Linear motor and vehicle

Abstract

A linear motor and a vehicle. The linear motor comprises a first assembly, a second assembly and a measurement assembly, the first assembly comprising a first body and a first magnetic member, the second assembly being movably matched with the first assembly in the axial direction, and the second assembly comprising a second body and a second magnetic member. The measurement assembly is used for measuring the displacement of the second assembly relative to the first assembly, and comprises a first measurement member and a second measurement member, the first measurement member being arranged on the first assembly, the second measurement member being arranged on the second assembly, and at least one of the first measurement member and the second measurement member being at least partially located on two sides of the second body respectively.

Description

Linear motors and vehicles

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202311872192.0 and application date December 29, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of vibration reduction technology, and in particular to a linear motor and a vehicle. Background Art

[0004] In related technologies, shock absorbers are usually installed in vehicles to reduce vehicle vibrations, etc. Some shock absorbers use the principle of linear motors to adjust the thrust or damping of the shock absorbers, and detection components are usually provided to detect changes in the length of the linear motors. Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the related art. To this end, the present application proposes a linear motor with a more reasonable layout, which improves the compactness and applicability of the structure.

[0006] The present application also proposes a vibration reduction assembly having the above-mentioned linear motor.

[0007] The present application also provides a vehicle having the above-mentioned vibration reduction assembly.

[0008] According to the linear motor of the first aspect embodiment of the present application, it includes: a first component, the first component includes a first body and a first magnetic part provided on the first body; a second component, the second component is axially movably matched with the first component, the second component includes a second body and a second magnetic part provided on the second body; a detection component, the detection component is used to detect the displacement of the second component relative to the first component, and the detection component includes a first detection part and a second detection part, the first detection part is arranged on the first component, and the second detection part is arranged on the second component, at least part of at least one of the first detection part and the second detection part and the second magnetic part are respectively located on both sides of the second body; one of the first magnetic part and the second magnetic part is a coil, and the other is a permanent magnet or an electromagnet.

[0009] According to the linear motor of the embodiment of the present application, a detection component is provided to include a first detection component and a second detection component to detect the position of the second component relative to the first component, and at least a portion of at least one of the first detection component and the second detection component and the second magnetic component are respectively arranged on both sides of the second body, so that the above-mentioned at least one of the first detection component and the second detection component can avoid the area on the second component that is prone to high temperature, so as to reduce the impact of the high temperature of the second component on the detection component, thereby helping to improve the reliability of the detection component and the reliability of the linear motor.

[0010] In some embodiments, the second body is configured as a shell having a cavity formed therein, the second magnetic component and the first magnetic component are located in the cavity, and the second detection component is located outside the cavity.

[0011] In some embodiments, the first body is formed with a first guide portion, the second body is formed with a second guide portion, the first guide portion is a first guide rod, the second guide portion is a first guide hole, the first detection member is arranged on the first guide rod, and at least a portion of the first detection member is suitable for extending out of the second body through the first guide hole.

[0012] In some embodiments, a first mounting groove is formed on an outer peripheral wall of the first guide rod, and at least a portion of the first detection member is accommodated in the first mounting groove.

[0013] In some embodiments, a second mounting groove is provided on the outer wall of the shell near the first guide hole, and the second mounting groove is used to set the second detection member.

[0014] In some embodiments, in a direction from the end of the shell to the first guide hole, the thickness of at least a portion of the shell gradually decreases, and the second detection member and the second magnetic member are respectively located on the inner and outer sides of the shell.

[0015] In some embodiments, the linear motor further includes: a first guide bearing, wherein one of the first guide rod and the housing is connected to the first guide bearing, and the other of the first guide rod and the housing is slidingly engaged with the first guide bearing.

[0016] In some embodiments, the first guide bearing and the second detection member are both located outside the second body, the first guide bearing is provided on a side of the second detection member facing away from the second body, and the first guide bearing covers at least a portion of the second detection member.

[0017] In some embodiments, the second detecting member is disposed at the first guide hole.

[0018] In some embodiments, the housing at the first guide hole is provided with a first notch, and the first notch is used to set the second detection member.

[0019] In some embodiments, the linear motor also includes: a first guide bearing, the first guide rod and one of the shells are connected to the first guide bearing, and the first guide rod and the other of the shells are slidingly fitted with the first guide bearing; the first guide bearing is formed with a second notch, and the second notch is arranged opposite to the first detection member.

[0020] In some embodiments, the linear motor also includes: a first guide bearing, the first guide rod and one of the shells are connected to the first guide bearing, and the first guide rod and the other of the shells are slidingly fitted with the first guide bearing; the first guide bearing is formed with a second notch, and the second detection member is arranged at the second notch.

[0021] In some embodiments, the first guide rod is formed with a first positioning portion, and the first guide bearing is formed with a second positioning portion, and the second positioning portion is circumferentially positioned and matched with the first positioning portion.

[0022] In some embodiments, a wiring groove is formed on the outer peripheral wall of the first guide rod, and the connecting wire of the first magnetic component is guided to the outside of the second body through the wiring groove.

[0023] In some embodiments, the first body is formed with a third guide portion, the second body is formed with a fourth guide portion, the third guide portion is a second guide hole, the fourth guide portion is a second guide rod, the first body is formed with an avoidance space, the avoidance space is connected to the second guide hole, and the second guide rod is passed through the second guide hole and is suitable for being accommodated in the avoidance space.

[0024] In some embodiments, the first body includes a second guide bearing, which defines the second guide hole and is disposed at an end of the avoidance space away from the first guide portion.

[0025] In some embodiments, the detection component is an electromagnetic induction component.

[0026] In some embodiments, the linear motor further includes: a first buffer and a second buffer, wherein the first buffer and the second buffer are both fixed to the first body, the first buffer is disposed in the second body, and the second buffer is disposed outside the second body.

[0027] In some embodiments, the linear motor further includes: a protective member, which is arranged around the second buffer member, the length of the protective member in the moving direction of the second component is adjustable, and the two ends of the protective member are respectively sealed and connected to the first component and the second component.

[0028] In some embodiments, the linear motor further includes: a first mounting seat, the first mounting seat is fixed to the first component; a second mounting seat, the second mounting seat is fixed to the second component; and a shock-absorbing spring, the shock-absorbing spring is sleeved outside the second buffer member and stopped between the first mounting seat and the second mounting seat.

[0029] According to the second aspect embodiment of the present application, the vehicle includes a body, wheels and a linear motor according to the first aspect embodiment of the present application, wherein one of the first component and the second component is suitable for connecting to the wheel, and the other is suitable for connecting to the body.

[0030] According to the vehicle of the embodiment of the present application, by adopting the above-mentioned linear motor, the arrangement of the linear motor is flexible to a certain extent, which can improve the stability of the vehicle.

[0031] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] FIG1 is a schematic diagram of a linear motor according to an embodiment of the present application;

[0034] FIG2 is a cross-sectional view of the linear motor shown in FIG1 ;

[0035] FIG3 is a cross-sectional view along line AA in FIG2 ;

[0036] FIG4 is a partial schematic diagram of the linear motor shown in FIG2 ;

[0037] FIG5 is a bottom view of the linear motor shown in FIG1 ;

[0038] FIG6 is a partial schematic diagram of a linear motor according to another embodiment of the present application;

[0039] FIG7 is a cross-sectional view of the linear motor shown in FIG6;

[0040] FIG8 is a schematic diagram of the first guide bearing shown in FIG6;

[0041] FIG9 is a schematic diagram of a vehicle according to an embodiment of the present application.

[0042] Reference numerals: Vehicle 200, linear motor 100, central axis L, vehicle body 101, wheel 102, first component 1, first body 11, first guide portion 11a, third guide portion 11b, first positioning portion 11c, wiring groove 11d, avoidance space 11e, first mounting groove 11f, first guide rod 11g, second guide hole 11h, flange 11i, first notch 11j, second guide bearing 111, retaining ring 112, first magnetic member 12, second component 2, second body 21, housing 21F, cavity 210, cylinder 211, first cover plate 212, second cover plate 213, push rod 214, second guide portion 21a, fourth guide portion 21b, second mounting groove 21c, first guide hole 21d, second guide rod 21e, second magnetic member 22, detection assembly 3, first detection member 31, second detection member 32, first guide bearing 4, second positioning portion 4a, second notch 40, first buffer member 61, second buffer member 62, protective member 7, first mounting seat 81, second mounting seat 82, and shock-absorbing spring 83. DETAILED DESCRIPTION

[0043] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0044] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0045] In the related art, the layout of the linear motor often affects the setting of the detection component, making the detection component susceptible to the heat generated by the linear motor during operation.

[0046] In order to solve the above problems, a linear motor 100 according to an embodiment of the present application will be described below with reference to the accompanying drawings.

[0047] As shown in Figures 1 and 2, the linear motor 100 includes a first component 1 and a second component 2. The first component 1 includes a first body 11 and a first magnetic member 12 provided on the first body 11. The second component 2 is axially movable with the first component 1. The second component 2 includes a second body 21 and a second magnetic member 22 provided on the second body 21. Among them, one of the first magnetic member 12 and the second magnetic member 22 is a coil, and the other is a permanent magnet (e.g., a magnet steel) or an electromagnet (e.g., an electromagnetic coil).

[0048] It should be noted that, in the description of this application, "axial" refers to the axial direction of the linear motor 100, the axial direction of the first component 1 or the axial direction of the second component 2, and refers to the extension direction of the dot-dash line L in Figure 2. The dot-dash line L is the central axis of the linear motor 100, and is also the central axis of the first component 1 and the second component 2; in the following description, "radial" refers to the radial direction of the linear motor 100, the radial direction of the first component 1 or the radial direction of the second component 2, and refers to the direction passing through the central axis of the linear motor 100 on the radial plane of the linear motor 100. The radial plane is perpendicular to the axial direction, and the "radial" is perpendicular to the "axial". The "axial" refers to the circumferential direction of the linear motor 100, the circumferential direction of the first component 1 or the circumferential direction of the second component 2, and refers to the direction around the central axis L of the linear motor 100. The "axial" is perpendicular to the "radial" and "circumferential" respectively.

[0049] It is understandable that when the second component 2 moves relative to the first component 1 axially, the first magnetic component 12 and the second magnetic component 22 cooperate to enable the linear motor 100 to output a vibration-damping force, thereby achieving the vibration-damping effect of the linear motor 100 on the vehicle 200 . Exemplarily, the first magnetic member 12 is a coil, and the second magnetic member 22 is a permanent magnet. When the first magnetic member 12 is energized, it generates a magnetic field. The magnetic field formed by the first magnetic member 12 after energization interacts with the magnetic field of the second magnetic member 22 to generate a force, so that the second component 2 has a tendency to move axially relative to the first component 1, that is, it forms the thrust or damping of the linear motor 100. Therefore, when the linear motor 100 is used in a vehicle, the linear motor 100 can change the height of the vehicle body 101 relative to the wheel 102 to adjust the posture of the entire vehicle body, thereby ensuring that the vehicle 200 is traveling in a suitable posture; at this time, the current size and direction of the first magnetic member 12 can be changed to change the magnetic field strength and magnetic field direction of the first magnetic member 12, so as to change the force between the first component 1 and the second component 2, thereby adjusting the thrust of the linear motor 100 and changing the damping of the linear motor 100, thereby achieving the lifting or lowering of the posture of the entire vehicle, and at the same time playing a vibration reduction role; of course, the first magnetic member 12 can also be a permanent magnet, and the second magnetic member 22 can be a coil. For example, the vehicle 200 has multiple linear motors 100, which are respectively installed on different wheels 102. The multiple linear motors 100 can be independently controlled to adjust the body posture of one side of the vehicle 200 (for example, raising or lowering the height of one side of the vehicle 200).

[0050] For example, if the axial direction of the linear motor 100 is in the vertical direction, that is, the second component 2 and the first component 1 can be movably matched in the vertical direction, the first component 1 is directly or indirectly connected to the vehicle body 101, and the second component 2 is directly or indirectly connected to the wheel 102. In this case, a portion of the first component 1 can be located above the second component 2; or the first component 1 is directly or indirectly connected to the wheel 102, and the second component 2 is directly or indirectly connected to the vehicle body 101. In this case, a portion of the first component 1 can be located below the second component 2. The second component 2 and the first component 1 can be movably matched to adjust the axial length of the linear motor 100, thereby adjusting the vehicle body posture, thereby adapting to different driving conditions of the vehicle 200 and maintaining the stability of the vehicle 200.

[0051] As shown in Figure 2, the linear motor 100 also includes a detection component 3, which is used to detect the displacement of the second component 2 relative to the first component 1; the detection component 3 includes a first detection member 31 and a second detection member 32, the first detection member 31 is arranged on the first component 1, and the second detection member 32 is arranged on the second component 2, then when the first component 1 and the second component 2 move relative to each other in the axial direction, the first detection member 31 and the second detection member 32 also move relative to each other in the axial direction to detect the displacement of the second component 2 relative to the first component 1. Among them, at least a part of at least one of the first detection part 31 and the second detection part 32 and the second magnetic part 22 are respectively located on both sides of the second body 21; since a higher temperature is usually generated around the second magnetic part 22 during the operation of the linear motor 100, by arranging at least a part of at least one of the first detection part 31 and the second detection part 32 and the second magnetic part 22 on both sides of the second body 21, it is convenient for the above-mentioned at least one of the first detection part 31 and the second detection part 32 to avoid the area on the second component 2 that is prone to high temperature, and at the same time it is beneficial to dissipate heat through natural wind, etc., which is beneficial to achieve cooling of the above-mentioned at least one of the first detection part 31 and the second detection part 32, and is beneficial to improving the reliability of the detection component 3.

[0052] For example, at least a portion of at least one of the first detection component 31 and the second detection component 32 is located outside the second body 21, and the second magnetic component 22 is located inside the second body 21; or, at least a portion of at least one of the first detection component 31 and the second detection component 32 is located inside the second body 21, and the second magnetic component 22 is located outside the second body 21; of course, in other examples, at least a portion of at least one of the first detection component 31 and the second detection component 32 and the second magnetic component 22 can also be located on opposite sides of the second body 21 in other directions.

[0053] Furthermore, it is understood that when at least a portion of at least one of the first detection member 31 and the second detection member 32 is disposed outside the second body 21, the detection assembly 3 occupies less space within the second body 21, facilitating rational utilization of the space within the second body 21. Furthermore, the linear motor 100 does not excessively increase the space within the second body 21 due to the provision of the detection assembly 3. In this application, "disposed outside the second body 21" refers to being disposed outside the cavity 210 formed within the second body 21, with inside and outside referring to the housing separating the second body 21. When the detection assembly 3 is a magnetic induction detection assembly, the magnetic field sensing element is disposed outside the second body 21. That is, the first magnetic member 12 and the second magnetic member 22 disposed within the second body 21 are separated from the magnetic field sensing element disposed outside the second body 21 by the second body 21. This protects the magnetic field sensing element from interference from the magnetic field of the first magnetic member 12 and the second magnetic member 22, thereby facilitating improved detection accuracy of the detection assembly 3. For example, the second body 21 is a non-magnetic conductive member, such as aluminum.

[0054] Exemplarily, the detection component 3 is a non-contact detection component or a contact detection component; for example, when the detection component 3 is a non-contact detection component, the detection component 3 can be a grating detection component, the first detection component 31 is a grating scale bar, and the second detection component 32 is a grating sensor (as shown in Figure 2), or the first detection component 31 is a grating sensor, and the second detection component 32 is a grating scale bar; when the detection component 3 is a contact detection component, the detection component 3 can be a resistive detection component, the first detection component 31 is a resistive scale bar, and the second detection component 32 is a resistive sensor or a current sensor, or the first detection component 31 is a resistive sensor or a current sensor, and the second detection component 32 is a resistive scale bar. Alternatively, the detection component 3 may be a magnetic induction detection component, wherein the first detection member 31 is a magnetic field generating element and the second detection member 32 is a magnetic field sensing element. Alternatively, the second detection member 32 is a magnetic field generating element and the first detection member 31 is a magnetic field sensing element, such as a Hall sensor. The displacement detection principles of grating detection components, resistive detection components, and magnetic induction detection components are well known to those skilled in the art and will not be described in detail here. Of course, the type of detection component 3 is not limited to this.

[0055] According to the linear motor 100 of the embodiment of the present application, a detection component 3 is provided to include a first detection member 31 and a second detection member 32 to detect the position of the second component 2 relative to the first component 1, and at least a portion of at least one of the first detection member 31 and the second detection member 32 and the second magnetic member 22 are respectively arranged on both sides of the second body 21, so that at least one of the first detection member 31 and the second detection member 32 can avoid the area on the second component 2 where high temperature is easily generated, so as to reduce the influence of the high temperature of the second component 2 on the detection component 3, thereby facilitating the improvement of the reliability of the detection component 3 and the improvement of the reliability of the linear motor 100.

[0056] Exemplarily, the detection component 3 may be a displacement sensor or a position sensor, etc.

[0057] In the embodiment of the present application, the second body 21 can be used to accommodate at least a portion of the first magnetic component 12 and at least a portion of the second magnetic component 22, so that the second body 21 can play a certain protective role for the above-mentioned at least portion of the first magnetic component 12 and the above-mentioned at least portion of the second magnetic component 22; for example, a sliding cavity 210 is defined in the second body 21, and at least a portion of the first magnetic component 12 and at least a portion of the second magnetic component 22 are arranged in the sliding cavity 210. It can be understood that since the first component 1 and the second component 2 are movably matched in the axial direction, the relative position of the second body 21 and the first magnetic part 12 in the axial direction can change, and the part of the first magnetic part 12 accommodated in the second body 21 can change with the relative movement of the first component 1 and the second component 2. For example, within the entire range of relative movement of the first component 1 and the second component 2, a part of the first magnetic part 12 is always accommodated in the second body 21; and the second magnetic part 22 is arranged in the second body 21. For example, the second magnetic part 22 is fixed to the second body 21, and the part of the second magnetic part 22 accommodated in the second body 21 will not change with the relative movement of the first component 1 and the second component 2. Within the entire range of relative movement of the first component 1 and the second component 2, a part of the second magnetic part 22 or the entire second magnetic part 22 is accommodated in the second body 21.

[0058] In some embodiments, as shown in FIG2 , the second body 21 is configured as a housing 21F having a cavity 210 formed therein. The second magnetic member 22 and the first magnetic member 11 are located within the cavity 210, and the second detection member 32 is located outside the cavity 210. During operation of the linear motor 100, a relatively high temperature is typically generated within the housing 21F. Positioning the second detection member 32 outside the cavity 210 allows the second detection member 32 to avoid areas within the housing 21F that are prone to high temperatures, while also allowing the second detection member 32 to dissipate heat through natural air.

[0059] In some embodiments, as shown in FIG2 , at least a portion of the first body 11 is housed within the second body 21. A first guide portion 11a is formed at one axial end of the first body 11, and a second guide portion 21a is formed at the second body 21. The first guide portion 11a and the second guide portion 21a cooperate to guide the movement direction of the second component 2. Alternatively, a third guide portion 11b is formed at the other axial end of the first body 11, and a fourth guide portion 21b is formed at the second body 21. The third guide portion 11b and the fourth guide portion 21b cooperate to guide the movement direction of the second component 2.

[0060] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0061] It can be seen that the cooperation between the first guide portion 11a and the second guide portion 21a, and / or the cooperation between the third guide portion 11b and the fourth guide portion 21b, is conducive to improving the stability of the relative movement of the first component 1 and the second component 2 in the axial direction. At the same time, there is no need to guide the moving direction of the second component 2 through the first magnetic part 12 and / or the second magnetic part 22. The surface of the first magnetic part 12 and the surface of the second magnetic part 22 do not need to be set to a higher flatness, so as to reduce the processing difficulty and assembly difficulty of the first magnetic part 12 and the second magnetic part 22.

[0062] It can be understood that when the first guide portion 11a and the third guide portion 11b are respectively formed at the two axial ends of the first body 11, secondary positioning and guiding of the linear motor 100 can be achieved, so that multiple positioning and guiding can be formed between the first component 1 and the second component 2, so as to improve the relative movement smoothness of the first component 1 and the second component 2, and at the same time facilitate to ensure the working air gap between the second component 2 and the first component 1, especially the radial working air gap between the second component 2 and the first component 1, thereby improving the stability and reliability of the linear motor 100; at this time, the first guide portion 11a and the third guide portion 11b can be arranged at intervals along the axial direction.

[0063] Taking the axial direction of the linear motor 100 as the up and down direction as an example, the upper end of the first body 11 is formed with a first guide portion 11a, and / or the lower end of the first body 11 is formed with a third guide portion 11b, or the lower end of the first body 11 is formed with a first guide portion 11a, and / or the upper end of the first body 11 is formed with a third guide portion 11b.

[0064] Exemplarily, the first guide portion 11a is the first guide rod 11, and the second guide portion 21a is the first guide hole 21d; and / or, the third guide portion 11b is the second guide hole 11h, and the fourth guide portion 21b is the second guide rod 21e.

[0065] In some embodiments, as shown in FIG2 , the second body 21 defines a cavity 210, the second magnetic member 22 is disposed on the inner wall of the cavity 210, the first body 11 extends into the cavity 210, and at least a portion of the first magnetic member 12 is disposed within the cavity 210. When the linear motor 100 is operating normally, the first magnetic member 12 and the second magnetic member 22 move relative to each other. The second magnetic member 22 cuts through the magnetic lines of force, causing the linear motor 100 to generate a corresponding damping force. The damping force of the vibration reduction system can be controlled by adjusting the current of the first magnetic member 12.

[0066] Illustratively, the first magnetic component 12 is entirely disposed within the cavity 210 except for its outgoing wires; alternatively, during relative movement between the second component 2 and the first component 1 , a portion of the first magnetic component 12 may extend out of the cavity 210 to achieve good heat dissipation of the first magnetic component 12 .

[0067] In some embodiments, as shown in Figure 2, the first body 11 is formed with a first guide portion 11a, and the second body portion 21 is formed with a second guide portion 21a. The first guide portion 11a is a first guide rod 11g, and the second guide portion 21a is a first guide hole 21d. The first detection member 31 is arranged on the first guide rod 11g, and at least a portion of the first detection member 31 is suitable for extending out of the second body 21 through the first guide hole 21d to reduce the impact of the high temperature inside the second body 21 on the first detection member 31, and at the same time is conducive to reducing the occupation of the internal space of the second body 21 by the first detection member 31. At the same time, the above-mentioned installation of the first detection member 31 can reduce the requirements for the axial position of the first detection member 31. That is, in the process of the second component 2 moving relative to the first component 1, the first detection member 31 is suitable for being passed through the first guide hole 21d, so as to reduce the axial arrangement space required for the linear motor 100 to provide for the arrangement of the detection component 3, thereby facilitating the arrangement of the detection component 3.

[0068] For example, a cavity 210 is defined in the second body 21, and a first guide hole 21d is formed at one axial end of the cavity 210. The first guide hole 21d axially penetrates the cavity wall of the cavity 210, and the first guide rod 11g is passed through the first guide hole 21d, and a part of the first guide rod 11g extends to the outside of the second body 21 through the first guide hole 21d; during the axial relative movement of the first component 1 and the second component 2, the first detection member 31 is configured so that a part of the first detection member 31 is suitable for extending out of the second body 21 through the first guide hole 21d, or the first detection member 31 is configured to switch between a first state and a second state, and in the first state, a part of the first detection member 31 is suitable for extending out of the second body 21 through the first guide hole 21d, and in the second state, the entire first detection member 31 is suitable for extending out of the second body 21 through the first guide hole 21d.

[0069] In some embodiments, as shown in Figures 2 and 3, the outer peripheral wall of the first guide rod 11g is formed with a first mounting groove 11f. The first mounting groove 11f can be formed by a portion of the outer peripheral wall of the first guide rod 11g being recessed radially inward, and at least a portion of the first detection member 31 is accommodated in the first mounting groove 11f. Exemplarily, the first detection member 31 is provided on a side of the first mounting groove 11f away from the peripheral wall of the first guide hole 21d. Thus, by providing the first mounting groove 11f, the provision of the first detection member 31 does not affect the cooperation between the first guide rod 11g and the first guide hole 21d, and the first detection member 31 is also not easily scratched.

[0070] In some embodiments, as shown in Figures 2 and 3, a second mounting groove 21c is provided on the outer wall of the housing 21F near the first guide hole 21d, and the second mounting groove 21c is used to set the second detection member 32; it can be seen that the outer surface of the second body 21 is formed with a second mounting groove 21c, and the second mounting groove 21c passes through the peripheral wall of the first guide hole 21d. Then, the second mounting groove 21c can be formed by a portion of the peripheral wall of the first guide hole 21d being recessed radially outward, and at least a portion of the second detection member 32 is accommodated in the second mounting groove 21c. Exemplarily, the second detection member 32 is provided on the side groove wall of the second mounting groove 21c away from the first guide rod 11g. Thus, by providing the second mounting groove 21c, it is easy to ensure that the setting of the second detection member 32 does not affect the cooperation between the first guide rod 11g and the first guide hole 21d. At the same time, the above-mentioned installation of the second detection member 32 is conducive to making the second body 21 provide a suitable layout space for the second detection member 32, which is convenient for reducing the axial occupied space of the linear motor 100.

[0071] It can be seen that in the above technical solution, the side of the second mounting groove 21c facing away from the cavity 210 and the side of the second mounting groove 21c facing the first guide rod 11g are both open, and the second detection member 32 is exposed to the open side of the second mounting groove 21c to facilitate the installation of the second detection member 32.

[0072] For example, as shown in Figure 2, in the radial direction, the distance between the second detection member 32 and the central axis L of the linear motor 100 is smaller than the distance between the second magnetic member 22 and the central axis L of the linear motor 100, and in the plane perpendicular to the axial direction, the orthographic projection of the second detection member 32 is located within the outer contour of the orthographic projection of the second magnetic member 22, so that the radial space occupied by the linear motor 100 will not be excessively increased due to the setting of the detection component 3.

[0073] In some embodiments, as shown in Figure 2, in the direction from the end of the shell 21F to the first guide hole 21d (which can be understood as the radial direction of the second body 21), the thickness of at least part of the shell 21F gradually decreases, and the second detection member 32 and the second magnetic member 22 are respectively located on the inner and outer sides of the shell 21F; at this time, the second detection member 32 can be arranged at the part of the shell 21F where the thickness gradually decreases, so as to better utilize the space provided by the shell 21F to facilitate the arrangement of the second detection member 32 and save the space occupied by the linear motor 100.

[0074] In the example of Figure 2, the thickness of the part of the shell 21F that forms the second mounting groove 21c gradually decreases from the outside to the inside along the radial direction of the second body 21, so that the depth of the second mounting groove 21c in the axial direction of the second body 21 gradually increases from the outside to the inside along the radial direction of the second body 21, so as to provide an arrangement space for the second detection member 32 while facilitating the reliable cooperation between the second detection member 32 and the first detection member 31.

[0075] In some embodiments, as shown in Figure 2, the linear motor 100 also includes a first guide bearing 4, the first guide rod 11g is connected to one of the first guide bearings 4 of the housing 21F, and the first guide rod 11g is slidingly fitted with the other first guide bearing 4 of the housing 21F. The first guide bearing 4 can guide the movement direction of the second component 2 relative to the first component 1, thereby improving the movement stability of the second component 2 relative to the first component 1.

[0076] In the example of FIG2 , the first guide bearing 4 is fixedly connected to the housing 21F and is slidably engaged with the first guide rod 11. The first guide bearing 4 is disposed at the first guide hole 21d, and the first guide bearing 4, the second body 21, and the second detection member 32 can remain relatively stationary. The first guide rod 11g is disposed through the first guide bearing 4. The first guide bearing 4 and the first guide rod 11g can guide the movement direction of the second component 2 relative to the first component 1. In other examples, the first guide bearing 4 is slidably engaged with the housing 21F and is fixedly connected to the first guide rod 11g.

[0077] In some embodiments, as shown in FIG2 , the second detecting member 32 is located outside the second body 21, that is, the second detecting member 32 is located outside the cavity 210, so that the second detecting member 32 has a larger operating space when it is installed, thereby improving the installation convenience of the second detecting member 32, and the portion of the first body 11 located in the second body 21 will not collide with the second detecting member 32 when it moves relative to the second body 21 in the cavity 210; wherein, the first guide bearing 4 is also located outside the second body 21, that is, the first guide bearing 4 is located outside the cavity 210, the first guide bearing 4 is provided on the side of the second detecting member 32 away from the second body 21, and the first guide bearing 4 covers at least part of the second detecting member 32, then perpendicular to the axial direction (that is, perpendicular to the second component 2 relative to the second component 2). On the plane (moving direction of the first component 1), at least part of the orthographic projection of the second detection member 32 is located within the orthographic projection range of the first guide bearing 4. Then, when the second component 2 moves relative to the first component 1, the part of one of the first body 11 and the second body 21 outside the cavity 210, or the part outside the cavity 210 connected to one of the first body 11 and the second body 21 (such as the first buffer member 61 described later, etc.), no matter which of the above parts moves relative to the cavity 210 outside the cavity 210, can be separated by the first guide bearing 4 to avoid any of the above two parts colliding with the second detection member 32, thereby achieving effective protection for the second detection member 32 and improving the reliability of the second detection member 32. In addition, in the above scheme, the first guide bearing 4 will not block the first detection member 31 and the second detection member 32, thereby avoiding the first guide bearing 4 blocking the second detection member 32 and affecting the detection accuracy.

[0078] For example, in the example of FIG2 , the second component 2 and the first component 1 move up and down in coordination, the first guide hole 21d is formed on the top wall of the cavity 210, the second detection member 32 is fixedly mounted on the upper side of the top wall, and the first guide bearing 4 is fixedly mounted on the top wall and located on the upper side of the second detection member 32, so that the first guide bearing 4 covers at least a portion of the upper side of the second detection member 32. Of course, in other examples, the first guide hole 21d can also be formed on the bottom wall of the cavity 210, the second detection member 32 is fixedly mounted on the lower side of the bottom wall, and the first guide bearing 4 is fixedly mounted on the bottom wall and located on the lower side of the second detection member 32.

[0079] For example, in the example of Figure 2, the peripheral wall of the first guide hole 21d is formed with a second mounting groove 21c, and the second detection member 32 is provided on the side wall of the second mounting groove 21c away from the first guide rod 11g, and the side of the second mounting groove 21c away from the cavity 210 is open, so that the second detection member 32 is located outside the cavity 210, which is convenient for the installation of the second detection member 32. At the same time, it is beneficial for the first body 11 and the second body 21 to provide a suitable arrangement space for the second detection member 32, thereby reducing the axial space occupied by the linear motor 100, and also helping to reduce the axial distance between the first guide bearing 4 and the cavity wall of the cavity 210 in which the first guide hole 21d is formed, thereby facilitating the connection between the first guide bearing 4 and the above-mentioned cavity and improving the installation convenience of the first guide bearing 4. Of course, if the second body 21 can also be provided with no second mounting groove 21c, the second detection member 32 can be provided on the outside of the cavity wall of the cavity 210 in which the first guide hole 21d is formed, so that the second detection member 32 is located outside the cavity 210.

[0080] In some embodiments, as shown in FIG2 , the second detection member 32 is disposed at the first guide hole 21 d, and the second detection member 32 is disposed outside the cavity 210. This ensures reliable cooperation between the second detection member 32 and the first detection member 31 while also reducing the impact of high temperature inside the second body 21 on the second detection member 31, thereby reducing the space occupied by the second detection member 32 inside the second body 21 and facilitating the arrangement of the detection assembly 3. Of course, in other embodiments of the present application, the second detection member 32 may also be disposed inside the second body 21, or the second detection member 32 may be disposed inside the first guide hole 21 d.

[0081] It can be seen that in the embodiment of the present application, under the premise that the first detection member 31 and the second detection member 32 are reliably matched to detect the displacement of the second component 2 relative to the first component 1, and the first guide rod 11g and the first guide hole 21d are reliably matched to guide the movement direction of the second component 2, the space at the first guide rod 11g and the first guide hole 21d can be reasonably utilized to arrange the detection component 3, which is conducive to reducing the radial occupation of the internal space of the second body 21 by the detection component 3, and is convenient for making the setting of the detection component 3 not affect the cooperation between the first magnetic component 12 and the second magnetic component 22. Obviously, compared with some technologies that do not leave out the structural design of the detection component, the present application is conducive to achieving accurate control by setting up the detection component 3, and at the same time makes comprehensive considerations for the layout of the detection component 3, which has practical process feasibility.

[0082] In some embodiments, as shown in Figures 6 to 8, the shell 21F at the first guide hole 21d is provided with a first notch 11j, and the first notch 11j is used to set the second detection member 32, so that the second detection member 32 can be set relative to the first magnetic member 31, thereby avoiding the shell 21F at the first guide hole 21d from blocking the second detection member 32 and affecting the detection accuracy.

[0083] Exemplarily, the first notch 11j is arranged opposite to the first detection member 31, and the second detection member 32 is arranged at the first notch 11j and exposed to the shell 21F, so that the portion of the shell 21F at the first guide hole 21d can be jointly enclosed with the second detection member 32 on the outer periphery of the first guide rod 11g, thereby realizing reliable cooperation between the first detection member 31 and the second detection member 32; at this time, the second detection member 32 can be exposed in the first notch 11j, so that the second detection member 32 is arranged outside the cavity 210.

[0084] In some embodiments, as shown in Figures 6-8, the linear motor 100 also includes a first guide bearing 4, a first guide rod 11g is connected to one of the first guide bearings 4 of the housing 21F, and the first guide rod 11g is slidably fitted with the other first guide bearing 4 of the housing 21F, so that the first guide bearing 4 can guide the movement direction of the second component 2 relative to the first component 1, thereby improving the movement stability of the second component 2 relative to the first component 1; the first guide bearing 4 is formed with a second notch 40, and the second notch 40 is arranged opposite to the first detection part 31, so the second notch 40 is arranged opposite to the first notch 11j, and the second notch 40 is also arranged opposite to the second detection part 32, and the second detection part 32 is arranged radially outside the second notch 40, and the first detection part 31 is arranged radially inside the second notch 40, so that the second detection part 32 can be arranged opposite to the detection part 31, thereby avoiding the first guide bearing 4 blocking the second detection part 32 and affecting the detection accuracy.

[0085] It is understandable that, in the above solution, the position of the first guide bearing 4 relative to the second body 21 is relatively flexible. The first guide bearing 4 can be arranged outside the second body 21 or at least partially inside the second body 21 .

[0086] For example, in the examples of Figures 6 to 8, the housing 21F at the first guide hole 21d is provided with an annular flange 11i, the flange 11i is arranged around the first guide rod 11g, the first guide bearing 4 is arranged on the inner side of the flange 11i, and the flange 11i is formed with a first notch 11j, the first notch 11j is arranged opposite to the second notch 40, and the second detection member 32 is connected to the first notch 11j. In this way, the second detection member 32 can be connected to the first guide hole 21d of the second body 21. Since the second notch 40 is arranged opposite to the first detection member 31 and the first notch 11j is arranged opposite to the second notch 40, the first notch 11j is also arranged opposite to the first detection member 31, and the second detection member 32 is connected to the first notch 11j. This can also achieve the relative arrangement between the first detection member 31 and the second detection member 32, so that there is good alignment between the two.

[0087] It can be understood that, in the embodiment of the present application, when the linear motor 100 includes the first guide bearing 4 , the second detection member 32 can be connected to at least one of the first guide bearing 4 and the second body 21 .

[0088] In some other embodiments, the linear motor 100 includes a first guide bearing 4, a first guide rod 11g is connected to one of the first guide bearings 4 of the housing 21F, and the first guide rod 11g is slidably fitted with the other first guide bearing 4 of the housing 21F; the first guide bearing 4 is formed with a second notch 40, and the second detection member 32 is arranged at the second notch 40, so as to facilitate the second detection member 32 to be exposed to the first guide bearing 4, and at the same time, the first guide bearing 4 will not be blocked between the first detection member 31 and the second detection member 32 to affect the detection accuracy; at this time, the second detection member 32 can be connected to the first guide bearing 4. For example, if the first guide bearing 4 is arranged outside the cavity 210, it is convenient for the second detection member 32 to be arranged outside the cavity 210.

[0089] In some embodiments, as shown in Figures 3 and 4, the first guide rod 11g is formed with a first positioning portion 11c, and the first guide bearing 4 is formed with a second positioning portion 4a. The second positioning portion 4a is circumferentially positioned and matched with the first positioning portion 11c so that the first detection member 31 and the second detection member 32 are radially opposite to each other, thereby achieving reliable matching of the first detection member 31 and the second detection member 32.

[0090] For example, as shown in Figures 3 and 4, the first positioning portion 11c is formed as a positioning groove, and the second positioning portion 4a is formed as a positioning through-hole. The positioning member is provided in the positioning through-hole and is suitable for positioning and cooperating with the positioning groove so that the positioning groove and the positioning through-hole are arranged in a radially opposite relationship, thereby achieving circumferential positioning of the second component 2 and the first component 1 during assembly, and at the same time facilitating the precise alignment of the first detection member 31 with the second detection member 32 to achieve the detection function of the detection component 3; it is understandable that the axial length of the positioning groove can be specifically set according to actual needs. For example, the positioning member is a positioning pin, etc.

[0091] In some embodiments, as shown in Figures 2-4, a wiring groove 11d is formed on the outer wall of the first guide rod 11g, and the connecting wire of the first magnetic component 12 is guided to the outside of the second body 21 through the wiring groove 11d, so as to facilitate the output of the first magnetic component 12, and the output of the first magnetic component 12 will not interfere with the cooperation between the first guide rod 11g and the first guide hole 21d, and the second component 2 will not cause wear on the output of the first magnetic component 12 when it moves relative to the first component 1.

[0092] It can be seen that the wiring groove 11d can be formed by a part of the outer peripheral wall of the first guide rod 11g being recessed radially inward, so that a gap is formed between the first guide rod 11g and the peripheral wall of the first guide hole 21d, so as to arrange the wiring of the first magnetic part 12. At the same time, the wiring of the first magnetic part 12 does not need to be passed through the first guide rod 11g when arranging it. It is only necessary to place the wiring of the first magnetic part 12 in the wiring groove 11d, which improves the convenience and reliability of the wiring arrangement.

[0093] In some embodiments, as shown in FIG2 , the first body 11 is formed with a third guide portion 11b and the second body 21 is formed with a fourth guide portion 21b. The third guide portion 11b is a second guide hole 11h, and the fourth guide portion 21b is a second guide rod 21e. The second guide rod 21e is disposed in and slidably engages with the second guide hole 11h. The first body 11 is formed with a relief space 11e, which is in communication with the second guide hole 11h and is adapted to be accommodated within the relief space 11e. The relief space 11e provides space for the second guide rod 21e to move, and the peripheral wall of the relief space 11e does not need to guide the second guide rod 21e. For example, if the peripheral wall of the relief space 11e is spaced from the outer peripheral wall of the second guide rod 21e, while ensuring reliable engagement between the second guide hole 11h and the second guide rod 21e, the axial length of the second guide hole 11h can be appropriately reduced, thereby simplifying the manufacturing process.

[0094] It is understood that the axial position of the second guide hole 11h relative to the escape space 11e can be specifically configured based on actual needs. For example, in the example of Figure 2 , the second guide hole 11h is located at the end of the escape space 11e that is away from the first guide portion 11a. This facilitates machining the peripheral wall of the second guide hole 11h and helps to appropriately increase the axial distance between the first guide portion 11a and the second guide hole 11h, thereby enhancing the guiding effect on the movement of the second component 2 relative to the first component 1. Of course, the second guide hole 11h can also be located at other locations such as the middle of the escape space 11e in the axial direction.

[0095] In some embodiments, as shown in Figure 2, the first body 11 includes a second guide bearing 111, and the second guide bearing 111 defines a second guide hole 11h. The second guide rod 21e is passed through the second guide bearing 111 and slidably engages with the second guide bearing 111; the second guide bearing 111 is arranged at the end of the avoidance space 11e away from the first guide portion 11a, which facilitates the installation and fixation of the second guide bearing 111, and is also conducive to appropriately increasing the axial distance between the first guide portion 11a and the second guide hole, thereby enhancing the guiding effect of the movement of the second component 2 relative to the first component 1.

[0096] For example, the first body 11 includes a main body portion and a second guide bearing 111. The main body portion defines an escape space 11e. The second guide bearing 111 is fixedly disposed in the escape space 11e, and at least a portion of the second guide bearing 111 can be located within the escape space 11e. The second guide bearing 111 can be fixed to the peripheral wall of the escape space 11e via a retaining ring 112. In this case, retaining rings 112 are provided on both axial sides of the second guide bearing 111 to limit the axial position of the second guide bearing 111.

[0097] In some embodiments, the detection component 3 is an electromagnetic induction component, for example, the first detection component 31 is a magnetic field generating element, and the second detection component 32 is a magnetic field sensing element, or the second detection component 32 is a magnetic field generating element and the first detection component 31 is a magnetic field sensing element, such as a Hall sensor, a magnetoresistive sensor, etc.; one of the first detection component 31 and the second detection component 32 is used to sense the magnetic field of the other.

[0098] For example, when second component 2 reciprocates relative to first component 1, the magnetic field sensing element reciprocates relative to the magnetic field generating element, causing the relative positions of the magnetic field sensing element and the magnetic field generating element to change, thereby changing the magnetic field strength at each position. The magnetic field sensing element senses the change in magnetic field strength and generates a magnetic field signal, which is converted into an electrical signal. The electrical signal can then be converted into a digital signal or an analog signal to obtain the displacement change of second component 2 relative to first component 1. This displacement change is used to adjust the vibration damping force output by linear motor 100, thereby achieving a better vibration damping effect on vehicle 200.

[0099] This avoids the high alignment requirements between the grating guide and the grating scanning head required when using a grating sensor to detect the aforementioned displacement changes. This also prevents the problem of misalignment between the grating guide and the grating scanning head, which could result from the second component 2 shifting relative to the first component 1. This in turn could lead to inaccurate displacement detection and an inability to output the corresponding vibration-damping force through the linear motor device. Furthermore, the magnetic field sensing and generating elements have low requirements for the application environment, and impurities such as oil and dust have little effect on the magnetic field. This provides excellent reliability and detection accuracy, thereby enhancing the vibration-damping effect of the linear motor 100.

[0100] In some embodiments, as shown in Figure 2, the linear motor 100 also includes a first buffer 61, which is fixed to the first body 11 and is located inside the second body 21. Before the first component 1 and the second component 2 are assembled, the first buffer 61 can be first fixed to the first body 11, and then the first component 1 and the second component 2 are assembled, so that the first buffer 61 is located inside the second body 21, which facilitates the installation of the first buffer 61; the linear motor 100 also includes a second buffer 62, which is fixed to the first body 11 and is located outside the second body 21.

[0101] In addition, the provision of the first buffer 61 can limit the maximum axial length of the linear motor 100, reducing collisions between the second component 2 and the first component 1, thereby reducing damage to the second component 2 and the first component 1, and providing a position-limiting protective function. The provision of the second buffer 62 can limit the minimum axial length of the linear motor 100, similarly reducing collisions between the second component 2 and the first component 1, reducing damage to the second component 2 and the first component 1, and providing a position-limiting protective function. For example, the first buffer 61 and the second buffer 62 are rubber components, etc.

[0102] For example, the linear motor 100 also includes a first guide bearing 4 and a second buffer 62. The first guide bearing 4 is fixed to the second body 21. The first guide bearing 4 is arranged at the first guide hole 21d and slides with the first guide rod 11g. The first guide bearing 4 and the second detection member 32 are both located outside the second body 21. The second buffer 62 is fixed to the first body 11 and is located outside the second body 21; wherein, the first guide bearing 4 is located between the second buffer 62 and the second detection member 32 to separate the second buffer 62 and the second detection member 32 to protect the second detection member 32 from being squeezed by the first buffer 61.

[0103] In the example of FIG2 , a first guide portion 11a is formed at one axial end of the first body 11, and the first buffer 61 and the second buffer 62 are both arranged around the first guide portion 11a. The first guide portion 11a is formed as a first guide rod 11g, and the second buffer 62 is arranged on the outer peripheral side of the first guide rod 11g. The second body 21 is formed with a second guide portion 21a, and the second guide portion 21a is formed as a first guide hole 21d. The axial direction is the up-down direction, and the first guide hole 21d is formed on the top wall of the cavity 210. The second detection member 32 is fixed at the first guide hole 21d, and the second detection member 32 is arranged outside the cavity 210. The first buffer member 61 and the first guide rod 11g remain relatively stationary. At this time, a first guide bearing 4 can be provided between the first buffer member 61 and the second detection member 32 to separate the first buffer member 61 and the second detection member 32, so that the first guide bearing 4 can protect and block the second detection member 32 to protect the second detection member 32 from being squeezed by the first buffer member 61 when the linear motor 100 is running.

[0104] In some embodiments, as shown in Figures 1 and 2, the linear motor 100 further includes a protective member 7, which is arranged around the second buffer member 62, and the two ends of the protective member 7 are respectively sealed with the first component 1 and the second component 2, so that the protective member 7, the first component 1 and the second component 2 define a sealed cavity, and the second buffer member 62 is arranged in the sealed cavity to achieve dustproof and waterproof settings of the second buffer member 62, so as to enhance the protection capability of the linear motor 100, so that the linear motor 100 can be used in harsh environmental scenarios, which is conducive to improving the applicability and service life of the linear motor 100, so that the linear motor 100 can operate reliably for a long time. Among them, the length of the protective member 7 in the moving direction of the second component 2 is adjustable so that the protective member 7 can adapt to the relative movement of the first component 1 and the second component 2.

[0105] It can be understood that one end of the protective member 7 is directly sealed and connected to the first component 1 or indirectly sealed and connected through other components. Similarly, the other end of the protective member 7 is directly sealed and connected to the second component 2 or indirectly sealed and connected through other components.

[0106] In some embodiments, as shown in Figures 1 and 2, the linear motor 100 also includes a first mounting seat 81, a second mounting seat 82 and a shock-absorbing spring 83. The first mounting seat 81 is fixed to the first component 1, the second mounting seat 82 is fixed to the second component 2, and the shock-absorbing spring 83 is mounted outside the second buffer 62. Then, on the plane passing through the central axis L of the linear motor 100, the positive projection of the shock-absorbing spring 83 and the positive projection of the second buffer 62 at least partially overlap. The shock-absorbing spring 83 stops between the first mounting seat 81 and the second mounting seat 82 to absorb the vibration transmitted from the ground to the vehicle body 101 when the vehicle 200 is driving, thereby ensuring that the vehicle 200 has good driving smoothness, and at the same time helps to reduce the space occupied by the linear motor 100 in the moving direction of the second component 2.

[0107] Of course, the position of the shock-absorbing spring 83 is not limited to this. The position of the shock-absorbing spring 83 in the moving direction of the second component 2 can be set according to actual needs. For example, if the moving direction of the second component 2 is the up and down direction, the shock-absorbing spring 83 can be arranged at the upper part, middle part, or lower part of the linear motor 100, etc., so as to adapt to the needs of different vehicle models; or, the shock-absorbing spring 83 is arranged outside the linear motor 100 to be independent of the linear motor 100.

[0108] For example, in the example of Figure 2, the linear motor 100 includes a protective member 7, a first mounting seat 81, a second mounting seat 82 and a shock-absorbing spring 83. One end of the protective member 7 is sealed with the first mounting seat 81, so that the protective member 7 is sealed and connected to the first component 1 through the first mounting seat 81. The other end of the protective member 7 is sealed with the second mounting seat 82, so that the protective member 7 is sealed and connected to the second component 2 through the second mounting seat 82. The protective member 7, the first mounting seat 81 and the second mounting seat 82 jointly define a sealed cavity, and the second buffer member 62 is arranged in the sealed cavity to achieve dust and other protection for the second buffer member 62; wherein, the shock-absorbing spring 83 is arranged on the outside of the protective member 7.

[0109] In the description of this application, "the moving direction of the second component 2" refers to the moving direction of the second component 2 relative to the first component 1, and does not mean that when the linear motor 100 is used in a vehicle 200, etc., the second component 2 must be moving and the first component 1 must be stationary; in other words, when the linear motor 100 is used in a vehicle 200, the second component 2 is connected to the wheel 102 of the vehicle 200, and the first component 1 is connected to the body 101 of the vehicle 200, or, the second component 2 is connected to the body 101, and the first component 1 is connected to the wheel 102.

[0110] The vehicle 200 according to the second aspect embodiment of the present application includes a body 101, wheels 102 and a linear motor 100 according to the above-mentioned first aspect embodiment of the present application, one of the first component 1 and the second component 2 is suitable for connecting to the wheel 102 of the vehicle 200, and the other of the first component 1 and the second component 2 is suitable for connecting to the body 102 of the vehicle 200.

[0111] According to the vehicle 200 of the embodiment of the present application, by adopting the above-mentioned linear motor 100, the arrangement of the linear motor is flexible to a certain extent, which can improve the stability of the vehicle.

[0112] Other structures and operations of the vehicle according to the embodiment of the present application are known to ordinary technicians in this field and will not be described in detail here.

[0113] The linear motor 100 according to an embodiment of the present application will be described in detail below with reference to Figures 1 to 5. It should be understood that the following description is merely an example and does not limit the present application.

[0114] As shown in FIG. 1 to FIG. 5 , the linear motor 100 includes a first component 1 , a second component 2 , and a detection component 3 . The first component 1 and the second component 2 move and cooperate in the up-down direction.

[0115] The first component 1 includes a first body 11 and a first magnetic member 12 provided on the first body 11, and the upper portion of the first body 11 has a first guide rod 11g; the second component 2 includes a second body 21 and a second magnetic member 22 provided on the second body 21, and the second body 21 defines a cavity 210, and the top wall of the cavity 210 is formed with a first guide hole 21d. The first guide rod 11g is provided through the first guide hole 21d to guide the movement direction of the second component 2, wherein the outer peripheral wall of the first guide rod 11g is formed with a first mounting groove 11f, and the top wall of the cavity 210 is formed with a second mounting groove 21c, and the upper side of the second mounting groove 21c is open. The second magnetic member 22 may include a plurality of annular permanent magnets arranged in sequence along the axial direction.

[0116] The detection component 3 is used to detect the displacement of the second component 2 relative to the first component 1 and includes a first detection component 31 and a second detection component 32. The first detection component 31 is a sensor grating or a sensor magnetic strip. The first detection component 31 is arranged in the first mounting groove 11f, and the first detection component 31 is suitable for being passed through the first guide hole 21d. The second detection component 32 is a sensor body. The second detection component 32 is arranged in the second mounting groove 21c (for example, the second detection component 32 is fixed to the groove wall of the second mounting groove 21c by bolts) so that the second detection component 32 is arranged outside the cavity 210.

[0117] The linear motor 100 also includes a first guide bearing 4 and a second buffer 62. The first guide bearing 4 is fixed to the second body 21. The first guide bearing 4 is arranged on the upper side of the second detection member 32 and covers at least part of the second detection member 32 (for example, the flange of the first guide bearing 4 covers the upper side of the second detection member 32). The first guide bearing 4 is slidingly fitted with the first guide rod 11g; the second buffer 62 is fixed to the first body 11 and sleeved on the outside of the first guide rod 11g. The second buffer 62 is arranged outside the cavity 210 and is located on the upper side of the first guide bearing 4. During the operation of the linear motor 100, the first guide bearing 4 can always separate the second buffer 32 and the second detection member 32 to prevent the second buffer 62 from squeezing the second detection member 32. The linear motor 100 also includes a first buffer 61, which is arranged in the cavity 210 and is interference fit with the first guide rod 11g.

[0118] The outer wall of the first guide rod 11g is formed with a first positioning portion 11c, and the first guide bearing 4 is formed with a second positioning portion 4a. The first positioning portion 11c is formed as a positioning groove extending to both ends of the length of the first guide rod 11g, and the second positioning portion 4a is formed as a positioning hole. The positioning member is inserted into the positioning hole and positioned in conjunction with the positioning groove to position the first detection member 31 and the second detection member 32 radially opposite each other. The outer wall of the first guide rod 11g is formed with a wiring groove 11d, through which the first magnetic member 12 is guided to the outside of the cavity 210; there are two wiring grooves 1d. The wiring groove 1d, the first positioning portion 11d, and the first mounting groove 11f are spaced apart along the circumference.

[0119] The first body 11 further has a second guide hole 11 h , and the second body 21 has a second guide rod 21 e . The second guide rod 21 e cooperates with the second guide hole 11 h to guide the moving direction of the second component 2 .

[0120] It can be seen that by setting the first buffer 61 and the second buffer 62, the linear motor 100 has complete upper and lower limit and buffering functions. During the operation of the linear motor 100, the second component 2, as a moving part, jumps up and down with the suspension and tire of the entire vehicle. The first guide bearing 4 and the second guide bearing 111 ensure that it performs axial movement according to the design requirements. When jumping up, the upper end face of the second component 2 contacts the second buffer 62 to achieve a buffering effect. When the downward jump limit is reached, the top wall of the cavity 210 contacts the first buffer 61 installed on the first body 11 to play a buffering limit role.

[0121] The second body 21 includes a cylinder 211, a first cover plate 212, and a second cover plate 213. The first cover plate 212 is provided at the top of the cylinder 211. A first guide hole 21d is formed on the first cover plate 212. The first guide bearing 4 has a flange, which is fixed to the first cover plate 212 by bolts. The second cover plate 213 is provided at the bottom of the cylinder 213 and closes the cylinder 213. A second guide rod 21e is formed on the second cover plate 213 (the second guide rod 21e and the second cover plate 213 are integral or separate). For example, the first cover plate 212 and the cylinder 211 are integral, and the second cover plate 213 is fixedly connected to the cylinder 211 by assembly means. The first component 1 can be fitted into the cavity 210 through the lower opening of the cylinder 211, thereby improving the assembly convenience and maintenance convenience of the second component 2 and the first component 1, and having practical and complete assembly feasibility. Exemplarily, the outer peripheral wall of the cylinder 211 is provided with a plurality of support ears spaced apart along the circumferential direction, and each support ear is fixed to the second cover plate 213 by a bolt.

[0122] The second body 21 further includes a push rod 214 , which is disposed on the lower side of the second cover plate 213 and fixedly connected to the second cover plate 213 (eg, welded or bolted). The push rod 214 is connected to the suspension of the vehicle 200 via bolts.

[0123] The linear motor 100 also includes a first mounting seat 81, a second mounting seat 82 and a shock-absorbing spring 83. The first mounting seat 81 is fixed to the top of the first component 1. The first mounting seat 81 includes a tower seat 811, a tower top nut 812, a tower top shock-absorbing structure 813 and a spring upper seat 814. The tower seat 811 is formed with a receiving groove. The tower top shock-absorbing structure 813 is arranged in the receiving groove. The first guide rod 11g is passed through the bottom wall of the receiving groove and the tower top shock-absorbing structure 813. The tower top nut 812 is threadedly connected to the first guide rod 11g to connect the first guide rod 11g to the tower top shock-absorbing structure 813. The spring upper seat 814 is arranged around the outer peripheral side of the tower seat 811. The spring upper seat 814 is directly or indirectly abutted against the upper end of the shock-absorbing spring 83; wherein, the tower seat 811 is connected to the body 102 through a nut. The second mounting seat 82 is sleeved outside the cylinder 211 and connected to the cylinder 211 . The second mounting seat 82 directly or indirectly contacts the lower end of the damping spring 83 . A protective member 7 is connected between the tower seat 811 and the cylinder 211 .

[0124] The linear motor 100 of the present application has active adjustment capabilities and can directly replace existing passive shock absorbers, semi-active shock absorbers, etc., so that the chassis of the entire vehicle has real active adjustment functions; through clever design, the space at the first guide rod 11g and the first guide hole 21d is utilized, and it has advantages in many aspects such as layout space and measurement accuracy, service life, and assembly convenience. It has complete structure and functions, and the guide, limit, and sealing designs are well coordinated. The assembly and maintenance have complete design logic, and the structural design is compact and closely coordinated with each other to fully realize the functions of the linear motor 100. With the help of electronic control, the output thrust and motion stroke of the linear motor 100 are matched to increase the smoothness and comfort of the entire vehicle.

[0125] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0126] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0127] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0128] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0129] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A linear motor (100), wherein, Comprising: A first component (1), the first component (1) including a first body (11) and a first magnetic member (12) provided on the first body (11); A second component (2), the second component (2) being axially movably cooperated with the first component (1), the second component (2) including a second body (21) and a second magnetic member (22) provided on the second body (21); A detection component (3), the detection component (3) being used to detect the displacement of the second component (2) relative to the first component (1), and the detection component (3) including a first detection member (31) and a second detection member (32), the first detection member (31) being provided on the first component (1), the second detection member (32) being provided on the second component (2), at least part of at least one of the first detection member (31) and the second detection member (32) and the second magnetic member (22) being respectively located on both sides of the second body (21); One of the first magnetic member (12) and the second magnetic member (22) is a coil, and the other is a permanent magnet or an electromagnet.

2. The linear motor (100) according to claim 1, wherein, The second body (21) is configured as a housing (21F), the housing (21F) forming a cavity (210), the second magnetic member (22) and the first magnetic member (12) being located in the cavity (210), and the second detection member (32) being located outside the cavity (210).

3. The linear motor (100) according to claim 2, wherein, The first body (11) is formed with a first guiding portion (11a), the second body (21) is formed with a second guiding portion (21a), the first guiding portion (11a) is a first guiding rod (11g), the second guiding portion (21a) is a first guiding hole (21d), the first detection member (31) is provided on the first guiding rod (11g), and at least part of the first detection member (31) is adapted to extend out of the second body (21) through the first guiding hole (21d).

4. The linear motor (100) according to claim 3, wherein, A first mounting groove (11f) is formed on the outer peripheral wall of the first guiding rod (11g), and at least part of the first detection member (31) is received in the first mounting groove (11f).

5. The linear motor (100) according to claim 3 or 4, wherein, A second mounting groove (21c) is provided at a position on the outer wall of the housing (21F) close to the first guiding hole (21d) for arranging the second detection member (32).

6. The linear motor (100) according to claim 5, wherein, In the direction from the end of the housing (21F) to the first guiding hole (21d), the thickness of at least part of the housing (21F) gradually decreases, and the second detection member (32) and the second magnetic member (22) are respectively located on the inner and outer sides of the housing (21F).

7. The linear motor (100) according to any one of claims 4-6, wherein, Further comprising: A first guiding bearing (4), one of the first guiding rod (11g) and the housing (21F) being connected to the first guiding bearing (4), and the other of the first guiding rod (11g) and the housing (21F) being in sliding fit with the first guiding bearing (4).

8. The linear motor (100) according to claim 7, wherein, The first guiding bearing (4) and the second detecting member (32) are both located outside the second body (21). The first guiding bearing (4) is disposed on a side of the second detecting member (32) facing away from the second body (21), and the first guiding bearing (4) covers at least a part of the second detecting member (32).

9. The linear motor (100) according to any one of claims 3-8, wherein, The second detecting member (32) is disposed at the first guiding hole (21d).

10. The linear motor (100) according to claim 9, wherein, The housing (21F) at the first guiding hole (21d) is provided with a first notch (11j), and the first notch (11j) is used for disposing the second detecting member (32).

11. The linear motor (100) according to claim 10, wherein, Further included is: A first guiding bearing (4), one of the first guiding rod (11g) and the housing (21F) is connected to the first guiding bearing (4), and the other of the first guiding rod (11g) and the housing (21F) is in sliding fit with the first guiding bearing (4). The first guiding bearing (4) is formed with a second notch (40), and the second notch (40) is disposed opposite to the first detecting member (31).

12. The linear motor (100) according to any one of claims 3-11, wherein, Further included is: A first guiding bearing (4), one of the first guiding rod (11g) and the housing (21F) is connected to the first guiding bearing (4), and the other of the first guiding rod (11g) and the housing (21F) is in sliding fit with the first guiding bearing (4). The first guiding bearing (4) is formed with a second notch (40), and the second detecting member (32) is disposed at the second notch (40).

13. The linear motor (100) according to any one of claims 3-12, wherein, The first guiding rod (11g) is formed with a first positioning portion (11c), and the first guiding bearing (4) is formed with a second positioning portion (4a), and the second positioning portion (4a) is in circumferential positioning fit with the first positioning portion (11c).

14. The linear motor (100) according to any one of claims 3-13, wherein, A wiring groove (11d) is formed on the outer peripheral wall of the first guiding rod (11g), and the connecting wire of the first magnetic member (12) is guided out of the second body (21) through the wiring groove (11d).

15. The linear motor (100) according to any one of claims 2-14, wherein, When the first body (11) is formed with a third guiding portion (11b) and the second body (21) is formed with a fourth guiding portion (21b), the third guiding portion (11b) is a second guiding hole (11h), and the fourth guiding portion (21b) is a second guiding rod (21e). The first body (11) is formed with an avoidance space (11e), the avoidance space (11e) communicates with the second guiding hole (11h), and the second guiding rod (21e) passes through the second guiding hole (11h) and is adapted to be received in the avoidance space (11e).

16. The linear motor (100) according to claim 15, wherein, The first body (11) includes a second guiding bearing (111), and the second guiding bearing (111) defines the second guiding hole (11h) and is disposed at one end of the avoidance space (11e) away from the first guiding portion (11a) of the first body (11).

17. The linear motor (100) according to any one of claims 1-16, wherein, The detecting assembly (3) is an electromagnetic induction assembly.

18. The linear motor (100) according to any one of claims 1-17, wherein, Further included is: A first buffer member (61) and a second buffer member (62), both the first buffer member (61) and the second buffer member (62) are fixedly provided on the first body (11), the first buffer member (61) is arranged inside the second body (21), and the second buffer member (62) is arranged outside the second body (21).

19. The linear motor (100) according to claim 18, wherein, Further comprising: A protective member (7), the protective member (7) is arranged around the second buffer member (62), the length of the protective member (7) in the moving direction of the second component (2) is adjustable, and both ends of the protective member (7) are hermetically connected to the first component (1) and the second component (2) respectively.

20. The linear motor (100) according to claim 18 or 19, wherein, Further comprising: A first mounting seat (81), the first mounting seat (81) is fixed to the first component (1); A second mounting seat (82), the second mounting seat (82) is fixed to the second component (2); A damping spring (83), the damping spring (83) is sleeved outside the second buffer member (62) and abuts between the first mounting seat (81) and the second mounting seat (82).

21. A vehicle (200), wherein, Comprising a vehicle body (101), a wheel (102) and a linear motor (100) according to any one of claims 1-20, one of the first component (1) and the second component (2) is adapted to be connected to the wheel (102), and the other is adapted to be connected to the vehicle body (101).

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