Electric motor, suspension assembly and vehicle

Abstract

An electric motor, a suspension assembly and a vehicle. A magnet assembly comprises a first magnet and a second magnet that are attracted to each other, wherein in a preset direction, a part of the first magnet is in direct contact with a part of the second magnet; and at least one of the first magnet and the second magnet is provided with an adhesive accommodating recess, an adhesive is provided in the adhesive accommodating recess, and the part of the first magnet and the part of the second magnet are fixedly connected by means of the adhesive.

Description

Motors, suspension components and vehicles

[0001] This application claims priority to Chinese patent application No. 202411737855.2, filed on November 27, 2024; Chinese patent application No. 202510291453.2, filed on March 10, 2025; and Chinese patent application No. 202510309082.6, filed on March 14, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of vehicle technology, and more particularly to an electric motor, suspension assembly, and vehicle. Background Technology

[0003] A vehicle includes a body, wheels, and a suspension assembly connecting the body and wheels. The suspension assembly is used to absorb the impact forces transmitted to the body from uneven road surfaces to ensure a smooth ride. In some suspension assemblies, a motor is also included. The motor is used to adjust the stiffness and damping of the suspension assembly in real time according to the vehicle's motion and road conditions to keep the suspension assembly in an optimal damping state. Summary of the Invention

[0004] In a first aspect, an electric motor is provided, the motor comprising a first component and a second component. One of the first component and the second component is movable relative to the other in a predetermined direction; one of the first component and the second component is a stator component, and the other of the first component and the second component is a rotor component.

[0005] Secondly, a suspension assembly is provided, the suspension assembly including the aforementioned motor.

[0006] Thirdly, a vehicle is provided, which may include the aforementioned motor or suspension assembly. Attached Figure Description

[0007] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 is a structural diagram of a vehicle according to some embodiments;

[0009] Figure 2 is a structural diagram of a suspension assembly according to some embodiments;

[0010] Figure 3 is a structural diagram of a motor according to some embodiments;

[0011] Figure 4 is another structural diagram of a motor according to some embodiments;

[0012] Figure 5 is another structural diagram of a motor according to some embodiments;

[0013] Figure 6 is another structural diagram of a motor according to some embodiments;

[0014] Figure 7 is an ideal waveform diagram of the total height of the magnet according to some embodiments;

[0015] Figure 8 is a waveform diagram showing that the total height of the magnet is 0.1 mm longer than the ideal height according to some embodiments;

[0016] Figure 9 is a waveform diagram showing that the total height of the magnet is 0.1 mm shorter than the ideal height according to some embodiments;

[0017] Figure 10 is a waveform diagram showing that the total height of the magnet is 0.2 mm longer than the ideal height according to some embodiments;

[0018] Figure 11 is a waveform diagram showing that the total height of the magnet is 0.2 mm shorter than the ideal height according to some embodiments;

[0019] Figure 12 is a graph showing the variation of the thrust fluctuation of the motor with the total height tolerance of the magnet according to some embodiments;

[0020] Figure 13 is a graph showing the variation of the thrust fluctuation of the motor with the ratio of the rubber groove to the magnet according to some embodiments;

[0021] Figure 14 is a graph showing the variation of the maximum thrust of the motor with the ratio of the rubber groove to the magnet according to some embodiments;

[0022] Figure 15 is another structural diagram of a motor according to some embodiments;

[0023] Figure 16 is a diagram of the structure of another suspension assembly according to some embodiments;

[0024] Figure 17 is a cross-sectional view of the motor in Figure 16;

[0025] Figure 18 is a schematic diagram of the positional relationship between the mandrel and the first bearing when they are in contact according to some embodiments;

[0026] Figure 19 is a simulation diagram of the magnitude of the no-load resistance of the motor when the magnitude of the first distance is different according to some embodiments;

[0027] Figure 20 is a schematic diagram showing the relationship between the second distance and the first and second travel distances according to some embodiments;

[0028] Figure 21 is a schematic diagram of the positional relationship between the mandrel and the first and second bearings when the axial direction of the mandrel is consistent with the preset direction according to some embodiments;

[0029] Figure 22 is a schematic diagram of the positional relationship between the mandrel, the first bearing, and the second bearing when the angle between the axis of the mandrel and the axis of the first bearing is at its maximum according to some embodiments.

[0030] Figure 23 is a structural diagram of the mandrel and the guide member when the guide hole is provided in the guide member according to some embodiments;

[0031] Figure 24 is a schematic diagram showing the positional relationship between the mandrel and the first and second bearings when the difference between the inner diameter of the first bearing and the outer diameter of the mandrel and the difference between the inner diameter of the second bearing and the outer diameter of the guide are equal, according to some embodiments.

[0032] Figure 25 is a schematic diagram showing the positional relationship between the mandrel and the first and second bearings when the difference between the inner diameter of the first bearing and the outer diameter of the mandrel and the difference between the inner diameter of the second bearing and the outer diameter of the guide member are not equal, according to some embodiments.

[0033] Figure 26 is a structural diagram of another suspension assembly according to some embodiments;

[0034] Figure 27 is a cross-sectional view along line AA in Figure 26;

[0035] Figure 28 is a magnified view of a portion of circle B in Figure 27;

[0036] Figure 29 is a structural diagram of a magnet according to some embodiments;

[0037] Figure 30 is a partial structural diagram of a secondary component according to some embodiments;

[0038] Figure 31 is a partial structural diagram of the secondary component shown in Figure 30 when the magnet connection fails;

[0039] Figure 32 is a partial enlarged view of the displacement of the second magnetic sheet shown in Figure 31;

[0040] Figure 33 is a simulation diagram of the magnetic flux density distribution of the magnet in the first dimension according to some embodiments;

[0041] Figure 34 is a simulation diagram of the magnetic flux density distribution of the magnet and the air gap in the first dimension according to some embodiments;

[0042] Figure 35 is a simulation diagram of the magnetic flux density distribution of the magnet in the second dimension according to some embodiments;

[0043] Figure 36 is a simulation diagram of the magnetic flux density distribution of the magnet and the air gap in the second dimension according to some embodiments;

[0044] Figure 37 is a simulation diagram of the magnetic flux density distribution of the magnet in the second dimension according to some embodiments;

[0045] Figure 38 is a simulation diagram of the magnetic flux density distribution of the magnet and the air gap in the second dimension according to some embodiments;

[0046] Figure 39 shows the air gap magnetic flux density distribution curves of the magnet at 0.1 mm on the outer diameter side under the first, second, and third dimensions according to some embodiments.

[0047] Reference numerals: 100, Vehicle; 101, Body; 102, Wheel; 10, Motor; 1, Winding assembly; 2, Magnet assembly; 20, Magnet; 201, First magnet; 21, First sub-magnet; 22, Second sub-magnet; 202, Second magnet; 23, Third sub-magnet; 24, Fourth sub-magnet; 25, Adhesive tank; 251, First adhesive tank; 252, Second adhesive tank; 253, Third adhesive tank; 254, Fourth adhesive tank; 255, Adhesive tank segment; 26, Adhesive; 31, Adhesive layer; 200, Suspension assembly; 11, First assembly; 111A, Mounting hole; 114, Guide member; 1141, Guide rod part; 1142, Chassis part; 115, First bearing; 11A, First limiting part; 11B, Second limiting part; 12, Second component; 121, Mandrel; 121A, Guide hole; 124, Second bearing; 12A, Third limiting part; 12B, Fourth limiting part; 112, Tower top component; 113, Fork arm; 301, Top cover; 40, Elastic element; 1210, Magnet mounting part; 125, Lower support; 131, Secondary component; 132, Magnet; 211, First magnetic sheet; 212, Second magnetic sheet; 213, Third magnetic sheet; 214, First gap; 215, Second gap; 216, Preset inner wall surface; 217, Preset outer wall surface; 3, Center component; 4, Primary component; 4A, Winding component; 411, Mounting hole; 42, Coil; 43, Receiving slot. Detailed Implementation

[0048] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0049] In the description of this disclosure, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in practical applications, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0050] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the meaning of the above terms in this disclosure according to the circumstances.

[0052] In embodiments of this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0053] In this disclosure, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts by way of example.

[0054] In related technologies, the thrust fluctuation of the motor during operation is relatively large, which causes a significant decrease in the maximum thrust and makes it impossible to effectively adjust the stiffness and damping of the suspension components.

[0055] As shown in Figure 1, some embodiments of this disclosure provide a vehicle 100. The vehicle 100 can be a pure electric vehicle 100, a hybrid electric vehicle 100, a plug-in hybrid electric vehicle 100, a range-extended electric vehicle 100, a gasoline-powered vehicle, etc. The vehicle 100 can also be a sedan, truck, bus, lorry, trailer, etc. This disclosure does not limit the scope of the vehicle.

[0056] Vehicle 100 includes a body 101, wheels 102, and a suspension assembly 200 according to some embodiments of the present disclosure. Alternatively, vehicle 100 includes a motor 10 according to some embodiments of the present disclosure. The suspension assembly 200 is connected between the body 101 and the wheels 102, and is configured to cushion the body 101 to improve the comfort of the user driving the vehicle 100.

[0057] As shown in Figures 1 and 2, some embodiments of this disclosure provide a suspension assembly 200, which includes a magnet assembly 2 according to some embodiments of this disclosure; or a motor 10 according to some embodiments of this disclosure. The motor 10 is at least partially disposed on the vehicle body 101, and another part of the motor 10 is connected to the wheel 102. During operation, the vehicle 100 typically encounters uneven road surfaces, causing it to bump and sway. The suspension assembly 200 can cushion the impact on the vehicle 100, thereby improving the stability of the vehicle body 101.

[0058] This disclosure provides a vehicle 100, which includes a magnet assembly 2, a motor 10, or a suspension assembly 200, according to some embodiments of this disclosure.

[0059] Please refer to Figures 3 and 4. Some embodiments of this disclosure provide a motor 10, including a first component and a second component. The first component is reciprocating relative to the second component along a first direction (preset direction). One of the first component and the second component includes a winding component 1, and the other of the first component and the second component includes a magnet component 2 according to some embodiments of this disclosure. The magnet component 2 includes a plurality of magnets 20. At least one of the magnets 20 is provided with a glue-receiving groove 25. The glue-receiving groove 25 is recessed from the surface of the magnet 20 opposite to the winding component 1 toward the surface of the magnet 20 facing the winding component 1, and the glue-receiving groove 25 penetrates at least one end face of the magnet 20 along the preset direction.

[0060] Please refer to Figures 3 and 4. In some embodiments of this disclosure, the magnet assembly 2 includes a plurality of magnets 20. The plurality of magnets 20 includes a first magnet 201 and a second magnet 202 that attract each other. In a predetermined direction, a portion of the first magnet 201 and a portion of the second magnet 202 are in direct contact. At least one of the first magnet 201 and the second magnet 202 is provided with an adhesive groove 25. An adhesive 26 is provided in the adhesive groove 25. The portions of the first magnet 201 and the second magnet 202 are fixedly connected by the adhesive 26 in the adhesive groove 25.

[0061] In some embodiments, the magnet assembly 2 includes a plurality of magnets 20, the plurality of magnets 20 including a first magnet 201 and a second magnet 202. In a preset direction, a portion of the first magnet 201 and a portion of the second magnet 202 are in direct contact. At least one of the first magnet 201 and the second magnet 202 is provided with an adhesive groove 25, and an adhesive 26 is provided in the adhesive groove 25. The portions of the first magnet 201 and the second magnet 202 are fixedly connected by the adhesive 26 in the adhesive groove 25.

[0062] In some embodiments of the motor 10, suspension assembly 200, and vehicle 100 disclosed herein, the motor 10 includes a first assembly and a second assembly. The first assembly is reciprocating relative to the second assembly in a preset direction. One of the first assembly and the second assembly includes a winding assembly 1, and the other of the first assembly and the second assembly includes a magnet assembly 2.

[0063] The magnet assembly 2 includes multiple magnets 20, each of which includes a first magnet 201 and a second magnet 202 that attract each other. In a preset direction, a portion of the first magnet 201 and a portion of the second magnet 202 are in direct contact. At least one of the first magnet 201 and the second magnet 202 is provided with an adhesive groove 25, and an adhesive 26 is provided in the adhesive groove 25. The portions of the first magnet 201 and the second magnet 202 are fixedly connected by the adhesive 26 in the adhesive groove 25. The adhesive 26 tightly connects the multiple magnets 20 at a predetermined position without affecting the position of the magnets 20, ensuring that the relative position between adjacent magnets 20 is accurate, thereby reducing the thrust fluctuation of the linear motor 10.

[0064] Furthermore, by setting adhesive 26 in the adhesive reservoir 25, the amount of adhesive between adjacent magnets 20 can be reduced or eliminated, ensuring that the total size of the stacked multiple magnets 20 and the position of each magnet 20 are accurate and more precise.

[0065] For example, winding assembly 1 can establish a magnetic field by being energized and interact with magnet assembly 2 to achieve reciprocating movement of the first assembly relative to the second assembly in a preset direction. In this process, the first assembly can be a moving assembly and the second assembly can be a stator assembly; or the first assembly can be a stator assembly and the second assembly can be a moving assembly. This disclosure does not limit the specific configuration to meet different needs.

[0066] For example, when the first component is connected to the wheel 102, the second component can be connected to the body 101 through the suspension assembly 200. In this case, the first component is the mover assembly and the second component is the stator assembly.

[0067] In some embodiments, the first component may include a winding component 1, and the second component may also include a magnet component 2; in some embodiments, the first component may include a magnet component 2, and the second component may also include a winding component 1.

[0068] In this way, the motor 10 can be connected to the vehicle body 101 through the suspension assembly 200. With the arrangement of the first and second assemblies, when the vehicle 100 is bumpy and the wheels 102 are impacted and vibrate during driving, the motor 10 can drive the first and second assemblies to move relative to each other to adjust the distance between the vehicle body 101 and the wheels 102, thereby buffering the vehicle body 101, reducing the vibration of the vehicle body 101, and improving the comfort of the user driving the vehicle 100.

[0069] In some embodiments, the vehicle 100 may encounter uneven road surfaces during operation, causing the vehicle 100 to bump and sway. The suspension assembly 200 can cushion the impact of these bumps to improve the stability of the vehicle body 101.

[0070] At this time, the first component of the motor 10 is connected to the vehicle body 101, and the second component is connected to the wheel 102. When the wheel 102 moves vertically relative to the vehicle body 101 as it passes through the road section, the motor 10 can drive the first and second components to move along a preset direction, which is the height direction of the vehicle 100.

[0071] In this way, the distance between the vehicle body 101 and the wheels 102 can be actively adjusted, thereby buffering the vehicle body 101, reducing the vibration of the vehicle body 101, and improving the comfort of the user driving the vehicle 100.

[0072] In some embodiments of this disclosure, the type of motor 10 is not limited to meet different needs.

[0073] In some embodiments of this disclosure, taking a linear motor 10 as an example: the magnet assembly 2 of the motor 10 includes a plurality of magnets 20, which can be arranged along a preset direction. At least one of the plurality of magnets 20 is provided with an adhesive groove 25, which can be filled with adhesive 26. The adhesive 26 has adhesiveness and can realize the positioning connection between adjacent magnets 20, ensuring high positional accuracy between different magnets 20.

[0074] In this way, the adhesive 26 can tightly connect multiple magnets 20 at a predetermined position without affecting the position of the magnets 20. This avoids the situation where the adhesive 26 is applied in the gaps between adjacent magnets 20, causing the magnets 20 to stack in the preset direction and continuously increase in size, which would affect the driving accuracy of the motor 10 and increase the thrust fluctuation of the motor 10.

[0075] In some embodiments of this disclosure, adhesive 26 is filled inside the adhesive reservoir 25. Adhesive 26 can achieve the positioning connection of adjacent magnets 20 and will not overflow into the gaps between magnets 20, ensuring the accurate relative position between adjacent magnets 20, thereby optimizing the thrust fluctuation of the linear motor 10.

[0076] For example, at least one of the magnets 20 forms an adhesive groove 25 facing away from the winding assembly 1. The adhesive groove 25 can be formed by recessing the surface of the magnet 20 facing away from the winding assembly 1 towards the surface of the magnet 20 facing the winding assembly 1. At the same time, the adhesive groove 25 penetrates at least one end face of the magnet 20 along a predetermined direction. That is, when the adhesive 26 is filled in the adhesive groove 25, it can be connected to the adjacent magnet 20 through the penetrating at least one end face, ensuring the relative position between the multiple magnets 20.

[0077] In some embodiments of this disclosure, the distribution position of the adhesive grooves 25 in the plurality of magnets 20 is not limited to meet different requirements.

[0078] Referring to Figure 5, in some embodiments, each magnet 20 is provided with an adhesive groove 25, and each magnet 20 is connected to the previous magnet 20 through the adhesive 26 in the adhesive groove 25, thereby achieving a fixed connection of all magnets 20.

[0079] Referring to Figure 6, in some embodiments, a magnet 20 may be provided with two adhesive grooves 25. Each magnet 20 is provided with an adhesive groove 25 corresponding to the adhesive groove 25 of the adjacent magnet 20, so that the adhesive 26 in the adhesive grooves 25 of the adjacent magnets 20 can be bonded together, thereby realizing the positioning and connection of all magnet components 2.

[0080] In some embodiments, the magnets at both ends are provided with one adhesive groove 25, and the magnet in the middle is provided with two adhesive grooves 25. The adhesive groove 25 of each magnet 20 is provided in correspondence with the adhesive groove 25 of the adjacent magnet 20, so that the adhesive 26 in the adhesive grooves 25 of the adjacent magnets 20 can be bonded together, thereby achieving a fixed connection of all magnets 20.

[0081] Referring to Figure 4, in some embodiments, adhesive grooves 25 can be spaced apart on the magnet 20. That is, a magnet 20 has two adhesive grooves 25, and two adjacent magnets 20 do not have adhesive grooves 25. In this case, the magnet 20 with adhesive grooves 25 can be connected to the two adjacent magnets 20 through the adhesive 26 in the two adhesive grooves 25, thereby achieving a fixed connection of all magnets 20.

[0082] In some embodiments of this disclosure, considering the impact conditions during the actual operation of the motor 10, the irregularly shaped magnets 20 are designed with adhesive grooves 25 for bonding. This effectively ensures the fixation of the magnets 20 between themselves and between themselves and the housing 30, preventing the magnets 20 from falling off and ensuring accurate positioning. In some embodiments of this disclosure, the adhesive grooves 25 of the magnets 20 face the housing 30 direction rather than the stator direction, thus not changing the air gap of the motor 10 and preventing large-scale changes in the electromagnetic thrust.

[0083] Table 1

[0084] Please refer to Table 1 and Figures 7 to 12. Table 1 shows the effect of the total height of multiple magnets 20 in the preset direction on thrust fluctuation under ideal and other conditions.

[0085] Figure 7 shows the ideal waveform when all magnets 20 are in their designed positions. Figure 8 shows the waveform after multiple magnets 20 are stacked together, with their height along the preset direction exceeding the designed height by 0.1 mm. Figure 9 shows the waveform after multiple magnets 20 are stacked together, with their height along the preset direction decreasing by 0.1 mm. Figure 10 shows the waveform after multiple magnets 20 are stacked together, with their height along the preset direction exceeding the designed height by 0.2 mm. Figure 11 shows the waveform after multiple magnets 20 are stacked together, with their height along the preset direction decreasing by 0.2 mm. In Figures 7 to 11, the horizontal axis represents the mover stroke, and the vertical axis represents the thrust fluctuation. Figure 12 shows the thrust fluctuation as a function of the height tolerance along the preset direction after multiple magnets 20 are stacked together.

[0086] It should be noted that the total height of the multiple magnets 20 in the preset direction refers to the dimensions of all magnets 20 along the preset direction. In Figure 12, the horizontal axis represents the total height tolerance of the mover, and the vertical axis represents the thrust fluctuation.

[0087] As shown in Table 1 and Figures 7 to 12, the total height of multiple magnets 20 stacked together has a significant impact on the thrust fluctuation of motor 10. A longer or shorter total height will cause the 6th order fluctuation to decrease while the 2nd order fluctuation to increase.

[0088] Therefore, in order to control the thrust fluctuation of the motor 10, glue storage grooves 25 are designed in the magnets 20 in some embodiments of the present disclosure for storing glue, and the gap between the magnets 20 and the housing 30 can also be used for storing glue. Thus, at the positions where the magnets 20 are in direct contact, the glue bonding process can be avoided, and only glue is used between the glue storage grooves 25.

[0089] This can not only ensure that the magnets 20 will not fall off under impact conditions, ensuring the relative position stability of the magnets 20, but also control the height of each pair of pole magnets 20 and the total height of the rotor magnets 20 within the specified range through selection, achieving the purpose of controlling the thrust fluctuation.

[0090] Please refer to FIGS. 4, 13, and 14. In some embodiments, the ratio of the dimension L2 of the glue storage groove 25 perpendicular to the preset direction to the dimension L1 of the magnet 20 perpendicular to the preset direction satisfies: 0.35 < L2 / L1 < 0.6; the ratio of the dimension B2 of the glue storage groove 25 in the preset direction to the unilateral dimension B1 of the magnet 20 in the preset direction satisfies: 0 < B2 / B1 < 0.15.

[0091] Thus, by restricting the dimensions of the glue storage groove 25 and optimizing the dimension ratio of the glue storage groove 25 to the magnet 20, the optimization of the thrust fluctuation can be achieved without affecting the maximum thrust of the motor 10.

[0092] For example, the ratio L2 / L1 of the dimension L2 of the glue storage groove 25 perpendicular to the preset direction to the dimension L1 of the magnet 20 perpendicular to the preset direction can be 0.4, 0.45, 0.5, 0.55, etc.; the ratio B2 / B1 of the dimension B2 of the glue storage groove 25 in the preset direction to the dimension B1 of the magnet 20 in the preset direction can be 0.025, 0.05, 0.075, 0.1, 0.125, etc.

[0093] In some embodiments, the ratio of the dimension L2 of the glue storage groove 25 perpendicular to the preset direction to the dimension L1 of the magnet 20 perpendicular to the preset direction satisfies: 0.4 < L2 / L1 < 0.55; the ratio of the dimension B2 of the glue storage groove 25 in the preset direction to the unilateral dimension B1 of the magnet 20 in the preset direction satisfies: 0 < B2 / B1 < 0.1.

[0094] For example, please refer to FIGS. 13 and 14. FIG. 13 is a diagram showing the influence of the dimension ratio of the glue storage groove 25 to the magnet 20 on the thrust fluctuation; FIG. 14 is a diagram showing the influence of the dimension ratio of the glue storage groove 25 to the magnet 20 on the maximum thrust. As can be seen from FIG. 13, the smaller the thrust fluctuation, the better, that is, the blue or green part in FIG. 13 is taken; as can be seen from FIG. 14, the larger the thrust fluctuation, the better, that is, the red part in FIG. 14 is taken. Thus, the dimensions of the glue storage groove 25 and the magnet 20 can be limited through FIGS. 13 and 14.

[0095] For example, when the ratio of the dimension of the glue reservoir 25 perpendicular to the preset direction to the dimension of the magnet 20 is 0.4 < L2 / L1 < 0.55, and the ratio of the dimension of the glue reservoir 25 in the preset direction to the dimension of the magnet 20 is 0 < B2 / B1 < 0.1, the thrust fluctuation of the motor 10 is better, and it is better than the thrust fluctuation of 63.2 N in the related art. At the same time, the maximum thrust of the motor 10 will not drop too much.

[0096] In some embodiments of the present disclosure, considering the actual assembly problems in mass production, from the perspective of reducing thrust fluctuation, a reasonable ratio space of the glue reservoir 25 to the magnet 20 is designed to facilitate the glue application process during the installation of the magnet 20, and to prevent poor dimensional control caused by glue between the magnets 20, which may lead to an increase in thrust fluctuation. In addition, in some embodiments of the present disclosure, the magnet 20 is optimized from the perspective of the electromagnetic scheme, which theoretically reduces the thrust fluctuation while preventing the maximum thrust from dropping too much.

[0097] Please refer to FIGS. 4, 13 and 14. In some embodiments, the ratio of the dimension L2 of the glue reservoir 25 perpendicular to the preset direction to the dimension L1 of the magnet 20 perpendicular to the preset direction satisfies: 0 < L2 / L1 < 0.6; the ratio of the dimension B2 of the glue reservoir 25 in the preset direction to the single-side dimension B1 of the magnet 20 in the preset direction satisfies: 0.05 < B2 / B1 < 0.2.

[0098] In this way, by restricting the dimensions of the glue reservoir 25 and optimizing the dimension ratio of the glue reservoir 25 to the magnet 20, the optimization of the thrust fluctuation can be achieved without affecting the maximum thrust of the motor 10.

[0099] For example, the ratio L2 / L1 of the dimension L2 of the glue reservoir 25 perpendicular to the preset direction to the dimension L1 of the magnet 20 perpendicular to the preset direction can be 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, etc.; the ratio B2 / B1 of the dimension B2 of the glue reservoir 25 in the preset direction to the dimension B1 of the magnet 20 in the preset direction can be 0.075, 0.1, 0.125, 0.15, 0.175, etc.

[0100] In some embodiments, the ratio of the dimension L2 of the glue reservoir 25 perpendicular to the preset direction to the dimension L1 of the magnet 20 perpendicular to the preset direction satisfies: 0 < L2 / L1 < 0.55; the ratio of the dimension B2 of the glue reservoir 25 in the preset direction to the single-side dimension B1 of the magnet 20 in the preset direction satisfies: 0.1 < B2 / B1 < 0.15.

[0101] For example, please refer to FIGS. 13 and 14. FIG. 13 is a diagram showing the influence of the ratio of the size of the glue reservoir 25 to the size of the magnet 20 on the thrust fluctuation; FIG. 14 is a diagram showing the influence of the ratio of the size of the glue reservoir 25 to the size of the magnet 20 on the maximum thrust. As can be seen from FIG. 13, the smaller the thrust fluctuation, the better, that is, the blue or green part in FIG. 13 is taken; as can be seen from FIG. 14, the larger the thrust fluctuation, the better, that is, the red part in FIG. 14 is taken. In this way, the sizes of the glue reservoir 25 and the magnet 20 can be limited through FIGS. 13 and 14.

[0102] For example, when the ratio of the size of the glue reservoir 25 perpendicular to the preset direction to the size of the magnet 20 is 0.4 < L2 / L1 < 0.55, and the ratio of the size of the glue reservoir 25 in the preset direction to the size of the magnet 20 is 0 < B2 / B1 < 0.1, the thrust fluctuation of the motor 10 is better, which is better than the thrust fluctuation of 63.2 N in the related art. At the same time, the maximum thrust of the motor 10 will not decrease too much.

[0103] Please refer to FIG. 4. In some embodiments, the cross-section of the glue reservoir 25 along the preset direction is rectangular, triangular or trapezoidal.

[0104] Please refer to FIG. 15. In some embodiments, the glue reservoir 25 is annular, and the glue reservoir 25 is disposed around the periphery of the magnet 20.

[0105] It can be understood that the magnet assembly 2 can be cylindrical or annular cylindrical, which is not limited herein to meet different requirements. For example, when the magnet assembly 2 is cylindrical, the winding assembly 1 is annular cylindrical, and the winding assembly 1 is sleeved on the outer periphery of the magnet assembly 2. Again, when the winding assembly 1 is cylindrical, the magnet assembly 2 is annular cylindrical, and the magnet assembly 2 is sleeved on the outer periphery of the winding assembly 1. It should be noted that in some embodiments of the present disclosure, the type of the magnet 20 is not limited to meet different requirements. For example, the magnet 20 can be a whole ring or a spliced ring.

[0106] In some embodiments of the present disclosure, taking the magnet assembly 2 as an annular cylinder as an example, the magnet 20 itself is annular, so the glue reservoir 25 is annular. And the cross-section of the glue reservoir 25 along the preset direction can be any one of rectangular, triangular and trapezoidal. Of course, the cross-section of the glue reservoir 25 along the preset direction can also be other special shapes, which are not limited herein.

[0107] Please refer to FIG. 15. In some embodiments, the glue reservoir 25 includes a plurality of glue reservoir segments 255 arranged along the circumferential direction of the magnet 20.

[0108] In this way, a plurality of spaced-apart glue reservoir segments 255 can be distributed in the circumferential direction of the magnet 20, which not only ensures the stable amount of the adhesive 26 and can assist in connecting and positioning adjacent magnets 20, but also reduces the influence on the magnetism of the magnet 20.

[0109] In some embodiments, the plurality of magnets 20 are arranged in a Heilbeck configuration.

[0110] In some embodiments, the plurality of magnets 20 include a first sub-magnet 21 and a second sub-magnet 22 alternately arranged along a preset direction. The magnetization direction of the first sub-magnet 21 and the magnetization direction of the second sub-magnet 22 are both parallel to the preset direction, and the magnetization direction of the first sub-magnet 21 is opposite to the magnetization direction of the second sub-magnet 22. At least one of the first sub-magnet 21 or the second sub-magnet 22 is provided with a glue-containing groove 25.

[0111] In some embodiments, the first sub-magnet 21 may be provided with a glue-containing groove 25, while the second sub-magnet 22 may not be provided with a glue-containing groove 25; the first sub-magnet 21 may not be provided with a glue-containing groove 25, while the second sub-magnet 22 may be provided with a glue-containing groove 25; or both the first sub-magnet 21 and the second sub-magnet 22 may be provided with a glue-containing groove 25.

[0112] In some embodiments, the plurality of magnets 20 include a third sub-magnet 23 and a fourth sub-magnet 24 arranged alternately along a preset direction, and the third sub-magnet 23, the first sub-magnet 21, the fourth sub-magnet 24 and the second sub-magnet 22 are in contact in sequence.

[0113] In some embodiments, the first sub-magnet 21 is provided with a first adhesive groove 251 and a second adhesive groove 252. The first adhesive groove 251 and the second adhesive groove 252 are spaced apart along a preset direction. Both the first adhesive groove 251 and the second adhesive groove 252 are recessed from the surface of the first sub-magnet 21 facing away from the winding assembly 1 to the surface of the first sub-magnet 21 facing the winding assembly 1. The first adhesive groove 251 extends away from the second adhesive groove 252 and penetrates one end face of the first sub-magnet 21. The second adhesive groove 252 extends away from the first adhesive groove 251 and penetrates the other end face of the first sub-magnet 21.

[0114] In some embodiments, the second sub-magnet 22 is provided with a third adhesive groove 253 and a fourth adhesive groove 254. The third adhesive groove 253 and the fourth adhesive groove 254 are spaced apart along a preset direction. Both the third adhesive groove 253 and the fourth adhesive groove 254 are recessed from the surface of the second sub-magnet 22 facing away from the winding assembly 1 to the surface of the second sub-magnet 22 facing the winding assembly 1. The third adhesive groove 253 extends away from the fourth adhesive groove 254 and penetrates one end face of the second sub-magnet 22. The fourth adhesive groove 254 extends away from the third adhesive groove 253 and penetrates the other end face of the second sub-magnet 22.

[0115] In some embodiments, the first sub-magnet 21, the third sub-magnet 23, the second sub-magnet 22, and the fourth sub-magnet 24 are in contact in sequence.

[0116] In some embodiments, the first sub-magnet 21, the third sub-magnet 23, the second sub-magnet 22 and the fourth sub-magnet 24 constitute a pair of magnetic poles, and the magnet assembly 2 includes multiple pairs of magnetic poles stacked along a preset direction.

[0117] In some embodiments of this disclosure, the magnet assembly 2 can be a Heilbeck permanent magnet array, that is, the third sub-magnet 23, the first sub-magnet 21, the fourth sub-magnet 24 and the second sub-magnet 22 are arranged in sequence, the magnetization direction of the first sub-magnet 21 and the second sub-magnet 22 is parallel to a preset direction, and the magnetization direction of the third sub-magnet 23 and the fourth sub-magnet 24 is perpendicular to the preset direction.

[0118] Furthermore, the magnetization directions of the first sub-magnet 21 and the second sub-magnet 22 are opposite, as are the magnetization directions of the third sub-magnet 23 and the fourth sub-magnet 24. The four magnets 20 are arranged sequentially to form a pair of magnetic poles. The magnet assembly 2 may include multiple magnetic poles arranged along a preset direction. The magnetization directions of the four magnets 20 in a pair of magnetic poles are rotated 360°.

[0119] The first sub-magnet 21 is provided with a first adhesive groove 251 and a second adhesive groove 252, and the second sub-magnet 22 is provided with a third adhesive groove 253 and a fourth adhesive groove 254. The first adhesive groove 251 extends away from the second adhesive groove 252 and penetrates one end face of the first sub-magnet 21; the second adhesive groove 252 extends away from the first adhesive groove 251 and penetrates the other end face of the first sub-magnet 21; the third adhesive groove 253 extends away from the fourth adhesive groove 254 and penetrates one end face of the second sub-magnet 22; and the fourth adhesive groove 254 extends away from the third adhesive groove 253 and penetrates the other end face of the second sub-magnet 22. Thus, by simply providing adhesive grooves 25 on the first sub-magnet 21 and the second sub-magnet 22, the third sub-magnet 23, the first sub-magnet 21, the fourth sub-magnet 24, and the second sub-magnet 22 can be sequentially connected.

[0120] The first sub-magnet 21 can be connected to the adjacent third sub-magnet 23 through the first adhesive groove 251. The first sub-magnet 21 can be connected to the adjacent fourth sub-magnet 24 through the second adhesive groove 252. The second sub-magnet 22 can be connected to the adjacent fourth sub-magnet 24 through the third adhesive groove 253. The second sub-magnet 22 can be connected to the first sub-magnet 21 in the next magnetic pole through the fourth adhesive groove 254.

[0121] Furthermore, among the four magnets 20 constituting the Heilbeck permanent magnet array, the first sub-magnet 21 and the second sub-magnet 22, whose magnetization direction is parallel to the preset direction, are of relatively low importance. Therefore, the structures of the first sub-magnet 21 and the second sub-magnet 22 are improved, while the structures of the third sub-magnet 23 and the fourth sub-magnet 24 remain unchanged, thus preserving the integrity of the important magnets 20 as much as possible. In this way, the positional accuracy of the magnets 20 of the motor 10 in some embodiments of this disclosure is improved while ensuring that the original thrust of the motor 10 is not significantly affected, thereby reducing the impact of thrust fluctuations.

[0122] In some embodiments, a portion of adjacent magnets 20 is in direct contact, and another portion of adjacent magnets 20 is connected by adhesive 26 in a sump 25; adjacent magnets 20 are attracted to each other by magnetic force.

[0123] In this way, adjacent magnets 20 can be connected by magnetic attraction to achieve a certain positioning, and the adhesive 26 can be used to achieve a stable connection, ensuring the precise position of each magnet 20.

[0124] In some embodiments of this disclosure, the connection method between adjacent magnets 20 is not limited. Adjacent magnets 20 can be in direct contact, connected by adhesive 26 in the adhesive reservoir 25, or partially in direct contact with the other part connected by adhesive 26 in the adhesive reservoir 25, as long as the requirements are met. In some embodiments of this disclosure, the influence of the total length tolerance caused by the adhesive 26 bonding is excluded, and only the tolerance of the magnet 20 itself needs to be considered, which is beneficial for controlling the overall dimensions.

[0125] In some embodiments, the other of the first component and the second component further includes a housing 30, the magnet assembly 2 is disposed within the housing 30, and an adhesive 26 is provided between the housing 30 and at least the adhesive groove 25 of the magnet assembly 2.

[0126] For example, the magnet 20 can be positioned and connected to the housing 30 by the adhesive 26 provided in the adhesive groove 25, thereby making the position of the magnet 20 more accurate. The housing 30 and the magnet assembly 2 can move together with the winding assembly 1 in a preset direction.

[0127] In some embodiments, one of the first component and the second component further includes a mandrel, a winding assembly 1 is disposed on the mandrel, and a portion of the mandrel and the winding assembly 1 are both housed within the housing 30.

[0128] Thus, the housing 30 can act as a protective element to enclose the first and second components. In other words, the housing 30 can protect the winding assembly 1 and the magnet assembly 2, preventing the first and second components from being affected by external impacts, vibrations, dust, etc.

[0129] In some embodiments, the inner wall surface of the housing 30 is provided with an adhesive layer 31, and the magnet 20 is connected to the adhesive layer 31 by an adhesive 26. The size of the adhesive 26 in a direction perpendicular to a preset direction is smaller than the sum of the sizes of the adhesive 26 and the adhesive layer 31.

[0130] Thus, the adhesive layer 31, together with the adhesive 26, can achieve the connection between the magnet 20 and the inner wall of the housing 30, and assist in the fixation and stability after reducing the adhesive layer between the magnets 20, ensuring the stable connection between the magnet 20 and the housing 30.

[0131] In some embodiments of this disclosure, the size and model of the motor 10 are not limited to meet different needs. Furthermore, in some embodiments of this disclosure, the form of the magnet 20 is not limited; the magnet 20 can be a magnetic steel or other magnetic components to meet other requirements.

[0132] In related technologies, motors experience severe wear during operation, resulting in a short motor lifespan and a poor driving experience. To address these issues, this disclosure provides an electric motor in some embodiments.

[0133] As shown in Figure 16, the suspension assembly 200 includes a motor 10, which is connected between the vehicle body 101 and the wheel 102. During the driving of the vehicle 100, the motor 10 can adjust the distance between the vehicle body 101 and the wheel 102 due to the influence of road bumps to ensure the stability of the vehicle body 101.

[0134] The suspension assembly 200 also includes a strut top assembly 112 and a spring. The strut top assembly 112 is connected between the motor 10 and the vehicle body 101 to transmit the force output by the motor 10 to the vehicle body 101, thereby adjusting the distance between the vehicle body 101 and the wheels 102. The spring is used to buffer the transmission of force between the wheels 102 and the vehicle body 101.

[0135] For example, the spring can be a helical spring, an air spring, etc., and the helical spring can be a cylindrical helical spring, which is sleeved around the motor 10. In some other embodiments, the spring can also be a tower spring, a disc spring, etc.

[0136] In some embodiments, as shown in FIG17, which is a cross-sectional view of the motor in FIG16, the motor 10 includes a first component 11 and a second component 12. The second component 12 can move relative to the first component 11 along a preset direction to extend or shorten the motor 10, thereby adjusting the distance between the vehicle body 101 and the wheel 102. The preset direction can be consistent with the height direction of the vehicle 100 or inclined relative to the height direction of the vehicle 100; this disclosure does not limit this.

[0137] In some embodiments, the first component 11 may be connected to the vehicle body 101 and the second component 12 may be connected to the wheel 102, or vice versa.

[0138] For example, the tower top assembly 112 is connected between one of the first assembly 11 and the second assembly 12 and the vehicle body 101, and the spring is connected between the first assembly 11 and the second assembly 12.

[0139] In some embodiments, as shown in FIG17, the suspension assembly 200 further includes a wishbone 113, which is connected between the other of the first assembly 11 and the second assembly 12 and the wheel 102 to realize the connection between the motor 10 and the wheel 102, thereby realizing the transmission of the force output by the motor 10.

[0140] For ease of subsequent description, the following description will take the example of the first component 11 being adapted to connect to the wheel 102 and the second component 12 being adapted to connect to the body 101. This should not be considered as a limitation on the structure of this disclosure.

[0141] In some embodiments, as shown in FIG17, the second component 12 further includes a magnetic structure housed within the housing 111.

[0142] For example, the magnetic structure may include a winding assembly 1. In this case, the first assembly 11 may include a housing 111 and a magnet assembly 112. The magnet assembly 2 is disposed on and fixed to the housing 111. The winding assembly 1 cooperates with the magnet assembly 2 to drive the second assembly 12 to move relative to the first assembly 11.

[0143] For example, the magnetic structure may also include a magnet assembly 2, in which case the first assembly 11 may include a winding assembly 1, and the second assembly 12 may be moved relative to the first assembly 11 through the cooperation of the winding assembly 1 and the magnet assembly 2.

[0144] For ease of subsequent description, the following description will take the magnetic structure including the winding assembly 1 as an example.

[0145] For example, the magnet assembly 2 can be a permanent magnet, an electromagnet, an energized coil, etc.

[0146] With the above settings, after the winding assembly 1 is energized, the winding assembly 1 will generate a magnetic field, and the magnet assembly 2 will also generate a magnetic field. The magnetic field generated by the winding assembly 1 and the magnetic field generated by the magnet assembly 2 can interact with each other and generate a force in a preset direction, thereby pushing the winding assembly 1 to move relative to the magnet assembly 2 in a preset direction, so as to realize the relative movement of the first assembly 11 and the second assembly 12.

[0147] In some embodiments, the length of the magnet assembly 2 in a predetermined direction is the same as the length of the winding assembly 1 in a predetermined direction. This ensures the interaction strength between the magnet assembly 2 and the winding assembly 1, increases the magnitude of the force between them, and further ensures the relative movement of the first assembly 11 and the second assembly 12.

[0148] Based on the above, in some embodiments, as shown in FIG17, the second component 12 further includes at least one iron core 123, the at least one iron core 123 is fixed to the spindle 121, and the winding component 1 is disposed on the at least one iron core 123.

[0149] With the above settings, after the winding assembly 1 is energized, the iron core 123 can increase the strength of the magnetic field generated by the winding assembly 1, thereby increasing the force between the first assembly 11 and the second assembly 12, so as to improve the thrust of the motor 10.

[0150] In some examples, the housing 111 is cylindrical in shape, and the spindle 121, iron core 123 and winding assembly 1 are cylindrical or disc-shaped to fit the cylindrical structure.

[0151] As shown in Figure 17, the first component 11 further includes a first bearing 115, and the housing 111 has a mounting hole 111A at one end along a preset direction. The first bearing 115 is accommodated in the mounting hole 111A. The second component 12 includes a spindle 121, which is fixed to the winding assembly 1 and can slide through the first bearing 115.

[0152] It is understandable that the axial direction of the first bearing 115 is aligned with the preset direction to restrict the movement of the spindle 121 in the preset direction, thereby restricting the movement of the second component 12 relative to the first component 11 in the preset direction.

[0153] There is a certain gap between the first bearing 115 and the spindle 121 to avoid jamming between the first bearing 115 and the spindle 121 due to thermal expansion and contraction, which would cause excessive friction between the spindle 121 and the first bearing 115 and affect the operation of the motor 1.

[0154] However, during the operation of the motor 10, the magnetic field generated by the winding assembly 1 after being energized is unstable and fluctuates. This causes the winding assembly 1 to be subjected to an electromagnetic force along the radial direction of the first bearing 115, which causes the axis of the spindle 121 to tilt relative to the axis of the first bearing 115. As the distance of the second assembly 12 relative to the first assembly 11 increases, the radial force will continue to increase, and the angle of deflection of the axis of the spindle 121 relative to the axis of the first bearing 115 will also increase, which will cause the spindle 121 to contact the first bearing 115, resulting in friction between the spindle 121 and the first bearing 115.

[0155] Furthermore, research has revealed that, as shown in Figure 18, which is a schematic diagram of the positional relationship between the mandrel and the first bearing when they are in contact according to some embodiments, the greater the angle at which the axis of the mandrel 121 deflects relative to the axis of the first bearing 115, the greater the frictional force between the mandrel 121 and the first bearing 115.

[0156] Furthermore, since the spindle 121 and the winding assembly 1 are tilted, the radial electromagnetic force on the winding assembly 1 will increase, thereby further increasing the friction between the spindle 121 and the first bearing 115.

[0157] This will increase the frictional force on the second component 12 when it moves relative to the first component 11, thereby affecting the normal extension or shortening of the motor 10, and causing wear on the spindle 121 and the first bearing 115, thus shortening the service life of the motor 10.

[0158] To avoid the above problems, it is necessary to limit the angle at which the axis of the spindle 121 can deflect relative to the axis of the first bearing 115.

[0159] To address this, we first analyze the factors that affect the angle of deflection of the axis of the spindle 121 relative to the axis of the first bearing 115.

[0160] Analysis shows that since the second bearing 124 is located on the spindle 121 and the first bearing 115 is located on the housing 111, the distance between the first bearing 115 and the second bearing 124 will change as the first component 11 and the second component 12 move relative to each other.

[0161] As shown in Figure 17, the second component 12 can move between a first position and a second position relative to the first component 11. The length of the motor 10 when the second component 12 is in the first position is the first length, and the length of the motor 10 when the second component 12 is in the second position is the second length. The first length is less than the second length.

[0162] It is understandable that when the second component 12 is in the first position, the motor 10 is at its compression limit, and the length of the motor 10 is the smaller first length. When the second component 12 is in the second position, the motor 10 is at its tension limit, and the length of the motor 10 is the larger second length.

[0163] When the second component 12 is in the second position, that is, when the motor 10 is at its tensile limit, the distance between the first bearing 115 and the second bearing 124 reaches its minimum value. At this time, the axis of the spindle 121 can deflect at the maximum angle relative to the axis of the first bearing 115.

[0164] Based on this, some embodiments of this disclosure simulate the no-load resistance of the motor 10 when the distance between the first bearing 115 and the second bearing 124 is of different sizes (the no-load resistance of the motor 10 refers to the force that prevents relative movement generated between the first component 11 and the second component 12 during relative movement when the motor 10 is in a no-load state, that is, when no current is applied).

[0165] As shown in Figures 19 and 20, Figure 19 is a simulation diagram of the magnitude of the no-load resistance of the motor when the magnitude of the first distance is different according to some embodiments, and Figure 20 is a schematic diagram of the relationship between the second distance, the first stroke, and the second stroke according to some embodiments. The second distance S1 is the sum of the stroke of the second component 12 moving from the first position to the second position and the height of the winding component 1 in the preset direction.

[0166] The distance between the first bearing 115 and the second bearing 124 is the first distance H0.

[0167] In some embodiments, the second distance S1 = 302 mm. Curve A1 shows the change in the no-load resistance of the motor 10 during the movement of the second component 12 when the minimum value of the first distance H0 is 115 mm. Curve A2 shows the change in the no-load resistance of the motor 10 during the movement of the second component 12 when the minimum value of the first distance H0 is 155 mm. Curve A3 shows the change in the no-load resistance of the motor 10 during the movement of the second component 12 when the minimum value of the first distance H0 is 193 mm.

[0168] As can be seen from Figure 19, when other parameters remain unchanged, during the displacement of motor 10, i.e., the movement of the second component 12 relative to the first component 11, as the minimum value of the first distance H0 increases, the no-load resistance experienced by motor 10 during displacement gradually decreases, and the fluctuation of the no-load resistance of motor 10 also becomes smaller. It can be seen that as the minimum value of the first distance H0 increases, after the axis of spindle 121 deflects relative to the axis of the first bearing 115, the frictional force and the electromagnetic force in the direction perpendicular to the preset direction experienced by the second component 12 will decrease accordingly.

[0169] Therefore, some embodiments of this disclosure also limit the distance between the first bearing 115 and the second bearing 124 when the second component 12 is in the second position:

[0170] The second distance S1 and the first distance H0 satisfy: H0≥2 / 5S2.

[0171] In this way, by ensuring that the second distance S1 and the first distance H0 satisfy H0≥2 / 5S1, it is possible to avoid the excessively small distance between the first bearing 115 and the second bearing 124, which would cause the axis of the spindle 121 to deflect too much relative to the axis of the first bearing 115. This also prevents the second component 12 from deflecting too much relative to the first component 11. This reduces the friction between the spindle 121 and the first bearing 115, as well as the friction between the second bearing 124 and the guide member 114, on the elongation or shortening of the motor 10. Furthermore, it reduces the wear of the first bearing 115, the spindle 121, the second bearing 124, and the guide member 114, thereby reducing the magnitude of the friction between the first component 11 and the second component 12. This ensures the normal operation of the motor 10, reduces the wear of the first component 11 and the second component 12, and extends the service life of the motor 10.

[0172] Here, the second distance S1 can be considered as the maximum distance that the winding component 1 can reach during the relative movement of the second component 12 and the first component 11.

[0173] Along the direction from the first position to the second position, the winding assembly 1 has a first end and a second end opposite to each other. When the second assembly 12 is in the first position, the position of the first end of the winding assembly 1 is the third position. When the second assembly 12 is in the second position, the position of the second end of the winding assembly 1 is the fourth position, and the distance between the third position and the fourth position is the second distance S1.

[0174] Alternatively, as shown in Figure 20, when the vehicle 100 is stationary, the position of the second component 12 relative to the first component 11 is the zero point position. During the process of the second component 12 moving from the zero point position to the second position, the distance that the first end and the second end of the winding component 1 move is the first stroke S11 (the extension stroke of the motor 10). During the process of the second component 12 moving from the zero point position to the first position, the distance that the first end and the second end of the winding component 1 move is the second stroke S12 (the compression stroke of the motor 10).

[0175] Thus, the distance between the third and fourth positions can be considered as the sum of the distance between the first and second ends of the winding assembly (i.e., the dimension L of the winding assembly 1 in the preset direction), the distance the first end of the winding assembly moves when the winding moves from the second position to the first position (i.e., the maximum stroke of the winding assembly, which is also the sum of the first stroke S11 and the second stroke S12), and the second distance S1 = S11 + S12 + L.

[0176] The distance between the first bearing 115 and the second bearing 124 can be the distance between the side surface of the first bearing 115 facing the second bearing 124 and the side surface of the second bearing 124 facing away from the first bearing 115.

[0177] Alternatively, it can be the distance between the side surface of the first bearing 115 facing the second bearing 124 and the side surface of the second bearing 124 facing the first bearing 115.

[0178] Alternatively, it can be the distance between the side surface of the first bearing 115 facing away from the second bearing 124 and the side surface of the second bearing 124 facing away from the first bearing 115.

[0179] Alternatively, it can be the distance between the center plane of the first bearing 115 and the center plane of the second bearing 124. The center plane of the first bearing 115 is a plane that is equidistant from the end faces of the first bearing 115 on both sides in a preset direction, and the center plane of the second bearing 124 is a plane that is equidistant from the end faces of the second bearing 124 on both sides in a preset direction.

[0180] It is understood that the above embodiment limits the size of the first distance H0 by the maximum stroke of the winding assembly 1.

[0181] In some other embodiments, the size of the first distance H0 can be defined by the first component 11.

[0182] For example, the housing 111 is formed with a cylindrical body, and the winding assembly 1 is disposed inside the cylindrical body. The length of the cylindrical body in a predetermined direction is a third distance S2, and the third distance S2 and the first distance H0 satisfy: H0≥2 / 5S2.

[0183] Here, the cylinder is the side wall of the cavity formed inside the housing 111, and the length of the cylinder in the preset direction is the distance between the two opposite side walls of the cavity inside the housing 111 that forms the cylinder in the preset direction.

[0184] Since the winding assembly moves within the cylinder 122, the cylinder 122 can limit the stroke of the winding assembly 1, thereby limiting the size of the first distance H0. This prevents the distance between the first bearing 115 and the second bearing 124 from being too small, reduces the friction between the spindle 121 and the first bearing 115 and the friction between the second bearing 124 and the guide member 114, and extends the service life of the motor 10.

[0185] In some other embodiments, the first component 11 further includes a first limiting part 11A and a second limiting part 11B, which are located on opposite sides of the cylinder in a preset direction.

[0186] When the second component 12 is in the first position, the second limiting part 11B engages with the second component 12 for limiting; when the second component 12 is in the second position, the first limiting part 11A engages with the second component 12 for limiting.

[0187] In this way, during the movement of the second component 12 relative to the first component 11, the first limiting part 11A and the second limiting part 11B can limit the second component 12, restrict the stroke of the second component 12, and prevent the winding component 1 inside the cylinder from directly contacting the cylinder and colliding when the second component 12 moves to the first position or the second position, so as to ensure the normal function of the winding component.

[0188] In the above situation, the travel of the winding assembly 1 can be limited by the first limiting part 11A and the second limiting part 11B. Thus, the size of the first distance H0 can be limited by the first limiting part 11A and the second limiting part 11B, so that the distance between the first limiting part 11A and the second limiting part 11B is the fourth distance S3. The fourth distance S3 and the first distance H0 satisfy: H0≥2 / 5S3.

[0189] This can also reduce the impact of friction between spindle 121 and first bearing 115 and friction between second bearing 124 and guide member 114 on the elongation or shortening of motor 10, and extend the service life of motor 10.

[0190] Here, the distance between the first limiting part 11A and the second limiting part 11B can be the distance between the side surface of the first limiting part 11A facing the second limiting part 11B and the side surface of the second limiting part 11B facing away from the first limiting part 11A.

[0191] Alternatively, it can be the distance between the side surface of the first limiting part 11A facing the second limiting part 11B and the side surface of the second limiting part 11B facing the first limiting part 11A.

[0192] Alternatively, it can be considered as the distance between the side surface of the first limiting part 11A facing away from the second limiting part 11B and the side surface of the second limiting part 11B facing away from the first limiting part 11A.

[0193] Alternatively, it can be the distance between the center plane of the first limiting part 11A and the center plane of the second limiting part 11B. The center plane of the first limiting part 11A is a plane that is equidistant from the end faces of the first bearing 115 on both sides in a preset direction, and the center plane of the second limiting part 11B is a plane that is equidistant from the end faces of the second limiting part 11B on both sides in a preset direction.

[0194] Based on this, in some embodiments, the second distance S1 and the first distance H0 satisfy: H0≥1 / 2S1.

[0195] In this way, compared to the second distance S1 and the first distance H0 satisfying: H0≥2 / 5S1, the second distance S1 and the first distance H0 satisfying: H0≥1 / 2S1, can further reduce the angle that the axis of the spindle 121 can deflect relative to the axis of the first bearing 115, further reduce the friction between the spindle 121 and the first bearing 115 and the friction between the second bearing 124 and the guide member 114, ensure the normal extension or shortening of the motor 10, and further extend the service life of the motor 10.

[0196] In some other embodiments, the third distance S2 and the first distance H0 satisfy: H0≥1 / 2S2. In still other embodiments, the fourth distance S3 and the first distance H0 satisfy: H0≥1 / 2S3. These will not be elaborated further here.

[0197] In addition, by defining the relationship between the second distance S1, the third distance S2 or the fourth distance S3 and the first distance H0, the maximum included angle between the axis of the spindle 121 and the axis of the first bearing 115 can be defined.

[0198] It should be noted that the maximum included angle refers to the maximum angle at which the axis of the spindle 121 deflects relative to the axis of the first bearing 115 during the movement of the second component 12 relative to the first component 11. That is, when the second component 12 is in the second position, the distance between the first bearing 115 and the second bearing 124 is the smallest, and at this time, the axis of the spindle 121 deflects relative to the axis of the first bearing 115 at the maximum angle.

[0199] In some embodiments, the maximum included angle between the axis of the mandrel 121 and the axis of the first bearing 115 is θ, where θ ≤ 0.05°.

[0200] By setting the above, the maximum included angle between the axis of the spindle 121 and the axis of the first bearing 115 is limited within this range, which can prevent the axis of the spindle 121 from rotating too much relative to the axis of the first bearing 115. This reduces the magnitude of the frictional force when one end of the spindle 121 and the first bearing 115 come into contact during the movement of the spindle 121 relative to the first bearing 115, and reduces the influence of the frictional force between the spindle 121 and the first bearing 115 on the elongation or shortening of the motor 10.

[0201] Furthermore, by reducing the friction between the spindle 121 and the first bearing 115, the wear of the spindle 121 and the first bearing 115 can be reduced, thereby extending the service life of the motor 10.

[0202] Based on this, in some embodiments, the maximum included angle θ satisfies: θ≤0.02°.

[0203] With the above settings, compared to the maximum included angle satisfying θ≤0.05°, when the maximum included angle θ satisfies θ≤0.02°, during the movement of the second component 12 relative to the first component 11, the maximum value of the angle of deflection of the axis of the spindle 121 relative to the axis of the first bearing 115 is smaller. In this way, the magnitude of the frictional force experienced by the spindle 121 when one end of the spindle 121 and the first bearing 115 come into contact during the movement of the spindle 121 relative to the first bearing 115 can be further reduced, thereby further reducing the influence of the frictional force between the spindle 121 and the first bearing 115 on the elongation or shortening of the motor 10, and further extending the service life of the motor 10.

[0204] It should be noted that only a first bearing 115 is provided between the mandrel 121 and the first assembly 11 (that is, only one bearing is provided between the first assembly 11 and the second assembly 12). When the angle of deflection of the axis of the mandrel 121 relative to the axis of the first bearing 115 reaches its maximum value, as shown in Figure 18, if the axis of the mandrel 121 (the dotted line 1211 shown in Figure 18) is deflected to the first side relative to the axis of the first bearing 115 (the dotted line 1151 shown in Figure 18), then the surface of the mandrel 121 on one side of the axis of the first bearing 115 abuts against the portion of the first end of the first bearing 115 located on the first side (point A shown in Figure 18). The first end of the first bearing 115 is one of the two ends of the first bearing 115 that are opposite each other in a preset direction.

[0205] The mandrel 121 abuts against the portion of the second end of the first bearing 115 located on the second side of the axis of the first bearing 115 (the side opposite to the first side relative to the axis of the bearing) at the second side (point B shown in FIG18). The second end of the first bearing 115 is the other end of the two ends of the first bearing 115 that are opposite each other in a predetermined direction.

[0206] In other embodiments, as shown in FIG17, the first component 11 further includes a guide 114, which is fixed relative to the housing 111.

[0207] The spindle 121 has a guide hole 121A, and the guide member 114 is housed in the guide hole 121A. When the second component 12 moves relative to the first component 11, the guide member 114 moves within the guide hole 121A.

[0208] With the above configuration, since the guide member 114 moves within the guide hole 121A, when the second component 12 moves relative to the first component 11, the guide member 114 can restrict the spindle 121 from moving radially along the guide member 114, thereby guiding the spindle 121 to ensure that the spindle 121 moves in a preset direction, thereby restricting the second component 12 from moving relative to the first component 11 in a preset direction.

[0209] As shown in Figure 17, the second component 12 also includes a second bearing 124, which is disposed in the guide hole 121A, and the guide member 114 is slidably disposed in the second bearing 124.

[0210] In this way, the second bearing 124 can reduce the friction between the guide 114 and the spindle 121, thereby reducing the resistance encountered by the second component 12 when it moves relative to the first component 11, ensuring the normal extension or shortening of the motor 10, and reducing the wear of the spindle 121 and the guide 114, thus extending the service life of the motor 10.

[0211] It should be noted that, under the above circumstances, as shown in Figures 21 and 22, Figure 21 is a schematic diagram of the positional relationship between the mandrel and the first bearing and the second bearing when the axial direction of the mandrel is consistent with the preset direction according to some embodiments, and Figure 22 is a schematic diagram of the positional relationship between the mandrel and the first bearing and the second bearing when the angle between the axis of the mandrel and the axis of the first bearing is the maximum angle according to some embodiments. A first bearing 115 and a second bearing 124 are provided between the mandrel 121 and the first component 11 (that is, two bearings are provided between the first component 11 and the second component 12).

[0212] When the angle of deflection of the axis of the spindle 121 relative to the axis of the first bearing 115 reaches its maximum value, assuming that the axis of the spindle 121 deflects to the first side relative to the axis of the first bearing 115, then the surface of the spindle 121 on one side of the axis of the first bearing 115 abuts against the portion of the third end of the first bearing 115 located on the first side (point C shown in Figure 22). The third end of the first bearing 115 is the end of the first bearing 115 that is opposite to the second bearing 124 (the third end of the first bearing 115 mentioned here and the first end of the first bearing 115 mentioned above can be the same end or two opposite ends).

[0213] The guide member 114 abuts against the portion of the first end of the second bearing 124 located on the second side of the axis of the first bearing 115 (point D shown in FIG22), the first end of the second bearing 124 being the end of the second bearing 124 facing away from the first bearing 115.

[0214] It is understandable that when the number of bearings between the first component 11 and the second component 12 is greater than two, such as three, four, or five, after the axis of the mandrel 121 is deflected relative to the axis of the first bearing 115, the mandrel 121 will abut against at least two of the multiple bearings.

[0215] For example, the guide member 114 can be a guide post, which can be a cylinder, prism, etc.

[0216] For example, as shown in FIG17, the guide member 114 includes a guide rod portion 1141 and a chassis portion 1142. The chassis portion 1142 is connected to the housing 111, and the guide rod portion 1141 is connected to the chassis portion 1142 and can slide through the second bearing 124.

[0217] With the above configuration, the guide rod 1141 can be fixed to the housing 111 via the chassis 1142, thereby guiding the spindle 121.

[0218] In some examples, the housing 111 has an opening, the chassis portion 1142 is connected to the opening and seals the opening, and the fork arm 113 is connected to the chassis portion 1142.

[0219] As shown in Figures 17 and 20, the second component 12 also includes a third limiting part 12A and a fourth limiting part 12B, which are connected to both sides of the winding component 1 in a preset direction.

[0220] In this way, the winding assembly 1 can be protected by the third limiting part 12A and the fourth limiting part 12B, so as to prevent the winding assembly 1 inside the cylinder from directly contacting the cylinder and causing collision when the second assembly 12 moves to the first position or the second position, thus ensuring the normal function of the winding assembly.

[0221] Based on this, the first limiting part 11A, the third limiting part 12A, the fourth limiting part 12B and the second limiting part 11B are arranged in sequence along the direction from the first bearing 115 to the second bearing 124.

[0222] This allows the first limiting part 11A, the third limiting part 12A, the fourth limiting part 12B, and the second limiting part 11B to jointly limit the second component 12, further preventing the winding component 1 from colliding with the cylinder.

[0223] For example, the first limiting part 11A and the third limiting part 12A can be arranged alternately, and the fourth limiting part 12B and the second limiting part 11B can be arranged alternately, that is, the first limiting part 11A, the third limiting part 12A, the fourth limiting part 12B and the second limiting part 11B can all contact the cylinder and the winding assembly 1 at the same time.

[0224] For example, when the second component 12 is in the first position, the fourth limiting part 12B and the second limiting part 11B are engaged in a limiting engagement. When the second component 12 is in the second position, the first limiting part 11A and the third limiting part 12A are engaged in a limiting engagement.

[0225] With the above settings, when the second component 12 moves to the first position, the fourth limiting part 12B and the second limiting part 11B contact each other to limit the compression limit of the motor 10 and buffer the second component 12. When the second component 12 moves to the second position, the first limiting part 11A and the third limiting part 12A can limit the extension limit of the motor 10 and also buffer the second component 12.

[0226] It should be noted that during the actual operation of the motor 10, when the second component 12 is in the second position, the first limiting part 11A and the third limiting part 12A may undergo certain deformation after contact. Alternatively, when the second component 12 is in the second position, the first limiting part 11A may not contact the second component 12, and may only limit the second component 12 when the motor malfunctions or the second component 12 moves too far.

[0227] Therefore, the position of the second component 12 when the motor 10 is at its tensile limit is actually the position when the speed of the second component 12 is zero during the stretching process relative to the first component 11, rather than the position defined when the first limiting part 11A and the second limiting part 11B are in contact but there is no force between them interacting.

[0228] Similarly, when the motor 10 is at its compression limit, the position of the second component 12 is actually the position when the speed of the second component 12 relative to the first component 11 is zero during the compression process, rather than the position defined by the surface of the second limiting part 11B facing the second bearing 124.

[0229] Therefore, when measuring the first stroke S11 and the second stroke S12, the first stroke S11 and the second stroke S12 should be measured at the position where the speed of the second component 12 relative to the first component 11 is zero.

[0230] For example, at least one of the first limiting portion 11A and the third limiting portion 12A can be a rigid member or a flexible member. When it is a flexible member, it can be made of rubber. For example, the first limiting portion 11A and the third limiting portion 12A can both be rigid members, or both can be flexible members, or one can be a rigid member and the other a flexible member.

[0231] For example, at least one of the second limiting portion 11B and the fourth limiting portion 12B can be a rigid member or a flexible member. When it is a flexible member, it can be made of rubber. For example, the second limiting portion 11B and the fourth limiting portion 12B can both be flexible members, or both can be rigid members, or one can be a rigid member and the other a flexible member.

[0232] For example, the first limiting part 11A can be a part on the first component 11, such as the top wall of the housing 111, and the third limiting part 12A can be a part on the second component 12, such as the top wall of the winding assembly 1.

[0233] Similarly, the fourth limiting part 12B can be a part on the second component 12, and the second limiting part 11B can be a part on the first component 11.

[0234] As long as the first limiting part 11A, the second limiting part 11B, the third limiting part 12A, and the fourth limiting part 12B can limit the first component 11 and the second component 12, it is sufficient.

[0235] In addition, research has found that the difference between the inner diameter of the first bearing 115 and the outer diameter of the spindle 121 also affects the maximum value of the included angle θ. As shown in Figure 17, when the difference between the inner diameter of the first bearing 115 and the outer diameter of the spindle 121 increases, the movable distance of the spindle 121 within the first bearing 115 along the radial direction of the first bearing 115 increases, which leads to an increase in the angle at which the axis of the spindle 121 can deflect relative to the axis of the first bearing 115, resulting in an increase in the maximum included angle θ.

[0236] Based on this, some embodiments of this disclosure also specify the difference between the inner diameter of the first bearing 115 and the outer diameter of the spindle 121:

[0237] The difference X between the inner diameter of the first bearing 115 and the outer diameter of the spindle 121 satisfies: 20μm≤X≤80μm.

[0238] With the above settings, compared to the difference X between the inner diameter of the first bearing 115 and the outer diameter of the spindle 121 satisfying: X > 80 μm or X < 20 μm, when the difference X between the inner diameter of the first bearing 115 and the outer diameter of the spindle 121 satisfies: 20 μm ≤ X ≤ 80 μm, the difference between the inner diameter of the first bearing 115 and the outer diameter of the spindle 121 is smaller. This results in a smaller movable distance of the spindle 121 within the first bearing 115 along the radial direction of the first bearing 115, so that the maximum included angle θ satisfies: θ ≤ 0.05°. In addition, it can also ensure that there is a certain gap between the spindle 121 and the first bearing 115, so as to facilitate the assembly of the spindle 121 and the first bearing 115.

[0239] Similarly, some embodiments of this disclosure also limit the difference between the inner diameter of the second bearing 124 and the outer diameter of the guide 114: the difference Y between the inner diameter of the second bearing 124 and the outer diameter of the guide 114 satisfies: 20μm≤Y≤80μm.

[0240] With the above settings, compared to the difference Y between the inner diameter of the second bearing 124 and the outer diameter of the guide member 114 satisfying: Y > 80 μm or Y < 20 μm, when the difference Y between the inner diameter of the second bearing 124 and the outer diameter of the guide member 114 satisfies: 20 μm ≤ Y ≤ 80 μm, the difference between the inner diameter of the second bearing 124 and the outer diameter of the guide member 114 is smaller, thus making the radial movable distance of the second bearing 124 along the guide member 114 smaller, so that the maximum included angle θ satisfies: θ ≤ 0.05°. In addition, it can also ensure that there is a certain gap between the guide member 114 and the second bearing 124, so as to facilitate the assembly of the guide member 114 and the second bearing 124.

[0241] For example, the difference in outer diameter X and the difference in outer diameter Y can be equal or unequal.

[0242] In some other embodiments, as shown in FIG23, FIG23 is a structural diagram of the mandrel and the guide member when the guide hole is provided in the guide member according to some embodiments. The guide hole 121A is provided in the guide member 114, and the mandrel 121 is slidably passed through the second bearing 124.

[0243] For ease of description, the method for calculating the maximum included angle θ will be described below using the above embodiment as an example:

[0244] In some examples, as shown in Figure 24, which is a schematic diagram illustrating the positional relationship between the mandrel and the first and second bearings 124 when the difference between the inner diameter of the first bearing and the outer diameter of the mandrel, and the difference between the inner diameter of the second bearing and the outer diameter of the guide member, are equal according to some embodiments, Figure 24 shows the positional relationship when the mandrel contacts the first bearing and the second bearing 124. Let X be Δ, and the diameter of the mandrel 121 be D. The first bearing 115 faces away from the second bearing. The distance between one end of bearing 124 and the end of the second bearing 124 opposite to the first bearing 115 is H; the distance between the cross-section of the center of the first bearing 115 along the preset direction and the cross-section of the center of the second bearing 124 along the preset direction is H0; the dimension of the first bearing 115 in the preset direction is H1; the dimension of the second bearing 124 in the preset direction is H2; the radial movement distance of the spindle 121 in the first bearing 115 is M; the axial offset distance of the spindle 121 is N; therefore, we can obtain: N 2 +D 2 = (D + 2Δ - M) 2

[0245] From this, the magnitude of the maximum included angle θ can be calculated.

[0246] For example, when the distance between the first bearing 115 and the second bearing 124 is the distance between the surface of the first bearing 115 facing the second bearing 124 and the surface of the second bearing 124 facing away from the first bearing 115, i.e., H0 = H, then the maximum included angle θ is:

[0247] In some examples, as shown in Figure 25, which is a schematic diagram of the positional relationship between the mandrel 121 and the first bearing 115 and the second bearing 124 when the difference X between the inner diameter of the first bearing 115 and the outer diameter of the mandrel 121 and the difference Y between the inner diameter of the second bearing 124 and the outer diameter of the guide member 114 are not equal, when the difference X between the inner diameter of the first bearing 115 and the outer diameter of the mandrel 121 and the difference Y between the inner diameter of the second bearing 124 and the outer diameter of the guide member 114 are not equal, and the radial dimension of the first bearing 115 is greater than the radial dimension of the second bearing 124, let X be 2P and Y be 2Q, then P > Q. The distance between the end of the first bearing 115 facing away from the second bearing 124 and the end of the second bearing 124 facing away from the first bearing 115 is H. The distance between the cross-section of the center of the first bearing 115 along the predetermined direction and the cross-section of the center of the second bearing 124 along the predetermined direction is H0. The dimension of the first bearing 115 in the predetermined direction is H1, and the dimension of the second bearing 124 in the predetermined direction is H2. Therefore, we can obtain:

[0248] From this, the magnitude of the maximum included angle θ can be calculated.

[0249] Similarly, when the distance between the first bearing 115 and the second bearing 124 is the distance between the surface of the first bearing 115 facing the second bearing 124 and the surface of the second bearing 124 facing away from the first bearing 115, i.e., H0 = H, then the maximum included angle θ is:

[0250] In some embodiments, the first component 11 further includes a seal, which is disposed between the inner wall surface of the mounting hole 111A and the outer peripheral surface of the spindle 121 and is fixed to the housing 111. The spindle 121 is slidably fitted to the seal.

[0251] For example, the seal can be an oil seal, a sealing ring, etc.

[0252] By setting the seal, external impurities can be prevented from entering the housing 111 through the gap between the inner wall of the mounting hole 111A and the spindle 121, thus affecting the performance of the motor 10 and ensuring the normal function of the motor 10.

[0253] Typically, an electric motor consists of a mover and a stator, with the mover comprising magnets. To improve motor performance, larger magnets are usually required to increase magnetic conductivity. In related technologies, spliced ​​magnet rings are typically composed of multiple separately arranged magnetic sheets joined together. However, during use, the magnetic sheets in a magnet composed of multiple spliced ​​sheets can detach due to impacts, vibrations, or other factors, causing abnormal motor operation.

[0254] To address the aforementioned problems, this disclosure provides a vehicle 100 in some embodiments. As shown in FIG1, the vehicle 100 includes a suspension assembly 200. The suspension assembly 200 can be a non-independent suspension assembly, an independent suspension assembly, or an active suspension assembly.

[0255] In some embodiments, the suspension assembly 200 is an active suspension assembly. The stiffness and damping characteristics of the active suspension assembly are dynamically and adaptively adjusted according to the driving conditions of the vehicle 100 (such as the motion state of the vehicle 100 and the road surface conditions) to ensure that the suspension assembly 200 is always in an optimal damping state. Please refer to Figure 26, which is a front view of the suspension assembly 200 in the vehicle 100 shown in Figure 1. The suspension assembly 200 may include a motor (e.g., a linear motor) 10, a wishbone 113, a top cover 301, a lower support 125, and an elastic element 40. In some other examples, the suspension assembly 200 may not include the lower support 125 and the elastic element 40.

[0256] The fork arm 113 and the top cover 301 are respectively connected to the opposite ends of the linear motor 10. The linear motor 10 is used to drive the fork arm 113 and the top cover 301 to move relative to each other in a direction away from or close to each other, so as to adjust the relative displacement between the top cover 301 and the fork arm 113.

[0257] One of the fork arm 113 and the roof cover 301 is connected to the vehicle body 101, and the other of the fork arm 113 and the roof cover 301 is connected to the wheel 102. That is, if the fork arm 113 is connected to the vehicle body 101, then the roof cover 301 is connected to the wheel 102; if the fork arm 113 is connected to the wheel 102, then the roof cover 301 is connected to the vehicle body 101.

[0258] In this way, by adjusting the relative displacement between the top cover 301 and the fork arm 113 via the linear motor 10, the relative displacement between the vehicle body 101 and the wheel 102 can be adjusted. Thus, when encountering uneven roads or turns, the distance between the vehicle body 101 and the wheel 102 can be adjusted via the linear motor 10 to maintain the balance of the vehicle body 101 and improve the driving comfort of the vehicle 100.

[0259] Referring to Figure 26, the linear motor 10 includes a secondary assembly 131, with a lower support 125 fixedly mounted on the secondary assembly 131. Exemplarily, the secondary assembly 131 can be a mover assembly. The secondary assembly 131 includes a magnet mounting member 1210, with the lower support 125 fixedly mounted on the outer peripheral wall of the magnet mounting member 1210. An elastic element 40 is disposed between the lower support 125 and the top cover 301. For example, the elastic element 40 abuts against both the lower support 125 and the top cover 301, meaning the elastic element 40 is in a compressed state under the clamping of the lower support 125 and the top cover 301. For example, the elastic element 40 may or may not be connected to the magnet mounting member 1210 and the top cover 301.

[0260] When the linear motor 10 adjusts the relative displacement between the top cover 301 and the fork arm 113, the elastic element 40 will extend and retract with the relative movement of the top cover 301 and the fork arm 113, thereby adjusting the buffering performance of the elastic element 40 so that the buffering performance of the elastic element 40 meets the buffering requirements of the vehicle 100, thereby further improving the driving comfort of the vehicle 100.

[0261] Exemplarily, the elastic element 40 can be a spring, a rubber column, a latex column, etc. This disclosure uses a spring as an example to illustrate the use of the elastic element 40.

[0262] Please refer to Figure 27, which is a cross-sectional view along line AA in Figure 26. The linear motor 10 includes a secondary component 131 and a primary component 4. Exemplarily, the secondary component 131 can be a mover component, and the primary component 4 can be a stator component. Here, the primary component 4 can correspond to the first component 11 described above, and the secondary component 131 can correspond to the second component 12 described above. The secondary component 131 is sleeved on the outer periphery of the primary component 4, and the secondary component 131 can move relative to the primary component 4 along the axial direction of the linear motor 10. The fork arm 113 is connected to the secondary component 131, and the top cover 301 is connected to the primary component 4. By moving the secondary component 131 relative to the primary component 4 along the axial direction of the linear motor 10, the fork arm 133 and the top cover 301 can be driven to move relative to each other along the axial direction of the linear motor 10, thereby adjusting the relative displacement between the vehicle body 101 and the wheel 102, as well as the buffering performance of the elastic element 40.

[0263] Referring to Figure 26, the primary assembly 4 includes a central member 3 and a winding assembly 4A. A portion of the central member 3 is located within the magnet mounting member 1, and the central member 3 is capable of sliding relative to the magnet mounting member 1 along its axial direction. For example, a linear bearing can be provided at the port of the magnet mounting member 1, and the central member 3 is slidably connected to the linear bearing. For example, the central member 3 can be a rod-like structure, a plate-like structure, or other irregular structures, etc., and this disclosure does not limit this. This disclosure uses a rod-like structure as an example to illustrate the central member 3.

[0264] In some embodiments, the magnet mounting component 1210 may be columnar or cylindrical. For example, the magnet mounting component 1210 may include a housing.

[0265] The winding assembly 4A is sleeved on the center member 3. That is, the winding assembly 4A is connected to the center member 3 and is arranged circumferentially along the center member 3. For example, please refer to Figure 28, which is a partial enlarged view of circle B in Figure 27. The winding assembly 4A includes an iron core 41 and a coil 42. The iron core 41 has a mounting hole 411, the axis of which is aligned with the axis of the magnet mounting member 1210. The center member 3 passes through the mounting hole 411 and is connected to the iron core 41.

[0266] For example, the portion of the center member 3 located within the magnet mounting member 1210 passes through the mounting hole 411. The center member 3 can be interference-fitted with the iron core 41, or two limiting members can be provided on the center member 3, spaced apart along the axial direction of the magnet mounting member 1210, such as limiting protrusions or limiting bolts that can move along the axial direction of the magnet mounting member 1210. The iron core 41 is placed between the two limiting members, and the iron core 41 is clamped by the two limiting members to connect the iron core 41 to the center member 3.

[0267] In some examples, the winding assembly 4A includes multiple iron cores 41. The multiple iron cores 41 are arranged along the axial direction of the iron cores 41 (i.e., the axial direction of the magnet mounting member 1210). In this case, the multiple iron cores 41 can be brought into contact sequentially, and then the multiple iron cores are placed between two limiting members, which fix the multiple iron cores 41 to the center member 3.

[0268] A receiving groove 43 is formed between two adjacent iron cores 41, and a coil 42 is received within the receiving groove 43. The receiving groove 43 extends circumferentially along the mounting hole 411. There can be one or more coils 42. This disclosure is exemplified by having multiple coils 42. A receiving groove 43 is formed between any two adjacent iron cores 41, meaning there are multiple receiving grooves 43, and one coil 42 is received within one receiving groove 43. Furthermore, the coil 42 extends circumferentially along the mounting hole 411.

[0269] In some other examples, the primary component 4 may also include a core 41 that extends axially along the magnet mounting 1 and has a plurality of receiving slots 43 spaced apart axially along the magnet mounting 1210, in which the coil 42 is received.

[0270] Referring to Figure 28, the secondary component 131 also includes a magnet 132. The magnet 132 is fixedly disposed within the magnet mounting member 1 and surrounds the primary component 4; that is, the magnet 132 is located between the magnet mounting member 1210 and the primary component 4. For example, the magnet 132 can be a ring-shaped structure, with the iron core 41 and the coil 42 both passing through it. Exemplarily, the magnet 132 can be a permanent magnet, an electromagnet, an energized coil, etc.

[0271] In some examples, there are multiple magnets 132. Multiple magnets 132 are stacked sequentially along the axial direction of the magnets 132.

[0272] In some embodiments of this disclosure, the above-described configuration generates a magnetic field between the coil 42 and the magnet 132 after the coil 42 is energized. The direction of the Lorentz force of this magnetic field is along the axial direction of the magnet 132, thereby generating an interaction force along the axial direction of the magnet 132 between the center member 3 and the magnet mounting member 1210, which in turn pushes the center member 3 and the magnet mounting member 1210 to move relative to each other along the axial direction of the magnet 132. Furthermore, the direction of the interaction force between the center member 3 and the magnet mounting member 1210 can be controlled by changing the direction of the current flow in the coil 42.

[0273] Based on this, please continue to refer to Figure 27, where the top cover 301 is connected to the center component 3. For example, the top cover 301 is connected to the portion of the center component 3 located on the outside of the magnet mounting component 1. The top cover 301 and the center component 3 can be connected by welding, snap-fitting, screwing, or other means, and this disclosure does not limit the connection in this regard.

[0274] The fork arm 113 is connected to the magnet mounting component 1210. For example, the fork arm 133 is connected to the end of the magnet mounting component 1210 facing away from the top cover 301. The fork arm 113 and the magnet mounting component 1210 can be connected by welding, snap-fitting, screwing, or other means, and this disclosure does not limit the connection.

[0275] By sliding the magnet mounting part 1210 relative to the center part 3, the top cover 301 and the fork arm 133 can be moved relative to each other, thereby adjusting the relative displacement between the top cover 301 and the fork arm 133, and thus adjusting the distance between the body 101 and the wheel 102. In addition, when the magnet mounting part 1210 and the center part 3 slide relative to each other, the magnet mounting part 1210 and the top cover 301 will also move relative to each other, thereby causing the elastic element 40 to extend and retract, so as to adjust the cushioning performance of the elastic element 40.

[0276] This disclosure uses magnet 132 as an example of a radially magnetized toroidal magnet.

[0277] Currently, most of the ring-shaped magnets on the market are not large in size or have low requirements for magnetic performance. Under these conditions, integral molding can meet the corresponding usage requirements.

[0278] As motor performance improves, the performance requirements for magnet 132 also increase. For ring-shaped magnet 132 with a large diameter, for example, the diameter of the ring-shaped magnet 132 is greater than 80mm. It is difficult to form the magnet 132 in one piece, resulting in a low yield. Furthermore, the magnetic properties of the magnet 132, such as coercivity, are difficult to meet the high performance requirements. Therefore, segmented splicing of the ring-shaped magnet 132 has become a necessary technical approach.

[0279] Please refer to Figure 29, which is a structural diagram of a magnet according to some embodiments. The magnet 132 may include multiple magnetic sheets arranged circumferentially, all of which are arc-shaped. The arc-shaped magnetic sheets facilitate the circumferential splicing of multiple magnetic sheets to form a ring-shaped magnet 132. This allows the magnet 132 to be connected between the magnet mounting member 1210 and the primary component 4, thereby generating a magnetic field between the magnet 132 and the coil, which in turn provides driving force to the motor, causing the central member 3 to move relative to the magnet mounting member 1210.

[0280] Please refer to Figure 30, which is a partial structural diagram of a secondary component according to some embodiments. In some embodiments, any two adjacent magnetic sheets are connected by a connector.

[0281] The connector allows multiple magnetic sheets to be connected sequentially to form a ring-shaped magnet 132. The connection between adjacent magnetic sheets is guaranteed by the connector, so that the magnetic sheets are not easy to fall off when subjected to external force.

[0282] In some embodiments, the connector may be a first adhesive. Exemplarily, the first adhesive may be an epoxy resin adhesive, a polyurethane adhesive, an acrylic structural adhesive, or a silicone adhesive.

[0283] The first adhesive component allows for the connection of magnetic sheets of various shapes and sizes, making the connection more flexible. Furthermore, the first adhesive component tightly connects adjacent magnetic sheets, reducing gaps and loosening in the mechanical connection, thereby ensuring the connection strength of the magnetic sheets.

[0284] In some embodiments, the connector may also be a snap-fit ​​connector, allowing adjacent magnetic sheets to snap together to form an annular magnet 132. The connector may also be a bolt or other connection structure, which are not further limited herein.

[0285] The magnet 132 is formed by connecting multiple magnetic sheets circumferentially. In actual use, due to factors such as impact and vibration generated by the vehicle 100, the connection between the multiple magnetic sheets may fail, causing the magnetic sheets to fall off, resulting in the magnet 132 scraping against the primary component 4, increasing the running resistance of the motor, and even damaging the motor.

[0286] Please refer to Figures 29, 30, and 31. Figure 31 is a partial structural diagram of the secondary component shown in Figure 30 when the magnet connection fails. The multiple magnetic sheets of the magnet 132 may include a first magnetic sheet 211, a second magnetic sheet 212, and a third magnetic sheet 213. The second magnetic sheet 212 is disposed between the first magnetic sheet 211 and the third magnetic sheet 213. The connectors include a first connector 2140 and a second connector 2150. The first magnetic sheet 211 and the second magnetic sheet 212 are connected by the first connector 2140, and the second magnetic sheet 212 and the third magnetic sheet 213 are connected by the second connector 2150.

[0287] In some embodiments, the second magnetic sheet 212 has a preset outer wall surface 217. In the orthographic projection of the magnet 132 onto the preset plane, the distance from the end of the inner wall surface of the first magnetic sheet 211 near the second magnetic sheet 212 to the end of the inner wall surface of the third magnetic sheet 213 near the second magnetic sheet 212 is a first distance W1, and the distance between the two endpoints of the preset outer wall surface 217 is a second distance W2. The first distance W1 is less than the second distance W2, and the preset plane is perpendicular to the axis of the magnet.

[0288] When the first distance W1 between the inner wall surface of the first magnetic sheet 211 near the end of the second magnetic sheet 212 and the inner wall surface of the third magnetic sheet 213 near the end of the second magnetic sheet 212 is less than the second distance W2 between the two endpoints of the preset outer wall surface 217, the preset outer wall surface 217 will not detach from between the first magnetic sheet 211 and the third magnetic sheet 213, thereby preventing the second magnetic sheet 212 from falling off and causing abnormal motor operation.

[0289] In other embodiments, in the orthographic projection of the magnet 132 onto a preset plane, the inner wall surfaces of the second magnet 212, the first connector 2140, and the second connector 2150 form a first arc segment, and the preset outer wall surface 217 forms a second arc segment; the length of the second arc segment is greater than the length of the first arc segment.

[0290] When the length of the second arc segment is greater than the length of the first arc segment, the preset outer wall surface 217 will not detach from between the first magnetic piece 211 and the third magnetic piece 213, thereby preventing the second magnetic piece 212 from falling off and causing abnormal motor operation.

[0291] In some embodiments, the first arc segment and the second arc segment are concentrically arranged. Since the first arc segment is located on the projection of the inner wall surface of the magnet 132 and the second arc segment is located on the projection of the outer wall surface of the magnet 132, the concentric arrangement of the first arc segment and the second arc segment can make the centers of the inner wall surface and the outer wall surface of the magnet 132 coincide, thereby making the inner and outer peripheral surfaces of the magnet 132 smoother and less prone to skewing and falling off.

[0292] In some embodiments, the magnet 132 has a circular ring structure, the orthographic projection of the inner circumferential surface of the magnet 132 onto a preset plane is an inner circle, and the orthographic projection of the outer circumferential surface of the magnet 132 onto the preset plane is an outer circle, with the inner circle and outer circle being concentrically arranged.

[0293] This allows the magnet 132 to be evenly distributed in the circumferential direction, reducing motor malfunctions caused by imbalance of the magnet 132 when the motor rotates.

[0294] Referring to Figures 30 and 31, in some embodiments, a first gap 214 exists between the first magnetic sheet 211 and the second magnetic sheet 212, and a second gap 215 exists between the second magnetic sheet 212 and the third magnetic sheet 213. A first connector 2140 is disposed in the first gap 214 for connecting the first magnetic sheet 211 and the second magnetic sheet 212, and a second connector 2150 is disposed in the second gap 215 for connecting the second magnetic sheet 212 and the third magnetic sheet 213.

[0295] To prevent the second magnetic piece 212 from falling out between the first magnetic piece 211 and the third magnetic piece 213, the dimensions of the first gap 214 and the second gap 215 must be smaller than the dimensions of the second magnetic piece 212.

[0296] For example, the section of the inner circle located within the first gap 214 is the first sub-arc segment, and the section of the inner circle located within the second gap 215 is the second sub-arc segment. Along the radial direction of the magnet 132, the second magnetic sheet 212 has a preset inner wall surface 216, and the orthographic projection of the preset inner wall surface 216 on the preset plane is the third sub-arc segment. The first sub-arc segment, the second sub-arc segment, and the third sub-arc segment form the first arc segment.

[0297] Since the length of the first arc segment is less than the length of the second arc segment, the size of the preset outer wall surface 217 of the second magnetic sheet 212 is less than the sum of the sizes of the first gap 214, the second gap 215 and the preset inner wall surface 216. This can prevent the second magnetic sheet 212 from falling off toward the central axis of the magnet 132, thereby avoiding the second magnetic sheet 212 from falling off and colliding with the primary component 4, causing the motor to malfunction.

[0298] In some embodiments, the thickness of the first connector 2140 is equal to the thickness of the second connector 2150 along the circumferential direction of the magnet.

[0299] Since the thickness of the first connector 2140 is equal to the thickness of the second connector 2150, the first magnetic sheet 211, the second magnetic sheet 212 and the third magnetic sheet 213 can be evenly distributed, and the connection strength between the first magnetic sheet 211 and the second magnetic sheet 212 is equal to the connection strength between the second magnetic sheet 212 and the third magnetic sheet 213, reducing the risk of one end of the second magnetic sheet 212 falling off due to vibration and impact during motor operation.

[0300] In some embodiments, the first magnetic sheet 211 and the third magnetic sheet 213 are an integral structure. When the first magnetic sheet 211 and the third magnetic sheet 213 are an integral structure, the number of parts and installation steps can be reduced, and the second magnetic sheet 212 can be directly installed between the first magnetic sheet 211 and the third magnetic sheet 213, making installation simpler.

[0301] In other embodiments, the first magnetic sheet 211 and the third magnetic sheet 213 are separate structures. This provides greater flexibility in installing the first magnetic sheet 211, the second magnetic sheet 212, and the third magnetic sheet 213, and makes them less susceptible to interference from other structures.

[0302] Referring to Figures 30 and 31, the second magnetic sheet 212 has a first position (preset position) Z1 and a second position Z2. When the second magnetic sheet 212 is located at the first position Z1, the preset inner wall surface 216 is located on the same arc surface as the inner wall surface of the first magnetic sheet 211 and the inner wall surface of the third magnetic sheet 213. When the second magnetic sheet 212 is located at the second position Z2, along the radial direction of the magnet 132, the preset outer wall surface 217 is located inside the outer wall surface of the first magnetic sheet 211 and inside the outer wall surface of the third magnetic sheet 213. Due to assembly errors of the magnet or displacement of the magnetic sheet during operation, the second magnetic sheet 212 may be located between the first position Z1 and the second position Z2.

[0303] Here, the preset inner wall surface 216, the inner wall surface of the first magnetic sheet 211, and the inner wall surface of the third magnetic sheet 213 are located on the same arc surface and can be completely coplanar. Alternatively, the preset inner wall surface 216, the inner wall surface of the first magnetic sheet 211, and the inner wall surface of the third magnetic sheet 213 are located on the same arc surface radially along the arc surface, and there is a small tolerance between the preset inner wall surface 216, the inner wall surface of the first magnetic sheet 211, and the inner wall surface of the third magnetic sheet 213. For example, the distance between the preset inner wall surface 216, the inner wall surface of the first magnetic sheet 211, and the inner wall surface of the third magnetic sheet 213 radially along the arc surface can be less than or equal to 30 μm. For example, the distance can be 10 μm, 16 μm, or 30 μm.

[0304] In some embodiments, from a processing perspective, the inner diameter of the magnet 132 can be greater than or equal to 80 mm. When the inner diameter of the magnet 132 is small, the magnet 132 can be integrally formed, which helps to improve processing efficiency. When the inner diameter of the magnet 132 is greater than or equal to 80 mm, it is difficult to use the integral forming process and the yield is low. Therefore, spliced ​​magnets 132 can be used to achieve higher performance.

[0305] In other embodiments, from a performance perspective, the inner diameter of the magnet 132 can also be less than 80mm. Compared with the integrally formed ring magnet 132, the spliced ​​magnet 132 can meet higher magnetic performance requirements.

[0306] In some embodiments, the central angles of the multiple magnetic sheets are all equal. Since the multiple magnetic sheets are arranged circumferentially along the magnet 132 to form a ring-shaped magnet 132, and the radii of the inner and outer walls of the multiple magnetic sheets are all equal, the central angles of the multiple magnetic sheets are also equal, ensuring that the shapes and sizes of the multiple magnetic sheets are uniform. This results in more uniform magnetic properties of the spliced ​​magnet 132, thereby making the motor operation more stable.

[0307] In addition, since the central angles of multiple magnetic sheets are equal, multiple magnetic sheets of the same size can be produced using a single mold during the processing of the magnetic sheets, and then spliced ​​together to form a ring-shaped magnet 132. This reduces the processing difficulty and saves processing costs.

[0308] Since the central angles of the multiple magnetic pieces are all equal, the size of the central angle depends on the number of magnetic pieces, i.e., θ3 = 360° / N, where N is the number of magnetic pieces in a single annular magnet 132. Please continue to refer to Figures 30 and 31. Due to factors such as impact and vibration, the second magnetic piece 212 will shift relative to the first magnetic piece 211 and the third magnetic piece 213.

[0309] In some embodiments, along the radial direction of the magnet 132, the second magnetic piece 212 can be offset relative to the first magnetic piece 211 to the side of the preset outer wall surface 217 facing away from the preset inner wall surface 216. At this time, the second magnetic piece 212 is offset toward the magnet mounting member 1210. Since the magnet mounting member 1210 and the magnet 132 are relatively stationary, no scratching will occur between them.

[0310] In other embodiments, along the radial direction of the magnet 132, the second magnet 212 can be offset relative to the first magnet 211 to the side of the preset inner wall surface 216 opposite to the preset outer wall surface 217.

[0311] In some embodiments, when at least one of the first connector 2140 and the second connector 2150 detaches, a portion of the second magnet 212 extends beyond the inner wall surface of at least one of the first magnet 211 and the third magnet 213.

[0312] At this time, the second magnetic piece 212 is located between the first position Z1 and the second position Z2 or the second magnetic piece 212 is located at the second position Z2.

[0313] Please continue to refer to Figures 28, 30 and 32. Figure 32 is a partial enlarged view of the displacement of the second magnetic sheet shown in Figure 31. In some embodiments, there is an air gap between the primary component 4 and the secondary component 131. The air gap is the gap between the inner peripheral surface of the magnet 132 and the outer peripheral surface of the primary component 4.

[0314] This air gap allows the magnet 132 to maintain a gap with the primary component 4, reducing the friction generated by the mutual movement between the primary component 4 and the secondary component 131.

[0315] In some embodiments, the size of the air gap along the radial direction of the magnet 132 is a first spacing L3, that is, the magnet 132 can be arranged around the primary component 4 of the motor and has a first spacing L3 between it and the primary component 4. The first spacing L3 can be the average value of the spacing between the inner wall surfaces of the plurality of magnets and the primary component 4.

[0316] The dimension E1 of the first connector 2140 or the second connector 2150 in the circumferential direction of the magnet 132 satisfies the first spacing L3: N is the number of magnetic sheets.

[0317] By limiting the dimension E1 of the first connector 2140 or the second connector 2150 in the circumferential direction of the magnet 132, when the second magnet 212 is in the second position Z2, the end of the second magnet 212 facing the first magnet 211 can contact the first magnet 211 to limit the second magnet 212, thereby limiting the displacement distance of the second magnet 212 and thus preventing the second magnet 212 from falling out of the first gap 214, so as to avoid motor failure caused by the magnet falling out.

[0318] When the second magnetic piece 212 is in the first position Z1, the angle between the line connecting the endpoint of the preset outer wall surface 217 near the first magnetic piece 211 and the endpoint of the preset outer wall surface 217 near the first magnetic piece 211 when the second magnetic piece 212 is in the second position Z2, and the wall surface of the first magnetic piece 211 near the second magnetic piece 212, is equal to half the central angle of the second magnetic piece 212. Therefore, When the second magnetic piece 212 is located in the second position Z2, the distance between the endpoint of the outer wall surface 217 near the first magnetic piece 211 and the endpoint of the outer wall surface of the first magnetic piece 211 near the second magnetic piece 212 is preset.

[0319] when When the second magnetic sheet 212 is in use, there will be no gap between it and the primary component 4. Therefore, the second magnetic sheet 212 will not scrape against the primary component 4, thereby avoiding abnormal noise and abnormal operation caused by scraping, and improving the reliability and safety of motor use.

[0320] Furthermore, since any two adjacent magnetic pieces are connected by the first connector 2140, and both the first connector 2140 and the second connector 2150 can be the first adhesive (as shown in Figure 30, adhesive 2100), and the first connector 2140 is disposed in the first gap 214, limiting the dimension E1 of the first connector 2140 in the circumferential direction of the magnet can also limit the dimension of the first adhesive between the first magnetic piece 211 and the second magnetic piece 212, reducing the possibility of the magnet 132 failing or falling off due to the excessive thickness of the first adhesive.

[0321] In some embodiments, when the second magnetic sheet 212 extends beyond the inner wall surface of at least one of the first magnetic sheet 211 and the third magnetic sheet 213, the maximum distance between the outer wall surface 217 and the outer wall surface of at least one of the first magnetic sheet 211 and the third magnetic sheet 213 in the radial direction of the magnet 132 is a second distance H.

[0322] At this time, when the second magnetic sheet 212 is located at the second position Z2, along the radial direction of the magnet 132, the preset outer wall surface 217 is located inside the outer wall surface of the first magnetic sheet 211 and inside the outer wall surface of the third magnetic sheet 213. The distance between the preset outer wall surface 217 and the outer wall surface of the first magnetic sheet 211 in the radial direction of the magnet 132 is the second distance M, and the second distance M can satisfy: M < L3.

[0323] In this way, there is at least a gap (L3-M) between the preset inner wall surface 216 and the primary component 4, and the second magnetic sheet 212 will not contact the primary component 4, thus preventing scratching. This avoids abnormal noise and malfunctions caused by scratching, improving the reliability and safety of the motor. In some embodiments, the number N of magnetic sheets in the annular magnet 132 can be less than or equal to 36. If N > 36, it will increase the difficulty of splicing the magnetic sheets, reduce work efficiency, and result in poor quality of the finished product.

[0324] In some embodiments, the number N of magnetic sheets in the annular magnet 132 can be greater than or equal to 4. If N < 4, the size of a single magnetic sheet is large, the overall molding is difficult, the yield is low, and the magnetic properties are not easy to meet the requirements.

[0325] Therefore, having a number of magnetic sheets N greater than or equal to 4 and less than or equal to 36 can reduce the processing difficulty of magnet 132 and improve the quality of the finished product.

[0326] For example, the number of magnetic sheets can be 4, 10, 18, 24, 32 or 36, and this disclosure does not limit the number.

[0327] Since the central angles of the multiple magnetic sheets are all equal, their shapes and sizes are also equal. Therefore, the inner diameter of the magnet 132 can be twice the radius of the preset inner wall surface 216 of the second magnetic sheet 212. Because there may be small tolerances between the multiple magnetic sheets along the axial direction of the magnet 132, the inner diameter of the magnet 132 can be the average of twice the radii of the inner wall surfaces of the multiple magnetic sheets.

[0328] Please continue to refer to Figures 30 and 31. In some embodiments, when the preset inner wall surface 216 is located on the same arc surface as the inner wall surface of the first magnetic sheet 211 and the inner wall surface of the third magnetic sheet 213, a gap is formed between the second magnetic sheet 212 and the magnet mounting member 1210. The second magnetic sheet 212 and the magnet mounting member 1210 can be connected by a third connector.

[0329] Here, the third connector can be a second adhesive to fix the magnet 132 to the magnet mounting part 1210.

[0330] In some embodiments, the first adhesive member may be integrally formed with the second adhesive member.

[0331] In some embodiments, the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting member 1210 is less than or equal to the first distance L3. By limiting the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting member 1210, the support stability of the magnet mounting member 1210 for the second magnetic sheet 212 can be improved, and the degree of displacement of the second magnetic sheet 212 relative to the first magnetic sheet 211 can be reduced. In addition, limiting the minimum distance E2 can also limit the size of the second adhesive member to ensure the connection strength of the second adhesive member, thereby reducing the possibility of magnet 132 failure or detachment.

[0332] In some embodiments, the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting member 1210 can satisfy: 0.25L3≤E2. This ensures the minimum dimensions of the adhesive between the second magnetic sheet 212 and the magnet mounting member 1210, guaranteeing a secure connection between the second magnetic sheet 212 and the magnet mounting member 1210, thus reducing the risk of magnetic sheet failure or detachment.

[0333] In some embodiments, the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting member 1210 can satisfy: 0.25L3≤E2≤1.25L3. By limiting the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting member 1210, E2≤1.25L3 can be achieved, which can limit the offset of the second magnetic sheet 212, thereby preventing the second magnetic sheet 212 from scratching the primary component 4.

[0334] In one embodiment, when the magnet 132 is of the first size, the number N of magnetic sheets in a single magnet 132 is 36, the dimension E1 of the first connector 2140 in the circumferential direction of the magnet is 0.18mm, the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting part 1210 is 0.2mm, and the first distance L3 is 0.25mm.

[0335] Substituting these dimensional parameters into the formula mentioned above, we can satisfy... Either M < L3 or 0.25L3 ≤ E2 ≤ 1.25L3 can prevent magnet 132 from rubbing against primary component 4 when it is deflected.

[0336] Furthermore, when the magnet 132 meets the aforementioned dimensions, its surface magnetic flux fluctuation is relatively small, and its impact on motor performance and operating thrust fluctuation is within an acceptable range. Compared to integrally formed magnets, spliced ​​magnets 132 can effectively improve the temperature resistance of the finished magnet 132, enabling it to reach N48UH or even higher levels to meet the requirements of high thrust output in motors. It should be noted that surface magnetic flux refers to the magnetic induction intensity at a specific point on the surface of the magnet 132, also known as surface magnetic flux density.

[0337] For example, please refer to Figure 33, which is a simulation diagram of the magnetic flux density distribution of the magnet in the first dimension according to some embodiments. When the color temperature of the magnet increases and approaches color A, the magnetic field density distribution is relatively dense and the magnetic field strength is high. When the color temperature of the magnet decreases and approaches color B, the magnetic field density distribution is relatively sparse and the magnetic field strength is low.

[0338] In Figure 33, the color temperature is highest at the junction a1 between two adjacent magnetic sheets of the magnet. According to the correspondence between color temperature change and magnetic field density, the magnetic field density at junction a1 is 0.1342T, which is the maximum magnetic field density on the magnet. The color temperature is lowest at the middle part b1 of the magnet. According to the correspondence between color temperature change and magnetic field density, the magnetic field density at this point is 0.0128T, which is the minimum magnetic field density on the magnet.

[0339] The fluctuations between the maximum and minimum values ​​are within a suitable range, having a relatively small impact on motor performance and operating thrust fluctuations, and can meet the performance requirements of the magnets and the motor.

[0340] Please refer to Figure 34, which is a simulation diagram of the magnetic flux density distribution of the magnet 132 and the air gap in the first dimension according to some embodiments. This figure shows the magnetic flux density distribution under the interaction of the magnet's magnetic field and the air gap's magnetic field. When the magnetic flux density is 0, the magnet's magnetic field and the air gap's magnetic field completely cancel each other out, resulting in more stable motor performance. Similarly, when the color temperature of the magnetic flux density distribution diagram increases and approaches color A, the magnetic field density distribution is relatively dense and the magnetic field strength is high. When the color temperature of the distribution diagram decreases and approaches color B, the magnetic field density distribution is relatively sparse and the magnetic field strength is low.

[0341] In Figure 34, the color temperature is highest at the joint of two adjacent magnetic sheets of magnet 132. According to the correspondence between color temperature change and magnetic field density, the magnetic field density at the joint is 1.2947T, which is the maximum value of the magnetic field density. The minimum value of the magnetic field density is 0T.

[0342] The magnetic flux density fluctuations caused by the interaction between the magnetic field of the magnet and the air gap magnetic field are within a suitable range, and have little impact on the performance of the motor and the fluctuations in the operating thrust, thus meeting the performance requirements of the magnet and the motor.

[0343] Therefore, when the magnet 132 is of the first size, the magnetic field density fluctuation of the magnet 132 is within a suitable range, and its impact on the motor performance and operating thrust fluctuation is small, which can meet the performance requirements of the magnet 132 and the motor.

[0344] In other embodiments, when the magnet 132 is of the second size, the number N of magnetic sheets in a single magnet 132 is 8, the dimension E1 of the first connector 2140 in the circumferential direction of the magnet is 0.4 mm, the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting part 1210 is 0.5 mm, and the first distance L3 is 0.5 mm.

[0345] Substituting these dimensional parameters into the formula mentioned above, we can satisfy... Either M < L3 or 0.25L3 ≤ E2 ≤ 1.25L3 can prevent magnet 132 from rubbing against primary component 4 when it is deflected.

[0346] When the magnet 132 meets the above dimensions, the surface magnetic fluctuation of the magnet 132 is small, and the impact on motor performance and operating thrust fluctuation is within an acceptable range.

[0347] Please refer to Figure 35, which is a simulation diagram of the magnetic flux density distribution of the magnet in the second dimension according to some embodiments. In Figure 35, the color temperature is highest at the joint a2 of two adjacent magnetic sheets in magnet 132. According to the correspondence between color temperature change and magnetic field density, the magnetic field density at joint a2 is 0.2253T, which is the maximum value of the magnetic field density on the magnet. The color temperature is lowest at the middle b2 of the magnetic sheet in the magnet. According to the correspondence between color temperature change and magnetic field density, the magnetic field density here is 0.0096T, which is the minimum value of the magnetic field density on the magnet.

[0348] The fluctuations between the maximum and minimum values ​​are within a suitable range, having a relatively small impact on motor performance and operating thrust fluctuations, and can meet the performance requirements of the magnets and the motor.

[0349] Please refer to Figure 36, which is a simulation diagram of the magnetic flux density distribution of the magnet and air gap in the second dimension according to some embodiments. In Figure 36, the color temperature is highest at the splicing point a2 between two adjacent magnetic sheets of magnet 132. According to the correspondence between color temperature change and magnetic field density, the magnetic field density at splicing point a2 is 1.2919T, which is the maximum value of the magnetic field density. The minimum value of the magnetic field density is 0T, and the magnetic field of the magnet and the magnetic field of the air gap completely cancel each other out, resulting in more stable motor performance.

[0350] The magnetic flux density fluctuations caused by the interaction between the magnetic field of the magnet and the air gap magnetic field are within a suitable range, and have little impact on the performance of the motor and the fluctuations in the operating thrust, thus meeting the performance requirements of the magnet and the motor.

[0351] Therefore, when the magnet 132 is the second size, the magnetic field density fluctuation of the magnet 132 is within a suitable range, and the impact on the motor performance and operating thrust fluctuation is small, which can meet the performance requirements of the magnet 132 and the motor.

[0352] In one embodiment, when the magnet 132 is of the third size, the number N of magnetic sheets in a single magnet 132 is 12, the dimension E1 of the first connector 2140 in the circumferential direction of the magnet is 1.0 mm, the minimum distance E2 between the second magnetic sheet 212 and the magnet mounting part 1210 is 0.8 mm, and the first distance L3 is 1.2 mm.

[0353] Substituting these dimensional parameters into the formula mentioned above, we can satisfy... Either M < L3 or 0.25L3 ≤ E2 ≤ 1.25L3 can prevent magnet 132 from rubbing against primary component 4 when it is deflected.

[0354] Please refer to Figure 37, which is a simulation diagram of the magnetic flux density distribution of the magnet 132 in the second dimension according to some embodiments. In Figure 37, the color temperature is highest at the splice point a3 between two adjacent magnetic sheets of the magnet 132. According to the correspondence between color temperature change and magnetic field density, the magnetic field density at the splice point a3 is 0.3734T, which is the maximum value of the magnetic field density on the magnet. The color temperature is lowest at the middle part b3 of the magnetic sheet in the magnet. According to the correspondence between color temperature change and magnetic field density, the magnetic field density here is 0.0178T, which is the minimum value of the magnetic field density on the magnet.

[0355] The fluctuations between the maximum and minimum values ​​are within a suitable range, having a relatively small impact on motor performance and operating thrust fluctuations, and can meet the performance requirements of the magnets and the motor.

[0356] Please refer to Figure 38, which is a simulation diagram of the magnetic flux density distribution of the magnet and air gap in the second dimension according to some embodiments. In Figure 38, the color temperature is highest at the splicing point a3 between two adjacent magnetic sheets of magnet 132. According to the correspondence between color temperature change and magnetic field density, the magnetic field density at splicing point a3 is 1.2801T, which is the maximum value of the magnetic field density. The minimum value of the magnetic field density is 0T, and the magnetic field of the magnet and the magnetic field of the air gap completely cancel each other out, resulting in more stable motor performance.

[0357] The magnetic flux density fluctuations caused by the interaction between the magnetic field of the magnet and the air gap magnetic field are within a suitable range, and have little impact on the performance of the motor and the fluctuations in the operating thrust, thus meeting the performance requirements of the magnet and the motor.

[0358] Therefore, when the magnet 132 is of the third size, the magnetic field density fluctuation of the magnet 132 is within a suitable range, and its impact on the motor performance and operating thrust fluctuation is small, which can meet the performance requirements of the magnet 132 and the motor.

[0359] In summary, by adjusting the dimensional parameters M, E1, and E2 of magnet 132, the dimensions of magnet 132 can be made to meet the requirements. When M < L3 and 0.25L3 ≤ E2 ≤ 1.25L3, the second magnet 212 will not rub against the primary component 4 when it is displaced relative to the first magnet 211, thereby improving the safety and reliability of the motor. Under these dimensional parameters, there will be a small decrease in magnetic flux density at the connection between adjacent magnets in the magnet 132, but this will not affect the operation of the motor and will meet the performance requirements of the magnet 132 and the motor.

[0360] Please refer to Figure 39, which shows the air gap magnetic flux density distribution curves of the magnet at 0.1 mm on the outer diameter side under the first, second, and third dimensions according to some embodiments. The curves show that there is a peak value in the magnetic flux density at the splicing gap of the magnet 132. By adjusting the dimensional parameters M, E1, and E2 of the magnet 132, the peak width and corresponding peak value can be adjusted. The smaller the peak width and the lower the peak value, the better the consistency of the magnet 132 and the smaller the impact on the motor's operating performance.

[0361] In the description of this specification, features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0362] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An electric motor (10), comprising: First component (11); and Second component (12); in, One of the first component (11) and the second component (12) can move relative to the other in a preset direction; one of the first component (11) and the second component (12) is a stator component, and the other of the first component (11) and the second component (12) is a rotor component.

2. The motor (10) according to claim 1, wherein, The first component (11) is reciprocating relative to the second component (12) in a preset direction. One of the first component (11) and the second component (12) includes a winding assembly (1), and the other of the first component and the second component includes a magnet assembly (2). The magnet assembly (2) includes: A plurality of magnets (20), said plurality of magnets (20) comprising: First magnet (201) The second magnet (202) is attracted to the first magnet, and in a predetermined direction, a portion of the second magnet (202) is in direct contact with a portion of the first magnet (201); At least one of the first magnet (201) and the second magnet (202) is provided with an adhesive reservoir (25), and an adhesive (26) is provided in the adhesive reservoir (25). A portion of the first magnet (201) and a portion of the second magnet (202) are fixedly connected by the adhesive (26) in the adhesive reservoir (25).

3. The motor (10) according to claim 2, wherein, The ratio of the dimension L2 of the adhesive reservoir (25) perpendicular to the preset direction to the dimension L1 of the magnet (20) perpendicular to the preset direction satisfies: 0.35 <L2 / L1<0.6; The ratio of the dimension B2 of the adhesive reservoir (25) in the preset direction to the single-side dimension B1 of the magnet (20) in the preset direction satisfies: 0 <B2 / B1<0.15。 4. The motor (10) according to claim 3, wherein, The ratio of the dimension L2 of the adhesive reservoir (25) perpendicular to the preset direction to the dimension L1 of the magnet (20) perpendicular to the preset direction satisfies: 0.4 <L2 / L1<0.55; The ratio of the dimension B2 of the adhesive reservoir (25) in the preset direction to the single-side dimension B1 of the magnet (20) in the preset direction satisfies: 0 <B2 / B1<0.1。 5. The motor (10) according to claim 2, wherein, The ratio of the dimension L2 of the adhesive reservoir (25) perpendicular to the preset direction to the dimension L1 of the magnet (20) perpendicular to the preset direction satisfies: 0 <L2 / L1<0.6; The ratio of the dimension B2 of the adhesive reservoir (25) in the preset direction to the single-side dimension B1 of the magnet (20) in the preset direction satisfies: 0.05 <B2 / B1<0.2。 6. The motor (10) according to claim 5, wherein, The ratio of the dimension L2 of the adhesive reservoir (25) perpendicular to the preset direction to the dimension L1 of the magnet (20) perpendicular to the preset direction satisfies: 0 <L2 / L1<0.55; The ratio of the dimension B2 of the adhesive reservoir (25) in the preset direction to the single-side dimension B1 of the magnet (20) in the preset direction satisfies: 0.1 <B2 / B1<0.15。 7. The motor (10) according to any one of claims 2 to 6, wherein, The cross-section of the adhesive reservoir (25) along the preset direction is rectangular, triangular, or trapezoidal.

8. The motor (10) according to any one of claims 2-7, wherein, The adhesive reservoir (25) is annular and is arranged around the periphery of the magnet (20).

9. The motor (10) according to claim 8, wherein, The adhesive reservoir (25) includes a plurality of adhesive reservoir segments (255) arranged circumferentially along the magnet (20).

10. The motor (10) according to any one of claims 2-9, wherein, The multiple magnets are arranged in a Heilbeck configuration.

11. The motor (10) according to claim 10, wherein, The first magnet (201) includes a first sub-magnet (21) and a second sub-magnet (22) alternately arranged along the preset direction. The magnetization direction of the first sub-magnet (21) and the magnetization direction of the second sub-magnet (22) are both parallel to the preset direction, and the magnetization direction of the first sub-magnet (21) is opposite to the magnetization direction of the second sub-magnet (22). At least one of the first sub-magnet (21) or the second sub-magnet (22) is provided with the adhesive groove (25).

12. The motor (10) according to claim 11, wherein the first sub-magnet (21) is provided with a first adhesive groove (251) and a second adhesive groove (252), the first adhesive groove (251) and the second adhesive groove (252) are spaced apart along the preset direction, and both the first adhesive groove (251) and the second adhesive groove (252) are recessed from the surface of the first sub-magnet (21) facing away from the winding assembly (1) toward the surface of the first sub-magnet (21) facing the winding assembly (1); The first adhesive groove (251) extends away from the second adhesive groove (252) and penetrates one end face of the first sub-magnet (21); the second adhesive groove (252) extends away from the first adhesive groove (251) and penetrates the other end face of the first sub-magnet (21).

13. The motor (10) according to claim 11 or 12, wherein, The second sub-magnet (22) is provided with a third adhesive groove (253) and a fourth adhesive groove (254). The third adhesive groove (253) and the fourth adhesive groove (254) are spaced apart along the preset direction. The third adhesive groove (253) and the fourth adhesive groove (254) are both recessed from the surface of the second sub-magnet (22) facing away from the winding assembly (1) toward the surface of the second sub-magnet (22) facing the winding assembly (1). The third adhesive reservoir (253) extends away from the fourth adhesive reservoir (254) and penetrates one end face of the second sub-magnet (22); the fourth adhesive reservoir (254) extends away from the third adhesive reservoir (253) and penetrates the other end face of the second sub-magnet (22).

14. The motor (10) according to any one of claims 11-13, wherein, The second magnet (202) includes a third sub-magnet (23) and a fourth sub-magnet (24) arranged alternately along the preset direction, and the third sub-magnet (23), the first sub-magnet (21), the fourth sub-magnet (24) and the second sub-magnet (22) are in contact in sequence.

15. The motor (10) according to claim 14, wherein, The first sub-magnet (21), the third sub-magnet (23), the second sub-magnet (22) and the fourth sub-magnet (24) constitute a pair of magnetic poles, and the magnet assembly (2) includes multiple pairs of magnetic poles stacked along the preset direction.

16. The motor (10) according to any one of claims 2-15, wherein, The portions of adjacent magnets (20) of the plurality of magnets (20) are in direct contact, and the portions of the adjacent magnets (20) are connected by adhesive (26) in the adhesive groove (25); the adjacent magnets (20) are attracted to each other by magnetic force.

17. The seed motor (10) according to any one of claims 2 to 16, wherein, The adhesive groove (25) is recessed from the surface of the magnet (20) facing away from the winding assembly (1) toward the surface of the magnet (20) facing the winding assembly (1).

18. The motor (10) according to claim 17, wherein, The other of the first component and the second component further includes a housing (30), the magnet assembly (2) is disposed within the housing (30), and an adhesive (26) is provided between the housing (30) and at least the adhesive groove (25) of the magnet assembly (2).

19. The motor (10) according to claim 18, wherein, The first component and the second component further include a mandrel, the winding assembly (1) is disposed on the outer periphery of the mandrel, and a portion of the mandrel and the winding assembly (1) are both housed within the housing (30).

20. The motor (10) according to claim 18, wherein, The inner wall of the housing (30) is provided with an adhesive layer (31), and the magnet (20) is connected to the adhesive layer (31) by the adhesive (26); in the direction perpendicular to the preset direction, the size of the adhesive (26) is smaller than the sum of the sizes of the adhesive (26) and the adhesive layer (31).

21. The motor (10) according to claim 1, wherein, The second component (12) is movable relative to the first component (11) along a preset direction between a first position and a second position; the first component (11) includes a housing (111) having a cylindrical body formed therein; the second component (12) includes a magnetic structure disposed within the cylindrical body; the motor (10) further includes: A first bearing (115) is fixed to one of the first component (11) and the second component (12), and is slidably fitted to the other of the first component (11) and the second component (12); and The second bearing (124) is provided, the first bearing (115) and the second bearing (124) are spaced apart along the preset direction, the second bearing (124) is fixed to one of the first component (11) and the second component (12), and the second bearing (124) is slidably fitted to the other of the first component (11) and the second component (12); the distance between the first bearing (115) and the second bearing (124) is a first distance (H0); the first distance (H0) satisfies at least one of the following: The sum of the travel distance of the second component (12) from the first position to the second position and the height of the magnetic structure in the preset direction is the second distance (S1), H0≥2 / 5S1; The length of the cylinder in the preset direction is a third distance S2, H0≥2 / 5S2; The first component (11) further includes a first limiting part (11A) and a second limiting part (11B), the first limiting part (11A) and the second limiting part (11B) being located on opposite sides of the cylinder in the preset direction; when the second component (12) is in the first position, the second limiting part (11B) is in a limiting engagement with the second component (12); when the second component (12) is in the second position, the first limiting part (11A) is in a limiting engagement with the second component (12); the distance between the first limiting part (11A) and the second limiting part (11B) is a fourth distance (S3), H0≥2 / 5S3.

22. The motor according to claim 21, wherein, The first distance H0 ≤ H, and satisfies at least one of the following: H0 ≥ 1 / 2S1, H0 ≥ 1 / 2S2, and H0 ≥ 1 / 2S3, wherein H is the distance between the end of the first bearing (115) facing away from the second bearing (124) and the end of the second bearing (124) facing away from the first bearing (115).

23. The motor (10) according to claim 21, wherein, The second component (12) includes a mandrel (121), the first bearing (115) is fixed to the first component (11), the mandrel (121) is slidably inserted through the first bearing (115), and the maximum included angle between the axis of the mandrel (121) and the axis of the first bearing (115) is θ, where θ ≤ 0.05°.

24. The motor (10) according to claim 23, wherein, The maximum included angle θ satisfies: θ≤0.02°.

25. The motor according to claim 23 or 24, wherein, The difference X between the inner diameter of the first bearing (115) and the outer diameter of the mandrel (121) satisfies: 20μm≤X≤80μm.

26. The motor (10) according to any one of claims 23 to 25, wherein, The first component (11) includes: A guide member (114) is fixed to the housing (111); One of the mandrel (121) and the guide member (114) is provided with a guide hole (121A), and the other of the mandrel (121) and the guide member (114) is accommodated in the guide hole (121A); when the second component (12) moves relative to the first component (11), the other of the mandrel (121) and the guide member (114) moves in the guide hole (121A).

27. The motor according to any one of claims 23 to 26, wherein, The first component (11) includes: The guide (114) is fixed to the second assembly (12), and the guide (114) is slidably inserted into the second bearing (124); The difference Y between the inner diameter of the second bearing (124) and the outer diameter of the guide (114) satisfies: 20μm≤Y≤80μm.

28. The motor (10) according to any one of claims 23 to 27, wherein, The spindle (121) is provided with a guide hole (121A), and the second bearing (124) is housed in the guide hole (121A).

29. The motor (10) according to any one of claims 21 to 28, wherein, The housing (111) has a mounting hole (111A) at one end along a preset direction; the first bearing (115) is accommodated in the mounting hole (111A).

30. The motor (10) according to claim 29, wherein the first component (11) further comprises: A sealing element is disposed between the inner wall surface of the mounting hole (111A) and the outer peripheral surface of the spindle (121) of the second component (12), and is fixed to the housing (111). The spindle (121) is slidably fitted to the sealing element.

31. The motor (10) according to any one of claims 21 to 30, wherein the second component (12) further comprises: The third limiting part (12A) is connected to the magnetic structure; and A fourth limiting part (12B) is connected to the magnetic structure, and the fourth limiting part (12B) and the third limiting part (12A) are located on opposite sides of the magnetic structure in the preset direction; When the second component (12) is in the first position, the fourth limiting part (12B) is in a limiting engagement with the first component (11); When the second component (12) is in the second position, the third limiting part (12A) is limited and engaged with the first component (11).

32. The motor (10) according to claim 31, wherein, The first component (11) further includes a first limiting part (11A) and a second limiting part (11B), the first limiting part (11A) and the second limiting part (11B) being located on opposite sides of the cylinder in the preset direction; Along the direction from the first bearing (115) to the second bearing (124), the first limiting part (11A), the third limiting part (12A), the fourth limiting part (12B) and the second limiting part (11B) are arranged in sequence; when the second component (12) is in the first position, the fourth limiting part (12B) and the second limiting part (11B) are in a limiting engagement. When the second component (12) is in the second position, the first limiting part (11A) and the third limiting part (12A) are in a limiting engagement.

33. The motor (10) according to claim 32, wherein, The magnetic structure includes a winding assembly (122); the first assembly (11) further includes a magnet assembly (112), the magnet assembly (112) is disposed on the housing (111) and fixed to the housing (111), the winding assembly (122) cooperates with the magnet assembly (112) to drive the first assembly (11) to move relative to the winding assembly (122).

34. The motor (10) according to claim 33, wherein, The length of the magnet assembly (112) in the preset direction is the same as the length of the winding assembly (122) in the preset direction.

35. The motor (10) according to claim 34, wherein, The magnetic structure includes a winding assembly (122); the second assembly (12) further includes at least one iron core (123) and a mandrel (121), the at least one iron core (123) is fixed to the mandrel (121), and the winding assembly (122) is disposed on the at least one iron core (123).

36. The motor (10) according to claim 1, wherein, The motor (10) is a linear motor, and the first component (11) can reciprocate relative to the second component (12) in a preset direction. One of the first component (11) and the second component (12) includes a magnet.

37. The motor (10) according to claim 36, wherein the magnet (132) comprises a first magnetic sheet (211), a second magnetic sheet (212) and a third magnetic sheet (213) arranged circumferentially thereon, the second magnetic sheet (212) being disposed between the first magnetic sheet (211) and the third magnetic sheet (213), the first magnetic sheet (211) and the second magnetic sheet (212) being connected by a first connecting member (2140), the second magnetic sheet (212) and the third magnetic sheet (213) being connected by a second connecting member (2150), and the second magnetic sheet (212) having a predetermined outer wall surface (217); In the orthographic projection of the magnet (132) onto the preset plane, the distance from the inner wall surface of the first magnetic sheet (211) near the end of the second magnetic sheet (212) to the inner wall surface of the third magnetic sheet (213) near the end of the second magnetic sheet (212) is the first distance (W1), and the distance between the two endpoints of the preset outer wall surface (217) is the second distance (W2). The first distance (W1) is less than the second distance (W2); the preset plane is perpendicular to the axis of the magnet. or, In the orthographic projection of the magnet (132) onto the preset plane, the inner wall surfaces of the second magnetic sheet (212), the first connector (2140), and the second connector (2150) form a first arc segment; the preset outer wall surface (217) forms a second arc segment; the first arc segment and the second arc segment are concentrically arranged, and the length of the second arc segment is greater than the length of the first arc segment.

38. The motor (10) according to claim 37, wherein, The magnet (132) has a circular ring structure. The orthographic projection of the inner circumferential surface of the magnet (132) onto the preset plane is an inner circle, and the orthographic projection of the outer circumferential surface of the magnet (132) onto the preset plane is an outer circle. The inner circle and the outer circle are concentrically arranged.

39. The motor (10) according to claim 37 or 38, wherein, Along the circumference of the magnet (132), the thickness of the first connector (2140) is equal to the thickness of the second connector (2150).

40. The motor (10) according to any one of claims 37 to 39, wherein, The first connector (2140) and the second connector (2150) each include an adhesive (2100).

41. The motor (10) according to any one of claims 37 to 40, wherein, The first magnetic sheet (211) and the third magnetic sheet (213) are an integral piece; or, the first magnetic sheet (211) and the third magnetic sheet (213) are separate pieces.

42. The motor (10) according to claim 40 or 41, wherein, When at least one of the first connector (2140) and the second connector (2150) detaches, a portion of the second magnetic sheet (212) extends beyond the inner wall surface of at least one of the first magnetic sheet (211) and the third magnetic sheet (213).

43. The motor (10) according to any one of claims 37 to 42, wherein, The linear motor includes the second component (12), and the second component (12) includes the magnet (132).

44. The motor (10) according to claim 43, wherein, The linear motor further includes the first component (11), and the first component (11) is the stator component. The second component (12) is sleeved on the outer periphery of the first component (11), and the second component (12) can move relative to the first component (11) along the axial direction of the magnet (21).

45. The motor (10) according to claim 43 or 44, wherein, The second component (12) includes a plurality of magnets (132) stacked along the axial direction of the magnets (132).

46. ​​The motor (10) according to claim 45, wherein, The second component (12) further includes a magnet mounting component (121), wherein the magnet (132) is disposed on the magnet mounting component (121).

47. The motor (10) according to any one of claims 43 to 46, wherein, There is an air gap between the first component (11) and the second component (12). The air gap is the gap between the inner peripheral surface of the magnet (21) and the outer peripheral surface of the first component (11). Along the radial direction of the magnet (132), the size of the air gap is a first spacing L3. At least one of the first connector (2140) and the second connector (2150) has a dimension E1 in the circumferential direction of the magnet that satisfies the first distance L3: E1 / (tan(360°) / 2N)<L3. The magnet (132) is an annular magnet formed by connecting multiple magnetic sheets in sequence, where N is the number of magnetic sheets. The multiple magnetic sheets include the first magnetic sheet (211), the second magnetic sheet (212), and the third magnetic sheet (213).

48. The motor (10) according to claim 47, wherein, When the second magnetic sheet (212) extends beyond the inner wall surface of at least one of the first magnetic sheet (211) and the third magnetic sheet (213), the maximum distance between the preset outer wall surface (217) and the outer wall surface of at least one of the first magnetic sheet (211) and the third magnetic sheet (213) in the radial direction of the magnet (21) is a second distance M, where M < L3.

49. The motor (10) according to claim 48, wherein, When the second magnetic sheet (212) is located in the preset position (Z1), the preset inner wall surface (216), the inner wall surface of the first magnetic sheet (211), and the inner wall surface of the third magnetic sheet (213) are located on the same arc surface, and the minimum distance E2 between the second magnetic sheet (212) and the magnet mounting part (121) is less than or equal to the first distance L3.

50. The motor (10) according to claim 48, wherein, When the second magnetic sheet (212) is located in the preset position (Z1), the preset inner wall surface (216), the inner wall surface of the first magnetic sheet (211), and the inner wall surface of the third magnetic sheet (213) are located on the same arc surface, and the minimum distance E2 between the second magnetic sheet (212) and the magnet mounting component (1) satisfies: 0.25L3≤E2≤1.25L3.

51. The motor (10) according to claim 50, wherein, The first component (11) includes a center component (3) and a winding assembly (4A) sleeved on the center component (3); The winding assembly (4A) cooperates with the magnet (132) to drive the second assembly (12) to move relative to the first assembly (11).

52. A suspension assembly (200) comprising a motor (10) according to any one of claims 1-51.

53. The suspension assembly (200) according to claim 52, comprising: The motor, wherein the motor is the motor (10) according to any one of claims 21-35; and A tower top assembly (112) is disposed in one of the first assembly (11) and the second assembly (12) of the motor (10), and the tower top assembly (112) is adapted to connect to the vehicle body (101).

54. The suspension assembly (200) according to claim 53 further includes a spring disposed between the tower top assembly (112) and another of the first assembly (11) and the second assembly (12), wherein the other of the first assembly (11) and the second assembly (12) is adapted to connect a wheel (102).

55. The suspension assembly (200) according to claim 53 or 54 further includes a wishbone (113) adapted to connect the other of the first assembly (11) and the second assembly (12) to the wheel (102).

56. The suspension assembly (200) according to claim 52, comprising: The motor, wherein the motor is the motor (10) according to any one of claims 36-51, wherein the motor (10) further comprises: Fork arm (113), said fork arm (113) being connected to the second component (12); and Top cover (301), which is connected to the first component (11).

57. The suspension assembly (200) according to claim 56, further comprising: A lower support (125) is disposed on the second component (12); as well as An elastic element (40) is disposed between the lower support (125) and the top cover (301).

58. A vehicle (100) comprising at least one of the following: The motor (10) according to any one of claims 1-51; and The suspension assembly (200) according to any one of claims 52-57.

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