Linear motor, electromagnetic damping device and vehicle

Abstract

The utility model discloses a linear motor, an electromagnetic damping device and a vehicle. The linear motor comprises a first assembly, a second assembly, a first limiting piece and a second limiting piece. A first cavity is formed in the first assembly, at least part of the second assembly is arranged in the first cavity, a second cavity is formed in the second assembly, and the second limiting piece is arranged in the second cavity; one end of the first limiting piece is connected with the first assembly, and the other end of the first limiting piece extends into the second cavity and is in limiting fit with the second limiting piece so as to limit the first limiting position of the first assembly. Thus, the first limiting piece and the second limiting piece are arranged in the first cavity of the first assembly, the first limiting position of the first assembly is limited through cooperation of the first limiting piece and the second limiting piece, the internal space of the first assembly can be fully utilized, and the overall size of the linear motor can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle suspension, and specifically relates to a linear motor, an electromagnetic vibration reduction device and a vehicle. Background Art

[0002] The electromagnetic vibration reduction device usually includes a fixed seat and a linear motor. The fixed seat is used to connect the vehicle body, and the linear motor is used as an actuator. The linear motor includes a second component and a first component. The part fixedly connected to the fixed seat is called the second component, and the part moving relative to the second component is called the first component.

[0003] In the related art, the electromagnetic vibration reduction device adopts an outer-moving inner-fixed cylindrical linear motor, and the electromagnetic vibration reduction device includes a fixed seat, a second component and a first component. The second component includes an outer cylinder and a magnetic steel arranged on the inner wall of the outer cylinder. The outer cylinder is connected to the fixed seat, and the lower stroke limit of the first component is generally achieved by the bottom cover of the outer cylinder. However, the electromagnetic vibration reduction device using the related art realizes the limit through the outer cylinder structure of the second component, which makes the electromagnetic vibration reduction device larger in size and requires a larger installation space. Utility Model Content

[0004] The present application aims to provide an electromagnetic vibration reduction device and a vehicle, which can solve the problem in the prior art that the outer cylinder structure of the second component is used to limit the electromagnetic vibration reduction device, resulting in a large volume and requiring a large installation space.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In the first aspect, an embodiment of the present application proposes an electromagnetic vibration reduction device, comprising: a first component, a second component, a first limiter and a second limiter; a first cavity is provided in the first component, the second component is at least partially provided in the first cavity, a second cavity is provided in the second component, and the second limiter is provided in the second cavity; one end of the first limiter is connected to the first component, and the other end extends into the second cavity and cooperates with the second limiter to limit the first extreme position of the first component.

[0007] Optionally, a projection of the first stopper in a plane perpendicular to the axial direction of the first component at least partially overlaps with a projection of the second stopper in a plane perpendicular to the axial direction of the first component.

[0008] Optionally, the first limiting member includes a guide rod and a limiting boss; one end of the guide rod is connected to the first component, and the other end extends into the second cavity, and the limiting boss is connected to the other end of the guide rod; the projection of the limiting boss in a plane perpendicular to the axial direction of the first component at least partially overlaps with the projection of the second limiting member in a plane perpendicular to the axial direction.

[0009] Optionally, a guide hole is provided in the second limiting member, and the guide rod is passed through the guide hole; and / or the limiting boss is guided and matched with the inner wall of the second cavity.

[0010] Optionally, the linear motor further comprises a first buffer layer, wherein the first buffer layer is at least partially disposed on a side of the second limiting member facing the limiting boss, and / or the first buffer layer is disposed on a side of the limiting boss facing the second limiting member.

[0011] Optionally, the linear motor also includes a second buffer layer; the second limiting member includes a first end face and a second end face arranged opposite to each other; the first end face faces the limiting boss, and the second limiting member is provided with a plurality of through holes, and the through holes pass through the first end face and the second end face; the first end face is provided with the first buffer layer, and the second end face is provided with the second buffer layer, and the second buffer layer at least partially passes through the through holes to be connected to the first buffer layer.

[0012] Optionally, the second component includes a core shaft; the core shaft is at least partially disposed in the first cavity, and the second cavity is disposed in the core shaft; along the moving direction of the first component, a third limit member is provided at one end of the core shaft facing the first cavity, and the third limit member cooperates with the first component to limit the second extreme position of the first component.

[0013] Optionally, at least a portion of the inner wall of the core shaft protrudes toward the second cavity to form a second limiting member.

[0014] Optionally, it further includes: a first sensing member and a second sensing member; the first sensing member is arranged on the first limiting member, and the second sensing member is arranged in the second cavity, and the first sensing member and the second sensing member are configured to detect the relative displacement between the first component and the second component.

[0015] In a second aspect, an embodiment of the present application proposes an electromagnetic vibration reduction device, comprising a linear motor and a support tower as described in any one of the above items, wherein the first component is connected to the vehicle body through the support tower, and the second component is used to be connected to the lower fork arm.

[0016] In a third aspect, an embodiment of the present application proposes a vehicle, comprising any of the linear motors described above, or comprising the electromagnetic vibration reduction device described above.

[0017] In an embodiment of the present application, a second component is disposed in a first cavity of a first component, a second cavity is provided in the second component, and a second limit member is provided in the second cavity; one end of the first limit member is connected to the first component, and the other end extends into the second cavity and cooperates with the second limit member to limit the first extreme position of the first component. In this way, by disposing both the first limit member and the second limit member in the first cavity of the first component and limiting the first extreme position of the first component through the cooperation of the first limit member and the second limit member, the internal space of the first component can be fully utilized, which helps to reduce the overall volume of the linear motor.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 is a front view of an electromagnetic vibration reduction device according to an embodiment of the present application;

[0021] Figure 2 is a top view of an electromagnetic vibration reduction device according to an embodiment of the present application;

[0022] Figure 3 is along Figure 2 A cross-sectional view of an electromagnetic vibration reduction device along line AA;

[0023] Figure 4 is along Figure 2 A cross-sectional view of another electromagnetic vibration reduction device along line AA;

[0024] Figure 5 is a schematic diagram of the initial state of the electromagnetic vibration reduction device of an embodiment of the present application;

[0025] Figure 6 is a schematic diagram of the connection between the heat conducting member and the heat dissipating member in the electromagnetic vibration reduction device according to an embodiment of the present application;

[0026] Figure 7 is a top view of a heat conducting member and a heat dissipating member in the electromagnetic vibration reduction device according to an embodiment of the present application;

[0027] Figure 8 is a cross-sectional view of a second position-limiting member of an embodiment of the present application;

[0028] Fig. 9 It is a cross-sectional view of the connection structure between the first buffer layer and the second buffer layer in an embodiment of the present application.

[0029] Reference numerals:

[0030] 1-first stopper; 2-second stopper; 3-first assembly; 4-second assembly; 5-housing; 6-second cavity; 7-guide rod; 8-stop boss; 9-guide hole; 10-first buffer layer; 11-core shaft; 13-first induction member; 14-second induction member; 15-third buffer layer; 16-magnetic steel; 17-winding; 18-metal ring; 19-sliding member; 20-spring; 21-spring tray; 22-rubber Component; 23-spring support; 24-fixed seat; 25-heat conducting component; 26-heat dissipating component; 27-reinforcement component; 28-support plate; 29-protective cover; 30-third limiting component; 31-first cavity; 32-second buffer layer; 201-first end face; 202-second end face; 203-through hole; 204-connecting part; A-first limit position; B-second limit position; S-initial position; L-upward stroke; H-downward stroke. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be described in detail below, and 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 should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0032] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The electromagnetic vibration reduction device and the vehicle provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0036] like Figure 1-Figure 5 As shown, an electromagnetic vibration reduction device according to some embodiments of the present application includes: a first component 3, a second component 4, a first limiter 1 and a second limiter 2; a first cavity 31 is provided in the first component 3, the second component 4 is at least partially provided in the first cavity 31, a second cavity 6 is provided in the second component 4, and the second limiter 2 is provided in the second cavity 6; one end of the first limiter 1 is connected to the first component 3, and the other end extends into the second cavity 6, and cooperates with the second limiter 2 to limit the first extreme position A of the first component 3.

[0037] In the embodiment of the present application, the second component 4 is arranged in the first cavity 31, the second cavity 6 is provided in the second component 4, and the second limit member 2 is arranged in the second cavity 6; one end of the first limit member 1 is connected to the first component 3, and the other end extends into the second cavity 6, and cooperates with the second limit member 2 to limit the first extreme position A of the first component 3. In this way, by arranging both the first limit member 1 and the second limit member 2 in the first cavity 31 of the first component, and limiting the first extreme position A of the first component through the cooperation of the first limit member 1 and the second limit member 2, the internal space of the first component 3 can be fully utilized, which helps to reduce the overall volume of the linear motor.

[0038] It should be noted that the second component 4 and the first component 3 constitute a linear motor. The first component 3 may be a mover, and the second component 4 may be a stator. Figure 5 As shown, the second component 4 includes a winding 17, and the first component 3 also includes a magnet 16. The initial positions of the second component 4 and the first component 3 are located at S. The distance between the first component 3 moving from the initial position S to the first extreme position A is the down stroke H; the distance between the first component 3 moving from the initial position S to the second extreme position B is the up stroke L.

[0039] In some embodiments, Figure 3As shown, the first component 3 includes a shell 5, a second cavity 6 is provided in the shell 5, and the first stopper 1 is connected to the bottom of the shell 5. The shell 5 can be configured as a cylinder. The cylinder here can be a cylinder with a circular, elliptical or polygonal cross section.

[0040] In some embodiments, Figure 3 As shown, a sliding member 19 is further provided between the first component 3 and the second component 4 to reduce the friction force when the first component 3 moves along a straight line relative to the second component 4. The sliding member 19 may be a sliding bearing.

[0041] In some embodiments, Figure 3 As shown, the second component 4 further includes a metal ring 18, which is disposed on the winding 17. The metal ring 18 is used to increase the eddy current damping force of the linear motor when the linear motor has no power.

[0042] Optionally, a projection of the first stopper 1 in a plane perpendicular to the axial direction of the first component 3 at least partially overlaps with a projection of the second stopper 2 in a plane perpendicular to the axial direction of the first component 3 .

[0043] In the embodiment of the present application, the projection of the first limiting member 1 in a plane perpendicular to the axial direction of the first component 3 is arranged to at least partially overlap with the projection of the second limiting member 2 in a plane perpendicular to the axial direction of the first component 3, so that the first limiting member 1 and the second limiting member 2 can abut against each other to form a limit when they move relative to each other.

[0044] Alternatively, if Figure 3 As shown, the first limiting member 1 includes a guide rod 7 and a limiting boss 8; one end of the guide rod 7 is connected to the first component 3, and the other end extends into the second cavity 6, and the limiting boss 8 is connected to the other end of the guide rod 7; the projection of the limiting boss 8 in a plane perpendicular to the axial direction of the first component 3 at least partially overlaps with the projection of the second limiting member 2 in a plane perpendicular to the axial direction.

[0045] In the embodiment of the present application, one end of the guide rod 7 is connected to the housing 5 of the first component 3, and the other end extends into the second cavity 6, and the limiting boss 8 is connected to the other end of the guide rod 7, and the projection of the limiting boss 8 in a plane perpendicular to the axial direction of the first component 3 is at least partially overlapped with the projection of the second limiting member 2 in a plane perpendicular to the axial direction. In this way, when the first component 3 moves downward, the limiting boss 8 abuts against the second limiting member 2 to limit the further downward movement of the first component 3, thereby limiting the downward stroke H of the first component 3.

[0046] Specifically, the second limiting member 2 can be arranged around the guide rod 7, and the limiting boss 8 can be an annular continuous frustum, or the limiting boss 8 can be an annular discontinuous frustum, which is not limited in the present application.

[0047] Alternatively, if Figure 3 As shown, a guide hole 9 is provided in the second limiting member 2 , and the guide rod 7 is passed through the guide hole 9 ; and / or the limiting boss 8 is guided and matched with the inner wall of the second cavity 6 .

[0048] In the embodiment of the present application, a guide hole 9 is provided in the second limit member 2, the guide rod 7 is passed through the guide hole 9, and the limit boss 8 cooperates with the inner wall guide of the second cavity 6. In this way, the guide rod 7 and the guide hole 9 can cooperate to play a guiding role, and the limit boss 8 can cooperate with the inner wall guide of the second cavity 6 to play a guiding role, so as to facilitate the second component 4 to move along a fixed direction.

[0049] Specifically, the axis of the guide hole 9, the axis of the guide rod 7 and the axis of the second component 4 coincide, so that the guide rod 7 can move along the axis of the guide hole 9, and then the first component 3 moves along the axis of the second component 4, reducing the friction between the first component 3 and the second component 4.

[0050] Specifically, the limiting boss 8 can be in direct contact with the inner wall of the second cavity 6 , so that the limiting boss 8 can move along the inner wall of the second cavity 6 , further playing a guiding role for the second component 4 .

[0051] In some embodiments, the guide rod 7 and the limiting boss 8 are integrally formed. By providing the guide rod 7 and the limiting boss 8 as an integrally formed part, the connection strength between the guide rod 7 and the limiting boss 8 can be improved, and installation is convenient.

[0052] Alternatively, if Figure 3 and Figure 4 As shown, the linear motor further includes a first buffer layer 10, which is at least partially disposed on a side of the second limiting member 2 facing the limiting boss 8, and / or the first buffer layer 10 is disposed on a side of the limiting boss 8 facing the second limiting member 2.

[0053] In the embodiment of the present application, the first buffer layer 10 is provided on the side of the second stopper 2 facing the stopper boss 8, and / or the first buffer layer 10 is provided on the side of the stopper boss 8 facing the second stopper 2. In this way, the guide rod 7 is prevented from hitting the second stopper 2 when moving to the upper edge of the second stopper 2, generating noise and damaging the guide rod 7.

[0054] It should be noted that the first buffer layer 10 can be only arranged on the side of the second limiting member 2 facing the limiting boss 8, the first buffer layer 10 can also be only arranged on the side of the limiting boss 8 facing the second limiting member 2, and the first buffer layer 10 can be arranged on both the limiting boss 8 and the second limiting member 2.

[0055] Alternatively, if Figure 8 and Fig. 9As shown, the linear motor also includes a second buffer layer 32; the second limiting member 2 includes a first end face 201 and a second end face 202 arranged opposite to each other; the first end face 201 faces the limiting boss 8, and a plurality of through holes 203 are provided in the second limiting member 2, and the through holes 203 pass through the first end face 201 and the second end face 202; the first end face 201 is provided with a first buffer layer 10, and the second end face 202 is provided with a second buffer layer 32, and the second buffer layer 32 at least partially passes through the through holes 203 to be connected with the first buffer layer 10.

[0056] In the embodiment of the present application, a plurality of through holes 203 are provided in the second stopper 2, and the through holes 203 penetrate the first end face 201 and the second end face 202, a first buffer layer 10 is provided on the first end face 201, and a second buffer layer 32 is provided on the second end face 202, and the second buffer layer 32 at least partially passes through the through holes 203 and is connected to the first buffer layer 10. In this way, buffer layers are provided on both the upper and lower end faces of the second stopper 2, so that the first buffer layer 10 and the second buffer layer 32 cooperate to protect the upper and lower end faces of the second stopper 2 and prevent damage to the second stopper 2. At the same time, the second buffer layer 32 at least partially passes through the through holes 203 and is connected to the first buffer layer 10, so that the first buffer layer 10 and the second buffer layer 32 can be connected into a whole, so that the first buffer layer 10 can withstand a greater impact of the guide rod 7.

[0057] Specifically, a plurality of through holes 203 are provided between the first end surface 201 and the second end surface 202 of the second stopper 2 . The second buffer layer 32 includes a connecting portion 204 passing through the through hole 203 . The second buffer layer 32 is connected to the first buffer layer 10 via the connecting portion 204 .

[0058] It should be noted that a plurality of through holes 203 can be arranged in the second limit member 2 along the circumferential interval of the second limit member 2, the interval distance can be set according to actual needs, and the diameter of the through hole 203 can be set according to actual needs, which is not limited in the embodiment of the present application.

[0059] The first buffer layer 10 and the second buffer layer 32 can be made of flexible materials such as rubber. The specific structure and material of the first buffer layer 10 and the second buffer layer 32 can be flexibly set according to actual needs, and the embodiment of the present application does not limit this.

[0060] Alternatively, if Figure 4-Figure 7 As shown, the second component 4 includes a core shaft 11; the core shaft 11 is at least partially disposed in the first cavity 31, and a second cavity 6 is disposed in the core shaft 11; along the moving direction of the first component 3, a third limit member 30 is provided at one end of the core shaft 11 facing the first cavity 31, and the third limit member 30 is limitedly cooperated with the first component 3 to limit the second extreme position B of the first component 3.

[0061] In the embodiment of the present application, by at least partially arranging the mandrel 11 in the first cavity 31, along the moving direction of the first component 3, a third stopper 30 is provided at one end of the mandrel 11 facing the first cavity 31, and the third stopper 30 is limitedly matched with the first component 3 to limit the position of the first component 3 moving toward the direction close to the second component 4. In this way, the upward stroke L of the first component 3 is limited by the cooperation between the third stopper 30 and the first component 3.

[0062] Specifically, the third stopper 30 is disposed at the end of the mandrel 11 close to the bottom of the housing 5. The third stopper 30 can be connected to the mandrel 11 or can be integrally formed with the mandrel 11. This is not limited in the present application. It should be noted that the third stopper 30 can be an annular plate or a plate of other shapes.

[0063] Alternatively, if Figure 4 As shown, at least a portion of the inner wall of the core shaft 11 protrudes toward the second cavity 6 to form the second limiting member 2 .

[0064] In the embodiment of the present application, the inner wall of the core shaft 11 protrudes toward the second cavity 6 to form the second limit member 2, and the protrusion cooperates with the first limit member 1 to limit the lower stroke H of the first component 3.

[0065] Specifically, the second position-limiting member 2 and the core shaft 11 may be an integrally formed member. By arranging the second position-limiting member 2 and the core shaft 11 as an integrally formed member, it is beneficial to improve the structural strength of the second position-limiting member 2 .

[0066] In some embodiments, a third buffer layer 15 is provided on one side of the housing 5 close to the third stopper 30. By providing the third buffer layer 15 on one side of the housing 5 close to the third stopper 30, the guide rod 7 is prevented from hitting the third stopper 30 when moving to the lower edge of the third stopper 30, thereby preventing the guide rod 7 from generating noise and damaging the third stopper 30. It should be noted that the third buffer layer 15 can be constructed as a soft elastic structure such as a rubber pad.

[0067] Optionally, the linear motor further includes: a first sensing member 13 and a second sensing member 14; the first sensing member 13 is disposed on the first limit member 1, and the second sensing member 14 is disposed in the second cavity 6, and the first sensing member 13 and the second sensing member 14 are configured to detect the relative displacement between the first component 3 and the second component 4.

[0068] In the embodiment of the present application, by arranging the first sensing member 13 on the first limiting member 1 and the second sensing member 14 in the second cavity 6, the first sensing member 13 and the second sensing member 14 are configured to detect the relative displacement of the first component 3 and the second component 4. In this way, when the first limiting member 1 moves, the displacement size of the first component 3 during the movement can be detected, so that the electromagnetic vibration reduction device can output a matching current size based on the displacement size.

[0069] Specifically, the second sensing element 14 is disposed on a side of the core shaft 11 close to the guide rod 7 , and the first sensing element 13 is disposed on an outer surface of the guide rod 7 .

[0070] In some embodiments, the first sensing member 13 is a magnetic strip, which is arranged outside the four sides of the guide rod 7, and the second sensing member 14 is a detection circuit board with a Hall element. The detection circuit board is connected to the core shaft 11 or to the second limiter 2; when the linear motor performs linear motion, it will drive the magnetic strip to move, and then the detection circuit board will sense.

[0071] In the second aspect, an embodiment of the present application proposes an electromagnetic vibration reduction device, comprising a linear motor and a support tower as described in any one of the above embodiments, wherein the first component 3 is connected to the vehicle body through the support tower, and the second component 4 is used to be connected to the lower fork arm.

[0072] In the embodiment of the present application, the first component 3 of the linear motor is connected to the vehicle body through a support tower, and the second component 4 is connected to the lower fork arm. In this way, the vibration of the vehicle body can be offset by the reverse force formed by the cooperation between the first component 3 and the second component 4, thereby suppressing the bouncing of the vehicle and improving the stability of the vehicle.

[0073] Furthermore, by arranging the second component 4 in the first cavity 31, a second cavity 6 is provided in the second component 4, and the second limit member 2 is provided in the second cavity 6; one end of the first limit member 1 is connected to the first component 3, and the other end extends into the second cavity 6, and cooperates with the second limit member 2 to limit the first extreme position A of the first component 3. In this way, by arranging both the first limit member 1 and the second limit member 2 in the first cavity 31 of the first component, and limiting the first extreme position A of the first component through the cooperation of the first limit member 1 and the second limit member 2, the internal space of the first component 3 can be fully utilized, which helps to reduce the overall volume of the linear motor.

[0074] In some embodiments, Figure 3 As shown, the support tower includes a fixing seat 24, a reinforcement 27, a rubber member 22 and a support plate 28. The rubber member 22 is arranged between the fixing seat 24 and the support plate 28, the support plate 28 is connected to the winding 17 of the second component 4, the fixing seat is connected to the core shaft of the second component 4, and the reinforcement 27 is connected to the core shaft 11 of the second component 4. The function of the rubber member 22 is to absorb the vibration energy of the core shaft 11 along the moving direction of the first component 3. The support plate 28 is connected to the fixing seat 24. In terms of technology, the fixing seat 24 and the support plate 28 can be made into an integral part, and the function is to transmit force to the vehicle body. The support plate 28 can be arranged spaced apart from the winding 17 of the second component 4 along the axial direction.

[0075] In some embodiments, Figure 1-Figure 3As shown, the electromagnetic vibration reduction device may include a spring 20. The spring 20 is sleeved on the outside of the second component 4. And the spring 20 is limitedly fitted between the spring tray 21 and the spring support 23 along the moving direction of the first component 3. The spring tray 21 is fixedly connected to the housing 5, and the spring support 23 is fixedly connected to the fixing seat 24; in this way, the spring 20 can reduce vibration when the vehicle is bumped, and the spring 20 releases energy during the recovery process after absorbing vibration energy. This part of energy can be offset by the reverse force formed by the cooperation between the first component 3 and the second component 4, so that the damping force of the spring 20 in the recovery process is increased, thereby suppressing the bouncing of the vehicle and improving the stability of the vehicle.

[0076] Furthermore, if Figure 5 As shown, the initial state of the electromagnetic vibration reduction device in the present application is set so that the bottom of the winding 17 of the second component 4 is flush with the bottom of the magnet 16. When the housing 5 moves upward, the effective bonding area of ​​the winding 17 and the magnet 16 remains unchanged. However, when the housing 5 of the linear motor moves downward, the effective bonding area of ​​the winding 17 and the magnet 16 changes. In this way, the restoring damping force provided by the electromagnetic vibration reduction device is greater than the compression damping force, and the vibration energy can be quickly converted into heat energy and released into the environment to finally achieve a rapid vibration reduction effect. At the same time, this structural design also reduces the difficulty of using software debugging to make the restoring damping force greater than the compression damping force. Moreover, this design can shorten the length of the linear motor, save axial space, and shorten the period of the second component 4 while meeting the actual output thrust requirements, so that the reverse voltage of the linear motor decreases and the input current increases.

[0077] In some embodiments, Figure 3 As shown, the electromagnetic vibration reduction device may further include a protective cover 29. The protective cover 29 is configured to be deformable along the moving direction of the first component 3. The protective cover 29 is sleeved on the outer side of the housing 5. One end of the protective cover 29 along the moving direction of the first component 3 is fixed to the fixing seat 24, and the other end is fixed to the housing 5. In this way, by providing a dust cover, the second component 4 can be protected to prevent foreign matter such as dust from invading and affecting the operation of the second component 4 and the first component 3, which is conducive to reducing the failure rate.

[0078] In some embodiments, Figure 4-Figure 7As shown, the electromagnetic vibration reduction device may also include a heat conductor 25 and a heat sink 26. The core shaft 11 is at least partially fixed to the seat 24 along the moving direction of the first component, and a mounting groove (not shown in the figure) is provided on the inner wall of the core shaft 11. The mounting groove is extended along the moving direction of the first component 3, and the heat conductor 25 is arranged in the mounting groove of the core shaft 11 (not shown in the figure). The heat sink 26 is located on the side of the fixed seat 24 away from the shell 5. The heat sink 26 is connected to the outer wall of the core shaft 11, so that when the winding 17 is energized and generates heat, the heat is received inside the core shaft 11, and the heat is transferred to the outer wall of the core shaft via the heat conductor 25, and then transferred to the heat sink 26, and is dissipated by the heat sink 26.

[0079] In some embodiments, Figure 6-Figure 7 As shown, the heat conducting member 25 of the present application can be constructed as a heat conducting pipe. The heat dissipating member 26 can be constructed as a heat dissipating fin. The core shaft 11 is provided with a mounting groove, and the mounting groove extends from one end of the core shaft 11 to the other end. A heat conducting pipe is placed in the mounting groove. The portion of the core shaft 11 extending out of the fixing seat 24 is welded with heat dissipating fins. The heat dissipating fins are arranged in an axial array along the core shaft 11. At the same time, a fan (not shown in the figure) can be arranged beside the heat dissipating fins to improve the heat dissipation efficiency, thereby improving the condensation efficiency of the medium in the heat conducting pipe, and the natural wind during the driving of the vehicle can also be used to cool the heat dissipating fins.

[0080] Furthermore, the heat pipe can be selected as a two-phase closed thermosyphon (not shown in the figure), also known as a gravity heat pipe. The gravity heat pipe includes a tube shell, an absorption core and an end cover. The gravity heat pipe is divided into a heating section and a cooling end along the height direction. The heating section is at the bottom and the cooling section is at the top. The reflux of the working liquid can be satisfied by gravity, and a tube core with a capillary structure is not required. Heat is transferred by evaporation and condensation of the liquid in a fully enclosed vacuum tube. The working liquid has a low boiling point and is easy to volatilize. The absorption core is composed of a capillary porous material. The lower part of the gravity heat pipe is the evaporation section, and the upper part is the condensation section. When the lower part of the heat pipe is heated, the liquid phase medium quickly evaporates into a gas phase and flows to the condensation section under the action of the pressure difference. The gas phase medium recondenses into a liquid phase medium after releasing heat in the condensation section, and the liquid phase medium flows back to the evaporation section by the action of its own gravity.

[0081] An embodiment of the present application proposes a vehicle, comprising any of the linear motors described above, or comprising the electromagnetic vibration reduction device described above.

[0082] In the embodiment of the present application, when the vehicle suspension is installed with the electromagnetic vibration reduction device, it is helpful to reliably limit the amplitude of the vibration of the vehicle at the height of the vehicle body, so as to improve the stability of the vehicle body. At the same time, by arranging the second component 4 in the first cavity 31, the second component 4 is provided with a second cavity 6, and the second limiter 2 is arranged in the second cavity 6; one end of the first limiter 1 is connected to the first component 3, and the other end extends into the second cavity 6, and cooperates with the second limiter 2 to limit the first limit position A of the first component 3. In this way, by arranging the first limiter 1 and the second limiter 2 in the first cavity 31 of the first component, the first limiter 1 and the second limiter 2 cooperate to limit the first limit position A of the first component, and the internal space of the first component 3 can be fully utilized, which helps to reduce the overall volume of the linear motor.

[0083] It should be noted that the electromagnetic vibration reduction device realizes active control of the vehicle's height direction smoothness and recovers a certain amount of energy by providing axial thrust. When the vehicle passes through a bumpy road, the body and the wheel transmit force through the fixing seat 24, the housing 5 and the lower fork arm respectively to compress the spring 20. In order to offset the elastic potential energy of the spring 20, the first component 3 and the second component 4 provide damping force, and the energy consumption form is mainly the heat energy generated when the second component 4 and the first component 3 operate and the friction between the first component 3 and the sliding member 19.

[0084] In a traditional vibration reduction device, the spring 20 absorbs ground vibration and converts mechanical energy into elastic potential energy. If there is no damper, the spring 20 needs to move repeatedly to consume the elastic potential energy, that is, it takes a long time to consume energy in a cycle, which reduces the comfort of the whole vehicle. The function of the damper is to increase energy consumption during each expansion and contraction of the spring 20, convert potential energy into heat energy and release it into the environment, and finally achieve the effect of rapid energy consumption. Simply put, the damper is used to suppress the impact generated when the spring 20 recovers its deformation after vibration reduction, that is, to suppress the jump of the spring 20.

[0085] The present application is an electromagnetic vibration reduction device with variable effective combination length. Compared with the traditional vibration reduction device, the present application uses a linear motor to replace the passive damper in the traditional vibration reduction device. It can be said that the linear motor is an active damper. The effect brought by the effective combination area variable design in the present application is that the restoring damping force provided by the electromagnetic vibration reduction device is greater than the compression damping force. In the compression stroke, that is, in the process of the axle and the frame approaching each other, the compression damping force is small, and the elastic effect of the spring 20 can be fully utilized to alleviate the impact. If the compression damping force is too large, the impact and vibration from the road surface will be transmitted to the vehicle body. In the extension stroke (restoration stroke), the vibration is mainly in the tire, and the vehicle body is less sensitive, so the restoring damping force can be larger, and the larger restoring damping force can quickly dissipate the elastic potential energy of the spring 20 from full compression to rebound recovery. The lower compression damping force and the higher high restoring damping force can make up for a certain degree of vehicle handling. For example, when the vehicle is turning, the smaller damping force on the compression side will cause the body posture to tilt, while the higher restoring damping force on the other side will compensate for it, allowing the body posture to be maintained at an appropriate level.

[0086] In the description of this specification, the description with reference to the terms "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 schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0087] 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 spirit 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, characterized in that: include: A first component (3), a second component (4), a first limiting member (1) and a second limiting member (2); A first cavity (31) is provided in the first component (3), the second component (4) is at least partially provided in the first cavity (31), a second cavity (6) is provided in the second component (4), and the second limiting member (2) is provided in the second cavity (6); one end of the first limiting member (1) is connected to the first component (3), and the other end extends into the second cavity (6) and cooperates with the second limiting member (2) to limit the first extreme position of the first component (3).

2. The linear motor according to claim 1, characterized in that: The projection of the first limiting member (1) in a plane perpendicular to the axial direction of the first component (3) at least partially overlaps with the projection of the second limiting member (2) in a plane perpendicular to the axial direction of the first component (3).

3. The linear motor according to claim 2, characterized in that: The first limiting member (1) comprises a guide rod (7) and a limiting boss (8); One end of the guide rod (7) is connected to the first component (3), and the other end extends into the second cavity (6), and the limiting boss (8) is connected to the other end of the guide rod (7); The projection of the limiting boss (8) in a plane perpendicular to the axial direction of the first component (3) at least partially overlaps with the projection of the second limiting member (2) in a plane perpendicular to the axial direction.

4. The linear motor according to claim 3, characterized in that: A guide hole (9) is provided in the second limiting member (2), and the guide rod (7) is inserted into the guide hole (9); and / or the limiting boss (8) is in guiding cooperation with the inner wall of the second cavity (6).

5. The linear motor according to claim 3, characterized in that: The linear motor further comprises a first buffer layer (10), wherein the first buffer layer (10) is arranged on a side of the second limiting member (2) facing the limiting boss (8), and / or the first buffer layer (10) is arranged on a side of the limiting boss (8) facing the second limiting member (2).

6. The linear motor according to claim 5, characterized in that: The linear motor also includes a second buffer layer (32); the second limiting member (2) includes a first end face (201) and a second end face (202) that are arranged opposite to each other; the first end face (201) faces the limiting boss (8), and a plurality of through holes (203) are provided in the second limiting member (2), and the through holes (203) pass through the first end face (201) and the second end face (202); the first end face (201) is provided with the first buffer layer (10), and the second end face (202) is provided with the second buffer layer (32), and the second buffer layer (32) at least partially passes through the through holes (203) to be connected to the first buffer layer (10).

7. The linear motor according to claim 1, characterized in that: The second component (4) comprises a core shaft (11); the core shaft (11) is at least partially disposed in the first cavity (31), and the second cavity (6) is disposed in the core shaft (11); The core shaft (11) is provided with a third position-limiting member (30), and the third position-limiting member (30) cooperates with the first component (3) to limit the second extreme position of the first component (3).

8. The linear motor according to claim 7, characterized in that: At least part of the inner wall of the core shaft (11) protrudes toward the second cavity (6) to form the second limiting member (2).

9. The linear motor according to claim 1, characterized in that: Also includes: A first induction element (13) and a second induction element (14); A first sensing element (13) is arranged on the first limiting element (1), and a second sensing element (14) is arranged in the second cavity (6). The first sensing element (13) and the second sensing element (14) are configured to detect the relative displacement between the first component (3) and the second component (4).

10. An electromagnetic vibration reduction device, characterized in that: It comprises the linear motor and the support tower according to any one of claims 1 to 9, wherein the first component (3) is connected to the vehicle body through the support tower, and the second component (4) is used to be connected to the lower fork arm.

11. A vehicle, characterized in that: It comprises the linear motor as claimed in any one of claims 1 to 9, or the electromagnetic vibration reduction device as claimed in claim 10.

Images