Linear motor, actuator, suspension system and vehicle

Abstract

The utility model relates to a linear motor, an actuator, a suspension system and a vehicle. The linear motor comprises a first mechanism; the second mechanism is sleeved with the first mechanism; the guide mechanism comprises a sliding block and a sliding rail, the sliding block is connected with one of the first mechanism and the second mechanism, the sliding rail is connected with the other one of the first mechanism and the second mechanism, and the sliding block is matched with the sliding rail so as to guide the first mechanism to move relative to the second mechanism in the axial direction of the linear motor. One of the first mechanism and the second mechanism is connected with the sliding block, the other of the first mechanism and the second mechanism is connected with the sliding rail, and the sliding block is matched with the sliding rail, so that the first mechanism moves relative to the second mechanism in the axial direction of the linear motor. The sliding block and the sliding rail are in surface contact, the contact area is large, abrasion resistance is achieved, the possibility of dislocation separation is small, the possibility of lateral deflection between the first mechanism and the second mechanism can be reduced, and therefore the service life of the linear motor is prolonged, and the performance stability of the linear motor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, and in particular to a linear motor, an actuator, a suspension system and a vehicle. BACKGROUND

[0002] In the related art, a linear motor generally comprises a stator, a mover and a guide mechanism, and the mover moves linearly along the guide mechanism by the stator. In the use of a common linear motor, the connection between the mover and the guide mechanism is severely worn, and even deformed and broken, which seriously shortens the service life of the linear motor and affects the performance stability of the linear motor. SUMMARY

[0003] The embodiments of the present application provide a linear motor, an actuator, a suspension system and a vehicle, which improve the service life and performance stability of the linear motor to at least partially solve the above technical problems.

[0004] To achieve the above object, according to a first aspect of the present application, a linear motor is provided, comprising:

[0005] a first mechanism;

[0006] a second mechanism, which is sleeved with the first mechanism;

[0007] a guide mechanism, comprising a sliding block and a sliding rail, the sliding block being connected with one of the first mechanism and the second mechanism, the sliding rail being connected with the other of the first mechanism and the second mechanism, and the sliding block cooperating with the sliding rail to guide the first mechanism to move relative to the second mechanism along the axial direction of the linear motor.

[0008] In some embodiments, the first mechanism comprises a primary unit, and the second mechanism comprises a secondary unit, and the secondary unit is sleeved on the primary unit.

[0009] In some embodiments, the guide mechanism comprises one sliding block, and the sliding block is arranged at one end of the primary unit.

[0010] In some embodiments, the linear motor comprises two sliding blocks, and the two sliding blocks are arranged at two ends of the primary unit, respectively.

[0011] In some embodiments, the linear motor comprises at least three sliding blocks, two of the at least three sliding blocks are arranged at two ends of the primary unit, respectively, and the remaining sliding block is arranged between the two sliding blocks and configured to divide the primary unit into multiple segments.

[0012] In some embodiments, a first connecting structure is protruded on the outer circumferential surface of the sliding block, and the sliding block is slidingly connected with the sliding rail through the first connecting structure.

[0013] In some embodiments, in the radial direction of the linear motor, the cross section of the first connecting structure is an axisymmetric figure.

[0014] In some embodiments, the slide rail is provided with a first sliding groove, and the first sliding groove is in sliding cooperation with the first connecting structure.

[0015] In some embodiments, the slide rail is embedded on the secondary unit.

[0016] In some embodiments, the slide rail penetrates the secondary unit in the radial direction of the linear motor.

[0017] In some embodiments, the guide mechanism comprises a plurality of slide rails, the plurality of slide rails are arranged at intervals along the circumference of the secondary unit, the sliding block is provided with a plurality of first connecting structures, and the plurality of first connecting structures are arranged correspondingly with the plurality of slide rails.

[0018] In some embodiments, the slide rail has opposite first and second ends, and the guide mechanism further comprises a support ring, and the first ends of the plurality of slide rails are connected to the same side of the support ring.

[0019] In some embodiments, the sliding block is configured to be arranged at the end of the primary unit away from the support ring when the guide mechanism comprises only one sliding block.

[0020] In some embodiments, the second mechanism further comprises a housing, and the primary unit, the secondary unit and the guide mechanism are arranged in the housing.

[0021] In some embodiments, the slide rail is fixedly connected with the housing, and / or the support ring is fixedly connected with the housing.

[0022] In some embodiments, a first recess is formed on the inner side wall of the housing, the first recess extends in the axial direction of the linear motor, and the slide rail is arranged in the first recess.

[0023] In some embodiments, a second recess is formed on the inner surface of the end of the housing close to the support ring, the second recess is an annular recess extending in the circumferential direction of the linear motor, and the second recess is in cooperation with the support ring.

[0024] In some embodiments, a first mounting hole is formed on the end of the housing close to the support ring, and the diameter of the first mounting hole is smaller than the diameter of the support ring.

[0025] In some embodiments, the first mounting hole comprises a first hole section away from the guide mechanism, and the second mechanism further comprises a sliding bearing arranged in the first hole section.

[0026] In some embodiments, the sliding block is configured to be arranged at the end of the primary unit away from the support ring when the guide mechanism comprises only one sliding block, and the sliding bearing is arranged at the other end of the primary unit.

[0027] In some embodiments, the first mechanism further comprises a center rod, and the primary unit, the support ring and the sliding block are sleeved on the center rod.

[0028] In some embodiments, the center rod is fixedly connected with the sliding block.

[0029] In some embodiments, a first limiting structure is protruded on the outer circumferential surface of the center rod, and the primary unit is arranged between the sliding block and the first limiting structure.

[0030] In some embodiments, the outer circumferential surface of the first limiting structure is arranged in a gap with the sliding rail.

[0031] In some embodiments, one of the center rod and the sliding block is provided with a third groove, and the other is provided with a second limiting structure, and the third groove is connected with the second limiting structure in a matched manner.

[0032] In some embodiments, the primary unit is arranged at one end of the center rod.

[0033] In some embodiments, the end of the center rod away from the primary unit is arranged to pass through the first mounting hole.

[0034] In some embodiments, the first mounting hole further comprises a second hole section close to the guide mechanism, and the diameter of the second hole section is smaller than the diameter of the first limiting structure.

[0035] In some embodiments, the first hole section and the second hole section are connected, the diameter of the first hole section is larger than the diameter of the second hole section, and the first hole section is connected with the sliding bearing in a matched manner.

[0036] In some embodiments, the linear motor further comprises a fork arm assembly, the fork arm assembly is connected with the shell, and the fork arm assembly is arranged opposite to the first mounting hole.

[0037] In some embodiments, the fork arm assembly has a second connecting structure, the second connecting structure is connected to the second end of the sliding rail, and the secondary unit is arranged between the second connecting structure and the support ring.

[0038] In some embodiments, the fork arm assembly further comprises a body, the second connecting structure is arranged on a surface of the body, and the body is connected with the shell.

[0039] In some embodiments, the primary unit is one of a stator assembly or a rotor assembly, and the secondary unit is the other.

[0040] According to a second aspect of the present application, a linear motor is provided.

[0041] According to a third aspect of the present application, a suspension system is provided.

[0042] According to a fourth aspect of the present application, a vehicle is provided.

[0043] In the linear motor of this application embodiment, by connecting one of the first mechanism and the second mechanism to a slider and the other to a slide rail, the cooperation between the slider and the slide rail allows the first mechanism to slide relative to the second mechanism along the axial direction of the linear motor. Because the slider and the slide rail have surface contact with a large contact area, they are wear-resistant, reducing the likelihood of misalignment or separation between them. This helps to reduce the possibility of lateral deflection between the first and second mechanisms, thereby improving the service life and performance stability of the linear motor.

[0044] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0047] Figure 1 This is a cross-sectional view of a linear motor provided in an embodiment of this application;

[0048] Figure 2 This is a schematic diagram of a slider setting method provided in an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of another slider setting method provided in an embodiment of this application;

[0050] Figure 4 yes Figure 1 A schematic diagram of the slider in the provided linear motor;

[0051] Figure 5 yes Figure 1 A schematic diagram showing the connection between the housing and the slide rail in the provided linear motor;

[0052] Figure 6 yes Figure 5 A sectional view of the provided casing;

[0053] Figure 7 This is a schematic diagram of a slide rail setting method provided in an embodiment of this application;

[0054] Figure 8 yes Figure 1Another structural schematic diagram of the provided linear motor (the primary unit, the secondary unit shell and the fork arm assembly are not shown);

[0055] Figure 9 is Figure 1 A connection schematic diagram of the primary unit and the center rod in the provided linear motor.

[0056] Explanation of reference signs:

[0057] 10, first mechanism; 11, primary unit;

[0058] 20, second mechanism; 21, secondary unit;

[0059] 3, guide mechanism; 31, sliding block; 311, first connecting structure; 312, second limiting structure; 32, sliding rail; 321, first sliding groove; 33, support ring;

[0060] 4, shell; 41, second groove; 42, first mounting hole; 421, first hole section; 422, second hole section;

[0061] 5, center rod; 51, first limiting structure;

[0062] 6, sliding bearing;

[0063] 7, fork arm assembly; 71, second connecting structure; 72, body; 73, fork arm. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0065] The linear motor generally utilizes a stator to make a mover move linearly along a guide mechanism 3. In actual use scenarios, the connection part of the mover and the guide mechanism 3 is severely worn and there is a large noise, because when the linear motor works, due to the existence of magnetic bias force, there is a lateral force between the mover and the stator, so that the mover is tightly connected with the guide mechanism 3, the frictional resistance of the relative sliding between the mover and the guide mechanism 3 is increased, the wear is intensified, and if the contact area of the mover and the guide mechanism 3 is too small, the lateral deflection between the stator and the mover may also occur, which seriously affects the performance stability of the linear motor.

[0066] According to a first aspect of the present application, a linear motor is provided, please refer to Figure 1 , Figure 1is a sectional view of a linear motor provided by an embodiment of the present application. The linear motor provided by the present application comprises: a first mechanism 10; a second mechanism 20, which is sleeved with the first mechanism 10; a guiding mechanism 3, which comprises a sliding block 31 and a sliding rail 32, the sliding block 31 is connected with one of the first mechanism 10 and the second mechanism 20, the sliding rail 32 is connected with the other of the first mechanism 10 and the second mechanism 20, and the sliding block 31 cooperates with the sliding rail 32 to guide the first mechanism 10 to move relative to the second mechanism 20 along the axial direction of the linear motor.

[0067] In the embodiment of the present application, when the linear motor works, the first mechanism 10 and the second mechanism 20 are actuated by electromagnetic force, therefore, by connecting one of the first mechanism 10 and the second mechanism 20 with the sliding block 31 and connecting the other with the sliding rail 32, and by the cooperation of the sliding block 31 and the sliding rail 32, the second mechanism 20 slides relative to the first mechanism 10 along the axial direction of the linear motor. Since the sliding block 31 and the sliding rail 32 are in surface contact, the contact area is large and wear-resistant, so that the possibility of dislocation and separation between the sliding block 31 and the sliding rail 32 is small, which helps to reduce the possibility of lateral deflection between the first mechanism 10 and the second mechanism 20, thereby improving the service life and performance stability of the linear motor.

[0068] In some embodiments of the present application, the surfaces of the sliding block 31 and the sliding rail 32 are provided with high-strength wear-resistant plating layers.

[0069] Please continue to refer to Figure 1 In some embodiments of the present application, the first mechanism 10 comprises a primary unit 11, and the second mechanism 20 comprises a secondary unit 21, and the secondary unit 21 is sleeved on the primary unit 11.

[0070] In some embodiments of the present application, the sliding rail 32 is fixedly connected with the secondary unit 21. For example, the sliding rail 32 is integrally fixed with the secondary unit 21 by glue pouring.

[0071] In some embodiments of the present application, the guiding mechanism 3 comprises one sliding block 31, and one sliding block 31 is arranged at one end of the primary unit 11.

[0072] Please refer to Figure 2 , Figure 2 is a schematic diagram of a sliding block arrangement provided by an embodiment of the present application. In some embodiments of the present application, the linear motor comprises two sliding blocks 31, and the two sliding blocks 31 are arranged at two ends of the primary unit 11.

[0073] In the embodiment of the present application, the slider 31 is arranged at both ends of the primary unit 11, so that when the primary unit 11 slides relative to the secondary unit 21, both ends of the primary unit 11 are constrained by the slider 31 and the slide rail 32 to slide along the slide rail 32, so that the possibility of deviating from the slide rail 32 during sliding can be reduced, and the stability of the primary unit 11 sliding along the slide rail 32 is improved, thereby improving the performance stability of the linear motor.

[0074] Referring to Figure 3 , Figure 3 is another schematic diagram of the arrangement of the slider provided in the embodiment of the present application. In some embodiments of the present application, the linear motor includes at least three sliders 31, two of which are arranged at the two ends of the primary unit 11, and the remaining slider 31 is arranged between the two sliders 31 and is configured to divide the primary unit 11 into multiple segments. Similar or identical technical effects can be achieved as in the above embodiment in which the linear motor includes two sliders 31 arranged at the two ends of the primary unit 11, and the present application will not be described here.

[0075] Referring to Figure 4 , Figure 4 is Figure 1 schematic diagram of the structure of the slider in the linear motor. In some embodiments of the present application, the outer circumferential surface of the slider 31 is convexly provided with a first connecting structure 311, and the slider 31 is connected with the slide rail 32 through the first connecting structure 311.

[0076] In the embodiment of the present application, by convexly providing the first connecting structure 311 on the outer circumferential surface of the slider 31 and connecting the slider 31 and the slide rail 32 through the first connecting structure 311, the contact between the slide rail 32 and the slider 31 and the primary unit 11 can be reduced or avoided, which helps to reduce wear and tear, thereby improving the service life of the linear motor, and also reduces the resistance when the slider 31 slides along the slide rail 32, thereby improving the performance of the linear motor.

[0077] Please continue to refer to Figure 4 In some embodiments of the present application, in the radial direction of the linear motor, the cross section of the first connecting structure 311 is an axisymmetric figure.

[0078] In the embodiment of the present application, by making the cross section of the first connecting structure 311 an axisymmetric figure in the radial direction of the linear motor, the surface on which the two sides of the axisymmetric figure are located can be used to simultaneously bear radial load and circumferential load, and compared with other shapes, the performance of the first connecting structure 311 with the cross section of an axisymmetric figure is good in bearing radial load and circumferential load.

[0079] In some embodiments of the present application, the cross section of the first connecting structure 311 is a triangle, a semicircle, or the like.

[0080] In some embodiments of the present application, the first connecting structure 311 has a cross section in the shape of an isosceles right triangle.

[0081] Please refer to Figure 5 and Figure 6 , Figure 5 is Figure 1 a structure diagram of the connection between the housing and the slide rail in the linear motor provided by the present application, Figure 6 is Figure 5 a cross-sectional view of the housing provided by the present application. In some embodiments of the present application, the slide rail 32 is provided with a first sliding groove 321, which is in sliding cooperation with the first connecting structure 311.

[0082] In the embodiments of the present application, compared with other sliding connection forms, the connection form of the sliding groove and the slide block 31 has good stability, so that the stability of the connection between the sliding groove and the first connecting structure 311 can be utilized to improve the performance stability of the linear motor.

[0083] In some embodiments of the present application, the slide rail 32 is embedded on the secondary unit 21. In this way, the radial size of the linear motor can be reduced, thereby reducing the weight of the linear motor and achieving light weight.

[0084] In some embodiments of the present application, the secondary unit 21 includes magnetic steels arranged at intervals around the primary unit 11, and the slide rail 32 is arranged between two circumferentially adjacent magnetic steels.

[0085] In some embodiments of the present application, the slide rail 32 penetrates the secondary unit 21 in the radial direction of the linear motor.

[0086] With such a solution, in the radial direction of the linear motor, the slide rail 32 will no longer occupy additional space, which helps to further reduce the radial size of the linear motor. At the same time, the secondary unit 21 also limits the movement of the slide rail 32 in the circumferential direction of the linear motor.

[0087] Please refer to Figure 7 , Figure 7 is a schematic diagram of a slide rail arrangement provided by an embodiment of the present application. In some embodiments of the present application, the guide mechanism 3 includes a plurality of slide rails 32, which are arranged at intervals along the circumference of the secondary unit 21, and the slide block 31 has a plurality of first connecting structures 311, which are arranged in correspondence with the plurality of slide rails 32.

[0088] In this way, the primary unit 11 can be connected to the slide rail 32 at multiple circumferential positions, which helps to constrain the primary unit 11 at multiple circumferential positions by the slide block 31 and the slide rail 32, reduces the possibility of the primary unit 11 deviating from the slide rail 32 during sliding, and helps to improve the stability of the primary unit 11 sliding along the slide rail 32, thereby improving the performance stability of the linear motor.

[0089] In some embodiments of the present application, the guide mechanism 3 has three or more than three slide rails 32.

[0090] In some embodiments of the present application, the slide rails 32 are arranged equidistantly along the circumference of the secondary unit 21.

[0091] Referring to Figure 7 and Figure 8 , Figure 8 is Figure 1 Another structural diagram of the linear motor provided by the present application (the primary unit, the secondary unit shell and the fork arm assembly are not shown). In some embodiments of the present application, the slide rail 32 has opposite first and second ends, and the guide mechanism 3 further comprises a support ring 33, and the first ends of the plurality of slide rails 32 are connected to the same side of the support ring 33.

[0092] In embodiments of the present application, by connecting the plurality of slide rails 32 by the support ring 33, the strength and rigidity of the slide rails 32 can be enhanced by the support ring 33. At the same time, the support ring 33 can also bear a certain load, reducing the load borne by the secondary unit 21, and protecting the secondary unit 21 to a certain extent.

[0093] In some embodiments of the present application, the slide rail 32 and the support ring 33 are positioned by pins or bolts; and / or, are fixed as a whole by glue pouring.

[0094] In some embodiments of the present application, the sliding block 31 is configured such that when the guide mechanism 3 includes only one sliding block 31, the sliding block 31 is arranged at the end of the primary unit 11 away from the support ring 33. In this way, the possibility of occurrence of jamming phenomenon can be reduced, in addition, the requirement for manufacturing precision can also be reduced, which helps to reduce the cost.

[0095] Referring to Figure 5 and Figure 6 In some embodiments of the present application, the second mechanism 20 further comprises a shell 4, and the primary unit 11, the secondary unit 21 and the guide mechanism 3 are arranged in the shell 4.

[0096] In embodiments of the present application, by arranging the primary unit 11, the secondary unit 21 and the guide mechanism 3 in the shell 4, the shell 4 can be used to prevent water and dust, reducing the adverse effects of the external environment on the performance of the linear motor, and helping to improve the stability of the performance of the linear motor. At the same time, the shell 4 also has a certain supporting effect, and provides a mounting structure for other parts.

[0097] In some embodiments of the present application, the slide rail 32 is fixedly connected with the shell 4.

[0098] In some embodiments of the present application, the support ring 33 is fixedly connected with the shell 4.

[0099] With the scheme, relative movement between the slide rail 32 and the shell 4 and between the support ring 33 and the shell 4, such as rotation of the slide rail 32 along the circumference of the shell 4, can be avoided, and only relative sliding between the primary unit 11 and the secondary unit 21 in the linear motor exists, thereby improving the performance stability of the linear motor.

[0100] In some embodiments of the present application, the slide rail 32 and the inner side wall of the shell 4 are bonded.

[0101] In some embodiments of the present application, a first groove (not shown in the figure) is formed on the inner side wall of the shell 4, the first groove extends along the axial direction of the linear motor, and the slide rail 32 is arranged in the first groove.

[0102] In the embodiments of the present application, the first groove is formed on the inner side wall of the shell 4, and the slide rail 32 is connected with the shell 4 by using the first groove, which helps to reduce the radial dimension of the linear motor, thereby reducing the weight of the linear motor and achieving light weight. At the same time, the first groove can also be used to limit the slide rail 32 in the circumferential direction of the linear motor. In addition, the connection form of the slide groove and the slide rail 32 has a large connection area and good connection stability, which helps to improve the performance stability of the linear motor.

[0103] Please continue to refer to Figure 5 and Figure 6 In some embodiments of the present application, a second groove 41 is formed on the inner surface of one end of the shell 4 close to the support ring 33, the second groove 41 is an annular groove extending along the circumferential direction of the linear motor, and the second groove 41 is connected with the support ring 33 in a matched manner.

[0104] With the scheme, the distance between the secondary unit 21 and the end surface of the shell 4 is reduced, which helps to reduce the circumferential dimension of the linear motor and achieve light weight of the linear motor.

[0105] In some embodiments of the present application, a first mounting hole 42 is formed on one end of the shell 4 close to the support ring 33, and the diameter of the first mounting hole 42 is smaller than the diameter of the support ring 33. In this way, the support ring 33 can be prevented from passing out of the first mounting hole 42.

[0106] In some embodiments of the present application, the first mounting hole 42 includes a first hole section 421 away from the guide mechanism 3, and the second mechanism 20 further includes a sliding bearing 6 arranged in the first hole section 421.

[0107] With the scheme, the center rod 5 can be guided by using the bearing, the skewing of the center rod 5 can be avoided, the sliding of the primary unit 11 along the slide rail 32 can be ensured, and the performance stability of the linear motor can be ensured.

[0108] In some embodiments of the present application, the slider 31 is configured to be arranged at one end of the primary unit 11 away from the support ring 33 when the guide mechanism 3 only includes one slider 31, and the sliding bearing 6 is arranged at the other end of the primary unit 11.

[0109] In some embodiments of the present application, when the guide mechanism 3 has two or more sliders 31, whether to arrange the sliding bearing 6 can be selected according to actual needs.

[0110] Please refer to Figure 8 and Figure 9 , Figure 9 is Figure 1 a schematic diagram of the connection between the primary unit and the center rod in the linear motor provided. In some embodiments of the present application, the first mechanism 10 further includes a center rod 5, and the primary unit 11, the support ring 33 and the slider 31 are all sleeved on the center rod 5.

[0111] In some embodiments of the present application, the center rod 5 is fixedly connected with the slider 31. In this way, the relative movement between the slider 31 and the center rod 5 can be avoided, such as the slider 31 sliding along the axis of the center rod 5 or the slider 31 rotating along the circumference of the center rod 5, thereby reducing the influence of the above sliding and rotating on the relative sliding between the primary unit 11 and the secondary unit 21. For example, when the primary unit 11 slides relative to the secondary unit 21, the slider 31 slides along the axis of the center rod 5, and at this time, the sliding of the slider 31 along the axis of the center rod 5 will affect the performance of the linear motor, so that the fixed connection between the center rod 5 and the slider 31 in the embodiments of the present application can ensure the stability of the performance of the linear motor.

[0112] In some embodiments of the present application, the slider 31 is fixed on the center rod 5 through a nut.

[0113] Please continue to refer to Figure 8 and Figure 9 , in some embodiments of the present application, a first limiting structure 51 is protruded on the outer circumferential surface of the center rod 5, and the primary unit 11 is arranged between the slider 31 and the first limiting structure 51.

[0114] In some embodiments of the present application, the outer circumferential surface of the first limiting structure 51 is arranged in a gap with the sliding rail 32. In this way, the friction between the first limiting structure 51 and the sliding rail 32 can be reduced or avoided, thereby reducing the wear between the two and improving the service life of the linear motor. At the same time, the influence of the contact between the two on the performance of the linear motor can also be avoided, thereby ensuring the stability of the performance of the linear motor.

[0115] In some embodiments of the present application, one of the center rod 5 and the connecting surface of the slider 31 with the center rod 5 is provided with a third groove (not shown in the figure), and the other is provided with a second limiting structure 312, and the third groove and the second limiting structure 312 are connected in cooperation.

[0116] In the embodiment of the present application, the connection between the center rod 5 and the sliding block 31 is realized through the third groove on the center rod 5 and the second limiting structure 312 on the sliding block 31, which can avoid the rotation of the sliding block 31 along the circumference of the center rod 5, thereby improving the performance stability of the linear motor.

[0117] In some embodiments of the present application, the primary unit 11 is arranged at one end of the center rod 5.

[0118] The primary unit 11, the secondary unit 21 and the guide mechanism 3 are all located in the shell 4 and are all sleeved on the center rod 5, so that the position of the primary unit 11 on the center rod 5 will affect the sliding distance of the primary unit 11 relative to the secondary unit 21, for example, if the primary unit 11 is located at the middle part of the center rod 5, the primary unit 11 is away from both ends of the center rod 5 by a certain distance, such as d1 and d2, at this time, the sliding distance of the primary unit 11 is d1 or d2. In the embodiment of the present application, the primary unit 11 is arranged at one end of the center rod 5. In this way, when the primary unit 11 slides relative to the secondary unit 21 along the sliding rail 32, the sliding distance of the primary unit 11 will be d1+d2, obviously, the increase of the sliding distance of the primary unit 11 helps to improve the performance of the linear motor.

[0119] In some embodiments of the present application, the end of the center rod 5 away from the primary unit 11 is threaded through the first mounting hole 42. In this way, it is convenient for the center rod 5 to be connected with external elements and the like. At the same time, since the sliding block 31 is fixedly connected with the center rod 5, and the primary unit 11 is sleeved on the center rod 5, therefore, the threading of the center rod 5 through the first mounting hole 42 also provides a sliding space for the primary unit 11 to slide relative to the secondary unit 21.

[0120] In some embodiments of the present application, the first mounting hole 42 further comprises a second hole section 422 close to the guide mechanism 3, and the diameter of the second hole section 422 is smaller than that of the first limiting structure 51. In this way, the first limiting structure 51 can be prevented from being threaded out of the second hole section 422, thereby preventing the primary unit 11 located between the first limiting structure 51 and the sliding block 31 from being threaded out of the first mounting hole 42, and ensuring the performance of the linear motor.

[0121] Please refer to Figure 6 In some embodiments of the present application, the first hole section 421 and the second hole section 422, the diameter of the first hole section 421 is greater than that of the second hole section 422, and the first hole section 421 is connected with the sliding bearing 6 in a matched mode. In this way, while ensuring that the center rod 5 can be smoothly threaded out of the first mounting hole 42, the second hole section 422 can also be used to limit the sliding bearing 6, which is convenient for pressing the sliding bearing 6 into the first hole section 421.

[0122] Please refer to Figure 1 and Figure 7In some embodiments of the present application, the linear motor further comprises a fork assembly 7, the fork assembly 7 is connected with the housing 4, and the fork assembly 7 is arranged opposite to the first mounting hole 42. In this way, the fork assembly 7 can be used to connect other external components, such as wheels, and the movement of the wheels in the sliding direction of the primary unit 11 can be controlled.

[0123] In some embodiments of the present application, the fork assembly 7 has a second connecting structure 71, the second connecting structure 71 is connected to the second end of the slide rail 32, and the secondary unit 21 is located between the second connecting structure 71 and the support ring 33.

[0124] In some embodiments of the present application, the second connecting structure 71 is bonded with the slide rail 32.

[0125] In some embodiments of the present application, the fork assembly 7 further comprises a body 72, the second connecting structure 71 is arranged on a surface of the body 72, and the body 72 is connected with the housing 4.

[0126] In some embodiments of the present application, the primary unit 11 is one of a stator assembly or a rotor assembly, and the secondary unit 21 is the other.

[0127] In some embodiments of the present application, the primary unit 11 is sleeved on the secondary unit 21.

[0128] It should be noted that in the embodiments of the present application, when the primary unit 11 is sleeved on the secondary unit 21, the above-mentioned embodiments still apply and have the same or similar technical effects, which will not be described herein again.

[0129] According to a second aspect of the present application, an actuator is provided, comprising the above-mentioned linear motor. The actuator has all the beneficial effects of the above-mentioned linear motor, which will not be described herein again.

[0130] According to a third aspect of the present application, a suspension system is provided, comprising the above-mentioned actuator. The suspension system has all the beneficial effects of the above-mentioned actuator, which will not be described herein again.

[0131] According to a fourth aspect of the present application, a vehicle is further provided, comprising the above-mentioned suspension system. The vehicle has all the beneficial effects of the above-mentioned suspension system, which will not be described herein again.

[0132] The vehicle can be a fuel automobile, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., which will not be specifically limited herein.

[0133] In the description of the application, the terms "first", "second", "third" and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0134] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0135] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0136] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiment in accordance with the technical essence of the present application without departing from the technical solution content of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A linear motor, characterized in that, include: First institution; The second mechanism is connected to the first mechanism; A guiding mechanism includes a slider and a slide rail. The slider is connected to one of the first mechanism and the second mechanism, and the slide rail is connected to the other of the first mechanism and the second mechanism. The slider cooperates with the slide rail to guide the first mechanism to move relative to the second mechanism along the axial direction of the linear motor.

2. The linear motor according to claim 1, characterized in that, The first mechanism includes a primary unit, and the second mechanism includes a secondary unit, wherein the secondary unit is fitted onto the primary unit.

3. The linear motor according to claim 2, characterized in that, The guiding mechanism includes a slider, which is disposed at one end of the primary unit.

4. The linear motor according to claim 2, characterized in that, The guiding mechanism includes two sliders, which are respectively disposed at both ends of the primary unit.

5. The linear motor according to claim 2, characterized in that, The guiding mechanism includes at least three sliders, two of which are respectively disposed at both ends of the primary unit, and the remaining sliders are disposed between the two sliders and configured to divide the primary unit into multiple segments.

6. The linear motor according to any one of claims 2 to 5, characterized in that, The slider has a first connecting structure protruding on its outer peripheral surface, and the slider is slidably connected to the slide rail through the first connecting structure.

7. The linear motor according to claim 6, characterized in that, Along the radial direction of the linear motor, the cross-section of the first connecting structure is an axisymmetric figure.

8. The linear motor according to claim 6, characterized in that, The slide rail is provided with a first slide groove, which slides in conjunction with the first connecting structure.

9. The linear motor according to claim 2, characterized in that, The slide rail is embedded in the secondary unit.

10. The linear motor according to claim 2, characterized in that, The slide rail passes through the secondary unit radially from the linear motor.

11. The linear motor according to claim 6, characterized in that, The guiding mechanism includes a plurality of slide rails, which are spaced apart circumferentially along the secondary unit. The slider has a plurality of first connecting structures, which are correspondingly arranged with the plurality of slide rails.

12. The linear motor according to claim 11, characterized in that, The slide rail has a first end and a second end opposite to each other, and the guide mechanism further includes a support ring, wherein the first ends of the plurality of slide rails are all connected to the same side of the support ring.

13. The linear motor according to claim 12, characterized in that, The slider is configured such that, when the guide mechanism comprises only one slider, the slider is located at the end of the primary unit away from the support ring.

14. The linear motor according to claim 12, characterized in that, The second mechanism also includes a housing, within which the primary unit, the secondary unit, and the guide mechanism are all disposed.

15. The linear motor according to claim 14, characterized in that, The slide rail is fixedly connected to the housing; and / or, the support ring is fixedly connected to the housing.

16. The linear motor according to claim 14 or 15, characterized in that, A first groove is provided on the inner sidewall of the housing, the first groove extends along the axial direction of the linear motor, and the slide rail is disposed in the first groove.

17. The linear motor according to claim 14 or 15, characterized in that, A second groove is provided on the inner surface of the outer casing near the support ring. The second groove is an annular groove extending circumferentially along the linear motor and is connected to the support ring.

18. The linear motor according to claim 14, characterized in that, The outer casing has a first mounting hole at one end near the support ring, and the diameter of the first mounting hole is smaller than the diameter of the support ring.

19. The linear motor according to claim 18, characterized in that, The first mounting hole includes a first hole segment away from the guide mechanism, and the second mechanism further includes a sliding bearing disposed within the first hole segment.

20. The linear motor according to claim 19, characterized in that, The slider is configured such that, when the guide mechanism includes only one slider, the slider is located at one end of the primary unit away from the support ring, and the sliding bearing is located at the other end of the primary unit.

21. The linear motor according to claim 19, characterized in that, The first mechanism also includes a central rod, and the primary unit, the support ring, and the slider are all sleeved on the central rod.

22. The linear motor according to claim 21, characterized in that, The central rod is fixedly connected to the slider.

23. The linear motor according to claim 21 or 22, characterized in that, A first limiting structure is protruding on the outer circumferential surface of the central rod, and the primary unit is disposed between the slider and the first limiting structure.

24. The linear motor according to claim 23, characterized in that, The outer peripheral surface of the first limiting structure is spaced apart from the slide rail.

25. The linear motor according to claim 21, characterized in that, One of the connecting surfaces of the central rod and the slider with the central rod has a third groove, and the other has a second limiting structure protruding therefrom. The third groove and the second limiting structure are connected in cooperation.

26. The linear motor according to claim 23, characterized in that, The primary unit is located at one end of the central rod.

27. The linear motor according to claim 23, characterized in that, The end of the central rod furthest from the primary unit passes through the first mounting hole.

28. The linear motor according to claim 23, characterized in that, The first mounting hole also includes a second hole section near the guide mechanism, the diameter of which is smaller than the diameter of the first limiting structure.

29. The linear motor according to claim 28, characterized in that, The first hole segment and the second hole segment are connected, the diameter of the first hole segment is larger than the diameter of the second hole segment, and the first hole segment is connected to the sliding bearing.

30. The linear motor according to claim 18, characterized in that, The linear motor also includes a fork arm assembly, which is connected to the housing and is disposed opposite to the first mounting hole.

31. The linear motor according to claim 30, characterized in that, The fork arm assembly has a second connection structure connected to the second end of the slide rail, and the secondary unit is located between the second connection structure and the support ring.

32. The linear motor according to claim 31, characterized in that, The fork arm assembly also includes a body, the second connecting structure is disposed on a surface of the body, and the body is connected to the housing.

33. The linear motor according to claim 2, characterized in that, The primary unit is either a stator assembly or a mover assembly, and the secondary unit is the other.

34. An actuator, characterized in that, Including the linear motor as described in any one of claims 1 to 33.

35. A suspension system, characterized in that, Including the actuator as described in claim 34.

36. A vehicle, characterized in that, Includes the suspension system as described in claim 35.

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