increasing the output torque of the motor. The outer wall of the iron core frame 55 is fixedly connected with a positioning pin 56. The outer wall of the positioning pin 56 is movably engaged with the inner wall of the positioning slot 54. The positioning pin 56 and the positioning slot 54 are in clearance fit, which facilitates installation and disassembly. At the same time, it restricts the radial displacement of the permanent magnet 55, enhances the connection strength and positioning accuracy. There are two positioning pins 56. The two positioning pins 56 are mirrored along the central axis of the permanent magnet 55. The symmetrical positioning pins 56 can balance the force on the permanent magnet 55 and prevent loosening due to centrifugal force during rotation. Through the rotor assembly 5, the mounting groove 53 with the positioning slot 54 is combined with the permanent magnet 55 with the positioning pin 56 in clearance fit, which facilitates the installation and disassembly of the rotor core frame 52 and the permanent magnet 55. At the same time, the symmetrical positioning pins 56 can balance the force on the permanent magnet 55, restrict the radial displacement of the permanent magnet 55, prevent loosening due to centrifugal force during rotation, and enhance the connection strength and positioning accuracy.

[0034] Working principle: When the motor is running, the external power supply supplies power to the stator winding 10 through the control wiring 12 connected by the waterproof aviation plug. The stator winding 10 adopts a multi-layer dense winding process of enameled copper wire and is wrapped with insulating and thermally conductive silicone. After being energized, it generates an alternating magnetic field, which acts on the rotor assembly 5. In the rotor assembly 5, the inner wall of the impeller 51 is fixedly sleeved on the outside of the rotating shaft 4. The rotor core frame 52 on the outside of the impeller 51 has a mounting groove 53. The two positioning slots 54 on the inner wall of the mounting groove 53 are clearance-fitted with the two positioning pins 56 on the outer wall of the permanent magnet 55. The permanent magnet 55 is made of high remanence neodymium iron boron material, which provides a stable and strong magnetic field after being magnetized. Under the principle of electromagnetic induction, the rotor assembly 5, as the core area of ​​the motor's magnetic field interaction, has its impeller 51, rotor core frame 52, and permanent magnet 55 rotating with the rotating shaft 4, converting electrical energy into mechanical energy. The rotating shaft 4 is rotatably engaged with the inner surface of the housing 1 through the movable bushing 3. Through precision injection molding and interference fit with the inner wall of housing 1, the rotating shaft 4 and the movable bushing 3 are fixed by hot pressing and embedding process to ensure concentricity and improve power transmission efficiency. The fixed bushing 6, which is sleeved between the outer side of the rotating shaft 4 and the inner side of the rotor assembly 5, is made of high-strength aluminum alloy and provides stable axial support for the rotor assembly 5. The top cover 7 at its top is welded to the fixed bushing 6 to form a strong and sealed whole. The upper bearing 9 on the upper surface of the top cover 7 and the lower bearing 11 on the lower surface of the fixed bushing 6 are both deep groove ball bearings of the same model and arranged symmetrically. They are interference fit with the rotating shaft 4 and filled with grease to form a stable double-support structure, which can bear radial load and a small amount of axial load, reduce friction loss and extend service life. Housing 1 adopts an integrated molding process. The fan-shaped and annularly distributed heat dissipation holes 2 on the lower surface increase the heat dissipation area, facilitate the accelerated heat dissipation when the motor is working, reduce gaps, avoid the risk of separation during operation, and improve the protection level.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A motor with an integrated housing, comprising a housing (1), characterized in that: The lower surface of the housing (1) is provided with heat dissipation holes (2), and a movable bushing (3) is rotatably engaged at the center of the inner surface of the housing (1). A rotating shaft (4) is fixedly connected to the inner wall of the movable bushing (3), and a rotor assembly (5) is provided between the inner wall of the housing (1) and the outer wall of the rotating shaft (4). The rotor assembly (5) includes an impeller (51), the inner wall of which is fixedly sleeved on the outer side of the rotating shaft (4), and a rotor core frame (52) is fixedly connected to the outer side of the impeller (51). An installation groove (53) is provided on the upper surface of the rotor core frame (52), and a positioning slot (54) is provided on the inner wall of the installation groove (53). A permanent magnet (55) is movably engaged on the inner wall of the installation groove (53). A fixed bushing (6) is sleeved between the outer side of the rotating shaft (4) and the inner side of the rotor core frame (52). A top cover (7) is fixedly connected to the top of the fixed bushing (6), and an upper bearing (9) is fixedly engaged on the upper surface of the top cover (7). A stator winding (10) is sleeved and connected to the outer periphery of the fixed bushing (6), and a lower bearing (11) is fixedly engaged on the lower surface of the stator winding (10).

2. The motor with an integrated housing according to claim 1, characterized in that: There are two positioning slots (54), and the two positioning slots (54) are mirrored along the central axis of the mounting groove (53).

3. The motor with an integrated housing according to claim 1, characterized in that: The outer wall of the permanent magnet (55) is fixedly connected to a positioning pin (56), and the outer wall of the positioning pin (56) is movably engaged with the inner wall of the positioning slot (54).

4. The motor with an integrated housing according to claim 3, characterized in that: There are two positioning pins (56), and the two positioning pins (56) are mirrored along the central axis of the permanent magnet (55).

5. The motor with an integrated housing according to claim 1, characterized in that: The top cover (7) has mounting screw holes (8) on its upper surface. The mounting screw holes (8) are arranged in three circumferentially at equal intervals along the upper surface of the top cover (7).

6. The motor with an integrated housing according to claim 1, characterized in that: An installation through hole is provided between the top cover (7) and the fixed bushing (6), wherein the inner wall of the installation through hole is adapted to the outer wall size of the rotating shaft (4).

7. The motor with an integrated housing according to claim 1, characterized in that: The inner walls of the upper bearing (9) and the lower bearing (11) are fitted and connected to the outer wall of the rotating shaft (4).

8. The motor with an integrated housing according to claim 1, characterized in that: The upper surface of the stator winding (10) is fixedly connected with a control wiring (12).

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