Vibration absorber for a car seat, car seat assembly and car

Abstract

The utility model provides a kind of for the shock absorber of automobile seat, automobile seat assembly and car, shock absorber includes connecting support, at least one elastic piece, shell, connecting support includes first connecting part and second connecting part, first connecting part is used to be fixedly connected with automobile seat, and second connecting part includes at least one connecting site;The one end of each elastic piece is connected with corresponding connecting site, and the other end is connected with the inner wall of shell;In at least part elastic piece, the one end or both ends of elastic piece are equipped with rigidity adjusting member;And, rigidity adjusting member is deformable, and the elastic stiffness of corresponding elastic piece can be adjusted by adjusting the deformation degree of rigidity adjusting member. The elastic stiffness of elastic piece is changed by rigidity adjusting member to adaptively adjust, so that the shock absorbing frequency of shock absorber is consistent with automobile seat vibration frequency, active damping purposes can be achieved, to improve the reliability of shock absorber;And shock absorber has extensive applicability, and different automobile seat does not need to customize design shock absorber.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology, and specifically relates to a vibration absorber for automotive seats, an automotive seat assembly equipped with the automotive seat vibration absorber, and an automotive. Background Technology

[0002] Car seat vibration is a common problem in car use, usually caused by vibrations generated when driving on uneven or rough roads. Car seat vibration not only affects ride comfort but also leads to passenger fatigue and discomfort. Specifically, during vehicle operation, complex road surface excitations are transmitted to the body through the chassis. Because the seats are bolted to the body, they experience combined lateral, longitudinal, and vertical vibrations. If the seat design rigidity is insufficient, or if the lateral or longitudinal modes of the seat resonate with the excitation, the vibration problem will be amplified, leading to customer complaints.

[0003] Currently, the most common way to control seat vibration is to increase seat rigidity, but this method increases the overall vehicle weight and cost. Furthermore, because automakers sometimes design seats with multi-angle adjustment to enhance their product competitiveness, this design makes it difficult to increase seat rigidity, and may even prevent mass production.

[0004] Existing technologies also include adding vibration absorbers to seats to control seat vibration. However, because different weights, different sitting postures, and different backrest angles of occupants all affect the seat's modality, and the frequency adjustment range of existing seat vibration absorbers is limited, it is difficult to dynamically adapt to the seat vibration problem caused by different vibration frequencies, resulting in low vibration reduction efficiency. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the frequency adjustment range of existing car seat vibration absorbers is limited, making it difficult to dynamically adapt to seat vibrations of different frequencies.

[0006] To solve the above-mentioned technical problems, the vibration absorber for automobile seats disclosed in the embodiments of this utility model includes: a connecting bracket, the connecting bracket including a first connecting part and a second connecting part connected to each other, the first connecting part being used for fixed connection with the automobile seat, and the second connecting part including at least one connecting position; at least one elastic element, the at least one elastic element being provided in a one-to-one correspondence with the at least one connecting position, and one end of each elastic element being connected to the corresponding connecting position; a housing, the at least one elastic element being disposed in the housing, and the other end of each elastic element being connected to the inner wall of the housing; wherein, in at least some of the elastic elements of the vibration absorber, a stiffness adjustment element is provided between one end of each elastic element and the corresponding connecting position, and / or between the other end of each elastic element and the corresponding inner wall of the housing; and the stiffness adjustment element is deformable, and the elastic stiffness of the corresponding elastic element can be adjusted by adjusting the degree of deformation of the stiffness adjustment element.

[0007] In this design, the shell acts as a mass block, forming an additional mass spring resonance system for the car seat together with the elastic and stiffness adjustment components. This system generates a reaction force to reduce vibration when the car seat vibrates. The stiffness adjustment components adaptively adjust the elastic stiffness of the elastic components, ensuring the vibration absorption frequency of the shock absorber matches the vibration frequency of the car seat. This achieves active vibration reduction, addressing the issue of varying seat vibrations caused by different occupants and seat angles, thus improving the reliability of the shock absorber. Furthermore, the adjustable function of the shock absorber makes it suitable for seats of various sizes and shapes, offering broad applicability. Custom-designed shock absorbers are not required for different car seats, saving on production costs.

[0008] According to another specific embodiment of the present invention, the vibration absorber for automobile seats disclosed in this embodiment has a piezoelectric sheet as the stiffness adjustment component and a variable stiffness spring as the elastic component.

[0009] Using the above technical solution, the piezoelectric sheet has a simple structure. By changing the magnitude and polarity of the applied electric field, the direction and magnitude of the piezoelectric sheet displacement can be controlled, thereby achieving precise control of the elastic stiffness of the elastic element. The variable stiffness spring has high reliability, which improves the vibration reduction performance of the vibration absorber.

[0010] According to another specific embodiment of the present invention, the vibration absorber for automobile seats disclosed in this embodiment of the present invention has a first groove provided on the connection position, a corresponding stiffness adjustment member is provided in the first groove and is fixedly connected to the first groove; one end of the corresponding elastic member is provided in the first groove and is fixedly connected to the end of the stiffness adjustment member away from the bottom of the first groove.

[0011] By adopting the above technical solution, the stiffness adjustment components are centrally located, which facilitates control. Furthermore, the first groove facilitates the stable installation of the stiffness adjustment components and also serves as a guide for the elastic components.

[0012] According to another specific embodiment of the present invention, a vibration absorber for a car seat is disclosed in the embodiment of the present invention. The housing includes a housing body and a cover. One end of the housing body has an opening, and the cover is disposed at the opening and detachably fixedly connected to the housing body. The cover has a through hole, and the first connecting part of the connecting bracket passes through the through hole and extends out of the housing. The inner wall of the housing body is provided with at least one second groove, and at least one second groove is provided in correspondence with at least one elastic element. The other end of each elastic element is disposed in the corresponding second groove and fixedly connected to the bottom of the second groove.

[0013] Using the above technical solution, the cover and the shell body are detachably connected. When the vibration absorber malfunctions or needs to be replaced, the shell body can be disassembled for easy maintenance or replacement. The vibration absorber body is sealed inside the shell, which has a dustproof function. The second groove guides the elastic element.

[0014] According to another specific embodiment of the present invention, the vibration absorber for automobile seats disclosed in this embodiment includes at least one elastic element comprising at least one first elastic element, at least one second elastic element, and at least one third elastic element; at least one connecting position comprising at least one first connecting position, at least one second connecting position, and at least one third connecting position, wherein at least one first connecting position is correspondingly disposed to at least one first elastic element, at least one second connecting position is correspondingly disposed to at least one second elastic element, and at least one third connecting position is correspondingly disposed to at least one third elastic element; wherein each first elastic element extends along a first direction, and one end of each first elastic element is connected to the corresponding first connecting position; each second elastic element extends along a second direction, and one end of each second elastic element is connected to the corresponding second connecting position; each third elastic element extends along a third direction, and one end of each third elastic element is connected to the corresponding third connecting position; any two of the first direction, the second direction, and the third direction are perpendicular to each other.

[0015] By adopting the above technical solution, elastic elements are set in the first, second and third mutually perpendicular directions, which can realize the adjustment of the vibration absorption frequency of the vibration absorber in three directions. This can solve the problem of compound shaking in multiple directions caused by complex vibration environments such as rugged roads, and improve the overall ride comfort of the vehicle.

[0016] According to another specific embodiment of the present invention, the vibration absorber for automobile seats disclosed in this embodiment includes two first elastic elements, which are located on both sides of the second connecting portion in a first direction. There are also two first connecting positions, which are arranged opposite to each other in the first direction. One end of each of the two first elastic elements is connected to its corresponding first connecting position, and the other end is connected to the corresponding inner wall of the housing. Furthermore, there are two second elastic elements, which are located on both sides of the second connecting portion in a second direction. There are also two second connecting positions, which are arranged opposite to each other in the second direction. One end of each of the two second elastic elements is connected to its corresponding second connecting position, and the other end is connected to the corresponding inner wall of the housing. Finally, there is one third elastic element, located on the side of the second connecting portion away from the first connecting portion in a third-direction upward direction. There is also one third connecting position, which is arranged opposite to the first connecting portion in a third-direction upward direction. One end of the third elastic element is connected to its corresponding third connecting position, and the other end is connected to the corresponding inner wall of the housing.

[0017] By adopting the above technical solution, the seat vibration input from the first connecting part of the connecting bracket is dispersed through the five connecting positions of the second connecting part, realizing vibration absorption and adjustment in multiple directions, and enhancing the vibration absorption effect of the vibration absorber.

[0018] According to another specific embodiment of the present invention, the vibration absorber for automobile seats disclosed in the embodiment of the present invention has a stiffness adjustment element between one end of each elastic element and the corresponding connection position, and / or between the other end of each elastic element and the corresponding inner wall of the housing; the first connecting part of the connecting bracket has a detachable connecting structure, so that the connecting bracket can be detachably and fixedly connected to the automobile seat.

[0019] By adopting the above technical solution, the elastic stiffness of each elastic element can be adjusted, and the self-adjustment performance of the vibration absorber is better; the connecting bracket can be detachably connected to the car seat, which facilitates the maintenance or replacement of the vibration absorber.

[0020] This utility model also provides an automotive seat assembly, including an automotive seat and a vibration absorber provided by this utility model. The vibration absorber is disposed on the back of the automotive seat, and the first connecting part of the vibration absorber is fixedly connected to the back of the seat.

[0021] This utility model also provides an automobile, including an automobile seat, and a vibration absorber provided by this utility model. The vibration absorber is disposed on the back of the backrest of the automobile seat, and the first connecting part of the vibration absorber is fixedly connected to the backrest. A data acquisition device is disposed on the automobile seat and is used to acquire the vibration parameters of the automobile seat.

[0022] By adopting the above technical solution, the deformation degree of the stiffness adjustment component can be adjusted according to the vibration parameters of the car seat to adjust the elastic stiffness of the corresponding elastic component, resulting in higher adjustment precision for the vibration absorber.

[0023] According to another specific embodiment of the present invention, the automobile disclosed in this embodiment also includes a controller, which is electrically connected to the stiffness adjustment component of the data acquisition device and the vibration absorber respectively.

[0024] By adopting the above technical solution, the vibration absorber can be actively adjusted in real time through the controller, and it can respond quickly to the vibration of the seat. Attached Figure Description

[0025] Figure 1 This is a cross-sectional structural schematic diagram of the vibration absorber for car seats provided by this utility model;

[0026] Figure 2 This is a schematic diagram of the internal structure of the vibration absorber for car seats provided by this utility model (excluding the main body of the shell);

[0027] Figure 3 This is a schematic diagram of the external structure of the vibration absorber for car seats provided by this utility model;

[0028] Figure 4 This is a structural schematic diagram of the automobile seat assembly provided by this utility model;

[0029] Figure 5 This is a block diagram showing the connection structure of the data acquisition device, controller, and vibration absorber in an automobile provided by this utility model.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Vibration absorber

[0032] 10. Connecting bracket; 101. First connecting part; 102. Second connecting part; 1021. Connecting position; 10211. First groove; 10212. First connecting position; 10213. Second connecting position; 10214. Third connecting position.

[0033] 11. Elastic element; 111. First elastic element; 112. Second elastic element; 113. Third elastic element.

[0034] 12. Shell; 121. Shell body; 1211. Second groove; 122. Cover; 1221. Sealing ring;

[0035] 13. Stiffness adjustment components,

[0036] 2. Car seats,

[0037] 3. Data acquisition device

[0038] 4. Controller. Detailed Implementation

[0039] Car seat vibration is a common problem in car use, affecting not only ride comfort but also causing passenger fatigue and discomfort. Existing technology uses vibration absorbers to control seat vibration, but because different weights, sitting postures, and backrest angles all affect the seat's modality, and existing vibration absorbers have limited frequency adjustment ranges, they cannot dynamically adapt to the different vibration frequencies resulting in seat vibration, leading to low vibration reduction efficiency.

[0040] To address the aforementioned problems, this utility model provides a vibration absorber for automobile seats, comprising a connecting bracket for transmitting seat vibrations to the absorber, a housing serving as a mass block, an elastic element disposed within the housing and connected to the connecting bracket and the inner wall of the housing, and a stiffness adjustment element for adjusting the elastic stiffness of the elastic element, collectively forming an additional mass spring resonance system for the automobile seat. The stiffness adjustment element can adaptively adjust the elastic stiffness of the elastic element according to the vibration frequency of the automobile seat during driving, ensuring that the absorption frequency of the vibration absorber matches the vibration frequency of the automobile seat, achieving active vibration reduction. This solves the problem of varying seat vibrations caused by different occupants and angles, improving the reliability of the vibration absorber. Furthermore, the adjustable function of the vibration absorber makes it applicable to seats of various sizes and shapes, exhibiting wide applicability. Different automobile seats do not require custom-designed vibration absorbers, saving on production costs.

[0041] To better understand the vibration absorber for automobile seats and its installation method provided in this application, the vibration absorber for automobile seats and the automobile seat equipped with the vibration absorber are described in detail below with reference to the accompanying drawings.

[0042] Example 1

[0043] This utility model provides a vibration absorber for automobile seats, such as... Figure 1 As shown, the vibration absorber includes a connecting bracket 10, at least one elastic element 11, a housing 12, and a stiffness adjustment element 13. The connecting bracket 10 includes a first connecting portion 101 and a second connecting portion 102 connected to each other. The first connecting portion 101 is used for fixed connection with the car seat, and the second connecting portion 102 includes at least one connecting position 1021. The connecting bracket 10 can be made of weight-reducing materials such as metal or resin plastic, and can transmit the vibration of the seat to the vibration absorber. Figure 1 and Figure 2As shown, at least one elastic element 11 is correspondingly provided with at least one connection position 1021, and one end of each elastic element 11 is connected to the corresponding connection position 1021; the elastic element 11 can specifically be a spring or a rubber bushing, as long as it can store mechanical energy through deformation; in one specific embodiment, the elastic element 11 is a variable stiffness spring, specifically one of a gradually changing pitch spring or a conical spring; using a variable stiffness spring provides high reliability and improves the vibration damping performance of the vibration absorber. Figure 1 As shown, at least one elastic element 11 is disposed in the housing 12, and the other end of each elastic element 11 is connected to the inner wall of the housing 12. It should be noted that the housing 12 needs to be fixed, specifically it can be fixed to the connecting bracket 10 or the seat. The housing 12 also serves as the mass block of the vibration absorber, which can generate a movement opposite to the vibration input to the vibration absorber. The housing 12 can be made of metal and its shape can be a regular shape such as a cube, polyhedron, or sphere, preferably... Figure 1 and Figure 3 The cube shape shown.

[0044] like Figure 1 As shown, in at least some of the elastic elements 11 of the vibration absorber, a stiffness adjustment element 13 is provided between one end of each elastic element 11 and the corresponding connection position 1021, and / or between the other end of each elastic element 11 and the corresponding inner wall of the housing 12; that is, at least one or both ends of the elastic elements 11 are provided with a stiffness adjustment element 13. Specifically, the stiffness adjustment element 13 can be arranged according to the arrangement of the elastic elements 11, the vibration frequency and amplitude in different directions, etc. If the elastic elements 11 are arranged in multiple directions and there are many of them, the stiffness adjustment element 13 can be set at the corresponding position of the elastic element 11 in the direction of higher vibration frequency and / or larger vibration amplitude. If the number of elastic elements 11 is small, the stiffness adjustment element 13 can be set at the corresponding position of each elastic element 11.

[0045] In one specific implementation, such as Figure 1 As shown, in all the elastic elements 11 of the vibration absorber, a stiffness adjustment element 13 is provided between one end of each elastic element 11 and the corresponding connection position 1021, and / or between the other end of each elastic element 11 and the corresponding inner wall of the housing 12. This arrangement ensures that the elastic stiffness of each elastic element 11 is adjustable, and the self-adaptive adjustment performance of the vibration absorber is better.

[0046] The stiffness adjustment component 13 is deformable, and the elastic stiffness of the corresponding elastic component 11 can be adjusted by adjusting the degree of deformation of the stiffness adjustment component 13. Specifically, the stiffness adjustment component 13 can be a piezoelectric sheet, an electromagnetic induction vibrating sheet, a pneumatic rod, or a hydraulic rod, as long as it can change the elastic stiffness of the elastic component 11 by generating deformation or displacement to change its extension and contraction. In one specific embodiment, the stiffness adjustment component 13 is a piezoelectric sheet connected to an external power source. By applying an electric field, the piezoelectric sheet deforms, thereby generating displacement and changing the elastic stiffness of the connected elastic component 11. By changing the magnitude and polarity of the electric field, the direction and magnitude of the displacement can be controlled, achieving precise control of the elastic stiffness of the elastic component 11.

[0047] The vibration absorber provided by this utility model uses the housing 12 as a mass block, which together with the elastic element 11 and the stiffness adjustment element 13 forms an additional mass spring resonance system for the car seat. This additional system generates a reaction force to reduce the vibration of the car seat when it vibrates. Furthermore, the elastic stiffness of the elastic element 11 can be adaptively adjusted by changing the stiffness adjustment element 13, so that the vibration absorption frequency of the vibration absorber matches the vibration frequency of the car seat, thereby achieving the purpose of active vibration reduction. This solves the problem of different seat vibrations caused by different occupants and seat angles, and improves the reliability of the vibration absorber. Moreover, the adjustment function of the vibration absorber makes it applicable to seats of various sizes and shapes, with wide applicability. Different car seats do not require customized design of vibration absorbers, saving vibration absorber production costs.

[0048] In one specific implementation, such as Figure 1 As shown, a first groove 10211 is provided on the connection position 1021, and the corresponding stiffness adjustment member 13 is disposed in the first groove 10211 and fixedly connected to the first groove 10211; one end of the corresponding elastic member 11 is disposed in the first groove 10211 and fixedly connected to the end of the stiffness adjustment member 13 away from the bottom of the first groove 10211; wherein, the fixed connection method between the stiffness adjustment member 13 and the first groove 10211 can be snap-fit, adhesive, welding, etc. Taking the stiffness adjustment member 13 as a piezoelectric sheet as an example, the piezoelectric sheet can be connected to the first groove 10211 and the elastic member 11 respectively by adhesive.

[0049] In this embodiment, the stiffness adjustment member 13 is set at one end of the elastic member 11 near the connecting bracket 10. The setting position is concentrated, which is convenient for control. The first groove 10211 facilitates the stable setting of the stiffness adjustment member 13 and also plays a guiding role for the elastic member 11.

[0050] In one specific implementation, such as Figure 1 and Figure 3As shown, the housing 12 includes a housing body 121 and a cover 122. One end of the housing body 121 has an opening, and the cover 122 is disposed at the opening and detachably fixedly connected to the housing body 121, such as by bolts. When the vibration absorber malfunctions or requires replacement, disassembling the housing 12 facilitates maintenance or replacement. Figure 2 and Figure 3 As shown, the cover 122 has a through hole, through which the first connecting part 101 of the connecting bracket 10 passes and extends from inside the housing 12. A sealing ring 1221 can also be provided in the through hole to seal the gap between the cover 122 and the connecting bracket 10. The vibration absorber body is sealed inside the housing 12, providing dust protection. The cover 122 can be made of plastic or metal. Figure 1 As shown, the inner wall of the shell body 121 is provided with at least one second groove 1211. At least one second groove 1211 is provided in correspondence with at least one elastic member 11, and the other end of each elastic member 11 is provided in the corresponding second groove 1211 and is fixedly connected to the bottom of the groove 1211. Specifically, they can be connected by adhesive bonding. The second groove 1211 plays a guiding role for the elastic member 11.

[0051] In one specific implementation, such as Figure 2 As shown, at least one elastic element 11 includes at least one first elastic element 111, at least one second elastic element 112, and at least one third elastic element 113; at least one connection position 1021 includes at least one first connection position 10212, at least one second connection position 10213, and at least one third connection position 10214. At least one first connection position 10212 corresponds to at least one first elastic element 111, at least one second connection position 10213 corresponds to at least one second elastic element 112, and at least one third connection position 10214 corresponds to at least one third elastic element 113. Each first elastic element 111 is along a first direction (… Figure 2 Extending in the x-direction, and one end of each first elastic member 111 is connected to the corresponding first connection position 10212; each second elastic member 112 extends along the second direction ( Figure 2 In the y-direction), and one end of each second elastic member 112 is connected to the corresponding second connection position 10213; each third elastic member 113 is along the third direction ( Figure 2 The third elastic element 113 extends in the z-direction and one end of each third elastic element 113 is connected to the corresponding third connection position 10214; any two of the first direction, second direction and third direction are perpendicular to each other.

[0052] Traditional seat vibration absorbers are mostly unidirectional, which cannot effectively suppress the compound vibration of car seats in multiple directions. By adopting the above solution, elastic elements 11 are set in the first, second and third directions that are perpendicular to each other. This allows for the adjustment of the vibration absorption frequency of the vibration absorber in the three directions, which can solve the problem of compound shaking of car seats in multiple directions caused by complex vibration environments such as rough roads, and improve the overall ride comfort of the vehicle.

[0053] In one specific implementation, such as Figure 2 As shown, there are two first elastic elements 111, and the two first elastic elements 111 are located in the second connecting portion 102 in the first direction ( Figure 2 On both sides of the x-direction, there are two first connection bits 10212, and the two first connection bits 10212 are in the first direction (x-direction). Figure 2 The two first elastic elements 111 are arranged opposite each other in the x-direction. One end of each first elastic element 111 is connected to a corresponding first connecting position 10212, and the other end is connected to the corresponding inner wall of the housing 12 (not shown in the figure). There are two second elastic elements 112, and the two second elastic elements 112 are located on the second connecting part 102 in the second direction (x-direction). Figure 2 On both sides of the y-direction, there are two second connection positions 10213, and the two second connection positions 10213 are in the second direction ( Figure 2 The two second elastic members 112 are arranged opposite each other in the y-direction. One end of each second elastic member 112 is connected to a corresponding second connecting position 10213, and the other end is connected to the corresponding inner wall of the housing 12 (not shown in the figure). A third elastic member 113 is provided and is located in the third direction of the second connecting part 102. Figure 2 On the side away from the first connecting portion 101 in the z-direction, a third connecting position 10214 is provided, and is connected to the first connecting portion 101 in the third direction (z-direction). Figure 2 The third elastic element 113 is arranged opposite to each other in the z-direction. One end of the third elastic element 113 is connected to the third connection position 10214, and the other end is connected to the inner wall of the housing 12 (not shown in the figure).

[0054] In the above configuration, the connecting bracket 10 and the elastic element 11 form a cross-shaped structure, wherein elastic elements 11 are respectively provided at both ends of the connecting bracket 10 along the first direction and at both ends of the connecting bracket 10 along the second direction. The seat vibration input from the first connecting part 101 of the connecting bracket 10 is dispersed through the five connecting positions 1021 of the second connecting part 102, realizing vibration absorption and adjustment in multiple directions, and enhancing the vibration absorption effect of the vibration absorber.

[0055] In one specific implementation, such as Figure 1 and Figure 3As shown, the first connecting portion 101 of the connecting bracket 10 has a detachable connecting structure, allowing the connecting bracket 10 to be detachably and fixedly connected to the car seat. Specifically, the first connecting portion 101 can be detachably connected to the car seat by providing a snap-fit ​​structure, or as shown in the diagram. Figure 1 and Figure 3 As shown, the first connecting part 101 is provided with a threaded hole, which allows the first connecting part 101 to be screwed onto the car seat.

[0056] Example 2

[0057] This embodiment provides an automotive seat assembly, such as... Figure 4 As shown, the device includes a car seat 2 and a vibration absorber 1 provided in Embodiment 1. The vibration absorber 1 is disposed on the back of the car seat 2, and the first connecting part 101 of the vibration absorber 1 is fixedly connected to the backrest. More specifically, the first connecting part 101 can be screwed to the backrest.

[0058] Example 3

[0059] This embodiment provides a car, including a car seat, a vibration absorber and a data acquisition device as described in Embodiment 1. The vibration absorber is disposed on the backrest side of the car seat, and its first connecting part is fixedly connected to the backrest. The data acquisition device is disposed on the car seat and is used to collect the vibration parameters of the car seat. Specifically, the data acquisition device can be a vibration sensor. The operator can adjust the deformation degree of the stiffness adjustment component according to the vibration parameters of the car seat to adjust the elastic stiffness of the corresponding elastic component, resulting in higher adjustment accuracy of the vibration absorber.

[0060] In one specific implementation, the vehicle also includes a controller, such as... Figure 5 As shown, the controller 4 is electrically connected to both the data acquisition device 3 and the stiffness adjustment component 13 of the vibration absorber 1. The data acquisition device 3 transmits the collected vibration parameters of the car seat to the controller 4. The controller 4 adjusts the deformation of the stiffness adjustment component 13 according to the vibration parameters of the car seat to adjust the elastic stiffness of the corresponding elastic component of the vibration absorber 1. This enables the vibration absorber 1 to actively adjust in real time and respond quickly to seat vibrations. The specific adjustment method can be based on existing seat vibration reduction control methods. The controller 4 can be a vehicle controller or a car seat controller, etc.

[0061] To more clearly illustrate the adjustment method of the stiffness adjustment component, the following example uses a variable stiffness spring as the elastic element, a piezoelectric sheet as the stiffness adjustment component, and multiple elastic elements arranged along the first, second, and third directions respectively to illustrate the method of adjusting the stiffness adjustment component according to the vibration parameters of the car seat.

[0062] The data acquisition device collects vibration parameters of the car seat in real time during vehicle operation. These parameters include the vibration spectrum signal of the seat frame. The device transmits these parameters to the controller, which analyzes the peak vibration magnitude and frequency of the seat in three directions under this condition. Based on the peak vibration magnitude, the controller determines which directions require vibration absorption and analyzes the required absorption frequency. Then, by applying an electric field to the piezoelectric element in the direction requiring vibration absorption, the piezoelectric element in that direction undergoes mechanical displacement, thereby adjusting the elastic stiffness of the strain stiffness spring. This ensures that the absorption frequency of the vibration absorber matches the peak vibration frequency of the seat in the current state. The vibration parameters also include real-time noise signals. Furthermore, based on the real-time noise signals provided by the data acquisition device, the device detects whether the peak value at that frequency has decreased, thus ensuring that the vibration absorber achieves real-time active vibration reduction.

[0063] Vibration parameters also include the peak magnitude and frequency of seat vibration in different directions. When the car is in motion, if the seat back angle and passenger posture remain unchanged, that is, when the acquisition device detects that the peak magnitude and frequency of seat vibration in three directions are within a constant range, the controller analyzes the direction and frequency of vibration absorption based on the received information. By controlling the electric field of the piezoelectric element in that direction, the elastic stiffness of the corresponding variable stiffness spring is kept at a specific value, ensuring that the vibration absorption frequency in that direction matches the peak vibration frequency of the current seat frame. Furthermore, the controller verifies whether the peak seat vibration has decreased based on the real-time noise signal provided by the acquisition device, thereby achieving vibration reduction.

[0064] A vibration absorber is a resonant system with an added mass and spring on a vibrating object. During vibration, it generates a reaction force that reduces the vibration of the object. The absorption frequency f in a certain direction is obtained using the following formula:

[0065]

[0066] Where K is the elastic stiffness of the spring in the corresponding direction; M is the weight of the mass block, that is, the weight of the shock absorber housing.

[0067] The vibration absorber provided by this invention uses a controller to control the electric field magnitude of the piezoelectric plates corresponding to springs extending in different directions in real time, based on the vibration parameters of the seat collected by the acquisition device. This, in turn, adjusts the elastic stiffness of the springs in those directions in real time. For example, if the vertical vibration peak value of the seat is detected to exceed the standard and the frequency increases, the controller increases the electric field of the piezoelectric plate corresponding to the vertically extending spring in real time, causing it to displace and push the spring, thereby increasing the vertical frequency of the vibration absorber. This makes the natural frequency of the vibration absorber match the current vertical peak value of the seat vibration. Conversely, it decreases the electric field of the corresponding piezoelectric plate, reducing the absorption frequency of the vibration absorber. Furthermore, the controller further verifies whether the seat vibration peak value has decreased based on the real-time vibration signal provided by the acquisition device, thus achieving real-time vibration reduction. Vibration reduction in other directions also adopts the same vibration absorption strategy, which will not be elaborated here.

[0068] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0069] It should be noted that similar reference numerals and letters in this specification are similar items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0070] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0071] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0072] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0073] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A vibration absorber for automobile seats, characterized in that, The vibration absorber includes: A connecting bracket, the connecting bracket including a first connecting part and a second connecting part that are connected to each other, the first connecting part being used for fixed connection with the car seat, and the second connecting part including at least one connecting position; At least one elastic element is provided, and the at least one elastic element is provided in a one-to-one correspondence with the at least one connection position, and one end of each elastic element is connected to the corresponding connection position; A housing, wherein at least one elastic element is disposed in the housing, and the other end of each elastic element is connected to the inner wall of the housing; In the vibration absorber, at least some of the elastic elements are provided with a stiffness adjustment element between one end of each elastic element and the corresponding connection position, and / or between the other end of each elastic element and the corresponding inner wall of the housing; and the stiffness adjustment element is deformable, and the elastic stiffness of the corresponding elastic element can be adjusted by adjusting the degree of deformation of the stiffness adjustment element.

2. The vibration absorber for automobile seats as described in claim 1, characterized in that, The stiffness adjustment element is a piezoelectric sheet; the elastic element is a variable stiffness spring.

3. The vibration absorber for automobile seats as described in claim 1, characterized in that, A first groove is provided on the connection position, and the corresponding stiffness adjustment member is disposed in the first groove and fixedly connected to the first groove; one end of the corresponding elastic member is disposed in the first groove and fixedly connected to the end of the stiffness adjustment member away from the bottom of the first groove.

4. The vibration absorber for automobile seats as described in claim 1, characterized in that, The housing includes a housing body and a cover, one end of the housing body has an opening, and the cover is disposed at the opening and detachably fixedly connected to the housing body; The cover has a through hole, and the first connecting part of the connecting bracket passes through the through hole and extends out of the housing; The inner wall of the shell body is provided with at least one second groove, and the at least one second groove is provided in a one-to-one correspondence with the at least one elastic element, and the other end of each elastic element is provided in the corresponding second groove and is fixedly connected to the bottom of the second groove.

5. The vibration absorber for automobile seats as described in claim 1, characterized in that, The at least one elastic element includes at least one first elastic element, at least one second elastic element, and at least one third elastic element; the at least one connection position includes at least one first connection position, at least one second connection position, and at least one third connection position, wherein the at least one first connection position corresponds to the at least one first elastic element, the at least one second connection position corresponds to the at least one second elastic element, and the at least one third connection position corresponds to the at least one third elastic element; wherein... Each first elastic element extends along a first direction, and one end of each first elastic element is connected to the corresponding first connection position; Each second elastic member extends along a second direction, and one end of each second elastic member is connected to the corresponding second connection position; Each third elastic member extends along a third direction, and one end of each third elastic member is connected to the corresponding third connection position; Any two of the first direction, the second direction, and the third direction are perpendicular to each other.

6. The shock absorber for automobile seats as described in claim 5, characterized in that, There are two first elastic elements, and the two first elastic elements are located on both sides of the second connecting portion in the first direction. There are two first connecting positions, and the two first connecting positions are arranged opposite to each other in the first direction. One end of each of the two first elastic elements is connected to the corresponding first connecting position, and the other end is connected to the inner wall of the housing. There are two second elastic members, and the two second elastic members are located on both sides of the second connecting portion in the second direction. There are two second connecting positions, and the two second connecting positions are arranged opposite to each other in the second direction. One end of each of the two second elastic members is connected to the corresponding second connecting position, and the other end is connected to the inner wall of the housing. The third elastic member is one and located on the side of the second connecting part away from the first connecting part in the third direction. The third connecting position is one and is disposed opposite to the first connecting part in the third direction. One end of the third elastic member is connected to the third connecting position, and the other end is connected to the inner wall of the housing.

7. The vibration absorber for automobile seats as described in any one of claims 1-6, characterized in that: In all the elastic elements of the vibration absorber, a stiffness adjustment element is provided between one end of each elastic element and the corresponding connection position, and / or between the other end of each elastic element and the corresponding inner wall of the housing; The first connecting portion of the connecting bracket has a detachable connecting structure, allowing the connecting bracket to be detachably and fixedly connected to the car seat.

8. A car seat assembly, comprising a car seat, characterized in that, It also includes a vibration absorber as described in any one of claims 1-7, wherein the vibration absorber is disposed on the back of the car seat, and the first connecting portion of the vibration absorber is fixedly connected to the back of the seat.

9. A car, including a car seat, characterized in that, The vehicle also includes: The vibration absorber as described in any one of claims 1-7 is disposed on the backrest side of the car seat, and the first connecting portion of the vibration absorber is fixedly connected to the backrest. A data acquisition device is installed on the car seat and is used to acquire the vibration parameters of the car seat.

10. The automobile as described in claim 9, characterized in that, The vehicle also includes a controller, which is electrically connected to the acquisition device and the stiffness adjustment component of the vibration absorber.

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