Linear motor, suspension system, and vehicle

Abstract

A linear motor, a suspension system, and a vehicle. The linear motor comprises a stator assembly, a rotor assembly, and a first buffer member, the stator assembly and the rotor assembly being coupled to enable the rotor assembly to reciprocate. The stator assembly comprises a stator core, and the first buffer member is arranged between the stator core and the rotor assembly. When the rotor assembly moves to a first limit position relative to the stator assembly in a first direction of an axial direction, the first buffer member is compressed. When the rotor assembly moves to a second limit position relative to the stator assembly in a second direction of the axial direction, an axial spacing is formed between the rotor assembly and the stator core in the axial direction. The first direction and the second direction are two opposite directions in the axial direction. The first limit position is an upper limit position, and the second limit position is a lower limit position.

Description

Linear motors, suspension systems and vehicles

[0001] This application claims priority to Chinese patent application No. 202410669001.9, filed on May 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of linear motor technology, and more particularly to a linear motor, suspension system, and vehicle. Background Technology

[0003] In related technologies, a linear motor includes a mover assembly and a stator assembly, wherein the mover assembly is movably sleeved on the outside of the stator assembly and coupled with the stator assembly. Summary of the Invention

[0004] This disclosure aims to address at least one of the technical problems existing in the related art.

[0005] On the one hand, this disclosure proposes a linear motor that can prevent the mover assembly from mechanically impacting the stator core when it exceeds the first limit position, and can also prevent the mover assembly from mechanically impacting the stator core when it is at the second limit position.

[0006] A linear motor according to some embodiments of this disclosure includes a stator assembly, a mover assembly, and a first buffer member, wherein the stator assembly and the mover assembly are coupled to allow the mover assembly to reciprocate. The stator assembly includes a stator core, and the first buffer member is disposed between the stator core and the mover assembly. When the mover assembly moves relative to the stator assembly in a first axial direction to a first extreme position, the first buffer member is compressed. When the mover assembly moves relative to the stator assembly in a second axial direction to a second extreme position, an axial gap is provided between the mover assembly and the stator core. The first direction and the second direction are two opposite axial directions, the first extreme position is an upper extreme position, and the second extreme position is a lower extreme position.

[0007] According to some embodiments of the linear motor disclosed herein, by configuring the mover assembly to contact the first buffer member when it moves to the first limit position, the first buffer member can limit the mover assembly to prevent the mover assembly from exceeding the first limit position and causing mechanical impact with the stator core. Furthermore, by configuring the mover assembly to be axially spaced from the upper end of the stator core when it moves to the second limit position, mechanical impact between the mover assembly and the stator core at the second limit position is avoided, thereby improving the design rationality of the linear motor.

[0008] According to some embodiments of the linear motor disclosed herein, the first buffer is disposed at the lower end of the stator core.

[0009] According to some embodiments of the linear motor disclosed herein, the stator assembly further includes a stator spindle, the stator core is sleeved on the stator spindle, and the first buffer member is fixed to the stator spindle.

[0010] The linear motor according to some embodiments of the present disclosure further includes a fixed connector, the fixed connector being fixed to the stator spindle, and the first buffer being connected to the fixed connector.

[0011] According to some embodiments of the linear motor disclosed herein, the fixed connector includes a fixed part and a hook part connected together. The fixed part is fixed to the stator spindle, and a hook groove is defined between the lower end faces of the hook part and the fixed part. A portion of the first buffer member is installed in the hook groove.

[0012] According to some embodiments of the linear motor disclosed herein, the mover assembly includes a housing and a guide rod, the guide rod being disposed inside the housing and connected to the housing, the guide rod extending into the stator spindle and movably engaging with the stator spindle, and the first buffer member being sleeved on the guide rod.

[0013] According to some embodiments of the linear motor disclosed herein, at least one of the outer or inner peripheral walls of the first buffer member is provided with a plurality of buffer grooves.

[0014] According to some embodiments of the linear motor disclosed herein, the stator assembly further includes a second buffer member located at the upper end of the stator core. In the second extreme position, the second buffer member is axially spaced from the mover assembly.

[0015] A linear motor according to some embodiments of the present disclosure further includes: a first sensor and a sensor head, the first sensor being disposed on the stator assembly, and the sensor head being disposed on the mover assembly. The sensor head and the first sensor are coupled to detect the moving position of the mover assembly.

[0016] According to some embodiments of the linear motor disclosed herein, the stator assembly further includes a stator mandrel, the stator mandrel includes a shaft body and an outer sleeve, the stator core is disposed on the shaft body, the first sensing element is disposed on the outer peripheral wall of the shaft body, and the outer sleeve is fitted onto the outer peripheral wall of the shaft body to cover the first sensing element.

[0017] According to some embodiments of the linear motor disclosed herein, the lower end of the outer casing is provided with a stop boss, and the second buffer member is placed on the stop boss.

[0018] According to some embodiments of the linear motor disclosed herein, the axial spacing between the mover assembly and the stator core is 1mm-6mm.

[0019] According to some embodiments of the linear motor disclosed herein, the stator assembly further includes a stator mandrel, the stator core is sleeved on the stator mandrel, the stator mandrel includes a shaft wall, the shaft wall is provided with cooling water channels extending axially along the stator mandrel, the shaft wall is provided with water channel openings, the water channel openings are connected to a first end of the cooling water channels; and a winding assembly is disposed on the stator core, the cooling water channels include a first cooling water channel, the first cooling water channel exchanges heat with the winding assembly.

[0020] According to some embodiments of the linear motor disclosed herein, the cooling water channel further includes a second cooling water channel. The second cooling water channel and the first cooling water channel are arranged sequentially along the axial direction of the stator spindle, and the opening of the water channel communicates with the second cooling water channel.

[0021] The linear motor according to some embodiments of this disclosure further includes a conductive component, the shaft wall surrounds a wiring space, the conductive component is disposed in the wiring space, the conductive component is coupled to the winding assembly and the motor controller respectively, and the second cooling water channel exchanges heat with the conductive component.

[0022] On the other hand, some embodiments of this disclosure also propose a suspension system.

[0023] A suspension system according to some embodiments of the present disclosure includes a linear motor as described in the above embodiments.

[0024] On the other hand, some embodiments of this disclosure also propose a vehicle.

[0025] Vehicles according to some embodiments of this disclosure include the suspension system described in the above embodiments.

[0026] The suspension system and the vehicle described herein have the same advantages over related technologies, and will not be elaborated further here.

[0027] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0028] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 is a cross-sectional view of a linear motor according to some embodiments of the present disclosure;

[0030] Figure 2 is a magnified view of a portion of circle A in Figure 1;

[0031] Figure 3 is a magnified view of a portion of circle B in Figure 1;

[0032] Figure 4 is a magnified view of the area circled C in Figure 1;

[0033] Figure 5 is a structural diagram of a stator mandrel according to some embodiments of the present disclosure;

[0034] Figure 6 is a cross-sectional view of a stator mandrel according to some embodiments of the present disclosure;

[0035] Figure 7 is a simulation diagram of a cooling flow channel according to some embodiments of the present disclosure;

[0036] Figure 8 is a structural diagram of a suspension system according to some embodiments of the present disclosure; and

[0037] Figure 9 is a block diagram of a vehicle according to some embodiments of the present disclosure.

[0038] Reference numerals: Vehicle 1000, Linear motor 100, Suspension system 200, Stator assembly 1, Stator core 11, Stator spindle 12, Shaft body 121, Outer sleeve 122, Stop boss 1221, Deformation space 1222, Shaft wall 123, Cooling water channel 124, First cooling water channel 1241, Second cooling water channel 1242, Water channel opening 1243, Hollow cavity 125, Wiring space 126, Winding assembly 13, Second buffer 14, Mover assembly 2, Outer shell 21, Inner bottom wall 21a, Inner top wall 21b, Guide rod 22, First buffer 3, Buffer groove 31, Connecting flange 32, Fixed connector 4, Fixed part 41, Hook part 42, Hook groove 43, First sensor 5, Sensor reading head 6, Conductive component 7. Detailed Implementation

[0039] The embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this disclosure, and should not be construed as limiting this disclosure.

[0040] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this disclosure and 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, and therefore should not be construed as a limitation of this disclosure. Furthermore, features 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.

[0041] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" 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 mechanical connection, an electrical connection, or a coupling; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0042] In related technologies, when the mover assembly moves away from the stator assembly, if the movement amplitude is too large, it may cause mechanical impact between the mover assembly and the stator assembly, resulting in structural damage.

[0043] Hereinafter, with reference to the accompanying drawings, a linear motor 100 according to some embodiments of the present disclosure will be described.

[0044] As shown in Figures 1-8, a linear motor 100 according to some embodiments of this disclosure includes: a stator assembly 1, a mover assembly 2, and a first buffer 3. The stator assembly 1 and the mover assembly 2 are coupled so that the mover assembly 2 can reciprocate. The stator assembly 1 includes a stator core 11, and the first buffer 3 is disposed between the stator core 11 and the mover assembly 2. When the mover assembly 2 moves relative to the stator assembly 1 in a first axial direction to a first limit position, the first buffer 3 and the mover assembly 2 are compressed. When the mover assembly 2 moves relative to the stator assembly 1 in a second axial direction to a second limit position, an axial gap is provided between the mover assembly 2 and the stator core 11. It should be noted that the first direction and the second direction are two opposite directions in the axial direction, the first limit position is the upper limit position, and the second limit position is the lower limit position.

[0045] Therefore, it is possible to avoid the mover assembly 2 from exceeding the first limit position and causing mechanical impact with the stator core 11, and it is also possible to avoid the mover assembly 2 from causing mechanical impact with the stator core 11 at the second limit position, thereby improving the design rationality of the linear motor 100.

[0046] First, as shown in Figures 1-3, the linear motor 100 includes a stator assembly 1 and a mover assembly 2. The upper end of the stator assembly 1 is connected to the frame, and the lower end of the mover assembly 2 is connected to the wheel. The mover assembly 2 is constructed in a cylindrical shape and is movably fitted onto the outside of the stator assembly 1, and is coupled to the stator assembly 1. This allows the mover assembly 2 to reciprocate relative to the stator assembly 1 along the axial direction (refer to the x-direction shown in Figure 1), and the mover assembly 2 can move to a first limit position along a first axial direction and to a second limit position along a second axial direction. It should be noted that the first and second directions are two opposite directions axially; for example, the first direction is upward and the second direction is downward. The first limit position can be the upper limit position, and the second limit position can be the lower limit position.

[0047] In some embodiments, the stator assembly 1 includes a stator core 11. The linear motor 100 also includes a first buffer 3, which may be made of an elastic material such as rubber, and is configured to be installed between the stator core 11 and the mover assembly 2. When the mover assembly 2 moves relative to the stator assembly 1 in a first axial direction to a first limit position, the stator core 11 can contact the mover assembly 2 through the first buffer 3, and the first buffer 3 is compressed. Furthermore, the mover assembly 2 may be provided with an inner top wall 21b opposite to the upper end of the stator core 11. When the mover assembly 2 moves relative to the stator assembly 1 in a second axial direction to a second limit position, the inner top wall 21b of the mover assembly 2 and the upper end of the stator core 11 are axially spaced.

[0048] Understandably, the mover assembly 2 also has an inner bottom wall 21a opposite to the lower end of the stator core 11. When the frame and wheels approach each other, the mover assembly 2 can move relative to the stator assembly 1 in a first axial direction. At this time, the inner bottom wall 21a of the mover assembly 2 can contact and compress the first buffer member 3, which can buffer and absorb energy. When the mover assembly 2 moves to the first limit position, the first buffer member 3 can limit the mover assembly 2, preventing it from exceeding the first limit position and causing mechanical impact with the stator core 11. When the frame and wheels move away from each other, the mover assembly 2 can move relative to the stator assembly 1 in a second axial direction. Due to the limitations of the vehicle structure, the mover assembly 2 can usually only move to the second limit position. At this time, the inner top wall 21b of the mover assembly 2 can maintain an axial distance from the upper end of the stator core 11 to avoid mechanical impact between the mover assembly 2 and the stator core 11.

[0049] It should be noted that when the linear motor 100 is used in an electromagnetic suspension, there are many situations where the mover assembly 2 moves upward relative to the stator assembly 1 (such as going over speed bumps, going up or down slopes, braking, heavy loads, etc.). Therefore, a first buffer 3 is required, rather than relying solely on controlling the thrust of the linear motor 100 to achieve the upper travel limit. Since there are few situations where the mover assembly 2 moves downward relative to the stator assembly 1, i.e., the lower travel condition, the lower travel limit can be achieved simply by controlling the thrust of the linear motor 100. Under these circumstances, the failure probability of the linear motor 100 is also not high.

[0050] In some embodiments, the stator assembly 1 further includes a winding assembly 13 disposed on the stator core 11. The linear motor 100 operates by generating a magnetic field when the winding assembly 13 is energized. The magnetic field induces electromagnetic interaction with the mover assembly 2, thereby generating a thrust that drives the mover assembly 2 to move upward. In addition, the magnitude of the thrust is controlled by controlling the magnitude of the current supplied, and the compression amount of the first buffer 3 is controlled according to the magnitude of the spring compression restoring force and the magnitude of the thrust.

[0051] This prevents the stator assembly 1 and the mover assembly 2 from colliding or interfering, thus avoiding impact on the service life of the linear motor 100. Furthermore, it reduces the axial length of the linear motor 100. It should be noted that the axial dimension of the compressible buffer (e.g., the first buffer 3) is generally between 45mm and 57mm, and the buffer can be compressed to 2 / 3 of the aforementioned axial dimension (e.g., a 45mm long buffer can be compressed to 30mm), thereby reducing the axial space occupied by the buffer.

[0052] It is important to emphasize that the compressible dimension of the first buffer 3 is between 1 / 3 and 1 / 2 of the upward stroke. Since the thrust of the linear motor 100 is relatively large during the upward stroke, if the compressible dimension is short, it means that the axial dimension of the first buffer 3 is small, and the first buffer 3 is easily affected by the large thrust and will fail.

[0053] In some embodiments, the upward travel of the linear motor 100 is between 40mm and 70mm, and the downward travel is between 40mm and 70mm. This optimizes the structure of the linear motor 100, ensures its operational reliability, and improves its practicality.

[0054] According to some embodiments of the linear motor 100 disclosed herein, by setting the mover assembly 2 to contact the first buffer member 3 when it moves to the first limit position, the first buffer member 3 can limit the mover assembly 2 to avoid the mover assembly 2 from exceeding the first limit position and causing mechanical impact with the stator core 11. Furthermore, by setting the mover assembly 2 to be axially spaced from the upper end of the stator core 11 when it moves to the second limit position, mechanical impact between the mover assembly 2 and the stator core 11 at the second limit position is avoided, thereby improving the design rationality of the linear motor 100.

[0055] In some embodiments of this disclosure, as shown in Figures 1 and 2, a first buffer 3 is disposed at the lower end of the stator core 11, and a mover assembly 2 has an inner bottom wall 21a opposite to the lower end of the stator core 11. When the mover assembly 2 moves relative to the stator assembly 1 in a first axial direction to a first limit position, the first buffer 3 can contact the inner bottom wall 21a of the mover assembly 2, and the first buffer 3 is compressed. This simplifies the arrangement of the first buffer 3 and improves the design rationality of the linear motor 100.

[0056] In some embodiments of this disclosure, the stator assembly 1 further includes a stator mandrel 12, a stator core 11 is sleeved on the stator mandrel 12, and a first buffer member 3 is fixed to the stator mandrel 12.

[0057] For example, referring to Figures 1-2, the stator assembly 1 further includes a stator spindle 12, with the stator core 11 sleeved on the stator spindle 12. A first buffer member 3 can be fixed to the lower end of the stator spindle 12 so that the first buffer member 3 can be opposite to the inner bottom wall 21a of the mover assembly 2. It should be noted that the first buffer member 3 can be constructed as a ring so that it can circumferentially separate the stator spindle 12 from the inner bottom wall 21a of the mover assembly 2.

[0058] The above settings can reduce the installation difficulty of the first buffer 3 and improve the installation stability of the first buffer 3, which is conducive to improving the limiting effect of the first buffer 3.

[0059] In some embodiments of this disclosure, the linear motor 100 further includes a fixed connector 4, which is fixed to the stator spindle 12, and the first buffer 3 is connected to the fixed connector 4.

[0060] For example, as shown in Figures 1-2, the linear motor 100 also includes a fixing connector 4, which is constructed as a ring and is sleeved and fixed to the stator spindle 12, and is located below the stator core 11. The fixing connector 4 can limit the stator core 11 to fix it on the stator spindle 12, and the first buffer member 3 can be hooked onto the fixing connector 4 to be fixedly connected to the stator spindle 12.

[0061] It is understandable that the fixed connector 4 and the first buffer 3 are molded separately, which reduces the processing difficulty. During the installation process, the fixed connector 4 and the first buffer 3 can be assembled first, and then the fixed connector 4 and the first buffer 3 can be assembled together onto the stator spindle 12. The installation difficulty is relatively low. In addition, the installation stability of the first buffer 3 is improved, thereby improving the practicality of the linear motor 100.

[0062] In some embodiments of this disclosure, the fixed connector 4 includes a fixed part 41 and a hook part 42 connected together. The fixed part 41 is fixed to the stator spindle 12. The lower end faces of the hook part 42 and the fixed part 41 define a hook groove 43. A portion of the first buffer 3 is installed in the hook groove 43.

[0063] For example, as shown in Figures 1-2, the fixed connector 4 includes a fixing part 41 and a hook part 42. The fixing part 41 and the hook part 42 are arranged sequentially and connected along the axial direction of the mover assembly 2 (refer to the x direction shown in Figure 1). The fixing part 41 is configured to be fixedly connected to the stator spindle 12 to mount the fixed connector 4 on the stator spindle 12. The hook part 42 includes a body and a flange. The body is circumferentially connected to the lower edge of the fixing part 41, and the flange is connected to the lower side of the body. The flange extends radially inward to face the lower end face of the fixing part 41, thereby defining an inwardly open hook groove 43 between the lower end faces of the hook part 42 and the fixing part 41.

[0064] In addition, a connecting flange 32 can be provided at the upper end of the first buffer member 3. The connecting flange 32 is matched with the hook groove 43 and can be installed into the hook groove 43 to connect with the fixed connector 4. Through the above settings, the installation difficulty of the first buffer member 3 can be reduced and the installation stability of the first buffer member 3 can be improved, which is conducive to ensuring the limiting effect of the first buffer member 3.

[0065] In some embodiments of this disclosure, as shown in FIG2, an internal thread may be provided on the inner peripheral wall of the fixing part 41, and an external thread may be provided on the outer peripheral wall of the stator spindle 12. The internal thread is configured to engage with the external thread to detachably fix the fixing connector 4 to the stator spindle 12. This facilitates subsequent maintenance of the linear motor 100.

[0066] Of course, this disclosure is not limited to this. The fixing part 41 may be snapped together with the stator spindle 12, or the fixing part 41 may be connected to the stator spindle 12 through a connector. This disclosure does not limit this.

[0067] In some embodiments of this disclosure, the mover assembly 2 includes a housing 21 and a guide rod 22. The guide rod 22 is disposed inside the housing 21 and connected to the housing 21. The guide rod 22 extends into the stator spindle 12 and is movablely engaged with the stator spindle 12. The first buffer member 3 is sleeved on the guide rod 22.

[0068] For example, as shown in Figures 1, 2, and 6, the mover assembly 2 includes a housing 21 and a guide rod 22. The housing 21 is fitted onto the outside of the stator assembly 1. The guide rod 22 is connected to the inner bottom wall 21a of the housing 21 and extends along the axial direction of the mover assembly 2 (refer to the x-direction shown in Figure 1). The stator spindle 12 is provided with a hollow cavity 125, which is configured to allow the guide rod 22 to extend into, so that the guide rod 22 can move in conjunction with the stator spindle 12. Thus, when the mover assembly 2 moves relative to the stator assembly 1, the guide rod 22 can move within the hollow cavity 125. The hollow cavity 125 provides space for the movement of the guide rod 22, which is beneficial for the miniaturization design of the linear motor 100. The stator spindle 12 also guides the guide rod 22 to ensure the motion stability of the mover assembly 2.

[0069] In addition, the first buffer 3 can be fitted over the guide rod 22. In this way, when the mover assembly 2 moves upward relative to the stator assembly 1 and the inner bottom wall 21a of the mover assembly 2 presses against the first buffer 3, the guide rod 22 can limit the first buffer 3 so that the first buffer 3 can deform along the axial direction of the mover assembly 2, which helps to improve the limiting effect of the first buffer 3 and improves the installation stability of the first buffer 3.

[0070] The above settings can improve the motion stability of the mover assembly 2, which is conducive to improving the operational reliability of the linear motor 100 and enhancing the overall performance of the linear motor 100.

[0071] In some embodiments of this disclosure, as shown in FIG2, at least one of the outer peripheral wall or the inner peripheral wall of the first buffer member 3 is provided with a plurality of buffer grooves 31. For example, a plurality of buffer grooves 31 may be provided on the outer peripheral wall of the first buffer member 3, and the plurality of buffer grooves 31 on the outer peripheral wall are arranged sequentially along the axial direction of the guide rod 22; or, a plurality of buffer grooves 31 may be provided on the inner peripheral wall of the first buffer member 3, and the plurality of buffer grooves 31 on the inner peripheral wall are arranged sequentially along the axial direction of the guide rod 22; or, a plurality of buffer grooves 31 may be provided on both the outer peripheral wall and the inner peripheral wall of the first buffer member 3, and the plurality of buffer grooves 31 on the outer peripheral wall and the plurality of buffer grooves 31 on the inner peripheral wall may correspond one-to-one radially or may be staggered, and this disclosure does not limit this. For example, the buffer groove 31 may be constructed as an annular groove extending circumferentially along the first buffer member 3.

[0072] Of course, this disclosure is not limited to this, and multiple buffer slots 31 can also be set at intervals along the circumference of the first buffer member 3.

[0073] It is understandable that by providing a buffer groove 31 on the first buffer 3, the energy absorption effect of the first buffer 3 can be improved, and the overall weight of the first buffer 3 can be reduced, thereby improving the practicality of the first buffer 3.

[0074] In some embodiments of this disclosure, the stator assembly 1 further includes a second buffer 14 located at the upper end of the stator core 11. In the second extreme position, the second buffer 14 is axially spaced from the mover assembly 2.

[0075] For example, referring to Figures 1 and 3, the stator assembly 1 includes a stator spindle 12 and a second buffer member 14. The stator core 11 is sleeved on the outside of the stator spindle 12 and configured to couple with the mover assembly 2. The second buffer member 14 is constructed as a ring and is sleeved on the upper section of the stator spindle 12 and located at the upper end of the stator core 11. When the mover assembly 2 moves downward, the inner top wall 21b of the mover assembly 2 can move downward close to the second buffer member 14, and when the mover assembly 2 moves downward to the second limit position, the upper end of the second buffer member 14 can maintain a distance from the inner top wall 21b of the mover assembly 2 along the axial direction. It should be noted that the second buffer member 14 can be made of an elastic material such as rubber or a rigid material such as plastic.

[0076] It is understandable that by setting the mover assembly 2 to be axially spaced from the second buffer member 14 at the second limit position, the second buffer member 14 can be prevented from affecting the normal operation of the mover assembly 2. The second buffer member 14 can also be configured as a preventive component. When the mover assembly 2 moves downward relative to the stator assembly 1 and exceeds the second limit position, the second buffer member 14 can abut against the inner top wall 21b of the mover assembly 2 to limit the mover assembly 2, thereby preventing the mover assembly 2 from directly impacting the stator core 11 and improving the reliability of the linear motor 100.

[0077] In some embodiments of this disclosure, the linear motor 100 further includes a first sensor 5 and a sensor head 6. The first sensor 5 is disposed on the stator assembly 1, and the sensor head 6 is disposed on the mover assembly 2. The sensor head 6 and the first sensor 5 are coupled to detect the moving position of the mover assembly 2.

[0078] For example, referring to Figures 1 and 3-5, the linear motor 100 further includes a first sensing element 5 and a sensing head 6. The first sensing element 5 is mounted on the outer peripheral wall of the stator assembly 1 and is disposed opposite to the mover assembly 2. The sensing head 6 is disposed at the upper end of the mover assembly 2, and the sensing head 6 is opposite to the first sensing element 5 along the radial direction of the mover assembly 2. The sensing head 6 is configured to couple with the first sensing element 5 so that the sensing head 6 can detect the position of the mover assembly 2, thereby determining the operating state of the linear motor 100. For example, the first sensing element 5 can be a magnetic sensing element, and the sensing head 6 can be a magnetic sensing head.

[0079] Understandably, when the sensor 6 detects that the mover assembly 2 has moved downward beyond the second limit position, the control system can determine that the vehicle has malfunctioned. At this time, the control system can control the vehicle to prompt the user so that the user can stop the vehicle in time for inspection and repair, which helps to improve driving reliability.

[0080] In some embodiments of this disclosure, the stator mandrel 12 includes a shaft body 121 and an outer sleeve 122. The stator core 11 is disposed on the shaft body 121, and the first sensing element 5 is disposed on the outer peripheral wall of the shaft body 121. The outer sleeve 122 is fitted onto the outer peripheral wall of the shaft body 121 to cover the first sensing element 5.

[0081] For example, referring to Figures 1 and 3-5, the stator spindle 12 includes a shaft body 121 and an outer sleeve 122. The shaft body 121 extends along the axial direction of the rotor assembly 2 (refer to the x-direction shown in Figure 1), and the stator core 11 is sleeved on the shaft body 121. The outer peripheral wall of the portion of the shaft body 121 above the stator core 11 is provided with a mounting groove, which extends axially. The first sensing element 5 is matched with the mounting groove and can be installed in the mounting groove. In addition, the outer sleeve 122 can be constructed as a cylinder. The outer sleeve 122 can be made of insulating material such as rubber. The outer sleeve 122 is sleeved on the outer peripheral wall of the portion of the shaft body 121 with the mounting groove to cover the first sensing element 5, thereby insulatingly separating the first sensing element 5 from the sensing head 6.

[0082] The above settings can improve the installation stability of the first sensing element 5 and avoid direct contact between the first sensing element 5 and the sensing head 6, which is conducive to improving the accuracy of position detection and improving the reliability of the linear motor 100.

[0083] In some embodiments of this disclosure, as shown in Figures 1 and 3, a stop boss 1221 may be provided at the lower end of the outer sleeve 122, and the stop boss 1221 is arranged to protrude radially outward. The second buffer member 14 is constructed as an annular ring, and the second buffer member 14 may be sleeved on the outside of the outer sleeve 122 and placed on the stop boss 1221.

[0084] With the above configuration, the outer sleeve 122 can support the second buffer 14 radially, and the stop boss 1221 can support the second buffer 14 axially, which helps to improve the installation stability of the second buffer 14 and ensures the buffering effect of the second buffer 14.

[0085] In some embodiments of this disclosure, as shown in FIG3, a deformation space 1222 may be provided on the radially inner side of the upper sidewall of the stop boss 1221. When the second buffer member 14 is deformed by impact, the deformation space 1222 can reserve buffer space for the second buffer member 14. This helps to reduce the impact between the mover assembly 2 and the stator assembly 1.

[0086] In some embodiments of this disclosure, the axial spacing between the mover assembly 2 and the stator core 11 can be set to 1mm-6mm, such as 2mm, 3mm, 4mm, 5mm, etc. For example, the axial spacing between the mover assembly 2 and the stator core 11 can be set to 3mm-5mm. This provides sufficient buffer space and improves the reliability of the linear motor 100.

[0087] In some embodiments of this disclosure, as shown in Figures 1 and 6, the stator assembly 1 includes a stator mandrel 12 and a winding assembly 13, with the stator core 11 sleeved on the stator mandrel 12. The stator mandrel 12 also includes a shaft wall 123, within which a cooling water channel 124 extending axially along the stator mandrel 12 is provided. The shaft wall 123 has a water channel opening 1243, which communicates with a first end of the cooling water channel 124. The winding assembly 13 is disposed on the stator core 11, and the cooling water channel 124 includes a first cooling water channel 1241, which exchanges heat with the winding assembly 13.

[0088] For example, referring to Figures 1, 6 and 7, the stator assembly 1 includes a stator core 11, a stator spindle 12 and a winding assembly 13. The stator core 11 is configured to be sleeved on the outer peripheral wall of the stator spindle 12. The stator core 11 has a receiving space inside, and the winding assembly 13 is installed in the receiving space of the stator core 11.

[0089] The stator spindle 12 also includes a shaft wall 123, in which a cooling water channel 124 extending axially along the stator spindle 12 is provided. The shaft wall 123 is provided with a water channel opening 1243, which is connected to the first end of the cooling water channel 124. The water channel opening 1243 is configured to be connected to the vehicle cooling circuit, so that the cooling water channel 124 can be integrated with the vehicle cooling circuit.

[0090] In some embodiments, the cooling channel 124 includes a first cooling channel 1241, which exchanges heat with the winding assembly 13. It is understood that the winding assembly 13 generates heat during operation. The cooling channel 124 is provided within the shaft wall 123 of the stator mandrel 12, allowing the stator mandrel 12 to function as a cooling structure. This integrates the cooling function of the stator mandrel 12, eliminating the need for an additional cooling structure in the stator assembly 1. This reduces the number of parts in the stator assembly 1 and lowers its manufacturing cost.

[0091] Since the stator spindle 12 can directly contact the winding assembly 13, the first cooling water channel 1241 in the stator spindle 12 can fully exchange heat with the winding assembly 13, which improves the cooling effect on the winding assembly 13, thereby improving the working reliability and working efficiency of the stator assembly 1.

[0092] In some embodiments, cooling channels 124 are disposed on the shaft wall 123 and include a first cooling channel 1241 adapted for heat exchange with the winding assembly 13. It is understood that the space for the first cooling channel 1241 is limited due to the spatial constraints of the shaft wall 123. To ensure effective heat exchange between the first cooling channel 1241 and the winding assembly 13, the first cooling channel 1241 should be able to cover a large area of ​​the shaft wall 123 to increase the contact area between the first cooling channel 1241 and the winding assembly 13, thereby improving the heat dissipation effect of the winding assembly 13. Therefore, in the axial direction of the stator spindle 12, the cross-sectional area of ​​the first cooling channel 1241 should be larger than the area of ​​the channel opening 1243. It should be noted that having a larger cross-sectional area for the first cooling channel 1241 than the area of ​​the channel opening 1243 can also reduce the inlet water pressure of the channel opening 1243, ensuring the operational stability of the stator spindle 12.

[0093] It is understandable that by providing cooling channels 124 inside the shaft wall 123 of the stator mandrel 12 to integrate the cooling function of the stator mandrel 12, the number of parts of the stator assembly 1 can be reduced, and the manufacturing cost of the stator assembly 1 can be reduced.

[0094] In some embodiments of this disclosure, as shown in Figures 1, 6, and 7, the cooling channel 124 further includes a second cooling channel 1242, which is connected to the first cooling channel 1241. Along the axial direction of the stator spindle 12, the second cooling channel 1242 and the first cooling channel 1241 are arranged sequentially, and the channel opening 1243 is directly connected to the second cooling channel 1242. Here, in the direction from the upper end to the lower end of the shaft wall 123, the second cooling channel 1242 and the first cooling channel 1241 are arranged sequentially, with the second cooling channel 1242 located upstream of the first cooling channel 1241 and the first cooling channel 1241 located downstream of the second cooling channel 1242.

[0095] In some embodiments, the first cooling channel 1241 is positioned corresponding to the first portion of the stator spindle 12. The first portion of the stator spindle 12 may be provided with a first structural component, and the first cooling channel 1241 can exchange heat with the first structural component. In some embodiments, the first structural component includes a winding assembly 13. The second cooling channel 1242 is positioned corresponding to the second portion of the stator spindle 12. The second portion of the stator spindle 12 may be provided with a second structural component, and the second cooling channel 1242 can exchange heat with the second structural component. In some embodiments, the second structural component includes a conductive component 7. Multiple cooling channels 124 are formed within the shaft wall 123 of the stator spindle 12, allowing for heat exchange with various structures, meeting the heat exchange requirements of multiple structures, ensuring the heat exchange effect of the linear motor 100, and thus ensuring the normal operation of the linear motor 100.

[0096] In some embodiments of this disclosure, as shown in FIG7, the cross-sectional area of ​​the first cooling channel 1241 can be set to be larger than the cross-sectional area of ​​the second cooling channel 1242. It is understood that, since the cooling channel 124 is located within the shaft wall 123 of the stator mandrel 12, to ensure the structural strength of the shaft wall 123, the radial dimension of the cooling channel 124 in the shaft wall 123 should not be too large. Furthermore, to ensure the flow rate of the cooling medium within the cooling channel 124 and thus guarantee the heat exchange effect of the cooling channel 124, the radial dimension of the cooling channel 124 in the shaft wall 123 should not be too small. Therefore, designing the first cooling channel 1241 to have a cross-sectional area larger than that of the second cooling channel 1242 can ensure both the heat exchange effect on the winding assembly 13 and the structural strength of the stator mandrel 12.

[0097] In some embodiments of this disclosure, the shaft wall 123 surrounds the wiring space 126, and the wiring space 126 is provided with a conductive component 7. The conductive component 7 is coupled to the winding assembly 13 and the motor controller respectively, and the second cooling water channel 1242 exchanges heat with the conductive component 7.

[0098] For example, referring to Figures 1 and 6, the shaft wall 123 of the stator spindle 12 encloses a wiring space 126, which extends axially along the stator spindle 12. A conductive component 7 extends axially along the stator spindle 12 and is disposed within the wiring space 126. One axial end of the conductive component 7 is connected to the winding assembly 13, and the other axial end of the conductive component 7 is connected to the motor controller. Here, the conductive component 7 is adapted to couple the motor controller to the winding assembly 13 to control the on / off state of the current in the winding assembly 13, thereby controlling the relative movement of the stator assembly 1 and the rotor assembly 2. It should be noted that the winding assembly 13 may include a three-phase coil.

[0099] In some embodiments of this disclosure, the shaft wall 123 of the stator spindle 12 itself forms a cooling water channel 124, and the shaft wall 123 of the stator spindle 12 encloses a wiring space 126, where the conductive component 7 is disposed. The cooling water channel 124 and the conductive component 7 are both located on the shaft wall 123 of the stator spindle 12, which improves the space utilization of the stator spindle 12, making the structure of the stator assembly 1 more compact and facilitating the miniaturization design of the linear motor 100. Furthermore, since the cooling water channel 124 is located inside the shaft wall 123 of the stator spindle 12, the shaft wall 123 of the stator spindle 12 has good sealing performance for the cooling water channel 124, thus improving the isolation effect between the conductive component 7 and the cooling water channel 124 and enhancing the reliability of the linear motor 100. In addition, the cooling water channel 124 can simultaneously exchange heat with the conductive component 7 and the winding assembly 13, thereby improving the heat dissipation efficiency and effect of the linear motor 100.

[0100] Some embodiments of this disclosure also propose a suspension system 200.

[0101] As shown in FIG8, a suspension system 200 according to some embodiments of the present disclosure includes a linear motor 100 according to the above embodiments.

[0102] According to some embodiments of the suspension system 200 of this disclosure, by setting the mover assembly 2 to contact the first buffer member 3 when it moves to the first limit position, the first buffer member 3 can limit the mover assembly 2 to avoid the mover assembly 2 from exceeding the first limit position and causing mechanical impact with the stator core 11. Furthermore, by setting the mover assembly 2 to be axially spaced from the upper end of the stator core 11 when it moves to the second limit position, mechanical impact between the mover assembly 2 and the stator core 11 at the second limit position can be avoided, thereby improving the design rationality of the linear motor 100 and improving the overall performance of the suspension system 200.

[0103] Referring to Figure 9, some embodiments of this disclosure further propose a vehicle.

[0104] A vehicle according to some embodiments of the present disclosure includes a suspension system 200 according to the above embodiments.

[0105] According to some embodiments of the present disclosure, the vehicle is configured such that when the mover assembly 2 moves to the first limit position, it contacts the first buffer member 3, so that the first buffer member 3 can limit the mover assembly 2 to avoid the mover assembly 2 exceeding the first limit position and causing mechanical impact with the stator core 11. Furthermore, by configuring the mover assembly 2 to be axially spaced from the upper end of the stator core 11 when it moves to the second limit position, mechanical impact between the mover assembly 2 and the stator core 11 at the second limit position can be avoided. This improves the design rationality of the linear motor 100, helps to improve the overall performance of the suspension system 200, thereby improving the overall performance of the vehicle and enhancing the vehicle's market competitiveness.

[0106] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0107] Although embodiments of this disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A linear motor (100) comprising: a stator assembly (1) comprising a stator core (11) ; a mover assembly (2) coupled with the stator assembly (1) so that the mover assembly (2) is reciprocally movable; and a first buffer (3) arranged between the stator core (11) and the mover assembly (2), the first buffer (3) being compressed when the mover assembly (2) moves to a first limit position in a first direction along an axial direction relative to the stator assembly (1), and the mover assembly (2) is axially spaced apart from the stator core (11) when the mover assembly (2) moves to a second limit position in a second direction along the axial direction relative to the stator assembly (1), the first direction and the second direction being opposite directions along the axial direction, the first limit position being an upper limit position, and the second limit position being a lower limit position.

2. The linear motor (100) of claim 1, wherein The first buffer (3) is arranged at a lower end of the stator core (11).

3. The linear motor (100) of claim 2, wherein, The stator assembly (1) further comprises a stator shaft (12), the stator core (11) is sleeved on the stator shaft (12), and the first buffer (3) is fixed to the stator shaft (12). 4.The linear motor (100) according to claim 3, further comprising a fixed connecting piece (4) fixed to the stator shaft (12), and the first buffer (3) is connected with the fixed connecting piece (4).

5. The linear motor (100) of claim 4, wherein, The fixed connecting piece (4) comprises a fixed portion (41) and a hooking portion (42) connected with each other, the fixed portion (41) is fixed to the stator shaft (12), the hooking portion (42) and a lower end surface of the fixed portion (41) define a hooking groove (43), and a part of the first buffer (3) is arranged in the hooking groove (43).

6. The linear motor (100) according to any one of claims 3-5, wherein, The mover assembly (2) comprises a housing (21) and a guide rod (22) arranged in the housing (21) and connected with the housing (21), the guide rod (22) extends into the stator shaft (12) and movably cooperates with the stator shaft (12), and the first buffer (3) is sleeved on the guide rod (22).

7. The linear motor (100) according to any one of claims 1-6, wherein At least one of an outer peripheral wall or an inner peripheral wall of the first buffer (3) is provided with a plurality of buffer grooves (31).

8. The linear motor (100) according to any one of claims 1-7, wherein, The stator assembly (1) further comprises a second buffer (14) arranged at an upper end of the stator core (11) ; The second buffer (14) is axially spaced apart from the mover assembly (2) at the second limit position. 9.The linear motor (100) according to claim 8, further comprising: a first inductor (5) arranged in the stator assembly (1) ; an inductive read head (6) arranged in the mover assembly (2), the inductive read head (6) and the first inductor (5) are coupled to detect a moving position of the mover assembly (2).

10. The linear motor (100) of claim 9, wherein, The stator assembly (1) further comprises a stator core shaft (12), the stator core shaft (12) comprises a shaft body (121) and an outer sleeve (122), the stator core (11) is arranged on the shaft body (121), the first induction element (5) is arranged on the outer peripheral wall of the shaft body (121), and the outer sleeve (122) is sleeved on the outer peripheral wall of the shaft body (121) to cover the first induction element (5).

11. The linear motor (100) of claim 10, wherein The lower end of the outer sleeve (122) is provided with a stop boss (1221), and the second buffer element (14) is arranged on the stop boss (1221).

12. The linear motor (100) according to any one of claims 1-11, wherein, The axial spacing between the mover assembly (2) and the stator core (11) is 1mm-6mm.

13. The linear motor (100) according to any one of claims 1-12, wherein, The stator assembly (1) further comprises: a stator core shaft (12), the stator core (11) is sleeved on the stator core shaft (12), the stator core shaft (12) comprises a shaft wall (123), the shaft wall (123) is provided with a cooling water channel (124) extending in the axial direction of the stator core shaft (12), and the shaft wall (123) is provided with a water channel opening (1243) in communication with a first end of the cooling water channel (124); and a winding assembly (13), the winding assembly (13) is arranged on the stator core (11), and the cooling water channel (124) comprises a first cooling water channel (1241) in heat exchange with the winding assembly (13).

14. The linear motor (100) of claim 13, wherein, The cooling water channel (124) further comprises a second cooling water channel (1242), the second cooling water channel (1242) and the first cooling water channel (1241) are sequentially arranged in the axial direction of the stator core shaft (12), and the water channel opening (1243) is in communication with the second cooling water channel (1242).

15. The linear motor (100) according to claim 14, further comprising an electrically conductive assembly (7), wherein, The shaft wall (123) surrounds a wiring space (126), the conductive assembly (7) is arranged in the wiring space (126), the conductive assembly (7) is coupled with the winding assembly (13) and a motor controller respectively, and the second cooling water channel (1242) is in heat exchange with the conductive assembly (7).

16. A suspension system (200) comprising the linear motor (100) according to any one of claims 1-15.

17. A vehicle (1000) comprising the suspension system (200) according to claim 16.

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