Primary assembly for linear motor, linear motor, suspension system and vehicle
By designing cooling channels separated by flow dividers in the primary assembly of the linear motor, the heat is carried away by the flow of coolant, which solves the problem of motor temperature rise and improves the motor's lifespan and performance.
Patent Information
- Application Number
- CN202420018318.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-03
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-03
AI Technical Summary
When a motor is running, magnetic energy is converted into heat energy, causing the temperature to rise, which can damage the internal electrical components of the motor and affect its lifespan.
Design a primary component for a linear motor, comprising a channel arranged along the axial direction, with ribs inside the channel dividing it into first and second cooling channels. Coolant flows through these two channels to carry away heat from the iron core and reduce the temperature.
The flow of coolant effectively reduces the temperature inside the iron core and motor, thereby improving the motor's lifespan and performance.
Smart Images
Figure CN222356139U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, and in particular to a primary component for a linear motor, a linear motor, a suspension system and a vehicle. Background Art
[0002] When the motor is running, the stator and the mover move relative to each other under the action of the magnetic field. In the process of the mover converting magnetic energy into kinetic energy, part of the magnetic energy will be converted into heat energy, which can easily increase the temperature inside the motor, damage the conversion of the motor's magnetic energy into kinetic energy, and easily damage the electrical components inside the motor. Utility Model Content
[0003] The technical problem to be solved by the embodiments of the utility model is to provide a primary assembly for a linear motor, a linear motor, a suspension system and a vehicle with good cooling effect.
[0004] In a first aspect, the utility model provides a primary component for a linear motor, comprising an iron core having a channel arranged along an axial direction, a shunt rib being arranged in the channel, the shunt rib being arranged along an axial direction and dividing the channel into a first cooling channel and a second cooling channel, the first cooling channel and the second cooling channel being connected at the first end of the channel.
[0005] In combination with the first aspect, in a possible implementation, the first end of the channel is close to the axial first end of the iron core, the second end of the channel is arranged at the axial second end of the iron core, and the second end of the channel is provided with a liquid inlet and a liquid outlet.
[0006] In combination with the first aspect, in a possible implementation manner, a winding coil is provided on the outer periphery of the iron core along the axial direction.
[0007] In combination with the first aspect, in a possible implementation manner, the first end of the channel passes through the axial first end of the iron core, and the first end of the channel is provided with a sealing cover for closing the first end of the channel.
[0008] In combination with the first aspect, in a possible implementation manner, the inner wall of the first cooling channel is provided with a first heat dissipation fin, and the first heat dissipation fin extends along the axial direction of the iron core.
[0009] In combination with the first aspect, in a possible implementation manner, a dimension of the first heat dissipation fin protruding from the inner wall of the first cooling channel is H1, a thickness dimension of the first heat dissipation fin is D1, and H1>D1.
[0010] In combination with the first aspect, in a possible implementation manner, a second heat dissipation fin is protrudingly provided on an inner wall of the second cooling channel, and the second heat dissipation fin extends along the axial direction of the iron core.
[0011] In combination with the first aspect, in a possible implementation manner, a dimension of the second heat dissipating fin protruding from the inner wall of the second cooling channel is H2, a thickness dimension of the second heat dissipating fin is D2, and H2>D2.
[0012] In combination with the first aspect, in a possible implementation, it also includes a liquid inlet nozzle, the liquid inlet nozzle includes a liquid inlet barrel part and a liquid outlet barrel part, the liquid inlet barrel part is connected to the first cooling channel, and the liquid outlet barrel part is connected to the second cooling channel.
[0013] In combination with the first aspect, in a possible implementation, the liquid inlet nozzle also includes a main cylinder portion, which is sleeved on the second axial end of the iron core, and the liquid inlet cylinder portion and the liquid outlet cylinder portion are arranged at an end of the main cylinder portion away from the iron core.
[0014] In combination with the first aspect, in a possible implementation manner, the liquid inlet nozzle is an integrated piece.
[0015] In combination with the first aspect, in a possible implementation manner, the liquid inlet cylinder has a liquid inlet hole, and the liquid inlet hole is connected to the first end of the first cooling channel;
[0016] The liquid outlet cylinder has a liquid outlet hole, and the liquid outlet hole is communicated with the first end of the second cooling channel.
[0017] In combination with the first aspect, in a possible implementation, the channel includes a first section and a second section along the axial direction, the first section is connected between the liquid inlet nozzle and the second section, and the first section gradually expands from the connection with the second section toward the direction close to the liquid inlet nozzle.
[0018] In a second aspect, the present application provides a linear motor, comprising a secondary component and a primary component as described in the first aspect, wherein the secondary component comprises a housing into which the iron core extends.
[0019] In combination with the second aspect, in a possible implementation, the iron core is provided with a wire groove, the wire groove surrounds the first cooling channel and the second cooling channel, the winding coil is wound in the wire groove, the inner wall of the casing is provided with a magnet, the magnet surrounds the iron core, and there is an air gap between the magnet and the iron core.
[0020] In combination with the second aspect, in a possible implementation, the linear motor also includes a first stop member, the first stop member is connected to one end of the iron core extending out of the housing, a second stop member is protruding from the outer wall of the housing, an elastic member is arranged between the first stop member and the second stop member, and the elastic member is sleeved on the iron core.
[0021] In a third aspect, the present application provides a suspension system, wherein the suspension system comprises the linear motor as described in the second aspect.
[0022] In a fourth aspect, the present application provides a vehicle, characterized in that the vehicle comprises a suspension system as described in the third aspect.
[0023] In this solution, the coolant flows into the first cooling channel and flows out from the second cooling channel. During the flow of the coolant in the first cooling channel and the second cooling channel, the coolant can take away the heat of the iron core, reduce the temperature of the iron core, and thereby reduce the temperature inside the linear motor, which is beneficial to increasing the life of the linear motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the background technology, the drawings required for use in the embodiments of the utility model or the background technology will be described below.
[0025] Figure 1 A front view of a linear motor provided by an embodiment of the utility model;
[0026] Figure 2 A cross-sectional view of a linear motor provided in one embodiment of the utility model;
[0027] Figure 3 A schematic diagram of the three-dimensional structure of an iron core provided in one embodiment of the utility model;
[0028] Figure 4 A cross-sectional view of an iron core provided in one embodiment of the utility model;
[0029] Figure 5 A top view of an iron core provided in one embodiment of the utility model.
[0030] Description of reference numerals:
[0031] 100, iron core; 100a, channel; 100b, first section; 100c, second section; 110, first cooling channel; 111, first heat dissipation fin; 120, second cooling channel; 121, second heat dissipation fin; 130, shunt rib; 140, wire slot; 200, housing; 210, second stopper; 300, winding coil; 400, magnet; 500, sealing cover; 600, liquid inlet nozzle; 610, main cylinder; 620, liquid inlet cylinder; 621, liquid inlet hole; 630, liquid outlet cylinder; 631, liquid outlet hole; 700, elastic member; 800, first stopper; 900, air gap. DETAILED DESCRIPTION
[0032] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.
[0033] The embodiment of the utility model provides a vehicle, which can be, but is not limited to, an electric vehicle or a fuel vehicle. The vehicle includes a body, wheels, and an electromagnetic suspension, one end of the electromagnetic suspension is connected to the body, and the other end of the electromagnetic suspension is connected to the wheel. When the electromagnetic suspension is applied to the vehicle, during the driving process of the vehicle, especially when driving on a rough road, the electromagnetic suspension can increase the contact area between the vehicle and the ground, reduce the rebound effect of the wheel when rolling, play a role in shock absorption and damping for the vehicle, and improve the driving experience of the driver in the vehicle and the riding experience of the passengers in the vehicle.
[0034] Electromagnetic suspension includes linear motors, see Figure 1 and Figure 2 The linear motor includes a primary assembly and a secondary assembly. The primary assembly includes an iron core 100, which is a columnar structure. The secondary assembly includes a housing 200 and a magnet 400, and the housing 200 is a cylindrical structure. The iron core 100 is inserted into the housing 200, the first end of the iron core 100 extends into the housing 200, and the second end of the iron core 100 extends out of the housing 200. One of the iron core 100 and the housing 200 is provided with a magnet 400, and the other is provided with a winding coil 300.
[0035] In the linear motor provided by the utility model, the iron core 100 serves as the stator of the linear motor, the housing 200 serves as the mover of the linear motor, and the housing 200 can move linearly relative to the iron core 100. Specifically, the outer wall of the iron core 100 is recessed with a wire groove 140, and the winding coil 300 is wound in the wire groove 140. The inner wall of the housing 200 is provided with a magnet 400, which surrounds the iron core 100 and has an air gap 900 with the outer wall of the iron core 100. When the winding coil 300 is energized, it can generate a magnetic field. The magnetic field generated by the winding coil 300 and the magnetic field generated by the magnet 400 interact with each other, so that the winding coil 300 and the magnet 400 can move relative to each other, thereby causing the iron core 100 and the housing 200 to slide relative to each other.
[0036] It should be noted that the material of the magnet 400 can be neodymium iron boron, ferrite, samarium cobalt and other materials. There are multiple magnets 400, each magnet 400 is roughly rectangular, and each magnet 400 is attached to the inner wall of the housing 200 and surrounds the iron core 100. The multiple magnets 400 are arranged in a Halbach array. By arranging the multiple magnets 400 in a Halbach array, the magnetic field strength of the magnets 400 can be improved. The housing 200 is a non-magnetic heat-treated strengthened aluminum alloy material.
[0037] In the linear motor provided by the utility model, the linear motor also includes a first stopper 800, the first stopper 800 is connected to the end of the iron core 100 extending out of the housing 200, the outer wall of the housing 200 is convexly provided with a second stopper 210, an elastic member 700 is arranged between the first stopper 800 and the second stopper 210, and the elastic member 700 is sleeved on the iron core 100. The magnetic field generated by the winding coil 300 interacts with the magnetic field generated by the magnet 400 so that when the housing 200 slides in the direction of the end of the iron core 100 extending out of the housing 200, the housing 200 compresses the elastic member 700, and the elastic member 700 plays a buffering role on the housing 200 when it moves in a straight line, thereby improving the shock absorption performance of the electromagnetic suspension. Among them, the elastic member 700 can be a spring, such as an air spring, a coil spring, etc.
[0038] In the linear motor provided by the present invention, there are multiple wire slots 140, and the multiple wire slots 140 are arranged at intervals along the axial direction of the iron core 100. Each wire slot 140 extends along the circumference of the iron core 100. Each wire slot 140 is roughly annular. Each wire slot 140 is wound with a winding coil 300, and every two adjacent winding coils 300 are electrically connected. The magnet 400 surrounds the iron core 100, and the magnet 400 and the iron core 100 are spaced apart to form an air gap 900, and the size of the air gap 900 is between 0.5-2mm.
[0039] In the present invention, the core 100 is cylindrical as an example, the width of the wire slot 140 along the axial direction of the core 100 is k, the length of the core 100 along the axial direction is d, the wire slot 140 is n, and the first constant is a.
[0040] K=d×a / n
[0041] a is 0.3-0.7.
[0042] The radial depth of the wire slot 140 along the core 100 is h, the outer diameter of the core 100 is r1, the outer diameter of the core 100 refers to the radial distance from the outer wall where the core 100 contacts the second slide bearing to the axis of the core 100, the inner diameter of the core 100 is r2, the radial distance from the bottom wall of the wire slot 140 to the axis of the core 100, and the second constant is b.
[0043] H=(r1-r2)×b
[0044] b is 0.65-0.85.
[0045] Every two adjacent wire slots 140 are connected through a through hole, and every two adjacent winding coils 300 are electrically connected to the corresponding through hole. A plurality of winding coils 300 can be connected into multiple phases and connected to corresponding phase lines to form an armature winding. The armature winding is connected to a controller of the linear motor, and the controller is used to control the operation of the linear motor.
[0046] In the linear motor provided by the utility model, the core 100 is provided with a channel 100a, and the channel 100a has a shunt rib 130 extending along the axial direction of the core 100, and the shunt rib 130 divides the channel 100a into a first cooling channel 110 and a second cooling channel 120. The first cooling channel 110 and the second cooling channel 120 are connected at the first end of the channel.
[0047] The first axial end of the first cooling channel 110 and the first axial end of the second cooling channel 120 are located at the first end of the core 100, and the first axial end of the first cooling channel 110 is connected to the first axial end of the second cooling channel 120. The first cooling channel 110 is used for the coolant to flow in, and the second cooling channel 120 is used for the coolant to flow out.
[0048] It can be understood that the coolant flows into the first cooling channel 110 and flows out from the second cooling channel 120. During the flow of the coolant in the first cooling channel 110 and the second cooling channel 120, the coolant can take away the heat of the iron core 100, reduce the temperature of the iron core 100, and further reduce the temperature inside the linear motor, which is beneficial to increase the life of the linear motor.
[0049] In some embodiments, the diverter rib and the iron core are an integrated piece, which is relatively simple to process and does not require an additional water inlet channel, thus saving costs.
[0050] In the linear motor provided by the utility model, the shunt rib 130 is used to separate the first cooling channel 110 and the second cooling channel 120, so that the coolant entering the first cooling channel 110 flows along the axial direction of the iron core 100, and then enters the second cooling channel 120 from the connection between the first cooling channel 110 and the second cooling channel 120, so that the coolant can fully absorb the heat of the iron core 100, thereby improving the efficiency of the coolant cooling the iron core 100. The thickness of the shunt rib 130 is greater than 1 mm.
[0051] The coolant may be, but is not limited to, water. Water has a higher specific heat capacity and a higher heat absorption capacity, and can further improve the efficiency of cooling the iron core 100 .
[0052] In the linear motor provided by the present invention, the area where the first axial end of the first cooling channel 110 and the first axial end of the second cooling channel 120 are connected passes through the first end of the iron core 100 extending into the housing 200. In order to prevent the coolant from flowing out from the first end of the iron core 100 extending into the housing 200, see Figure 3The linear motor is also provided with a sealing cover 500, which is provided at the first end of the core 100 and blocks the area where the first cooling channel 110 and the second cooling channel 120 are connected. It can be understood that since the connecting area of the first cooling channel 110 and the second cooling channel 120 passes through the first end of the core 100, it can be obtained that when the first cooling channel 110 and the second cooling channel 120 are opened, the first cooling channel 110 can pass through the core 100 along the axial direction of the core 100, and the axis of the second cooling channel 120 can pass through the core 100, and the axial first end of the first cooling channel 110 and the axial first end of the second cooling channel 120 are connected, and then the area where the first cooling channel 110 and the second cooling channel 120 are connected is blocked by the sealing cover 500, which can simplify the process of forming the first cooling channel 110 and the second cooling channel 120. The material of the sealing cover 500 is a non-magnetic heat-treated strengthened aluminum alloy material.
[0053] In the embodiment provided by the utility model, the first cooling channel 110 and the second cooling channel 120 are both arranged along the axial direction of the iron core 100, the shunt rib 130 extends along the axial direction of the iron core 100, the shunt rib 130 along the axial direction of the iron core 100 is smaller than the axial direction of the iron core 100, the shunt rib 130 along the axial direction of the iron core 100 is smaller than the axial direction of the first cooling channel 110 along the iron core 100, and the axial direction of the shunt rib 130 along the iron core 100 is smaller than the axial direction of the second cooling channel 120 along the iron core 100. The shunt rib 130 extends from one end of the iron core 100 extending out of the housing 200 toward the other end of the iron core 100, so that the axial first end of the first cooling channel 110 is connected to the end of the second cooling channel 120 away from the part of the iron core 100 extending out of the housing 200.
[0054] In the embodiments provided in this utility model, please refer to Figure 4 and Figure 5 The inner wall of the first cooling channel 110 is provided with a first heat dissipation fin 111, which extends along the axial direction of the iron core 100. The dimension of the first heat dissipation fin 111 protruding from the inner wall of the first cooling channel 110 is H1, and the thickness dimension of the first heat dissipation fin 111 is D1. H1>D1, and the thickness of the first heat dissipation fin 111 is greater than 1mm. The first heat dissipation fin 111 is used to increase the area of the inner wall of the first cooling channel 110, increase the contact area between the coolant and the first cooling channel 110, and thus improve the cooling efficiency of the coolant cooling the iron core 100. The inner wall of the second cooling channel 120 is provided with a second heat dissipation fin 121, which extends along the axial direction of the iron core 100.
[0055] The second heat dissipation fin 121 protrudes from the inner wall of the second cooling channel 120 by a dimension H2, and the thickness dimension of the second heat dissipation fin 121 is D2, H2>D2, and the thickness of the second heat dissipation fin 121 is greater than 1 mm. The second heat dissipation fin 121 is used to increase the area of the inner wall of the first cooling channel 110, increase the contact area between the coolant and the second cooling channel 120, and thus improve the cooling efficiency of the coolant cooling the iron core 100.
[0056] In the linear motor provided by the present utility model, please refer to Figure 4 The linear motor further comprises a liquid inlet nozzle 600, which comprises a main barrel 610, a liquid inlet barrel 620 and a liquid outlet barrel 630 connected to each other. The main barrel 610 is sleeved on one end of the iron core 100 extending out of the housing 200, and the liquid inlet barrel 620 and the liquid outlet barrel 630 are arranged at one end of the main barrel 610 away from the iron core 100. The liquid inlet barrel 620 is communicated with the first cooling channel 110, and the liquid outlet barrel 630 is communicated with the second cooling channel 120. The liquid inlet nozzle 600 can flow the cooling liquid into the first cooling channel 110, and it is also convenient for the cooling liquid to flow out of the second cooling channel 120. Specifically, the liquid inlet barrel 620 in the liquid inlet nozzle 600 can be conveniently connected to an external infusion tube, thereby facilitating the cooling liquid to enter the first cooling channel 110, and the liquid outlet barrel 630 in the liquid inlet nozzle 600 can be conveniently connected to an external outlet pipe, which can facilitate the cooling liquid to be discharged from the second cooling channel 120 to the outlet pipe.
[0057] Among them, the liquid inlet cylinder 620 has a liquid inlet hole 621, which is connected to the first cooling channel 110, and the liquid outlet cylinder 630 has a liquid outlet hole 631, which is connected to the second cooling channel 120, and the liquid outlet hole 631 is spaced apart from the liquid inlet hole 621.
[0058] In the embodiment provided in the present application, the channel 100a includes a first section 100b and a second section 100c along the axial direction, the first section 100b and the second section 100c are connected, the first section 100b is connected between the liquid inlet nozzle and the second section 100c, and the first section 100b expands from the connection with the second section 100c toward the direction close to the liquid inlet nozzle 600. Specifically, the diameter of the first section 100b is greater than 22mm, and the diameter of the second section 100c is greater than 20mm. The first section 100b expands from the connection with the second section 100c toward the direction close to the liquid inlet nozzle 600, which can reduce the pressure generated when the coolant enters the first cooling channel 110 from the liquid inlet hole 621, and can reduce the pressure generated when the coolant is discharged from the second cooling channel 120 to the liquid outlet hole 631.
[0059] The liquid inlet nozzle 600 is made of non-magnetic heat-treated and strengthened aluminum alloy material.
[0060] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0061] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0062] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0063] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0064] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A primary assembly for a linear motor, characterized in that: It includes an iron core, which has an axially arranged channel. A shunt rib is arranged in the channel. The shunt rib is arranged axially and divides the channel into a first cooling channel and a second cooling channel. The first cooling channel and the second cooling channel are connected at the first end of the channel.
2. The primary component for a linear motor according to claim 1, characterized in that: The first end of the channel is close to the axial first end of the iron core, the second end of the channel is arranged at the axial second end of the iron core, and the second end of the channel is provided with a liquid inlet and a liquid outlet.
3. The primary component for a linear motor according to claim 1 or 2, characterized in that: A winding coil is arranged axially on the outer periphery of the iron core.
4. The primary assembly for a linear motor according to claim 1, characterized in that: The first end of the channel passes through the first axial end of the iron core, and a sealing cover is provided at the first end of the channel to seal the first end of the channel.
5. The primary assembly for a linear motor according to claim 1, characterized in that: The inner wall of the first cooling channel is provided with a first heat dissipation fin, and the first heat dissipation fin extends along the axial direction of the iron core.
6. The primary assembly for a linear motor according to claim 5, characterized in that: The dimension of the first heat dissipation fin protruding from the inner wall of the first cooling channel is H1, and the thickness dimension of the first heat dissipation fin is D1, where H1>D1.
7. The primary assembly for a linear motor according to claim 6, characterized in that: The inner wall of the second cooling channel is protruded with a second heat dissipation fin, and the second heat dissipation fin extends along the axial direction of the iron core.
8. The primary assembly for a linear motor according to claim 7, characterized in that: The dimension of the second heat dissipating fin protruding from the inner wall of the second cooling channel is H2, and the thickness of the second heat dissipating fin is D2, where H2>D2.
9. The primary assembly for a linear motor according to claim 1, characterized in that: It also includes a liquid inlet nozzle, which includes a liquid inlet barrel part and a liquid outlet barrel part, the liquid inlet barrel part is connected to the first cooling channel, and the liquid outlet barrel part is connected to the second cooling channel.
10. The primary assembly for a linear motor according to claim 9, characterized in that: The liquid inlet nozzle also includes a main cylinder portion, which is sleeved on the second axial end of the iron core, and the liquid inlet cylinder portion and the liquid outlet cylinder portion are arranged at one end of the main cylinder portion away from the iron core.
11. The primary assembly for a linear motor according to claim 9, characterized in that: The liquid inlet nozzle is an integrated part.
12. The primary assembly for a linear motor according to claim 9, characterized in that: The liquid inlet cylinder has a liquid inlet hole, and the liquid inlet hole is connected to the first end of the first cooling channel; The liquid outlet cylinder has a liquid outlet hole, and the liquid outlet hole is communicated with the first end of the second cooling channel.
13. The primary assembly for a linear motor according to claim 9, characterized in that: The channel includes a first section and a second section along the axial direction, the first section is connected between the liquid inlet nozzle and the second section, and the first section gradually expands from the connection with the second section toward the direction close to the liquid inlet nozzle.
14. A linear motor, characterized in that: The linear motor comprises a secondary component and a primary component as claimed in any one of claims 1 to 13, wherein the secondary component comprises a casing into which the iron core extends.
15. The linear motor according to claim 14, characterized in that: The iron core is provided with a wire groove, the wire groove surrounds the first cooling channel and the second cooling channel, the winding coil is wound in the wire groove, the inner wall of the housing is provided with a magnet, the magnet surrounds the iron core, and an air gap is provided between the magnet and the iron core.
16. The linear motor according to claim 15, characterized in that: The linear motor also includes a first stopper connected to an end of the iron core extending out of the housing, a second stopper is protruding from the outer wall of the housing, an elastic member is arranged between the first stopper and the second stopper, and the elastic member is sleeved on the iron core.
17. A suspension system, characterized in that: The suspension system comprises a linear motor as claimed in any one of claims 14-16.
18. A vehicle, characterized in that: The vehicle includes the suspension system of claim 17 .