Motor integrated with gear, electric drive system and automobile

Abstract

The utility model belongs to the technical field of motors, and particularly relates to a motor integrated with a gear, an electric drive system and an automobile. The motor integrated with the gear comprises a stator; the outer rotor is provided with a plurality of mounting grooves, the mounting grooves are used for mounting magnetic steel, the number of the mounting grooves is not less than that of the magnetic steel, the magnetic steel is detachably mounted in the mounting grooves, and the arrangement mode of the magnetic steel in the outer rotor can be changed so as to change the magnetic field intensity in the motor; the gear is detachably arranged outside the outer rotor in a sleeving mode and driven by the outer rotor to rotate. According to the motor, the plurality of mounting grooves are formed in the outer rotor to mount the magnetic steel, and the magnetic field intensity in the motor is changed by changing the arrangement of the magnetic steel in the mounting grooves, so that the motor can adapt to the torque requirements of different scenes and achieve the purpose of matching gears of different models.

Description

Technical Field

[0001] The present application belongs to the field of motor technology, and specifically relates to motors with integrated gears, electric drive systems and automobiles. Background Art

[0002] In the field of new energy vehicles, it involves driving the gears to rotate through motors to achieve torque transmission. The existing solutions generally adopt a solution in which the motor and gears are arranged independently. This solution results in a high space occupation of the motor and gears inside the car, which is not conducive to integration to reduce the space occupation; another existing solution adopts a solution in which the motor and gears are integrated, in which the magnetic field strength inside the motor is a fixed value, so this results in the need for the motor to be matched with gears that match the transmitted torque during installation, which affects the versatility of the motor. For this reason, it is necessary to optimize the magnetic field arrangement inside the motor so that the motor can be compatible with the gear requirements of different scenarios. Utility Model Content

[0003] One of the inventive purposes of the present application is to provide a motor with integrated gears, in which a plurality of mounting slots are provided in the outer rotor to install magnets, and the arrangement of the magnets in the mounting slots is changed to change the magnetic field strength in the motor, thereby enabling the motor to adapt to the torque requirements of different scenarios and achieve the purpose of matching gears of different models.

[0004] Another invention object of the present application is to provide an electric drive system, which includes the above-mentioned motor with integrated gears.

[0005] Another object of the present application is to provide a car comprising the above-mentioned electric drive system.

[0006] According to an embodiment of the present application, a first aspect provides a motor with integrated gears, comprising:

[0007] stator;

[0008] An outer rotor, wherein the outer rotor is provided with a plurality of mounting grooves, wherein the mounting grooves are used to mount magnetic steels, wherein the number of the mounting grooves is not less than the number of the magnetic steels, wherein the magnetic steels are detachably mounted in the mounting grooves, and the arrangement of the magnetic steels in the outer rotor can be changed to thereby change the magnetic field strength in the motor;

[0009] The gear is detachably sleeved on the outside of the outer rotor and is driven to rotate by the outer rotor.

[0010] In one embodiment, the plurality of mounting grooves are arranged along the circumference of the outer rotor, two adjacent mounting grooves are symmetrically staggered and arranged, and the angular direction of the two adjacent mounting grooves when formed is toward the center of the outer rotor.

[0011] In one embodiment, the plurality of mounting grooves are arranged in at least two circles in the circumferential direction of the outer rotor.

[0012] In one embodiment, the outer rotor includes a first shell and a second shell, the outer ring diameter of the first shell is smaller than the inner ring diameter of the gear, the inner ring of the gear is interference fit with the outer ring of the first shell, the outer ring diameter of the second shell is larger than the outer ring diameter of the first shell, and the edge of the second shell higher than the first shell limits the axial position of the gear.

[0013] In one embodiment, the first housing is provided with a positioning block, the positioning block extends along the axial direction of the outer rotor, and the inner ring of the gear is provided with a positioning groove which is interference-fitted with the positioning block.

[0014] In one embodiment, the number of the positioning blocks is an even number and they are symmetrically arranged on the first housing, and the number of the positioning slots is the same as the number of the positioning blocks and corresponds one to one.

[0015] In one embodiment, the motor further includes a bearing, the stator is disposed in the middle of the outer rotor, and the bearing is disposed between the outer rotor and the stator.

[0016] In one embodiment, the motor further includes a first end cover, a second end cover and a fastener, wherein the first end cover is arranged at one end of the outer rotor, the second end cover is arranged at the other end of the outer rotor, and the fastener connects the first end cover and the second end cover and fixes the first end cover and the second end cover to the outer rotor.

[0017] According to an embodiment of the present application, a second aspect provides an electric drive system, which includes the above-mentioned motor with integrated gears.

[0018] According to an embodiment of the present application, a third aspect provides a car, which includes the electric drive system.

[0019] In the motor with integrated gears of the present application, gears are arranged in the outer rotor, and the outer rotor drives the gears to realize the transmission of torque. Since the outer rotor and the gears are arranged integrally, the space occupied by the motor and the gears in the car is reduced. At the same time, a plurality of mounting slots are arranged in the outer rotor, and the magnetic field strength in the motor is changed by changing the position of the magnetic steel in the mounting slot, so that the motor meets the requirements of different operating environments, and can match different gear models, thereby increasing the versatility of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a motor with integrated gears in one embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the structure of a motor with integrated gears in another embodiment of the present application;

[0022] Figure 3 for Figure 2 Enlarged schematic diagram at point A in the middle.

[0023] Description of Figure Numbers:

[0024] 100. stator;

[0025] 200, outer rotor; 210, mounting groove; 220, first housing; 221, positioning block;

[0026] 230, second housing; 300, gear; 310, positioning groove;

[0027] 400. First end cover; 500. Second end cover; 600. Fastener. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.

[0030] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0031] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] As introduced in the background, in the field of new energy vehicles, it involves driving the gears to rotate through the motor to achieve the transmission of torque. In the existing scheme, the motor and gear are generally arranged independently. This scheme results in a high space occupation of the motor and gear inside the car, which is not conducive to integration to reduce the space occupation; another existing scheme adopts a scheme of integrated arrangement of the motor and gear, in which the magnetic field strength inside the motor is a fixed value, so this causes the motor to be installed with a gear that matches the transmission torque, which affects the versatility of the motor. For this reason, it is necessary to optimize the magnetic field arrangement inside the motor so that the motor can be compatible with the gear requirements of different scenarios. In order to better solve this problem, the researchers in this application proposed a motor with integrated gears, which integrates gears in the outer rotor to reduce the space occupation of the motor and gears in the car, and at the same time, multiple mounting slots are set in the outer rotor. By changing the position of the magnetic steel in the mounting slot, the magnetic field strength in the motor is changed, so that the motor meets the requirements of different operating environments, and can match different gear models to increase the versatility of the motor.

[0033] like Figure 1 As shown, Figure 1 The schematic diagram of the structure of the motor with integrated gears in one embodiment of the present application. The motor with integrated gears includes: a stator 100, an outer rotor 200 and a gear 300. The researchers in this embodiment intend to reduce the space occupied by the motor and the gear 300 in the car by integrating the gear 300 in the outer rotor 200 after the motor is powered on. At the same time, a plurality of mounting slots 210 are provided in the outer rotor 200 in the present application. By changing the position of the magnet in the mounting slot 210, the magnetic field strength in the motor is changed, so that the motor meets the requirements of different operating environments, and can match different gear 300 models, thereby improving the versatility of the motor.

[0034] Specifically, the outer rotor 200 is provided with a plurality of mounting grooves 210, wherein the mounting grooves 210 are used to mount magnetic steel, the number of the mounting grooves 210 is not less than the number of the magnetic steel, and the magnetic steel is detachably mounted in the mounting grooves 210, and the arrangement of the magnetic steel in the outer rotor 200 can be changed to change the magnetic field strength in the motor. The gear 300 is detachably mounted on the outside of the outer rotor 200 and is driven to rotate by the outer rotor 200.

[0035] In this embodiment, when the motor is powered on, the outer rotor 200 rotates around the stator 100. Since the gear 300 is integrated in the outer rotor 200, the gear 300 can be driven to rotate during the rotation of the outer rotor 200. The present application integrates the motor with the gear 300, thereby reducing the space occupied by the motor and the gear 300 in the car during transmission. At the same time, a plurality of mounting slots 210 are provided in the outer rotor 200 in the present application. By changing the position of the magnetic steel in the mounting slot 210, the magnetic field strength in the motor is changed, so that the motor meets the requirements of different operating environments, and can match different gear 300 models, thereby increasing the versatility of the motor.

[0036] During the operation of the motor, the intensity distribution of the magnetic field affects the efficiency and output power of the motor. The researchers have improved and optimized the arrangement of the magnetic steel in the outer rotor 200 of the motor, so that the magnetic field in the motor is more evenly distributed and the output power of the motor is more stable. Figure 1 As shown, a plurality of mounting grooves 210 are arranged along the circumference of the outer rotor 200 , and two adjacent mounting grooves 210 are symmetrically staggered and arranged, and the angular direction of the two adjacent mounting grooves 210 when formed is toward the center of the outer rotor 200 .

[0037] In this embodiment, by arranging a plurality of mounting slots 210 along the circumference of the outer rotor 200, and making the mounting slots 210 staggered in a "fishbone" shape, the angle setting between the magnets can effectively disperse the magnetic field lines and reduce the concentration of the local magnetic field, so that the magnetic field distribution of the entire outer rotor 200 is more uniform. In addition, this arrangement method can effectively reduce magnetic flux leakage. By optimizing the relative position between the magnets, the magnetic field can be more concentrated in the effective working area between the outer rotor 200 and the stator 100, rather than being ineffectively dissipated to the external space. Finally, due to the uniformity of the magnetic field distribution and the reduction of magnetic flux leakage, this arrangement can reduce torque fluctuations and vibration noise during operation. The reduction of torque fluctuations helps to improve the running smoothness and life of the motor.

[0038] Further, in one embodiment, see Figure 1 As shown, the plurality of mounting grooves 210 are arranged in at least two circles in the circumferential direction of the outer rotor 200 .

[0039] In this embodiment, since the motor in this application needs to have good general performance, it is necessary to consider optimizing the magnetic field inside the motor. To this end, in this embodiment, the researchers designed the number of circles of the multiple magnetic steels arranged axially in the outer rotor 200 to be at least two circles, and the number of circles and the number of magnetic steels in each circle can be adjusted as needed during the use of the motor. For example, when magnetic steel is provided in each circle, the superposition of the magnetic fields of multiple circles of magnetic steel can produce a stronger total magnetic field, so that the motor can generate a greater torque to adapt to different working scenarios. In addition, multiple circles of magnetic steel can further homogenize the magnetic field distribution through the interaction between different circles. This also helps to improve the efficiency of the motor and reduce flux leakage.

[0040] During the installation process of the outer rotor 200 and the gear 300, the researchers optimized the connection relationship between the outer rotor 200 and the gear 300. Specifically, in one embodiment, refer to Figure 2 and Figure 3 As shown, the outer rotor 200 includes a first shell 220 and a second shell 230. The outer ring diameter of the first shell 220 is smaller than the inner ring diameter of the gear 300. The inner ring of the gear 300 is interference fit with the outer ring of the first shell 220. The outer ring diameter of the second shell 230 is larger than the outer ring diameter of the first shell 220. The second shell 230 is higher than the edge of the first shell 220 to limit the axial position of the gear 300.

[0041] In this embodiment, the researchers optimized the size of the outer shell of the outer rotor 200 in sections, wherein the first outer shell 220 of the outer rotor 200 is used for interference fit with the inner ring of the gear 300, so that the gear 300 and the outer rotor 200 are tightly connected. At the same time, the outer ring diameter of the second outer shell 230 is designed to be larger than the outer ring diameter of the first outer shell 220, so that the edge of the second outer shell 230 can be higher than the edge of the first outer shell 220, and the second outer shell 230 is higher than the edge of the first outer shell 220. The gear 300 can be axially limited by the edge of the second outer shell 230 being higher than the first outer shell 220, reducing the risk of axial movement of the gear 300. In the manufacturing process, the first outer shell 220 and the second outer shell 230 can be made by an integrated forming or welding process.

[0042] Further, in one embodiment, see Figure 2 and Figure 3 As shown, the first housing 220 is provided with a positioning block 221 , wherein the positioning block 221 extends along the axial direction of the outer rotor 200 , and the inner ring of the gear 300 is provided with a positioning groove 310 which is interference-fitted with the positioning block 221 .

[0043] In this embodiment, a positioning block 221 is provided in the first housing 220 and is distributed along the axial direction of the outer rotor 200. At the same time, a positioning groove 310 is provided in the inner ring of the gear 300. Through the cooperation between the positioning block 221 and the positioning groove 310, precise positioning can be achieved during the installation of the gear 300 through the cooperation between the positioning groove 310 and the positioning block 221.

[0044] Furthermore, in one embodiment, the number of the positioning blocks 221 may be an even number and may be symmetrically arranged on the first housing 220 , and the number of the positioning slots 310 may be the same as the number of the positioning blocks 221 and may correspond one to one.

[0045] In this embodiment, by providing an even number of positioning blocks 221 in the first housing 220 of the outer rotor 200, rapid positioning can be achieved; on the other hand, local stress concentration can be reduced, thereby reducing the risk of wear and vibration between the outer rotor 200 and the gear 300.

[0046] In one embodiment, the motor further includes a bearing, wherein the stator 100 is disposed in the middle of the outer rotor 200 , and a bearing is disposed between the outer rotor 200 and the stator 100 .

[0047] In this embodiment, since the outer rotor 200 rotates around the stator 100 , a bearing is provided between the outer rotor 200 and the stator 100 , so that the friction during the relative rotation of the outer rotor 200 and the stator 100 can be reduced.

[0048] In one embodiment, see Figure 2 As shown, the motor also includes a first end cover 400, a second end cover 500 and a fastener 600. The first end cover 400 is arranged at one end of the outer rotor 200, and the second end cover 500 is arranged at the other end of the outer rotor 200. The fastener 600 connects the first end cover 400 and the second end cover 500 and fixes the first end cover 400 and the second end cover 500 to the outer rotor 200.

[0049] In this embodiment, by providing a first end cover 400 at one end of the outer rotor 200, providing a second end cover 500 at the other end of the outer rotor 200, and connecting the first end cover 400 and the second end cover 500 through a fastener 600, the magnetic steel in the outer rotor 200 can be protected from being removed, while reducing the amount of debris inside the environment entering the motor. At the same time, when the magnetic field strength of the motor needs to be changed, the first end cover 400 or the second end cover 500 can be opened to adjust the arrangement of the magnetic steel in the outer rotor 200. The fastener 600 can be a bolt.

[0050] The present application also proposes an electric drive system, which includes the above-mentioned motor with integrated gears. Using the motor with integrated gears in the electric drive system can reduce the overall volume of the electric drive system and improve the integration of the electric drive system. At the same time, since the motor with integrated gears has good universal performance, after being installed in the electric drive system, the electric drive system can also have good universal performance.

[0051] The present application also proposes a car, wherein the car includes the above-mentioned electric drive system. The above-mentioned electric drive system is arranged in the car, which can improve the integration of the interior of the car.

[0052] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A motor with integrated gear, characterized in that: include: stator (100); An outer rotor (200), the outer rotor (200) being provided with a plurality of mounting grooves (210), the mounting grooves (210) being used to mount magnetic steel, the number of the mounting grooves (210) being not less than the number of the magnetic steel, the magnetic steel being detachably mounted in the mounting grooves (210), and being able to change the arrangement of the magnetic steel in the outer rotor (200) so as to change the magnetic field strength in the motor; The gear (300) is detachably sleeved on the outside of the outer rotor (200) and is driven to rotate by the outer rotor (200).

2. The motor with integrated gear according to claim 1, characterized in that: The plurality of mounting grooves (210) are arranged along the circumference of the outer rotor (200), two adjacent mounting grooves (210) are symmetrically staggered, and the angular direction of the two adjacent mounting grooves (210) when formed is toward the center of the outer rotor (200).

3. The motor with integrated gear according to claim 2, characterized in that: The plurality of mounting grooves (210) are arranged in at least two circles in the circumferential direction of the outer rotor (200).

4. The motor with integrated gear according to claim 1, characterized in that: The outer rotor (200) comprises a first housing (220) and a second housing (230); the outer ring diameter of the first housing (220) is smaller than the inner ring diameter of the gear (300); the inner ring of the gear (300) is interference fit with the outer ring of the first housing (220); the outer ring diameter of the second housing (230) is larger than the outer ring diameter of the first housing (220); the second housing (230) is higher than the edge of the first housing (220) to axially limit the gear (300).

5. The motor with integrated gear according to claim 4, characterized in that: The first housing (220) is provided with a positioning block (221), the positioning block (221) extends along the axial direction of the outer rotor (200), and the inner ring of the gear (300) is provided with a positioning groove (310) which is interference-fitted with the positioning block (221).

6. The motor with integrated gear according to claim 5, characterized in that: The number of the positioning blocks (221) is an even number and they are symmetrically arranged on the first housing (220), and the number of the positioning slots (310) is the same as the number of the positioning blocks (221) and corresponds one to one.

7. The motor with integrated gear according to claim 1, characterized in that: The motor further comprises a bearing, the stator (100) is arranged in the middle of the outer rotor (200), and the bearing is arranged between the outer rotor (200) and the stator (100).

8. The motor with integrated gear according to claim 1, characterized in that: The motor further comprises a first end cover (400), a second end cover (500) and a fastener (600), wherein the first end cover (400) is arranged at one end of the outer rotor (200), and the second end cover (500) is arranged at the other end of the outer rotor (200), and the fastener (600) connects the first end cover (400) and the second end cover (500) and fixes the first end cover (400) and the second end cover (500) to the outer rotor (200).

9. An electric drive system, characterized in that: The electric drive system comprises the gear-integrated motor according to any one of claims 1 to 8.

10. An automobile, characterized in that: The automobile comprises the electric drive system as claimed in claim 9.

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