Vibration reduction devices, vibration reduction systems and vehicle seats

Abstract

The present invention discloses a vibration reduction device, a vibration reduction system and a vehicle seat, wherein the vibration reduction device is used for a vehicle seat, comprising: a seat support plate, a vehicle body connecting plate, an elastic bearing assembly, one end of which is connected to the seat support plate, the other end of which is connected to the vehicle body connecting plate, and a driving assembly, wherein the driving assembly extends from the lower area of ​​the vehicle body connecting plate facing the vehicle body side to the side of the seat support plate facing the vehicle body connecting plate, and the driving assembly drives the seat connecting plate to move in the telescopic direction of the elastic bearing assembly. The technical solution provided by the present invention can adjust the damping of the elastic bearing assembly to adapt to road conditions through the driving assembly, thereby further improving the comfort of passengers.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration reduction, and in particular to a vibration reduction device, a vibration reduction system and a vehicle seat. Background Art

[0002] The vibration reduction structure of vehicle seats is divided into mechanical spring type and air spring type, both of which are passive vibration reduction. Due to the strong overall structural rigidity of these structures, the vibration reduction effect is still poor even when filled with high-density foam. Long-term riding can easily lead to short-term or long-term strain on the body, such as dizziness, vertigo, shortness of breath, discomfort in the cervical and lumbar vertebrae, etc. Summary of the invention

[0003] The main purpose of the present invention is to provide a vibration reduction device, a vibration reduction system and a vehicle seat, aiming to solve the technical problem of poor vibration reduction effect in the prior art.

[0004] To achieve the above object, a vibration reduction device is provided for a vehicle seat, comprising:

[0005] Seat support plate,

[0006] Body connecting plate,

[0007] an elastic bearing assembly, one end of which is connected to the seat support plate and the other end of which is connected to the vehicle body connecting plate, and

[0008] A driving assembly extends from a lower area of ​​the vehicle body connecting plate facing the vehicle body to a side of the seat support plate facing the vehicle body connecting plate, and the driving assembly drives the seat connecting plate to move in the telescopic direction of the elastic bearing assembly.

[0009] Optionally, the vibration reduction device comprises two elastic bearing components, and the two elastic bearing components are arranged on both sides of the driving component with the axis of the driving component as the axis of symmetry.

[0010] Optionally, the elastic load-bearing component includes a spring and two spring limit tubes; wherein the two spring limit tubes are fixedly connected to the seat support plate and the vehicle body connecting plate respectively; both ends of the spring extend into the two spring limit tubes respectively and are fixedly connected to the seat support plate and the vehicle body connecting plate; the expansion and contraction direction of the spring is the expansion and contraction direction of the elastic load-bearing component.

[0011] Optionally, the driving component is a linear motor, which includes an electromagnetic coil and a magnetic steel telescopic plate, and the magnetic steel telescopic plate of the linear motor is fixedly connected to the seat connecting plate.

[0012] Optionally, the vibration reduction device also includes: a guide assembly, including a guide post and a mounting seat, wherein one end of the guide post extends into the mounting seat, the guide post moves bidirectionally in the telescopic direction of the elastic load-bearing assembly, the other end of the guide post is fixedly connected to the seat support plate, and the bottom end of the mounting seat is fixedly connected to the vehicle body connecting plate.

[0013] Optionally, the vibration damping device also includes a supporting component, a first end face of the supporting component is fixed to a side of the vehicle body connecting plate on which the elastic load-bearing component is provided, the supporting component extends in the telescopic direction, and a second end face of the supporting component does not contact the seat support plate, wherein two opposite first side faces of the supporting component are respectively in contact with the guide rail sliders on both sides of the driving component; and the second side face of the supporting component is in contact with the outer wall of the driving component.

[0014] Optionally, the distance between the seat support plate and the second end surface of the support component is greater than the maximum compression amount of the elastic load-bearing component.

[0015] Optionally, the present invention also proposes a vibration reduction system for a vehicle seat, comprising the aforementioned vibration reduction device, a central processing unit and a sensor device.

[0016] Optionally, the central processing unit is mounted on a third side surface of the supporting component away from the slide rail.

[0017] Optionally, the present invention further provides a vehicle seat, comprising the aforementioned vibration reduction device.

[0018] The technical solution of the present invention changes the relative height between the seat support plate and the vehicle body connecting plate through a driving component to cope with the up and down shaking of the vehicle body caused by bumpy road conditions. The driving component gives a movement in the opposite direction of the vehicle body movement to offset most of the external excitations to achieve active vibration reduction, thereby improving the vibration reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of a vibration reduction device of the present invention;

[0021] Figure 2 A schematic diagram of a vibration reduction device of the present invention from a first viewing angle;

[0022] Figure 3 is a schematic diagram of a vibration reduction device of the present invention from a second viewing angle;

[0023] Figure 4 is a schematic diagram of a vibration reduction device of the present invention from a third viewing angle;

[0024] Figure 5 A three-dimensional schematic diagram of a connection structure between a support component and a drive component of the present invention;

[0025] Figure 6 A schematic plan view of a connection structure between a supporting component and a driving component of the present invention;

[0026] Figure 7 It is a module schematic diagram of a vibration reduction system of the present invention.

[0027] Description of Figure Numbers:

[0028] Label name Label name 100 Seat support plate 400a Magnetic steel expansion plate 200 Body connecting plate 400b Guide rail slider 300 Elastic load bearing components 400a-1 Slide rails 400 Drive components 500a Guide column 500 Guide components 500b Mounting Seat 600 Supporting Components 600a First end face 700 CPU 600b Second end face 800 Sensor device 600c First side 300a spring 600d Second side 300b Spring limit tube 600e The third side

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The invention provides a vibration reduction device.

[0035] See attached Figures 1 to 6 As shown, the vibration reduction device is used for a vehicle seat, and includes a seat support plate 100, a vehicle body connecting plate 200, an elastic bearing assembly 300 and a driving assembly 400. The elastic bearing assembly 300 is connected to the seat support plate 100 at one end and to the vehicle body connecting plate 200 at the other end. The driving assembly 400 extends from the area below the vehicle body connecting plate facing the vehicle body to the side of the seat support plate facing the vehicle body connecting plate (that is, from the area below the lower surface of the vehicle body connecting plate 200 to the lower surface of the seat support plate 100), and the driving assembly 400 drives the seat connecting plate 100 to move in the telescopic direction of the elastic bearing assembly 300. When a vehicle is traveling on an uneven road surface or needs to go up or down a slope, the vehicle will generate acceleration in the vertical direction and then generate an exciting force in the vertical direction. In the prior art, this exciting force acts on the elastic bearing component, and the elastic bearing component stretches or shortens to attenuate the exciting force and achieve passive vibration reduction. However, the elastic bearing component has rigidity and its vibration reduction effect is limited. Especially when encountering a bumpy road surface, since the damping of the elastic bearing component cannot be adjusted, the elastic bearing component cannot attenuate the exciting force or requires a long attenuation time, causing the vehicle occupants to easily fatigue. The technical solution provided by the present invention is: by changing the relative height of the seat support plate and the vehicle body connecting plate through the driving component, the up and down shaking of the vehicle body caused by the bumpy road condition is changed, that is, the reverse movement of the vehicle body is given, thereby offsetting most of the external excitation, so as to achieve active vibration reduction, thereby improving the vibration reduction effect, and overcoming the technical problem of poor spring vibration reduction effect in the prior art; and the elastic bearing component plays a role of auxiliary bearing and certain guidance.

[0036] Optionally, two elastic bearing components 300 are arranged on both sides of the driving component 400 with the axis of the driving component 400 as the axis of symmetry; in the specific implementation process, the axis of the driving component 400 can be the geometric center line of the driving component 400, or the axis of the telescopic component of the driving component 400; the axis of the two elastic bearing components 300 are consistent with the geometric center line of the driving component 400. Considering that the seat has a certain weight, if the elastic bearing components 300 are arranged asymmetrically or arranged on one side of the driving component 400 at the same time, the seat support plate has the risk of tilting and swinging during vibration reduction; in the present invention, the elastic bearing components 300 are arranged on both sides of the driving component 400 mainly to make the changes of the two elastic bearing components 300 during auxiliary vibration reduction as consistent as possible, to prevent the elastic deformation of the elastic bearing components 300 from being asynchronous when attenuating external excitations, causing the seat support plate 100 to swing.

[0037] Optionally, each elastic bearing component 300 includes a spring 300a and two spring limiting tubes 300b, wherein the two spring limiting tubes 300b are respectively fixedly connected to the seat support plate 100 and the vehicle body connecting plate 200, and both ends of the spring 300a extend into the two spring limiting tubes 300b and are respectively fixedly connected to the seat support plate 100 and the vehicle body connecting plate 200, and the expansion and contraction direction of the spring 300a is the expansion and contraction direction of the elastic bearing component 300; in the specific implementation process, the two spring limiting tubes 300b are coaxially arranged to limit the expansion and contraction direction of the spring 300a, that is, the expansion and contraction direction of the elastic bearing component 300, and by adopting the spring limiting tube 300b, the magnitude of the non-axial force of the spring 300a can be reduced, and the seat will not swing when the external exciting force is attenuated.

[0038] Optionally, the driving assembly 400 is a linear motor; the linear motor does not need to convert the rotational motion into linear motion, and does not need a transmission structure, so the structure of the vibration reduction device is simple. In the specific implementation process, the linear motor includes an electromagnetic coil group and a magnetic steel expansion plate 400a, and the traveling wave magnetic field generated by the mover (magnetic steel expansion plate 400a) and the stator (electromagnetic coil group, not shown) causes the magnetic steel expansion plate 400a to move bidirectionally in the expansion direction. Most of the external vibration amplitude is offset by the linear motor, that is, the relative movement of the electromagnetic coil and the magnetic steel telescopic plate. In the specific implementation process, the linear motor can adopt existing products, which will not be described one by one here; in the specific implementation process, the magnetic steel telescopic plate 400a has four slide rails 400a-1; the slide rail 400a-1 is slidably connected with the guide rail slider 400b; the guide rail slider 400b remains fixed, and the moving pair between the slide rail 400a-1 and the guide rail slider 400b can maintain the telescopic direction of the magnetic steel telescopic plate 400a; in the specific implementation process, the magnetic steel telescopic plate 400a is fixedly connected to the seat connecting plate 100. Since it is easy for the linear motor to support its mover with magnetic suspension, a certain air gap is always maintained between the mover and the stator without contact, which eliminates the contact friction resistance between the stator and the mover, greatly improving the sensitivity, rapidity and follow-up of the system, and then the drive component of the present invention can respond quickly to cope with the randomness of road conditions.

[0039] Optionally, the vibration reduction device further comprises a guide assembly 500, the guide assembly 500 comprises a guide post 500a and a mounting seat 500b, wherein one end of the guide post 500a is movably connected to the mounting seat 500b and moves bidirectionally in the telescopic direction of the elastic bearing assembly 300, the other end of the guide post 500a is fixedly connected to the seat support plate 100, and the bottom end of the mounting seat 500b is fixedly connected to the vehicle body connecting plate 200; in a specific implementation process, the mounting seat 500b can be welded to the vehicle body connecting plate 200, or can be fixedly connected by threads; the guide post 500a can be welded to the seat support plate 100, or can be fixedly connected by threads. The mounting seat 500b is a part with a hollow structure, such as a graphite copper column (self-lubricating bearing) or a guide seat hole; the guide pillar 500a and the hollow structure of the mounting seat 500b are movably connected, such as a clearance fit or a transition fit between the two; the axial direction of the guide pillar 500a is the telescopic direction of the elastic bearing assembly 300, and when the driving assembly 400 is executed, the guide pillar 500a slides in the hollow structure; in the present invention, since the guide pillar is a movable rigid component (it can be understood that rigidity is compared with a spring), it can effectively ensure the directionality of the elastic bearing assembly 300 during attenuation and prevent the seat support plate 100 from swinging. Optionally, two other elastic bearing assemblies are arranged on both sides of the guide assembly 500 with its axis as the symmetry axis.

[0040] Optionally, the vibration reduction device further comprises a support component 600; a first end face 600a of the support component 600 is fixed to a side of the vehicle body connecting plate 200 provided with the elastic bearing component 300, and the support component 600 extends in the telescopic direction but does not contact the seat support plate 100. In a specific implementation process, the first end face 600a of the support component 600 is connected to a side of the vehicle body connecting plate 200 provided with the elastic bearing component 300 by a thread; the support component 600 extends in the telescopic direction of the elastic bearing component 300 but its second end face 600b does not contact the seat support plate 100; two opposite first side faces 600c of the support component 600 are respectively in contact with the guide rail sliders 400b on both sides of the drive component 400. Specifically, the first side faces 600c are in contact with the guide rail sliders 400b on both sides of the drive component 400. 00b surface contact and fixed by threads, at this time, the guide rail slider 400b remains fixed; the second side 600d of the support component 600 is in contact with the outer wall 400d of the drive component 400, specifically, the second side 600d is perpendicular to the first side 600c, the magnetic steel telescopic plate 400a is in sliding contact with the second side and the second side 600d is in fixed contact with the outer wall where the electromagnetic coil is located; not limited to this, the magnetic steel telescopic plate 400a and the second side 600d may also not be in contact; since the drive component 400 is vertically installed, it is subjected to axial tensile pressure. When it is subjected to pressure, the support component 600 can prevent the drive component from losing stability due to excessive pressure; and the support component 600 can keep the drive component 400 from deflecting during extension and retraction.

[0041] Optionally, the distance between the seat support plate 100 and the second end surface 600b of the support assembly 600 is greater than the maximum compression amount of the elastic bearing assembly 300. In this way, even if the driving assembly 400 pulls the seat support plate 100 toward the vehicle body connecting plate 200 (the elastic bearing assembly 300 is compressed), the seat support plate 100 will not be in rigid contact with the support assembly 600, preventing the seat support plate 100 from being rigidly hit, thereby effectively preventing the vehicle occupants from being subjected to rigid impact loads.

[0042] Optionally, the present invention also discloses a vibration reduction system.

[0043] Reference Figure 7As shown, the vibration reduction system includes a central processing unit 700, a sensor device 800 and a vibration reduction device. The specific structure of the vibration reduction device refers to the above embodiment. Since the vibration reduction system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one. During the specific implementation process, the central processing unit can be an on-board ECU or a processing device independent of the on-board ECU, such as a PLC controller; the sensing device can be a sensor that can identify road conditions or vehicle body movement conditions, such as an image recognizer for identifying road conditions (identifying road conditions), or a locator (identifying road conditions), or an acceleration sensor, a speed sensor or a displacement sensor (identifying vehicle body movement conditions), and the present invention is preferably an acceleration sensor; during the specific implementation process, the sensing device is communicatively connected to the central processing unit (can be a wireless connection such as through the EnOcean protocol, can be a wired connection such as an optical fiber connection), and the central processing unit is communicatively connected to the drive component 400 in the vibration reduction device (can be a wireless connection such as through the EnOcean protocol, can be a wired connection such as an optical fiber connection); the sensing device (the preferred acceleration sensor of the present invention) transmits the collected acceleration signal to the central processing unit (in which a PID control algorithm can be pre-set), and the central processing unit processes the acceleration signal to obtain a control command and sends it to the drive component 400 (such as a linear motor) in the vibration reduction device. ), the driving component 400 starts to drive the elastic bearing component 300 to extend or shorten in the direction specified in the control instruction; in the specific implementation process, for example: when the vehicle passes a pothole (or goes downhill), the entire vehicle body tends to move downward, at this time, the acceleration sensor of the vibration reduction system collects the downward acceleration signal generated by the pothole on the road surface and transmits it to the central processor, after the PID control algorithm is calculated, the control instruction is sent to the driver, the linear motor starts to work, and pushes the seat to move upward (opposite to the acceleration direction), the opposite elastic force can offset a part of the value of the external excitation generated by the acceleration (preferably the horizontal average value), and at the same time can keep the driver's line of sight floating within a certain height range (a certain height refers to the driver's line of sight when the vehicle is traveling on a horizontal ground); when the vehicle passes a bump (or goes uphill), the vehicle body tends to move upward, at this time, the acceleration sensor of the vibration reduction system collects the upward acceleration signal generated by the bump and transmits it to the central processor, after rapid calculation, the adjustment instruction is sent to the driver, the linear motor starts to work, pulls the seat downward, and keeps the driver's line of sight floating within a certain height range.

[0044] Optionally, the central processor 700 is installed on the third side 600e of the support assembly 600 away from the slide rail 400b; in the specific implementation process, an electrical box is installed on the third side 600e, in which the central processor 700 can be set. Setting the central processor 700 independently from the vehicle-mounted ECU is conducive to reducing communication time and improving communication efficiency. Optionally, the sensor device 800 can also be installed in the electrical box.

[0045] Optionally, the present invention further provides a vehicle seat, which includes a vibration reduction device or a vibration reduction system. The specific structure of the vibration reduction device or the vibration reduction system refers to the above embodiment. Since the vibration reduction device or the vibration reduction system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0046] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A vibration reduction device for a vehicle seat, characterized in that: include: Seat support plate, Body connecting plate, an elastic bearing assembly, one end of which is connected to the seat support plate and the other end of which is connected to the vehicle body connecting plate, and A driving assembly, the driving assembly extending from a lower area of ​​the vehicle body connecting plate facing the vehicle body to a side of the seat support plate facing the vehicle body connecting plate, the driving assembly driving the seat support plate to move in the telescopic direction of the elastic bearing assembly; A support component, wherein a first end face of the support component is fixed to a side of the vehicle body connecting plate where the elastic bearing component is provided, the support component extends in the telescopic direction, and a second end face of the support component does not contact the seat support plate, wherein two opposite first side faces of the support component are respectively in contact with guide rail sliders on both sides of the drive component; and a distance between the seat support plate and the second end face of the support component is greater than a maximum compression amount of the elastic bearing component; The drive assembly is connected to a central processing unit, and the central processing unit is connected to a sensor device; the sensor device is used to identify the road conditions of the vehicle and / or the movement conditions of the vehicle and transmit them to the central processing unit; the central processing unit generates corresponding control commands based on the road conditions of the vehicle and / or the movement conditions of the vehicle and sends them to the drive assembly, so that the drive assembly controls the relative movement of the seat support plate and the vehicle body connecting plate based on the control signal.

2. The vibration reduction device according to claim 1, characterized in that: The vibration reduction device comprises two elastic bearing components, and the two elastic bearing components are arranged on both sides of the driving component with the axis of the driving component as the axis of symmetry.

3. The vibration reduction device according to claim 2, characterized in that: The elastic bearing assembly includes a spring and two spring limit tubes; Wherein, the two spring limit tubes are respectively fixedly connected to the seat support plate and the vehicle body connecting plate; the two ends of the spring extend into the two spring limit tubes respectively, and are respectively fixedly connected to the seat support plate and the vehicle body connecting plate; The expansion and contraction direction of the spring is the expansion and contraction direction of the elastic bearing component.

4. The vibration reduction device according to claim 3, characterized in that: The driving component is a linear motor, which includes an electromagnetic coil and a magnetic steel expansion plate. Wherein, the magnetic steel telescopic plate is fixedly connected to the seat support plate.

5. The vibration reduction device according to any one of claims 1 to 4, characterized in that: The vibration reduction device further comprises: Guide assembly, including guide post and mounting seat, One end of the guide post extends into the mounting seat, and the guide post moves bidirectionally in the telescopic direction of the elastic bearing assembly. The other end of the guide post is fixedly connected to the seat support plate. The bottom end of the mounting seat is fixedly connected to the vehicle body connecting plate.

6. A vibration reduction system for a vehicle seat, characterized in that: It comprises the vibration reduction device according to any one of claims 1 to 5, a central processing unit and a sensor device.

7. The vibration reduction system according to claim 6, characterized in that: The vibration reduction device includes a supporting component and a driving component, and the central processing unit is installed on a third side surface of the supporting component away from the driving component.

8. A vehicle seat, characterized in that: The vehicle seat comprises the vibration damping device according to any one of claims 1-5.

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