CN118137779A

CN118137779A - Linear motor, suspension system and vehicle

Info

Publication number: CN118137779A
Application number: CN202410550312.3A
Authority: CN
Inventors: 邓江起; 马冰青; 谭国栋
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2024-05-06
Filing date: 2024-05-06
Publication date: 2024-06-04

Abstract

The application discloses a linear motor, a suspension system and a vehicle. The linear motor comprises a primary component, a first bearing and a secondary component. The primary assembly comprises a mandrel provided with a hollow cavity. The first bearing is mounted in the hollow chamber. The secondary component comprises a guide rod, and one end of the guide rod extends into the hollow cavity and penetrates through the first bearing; in the axial direction of the mandrel, the secondary assembly can move between a first limit position and a second limit position relative to the primary assembly, and the guide rod extends into the hollow cavity to a greater extent when the secondary assembly is in the second limit position than when the secondary assembly is in the first limit position, and extends out of the first bearing when the secondary assembly is in the first limit position. In the linear motor provided by the embodiment of the application, the first bearing can play a role in guiding one end of the guide rod, which is positioned in the hollow cavity, so that the problem that the guide rod is inclined can be avoided, and the problems that the guide rod is scratched and impacts the first bearing can be avoided, and the first bearing is not easy to damage.

Description

Linear motor, suspension system and vehicle

Technical Field

The application relates to the technical field of linear motors, in particular to a linear motor, a suspension system and a vehicle.

Background

Generally, a linear motor includes a primary assembly, a secondary assembly, and a bearing, wherein the secondary assembly is disposed through the bearing, and the secondary assembly is movable relative to the primary assembly and the bearing. The provision of bearings may reduce friction between the primary and secondary components. However, the guide rods of the sub-assembly are prone to scratch and strike the bearings in the event of movement relative to the bearings, which can easily result in bearing damage.

Disclosure of Invention

The embodiment of the application provides a linear motor, a suspension system and a vehicle, which are at least used for solving the problems that a guide rod is easy to scratch and strike a bearing and the bearing is easy to damage.

The linear motor comprises a primary component, a first bearing and a secondary component. The primary assembly includes a mandrel provided with a hollow chamber. The first bearing is installed in the hollow cavity. The secondary assembly comprises a guide rod, and one end of the guide rod extends into the hollow cavity and penetrates through the first bearing; in the axial direction of the mandrel, the secondary assembly is movable relative to the primary assembly between a first limit position and a second limit position, the guide rod extending into the hollow chamber a greater length when the secondary assembly is in the second limit position than when the secondary assembly is in the first limit position, the guide rod extending out of the first bearing when the secondary assembly is in the first limit position.

In some embodiments, the end of the guide rod extending into the hollow chamber is provided with a chamfer.

In some embodiments, the secondary assembly further comprises a housing and an end cap, the housing is provided with a containing cavity, the mandrel is arranged in the containing cavity, and the other end of the guide rod is connected with the end cap.

In some embodiments, the first bearing is disposed at an end of the hollow chamber adjacent to the end cap in an axial direction of the mandrel.

In some embodiments, the linear motor further comprises a second bearing, one of the primary component and the secondary component is connected with the second bearing, and a limiting boss and a limiting piece are arranged on one of the primary component and the secondary component connected with the second bearing, and the limiting boss and the limiting piece jointly limit two axial ends of the second bearing.

In some embodiments, the secondary assembly further comprises a housing and an end cap, the housing having a receiving cavity, the other end of the guide rod being connected to the end cap; the shell is far away from one end of the end cover and is provided with an assembly hole, the mandrel penetrates through the assembly hole, the second bearing is positioned in the assembly hole and sleeved on the peripheral wall of the mandrel, and the shell is fixedly provided with the limiting boss and the limiting piece.

In certain embodiments, the secondary assembly further comprises a housing provided with a receiving cavity; the linear motor further comprises a first buffer piece, the first buffer piece is sleeved on the mandrel, when the secondary assembly is located at the first limit position, the first buffer piece is spaced from the inner wall of the shell, and when the secondary assembly is located at the second limit position, the first buffer piece is compressed by the inner wall of the shell.

In certain embodiments, the secondary assembly further comprises an end cap, the other end of the guide rod being connected to the end cap; the linear motor further comprises a second buffer piece, the second buffer piece is connected to one end, close to the end cover, of the mandrel and surrounds the guide rod, when the secondary assembly is located at the first limit position, the second buffer piece and the end cover are spaced, and when the secondary assembly is located at the second limit position, the second buffer piece is compressed by the end cover.

In some embodiments, the secondary assembly further comprises a housing and an end cap, the housing having a receiving cavity, the other end of the guide rod being connected to the end cap; the primary assembly further comprises an iron core, the iron core is located in the accommodating cavity, the iron core divides the accommodating cavity into a first cavity and a second cavity in the axial direction of the mandrel, a channel is formed in the first bearing, and the channel is used for increasing the communication air gap between the first cavity and the second cavity.

In some embodiments, the first cavity is further from the end cap than the second cavity, the first cavity is in communication with the hollow chamber, the first bearing is located between the outer peripheral wall of the guide rod and the inner wall of the hollow chamber, and the first second cavity is in communication with the hollow chamber through the channel.

In some embodiments, an opening is provided on the mandrel, the opening communicating the hollow chamber with the first cavity.

The suspension system according to the embodiment of the present application includes the linear motor according to the above embodiment.

The vehicle of the embodiment of the application includes the suspension system of the above embodiment.

In the linear motor, the suspension system and the vehicle according to the embodiments of the application, compared with the case that the secondary assembly is at the first limit position, the length of the guide rod extending into the hollow chamber is longer when the secondary assembly is at the second limit position, and one end of the guide rod, which is positioned in the hollow chamber, penetrates out of the first bearing when the secondary assembly is at the first limit position relative to the primary assembly. The first bearing can play a guiding role on one end of the guide rod, which is positioned in the hollow cavity, so that the problem that the guide rod inclines can be avoided, and the problems that the guide rod is scratched and impacts the first bearing can be avoided, and the first bearing is not easy to damage.

Additional aspects and advantages of the application 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 the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a linear motor according to certain embodiments of the present application;

FIG. 2 is a schematic structural view of a primary assembly in the linear motor of FIG. 1;

FIG. 3 is a partial schematic view of a sub-assembly in the linear motor of FIG. 1;

FIG. 4 is a schematic view of a portion of a guide bar in the linear motor of FIG. 3;

FIG. 5 is an enlarged schematic view of a V position in the linear motor of FIG. 1;

FIG. 6 is an enlarged schematic view of a VI location in the linear motor of FIG. 1;

FIG. 7 is a schematic view of a portion of the structure of a spindle in the linear motor of FIG. 1;

FIG. 8 is a split schematic of the mandrel of FIG. 7;

fig. 9 is a schematic structural view of a vehicle according to some embodiments of the present application.

Description of main reference numerals:

10000. A vehicle; 1000. a suspension system; 3000. a vehicle body; 5000. a wheel; 100. a linear motor; 10. a primary component; 11. a mandrel; 111. a hollow chamber; 113. a first shaft body; 1131. a mounting groove; 115. a cover plate; 117. a second shaft body; 13. an iron core; 131. a receiving groove; 133. a core block; 15. an opening; 17. an induction member; 18. a high voltage connector; 181. an electrical connection; 183. a female end of the connector; 19. a winding; 30. a first bearing; 31. a first end face; 33. a second end face; 35. a channel; 50. a secondary component; 51. a housing; 511. a receiving chamber; 512. a first end of the housing; 513. a first cavity; 514. a second end of the housing; 515. a second cavity; 517. a fitting hole; 518. a limit boss; 519. a limiting piece; 55. a guide rod; 551. a first end of the guide rod; 553. a second end of the guide rod; 56. an end cap; 57. a sensor readhead; 59. a magnetic member; 70. a second bearing; 80. a first buffer member; 90. and a second buffer member.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, 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", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Generally, a linear motor includes a primary assembly, a secondary assembly, and a bearing, wherein the secondary assembly is disposed through the bearing, and the secondary assembly is movable relative to the primary assembly and the bearing. The provision of bearings may reduce friction between the primary and secondary components. However, the guide rods of the sub-assembly are prone to scratch and strike the bearings in the event of movement relative to the bearings, which can easily result in bearing damage. To solve this problem, embodiments of the present application provide a linear motor 100 (shown in fig. 1), a suspension system 1000 (shown in fig. 9), and a vehicle 10000 (shown in fig. 9).

Referring to fig. 1 to 3, a linear motor 100 according to an embodiment of the present application includes a primary assembly 10, a first bearing 30, and a secondary assembly 50. The primary assembly 10 comprises a mandrel 11, the mandrel 11 being provided with a hollow chamber 111. The first bearing 30 is mounted within the hollow chamber 111. The sub-assembly 50 comprises a guide rod 55, one end of the guide rod 55 extending into the hollow chamber 111 and cooperating with the first bearing 30;

In the axial direction X of the spindle 11, the secondary assembly 50 is movable relative to the primary assembly 10 between a first extreme position (bottom dead center) and a second extreme position (top dead center) in which the guide bar 55 extends into the hollow chamber 111 longer than when the secondary assembly 50 is in the first extreme position (bottom dead center), in which the guide bar 55 extends out of the first bearing 30.

Specifically, in the linear motor 100 according to the embodiment of the present application, the secondary assembly 50 and the primary assembly 10 are relatively movable in the axial direction X of the spindle 11. In one embodiment, the secondary assembly 50 is movable relative to the primary assembly 10 along the axial direction X of the mandrel 11. In another embodiment, the primary assembly is movable relative to the 10 secondary assembly 50 along the axial direction X of the mandrel 11. The secondary assembly 50 of the present embodiment is movable relative to the primary assembly 10 along the axial direction X of the mandrel 11.

Referring to fig. 1 to 3, the hollow chamber 111 of the mandrel 11 is used for the guide rod 55 to extend into. The guide bar 55 is movable in the hollow chamber 111 with the secondary assembly 50 being moved relative to the primary assembly 10 in the axial direction X of the spindle 11. The hollow chamber 111 can provide a movable space for movement of the guide rod 55, thereby facilitating a miniaturized design of the linear motor 100. Also, in the case where the guide rod 55 moves in the hollow chamber 111, the spindle 11 can play a role of guiding the guide rod 55, that is, it can be ensured that the secondary assembly 50 can move in the axial direction of the spindle 11 relative to the primary assembly 10, and movement of the secondary assembly 50 in a direction (for example, a radial direction of the spindle 11, etc.) other than the axial direction X of the spindle 11 relative to the primary assembly 10 is avoided, so that stability of the movement of the secondary assembly 50 relative to the primary assembly 10 can be ensured.

The first bearing 30 includes a first end surface 31 and a second end surface 33 opposite to each other in the axial direction X of the spindle 11, the first end surface 31 being an upper end surface, and the second end surface 33 being a lower end surface. The end surface of the guide rod 55 located in the hollow chamber 111 protrudes from the first end surface 31 of the first bearing 30 when the sub-assembly 50 is in the first extreme position.

The first bearing 30 may be fixedly mounted within the hollow chamber 111. The first bearing 30 may include a bearing outer race fixedly connected to the inner wall of the hollow chamber 111 and a bearing inner race capable of moving relative to the bearing outer race. One end of the guide rod 55 is inserted through the bearing inner ring of the first bearing 30, and the bearing inner ring is matched with the peripheral wall of the guide rod 55. The first bearing 30 can reduce the friction force between the mandrel 11 and the guide rod 55, and avoid overlarge friction force between the mandrel 11 and the guide rod 55 caused by direct contact of the mandrel 11 and the guide rod 55, so that abrasion of the mandrel 11 and the guide rod 55 can be reduced, and the service lives of the mandrel 11 and the guide rod 55 are prolonged. In the axial direction X of the spindle 11, the first end surface 31 of the first bearing 30 is an upper end surface, and the second end surface 33 is a lower end surface.

In some embodiments, the first bearing 30 may be integrally formed, which facilitates manufacturing the first bearing 30, thereby facilitating reduction of production cost. For example, the first bearing 30 may be formed by powder metallurgy sintering and pressing, and the first bearing 30 is provided with air holes, grease is filled into the air holes by high pressure, and lubrication between the mutual movement of the primary component 10 and the secondary component 50 can be realized by the grease, so that the mutual movement of the primary component 10 and the secondary component 50 is smoother, and friction is effectively reduced. For example, the grease may be a lubricating oil or grease.

Referring to fig. 1 to 3, the guide rod 55 includes a second end 553 opposite to the first end 551, the first end 551 of the guide rod 55 is an upper end, and the second end 553 of the guide rod 55 is a lower end. The first end 551 of the guide bar 55 extends into the hollow chamber 111. The guide rod 55 extends into the hollow chamber 111 to engage the spindle 11.

The first limit position refers to: in the axial direction X of the spindle 11, the secondary assembly 50 is at its lowest position when it is moved downward (in the direction from the first end 512 of the housing 51 to the second end 514 of the housing 51) relative to the primary assembly 10. In other words, after the secondary assembly 50 reaches the first limit position, the secondary assembly 50 cannot move further downward (the direction from the first end 512 of the housing 51 to the second end 514 of the housing 51) with respect to the primary assembly 10 in the axial direction X of the spindle 11. The second limit position refers to: in the axial direction X of the spindle 11, the secondary assembly 50 is at its lowest position when it is moved upward (in the direction from the second end 514 of the housing 51 to the first end 512 of the housing 51) relative to the primary assembly 10. In other words, after the secondary assembly 50 reaches the second limit position, the secondary assembly 50 cannot move further upward (the direction from the second end 514 of the housing 51 to the first end 512 of the housing 51) relative to the primary assembly 10 in the axial direction X of the spindle 11. The length L1 of the guide bar 55 extending into the hollow chamber 111 with the secondary assembly 50 in the first extreme position is smaller than the length L2 of the guide bar 55 extending into the hollow chamber 111 with the secondary assembly 50 in the second extreme position, i.e. L1< L2.

During operation of the linear motor 100, the secondary assembly 50 is movable relative to the primary assembly 10 between a first limit position and a second limit position. With the sub-assembly 50 in the first extreme position, the first end 551 of the guide bar 55 is higher than the first end face 31 of the first bearing 30, i.e. the first end 551 of the guide bar 55 protrudes by a height H >0mm relative to the first end face 31 of the first bearing 30. At this time, the inner bearing ring of the first bearing 30 can better guide the guide rod 55, so that the guide rod 55 can move along the axial direction X of the mandrel 11, thereby avoiding the problems of scratching and striking the first bearing 30 by the guide rod 55, and the first bearing 30 is not easy to damage, and the service life of the first bearing 30 can be longer. In the case where the first end 551 of the guide bar 55 is lower than the first end face 31 of the first bearing 30, i.e., the first end 551 of the guide bar 55 protrudes by a height H < 0mm with respect to the first end face 31 of the first bearing 30, when the sub-assembly 50 is in the first limit position, the guide portion 555 of the guide bar 55 may be inclined, so that the guide portion 555 may scratch or even strike the inner race of the first bearing 30, which may easily cause damage to the first bearing 30.

In the linear motor 100 according to the embodiment of the present application, the length of the guide rod 55 extending into the hollow chamber 111 is longer when the secondary assembly 50 is in the second limit position than when the secondary assembly 50 is in the first limit position, and the guide rod 55 passes out of the first bearing 30 when the secondary assembly 50 is in the first limit position with respect to the primary assembly 10. The first bearing 30 can play a guiding role on one end of the guide rod 55, which is positioned in the hollow cavity 111, so that the problem that the guide rod 55 inclines can be avoided, and the problems that the guide rod 55 is scratched and impacts the first bearing 30 can be avoided, and the first bearing 30 is not easy to damage.

The linear motor 100 is further described below with reference to the accompanying drawings.

In some embodiments, the sub-assembly 50 further comprises a housing 51 and an end cap 56, the housing 51 being provided with a receiving cavity 511, the spindle 11 being disposed within the receiving cavity 511, the second end 553 of the guide rod 55 being connected to the end cap 56.

The housing 51 is a structure for mounting and protecting other components, and the housing 51 of the present application is used for mounting the spindle 11, the guide bar 55, and other components of the linear motor 100 therein. In the axial direction X of the mandrel 11, the housing 51 includes opposite first and second ends 512, 514, the first end 512 of the housing 51 being an upper end and the second end 514 of the housing 51 being a lower end. The spindle 11 is mounted within the receiving cavity 511 and extends at least partially from the first end 512 of the housing 51.

The guide bar 55 and the end cap 56 are detachably or non-detachably connected. The end cap 56 is adapted to be coupled to the lower yoke 300 of the suspension system 1000. The end cap 56 is removably coupled to the lower yoke 300 of the suspension system 1000, wherein the removable coupling may be, but is not limited to, a threaded connection, a screw connection, a snap-fit connection, etc., and the end cap 56 of the present application is coupled to the lower yoke 300 of the suspension system 1000 by a screw connection. The lower yoke 300 of the suspension system 1000 is removably coupled to the second end 514 of the housing 51, wherein the removable coupling may be, but is not limited to, a threaded connection, a screw connection, a snap connection, or the like. In the case of the secondary assembly 50 moving relative to the primary assembly 10, the guide rod 55 can move within the hollow chamber 111 such that the guide rod 55 can move together with the lower fork arm 300 of the suspension system 1000 via the end cap 56 and the lower fork arm 300 of the suspension system 1000 can move together with the housing 51.

Referring to fig. 1, 3,4 and 5, in some embodiments, the end of the first end 551 of the guide rod 55 is chamfered.

In the process of installing the primary assembly 10, the secondary assembly 50 and the first bearing 30, the first bearing 30 is installed in the hollow chamber 111 of the primary assembly 10, and then the guide rod 55 of the secondary assembly 50 passes through the first bearing 30 along the second end face 33 of the first bearing 30 toward the first end face 31 and enters the hollow chamber 111. In the case where the end of the first end 551 of the guide bar 55 is not provided with a chamfer, since the guide bar 55 is of a cylindrical structure, there may be sharp corners at the periphery of the end of the guide bar 55. In the case where the guide rod 55 is threaded through the first bearing 30 in the direction of the second end face 33 of the first bearing 30 toward the first end face 31, the sharp corners of the end of the guide rod 55 easily scratch the inner race of the first bearing 30, which may cause a problem in that the first bearing 30 is damaged. Under the condition that the end part of the first end 551 of the guide rod 55 is provided with a chamfer, when the guide rod 55 passes through the first bearing 30 along the second end face 33 of the first bearing 30 towards the first end face 31, the end part of the guide rod 55 is not easy to scratch the inner ring of the first bearing 30, the first bearing 30 is not easy to damage, and a better protection effect can be achieved on the first bearing 30.

In one embodiment, the end of the guide rod 55 that extends into the hollow chamber 111 is rounded. At this time, the guide rod 55 is not easy to scratch the inner ring of the first bearing 30 when penetrating the first bearing 30, and the guide rod 55 has better aesthetic property. In another embodiment, the end of the guide rod 55 extending into the hollow chamber 111 is provided with a right angle. At this time, the guide rod 55 is not easy to scratch the inner ring of the first bearing 30 when penetrating the first bearing 30, and the guide rod 55 is easy to process.

The present first bearing is usually arranged at the upper end of the housing, and in the case that the secondary assembly moves to the first limit position relative to the primary assembly, and the upper end of the guide rod needs to be higher than the upper end surface of the first bearing, the length of the guide rod needs to be longer. Under the condition that the length of the guide rod is overlong, on one hand, the machining precision of the guide rod can be affected, on the other hand, the guide rod is completely positioned by the upper end, when the guide rod moves to the lowest end, the guide rod and the primary component are easy to collide together, the guide rod can be worn, and the integral structure of the linear motor is invalid.

Referring to fig. 1 and 2, in the embodiment of the application, in the axial direction X of the mandrel 11, the first bearing 30 is disposed at an end of the hollow chamber 111 near the end cap 56. Wherein, in case the secondary assembly 50 moves to the first limit position with respect to the primary assembly 10, and the first end 551 of the guide bar 55 is higher than the first end surface 31 of the first bearing 30, the length of the guide bar 55 may be shorter. Under the condition that the length of the guide rod 55 is shorter, on one hand, the material cost of the guide rod 55 can be saved, on the other hand, the machining precision and the strength of the guide rod 55 can be guaranteed, the overall structure of the linear motor 100 is more reasonable, the guide rod 55 is not easy to collide with the primary assembly 10 in the moving process, and the linear motor 100 is not easy to fail.

Referring to fig. 1 and 5, in some embodiments, the primary assembly 10 further includes an iron core 13, where the iron core 13 is located in the accommodating cavity 511, and the iron core 13 divides the accommodating cavity 511 into a first cavity 513 and a second cavity 515 in an axial direction X of the mandrel 11, and the first bearing 30 is provided with a channel 35, where the channel 35 is used to increase a communication air gap between the first cavity 513 and the second cavity 515.

Wherein, a first cavity 513 is formed between an end of the core 13 away from the end cover 56 and the first end 512 of the housing 51, an end of the core 13 close to the end cover 56, the second end 514 of the housing 51 and the end cover 56 together form a second cavity 515, the first cavity 513 is close to the first end 512 of the housing 51, and the second cavity 515 is close to the second end 514 of the housing 51. The primary assembly 10 and the secondary assembly 50 have an air gap therebetween to facilitate relative movement of the primary assembly 10 and the secondary assembly 50, communication between the first cavity 513 and the second cavity 515 is achieved through the air gap, and vibration, noise, etc. problems can be reduced by reducing the air gap between the primary assembly 10 and the secondary assembly 50. However, the inventor of the present application has found that, in the related art, when the secondary assembly 50 moves along the axial direction X of the mandrel 11, the pressures of the first cavity 513 and the second cavity 515 change, and the air gap between the primary assembly 10 and the mover assembly is small, so that the flow area between the first cavity 513 and the second cavity 515 is small, thereby increasing the resistance of the primary assembly 10 and the mover assembly to each other, increasing the energy consumption of the linear motor 100, causing heat generation of the linear motor 100, easily damaging the linear motor 100, and reducing the service life.

Therefore, in order to solve the problem of large mutual movement resistance of the primary assembly 10 and the secondary assembly 50, the first bearing 30 of the present application is provided with the channel 35, so that the communication air gap between the first cavity 513 and the second cavity 515 can be increased, so that the air flow can flow through the air gap between the primary assembly 10 and the secondary assembly 50, and the air flow can flow between the first cavity 513 and the second cavity 515 through the channel 35, so that the flow area between the first cavity 513 and the second cavity 515 is increased, the pressure difference between the first cavity 513 and the second cavity 515 is beneficial to be adjusted, the air pressure is effectively improved, the problem that the primary assembly 10 and the secondary assembly 50 are influenced by the pressure difference to generate fluctuation can be reduced or avoided, the resistance of the primary assembly 10 and the secondary assembly 50 to move mutually can be reduced, for example, the air resistance caused by the volume change of the first cavity 513 and the second cavity 515 when the guide rod 55 moves is reduced, so that the primary assembly 10 and the secondary assembly 50 move mutually more smoothly, and the service life of the linear motor 100 is beneficial to be prolonged. Meanwhile, the processing of the channel 35 on the first bearing 30 is more convenient, so that the processing is simple, and the production cost is reduced.

Referring to fig. 5, in the embodiment of the present invention, the specific shape of the channel 35 may be set according to practical situations. For example, the channel 35 may be formed as a square groove, a triangular groove, or the like. For example, in some embodiments, the channel 35 may be an arc-shaped groove, which can avoid stress concentration on the first bearing 30, and is beneficial to improving the structural strength of the first bearing 30.

In some embodiments of the present invention, the plurality of channels 35 are unevenly distributed along the circumferential direction of the first bearing 30, that is, the spacing between any two adjacent channels 35 in the plurality of channels 35 is different along the circumferential direction of the channels 35, so that problems such as noise, vibration and harshness (Noise, vibration, harshness, NVH) can be effectively reduced, and the required use requirements can be satisfied.

In the linear motor 100 according to the embodiment of the present application, the first cavity 513 and the second cavity 515 are respectively disposed between the opposite ends of the core 13 of the primary assembly 10 and the housing 51, the first bearing 30 is disposed between the spindle 11 and the guide rod 55, the first bearing 30 is provided with the channel 35 to increase the communication air gap between the first cavity 513 and the second cavity 515, so that the air flow can flow through the air gap between the primary assembly 10 and the secondary assembly 50, and meanwhile, the air flow can be realized between the first cavity 513 and the second cavity 515 through the channel 35, so that the flow area between the first cavity 513 and the second cavity 515 is increased, the pressure difference between the first cavity 513 and the second cavity 515 is conveniently adjusted, the primary assembly 10 and the secondary assembly 50 can move smoothly with each other, the service life of the linear motor 100 is facilitated to be prolonged, and the channel 35 is more convenient to process on the first bearing 30, and the processing is simple, and the production cost is facilitated to be reduced.

Referring to fig. 1 and 5, further, in some embodiments, the first cavity 513 is in communication with the hollow chamber 111, the first bearing 30 is located between the outer peripheral wall of the guide rod 55 and the inner wall of the hollow chamber 111, and the second cavity 515 is in communication with the hollow chamber 111 through the channel 35.

Specifically, the first bearing 30 is disposed between the outer peripheral wall of the guide rod 55 and the inner wall of the hollow chamber 111, so that when the guide rod 55 slides in the hollow chamber 111, friction between the guide rod 55 and the inner wall of the hollow chamber 111 can be reduced by the first bearing 30, which is beneficial to reducing the abrasion degree and prolonging the service life of the linear motor 100.

The hollow chamber 111 is communicated with the second cavity 515, the second cavity 515 is communicated with the hollow chamber 111 through the channel 35, namely, the air flow of the second cavity 515 can flow to the hollow chamber 111 through the channel 35 and flow to the first cavity 513 through the hollow chamber 111, or the air flow of the first cavity 513 can flow to the second cavity 515 through the channel 35 from the hollow chamber 111 so as to enable the first cavity 513 to be communicated with the second cavity 515, thus the required communication requirement is met, the air flow can flow from the radial inner side and the radial outer side of the primary assembly 10, the flow area is increased, the resistance of the primary assembly 10 and the secondary assembly 50 to mutually move can be reduced, the primary assembly 10 and the secondary assembly 50 mutually move more smoothly, and the linear motor 100 is convenient to process and manufacture, and the production cost of the linear motor 100 is reduced.

In some embodiments, to meet the coaxiality requirement of the linear motor 100, the gap between the guide rod 55 and the first bearing 30 is made smaller. When the guide rod 55 is matched with the first bearing 30, due to mutual friction, for example, the bearing capacity is large or the movement speed of the secondary assembly 50 in the axial direction of the primary assembly 10 is large, the temperature of the guide rod 55 and the first bearing 30 is gradually increased, so that the first bearing 30 and the guide rod 55 are heated and expanded, and the guide rod 55 is easy to be in interference fit with the first bearing 30. Therefore, the first bearing 30 is provided with the channel 35, so that the air flows of the first cavity 513 and the hollow chamber 111 can mutually circulate through the channel 35, the problems of blocking and the like are avoided, and the primary assembly 10 and the secondary assembly 50 can mutually move more smoothly.

Referring to fig. 1 and 5, in some embodiments, the mandrel 11 is provided with an opening 15, and the opening 15 communicates between the hollow chamber 111 and the first cavity 513. The first cavity 513 is communicated with the hollow cavity 111 through the opening 15, and the hollow cavity 111 is communicated with the second cavity through the channel 35, so that the first cavity 513 is communicated with the second cavity 515, the resistance of the primary assembly 10 and the secondary assembly 50 to mutual movement can be reduced, the primary assembly 10 and the secondary assembly 50 can move more smoothly with each other, the processing and the manufacturing are facilitated, and the production cost of the linear motor 100 is reduced.

Referring to fig. 1 and 6, in some embodiments, the linear motor 100 further includes a second bearing 70, one of the primary assembly 10 and the secondary assembly 50 is fixedly connected to the second bearing 70 and provided with a limiting boss 518 and a limiting member 519, and the limiting boss 518 and the limiting member 519 jointly limit two ends of the second bearing 70 in the axial direction.

Wherein in certain embodiments, the second bearing 70 may comprise a bearing outer race and a bearing inner race, the bearing inner race being capable of movement relative to the bearing inner race. The bearing outer ring is fixedly arranged on the shell 51, and the bearing inner ring is matched with the outer peripheral wall of the mandrel 11. The arrangement of the second bearing 70 can reduce the friction between the housing 51 and the mandrel 11, and avoid the friction between the housing 51 and the mandrel 11 caused by direct contact between the housing 51 and the mandrel 11, thereby reducing wear of the mandrel 11 and prolonging the service life of the mandrel 11.

The limiting piece 519 and the limiting boss 518 are used for limiting the two ends of the second bearing 70 in the axial direction, so that the connection stability of the second bearing 70 on the secondary assembly 50 or the primary assembly 10 can be enhanced, and the axial space of the linear motor 100 can be fully utilized, so that the limiting piece 519, the limiting boss 518 and the second bearing 70 are compact in integral structure.

Wherein, one of the secondary assembly 50 and the primary assembly 10 is fixedly connected with the second bearing 70, and one of the secondary assembly 50 and the primary assembly 10 fixedly connected with the second bearing 70 is provided with a limiting boss 518 and a limiting piece 519, which may include the following cases: for example, the secondary assembly 50 is fixedly connected with the second bearing 70, and a limiting boss 518 and a limiting piece 519 are arranged on the secondary assembly 50; for another example, the primary assembly 10 may be fixedly connected to the second bearing 70, and the secondary assembly 50 may be provided with a limiting boss 518 and a limiting member 519.

For example, when the linear motor 100 is in operation, vibration may be generated, and through the cooperation between the limiting piece 519 and the limiting boss 518, the situation that the second bearing 70 moves or falls off due to vibration can be avoided, so that the stability of the second bearing 70 in the axial direction can be improved, and the overall stability of the linear motor 100 is improved.

According to the linear motor 100 of the embodiment of the application, the limiting bosses 518 and the limiting pieces 519 limit the two axial ends of the second bearing 70 together, so that the possibility that the second bearing 70 moves or falls off at the two axial ends can be reduced, the stability of the connection of the second bearing 70 on the secondary assembly 50 or the primary assembly 10 is enhanced, and the overall stability of the linear motor 100 can be improved; further, the space in the axial direction of the linear motor 100 can be fully utilized, and the entire structure of the stopper 519, the stopper boss 518, and the second bearing 70 can be made compact.

Referring to fig. 1 and 6, in particular, in some embodiments, a first end 512 of the housing 51 is formed with a mounting hole 517, the mandrel 11 is disposed through the mounting hole 517, the second bearing 70 is disposed in the mounting hole 517 and sleeved on the outer peripheral wall of the mandrel 11, and a limiting boss 518 and a limiting member 519 are fixed on the housing 51.

The mounting holes 517 may facilitate installation of the primary assembly 10. The second bearing 70 is sleeved on the periphery of the mandrel 11, and the second bearing 70 is mounted on the limiting boss 518 on the inner wall of the assembly hole 517, so that the second bearing 70 is matched with the mandrel 11 to support the mandrel 11, the stability of the mandrel 11 can be enhanced, and vibration generated by the mandrel 11 during operation of the linear motor 100 is reduced.

Alternatively, the fixing of the limit boss 518 to the housing 51 may include the following: for example, the limiting boss 518 is welded with the shell 51, so that the connecting mode between the limiting boss 518 and the shell 51 is simple and has high stability; for another example, the limiting boss 518 is integrally formed on the housing 51, and the integral forming of the limiting boss 518 and the housing 51 can enhance the overall structural strength of the housing 51, and the assembling process of the limiting boss 518 and the housing 51 can be omitted.

The limiting boss 518 extends along the circumferential direction of the first bearing 30, so that the contact area between the limiting boss 518 and the first bearing 30 can be increased, the limiting effect of the limiting boss 518 on the first bearing 30 can be enhanced, the connection stability of the first bearing 30 on the shell 51 is further enhanced, and the first bearing 30 is prevented from moving or falling off at one axial end far away from the limiting piece 519.

According to some embodiments of the present application, the limiting member 519 is annular and extends along the circumferential direction of the second bearing 70, so that the contact area between the limiting member 519 and the second bearing 70 can be increased, and thus the limiting effect of the limiting member 519 on the axial side of the second bearing 70 away from the limiting boss 518 can be improved, the connection stability of the second bearing 70 on the housing 51 is further enhanced, and the first bearing 30 is prevented from moving or falling off at the axial end away from the limiting boss 518.

According to some embodiments of the present application, the limiting member 519 may be a circlip, a metal ring, or a snap spring, so that the limiting member 519 has high structural strength and wear resistance, and can effectively block the movement of the first bearing 30 in the axial direction, which is beneficial to prolonging the service life of the linear motor 100. According to some embodiments of the present application, the limiting member 519 is interference-fitted in the fitting hole 517, so that the connection manner between the limiting member 519 and the housing 51 is simple and has strong stability, and the possibility that the limiting member 519 is loosened or falls off due to vibration or external impact of the linear motor 100 can be reduced.

Referring to fig. 1, in some embodiments, the linear motor 100 further includes a first buffer member 80, where the first buffer member 80 is sleeved on the mandrel 11, and when the secondary assembly 50 is in the first limit position, the first buffer member 80 is spaced from the inner wall of the housing 51, and when the secondary assembly 50 is in the second limit position, the first buffer member 80 is compressed by the inner wall of the housing 51.

The first buffer 80 is sleeved on one end of the mandrel 11 away from the end cover 56. During movement of the sub-assembly 50 from the first extreme position in the direction of the second extreme position, the spindle 11 gradually approaches the first end 512 of the housing 51. With the sub-assembly 50 in the second extreme position, the spindle 11 abuts the first end 512 of the housing 51. The first buffer 80 is used for buffering collision between the mandrel 11 and the first end 512 of the housing 51, so as to avoid abrasion of the mandrel 11 and the first end 512 of the housing 51.

Referring to fig. 1, in some embodiments, the linear motor 100 further includes a second buffer member 90, where the second buffer member 90 is connected to an end of the spindle 11 near the end cap 56 and surrounds the guide rod 55, and where the second buffer member 90 is spaced from the end cap 56 when the secondary assembly 50 is in the first limit position, and where the second buffer member 90 is compressed by the end cap 56 when the secondary assembly 50 is in the second limit position.

During movement of the sub-assembly 50 from the first extreme position in the direction of the second extreme position, the end cap 56 gradually approaches the end of the spindle 11. With the sub-assembly 50 in the second extreme position, the end cap 56 abuts the end of the spindle 11. The second buffer 90 is used for buffering collision between the end of the mandrel 11 and the end cover 56, so as to avoid abrasion of the mandrel 11 and the end cover 56. It should be noted that, in some embodiments, the material of the second buffer member 90 may include, but is not limited to, at least one of rubber, silicone, plastic, and the like.

Referring to fig. 7 and 8, in some embodiments, the mandrel 11 includes a first shaft body 113 and a cover plate 115, wherein a mounting groove 1131 is formed on a peripheral wall of the first shaft body 113, and the cover plate 115 is connected to the first shaft body 113 to block the mounting groove 1131 from the peripheral surface; the primary assembly 10 further includes a sensing element 17, the sensing element 17 being disposed within the mounting channel 1131, and the cover 115 covering the sensing element 17.

Specifically, in some embodiments, the mounting groove 1131 is recessed from the outside of the peripheral wall of the first shaft body 113 toward the central axis of the first shaft body 113, and the sensing piece 17 is disposed in the mounting groove 1131. The installation groove 1131 is arranged to facilitate the installation and positioning of the sensing element 17 on the mandrel 11, so that the assembly efficiency of the primary assembly 10 is improved; on the other hand, the dimensions of the mandrel 11 and the sensing member 17 in the radial direction of the mandrel 11 can be reduced, thereby contributing to the downsizing of the primary assembly 10.

In certain embodiments, sensing element 17 may include, but is not limited to, an electromagnetic sensor, a photoelectric sensor, an ultrasonic sensor, or the like. In the embodiment of the present application, the sensing element 17 is only exemplified as a magnetic grid.

In some embodiments, the first shaft body 113 and the cover plate 115 may be coupled together using a detachable connection. Removable attachment means include, but are not limited to, threaded or snap-fit connections, and the like. In other embodiments, the first shaft body 113 and the cover plate 115 may be coupled together using a non-removable connection. Non-detachable attachment means include, but are not limited to, welding or adhesive bonding, etc. Illustratively, the first shaft body 113 and the cover plate 115 may be combined together by adopting a welded connection manner, so that the combination strength between the first shaft body 113 and the cover plate 115 can be improved, and the separation between the first shaft body 113 and the cover plate 115 during the operation of the linear motor 100 is prevented, thereby improving the stability and reliability of the operation of the linear motor 100. Wherein the welding includes, but is not limited to, ultrasonic welding, molecular diffusion welding, laser welding, and the like.

In the primary assembly 10 according to the embodiment of the application, the mounting groove 1131 is formed in the peripheral wall of the first shaft body 113, the cover plate 115 is connected with the first shaft body 113 to seal the mounting groove 1131 from the peripheral surface, the sensing element 17 is arranged in the mounting groove 1131, and the cover plate 115 covers the sensing element 17, so that foreign matters such as water or dust outside can be prevented from contacting the sensing element 17, the possibility of damage and failure of the sensing element 17 is reduced, and the stability and reliability of the operation of the linear motor 100 are improved.

Referring to fig. 1,2, 7 and 8, further, in some embodiments, the mandrel 11 further includes a second shaft body 117, and the first shaft body 113 is connected to the second shaft body 117 in the axial direction X of the mandrel 11. In some embodiments, the first shaft body 113 and the second shaft body 117 are integrally formed, i.e., the first shaft body 113 and the second shaft body 117 are a unitary structure. In other embodiments, the first shaft body 113 and the second shaft body 117 are separately provided, that is, the first shaft body 113 and the second shaft body 117 have two different structures, and the first shaft body 113 and the second shaft body 117 may be combined together in a detachable connection manner or a non-detachable connection manner. Detachable connection means include, but are not limited to, threaded connection or snap connection, etc.; non-detachable attachment means include, but are not limited to, welding or adhesive bonding, etc.

Referring to fig. 1 and 2, in some embodiments, the primary assembly 10 further includes a winding 19. The core 13 is fitted around the outer side of the peripheral wall of the second shaft body 117, and the core 13 is provided with a plurality of accommodation grooves 131 spaced apart in the axial direction X of the mandrel 11. The winding 19 is disposed in the receiving groove 131.

Specifically, in some embodiments, when the winding 19 is energized, the winding 19 can generate a magnetic field, and the iron core 13 can concentrate the magnetic field generated by the winding 19, so that the magnetic field generated by the winding 19 can act on the secondary assembly 50 as much as possible, thereby ensuring the stability and reliability of the relative movement of the primary assembly 10 and the secondary assembly 50.

In some embodiments, the core 13 and the second shaft body 117 may be detachably coupled together. Removable attachment means include, but are not limited to, threaded or snap-fit connections, and the like. In other embodiments, the core 13 and the second shaft body 117 may be coupled together by a non-detachable connection. Non-detachable attachment means include, but are not limited to, welding or adhesive bonding, etc.

Referring to fig. 1 and 2, in some embodiments, the core 13 includes a plurality of core blocks 133, and the plurality of core blocks 133 are stacked in an axial direction of the mandrel 11, and two adjacent core blocks 133 together form the accommodating groove 131.

Specifically, in some embodiments, the core blocks 133 may include a main body portion and a protrusion portion, the main body portion may be connected with the second shaft body 117, the protrusion portion protrudes from one end of the main body portion toward a direction away from the second shaft body 117, and thus, in a case where a plurality of core blocks 133 are stacked, two adjacent core blocks 133 may together form the accommodating groove 131.

Referring to fig. 1, further, in some embodiments, the primary assembly 10 further includes a high voltage connector 18, the high voltage connector 18 being received within the hollow chamber 111 and electrically connected to the windings 19 via electrical connectors 181. The high-voltage connector 18 is arranged in the hollow cavity 111, so that the possibility of mechanical damage to the high-voltage connector 18 can be reduced, the insulativity of the high-voltage connector 18 is improved, and the normal operation of the primary assembly 10 is ensured; on the other hand, the space occupied by the high-voltage connector 18 and the mandrel 11 can be reduced, the structural compactness of the primary assembly 10 is improved, and the miniaturization of the primary assembly 10 and the linear motor 100 is facilitated.

Referring to fig. 1, in particular, in some embodiments, the high voltage connector 18 further includes a connector female end 183, the connector female end 183 being located outside the hollow chamber 111, the connector female end 183 being capable of transmitting electrical energy to the high voltage connector 18 and transmitting electrical energy to the winding 19 through the three-phase terminals of the high voltage connector 18 such that the winding 19 generates a magnetic field.

Referring to fig. 1 and 6, in some embodiments, the secondary assembly 50 includes a sensor readhead 57, the sensor readhead 57 cooperating with the sensing element 17 of the primary assembly 10 to detect a change in position between the secondary assembly 50 and the primary assembly 10.

Illustratively, in the case where the first sensing element 17 is a magnetic grating and the second sensing element 17 is a sensor reading head 57, the magnetic grating is opposite to the sensor reading head 57 with a spacing therebetween, and the sensor reading head 57 is capable of moving relative to the magnetic grating along the axial direction of the spindle 11, wherein during movement of the sensor reading head 57 relative to the magnetic grating, the sensor reading head 57 is capable of generating a corresponding signal in accordance with a change in the magnetic field of the magnetic grating, and detecting a change in position between the secondary assembly 50 and the primary assembly 10 in accordance with the signal.

Referring to fig. 1, in some embodiments, the sub-assembly 50 further includes a magnetic member 59, the magnetic member 59 being received in the receiving cavity 511, the magnetic member 59 being configured to cooperate with the winding 19 to enable movement of the housing 51 relative to the mandrel 11.

Specifically, in some embodiments, the magnetic member 59 is disposed on the inner wall of the housing 51, and the core 13 and the magnetic member 59 are accommodated in the accommodating cavity 511 and are opposite to the magnetic member 59. Wherein, when the winding 19 is supplied with current, the winding 19 can generate a magnetic field, and the magnetic field generated by the winding 19 can interact with the magnetic field generated by the magnetic member 59 to generate a force for driving the housing 51 to move relative to the mandrel 11, so that the secondary assembly 50 can move relative to the primary assembly 10 along the axial direction of the mandrel 11. It should be noted that, in some embodiments, the magnetic member 59 may be magnetic steel.

Referring to fig. 9, a suspension system 1000 according to an embodiment of the present application includes the linear motor 100 according to the above embodiment. It is to be understood that, since the suspension system 1000 in the present embodiment includes the linear motor 100 in the foregoing embodiment, the suspension system 1000 includes at least the same advantages as those of the linear motor 100, and will not be described herein.

In the suspension system 1000 of the embodiment of the present application, the length of the guide rod 55 extending into the hollow chamber 111 is longer when the secondary assembly 50 is in the second extreme position than when the secondary assembly 50 is in the first extreme position, and the guide rod 55 passes out of the first bearing 30 when the secondary assembly 50 is in the first extreme position relative to the primary assembly 10. The first bearing 30 can play a guiding role on one end of the guide rod 55, which is positioned in the hollow cavity 111, so that the problem that the guide rod 55 inclines can be avoided, and the problems that the guide rod 55 is scratched and impacts the first bearing 30 can be avoided, and the first bearing 30 is not easy to damage.

Referring to fig. 9, a vehicle 10000 according to an embodiment of the present application includes the suspension system 1000 of the above embodiment. The vehicles 10000 include, but are not limited to, passenger vehicles 10000 such as pure electric vehicles 10000 and hybrid vehicles 10000, or large-sized vehicles 10000 with less severe working conditions. It is to be understood that, since the vehicle 10000 in the present embodiment includes the suspension system 1000 in the above embodiment, the vehicle 10000 includes at least the same advantages as the suspension system 1000, and will not be described herein.

Specifically, in some embodiments, vehicle 10000 further includes a body 3000 and wheels 5000, and wheels 5000 are provided to wheels 5000 and are movable relative to body 3000. The suspension system 1000 further includes a suspension, the linear motor 100 is disposed on the suspension, and one end of the linear motor 100 is connected to the vehicle body 3000. In the case where the linear motor 100 is stably operated, the linear motor 100 can drive the wheel 5000 to move relative to the vehicle body 3000, and thus the position detecting member can determine the relative displacement between the vehicle body 3000 and the wheel 5000 according to the positional change between the primary assembly 10 and the secondary assembly 50.

In the vehicle 10000 of the embodiment of the present application, the guide bar 55 extends into the hollow chamber 111 longer when the secondary assembly 50 is in the second limit position than when the secondary assembly 50 is in the first limit position, and the guide bar 55 passes out of the first bearing 30 when the secondary assembly 50 is in the first limit position with respect to the primary assembly 10. The first bearing 30 can play a guiding role on one end of the guide rod 55, which is positioned in the hollow cavity 111, so that the problem that the guide rod 55 inclines can be avoided, and the problems that the guide rod 55 is scratched and impacts the first bearing 30 can be avoided, and the first bearing 30 is not easy to damage.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. Also, other implementations may be derived from the above-described embodiments, such that structural and logical substitutions and changes may be made without departing from the scope of this disclosure.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the patent. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A linear motor (100), characterized by comprising:

-a primary assembly (10), the primary assembly (10) comprising a mandrel (11), the mandrel (11) being provided with a hollow chamber (111);

-a first bearing (30), said first bearing (30) being mounted within said hollow chamber (111); and

-A secondary assembly (50), the secondary assembly (50) comprising a guide rod (55), one end of the guide rod (55) extending into the hollow chamber (111) and penetrating the first bearing (30);

In the axial direction of the spindle (11), the secondary assembly (50) is movable relative to the primary assembly (10) between a first extreme position and a second extreme position, the guide rod (55) extending into the hollow chamber (111) for a longer length when the secondary assembly (50) is in the second extreme position than when the secondary assembly (50) is in the first extreme position, the guide rod (55) extending out of the first bearing (30).

2. The linear motor (100) according to claim 1, wherein an end of the guide rod (55) extending into the hollow chamber (111) is provided with a chamfer.

3. The linear motor (100) according to claim 1, wherein the secondary assembly (50) further comprises a housing (51) and an end cover (56), the housing (51) is provided with a containing cavity (511), the mandrel (11) is disposed in the containing cavity (511), and the other end of the guide rod (55) is connected with the end cover (56).

4. A linear motor (100) according to claim 3, wherein the first bearing (30) is provided at an end of the hollow chamber (111) near the end cap (56) in the axial direction of the spindle (11).

5. The linear motor (100) of claim 1, wherein the linear motor (100) further comprises:

And the second bearing (70), one of the primary component (10) and the secondary component (50) is connected with the second bearing (70), one of the primary component (10) and the secondary component (50) connected with the second bearing (70) is provided with a limiting boss (518) and a limiting piece (519), and the limiting boss (518) and the limiting piece (519) limit the two axial ends of the second bearing (70) together.

6. The linear motor (100) according to claim 5, wherein the secondary assembly (50) further comprises a housing (51) and an end cap (56), the housing (51) being provided with a receiving cavity (511), the other end of the guide rod (55) being connected to the end cap (56); the shell (51) is far away from one end of the end cover (56) and is provided with an assembly hole (517), the mandrel (11) penetrates through the assembly hole (517), the second bearing (70) is located in the assembly hole (517) and sleeved on the peripheral wall of the mandrel (11), and the shell (51) is fixedly provided with a limiting boss (518) and is provided with a limiting piece (519).

7. The linear motor (100) according to claim 1, wherein the secondary assembly (50) further comprises a housing (51), the housing (51) being provided with a receiving cavity (511); the linear motor (100) further includes:

the first buffer piece (80), first buffer piece (80) cover is located on dabber (11), when sub-subassembly (50) are in first extreme position, first buffer piece (80) with the inner wall interval of casing (51), when sub-subassembly (50) are in second extreme position, first buffer piece (80) is compressed by the inner wall of casing (51).

8. The linear motor (100) of claim 1, wherein the secondary assembly (50) further comprises an end cap (56), the other end of the guide rod (55) being connected to the end cap (56); the linear motor (100) further includes:

a second bumper (90), said second bumper (90) being connected to an end of said mandrel (11) adjacent said end cap (56) and surrounding said guide bar (55), said second bumper (90) being spaced from said end cap (56) when said secondary assembly (50) is in said first extreme position, said second bumper (90) being compressed by said end cap (56) when said secondary assembly (50) is in said second extreme position.

9. The linear motor (100) according to claim 1, wherein the secondary assembly (50) further comprises a housing (51) and an end cap (56), the housing (51) being provided with a receiving cavity (511), the other end of the guide rod (55) being connected to the end cap (56); the primary assembly (10) further comprises an iron core (13), the iron core (13) is located in the accommodating cavity (511), the iron core (13) divides the accommodating cavity (511) into a first cavity (513) and a second cavity (515) in the axial direction of the mandrel (11), a channel (35) is formed in the first bearing (30), and the channel (35) is used for increasing a communication air gap between the first cavity (513) and the second cavity (515).

10. The linear motor (100) of claim 9, wherein the first cavity (513) is further from the end cap (56) than the second cavity (515), the first cavity (513) being in communication with the hollow chamber (111), the first bearing (30) being located between the outer peripheral wall of the guide rod (55) and the inner wall of the hollow chamber (111), the second cavity (515) being in communication with the hollow chamber (111) through the channel (35).

11. The linear motor (100) according to claim 10, wherein an opening (15) is provided on the spindle (11), the opening (15) communicating the hollow chamber (111) with the first cavity (513).

12. A suspension system (1000), comprising:

the linear motor (100) of any of claims 1-11.

13. A vehicle (10000), characterized by comprising:

the suspension system (1000) of claim 12.